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