ftp.c

php-4.4.7学习linux时下载的源代码

	int		n;

	tv.tv_sec = 0;
	tv.tv_usec = 1;

	FD_ZERO(&write_set);
	FD_SET(s, &write_set);
	n = select(s + 1, NULL, &write_set, NULL, &tv);
	if (n < 1) {
#ifndef PHP_WIN32
		if (n == 0)
			errno = ETIMEDOUT;
#endif
		return 0;
	}

	return 1;
}
/* }}} */

/* {{{ my_accept
 */
int
my_accept(ftpbuf_t *ftp, int s, struct sockaddr *addr, socklen_t *addrlen)
{
	fd_set		accept_set;
	struct timeval	tv;
	int		n;

	tv.tv_sec = ftp->timeout_sec;
	tv.tv_usec = 0;
	FD_ZERO(&accept_set);
	FD_SET(s, &accept_set);

	n = select(s + 1, &accept_set, NULL, NULL, &tv);
	if (n < 1) {
#if !defined(PHP_WIN32) && !(defined(NETWARE) && defined(USE_WINSOCK))
		if (n == 0)
			errno = ETIMEDOUT;
#endif
		return -1;
	}

	return accept(s, addr, addrlen);
}
/* }}} */

/* {{{ ftp_getdata
 */
databuf_t*
ftp_getdata(ftpbuf_t *ftp TSRMLS_DC)
{
	int			fd = -1;
	databuf_t		*data;
	php_sockaddr_storage addr;
	struct sockaddr *sa;
	socklen_t		size;
	union ipbox		ipbox;
	char			arg[sizeof("255, 255, 255, 255, 255, 255")];
	struct timeval	tv;


	/* ask for a passive connection if we need one */
	if (ftp->pasv && !ftp_pasv(ftp, 1))
		return NULL;

	/* alloc the data structure */
	data = ecalloc(1, sizeof(*data));
	data->listener = -1;
	data->fd = -1;
	data->type = ftp->type;

	sa = (struct sockaddr *) &ftp->localaddr;
	/* bind/listen */
	if ((fd = socket(sa->sa_family, SOCK_STREAM, 0)) == -1) {
		php_error_docref(NULL TSRMLS_CC, E_WARNING, "socket() failed: %s (%d)\n", strerror(errno), errno);
		goto bail;
	}

	/* passive connection handler */
	if (ftp->pasv) {
		/* clear the ready status */
		ftp->pasv = 1;

		/* connect */
		/* Win 95/98 seems not to like size > sizeof(sockaddr_in) */
		size = php_sockaddr_size(&ftp->pasvaddr);
		tv.tv_sec = ftp->timeout_sec;
		tv.tv_usec = 0;
		if (php_connect_nonb(fd, (struct sockaddr*) &ftp->pasvaddr, size, &tv) == -1) {
			php_error_docref(NULL TSRMLS_CC, E_WARNING, "php_connect_nonb() failed: %s (%d)\n", strerror(errno), errno);
			goto bail;
		}

		data->fd = fd;

		ftp->data = data;
		return data;
	}


	/* active (normal) connection */

	/* bind to a local address */
	php_any_addr(sa->sa_family, &addr, 0);
	size = php_sockaddr_size(&addr);

	if (bind(fd, (struct sockaddr*) &addr, size) == -1) {
		php_error_docref(NULL TSRMLS_CC, E_WARNING, "bind() failed: %s (%d)\n", strerror(errno), errno);
		goto bail;
	}

	if (getsockname(fd, (struct sockaddr*) &addr, &size) == -1) {
		php_error_docref(NULL TSRMLS_CC, E_WARNING, "getsockname() failed: %s (%d)\n", strerror(errno), errno);
		goto bail;
	}

	if (listen(fd, 5) == -1) {
		php_error_docref(NULL TSRMLS_CC, E_WARNING, "listen() failed: %s (%d)\n", strerror(errno), errno);
		goto bail;
	}

	data->listener = fd;

#ifdef HAVE_IPV6
	if (sa->sa_family == AF_INET6) {
		/* need to use EPRT */
		char eprtarg[INET6_ADDRSTRLEN + sizeof("|x||xxxxx|")];
		char out[INET6_ADDRSTRLEN];
		inet_ntop(AF_INET6, &((struct sockaddr_in6*) sa)->sin6_addr, out, sizeof(out));
		sprintf(eprtarg, "|2|%s|%hu|", out, ntohs(((struct sockaddr_in6 *) &addr)->sin6_port));

		if (!ftp_putcmd(ftp, "EPRT", eprtarg))
			goto bail;

		if (!ftp_getresp(ftp) || ftp->resp != 200)
			goto bail;

		ftp->data = data;
		return data;
	}
#endif

	/* send the PORT */
	ipbox.ia[0] = ((struct sockaddr_in*) sa)->sin_addr;
	ipbox.s[2] = ((struct sockaddr_in*) &addr)->sin_port;
	sprintf(arg, "%u,%u,%u,%u,%u,%u",
		ipbox.c[0], ipbox.c[1], ipbox.c[2], ipbox.c[3],
		ipbox.c[4], ipbox.c[5]);

	if (!ftp_putcmd(ftp, "PORT", arg))
		goto bail;
	if (!ftp_getresp(ftp) || ftp->resp != 200)
		goto bail;

	ftp->data = data;
	return data;

bail:
	if (fd != -1)
		closesocket(fd);
	efree(data);
	return NULL;
}
/* }}} */

/* {{{ data_accept
 */
databuf_t*
data_accept(databuf_t *data, ftpbuf_t *ftp)
{
	php_sockaddr_storage addr;
	socklen_t			size;

#ifdef HAVE_OPENSSL_EXT
	SSL_CTX		*ctx;
	TSRMLS_FETCH();	
#endif

	if (data->fd != -1)
		goto data_accepted;

	size = sizeof(addr);
	data->fd = my_accept(ftp, data->listener, (struct sockaddr*) &addr, &size);
	closesocket(data->listener);
	data->listener = -1;

	if (data->fd == -1) {
		efree(data);
		return NULL;
	}

data_accepted:
#ifdef HAVE_OPENSSL_EXT
	
	/* now enable ssl if we need to */
	if (ftp->use_ssl && ftp->use_ssl_for_data) {
		ctx = SSL_CTX_new(SSLv23_client_method());
		if (ctx == NULL) {
			php_error_docref(NULL TSRMLS_CC, E_WARNING, "data_accept: failed to create the SSL context");
			return 0;
		}

		SSL_CTX_set_options(ctx, SSL_OP_ALL);

		data->ssl_handle = SSL_new(ctx);
		if (data->ssl_handle == NULL) {
			php_error_docref(NULL TSRMLS_CC, E_WARNING, "data_accept: failed to create the SSL handle");
			SSL_CTX_free(ctx);
			return 0;
		}
			
		
		SSL_set_fd(data->ssl_handle, data->fd);

		if (ftp->old_ssl) {
			SSL_copy_session_id(data->ssl_handle, ftp->ssl_handle);
		}
			
		if (SSL_connect(data->ssl_handle) <= 0) {
			php_error_docref(NULL TSRMLS_CC, E_WARNING, "data_accept: SSL/TLS handshake failed");
			SSL_shutdown(data->ssl_handle);
			return 0;
		}
			
		data->ssl_active = 1;
	}	

#endif

	return data;
}
/* }}} */

/* {{{ data_close
 */
databuf_t*
data_close(ftpbuf_t *ftp, databuf_t *data)
{
	if (data == NULL)
		return NULL;
	if (data->listener != -1) {
#ifdef HAVE_OPENSSL_EXT
		if (data->ssl_active) {
			SSL_shutdown(data->ssl_handle);
			data->ssl_active = 0;
		}
#endif				
		closesocket(data->listener);
	}	
	if (data->fd != -1) {
#ifdef HAVE_OPENSSL_EXT
		if (data->ssl_active) {
			SSL_shutdown(data->ssl_handle);
			data->ssl_active = 0;
		}
#endif				
		closesocket(data->fd);
	}	
	if (ftp) {
		ftp->data = NULL;
	}
	efree(data);
	return NULL;
}
/* }}} */

/* {{{ ftp_genlist
 */
char**
ftp_genlist(ftpbuf_t *ftp, const char *cmd, const char *path TSRMLS_DC)
{
	php_stream	*tmpstream = NULL;
	databuf_t	*data = NULL;
	char		*ptr;
	int		ch, lastch;
	int		size, rcvd;
	int		lines;
	char		**ret = NULL;
	char		**entry;
	char		*text;

	if ((tmpstream = php_stream_fopen_tmpfile()) == NULL) {
		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to create temporary file.  Check permissions in temporary files directory.");
		return NULL;
	}

	if (!ftp_type(ftp, FTPTYPE_ASCII))
		goto bail;

	if ((data = ftp_getdata(ftp TSRMLS_CC)) == NULL)
		goto bail;
	ftp->data = data;	

	if (!ftp_putcmd(ftp, cmd, path))
		goto bail;
	if (!ftp_getresp(ftp) || (ftp->resp != 150 && ftp->resp != 125 && ftp->resp != 226))
		goto bail;

	/* some servers don't open a ftp-data connection if the directory is empty */
	if (ftp->resp == 226) {
		ftp->data = data_close(ftp, data);
		php_stream_close(tmpstream);
		return ecalloc(1, sizeof(char**));
	}

	/* pull data buffer into tmpfile */
	if ((data = data_accept(data, ftp)) == NULL)
		goto bail;

	size = 0;
	lines = 0;
	lastch = 0;
	while ((rcvd = my_recv(ftp, data->fd, data->buf, FTP_BUFSIZE))) {
		if (rcvd == -1)
			goto bail;

		php_stream_write(tmpstream, data->buf, rcvd);

		size += rcvd;
		for (ptr = data->buf; rcvd; rcvd--, ptr++) {
			if (*ptr == '\n' && lastch == '\r')
				lines++;
			else
				size++;
			lastch = *ptr;
		}
	}

	ftp->data = data = data_close(ftp, data);

	php_stream_rewind(tmpstream);

	ret = emalloc((lines + 1) * sizeof(char**) + size * sizeof(char*));

	entry = ret;
	text = (char*) (ret + lines + 1);
	*entry = text;
	lastch = 0;
	while ((ch = php_stream_getc(tmpstream)) != EOF) {
		if (ch == '\n' && lastch == '\r') {
			*(text - 1) = 0;
			*++entry = text;
		}
		else {
			*text++ = ch;
		}
		lastch = ch;
	}
	*entry = NULL;

	php_stream_close(tmpstream);

	if (!ftp_getresp(ftp) || (ftp->resp != 226 && ftp->resp != 250)) {
		efree(ret);
		return NULL;
	}

	return ret;
bail:
	ftp->data = data_close(ftp, data);
	php_stream_close(tmpstream);
	if (ret)
		efree(ret);
	return NULL;
}
/* }}} */

/* {{{ ftp_nb_get
 */
int
ftp_nb_get(ftpbuf_t *ftp, php_stream *outstream, const char *path, ftptype_t type, int resumepos TSRMLS_DC)
{
	databuf_t		*data = NULL;
	char			arg[11];

	if (ftp == NULL)
		goto bail;

	if (!ftp_type(ftp, type)) {
		goto bail;
	}

	if ((data = ftp_getdata(ftp TSRMLS_CC)) == NULL) {
		goto bail;
	}

	if (resumepos>0) {
		sprintf(arg, "%u", resumepos);
		if (!ftp_putcmd(ftp, "REST", arg)) {
			goto bail;
		}
		if (!ftp_getresp(ftp) || (ftp->resp != 350)) {
			goto bail;
		}
	}

	if (!ftp_putcmd(ftp, "RETR", path)) {
		goto bail;
	}
	if (!ftp_getresp(ftp) || (ftp->resp != 150 && ftp->resp != 125)) {
		goto bail;
	}

	if ((data = data_accept(data, ftp)) == NULL) {
		goto bail;
	}

	ftp->data = data;
	ftp->stream = outstream;
	ftp->lastch = 0;
	ftp->nb = 1;

	return (ftp_nb_continue_read(ftp));

bail:
	ftp->data = data_close(ftp, data);
	return PHP_FTP_FAILED;
}
/* }}} */

/* {{{ ftp_nb_continue_read
 */
int
ftp_nb_continue_read(ftpbuf_t *ftp)
{
	databuf_t	*data = NULL;
	char		*ptr;
	int			lastch;
	size_t		rcvd;
	ftptype_t	type;
	TSRMLS_FETCH();

	data = ftp->data;

	/* check if there is already more data */
	if (!data_available(ftp, data->fd)) {
		return PHP_FTP_MOREDATA;
	}

	type = ftp->type;

	lastch = ftp->lastch;
	if ((rcvd = my_recv(ftp, data->fd, data->buf, FTP_BUFSIZE))) {
		if (rcvd == -1) {
			goto bail;
		}

		if (type == FTPTYPE_ASCII) {
			for (ptr = data->buf; rcvd; rcvd--, ptr++) {
				if (lastch == '\r' && *ptr != '\n')
					php_stream_putc(ftp->stream, '\r');
				if (*ptr != '\r')
					php_stream_putc(ftp->stream, *ptr);
				lastch = *ptr;
			}
		}
		else {
			if (rcvd != php_stream_write(ftp->stream, data->buf, rcvd))
				goto bail;
		}

		ftp->lastch = lastch;
		return PHP_FTP_MOREDATA;
	}

	if (type == FTPTYPE_ASCII && lastch == '\r')
		php_stream_putc(ftp->stream, '\r');

	ftp->data = data = data_close(ftp, data);

	if (!ftp_getresp(ftp) || (ftp->resp != 226 && ftp->resp != 250)) {
		goto bail;
	}

	ftp->nb = 0;
	return PHP_FTP_FINISHED;
bail:
	ftp->nb = 0;
	ftp->data = data_close(ftp, data);
	return PHP_FTP_FAILED;
}
/* }}} */

/* {{{ ftp_nb_put
 */
int
ftp_nb_put(ftpbuf_t *ftp, const char *path, php_stream *instream, ftptype_t type, int startpos TSRMLS_DC)
{
	databuf_t		*data = NULL;
	char			arg[11];

	if (ftp == NULL)
		return 0;

	if (!ftp_type(ftp, type))
		goto bail;

	if ((data = ftp_getdata(ftp TSRMLS_CC)) == NULL)
		goto bail;

	if (startpos>0) {
		if (startpos > 2147483647) {
			php_error_docref(NULL TSRMLS_CC, E_WARNING, "PHP cannot handle files with a size greater then 2147483647 bytes.\n");
			goto bail;
		}
		sprintf(arg, "%u", startpos);
		if (!ftp_putcmd(ftp, "REST", arg)) {
			goto bail;
		}
		if (!ftp_getresp(ftp) || (ftp->resp != 350)) {
			goto bail;
		}
	}

	if (!ftp_putcmd(ftp, "STOR", path))
		goto bail;
	if (!ftp_getresp(ftp) || (ftp->resp != 150 && ftp->resp != 125))
		goto bail;

	if ((data = data_accept(data, ftp)) == NULL)
		goto bail;

	ftp->data = data;
	ftp->stream = instream;
	ftp->lastch = 0;
	ftp->nb = 1;

	return (ftp_nb_continue_write(ftp));

bail:
	ftp->data = data_close(ftp, data);
	return PHP_FTP_FAILED;

}
/* }}} */


/* {{{ ftp_nb_continue_write
 */
int
ftp_nb_continue_write(ftpbuf_t *ftp)
{
	int			size;
	char			*ptr;
	int 			ch;
	TSRMLS_FETCH();


	/* check if we can write more data */
	if (!data_writeable(ftp, ftp->data->fd)) {
		return PHP_FTP_MOREDATA;
	}

	size = 0;
	ptr = ftp->data->buf;
	while (!php_stream_eof(ftp->stream) && (ch = php_stream_getc(ftp->stream))!=EOF) {

		if (ch == '\n' && ftp->type == FTPTYPE_ASCII) {
			*ptr++ = '\r';
			size++;
		}

		*ptr++ = ch;
		size++;

		/* flush if necessary */
		if (FTP_BUFSIZE - size < 2) {
			if (my_send(ftp, ftp->data->fd, ftp->data->buf, size) != size)
				goto bail;
			return PHP_FTP_MOREDATA;
		}

	}

	if (size && my_send(ftp, ftp->data->fd, ftp->data->buf, size) != size)
		goto bail;

	ftp->data = data_close(ftp, ftp->data);

	if (!ftp_getresp(ftp) || (ftp->resp != 226 && ftp->resp != 250))
		goto bail;

	ftp->nb = 0;
	return PHP_FTP_FINISHED;
bail:
	ftp->data = data_close(ftp, ftp->data);
	ftp->nb = 0;
	return PHP_FTP_FAILED;
}
/* }}} */


#endif /* HAVE_FTP */

/*
 * Local variables:
 * tab-width: 4
 * c-basic-offset: 4
 * End:
 * vim600: sw=4 ts=4 fdm=marker
 * vim<600: sw=4 ts=4
 */