Description:
------------
The current ftp_connect function does not have the feature to bind the outgoing connections to a specific local IP. Yet this functionality is quite easily added. With my very very very basic cpp knowledge I managed to add this feature to the code. Imho it'd be a good idea to add something like this but properly coded to the ftp_ featureset :)


A quick'n dirty changeset which converts ftp_connect(host,port,timeout) to ftp_connect(host,bindip,port)

diff -urN php-5.1.4/ext/ftp/ftp.c php-5.1.4-ftpbind/ext/ftp/ftp.c
--- php-5.1.4/ext/ftp/ftp.c	2006-04-03 11:14:33.000000000 +0200
+++ php-5.1.4-ftpbind/ext/ftp/ftp.c	2006-06-03 15:04:58.718141536 +0200
@@ -121,7 +121,7 @@
 /* {{{ ftp_open
  */
 ftpbuf_t*
-ftp_open(const char *host, short port, long timeout_sec TSRMLS_DC)
+ftp_open(const char *host, const char *bindhost, short port, long timeout_sec TSRMLS_DC)
 {
 	ftpbuf_t		*ftp;
 	socklen_t		 size;
@@ -136,7 +136,7 @@
 
 	ftp->fd = php_network_connect_socket_to_host(host,
 			(unsigned short) (port ? port : 21), SOCK_STREAM,
-			0, &tv, NULL, NULL, NULL, 0 TSRMLS_CC);
+			0, &tv, NULL, NULL, bindhost, 0 TSRMLS_CC);
 	if (ftp->fd == -1) {
 		goto bail;
 	}
diff -urN php-5.1.4/ext/ftp/ftp.h php-5.1.4-ftpbind/ext/ftp/ftp.h
--- php-5.1.4/ext/ftp/ftp.h	2006-01-01 13:50:06.000000000 +0100
+++ php-5.1.4-ftpbind/ext/ftp/ftp.h	2006-06-03 15:04:58.718141536 +0200
@@ -93,7 +93,7 @@
 /* open a FTP connection, returns ftpbuf (NULL on error)
  * port is the ftp port in network byte order, or 0 for the default
  */
-ftpbuf_t*	ftp_open(const char *host, short port, long timeout_sec TSRMLS_DC);
+ftpbuf_t*	ftp_open(const char *host, const char *bindhost, short port, long timeout_sec TSRMLS_DC);
 
 /* quits from the ftp session (it still needs to be closed)
  * return true on success, false on error
diff -urN php-5.1.4/ext/ftp/php_ftp.c php-5.1.4-ftpbind/ext/ftp/php_ftp.c
--- php-5.1.4/ext/ftp/php_ftp.c	2006-01-01 13:50:06.000000000 +0100
+++ php-5.1.4-ftpbind/ext/ftp/php_ftp.c	2006-06-03 15:04:58.718141536 +0200
@@ -147,17 +147,19 @@
 							}
 
 
-/* {{{ proto resource ftp_connect(string host [, int port [, int timeout]])
+/* {{{ proto resource ftp_connect(string host [, string bindhost [, int port [, int timeout]]])
    Opens a FTP stream */
 PHP_FUNCTION(ftp_connect)
 {
 	ftpbuf_t	*ftp;
 	char		*host;
+	char		*bindhost;
 	int		host_len;
+	int		bindhost_len;
 	long 		port = 0;
 	long		timeout_sec = FTP_DEFAULT_TIMEOUT;
 
-	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|ll", &host, &host_len, &port, &timeout_sec) == FAILURE) {
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|s|ll", &host, &host_len, &bindhost, &bindhost_len, &port, &timeout_sec) == FAILURE) {
 		return;