From 41669237cd714c59af9e634cb2ac162d6ee57e82 Mon Sep 17 00:00:00 2001 From: Jelmer Vernooij Date: Tue, 16 Sep 2008 16:39:45 +0200 Subject: Use single copy of socket_wrapper in Samba 3 and Samba 4. --- socket_wrapper/config.m4 | 22 + socket_wrapper/config.mk | 8 + socket_wrapper/socket_wrapper.c | 1841 +++++++++++++++++++++++++++ socket_wrapper/socket_wrapper.h | 136 ++ socket_wrapper/testsuite.c | 105 ++ source3/configure.in | 2 +- source3/lib/replace/system/network.h | 2 +- source3/lib/socket_wrapper/config.m4 | 22 - source3/lib/socket_wrapper/config.mk | 8 - source3/lib/socket_wrapper/socket_wrapper.c | 1841 --------------------------- source3/lib/socket_wrapper/socket_wrapper.h | 136 -- source3/lib/socket_wrapper/testsuite.c | 105 -- source4/Makefile | 2 +- source4/configure.ac | 2 +- source4/lib/replace/system/network.h | 2 +- source4/lib/socket_wrapper/config.m4 | 22 - source4/lib/socket_wrapper/config.mk | 8 - source4/lib/socket_wrapper/socket_wrapper.c | 1841 --------------------------- source4/lib/socket_wrapper/socket_wrapper.h | 136 -- source4/lib/socket_wrapper/testsuite.c | 105 -- source4/main.mk | 2 +- source4/torture/local/config.mk | 2 +- 22 files changed, 2119 insertions(+), 4231 deletions(-) create mode 100644 socket_wrapper/config.m4 create mode 100644 socket_wrapper/config.mk create mode 100644 socket_wrapper/socket_wrapper.c create mode 100644 socket_wrapper/socket_wrapper.h create mode 100644 socket_wrapper/testsuite.c delete mode 100644 source3/lib/socket_wrapper/config.m4 delete mode 100644 source3/lib/socket_wrapper/config.mk delete mode 100644 source3/lib/socket_wrapper/socket_wrapper.c delete mode 100644 source3/lib/socket_wrapper/socket_wrapper.h delete mode 100644 source3/lib/socket_wrapper/testsuite.c delete mode 100644 source4/lib/socket_wrapper/config.m4 delete mode 100644 source4/lib/socket_wrapper/config.mk delete mode 100644 source4/lib/socket_wrapper/socket_wrapper.c delete mode 100644 source4/lib/socket_wrapper/socket_wrapper.h delete mode 100644 source4/lib/socket_wrapper/testsuite.c diff --git a/socket_wrapper/config.m4 b/socket_wrapper/config.m4 new file mode 100644 index 0000000000..23f033e664 --- /dev/null +++ b/socket_wrapper/config.m4 @@ -0,0 +1,22 @@ +AC_ARG_ENABLE(socket-wrapper, +[ --enable-socket-wrapper Turn on socket wrapper library (default=no)]) + +DEFAULT_TEST_OPTIONS= +HAVE_SOCKET_WRAPPER=no + +if eval "test x$developer = xyes"; then + enable_socket_wrapper=yes +fi + +if eval "test x$enable_socket_wrapper = xyes"; then + AC_DEFINE(SOCKET_WRAPPER,1,[Use socket wrapper library]) + DEFAULT_TEST_OPTIONS=--socket-wrapper + HAVE_SOCKET_WRAPPER=yes + + # this is only used for samba3 + SOCKET_WRAPPER_OBJS="../socket_wrapper/socket_wrapper.o" +fi + +AC_SUBST(DEFAULT_TEST_OPTIONS) +AC_SUBST(HAVE_SOCKET_WRAPPER) +AC_SUBST(SOCKET_WRAPPER_OBJS) diff --git a/socket_wrapper/config.mk b/socket_wrapper/config.mk new file mode 100644 index 0000000000..60cfb3209a --- /dev/null +++ b/socket_wrapper/config.mk @@ -0,0 +1,8 @@ +############################## +# Start SUBSYSTEM SOCKET_WRAPPER +[SUBSYSTEM::SOCKET_WRAPPER] +PRIVATE_DEPENDENCIES = LIBREPLACE_NETWORK +# End SUBSYSTEM SOCKET_WRAPPER +############################## + +SOCKET_WRAPPER_OBJ_FILES = $(socketwrappersrcdir)/socket_wrapper.o diff --git a/socket_wrapper/socket_wrapper.c b/socket_wrapper/socket_wrapper.c new file mode 100644 index 0000000000..336179d837 --- /dev/null +++ b/socket_wrapper/socket_wrapper.c @@ -0,0 +1,1841 @@ +/* + * Copyright (C) Jelmer Vernooij 2005,2008 + * Copyright (C) Stefan Metzmacher 2006 + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the author nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ + +/* + Socket wrapper library. Passes all socket communication over + unix domain sockets if the environment variable SOCKET_WRAPPER_DIR + is set. +*/ + +#ifdef _SAMBA_BUILD_ + +#define SOCKET_WRAPPER_NOT_REPLACE +#include "lib/replace/replace.h" +#include "system/network.h" +#include "system/filesys.h" +#include "system/time.h" + +#else /* _SAMBA_BUILD_ */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#endif + +#ifndef _PUBLIC_ +#define _PUBLIC_ +#endif + +#define SWRAP_DLIST_ADD(list,item) do { \ + if (!(list)) { \ + (item)->prev = NULL; \ + (item)->next = NULL; \ + (list) = (item); \ + } else { \ + (item)->prev = NULL; \ + (item)->next = (list); \ + (list)->prev = (item); \ + (list) = (item); \ + } \ +} while (0) + +#define SWRAP_DLIST_REMOVE(list,item) do { \ + if ((list) == (item)) { \ + (list) = (item)->next; \ + if (list) { \ + (list)->prev = NULL; \ + } \ + } else { \ + if ((item)->prev) { \ + (item)->prev->next = (item)->next; \ + } \ + if ((item)->next) { \ + (item)->next->prev = (item)->prev; \ + } \ + } \ + (item)->prev = NULL; \ + (item)->next = NULL; \ +} while (0) + +/* LD_PRELOAD doesn't work yet, so REWRITE_CALLS is all we support + * for now */ +#define REWRITE_CALLS + +#ifdef REWRITE_CALLS +#define real_accept accept +#define real_connect connect +#define real_bind bind +#define real_listen listen +#define real_getpeername getpeername +#define real_getsockname getsockname +#define real_getsockopt getsockopt +#define real_setsockopt setsockopt +#define real_recvfrom recvfrom +#define real_sendto sendto +#define real_ioctl ioctl +#define real_recv recv +#define real_send send +#define real_socket socket +#define real_close close +#endif + +#ifdef HAVE_GETTIMEOFDAY_TZ +#define swrapGetTimeOfDay(tval) gettimeofday(tval,NULL) +#else +#define swrapGetTimeOfDay(tval) gettimeofday(tval) +#endif + +/* we need to use a very terse format here as IRIX 6.4 silently + truncates names to 16 chars, so if we use a longer name then we + can't tell which port a packet came from with recvfrom() + + with this format we have 8 chars left for the directory name +*/ +#define SOCKET_FORMAT "%c%02X%04X" +#define SOCKET_TYPE_CHAR_TCP 'T' +#define SOCKET_TYPE_CHAR_UDP 'U' +#define SOCKET_TYPE_CHAR_TCP_V6 'X' +#define SOCKET_TYPE_CHAR_UDP_V6 'Y' + +#define MAX_WRAPPED_INTERFACES 16 + +#define SW_IPV6_ADDRESS 1 + +static struct sockaddr *sockaddr_dup(const void *data, socklen_t len) +{ + struct sockaddr *ret = (struct sockaddr *)malloc(len); + memcpy(ret, data, len); + return ret; +} + +static void set_port(int family, int prt, struct sockaddr *addr) +{ + switch (family) { + case AF_INET: + ((struct sockaddr_in *)addr)->sin_port = htons(prt); + break; +#ifdef HAVE_IPV6 + case AF_INET6: + ((struct sockaddr_in6 *)addr)->sin6_port = htons(prt); + break; +#endif + } +} + +static size_t socket_length(int family) +{ + switch (family) { + case AF_INET: + return sizeof(struct sockaddr_in); +#ifdef HAVE_IPV6 + case AF_INET6: + return sizeof(struct sockaddr_in6); +#endif + } + return 0; +} + + + +struct socket_info +{ + int fd; + + int family; + int type; + int protocol; + int bound; + int bcast; + int is_server; + + char *path; + char *tmp_path; + + struct sockaddr *myname; + socklen_t myname_len; + + struct sockaddr *peername; + socklen_t peername_len; + + struct { + unsigned long pck_snd; + unsigned long pck_rcv; + } io; + + struct socket_info *prev, *next; +}; + +static struct socket_info *sockets; + +const char *socket_wrapper_dir(void) +{ + const char *s = getenv("SOCKET_WRAPPER_DIR"); + if (s == NULL) { + return NULL; + } + if (strncmp(s, "./", 2) == 0) { + s += 2; + } + return s; +} + +unsigned int socket_wrapper_default_iface(void) +{ + const char *s = getenv("SOCKET_WRAPPER_DEFAULT_IFACE"); + if (s) { + unsigned int iface; + if (sscanf(s, "%u", &iface) == 1) { + if (iface >= 1 && iface <= MAX_WRAPPED_INTERFACES) { + return iface; + } + } + } + + return 1;/* 127.0.0.1 */ +} + +static int convert_un_in(const struct sockaddr_un *un, struct sockaddr *in, socklen_t *len) +{ + unsigned int iface; + unsigned int prt; + const char *p; + char type; + + p = strrchr(un->sun_path, '/'); + if (p) p++; else p = un->sun_path; + + if (sscanf(p, SOCKET_FORMAT, &type, &iface, &prt) != 3) { + errno = EINVAL; + return -1; + } + + if (iface == 0 || iface > MAX_WRAPPED_INTERFACES) { + errno = EINVAL; + return -1; + } + + if (prt > 0xFFFF) { + errno = EINVAL; + return -1; + } + + switch(type) { + case SOCKET_TYPE_CHAR_TCP: + case SOCKET_TYPE_CHAR_UDP: { + struct sockaddr_in *in2 = (struct sockaddr_in *)in; + + if ((*len) < sizeof(*in2)) { + errno = EINVAL; + return -1; + } + + memset(in2, 0, sizeof(*in2)); + in2->sin_family = AF_INET; + in2->sin_addr.s_addr = htonl((127<<24) | iface); + in2->sin_port = htons(prt); + + *len = sizeof(*in2); + break; + } +#ifdef HAVE_IPV6 + case SOCKET_TYPE_CHAR_TCP_V6: + case SOCKET_TYPE_CHAR_UDP_V6: { + struct sockaddr_in6 *in2 = (struct sockaddr_in6 *)in; + + if ((*len) < sizeof(*in2)) { + errno = EINVAL; + return -1; + } + + memset(in2, 0, sizeof(*in2)); + in2->sin6_family = AF_INET6; + in2->sin6_addr.s6_addr[0] = SW_IPV6_ADDRESS; + in2->sin6_port = htons(prt); + + *len = sizeof(*in2); + break; + } +#endif + default: + errno = EINVAL; + return -1; + } + + return 0; +} + +static int convert_in_un_remote(struct socket_info *si, const struct sockaddr *inaddr, struct sockaddr_un *un, + int *bcast) +{ + char type = '\0'; + unsigned int prt; + unsigned int iface; + int is_bcast = 0; + + if (bcast) *bcast = 0; + + switch (si->family) { + case AF_INET: { + const struct sockaddr_in *in = + (const struct sockaddr_in *)inaddr; + unsigned int addr = ntohl(in->sin_addr.s_addr); + char u_type = '\0'; + char b_type = '\0'; + char a_type = '\0'; + + switch (si->type) { + case SOCK_STREAM: + u_type = SOCKET_TYPE_CHAR_TCP; + break; + case SOCK_DGRAM: + u_type = SOCKET_TYPE_CHAR_UDP; + a_type = SOCKET_TYPE_CHAR_UDP; + b_type = SOCKET_TYPE_CHAR_UDP; + break; + } + + prt = ntohs(in->sin_port); + if (a_type && addr == 0xFFFFFFFF) { + /* 255.255.255.255 only udp */ + is_bcast = 2; + type = a_type; + iface = socket_wrapper_default_iface(); + } else if (b_type && addr == 0x7FFFFFFF) { + /* 127.255.255.255 only udp */ + is_bcast = 1; + type = b_type; + iface = socket_wrapper_default_iface(); + } else if ((addr & 0xFFFFFF00) == 0x7F000000) { + /* 127.0.0.X */ + is_bcast = 0; + type = u_type; + iface = (addr & 0x000000FF); + } else { + errno = ENETUNREACH; + return -1; + } + if (bcast) *bcast = is_bcast; + break; + } +#ifdef HAVE_IPV6 + case AF_INET6: { + const struct sockaddr_in6 *in = + (const struct sockaddr_in6 *)inaddr; + + switch (si->type) { + case SOCK_STREAM: + type = SOCKET_TYPE_CHAR_TCP_V6; + break; + case SOCK_DGRAM: + type = SOCKET_TYPE_CHAR_UDP_V6; + break; + } + + /* XXX no multicast/broadcast */ + + prt = ntohs(in->sin6_port); + iface = SW_IPV6_ADDRESS; + + break; + } +#endif + default: + errno = ENETUNREACH; + return -1; + } + + if (prt == 0) { + errno = EINVAL; + return -1; + } + + if (is_bcast) { + snprintf(un->sun_path, sizeof(un->sun_path), "%s/EINVAL", + socket_wrapper_dir()); + /* the caller need to do more processing */ + return 0; + } + + snprintf(un->sun_path, sizeof(un->sun_path), "%s/"SOCKET_FORMAT, + socket_wrapper_dir(), type, iface, prt); + + return 0; +} + +static int convert_in_un_alloc(struct socket_info *si, const struct sockaddr *inaddr, struct sockaddr_un *un, + int *bcast) +{ + char type = '\0'; + unsigned int prt; + unsigned int iface; + struct stat st; + int is_bcast = 0; + + if (bcast) *bcast = 0; + + switch (si->family) { + case AF_INET: { + const struct sockaddr_in *in = + (const struct sockaddr_in *)inaddr; + unsigned int addr = ntohl(in->sin_addr.s_addr); + char u_type = '\0'; + char d_type = '\0'; + char b_type = '\0'; + char a_type = '\0'; + + prt = ntohs(in->sin_port); + + switch (si->type) { + case SOCK_STREAM: + u_type = SOCKET_TYPE_CHAR_TCP; + d_type = SOCKET_TYPE_CHAR_TCP; + break; + case SOCK_DGRAM: + u_type = SOCKET_TYPE_CHAR_UDP; + d_type = SOCKET_TYPE_CHAR_UDP; + a_type = SOCKET_TYPE_CHAR_UDP; + b_type = SOCKET_TYPE_CHAR_UDP; + break; + } + + if (addr == 0) { + /* 0.0.0.0 */ + is_bcast = 0; + type = d_type; + iface = socket_wrapper_default_iface(); + } else if (a_type && addr == 0xFFFFFFFF) { + /* 255.255.255.255 only udp */ + is_bcast = 2; + type = a_type; + iface = socket_wrapper_default_iface(); + } else if (b_type && addr == 0x7FFFFFFF) { + /* 127.255.255.255 only udp */ + is_bcast = 1; + type = b_type; + iface = socket_wrapper_default_iface(); + } else if ((addr & 0xFFFFFF00) == 0x7F000000) { + /* 127.0.0.X */ + is_bcast = 0; + type = u_type; + iface = (addr & 0x000000FF); + } else { + errno = EADDRNOTAVAIL; + return -1; + } + break; + } +#ifdef HAVE_IPV6 + case AF_INET6: { + const struct sockaddr_in6 *in = + (const struct sockaddr_in6 *)inaddr; + + switch (si->type) { + case SOCK_STREAM: + type = SOCKET_TYPE_CHAR_TCP_V6; + break; + case SOCK_DGRAM: + type = SOCKET_TYPE_CHAR_UDP_V6; + break; + } + + /* XXX no multicast/broadcast */ + + prt = ntohs(in->sin6_port); + iface = SW_IPV6_ADDRESS; + + break; + } +#endif + default: + errno = ENETUNREACH; + return -1; + } + + + if (bcast) *bcast = is_bcast; + + if (prt == 0) { + /* handle auto-allocation of ephemeral ports */ + for (prt = 5001; prt < 10000; prt++) { + snprintf(un->sun_path, sizeof(un->sun_path), "%s/"SOCKET_FORMAT, + socket_wrapper_dir(), type, iface, prt); + if (stat(un->sun_path, &st) == 0) continue; + + set_port(si->family, prt, si->myname); + break; + } + if (prt == 10000) { + errno = ENFILE; + return -1; + } + } + + snprintf(un->sun_path, sizeof(un->sun_path), "%s/"SOCKET_FORMAT, + socket_wrapper_dir(), type, iface, prt); + return 0; +} + +static struct socket_info *find_socket_info(int fd) +{ + struct socket_info *i; + for (i = sockets; i; i = i->next) { + if (i->fd == fd) + return i; + } + + return NULL; +} + +static int sockaddr_convert_to_un(struct socket_info *si, const struct sockaddr *in_addr, socklen_t in_len, + struct sockaddr_un *out_addr, int alloc_sock, int *bcast) +{ + if (!out_addr) + return 0; + + out_addr->sun_family = AF_UNIX; + + switch (in_addr->sa_family) { + case AF_INET: +#ifdef HAVE_IPV6 + case AF_INET6: +#endif + switch (si->type) { + case SOCK_STREAM: + case SOCK_DGRAM: + break; + default: + errno = ESOCKTNOSUPPORT; + return -1; + } + if (alloc_sock) { + return convert_in_un_alloc(si, in_addr, out_addr, bcast); + } else { + return convert_in_un_remote(si, in_addr, out_addr, bcast); + } + default: + break; + } + + errno = EAFNOSUPPORT; + return -1; +} + +static int sockaddr_convert_from_un(const struct socket_info *si, + const struct sockaddr_un *in_addr, + socklen_t un_addrlen, + int family, + struct sockaddr *out_addr, + socklen_t *out_addrlen) +{ + if (out_addr == NULL || out_addrlen == NULL) + return 0; + + if (un_addrlen == 0) { + *out_addrlen = 0; + return 0; + } + + switch (family) { + case AF_INET: +#ifdef HAVE_IPV6 + case AF_INET6: +#endif + switch (si->type) { + case SOCK_STREAM: + case SOCK_DGRAM: + break; + default: + errno = ESOCKTNOSUPPORT; + return -1; + } + return convert_un_in(in_addr, out_addr, out_addrlen); + default: + break; + } + + errno = EAFNOSUPPORT; + return -1; +} + +enum swrap_packet_type { + SWRAP_CONNECT_SEND, + SWRAP_CONNECT_UNREACH, + SWRAP_CONNECT_RECV, + SWRAP_CONNECT_ACK, + SWRAP_ACCEPT_SEND, + SWRAP_ACCEPT_RECV, + SWRAP_ACCEPT_ACK, + SWRAP_RECVFROM, + SWRAP_SENDTO, + SWRAP_SENDTO_UNREACH, + SWRAP_PENDING_RST, + SWRAP_RECV, + SWRAP_RECV_RST, + SWRAP_SEND, + SWRAP_SEND_RST, + SWRAP_CLOSE_SEND, + SWRAP_CLOSE_RECV, + SWRAP_CLOSE_ACK +}; + +struct swrap_file_hdr { + uint32_t magic; + uint16_t version_major; + uint16_t version_minor; + int32_t timezone; + uint32_t sigfigs; + uint32_t frame_max_len; +#define SWRAP_FRAME_LENGTH_MAX 0xFFFF + uint32_t link_type; +}; +#define SWRAP_FILE_HDR_SIZE 24 + +struct swrap_packet { + struct { + uint32_t seconds; + uint32_t micro_seconds; + uint32_t recorded_length; + uint32_t full_length; + } frame; +#define SWRAP_PACKET__FRAME_SIZE 16 + + struct { + struct { + uint8_t ver_hdrlen; + uint8_t tos; + uint16_t packet_length; + uint16_t identification; + uint8_t flags; + uint8_t fragment; + uint8_t ttl; + uint8_t protocol; + uint16_t hdr_checksum; + uint32_t src_addr; + uint32_t dest_addr; + } hdr; +#define SWRAP_PACKET__IP_HDR_SIZE 20 + + union { + struct { + uint16_t source_port; + uint16_t dest_port; + uint32_t seq_num; + uint32_t ack_num; + uint8_t hdr_length; + uint8_t control; + uint16_t window; + uint16_t checksum; + uint16_t urg; + } tcp; +#define SWRAP_PACKET__IP_P_TCP_SIZE 20 + struct { + uint16_t source_port; + uint16_t dest_port; + uint16_t length; + uint16_t checksum; + } udp; +#define SWRAP_PACKET__IP_P_UDP_SIZE 8 + struct { + uint8_t type; + uint8_t code; + uint16_t checksum; + uint32_t unused; + } icmp; +#define SWRAP_PACKET__IP_P_ICMP_SIZE 8 + } p; + } ip; +}; +#define SWRAP_PACKET_SIZE 56 + +static const char *socket_wrapper_pcap_file(void) +{ + static int initialized = 0; + static const char *s = NULL; + static const struct swrap_file_hdr h = { 0, }; + static const struct swrap_packet p = { { 0, }, { { 0, }, { { 0, } } } }; + + if (initialized == 1) { + return s; + } + initialized = 1; + + /* + * TODO: don't use the structs use plain buffer offsets + * and PUSH_U8(), PUSH_U16() and PUSH_U32() + * + * for now make sure we disable PCAP support + * if the struct has alignment! + */ + if (sizeof(h) != SWRAP_FILE_HDR_SIZE) { + return NULL; + } + if (sizeof(p) != SWRAP_PACKET_SIZE) { + return NULL; + } + if (sizeof(p.frame) != SWRAP_PACKET__FRAME_SIZE) { + return NULL; + } + if (sizeof(p.ip.hdr) != SWRAP_PACKET__IP_HDR_SIZE) { + return NULL; + } + if (sizeof(p.ip.p.tcp) != SWRAP_PACKET__IP_P_TCP_SIZE) { + return NULL; + } + if (sizeof(p.ip.p.udp) != SWRAP_PACKET__IP_P_UDP_SIZE) { + return NULL; + } + if (sizeof(p.ip.p.icmp) != SWRAP_PACKET__IP_P_ICMP_SIZE) { + return NULL; + } + + s = getenv("SOCKET_WRAPPER_PCAP_FILE"); + if (s == NULL) { + return NULL; + } + if (strncmp(s, "./", 2) == 0) { + s += 2; + } + return s; +} + +static struct swrap_packet *swrap_packet_init(struct timeval *tval, + const struct sockaddr_in *src_addr, + const struct sockaddr_in *dest_addr, + int socket_type, + const unsigned char *payload, + size_t payload_len, + unsigned long tcp_seq, + unsigned long tcp_ack, + unsigned char tcp_ctl, + int unreachable, + size_t *_packet_len) +{ + struct swrap_packet *ret; + struct swrap_packet *packet; + size_t packet_len; + size_t alloc_len; + size_t nonwire_len = sizeof(packet->frame); + size_t wire_hdr_len = 0; + size_t wire_len = 0; + size_t icmp_hdr_len = 0; + size_t icmp_truncate_len = 0; + unsigned char protocol = 0, icmp_protocol = 0; + unsigned short src_port = src_addr->sin_port; + unsigned short dest_port = dest_addr->sin_port; + + switch (socket_type) { + case SOCK_STREAM: + protocol = 0x06; /* TCP */ + wire_hdr_len = sizeof(packet->ip.hdr) + sizeof(packet->ip.p.tcp); + wire_len = wire_hdr_len + payload_len; + break; + + case SOCK_DGRAM: + protocol = 0x11; /* UDP */ + wire_hdr_len = sizeof(packet->ip.hdr) + sizeof(packet->ip.p.udp); + wire_len = wire_hdr_len + payload_len; + break; + + default: + return NULL; + } + + if (unreachable) { + icmp_protocol = protocol; + protocol = 0x01; /* ICMP */ + if (wire_len > 64 ) { + icmp_truncate_len = wire_len - 64; + } + icmp_hdr_len = sizeof(packet->ip.hdr) + sizeof(packet->ip.p.icmp); + wire_hdr_len += icmp_hdr_len; + wire_len += icmp_hdr_len; + } + + packet_len = nonwire_len + wire_len; + alloc_len = packet_len; + if (alloc_len < sizeof(struct swrap_packet)) { + alloc_len = sizeof(struct swrap_packet); + } + ret = (struct swrap_packet *)malloc(alloc_len); + if (!ret) return NULL; + + packet = ret; + + packet->frame.seconds = tval->tv_sec; + packet->frame.micro_seconds = tval->tv_usec; + packet->frame.recorded_length = wire_len - icmp_truncate_len; + packet->frame.full_length = wire_len - icmp_truncate_len; + + packet->ip.hdr.ver_hdrlen = 0x45; /* version 4 and 5 * 32 bit words */ + packet->ip.hdr.tos = 0x00; + packet->ip.hdr.packet_length = htons(wire_len - icmp_truncate_len); + packet->ip.hdr.identification = htons(0xFFFF); + packet->ip.hdr.flags = 0x40; /* BIT 1 set - means don't fraqment */ + packet->ip.hdr.fragment = htons(0x0000); + packet->ip.hdr.ttl = 0xFF; + packet->ip.hdr.protocol = protocol; + packet->ip.hdr.hdr_checksum = htons(0x0000); + packet->ip.hdr.src_addr = src_addr->sin_addr.s_addr; + packet->ip.hdr.dest_addr = dest_addr->sin_addr.s_addr; + + if (unreachable) { + packet->ip.p.icmp.type = 0x03; /* destination unreachable */ + packet->ip.p.icmp.code = 0x01; /* host unreachable */ + packet->ip.p.icmp.checksum = htons(0x0000); + packet->ip.p.icmp.unused = htonl(0x00000000); + + /* set the ip header in the ICMP payload */ + packet = (struct swrap_packet *)(((unsigned char *)ret) + icmp_hdr_len); + packet->ip.hdr.ver_hdrlen = 0x45; /* version 4 and 5 * 32 bit words */ + packet->ip.hdr.tos = 0x00; + packet->ip.hdr.packet_length = htons(wire_len - icmp_hdr_len); + packet->ip.hdr.identification = htons(0xFFFF); + packet->ip.hdr.flags = 0x40; /* BIT 1 set - means don't fraqment */ + packet->ip.hdr.fragment = htons(0x0000); + packet->ip.hdr.ttl = 0xFF; + packet->ip.hdr.protocol = icmp_protocol; + packet->ip.hdr.hdr_checksum = htons(0x0000); + packet->ip.hdr.src_addr = dest_addr->sin_addr.s_addr; + packet->ip.hdr.dest_addr = src_addr->sin_addr.s_addr; + + src_port = dest_addr->sin_port; + dest_port = src_addr->sin_port; + } + + switch (socket_type) { + case SOCK_STREAM: + packet->ip.p.tcp.source_port = src_port; + packet->ip.p.tcp.dest_port = dest_port; + packet->ip.p.tcp.seq_num = htonl(tcp_seq); + packet->ip.p.tcp.ack_num = htonl(tcp_ack); + packet->ip.p.tcp.hdr_length = 0x50; /* 5 * 32 bit words */ + packet->ip.p.tcp.control = tcp_ctl; + packet->ip.p.tcp.window = htons(0x7FFF); + packet->ip.p.tcp.checksum = htons(0x0000); + packet->ip.p.tcp.urg = htons(0x0000); + + break; + + case SOCK_DGRAM: + packet->ip.p.udp.source_port = src_addr->sin_port; + packet->ip.p.udp.dest_port = dest_addr->sin_port; + packet->ip.p.udp.length = htons(8 + payload_len); + packet->ip.p.udp.checksum = htons(0x0000); + + break; + } + + if (payload && payload_len > 0) { + unsigned char *p = (unsigned char *)ret; + p += nonwire_len; + p += wire_hdr_len; + memcpy(p, payload, payload_len); + } + + *_packet_len = packet_len - icmp_truncate_len; + return ret; +} + +static int swrap_get_pcap_fd(const char *fname) +{ + static int fd = -1; + + if (fd != -1) return fd; + + fd = open(fname, O_WRONLY|O_CREAT|O_EXCL|O_APPEND, 0644); + if (fd != -1) { + struct swrap_file_hdr file_hdr; + file_hdr.magic = 0xA1B2C3D4; + file_hdr.version_major = 0x0002; + file_hdr.version_minor = 0x0004; + file_hdr.timezone = 0x00000000; + file_hdr.sigfigs = 0x00000000; + file_hdr.frame_max_len = SWRAP_FRAME_LENGTH_MAX; + file_hdr.link_type = 0x0065; /* 101 RAW IP */ + + write(fd, &file_hdr, sizeof(file_hdr)); + return fd; + } + + fd = open(fname, O_WRONLY|O_APPEND, 0644); + + return fd; +} + +static struct swrap_packet *swrap_marshall_packet(struct socket_info *si, + const struct sockaddr *addr, + enum swrap_packet_type type, + const void *buf, size_t len, + size_t *packet_len) +{ + const struct sockaddr_in *src_addr; + const struct sockaddr_in *dest_addr; + unsigned long tcp_seq = 0; + unsigned long tcp_ack = 0; + unsigned char tcp_ctl = 0; + int unreachable = 0; + + struct timeval tv; + + switch (si->family) { + case AF_INET: + break; + default: + return NULL; + } + + switch (type) { + case SWRAP_CONNECT_SEND: + if (si->type != SOCK_STREAM) return NULL; + + src_addr = (const struct sockaddr_in *)si->myname; + dest_addr = (const struct sockaddr_in *)addr; + + tcp_seq = si->io.pck_snd; + tcp_ack = si->io.pck_rcv; + tcp_ctl = 0x02; /* SYN */ + + si->io.pck_snd += 1; + + break; + + case SWRAP_CONNECT_RECV: + if (si->type != SOCK_STREAM) return NULL; + + dest_addr = (const struct sockaddr_in *)si->myname; + src_addr = (const struct sockaddr_in *)addr; + + tcp_seq = si->io.pck_rcv; + tcp_ack = si->io.pck_snd; + tcp_ctl = 0x12; /** SYN,ACK */ + + si->io.pck_rcv += 1; + + break; + + case SWRAP_CONNECT_UNREACH: + if (si->type != SOCK_STREAM) return NULL; + + dest_addr = (const struct sockaddr_in *)si->myname; + src_addr = (const struct sockaddr_in *)addr; + + /* Unreachable: resend the data of SWRAP_CONNECT_SEND */ + tcp_seq = si->io.pck_snd - 1; + tcp_ack = si->io.pck_rcv; + tcp_ctl = 0x02; /* SYN */ + unreachable = 1; + + break; + + case SWRAP_CONNECT_ACK: + if (si->type != SOCK_STREAM) return NULL; + + src_addr = (const struct sockaddr_in *)si->myname; + dest_addr = (const struct sockaddr_in *)addr; + + tcp_seq = si->io.pck_snd; + tcp_ack = si->io.pck_rcv; + tcp_ctl = 0x10; /* ACK */ + + break; + + case SWRAP_ACCEPT_SEND: + if (si->type != SOCK_STREAM) return NULL; + + dest_addr = (const struct sockaddr_in *)si->myname; + src_addr = (const struct sockaddr_in *)addr; + + tcp_seq = si->io.pck_rcv; + tcp_ack = si->io.pck_snd; + tcp_ctl = 0x02; /* SYN */ + + si->io.pck_rcv += 1; + + break; + + case SWRAP_ACCEPT_RECV: + if (si->type != SOCK_STREAM) return NULL; + + src_addr = (const struct sockaddr_in *)si->myname; + dest_addr = (const struct sockaddr_in *)addr; + + tcp_seq = si->io.pck_snd; + tcp_ack = si->io.pck_rcv; + tcp_ctl = 0x12; /* SYN,ACK */ + + si->io.pck_snd += 1; + + break; + + case SWRAP_ACCEPT_ACK: + if (si->type != SOCK_STREAM) return NULL; + + dest_addr = (const struct sockaddr_in *)si->myname; + src_addr = (const struct sockaddr_in *)addr; + + tcp_seq = si->io.pck_rcv; + tcp_ack = si->io.pck_snd; + tcp_ctl = 0x10; /* ACK */ + + break; + + case SWRAP_SEND: + src_addr = (const struct sockaddr_in *)si->myname; + dest_addr = (const struct sockaddr_in *)si->peername; + + tcp_seq = si->io.pck_snd; + tcp_ack = si->io.pck_rcv; + tcp_ctl = 0x18; /* PSH,ACK */ + + si->io.pck_snd += len; + + break; + + case SWRAP_SEND_RST: + dest_addr = (const struct sockaddr_in *)si->myname; + src_addr = (const struct sockaddr_in *)si->peername; + + if (si->type == SOCK_DGRAM) { + return swrap_marshall_packet(si, si->peername, + SWRAP_SENDTO_UNREACH, + buf, len, packet_len); + } + + tcp_seq = si->io.pck_rcv; + tcp_ack = si->io.pck_snd; + tcp_ctl = 0x14; /** RST,ACK */ + + break; + + case SWRAP_PENDING_RST: + dest_addr = (const struct sockaddr_in *)si->myname; + src_addr = (const struct sockaddr_in *)si->peername; + + if (si->type == SOCK_DGRAM) { + return NULL; + } + + tcp_seq = si->io.pck_rcv; + tcp_ack = si->io.pck_snd; + tcp_ctl = 0x14; /* RST,ACK */ + + break; + + case SWRAP_RECV: + dest_addr = (const struct sockaddr_in *)si->myname; + src_addr = (const struct sockaddr_in *)si->peername; + + tcp_seq = si->io.pck_rcv; + tcp_ack = si->io.pck_snd; + tcp_ctl = 0x18; /* PSH,ACK */ + + si->io.pck_rcv += len; + + break; + + case SWRAP_RECV_RST: + dest_addr = (const struct sockaddr_in *)si->myname; + src_addr = (const struct sockaddr_in *)si->peername; + + if (si->type == SOCK_DGRAM) { + return NULL; + } + + tcp_seq = si->io.pck_rcv; + tcp_ack = si->io.pck_snd; + tcp_ctl = 0x14; /* RST,ACK */ + + break; + + case SWRAP_SENDTO: + src_addr = (const struct sockaddr_in *)si->myname; + dest_addr = (const struct sockaddr_in *)addr; + + si->io.pck_snd += len; + + break; + + case SWRAP_SENDTO_UNREACH: + dest_addr = (const struct sockaddr_in *)si->myname; + src_addr = (const struct sockaddr_in *)addr; + + unreachable = 1; + + break; + + case SWRAP_RECVFROM: + dest_addr = (const struct sockaddr_in *)si->myname; + src_addr = (const struct sockaddr_in *)addr; + + si->io.pck_rcv += len; + + break; + + case SWRAP_CLOSE_SEND: + if (si->type != SOCK_STREAM) return NULL; + + src_addr = (const struct sockaddr_in *)si->myname; + dest_addr = (const struct sockaddr_in *)si->peername; + + tcp_seq = si->io.pck_snd; + tcp_ack = si->io.pck_rcv; + tcp_ctl = 0x11; /* FIN, ACK */ + + si->io.pck_snd += 1; + + break; + + case SWRAP_CLOSE_RECV: + if (si->type != SOCK_STREAM) return NULL; + + dest_addr = (const struct sockaddr_in *)si->myname; + src_addr = (const struct sockaddr_in *)si->peername; + + tcp_seq = si->io.pck_rcv; + tcp_ack = si->io.pck_snd; + tcp_ctl = 0x11; /* FIN,ACK */ + + si->io.pck_rcv += 1; + + break; + + case SWRAP_CLOSE_ACK: + if (si->type != SOCK_STREAM) return NULL; + + src_addr = (const struct sockaddr_in *)si->myname; + dest_addr = (const struct sockaddr_in *)si->peername; + + tcp_seq = si->io.pck_snd; + tcp_ack = si->io.pck_rcv; + tcp_ctl = 0x10; /* ACK */ + + break; + default: + return NULL; + } + + swrapGetTimeOfDay(&tv); + + return swrap_packet_init(&tv, src_addr, dest_addr, si->type, + (const unsigned char *)buf, len, + tcp_seq, tcp_ack, tcp_ctl, unreachable, + packet_len); +} + +static void swrap_dump_packet(struct socket_info *si, + const struct sockaddr *addr, + enum swrap_packet_type type, + const void *buf, size_t len) +{ + const char *file_name; + struct swrap_packet *packet; + size_t packet_len = 0; + int fd; + + file_name = socket_wrapper_pcap_file(); + if (!file_name) { + return; + } + + packet = swrap_marshall_packet(si, addr, type, buf, len, &packet_len); + if (!packet) { + return; + } + + fd = swrap_get_pcap_fd(file_name); + if (fd != -1) { + write(fd, packet, packet_len); + } + + free(packet); +} + +_PUBLIC_ int swrap_socket(int family, int type, int protocol) +{ + struct socket_info *si; + int fd; + + if (!socket_wrapper_dir()) { + return real_socket(family, type, protocol); + } + + switch (family) { + case AF_INET: +#ifdef HAVE_IPV6 + case AF_INET6: +#endif + break; + case AF_UNIX: + return real_socket(family, type, protocol); + default: + errno = EAFNOSUPPORT; + return -1; + } + + switch (type) { + case SOCK_STREAM: + break; + case SOCK_DGRAM: + break; + default: + errno = EPROTONOSUPPORT; + return -1; + } + + switch (protocol) { + case 0: + break; + case 6: + if (type == SOCK_STREAM) { + break; + } + /*fall through*/ + case 17: + if (type == SOCK_DGRAM) { + break; + } + /*fall through*/ + default: + errno = EPROTONOSUPPORT; + return -1; + } + + fd = real_socket(AF_UNIX, type, 0); + + if (fd == -1) return -1; + + si = (struct socket_info *)calloc(1, sizeof(struct socket_info)); + + si->family = family; + si->type = type; + si->protocol = protocol; + si->fd = fd; + + SWRAP_DLIST_ADD(sockets, si); + + return si->fd; +} + +_PUBLIC_ int swrap_accept(int s, struct sockaddr *addr, socklen_t *addrlen) +{ + struct socket_info *parent_si, *child_si; + int fd; + struct sockaddr_un un_addr; + socklen_t un_addrlen = sizeof(un_addr); + struct sockaddr_un un_my_addr; + socklen_t un_my_addrlen = sizeof(un_my_addr); + struct sockaddr *my_addr; + socklen_t my_addrlen, len; + int ret; + + parent_si = find_socket_info(s); + if (!parent_si) { + return real_accept(s, addr, addrlen); + } + + /* + * assume out sockaddr have the same size as the in parent + * socket family + */ + my_addrlen = socket_length(parent_si->family); + if (my_addrlen <= 0) { + errno = EINVAL; + return -1; + } + + my_addr = (struct sockaddr *)malloc(my_addrlen); + if (my_addr == NULL) { + return -1; + } + + memset(&un_addr, 0, sizeof(un_addr)); + memset(&un_my_addr, 0, sizeof(un_my_addr)); + + ret = real_accept(s, (struct sockaddr *)&un_addr, &un_addrlen); + if (ret == -1) { + free(my_addr); + return ret; + } + + fd = ret; + + len = my_addrlen; + ret = sockaddr_convert_from_un(parent_si, &un_addr, un_addrlen, + parent_si->family, my_addr, &len); + if (ret == -1) { + free(my_addr); + close(fd); + return ret; + } + + child_si = (struct socket_info *)malloc(sizeof(struct socket_info)); + memset(child_si, 0, sizeof(*child_si)); + + child_si->fd = fd; + child_si->family = parent_si->family; + child_si->type = parent_si->type; + child_si->protocol = parent_si->protocol; + child_si->bound = 1; + child_si->is_server = 1; + + child_si->peername_len = len; + child_si->peername = sockaddr_dup(my_addr, len); + + if (addr != NULL && addrlen != NULL) { + *addrlen = len; + if (*addrlen >= len) + memcpy(addr, my_addr, len); + *addrlen = 0; + } + + ret = real_getsockname(fd, (struct sockaddr *)&un_my_addr, &un_my_addrlen); + if (ret == -1) { + free(child_si); + close(fd); + return ret; + } + + len = my_addrlen; + ret = sockaddr_convert_from_un(child_si, &un_my_addr, un_my_addrlen, + child_si->family, my_addr, &len); + if (ret == -1) { + free(child_si); + free(my_addr); + close(fd); + return ret; + } + + child_si->myname_len = len; + child_si->myname = sockaddr_dup(my_addr, len); + free(my_addr); + + SWRAP_DLIST_ADD(sockets, child_si); + + swrap_dump_packet(child_si, addr, SWRAP_ACCEPT_SEND, NULL, 0); + swrap_dump_packet(child_si, addr, SWRAP_ACCEPT_RECV, NULL, 0); + swrap_dump_packet(child_si, addr, SWRAP_ACCEPT_ACK, NULL, 0); + + return fd; +} + +static int autobind_start_init; +static int autobind_start; + +/* using sendto() or connect() on an unbound socket would give the + recipient no way to reply, as unlike UDP and TCP, a unix domain + socket can't auto-assign emphemeral port numbers, so we need to + assign it here */ +static int swrap_auto_bind(struct socket_info *si) +{ + struct sockaddr_un un_addr; + int i; + char type; + int ret; + int port; + struct stat st; + + if (autobind_start_init != 1) { + autobind_start_init = 1; + autobind_start = getpid(); + autobind_start %= 50000; + autobind_start += 10000; + } + + un_addr.sun_family = AF_UNIX; + + switch (si->family) { + case AF_INET: { + struct sockaddr_in in; + + switch (si->type) { + case SOCK_STREAM: + type = SOCKET_TYPE_CHAR_TCP; + break; + case SOCK_DGRAM: + type = SOCKET_TYPE_CHAR_UDP; + break; + default: + errno = ESOCKTNOSUPPORT; + return -1; + } + + memset(&in, 0, sizeof(in)); + in.sin_family = AF_INET; + in.sin_addr.s_addr = htonl(127<<24 | + socket_wrapper_default_iface()); + + si->myname_len = sizeof(in); + si->myname = sockaddr_dup(&in, si->myname_len); + break; + } +#ifdef HAVE_IPV6 + case AF_INET6: { + struct sockaddr_in6 in6; + + switch (si->type) { + case SOCK_STREAM: + type = SOCKET_TYPE_CHAR_TCP_V6; + break; + case SOCK_DGRAM: + type = SOCKET_TYPE_CHAR_UDP_V6; + break; + default: + errno = ESOCKTNOSUPPORT; + return -1; + } + + memset(&in6, 0, sizeof(in6)); + in6.sin6_family = AF_INET6; + in6.sin6_addr.s6_addr[0] = SW_IPV6_ADDRESS; + si->myname_len = sizeof(in6); + si->myname = sockaddr_dup(&in6, si->myname_len); + break; + } +#endif + default: + errno = ESOCKTNOSUPPORT; + return -1; + } + + if (autobind_start > 60000) { + autobind_start = 10000; + } + + for (i=0;i<1000;i++) { + port = autobind_start + i; + snprintf(un_addr.sun_path, sizeof(un_addr.sun_path), + "%s/"SOCKET_FORMAT, socket_wrapper_dir(), + type, socket_wrapper_default_iface(), port); + if (stat(un_addr.sun_path, &st) == 0) continue; + + ret = real_bind(si->fd, (struct sockaddr *)&un_addr, sizeof(un_addr)); + if (ret == -1) return ret; + + si->tmp_path = strdup(un_addr.sun_path); + si->bound = 1; + autobind_start = port + 1; + break; + } + if (i == 1000) { + errno = ENFILE; + return -1; + } + + set_port(si->family, port, si->myname); + + return 0; +} + + +_PUBLIC_ int swrap_connect(int s, const struct sockaddr *serv_addr, socklen_t addrlen) +{ + int ret; + struct sockaddr_un un_addr; + struct socket_info *si = find_socket_info(s); + + if (!si) { + return real_connect(s, serv_addr, addrlen); + } + + if (si->bound == 0) { + ret = swrap_auto_bind(si); + if (ret == -1) return -1; + } + + if (si->family != serv_addr->sa_family) { + errno = EINVAL; + return -1; + } + + ret = sockaddr_convert_to_un(si, (const struct sockaddr *)serv_addr, addrlen, &un_addr, 0, NULL); + if (ret == -1) return -1; + + swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_SEND, NULL, 0); + + ret = real_connect(s, (struct sockaddr *)&un_addr, + sizeof(struct sockaddr_un)); + + /* to give better errors */ + if (ret == -1 && errno == ENOENT) { + errno = EHOSTUNREACH; + } + + if (ret == 0) { + si->peername_len = addrlen; + si->peername = sockaddr_dup(serv_addr, addrlen); + + swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_RECV, NULL, 0); + swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_ACK, NULL, 0); + } else { + swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_UNREACH, NULL, 0); + } + + return ret; +} + +_PUBLIC_ int swrap_bind(int s, const struct sockaddr *myaddr, socklen_t addrlen) +{ + int ret; + struct sockaddr_un un_addr; + struct socket_info *si = find_socket_info(s); + + if (!si) { + return real_bind(s, myaddr, addrlen); + } + + si->myname_len = addrlen; + si->myname = sockaddr_dup(myaddr, addrlen); + + ret = sockaddr_convert_to_un(si, (const struct sockaddr *)myaddr, addrlen, &un_addr, 1, &si->bcast); + if (ret == -1) return -1; + + unlink(un_addr.sun_path); + + ret = real_bind(s, (struct sockaddr *)&un_addr, + sizeof(struct sockaddr_un)); + + if (ret == 0) { + si->bound = 1; + } + + return ret; +} + +_PUBLIC_ int swrap_listen(int s, int backlog) +{ + int ret; + struct socket_info *si = find_socket_info(s); + + if (!si) { + return real_listen(s, backlog); + } + + ret = real_listen(s, backlog); + + return ret; +} + +_PUBLIC_ int swrap_getpeername(int s, struct sockaddr *name, socklen_t *addrlen) +{ + struct socket_info *si = find_socket_info(s); + + if (!si) { + return real_getpeername(s, name, addrlen); + } + + if (!si->peername) + { + errno = ENOTCONN; + return -1; + } + + memcpy(name, si->peername, si->peername_len); + *addrlen = si->peername_len; + + return 0; +} + +_PUBLIC_ int swrap_getsockname(int s, struct sockaddr *name, socklen_t *addrlen) +{ + struct socket_info *si = find_socket_info(s); + + if (!si) { + return real_getsockname(s, name, addrlen); + } + + memcpy(name, si->myname, si->myname_len); + *addrlen = si->myname_len; + + return 0; +} + +_PUBLIC_ int swrap_getsockopt(int s, int level, int optname, void *optval, socklen_t *optlen) +{ + struct socket_info *si = find_socket_info(s); + + if (!si) { + return real_getsockopt(s, level, optname, optval, optlen); + } + + if (level == SOL_SOCKET) { + return real_getsockopt(s, level, optname, optval, optlen); + } + + errno = ENOPROTOOPT; + return -1; +} + +_PUBLIC_ int swrap_setsockopt(int s, int level, int optname, const void *optval, socklen_t optlen) +{ + struct socket_info *si = find_socket_info(s); + + if (!si) { + return real_setsockopt(s, level, optname, optval, optlen); + } + + if (level == SOL_SOCKET) { + return real_setsockopt(s, level, optname, optval, optlen); + } + + switch (si->family) { + case AF_INET: + return 0; + default: + errno = ENOPROTOOPT; + return -1; + } +} + +_PUBLIC_ ssize_t swrap_recvfrom(int s, void *buf, size_t len, int flags, struct sockaddr *from, socklen_t *fromlen) +{ + struct sockaddr_un un_addr; + socklen_t un_addrlen = sizeof(un_addr); + int ret; + struct socket_info *si = find_socket_info(s); + + if (!si) { + return real_recvfrom(s, buf, len, flags, from, fromlen); + } + + len = MIN(len, 1500); + + /* irix 6.4 forgets to null terminate the sun_path string :-( */ + memset(&un_addr, 0, sizeof(un_addr)); + ret = real_recvfrom(s, buf, len, flags, (struct sockaddr *)&un_addr, &un_addrlen); + if (ret == -1) + return ret; + + if (sockaddr_convert_from_un(si, &un_addr, un_addrlen, + si->family, from, fromlen) == -1) { + return -1; + } + + swrap_dump_packet(si, from, SWRAP_RECVFROM, buf, ret); + + return ret; +} + + +_PUBLIC_ ssize_t swrap_sendto(int s, const void *buf, size_t len, int flags, const struct sockaddr *to, socklen_t tolen) +{ + struct sockaddr_un un_addr; + int ret; + struct socket_info *si = find_socket_info(s); + int bcast = 0; + + if (!si) { + return real_sendto(s, buf, len, flags, to, tolen); + } + + len = MIN(len, 1500); + + switch (si->type) { + case SOCK_STREAM: + ret = real_send(s, buf, len, flags); + break; + case SOCK_DGRAM: + if (si->bound == 0) { + ret = swrap_auto_bind(si); + if (ret == -1) return -1; + } + + ret = sockaddr_convert_to_un(si, to, tolen, &un_addr, 0, &bcast); + if (ret == -1) return -1; + + if (bcast) { + struct stat st; + unsigned int iface; + unsigned int prt = ntohs(((const struct sockaddr_in *)to)->sin_port); + char type; + + type = SOCKET_TYPE_CHAR_UDP; + + for(iface=0; iface <= MAX_WRAPPED_INTERFACES; iface++) { + snprintf(un_addr.sun_path, sizeof(un_addr.sun_path), "%s/"SOCKET_FORMAT, + socket_wrapper_dir(), type, iface, prt); + if (stat(un_addr.sun_path, &st) != 0) continue; + + /* ignore the any errors in broadcast sends */ + real_sendto(s, buf, len, flags, (struct sockaddr *)&un_addr, sizeof(un_addr)); + } + + swrap_dump_packet(si, to, SWRAP_SENDTO, buf, len); + + return len; + } + + ret = real_sendto(s, buf, len, flags, (struct sockaddr *)&un_addr, sizeof(un_addr)); + break; + default: + ret = -1; + errno = EHOSTUNREACH; + break; + } + + /* to give better errors */ + if (ret == -1 && errno == ENOENT) { + errno = EHOSTUNREACH; + } + + if (ret == -1) { + swrap_dump_packet(si, to, SWRAP_SENDTO, buf, len); + swrap_dump_packet(si, to, SWRAP_SENDTO_UNREACH, buf, len); + } else { + swrap_dump_packet(si, to, SWRAP_SENDTO, buf, ret); + } + + return ret; +} + +_PUBLIC_ int swrap_ioctl(int s, int r, void *p) +{ + int ret; + struct socket_info *si = find_socket_info(s); + int value; + + if (!si) { + return real_ioctl(s, r, p); + } + + ret = real_ioctl(s, r, p); + + switch (r) { + case FIONREAD: + value = *((int *)p); + if (ret == -1 && errno != EAGAIN && errno != ENOBUFS) { + swrap_dump_packet(si, NULL, SWRAP_PENDING_RST, NULL, 0); + } else if (value == 0) { /* END OF FILE */ + swrap_dump_packet(si, NULL, SWRAP_PENDING_RST, NULL, 0); + } + break; + } + + return ret; +} + +_PUBLIC_ ssize_t swrap_recv(int s, void *buf, size_t len, int flags) +{ + int ret; + struct socket_info *si = find_socket_info(s); + + if (!si) { + return real_recv(s, buf, len, flags); + } + + len = MIN(len, 1500); + + ret = real_recv(s, buf, len, flags); + if (ret == -1 && errno != EAGAIN && errno != ENOBUFS) { + swrap_dump_packet(si, NULL, SWRAP_RECV_RST, NULL, 0); + } else if (ret == 0) { /* END OF FILE */ + swrap_dump_packet(si, NULL, SWRAP_RECV_RST, NULL, 0); + } else { + swrap_dump_packet(si, NULL, SWRAP_RECV, buf, ret); + } + + return ret; +} + + +_PUBLIC_ ssize_t swrap_send(int s, const void *buf, size_t len, int flags) +{ + int ret; + struct socket_info *si = find_socket_info(s); + + if (!si) { + return real_send(s, buf, len, flags); + } + + len = MIN(len, 1500); + + ret = real_send(s, buf, len, flags); + + if (ret == -1) { + swrap_dump_packet(si, NULL, SWRAP_SEND, buf, len); + swrap_dump_packet(si, NULL, SWRAP_SEND_RST, NULL, 0); + } else { + swrap_dump_packet(si, NULL, SWRAP_SEND, buf, ret); + } + + return ret; +} + +_PUBLIC_ int swrap_close(int fd) +{ + struct socket_info *si = find_socket_info(fd); + int ret; + + if (!si) { + return real_close(fd); + } + + SWRAP_DLIST_REMOVE(sockets, si); + + if (si->myname && si->peername) { + swrap_dump_packet(si, NULL, SWRAP_CLOSE_SEND, NULL, 0); + } + + ret = real_close(fd); + + if (si->myname && si->peername) { + swrap_dump_packet(si, NULL, SWRAP_CLOSE_RECV, NULL, 0); + swrap_dump_packet(si, NULL, SWRAP_CLOSE_ACK, NULL, 0); + } + + if (si->path) free(si->path); + if (si->myname) free(si->myname); + if (si->peername) free(si->peername); + if (si->tmp_path) { + unlink(si->tmp_path); + free(si->tmp_path); + } + free(si); + + return ret; +} diff --git a/socket_wrapper/socket_wrapper.h b/socket_wrapper/socket_wrapper.h new file mode 100644 index 0000000000..cc8b937608 --- /dev/null +++ b/socket_wrapper/socket_wrapper.h @@ -0,0 +1,136 @@ +/* + * Copyright (C) Jelmer Vernooij 2005 + * Copyright (C) Stefan Metzmacher 2006 + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the author nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ + +#ifndef __SOCKET_WRAPPER_H__ +#define __SOCKET_WRAPPER_H__ + +const char *socket_wrapper_dir(void); +unsigned int socket_wrapper_default_iface(void); +int swrap_socket(int family, int type, int protocol); +int swrap_accept(int s, struct sockaddr *addr, socklen_t *addrlen); +int swrap_connect(int s, const struct sockaddr *serv_addr, socklen_t addrlen); +int swrap_bind(int s, const struct sockaddr *myaddr, socklen_t addrlen); +int swrap_listen(int s, int backlog); +int swrap_getpeername(int s, struct sockaddr *name, socklen_t *addrlen); +int swrap_getsockname(int s, struct sockaddr *name, socklen_t *addrlen); +int swrap_getsockopt(int s, int level, int optname, void *optval, socklen_t *optlen); +int swrap_setsockopt(int s, int level, int optname, const void *optval, socklen_t optlen); +ssize_t swrap_recvfrom(int s, void *buf, size_t len, int flags, struct sockaddr *from, socklen_t *fromlen); +ssize_t swrap_sendto(int s, const void *buf, size_t len, int flags, const struct sockaddr *to, socklen_t tolen); +int swrap_ioctl(int s, int req, void *ptr); +ssize_t swrap_recv(int s, void *buf, size_t len, int flags); +ssize_t swrap_send(int s, const void *buf, size_t len, int flags); +int swrap_close(int); + +#ifdef SOCKET_WRAPPER_REPLACE + +#ifdef accept +#undef accept +#endif +#define accept(s,addr,addrlen) swrap_accept(s,addr,addrlen) + +#ifdef connect +#undef connect +#endif +#define connect(s,serv_addr,addrlen) swrap_connect(s,serv_addr,addrlen) + +#ifdef bind +#undef bind +#endif +#define bind(s,myaddr,addrlen) swrap_bind(s,myaddr,addrlen) + +#ifdef listen +#undef listen +#endif +#define listen(s,blog) swrap_listen(s,blog) + +#ifdef getpeername +#undef getpeername +#endif +#define getpeername(s,name,addrlen) swrap_getpeername(s,name,addrlen) + +#ifdef getsockname +#undef getsockname +#endif +#define getsockname(s,name,addrlen) swrap_getsockname(s,name,addrlen) + +#ifdef getsockopt +#undef getsockopt +#endif +#define getsockopt(s,level,optname,optval,optlen) swrap_getsockopt(s,level,optname,optval,optlen) + +#ifdef setsockopt +#undef setsockopt +#endif +#define setsockopt(s,level,optname,optval,optlen) swrap_setsockopt(s,level,optname,optval,optlen) + +#ifdef recvfrom +#undef recvfrom +#endif +#define recvfrom(s,buf,len,flags,from,fromlen) swrap_recvfrom(s,buf,len,flags,from,fromlen) + +#ifdef sendto +#undef sendto +#endif +#define sendto(s,buf,len,flags,to,tolen) swrap_sendto(s,buf,len,flags,to,tolen) + +#ifdef ioctl +#undef ioctl +#endif +#define ioctl(s,req,ptr) swrap_ioctl(s,req,ptr) + +#ifdef recv +#undef recv +#endif +#define recv(s,buf,len,flags) swrap_recv(s,buf,len,flags) + +#ifdef send +#undef send +#endif +#define send(s,buf,len,flags) swrap_send(s,buf,len,flags) + +#ifdef socket +#undef socket +#endif +#define socket(domain,type,protocol) swrap_socket(domain,type,protocol) + +#ifdef close +#undef close +#endif +#define close(s) swrap_close(s) +#endif + + +#endif /* __SOCKET_WRAPPER_H__ */ diff --git a/socket_wrapper/testsuite.c b/socket_wrapper/testsuite.c new file mode 100644 index 0000000000..8877418e4c --- /dev/null +++ b/socket_wrapper/testsuite.c @@ -0,0 +1,105 @@ +/* + Unix SMB/CIFS implementation. + + local testing of the socket wrapper + + Copyright (C) Jelmer Vernooij 2007 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +#include "includes.h" +#include "system/network.h" +#include "lib/socket_wrapper/socket_wrapper.h" +#include "torture/torture.h" + +static char *old_dir = NULL; +static char *old_iface = NULL; + +static void backup_env(void) +{ + old_dir = getenv("SOCKET_WRAPPER_DIR"); + old_iface = getenv("SOCKET_WRAPPER_DEFAULT_IFACE"); +} + +static void restore_env(void) +{ + if (old_dir == NULL) + unsetenv("SOCKET_WRAPPER_DIR"); + else + setenv("SOCKET_WRAPPER_DIR", old_dir, 1); + if (old_iface == NULL) + unsetenv("SOCKET_WRAPPER_DEFAULT_IFACE"); + else + setenv("SOCKET_WRAPPER_DEFAULT_IFACE", old_iface, 1); +} + +static bool test_socket_wrapper_dir(struct torture_context *tctx) +{ + backup_env(); + + setenv("SOCKET_WRAPPER_DIR", "foo", 1); + torture_assert_str_equal(tctx, socket_wrapper_dir(), "foo", "setting failed"); + setenv("SOCKET_WRAPPER_DIR", "./foo", 1); + torture_assert_str_equal(tctx, socket_wrapper_dir(), "foo", "setting failed"); + unsetenv("SOCKET_WRAPPER_DIR"); + torture_assert_str_equal(tctx, socket_wrapper_dir(), NULL, "resetting failed"); + + restore_env(); + + return true; +} + +static bool test_swrap_socket(struct torture_context *tctx) +{ + backup_env(); + setenv("SOCKET_WRAPPER_DIR", "foo", 1); + + torture_assert_int_equal(tctx, swrap_socket(1337, 1337, 0), -1, "unknown address family fails"); + torture_assert_int_equal(tctx, errno, EAFNOSUPPORT, "correct errno set"); + torture_assert_int_equal(tctx, swrap_socket(AF_INET, 1337, 0), -1, "unknown type fails"); + torture_assert_int_equal(tctx, errno, EPROTONOSUPPORT, "correct errno set"); + torture_assert_int_equal(tctx, swrap_socket(AF_INET, SOCK_DGRAM, 10), -1, "unknown protocol fails"); + torture_assert_int_equal(tctx, errno, EPROTONOSUPPORT, "correct errno set"); + + restore_env(); + + return true; +} + +unsigned int socket_wrapper_default_iface(void); +static bool test_socket_wrapper_default_iface(struct torture_context *tctx) +{ + backup_env(); + unsetenv("SOCKET_WRAPPER_DEFAULT_IFACE"); + torture_assert_int_equal(tctx, socket_wrapper_default_iface(), 1, "unset"); + setenv("SOCKET_WRAPPER_DEFAULT_IFACE", "2", 1); + torture_assert_int_equal(tctx, socket_wrapper_default_iface(), 2, "unset"); + setenv("SOCKET_WRAPPER_DEFAULT_IFACE", "bla", 1); + torture_assert_int_equal(tctx, socket_wrapper_default_iface(), 1, "unset"); + restore_env(); + return true; +} + +struct torture_suite *torture_local_socket_wrapper(TALLOC_CTX *mem_ctx) +{ + struct torture_suite *suite = torture_suite_create(mem_ctx, + "SOCKET-WRAPPER"); + + torture_suite_add_simple_test(suite, "socket_wrapper_dir", test_socket_wrapper_dir); + torture_suite_add_simple_test(suite, "socket", test_swrap_socket); + torture_suite_add_simple_test(suite, "socket_wrapper_default_iface", test_socket_wrapper_default_iface); + + return suite; +} diff --git a/source3/configure.in b/source3/configure.in index d9766e49d0..643c4c8b9e 100644 --- a/source3/configure.in +++ b/source3/configure.in @@ -131,7 +131,7 @@ else CFLAGS="-O" fi -m4_include(lib/socket_wrapper/config.m4) +m4_include(../socket_wrapper/config.m4) m4_include(lib/nss_wrapper/config.m4) m4_include(m4/swat.m4) diff --git a/source3/lib/replace/system/network.h b/source3/lib/replace/system/network.h index 077892a54e..473d79b5f2 100644 --- a/source3/lib/replace/system/network.h +++ b/source3/lib/replace/system/network.h @@ -326,7 +326,7 @@ struct addrinfo { #ifndef SOCKET_WRAPPER_NOT_REPLACE #define SOCKET_WRAPPER_REPLACE #endif -#include "lib/socket_wrapper/socket_wrapper.h" +#include "../socket_wrapper/socket_wrapper.h" #endif #endif diff --git a/source3/lib/socket_wrapper/config.m4 b/source3/lib/socket_wrapper/config.m4 deleted file mode 100644 index f3ffb895a9..0000000000 --- a/source3/lib/socket_wrapper/config.m4 +++ /dev/null @@ -1,22 +0,0 @@ -AC_ARG_ENABLE(socket-wrapper, -[ --enable-socket-wrapper Turn on socket wrapper library (default=no)]) - -DEFAULT_TEST_OPTIONS= -HAVE_SOCKET_WRAPPER=no - -if eval "test x$developer = xyes"; then - enable_socket_wrapper=yes -fi - -if eval "test x$enable_socket_wrapper = xyes"; then - AC_DEFINE(SOCKET_WRAPPER,1,[Use socket wrapper library]) - DEFAULT_TEST_OPTIONS=--socket-wrapper - HAVE_SOCKET_WRAPPER=yes - - # this is only used for samba3 - SOCKET_WRAPPER_OBJS="lib/socket_wrapper/socket_wrapper.o" -fi - -AC_SUBST(DEFAULT_TEST_OPTIONS) -AC_SUBST(HAVE_SOCKET_WRAPPER) -AC_SUBST(SOCKET_WRAPPER_OBJS) diff --git a/source3/lib/socket_wrapper/config.mk b/source3/lib/socket_wrapper/config.mk deleted file mode 100644 index 60cfb3209a..0000000000 --- a/source3/lib/socket_wrapper/config.mk +++ /dev/null @@ -1,8 +0,0 @@ -############################## -# Start SUBSYSTEM SOCKET_WRAPPER -[SUBSYSTEM::SOCKET_WRAPPER] -PRIVATE_DEPENDENCIES = LIBREPLACE_NETWORK -# End SUBSYSTEM SOCKET_WRAPPER -############################## - -SOCKET_WRAPPER_OBJ_FILES = $(socketwrappersrcdir)/socket_wrapper.o diff --git a/source3/lib/socket_wrapper/socket_wrapper.c b/source3/lib/socket_wrapper/socket_wrapper.c deleted file mode 100644 index 33e4b38370..0000000000 --- a/source3/lib/socket_wrapper/socket_wrapper.c +++ /dev/null @@ -1,1841 +0,0 @@ -/* - * Copyright (C) Jelmer Vernooij 2005,2008 - * Copyright (C) Stefan Metzmacher 2006 - * - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * 3. Neither the name of the author nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - */ - -/* - Socket wrapper library. Passes all socket communication over - unix domain sockets if the environment variable SOCKET_WRAPPER_DIR - is set. -*/ - -#ifdef _SAMBA_BUILD_ - -#define SOCKET_WRAPPER_NOT_REPLACE -#include "lib/replace/replace.h" -#include "system/network.h" -#include "system/filesys.h" -#include "system/time.h" - -#else /* _SAMBA_BUILD_ */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#endif - -#ifndef _PUBLIC_ -#define _PUBLIC_ -#endif - -#define SWRAP_DLIST_ADD(list,item) do { \ - if (!(list)) { \ - (item)->prev = NULL; \ - (item)->next = NULL; \ - (list) = (item); \ - } else { \ - (item)->prev = NULL; \ - (item)->next = (list); \ - (list)->prev = (item); \ - (list) = (item); \ - } \ -} while (0) - -#define SWRAP_DLIST_REMOVE(list,item) do { \ - if ((list) == (item)) { \ - (list) = (item)->next; \ - if (list) { \ - (list)->prev = NULL; \ - } \ - } else { \ - if ((item)->prev) { \ - (item)->prev->next = (item)->next; \ - } \ - if ((item)->next) { \ - (item)->next->prev = (item)->prev; \ - } \ - } \ - (item)->prev = NULL; \ - (item)->next = NULL; \ -} while (0) - -/* LD_PRELOAD doesn't work yet, so REWRITE_CALLS is all we support - * for now */ -#define REWRITE_CALLS - -#ifdef REWRITE_CALLS -#define real_accept accept -#define real_connect connect -#define real_bind bind -#define real_listen listen -#define real_getpeername getpeername -#define real_getsockname getsockname -#define real_getsockopt getsockopt -#define real_setsockopt setsockopt -#define real_recvfrom recvfrom -#define real_sendto sendto -#define real_ioctl ioctl -#define real_recv recv -#define real_send send -#define real_socket socket -#define real_close close -#endif - -#ifdef HAVE_GETTIMEOFDAY_TZ -#define swrapGetTimeOfDay(tval) gettimeofday(tval,NULL) -#else -#define swrapGetTimeOfDay(tval) gettimeofday(tval) -#endif - -/* we need to use a very terse format here as IRIX 6.4 silently - truncates names to 16 chars, so if we use a longer name then we - can't tell which port a packet came from with recvfrom() - - with this format we have 8 chars left for the directory name -*/ -#define SOCKET_FORMAT "%c%02X%04X" -#define SOCKET_TYPE_CHAR_TCP 'T' -#define SOCKET_TYPE_CHAR_UDP 'U' -#define SOCKET_TYPE_CHAR_TCP_V6 'X' -#define SOCKET_TYPE_CHAR_UDP_V6 'Y' - -#define MAX_WRAPPED_INTERFACES 16 - -#define SW_IPV6_ADDRESS 1 - -static struct sockaddr *sockaddr_dup(const void *data, socklen_t len) -{ - struct sockaddr *ret = (struct sockaddr *)malloc(len); - memcpy(ret, data, len); - return ret; -} - -static void set_port(int family, int prt, struct sockaddr *addr) -{ - switch (family) { - case AF_INET: - ((struct sockaddr_in *)addr)->sin_port = htons(prt); - break; -#ifdef HAVE_IPV6 - case AF_INET6: - ((struct sockaddr_in6 *)addr)->sin6_port = htons(prt); - break; -#endif - } -} - -static size_t socket_length(int family) -{ - switch (family) { - case AF_INET: - return sizeof(struct sockaddr_in); -#ifdef HAVE_IPV6 - case AF_INET6: - return sizeof(struct sockaddr_in6); -#endif - } - return 0; -} - - - -struct socket_info -{ - int fd; - - int family; - int type; - int protocol; - int bound; - int bcast; - int is_server; - - char *path; - char *tmp_path; - - struct sockaddr *myname; - socklen_t myname_len; - - struct sockaddr *peername; - socklen_t peername_len; - - struct { - unsigned long pck_snd; - unsigned long pck_rcv; - } io; - - struct socket_info *prev, *next; -}; - -static struct socket_info *sockets; - -const char *socket_wrapper_dir(void) -{ - const char *s = getenv("SOCKET_WRAPPER_DIR"); - if (s == NULL) { - return NULL; - } - if (strncmp(s, "./", 2) == 0) { - s += 2; - } - return s; -} - -unsigned int socket_wrapper_default_iface(void) -{ - const char *s = getenv("SOCKET_WRAPPER_DEFAULT_IFACE"); - if (s) { - unsigned int iface; - if (sscanf(s, "%u", &iface) == 1) { - if (iface >= 1 && iface <= MAX_WRAPPED_INTERFACES) { - return iface; - } - } - } - - return 1;/* 127.0.0.1 */ -} - -static int convert_un_in(const struct sockaddr_un *un, struct sockaddr *in, socklen_t *len) -{ - unsigned int iface; - unsigned int prt; - const char *p; - char type; - - p = strrchr(un->sun_path, '/'); - if (p) p++; else p = un->sun_path; - - if (sscanf(p, SOCKET_FORMAT, &type, &iface, &prt) != 3) { - errno = EINVAL; - return -1; - } - - if (iface == 0 || iface > MAX_WRAPPED_INTERFACES) { - errno = EINVAL; - return -1; - } - - if (prt > 0xFFFF) { - errno = EINVAL; - return -1; - } - - switch(type) { - case SOCKET_TYPE_CHAR_TCP: - case SOCKET_TYPE_CHAR_UDP: { - struct sockaddr_in *in2 = (struct sockaddr_in *)in; - - if ((*len) < sizeof(*in2)) { - errno = EINVAL; - return -1; - } - - memset(in2, 0, sizeof(*in2)); - in2->sin_family = AF_INET; - in2->sin_addr.s_addr = htonl((127<<24) | iface); - in2->sin_port = htons(prt); - - *len = sizeof(*in2); - break; - } -#ifdef HAVE_IPV6 - case SOCKET_TYPE_CHAR_TCP_V6: - case SOCKET_TYPE_CHAR_UDP_V6: { - struct sockaddr_in6 *in2 = (struct sockaddr_in6 *)in; - - if ((*len) < sizeof(*in2)) { - errno = EINVAL; - return -1; - } - - memset(in2, 0, sizeof(*in2)); - in2->sin6_family = AF_INET6; - in2->sin6_addr.s6_addr[0] = SW_IPV6_ADDRESS; - in2->sin6_port = htons(prt); - - *len = sizeof(*in2); - break; - } -#endif - default: - errno = EINVAL; - return -1; - } - - return 0; -} - -static int convert_in_un_remote(struct socket_info *si, const struct sockaddr *inaddr, struct sockaddr_un *un, - int *bcast) -{ - char type = '\0'; - unsigned int prt; - unsigned int iface; - int is_bcast = 0; - - if (bcast) *bcast = 0; - - switch (si->family) { - case AF_INET: { - const struct sockaddr_in *in = - (const struct sockaddr_in *)inaddr; - unsigned int addr = ntohl(in->sin_addr.s_addr); - char u_type = '\0'; - char b_type = '\0'; - char a_type = '\0'; - - switch (si->type) { - case SOCK_STREAM: - u_type = SOCKET_TYPE_CHAR_TCP; - break; - case SOCK_DGRAM: - u_type = SOCKET_TYPE_CHAR_UDP; - a_type = SOCKET_TYPE_CHAR_UDP; - b_type = SOCKET_TYPE_CHAR_UDP; - break; - } - - prt = ntohs(in->sin_port); - if (a_type && addr == 0xFFFFFFFF) { - /* 255.255.255.255 only udp */ - is_bcast = 2; - type = a_type; - iface = socket_wrapper_default_iface(); - } else if (b_type && addr == 0x7FFFFFFF) { - /* 127.255.255.255 only udp */ - is_bcast = 1; - type = b_type; - iface = socket_wrapper_default_iface(); - } else if ((addr & 0xFFFFFF00) == 0x7F000000) { - /* 127.0.0.X */ - is_bcast = 0; - type = u_type; - iface = (addr & 0x000000FF); - } else { - errno = ENETUNREACH; - return -1; - } - if (bcast) *bcast = is_bcast; - break; - } -#ifdef HAVE_IPV6 - case AF_INET6: { - const struct sockaddr_in6 *in = - (const struct sockaddr_in6 *)inaddr; - - switch (si->type) { - case SOCK_STREAM: - type = SOCKET_TYPE_CHAR_TCP_V6; - break; - case SOCK_DGRAM: - type = SOCKET_TYPE_CHAR_UDP_V6; - break; - } - - /* XXX no multicast/broadcast */ - - prt = ntohs(in->sin6_port); - iface = SW_IPV6_ADDRESS; - - break; - } -#endif - default: - errno = ENETUNREACH; - return -1; - } - - if (prt == 0) { - errno = EINVAL; - return -1; - } - - if (is_bcast) { - snprintf(un->sun_path, sizeof(un->sun_path), "%s/EINVAL", - socket_wrapper_dir()); - /* the caller need to do more processing */ - return 0; - } - - snprintf(un->sun_path, sizeof(un->sun_path), "%s/"SOCKET_FORMAT, - socket_wrapper_dir(), type, iface, prt); - - return 0; -} - -static int convert_in_un_alloc(struct socket_info *si, const struct sockaddr *inaddr, struct sockaddr_un *un, - int *bcast) -{ - char type = '\0'; - unsigned int prt; - unsigned int iface; - struct stat st; - int is_bcast = 0; - - if (bcast) *bcast = 0; - - switch (si->family) { - case AF_INET: { - const struct sockaddr_in *in = - (const struct sockaddr_in *)inaddr; - unsigned int addr = ntohl(in->sin_addr.s_addr); - char u_type = '\0'; - char d_type = '\0'; - char b_type = '\0'; - char a_type = '\0'; - - prt = ntohs(in->sin_port); - - switch (si->type) { - case SOCK_STREAM: - u_type = SOCKET_TYPE_CHAR_TCP; - d_type = SOCKET_TYPE_CHAR_TCP; - break; - case SOCK_DGRAM: - u_type = SOCKET_TYPE_CHAR_UDP; - d_type = SOCKET_TYPE_CHAR_UDP; - a_type = SOCKET_TYPE_CHAR_UDP; - b_type = SOCKET_TYPE_CHAR_UDP; - break; - } - - if (addr == 0) { - /* 0.0.0.0 */ - is_bcast = 0; - type = d_type; - iface = socket_wrapper_default_iface(); - } else if (a_type && addr == 0xFFFFFFFF) { - /* 255.255.255.255 only udp */ - is_bcast = 2; - type = a_type; - iface = socket_wrapper_default_iface(); - } else if (b_type && addr == 0x7FFFFFFF) { - /* 127.255.255.255 only udp */ - is_bcast = 1; - type = b_type; - iface = socket_wrapper_default_iface(); - } else if ((addr & 0xFFFFFF00) == 0x7F000000) { - /* 127.0.0.X */ - is_bcast = 0; - type = u_type; - iface = (addr & 0x000000FF); - } else { - errno = EADDRNOTAVAIL; - return -1; - } - break; - } -#ifdef HAVE_IPV6 - case AF_INET6: { - const struct sockaddr_in6 *in = - (const struct sockaddr_in6 *)inaddr; - - switch (si->type) { - case SOCK_STREAM: - type = SOCKET_TYPE_CHAR_TCP_V6; - break; - case SOCK_DGRAM: - type = SOCKET_TYPE_CHAR_UDP_V6; - break; - } - - /* XXX no multicast/broadcast */ - - prt = ntohs(in->sin6_port); - iface = SW_IPV6_ADDRESS; - - break; - } -#endif - default: - errno = ENETUNREACH; - return -1; - } - - - if (bcast) *bcast = is_bcast; - - if (prt == 0) { - /* handle auto-allocation of ephemeral ports */ - for (prt = 5001; prt < 10000; prt++) { - snprintf(un->sun_path, sizeof(un->sun_path), "%s/"SOCKET_FORMAT, - socket_wrapper_dir(), type, iface, prt); - if (stat(un->sun_path, &st) == 0) continue; - - set_port(si->family, prt, si->myname); - break; - } - if (prt == 10000) { - errno = ENFILE; - return -1; - } - } - - snprintf(un->sun_path, sizeof(un->sun_path), "%s/"SOCKET_FORMAT, - socket_wrapper_dir(), type, iface, prt); - return 0; -} - -static struct socket_info *find_socket_info(int fd) -{ - struct socket_info *i; - for (i = sockets; i; i = i->next) { - if (i->fd == fd) - return i; - } - - return NULL; -} - -static int sockaddr_convert_to_un(struct socket_info *si, const struct sockaddr *in_addr, socklen_t in_len, - struct sockaddr_un *out_addr, int alloc_sock, int *bcast) -{ - if (!out_addr) - return 0; - - out_addr->sun_family = AF_UNIX; - - switch (in_addr->sa_family) { - case AF_INET: -#ifdef HAVE_IPV6 - case AF_INET6: -#endif - switch (si->type) { - case SOCK_STREAM: - case SOCK_DGRAM: - break; - default: - errno = ESOCKTNOSUPPORT; - return -1; - } - if (alloc_sock) { - return convert_in_un_alloc(si, in_addr, out_addr, bcast); - } else { - return convert_in_un_remote(si, in_addr, out_addr, bcast); - } - default: - break; - } - - errno = EAFNOSUPPORT; - return -1; -} - -static int sockaddr_convert_from_un(const struct socket_info *si, - const struct sockaddr_un *in_addr, - socklen_t un_addrlen, - int family, - struct sockaddr *out_addr, - socklen_t *out_addrlen) -{ - if (out_addr == NULL || out_addrlen == NULL) - return 0; - - if (un_addrlen == 0) { - *out_addrlen = 0; - return 0; - } - - switch (family) { - case AF_INET: -#ifdef HAVE_IPV6 - case AF_INET6: -#endif - switch (si->type) { - case SOCK_STREAM: - case SOCK_DGRAM: - break; - default: - errno = ESOCKTNOSUPPORT; - return -1; - } - return convert_un_in(in_addr, out_addr, out_addrlen); - default: - break; - } - - errno = EAFNOSUPPORT; - return -1; -} - -enum swrap_packet_type { - SWRAP_CONNECT_SEND, - SWRAP_CONNECT_UNREACH, - SWRAP_CONNECT_RECV, - SWRAP_CONNECT_ACK, - SWRAP_ACCEPT_SEND, - SWRAP_ACCEPT_RECV, - SWRAP_ACCEPT_ACK, - SWRAP_RECVFROM, - SWRAP_SENDTO, - SWRAP_SENDTO_UNREACH, - SWRAP_PENDING_RST, - SWRAP_RECV, - SWRAP_RECV_RST, - SWRAP_SEND, - SWRAP_SEND_RST, - SWRAP_CLOSE_SEND, - SWRAP_CLOSE_RECV, - SWRAP_CLOSE_ACK -}; - -struct swrap_file_hdr { - uint32_t magic; - uint16_t version_major; - uint16_t version_minor; - int32_t timezone; - uint32_t sigfigs; - uint32_t frame_max_len; -#define SWRAP_FRAME_LENGTH_MAX 0xFFFF - uint32_t link_type; -}; -#define SWRAP_FILE_HDR_SIZE 24 - -struct swrap_packet { - struct { - uint32_t seconds; - uint32_t micro_seconds; - uint32_t recorded_length; - uint32_t full_length; - } frame; -#define SWRAP_PACKET__FRAME_SIZE 16 - - struct { - struct { - uint8_t ver_hdrlen; - uint8_t tos; - uint16_t packet_length; - uint16_t identification; - uint8_t flags; - uint8_t fragment; - uint8_t ttl; - uint8_t protocol; - uint16_t hdr_checksum; - uint32_t src_addr; - uint32_t dest_addr; - } hdr; -#define SWRAP_PACKET__IP_HDR_SIZE 20 - - union { - struct { - uint16_t source_port; - uint16_t dest_port; - uint32_t seq_num; - uint32_t ack_num; - uint8_t hdr_length; - uint8_t control; - uint16_t window; - uint16_t checksum; - uint16_t urg; - } tcp; -#define SWRAP_PACKET__IP_P_TCP_SIZE 20 - struct { - uint16_t source_port; - uint16_t dest_port; - uint16_t length; - uint16_t checksum; - } udp; -#define SWRAP_PACKET__IP_P_UDP_SIZE 8 - struct { - uint8_t type; - uint8_t code; - uint16_t checksum; - uint32_t unused; - } icmp; -#define SWRAP_PACKET__IP_P_ICMP_SIZE 8 - } p; - } ip; -}; -#define SWRAP_PACKET_SIZE 56 - -static const char *socket_wrapper_pcap_file(void) -{ - static int initialized = 0; - static const char *s = NULL; - static const struct swrap_file_hdr h = { 0, }; - static const struct swrap_packet p = { { 0, }, { { 0, }, { { 0, } } } }; - - if (initialized == 1) { - return s; - } - initialized = 1; - - /* - * TODO: don't use the structs use plain buffer offsets - * and PUSH_U8(), PUSH_U16() and PUSH_U32() - * - * for now make sure we disable PCAP support - * if the struct has alignment! - */ - if (sizeof(h) != SWRAP_FILE_HDR_SIZE) { - return NULL; - } - if (sizeof(p) != SWRAP_PACKET_SIZE) { - return NULL; - } - if (sizeof(p.frame) != SWRAP_PACKET__FRAME_SIZE) { - return NULL; - } - if (sizeof(p.ip.hdr) != SWRAP_PACKET__IP_HDR_SIZE) { - return NULL; - } - if (sizeof(p.ip.p.tcp) != SWRAP_PACKET__IP_P_TCP_SIZE) { - return NULL; - } - if (sizeof(p.ip.p.udp) != SWRAP_PACKET__IP_P_UDP_SIZE) { - return NULL; - } - if (sizeof(p.ip.p.icmp) != SWRAP_PACKET__IP_P_ICMP_SIZE) { - return NULL; - } - - s = getenv("SOCKET_WRAPPER_PCAP_FILE"); - if (s == NULL) { - return NULL; - } - if (strncmp(s, "./", 2) == 0) { - s += 2; - } - return s; -} - -static struct swrap_packet *swrap_packet_init(struct timeval *tval, - const struct sockaddr_in *src_addr, - const struct sockaddr_in *dest_addr, - int socket_type, - const unsigned char *payload, - size_t payload_len, - unsigned long tcp_seqno, - unsigned long tcp_ack, - unsigned char tcp_ctl, - int unreachable, - size_t *_packet_len) -{ - struct swrap_packet *ret; - struct swrap_packet *packet; - size_t packet_len; - size_t alloc_len; - size_t nonwire_len = sizeof(packet->frame); - size_t wire_hdr_len = 0; - size_t wire_len = 0; - size_t icmp_hdr_len = 0; - size_t icmp_truncate_len = 0; - unsigned char protocol = 0, icmp_protocol = 0; - unsigned short src_port = src_addr->sin_port; - unsigned short dest_port = dest_addr->sin_port; - - switch (socket_type) { - case SOCK_STREAM: - protocol = 0x06; /* TCP */ - wire_hdr_len = sizeof(packet->ip.hdr) + sizeof(packet->ip.p.tcp); - wire_len = wire_hdr_len + payload_len; - break; - - case SOCK_DGRAM: - protocol = 0x11; /* UDP */ - wire_hdr_len = sizeof(packet->ip.hdr) + sizeof(packet->ip.p.udp); - wire_len = wire_hdr_len + payload_len; - break; - - default: - return NULL; - } - - if (unreachable) { - icmp_protocol = protocol; - protocol = 0x01; /* ICMP */ - if (wire_len > 64 ) { - icmp_truncate_len = wire_len - 64; - } - icmp_hdr_len = sizeof(packet->ip.hdr) + sizeof(packet->ip.p.icmp); - wire_hdr_len += icmp_hdr_len; - wire_len += icmp_hdr_len; - } - - packet_len = nonwire_len + wire_len; - alloc_len = packet_len; - if (alloc_len < sizeof(struct swrap_packet)) { - alloc_len = sizeof(struct swrap_packet); - } - ret = (struct swrap_packet *)malloc(alloc_len); - if (!ret) return NULL; - - packet = ret; - - packet->frame.seconds = tval->tv_sec; - packet->frame.micro_seconds = tval->tv_usec; - packet->frame.recorded_length = wire_len - icmp_truncate_len; - packet->frame.full_length = wire_len - icmp_truncate_len; - - packet->ip.hdr.ver_hdrlen = 0x45; /* version 4 and 5 * 32 bit words */ - packet->ip.hdr.tos = 0x00; - packet->ip.hdr.packet_length = htons(wire_len - icmp_truncate_len); - packet->ip.hdr.identification = htons(0xFFFF); - packet->ip.hdr.flags = 0x40; /* BIT 1 set - means don't fraqment */ - packet->ip.hdr.fragment = htons(0x0000); - packet->ip.hdr.ttl = 0xFF; - packet->ip.hdr.protocol = protocol; - packet->ip.hdr.hdr_checksum = htons(0x0000); - packet->ip.hdr.src_addr = src_addr->sin_addr.s_addr; - packet->ip.hdr.dest_addr = dest_addr->sin_addr.s_addr; - - if (unreachable) { - packet->ip.p.icmp.type = 0x03; /* destination unreachable */ - packet->ip.p.icmp.code = 0x01; /* host unreachable */ - packet->ip.p.icmp.checksum = htons(0x0000); - packet->ip.p.icmp.unused = htonl(0x00000000); - - /* set the ip header in the ICMP payload */ - packet = (struct swrap_packet *)(((unsigned char *)ret) + icmp_hdr_len); - packet->ip.hdr.ver_hdrlen = 0x45; /* version 4 and 5 * 32 bit words */ - packet->ip.hdr.tos = 0x00; - packet->ip.hdr.packet_length = htons(wire_len - icmp_hdr_len); - packet->ip.hdr.identification = htons(0xFFFF); - packet->ip.hdr.flags = 0x40; /* BIT 1 set - means don't fraqment */ - packet->ip.hdr.fragment = htons(0x0000); - packet->ip.hdr.ttl = 0xFF; - packet->ip.hdr.protocol = icmp_protocol; - packet->ip.hdr.hdr_checksum = htons(0x0000); - packet->ip.hdr.src_addr = dest_addr->sin_addr.s_addr; - packet->ip.hdr.dest_addr = src_addr->sin_addr.s_addr; - - src_port = dest_addr->sin_port; - dest_port = src_addr->sin_port; - } - - switch (socket_type) { - case SOCK_STREAM: - packet->ip.p.tcp.source_port = src_port; - packet->ip.p.tcp.dest_port = dest_port; - packet->ip.p.tcp.seq_num = htonl(tcp_seqno); - packet->ip.p.tcp.ack_num = htonl(tcp_ack); - packet->ip.p.tcp.hdr_length = 0x50; /* 5 * 32 bit words */ - packet->ip.p.tcp.control = tcp_ctl; - packet->ip.p.tcp.window = htons(0x7FFF); - packet->ip.p.tcp.checksum = htons(0x0000); - packet->ip.p.tcp.urg = htons(0x0000); - - break; - - case SOCK_DGRAM: - packet->ip.p.udp.source_port = src_addr->sin_port; - packet->ip.p.udp.dest_port = dest_addr->sin_port; - packet->ip.p.udp.length = htons(8 + payload_len); - packet->ip.p.udp.checksum = htons(0x0000); - - break; - } - - if (payload && payload_len > 0) { - unsigned char *p = (unsigned char *)ret; - p += nonwire_len; - p += wire_hdr_len; - memcpy(p, payload, payload_len); - } - - *_packet_len = packet_len - icmp_truncate_len; - return ret; -} - -static int swrap_get_pcap_fd(const char *fname) -{ - static int fd = -1; - - if (fd != -1) return fd; - - fd = open(fname, O_WRONLY|O_CREAT|O_EXCL|O_APPEND, 0644); - if (fd != -1) { - struct swrap_file_hdr file_hdr; - file_hdr.magic = 0xA1B2C3D4; - file_hdr.version_major = 0x0002; - file_hdr.version_minor = 0x0004; - file_hdr.timezone = 0x00000000; - file_hdr.sigfigs = 0x00000000; - file_hdr.frame_max_len = SWRAP_FRAME_LENGTH_MAX; - file_hdr.link_type = 0x0065; /* 101 RAW IP */ - - write(fd, &file_hdr, sizeof(file_hdr)); - return fd; - } - - fd = open(fname, O_WRONLY|O_APPEND, 0644); - - return fd; -} - -static struct swrap_packet *swrap_marshall_packet(struct socket_info *si, - const struct sockaddr *addr, - enum swrap_packet_type type, - const void *buf, size_t len, - size_t *packet_len) -{ - const struct sockaddr_in *src_addr; - const struct sockaddr_in *dest_addr; - unsigned long tcp_seqno = 0; - unsigned long tcp_ack = 0; - unsigned char tcp_ctl = 0; - int unreachable = 0; - - struct timeval tv; - - switch (si->family) { - case AF_INET: - break; - default: - return NULL; - } - - switch (type) { - case SWRAP_CONNECT_SEND: - if (si->type != SOCK_STREAM) return NULL; - - src_addr = (const struct sockaddr_in *)si->myname; - dest_addr = (const struct sockaddr_in *)addr; - - tcp_seqno = si->io.pck_snd; - tcp_ack = si->io.pck_rcv; - tcp_ctl = 0x02; /* SYN */ - - si->io.pck_snd += 1; - - break; - - case SWRAP_CONNECT_RECV: - if (si->type != SOCK_STREAM) return NULL; - - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)addr; - - tcp_seqno = si->io.pck_rcv; - tcp_ack = si->io.pck_snd; - tcp_ctl = 0x12; /** SYN,ACK */ - - si->io.pck_rcv += 1; - - break; - - case SWRAP_CONNECT_UNREACH: - if (si->type != SOCK_STREAM) return NULL; - - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)addr; - - /* Unreachable: resend the data of SWRAP_CONNECT_SEND */ - tcp_seqno = si->io.pck_snd - 1; - tcp_ack = si->io.pck_rcv; - tcp_ctl = 0x02; /* SYN */ - unreachable = 1; - - break; - - case SWRAP_CONNECT_ACK: - if (si->type != SOCK_STREAM) return NULL; - - src_addr = (const struct sockaddr_in *)si->myname; - dest_addr = (const struct sockaddr_in *)addr; - - tcp_seqno = si->io.pck_snd; - tcp_ack = si->io.pck_rcv; - tcp_ctl = 0x10; /* ACK */ - - break; - - case SWRAP_ACCEPT_SEND: - if (si->type != SOCK_STREAM) return NULL; - - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)addr; - - tcp_seqno = si->io.pck_rcv; - tcp_ack = si->io.pck_snd; - tcp_ctl = 0x02; /* SYN */ - - si->io.pck_rcv += 1; - - break; - - case SWRAP_ACCEPT_RECV: - if (si->type != SOCK_STREAM) return NULL; - - src_addr = (const struct sockaddr_in *)si->myname; - dest_addr = (const struct sockaddr_in *)addr; - - tcp_seqno = si->io.pck_snd; - tcp_ack = si->io.pck_rcv; - tcp_ctl = 0x12; /* SYN,ACK */ - - si->io.pck_snd += 1; - - break; - - case SWRAP_ACCEPT_ACK: - if (si->type != SOCK_STREAM) return NULL; - - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)addr; - - tcp_seqno = si->io.pck_rcv; - tcp_ack = si->io.pck_snd; - tcp_ctl = 0x10; /* ACK */ - - break; - - case SWRAP_SEND: - src_addr = (const struct sockaddr_in *)si->myname; - dest_addr = (const struct sockaddr_in *)si->peername; - - tcp_seqno = si->io.pck_snd; - tcp_ack = si->io.pck_rcv; - tcp_ctl = 0x18; /* PSH,ACK */ - - si->io.pck_snd += len; - - break; - - case SWRAP_SEND_RST: - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)si->peername; - - if (si->type == SOCK_DGRAM) { - return swrap_marshall_packet(si, si->peername, - SWRAP_SENDTO_UNREACH, - buf, len, packet_len); - } - - tcp_seqno = si->io.pck_rcv; - tcp_ack = si->io.pck_snd; - tcp_ctl = 0x14; /** RST,ACK */ - - break; - - case SWRAP_PENDING_RST: - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)si->peername; - - if (si->type == SOCK_DGRAM) { - return NULL; - } - - tcp_seqno = si->io.pck_rcv; - tcp_ack = si->io.pck_snd; - tcp_ctl = 0x14; /* RST,ACK */ - - break; - - case SWRAP_RECV: - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)si->peername; - - tcp_seqno = si->io.pck_rcv; - tcp_ack = si->io.pck_snd; - tcp_ctl = 0x18; /* PSH,ACK */ - - si->io.pck_rcv += len; - - break; - - case SWRAP_RECV_RST: - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)si->peername; - - if (si->type == SOCK_DGRAM) { - return NULL; - } - - tcp_seqno = si->io.pck_rcv; - tcp_ack = si->io.pck_snd; - tcp_ctl = 0x14; /* RST,ACK */ - - break; - - case SWRAP_SENDTO: - src_addr = (const struct sockaddr_in *)si->myname; - dest_addr = (const struct sockaddr_in *)addr; - - si->io.pck_snd += len; - - break; - - case SWRAP_SENDTO_UNREACH: - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)addr; - - unreachable = 1; - - break; - - case SWRAP_RECVFROM: - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)addr; - - si->io.pck_rcv += len; - - break; - - case SWRAP_CLOSE_SEND: - if (si->type != SOCK_STREAM) return NULL; - - src_addr = (const struct sockaddr_in *)si->myname; - dest_addr = (const struct sockaddr_in *)si->peername; - - tcp_seqno = si->io.pck_snd; - tcp_ack = si->io.pck_rcv; - tcp_ctl = 0x11; /* FIN, ACK */ - - si->io.pck_snd += 1; - - break; - - case SWRAP_CLOSE_RECV: - if (si->type != SOCK_STREAM) return NULL; - - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)si->peername; - - tcp_seqno = si->io.pck_rcv; - tcp_ack = si->io.pck_snd; - tcp_ctl = 0x11; /* FIN,ACK */ - - si->io.pck_rcv += 1; - - break; - - case SWRAP_CLOSE_ACK: - if (si->type != SOCK_STREAM) return NULL; - - src_addr = (const struct sockaddr_in *)si->myname; - dest_addr = (const struct sockaddr_in *)si->peername; - - tcp_seqno = si->io.pck_snd; - tcp_ack = si->io.pck_rcv; - tcp_ctl = 0x10; /* ACK */ - - break; - default: - return NULL; - } - - swrapGetTimeOfDay(&tv); - - return swrap_packet_init(&tv, src_addr, dest_addr, si->type, - (const unsigned char *)buf, len, - tcp_seqno, tcp_ack, tcp_ctl, unreachable, - packet_len); -} - -static void swrap_dump_packet(struct socket_info *si, - const struct sockaddr *addr, - enum swrap_packet_type type, - const void *buf, size_t len) -{ - const char *file_name; - struct swrap_packet *packet; - size_t packet_len = 0; - int fd; - - file_name = socket_wrapper_pcap_file(); - if (!file_name) { - return; - } - - packet = swrap_marshall_packet(si, addr, type, buf, len, &packet_len); - if (!packet) { - return; - } - - fd = swrap_get_pcap_fd(file_name); - if (fd != -1) { - write(fd, packet, packet_len); - } - - free(packet); -} - -_PUBLIC_ int swrap_socket(int family, int type, int protocol) -{ - struct socket_info *si; - int fd; - - if (!socket_wrapper_dir()) { - return real_socket(family, type, protocol); - } - - switch (family) { - case AF_INET: -#ifdef HAVE_IPV6 - case AF_INET6: -#endif - break; - case AF_UNIX: - return real_socket(family, type, protocol); - default: - errno = EAFNOSUPPORT; - return -1; - } - - switch (type) { - case SOCK_STREAM: - break; - case SOCK_DGRAM: - break; - default: - errno = EPROTONOSUPPORT; - return -1; - } - - switch (protocol) { - case 0: - break; - case 6: - if (type == SOCK_STREAM) { - break; - } - /*fall through*/ - case 17: - if (type == SOCK_DGRAM) { - break; - } - /*fall through*/ - default: - errno = EPROTONOSUPPORT; - return -1; - } - - fd = real_socket(AF_UNIX, type, 0); - - if (fd == -1) return -1; - - si = (struct socket_info *)calloc(1, sizeof(struct socket_info)); - - si->family = family; - si->type = type; - si->protocol = protocol; - si->fd = fd; - - SWRAP_DLIST_ADD(sockets, si); - - return si->fd; -} - -_PUBLIC_ int swrap_accept(int s, struct sockaddr *addr, socklen_t *addrlen) -{ - struct socket_info *parent_si, *child_si; - int fd; - struct sockaddr_un un_addr; - socklen_t un_addrlen = sizeof(un_addr); - struct sockaddr_un un_my_addr; - socklen_t un_my_addrlen = sizeof(un_my_addr); - struct sockaddr *my_addr; - socklen_t my_addrlen, len; - int ret; - - parent_si = find_socket_info(s); - if (!parent_si) { - return real_accept(s, addr, addrlen); - } - - /* - * assume out sockaddr have the same size as the in parent - * socket family - */ - my_addrlen = socket_length(parent_si->family); - if (my_addrlen <= 0) { - errno = EINVAL; - return -1; - } - - my_addr = (struct sockaddr *)malloc(my_addrlen); - if (my_addr == NULL) { - return -1; - } - - memset(&un_addr, 0, sizeof(un_addr)); - memset(&un_my_addr, 0, sizeof(un_my_addr)); - - ret = real_accept(s, (struct sockaddr *)&un_addr, &un_addrlen); - if (ret == -1) { - free(my_addr); - return ret; - } - - fd = ret; - - len = my_addrlen; - ret = sockaddr_convert_from_un(parent_si, &un_addr, un_addrlen, - parent_si->family, my_addr, &len); - if (ret == -1) { - free(my_addr); - close(fd); - return ret; - } - - child_si = (struct socket_info *)malloc(sizeof(struct socket_info)); - memset(child_si, 0, sizeof(*child_si)); - - child_si->fd = fd; - child_si->family = parent_si->family; - child_si->type = parent_si->type; - child_si->protocol = parent_si->protocol; - child_si->bound = 1; - child_si->is_server = 1; - - child_si->peername_len = len; - child_si->peername = sockaddr_dup(my_addr, len); - - if (addr != NULL && addrlen != NULL) { - *addrlen = len; - if (*addrlen >= len) - memcpy(addr, my_addr, len); - *addrlen = 0; - } - - ret = real_getsockname(fd, (struct sockaddr *)&un_my_addr, &un_my_addrlen); - if (ret == -1) { - free(child_si); - close(fd); - return ret; - } - - len = my_addrlen; - ret = sockaddr_convert_from_un(child_si, &un_my_addr, un_my_addrlen, - child_si->family, my_addr, &len); - if (ret == -1) { - free(child_si); - free(my_addr); - close(fd); - return ret; - } - - child_si->myname_len = len; - child_si->myname = sockaddr_dup(my_addr, len); - free(my_addr); - - SWRAP_DLIST_ADD(sockets, child_si); - - swrap_dump_packet(child_si, addr, SWRAP_ACCEPT_SEND, NULL, 0); - swrap_dump_packet(child_si, addr, SWRAP_ACCEPT_RECV, NULL, 0); - swrap_dump_packet(child_si, addr, SWRAP_ACCEPT_ACK, NULL, 0); - - return fd; -} - -static int autobind_start_init; -static int autobind_start; - -/* using sendto() or connect() on an unbound socket would give the - recipient no way to reply, as unlike UDP and TCP, a unix domain - socket can't auto-assign emphemeral port numbers, so we need to - assign it here */ -static int swrap_auto_bind(struct socket_info *si) -{ - struct sockaddr_un un_addr; - int i; - char type; - int ret; - int port; - struct stat st; - - if (autobind_start_init != 1) { - autobind_start_init = 1; - autobind_start = getpid(); - autobind_start %= 50000; - autobind_start += 10000; - } - - un_addr.sun_family = AF_UNIX; - - switch (si->family) { - case AF_INET: { - struct sockaddr_in in; - - switch (si->type) { - case SOCK_STREAM: - type = SOCKET_TYPE_CHAR_TCP; - break; - case SOCK_DGRAM: - type = SOCKET_TYPE_CHAR_UDP; - break; - default: - errno = ESOCKTNOSUPPORT; - return -1; - } - - memset(&in, 0, sizeof(in)); - in.sin_family = AF_INET; - in.sin_addr.s_addr = htonl(127<<24 | - socket_wrapper_default_iface()); - - si->myname_len = sizeof(in); - si->myname = sockaddr_dup(&in, si->myname_len); - break; - } -#ifdef HAVE_IPV6 - case AF_INET6: { - struct sockaddr_in6 in6; - - switch (si->type) { - case SOCK_STREAM: - type = SOCKET_TYPE_CHAR_TCP_V6; - break; - case SOCK_DGRAM: - type = SOCKET_TYPE_CHAR_UDP_V6; - break; - default: - errno = ESOCKTNOSUPPORT; - return -1; - } - - memset(&in6, 0, sizeof(in6)); - in6.sin6_family = AF_INET6; - in6.sin6_addr.s6_addr[0] = SW_IPV6_ADDRESS; - si->myname_len = sizeof(in6); - si->myname = sockaddr_dup(&in6, si->myname_len); - break; - } -#endif - default: - errno = ESOCKTNOSUPPORT; - return -1; - } - - if (autobind_start > 60000) { - autobind_start = 10000; - } - - for (i=0;i<1000;i++) { - port = autobind_start + i; - snprintf(un_addr.sun_path, sizeof(un_addr.sun_path), - "%s/"SOCKET_FORMAT, socket_wrapper_dir(), - type, socket_wrapper_default_iface(), port); - if (stat(un_addr.sun_path, &st) == 0) continue; - - ret = real_bind(si->fd, (struct sockaddr *)&un_addr, sizeof(un_addr)); - if (ret == -1) return ret; - - si->tmp_path = strdup(un_addr.sun_path); - si->bound = 1; - autobind_start = port + 1; - break; - } - if (i == 1000) { - errno = ENFILE; - return -1; - } - - set_port(si->family, port, si->myname); - - return 0; -} - - -_PUBLIC_ int swrap_connect(int s, const struct sockaddr *serv_addr, socklen_t addrlen) -{ - int ret; - struct sockaddr_un un_addr; - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_connect(s, serv_addr, addrlen); - } - - if (si->bound == 0) { - ret = swrap_auto_bind(si); - if (ret == -1) return -1; - } - - if (si->family != serv_addr->sa_family) { - errno = EINVAL; - return -1; - } - - ret = sockaddr_convert_to_un(si, (const struct sockaddr *)serv_addr, addrlen, &un_addr, 0, NULL); - if (ret == -1) return -1; - - swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_SEND, NULL, 0); - - ret = real_connect(s, (struct sockaddr *)&un_addr, - sizeof(struct sockaddr_un)); - - /* to give better errors */ - if (ret == -1 && errno == ENOENT) { - errno = EHOSTUNREACH; - } - - if (ret == 0) { - si->peername_len = addrlen; - si->peername = sockaddr_dup(serv_addr, addrlen); - - swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_RECV, NULL, 0); - swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_ACK, NULL, 0); - } else { - swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_UNREACH, NULL, 0); - } - - return ret; -} - -_PUBLIC_ int swrap_bind(int s, const struct sockaddr *myaddr, socklen_t addrlen) -{ - int ret; - struct sockaddr_un un_addr; - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_bind(s, myaddr, addrlen); - } - - si->myname_len = addrlen; - si->myname = sockaddr_dup(myaddr, addrlen); - - ret = sockaddr_convert_to_un(si, (const struct sockaddr *)myaddr, addrlen, &un_addr, 1, &si->bcast); - if (ret == -1) return -1; - - unlink(un_addr.sun_path); - - ret = real_bind(s, (struct sockaddr *)&un_addr, - sizeof(struct sockaddr_un)); - - if (ret == 0) { - si->bound = 1; - } - - return ret; -} - -_PUBLIC_ int swrap_listen(int s, int backlog) -{ - int ret; - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_listen(s, backlog); - } - - ret = real_listen(s, backlog); - - return ret; -} - -_PUBLIC_ int swrap_getpeername(int s, struct sockaddr *name, socklen_t *addrlen) -{ - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_getpeername(s, name, addrlen); - } - - if (!si->peername) - { - errno = ENOTCONN; - return -1; - } - - memcpy(name, si->peername, si->peername_len); - *addrlen = si->peername_len; - - return 0; -} - -_PUBLIC_ int swrap_getsockname(int s, struct sockaddr *name, socklen_t *addrlen) -{ - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_getsockname(s, name, addrlen); - } - - memcpy(name, si->myname, si->myname_len); - *addrlen = si->myname_len; - - return 0; -} - -_PUBLIC_ int swrap_getsockopt(int s, int level, int optname, void *optval, socklen_t *optlen) -{ - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_getsockopt(s, level, optname, optval, optlen); - } - - if (level == SOL_SOCKET) { - return real_getsockopt(s, level, optname, optval, optlen); - } - - errno = ENOPROTOOPT; - return -1; -} - -_PUBLIC_ int swrap_setsockopt(int s, int level, int optname, const void *optval, socklen_t optlen) -{ - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_setsockopt(s, level, optname, optval, optlen); - } - - if (level == SOL_SOCKET) { - return real_setsockopt(s, level, optname, optval, optlen); - } - - switch (si->family) { - case AF_INET: - return 0; - default: - errno = ENOPROTOOPT; - return -1; - } -} - -_PUBLIC_ ssize_t swrap_recvfrom(int s, void *buf, size_t len, int flags, struct sockaddr *from, socklen_t *fromlen) -{ - struct sockaddr_un un_addr; - socklen_t un_addrlen = sizeof(un_addr); - int ret; - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_recvfrom(s, buf, len, flags, from, fromlen); - } - - len = MIN(len, 1500); - - /* irix 6.4 forgets to null terminate the sun_path string :-( */ - memset(&un_addr, 0, sizeof(un_addr)); - ret = real_recvfrom(s, buf, len, flags, (struct sockaddr *)&un_addr, &un_addrlen); - if (ret == -1) - return ret; - - if (sockaddr_convert_from_un(si, &un_addr, un_addrlen, - si->family, from, fromlen) == -1) { - return -1; - } - - swrap_dump_packet(si, from, SWRAP_RECVFROM, buf, ret); - - return ret; -} - - -_PUBLIC_ ssize_t swrap_sendto(int s, const void *buf, size_t len, int flags, const struct sockaddr *to, socklen_t tolen) -{ - struct sockaddr_un un_addr; - int ret; - struct socket_info *si = find_socket_info(s); - int bcast = 0; - - if (!si) { - return real_sendto(s, buf, len, flags, to, tolen); - } - - len = MIN(len, 1500); - - switch (si->type) { - case SOCK_STREAM: - ret = real_send(s, buf, len, flags); - break; - case SOCK_DGRAM: - if (si->bound == 0) { - ret = swrap_auto_bind(si); - if (ret == -1) return -1; - } - - ret = sockaddr_convert_to_un(si, to, tolen, &un_addr, 0, &bcast); - if (ret == -1) return -1; - - if (bcast) { - struct stat st; - unsigned int iface; - unsigned int prt = ntohs(((const struct sockaddr_in *)to)->sin_port); - char type; - - type = SOCKET_TYPE_CHAR_UDP; - - for(iface=0; iface <= MAX_WRAPPED_INTERFACES; iface++) { - snprintf(un_addr.sun_path, sizeof(un_addr.sun_path), "%s/"SOCKET_FORMAT, - socket_wrapper_dir(), type, iface, prt); - if (stat(un_addr.sun_path, &st) != 0) continue; - - /* ignore the any errors in broadcast sends */ - real_sendto(s, buf, len, flags, (struct sockaddr *)&un_addr, sizeof(un_addr)); - } - - swrap_dump_packet(si, to, SWRAP_SENDTO, buf, len); - - return len; - } - - ret = real_sendto(s, buf, len, flags, (struct sockaddr *)&un_addr, sizeof(un_addr)); - break; - default: - ret = -1; - errno = EHOSTUNREACH; - break; - } - - /* to give better errors */ - if (ret == -1 && errno == ENOENT) { - errno = EHOSTUNREACH; - } - - if (ret == -1) { - swrap_dump_packet(si, to, SWRAP_SENDTO, buf, len); - swrap_dump_packet(si, to, SWRAP_SENDTO_UNREACH, buf, len); - } else { - swrap_dump_packet(si, to, SWRAP_SENDTO, buf, ret); - } - - return ret; -} - -_PUBLIC_ int swrap_ioctl(int s, int r, void *p) -{ - int ret; - struct socket_info *si = find_socket_info(s); - int value; - - if (!si) { - return real_ioctl(s, r, p); - } - - ret = real_ioctl(s, r, p); - - switch (r) { - case FIONREAD: - value = *((int *)p); - if (ret == -1 && errno != EAGAIN && errno != ENOBUFS) { - swrap_dump_packet(si, NULL, SWRAP_PENDING_RST, NULL, 0); - } else if (value == 0) { /* END OF FILE */ - swrap_dump_packet(si, NULL, SWRAP_PENDING_RST, NULL, 0); - } - break; - } - - return ret; -} - -_PUBLIC_ ssize_t swrap_recv(int s, void *buf, size_t len, int flags) -{ - int ret; - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_recv(s, buf, len, flags); - } - - len = MIN(len, 1500); - - ret = real_recv(s, buf, len, flags); - if (ret == -1 && errno != EAGAIN && errno != ENOBUFS) { - swrap_dump_packet(si, NULL, SWRAP_RECV_RST, NULL, 0); - } else if (ret == 0) { /* END OF FILE */ - swrap_dump_packet(si, NULL, SWRAP_RECV_RST, NULL, 0); - } else { - swrap_dump_packet(si, NULL, SWRAP_RECV, buf, ret); - } - - return ret; -} - - -_PUBLIC_ ssize_t swrap_send(int s, const void *buf, size_t len, int flags) -{ - int ret; - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_send(s, buf, len, flags); - } - - len = MIN(len, 1500); - - ret = real_send(s, buf, len, flags); - - if (ret == -1) { - swrap_dump_packet(si, NULL, SWRAP_SEND, buf, len); - swrap_dump_packet(si, NULL, SWRAP_SEND_RST, NULL, 0); - } else { - swrap_dump_packet(si, NULL, SWRAP_SEND, buf, ret); - } - - return ret; -} - -_PUBLIC_ int swrap_close(int fd) -{ - struct socket_info *si = find_socket_info(fd); - int ret; - - if (!si) { - return real_close(fd); - } - - SWRAP_DLIST_REMOVE(sockets, si); - - if (si->myname && si->peername) { - swrap_dump_packet(si, NULL, SWRAP_CLOSE_SEND, NULL, 0); - } - - ret = real_close(fd); - - if (si->myname && si->peername) { - swrap_dump_packet(si, NULL, SWRAP_CLOSE_RECV, NULL, 0); - swrap_dump_packet(si, NULL, SWRAP_CLOSE_ACK, NULL, 0); - } - - if (si->path) free(si->path); - if (si->myname) free(si->myname); - if (si->peername) free(si->peername); - if (si->tmp_path) { - unlink(si->tmp_path); - free(si->tmp_path); - } - free(si); - - return ret; -} diff --git a/source3/lib/socket_wrapper/socket_wrapper.h b/source3/lib/socket_wrapper/socket_wrapper.h deleted file mode 100644 index cc8b937608..0000000000 --- a/source3/lib/socket_wrapper/socket_wrapper.h +++ /dev/null @@ -1,136 +0,0 @@ -/* - * Copyright (C) Jelmer Vernooij 2005 - * Copyright (C) Stefan Metzmacher 2006 - * - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * 3. Neither the name of the author nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - */ - -#ifndef __SOCKET_WRAPPER_H__ -#define __SOCKET_WRAPPER_H__ - -const char *socket_wrapper_dir(void); -unsigned int socket_wrapper_default_iface(void); -int swrap_socket(int family, int type, int protocol); -int swrap_accept(int s, struct sockaddr *addr, socklen_t *addrlen); -int swrap_connect(int s, const struct sockaddr *serv_addr, socklen_t addrlen); -int swrap_bind(int s, const struct sockaddr *myaddr, socklen_t addrlen); -int swrap_listen(int s, int backlog); -int swrap_getpeername(int s, struct sockaddr *name, socklen_t *addrlen); -int swrap_getsockname(int s, struct sockaddr *name, socklen_t *addrlen); -int swrap_getsockopt(int s, int level, int optname, void *optval, socklen_t *optlen); -int swrap_setsockopt(int s, int level, int optname, const void *optval, socklen_t optlen); -ssize_t swrap_recvfrom(int s, void *buf, size_t len, int flags, struct sockaddr *from, socklen_t *fromlen); -ssize_t swrap_sendto(int s, const void *buf, size_t len, int flags, const struct sockaddr *to, socklen_t tolen); -int swrap_ioctl(int s, int req, void *ptr); -ssize_t swrap_recv(int s, void *buf, size_t len, int flags); -ssize_t swrap_send(int s, const void *buf, size_t len, int flags); -int swrap_close(int); - -#ifdef SOCKET_WRAPPER_REPLACE - -#ifdef accept -#undef accept -#endif -#define accept(s,addr,addrlen) swrap_accept(s,addr,addrlen) - -#ifdef connect -#undef connect -#endif -#define connect(s,serv_addr,addrlen) swrap_connect(s,serv_addr,addrlen) - -#ifdef bind -#undef bind -#endif -#define bind(s,myaddr,addrlen) swrap_bind(s,myaddr,addrlen) - -#ifdef listen -#undef listen -#endif -#define listen(s,blog) swrap_listen(s,blog) - -#ifdef getpeername -#undef getpeername -#endif -#define getpeername(s,name,addrlen) swrap_getpeername(s,name,addrlen) - -#ifdef getsockname -#undef getsockname -#endif -#define getsockname(s,name,addrlen) swrap_getsockname(s,name,addrlen) - -#ifdef getsockopt -#undef getsockopt -#endif -#define getsockopt(s,level,optname,optval,optlen) swrap_getsockopt(s,level,optname,optval,optlen) - -#ifdef setsockopt -#undef setsockopt -#endif -#define setsockopt(s,level,optname,optval,optlen) swrap_setsockopt(s,level,optname,optval,optlen) - -#ifdef recvfrom -#undef recvfrom -#endif -#define recvfrom(s,buf,len,flags,from,fromlen) swrap_recvfrom(s,buf,len,flags,from,fromlen) - -#ifdef sendto -#undef sendto -#endif -#define sendto(s,buf,len,flags,to,tolen) swrap_sendto(s,buf,len,flags,to,tolen) - -#ifdef ioctl -#undef ioctl -#endif -#define ioctl(s,req,ptr) swrap_ioctl(s,req,ptr) - -#ifdef recv -#undef recv -#endif -#define recv(s,buf,len,flags) swrap_recv(s,buf,len,flags) - -#ifdef send -#undef send -#endif -#define send(s,buf,len,flags) swrap_send(s,buf,len,flags) - -#ifdef socket -#undef socket -#endif -#define socket(domain,type,protocol) swrap_socket(domain,type,protocol) - -#ifdef close -#undef close -#endif -#define close(s) swrap_close(s) -#endif - - -#endif /* __SOCKET_WRAPPER_H__ */ diff --git a/source3/lib/socket_wrapper/testsuite.c b/source3/lib/socket_wrapper/testsuite.c deleted file mode 100644 index 8877418e4c..0000000000 --- a/source3/lib/socket_wrapper/testsuite.c +++ /dev/null @@ -1,105 +0,0 @@ -/* - Unix SMB/CIFS implementation. - - local testing of the socket wrapper - - Copyright (C) Jelmer Vernooij 2007 - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see . -*/ - -#include "includes.h" -#include "system/network.h" -#include "lib/socket_wrapper/socket_wrapper.h" -#include "torture/torture.h" - -static char *old_dir = NULL; -static char *old_iface = NULL; - -static void backup_env(void) -{ - old_dir = getenv("SOCKET_WRAPPER_DIR"); - old_iface = getenv("SOCKET_WRAPPER_DEFAULT_IFACE"); -} - -static void restore_env(void) -{ - if (old_dir == NULL) - unsetenv("SOCKET_WRAPPER_DIR"); - else - setenv("SOCKET_WRAPPER_DIR", old_dir, 1); - if (old_iface == NULL) - unsetenv("SOCKET_WRAPPER_DEFAULT_IFACE"); - else - setenv("SOCKET_WRAPPER_DEFAULT_IFACE", old_iface, 1); -} - -static bool test_socket_wrapper_dir(struct torture_context *tctx) -{ - backup_env(); - - setenv("SOCKET_WRAPPER_DIR", "foo", 1); - torture_assert_str_equal(tctx, socket_wrapper_dir(), "foo", "setting failed"); - setenv("SOCKET_WRAPPER_DIR", "./foo", 1); - torture_assert_str_equal(tctx, socket_wrapper_dir(), "foo", "setting failed"); - unsetenv("SOCKET_WRAPPER_DIR"); - torture_assert_str_equal(tctx, socket_wrapper_dir(), NULL, "resetting failed"); - - restore_env(); - - return true; -} - -static bool test_swrap_socket(struct torture_context *tctx) -{ - backup_env(); - setenv("SOCKET_WRAPPER_DIR", "foo", 1); - - torture_assert_int_equal(tctx, swrap_socket(1337, 1337, 0), -1, "unknown address family fails"); - torture_assert_int_equal(tctx, errno, EAFNOSUPPORT, "correct errno set"); - torture_assert_int_equal(tctx, swrap_socket(AF_INET, 1337, 0), -1, "unknown type fails"); - torture_assert_int_equal(tctx, errno, EPROTONOSUPPORT, "correct errno set"); - torture_assert_int_equal(tctx, swrap_socket(AF_INET, SOCK_DGRAM, 10), -1, "unknown protocol fails"); - torture_assert_int_equal(tctx, errno, EPROTONOSUPPORT, "correct errno set"); - - restore_env(); - - return true; -} - -unsigned int socket_wrapper_default_iface(void); -static bool test_socket_wrapper_default_iface(struct torture_context *tctx) -{ - backup_env(); - unsetenv("SOCKET_WRAPPER_DEFAULT_IFACE"); - torture_assert_int_equal(tctx, socket_wrapper_default_iface(), 1, "unset"); - setenv("SOCKET_WRAPPER_DEFAULT_IFACE", "2", 1); - torture_assert_int_equal(tctx, socket_wrapper_default_iface(), 2, "unset"); - setenv("SOCKET_WRAPPER_DEFAULT_IFACE", "bla", 1); - torture_assert_int_equal(tctx, socket_wrapper_default_iface(), 1, "unset"); - restore_env(); - return true; -} - -struct torture_suite *torture_local_socket_wrapper(TALLOC_CTX *mem_ctx) -{ - struct torture_suite *suite = torture_suite_create(mem_ctx, - "SOCKET-WRAPPER"); - - torture_suite_add_simple_test(suite, "socket_wrapper_dir", test_socket_wrapper_dir); - torture_suite_add_simple_test(suite, "socket", test_swrap_socket); - torture_suite_add_simple_test(suite, "socket_wrapper_default_iface", test_socket_wrapper_default_iface); - - return suite; -} diff --git a/source4/Makefile b/source4/Makefile index 546eb072d8..2dd0af0389 100644 --- a/source4/Makefile +++ b/source4/Makefile @@ -71,7 +71,7 @@ libmessagingsrcdir := lib/messaging libeventssrcdir := lib/events libcmdlinesrcdir := lib/cmdline poptsrcdir := lib/popt -socketwrappersrcdir := lib/socket_wrapper +socketwrappersrcdir := ../socket_wrapper nsswrappersrcdir := lib/nss_wrapper appwebsrcdir := lib/appweb libstreamsrcdir := lib/stream diff --git a/source4/configure.ac b/source4/configure.ac index d03092c6b6..d29b01445f 100644 --- a/source4/configure.ac +++ b/source4/configure.ac @@ -99,7 +99,7 @@ m4_include(auth/gensec/config.m4) m4_include(smbd/process_model.m4) m4_include(ntvfs/posix/config.m4) m4_include(ntvfs/unixuid/config.m4) -m4_include(lib/socket_wrapper/config.m4) +m4_include(../socket_wrapper/config.m4) m4_include(lib/nss_wrapper/config.m4) m4_include(auth/config.m4) m4_include(kdc/config.m4) diff --git a/source4/lib/replace/system/network.h b/source4/lib/replace/system/network.h index 077892a54e..473d79b5f2 100644 --- a/source4/lib/replace/system/network.h +++ b/source4/lib/replace/system/network.h @@ -326,7 +326,7 @@ struct addrinfo { #ifndef SOCKET_WRAPPER_NOT_REPLACE #define SOCKET_WRAPPER_REPLACE #endif -#include "lib/socket_wrapper/socket_wrapper.h" +#include "../socket_wrapper/socket_wrapper.h" #endif #endif diff --git a/source4/lib/socket_wrapper/config.m4 b/source4/lib/socket_wrapper/config.m4 deleted file mode 100644 index f3ffb895a9..0000000000 --- a/source4/lib/socket_wrapper/config.m4 +++ /dev/null @@ -1,22 +0,0 @@ -AC_ARG_ENABLE(socket-wrapper, -[ --enable-socket-wrapper Turn on socket wrapper library (default=no)]) - -DEFAULT_TEST_OPTIONS= -HAVE_SOCKET_WRAPPER=no - -if eval "test x$developer = xyes"; then - enable_socket_wrapper=yes -fi - -if eval "test x$enable_socket_wrapper = xyes"; then - AC_DEFINE(SOCKET_WRAPPER,1,[Use socket wrapper library]) - DEFAULT_TEST_OPTIONS=--socket-wrapper - HAVE_SOCKET_WRAPPER=yes - - # this is only used for samba3 - SOCKET_WRAPPER_OBJS="lib/socket_wrapper/socket_wrapper.o" -fi - -AC_SUBST(DEFAULT_TEST_OPTIONS) -AC_SUBST(HAVE_SOCKET_WRAPPER) -AC_SUBST(SOCKET_WRAPPER_OBJS) diff --git a/source4/lib/socket_wrapper/config.mk b/source4/lib/socket_wrapper/config.mk deleted file mode 100644 index 60cfb3209a..0000000000 --- a/source4/lib/socket_wrapper/config.mk +++ /dev/null @@ -1,8 +0,0 @@ -############################## -# Start SUBSYSTEM SOCKET_WRAPPER -[SUBSYSTEM::SOCKET_WRAPPER] -PRIVATE_DEPENDENCIES = LIBREPLACE_NETWORK -# End SUBSYSTEM SOCKET_WRAPPER -############################## - -SOCKET_WRAPPER_OBJ_FILES = $(socketwrappersrcdir)/socket_wrapper.o diff --git a/source4/lib/socket_wrapper/socket_wrapper.c b/source4/lib/socket_wrapper/socket_wrapper.c deleted file mode 100644 index 336179d837..0000000000 --- a/source4/lib/socket_wrapper/socket_wrapper.c +++ /dev/null @@ -1,1841 +0,0 @@ -/* - * Copyright (C) Jelmer Vernooij 2005,2008 - * Copyright (C) Stefan Metzmacher 2006 - * - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * 3. Neither the name of the author nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - */ - -/* - Socket wrapper library. Passes all socket communication over - unix domain sockets if the environment variable SOCKET_WRAPPER_DIR - is set. -*/ - -#ifdef _SAMBA_BUILD_ - -#define SOCKET_WRAPPER_NOT_REPLACE -#include "lib/replace/replace.h" -#include "system/network.h" -#include "system/filesys.h" -#include "system/time.h" - -#else /* _SAMBA_BUILD_ */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#endif - -#ifndef _PUBLIC_ -#define _PUBLIC_ -#endif - -#define SWRAP_DLIST_ADD(list,item) do { \ - if (!(list)) { \ - (item)->prev = NULL; \ - (item)->next = NULL; \ - (list) = (item); \ - } else { \ - (item)->prev = NULL; \ - (item)->next = (list); \ - (list)->prev = (item); \ - (list) = (item); \ - } \ -} while (0) - -#define SWRAP_DLIST_REMOVE(list,item) do { \ - if ((list) == (item)) { \ - (list) = (item)->next; \ - if (list) { \ - (list)->prev = NULL; \ - } \ - } else { \ - if ((item)->prev) { \ - (item)->prev->next = (item)->next; \ - } \ - if ((item)->next) { \ - (item)->next->prev = (item)->prev; \ - } \ - } \ - (item)->prev = NULL; \ - (item)->next = NULL; \ -} while (0) - -/* LD_PRELOAD doesn't work yet, so REWRITE_CALLS is all we support - * for now */ -#define REWRITE_CALLS - -#ifdef REWRITE_CALLS -#define real_accept accept -#define real_connect connect -#define real_bind bind -#define real_listen listen -#define real_getpeername getpeername -#define real_getsockname getsockname -#define real_getsockopt getsockopt -#define real_setsockopt setsockopt -#define real_recvfrom recvfrom -#define real_sendto sendto -#define real_ioctl ioctl -#define real_recv recv -#define real_send send -#define real_socket socket -#define real_close close -#endif - -#ifdef HAVE_GETTIMEOFDAY_TZ -#define swrapGetTimeOfDay(tval) gettimeofday(tval,NULL) -#else -#define swrapGetTimeOfDay(tval) gettimeofday(tval) -#endif - -/* we need to use a very terse format here as IRIX 6.4 silently - truncates names to 16 chars, so if we use a longer name then we - can't tell which port a packet came from with recvfrom() - - with this format we have 8 chars left for the directory name -*/ -#define SOCKET_FORMAT "%c%02X%04X" -#define SOCKET_TYPE_CHAR_TCP 'T' -#define SOCKET_TYPE_CHAR_UDP 'U' -#define SOCKET_TYPE_CHAR_TCP_V6 'X' -#define SOCKET_TYPE_CHAR_UDP_V6 'Y' - -#define MAX_WRAPPED_INTERFACES 16 - -#define SW_IPV6_ADDRESS 1 - -static struct sockaddr *sockaddr_dup(const void *data, socklen_t len) -{ - struct sockaddr *ret = (struct sockaddr *)malloc(len); - memcpy(ret, data, len); - return ret; -} - -static void set_port(int family, int prt, struct sockaddr *addr) -{ - switch (family) { - case AF_INET: - ((struct sockaddr_in *)addr)->sin_port = htons(prt); - break; -#ifdef HAVE_IPV6 - case AF_INET6: - ((struct sockaddr_in6 *)addr)->sin6_port = htons(prt); - break; -#endif - } -} - -static size_t socket_length(int family) -{ - switch (family) { - case AF_INET: - return sizeof(struct sockaddr_in); -#ifdef HAVE_IPV6 - case AF_INET6: - return sizeof(struct sockaddr_in6); -#endif - } - return 0; -} - - - -struct socket_info -{ - int fd; - - int family; - int type; - int protocol; - int bound; - int bcast; - int is_server; - - char *path; - char *tmp_path; - - struct sockaddr *myname; - socklen_t myname_len; - - struct sockaddr *peername; - socklen_t peername_len; - - struct { - unsigned long pck_snd; - unsigned long pck_rcv; - } io; - - struct socket_info *prev, *next; -}; - -static struct socket_info *sockets; - -const char *socket_wrapper_dir(void) -{ - const char *s = getenv("SOCKET_WRAPPER_DIR"); - if (s == NULL) { - return NULL; - } - if (strncmp(s, "./", 2) == 0) { - s += 2; - } - return s; -} - -unsigned int socket_wrapper_default_iface(void) -{ - const char *s = getenv("SOCKET_WRAPPER_DEFAULT_IFACE"); - if (s) { - unsigned int iface; - if (sscanf(s, "%u", &iface) == 1) { - if (iface >= 1 && iface <= MAX_WRAPPED_INTERFACES) { - return iface; - } - } - } - - return 1;/* 127.0.0.1 */ -} - -static int convert_un_in(const struct sockaddr_un *un, struct sockaddr *in, socklen_t *len) -{ - unsigned int iface; - unsigned int prt; - const char *p; - char type; - - p = strrchr(un->sun_path, '/'); - if (p) p++; else p = un->sun_path; - - if (sscanf(p, SOCKET_FORMAT, &type, &iface, &prt) != 3) { - errno = EINVAL; - return -1; - } - - if (iface == 0 || iface > MAX_WRAPPED_INTERFACES) { - errno = EINVAL; - return -1; - } - - if (prt > 0xFFFF) { - errno = EINVAL; - return -1; - } - - switch(type) { - case SOCKET_TYPE_CHAR_TCP: - case SOCKET_TYPE_CHAR_UDP: { - struct sockaddr_in *in2 = (struct sockaddr_in *)in; - - if ((*len) < sizeof(*in2)) { - errno = EINVAL; - return -1; - } - - memset(in2, 0, sizeof(*in2)); - in2->sin_family = AF_INET; - in2->sin_addr.s_addr = htonl((127<<24) | iface); - in2->sin_port = htons(prt); - - *len = sizeof(*in2); - break; - } -#ifdef HAVE_IPV6 - case SOCKET_TYPE_CHAR_TCP_V6: - case SOCKET_TYPE_CHAR_UDP_V6: { - struct sockaddr_in6 *in2 = (struct sockaddr_in6 *)in; - - if ((*len) < sizeof(*in2)) { - errno = EINVAL; - return -1; - } - - memset(in2, 0, sizeof(*in2)); - in2->sin6_family = AF_INET6; - in2->sin6_addr.s6_addr[0] = SW_IPV6_ADDRESS; - in2->sin6_port = htons(prt); - - *len = sizeof(*in2); - break; - } -#endif - default: - errno = EINVAL; - return -1; - } - - return 0; -} - -static int convert_in_un_remote(struct socket_info *si, const struct sockaddr *inaddr, struct sockaddr_un *un, - int *bcast) -{ - char type = '\0'; - unsigned int prt; - unsigned int iface; - int is_bcast = 0; - - if (bcast) *bcast = 0; - - switch (si->family) { - case AF_INET: { - const struct sockaddr_in *in = - (const struct sockaddr_in *)inaddr; - unsigned int addr = ntohl(in->sin_addr.s_addr); - char u_type = '\0'; - char b_type = '\0'; - char a_type = '\0'; - - switch (si->type) { - case SOCK_STREAM: - u_type = SOCKET_TYPE_CHAR_TCP; - break; - case SOCK_DGRAM: - u_type = SOCKET_TYPE_CHAR_UDP; - a_type = SOCKET_TYPE_CHAR_UDP; - b_type = SOCKET_TYPE_CHAR_UDP; - break; - } - - prt = ntohs(in->sin_port); - if (a_type && addr == 0xFFFFFFFF) { - /* 255.255.255.255 only udp */ - is_bcast = 2; - type = a_type; - iface = socket_wrapper_default_iface(); - } else if (b_type && addr == 0x7FFFFFFF) { - /* 127.255.255.255 only udp */ - is_bcast = 1; - type = b_type; - iface = socket_wrapper_default_iface(); - } else if ((addr & 0xFFFFFF00) == 0x7F000000) { - /* 127.0.0.X */ - is_bcast = 0; - type = u_type; - iface = (addr & 0x000000FF); - } else { - errno = ENETUNREACH; - return -1; - } - if (bcast) *bcast = is_bcast; - break; - } -#ifdef HAVE_IPV6 - case AF_INET6: { - const struct sockaddr_in6 *in = - (const struct sockaddr_in6 *)inaddr; - - switch (si->type) { - case SOCK_STREAM: - type = SOCKET_TYPE_CHAR_TCP_V6; - break; - case SOCK_DGRAM: - type = SOCKET_TYPE_CHAR_UDP_V6; - break; - } - - /* XXX no multicast/broadcast */ - - prt = ntohs(in->sin6_port); - iface = SW_IPV6_ADDRESS; - - break; - } -#endif - default: - errno = ENETUNREACH; - return -1; - } - - if (prt == 0) { - errno = EINVAL; - return -1; - } - - if (is_bcast) { - snprintf(un->sun_path, sizeof(un->sun_path), "%s/EINVAL", - socket_wrapper_dir()); - /* the caller need to do more processing */ - return 0; - } - - snprintf(un->sun_path, sizeof(un->sun_path), "%s/"SOCKET_FORMAT, - socket_wrapper_dir(), type, iface, prt); - - return 0; -} - -static int convert_in_un_alloc(struct socket_info *si, const struct sockaddr *inaddr, struct sockaddr_un *un, - int *bcast) -{ - char type = '\0'; - unsigned int prt; - unsigned int iface; - struct stat st; - int is_bcast = 0; - - if (bcast) *bcast = 0; - - switch (si->family) { - case AF_INET: { - const struct sockaddr_in *in = - (const struct sockaddr_in *)inaddr; - unsigned int addr = ntohl(in->sin_addr.s_addr); - char u_type = '\0'; - char d_type = '\0'; - char b_type = '\0'; - char a_type = '\0'; - - prt = ntohs(in->sin_port); - - switch (si->type) { - case SOCK_STREAM: - u_type = SOCKET_TYPE_CHAR_TCP; - d_type = SOCKET_TYPE_CHAR_TCP; - break; - case SOCK_DGRAM: - u_type = SOCKET_TYPE_CHAR_UDP; - d_type = SOCKET_TYPE_CHAR_UDP; - a_type = SOCKET_TYPE_CHAR_UDP; - b_type = SOCKET_TYPE_CHAR_UDP; - break; - } - - if (addr == 0) { - /* 0.0.0.0 */ - is_bcast = 0; - type = d_type; - iface = socket_wrapper_default_iface(); - } else if (a_type && addr == 0xFFFFFFFF) { - /* 255.255.255.255 only udp */ - is_bcast = 2; - type = a_type; - iface = socket_wrapper_default_iface(); - } else if (b_type && addr == 0x7FFFFFFF) { - /* 127.255.255.255 only udp */ - is_bcast = 1; - type = b_type; - iface = socket_wrapper_default_iface(); - } else if ((addr & 0xFFFFFF00) == 0x7F000000) { - /* 127.0.0.X */ - is_bcast = 0; - type = u_type; - iface = (addr & 0x000000FF); - } else { - errno = EADDRNOTAVAIL; - return -1; - } - break; - } -#ifdef HAVE_IPV6 - case AF_INET6: { - const struct sockaddr_in6 *in = - (const struct sockaddr_in6 *)inaddr; - - switch (si->type) { - case SOCK_STREAM: - type = SOCKET_TYPE_CHAR_TCP_V6; - break; - case SOCK_DGRAM: - type = SOCKET_TYPE_CHAR_UDP_V6; - break; - } - - /* XXX no multicast/broadcast */ - - prt = ntohs(in->sin6_port); - iface = SW_IPV6_ADDRESS; - - break; - } -#endif - default: - errno = ENETUNREACH; - return -1; - } - - - if (bcast) *bcast = is_bcast; - - if (prt == 0) { - /* handle auto-allocation of ephemeral ports */ - for (prt = 5001; prt < 10000; prt++) { - snprintf(un->sun_path, sizeof(un->sun_path), "%s/"SOCKET_FORMAT, - socket_wrapper_dir(), type, iface, prt); - if (stat(un->sun_path, &st) == 0) continue; - - set_port(si->family, prt, si->myname); - break; - } - if (prt == 10000) { - errno = ENFILE; - return -1; - } - } - - snprintf(un->sun_path, sizeof(un->sun_path), "%s/"SOCKET_FORMAT, - socket_wrapper_dir(), type, iface, prt); - return 0; -} - -static struct socket_info *find_socket_info(int fd) -{ - struct socket_info *i; - for (i = sockets; i; i = i->next) { - if (i->fd == fd) - return i; - } - - return NULL; -} - -static int sockaddr_convert_to_un(struct socket_info *si, const struct sockaddr *in_addr, socklen_t in_len, - struct sockaddr_un *out_addr, int alloc_sock, int *bcast) -{ - if (!out_addr) - return 0; - - out_addr->sun_family = AF_UNIX; - - switch (in_addr->sa_family) { - case AF_INET: -#ifdef HAVE_IPV6 - case AF_INET6: -#endif - switch (si->type) { - case SOCK_STREAM: - case SOCK_DGRAM: - break; - default: - errno = ESOCKTNOSUPPORT; - return -1; - } - if (alloc_sock) { - return convert_in_un_alloc(si, in_addr, out_addr, bcast); - } else { - return convert_in_un_remote(si, in_addr, out_addr, bcast); - } - default: - break; - } - - errno = EAFNOSUPPORT; - return -1; -} - -static int sockaddr_convert_from_un(const struct socket_info *si, - const struct sockaddr_un *in_addr, - socklen_t un_addrlen, - int family, - struct sockaddr *out_addr, - socklen_t *out_addrlen) -{ - if (out_addr == NULL || out_addrlen == NULL) - return 0; - - if (un_addrlen == 0) { - *out_addrlen = 0; - return 0; - } - - switch (family) { - case AF_INET: -#ifdef HAVE_IPV6 - case AF_INET6: -#endif - switch (si->type) { - case SOCK_STREAM: - case SOCK_DGRAM: - break; - default: - errno = ESOCKTNOSUPPORT; - return -1; - } - return convert_un_in(in_addr, out_addr, out_addrlen); - default: - break; - } - - errno = EAFNOSUPPORT; - return -1; -} - -enum swrap_packet_type { - SWRAP_CONNECT_SEND, - SWRAP_CONNECT_UNREACH, - SWRAP_CONNECT_RECV, - SWRAP_CONNECT_ACK, - SWRAP_ACCEPT_SEND, - SWRAP_ACCEPT_RECV, - SWRAP_ACCEPT_ACK, - SWRAP_RECVFROM, - SWRAP_SENDTO, - SWRAP_SENDTO_UNREACH, - SWRAP_PENDING_RST, - SWRAP_RECV, - SWRAP_RECV_RST, - SWRAP_SEND, - SWRAP_SEND_RST, - SWRAP_CLOSE_SEND, - SWRAP_CLOSE_RECV, - SWRAP_CLOSE_ACK -}; - -struct swrap_file_hdr { - uint32_t magic; - uint16_t version_major; - uint16_t version_minor; - int32_t timezone; - uint32_t sigfigs; - uint32_t frame_max_len; -#define SWRAP_FRAME_LENGTH_MAX 0xFFFF - uint32_t link_type; -}; -#define SWRAP_FILE_HDR_SIZE 24 - -struct swrap_packet { - struct { - uint32_t seconds; - uint32_t micro_seconds; - uint32_t recorded_length; - uint32_t full_length; - } frame; -#define SWRAP_PACKET__FRAME_SIZE 16 - - struct { - struct { - uint8_t ver_hdrlen; - uint8_t tos; - uint16_t packet_length; - uint16_t identification; - uint8_t flags; - uint8_t fragment; - uint8_t ttl; - uint8_t protocol; - uint16_t hdr_checksum; - uint32_t src_addr; - uint32_t dest_addr; - } hdr; -#define SWRAP_PACKET__IP_HDR_SIZE 20 - - union { - struct { - uint16_t source_port; - uint16_t dest_port; - uint32_t seq_num; - uint32_t ack_num; - uint8_t hdr_length; - uint8_t control; - uint16_t window; - uint16_t checksum; - uint16_t urg; - } tcp; -#define SWRAP_PACKET__IP_P_TCP_SIZE 20 - struct { - uint16_t source_port; - uint16_t dest_port; - uint16_t length; - uint16_t checksum; - } udp; -#define SWRAP_PACKET__IP_P_UDP_SIZE 8 - struct { - uint8_t type; - uint8_t code; - uint16_t checksum; - uint32_t unused; - } icmp; -#define SWRAP_PACKET__IP_P_ICMP_SIZE 8 - } p; - } ip; -}; -#define SWRAP_PACKET_SIZE 56 - -static const char *socket_wrapper_pcap_file(void) -{ - static int initialized = 0; - static const char *s = NULL; - static const struct swrap_file_hdr h = { 0, }; - static const struct swrap_packet p = { { 0, }, { { 0, }, { { 0, } } } }; - - if (initialized == 1) { - return s; - } - initialized = 1; - - /* - * TODO: don't use the structs use plain buffer offsets - * and PUSH_U8(), PUSH_U16() and PUSH_U32() - * - * for now make sure we disable PCAP support - * if the struct has alignment! - */ - if (sizeof(h) != SWRAP_FILE_HDR_SIZE) { - return NULL; - } - if (sizeof(p) != SWRAP_PACKET_SIZE) { - return NULL; - } - if (sizeof(p.frame) != SWRAP_PACKET__FRAME_SIZE) { - return NULL; - } - if (sizeof(p.ip.hdr) != SWRAP_PACKET__IP_HDR_SIZE) { - return NULL; - } - if (sizeof(p.ip.p.tcp) != SWRAP_PACKET__IP_P_TCP_SIZE) { - return NULL; - } - if (sizeof(p.ip.p.udp) != SWRAP_PACKET__IP_P_UDP_SIZE) { - return NULL; - } - if (sizeof(p.ip.p.icmp) != SWRAP_PACKET__IP_P_ICMP_SIZE) { - return NULL; - } - - s = getenv("SOCKET_WRAPPER_PCAP_FILE"); - if (s == NULL) { - return NULL; - } - if (strncmp(s, "./", 2) == 0) { - s += 2; - } - return s; -} - -static struct swrap_packet *swrap_packet_init(struct timeval *tval, - const struct sockaddr_in *src_addr, - const struct sockaddr_in *dest_addr, - int socket_type, - const unsigned char *payload, - size_t payload_len, - unsigned long tcp_seq, - unsigned long tcp_ack, - unsigned char tcp_ctl, - int unreachable, - size_t *_packet_len) -{ - struct swrap_packet *ret; - struct swrap_packet *packet; - size_t packet_len; - size_t alloc_len; - size_t nonwire_len = sizeof(packet->frame); - size_t wire_hdr_len = 0; - size_t wire_len = 0; - size_t icmp_hdr_len = 0; - size_t icmp_truncate_len = 0; - unsigned char protocol = 0, icmp_protocol = 0; - unsigned short src_port = src_addr->sin_port; - unsigned short dest_port = dest_addr->sin_port; - - switch (socket_type) { - case SOCK_STREAM: - protocol = 0x06; /* TCP */ - wire_hdr_len = sizeof(packet->ip.hdr) + sizeof(packet->ip.p.tcp); - wire_len = wire_hdr_len + payload_len; - break; - - case SOCK_DGRAM: - protocol = 0x11; /* UDP */ - wire_hdr_len = sizeof(packet->ip.hdr) + sizeof(packet->ip.p.udp); - wire_len = wire_hdr_len + payload_len; - break; - - default: - return NULL; - } - - if (unreachable) { - icmp_protocol = protocol; - protocol = 0x01; /* ICMP */ - if (wire_len > 64 ) { - icmp_truncate_len = wire_len - 64; - } - icmp_hdr_len = sizeof(packet->ip.hdr) + sizeof(packet->ip.p.icmp); - wire_hdr_len += icmp_hdr_len; - wire_len += icmp_hdr_len; - } - - packet_len = nonwire_len + wire_len; - alloc_len = packet_len; - if (alloc_len < sizeof(struct swrap_packet)) { - alloc_len = sizeof(struct swrap_packet); - } - ret = (struct swrap_packet *)malloc(alloc_len); - if (!ret) return NULL; - - packet = ret; - - packet->frame.seconds = tval->tv_sec; - packet->frame.micro_seconds = tval->tv_usec; - packet->frame.recorded_length = wire_len - icmp_truncate_len; - packet->frame.full_length = wire_len - icmp_truncate_len; - - packet->ip.hdr.ver_hdrlen = 0x45; /* version 4 and 5 * 32 bit words */ - packet->ip.hdr.tos = 0x00; - packet->ip.hdr.packet_length = htons(wire_len - icmp_truncate_len); - packet->ip.hdr.identification = htons(0xFFFF); - packet->ip.hdr.flags = 0x40; /* BIT 1 set - means don't fraqment */ - packet->ip.hdr.fragment = htons(0x0000); - packet->ip.hdr.ttl = 0xFF; - packet->ip.hdr.protocol = protocol; - packet->ip.hdr.hdr_checksum = htons(0x0000); - packet->ip.hdr.src_addr = src_addr->sin_addr.s_addr; - packet->ip.hdr.dest_addr = dest_addr->sin_addr.s_addr; - - if (unreachable) { - packet->ip.p.icmp.type = 0x03; /* destination unreachable */ - packet->ip.p.icmp.code = 0x01; /* host unreachable */ - packet->ip.p.icmp.checksum = htons(0x0000); - packet->ip.p.icmp.unused = htonl(0x00000000); - - /* set the ip header in the ICMP payload */ - packet = (struct swrap_packet *)(((unsigned char *)ret) + icmp_hdr_len); - packet->ip.hdr.ver_hdrlen = 0x45; /* version 4 and 5 * 32 bit words */ - packet->ip.hdr.tos = 0x00; - packet->ip.hdr.packet_length = htons(wire_len - icmp_hdr_len); - packet->ip.hdr.identification = htons(0xFFFF); - packet->ip.hdr.flags = 0x40; /* BIT 1 set - means don't fraqment */ - packet->ip.hdr.fragment = htons(0x0000); - packet->ip.hdr.ttl = 0xFF; - packet->ip.hdr.protocol = icmp_protocol; - packet->ip.hdr.hdr_checksum = htons(0x0000); - packet->ip.hdr.src_addr = dest_addr->sin_addr.s_addr; - packet->ip.hdr.dest_addr = src_addr->sin_addr.s_addr; - - src_port = dest_addr->sin_port; - dest_port = src_addr->sin_port; - } - - switch (socket_type) { - case SOCK_STREAM: - packet->ip.p.tcp.source_port = src_port; - packet->ip.p.tcp.dest_port = dest_port; - packet->ip.p.tcp.seq_num = htonl(tcp_seq); - packet->ip.p.tcp.ack_num = htonl(tcp_ack); - packet->ip.p.tcp.hdr_length = 0x50; /* 5 * 32 bit words */ - packet->ip.p.tcp.control = tcp_ctl; - packet->ip.p.tcp.window = htons(0x7FFF); - packet->ip.p.tcp.checksum = htons(0x0000); - packet->ip.p.tcp.urg = htons(0x0000); - - break; - - case SOCK_DGRAM: - packet->ip.p.udp.source_port = src_addr->sin_port; - packet->ip.p.udp.dest_port = dest_addr->sin_port; - packet->ip.p.udp.length = htons(8 + payload_len); - packet->ip.p.udp.checksum = htons(0x0000); - - break; - } - - if (payload && payload_len > 0) { - unsigned char *p = (unsigned char *)ret; - p += nonwire_len; - p += wire_hdr_len; - memcpy(p, payload, payload_len); - } - - *_packet_len = packet_len - icmp_truncate_len; - return ret; -} - -static int swrap_get_pcap_fd(const char *fname) -{ - static int fd = -1; - - if (fd != -1) return fd; - - fd = open(fname, O_WRONLY|O_CREAT|O_EXCL|O_APPEND, 0644); - if (fd != -1) { - struct swrap_file_hdr file_hdr; - file_hdr.magic = 0xA1B2C3D4; - file_hdr.version_major = 0x0002; - file_hdr.version_minor = 0x0004; - file_hdr.timezone = 0x00000000; - file_hdr.sigfigs = 0x00000000; - file_hdr.frame_max_len = SWRAP_FRAME_LENGTH_MAX; - file_hdr.link_type = 0x0065; /* 101 RAW IP */ - - write(fd, &file_hdr, sizeof(file_hdr)); - return fd; - } - - fd = open(fname, O_WRONLY|O_APPEND, 0644); - - return fd; -} - -static struct swrap_packet *swrap_marshall_packet(struct socket_info *si, - const struct sockaddr *addr, - enum swrap_packet_type type, - const void *buf, size_t len, - size_t *packet_len) -{ - const struct sockaddr_in *src_addr; - const struct sockaddr_in *dest_addr; - unsigned long tcp_seq = 0; - unsigned long tcp_ack = 0; - unsigned char tcp_ctl = 0; - int unreachable = 0; - - struct timeval tv; - - switch (si->family) { - case AF_INET: - break; - default: - return NULL; - } - - switch (type) { - case SWRAP_CONNECT_SEND: - if (si->type != SOCK_STREAM) return NULL; - - src_addr = (const struct sockaddr_in *)si->myname; - dest_addr = (const struct sockaddr_in *)addr; - - tcp_seq = si->io.pck_snd; - tcp_ack = si->io.pck_rcv; - tcp_ctl = 0x02; /* SYN */ - - si->io.pck_snd += 1; - - break; - - case SWRAP_CONNECT_RECV: - if (si->type != SOCK_STREAM) return NULL; - - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)addr; - - tcp_seq = si->io.pck_rcv; - tcp_ack = si->io.pck_snd; - tcp_ctl = 0x12; /** SYN,ACK */ - - si->io.pck_rcv += 1; - - break; - - case SWRAP_CONNECT_UNREACH: - if (si->type != SOCK_STREAM) return NULL; - - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)addr; - - /* Unreachable: resend the data of SWRAP_CONNECT_SEND */ - tcp_seq = si->io.pck_snd - 1; - tcp_ack = si->io.pck_rcv; - tcp_ctl = 0x02; /* SYN */ - unreachable = 1; - - break; - - case SWRAP_CONNECT_ACK: - if (si->type != SOCK_STREAM) return NULL; - - src_addr = (const struct sockaddr_in *)si->myname; - dest_addr = (const struct sockaddr_in *)addr; - - tcp_seq = si->io.pck_snd; - tcp_ack = si->io.pck_rcv; - tcp_ctl = 0x10; /* ACK */ - - break; - - case SWRAP_ACCEPT_SEND: - if (si->type != SOCK_STREAM) return NULL; - - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)addr; - - tcp_seq = si->io.pck_rcv; - tcp_ack = si->io.pck_snd; - tcp_ctl = 0x02; /* SYN */ - - si->io.pck_rcv += 1; - - break; - - case SWRAP_ACCEPT_RECV: - if (si->type != SOCK_STREAM) return NULL; - - src_addr = (const struct sockaddr_in *)si->myname; - dest_addr = (const struct sockaddr_in *)addr; - - tcp_seq = si->io.pck_snd; - tcp_ack = si->io.pck_rcv; - tcp_ctl = 0x12; /* SYN,ACK */ - - si->io.pck_snd += 1; - - break; - - case SWRAP_ACCEPT_ACK: - if (si->type != SOCK_STREAM) return NULL; - - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)addr; - - tcp_seq = si->io.pck_rcv; - tcp_ack = si->io.pck_snd; - tcp_ctl = 0x10; /* ACK */ - - break; - - case SWRAP_SEND: - src_addr = (const struct sockaddr_in *)si->myname; - dest_addr = (const struct sockaddr_in *)si->peername; - - tcp_seq = si->io.pck_snd; - tcp_ack = si->io.pck_rcv; - tcp_ctl = 0x18; /* PSH,ACK */ - - si->io.pck_snd += len; - - break; - - case SWRAP_SEND_RST: - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)si->peername; - - if (si->type == SOCK_DGRAM) { - return swrap_marshall_packet(si, si->peername, - SWRAP_SENDTO_UNREACH, - buf, len, packet_len); - } - - tcp_seq = si->io.pck_rcv; - tcp_ack = si->io.pck_snd; - tcp_ctl = 0x14; /** RST,ACK */ - - break; - - case SWRAP_PENDING_RST: - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)si->peername; - - if (si->type == SOCK_DGRAM) { - return NULL; - } - - tcp_seq = si->io.pck_rcv; - tcp_ack = si->io.pck_snd; - tcp_ctl = 0x14; /* RST,ACK */ - - break; - - case SWRAP_RECV: - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)si->peername; - - tcp_seq = si->io.pck_rcv; - tcp_ack = si->io.pck_snd; - tcp_ctl = 0x18; /* PSH,ACK */ - - si->io.pck_rcv += len; - - break; - - case SWRAP_RECV_RST: - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)si->peername; - - if (si->type == SOCK_DGRAM) { - return NULL; - } - - tcp_seq = si->io.pck_rcv; - tcp_ack = si->io.pck_snd; - tcp_ctl = 0x14; /* RST,ACK */ - - break; - - case SWRAP_SENDTO: - src_addr = (const struct sockaddr_in *)si->myname; - dest_addr = (const struct sockaddr_in *)addr; - - si->io.pck_snd += len; - - break; - - case SWRAP_SENDTO_UNREACH: - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)addr; - - unreachable = 1; - - break; - - case SWRAP_RECVFROM: - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)addr; - - si->io.pck_rcv += len; - - break; - - case SWRAP_CLOSE_SEND: - if (si->type != SOCK_STREAM) return NULL; - - src_addr = (const struct sockaddr_in *)si->myname; - dest_addr = (const struct sockaddr_in *)si->peername; - - tcp_seq = si->io.pck_snd; - tcp_ack = si->io.pck_rcv; - tcp_ctl = 0x11; /* FIN, ACK */ - - si->io.pck_snd += 1; - - break; - - case SWRAP_CLOSE_RECV: - if (si->type != SOCK_STREAM) return NULL; - - dest_addr = (const struct sockaddr_in *)si->myname; - src_addr = (const struct sockaddr_in *)si->peername; - - tcp_seq = si->io.pck_rcv; - tcp_ack = si->io.pck_snd; - tcp_ctl = 0x11; /* FIN,ACK */ - - si->io.pck_rcv += 1; - - break; - - case SWRAP_CLOSE_ACK: - if (si->type != SOCK_STREAM) return NULL; - - src_addr = (const struct sockaddr_in *)si->myname; - dest_addr = (const struct sockaddr_in *)si->peername; - - tcp_seq = si->io.pck_snd; - tcp_ack = si->io.pck_rcv; - tcp_ctl = 0x10; /* ACK */ - - break; - default: - return NULL; - } - - swrapGetTimeOfDay(&tv); - - return swrap_packet_init(&tv, src_addr, dest_addr, si->type, - (const unsigned char *)buf, len, - tcp_seq, tcp_ack, tcp_ctl, unreachable, - packet_len); -} - -static void swrap_dump_packet(struct socket_info *si, - const struct sockaddr *addr, - enum swrap_packet_type type, - const void *buf, size_t len) -{ - const char *file_name; - struct swrap_packet *packet; - size_t packet_len = 0; - int fd; - - file_name = socket_wrapper_pcap_file(); - if (!file_name) { - return; - } - - packet = swrap_marshall_packet(si, addr, type, buf, len, &packet_len); - if (!packet) { - return; - } - - fd = swrap_get_pcap_fd(file_name); - if (fd != -1) { - write(fd, packet, packet_len); - } - - free(packet); -} - -_PUBLIC_ int swrap_socket(int family, int type, int protocol) -{ - struct socket_info *si; - int fd; - - if (!socket_wrapper_dir()) { - return real_socket(family, type, protocol); - } - - switch (family) { - case AF_INET: -#ifdef HAVE_IPV6 - case AF_INET6: -#endif - break; - case AF_UNIX: - return real_socket(family, type, protocol); - default: - errno = EAFNOSUPPORT; - return -1; - } - - switch (type) { - case SOCK_STREAM: - break; - case SOCK_DGRAM: - break; - default: - errno = EPROTONOSUPPORT; - return -1; - } - - switch (protocol) { - case 0: - break; - case 6: - if (type == SOCK_STREAM) { - break; - } - /*fall through*/ - case 17: - if (type == SOCK_DGRAM) { - break; - } - /*fall through*/ - default: - errno = EPROTONOSUPPORT; - return -1; - } - - fd = real_socket(AF_UNIX, type, 0); - - if (fd == -1) return -1; - - si = (struct socket_info *)calloc(1, sizeof(struct socket_info)); - - si->family = family; - si->type = type; - si->protocol = protocol; - si->fd = fd; - - SWRAP_DLIST_ADD(sockets, si); - - return si->fd; -} - -_PUBLIC_ int swrap_accept(int s, struct sockaddr *addr, socklen_t *addrlen) -{ - struct socket_info *parent_si, *child_si; - int fd; - struct sockaddr_un un_addr; - socklen_t un_addrlen = sizeof(un_addr); - struct sockaddr_un un_my_addr; - socklen_t un_my_addrlen = sizeof(un_my_addr); - struct sockaddr *my_addr; - socklen_t my_addrlen, len; - int ret; - - parent_si = find_socket_info(s); - if (!parent_si) { - return real_accept(s, addr, addrlen); - } - - /* - * assume out sockaddr have the same size as the in parent - * socket family - */ - my_addrlen = socket_length(parent_si->family); - if (my_addrlen <= 0) { - errno = EINVAL; - return -1; - } - - my_addr = (struct sockaddr *)malloc(my_addrlen); - if (my_addr == NULL) { - return -1; - } - - memset(&un_addr, 0, sizeof(un_addr)); - memset(&un_my_addr, 0, sizeof(un_my_addr)); - - ret = real_accept(s, (struct sockaddr *)&un_addr, &un_addrlen); - if (ret == -1) { - free(my_addr); - return ret; - } - - fd = ret; - - len = my_addrlen; - ret = sockaddr_convert_from_un(parent_si, &un_addr, un_addrlen, - parent_si->family, my_addr, &len); - if (ret == -1) { - free(my_addr); - close(fd); - return ret; - } - - child_si = (struct socket_info *)malloc(sizeof(struct socket_info)); - memset(child_si, 0, sizeof(*child_si)); - - child_si->fd = fd; - child_si->family = parent_si->family; - child_si->type = parent_si->type; - child_si->protocol = parent_si->protocol; - child_si->bound = 1; - child_si->is_server = 1; - - child_si->peername_len = len; - child_si->peername = sockaddr_dup(my_addr, len); - - if (addr != NULL && addrlen != NULL) { - *addrlen = len; - if (*addrlen >= len) - memcpy(addr, my_addr, len); - *addrlen = 0; - } - - ret = real_getsockname(fd, (struct sockaddr *)&un_my_addr, &un_my_addrlen); - if (ret == -1) { - free(child_si); - close(fd); - return ret; - } - - len = my_addrlen; - ret = sockaddr_convert_from_un(child_si, &un_my_addr, un_my_addrlen, - child_si->family, my_addr, &len); - if (ret == -1) { - free(child_si); - free(my_addr); - close(fd); - return ret; - } - - child_si->myname_len = len; - child_si->myname = sockaddr_dup(my_addr, len); - free(my_addr); - - SWRAP_DLIST_ADD(sockets, child_si); - - swrap_dump_packet(child_si, addr, SWRAP_ACCEPT_SEND, NULL, 0); - swrap_dump_packet(child_si, addr, SWRAP_ACCEPT_RECV, NULL, 0); - swrap_dump_packet(child_si, addr, SWRAP_ACCEPT_ACK, NULL, 0); - - return fd; -} - -static int autobind_start_init; -static int autobind_start; - -/* using sendto() or connect() on an unbound socket would give the - recipient no way to reply, as unlike UDP and TCP, a unix domain - socket can't auto-assign emphemeral port numbers, so we need to - assign it here */ -static int swrap_auto_bind(struct socket_info *si) -{ - struct sockaddr_un un_addr; - int i; - char type; - int ret; - int port; - struct stat st; - - if (autobind_start_init != 1) { - autobind_start_init = 1; - autobind_start = getpid(); - autobind_start %= 50000; - autobind_start += 10000; - } - - un_addr.sun_family = AF_UNIX; - - switch (si->family) { - case AF_INET: { - struct sockaddr_in in; - - switch (si->type) { - case SOCK_STREAM: - type = SOCKET_TYPE_CHAR_TCP; - break; - case SOCK_DGRAM: - type = SOCKET_TYPE_CHAR_UDP; - break; - default: - errno = ESOCKTNOSUPPORT; - return -1; - } - - memset(&in, 0, sizeof(in)); - in.sin_family = AF_INET; - in.sin_addr.s_addr = htonl(127<<24 | - socket_wrapper_default_iface()); - - si->myname_len = sizeof(in); - si->myname = sockaddr_dup(&in, si->myname_len); - break; - } -#ifdef HAVE_IPV6 - case AF_INET6: { - struct sockaddr_in6 in6; - - switch (si->type) { - case SOCK_STREAM: - type = SOCKET_TYPE_CHAR_TCP_V6; - break; - case SOCK_DGRAM: - type = SOCKET_TYPE_CHAR_UDP_V6; - break; - default: - errno = ESOCKTNOSUPPORT; - return -1; - } - - memset(&in6, 0, sizeof(in6)); - in6.sin6_family = AF_INET6; - in6.sin6_addr.s6_addr[0] = SW_IPV6_ADDRESS; - si->myname_len = sizeof(in6); - si->myname = sockaddr_dup(&in6, si->myname_len); - break; - } -#endif - default: - errno = ESOCKTNOSUPPORT; - return -1; - } - - if (autobind_start > 60000) { - autobind_start = 10000; - } - - for (i=0;i<1000;i++) { - port = autobind_start + i; - snprintf(un_addr.sun_path, sizeof(un_addr.sun_path), - "%s/"SOCKET_FORMAT, socket_wrapper_dir(), - type, socket_wrapper_default_iface(), port); - if (stat(un_addr.sun_path, &st) == 0) continue; - - ret = real_bind(si->fd, (struct sockaddr *)&un_addr, sizeof(un_addr)); - if (ret == -1) return ret; - - si->tmp_path = strdup(un_addr.sun_path); - si->bound = 1; - autobind_start = port + 1; - break; - } - if (i == 1000) { - errno = ENFILE; - return -1; - } - - set_port(si->family, port, si->myname); - - return 0; -} - - -_PUBLIC_ int swrap_connect(int s, const struct sockaddr *serv_addr, socklen_t addrlen) -{ - int ret; - struct sockaddr_un un_addr; - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_connect(s, serv_addr, addrlen); - } - - if (si->bound == 0) { - ret = swrap_auto_bind(si); - if (ret == -1) return -1; - } - - if (si->family != serv_addr->sa_family) { - errno = EINVAL; - return -1; - } - - ret = sockaddr_convert_to_un(si, (const struct sockaddr *)serv_addr, addrlen, &un_addr, 0, NULL); - if (ret == -1) return -1; - - swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_SEND, NULL, 0); - - ret = real_connect(s, (struct sockaddr *)&un_addr, - sizeof(struct sockaddr_un)); - - /* to give better errors */ - if (ret == -1 && errno == ENOENT) { - errno = EHOSTUNREACH; - } - - if (ret == 0) { - si->peername_len = addrlen; - si->peername = sockaddr_dup(serv_addr, addrlen); - - swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_RECV, NULL, 0); - swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_ACK, NULL, 0); - } else { - swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_UNREACH, NULL, 0); - } - - return ret; -} - -_PUBLIC_ int swrap_bind(int s, const struct sockaddr *myaddr, socklen_t addrlen) -{ - int ret; - struct sockaddr_un un_addr; - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_bind(s, myaddr, addrlen); - } - - si->myname_len = addrlen; - si->myname = sockaddr_dup(myaddr, addrlen); - - ret = sockaddr_convert_to_un(si, (const struct sockaddr *)myaddr, addrlen, &un_addr, 1, &si->bcast); - if (ret == -1) return -1; - - unlink(un_addr.sun_path); - - ret = real_bind(s, (struct sockaddr *)&un_addr, - sizeof(struct sockaddr_un)); - - if (ret == 0) { - si->bound = 1; - } - - return ret; -} - -_PUBLIC_ int swrap_listen(int s, int backlog) -{ - int ret; - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_listen(s, backlog); - } - - ret = real_listen(s, backlog); - - return ret; -} - -_PUBLIC_ int swrap_getpeername(int s, struct sockaddr *name, socklen_t *addrlen) -{ - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_getpeername(s, name, addrlen); - } - - if (!si->peername) - { - errno = ENOTCONN; - return -1; - } - - memcpy(name, si->peername, si->peername_len); - *addrlen = si->peername_len; - - return 0; -} - -_PUBLIC_ int swrap_getsockname(int s, struct sockaddr *name, socklen_t *addrlen) -{ - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_getsockname(s, name, addrlen); - } - - memcpy(name, si->myname, si->myname_len); - *addrlen = si->myname_len; - - return 0; -} - -_PUBLIC_ int swrap_getsockopt(int s, int level, int optname, void *optval, socklen_t *optlen) -{ - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_getsockopt(s, level, optname, optval, optlen); - } - - if (level == SOL_SOCKET) { - return real_getsockopt(s, level, optname, optval, optlen); - } - - errno = ENOPROTOOPT; - return -1; -} - -_PUBLIC_ int swrap_setsockopt(int s, int level, int optname, const void *optval, socklen_t optlen) -{ - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_setsockopt(s, level, optname, optval, optlen); - } - - if (level == SOL_SOCKET) { - return real_setsockopt(s, level, optname, optval, optlen); - } - - switch (si->family) { - case AF_INET: - return 0; - default: - errno = ENOPROTOOPT; - return -1; - } -} - -_PUBLIC_ ssize_t swrap_recvfrom(int s, void *buf, size_t len, int flags, struct sockaddr *from, socklen_t *fromlen) -{ - struct sockaddr_un un_addr; - socklen_t un_addrlen = sizeof(un_addr); - int ret; - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_recvfrom(s, buf, len, flags, from, fromlen); - } - - len = MIN(len, 1500); - - /* irix 6.4 forgets to null terminate the sun_path string :-( */ - memset(&un_addr, 0, sizeof(un_addr)); - ret = real_recvfrom(s, buf, len, flags, (struct sockaddr *)&un_addr, &un_addrlen); - if (ret == -1) - return ret; - - if (sockaddr_convert_from_un(si, &un_addr, un_addrlen, - si->family, from, fromlen) == -1) { - return -1; - } - - swrap_dump_packet(si, from, SWRAP_RECVFROM, buf, ret); - - return ret; -} - - -_PUBLIC_ ssize_t swrap_sendto(int s, const void *buf, size_t len, int flags, const struct sockaddr *to, socklen_t tolen) -{ - struct sockaddr_un un_addr; - int ret; - struct socket_info *si = find_socket_info(s); - int bcast = 0; - - if (!si) { - return real_sendto(s, buf, len, flags, to, tolen); - } - - len = MIN(len, 1500); - - switch (si->type) { - case SOCK_STREAM: - ret = real_send(s, buf, len, flags); - break; - case SOCK_DGRAM: - if (si->bound == 0) { - ret = swrap_auto_bind(si); - if (ret == -1) return -1; - } - - ret = sockaddr_convert_to_un(si, to, tolen, &un_addr, 0, &bcast); - if (ret == -1) return -1; - - if (bcast) { - struct stat st; - unsigned int iface; - unsigned int prt = ntohs(((const struct sockaddr_in *)to)->sin_port); - char type; - - type = SOCKET_TYPE_CHAR_UDP; - - for(iface=0; iface <= MAX_WRAPPED_INTERFACES; iface++) { - snprintf(un_addr.sun_path, sizeof(un_addr.sun_path), "%s/"SOCKET_FORMAT, - socket_wrapper_dir(), type, iface, prt); - if (stat(un_addr.sun_path, &st) != 0) continue; - - /* ignore the any errors in broadcast sends */ - real_sendto(s, buf, len, flags, (struct sockaddr *)&un_addr, sizeof(un_addr)); - } - - swrap_dump_packet(si, to, SWRAP_SENDTO, buf, len); - - return len; - } - - ret = real_sendto(s, buf, len, flags, (struct sockaddr *)&un_addr, sizeof(un_addr)); - break; - default: - ret = -1; - errno = EHOSTUNREACH; - break; - } - - /* to give better errors */ - if (ret == -1 && errno == ENOENT) { - errno = EHOSTUNREACH; - } - - if (ret == -1) { - swrap_dump_packet(si, to, SWRAP_SENDTO, buf, len); - swrap_dump_packet(si, to, SWRAP_SENDTO_UNREACH, buf, len); - } else { - swrap_dump_packet(si, to, SWRAP_SENDTO, buf, ret); - } - - return ret; -} - -_PUBLIC_ int swrap_ioctl(int s, int r, void *p) -{ - int ret; - struct socket_info *si = find_socket_info(s); - int value; - - if (!si) { - return real_ioctl(s, r, p); - } - - ret = real_ioctl(s, r, p); - - switch (r) { - case FIONREAD: - value = *((int *)p); - if (ret == -1 && errno != EAGAIN && errno != ENOBUFS) { - swrap_dump_packet(si, NULL, SWRAP_PENDING_RST, NULL, 0); - } else if (value == 0) { /* END OF FILE */ - swrap_dump_packet(si, NULL, SWRAP_PENDING_RST, NULL, 0); - } - break; - } - - return ret; -} - -_PUBLIC_ ssize_t swrap_recv(int s, void *buf, size_t len, int flags) -{ - int ret; - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_recv(s, buf, len, flags); - } - - len = MIN(len, 1500); - - ret = real_recv(s, buf, len, flags); - if (ret == -1 && errno != EAGAIN && errno != ENOBUFS) { - swrap_dump_packet(si, NULL, SWRAP_RECV_RST, NULL, 0); - } else if (ret == 0) { /* END OF FILE */ - swrap_dump_packet(si, NULL, SWRAP_RECV_RST, NULL, 0); - } else { - swrap_dump_packet(si, NULL, SWRAP_RECV, buf, ret); - } - - return ret; -} - - -_PUBLIC_ ssize_t swrap_send(int s, const void *buf, size_t len, int flags) -{ - int ret; - struct socket_info *si = find_socket_info(s); - - if (!si) { - return real_send(s, buf, len, flags); - } - - len = MIN(len, 1500); - - ret = real_send(s, buf, len, flags); - - if (ret == -1) { - swrap_dump_packet(si, NULL, SWRAP_SEND, buf, len); - swrap_dump_packet(si, NULL, SWRAP_SEND_RST, NULL, 0); - } else { - swrap_dump_packet(si, NULL, SWRAP_SEND, buf, ret); - } - - return ret; -} - -_PUBLIC_ int swrap_close(int fd) -{ - struct socket_info *si = find_socket_info(fd); - int ret; - - if (!si) { - return real_close(fd); - } - - SWRAP_DLIST_REMOVE(sockets, si); - - if (si->myname && si->peername) { - swrap_dump_packet(si, NULL, SWRAP_CLOSE_SEND, NULL, 0); - } - - ret = real_close(fd); - - if (si->myname && si->peername) { - swrap_dump_packet(si, NULL, SWRAP_CLOSE_RECV, NULL, 0); - swrap_dump_packet(si, NULL, SWRAP_CLOSE_ACK, NULL, 0); - } - - if (si->path) free(si->path); - if (si->myname) free(si->myname); - if (si->peername) free(si->peername); - if (si->tmp_path) { - unlink(si->tmp_path); - free(si->tmp_path); - } - free(si); - - return ret; -} diff --git a/source4/lib/socket_wrapper/socket_wrapper.h b/source4/lib/socket_wrapper/socket_wrapper.h deleted file mode 100644 index cc8b937608..0000000000 --- a/source4/lib/socket_wrapper/socket_wrapper.h +++ /dev/null @@ -1,136 +0,0 @@ -/* - * Copyright (C) Jelmer Vernooij 2005 - * Copyright (C) Stefan Metzmacher 2006 - * - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * 3. Neither the name of the author nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - */ - -#ifndef __SOCKET_WRAPPER_H__ -#define __SOCKET_WRAPPER_H__ - -const char *socket_wrapper_dir(void); -unsigned int socket_wrapper_default_iface(void); -int swrap_socket(int family, int type, int protocol); -int swrap_accept(int s, struct sockaddr *addr, socklen_t *addrlen); -int swrap_connect(int s, const struct sockaddr *serv_addr, socklen_t addrlen); -int swrap_bind(int s, const struct sockaddr *myaddr, socklen_t addrlen); -int swrap_listen(int s, int backlog); -int swrap_getpeername(int s, struct sockaddr *name, socklen_t *addrlen); -int swrap_getsockname(int s, struct sockaddr *name, socklen_t *addrlen); -int swrap_getsockopt(int s, int level, int optname, void *optval, socklen_t *optlen); -int swrap_setsockopt(int s, int level, int optname, const void *optval, socklen_t optlen); -ssize_t swrap_recvfrom(int s, void *buf, size_t len, int flags, struct sockaddr *from, socklen_t *fromlen); -ssize_t swrap_sendto(int s, const void *buf, size_t len, int flags, const struct sockaddr *to, socklen_t tolen); -int swrap_ioctl(int s, int req, void *ptr); -ssize_t swrap_recv(int s, void *buf, size_t len, int flags); -ssize_t swrap_send(int s, const void *buf, size_t len, int flags); -int swrap_close(int); - -#ifdef SOCKET_WRAPPER_REPLACE - -#ifdef accept -#undef accept -#endif -#define accept(s,addr,addrlen) swrap_accept(s,addr,addrlen) - -#ifdef connect -#undef connect -#endif -#define connect(s,serv_addr,addrlen) swrap_connect(s,serv_addr,addrlen) - -#ifdef bind -#undef bind -#endif -#define bind(s,myaddr,addrlen) swrap_bind(s,myaddr,addrlen) - -#ifdef listen -#undef listen -#endif -#define listen(s,blog) swrap_listen(s,blog) - -#ifdef getpeername -#undef getpeername -#endif -#define getpeername(s,name,addrlen) swrap_getpeername(s,name,addrlen) - -#ifdef getsockname -#undef getsockname -#endif -#define getsockname(s,name,addrlen) swrap_getsockname(s,name,addrlen) - -#ifdef getsockopt -#undef getsockopt -#endif -#define getsockopt(s,level,optname,optval,optlen) swrap_getsockopt(s,level,optname,optval,optlen) - -#ifdef setsockopt -#undef setsockopt -#endif -#define setsockopt(s,level,optname,optval,optlen) swrap_setsockopt(s,level,optname,optval,optlen) - -#ifdef recvfrom -#undef recvfrom -#endif -#define recvfrom(s,buf,len,flags,from,fromlen) swrap_recvfrom(s,buf,len,flags,from,fromlen) - -#ifdef sendto -#undef sendto -#endif -#define sendto(s,buf,len,flags,to,tolen) swrap_sendto(s,buf,len,flags,to,tolen) - -#ifdef ioctl -#undef ioctl -#endif -#define ioctl(s,req,ptr) swrap_ioctl(s,req,ptr) - -#ifdef recv -#undef recv -#endif -#define recv(s,buf,len,flags) swrap_recv(s,buf,len,flags) - -#ifdef send -#undef send -#endif -#define send(s,buf,len,flags) swrap_send(s,buf,len,flags) - -#ifdef socket -#undef socket -#endif -#define socket(domain,type,protocol) swrap_socket(domain,type,protocol) - -#ifdef close -#undef close -#endif -#define close(s) swrap_close(s) -#endif - - -#endif /* __SOCKET_WRAPPER_H__ */ diff --git a/source4/lib/socket_wrapper/testsuite.c b/source4/lib/socket_wrapper/testsuite.c deleted file mode 100644 index 8877418e4c..0000000000 --- a/source4/lib/socket_wrapper/testsuite.c +++ /dev/null @@ -1,105 +0,0 @@ -/* - Unix SMB/CIFS implementation. - - local testing of the socket wrapper - - Copyright (C) Jelmer Vernooij 2007 - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see . -*/ - -#include "includes.h" -#include "system/network.h" -#include "lib/socket_wrapper/socket_wrapper.h" -#include "torture/torture.h" - -static char *old_dir = NULL; -static char *old_iface = NULL; - -static void backup_env(void) -{ - old_dir = getenv("SOCKET_WRAPPER_DIR"); - old_iface = getenv("SOCKET_WRAPPER_DEFAULT_IFACE"); -} - -static void restore_env(void) -{ - if (old_dir == NULL) - unsetenv("SOCKET_WRAPPER_DIR"); - else - setenv("SOCKET_WRAPPER_DIR", old_dir, 1); - if (old_iface == NULL) - unsetenv("SOCKET_WRAPPER_DEFAULT_IFACE"); - else - setenv("SOCKET_WRAPPER_DEFAULT_IFACE", old_iface, 1); -} - -static bool test_socket_wrapper_dir(struct torture_context *tctx) -{ - backup_env(); - - setenv("SOCKET_WRAPPER_DIR", "foo", 1); - torture_assert_str_equal(tctx, socket_wrapper_dir(), "foo", "setting failed"); - setenv("SOCKET_WRAPPER_DIR", "./foo", 1); - torture_assert_str_equal(tctx, socket_wrapper_dir(), "foo", "setting failed"); - unsetenv("SOCKET_WRAPPER_DIR"); - torture_assert_str_equal(tctx, socket_wrapper_dir(), NULL, "resetting failed"); - - restore_env(); - - return true; -} - -static bool test_swrap_socket(struct torture_context *tctx) -{ - backup_env(); - setenv("SOCKET_WRAPPER_DIR", "foo", 1); - - torture_assert_int_equal(tctx, swrap_socket(1337, 1337, 0), -1, "unknown address family fails"); - torture_assert_int_equal(tctx, errno, EAFNOSUPPORT, "correct errno set"); - torture_assert_int_equal(tctx, swrap_socket(AF_INET, 1337, 0), -1, "unknown type fails"); - torture_assert_int_equal(tctx, errno, EPROTONOSUPPORT, "correct errno set"); - torture_assert_int_equal(tctx, swrap_socket(AF_INET, SOCK_DGRAM, 10), -1, "unknown protocol fails"); - torture_assert_int_equal(tctx, errno, EPROTONOSUPPORT, "correct errno set"); - - restore_env(); - - return true; -} - -unsigned int socket_wrapper_default_iface(void); -static bool test_socket_wrapper_default_iface(struct torture_context *tctx) -{ - backup_env(); - unsetenv("SOCKET_WRAPPER_DEFAULT_IFACE"); - torture_assert_int_equal(tctx, socket_wrapper_default_iface(), 1, "unset"); - setenv("SOCKET_WRAPPER_DEFAULT_IFACE", "2", 1); - torture_assert_int_equal(tctx, socket_wrapper_default_iface(), 2, "unset"); - setenv("SOCKET_WRAPPER_DEFAULT_IFACE", "bla", 1); - torture_assert_int_equal(tctx, socket_wrapper_default_iface(), 1, "unset"); - restore_env(); - return true; -} - -struct torture_suite *torture_local_socket_wrapper(TALLOC_CTX *mem_ctx) -{ - struct torture_suite *suite = torture_suite_create(mem_ctx, - "SOCKET-WRAPPER"); - - torture_suite_add_simple_test(suite, "socket_wrapper_dir", test_socket_wrapper_dir); - torture_suite_add_simple_test(suite, "socket", test_swrap_socket); - torture_suite_add_simple_test(suite, "socket_wrapper_default_iface", test_socket_wrapper_default_iface); - - return suite; -} diff --git a/source4/main.mk b/source4/main.mk index 1fbffbd06e..52170821e8 100644 --- a/source4/main.mk +++ b/source4/main.mk @@ -16,7 +16,7 @@ mkinclude lib/registry/config.mk mkinclude lib/messaging/config.mk mkinclude lib/events/config.mk mkinclude lib/cmdline/config.mk -mkinclude lib/socket_wrapper/config.mk +mkinclude ../socket_wrapper/config.mk mkinclude lib/nss_wrapper/config.mk mkinclude lib/appweb/config.mk mkinclude lib/stream/config.mk diff --git a/source4/torture/local/config.mk b/source4/torture/local/config.mk index cd1c7b1422..fd3f6a61d5 100644 --- a/source4/torture/local/config.mk +++ b/source4/torture/local/config.mk @@ -30,7 +30,7 @@ TORTURE_LOCAL_OBJ_FILES = \ $(torturesrcdir)/../librpc/tests/binding_string.o \ $(torturesrcdir)/../lib/util/tests/idtree.o \ $(torturesrcdir)/../lib/socket/testsuite.o \ - $(torturesrcdir)/../lib/socket_wrapper/testsuite.o \ + $(torturesrcdir)/../../socket_wrapper/testsuite.o \ $(torturesrcdir)/../libcli/resolve/testsuite.o \ $(torturesrcdir)/../lib/util/tests/strlist.o \ $(torturesrcdir)/../lib/util/tests/str.o \ -- cgit