/*
device.c -- multicast socket
Copyright (C) 2002-2005 Ivo Timmermans,
- 2002-2012 Guus Sliepen <guus@tinc-vpn.org>
+ 2002-2014 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
#include "route.h"
#include "xalloc.h"
-static char *device_info;
+static const char *device_info = "multicast socket";
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 mac_t ignore_src = {{0}};
static bool setup_device(void) {
char *host;
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(LOG_ERR, "Port number required for %s", device_info);
+ free(host);
return false;
}
}
ai = str2addrinfo(host, port, SOCK_DGRAM);
- if(!ai)
+
+ if(!ai) {
+ free(host);
return false;
+ }
device_fd = socket(ai->ai_family, SOCK_DGRAM, IPPROTO_UDP);
+
if(device_fd < 0) {
logger(LOG_ERR, "Creating socket failed: %s", sockstrerror(sockerrno));
+ free(host);
return false;
}
#endif
static const int one = 1;
- setsockopt(device_fd, SOL_SOCKET, SO_REUSEADDR, (void *)&one, sizeof one);
+ 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));
+ free(host);
return false;
}
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, &mreq, sizeof mreq)) {
- logger(LOG_ERR, "Cannot join multicast group %s %s: %s", host, port, sockstrerror(sockerrno));
- closesocket(device_fd);
- return false;
- }
+
+ 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(LOG_ERR, "Cannot join multicast group %s %s: %s", host, port, sockstrerror(sockerrno));
+ closesocket(device_fd);
+ free(host);
+ return false;
+ }
+
#ifdef IP_MULTICAST_LOOP
- setsockopt(device_fd, IPPROTO_IP, IP_MULTICAST_LOOP, &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, &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, &mreq, sizeof mreq)) {
- logger(LOG_ERR, "Cannot join multicast group %s %s: %s", host, port, sockstrerror(sockerrno));
- closesocket(device_fd);
- return false;
- }
+
+ 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(LOG_ERR, "Cannot join multicast group %s %s: %s", host, port, sockstrerror(sockerrno));
+ closesocket(device_fd);
+ free(host);
+ return false;
+ }
+
#ifdef IPV6_MULTICAST_LOOP
- setsockopt(device_fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &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, &ttl, sizeof ttl);
+ setsockopt(device_fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, (void *)&ttl, sizeof(ttl));
#endif
- } break;
+ }
+ break;
#endif
-
- default:
- logger(LOG_ERR, "Multicast for address family %hx unsupported", ai->ai_family);
- closesocket(device_fd);
- return false;
+
+ default:
+ logger(LOG_ERR, "Multicast for address family %x unsupported", ai->ai_family);
+ closesocket(device_fd);
+ free(host);
+ return false;
}
+ free(host);
logger(LOG_INFO, "%s is a %s", device, device_info);
return true;
free(device);
free(iface);
- if(ai)
+ if(ai) {
freeaddrinfo(ai);
+ }
}
static bool read_packet(vpn_packet_t *packet) {
int lenin;
- if((lenin = recv(device_fd, packet->data, MTU, 0)) <= 0) {
+ if((lenin = recv(device_fd, (void *)packet->data, MTU, 0)) <= 0) {
logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
- device, strerror(errno));
+ device, strerror(errno));
return false;
}
- if(!memcmp(&ignore_src, packet->data + 6, sizeof ignore_src)) {
+ 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;
device_total_in += packet->len;
ifdebug(TRAFFIC) logger(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) {
ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s",
- packet->len, device_info);
+ packet->len, device_info);
- if(sendto(device_fd, packet->data, packet->len, 0, ai->ai_addr, ai->ai_addrlen) < 0) {
+ if(sendto(device_fd, (void *)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));
+ strerror(errno));
return false;
}
device_total_out += packet->len;
- memcpy(&ignore_src, packet->data + 6, sizeof ignore_src);
+ memcpy(&ignore_src, packet->data + 6, sizeof(ignore_src));
return true;
}