Rough rtpmidi backend skeleton

1 files changed, 130 insertions, 0 deletions

diff --git a/backends/rtpmidi.c b/backends/rtpmidi.c
new file mode 100644
index 0000000..f77f93b
--- /dev/null
+++ b/backends/rtpmidi.c
@@ -0,0 +1,130 @@
+#include <string.h>
+#include <unistd.h>
+
+#include "rtpmidi.h"
+
+#define BACKEND_NAME "rtpmidi"
+
+/** rtpMIDI backend w/ AppleMIDI support
+ *
+ * Global configuration
+ * 	bind = 0.0.0.0
+ * 	apple-bind = 0.0.0.1
+ * 	mdns-bind = 0.0.0.0
+ * 	mdns-name = mdns-name
+ * 
+ * Instance configuration
+ * 	interface = 0
+ * 	(opt) ssrc = X
+ *
+ * 	apple-session = session-name
+ * 	apple-invite = invite-peer
+ * 	apple-allow = *
+ * or
+ * 	connect = 
+ * 	reply-any = 1
+ */
+
+static struct /*_rtpmidi_global*/ {
+	int mdns_fd;
+	char* mdns_name;
+	size_t nfds;
+	rtpmidi_fd* fds;
+} cfg = {
+	.mdns_fd = -1,
+	.mdns_name = NULL,
+	.nfds = 0,
+	.fds = NULL
+};
+
+int init(){
+	backend rtpmidi = {
+		.name = BACKEND_NAME,
+		.conf = rtpmidi_configure,
+		.create = rtpmidi_instance,
+		.conf_instance = rtpmidi_configure_instance,
+		.channel = rtpmidi_channel,
+		.handle = rtpmidi_set,
+		.process = rtpmidi_handle,
+		.start = rtpmidi_start,
+		.shutdown = rtpmidi_shutdown
+	};
+
+	if(mm_backend_register(rtpmidi)){
+		fprintf(stderr, "Failed to register rtpMIDI backend\n");
+		return 1;
+	}
+
+	return 0;
+}
+
+static int rtpmidi_configure(char* option, char* value){
+	if(!strcmp(option, "mdns-name")){
+		if(cfg.mdns_name){
+			free(cfg.mdns_name);
+		}
+
+		cfg.mdns_name = strdup(value);
+		if(!cfg.mdns_name){
+			fprintf(stderr, "Failed to allocate memory\n");
+			return 1;
+		}
+		//TODO this should create the mdns broadcaster and responder socket
+		return 0;
+	}
+	else if(!strcmp(option, "bind")){
+		//TODO open listening control and data fds
+	}
+
+	fprintf(stderr, "Unknown rtpMIDI backend option %s\n", option);
+	return 1;
+}
+
+static int rtpmidi_configure_instance(instance* inst, char* option, char* value){
+	//TODO
+	return 1;
+}
+
+static instance* rtpmidi_instance(){
+	//TODO
+	return NULL;
+}
+
+static channel* rtpmidi_channel(instance* inst, char* spec){
+	//TODO
+	return NULL;
+}
+
+static int rtpmidi_set(instance* inst, size_t num, channel** c, channel_value* v){
+	//TODO
+	return 1;
+}
+
+static int rtpmidi_handle(size_t num, managed_fd* fds){
+	//TODO
+	return 1;
+}
+
+static int rtpmidi_start(){
+	//TODO
+	return 1;
+}
+
+static int rtpmidi_shutdown(){
+	size_t u;
+
+	free(cfg.mdns_name);
+	if(cfg.mdns_fd >= 0){
+		close(cfg.mdns_fd);
+	}
+
+	for(u = 0; u < cfg.nfds; u++){
+		if(cfg.fds[u].data >= 0){
+			close(cfg.fds[u].data);
+		}
+		if(cfg.fds[u].control >= 0){
+			close(cfg.fds[u].control);
+		}
+	}
+	return 0;
+}