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13#include <stdio.h>
14#include <stdlib.h>
15#include <unistd.h>
16#include <fcntl.h>
17#include <sys/socket.h>
18#include <netinet/in.h>
19#include <netinet/ip.h>
20#include <arpa/inet.h>
21#include <string.h>
22#include <linux/if.h>
23#include <linux/fib_rules.h>
24#include <errno.h>
25
26#include "rt_names.h"
27#include "utils.h"
28#include "ip_common.h"
29#include "json_print.h"
30
31enum list_action {
32 IPRULE_LIST,
33 IPRULE_FLUSH,
34 IPRULE_SAVE,
35};
36
37extern struct rtnl_handle rth;
38
39static void usage(void) __attribute__((noreturn));
40
41static void usage(void)
42{
43 fprintf(stderr,
44 "Usage: ip rule { add | del } SELECTOR ACTION\n"
45 " ip rule { flush | save | restore }\n"
46 " ip rule [ list [ SELECTOR ]]\n"
47 "SELECTOR := [ not ] [ from PREFIX ] [ to PREFIX ] [ tos TOS ]\n"
48 " [ fwmark FWMARK[/MASK] ]\n"
49 " [ iif STRING ] [ oif STRING ] [ pref NUMBER ] [ l3mdev ]\n"
50 " [ uidrange NUMBER-NUMBER ]\n"
51 " [ ipproto PROTOCOL ]\n"
52 " [ sport [ NUMBER | NUMBER-NUMBER ]\n"
53 " [ dport [ NUMBER | NUMBER-NUMBER ] ]\n"
54 "ACTION := [ table TABLE_ID ]\n"
55 " [ protocol PROTO ]\n"
56 " [ nat ADDRESS ]\n"
57 " [ realms [SRCREALM/]DSTREALM ]\n"
58 " [ goto NUMBER ]\n"
59 " SUPPRESSOR\n"
60 "SUPPRESSOR := [ suppress_prefixlength NUMBER ]\n"
61 " [ suppress_ifgroup DEVGROUP ]\n"
62 "TABLE_ID := [ local | main | default | NUMBER ]\n");
63 exit(-1);
64}
65
66static struct
67{
68 int not;
69 int l3mdev;
70 int iifmask, oifmask, uidrange;
71 unsigned int tb;
72 unsigned int tos, tosmask;
73 unsigned int pref, prefmask;
74 unsigned int fwmark, fwmask;
75 uint64_t tun_id;
76 char iif[IFNAMSIZ];
77 char oif[IFNAMSIZ];
78 struct fib_rule_uid_range range;
79 inet_prefix src;
80 inet_prefix dst;
81 int protocol;
82 int protocolmask;
83 struct fib_rule_port_range sport;
84 struct fib_rule_port_range dport;
85 __u8 ipproto;
86} filter;
87
88static inline int frh_get_table(struct fib_rule_hdr *frh, struct rtattr **tb)
89{
90 __u32 table = frh->table;
91 if (tb[RTA_TABLE])
92 table = rta_getattr_u32(tb[RTA_TABLE]);
93 return table;
94}
95
96static bool filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
97{
98 struct fib_rule_hdr *frh = NLMSG_DATA(n);
99 __u32 table;
100
101 if (preferred_family != AF_UNSPEC && frh->family != preferred_family)
102 return false;
103
104 if (filter.prefmask &&
105 filter.pref ^ (tb[FRA_PRIORITY] ? rta_getattr_u32(tb[FRA_PRIORITY]) : 0))
106 return false;
107 if (filter.not && !(frh->flags & FIB_RULE_INVERT))
108 return false;
109
110 if (filter.src.family) {
111 inet_prefix *f_src = &filter.src;
112
113 if (f_src->family != frh->family ||
114 f_src->bitlen > frh->src_len)
115 return false;
116
117 if (inet_addr_match_rta(f_src, tb[FRA_SRC]))
118 return false;
119 }
120
121 if (filter.dst.family) {
122 inet_prefix *f_dst = &filter.dst;
123
124 if (f_dst->family != frh->family ||
125 f_dst->bitlen > frh->dst_len)
126 return false;
127
128 if (inet_addr_match_rta(f_dst, tb[FRA_DST]))
129 return false;
130 }
131
132 if (filter.tosmask && filter.tos ^ frh->tos)
133 return false;
134
135 if (filter.fwmark) {
136 __u32 mark = 0;
137
138 if (tb[FRA_FWMARK])
139 mark = rta_getattr_u32(tb[FRA_FWMARK]);
140 if (filter.fwmark ^ mark)
141 return false;
142 }
143 if (filter.fwmask) {
144 __u32 mask = 0;
145
146 if (tb[FRA_FWMASK])
147 mask = rta_getattr_u32(tb[FRA_FWMASK]);
148 if (filter.fwmask ^ mask)
149 return false;
150 }
151
152 if (filter.iifmask) {
153 if (tb[FRA_IFNAME]) {
154 if (strcmp(filter.iif, rta_getattr_str(tb[FRA_IFNAME])) != 0)
155 return false;
156 } else {
157 return false;
158 }
159 }
160
161 if (filter.oifmask) {
162 if (tb[FRA_OIFNAME]) {
163 if (strcmp(filter.oif, rta_getattr_str(tb[FRA_OIFNAME])) != 0)
164 return false;
165 } else {
166 return false;
167 }
168 }
169
170 if (filter.l3mdev && !(tb[FRA_L3MDEV] && rta_getattr_u8(tb[FRA_L3MDEV])))
171 return false;
172
173 if (filter.uidrange) {
174 struct fib_rule_uid_range *r = RTA_DATA(tb[FRA_UID_RANGE]);
175
176 if (!tb[FRA_UID_RANGE] ||
177 r->start != filter.range.start ||
178 r->end != filter.range.end)
179 return false;
180 }
181
182 if (filter.ipproto) {
183 __u8 ipproto = 0;
184
185 if (tb[FRA_IP_PROTO])
186 ipproto = rta_getattr_u8(tb[FRA_IP_PROTO]);
187 if (filter.ipproto != ipproto)
188 return false;
189 }
190
191 if (filter.sport.start) {
192 const struct fib_rule_port_range *r;
193
194 if (!tb[FRA_SPORT_RANGE])
195 return false;
196
197 r = RTA_DATA(tb[FRA_SPORT_RANGE]);
198 if (r->start != filter.sport.start ||
199 r->end != filter.sport.end)
200 return false;
201 }
202
203 if (filter.dport.start) {
204 const struct fib_rule_port_range *r;
205
206 if (!tb[FRA_DPORT_RANGE])
207 return false;
208
209 r = RTA_DATA(tb[FRA_DPORT_RANGE]);
210 if (r->start != filter.dport.start ||
211 r->end != filter.dport.end)
212 return false;
213 }
214
215 if (filter.tun_id) {
216 __u64 tun_id = 0;
217
218 if (tb[FRA_TUN_ID]) {
219 tun_id = ntohll(rta_getattr_u64(tb[FRA_TUN_ID]));
220 if (filter.tun_id != tun_id)
221 return false;
222 } else {
223 return false;
224 }
225 }
226
227 table = frh_get_table(frh, tb);
228 if (filter.tb > 0 && filter.tb ^ table)
229 return false;
230
231 return true;
232}
233
234int print_rule(struct nlmsghdr *n, void *arg)
235{
236 FILE *fp = arg;
237 struct fib_rule_hdr *frh = NLMSG_DATA(n);
238 int len = n->nlmsg_len;
239 int host_len = -1;
240 __u32 table, prio = 0;
241 struct rtattr *tb[FRA_MAX+1];
242 SPRINT_BUF(b1);
243
244 if (n->nlmsg_type != RTM_NEWRULE && n->nlmsg_type != RTM_DELRULE)
245 return 0;
246
247 len -= NLMSG_LENGTH(sizeof(*frh));
248 if (len < 0)
249 return -1;
250
251 parse_rtattr(tb, FRA_MAX, RTM_RTA(frh), len);
252
253 host_len = af_bit_len(frh->family);
254
255 if (!filter_nlmsg(n, tb, host_len))
256 return 0;
257
258 open_json_object(NULL);
259 if (n->nlmsg_type == RTM_DELRULE)
260 print_bool(PRINT_ANY, "deleted", "Deleted ", true);
261
262 if (tb[FRA_PRIORITY])
263 prio = rta_getattr_u32(tb[FRA_PRIORITY]);
264
265 print_uint(PRINT_ANY, "priority", "%u:\t", prio);
266
267 if (frh->flags & FIB_RULE_INVERT)
268 print_null(PRINT_ANY, "not", "not ", NULL);
269
270 if (tb[FRA_SRC]) {
271 const char *src = rt_addr_n2a_rta(frh->family, tb[FRA_SRC]);
272
273 print_string(PRINT_FP, NULL, "from ", NULL);
274 print_color_string(PRINT_ANY, ifa_family_color(frh->family),
275 "src", "%s", src);
276 if (frh->src_len != host_len)
277 print_uint(PRINT_ANY, "srclen", "/%u", frh->src_len);
278 } else if (frh->src_len) {
279 print_string(PRINT_ANY, "src", "from %s", "0");
280 print_uint(PRINT_ANY, "srclen", "/%u", frh->src_len);
281 } else {
282 print_string(PRINT_ANY, "src", "from %s", "all");
283 }
284
285 if (tb[FRA_DST]) {
286 const char *dst = rt_addr_n2a_rta(frh->family, tb[FRA_DST]);
287
288 print_string(PRINT_FP, NULL, " to ", NULL);
289 print_color_string(PRINT_ANY, ifa_family_color(frh->family),
290 "dst", "%s", dst);
291 if (frh->dst_len != host_len)
292 print_uint(PRINT_ANY, "dstlen", "/%u", frh->dst_len);
293 } else if (frh->dst_len) {
294 print_string(PRINT_ANY, "dst", " to %s", "0");
295 print_uint(PRINT_ANY, "dstlen", "/%u", frh->dst_len);
296 }
297
298 if (frh->tos) {
299 print_string(PRINT_ANY, "tos",
300 " tos %s",
301 rtnl_dsfield_n2a(frh->tos, b1, sizeof(b1)));
302 }
303
304 if (tb[FRA_FWMARK] || tb[FRA_FWMASK]) {
305 __u32 mark = 0, mask = 0;
306
307 if (tb[FRA_FWMARK])
308 mark = rta_getattr_u32(tb[FRA_FWMARK]);
309
310 if (tb[FRA_FWMASK] &&
311 (mask = rta_getattr_u32(tb[FRA_FWMASK])) != 0xFFFFFFFF) {
312 print_0xhex(PRINT_ANY, "fwmark", " fwmark %#llx", mark);
313 print_0xhex(PRINT_ANY, "fwmask", "/%#llx", mask);
314 } else {
315 print_0xhex(PRINT_ANY, "fwmark", " fwmark %#llx", mark);
316 }
317 }
318
319 if (tb[FRA_IFNAME]) {
320 if (!is_json_context())
321 fprintf(fp, " iif ");
322 print_color_string(PRINT_ANY, COLOR_IFNAME,
323 "iif", "%s",
324 rta_getattr_str(tb[FRA_IFNAME]));
325
326 if (frh->flags & FIB_RULE_IIF_DETACHED)
327 print_null(PRINT_ANY, "iif_detached", " [detached]",
328 NULL);
329 }
330
331 if (tb[FRA_OIFNAME]) {
332 if (!is_json_context())
333 fprintf(fp, " oif ");
334
335 print_color_string(PRINT_ANY, COLOR_IFNAME, "oif", "%s",
336 rta_getattr_str(tb[FRA_OIFNAME]));
337
338 if (frh->flags & FIB_RULE_OIF_DETACHED)
339 print_null(PRINT_ANY, "oif_detached", " [detached]",
340 NULL);
341 }
342
343 if (tb[FRA_L3MDEV]) {
344 __u8 mdev = rta_getattr_u8(tb[FRA_L3MDEV]);
345
346 if (mdev)
347 print_null(PRINT_ANY, "l3mdev",
348 " lookup [l3mdev-table]", NULL);
349 }
350
351 if (tb[FRA_UID_RANGE]) {
352 struct fib_rule_uid_range *r = RTA_DATA(tb[FRA_UID_RANGE]);
353
354 print_uint(PRINT_ANY, "uid_start", " uidrange %u", r->start);
355 print_uint(PRINT_ANY, "uid_end", "-%u", r->end);
356 }
357
358 if (tb[FRA_IP_PROTO]) {
359 SPRINT_BUF(pbuf);
360 print_string(PRINT_ANY, "ipproto", " ipproto %s",
361 inet_proto_n2a(rta_getattr_u8(tb[FRA_IP_PROTO]),
362 pbuf, sizeof(pbuf)));
363 }
364
365 if (tb[FRA_SPORT_RANGE]) {
366 struct fib_rule_port_range *r = RTA_DATA(tb[FRA_SPORT_RANGE]);
367
368 if (r->start == r->end) {
369 print_uint(PRINT_ANY, "sport", " sport %u", r->start);
370 } else {
371 print_uint(PRINT_ANY, "sport_start", " sport %u",
372 r->start);
373 print_uint(PRINT_ANY, "sport_end", "-%u", r->end);
374 }
375 }
376
377 if (tb[FRA_DPORT_RANGE]) {
378 struct fib_rule_port_range *r = RTA_DATA(tb[FRA_DPORT_RANGE]);
379
380 if (r->start == r->end) {
381 print_uint(PRINT_ANY, "dport", " dport %u", r->start);
382 } else {
383 print_uint(PRINT_ANY, "dport_start", " dport %u",
384 r->start);
385 print_uint(PRINT_ANY, "dport_end", "-%u", r->end);
386 }
387 }
388
389 if (tb[FRA_TUN_ID]) {
390 __u64 tun_id = ntohll(rta_getattr_u64(tb[FRA_TUN_ID]));
391
392 print_u64(PRINT_ANY, "tun_id", " tun_id %llu", tun_id);
393 }
394
395 table = frh_get_table(frh, tb);
396 if (table) {
397 print_string(PRINT_ANY, "table",
398 " lookup %s",
399 rtnl_rttable_n2a(table, b1, sizeof(b1)));
400
401 if (tb[FRA_SUPPRESS_PREFIXLEN]) {
402 int pl = rta_getattr_u32(tb[FRA_SUPPRESS_PREFIXLEN]);
403
404 if (pl != -1)
405 print_int(PRINT_ANY, "suppress_prefixlen",
406 " suppress_prefixlength %d", pl);
407 }
408
409 if (tb[FRA_SUPPRESS_IFGROUP]) {
410 int group = rta_getattr_u32(tb[FRA_SUPPRESS_IFGROUP]);
411
412 if (group != -1) {
413 const char *grname
414 = rtnl_group_n2a(group, b1, sizeof(b1));
415
416 print_string(PRINT_ANY, "suppress_ifgroup",
417 " suppress_ifgroup %s", grname);
418 }
419 }
420 }
421
422 if (tb[FRA_FLOW]) {
423 __u32 to = rta_getattr_u32(tb[FRA_FLOW]);
424 __u32 from = to>>16;
425
426 to &= 0xFFFF;
427 if (from)
428 print_string(PRINT_ANY,
429 "flow_from", " realms %s/",
430 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
431 else
432 print_string(PRINT_FP, NULL, " realms ", NULL);
433
434 print_string(PRINT_ANY, "flow_to", "%s",
435 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
436 }
437
438 if (frh->action == RTN_NAT) {
439 if (tb[RTA_GATEWAY]) {
440 const char *gateway;
441
442 gateway = format_host_rta(frh->family, tb[RTA_GATEWAY]);
443
444 print_string(PRINT_ANY, "nat_gateway",
445 " map-to %s", gateway);
446 } else {
447 print_null(PRINT_ANY, "masquerade", " masquerade", NULL);
448 }
449 } else if (frh->action == FR_ACT_GOTO) {
450 if (tb[FRA_GOTO])
451 print_uint(PRINT_ANY, "goto", " goto %u",
452 rta_getattr_u32(tb[FRA_GOTO]));
453 else
454 print_string(PRINT_ANY, "goto", " goto %s", "none");
455
456 if (frh->flags & FIB_RULE_UNRESOLVED)
457 print_null(PRINT_ANY, "unresolved",
458 " [unresolved]", NULL);
459 } else if (frh->action == FR_ACT_NOP) {
460 print_null(PRINT_ANY, "nop", " nop", NULL);
461 } else if (frh->action != FR_ACT_TO_TBL) {
462 print_string(PRINT_ANY, "action", " %s",
463 rtnl_rtntype_n2a(frh->action, b1, sizeof(b1)));
464 }
465
466 if (tb[FRA_PROTOCOL]) {
467 __u8 protocol = rta_getattr_u8(tb[FRA_PROTOCOL]);
468
469 if ((protocol && protocol != RTPROT_KERNEL) || show_details > 0) {
470 print_string(PRINT_ANY, "protocol", " proto %s",
471 rtnl_rtprot_n2a(protocol, b1, sizeof(b1)));
472 }
473 }
474 print_string(PRINT_FP, NULL, "\n", "");
475 close_json_object();
476 fflush(fp);
477 return 0;
478}
479
480static __u32 rule_dump_magic = 0x71706986;
481
482static int save_rule_prep(void)
483{
484 int ret;
485
486 if (isatty(STDOUT_FILENO)) {
487 fprintf(stderr, "Not sending a binary stream to stdout\n");
488 return -1;
489 }
490
491 ret = write(STDOUT_FILENO, &rule_dump_magic, sizeof(rule_dump_magic));
492 if (ret != sizeof(rule_dump_magic)) {
493 fprintf(stderr, "Can't write magic to dump file\n");
494 return -1;
495 }
496
497 return 0;
498}
499
500static int save_rule(struct nlmsghdr *n, void *arg)
501{
502 int ret;
503
504 ret = write(STDOUT_FILENO, n, n->nlmsg_len);
505 if ((ret > 0) && (ret != n->nlmsg_len)) {
506 fprintf(stderr, "Short write while saving nlmsg\n");
507 ret = -EIO;
508 }
509
510 return ret == n->nlmsg_len ? 0 : ret;
511}
512
513static int flush_rule(struct nlmsghdr *n, void *arg)
514{
515 struct rtnl_handle rth2;
516 struct fib_rule_hdr *frh = NLMSG_DATA(n);
517 int len = n->nlmsg_len;
518 struct rtattr *tb[FRA_MAX+1];
519 int host_len = -1;
520
521 len -= NLMSG_LENGTH(sizeof(*frh));
522 if (len < 0)
523 return -1;
524
525 parse_rtattr(tb, FRA_MAX, RTM_RTA(frh), len);
526
527 host_len = af_bit_len(frh->family);
528 if (!filter_nlmsg(n, tb, host_len))
529 return 0;
530
531 if (tb[FRA_PROTOCOL]) {
532 __u8 protocol = rta_getattr_u8(tb[FRA_PROTOCOL]);
533
534 if ((filter.protocol ^ protocol) & filter.protocolmask)
535 return 0;
536 }
537
538 if (tb[FRA_PRIORITY]) {
539 n->nlmsg_type = RTM_DELRULE;
540 n->nlmsg_flags = NLM_F_REQUEST;
541
542 if (rtnl_open(&rth2, 0) < 0)
543 return -1;
544
545 if (rtnl_talk(&rth2, n, NULL) < 0)
546 return -2;
547
548 rtnl_close(&rth2);
549 }
550
551 return 0;
552}
553
554static int iprule_list_flush_or_save(int argc, char **argv, int action)
555{
556 rtnl_filter_t filter_fn;
557 int af = preferred_family;
558
559 if (af == AF_UNSPEC)
560 af = AF_INET;
561
562 if (action == IPRULE_SAVE && argc > 0) {
563 fprintf(stderr, "\"ip rule save\" does not take any arguments.\n");
564 return -1;
565 }
566
567 switch (action) {
568 case IPRULE_SAVE:
569 if (save_rule_prep())
570 return -1;
571 filter_fn = save_rule;
572 break;
573 case IPRULE_FLUSH:
574 filter_fn = flush_rule;
575 break;
576 default:
577 filter_fn = print_rule;
578 }
579
580 memset(&filter, 0, sizeof(filter));
581
582 while (argc > 0) {
583 if (matches(*argv, "preference") == 0 ||
584 matches(*argv, "order") == 0 ||
585 matches(*argv, "priority") == 0) {
586 __u32 pref;
587
588 NEXT_ARG();
589 if (get_u32(&pref, *argv, 0))
590 invarg("preference value is invalid\n", *argv);
591 filter.pref = pref;
592 filter.prefmask = 1;
593 } else if (strcmp(*argv, "not") == 0) {
594 filter.not = 1;
595 } else if (strcmp(*argv, "tos") == 0) {
596 __u32 tos;
597
598 NEXT_ARG();
599 if (rtnl_dsfield_a2n(&tos, *argv))
600 invarg("TOS value is invalid\n", *argv);
601 filter.tos = tos;
602 filter.tosmask = 1;
603 } else if (strcmp(*argv, "fwmark") == 0) {
604 char *slash;
605 __u32 fwmark, fwmask;
606
607 NEXT_ARG();
608 slash = strchr(*argv, '/');
609 if (slash != NULL)
610 *slash = '\0';
611 if (get_u32(&fwmark, *argv, 0))
612 invarg("fwmark value is invalid\n", *argv);
613 filter.fwmark = fwmark;
614 if (slash) {
615 if (get_u32(&fwmask, slash+1, 0))
616 invarg("fwmask value is invalid\n",
617 slash+1);
618 filter.fwmask = fwmask;
619 }
620 } else if (strcmp(*argv, "dev") == 0 ||
621 strcmp(*argv, "iif") == 0) {
622 NEXT_ARG();
623 if (get_ifname(filter.iif, *argv))
624 invarg("\"iif\"/\"dev\" not a valid ifname", *argv);
625 filter.iifmask = 1;
626 } else if (strcmp(*argv, "oif") == 0) {
627 NEXT_ARG();
628 if (get_ifname(filter.oif, *argv))
629 invarg("\"oif\" not a valid ifname", *argv);
630 filter.oifmask = 1;
631 } else if (strcmp(*argv, "l3mdev") == 0) {
632 filter.l3mdev = 1;
633 } else if (strcmp(*argv, "uidrange") == 0) {
634 NEXT_ARG();
635 filter.uidrange = 1;
636 if (sscanf(*argv, "%u-%u",
637 &filter.range.start,
638 &filter.range.end) != 2)
639 invarg("invalid UID range\n", *argv);
640
641 } else if (matches(*argv, "tun_id") == 0) {
642 __u64 tun_id;
643
644 NEXT_ARG();
645 if (get_u64(&tun_id, *argv, 0))
646 invarg("\"tun_id\" value is invalid\n", *argv);
647 filter.tun_id = tun_id;
648 } else if (matches(*argv, "lookup") == 0 ||
649 matches(*argv, "table") == 0) {
650 __u32 tid;
651
652 NEXT_ARG();
653 if (rtnl_rttable_a2n(&tid, *argv))
654 invarg("table id value is invalid\n", *argv);
655 filter.tb = tid;
656 } else if (matches(*argv, "from") == 0 ||
657 matches(*argv, "src") == 0) {
658 NEXT_ARG();
659 if (get_prefix(&filter.src, *argv, af))
660 invarg("from value is invalid\n", *argv);
661 } else if (matches(*argv, "protocol") == 0) {
662 __u32 prot;
663 NEXT_ARG();
664 filter.protocolmask = -1;
665 if (rtnl_rtprot_a2n(&prot, *argv)) {
666 if (strcmp(*argv, "all") != 0)
667 invarg("invalid \"protocol\"\n", *argv);
668 prot = 0;
669 filter.protocolmask = 0;
670 }
671 filter.protocol = prot;
672 } else if (strcmp(*argv, "ipproto") == 0) {
673 int ipproto;
674
675 NEXT_ARG();
676 ipproto = inet_proto_a2n(*argv);
677 if (ipproto < 0)
678 invarg("Invalid \"ipproto\" value\n", *argv);
679 filter.ipproto = ipproto;
680 } else if (strcmp(*argv, "sport") == 0) {
681 struct fib_rule_port_range r;
682 int ret;
683
684 NEXT_ARG();
685 ret = sscanf(*argv, "%hu-%hu", &r.start, &r.end);
686 if (ret == 1)
687 r.end = r.start;
688 else if (ret != 2)
689 invarg("invalid port range\n", *argv);
690 filter.sport = r;
691 } else if (strcmp(*argv, "dport") == 0) {
692 struct fib_rule_port_range r;
693 int ret;
694
695 NEXT_ARG();
696 ret = sscanf(*argv, "%hu-%hu", &r.start, &r.end);
697 if (ret == 1)
698 r.end = r.start;
699 else if (ret != 2)
700 invarg("invalid dport range\n", *argv);
701 filter.dport = r;
702 } else{
703 if (matches(*argv, "dst") == 0 ||
704 matches(*argv, "to") == 0) {
705 NEXT_ARG();
706 }
707 if (get_prefix(&filter.dst, *argv, af))
708 invarg("to value is invalid\n", *argv);
709 }
710 argc--; argv++;
711 }
712
713 if (rtnl_ruledump_req(&rth, af) < 0) {
714 perror("Cannot send dump request");
715 return 1;
716 }
717
718 new_json_obj(json);
719 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
720 fprintf(stderr, "Dump terminated\n");
721 return 1;
722 }
723 delete_json_obj();
724
725 return 0;
726}
727
728static int rule_dump_check_magic(void)
729{
730 int ret;
731 __u32 magic = 0;
732
733 if (isatty(STDIN_FILENO)) {
734 fprintf(stderr, "Can't restore rule dump from a terminal\n");
735 return -1;
736 }
737
738 ret = fread(&magic, sizeof(magic), 1, stdin);
739 if (magic != rule_dump_magic) {
740 fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n",
741 ret, magic);
742 return -1;
743 }
744
745 return 0;
746}
747
748static int restore_handler(struct rtnl_ctrl_data *ctrl,
749 struct nlmsghdr *n, void *arg)
750{
751 int ret;
752
753 n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
754
755 ll_init_map(&rth);
756
757 ret = rtnl_talk(&rth, n, NULL);
758 if ((ret < 0) && (errno == EEXIST))
759 ret = 0;
760
761 return ret;
762}
763
764
765static int iprule_restore(void)
766{
767 if (rule_dump_check_magic())
768 exit(-1);
769
770 exit(rtnl_from_file(stdin, &restore_handler, NULL));
771}
772
773static int iprule_modify(int cmd, int argc, char **argv)
774{
775 int l3mdev_rule = 0;
776 int table_ok = 0;
777 __u32 tid = 0;
778 struct {
779 struct nlmsghdr n;
780 struct fib_rule_hdr frh;
781 char buf[1024];
782 } req = {
783 .n.nlmsg_type = cmd,
784 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
785 .n.nlmsg_flags = NLM_F_REQUEST,
786 .frh.family = preferred_family,
787 .frh.action = FR_ACT_UNSPEC,
788 };
789
790 if (cmd == RTM_NEWRULE) {
791 if (argc == 0) {
792 fprintf(stderr,
793 "\"ip rule add\" requires arguments.\n");
794 return -1;
795 }
796 req.n.nlmsg_flags |= NLM_F_CREATE|NLM_F_EXCL;
797 req.frh.action = FR_ACT_TO_TBL;
798 }
799
800 if (cmd == RTM_DELRULE && argc == 0) {
801 fprintf(stderr, "\"ip rule del\" requires arguments.\n");
802 return -1;
803 }
804
805 while (argc > 0) {
806 if (strcmp(*argv, "not") == 0) {
807 req.frh.flags |= FIB_RULE_INVERT;
808 } else if (strcmp(*argv, "from") == 0) {
809 inet_prefix dst;
810
811 NEXT_ARG();
812 get_prefix(&dst, *argv, req.frh.family);
813 req.frh.src_len = dst.bitlen;
814 addattr_l(&req.n, sizeof(req), FRA_SRC,
815 &dst.data, dst.bytelen);
816 } else if (strcmp(*argv, "to") == 0) {
817 inet_prefix dst;
818
819 NEXT_ARG();
820 get_prefix(&dst, *argv, req.frh.family);
821 req.frh.dst_len = dst.bitlen;
822 addattr_l(&req.n, sizeof(req), FRA_DST,
823 &dst.data, dst.bytelen);
824 } else if (matches(*argv, "preference") == 0 ||
825 matches(*argv, "order") == 0 ||
826 matches(*argv, "priority") == 0) {
827 __u32 pref;
828
829 NEXT_ARG();
830 if (get_u32(&pref, *argv, 0))
831 invarg("preference value is invalid\n", *argv);
832 addattr32(&req.n, sizeof(req), FRA_PRIORITY, pref);
833 } else if (strcmp(*argv, "tos") == 0 ||
834 matches(*argv, "dsfield") == 0) {
835 __u32 tos;
836
837 NEXT_ARG();
838 if (rtnl_dsfield_a2n(&tos, *argv))
839 invarg("TOS value is invalid\n", *argv);
840 req.frh.tos = tos;
841 } else if (strcmp(*argv, "fwmark") == 0) {
842 char *slash;
843 __u32 fwmark, fwmask;
844
845 NEXT_ARG();
846
847 slash = strchr(*argv, '/');
848 if (slash != NULL)
849 *slash = '\0';
850 if (get_u32(&fwmark, *argv, 0))
851 invarg("fwmark value is invalid\n", *argv);
852 addattr32(&req.n, sizeof(req), FRA_FWMARK, fwmark);
853 if (slash) {
854 if (get_u32(&fwmask, slash+1, 0))
855 invarg("fwmask value is invalid\n",
856 slash+1);
857 addattr32(&req.n, sizeof(req),
858 FRA_FWMASK, fwmask);
859 }
860 } else if (matches(*argv, "realms") == 0) {
861 __u32 realm;
862
863 NEXT_ARG();
864 if (get_rt_realms_or_raw(&realm, *argv))
865 invarg("invalid realms\n", *argv);
866 addattr32(&req.n, sizeof(req), FRA_FLOW, realm);
867 } else if (matches(*argv, "protocol") == 0) {
868 __u32 proto;
869
870 NEXT_ARG();
871 if (rtnl_rtprot_a2n(&proto, *argv))
872 invarg("\"protocol\" value is invalid\n", *argv);
873 addattr8(&req.n, sizeof(req), FRA_PROTOCOL, proto);
874 } else if (matches(*argv, "tun_id") == 0) {
875 __u64 tun_id;
876
877 NEXT_ARG();
878 if (get_be64(&tun_id, *argv, 0))
879 invarg("\"tun_id\" value is invalid\n", *argv);
880 addattr64(&req.n, sizeof(req), FRA_TUN_ID, tun_id);
881 } else if (matches(*argv, "table") == 0 ||
882 strcmp(*argv, "lookup") == 0) {
883 NEXT_ARG();
884 if (rtnl_rttable_a2n(&tid, *argv))
885 invarg("invalid table ID\n", *argv);
886 if (tid < 256)
887 req.frh.table = tid;
888 else {
889 req.frh.table = RT_TABLE_UNSPEC;
890 addattr32(&req.n, sizeof(req), FRA_TABLE, tid);
891 }
892 table_ok = 1;
893 } else if (matches(*argv, "suppress_prefixlength") == 0 ||
894 strcmp(*argv, "sup_pl") == 0) {
895 int pl;
896
897 NEXT_ARG();
898 if (get_s32(&pl, *argv, 0) || pl < 0)
899 invarg("suppress_prefixlength value is invalid\n",
900 *argv);
901 addattr32(&req.n, sizeof(req),
902 FRA_SUPPRESS_PREFIXLEN, pl);
903 } else if (matches(*argv, "suppress_ifgroup") == 0 ||
904 strcmp(*argv, "sup_group") == 0) {
905 NEXT_ARG();
906 int group;
907
908 if (rtnl_group_a2n(&group, *argv))
909 invarg("Invalid \"suppress_ifgroup\" value\n",
910 *argv);
911 addattr32(&req.n, sizeof(req),
912 FRA_SUPPRESS_IFGROUP, group);
913 } else if (strcmp(*argv, "dev") == 0 ||
914 strcmp(*argv, "iif") == 0) {
915 NEXT_ARG();
916 if (check_ifname(*argv))
917 invarg("\"iif\"/\"dev\" not a valid ifname", *argv);
918 addattr_l(&req.n, sizeof(req), FRA_IFNAME,
919 *argv, strlen(*argv)+1);
920 } else if (strcmp(*argv, "oif") == 0) {
921 NEXT_ARG();
922 if (check_ifname(*argv))
923 invarg("\"oif\" not a valid ifname", *argv);
924 addattr_l(&req.n, sizeof(req), FRA_OIFNAME,
925 *argv, strlen(*argv)+1);
926 } else if (strcmp(*argv, "l3mdev") == 0) {
927 addattr8(&req.n, sizeof(req), FRA_L3MDEV, 1);
928 table_ok = 1;
929 l3mdev_rule = 1;
930 } else if (strcmp(*argv, "uidrange") == 0) {
931 struct fib_rule_uid_range r;
932
933 NEXT_ARG();
934 if (sscanf(*argv, "%u-%u", &r.start, &r.end) != 2)
935 invarg("invalid UID range\n", *argv);
936 addattr_l(&req.n, sizeof(req), FRA_UID_RANGE, &r,
937 sizeof(r));
938 } else if (strcmp(*argv, "nat") == 0 ||
939 matches(*argv, "map-to") == 0) {
940 NEXT_ARG();
941 fprintf(stderr, "Warning: route NAT is deprecated\n");
942 addattr32(&req.n, sizeof(req), RTA_GATEWAY,
943 get_addr32(*argv));
944 req.frh.action = RTN_NAT;
945 } else if (strcmp(*argv, "ipproto") == 0) {
946 int ipproto;
947
948 NEXT_ARG();
949 ipproto = inet_proto_a2n(*argv);
950 if (ipproto < 0)
951 invarg("Invalid \"ipproto\" value\n",
952 *argv);
953 addattr8(&req.n, sizeof(req), FRA_IP_PROTO, ipproto);
954 } else if (strcmp(*argv, "sport") == 0) {
955 struct fib_rule_port_range r;
956 int ret = 0;
957
958 NEXT_ARG();
959 ret = sscanf(*argv, "%hu-%hu", &r.start, &r.end);
960 if (ret == 1)
961 r.end = r.start;
962 else if (ret != 2)
963 invarg("invalid port range\n", *argv);
964 addattr_l(&req.n, sizeof(req), FRA_SPORT_RANGE, &r,
965 sizeof(r));
966 } else if (strcmp(*argv, "dport") == 0) {
967 struct fib_rule_port_range r;
968 int ret = 0;
969
970 NEXT_ARG();
971 ret = sscanf(*argv, "%hu-%hu", &r.start, &r.end);
972 if (ret == 1)
973 r.end = r.start;
974 else if (ret != 2)
975 invarg("invalid dport range\n", *argv);
976 addattr_l(&req.n, sizeof(req), FRA_DPORT_RANGE, &r,
977 sizeof(r));
978 } else {
979 int type;
980
981 if (strcmp(*argv, "type") == 0)
982 NEXT_ARG();
983
984 if (matches(*argv, "help") == 0)
985 usage();
986 else if (matches(*argv, "goto") == 0) {
987 __u32 target;
988
989 type = FR_ACT_GOTO;
990 NEXT_ARG();
991 if (get_u32(&target, *argv, 0))
992 invarg("invalid target\n", *argv);
993 addattr32(&req.n, sizeof(req),
994 FRA_GOTO, target);
995 } else if (matches(*argv, "nop") == 0)
996 type = FR_ACT_NOP;
997 else if (rtnl_rtntype_a2n(&type, *argv))
998 invarg("Failed to parse rule type", *argv);
999 req.frh.action = type;
1000 table_ok = 1;
1001 }
1002 argc--;
1003 argv++;
1004 }
1005
1006 if (l3mdev_rule && tid != 0) {
1007 fprintf(stderr,
1008 "table can not be specified for l3mdev rules\n");
1009 return -EINVAL;
1010 }
1011
1012 if (req.frh.family == AF_UNSPEC)
1013 req.frh.family = AF_INET;
1014
1015 if (!table_ok && cmd == RTM_NEWRULE)
1016 req.frh.table = RT_TABLE_MAIN;
1017
1018 if (rtnl_talk(&rth, &req.n, NULL) < 0)
1019 return -2;
1020
1021 return 0;
1022}
1023
1024int do_iprule(int argc, char **argv)
1025{
1026 if (argc < 1) {
1027 return iprule_list_flush_or_save(0, NULL, IPRULE_LIST);
1028 } else if (matches(argv[0], "list") == 0 ||
1029 matches(argv[0], "lst") == 0 ||
1030 matches(argv[0], "show") == 0) {
1031 return iprule_list_flush_or_save(argc-1, argv+1, IPRULE_LIST);
1032 } else if (matches(argv[0], "save") == 0) {
1033 return iprule_list_flush_or_save(argc-1, argv+1, IPRULE_SAVE);
1034 } else if (matches(argv[0], "restore") == 0) {
1035 return iprule_restore();
1036 } else if (matches(argv[0], "add") == 0) {
1037 return iprule_modify(RTM_NEWRULE, argc-1, argv+1);
1038 } else if (matches(argv[0], "delete") == 0) {
1039 return iprule_modify(RTM_DELRULE, argc-1, argv+1);
1040 } else if (matches(argv[0], "flush") == 0) {
1041 return iprule_list_flush_or_save(argc-1, argv+1, IPRULE_FLUSH);
1042 } else if (matches(argv[0], "help") == 0)
1043 usage();
1044
1045 fprintf(stderr,
1046 "Command \"%s\" is unknown, try \"ip rule help\".\n", *argv);
1047 exit(-1);
1048}
1049
1050int do_multirule(int argc, char **argv)
1051{
1052 switch (preferred_family) {
1053 case AF_UNSPEC:
1054 case AF_INET:
1055 preferred_family = RTNL_FAMILY_IPMR;
1056 break;
1057 case AF_INET6:
1058 preferred_family = RTNL_FAMILY_IP6MR;
1059 break;
1060 case RTNL_FAMILY_IPMR:
1061 case RTNL_FAMILY_IP6MR:
1062 break;
1063 default:
1064 fprintf(stderr,
1065 "Multicast rules are only supported for IPv4/IPv6, was: %i\n",
1066 preferred_family);
1067 exit(-1);
1068 }
1069
1070 return do_iprule(argc, argv);
1071}
1072
