1 /*- 2 * Copyright (c) 1997 Brian Somers <brian@Awfulhak.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/usr.sbin/pppctl/pppctl.c,v 1.21.2.2 2001/11/23 13:18:39 brian Exp $ 27 */ 28 29 #include <sys/param.h> 30 31 #include <sys/socket.h> 32 #include <netinet/in.h> 33 #include <arpa/inet.h> 34 #include <sys/un.h> 35 #include <netdb.h> 36 37 #include <sys/time.h> 38 #include <err.h> 39 #include <errno.h> 40 #include <histedit.h> 41 #include <setjmp.h> 42 #include <signal.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <time.h> 47 #include <unistd.h> 48 49 #define LINELEN 2048 50 static char Buffer[LINELEN], Command[LINELEN]; 51 52 static int 53 usage(void) 54 { 55 fprintf(stderr, "usage: pppctl [-v] [-t n] [-p passwd] " 56 "Port|LocalSock [command[;command]...]\n"); 57 fprintf(stderr, " -v tells pppctl to output all" 58 " conversation\n"); 59 fprintf(stderr, " -t n specifies a timeout of n" 60 " seconds when connecting (default 2)\n"); 61 fprintf(stderr, " -p passwd specifies your password\n"); 62 exit(1); 63 } 64 65 static int TimedOut = 0; 66 static void 67 Timeout(int Sig) 68 { 69 TimedOut = 1; 70 } 71 72 #define REC_PASSWD (1) 73 #define REC_SHOW (2) 74 #define REC_VERBOSE (4) 75 76 static char *passwd; 77 static char *prompt; 78 79 static char * 80 GetPrompt(EditLine *e) 81 { 82 if (prompt == NULL) 83 prompt = ""; 84 return prompt; 85 } 86 87 static int 88 Receive(int fd, int display) 89 { 90 int Result; 91 int len; 92 char *last; 93 94 prompt = Buffer; 95 len = 0; 96 while (Result = read(fd, Buffer+len, sizeof(Buffer)-len-1), Result != -1) { 97 if (Result == 0 && errno != EINTR) { 98 Result = -1; 99 break; 100 } 101 len += Result; 102 Buffer[len] = '\0'; 103 if (len > 2 && !strcmp(Buffer+len-2, "> ")) { 104 prompt = strrchr(Buffer, '\n'); 105 if (display & (REC_SHOW|REC_VERBOSE)) { 106 if (display & REC_VERBOSE) 107 last = Buffer+len-1; 108 else 109 last = prompt; 110 if (last) { 111 last++; 112 write(1, Buffer, last-Buffer); 113 } 114 } 115 prompt = prompt == NULL ? Buffer : prompt+1; 116 for (last = Buffer+len-2; last > Buffer && *last != ' '; last--) 117 ; 118 if (last > Buffer+3 && !strncmp(last-3, " on", 3)) { 119 /* a password is required ! */ 120 if (display & REC_PASSWD) { 121 /* password time */ 122 if (!passwd) 123 passwd = getpass("Password: "); 124 sprintf(Buffer, "passwd %s\n", passwd); 125 memset(passwd, '\0', strlen(passwd)); 126 if (display & REC_VERBOSE) 127 write(1, Buffer, strlen(Buffer)); 128 write(fd, Buffer, strlen(Buffer)); 129 memset(Buffer, '\0', strlen(Buffer)); 130 return Receive(fd, display & ~REC_PASSWD); 131 } 132 Result = 1; 133 } else 134 Result = 0; 135 break; 136 } 137 if (len == sizeof Buffer - 1) { 138 int flush; 139 if ((last = strrchr(Buffer, '\n')) == NULL) 140 /* Yeuch - this is one mother of a line ! */ 141 flush = sizeof Buffer / 2; 142 else 143 flush = last - Buffer + 1; 144 write(1, Buffer, flush); 145 strcpy(Buffer, Buffer + flush); 146 len -= flush; 147 } 148 } 149 150 return Result; 151 } 152 153 static int data = -1; 154 static jmp_buf pppdead; 155 156 static void 157 check_fd(int sig) 158 { 159 if (data != -1) { 160 struct timeval t; 161 fd_set f; 162 static char buf[LINELEN]; 163 int len; 164 165 FD_ZERO(&f); 166 FD_SET(data, &f); 167 t.tv_sec = t.tv_usec = 0; 168 if (select(data+1, &f, NULL, NULL, &t) > 0) { 169 len = read(data, buf, sizeof buf); 170 if (len > 0) 171 write(1, buf, len); 172 else 173 longjmp(pppdead, -1); 174 } 175 } 176 } 177 178 static const char * 179 smartgets(EditLine *e, int *count, int fd) 180 { 181 const char *result; 182 183 data = fd; 184 signal(SIGALRM, check_fd); 185 ualarm(500000, 500000); 186 result = setjmp(pppdead) ? NULL : el_gets(e, count); 187 ualarm(0,0); 188 signal(SIGALRM, SIG_DFL); 189 data = -1; 190 191 return result; 192 } 193 194 int 195 main(int argc, char **argv) 196 { 197 struct servent *s; 198 struct hostent *h; 199 struct sockaddr *sock; 200 struct sockaddr_in ifsin; 201 struct sockaddr_un ifsun; 202 int n, socksz, arg, fd, len, verbose, save_errno, hide1, hide1off, hide2; 203 unsigned TimeoutVal; 204 char *DoneWord = "x", *next, *start; 205 struct sigaction act, oact; 206 207 verbose = 0; 208 TimeoutVal = 2; 209 hide1 = hide1off = hide2 = 0; 210 211 for (arg = 1; arg < argc; arg++) 212 if (*argv[arg] == '-') { 213 for (start = argv[arg] + 1; *start; start++) 214 switch (*start) { 215 case 't': 216 TimeoutVal = (unsigned)atoi 217 (start[1] ? start + 1 : argv[++arg]); 218 start = DoneWord; 219 break; 220 221 case 'v': 222 verbose = REC_VERBOSE; 223 break; 224 225 case 'p': 226 if (start[1]) { 227 hide1 = arg; 228 hide1off = start - argv[arg]; 229 passwd = start + 1; 230 } else { 231 hide1 = arg; 232 hide1off = start - argv[arg]; 233 passwd = argv[++arg]; 234 hide2 = arg; 235 } 236 start = DoneWord; 237 break; 238 239 default: 240 usage(); 241 } 242 } 243 else 244 break; 245 246 247 if (argc < arg + 1) 248 usage(); 249 250 if (hide1) { 251 char title[1024]; 252 int pos, harg; 253 254 for (harg = pos = 0; harg < argc; harg++) 255 if (harg == 0 || harg != hide2) { 256 if (harg == 0 || harg != hide1) 257 n = snprintf(title + pos, sizeof title - pos, "%s%s", 258 harg ? " " : "", argv[harg]); 259 else if (hide1off > 1) 260 n = snprintf(title + pos, sizeof title - pos, " %.*s", 261 hide1off, argv[harg]); 262 else 263 n = 0; 264 if (n < 0 || n >= sizeof title - pos) 265 break; 266 pos += n; 267 } 268 #ifdef __DragonFly__ 269 setproctitle("-%s", title); 270 #else 271 setproctitle("%s", title); 272 #endif 273 } 274 275 if (*argv[arg] == '/') { 276 sock = (struct sockaddr *)&ifsun; 277 socksz = sizeof ifsun; 278 279 memset(&ifsun, '\0', sizeof ifsun); 280 ifsun.sun_len = strlen(argv[arg]); 281 if (ifsun.sun_len > sizeof ifsun.sun_path - 1) { 282 warnx("%s: path too long", argv[arg]); 283 return 1; 284 } 285 ifsun.sun_family = AF_LOCAL; 286 strcpy(ifsun.sun_path, argv[arg]); 287 288 if (fd = socket(AF_LOCAL, SOCK_STREAM, 0), fd < 0) { 289 warnx("cannot create local domain socket"); 290 return 2; 291 } 292 } else { 293 char *port, *host, *colon; 294 int hlen; 295 296 colon = strchr(argv[arg], ':'); 297 if (colon) { 298 port = colon + 1; 299 *colon = '\0'; 300 host = argv[arg]; 301 } else { 302 port = argv[arg]; 303 host = "127.0.0.1"; 304 } 305 sock = (struct sockaddr *)&ifsin; 306 socksz = sizeof ifsin; 307 hlen = strlen(host); 308 309 memset(&ifsin, '\0', sizeof ifsin); 310 if (strspn(host, "0123456789.") == hlen) { 311 if (!inet_aton(host, &ifsin.sin_addr)) { 312 warnx("cannot translate %s", host); 313 return 1; 314 } 315 } else if ((h = gethostbyname(host)) == NULL) { 316 warnx("cannot resolve %s", host); 317 return 1; 318 } 319 else 320 ifsin.sin_addr.s_addr = *(u_long *)h->h_addr_list[0]; 321 322 if (colon) 323 *colon = ':'; 324 325 if (strspn(port, "0123456789") == strlen(port)) 326 ifsin.sin_port = htons(atoi(port)); 327 else if (s = getservbyname(port, "tcp"), !s) { 328 warnx("%s isn't a valid port or service!", port); 329 usage(); 330 } 331 else 332 ifsin.sin_port = s->s_port; 333 334 ifsin.sin_len = sizeof(ifsin); 335 ifsin.sin_family = AF_INET; 336 337 if (fd = socket(AF_INET, SOCK_STREAM, 0), fd < 0) { 338 warnx("cannot create internet socket"); 339 return 2; 340 } 341 } 342 343 TimedOut = 0; 344 if (TimeoutVal) { 345 act.sa_handler = Timeout; 346 sigemptyset(&act.sa_mask); 347 act.sa_flags = 0; 348 sigaction(SIGALRM, &act, &oact); 349 alarm(TimeoutVal); 350 } 351 352 if (connect(fd, sock, socksz) < 0) { 353 if (TimeoutVal) { 354 save_errno = errno; 355 alarm(0); 356 sigaction(SIGALRM, &oact, 0); 357 errno = save_errno; 358 } 359 if (TimedOut) 360 warnx("timeout: cannot connect to socket %s", argv[arg]); 361 else { 362 if (errno) 363 warn("cannot connect to socket %s", argv[arg]); 364 else 365 warnx("cannot connect to socket %s", argv[arg]); 366 } 367 close(fd); 368 return 3; 369 } 370 371 if (TimeoutVal) { 372 alarm(0); 373 sigaction(SIGALRM, &oact, 0); 374 } 375 376 len = 0; 377 Command[sizeof(Command)-1] = '\0'; 378 for (arg++; arg < argc; arg++) { 379 if (len && len < sizeof(Command)-1) 380 strcpy(Command+len++, " "); 381 strncpy(Command+len, argv[arg], sizeof(Command)-len-1); 382 len += strlen(Command+len); 383 } 384 385 switch (Receive(fd, verbose | REC_PASSWD)) 386 { 387 case 1: 388 fprintf(stderr, "Password incorrect\n"); 389 break; 390 391 case 0: 392 if (len == 0) { 393 EditLine *edit; 394 History *hist; 395 HistEvent he; 396 const char *l, *env; 397 int size; 398 399 hist = history_init(); 400 if ((env = getenv("EL_SIZE"))) { 401 size = atoi(env); 402 if (size < 0) 403 size = 20; 404 } else 405 size = 20; 406 history(hist, &he, H_SETSIZE, size); 407 edit = el_init("pppctl", stdin, stdout, stderr); 408 el_source(edit, NULL); 409 el_set(edit, EL_PROMPT, GetPrompt); 410 if ((env = getenv("EL_EDITOR"))) { 411 if (!strcmp(env, "vi")) 412 el_set(edit, EL_EDITOR, "vi"); 413 else if (!strcmp(env, "emacs")) 414 el_set(edit, EL_EDITOR, "emacs"); 415 } 416 el_set(edit, EL_SIGNAL, 1); 417 el_set(edit, EL_HIST, history, (const char *)hist); 418 while ((l = smartgets(edit, &len, fd))) { 419 if (len > 1) 420 history(hist, &he, H_ENTER, l); 421 write(fd, l, len); 422 if (Receive(fd, REC_SHOW) != 0) 423 break; 424 } 425 fprintf(stderr, "Connection closed\n"); 426 el_end(edit); 427 history_end(hist); 428 } else { 429 start = Command; 430 do { 431 next = strchr(start, ';'); 432 while (*start == ' ' || *start == '\t') 433 start++; 434 if (next) 435 *next = '\0'; 436 strcpy(Buffer, start); 437 Buffer[sizeof(Buffer)-2] = '\0'; 438 strcat(Buffer, "\n"); 439 if (verbose) 440 write(1, Buffer, strlen(Buffer)); 441 write(fd, Buffer, strlen(Buffer)); 442 if (Receive(fd, verbose | REC_SHOW) != 0) { 443 fprintf(stderr, "Connection closed\n"); 444 break; 445 } 446 if (next) 447 start = ++next; 448 } while (next && *next); 449 if (verbose) 450 puts(""); 451 } 452 break; 453 454 default: 455 warnx("ppp is not responding"); 456 break; 457 } 458 459 close(fd); 460 461 return 0; 462 } 463