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.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
14 * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
22 #include <sys/socket.h>
23 #include <netinet/in.h>
24 #include <netinet/ip.h>
25 #include <arpa/inet.h>
31 extern struct rtnl_handle rth;
33 static void usage(void) __attribute__((noreturn));
35 static void usage(void)
37 fprintf(stderr, "Usage: ip rule [ list | add | del | flush ] SELECTOR ACTION\n");
38 fprintf(stderr, "SELECTOR := [ from PREFIX ] [ to PREFIX ] [ tos TOS ] [ fwmark FWMARK ]\n");
39 fprintf(stderr, " [ dev STRING ] [ pref NUMBER ]\n");
40 fprintf(stderr, "ACTION := [ table TABLE_ID ]\n");
41 fprintf(stderr, " [ prohibit | reject | unreachable ]\n");
42 fprintf(stderr, " [ realms [SRCREALM/]DSTREALM ]\n");
43 fprintf(stderr, "TABLE_ID := [ local | main | default | NUMBER ]\n");
47 static int print_rule(const struct sockaddr_nl *who, struct nlmsghdr *n,
50 FILE *fp = (FILE*)arg;
51 struct rtmsg *r = NLMSG_DATA(n);
52 int len = n->nlmsg_len;
54 struct rtattr * tb[RTA_MAX+1];
58 if (n->nlmsg_type != RTM_NEWRULE)
61 len -= NLMSG_LENGTH(sizeof(*r));
65 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
67 if (r->rtm_family == AF_INET)
69 else if (r->rtm_family == AF_INET6)
71 else if (r->rtm_family == AF_DECnet)
73 else if (r->rtm_family == AF_IPX)
77 fprintf(fp, "%u:\t", *(unsigned*)RTA_DATA(tb[RTA_PRIORITY]));
82 if (r->rtm_src_len != host_len) {
83 fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family,
84 RTA_PAYLOAD(tb[RTA_SRC]),
85 RTA_DATA(tb[RTA_SRC]),
90 fprintf(fp, "from %s ", format_host(r->rtm_family,
91 RTA_PAYLOAD(tb[RTA_SRC]),
92 RTA_DATA(tb[RTA_SRC]),
96 } else if (r->rtm_src_len) {
97 fprintf(fp, "from 0/%d ", r->rtm_src_len);
99 fprintf(fp, "from all ");
103 if (r->rtm_dst_len != host_len) {
104 fprintf(fp, "to %s/%u ", rt_addr_n2a(r->rtm_family,
105 RTA_PAYLOAD(tb[RTA_DST]),
106 RTA_DATA(tb[RTA_DST]),
111 fprintf(fp, "to %s ", format_host(r->rtm_family,
112 RTA_PAYLOAD(tb[RTA_DST]),
113 RTA_DATA(tb[RTA_DST]),
114 abuf, sizeof(abuf)));
116 } else if (r->rtm_dst_len) {
117 fprintf(fp, "to 0/%d ", r->rtm_dst_len);
122 fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
124 if (tb[RTA_PROTOINFO]) {
125 fprintf(fp, "fwmark %#x ", *(__u32*)RTA_DATA(tb[RTA_PROTOINFO]));
129 fprintf(fp, "iif %s ", (char*)RTA_DATA(tb[RTA_IIF]));
133 fprintf(fp, "lookup %s ", rtnl_rttable_n2a(r->rtm_table, b1, sizeof(b1)));
136 __u32 to = *(__u32*)RTA_DATA(tb[RTA_FLOW]);
140 fprintf(fp, "realms %s/",
141 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
144 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
147 if (r->rtm_type == RTN_NAT) {
148 if (tb[RTA_GATEWAY]) {
149 fprintf(fp, "map-to %s ",
150 format_host(r->rtm_family,
151 RTA_PAYLOAD(tb[RTA_GATEWAY]),
152 RTA_DATA(tb[RTA_GATEWAY]),
153 abuf, sizeof(abuf)));
155 fprintf(fp, "masquerade");
156 } else if (r->rtm_type != RTN_UNICAST)
157 fprintf(fp, "%s", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
164 static int iprule_list(int argc, char **argv)
166 int af = preferred_family;
172 fprintf(stderr, "\"ip rule show\" does not take any arguments.\n");
176 if (rtnl_wilddump_request(&rth, af, RTM_GETRULE) < 0) {
177 perror("Cannot send dump request");
181 if (rtnl_dump_filter(&rth, print_rule, stdout, NULL, NULL) < 0) {
182 fprintf(stderr, "Dump terminated\n");
190 static int iprule_modify(int cmd, int argc, char **argv)
199 memset(&req, 0, sizeof(req));
201 req.n.nlmsg_type = cmd;
202 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
203 req.n.nlmsg_flags = NLM_F_REQUEST;
204 req.r.rtm_family = preferred_family;
205 req.r.rtm_protocol = RTPROT_BOOT;
206 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
208 req.r.rtm_type = RTN_UNSPEC;
210 if (cmd == RTM_NEWRULE) {
211 req.n.nlmsg_flags |= NLM_F_CREATE|NLM_F_EXCL;
212 req.r.rtm_type = RTN_UNICAST;
216 if (strcmp(*argv, "from") == 0) {
219 get_prefix(&dst, *argv, req.r.rtm_family);
220 req.r.rtm_src_len = dst.bitlen;
221 addattr_l(&req.n, sizeof(req), RTA_SRC, &dst.data, dst.bytelen);
222 } else if (strcmp(*argv, "to") == 0) {
225 get_prefix(&dst, *argv, req.r.rtm_family);
226 req.r.rtm_dst_len = dst.bitlen;
227 addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen);
228 } else if (matches(*argv, "preference") == 0 ||
229 matches(*argv, "order") == 0 ||
230 matches(*argv, "priority") == 0) {
233 if (get_u32(&pref, *argv, 0))
234 invarg("preference value is invalid\n", *argv);
235 addattr32(&req.n, sizeof(req), RTA_PRIORITY, pref);
236 } else if (strcmp(*argv, "tos") == 0) {
239 if (rtnl_dsfield_a2n(&tos, *argv))
240 invarg("TOS value is invalid\n", *argv);
242 } else if (strcmp(*argv, "fwmark") == 0) {
245 if (get_u32(&fwmark, *argv, 0))
246 invarg("fwmark value is invalid\n", *argv);
247 addattr32(&req.n, sizeof(req), RTA_PROTOINFO, fwmark);
248 } else if (matches(*argv, "realms") == 0) {
251 if (get_rt_realms(&realm, *argv))
252 invarg("invalid realms\n", *argv);
253 addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
254 } else if (matches(*argv, "table") == 0 ||
255 strcmp(*argv, "lookup") == 0) {
258 if (rtnl_rttable_a2n(&tid, *argv))
259 invarg("invalid table ID\n", *argv);
260 req.r.rtm_table = tid;
262 } else if (strcmp(*argv, "dev") == 0 ||
263 strcmp(*argv, "iif") == 0) {
265 addattr_l(&req.n, sizeof(req), RTA_IIF, *argv, strlen(*argv)+1);
266 } else if (strcmp(*argv, "nat") == 0 ||
267 matches(*argv, "map-to") == 0) {
269 fprintf(stderr, "Warning: route NAT is deprecated\n");
270 addattr32(&req.n, sizeof(req), RTA_GATEWAY, get_addr32(*argv));
271 req.r.rtm_type = RTN_NAT;
275 if (strcmp(*argv, "type") == 0) {
278 if (matches(*argv, "help") == 0)
280 if (rtnl_rtntype_a2n(&type, *argv))
281 invarg("Failed to parse rule type", *argv);
282 req.r.rtm_type = type;
288 if (req.r.rtm_family == AF_UNSPEC)
289 req.r.rtm_family = AF_INET;
291 if (!table_ok && cmd == RTM_NEWRULE)
292 req.r.rtm_table = RT_TABLE_MAIN;
294 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
301 static int flush_rule(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
303 struct rtnl_handle rth2;
304 struct rtmsg *r = NLMSG_DATA(n);
305 int len = n->nlmsg_len;
306 struct rtattr * tb[RTA_MAX+1];
308 len -= NLMSG_LENGTH(sizeof(*r));
312 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
314 if (tb[RTA_PRIORITY]) {
315 n->nlmsg_type = RTM_DELRULE;
316 n->nlmsg_flags = NLM_F_REQUEST;
318 if (rtnl_open(&rth2, 0) < 0)
321 if (rtnl_talk(&rth2, n, 0, 0, NULL, NULL, NULL) < 0)
330 static int iprule_flush(int argc, char **argv)
332 int af = preferred_family;
338 fprintf(stderr, "\"ip rule flush\" does not allow arguments\n");
342 if (rtnl_wilddump_request(&rth, af, RTM_GETRULE) < 0) {
343 perror("Cannot send dump request");
347 if (rtnl_dump_filter(&rth, flush_rule, NULL, NULL, NULL) < 0) {
348 fprintf(stderr, "Flush terminated\n");
355 int do_iprule(int argc, char **argv)
358 return iprule_list(0, NULL);
359 } else if (matches(argv[0], "list") == 0 ||
360 matches(argv[0], "lst") == 0 ||
361 matches(argv[0], "show") == 0) {
362 return iprule_list(argc-1, argv+1);
363 } else if (matches(argv[0], "add") == 0) {
364 return iprule_modify(RTM_NEWRULE, argc-1, argv+1);
365 } else if (matches(argv[0], "delete") == 0) {
366 return iprule_modify(RTM_DELRULE, argc-1, argv+1);
367 } else if (matches(argv[0], "flush") == 0) {
368 return iprule_flush(argc-1, argv+1);
369 } else if (matches(argv[0], "help") == 0)
372 fprintf(stderr, "Command \"%s\" is unknown, try \"ip rule help\".\n", *argv);