1 /* $OpenBSD: nbrs2.c,v 1.5 2023/06/26 10:08:56 claudio Exp $ */
2
3 /*
4 * Copyright (c) 2006 Esben Norby <norby@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/types.h>
20 #include <sys/socket.h>
21 #include <netinet/in.h>
22 #include <netinet/ip.h>
23 #include <arpa/inet.h>
24
25 #include <stdlib.h>
26 #include <strings.h>
27
28 #include "igmp.h"
29 #include "dvmrpd.h"
30 #include "dvmrp.h"
31 #include "log.h"
32 #include "dvmrpe.h"
33
34 /* DVMRP neighbors2 packet handling */
35 int
send_nbrs2(struct iface * iface,struct in_addr addr,void * data,int len)36 send_nbrs2(struct iface *iface, struct in_addr addr, void *data, int len)
37 {
38 struct sockaddr_in dst;
39 struct ibuf *buf;
40 int ret = 0;
41
42 log_debug("send_nbrs2: interface %s addr %s",
43 iface->name, inet_ntoa(addr));
44
45 if (iface->passive)
46 return (0);
47
48 if ((buf = ibuf_open(iface->mtu - sizeof(struct ip))) == NULL)
49 fatal("send_nbrs2");
50
51 /* DVMRP header */
52 if (gen_dvmrp_hdr(buf, iface, DVMRP_CODE_GRAFT_ACK))
53 goto fail;
54
55 dst.sin_family = AF_INET;
56 dst.sin_len = sizeof(struct sockaddr_in);
57 dst.sin_addr.s_addr = addr.s_addr;
58
59 ret = send_packet(iface, buf, &dst);
60 ibuf_free(buf);
61 return (ret);
62 fail:
63 log_warn("send_nbrs2");
64 ibuf_free(buf);
65 return (-1);
66 }
67
68 void
recv_nbrs2(struct nbr * nbr,char * buf,u_int16_t len)69 recv_nbrs2(struct nbr *nbr, char *buf, u_int16_t len)
70 {
71 log_debug("recv_nbrs2: neighbor ID %s", inet_ntoa(nbr->id));
72
73 return;
74 }
75