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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> | |
aba5acdf SH |
19 | #include <fcntl.h> |
20 | #include <sys/socket.h> | |
21 | #include <netinet/in.h> | |
22 | #include <arpa/inet.h> | |
23 | #include <string.h> | |
24 | ||
25 | #include "utils.h" | |
26 | #include "tc_util.h" | |
27 | ||
95812b56 | 28 | struct action_util police_action_util = { |
2373fde9 SH |
29 | .id = "police", |
30 | .parse_aopt = act_parse_police, | |
31 | .print_aopt = print_police, | |
2373fde9 SH |
32 | }; |
33 | ||
ebf32083 | 34 | static void usage(void) |
aba5acdf SH |
35 | { |
36 | fprintf(stderr, "Usage: ... police rate BPS burst BYTES[/BYTES] [ mtu BYTES[/BYTES] ]\n"); | |
f71f75f3 | 37 | fprintf(stderr, " [ peakrate BPS ] [ avrate BPS ] [ overhead BYTES ]\n"); |
3de88c4b | 38 | fprintf(stderr, " [ linklayer TYPE ] [ CONTROL ]\n"); |
292f29b4 | 39 | |
3de88c4b RM |
40 | fprintf(stderr, "Where: CONTROL := conform-exceed <EXCEEDACT>[/NOTEXCEEDACT]\n"); |
41 | fprintf(stderr, " Define how to handle packets which exceed (<EXCEEDACT>)\n"); | |
42 | fprintf(stderr, " or conform (<NOTEXCEEDACT>) the configured bandwidth limit.\n"); | |
d19f72f7 JP |
43 | fprintf(stderr, " EXCEEDACT/NOTEXCEEDACT := { pipe | ok | reclassify | drop | continue |\n"); |
44 | fprintf(stderr, " goto chain <CHAIN_INDEX> }\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 | ||
45c68379 JHS |
53 | int act_parse_police(struct action_util *a, int *argc_p, char ***argv_p, |
54 | int tca_id, struct nlmsghdr *n) | |
aba5acdf SH |
55 | { |
56 | int argc = *argc_p; | |
57 | char **argv = *argv_p; | |
58 | int res = -1; | |
32a121cb | 59 | int ok = 0; |
d17b136f | 60 | struct tc_police p = { .action = TC_POLICE_RECLASSIFY }; |
aba5acdf SH |
61 | __u32 rtab[256]; |
62 | __u32 ptab[256]; | |
63 | __u32 avrate = 0; | |
64 | int presult = 0; | |
32a121cb SH |
65 | unsigned buffer = 0, mtu = 0, mpu = 0; |
66 | unsigned short overhead = 0; | |
292f29b4 | 67 | unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */ |
32a121cb | 68 | int Rcell_log = -1, Pcell_log = -1; |
aba5acdf SH |
69 | struct rtattr *tail; |
70 | ||
2373fde9 SH |
71 | if (a) /* new way of doing things */ |
72 | NEXT_ARG(); | |
73 | ||
aba5acdf SH |
74 | if (argc <= 0) |
75 | return -1; | |
76 | ||
77 | while (argc > 0) { | |
2373fde9 | 78 | |
aba5acdf SH |
79 | if (matches(*argv, "index") == 0) { |
80 | NEXT_ARG(); | |
2373fde9 | 81 | if (get_u32(&p.index, *argv, 10)) { |
aba5acdf SH |
82 | fprintf(stderr, "Illegal \"index\"\n"); |
83 | return -1; | |
84 | } | |
85 | } else if (matches(*argv, "burst") == 0 || | |
86 | strcmp(*argv, "buffer") == 0 || | |
87 | strcmp(*argv, "maxburst") == 0) { | |
88 | NEXT_ARG(); | |
89 | if (buffer) { | |
90 | fprintf(stderr, "Double \"buffer/burst\" spec\n"); | |
91 | return -1; | |
92 | } | |
93 | if (get_size_and_cell(&buffer, &Rcell_log, *argv) < 0) { | |
94 | explain1("buffer"); | |
95 | return -1; | |
96 | } | |
97 | } else if (strcmp(*argv, "mtu") == 0 || | |
98 | strcmp(*argv, "minburst") == 0) { | |
99 | NEXT_ARG(); | |
100 | if (mtu) { | |
101 | fprintf(stderr, "Double \"mtu/minburst\" spec\n"); | |
102 | return -1; | |
103 | } | |
104 | if (get_size_and_cell(&mtu, &Pcell_log, *argv) < 0) { | |
105 | explain1("mtu"); | |
106 | return -1; | |
107 | } | |
108 | } else if (strcmp(*argv, "mpu") == 0) { | |
109 | NEXT_ARG(); | |
110 | if (mpu) { | |
111 | fprintf(stderr, "Double \"mpu\" spec\n"); | |
112 | return -1; | |
113 | } | |
114 | if (get_size(&mpu, *argv)) { | |
115 | explain1("mpu"); | |
116 | return -1; | |
117 | } | |
118 | } else if (strcmp(*argv, "rate") == 0) { | |
119 | NEXT_ARG(); | |
120 | if (p.rate.rate) { | |
121 | fprintf(stderr, "Double \"rate\" spec\n"); | |
122 | return -1; | |
123 | } | |
124 | if (get_rate(&p.rate.rate, *argv)) { | |
125 | explain1("rate"); | |
126 | return -1; | |
127 | } | |
128 | } else if (strcmp(*argv, "avrate") == 0) { | |
129 | NEXT_ARG(); | |
130 | if (avrate) { | |
131 | fprintf(stderr, "Double \"avrate\" spec\n"); | |
132 | return -1; | |
133 | } | |
134 | if (get_rate(&avrate, *argv)) { | |
135 | explain1("avrate"); | |
136 | return -1; | |
137 | } | |
138 | } else if (matches(*argv, "peakrate") == 0) { | |
139 | NEXT_ARG(); | |
140 | if (p.peakrate.rate) { | |
141 | fprintf(stderr, "Double \"peakrate\" spec\n"); | |
142 | return -1; | |
143 | } | |
144 | if (get_rate(&p.peakrate.rate, *argv)) { | |
145 | explain1("peakrate"); | |
146 | return -1; | |
147 | } | |
e67aba55 JP |
148 | } else if (matches(*argv, "reclassify") == 0 || |
149 | matches(*argv, "drop") == 0 || | |
150 | matches(*argv, "shot") == 0 || | |
151 | matches(*argv, "continue") == 0 || | |
152 | matches(*argv, "pass") == 0 || | |
75ef7b18 | 153 | matches(*argv, "ok") == 0 || |
d19f72f7 JP |
154 | matches(*argv, "pipe") == 0 || |
155 | matches(*argv, "goto") == 0) { | |
75ef7b18 DC |
156 | if (!parse_action_control(&argc, &argv, &p.action, false)) |
157 | goto action_ctrl_ok; | |
158 | return -1; | |
4bfb21ca | 159 | } else if (strcmp(*argv, "conform-exceed") == 0) { |
aba5acdf | 160 | NEXT_ARG(); |
75ef7b18 DC |
161 | if (!parse_action_control_slash(&argc, &argv, &p.action, |
162 | &presult, true)) | |
163 | goto action_ctrl_ok; | |
164 | return -1; | |
f71f75f3 JDB |
165 | } else if (matches(*argv, "overhead") == 0) { |
166 | NEXT_ARG(); | |
167 | if (get_u16(&overhead, *argv, 10)) { | |
168 | explain1("overhead"); return -1; | |
169 | } | |
292f29b4 JDB |
170 | } else if (matches(*argv, "linklayer") == 0) { |
171 | NEXT_ARG(); | |
172 | if (get_linklayer(&linklayer, *argv)) { | |
173 | explain1("linklayer"); return -1; | |
174 | } | |
aba5acdf | 175 | } else if (strcmp(*argv, "help") == 0) { |
ebf32083 | 176 | usage(); |
aba5acdf | 177 | } else { |
ef1d6f97 | 178 | break; |
aba5acdf | 179 | } |
75ef7b18 DC |
180 | NEXT_ARG_FWD(); |
181 | action_ctrl_ok: | |
aba5acdf | 182 | ok++; |
aba5acdf SH |
183 | } |
184 | ||
185 | if (!ok) | |
186 | return -1; | |
187 | ||
45c68379 JHS |
188 | if (p.rate.rate && avrate) |
189 | return -1; | |
190 | ||
191 | /* Must at least do late binding, use TB or ewma policing */ | |
192 | if (!p.rate.rate && !avrate && !p.index) { | |
193 | fprintf(stderr, "\"rate\" or \"avrate\" MUST be specified.\n"); | |
194 | return -1; | |
195 | } | |
196 | ||
197 | /* When the TB policer is used, burst is required */ | |
198 | if (p.rate.rate && !buffer && !avrate) { | |
aba5acdf SH |
199 | fprintf(stderr, "\"burst\" requires \"rate\".\n"); |
200 | return -1; | |
201 | } | |
45c68379 | 202 | |
aba5acdf SH |
203 | if (p.peakrate.rate) { |
204 | if (!p.rate.rate) { | |
205 | fprintf(stderr, "\"peakrate\" requires \"rate\".\n"); | |
206 | return -1; | |
207 | } | |
208 | if (!mtu) { | |
209 | fprintf(stderr, "\"mtu\" is required, if \"peakrate\" is requested.\n"); | |
210 | return -1; | |
211 | } | |
212 | } | |
213 | ||
214 | if (p.rate.rate) { | |
d5f46f9c | 215 | p.rate.mpu = mpu; |
f71f75f3 | 216 | p.rate.overhead = overhead; |
45c68379 JHS |
217 | if (tc_calc_rtable(&p.rate, rtab, Rcell_log, mtu, |
218 | linklayer) < 0) { | |
219 | fprintf(stderr, "POLICE: failed to calculate rate table.\n"); | |
aba5acdf SH |
220 | return -1; |
221 | } | |
222 | p.burst = tc_calc_xmittime(p.rate.rate, buffer); | |
aba5acdf SH |
223 | } |
224 | p.mtu = mtu; | |
225 | if (p.peakrate.rate) { | |
d5f46f9c | 226 | p.peakrate.mpu = mpu; |
f71f75f3 | 227 | p.peakrate.overhead = overhead; |
45c68379 JHS |
228 | if (tc_calc_rtable(&p.peakrate, ptab, Pcell_log, mtu, |
229 | linklayer) < 0) { | |
aba5acdf SH |
230 | fprintf(stderr, "POLICE: failed to calculate peak rate table.\n"); |
231 | return -1; | |
232 | } | |
aba5acdf SH |
233 | } |
234 | ||
1b52a762 | 235 | tail = NLMSG_TAIL(n); |
2373fde9 SH |
236 | addattr_l(n, MAX_MSG, tca_id, NULL, 0); |
237 | addattr_l(n, MAX_MSG, TCA_POLICE_TBF, &p, sizeof(p)); | |
aba5acdf | 238 | if (p.rate.rate) |
2373fde9 | 239 | addattr_l(n, MAX_MSG, TCA_POLICE_RATE, rtab, 1024); |
aba5acdf | 240 | if (p.peakrate.rate) |
32a121cb | 241 | addattr_l(n, MAX_MSG, TCA_POLICE_PEAKRATE, ptab, 1024); |
aba5acdf | 242 | if (avrate) |
2373fde9 | 243 | addattr32(n, MAX_MSG, TCA_POLICE_AVRATE, avrate); |
aba5acdf | 244 | if (presult) |
2373fde9 | 245 | addattr32(n, MAX_MSG, TCA_POLICE_RESULT, presult); |
aba5acdf | 246 | |
1b52a762 | 247 | tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; |
aba5acdf SH |
248 | res = 0; |
249 | ||
250 | *argc_p = argc; | |
251 | *argv_p = argv; | |
252 | return res; | |
253 | } | |
254 | ||
2373fde9 SH |
255 | int parse_police(int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n) |
256 | { | |
32a121cb | 257 | return act_parse_police(NULL, argc_p, argv_p, tca_id, n); |
2373fde9 | 258 | } |
aba5acdf | 259 | |
45c68379 | 260 | int print_police(struct action_util *a, FILE *f, struct rtattr *arg) |
aba5acdf SH |
261 | { |
262 | SPRINT_BUF(b1); | |
3e92ff52 | 263 | SPRINT_BUF(b2); |
aba5acdf SH |
264 | struct tc_police *p; |
265 | struct rtattr *tb[TCA_POLICE_MAX+1]; | |
32a121cb | 266 | unsigned int buffer; |
3e92ff52 | 267 | unsigned int linklayer; |
aba5acdf SH |
268 | |
269 | if (arg == NULL) | |
270 | return 0; | |
271 | ||
14ee9e61 | 272 | parse_rtattr_nested(tb, TCA_POLICE_MAX, arg); |
aba5acdf SH |
273 | |
274 | if (tb[TCA_POLICE_TBF] == NULL) { | |
275 | fprintf(f, "[NULL police tbf]"); | |
276 | return 0; | |
277 | } | |
2373fde9 | 278 | #ifndef STOOPID_8BYTE |
aba5acdf SH |
279 | if (RTA_PAYLOAD(tb[TCA_POLICE_TBF]) < sizeof(*p)) { |
280 | fprintf(f, "[truncated police tbf]"); | |
281 | return -1; | |
282 | } | |
2373fde9 | 283 | #endif |
aba5acdf SH |
284 | p = RTA_DATA(tb[TCA_POLICE_TBF]); |
285 | ||
2373fde9 | 286 | fprintf(f, " police 0x%x ", p->index); |
aba5acdf | 287 | fprintf(f, "rate %s ", sprint_rate(p->rate.rate, b1)); |
76dc0aa2 | 288 | buffer = tc_calc_xmitsize(p->rate.rate, p->burst); |
aba5acdf SH |
289 | fprintf(f, "burst %s ", sprint_size(buffer, b1)); |
290 | fprintf(f, "mtu %s ", sprint_size(p->mtu, b1)); | |
291 | if (show_raw) | |
292 | fprintf(f, "[%08x] ", p->burst); | |
e6263c85 | 293 | |
aba5acdf SH |
294 | if (p->peakrate.rate) |
295 | fprintf(f, "peakrate %s ", sprint_rate(p->peakrate.rate, b1)); | |
e6263c85 | 296 | |
aba5acdf | 297 | if (tb[TCA_POLICE_AVRATE]) |
45c68379 JHS |
298 | fprintf(f, "avrate %s ", |
299 | sprint_rate(rta_getattr_u32(tb[TCA_POLICE_AVRATE]), | |
300 | b1)); | |
e67aba55 JP |
301 | |
302 | print_action_control(f, "action ", p->action, ""); | |
e6263c85 | 303 | |
2373fde9 | 304 | if (tb[TCA_POLICE_RESULT]) { |
e6263c85 SH |
305 | __u32 action = rta_getattr_u32(tb[TCA_POLICE_RESULT]); |
306 | ||
e67aba55 | 307 | print_action_control(f, "/", action, " "); |
2373fde9 SH |
308 | } else |
309 | fprintf(f, " "); | |
e6263c85 | 310 | |
f71f75f3 | 311 | fprintf(f, "overhead %ub ", p->rate.overhead); |
3e92ff52 JDB |
312 | linklayer = (p->rate.linklayer & TC_LINKLAYER_MASK); |
313 | if (linklayer > TC_LINKLAYER_ETHERNET || show_details) | |
314 | fprintf(f, "linklayer %s ", sprint_linklayer(linklayer, b2)); | |
ead954cb JHS |
315 | fprintf(f, "\n\tref %d bind %d", p->refcnt, p->bindcnt); |
316 | if (show_stats) { | |
317 | if (tb[TCA_POLICE_TM]) { | |
318 | struct tcf_t *tm = RTA_DATA(tb[TCA_POLICE_TM]); | |
319 | ||
320 | print_tm(f, tm); | |
321 | } | |
322 | } | |
323 | fprintf(f, "\n"); | |
324 | ||
aba5acdf SH |
325 | |
326 | return 0; | |
327 | } | |
328 | ||
45c68379 JHS |
329 | int tc_print_police(FILE *f, struct rtattr *arg) |
330 | { | |
32a121cb | 331 | return print_police(&police_action_util, f, arg); |
2373fde9 | 332 | } |