From 718e3744195351130f4ce7dbe0613f4b3e23df93 Mon Sep 17 00:00:00 2001 From: paul Date: Fri, 13 Dec 2002 20:15:29 +0000 Subject: Initial revision --- ospfd/ospf_network.c | 192 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 192 insertions(+) create mode 100644 ospfd/ospf_network.c (limited to 'ospfd/ospf_network.c') diff --git a/ospfd/ospf_network.c b/ospfd/ospf_network.c new file mode 100644 index 00000000..56ec8647 --- /dev/null +++ b/ospfd/ospf_network.c @@ -0,0 +1,192 @@ +/* + * OSPF network related functions + * Copyright (C) 1999 Toshiaki Takada + * + * This file is part of GNU Zebra. + * + * GNU Zebra is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + * + * GNU Zebra is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Zebra; see the file COPYING. If not, write to the Free + * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA + * 02111-1307, USA. + */ + +#include + +#include "thread.h" +#include "linklist.h" +#include "prefix.h" +#include "if.h" +#include "sockunion.h" +#include "log.h" +#include "sockopt.h" + +#include "ospfd/ospfd.h" +#include "ospfd/ospf_network.h" +#include "ospfd/ospf_interface.h" +#include "ospfd/ospf_asbr.h" +#include "ospfd/ospf_lsa.h" +#include "ospfd/ospf_lsdb.h" +#include "ospfd/ospf_neighbor.h" +#include "ospfd/ospf_packet.h" + +/* Join to the OSPF ALL SPF ROUTERS multicast group. */ +int +ospf_if_add_allspfrouters (struct ospf *top, struct prefix *p, + unsigned int ifindex) +{ + int ret; + + ret = setsockopt_multicast_ipv4 (top->fd, IP_ADD_MEMBERSHIP, + p->u.prefix4, htonl (OSPF_ALLSPFROUTERS), + ifindex); + if (ret < 0) + zlog_warn ("can't setsockopt IP_ADD_MEMBERSHIP (AllSPFRouters): %s", + strerror (errno)); + else + zlog_info ("interface %s join AllSPFRouters Multicast group.", + inet_ntoa (p->u.prefix4)); + + return ret; +} + +int +ospf_if_drop_allspfrouters (struct ospf *top, struct prefix *p, + unsigned int ifindex) +{ + int ret; + + ret = setsockopt_multicast_ipv4 (top->fd, IP_DROP_MEMBERSHIP, + p->u.prefix4, htonl (OSPF_ALLSPFROUTERS), + ifindex); + if (ret < 0) + zlog_warn("can't setsockopt IP_DROP_MEMBERSHIP (AllSPFRouters): %s", + strerror (errno)); + else + zlog_info ("interface %s leave AllSPFRouters Multicast group.", + inet_ntoa (p->u.prefix4)); + + return ret; +} + +/* Join to the OSPF ALL Designated ROUTERS multicast group. */ +int +ospf_if_add_alldrouters (struct ospf *top, struct prefix *p, unsigned int + ifindex) +{ + int ret; + + ret = setsockopt_multicast_ipv4 (top->fd, IP_ADD_MEMBERSHIP, + p->u.prefix4, htonl (OSPF_ALLDROUTERS), + ifindex); + if (ret < 0) + zlog_warn ("can't setsockopt IP_ADD_MEMBERSHIP (AllDRouters): %s", + strerror (errno)); + else + zlog_info ("interface %s join AllDRouters Multicast group.", + inet_ntoa (p->u.prefix4)); + + return ret; +} + +int +ospf_if_drop_alldrouters (struct ospf *top, struct prefix *p, unsigned int + ifindex) +{ + int ret; + + ret = setsockopt_multicast_ipv4 (top->fd, IP_DROP_MEMBERSHIP, + p->u.prefix4, htonl (OSPF_ALLDROUTERS), + ifindex); + if (ret < 0) + zlog_warn ("can't setsockopt IP_DROP_MEMBERSHIP (AllDRouters): %s", + strerror (errno)); + else + zlog_info ("interface %s leave AllDRouters Multicast group.", + inet_ntoa (p->u.prefix4)); + + return ret; +} + +int +ospf_if_ipmulticast (struct ospf *top, struct prefix *p, unsigned int ifindex) +{ + u_char val; + int ret, len; + + val = 0; + len = sizeof (val); + + /* Prevent receiving self-origined multicast packets. */ + ret = setsockopt (top->fd, IPPROTO_IP, IP_MULTICAST_LOOP, (void *)&val, len); + if (ret < 0) + zlog_warn ("can't setsockopt IP_MULTICAST_LOOP(0): %s", strerror (errno)); + + /* Explicitly set multicast ttl to 1 -- endo. */ + val = 1; + ret = setsockopt (top->fd, IPPROTO_IP, IP_MULTICAST_TTL, (void *)&val, len); + if (ret < 0) + zlog_warn ("can't setsockopt IP_MULTICAST_TTL(1): %s", strerror (errno)); + + ret = setsockopt_multicast_ipv4 (top->fd, IP_MULTICAST_IF, + p->u.prefix4, 0, ifindex); + if (ret < 0) + zlog_warn ("can't setsockopt IP_MULTICAST_IF: %s", strerror (errno)); + + return ret; +} + +int +ospf_sock_init (void) +{ + int ospf_sock; + int ret, tos, hincl = 1; + + ospf_sock = socket (AF_INET, SOCK_RAW, IPPROTO_OSPFIGP); + if (ospf_sock < 0) + { + zlog_warn ("ospf_read_sock_init: socket: %s", strerror (errno)); + return -1; + } + + /* Set precedence field. */ +#ifdef IPTOS_PREC_INTERNETCONTROL + tos = IPTOS_PREC_INTERNETCONTROL; + ret = setsockopt (ospf_sock, IPPROTO_IP, IP_TOS, + (char *) &tos, sizeof (int)); + if (ret < 0) + { + zlog_warn ("can't set sockopt IP_TOS %d to socket %d", tos, ospf_sock); + close (ospf_sock); /* Prevent sd leak. */ + return ret; + } +#endif /* IPTOS_PREC_INTERNETCONTROL */ + + /* we will include IP header with packet */ + ret = setsockopt (ospf_sock, IPPROTO_IP, IP_HDRINCL, &hincl, sizeof (hincl)); + if (ret < 0) + zlog_warn ("Can't set IP_HDRINCL option"); + +#if defined (IP_PKTINFO) + ret = setsockopt (ospf_sock, IPPROTO_IP, IP_PKTINFO, &hincl, sizeof (hincl)); + if (ret < 0) + zlog_warn ("Can't set IP_PKTINFO option"); +#elif defined (IP_RECVIF) + ret = setsockopt (ospf_sock, IPPROTO_IP, IP_RECVIF, &hincl, sizeof (hincl)); + if (ret < 0) + zlog_warn ("Can't set IP_RECVIF option"); +#else +#warning "cannot be able to receive link information on this OS" +#endif + + return ospf_sock; +} -- cgit v1.2.1