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/* $OpenBSD: graft_ack.c,v 1.5 2015/12/07 19:17:18 mmcc Exp $ */ |
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/* |
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* Copyright (c) 2006 Esben Norby <norby@openbsd.org> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <sys/types.h> |
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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#include <netinet/ip.h> |
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#include <arpa/inet.h> |
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#include <stdlib.h> |
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#include "igmp.h" |
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#include "dvmrpd.h" |
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#include "dvmrp.h" |
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#include "log.h" |
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#include "dvmrpe.h" |
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/* DVMRP graft ack packet handling */ |
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int |
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send_graft_ack(struct iface *iface, struct in_addr addr, void *data, int len) |
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{ |
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struct sockaddr_in dst; |
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struct ibuf *buf; |
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struct dvmrp_hdr *dvmrp_hdr; |
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int ret = 0; |
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log_debug("send_graft_ack: interface %s addr %s", |
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iface->name, inet_ntoa(addr)); |
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if (iface->passive) |
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return (0); |
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if ((buf = ibuf_open(iface->mtu - sizeof(struct ip))) == NULL) |
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fatal("send_graft_ack"); |
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/* DVMRP header */ |
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if (gen_dvmrp_hdr(buf, iface, DVMRP_CODE_GRAFT_ACK)) |
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goto fail; |
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dst.sin_family = AF_INET; |
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dst.sin_len = sizeof(struct sockaddr_in); |
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dst.sin_addr.s_addr = addr.s_addr; |
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/* update chksum */ |
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dvmrp_hdr = ibuf_seek(buf, 0, sizeof(*dvmrp_hdr)); |
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dvmrp_hdr->chksum = in_cksum(buf->buf, buf->wpos); |
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ret = send_packet(iface, buf->buf, buf->wpos, &dst); |
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ibuf_free(buf); |
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return (ret); |
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fail: |
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log_warn("send_graft_ack"); |
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ibuf_free(buf); |
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return (-1); |
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} |
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void |
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recv_graft_ack(struct nbr *nbr, char *buf, u_int16_t len) |
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{ |
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log_debug("recv_graft_ack: neighbor ID %s", inet_ntoa(nbr->id)); |
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return; |
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} |