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git.proxmox.com Git - mirror_iproute2.git/blob - ip/iprule.c
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 rtmsg
*r
= NLMSG_DATA(n
);
304 int len
= n
->nlmsg_len
;
305 struct rtattr
* tb
[RTA_MAX
+1];
307 len
-= NLMSG_LENGTH(sizeof(*r
));
311 parse_rtattr(tb
, RTA_MAX
, RTM_RTA(r
), len
);
313 if (tb
[RTA_PRIORITY
]) {
314 n
->nlmsg_type
= RTM_DELRULE
;
315 n
->nlmsg_flags
= NLM_F_REQUEST
;
317 if (rtnl_talk(&rth
, n
, 0, 0, NULL
, NULL
, NULL
) < 0)
324 static int iprule_flush(int argc
, char **argv
)
326 int af
= preferred_family
;
332 fprintf(stderr
, "\"ip rule flush\" does not allow arguments\n");
336 if (rtnl_wilddump_request(&rth
, af
, RTM_GETRULE
) < 0) {
337 perror("Cannot send dump request");
341 if (rtnl_dump_filter(&rth
, flush_rule
, NULL
, NULL
, NULL
) < 0) {
342 fprintf(stderr
, "Flush terminated\n");
349 int do_iprule(int argc
, char **argv
)
352 return iprule_list(0, NULL
);
353 } else if (matches(argv
[0], "list") == 0 ||
354 matches(argv
[0], "lst") == 0 ||
355 matches(argv
[0], "show") == 0) {
356 return iprule_list(argc
-1, argv
+1);
357 } else if (matches(argv
[0], "add") == 0) {
358 return iprule_modify(RTM_NEWRULE
, argc
-1, argv
+1);
359 } else if (matches(argv
[0], "delete") == 0) {
360 return iprule_modify(RTM_DELRULE
, argc
-1, argv
+1);
361 } else if (matches(argv
[0], "flush") == 0) {
362 return iprule_flush(argc
-1, argv
+1);
363 } else if (matches(argv
[0], "help") == 0)
366 fprintf(stderr
, "Command \"%s\" is unknown, try \"ip rule help\".\n", *argv
);