1 2 /* 3 * main.c 4 * 5 * Copyright (c) 1996-1999 Whistle Communications, Inc. 6 * All rights reserved. 7 * 8 * Subject to the following obligations and disclaimer of warranty, use and 9 * redistribution of this software, in source or object code forms, with or 10 * without modifications are expressly permitted by Whistle Communications; 11 * provided, however, that: 12 * 1. Any and all reproductions of the source or object code must include the 13 * copyright notice above and the following disclaimer of warranties; and 14 * 2. No rights are granted, in any manner or form, to use Whistle 15 * Communications, Inc. trademarks, including the mark "WHISTLE 16 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as 17 * such appears in the above copyright notice or in the software. 18 * 19 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 20 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 21 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 22 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 24 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 25 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 26 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 27 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 28 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 29 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 30 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 31 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 34 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 35 * OF SUCH DAMAGE. 36 * 37 * $FreeBSD: src/usr.sbin/ngctl/main.c,v 1.4.2.4 2002/02/01 18:17:43 archie Exp $ 38 * $DragonFly: src/usr.sbin/ngctl/main.c,v 1.2 2003/06/17 04:29:57 dillon Exp $ 39 * $Whistle: main.c,v 1.12 1999/11/29 19:17:46 archie Exp $ 40 */ 41 42 #include "ngctl.h" 43 44 #define PROMPT "+ " 45 #define MAX_ARGS 512 46 #define WHITESPACE " \t\r\n\v\f" 47 #define DUMP_BYTES_PER_LINE 16 48 49 /* Internal functions */ 50 static int ReadFile(FILE *fp); 51 static int DoParseCommand(char *line); 52 static int DoCommand(int ac, char **av); 53 static int DoInteractive(void); 54 static const struct ngcmd *FindCommand(const char *string); 55 static int MatchCommand(const struct ngcmd *cmd, const char *s); 56 static void Usage(const char *msg); 57 static int ReadCmd(int ac, char **av); 58 static int HelpCmd(int ac, char **av); 59 static int QuitCmd(int ac, char **av); 60 61 /* List of commands */ 62 static const struct ngcmd *const cmds[] = { 63 &config_cmd, 64 &connect_cmd, 65 &debug_cmd, 66 &help_cmd, 67 &list_cmd, 68 &mkpeer_cmd, 69 &msg_cmd, 70 &name_cmd, 71 &read_cmd, 72 &rmhook_cmd, 73 &show_cmd, 74 &shutdown_cmd, 75 &status_cmd, 76 &types_cmd, 77 &write_cmd, 78 &quit_cmd, 79 NULL 80 }; 81 82 /* Commands defined in this file */ 83 const struct ngcmd read_cmd = { 84 ReadCmd, 85 "read <filename>", 86 "Read and execute commands from a file", 87 NULL, 88 { "source", "." } 89 }; 90 const struct ngcmd help_cmd = { 91 HelpCmd, 92 "help [command]", 93 "Show command summary or get more help on a specific command", 94 NULL, 95 { "?" } 96 }; 97 const struct ngcmd quit_cmd = { 98 QuitCmd, 99 "quit", 100 "Exit program", 101 NULL, 102 { "exit" } 103 }; 104 105 /* Our control and data sockets */ 106 int csock, dsock; 107 108 /* 109 * main() 110 */ 111 int 112 main(int ac, char *av[]) 113 { 114 char name[NG_NODELEN + 1]; 115 int interactive = isatty(0) && isatty(1); 116 FILE *fp = NULL; 117 int ch, rtn = 0; 118 119 /* Set default node name */ 120 snprintf(name, sizeof(name), "ngctl%d", getpid()); 121 122 /* Parse command line */ 123 while ((ch = getopt(ac, av, "df:n:")) != EOF) { 124 switch (ch) { 125 case 'd': 126 NgSetDebug(NgSetDebug(-1) + 1); 127 break; 128 case 'f': 129 if (strcmp(optarg, "-") == 0) 130 fp = stdin; 131 else if ((fp = fopen(optarg, "r")) == NULL) 132 err(EX_NOINPUT, "%s", optarg); 133 break; 134 case 'n': 135 snprintf(name, sizeof(name), "%s", optarg); 136 break; 137 case '?': 138 default: 139 Usage((char *)NULL); 140 break; 141 } 142 } 143 ac -= optind; 144 av += optind; 145 146 /* Create a new socket node */ 147 if (NgMkSockNode(name, &csock, &dsock) < 0) 148 err(EX_OSERR, "can't create node"); 149 150 /* Do commands as requested */ 151 if (ac == 0) { 152 if (fp != NULL) { 153 rtn = ReadFile(fp); 154 } else if (interactive) { 155 rtn = DoInteractive(); 156 } else 157 Usage("no command specified"); 158 } else { 159 rtn = DoCommand(ac, av); 160 } 161 162 /* Convert command return code into system exit code */ 163 switch (rtn) { 164 case CMDRTN_OK: 165 case CMDRTN_QUIT: 166 rtn = 0; 167 break; 168 case CMDRTN_USAGE: 169 rtn = EX_USAGE; 170 break; 171 case CMDRTN_ERROR: 172 rtn = EX_OSERR; 173 break; 174 } 175 return(rtn); 176 } 177 178 /* 179 * Process commands from a file 180 */ 181 static int 182 ReadFile(FILE *fp) 183 { 184 char line[LINE_MAX]; 185 int num, rtn; 186 187 for (num = 1; fgets(line, sizeof(line), fp) != NULL; num++) { 188 if (*line == '#') 189 continue; 190 if ((rtn = DoParseCommand(line)) != 0) { 191 warnx("line %d: error in file", num); 192 return(rtn); 193 } 194 } 195 return(CMDRTN_OK); 196 } 197 198 /* 199 * Interactive mode 200 */ 201 static int 202 DoInteractive(void) 203 { 204 const int maxfd = MAX(csock, dsock) + 1; 205 206 (*help_cmd.func)(0, NULL); 207 while (1) { 208 struct timeval tv; 209 fd_set rfds; 210 211 /* See if any data or control messages are arriving */ 212 FD_ZERO(&rfds); 213 FD_SET(csock, &rfds); 214 FD_SET(dsock, &rfds); 215 memset(&tv, 0, sizeof(tv)); 216 if (select(maxfd, &rfds, NULL, NULL, &tv) <= 0) { 217 218 /* Issue prompt and wait for anything to happen */ 219 printf("%s", PROMPT); 220 fflush(stdout); 221 FD_ZERO(&rfds); 222 FD_SET(0, &rfds); 223 FD_SET(csock, &rfds); 224 FD_SET(dsock, &rfds); 225 if (select(maxfd, &rfds, NULL, NULL, NULL) < 0) 226 err(EX_OSERR, "select"); 227 228 /* If not user input, print a newline first */ 229 if (!FD_ISSET(0, &rfds)) 230 printf("\n"); 231 } 232 233 /* Display any incoming control message */ 234 if (FD_ISSET(csock, &rfds)) 235 MsgRead(); 236 237 /* Display any incoming data packet */ 238 if (FD_ISSET(dsock, &rfds)) { 239 u_char buf[8192]; 240 char hook[NG_HOOKLEN + 1]; 241 int rl; 242 243 /* Read packet from socket */ 244 if ((rl = NgRecvData(dsock, 245 buf, sizeof(buf), hook)) < 0) 246 err(EX_OSERR, "reading hook \"%s\"", hook); 247 if (rl == 0) 248 errx(EX_OSERR, "EOF from hook \"%s\"?", hook); 249 250 /* Write packet to stdout */ 251 printf("Rec'd data packet on hook \"%s\":\n", hook); 252 DumpAscii(buf, rl); 253 } 254 255 /* Get any user input */ 256 if (FD_ISSET(0, &rfds)) { 257 char buf[LINE_MAX]; 258 259 if (fgets(buf, sizeof(buf), stdin) == NULL) { 260 printf("\n"); 261 break; 262 } 263 if (DoParseCommand(buf) == CMDRTN_QUIT) 264 break; 265 } 266 } 267 return(CMDRTN_QUIT); 268 } 269 270 /* 271 * Parse a command line and execute the command 272 */ 273 static int 274 DoParseCommand(char *line) 275 { 276 char *av[MAX_ARGS]; 277 int ac; 278 279 /* Parse line */ 280 for (ac = 0, av[0] = strtok(line, WHITESPACE); 281 ac < MAX_ARGS - 1 && av[ac]; 282 av[++ac] = strtok(NULL, WHITESPACE)); 283 284 /* Do command */ 285 return(DoCommand(ac, av)); 286 } 287 288 /* 289 * Execute the command 290 */ 291 static int 292 DoCommand(int ac, char **av) 293 { 294 const struct ngcmd *cmd; 295 int rtn; 296 297 if (ac == 0 || *av[0] == 0) 298 return(CMDRTN_OK); 299 if ((cmd = FindCommand(av[0])) == NULL) 300 return(CMDRTN_ERROR); 301 if ((rtn = (*cmd->func)(ac, av)) == CMDRTN_USAGE) 302 warnx("usage: %s", cmd->cmd); 303 return(rtn); 304 } 305 306 /* 307 * Find a command 308 */ 309 static const struct ngcmd * 310 FindCommand(const char *string) 311 { 312 int k, found = -1; 313 314 for (k = 0; cmds[k] != NULL; k++) { 315 if (MatchCommand(cmds[k], string)) { 316 if (found != -1) { 317 warnx("\"%s\": ambiguous command", string); 318 return(NULL); 319 } 320 found = k; 321 } 322 } 323 if (found == -1) { 324 warnx("\"%s\": unknown command", string); 325 return(NULL); 326 } 327 return(cmds[found]); 328 } 329 330 /* 331 * See if string matches a prefix of "cmd" (or an alias) case insensitively 332 */ 333 static int 334 MatchCommand(const struct ngcmd *cmd, const char *s) 335 { 336 int a; 337 338 /* Try to match command, ignoring the usage stuff */ 339 if (strlen(s) <= strcspn(cmd->cmd, WHITESPACE)) { 340 if (strncasecmp(s, cmd->cmd, strlen(s)) == 0) 341 return (1); 342 } 343 344 /* Try to match aliases */ 345 for (a = 0; a < MAX_CMD_ALIAS && cmd->aliases[a] != NULL; a++) { 346 if (strlen(cmd->aliases[a]) >= strlen(s)) { 347 if (strncasecmp(s, cmd->aliases[a], strlen(s)) == 0) 348 return (1); 349 } 350 } 351 352 /* No match */ 353 return (0); 354 } 355 356 /* 357 * ReadCmd() 358 */ 359 static int 360 ReadCmd(int ac, char **av) 361 { 362 FILE *fp; 363 int rtn; 364 365 /* Open file */ 366 switch (ac) { 367 case 2: 368 if ((fp = fopen(av[1], "r")) == NULL) { 369 warn("%s", av[1]); 370 return(CMDRTN_ERROR); 371 } 372 break; 373 default: 374 return(CMDRTN_USAGE); 375 } 376 377 /* Process it */ 378 rtn = ReadFile(fp); 379 fclose(fp); 380 return(rtn); 381 } 382 383 /* 384 * HelpCmd() 385 */ 386 static int 387 HelpCmd(int ac, char **av) 388 { 389 const struct ngcmd *cmd; 390 int k; 391 392 switch (ac) { 393 case 0: 394 case 1: 395 /* Show all commands */ 396 printf("Available commands:\n"); 397 for (k = 0; cmds[k] != NULL; k++) { 398 char *s, buf[100]; 399 400 cmd = cmds[k]; 401 snprintf(buf, sizeof(buf), "%s", cmd->cmd); 402 for (s = buf; *s != '\0' && !isspace(*s); s++); 403 *s = '\0'; 404 printf(" %-10s %s\n", buf, cmd->desc); 405 } 406 return(CMDRTN_OK); 407 default: 408 /* Show help on a specific command */ 409 if ((cmd = FindCommand(av[1])) != NULL) { 410 printf("Usage: %s\n", cmd->cmd); 411 if (cmd->aliases[0] != NULL) { 412 int a = 0; 413 414 printf("Aliases: "); 415 while (1) { 416 printf("%s", cmd->aliases[a++]); 417 if (a == MAX_CMD_ALIAS 418 || cmd->aliases[a] == NULL) { 419 printf("\n"); 420 break; 421 } 422 printf(", "); 423 } 424 } 425 printf("Summary: %s\n", cmd->desc); 426 if (cmd->help != NULL) { 427 const char *s; 428 char buf[65]; 429 int tot, len, done; 430 431 printf("Description:\n"); 432 for (s = cmd->help; *s != '\0'; s += len) { 433 while (isspace(*s)) 434 s++; 435 tot = snprintf(buf, 436 sizeof(buf), "%s", s); 437 len = strlen(buf); 438 done = len == tot; 439 if (!done) { 440 while (len > 0 441 && !isspace(buf[len-1])) 442 buf[--len] = '\0'; 443 } 444 printf(" %s\n", buf); 445 } 446 } 447 } 448 } 449 return(CMDRTN_OK); 450 } 451 452 /* 453 * QuitCmd() 454 */ 455 static int 456 QuitCmd(int ac, char **av) 457 { 458 return(CMDRTN_QUIT); 459 } 460 461 /* 462 * Dump data in hex and ASCII form 463 */ 464 void 465 DumpAscii(const u_char *buf, int len) 466 { 467 char ch, sbuf[100]; 468 int k, count; 469 470 for (count = 0; count < len; count += DUMP_BYTES_PER_LINE) { 471 snprintf(sbuf, sizeof(sbuf), "%04x: ", count); 472 for (k = 0; k < DUMP_BYTES_PER_LINE; k++) { 473 if (count + k < len) { 474 snprintf(sbuf + strlen(sbuf), 475 sizeof(sbuf) - strlen(sbuf), 476 "%02x ", buf[count + k]); 477 } else { 478 snprintf(sbuf + strlen(sbuf), 479 sizeof(sbuf) - strlen(sbuf), " "); 480 } 481 } 482 snprintf(sbuf + strlen(sbuf), sizeof(sbuf) - strlen(sbuf), " "); 483 for (k = 0; k < DUMP_BYTES_PER_LINE; k++) { 484 if (count + k < len) { 485 ch = isprint(buf[count + k]) ? 486 buf[count + k] : '.'; 487 snprintf(sbuf + strlen(sbuf), 488 sizeof(sbuf) - strlen(sbuf), "%c", ch); 489 } else { 490 snprintf(sbuf + strlen(sbuf), 491 sizeof(sbuf) - strlen(sbuf), " "); 492 } 493 } 494 printf("%s\n", sbuf); 495 } 496 } 497 498 /* 499 * Usage() 500 */ 501 static void 502 Usage(const char *msg) 503 { 504 if (msg) 505 warnx("%s", msg); 506 errx(EX_USAGE, "usage: ngctl [-d] [-f file] [-n name] [command ...]"); 507 } 508 509