1 /* $OpenBSD: nbrs2.c,v 1.4 2015/05/05 01:26:37 jsg 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 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 struct dvmrp_hdr *dvmrp_hdr; 41 int ret = 0; 42 43 log_debug("send_nbrs2: interface %s addr %s", 44 iface->name, inet_ntoa(addr)); 45 46 if (iface->passive) 47 return (0); 48 49 if ((buf = ibuf_open(iface->mtu - sizeof(struct ip))) == NULL) 50 fatal("send_nbrs2"); 51 52 /* DVMRP header */ 53 if (gen_dvmrp_hdr(buf, iface, DVMRP_CODE_GRAFT_ACK)) 54 goto fail; 55 56 dst.sin_family = AF_INET; 57 dst.sin_len = sizeof(struct sockaddr_in); 58 dst.sin_addr.s_addr = addr.s_addr; 59 60 /* update chksum */ 61 dvmrp_hdr = ibuf_seek(buf, 0, sizeof(*dvmrp_hdr)); 62 dvmrp_hdr->chksum = in_cksum(buf->buf, buf->wpos); 63 64 ret = send_packet(iface, buf->buf, buf->wpos, &dst); 65 ibuf_free(buf); 66 return (ret); 67 fail: 68 log_warn("send_nbrs2"); 69 ibuf_free(buf); 70 return (-1); 71 } 72 73 void 74 recv_nbrs2(struct nbr *nbr, char *buf, u_int16_t len) 75 { 76 log_debug("recv_nbrs2: neighbor ID %s", inet_ntoa(nbr->id)); 77 78 return; 79 } 80