539913b2819019a61179bb2e61e7819ed0cfe62d
2 * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License v2 as published by
6 * the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
18 #include <sys/ioctl.h>
19 #include <sys/socket.h>
34 static LIST_HEAD(pending_routes
);
35 LIST_HEAD(interfaces
);
38 static int host_timeout
;
39 static int host_ping_tries
;
41 static int forward_bcast
;
42 static int forward_dhcp
;
44 uint8_t local_addr
[4];
45 int local_route_table
;
47 struct relayd_pending_route
{
48 struct relayd_route rt
;
49 struct uloop_timeout timeout
;
53 static struct relayd_host
*find_host_by_ipaddr(struct relayd_interface
*rif
, const uint8_t *ipaddr
)
55 struct relayd_host
*host
;
58 list_for_each_entry(rif
, &interfaces
, list
) {
59 host
= find_host_by_ipaddr(rif
, ipaddr
);
68 list_for_each_entry(host
, &rif
->hosts
, list
) {
69 if (memcmp(ipaddr
, host
->ipaddr
, sizeof(host
->ipaddr
)) != 0)
77 static void add_arp(struct relayd_host
*host
)
79 struct sockaddr_in
*sin
;
82 strncpy(arp
.arp_dev
, host
->rif
->ifname
, sizeof(arp
.arp_dev
));
83 arp
.arp_flags
= ATF_COM
;
85 arp
.arp_ha
.sa_family
= ARPHRD_ETHER
;
86 memcpy(arp
.arp_ha
.sa_data
, host
->lladdr
, ETH_ALEN
);
88 sin
= (struct sockaddr_in
*) &arp
.arp_pa
;
89 sin
->sin_family
= AF_INET
;
90 memcpy(&sin
->sin_addr
, host
->ipaddr
, sizeof(host
->ipaddr
));
92 ioctl(inet_sock
, SIOCSARP
, &arp
);
95 static void timeout_host_route(struct uloop_timeout
*timeout
)
97 struct relayd_pending_route
*rt
;
99 rt
= container_of(timeout
, struct relayd_pending_route
, timeout
);
100 list_del(&rt
->rt
.list
);
104 void relayd_add_host_route(struct relayd_host
*host
, const uint8_t *dest
, uint8_t mask
)
106 struct relayd_route
*rt
;
108 list_for_each_entry(rt
, &host
->routes
, list
) {
109 if (!memcmp(rt
->dest
, dest
, sizeof(rt
->dest
)) && rt
->mask
== mask
)
113 rt
= calloc(1, sizeof(*rt
));
117 list_add(&rt
->list
, &host
->routes
);
118 memcpy(rt
->dest
, dest
, sizeof(rt
->dest
));
120 relayd_add_route(host
, rt
);
123 static void del_host(struct relayd_host
*host
)
125 struct relayd_route
*route
, *tmp
;
127 DPRINTF(1, "%s: deleting host "IP_FMT
" ("MAC_FMT
")\n", host
->rif
->ifname
,
128 IP_BUF(host
->ipaddr
), MAC_BUF(host
->lladdr
));
130 list_for_each_entry_safe(route
, tmp
, &host
->routes
, list
) {
131 relayd_del_route(host
, route
);
132 list_del(&route
->list
);
135 if (host
->rif
->managed
)
136 relayd_del_route(host
, NULL
);
137 uloop_timeout_cancel(&host
->timeout
);
138 list_del(&host
->list
);
142 static void fill_arp_packet(struct arp_packet
*pkt
, struct relayd_interface
*rif
,
143 const uint8_t spa
[4], const uint8_t tpa
[4])
145 memset(pkt
, 0, sizeof(*pkt
));
147 pkt
->eth
.ether_type
= htons(ETHERTYPE_ARP
);
148 memcpy(pkt
->eth
.ether_shost
, rif
->sll
.sll_addr
, ETH_ALEN
);
150 memcpy(pkt
->arp
.arp_sha
, rif
->sll
.sll_addr
, ETH_ALEN
);
151 memcpy(pkt
->arp
.arp_spa
, spa
, 4);
152 memcpy(pkt
->arp
.arp_tpa
, tpa
, 4);
154 pkt
->arp
.arp_hrd
= htons(ARPHRD_ETHER
);
155 pkt
->arp
.arp_pro
= htons(ETH_P_IP
);
156 pkt
->arp
.arp_hln
= ETH_ALEN
;
157 pkt
->arp
.arp_pln
= 4;
160 static void send_arp_request(struct relayd_interface
*rif
, const uint8_t *ipaddr
)
162 struct arp_packet pkt
;
164 fill_arp_packet(&pkt
, rif
, rif
->src_ip
, ipaddr
);
166 pkt
.arp
.arp_op
= htons(ARPOP_REQUEST
);
167 memcpy(pkt
.arp
.arp_spa
, rif
->src_ip
, ETH_ALEN
);
168 memset(pkt
.arp
.arp_tha
, 0, ETH_ALEN
);
169 memset(pkt
.eth
.ether_dhost
, 0xff, ETH_ALEN
);
171 DPRINTF(2, "%s: sending ARP who-has "IP_FMT
", tell "IP_FMT
" ("MAC_FMT
")\n",
172 rif
->ifname
, IP_BUF(pkt
.arp
.arp_tpa
),
173 IP_BUF(pkt
.arp
.arp_spa
), MAC_BUF(pkt
.eth
.ether_shost
));
175 sendto(rif
->fd
.fd
, &pkt
, sizeof(pkt
), 0,
176 (struct sockaddr
*) &rif
->sll
, sizeof(rif
->sll
));
179 void relayd_add_pending_route(const uint8_t *gateway
, const uint8_t *dest
, uint8_t mask
, int timeout
)
181 struct relayd_pending_route
*rt
;
182 struct relayd_interface
*rif
;
183 struct relayd_host
*host
;
185 host
= find_host_by_ipaddr(NULL
, gateway
);
187 relayd_add_host_route(host
, dest
, mask
);
191 rt
= calloc(1, sizeof(*rt
));
195 memcpy(rt
->gateway
, gateway
, sizeof(rt
->gateway
));
196 memcpy(rt
->rt
.dest
, dest
, sizeof(rt
->rt
.dest
));
198 list_add(&rt
->rt
.list
, &pending_routes
);
202 rt
->timeout
.cb
= timeout_host_route
;
203 uloop_timeout_set(&rt
->timeout
, 10000);
204 list_for_each_entry(rif
, &interfaces
, list
) {
205 send_arp_request(rif
, gateway
);
209 static void send_arp_reply(struct relayd_interface
*rif
, const uint8_t spa
[4],
210 const uint8_t tha
[ETH_ALEN
], const uint8_t tpa
[4])
212 struct arp_packet pkt
;
214 fill_arp_packet(&pkt
, rif
, spa
, tpa
);
216 pkt
.arp
.arp_op
= htons(ARPOP_REPLY
);
218 memcpy(pkt
.eth
.ether_dhost
, tha
, ETH_ALEN
);
219 memcpy(pkt
.arp
.arp_tha
, tha
, ETH_ALEN
);
221 DPRINTF(2, "%s: sending ARP reply to "IP_FMT
", "IP_FMT
" is at ("MAC_FMT
")\n",
222 rif
->ifname
, IP_BUF(pkt
.arp
.arp_tpa
),
223 IP_BUF(pkt
.arp
.arp_spa
), MAC_BUF(pkt
.eth
.ether_shost
));
225 memset(pkt
.eth
.ether_dhost
, 0xff, ETH_ALEN
);
226 memset(pkt
.arp
.arp_tha
, 0, ETH_ALEN
);
228 DPRINTF(2, "%s: sending gratuitous ARP: "IP_FMT
" is at ("MAC_FMT
")\n",
229 rif
->ifname
, IP_BUF(pkt
.arp
.arp_tpa
),
230 MAC_BUF(pkt
.eth
.ether_shost
));
233 sendto(rif
->fd
.fd
, &pkt
, sizeof(pkt
), 0,
234 (struct sockaddr
*) &rif
->sll
, sizeof(rif
->sll
));
237 static void host_entry_timeout(struct uloop_timeout
*timeout
)
239 struct relayd_host
*host
= container_of(timeout
, struct relayd_host
, timeout
);
242 * When a host is behind a managed interface, we must not expire its host
243 * entry prematurely, as this will cause routes to the node to expire,
244 * leading to loss of connectivity from the other side.
245 * When the timeout is reached, try pinging the host a few times before
248 if (host
->rif
->managed
&& host
->cleanup_pending
< host_ping_tries
) {
249 send_arp_request(host
->rif
, host
->ipaddr
);
250 host
->cleanup_pending
++;
251 uloop_timeout_set(&host
->timeout
, 1000);
257 static struct relayd_host
*add_host(struct relayd_interface
*rif
, const uint8_t *lladdr
, const uint8_t *ipaddr
)
259 struct relayd_host
*host
;
260 struct relayd_pending_route
*route
, *rtmp
;
262 DPRINTF(1, "%s: adding host "IP_FMT
" ("MAC_FMT
")\n", rif
->ifname
,
263 IP_BUF(ipaddr
), MAC_BUF(lladdr
));
265 host
= calloc(1, sizeof(*host
));
266 INIT_LIST_HEAD(&host
->routes
);
268 memcpy(host
->ipaddr
, ipaddr
, sizeof(host
->ipaddr
));
269 memcpy(host
->lladdr
, lladdr
, sizeof(host
->lladdr
));
270 list_add(&host
->list
, &rif
->hosts
);
271 host
->timeout
.cb
= host_entry_timeout
;
272 uloop_timeout_set(&host
->timeout
, host_timeout
* 1000);
276 relayd_add_route(host
, NULL
);
278 list_for_each_entry_safe(route
, rtmp
, &pending_routes
, rt
.list
) {
279 if (memcmp(route
->gateway
, ipaddr
, 4) != 0)
282 relayd_add_host_route(host
, route
->rt
.dest
, route
->rt
.mask
);
283 if (!route
->timeout
.pending
)
286 uloop_timeout_cancel(&route
->timeout
);
287 list_del(&route
->rt
.list
);
294 static void send_gratuitous_arp(struct relayd_interface
*rif
, const uint8_t *spa
)
296 struct relayd_interface
*to_rif
;
298 list_for_each_entry(to_rif
, &interfaces
, list
) {
302 send_arp_reply(to_rif
, spa
, NULL
, spa
);
307 struct relayd_host
*relayd_refresh_host(struct relayd_interface
*rif
, const uint8_t *lladdr
, const uint8_t *ipaddr
)
309 struct relayd_host
*host
;
311 host
= find_host_by_ipaddr(rif
, ipaddr
);
313 host
= find_host_by_ipaddr(NULL
, ipaddr
);
316 * When we suddenly see the host appearing on a different interface,
317 * reduce the timeout to make the old entry expire faster, in case the
319 * If the old entry is behind a managed interface, it will be pinged
320 * before we expire it
322 if (host
&& !host
->cleanup_pending
) {
323 uloop_timeout_set(&host
->timeout
, 1);
327 host
= add_host(rif
, lladdr
, ipaddr
);
329 host
->cleanup_pending
= false;
330 uloop_timeout_set(&host
->timeout
, host_timeout
* 1000);
331 send_gratuitous_arp(rif
, ipaddr
);
337 static void relay_arp_request(struct relayd_interface
*from_rif
, struct arp_packet
*pkt
)
339 struct relayd_interface
*rif
;
340 struct arp_packet reqpkt
;
342 memcpy(&reqpkt
, pkt
, sizeof(reqpkt
));
343 list_for_each_entry(rif
, &interfaces
, list
) {
347 memcpy(reqpkt
.eth
.ether_shost
, rif
->sll
.sll_addr
, ETH_ALEN
);
348 memcpy(reqpkt
.arp
.arp_sha
, rif
->sll
.sll_addr
, ETH_ALEN
);
350 DPRINTF(2, "%s: sending ARP who-has "IP_FMT
", tell "IP_FMT
" ("MAC_FMT
")\n",
351 rif
->ifname
, IP_BUF(reqpkt
.arp
.arp_tpa
),
352 IP_BUF(reqpkt
.arp
.arp_spa
), MAC_BUF(reqpkt
.eth
.ether_shost
));
354 sendto(rif
->fd
.fd
, &reqpkt
, sizeof(reqpkt
), 0,
355 (struct sockaddr
*) &rif
->sll
, sizeof(rif
->sll
));
359 static void recv_arp_request(struct relayd_interface
*rif
, struct arp_packet
*pkt
)
361 struct relayd_host
*host
;
363 DPRINTF(2, "%s: ARP who-has "IP_FMT
", tell "IP_FMT
" ("MAC_FMT
")\n",
365 IP_BUF(pkt
->arp
.arp_tpa
),
366 IP_BUF(pkt
->arp
.arp_spa
),
367 MAC_BUF(pkt
->eth
.ether_shost
));
369 if (!memcmp(pkt
->arp
.arp_spa
, "\x00\x00\x00\x00", 4))
372 if (local_route_table
&& !memcmp(pkt
->arp
.arp_tpa
, local_addr
, sizeof(local_addr
))) {
373 send_arp_reply(rif
, local_addr
, pkt
->arp
.arp_sha
, pkt
->arp
.arp_spa
);
377 host
= find_host_by_ipaddr(NULL
, pkt
->arp
.arp_spa
);
378 if (!host
|| host
->rif
!= rif
)
379 relayd_refresh_host(rif
, pkt
->eth
.ether_shost
, pkt
->arp
.arp_spa
);
381 host
= find_host_by_ipaddr(NULL
, pkt
->arp
.arp_tpa
);
384 * If a host is being pinged because of a timeout, do not use the cached
385 * entry here. That way we can avoid giving out stale data in case the node
386 * has moved. We shouldn't relay requests here either, as we might miss our
387 * chance to create a host route.
389 if (host
&& host
->cleanup_pending
)
392 relay_arp_request(rif
, pkt
);
395 static void recv_arp_reply(struct relayd_interface
*rif
, struct arp_packet
*pkt
)
397 struct relayd_host
*host
;
399 DPRINTF(2, "%s: received ARP reply for "IP_FMT
" from "MAC_FMT
", deliver to "IP_FMT
"\n",
401 IP_BUF(pkt
->arp
.arp_spa
),
402 MAC_BUF(pkt
->eth
.ether_shost
),
403 IP_BUF(pkt
->arp
.arp_tpa
));
405 if (memcmp(pkt
->arp
.arp_sha
, rif
->sll
.sll_addr
, ETH_ALEN
) != 0)
406 relayd_refresh_host(rif
, pkt
->arp
.arp_sha
, pkt
->arp
.arp_spa
);
408 host
= find_host_by_ipaddr(NULL
, pkt
->arp
.arp_tpa
);
412 if (host
->rif
== rif
)
415 send_arp_reply(host
->rif
, pkt
->arp
.arp_spa
, host
->lladdr
, host
->ipaddr
);
418 static void recv_packet(struct uloop_fd
*fd
, unsigned int events
)
420 struct relayd_interface
*rif
= container_of(fd
, struct relayd_interface
, fd
);
421 struct arp_packet
*pkt
;
422 static char pktbuf
[4096];
429 pktlen
= recv(rif
->fd
.fd
, pktbuf
, sizeof(pktbuf
), 0);
440 pkt
= (void *)pktbuf
;
441 if (pkt
->arp
.arp_op
== htons(ARPOP_REPLY
))
442 recv_arp_reply(rif
, pkt
);
443 else if (pkt
->arp
.arp_op
== htons(ARPOP_REQUEST
))
444 recv_arp_request(rif
, pkt
);
446 DPRINTF(1, "received unknown packet type: %04x\n", ntohs(pkt
->arp
.arp_op
));
451 void relayd_forward_bcast_packet(struct relayd_interface
*from_rif
, void *packet
, int len
)
453 struct relayd_interface
*rif
;
454 struct ether_header
*eth
= packet
;
456 list_for_each_entry(rif
, &interfaces
, list
) {
460 DPRINTF(3, "%s: forwarding broadcast packet to %s\n", from_rif
->ifname
, rif
->ifname
);
461 memcpy(eth
->ether_shost
, rif
->sll
.sll_addr
, ETH_ALEN
);
462 send(rif
->bcast_fd
.fd
, packet
, len
, 0);
466 static void recv_bcast_packet(struct uloop_fd
*fd
, unsigned int events
)
468 struct relayd_interface
*rif
= container_of(fd
, struct relayd_interface
, bcast_fd
);
469 static char pktbuf
[4096];
476 pktlen
= recv(rif
->bcast_fd
.fd
, pktbuf
, sizeof(pktbuf
), 0);
487 if (!forward_bcast
&& !forward_dhcp
)
490 if (relayd_handle_dhcp_packet(rif
, pktbuf
, pktlen
, forward_dhcp
))
494 relayd_forward_bcast_packet(rif
, pktbuf
, pktlen
);
499 static int init_interface(struct relayd_interface
*rif
)
501 struct sockaddr_ll
*sll
= &rif
->sll
;
502 struct sockaddr_in
*sin
;
505 #ifdef PACKET_RECV_TYPE
506 unsigned int pkt_type
;
509 fd
= socket(AF_PACKET
, SOCK_RAW
, htons(ETH_P_ARP
));
515 memset(&ifr
, 0, sizeof(ifr
));
516 strcpy(ifr
.ifr_name
, rif
->ifname
);
518 if (ioctl(fd
, SIOCGIFHWADDR
, &ifr
) < 0) {
519 perror("ioctl(SIOCGIFHWADDR)");
523 memcpy(sll
->sll_addr
, ifr
.ifr_hwaddr
.sa_data
, ETH_ALEN
);
524 sll
->sll_family
= AF_PACKET
;
525 sll
->sll_protocol
= htons(ETH_P_ARP
);
526 sll
->sll_pkttype
= PACKET_BROADCAST
;
527 sll
->sll_hatype
= ARPHRD_ETHER
;
528 sll
->sll_halen
= ETH_ALEN
;
530 if (ioctl(fd
, SIOCGIFINDEX
, &ifr
) < 0) {
531 perror("ioctl(SIOCGIFINDEX)");
535 sll
->sll_ifindex
= ifr
.ifr_ifindex
;
537 if (ioctl(fd
, SIOCGIFADDR
, &ifr
) < 0) {
538 memcpy(rif
->src_ip
, DUMMY_IP
, sizeof(rif
->src_ip
));
540 sin
= (struct sockaddr_in
*) &ifr
.ifr_addr
;
541 memcpy(rif
->src_ip
, &sin
->sin_addr
.s_addr
, sizeof(rif
->src_ip
));
544 if (bind(fd
, (struct sockaddr
*)sll
, sizeof(struct sockaddr_ll
)) < 0) {
545 perror("bind(ETH_P_ARP)");
549 rif
->fd
.cb
= recv_packet
;
550 uloop_fd_add(&rif
->fd
, ULOOP_READ
| ULOOP_EDGE_TRIGGER
);
552 if (!forward_bcast
&& !forward_dhcp
)
555 fd
= socket(AF_PACKET
, SOCK_RAW
, htons(ETH_P_IP
));
559 rif
->bcast_fd
.fd
= fd
;
560 rif
->bcast_fd
.cb
= recv_bcast_packet
;
562 memcpy(&rif
->bcast_sll
, &rif
->sll
, sizeof(rif
->bcast_sll
));
563 sll
= &rif
->bcast_sll
;
564 sll
->sll_protocol
= htons(ETH_P_IP
);
566 if (bind(fd
, (struct sockaddr
*)sll
, sizeof(struct sockaddr_ll
)) < 0) {
567 perror("bind(ETH_P_IP)");
571 #ifdef PACKET_RECV_TYPE
572 pkt_type
= (1 << PACKET_BROADCAST
);
573 setsockopt(fd
, SOL_PACKET
, PACKET_RECV_TYPE
, &pkt_type
, sizeof(pkt_type
));
576 uloop_fd_add(&rif
->bcast_fd
, ULOOP_READ
| ULOOP_EDGE_TRIGGER
);
577 relayd_add_interface_routes(rif
);
581 static void ping_static_routes(void)
583 struct relayd_pending_route
*rt
;
584 struct relayd_interface
*rif
;
586 list_for_each_entry(rt
, &pending_routes
, rt
.list
)
587 list_for_each_entry(rif
, &interfaces
, list
)
588 send_arp_request(rif
, rt
->gateway
);
591 static int init_interfaces(void)
593 struct relayd_interface
*rif
;
596 list_for_each_entry(rif
, &interfaces
, list
) {
597 ret
= init_interface(rif
);
605 static void cleanup_hosts(void)
607 struct relayd_interface
*rif
;
608 struct relayd_host
*host
, *tmp
;
610 list_for_each_entry(rif
, &interfaces
, list
) {
611 list_for_each_entry_safe(host
, tmp
, &rif
->hosts
, list
) {
617 static void free_interfaces(void)
619 struct relayd_interface
*rif
, *rtmp
;
621 list_for_each_entry_safe(rif
, rtmp
, &interfaces
, list
) {
622 relayd_del_interface_routes(rif
);
623 list_del(&rif
->list
);
628 static struct relayd_interface
*alloc_interface(const char *ifname
, bool managed
)
630 struct relayd_interface
*rif
;
632 if (strlen(ifname
) >= IFNAMSIZ
)
635 rif
= calloc(1, sizeof(*rif
));
639 INIT_LIST_HEAD(&rif
->hosts
);
640 strcpy(rif
->ifname
, ifname
);
641 list_add(&rif
->list
, &interfaces
);
642 rif
->managed
= managed
;
647 static void die(int signo
)
650 * When we hit SIGTERM, clean up interfaces directly, so that we
651 * won't leave our routing in an invalid state.
658 static int usage(const char *progname
)
660 fprintf(stderr
, "Usage: %s <options>\n"
663 " -d Enable debug messages\n"
664 " -i <ifname> Add an interface for relaying\n"
665 " -I <ifname> Same as -i, except with ARP cache and host route management\n"
666 " You need to specify at least two interfaces\n"
667 " -G <ip> Set a gateway IP for clients\n"
668 " -R <gateway>:<net>/<mask>\n"
669 " Add a static route for <net>/<mask> via <gateway>\n"
670 " -t <timeout> Host entry expiry timeout\n"
671 " -p <tries> Number of ARP ping attempts before considering a host dead\n"
672 " -T <table> Set routing table number for automatically added routes\n"
673 " -B Enable broadcast forwarding\n"
674 " -D Enable DHCP forwarding\n"
675 " -L <ipaddr> Enable local access using <ipaddr> as source address\n"
681 int main(int argc
, char **argv
)
683 struct relayd_interface
*rif
= NULL
;
684 struct in_addr addr
, addr2
;
685 bool local_addr_valid
= false;
693 inet_sock
= socket(AF_INET
, SOCK_DGRAM
, 0);
695 perror("socket(AF_INET)");
702 local_route_table
= 0;
705 while ((ch
= getopt(argc
, argv
, "I:i:t:BDdT:G:R:L:")) != -1) {
712 rif
= alloc_interface(optarg
, managed
);
719 host_timeout
= atoi(optarg
);
720 if (host_timeout
<= 0)
721 return usage(argv
[0]);
724 host_ping_tries
= atoi(optarg
);
725 if (host_ping_tries
<= 0)
726 return usage(argv
[0]);
738 route_table
= atoi(optarg
);
739 if (route_table
<= 0)
740 return usage(argv
[0]);
743 if (!inet_aton(optarg
, &addr
)) {
744 fprintf(stderr
, "Address '%s' not found\n", optarg
);
747 relayd_add_pending_route((uint8_t *) &addr
.s_addr
, (const uint8_t *) "\x00\x00\x00\x00", 0, 0);
750 if (!inet_aton(optarg
, &addr
)) {
751 fprintf(stderr
, "Address '%s' not found\n", optarg
);
754 memcpy(&local_addr
, &addr
.s_addr
, sizeof(local_addr
));
755 local_addr_valid
= true;
758 s
= strchr(optarg
, ':');
760 return usage(argv
[0]);
763 if (!inet_aton(optarg
, &addr
)) {
764 fprintf(stderr
, "Address '%s' not found\n", optarg
);
770 return usage(argv
[0]);
773 if (!inet_aton(s
, &addr2
)) {
774 fprintf(stderr
, "Address '%s' not found\n", s
);
779 if (mask
< 0 || mask
> 32)
780 return usage(argv
[0]);
782 relayd_add_pending_route((uint8_t *) &addr
.s_addr
, (uint8_t *) &addr2
.s_addr
, mask
, 0);
786 return usage(argv
[0]);
790 if (list_empty(&interfaces
))
791 return usage(argv
[0]);
794 fprintf(stderr
, "ERROR: Need at least 2 interfaces for relaying\n");
801 signal(SIGTERM
, die
);
803 signal(SIGUSR1
, die
);
804 signal(SIGUSR2
, die
);
806 if (local_addr_valid
)
807 local_route_table
= route_table
++;
809 if (relayd_rtnl_init() < 0)
812 if (init_interfaces() < 0)
815 ping_static_routes();