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718e3744 | 1 | /* |
508e53e2 | 2 | * Copyright (C) 2003 Yasuhiro Ohara |
718e3744 | 3 | * |
4 | * This file is part of GNU Zebra. | |
5 | * | |
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 | |
9 | * later version. | |
10 | * | |
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. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GNU Zebra; see the file COPYING. If not, write to the | |
18 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | * Boston, MA 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | #include <zebra.h> | |
508e53e2 | 23 | |
718e3744 | 24 | #include "log.h" |
508e53e2 | 25 | #include "memory.h" |
718e3744 | 26 | #include "sockunion.h" |
03d52f8d | 27 | #include "sockopt.h" |
edd7c245 | 28 | #include "privs.h" |
718e3744 | 29 | |
718e3744 | 30 | #include "ospf6_proto.h" |
508e53e2 | 31 | #include "ospf6_network.h" |
718e3744 | 32 | |
edd7c245 | 33 | extern struct zebra_privs_t ospf6d_privs; |
718e3744 | 34 | |
508e53e2 | 35 | int ospf6_sock; |
36 | struct in6_addr allspfrouters6; | |
37 | struct in6_addr alldrouters6; | |
718e3744 | 38 | |
508e53e2 | 39 | /* setsockopt ReUseAddr to on */ |
40 | void | |
41 | ospf6_set_reuseaddr () | |
718e3744 | 42 | { |
508e53e2 | 43 | u_int on = 0; |
44 | if (setsockopt (ospf6_sock, SOL_SOCKET, SO_REUSEADDR, &on, | |
45 | sizeof (u_int)) < 0) | |
46 | zlog_warn ("Network: set SO_REUSEADDR failed: %s", strerror (errno)); | |
718e3744 | 47 | } |
48 | ||
508e53e2 | 49 | /* setsockopt MulticastLoop to off */ |
718e3744 | 50 | void |
508e53e2 | 51 | ospf6_reset_mcastloop () |
718e3744 | 52 | { |
508e53e2 | 53 | u_int off = 0; |
54 | if (setsockopt (ospf6_sock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, | |
55 | &off, sizeof (u_int)) < 0) | |
56 | zlog_warn ("Network: reset IPV6_MULTICAST_LOOP failed: %s", | |
57 | strerror (errno)); | |
718e3744 | 58 | } |
59 | ||
60 | void | |
508e53e2 | 61 | ospf6_set_pktinfo () |
718e3744 | 62 | { |
79dc373a | 63 | setsockopt_ipv6_pktinfo (ospf6_sock, 1); |
718e3744 | 64 | } |
65 | ||
66 | void | |
508e53e2 | 67 | ospf6_set_checksum () |
718e3744 | 68 | { |
508e53e2 | 69 | int offset = 12; |
70 | #ifndef DISABLE_IPV6_CHECKSUM | |
71 | if (setsockopt (ospf6_sock, IPPROTO_IPV6, IPV6_CHECKSUM, | |
72 | &offset, sizeof (offset)) < 0) | |
73 | zlog_warn ("Network: set IPV6_CHECKSUM failed: %s", strerror (errno)); | |
74 | #else | |
75 | zlog_warn ("Network: Don't set IPV6_CHECKSUM"); | |
76 | #endif /* DISABLE_IPV6_CHECKSUM */ | |
718e3744 | 77 | } |
78 | ||
718e3744 | 79 | /* Make ospf6d's server socket. */ |
80 | int | |
81 | ospf6_serv_sock () | |
82 | { | |
edd7c245 | 83 | if (ospf6d_privs.change (ZPRIVS_RAISE)) |
508e53e2 | 84 | zlog_err ("ospf6_serv_sock: could not raise privs"); |
85 | ||
718e3744 | 86 | ospf6_sock = socket (AF_INET6, SOCK_RAW, IPPROTO_OSPFIGP); |
87 | if (ospf6_sock < 0) | |
88 | { | |
89 | zlog_warn ("Network: can't create OSPF6 socket."); | |
508e53e2 | 90 | if (ospf6d_privs.change (ZPRIVS_LOWER)) |
91 | zlog_err ("ospf_sock_init: could not lower privs"); | |
718e3744 | 92 | return -1; |
93 | } | |
edd7c245 | 94 | if (ospf6d_privs.change (ZPRIVS_LOWER)) |
95 | zlog_err ("ospf_sock_init: could not lower privs"); | |
508e53e2 | 96 | |
97 | /* set socket options */ | |
98 | #if 1 | |
99 | sockopt_reuseaddr (ospf6_sock); | |
100 | #else | |
101 | ospf6_set_reuseaddr (); | |
102 | #endif /*1*/ | |
103 | ospf6_reset_mcastloop (); | |
104 | ospf6_set_pktinfo (); | |
105 | ospf6_set_checksum (); | |
106 | ||
107 | /* setup global in6_addr, allspf6 and alldr6 for later use */ | |
108 | inet_pton (AF_INET6, ALLSPFROUTERS6, &allspfrouters6); | |
109 | inet_pton (AF_INET6, ALLDROUTERS6, &alldrouters6); | |
718e3744 | 110 | |
111 | return 0; | |
112 | } | |
113 | ||
508e53e2 | 114 | void |
718e3744 | 115 | ospf6_join_allspfrouters (u_int ifindex) |
116 | { | |
117 | struct ipv6_mreq mreq6; | |
118 | int retval; | |
119 | ||
120 | assert (ifindex); | |
121 | mreq6.ipv6mr_interface = ifindex; | |
508e53e2 | 122 | memcpy (&mreq6.ipv6mr_multiaddr, &allspfrouters6, |
718e3744 | 123 | sizeof (struct in6_addr)); |
124 | ||
125 | retval = setsockopt (ospf6_sock, IPPROTO_IPV6, IPV6_JOIN_GROUP, | |
126 | &mreq6, sizeof (mreq6)); | |
127 | ||
128 | if (retval < 0) | |
129 | zlog_err ("Network: Join AllSPFRouters on ifindex %d failed: %s", | |
508e53e2 | 130 | ifindex, strerror (errno)); |
718e3744 | 131 | #if 0 |
132 | else | |
133 | zlog_info ("Network: Join AllSPFRouters on ifindex %d", ifindex); | |
134 | #endif | |
718e3744 | 135 | } |
136 | ||
137 | void | |
138 | ospf6_leave_allspfrouters (u_int ifindex) | |
139 | { | |
140 | struct ipv6_mreq mreq6; | |
141 | ||
142 | assert (ifindex); | |
143 | mreq6.ipv6mr_interface = ifindex; | |
508e53e2 | 144 | memcpy (&mreq6.ipv6mr_multiaddr, &allspfrouters6, |
718e3744 | 145 | sizeof (struct in6_addr)); |
146 | ||
147 | if (setsockopt (ospf6_sock, IPPROTO_IPV6, IPV6_LEAVE_GROUP, | |
148 | &mreq6, sizeof (mreq6)) < 0) | |
149 | zlog_warn ("Network: Leave AllSPFRouters on ifindex %d Failed: %s", | |
150 | ifindex, strerror (errno)); | |
508e53e2 | 151 | #if 0 |
718e3744 | 152 | else |
153 | zlog_info ("Network: Leave AllSPFRouters on ifindex %d", ifindex); | |
508e53e2 | 154 | #endif |
718e3744 | 155 | } |
156 | ||
157 | void | |
158 | ospf6_join_alldrouters (u_int ifindex) | |
159 | { | |
160 | struct ipv6_mreq mreq6; | |
161 | ||
162 | assert (ifindex); | |
163 | mreq6.ipv6mr_interface = ifindex; | |
508e53e2 | 164 | memcpy (&mreq6.ipv6mr_multiaddr, &alldrouters6, |
718e3744 | 165 | sizeof (struct in6_addr)); |
166 | ||
167 | if (setsockopt (ospf6_sock, IPPROTO_IPV6, IPV6_JOIN_GROUP, | |
168 | &mreq6, sizeof (mreq6)) < 0) | |
169 | zlog_warn ("Network: Join AllDRouters on ifindex %d Failed: %s", | |
170 | ifindex, strerror (errno)); | |
508e53e2 | 171 | #if 0 |
718e3744 | 172 | else |
173 | zlog_info ("Network: Join AllDRouters on ifindex %d", ifindex); | |
508e53e2 | 174 | #endif |
718e3744 | 175 | } |
176 | ||
177 | void | |
178 | ospf6_leave_alldrouters (u_int ifindex) | |
179 | { | |
180 | struct ipv6_mreq mreq6; | |
181 | ||
182 | assert (ifindex); | |
183 | mreq6.ipv6mr_interface = ifindex; | |
508e53e2 | 184 | memcpy (&mreq6.ipv6mr_multiaddr, &alldrouters6, |
718e3744 | 185 | sizeof (struct in6_addr)); |
186 | ||
187 | if (setsockopt (ospf6_sock, IPPROTO_IPV6, IPV6_LEAVE_GROUP, | |
188 | &mreq6, sizeof (mreq6)) < 0) | |
189 | zlog_warn ("Network: Leave AllDRouters on ifindex %d Failed", ifindex); | |
508e53e2 | 190 | #if 0 |
718e3744 | 191 | else |
192 | zlog_info ("Network: Leave AllDRouters on ifindex %d", ifindex); | |
508e53e2 | 193 | #endif |
718e3744 | 194 | } |
195 | ||
508e53e2 | 196 | int |
197 | iov_count (struct iovec *iov) | |
718e3744 | 198 | { |
508e53e2 | 199 | int i; |
200 | for (i = 0; iov[i].iov_base; i++) | |
201 | ; | |
202 | return i; | |
718e3744 | 203 | } |
204 | ||
508e53e2 | 205 | int |
206 | iov_totallen (struct iovec *iov) | |
718e3744 | 207 | { |
508e53e2 | 208 | int i; |
209 | int totallen = 0; | |
210 | for (i = 0; iov[i].iov_base; i++) | |
211 | totallen += iov[i].iov_len; | |
212 | return totallen; | |
718e3744 | 213 | } |
214 | ||
508e53e2 | 215 | int |
718e3744 | 216 | ospf6_sendmsg (struct in6_addr *src, struct in6_addr *dst, |
217 | unsigned int *ifindex, struct iovec *message) | |
218 | { | |
219 | int retval; | |
220 | struct msghdr smsghdr; | |
221 | struct cmsghdr *scmsgp; | |
222 | u_char cmsgbuf[CMSG_SPACE(sizeof (struct in6_pktinfo))]; | |
223 | struct in6_pktinfo *pktinfo; | |
224 | struct sockaddr_in6 dst_sin6; | |
225 | ||
226 | assert (dst); | |
227 | assert (*ifindex); | |
228 | ||
229 | scmsgp = (struct cmsghdr *)cmsgbuf; | |
230 | pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp)); | |
231 | memset (&dst_sin6, 0, sizeof (struct sockaddr_in6)); | |
232 | ||
233 | /* source address */ | |
234 | pktinfo->ipi6_ifindex = *ifindex; | |
235 | if (src) | |
236 | memcpy (&pktinfo->ipi6_addr, src, sizeof (struct in6_addr)); | |
237 | else | |
238 | memset (&pktinfo->ipi6_addr, 0, sizeof (struct in6_addr)); | |
239 | ||
240 | /* destination address */ | |
241 | dst_sin6.sin6_family = AF_INET6; | |
242 | #ifdef SIN6_LEN | |
243 | dst_sin6.sin6_len = sizeof (struct sockaddr_in6); | |
244 | #endif /*SIN6_LEN*/ | |
245 | memcpy (&dst_sin6.sin6_addr, dst, sizeof (struct in6_addr)); | |
246 | #ifdef HAVE_SIN6_SCOPE_ID | |
247 | dst_sin6.sin6_scope_id = *ifindex; | |
248 | #endif | |
249 | ||
250 | /* send control msg */ | |
251 | scmsgp->cmsg_level = IPPROTO_IPV6; | |
252 | scmsgp->cmsg_type = IPV6_PKTINFO; | |
253 | scmsgp->cmsg_len = CMSG_LEN (sizeof (struct in6_pktinfo)); | |
254 | /* scmsgp = CMSG_NXTHDR (&smsghdr, scmsgp); */ | |
255 | ||
256 | /* send msg hdr */ | |
257 | smsghdr.msg_iov = message; | |
258 | smsghdr.msg_iovlen = iov_count (message); | |
259 | smsghdr.msg_name = (caddr_t) &dst_sin6; | |
260 | smsghdr.msg_namelen = sizeof (struct sockaddr_in6); | |
261 | smsghdr.msg_control = (caddr_t) cmsgbuf; | |
262 | smsghdr.msg_controllen = sizeof (cmsgbuf); | |
263 | ||
264 | retval = sendmsg (ospf6_sock, &smsghdr, 0); | |
265 | if (retval != iov_totallen (message)) | |
508e53e2 | 266 | zlog_warn ("sendmsg failed: ifindex: %d: %s (%d)", |
718e3744 | 267 | *ifindex, strerror (errno), errno); |
508e53e2 | 268 | |
269 | return retval; | |
718e3744 | 270 | } |
271 | ||
508e53e2 | 272 | int |
718e3744 | 273 | ospf6_recvmsg (struct in6_addr *src, struct in6_addr *dst, |
274 | unsigned int *ifindex, struct iovec *message) | |
275 | { | |
276 | int retval; | |
277 | struct msghdr rmsghdr; | |
278 | struct cmsghdr *rcmsgp; | |
279 | u_char cmsgbuf[CMSG_SPACE(sizeof (struct in6_pktinfo))]; | |
280 | struct in6_pktinfo *pktinfo; | |
281 | struct sockaddr_in6 src_sin6; | |
282 | ||
283 | rcmsgp = (struct cmsghdr *)cmsgbuf; | |
284 | pktinfo = (struct in6_pktinfo *)(CMSG_DATA(rcmsgp)); | |
285 | memset (&src_sin6, 0, sizeof (struct sockaddr_in6)); | |
286 | ||
287 | /* receive control msg */ | |
288 | rcmsgp->cmsg_level = IPPROTO_IPV6; | |
289 | rcmsgp->cmsg_type = IPV6_PKTINFO; | |
290 | rcmsgp->cmsg_len = CMSG_LEN (sizeof (struct in6_pktinfo)); | |
291 | /* rcmsgp = CMSG_NXTHDR (&rmsghdr, rcmsgp); */ | |
292 | ||
293 | /* receive msg hdr */ | |
294 | rmsghdr.msg_iov = message; | |
295 | rmsghdr.msg_iovlen = iov_count (message); | |
296 | rmsghdr.msg_name = (caddr_t) &src_sin6; | |
297 | rmsghdr.msg_namelen = sizeof (struct sockaddr_in6); | |
298 | rmsghdr.msg_control = (caddr_t) cmsgbuf; | |
299 | rmsghdr.msg_controllen = sizeof (cmsgbuf); | |
300 | ||
301 | retval = recvmsg (ospf6_sock, &rmsghdr, 0); | |
302 | if (retval < 0) | |
508e53e2 | 303 | zlog_warn ("recvmsg failed: %s", strerror (errno)); |
718e3744 | 304 | else if (retval == iov_totallen (message)) |
508e53e2 | 305 | zlog_warn ("recvmsg read full buffer size: %d", retval); |
718e3744 | 306 | |
307 | /* source address */ | |
308 | assert (src); | |
309 | memcpy (src, &src_sin6.sin6_addr, sizeof (struct in6_addr)); | |
310 | ||
311 | /* destination address */ | |
312 | if (ifindex) | |
313 | *ifindex = pktinfo->ipi6_ifindex; | |
314 | if (dst) | |
315 | memcpy (dst, &pktinfo->ipi6_addr, sizeof (struct in6_addr)); | |
718e3744 | 316 | |
508e53e2 | 317 | return retval; |
718e3744 | 318 | } |
319 | ||
508e53e2 | 320 |