[uri] Allow tftp_uri() to construct a URI with a custom port

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/core/uri.c

  * Construct TFTP URI from next-server and filename
  *
  * @v next_server	Next-server address
+ * @v port		Port number, or zero to use the default port
  * @v filename		Filename
  * @ret uri		URI, or NULL on failure
  *
  * generic URI parser.  We provide a mechanism for directly
  * constructing a TFTP URI from the next-server and filename.
  */
-struct uri * tftp_uri ( struct in_addr next_server, const char *filename ) {
+struct uri * tftp_uri ( struct in_addr next_server, unsigned int port,
+			const char *filename ) {
+	char buf[ 6 /* "65535" + NUL */ ];
 	struct uri uri;
 
 	memset ( &uri, 0, sizeof ( uri ) );
 	uri.scheme = "tftp";
 	uri.host = inet_ntoa ( next_server );
+	if ( port ) {
+		snprintf ( buf, sizeof ( buf ), "%d", port );
+		uri.port = buf;
+	}
 	uri.path = filename;
 	return uri_dup ( &uri );
 }

src/include/ipxe/uri.h

 			     const char *relative_path );
 extern struct uri * resolve_uri ( const struct uri *base_uri,
 				  struct uri *relative_uri );
-extern struct uri * tftp_uri ( struct in_addr next_server,
+extern struct uri * tftp_uri ( struct in_addr next_server, unsigned int port,
 			       const char *filename );
 extern void churi ( struct uri *uri );
 

src/tests/uri_test.c

 struct uri_tftp_test {
 	/** Next-server address */
 	struct in_addr next_server;
+	/** Port number */
+	unsigned int port;
 	/** Filename */
 	const char *filename;
 	/** URI */
 	size_t len;
 
 	/* Construct URI */
-	uri = tftp_uri ( test->next_server, test->filename );
+	uri = tftp_uri ( test->next_server, test->port, test->filename );
 	okx ( uri != NULL, file, line );
 	if ( uri ) {
 		uri_okx ( uri, &test->uri, file, line );
 
 /** TFTP URI with absolute path */
 static struct uri_tftp_test uri_tftp_absolute = {
-	{ .s_addr = htonl ( 0xc0a80002 ) /* 192.168.0.2 */ },
+	{ .s_addr = htonl ( 0xc0a80002 ) /* 192.168.0.2 */ }, 0,
 	"/absolute/path",
 	{
 		.scheme = "tftp",
 
 /** TFTP URI with relative path */
 static struct uri_tftp_test uri_tftp_relative = {
-	{ .s_addr = htonl ( 0xc0a80003 ) /* 192.168.0.3 */ },
+	{ .s_addr = htonl ( 0xc0a80003 ) /* 192.168.0.3 */ }, 0,
 	"relative/path",
 	{
 		.scheme = "tftp",
 
 /** TFTP URI with path containing special characters */
 static struct uri_tftp_test uri_tftp_icky = {
-	{ .s_addr = htonl ( 0x0a000006 ) /* 10.0.0.6 */ },
+	{ .s_addr = htonl ( 0x0a000006 ) /* 10.0.0.6 */ }, 0,
 	"C:\\tftpboot\\icky#path",
 	{
 		.scheme = "tftp",
 	"tftp://10.0.0.6/C%3A\\tftpboot\\icky%23path",
 };
 
+/** TFTP URI with custom port */
+static struct uri_tftp_test uri_tftp_port = {
+	{ .s_addr = htonl ( 0xc0a80001 ) /* 192.168.0.1 */ }, 4069,
+	"/another/path",
+	{
+		.scheme = "tftp",
+		.host = "192.168.0.1",
+		.port = "4069",
+		.path = "/another/path",
+	},
+	"tftp://192.168.0.1:4069/another/path",
+};
+
 /** Current working URI test */
 static struct uri_churi_test uri_churi[] = {
 	{
 	uri_tftp_ok ( &uri_tftp_absolute );
 	uri_tftp_ok ( &uri_tftp_relative );
 	uri_tftp_ok ( &uri_tftp_icky );
+	uri_tftp_ok ( &uri_tftp_port );
 
 	/* Current working URI tests */
 	uri_churi_ok ( uri_churi );

src/usr/autoboot.c

 	/* Construct a TFTP URI for the filename, if applicable */
 	if ( next_server.s_addr && filename[0] && ! uri_is_absolute ( uri ) ) {
 		uri_put ( uri );
-		uri = tftp_uri ( next_server, filename );
+		uri = tftp_uri ( next_server, 0, filename );
 		if ( ! uri )
 			return NULL;
 	}