/*
* Copyright (C) Jelmer Vernooij 2005,2008 <jelmer@samba.org>
- * Copyright (C) Stefan Metzmacher 2006 <metze@samba.org>
+ * Copyright (C) Stefan Metzmacher 2006-2009 <metze@samba.org>
*
* All rights reserved.
*
#define real_setsockopt setsockopt
#define real_recvfrom recvfrom
#define real_sendto sendto
+#define real_sendmsg sendmsg
#define real_ioctl ioctl
#define real_recv recv
+#define real_read read
#define real_send send
+#define real_readv readv
+#define real_writev writev
#define real_socket socket
#define real_close close
+#define real_dup dup
+#define real_dup2 dup2
#endif
#ifdef HAVE_GETTIMEOFDAY_TZ
#define SOCKET_TYPE_CHAR_TCP_V6 'X'
#define SOCKET_TYPE_CHAR_UDP_V6 'Y'
-#define MAX_WRAPPED_INTERFACES 16
+/* This limit is to avoid broadcast sendto() needing to stat too many
+ * files. It may be raised (with a performance cost) to up to 254
+ * without changing the format above */
+#define MAX_WRAPPED_INTERFACES 32
-#define SW_IPV6_ADDRESS 1
+#ifdef HAVE_IPV6
+/*
+ * FD00::5357:5FXX
+ */
+static const struct in6_addr *swrap_ipv6(void)
+{
+ static struct in6_addr v;
+ static int initialized;
+ int ret;
+
+ if (initialized) {
+ return &v;
+ }
+ initialized = 1;
+
+ ret = inet_pton(AF_INET6, "FD00::5357:5F00", &v);
+ if (ret <= 0) {
+ abort();
+ }
+
+ return &v;
+}
+#endif
static struct sockaddr *sockaddr_dup(const void *data, socklen_t len)
{
return 0;
}
-
+struct socket_info_fd {
+ struct socket_info_fd *prev, *next;
+ int fd;
+};
struct socket_info
{
- int fd;
+ struct socket_info_fd *fds;
int family;
int type;
int bound;
int bcast;
int is_server;
+ int connected;
+ int defer_connect;
- char *path;
char *tmp_path;
struct sockaddr *myname;
switch(type) {
case SOCKET_TYPE_CHAR_TCP:
case SOCKET_TYPE_CHAR_UDP: {
- struct sockaddr_in *in2 = (struct sockaddr_in *)in;
-
+ struct sockaddr_in *in2 = (struct sockaddr_in *)(void *)in;
+
if ((*len) < sizeof(*in2)) {
errno = EINVAL;
return -1;
#ifdef HAVE_IPV6
case SOCKET_TYPE_CHAR_TCP_V6:
case SOCKET_TYPE_CHAR_UDP_V6: {
- struct sockaddr_in6 *in2 = (struct sockaddr_in6 *)in;
-
+ struct sockaddr_in6 *in2 = (struct sockaddr_in6 *)(void *)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_addr = *swrap_ipv6();
+ in2->sin6_addr.s6_addr[15] = iface;
in2->sin6_port = htons(prt);
*len = sizeof(*in2);
if (bcast) *bcast = 0;
- switch (si->family) {
+ switch (inaddr->sa_family) {
case AF_INET: {
const struct sockaddr_in *in =
- (const struct sockaddr_in *)inaddr;
+ (const struct sockaddr_in *)(const void *)inaddr;
unsigned int addr = ntohl(in->sin_addr.s_addr);
char u_type = '\0';
char b_type = '\0';
#ifdef HAVE_IPV6
case AF_INET6: {
const struct sockaddr_in6 *in =
- (const struct sockaddr_in6 *)inaddr;
+ (const struct sockaddr_in6 *)(const void *)inaddr;
+ struct in6_addr cmp1, cmp2;
switch (si->type) {
case SOCK_STREAM:
/* XXX no multicast/broadcast */
prt = ntohs(in->sin6_port);
- iface = SW_IPV6_ADDRESS;
-
+
+ cmp1 = *swrap_ipv6();
+ cmp2 = in->sin6_addr;
+ cmp2.s6_addr[15] = 0;
+ if (IN6_ARE_ADDR_EQUAL(&cmp1, &cmp2)) {
+ iface = in->sin6_addr.s6_addr[15];
+ } else {
+ errno = ENETUNREACH;
+ return -1;
+ }
+
break;
}
#endif
switch (si->family) {
case AF_INET: {
const struct sockaddr_in *in =
- (const struct sockaddr_in *)inaddr;
+ (const struct sockaddr_in *)(const void *)inaddr;
unsigned int addr = ntohl(in->sin_addr.s_addr);
char u_type = '\0';
char d_type = '\0';
#ifdef HAVE_IPV6
case AF_INET6: {
const struct sockaddr_in6 *in =
- (const struct sockaddr_in6 *)inaddr;
+ (const struct sockaddr_in6 *)(const void *)inaddr;
+ struct in6_addr cmp1, cmp2;
switch (si->type) {
case SOCK_STREAM:
/* XXX no multicast/broadcast */
prt = ntohs(in->sin6_port);
- iface = SW_IPV6_ADDRESS;
-
+
+ cmp1 = *swrap_ipv6();
+ cmp2 = in->sin6_addr;
+ cmp2.s6_addr[15] = 0;
+ if (IN6_IS_ADDR_UNSPECIFIED(&in->sin6_addr)) {
+ iface = socket_wrapper_default_iface();
+ } else if (IN6_ARE_ADDR_EQUAL(&cmp1, &cmp2)) {
+ iface = in->sin6_addr.s6_addr[15];
+ } else {
+ errno = EADDRNOTAVAIL;
+ return -1;
+ }
+
break;
}
#endif
default:
- errno = ENETUNREACH;
+ errno = EADDRNOTAVAIL;
return -1;
}
if (bcast) *bcast = is_bcast;
+ if (iface == 0 || iface > MAX_WRAPPED_INTERFACES) {
+ errno = EINVAL;
+ return -1;
+ }
+
if (prt == 0) {
/* handle auto-allocation of ephemeral ports */
for (prt = 5001; prt < 10000; prt++) {
{
struct socket_info *i;
for (i = sockets; i; i = i->next) {
- if (i->fd == fd)
- return i;
+ struct socket_info_fd *f;
+ for (f = i->fds; f; f = f->next) {
+ if (f->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)
{
+ struct sockaddr *out = (struct sockaddr *)(void *)out_addr;
if (!out_addr)
return 0;
- out_addr->sun_family = AF_UNIX;
+ out->sa_family = AF_UNIX;
+#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
+ out->sa_len = sizeof(*out_addr);
+#endif
switch (in_addr->sa_family) {
case AF_INET:
default:
break;
}
-
+
errno = EAFNOSUPPORT;
return -1;
}
struct sockaddr *out_addr,
socklen_t *out_addrlen)
{
+ int ret;
+
if (out_addr == NULL || out_addrlen == NULL)
return 0;
errno = ESOCKTNOSUPPORT;
return -1;
}
- return convert_un_in(in_addr, out_addr, out_addrlen);
+ ret = convert_un_in(in_addr, out_addr, out_addrlen);
+#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
+ out_addr->sa_len = *out_addrlen;
+#endif
+ return ret;
default:
break;
}
SWRAP_SEND_RST,
SWRAP_CLOSE_SEND,
SWRAP_CLOSE_RECV,
- SWRAP_CLOSE_ACK
+ SWRAP_CLOSE_ACK,
};
struct swrap_file_hdr {
};
#define SWRAP_FILE_HDR_SIZE 24
-struct swrap_packet {
+struct swrap_packet_frame {
+ uint32_t seconds;
+ uint32_t micro_seconds;
+ uint32_t recorded_length;
+ uint32_t full_length;
+};
+#define SWRAP_PACKET_FRAME_SIZE 16
+
+union swrap_packet_ip {
+ 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;
+ } v4;
+#define SWRAP_PACKET_IP_V4_SIZE 20
struct {
- uint32_t seconds;
- uint32_t micro_seconds;
- uint32_t recorded_length;
- uint32_t full_length;
- } frame;
-#define SWRAP_PACKET__FRAME_SIZE 16
+ uint8_t ver_prio;
+ uint8_t flow_label_high;
+ uint16_t flow_label_low;
+ uint16_t payload_length;
+ uint8_t next_header;
+ uint8_t hop_limit;
+ uint8_t src_addr[16];
+ uint8_t dest_addr[16];
+ } v6;
+#define SWRAP_PACKET_IP_V6_SIZE 40
+};
+#define SWRAP_PACKET_IP_SIZE 40
+union swrap_packet_payload {
+ 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_PAYLOAD_TCP_SIZE 20
+ struct {
+ uint16_t source_port;
+ uint16_t dest_port;
+ uint16_t length;
+ uint16_t checksum;
+ } udp;
+#define SWRAP_PACKET_PAYLOAD_UDP_SIZE 8
+ struct {
+ uint8_t type;
+ uint8_t code;
+ uint16_t checksum;
+ uint32_t unused;
+ } icmp4;
+#define SWRAP_PACKET_PAYLOAD_ICMP4_SIZE 8
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;
+ uint8_t type;
+ uint8_t code;
+ uint16_t checksum;
+ uint32_t unused;
+ } icmp6;
+#define SWRAP_PACKET_PAYLOAD_ICMP6_SIZE 8
};
-#define SWRAP_PACKET_SIZE 56
+#define SWRAP_PACKET_PAYLOAD_SIZE 20
+
+#define SWRAP_PACKET_MIN_ALLOC \
+ (SWRAP_PACKET_FRAME_SIZE + \
+ SWRAP_PACKET_IP_SIZE + \
+ SWRAP_PACKET_PAYLOAD_SIZE)
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, } } } };
+ static const struct swrap_file_hdr h;
+ static const struct swrap_packet_frame f;
+ static const union swrap_packet_ip i;
+ static const union swrap_packet_payload p;
if (initialized == 1) {
return s;
if (sizeof(h) != SWRAP_FILE_HDR_SIZE) {
return NULL;
}
- if (sizeof(p) != SWRAP_PACKET_SIZE) {
+ if (sizeof(f) != SWRAP_PACKET_FRAME_SIZE) {
+ return NULL;
+ }
+ if (sizeof(i) != SWRAP_PACKET_IP_SIZE) {
return NULL;
}
- if (sizeof(p.frame) != SWRAP_PACKET__FRAME_SIZE) {
+ if (sizeof(i.v4) != SWRAP_PACKET_IP_V4_SIZE) {
return NULL;
}
- if (sizeof(p.ip.hdr) != SWRAP_PACKET__IP_HDR_SIZE) {
+ if (sizeof(i.v6) != SWRAP_PACKET_IP_V6_SIZE) {
return NULL;
}
- if (sizeof(p.ip.p.tcp) != SWRAP_PACKET__IP_P_TCP_SIZE) {
+ if (sizeof(p) != SWRAP_PACKET_PAYLOAD_SIZE) {
return NULL;
}
- if (sizeof(p.ip.p.udp) != SWRAP_PACKET__IP_P_UDP_SIZE) {
+ if (sizeof(p.tcp) != SWRAP_PACKET_PAYLOAD_TCP_SIZE) {
return NULL;
}
- if (sizeof(p.ip.p.icmp) != SWRAP_PACKET__IP_P_ICMP_SIZE) {
+ if (sizeof(p.udp) != SWRAP_PACKET_PAYLOAD_UDP_SIZE) {
+ return NULL;
+ }
+ if (sizeof(p.icmp4) != SWRAP_PACKET_PAYLOAD_ICMP4_SIZE) {
+ return NULL;
+ }
+ if (sizeof(p.icmp6) != SWRAP_PACKET_PAYLOAD_ICMP6_SIZE) {
return NULL;
}
return s;
}
-static struct swrap_packet *swrap_packet_init(struct timeval *tval,
- const struct sockaddr_in *src_addr,
- const struct sockaddr_in *dest_addr,
- int socket_type,
- const unsigned char *payload,
- size_t payload_len,
- unsigned long tcp_seqno,
- unsigned long tcp_ack,
- unsigned char tcp_ctl,
- int unreachable,
- size_t *_packet_len)
+static uint8_t *swrap_packet_init(struct timeval *tval,
+ const struct sockaddr *src,
+ const struct sockaddr *dest,
+ int socket_type,
+ const uint8_t *payload,
+ size_t payload_len,
+ unsigned long tcp_seqno,
+ unsigned long tcp_ack,
+ unsigned char tcp_ctl,
+ int unreachable,
+ size_t *_packet_len)
{
- struct swrap_packet *ret;
- struct swrap_packet *packet;
+ uint8_t *base;
+ uint8_t *buf;
+ struct swrap_packet_frame *frame;
+ union swrap_packet_ip *ip;
+ union swrap_packet_payload *pay;
size_t packet_len;
size_t alloc_len;
- size_t nonwire_len = sizeof(packet->frame);
+ size_t nonwire_len = sizeof(*frame);
size_t wire_hdr_len = 0;
size_t wire_len = 0;
+ size_t ip_hdr_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;
+ uint8_t protocol = 0, icmp_protocol = 0;
+ const struct sockaddr_in *src_in = NULL;
+ const struct sockaddr_in *dest_in = NULL;
+#ifdef HAVE_IPV6
+ const struct sockaddr_in6 *src_in6 = NULL;
+ const struct sockaddr_in6 *dest_in6 = NULL;
+#endif
+ uint16_t src_port;
+ uint16_t dest_port;
+
+ switch (src->sa_family) {
+ case AF_INET:
+ src_in = (const struct sockaddr_in *)src;
+ dest_in = (const struct sockaddr_in *)dest;
+ src_port = src_in->sin_port;
+ dest_port = dest_in->sin_port;
+ ip_hdr_len = sizeof(ip->v4);
+ break;
+#ifdef HAVE_IPV6
+ case AF_INET6:
+ src_in6 = (const struct sockaddr_in6 *)src;
+ dest_in6 = (const struct sockaddr_in6 *)dest;
+ src_port = src_in6->sin6_port;
+ dest_port = dest_in6->sin6_port;
+ ip_hdr_len = sizeof(ip->v6);
+ break;
+#endif
+ default:
+ return NULL;
+ }
switch (socket_type) {
case SOCK_STREAM:
protocol = 0x06; /* TCP */
- wire_hdr_len = sizeof(packet->ip.hdr) + sizeof(packet->ip.p.tcp);
+ wire_hdr_len = ip_hdr_len + sizeof(pay->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_hdr_len = ip_hdr_len + sizeof(pay->udp);
wire_len = wire_hdr_len + payload_len;
break;
if (unreachable) {
icmp_protocol = protocol;
- protocol = 0x01; /* ICMP */
+ switch (src->sa_family) {
+ case AF_INET:
+ protocol = 0x01; /* ICMPv4 */
+ icmp_hdr_len = ip_hdr_len + sizeof(pay->icmp4);
+ break;
+#ifdef HAVE_IPV6
+ case AF_INET6:
+ protocol = 0x3A; /* ICMPv6 */
+ icmp_hdr_len = ip_hdr_len + sizeof(pay->icmp6);
+ break;
+#endif
+ }
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 (alloc_len < SWRAP_PACKET_MIN_ALLOC) {
+ alloc_len = SWRAP_PACKET_MIN_ALLOC;
+ }
+
+ base = (uint8_t *)malloc(alloc_len);
+ if (!base) return NULL;
+
+ buf = base;
+
+ frame = (struct swrap_packet_frame *)buf;
+ frame->seconds = tval->tv_sec;
+ frame->micro_seconds = tval->tv_usec;
+ frame->recorded_length = wire_len - icmp_truncate_len;
+ frame->full_length = wire_len - icmp_truncate_len;
+ buf += SWRAP_PACKET_FRAME_SIZE;
+
+ ip = (union swrap_packet_ip *)buf;
+ switch (src->sa_family) {
+ case AF_INET:
+ ip->v4.ver_hdrlen = 0x45; /* version 4 and 5 * 32 bit words */
+ ip->v4.tos = 0x00;
+ ip->v4.packet_length = htons(wire_len - icmp_truncate_len);
+ ip->v4.identification = htons(0xFFFF);
+ ip->v4.flags = 0x40; /* BIT 1 set - means don't fraqment */
+ ip->v4.fragment = htons(0x0000);
+ ip->v4.ttl = 0xFF;
+ ip->v4.protocol = protocol;
+ ip->v4.hdr_checksum = htons(0x0000);
+ ip->v4.src_addr = src_in->sin_addr.s_addr;
+ ip->v4.dest_addr = dest_in->sin_addr.s_addr;
+ buf += SWRAP_PACKET_IP_V4_SIZE;
+ break;
+#ifdef HAVE_IPV6
+ case AF_INET6:
+ ip->v6.ver_prio = 0x60; /* version 4 and 5 * 32 bit words */
+ ip->v6.flow_label_high = 0x00;
+ ip->v6.flow_label_low = 0x0000;
+ ip->v6.payload_length = htons(wire_len - icmp_truncate_len); /* TODO */
+ ip->v6.next_header = protocol;
+ memcpy(ip->v6.src_addr, src_in6->sin6_addr.s6_addr, 16);
+ memcpy(ip->v6.dest_addr, dest_in6->sin6_addr.s6_addr, 16);
+ buf += SWRAP_PACKET_IP_V6_SIZE;
+ break;
+#endif
+ }
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;
+ pay = (union swrap_packet_payload *)buf;
+ switch (src->sa_family) {
+ case AF_INET:
+ pay->icmp4.type = 0x03; /* destination unreachable */
+ pay->icmp4.code = 0x01; /* host unreachable */
+ pay->icmp4.checksum = htons(0x0000);
+ pay->icmp4.unused = htonl(0x00000000);
+ buf += SWRAP_PACKET_PAYLOAD_ICMP4_SIZE;
+
+ /* set the ip header in the ICMP payload */
+ ip = (union swrap_packet_ip *)buf;
+ ip->v4.ver_hdrlen = 0x45; /* version 4 and 5 * 32 bit words */
+ ip->v4.tos = 0x00;
+ ip->v4.packet_length = htons(wire_len - icmp_hdr_len);
+ ip->v4.identification = htons(0xFFFF);
+ ip->v4.flags = 0x40; /* BIT 1 set - means don't fraqment */
+ ip->v4.fragment = htons(0x0000);
+ ip->v4.ttl = 0xFF;
+ ip->v4.protocol = icmp_protocol;
+ ip->v4.hdr_checksum = htons(0x0000);
+ ip->v4.src_addr = dest_in->sin_addr.s_addr;
+ ip->v4.dest_addr = src_in->sin_addr.s_addr;
+ buf += SWRAP_PACKET_IP_V4_SIZE;
+
+ src_port = dest_in->sin_port;
+ dest_port = src_in->sin_port;
+ break;
+#ifdef HAVE_IPV6
+ case AF_INET6:
+ pay->icmp6.type = 0x01; /* destination unreachable */
+ pay->icmp6.code = 0x03; /* address unreachable */
+ pay->icmp6.checksum = htons(0x0000);
+ pay->icmp6.unused = htonl(0x00000000);
+ buf += SWRAP_PACKET_PAYLOAD_ICMP6_SIZE;
+
+ /* set the ip header in the ICMP payload */
+ ip = (union swrap_packet_ip *)buf;
+ ip->v6.ver_prio = 0x60; /* version 4 and 5 * 32 bit words */
+ ip->v6.flow_label_high = 0x00;
+ ip->v6.flow_label_low = 0x0000;
+ ip->v6.payload_length = htons(wire_len - icmp_truncate_len); /* TODO */
+ ip->v6.next_header = protocol;
+ memcpy(ip->v6.src_addr, dest_in6->sin6_addr.s6_addr, 16);
+ memcpy(ip->v6.dest_addr, src_in6->sin6_addr.s6_addr, 16);
+ buf += SWRAP_PACKET_IP_V6_SIZE;
+
+ src_port = dest_in6->sin6_port;
+ dest_port = src_in6->sin6_port;
+ break;
+#endif
+ }
}
+ pay = (union swrap_packet_payload *)buf;
+
switch (socket_type) {
case SOCK_STREAM:
- packet->ip.p.tcp.source_port = src_port;
- packet->ip.p.tcp.dest_port = dest_port;
- packet->ip.p.tcp.seq_num = htonl(tcp_seqno);
- packet->ip.p.tcp.ack_num = htonl(tcp_ack);
- packet->ip.p.tcp.hdr_length = 0x50; /* 5 * 32 bit words */
- packet->ip.p.tcp.control = tcp_ctl;
- packet->ip.p.tcp.window = htons(0x7FFF);
- packet->ip.p.tcp.checksum = htons(0x0000);
- packet->ip.p.tcp.urg = htons(0x0000);
+ pay->tcp.source_port = src_port;
+ pay->tcp.dest_port = dest_port;
+ pay->tcp.seq_num = htonl(tcp_seqno);
+ pay->tcp.ack_num = htonl(tcp_ack);
+ pay->tcp.hdr_length = 0x50; /* 5 * 32 bit words */
+ pay->tcp.control = tcp_ctl;
+ pay->tcp.window = htons(0x7FFF);
+ pay->tcp.checksum = htons(0x0000);
+ pay->tcp.urg = htons(0x0000);
+ buf += SWRAP_PACKET_PAYLOAD_TCP_SIZE;
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);
+ pay->udp.source_port = src_port;
+ pay->udp.dest_port = dest_port;
+ pay->udp.length = htons(8 + payload_len);
+ pay->udp.checksum = htons(0x0000);
+ buf += SWRAP_PACKET_PAYLOAD_UDP_SIZE;
break;
}
if (payload && payload_len > 0) {
- unsigned char *p = (unsigned char *)ret;
- p += nonwire_len;
- p += wire_hdr_len;
- memcpy(p, payload, payload_len);
+ memcpy(buf, payload, payload_len);
}
*_packet_len = packet_len - icmp_truncate_len;
- return ret;
+ return base;
}
static int swrap_get_pcap_fd(const char *fname)
file_hdr.frame_max_len = SWRAP_FRAME_LENGTH_MAX;
file_hdr.link_type = 0x0065; /* 101 RAW IP */
- write(fd, &file_hdr, sizeof(file_hdr));
+ if (write(fd, &file_hdr, sizeof(file_hdr)) != sizeof(file_hdr)) {
+ close(fd);
+ fd = -1;
+ }
return fd;
}
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)
+static uint8_t *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;
+ const struct sockaddr *src_addr;
+ const struct sockaddr *dest_addr;
unsigned long tcp_seqno = 0;
unsigned long tcp_ack = 0;
unsigned char tcp_ctl = 0;
switch (si->family) {
case AF_INET:
break;
+#ifdef HAVE_IPV6
+ case AF_INET6:
+ break;
+#endif
default:
return NULL;
}
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;
+ src_addr = si->myname;
+ dest_addr = addr;
tcp_seqno = si->io.pck_snd;
tcp_ack = si->io.pck_rcv;
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;
+ dest_addr = si->myname;
+ src_addr = addr;
tcp_seqno = si->io.pck_rcv;
tcp_ack = si->io.pck_snd;
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;
+ dest_addr = si->myname;
+ src_addr = addr;
/* Unreachable: resend the data of SWRAP_CONNECT_SEND */
tcp_seqno = si->io.pck_snd - 1;
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;
+ src_addr = si->myname;
+ dest_addr = addr;
tcp_seqno = si->io.pck_snd;
tcp_ack = si->io.pck_rcv;
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;
+ dest_addr = si->myname;
+ src_addr = addr;
tcp_seqno = si->io.pck_rcv;
tcp_ack = si->io.pck_snd;
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;
+ src_addr = si->myname;
+ dest_addr = addr;
tcp_seqno = si->io.pck_snd;
tcp_ack = si->io.pck_rcv;
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;
+ dest_addr = si->myname;
+ src_addr = addr;
tcp_seqno = si->io.pck_rcv;
tcp_ack = si->io.pck_snd;
break;
case SWRAP_SEND:
- src_addr = (const struct sockaddr_in *)si->myname;
- dest_addr = (const struct sockaddr_in *)si->peername;
+ src_addr = si->myname;
+ dest_addr = si->peername;
tcp_seqno = si->io.pck_snd;
tcp_ack = si->io.pck_rcv;
break;
case SWRAP_SEND_RST:
- dest_addr = (const struct sockaddr_in *)si->myname;
- src_addr = (const struct sockaddr_in *)si->peername;
+ dest_addr = si->myname;
+ src_addr = si->peername;
if (si->type == SOCK_DGRAM) {
return swrap_marshall_packet(si, si->peername,
break;
case SWRAP_PENDING_RST:
- dest_addr = (const struct sockaddr_in *)si->myname;
- src_addr = (const struct sockaddr_in *)si->peername;
+ dest_addr = si->myname;
+ src_addr = si->peername;
if (si->type == SOCK_DGRAM) {
return NULL;
break;
case SWRAP_RECV:
- dest_addr = (const struct sockaddr_in *)si->myname;
- src_addr = (const struct sockaddr_in *)si->peername;
+ dest_addr = si->myname;
+ src_addr = si->peername;
tcp_seqno = si->io.pck_rcv;
tcp_ack = si->io.pck_snd;
break;
case SWRAP_RECV_RST:
- dest_addr = (const struct sockaddr_in *)si->myname;
- src_addr = (const struct sockaddr_in *)si->peername;
+ dest_addr = si->myname;
+ src_addr = si->peername;
if (si->type == SOCK_DGRAM) {
return NULL;
break;
case SWRAP_SENDTO:
- src_addr = (const struct sockaddr_in *)si->myname;
- dest_addr = (const struct sockaddr_in *)addr;
+ src_addr = si->myname;
+ dest_addr = 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;
+ dest_addr = si->myname;
+ src_addr = addr;
unreachable = 1;
break;
case SWRAP_RECVFROM:
- dest_addr = (const struct sockaddr_in *)si->myname;
- src_addr = (const struct sockaddr_in *)addr;
+ dest_addr = si->myname;
+ src_addr = addr;
si->io.pck_rcv += len;
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;
+ src_addr = si->myname;
+ dest_addr = si->peername;
tcp_seqno = si->io.pck_snd;
tcp_ack = si->io.pck_rcv;
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;
+ dest_addr = si->myname;
+ src_addr = si->peername;
tcp_seqno = si->io.pck_rcv;
tcp_ack = si->io.pck_snd;
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;
+ src_addr = si->myname;
+ dest_addr = si->peername;
tcp_seqno = si->io.pck_snd;
tcp_ack = si->io.pck_rcv;
swrapGetTimeOfDay(&tv);
return swrap_packet_init(&tv, src_addr, dest_addr, si->type,
- (const unsigned char *)buf, len,
- tcp_seqno, tcp_ack, tcp_ctl, unreachable,
- packet_len);
+ (const uint8_t *)buf, len,
+ tcp_seqno, tcp_ack, tcp_ctl, unreachable,
+ packet_len);
}
-static void swrap_dump_packet(struct socket_info *si,
- const struct sockaddr *addr,
- enum swrap_packet_type type,
- const void *buf, size_t len)
+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;
+ uint8_t *packet;
size_t packet_len = 0;
int fd;
fd = swrap_get_pcap_fd(file_name);
if (fd != -1) {
- write(fd, packet, packet_len);
+ if (write(fd, packet, packet_len) != packet_len) {
+ free(packet);
+ return;
+ }
}
free(packet);
_PUBLIC_ int swrap_socket(int family, int type, int protocol)
{
struct socket_info *si;
+ struct socket_info_fd *fi;
int fd;
+ int real_type = type;
+#ifdef SOCK_CLOEXEC
+ real_type &= ~SOCK_CLOEXEC;
+#endif
+#ifdef SOCK_NONBLOCK
+ real_type &= ~SOCK_NONBLOCK;
+#endif
if (!socket_wrapper_dir()) {
return real_socket(family, type, protocol);
return -1;
}
- switch (type) {
+ switch (real_type) {
case SOCK_STREAM:
break;
case SOCK_DGRAM:
case 0:
break;
case 6:
- if (type == SOCK_STREAM) {
+ if (real_type == SOCK_STREAM) {
break;
}
/*fall through*/
case 17:
- if (type == SOCK_DGRAM) {
+ if (real_type == SOCK_DGRAM) {
break;
}
/*fall through*/
return -1;
}
+ /* We must call real_socket with type, from the caller, not the version we removed
+ SOCK_CLOEXEC and SOCK_NONBLOCK from */
fd = real_socket(AF_UNIX, type, 0);
if (fd == -1) return -1;
si = (struct socket_info *)calloc(1, sizeof(struct socket_info));
+ if (si == NULL) {
+ errno = ENOMEM;
+ return -1;
+ }
si->family = family;
- si->type = type;
+
+ /* however, the rest of the socket_wrapper code expects just
+ * the type, not the flags */
+ si->type = real_type;
si->protocol = protocol;
- si->fd = fd;
+ fi = (struct socket_info_fd *)calloc(1, sizeof(struct socket_info_fd));
+ if (fi == NULL) {
+ free(si);
+ errno = ENOMEM;
+ return -1;
+ }
+
+ fi->fd = fd;
+
+ SWRAP_DLIST_ADD(si->fds, fi);
SWRAP_DLIST_ADD(sockets, si);
- return si->fd;
+ return fd;
}
_PUBLIC_ int swrap_accept(int s, struct sockaddr *addr, socklen_t *addrlen)
{
struct socket_info *parent_si, *child_si;
+ struct socket_info_fd *child_fi;
int fd;
struct sockaddr_un un_addr;
socklen_t un_addrlen = sizeof(un_addr);
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);
+ ret = real_accept(s, (struct sockaddr *)(void *)&un_addr, &un_addrlen);
if (ret == -1) {
free(my_addr);
return ret;
child_si = (struct socket_info *)malloc(sizeof(struct socket_info));
memset(child_si, 0, sizeof(*child_si));
- child_si->fd = fd;
+ child_fi = (struct socket_info_fd *)calloc(1, sizeof(struct socket_info_fd));
+ if (child_fi == NULL) {
+ free(child_si);
+ free(my_addr);
+ close(fd);
+ errno = ENOMEM;
+ return -1;
+ }
+
+ child_fi->fd = fd;
+
+ SWRAP_DLIST_ADD(child_si->fds, child_fi);
+
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->connected = 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;
+ size_t copy_len = MIN(*addrlen, len);
+ if (copy_len > 0) {
+ memcpy(addr, my_addr, copy_len);
+ }
+ *addrlen = len;
}
- ret = real_getsockname(fd, (struct sockaddr *)&un_my_addr, &un_my_addrlen);
+ ret = real_getsockname(fd, (struct sockaddr *)(void *)&un_my_addr,
+ &un_my_addrlen);
if (ret == -1) {
+ free(child_fi);
free(child_si);
close(fd);
return ret;
ret = sockaddr_convert_from_un(child_si, &un_my_addr, un_my_addrlen,
child_si->family, my_addr, &len);
if (ret == -1) {
+ free(child_fi);
free(child_si);
free(my_addr);
close(fd);
/* 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)
+ assign it here.
+ Note: this might change the family from ipv6 to ipv4
+*/
+static int swrap_auto_bind(int fd, struct socket_info *si, int family)
{
struct sockaddr_un un_addr;
int i;
un_addr.sun_family = AF_UNIX;
- switch (si->family) {
+ switch (family) {
case AF_INET: {
struct sockaddr_in in;
case AF_INET6: {
struct sockaddr_in6 in6;
+ if (si->family != family) {
+ errno = ENETUNREACH;
+ return -1;
+ }
+
switch (si->type) {
case SOCK_STREAM:
type = SOCKET_TYPE_CHAR_TCP_V6;
type = SOCKET_TYPE_CHAR_UDP_V6;
break;
default:
- errno = ESOCKTNOSUPPORT;
- return -1;
+ errno = ESOCKTNOSUPPORT;
+ return -1;
}
memset(&in6, 0, sizeof(in6));
in6.sin6_family = AF_INET6;
- in6.sin6_addr.s6_addr[0] = SW_IPV6_ADDRESS;
+ in6.sin6_addr = *swrap_ipv6();
+ in6.sin6_addr.s6_addr[15] = socket_wrapper_default_iface();
si->myname_len = sizeof(in6);
si->myname = sockaddr_dup(&in6, si->myname_len);
break;
"%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));
+
+ ret = real_bind(fd, (struct sockaddr *)(void *)&un_addr,
+ sizeof(un_addr));
if (ret == -1) return ret;
si->tmp_path = strdup(un_addr.sun_path);
return -1;
}
+ si->family = family;
set_port(si->family, port, si->myname);
return 0;
int ret;
struct sockaddr_un un_addr;
struct socket_info *si = find_socket_info(s);
+ int bcast = 0;
if (!si) {
return real_connect(s, serv_addr, addrlen);
}
if (si->bound == 0) {
- ret = swrap_auto_bind(si);
+ ret = swrap_auto_bind(s, si, serv_addr->sa_family);
if (ret == -1) return -1;
}
return -1;
}
- ret = sockaddr_convert_to_un(si, (const struct sockaddr *)serv_addr, addrlen, &un_addr, 0, NULL);
+ ret = sockaddr_convert_to_un(si, serv_addr,
+ addrlen, &un_addr, 0, &bcast);
if (ret == -1) return -1;
- swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_SEND, NULL, 0);
+ if (bcast) {
+ errno = ENETUNREACH;
+ return -1;
+ }
- ret = real_connect(s, (struct sockaddr *)&un_addr,
- sizeof(struct sockaddr_un));
+ if (si->type == SOCK_DGRAM) {
+ si->defer_connect = 1;
+ ret = 0;
+ } else {
+ swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_SEND, NULL, 0);
+
+ ret = real_connect(s, (struct sockaddr *)(void *)&un_addr,
+ sizeof(struct sockaddr_un));
+ }
/* to give better errors */
if (ret == -1 && errno == ENOENT) {
if (ret == 0) {
si->peername_len = addrlen;
si->peername = sockaddr_dup(serv_addr, addrlen);
+ si->connected = 1;
swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_RECV, NULL, 0);
swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_ACK, NULL, 0);
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);
+ ret = sockaddr_convert_to_un(si, 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,
+ ret = real_bind(s, (struct sockaddr *)(void *)&un_addr,
sizeof(struct sockaddr_un));
if (ret == 0) {
switch (si->family) {
case AF_INET:
return 0;
+#ifdef HAVE_IPV6
+ case AF_INET6:
+ return 0;
+#endif
default:
errno = ENOPROTOOPT;
return -1;
}
}
+_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;
+}
+
+static ssize_t swrap_sendmsg_before(int fd,
+ struct socket_info *si,
+ struct msghdr *msg,
+ struct iovec *tmp_iov,
+ struct sockaddr_un *tmp_un,
+ const struct sockaddr_un **to_un,
+ const struct sockaddr **to,
+ int *bcast)
+{
+ size_t i, len = 0;
+ ssize_t ret;
+
+ if (to_un) {
+ *to_un = NULL;
+ }
+ if (to) {
+ *to = NULL;
+ }
+ if (bcast) {
+ *bcast = 0;
+ }
+
+ switch (si->type) {
+ case SOCK_STREAM:
+ if (!si->connected) {
+ errno = ENOTCONN;
+ return -1;
+ }
+
+ if (msg->msg_iovlen == 0) {
+ break;
+ }
+
+ /*
+ * cut down to 1500 byte packets for stream sockets,
+ * which makes it easier to format PCAP capture files
+ * (as the caller will simply continue from here)
+ */
+
+ for (i=0; i < msg->msg_iovlen; i++) {
+ size_t nlen;
+ nlen = len + msg->msg_iov[i].iov_len;
+ if (nlen > 1500) {
+ break;
+ }
+ }
+ msg->msg_iovlen = i;
+ if (msg->msg_iovlen == 0) {
+ *tmp_iov = msg->msg_iov[0];
+ tmp_iov->iov_len = MIN(tmp_iov->iov_len, 1500);
+ msg->msg_iov = tmp_iov;
+ msg->msg_iovlen = 1;
+ }
+ break;
+
+ case SOCK_DGRAM:
+ if (si->connected) {
+ if (msg->msg_name) {
+ errno = EISCONN;
+ return -1;
+ }
+ } else {
+ const struct sockaddr *msg_name;
+ msg_name = (const struct sockaddr *)msg->msg_name;
+
+ if (msg_name == NULL) {
+ errno = ENOTCONN;
+ return -1;
+ }
+
+
+ ret = sockaddr_convert_to_un(si, msg_name, msg->msg_namelen,
+ tmp_un, 0, bcast);
+ if (ret == -1) return -1;
+
+ if (to_un) {
+ *to_un = tmp_un;
+ }
+ if (to) {
+ *to = msg_name;
+ }
+ msg->msg_name = tmp_un;
+ msg->msg_namelen = sizeof(*tmp_un);
+ }
+
+ if (si->bound == 0) {
+ ret = swrap_auto_bind(fd, si, si->family);
+ if (ret == -1) return -1;
+ }
+
+ if (!si->defer_connect) {
+ break;
+ }
+
+ ret = sockaddr_convert_to_un(si, si->peername, si->peername_len,
+ tmp_un, 0, NULL);
+ if (ret == -1) return -1;
+
+ ret = real_connect(fd, (struct sockaddr *)(void *)tmp_un,
+ sizeof(*tmp_un));
+
+ /* to give better errors */
+ if (ret == -1 && errno == ENOENT) {
+ errno = EHOSTUNREACH;
+ }
+
+ if (ret == -1) {
+ return ret;
+ }
+
+ si->defer_connect = 0;
+ break;
+ default:
+ errno = EHOSTUNREACH;
+ return -1;
+ }
+
+ return 0;
+}
+
+static void swrap_sendmsg_after(struct socket_info *si,
+ struct msghdr *msg,
+ const struct sockaddr *to,
+ ssize_t ret)
+{
+ int saved_errno = errno;
+ size_t i, len = 0;
+ uint8_t *buf;
+ off_t ofs = 0;
+ size_t avail = 0;
+ size_t remain;
+
+ /* to give better errors */
+ if (ret == -1 && saved_errno == ENOENT) {
+ saved_errno = EHOSTUNREACH;
+ }
+
+ for (i=0; i < msg->msg_iovlen; i++) {
+ avail += msg->msg_iov[i].iov_len;
+ }
+
+ if (ret == -1) {
+ remain = MIN(80, avail);
+ } else {
+ remain = ret;
+ }
+
+ /* we capture it as one single packet */
+ buf = (uint8_t *)malloc(remain);
+ if (!buf) {
+ /* we just not capture the packet */
+ errno = saved_errno;
+ return;
+ }
+
+ for (i=0; i < msg->msg_iovlen; i++) {
+ size_t this_time = MIN(remain, msg->msg_iov[i].iov_len);
+ memcpy(buf + ofs,
+ msg->msg_iov[i].iov_base,
+ this_time);
+ ofs += this_time;
+ remain -= this_time;
+ }
+ len = ofs;
+
+ switch (si->type) {
+ case SOCK_STREAM:
+ 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, len);
+ }
+ break;
+
+ case SOCK_DGRAM:
+ if (si->connected) {
+ to = si->peername;
+ }
+ 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, len);
+ }
+ break;
+ }
+
+ free(buf);
+ errno = saved_errno;
+}
+
_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);
+ struct sockaddr_storage ss;
+ socklen_t ss_len = sizeof(ss);
if (!si) {
return real_recvfrom(s, buf, len, flags, from, fromlen);
}
- len = MIN(len, 1500);
+ if (!from) {
+ from = (struct sockaddr *)(void *)&ss;
+ fromlen = &ss_len;
+ }
+
+ if (si->type == SOCK_STREAM) {
+ /* cut down to 1500 byte packets for stream sockets,
+ * which makes it easier to format PCAP capture files
+ * (as the caller will simply continue from here) */
+ 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);
+ ret = real_recvfrom(s, buf, len, flags,
+ (struct sockaddr *)(void *)&un_addr, &un_addrlen);
if (ret == -1)
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 msghdr msg;
+ struct iovec tmp;
struct sockaddr_un un_addr;
- int ret;
+ const struct sockaddr_un *to_un = NULL;
+ ssize_t ret;
struct socket_info *si = find_socket_info(s);
int bcast = 0;
return real_sendto(s, buf, len, flags, to, tolen);
}
- len = MIN(len, 1500);
+ tmp.iov_base = discard_const_p(char, buf);
+ tmp.iov_len = len;
- 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;
+ ZERO_STRUCT(msg);
+ msg.msg_name = discard_const_p(struct sockaddr, to); /* optional address */
+ msg.msg_namelen = tolen; /* size of address */
+ msg.msg_iov = &tmp; /* scatter/gather array */
+ msg.msg_iovlen = 1; /* # elements in msg_iov */
+#if 0 /* not available on solaris */
+ msg.msg_control = NULL; /* ancillary data, see below */
+ msg.msg_controllen = 0; /* ancillary data buffer len */
+ msg.msg_flags = 0; /* flags on received message */
+#endif
+
+ ret = swrap_sendmsg_before(s, si, &msg, &tmp, &un_addr, &to_un, &to, &bcast);
+ if (ret == -1) return -1;
+
+ buf = msg.msg_iov[0].iov_base;
+ len = msg.msg_iov[0].iov_len;
+
+ 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 *)(void *)&un_addr,
+ sizeof(un_addr));
}
-
- 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 len;
}
+ ret = real_sendto(s, buf, len, flags, (struct sockaddr *)msg.msg_name,
+ msg.msg_namelen);
+
+ swrap_sendmsg_after(si, &msg, to, ret);
+
return ret;
}
-_PUBLIC_ int swrap_ioctl(int s, int r, void *p)
+_PUBLIC_ ssize_t swrap_recv(int s, void *buf, size_t len, int flags)
{
int ret;
struct socket_info *si = find_socket_info(s);
- int value;
if (!si) {
- return real_ioctl(s, r, p);
+ return real_recv(s, buf, len, flags);
}
- ret = real_ioctl(s, r, p);
+ if (si->type == SOCK_STREAM) {
+ /* cut down to 1500 byte packets for stream sockets,
+ * which makes it easier to format PCAP capture files
+ * (as the caller will simply continue from here) */
+ len = MIN(len, 1500);
+ }
- 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;
+ 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 if (ret > 0) {
+ swrap_dump_packet(si, NULL, SWRAP_RECV, buf, ret);
}
return ret;
}
-_PUBLIC_ ssize_t swrap_recv(int s, void *buf, size_t len, int flags)
+_PUBLIC_ ssize_t swrap_read(int s, void *buf, size_t len)
{
int ret;
struct socket_info *si = find_socket_info(s);
if (!si) {
- return real_recv(s, buf, len, flags);
+ return real_read(s, buf, len);
}
- len = MIN(len, 1500);
+ if (si->type == SOCK_STREAM) {
+ /* cut down to 1500 byte packets for stream sockets,
+ * which makes it easier to format PCAP capture files
+ * (as the caller will simply continue from here) */
+ len = MIN(len, 1500);
+ }
- ret = real_recv(s, buf, len, flags);
+ ret = real_read(s, buf, len);
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 {
+ } else if (ret > 0) {
swrap_dump_packet(si, NULL, SWRAP_RECV, buf, ret);
}
_PUBLIC_ ssize_t swrap_send(int s, const void *buf, size_t len, int flags)
{
- int ret;
+ struct msghdr msg;
+ struct iovec tmp;
+ struct sockaddr_un un_addr;
+ ssize_t ret;
struct socket_info *si = find_socket_info(s);
if (!si) {
return real_send(s, buf, len, flags);
}
- len = MIN(len, 1500);
+ tmp.iov_base = discard_const_p(char, buf);
+ tmp.iov_len = len;
+
+ ZERO_STRUCT(msg);
+ msg.msg_name = NULL; /* optional address */
+ msg.msg_namelen = 0; /* size of address */
+ msg.msg_iov = &tmp; /* scatter/gather array */
+ msg.msg_iovlen = 1; /* # elements in msg_iov */
+#if 0 /* not available on solaris */
+ msg.msg_control = NULL; /* ancillary data, see below */
+ msg.msg_controllen = 0; /* ancillary data buffer len */
+ msg.msg_flags = 0; /* flags on received message */
+#endif
+
+ ret = swrap_sendmsg_before(s, si, &msg, &tmp, &un_addr, NULL, NULL, NULL);
+ if (ret == -1) return -1;
+
+ buf = msg.msg_iov[0].iov_base;
+ len = msg.msg_iov[0].iov_len;
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);
+ swrap_sendmsg_after(si, &msg, NULL, ret);
+
+ return ret;
+}
+
+_PUBLIC_ ssize_t swrap_sendmsg(int s, const struct msghdr *omsg, int flags)
+{
+ struct msghdr msg;
+ struct iovec tmp;
+ struct sockaddr_un un_addr;
+ const struct sockaddr_un *to_un = NULL;
+ const struct sockaddr *to = NULL;
+ ssize_t ret;
+ struct socket_info *si = find_socket_info(s);
+ int bcast = 0;
+
+ if (!si) {
+ return real_sendmsg(s, omsg, flags);
+ }
+
+ tmp.iov_base = NULL;
+ tmp.iov_len = 0;
+
+ msg = *omsg;
+#if 0
+ msg.msg_name = omsg->msg_name; /* optional address */
+ msg.msg_namelen = omsg->msg_namelen; /* size of address */
+ msg.msg_iov = omsg->msg_iov; /* scatter/gather array */
+ msg.msg_iovlen = omsg->msg_iovlen; /* # elements in msg_iov */
+ /* the following is not available on solaris */
+ msg.msg_control = omsg->msg_control; /* ancillary data, see below */
+ msg.msg_controllen = omsg->msg_controllen; /* ancillary data buffer len */
+ msg.msg_flags = omsg->msg_flags; /* flags on received message */
+#endif
+
+ ret = swrap_sendmsg_before(s, si, &msg, &tmp, &un_addr, &to_un, &to, &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;
+ size_t i, len = 0;
+ uint8_t *buf;
+ off_t ofs = 0;
+ size_t avail = 0;
+ size_t remain;
+
+ for (i=0; i < msg.msg_iovlen; i++) {
+ avail += msg.msg_iov[i].iov_len;
+ }
+
+ len = avail;
+ remain = avail;
+
+ /* we capture it as one single packet */
+ buf = (uint8_t *)malloc(remain);
+ if (!buf) {
+ return -1;
+ }
+
+ for (i=0; i < msg.msg_iovlen; i++) {
+ size_t this_time = MIN(remain, msg.msg_iov[i].iov_len);
+ memcpy(buf + ofs,
+ msg.msg_iov[i].iov_base,
+ this_time);
+ ofs += this_time;
+ remain -= this_time;
+ }
+
+ 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;
+
+ msg.msg_name = &un_addr; /* optional address */
+ msg.msg_namelen = sizeof(un_addr); /* size of address */
+
+ /* ignore the any errors in broadcast sends */
+ real_sendmsg(s, &msg, flags);
+ }
+
+ swrap_dump_packet(si, to, SWRAP_SENDTO, buf, len);
+ free(buf);
+
+ return len;
+ }
+
+ ret = real_sendmsg(s, &msg, flags);
+
+ swrap_sendmsg_after(si, &msg, to, ret);
+
+ return ret;
+}
+
+int swrap_readv(int s, const struct iovec *vector, size_t count)
+{
+ int ret;
+ struct socket_info *si = find_socket_info(s);
+ struct iovec v;
+
+ if (!si) {
+ return real_readv(s, vector, count);
+ }
+
+ if (!si->connected) {
+ errno = ENOTCONN;
+ return -1;
+ }
+
+ if (si->type == SOCK_STREAM && count > 0) {
+ /* cut down to 1500 byte packets for stream sockets,
+ * which makes it easier to format PCAP capture files
+ * (as the caller will simply continue from here) */
+ size_t i, len = 0;
+
+ for (i=0; i < count; i++) {
+ size_t nlen;
+ nlen = len + vector[i].iov_len;
+ if (nlen > 1500) {
+ break;
+ }
+ }
+ count = i;
+ if (count == 0) {
+ v = vector[0];
+ v.iov_len = MIN(v.iov_len, 1500);
+ vector = &v;
+ count = 1;
+ }
+ }
+
+ ret = real_readv(s, vector, count);
+ 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 if (ret > 0) {
+ uint8_t *buf;
+ off_t ofs = 0;
+ size_t i;
+ size_t remain = ret;
+
+ /* we capture it as one single packet */
+ buf = (uint8_t *)malloc(ret);
+ if (!buf) {
+ /* we just not capture the packet */
+ errno = 0;
+ return ret;
+ }
+
+ for (i=0; i < count; i++) {
+ size_t this_time = MIN(remain, vector[i].iov_len);
+ memcpy(buf + ofs,
+ vector[i].iov_base,
+ this_time);
+ ofs += this_time;
+ remain -= this_time;
+ }
+
+ swrap_dump_packet(si, NULL, SWRAP_RECV, buf, ret);
+ free(buf);
}
return ret;
}
+int swrap_writev(int s, const struct iovec *vector, size_t count)
+{
+ struct msghdr msg;
+ struct iovec tmp;
+ struct sockaddr_un un_addr;
+ ssize_t ret;
+ struct socket_info *si = find_socket_info(s);
+
+ if (!si) {
+ return real_writev(s, vector, count);
+ }
+
+ tmp.iov_base = NULL;
+ tmp.iov_len = 0;
+
+ ZERO_STRUCT(msg);
+ msg.msg_name = NULL; /* optional address */
+ msg.msg_namelen = 0; /* size of address */
+ msg.msg_iov = discard_const_p(struct iovec, vector); /* scatter/gather array */
+ msg.msg_iovlen = count; /* # elements in msg_iov */
+#if 0 /* not available on solaris */
+ msg.msg_control = NULL; /* ancillary data, see below */
+ msg.msg_controllen = 0; /* ancillary data buffer len */
+ msg.msg_flags = 0; /* flags on received message */
+#endif
+
+ ret = swrap_sendmsg_before(s, si, &msg, &tmp, &un_addr, NULL, NULL, NULL);
+ if (ret == -1) return -1;
+
+ ret = real_writev(s, msg.msg_iov, msg.msg_iovlen);
+
+ swrap_sendmsg_after(si, &msg, NULL, ret);
+
+ return ret;
+}
+
_PUBLIC_ int swrap_close(int fd)
{
struct socket_info *si = find_socket_info(fd);
+ struct socket_info_fd *fi;
int ret;
if (!si) {
return real_close(fd);
}
+ for (fi = si->fds; fi; fi = fi->next) {
+ if (fi->fd == fd) {
+ SWRAP_DLIST_REMOVE(si->fds, fi);
+ free(fi);
+ break;
+ }
+ }
+
+ if (si->fds) {
+ /* there are still references left */
+ return real_close(fd);
+ }
+
SWRAP_DLIST_REMOVE(sockets, si);
if (si->myname && si->peername) {
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) {
return ret;
}
+
+_PUBLIC_ int swrap_dup(int fd)
+{
+ struct socket_info *si;
+ struct socket_info_fd *fi;
+
+ si = find_socket_info(fd);
+
+ if (!si) {
+ return real_dup(fd);
+ }
+
+ fi = (struct socket_info_fd *)calloc(1, sizeof(struct socket_info_fd));
+ if (fi == NULL) {
+ errno = ENOMEM;
+ return -1;
+ }
+
+ fi->fd = real_dup(fd);
+ if (fi->fd == -1) {
+ int saved_errno = errno;
+ free(fi);
+ errno = saved_errno;
+ return -1;
+ }
+
+ SWRAP_DLIST_ADD(si->fds, fi);
+ return fi->fd;
+}
+
+_PUBLIC_ int swrap_dup2(int fd, int newfd)
+{
+ struct socket_info *si;
+ struct socket_info_fd *fi;
+
+ si = find_socket_info(fd);
+
+ if (!si) {
+ return real_dup2(fd, newfd);
+ }
+
+ if (find_socket_info(newfd)) {
+ /* dup2() does an implicit close of newfd, which we
+ * need to emulate */
+ swrap_close(newfd);
+ }
+
+ fi = (struct socket_info_fd *)calloc(1, sizeof(struct socket_info_fd));
+ if (fi == NULL) {
+ errno = ENOMEM;
+ return -1;
+ }
+
+ fi->fd = real_dup2(fd, newfd);
+ if (fi->fd == -1) {
+ int saved_errno = errno;
+ free(fi);
+ errno = saved_errno;
+ return -1;
+ }
+
+ SWRAP_DLIST_ADD(si->fds, fi);
+ return fi->fd;
+}
git.samba.org / amitay / samba.git / blobdiff