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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> | |
18 | #include <net/if.h> | |
19 | #include <net/if_arp.h> | |
20 | #include <sys/socket.h> | |
21 | #include <netinet/in.h> | |
22 | #include <arpa/inet.h> | |
23 | #include <string.h> | |
24 | #include <linux/if_ether.h> | |
25 | ||
26 | #include "rt_names.h" | |
27 | #include "utils.h" | |
28 | #include "tc_util.h" | |
29 | #include "tc_common.h" | |
30 | ||
024481bb | 31 | static void usage(void); |
aba5acdf SH |
32 | |
33 | static void usage(void) | |
34 | { | |
302d3fb7 | 35 | fprintf(stderr, "Usage: tc filter [ add | del | change | get ] dev STRING\n"); |
aba5acdf SH |
36 | fprintf(stderr, " [ pref PRIO ] [ protocol PROTO ]\n"); |
37 | fprintf(stderr, " [ estimator INTERVAL TIME_CONSTANT ]\n"); | |
38 | fprintf(stderr, " [ root | classid CLASSID ] [ handle FILTERID ]\n"); | |
39 | fprintf(stderr, " [ [ FILTER_TYPE ] [ help | OPTIONS ] ]\n"); | |
40 | fprintf(stderr, "\n"); | |
41 | fprintf(stderr, " tc filter show [ dev STRING ] [ root | parent CLASSID ]\n"); | |
42 | fprintf(stderr, "Where:\n"); | |
43 | fprintf(stderr, "FILTER_TYPE := { rsvp | u32 | fw | route | etc. }\n"); | |
44 | fprintf(stderr, "FILTERID := ... format depends on classifier, see there\n"); | |
45 | fprintf(stderr, "OPTIONS := ... try tc filter add <desired FILTER_KIND> help\n"); | |
024481bb | 46 | return; |
aba5acdf SH |
47 | } |
48 | ||
49 | ||
50 | int tc_filter_modify(int cmd, unsigned flags, int argc, char **argv) | |
51 | { | |
aba5acdf SH |
52 | struct { |
53 | struct nlmsghdr n; | |
54 | struct tcmsg t; | |
2373fde9 | 55 | char buf[MAX_MSG]; |
aba5acdf SH |
56 | } req; |
57 | struct filter_util *q = NULL; | |
58 | __u32 prio = 0; | |
59 | __u32 protocol = 0; | |
60 | char *fhandle = NULL; | |
61 | char d[16]; | |
62 | char k[16]; | |
63 | struct tc_estimator est; | |
64 | ||
65 | memset(&req, 0, sizeof(req)); | |
66 | memset(&est, 0, sizeof(est)); | |
67 | memset(d, 0, sizeof(d)); | |
68 | memset(k, 0, sizeof(k)); | |
69 | memset(&req, 0, sizeof(req)); | |
70 | ||
71 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)); | |
72 | req.n.nlmsg_flags = NLM_F_REQUEST|flags; | |
73 | req.n.nlmsg_type = cmd; | |
74 | req.t.tcm_family = AF_UNSPEC; | |
75 | ||
76 | while (argc > 0) { | |
77 | if (strcmp(*argv, "dev") == 0) { | |
78 | NEXT_ARG(); | |
79 | if (d[0]) | |
80 | duparg("dev", *argv); | |
81 | strncpy(d, *argv, sizeof(d)-1); | |
82 | } else if (strcmp(*argv, "root") == 0) { | |
83 | if (req.t.tcm_parent) { | |
84 | fprintf(stderr, "Error: \"root\" is duplicate parent ID\n"); | |
024481bb | 85 | return -1; |
aba5acdf SH |
86 | } |
87 | req.t.tcm_parent = TC_H_ROOT; | |
88 | } else if (strcmp(*argv, "parent") == 0) { | |
89 | __u32 handle; | |
90 | NEXT_ARG(); | |
91 | if (req.t.tcm_parent) | |
92 | duparg("parent", *argv); | |
93 | if (get_tc_classid(&handle, *argv)) | |
94 | invarg(*argv, "Invalid parent ID"); | |
95 | req.t.tcm_parent = handle; | |
96 | } else if (strcmp(*argv, "handle") == 0) { | |
97 | NEXT_ARG(); | |
98 | if (fhandle) | |
99 | duparg("handle", *argv); | |
100 | fhandle = *argv; | |
101 | } else if (matches(*argv, "preference") == 0 || | |
102 | matches(*argv, "priority") == 0) { | |
103 | NEXT_ARG(); | |
104 | if (prio) | |
105 | duparg("priority", *argv); | |
106 | if (get_u32(&prio, *argv, 0)) | |
107 | invarg(*argv, "invalid prpriority value"); | |
108 | } else if (matches(*argv, "protocol") == 0) { | |
109 | __u16 id; | |
110 | NEXT_ARG(); | |
111 | if (protocol) | |
112 | duparg("protocol", *argv); | |
113 | if (ll_proto_a2n(&id, *argv)) | |
114 | invarg(*argv, "invalid protocol"); | |
115 | protocol = id; | |
116 | } else if (matches(*argv, "estimator") == 0) { | |
117 | if (parse_estimator(&argc, &argv, &est) < 0) | |
118 | return -1; | |
119 | } else if (matches(*argv, "help") == 0) { | |
120 | usage(); | |
121 | } else { | |
122 | strncpy(k, *argv, sizeof(k)-1); | |
123 | ||
124 | q = get_filter_kind(k); | |
125 | argc--; argv++; | |
126 | break; | |
127 | } | |
128 | ||
129 | argc--; argv++; | |
130 | } | |
131 | ||
132 | req.t.tcm_info = TC_H_MAKE(prio<<16, protocol); | |
133 | ||
134 | if (k[0]) | |
135 | addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1); | |
136 | ||
137 | if (q) { | |
138 | if (q->parse_fopt(q, fhandle, argc, argv, &req.n)) | |
024481bb | 139 | return 1; |
aba5acdf SH |
140 | } else { |
141 | if (fhandle) { | |
142 | fprintf(stderr, "Must specify filter type when using " | |
143 | "\"handle\"\n"); | |
024481bb | 144 | return -1; |
aba5acdf SH |
145 | } |
146 | if (argc) { | |
147 | if (matches(*argv, "help") == 0) | |
148 | usage(); | |
149 | fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc filter help\".\n", *argv); | |
024481bb | 150 | return -1; |
aba5acdf SH |
151 | } |
152 | } | |
153 | if (est.ewma_log) | |
154 | addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est)); | |
155 | ||
aba5acdf SH |
156 | |
157 | if (d[0]) { | |
7901660a | 158 | ll_init_map(&rth); |
aba5acdf SH |
159 | |
160 | if ((req.t.tcm_ifindex = ll_name_to_index(d)) == 0) { | |
161 | fprintf(stderr, "Cannot find device \"%s\"\n", d); | |
024481bb | 162 | return 1; |
aba5acdf SH |
163 | } |
164 | } | |
165 | ||
7901660a | 166 | if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) { |
2373fde9 | 167 | fprintf(stderr, "We have an error talking to the kernel\n"); |
024481bb | 168 | return 2; |
2373fde9 | 169 | } |
aba5acdf | 170 | |
aba5acdf SH |
171 | return 0; |
172 | } | |
173 | ||
174 | static __u32 filter_parent; | |
175 | static int filter_ifindex; | |
176 | static __u32 filter_prio; | |
177 | static __u32 filter_protocol; | |
178 | ||
5bec3484 | 179 | int print_filter(const struct sockaddr_nl *who, |
ae665a52 | 180 | struct nlmsghdr *n, |
de481780 | 181 | void *arg) |
aba5acdf SH |
182 | { |
183 | FILE *fp = (FILE*)arg; | |
184 | struct tcmsg *t = NLMSG_DATA(n); | |
185 | int len = n->nlmsg_len; | |
186 | struct rtattr * tb[TCA_MAX+1]; | |
187 | struct filter_util *q; | |
188 | char abuf[256]; | |
189 | ||
190 | if (n->nlmsg_type != RTM_NEWTFILTER && n->nlmsg_type != RTM_DELTFILTER) { | |
191 | fprintf(stderr, "Not a filter\n"); | |
192 | return 0; | |
193 | } | |
194 | len -= NLMSG_LENGTH(sizeof(*t)); | |
195 | if (len < 0) { | |
196 | fprintf(stderr, "Wrong len %d\n", len); | |
197 | return -1; | |
198 | } | |
199 | ||
200 | memset(tb, 0, sizeof(tb)); | |
201 | parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len); | |
202 | ||
203 | if (tb[TCA_KIND] == NULL) { | |
2373fde9 | 204 | fprintf(stderr, "print_filter: NULL kind\n"); |
aba5acdf SH |
205 | return -1; |
206 | } | |
207 | ||
208 | if (n->nlmsg_type == RTM_DELTFILTER) | |
209 | fprintf(fp, "deleted "); | |
210 | ||
211 | fprintf(fp, "filter "); | |
212 | if (!filter_ifindex || filter_ifindex != t->tcm_ifindex) | |
213 | fprintf(fp, "dev %s ", ll_index_to_name(t->tcm_ifindex)); | |
214 | ||
215 | if (!filter_parent || filter_parent != t->tcm_parent) { | |
216 | if (t->tcm_parent == TC_H_ROOT) | |
217 | fprintf(fp, "root "); | |
218 | else { | |
219 | print_tc_classid(abuf, sizeof(abuf), t->tcm_parent); | |
220 | fprintf(fp, "parent %s ", abuf); | |
221 | } | |
222 | } | |
223 | if (t->tcm_info) { | |
224 | __u32 protocol = TC_H_MIN(t->tcm_info); | |
225 | __u32 prio = TC_H_MAJ(t->tcm_info)>>16; | |
226 | if (!filter_protocol || filter_protocol != protocol) { | |
227 | if (protocol) { | |
228 | SPRINT_BUF(b1); | |
229 | fprintf(fp, "protocol %s ", | |
230 | ll_proto_n2a(protocol, b1, sizeof(b1))); | |
231 | } | |
232 | } | |
233 | if (!filter_prio || filter_prio != prio) { | |
234 | if (prio) | |
235 | fprintf(fp, "pref %u ", prio); | |
236 | } | |
237 | } | |
238 | fprintf(fp, "%s ", (char*)RTA_DATA(tb[TCA_KIND])); | |
239 | q = get_filter_kind(RTA_DATA(tb[TCA_KIND])); | |
240 | if (tb[TCA_OPTIONS]) { | |
241 | if (q) | |
242 | q->print_fopt(q, fp, tb[TCA_OPTIONS], t->tcm_handle); | |
243 | else | |
244 | fprintf(fp, "[cannot parse parameters]"); | |
245 | } | |
246 | fprintf(fp, "\n"); | |
247 | ||
e5879dc6 | 248 | if (show_stats && (tb[TCA_STATS] || tb[TCA_STATS2])) { |
249 | print_tcstats_attr(fp, tb, " ", NULL); | |
de481780 | 250 | fprintf(fp, "\n"); |
aba5acdf | 251 | } |
de481780 | 252 | |
aba5acdf SH |
253 | fflush(fp); |
254 | return 0; | |
255 | } | |
256 | ||
257 | ||
258 | int tc_filter_list(int argc, char **argv) | |
259 | { | |
260 | struct tcmsg t; | |
aba5acdf SH |
261 | char d[16]; |
262 | __u32 prio = 0; | |
263 | __u32 protocol = 0; | |
264 | char *fhandle = NULL; | |
265 | ||
266 | memset(&t, 0, sizeof(t)); | |
267 | t.tcm_family = AF_UNSPEC; | |
268 | memset(d, 0, sizeof(d)); | |
269 | ||
270 | while (argc > 0) { | |
271 | if (strcmp(*argv, "dev") == 0) { | |
272 | NEXT_ARG(); | |
273 | if (d[0]) | |
274 | duparg("dev", *argv); | |
275 | strncpy(d, *argv, sizeof(d)-1); | |
276 | } else if (strcmp(*argv, "root") == 0) { | |
277 | if (t.tcm_parent) { | |
278 | fprintf(stderr, "Error: \"root\" is duplicate parent ID\n"); | |
024481bb | 279 | return -1; |
aba5acdf SH |
280 | } |
281 | filter_parent = t.tcm_parent = TC_H_ROOT; | |
282 | } else if (strcmp(*argv, "parent") == 0) { | |
283 | __u32 handle; | |
284 | NEXT_ARG(); | |
285 | if (t.tcm_parent) | |
286 | duparg("parent", *argv); | |
287 | if (get_tc_classid(&handle, *argv)) | |
288 | invarg(*argv, "invalid parent ID"); | |
289 | filter_parent = t.tcm_parent = handle; | |
290 | } else if (strcmp(*argv, "handle") == 0) { | |
291 | NEXT_ARG(); | |
292 | if (fhandle) | |
293 | duparg("handle", *argv); | |
294 | fhandle = *argv; | |
295 | } else if (matches(*argv, "preference") == 0 || | |
296 | matches(*argv, "priority") == 0) { | |
297 | NEXT_ARG(); | |
298 | if (prio) | |
299 | duparg("priority", *argv); | |
300 | if (get_u32(&prio, *argv, 0)) | |
301 | invarg(*argv, "invalid preference"); | |
302 | filter_prio = prio; | |
303 | } else if (matches(*argv, "protocol") == 0) { | |
304 | __u16 res; | |
305 | NEXT_ARG(); | |
306 | if (protocol) | |
307 | duparg("protocol", *argv); | |
308 | if (ll_proto_a2n(&res, *argv)) | |
309 | invarg(*argv, "invalid protocol"); | |
310 | protocol = res; | |
311 | filter_protocol = protocol; | |
312 | } else if (matches(*argv, "help") == 0) { | |
313 | usage(); | |
314 | } else { | |
315 | fprintf(stderr, " What is \"%s\"? Try \"tc filter help\"\n", *argv); | |
024481bb | 316 | return -1; |
aba5acdf SH |
317 | } |
318 | ||
319 | argc--; argv++; | |
320 | } | |
321 | ||
322 | t.tcm_info = TC_H_MAKE(prio<<16, protocol); | |
323 | ||
7901660a | 324 | ll_init_map(&rth); |
aba5acdf SH |
325 | |
326 | if (d[0]) { | |
327 | if ((t.tcm_ifindex = ll_name_to_index(d)) == 0) { | |
328 | fprintf(stderr, "Cannot find device \"%s\"\n", d); | |
024481bb | 329 | return 1; |
aba5acdf SH |
330 | } |
331 | filter_ifindex = t.tcm_ifindex; | |
332 | } | |
333 | ||
7901660a | 334 | if (rtnl_dump_request(&rth, RTM_GETTFILTER, &t, sizeof(t)) < 0) { |
aba5acdf | 335 | perror("Cannot send dump request"); |
024481bb | 336 | return 1; |
aba5acdf SH |
337 | } |
338 | ||
7901660a | 339 | if (rtnl_dump_filter(&rth, print_filter, stdout, NULL, NULL) < 0) { |
aba5acdf | 340 | fprintf(stderr, "Dump terminated\n"); |
024481bb | 341 | return 1; |
aba5acdf SH |
342 | } |
343 | ||
aba5acdf SH |
344 | return 0; |
345 | } | |
346 | ||
347 | int do_filter(int argc, char **argv) | |
348 | { | |
349 | if (argc < 1) | |
350 | return tc_filter_list(0, NULL); | |
351 | if (matches(*argv, "add") == 0) | |
352 | return tc_filter_modify(RTM_NEWTFILTER, NLM_F_EXCL|NLM_F_CREATE, argc-1, argv+1); | |
353 | if (matches(*argv, "change") == 0) | |
354 | return tc_filter_modify(RTM_NEWTFILTER, 0, argc-1, argv+1); | |
355 | if (matches(*argv, "replace") == 0) | |
356 | return tc_filter_modify(RTM_NEWTFILTER, NLM_F_CREATE, argc-1, argv+1); | |
357 | if (matches(*argv, "delete") == 0) | |
358 | return tc_filter_modify(RTM_DELTFILTER, 0, argc-1, argv+1); | |
359 | #if 0 | |
360 | if (matches(*argv, "get") == 0) | |
361 | return tc_filter_get(RTM_GETTFILTER, 0, argc-1, argv+1); | |
362 | #endif | |
363 | if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0 | |
364 | || matches(*argv, "lst") == 0) | |
365 | return tc_filter_list(argc-1, argv+1); | |
366 | if (matches(*argv, "help") == 0) | |
367 | usage(); | |
368 | fprintf(stderr, "Command \"%s\" is unknown, try \"tc filter help\".\n", *argv); | |
024481bb | 369 | return -1; |
aba5acdf SH |
370 | } |
371 |