add INVALID type, and auto-set from configuration

src/lib/bio/fd.c

@@ -1364,6 +1364,9 @@ int fr_bio_fd_write_only(fr_bio_t *bio)
 	fr_bio_fd_t *my = talloc_get_type_abort(bio, fr_bio_fd_t);
 
 	switch (my->info.type) {
+	case FR_BIO_FD_INVALID:
+		return -1;
+
 	case FR_BIO_FD_UNCONNECTED:
 		if (my->info.socket.type != SOCK_DGRAM) {
 			fr_strerror_const("Only datagram sockets can be marked 'write-only'");

src/lib/bio/fd.h

@@ -61,6 +61,7 @@ typedef enum {
 } fr_bio_fd_state_t;
 
 typedef enum {
+	FR_BIO_FD_INVALID,		//!< not set
 	FR_BIO_FD_UNCONNECTED,		//!< unconnected UDP / datagram only
 					// updates #fr_bio_fd_packet_ctx_t for reads,
 					// uses #fr_bio_fd_packet_ctx_t for writes

src/lib/bio/fd_config.c

@@ -201,7 +201,7 @@ static int client_transport_parse(TALLOC_CTX *ctx, void *out, void *parent, CONF
 {
 	fr_bio_fd_config_t *fd_config = parent;
 
-	fd_config->type = FR_BIO_FD_CONNECTED;
+	if (fd_config->type == FR_BIO_FD_INVALID) fd_config->type = FR_BIO_FD_CONNECTED;
 
 	return common_transport_parse(ctx, out, parent, ci, rule,
 				      client_transport_names, client_transport_names_len);

src/lib/bio/fd_open.c

@@ -724,6 +724,9 @@ static void fr_bio_fd_name(fr_bio_fd_t *my)
 	fr_bio_fd_config_t const *cfg = my->info.cfg;
 
 	switch (my->info.type) {
+	case FR_BIO_FD_INVALID:
+		return;
+
 	case FR_BIO_FD_UNCONNECTED:
 		fr_assert(cfg->socket_type == SOCK_DGRAM);
 
@@ -830,6 +833,10 @@ int fr_bio_fd_check_config(fr_bio_fd_config_t const *cfg)
 	 *
 	 */
 	switch (cfg->type) {
+	case FR_BIO_FD_INVALID:
+		fr_strerror_const("No connection type was specified");
+		return -1;
+
 	case FR_BIO_FD_CONNECTED:
 		/*
 		 *	Ensure that we have a destination address.
@@ -910,6 +917,9 @@ int fr_bio_fd_open(fr_bio_t *bio, fr_bio_fd_config_t const *cfg)
 		 *
 		 */
 		switch (cfg->type) {
+		case FR_BIO_FD_INVALID:
+			return -1;
+
 		case FR_BIO_FD_CONNECTED:
 			/*
 			 *	No source specified, just bootstrap it from the destination.
@@ -1088,6 +1098,9 @@ int fr_bio_fd_open(fr_bio_t *bio, fr_bio_fd_config_t const *cfg)
 	 *	/ write functions.
 	 */
 	switch (cfg->type) {
+	case FR_BIO_FD_INVALID:
+		return -1;
+
 		/*
 		 *	Unconnected UDP or datagram AF_LOCAL server sockets.
 		 */

src/lib/bio/network.c

@@ -132,6 +132,7 @@ fr_bio_t *fr_bio_network_alloc(TALLOC_CTX *ctx, fr_ipaddr_t const *allow, fr_ipa
 	case FR_BIO_FD_UNCONNECTED:
 		break;
 
+	case FR_BIO_FD_INVALID:
 	case FR_BIO_FD_CONNECTED:
 	case FR_BIO_FD_ACCEPTED:
 		return NULL;