]>
git.proxmox.com Git - mirror_iproute2.git/blob - ip/iprule.c
7140375fc4fdf54ae2f1a4f20bb264e23d79acbe
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>
18 #include <sys/socket.h>
19 #include <netinet/in.h>
20 #include <netinet/ip.h>
21 #include <arpa/inet.h>
23 #include <linux/fib_rules.h>
27 #include "ip_common.h"
29 extern struct rtnl_handle rth
;
31 static void usage(void) __attribute__((noreturn
));
33 static void usage(void)
35 fprintf(stderr
, "Usage: ip rule [ list | add | del | flush ] SELECTOR ACTION\n");
36 fprintf(stderr
, "SELECTOR := [ not ] [ from PREFIX ] [ to PREFIX ] [ tos TOS ] [ fwmark FWMARK[/MASK] ]\n");
37 fprintf(stderr
, " [ iif STRING ] [ oif STRING ] [ pref NUMBER ]\n");
38 fprintf(stderr
, "ACTION := [ table TABLE_ID ]\n");
39 fprintf(stderr
, " [ prohibit | reject | unreachable ]\n");
40 fprintf(stderr
, " [ realms [SRCREALM/]DSTREALM ]\n");
41 fprintf(stderr
, " [ goto NUMBER ]\n");
42 fprintf(stderr
, "TABLE_ID := [ local | main | default | NUMBER ]\n");
46 int print_rule(const struct sockaddr_nl
*who
, struct nlmsghdr
*n
, void *arg
)
48 FILE *fp
= (FILE*)arg
;
49 struct rtmsg
*r
= NLMSG_DATA(n
);
50 int len
= n
->nlmsg_len
;
53 struct rtattr
* tb
[FRA_MAX
+1];
57 if (n
->nlmsg_type
!= RTM_NEWRULE
&& n
->nlmsg_type
!= RTM_DELRULE
)
60 len
-= NLMSG_LENGTH(sizeof(*r
));
64 parse_rtattr(tb
, FRA_MAX
, RTM_RTA(r
), len
);
66 if (r
->rtm_family
== AF_INET
)
68 else if (r
->rtm_family
== AF_INET6
)
70 else if (r
->rtm_family
== AF_DECnet
)
72 else if (r
->rtm_family
== AF_IPX
)
75 if (n
->nlmsg_type
== RTM_DELRULE
)
76 fprintf(fp
, "Deleted ");
79 fprintf(fp
, "%u:\t", *(unsigned*)RTA_DATA(tb
[FRA_PRIORITY
]));
83 if (r
->rtm_flags
& FIB_RULE_INVERT
)
87 if (r
->rtm_src_len
!= host_len
) {
88 fprintf(fp
, "from %s/%u ", rt_addr_n2a(r
->rtm_family
,
89 RTA_PAYLOAD(tb
[FRA_SRC
]),
90 RTA_DATA(tb
[FRA_SRC
]),
95 fprintf(fp
, "from %s ", format_host(r
->rtm_family
,
96 RTA_PAYLOAD(tb
[FRA_SRC
]),
97 RTA_DATA(tb
[FRA_SRC
]),
101 } else if (r
->rtm_src_len
) {
102 fprintf(fp
, "from 0/%d ", r
->rtm_src_len
);
104 fprintf(fp
, "from all ");
108 if (r
->rtm_dst_len
!= host_len
) {
109 fprintf(fp
, "to %s/%u ", rt_addr_n2a(r
->rtm_family
,
110 RTA_PAYLOAD(tb
[FRA_DST
]),
111 RTA_DATA(tb
[FRA_DST
]),
116 fprintf(fp
, "to %s ", format_host(r
->rtm_family
,
117 RTA_PAYLOAD(tb
[FRA_DST
]),
118 RTA_DATA(tb
[FRA_DST
]),
119 abuf
, sizeof(abuf
)));
121 } else if (r
->rtm_dst_len
) {
122 fprintf(fp
, "to 0/%d ", r
->rtm_dst_len
);
127 fprintf(fp
, "tos %s ", rtnl_dsfield_n2a(r
->rtm_tos
, b1
, sizeof(b1
)));
130 if (tb
[FRA_FWMARK
] || tb
[FRA_FWMASK
]) {
131 __u32 mark
= 0, mask
= 0;
134 mark
= *(__u32
*)RTA_DATA(tb
[FRA_FWMARK
]);
136 if (tb
[FRA_FWMASK
] &&
137 (mask
= *(__u32
*)RTA_DATA(tb
[FRA_FWMASK
])) != 0xFFFFFFFF)
138 fprintf(fp
, "fwmark 0x%x/0x%x ", mark
, mask
);
140 fprintf(fp
, "fwmark 0x%x ", mark
);
143 if (tb
[FRA_IFNAME
]) {
144 fprintf(fp
, "iif %s ", (char*)RTA_DATA(tb
[FRA_IFNAME
]));
145 if (r
->rtm_flags
& FIB_RULE_IIF_DETACHED
)
146 fprintf(fp
, "[detached] ");
149 if (tb
[FRA_OIFNAME
]) {
150 fprintf(fp
, "oif %s ", (char*)RTA_DATA(tb
[FRA_OIFNAME
]));
151 if (r
->rtm_flags
& FIB_RULE_OIF_DETACHED
)
152 fprintf(fp
, "[detached] ");
155 table
= rtm_get_table(r
, tb
);
157 fprintf(fp
, "lookup %s ", rtnl_rttable_n2a(table
, b1
, sizeof(b1
)));
160 __u32 to
= *(__u32
*)RTA_DATA(tb
[FRA_FLOW
]);
164 fprintf(fp
, "realms %s/",
165 rtnl_rtrealm_n2a(from
, b1
, sizeof(b1
)));
168 rtnl_rtrealm_n2a(to
, b1
, sizeof(b1
)));
171 if (r
->rtm_type
== RTN_NAT
) {
172 if (tb
[RTA_GATEWAY
]) {
173 fprintf(fp
, "map-to %s ",
174 format_host(r
->rtm_family
,
175 RTA_PAYLOAD(tb
[RTA_GATEWAY
]),
176 RTA_DATA(tb
[RTA_GATEWAY
]),
177 abuf
, sizeof(abuf
)));
179 fprintf(fp
, "masquerade");
180 } else if (r
->rtm_type
== FR_ACT_GOTO
) {
181 fprintf(fp
, "goto ");
183 fprintf(fp
, "%u", *(__u32
*) RTA_DATA(tb
[FRA_GOTO
]));
186 if (r
->rtm_flags
& FIB_RULE_UNRESOLVED
)
187 fprintf(fp
, " [unresolved]");
188 } else if (r
->rtm_type
== FR_ACT_NOP
)
190 else if (r
->rtm_type
!= RTN_UNICAST
)
191 fprintf(fp
, "%s", rtnl_rtntype_n2a(r
->rtm_type
, b1
, sizeof(b1
)));
198 static int iprule_list(int argc
, char **argv
)
200 int af
= preferred_family
;
206 fprintf(stderr
, "\"ip rule show\" does not take any arguments.\n");
210 if (rtnl_wilddump_request(&rth
, af
, RTM_GETRULE
) < 0) {
211 perror("Cannot send dump request");
215 if (rtnl_dump_filter(&rth
, print_rule
, stdout
, NULL
, NULL
) < 0) {
216 fprintf(stderr
, "Dump terminated\n");
224 static int iprule_modify(int cmd
, int argc
, char **argv
)
233 memset(&req
, 0, sizeof(req
));
235 req
.n
.nlmsg_type
= cmd
;
236 req
.n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct rtmsg
));
237 req
.n
.nlmsg_flags
= NLM_F_REQUEST
;
238 req
.r
.rtm_family
= preferred_family
;
239 req
.r
.rtm_protocol
= RTPROT_BOOT
;
240 req
.r
.rtm_scope
= RT_SCOPE_UNIVERSE
;
242 req
.r
.rtm_type
= RTN_UNSPEC
;
245 if (cmd
== RTM_NEWRULE
) {
246 req
.n
.nlmsg_flags
|= NLM_F_CREATE
|NLM_F_EXCL
;
247 req
.r
.rtm_type
= RTN_UNICAST
;
251 if (strcmp(*argv
, "not") == 0) {
252 req
.r
.rtm_flags
|= FIB_RULE_INVERT
;
253 } else if (strcmp(*argv
, "from") == 0) {
256 get_prefix(&dst
, *argv
, req
.r
.rtm_family
);
257 req
.r
.rtm_src_len
= dst
.bitlen
;
258 addattr_l(&req
.n
, sizeof(req
), FRA_SRC
, &dst
.data
, dst
.bytelen
);
259 } else if (strcmp(*argv
, "to") == 0) {
262 get_prefix(&dst
, *argv
, req
.r
.rtm_family
);
263 req
.r
.rtm_dst_len
= dst
.bitlen
;
264 addattr_l(&req
.n
, sizeof(req
), FRA_DST
, &dst
.data
, dst
.bytelen
);
265 } else if (matches(*argv
, "preference") == 0 ||
266 matches(*argv
, "order") == 0 ||
267 matches(*argv
, "priority") == 0) {
270 if (get_u32(&pref
, *argv
, 0))
271 invarg("preference value is invalid\n", *argv
);
272 addattr32(&req
.n
, sizeof(req
), FRA_PRIORITY
, pref
);
273 } else if (strcmp(*argv
, "tos") == 0) {
276 if (rtnl_dsfield_a2n(&tos
, *argv
))
277 invarg("TOS value is invalid\n", *argv
);
279 } else if (strcmp(*argv
, "fwmark") == 0) {
281 __u32 fwmark
, fwmask
;
283 if ((slash
= strchr(*argv
, '/')) != NULL
)
285 if (get_u32(&fwmark
, *argv
, 0))
286 invarg("fwmark value is invalid\n", *argv
);
287 addattr32(&req
.n
, sizeof(req
), FRA_FWMARK
, fwmark
);
289 if (get_u32(&fwmask
, slash
+1, 0))
290 invarg("fwmask value is invalid\n", slash
+1);
291 addattr32(&req
.n
, sizeof(req
), FRA_FWMASK
, fwmask
);
293 } else if (matches(*argv
, "realms") == 0) {
296 if (get_rt_realms(&realm
, *argv
))
297 invarg("invalid realms\n", *argv
);
298 addattr32(&req
.n
, sizeof(req
), FRA_FLOW
, realm
);
299 } else if (matches(*argv
, "table") == 0 ||
300 strcmp(*argv
, "lookup") == 0) {
303 if (rtnl_rttable_a2n(&tid
, *argv
))
304 invarg("invalid table ID\n", *argv
);
306 req
.r
.rtm_table
= tid
;
308 req
.r
.rtm_table
= RT_TABLE_UNSPEC
;
309 addattr32(&req
.n
, sizeof(req
), FRA_TABLE
, tid
);
312 } else if (strcmp(*argv
, "dev") == 0 ||
313 strcmp(*argv
, "iif") == 0) {
315 addattr_l(&req
.n
, sizeof(req
), FRA_IFNAME
, *argv
, strlen(*argv
)+1);
316 } else if (strcmp(*argv
, "oif") == 0) {
318 addattr_l(&req
.n
, sizeof(req
), FRA_OIFNAME
, *argv
, strlen(*argv
)+1);
319 } else if (strcmp(*argv
, "nat") == 0 ||
320 matches(*argv
, "map-to") == 0) {
322 fprintf(stderr
, "Warning: route NAT is deprecated\n");
323 addattr32(&req
.n
, sizeof(req
), RTA_GATEWAY
, get_addr32(*argv
));
324 req
.r
.rtm_type
= RTN_NAT
;
328 if (strcmp(*argv
, "type") == 0) {
331 if (matches(*argv
, "help") == 0)
333 else if (matches(*argv
, "goto") == 0) {
337 if (get_u32(&target
, *argv
, 0))
338 invarg("invalid target\n", *argv
);
339 addattr32(&req
.n
, sizeof(req
), FRA_GOTO
, target
);
340 } else if (matches(*argv
, "nop") == 0)
342 else if (rtnl_rtntype_a2n(&type
, *argv
))
343 invarg("Failed to parse rule type", *argv
);
344 req
.r
.rtm_type
= type
;
351 if (req
.r
.rtm_family
== AF_UNSPEC
)
352 req
.r
.rtm_family
= AF_INET
;
354 if (!table_ok
&& cmd
== RTM_NEWRULE
)
355 req
.r
.rtm_table
= RT_TABLE_MAIN
;
357 if (rtnl_talk(&rth
, &req
.n
, 0, 0, NULL
, NULL
, NULL
) < 0)
364 static int flush_rule(const struct sockaddr_nl
*who
, struct nlmsghdr
*n
, void *arg
)
366 struct rtnl_handle rth2
;
367 struct rtmsg
*r
= NLMSG_DATA(n
);
368 int len
= n
->nlmsg_len
;
369 struct rtattr
* tb
[FRA_MAX
+1];
371 len
-= NLMSG_LENGTH(sizeof(*r
));
375 parse_rtattr(tb
, FRA_MAX
, RTM_RTA(r
), len
);
377 if (tb
[FRA_PRIORITY
]) {
378 n
->nlmsg_type
= RTM_DELRULE
;
379 n
->nlmsg_flags
= NLM_F_REQUEST
;
381 if (rtnl_open(&rth2
, 0) < 0)
384 if (rtnl_talk(&rth2
, n
, 0, 0, NULL
, NULL
, NULL
) < 0)
393 static int iprule_flush(int argc
, char **argv
)
395 int af
= preferred_family
;
401 fprintf(stderr
, "\"ip rule flush\" does not allow arguments\n");
405 if (rtnl_wilddump_request(&rth
, af
, RTM_GETRULE
) < 0) {
406 perror("Cannot send dump request");
410 if (rtnl_dump_filter(&rth
, flush_rule
, NULL
, NULL
, NULL
) < 0) {
411 fprintf(stderr
, "Flush terminated\n");
418 int do_iprule(int argc
, char **argv
)
421 return iprule_list(0, NULL
);
422 } else if (matches(argv
[0], "list") == 0 ||
423 matches(argv
[0], "lst") == 0 ||
424 matches(argv
[0], "show") == 0) {
425 return iprule_list(argc
-1, argv
+1);
426 } else if (matches(argv
[0], "add") == 0) {
427 return iprule_modify(RTM_NEWRULE
, argc
-1, argv
+1);
428 } else if (matches(argv
[0], "delete") == 0) {
429 return iprule_modify(RTM_DELRULE
, argc
-1, argv
+1);
430 } else if (matches(argv
[0], "flush") == 0) {
431 return iprule_flush(argc
-1, argv
+1);
432 } else if (matches(argv
[0], "help") == 0)
435 fprintf(stderr
, "Command \"%s\" is unknown, try \"ip rule help\".\n", *argv
);