Send patches - preferably formatted by git format-patch - to patches at archlinux32 dot org.
summaryrefslogtreecommitdiff
path: root/lib/libfetch/ftp.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/libfetch/ftp.c')
-rw-r--r--lib/libfetch/ftp.c1179
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);
-}