]>
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>
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
, " SUPPRESSOR\n");
43 fprintf(stderr
, "SUPPRESSOR := [ suppress_prefixlength NUMBER ]\n");
44 fprintf(stderr
, " [ suppress_ifgroup DEVGROUP ]\n");
45 fprintf(stderr
, "TABLE_ID := [ local | main | default | NUMBER ]\n");
49 int print_rule(const struct sockaddr_nl
*who
, struct nlmsghdr
*n
, void *arg
)
51 FILE *fp
= (FILE*)arg
;
52 struct rtmsg
*r
= NLMSG_DATA(n
);
53 int len
= n
->nlmsg_len
;
56 struct rtattr
* tb
[FRA_MAX
+1];
60 if (n
->nlmsg_type
!= RTM_NEWRULE
&& n
->nlmsg_type
!= RTM_DELRULE
)
63 len
-= NLMSG_LENGTH(sizeof(*r
));
67 parse_rtattr(tb
, FRA_MAX
, RTM_RTA(r
), len
);
69 if (r
->rtm_family
== AF_INET
)
71 else if (r
->rtm_family
== AF_INET6
)
73 else if (r
->rtm_family
== AF_DECnet
)
75 else if (r
->rtm_family
== AF_IPX
)
78 if (n
->nlmsg_type
== RTM_DELRULE
)
79 fprintf(fp
, "Deleted ");
82 fprintf(fp
, "%u:\t", *(unsigned*)RTA_DATA(tb
[FRA_PRIORITY
]));
86 if (r
->rtm_flags
& FIB_RULE_INVERT
)
90 if (r
->rtm_src_len
!= host_len
) {
91 fprintf(fp
, "from %s/%u ", rt_addr_n2a(r
->rtm_family
,
92 RTA_PAYLOAD(tb
[FRA_SRC
]),
93 RTA_DATA(tb
[FRA_SRC
]),
98 fprintf(fp
, "from %s ", format_host(r
->rtm_family
,
99 RTA_PAYLOAD(tb
[FRA_SRC
]),
100 RTA_DATA(tb
[FRA_SRC
]),
104 } else if (r
->rtm_src_len
) {
105 fprintf(fp
, "from 0/%d ", r
->rtm_src_len
);
107 fprintf(fp
, "from all ");
111 if (r
->rtm_dst_len
!= host_len
) {
112 fprintf(fp
, "to %s/%u ", rt_addr_n2a(r
->rtm_family
,
113 RTA_PAYLOAD(tb
[FRA_DST
]),
114 RTA_DATA(tb
[FRA_DST
]),
119 fprintf(fp
, "to %s ", format_host(r
->rtm_family
,
120 RTA_PAYLOAD(tb
[FRA_DST
]),
121 RTA_DATA(tb
[FRA_DST
]),
122 abuf
, sizeof(abuf
)));
124 } else if (r
->rtm_dst_len
) {
125 fprintf(fp
, "to 0/%d ", r
->rtm_dst_len
);
130 fprintf(fp
, "tos %s ", rtnl_dsfield_n2a(r
->rtm_tos
, b1
, sizeof(b1
)));
133 if (tb
[FRA_FWMARK
] || tb
[FRA_FWMASK
]) {
134 __u32 mark
= 0, mask
= 0;
137 mark
= rta_getattr_u32(tb
[FRA_FWMARK
]);
139 if (tb
[FRA_FWMASK
] &&
140 (mask
= rta_getattr_u32(tb
[FRA_FWMASK
])) != 0xFFFFFFFF)
141 fprintf(fp
, "fwmark 0x%x/0x%x ", mark
, mask
);
143 fprintf(fp
, "fwmark 0x%x ", mark
);
146 if (tb
[FRA_IFNAME
]) {
147 fprintf(fp
, "iif %s ", rta_getattr_str(tb
[FRA_IFNAME
]));
148 if (r
->rtm_flags
& FIB_RULE_IIF_DETACHED
)
149 fprintf(fp
, "[detached] ");
152 if (tb
[FRA_OIFNAME
]) {
153 fprintf(fp
, "oif %s ", rta_getattr_str(tb
[FRA_OIFNAME
]));
154 if (r
->rtm_flags
& FIB_RULE_OIF_DETACHED
)
155 fprintf(fp
, "[detached] ");
158 table
= rtm_get_table(r
, tb
);
160 fprintf(fp
, "lookup %s ", rtnl_rttable_n2a(table
, b1
, sizeof(b1
)));
162 if (tb
[FRA_SUPPRESS_PREFIXLEN
]) {
163 int pl
= rta_getattr_u32(tb
[FRA_SUPPRESS_PREFIXLEN
]);
165 fprintf(fp
, "suppress_prefixlength %d ", pl
);
168 if (tb
[FRA_SUPPRESS_IFGROUP
]) {
169 int group
= rta_getattr_u32(tb
[FRA_SUPPRESS_IFGROUP
]);
172 fprintf(fp
, "suppress_ifgroup %s ", rtnl_group_n2a(group
, b1
, sizeof(b1
)));
178 __u32 to
= rta_getattr_u32(tb
[FRA_FLOW
]);
182 fprintf(fp
, "realms %s/",
183 rtnl_rtrealm_n2a(from
, b1
, sizeof(b1
)));
186 rtnl_rtrealm_n2a(to
, b1
, sizeof(b1
)));
189 if (r
->rtm_type
== RTN_NAT
) {
190 if (tb
[RTA_GATEWAY
]) {
191 fprintf(fp
, "map-to %s ",
192 format_host(r
->rtm_family
,
193 RTA_PAYLOAD(tb
[RTA_GATEWAY
]),
194 RTA_DATA(tb
[RTA_GATEWAY
]),
195 abuf
, sizeof(abuf
)));
197 fprintf(fp
, "masquerade");
198 } else if (r
->rtm_type
== FR_ACT_GOTO
) {
199 fprintf(fp
, "goto ");
201 fprintf(fp
, "%u", rta_getattr_u32(tb
[FRA_GOTO
]));
204 if (r
->rtm_flags
& FIB_RULE_UNRESOLVED
)
205 fprintf(fp
, " [unresolved]");
206 } else if (r
->rtm_type
== FR_ACT_NOP
)
208 else if (r
->rtm_type
!= RTN_UNICAST
)
209 fprintf(fp
, "%s", rtnl_rtntype_n2a(r
->rtm_type
, b1
, sizeof(b1
)));
216 static int iprule_list(int argc
, char **argv
)
218 int af
= preferred_family
;
224 fprintf(stderr
, "\"ip rule show\" does not take any arguments.\n");
228 if (rtnl_wilddump_request(&rth
, af
, RTM_GETRULE
) < 0) {
229 perror("Cannot send dump request");
233 if (rtnl_dump_filter(&rth
, print_rule
, stdout
) < 0) {
234 fprintf(stderr
, "Dump terminated\n");
242 static int iprule_modify(int cmd
, int argc
, char **argv
)
251 memset(&req
, 0, sizeof(req
));
253 req
.n
.nlmsg_type
= cmd
;
254 req
.n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct rtmsg
));
255 req
.n
.nlmsg_flags
= NLM_F_REQUEST
;
256 req
.r
.rtm_family
= preferred_family
;
257 req
.r
.rtm_protocol
= RTPROT_BOOT
;
258 req
.r
.rtm_scope
= RT_SCOPE_UNIVERSE
;
260 req
.r
.rtm_type
= RTN_UNSPEC
;
263 if (cmd
== RTM_NEWRULE
) {
264 req
.n
.nlmsg_flags
|= NLM_F_CREATE
|NLM_F_EXCL
;
265 req
.r
.rtm_type
= RTN_UNICAST
;
269 if (strcmp(*argv
, "not") == 0) {
270 req
.r
.rtm_flags
|= FIB_RULE_INVERT
;
271 } else if (strcmp(*argv
, "from") == 0) {
274 get_prefix(&dst
, *argv
, req
.r
.rtm_family
);
275 req
.r
.rtm_src_len
= dst
.bitlen
;
276 addattr_l(&req
.n
, sizeof(req
), FRA_SRC
, &dst
.data
, dst
.bytelen
);
277 } else if (strcmp(*argv
, "to") == 0) {
280 get_prefix(&dst
, *argv
, req
.r
.rtm_family
);
281 req
.r
.rtm_dst_len
= dst
.bitlen
;
282 addattr_l(&req
.n
, sizeof(req
), FRA_DST
, &dst
.data
, dst
.bytelen
);
283 } else if (matches(*argv
, "preference") == 0 ||
284 matches(*argv
, "order") == 0 ||
285 matches(*argv
, "priority") == 0) {
288 if (get_u32(&pref
, *argv
, 0))
289 invarg("preference value is invalid\n", *argv
);
290 addattr32(&req
.n
, sizeof(req
), FRA_PRIORITY
, pref
);
291 } else if (strcmp(*argv
, "tos") == 0 ||
292 matches(*argv
, "dsfield") == 0) {
295 if (rtnl_dsfield_a2n(&tos
, *argv
))
296 invarg("TOS value is invalid\n", *argv
);
298 } else if (strcmp(*argv
, "fwmark") == 0) {
300 __u32 fwmark
, fwmask
;
302 if ((slash
= strchr(*argv
, '/')) != NULL
)
304 if (get_u32(&fwmark
, *argv
, 0))
305 invarg("fwmark value is invalid\n", *argv
);
306 addattr32(&req
.n
, sizeof(req
), FRA_FWMARK
, fwmark
);
308 if (get_u32(&fwmask
, slash
+1, 0))
309 invarg("fwmask value is invalid\n", slash
+1);
310 addattr32(&req
.n
, sizeof(req
), FRA_FWMASK
, fwmask
);
312 } else if (matches(*argv
, "realms") == 0) {
315 if (get_rt_realms(&realm
, *argv
))
316 invarg("invalid realms\n", *argv
);
317 addattr32(&req
.n
, sizeof(req
), FRA_FLOW
, realm
);
318 } else if (matches(*argv
, "table") == 0 ||
319 strcmp(*argv
, "lookup") == 0) {
322 if (rtnl_rttable_a2n(&tid
, *argv
))
323 invarg("invalid table ID\n", *argv
);
325 req
.r
.rtm_table
= tid
;
327 req
.r
.rtm_table
= RT_TABLE_UNSPEC
;
328 addattr32(&req
.n
, sizeof(req
), FRA_TABLE
, tid
);
331 } else if (matches(*argv
, "suppress_prefixlength") == 0 ||
332 strcmp(*argv
, "sup_pl") == 0) {
335 if (get_s32(&pl
, *argv
, 0) || pl
< 0)
336 invarg("suppress_prefixlength value is invalid\n", *argv
);
337 addattr32(&req
.n
, sizeof(req
), FRA_SUPPRESS_PREFIXLEN
, pl
);
338 } else if (matches(*argv
, "suppress_ifgroup") == 0 ||
339 strcmp(*argv
, "sup_group") == 0) {
342 if (rtnl_group_a2n(&group
, *argv
))
343 invarg("Invalid \"suppress_ifgroup\" value\n", *argv
);
344 addattr32(&req
.n
, sizeof(req
), FRA_SUPPRESS_IFGROUP
, group
);
345 } else if (strcmp(*argv
, "dev") == 0 ||
346 strcmp(*argv
, "iif") == 0) {
348 addattr_l(&req
.n
, sizeof(req
), FRA_IFNAME
, *argv
, strlen(*argv
)+1);
349 } else if (strcmp(*argv
, "oif") == 0) {
351 addattr_l(&req
.n
, sizeof(req
), FRA_OIFNAME
, *argv
, strlen(*argv
)+1);
352 } else if (strcmp(*argv
, "nat") == 0 ||
353 matches(*argv
, "map-to") == 0) {
355 fprintf(stderr
, "Warning: route NAT is deprecated\n");
356 addattr32(&req
.n
, sizeof(req
), RTA_GATEWAY
, get_addr32(*argv
));
357 req
.r
.rtm_type
= RTN_NAT
;
361 if (strcmp(*argv
, "type") == 0) {
364 if (matches(*argv
, "help") == 0)
366 else if (matches(*argv
, "goto") == 0) {
370 if (get_u32(&target
, *argv
, 0))
371 invarg("invalid target\n", *argv
);
372 addattr32(&req
.n
, sizeof(req
), FRA_GOTO
, target
);
373 } else if (matches(*argv
, "nop") == 0)
375 else if (rtnl_rtntype_a2n(&type
, *argv
))
376 invarg("Failed to parse rule type", *argv
);
377 req
.r
.rtm_type
= type
;
384 if (req
.r
.rtm_family
== AF_UNSPEC
)
385 req
.r
.rtm_family
= AF_INET
;
387 if (!table_ok
&& cmd
== RTM_NEWRULE
)
388 req
.r
.rtm_table
= RT_TABLE_MAIN
;
390 if (rtnl_talk(&rth
, &req
.n
, 0, 0, NULL
) < 0)
397 static int flush_rule(const struct sockaddr_nl
*who
, struct nlmsghdr
*n
, void *arg
)
399 struct rtnl_handle rth2
;
400 struct rtmsg
*r
= NLMSG_DATA(n
);
401 int len
= n
->nlmsg_len
;
402 struct rtattr
* tb
[FRA_MAX
+1];
404 len
-= NLMSG_LENGTH(sizeof(*r
));
408 parse_rtattr(tb
, FRA_MAX
, RTM_RTA(r
), len
);
410 if (tb
[FRA_PRIORITY
]) {
411 n
->nlmsg_type
= RTM_DELRULE
;
412 n
->nlmsg_flags
= NLM_F_REQUEST
;
414 if (rtnl_open(&rth2
, 0) < 0)
417 if (rtnl_talk(&rth2
, n
, 0, 0, NULL
) < 0)
426 static int iprule_flush(int argc
, char **argv
)
428 int af
= preferred_family
;
434 fprintf(stderr
, "\"ip rule flush\" does not allow arguments\n");
438 if (rtnl_wilddump_request(&rth
, af
, RTM_GETRULE
) < 0) {
439 perror("Cannot send dump request");
443 if (rtnl_dump_filter(&rth
, flush_rule
, NULL
) < 0) {
444 fprintf(stderr
, "Flush terminated\n");
451 int do_iprule(int argc
, char **argv
)
454 return iprule_list(0, NULL
);
455 } else if (matches(argv
[0], "list") == 0 ||
456 matches(argv
[0], "lst") == 0 ||
457 matches(argv
[0], "show") == 0) {
458 return iprule_list(argc
-1, argv
+1);
459 } else if (matches(argv
[0], "add") == 0) {
460 return iprule_modify(RTM_NEWRULE
, argc
-1, argv
+1);
461 } else if (matches(argv
[0], "delete") == 0) {
462 return iprule_modify(RTM_DELRULE
, argc
-1, argv
+1);
463 } else if (matches(argv
[0], "flush") == 0) {
464 return iprule_flush(argc
-1, argv
+1);
465 } else if (matches(argv
[0], "help") == 0)
468 fprintf(stderr
, "Command \"%s\" is unknown, try \"ip rule help\".\n", *argv
);
472 int do_multirule(int argc
, char **argv
)
474 switch (preferred_family
) {
477 preferred_family
= RTNL_FAMILY_IPMR
;
480 preferred_family
= RTNL_FAMILY_IP6MR
;
482 case RTNL_FAMILY_IPMR
:
483 case RTNL_FAMILY_IP6MR
:
486 fprintf(stderr
, "Multicast rules are only supported for IPv4/IPv6, was: %i\n",
491 return do_iprule(argc
, argv
);