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aba5acdf SH |
1 | /* |
2 | * tc_filter.c "tc filter". | |
3 | * | |
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. | |
8 | * | |
9 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <unistd.h> | |
16 | #include <syslog.h> | |
17 | #include <fcntl.h> | |
aba5acdf SH |
18 | #include <sys/socket.h> |
19 | #include <netinet/in.h> | |
20 | #include <arpa/inet.h> | |
21 | #include <string.h> | |
22 | #include <linux/if_ether.h> | |
23 | ||
24 | #include "rt_names.h" | |
25 | #include "utils.h" | |
26 | #include "tc_util.h" | |
27 | #include "tc_common.h" | |
28 | ||
024481bb | 29 | static void usage(void); |
aba5acdf SH |
30 | |
31 | static void usage(void) | |
32 | { | |
e5d179d8 | 33 | fprintf(stderr, "Usage: tc filter [ add | del | change | replace | show ] dev STRING\n"); |
de33a430 | 34 | fprintf(stderr, " [ pref PRIO ] protocol PROTO\n"); |
aba5acdf SH |
35 | fprintf(stderr, " [ estimator INTERVAL TIME_CONSTANT ]\n"); |
36 | fprintf(stderr, " [ root | classid CLASSID ] [ handle FILTERID ]\n"); | |
37 | fprintf(stderr, " [ [ FILTER_TYPE ] [ help | OPTIONS ] ]\n"); | |
38 | fprintf(stderr, "\n"); | |
39 | fprintf(stderr, " tc filter show [ dev STRING ] [ root | parent CLASSID ]\n"); | |
40 | fprintf(stderr, "Where:\n"); | |
41 | fprintf(stderr, "FILTER_TYPE := { rsvp | u32 | fw | route | etc. }\n"); | |
42 | fprintf(stderr, "FILTERID := ... format depends on classifier, see there\n"); | |
43 | fprintf(stderr, "OPTIONS := ... try tc filter add <desired FILTER_KIND> help\n"); | |
024481bb | 44 | return; |
aba5acdf SH |
45 | } |
46 | ||
47 | ||
d1f28cf1 | 48 | static int tc_filter_modify(int cmd, unsigned flags, int argc, char **argv) |
aba5acdf | 49 | { |
aba5acdf SH |
50 | struct { |
51 | struct nlmsghdr n; | |
52 | struct tcmsg t; | |
2373fde9 | 53 | char buf[MAX_MSG]; |
aba5acdf SH |
54 | } req; |
55 | struct filter_util *q = NULL; | |
56 | __u32 prio = 0; | |
ae761068 | 57 | __u32 protocol = 0; |
083a5f00 | 58 | int protocol_set = 0; |
aba5acdf SH |
59 | char *fhandle = NULL; |
60 | char d[16]; | |
61 | char k[16]; | |
62 | struct tc_estimator est; | |
63 | ||
64 | memset(&req, 0, sizeof(req)); | |
65 | memset(&est, 0, sizeof(est)); | |
66 | memset(d, 0, sizeof(d)); | |
67 | memset(k, 0, sizeof(k)); | |
68 | memset(&req, 0, sizeof(req)); | |
69 | ||
70 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)); | |
71 | req.n.nlmsg_flags = NLM_F_REQUEST|flags; | |
72 | req.n.nlmsg_type = cmd; | |
73 | req.t.tcm_family = AF_UNSPEC; | |
74 | ||
ae761068 | 75 | if (cmd == RTM_NEWTFILTER && flags & NLM_F_CREATE) |
05fb9184 | 76 | protocol = htons(ETH_P_ALL); |
ae761068 | 77 | |
aba5acdf SH |
78 | while (argc > 0) { |
79 | if (strcmp(*argv, "dev") == 0) { | |
80 | NEXT_ARG(); | |
81 | if (d[0]) | |
82 | duparg("dev", *argv); | |
83 | strncpy(d, *argv, sizeof(d)-1); | |
84 | } else if (strcmp(*argv, "root") == 0) { | |
85 | if (req.t.tcm_parent) { | |
86 | fprintf(stderr, "Error: \"root\" is duplicate parent ID\n"); | |
024481bb | 87 | return -1; |
aba5acdf SH |
88 | } |
89 | req.t.tcm_parent = TC_H_ROOT; | |
90 | } else if (strcmp(*argv, "parent") == 0) { | |
91 | __u32 handle; | |
92 | NEXT_ARG(); | |
93 | if (req.t.tcm_parent) | |
94 | duparg("parent", *argv); | |
95 | if (get_tc_classid(&handle, *argv)) | |
f1675d61 | 96 | invarg("Invalid parent ID", *argv); |
aba5acdf SH |
97 | req.t.tcm_parent = handle; |
98 | } else if (strcmp(*argv, "handle") == 0) { | |
99 | NEXT_ARG(); | |
100 | if (fhandle) | |
101 | duparg("handle", *argv); | |
102 | fhandle = *argv; | |
103 | } else if (matches(*argv, "preference") == 0 || | |
104 | matches(*argv, "priority") == 0) { | |
105 | NEXT_ARG(); | |
106 | if (prio) | |
107 | duparg("priority", *argv); | |
424adc19 | 108 | if (get_u32(&prio, *argv, 0) || prio > 0xFFFF) |
f1675d61 | 109 | invarg("invalid priority value", *argv); |
aba5acdf SH |
110 | } else if (matches(*argv, "protocol") == 0) { |
111 | __u16 id; | |
112 | NEXT_ARG(); | |
083a5f00 | 113 | if (protocol_set) |
aba5acdf SH |
114 | duparg("protocol", *argv); |
115 | if (ll_proto_a2n(&id, *argv)) | |
f1675d61 | 116 | invarg("invalid protocol", *argv); |
aba5acdf | 117 | protocol = id; |
083a5f00 | 118 | protocol_set = 1; |
aba5acdf SH |
119 | } else if (matches(*argv, "estimator") == 0) { |
120 | if (parse_estimator(&argc, &argv, &est) < 0) | |
121 | return -1; | |
122 | } else if (matches(*argv, "help") == 0) { | |
123 | usage(); | |
3a99df70 | 124 | return 0; |
aba5acdf SH |
125 | } else { |
126 | strncpy(k, *argv, sizeof(k)-1); | |
127 | ||
128 | q = get_filter_kind(k); | |
129 | argc--; argv++; | |
130 | break; | |
131 | } | |
132 | ||
133 | argc--; argv++; | |
134 | } | |
135 | ||
136 | req.t.tcm_info = TC_H_MAKE(prio<<16, protocol); | |
137 | ||
138 | if (k[0]) | |
139 | addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1); | |
140 | ||
141 | if (q) { | |
142 | if (q->parse_fopt(q, fhandle, argc, argv, &req.n)) | |
024481bb | 143 | return 1; |
aba5acdf SH |
144 | } else { |
145 | if (fhandle) { | |
146 | fprintf(stderr, "Must specify filter type when using " | |
147 | "\"handle\"\n"); | |
024481bb | 148 | return -1; |
aba5acdf SH |
149 | } |
150 | if (argc) { | |
151 | if (matches(*argv, "help") == 0) | |
152 | usage(); | |
153 | fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc filter help\".\n", *argv); | |
024481bb | 154 | return -1; |
aba5acdf SH |
155 | } |
156 | } | |
157 | if (est.ewma_log) | |
158 | addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est)); | |
159 | ||
aba5acdf SH |
160 | |
161 | if (d[0]) { | |
3d0b7439 | 162 | ll_init_map(&rth); |
aba5acdf SH |
163 | |
164 | if ((req.t.tcm_ifindex = ll_name_to_index(d)) == 0) { | |
165 | fprintf(stderr, "Cannot find device \"%s\"\n", d); | |
024481bb | 166 | return 1; |
aba5acdf SH |
167 | } |
168 | } | |
169 | ||
cd70f3f5 | 170 | if (rtnl_talk(&rth, &req.n, 0, 0, NULL) < 0) { |
2373fde9 | 171 | fprintf(stderr, "We have an error talking to the kernel\n"); |
024481bb | 172 | return 2; |
2373fde9 | 173 | } |
aba5acdf | 174 | |
aba5acdf SH |
175 | return 0; |
176 | } | |
177 | ||
178 | static __u32 filter_parent; | |
179 | static int filter_ifindex; | |
180 | static __u32 filter_prio; | |
181 | static __u32 filter_protocol; | |
eefcbc72 | 182 | __u16 f_proto = 0; |
aba5acdf | 183 | |
5bec3484 | 184 | int print_filter(const struct sockaddr_nl *who, |
ae665a52 | 185 | struct nlmsghdr *n, |
de481780 | 186 | void *arg) |
aba5acdf SH |
187 | { |
188 | FILE *fp = (FILE*)arg; | |
189 | struct tcmsg *t = NLMSG_DATA(n); | |
190 | int len = n->nlmsg_len; | |
191 | struct rtattr * tb[TCA_MAX+1]; | |
192 | struct filter_util *q; | |
193 | char abuf[256]; | |
194 | ||
195 | if (n->nlmsg_type != RTM_NEWTFILTER && n->nlmsg_type != RTM_DELTFILTER) { | |
196 | fprintf(stderr, "Not a filter\n"); | |
197 | return 0; | |
198 | } | |
199 | len -= NLMSG_LENGTH(sizeof(*t)); | |
200 | if (len < 0) { | |
201 | fprintf(stderr, "Wrong len %d\n", len); | |
202 | return -1; | |
203 | } | |
204 | ||
205 | memset(tb, 0, sizeof(tb)); | |
206 | parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len); | |
207 | ||
208 | if (tb[TCA_KIND] == NULL) { | |
2373fde9 | 209 | fprintf(stderr, "print_filter: NULL kind\n"); |
aba5acdf SH |
210 | return -1; |
211 | } | |
212 | ||
213 | if (n->nlmsg_type == RTM_DELTFILTER) | |
214 | fprintf(fp, "deleted "); | |
215 | ||
216 | fprintf(fp, "filter "); | |
217 | if (!filter_ifindex || filter_ifindex != t->tcm_ifindex) | |
218 | fprintf(fp, "dev %s ", ll_index_to_name(t->tcm_ifindex)); | |
219 | ||
220 | if (!filter_parent || filter_parent != t->tcm_parent) { | |
221 | if (t->tcm_parent == TC_H_ROOT) | |
222 | fprintf(fp, "root "); | |
223 | else { | |
224 | print_tc_classid(abuf, sizeof(abuf), t->tcm_parent); | |
225 | fprintf(fp, "parent %s ", abuf); | |
226 | } | |
227 | } | |
228 | if (t->tcm_info) { | |
eefcbc72 | 229 | f_proto = TC_H_MIN(t->tcm_info); |
aba5acdf | 230 | __u32 prio = TC_H_MAJ(t->tcm_info)>>16; |
eefcbc72 | 231 | if (!filter_protocol || filter_protocol != f_proto) { |
232 | if (f_proto) { | |
aba5acdf SH |
233 | SPRINT_BUF(b1); |
234 | fprintf(fp, "protocol %s ", | |
eefcbc72 | 235 | ll_proto_n2a(f_proto, b1, sizeof(b1))); |
aba5acdf SH |
236 | } |
237 | } | |
238 | if (!filter_prio || filter_prio != prio) { | |
239 | if (prio) | |
240 | fprintf(fp, "pref %u ", prio); | |
241 | } | |
242 | } | |
ff24746c | 243 | fprintf(fp, "%s ", rta_getattr_str(tb[TCA_KIND])); |
aba5acdf SH |
244 | q = get_filter_kind(RTA_DATA(tb[TCA_KIND])); |
245 | if (tb[TCA_OPTIONS]) { | |
246 | if (q) | |
247 | q->print_fopt(q, fp, tb[TCA_OPTIONS], t->tcm_handle); | |
248 | else | |
249 | fprintf(fp, "[cannot parse parameters]"); | |
250 | } | |
251 | fprintf(fp, "\n"); | |
252 | ||
e5879dc6 | 253 | if (show_stats && (tb[TCA_STATS] || tb[TCA_STATS2])) { |
254 | print_tcstats_attr(fp, tb, " ", NULL); | |
de481780 | 255 | fprintf(fp, "\n"); |
aba5acdf | 256 | } |
de481780 | 257 | |
aba5acdf SH |
258 | fflush(fp); |
259 | return 0; | |
260 | } | |
261 | ||
262 | ||
d1f28cf1 | 263 | static int tc_filter_list(int argc, char **argv) |
aba5acdf SH |
264 | { |
265 | struct tcmsg t; | |
aba5acdf SH |
266 | char d[16]; |
267 | __u32 prio = 0; | |
268 | __u32 protocol = 0; | |
269 | char *fhandle = NULL; | |
270 | ||
271 | memset(&t, 0, sizeof(t)); | |
272 | t.tcm_family = AF_UNSPEC; | |
273 | memset(d, 0, sizeof(d)); | |
274 | ||
275 | while (argc > 0) { | |
276 | if (strcmp(*argv, "dev") == 0) { | |
277 | NEXT_ARG(); | |
278 | if (d[0]) | |
279 | duparg("dev", *argv); | |
280 | strncpy(d, *argv, sizeof(d)-1); | |
281 | } else if (strcmp(*argv, "root") == 0) { | |
282 | if (t.tcm_parent) { | |
283 | fprintf(stderr, "Error: \"root\" is duplicate parent ID\n"); | |
024481bb | 284 | return -1; |
aba5acdf SH |
285 | } |
286 | filter_parent = t.tcm_parent = TC_H_ROOT; | |
287 | } else if (strcmp(*argv, "parent") == 0) { | |
288 | __u32 handle; | |
289 | NEXT_ARG(); | |
290 | if (t.tcm_parent) | |
291 | duparg("parent", *argv); | |
292 | if (get_tc_classid(&handle, *argv)) | |
f1675d61 | 293 | invarg("invalid parent ID", *argv); |
aba5acdf SH |
294 | filter_parent = t.tcm_parent = handle; |
295 | } else if (strcmp(*argv, "handle") == 0) { | |
296 | NEXT_ARG(); | |
297 | if (fhandle) | |
298 | duparg("handle", *argv); | |
299 | fhandle = *argv; | |
300 | } else if (matches(*argv, "preference") == 0 || | |
301 | matches(*argv, "priority") == 0) { | |
302 | NEXT_ARG(); | |
303 | if (prio) | |
304 | duparg("priority", *argv); | |
305 | if (get_u32(&prio, *argv, 0)) | |
f1675d61 | 306 | invarg("invalid preference", *argv); |
aba5acdf SH |
307 | filter_prio = prio; |
308 | } else if (matches(*argv, "protocol") == 0) { | |
309 | __u16 res; | |
310 | NEXT_ARG(); | |
311 | if (protocol) | |
312 | duparg("protocol", *argv); | |
313 | if (ll_proto_a2n(&res, *argv)) | |
f1675d61 | 314 | invarg("invalid protocol", *argv); |
aba5acdf SH |
315 | protocol = res; |
316 | filter_protocol = protocol; | |
317 | } else if (matches(*argv, "help") == 0) { | |
318 | usage(); | |
319 | } else { | |
320 | fprintf(stderr, " What is \"%s\"? Try \"tc filter help\"\n", *argv); | |
024481bb | 321 | return -1; |
aba5acdf SH |
322 | } |
323 | ||
324 | argc--; argv++; | |
325 | } | |
326 | ||
327 | t.tcm_info = TC_H_MAKE(prio<<16, protocol); | |
328 | ||
3d0b7439 | 329 | ll_init_map(&rth); |
aba5acdf SH |
330 | |
331 | if (d[0]) { | |
332 | if ((t.tcm_ifindex = ll_name_to_index(d)) == 0) { | |
333 | fprintf(stderr, "Cannot find device \"%s\"\n", d); | |
024481bb | 334 | return 1; |
aba5acdf SH |
335 | } |
336 | filter_ifindex = t.tcm_ifindex; | |
337 | } | |
338 | ||
3d0b7439 | 339 | if (rtnl_dump_request(&rth, RTM_GETTFILTER, &t, sizeof(t)) < 0) { |
aba5acdf | 340 | perror("Cannot send dump request"); |
024481bb | 341 | return 1; |
aba5acdf SH |
342 | } |
343 | ||
3d0b7439 | 344 | if (rtnl_dump_filter(&rth, print_filter, stdout) < 0) { |
aba5acdf | 345 | fprintf(stderr, "Dump terminated\n"); |
024481bb | 346 | return 1; |
aba5acdf SH |
347 | } |
348 | ||
aba5acdf SH |
349 | return 0; |
350 | } | |
351 | ||
352 | int do_filter(int argc, char **argv) | |
353 | { | |
354 | if (argc < 1) | |
355 | return tc_filter_list(0, NULL); | |
356 | if (matches(*argv, "add") == 0) | |
357 | return tc_filter_modify(RTM_NEWTFILTER, NLM_F_EXCL|NLM_F_CREATE, argc-1, argv+1); | |
358 | if (matches(*argv, "change") == 0) | |
359 | return tc_filter_modify(RTM_NEWTFILTER, 0, argc-1, argv+1); | |
360 | if (matches(*argv, "replace") == 0) | |
361 | return tc_filter_modify(RTM_NEWTFILTER, NLM_F_CREATE, argc-1, argv+1); | |
362 | if (matches(*argv, "delete") == 0) | |
363 | return tc_filter_modify(RTM_DELTFILTER, 0, argc-1, argv+1); | |
364 | #if 0 | |
365 | if (matches(*argv, "get") == 0) | |
366 | return tc_filter_get(RTM_GETTFILTER, 0, argc-1, argv+1); | |
367 | #endif | |
368 | if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0 | |
369 | || matches(*argv, "lst") == 0) | |
370 | return tc_filter_list(argc-1, argv+1); | |
e5d179d8 | 371 | if (matches(*argv, "help") == 0) { |
aba5acdf | 372 | usage(); |
e5d179d8 HT |
373 | return 0; |
374 | } | |
aba5acdf | 375 | fprintf(stderr, "Command \"%s\" is unknown, try \"tc filter help\".\n", *argv); |
024481bb | 376 | return -1; |
aba5acdf SH |
377 | } |
378 |