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> 10 * FIXES: 19990619 - J Hadi Salim (hadi@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 29struct action_util police_action_util = { 30 .id = "police", 31 .parse_aopt = act_parse_police, 32 .print_aopt = print_police, 33}; 34 35static void explain(void) 36{ 37 fprintf(stderr, "Usage: ... police rate BPS burst BYTES[/BYTES] [ mtu BYTES[/BYTES] ]\n"); 38 fprintf(stderr, " [ peakrate BPS ] [ avrate BPS ]\n"); 39 fprintf(stderr, " [ ACTIONTERM ]\n"); 40 fprintf(stderr, "Old Syntax ACTIONTERM := action <EXCEEDACT>[/NOTEXCEEDACT] \n"); 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} 45 46static void explain1(char *arg) 47{ 48 fprintf(stderr, "Illegal \"%s\"\n", arg); 49} 50 51#define usage() return(-1) 52 53 54char *police_action_n2a(int action, char *buf, int len) 55{ 56 switch (action) { 57 case -1: 58 return "continue"; 59 break; 60 case TC_POLICE_OK: 61 return "pass"; 62 break; 63 case TC_POLICE_SHOT: 64 return "drop"; 65 break; 66 case TC_POLICE_RECLASSIFY: 67 return "reclassify"; 68 case TC_POLICE_PIPE: 69 return "pipe"; 70 default: 71 snprintf(buf, len, "%d", action); 72 return buf; 73 } 74} 75 76int police_action_a2n(char *arg, int *result) 77{ 78 int res; 79 80 if (matches(arg, "continue") == 0) 81 res = -1; 82 else if (matches(arg, "drop") == 0) 83 res = TC_POLICE_SHOT; 84 else if (matches(arg, "shot") == 0) 85 res = TC_POLICE_SHOT; 86 else if (matches(arg, "pass") == 0) 87 res = TC_POLICE_OK; 88 else if (strcmp(arg, "ok") == 0) 89 res = TC_POLICE_OK; 90 else if (matches(arg, "reclassify") == 0) 91 res = TC_POLICE_RECLASSIFY; 92 else if (matches(arg, "pipe") == 0) 93 res = TC_POLICE_PIPE; 94 else { 95 char dummy; 96 if (sscanf(arg, "%d%c", &res, &dummy) != 1) 97 return -1; 98 } 99 *result = res; 100 return 0; 101} 102 103 104int get_police_result(int *action, int *result, char *arg) 105{ 106 char *p = strchr(arg, '/'); 107 108 if (p) 109 *p = 0; 110 111 if (police_action_a2n(arg, action)) { 112 if (p) 113 *p = '/'; 114 return -1; 115 } 116 117 if (p) { 118 *p = '/'; 119 if (police_action_a2n(p+1, result)) 120 return -1; 121 } 122 return 0; 123} 124 125 126int act_parse_police(struct action_util *a,int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n) 127{ 128 int argc = *argc_p; 129 char **argv = *argv_p; 130 int res = -1; 131 int ok=0; 132 struct tc_police p; 133 __u32 rtab[256]; 134 __u32 ptab[256]; 135 __u32 avrate = 0; 136 int presult = 0; 137 unsigned buffer=0, mtu=0, mpu=0; 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 (strcmp(*argv, "help") == 0) { 239 explain(); 240 return -1; 241 } else { 242 break; 243 } 244 ok++; 245 argc--; argv++; 246 } 247 248 if (!ok) 249 return -1; 250 251 if (p.rate.rate && !buffer) { 252 fprintf(stderr, "\"burst\" requires \"rate\".\n"); 253 return -1; 254 } 255 if (p.peakrate.rate) { 256 if (!p.rate.rate) { 257 fprintf(stderr, "\"peakrate\" requires \"rate\".\n"); 258 return -1; 259 } 260 if (!mtu) { 261 fprintf(stderr, "\"mtu\" is required, if \"peakrate\" is requested.\n"); 262 return -1; 263 } 264 } 265 266 if (p.rate.rate) { 267 if ((Rcell_log = tc_calc_rtable(p.rate.rate, rtab, Rcell_log, mtu, mpu)) < 0) { 268 fprintf(stderr, "TBF: failed to calculate rate table.\n"); 269 return -1; 270 } 271 p.burst = tc_calc_xmittime(p.rate.rate, buffer); 272 p.rate.cell_log = Rcell_log; 273 p.rate.mpu = mpu; 274 } 275 p.mtu = mtu; 276 if (p.peakrate.rate) { 277 if ((Pcell_log = tc_calc_rtable(p.peakrate.rate, ptab, Pcell_log, mtu, mpu)) < 0) { 278 fprintf(stderr, "POLICE: failed to calculate peak rate table.\n"); 279 return -1; 280 } 281 p.peakrate.cell_log = Pcell_log; 282 p.peakrate.mpu = mpu; 283 } 284 285 tail = NLMSG_TAIL(n); 286 addattr_l(n, MAX_MSG, tca_id, NULL, 0); 287 addattr_l(n, MAX_MSG, TCA_POLICE_TBF, &p, sizeof(p)); 288 if (p.rate.rate) 289 addattr_l(n, MAX_MSG, TCA_POLICE_RATE, rtab, 1024); 290 if (p.peakrate.rate) 291 addattr_l(n, MAX_MSG, TCA_POLICE_PEAKRATE, ptab, 1024); 292 if (avrate) 293 addattr32(n, MAX_MSG, TCA_POLICE_AVRATE, avrate); 294 if (presult) 295 addattr32(n, MAX_MSG, TCA_POLICE_RESULT, presult); 296 297 tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; 298 res = 0; 299 300 *argc_p = argc; 301 *argv_p = argv; 302 return res; 303} 304 305int parse_police(int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n) 306{ 307 return act_parse_police(NULL,argc_p,argv_p,tca_id,n); 308} 309 310int 311print_police(struct action_util *a, FILE *f, struct rtattr *arg) 312{ 313 SPRINT_BUF(b1); 314 struct tc_police *p; 315 struct rtattr *tb[TCA_POLICE_MAX+1]; 316 unsigned buffer; 317 318 if (arg == NULL) 319 return 0; 320 321 parse_rtattr_nested(tb, TCA_POLICE_MAX, arg); 322 323 if (tb[TCA_POLICE_TBF] == NULL) { 324 fprintf(f, "[NULL police tbf]"); 325 return 0; 326 } 327#ifndef STOOPID_8BYTE 328 if (RTA_PAYLOAD(tb[TCA_POLICE_TBF]) < sizeof(*p)) { 329 fprintf(f, "[truncated police tbf]"); 330 return -1; 331 } 332#endif 333 p = RTA_DATA(tb[TCA_POLICE_TBF]); 334 335 fprintf(f, " police 0x%x ", p->index); 336 fprintf(f, "rate %s ", sprint_rate(p->rate.rate, b1)); 337 buffer = ((double)p->rate.rate*tc_core_tick2usec(p->burst))/1000000; 338 fprintf(f, "burst %s ", sprint_size(buffer, b1)); 339 fprintf(f, "mtu %s ", sprint_size(p->mtu, b1)); 340 if (show_raw) 341 fprintf(f, "[%08x] ", p->burst); 342 if (p->peakrate.rate) 343 fprintf(f, "peakrate %s ", sprint_rate(p->peakrate.rate, b1)); 344 if (tb[TCA_POLICE_AVRATE]) 345 fprintf(f, "avrate %s ", sprint_rate(*(__u32*)RTA_DATA(tb[TCA_POLICE_AVRATE]), b1)); 346 fprintf(f, "action %s", police_action_n2a(p->action, b1, sizeof(b1))); 347 if (tb[TCA_POLICE_RESULT]) { 348 fprintf(f, "/%s ", police_action_n2a(*(int*)RTA_DATA(tb[TCA_POLICE_RESULT]), b1, sizeof(b1))); 349 } else 350 fprintf(f, " "); 351 fprintf(f, "\nref %d bind %d\n",p->refcnt, p->bindcnt); 352 353 return 0; 354} 355 356int 357tc_print_police(FILE *f, struct rtattr *arg) { 358 return print_police(&police_action_util,f,arg); 359} 360