ftp.c revision 174588
137535Sdes/*- 2135546Sdes * Copyright (c) 1998-2004 Dag-Erling Co�dan Sm�rgrav 337535Sdes * All rights reserved. 437535Sdes * 537535Sdes * Redistribution and use in source and binary forms, with or without 637535Sdes * modification, are permitted provided that the following conditions 737535Sdes * are met: 837535Sdes * 1. Redistributions of source code must retain the above copyright 937535Sdes * notice, this list of conditions and the following disclaimer 1037535Sdes * in this position and unchanged. 1137535Sdes * 2. Redistributions in binary form must reproduce the above copyright 1237535Sdes * notice, this list of conditions and the following disclaimer in the 1337535Sdes * documentation and/or other materials provided with the distribution. 1437535Sdes * 3. The name of the author may not be used to endorse or promote products 1537535Sdes * derived from this software without specific prior written permission 1637535Sdes * 1737535Sdes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1837535Sdes * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1937535Sdes * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2037535Sdes * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2137535Sdes * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2237535Sdes * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2337535Sdes * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2437535Sdes * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2537535Sdes * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2637535Sdes * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2737535Sdes */ 2837535Sdes 2984203Sdillon#include <sys/cdefs.h> 3084203Sdillon__FBSDID("$FreeBSD: head/lib/libfetch/ftp.c 174588 2007-12-14 10:26:58Z des $"); 3184203Sdillon 3237535Sdes/* 3337571Sdes * Portions of this code were taken from or based on ftpio.c: 3437535Sdes * 3537535Sdes * ---------------------------------------------------------------------------- 3637535Sdes * "THE BEER-WARE LICENSE" (Revision 42): 3793150Sphk * <phk@FreeBSD.org> wrote this file. As long as you retain this notice you 3837535Sdes * can do whatever you want with this stuff. If we meet some day, and you think 3937535Sdes * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp 4037535Sdes * ---------------------------------------------------------------------------- 4137535Sdes * 4237535Sdes * Major Changelog: 4337535Sdes * 4437535Sdes * Dag-Erling Co�dan Sm�rgrav 4537535Sdes * 9 Jun 1998 4637535Sdes * 4737535Sdes * Incorporated into libfetch 4837535Sdes * 4937535Sdes * Jordan K. Hubbard 5037535Sdes * 17 Jan 1996 5137535Sdes * 5237535Sdes * Turned inside out. Now returns xfers as new file ids, not as a special 5337535Sdes * `state' of FTP_t 5437535Sdes * 5537535Sdes * $ftpioId: ftpio.c,v 1.30 1998/04/11 07:28:53 phk Exp $ 5637535Sdes * 5737535Sdes */ 5837535Sdes 5941862Sdes#include <sys/param.h> 6037535Sdes#include <sys/socket.h> 6137535Sdes#include <netinet/in.h> 6237535Sdes 6337535Sdes#include <ctype.h> 6475891Sarchie#include <err.h> 6555557Sdes#include <errno.h> 6667430Sdes#include <fcntl.h> 6760188Sdes#include <netdb.h> 6837573Sdes#include <stdarg.h> 6997856Sdes#include <stdint.h> 7037535Sdes#include <stdio.h> 7137571Sdes#include <stdlib.h> 7237535Sdes#include <string.h> 7341869Sdes#include <time.h> 7437571Sdes#include <unistd.h> 7537535Sdes 7637535Sdes#include "fetch.h" 7740939Sdes#include "common.h" 7841862Sdes#include "ftperr.h" 7937535Sdes 8070795Sdes#define FTP_ANONYMOUS_USER "anonymous" 8137535Sdes 8264883Sdes#define FTP_CONNECTION_ALREADY_OPEN 125 8337573Sdes#define FTP_OPEN_DATA_CONNECTION 150 8437573Sdes#define FTP_OK 200 8541869Sdes#define FTP_FILE_STATUS 213 8641863Sdes#define FTP_SERVICE_READY 220 8767890Sdes#define FTP_TRANSFER_COMPLETE 226 8837573Sdes#define FTP_PASSIVE_MODE 227 8960737Sume#define FTP_LPASSIVE_MODE 228 9060737Sume#define FTP_EPASSIVE_MODE 229 9137573Sdes#define FTP_LOGGED_IN 230 9237573Sdes#define FTP_FILE_ACTION_OK 250 93148986Sdes#define FTP_DIRECTORY_CREATED 257 /* multiple meanings */ 94148986Sdes#define FTP_FILE_CREATED 257 /* multiple meanings */ 95148986Sdes#define FTP_WORKING_DIRECTORY 257 /* multiple meanings */ 9637573Sdes#define FTP_NEED_PASSWORD 331 9737573Sdes#define FTP_NEED_ACCOUNT 332 9860188Sdes#define FTP_FILE_OK 350 9955557Sdes#define FTP_SYNTAX_ERROR 500 10063336Sdes#define FTP_PROTOCOL_ERROR 999 10137573Sdes 10240975Sdesstatic struct url cached_host; 10397856Sdesstatic conn_t *cached_connection; 10437535Sdes 10555557Sdes#define isftpreply(foo) (isdigit(foo[0]) && isdigit(foo[1]) \ 10660707Sdes && isdigit(foo[2]) \ 10790267Sdes && (foo[3] == ' ' || foo[3] == '\0')) 10855557Sdes#define isftpinfo(foo) (isdigit(foo[0]) && isdigit(foo[1]) \ 10955557Sdes && isdigit(foo[2]) && foo[3] == '-') 11055557Sdes 11190267Sdes/* 11290267Sdes * Translate IPv4 mapped IPv6 address to IPv4 address 11390267Sdes */ 11460737Sumestatic void 11560737Sumeunmappedaddr(struct sockaddr_in6 *sin6) 11660737Sume{ 11790267Sdes struct sockaddr_in *sin4; 11890267Sdes u_int32_t addr; 11990267Sdes int port; 12060737Sume 12190267Sdes if (sin6->sin6_family != AF_INET6 || 12290267Sdes !IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 12390267Sdes return; 12490267Sdes sin4 = (struct sockaddr_in *)sin6; 12590267Sdes addr = *(u_int32_t *)&sin6->sin6_addr.s6_addr[12]; 12690267Sdes port = sin6->sin6_port; 12790267Sdes memset(sin4, 0, sizeof(struct sockaddr_in)); 12890267Sdes sin4->sin_addr.s_addr = addr; 12990267Sdes sin4->sin_port = port; 13090267Sdes sin4->sin_family = AF_INET; 13190267Sdes sin4->sin_len = sizeof(struct sockaddr_in); 13260737Sume} 13360737Sume 13437571Sdes/* 13555557Sdes * Get server response 13637535Sdes */ 13737535Sdesstatic int 138174588Sdesftp_chkerr(conn_t *conn) 13937535Sdes{ 140174588Sdes if (fetch_getln(conn) == -1) { 141174588Sdes fetch_syserr(); 14290267Sdes return (-1); 14362215Sdes } 14497856Sdes if (isftpinfo(conn->buf)) { 14597856Sdes while (conn->buflen && !isftpreply(conn->buf)) { 146174588Sdes if (fetch_getln(conn) == -1) { 147174588Sdes fetch_syserr(); 14890267Sdes return (-1); 14990267Sdes } 15090267Sdes } 15190267Sdes } 15255557Sdes 15397856Sdes while (conn->buflen && isspace(conn->buf[conn->buflen - 1])) 15497856Sdes conn->buflen--; 15597856Sdes conn->buf[conn->buflen] = '\0'; 15637535Sdes 15797856Sdes if (!isftpreply(conn->buf)) { 158174588Sdes ftp_seterr(FTP_PROTOCOL_ERROR); 15990267Sdes return (-1); 16090267Sdes } 16155557Sdes 16297856Sdes conn->err = (conn->buf[0] - '0') * 100 16397856Sdes + (conn->buf[1] - '0') * 10 16497856Sdes + (conn->buf[2] - '0'); 16590267Sdes 16697856Sdes return (conn->err); 16737535Sdes} 16837535Sdes 16937535Sdes/* 17037573Sdes * Send a command and check reply 17137535Sdes */ 17237535Sdesstatic int 173174588Sdesftp_cmd(conn_t *conn, const char *fmt, ...) 17437535Sdes{ 17590267Sdes va_list ap; 17690267Sdes size_t len; 17790267Sdes char *msg; 17890267Sdes int r; 17937573Sdes 18090267Sdes va_start(ap, fmt); 18190267Sdes len = vasprintf(&msg, fmt, ap); 18290267Sdes va_end(ap); 18390267Sdes 18490267Sdes if (msg == NULL) { 18590267Sdes errno = ENOMEM; 186174588Sdes fetch_syserr(); 18790267Sdes return (-1); 18890267Sdes } 18990267Sdes 190174588Sdes r = fetch_putln(conn, msg, len); 19190267Sdes free(msg); 19290267Sdes 19390267Sdes if (r == -1) { 194174588Sdes fetch_syserr(); 19590267Sdes return (-1); 19690267Sdes } 19790267Sdes 198174588Sdes return (ftp_chkerr(conn)); 19937535Sdes} 20037535Sdes 20137535Sdes/* 20263340Sdes * Return a pointer to the filename part of a path 20363340Sdes */ 20475891Sarchiestatic const char * 205174588Sdesftp_filename(const char *file, int *len, int *type) 20663340Sdes{ 207148986Sdes const char *s; 20890267Sdes 20990267Sdes if ((s = strrchr(file, '/')) == NULL) 210148986Sdes s = file; 21190267Sdes else 212148986Sdes s = s + 1; 213148986Sdes *len = strlen(s); 214148986Sdes if (*len > 7 && strncmp(s + *len - 7, ";type=", 6) == 0) { 215148986Sdes *type = s[*len - 1]; 216148986Sdes *len -= 7; 217148986Sdes } else { 218148986Sdes *type = '\0'; 219148986Sdes } 220148986Sdes return (s); 22163340Sdes} 22263340Sdes 22363340Sdes/* 224148986Sdes * Get current working directory from the reply to a CWD, PWD or CDUP 225148986Sdes * command. 226148986Sdes */ 227148986Sdesstatic int 228174588Sdesftp_pwd(conn_t *conn, char *pwd, size_t pwdlen) 229148986Sdes{ 230148986Sdes char *src, *dst, *end; 231148986Sdes int q; 232148986Sdes 233148986Sdes if (conn->err != FTP_WORKING_DIRECTORY && 234148986Sdes conn->err != FTP_FILE_ACTION_OK) 235148986Sdes return (FTP_PROTOCOL_ERROR); 236148986Sdes end = conn->buf + conn->buflen; 237148986Sdes src = conn->buf + 4; 238148986Sdes if (src >= end || *src++ != '"') 239148986Sdes return (FTP_PROTOCOL_ERROR); 240148986Sdes for (q = 0, dst = pwd; src < end && pwdlen--; ++src) { 241148986Sdes if (!q && *src == '"') 242148986Sdes q = 1; 243148986Sdes else if (q && *src != '"') 244148986Sdes break; 245148986Sdes else if (q) 246148986Sdes *dst++ = '"', q = 0; 247148986Sdes else 248148986Sdes *dst++ = *src; 249148986Sdes } 250148986Sdes if (!pwdlen) 251148986Sdes return (FTP_PROTOCOL_ERROR); 252148986Sdes *dst = '\0'; 253148986Sdes#if 0 254148986Sdes DEBUG(fprintf(stderr, "pwd: [%s]\n", pwd)); 255148986Sdes#endif 256148986Sdes return (FTP_OK); 257148986Sdes} 258148986Sdes 259148986Sdes/* 26090267Sdes * Change working directory to the directory that contains the specified 26190267Sdes * file. 26263340Sdes */ 26363340Sdesstatic int 264174588Sdesftp_cwd(conn_t *conn, const char *file) 26563340Sdes{ 266148986Sdes const char *beg, *end; 267148986Sdes char pwd[PATH_MAX]; 268148986Sdes int e, i, len; 26963340Sdes 270168960Snjl /* If no slashes in name, no need to change dirs. */ 271148986Sdes if ((end = strrchr(file, '/')) == NULL) 272148986Sdes return (0); 273174588Sdes if ((e = ftp_cmd(conn, "PWD")) != FTP_WORKING_DIRECTORY || 274174588Sdes (e = ftp_pwd(conn, pwd, sizeof(pwd))) != FTP_OK) { 275174588Sdes ftp_seterr(e); 27690267Sdes return (-1); 27790267Sdes } 278148986Sdes for (;;) { 279148986Sdes len = strlen(pwd); 280168960Snjl 281168960Snjl /* Look for a common prefix between PWD and dir to fetch. */ 282148986Sdes for (i = 0; i <= len && i <= end - file; ++i) 283148986Sdes if (pwd[i] != file[i]) 284148986Sdes break; 285148986Sdes#if 0 286148986Sdes DEBUG(fprintf(stderr, "have: [%.*s|%s]\n", i, pwd, pwd + i)); 287148986Sdes DEBUG(fprintf(stderr, "want: [%.*s|%s]\n", i, file, file + i)); 288148986Sdes#endif 289168960Snjl /* Keep going up a dir until we have a matching prefix. */ 290148986Sdes if (pwd[i] == '\0' && (file[i - 1] == '/' || file[i] == '/')) 291148986Sdes break; 292174588Sdes if ((e = ftp_cmd(conn, "CDUP")) != FTP_FILE_ACTION_OK || 293174588Sdes (e = ftp_cmd(conn, "PWD")) != FTP_WORKING_DIRECTORY || 294174588Sdes (e = ftp_pwd(conn, pwd, sizeof(pwd))) != FTP_OK) { 295174588Sdes ftp_seterr(e); 296148986Sdes return (-1); 297148986Sdes } 298148986Sdes } 299168960Snjl 300168960Snjl#ifdef FTP_COMBINE_CWDS 301168960Snjl /* Skip leading slashes, even "////". */ 302168960Snjl for (beg = file + i; beg < end && *beg == '/'; ++beg, ++i) 303168960Snjl /* nothing */ ; 304168960Snjl 305168960Snjl /* If there is no trailing dir, we're already there. */ 306168960Snjl if (beg >= end) 307168960Snjl return (0); 308168960Snjl 309168960Snjl /* Change to the directory all in one chunk (e.g., foo/bar/baz). */ 310174588Sdes e = ftp_cmd(conn, "CWD %.*s", (int)(end - beg), beg); 311168960Snjl if (e == FTP_FILE_ACTION_OK) 312168960Snjl return (0); 313168960Snjl#endif /* FTP_COMBINE_CWDS */ 314168960Snjl 315168960Snjl /* That didn't work so go back to legacy behavior (multiple CWDs). */ 316148986Sdes for (beg = file + i; beg < end; beg = file + i + 1) { 317159565Sdes while (*beg == '/') 318159565Sdes ++beg, ++i; 319148986Sdes for (++i; file + i < end && file[i] != '/'; ++i) 320148986Sdes /* nothing */ ; 321174588Sdes e = ftp_cmd(conn, "CWD %.*s", file + i - beg, beg); 322148986Sdes if (e != FTP_FILE_ACTION_OK) { 323174588Sdes ftp_seterr(e); 324148986Sdes return (-1); 325148986Sdes } 326148986Sdes } 32790267Sdes return (0); 32863340Sdes} 32963340Sdes 33063340Sdes/* 331148986Sdes * Set transfer mode and data type 332148986Sdes */ 333148986Sdesstatic int 334174588Sdesftp_mode_type(conn_t *conn, int mode, int type) 335148986Sdes{ 336148986Sdes int e; 337148986Sdes 338148986Sdes switch (mode) { 339148986Sdes case 0: 340148986Sdes case 's': 341148986Sdes mode = 'S'; 342148986Sdes case 'S': 343148986Sdes break; 344148986Sdes default: 345148986Sdes return (FTP_PROTOCOL_ERROR); 346148986Sdes } 347174588Sdes if ((e = ftp_cmd(conn, "MODE %c", mode)) != FTP_OK) { 348154550Sdes if (mode == 'S') { 349154550Sdes /* 350154550Sdes * Stream mode is supposed to be the default - so 351154550Sdes * much so that some servers not only do not 352154550Sdes * support any other mode, but do not support the 353154550Sdes * MODE command at all. 354154550Sdes * 355154550Sdes * If "MODE S" fails, it is unlikely that we 356154550Sdes * previously succeeded in setting a different 357154550Sdes * mode. Therefore, we simply hope that the 358154550Sdes * server is already in the correct mode, and 359154550Sdes * silently ignore the failure. 360154550Sdes */ 361154550Sdes } else { 362154550Sdes return (e); 363154550Sdes } 364154550Sdes } 365148986Sdes 366148986Sdes switch (type) { 367148986Sdes case 0: 368148986Sdes case 'i': 369148986Sdes type = 'I'; 370148986Sdes case 'I': 371148986Sdes break; 372148986Sdes case 'a': 373148986Sdes type = 'A'; 374148986Sdes case 'A': 375148986Sdes break; 376148986Sdes case 'd': 377148986Sdes type = 'D'; 378148986Sdes case 'D': 379148986Sdes /* can't handle yet */ 380148986Sdes default: 381148986Sdes return (FTP_PROTOCOL_ERROR); 382148986Sdes } 383174588Sdes if ((e = ftp_cmd(conn, "TYPE %c", type)) != FTP_OK) 384148986Sdes return (e); 385148986Sdes 386148986Sdes return (FTP_OK); 387148986Sdes} 388148986Sdes 389148986Sdes/* 39063340Sdes * Request and parse file stats 39163340Sdes */ 39263340Sdesstatic int 393174588Sdesftp_stat(conn_t *conn, const char *file, struct url_stat *us) 39463340Sdes{ 39590267Sdes char *ln; 396148986Sdes const char *filename; 397148986Sdes int filenamelen, type; 39890267Sdes struct tm tm; 39990267Sdes time_t t; 40090267Sdes int e; 40163340Sdes 40275292Sdes us->size = -1; 40390267Sdes us->atime = us->mtime = 0; 40463340Sdes 405174588Sdes filename = ftp_filename(file, &filenamelen, &type); 40690267Sdes 407174588Sdes if ((e = ftp_mode_type(conn, 0, type)) != FTP_OK) { 408174588Sdes ftp_seterr(e); 40990267Sdes return (-1); 41090267Sdes } 411148986Sdes 412174588Sdes e = ftp_cmd(conn, "SIZE %.*s", filenamelen, filename); 413148986Sdes if (e != FTP_FILE_STATUS) { 414174588Sdes ftp_seterr(e); 415148986Sdes return (-1); 416148986Sdes } 41797856Sdes for (ln = conn->buf + 4; *ln && isspace(*ln); ln++) 41890267Sdes /* nothing */ ; 41990267Sdes for (us->size = 0; *ln && isdigit(*ln); ln++) 42090267Sdes us->size = us->size * 10 + *ln - '0'; 42190267Sdes if (*ln && !isspace(*ln)) { 422174588Sdes ftp_seterr(FTP_PROTOCOL_ERROR); 42390267Sdes us->size = -1; 42490267Sdes return (-1); 42590267Sdes } 42690267Sdes if (us->size == 0) 42790267Sdes us->size = -1; 42890267Sdes DEBUG(fprintf(stderr, "size: [%lld]\n", (long long)us->size)); 42990267Sdes 430174588Sdes e = ftp_cmd(conn, "MDTM %.*s", filenamelen, filename); 431148986Sdes if (e != FTP_FILE_STATUS) { 432174588Sdes ftp_seterr(e); 43390267Sdes return (-1); 43490267Sdes } 43597856Sdes for (ln = conn->buf + 4; *ln && isspace(*ln); ln++) 43690267Sdes /* nothing */ ; 43790267Sdes switch (strspn(ln, "0123456789")) { 43890267Sdes case 14: 43990267Sdes break; 44090267Sdes case 15: 44190267Sdes ln++; 44290267Sdes ln[0] = '2'; 44390267Sdes ln[1] = '0'; 44490267Sdes break; 44590267Sdes default: 446174588Sdes ftp_seterr(FTP_PROTOCOL_ERROR); 44790267Sdes return (-1); 44890267Sdes } 44990267Sdes if (sscanf(ln, "%04d%02d%02d%02d%02d%02d", 45090267Sdes &tm.tm_year, &tm.tm_mon, &tm.tm_mday, 45190267Sdes &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) { 452174588Sdes ftp_seterr(FTP_PROTOCOL_ERROR); 45390267Sdes return (-1); 45490267Sdes } 45590267Sdes tm.tm_mon--; 45690267Sdes tm.tm_year -= 1900; 45790267Sdes tm.tm_isdst = -1; 45890267Sdes t = timegm(&tm); 45990267Sdes if (t == (time_t)-1) 46090267Sdes t = time(NULL); 46190267Sdes us->mtime = t; 46290267Sdes us->atime = t; 46390267Sdes DEBUG(fprintf(stderr, 46490267Sdes "last modified: [%04d-%02d-%02d %02d:%02d:%02d]\n", 46590267Sdes tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, 46690267Sdes tm.tm_hour, tm.tm_min, tm.tm_sec)); 46790267Sdes return (0); 46863340Sdes} 46963340Sdes 47063340Sdes/* 47167430Sdes * I/O functions for FTP 47267430Sdes */ 47367430Sdesstruct ftpio { 47497866Sdes conn_t *cconn; /* Control connection */ 47597866Sdes conn_t *dconn; /* Data connection */ 47690267Sdes int dir; /* Direction */ 47790267Sdes int eof; /* EOF reached */ 47890267Sdes int err; /* Error code */ 47967430Sdes}; 48067430Sdes 481174588Sdesstatic int ftp_readfn(void *, char *, int); 482174588Sdesstatic int ftp_writefn(void *, const char *, int); 483174588Sdesstatic fpos_t ftp_seekfn(void *, fpos_t, int); 484174588Sdesstatic int ftp_closefn(void *); 48567430Sdes 48667430Sdesstatic int 487174588Sdesftp_readfn(void *v, char *buf, int len) 48867430Sdes{ 48990267Sdes struct ftpio *io; 49090267Sdes int r; 49167430Sdes 49290267Sdes io = (struct ftpio *)v; 49390267Sdes if (io == NULL) { 49490267Sdes errno = EBADF; 49590267Sdes return (-1); 49690267Sdes } 49797866Sdes if (io->cconn == NULL || io->dconn == NULL || io->dir == O_WRONLY) { 49890267Sdes errno = EBADF; 49990267Sdes return (-1); 50090267Sdes } 50190267Sdes if (io->err) { 50290267Sdes errno = io->err; 50390267Sdes return (-1); 50490267Sdes } 50590267Sdes if (io->eof) 50690267Sdes return (0); 507174588Sdes r = fetch_read(io->dconn, buf, len); 50890267Sdes if (r > 0) 50990267Sdes return (r); 51090267Sdes if (r == 0) { 51190267Sdes io->eof = 1; 51290267Sdes return (0); 51390267Sdes } 51490267Sdes if (errno != EINTR) 51590267Sdes io->err = errno; 51690267Sdes return (-1); 51767430Sdes} 51867430Sdes 51967430Sdesstatic int 520174588Sdesftp_writefn(void *v, const char *buf, int len) 52167430Sdes{ 52290267Sdes struct ftpio *io; 52390267Sdes int w; 52490267Sdes 52590267Sdes io = (struct ftpio *)v; 52690267Sdes if (io == NULL) { 52790267Sdes errno = EBADF; 52890267Sdes return (-1); 52990267Sdes } 53097866Sdes if (io->cconn == NULL || io->dconn == NULL || io->dir == O_RDONLY) { 53190267Sdes errno = EBADF; 53290267Sdes return (-1); 53390267Sdes } 53490267Sdes if (io->err) { 53590267Sdes errno = io->err; 53690267Sdes return (-1); 53790267Sdes } 538174588Sdes w = fetch_write(io->dconn, buf, len); 53990267Sdes if (w >= 0) 54090267Sdes return (w); 54190267Sdes if (errno != EINTR) 54290267Sdes io->err = errno; 54390267Sdes return (-1); 54467430Sdes} 54567430Sdes 54667430Sdesstatic fpos_t 547174588Sdesftp_seekfn(void *v, fpos_t pos __unused, int whence __unused) 54867430Sdes{ 54990267Sdes struct ftpio *io; 55090267Sdes 55190267Sdes io = (struct ftpio *)v; 55290267Sdes if (io == NULL) { 55390267Sdes errno = EBADF; 55490267Sdes return (-1); 55590267Sdes } 55690267Sdes errno = ESPIPE; 55790267Sdes return (-1); 55867430Sdes} 55967430Sdes 56067430Sdesstatic int 561174588Sdesftp_closefn(void *v) 56267430Sdes{ 56390267Sdes struct ftpio *io; 56490267Sdes int r; 56567430Sdes 56690267Sdes io = (struct ftpio *)v; 56790267Sdes if (io == NULL) { 56890267Sdes errno = EBADF; 56990267Sdes return (-1); 57090267Sdes } 57190267Sdes if (io->dir == -1) 57290267Sdes return (0); 57397866Sdes if (io->cconn == NULL || io->dconn == NULL) { 57490267Sdes errno = EBADF; 57590267Sdes return (-1); 57690267Sdes } 577174588Sdes fetch_close(io->dconn); 57890267Sdes io->dir = -1; 57997866Sdes io->dconn = NULL; 58090267Sdes DEBUG(fprintf(stderr, "Waiting for final status\n")); 581174588Sdes r = ftp_chkerr(io->cconn); 582105903Snjl if (io->cconn == cached_connection && io->cconn->ref == 1) 583105903Snjl cached_connection = NULL; 584174588Sdes fetch_close(io->cconn); 58590267Sdes free(io); 58690267Sdes return (r == FTP_TRANSFER_COMPLETE) ? 0 : -1; 58767430Sdes} 58867430Sdes 58967430Sdesstatic FILE * 590174588Sdesftp_setup(conn_t *cconn, conn_t *dconn, int mode) 59167430Sdes{ 59290267Sdes struct ftpio *io; 59390267Sdes FILE *f; 59467430Sdes 59597866Sdes if (cconn == NULL || dconn == NULL) 59697866Sdes return (NULL); 597109967Sdes if ((io = malloc(sizeof(*io))) == NULL) 59890267Sdes return (NULL); 59997866Sdes io->cconn = cconn; 60097866Sdes io->dconn = dconn; 60190267Sdes io->dir = mode; 60290267Sdes io->eof = io->err = 0; 603174588Sdes f = funopen(io, ftp_readfn, ftp_writefn, ftp_seekfn, ftp_closefn); 60490267Sdes if (f == NULL) 60590267Sdes free(io); 60690267Sdes return (f); 60767430Sdes} 60867430Sdes 60967430Sdes/* 61037608Sdes * Transfer file 61137535Sdes */ 61237535Sdesstatic FILE * 613174588Sdesftp_transfer(conn_t *conn, const char *oper, const char *file, 61490267Sdes int mode, off_t offset, const char *flags) 61537535Sdes{ 61690267Sdes struct sockaddr_storage sa; 61790267Sdes struct sockaddr_in6 *sin6; 61890267Sdes struct sockaddr_in *sin4; 619159566Sdes const char *bindaddr; 620148986Sdes const char *filename; 621148986Sdes int filenamelen, type; 62290267Sdes int low, pasv, verbose; 62390267Sdes int e, sd = -1; 62490267Sdes socklen_t l; 62590267Sdes char *s; 62690267Sdes FILE *df; 62755544Sdes 62890267Sdes /* check flags */ 62990267Sdes low = CHECK_FLAG('l'); 63090267Sdes pasv = CHECK_FLAG('p'); 63190267Sdes verbose = CHECK_FLAG('v'); 63255544Sdes 63390267Sdes /* passive mode */ 63490267Sdes if (!pasv) 63590267Sdes pasv = ((s = getenv("FTP_PASSIVE_MODE")) != NULL && 63690267Sdes strncasecmp(s, "no", 2) != 0); 63760951Sdes 638148986Sdes /* isolate filename */ 639174588Sdes filename = ftp_filename(file, &filenamelen, &type); 640148986Sdes 641148986Sdes /* set transfer mode and data type */ 642174588Sdes if ((e = ftp_mode_type(conn, 0, type)) != FTP_OK) 643148986Sdes goto ouch; 644148986Sdes 64590267Sdes /* find our own address, bind, and listen */ 646109967Sdes l = sizeof(sa); 64797856Sdes if (getsockname(conn->sd, (struct sockaddr *)&sa, &l) == -1) 64890267Sdes goto sysouch; 64990267Sdes if (sa.ss_family == AF_INET6) 65090267Sdes unmappedaddr((struct sockaddr_in6 *)&sa); 65160737Sume 65290267Sdes /* open data socket */ 65390267Sdes if ((sd = socket(sa.ss_family, SOCK_STREAM, IPPROTO_TCP)) == -1) { 654174588Sdes fetch_syserr(); 65590267Sdes return (NULL); 65660737Sume } 65737573Sdes 65890267Sdes if (pasv) { 65990267Sdes u_char addr[64]; 66090267Sdes char *ln, *p; 66190267Sdes unsigned int i; 66290267Sdes int port; 66337573Sdes 66490267Sdes /* send PASV command */ 66590267Sdes if (verbose) 666174588Sdes fetch_info("setting passive mode"); 66790267Sdes switch (sa.ss_family) { 66890267Sdes case AF_INET: 669174588Sdes if ((e = ftp_cmd(conn, "PASV")) != FTP_PASSIVE_MODE) 67090267Sdes goto ouch; 67190267Sdes break; 67290267Sdes case AF_INET6: 673174588Sdes if ((e = ftp_cmd(conn, "EPSV")) != FTP_EPASSIVE_MODE) { 67490267Sdes if (e == -1) 67590267Sdes goto ouch; 676174588Sdes if ((e = ftp_cmd(conn, "LPSV")) != 67797856Sdes FTP_LPASSIVE_MODE) 67890267Sdes goto ouch; 67990267Sdes } 68090267Sdes break; 68190267Sdes default: 68290267Sdes e = FTP_PROTOCOL_ERROR; /* XXX: error code should be prepared */ 68390267Sdes goto ouch; 68490267Sdes } 68537573Sdes 68690267Sdes /* 68790267Sdes * Find address and port number. The reply to the PASV command 68890267Sdes * is IMHO the one and only weak point in the FTP protocol. 68990267Sdes */ 69097856Sdes ln = conn->buf; 69190267Sdes switch (e) { 69290267Sdes case FTP_PASSIVE_MODE: 69390267Sdes case FTP_LPASSIVE_MODE: 69490267Sdes for (p = ln + 3; *p && !isdigit(*p); p++) 69590267Sdes /* nothing */ ; 69690267Sdes if (!*p) { 69790267Sdes e = FTP_PROTOCOL_ERROR; 69890267Sdes goto ouch; 69990267Sdes } 70090267Sdes l = (e == FTP_PASSIVE_MODE ? 6 : 21); 70190267Sdes for (i = 0; *p && i < l; i++, p++) 70290267Sdes addr[i] = strtol(p, &p, 10); 70390267Sdes if (i < l) { 70490267Sdes e = FTP_PROTOCOL_ERROR; 70590267Sdes goto ouch; 70690267Sdes } 70790267Sdes break; 70890267Sdes case FTP_EPASSIVE_MODE: 70990267Sdes for (p = ln + 3; *p && *p != '('; p++) 71090267Sdes /* nothing */ ; 71190267Sdes if (!*p) { 71290267Sdes e = FTP_PROTOCOL_ERROR; 71390267Sdes goto ouch; 71490267Sdes } 71590267Sdes ++p; 71690267Sdes if (sscanf(p, "%c%c%c%d%c", &addr[0], &addr[1], &addr[2], 71790267Sdes &port, &addr[3]) != 5 || 71890267Sdes addr[0] != addr[1] || 71990267Sdes addr[0] != addr[2] || addr[0] != addr[3]) { 72090267Sdes e = FTP_PROTOCOL_ERROR; 72190267Sdes goto ouch; 72290267Sdes } 72390267Sdes break; 72490267Sdes } 72560188Sdes 72690267Sdes /* seek to required offset */ 72790267Sdes if (offset) 728174588Sdes if (ftp_cmd(conn, "REST %lu", (u_long)offset) != FTP_FILE_OK) 72990267Sdes goto sysouch; 73090267Sdes 73190267Sdes /* construct sockaddr for data socket */ 732109967Sdes l = sizeof(sa); 73397856Sdes if (getpeername(conn->sd, (struct sockaddr *)&sa, &l) == -1) 73490267Sdes goto sysouch; 73590267Sdes if (sa.ss_family == AF_INET6) 73690267Sdes unmappedaddr((struct sockaddr_in6 *)&sa); 73790267Sdes switch (sa.ss_family) { 73890267Sdes case AF_INET6: 73990267Sdes sin6 = (struct sockaddr_in6 *)&sa; 74090267Sdes if (e == FTP_EPASSIVE_MODE) 74190267Sdes sin6->sin6_port = htons(port); 74290267Sdes else { 74390267Sdes bcopy(addr + 2, (char *)&sin6->sin6_addr, 16); 74490267Sdes bcopy(addr + 19, (char *)&sin6->sin6_port, 2); 74590267Sdes } 74690267Sdes break; 74790267Sdes case AF_INET: 74890267Sdes sin4 = (struct sockaddr_in *)&sa; 74990267Sdes if (e == FTP_EPASSIVE_MODE) 75090267Sdes sin4->sin_port = htons(port); 75190267Sdes else { 75290267Sdes bcopy(addr, (char *)&sin4->sin_addr, 4); 75390267Sdes bcopy(addr + 4, (char *)&sin4->sin_port, 2); 75490267Sdes } 75590267Sdes break; 75690267Sdes default: 75790267Sdes e = FTP_PROTOCOL_ERROR; /* XXX: error code should be prepared */ 75890267Sdes break; 75990267Sdes } 76090267Sdes 76190267Sdes /* connect to data port */ 76290267Sdes if (verbose) 763174588Sdes fetch_info("opening data connection"); 764159566Sdes bindaddr = getenv("FETCH_BIND_ADDRESS"); 765159566Sdes if (bindaddr != NULL && *bindaddr != '\0' && 766174588Sdes fetch_bind(sd, sa.ss_family, bindaddr) != 0) 767159566Sdes goto sysouch; 76890267Sdes if (connect(sd, (struct sockaddr *)&sa, sa.ss_len) == -1) 76990267Sdes goto sysouch; 77090267Sdes 77190267Sdes /* make the server initiate the transfer */ 77290267Sdes if (verbose) 773174588Sdes fetch_info("initiating transfer"); 774174588Sdes e = ftp_cmd(conn, "%s %.*s", oper, filenamelen, filename); 77590267Sdes if (e != FTP_CONNECTION_ALREADY_OPEN && e != FTP_OPEN_DATA_CONNECTION) 77690267Sdes goto ouch; 77790267Sdes 77890267Sdes } else { 77990267Sdes u_int32_t a; 78090267Sdes u_short p; 78190267Sdes int arg, d; 78290267Sdes char *ap; 78390267Sdes char hname[INET6_ADDRSTRLEN]; 78490267Sdes 78590267Sdes switch (sa.ss_family) { 78690267Sdes case AF_INET6: 78790267Sdes ((struct sockaddr_in6 *)&sa)->sin6_port = 0; 78860737Sume#ifdef IPV6_PORTRANGE 78990267Sdes arg = low ? IPV6_PORTRANGE_DEFAULT : IPV6_PORTRANGE_HIGH; 79090267Sdes if (setsockopt(sd, IPPROTO_IPV6, IPV6_PORTRANGE, 79190267Sdes (char *)&arg, sizeof(arg)) == -1) 79290267Sdes goto sysouch; 79360737Sume#endif 79490267Sdes break; 79590267Sdes case AF_INET: 79690267Sdes ((struct sockaddr_in *)&sa)->sin_port = 0; 79790267Sdes arg = low ? IP_PORTRANGE_DEFAULT : IP_PORTRANGE_HIGH; 79890267Sdes if (setsockopt(sd, IPPROTO_IP, IP_PORTRANGE, 799109967Sdes (char *)&arg, sizeof(arg)) == -1) 80090267Sdes goto sysouch; 80190267Sdes break; 80290267Sdes } 80390267Sdes if (verbose) 804174588Sdes fetch_info("binding data socket"); 80590267Sdes if (bind(sd, (struct sockaddr *)&sa, sa.ss_len) == -1) 80690267Sdes goto sysouch; 80790267Sdes if (listen(sd, 1) == -1) 80890267Sdes goto sysouch; 80937573Sdes 81090267Sdes /* find what port we're on and tell the server */ 81190267Sdes if (getsockname(sd, (struct sockaddr *)&sa, &l) == -1) 81290267Sdes goto sysouch; 81390267Sdes switch (sa.ss_family) { 81490267Sdes case AF_INET: 81590267Sdes sin4 = (struct sockaddr_in *)&sa; 81690267Sdes a = ntohl(sin4->sin_addr.s_addr); 81790267Sdes p = ntohs(sin4->sin_port); 818174588Sdes e = ftp_cmd(conn, "PORT %d,%d,%d,%d,%d,%d", 81990267Sdes (a >> 24) & 0xff, (a >> 16) & 0xff, 82090267Sdes (a >> 8) & 0xff, a & 0xff, 82190267Sdes (p >> 8) & 0xff, p & 0xff); 82290267Sdes break; 82390267Sdes case AF_INET6: 82460737Sume#define UC(b) (((int)b)&0xff) 82590267Sdes e = -1; 82690267Sdes sin6 = (struct sockaddr_in6 *)&sa; 82799253Sume sin6->sin6_scope_id = 0; 82890267Sdes if (getnameinfo((struct sockaddr *)&sa, sa.ss_len, 82990267Sdes hname, sizeof(hname), 83090267Sdes NULL, 0, NI_NUMERICHOST) == 0) { 831174588Sdes e = ftp_cmd(conn, "EPRT |%d|%s|%d|", 2, hname, 83290267Sdes htons(sin6->sin6_port)); 83390267Sdes if (e == -1) 83490267Sdes goto ouch; 83590267Sdes } 83690267Sdes if (e != FTP_OK) { 83790267Sdes ap = (char *)&sin6->sin6_addr; 838174588Sdes e = ftp_cmd(conn, 83990267Sdes "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d", 84090267Sdes 6, 16, 84190267Sdes UC(ap[0]), UC(ap[1]), UC(ap[2]), UC(ap[3]), 84290267Sdes UC(ap[4]), UC(ap[5]), UC(ap[6]), UC(ap[7]), 84390267Sdes UC(ap[8]), UC(ap[9]), UC(ap[10]), UC(ap[11]), 84490267Sdes UC(ap[12]), UC(ap[13]), UC(ap[14]), UC(ap[15]), 84590267Sdes 2, 84690267Sdes (ntohs(sin6->sin6_port) >> 8) & 0xff, 84790267Sdes ntohs(sin6->sin6_port) & 0xff); 84890267Sdes } 84990267Sdes break; 85090267Sdes default: 85190267Sdes e = FTP_PROTOCOL_ERROR; /* XXX: error code should be prepared */ 85290267Sdes goto ouch; 85390267Sdes } 85490267Sdes if (e != FTP_OK) 85590267Sdes goto ouch; 85690267Sdes 85790267Sdes /* seek to required offset */ 85890267Sdes if (offset) 859174588Sdes if (ftp_cmd(conn, "REST %ju", (uintmax_t)offset) != FTP_FILE_OK) 86090267Sdes goto sysouch; 86190267Sdes 86290267Sdes /* make the server initiate the transfer */ 86390267Sdes if (verbose) 864174588Sdes fetch_info("initiating transfer"); 865174588Sdes e = ftp_cmd(conn, "%s %.*s", oper, filenamelen, filename); 866119123Sdes if (e != FTP_CONNECTION_ALREADY_OPEN && e != FTP_OPEN_DATA_CONNECTION) 86790267Sdes goto ouch; 86890267Sdes 86990267Sdes /* accept the incoming connection and go to town */ 87090267Sdes if ((d = accept(sd, NULL, NULL)) == -1) 87190267Sdes goto sysouch; 87290267Sdes close(sd); 87390267Sdes sd = d; 87460737Sume } 87537573Sdes 876174588Sdes if ((df = ftp_setup(conn, fetch_reopen(sd), mode)) == NULL) 87762256Sdes goto sysouch; 87890267Sdes return (df); 87937573Sdes 88037573Sdessysouch: 881174588Sdes fetch_syserr(); 88290267Sdes if (sd >= 0) 88390267Sdes close(sd); 88490267Sdes return (NULL); 88541869Sdes 88637573Sdesouch: 88790267Sdes if (e != -1) 888174588Sdes ftp_seterr(e); 88990267Sdes if (sd >= 0) 89090267Sdes close(sd); 89190267Sdes return (NULL); 89237535Sdes} 89337535Sdes 89437571Sdes/* 89577238Sdes * Authenticate 89677238Sdes */ 89777238Sdesstatic int 898174588Sdesftp_authenticate(conn_t *conn, struct url *url, struct url *purl) 89977238Sdes{ 90090267Sdes const char *user, *pwd, *logname; 90190267Sdes char pbuf[MAXHOSTNAMELEN + MAXLOGNAME + 1]; 90290267Sdes int e, len; 90377238Sdes 90490267Sdes /* XXX FTP_AUTH, and maybe .netrc */ 90590267Sdes 90690267Sdes /* send user name and password */ 907109697Sdes if (url->user[0] == '\0') 908174588Sdes fetch_netrc_auth(url); 90990267Sdes user = url->user; 910109697Sdes if (*user == '\0') 91190267Sdes user = getenv("FTP_LOGIN"); 912109697Sdes if (user == NULL || *user == '\0') 91390267Sdes user = FTP_ANONYMOUS_USER; 914174588Sdes if (purl && url->port == fetch_default_port(url->scheme)) 915174588Sdes e = ftp_cmd(conn, "USER %s@%s", user, url->host); 91690267Sdes else if (purl) 917174588Sdes e = ftp_cmd(conn, "USER %s@%s@%d", user, url->host, url->port); 91890267Sdes else 919174588Sdes e = ftp_cmd(conn, "USER %s", user); 92090267Sdes 92190267Sdes /* did the server request a password? */ 92290267Sdes if (e == FTP_NEED_PASSWORD) { 92390267Sdes pwd = url->pwd; 924109697Sdes if (*pwd == '\0') 92590267Sdes pwd = getenv("FTP_PASSWORD"); 926109697Sdes if (pwd == NULL || *pwd == '\0') { 92790267Sdes if ((logname = getlogin()) == 0) 92890267Sdes logname = FTP_ANONYMOUS_USER; 92990267Sdes if ((len = snprintf(pbuf, MAXLOGNAME + 1, "%s@", logname)) < 0) 93090267Sdes len = 0; 93190267Sdes else if (len > MAXLOGNAME) 93290267Sdes len = MAXLOGNAME; 933109967Sdes gethostname(pbuf + len, sizeof(pbuf) - len); 93490267Sdes pwd = pbuf; 93590267Sdes } 936174588Sdes e = ftp_cmd(conn, "PASS %s", pwd); 93777238Sdes } 93890267Sdes 93990267Sdes return (e); 94077238Sdes} 94177238Sdes 94277238Sdes/* 94337571Sdes * Log on to FTP server 94437535Sdes */ 94597856Sdesstatic conn_t * 946174588Sdesftp_connect(struct url *url, struct url *purl, const char *flags) 94737571Sdes{ 94897856Sdes conn_t *conn; 94997856Sdes int e, direct, verbose; 95060737Sume#ifdef INET6 95190267Sdes int af = AF_UNSPEC; 95260737Sume#else 95390267Sdes int af = AF_INET; 95460737Sume#endif 95537571Sdes 95690267Sdes direct = CHECK_FLAG('d'); 95790267Sdes verbose = CHECK_FLAG('v'); 95890267Sdes if (CHECK_FLAG('4')) 95990267Sdes af = AF_INET; 96090267Sdes else if (CHECK_FLAG('6')) 96190267Sdes af = AF_INET6; 96260737Sume 96390267Sdes if (direct) 96490267Sdes purl = NULL; 96537608Sdes 96690267Sdes /* check for proxy */ 96790267Sdes if (purl) { 96890267Sdes /* XXX proxy authentication! */ 969174588Sdes conn = fetch_connect(purl->host, purl->port, af, verbose); 97090267Sdes } else { 97190267Sdes /* no proxy, go straight to target */ 972174588Sdes conn = fetch_connect(url->host, url->port, af, verbose); 97390267Sdes purl = NULL; 97490267Sdes } 97537608Sdes 97690267Sdes /* check connection */ 977103459Sfenner if (conn == NULL) 978174588Sdes /* fetch_connect() has already set an error code */ 97990267Sdes return (NULL); 98090267Sdes 98190267Sdes /* expect welcome message */ 982174588Sdes if ((e = ftp_chkerr(conn)) != FTP_SERVICE_READY) 98390267Sdes goto fouch; 98490267Sdes 98590267Sdes /* authenticate */ 986174588Sdes if ((e = ftp_authenticate(conn, url, purl)) != FTP_LOGGED_IN) 98790267Sdes goto fouch; 98890267Sdes 989168960Snjl /* TODO: Request extended features supported, if any (RFC 3659). */ 990168960Snjl 99190267Sdes /* done */ 99297856Sdes return (conn); 99390267Sdes 99437571Sdesfouch: 99590267Sdes if (e != -1) 996174588Sdes ftp_seterr(e); 997174588Sdes fetch_close(conn); 99890267Sdes return (NULL); 99937571Sdes} 100037571Sdes 100137571Sdes/* 100237571Sdes * Disconnect from server 100337571Sdes */ 100437571Sdesstatic void 1005174588Sdesftp_disconnect(conn_t *conn) 100637571Sdes{ 1007174588Sdes (void)ftp_cmd(conn, "QUIT"); 1008105903Snjl if (conn == cached_connection && conn->ref == 1) 1009105903Snjl cached_connection = NULL; 1010174588Sdes fetch_close(conn); 101137571Sdes} 101237571Sdes 101337571Sdes/* 101437571Sdes * Check if we're already connected 101537571Sdes */ 101637571Sdesstatic int 1017174588Sdesftp_isconnected(struct url *url) 101837571Sdes{ 101997856Sdes return (cached_connection 102037571Sdes && (strcmp(url->host, cached_host.host) == 0) 102137571Sdes && (strcmp(url->user, cached_host.user) == 0) 102237571Sdes && (strcmp(url->pwd, cached_host.pwd) == 0) 102337571Sdes && (url->port == cached_host.port)); 102437571Sdes} 102537571Sdes 102637608Sdes/* 102741869Sdes * Check the cache, reconnect if no luck 102837608Sdes */ 102997856Sdesstatic conn_t * 1030174588Sdesftp_cached_connect(struct url *url, struct url *purl, const char *flags) 103137535Sdes{ 103297856Sdes conn_t *conn; 103397856Sdes int e; 103437535Sdes 103590267Sdes /* set default port */ 103690267Sdes if (!url->port) 1037174588Sdes url->port = fetch_default_port(url->scheme); 103890267Sdes 103990267Sdes /* try to use previously cached connection */ 1040174588Sdes if (ftp_isconnected(url)) { 1041174588Sdes e = ftp_cmd(cached_connection, "NOOP"); 104290267Sdes if (e == FTP_OK || e == FTP_SYNTAX_ERROR) 1043174588Sdes return (fetch_ref(cached_connection)); 104490267Sdes } 104590267Sdes 104690267Sdes /* connect to server */ 1047174588Sdes if ((conn = ftp_connect(url, purl, flags)) == NULL) 104897856Sdes return (NULL); 104997856Sdes if (cached_connection) 1050174588Sdes ftp_disconnect(cached_connection); 1051174588Sdes cached_connection = fetch_ref(conn); 1052109967Sdes memcpy(&cached_host, url, sizeof(*url)); 105397856Sdes return (conn); 105437535Sdes} 105537535Sdes 105637571Sdes/* 105767043Sdes * Check the proxy settings 105863713Sdes */ 105967043Sdesstatic struct url * 1060174588Sdesftp_get_proxy(const char *flags) 106163713Sdes{ 106290267Sdes struct url *purl; 106390267Sdes char *p; 106490267Sdes 1065112420Smtm if (flags != NULL && strchr(flags, 'd') != NULL) 1066112081Sdes return (NULL); 106790267Sdes if (((p = getenv("FTP_PROXY")) || (p = getenv("ftp_proxy")) || 106890267Sdes (p = getenv("HTTP_PROXY")) || (p = getenv("http_proxy"))) && 106990267Sdes *p && (purl = fetchParseURL(p)) != NULL) { 107090267Sdes if (!*purl->scheme) { 107190267Sdes if (getenv("FTP_PROXY") || getenv("ftp_proxy")) 107290267Sdes strcpy(purl->scheme, SCHEME_FTP); 107390267Sdes else 107490267Sdes strcpy(purl->scheme, SCHEME_HTTP); 107590267Sdes } 107690267Sdes if (!purl->port) 1077174588Sdes purl->port = fetch_default_proxy_port(purl->scheme); 107890267Sdes if (strcasecmp(purl->scheme, SCHEME_FTP) == 0 || 107990267Sdes strcasecmp(purl->scheme, SCHEME_HTTP) == 0) 108090267Sdes return (purl); 108190267Sdes fetchFreeURL(purl); 108269272Sdes } 108390267Sdes return (NULL); 108463713Sdes} 108563713Sdes 108663713Sdes/* 108787315Sdes * Process an FTP request 108837571Sdes */ 108937535SdesFILE * 1090174588Sdesftp_request(struct url *url, const char *op, struct url_stat *us, 109190267Sdes struct url *purl, const char *flags) 109237608Sdes{ 109397856Sdes conn_t *conn; 109497856Sdes int oflag; 109590267Sdes 109690267Sdes /* check if we should use HTTP instead */ 109790267Sdes if (purl && strcasecmp(purl->scheme, SCHEME_HTTP) == 0) { 109890267Sdes if (strcmp(op, "STAT") == 0) 1099174588Sdes return (http_request(url, "HEAD", us, purl, flags)); 110090267Sdes else if (strcmp(op, "RETR") == 0) 1101174588Sdes return (http_request(url, "GET", us, purl, flags)); 110290267Sdes /* 110390267Sdes * Our HTTP code doesn't support PUT requests yet, so try 110490267Sdes * a direct connection. 110590267Sdes */ 110690267Sdes } 110790267Sdes 110890267Sdes /* connect to server */ 1109174588Sdes conn = ftp_cached_connect(url, purl, flags); 111090267Sdes if (purl) 111190267Sdes fetchFreeURL(purl); 111297856Sdes if (conn == NULL) 111390267Sdes return (NULL); 111490267Sdes 111590267Sdes /* change directory */ 1116174588Sdes if (ftp_cwd(conn, url->doc) == -1) 111790267Sdes return (NULL); 111890267Sdes 111990267Sdes /* stat file */ 1120174588Sdes if (us && ftp_stat(conn, url->doc, us) == -1 112190267Sdes && fetchLastErrCode != FETCH_PROTO 112290267Sdes && fetchLastErrCode != FETCH_UNAVAIL) 112390267Sdes return (NULL); 112490267Sdes 112590267Sdes /* just a stat */ 112687315Sdes if (strcmp(op, "STAT") == 0) 112790267Sdes return (FILE *)1; /* bogus return value */ 112890267Sdes if (strcmp(op, "STOR") == 0 || strcmp(op, "APPE") == 0) 112990267Sdes oflag = O_WRONLY; 113090267Sdes else 113190267Sdes oflag = O_RDONLY; 113287315Sdes 113390267Sdes /* initiate the transfer */ 1134174588Sdes return (ftp_transfer(conn, op, url->doc, oflag, url->offset, flags)); 113537608Sdes} 113637608Sdes 113741869Sdes/* 113887315Sdes * Get and stat file 113987315Sdes */ 114087315SdesFILE * 114187315SdesfetchXGetFTP(struct url *url, struct url_stat *us, const char *flags) 114287315Sdes{ 1143174588Sdes return (ftp_request(url, "RETR", us, ftp_get_proxy(flags), flags)); 114487315Sdes} 114587315Sdes 114687315Sdes/* 114763340Sdes * Get file 114863340Sdes */ 114963340SdesFILE * 115075891SarchiefetchGetFTP(struct url *url, const char *flags) 115163340Sdes{ 115290267Sdes return (fetchXGetFTP(url, NULL, flags)); 115363340Sdes} 115463340Sdes 115563340Sdes/* 115641869Sdes * Put file 115741869Sdes */ 115837608SdesFILE * 115975891SarchiefetchPutFTP(struct url *url, const char *flags) 116037535Sdes{ 116141869Sdes 1162174588Sdes return (ftp_request(url, CHECK_FLAG('a') ? "APPE" : "STOR", NULL, 1163174588Sdes ftp_get_proxy(flags), flags)); 116437535Sdes} 116540975Sdes 116641869Sdes/* 116741869Sdes * Get file stats 116841869Sdes */ 116940975Sdesint 117075891SarchiefetchStatFTP(struct url *url, struct url_stat *us, const char *flags) 117140975Sdes{ 1172112081Sdes FILE *f; 117390267Sdes 1174174588Sdes f = ftp_request(url, "STAT", us, ftp_get_proxy(flags), flags); 1175112081Sdes if (f == NULL) 117690267Sdes return (-1); 117790267Sdes return (0); 117840975Sdes} 117941989Sdes 118041989Sdes/* 118141989Sdes * List a directory 118241989Sdes */ 118341989Sdesstruct url_ent * 118485093SdesfetchListFTP(struct url *url __unused, const char *flags __unused) 118541989Sdes{ 118690267Sdes warnx("fetchListFTP(): not implemented"); 118790267Sdes return (NULL); 118841989Sdes} 1189