1 /* $OpenBSD: ask_nbrs2.c,v 1.6 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
27 #include "igmp.h"
28 #include "dvmrpd.h"
29 #include "dvmrp.h"
30 #include "log.h"
31 #include "dvmrpe.h"
32
33 /* DVMRP ask neighbors2 packet handling */
34 int
send_ask_nbrs2(struct iface * iface,struct in_addr addr,void * data,int len)35 send_ask_nbrs2(struct iface *iface, struct in_addr addr, void *data, int len)
36 {
37 struct sockaddr_in dst;
38 struct ibuf *buf;
39 int ret = 0;
40
41 log_debug("send_ask_nbrs2: interface %s addr %s",
42 iface->name, inet_ntoa(addr));
43
44 if (iface->passive)
45 return (0);
46
47 if ((buf = ibuf_open(iface->mtu - sizeof(struct ip))) == NULL)
48 fatal("send_ask_nbrs2");
49
50 /* DVMRP header */
51 if (gen_dvmrp_hdr(buf, iface, DVMRP_CODE_GRAFT_ACK))
52 goto fail;
53
54 dst.sin_family = AF_INET;
55 dst.sin_len = sizeof(struct sockaddr_in);
56 dst.sin_addr.s_addr = addr.s_addr;
57
58 ret = send_packet(iface, buf, &dst);
59 ibuf_free(buf);
60 return (ret);
61 fail:
62 log_warn("send_ask_nbrs2");
63 ibuf_free(buf);
64 return (-1);
65 }
66
67 void
recv_ask_nbrs2(struct nbr * nbr,char * buf,u_int16_t len)68 recv_ask_nbrs2(struct nbr *nbr, char *buf, u_int16_t len)
69 {
70 log_debug("recv_ask_nbrs2: neighbor ID %s", inet_ntoa(nbr->id));
71
72 return;
73 }
74