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https://github.com/sheumann/hush.git
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379 lines
8.6 KiB
C
379 lines
8.6 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* ftpget
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*
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* Mini implementation of FTP to retrieve a remote file.
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*
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* Copyright (C) 2002 Jeff Angielski, The PTR Group <jeff@theptrgroup.com>
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* Copyright (C) 2002 Glenn McGrath <bug1@iinet.net.au>
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*
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* Based on wget.c by Chip Rosenthal Covad Communications
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* <chip@laserlink.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <string.h>
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#include <unistd.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include "busybox.h"
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typedef struct ftp_host_info_s {
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char *user;
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char *password;
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struct sockaddr_in *s_in;
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} ftp_host_info_t;
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static char verbose_flag = 0;
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static char do_continue = 0;
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static int ftpcmd(const char *s1, const char *s2, FILE *stream, char *buf)
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{
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if (verbose_flag) {
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bb_error_msg("cmd %s%s", s1, s2);
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}
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if (s1) {
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if (s2) {
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fprintf(stream, "%s%s\n", s1, s2);
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} else {
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fprintf(stream, "%s\n", s1);
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}
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}
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do {
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char *buf_ptr;
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if (fgets(buf, 510, stream) == NULL) {
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bb_perror_msg_and_die("fgets()");
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}
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buf_ptr = strstr(buf, "\r\n");
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if (buf_ptr) {
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*buf_ptr = '\0';
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}
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} while (! isdigit(buf[0]) || buf[3] != ' ');
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return atoi(buf);
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}
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static int xconnect_ftpdata(ftp_host_info_t *server, const char *buf)
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{
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char *buf_ptr;
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unsigned short port_num;
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buf_ptr = strrchr(buf, ',');
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*buf_ptr = '\0';
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port_num = atoi(buf_ptr + 1);
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buf_ptr = strrchr(buf, ',');
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*buf_ptr = '\0';
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port_num += atoi(buf_ptr + 1) * 256;
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server->s_in->sin_port=htons(port_num);
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return(xconnect(server->s_in));
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}
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static FILE *ftp_login(ftp_host_info_t *server)
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{
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FILE *control_stream;
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char buf[512];
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/* Connect to the command socket */
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control_stream = fdopen(xconnect(server->s_in), "r+");
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if (control_stream == NULL) {
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bb_perror_msg_and_die("Couldnt open control stream");
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}
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if (ftpcmd(NULL, NULL, control_stream, buf) != 220) {
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bb_error_msg_and_die("%s", buf + 4);
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}
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/* Login to the server */
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switch (ftpcmd("USER ", server->user, control_stream, buf)) {
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case 230:
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break;
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case 331:
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if (ftpcmd("PASS ", server->password, control_stream, buf) != 230) {
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bb_error_msg_and_die("PASS error: %s", buf + 4);
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}
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break;
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default:
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bb_error_msg_and_die("USER error: %s", buf + 4);
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}
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ftpcmd("TYPE I", NULL, control_stream, buf);
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return(control_stream);
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}
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#ifdef CONFIG_FTPGET
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static int ftp_recieve(ftp_host_info_t *server, FILE *control_stream,
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const char *local_path, char *server_path)
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{
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char buf[512];
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off_t filesize = 0;
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int fd_data;
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int fd_local = -1;
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off_t beg_range = 0;
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/* Connect to the data socket */
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if (ftpcmd("PASV", NULL, control_stream, buf) != 227) {
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bb_error_msg_and_die("PASV error: %s", buf + 4);
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}
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fd_data = xconnect_ftpdata(server, buf);
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if (ftpcmd("SIZE ", server_path, control_stream, buf) == 213) {
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unsigned long value=filesize;
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if (safe_strtoul(buf + 4, &value))
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bb_error_msg_and_die("SIZE error: %s", buf + 4);
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filesize = value;
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}
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if ((local_path[0] == '-') && (local_path[1] == '\0')) {
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fd_local = STDOUT_FILENO;
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do_continue = 0;
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}
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if (do_continue) {
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struct stat sbuf;
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if (lstat(local_path, &sbuf) < 0) {
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bb_perror_msg_and_die("fstat()");
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}
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if (sbuf.st_size > 0) {
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beg_range = sbuf.st_size;
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} else {
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do_continue = 0;
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}
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}
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if (do_continue) {
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sprintf(buf, "REST %ld", (long)beg_range);
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if (ftpcmd(buf, NULL, control_stream, buf) != 350) {
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do_continue = 0;
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} else {
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filesize -= beg_range;
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}
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}
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if (ftpcmd("RETR ", server_path, control_stream, buf) > 150) {
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bb_error_msg_and_die("RETR error: %s", buf + 4);
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}
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/* only make a local file if we know that one exists on the remote server */
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if (fd_local == -1) {
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if (do_continue) {
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fd_local = bb_xopen(local_path, O_APPEND | O_WRONLY);
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} else {
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fd_local = bb_xopen(local_path, O_CREAT | O_TRUNC | O_WRONLY);
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}
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}
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/* Copy the file */
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if (bb_copyfd_size(fd_data, fd_local, filesize) == -1) {
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exit(EXIT_FAILURE);
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}
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/* close it all down */
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close(fd_data);
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if (ftpcmd(NULL, NULL, control_stream, buf) != 226) {
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bb_error_msg_and_die("ftp error: %s", buf + 4);
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}
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ftpcmd("QUIT", NULL, control_stream, buf);
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return(EXIT_SUCCESS);
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}
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#endif
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#ifdef CONFIG_FTPPUT
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static int ftp_send(ftp_host_info_t *server, FILE *control_stream,
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const char *server_path, char *local_path)
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{
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struct stat sbuf;
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char buf[512];
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int fd_data;
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int fd_local;
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int response;
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/* Connect to the data socket */
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if (ftpcmd("PASV", NULL, control_stream, buf) != 227) {
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bb_error_msg_and_die("PASV error: %s", buf + 4);
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}
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fd_data = xconnect_ftpdata(server, buf);
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if (ftpcmd("CWD ", server_path, control_stream, buf) != 250) {
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bb_error_msg_and_die("CWD error: %s", buf + 4);
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}
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/* get the local file */
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if ((local_path[0] == '-') && (local_path[1] == '\0')) {
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fd_local = STDIN_FILENO;
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} else {
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fd_local = bb_xopen(local_path, O_RDONLY);
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fstat(fd_local, &sbuf);
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sprintf(buf, "ALLO %lu", (unsigned long)sbuf.st_size);
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response = ftpcmd(buf, NULL, control_stream, buf);
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switch (response) {
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case 200:
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case 202:
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break;
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default:
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close(fd_local);
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bb_error_msg_and_die("ALLO error: %s", buf + 4);
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break;
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}
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}
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response = ftpcmd("STOR ", local_path, control_stream, buf);
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switch (response) {
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case 125:
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case 150:
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break;
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default:
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close(fd_local);
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bb_error_msg_and_die("STOR error: %s", buf + 4);
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}
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/* transfer the file */
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if (bb_copyfd_eof(fd_local, fd_data) == -1) {
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exit(EXIT_FAILURE);
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}
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/* close it all down */
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close(fd_data);
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if (ftpcmd(NULL, NULL, control_stream, buf) != 226) {
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bb_error_msg_and_die("error: %s", buf + 4);
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}
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ftpcmd("QUIT", NULL, control_stream, buf);
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return(EXIT_SUCCESS);
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}
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#endif
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#define FTPGETPUT_OPT_CONTINUE 1
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#define FTPGETPUT_OPT_VERBOSE 2
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#define FTPGETPUT_OPT_USER 4
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#define FTPGETPUT_OPT_PASSWORD 8
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#define FTPGETPUT_OPT_PORT 16
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static const struct option ftpgetput_long_options[] = {
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{"continue", 1, NULL, 'c'},
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{"verbose", 0, NULL, 'v'},
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{"username", 1, NULL, 'u'},
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{"password", 1, NULL, 'p'},
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{"port", 1, NULL, 'P'},
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{0, 0, 0, 0}
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};
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int ftpgetput_main(int argc, char **argv)
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{
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/* content-length of the file */
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unsigned long opt;
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char *port = "ftp";
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/* socket to ftp server */
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FILE *control_stream;
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struct sockaddr_in s_in;
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/* continue a prev transfer (-c) */
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ftp_host_info_t *server;
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int (*ftp_action)(ftp_host_info_t *, FILE *, const char *, char *) = NULL;
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/* Check to see if the command is ftpget or ftput */
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#ifdef CONFIG_FTPPUT
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# ifdef CONFIG_FTPGET
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if (bb_applet_name[3] == 'p') {
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ftp_action = ftp_send;
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}
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# else
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ftp_action = ftp_send;
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# endif
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#endif
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#ifdef CONFIG_FTPGET
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# ifdef CONFIG_FTPPUT
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if (bb_applet_name[3] == 'g') {
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ftp_action = ftp_recieve;
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}
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# else
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ftp_action = ftp_recieve;
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# endif
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#endif
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/* Set default values */
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server = xmalloc(sizeof(ftp_host_info_t));
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server->user = "anonymous";
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server->password = "busybox@";
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verbose_flag = 0;
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/*
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* Decipher the command line
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*/
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bb_applet_long_options = ftpgetput_long_options;
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opt = bb_getopt_ulflags(argc, argv, "cvu:p:P:", &server->user, &server->password, &port);
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/* Process the non-option command line arguments */
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if (argc - optind != 3) {
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bb_show_usage();
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}
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if (opt & FTPGETPUT_OPT_CONTINUE) {
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do_continue = 1;
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}
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if (opt & FTPGETPUT_OPT_VERBOSE) {
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verbose_flag = 1;
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}
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/* We want to do exactly _one_ DNS lookup, since some
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* sites (i.e. ftp.us.debian.org) use round-robin DNS
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* and we want to connect to only one IP... */
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server->s_in = &s_in;
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bb_lookup_host(&s_in, argv[optind]);
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s_in.sin_port = bb_lookup_port(port, "tcp", 21);
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if (verbose_flag) {
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printf("Connecting to %s[%s]:%d\n",
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argv[optind], inet_ntoa(s_in.sin_addr), ntohs(s_in.sin_port));
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}
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/* Connect/Setup/Configure the FTP session */
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control_stream = ftp_login(server);
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return(ftp_action(server, control_stream, argv[optind + 1], argv[optind + 2]));
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}
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/*
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Local Variables:
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c-file-style: "linux"
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c-basic-offset: 4
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tab-width: 4
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End:
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*/
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