bc67101b31
returns IPv4 mapped IPv6 address. FTP is nervous about address family. Submitted by itojun and slightly modified to fit our ftp(1).
715 lines
16 KiB
C
715 lines
16 KiB
C
/* $NetBSD: fetch.c,v 1.16.2.1 1997/11/18 01:00:22 mellon Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason Thorpe and Luke Mewburn.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$FreeBSD$");
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__RCSID_SOURCE("$NetBSD: fetch.c,v 1.16.2.1 1997/11/18 01:00:22 mellon Exp $");
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#endif /* not lint */
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/*
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* FTP User Program -- Command line file retrieval
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/ftp.h>
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#include <arpa/inet.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <netdb.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "ftp_var.h"
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/* wrapper for KAME-special getnameinfo() */
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#ifndef NI_WITHSCOPEID
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#define NI_WITHSCOPEID 0
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#endif
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static int url_get __P((const char *, const char *));
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void aborthttp __P((int));
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#define FTP_URL "ftp://" /* ftp URL prefix */
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#define HTTP_URL "http://" /* http URL prefix */
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#define FTP_PROXY "ftp_proxy" /* env var with ftp proxy location */
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#define HTTP_PROXY "http_proxy" /* env var with http proxy location */
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#define EMPTYSTRING(x) ((x) == NULL || (*(x) == '\0'))
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jmp_buf httpabort;
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/*
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* Retrieve URL, via the proxy in $proxyvar if necessary.
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* Modifies the string argument given.
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* Returns -1 on failure, 0 on success
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*/
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static int
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url_get(origline, proxyenv)
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const char *origline;
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const char *proxyenv;
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{
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struct addrinfo hints;
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struct addrinfo *res0, *res;
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char nameinfo[2 * INET6_ADDRSTRLEN + 1];
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int i, out, isftpurl;
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char *port;
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volatile int s;
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size_t len;
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char c, *cp, *ep, *portnum, *path, buf[4096];
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const char *savefile;
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char *line, *proxy, *host;
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volatile sig_t oldintr;
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off_t hashbytes;
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int error;
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s = -1;
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proxy = NULL;
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isftpurl = 0;
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#ifdef __GNUC__ /* XXX: to shut up gcc warnings */
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(void)&savefile;
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(void)&proxy;
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#endif
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line = strdup(origline);
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if (line == NULL)
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errx(1, "Can't allocate memory to parse URL");
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if (strncasecmp(line, HTTP_URL, sizeof(HTTP_URL) - 1) == 0)
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host = line + sizeof(HTTP_URL) - 1;
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else if (strncasecmp(line, FTP_URL, sizeof(FTP_URL) - 1) == 0) {
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host = line + sizeof(FTP_URL) - 1;
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isftpurl = 1;
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} else
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errx(1, "url_get: Invalid URL '%s'", line);
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path = strchr(host, '/'); /* find path */
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if (EMPTYSTRING(path)) {
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if (isftpurl)
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goto noftpautologin;
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warnx("Invalid URL (no `/' after host): %s", origline);
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goto cleanup_url_get;
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}
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*path++ = '\0';
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if (EMPTYSTRING(path)) {
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if (isftpurl)
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goto noftpautologin;
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warnx("Invalid URL (no file after host): %s", origline);
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goto cleanup_url_get;
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}
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savefile = strrchr(path, '/'); /* find savefile */
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if (savefile != NULL)
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savefile++;
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else
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savefile = path;
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if (EMPTYSTRING(savefile)) {
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if (isftpurl)
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goto noftpautologin;
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warnx("Invalid URL (no file after directory): %s", origline);
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goto cleanup_url_get;
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}
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if (proxyenv != NULL) { /* use proxy */
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proxy = strdup(proxyenv);
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if (proxy == NULL)
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errx(1, "Can't allocate memory for proxy URL.");
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if (strncasecmp(proxy, HTTP_URL, sizeof(HTTP_URL) - 1) == 0)
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host = proxy + sizeof(HTTP_URL) - 1;
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else if (strncasecmp(proxy, FTP_URL, sizeof(FTP_URL) - 1) == 0)
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host = proxy + sizeof(FTP_URL) - 1;
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else {
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warnx("Malformed proxy URL: %s", proxyenv);
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goto cleanup_url_get;
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}
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if (EMPTYSTRING(host)) {
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warnx("Malformed proxy URL: %s", proxyenv);
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goto cleanup_url_get;
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}
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*--path = '/'; /* add / back to real path */
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path = strchr(host, '/'); /* remove trailing / on host */
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if (! EMPTYSTRING(path))
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*path++ = '\0';
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path = line;
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}
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if (*host == '[' && (portnum = strrchr(host, ']'))) { /* IPv6 URL */
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*portnum++ = '\0';
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host++;
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if (*portnum == ':')
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portnum++;
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else
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portnum = NULL;
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} else {
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portnum = strrchr(host, ':'); /* find portnum */
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if (portnum != NULL)
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*portnum++ = '\0';
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}
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if (debug)
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printf("host %s, port %s, path %s, save as %s.\n",
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host, portnum, path, savefile);
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if (! EMPTYSTRING(portnum)) {
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port = portnum;
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} else
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port = httpport;
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = family;
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hints.ai_socktype = SOCK_STREAM;
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error = getaddrinfo(host, port, &hints, &res);
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res0 = res;
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if (error) {
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warnx("%s: %s", host, gai_strerror(error));
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if (error == EAI_SYSTEM)
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warnx("%s: %s", host, strerror(errno));
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goto cleanup_url_get;
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}
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while (1)
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{
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ai_unmapped(res);
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s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
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if (s == -1) {
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res = res->ai_next;
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if (res)
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continue;
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warn("Can't create socket");
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goto cleanup_url_get;
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}
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if (dobind) {
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struct addrinfo *bindres;
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int binderr = -1;
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for (bindres = bindres0;
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bindres != NULL;
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bindres = bindres->ai_next)
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if (bindres->ai_family == res->ai_family)
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break;
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if (bindres == NULL)
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bindres = bindres0;
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binderr = bind(s, bindres->ai_addr, bindres->ai_addrlen);
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if (binderr == -1)
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{
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res = res->ai_next;
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if (res) {
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(void)close(s);
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continue;
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}
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getnameinfo(bindres->ai_addr, bindres->ai_addrlen,
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nameinfo, sizeof(nameinfo), NULL, 0,
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NI_NUMERICHOST|NI_WITHSCOPEID);
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/* XXX check error? */
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warn("Can't bind to %s", nameinfo);
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goto cleanup_url_get;
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}
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}
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if (connect(s, res->ai_addr, res->ai_addrlen) < 0) {
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res = res->ai_next;
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if (res) {
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(void)close(s);
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continue;
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}
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warn("Can't connect to %s", host);
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goto cleanup_url_get;
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}
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break;
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}
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freeaddrinfo(res0);
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/*
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* Construct and send the request. We're expecting a return
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* status of "200". Proxy requests don't want leading /.
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*/
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if (!proxy)
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printf("Requesting %s\n", origline);
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else
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printf("Requesting %s (via %s)\n", origline, proxyenv);
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len = snprintf(buf, sizeof(buf), "GET %s%s HTTP/1.0\r\n\r\n",
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proxy ? "" : "/", path);
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if (write(s, buf, len) < len) {
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warn("Writing HTTP request");
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goto cleanup_url_get;
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}
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memset(buf, 0, sizeof(buf));
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for (cp = buf; cp < buf + sizeof(buf); ) {
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if (read(s, cp, 1) != 1)
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goto improper;
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if (*cp == '\r')
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continue;
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if (*cp == '\n')
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break;
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cp++;
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}
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buf[sizeof(buf) - 1] = '\0'; /* sanity */
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cp = strchr(buf, ' ');
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if (cp == NULL)
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goto improper;
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else
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cp++;
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if (strncmp(cp, "200", 3)) {
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warnx("Error retrieving file: %s", cp);
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goto cleanup_url_get;
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}
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/*
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* Read the rest of the header.
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*/
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memset(buf, 0, sizeof(buf));
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c = '\0';
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for (cp = buf; cp < buf + sizeof(buf); ) {
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if (read(s, cp, 1) != 1)
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goto improper;
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if (*cp == '\r')
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continue;
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if (*cp == '\n' && c == '\n')
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break;
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c = *cp;
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cp++;
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}
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buf[sizeof(buf) - 1] = '\0'; /* sanity */
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/*
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* Look for the "Content-length: " header.
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*/
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#define CONTENTLEN "Content-Length: "
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for (cp = buf; *cp != '\0'; cp++) {
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if (tolower((unsigned char)*cp) == 'c' &&
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strncasecmp(cp, CONTENTLEN, sizeof(CONTENTLEN) - 1) == 0)
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break;
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}
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if (*cp != '\0') {
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cp += sizeof(CONTENTLEN) - 1;
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ep = strchr(cp, '\n');
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if (ep == NULL)
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goto improper;
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else
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*ep = '\0';
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filesize = strtol(cp, &ep, 10);
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if (filesize < 1 || *ep != '\0')
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goto improper;
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} else
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filesize = -1;
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/* Open the output file. */
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out = open(savefile, O_CREAT | O_WRONLY | O_TRUNC, 0666);
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if (out < 0) {
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warn("Can't open %s", savefile);
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goto cleanup_url_get;
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}
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/* Trap signals */
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oldintr = NULL;
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if (setjmp(httpabort)) {
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if (oldintr)
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(void)signal(SIGINT, oldintr);
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goto cleanup_url_get;
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}
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oldintr = signal(SIGINT, aborthttp);
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bytes = 0;
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hashbytes = mark;
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progressmeter(-1);
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/* Finally, suck down the file. */
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i = 0;
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while ((len = read(s, buf, sizeof(buf))) > 0) {
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bytes += len;
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for (cp = buf; len > 0; len -= i, cp += i) {
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if ((i = write(out, cp, len)) == -1) {
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warn("Writing %s", savefile);
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goto cleanup_url_get;
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}
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else if (i == 0)
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break;
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}
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if (hash && !progress) {
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while (bytes >= hashbytes) {
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(void)putchar('#');
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hashbytes += mark;
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}
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(void)fflush(stdout);
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}
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}
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if (hash && !progress && bytes > 0) {
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if (bytes < mark)
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(void)putchar('#');
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(void)putchar('\n');
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(void)fflush(stdout);
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}
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if (len != 0) {
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warn("Reading from socket");
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goto cleanup_url_get;
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}
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progressmeter(1);
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if (verbose)
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puts("Successfully retrieved file.");
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(void)signal(SIGINT, oldintr);
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close(s);
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close(out);
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if (proxy)
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free(proxy);
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free(line);
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return (0);
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noftpautologin:
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warnx(
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"Auto-login using ftp URLs isn't supported when using $ftp_proxy");
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goto cleanup_url_get;
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improper:
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warnx("Improper response from %s", host);
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cleanup_url_get:
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if (s != -1)
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close(s);
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if (proxy)
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free(proxy);
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free(line);
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if (res0 != NULL)
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freeaddrinfo(res0);
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return (-1);
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}
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/*
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* Abort a http retrieval
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*/
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void
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aborthttp(notused)
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int notused;
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{
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alarmtimer(0);
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puts("\nhttp fetch aborted.");
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(void)fflush(stdout);
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longjmp(httpabort, 1);
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}
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/*
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* Retrieve multiple files from the command line, transferring
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* files of the form "host:path", "ftp://host/path" using the
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* ftp protocol, and files of the form "http://host/path" using
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* the http protocol.
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* If path has a trailing "/", then return (-1);
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* the path will be cd-ed into and the connection remains open,
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* and the function will return -1 (to indicate the connection
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* is alive).
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* If an error occurs the return value will be the offset+1 in
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* argv[] of the file that caused a problem (i.e, argv[x]
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* returns x+1)
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* Otherwise, 0 is returned if all files retrieved successfully.
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*/
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int
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auto_fetch(argc, argv)
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int argc;
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char *argv[];
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{
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static char lasthost[MAXHOSTNAMELEN];
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char *xargv[5];
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char *cp, *line, *host, *dir, *file, *portnum;
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char *user, *pass;
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char *ftpproxy, *httpproxy;
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int rval, xargc;
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volatile int argpos;
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int dirhasglob, filehasglob;
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char rempath[MAXPATHLEN];
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argpos = 0;
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if (setjmp(toplevel)) {
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if (connected)
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disconnect(0, NULL);
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return (argpos + 1);
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}
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(void)signal(SIGINT, (sig_t)intr);
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(void)signal(SIGPIPE, (sig_t)lostpeer);
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ftpproxy = getenv(FTP_PROXY);
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httpproxy = getenv(HTTP_PROXY);
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/*
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* Loop through as long as there's files to fetch.
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*/
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for (rval = 0; (rval == 0) && (argpos < argc); free(line), argpos++) {
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if (strchr(argv[argpos], ':') == NULL)
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break;
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host = dir = file = portnum = user = pass = NULL;
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/*
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* We muck with the string, so we make a copy.
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*/
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line = strdup(argv[argpos]);
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if (line == NULL)
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errx(1, "Can't allocate memory for auto-fetch.");
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/*
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* Try HTTP URL-style arguments first.
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*/
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if (strncasecmp(line, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) {
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if (url_get(line, httpproxy) == -1)
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rval = argpos + 1;
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continue;
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}
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/*
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* Try FTP URL-style arguments next. If ftpproxy is
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* set, use url_get() instead of standard ftp.
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* Finally, try host:file.
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*/
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host = line;
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if (strncasecmp(line, FTP_URL, sizeof(FTP_URL) - 1) == 0) {
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if (ftpproxy) {
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if (url_get(line, ftpproxy) == -1)
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rval = argpos + 1;
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continue;
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}
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host += sizeof(FTP_URL) - 1;
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dir = strchr(host, '/');
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/* look for [user:pass@]host[:port] */
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pass = strpbrk(host, ":@/");
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if (pass == NULL || *pass == '/') {
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pass = NULL;
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goto parsed_url;
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}
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if (pass == host || *pass == '@') {
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bad_ftp_url:
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|
warnx("Invalid URL: %s", argv[argpos]);
|
|
rval = argpos + 1;
|
|
continue;
|
|
}
|
|
*pass++ = '\0';
|
|
cp = strpbrk(pass, ":@/");
|
|
if (cp == NULL || *cp == '/') {
|
|
portnum = pass;
|
|
pass = NULL;
|
|
goto parsed_url;
|
|
}
|
|
if (EMPTYSTRING(cp) || *cp == ':')
|
|
goto bad_ftp_url;
|
|
*cp++ = '\0';
|
|
user = host;
|
|
if (EMPTYSTRING(user))
|
|
goto bad_ftp_url;
|
|
host = cp;
|
|
portnum = strchr(host, ':');
|
|
if (portnum != NULL)
|
|
*portnum++ = '\0';
|
|
} else { /* classic style `host:file' */
|
|
char *end_brace;
|
|
|
|
if (*host == '[' &&
|
|
(end_brace = strrchr(host, ']')) != NULL) {
|
|
/*IPv6 addr in []*/
|
|
host++;
|
|
*end_brace = '\0';
|
|
dir = strchr(end_brace + 1, ':');
|
|
} else
|
|
dir = strchr(host, ':');
|
|
}
|
|
parsed_url:
|
|
if (EMPTYSTRING(host)) {
|
|
rval = argpos + 1;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* If dir is NULL, the file wasn't specified
|
|
* (URL looked something like ftp://host)
|
|
*/
|
|
if (dir != NULL)
|
|
*dir++ = '\0';
|
|
|
|
/*
|
|
* Extract the file and (if present) directory name.
|
|
*/
|
|
if (! EMPTYSTRING(dir)) {
|
|
cp = strrchr(dir, '/');
|
|
if (cp != NULL) {
|
|
*cp++ = '\0';
|
|
file = cp;
|
|
} else {
|
|
file = dir;
|
|
dir = NULL;
|
|
}
|
|
}
|
|
if (debug)
|
|
printf("user %s:%s host %s port %s dir %s file %s\n",
|
|
user, pass, host, portnum, dir, file);
|
|
|
|
/*
|
|
* Set up the connection if we don't have one.
|
|
*/
|
|
if (strcmp(host, lasthost) != 0) {
|
|
int oautologin;
|
|
|
|
(void)strcpy(lasthost, host);
|
|
if (connected)
|
|
disconnect(0, NULL);
|
|
xargv[0] = __progname;
|
|
xargv[1] = host;
|
|
xargv[2] = NULL;
|
|
xargc = 2;
|
|
if (! EMPTYSTRING(portnum)) {
|
|
xargv[2] = portnum;
|
|
xargv[3] = NULL;
|
|
xargc = 3;
|
|
}
|
|
oautologin = autologin;
|
|
if (user != NULL)
|
|
autologin = 0;
|
|
setpeer(xargc, xargv);
|
|
autologin = oautologin;
|
|
if ((connected == 0)
|
|
|| ((connected == 1) && !login(host, user, pass)) ) {
|
|
warnx("Can't connect or login to host `%s'",
|
|
host);
|
|
rval = argpos + 1;
|
|
continue;
|
|
}
|
|
|
|
/* Always use binary transfers. */
|
|
setbinary(0, NULL);
|
|
}
|
|
/* cd back to '/' */
|
|
xargv[0] = "cd";
|
|
xargv[1] = "/";
|
|
xargv[2] = NULL;
|
|
cd(2, xargv);
|
|
if (! dirchange) {
|
|
rval = argpos + 1;
|
|
continue;
|
|
}
|
|
|
|
dirhasglob = filehasglob = 0;
|
|
if (doglob) {
|
|
if (! EMPTYSTRING(dir) &&
|
|
strpbrk(dir, "*?[]{}") != NULL)
|
|
dirhasglob = 1;
|
|
if (! EMPTYSTRING(file) &&
|
|
strpbrk(file, "*?[]{}") != NULL)
|
|
filehasglob = 1;
|
|
}
|
|
|
|
/* Change directories, if necessary. */
|
|
if (! EMPTYSTRING(dir) && !dirhasglob) {
|
|
xargv[0] = "cd";
|
|
xargv[1] = dir;
|
|
xargv[2] = NULL;
|
|
cd(2, xargv);
|
|
if (! dirchange) {
|
|
rval = argpos + 1;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (EMPTYSTRING(file)) {
|
|
rval = -1;
|
|
continue;
|
|
}
|
|
|
|
if (!verbose)
|
|
printf("Retrieving %s/%s\n", dir ? dir : "", file);
|
|
|
|
if (dirhasglob) {
|
|
snprintf(rempath, sizeof(rempath), "%s/%s", dir, file);
|
|
file = rempath;
|
|
}
|
|
|
|
/* Fetch the file(s). */
|
|
xargv[0] = "get";
|
|
xargv[1] = file;
|
|
xargv[2] = NULL;
|
|
if (dirhasglob || filehasglob) {
|
|
int ointeractive;
|
|
|
|
ointeractive = interactive;
|
|
interactive = 0;
|
|
xargv[0] = "mget";
|
|
mget(2, xargv);
|
|
interactive = ointeractive;
|
|
} else
|
|
get(2, xargv);
|
|
|
|
if ((code / 100) != COMPLETE)
|
|
rval = argpos + 1;
|
|
}
|
|
if (connected && rval != -1)
|
|
disconnect(0, NULL);
|
|
return (rval);
|
|
}
|
|
|
|
int
|
|
isurl(p)
|
|
const char *p;
|
|
{
|
|
char *path, pton_buf[16];
|
|
|
|
if (strncasecmp(p, FTP_URL, sizeof(FTP_URL) - 1) == 0
|
|
|| strncasecmp(p, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) {
|
|
return 1;
|
|
}
|
|
if (*p == '[' && (path = strrchr(p, ']')) != NULL) /*IPv6 addr in []*/
|
|
return (*(++path) == ':') ? 1 : 0;
|
|
#ifdef INET6
|
|
if (inet_pton(AF_INET6, p, pton_buf) == 1) /* raw IPv6 addr */
|
|
return 0;
|
|
#endif
|
|
if (strchr(p, ':') != NULL) /* else, if ':' exist */
|
|
return 1;
|
|
return 0;
|
|
}
|