diff options
Diffstat (limited to 'source4/lib/socket_wrapper/socket_wrapper.c')
| -rw-r--r-- | source4/lib/socket_wrapper/socket_wrapper.c | 1841 |
1 files changed, 0 insertions, 1841 deletions
diff --git a/source4/lib/socket_wrapper/socket_wrapper.c b/source4/lib/socket_wrapper/socket_wrapper.c deleted file mode 100644 index e8d27adc37..0000000000 --- a/source4/lib/socket_wrapper/socket_wrapper.c +++ /dev/null @@ -1,1841 +0,0 @@ -/* - * Copyright (C) Jelmer Vernooij 2005,2008 <jelmer@samba.org> - * Copyright (C) Stefan Metzmacher 2006 <metze@samba.org> - * - * 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 "../replace/replace.h" -#include "system/network.h" -#include "system/filesys.h" -#include "system/time.h" - -#else /* _SAMBA_BUILD_ */ - -#include <sys/types.h> -#include <sys/time.h> -#include <sys/stat.h> -#include <sys/socket.h> -#include <sys/ioctl.h> -#include <sys/filio.h> -#include <errno.h> -#include <sys/un.h> -#include <netinet/in.h> -#include <netinet/tcp.h> -#include <fcntl.h> -#include <stdlib.h> -#include <unistd.h> -#include <string.h> -#include <stdio.h> -#include <stdint.h> - -#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; -} |