115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
/* $OpenBSD: query.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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/* query packet handling */
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void
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send_query(struct eigrp_iface *ei, struct nbr *nbr,
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struct rinfo_head *rinfo_list, int siaquery)
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{
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struct eigrp *eigrp = 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_query");
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if (!siaquery)
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opcode = EIGRP_OPC_QUERY;
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else
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opcode = EIGRP_OPC_SIAQUERY;
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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_query: 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 > ei->iface->mtu) {
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rtp_send(ei, 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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rtp_send(ei, 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_query(struct nbr *nbr, struct rinfo_head *rinfo_list, int siaquery)
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{
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int type;
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struct rinfo_entry *re;
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rtp_ack_start_timer(nbr);
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if (!siaquery)
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type = IMSG_RECV_QUERY;
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else
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type = IMSG_RECV_SIAQUERY;
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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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}
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