/* $OpenBSD: query.c,v 1.5 2016/09/02 16:46:29 renato Exp $ */ /* * Copyright (c) 2015 Renato Westphal <renato@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 <netinet/in.h> #include <netinet/ip.h> #include <netinet/ip6.h> #include <stdlib.h> #include "eigrpd.h" #include "eigrpe.h" #include "log.h" /* query packet handling */ void send_query(struct eigrp_iface *ei, struct nbr *nbr, struct rinfo_head *rinfo_list, int siaquery) { struct eigrp *eigrp = ei->eigrp; struct ibuf *buf; uint16_t opcode; struct rinfo_entry *re; int size; int route_len; if (rinfo_list == NULL || TAILQ_EMPTY(rinfo_list)) return; do { if ((buf = ibuf_dynamic(PKG_DEF_SIZE, IP_MAXPACKET - sizeof(struct ip))) == NULL) fatal("send_query"); if (!siaquery) opcode = EIGRP_OPC_QUERY; else opcode = EIGRP_OPC_SIAQUERY; /* EIGRP header */ if (gen_eigrp_hdr(buf, opcode, 0, eigrp->seq_num, eigrp->as)) goto fail; switch (eigrp->af) { case AF_INET: size = sizeof(struct ip); break; case AF_INET6: size = sizeof(struct ip6_hdr); break; default: fatalx("send_query: unknown af"); } size += sizeof(struct eigrp_hdr); while ((re = TAILQ_FIRST(rinfo_list)) != NULL) { route_len = len_route_tlv(&re->rinfo); /* don't exceed the MTU to avoid IP fragmentation */ if (size + route_len > ei->iface->mtu) { rtp_send(ei, nbr, buf); break; } size += route_len; if (gen_route_tlv(buf, &re->rinfo)) goto fail; TAILQ_REMOVE(rinfo_list, re, entry); free(re); } } while (!TAILQ_EMPTY(rinfo_list)); rtp_send(ei, nbr, buf); return; fail: log_warnx("%s: failed to send message", __func__); if (rinfo_list) message_list_clr(rinfo_list); ibuf_free(buf); return; } void recv_query(struct nbr *nbr, struct rinfo_head *rinfo_list, int siaquery) { int type; struct rinfo_entry *re; rtp_ack_start_timer(nbr); if (!siaquery) type = IMSG_RECV_QUERY; else type = IMSG_RECV_SIAQUERY; TAILQ_FOREACH(re, rinfo_list, entry) eigrpe_imsg_compose_rde(type, nbr->peerid, 0, &re->rinfo, sizeof(re->rinfo)); }