GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/dvmrpd/probe.c Lines: 0 48 0.0 %
Date: 2017-11-13 Branches: 0 30 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: probe.c,v 1.4 2015/05/05 01:26:37 jsg 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 <arpa/inet.h>
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#include <sys/time.h>
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#include <stdlib.h>
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#include <string.h>
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#include <event.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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extern struct dvmrpd_conf	*deconf;
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/* DVMRP probe packet handling */
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int
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send_probe(struct iface *iface)
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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 nbr		*nbr;
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	int			 ret = 0;
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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_probe");
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	/* DVMRP header */
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	if (gen_dvmrp_hdr(buf, iface, DVMRP_CODE_PROBE))
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		goto fail;
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	/* generation ID */
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	ibuf_add(buf, &iface->gen_id, sizeof(iface->gen_id));
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	/* generate neighbor list */
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	LIST_FOREACH(nbr, &iface->nbr_list, entry) {
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		if (nbr->state > NBR_STA_DOWN)
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			ibuf_add(buf, &nbr->id, sizeof(nbr->id));
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	}
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	/* set destination address */
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	dst.sin_family = AF_INET;
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	dst.sin_len = sizeof(struct sockaddr_in);
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	inet_aton(AllDVMRPRouters, &dst.sin_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_probe");
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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_probe(struct iface *iface, struct in_addr src, u_int32_t src_ip,
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    u_int8_t capabilities, char *buf, u_int16_t len)
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{
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	struct nbr	*nbr = NULL;
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	u_int32_t	 gen_id;
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	u_int32_t	 nbr_id;
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	LIST_FOREACH(nbr, &iface->nbr_list, entry) {
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		if (nbr->id.s_addr == src_ip)
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			break;
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	}
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	memcpy(&gen_id, buf, sizeof(gen_id));
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	len -= sizeof(gen_id);
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	buf += sizeof(gen_id);
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	if (!nbr) {
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		nbr = nbr_new(src_ip, iface, 0);
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		nbr->gen_id = gen_id;
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		nbr->capabilities = capabilities;
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		nbr->addr = src;
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	}
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	nbr_fsm(nbr, NBR_EVT_PROBE_RCVD);
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	if ((nbr->gen_id != gen_id) || (nbr->capabilities != capabilities)) {
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		if (!nbr->compat)
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			nbr_fsm(nbr, NBR_EVT_1_WAY_RCVD);
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		nbr->gen_id = gen_id;
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		nbr->capabilities = capabilities;
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		/* XXX handle nbr change! */
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	}
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	while (len >= sizeof(nbr_id)) {
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		memcpy(&nbr_id, buf, sizeof(nbr_id));
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		if (nbr_id == iface->addr.s_addr) {
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			/* seen myself */
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			if (nbr->state < NBR_STA_2_WAY)
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			nbr_fsm(nbr, NBR_EVT_2_WAY_RCVD);
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			break;
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		}
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		buf += sizeof(nbr_id);
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		len -= sizeof(nbr_id);
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	}
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	if (len == 0) {
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		nbr_fsm(nbr, NBR_EVT_1_WAY_RCVD);
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		return;
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	}
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	/* XXX len correct?? */
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	return;
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}