diff options
Diffstat (limited to 'artnet.c')
| -rw-r--r-- | artnet.c | 562 |
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; -} |