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732 lines
13 KiB
C
732 lines
13 KiB
C
/*
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+----------------------------------------------------------------------+
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| PHP HTML Embedded Scripting Language Version 3.0 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-1999 PHP Development Team (See Credits file) |
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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 one of the following licenses: |
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| |
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| A) the GNU General Public License as published by the Free Software |
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| Foundation; either version 2 of the License, or (at your option) |
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| any later version. |
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| |
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| B) the PHP License as published by the PHP Development Team and |
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| included in the distribution in the file: LICENSE |
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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 |
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| GNU General Public License for more details. |
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| |
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| You should have received a copy of both licenses referred to here. |
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| If you did not, or have any questions about PHP licensing, please |
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| contact core@php.net. |
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+----------------------------------------------------------------------+
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| Authors: |
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| Andrew Skalski <askalski@chek.com> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#include "php.h"
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#if HAVE_FTP
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include "ftp.h"
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/* reads an ftp response, returns true on success, false on error */
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static int ftp_getresp(ftpbuf_t *ftp);
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/* sets the ftp transfer type */
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static int ftp_type(ftpbuf_t *ftp, ftptype_t type);
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/* opens up a port for ftp transfer */
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static databuf_t* ftp_port(ftpbuf_t *ftp);
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/* accepts the data connection, returns updated data buffer */
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static databuf_t* data_accept(databuf_t *data);
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/* closes the data connection, returns NULL */
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static databuf_t* data_close(databuf_t *data);
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/* generic file lister */
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static char** ftp_genlist(ftpbuf_t *ftp,
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const char *cmd, const char *path);
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ftpbuf_t*
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ftp_open(const char *host, short port)
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{
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int fd = -1;
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ftpbuf_t *ftp;
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struct sockaddr_in addr;
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struct hostent *he;
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int size;
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/* set up the address */
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if ((he = gethostbyname(host)) == NULL) {
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herror("gethostbyname");
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return NULL;
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}
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memset(&addr, 0, sizeof(addr));
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memcpy(&addr.sin_addr, he->h_addr, he->h_length);
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addr.sin_family = AF_INET;
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addr.sin_port = port ? port : htons(21);
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/* alloc the ftp structure */
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ftp = calloc(1, sizeof(*ftp));
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if (ftp == NULL) {
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perror("calloc");
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return NULL;
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}
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/* connect */
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if ((fd = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
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perror("socket");
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goto bail;
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}
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if (connect(fd, (struct sockaddr*) &addr, sizeof(addr)) == -1) {
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perror("connect");
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goto bail;
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}
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size = sizeof(addr);
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if (getsockname(fd, (struct sockaddr*) &addr, &size) == -1) {
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perror("getsockname");
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goto bail;
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}
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ftp->localaddr = addr.sin_addr;
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if ((ftp->fp = fdopen(fd, "r+")) == NULL) {
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perror("fdopen");
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goto bail;
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}
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if (!ftp_getresp(ftp) || ftp->resp != 220) {
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goto bail;
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}
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return ftp;
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bail:
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if (ftp->fp)
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fclose(ftp->fp);
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else if (fd != -1)
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close(fd);
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free(ftp);
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return NULL;
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}
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ftpbuf_t*
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ftp_close(ftpbuf_t *ftp)
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{
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if (ftp == NULL)
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return NULL;
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if (ftp->fp)
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fclose(ftp->fp);
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ftp_gc(ftp);
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free(ftp);
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return NULL;
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}
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void
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ftp_gc(ftpbuf_t *ftp)
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{
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if (ftp == NULL)
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return;
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free(ftp->pwd);
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ftp->pwd = NULL;
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free(ftp->syst);
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ftp->syst = NULL;
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}
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int
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ftp_quit(ftpbuf_t *ftp)
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{
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if (ftp == NULL)
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return 0;
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fprintf(ftp->fp, "QUIT\r\n");
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if (!ftp_getresp(ftp) || ftp->resp != 221)
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return 0;
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free(ftp->pwd);
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ftp->pwd = NULL;
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return 1;
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}
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int
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ftp_login(ftpbuf_t *ftp, const char *user, const char *pass)
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{
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if (ftp == NULL)
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return 0;
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fprintf(ftp->fp, "USER %s\r\n", user);
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if (!ftp_getresp(ftp))
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return 0;
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if (ftp->resp == 230)
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return 1;
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if (ftp->resp != 331)
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return 0;
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fprintf(ftp->fp, "PASS %s\r\n", pass);
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if (!ftp_getresp(ftp))
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return 0;
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return (ftp->resp == 230);
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}
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int
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ftp_reinit(ftpbuf_t *ftp)
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{
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if (ftp == NULL)
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return 0;
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ftp_gc(ftp);
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fprintf(ftp->fp, "REIN\r\n");
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if (!ftp_getresp(ftp) || ftp->resp != 220)
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return 0;
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return 1;
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}
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const char*
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ftp_syst(ftpbuf_t *ftp)
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{
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char *syst, *end;
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if (ftp == NULL)
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return NULL;
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/* default to cached value */
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if (ftp->syst)
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return ftp->syst;
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fprintf(ftp->fp, "SYST\r\n");
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if (!ftp_getresp(ftp) || ftp->resp != 215)
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return NULL;
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syst = ftp->inbuf;
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if ((end = strchr(syst, ' ')))
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*end = 0;
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ftp->syst = strdup(syst);
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if (end)
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*end = ' ';
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return ftp->syst;
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}
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const char*
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ftp_pwd(ftpbuf_t *ftp)
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{
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char *pwd, *end;
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if (ftp == NULL)
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return NULL;
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/* default to cached value */
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if (ftp->pwd)
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return ftp->pwd;
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fprintf(ftp->fp, "PWD\r\n");
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if (!ftp_getresp(ftp) || ftp->resp != 257)
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return NULL;
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/* copy out the pwd from response */
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if ((pwd = strchr(ftp->inbuf, '"')) == NULL)
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return NULL;
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end = strrchr(++pwd, '"');
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*end = 0;
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ftp->pwd = strdup(pwd);
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*end = '"';
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return ftp->pwd;
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}
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int
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ftp_chdir(ftpbuf_t *ftp, const char *dir)
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{
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if (ftp == NULL)
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return 0;
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free(ftp->pwd);
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ftp->pwd = NULL;
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fprintf(ftp->fp, "CWD %s\r\n", dir);
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if (!ftp_getresp(ftp) || ftp->resp != 250)
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return 0;
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return 1;
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}
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int
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ftp_cdup(ftpbuf_t *ftp)
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{
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if (ftp == NULL)
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return 0;
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free(ftp->pwd);
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ftp->pwd = NULL;
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fprintf(ftp->fp, "CDUP\r\n");
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if (!ftp_getresp(ftp) || ftp->resp != 250)
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return 0;
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return 1;
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}
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char*
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ftp_mkdir(ftpbuf_t *ftp, const char *dir)
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{
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char *mkd, *end;
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if (ftp == NULL)
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return NULL;
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fprintf(ftp->fp, "MKD %s\r\n", dir);
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if (!ftp_getresp(ftp) || ftp->resp != 257)
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return NULL;
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/* copy out the dir from response */
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if ((mkd = strchr(ftp->inbuf, '"')) == NULL)
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return NULL;
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end = strrchr(++mkd, '"');
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*end = 0;
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mkd = strdup(mkd);
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*end = '"';
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return mkd;
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}
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int
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ftp_rmdir(ftpbuf_t *ftp, const char *dir)
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{
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if (ftp == NULL)
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return 0;
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fprintf(ftp->fp, "RMD %s\r\n", dir);
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if (!ftp_getresp(ftp) || ftp->resp != 250)
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return 0;
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return 1;
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}
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char**
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ftp_nlist(ftpbuf_t *ftp, const char *path)
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{
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return ftp_genlist(ftp, "NLST", path);
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}
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char**
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ftp_list(ftpbuf_t *ftp, const char *path)
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{
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return ftp_genlist(ftp, "LIST", path);
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}
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int
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ftp_getresp(ftpbuf_t *ftp)
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{
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char tag[4];
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int ch;
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char *buf;
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char *ptr;
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if (ftp == NULL)
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return 0;
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buf = ftp->inbuf;
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ftp->resp = 0;
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do {
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if (!fread(tag, 4, 1, ftp->fp))
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return 0;
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if (tag[3] == '-') {
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while ((ch = getc(ftp->fp)) != '\n')
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if (ch == EOF) {
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return 0;
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}
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}
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else if (tag[3] == ' ') {
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ptr = fgets(buf, FTP_BUFSIZE, ftp->fp);
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if (!ptr || !(ptr = strchr(buf, '\n')))
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return 0;
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if (ptr > buf && ptr[-1] == '\r')
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ptr--;
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*ptr = 0;
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}
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else {
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return 0;
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}
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} while (tag[3] == '-');
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/* translate the tag */
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if (!isdigit(tag[0]) || !isdigit(tag[1]) || !isdigit(tag[2]))
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return 0;
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ftp->resp = 100 * (tag[0] - '0') +
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10 * (tag[1] - '0') +
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(tag[2] - '0');
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return 1;
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}
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int
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ftp_type(ftpbuf_t *ftp, ftptype_t type)
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{
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char typechar;
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if (ftp == NULL)
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return 0;
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if (type == ftp->type)
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return 1;
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if (type == FTPTYPE_ASCII)
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typechar = 'A';
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else if (type == FTPTYPE_IMAGE)
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typechar = 'I';
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else
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return 0;
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fprintf(ftp->fp, "TYPE %c\r\n", typechar);
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if (!ftp_getresp(ftp) || ftp->resp != 200)
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return 0;
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ftp->type = type;
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return 1;
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}
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int
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ftp_get(ftpbuf_t *ftp, FILE *outfp, const char *path, ftptype_t type)
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{
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databuf_t *data = NULL;
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int ch, lastch;
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if (ftp == NULL)
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return 0;
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if (!ftp_type(ftp, type))
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goto bail;
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if ((data = ftp_port(ftp)) == NULL)
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goto bail;
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fprintf(ftp->fp, "RETR %s\r\n", path);
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if (!ftp_getresp(ftp) || ftp->resp != 150)
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goto bail;
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if ((data = data_accept(data)) == NULL)
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goto bail;
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lastch = 0;
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while ((ch = getc(data->fp)) != EOF) {
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if (type == FTPTYPE_ASCII) {
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if (lastch == '\r' && ch != '\n')
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putc('\r', outfp);
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if (ch != '\r')
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putc(ch, outfp);
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lastch = ch;
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}
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else {
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putc(ch, outfp);
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}
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}
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if (type == FTPTYPE_ASCII && lastch == '\r')
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putc('\r', outfp);
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if (ferror(data->fp) || ferror(outfp))
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goto bail;
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data = data_close(data);
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if (!ftp_getresp(ftp) || ftp->resp != 226)
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goto bail;
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return 1;
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bail:
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data_close(data);
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return 0;
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}
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int
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ftp_put(ftpbuf_t *ftp, const char *path, FILE *infp, ftptype_t type)
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{
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databuf_t *data = NULL;
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int ch;
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if (ftp == NULL)
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return 0;
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if (!ftp_type(ftp, type))
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goto bail;
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if ((data = ftp_port(ftp)) == NULL)
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goto bail;
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fprintf(ftp->fp, "STOR %s\r\n", path);
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if (!ftp_getresp(ftp) || ftp->resp != 150)
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goto bail;
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if ((data = data_accept(data)) == NULL)
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goto bail;
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while ((ch = getc(infp)) != EOF) {
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if (type == FTPTYPE_ASCII && ch == '\n')
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putc('\r', data->fp);
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putc(ch, data->fp);
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}
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if (ferror(data->fp) || ferror(infp))
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goto bail;
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data = data_close(data);
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if (!ftp_getresp(ftp) || ftp->resp != 226)
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goto bail;
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return 1;
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bail:
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data_close(data);
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return 0;
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}
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databuf_t*
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ftp_port(ftpbuf_t *ftp)
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{
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int fd = -1;
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databuf_t *data;
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struct sockaddr_in addr;
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int size;
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union {
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unsigned long l[1];
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unsigned short s[2];
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unsigned char c[4];
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} ipbox;
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/* alloc the data structure */
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data = calloc(1, sizeof(*data));
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if (data == NULL) {
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perror("calloc");
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return NULL;
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}
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data->listener = -1;
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data->type = ftp->type;
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/* bind/listen */
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if ((fd = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
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perror("socket");
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goto bail;
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}
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/* bind to a local address */
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memset(&addr, 0, sizeof(addr));
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addr.sin_family = AF_INET;
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addr.sin_addr.s_addr = INADDR_ANY;
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addr.sin_port = 0;
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if (bind(fd, (struct sockaddr*) &addr, sizeof(addr)) == -1) {
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perror("bind");
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goto bail;
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}
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size = sizeof(addr);
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if (getsockname(fd, (struct sockaddr*) &addr, &size) == -1) {
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perror("getsockname");
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goto bail;
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}
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if (listen(fd, 5) == -1) {
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perror("listen");
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goto bail;
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}
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data->listener = fd;
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/* send the PORT */
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ipbox.l[0] = ftp->localaddr.s_addr;
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fprintf(ftp->fp, "PORT %u,%u,%u,%u,",
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ipbox.c[0], ipbox.c[1], ipbox.c[2], ipbox.c[3]);
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ipbox.s[0] = addr.sin_port;
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fprintf(ftp->fp, "%u,%u\r\n",
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ipbox.c[0], ipbox.c[1]);
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if (!ftp_getresp(ftp) || ftp->resp != 200)
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goto bail;
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return data;
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bail:
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if (fd != -1)
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close(fd);
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free(data);
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return NULL;
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}
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databuf_t*
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data_accept(databuf_t *data)
|
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{
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struct sockaddr_in addr;
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int size;
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int fd;
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|
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size = sizeof(addr);
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fd = accept(data->listener, (struct sockaddr*) &addr, &size);
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|
close(data->listener);
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|
data->listener = -1;
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|
|
if (fd == -1) {
|
|
free(data);
|
|
return NULL;
|
|
}
|
|
|
|
if ((data->fp = fdopen(fd, "r+")) == NULL) {
|
|
close(fd);
|
|
free(data);
|
|
return NULL;
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
|
|
databuf_t*
|
|
data_close(databuf_t *data)
|
|
{
|
|
if (data == NULL)
|
|
return NULL;
|
|
if (data->listener != -1)
|
|
close(data->listener);
|
|
if (data->fp)
|
|
fclose(data->fp);
|
|
free(data);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
char**
|
|
ftp_genlist(ftpbuf_t *ftp, const char *cmd, const char *path)
|
|
{
|
|
FILE *tmpfp = NULL;
|
|
databuf_t *data = NULL;
|
|
int ch, lastch;
|
|
int size;
|
|
int lines;
|
|
char **ret = NULL;
|
|
char **entry;
|
|
char *text;
|
|
|
|
|
|
if ((tmpfp = tmpfile()) == NULL)
|
|
return NULL;
|
|
|
|
if (!ftp_type(ftp, FTPTYPE_ASCII))
|
|
goto bail;
|
|
|
|
if ((data = ftp_port(ftp)) == NULL)
|
|
goto bail;
|
|
|
|
if (path)
|
|
fprintf(ftp->fp, "%s %s\r\n", cmd, path);
|
|
else
|
|
fprintf(ftp->fp, "%s\r\n", cmd);
|
|
if (!ftp_getresp(ftp) || ftp->resp != 150)
|
|
goto bail;
|
|
|
|
/* pull data buffer into tmpfile */
|
|
if ((data = data_accept(data)) == NULL)
|
|
goto bail;
|
|
|
|
size = 0;
|
|
lines = 0;
|
|
lastch = 0;
|
|
while ((ch = getc(data->fp)) != EOF) {
|
|
if (ch == '\n' && lastch == '\r')
|
|
lines++;
|
|
else
|
|
size++;
|
|
putc(ch, tmpfp);
|
|
lastch = ch;
|
|
}
|
|
data = data_close(data);
|
|
|
|
if (ferror(tmpfp))
|
|
goto bail;
|
|
|
|
rewind(tmpfp);
|
|
|
|
ret = malloc((lines + 1) * sizeof(char**) + size * sizeof(char*));
|
|
if (ret == NULL) {
|
|
perror("malloc");
|
|
goto bail;
|
|
}
|
|
|
|
entry = ret;
|
|
text = (char*) (ret + lines + 1);
|
|
*entry = text;
|
|
lastch = 0;
|
|
while ((ch = getc(tmpfp)) != EOF) {
|
|
if (ch == '\n' && lastch == '\r') {
|
|
*(text - 1) = 0;
|
|
*++entry = text;
|
|
}
|
|
else {
|
|
*text++ = ch;
|
|
}
|
|
lastch = ch;
|
|
}
|
|
*entry = NULL;
|
|
|
|
if (ferror(tmpfp))
|
|
goto bail;
|
|
|
|
fclose(tmpfp);
|
|
|
|
if (!ftp_getresp(ftp) || ftp->resp != 226) {
|
|
free(ret);
|
|
return NULL;
|
|
}
|
|
|
|
return ret;
|
|
bail:
|
|
data_close(data);
|
|
fclose(tmpfp);
|
|
free(ret);
|
|
return NULL;
|
|
}
|
|
|
|
#endif /* HAVE_FTP */
|