paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1 | /* Kernel routing table updates using netlink over GNU/Linux system. |
| 2 | * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro |
| 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 Free |
| 18 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
| 19 | * 02111-1307, USA. |
| 20 | */ |
| 21 | |
| 22 | #include <zebra.h> |
| 23 | |
| 24 | /* Hack for GNU libc version 2. */ |
| 25 | #ifndef MSG_TRUNC |
| 26 | #define MSG_TRUNC 0x20 |
| 27 | #endif /* MSG_TRUNC */ |
| 28 | |
| 29 | #include "linklist.h" |
| 30 | #include "if.h" |
| 31 | #include "log.h" |
| 32 | #include "prefix.h" |
| 33 | #include "connected.h" |
| 34 | #include "table.h" |
| 35 | #include "rib.h" |
paul | e04ab74 | 2003-01-17 23:47:00 +0000 | [diff] [blame] | 36 | #include "thread.h" |
paul | edd7c24 | 2003-06-04 13:59:38 +0000 | [diff] [blame] | 37 | #include "privs.h" |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 38 | |
| 39 | #include "zebra/zserv.h" |
paul | 6621ca8 | 2005-11-23 13:02:08 +0000 | [diff] [blame] | 40 | #include "zebra/rt.h" |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 41 | #include "zebra/redistribute.h" |
| 42 | #include "zebra/interface.h" |
| 43 | #include "zebra/debug.h" |
| 44 | |
| 45 | /* Socket interface to kernel */ |
| 46 | struct nlsock |
| 47 | { |
| 48 | int sock; |
| 49 | int seq; |
| 50 | struct sockaddr_nl snl; |
hasso | fce954f | 2004-10-07 20:29:24 +0000 | [diff] [blame] | 51 | const char *name; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 52 | } netlink = { -1, 0, {0}, "netlink-listen"}, /* kernel messages */ |
hasso | 1ada819 | 2005-06-12 11:28:18 +0000 | [diff] [blame] | 53 | netlink_cmd = { -1, 0, {0}, "netlink-cmd"}; /* command channel */ |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 54 | |
Stephen Hemminger | 1423c80 | 2008-08-14 17:59:25 +0100 | [diff] [blame] | 55 | static const struct message nlmsg_str[] = { |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 56 | {RTM_NEWROUTE, "RTM_NEWROUTE"}, |
| 57 | {RTM_DELROUTE, "RTM_DELROUTE"}, |
| 58 | {RTM_GETROUTE, "RTM_GETROUTE"}, |
| 59 | {RTM_NEWLINK, "RTM_NEWLINK"}, |
| 60 | {RTM_DELLINK, "RTM_DELLINK"}, |
| 61 | {RTM_GETLINK, "RTM_GETLINK"}, |
| 62 | {RTM_NEWADDR, "RTM_NEWADDR"}, |
| 63 | {RTM_DELADDR, "RTM_DELADDR"}, |
| 64 | {RTM_GETADDR, "RTM_GETADDR"}, |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 65 | {0, NULL} |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 66 | }; |
| 67 | |
Stephen Hemminger | 6072b24 | 2008-08-14 16:52:26 +0100 | [diff] [blame] | 68 | static const char *nexthop_types_desc[] = |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 69 | { |
| 70 | "none", |
| 71 | "Directly connected", |
| 72 | "Interface route", |
| 73 | "IPv4 nexthop", |
| 74 | "IPv4 nexthop with ifindex", |
| 75 | "IPv4 nexthop with ifname", |
hasso | fa59980 | 2005-04-09 16:59:28 +0000 | [diff] [blame] | 76 | "IPv6 nexthop", |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 77 | "IPv6 nexthop with ifindex", |
| 78 | "IPv6 nexthop with ifname", |
| 79 | "Null0 nexthop", |
| 80 | }; |
| 81 | |
paul | b21b19c | 2003-06-15 01:28:29 +0000 | [diff] [blame] | 82 | extern struct zebra_t zebrad; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 83 | |
paul | edd7c24 | 2003-06-04 13:59:38 +0000 | [diff] [blame] | 84 | extern struct zebra_privs_t zserv_privs; |
| 85 | |
hasso | c34b6b5 | 2004-08-31 13:41:49 +0000 | [diff] [blame] | 86 | extern u_int32_t nl_rcvbufsize; |
| 87 | |
ajs | d2fc889 | 2005-04-02 18:38:43 +0000 | [diff] [blame] | 88 | /* Note: on netlink systems, there should be a 1-to-1 mapping between interface |
| 89 | names and ifindex values. */ |
| 90 | static void |
| 91 | set_ifindex(struct interface *ifp, unsigned int ifi_index) |
| 92 | { |
| 93 | struct interface *oifp; |
| 94 | |
| 95 | if (((oifp = if_lookup_by_index(ifi_index)) != NULL) && (oifp != ifp)) |
| 96 | { |
| 97 | if (ifi_index == IFINDEX_INTERNAL) |
| 98 | zlog_err("Netlink is setting interface %s ifindex to reserved " |
| 99 | "internal value %u", ifp->name, ifi_index); |
| 100 | else |
| 101 | { |
| 102 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 103 | zlog_debug("interface index %d was renamed from %s to %s", |
| 104 | ifi_index, oifp->name, ifp->name); |
| 105 | if (if_is_up(oifp)) |
| 106 | zlog_err("interface rename detected on up interface: index %d " |
| 107 | "was renamed from %s to %s, results are uncertain!", |
| 108 | ifi_index, oifp->name, ifp->name); |
| 109 | if_delete_update(oifp); |
| 110 | } |
| 111 | } |
| 112 | ifp->ifindex = ifi_index; |
| 113 | } |
| 114 | |
Stephen Hemminger | 30afea3 | 2008-08-16 18:25:47 +0100 | [diff] [blame] | 115 | static int |
| 116 | netlink_recvbuf (struct nlsock *nl, uint32_t newsize) |
| 117 | { |
| 118 | u_int32_t oldsize; |
| 119 | socklen_t newlen = sizeof(newsize); |
| 120 | socklen_t oldlen = sizeof(oldsize); |
| 121 | int ret; |
| 122 | |
| 123 | ret = getsockopt(nl->sock, SOL_SOCKET, SO_RCVBUF, &oldsize, &oldlen); |
| 124 | if (ret < 0) |
| 125 | { |
| 126 | zlog (NULL, LOG_ERR, "Can't get %s receive buffer size: %s", nl->name, |
| 127 | safe_strerror (errno)); |
| 128 | return -1; |
| 129 | } |
| 130 | |
| 131 | ret = setsockopt(nl->sock, SOL_SOCKET, SO_RCVBUF, &nl_rcvbufsize, |
| 132 | sizeof(nl_rcvbufsize)); |
| 133 | if (ret < 0) |
| 134 | { |
| 135 | zlog (NULL, LOG_ERR, "Can't set %s receive buffer size: %s", nl->name, |
| 136 | safe_strerror (errno)); |
| 137 | return -1; |
| 138 | } |
| 139 | |
| 140 | ret = getsockopt(nl->sock, SOL_SOCKET, SO_RCVBUF, &newsize, &newlen); |
| 141 | if (ret < 0) |
| 142 | { |
| 143 | zlog (NULL, LOG_ERR, "Can't get %s receive buffer size: %s", nl->name, |
| 144 | safe_strerror (errno)); |
| 145 | return -1; |
| 146 | } |
| 147 | |
| 148 | zlog (NULL, LOG_INFO, |
| 149 | "Setting netlink socket receive buffer size: %u -> %u", |
| 150 | oldsize, newsize); |
| 151 | return 0; |
| 152 | } |
| 153 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 154 | /* Make socket for Linux netlink interface. */ |
| 155 | static int |
| 156 | netlink_socket (struct nlsock *nl, unsigned long groups) |
| 157 | { |
| 158 | int ret; |
| 159 | struct sockaddr_nl snl; |
| 160 | int sock; |
| 161 | int namelen; |
ajs | 4be019d | 2005-01-29 16:12:41 +0000 | [diff] [blame] | 162 | int save_errno; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 163 | |
| 164 | sock = socket (AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); |
| 165 | if (sock < 0) |
| 166 | { |
| 167 | zlog (NULL, LOG_ERR, "Can't open %s socket: %s", nl->name, |
ajs | 6099b3b | 2004-11-20 02:06:59 +0000 | [diff] [blame] | 168 | safe_strerror (errno)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 169 | return -1; |
| 170 | } |
| 171 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 172 | memset (&snl, 0, sizeof snl); |
| 173 | snl.nl_family = AF_NETLINK; |
| 174 | snl.nl_groups = groups; |
| 175 | |
| 176 | /* Bind the socket to the netlink structure for anything. */ |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 177 | if (zserv_privs.change (ZPRIVS_RAISE)) |
| 178 | { |
| 179 | zlog (NULL, LOG_ERR, "Can't raise privileges"); |
| 180 | return -1; |
| 181 | } |
paul | edd7c24 | 2003-06-04 13:59:38 +0000 | [diff] [blame] | 182 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 183 | ret = bind (sock, (struct sockaddr *) &snl, sizeof snl); |
ajs | 4be019d | 2005-01-29 16:12:41 +0000 | [diff] [blame] | 184 | save_errno = errno; |
hasso | 55e7ecd | 2004-08-06 08:41:56 +0000 | [diff] [blame] | 185 | if (zserv_privs.change (ZPRIVS_LOWER)) |
| 186 | zlog (NULL, LOG_ERR, "Can't lower privileges"); |
| 187 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 188 | if (ret < 0) |
| 189 | { |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 190 | zlog (NULL, LOG_ERR, "Can't bind %s socket to group 0x%x: %s", |
ajs | 4be019d | 2005-01-29 16:12:41 +0000 | [diff] [blame] | 191 | nl->name, snl.nl_groups, safe_strerror (save_errno)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 192 | close (sock); |
| 193 | return -1; |
| 194 | } |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 195 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 196 | /* multiple netlink sockets will have different nl_pid */ |
| 197 | namelen = sizeof snl; |
hasso | c9e52be | 2004-09-26 16:09:34 +0000 | [diff] [blame] | 198 | ret = getsockname (sock, (struct sockaddr *) &snl, (socklen_t *) &namelen); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 199 | if (ret < 0 || namelen != sizeof snl) |
| 200 | { |
| 201 | zlog (NULL, LOG_ERR, "Can't get %s socket name: %s", nl->name, |
ajs | 6099b3b | 2004-11-20 02:06:59 +0000 | [diff] [blame] | 202 | safe_strerror (errno)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 203 | close (sock); |
| 204 | return -1; |
| 205 | } |
| 206 | |
| 207 | nl->snl = snl; |
| 208 | nl->sock = sock; |
| 209 | return ret; |
| 210 | } |
| 211 | |
| 212 | /* Get type specified information from netlink. */ |
| 213 | static int |
| 214 | netlink_request (int family, int type, struct nlsock *nl) |
| 215 | { |
| 216 | int ret; |
| 217 | struct sockaddr_nl snl; |
ajs | 4be019d | 2005-01-29 16:12:41 +0000 | [diff] [blame] | 218 | int save_errno; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 219 | |
| 220 | struct |
| 221 | { |
| 222 | struct nlmsghdr nlh; |
| 223 | struct rtgenmsg g; |
| 224 | } req; |
| 225 | |
| 226 | |
| 227 | /* Check netlink socket. */ |
| 228 | if (nl->sock < 0) |
| 229 | { |
| 230 | zlog (NULL, LOG_ERR, "%s socket isn't active.", nl->name); |
| 231 | return -1; |
| 232 | } |
| 233 | |
| 234 | memset (&snl, 0, sizeof snl); |
| 235 | snl.nl_family = AF_NETLINK; |
| 236 | |
ajs | c05612b | 2005-10-01 16:36:54 +0000 | [diff] [blame] | 237 | memset (&req, 0, sizeof req); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 238 | req.nlh.nlmsg_len = sizeof req; |
| 239 | req.nlh.nlmsg_type = type; |
| 240 | req.nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
Stephen Hemminger | 3d265b4 | 2008-08-16 17:30:39 +0100 | [diff] [blame] | 241 | req.nlh.nlmsg_pid = nl->snl.nl_pid; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 242 | req.nlh.nlmsg_seq = ++nl->seq; |
| 243 | req.g.rtgen_family = family; |
paul | edd7c24 | 2003-06-04 13:59:38 +0000 | [diff] [blame] | 244 | |
| 245 | /* linux appears to check capabilities on every message |
| 246 | * have to raise caps for every message sent |
| 247 | */ |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 248 | if (zserv_privs.change (ZPRIVS_RAISE)) |
paul | edd7c24 | 2003-06-04 13:59:38 +0000 | [diff] [blame] | 249 | { |
| 250 | zlog (NULL, LOG_ERR, "Can't raise privileges"); |
| 251 | return -1; |
| 252 | } |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 253 | |
| 254 | ret = sendto (nl->sock, (void *) &req, sizeof req, 0, |
| 255 | (struct sockaddr *) &snl, sizeof snl); |
ajs | 4be019d | 2005-01-29 16:12:41 +0000 | [diff] [blame] | 256 | save_errno = errno; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 257 | |
| 258 | if (zserv_privs.change (ZPRIVS_LOWER)) |
| 259 | zlog (NULL, LOG_ERR, "Can't lower privileges"); |
| 260 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 261 | if (ret < 0) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 262 | { |
| 263 | zlog (NULL, LOG_ERR, "%s sendto failed: %s", nl->name, |
ajs | 4be019d | 2005-01-29 16:12:41 +0000 | [diff] [blame] | 264 | safe_strerror (save_errno)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 265 | return -1; |
| 266 | } |
paul | edd7c24 | 2003-06-04 13:59:38 +0000 | [diff] [blame] | 267 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 268 | return 0; |
| 269 | } |
| 270 | |
| 271 | /* Receive message from netlink interface and pass those information |
| 272 | to the given function. */ |
| 273 | static int |
| 274 | netlink_parse_info (int (*filter) (struct sockaddr_nl *, struct nlmsghdr *), |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 275 | struct nlsock *nl) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 276 | { |
| 277 | int status; |
| 278 | int ret = 0; |
| 279 | int error; |
| 280 | |
| 281 | while (1) |
| 282 | { |
| 283 | char buf[4096]; |
| 284 | struct iovec iov = { buf, sizeof buf }; |
| 285 | struct sockaddr_nl snl; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 286 | struct msghdr msg = { (void *) &snl, sizeof snl, &iov, 1, NULL, 0, 0 }; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 287 | struct nlmsghdr *h; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 288 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 289 | status = recvmsg (nl->sock, &msg, 0); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 290 | if (status < 0) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 291 | { |
Stephen Hemminger | 4c69947 | 2008-08-17 17:01:44 +0100 | [diff] [blame] | 292 | if (errno == EINTR) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 293 | continue; |
Stephen Hemminger | 4c69947 | 2008-08-17 17:01:44 +0100 | [diff] [blame] | 294 | if (errno == EWOULDBLOCK || errno == EAGAIN) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 295 | break; |
ajs | 4be019d | 2005-01-29 16:12:41 +0000 | [diff] [blame] | 296 | zlog (NULL, LOG_ERR, "%s recvmsg overrun: %s", |
Stephen Hemminger | 4c69947 | 2008-08-17 17:01:44 +0100 | [diff] [blame] | 297 | nl->name, safe_strerror(errno)); |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 298 | continue; |
| 299 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 300 | |
| 301 | if (status == 0) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 302 | { |
| 303 | zlog (NULL, LOG_ERR, "%s EOF", nl->name); |
| 304 | return -1; |
| 305 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 306 | |
| 307 | if (msg.msg_namelen != sizeof snl) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 308 | { |
| 309 | zlog (NULL, LOG_ERR, "%s sender address length error: length %d", |
| 310 | nl->name, msg.msg_namelen); |
| 311 | return -1; |
| 312 | } |
paul | b84d3a1 | 2003-11-17 10:31:01 +0000 | [diff] [blame] | 313 | |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 314 | for (h = (struct nlmsghdr *) buf; NLMSG_OK (h, (unsigned int) status); |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 315 | h = NLMSG_NEXT (h, status)) |
| 316 | { |
| 317 | /* Finish of reading. */ |
| 318 | if (h->nlmsg_type == NLMSG_DONE) |
| 319 | return ret; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 320 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 321 | /* Error handling. */ |
| 322 | if (h->nlmsg_type == NLMSG_ERROR) |
| 323 | { |
| 324 | struct nlmsgerr *err = (struct nlmsgerr *) NLMSG_DATA (h); |
Stephen Hemminger | 898987e | 2008-08-17 16:56:15 +0100 | [diff] [blame] | 325 | int errnum = err->error; |
| 326 | int msg_type = err->msg.nlmsg_type; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 327 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 328 | /* If the error field is zero, then this is an ACK */ |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 329 | if (err->error == 0) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 330 | { |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 331 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 332 | { |
hasso | 1ada819 | 2005-06-12 11:28:18 +0000 | [diff] [blame] | 333 | zlog_debug ("%s: %s ACK: type=%s(%u), seq=%u, pid=%u", |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 334 | __FUNCTION__, nl->name, |
| 335 | lookup (nlmsg_str, err->msg.nlmsg_type), |
| 336 | err->msg.nlmsg_type, err->msg.nlmsg_seq, |
| 337 | err->msg.nlmsg_pid); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 338 | } |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 339 | |
| 340 | /* return if not a multipart message, otherwise continue */ |
| 341 | if (!(h->nlmsg_flags & NLM_F_MULTI)) |
| 342 | { |
| 343 | return 0; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 344 | } |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 345 | continue; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 346 | } |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 347 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 348 | if (h->nlmsg_len < NLMSG_LENGTH (sizeof (struct nlmsgerr))) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 349 | { |
| 350 | zlog (NULL, LOG_ERR, "%s error: message truncated", |
| 351 | nl->name); |
| 352 | return -1; |
| 353 | } |
paul | d753e9e | 2003-01-22 19:45:50 +0000 | [diff] [blame] | 354 | |
Stephen Hemminger | 898987e | 2008-08-17 16:56:15 +0100 | [diff] [blame] | 355 | /* Deal with errors that occur because of races in link handling */ |
| 356 | if (nl == &netlink_cmd |
| 357 | && ((msg_type == RTM_DELROUTE && |
| 358 | (-errnum == ENODEV || -errnum == ESRCH)) |
| 359 | || (msg_type == RTM_NEWROUTE && -errnum == EEXIST))) |
| 360 | { |
| 361 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 362 | zlog_debug ("%s: error: %s type=%s(%u), seq=%u, pid=%u", |
| 363 | nl->name, safe_strerror (-errnum), |
| 364 | lookup (nlmsg_str, msg_type), |
| 365 | msg_type, err->msg.nlmsg_seq, err->msg.nlmsg_pid); |
| 366 | return 0; |
| 367 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 368 | |
Stephen Hemminger | 898987e | 2008-08-17 16:56:15 +0100 | [diff] [blame] | 369 | zlog_err ("%s error: %s, type=%s(%u), seq=%u, pid=%u", |
| 370 | nl->name, safe_strerror (-errnum), |
| 371 | lookup (nlmsg_str, msg_type), |
| 372 | msg_type, err->msg.nlmsg_seq, err->msg.nlmsg_pid); |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 373 | return -1; |
| 374 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 375 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 376 | /* OK we got netlink message. */ |
| 377 | if (IS_ZEBRA_DEBUG_KERNEL) |
hasso | 1ada819 | 2005-06-12 11:28:18 +0000 | [diff] [blame] | 378 | zlog_debug ("netlink_parse_info: %s type %s(%u), seq=%u, pid=%u", |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 379 | nl->name, |
| 380 | lookup (nlmsg_str, h->nlmsg_type), h->nlmsg_type, |
| 381 | h->nlmsg_seq, h->nlmsg_pid); |
| 382 | |
| 383 | /* skip unsolicited messages originating from command socket */ |
| 384 | if (nl != &netlink_cmd && h->nlmsg_pid == netlink_cmd.snl.nl_pid) |
| 385 | { |
| 386 | if (IS_ZEBRA_DEBUG_KERNEL) |
ajs | b617800 | 2004-12-07 21:12:56 +0000 | [diff] [blame] | 387 | zlog_debug ("netlink_parse_info: %s packet comes from %s", |
hasso | 1ada819 | 2005-06-12 11:28:18 +0000 | [diff] [blame] | 388 | netlink_cmd.name, nl->name); |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 389 | continue; |
| 390 | } |
| 391 | |
| 392 | error = (*filter) (&snl, h); |
| 393 | if (error < 0) |
| 394 | { |
| 395 | zlog (NULL, LOG_ERR, "%s filter function error", nl->name); |
| 396 | ret = error; |
| 397 | } |
| 398 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 399 | |
| 400 | /* After error care. */ |
| 401 | if (msg.msg_flags & MSG_TRUNC) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 402 | { |
| 403 | zlog (NULL, LOG_ERR, "%s error: message truncated", nl->name); |
| 404 | continue; |
| 405 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 406 | if (status) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 407 | { |
| 408 | zlog (NULL, LOG_ERR, "%s error: data remnant size %d", nl->name, |
| 409 | status); |
| 410 | return -1; |
| 411 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 412 | } |
| 413 | return ret; |
| 414 | } |
| 415 | |
| 416 | /* Utility function for parse rtattr. */ |
| 417 | static void |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 418 | netlink_parse_rtattr (struct rtattr **tb, int max, struct rtattr *rta, |
| 419 | int len) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 420 | { |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 421 | while (RTA_OK (rta, len)) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 422 | { |
| 423 | if (rta->rta_type <= max) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 424 | tb[rta->rta_type] = rta; |
| 425 | rta = RTA_NEXT (rta, len); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 426 | } |
| 427 | } |
| 428 | |
| 429 | /* Called from interface_lookup_netlink(). This function is only used |
| 430 | during bootstrap. */ |
Stephen Hemminger | 6072b24 | 2008-08-14 16:52:26 +0100 | [diff] [blame] | 431 | static int |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 432 | netlink_interface (struct sockaddr_nl *snl, struct nlmsghdr *h) |
| 433 | { |
| 434 | int len; |
| 435 | struct ifinfomsg *ifi; |
| 436 | struct rtattr *tb[IFLA_MAX + 1]; |
| 437 | struct interface *ifp; |
| 438 | char *name; |
| 439 | int i; |
| 440 | |
| 441 | ifi = NLMSG_DATA (h); |
| 442 | |
| 443 | if (h->nlmsg_type != RTM_NEWLINK) |
| 444 | return 0; |
| 445 | |
| 446 | len = h->nlmsg_len - NLMSG_LENGTH (sizeof (struct ifinfomsg)); |
| 447 | if (len < 0) |
| 448 | return -1; |
| 449 | |
| 450 | /* Looking up interface name. */ |
| 451 | memset (tb, 0, sizeof tb); |
| 452 | netlink_parse_rtattr (tb, IFLA_MAX, IFLA_RTA (ifi), len); |
paul | c15cb24 | 2005-01-24 09:05:27 +0000 | [diff] [blame] | 453 | |
paul | 1e19315 | 2005-02-14 23:53:05 +0000 | [diff] [blame] | 454 | #ifdef IFLA_WIRELESS |
paul | c15cb24 | 2005-01-24 09:05:27 +0000 | [diff] [blame] | 455 | /* check for wireless messages to ignore */ |
| 456 | if ((tb[IFLA_WIRELESS] != NULL) && (ifi->ifi_change == 0)) |
| 457 | { |
| 458 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 459 | zlog_debug ("%s: ignoring IFLA_WIRELESS message", __func__); |
| 460 | return 0; |
| 461 | } |
paul | 1e19315 | 2005-02-14 23:53:05 +0000 | [diff] [blame] | 462 | #endif /* IFLA_WIRELESS */ |
paul | c15cb24 | 2005-01-24 09:05:27 +0000 | [diff] [blame] | 463 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 464 | if (tb[IFLA_IFNAME] == NULL) |
| 465 | return -1; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 466 | name = (char *) RTA_DATA (tb[IFLA_IFNAME]); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 467 | |
| 468 | /* Add interface. */ |
| 469 | ifp = if_get_by_name (name); |
ajs | d2fc889 | 2005-04-02 18:38:43 +0000 | [diff] [blame] | 470 | set_ifindex(ifp, ifi->ifi_index); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 471 | ifp->flags = ifi->ifi_flags & 0x0000fffff; |
Stephen Hemminger | 4308abb | 2008-12-01 14:19:38 -0800 | [diff] [blame] | 472 | ifp->mtu6 = ifp->mtu = *(uint32_t *) RTA_DATA (tb[IFLA_MTU]); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 473 | ifp->metric = 1; |
| 474 | |
| 475 | /* Hardware type and address. */ |
| 476 | ifp->hw_type = ifi->ifi_type; |
| 477 | |
| 478 | if (tb[IFLA_ADDRESS]) |
| 479 | { |
| 480 | int hw_addr_len; |
| 481 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 482 | hw_addr_len = RTA_PAYLOAD (tb[IFLA_ADDRESS]); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 483 | |
| 484 | if (hw_addr_len > INTERFACE_HWADDR_MAX) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 485 | zlog_warn ("Hardware address is too large: %d", hw_addr_len); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 486 | else |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 487 | { |
| 488 | ifp->hw_addr_len = hw_addr_len; |
| 489 | memcpy (ifp->hw_addr, RTA_DATA (tb[IFLA_ADDRESS]), hw_addr_len); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 490 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 491 | for (i = 0; i < hw_addr_len; i++) |
| 492 | if (ifp->hw_addr[i] != 0) |
| 493 | break; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 494 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 495 | if (i == hw_addr_len) |
| 496 | ifp->hw_addr_len = 0; |
| 497 | else |
| 498 | ifp->hw_addr_len = hw_addr_len; |
| 499 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 500 | } |
| 501 | |
| 502 | if_add_update (ifp); |
| 503 | |
| 504 | return 0; |
| 505 | } |
| 506 | |
| 507 | /* Lookup interface IPv4/IPv6 address. */ |
Stephen Hemminger | 6072b24 | 2008-08-14 16:52:26 +0100 | [diff] [blame] | 508 | static int |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 509 | netlink_interface_addr (struct sockaddr_nl *snl, struct nlmsghdr *h) |
| 510 | { |
| 511 | int len; |
| 512 | struct ifaddrmsg *ifa; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 513 | struct rtattr *tb[IFA_MAX + 1]; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 514 | struct interface *ifp; |
Andrew J. Schorr | e452963 | 2006-12-12 19:18:21 +0000 | [diff] [blame] | 515 | void *addr; |
| 516 | void *broad; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 517 | u_char flags = 0; |
| 518 | char *label = NULL; |
| 519 | |
| 520 | ifa = NLMSG_DATA (h); |
| 521 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 522 | if (ifa->ifa_family != AF_INET |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 523 | #ifdef HAVE_IPV6 |
| 524 | && ifa->ifa_family != AF_INET6 |
| 525 | #endif /* HAVE_IPV6 */ |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 526 | ) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 527 | return 0; |
| 528 | |
| 529 | if (h->nlmsg_type != RTM_NEWADDR && h->nlmsg_type != RTM_DELADDR) |
| 530 | return 0; |
| 531 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 532 | len = h->nlmsg_len - NLMSG_LENGTH (sizeof (struct ifaddrmsg)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 533 | if (len < 0) |
| 534 | return -1; |
| 535 | |
| 536 | memset (tb, 0, sizeof tb); |
| 537 | netlink_parse_rtattr (tb, IFA_MAX, IFA_RTA (ifa), len); |
| 538 | |
| 539 | ifp = if_lookup_by_index (ifa->ifa_index); |
| 540 | if (ifp == NULL) |
| 541 | { |
| 542 | zlog_err ("netlink_interface_addr can't find interface by index %d", |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 543 | ifa->ifa_index); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 544 | return -1; |
| 545 | } |
| 546 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 547 | if (IS_ZEBRA_DEBUG_KERNEL) /* remove this line to see initial ifcfg */ |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 548 | { |
paul | 00df0c1 | 2002-12-13 21:07:36 +0000 | [diff] [blame] | 549 | char buf[BUFSIZ]; |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 550 | zlog_debug ("netlink_interface_addr %s %s:", |
| 551 | lookup (nlmsg_str, h->nlmsg_type), ifp->name); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 552 | if (tb[IFA_LOCAL]) |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 553 | zlog_debug (" IFA_LOCAL %s/%d", |
| 554 | inet_ntop (ifa->ifa_family, RTA_DATA (tb[IFA_LOCAL]), |
| 555 | buf, BUFSIZ), ifa->ifa_prefixlen); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 556 | if (tb[IFA_ADDRESS]) |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 557 | zlog_debug (" IFA_ADDRESS %s/%d", |
| 558 | inet_ntop (ifa->ifa_family, RTA_DATA (tb[IFA_ADDRESS]), |
| 559 | buf, BUFSIZ), ifa->ifa_prefixlen); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 560 | if (tb[IFA_BROADCAST]) |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 561 | zlog_debug (" IFA_BROADCAST %s/%d", |
| 562 | inet_ntop (ifa->ifa_family, RTA_DATA (tb[IFA_BROADCAST]), |
| 563 | buf, BUFSIZ), ifa->ifa_prefixlen); |
paul | 00df0c1 | 2002-12-13 21:07:36 +0000 | [diff] [blame] | 564 | if (tb[IFA_LABEL] && strcmp (ifp->name, RTA_DATA (tb[IFA_LABEL]))) |
ajs | b617800 | 2004-12-07 21:12:56 +0000 | [diff] [blame] | 565 | zlog_debug (" IFA_LABEL %s", (char *)RTA_DATA (tb[IFA_LABEL])); |
paul | d34b899 | 2006-01-17 18:03:04 +0000 | [diff] [blame] | 566 | |
| 567 | if (tb[IFA_CACHEINFO]) |
| 568 | { |
| 569 | struct ifa_cacheinfo *ci = RTA_DATA (tb[IFA_CACHEINFO]); |
| 570 | zlog_debug (" IFA_CACHEINFO pref %d, valid %d", |
| 571 | ci->ifa_prefered, ci->ifa_valid); |
| 572 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 573 | } |
paul | 31a476c | 2003-09-29 19:54:53 +0000 | [diff] [blame] | 574 | |
Andrew J. Schorr | e452963 | 2006-12-12 19:18:21 +0000 | [diff] [blame] | 575 | /* logic copied from iproute2/ip/ipaddress.c:print_addrinfo() */ |
| 576 | if (tb[IFA_LOCAL] == NULL) |
| 577 | tb[IFA_LOCAL] = tb[IFA_ADDRESS]; |
paul | 31a476c | 2003-09-29 19:54:53 +0000 | [diff] [blame] | 578 | if (tb[IFA_ADDRESS] == NULL) |
| 579 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; |
| 580 | |
Andrew J. Schorr | e452963 | 2006-12-12 19:18:21 +0000 | [diff] [blame] | 581 | /* local interface address */ |
| 582 | addr = (tb[IFA_LOCAL] ? RTA_DATA(tb[IFA_LOCAL]) : NULL); |
| 583 | |
| 584 | /* is there a peer address? */ |
Andrew J. Schorr | e452963 | 2006-12-12 19:18:21 +0000 | [diff] [blame] | 585 | if (tb[IFA_ADDRESS] && |
vize | 068fd77 | 2007-08-10 06:25:20 +0000 | [diff] [blame] | 586 | memcmp(RTA_DATA(tb[IFA_ADDRESS]), RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_ADDRESS]))) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 587 | { |
Andrew J. Schorr | e452963 | 2006-12-12 19:18:21 +0000 | [diff] [blame] | 588 | broad = RTA_DATA(tb[IFA_ADDRESS]); |
| 589 | SET_FLAG (flags, ZEBRA_IFA_PEER); |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 590 | } |
paul | 31a476c | 2003-09-29 19:54:53 +0000 | [diff] [blame] | 591 | else |
Andrew J. Schorr | e452963 | 2006-12-12 19:18:21 +0000 | [diff] [blame] | 592 | /* seeking a broadcast address */ |
| 593 | broad = (tb[IFA_BROADCAST] ? RTA_DATA(tb[IFA_BROADCAST]) : NULL); |
paul | 00df0c1 | 2002-12-13 21:07:36 +0000 | [diff] [blame] | 594 | |
Paul Jakma | 27b4725 | 2006-07-02 16:38:54 +0000 | [diff] [blame] | 595 | /* addr is primary key, SOL if we don't have one */ |
| 596 | if (addr == NULL) |
| 597 | { |
| 598 | zlog_debug ("%s: NULL address", __func__); |
| 599 | return -1; |
| 600 | } |
| 601 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 602 | /* Flags. */ |
| 603 | if (ifa->ifa_flags & IFA_F_SECONDARY) |
| 604 | SET_FLAG (flags, ZEBRA_IFA_SECONDARY); |
| 605 | |
| 606 | /* Label */ |
| 607 | if (tb[IFA_LABEL]) |
| 608 | label = (char *) RTA_DATA (tb[IFA_LABEL]); |
| 609 | |
| 610 | if (ifp && label && strcmp (ifp->name, label) == 0) |
| 611 | label = NULL; |
| 612 | |
| 613 | /* Register interface address to the interface. */ |
| 614 | if (ifa->ifa_family == AF_INET) |
| 615 | { |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 616 | if (h->nlmsg_type == RTM_NEWADDR) |
| 617 | connected_add_ipv4 (ifp, flags, |
| 618 | (struct in_addr *) addr, ifa->ifa_prefixlen, |
| 619 | (struct in_addr *) broad, label); |
| 620 | else |
| 621 | connected_delete_ipv4 (ifp, flags, |
| 622 | (struct in_addr *) addr, ifa->ifa_prefixlen, |
paul | 0752ef0 | 2005-11-03 12:35:21 +0000 | [diff] [blame] | 623 | (struct in_addr *) broad); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 624 | } |
| 625 | #ifdef HAVE_IPV6 |
| 626 | if (ifa->ifa_family == AF_INET6) |
| 627 | { |
| 628 | if (h->nlmsg_type == RTM_NEWADDR) |
Andrew J. Schorr | e452963 | 2006-12-12 19:18:21 +0000 | [diff] [blame] | 629 | connected_add_ipv6 (ifp, flags, |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 630 | (struct in6_addr *) addr, ifa->ifa_prefixlen, |
paul | 0752ef0 | 2005-11-03 12:35:21 +0000 | [diff] [blame] | 631 | (struct in6_addr *) broad, label); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 632 | else |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 633 | connected_delete_ipv6 (ifp, |
| 634 | (struct in6_addr *) addr, ifa->ifa_prefixlen, |
| 635 | (struct in6_addr *) broad); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 636 | } |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 637 | #endif /* HAVE_IPV6 */ |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 638 | |
| 639 | return 0; |
| 640 | } |
| 641 | |
| 642 | /* Looking up routing table by netlink interface. */ |
Stephen Hemminger | 6072b24 | 2008-08-14 16:52:26 +0100 | [diff] [blame] | 643 | static int |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 644 | netlink_routing_table (struct sockaddr_nl *snl, struct nlmsghdr *h) |
| 645 | { |
| 646 | int len; |
| 647 | struct rtmsg *rtm; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 648 | struct rtattr *tb[RTA_MAX + 1]; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 649 | u_char flags = 0; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 650 | |
| 651 | char anyaddr[16] = { 0 }; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 652 | |
| 653 | int index; |
| 654 | int table; |
hasso | 34195bf | 2004-04-06 12:07:06 +0000 | [diff] [blame] | 655 | int metric; |
| 656 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 657 | void *dest; |
| 658 | void *gate; |
Paul Jakma | 7514fb7 | 2007-05-02 16:05:35 +0000 | [diff] [blame] | 659 | void *src; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 660 | |
| 661 | rtm = NLMSG_DATA (h); |
| 662 | |
| 663 | if (h->nlmsg_type != RTM_NEWROUTE) |
| 664 | return 0; |
| 665 | if (rtm->rtm_type != RTN_UNICAST) |
| 666 | return 0; |
| 667 | |
| 668 | table = rtm->rtm_table; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 669 | #if 0 /* we weed them out later in rib_weed_tables () */ |
paul | b21b19c | 2003-06-15 01:28:29 +0000 | [diff] [blame] | 670 | if (table != RT_TABLE_MAIN && table != zebrad.rtm_table_default) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 671 | return 0; |
| 672 | #endif |
| 673 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 674 | len = h->nlmsg_len - NLMSG_LENGTH (sizeof (struct rtmsg)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 675 | if (len < 0) |
| 676 | return -1; |
| 677 | |
| 678 | memset (tb, 0, sizeof tb); |
| 679 | netlink_parse_rtattr (tb, RTA_MAX, RTM_RTA (rtm), len); |
| 680 | |
| 681 | if (rtm->rtm_flags & RTM_F_CLONED) |
| 682 | return 0; |
| 683 | if (rtm->rtm_protocol == RTPROT_REDIRECT) |
| 684 | return 0; |
| 685 | if (rtm->rtm_protocol == RTPROT_KERNEL) |
| 686 | return 0; |
| 687 | |
| 688 | if (rtm->rtm_src_len != 0) |
| 689 | return 0; |
| 690 | |
| 691 | /* Route which inserted by Zebra. */ |
| 692 | if (rtm->rtm_protocol == RTPROT_ZEBRA) |
| 693 | flags |= ZEBRA_FLAG_SELFROUTE; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 694 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 695 | index = 0; |
hasso | 34195bf | 2004-04-06 12:07:06 +0000 | [diff] [blame] | 696 | metric = 0; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 697 | dest = NULL; |
| 698 | gate = NULL; |
Paul Jakma | 7514fb7 | 2007-05-02 16:05:35 +0000 | [diff] [blame] | 699 | src = NULL; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 700 | |
| 701 | if (tb[RTA_OIF]) |
| 702 | index = *(int *) RTA_DATA (tb[RTA_OIF]); |
| 703 | |
| 704 | if (tb[RTA_DST]) |
| 705 | dest = RTA_DATA (tb[RTA_DST]); |
| 706 | else |
| 707 | dest = anyaddr; |
| 708 | |
Paul Jakma | 7514fb7 | 2007-05-02 16:05:35 +0000 | [diff] [blame] | 709 | if (tb[RTA_PREFSRC]) |
| 710 | src = RTA_DATA (tb[RTA_PREFSRC]); |
| 711 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 712 | /* Multipath treatment is needed. */ |
| 713 | if (tb[RTA_GATEWAY]) |
| 714 | gate = RTA_DATA (tb[RTA_GATEWAY]); |
| 715 | |
hasso | 34195bf | 2004-04-06 12:07:06 +0000 | [diff] [blame] | 716 | if (tb[RTA_PRIORITY]) |
| 717 | metric = *(int *) RTA_DATA(tb[RTA_PRIORITY]); |
| 718 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 719 | if (rtm->rtm_family == AF_INET) |
| 720 | { |
| 721 | struct prefix_ipv4 p; |
| 722 | p.family = AF_INET; |
| 723 | memcpy (&p.prefix, dest, 4); |
| 724 | p.prefixlen = rtm->rtm_dst_len; |
| 725 | |
Paul Jakma | 7514fb7 | 2007-05-02 16:05:35 +0000 | [diff] [blame] | 726 | rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, flags, &p, gate, src, index, table, metric, 0); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 727 | } |
| 728 | #ifdef HAVE_IPV6 |
| 729 | if (rtm->rtm_family == AF_INET6) |
| 730 | { |
| 731 | struct prefix_ipv6 p; |
| 732 | p.family = AF_INET6; |
| 733 | memcpy (&p.prefix, dest, 16); |
| 734 | p.prefixlen = rtm->rtm_dst_len; |
| 735 | |
hasso | be61c4e | 2005-08-27 06:05:47 +0000 | [diff] [blame] | 736 | rib_add_ipv6 (ZEBRA_ROUTE_KERNEL, flags, &p, gate, index, table, |
| 737 | metric, 0); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 738 | } |
| 739 | #endif /* HAVE_IPV6 */ |
| 740 | |
| 741 | return 0; |
| 742 | } |
| 743 | |
Stephen Hemminger | 1423c80 | 2008-08-14 17:59:25 +0100 | [diff] [blame] | 744 | static const struct message rtproto_str[] = { |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 745 | {RTPROT_REDIRECT, "redirect"}, |
| 746 | {RTPROT_KERNEL, "kernel"}, |
| 747 | {RTPROT_BOOT, "boot"}, |
| 748 | {RTPROT_STATIC, "static"}, |
| 749 | {RTPROT_GATED, "GateD"}, |
| 750 | {RTPROT_RA, "router advertisement"}, |
| 751 | {RTPROT_MRT, "MRT"}, |
| 752 | {RTPROT_ZEBRA, "Zebra"}, |
| 753 | #ifdef RTPROT_BIRD |
| 754 | {RTPROT_BIRD, "BIRD"}, |
| 755 | #endif /* RTPROT_BIRD */ |
| 756 | {0, NULL} |
| 757 | }; |
| 758 | |
| 759 | /* Routing information change from the kernel. */ |
Stephen Hemminger | 6072b24 | 2008-08-14 16:52:26 +0100 | [diff] [blame] | 760 | static int |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 761 | netlink_route_change (struct sockaddr_nl *snl, struct nlmsghdr *h) |
| 762 | { |
| 763 | int len; |
| 764 | struct rtmsg *rtm; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 765 | struct rtattr *tb[RTA_MAX + 1]; |
| 766 | |
| 767 | char anyaddr[16] = { 0 }; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 768 | |
| 769 | int index; |
| 770 | int table; |
| 771 | void *dest; |
| 772 | void *gate; |
Paul Jakma | 7514fb7 | 2007-05-02 16:05:35 +0000 | [diff] [blame] | 773 | void *src; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 774 | |
| 775 | rtm = NLMSG_DATA (h); |
| 776 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 777 | if (!(h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 778 | { |
| 779 | /* If this is not route add/delete message print warning. */ |
| 780 | zlog_warn ("Kernel message: %d\n", h->nlmsg_type); |
| 781 | return 0; |
| 782 | } |
| 783 | |
| 784 | /* Connected route. */ |
| 785 | if (IS_ZEBRA_DEBUG_KERNEL) |
ajs | b617800 | 2004-12-07 21:12:56 +0000 | [diff] [blame] | 786 | zlog_debug ("%s %s %s proto %s", |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 787 | h->nlmsg_type == |
| 788 | RTM_NEWROUTE ? "RTM_NEWROUTE" : "RTM_DELROUTE", |
| 789 | rtm->rtm_family == AF_INET ? "ipv4" : "ipv6", |
| 790 | rtm->rtm_type == RTN_UNICAST ? "unicast" : "multicast", |
| 791 | lookup (rtproto_str, rtm->rtm_protocol)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 792 | |
| 793 | if (rtm->rtm_type != RTN_UNICAST) |
| 794 | { |
| 795 | return 0; |
| 796 | } |
| 797 | |
| 798 | table = rtm->rtm_table; |
paul | b21b19c | 2003-06-15 01:28:29 +0000 | [diff] [blame] | 799 | if (table != RT_TABLE_MAIN && table != zebrad.rtm_table_default) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 800 | { |
| 801 | return 0; |
| 802 | } |
| 803 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 804 | len = h->nlmsg_len - NLMSG_LENGTH (sizeof (struct rtmsg)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 805 | if (len < 0) |
| 806 | return -1; |
| 807 | |
| 808 | memset (tb, 0, sizeof tb); |
| 809 | netlink_parse_rtattr (tb, RTA_MAX, RTM_RTA (rtm), len); |
| 810 | |
| 811 | if (rtm->rtm_flags & RTM_F_CLONED) |
| 812 | return 0; |
| 813 | if (rtm->rtm_protocol == RTPROT_REDIRECT) |
| 814 | return 0; |
| 815 | if (rtm->rtm_protocol == RTPROT_KERNEL) |
| 816 | return 0; |
| 817 | |
| 818 | if (rtm->rtm_protocol == RTPROT_ZEBRA && h->nlmsg_type == RTM_NEWROUTE) |
| 819 | return 0; |
| 820 | |
| 821 | if (rtm->rtm_src_len != 0) |
| 822 | { |
| 823 | zlog_warn ("netlink_route_change(): no src len"); |
| 824 | return 0; |
| 825 | } |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 826 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 827 | index = 0; |
| 828 | dest = NULL; |
| 829 | gate = NULL; |
Paul Jakma | 7514fb7 | 2007-05-02 16:05:35 +0000 | [diff] [blame] | 830 | src = NULL; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 831 | |
| 832 | if (tb[RTA_OIF]) |
| 833 | index = *(int *) RTA_DATA (tb[RTA_OIF]); |
| 834 | |
| 835 | if (tb[RTA_DST]) |
| 836 | dest = RTA_DATA (tb[RTA_DST]); |
| 837 | else |
| 838 | dest = anyaddr; |
| 839 | |
| 840 | if (tb[RTA_GATEWAY]) |
| 841 | gate = RTA_DATA (tb[RTA_GATEWAY]); |
| 842 | |
Paul Jakma | 7514fb7 | 2007-05-02 16:05:35 +0000 | [diff] [blame] | 843 | if (tb[RTA_PREFSRC]) |
| 844 | src = RTA_DATA (tb[RTA_PREFSRC]); |
| 845 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 846 | if (rtm->rtm_family == AF_INET) |
| 847 | { |
| 848 | struct prefix_ipv4 p; |
| 849 | p.family = AF_INET; |
| 850 | memcpy (&p.prefix, dest, 4); |
| 851 | p.prefixlen = rtm->rtm_dst_len; |
| 852 | |
| 853 | if (IS_ZEBRA_DEBUG_KERNEL) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 854 | { |
| 855 | if (h->nlmsg_type == RTM_NEWROUTE) |
ajs | b617800 | 2004-12-07 21:12:56 +0000 | [diff] [blame] | 856 | zlog_debug ("RTM_NEWROUTE %s/%d", |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 857 | inet_ntoa (p.prefix), p.prefixlen); |
| 858 | else |
ajs | b617800 | 2004-12-07 21:12:56 +0000 | [diff] [blame] | 859 | zlog_debug ("RTM_DELROUTE %s/%d", |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 860 | inet_ntoa (p.prefix), p.prefixlen); |
| 861 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 862 | |
| 863 | if (h->nlmsg_type == RTM_NEWROUTE) |
Paul Jakma | 7514fb7 | 2007-05-02 16:05:35 +0000 | [diff] [blame] | 864 | rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, 0, &p, gate, src, index, table, 0, 0); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 865 | else |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 866 | rib_delete_ipv4 (ZEBRA_ROUTE_KERNEL, 0, &p, gate, index, table); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 867 | } |
| 868 | |
| 869 | #ifdef HAVE_IPV6 |
| 870 | if (rtm->rtm_family == AF_INET6) |
| 871 | { |
| 872 | struct prefix_ipv6 p; |
| 873 | char buf[BUFSIZ]; |
| 874 | |
| 875 | p.family = AF_INET6; |
| 876 | memcpy (&p.prefix, dest, 16); |
| 877 | p.prefixlen = rtm->rtm_dst_len; |
| 878 | |
| 879 | if (IS_ZEBRA_DEBUG_KERNEL) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 880 | { |
| 881 | if (h->nlmsg_type == RTM_NEWROUTE) |
ajs | b617800 | 2004-12-07 21:12:56 +0000 | [diff] [blame] | 882 | zlog_debug ("RTM_NEWROUTE %s/%d", |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 883 | inet_ntop (AF_INET6, &p.prefix, buf, BUFSIZ), |
| 884 | p.prefixlen); |
| 885 | else |
ajs | b617800 | 2004-12-07 21:12:56 +0000 | [diff] [blame] | 886 | zlog_debug ("RTM_DELROUTE %s/%d", |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 887 | inet_ntop (AF_INET6, &p.prefix, buf, BUFSIZ), |
| 888 | p.prefixlen); |
| 889 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 890 | |
| 891 | if (h->nlmsg_type == RTM_NEWROUTE) |
Mathieu Goessens | d13c3b4 | 2009-06-23 15:59:45 +0100 | [diff] [blame] | 892 | rib_add_ipv6 (ZEBRA_ROUTE_KERNEL, 0, &p, gate, index, table, 0, 0); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 893 | else |
Mathieu Goessens | d13c3b4 | 2009-06-23 15:59:45 +0100 | [diff] [blame] | 894 | rib_delete_ipv6 (ZEBRA_ROUTE_KERNEL, 0, &p, gate, index, table); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 895 | } |
| 896 | #endif /* HAVE_IPV6 */ |
| 897 | |
| 898 | return 0; |
| 899 | } |
| 900 | |
Stephen Hemminger | 6072b24 | 2008-08-14 16:52:26 +0100 | [diff] [blame] | 901 | static int |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 902 | netlink_link_change (struct sockaddr_nl *snl, struct nlmsghdr *h) |
| 903 | { |
| 904 | int len; |
| 905 | struct ifinfomsg *ifi; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 906 | struct rtattr *tb[IFLA_MAX + 1]; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 907 | struct interface *ifp; |
| 908 | char *name; |
| 909 | |
| 910 | ifi = NLMSG_DATA (h); |
| 911 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 912 | if (!(h->nlmsg_type == RTM_NEWLINK || h->nlmsg_type == RTM_DELLINK)) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 913 | { |
| 914 | /* If this is not link add/delete message so print warning. */ |
| 915 | zlog_warn ("netlink_link_change: wrong kernel message %d\n", |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 916 | h->nlmsg_type); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 917 | return 0; |
| 918 | } |
| 919 | |
| 920 | len = h->nlmsg_len - NLMSG_LENGTH (sizeof (struct ifinfomsg)); |
| 921 | if (len < 0) |
| 922 | return -1; |
| 923 | |
| 924 | /* Looking up interface name. */ |
| 925 | memset (tb, 0, sizeof tb); |
| 926 | netlink_parse_rtattr (tb, IFLA_MAX, IFLA_RTA (ifi), len); |
paul | c15cb24 | 2005-01-24 09:05:27 +0000 | [diff] [blame] | 927 | |
paul | 1e19315 | 2005-02-14 23:53:05 +0000 | [diff] [blame] | 928 | #ifdef IFLA_WIRELESS |
paul | c15cb24 | 2005-01-24 09:05:27 +0000 | [diff] [blame] | 929 | /* check for wireless messages to ignore */ |
| 930 | if ((tb[IFLA_WIRELESS] != NULL) && (ifi->ifi_change == 0)) |
| 931 | { |
| 932 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 933 | zlog_debug ("%s: ignoring IFLA_WIRELESS message", __func__); |
| 934 | return 0; |
| 935 | } |
paul | 1e19315 | 2005-02-14 23:53:05 +0000 | [diff] [blame] | 936 | #endif /* IFLA_WIRELESS */ |
paul | c15cb24 | 2005-01-24 09:05:27 +0000 | [diff] [blame] | 937 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 938 | if (tb[IFLA_IFNAME] == NULL) |
| 939 | return -1; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 940 | name = (char *) RTA_DATA (tb[IFLA_IFNAME]); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 941 | |
| 942 | /* Add interface. */ |
| 943 | if (h->nlmsg_type == RTM_NEWLINK) |
| 944 | { |
| 945 | ifp = if_lookup_by_name (name); |
| 946 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 947 | if (ifp == NULL || !CHECK_FLAG (ifp->status, ZEBRA_INTERFACE_ACTIVE)) |
| 948 | { |
| 949 | if (ifp == NULL) |
| 950 | ifp = if_get_by_name (name); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 951 | |
ajs | d2fc889 | 2005-04-02 18:38:43 +0000 | [diff] [blame] | 952 | set_ifindex(ifp, ifi->ifi_index); |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 953 | ifp->flags = ifi->ifi_flags & 0x0000fffff; |
paul | 44145db | 2004-05-09 11:00:23 +0000 | [diff] [blame] | 954 | ifp->mtu6 = ifp->mtu = *(int *) RTA_DATA (tb[IFLA_MTU]); |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 955 | ifp->metric = 1; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 956 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 957 | /* If new link is added. */ |
| 958 | if_add_update (ifp); |
| 959 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 960 | else |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 961 | { |
| 962 | /* Interface status change. */ |
ajs | d2fc889 | 2005-04-02 18:38:43 +0000 | [diff] [blame] | 963 | set_ifindex(ifp, ifi->ifi_index); |
paul | 44145db | 2004-05-09 11:00:23 +0000 | [diff] [blame] | 964 | ifp->mtu6 = ifp->mtu = *(int *) RTA_DATA (tb[IFLA_MTU]); |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 965 | ifp->metric = 1; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 966 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 967 | if (if_is_operative (ifp)) |
| 968 | { |
| 969 | ifp->flags = ifi->ifi_flags & 0x0000fffff; |
| 970 | if (!if_is_operative (ifp)) |
| 971 | if_down (ifp); |
ajs | a608bbf | 2005-03-29 17:03:49 +0000 | [diff] [blame] | 972 | else |
| 973 | /* Must notify client daemons of new interface status. */ |
| 974 | zebra_interface_up_update (ifp); |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 975 | } |
| 976 | else |
| 977 | { |
| 978 | ifp->flags = ifi->ifi_flags & 0x0000fffff; |
| 979 | if (if_is_operative (ifp)) |
| 980 | if_up (ifp); |
| 981 | } |
| 982 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 983 | } |
| 984 | else |
| 985 | { |
| 986 | /* RTM_DELLINK. */ |
| 987 | ifp = if_lookup_by_name (name); |
| 988 | |
| 989 | if (ifp == NULL) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 990 | { |
| 991 | zlog (NULL, LOG_WARNING, "interface %s is deleted but can't find", |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 992 | name); |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 993 | return 0; |
| 994 | } |
| 995 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 996 | if_delete_update (ifp); |
| 997 | } |
| 998 | |
| 999 | return 0; |
| 1000 | } |
| 1001 | |
Stephen Hemminger | 6072b24 | 2008-08-14 16:52:26 +0100 | [diff] [blame] | 1002 | static int |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1003 | netlink_information_fetch (struct sockaddr_nl *snl, struct nlmsghdr *h) |
| 1004 | { |
Stephen Hemminger | 3d265b4 | 2008-08-16 17:30:39 +0100 | [diff] [blame] | 1005 | /* JF: Ignore messages that aren't from the kernel */ |
| 1006 | if ( snl->nl_pid != 0 ) |
| 1007 | { |
| 1008 | zlog ( NULL, LOG_ERR, "Ignoring message from pid %u", snl->nl_pid ); |
| 1009 | return 0; |
| 1010 | } |
| 1011 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1012 | switch (h->nlmsg_type) |
| 1013 | { |
| 1014 | case RTM_NEWROUTE: |
| 1015 | return netlink_route_change (snl, h); |
| 1016 | break; |
| 1017 | case RTM_DELROUTE: |
| 1018 | return netlink_route_change (snl, h); |
| 1019 | break; |
| 1020 | case RTM_NEWLINK: |
| 1021 | return netlink_link_change (snl, h); |
| 1022 | break; |
| 1023 | case RTM_DELLINK: |
| 1024 | return netlink_link_change (snl, h); |
| 1025 | break; |
| 1026 | case RTM_NEWADDR: |
| 1027 | return netlink_interface_addr (snl, h); |
| 1028 | break; |
| 1029 | case RTM_DELADDR: |
| 1030 | return netlink_interface_addr (snl, h); |
| 1031 | break; |
| 1032 | default: |
| 1033 | zlog_warn ("Unknown netlink nlmsg_type %d\n", h->nlmsg_type); |
| 1034 | break; |
| 1035 | } |
| 1036 | return 0; |
| 1037 | } |
| 1038 | |
| 1039 | /* Interface lookup by netlink socket. */ |
| 1040 | int |
paul | 6621ca8 | 2005-11-23 13:02:08 +0000 | [diff] [blame] | 1041 | interface_lookup_netlink (void) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1042 | { |
| 1043 | int ret; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1044 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1045 | /* Get interface information. */ |
| 1046 | ret = netlink_request (AF_PACKET, RTM_GETLINK, &netlink_cmd); |
| 1047 | if (ret < 0) |
| 1048 | return ret; |
| 1049 | ret = netlink_parse_info (netlink_interface, &netlink_cmd); |
| 1050 | if (ret < 0) |
| 1051 | return ret; |
| 1052 | |
| 1053 | /* Get IPv4 address of the interfaces. */ |
| 1054 | ret = netlink_request (AF_INET, RTM_GETADDR, &netlink_cmd); |
| 1055 | if (ret < 0) |
| 1056 | return ret; |
| 1057 | ret = netlink_parse_info (netlink_interface_addr, &netlink_cmd); |
| 1058 | if (ret < 0) |
| 1059 | return ret; |
| 1060 | |
| 1061 | #ifdef HAVE_IPV6 |
| 1062 | /* Get IPv6 address of the interfaces. */ |
| 1063 | ret = netlink_request (AF_INET6, RTM_GETADDR, &netlink_cmd); |
| 1064 | if (ret < 0) |
| 1065 | return ret; |
| 1066 | ret = netlink_parse_info (netlink_interface_addr, &netlink_cmd); |
| 1067 | if (ret < 0) |
| 1068 | return ret; |
| 1069 | #endif /* HAVE_IPV6 */ |
| 1070 | |
| 1071 | return 0; |
| 1072 | } |
| 1073 | |
| 1074 | /* Routing table read function using netlink interface. Only called |
| 1075 | bootstrap time. */ |
| 1076 | int |
paul | 6621ca8 | 2005-11-23 13:02:08 +0000 | [diff] [blame] | 1077 | netlink_route_read (void) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1078 | { |
| 1079 | int ret; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1080 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1081 | /* Get IPv4 routing table. */ |
| 1082 | ret = netlink_request (AF_INET, RTM_GETROUTE, &netlink_cmd); |
| 1083 | if (ret < 0) |
| 1084 | return ret; |
| 1085 | ret = netlink_parse_info (netlink_routing_table, &netlink_cmd); |
| 1086 | if (ret < 0) |
| 1087 | return ret; |
| 1088 | |
| 1089 | #ifdef HAVE_IPV6 |
| 1090 | /* Get IPv6 routing table. */ |
| 1091 | ret = netlink_request (AF_INET6, RTM_GETROUTE, &netlink_cmd); |
| 1092 | if (ret < 0) |
| 1093 | return ret; |
| 1094 | ret = netlink_parse_info (netlink_routing_table, &netlink_cmd); |
| 1095 | if (ret < 0) |
| 1096 | return ret; |
| 1097 | #endif /* HAVE_IPV6 */ |
| 1098 | |
| 1099 | return 0; |
| 1100 | } |
| 1101 | |
| 1102 | /* Utility function comes from iproute2. |
| 1103 | Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> */ |
Stephen Hemminger | 6072b24 | 2008-08-14 16:52:26 +0100 | [diff] [blame] | 1104 | static int |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1105 | addattr_l (struct nlmsghdr *n, int maxlen, int type, void *data, int alen) |
| 1106 | { |
| 1107 | int len; |
| 1108 | struct rtattr *rta; |
| 1109 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1110 | len = RTA_LENGTH (alen); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1111 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1112 | if (NLMSG_ALIGN (n->nlmsg_len) + len > maxlen) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1113 | return -1; |
| 1114 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1115 | rta = (struct rtattr *) (((char *) n) + NLMSG_ALIGN (n->nlmsg_len)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1116 | rta->rta_type = type; |
| 1117 | rta->rta_len = len; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1118 | memcpy (RTA_DATA (rta), data, alen); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1119 | n->nlmsg_len = NLMSG_ALIGN (n->nlmsg_len) + len; |
| 1120 | |
| 1121 | return 0; |
| 1122 | } |
| 1123 | |
Stephen Hemminger | 6072b24 | 2008-08-14 16:52:26 +0100 | [diff] [blame] | 1124 | static int |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1125 | rta_addattr_l (struct rtattr *rta, int maxlen, int type, void *data, int alen) |
| 1126 | { |
| 1127 | int len; |
| 1128 | struct rtattr *subrta; |
| 1129 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1130 | len = RTA_LENGTH (alen); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1131 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1132 | if (RTA_ALIGN (rta->rta_len) + len > maxlen) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1133 | return -1; |
| 1134 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1135 | subrta = (struct rtattr *) (((char *) rta) + RTA_ALIGN (rta->rta_len)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1136 | subrta->rta_type = type; |
| 1137 | subrta->rta_len = len; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1138 | memcpy (RTA_DATA (subrta), data, alen); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1139 | rta->rta_len = NLMSG_ALIGN (rta->rta_len) + len; |
| 1140 | |
| 1141 | return 0; |
| 1142 | } |
| 1143 | |
| 1144 | /* Utility function comes from iproute2. |
| 1145 | Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> */ |
Stephen Hemminger | 6072b24 | 2008-08-14 16:52:26 +0100 | [diff] [blame] | 1146 | static int |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1147 | addattr32 (struct nlmsghdr *n, int maxlen, int type, int data) |
| 1148 | { |
| 1149 | int len; |
| 1150 | struct rtattr *rta; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1151 | |
| 1152 | len = RTA_LENGTH (4); |
| 1153 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1154 | if (NLMSG_ALIGN (n->nlmsg_len) + len > maxlen) |
| 1155 | return -1; |
| 1156 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1157 | rta = (struct rtattr *) (((char *) n) + NLMSG_ALIGN (n->nlmsg_len)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1158 | rta->rta_type = type; |
| 1159 | rta->rta_len = len; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1160 | memcpy (RTA_DATA (rta), &data, 4); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1161 | n->nlmsg_len = NLMSG_ALIGN (n->nlmsg_len) + len; |
| 1162 | |
| 1163 | return 0; |
| 1164 | } |
| 1165 | |
| 1166 | static int |
| 1167 | netlink_talk_filter (struct sockaddr_nl *snl, struct nlmsghdr *h) |
| 1168 | { |
hasso | b7ed1ec | 2005-03-31 20:13:49 +0000 | [diff] [blame] | 1169 | zlog_warn ("netlink_talk: ignoring message type 0x%04x", h->nlmsg_type); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1170 | return 0; |
| 1171 | } |
| 1172 | |
| 1173 | /* sendmsg() to netlink socket then recvmsg(). */ |
Stephen Hemminger | 6072b24 | 2008-08-14 16:52:26 +0100 | [diff] [blame] | 1174 | static int |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1175 | netlink_talk (struct nlmsghdr *n, struct nlsock *nl) |
| 1176 | { |
| 1177 | int status; |
| 1178 | struct sockaddr_nl snl; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1179 | struct iovec iov = { (void *) n, n->nlmsg_len }; |
| 1180 | struct msghdr msg = { (void *) &snl, sizeof snl, &iov, 1, NULL, 0, 0 }; |
ajs | 4be019d | 2005-01-29 16:12:41 +0000 | [diff] [blame] | 1181 | int save_errno; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1182 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1183 | memset (&snl, 0, sizeof snl); |
| 1184 | snl.nl_family = AF_NETLINK; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1185 | |
hasso | b7ed1ec | 2005-03-31 20:13:49 +0000 | [diff] [blame] | 1186 | n->nlmsg_seq = ++nl->seq; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1187 | |
| 1188 | /* Request an acknowledgement by setting NLM_F_ACK */ |
| 1189 | n->nlmsg_flags |= NLM_F_ACK; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1190 | |
| 1191 | if (IS_ZEBRA_DEBUG_KERNEL) |
hasso | b7ed1ec | 2005-03-31 20:13:49 +0000 | [diff] [blame] | 1192 | zlog_debug ("netlink_talk: %s type %s(%u), seq=%u", nl->name, |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1193 | lookup (nlmsg_str, n->nlmsg_type), n->nlmsg_type, |
| 1194 | n->nlmsg_seq); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1195 | |
| 1196 | /* Send message to netlink interface. */ |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1197 | if (zserv_privs.change (ZPRIVS_RAISE)) |
| 1198 | zlog (NULL, LOG_ERR, "Can't raise privileges"); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1199 | status = sendmsg (nl->sock, &msg, 0); |
ajs | 4be019d | 2005-01-29 16:12:41 +0000 | [diff] [blame] | 1200 | save_errno = errno; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1201 | if (zserv_privs.change (ZPRIVS_LOWER)) |
| 1202 | zlog (NULL, LOG_ERR, "Can't lower privileges"); |
| 1203 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1204 | if (status < 0) |
| 1205 | { |
| 1206 | zlog (NULL, LOG_ERR, "netlink_talk sendmsg() error: %s", |
ajs | 4be019d | 2005-01-29 16:12:41 +0000 | [diff] [blame] | 1207 | safe_strerror (save_errno)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1208 | return -1; |
| 1209 | } |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1210 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1211 | |
| 1212 | /* |
| 1213 | * Get reply from netlink socket. |
| 1214 | * The reply should either be an acknowlegement or an error. |
| 1215 | */ |
Stephen Hemminger | 4cde931 | 2008-08-16 17:51:27 +0100 | [diff] [blame] | 1216 | return netlink_parse_info (netlink_talk_filter, nl); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1217 | } |
| 1218 | |
| 1219 | /* Routing table change via netlink interface. */ |
Stephen Hemminger | 6072b24 | 2008-08-14 16:52:26 +0100 | [diff] [blame] | 1220 | static int |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1221 | netlink_route (int cmd, int family, void *dest, int length, void *gate, |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1222 | int index, int zebra_flags, int table) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1223 | { |
| 1224 | int ret; |
| 1225 | int bytelen; |
| 1226 | struct sockaddr_nl snl; |
| 1227 | int discard; |
| 1228 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1229 | struct |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1230 | { |
| 1231 | struct nlmsghdr n; |
| 1232 | struct rtmsg r; |
| 1233 | char buf[1024]; |
| 1234 | } req; |
| 1235 | |
| 1236 | memset (&req, 0, sizeof req); |
| 1237 | |
| 1238 | bytelen = (family == AF_INET ? 4 : 16); |
| 1239 | |
| 1240 | req.n.nlmsg_len = NLMSG_LENGTH (sizeof (struct rtmsg)); |
| 1241 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; |
| 1242 | req.n.nlmsg_type = cmd; |
| 1243 | req.r.rtm_family = family; |
| 1244 | req.r.rtm_table = table; |
| 1245 | req.r.rtm_dst_len = length; |
Timo Teräs | 40da221 | 2008-08-13 17:37:14 +0100 | [diff] [blame] | 1246 | req.r.rtm_protocol = RTPROT_ZEBRA; |
| 1247 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1248 | |
hasso | 81dfcaa | 2003-05-25 19:21:25 +0000 | [diff] [blame] | 1249 | if ((zebra_flags & ZEBRA_FLAG_BLACKHOLE) |
| 1250 | || (zebra_flags & ZEBRA_FLAG_REJECT)) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1251 | discard = 1; |
| 1252 | else |
| 1253 | discard = 0; |
| 1254 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1255 | if (cmd == RTM_NEWROUTE) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1256 | { |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1257 | if (discard) |
paul | 595db7f | 2003-05-25 21:35:06 +0000 | [diff] [blame] | 1258 | { |
| 1259 | if (zebra_flags & ZEBRA_FLAG_BLACKHOLE) |
| 1260 | req.r.rtm_type = RTN_BLACKHOLE; |
| 1261 | else if (zebra_flags & ZEBRA_FLAG_REJECT) |
| 1262 | req.r.rtm_type = RTN_UNREACHABLE; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1263 | else |
| 1264 | assert (RTN_BLACKHOLE != RTN_UNREACHABLE); /* false */ |
| 1265 | } |
paul | 595db7f | 2003-05-25 21:35:06 +0000 | [diff] [blame] | 1266 | else |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1267 | req.r.rtm_type = RTN_UNICAST; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1268 | } |
| 1269 | |
| 1270 | if (dest) |
| 1271 | addattr_l (&req.n, sizeof req, RTA_DST, dest, bytelen); |
| 1272 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1273 | if (!discard) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1274 | { |
| 1275 | if (gate) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1276 | addattr_l (&req.n, sizeof req, RTA_GATEWAY, gate, bytelen); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1277 | if (index > 0) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1278 | addattr32 (&req.n, sizeof req, RTA_OIF, index); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1279 | } |
| 1280 | |
| 1281 | /* Destination netlink address. */ |
| 1282 | memset (&snl, 0, sizeof snl); |
| 1283 | snl.nl_family = AF_NETLINK; |
| 1284 | |
| 1285 | /* Talk to netlink socket. */ |
hasso | b7ed1ec | 2005-03-31 20:13:49 +0000 | [diff] [blame] | 1286 | ret = netlink_talk (&req.n, &netlink_cmd); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1287 | if (ret < 0) |
| 1288 | return -1; |
| 1289 | |
| 1290 | return 0; |
| 1291 | } |
| 1292 | |
| 1293 | /* Routing table change via netlink interface. */ |
Stephen Hemminger | 6072b24 | 2008-08-14 16:52:26 +0100 | [diff] [blame] | 1294 | static int |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1295 | netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib, |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1296 | int family) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1297 | { |
| 1298 | int bytelen; |
| 1299 | struct sockaddr_nl snl; |
| 1300 | struct nexthop *nexthop = NULL; |
| 1301 | int nexthop_num = 0; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1302 | int discard; |
| 1303 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1304 | struct |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1305 | { |
| 1306 | struct nlmsghdr n; |
| 1307 | struct rtmsg r; |
| 1308 | char buf[1024]; |
| 1309 | } req; |
| 1310 | |
| 1311 | memset (&req, 0, sizeof req); |
| 1312 | |
| 1313 | bytelen = (family == AF_INET ? 4 : 16); |
| 1314 | |
| 1315 | req.n.nlmsg_len = NLMSG_LENGTH (sizeof (struct rtmsg)); |
| 1316 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; |
| 1317 | req.n.nlmsg_type = cmd; |
| 1318 | req.r.rtm_family = family; |
| 1319 | req.r.rtm_table = rib->table; |
| 1320 | req.r.rtm_dst_len = p->prefixlen; |
Timo Teräs | 40da221 | 2008-08-13 17:37:14 +0100 | [diff] [blame] | 1321 | req.r.rtm_protocol = RTPROT_ZEBRA; |
| 1322 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1323 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1324 | if ((rib->flags & ZEBRA_FLAG_BLACKHOLE) || (rib->flags & ZEBRA_FLAG_REJECT)) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1325 | discard = 1; |
| 1326 | else |
| 1327 | discard = 0; |
| 1328 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1329 | if (cmd == RTM_NEWROUTE) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1330 | { |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1331 | if (discard) |
paul | 595db7f | 2003-05-25 21:35:06 +0000 | [diff] [blame] | 1332 | { |
| 1333 | if (rib->flags & ZEBRA_FLAG_BLACKHOLE) |
| 1334 | req.r.rtm_type = RTN_BLACKHOLE; |
| 1335 | else if (rib->flags & ZEBRA_FLAG_REJECT) |
| 1336 | req.r.rtm_type = RTN_UNREACHABLE; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1337 | else |
| 1338 | assert (RTN_BLACKHOLE != RTN_UNREACHABLE); /* false */ |
| 1339 | } |
paul | 595db7f | 2003-05-25 21:35:06 +0000 | [diff] [blame] | 1340 | else |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1341 | req.r.rtm_type = RTN_UNICAST; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1342 | } |
| 1343 | |
| 1344 | addattr_l (&req.n, sizeof req, RTA_DST, &p->u.prefix, bytelen); |
| 1345 | |
| 1346 | /* Metric. */ |
| 1347 | addattr32 (&req.n, sizeof req, RTA_PRIORITY, rib->metric); |
| 1348 | |
| 1349 | if (discard) |
| 1350 | { |
| 1351 | if (cmd == RTM_NEWROUTE) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1352 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) |
| 1353 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1354 | goto skip; |
| 1355 | } |
| 1356 | |
| 1357 | /* Multipath case. */ |
| 1358 | if (rib->nexthop_active_num == 1 || MULTIPATH_NUM == 1) |
| 1359 | { |
| 1360 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1361 | { |
paul | 5ec90d2 | 2003-06-19 01:41:37 +0000 | [diff] [blame] | 1362 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1363 | if ((cmd == RTM_NEWROUTE |
| 1364 | && CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) |
| 1365 | || (cmd == RTM_DELROUTE |
| 1366 | && CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB))) |
| 1367 | { |
paul | 5ec90d2 | 2003-06-19 01:41:37 +0000 | [diff] [blame] | 1368 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1369 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) |
| 1370 | { |
| 1371 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1372 | { |
ajs | b617800 | 2004-12-07 21:12:56 +0000 | [diff] [blame] | 1373 | zlog_debug |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1374 | ("netlink_route_multipath() (recursive, 1 hop): " |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1375 | "%s %s/%d, type %s", lookup (nlmsg_str, cmd), |
hasso | 1ada819 | 2005-06-12 11:28:18 +0000 | [diff] [blame] | 1376 | #ifdef HAVE_IPV6 |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1377 | (family == AF_INET) ? inet_ntoa (p->u.prefix4) : |
hasso | 1ada819 | 2005-06-12 11:28:18 +0000 | [diff] [blame] | 1378 | inet6_ntoa (p->u.prefix6), |
| 1379 | #else |
| 1380 | inet_ntoa (p->u.prefix4), |
| 1381 | #endif /* HAVE_IPV6 */ |
| 1382 | |
| 1383 | p->prefixlen, nexthop_types_desc[nexthop->rtype]); |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1384 | } |
paul | 5ec90d2 | 2003-06-19 01:41:37 +0000 | [diff] [blame] | 1385 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1386 | if (nexthop->rtype == NEXTHOP_TYPE_IPV4 |
| 1387 | || nexthop->rtype == NEXTHOP_TYPE_IPV4_IFINDEX) |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1388 | { |
| 1389 | addattr_l (&req.n, sizeof req, RTA_GATEWAY, |
| 1390 | &nexthop->rgate.ipv4, bytelen); |
Paul Jakma | 7514fb7 | 2007-05-02 16:05:35 +0000 | [diff] [blame] | 1391 | if (nexthop->src.ipv4.s_addr) |
| 1392 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, |
| 1393 | &nexthop->src.ipv4, bytelen); |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1394 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1395 | zlog_debug("netlink_route_multipath() (recursive, " |
| 1396 | "1 hop): nexthop via %s if %u", |
| 1397 | inet_ntoa (nexthop->rgate.ipv4), |
| 1398 | nexthop->rifindex); |
| 1399 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1400 | #ifdef HAVE_IPV6 |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1401 | if (nexthop->rtype == NEXTHOP_TYPE_IPV6 |
| 1402 | || nexthop->rtype == NEXTHOP_TYPE_IPV6_IFINDEX |
| 1403 | || nexthop->rtype == NEXTHOP_TYPE_IPV6_IFNAME) |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1404 | { |
| 1405 | addattr_l (&req.n, sizeof req, RTA_GATEWAY, |
| 1406 | &nexthop->rgate.ipv6, bytelen); |
| 1407 | |
| 1408 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1409 | zlog_debug("netlink_route_multipath() (recursive, " |
| 1410 | "1 hop): nexthop via %s if %u", |
| 1411 | inet6_ntoa (nexthop->rgate.ipv6), |
| 1412 | nexthop->rifindex); |
| 1413 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1414 | #endif /* HAVE_IPV6 */ |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1415 | if (nexthop->rtype == NEXTHOP_TYPE_IFINDEX |
| 1416 | || nexthop->rtype == NEXTHOP_TYPE_IFNAME |
| 1417 | || nexthop->rtype == NEXTHOP_TYPE_IPV4_IFINDEX |
| 1418 | || nexthop->rtype == NEXTHOP_TYPE_IPV6_IFINDEX |
| 1419 | || nexthop->rtype == NEXTHOP_TYPE_IPV6_IFNAME) |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1420 | { |
| 1421 | addattr32 (&req.n, sizeof req, RTA_OIF, |
| 1422 | nexthop->rifindex); |
Paul Jakma | 7514fb7 | 2007-05-02 16:05:35 +0000 | [diff] [blame] | 1423 | if ((nexthop->rtype == NEXTHOP_TYPE_IPV4_IFINDEX |
| 1424 | || nexthop->rtype == NEXTHOP_TYPE_IFINDEX) |
| 1425 | && nexthop->src.ipv4.s_addr) |
| 1426 | addattr_l (&req.n, sizeof req, RTA_PREFSRC, |
| 1427 | &nexthop->src.ipv4, bytelen); |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1428 | |
| 1429 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1430 | zlog_debug("netlink_route_multipath() (recursive, " |
| 1431 | "1 hop): nexthop via if %u", |
| 1432 | nexthop->rifindex); |
| 1433 | } |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1434 | } |
| 1435 | else |
| 1436 | { |
| 1437 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1438 | { |
ajs | b617800 | 2004-12-07 21:12:56 +0000 | [diff] [blame] | 1439 | zlog_debug |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1440 | ("netlink_route_multipath() (single hop): " |
| 1441 | "%s %s/%d, type %s", lookup (nlmsg_str, cmd), |
hasso | 1ada819 | 2005-06-12 11:28:18 +0000 | [diff] [blame] | 1442 | #ifdef HAVE_IPV6 |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1443 | (family == AF_INET) ? inet_ntoa (p->u.prefix4) : |
hasso | 1ada819 | 2005-06-12 11:28:18 +0000 | [diff] [blame] | 1444 | inet6_ntoa (p->u.prefix6), |
| 1445 | #else |
| 1446 | inet_ntoa (p->u.prefix4), |
| 1447 | #endif /* HAVE_IPV6 */ |
| 1448 | p->prefixlen, nexthop_types_desc[nexthop->type]); |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1449 | } |
paul | 5ec90d2 | 2003-06-19 01:41:37 +0000 | [diff] [blame] | 1450 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1451 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
| 1452 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1453 | { |
| 1454 | addattr_l (&req.n, sizeof req, RTA_GATEWAY, |
| 1455 | &nexthop->gate.ipv4, bytelen); |
Paul Jakma | 7514fb7 | 2007-05-02 16:05:35 +0000 | [diff] [blame] | 1456 | if (nexthop->src.ipv4.s_addr) |
| 1457 | addattr_l (&req.n, sizeof req, RTA_PREFSRC, |
| 1458 | &nexthop->src.ipv4, bytelen); |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1459 | |
| 1460 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1461 | zlog_debug("netlink_route_multipath() (single hop): " |
| 1462 | "nexthop via %s if %u", |
| 1463 | inet_ntoa (nexthop->gate.ipv4), |
| 1464 | nexthop->ifindex); |
| 1465 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1466 | #ifdef HAVE_IPV6 |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1467 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
| 1468 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME |
| 1469 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1470 | { |
| 1471 | addattr_l (&req.n, sizeof req, RTA_GATEWAY, |
| 1472 | &nexthop->gate.ipv6, bytelen); |
| 1473 | |
| 1474 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1475 | zlog_debug("netlink_route_multipath() (single hop): " |
| 1476 | "nexthop via %s if %u", |
| 1477 | inet6_ntoa (nexthop->gate.ipv6), |
| 1478 | nexthop->ifindex); |
| 1479 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1480 | #endif /* HAVE_IPV6 */ |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1481 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX |
| 1482 | || nexthop->type == NEXTHOP_TYPE_IFNAME |
Paul Jakma | 7514fb7 | 2007-05-02 16:05:35 +0000 | [diff] [blame] | 1483 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
| 1484 | { |
| 1485 | addattr32 (&req.n, sizeof req, RTA_OIF, nexthop->ifindex); |
| 1486 | |
| 1487 | if (nexthop->src.ipv4.s_addr) |
| 1488 | addattr_l (&req.n, sizeof req, RTA_PREFSRC, |
| 1489 | &nexthop->src.ipv4, bytelen); |
| 1490 | |
| 1491 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1492 | zlog_debug("netlink_route_multipath() (single hop): " |
| 1493 | "nexthop via if %u", nexthop->ifindex); |
| 1494 | } |
| 1495 | else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1496 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME) |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1497 | { |
| 1498 | addattr32 (&req.n, sizeof req, RTA_OIF, nexthop->ifindex); |
| 1499 | |
| 1500 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1501 | zlog_debug("netlink_route_multipath() (single hop): " |
| 1502 | "nexthop via if %u", nexthop->ifindex); |
| 1503 | } |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1504 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1505 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1506 | if (cmd == RTM_NEWROUTE) |
| 1507 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1508 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1509 | nexthop_num++; |
| 1510 | break; |
| 1511 | } |
| 1512 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1513 | } |
| 1514 | else |
| 1515 | { |
| 1516 | char buf[1024]; |
| 1517 | struct rtattr *rta = (void *) buf; |
| 1518 | struct rtnexthop *rtnh; |
Paul Jakma | 7514fb7 | 2007-05-02 16:05:35 +0000 | [diff] [blame] | 1519 | union g_addr *src = NULL; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1520 | |
| 1521 | rta->rta_type = RTA_MULTIPATH; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1522 | rta->rta_len = RTA_LENGTH (0); |
| 1523 | rtnh = RTA_DATA (rta); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1524 | |
| 1525 | nexthop_num = 0; |
| 1526 | for (nexthop = rib->nexthop; |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1527 | nexthop && (MULTIPATH_NUM == 0 || nexthop_num < MULTIPATH_NUM); |
| 1528 | nexthop = nexthop->next) |
| 1529 | { |
| 1530 | if ((cmd == RTM_NEWROUTE |
| 1531 | && CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) |
| 1532 | || (cmd == RTM_DELROUTE |
| 1533 | && CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB))) |
| 1534 | { |
| 1535 | nexthop_num++; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1536 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1537 | rtnh->rtnh_len = sizeof (*rtnh); |
| 1538 | rtnh->rtnh_flags = 0; |
| 1539 | rtnh->rtnh_hops = 0; |
| 1540 | rta->rta_len += rtnh->rtnh_len; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1541 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1542 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) |
| 1543 | { |
| 1544 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1545 | { |
ajs | b617800 | 2004-12-07 21:12:56 +0000 | [diff] [blame] | 1546 | zlog_debug ("netlink_route_multipath() " |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1547 | "(recursive, multihop): %s %s/%d type %s", |
hasso | 1ada819 | 2005-06-12 11:28:18 +0000 | [diff] [blame] | 1548 | lookup (nlmsg_str, cmd), |
| 1549 | #ifdef HAVE_IPV6 |
| 1550 | (family == AF_INET) ? inet_ntoa (p->u.prefix4) : |
| 1551 | inet6_ntoa (p->u.prefix6), |
| 1552 | #else |
| 1553 | inet_ntoa (p->u.prefix4), |
| 1554 | #endif /* HAVE_IPV6 */ |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1555 | p->prefixlen, nexthop_types_desc[nexthop->rtype]); |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1556 | } |
| 1557 | if (nexthop->rtype == NEXTHOP_TYPE_IPV4 |
| 1558 | || nexthop->rtype == NEXTHOP_TYPE_IPV4_IFINDEX) |
| 1559 | { |
| 1560 | rta_addattr_l (rta, 4096, RTA_GATEWAY, |
| 1561 | &nexthop->rgate.ipv4, bytelen); |
| 1562 | rtnh->rtnh_len += sizeof (struct rtattr) + 4; |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1563 | |
Paul Jakma | 7514fb7 | 2007-05-02 16:05:35 +0000 | [diff] [blame] | 1564 | if (nexthop->src.ipv4.s_addr) |
| 1565 | src = &nexthop->src; |
| 1566 | |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1567 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1568 | zlog_debug("netlink_route_multipath() (recursive, " |
| 1569 | "multihop): nexthop via %s if %u", |
| 1570 | inet_ntoa (nexthop->rgate.ipv4), |
| 1571 | nexthop->rifindex); |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1572 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1573 | #ifdef HAVE_IPV6 |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1574 | if (nexthop->rtype == NEXTHOP_TYPE_IPV6 |
| 1575 | || nexthop->rtype == NEXTHOP_TYPE_IPV6_IFNAME |
| 1576 | || nexthop->rtype == NEXTHOP_TYPE_IPV6_IFINDEX) |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1577 | { |
| 1578 | rta_addattr_l (rta, 4096, RTA_GATEWAY, |
| 1579 | &nexthop->rgate.ipv6, bytelen); |
| 1580 | |
| 1581 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1582 | zlog_debug("netlink_route_multipath() (recursive, " |
| 1583 | "multihop): nexthop via %s if %u", |
| 1584 | inet6_ntoa (nexthop->rgate.ipv6), |
| 1585 | nexthop->rifindex); |
| 1586 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1587 | #endif /* HAVE_IPV6 */ |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1588 | /* ifindex */ |
Paul Jakma | 7514fb7 | 2007-05-02 16:05:35 +0000 | [diff] [blame] | 1589 | if (nexthop->rtype == NEXTHOP_TYPE_IPV4_IFINDEX |
| 1590 | || nexthop->rtype == NEXTHOP_TYPE_IFINDEX |
| 1591 | || nexthop->rtype == NEXTHOP_TYPE_IFNAME) |
| 1592 | { |
| 1593 | rtnh->rtnh_ifindex = nexthop->rifindex; |
| 1594 | if (nexthop->src.ipv4.s_addr) |
| 1595 | src = &nexthop->src; |
| 1596 | |
| 1597 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1598 | zlog_debug("netlink_route_multipath() (recursive, " |
| 1599 | "multihop): nexthop via if %u", |
| 1600 | nexthop->rifindex); |
| 1601 | } |
| 1602 | else if (nexthop->rtype == NEXTHOP_TYPE_IPV6_IFINDEX |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1603 | || nexthop->rtype == NEXTHOP_TYPE_IPV6_IFNAME) |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1604 | { |
| 1605 | rtnh->rtnh_ifindex = nexthop->rifindex; |
| 1606 | |
| 1607 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1608 | zlog_debug("netlink_route_multipath() (recursive, " |
| 1609 | "multihop): nexthop via if %u", |
| 1610 | nexthop->rifindex); |
| 1611 | } |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1612 | else |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1613 | { |
| 1614 | rtnh->rtnh_ifindex = 0; |
| 1615 | } |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1616 | } |
| 1617 | else |
| 1618 | { |
| 1619 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1620 | { |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1621 | zlog_debug ("netlink_route_multipath() (multihop): " |
| 1622 | "%s %s/%d, type %s", lookup (nlmsg_str, cmd), |
hasso | 1ada819 | 2005-06-12 11:28:18 +0000 | [diff] [blame] | 1623 | #ifdef HAVE_IPV6 |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1624 | (family == AF_INET) ? inet_ntoa (p->u.prefix4) : |
hasso | 1ada819 | 2005-06-12 11:28:18 +0000 | [diff] [blame] | 1625 | inet6_ntoa (p->u.prefix6), |
| 1626 | #else |
| 1627 | inet_ntoa (p->u.prefix4), |
| 1628 | #endif /* HAVE_IPV6 */ |
| 1629 | p->prefixlen, nexthop_types_desc[nexthop->type]); |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1630 | } |
| 1631 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
| 1632 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
| 1633 | { |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1634 | rta_addattr_l (rta, 4096, RTA_GATEWAY, |
| 1635 | &nexthop->gate.ipv4, bytelen); |
| 1636 | rtnh->rtnh_len += sizeof (struct rtattr) + 4; |
| 1637 | |
Paul Jakma | 7514fb7 | 2007-05-02 16:05:35 +0000 | [diff] [blame] | 1638 | if (nexthop->src.ipv4.s_addr) |
| 1639 | src = &nexthop->src; |
| 1640 | |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1641 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1642 | zlog_debug("netlink_route_multipath() (multihop): " |
| 1643 | "nexthop via %s if %u", |
| 1644 | inet_ntoa (nexthop->gate.ipv4), |
| 1645 | nexthop->ifindex); |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1646 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1647 | #ifdef HAVE_IPV6 |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1648 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
| 1649 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME |
| 1650 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1651 | { |
| 1652 | rta_addattr_l (rta, 4096, RTA_GATEWAY, |
| 1653 | &nexthop->gate.ipv6, bytelen); |
| 1654 | |
| 1655 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1656 | zlog_debug("netlink_route_multipath() (multihop): " |
| 1657 | "nexthop via %s if %u", |
| 1658 | inet6_ntoa (nexthop->gate.ipv6), |
| 1659 | nexthop->ifindex); |
| 1660 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1661 | #endif /* HAVE_IPV6 */ |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1662 | /* ifindex */ |
Paul Jakma | 7514fb7 | 2007-05-02 16:05:35 +0000 | [diff] [blame] | 1663 | if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX |
| 1664 | || nexthop->type == NEXTHOP_TYPE_IFINDEX |
| 1665 | || nexthop->type == NEXTHOP_TYPE_IFNAME) |
| 1666 | { |
| 1667 | rtnh->rtnh_ifindex = nexthop->ifindex; |
| 1668 | if (nexthop->src.ipv4.s_addr) |
| 1669 | src = &nexthop->src; |
| 1670 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1671 | zlog_debug("netlink_route_multipath() (multihop): " |
| 1672 | "nexthop via if %u", nexthop->ifindex); |
| 1673 | } |
| 1674 | else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1675 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1676 | { |
| 1677 | rtnh->rtnh_ifindex = nexthop->ifindex; |
| 1678 | |
| 1679 | if (IS_ZEBRA_DEBUG_KERNEL) |
| 1680 | zlog_debug("netlink_route_multipath() (multihop): " |
| 1681 | "nexthop via if %u", nexthop->ifindex); |
| 1682 | } |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1683 | else |
hasso | 206d805 | 2005-04-09 16:38:51 +0000 | [diff] [blame] | 1684 | { |
| 1685 | rtnh->rtnh_ifindex = 0; |
| 1686 | } |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1687 | } |
| 1688 | rtnh = RTNH_NEXT (rtnh); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1689 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1690 | if (cmd == RTM_NEWROUTE) |
| 1691 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
| 1692 | } |
| 1693 | } |
Paul Jakma | 7514fb7 | 2007-05-02 16:05:35 +0000 | [diff] [blame] | 1694 | if (src) |
| 1695 | addattr_l (&req.n, sizeof req, RTA_PREFSRC, &src->ipv4, bytelen); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1696 | |
| 1697 | if (rta->rta_len > RTA_LENGTH (0)) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1698 | addattr_l (&req.n, 1024, RTA_MULTIPATH, RTA_DATA (rta), |
| 1699 | RTA_PAYLOAD (rta)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1700 | } |
| 1701 | |
| 1702 | /* If there is no useful nexthop then return. */ |
| 1703 | if (nexthop_num == 0) |
| 1704 | { |
| 1705 | if (IS_ZEBRA_DEBUG_KERNEL) |
ajs | b617800 | 2004-12-07 21:12:56 +0000 | [diff] [blame] | 1706 | zlog_debug ("netlink_route_multipath(): No useful nexthop."); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1707 | return 0; |
| 1708 | } |
| 1709 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1710 | skip: |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1711 | |
| 1712 | /* Destination netlink address. */ |
| 1713 | memset (&snl, 0, sizeof snl); |
| 1714 | snl.nl_family = AF_NETLINK; |
| 1715 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1716 | /* Talk to netlink socket. */ |
hasso | b7ed1ec | 2005-03-31 20:13:49 +0000 | [diff] [blame] | 1717 | return netlink_talk (&req.n, &netlink_cmd); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1718 | } |
| 1719 | |
| 1720 | int |
| 1721 | kernel_add_ipv4 (struct prefix *p, struct rib *rib) |
| 1722 | { |
| 1723 | return netlink_route_multipath (RTM_NEWROUTE, p, rib, AF_INET); |
| 1724 | } |
| 1725 | |
| 1726 | int |
| 1727 | kernel_delete_ipv4 (struct prefix *p, struct rib *rib) |
| 1728 | { |
| 1729 | return netlink_route_multipath (RTM_DELROUTE, p, rib, AF_INET); |
| 1730 | } |
| 1731 | |
| 1732 | #ifdef HAVE_IPV6 |
| 1733 | int |
| 1734 | kernel_add_ipv6 (struct prefix *p, struct rib *rib) |
| 1735 | { |
| 1736 | return netlink_route_multipath (RTM_NEWROUTE, p, rib, AF_INET6); |
| 1737 | } |
| 1738 | |
| 1739 | int |
| 1740 | kernel_delete_ipv6 (struct prefix *p, struct rib *rib) |
| 1741 | { |
| 1742 | return netlink_route_multipath (RTM_DELROUTE, p, rib, AF_INET6); |
| 1743 | } |
| 1744 | |
| 1745 | /* Delete IPv6 route from the kernel. */ |
| 1746 | int |
| 1747 | kernel_delete_ipv6_old (struct prefix_ipv6 *dest, struct in6_addr *gate, |
paul | 6621ca8 | 2005-11-23 13:02:08 +0000 | [diff] [blame] | 1748 | unsigned int index, int flags, int table) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1749 | { |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1750 | return netlink_route (RTM_DELROUTE, AF_INET6, &dest->prefix, |
| 1751 | dest->prefixlen, gate, index, flags, table); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1752 | } |
| 1753 | #endif /* HAVE_IPV6 */ |
| 1754 | |
| 1755 | /* Interface address modification. */ |
Stephen Hemminger | 6072b24 | 2008-08-14 16:52:26 +0100 | [diff] [blame] | 1756 | static int |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1757 | netlink_address (int cmd, int family, struct interface *ifp, |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1758 | struct connected *ifc) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1759 | { |
| 1760 | int bytelen; |
| 1761 | struct prefix *p; |
| 1762 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1763 | struct |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1764 | { |
| 1765 | struct nlmsghdr n; |
| 1766 | struct ifaddrmsg ifa; |
| 1767 | char buf[1024]; |
| 1768 | } req; |
| 1769 | |
| 1770 | p = ifc->address; |
| 1771 | memset (&req, 0, sizeof req); |
| 1772 | |
| 1773 | bytelen = (family == AF_INET ? 4 : 16); |
| 1774 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1775 | req.n.nlmsg_len = NLMSG_LENGTH (sizeof (struct ifaddrmsg)); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1776 | req.n.nlmsg_flags = NLM_F_REQUEST; |
| 1777 | req.n.nlmsg_type = cmd; |
| 1778 | req.ifa.ifa_family = family; |
| 1779 | |
| 1780 | req.ifa.ifa_index = ifp->ifindex; |
| 1781 | req.ifa.ifa_prefixlen = p->prefixlen; |
| 1782 | |
| 1783 | addattr_l (&req.n, sizeof req, IFA_LOCAL, &p->u.prefix, bytelen); |
| 1784 | |
| 1785 | if (family == AF_INET && cmd == RTM_NEWADDR) |
| 1786 | { |
Andrew J. Schorr | e452963 | 2006-12-12 19:18:21 +0000 | [diff] [blame] | 1787 | if (!CONNECTED_PEER(ifc) && ifc->destination) |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1788 | { |
| 1789 | p = ifc->destination; |
| 1790 | addattr_l (&req.n, sizeof req, IFA_BROADCAST, &p->u.prefix, |
| 1791 | bytelen); |
| 1792 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1793 | } |
| 1794 | |
| 1795 | if (CHECK_FLAG (ifc->flags, ZEBRA_IFA_SECONDARY)) |
| 1796 | SET_FLAG (req.ifa.ifa_flags, IFA_F_SECONDARY); |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1797 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1798 | if (ifc->label) |
| 1799 | addattr_l (&req.n, sizeof req, IFA_LABEL, ifc->label, |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1800 | strlen (ifc->label) + 1); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1801 | |
| 1802 | return netlink_talk (&req.n, &netlink_cmd); |
| 1803 | } |
| 1804 | |
| 1805 | int |
| 1806 | kernel_address_add_ipv4 (struct interface *ifp, struct connected *ifc) |
| 1807 | { |
| 1808 | return netlink_address (RTM_NEWADDR, AF_INET, ifp, ifc); |
| 1809 | } |
| 1810 | |
| 1811 | int |
| 1812 | kernel_address_delete_ipv4 (struct interface *ifp, struct connected *ifc) |
| 1813 | { |
| 1814 | return netlink_address (RTM_DELADDR, AF_INET, ifp, ifc); |
| 1815 | } |
| 1816 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1817 | |
| 1818 | extern struct thread_master *master; |
| 1819 | |
| 1820 | /* Kernel route reflection. */ |
Stephen Hemminger | 6072b24 | 2008-08-14 16:52:26 +0100 | [diff] [blame] | 1821 | static int |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1822 | kernel_read (struct thread *thread) |
| 1823 | { |
| 1824 | int ret; |
| 1825 | int sock; |
| 1826 | |
| 1827 | sock = THREAD_FD (thread); |
| 1828 | ret = netlink_parse_info (netlink_information_fetch, &netlink); |
paul | b21b19c | 2003-06-15 01:28:29 +0000 | [diff] [blame] | 1829 | thread_add_read (zebrad.master, kernel_read, NULL, netlink.sock); |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1830 | |
| 1831 | return 0; |
| 1832 | } |
| 1833 | |
Stephen Hemminger | 3d265b4 | 2008-08-16 17:30:39 +0100 | [diff] [blame] | 1834 | /* Filter out messages from self that occur on listener socket, |
| 1835 | caused by our actions on the command socket |
| 1836 | */ |
| 1837 | static void netlink_install_filter (int sock, __u32 pid) |
Paul Jakma | 768a27e | 2008-05-29 18:23:08 +0000 | [diff] [blame] | 1838 | { |
Paul Jakma | 768a27e | 2008-05-29 18:23:08 +0000 | [diff] [blame] | 1839 | struct sock_filter filter[] = { |
Stephen Hemminger | 3d265b4 | 2008-08-16 17:30:39 +0100 | [diff] [blame] | 1840 | /* 0: ldh [4] */ |
| 1841 | BPF_STMT(BPF_LD|BPF_ABS|BPF_H, offsetof(struct nlmsghdr, nlmsg_type)), |
| 1842 | /* 1: jeq 0x18 jt 3 jf 6 */ |
| 1843 | BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, htons(RTM_NEWROUTE), 1, 0), |
| 1844 | /* 2: jeq 0x19 jt 3 jf 6 */ |
| 1845 | BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, htons(RTM_DELROUTE), 0, 3), |
| 1846 | /* 3: ldw [12] */ |
| 1847 | BPF_STMT(BPF_LD|BPF_ABS|BPF_W, offsetof(struct nlmsghdr, nlmsg_pid)), |
| 1848 | /* 4: jeq XX jt 5 jf 6 */ |
| 1849 | BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, htonl(pid), 0, 1), |
| 1850 | /* 5: ret 0 (skip) */ |
| 1851 | BPF_STMT(BPF_RET|BPF_K, 0), |
| 1852 | /* 6: ret 0xffff (keep) */ |
| 1853 | BPF_STMT(BPF_RET|BPF_K, 0xffff), |
Paul Jakma | 768a27e | 2008-05-29 18:23:08 +0000 | [diff] [blame] | 1854 | }; |
| 1855 | |
| 1856 | struct sock_fprog prog = { |
| 1857 | .len = sizeof(filter) / sizeof(filter[0]), |
| 1858 | .filter = filter, |
| 1859 | }; |
| 1860 | |
| 1861 | if (setsockopt(sock, SOL_SOCKET, SO_ATTACH_FILTER, &prog, sizeof(prog)) < 0) |
| 1862 | zlog_warn ("Can't install socket filter: %s\n", safe_strerror(errno)); |
| 1863 | } |
| 1864 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1865 | /* Exported interface function. This function simply calls |
| 1866 | netlink_socket (). */ |
| 1867 | void |
paul | 6621ca8 | 2005-11-23 13:02:08 +0000 | [diff] [blame] | 1868 | kernel_init (void) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1869 | { |
| 1870 | unsigned long groups; |
| 1871 | |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1872 | groups = RTMGRP_LINK | RTMGRP_IPV4_ROUTE | RTMGRP_IPV4_IFADDR; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1873 | #ifdef HAVE_IPV6 |
paul | 7021c42 | 2003-07-15 12:52:22 +0000 | [diff] [blame] | 1874 | groups |= RTMGRP_IPV6_ROUTE | RTMGRP_IPV6_IFADDR; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1875 | #endif /* HAVE_IPV6 */ |
| 1876 | netlink_socket (&netlink, groups); |
| 1877 | netlink_socket (&netlink_cmd, 0); |
| 1878 | |
| 1879 | /* Register kernel socket. */ |
| 1880 | if (netlink.sock > 0) |
Paul Jakma | 768a27e | 2008-05-29 18:23:08 +0000 | [diff] [blame] | 1881 | { |
Stephen Hemminger | 4cde931 | 2008-08-16 17:51:27 +0100 | [diff] [blame] | 1882 | /* Only want non-blocking on the netlink event socket */ |
| 1883 | if (fcntl (netlink.sock, F_SETFL, O_NONBLOCK) < 0) |
| 1884 | zlog (NULL, LOG_ERR, "Can't set %s socket flags: %s", netlink.name, |
| 1885 | safe_strerror (errno)); |
| 1886 | |
Stephen Hemminger | 30afea3 | 2008-08-16 18:25:47 +0100 | [diff] [blame] | 1887 | /* Set receive buffer size if it's set from command line */ |
| 1888 | if (nl_rcvbufsize) |
| 1889 | netlink_recvbuf (&netlink, nl_rcvbufsize); |
| 1890 | |
Stephen Hemminger | 3d265b4 | 2008-08-16 17:30:39 +0100 | [diff] [blame] | 1891 | netlink_install_filter (netlink.sock, netlink_cmd.snl.nl_pid); |
Paul Jakma | 768a27e | 2008-05-29 18:23:08 +0000 | [diff] [blame] | 1892 | thread_add_read (zebrad.master, kernel_read, NULL, netlink.sock); |
| 1893 | } |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1894 | } |