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-rw-r--r--backends/sacn.c91
1 files changed, 78 insertions, 13 deletions
diff --git a/backends/sacn.c b/backends/sacn.c
index 0c0fd10..e395ae2 100644
--- a/backends/sacn.c
+++ b/backends/sacn.c
@@ -29,13 +29,15 @@ static struct /*_sacn_global_config*/ {
sacn_fd* fd;
uint64_t last_announce;
uint32_t next_frame;
+ uint8_t detect;
} global_cfg = {
.source_name = "MIDIMonster",
.cid = {'M', 'I', 'D', 'I', 'M', 'o', 'n', 's', 't', 'e', 'r'},
.fds = 0,
.fd = NULL,
.last_announce = 0,
- .next_frame = 0
+ .next_frame = 0,
+ .detect = 0
};
MM_PLUGIN_API int init(){
@@ -130,6 +132,16 @@ static int sacn_configure(char* option, char* value){
global_cfg.cid[u] = (strtoul(next, &next, 0) & 0xFF);
}
}
+ else if(!strcmp(option, "detect")){
+ global_cfg.detect = 0;
+ if(!strcmp(value, "on")){
+ global_cfg.detect = 1;
+ }
+ else if(!strcmp(value, "verbose")){
+ global_cfg.detect = 2;
+ }
+ return 0;
+ }
else if(!strcmp(option, "bind")){
mmbackend_parse_hostspec(value, &host, &port, &next);
@@ -138,8 +150,13 @@ static int sacn_configure(char* option, char* value){
return 1;
}
- if(next && !strncmp(next, "local", 5)){
- flags = mcast_loop;
+ //parse additional socket options
+ if(next){
+ for(next = strtok(next, " "); next; next = strtok(NULL, " ")){
+ if(!strcmp(next, "local")){
+ flags |= mcast_loop;
+ }
+ }
}
if(sacn_listener(host, port ? port : SACN_PORT, flags)){
@@ -368,7 +385,7 @@ static int sacn_set(instance* inst, size_t num, channel** c, channel_value* v){
//send packet if required
if(mark){
- //find output instance data
+ //find output control data for the instance
for(u = 0; u < global_cfg.fd[data->fd_index].universes; u++){
if(global_cfg.fd[data->fd_index].universe[u].universe == data->uni){
break;
@@ -401,6 +418,9 @@ static int sacn_process_frame(instance* inst, sacn_frame_root* frame, sacn_frame
//source filtering
if(inst_data->filter_enabled && memcmp(inst_data->cid_filter, frame->sender_cid, 16)){
+ if(global_cfg.detect > 1){
+ LOGPF("Discarding data for instance %s due to source filter rule", inst->name);
+ }
return 0;
}
@@ -418,11 +438,19 @@ static int sacn_process_frame(instance* inst, sacn_frame_root* frame, sacn_frame
//handle source priority (currently a 1-bit counter)
if(inst_data->data.last_priority > data->priority){
+ if(global_cfg.detect > 1){
+ LOGPF("Ignoring lower-priority (%d) source on %s, current source is %d", data->priority, inst->name, inst_data->data.last_priority);
+ }
inst_data->data.last_priority = data->priority;
return 0;
}
inst_data->data.last_priority = data->priority;
+ if(!inst_data->last_input && global_cfg.detect){
+ LOGPF("Valid data on instance %s (Universe %u): Source name %.*s, priority %d", inst->name, inst_data->uni, 64, data->source_name, data->priority);
+ }
+ inst_data->last_input = mm_timestamp();
+
//read data (except start code), mark changed channels
for(u = 1; u < be16toh(data->channels); u++){
if(IS_ACTIVE(inst_data->data.map[u - 1])
@@ -583,6 +611,10 @@ static int sacn_handle(size_t num, managed_fd* fds){
if(inst && sacn_process_frame(inst, frame, data)){
LOG("Failed to process frame");
}
+ else if(!inst && global_cfg.detect > 1){
+ //this will only happen with unicast input
+ LOGPF("Received data for unconfigured universe %d on descriptor %" PRIsize_t, be16toh(data->universe), ((uint64_t) fds[u].impl) & 0xFFFF);
+ }
}
}
} while(bytes_read > 0);
@@ -604,6 +636,45 @@ static int sacn_handle(size_t num, managed_fd* fds){
return 0;
}
+static int sacn_start_multicast(instance* inst){
+ sacn_instance_data* data = (sacn_instance_data*) inst->impl;
+ struct sockaddr_storage bound_name = {
+ 0
+ };
+ #ifdef _WIN32
+ struct ip_mreq mcast_req = {
+ .imr_interface.s_addr = INADDR_ANY,
+ #else
+ struct ip_mreqn mcast_req = {
+ .imr_address.s_addr = INADDR_ANY,
+ #endif
+ .imr_multiaddr.s_addr = htobe32(((uint32_t) 0xefff0000) | ((uint32_t) data->uni))
+ };
+ socklen_t bound_length = sizeof(bound_name);
+
+ //select the specific interface to join the mcast group on based on the bind address
+ if(getsockname(global_cfg.fd[data->fd_index].fd, (struct sockaddr*) &bound_name, &bound_length)){
+ LOGPF("Failed to read back local bind address on socket %" PRIsize_t, data->fd_index);
+ return 1;
+ }
+ else if(bound_name.ss_family != AF_INET || !((struct sockaddr_in*) &bound_name)->sin_addr.s_addr){
+ LOGPF("Socket %" PRIsize_t " not bound to a specific IPv4 address, joining multicast input group for instance %s (universe %u) on default interface", data->fd_index, inst->name, data->uni);
+ }
+ else{
+ #ifdef _WIN32
+ mcast_req.imr_interface = ((struct sockaddr_in*) &bound_name)->sin_addr;
+ #else
+ mcast_req.imr_address = ((struct sockaddr_in*) &bound_name)->sin_addr;
+ #endif
+ }
+
+ if(setsockopt(global_cfg.fd[data->fd_index].fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (uint8_t*) &mcast_req, sizeof(mcast_req))){
+ LOGPF("Failed to join Multicast group for universe %u on instance %s: %s", data->uni, inst->name, mmbackend_socket_strerror(errno));
+ }
+
+ return 0;
+}
+
static int sacn_start(size_t n, instance** inst){
size_t u, p;
int rv = 1;
@@ -611,9 +682,6 @@ static int sacn_start(size_t n, instance** inst){
sacn_instance_id id = {
.label = 0
};
- struct ip_mreq mcast_req = {
- .imr_interface = { INADDR_ANY }
- };
struct sockaddr_in* dest_v4 = NULL;
if(!global_cfg.fds){
@@ -641,11 +709,8 @@ static int sacn_start(size_t n, instance** inst){
}
}
- if(!data->unicast_input){
- mcast_req.imr_multiaddr.s_addr = htobe32(((uint32_t) 0xefff0000) | ((uint32_t) data->uni));
- if(setsockopt(global_cfg.fd[data->fd_index].fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (uint8_t*) &mcast_req, sizeof(mcast_req))){
- LOGPF("Failed to join Multicast group for universe %u on instance %s: %s", data->uni, inst[u]->name, mmbackend_socket_strerror(errno));
- }
+ if(!data->unicast_input && sacn_start_multicast(inst[u])){
+ return 1;
}
if(data->xmit_prio){
@@ -667,7 +732,7 @@ static int sacn_start(size_t n, instance** inst){
dest_v4 = (struct sockaddr_in*) (&data->dest_addr);
dest_v4->sin_family = AF_INET;
dest_v4->sin_port = htobe16(strtoul(SACN_PORT, NULL, 10));
- dest_v4->sin_addr = mcast_req.imr_multiaddr;
+ dest_v4->sin_addr.s_addr = htobe32(((uint32_t) 0xefff0000) | ((uint32_t) data->uni));
}
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-07 06:05:22 +0000