diff options
Diffstat (limited to 'lib/libfetch/ftp.c')
| -rw-r--r-- | lib/libfetch/ftp.c | 1179 |
1 files changed, 0 insertions, 1179 deletions
diff --git a/lib/libfetch/ftp.c b/lib/libfetch/ftp.c deleted file mode 100644 index a28ec2db..00000000 --- a/lib/libfetch/ftp.c +++ /dev/null @@ -1,1179 +0,0 @@ -/*- - * Copyright (c) 1998-2004 Dag-Erling Coïdan Smørgrav - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer - * in this position and unchanged. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#define _GNU_SOURCE - -#include <sys/cdefs.h> - -/* - * Portions of this code were taken from or based on ftpio.c: - * - * ---------------------------------------------------------------------------- - * "THE BEER-WARE LICENSE" (Revision 42): - * <phk@FreeBSD.org> wrote this file. As long as you retain this notice you - * can do whatever you want with this stuff. If we meet some day, and you think - * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp - * ---------------------------------------------------------------------------- - * - * Major Changelog: - * - * Dag-Erling Coïdan Smørgrav - * 9 Jun 1998 - * - * Incorporated into libfetch - * - * Jordan K. Hubbard - * 17 Jan 1996 - * - * Turned inside out. Now returns xfers as new file ids, not as a special - * `state' of FTP_t - * - * $ftpioId: ftpio.c,v 1.30 1998/04/11 07:28:53 phk Exp $ - * - */ - -#include <sys/param.h> -#include <sys/socket.h> -#include <netinet/in.h> - -#include <ctype.h> -#include <libio.h> -#include <err.h> -#include <errno.h> -#include <fcntl.h> -#include <netdb.h> -#include <stdarg.h> -#include <stdint.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <time.h> -#include <unistd.h> - -#include "fetch.h" -#include "common.h" -#include "ftperr.h" - -#define FTP_ANONYMOUS_USER "anonymous" - -#define FTP_CONNECTION_ALREADY_OPEN 125 -#define FTP_OPEN_DATA_CONNECTION 150 -#define FTP_OK 200 -#define FTP_FILE_STATUS 213 -#define FTP_SERVICE_READY 220 -#define FTP_TRANSFER_COMPLETE 226 -#define FTP_PASSIVE_MODE 227 -#define FTP_LPASSIVE_MODE 228 -#define FTP_EPASSIVE_MODE 229 -#define FTP_LOGGED_IN 230 -#define FTP_FILE_ACTION_OK 250 -#define FTP_DIRECTORY_CREATED 257 /* multiple meanings */ -#define FTP_FILE_CREATED 257 /* multiple meanings */ -#define FTP_WORKING_DIRECTORY 257 /* multiple meanings */ -#define FTP_NEED_PASSWORD 331 -#define FTP_NEED_ACCOUNT 332 -#define FTP_FILE_OK 350 -#define FTP_SYNTAX_ERROR 500 -#define FTP_PROTOCOL_ERROR 999 - -static struct url cached_host; -static conn_t *cached_connection; - -#define isftpreply(foo) (isdigit(foo[0]) && isdigit(foo[1]) \ - && isdigit(foo[2]) \ - && (foo[3] == ' ' || foo[3] == '\0')) -#define isftpinfo(foo) (isdigit(foo[0]) && isdigit(foo[1]) \ - && isdigit(foo[2]) && foo[3] == '-') - -/* - * Translate IPv4 mapped IPv6 address to IPv4 address - */ -static void -unmappedaddr(struct sockaddr_in6 *sin6) -{ - struct sockaddr_in *sin4; - u_int32_t addr; - int port; - - if (sin6->sin6_family != AF_INET6 || - !IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) - return; - sin4 = (struct sockaddr_in *)sin6; - addr = *(u_int32_t *)&sin6->sin6_addr.s6_addr[12]; - port = sin6->sin6_port; - memset(sin4, 0, sizeof(struct sockaddr_in)); - sin4->sin_addr.s_addr = addr; - sin4->sin_port = port; - sin4->sin_family = AF_INET; - //sin6->sin_len = sizeof(struct sockaddr_in); -} - -/* - * Get server response - */ -static int -_ftp_chkerr(conn_t *conn) -{ - if (_fetch_getln(conn) == -1) { - _fetch_syserr(); - return (-1); - } - if (isftpinfo(conn->buf)) { - while (conn->buflen && !isftpreply(conn->buf)) { - if (_fetch_getln(conn) == -1) { - _fetch_syserr(); - return (-1); - } - } - } - - while (conn->buflen && isspace(conn->buf[conn->buflen - 1])) - conn->buflen--; - conn->buf[conn->buflen] = '\0'; - - if (!isftpreply(conn->buf)) { - _ftp_seterr(FTP_PROTOCOL_ERROR); - return (-1); - } - - conn->err = (conn->buf[0] - '0') * 100 - + (conn->buf[1] - '0') * 10 - + (conn->buf[2] - '0'); - - return (conn->err); -} - -/* - * Send a command and check reply - */ -static int -_ftp_cmd(conn_t *conn, const char *fmt, ...) -{ - va_list ap; - size_t len; - char *msg; - int r; - - va_start(ap, fmt); - len = vasprintf(&msg, fmt, ap); - va_end(ap); - - if (msg == NULL) { - errno = ENOMEM; - _fetch_syserr(); - return (-1); - } - - r = _fetch_putln(conn, msg, len); - free(msg); - - if (r == -1) { - _fetch_syserr(); - return (-1); - } - - return (_ftp_chkerr(conn)); -} - -/* - * Return a pointer to the filename part of a path - */ -static const char * -_ftp_filename(const char *file, int *len, int *type) -{ - const char *s; - - if ((s = strrchr(file, '/')) == NULL) - s = file; - else - s = s + 1; - *len = strlen(s); - if (*len > 7 && strncmp(s + *len - 7, ";type=", 6) == 0) { - *type = s[*len - 1]; - *len -= 7; - } else { - *type = '\0'; - } - return (s); -} - -/* - * Get current working directory from the reply to a CWD, PWD or CDUP - * command. - */ -static int -_ftp_pwd(conn_t *conn, char *pwd, size_t pwdlen) -{ - char *src, *dst, *end; - int q; - - if (conn->err != FTP_WORKING_DIRECTORY && - conn->err != FTP_FILE_ACTION_OK) - return (FTP_PROTOCOL_ERROR); - end = conn->buf + conn->buflen; - src = conn->buf + 4; - if (src >= end || *src++ != '"') - return (FTP_PROTOCOL_ERROR); - for (q = 0, dst = pwd; src < end && pwdlen--; ++src) { - if (!q && *src == '"') - q = 1; - else if (q && *src != '"') - break; - else if (q) - *dst++ = '"', q = 0; - else - *dst++ = *src; - } - if (!pwdlen) - return (FTP_PROTOCOL_ERROR); - *dst = '\0'; -#if 0 - DEBUG(fprintf(stderr, "pwd: [%s]\n", pwd)); -#endif - return (FTP_OK); -} - -/* - * Change working directory to the directory that contains the specified - * file. - */ -static int -_ftp_cwd(conn_t *conn, const char *file) -{ - const char *beg, *end; - char pwd[PATH_MAX]; - int e, i, len; - - if ((end = strrchr(file, '/')) == NULL) - return (0); - if ((e = _ftp_cmd(conn, "PWD")) != FTP_WORKING_DIRECTORY || - (e = _ftp_pwd(conn, pwd, sizeof(pwd))) != FTP_OK) { - _ftp_seterr(e); - return (-1); - } - for (;;) { - len = strlen(pwd); - /* look for a common prefix */ - for (i = 0; i <= len && i <= end - file; ++i) - if (pwd[i] != file[i]) - break; -#if 0 - DEBUG(fprintf(stderr, "have: [%.*s|%s]\n", i, pwd, pwd + i)); - DEBUG(fprintf(stderr, "want: [%.*s|%s]\n", i, file, file + i)); -#endif - if (pwd[i] == '\0' && (file[i - 1] == '/' || file[i] == '/')) - break; - if ((e = _ftp_cmd(conn, "CDUP")) != FTP_FILE_ACTION_OK || - (e = _ftp_cmd(conn, "PWD")) != FTP_WORKING_DIRECTORY || - (e = _ftp_pwd(conn, pwd, sizeof(pwd))) != FTP_OK) { - _ftp_seterr(e); - return (-1); - } - } - for (beg = file + i; beg < end; beg = file + i + 1) { - while (*beg == '/') - ++beg, ++i; - for (++i; file + i < end && file[i] != '/'; ++i) - /* nothing */; - e = _ftp_cmd(conn, "CWD %.*s", file + i - beg, beg); - if (e != FTP_FILE_ACTION_OK) { - _ftp_seterr(e); - return (-1); - } - } - return (0); -} - -/* - * Set transfer mode and data type - */ -static int -_ftp_mode_type(conn_t *conn, int mode, int type) -{ - int e; - - switch (mode) { - case 0: - case 's': - mode = 'S'; - case 'S': - break; - default: - return (FTP_PROTOCOL_ERROR); - } - if ((e = _ftp_cmd(conn, "MODE %c", mode)) != FTP_OK) { - if (mode == 'S') { - /* - * Stream mode is supposed to be the default - so - * much so that some servers not only do not - * support any other mode, but do not support the - * MODE command at all. - * - * If "MODE S" fails, it is unlikely that we - * previously succeeded in setting a different - * mode. Therefore, we simply hope that the - * server is already in the correct mode, and - * silently ignore the failure. - */ - } else { - return (e); - } - } - - switch (type) { - case 0: - case 'i': - type = 'I'; - case 'I': - break; - case 'a': - type = 'A'; - case 'A': - break; - case 'd': - type = 'D'; - case 'D': - /* can't handle yet */ - default: - return (FTP_PROTOCOL_ERROR); - } - if ((e = _ftp_cmd(conn, "TYPE %c", type)) != FTP_OK) - return (e); - - return (FTP_OK); -} - -/* - * Request and parse file stats - */ -static int -_ftp_stat(conn_t *conn, const char *file, struct url_stat *us) -{ - char *ln; - const char *filename; - int filenamelen, type; - struct tm tm; - time_t t; - int e; - - us->size = -1; - us->atime = us->mtime = 0; - - filename = _ftp_filename(file, &filenamelen, &type); - - if ((e = _ftp_mode_type(conn, 0, type)) != FTP_OK) { - _ftp_seterr(e); - return (-1); - } - - e = _ftp_cmd(conn, "SIZE %.*s", filenamelen, filename); - if (e != FTP_FILE_STATUS) { - _ftp_seterr(e); - return (-1); - } - for (ln = conn->buf + 4; *ln && isspace(*ln); ln++) - /* nothing */ ; - for (us->size = 0; *ln && isdigit(*ln); ln++) - us->size = us->size * 10 + *ln - '0'; - if (*ln && !isspace(*ln)) { - _ftp_seterr(FTP_PROTOCOL_ERROR); - us->size = -1; - return (-1); - } - if (us->size == 0) - us->size = -1; - DEBUG(fprintf(stderr, "size: [%lld]\n", (long long)us->size)); - - e = _ftp_cmd(conn, "MDTM %.*s", filenamelen, filename); - if (e != FTP_FILE_STATUS) { - _ftp_seterr(e); - return (-1); - } - for (ln = conn->buf + 4; *ln && isspace(*ln); ln++) - /* nothing */ ; - switch (strspn(ln, "0123456789")) { - case 14: - break; - case 15: - ln++; - ln[0] = '2'; - ln[1] = '0'; - break; - default: - _ftp_seterr(FTP_PROTOCOL_ERROR); - return (-1); - } - if (sscanf(ln, "%04d%02d%02d%02d%02d%02d", - &tm.tm_year, &tm.tm_mon, &tm.tm_mday, - &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) { - _ftp_seterr(FTP_PROTOCOL_ERROR); - return (-1); - } - tm.tm_mon--; - tm.tm_year -= 1900; - tm.tm_isdst = -1; - t = timegm(&tm); - if (t == (time_t)-1) - t = time(NULL); - us->mtime = t; - us->atime = t; - DEBUG(fprintf(stderr, - "last modified: [%04d-%02d-%02d %02d:%02d:%02d]\n", - tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, - tm.tm_hour, tm.tm_min, tm.tm_sec)); - return (0); -} - -/* - * I/O functions for FTP - */ -struct ftpio { - conn_t *cconn; /* Control connection */ - conn_t *dconn; /* Data connection */ - int dir; /* Direction */ - int eof; /* EOF reached */ - int err; /* Error code */ -}; - -static int _ftp_readfn(void *, char *, int); -static int _ftp_writefn(void *, const char *, int); -static fpos_t _ftp_seekfn(void *, fpos_t, int); -static int _ftp_closefn(void *); - -static int -_ftp_readfn(void *v, char *buf, int len) -{ - struct ftpio *io; - int r; - - io = (struct ftpio *)v; - if (io == NULL) { - errno = EBADF; - return (-1); - } - if (io->cconn == NULL || io->dconn == NULL || io->dir == O_WRONLY) { - errno = EBADF; - return (-1); - } - if (io->err) { - errno = io->err; - return (-1); - } - if (io->eof) - return (0); - r = _fetch_read(io->dconn, buf, len); - if (r > 0) - return (r); - if (r == 0) { - io->eof = 1; - return (0); - } - if (errno != EINTR) - io->err = errno; - return (-1); -} - -static int -_ftp_writefn(void *v, const char *buf, int len) -{ - struct ftpio *io; - int w; - - io = (struct ftpio *)v; - if (io == NULL) { - errno = EBADF; - return (-1); - } - if (io->cconn == NULL || io->dconn == NULL || io->dir == O_RDONLY) { - errno = EBADF; - return (-1); - } - if (io->err) { - errno = io->err; - return (-1); - } - w = _fetch_write(io->dconn, buf, len); - if (w >= 0) - return (w); - if (errno != EINTR) - io->err = errno; - return (-1); -} - -static fpos_t -_ftp_seekfn(void *v, fpos_t pos, int whence) -{ - fpos_t invalid = {0}; - struct ftpio *io; - - io = (struct ftpio *)v; - if (io == NULL) { - errno = EBADF; - return invalid; - } - errno = ESPIPE; - return invalid; -} - -static int -_ftp_closefn(void *v) -{ - struct ftpio *io; - int r; - - io = (struct ftpio *)v; - if (io == NULL) { - errno = EBADF; - return (-1); - } - if (io->dir == -1) - return (0); - if (io->cconn == NULL || io->dconn == NULL) { - errno = EBADF; - return (-1); - } - _fetch_close(io->dconn); - io->dir = -1; - io->dconn = NULL; - DEBUG(fprintf(stderr, "Waiting for final status\n")); - r = _ftp_chkerr(io->cconn); - if (io->cconn == cached_connection && io->cconn->ref == 1) - cached_connection = NULL; - _fetch_close(io->cconn); - free(io); - return (r == FTP_TRANSFER_COMPLETE) ? 0 : -1; -} - -static FILE * -_ftp_setup(conn_t *cconn, conn_t *dconn, int mode) -{ - struct ftpio *io; - FILE *f; - - if (cconn == NULL || dconn == NULL) - return (NULL); - if ((io = malloc(sizeof(*io))) == NULL) - return (NULL); - io->cconn = cconn; - io->dconn = dconn; - io->dir = mode; - io->eof = io->err = 0; - cookie_io_functions_t cookies; - cookies.read = (cookie_read_function_t *)_ftp_readfn; - cookies.write = (cookie_write_function_t *)_ftp_writefn; - cookies.seek = (cookie_seek_function_t *)_ftp_seekfn; - cookies.close = (cookie_close_function_t *)_ftp_closefn; - f = fopencookie(io, "rw", cookies); - if (f == NULL) - free(io); - return (f); -} - -/* - * Transfer file - */ -static FILE * -_ftp_transfer(conn_t *conn, const char *oper, const char *file, - int mode, off_t offset, const char *flags) -{ - struct sockaddr_storage sa; - struct sockaddr_in6 *sin6; - struct sockaddr_in *sin4; - const char *bindaddr; - const char *filename; - int filenamelen, type; - int low, pasv, verbose; - int e, sd = -1; - socklen_t l; - char *s; - FILE *df; - - /* check flags */ - low = CHECK_FLAG('l'); - pasv = CHECK_FLAG('p'); - verbose = CHECK_FLAG('v'); - - /* passive mode */ - if (!pasv) - pasv = ((s = getenv("FTP_PASSIVE_MODE")) != NULL && - strncasecmp(s, "no", 2) != 0); - - /* isolate filename */ - filename = _ftp_filename(file, &filenamelen, &type); - - /* set transfer mode and data type */ - if ((e = _ftp_mode_type(conn, 0, type)) != FTP_OK) - goto ouch; - - /* find our own address, bind, and listen */ - l = sizeof(sa); - if (getsockname(conn->sd, (struct sockaddr *)&sa, &l) == -1) - goto sysouch; - if (sa.ss_family == AF_INET6) - unmappedaddr((struct sockaddr_in6 *)&sa); - - /* open data socket */ - if ((sd = socket(sa.ss_family, SOCK_STREAM, IPPROTO_TCP)) == -1) { - _fetch_syserr(); - return (NULL); - } - - if (pasv) { - u_char addr[64]; - char *ln, *p; - unsigned int i; - int port; - - /* send PASV command */ - if (verbose) - _fetch_info("setting passive mode"); - switch (sa.ss_family) { - case AF_INET: - if ((e = _ftp_cmd(conn, "PASV")) != FTP_PASSIVE_MODE) - goto ouch; - break; - case AF_INET6: - if ((e = _ftp_cmd(conn, "EPSV")) != FTP_EPASSIVE_MODE) { - if (e == -1) - goto ouch; - if ((e = _ftp_cmd(conn, "LPSV")) != - FTP_LPASSIVE_MODE) - goto ouch; - } - break; - default: - e = FTP_PROTOCOL_ERROR; /* XXX: error code should be prepared */ - goto ouch; - } - - /* - * Find address and port number. The reply to the PASV command - * is IMHO the one and only weak point in the FTP protocol. - */ - ln = conn->buf; - switch (e) { - case FTP_PASSIVE_MODE: - case FTP_LPASSIVE_MODE: - for (p = ln + 3; *p && !isdigit(*p); p++) - /* nothing */ ; - if (!*p) { - e = FTP_PROTOCOL_ERROR; - goto ouch; - } - l = (e == FTP_PASSIVE_MODE ? 6 : 21); - for (i = 0; *p && i < l; i++, p++) - addr[i] = strtol(p, &p, 10); - if (i < l) { - e = FTP_PROTOCOL_ERROR; - goto ouch; - } - break; - case FTP_EPASSIVE_MODE: - for (p = ln + 3; *p && *p != '('; p++) - /* nothing */ ; - if (!*p) { - e = FTP_PROTOCOL_ERROR; - goto ouch; - } - ++p; - if (sscanf(p, "%c%c%c%d%c", &addr[0], &addr[1], &addr[2], - &port, &addr[3]) != 5 || - addr[0] != addr[1] || - addr[0] != addr[2] || addr[0] != addr[3]) { - e = FTP_PROTOCOL_ERROR; - goto ouch; - } - break; - } - - /* seek to required offset */ - if (offset) - if (_ftp_cmd(conn, "REST %lu", (u_long)offset) != FTP_FILE_OK) - goto sysouch; - - /* construct sockaddr for data socket */ - l = sizeof(sa); - if (getpeername(conn->sd, (struct sockaddr *)&sa, &l) == -1) - goto sysouch; - if (sa.ss_family == AF_INET6) - unmappedaddr((struct sockaddr_in6 *)&sa); - switch (sa.ss_family) { - case AF_INET6: - sin6 = (struct sockaddr_in6 *)&sa; - if (e == FTP_EPASSIVE_MODE) - sin6->sin6_port = htons(port); - else { - bcopy(addr + 2, (char *)&sin6->sin6_addr, 16); - bcopy(addr + 19, (char *)&sin6->sin6_port, 2); - } - break; - case AF_INET: - sin4 = (struct sockaddr_in *)&sa; - if (e == FTP_EPASSIVE_MODE) - sin4->sin_port = htons(port); - else { - bcopy(addr, (char *)&sin4->sin_addr, 4); - bcopy(addr + 4, (char *)&sin4->sin_port, 2); - } - break; - default: - e = FTP_PROTOCOL_ERROR; /* XXX: error code should be prepared */ - break; - } - - /* connect to data port */ - if (verbose) - _fetch_info("opening data connection"); - bindaddr = getenv("FETCH_BIND_ADDRESS"); - if (bindaddr != NULL && *bindaddr != '\0' && - _fetch_bind(sd, sa.ss_family, bindaddr) != 0) - goto sysouch; - if (connect(sd, (struct sockaddr *)&sa, sizeof(struct sockaddr_storage)) == -1) - goto sysouch; - - /* make the server initiate the transfer */ - if (verbose) - _fetch_info("initiating transfer"); - e = _ftp_cmd(conn, "%s %.*s", oper, filenamelen, filename); - if (e != FTP_CONNECTION_ALREADY_OPEN && e != FTP_OPEN_DATA_CONNECTION) - goto ouch; - - } else { - u_int32_t a; - u_short p; - int d; -#ifdef IPV6_PORTRANGE - int arg; -#endif - char *ap; - char hname[INET6_ADDRSTRLEN]; - - switch (sa.ss_family) { - case AF_INET6: - ((struct sockaddr_in6 *)&sa)->sin6_port = 0; -#ifdef IPV6_PORTRANGE - arg = low ? IPV6_PORTRANGE_DEFAULT : IPV6_PORTRANGE_HIGH; - if (setsockopt(sd, IPPROTO_IPV6, IPV6_PORTRANGE, - (char *)&arg, sizeof(arg)) == -1) - goto sysouch; -#endif - break; - case AF_INET: - ((struct sockaddr_in *)&sa)->sin_port = 0; -#ifdef IP_PORTRANGE - arg = low ? IP_PORTRANGE_DEFAULT : IP_PORTRANGE_HIGH; - if (setsockopt(sd, IPPROTO_IP, IP_PORTRANGE, - (char *)&arg, sizeof(arg)) == -1) - goto sysouch; -#endif - break; - } - if (verbose) - _fetch_info("binding data socket"); - if (bind(sd, (struct sockaddr *)&sa, sizeof(struct sockaddr_storage)) == -1) - goto sysouch; - if (listen(sd, 1) == -1) - goto sysouch; - - /* find what port we're on and tell the server */ - if (getsockname(sd, (struct sockaddr *)&sa, &l) == -1) - goto sysouch; - switch (sa.ss_family) { - case AF_INET: - sin4 = (struct sockaddr_in *)&sa; - a = ntohl(sin4->sin_addr.s_addr); - p = ntohs(sin4->sin_port); - e = _ftp_cmd(conn, "PORT %d,%d,%d,%d,%d,%d", - (a >> 24) & 0xff, (a >> 16) & 0xff, - (a >> 8) & 0xff, a & 0xff, - (p >> 8) & 0xff, p & 0xff); - break; - case AF_INET6: -#define UC(b) (((int)b)&0xff) - e = -1; - sin6 = (struct sockaddr_in6 *)&sa; - sin6->sin6_scope_id = 0; - if (getnameinfo((struct sockaddr *)&sa,sizeof(struct sockaddr_storage), - hname, sizeof(hname), - NULL, 0, NI_NUMERICHOST) == 0) { - e = _ftp_cmd(conn, "EPRT |%d|%s|%d|", 2, hname, - htons(sin6->sin6_port)); - if (e == -1) - goto ouch; - } - if (e != FTP_OK) { - ap = (char *)&sin6->sin6_addr; - e = _ftp_cmd(conn, - "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d", - 6, 16, - UC(ap[0]), UC(ap[1]), UC(ap[2]), UC(ap[3]), - UC(ap[4]), UC(ap[5]), UC(ap[6]), UC(ap[7]), - UC(ap[8]), UC(ap[9]), UC(ap[10]), UC(ap[11]), - UC(ap[12]), UC(ap[13]), UC(ap[14]), UC(ap[15]), - 2, - (ntohs(sin6->sin6_port) >> 8) & 0xff, - ntohs(sin6->sin6_port) & 0xff); - } - break; - default: - e = FTP_PROTOCOL_ERROR; /* XXX: error code should be prepared */ - goto ouch; - } - if (e != FTP_OK) - goto ouch; - - /* seek to required offset */ - if (offset) - if (_ftp_cmd(conn, "REST %ju", (uintmax_t)offset) != FTP_FILE_OK) - goto sysouch; - - /* make the server initiate the transfer */ - if (verbose) - _fetch_info("initiating transfer"); - e = _ftp_cmd(conn, "%s %.*s", oper, filenamelen, filename); - if (e != FTP_CONNECTION_ALREADY_OPEN && e != FTP_OPEN_DATA_CONNECTION) - goto ouch; - - /* accept the incoming connection and go to town */ - if ((d = accept(sd, NULL, NULL)) == -1) - goto sysouch; - close(sd); - sd = d; - } - - if ((df = _ftp_setup(conn, _fetch_reopen(sd), mode)) == NULL) - goto sysouch; - return (df); - -sysouch: - _fetch_syserr(); - if (sd >= 0) - close(sd); - return (NULL); - -ouch: - if (e != -1) - _ftp_seterr(e); - if (sd >= 0) - close(sd); - return (NULL); -} - -/* - * Authenticate - */ -static int -_ftp_authenticate(conn_t *conn, struct url *url, struct url *purl) -{ - const char *user, *pwd, *logname; - char pbuf[MAXHOSTNAMELEN + MAXPATHLEN + 1]; - int e, len; - - /* XXX FTP_AUTH, and maybe .netrc */ - - /* send user name and password */ - if (url->user[0] == '\0') - _fetch_netrc_auth(url); - user = url->user; - if (*user == '\0') - user = getenv("FTP_LOGIN"); - if (user == NULL || *user == '\0') - user = FTP_ANONYMOUS_USER; - if (purl && url->port == _fetch_default_port(url->scheme)) - e = _ftp_cmd(conn, "USER %s@%s", user, url->host); - else if (purl) - e = _ftp_cmd(conn, "USER %s@%s@%d", user, url->host, url->port); - else - e = _ftp_cmd(conn, "USER %s", user); - - /* did the server request a password? */ - if (e == FTP_NEED_PASSWORD) { - pwd = url->pwd; - if (*pwd == '\0') - pwd = getenv("FTP_PASSWORD"); - if (pwd == NULL || *pwd == '\0') { - if ((logname = getlogin()) == 0) - logname = FTP_ANONYMOUS_USER; - if ((len = snprintf(pbuf, MAXPATHLEN + 1, "%s@", logname)) < 0) - len = 0; - else if (len > MAXPATHLEN) - len = MAXPATHLEN; - gethostname(pbuf + len, sizeof(pbuf) - len); - pwd = pbuf; - } - e = _ftp_cmd(conn, "PASS %s", pwd); - } - - return (e); -} - -/* - * Log on to FTP server - */ -static conn_t * -_ftp_connect(struct url *url, struct url *purl, const char *flags) -{ - conn_t *conn; - int e, direct, verbose; -#ifdef INET6 - int af = AF_UNSPEC; -#else - int af = AF_INET; -#endif - - direct = CHECK_FLAG('d'); - verbose = CHECK_FLAG('v'); - if (CHECK_FLAG('4')) - af = AF_INET; - else if (CHECK_FLAG('6')) - af = AF_INET6; - - if (direct) - purl = NULL; - - /* check for proxy */ - if (purl) { - /* XXX proxy authentication! */ - conn = _fetch_connect(purl->host, purl->port, af, verbose); - } else { - /* no proxy, go straight to target */ - conn = _fetch_connect(url->host, url->port, af, verbose); - purl = NULL; - } - - /* check connection */ - if (conn == NULL) - /* _fetch_connect() has already set an error code */ - return (NULL); - - /* expect welcome message */ - if ((e = _ftp_chkerr(conn)) != FTP_SERVICE_READY) - goto fouch; - - /* authenticate */ - if ((e = _ftp_authenticate(conn, url, purl)) != FTP_LOGGED_IN) - goto fouch; - - /* done */ - return (conn); - -fouch: - if (e != -1) - _ftp_seterr(e); - _fetch_close(conn); - return (NULL); -} - -/* - * Disconnect from server - */ -static void -_ftp_disconnect(conn_t *conn) -{ - (void)_ftp_cmd(conn, "QUIT"); - if (conn == cached_connection && conn->ref == 1) - cached_connection = NULL; - _fetch_close(conn); -} - -/* - * Check if we're already connected - */ -static int -_ftp_isconnected(struct url *url) -{ - return (cached_connection - && (strcmp(url->host, cached_host.host) == 0) - && (strcmp(url->user, cached_host.user) == 0) - && (strcmp(url->pwd, cached_host.pwd) == 0) - && (url->port == cached_host.port)); -} - -/* - * Check the cache, reconnect if no luck - */ -static conn_t * -_ftp_cached_connect(struct url *url, struct url *purl, const char *flags) -{ - conn_t *conn; - int e; - - /* set default port */ - if (!url->port) - url->port = _fetch_default_port(url->scheme); - - /* try to use previously cached connection */ - if (_ftp_isconnected(url)) { - e = _ftp_cmd(cached_connection, "NOOP"); - if (e == FTP_OK || e == FTP_SYNTAX_ERROR) - return (_fetch_ref(cached_connection)); - } - - /* connect to server */ - if ((conn = _ftp_connect(url, purl, flags)) == NULL) - return (NULL); - if (cached_connection) - _ftp_disconnect(cached_connection); - cached_connection = _fetch_ref(conn); - memcpy(&cached_host, url, sizeof(*url)); - return (conn); -} - -/* - * Check the proxy settings - */ -static struct url * -_ftp_get_proxy(const char *flags) -{ - struct url *purl; - char *p; - - if (flags != NULL && strchr(flags, 'd') != NULL) - return (NULL); - if (((p = getenv("FTP_PROXY")) || (p = getenv("ftp_proxy")) || - (p = getenv("HTTP_PROXY")) || (p = getenv("http_proxy"))) && - *p && (purl = fetchParseURL(p)) != NULL) { - if (!*purl->scheme) { - if (getenv("FTP_PROXY") || getenv("ftp_proxy")) - strcpy(purl->scheme, SCHEME_FTP); - else - strcpy(purl->scheme, SCHEME_HTTP); - } - if (!purl->port) - purl->port = _fetch_default_proxy_port(purl->scheme); - if (strcasecmp(purl->scheme, SCHEME_FTP) == 0 || - strcasecmp(purl->scheme, SCHEME_HTTP) == 0) - return (purl); - fetchFreeURL(purl); - } - return (NULL); -} - -/* - * Process an FTP request - */ -FILE * -_ftp_request(struct url *url, const char *op, struct url_stat *us, - struct url *purl, const char *flags) -{ - conn_t *conn; - int oflag; - - /* check if we should use HTTP instead */ - if (purl && strcasecmp(purl->scheme, SCHEME_HTTP) == 0) { - if (strcmp(op, "STAT") == 0) - return (_http_request(url, "HEAD", us, purl, flags)); - else if (strcmp(op, "RETR") == 0) - return (_http_request(url, "GET", us, purl, flags)); - /* - * Our HTTP code doesn't support PUT requests yet, so try - * a direct connection. - */ - } - - /* connect to server */ - conn = _ftp_cached_connect(url, purl, flags); - if (purl) - fetchFreeURL(purl); - if (conn == NULL) - return (NULL); - - /* change directory */ - if (_ftp_cwd(conn, url->doc) == -1) - return (NULL); - - /* stat file */ - if (us && _ftp_stat(conn, url->doc, us) == -1 - && fetchLastErrCode != FETCH_PROTO - && fetchLastErrCode != FETCH_UNAVAIL) - return (NULL); - - /* just a stat */ - if (strcmp(op, "STAT") == 0) - return (FILE *)1; /* bogus return value */ - if (strcmp(op, "STOR") == 0 || strcmp(op, "APPE") == 0) - oflag = O_WRONLY; - else - oflag = O_RDONLY; - - /* initiate the transfer */ - return (_ftp_transfer(conn, op, url->doc, oflag, url->offset, flags)); -} - -/* - * Get and stat file - */ -FILE * -fetchXGetFTP(struct url *url, struct url_stat *us, const char *flags) -{ - return (_ftp_request(url, "RETR", us, _ftp_get_proxy(flags), flags)); -} - -/* - * Get file - */ -FILE * -fetchGetFTP(struct url *url, const char *flags) -{ - return (fetchXGetFTP(url, NULL, flags)); -} - -/* - * Put file - */ -FILE * -fetchPutFTP(struct url *url, const char *flags) -{ - - return (_ftp_request(url, CHECK_FLAG('a') ? "APPE" : "STOR", NULL, - _ftp_get_proxy(flags), flags)); -} - -/* - * Get file stats - */ -int -fetchStatFTP(struct url *url, struct url_stat *us, const char *flags) -{ - FILE *f; - - f = _ftp_request(url, "STAT", us, _ftp_get_proxy(flags), flags); - if (f == NULL) - return (-1); - return (0); -} - -/* - * List a directory - */ -struct url_ent * -fetchListFTP(struct url *url, const char *flags) -{ - warnx("fetchListFTP(): not implemented"); - return (NULL); -} |