2 * OSPF network related functions
3 * Copyright (C) 1999 Toshiaki Takada
5 * This file is part of GNU Zebra.
7 * GNU Zebra is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2, or (at your option) any
12 * GNU Zebra is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Zebra; see the file COPYING. If not, write to the Free
19 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
29 #include "sockunion.h"
34 extern struct zebra_privs_t ospfd_privs
;
36 #include "ospfd/ospfd.h"
37 #include "ospfd/ospf_network.h"
38 #include "ospfd/ospf_interface.h"
39 #include "ospfd/ospf_asbr.h"
40 #include "ospfd/ospf_lsa.h"
41 #include "ospfd/ospf_lsdb.h"
42 #include "ospfd/ospf_neighbor.h"
43 #include "ospfd/ospf_packet.h"
47 /* Join to the OSPF ALL SPF ROUTERS multicast group. */
49 ospf_if_add_allspfrouters (struct ospf
*top
, struct prefix
*p
,
54 ret
= setsockopt_multicast_ipv4 (top
->fd
, IP_ADD_MEMBERSHIP
,
55 p
->u
.prefix4
, htonl (OSPF_ALLSPFROUTERS
),
58 zlog_warn ("can't setsockopt IP_ADD_MEMBERSHIP (fd %d, addr %s, "
59 "ifindex %u, AllSPFRouters): %s; perhaps a kernel limit "
60 "on # of multicast group memberships has been exceeded?",
61 top
->fd
, inet_ntoa(p
->u
.prefix4
), ifindex
, safe_strerror(errno
));
63 zlog_info ("interface %s join AllSPFRouters Multicast group.",
64 inet_ntoa (p
->u
.prefix4
));
70 ospf_if_drop_allspfrouters (struct ospf
*top
, struct prefix
*p
,
75 ret
= setsockopt_multicast_ipv4 (top
->fd
, IP_DROP_MEMBERSHIP
,
76 p
->u
.prefix4
, htonl (OSPF_ALLSPFROUTERS
),
79 zlog_warn ("can't setsockopt IP_DROP_MEMBERSHIP (fd %d, addr %s, "
80 "ifindex %u, AllSPFRouters): %s",
81 top
->fd
, inet_ntoa(p
->u
.prefix4
), ifindex
, safe_strerror(errno
));
83 zlog_info ("interface %s leave AllSPFRouters Multicast group.",
84 inet_ntoa (p
->u
.prefix4
));
89 /* Join to the OSPF ALL Designated ROUTERS multicast group. */
91 ospf_if_add_alldrouters (struct ospf
*top
, struct prefix
*p
, unsigned int
96 ret
= setsockopt_multicast_ipv4 (top
->fd
, IP_ADD_MEMBERSHIP
,
97 p
->u
.prefix4
, htonl (OSPF_ALLDROUTERS
),
100 zlog_warn ("can't setsockopt IP_ADD_MEMBERSHIP (fd %d, addr %s, "
101 "ifindex %u, AllDRouters): %s; perhaps a kernel limit "
102 "on # of multicast group memberships has been exceeded?",
103 top
->fd
, inet_ntoa(p
->u
.prefix4
), ifindex
, safe_strerror(errno
));
105 zlog_info ("interface %s join AllDRouters Multicast group.",
106 inet_ntoa (p
->u
.prefix4
));
112 ospf_if_drop_alldrouters (struct ospf
*top
, struct prefix
*p
, unsigned int
117 ret
= setsockopt_multicast_ipv4 (top
->fd
, IP_DROP_MEMBERSHIP
,
118 p
->u
.prefix4
, htonl (OSPF_ALLDROUTERS
),
121 zlog_warn ("can't setsockopt IP_DROP_MEMBERSHIP (fd %d, addr %s, "
122 "ifindex %u, AllDRouters): %s",
123 top
->fd
, inet_ntoa(p
->u
.prefix4
), ifindex
, safe_strerror(errno
));
125 zlog_info ("interface %s leave AllDRouters Multicast group.",
126 inet_ntoa (p
->u
.prefix4
));
132 ospf_if_ipmulticast (struct ospf
*top
, struct prefix
*p
, unsigned int ifindex
)
140 /* Prevent receiving self-origined multicast packets. */
141 ret
= setsockopt (top
->fd
, IPPROTO_IP
, IP_MULTICAST_LOOP
, (void *)&val
, len
);
143 zlog_warn ("can't setsockopt IP_MULTICAST_LOOP(0) for fd %d: %s",
144 top
->fd
, safe_strerror(errno
));
146 /* Explicitly set multicast ttl to 1 -- endo. */
148 ret
= setsockopt (top
->fd
, IPPROTO_IP
, IP_MULTICAST_TTL
, (void *)&val
, len
);
150 zlog_warn ("can't setsockopt IP_MULTICAST_TTL(1) for fd %d: %s",
151 top
->fd
, safe_strerror (errno
));
153 ret
= setsockopt_multicast_ipv4 (top
->fd
, IP_MULTICAST_IF
,
154 p
->u
.prefix4
, 0, ifindex
);
156 zlog_warn("can't setsockopt IP_MULTICAST_IF(fd %d, addr %s, "
158 top
->fd
, inet_ntoa(p
->u
.prefix4
), ifindex
, safe_strerror(errno
));
164 ospf_sock_init (void)
168 * XXX warning: unused variable `tos'
169 * tos should be ifdefed similarly to usage
171 int ret
, tos
, hincl
= 1;
173 if ( ospfd_privs
.change (ZPRIVS_RAISE
) )
174 zlog_err ("ospf_sock_init: could not raise privs, %s",
175 safe_strerror (errno
) );
177 ospf_sock
= socket (AF_INET
, SOCK_RAW
, IPPROTO_OSPFIGP
);
180 if ( ospfd_privs
.change (ZPRIVS_LOWER
) )
181 zlog_err ("ospf_sock_init: could not lower privs, %s",
182 safe_strerror (errno
) );
183 zlog_err ("ospf_read_sock_init: socket: %s", safe_strerror (errno
));
188 /* we will include IP header with packet */
189 ret
= setsockopt (ospf_sock
, IPPROTO_IP
, IP_HDRINCL
, &hincl
, sizeof (hincl
));
192 if ( ospfd_privs
.change (ZPRIVS_LOWER
) )
193 zlog_err ("ospf_sock_init: could not lower privs, %s",
194 safe_strerror (errno
) );
195 zlog_warn ("Can't set IP_HDRINCL option for fd %d",ospf_sock
);
197 #elif defined (IPTOS_PREC_INTERNETCONTROL)
198 #warning "IP_HDRINCL not available on this system"
199 #warning "using IPTOS_PREC_INTERNETCONTROL"
200 /* Set precedence field. */
201 tos
= IPTOS_PREC_INTERNETCONTROL
;
202 ret
= setsockopt (ospf_sock
, IPPROTO_IP
, IP_TOS
,
203 (char *) &tos
, sizeof (int));
206 if ( ospfd_privs
.change (ZPRIVS_LOWER
) )
207 zlog_err ("ospf_sock_init: could not lower privs, %s",
208 safe_strerror (errno
) );
209 zlog_warn ("can't set sockopt IP_TOS %d to socket %d", tos
, ospf_sock
);
210 close (ospf_sock
); /* Prevent sd leak. */
213 #else /* !IPTOS_PREC_INTERNETCONTROL */
214 #warning "IP_HDRINCL not available, nor is IPTOS_PREC_INTERNETCONTROL"
215 zlog_warn ("IP_HDRINCL option not available");
216 #endif /* IP_HDRINCL */
218 ret
= setsockopt_ifindex (AF_INET
, ospf_sock
, 1);
221 zlog_warn ("Can't set pktinfo option for fd %d", ospf_sock
);
223 if (ospfd_privs
.change (ZPRIVS_LOWER
))
225 zlog_err ("ospf_sock_init: could not lower privs, %s",
226 safe_strerror (errno
) );