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