1 /* $NetBSD: quip_client.c,v 1.8 2005/05/20 18:01:46 kleink Exp $ */ 2 /* $KAME: quip_client.c,v 1.7 2001/12/28 00:50:28 itojun Exp $ */ 3 /* 4 * Copyright (C) 1999-2000 5 * Sony Computer Science Laboratories, Inc. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/param.h> 30 #include <sys/socket.h> 31 #include <sys/time.h> 32 #include <sys/un.h> 33 34 #include <stdio.h> 35 #include <stdlib.h> 36 #include <unistd.h> 37 #include <string.h> 38 #include <errno.h> 39 #include <err.h> 40 41 #include "quip_client.h" 42 #include "altqstat.h" 43 44 /* 45 * quip (queue information protocol) is a http-like protocol 46 * in order to retrieve information from the server. 47 * a unix domain TCP socket "/var/run/altq_quip" is used for 48 * client-server style communication. 49 * 50 * there are 2 quip message types: request and response. 51 * request format: (only single-line request message is used at this moment) 52 * request-line 53 * 54 * request-line = <method> <operation>[?<query>] <quip-version> 55 * <method> = GET (only GET is defined at this moment) 56 * <operation> = list | handle-to-name | qdisc | filter 57 * query format is operation dependent but most query takes 58 * <interface> or <class> or <filter>. 59 * <interface> = <if_name> 60 * <class> = <if_name>:<class_path>/<class_name> 61 * <filter> = <if_name>:<class_path>/<class_name>:<filter_name> 62 * "list" operation accepts "*" as a wildcard. 63 * 64 * response format: 65 * status-line 66 * response-headers (0 or more) 67 * <blank line> 68 * body 69 * 70 * status-line = <quip-version> <status-code> <reason phrase> 71 * response-header = Content-Length:<value> 72 * 73 * "Content-Length" specifies the length of the message body. 74 * 75 * example: 76 * to retrieve a list of classes (handle and name) on interface "fxp0": 77 * a request message looks like, 78 * GET list?fxp0:* QUIP/1.0<cr> 79 * a response message looks like, 80 * QUIP/1.0 200 OK<cr> 81 * Content-Length:86<cr> 82 * <cr> 83 * 0000000000 fxp0:/root<cr> 84 * 0xc0d1be00 fxp0:/root/parent<cr> 85 * 0xc0d1ba00 fxp0:/root/parent/child<cr> 86 * 87 * other examples: 88 * list all interfaces, classes, and filters: 89 * GET list QUIP/1.0<cr> 90 * list all interfaces: 91 * GET list?* QUIP/1.0<cr> 92 * list all classes: 93 * GET list?*:* QUIP/1.0<cr> 94 * list all filters: 95 * GET list?*:*:* QUIP/1.0<cr> 96 * convert class handle to class name: 97 * GET handle-to-name?fxp0:0xc0d1be00 QUIP/1.0<cr> 98 * convert filter handle to filter name: 99 * GET handle-to-name?fxp0::0x1000000a QUIP/1.0<cr> 100 */ 101 102 #define MAXLINESIZE 1024 103 104 enum nametype { INTERFACE, CLASS, FILTER, CONDITIONER }; 105 106 static FILE *server = NULL; 107 int quip_echo = 0; 108 109 static char *extract_ifname(const char *); 110 111 int 112 quip_openserver(void) 113 { 114 struct sockaddr_un addr; 115 int fd; 116 117 if ((fd = socket(AF_LOCAL, SOCK_STREAM, 0)) < 0) 118 err(1, "can't open socket"); 119 120 bzero(&addr, sizeof(addr)); 121 addr.sun_family = AF_LOCAL; 122 strlcpy(addr.sun_path, QUIP_PATH,sizeof(addr.sun_path)); 123 124 if (connect(fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) { 125 fprintf(stderr, "can't talk to altqd!\n" 126 "probably, altqd is not running\n"); 127 return (-1); 128 } 129 130 if ((server = fdopen(fd, "r+")) == NULL) { 131 warn("fdopen: can't open stream to the quip server"); 132 return (-1); 133 } 134 return (0); 135 } 136 137 int 138 quip_closeserver(void) 139 { 140 if (server != NULL) 141 return fclose(server); 142 return (0); 143 } 144 145 void 146 quip_sendrequest(FILE *fp, const char *request) 147 { 148 char buf[QUIPMSG_MAXSIZE], *cp; 149 int n; 150 151 if ((cp = strstr(request, "QUIP")) == NULL) { 152 cp = strchr(request, '\n'); 153 n = cp - request; 154 if (cp == NULL || n > REQ_MAXSIZE - 10) 155 return; 156 strncpy(buf, request, n); 157 snprintf(buf + n, REQ_MAXSIZE - n, " QUIP/1.0"); 158 strlcat(buf, cp, REQ_MAXSIZE); 159 } 160 else 161 strlcpy(buf, request, REQ_MAXSIZE); 162 163 if (fputs(buf, fp) != 0) 164 err(1, "fputs"); 165 if (fflush(fp) != 0) 166 err(1, "fflush"); 167 if (quip_echo) { 168 fputs("<< ", stdout); 169 fputs(buf, stdout); 170 } 171 } 172 173 /* 174 * recv_response receives a response message from the server 175 * and returns status_code. 176 */ 177 int 178 quip_recvresponse(FILE *fp, char *header, char *body, int *blen) 179 { 180 char buf[MAXLINESIZE], version[MAXLINESIZE]; 181 int code, resid, len, buflen; 182 int end_of_header = 0; 183 184 if (blen != NULL) 185 *blen = 0; 186 code = 0; 187 resid = 0; 188 buflen = RES_MAXSIZE; 189 while (fgets(buf, sizeof(buf), fp) != 0) { 190 if (quip_echo) { 191 fputs("> ", stdout); 192 fputs(buf, stdout); 193 } 194 195 if (!end_of_header) { 196 /* process message header */ 197 if (header != NULL) { 198 len = strlcpy(header, buf, buflen); 199 if (len >= buflen) { 200 /* header too long */ 201 fpurge(fp); 202 return (-1); 203 } 204 header += len; 205 buflen -= len; 206 } 207 208 if (code == 0) { 209 /* status line expected */ 210 if (buf[0] == '\n') { 211 /* ignore blank lines */ 212 } 213 /* sizeof(version) == 1024 */ 214 else if (sscanf(buf, "%1023s %d", 215 version, &code) != 2) { 216 /* can't get result code */ 217 fpurge(fp); 218 return (-1); 219 } 220 } 221 else { 222 /* entity header expected */ 223 char *field, *cp; 224 225 if (buf[0] == '\n') { 226 /* end of header */ 227 end_of_header = 1; 228 buflen = BODY_MAXSIZE; 229 if (resid == 0) 230 /* no message body */ 231 return (code); 232 } 233 234 cp = buf; 235 field = strsep(&cp, ":"); 236 if (strcmp(field, "Content-Length") == 0) { 237 if (sscanf(cp, "%d", &resid) != 1) { 238 fpurge(fp); 239 return (-1); 240 } 241 if (blen != NULL) 242 *blen = resid; 243 } 244 } 245 } 246 else { 247 /* process message body */ 248 if (body != NULL) { 249 len = strlcpy(body, buf, buflen); 250 if (len >= buflen) { 251 /* body too long */ 252 fpurge(fp); 253 return (-1); 254 } 255 body += len; 256 buflen -= len; 257 } 258 else 259 len = strlen(buf); 260 resid -= len; 261 if (resid <= 0) 262 return (code); 263 } 264 } 265 return (-1); 266 } 267 268 void 269 quip_rawmode(void) 270 { 271 char line[MAXLINESIZE]; 272 int result_code; 273 274 printf(">>>Entering the raw interactive mode to the server:\n\n"); 275 if (server == NULL) { 276 printf("No server available!\n"); 277 return; 278 } 279 280 while (1) { 281 printf("%% "); fflush(stdout); 282 /* read a line from stdin */ 283 if (fgets(line, sizeof(line), stdin) == NULL) 284 break; 285 286 if (line[0] == '\n') { 287 /* if a blank line, echo locally */ 288 fputs(line, stdout); 289 continue; 290 } 291 if (line[0] == 'q') { 292 printf("Exit\n"); 293 break; 294 } 295 296 /* send the input line to the server */ 297 quip_sendrequest(server, line); 298 299 /* get a response message from the server */ 300 result_code = quip_recvresponse(server, NULL, NULL, NULL); 301 } 302 } 303 304 char * 305 quip_selectinterface(char *ifname) 306 { 307 char buf[BODY_MAXSIZE], *cp; 308 int result_code, len; 309 u_int if_index; 310 static char interface[64]; 311 312 if (server == NULL) 313 return (ifname); 314 315 /* get an inferface list from the server */ 316 quip_sendrequest(server, "GET list?*\n"); 317 318 result_code = quip_recvresponse(server, NULL, buf, &len); 319 if (result_code != 200) 320 errx(1, "can't get interface list"); 321 322 cp = buf; 323 while (1) { 324 if (sscanf(cp, "%x %63s", &if_index, interface) != 2) 325 break; 326 if (ifname == NULL) { 327 /* if name isn't specified, return the 1st entry */ 328 return (interface); 329 } 330 if (strcmp(ifname, interface) == 0) 331 /* found the matching entry */ 332 return (interface); 333 if ((cp = strchr(cp+1, '\n')) == NULL) 334 break; 335 } 336 errx(1, "can't get interface"); 337 return (NULL); 338 } 339 340 char * 341 quip_selectqdisc(char *ifname, char *qdisc_name) 342 { 343 char buf[BODY_MAXSIZE], req[REQ_MAXSIZE]; 344 int result_code, len; 345 static char qdisc[64]; 346 347 if (server == NULL) { 348 if (ifname == NULL || qdisc_name == NULL) 349 errx(1, "when disabling server communication,\n" 350 "specify both interface (-i) and qdisc (-q)!"); 351 return (qdisc_name); 352 } 353 354 /* get qdisc info from the server */ 355 snprintf(req, sizeof(req), "GET qdisc?%s\n", ifname); 356 quip_sendrequest(server, req); 357 358 result_code = quip_recvresponse(server, NULL, buf, &len); 359 if (result_code != 200) 360 errx(1, "can't get qdisc info"); 361 362 if (sscanf(buf, "%63s", qdisc) != 1) 363 errx(1, "can't get qdisc name"); 364 365 if (qdisc_name != NULL && strcmp(qdisc, qdisc_name) != 0) 366 errx(1, "qdisc %s on %s doesn't match specified qdisc %s", 367 qdisc, ifname, qdisc_name); 368 369 return (qdisc); 370 } 371 372 void 373 quip_chandle2name(const char *ifname, u_long handle, char *name, size_t size) 374 { 375 char buf[BODY_MAXSIZE], req[REQ_MAXSIZE], *cp; 376 int result_code, len; 377 378 name[0] = '\0'; 379 if (server == NULL) 380 return; 381 382 /* get class name from the server */ 383 snprintf(req, sizeof(req), "GET handle-to-name?%s:%#lx\n", ifname, handle); 384 quip_sendrequest(server, req); 385 386 result_code = quip_recvresponse(server, NULL, buf, &len); 387 if (result_code != 200) 388 errx(1, "can't get class name"); 389 390 if ((cp = strchr(buf, '\n')) != NULL) 391 *cp = '\0'; 392 if ((cp = strrchr(buf, '/')) != NULL) 393 strlcpy(name, cp+1, size); 394 } 395 396 void 397 quip_printqdisc(const char *ifname) 398 { 399 char buf[BODY_MAXSIZE], req[REQ_MAXSIZE], *cp; 400 int result_code, len; 401 402 if (server == NULL) { 403 printf("No server available!\n"); 404 return; 405 } 406 407 /* get qdisc info from the server */ 408 snprintf(req, sizeof(req), "GET qdisc?%s\n", ifname); 409 quip_sendrequest(server, req); 410 411 result_code = quip_recvresponse(server, NULL, buf, &len); 412 if (result_code != 200) 413 errx(1, "can't get qdisc info"); 414 415 /* replace newline by space */ 416 cp = buf; 417 while ((cp = strchr(cp, '\n')) != NULL) 418 *cp = ' '; 419 420 printf(" qdisc:%s\n", buf); 421 } 422 423 void 424 quip_printfilter(const char *ifname, const u_long handle) 425 { 426 char buf[BODY_MAXSIZE], req[REQ_MAXSIZE], *cp; 427 int result_code, len; 428 429 /* get qdisc info from the server */ 430 snprintf(req, sizeof(req), "GET filter?%s::%#lx\n", ifname, handle); 431 quip_sendrequest(server, req); 432 433 result_code = quip_recvresponse(server, NULL, buf, &len); 434 if (result_code != 200) 435 errx(1, "can't get filter info"); 436 437 if ((cp = strchr(buf, '\n')) != NULL) 438 *cp = '\0'; 439 printf("%s", buf); 440 } 441 442 static char * 443 extract_ifname(const char *name) 444 { 445 char *cp; 446 int len; 447 static char ifname[64]; 448 449 if ((cp = strchr(name, ':')) != NULL) 450 len = cp - name; 451 else 452 len = strlen(name); 453 len = MIN(len, 63); 454 strncpy(ifname, name, len); 455 ifname[len] = '\0'; 456 return (ifname); 457 } 458 459 void 460 quip_printconfig(void) 461 { 462 char buf[BODY_MAXSIZE], name[256], *cp, *p, *flname; 463 int result_code, len; 464 enum nametype type; 465 u_long handle; 466 467 /* get a total list from the server */ 468 quip_sendrequest(server, "GET list\n"); 469 470 result_code = quip_recvresponse(server, NULL, buf, &len); 471 if (result_code != 200) 472 errx(1, "can't get total list"); 473 474 printf("------------ current configuration ------------"); 475 476 cp = buf; 477 while (1) { 478 if (sscanf(cp, "%lx %255s", &handle, name) != 2) 479 break; 480 481 if ((p = strchr(name, ':')) == NULL) 482 type = INTERFACE; 483 else if (strchr(p+1, ':') == NULL) 484 type = CLASS; 485 else 486 type = FILTER; 487 488 switch (type) { 489 case INTERFACE: 490 printf("\ninterface: %s (index:%lu)\n", 491 name, handle); 492 quip_printqdisc(name); 493 break; 494 case CLASS: 495 printf("class: %s (handle:%#lx)\n", 496 name, handle); 497 break; 498 case FILTER: 499 flname = strrchr(name, ':') + 1; 500 printf(" filter: name:%s [", flname); 501 quip_printfilter(extract_ifname(name), handle); 502 printf("] (handle:%#lx)\n", handle); 503 break; 504 case CONDITIONER: 505 break; 506 } 507 508 if ((cp = strchr(cp+1, '\n')) == NULL) 509 break; 510 } 511 printf("-----------------------------------------------\n\n"); 512 } 513 514