| 338 | } |
| 339 | |
| 340 | static int |
| 341 | ParseFtpPortCommand(struct libalias *la, char *sptr, int dlen) |
| 342 | { |
| 343 | char ch; |
| 344 | int i, state; |
| 345 | u_int32_t addr; |
| 346 | u_short port; |
| 347 | u_int8_t octet; |
| 348 | |
| 349 | /* Format: "PORT A,D,D,R,PO,RT". */ |
| 350 | |
| 351 | /* Return if data length is too short. */ |
| 352 | if (dlen < 18) |
| 353 | return (0); |
| 354 | |
| 355 | if (strncasecmp("PORT ", sptr, 5)) |
| 356 | return (0); |
| 357 | |
| 358 | addr = port = octet = 0; |
| 359 | state = 0; |
| 360 | for (i = 5; i < dlen; i++) { |
| 361 | ch = sptr[i]; |
| 362 | switch (state) { |
| 363 | case 0: |
| 364 | if (isspace(ch)) |
| 365 | break; |
| 366 | else |
| 367 | state++; |
| 368 | case 1: |
| 369 | case 3: |
| 370 | case 5: |
| 371 | case 7: |
| 372 | case 9: |
| 373 | case 11: |
| 374 | if (isdigit(ch)) { |
| 375 | octet = ch - '0'; |
| 376 | state++; |
| 377 | } else |
| 378 | return (0); |
| 379 | break; |
| 380 | case 2: |
| 381 | case 4: |
| 382 | case 6: |
| 383 | case 8: |
| 384 | if (isdigit(ch)) |
| 385 | octet = 10 * octet + ch - '0'; |
| 386 | else if (ch == ',') { |
| 387 | addr = (addr << 8) + octet; |
| 388 | state++; |
| 389 | } else |
| 390 | return (0); |
| 391 | break; |
| 392 | case 10: |
| 393 | case 12: |
| 394 | if (isdigit(ch)) |
| 395 | octet = 10 * octet + ch - '0'; |
| 396 | else if (ch == ',' || state == 12) { |
| 397 | port = (port << 8) + octet; |
no test coverage detected