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"
33 extern struct zebra_privs_t ospf6d_privs
;
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 /* Make ospf6d's server socket. */
77 int ospf6_serv_sock(void)
79 if (ospf6d_privs
.change(ZPRIVS_RAISE
))
80 zlog_err("ospf6_serv_sock: could not raise privs");
82 ospf6_sock
= socket(AF_INET6
, SOCK_RAW
, IPPROTO_OSPFIGP
);
84 zlog_warn("Network: can't create OSPF6 socket.");
85 if (ospf6d_privs
.change(ZPRIVS_LOWER
))
86 zlog_err("ospf_sock_init: could not lower privs");
89 if (ospf6d_privs
.change(ZPRIVS_LOWER
))
90 zlog_err("ospf_sock_init: could not lower privs");
92 /* set socket options */
94 sockopt_reuseaddr(ospf6_sock
);
96 ospf6_set_reuseaddr();
98 ospf6_reset_mcastloop();
100 ospf6_set_transport_class();
101 ospf6_set_checksum();
103 /* setup global in6_addr, allspf6 and alldr6 for later use */
104 inet_pton(AF_INET6
, ALLSPFROUTERS6
, &allspfrouters6
);
105 inet_pton(AF_INET6
, ALLDROUTERS6
, &alldrouters6
);
110 /* ospf6 set socket option */
111 int ospf6_sso(ifindex_t ifindex
, struct in6_addr
*group
, int option
)
113 struct ipv6_mreq mreq6
;
115 int bufsize
= (8 * 1024 * 1024);
118 mreq6
.ipv6mr_interface
= ifindex
;
119 memcpy(&mreq6
.ipv6mr_multiaddr
, group
, sizeof(struct in6_addr
));
121 ret
= setsockopt(ospf6_sock
, IPPROTO_IPV6
, option
, &mreq6
,
124 zlog_err("Network: setsockopt (%d) on ifindex %d failed: %s",
125 option
, ifindex
, safe_strerror(errno
));
129 setsockopt_so_sendbuf(ospf6_sock
, bufsize
);
130 setsockopt_so_recvbuf(ospf6_sock
, bufsize
);
135 static int iov_count(struct iovec
*iov
)
138 for (i
= 0; iov
[i
].iov_base
; i
++)
143 static int iov_totallen(struct iovec
*iov
)
147 for (i
= 0; iov
[i
].iov_base
; i
++)
148 totallen
+= iov
[i
].iov_len
;
152 int ospf6_sendmsg(struct in6_addr
*src
, struct in6_addr
*dst
,
153 ifindex_t
*ifindex
, struct iovec
*message
)
156 struct msghdr smsghdr
;
157 struct cmsghdr
*scmsgp
;
160 u_char buf
[CMSG_SPACE(sizeof(struct in6_pktinfo
))];
162 struct in6_pktinfo
*pktinfo
;
163 struct sockaddr_in6 dst_sin6
;
168 scmsgp
= (struct cmsghdr
*)&cmsgbuf
;
169 pktinfo
= (struct in6_pktinfo
*)(CMSG_DATA(scmsgp
));
170 memset(&dst_sin6
, 0, sizeof(struct sockaddr_in6
));
173 pktinfo
->ipi6_ifindex
= *ifindex
;
175 memcpy(&pktinfo
->ipi6_addr
, src
, sizeof(struct in6_addr
));
177 memset(&pktinfo
->ipi6_addr
, 0, sizeof(struct in6_addr
));
179 /* destination address */
180 dst_sin6
.sin6_family
= AF_INET6
;
182 dst_sin6
.sin6_len
= sizeof(struct sockaddr_in6
);
184 memcpy(&dst_sin6
.sin6_addr
, dst
, sizeof(struct in6_addr
));
185 dst_sin6
.sin6_scope_id
= *ifindex
;
187 /* send control msg */
188 scmsgp
->cmsg_level
= IPPROTO_IPV6
;
189 scmsgp
->cmsg_type
= IPV6_PKTINFO
;
190 scmsgp
->cmsg_len
= CMSG_LEN(sizeof(struct in6_pktinfo
));
191 /* scmsgp = CMSG_NXTHDR (&smsghdr, scmsgp); */
194 memset(&smsghdr
, 0, sizeof(smsghdr
));
195 smsghdr
.msg_iov
= message
;
196 smsghdr
.msg_iovlen
= iov_count(message
);
197 smsghdr
.msg_name
= (caddr_t
)&dst_sin6
;
198 smsghdr
.msg_namelen
= sizeof(struct sockaddr_in6
);
199 smsghdr
.msg_control
= (caddr_t
)&cmsgbuf
.buf
;
200 smsghdr
.msg_controllen
= sizeof(cmsgbuf
.buf
);
202 retval
= sendmsg(ospf6_sock
, &smsghdr
, 0);
203 if (retval
!= iov_totallen(message
))
204 zlog_warn("sendmsg failed: ifindex: %d: %s (%d)", *ifindex
,
205 safe_strerror(errno
), errno
);
210 int ospf6_recvmsg(struct in6_addr
*src
, struct in6_addr
*dst
,
211 ifindex_t
*ifindex
, struct iovec
*message
)
214 struct msghdr rmsghdr
;
215 struct cmsghdr
*rcmsgp
;
216 u_char cmsgbuf
[CMSG_SPACE(sizeof(struct in6_pktinfo
))];
217 struct in6_pktinfo
*pktinfo
;
218 struct sockaddr_in6 src_sin6
;
220 rcmsgp
= (struct cmsghdr
*)cmsgbuf
;
221 pktinfo
= (struct in6_pktinfo
*)(CMSG_DATA(rcmsgp
));
222 memset(&src_sin6
, 0, sizeof(struct sockaddr_in6
));
224 /* receive control msg */
225 rcmsgp
->cmsg_level
= IPPROTO_IPV6
;
226 rcmsgp
->cmsg_type
= IPV6_PKTINFO
;
227 rcmsgp
->cmsg_len
= CMSG_LEN(sizeof(struct in6_pktinfo
));
228 /* rcmsgp = CMSG_NXTHDR (&rmsghdr, rcmsgp); */
230 /* receive msg hdr */
231 memset(&rmsghdr
, 0, sizeof(rmsghdr
));
232 rmsghdr
.msg_iov
= message
;
233 rmsghdr
.msg_iovlen
= iov_count(message
);
234 rmsghdr
.msg_name
= (caddr_t
)&src_sin6
;
235 rmsghdr
.msg_namelen
= sizeof(struct sockaddr_in6
);
236 rmsghdr
.msg_control
= (caddr_t
)cmsgbuf
;
237 rmsghdr
.msg_controllen
= sizeof(cmsgbuf
);
239 retval
= recvmsg(ospf6_sock
, &rmsghdr
, 0);
241 zlog_warn("recvmsg failed: %s", safe_strerror(errno
));
242 else if (retval
== iov_totallen(message
))
243 zlog_warn("recvmsg read full buffer size: %d", retval
);
247 memcpy(src
, &src_sin6
.sin6_addr
, sizeof(struct in6_addr
));
249 /* destination address */
251 *ifindex
= pktinfo
->ipi6_ifindex
;
253 memcpy(dst
, &pktinfo
->ipi6_addr
, sizeof(struct in6_addr
));