2 * Copyright (C) 2003 Yasuhiro Ohara
4 * This file is part of GNU Zebra.
6 * GNU Zebra is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2, or (at your option) any
11 * GNU Zebra is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; see the file COPYING; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "sockunion.h"
30 #include "ospf6_proto.h"
31 #include "ospf6_network.h"
35 struct in6_addr allspfrouters6
;
36 struct in6_addr alldrouters6
;
38 /* setsockopt MulticastLoop to off */
39 static void ospf6_reset_mcastloop(void)
42 if (setsockopt(ospf6_sock
, IPPROTO_IPV6
, IPV6_MULTICAST_LOOP
, &off
,
45 zlog_warn("Network: reset IPV6_MULTICAST_LOOP failed: %s",
46 safe_strerror(errno
));
49 static void ospf6_set_pktinfo(void)
51 setsockopt_ipv6_pktinfo(ospf6_sock
, 1);
54 static void ospf6_set_transport_class(void)
56 #ifdef IPTOS_PREC_INTERNETCONTROL
57 setsockopt_ipv6_tclass(ospf6_sock
, IPTOS_PREC_INTERNETCONTROL
);
61 static void ospf6_set_checksum(void)
64 #ifndef DISABLE_IPV6_CHECKSUM
65 if (setsockopt(ospf6_sock
, IPPROTO_IPV6
, IPV6_CHECKSUM
, &offset
,
68 zlog_warn("Network: set IPV6_CHECKSUM failed: %s",
69 safe_strerror(errno
));
71 zlog_warn("Network: Don't set IPV6_CHECKSUM");
72 #endif /* DISABLE_IPV6_CHECKSUM */
75 /* Make ospf6d's server socket. */
76 int ospf6_serv_sock(void)
78 if (ospf6d_privs
.change(ZPRIVS_RAISE
))
79 zlog_err("ospf6_serv_sock: could not raise privs");
81 ospf6_sock
= socket(AF_INET6
, SOCK_RAW
, IPPROTO_OSPFIGP
);
83 zlog_warn("Network: can't create OSPF6 socket.");
84 if (ospf6d_privs
.change(ZPRIVS_LOWER
))
85 zlog_err("ospf_sock_init: could not lower privs");
88 if (ospf6d_privs
.change(ZPRIVS_LOWER
))
89 zlog_err("ospf_sock_init: could not lower privs");
91 /* set socket options */
93 sockopt_reuseaddr(ospf6_sock
);
95 ospf6_set_reuseaddr();
97 ospf6_reset_mcastloop();
99 ospf6_set_transport_class();
100 ospf6_set_checksum();
102 /* setup global in6_addr, allspf6 and alldr6 for later use */
103 inet_pton(AF_INET6
, ALLSPFROUTERS6
, &allspfrouters6
);
104 inet_pton(AF_INET6
, ALLDROUTERS6
, &alldrouters6
);
109 /* ospf6 set socket option */
110 int ospf6_sso(ifindex_t ifindex
, struct in6_addr
*group
, int option
)
112 struct ipv6_mreq mreq6
;
114 int bufsize
= (8 * 1024 * 1024);
117 mreq6
.ipv6mr_interface
= ifindex
;
118 memcpy(&mreq6
.ipv6mr_multiaddr
, group
, sizeof(struct in6_addr
));
120 ret
= setsockopt(ospf6_sock
, IPPROTO_IPV6
, option
, &mreq6
,
123 zlog_err("Network: setsockopt (%d) on ifindex %d failed: %s",
124 option
, ifindex
, safe_strerror(errno
));
128 setsockopt_so_sendbuf(ospf6_sock
, bufsize
);
129 setsockopt_so_recvbuf(ospf6_sock
, bufsize
);
134 static int iov_count(struct iovec
*iov
)
137 for (i
= 0; iov
[i
].iov_base
; i
++)
142 static int iov_totallen(struct iovec
*iov
)
146 for (i
= 0; iov
[i
].iov_base
; i
++)
147 totallen
+= iov
[i
].iov_len
;
151 int ospf6_sendmsg(struct in6_addr
*src
, struct in6_addr
*dst
,
152 ifindex_t
*ifindex
, struct iovec
*message
)
155 struct msghdr smsghdr
;
156 struct cmsghdr
*scmsgp
;
159 uint8_t buf
[CMSG_SPACE(sizeof(struct in6_pktinfo
))];
161 struct in6_pktinfo
*pktinfo
;
162 struct sockaddr_in6 dst_sin6
;
167 scmsgp
= (struct cmsghdr
*)&cmsgbuf
;
168 pktinfo
= (struct in6_pktinfo
*)(CMSG_DATA(scmsgp
));
169 memset(&dst_sin6
, 0, sizeof(struct sockaddr_in6
));
172 pktinfo
->ipi6_ifindex
= *ifindex
;
174 memcpy(&pktinfo
->ipi6_addr
, src
, sizeof(struct in6_addr
));
176 memset(&pktinfo
->ipi6_addr
, 0, sizeof(struct in6_addr
));
178 /* destination address */
179 dst_sin6
.sin6_family
= AF_INET6
;
181 dst_sin6
.sin6_len
= sizeof(struct sockaddr_in6
);
183 memcpy(&dst_sin6
.sin6_addr
, dst
, sizeof(struct in6_addr
));
184 dst_sin6
.sin6_scope_id
= *ifindex
;
186 /* send control msg */
187 scmsgp
->cmsg_level
= IPPROTO_IPV6
;
188 scmsgp
->cmsg_type
= IPV6_PKTINFO
;
189 scmsgp
->cmsg_len
= CMSG_LEN(sizeof(struct in6_pktinfo
));
190 /* scmsgp = CMSG_NXTHDR (&smsghdr, scmsgp); */
193 memset(&smsghdr
, 0, sizeof(smsghdr
));
194 smsghdr
.msg_iov
= message
;
195 smsghdr
.msg_iovlen
= iov_count(message
);
196 smsghdr
.msg_name
= (caddr_t
)&dst_sin6
;
197 smsghdr
.msg_namelen
= sizeof(struct sockaddr_in6
);
198 smsghdr
.msg_control
= (caddr_t
)&cmsgbuf
.buf
;
199 smsghdr
.msg_controllen
= sizeof(cmsgbuf
.buf
);
201 retval
= sendmsg(ospf6_sock
, &smsghdr
, 0);
202 if (retval
!= iov_totallen(message
))
203 zlog_warn("sendmsg failed: ifindex: %d: %s (%d)", *ifindex
,
204 safe_strerror(errno
), errno
);
209 int ospf6_recvmsg(struct in6_addr
*src
, struct in6_addr
*dst
,
210 ifindex_t
*ifindex
, struct iovec
*message
)
213 struct msghdr rmsghdr
;
214 struct cmsghdr
*rcmsgp
;
215 uint8_t cmsgbuf
[CMSG_SPACE(sizeof(struct in6_pktinfo
))];
216 struct in6_pktinfo
*pktinfo
;
217 struct sockaddr_in6 src_sin6
;
219 rcmsgp
= (struct cmsghdr
*)cmsgbuf
;
220 pktinfo
= (struct in6_pktinfo
*)(CMSG_DATA(rcmsgp
));
221 memset(&src_sin6
, 0, sizeof(struct sockaddr_in6
));
223 /* receive control msg */
224 rcmsgp
->cmsg_level
= IPPROTO_IPV6
;
225 rcmsgp
->cmsg_type
= IPV6_PKTINFO
;
226 rcmsgp
->cmsg_len
= CMSG_LEN(sizeof(struct in6_pktinfo
));
227 /* rcmsgp = CMSG_NXTHDR (&rmsghdr, rcmsgp); */
229 /* receive msg hdr */
230 memset(&rmsghdr
, 0, sizeof(rmsghdr
));
231 rmsghdr
.msg_iov
= message
;
232 rmsghdr
.msg_iovlen
= iov_count(message
);
233 rmsghdr
.msg_name
= (caddr_t
)&src_sin6
;
234 rmsghdr
.msg_namelen
= sizeof(struct sockaddr_in6
);
235 rmsghdr
.msg_control
= (caddr_t
)cmsgbuf
;
236 rmsghdr
.msg_controllen
= sizeof(cmsgbuf
);
238 retval
= recvmsg(ospf6_sock
, &rmsghdr
, 0);
240 zlog_warn("recvmsg failed: %s", safe_strerror(errno
));
241 else if (retval
== iov_totallen(message
))
242 zlog_warn("recvmsg read full buffer size: %d", retval
);
246 memcpy(src
, &src_sin6
.sin6_addr
, sizeof(struct in6_addr
));
248 /* destination address */
250 *ifindex
= pktinfo
->ipi6_ifindex
;
252 memcpy(dst
, &pktinfo
->ipi6_addr
, sizeof(struct in6_addr
));