#include "route.h"
#include "xalloc.h"
-static char *device_info;
+static const char *device_info = "multicast socket";
static struct addrinfo *ai = NULL;
static mac_t ignore_src = {{0}};
char *space;
int ttl = 1;
- device_info = "multicast socket";
-
get_config_string(lookup_config(config_tree, "Interface"), &iface);
if(!get_config_string(lookup_config(config_tree, "Device"), &device)) {
host = xstrdup(device);
space = strchr(host, ' ');
+
if(!space) {
logger(DEBUG_ALWAYS, LOG_ERR, "Port number required for %s", device_info);
goto error;
}
ai = str2addrinfo(host, port, SOCK_DGRAM);
- if(!ai)
+
+ if(!ai) {
goto error;
+ }
device_fd = socket(ai->ai_family, SOCK_DGRAM, IPPROTO_UDP);
+
if(device_fd < 0) {
logger(DEBUG_ALWAYS, LOG_ERR, "Creating socket failed: %s", sockstrerror(sockerrno));
goto error;
switch(ai->ai_family) {
#ifdef IP_ADD_MEMBERSHIP
- case AF_INET: {
- struct ip_mreq mreq;
- struct sockaddr_in in;
- memcpy(&in, ai->ai_addr, sizeof(in));
- 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(DEBUG_ALWAYS, LOG_ERR, "Cannot join multicast group %s %s: %s", host, port, sockstrerror(sockerrno));
- goto error;
- }
+
+ case AF_INET: {
+ struct ip_mreq mreq;
+ struct sockaddr_in in;
+ memcpy(&in, ai->ai_addr, sizeof(in));
+ 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(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));
+ setsockopt(device_fd, IPPROTO_IP, IP_MULTICAST_LOOP, (const void *)&one, sizeof(one));
#endif
#ifdef IP_MULTICAST_TTL
- setsockopt(device_fd, IPPROTO_IP, IP_MULTICAST_TTL, (void *)&ttl, sizeof(ttl));
+ setsockopt(device_fd, IPPROTO_IP, IP_MULTICAST_TTL, (void *)&ttl, sizeof(ttl));
#endif
- } break;
+ }
+ break;
#endif
#ifdef IPV6_JOIN_GROUP
- case AF_INET6: {
- struct ipv6_mreq mreq;
- struct sockaddr_in6 in6;
- memcpy(&in6, ai->ai_addr, sizeof(in6));
- 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(DEBUG_ALWAYS, LOG_ERR, "Cannot join multicast group %s %s: %s", host, port, sockstrerror(sockerrno));
- goto error;
- }
+
+ case AF_INET6: {
+ struct ipv6_mreq mreq;
+ struct sockaddr_in6 in6;
+ memcpy(&in6, ai->ai_addr, sizeof(in6));
+ 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(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));
+ setsockopt(device_fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, (const void *)&one, sizeof(one));
#endif
#ifdef IPV6_MULTICAST_HOPS
- setsockopt(device_fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, (void *)&ttl, sizeof(ttl));
+ setsockopt(device_fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, (void *)&ttl, sizeof(ttl));
#endif
- } break;
+ }
+ break;
#endif
- default:
- logger(DEBUG_ALWAYS, LOG_ERR, "Multicast for address family %x unsupported", ai->ai_family);
- goto error;
+ default:
+ logger(DEBUG_ALWAYS, LOG_ERR, "Multicast for address family %x unsupported", ai->ai_family);
+ goto error;
}
logger(DEBUG_ALWAYS, LOG_INFO, "%s is a %s", device, device_info);
return true;
error:
- if(device_fd >= 0)
+
+ if(device_fd >= 0) {
closesocket(device_fd);
- if(ai)
+ }
+
+ if(ai) {
freeaddrinfo(ai);
+ }
+
free(host);
return false;
}
static void close_device(void) {
- close(device_fd); device_fd = -1;
+ close(device_fd);
+ device_fd = -1;
- free(device); device = NULL;
- free(iface); iface = NULL;
+ free(device);
+ device = NULL;
+ free(iface);
+ iface = NULL;
if(ai) {
- freeaddrinfo(ai); ai = NULL;
+ freeaddrinfo(ai);
+ ai = NULL;
}
+
device_info = NULL;
}
if((lenin = recv(device_fd, (void *)DATA(packet), MTU, 0)) <= 0) {
logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info,
- device, sockstrerror(sockerrno));
+ device, sockstrerror(sockerrno));
return false;
}
packet->len = lenin;
logger(DEBUG_TRAFFIC, LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
- device_info);
+ device_info);
return true;
}
static bool write_packet(vpn_packet_t *packet) {
logger(DEBUG_TRAFFIC, LOG_DEBUG, "Writing packet of %d bytes to %s",
- packet->len, device_info);
+ packet->len, device_info);
if(sendto(device_fd, (void *)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));
+ sockstrerror(sockerrno));
return false;
}