OpenBSD-4.6/usr.bin/ftp/fetch.c
/* $OpenBSD: fetch.c,v 1.91 2009/06/29 09:58:40 halex Exp $ */
/* $NetBSD: fetch.c,v 1.14 1997/08/18 10:20:20 lukem Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason Thorpe and Luke Mewburn.
*
* 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.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*
* FTP User Program -- Command line file retrieval
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <arpa/ftp.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <err.h>
#include <libgen.h>
#include <limits.h>
#include <netdb.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdarg.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
#include <resolv.h>
#ifndef SMALL
#include <openssl/ssl.h>
#include <openssl/err.h>
#else /* !SMALL */
#define SSL void
#endif /* !SMALL */
#include "ftp_var.h"
#include "cmds.h"
static int url_get(const char *, const char *, const char *);
void aborthttp(int);
void abortfile(int);
char hextochar(const char *);
char *urldecode(const char *);
int ftp_printf(FILE *, SSL *, const char *, ...) __attribute__((format(printf, 3, 4)));
char *ftp_readline(FILE *, SSL *, size_t *);
size_t ftp_read(FILE *, SSL *, char *, size_t);
#ifndef SMALL
int proxy_connect(int, char *, char *);
int SSL_vprintf(SSL *, const char *, va_list);
char *SSL_readline(SSL *, size_t *);
#endif /* !SMALL */
#define FTP_URL "ftp://" /* ftp URL prefix */
#define HTTP_URL "http://" /* http URL prefix */
#define HTTPS_URL "https://" /* https URL prefix */
#define FILE_URL "file:" /* file URL prefix */
#define FTP_PROXY "ftp_proxy" /* env var with ftp proxy location */
#define HTTP_PROXY "http_proxy" /* env var with http proxy location */
#define COOKIE_MAX_LEN 42
#define EMPTYSTRING(x) ((x) == NULL || (*(x) == '\0'))
static const char *at_encoding_warning =
"Extra `@' characters in usernames and passwords should be encoded as %%40";
jmp_buf httpabort;
static int redirect_loop;
/*
* Retrieve URL, via the proxy in $proxyvar if necessary.
* Modifies the string argument given.
* Returns -1 on failure, 0 on success
*/
static int
url_get(const char *origline, const char *proxyenv, const char *outfile)
{
char pbuf[NI_MAXSERV], hbuf[NI_MAXHOST], *cp, *portnum, *path, ststr[4];
char *hosttail, *cause = "unknown", *newline, *host, *port, *buf = NULL;
int error, i, isftpurl = 0, isfileurl = 0, isredirect = 0, rval = -1;
struct addrinfo hints, *res0, *res;
const char * volatile savefile;
char * volatile proxyurl = NULL;
char *cookie = NULL;
volatile int s = -1, out;
volatile sig_t oldintr;
FILE *fin = NULL;
off_t hashbytes;
const char *errstr;
size_t len, wlen;
#ifndef SMALL
char *sslpath = NULL, *sslhost = NULL;
int ishttpsurl = 0;
SSL_CTX *ssl_ctx = NULL;
#endif /* !SMALL */
SSL *ssl = NULL;
int status;
newline = strdup(origline);
if (newline == NULL)
errx(1, "Can't allocate memory to parse URL");
if (strncasecmp(newline, HTTP_URL, sizeof(HTTP_URL) - 1) == 0)
host = newline + sizeof(HTTP_URL) - 1;
else if (strncasecmp(newline, FTP_URL, sizeof(FTP_URL) - 1) == 0) {
host = newline + sizeof(FTP_URL) - 1;
isftpurl = 1;
} else if (strncasecmp(newline, FILE_URL, sizeof(FILE_URL) - 1) == 0) {
host = newline + sizeof(FILE_URL) - 1;
isfileurl = 1;
#ifndef SMALL
} else if (strncasecmp(newline, HTTPS_URL, sizeof(HTTPS_URL) - 1) == 0) {
host = newline + sizeof(HTTPS_URL) - 1;
ishttpsurl = 1;
#endif /* !SMALL */
} else
errx(1, "url_get: Invalid URL '%s'", newline);
if (isfileurl) {
path = host;
} else {
path = strchr(host, '/'); /* find path */
if (EMPTYSTRING(path)) {
if (isftpurl)
goto noftpautologin;
warnx("Invalid URL (no `/' after host): %s", origline);
goto cleanup_url_get;
}
*path++ = '\0';
if (EMPTYSTRING(path)) {
if (isftpurl)
goto noftpautologin;
warnx("Invalid URL (no file after host): %s", origline);
goto cleanup_url_get;
}
}
if (outfile)
savefile = outfile;
else
savefile = basename(path);
#ifndef SMALL
if (resume && (strcmp(savefile, "-") == 0)) {
warnx("can't append to stdout");
goto cleanup_url_get;
}
#endif /* !SMALL */
if (EMPTYSTRING(savefile)) {
if (isftpurl)
goto noftpautologin;
warnx("Invalid URL (no file after directory): %s", origline);
goto cleanup_url_get;
}
if (!isfileurl && proxyenv != NULL) { /* use proxy */
#ifndef SMALL
if (ishttpsurl) {
sslpath = strdup(path);
sslhost = strdup(host);
if (! sslpath || ! sslhost)
errx(1, "Can't allocate memory for https path/host.");
}
#endif /* !SMALL */
proxyurl = strdup(proxyenv);
if (proxyurl == NULL)
errx(1, "Can't allocate memory for proxy URL.");
if (strncasecmp(proxyurl, HTTP_URL, sizeof(HTTP_URL) - 1) == 0)
host = proxyurl + sizeof(HTTP_URL) - 1;
else if (strncasecmp(proxyurl, FTP_URL, sizeof(FTP_URL) - 1) == 0)
host = proxyurl + sizeof(FTP_URL) - 1;
else {
warnx("Malformed proxy URL: %s", proxyenv);
goto cleanup_url_get;
}
if (EMPTYSTRING(host)) {
warnx("Malformed proxy URL: %s", proxyenv);
goto cleanup_url_get;
}
*--path = '/'; /* add / back to real path */
path = strchr(host, '/'); /* remove trailing / on host */
if (!EMPTYSTRING(path))
*path++ = '\0'; /* i guess this ++ is useless */
path = strchr(host, '@'); /* look for credentials in proxy */
if (!EMPTYSTRING(path)) {
*path = '\0';
cookie = strchr(host, ':');
if (EMPTYSTRING(cookie)) {
warnx("Malformed proxy URL: %s", proxyenv);
goto cleanup_url_get;
}
cookie = malloc(COOKIE_MAX_LEN);
if (cookie == NULL)
errx(1, "out of memory");
if (b64_ntop(host, strlen(host), cookie, COOKIE_MAX_LEN) == -1)
errx(1, "error in base64 encoding");
*path = '@'; /* restore @ in proxyurl */
/*
* This removes the password from proxyurl,
* filling with stars
*/
for (host = 1 + strchr(proxyurl + 5, ':'); *host != '@';
host++)
*host = '*';
host = path + 1;
}
path = newline;
}
if (isfileurl) {
struct stat st;
s = open(path, O_RDONLY);
if (s == -1) {
warn("Can't open file %s", path);
goto cleanup_url_get;
}
if (fstat(s, &st) == -1)
filesize = -1;
else
filesize = st.st_size;
/* Open the output file. */
if (strcmp(savefile, "-") != 0) {
#ifndef SMALL
if (resume)
out = open(savefile, O_CREAT | O_WRONLY |
O_APPEND, 0666);
else
#endif /* !SMALL */
out = open(savefile, O_CREAT | O_WRONLY |
O_TRUNC, 0666);
if (out < 0) {
warn("Can't open %s", savefile);
goto cleanup_url_get;
}
} else
out = fileno(stdout);
#ifndef SMALL
if (resume) {
if (fstat(out, &st) == -1) {
warn("Can't fstat %s", savefile);
goto cleanup_url_get;
}
if (lseek(s, st.st_size, SEEK_SET) == -1) {
warn("Can't lseek %s", path);
goto cleanup_url_get;
}
restart_point = st.st_size;
}
#endif /* !SMALL */
/* Trap signals */
oldintr = NULL;
if (setjmp(httpabort)) {
if (oldintr)
(void)signal(SIGINT, oldintr);
goto cleanup_url_get;
}
oldintr = signal(SIGINT, abortfile);
bytes = 0;
hashbytes = mark;
progressmeter(-1, path);
if ((buf = malloc(4096)) == NULL)
errx(1, "Can't allocate memory for transfer buffer");
/* Finally, suck down the file. */
i = 0;
while ((len = read(s, buf, 4096)) > 0) {
bytes += len;
for (cp = buf; len > 0; len -= i, cp += i) {
if ((i = write(out, cp, len)) == -1) {
warn("Writing %s", savefile);
goto cleanup_url_get;
}
else if (i == 0)
break;
}
if (hash && !progress) {
while (bytes >= hashbytes) {
(void)putc('#', ttyout);
hashbytes += mark;
}
(void)fflush(ttyout);
}
}
if (hash && !progress && bytes > 0) {
if (bytes < mark)
(void)putc('#', ttyout);
(void)putc('\n', ttyout);
(void)fflush(ttyout);
}
if (len != 0) {
warn("Reading from file");
goto cleanup_url_get;
}
progressmeter(1, NULL);
if (verbose)
fputs("Successfully retrieved file.\n", ttyout);
(void)signal(SIGINT, oldintr);
rval = 0;
goto cleanup_url_get;
}
if (*host == '[' && (hosttail = strrchr(host, ']')) != NULL &&
(hosttail[1] == '\0' || hosttail[1] == ':')) {
host++;
*hosttail++ = '\0';
} else
hosttail = host;
portnum = strrchr(hosttail, ':'); /* find portnum */
if (portnum != NULL)
*portnum++ = '\0';
#ifndef SMALL
if (debug)
fprintf(ttyout, "host %s, port %s, path %s, save as %s.\n",
host, portnum, path, savefile);
#endif /* !SMALL */
memset(&hints, 0, sizeof(hints));
hints.ai_family = family;
hints.ai_socktype = SOCK_STREAM;
#ifndef SMALL
port = portnum ? portnum : (ishttpsurl ? httpsport : httpport);
#else /* !SMALL */
port = portnum ? portnum : httpport;
#endif /* !SMALL */
error = getaddrinfo(host, port, &hints, &res0);
/*
* If the services file is corrupt/missing, fall back
* on our hard-coded defines.
*/
if (error == EAI_SERVICE && port == httpport) {
snprintf(pbuf, sizeof(pbuf), "%d", HTTP_PORT);
error = getaddrinfo(host, pbuf, &hints, &res0);
#ifndef SMALL
} else if (error == EAI_SERVICE && port == httpsport) {
snprintf(pbuf, sizeof(pbuf), "%d", HTTPS_PORT);
error = getaddrinfo(host, pbuf, &hints, &res0);
#endif /* !SMALL */
}
if (error) {
warnx("%s: %s", gai_strerror(error), host);
goto cleanup_url_get;
}
s = -1;
for (res = res0; res; res = res->ai_next) {
if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf,
sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
strlcpy(hbuf, "(unknown)", sizeof(hbuf));
if (verbose)
fprintf(ttyout, "Trying %s...\n", hbuf);
s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (s == -1) {
cause = "socket";
continue;
}
again:
if (connect(s, res->ai_addr, res->ai_addrlen) < 0) {
int save_errno;
if (errno == EINTR)
goto again;
save_errno = errno;
close(s);
errno = save_errno;
s = -1;
cause = "connect";
continue;
}
/* get port in numeric */
if (getnameinfo(res->ai_addr, res->ai_addrlen, NULL, 0,
pbuf, sizeof(pbuf), NI_NUMERICSERV) == 0)
port = pbuf;
else
port = NULL;
#ifndef SMALL
if (proxyenv && sslhost)
proxy_connect(s, sslhost, cookie);
#endif /* !SMALL */
break;
}
freeaddrinfo(res0);
if (s < 0) {
warn("%s", cause);
goto cleanup_url_get;
}
#ifndef SMALL
if (ishttpsurl) {
if (proxyenv && sslpath) {
ishttpsurl = 0;
proxyurl = NULL;
path = sslpath;
}
SSL_library_init();
SSL_load_error_strings();
SSLeay_add_ssl_algorithms();
ssl_ctx = SSL_CTX_new(SSLv23_client_method());
ssl = SSL_new(ssl_ctx);
if (ssl == NULL || ssl_ctx == NULL) {
ERR_print_errors_fp(ttyout);
goto cleanup_url_get;
}
if (SSL_set_fd(ssl, s) == 0) {
ERR_print_errors_fp(ttyout);
goto cleanup_url_get;
}
if (SSL_connect(ssl) <= 0) {
ERR_print_errors_fp(ttyout);
goto cleanup_url_get;
}
} else {
fin = fdopen(s, "r+");
}
#else /* !SMALL */
fin = fdopen(s, "r+");
#endif /* !SMALL */
if (verbose)
fprintf(ttyout, "Requesting %s", origline);
/*
* Construct and send the request. Proxy requests don't want leading /.
*/
#ifndef SMALL
cookie_get(host, path, ishttpsurl, &buf);
#endif /* !SMALL */
if (proxyurl) {
if (verbose)
fprintf(ttyout, " (via %s)\n", proxyurl);
/*
* Host: directive must use the destination host address for
* the original URI (path). We do not attach it at this moment.
*/
if (cookie)
ftp_printf(fin, ssl, "GET %s HTTP/1.0\r\n"
"Proxy-Authorization: Basic %s%s\r\n%s\r\n\r\n",
path, cookie, buf ? buf : "", HTTP_USER_AGENT);
else
ftp_printf(fin, ssl, "GET %s HTTP/1.0\r\n%s%s\r\n\r\n",
path, buf ? buf : "", HTTP_USER_AGENT);
} else {
#ifndef SMALL
if (resume) {
struct stat stbuf;
if (stat(savefile, &stbuf) == 0)
restart_point = stbuf.st_size;
else
restart_point = 0;
}
#endif /* !SMALL */
ftp_printf(fin, ssl, "GET /%s %s\r\nHost: ", path,
#ifndef SMALL
restart_point ? "HTTP/1.1" :
#endif /* !SMALL */
"HTTP/1.0");
if (strchr(host, ':')) {
char *h, *p;
/*
* strip off scoped address portion, since it's
* local to node
*/
h = strdup(host);
if (h == NULL)
errx(1, "Can't allocate memory.");
if ((p = strchr(h, '%')) != NULL)
*p = '\0';
ftp_printf(fin, ssl, "[%s]", h);
free(h);
} else
ftp_printf(fin, ssl, "%s", host);
/*
* Send port number only if it's specified and does not equal
* 80. Some broken HTTP servers get confused if you explicitly
* send them the port number.
*/
#ifndef SMALL
if (port && strcmp(port, (ishttpsurl ? "443" : "80")) != 0)
ftp_printf(fin, ssl, ":%s", port);
if (restart_point)
ftp_printf(fin, ssl, "\r\nRange: bytes=%lld-",
(long long)restart_point);
#else /* !SMALL */
if (port && strcmp(port, "80") != 0)
ftp_printf(fin, ssl, ":%s", port);
#endif /* !SMALL */
ftp_printf(fin, ssl, "\r\n%s%s\r\n\r\n",
buf ? buf : "", HTTP_USER_AGENT);
if (verbose)
fprintf(ttyout, "\n");
}
#ifndef SMALL
free(buf);
#endif /* !SMALL */
buf = NULL;
if (fin != NULL && fflush(fin) == EOF) {
warn("Writing HTTP request");
goto cleanup_url_get;
}
if ((buf = ftp_readline(fin, ssl, &len)) == NULL) {
warn("Receiving HTTP reply");
goto cleanup_url_get;
}
while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n'))
buf[--len] = '\0';
#ifndef SMALL
if (debug)
fprintf(ttyout, "received '%s'\n", buf);
#endif /* !SMALL */
cp = strchr(buf, ' ');
if (cp == NULL)
goto improper;
else
cp++;
strlcpy(ststr, cp, sizeof(ststr));
status = strtonum(ststr, 200, 416, &errstr);
if (errstr) {
warnx("Error retrieving file: %s", cp);
goto cleanup_url_get;
}
switch (status) {
case 200: /* OK */
#ifndef SMALL
case 206: /* Partial Content */
#endif /* !SMALL */
break;
case 301: /* Moved Permanently */
case 302: /* Found */
case 303: /* See Other */
case 307: /* Temporary Redirect */
isredirect++;
if (redirect_loop++ > 10) {
warnx("Too many redirections requested");
goto cleanup_url_get;
}
break;
#ifndef SMALL
case 416: /* Requested Range Not Satisfiable */
warnx("File is already fully retrieved.");
goto cleanup_url_get;
#endif /* !SMALL */
default:
warnx("Error retrieving file: %s", cp);
goto cleanup_url_get;
}
/*
* Read the rest of the header.
*/
free(buf);
filesize = -1;
for (;;) {
if ((buf = ftp_readline(fin, ssl, &len)) == NULL) {
warn("Receiving HTTP reply");
goto cleanup_url_get;
}
while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n'))
buf[--len] = '\0';
if (len == 0)
break;
#ifndef SMALL
if (debug)
fprintf(ttyout, "received '%s'\n", buf);
#endif /* !SMALL */
/* Look for some headers */
cp = buf;
#define CONTENTLEN "Content-Length: "
if (strncasecmp(cp, CONTENTLEN, sizeof(CONTENTLEN) - 1) == 0) {
cp += sizeof(CONTENTLEN) - 1;
filesize = strtonum(cp, 0, LLONG_MAX, &errstr);
if (errstr != NULL)
goto improper;
#ifndef SMALL
if (restart_point)
filesize += restart_point;
#endif /* !SMALL */
#define LOCATION "Location: "
} else if (isredirect &&
strncasecmp(cp, LOCATION, sizeof(LOCATION) - 1) == 0) {
cp += sizeof(LOCATION) - 1;
if (verbose)
fprintf(ttyout, "Redirected to %s\n", cp);
if (fin != NULL)
fclose(fin);
else if (s != -1)
close(s);
free(proxyurl);
free(newline);
free(cookie);
rval = url_get(cp, proxyenv, outfile);
free(buf);
return (rval);
}
}
/* Open the output file. */
if (strcmp(savefile, "-") != 0) {
#ifndef SMALL
if (resume)
out = open(savefile, O_CREAT | O_WRONLY | O_APPEND,
0666);
else
#endif /* !SMALL */
out = open(savefile, O_CREAT | O_WRONLY | O_TRUNC,
0666);
if (out < 0) {
warn("Can't open %s", savefile);
goto cleanup_url_get;
}
} else
out = fileno(stdout);
/* Trap signals */
oldintr = NULL;
if (setjmp(httpabort)) {
if (oldintr)
(void)signal(SIGINT, oldintr);
goto cleanup_url_get;
}
oldintr = signal(SIGINT, aborthttp);
bytes = 0;
hashbytes = mark;
progressmeter(-1, path);
free(buf);
/* Finally, suck down the file. */
if ((buf = malloc(4096)) == NULL)
errx(1, "Can't allocate memory for transfer buffer");
i = 0;
len = 1;
while (len > 0) {
len = ftp_read(fin, ssl, buf, 4096);
bytes += len;
for (cp = buf, wlen = len; wlen > 0; wlen -= i, cp += i) {
if ((i = write(out, cp, wlen)) == -1) {
warn("Writing %s", savefile);
goto cleanup_url_get;
}
else if (i == 0)
break;
}
if (hash && !progress) {
while (bytes >= hashbytes) {
(void)putc('#', ttyout);
hashbytes += mark;
}
(void)fflush(ttyout);
}
}
if (hash && !progress && bytes > 0) {
if (bytes < mark)
(void)putc('#', ttyout);
(void)putc('\n', ttyout);
(void)fflush(ttyout);
}
if (len != 0) {
warn("Reading from socket");
goto cleanup_url_get;
}
progressmeter(1, NULL);
if (
#ifndef SMALL
!resume &&
#endif /* !SMALL */
filesize != -1 && len == 0 && bytes != filesize) {
if (verbose)
fputs("Read short file.\n", ttyout);
goto cleanup_url_get;
}
if (verbose)
fputs("Successfully retrieved file.\n", ttyout);
(void)signal(SIGINT, oldintr);
rval = 0;
goto cleanup_url_get;
noftpautologin:
warnx(
"Auto-login using ftp URLs isn't supported when using $ftp_proxy");
goto cleanup_url_get;
improper:
warnx("Improper response from %s", host);
cleanup_url_get:
#ifndef SMALL
if (ssl) {
SSL_shutdown(ssl);
SSL_free(ssl);
}
#endif /* !SMALL */
if (fin != NULL)
fclose(fin);
else if (s != -1)
close(s);
free(buf);
free(proxyurl);
free(newline);
free(cookie);
return (rval);
}
/*
* Abort a http retrieval
*/
/* ARGSUSED */
void
aborthttp(int signo)
{
alarmtimer(0);
fputs("\nhttp fetch aborted.\n", ttyout);
(void)fflush(ttyout);
longjmp(httpabort, 1);
}
/*
* Abort a http retrieval
*/
/* ARGSUSED */
void
abortfile(int signo)
{
alarmtimer(0);
fputs("\nfile fetch aborted.\n", ttyout);
(void)fflush(ttyout);
longjmp(httpabort, 1);
}
/*
* Retrieve multiple files from the command line, transferring
* files of the form "host:path", "ftp://host/path" using the
* ftp protocol, and files of the form "http://host/path" using
* the http protocol.
* If path has a trailing "/", then return (-1);
* the path will be cd-ed into and the connection remains open,
* and the function will return -1 (to indicate the connection
* is alive).
* If an error occurs the return value will be the offset+1 in
* argv[] of the file that caused a problem (i.e, argv[x]
* returns x+1)
* Otherwise, 0 is returned if all files retrieved successfully.
*/
int
auto_fetch(int argc, char *argv[], char *outfile)
{
char *xargv[5];
char *cp, *url, *host, *dir, *file, *portnum;
char *username, *pass, *pathstart;
char *ftpproxy, *httpproxy;
int rval, xargc;
volatile int argpos;
int dirhasglob, filehasglob, oautologin;
char rempath[MAXPATHLEN];
argpos = 0;
if (setjmp(toplevel)) {
if (connected)
disconnect(0, NULL);
return (argpos + 1);
}
(void)signal(SIGINT, (sig_t)intr);
(void)signal(SIGPIPE, (sig_t)lostpeer);
if ((ftpproxy = getenv(FTP_PROXY)) != NULL && *ftpproxy == '\0')
ftpproxy = NULL;
if ((httpproxy = getenv(HTTP_PROXY)) != NULL && *httpproxy == '\0')
httpproxy = NULL;
/*
* Loop through as long as there's files to fetch.
*/
for (rval = 0; (rval == 0) && (argpos < argc); free(url), argpos++) {
if (strchr(argv[argpos], ':') == NULL)
break;
host = dir = file = portnum = username = pass = NULL;
/*
* We muck with the string, so we make a copy.
*/
url = strdup(argv[argpos]);
if (url == NULL)
errx(1, "Can't allocate memory for auto-fetch.");
/*
* Try HTTP URL-style arguments first.
*/
if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 ||
#ifndef SMALL
/* even if we compiled without SSL, url_get will check */
strncasecmp(url, HTTPS_URL, sizeof(HTTPS_URL) -1) == 0 ||
#endif /* !SMALL */
strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) {
redirect_loop = 0;
if (url_get(url, httpproxy, outfile) == -1)
rval = argpos + 1;
continue;
}
/*
* Try FTP URL-style arguments next. If ftpproxy is
* set, use url_get() instead of standard ftp.
* Finally, try host:file.
*/
host = url;
if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) {
char *passend, *passagain, *userend;
if (ftpproxy) {
if (url_get(url, ftpproxy, outfile) == -1)
rval = argpos + 1;
continue;
}
host += sizeof(FTP_URL) - 1;
dir = strchr(host, '/');
/* Look for [user:pass@]host[:port] */
/* check if we have "user:pass@" */
userend = strchr(host, ':');
passend = strchr(host, '@');
if (passend && userend && userend < passend &&
(!dir || passend < dir)) {
username = host;
pass = userend + 1;
host = passend + 1;
*userend = *passend = '\0';
passagain = strchr(host, '@');
if (strchr(pass, '@') != NULL ||
(passagain != NULL && passagain < dir)) {
warnx(at_encoding_warning);
goto bad_ftp_url;
}
if (EMPTYSTRING(username)) {
bad_ftp_url:
warnx("Invalid URL: %s", argv[argpos]);
rval = argpos + 1;
continue;
}
username = urldecode(username);
pass = urldecode(pass);
}
#ifdef INET6
/* check [host]:port, or [host] */
if (host[0] == '[') {
cp = strchr(host, ']');
if (cp && (!dir || cp < dir)) {
if (cp + 1 == dir || cp[1] == ':') {
host++;
*cp++ = '\0';
} else
cp = NULL;
} else
cp = host;
} else
cp = host;
#else
cp = host;
#endif
/* split off host[:port] if there is */
if (cp) {
portnum = strchr(cp, ':');
pathstart = strchr(cp, '/');
/* : in path is not a port # indicator */
if (portnum && pathstart &&
pathstart < portnum)
portnum = NULL;
if (!portnum)
;
else {
if (!dir)
;
else if (portnum + 1 < dir) {
*portnum++ = '\0';
/*
* XXX should check if portnum
* is decimal number
*/
} else {
/* empty portnum */
goto bad_ftp_url;
}
}
} else
portnum = NULL;
} else { /* classic style `host:file' */
dir = strchr(host, ':');
}
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;
}
}
#ifndef SMALL
if (debug)
fprintf(ttyout,
"user %s:%s host %s port %s dir %s file %s\n",
username, pass ? "XXXX" : NULL, host, portnum,
dir, file);
#endif /* !SMALL */
/*
* Set up the connection.
*/
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 (username == NULL)
anonftp = 1;
else {
anonftp = 0;
autologin = 0;
}
setpeer(xargc, xargv);
autologin = oautologin;
if (connected == 0 ||
(connected == 1 && autologin && (username == NULL ||
!ftp_login(host, username, pass)))) {
warnx("Can't connect or login to host `%s'", host);
rval = argpos + 1;
continue;
}
/* Always use binary transfers. */
setbinary(0, NULL);
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)) {
#ifndef SMALL
rval = -1;
#else /* !SMALL */
recvrequest("NLST", "-", NULL, "w", 0, 0);
rval = 0;
#endif /* !SMALL */
continue;
}
if (verbose)
fprintf(ttyout, "Retrieving %s/%s\n", dir ? dir : "", file);
if (dirhasglob) {
snprintf(rempath, sizeof(rempath), "%s/%s", dir, file);
file = rempath;
}
/* Fetch the file(s). */
xargc = 2;
xargv[0] = "get";
xargv[1] = file;
xargv[2] = NULL;
if (dirhasglob || filehasglob) {
int ointeractive;
ointeractive = interactive;
interactive = 0;
xargv[0] = "mget";
#ifndef SMALL
if (resume) {
xargc = 3;
xargv[1] = "-c";
xargv[2] = file;
xargv[3] = NULL;
}
#endif /* !SMALL */
mget(xargc, xargv);
interactive = ointeractive;
} else {
if (outfile != NULL) {
xargv[2] = outfile;
xargv[3] = NULL;
xargc++;
}
#ifndef SMALL
if (resume)
reget(xargc, xargv);
else
#endif /* !SMALL */
get(xargc, xargv);
}
if ((code / 100) != COMPLETE)
rval = argpos + 1;
}
if (connected && rval != -1)
disconnect(0, NULL);
return (rval);
}
char *
urldecode(const char *str)
{
char *ret, c;
int i, reallen;
if (str == NULL)
return NULL;
if ((ret = malloc(strlen(str)+1)) == NULL)
err(1, "Can't allocate memory for URL decoding");
for (i = 0, reallen = 0; str[i] != '\0'; i++, reallen++, ret++) {
c = str[i];
if (c == '+') {
*ret = ' ';
continue;
}
/* Cannot use strtol here because next char
* after %xx may be a digit.
*/
if (c == '%' && isxdigit(str[i+1]) && isxdigit(str[i+2])) {
*ret = hextochar(&str[i+1]);
i+=2;
continue;
}
*ret = c;
}
*ret = '\0';
return ret-reallen;
}
char
hextochar(const char *str)
{
char c, ret;
c = str[0];
ret = c;
if (isalpha(c))
ret -= isupper(c) ? 'A' - 10 : 'a' - 10;
else
ret -= '0';
ret *= 16;
c = str[1];
ret += c;
if (isalpha(c))
ret -= isupper(c) ? 'A' - 10 : 'a' - 10;
else
ret -= '0';
return ret;
}
int
isurl(const char *p)
{
if (strncasecmp(p, FTP_URL, sizeof(FTP_URL) - 1) == 0 ||
strncasecmp(p, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 ||
#ifndef SMALL
strncasecmp(p, HTTPS_URL, sizeof(HTTPS_URL) - 1) == 0 ||
#endif /* !SMALL */
strncasecmp(p, FILE_URL, sizeof(FILE_URL) - 1) == 0 ||
strstr(p, ":/"))
return (1);
return (0);
}
char *
ftp_readline(FILE *fp, SSL *ssl, size_t *lenp)
{
if (fp != NULL)
return fparseln(fp, lenp, NULL, "\0\0\0", 0);
#ifndef SMALL
else if (ssl != NULL)
return SSL_readline(ssl, lenp);
#endif /* !SMALL */
else
return NULL;
}
size_t
ftp_read(FILE *fp, SSL *ssl, char *buf, size_t len)
{
size_t ret;
if (fp != NULL)
ret = fread(buf, sizeof(char), len, fp);
#ifndef SMALL
else if (ssl != NULL) {
int nr;
if (len > INT_MAX)
len = INT_MAX;
if ((nr = SSL_read(ssl, buf, (int)len)) <= 0)
ret = 0;
else
ret = nr;
}
#endif /* !SMALL */
else
ret = 0;
return (ret);
}
int
ftp_printf(FILE *fp, SSL *ssl, const char *fmt, ...)
{
int ret;
va_list ap;
va_start(ap, fmt);
if (fp != NULL)
ret = vfprintf(fp, fmt, ap);
#ifndef SMALL
else if (ssl != NULL)
ret = SSL_vprintf((SSL*)ssl, fmt, ap);
#endif /* !SMALL */
else
ret = NULL;
va_end(ap);
return (ret);
}
#ifndef SMALL
int
SSL_vprintf(SSL *ssl, const char *fmt, va_list ap)
{
int ret;
char *string;
if ((ret = vasprintf(&string, fmt, ap)) == -1)
return ret;
ret = SSL_write(ssl, string, ret);
free(string);
return ret;
}
char *
SSL_readline(SSL *ssl, size_t *lenp)
{
size_t i, len;
char *buf, *q, c;
len = 128;
if ((buf = malloc(len)) == NULL)
errx(1, "Can't allocate memory for transfer buffer");
for (i = 0; ; i++) {
if (i >= len - 1) {
if ((q = realloc(buf, 2 * len)) == NULL)
errx(1, "Can't expand transfer buffer");
buf = q;
len *= 2;
}
if (SSL_read(ssl, &c, 1) <= 0)
break;
buf[i] = c;
if (c == '\n')
break;
}
*lenp = i;
return (buf);
}
int
proxy_connect(int socket, char *host, char *cookie)
{
int l;
char buf[1024];
char *connstr, *hosttail, *port;
if (*host == '[' && (hosttail = strrchr(host, ']')) != NULL &&
(hosttail[1] == '\0' || hosttail[1] == ':')) {
host++;
*hosttail++ = '\0';
} else
hosttail = host;
port = strrchr(hosttail, ':'); /* find portnum */
if (port != NULL)
*port++ = '\0';
if (!port)
port = "443";
if (cookie) {
l = asprintf(&connstr, "CONNECT %s:%s HTTP/1.1\r\n"
"Proxy-Authorization: Basic %s\r\n%s\r\n\r\n",
host, port, cookie, HTTP_USER_AGENT);
} else {
l = asprintf(&connstr, "CONNECT %s:%s HTTP/1.1\r\n%s\r\n\r\n",
host, port, HTTP_USER_AGENT);
}
if (l == -1)
errx(1, "Could not allocate memory to assemble connect string!");
#ifndef SMALL
if (debug)
printf("%s", connstr);
#endif /* !SMALL */
if (write(socket, connstr, l) != l)
err(1, "Could not send connect string");
read(socket, &buf, sizeof(buf)); /* only proxy header XXX: error handling? */
free(connstr);
return(200);
}
#endif /* !SMALL */