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 (at) ms2.inr.ac.ru> 10 * FIXES: 19990619 - J Hadi Salim (hadi (at) cyberus.ca) 11 * simple addattr packaging fix. 12 * 2002: J Hadi Salim - Add tc action extensions syntax 13 * 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 29 struct action_util police_action_util = { 30 .id = "police", 31 .parse_aopt = act_parse_police, 32 .print_aopt = print_police, 33 }; 34 35 static void usage(void) 36 { 37 fprintf(stderr, "Usage: ... police rate BPS burst BYTES[/BYTES] [ mtu BYTES[/BYTES] ]\n"); 38 fprintf(stderr, " [ peakrate BPS ] [ avrate BPS ] [ overhead BYTES ]\n"); 39 fprintf(stderr, " [ linklayer TYPE ] [ ACTIONTERM ]\n"); 40 41 fprintf(stderr, "New Syntax ACTIONTERM := conform-exceed <EXCEEDACT>[/NOTEXCEEDACT] \n"); 42 fprintf(stderr, "Where: *EXCEEDACT := pipe | ok | reclassify | drop | continue \n"); 43 fprintf(stderr, "Where: pipe is only valid for new syntax \n"); 44 exit(-1); 45 } 46 47 static void explain1(char *arg) 48 { 49 fprintf(stderr, "Illegal \"%s\"\n", arg); 50 } 51 52 static const char *police_action_n2a(int action, char *buf, int len) 53 { 54 switch (action) { 55 case -1: 56 return "continue"; 57 break; 58 case TC_POLICE_OK: 59 return "pass"; 60 break; 61 case TC_POLICE_SHOT: 62 return "drop"; 63 break; 64 case TC_POLICE_RECLASSIFY: 65 return "reclassify"; 66 case TC_POLICE_PIPE: 67 return "pipe"; 68 default: 69 snprintf(buf, len, "%d", action); 70 return buf; 71 } 72 } 73 74 static int police_action_a2n(const char *arg, int *result) 75 { 76 int res; 77 78 if (matches(arg, "continue") == 0) 79 res = -1; 80 else if (matches(arg, "drop") == 0) 81 res = TC_POLICE_SHOT; 82 else if (matches(arg, "shot") == 0) 83 res = TC_POLICE_SHOT; 84 else if (matches(arg, "pass") == 0) 85 res = TC_POLICE_OK; 86 else if (strcmp(arg, "ok") == 0) 87 res = TC_POLICE_OK; 88 else if (matches(arg, "reclassify") == 0) 89 res = TC_POLICE_RECLASSIFY; 90 else if (matches(arg, "pipe") == 0) 91 res = TC_POLICE_PIPE; 92 else { 93 char dummy; 94 if (sscanf(arg, "%d%c", &res, &dummy) != 1) 95 return -1; 96 } 97 *result = res; 98 return 0; 99 } 100 101 102 static int get_police_result(int *action, int *result, char *arg) 103 { 104 char *p = strchr(arg, '/'); 105 106 if (p) 107 *p = 0; 108 109 if (police_action_a2n(arg, action)) { 110 if (p) 111 *p = '/'; 112 return -1; 113 } 114 115 if (p) { 116 *p = '/'; 117 if (police_action_a2n(p+1, result)) 118 return -1; 119 } 120 return 0; 121 } 122 123 124 int act_parse_police(struct action_util *a,int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n) 125 { 126 int argc = *argc_p; 127 char **argv = *argv_p; 128 int res = -1; 129 int ok=0; 130 struct tc_police p; 131 __u32 rtab[256]; 132 __u32 ptab[256]; 133 __u32 avrate = 0; 134 int presult = 0; 135 unsigned buffer=0, mtu=0, mpu=0; 136 unsigned short overhead=0; 137 unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */ 138 int Rcell_log=-1, Pcell_log = -1; 139 struct rtattr *tail; 140 141 memset(&p, 0, sizeof(p)); 142 p.action = TC_POLICE_RECLASSIFY; 143 144 if (a) /* new way of doing things */ 145 NEXT_ARG(); 146 147 if (argc <= 0) 148 return -1; 149 150 while (argc > 0) { 151 152 if (matches(*argv, "index") == 0) { 153 NEXT_ARG(); 154 if (get_u32(&p.index, *argv, 10)) { 155 fprintf(stderr, "Illegal \"index\"\n"); 156 return -1; 157 } 158 } else if (matches(*argv, "burst") == 0 || 159 strcmp(*argv, "buffer") == 0 || 160 strcmp(*argv, "maxburst") == 0) { 161 NEXT_ARG(); 162 if (buffer) { 163 fprintf(stderr, "Double \"buffer/burst\" spec\n"); 164 return -1; 165 } 166 if (get_size_and_cell(&buffer, &Rcell_log, *argv) < 0) { 167 explain1("buffer"); 168 return -1; 169 } 170 } else if (strcmp(*argv, "mtu") == 0 || 171 strcmp(*argv, "minburst") == 0) { 172 NEXT_ARG(); 173 if (mtu) { 174 fprintf(stderr, "Double \"mtu/minburst\" spec\n"); 175 return -1; 176 } 177 if (get_size_and_cell(&mtu, &Pcell_log, *argv) < 0) { 178 explain1("mtu"); 179 return -1; 180 } 181 } else if (strcmp(*argv, "mpu") == 0) { 182 NEXT_ARG(); 183 if (mpu) { 184 fprintf(stderr, "Double \"mpu\" spec\n"); 185 return -1; 186 } 187 if (get_size(&mpu, *argv)) { 188 explain1("mpu"); 189 return -1; 190 } 191 } else if (strcmp(*argv, "rate") == 0) { 192 NEXT_ARG(); 193 if (p.rate.rate) { 194 fprintf(stderr, "Double \"rate\" spec\n"); 195 return -1; 196 } 197 if (get_rate(&p.rate.rate, *argv)) { 198 explain1("rate"); 199 return -1; 200 } 201 } else if (strcmp(*argv, "avrate") == 0) { 202 NEXT_ARG(); 203 if (avrate) { 204 fprintf(stderr, "Double \"avrate\" spec\n"); 205 return -1; 206 } 207 if (get_rate(&avrate, *argv)) { 208 explain1("avrate"); 209 return -1; 210 } 211 } else if (matches(*argv, "peakrate") == 0) { 212 NEXT_ARG(); 213 if (p.peakrate.rate) { 214 fprintf(stderr, "Double \"peakrate\" spec\n"); 215 return -1; 216 } 217 if (get_rate(&p.peakrate.rate, *argv)) { 218 explain1("peakrate"); 219 return -1; 220 } 221 } else if (matches(*argv, "reclassify") == 0) { 222 p.action = TC_POLICE_RECLASSIFY; 223 } else if (matches(*argv, "drop") == 0 || 224 matches(*argv, "shot") == 0) { 225 p.action = TC_POLICE_SHOT; 226 } else if (matches(*argv, "continue") == 0) { 227 p.action = TC_POLICE_UNSPEC; 228 } else if (matches(*argv, "pass") == 0) { 229 p.action = TC_POLICE_OK; 230 } else if (matches(*argv, "pipe") == 0) { 231 p.action = TC_POLICE_PIPE; 232 } else if (strcmp(*argv, "conform-exceed") == 0) { 233 NEXT_ARG(); 234 if (get_police_result(&p.action, &presult, *argv)) { 235 fprintf(stderr, "Illegal \"action\"\n"); 236 return -1; 237 } 238 } else if (matches(*argv, "overhead") == 0) { 239 NEXT_ARG(); 240 if (get_u16(&overhead, *argv, 10)) { 241 explain1("overhead"); return -1; 242 } 243 } else if (matches(*argv, "linklayer") == 0) { 244 NEXT_ARG(); 245 if (get_linklayer(&linklayer, *argv)) { 246 explain1("linklayer"); return -1; 247 } 248 } else if (strcmp(*argv, "help") == 0) { 249 usage(); 250 } else { 251 break; 252 } 253 ok++; 254 argc--; argv++; 255 } 256 257 if (!ok) 258 return -1; 259 260 if (p.rate.rate && !buffer) { 261 fprintf(stderr, "\"burst\" requires \"rate\".\n"); 262 return -1; 263 } 264 if (p.peakrate.rate) { 265 if (!p.rate.rate) { 266 fprintf(stderr, "\"peakrate\" requires \"rate\".\n"); 267 return -1; 268 } 269 if (!mtu) { 270 fprintf(stderr, "\"mtu\" is required, if \"peakrate\" is requested.\n"); 271 return -1; 272 } 273 } 274 275 if (p.rate.rate) { 276 p.rate.mpu = mpu; 277 p.rate.overhead = overhead; 278 if (tc_calc_rtable(&p.rate, rtab, Rcell_log, mtu, linklayer) < 0) { 279 fprintf(stderr, "TBF: failed to calculate rate table.\n"); 280 return -1; 281 } 282 p.burst = tc_calc_xmittime(p.rate.rate, buffer); 283 } 284 p.mtu = mtu; 285 if (p.peakrate.rate) { 286 p.peakrate.mpu = mpu; 287 p.peakrate.overhead = overhead; 288 if (tc_calc_rtable(&p.peakrate, ptab, Pcell_log, mtu, linklayer) < 0) { 289 fprintf(stderr, "POLICE: failed to calculate peak rate table.\n"); 290 return -1; 291 } 292 } 293 294 tail = NLMSG_TAIL(n); 295 addattr_l(n, MAX_MSG, tca_id, NULL, 0); 296 addattr_l(n, MAX_MSG, TCA_POLICE_TBF, &p, sizeof(p)); 297 if (p.rate.rate) 298 addattr_l(n, MAX_MSG, TCA_POLICE_RATE, rtab, 1024); 299 if (p.peakrate.rate) 300 addattr_l(n, MAX_MSG, TCA_POLICE_PEAKRATE, ptab, 1024); 301 if (avrate) 302 addattr32(n, MAX_MSG, TCA_POLICE_AVRATE, avrate); 303 if (presult) 304 addattr32(n, MAX_MSG, TCA_POLICE_RESULT, presult); 305 306 tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; 307 res = 0; 308 309 *argc_p = argc; 310 *argv_p = argv; 311 return res; 312 } 313 314 int parse_police(int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n) 315 { 316 return act_parse_police(NULL,argc_p,argv_p,tca_id,n); 317 } 318 319 int 320 print_police(struct action_util *a, FILE *f, struct rtattr *arg) 321 { 322 SPRINT_BUF(b1); 323 SPRINT_BUF(b2); 324 struct tc_police *p; 325 struct rtattr *tb[TCA_POLICE_MAX+1]; 326 unsigned buffer; 327 unsigned int linklayer; 328 329 if (arg == NULL) 330 return 0; 331 332 parse_rtattr_nested(tb, TCA_POLICE_MAX, arg); 333 334 if (tb[TCA_POLICE_TBF] == NULL) { 335 fprintf(f, "[NULL police tbf]"); 336 return 0; 337 } 338 #ifndef STOOPID_8BYTE 339 if (RTA_PAYLOAD(tb[TCA_POLICE_TBF]) < sizeof(*p)) { 340 fprintf(f, "[truncated police tbf]"); 341 return -1; 342 } 343 #endif 344 p = RTA_DATA(tb[TCA_POLICE_TBF]); 345 346 fprintf(f, " police 0x%x ", p->index); 347 fprintf(f, "rate %s ", sprint_rate(p->rate.rate, b1)); 348 buffer = tc_calc_xmitsize(p->rate.rate, p->burst); 349 fprintf(f, "burst %s ", sprint_size(buffer, b1)); 350 fprintf(f, "mtu %s ", sprint_size(p->mtu, b1)); 351 if (show_raw) 352 fprintf(f, "[%08x] ", p->burst); 353 if (p->peakrate.rate) 354 fprintf(f, "peakrate %s ", sprint_rate(p->peakrate.rate, b1)); 355 if (tb[TCA_POLICE_AVRATE]) 356 fprintf(f, "avrate %s ", sprint_rate(rta_getattr_u32(tb[TCA_POLICE_AVRATE]), b1)); 357 fprintf(f, "action %s", police_action_n2a(p->action, b1, sizeof(b1))); 358 if (tb[TCA_POLICE_RESULT]) { 359 fprintf(f, "/%s ", police_action_n2a(*(int*)RTA_DATA(tb[TCA_POLICE_RESULT]), b1, sizeof(b1))); 360 } else 361 fprintf(f, " "); 362 fprintf(f, "overhead %ub ", p->rate.overhead); 363 linklayer = (p->rate.linklayer & TC_LINKLAYER_MASK); 364 if (linklayer > TC_LINKLAYER_ETHERNET || show_details) 365 fprintf(f, "linklayer %s ", sprint_linklayer(linklayer, b2)); 366 fprintf(f, "\nref %d bind %d\n",p->refcnt, p->bindcnt); 367 368 return 0; 369 } 370 371 int 372 tc_print_police(FILE *f, struct rtattr *arg) { 373 return print_police(&police_action_util,f,arg); 374 } 375
