| 1 | /*- |
| 2 | * SPDX-License-Identifier: (BSD-3-Clause AND Beerware) |
| 3 | * |
| 4 | * Copyright (c) 1998-2011 Dag-Erling Smørgrav |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer |
| 12 | * in this position and unchanged. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. The name of the author may not be used to endorse or promote products |
| 17 | * derived from this software without specific prior written permission |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 20 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 21 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 22 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 24 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 25 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 26 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 28 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 | * |
| 30 | * $FreeBSD: head/lib/libfetch/ftp.c 341013 2018-11-27 10:45:14Z des $ |
| 31 | */ |
| 32 | |
| 33 | /* |
| 34 | * Portions of this code were taken from or based on ftpio.c: |
| 35 | * |
| 36 | * ---------------------------------------------------------------------------- |
| 37 | * "THE BEER-WARE LICENSE" (Revision 42): |
| 38 | * <phk@FreeBSD.org> wrote this file. As long as you retain this notice you |
| 39 | * can do whatever you want with this stuff. If we meet some day, and you think |
| 40 | * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp |
| 41 | * ---------------------------------------------------------------------------- |
| 42 | * |
| 43 | * Major Changelog: |
| 44 | * |
| 45 | * Dag-Erling Smørgrav |
| 46 | * 9 Jun 1998 |
| 47 | * |
| 48 | * Incorporated into libfetch |
| 49 | * |
| 50 | * Jordan K. Hubbard |
| 51 | * 17 Jan 1996 |
| 52 | * |
| 53 | * Turned inside out. Now returns xfers as new file ids, not as a special |
| 54 | * `state' of FTP_t |
| 55 | * |
| 56 | * $ftpioId: ftpio.c,v 1.30 1998/04/11 07:28:53 phk Exp $ |
| 57 | * |
| 58 | */ |
| 59 | |
| 60 | #include <sys/param.h> |
| 61 | #include <sys/socket.h> |
| 62 | #include <netinet/in.h> |
| 63 | |
| 64 | #include <ctype.h> |
| 65 | #include <err.h> |
| 66 | #include <errno.h> |
| 67 | #include <fcntl.h> |
| 68 | #include <netdb.h> |
| 69 | #include <stdarg.h> |
| 70 | #include <stdint.h> |
| 71 | #include <stdio.h> |
| 72 | #include <stdlib.h> |
| 73 | #include <string.h> |
| 74 | #include <time.h> |
| 75 | #include <unistd.h> |
| 76 | |
| 77 | #include "fetch.h" |
| 78 | #include "common.h" |
| 79 | #include "ftperr.h" |
| 80 | |
| 81 | #define FTP_ANONYMOUS_USER "anonymous" |
| 82 | |
| 83 | #define FTP_CONNECTION_ALREADY_OPEN 125 |
| 84 | #define FTP_OPEN_DATA_CONNECTION 150 |
| 85 | #define FTP_OK 200 |
| 86 | #define FTP_FILE_STATUS 213 |
| 87 | #define FTP_SERVICE_READY 220 |
| 88 | #define FTP_TRANSFER_COMPLETE 226 |
| 89 | #define FTP_PASSIVE_MODE 227 |
| 90 | #define FTP_LPASSIVE_MODE 228 |
| 91 | #define FTP_EPASSIVE_MODE 229 |
| 92 | #define FTP_LOGGED_IN 230 |
| 93 | #define FTP_FILE_ACTION_OK 250 |
| 94 | #define FTP_DIRECTORY_CREATED 257 /* multiple meanings */ |
| 95 | #define FTP_FILE_CREATED 257 /* multiple meanings */ |
| 96 | #define FTP_WORKING_DIRECTORY 257 /* multiple meanings */ |
| 97 | #define FTP_NEED_PASSWORD 331 |
| 98 | #define FTP_NEED_ACCOUNT 332 |
| 99 | #define FTP_FILE_OK 350 |
| 100 | #define FTP_SYNTAX_ERROR 500 |
| 101 | #define FTP_PROTOCOL_ERROR 999 |
| 102 | |
| 103 | static int ftp_cmd(conn_t *, const char *, ...) __printflike(2, 3); |
| 104 | static struct url cached_host; |
| 105 | static conn_t *cached_connection; |
| 106 | |
| 107 | #define isftpreply(foo) \ |
| 108 | (isdigit((unsigned char)foo[0]) && \ |
| 109 | isdigit((unsigned char)foo[1]) && \ |
| 110 | isdigit((unsigned char)foo[2]) && \ |
| 111 | (foo[3] == ' ' || foo[3] == '\0')) |
| 112 | #define isftpinfo(foo) \ |
| 113 | (isdigit((unsigned char)foo[0]) && \ |
| 114 | isdigit((unsigned char)foo[1]) && \ |
| 115 | isdigit((unsigned char)foo[2]) && \ |
| 116 | foo[3] == '-') |
| 117 | |
| 118 | /* |
| 119 | * Translate IPv4 mapped IPv6 address to IPv4 address |
| 120 | */ |
| 121 | static void |
| 122 | unmappedaddr(struct sockaddr_in6 *sin6) |
| 123 | { |
| 124 | struct sockaddr_in *sin4; |
| 125 | void *addr; |
| 126 | int port; |
| 127 | |
| 128 | if (sin6->sin6_family != AF_INET6 || |
| 129 | !IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) |
| 130 | return; |
| 131 | sin4 = (struct sockaddr_in *)sin6; |
| 132 | addr = &sin6->sin6_addr.s6_addr[12]; |
| 133 | port = sin6->sin6_port; |
| 134 | memset(sin4, 0, sizeof(struct sockaddr_in)); |
| 135 | sin4->sin_addr.s_addr = *(uint32_t *)addr; |
| 136 | sin4->sin_port = port; |
| 137 | sin4->sin_family = AF_INET; |
| 138 | sin4->sin_len = sizeof(struct sockaddr_in); |
| 139 | } |
| 140 | |
| 141 | /* |
| 142 | * Get server response |
| 143 | */ |
| 144 | static int |
| 145 | ftp_chkerr(conn_t *conn) |
| 146 | { |
| 147 | if (fetch_getln(conn) == -1) { |
| 148 | fetch_syserr(); |
| 149 | return (-1); |
| 150 | } |
| 151 | if (isftpinfo(conn->buf)) { |
| 152 | while (conn->buflen && !isftpreply(conn->buf)) { |
| 153 | if (fetch_getln(conn) == -1) { |
| 154 | fetch_syserr(); |
| 155 | return (-1); |
| 156 | } |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | while (conn->buflen && |
| 161 | isspace((unsigned char)conn->buf[conn->buflen - 1])) |
| 162 | conn->buflen--; |
| 163 | conn->buf[conn->buflen] = '\0'; |
| 164 | |
| 165 | if (!isftpreply(conn->buf)) { |
| 166 | ftp_seterr(FTP_PROTOCOL_ERROR); |
| 167 | return (-1); |
| 168 | } |
| 169 | |
| 170 | conn->err = (conn->buf[0] - '0') * 100 |
| 171 | + (conn->buf[1] - '0') * 10 |
| 172 | + (conn->buf[2] - '0'); |
| 173 | |
| 174 | return (conn->err); |
| 175 | } |
| 176 | |
| 177 | /* |
| 178 | * Send a command and check reply |
| 179 | */ |
| 180 | static int |
| 181 | ftp_cmd(conn_t *conn, const char *fmt, ...) |
| 182 | { |
| 183 | va_list ap; |
| 184 | size_t len; |
| 185 | char *msg; |
| 186 | int r; |
| 187 | |
| 188 | va_start(ap, fmt); |
| 189 | len = vasprintf(&msg, fmt, ap); |
| 190 | va_end(ap); |
| 191 | |
| 192 | if (msg == NULL) { |
| 193 | errno = ENOMEM; |
| 194 | fetch_syserr(); |
| 195 | return (-1); |
| 196 | } |
| 197 | |
| 198 | r = fetch_putln(conn, msg, len); |
| 199 | free(msg); |
| 200 | |
| 201 | if (r == -1) { |
| 202 | fetch_syserr(); |
| 203 | return (-1); |
| 204 | } |
| 205 | |
| 206 | return (ftp_chkerr(conn)); |
| 207 | } |
| 208 | |
| 209 | /* |
| 210 | * Return a pointer to the filename part of a path |
| 211 | */ |
| 212 | static const char * |
| 213 | ftp_filename(const char *file, int *len, int *type) |
| 214 | { |
| 215 | const char *s; |
| 216 | |
| 217 | if ((s = strrchr(file, '/')) == NULL) |
| 218 | s = file; |
| 219 | else |
| 220 | s = s + 1; |
| 221 | *len = strlen(s); |
| 222 | if (*len > 7 && strncmp(s + *len - 7, ";type=", 6) == 0) { |
| 223 | *type = s[*len - 1]; |
| 224 | *len -= 7; |
| 225 | } else { |
| 226 | *type = '\0'; |
| 227 | } |
| 228 | return (s); |
| 229 | } |
| 230 | |
| 231 | /* |
| 232 | * Get current working directory from the reply to a CWD, PWD or CDUP |
| 233 | * command. |
| 234 | */ |
| 235 | static int |
| 236 | ftp_pwd(conn_t *conn, char *pwd, size_t pwdlen) |
| 237 | { |
| 238 | char *src, *dst, *end; |
| 239 | int q; |
| 240 | |
| 241 | if (conn->err != FTP_WORKING_DIRECTORY && |
| 242 | conn->err != FTP_FILE_ACTION_OK) |
| 243 | return (FTP_PROTOCOL_ERROR); |
| 244 | end = conn->buf + conn->buflen; |
| 245 | src = conn->buf + 4; |
| 246 | if (src >= end || *src++ != '"') |
| 247 | return (FTP_PROTOCOL_ERROR); |
| 248 | for (q = 0, dst = pwd; src < end && pwdlen--; ++src) { |
| 249 | if (!q && *src == '"') |
| 250 | q = 1; |
| 251 | else if (q && *src != '"') |
| 252 | break; |
| 253 | else if (q) |
| 254 | *dst++ = '"', q = 0; |
| 255 | else |
| 256 | *dst++ = *src; |
| 257 | } |
| 258 | if (!pwdlen) |
| 259 | return (FTP_PROTOCOL_ERROR); |
| 260 | *dst = '\0'; |
| 261 | #if 0 |
| 262 | DEBUGF("pwd: [%s]\n", pwd); |
| 263 | #endif |
| 264 | return (FTP_OK); |
| 265 | } |
| 266 | |
| 267 | /* |
| 268 | * Change working directory to the directory that contains the specified |
| 269 | * file. |
| 270 | */ |
| 271 | static int |
| 272 | ftp_cwd(conn_t *conn, const char *file) |
| 273 | { |
| 274 | const char *beg, *end; |
| 275 | char pwd[PATH_MAX]; |
| 276 | int e, i, len; |
| 277 | |
| 278 | /* If no slashes in name, no need to change dirs. */ |
| 279 | if ((end = strrchr(file, '/')) == NULL) |
| 280 | return (0); |
| 281 | if ((e = ftp_cmd(conn, "PWD")) != FTP_WORKING_DIRECTORY || |
| 282 | (e = ftp_pwd(conn, pwd, sizeof(pwd))) != FTP_OK) { |
| 283 | ftp_seterr(e); |
| 284 | return (-1); |
| 285 | } |
| 286 | for (;;) { |
| 287 | len = strlen(pwd); |
| 288 | |
| 289 | /* Look for a common prefix between PWD and dir to fetch. */ |
| 290 | for (i = 0; i <= len && i <= end - file; ++i) |
| 291 | if (pwd[i] != file[i]) |
| 292 | break; |
| 293 | #if 0 |
| 294 | DEBUGF("have: [%.*s|%s]\n", i, pwd, pwd + i); |
| 295 | DEBUGF("want: [%.*s|%s]\n", i, file, file + i); |
| 296 | #endif |
| 297 | /* Keep going up a dir until we have a matching prefix. */ |
| 298 | if (pwd[i] == '\0' && (file[i - 1] == '/' || file[i] == '/')) |
| 299 | break; |
| 300 | if ((e = ftp_cmd(conn, "CDUP")) != FTP_FILE_ACTION_OK || |
| 301 | (e = ftp_cmd(conn, "PWD")) != FTP_WORKING_DIRECTORY || |
| 302 | (e = ftp_pwd(conn, pwd, sizeof(pwd))) != FTP_OK) { |
| 303 | ftp_seterr(e); |
| 304 | return (-1); |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | #ifdef FTP_COMBINE_CWDS |
| 309 | /* Skip leading slashes, even "////". */ |
| 310 | for (beg = file + i; beg < end && *beg == '/'; ++beg, ++i) |
| 311 | /* nothing */ ; |
| 312 | |
| 313 | /* If there is no trailing dir, we're already there. */ |
| 314 | if (beg >= end) |
| 315 | return (0); |
| 316 | |
| 317 | /* Change to the directory all in one chunk (e.g., foo/bar/baz). */ |
| 318 | e = ftp_cmd(conn, "CWD %.*s", (int)(end - beg), beg); |
| 319 | if (e == FTP_FILE_ACTION_OK) |
| 320 | return (0); |
| 321 | #endif /* FTP_COMBINE_CWDS */ |
| 322 | |
| 323 | /* That didn't work so go back to legacy behavior (multiple CWDs). */ |
| 324 | for (beg = file + i; beg < end; beg = file + i + 1) { |
| 325 | while (*beg == '/') |
| 326 | ++beg, ++i; |
| 327 | for (++i; file + i < end && file[i] != '/'; ++i) |
| 328 | /* nothing */ ; |
| 329 | e = ftp_cmd(conn, "CWD %.*s", (int)(file + i - beg), beg); |
| 330 | if (e != FTP_FILE_ACTION_OK) { |
| 331 | ftp_seterr(e); |
| 332 | return (-1); |
| 333 | } |
| 334 | } |
| 335 | return (0); |
| 336 | } |
| 337 | |
| 338 | /* |
| 339 | * Set transfer mode and data type |
| 340 | */ |
| 341 | static int |
| 342 | ftp_mode_type(conn_t *conn, int mode, int type) |
| 343 | { |
| 344 | int e; |
| 345 | |
| 346 | switch (mode) { |
| 347 | case 0: |
| 348 | case 's': |
| 349 | mode = 'S'; |
| 350 | case 'S': |
| 351 | break; |
| 352 | default: |
| 353 | return (FTP_PROTOCOL_ERROR); |
| 354 | } |
| 355 | if ((e = ftp_cmd(conn, "MODE %c", mode)) != FTP_OK) { |
| 356 | if (mode == 'S') { |
| 357 | /* |
| 358 | * Stream mode is supposed to be the default - so |
| 359 | * much so that some servers not only do not |
| 360 | * support any other mode, but do not support the |
| 361 | * MODE command at all. |
| 362 | * |
| 363 | * If "MODE S" fails, it is unlikely that we |
| 364 | * previously succeeded in setting a different |
| 365 | * mode. Therefore, we simply hope that the |
| 366 | * server is already in the correct mode, and |
| 367 | * silently ignore the failure. |
| 368 | */ |
| 369 | } else { |
| 370 | return (e); |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | switch (type) { |
| 375 | case 0: |
| 376 | case 'i': |
| 377 | type = 'I'; |
| 378 | case 'I': |
| 379 | break; |
| 380 | case 'a': |
| 381 | type = 'A'; |
| 382 | case 'A': |
| 383 | break; |
| 384 | case 'd': |
| 385 | type = 'D'; |
| 386 | /* FALLTHROUGH */ |
| 387 | case 'D': |
| 388 | /* can't handle yet */ |
| 389 | default: |
| 390 | return (FTP_PROTOCOL_ERROR); |
| 391 | } |
| 392 | if ((e = ftp_cmd(conn, "TYPE %c", type)) != FTP_OK) |
| 393 | return (e); |
| 394 | |
| 395 | return (FTP_OK); |
| 396 | } |
| 397 | |
| 398 | /* |
| 399 | * Request and parse file stats |
| 400 | */ |
| 401 | static int |
| 402 | ftp_stat(conn_t *conn, const char *file, struct url_stat *us) |
| 403 | { |
| 404 | char *ln; |
| 405 | const char *filename; |
| 406 | int filenamelen, type; |
| 407 | struct tm tm; |
| 408 | time_t t; |
| 409 | int e; |
| 410 | |
| 411 | us->size = -1; |
| 412 | us->atime = us->mtime = 0; |
| 413 | |
| 414 | filename = ftp_filename(file, &filenamelen, &type); |
| 415 | |
| 416 | if ((e = ftp_mode_type(conn, 0, type)) != FTP_OK) { |
| 417 | ftp_seterr(e); |
| 418 | return (-1); |
| 419 | } |
| 420 | |
| 421 | e = ftp_cmd(conn, "SIZE %.*s", filenamelen, filename); |
| 422 | if (e != FTP_FILE_STATUS) { |
| 423 | ftp_seterr(e); |
| 424 | return (-1); |
| 425 | } |
| 426 | for (ln = conn->buf + 4; *ln && isspace((unsigned char)*ln); ln++) |
| 427 | /* nothing */ ; |
| 428 | for (us->size = 0; *ln && isdigit((unsigned char)*ln); ln++) |
| 429 | us->size = us->size * 10 + *ln - '0'; |
| 430 | if (*ln && !isspace((unsigned char)*ln)) { |
| 431 | ftp_seterr(FTP_PROTOCOL_ERROR); |
| 432 | us->size = -1; |
| 433 | return (-1); |
| 434 | } |
| 435 | if (us->size == 0) |
| 436 | us->size = -1; |
| 437 | DEBUGF("size: [%lld]\n", (long long)us->size); |
| 438 | |
| 439 | e = ftp_cmd(conn, "MDTM %.*s", filenamelen, filename); |
| 440 | if (e != FTP_FILE_STATUS) { |
| 441 | ftp_seterr(e); |
| 442 | return (-1); |
| 443 | } |
| 444 | for (ln = conn->buf + 4; *ln && isspace((unsigned char)*ln); ln++) |
| 445 | /* nothing */ ; |
| 446 | switch (strspn(ln, "0123456789")) { |
| 447 | case 14: |
| 448 | break; |
| 449 | case 15: |
| 450 | ln++; |
| 451 | ln[0] = '2'; |
| 452 | ln[1] = '0'; |
| 453 | break; |
| 454 | default: |
| 455 | ftp_seterr(FTP_PROTOCOL_ERROR); |
| 456 | return (-1); |
| 457 | } |
| 458 | if (sscanf(ln, "%04d%02d%02d%02d%02d%02d", |
| 459 | &tm.tm_year, &tm.tm_mon, &tm.tm_mday, |
| 460 | &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) { |
| 461 | ftp_seterr(FTP_PROTOCOL_ERROR); |
| 462 | return (-1); |
| 463 | } |
| 464 | tm.tm_mon--; |
| 465 | tm.tm_year -= 1900; |
| 466 | tm.tm_isdst = -1; |
| 467 | t = timegm(&tm); |
| 468 | if (t == (time_t)-1) |
| 469 | t = time(NULL); |
| 470 | us->mtime = t; |
| 471 | us->atime = t; |
| 472 | DEBUGF("last modified: [%04d-%02d-%02d %02d:%02d:%02d]\n", |
| 473 | tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, |
| 474 | tm.tm_hour, tm.tm_min, tm.tm_sec); |
| 475 | return (0); |
| 476 | } |
| 477 | |
| 478 | /* |
| 479 | * I/O functions for FTP |
| 480 | */ |
| 481 | struct ftpio { |
| 482 | conn_t *cconn; /* Control connection */ |
| 483 | conn_t *dconn; /* Data connection */ |
| 484 | int dir; /* Direction */ |
| 485 | int eof; /* EOF reached */ |
| 486 | int err; /* Error code */ |
| 487 | }; |
| 488 | |
| 489 | static int ftp_readfn(void *, char *, int); |
| 490 | static int ftp_writefn(void *, const char *, int); |
| 491 | static fpos_t ftp_seekfn(void *, fpos_t, int); |
| 492 | static int ftp_closefn(void *); |
| 493 | |
| 494 | static int |
| 495 | ftp_readfn(void *v, char *buf, int len) |
| 496 | { |
| 497 | struct ftpio *io; |
| 498 | int r; |
| 499 | |
| 500 | io = (struct ftpio *)v; |
| 501 | if (io == NULL) { |
| 502 | errno = EBADF; |
| 503 | return (-1); |
| 504 | } |
| 505 | if (io->cconn == NULL || io->dconn == NULL || io->dir == O_WRONLY) { |
| 506 | errno = EBADF; |
| 507 | return (-1); |
| 508 | } |
| 509 | if (io->err) { |
| 510 | errno = io->err; |
| 511 | return (-1); |
| 512 | } |
| 513 | if (io->eof) |
| 514 | return (0); |
| 515 | r = fetch_read(io->dconn, buf, len); |
| 516 | if (r > 0) |
| 517 | return (r); |
| 518 | if (r == 0) { |
| 519 | io->eof = 1; |
| 520 | return (0); |
| 521 | } |
| 522 | if (errno != EINTR) |
| 523 | io->err = errno; |
| 524 | return (-1); |
| 525 | } |
| 526 | |
| 527 | static int |
| 528 | ftp_writefn(void *v, const char *buf, int len) |
| 529 | { |
| 530 | struct ftpio *io; |
| 531 | int w; |
| 532 | |
| 533 | io = (struct ftpio *)v; |
| 534 | if (io == NULL) { |
| 535 | errno = EBADF; |
| 536 | return (-1); |
| 537 | } |
| 538 | if (io->cconn == NULL || io->dconn == NULL || io->dir == O_RDONLY) { |
| 539 | errno = EBADF; |
| 540 | return (-1); |
| 541 | } |
| 542 | if (io->err) { |
| 543 | errno = io->err; |
| 544 | return (-1); |
| 545 | } |
| 546 | w = fetch_write(io->dconn, buf, len); |
| 547 | if (w >= 0) |
| 548 | return (w); |
| 549 | if (errno != EINTR) |
| 550 | io->err = errno; |
| 551 | return (-1); |
| 552 | } |
| 553 | |
| 554 | static fpos_t |
| 555 | ftp_seekfn(void *v, fpos_t pos __unused, int whence __unused) |
| 556 | { |
| 557 | struct ftpio *io; |
| 558 | |
| 559 | io = (struct ftpio *)v; |
| 560 | if (io == NULL) { |
| 561 | errno = EBADF; |
| 562 | return (-1); |
| 563 | } |
| 564 | errno = ESPIPE; |
| 565 | return (-1); |
| 566 | } |
| 567 | |
| 568 | static int |
| 569 | ftp_closefn(void *v) |
| 570 | { |
| 571 | struct ftpio *io; |
| 572 | int r; |
| 573 | |
| 574 | io = (struct ftpio *)v; |
| 575 | if (io == NULL) { |
| 576 | errno = EBADF; |
| 577 | return (-1); |
| 578 | } |
| 579 | if (io->dir == -1) |
| 580 | return (0); |
| 581 | if (io->cconn == NULL || io->dconn == NULL) { |
| 582 | errno = EBADF; |
| 583 | return (-1); |
| 584 | } |
| 585 | fetch_close(io->dconn); |
| 586 | io->dir = -1; |
| 587 | io->dconn = NULL; |
| 588 | DEBUGF("Waiting for final status\n"); |
| 589 | r = ftp_chkerr(io->cconn); |
| 590 | if (io->cconn == cached_connection && io->cconn->ref == 1) |
| 591 | cached_connection = NULL; |
| 592 | fetch_close(io->cconn); |
| 593 | free(io); |
| 594 | return (r == FTP_TRANSFER_COMPLETE) ? 0 : -1; |
| 595 | } |
| 596 | |
| 597 | static FILE * |
| 598 | ftp_setup(conn_t *cconn, conn_t *dconn, int mode) |
| 599 | { |
| 600 | struct ftpio *io; |
| 601 | FILE *f; |
| 602 | |
| 603 | if (cconn == NULL || dconn == NULL) |
| 604 | return (NULL); |
| 605 | if ((io = malloc(sizeof(*io))) == NULL) |
| 606 | return (NULL); |
| 607 | io->cconn = cconn; |
| 608 | io->dconn = dconn; |
| 609 | io->dir = mode; |
| 610 | io->eof = io->err = 0; |
| 611 | f = funopen(io, ftp_readfn, ftp_writefn, ftp_seekfn, ftp_closefn); |
| 612 | if (f == NULL) |
| 613 | free(io); |
| 614 | return (f); |
| 615 | } |
| 616 | |
| 617 | /* |
| 618 | * Transfer file |
| 619 | */ |
| 620 | static FILE * |
| 621 | ftp_transfer(conn_t *conn, const char *oper, const char *file, |
| 622 | int mode, off_t offset, const char *flags) |
| 623 | { |
| 624 | struct sockaddr_storage sa; |
| 625 | struct sockaddr_in6 *sin6; |
| 626 | struct sockaddr_in *sin4; |
| 627 | const char *bindaddr; |
| 628 | const char *filename; |
| 629 | int filenamelen, type; |
| 630 | int low, pasv, verbose; |
| 631 | int e, sd = -1; |
| 632 | socklen_t l; |
| 633 | char *s; |
| 634 | FILE *df; |
| 635 | |
| 636 | /* check flags */ |
| 637 | low = CHECK_FLAG('l'); |
| 638 | pasv = CHECK_FLAG('p') || !CHECK_FLAG('P'); |
| 639 | verbose = CHECK_FLAG('v'); |
| 640 | |
| 641 | /* passive mode */ |
| 642 | if ((s = getenv("FTP_PASSIVE_MODE")) != NULL) |
| 643 | pasv = (strncasecmp(s, "no", 2) != 0); |
| 644 | |
| 645 | /* isolate filename */ |
| 646 | filename = ftp_filename(file, &filenamelen, &type); |
| 647 | |
| 648 | /* set transfer mode and data type */ |
| 649 | if ((e = ftp_mode_type(conn, 0, type)) != FTP_OK) |
| 650 | goto ouch; |
| 651 | |
| 652 | /* find our own address, bind, and listen */ |
| 653 | l = sizeof(sa); |
| 654 | if (getsockname(conn->sd, (struct sockaddr *)&sa, &l) == -1) |
| 655 | goto sysouch; |
| 656 | if (sa.ss_family == AF_INET6) |
| 657 | unmappedaddr((struct sockaddr_in6 *)&sa); |
| 658 | |
| 659 | /* open data socket */ |
| 660 | if ((sd = socket(sa.ss_family, SOCK_STREAM, IPPROTO_TCP)) == -1) { |
| 661 | fetch_syserr(); |
| 662 | return (NULL); |
| 663 | } |
| 664 | |
| 665 | if (pasv) { |
| 666 | u_char addr[64]; |
| 667 | char *ln, *p; |
| 668 | unsigned int i; |
| 669 | int port; |
| 670 | |
| 671 | /* send PASV command */ |
| 672 | if (verbose) |
| 673 | fetch_info("setting passive mode"); |
| 674 | switch (sa.ss_family) { |
| 675 | case AF_INET: |
| 676 | if ((e = ftp_cmd(conn, "PASV")) != FTP_PASSIVE_MODE) |
| 677 | goto ouch; |
| 678 | break; |
| 679 | case AF_INET6: |
| 680 | if ((e = ftp_cmd(conn, "EPSV")) != FTP_EPASSIVE_MODE) { |
| 681 | if (e == -1) |
| 682 | goto ouch; |
| 683 | if ((e = ftp_cmd(conn, "LPSV")) != |
| 684 | FTP_LPASSIVE_MODE) |
| 685 | goto ouch; |
| 686 | } |
| 687 | break; |
| 688 | default: |
| 689 | e = FTP_PROTOCOL_ERROR; /* XXX: error code should be prepared */ |
| 690 | goto ouch; |
| 691 | } |
| 692 | |
| 693 | /* |
| 694 | * Find address and port number. The reply to the PASV command |
| 695 | * is IMHO the one and only weak point in the FTP protocol. |
| 696 | */ |
| 697 | ln = conn->buf; |
| 698 | switch (e) { |
| 699 | case FTP_PASSIVE_MODE: |
| 700 | case FTP_LPASSIVE_MODE: |
| 701 | for (p = ln + 3; *p && !isdigit((unsigned char)*p); p++) |
| 702 | /* nothing */ ; |
| 703 | if (!*p) { |
| 704 | e = FTP_PROTOCOL_ERROR; |
| 705 | goto ouch; |
| 706 | } |
| 707 | l = (e == FTP_PASSIVE_MODE ? 6 : 21); |
| 708 | for (i = 0; *p && i < l; i++, p++) |
| 709 | addr[i] = strtol(p, &p, 10); |
| 710 | if (i < l) { |
| 711 | e = FTP_PROTOCOL_ERROR; |
| 712 | goto ouch; |
| 713 | } |
| 714 | break; |
| 715 | case FTP_EPASSIVE_MODE: |
| 716 | for (p = ln + 3; *p && *p != '('; p++) |
| 717 | /* nothing */ ; |
| 718 | if (!*p) { |
| 719 | e = FTP_PROTOCOL_ERROR; |
| 720 | goto ouch; |
| 721 | } |
| 722 | ++p; |
| 723 | if (sscanf(p, "%c%c%c%d%c", &addr[0], &addr[1], &addr[2], |
| 724 | &port, &addr[3]) != 5 || |
| 725 | addr[0] != addr[1] || |
| 726 | addr[0] != addr[2] || addr[0] != addr[3]) { |
| 727 | e = FTP_PROTOCOL_ERROR; |
| 728 | goto ouch; |
| 729 | } |
| 730 | break; |
| 731 | } |
| 732 | |
| 733 | /* seek to required offset */ |
| 734 | if (offset) |
| 735 | if (ftp_cmd(conn, "REST %lu", (u_long)offset) != FTP_FILE_OK) |
| 736 | goto sysouch; |
| 737 | |
| 738 | /* construct sockaddr for data socket */ |
| 739 | l = sizeof(sa); |
| 740 | if (getpeername(conn->sd, (struct sockaddr *)&sa, &l) == -1) |
| 741 | goto sysouch; |
| 742 | if (sa.ss_family == AF_INET6) |
| 743 | unmappedaddr((struct sockaddr_in6 *)&sa); |
| 744 | switch (sa.ss_family) { |
| 745 | case AF_INET6: |
| 746 | sin6 = (struct sockaddr_in6 *)&sa; |
| 747 | if (e == FTP_EPASSIVE_MODE) |
| 748 | sin6->sin6_port = htons(port); |
| 749 | else { |
| 750 | memcpy(&sin6->sin6_addr, addr + 2, 16); |
| 751 | memcpy(&sin6->sin6_port, addr + 19, 2); |
| 752 | } |
| 753 | break; |
| 754 | case AF_INET: |
| 755 | sin4 = (struct sockaddr_in *)&sa; |
| 756 | if (e == FTP_EPASSIVE_MODE) |
| 757 | sin4->sin_port = htons(port); |
| 758 | else { |
| 759 | memcpy(&sin4->sin_addr, addr, 4); |
| 760 | memcpy(&sin4->sin_port, addr + 4, 2); |
| 761 | } |
| 762 | break; |
| 763 | default: |
| 764 | e = FTP_PROTOCOL_ERROR; /* XXX: error code should be prepared */ |
| 765 | break; |
| 766 | } |
| 767 | |
| 768 | /* connect to data port */ |
| 769 | if (verbose) |
| 770 | fetch_info("opening data connection"); |
| 771 | bindaddr = getenv("FETCH_BIND_ADDRESS"); |
| 772 | if (bindaddr != NULL && *bindaddr != '\0' && |
| 773 | (e = fetch_bind(sd, sa.ss_family, bindaddr)) != 0) |
| 774 | goto ouch; |
| 775 | if (connect(sd, (struct sockaddr *)&sa, sa.ss_len) == -1) |
| 776 | goto sysouch; |
| 777 | |
| 778 | /* make the server initiate the transfer */ |
| 779 | if (verbose) |
| 780 | fetch_info("initiating transfer"); |
| 781 | e = ftp_cmd(conn, "%s %.*s", oper, filenamelen, filename); |
| 782 | if (e != FTP_CONNECTION_ALREADY_OPEN && e != FTP_OPEN_DATA_CONNECTION) |
| 783 | goto ouch; |
| 784 | |
| 785 | } else { |
| 786 | u_int32_t a; |
| 787 | u_short p; |
| 788 | int arg, d; |
| 789 | char *ap; |
| 790 | char hname[INET6_ADDRSTRLEN]; |
| 791 | |
| 792 | switch (sa.ss_family) { |
| 793 | case AF_INET6: |
| 794 | ((struct sockaddr_in6 *)&sa)->sin6_port = 0; |
| 795 | #ifdef IPV6_PORTRANGE |
| 796 | arg = low ? IPV6_PORTRANGE_DEFAULT : IPV6_PORTRANGE_HIGH; |
| 797 | if (setsockopt(sd, IPPROTO_IPV6, IPV6_PORTRANGE, |
| 798 | (char *)&arg, sizeof(arg)) == -1) |
| 799 | goto sysouch; |
| 800 | #endif |
| 801 | break; |
| 802 | case AF_INET: |
| 803 | ((struct sockaddr_in *)&sa)->sin_port = 0; |
| 804 | arg = low ? IP_PORTRANGE_DEFAULT : IP_PORTRANGE_HIGH; |
| 805 | if (setsockopt(sd, IPPROTO_IP, IP_PORTRANGE, |
| 806 | (char *)&arg, sizeof(arg)) == -1) |
| 807 | goto sysouch; |
| 808 | break; |
| 809 | } |
| 810 | if (verbose) |
| 811 | fetch_info("binding data socket"); |
| 812 | if (bind(sd, (struct sockaddr *)&sa, sa.ss_len) == -1) |
| 813 | goto sysouch; |
| 814 | if (listen(sd, 1) == -1) |
| 815 | goto sysouch; |
| 816 | |
| 817 | /* find what port we're on and tell the server */ |
| 818 | if (getsockname(sd, (struct sockaddr *)&sa, &l) == -1) |
| 819 | goto sysouch; |
| 820 | switch (sa.ss_family) { |
| 821 | case AF_INET: |
| 822 | sin4 = (struct sockaddr_in *)&sa; |
| 823 | a = ntohl(sin4->sin_addr.s_addr); |
| 824 | p = ntohs(sin4->sin_port); |
| 825 | e = ftp_cmd(conn, "PORT %d,%d,%d,%d,%d,%d", |
| 826 | (a >> 24) & 0xff, (a >> 16) & 0xff, |
| 827 | (a >> 8) & 0xff, a & 0xff, |
| 828 | (p >> 8) & 0xff, p & 0xff); |
| 829 | break; |
| 830 | case AF_INET6: |
| 831 | #define UC(b) (((int)b)&0xff) |
| 832 | e = -1; |
| 833 | sin6 = (struct sockaddr_in6 *)&sa; |
| 834 | sin6->sin6_scope_id = 0; |
| 835 | if (getnameinfo((struct sockaddr *)&sa, sa.ss_len, |
| 836 | hname, sizeof(hname), |
| 837 | NULL, 0, NI_NUMERICHOST) == 0) { |
| 838 | e = ftp_cmd(conn, "EPRT |%d|%s|%d|", 2, hname, |
| 839 | htons(sin6->sin6_port)); |
| 840 | if (e == -1) |
| 841 | goto ouch; |
| 842 | } |
| 843 | if (e != FTP_OK) { |
| 844 | ap = (char *)&sin6->sin6_addr; |
| 845 | e = ftp_cmd(conn, |
| 846 | "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d", |
| 847 | 6, 16, |
| 848 | UC(ap[0]), UC(ap[1]), UC(ap[2]), UC(ap[3]), |
| 849 | UC(ap[4]), UC(ap[5]), UC(ap[6]), UC(ap[7]), |
| 850 | UC(ap[8]), UC(ap[9]), UC(ap[10]), UC(ap[11]), |
| 851 | UC(ap[12]), UC(ap[13]), UC(ap[14]), UC(ap[15]), |
| 852 | 2, |
| 853 | (ntohs(sin6->sin6_port) >> 8) & 0xff, |
| 854 | ntohs(sin6->sin6_port) & 0xff); |
| 855 | } |
| 856 | break; |
| 857 | default: |
| 858 | e = FTP_PROTOCOL_ERROR; /* XXX: error code should be prepared */ |
| 859 | goto ouch; |
| 860 | } |
| 861 | if (e != FTP_OK) |
| 862 | goto ouch; |
| 863 | |
| 864 | /* seek to required offset */ |
| 865 | if (offset) |
| 866 | if (ftp_cmd(conn, "REST %ju", (uintmax_t)offset) != FTP_FILE_OK) |
| 867 | goto sysouch; |
| 868 | |
| 869 | /* make the server initiate the transfer */ |
| 870 | if (verbose) |
| 871 | fetch_info("initiating transfer"); |
| 872 | e = ftp_cmd(conn, "%s %.*s", oper, filenamelen, filename); |
| 873 | if (e != FTP_CONNECTION_ALREADY_OPEN && e != FTP_OPEN_DATA_CONNECTION) |
| 874 | goto ouch; |
| 875 | |
| 876 | /* accept the incoming connection and go to town */ |
| 877 | if ((d = accept(sd, NULL, NULL)) == -1) |
| 878 | goto sysouch; |
| 879 | close(sd); |
| 880 | sd = d; |
| 881 | } |
| 882 | |
| 883 | if ((df = ftp_setup(conn, fetch_reopen(sd), mode)) == NULL) |
| 884 | goto sysouch; |
| 885 | return (df); |
| 886 | |
| 887 | sysouch: |
| 888 | fetch_syserr(); |
| 889 | if (sd >= 0) |
| 890 | close(sd); |
| 891 | return (NULL); |
| 892 | |
| 893 | ouch: |
| 894 | if (e != -1) |
| 895 | ftp_seterr(e); |
| 896 | if (sd >= 0) |
| 897 | close(sd); |
| 898 | return (NULL); |
| 899 | } |
| 900 | |
| 901 | /* |
| 902 | * Authenticate |
| 903 | */ |
| 904 | static int |
| 905 | ftp_authenticate(conn_t *conn, struct url *url, struct url *purl) |
| 906 | { |
| 907 | const char *user, *pwd, *logname; |
| 908 | char pbuf[MAXHOSTNAMELEN + MAXLOGNAME + 1]; |
| 909 | int e, len; |
| 910 | |
| 911 | /* XXX FTP_AUTH, and maybe .netrc */ |
| 912 | |
| 913 | /* send user name and password */ |
| 914 | if (url->user[0] == '\0') |
| 915 | fetch_netrc_auth(url); |
| 916 | user = url->user; |
| 917 | if (*user == '\0') |
| 918 | if ((user = getenv("FTP_LOGIN")) != NULL) |
| 919 | DEBUGF("FTP_LOGIN=%s\n", user); |
| 920 | if (user == NULL || *user == '\0') |
| 921 | user = FTP_ANONYMOUS_USER; |
| 922 | if (purl && url->port == fetch_default_port(url->scheme)) |
| 923 | e = ftp_cmd(conn, "USER %s@%s", user, url->host); |
| 924 | else if (purl) |
| 925 | e = ftp_cmd(conn, "USER %s@%s@%d", user, url->host, url->port); |
| 926 | else |
| 927 | e = ftp_cmd(conn, "USER %s", user); |
| 928 | |
| 929 | /* did the server request a password? */ |
| 930 | if (e == FTP_NEED_PASSWORD) { |
| 931 | pwd = url->pwd; |
| 932 | if (*pwd == '\0') |
| 933 | if ((pwd = getenv("FTP_PASSWORD")) != NULL) |
| 934 | DEBUGF("FTP_PASSWORD=%s\n", pwd); |
| 935 | if (pwd == NULL || *pwd == '\0') { |
| 936 | if ((logname = getlogin()) == NULL) |
| 937 | logname = FTP_ANONYMOUS_USER; |
| 938 | if ((len = snprintf(pbuf, MAXLOGNAME + 1, "%s@", logname)) < 0) |
| 939 | len = 0; |
| 940 | else if (len > MAXLOGNAME) |
| 941 | len = MAXLOGNAME; |
| 942 | gethostname(pbuf + len, sizeof(pbuf) - len); |
| 943 | pwd = pbuf; |
| 944 | } |
| 945 | e = ftp_cmd(conn, "PASS %s", pwd); |
| 946 | } |
| 947 | |
| 948 | return (e); |
| 949 | } |
| 950 | |
| 951 | /* |
| 952 | * Log on to FTP server |
| 953 | */ |
| 954 | static conn_t * |
| 955 | ftp_connect(struct url *url, struct url *purl, const char *flags) |
| 956 | { |
| 957 | conn_t *conn; |
| 958 | int e, direct, verbose; |
| 959 | #ifdef INET6 |
| 960 | int af = AF_UNSPEC; |
| 961 | #else |
| 962 | int af = AF_INET; |
| 963 | #endif |
| 964 | |
| 965 | direct = CHECK_FLAG('d'); |
| 966 | verbose = CHECK_FLAG('v'); |
| 967 | if (CHECK_FLAG('4')) |
| 968 | af = AF_INET; |
| 969 | else if (CHECK_FLAG('6')) |
| 970 | af = AF_INET6; |
| 971 | |
| 972 | if (direct) |
| 973 | purl = NULL; |
| 974 | |
| 975 | /* check for proxy */ |
| 976 | if (purl) { |
| 977 | /* XXX proxy authentication! */ |
| 978 | conn = fetch_connect(purl->host, purl->port, af, verbose); |
| 979 | } else { |
| 980 | /* no proxy, go straight to target */ |
| 981 | conn = fetch_connect(url->host, url->port, af, verbose); |
| 982 | purl = NULL; |
| 983 | } |
| 984 | |
| 985 | /* check connection */ |
| 986 | if (conn == NULL) |
| 987 | /* fetch_connect() has already set an error code */ |
| 988 | return (NULL); |
| 989 | |
| 990 | /* expect welcome message */ |
| 991 | if ((e = ftp_chkerr(conn)) != FTP_SERVICE_READY) |
| 992 | goto fouch; |
| 993 | |
| 994 | /* authenticate */ |
| 995 | if ((e = ftp_authenticate(conn, url, purl)) != FTP_LOGGED_IN) |
| 996 | goto fouch; |
| 997 | |
| 998 | /* TODO: Request extended features supported, if any (RFC 3659). */ |
| 999 | |
| 1000 | /* done */ |
| 1001 | return (conn); |
| 1002 | |
| 1003 | fouch: |
| 1004 | if (e != -1) |
| 1005 | ftp_seterr(e); |
| 1006 | fetch_close(conn); |
| 1007 | return (NULL); |
| 1008 | } |
| 1009 | |
| 1010 | /* |
| 1011 | * Disconnect from server |
| 1012 | */ |
| 1013 | static void |
| 1014 | ftp_disconnect(conn_t *conn) |
| 1015 | { |
| 1016 | (void)ftp_cmd(conn, "QUIT"); |
| 1017 | if (conn == cached_connection && conn->ref == 1) |
| 1018 | cached_connection = NULL; |
| 1019 | fetch_close(conn); |
| 1020 | } |
| 1021 | |
| 1022 | /* |
| 1023 | * Check if we're already connected |
| 1024 | */ |
| 1025 | static int |
| 1026 | ftp_isconnected(struct url *url) |
| 1027 | { |
| 1028 | return (cached_connection |
| 1029 | && (strcmp(url->host, cached_host.host) == 0) |
| 1030 | && (strcmp(url->user, cached_host.user) == 0) |
| 1031 | && (strcmp(url->pwd, cached_host.pwd) == 0) |
| 1032 | && (url->port == cached_host.port)); |
| 1033 | } |
| 1034 | |
| 1035 | /* |
| 1036 | * Check the cache, reconnect if no luck |
| 1037 | */ |
| 1038 | static conn_t * |
| 1039 | ftp_cached_connect(struct url *url, struct url *purl, const char *flags) |
| 1040 | { |
| 1041 | conn_t *conn; |
| 1042 | int e; |
| 1043 | |
| 1044 | /* set default port */ |
| 1045 | if (!url->port) |
| 1046 | url->port = fetch_default_port(url->scheme); |
| 1047 | |
| 1048 | /* try to use previously cached connection */ |
| 1049 | if (ftp_isconnected(url)) { |
| 1050 | e = ftp_cmd(cached_connection, "NOOP"); |
| 1051 | if (e == FTP_OK || e == FTP_SYNTAX_ERROR) |
| 1052 | return (fetch_ref(cached_connection)); |
| 1053 | } |
| 1054 | |
| 1055 | /* connect to server */ |
| 1056 | if ((conn = ftp_connect(url, purl, flags)) == NULL) |
| 1057 | return (NULL); |
| 1058 | if (cached_connection) |
| 1059 | ftp_disconnect(cached_connection); |
| 1060 | cached_connection = fetch_ref(conn); |
| 1061 | memcpy(&cached_host, url, sizeof(*url)); |
| 1062 | return (conn); |
| 1063 | } |
| 1064 | |
| 1065 | /* |
| 1066 | * Check the proxy settings |
| 1067 | */ |
| 1068 | static struct url * |
| 1069 | ftp_get_proxy(struct url * url, const char *flags) |
| 1070 | { |
| 1071 | struct url *purl; |
| 1072 | char *p; |
| 1073 | |
| 1074 | if (flags != NULL && strchr(flags, 'd') != NULL) |
| 1075 | return (NULL); |
| 1076 | if (fetch_no_proxy_match(url->host)) |
| 1077 | return (NULL); |
| 1078 | if (((p = getenv("FTP_PROXY")) || (p = getenv("ftp_proxy")) || |
| 1079 | (p = getenv("HTTP_PROXY")) || (p = getenv("http_proxy"))) && |
| 1080 | *p && (purl = fetchParseURL(p)) != NULL) { |
| 1081 | if (!*purl->scheme) { |
| 1082 | if (getenv("FTP_PROXY") || getenv("ftp_proxy")) |
| 1083 | strcpy(purl->scheme, SCHEME_FTP); |
| 1084 | else |
| 1085 | strcpy(purl->scheme, SCHEME_HTTP); |
| 1086 | } |
| 1087 | if (!purl->port) |
| 1088 | purl->port = fetch_default_proxy_port(purl->scheme); |
| 1089 | if (strcmp(purl->scheme, SCHEME_FTP) == 0 || |
| 1090 | strcmp(purl->scheme, SCHEME_HTTP) == 0) |
| 1091 | return (purl); |
| 1092 | fetchFreeURL(purl); |
| 1093 | } |
| 1094 | return (NULL); |
| 1095 | } |
| 1096 | |
| 1097 | /* |
| 1098 | * Process an FTP request |
| 1099 | */ |
| 1100 | FILE * |
| 1101 | ftp_request(struct url *url, const char *op, struct url_stat *us, |
| 1102 | struct url *purl, const char *flags) |
| 1103 | { |
| 1104 | conn_t *conn; |
| 1105 | int oflag; |
| 1106 | |
| 1107 | /* check if we should use HTTP instead */ |
| 1108 | if (purl && (strcmp(purl->scheme, SCHEME_HTTP) == 0 || |
| 1109 | strcmp(purl->scheme, SCHEME_HTTPS) == 0)) { |
| 1110 | if (strcmp(op, "STAT") == 0) |
| 1111 | return (http_request(url, "HEAD", us, purl, flags)); |
| 1112 | else if (strcmp(op, "RETR") == 0) |
| 1113 | return (http_request(url, "GET", us, purl, flags)); |
| 1114 | /* |
| 1115 | * Our HTTP code doesn't support PUT requests yet, so try |
| 1116 | * a direct connection. |
| 1117 | */ |
| 1118 | } |
| 1119 | |
| 1120 | /* connect to server */ |
| 1121 | conn = ftp_cached_connect(url, purl, flags); |
| 1122 | if (purl) |
| 1123 | fetchFreeURL(purl); |
| 1124 | if (conn == NULL) |
| 1125 | return (NULL); |
| 1126 | |
| 1127 | /* change directory */ |
| 1128 | if (ftp_cwd(conn, url->doc) == -1) |
| 1129 | goto errsock; |
| 1130 | |
| 1131 | /* stat file */ |
| 1132 | if (us && ftp_stat(conn, url->doc, us) == -1 |
| 1133 | && fetchLastErrCode != FETCH_PROTO |
| 1134 | && fetchLastErrCode != FETCH_UNAVAIL) |
| 1135 | goto errsock; |
| 1136 | |
| 1137 | /* just a stat */ |
| 1138 | if (strcmp(op, "STAT") == 0) { |
| 1139 | --conn->ref; |
| 1140 | ftp_disconnect(conn); |
| 1141 | return (FILE *)1; /* bogus return value */ |
| 1142 | } |
| 1143 | if (strcmp(op, "STOR") == 0 || strcmp(op, "APPE") == 0) |
| 1144 | oflag = O_WRONLY; |
| 1145 | else |
| 1146 | oflag = O_RDONLY; |
| 1147 | |
| 1148 | /* initiate the transfer */ |
| 1149 | return (ftp_transfer(conn, op, url->doc, oflag, url->offset, flags)); |
| 1150 | |
| 1151 | errsock: |
| 1152 | ftp_disconnect(conn); |
| 1153 | return (NULL); |
| 1154 | } |
| 1155 | |
| 1156 | /* |
| 1157 | * Get and stat file |
| 1158 | */ |
| 1159 | FILE * |
| 1160 | fetchXGetFTP(struct url *url, struct url_stat *us, const char *flags) |
| 1161 | { |
| 1162 | return (ftp_request(url, "RETR", us, ftp_get_proxy(url, flags), flags)); |
| 1163 | } |
| 1164 | |
| 1165 | /* |
| 1166 | * Get file |
| 1167 | */ |
| 1168 | FILE * |
| 1169 | fetchGetFTP(struct url *url, const char *flags) |
| 1170 | { |
| 1171 | return (fetchXGetFTP(url, NULL, flags)); |
| 1172 | } |
| 1173 | |
| 1174 | /* |
| 1175 | * Put file |
| 1176 | */ |
| 1177 | FILE * |
| 1178 | fetchPutFTP(struct url *url, const char *flags) |
| 1179 | { |
| 1180 | return (ftp_request(url, CHECK_FLAG('a') ? "APPE" : "STOR", NULL, |
| 1181 | ftp_get_proxy(url, flags), flags)); |
| 1182 | } |
| 1183 | |
| 1184 | /* |
| 1185 | * Get file stats |
| 1186 | */ |
| 1187 | int |
| 1188 | fetchStatFTP(struct url *url, struct url_stat *us, const char *flags) |
| 1189 | { |
| 1190 | FILE *f; |
| 1191 | |
| 1192 | f = ftp_request(url, "STAT", us, ftp_get_proxy(url, flags), flags); |
| 1193 | if (f == NULL) |
| 1194 | return (-1); |
| 1195 | /* |
| 1196 | * When op is "STAT", ftp_request() will return either NULL or |
| 1197 | * (FILE *)1, never a valid FILE *, so we mustn't fclose(f) before |
| 1198 | * returning, as it would cause a segfault. |
| 1199 | */ |
| 1200 | return (0); |
| 1201 | } |
| 1202 | |
| 1203 | /* |
| 1204 | * List a directory |
| 1205 | */ |
| 1206 | struct url_ent * |
| 1207 | fetchListFTP(struct url *url __unused, const char *flags __unused) |
| 1208 | { |
| 1209 | warnx("fetchListFTP(): not implemented"); |
| 1210 | return (NULL); |
| 1211 | } |