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-rw-r--r--lib/socket_wrapper/config.m422
-rw-r--r--lib/socket_wrapper/config.mk8
-rw-r--r--lib/socket_wrapper/socket_wrapper.c1841
-rw-r--r--lib/socket_wrapper/socket_wrapper.h136
-rw-r--r--lib/socket_wrapper/testsuite.c105
5 files changed, 2112 insertions, 0 deletions
diff --git a/lib/socket_wrapper/config.m4 b/lib/socket_wrapper/config.m4
new file mode 100644
index 0000000000..68e392b3e7
--- /dev/null
+++ b/lib/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="../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/lib/socket_wrapper/config.mk b/lib/socket_wrapper/config.mk
new file mode 100644
index 0000000000..60cfb3209a
--- /dev/null
+++ b/lib/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/lib/socket_wrapper/socket_wrapper.c b/lib/socket_wrapper/socket_wrapper.c
new file mode 100644
index 0000000000..e8d27adc37
--- /dev/null
+++ b/lib/socket_wrapper/socket_wrapper.c
@@ -0,0 +1,1841 @@
+/*
+ * 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;
+}
diff --git a/lib/socket_wrapper/socket_wrapper.h b/lib/socket_wrapper/socket_wrapper.h
new file mode 100644
index 0000000000..cc8b937608
--- /dev/null
+++ b/lib/socket_wrapper/socket_wrapper.h
@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) Jelmer Vernooij 2005 <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.
+ *
+ */
+
+#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/lib/socket_wrapper/testsuite.c b/lib/socket_wrapper/testsuite.c
new file mode 100644
index 0000000000..e6e08e3be6
--- /dev/null
+++ b/lib/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 <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "system/network.h"
+#include "../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;
+}
generated by cgit (git 2.34.1) at 2024-11-23 04:12:52 +0000