/*
device.c -- multicast socket
Copyright (C) 2002-2005 Ivo Timmermans,
- 2002-2012 Guus Sliepen <guus@tinc-vpn.org>
+ 2002-2013 Guus Sliepen <guus@tinc-vpn.org>
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
static char *device_info;
-static uint64_t device_total_in = 0;
-static uint64_t device_total_out = 0;
-
static struct addrinfo *ai = NULL;
static mac_t ignore_src = {{0}};
static bool setup_device(void) {
- char *host;
+ char *host = NULL;
char *port;
char *space;
int ttl = 1;
get_config_string(lookup_config(config_tree, "Interface"), &iface);
if(!get_config_string(lookup_config(config_tree, "Device"), &device)) {
- logger(LOG_ERR, "Device variable required for %s", device_info);
- return false;
+ logger(DEBUG_ALWAYS, LOG_ERR, "Device variable required for %s", device_info);
+ goto error;
}
host = xstrdup(device);
space = strchr(host, ' ');
if(!space) {
- logger(LOG_ERR, "Port number required for %s", device_info);
- return false;
+ logger(DEBUG_ALWAYS, LOG_ERR, "Port number required for %s", device_info);
+ goto error;
}
*space++ = 0;
ai = str2addrinfo(host, port, SOCK_DGRAM);
if(!ai)
- return false;
+ goto error;
device_fd = socket(ai->ai_family, SOCK_DGRAM, IPPROTO_UDP);
if(device_fd < 0) {
- logger(LOG_ERR, "Creating socket failed: %s", sockstrerror(sockerrno));
- return false;
+ logger(DEBUG_ALWAYS, LOG_ERR, "Creating socket failed: %s", sockstrerror(sockerrno));
+ goto error;
}
#ifdef FD_CLOEXEC
setsockopt(device_fd, SOL_SOCKET, SO_REUSEADDR, (void *)&one, sizeof one);
if(bind(device_fd, ai->ai_addr, ai->ai_addrlen)) {
- closesocket(device_fd);
- logger(LOG_ERR, "Can't bind to %s %s: %s", host, port, sockstrerror(sockerrno));
- return false;
+ logger(DEBUG_ALWAYS, LOG_ERR, "Can't bind to %s %s: %s", host, port, sockstrerror(sockerrno));
+ goto error;
}
switch(ai->ai_family) {
mreq.imr_multiaddr.s_addr = in.sin_addr.s_addr;
mreq.imr_interface.s_addr = htonl(INADDR_ANY);
if(setsockopt(device_fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (void *)&mreq, sizeof mreq)) {
- logger(LOG_ERR, "Cannot join multicast group %s %s: %s", host, port, sockstrerror(sockerrno));
- closesocket(device_fd);
- return false;
+ logger(DEBUG_ALWAYS, LOG_ERR, "Cannot join multicast group %s %s: %s", host, port, sockstrerror(sockerrno));
+ goto error;
}
#ifdef IP_MULTICAST_LOOP
setsockopt(device_fd, IPPROTO_IP, IP_MULTICAST_LOOP, (const void *)&one, sizeof one);
memcpy(&mreq.ipv6mr_multiaddr, &in6.sin6_addr, sizeof mreq.ipv6mr_multiaddr);
mreq.ipv6mr_interface = in6.sin6_scope_id;
if(setsockopt(device_fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, (void *)&mreq, sizeof mreq)) {
- logger(LOG_ERR, "Cannot join multicast group %s %s: %s", host, port, sockstrerror(sockerrno));
- closesocket(device_fd);
- return false;
+ logger(DEBUG_ALWAYS, LOG_ERR, "Cannot join multicast group %s %s: %s", host, port, sockstrerror(sockerrno));
+ goto error;
}
#ifdef IPV6_MULTICAST_LOOP
setsockopt(device_fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, (const void *)&one, sizeof one);
#endif
} break;
#endif
-
+
default:
- logger(LOG_ERR, "Multicast for address family %hx unsupported", ai->ai_family);
- closesocket(device_fd);
- return false;
+ logger(DEBUG_ALWAYS, LOG_ERR, "Multicast for address family %x unsupported", ai->ai_family);
+ goto error;
}
- logger(LOG_INFO, "%s is a %s", device, device_info);
+ logger(DEBUG_ALWAYS, LOG_INFO, "%s is a %s", device, device_info);
return true;
+
+error:
+ if(device_fd >= 0)
+ closesocket(device_fd);
+ if(ai)
+ freeaddrinfo(ai);
+ free(host);
+
+ return false;
}
static void close_device(void) {
- close(device_fd);
+ close(device_fd); device_fd = -1;
- free(device);
- free(iface);
+ free(device); device = NULL;
+ free(iface); iface = NULL;
- if(ai)
- freeaddrinfo(ai);
+ if(ai) {
+ freeaddrinfo(ai); ai = NULL;
+ }
+ device_info = NULL;
}
static bool read_packet(vpn_packet_t *packet) {
int lenin;
- if((lenin = recv(device_fd, packet->data, MTU, 0)) <= 0) {
- logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
- device, strerror(errno));
+ if((lenin = recv(device_fd, DATA(packet), MTU, 0)) <= 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info,
+ device, sockstrerror(sockerrno));
return false;
}
- if(!memcmp(&ignore_src, packet->data + 6, sizeof ignore_src)) {
- ifdebug(SCARY_THINGS) logger(LOG_DEBUG, "Ignoring loopback packet of %d bytes from %s", lenin, device_info);
- packet->len = 0;
- return true;
+ if(!memcmp(&ignore_src, DATA(packet) + 6, sizeof ignore_src)) {
+ logger(DEBUG_SCARY_THINGS, LOG_DEBUG, "Ignoring loopback packet of %d bytes from %s", lenin, device_info);
+ return false;
}
packet->len = lenin;
- device_total_in += packet->len;
-
- ifdebug(TRAFFIC) logger(LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
+ logger(DEBUG_TRAFFIC, LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
device_info);
return true;
}
static bool write_packet(vpn_packet_t *packet) {
- ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s",
+ logger(DEBUG_TRAFFIC, LOG_DEBUG, "Writing packet of %d bytes to %s",
packet->len, device_info);
- if(sendto(device_fd, packet->data, packet->len, 0, ai->ai_addr, ai->ai_addrlen) < 0) {
- logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device,
- strerror(errno));
+ if(sendto(device_fd, DATA(packet), packet->len, 0, ai->ai_addr, ai->ai_addrlen) < 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Can't write to %s %s: %s", device_info, device,
+ sockstrerror(sockerrno));
return false;
}
- device_total_out += packet->len;
-
- memcpy(&ignore_src, packet->data + 6, sizeof ignore_src);
+ memcpy(&ignore_src, DATA(packet) + 6, sizeof ignore_src);
return true;
}
-static void dump_device_stats(void) {
- logger(LOG_DEBUG, "Statistics for %s %s:", device_info, device);
- logger(LOG_DEBUG, " total bytes in: %10"PRIu64, device_total_in);
- logger(LOG_DEBUG, " total bytes out: %10"PRIu64, device_total_out);
-}
-
const devops_t multicast_devops = {
.setup = setup_device,
.close = close_device,
.read = read_packet,
.write = write_packet,
- .dump_stats = dump_device_stats,
};
-
-#if 0
-
-static bool not_supported(void) {
- logger(LOG_ERR, "Raw socket device not supported on this platform");
- return false;
-}
-
-const devops_t multicast_devops = {
- .setup = not_supported,
- .close = NULL,
- .read = NULL,
- .write = NULL,
- .dump_stats = NULL,
-};
-#endif
projects / tinc / blobdiff