GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/eigrpd/reply.c Lines: 0 36 0.0 %
Date: 2017-11-13 Branches: 0 29 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: reply.c,v 1.5 2016/09/02 16:46:29 renato Exp $ */
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/*
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 * Copyright (c) 2015 Renato Westphal <renato@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 <netinet/in.h>
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#include <netinet/ip.h>
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#include <netinet/ip6.h>
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#include <stdlib.h>
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#include "eigrpd.h"
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#include "eigrpe.h"
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#include "log.h"
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/* reply packet handling */
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void
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send_reply(struct nbr *nbr, struct rinfo_head *rinfo_list, int siareply)
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{
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	struct eigrp		*eigrp = nbr->ei->eigrp;
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	struct ibuf		*buf;
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	uint16_t		 opcode;
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	struct rinfo_entry	*re;
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	int			 size;
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	int			 route_len;
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	if (rinfo_list == NULL || TAILQ_EMPTY(rinfo_list))
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		return;
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	do {
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		if ((buf = ibuf_dynamic(PKG_DEF_SIZE,
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		    IP_MAXPACKET - sizeof(struct ip))) == NULL)
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			fatal("send_reply");
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		if (!siareply)
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			 opcode = EIGRP_OPC_REPLY;
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		else
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			 opcode = EIGRP_OPC_SIAREPLY;
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		/* EIGRP header */
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		if (gen_eigrp_hdr(buf, opcode, 0, eigrp->seq_num, eigrp->as))
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			goto fail;
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		switch (eigrp->af) {
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		case AF_INET:
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			size = sizeof(struct ip);
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			break;
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		case AF_INET6:
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			size = sizeof(struct ip6_hdr);
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			break;
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		default:
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			fatalx("send_reply: unknown af");
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		}
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		size += sizeof(struct eigrp_hdr);
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		while ((re = TAILQ_FIRST(rinfo_list)) != NULL) {
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			route_len = len_route_tlv(&re->rinfo);
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			/* don't exceed the MTU to avoid IP fragmentation */
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			if (size + route_len > nbr->ei->iface->mtu) {
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				rtp_send_ucast(nbr, buf);
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				break;
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			}
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			size += route_len;
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			if (gen_route_tlv(buf, &re->rinfo))
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				goto fail;
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			TAILQ_REMOVE(rinfo_list, re, entry);
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			free(re);
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		}
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	} while (!TAILQ_EMPTY(rinfo_list));
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	/* reply packets are always unicast */
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	rtp_send_ucast(nbr, buf);
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	return;
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fail:
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	log_warnx("%s: failed to send message", __func__);
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	if (rinfo_list)
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		message_list_clr(rinfo_list);
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	ibuf_free(buf);
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	return;
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}
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void
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recv_reply(struct nbr *nbr, struct rinfo_head *rinfo_list, int siareply)
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{
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	int			 type;
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	struct rinfo_entry	*re;
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	/*
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	 * draft-savage-eigrp-02 - Section 4.3:
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	 * "When a REPLY packet is received, there is no reason to process
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	 * the packet before an acknowledgment is sent. Therefore, an Ack
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	 * packet is sent immediately and then the packet is processed."
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	 */
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	rtp_send_ack(nbr);
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	if (!siareply)
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		type = IMSG_RECV_REPLY;
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	else
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		type = IMSG_RECV_SIAREPLY;
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	TAILQ_FOREACH(re, rinfo_list, entry)
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		eigrpe_imsg_compose_rde(type, nbr->peerid, 0, &re->rinfo,
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		    sizeof(re->rinfo));
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}