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#include <sys/socket.h>
#include <sys/types.h>
#include <netdb.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <ctype.h>
#include "libmmbackend.h"
#include "rtpmidi.h"
#define BACKEND_NAME "rtpmidi"
static struct /*_rtpmidi_global*/ {
int mdns_fd;
char* mdns_name;
uint8_t detect;
} cfg = {
.mdns_fd = -1,
.mdns_name = NULL,
.detect = 0
};
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){
char* host = NULL, *port = NULL;
char next_port[10];
if(!strcmp(option, "mdns-name")){
if(cfg.mdns_name){
fprintf(stderr, "Duplicate mdns-name assignment\n");
return 1;
}
cfg.mdns_name = strdup(value);
if(!cfg.mdns_name){
fprintf(stderr, "Failed to allocate memory\n");
return 1;
}
return 0;
}
else if(!strcmp(option, "mdns-bind")){
if(cfg.mdns_fd >= 0){
fprintf(stderr, "Only one mDNS discovery bind is supported\n");
return 1;
}
mmbackend_parse_hostspec(value, &host, &port);
if(!host){
fprintf(stderr, "Not a valid mDNS bind address: %s\n", value);
return 1;
}
cfg.mdns_fd = mmbackend_socket(host, (port ? port : RTPMIDI_MDNS_PORT), SOCK_DGRAM, 1, 1);
if(cfg.mdns_fd < 0){
fprintf(stderr, "Failed to bind mDNS interface: %s\n", value);
return 1;
}
return 0;
}
else if(!strcmp(option, "detect")){
cfg.detect = 0;
if(!strcmp(value, "on")){
cfg.detect = 1;
}
return 0;
}
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, uint8_t flags){
//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 handle discovery
if(!num){
return 0;
}
//TODO
return 1;
}
static int rtpmidi_start(){
size_t n, u, p;
int rv = 1;
instance** inst = NULL;
rtpmidi_instance_data* data = NULL;
//TODO if mdns name defined and no socket, bind default values
//fetch all defined instances
if(mm_backend_instances(BACKEND_NAME, &n, &inst)){
fprintf(stderr, "Failed to fetch instance list\n");
return 1;
}
if(!n){
free(inst);
return 0;
}
if(!cfg.nfds){
fprintf(stderr, "Failed to start rtpMIDI backend: no descriptors bound\n");
goto bail;
}
if(cfg.mdns_fd < 0){
fprintf(stderr, "No mDNS discovery interface bound, APPLEMIDI session support disabled\n");
}
//TODO initialize all instances
rv = 0;
bail:
free(inst);
return rv;
}
static int rtpmidi_shutdown(){
size_t u;
free(cfg.mdns_name);
if(cfg.mdns_fd >= 0){
close(cfg.mdns_fd);
}
return 0;
}
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