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aba5acdf SH |
1 | /* |
2 | * m_police.c Parse/print policing module options. | |
3 | * | |
4 | * This program is free software; you can u32istribute 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> | |
ae665a52 SH |
10 | * FIXES: 19990619 - J Hadi Salim (hadi@cyberus.ca) |
11 | * simple addattr packaging fix. | |
2373fde9 SH |
12 | * 2002: J Hadi Salim - Add tc action extensions syntax |
13 | * | |
aba5acdf SH |
14 | */ |
15 | ||
16 | #include <stdio.h> | |
17 | #include <stdlib.h> | |
18 | #include <unistd.h> | |
19 | #include <syslog.h> | |
20 | #include <fcntl.h> | |
21 | #include <sys/socket.h> | |
22 | #include <netinet/in.h> | |
23 | #include <arpa/inet.h> | |
24 | #include <string.h> | |
25 | ||
26 | #include "utils.h" | |
27 | #include "tc_util.h" | |
28 | ||
95812b56 | 29 | struct action_util police_action_util = { |
2373fde9 SH |
30 | .id = "police", |
31 | .parse_aopt = act_parse_police, | |
32 | .print_aopt = print_police, | |
2373fde9 SH |
33 | }; |
34 | ||
ebf32083 | 35 | static void usage(void) |
aba5acdf SH |
36 | { |
37 | fprintf(stderr, "Usage: ... police rate BPS burst BYTES[/BYTES] [ mtu BYTES[/BYTES] ]\n"); | |
f71f75f3 | 38 | fprintf(stderr, " [ peakrate BPS ] [ avrate BPS ] [ overhead BYTES ]\n"); |
3de88c4b | 39 | fprintf(stderr, " [ linklayer TYPE ] [ CONTROL ]\n"); |
292f29b4 | 40 | |
3de88c4b RM |
41 | fprintf(stderr, "Where: CONTROL := conform-exceed <EXCEEDACT>[/NOTEXCEEDACT]\n"); |
42 | fprintf(stderr, " Define how to handle packets which exceed (<EXCEEDACT>)\n"); | |
43 | fprintf(stderr, " or conform (<NOTEXCEEDACT>) the configured bandwidth limit.\n"); | |
44 | fprintf(stderr, " EXCEEDACT/NOTEXCEEDACT := { pipe | ok | reclassify | drop | continue }\n"); | |
ebf32083 | 45 | exit(-1); |
aba5acdf SH |
46 | } |
47 | ||
48 | static void explain1(char *arg) | |
49 | { | |
50 | fprintf(stderr, "Illegal \"%s\"\n", arg); | |
51 | } | |
52 | ||
d1f28cf1 | 53 | static int get_police_result(int *action, int *result, char *arg) |
aba5acdf SH |
54 | { |
55 | char *p = strchr(arg, '/'); | |
56 | ||
57 | if (p) | |
58 | *p = 0; | |
59 | ||
69f5aff6 | 60 | if (action_a2n(arg, action, true)) { |
aba5acdf SH |
61 | if (p) |
62 | *p = '/'; | |
63 | return -1; | |
64 | } | |
65 | ||
66 | if (p) { | |
67 | *p = '/'; | |
69f5aff6 | 68 | if (action_a2n(p+1, result, true)) |
aba5acdf SH |
69 | return -1; |
70 | } | |
71 | return 0; | |
72 | } | |
73 | ||
45c68379 JHS |
74 | int act_parse_police(struct action_util *a, int *argc_p, char ***argv_p, |
75 | int tca_id, struct nlmsghdr *n) | |
aba5acdf SH |
76 | { |
77 | int argc = *argc_p; | |
78 | char **argv = *argv_p; | |
79 | int res = -1; | |
32a121cb | 80 | int ok = 0; |
d17b136f | 81 | struct tc_police p = { .action = TC_POLICE_RECLASSIFY }; |
aba5acdf SH |
82 | __u32 rtab[256]; |
83 | __u32 ptab[256]; | |
84 | __u32 avrate = 0; | |
85 | int presult = 0; | |
32a121cb SH |
86 | unsigned buffer = 0, mtu = 0, mpu = 0; |
87 | unsigned short overhead = 0; | |
292f29b4 | 88 | unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */ |
32a121cb | 89 | int Rcell_log = -1, Pcell_log = -1; |
aba5acdf SH |
90 | struct rtattr *tail; |
91 | ||
2373fde9 SH |
92 | if (a) /* new way of doing things */ |
93 | NEXT_ARG(); | |
94 | ||
aba5acdf SH |
95 | if (argc <= 0) |
96 | return -1; | |
97 | ||
98 | while (argc > 0) { | |
2373fde9 | 99 | |
aba5acdf SH |
100 | if (matches(*argv, "index") == 0) { |
101 | NEXT_ARG(); | |
2373fde9 | 102 | if (get_u32(&p.index, *argv, 10)) { |
aba5acdf SH |
103 | fprintf(stderr, "Illegal \"index\"\n"); |
104 | return -1; | |
105 | } | |
106 | } else if (matches(*argv, "burst") == 0 || | |
107 | strcmp(*argv, "buffer") == 0 || | |
108 | strcmp(*argv, "maxburst") == 0) { | |
109 | NEXT_ARG(); | |
110 | if (buffer) { | |
111 | fprintf(stderr, "Double \"buffer/burst\" spec\n"); | |
112 | return -1; | |
113 | } | |
114 | if (get_size_and_cell(&buffer, &Rcell_log, *argv) < 0) { | |
115 | explain1("buffer"); | |
116 | return -1; | |
117 | } | |
118 | } else if (strcmp(*argv, "mtu") == 0 || | |
119 | strcmp(*argv, "minburst") == 0) { | |
120 | NEXT_ARG(); | |
121 | if (mtu) { | |
122 | fprintf(stderr, "Double \"mtu/minburst\" spec\n"); | |
123 | return -1; | |
124 | } | |
125 | if (get_size_and_cell(&mtu, &Pcell_log, *argv) < 0) { | |
126 | explain1("mtu"); | |
127 | return -1; | |
128 | } | |
129 | } else if (strcmp(*argv, "mpu") == 0) { | |
130 | NEXT_ARG(); | |
131 | if (mpu) { | |
132 | fprintf(stderr, "Double \"mpu\" spec\n"); | |
133 | return -1; | |
134 | } | |
135 | if (get_size(&mpu, *argv)) { | |
136 | explain1("mpu"); | |
137 | return -1; | |
138 | } | |
139 | } else if (strcmp(*argv, "rate") == 0) { | |
140 | NEXT_ARG(); | |
141 | if (p.rate.rate) { | |
142 | fprintf(stderr, "Double \"rate\" spec\n"); | |
143 | return -1; | |
144 | } | |
145 | if (get_rate(&p.rate.rate, *argv)) { | |
146 | explain1("rate"); | |
147 | return -1; | |
148 | } | |
149 | } else if (strcmp(*argv, "avrate") == 0) { | |
150 | NEXT_ARG(); | |
151 | if (avrate) { | |
152 | fprintf(stderr, "Double \"avrate\" spec\n"); | |
153 | return -1; | |
154 | } | |
155 | if (get_rate(&avrate, *argv)) { | |
156 | explain1("avrate"); | |
157 | return -1; | |
158 | } | |
159 | } else if (matches(*argv, "peakrate") == 0) { | |
160 | NEXT_ARG(); | |
161 | if (p.peakrate.rate) { | |
162 | fprintf(stderr, "Double \"peakrate\" spec\n"); | |
163 | return -1; | |
164 | } | |
165 | if (get_rate(&p.peakrate.rate, *argv)) { | |
166 | explain1("peakrate"); | |
167 | return -1; | |
168 | } | |
169 | } else if (matches(*argv, "reclassify") == 0) { | |
170 | p.action = TC_POLICE_RECLASSIFY; | |
171 | } else if (matches(*argv, "drop") == 0 || | |
172 | matches(*argv, "shot") == 0) { | |
173 | p.action = TC_POLICE_SHOT; | |
174 | } else if (matches(*argv, "continue") == 0) { | |
175 | p.action = TC_POLICE_UNSPEC; | |
176 | } else if (matches(*argv, "pass") == 0) { | |
177 | p.action = TC_POLICE_OK; | |
2373fde9 SH |
178 | } else if (matches(*argv, "pipe") == 0) { |
179 | p.action = TC_POLICE_PIPE; | |
4bfb21ca | 180 | } else if (strcmp(*argv, "conform-exceed") == 0) { |
aba5acdf SH |
181 | NEXT_ARG(); |
182 | if (get_police_result(&p.action, &presult, *argv)) { | |
183 | fprintf(stderr, "Illegal \"action\"\n"); | |
184 | return -1; | |
185 | } | |
f71f75f3 JDB |
186 | } else if (matches(*argv, "overhead") == 0) { |
187 | NEXT_ARG(); | |
188 | if (get_u16(&overhead, *argv, 10)) { | |
189 | explain1("overhead"); return -1; | |
190 | } | |
292f29b4 JDB |
191 | } else if (matches(*argv, "linklayer") == 0) { |
192 | NEXT_ARG(); | |
193 | if (get_linklayer(&linklayer, *argv)) { | |
194 | explain1("linklayer"); return -1; | |
195 | } | |
aba5acdf | 196 | } else if (strcmp(*argv, "help") == 0) { |
ebf32083 | 197 | usage(); |
aba5acdf | 198 | } else { |
ef1d6f97 | 199 | break; |
aba5acdf SH |
200 | } |
201 | ok++; | |
202 | argc--; argv++; | |
203 | } | |
204 | ||
205 | if (!ok) | |
206 | return -1; | |
207 | ||
45c68379 JHS |
208 | if (p.rate.rate && avrate) |
209 | return -1; | |
210 | ||
211 | /* Must at least do late binding, use TB or ewma policing */ | |
212 | if (!p.rate.rate && !avrate && !p.index) { | |
213 | fprintf(stderr, "\"rate\" or \"avrate\" MUST be specified.\n"); | |
214 | return -1; | |
215 | } | |
216 | ||
217 | /* When the TB policer is used, burst is required */ | |
218 | if (p.rate.rate && !buffer && !avrate) { | |
aba5acdf SH |
219 | fprintf(stderr, "\"burst\" requires \"rate\".\n"); |
220 | return -1; | |
221 | } | |
45c68379 | 222 | |
aba5acdf SH |
223 | if (p.peakrate.rate) { |
224 | if (!p.rate.rate) { | |
225 | fprintf(stderr, "\"peakrate\" requires \"rate\".\n"); | |
226 | return -1; | |
227 | } | |
228 | if (!mtu) { | |
229 | fprintf(stderr, "\"mtu\" is required, if \"peakrate\" is requested.\n"); | |
230 | return -1; | |
231 | } | |
232 | } | |
233 | ||
234 | if (p.rate.rate) { | |
d5f46f9c | 235 | p.rate.mpu = mpu; |
f71f75f3 | 236 | p.rate.overhead = overhead; |
45c68379 JHS |
237 | if (tc_calc_rtable(&p.rate, rtab, Rcell_log, mtu, |
238 | linklayer) < 0) { | |
239 | fprintf(stderr, "POLICE: failed to calculate rate table.\n"); | |
aba5acdf SH |
240 | return -1; |
241 | } | |
242 | p.burst = tc_calc_xmittime(p.rate.rate, buffer); | |
aba5acdf SH |
243 | } |
244 | p.mtu = mtu; | |
245 | if (p.peakrate.rate) { | |
d5f46f9c | 246 | p.peakrate.mpu = mpu; |
f71f75f3 | 247 | p.peakrate.overhead = overhead; |
45c68379 JHS |
248 | if (tc_calc_rtable(&p.peakrate, ptab, Pcell_log, mtu, |
249 | linklayer) < 0) { | |
aba5acdf SH |
250 | fprintf(stderr, "POLICE: failed to calculate peak rate table.\n"); |
251 | return -1; | |
252 | } | |
aba5acdf SH |
253 | } |
254 | ||
1b52a762 | 255 | tail = NLMSG_TAIL(n); |
2373fde9 SH |
256 | addattr_l(n, MAX_MSG, tca_id, NULL, 0); |
257 | addattr_l(n, MAX_MSG, TCA_POLICE_TBF, &p, sizeof(p)); | |
aba5acdf | 258 | if (p.rate.rate) |
2373fde9 | 259 | addattr_l(n, MAX_MSG, TCA_POLICE_RATE, rtab, 1024); |
aba5acdf | 260 | if (p.peakrate.rate) |
32a121cb | 261 | addattr_l(n, MAX_MSG, TCA_POLICE_PEAKRATE, ptab, 1024); |
aba5acdf | 262 | if (avrate) |
2373fde9 | 263 | addattr32(n, MAX_MSG, TCA_POLICE_AVRATE, avrate); |
aba5acdf | 264 | if (presult) |
2373fde9 | 265 | addattr32(n, MAX_MSG, TCA_POLICE_RESULT, presult); |
aba5acdf | 266 | |
1b52a762 | 267 | tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; |
aba5acdf SH |
268 | res = 0; |
269 | ||
270 | *argc_p = argc; | |
271 | *argv_p = argv; | |
272 | return res; | |
273 | } | |
274 | ||
2373fde9 SH |
275 | int parse_police(int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n) |
276 | { | |
32a121cb | 277 | return act_parse_police(NULL, argc_p, argv_p, tca_id, n); |
2373fde9 | 278 | } |
aba5acdf | 279 | |
45c68379 | 280 | int print_police(struct action_util *a, FILE *f, struct rtattr *arg) |
aba5acdf SH |
281 | { |
282 | SPRINT_BUF(b1); | |
3e92ff52 | 283 | SPRINT_BUF(b2); |
aba5acdf SH |
284 | struct tc_police *p; |
285 | struct rtattr *tb[TCA_POLICE_MAX+1]; | |
32a121cb | 286 | unsigned int buffer; |
3e92ff52 | 287 | unsigned int linklayer; |
aba5acdf SH |
288 | |
289 | if (arg == NULL) | |
290 | return 0; | |
291 | ||
14ee9e61 | 292 | parse_rtattr_nested(tb, TCA_POLICE_MAX, arg); |
aba5acdf SH |
293 | |
294 | if (tb[TCA_POLICE_TBF] == NULL) { | |
295 | fprintf(f, "[NULL police tbf]"); | |
296 | return 0; | |
297 | } | |
2373fde9 | 298 | #ifndef STOOPID_8BYTE |
aba5acdf SH |
299 | if (RTA_PAYLOAD(tb[TCA_POLICE_TBF]) < sizeof(*p)) { |
300 | fprintf(f, "[truncated police tbf]"); | |
301 | return -1; | |
302 | } | |
2373fde9 | 303 | #endif |
aba5acdf SH |
304 | p = RTA_DATA(tb[TCA_POLICE_TBF]); |
305 | ||
2373fde9 | 306 | fprintf(f, " police 0x%x ", p->index); |
aba5acdf | 307 | fprintf(f, "rate %s ", sprint_rate(p->rate.rate, b1)); |
76dc0aa2 | 308 | buffer = tc_calc_xmitsize(p->rate.rate, p->burst); |
aba5acdf SH |
309 | fprintf(f, "burst %s ", sprint_size(buffer, b1)); |
310 | fprintf(f, "mtu %s ", sprint_size(p->mtu, b1)); | |
311 | if (show_raw) | |
312 | fprintf(f, "[%08x] ", p->burst); | |
e6263c85 | 313 | |
aba5acdf SH |
314 | if (p->peakrate.rate) |
315 | fprintf(f, "peakrate %s ", sprint_rate(p->peakrate.rate, b1)); | |
e6263c85 | 316 | |
aba5acdf | 317 | if (tb[TCA_POLICE_AVRATE]) |
45c68379 JHS |
318 | fprintf(f, "avrate %s ", |
319 | sprint_rate(rta_getattr_u32(tb[TCA_POLICE_AVRATE]), | |
320 | b1)); | |
70932006 | 321 | fprintf(f, "action %s", action_n2a(p->action)); |
e6263c85 | 322 | |
2373fde9 | 323 | if (tb[TCA_POLICE_RESULT]) { |
e6263c85 SH |
324 | __u32 action = rta_getattr_u32(tb[TCA_POLICE_RESULT]); |
325 | ||
cef49e51 | 326 | fprintf(f, "/%s ", action_n2a(action)); |
2373fde9 SH |
327 | } else |
328 | fprintf(f, " "); | |
e6263c85 | 329 | |
f71f75f3 | 330 | fprintf(f, "overhead %ub ", p->rate.overhead); |
3e92ff52 JDB |
331 | linklayer = (p->rate.linklayer & TC_LINKLAYER_MASK); |
332 | if (linklayer > TC_LINKLAYER_ETHERNET || show_details) | |
333 | fprintf(f, "linklayer %s ", sprint_linklayer(linklayer, b2)); | |
ead954cb JHS |
334 | fprintf(f, "\n\tref %d bind %d", p->refcnt, p->bindcnt); |
335 | if (show_stats) { | |
336 | if (tb[TCA_POLICE_TM]) { | |
337 | struct tcf_t *tm = RTA_DATA(tb[TCA_POLICE_TM]); | |
338 | ||
339 | print_tm(f, tm); | |
340 | } | |
341 | } | |
342 | fprintf(f, "\n"); | |
343 | ||
aba5acdf SH |
344 | |
345 | return 0; | |
346 | } | |
347 | ||
45c68379 JHS |
348 | int tc_print_police(FILE *f, struct rtattr *arg) |
349 | { | |
32a121cb | 350 | return print_police(&police_action_util, f, arg); |
2373fde9 | 351 | } |