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b4216e2c66
Same as previous commit -- convert most DEFINE_MTYPE into the _STATIC variant, and move the remaining non-static ones to appropriate places. Signed-off-by: David Lamparter <equinox@diac24.net>
159 lines
4.3 KiB
C
159 lines
4.3 KiB
C
/*
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* EIGRP Sending and Receiving EIGRP SIA-Query Packets.
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* Copyright (C) 2013-2014
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* Authors:
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* Donnie Savage
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* Jan Janovic
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* Matej Perina
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* Peter Orsag
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* Peter Paluch
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*
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* This file is part of GNU Zebra.
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*
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* GNU Zebra is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* GNU Zebra is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; see the file COPYING; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <zebra.h>
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#include "thread.h"
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#include "memory.h"
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#include "linklist.h"
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#include "prefix.h"
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#include "if.h"
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#include "table.h"
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#include "sockunion.h"
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#include "stream.h"
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#include "log.h"
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#include "sockopt.h"
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#include "checksum.h"
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#include "md5.h"
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#include "vty.h"
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#include "eigrpd/eigrp_structs.h"
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#include "eigrpd/eigrpd.h"
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#include "eigrpd/eigrp_interface.h"
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#include "eigrpd/eigrp_neighbor.h"
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#include "eigrpd/eigrp_packet.h"
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#include "eigrpd/eigrp_zebra.h"
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#include "eigrpd/eigrp_vty.h"
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#include "eigrpd/eigrp_dump.h"
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#include "eigrpd/eigrp_macros.h"
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#include "eigrpd/eigrp_topology.h"
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#include "eigrpd/eigrp_fsm.h"
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/*EIGRP SIA-QUERY read function*/
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void eigrp_siaquery_receive(struct eigrp *eigrp, struct ip *iph,
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struct eigrp_header *eigrph, struct stream *s,
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struct eigrp_interface *ei, int size)
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{
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struct eigrp_neighbor *nbr;
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struct TLV_IPv4_Internal_type *tlv;
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uint16_t type;
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/* increment statistics. */
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ei->siaQuery_in++;
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/* get neighbor struct */
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nbr = eigrp_nbr_get(ei, eigrph, iph);
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/* neighbor must be valid, eigrp_nbr_get creates if none existed */
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assert(nbr);
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nbr->recv_sequence_number = ntohl(eigrph->sequence);
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while (s->endp > s->getp) {
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type = stream_getw(s);
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if (type == EIGRP_TLV_IPv4_INT) {
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struct prefix dest_addr;
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stream_set_getp(s, s->getp - sizeof(uint16_t));
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tlv = eigrp_read_ipv4_tlv(s);
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dest_addr.family = AFI_IP;
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dest_addr.u.prefix4 = tlv->destination;
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dest_addr.prefixlen = tlv->prefix_length;
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struct eigrp_prefix_descriptor *dest =
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eigrp_topology_table_lookup_ipv4(
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eigrp->topology_table, &dest_addr);
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/* If the destination exists (it should, but one never
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* know)*/
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if (dest != NULL) {
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struct eigrp_fsm_action_message msg;
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struct eigrp_route_descriptor *entry =
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eigrp_route_descriptor_lookup(
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dest->entries, nbr);
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msg.packet_type = EIGRP_OPC_SIAQUERY;
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msg.eigrp = eigrp;
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msg.data_type = EIGRP_INT;
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msg.adv_router = nbr;
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msg.metrics = tlv->metric;
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msg.entry = entry;
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msg.prefix = dest;
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eigrp_fsm_event(&msg);
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}
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eigrp_IPv4_InternalTLV_free(tlv);
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}
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}
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eigrp_hello_send_ack(nbr);
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}
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void eigrp_send_siaquery(struct eigrp_neighbor *nbr,
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struct eigrp_prefix_descriptor *pe)
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{
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struct eigrp_packet *ep;
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uint16_t length = EIGRP_HEADER_LEN;
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ep = eigrp_packet_new(EIGRP_PACKET_MTU(nbr->ei->ifp->mtu), nbr);
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/* Prepare EIGRP INIT UPDATE header */
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eigrp_packet_header_init(EIGRP_OPC_SIAQUERY, nbr->ei->eigrp, ep->s, 0,
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nbr->ei->eigrp->sequence_number, 0);
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// encode Authentication TLV, if needed
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if ((nbr->ei->params.auth_type == EIGRP_AUTH_TYPE_MD5)
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&& (nbr->ei->params.auth_keychain != NULL)) {
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length += eigrp_add_authTLV_MD5_to_stream(ep->s, nbr->ei);
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}
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length += eigrp_add_internalTLV_to_stream(ep->s, pe);
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if ((nbr->ei->params.auth_type == EIGRP_AUTH_TYPE_MD5)
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&& (nbr->ei->params.auth_keychain != NULL)) {
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eigrp_make_md5_digest(nbr->ei, ep->s, EIGRP_AUTH_UPDATE_FLAG);
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}
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/* EIGRP Checksum */
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eigrp_packet_checksum(nbr->ei, ep->s, length);
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ep->length = length;
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ep->dst.s_addr = nbr->src.s_addr;
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/*This ack number we await from neighbor*/
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ep->sequence_number = nbr->ei->eigrp->sequence_number;
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if (nbr->state == EIGRP_NEIGHBOR_UP) {
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/*Put packet to retransmission queue*/
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eigrp_fifo_push(nbr->retrans_queue, ep);
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if (nbr->retrans_queue->count == 1) {
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eigrp_send_packet_reliably(nbr);
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}
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} else
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eigrp_packet_free(ep);
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}
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