ftp.c revision 174761
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 174761 2007-12-19 00:26:36Z 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 105174761Sdes#define isftpreply(foo) \ 106174761Sdes (isdigit((unsigned char)foo[0]) && \ 107174761Sdes isdigit((unsigned char)foo[1]) && \ 108174761Sdes isdigit((unsigned char)foo[2]) && \ 109174761Sdes (foo[3] == ' ' || foo[3] == '\0')) 110174761Sdes#define isftpinfo(foo) \ 111174761Sdes (isdigit((unsigned char)foo[0]) && \ 112174761Sdes isdigit((unsigned char)foo[1]) && \ 113174761Sdes isdigit((unsigned char)foo[2]) && \ 114174761Sdes foo[3] == '-') 11555557Sdes 11690267Sdes/* 11790267Sdes * Translate IPv4 mapped IPv6 address to IPv4 address 11890267Sdes */ 11960737Sumestatic void 12060737Sumeunmappedaddr(struct sockaddr_in6 *sin6) 12160737Sume{ 12290267Sdes struct sockaddr_in *sin4; 12390267Sdes u_int32_t addr; 12490267Sdes int port; 12560737Sume 12690267Sdes if (sin6->sin6_family != AF_INET6 || 12790267Sdes !IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 12890267Sdes return; 12990267Sdes sin4 = (struct sockaddr_in *)sin6; 13090267Sdes addr = *(u_int32_t *)&sin6->sin6_addr.s6_addr[12]; 13190267Sdes port = sin6->sin6_port; 13290267Sdes memset(sin4, 0, sizeof(struct sockaddr_in)); 13390267Sdes sin4->sin_addr.s_addr = addr; 13490267Sdes sin4->sin_port = port; 13590267Sdes sin4->sin_family = AF_INET; 13690267Sdes sin4->sin_len = sizeof(struct sockaddr_in); 13760737Sume} 13860737Sume 13937571Sdes/* 14055557Sdes * Get server response 14137535Sdes */ 14237535Sdesstatic int 143174588Sdesftp_chkerr(conn_t *conn) 14437535Sdes{ 145174588Sdes if (fetch_getln(conn) == -1) { 146174588Sdes fetch_syserr(); 14790267Sdes return (-1); 14862215Sdes } 14997856Sdes if (isftpinfo(conn->buf)) { 15097856Sdes while (conn->buflen && !isftpreply(conn->buf)) { 151174588Sdes if (fetch_getln(conn) == -1) { 152174588Sdes fetch_syserr(); 15390267Sdes return (-1); 15490267Sdes } 15590267Sdes } 15690267Sdes } 15755557Sdes 158174761Sdes while (conn->buflen && 159174761Sdes isspace((unsigned char)conn->buf[conn->buflen - 1])) 16097856Sdes conn->buflen--; 16197856Sdes conn->buf[conn->buflen] = '\0'; 16237535Sdes 16397856Sdes if (!isftpreply(conn->buf)) { 164174588Sdes ftp_seterr(FTP_PROTOCOL_ERROR); 16590267Sdes return (-1); 16690267Sdes } 16755557Sdes 16897856Sdes conn->err = (conn->buf[0] - '0') * 100 16997856Sdes + (conn->buf[1] - '0') * 10 17097856Sdes + (conn->buf[2] - '0'); 17190267Sdes 17297856Sdes return (conn->err); 17337535Sdes} 17437535Sdes 17537535Sdes/* 17637573Sdes * Send a command and check reply 17737535Sdes */ 17837535Sdesstatic int 179174588Sdesftp_cmd(conn_t *conn, const char *fmt, ...) 18037535Sdes{ 18190267Sdes va_list ap; 18290267Sdes size_t len; 18390267Sdes char *msg; 18490267Sdes int r; 18537573Sdes 18690267Sdes va_start(ap, fmt); 18790267Sdes len = vasprintf(&msg, fmt, ap); 18890267Sdes va_end(ap); 18990267Sdes 19090267Sdes if (msg == NULL) { 19190267Sdes errno = ENOMEM; 192174588Sdes fetch_syserr(); 19390267Sdes return (-1); 19490267Sdes } 19590267Sdes 196174588Sdes r = fetch_putln(conn, msg, len); 19790267Sdes free(msg); 19890267Sdes 19990267Sdes if (r == -1) { 200174588Sdes fetch_syserr(); 20190267Sdes return (-1); 20290267Sdes } 20390267Sdes 204174588Sdes return (ftp_chkerr(conn)); 20537535Sdes} 20637535Sdes 20737535Sdes/* 20863340Sdes * Return a pointer to the filename part of a path 20963340Sdes */ 21075891Sarchiestatic const char * 211174588Sdesftp_filename(const char *file, int *len, int *type) 21263340Sdes{ 213148986Sdes const char *s; 21490267Sdes 21590267Sdes if ((s = strrchr(file, '/')) == NULL) 216148986Sdes s = file; 21790267Sdes else 218148986Sdes s = s + 1; 219148986Sdes *len = strlen(s); 220148986Sdes if (*len > 7 && strncmp(s + *len - 7, ";type=", 6) == 0) { 221148986Sdes *type = s[*len - 1]; 222148986Sdes *len -= 7; 223148986Sdes } else { 224148986Sdes *type = '\0'; 225148986Sdes } 226148986Sdes return (s); 22763340Sdes} 22863340Sdes 22963340Sdes/* 230148986Sdes * Get current working directory from the reply to a CWD, PWD or CDUP 231148986Sdes * command. 232148986Sdes */ 233148986Sdesstatic int 234174588Sdesftp_pwd(conn_t *conn, char *pwd, size_t pwdlen) 235148986Sdes{ 236148986Sdes char *src, *dst, *end; 237148986Sdes int q; 238148986Sdes 239148986Sdes if (conn->err != FTP_WORKING_DIRECTORY && 240148986Sdes conn->err != FTP_FILE_ACTION_OK) 241148986Sdes return (FTP_PROTOCOL_ERROR); 242148986Sdes end = conn->buf + conn->buflen; 243148986Sdes src = conn->buf + 4; 244148986Sdes if (src >= end || *src++ != '"') 245148986Sdes return (FTP_PROTOCOL_ERROR); 246148986Sdes for (q = 0, dst = pwd; src < end && pwdlen--; ++src) { 247148986Sdes if (!q && *src == '"') 248148986Sdes q = 1; 249148986Sdes else if (q && *src != '"') 250148986Sdes break; 251148986Sdes else if (q) 252148986Sdes *dst++ = '"', q = 0; 253148986Sdes else 254148986Sdes *dst++ = *src; 255148986Sdes } 256148986Sdes if (!pwdlen) 257148986Sdes return (FTP_PROTOCOL_ERROR); 258148986Sdes *dst = '\0'; 259148986Sdes#if 0 260148986Sdes DEBUG(fprintf(stderr, "pwd: [%s]\n", pwd)); 261148986Sdes#endif 262148986Sdes return (FTP_OK); 263148986Sdes} 264148986Sdes 265148986Sdes/* 26690267Sdes * Change working directory to the directory that contains the specified 26790267Sdes * file. 26863340Sdes */ 26963340Sdesstatic int 270174588Sdesftp_cwd(conn_t *conn, const char *file) 27163340Sdes{ 272148986Sdes const char *beg, *end; 273148986Sdes char pwd[PATH_MAX]; 274148986Sdes int e, i, len; 27563340Sdes 276168960Snjl /* If no slashes in name, no need to change dirs. */ 277148986Sdes if ((end = strrchr(file, '/')) == NULL) 278148986Sdes return (0); 279174588Sdes if ((e = ftp_cmd(conn, "PWD")) != FTP_WORKING_DIRECTORY || 280174588Sdes (e = ftp_pwd(conn, pwd, sizeof(pwd))) != FTP_OK) { 281174588Sdes ftp_seterr(e); 28290267Sdes return (-1); 28390267Sdes } 284148986Sdes for (;;) { 285148986Sdes len = strlen(pwd); 286168960Snjl 287168960Snjl /* Look for a common prefix between PWD and dir to fetch. */ 288148986Sdes for (i = 0; i <= len && i <= end - file; ++i) 289148986Sdes if (pwd[i] != file[i]) 290148986Sdes break; 291148986Sdes#if 0 292148986Sdes DEBUG(fprintf(stderr, "have: [%.*s|%s]\n", i, pwd, pwd + i)); 293148986Sdes DEBUG(fprintf(stderr, "want: [%.*s|%s]\n", i, file, file + i)); 294148986Sdes#endif 295168960Snjl /* Keep going up a dir until we have a matching prefix. */ 296148986Sdes if (pwd[i] == '\0' && (file[i - 1] == '/' || file[i] == '/')) 297148986Sdes break; 298174588Sdes if ((e = ftp_cmd(conn, "CDUP")) != FTP_FILE_ACTION_OK || 299174588Sdes (e = ftp_cmd(conn, "PWD")) != FTP_WORKING_DIRECTORY || 300174588Sdes (e = ftp_pwd(conn, pwd, sizeof(pwd))) != FTP_OK) { 301174588Sdes ftp_seterr(e); 302148986Sdes return (-1); 303148986Sdes } 304148986Sdes } 305168960Snjl 306168960Snjl#ifdef FTP_COMBINE_CWDS 307168960Snjl /* Skip leading slashes, even "////". */ 308168960Snjl for (beg = file + i; beg < end && *beg == '/'; ++beg, ++i) 309168960Snjl /* nothing */ ; 310168960Snjl 311168960Snjl /* If there is no trailing dir, we're already there. */ 312168960Snjl if (beg >= end) 313168960Snjl return (0); 314168960Snjl 315168960Snjl /* Change to the directory all in one chunk (e.g., foo/bar/baz). */ 316174588Sdes e = ftp_cmd(conn, "CWD %.*s", (int)(end - beg), beg); 317168960Snjl if (e == FTP_FILE_ACTION_OK) 318168960Snjl return (0); 319168960Snjl#endif /* FTP_COMBINE_CWDS */ 320168960Snjl 321168960Snjl /* That didn't work so go back to legacy behavior (multiple CWDs). */ 322148986Sdes for (beg = file + i; beg < end; beg = file + i + 1) { 323159565Sdes while (*beg == '/') 324159565Sdes ++beg, ++i; 325148986Sdes for (++i; file + i < end && file[i] != '/'; ++i) 326148986Sdes /* nothing */ ; 327174588Sdes e = ftp_cmd(conn, "CWD %.*s", file + i - beg, beg); 328148986Sdes if (e != FTP_FILE_ACTION_OK) { 329174588Sdes ftp_seterr(e); 330148986Sdes return (-1); 331148986Sdes } 332148986Sdes } 33390267Sdes return (0); 33463340Sdes} 33563340Sdes 33663340Sdes/* 337148986Sdes * Set transfer mode and data type 338148986Sdes */ 339148986Sdesstatic int 340174588Sdesftp_mode_type(conn_t *conn, int mode, int type) 341148986Sdes{ 342148986Sdes int e; 343148986Sdes 344148986Sdes switch (mode) { 345148986Sdes case 0: 346148986Sdes case 's': 347148986Sdes mode = 'S'; 348148986Sdes case 'S': 349148986Sdes break; 350148986Sdes default: 351148986Sdes return (FTP_PROTOCOL_ERROR); 352148986Sdes } 353174588Sdes if ((e = ftp_cmd(conn, "MODE %c", mode)) != FTP_OK) { 354154550Sdes if (mode == 'S') { 355154550Sdes /* 356154550Sdes * Stream mode is supposed to be the default - so 357154550Sdes * much so that some servers not only do not 358154550Sdes * support any other mode, but do not support the 359154550Sdes * MODE command at all. 360154550Sdes * 361154550Sdes * If "MODE S" fails, it is unlikely that we 362154550Sdes * previously succeeded in setting a different 363154550Sdes * mode. Therefore, we simply hope that the 364154550Sdes * server is already in the correct mode, and 365154550Sdes * silently ignore the failure. 366154550Sdes */ 367154550Sdes } else { 368154550Sdes return (e); 369154550Sdes } 370154550Sdes } 371148986Sdes 372148986Sdes switch (type) { 373148986Sdes case 0: 374148986Sdes case 'i': 375148986Sdes type = 'I'; 376148986Sdes case 'I': 377148986Sdes break; 378148986Sdes case 'a': 379148986Sdes type = 'A'; 380148986Sdes case 'A': 381148986Sdes break; 382148986Sdes case 'd': 383148986Sdes type = 'D'; 384148986Sdes case 'D': 385148986Sdes /* can't handle yet */ 386148986Sdes default: 387148986Sdes return (FTP_PROTOCOL_ERROR); 388148986Sdes } 389174588Sdes if ((e = ftp_cmd(conn, "TYPE %c", type)) != FTP_OK) 390148986Sdes return (e); 391148986Sdes 392148986Sdes return (FTP_OK); 393148986Sdes} 394148986Sdes 395148986Sdes/* 39663340Sdes * Request and parse file stats 39763340Sdes */ 39863340Sdesstatic int 399174588Sdesftp_stat(conn_t *conn, const char *file, struct url_stat *us) 40063340Sdes{ 40190267Sdes char *ln; 402148986Sdes const char *filename; 403148986Sdes int filenamelen, type; 40490267Sdes struct tm tm; 40590267Sdes time_t t; 40690267Sdes int e; 40763340Sdes 40875292Sdes us->size = -1; 40990267Sdes us->atime = us->mtime = 0; 41063340Sdes 411174588Sdes filename = ftp_filename(file, &filenamelen, &type); 41290267Sdes 413174588Sdes if ((e = ftp_mode_type(conn, 0, type)) != FTP_OK) { 414174588Sdes ftp_seterr(e); 41590267Sdes return (-1); 41690267Sdes } 417148986Sdes 418174588Sdes e = ftp_cmd(conn, "SIZE %.*s", filenamelen, filename); 419148986Sdes if (e != FTP_FILE_STATUS) { 420174588Sdes ftp_seterr(e); 421148986Sdes return (-1); 422148986Sdes } 423174761Sdes for (ln = conn->buf + 4; *ln && isspace((unsigned char)*ln); ln++) 42490267Sdes /* nothing */ ; 425174761Sdes for (us->size = 0; *ln && isdigit((unsigned char)*ln); ln++) 42690267Sdes us->size = us->size * 10 + *ln - '0'; 427174761Sdes if (*ln && !isspace((unsigned char)*ln)) { 428174588Sdes ftp_seterr(FTP_PROTOCOL_ERROR); 42990267Sdes us->size = -1; 43090267Sdes return (-1); 43190267Sdes } 43290267Sdes if (us->size == 0) 43390267Sdes us->size = -1; 43490267Sdes DEBUG(fprintf(stderr, "size: [%lld]\n", (long long)us->size)); 43590267Sdes 436174588Sdes e = ftp_cmd(conn, "MDTM %.*s", filenamelen, filename); 437148986Sdes if (e != FTP_FILE_STATUS) { 438174588Sdes ftp_seterr(e); 43990267Sdes return (-1); 44090267Sdes } 441174761Sdes for (ln = conn->buf + 4; *ln && isspace((unsigned char)*ln); ln++) 44290267Sdes /* nothing */ ; 44390267Sdes switch (strspn(ln, "0123456789")) { 44490267Sdes case 14: 44590267Sdes break; 44690267Sdes case 15: 44790267Sdes ln++; 44890267Sdes ln[0] = '2'; 44990267Sdes ln[1] = '0'; 45090267Sdes break; 45190267Sdes default: 452174588Sdes ftp_seterr(FTP_PROTOCOL_ERROR); 45390267Sdes return (-1); 45490267Sdes } 45590267Sdes if (sscanf(ln, "%04d%02d%02d%02d%02d%02d", 45690267Sdes &tm.tm_year, &tm.tm_mon, &tm.tm_mday, 45790267Sdes &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) { 458174588Sdes ftp_seterr(FTP_PROTOCOL_ERROR); 45990267Sdes return (-1); 46090267Sdes } 46190267Sdes tm.tm_mon--; 46290267Sdes tm.tm_year -= 1900; 46390267Sdes tm.tm_isdst = -1; 46490267Sdes t = timegm(&tm); 46590267Sdes if (t == (time_t)-1) 46690267Sdes t = time(NULL); 46790267Sdes us->mtime = t; 46890267Sdes us->atime = t; 46990267Sdes DEBUG(fprintf(stderr, 47090267Sdes "last modified: [%04d-%02d-%02d %02d:%02d:%02d]\n", 47190267Sdes tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, 47290267Sdes tm.tm_hour, tm.tm_min, tm.tm_sec)); 47390267Sdes return (0); 47463340Sdes} 47563340Sdes 47663340Sdes/* 47767430Sdes * I/O functions for FTP 47867430Sdes */ 47967430Sdesstruct ftpio { 48097866Sdes conn_t *cconn; /* Control connection */ 48197866Sdes conn_t *dconn; /* Data connection */ 48290267Sdes int dir; /* Direction */ 48390267Sdes int eof; /* EOF reached */ 48490267Sdes int err; /* Error code */ 48567430Sdes}; 48667430Sdes 487174588Sdesstatic int ftp_readfn(void *, char *, int); 488174588Sdesstatic int ftp_writefn(void *, const char *, int); 489174588Sdesstatic fpos_t ftp_seekfn(void *, fpos_t, int); 490174588Sdesstatic int ftp_closefn(void *); 49167430Sdes 49267430Sdesstatic int 493174588Sdesftp_readfn(void *v, char *buf, int len) 49467430Sdes{ 49590267Sdes struct ftpio *io; 49690267Sdes int r; 49767430Sdes 49890267Sdes io = (struct ftpio *)v; 49990267Sdes if (io == NULL) { 50090267Sdes errno = EBADF; 50190267Sdes return (-1); 50290267Sdes } 50397866Sdes if (io->cconn == NULL || io->dconn == NULL || io->dir == O_WRONLY) { 50490267Sdes errno = EBADF; 50590267Sdes return (-1); 50690267Sdes } 50790267Sdes if (io->err) { 50890267Sdes errno = io->err; 50990267Sdes return (-1); 51090267Sdes } 51190267Sdes if (io->eof) 51290267Sdes return (0); 513174588Sdes r = fetch_read(io->dconn, buf, len); 51490267Sdes if (r > 0) 51590267Sdes return (r); 51690267Sdes if (r == 0) { 51790267Sdes io->eof = 1; 51890267Sdes return (0); 51990267Sdes } 52090267Sdes if (errno != EINTR) 52190267Sdes io->err = errno; 52290267Sdes return (-1); 52367430Sdes} 52467430Sdes 52567430Sdesstatic int 526174588Sdesftp_writefn(void *v, const char *buf, int len) 52767430Sdes{ 52890267Sdes struct ftpio *io; 52990267Sdes int w; 53090267Sdes 53190267Sdes io = (struct ftpio *)v; 53290267Sdes if (io == NULL) { 53390267Sdes errno = EBADF; 53490267Sdes return (-1); 53590267Sdes } 53697866Sdes if (io->cconn == NULL || io->dconn == NULL || io->dir == O_RDONLY) { 53790267Sdes errno = EBADF; 53890267Sdes return (-1); 53990267Sdes } 54090267Sdes if (io->err) { 54190267Sdes errno = io->err; 54290267Sdes return (-1); 54390267Sdes } 544174588Sdes w = fetch_write(io->dconn, buf, len); 54590267Sdes if (w >= 0) 54690267Sdes return (w); 54790267Sdes if (errno != EINTR) 54890267Sdes io->err = errno; 54990267Sdes return (-1); 55067430Sdes} 55167430Sdes 55267430Sdesstatic fpos_t 553174588Sdesftp_seekfn(void *v, fpos_t pos __unused, int whence __unused) 55467430Sdes{ 55590267Sdes struct ftpio *io; 55690267Sdes 55790267Sdes io = (struct ftpio *)v; 55890267Sdes if (io == NULL) { 55990267Sdes errno = EBADF; 56090267Sdes return (-1); 56190267Sdes } 56290267Sdes errno = ESPIPE; 56390267Sdes return (-1); 56467430Sdes} 56567430Sdes 56667430Sdesstatic int 567174588Sdesftp_closefn(void *v) 56867430Sdes{ 56990267Sdes struct ftpio *io; 57090267Sdes int r; 57167430Sdes 57290267Sdes io = (struct ftpio *)v; 57390267Sdes if (io == NULL) { 57490267Sdes errno = EBADF; 57590267Sdes return (-1); 57690267Sdes } 57790267Sdes if (io->dir == -1) 57890267Sdes return (0); 57997866Sdes if (io->cconn == NULL || io->dconn == NULL) { 58090267Sdes errno = EBADF; 58190267Sdes return (-1); 58290267Sdes } 583174588Sdes fetch_close(io->dconn); 58490267Sdes io->dir = -1; 58597866Sdes io->dconn = NULL; 58690267Sdes DEBUG(fprintf(stderr, "Waiting for final status\n")); 587174588Sdes r = ftp_chkerr(io->cconn); 588105903Snjl if (io->cconn == cached_connection && io->cconn->ref == 1) 589105903Snjl cached_connection = NULL; 590174588Sdes fetch_close(io->cconn); 59190267Sdes free(io); 59290267Sdes return (r == FTP_TRANSFER_COMPLETE) ? 0 : -1; 59367430Sdes} 59467430Sdes 59567430Sdesstatic FILE * 596174588Sdesftp_setup(conn_t *cconn, conn_t *dconn, int mode) 59767430Sdes{ 59890267Sdes struct ftpio *io; 59990267Sdes FILE *f; 60067430Sdes 60197866Sdes if (cconn == NULL || dconn == NULL) 60297866Sdes return (NULL); 603109967Sdes if ((io = malloc(sizeof(*io))) == NULL) 60490267Sdes return (NULL); 60597866Sdes io->cconn = cconn; 60697866Sdes io->dconn = dconn; 60790267Sdes io->dir = mode; 60890267Sdes io->eof = io->err = 0; 609174588Sdes f = funopen(io, ftp_readfn, ftp_writefn, ftp_seekfn, ftp_closefn); 61090267Sdes if (f == NULL) 61190267Sdes free(io); 61290267Sdes return (f); 61367430Sdes} 61467430Sdes 61567430Sdes/* 61637608Sdes * Transfer file 61737535Sdes */ 61837535Sdesstatic FILE * 619174588Sdesftp_transfer(conn_t *conn, const char *oper, const char *file, 62090267Sdes int mode, off_t offset, const char *flags) 62137535Sdes{ 62290267Sdes struct sockaddr_storage sa; 62390267Sdes struct sockaddr_in6 *sin6; 62490267Sdes struct sockaddr_in *sin4; 625159566Sdes const char *bindaddr; 626148986Sdes const char *filename; 627148986Sdes int filenamelen, type; 62890267Sdes int low, pasv, verbose; 62990267Sdes int e, sd = -1; 63090267Sdes socklen_t l; 63190267Sdes char *s; 63290267Sdes FILE *df; 63355544Sdes 63490267Sdes /* check flags */ 63590267Sdes low = CHECK_FLAG('l'); 63690267Sdes pasv = CHECK_FLAG('p'); 63790267Sdes verbose = CHECK_FLAG('v'); 63855544Sdes 63990267Sdes /* passive mode */ 64090267Sdes if (!pasv) 64190267Sdes pasv = ((s = getenv("FTP_PASSIVE_MODE")) != NULL && 64290267Sdes strncasecmp(s, "no", 2) != 0); 64360951Sdes 644148986Sdes /* isolate filename */ 645174588Sdes filename = ftp_filename(file, &filenamelen, &type); 646148986Sdes 647148986Sdes /* set transfer mode and data type */ 648174588Sdes if ((e = ftp_mode_type(conn, 0, type)) != FTP_OK) 649148986Sdes goto ouch; 650148986Sdes 65190267Sdes /* find our own address, bind, and listen */ 652109967Sdes l = sizeof(sa); 65397856Sdes if (getsockname(conn->sd, (struct sockaddr *)&sa, &l) == -1) 65490267Sdes goto sysouch; 65590267Sdes if (sa.ss_family == AF_INET6) 65690267Sdes unmappedaddr((struct sockaddr_in6 *)&sa); 65760737Sume 65890267Sdes /* open data socket */ 65990267Sdes if ((sd = socket(sa.ss_family, SOCK_STREAM, IPPROTO_TCP)) == -1) { 660174588Sdes fetch_syserr(); 66190267Sdes return (NULL); 66260737Sume } 66337573Sdes 66490267Sdes if (pasv) { 66590267Sdes u_char addr[64]; 66690267Sdes char *ln, *p; 66790267Sdes unsigned int i; 66890267Sdes int port; 66937573Sdes 67090267Sdes /* send PASV command */ 67190267Sdes if (verbose) 672174588Sdes fetch_info("setting passive mode"); 67390267Sdes switch (sa.ss_family) { 67490267Sdes case AF_INET: 675174588Sdes if ((e = ftp_cmd(conn, "PASV")) != FTP_PASSIVE_MODE) 67690267Sdes goto ouch; 67790267Sdes break; 67890267Sdes case AF_INET6: 679174588Sdes if ((e = ftp_cmd(conn, "EPSV")) != FTP_EPASSIVE_MODE) { 68090267Sdes if (e == -1) 68190267Sdes goto ouch; 682174588Sdes if ((e = ftp_cmd(conn, "LPSV")) != 68397856Sdes FTP_LPASSIVE_MODE) 68490267Sdes goto ouch; 68590267Sdes } 68690267Sdes break; 68790267Sdes default: 68890267Sdes e = FTP_PROTOCOL_ERROR; /* XXX: error code should be prepared */ 68990267Sdes goto ouch; 69090267Sdes } 69137573Sdes 69290267Sdes /* 69390267Sdes * Find address and port number. The reply to the PASV command 69490267Sdes * is IMHO the one and only weak point in the FTP protocol. 69590267Sdes */ 69697856Sdes ln = conn->buf; 69790267Sdes switch (e) { 69890267Sdes case FTP_PASSIVE_MODE: 69990267Sdes case FTP_LPASSIVE_MODE: 700174761Sdes for (p = ln + 3; *p && !isdigit((unsigned char)*p); p++) 70190267Sdes /* nothing */ ; 70290267Sdes if (!*p) { 70390267Sdes e = FTP_PROTOCOL_ERROR; 70490267Sdes goto ouch; 70590267Sdes } 70690267Sdes l = (e == FTP_PASSIVE_MODE ? 6 : 21); 70790267Sdes for (i = 0; *p && i < l; i++, p++) 70890267Sdes addr[i] = strtol(p, &p, 10); 70990267Sdes if (i < l) { 71090267Sdes e = FTP_PROTOCOL_ERROR; 71190267Sdes goto ouch; 71290267Sdes } 71390267Sdes break; 71490267Sdes case FTP_EPASSIVE_MODE: 71590267Sdes for (p = ln + 3; *p && *p != '('; p++) 71690267Sdes /* nothing */ ; 71790267Sdes if (!*p) { 71890267Sdes e = FTP_PROTOCOL_ERROR; 71990267Sdes goto ouch; 72090267Sdes } 72190267Sdes ++p; 72290267Sdes if (sscanf(p, "%c%c%c%d%c", &addr[0], &addr[1], &addr[2], 72390267Sdes &port, &addr[3]) != 5 || 72490267Sdes addr[0] != addr[1] || 72590267Sdes addr[0] != addr[2] || addr[0] != addr[3]) { 72690267Sdes e = FTP_PROTOCOL_ERROR; 72790267Sdes goto ouch; 72890267Sdes } 72990267Sdes break; 73090267Sdes } 73160188Sdes 73290267Sdes /* seek to required offset */ 73390267Sdes if (offset) 734174588Sdes if (ftp_cmd(conn, "REST %lu", (u_long)offset) != FTP_FILE_OK) 73590267Sdes goto sysouch; 73690267Sdes 73790267Sdes /* construct sockaddr for data socket */ 738109967Sdes l = sizeof(sa); 73997856Sdes if (getpeername(conn->sd, (struct sockaddr *)&sa, &l) == -1) 74090267Sdes goto sysouch; 74190267Sdes if (sa.ss_family == AF_INET6) 74290267Sdes unmappedaddr((struct sockaddr_in6 *)&sa); 74390267Sdes switch (sa.ss_family) { 74490267Sdes case AF_INET6: 74590267Sdes sin6 = (struct sockaddr_in6 *)&sa; 74690267Sdes if (e == FTP_EPASSIVE_MODE) 74790267Sdes sin6->sin6_port = htons(port); 74890267Sdes else { 74990267Sdes bcopy(addr + 2, (char *)&sin6->sin6_addr, 16); 75090267Sdes bcopy(addr + 19, (char *)&sin6->sin6_port, 2); 75190267Sdes } 75290267Sdes break; 75390267Sdes case AF_INET: 75490267Sdes sin4 = (struct sockaddr_in *)&sa; 75590267Sdes if (e == FTP_EPASSIVE_MODE) 75690267Sdes sin4->sin_port = htons(port); 75790267Sdes else { 75890267Sdes bcopy(addr, (char *)&sin4->sin_addr, 4); 75990267Sdes bcopy(addr + 4, (char *)&sin4->sin_port, 2); 76090267Sdes } 76190267Sdes break; 76290267Sdes default: 76390267Sdes e = FTP_PROTOCOL_ERROR; /* XXX: error code should be prepared */ 76490267Sdes break; 76590267Sdes } 76690267Sdes 76790267Sdes /* connect to data port */ 76890267Sdes if (verbose) 769174588Sdes fetch_info("opening data connection"); 770159566Sdes bindaddr = getenv("FETCH_BIND_ADDRESS"); 771159566Sdes if (bindaddr != NULL && *bindaddr != '\0' && 772174588Sdes fetch_bind(sd, sa.ss_family, bindaddr) != 0) 773159566Sdes goto sysouch; 77490267Sdes if (connect(sd, (struct sockaddr *)&sa, sa.ss_len) == -1) 77590267Sdes goto sysouch; 77690267Sdes 77790267Sdes /* make the server initiate the transfer */ 77890267Sdes if (verbose) 779174588Sdes fetch_info("initiating transfer"); 780174588Sdes e = ftp_cmd(conn, "%s %.*s", oper, filenamelen, filename); 78190267Sdes if (e != FTP_CONNECTION_ALREADY_OPEN && e != FTP_OPEN_DATA_CONNECTION) 78290267Sdes goto ouch; 78390267Sdes 78490267Sdes } else { 78590267Sdes u_int32_t a; 78690267Sdes u_short p; 78790267Sdes int arg, d; 78890267Sdes char *ap; 78990267Sdes char hname[INET6_ADDRSTRLEN]; 79090267Sdes 79190267Sdes switch (sa.ss_family) { 79290267Sdes case AF_INET6: 79390267Sdes ((struct sockaddr_in6 *)&sa)->sin6_port = 0; 79460737Sume#ifdef IPV6_PORTRANGE 79590267Sdes arg = low ? IPV6_PORTRANGE_DEFAULT : IPV6_PORTRANGE_HIGH; 79690267Sdes if (setsockopt(sd, IPPROTO_IPV6, IPV6_PORTRANGE, 79790267Sdes (char *)&arg, sizeof(arg)) == -1) 79890267Sdes goto sysouch; 79960737Sume#endif 80090267Sdes break; 80190267Sdes case AF_INET: 80290267Sdes ((struct sockaddr_in *)&sa)->sin_port = 0; 80390267Sdes arg = low ? IP_PORTRANGE_DEFAULT : IP_PORTRANGE_HIGH; 80490267Sdes if (setsockopt(sd, IPPROTO_IP, IP_PORTRANGE, 805109967Sdes (char *)&arg, sizeof(arg)) == -1) 80690267Sdes goto sysouch; 80790267Sdes break; 80890267Sdes } 80990267Sdes if (verbose) 810174588Sdes fetch_info("binding data socket"); 81190267Sdes if (bind(sd, (struct sockaddr *)&sa, sa.ss_len) == -1) 81290267Sdes goto sysouch; 81390267Sdes if (listen(sd, 1) == -1) 81490267Sdes goto sysouch; 81537573Sdes 81690267Sdes /* find what port we're on and tell the server */ 81790267Sdes if (getsockname(sd, (struct sockaddr *)&sa, &l) == -1) 81890267Sdes goto sysouch; 81990267Sdes switch (sa.ss_family) { 82090267Sdes case AF_INET: 82190267Sdes sin4 = (struct sockaddr_in *)&sa; 82290267Sdes a = ntohl(sin4->sin_addr.s_addr); 82390267Sdes p = ntohs(sin4->sin_port); 824174588Sdes e = ftp_cmd(conn, "PORT %d,%d,%d,%d,%d,%d", 82590267Sdes (a >> 24) & 0xff, (a >> 16) & 0xff, 82690267Sdes (a >> 8) & 0xff, a & 0xff, 82790267Sdes (p >> 8) & 0xff, p & 0xff); 82890267Sdes break; 82990267Sdes case AF_INET6: 83060737Sume#define UC(b) (((int)b)&0xff) 83190267Sdes e = -1; 83290267Sdes sin6 = (struct sockaddr_in6 *)&sa; 83399253Sume sin6->sin6_scope_id = 0; 83490267Sdes if (getnameinfo((struct sockaddr *)&sa, sa.ss_len, 83590267Sdes hname, sizeof(hname), 83690267Sdes NULL, 0, NI_NUMERICHOST) == 0) { 837174588Sdes e = ftp_cmd(conn, "EPRT |%d|%s|%d|", 2, hname, 83890267Sdes htons(sin6->sin6_port)); 83990267Sdes if (e == -1) 84090267Sdes goto ouch; 84190267Sdes } 84290267Sdes if (e != FTP_OK) { 84390267Sdes ap = (char *)&sin6->sin6_addr; 844174588Sdes e = ftp_cmd(conn, 84590267Sdes "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d", 84690267Sdes 6, 16, 84790267Sdes UC(ap[0]), UC(ap[1]), UC(ap[2]), UC(ap[3]), 84890267Sdes UC(ap[4]), UC(ap[5]), UC(ap[6]), UC(ap[7]), 84990267Sdes UC(ap[8]), UC(ap[9]), UC(ap[10]), UC(ap[11]), 85090267Sdes UC(ap[12]), UC(ap[13]), UC(ap[14]), UC(ap[15]), 85190267Sdes 2, 85290267Sdes (ntohs(sin6->sin6_port) >> 8) & 0xff, 85390267Sdes ntohs(sin6->sin6_port) & 0xff); 85490267Sdes } 85590267Sdes break; 85690267Sdes default: 85790267Sdes e = FTP_PROTOCOL_ERROR; /* XXX: error code should be prepared */ 85890267Sdes goto ouch; 85990267Sdes } 86090267Sdes if (e != FTP_OK) 86190267Sdes goto ouch; 86290267Sdes 86390267Sdes /* seek to required offset */ 86490267Sdes if (offset) 865174588Sdes if (ftp_cmd(conn, "REST %ju", (uintmax_t)offset) != FTP_FILE_OK) 86690267Sdes goto sysouch; 86790267Sdes 86890267Sdes /* make the server initiate the transfer */ 86990267Sdes if (verbose) 870174588Sdes fetch_info("initiating transfer"); 871174588Sdes e = ftp_cmd(conn, "%s %.*s", oper, filenamelen, filename); 872119123Sdes if (e != FTP_CONNECTION_ALREADY_OPEN && e != FTP_OPEN_DATA_CONNECTION) 87390267Sdes goto ouch; 87490267Sdes 87590267Sdes /* accept the incoming connection and go to town */ 87690267Sdes if ((d = accept(sd, NULL, NULL)) == -1) 87790267Sdes goto sysouch; 87890267Sdes close(sd); 87990267Sdes sd = d; 88060737Sume } 88137573Sdes 882174588Sdes if ((df = ftp_setup(conn, fetch_reopen(sd), mode)) == NULL) 88362256Sdes goto sysouch; 88490267Sdes return (df); 88537573Sdes 88637573Sdessysouch: 887174588Sdes fetch_syserr(); 88890267Sdes if (sd >= 0) 88990267Sdes close(sd); 89090267Sdes return (NULL); 89141869Sdes 89237573Sdesouch: 89390267Sdes if (e != -1) 894174588Sdes ftp_seterr(e); 89590267Sdes if (sd >= 0) 89690267Sdes close(sd); 89790267Sdes return (NULL); 89837535Sdes} 89937535Sdes 90037571Sdes/* 90177238Sdes * Authenticate 90277238Sdes */ 90377238Sdesstatic int 904174588Sdesftp_authenticate(conn_t *conn, struct url *url, struct url *purl) 90577238Sdes{ 90690267Sdes const char *user, *pwd, *logname; 90790267Sdes char pbuf[MAXHOSTNAMELEN + MAXLOGNAME + 1]; 90890267Sdes int e, len; 90977238Sdes 91090267Sdes /* XXX FTP_AUTH, and maybe .netrc */ 91190267Sdes 91290267Sdes /* send user name and password */ 913109697Sdes if (url->user[0] == '\0') 914174588Sdes fetch_netrc_auth(url); 91590267Sdes user = url->user; 916109697Sdes if (*user == '\0') 91790267Sdes user = getenv("FTP_LOGIN"); 918109697Sdes if (user == NULL || *user == '\0') 91990267Sdes user = FTP_ANONYMOUS_USER; 920174588Sdes if (purl && url->port == fetch_default_port(url->scheme)) 921174588Sdes e = ftp_cmd(conn, "USER %s@%s", user, url->host); 92290267Sdes else if (purl) 923174588Sdes e = ftp_cmd(conn, "USER %s@%s@%d", user, url->host, url->port); 92490267Sdes else 925174588Sdes e = ftp_cmd(conn, "USER %s", user); 92690267Sdes 92790267Sdes /* did the server request a password? */ 92890267Sdes if (e == FTP_NEED_PASSWORD) { 92990267Sdes pwd = url->pwd; 930109697Sdes if (*pwd == '\0') 93190267Sdes pwd = getenv("FTP_PASSWORD"); 932109697Sdes if (pwd == NULL || *pwd == '\0') { 93390267Sdes if ((logname = getlogin()) == 0) 93490267Sdes logname = FTP_ANONYMOUS_USER; 93590267Sdes if ((len = snprintf(pbuf, MAXLOGNAME + 1, "%s@", logname)) < 0) 93690267Sdes len = 0; 93790267Sdes else if (len > MAXLOGNAME) 93890267Sdes len = MAXLOGNAME; 939109967Sdes gethostname(pbuf + len, sizeof(pbuf) - len); 94090267Sdes pwd = pbuf; 94190267Sdes } 942174588Sdes e = ftp_cmd(conn, "PASS %s", pwd); 94377238Sdes } 94490267Sdes 94590267Sdes return (e); 94677238Sdes} 94777238Sdes 94877238Sdes/* 94937571Sdes * Log on to FTP server 95037535Sdes */ 95197856Sdesstatic conn_t * 952174588Sdesftp_connect(struct url *url, struct url *purl, const char *flags) 95337571Sdes{ 95497856Sdes conn_t *conn; 95597856Sdes int e, direct, verbose; 95660737Sume#ifdef INET6 95790267Sdes int af = AF_UNSPEC; 95860737Sume#else 95990267Sdes int af = AF_INET; 96060737Sume#endif 96137571Sdes 96290267Sdes direct = CHECK_FLAG('d'); 96390267Sdes verbose = CHECK_FLAG('v'); 96490267Sdes if (CHECK_FLAG('4')) 96590267Sdes af = AF_INET; 96690267Sdes else if (CHECK_FLAG('6')) 96790267Sdes af = AF_INET6; 96860737Sume 96990267Sdes if (direct) 97090267Sdes purl = NULL; 97137608Sdes 97290267Sdes /* check for proxy */ 97390267Sdes if (purl) { 97490267Sdes /* XXX proxy authentication! */ 975174588Sdes conn = fetch_connect(purl->host, purl->port, af, verbose); 97690267Sdes } else { 97790267Sdes /* no proxy, go straight to target */ 978174588Sdes conn = fetch_connect(url->host, url->port, af, verbose); 97990267Sdes purl = NULL; 98090267Sdes } 98137608Sdes 98290267Sdes /* check connection */ 983103459Sfenner if (conn == NULL) 984174588Sdes /* fetch_connect() has already set an error code */ 98590267Sdes return (NULL); 98690267Sdes 98790267Sdes /* expect welcome message */ 988174588Sdes if ((e = ftp_chkerr(conn)) != FTP_SERVICE_READY) 98990267Sdes goto fouch; 99090267Sdes 99190267Sdes /* authenticate */ 992174588Sdes if ((e = ftp_authenticate(conn, url, purl)) != FTP_LOGGED_IN) 99390267Sdes goto fouch; 99490267Sdes 995168960Snjl /* TODO: Request extended features supported, if any (RFC 3659). */ 996168960Snjl 99790267Sdes /* done */ 99897856Sdes return (conn); 99990267Sdes 100037571Sdesfouch: 100190267Sdes if (e != -1) 1002174588Sdes ftp_seterr(e); 1003174588Sdes fetch_close(conn); 100490267Sdes return (NULL); 100537571Sdes} 100637571Sdes 100737571Sdes/* 100837571Sdes * Disconnect from server 100937571Sdes */ 101037571Sdesstatic void 1011174588Sdesftp_disconnect(conn_t *conn) 101237571Sdes{ 1013174588Sdes (void)ftp_cmd(conn, "QUIT"); 1014105903Snjl if (conn == cached_connection && conn->ref == 1) 1015105903Snjl cached_connection = NULL; 1016174588Sdes fetch_close(conn); 101737571Sdes} 101837571Sdes 101937571Sdes/* 102037571Sdes * Check if we're already connected 102137571Sdes */ 102237571Sdesstatic int 1023174588Sdesftp_isconnected(struct url *url) 102437571Sdes{ 102597856Sdes return (cached_connection 102637571Sdes && (strcmp(url->host, cached_host.host) == 0) 102737571Sdes && (strcmp(url->user, cached_host.user) == 0) 102837571Sdes && (strcmp(url->pwd, cached_host.pwd) == 0) 102937571Sdes && (url->port == cached_host.port)); 103037571Sdes} 103137571Sdes 103237608Sdes/* 103341869Sdes * Check the cache, reconnect if no luck 103437608Sdes */ 103597856Sdesstatic conn_t * 1036174588Sdesftp_cached_connect(struct url *url, struct url *purl, const char *flags) 103737535Sdes{ 103897856Sdes conn_t *conn; 103997856Sdes int e; 104037535Sdes 104190267Sdes /* set default port */ 104290267Sdes if (!url->port) 1043174588Sdes url->port = fetch_default_port(url->scheme); 104490267Sdes 104590267Sdes /* try to use previously cached connection */ 1046174588Sdes if (ftp_isconnected(url)) { 1047174588Sdes e = ftp_cmd(cached_connection, "NOOP"); 104890267Sdes if (e == FTP_OK || e == FTP_SYNTAX_ERROR) 1049174588Sdes return (fetch_ref(cached_connection)); 105090267Sdes } 105190267Sdes 105290267Sdes /* connect to server */ 1053174588Sdes if ((conn = ftp_connect(url, purl, flags)) == NULL) 105497856Sdes return (NULL); 105597856Sdes if (cached_connection) 1056174588Sdes ftp_disconnect(cached_connection); 1057174588Sdes cached_connection = fetch_ref(conn); 1058109967Sdes memcpy(&cached_host, url, sizeof(*url)); 105997856Sdes return (conn); 106037535Sdes} 106137535Sdes 106237571Sdes/* 106367043Sdes * Check the proxy settings 106463713Sdes */ 106567043Sdesstatic struct url * 1066174752Sdesftp_get_proxy(struct url * url, const char *flags) 106763713Sdes{ 106890267Sdes struct url *purl; 106990267Sdes char *p; 107090267Sdes 1071112420Smtm if (flags != NULL && strchr(flags, 'd') != NULL) 1072112081Sdes return (NULL); 1073174752Sdes if (fetch_no_proxy_match(url->host)) 1074174752Sdes return (NULL); 107590267Sdes if (((p = getenv("FTP_PROXY")) || (p = getenv("ftp_proxy")) || 107690267Sdes (p = getenv("HTTP_PROXY")) || (p = getenv("http_proxy"))) && 107790267Sdes *p && (purl = fetchParseURL(p)) != NULL) { 107890267Sdes if (!*purl->scheme) { 107990267Sdes if (getenv("FTP_PROXY") || getenv("ftp_proxy")) 108090267Sdes strcpy(purl->scheme, SCHEME_FTP); 108190267Sdes else 108290267Sdes strcpy(purl->scheme, SCHEME_HTTP); 108390267Sdes } 108490267Sdes if (!purl->port) 1085174588Sdes purl->port = fetch_default_proxy_port(purl->scheme); 108690267Sdes if (strcasecmp(purl->scheme, SCHEME_FTP) == 0 || 108790267Sdes strcasecmp(purl->scheme, SCHEME_HTTP) == 0) 108890267Sdes return (purl); 108990267Sdes fetchFreeURL(purl); 109069272Sdes } 109190267Sdes return (NULL); 109263713Sdes} 109363713Sdes 109463713Sdes/* 109587315Sdes * Process an FTP request 109637571Sdes */ 109737535SdesFILE * 1098174588Sdesftp_request(struct url *url, const char *op, struct url_stat *us, 109990267Sdes struct url *purl, const char *flags) 110037608Sdes{ 110197856Sdes conn_t *conn; 110297856Sdes int oflag; 110390267Sdes 110490267Sdes /* check if we should use HTTP instead */ 110590267Sdes if (purl && strcasecmp(purl->scheme, SCHEME_HTTP) == 0) { 110690267Sdes if (strcmp(op, "STAT") == 0) 1107174588Sdes return (http_request(url, "HEAD", us, purl, flags)); 110890267Sdes else if (strcmp(op, "RETR") == 0) 1109174588Sdes return (http_request(url, "GET", us, purl, flags)); 111090267Sdes /* 111190267Sdes * Our HTTP code doesn't support PUT requests yet, so try 111290267Sdes * a direct connection. 111390267Sdes */ 111490267Sdes } 111590267Sdes 111690267Sdes /* connect to server */ 1117174588Sdes conn = ftp_cached_connect(url, purl, flags); 111890267Sdes if (purl) 111990267Sdes fetchFreeURL(purl); 112097856Sdes if (conn == NULL) 112190267Sdes return (NULL); 112290267Sdes 112390267Sdes /* change directory */ 1124174588Sdes if (ftp_cwd(conn, url->doc) == -1) 112590267Sdes return (NULL); 112690267Sdes 112790267Sdes /* stat file */ 1128174588Sdes if (us && ftp_stat(conn, url->doc, us) == -1 112990267Sdes && fetchLastErrCode != FETCH_PROTO 113090267Sdes && fetchLastErrCode != FETCH_UNAVAIL) 113190267Sdes return (NULL); 113290267Sdes 113390267Sdes /* just a stat */ 113487315Sdes if (strcmp(op, "STAT") == 0) 113590267Sdes return (FILE *)1; /* bogus return value */ 113690267Sdes if (strcmp(op, "STOR") == 0 || strcmp(op, "APPE") == 0) 113790267Sdes oflag = O_WRONLY; 113890267Sdes else 113990267Sdes oflag = O_RDONLY; 114087315Sdes 114190267Sdes /* initiate the transfer */ 1142174588Sdes return (ftp_transfer(conn, op, url->doc, oflag, url->offset, flags)); 114337608Sdes} 114437608Sdes 114541869Sdes/* 114687315Sdes * Get and stat file 114787315Sdes */ 114887315SdesFILE * 114987315SdesfetchXGetFTP(struct url *url, struct url_stat *us, const char *flags) 115087315Sdes{ 1151174752Sdes return (ftp_request(url, "RETR", us, ftp_get_proxy(url, flags), flags)); 115287315Sdes} 115387315Sdes 115487315Sdes/* 115563340Sdes * Get file 115663340Sdes */ 115763340SdesFILE * 115875891SarchiefetchGetFTP(struct url *url, const char *flags) 115963340Sdes{ 116090267Sdes return (fetchXGetFTP(url, NULL, flags)); 116163340Sdes} 116263340Sdes 116363340Sdes/* 116441869Sdes * Put file 116541869Sdes */ 116637608SdesFILE * 116775891SarchiefetchPutFTP(struct url *url, const char *flags) 116837535Sdes{ 1169174588Sdes return (ftp_request(url, CHECK_FLAG('a') ? "APPE" : "STOR", NULL, 1170174752Sdes ftp_get_proxy(url, flags), flags)); 117137535Sdes} 117240975Sdes 117341869Sdes/* 117441869Sdes * Get file stats 117541869Sdes */ 117640975Sdesint 117775891SarchiefetchStatFTP(struct url *url, struct url_stat *us, const char *flags) 117840975Sdes{ 1179112081Sdes FILE *f; 118090267Sdes 1181174752Sdes f = ftp_request(url, "STAT", us, ftp_get_proxy(url, flags), flags); 1182112081Sdes if (f == NULL) 118390267Sdes return (-1); 1184174752Sdes fclose(f); 118590267Sdes return (0); 118640975Sdes} 118741989Sdes 118841989Sdes/* 118941989Sdes * List a directory 119041989Sdes */ 119141989Sdesstruct url_ent * 119285093SdesfetchListFTP(struct url *url __unused, const char *flags __unused) 119341989Sdes{ 119490267Sdes warnx("fetchListFTP(): not implemented"); 119590267Sdes return (NULL); 119641989Sdes} 1197