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"
28 #include "lib_errors.h"
31 #include "ospf6_proto.h"
32 #include "ospf6_network.h"
36 struct in6_addr allspfrouters6
;
37 struct in6_addr alldrouters6
;
39 /* setsockopt MulticastLoop to off */
40 static void ospf6_reset_mcastloop(void)
43 if (setsockopt(ospf6_sock
, IPPROTO_IPV6
, IPV6_MULTICAST_LOOP
, &off
,
46 zlog_warn("Network: reset IPV6_MULTICAST_LOOP failed: %s",
47 safe_strerror(errno
));
50 static void ospf6_set_pktinfo(void)
52 setsockopt_ipv6_pktinfo(ospf6_sock
, 1);
55 static void ospf6_set_transport_class(void)
57 #ifdef IPTOS_PREC_INTERNETCONTROL
58 setsockopt_ipv6_tclass(ospf6_sock
, IPTOS_PREC_INTERNETCONTROL
);
62 static void ospf6_set_checksum(void)
65 #ifndef DISABLE_IPV6_CHECKSUM
66 if (setsockopt(ospf6_sock
, IPPROTO_IPV6
, IPV6_CHECKSUM
, &offset
,
69 zlog_warn("Network: set IPV6_CHECKSUM failed: %s",
70 safe_strerror(errno
));
72 zlog_warn("Network: Don't set IPV6_CHECKSUM");
73 #endif /* DISABLE_IPV6_CHECKSUM */
76 void ospf6_serv_close(void)
85 /* Make ospf6d's server socket. */
86 int ospf6_serv_sock(void)
88 frr_with_privs(&ospf6d_privs
) {
90 ospf6_sock
= socket(AF_INET6
, SOCK_RAW
, IPPROTO_OSPFIGP
);
92 zlog_warn("Network: can't create OSPF6 socket.");
97 /* set socket options */
99 sockopt_reuseaddr(ospf6_sock
);
101 ospf6_set_reuseaddr();
103 ospf6_reset_mcastloop();
105 ospf6_set_transport_class();
106 ospf6_set_checksum();
108 /* setup global in6_addr, allspf6 and alldr6 for later use */
109 inet_pton(AF_INET6
, ALLSPFROUTERS6
, &allspfrouters6
);
110 inet_pton(AF_INET6
, ALLDROUTERS6
, &alldrouters6
);
115 /* ospf6 set socket option */
116 int ospf6_sso(ifindex_t ifindex
, struct in6_addr
*group
, int option
)
118 struct ipv6_mreq mreq6
;
120 int bufsize
= (8 * 1024 * 1024);
123 mreq6
.ipv6mr_interface
= ifindex
;
124 memcpy(&mreq6
.ipv6mr_multiaddr
, group
, sizeof(struct in6_addr
));
126 ret
= setsockopt(ospf6_sock
, IPPROTO_IPV6
, option
, &mreq6
,
131 "Network: setsockopt (%d) on ifindex %d failed: %s",
132 option
, ifindex
, safe_strerror(errno
));
136 setsockopt_so_sendbuf(ospf6_sock
, bufsize
);
137 setsockopt_so_recvbuf(ospf6_sock
, bufsize
);
142 static int iov_count(struct iovec
*iov
)
145 for (i
= 0; iov
[i
].iov_base
; i
++)
150 static int iov_totallen(struct iovec
*iov
)
154 for (i
= 0; iov
[i
].iov_base
; i
++)
155 totallen
+= iov
[i
].iov_len
;
159 int ospf6_sendmsg(struct in6_addr
*src
, struct in6_addr
*dst
,
160 ifindex_t
*ifindex
, struct iovec
*message
)
163 struct msghdr smsghdr
;
164 struct cmsghdr
*scmsgp
;
167 uint8_t buf
[CMSG_SPACE(sizeof(struct in6_pktinfo
))];
169 struct in6_pktinfo
*pktinfo
;
170 struct sockaddr_in6 dst_sin6
;
175 memset(&cmsgbuf
, 0, sizeof(cmsgbuf
));
176 scmsgp
= (struct cmsghdr
*)&cmsgbuf
;
177 pktinfo
= (struct in6_pktinfo
*)(CMSG_DATA(scmsgp
));
178 memset(&dst_sin6
, 0, sizeof(struct sockaddr_in6
));
181 pktinfo
->ipi6_ifindex
= *ifindex
;
183 memcpy(&pktinfo
->ipi6_addr
, src
, sizeof(struct in6_addr
));
185 memset(&pktinfo
->ipi6_addr
, 0, sizeof(struct in6_addr
));
187 /* destination address */
188 dst_sin6
.sin6_family
= AF_INET6
;
190 dst_sin6
.sin6_len
= sizeof(struct sockaddr_in6
);
192 memcpy(&dst_sin6
.sin6_addr
, dst
, sizeof(struct in6_addr
));
193 dst_sin6
.sin6_scope_id
= *ifindex
;
195 /* send control msg */
196 scmsgp
->cmsg_level
= IPPROTO_IPV6
;
197 scmsgp
->cmsg_type
= IPV6_PKTINFO
;
198 scmsgp
->cmsg_len
= CMSG_LEN(sizeof(struct in6_pktinfo
));
199 /* scmsgp = CMSG_NXTHDR (&smsghdr, scmsgp); */
202 memset(&smsghdr
, 0, sizeof(smsghdr
));
203 smsghdr
.msg_iov
= message
;
204 smsghdr
.msg_iovlen
= iov_count(message
);
205 smsghdr
.msg_name
= (caddr_t
)&dst_sin6
;
206 smsghdr
.msg_namelen
= sizeof(struct sockaddr_in6
);
207 smsghdr
.msg_control
= (caddr_t
)&cmsgbuf
.buf
;
208 smsghdr
.msg_controllen
= sizeof(cmsgbuf
.buf
);
210 retval
= sendmsg(ospf6_sock
, &smsghdr
, 0);
211 if (retval
!= iov_totallen(message
))
212 zlog_warn("sendmsg failed: ifindex: %d: %s (%d)", *ifindex
,
213 safe_strerror(errno
), errno
);
218 int ospf6_recvmsg(struct in6_addr
*src
, struct in6_addr
*dst
,
219 ifindex_t
*ifindex
, struct iovec
*message
)
222 struct msghdr rmsghdr
;
223 struct cmsghdr
*rcmsgp
;
224 uint8_t cmsgbuf
[CMSG_SPACE(sizeof(struct in6_pktinfo
))];
225 struct in6_pktinfo
*pktinfo
;
226 struct sockaddr_in6 src_sin6
;
228 rcmsgp
= (struct cmsghdr
*)cmsgbuf
;
229 pktinfo
= (struct in6_pktinfo
*)(CMSG_DATA(rcmsgp
));
230 memset(&src_sin6
, 0, sizeof(struct sockaddr_in6
));
232 /* receive control msg */
233 rcmsgp
->cmsg_level
= IPPROTO_IPV6
;
234 rcmsgp
->cmsg_type
= IPV6_PKTINFO
;
235 rcmsgp
->cmsg_len
= CMSG_LEN(sizeof(struct in6_pktinfo
));
236 /* rcmsgp = CMSG_NXTHDR (&rmsghdr, rcmsgp); */
238 /* receive msg hdr */
239 memset(&rmsghdr
, 0, sizeof(rmsghdr
));
240 rmsghdr
.msg_iov
= message
;
241 rmsghdr
.msg_iovlen
= iov_count(message
);
242 rmsghdr
.msg_name
= (caddr_t
)&src_sin6
;
243 rmsghdr
.msg_namelen
= sizeof(struct sockaddr_in6
);
244 rmsghdr
.msg_control
= (caddr_t
)cmsgbuf
;
245 rmsghdr
.msg_controllen
= sizeof(cmsgbuf
);
247 retval
= recvmsg(ospf6_sock
, &rmsghdr
, 0);
249 zlog_warn("recvmsg failed: %s", safe_strerror(errno
));
250 else if (retval
== iov_totallen(message
))
251 zlog_warn("recvmsg read full buffer size: %d", retval
);
255 memcpy(src
, &src_sin6
.sin6_addr
, sizeof(struct in6_addr
));
257 /* destination address */
259 *ifindex
= pktinfo
->ipi6_ifindex
;
261 memcpy(dst
, &pktinfo
->ipi6_addr
, sizeof(struct in6_addr
));