4 This file is part of avahi.
6 avahi is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as
8 published by the Free Software Foundation; either version 2.1 of the
9 License, or (at your option) any later version.
11 avahi is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
14 Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with avahi; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
26 #include <avahi-common/malloc.h>
32 #include <sys/types.h>
33 #include <sys/socket.h>
34 #include <sys/sysctl.h>
36 #include <net/route.h>
38 #include <net/if_dl.h>
39 #include <netinet/in.h>
43 #include "iface-pfroute.h"
46 static int bitcount (unsigned int n)
57 static void rtm_info(struct rt_msghdr *rtm, AvahiInterfaceMonitor *m)
60 struct if_msghdr *ifm = (struct if_msghdr *)rtm;
61 struct sockaddr_dl *sdl = (struct sockaddr_dl *)(ifm + 1);
63 if (sdl->sdl_family != AF_LINK)
66 if (ifm->ifm_addrs == 0 && ifm->ifm_index > 0) {
67 if (!(hw = avahi_interface_monitor_get_hw_interface(m, (AvahiIfIndex) ifm->ifm_index)))
69 avahi_hw_interface_free(hw, 0);
73 if (!(hw = avahi_interface_monitor_get_hw_interface(m, ifm->ifm_index)))
74 if (!(hw = avahi_hw_interface_new(m, (AvahiIfIndex) ifm->ifm_index)))
78 (ifm->ifm_flags & IFF_UP) &&
79 (!m->server->config.use_iff_running || (ifm->ifm_flags & IFF_RUNNING)) &&
80 !(ifm->ifm_flags & IFF_LOOPBACK) &&
81 (ifm->ifm_flags & IFF_MULTICAST) &&
82 !(ifm->ifm_flags & IFF_POINTOPOINT);
85 hw->name = avahi_strndup(sdl->sdl_data, sdl->sdl_nlen);
87 hw->mtu = ifm->ifm_data.ifi_mtu;
89 hw->mac_address_size = sdl->sdl_alen;
90 if (hw->mac_address_size > AVAHI_MAX_MAC_ADDRESS)
91 hw->mac_address_size = AVAHI_MAX_MAC_ADDRESS;
93 memcpy(hw->mac_address, sdl->sdl_data + sdl->sdl_nlen, hw->mac_address_size);
95 avahi_log_debug("======\n name: %s\n index:%d\n mtu:%d\n mac:%s\n flags_ok:%d\n======",
98 avahi_format_mac_address(hw->mac_address, hw->mac_address_size),
101 avahi_hw_interface_check_relevant(hw);
102 avahi_hw_interface_update_rrs(hw, 0);
106 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
107 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
109 static void rtm_addr(struct rt_msghdr *rtm, AvahiInterfaceMonitor *m)
111 AvahiInterface *iface;
114 struct ifa_msghdr *ifam = (struct ifa_msghdr *) rtm;
115 char *cp = (char *)(ifam + 1);
116 int addrs = ifam->ifam_addrs;
119 struct sockaddr *sa =NULL;
121 if(((struct sockaddr *)cp)->sa_family != AF_INET && ((struct sockaddr *)cp)->sa_family != AF_INET6)
124 if (!(iface = avahi_interface_monitor_get_interface(m, (AvahiIfIndex) ifam->ifam_index, avahi_af_to_proto(((struct sockaddr *)cp)->sa_family))))
127 raddr.proto = avahi_af_to_proto(((struct sockaddr *)cp)->sa_family);
129 for(i = 0; addrs != 0 && i < RTAX_MAX; addrs &= ~(1<<i), i++)
133 sa = (struct sockaddr *)cp;
136 switch(sa->sa_family) {
140 prefixlen = bitcount(((struct sockaddr_in *)sa)->sin_addr.s_addr);
143 memcpy(raddr.data.data, &((struct sockaddr_in *)sa)->sin_addr, sizeof(struct in_addr));
163 if(rtm->rtm_type == RTM_NEWADDR)
165 AvahiInterfaceAddress *addriface;
166 if (!(addriface = avahi_interface_monitor_get_address(m, iface, &raddr)))
167 if (!(addriface = avahi_interface_address_new(m, iface, &raddr, prefixlen)))
170 /* addriface->global_scope = ifaddrmsg->ifa_scope == RT_SCOPE_UNIVERSE || ifaddrmsg->ifa_scope == RT_SCOPE_SITE; */
171 addriface->global_scope = 1;
175 AvahiInterfaceAddress *addriface;
176 assert(rtm->rtm_type == RTM_DELADDR);
177 if (!(addriface = avahi_interface_monitor_get_address(m, iface, &raddr)))
179 avahi_interface_address_free(addriface);
182 avahi_interface_check_relevant(iface);
183 avahi_interface_update_rrs(iface, 0);
186 static void parse_rtmsg(struct rt_msghdr *rtm, int msglen, AvahiInterfaceMonitor *m)
191 if (rtm->rtm_version != RTM_VERSION) {
192 avahi_log_warn("routing message version %d not understood",
197 switch (rtm->rtm_type) {
210 static void socket_event(AvahiWatch *w, int fd, AvahiWatchEvent event,void *userdata) {
211 AvahiInterfaceMonitor *m = (AvahiInterfaceMonitor *)userdata;
212 AvahiPfRoute *nl = m->osdep.pfroute;
219 assert(fd == nl->fd);
222 time_t now = time(NULL);
223 if((bytes = recv(nl->fd, msg, 2048, MSG_DONTWAIT)) < 0) {
224 if (errno == EAGAIN || errno == EINTR)
226 avahi_log_error(__FILE__": recv() failed: %s", strerror(errno));
230 avahi_log_debug("socket_event: got message of size %d on %s", (int)bytes, ctime(&now));
231 parse_rtmsg((struct rt_msghdr *)msg, bytes ,m);
236 int avahi_interface_monitor_init_osdep(AvahiInterfaceMonitor *m) {
238 m->osdep.pfroute = NULL;
242 if ((fd = socket(PF_ROUTE, SOCK_RAW, AF_UNSPEC)) < 0) {
243 avahi_log_error(__FILE__": socket(PF_ROUTE): %s", strerror(errno));
247 if (!(m->osdep.pfroute = avahi_new(AvahiPfRoute , 1))) {
248 avahi_log_error(__FILE__": avahi_new() failed.");
251 m->osdep.pfroute->fd = fd;
253 if (!(m->osdep.pfroute->watch = m->server->poll_api->watch_new(m->server->poll_api,
254 m->osdep.pfroute->fd,
258 avahi_log_error(__FILE__": Failed to create watch.");
266 if (m->osdep.pfroute) {
267 if (m->osdep.pfroute->watch)
268 m->osdep.pfroute->poll_api->watch_free(m->osdep.pfroute->watch);
273 m->osdep.pfroute = NULL;
279 void avahi_interface_monitor_free_osdep(AvahiInterfaceMonitor *m) {
282 if (m->osdep.pfroute) {
283 if (m->osdep.pfroute->watch)
284 m->osdep.pfroute->poll_api->watch_free(m->osdep.pfroute->watch);
286 if (m->osdep.pfroute->fd >= 0)
287 close(m->osdep.pfroute->fd);
289 avahi_free(m->osdep.pfroute);
290 m->osdep.pfroute = NULL;
294 void avahi_interface_monitor_sync(AvahiInterfaceMonitor *m) {
297 char *buf, *lim, *next, count = 0;
298 struct rt_msghdr *rtm;
305 mib[2] = 0; /* protocol */
306 mib[3] = 0; /* wildcard address family */
307 mib[4] = NET_RT_IFLIST;
308 mib[5] = 0; /* no flags */
309 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
311 if ((buf = avahi_malloc(needed)) == NULL)
313 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
314 if (errno == ENOMEM && count++ < 10) {
321 for (next = buf; next < lim; next += rtm->rtm_msglen) {
322 rtm = (struct rt_msghdr *)next;
323 parse_rtmsg(rtm, rtm->rtm_msglen, m);
326 m->list_complete = 1;
327 avahi_interface_monitor_check_relevant(m);
328 avahi_interface_monitor_update_rrs(m, 0);
329 avahi_log_info("Network interface enumeration completed.");