osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 1 | /* |
| 2 | * iplink.c "ip link". |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; either version |
| 7 | * 2 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <stdio.h> |
| 14 | #include <stdlib.h> |
| 15 | #include <unistd.h> |
| 16 | #include <syslog.h> |
| 17 | #include <fcntl.h> |
Patrick McHardy | 1d93483 | 2007-08-22 10:49:01 -0700 | [diff] [blame] | 18 | #include <dlfcn.h> |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 19 | #include <errno.h> |
| 20 | #include <sys/socket.h> |
| 21 | #include <linux/if.h> |
| 22 | #include <linux/if_packet.h> |
| 23 | #include <linux/if_ether.h> |
| 24 | #include <linux/sockios.h> |
| 25 | #include <netinet/in.h> |
| 26 | #include <arpa/inet.h> |
| 27 | #include <string.h> |
| 28 | #include <sys/ioctl.h> |
| 29 | #include <linux/sockios.h> |
| 30 | |
| 31 | #include "rt_names.h" |
| 32 | #include "utils.h" |
| 33 | #include "ip_common.h" |
| 34 | |
Patrick McHardy | 1d93483 | 2007-08-22 10:49:01 -0700 | [diff] [blame] | 35 | #define IPLINK_IOCTL_COMPAT 1 |
Andreas Henriksson | 5e3bb53 | 2008-08-22 16:54:12 +0200 | [diff] [blame] | 36 | #ifndef LIBDIR |
| 37 | #define LIBDIR "/usr/lib/" |
Rafael Almeida | b514b35 | 2008-06-01 21:33:44 -0300 | [diff] [blame] | 38 | #endif |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 39 | |
| 40 | static void usage(void) __attribute__((noreturn)); |
Stephen Hemminger | 750a405 | 2008-10-13 07:17:08 -0700 | [diff] [blame] | 41 | static int iplink_have_newlink(void); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 42 | |
| 43 | void iplink_usage(void) |
| 44 | { |
Stephen Hemminger | 750a405 | 2008-10-13 07:17:08 -0700 | [diff] [blame] | 45 | if (iplink_have_newlink()) { |
| 46 | fprintf(stderr, "Usage: ip link add link DEV [ name ] NAME\n"); |
| 47 | fprintf(stderr, " [ txqueuelen PACKETS ]\n"); |
| 48 | fprintf(stderr, " [ address LLADDR ]\n"); |
| 49 | fprintf(stderr, " [ broadcast LLADDR ]\n"); |
| 50 | fprintf(stderr, " [ mtu MTU ]\n"); |
| 51 | fprintf(stderr, " type TYPE [ ARGS ]\n"); |
| 52 | fprintf(stderr, " ip link delete DEV type TYPE [ ARGS ]\n"); |
| 53 | fprintf(stderr, "\n"); |
| 54 | fprintf(stderr, " ip link set DEVICE [ { up | down } ]\n"); |
| 55 | } else |
| 56 | fprintf(stderr, "Usage: ip link set DEVICE [ { up | down } ]\n"); |
| 57 | |
| 58 | fprintf(stderr, " [ arp { on | off } ]\n"); |
| 59 | fprintf(stderr, " [ dynamic { on | off } ]\n"); |
| 60 | fprintf(stderr, " [ multicast { on | off } ]\n"); |
| 61 | fprintf(stderr, " [ allmulticast { on | off } ]\n"); |
| 62 | fprintf(stderr, " [ promisc { on | off } ]\n"); |
| 63 | fprintf(stderr, " [ trailers { on | off } ]\n"); |
| 64 | fprintf(stderr, " [ txqueuelen PACKETS ]\n"); |
| 65 | fprintf(stderr, " [ name NEWNAME ]\n"); |
| 66 | fprintf(stderr, " [ address LLADDR ]\n"); |
| 67 | fprintf(stderr, " [ broadcast LLADDR ]\n"); |
| 68 | fprintf(stderr, " [ mtu MTU ]\n"); |
| 69 | fprintf(stderr, " [ netns PID ]\n"); |
Stephen Hemminger | ace9c96 | 2009-03-23 10:46:47 -0700 | [diff] [blame] | 70 | fprintf(stderr, " [ alias NAME ]\n"); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 71 | fprintf(stderr, " ip link show [ DEVICE ]\n"); |
Stephen Hemminger | 750a405 | 2008-10-13 07:17:08 -0700 | [diff] [blame] | 72 | |
| 73 | if (iplink_have_newlink()) { |
| 74 | fprintf(stderr, "\n"); |
Wolfgang Grandegger | 5a20447 | 2009-05-12 11:42:50 +0200 | [diff] [blame^] | 75 | fprintf(stderr, "TYPE := { vlan | veth | vcan | dummy | ifb | macvlan | can }\n"); |
Stephen Hemminger | 750a405 | 2008-10-13 07:17:08 -0700 | [diff] [blame] | 76 | } |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 77 | exit(-1); |
| 78 | } |
| 79 | |
| 80 | static void usage(void) |
| 81 | { |
| 82 | iplink_usage(); |
| 83 | } |
| 84 | |
| 85 | static int on_off(char *msg) |
| 86 | { |
| 87 | fprintf(stderr, "Error: argument of \"%s\" must be \"on\" or \"off\"\n", msg); |
| 88 | return -1; |
| 89 | } |
| 90 | |
Patrick McHardy | 1d93483 | 2007-08-22 10:49:01 -0700 | [diff] [blame] | 91 | static void *BODY; /* cached dlopen(NULL) handle */ |
| 92 | static struct link_util *linkutil_list; |
| 93 | |
| 94 | struct link_util *get_link_kind(const char *id) |
| 95 | { |
| 96 | void *dlh; |
| 97 | char buf[256]; |
| 98 | struct link_util *l; |
| 99 | |
| 100 | for (l = linkutil_list; l; l = l->next) |
| 101 | if (strcmp(l->id, id) == 0) |
| 102 | return l; |
| 103 | |
Andreas Henriksson | 5e3bb53 | 2008-08-22 16:54:12 +0200 | [diff] [blame] | 104 | snprintf(buf, sizeof(buf), LIBDIR "/ip/link_%s.so", id); |
Patrick McHardy | 1d93483 | 2007-08-22 10:49:01 -0700 | [diff] [blame] | 105 | dlh = dlopen(buf, RTLD_LAZY); |
| 106 | if (dlh == NULL) { |
| 107 | /* look in current binary, only open once */ |
| 108 | dlh = BODY; |
| 109 | if (dlh == NULL) { |
| 110 | dlh = BODY = dlopen(NULL, RTLD_LAZY); |
| 111 | if (dlh == NULL) |
| 112 | return NULL; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | snprintf(buf, sizeof(buf), "%s_link_util", id); |
| 117 | l = dlsym(dlh, buf); |
| 118 | if (l == NULL) |
| 119 | return NULL; |
| 120 | |
| 121 | l->next = linkutil_list; |
| 122 | linkutil_list = l; |
| 123 | return l; |
| 124 | } |
| 125 | |
| 126 | #if IPLINK_IOCTL_COMPAT |
| 127 | static int have_rtnl_newlink = -1; |
| 128 | |
| 129 | static int accept_msg(const struct sockaddr_nl *who, |
| 130 | struct nlmsghdr *n, void *arg) |
| 131 | { |
| 132 | struct nlmsgerr *err = (struct nlmsgerr *)NLMSG_DATA(n); |
| 133 | |
Patrick McHardy | 66e529f | 2007-10-25 19:46:29 +0200 | [diff] [blame] | 134 | if (n->nlmsg_type == NLMSG_ERROR && |
| 135 | (err->error == -EOPNOTSUPP || err->error == -EINVAL)) |
Patrick McHardy | 1d93483 | 2007-08-22 10:49:01 -0700 | [diff] [blame] | 136 | have_rtnl_newlink = 0; |
| 137 | else |
| 138 | have_rtnl_newlink = 1; |
| 139 | return -1; |
| 140 | } |
| 141 | |
| 142 | static int iplink_have_newlink(void) |
| 143 | { |
| 144 | struct { |
| 145 | struct nlmsghdr n; |
| 146 | struct ifinfomsg i; |
| 147 | char buf[1024]; |
| 148 | } req; |
| 149 | |
| 150 | if (have_rtnl_newlink < 0) { |
| 151 | memset(&req, 0, sizeof(req)); |
| 152 | |
| 153 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); |
| 154 | req.n.nlmsg_flags = NLM_F_REQUEST|NLM_F_ACK; |
| 155 | req.n.nlmsg_type = RTM_NEWLINK; |
| 156 | req.i.ifi_family = AF_UNSPEC; |
| 157 | |
| 158 | rtnl_send(&rth, (char *)&req.n, req.n.nlmsg_len); |
| 159 | rtnl_listen(&rth, accept_msg, NULL); |
| 160 | } |
| 161 | return have_rtnl_newlink; |
| 162 | } |
| 163 | #else /* IPLINK_IOCTL_COMPAT */ |
| 164 | static int iplink_have_newlink(void) |
| 165 | { |
| 166 | return 1; |
| 167 | } |
| 168 | #endif /* ! IPLINK_IOCTL_COMPAT */ |
| 169 | |
Pavel Emelyanov | 909dfe2 | 2007-07-19 13:32:31 +0400 | [diff] [blame] | 170 | struct iplink_req { |
| 171 | struct nlmsghdr n; |
| 172 | struct ifinfomsg i; |
| 173 | char buf[1024]; |
| 174 | }; |
| 175 | |
| 176 | int iplink_parse(int argc, char **argv, struct iplink_req *req, |
| 177 | char **name, char **type, char **link, char **dev) |
Patrick McHardy | 1d93483 | 2007-08-22 10:49:01 -0700 | [diff] [blame] | 178 | { |
Pavel Emelyanov | 909dfe2 | 2007-07-19 13:32:31 +0400 | [diff] [blame] | 179 | int ret, len; |
| 180 | char abuf[32]; |
Patrick McHardy | 1d93483 | 2007-08-22 10:49:01 -0700 | [diff] [blame] | 181 | int qlen = -1; |
| 182 | int mtu = -1; |
Benjamin Thery | e2613dc | 2008-06-20 11:07:35 +0200 | [diff] [blame] | 183 | int netns = -1; |
Pavel Emelyanov | 909dfe2 | 2007-07-19 13:32:31 +0400 | [diff] [blame] | 184 | |
| 185 | ret = argc; |
| 186 | |
| 187 | while (argc > 0) { |
| 188 | if (strcmp(*argv, "up") == 0) { |
| 189 | req->i.ifi_change |= IFF_UP; |
| 190 | req->i.ifi_flags |= IFF_UP; |
| 191 | } else if (strcmp(*argv, "down") == 0) { |
| 192 | req->i.ifi_change |= IFF_UP; |
| 193 | req->i.ifi_flags &= ~IFF_UP; |
| 194 | } else if (strcmp(*argv, "name") == 0) { |
| 195 | NEXT_ARG(); |
| 196 | *name = *argv; |
| 197 | } else if (matches(*argv, "link") == 0) { |
| 198 | NEXT_ARG(); |
| 199 | *link = *argv; |
| 200 | } else if (matches(*argv, "address") == 0) { |
| 201 | NEXT_ARG(); |
| 202 | len = ll_addr_a2n(abuf, sizeof(abuf), *argv); |
Andreas Henriksson | cb2eb99 | 2009-04-30 16:50:50 +0200 | [diff] [blame] | 203 | if (len < 0) |
| 204 | return -1; |
Pavel Emelyanov | 909dfe2 | 2007-07-19 13:32:31 +0400 | [diff] [blame] | 205 | addattr_l(&req->n, sizeof(*req), IFLA_ADDRESS, abuf, len); |
| 206 | } else if (matches(*argv, "broadcast") == 0 || |
| 207 | strcmp(*argv, "brd") == 0) { |
| 208 | NEXT_ARG(); |
| 209 | len = ll_addr_a2n(abuf, sizeof(abuf), *argv); |
Andreas Henriksson | cb2eb99 | 2009-04-30 16:50:50 +0200 | [diff] [blame] | 210 | if (len < 0) |
| 211 | return -1; |
Pavel Emelyanov | 909dfe2 | 2007-07-19 13:32:31 +0400 | [diff] [blame] | 212 | addattr_l(&req->n, sizeof(*req), IFLA_BROADCAST, abuf, len); |
| 213 | } else if (matches(*argv, "txqueuelen") == 0 || |
| 214 | strcmp(*argv, "qlen") == 0 || |
| 215 | matches(*argv, "txqlen") == 0) { |
| 216 | NEXT_ARG(); |
| 217 | if (qlen != -1) |
| 218 | duparg("txqueuelen", *argv); |
| 219 | if (get_integer(&qlen, *argv, 0)) |
| 220 | invarg("Invalid \"txqueuelen\" value\n", *argv); |
| 221 | addattr_l(&req->n, sizeof(*req), IFLA_TXQLEN, &qlen, 4); |
| 222 | } else if (strcmp(*argv, "mtu") == 0) { |
| 223 | NEXT_ARG(); |
| 224 | if (mtu != -1) |
| 225 | duparg("mtu", *argv); |
| 226 | if (get_integer(&mtu, *argv, 0)) |
| 227 | invarg("Invalid \"mtu\" value\n", *argv); |
| 228 | addattr_l(&req->n, sizeof(*req), IFLA_MTU, &mtu, 4); |
Benjamin Thery | e2613dc | 2008-06-20 11:07:35 +0200 | [diff] [blame] | 229 | } else if (strcmp(*argv, "netns") == 0) { |
| 230 | NEXT_ARG(); |
| 231 | if (netns != -1) |
| 232 | duparg("netns", *argv); |
| 233 | if (get_integer(&netns, *argv, 0)) |
| 234 | invarg("Invalid \"netns\" value\n", *argv); |
| 235 | addattr_l(&req->n, sizeof(*req), IFLA_NET_NS_PID, &netns, 4); |
Pavel Emelyanov | 909dfe2 | 2007-07-19 13:32:31 +0400 | [diff] [blame] | 236 | } else if (strcmp(*argv, "multicast") == 0) { |
| 237 | NEXT_ARG(); |
| 238 | req->i.ifi_change |= IFF_MULTICAST; |
| 239 | if (strcmp(*argv, "on") == 0) { |
| 240 | req->i.ifi_flags |= IFF_MULTICAST; |
| 241 | } else if (strcmp(*argv, "off") == 0) { |
| 242 | req->i.ifi_flags &= ~IFF_MULTICAST; |
| 243 | } else |
| 244 | return on_off("multicast"); |
| 245 | } else if (strcmp(*argv, "allmulticast") == 0) { |
| 246 | NEXT_ARG(); |
| 247 | req->i.ifi_change |= IFF_ALLMULTI; |
| 248 | if (strcmp(*argv, "on") == 0) { |
| 249 | req->i.ifi_flags |= IFF_ALLMULTI; |
| 250 | } else if (strcmp(*argv, "off") == 0) { |
| 251 | req->i.ifi_flags &= ~IFF_ALLMULTI; |
| 252 | } else |
| 253 | return on_off("allmulticast"); |
| 254 | } else if (strcmp(*argv, "promisc") == 0) { |
| 255 | NEXT_ARG(); |
| 256 | req->i.ifi_change |= IFF_PROMISC; |
| 257 | if (strcmp(*argv, "on") == 0) { |
| 258 | req->i.ifi_flags |= IFF_PROMISC; |
| 259 | } else if (strcmp(*argv, "off") == 0) { |
| 260 | req->i.ifi_flags &= ~IFF_PROMISC; |
| 261 | } else |
| 262 | return on_off("promisc"); |
| 263 | } else if (strcmp(*argv, "trailers") == 0) { |
| 264 | NEXT_ARG(); |
| 265 | req->i.ifi_change |= IFF_NOTRAILERS; |
| 266 | if (strcmp(*argv, "off") == 0) { |
| 267 | req->i.ifi_flags |= IFF_NOTRAILERS; |
| 268 | } else if (strcmp(*argv, "on") == 0) { |
| 269 | req->i.ifi_flags &= ~IFF_NOTRAILERS; |
| 270 | } else |
| 271 | return on_off("trailers"); |
| 272 | } else if (strcmp(*argv, "arp") == 0) { |
| 273 | NEXT_ARG(); |
| 274 | req->i.ifi_change |= IFF_NOARP; |
| 275 | if (strcmp(*argv, "on") == 0) { |
| 276 | req->i.ifi_flags &= ~IFF_NOARP; |
| 277 | } else if (strcmp(*argv, "off") == 0) { |
| 278 | req->i.ifi_flags |= IFF_NOARP; |
| 279 | } else |
| 280 | return on_off("noarp"); |
| 281 | #ifdef IFF_DYNAMIC |
| 282 | } else if (matches(*argv, "dynamic") == 0) { |
| 283 | NEXT_ARG(); |
| 284 | req->i.ifi_change |= IFF_DYNAMIC; |
| 285 | if (strcmp(*argv, "on") == 0) { |
| 286 | req->i.ifi_flags |= IFF_DYNAMIC; |
| 287 | } else if (strcmp(*argv, "off") == 0) { |
| 288 | req->i.ifi_flags &= ~IFF_DYNAMIC; |
| 289 | } else |
| 290 | return on_off("dynamic"); |
| 291 | #endif |
| 292 | } else if (matches(*argv, "type") == 0) { |
| 293 | NEXT_ARG(); |
| 294 | *type = *argv; |
| 295 | argc--; argv++; |
| 296 | break; |
Stephen Hemminger | ace9c96 | 2009-03-23 10:46:47 -0700 | [diff] [blame] | 297 | } else if (matches(*argv, "alias") == 0) { |
| 298 | NEXT_ARG(); |
| 299 | addattr_l(&req->n, sizeof(*req), IFLA_IFALIAS, |
| 300 | *argv, strlen(*argv)); |
| 301 | argc--; argv++; |
| 302 | break; |
Pavel Emelyanov | 909dfe2 | 2007-07-19 13:32:31 +0400 | [diff] [blame] | 303 | } else { |
| 304 | if (strcmp(*argv, "dev") == 0) { |
| 305 | NEXT_ARG(); |
| 306 | } |
Patrick McHardy | 0532555 | 2008-10-07 17:16:08 +0200 | [diff] [blame] | 307 | if (matches(*argv, "help") == 0) |
| 308 | usage(); |
Pavel Emelyanov | 909dfe2 | 2007-07-19 13:32:31 +0400 | [diff] [blame] | 309 | if (*dev) |
| 310 | duparg2("dev", *argv); |
| 311 | *dev = *argv; |
| 312 | } |
| 313 | argc--; argv++; |
| 314 | } |
| 315 | |
| 316 | return ret - argc; |
| 317 | } |
| 318 | |
| 319 | static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv) |
| 320 | { |
Patrick McHardy | 1d93483 | 2007-08-22 10:49:01 -0700 | [diff] [blame] | 321 | int len; |
Patrick McHardy | 1d93483 | 2007-08-22 10:49:01 -0700 | [diff] [blame] | 322 | char *dev = NULL; |
| 323 | char *name = NULL; |
| 324 | char *link = NULL; |
| 325 | char *type = NULL; |
| 326 | struct link_util *lu = NULL; |
Pavel Emelyanov | 909dfe2 | 2007-07-19 13:32:31 +0400 | [diff] [blame] | 327 | struct iplink_req req; |
| 328 | int ret; |
Patrick McHardy | 1d93483 | 2007-08-22 10:49:01 -0700 | [diff] [blame] | 329 | |
| 330 | memset(&req, 0, sizeof(req)); |
| 331 | |
| 332 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); |
| 333 | req.n.nlmsg_flags = NLM_F_REQUEST|flags; |
| 334 | req.n.nlmsg_type = cmd; |
| 335 | req.i.ifi_family = preferred_family; |
| 336 | |
Pavel Emelyanov | 909dfe2 | 2007-07-19 13:32:31 +0400 | [diff] [blame] | 337 | ret = iplink_parse(argc, argv, &req, &name, &type, &link, &dev); |
| 338 | if (ret < 0) |
| 339 | return ret; |
Patrick McHardy | 1d93483 | 2007-08-22 10:49:01 -0700 | [diff] [blame] | 340 | |
Pavel Emelyanov | 909dfe2 | 2007-07-19 13:32:31 +0400 | [diff] [blame] | 341 | argc -= ret; |
| 342 | argv += ret; |
Patrick McHardy | 1d93483 | 2007-08-22 10:49:01 -0700 | [diff] [blame] | 343 | ll_init_map(&rth); |
| 344 | |
| 345 | if (type) { |
| 346 | struct rtattr *linkinfo = NLMSG_TAIL(&req.n); |
| 347 | addattr_l(&req.n, sizeof(req), IFLA_LINKINFO, NULL, 0); |
| 348 | addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, type, |
| 349 | strlen(type)); |
| 350 | |
| 351 | lu = get_link_kind(type); |
| 352 | if (lu && argc) { |
| 353 | struct rtattr * data = NLMSG_TAIL(&req.n); |
| 354 | addattr_l(&req.n, sizeof(req), IFLA_INFO_DATA, NULL, 0); |
| 355 | |
| 356 | if (lu->parse_opt && |
| 357 | lu->parse_opt(lu, argc, argv, &req.n)) |
| 358 | return -1; |
| 359 | |
| 360 | data->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)data; |
| 361 | } else if (argc) { |
| 362 | if (matches(*argv, "help") == 0) |
| 363 | usage(); |
| 364 | fprintf(stderr, "Garbage instead of arguments \"%s ...\". " |
| 365 | "Try \"ip link help\".\n", *argv); |
| 366 | return -1; |
| 367 | } |
| 368 | linkinfo->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)linkinfo; |
Patrick McHardy | 3ef0c85 | 2008-10-07 17:23:04 +0200 | [diff] [blame] | 369 | } else if (flags & NLM_F_CREATE) { |
| 370 | fprintf(stderr, "Not enough information: \"type\" argument " |
| 371 | "is required\n"); |
| 372 | return -1; |
Patrick McHardy | 1d93483 | 2007-08-22 10:49:01 -0700 | [diff] [blame] | 373 | } |
| 374 | |
| 375 | if (!(flags & NLM_F_CREATE)) { |
| 376 | if (!dev) { |
| 377 | fprintf(stderr, "Not enough information: \"dev\" " |
| 378 | "argument is required.\n"); |
| 379 | exit(-1); |
| 380 | } |
| 381 | |
| 382 | req.i.ifi_index = ll_name_to_index(dev); |
| 383 | if (req.i.ifi_index == 0) { |
| 384 | fprintf(stderr, "Cannot find device \"%s\"\n", dev); |
| 385 | return -1; |
| 386 | } |
| 387 | } else { |
| 388 | /* Allow "ip link add dev" and "ip link add name" */ |
| 389 | if (!name) |
| 390 | name = dev; |
| 391 | |
| 392 | if (link) { |
| 393 | int ifindex; |
| 394 | |
| 395 | ifindex = ll_name_to_index(link); |
| 396 | if (ifindex == 0) { |
| 397 | fprintf(stderr, "Cannot find device \"%s\"\n", |
| 398 | link); |
| 399 | return -1; |
| 400 | } |
| 401 | addattr_l(&req.n, sizeof(req), IFLA_LINK, &ifindex, 4); |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | if (name) { |
| 406 | len = strlen(name) + 1; |
Patrick McHardy | ca78b0e | 2007-10-12 14:01:13 +0200 | [diff] [blame] | 407 | if (len == 1) |
| 408 | invarg("\"\" is not a valid device identifier\n", "name"); |
Patrick McHardy | 1d93483 | 2007-08-22 10:49:01 -0700 | [diff] [blame] | 409 | if (len > IFNAMSIZ) |
Patrick McHardy | ca78b0e | 2007-10-12 14:01:13 +0200 | [diff] [blame] | 410 | invarg("\"name\" too long\n", name); |
Patrick McHardy | 1d93483 | 2007-08-22 10:49:01 -0700 | [diff] [blame] | 411 | addattr_l(&req.n, sizeof(req), IFLA_IFNAME, name, len); |
| 412 | } |
| 413 | |
| 414 | if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) |
| 415 | exit(2); |
| 416 | |
| 417 | return 0; |
| 418 | } |
| 419 | |
| 420 | #if IPLINK_IOCTL_COMPAT |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 421 | static int get_ctl_fd(void) |
| 422 | { |
| 423 | int s_errno; |
| 424 | int fd; |
| 425 | |
| 426 | fd = socket(PF_INET, SOCK_DGRAM, 0); |
| 427 | if (fd >= 0) |
| 428 | return fd; |
| 429 | s_errno = errno; |
| 430 | fd = socket(PF_PACKET, SOCK_DGRAM, 0); |
| 431 | if (fd >= 0) |
| 432 | return fd; |
| 433 | fd = socket(PF_INET6, SOCK_DGRAM, 0); |
| 434 | if (fd >= 0) |
| 435 | return fd; |
| 436 | errno = s_errno; |
| 437 | perror("Cannot create control socket"); |
| 438 | return -1; |
| 439 | } |
| 440 | |
osdl.net!shemminger | 71058eb | 2004-09-01 17:15:45 +0000 | [diff] [blame] | 441 | static int do_chflags(const char *dev, __u32 flags, __u32 mask) |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 442 | { |
| 443 | struct ifreq ifr; |
| 444 | int fd; |
| 445 | int err; |
| 446 | |
osdl.net!shemminger | 71058eb | 2004-09-01 17:15:45 +0000 | [diff] [blame] | 447 | strncpy(ifr.ifr_name, dev, IFNAMSIZ); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 448 | fd = get_ctl_fd(); |
| 449 | if (fd < 0) |
| 450 | return -1; |
| 451 | err = ioctl(fd, SIOCGIFFLAGS, &ifr); |
| 452 | if (err) { |
| 453 | perror("SIOCGIFFLAGS"); |
| 454 | close(fd); |
| 455 | return -1; |
| 456 | } |
| 457 | if ((ifr.ifr_flags^flags)&mask) { |
| 458 | ifr.ifr_flags &= ~mask; |
| 459 | ifr.ifr_flags |= mask&flags; |
| 460 | err = ioctl(fd, SIOCSIFFLAGS, &ifr); |
| 461 | if (err) |
| 462 | perror("SIOCSIFFLAGS"); |
| 463 | } |
| 464 | close(fd); |
| 465 | return err; |
| 466 | } |
| 467 | |
osdl.net!shemminger | 71058eb | 2004-09-01 17:15:45 +0000 | [diff] [blame] | 468 | static int do_changename(const char *dev, const char *newdev) |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 469 | { |
| 470 | struct ifreq ifr; |
| 471 | int fd; |
| 472 | int err; |
| 473 | |
osdl.net!shemminger | 71058eb | 2004-09-01 17:15:45 +0000 | [diff] [blame] | 474 | strncpy(ifr.ifr_name, dev, IFNAMSIZ); |
| 475 | strncpy(ifr.ifr_newname, newdev, IFNAMSIZ); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 476 | fd = get_ctl_fd(); |
| 477 | if (fd < 0) |
| 478 | return -1; |
| 479 | err = ioctl(fd, SIOCSIFNAME, &ifr); |
| 480 | if (err) { |
| 481 | perror("SIOCSIFNAME"); |
| 482 | close(fd); |
| 483 | return -1; |
| 484 | } |
| 485 | close(fd); |
| 486 | return err; |
| 487 | } |
| 488 | |
osdl.net!shemminger | 71058eb | 2004-09-01 17:15:45 +0000 | [diff] [blame] | 489 | static int set_qlen(const char *dev, int qlen) |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 490 | { |
| 491 | struct ifreq ifr; |
| 492 | int s; |
| 493 | |
| 494 | s = get_ctl_fd(); |
| 495 | if (s < 0) |
| 496 | return -1; |
| 497 | |
| 498 | memset(&ifr, 0, sizeof(ifr)); |
Stephen Hemminger | ae665a5 | 2006-12-05 10:10:22 -0800 | [diff] [blame] | 499 | strncpy(ifr.ifr_name, dev, IFNAMSIZ); |
| 500 | ifr.ifr_qlen = qlen; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 501 | if (ioctl(s, SIOCSIFTXQLEN, &ifr) < 0) { |
| 502 | perror("SIOCSIFXQLEN"); |
| 503 | close(s); |
| 504 | return -1; |
| 505 | } |
| 506 | close(s); |
| 507 | |
Stephen Hemminger | ae665a5 | 2006-12-05 10:10:22 -0800 | [diff] [blame] | 508 | return 0; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 509 | } |
| 510 | |
osdl.net!shemminger | 71058eb | 2004-09-01 17:15:45 +0000 | [diff] [blame] | 511 | static int set_mtu(const char *dev, int mtu) |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 512 | { |
| 513 | struct ifreq ifr; |
| 514 | int s; |
| 515 | |
| 516 | s = get_ctl_fd(); |
| 517 | if (s < 0) |
| 518 | return -1; |
| 519 | |
| 520 | memset(&ifr, 0, sizeof(ifr)); |
Stephen Hemminger | ae665a5 | 2006-12-05 10:10:22 -0800 | [diff] [blame] | 521 | strncpy(ifr.ifr_name, dev, IFNAMSIZ); |
| 522 | ifr.ifr_mtu = mtu; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 523 | if (ioctl(s, SIOCSIFMTU, &ifr) < 0) { |
| 524 | perror("SIOCSIFMTU"); |
| 525 | close(s); |
| 526 | return -1; |
| 527 | } |
| 528 | close(s); |
| 529 | |
Stephen Hemminger | ae665a5 | 2006-12-05 10:10:22 -0800 | [diff] [blame] | 530 | return 0; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 531 | } |
| 532 | |
osdl.net!shemminger | 71058eb | 2004-09-01 17:15:45 +0000 | [diff] [blame] | 533 | static int get_address(const char *dev, int *htype) |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 534 | { |
| 535 | struct ifreq ifr; |
| 536 | struct sockaddr_ll me; |
shemminger | f332d16 | 2005-07-05 22:37:15 +0000 | [diff] [blame] | 537 | socklen_t alen; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 538 | int s; |
| 539 | |
| 540 | s = socket(PF_PACKET, SOCK_DGRAM, 0); |
Stephen Hemminger | ae665a5 | 2006-12-05 10:10:22 -0800 | [diff] [blame] | 541 | if (s < 0) { |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 542 | perror("socket(PF_PACKET)"); |
| 543 | return -1; |
| 544 | } |
| 545 | |
| 546 | memset(&ifr, 0, sizeof(ifr)); |
osdl.net!shemminger | 71058eb | 2004-09-01 17:15:45 +0000 | [diff] [blame] | 547 | strncpy(ifr.ifr_name, dev, IFNAMSIZ); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 548 | if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) { |
| 549 | perror("SIOCGIFINDEX"); |
| 550 | close(s); |
| 551 | return -1; |
| 552 | } |
| 553 | |
| 554 | memset(&me, 0, sizeof(me)); |
| 555 | me.sll_family = AF_PACKET; |
| 556 | me.sll_ifindex = ifr.ifr_ifindex; |
| 557 | me.sll_protocol = htons(ETH_P_LOOP); |
| 558 | if (bind(s, (struct sockaddr*)&me, sizeof(me)) == -1) { |
| 559 | perror("bind"); |
| 560 | close(s); |
| 561 | return -1; |
| 562 | } |
| 563 | |
| 564 | alen = sizeof(me); |
| 565 | if (getsockname(s, (struct sockaddr*)&me, &alen) == -1) { |
| 566 | perror("getsockname"); |
| 567 | close(s); |
| 568 | return -1; |
| 569 | } |
| 570 | close(s); |
| 571 | *htype = me.sll_hatype; |
| 572 | return me.sll_halen; |
| 573 | } |
| 574 | |
Stephen Hemminger | ae665a5 | 2006-12-05 10:10:22 -0800 | [diff] [blame] | 575 | static int parse_address(const char *dev, int hatype, int halen, |
shemminger | 7b56575 | 2006-03-21 23:57:50 +0000 | [diff] [blame] | 576 | char *lla, struct ifreq *ifr) |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 577 | { |
| 578 | int alen; |
| 579 | |
| 580 | memset(ifr, 0, sizeof(*ifr)); |
osdl.net!shemminger | 71058eb | 2004-09-01 17:15:45 +0000 | [diff] [blame] | 581 | strncpy(ifr->ifr_name, dev, IFNAMSIZ); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 582 | ifr->ifr_hwaddr.sa_family = hatype; |
| 583 | alen = ll_addr_a2n(ifr->ifr_hwaddr.sa_data, 14, lla); |
| 584 | if (alen < 0) |
| 585 | return -1; |
| 586 | if (alen != halen) { |
| 587 | fprintf(stderr, "Wrong address (%s) length: expected %d bytes\n", lla, halen); |
| 588 | return -1; |
| 589 | } |
Stephen Hemminger | ae665a5 | 2006-12-05 10:10:22 -0800 | [diff] [blame] | 590 | return 0; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 591 | } |
| 592 | |
| 593 | static int set_address(struct ifreq *ifr, int brd) |
| 594 | { |
| 595 | int s; |
| 596 | |
| 597 | s = get_ctl_fd(); |
| 598 | if (s < 0) |
| 599 | return -1; |
| 600 | if (ioctl(s, brd?SIOCSIFHWBROADCAST:SIOCSIFHWADDR, ifr) < 0) { |
| 601 | perror(brd?"SIOCSIFHWBROADCAST":"SIOCSIFHWADDR"); |
| 602 | close(s); |
| 603 | return -1; |
| 604 | } |
| 605 | close(s); |
Stephen Hemminger | ae665a5 | 2006-12-05 10:10:22 -0800 | [diff] [blame] | 606 | return 0; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 607 | } |
| 608 | |
| 609 | |
| 610 | static int do_set(int argc, char **argv) |
| 611 | { |
| 612 | char *dev = NULL; |
| 613 | __u32 mask = 0; |
| 614 | __u32 flags = 0; |
| 615 | int qlen = -1; |
| 616 | int mtu = -1; |
| 617 | char *newaddr = NULL; |
| 618 | char *newbrd = NULL; |
| 619 | struct ifreq ifr0, ifr1; |
| 620 | char *newname = NULL; |
| 621 | int htype, halen; |
| 622 | |
| 623 | while (argc > 0) { |
| 624 | if (strcmp(*argv, "up") == 0) { |
| 625 | mask |= IFF_UP; |
| 626 | flags |= IFF_UP; |
| 627 | } else if (strcmp(*argv, "down") == 0) { |
| 628 | mask |= IFF_UP; |
| 629 | flags &= ~IFF_UP; |
| 630 | } else if (strcmp(*argv, "name") == 0) { |
| 631 | NEXT_ARG(); |
| 632 | newname = *argv; |
| 633 | } else if (matches(*argv, "address") == 0) { |
| 634 | NEXT_ARG(); |
| 635 | newaddr = *argv; |
| 636 | } else if (matches(*argv, "broadcast") == 0 || |
| 637 | strcmp(*argv, "brd") == 0) { |
| 638 | NEXT_ARG(); |
| 639 | newbrd = *argv; |
| 640 | } else if (matches(*argv, "txqueuelen") == 0 || |
| 641 | strcmp(*argv, "qlen") == 0 || |
| 642 | matches(*argv, "txqlen") == 0) { |
| 643 | NEXT_ARG(); |
| 644 | if (qlen != -1) |
| 645 | duparg("txqueuelen", *argv); |
| 646 | if (get_integer(&qlen, *argv, 0)) |
| 647 | invarg("Invalid \"txqueuelen\" value\n", *argv); |
| 648 | } else if (strcmp(*argv, "mtu") == 0) { |
| 649 | NEXT_ARG(); |
| 650 | if (mtu != -1) |
| 651 | duparg("mtu", *argv); |
| 652 | if (get_integer(&mtu, *argv, 0)) |
| 653 | invarg("Invalid \"mtu\" value\n", *argv); |
| 654 | } else if (strcmp(*argv, "multicast") == 0) { |
| 655 | NEXT_ARG(); |
| 656 | mask |= IFF_MULTICAST; |
| 657 | if (strcmp(*argv, "on") == 0) { |
| 658 | flags |= IFF_MULTICAST; |
| 659 | } else if (strcmp(*argv, "off") == 0) { |
| 660 | flags &= ~IFF_MULTICAST; |
| 661 | } else |
| 662 | return on_off("multicast"); |
net[shemminger]!shemminger | d27b1b5 | 2004-07-01 22:15:50 +0000 | [diff] [blame] | 663 | } else if (strcmp(*argv, "allmulticast") == 0) { |
| 664 | NEXT_ARG(); |
| 665 | mask |= IFF_ALLMULTI; |
| 666 | if (strcmp(*argv, "on") == 0) { |
| 667 | flags |= IFF_ALLMULTI; |
| 668 | } else if (strcmp(*argv, "off") == 0) { |
| 669 | flags &= ~IFF_ALLMULTI; |
| 670 | } else |
| 671 | return on_off("allmulticast"); |
| 672 | } else if (strcmp(*argv, "promisc") == 0) { |
| 673 | NEXT_ARG(); |
| 674 | mask |= IFF_PROMISC; |
| 675 | if (strcmp(*argv, "on") == 0) { |
| 676 | flags |= IFF_PROMISC; |
| 677 | } else if (strcmp(*argv, "off") == 0) { |
| 678 | flags &= ~IFF_PROMISC; |
| 679 | } else |
| 680 | return on_off("promisc"); |
| 681 | } else if (strcmp(*argv, "trailers") == 0) { |
| 682 | NEXT_ARG(); |
| 683 | mask |= IFF_NOTRAILERS; |
| 684 | if (strcmp(*argv, "off") == 0) { |
| 685 | flags |= IFF_NOTRAILERS; |
| 686 | } else if (strcmp(*argv, "on") == 0) { |
| 687 | flags &= ~IFF_NOTRAILERS; |
| 688 | } else |
| 689 | return on_off("trailers"); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 690 | } else if (strcmp(*argv, "arp") == 0) { |
| 691 | NEXT_ARG(); |
| 692 | mask |= IFF_NOARP; |
| 693 | if (strcmp(*argv, "on") == 0) { |
| 694 | flags &= ~IFF_NOARP; |
| 695 | } else if (strcmp(*argv, "off") == 0) { |
| 696 | flags |= IFF_NOARP; |
| 697 | } else |
| 698 | return on_off("noarp"); |
| 699 | #ifdef IFF_DYNAMIC |
| 700 | } else if (matches(*argv, "dynamic") == 0) { |
| 701 | NEXT_ARG(); |
| 702 | mask |= IFF_DYNAMIC; |
| 703 | if (strcmp(*argv, "on") == 0) { |
| 704 | flags |= IFF_DYNAMIC; |
| 705 | } else if (strcmp(*argv, "off") == 0) { |
| 706 | flags &= ~IFF_DYNAMIC; |
| 707 | } else |
| 708 | return on_off("dynamic"); |
| 709 | #endif |
| 710 | } else { |
| 711 | if (strcmp(*argv, "dev") == 0) { |
| 712 | NEXT_ARG(); |
| 713 | } |
| 714 | if (matches(*argv, "help") == 0) |
| 715 | usage(); |
| 716 | if (dev) |
| 717 | duparg2("dev", *argv); |
| 718 | dev = *argv; |
| 719 | } |
| 720 | argc--; argv++; |
| 721 | } |
| 722 | |
| 723 | if (!dev) { |
| 724 | fprintf(stderr, "Not enough of information: \"dev\" argument is required.\n"); |
| 725 | exit(-1); |
| 726 | } |
| 727 | |
| 728 | if (newaddr || newbrd) { |
| 729 | halen = get_address(dev, &htype); |
| 730 | if (halen < 0) |
| 731 | return -1; |
| 732 | if (newaddr) { |
| 733 | if (parse_address(dev, htype, halen, newaddr, &ifr0) < 0) |
| 734 | return -1; |
| 735 | } |
| 736 | if (newbrd) { |
| 737 | if (parse_address(dev, htype, halen, newbrd, &ifr1) < 0) |
Stephen Hemminger | ae665a5 | 2006-12-05 10:10:22 -0800 | [diff] [blame] | 738 | return -1; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 739 | } |
| 740 | } |
| 741 | |
| 742 | if (newname && strcmp(dev, newname)) { |
Patrick McHardy | ca78b0e | 2007-10-12 14:01:13 +0200 | [diff] [blame] | 743 | if (strlen(newname) == 0) |
| 744 | invarg("\"\" is not a valid device identifier\n", "name"); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 745 | if (do_changename(dev, newname) < 0) |
| 746 | return -1; |
| 747 | dev = newname; |
| 748 | } |
Stephen Hemminger | ae665a5 | 2006-12-05 10:10:22 -0800 | [diff] [blame] | 749 | if (qlen != -1) { |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 750 | if (set_qlen(dev, qlen) < 0) |
Stephen Hemminger | ae665a5 | 2006-12-05 10:10:22 -0800 | [diff] [blame] | 751 | return -1; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 752 | } |
Stephen Hemminger | ae665a5 | 2006-12-05 10:10:22 -0800 | [diff] [blame] | 753 | if (mtu != -1) { |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 754 | if (set_mtu(dev, mtu) < 0) |
Stephen Hemminger | ae665a5 | 2006-12-05 10:10:22 -0800 | [diff] [blame] | 755 | return -1; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 756 | } |
| 757 | if (newaddr || newbrd) { |
| 758 | if (newbrd) { |
| 759 | if (set_address(&ifr1, 1) < 0) |
Stephen Hemminger | ae665a5 | 2006-12-05 10:10:22 -0800 | [diff] [blame] | 760 | return -1; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 761 | } |
| 762 | if (newaddr) { |
| 763 | if (set_address(&ifr0, 0) < 0) |
| 764 | return -1; |
| 765 | } |
| 766 | } |
| 767 | if (mask) |
| 768 | return do_chflags(dev, flags, mask); |
| 769 | return 0; |
| 770 | } |
Patrick McHardy | 1d93483 | 2007-08-22 10:49:01 -0700 | [diff] [blame] | 771 | #endif /* IPLINK_IOCTL_COMPAT */ |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 772 | |
| 773 | int do_iplink(int argc, char **argv) |
| 774 | { |
| 775 | if (argc > 0) { |
Patrick McHardy | 1d93483 | 2007-08-22 10:49:01 -0700 | [diff] [blame] | 776 | if (iplink_have_newlink()) { |
| 777 | if (matches(*argv, "add") == 0) |
| 778 | return iplink_modify(RTM_NEWLINK, |
| 779 | NLM_F_CREATE|NLM_F_EXCL, |
| 780 | argc-1, argv+1); |
| 781 | if (matches(*argv, "set") == 0 || |
| 782 | matches(*argv, "change") == 0) |
| 783 | return iplink_modify(RTM_NEWLINK, 0, |
| 784 | argc-1, argv+1); |
| 785 | if (matches(*argv, "replace") == 0) |
| 786 | return iplink_modify(RTM_NEWLINK, |
| 787 | NLM_F_CREATE|NLM_F_REPLACE, |
| 788 | argc-1, argv+1); |
| 789 | if (matches(*argv, "delete") == 0) |
| 790 | return iplink_modify(RTM_DELLINK, 0, |
| 791 | argc-1, argv+1); |
| 792 | } else { |
| 793 | #if IPLINK_IOCTL_COMPAT |
| 794 | if (matches(*argv, "set") == 0) |
| 795 | return do_set(argc-1, argv+1); |
| 796 | #endif |
| 797 | } |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 798 | if (matches(*argv, "show") == 0 || |
| 799 | matches(*argv, "lst") == 0 || |
| 800 | matches(*argv, "list") == 0) |
| 801 | return ipaddr_list_link(argc-1, argv+1); |
| 802 | if (matches(*argv, "help") == 0) |
| 803 | usage(); |
| 804 | } else |
| 805 | return ipaddr_list_link(0, NULL); |
| 806 | |
| 807 | fprintf(stderr, "Command \"%s\" is unknown, try \"ip link help\".\n", *argv); |
| 808 | exit(-1); |
| 809 | } |