Move backend implementations to subdirectory

1 files changed, 0 insertions, 562 deletions

diff --git a/artnet.c b/artnet.c
deleted file mode 100644
index c16e630..0000000
--- a/artnet.c
+++ /dev/null
@@ -1,562 +0,0 @@
-#include <string.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <ctype.h>
-#include <errno.h>
-
-#include "artnet.h"
-#define MAX_FDS 255
-#define BACKEND_NAME "artnet"
-
-static uint8_t default_net = 0;
-static size_t artnet_fds = 0;
-static artnet_descriptor* artnet_fd = NULL;
-
-static int artnet_listener(char* host, char* port){
-	int fd = -1, status, yes = 1, flags;
-	struct addrinfo hints = {
-		.ai_family = AF_UNSPEC,
-		.ai_socktype = SOCK_DGRAM,
-		.ai_flags = AI_PASSIVE
-	};
-	struct addrinfo* info;
-	struct addrinfo* addr_it;
-
-	if(artnet_fds >= MAX_FDS){
-		fprintf(stderr, "ArtNet backend descriptor limit reached\n");
-		return -1;
-	}
-
-	status = getaddrinfo(host, port, &hints, &info);
-	if(status){
-		fprintf(stderr, "Failed to get socket info for %s port %s: %s\n", host, port, gai_strerror(status));
-		return -1;
-	}
-
-	for(addr_it = info; addr_it != NULL; addr_it = addr_it->ai_next){
-		fd = socket(addr_it->ai_family, addr_it->ai_socktype, addr_it->ai_protocol);
-		if(fd < 0){
-			continue;
-		}
-
-		yes = 1;
-		if(setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void*)&yes, sizeof(yes)) < 0){
-			fprintf(stderr, "Failed to set SO_REUSEADDR on socket\n");
-		}
-
-		yes = 1;
-		if(setsockopt(fd, SOL_SOCKET, SO_BROADCAST, (void*)&yes, sizeof(yes)) < 0){
-			fprintf(stderr, "Failed to set SO_BROADCAST on socket\n");
-		}
-
-		yes = 0;
-		if(setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, (void*)&yes, sizeof(yes)) < 0){
-			fprintf(stderr, "Failed to unset IP_MULTICAST_LOOP option: %s\n", strerror(errno));
-		}
-
-		status = bind(fd, addr_it->ai_addr, addr_it->ai_addrlen);
-		if(status < 0){
-			close(fd);
-			continue;
-		}
-
-		break;
-	}
-
-	freeaddrinfo(info);
-
-	if(!addr_it){
-		fprintf(stderr, "Failed to create listening socket for %s port %s\n", host, port);
-		return -1;
-	}
-
-	//set nonblocking
-	flags = fcntl(fd, F_GETFL, 0);
-	if(fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0){
-		fprintf(stderr, "Failed to set ArtNet descriptor nonblocking\n");
-		return -1;
-	}
-
-	//store fd
-	artnet_fd = realloc(artnet_fd, (artnet_fds + 1) * sizeof(artnet_descriptor));
-	if(!artnet_fd){
-		fprintf(stderr, "Failed to allocate memory\n");
-		return -1;
-	}
-
-	fprintf(stderr, "ArtNet backend interface %zu bound to %s port %s\n", artnet_fds, host, port);
-	artnet_fd[artnet_fds].fd = fd;
-	artnet_fd[artnet_fds].output_instances = 0;
-	artnet_fd[artnet_fds].output_instance = NULL;
-	artnet_fd[artnet_fds].last_frame = NULL;
-	artnet_fds++;
-	return 0;
-}
-
-static int artnet_parse_addr(char* host, char* port, struct sockaddr_storage* addr, socklen_t* len){
-	struct addrinfo* head;
-	struct addrinfo hints = {
-		.ai_family = AF_UNSPEC,
-		.ai_socktype = SOCK_DGRAM
-	};
-
-	int error = getaddrinfo(host, port, &hints, &head);
-	if(error || !head){
-		fprintf(stderr, "Failed to parse address %s port %s: %s\n", host, port, gai_strerror(error));
-		return 1;
-	}
-
-	memcpy(addr, head->ai_addr, head->ai_addrlen);
-	*len = head->ai_addrlen;
-
-	freeaddrinfo(head);
-	return 0;
-}
-
-static int artnet_separate_hostspec(char* in, char** host, char** port){
-	size_t u;
-
-	if(!in || !host || !port){
-		return 1;
-	}
-
-	for(u = 0; in[u] && !isspace(in[u]); u++){
-	}
-
-	//guess
-	*host = in;
-
-	if(in[u]){
-		in[u] = 0;
-		*port = in + u + 1;
-	}
-	else{
-		//no port given
-		*port = ARTNET_PORT;
-	}
-	return 0;
-}
-
-int init(){
-	backend artnet = {
-		.name = BACKEND_NAME,
-		.conf = artnet_configure,
-		.create = artnet_instance,
-		.conf_instance = artnet_configure_instance,
-		.channel = artnet_channel,
-		.handle = artnet_set,
-		.process = artnet_handle,
-		.start = artnet_start,
-		.shutdown = artnet_shutdown
-	};
-
-	//register backend
-	if(mm_backend_register(artnet)){
-		fprintf(stderr, "Failed to register ArtNet backend\n");
-		return 1;
-	}
-	return 0;
-}
-
-static int artnet_configure(char* option, char* value){
-	char* host = NULL, *port = NULL;
-	if(!strcmp(option, "net")){
-		//configure default net
-		default_net = strtoul(value, NULL, 0);
-		return 0;
-	}
-	else if(!strcmp(option, "bind")){
-		if(artnet_separate_hostspec(value, &host, &port)){
-			fprintf(stderr, "Not a valid ArtNet bind address: %s\n", value);
-			return 1;
-		}
-
-		if(artnet_listener(host, port)){
-			fprintf(stderr, "Failed to bind ArtNet descriptor: %s\n", value);
-			return 1;
-		}
-		return 0;
-	}
-
-	fprintf(stderr, "Unknown ArtNet backend option %s\n", option);
-	return 1;
-}
-
-static instance* artnet_instance(){
-	artnet_instance_data* data = NULL;
-	instance* inst = mm_instance();
-	if(!inst){
-		return NULL;
-	}
-
-	data = calloc(1, sizeof(artnet_instance_data));
-	if(!data){
-		fprintf(stderr, "Failed to allocate memory\n");
-		return NULL;
-	}
-
-	data->net = default_net;
-
-	inst->impl = data;
-	return inst;
-}
-
-static int artnet_configure_instance(instance* inst, char* option, char* value){
-	char* host = NULL, *port = NULL;
-	artnet_instance_data* data = (artnet_instance_data*) inst->impl;
-
-	if(!strcmp(option, "net")){
-		data->net = strtoul(value, NULL, 0);
-		return 0;
-	}
-	else if(!strcmp(option, "uni") || !strcmp(option, "universe")){
-		data->uni = strtoul(value, NULL, 0);
-		return 0;
-	}
-	else if(!strcmp(option, "iface") || !strcmp(option, "interface")){
-		data->fd_index = strtoul(value, NULL, 0);
-
-		if(data->fd_index >= artnet_fds){
-			fprintf(stderr, "Invalid interface configured for ArtNet instance %s\n", inst->name);
-			return 1;
-		}
-		return 0;
-	}
-	else if(!strcmp(option, "dest") || !strcmp(option, "destination")){
-		if(artnet_separate_hostspec(value, &host, &port)){
-			fprintf(stderr, "Not a valid ArtNet destination for instance %s\n", inst->name);
-			return 1;
-		}
-
-		return artnet_parse_addr(host, port, &data->dest_addr, &data->dest_len);
-	}
-
-	fprintf(stderr, "Unknown ArtNet option %s for instance %s\n", option, inst->name);
-	return 1;
-}
-
-static channel* artnet_channel(instance* inst, char* spec){
-	artnet_instance_data* data = (artnet_instance_data*) inst->impl;
-	char* spec_next = spec;
-	unsigned chan_a = strtoul(spec, &spec_next, 10);
-	unsigned chan_b = 0;
-
-	//primary channel sanity check
-	if(!chan_a || chan_a > 512){
-		fprintf(stderr, "Invalid ArtNet channel specification %s\n", spec);
-		return NULL;
-	}
-	chan_a--;
-
-	//secondary channel setup
-	if(*spec_next == '+'){
-		chan_b = strtoul(spec_next + 1, NULL, 10);
-		if(!chan_b || chan_b > 512){
-			fprintf(stderr, "Invalid wide-channel spec %s\n", spec);
-			return NULL;
-		}
-		chan_b--;
-
-		//if mapped mode differs, bail
-		if(IS_ACTIVE(data->data.map[chan_b]) && data->data.map[chan_b] != (MAP_FINE | chan_a)){
-			fprintf(stderr, "Fine channel already mapped for ArtNet spec %s\n", spec);
-			return NULL;
-		}
-
-		data->data.map[chan_b] = MAP_FINE | chan_a;
-	}
-
-	//check current map mode
-	if(IS_ACTIVE(data->data.map[chan_a])){
-		if((*spec_next == '+' && data->data.map[chan_a] != (MAP_COARSE | chan_b))
-				|| (*spec_next != '+' && data->data.map[chan_a] != (MAP_SINGLE | chan_a))){
-			fprintf(stderr, "Primary ArtNet channel already mapped at differing mode: %s\n", spec);
-			return NULL;
-		}
-	}
-	data->data.map[chan_a] = (*spec_next == '+') ? (MAP_COARSE | chan_b) : (MAP_SINGLE | chan_a);
-
-	return mm_channel(inst, chan_a, 1);
-}
-
-static int artnet_transmit(instance* inst){
-	size_t u;
-	artnet_instance_data* data = (artnet_instance_data*) inst->impl;
-	//output frame
-	artnet_pkt frame = {
-		.magic = {'A', 'r', 't', '-', 'N', 'e', 't', 0x00},
-		.opcode = htobe16(OpDmx),
-		.version = htobe16(ARTNET_VERSION),
-		.sequence = data->data.seq++,
-		.port = 0,
-		.universe = data->uni,
-		.net = data->net,
-		.length = htobe16(512),
-		.data = {0}
-	};
-	memcpy(frame.data, data->data.out, 512);
-
-	if(sendto(artnet_fd[data->fd_index].fd, &frame, sizeof(frame), 0, (struct sockaddr*) &data->dest_addr, data->dest_len) < 0){
-		fprintf(stderr, "Failed to output ArtNet frame for instance %s: %s\n", inst->name, strerror(errno));
-	}
-
-	//update last frame timestamp
-	for(u = 0; u < artnet_fd[data->fd_index].output_instances; u++){
-		if(artnet_fd[data->fd_index].output_instance[u].label == inst->ident){
-			artnet_fd[data->fd_index].last_frame[u] = mm_timestamp();
-		}
-	}
-	return 0;
-}
-
-static int artnet_set(instance* inst, size_t num, channel** c, channel_value* v){
-	size_t u, mark = 0;
-	artnet_instance_data* data = (artnet_instance_data*) inst->impl;
-
-	if(!data->dest_len){
-		fprintf(stderr, "ArtNet instance %s not enabled for output (%zu channel events)\n", inst->name, num);
-		return 0;
-	}
-
-	//FIXME maybe introduce minimum frame interval
-	for(u = 0; u < num; u++){
-		if(IS_WIDE(data->data.map[c[u]->ident])){
-			uint32_t val = v[u].normalised * ((double) 0xFFFF);
-			//the primary (coarse) channel is the one registered to the core, so we don't have to check for that
-			if(data->data.out[c[u]->ident] != ((val >> 8) & 0xFF)){
-				mark = 1;
-				data->data.out[c[u]->ident] = (val >> 8) & 0xFF;
-			}
-
-			if(data->data.out[MAPPED_CHANNEL(data->data.map[c[u]->ident])] != (val & 0xFF)){
-				mark = 1;
-				data->data.out[MAPPED_CHANNEL(data->data.map[c[u]->ident])] = val & 0xFF;
-			}
-		}
-		else if(data->data.out[c[u]->ident] != (v[u].normalised * 255.0)){
-			mark = 1;
-			data->data.out[c[u]->ident] = v[u].normalised * 255.0;
-		}
-	}
-
-	if(mark){
-		return artnet_transmit(inst);
-	}
-
-	return 0;
-}
-
-static inline int artnet_process_frame(instance* inst, artnet_pkt* frame){
-	size_t p, max_mark = 0;
-	uint16_t wide_val = 0;
-	channel* chan = NULL;
-	channel_value val;
-	artnet_instance_data* data = (artnet_instance_data*) inst->impl;
-
-	if(be16toh(frame->length) > 512){
-		fprintf(stderr, "Invalid ArtNet frame channel count\n");
-		return 1;
-	}
-
-	//read data, mark update channels
-	for(p = 0; p < be16toh(frame->length); p++){
-		if(IS_ACTIVE(data->data.map[p]) && frame->data[p] != data->data.in[p]){
-			data->data.in[p] = frame->data[p];
-			data->data.map[p] |= MAP_MARK;
-			max_mark = p;
-		}
-	}
-
-	//generate events
-	for(p = 0; p <= max_mark; p++){
-		if(data->data.map[p] & MAP_MARK){
-			data->data.map[p] &= ~MAP_MARK;
-			if(data->data.map[p] & MAP_FINE){
-				chan = mm_channel(inst, MAPPED_CHANNEL(data->data.map[p]), 0);
-			}
-			else{
-				chan = mm_channel(inst, p, 0);
-			}
-
-			if(!chan){
-				fprintf(stderr, "Active channel %zu on %s not known to core\n", p, inst->name);
-				return 1;
-			}
-
-			if(IS_WIDE(data->data.map[p])){
-				data->data.map[MAPPED_CHANNEL(data->data.map[p])] &= ~MAP_MARK;
-				wide_val = data->data.in[p] << ((data->data.map[p] & MAP_COARSE) ? 8 : 0);
-				wide_val |= data->data.in[MAPPED_CHANNEL(data->data.map[p])] << ((data->data.map[p] & MAP_COARSE) ? 0 : 8);
-
-				val.raw.u64 = wide_val;
-				val.normalised = (double) wide_val / (double) 0xFFFF;
-			}
-			else{
-				//single channel
-				val.raw.u64 = data->data.in[p];
-				val.normalised = (double) data->data.in[p] / 255.0;
-			}
-
-			if(mm_channel_event(chan, val)){
-				fprintf(stderr, "Failed to push ArtNet channel event to core\n");
-				return 1;
-			}
-		}
-	}
-	return 0;
-}
-
-static int artnet_handle(size_t num, managed_fd* fds){
-	size_t u, c;
-	uint64_t timestamp = mm_timestamp();
-	ssize_t bytes_read;
-	char recv_buf[ARTNET_RECV_BUF];
-	artnet_instance_id inst_id = {
-		.label = 0
-	};
-	instance* inst = NULL;
-	artnet_pkt* frame = (artnet_pkt*) recv_buf;
-
-	//transmit keepalive frames
-	for(u = 0; u < artnet_fds; u++){
-		for(c = 0; c < artnet_fd[u].output_instances; c++){
-			if(timestamp - artnet_fd[u].last_frame[c] >= ARTNET_KEEPALIVE_INTERVAL){
-				inst = mm_instance_find(BACKEND_NAME, artnet_fd[u].output_instance[c].label);
-				if(inst){
-					artnet_transmit(inst);
-				}
-			}
-		}
-	}
-
-	if(!num){
-		//early exit
-		return 0;
-	}
-
-	for(u = 0; u < num; u++){
-		do{
-			bytes_read = recv(fds[u].fd, recv_buf, sizeof(recv_buf), 0);
-			if(bytes_read > 0 && bytes_read > sizeof(artnet_hdr)){
-				if(!memcmp(frame->magic, "Art-Net\0", 8) && be16toh(frame->opcode) == OpDmx){
-					//find matching instance
-					inst_id.fields.fd_index = ((uint64_t) fds[u].impl) & 0xFF;
-					inst_id.fields.net = frame->net;
-					inst_id.fields.uni = frame->universe;
-					inst = mm_instance_find(BACKEND_NAME, inst_id.label);
-					if(inst && artnet_process_frame(inst, frame)){
-						fprintf(stderr, "Failed to process ArtNet frame\n");
-					}
-				}
-			}
-		} while(bytes_read > 0);
-
-		if(bytes_read < 0 && errno != EAGAIN){
-			fprintf(stderr, "ArtNet failed to receive data: %s\n", strerror(errno));
-		}
-
-		if(bytes_read == 0){
-			fprintf(stderr, "ArtNet listener closed\n");
-			return 1;
-		}
-	}
-
-	return 0;
-}
-
-static int artnet_start(){
-	size_t n, u, p;
-	int rv = 1;
-	instance** inst = NULL;
-	artnet_instance_data* data = NULL;
-	artnet_instance_id id = {
-		.label = 0
-	};
-
-	//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(!artnet_fds){
-		fprintf(stderr, "Failed to start ArtNet backend: no descriptors bound\n");
-		return 1;
-	}
-
-	for(u = 0; u < n; u++){
-		data = (artnet_instance_data*) inst[u]->impl;
-		//set instance identifier
-		id.fields.fd_index = data->fd_index;
-		id.fields.net = data->net;
-		id.fields.uni = data->uni;
-		inst[u]->ident = id.label;
-
-		//check for duplicates
-		for(p = 0; p < u; p++){
-			if(inst[u]->ident == inst[p]->ident){
-				fprintf(stderr, "Universe specified multiple times, use one instance: %s - %s\n", inst[u]->name, inst[p]->name);
-				goto bail;
-			}
-		}
-
-		//if enabled for output, add to keepalive tracking
-		if(data->dest_len){
-			artnet_fd[data->fd_index].output_instance = realloc(artnet_fd[data->fd_index].output_instance, (artnet_fd[data->fd_index].output_instances + 1) * sizeof(artnet_instance_id));
-			artnet_fd[data->fd_index].last_frame = realloc(artnet_fd[data->fd_index].last_frame, (artnet_fd[data->fd_index].output_instances + 1) * sizeof(uint64_t));
-
-			if(!artnet_fd[data->fd_index].output_instance || !artnet_fd[data->fd_index].last_frame){
-				fprintf(stderr, "Failed to allocate memory\n");
-				goto bail;
-			}
-			artnet_fd[data->fd_index].output_instance[artnet_fd[data->fd_index].output_instances] = id;
-			artnet_fd[data->fd_index].last_frame[artnet_fd[data->fd_index].output_instances] = 0;
-
-			artnet_fd[data->fd_index].output_instances++;
-		}
-	}
-
-	fprintf(stderr, "ArtNet backend registering %zu descriptors to core\n", artnet_fds);
-	for(u = 0; u < artnet_fds; u++){
-		if(mm_manage_fd(artnet_fd[u].fd, BACKEND_NAME, 1, (void*) u)){
-			goto bail;
-		}
-	}
-
-	rv = 0;
-bail:
-	free(inst);
-	return rv;
-}
-
-static int artnet_shutdown(){
-	size_t n, p;
-	instance** inst = NULL;
-	if(mm_backend_instances(BACKEND_NAME, &n, &inst)){
-		fprintf(stderr, "Failed to fetch instance list\n");
-		return 1;
-	}
-
-	for(p = 0; p < n; p++){
-		free(inst[p]->impl);
-	}
-	free(inst);
-
-	for(p = 0; p < artnet_fds; p++){
-		close(artnet_fd[p].fd);
-		free(artnet_fd[p].output_instance);
-		free(artnet_fd[p].last_frame);
-	}
-	free(artnet_fd);
-
-	fprintf(stderr, "ArtNet backend shut down\n");
-	return 0;
-}