| 1 | /* main.c 4.5 82/12/25 */ |
| 2 | |
| 3 | /* |
| 4 | * TFTP User Program -- Command Interface. |
| 5 | */ |
| 6 | #include <sys/types.h> |
| 7 | #include <sys/socket.h> |
| 8 | |
| 9 | #include <netinet/in.h> |
| 10 | |
| 11 | #include <signal.h> |
| 12 | #include <stdio.h> |
| 13 | #include <errno.h> |
| 14 | #include <setjmp.h> |
| 15 | #include <ctype.h> |
| 16 | #include <netdb.h> |
| 17 | |
| 18 | struct sockaddr_in sin; |
| 19 | int f; |
| 20 | int trace; |
| 21 | int verbose; |
| 22 | int connected; |
| 23 | char mode[32]; |
| 24 | char line[200]; |
| 25 | int margc; |
| 26 | char *margv[20]; |
| 27 | char *prompt = "tftp"; |
| 28 | jmp_buf toplevel; |
| 29 | int intr(); |
| 30 | struct servent *sp; |
| 31 | |
| 32 | int quit(), help(), setverbose(), settrace(), status(); |
| 33 | int get(), put(), setpeer(), setmode(); |
| 34 | |
| 35 | #define HELPINDENT (sizeof("connect")) |
| 36 | |
| 37 | struct cmd { |
| 38 | char *name; |
| 39 | char *help; |
| 40 | int (*handler)(); |
| 41 | }; |
| 42 | |
| 43 | char vhelp[] = "toggle verbose mode"; |
| 44 | char thelp[] = "toggle packet tracing"; |
| 45 | char chelp[] = "connect to remote tftp"; |
| 46 | char qhelp[] = "exit tftp"; |
| 47 | char hhelp[] = "print help information"; |
| 48 | char shelp[] = "send file"; |
| 49 | char rhelp[] = "receive file"; |
| 50 | char mhelp[] = "set file transfer mode"; |
| 51 | char sthelp[] = "show current status"; |
| 52 | |
| 53 | struct cmd cmdtab[] = { |
| 54 | { "connect", chelp, setpeer }, |
| 55 | { "mode", mhelp, setmode }, |
| 56 | { "put", shelp, put }, |
| 57 | { "get", rhelp, get }, |
| 58 | { "quit", qhelp, quit }, |
| 59 | { "verbose", vhelp, setverbose }, |
| 60 | { "trace", thelp, settrace }, |
| 61 | { "status", sthelp, status }, |
| 62 | { "?", hhelp, help }, |
| 63 | 0 |
| 64 | }; |
| 65 | |
| 66 | struct cmd *getcmd(); |
| 67 | char *tail(); |
| 68 | char *index(); |
| 69 | char *rindex(); |
| 70 | |
| 71 | main(argc, argv) |
| 72 | char *argv[]; |
| 73 | { |
| 74 | sp = getservbyname("tftp", "udp"); |
| 75 | if (sp == 0) { |
| 76 | fprintf(stderr, "tftp: udp/tftp: unknown service\n"); |
| 77 | exit(1); |
| 78 | } |
| 79 | f = socket(AF_INET, SOCK_DGRAM, 0, 0); |
| 80 | if (f < 0) { |
| 81 | perror("socket"); |
| 82 | exit(3); |
| 83 | } |
| 84 | strcpy(mode, "netascii"); |
| 85 | if (argc > 1) { |
| 86 | if (setjmp(toplevel) != 0) |
| 87 | exit(0); |
| 88 | setpeer(argc, argv); |
| 89 | } |
| 90 | setjmp(toplevel); |
| 91 | for (;;) |
| 92 | command(1); |
| 93 | } |
| 94 | |
| 95 | char *hostname; |
| 96 | char hnamebuf[32]; |
| 97 | |
| 98 | setpeer(argc, argv) |
| 99 | int argc; |
| 100 | char *argv[]; |
| 101 | { |
| 102 | register int c; |
| 103 | struct hostent *host; |
| 104 | |
| 105 | if (argc < 2) { |
| 106 | strcpy(line, "Connect "); |
| 107 | printf("(to) "); |
| 108 | gets(&line[strlen(line)]); |
| 109 | makeargv(); |
| 110 | argc = margc; |
| 111 | argv = margv; |
| 112 | } |
| 113 | if (argc > 3) { |
| 114 | printf("usage: %s host-name [port]\n", argv[0]); |
| 115 | return; |
| 116 | } |
| 117 | host = gethostbyname(argv[1]); |
| 118 | if (host) { |
| 119 | sin.sin_family = host->h_addrtype; |
| 120 | bcopy(host->h_addr, &sin.sin_addr, host->h_length); |
| 121 | hostname = host->h_name; |
| 122 | } else { |
| 123 | sin.sin_family = AF_INET; |
| 124 | sin.sin_addr.s_addr = inet_addr(argv[1]); |
| 125 | if (sin.sin_addr.s_addr == -1) { |
| 126 | connected = 0; |
| 127 | printf("%s: unknown host\n", argv[1]); |
| 128 | return; |
| 129 | } |
| 130 | strcpy(hnamebuf, argv[1]); |
| 131 | hostname = hnamebuf; |
| 132 | } |
| 133 | sin.sin_port = sp->s_port; |
| 134 | if (argc == 3) { |
| 135 | sin.sin_port = atoi(argv[2]); |
| 136 | if (sin.sin_port < 0) { |
| 137 | printf("%s: bad port number\n", argv[2]); |
| 138 | connected = 0; |
| 139 | return; |
| 140 | } |
| 141 | sin.sin_port = htons((u_short)sin.sin_port); |
| 142 | } |
| 143 | connected = 1; |
| 144 | } |
| 145 | |
| 146 | struct modes { |
| 147 | char *m_name; |
| 148 | char *m_mode; |
| 149 | } modes[] = { |
| 150 | { "ascii", "netascii" }, |
| 151 | { "binary", "octect" }, |
| 152 | { "mail", "mail" }, |
| 153 | { 0, 0 } |
| 154 | }; |
| 155 | |
| 156 | setmode(argc, argv) |
| 157 | char *argv[]; |
| 158 | { |
| 159 | register struct modes *p; |
| 160 | |
| 161 | if (argc > 2) { |
| 162 | char *sep; |
| 163 | |
| 164 | printf("usage: %s [", argv[0]); |
| 165 | sep = " "; |
| 166 | for (p = modes; p->m_name; p++) { |
| 167 | printf("%s%s", sep, p->m_name); |
| 168 | if (*sep == ' ') |
| 169 | sep = " | "; |
| 170 | } |
| 171 | printf(" ]\n"); |
| 172 | return; |
| 173 | } |
| 174 | if (argc < 2) { |
| 175 | printf("Using %s mode to transfer files.\n", mode); |
| 176 | return; |
| 177 | } |
| 178 | for (p = modes; p->m_name; p++) |
| 179 | if (strcmp(argv[1], p->m_name) == 0) |
| 180 | break; |
| 181 | if (p->m_name) |
| 182 | strcpy(mode, p->m_mode); |
| 183 | else |
| 184 | printf("%s: unknown mode\n", argv[1]); |
| 185 | } |
| 186 | |
| 187 | /* |
| 188 | * Send file(s). |
| 189 | */ |
| 190 | put(argc, argv) |
| 191 | char *argv[]; |
| 192 | { |
| 193 | int fd; |
| 194 | register int n, addr; |
| 195 | register char *cp, *targ; |
| 196 | |
| 197 | if (argc < 2) { |
| 198 | strcpy(line, "send "); |
| 199 | printf("(file) "); |
| 200 | gets(&line[strlen(line)]); |
| 201 | makeargv(); |
| 202 | argc = margc; |
| 203 | argv = margv; |
| 204 | } |
| 205 | if (argc < 2) { |
| 206 | putusage(argv[0]); |
| 207 | return; |
| 208 | } |
| 209 | targ = argv[argc - 1]; |
| 210 | if (index(argv[argc - 1], ':')) { |
| 211 | char *cp; |
| 212 | struct hostent *hp; |
| 213 | |
| 214 | for (n = 1; n < argc - 1; n++) |
| 215 | if (index(argv[n], ':')) { |
| 216 | putusage(argv[0]); |
| 217 | return; |
| 218 | } |
| 219 | cp = argv[argc - 1]; |
| 220 | targ = index(cp, ':'); |
| 221 | *targ++ = 0; |
| 222 | hp = gethostbyname(cp); |
| 223 | if (hp == 0) { |
| 224 | printf("%s: Unknown host.\n", cp); |
| 225 | return; |
| 226 | } |
| 227 | bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length); |
| 228 | sin.sin_family = hp->h_addrtype; |
| 229 | connected = 1; |
| 230 | hostname = hp->h_name; |
| 231 | } |
| 232 | if (!connected) { |
| 233 | printf("No target machine specified.\n"); |
| 234 | return; |
| 235 | } |
| 236 | sigset(SIGINT, intr); |
| 237 | if (argc < 4) { |
| 238 | cp = argc == 2 ? tail(targ) : argv[1]; |
| 239 | fd = open(cp); |
| 240 | if (fd < 0) { |
| 241 | perror(cp); |
| 242 | return; |
| 243 | } |
| 244 | sendfile(fd, targ); |
| 245 | return; |
| 246 | } |
| 247 | cp = index(targ, '\0'); |
| 248 | *cp++ = '/'; |
| 249 | for (n = 1; n < argc - 1; n++) { |
| 250 | strcpy(cp, tail(argv[n])); |
| 251 | fd = open(argv[n], 0); |
| 252 | if (fd < 0) { |
| 253 | perror(argv[n]); |
| 254 | continue; |
| 255 | } |
| 256 | sendfile(fd, targ); |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | putusage(s) |
| 261 | char *s; |
| 262 | { |
| 263 | printf("usage: %s file ... host:target, or\n", s); |
| 264 | printf(" %s file ... target (when already connected)\n", s); |
| 265 | } |
| 266 | |
| 267 | /* |
| 268 | * Receive file(s). |
| 269 | */ |
| 270 | get(argc, argv) |
| 271 | char *argv[]; |
| 272 | { |
| 273 | int fd; |
| 274 | register int n, addr; |
| 275 | register char *cp; |
| 276 | char *src; |
| 277 | |
| 278 | if (argc < 2) { |
| 279 | strcpy(line, "get "); |
| 280 | printf("(files) "); |
| 281 | gets(&line[strlen(line)]); |
| 282 | makeargv(); |
| 283 | argc = margc; |
| 284 | argv = margv; |
| 285 | } |
| 286 | if (argc < 2) { |
| 287 | getusage(argv[0]); |
| 288 | return; |
| 289 | } |
| 290 | if (!connected) |
| 291 | for (n = 1; n < argc - 1; n++) |
| 292 | if (index(argv[n], ':') == 0) { |
| 293 | getusage(argv[0]); |
| 294 | return; |
| 295 | } |
| 296 | sigset(SIGINT, intr); |
| 297 | for (n = 1; argc == 2 || n < argc - 1; n++) { |
| 298 | src = index(argv[n], ':'); |
| 299 | if (src == NULL) |
| 300 | src = argv[n]; |
| 301 | else { |
| 302 | struct hostent *hp; |
| 303 | |
| 304 | *src++ = 0; |
| 305 | hp = gethostbyname(argv[n]); |
| 306 | if (hp == 0) { |
| 307 | printf("%s: Unknown host.\n", argv[n]); |
| 308 | continue; |
| 309 | } |
| 310 | bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length); |
| 311 | sin.sin_family = hp->h_addrtype; |
| 312 | connected = 1; |
| 313 | hostname = hp->h_name; |
| 314 | } |
| 315 | if (argc < 4) { |
| 316 | cp = argc == 3 ? argv[2] : tail(src); |
| 317 | fd = creat(cp, 0644); |
| 318 | if (fd < 0) { |
| 319 | perror(cp); |
| 320 | return; |
| 321 | } |
| 322 | recvfile(fd, src); |
| 323 | break; |
| 324 | } |
| 325 | cp = index(argv[argc - 1], '\0'); |
| 326 | *cp++ = '/'; |
| 327 | strcpy(cp, tail(src)); |
| 328 | fd = creat(src, 0644); |
| 329 | if (fd < 0) { |
| 330 | perror(src); |
| 331 | continue; |
| 332 | } |
| 333 | recvfile(fd, src); |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | getusage(s) |
| 338 | { |
| 339 | printf("usage: %s host:file host:file ... file, or\n", s); |
| 340 | printf(" %s file file ... file if connected\n", s); |
| 341 | } |
| 342 | |
| 343 | status(argc, argv) |
| 344 | char *argv[]; |
| 345 | { |
| 346 | if (connected) |
| 347 | printf("Connected to %s.\n", hostname); |
| 348 | else |
| 349 | printf("Not connected.\n"); |
| 350 | printf("Mode: %s Verbose: %s Tracing: %s\n", mode, |
| 351 | verbose ? "on" : "off", trace ? "on" : "off"); |
| 352 | } |
| 353 | |
| 354 | intr() |
| 355 | { |
| 356 | longjmp(toplevel, -1); |
| 357 | } |
| 358 | |
| 359 | char * |
| 360 | tail(filename) |
| 361 | char *filename; |
| 362 | { |
| 363 | register char *s; |
| 364 | |
| 365 | while (*filename) { |
| 366 | s = rindex(filename, '/'); |
| 367 | if (s == NULL) |
| 368 | break; |
| 369 | if (s[1]) |
| 370 | return (s + 1); |
| 371 | *s = '\0'; |
| 372 | } |
| 373 | return (filename); |
| 374 | } |
| 375 | |
| 376 | /* |
| 377 | * Command parser. |
| 378 | */ |
| 379 | command(top) |
| 380 | int top; |
| 381 | { |
| 382 | register struct cmd *c; |
| 383 | |
| 384 | if (!top) |
| 385 | putchar('\n'); |
| 386 | else |
| 387 | sigset(SIGINT, SIG_DFL); |
| 388 | for (;;) { |
| 389 | printf("%s> ", prompt); |
| 390 | if (gets(line) == 0) |
| 391 | break; |
| 392 | if (line[0] == 0) |
| 393 | break; |
| 394 | makeargv(); |
| 395 | c = getcmd(margv[0]); |
| 396 | if (c == (struct cmd *)-1) { |
| 397 | printf("?Ambiguous command\n"); |
| 398 | continue; |
| 399 | } |
| 400 | if (c == 0) { |
| 401 | printf("?Invalid command\n"); |
| 402 | continue; |
| 403 | } |
| 404 | (*c->handler)(margc, margv); |
| 405 | if (c->handler != help) |
| 406 | break; |
| 407 | } |
| 408 | longjmp(toplevel, 1); |
| 409 | } |
| 410 | |
| 411 | struct cmd * |
| 412 | getcmd(name) |
| 413 | register char *name; |
| 414 | { |
| 415 | register char *p, *q; |
| 416 | register struct cmd *c, *found; |
| 417 | register int nmatches, longest; |
| 418 | |
| 419 | longest = 0; |
| 420 | nmatches = 0; |
| 421 | found = 0; |
| 422 | for (c = cmdtab; p = c->name; c++) { |
| 423 | for (q = name; *q == *p++; q++) |
| 424 | if (*q == 0) /* exact match? */ |
| 425 | return (c); |
| 426 | if (!*q) { /* the name was a prefix */ |
| 427 | if (q - name > longest) { |
| 428 | longest = q - name; |
| 429 | nmatches = 1; |
| 430 | found = c; |
| 431 | } else if (q - name == longest) |
| 432 | nmatches++; |
| 433 | } |
| 434 | } |
| 435 | if (nmatches > 1) |
| 436 | return ((struct cmd *)-1); |
| 437 | return (found); |
| 438 | } |
| 439 | |
| 440 | /* |
| 441 | * Slice a string up into argc/argv. |
| 442 | */ |
| 443 | makeargv() |
| 444 | { |
| 445 | register char *cp; |
| 446 | register char **argp = margv; |
| 447 | |
| 448 | margc = 0; |
| 449 | for (cp = line; *cp;) { |
| 450 | while (isspace(*cp)) |
| 451 | cp++; |
| 452 | if (*cp == '\0') |
| 453 | break; |
| 454 | *argp++ = cp; |
| 455 | margc += 1; |
| 456 | while (*cp != '\0' && !isspace(*cp)) |
| 457 | cp++; |
| 458 | if (*cp == '\0') |
| 459 | break; |
| 460 | *cp++ = '\0'; |
| 461 | } |
| 462 | *argp++ = 0; |
| 463 | } |
| 464 | |
| 465 | /*VARARGS*/ |
| 466 | quit() |
| 467 | { |
| 468 | exit(0); |
| 469 | } |
| 470 | |
| 471 | /* |
| 472 | * Help command. |
| 473 | */ |
| 474 | help(argc, argv) |
| 475 | int argc; |
| 476 | char *argv[]; |
| 477 | { |
| 478 | register struct cmd *c; |
| 479 | |
| 480 | if (argc == 1) { |
| 481 | printf("Commands may be abbreviated. Commands are:\n\n"); |
| 482 | for (c = cmdtab; c->name; c++) |
| 483 | printf("%-*s\t%s\n", HELPINDENT, c->name, c->help); |
| 484 | return; |
| 485 | } |
| 486 | while (--argc > 0) { |
| 487 | register char *arg; |
| 488 | arg = *++argv; |
| 489 | c = getcmd(arg); |
| 490 | if (c == (struct cmd *)-1) |
| 491 | printf("?Ambiguous help command %s\n", arg); |
| 492 | else if (c == (struct cmd *)0) |
| 493 | printf("?Invalid help command %s\n", arg); |
| 494 | else |
| 495 | printf("%s\n", c->help); |
| 496 | } |
| 497 | } |
| 498 | |
| 499 | /* |
| 500 | * Call routine with argc, argv set from args (terminated by 0). |
| 501 | */ |
| 502 | /* VARARGS2 */ |
| 503 | call(routine, args) |
| 504 | int (*routine)(); |
| 505 | int args; |
| 506 | { |
| 507 | register int *argp; |
| 508 | register int argc; |
| 509 | |
| 510 | for (argc = 0, argp = &args; *argp++ != 0; argc++) |
| 511 | ; |
| 512 | (*routine)(argc, &args); |
| 513 | } |
| 514 | |
| 515 | /*VARARGS*/ |
| 516 | settrace() |
| 517 | { |
| 518 | trace = !trace; |
| 519 | printf("Packet tracing %s.\n", trace ? "on" : "off"); |
| 520 | } |
| 521 | |
| 522 | /*VARARGS*/ |
| 523 | setverbose() |
| 524 | { |
| 525 | verbose = !verbose; |
| 526 | printf("Verbose mode %s.\n", verbose ? "on" : "off"); |
| 527 | } |