GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/dvmrpd/prune.c Lines: 0 42 0.0 %
Date: 2017-11-13 Branches: 0 10 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: prune.c,v 1.6 2015/12/07 19:14:49 mmcc Exp $ */
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/*
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 * Copyright (c) 2005, 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 <string.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 prune packet handling */
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int
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send_prune(struct nbr *nbr, struct prune *p)
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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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	struct prune_hdr	 prune;
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	int			 ret = 0;
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	log_debug("send_prune: interface %s nbr %s", nbr->iface->name,
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	    inet_ntoa(nbr->addr));
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	if (nbr->iface->passive)
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		return (0);
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	memset(&prune, 0, sizeof(prune));
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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 = nbr->addr;
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	if ((buf = ibuf_open(nbr->iface->mtu - sizeof(struct ip))) == NULL)
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		fatal("send_prune");
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	/* DVMRP header */
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	if (gen_dvmrp_hdr(buf, nbr->iface, DVMRP_CODE_PRUNE))
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		goto fail;
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	prune.src_host_addr = p->origin.s_addr;
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	prune.group_addr = p->group.s_addr;
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	/* XXX */
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	prune.lifetime = htonl(MAX_PRUNE_LIFETIME);
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	prune.src_netmask = p->netmask.s_addr;
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	ibuf_add(buf, &prune, sizeof(prune));
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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(nbr->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_prune");
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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_prune(struct nbr *nbr, char *buf, u_int16_t len)
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{
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	struct prune		 p;
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	struct prune_hdr	*prune;
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	log_debug("recv_prune: neighbor ID %s", inet_ntoa(nbr->id));
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	if (len < PRUNE_MIN_LEN) {
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		log_debug("recv_prune: packet malformed from %s",
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		    inet_ntoa(nbr->id));
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		return;
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	}
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	memset(&p, 0, sizeof(p));
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	prune = (struct prune_hdr *)buf;
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	p.origin.s_addr = prune->src_host_addr;
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	p.group.s_addr = prune->group_addr;
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	p.lifetime = prune->lifetime;
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	if (len >= sizeof(*prune))
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		p.netmask.s_addr = prune->src_netmask;
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	p.ifindex = nbr->iface->ifindex;
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	dvmrpe_imsg_compose_rde(IMSG_RECV_PRUNE, nbr->peerid, 0, &p, sizeof(p));
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	return;
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}