diff options
Diffstat (limited to 'backends/sacn.c')
| -rw-r--r-- | backends/sacn.c | 736 |
1 files changed, 736 insertions, 0 deletions
diff --git a/backends/sacn.c b/backends/sacn.c new file mode 100644 index 0000000..9a3202d --- /dev/null +++ b/backends/sacn.c @@ -0,0 +1,736 @@ +#include <string.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <netdb.h> +#include <unistd.h> +#include <errno.h> +#include <fcntl.h> +#include <ctype.h> +#include <netinet/in.h> + +#include "sacn.h" +//upper limit imposed by using the fd index as 16-bit part of the instance id +#define MAX_FDS 4096 +#define BACKEND_NAME "sacn" + +static struct /*_sacn_global_config*/ { + uint8_t source_name[64]; + uint8_t cid[16]; + size_t fds; + sacn_fd* fd; + uint64_t last_announce; +} global_cfg = { + .source_name = "MIDIMonster", + .cid = {'M', 'I', 'D', 'I', 'M', 'o', 'n', 's', 't', 'e', 'r'}, + .fds = 0, + .fd = NULL, + .last_announce = 0 +}; + +int init(){ + backend sacn = { + .name = BACKEND_NAME, + .conf = sacn_configure, + .create = sacn_instance, + .conf_instance = sacn_configure_instance, + .channel = sacn_channel, + .handle = sacn_set, + .process = sacn_handle, + .start = sacn_start, + .shutdown = sacn_shutdown + }; + + //register the backend + if(mm_backend_register(sacn)){ + fprintf(stderr, "Failed to register sACN backend\n"); + return 1; + } + + return 0; +} + +static int sacn_listener(char* host, char* port, uint8_t fd_flags){ + 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(global_cfg.fds >= MAX_FDS){ + fprintf(stderr, "sACN 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 sACN descriptor nonblocking\n"); + return -1; + } + + //store fd + global_cfg.fd = realloc(global_cfg.fd, (global_cfg.fds + 1) * sizeof(sacn_fd)); + if(!global_cfg.fd){ + fprintf(stderr, "Failed to allocate memory\n"); + return -1; + } + + fprintf(stderr, "sACN backend interface %zu bound to %s port %s\n", global_cfg.fds, host, port); + global_cfg.fd[global_cfg.fds].fd = fd; + global_cfg.fd[global_cfg.fds].flags = fd_flags; + global_cfg.fd[global_cfg.fds].universes = 0; + global_cfg.fd[global_cfg.fds].universe = NULL; + global_cfg.fd[global_cfg.fds].last_frame = NULL; + global_cfg.fds++; + return 0; +} + +static int sacn_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 sacn_parse_hostspec(char* in, char** host, char** port, uint8_t* flags){ + 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 = SACN_PORT; + } + + if(flags){ + //TODO parse hostspec trailing data for options + *flags = 0; + } + return 0; +} + +static int sacn_configure(char* option, char* value){ + char* host = NULL, *port = NULL, *next = NULL; + uint8_t flags = 0; + size_t u; + + if(!strcmp(option, "name")){ + if(strlen(value) > 63){ + fprintf(stderr, "Invalid sACN source name %s, limit is 63 characters\n", value); + return 1; + } + + memset(global_cfg.source_name, 0, sizeof(global_cfg.source_name)); + memcpy(global_cfg.source_name, value, strlen(value)); + return 0; + } + else if(!strcmp(option, "cid")){ + next = value; + for(u = 0; u < sizeof(global_cfg.cid); u++){ + global_cfg.cid[u] = (strtoul(next, &next, 0) & 0xFF); + } + } + else if(!strcmp(option, "bind")){ + if(sacn_parse_hostspec(value, &host, &port, &flags)){ + fprintf(stderr, "Not a valid sACN bind address: %s\n", value); + return 1; + } + + if(sacn_listener(host, port, flags)){ + fprintf(stderr, "Failed to bind sACN descriptor: %s\n", value); + return 1; + } + return 0; + } + + fprintf(stderr, "Unknown sACN backend option %s\n", option); + return 1; +} + +static int sacn_configure_instance(instance* inst, char* option, char* value){ + sacn_instance_data* data = (sacn_instance_data*) inst->impl; + char* host = NULL, *port = NULL, *next = NULL; + size_t u; + + if(!strcmp(option, "universe")){ + data->uni = strtoul(value, NULL, 10); + return 0; + } + else if(!strcmp(option, "interface")){ + data->fd_index = strtoul(value, NULL, 10); + + if(data->fd_index >= global_cfg.fds){ + fprintf(stderr, "Configured sACN interface index is out of range on instance %s\n", inst->name); + return 1; + } + return 0; + } + else if(!strcmp(option, "priority")){ + data->xmit_prio = strtoul(value, NULL, 10); + return 0; + } + else if(!strcmp(option, "destination")){ + if(sacn_parse_hostspec(value, &host, &port, NULL)){ + fprintf(stderr, "Not a valid sACN destination for instance %s: %s\n", inst->name, value); + return 1; + } + + return sacn_parse_addr(host, port, &data->dest_addr, &data->dest_len); + } + else if(!strcmp(option, "from")){ + next = value; + data->filter_enabled = 1; + for(u = 0; u < sizeof(data->cid_filter); u++){ + data->cid_filter[u] = (strtoul(next, &next, 0) & 0xFF); + } + fprintf(stderr, "Enabled source CID filter for instance %s\n", inst->name); + return 0; + } + else if(!strcmp(option, "unicast")){ + data->unicast_input = strtoul(value, NULL, 10); + } + + fprintf(stderr, "Unknown configuration option %s for sACN backend\n", option); + return 1; +} + +static instance* sacn_instance(){ + instance* inst = mm_instance(); + if(!inst){ + return NULL; + } + + inst->impl = calloc(1, sizeof(sacn_instance_data)); + if(!inst->impl){ + fprintf(stderr, "Failed to allocate memory"); + return NULL; + } + + return inst; +} + +static channel* sacn_channel(instance* inst, char* spec){ + sacn_instance_data* data = (sacn_instance_data*) inst->impl; + char* spec_next = spec; + + unsigned chan_a = strtoul(spec, &spec_next, 10), chan_b = 0; + + //range check + if(!chan_a || chan_a > 512){ + fprintf(stderr, "sACN channel out of range on instance %s: %s\n", inst->name, spec); + return NULL; + } + chan_a--; + + //if wide channel, mark fine + if(*spec_next == '+'){ + chan_b = strtoul(spec_next + 1, NULL, 10); + if(!chan_b || chan_b > 512){ + fprintf(stderr, "Invalid wide-channel spec on instance %s: %s\n", inst->name, spec); + return NULL; + } + chan_b--; + + //if already mapped, bail + if(IS_ACTIVE(data->data.map[chan_b]) && data->data.map[chan_b] != (MAP_FINE | chan_a)){ + fprintf(stderr, "Fine channel %u already mapped on instance %s\n", chan_b, inst->name); + return NULL; + } + + data->data.map[chan_b] = MAP_FINE | chan_a; + } + + //if already active, assert that nothing changes + 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 sACN channel %u already mapped in another mode on instance %s\n", chan_a, inst->name); + 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 sacn_transmit(instance* inst){ + size_t u; + sacn_instance_data* data = (sacn_instance_data*) inst->impl; + sacn_data_pdu pdu = { + .root = { + .preamble_size = htobe16(0x10), + .postamble_size = 0, + .magic = { 0 }, //memcpy'd + .flags = htobe16(0x7000 | 0x026e), + .vector = htobe32(ROOT_E131_DATA), + .sender_cid = { 0 }, //memcpy'd + .frame_flags = htobe16(0x7000 | 0x0258), + .frame_vector = htobe32(FRAME_E131_DATA) + }, + .data = { + .source_name = "", //memcpy'd + .priority = data->xmit_prio, + .sync_addr = 0, + .sequence = data->data.last_seq++, + .options = 0, + .universe = htobe16(data->uni), + .flags = htobe16(0x7000 | 0x0205), + .vector = DMP_SET_PROPERTY, + .format = 0xA1, + .startcode_offset = 0, + .address_increment = htobe16(1), + .channels = htobe16(513), + .data = { 0 } //memcpy'd + } + }; + + memcpy(pdu.root.magic, SACN_PDU_MAGIC, sizeof(pdu.root.magic)); + memcpy(pdu.root.sender_cid, global_cfg.cid, sizeof(pdu.root.sender_cid)); + memcpy(pdu.data.source_name, global_cfg.source_name, sizeof(pdu.data.source_name)); + memcpy((((uint8_t*)pdu.data.data) + 1), data->data.out, 512); + + if(sendto(global_cfg.fd[data->fd_index].fd, &pdu, sizeof(pdu), 0, (struct sockaddr*) &data->dest_addr, data->dest_len) < 0){ + fprintf(stderr, "Failed to output sACN frame for instance %s: %s\n", inst->name, strerror(errno)); + } + + //update last transmit timestamp + for(u = 0; u < global_cfg.fd[data->fd_index].universes; u++){ + if(global_cfg.fd[data->fd_index].universe[u] == data->uni){ + global_cfg.fd[data->fd_index].last_frame[u] = mm_timestamp(); + } + } + return 0; +} + +static int sacn_set(instance* inst, size_t num, channel** c, channel_value* v){ + size_t u, mark = 0; + sacn_instance_data* data = (sacn_instance_data*) inst->impl; + + if(!num){ + return 0; + } + + if(!data->xmit_prio){ + fprintf(stderr, "sACN instance %s not enabled for output (%zu channel events)\n", inst->name, num); + return 0; + } + + for(u = 0; u < num; u++){ + if(IS_WIDE(data->data.map[c[u]->ident])){ + uint32_t val = v[u].normalised * ((double) 0xFFFF); + + 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; + } + } + + //send packet if required + if(mark){ + sacn_transmit(inst); + } + + return 0; +} + +static int sacn_process_frame(instance* inst, sacn_frame_root* frame, sacn_frame_data* data){ + size_t u, max_mark = 0; + channel* chan = NULL; + channel_value val; + sacn_instance_data* inst_data = (sacn_instance_data*) inst->impl; + + //source filtering + if(inst_data->filter_enabled && memcmp(inst_data->cid_filter, frame->sender_cid, 16)){ + return 0; + } + + if(data->format != 0xa1 + || data->startcode_offset + || be16toh(data->address_increment) != 1){ + fprintf(stderr, "sACN framing not supported\n"); + return 1; + } + + if(be16toh(data->channels) > 513){ + fprintf(stderr, "Invalid sACN frame channel count\n"); + return 1; + } + + //handle source priority (currently a 1-bit counter) + if(inst_data->data.last_priority > data->priority){ + inst_data->data.last_priority = data->priority; + return 0; + } + inst_data->data.last_priority = data->priority; + + //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]) + && data->data[u] != inst_data->data.in[u - 1]){ + inst_data->data.in[u - 1] = data->data[u]; + inst_data->data.map[u - 1] |= MAP_MARK; + max_mark = u - 1; + } + } + + //generate events + for(u = 0; u <= max_mark; u++){ + if(inst_data->data.map[u] & MAP_MARK){ + //unmark and get channel + inst_data->data.map[u] &= ~MAP_MARK; + if(inst_data->data.map[u] & MAP_FINE){ + chan = mm_channel(inst, MAPPED_CHANNEL(inst_data->data.map[u]), 0); + } + else{ + chan = mm_channel(inst, u, 0); + } + + if(!chan){ + fprintf(stderr, "Active channel %zu on %s not known to core", u, inst->name); + return 1; + } + + //generate value + if(IS_WIDE(inst_data->data.map[u])){ + inst_data->data.map[MAPPED_CHANNEL(inst_data->data.map[u])] &= ~MAP_MARK; + val.raw.u64 = inst_data->data.in[u] << ((inst_data->data.map[u] & MAP_COARSE) ? 8 : 0); + val.raw.u64 |= inst_data->data.in[MAPPED_CHANNEL(inst_data->data.map[u])] << ((inst_data->data.map[u] & MAP_COARSE) ? 0 : 8); + val.normalised = (double) val.raw.u64 / (double) 0xFFFF; + } + else{ + val.raw.u64 = inst_data->data.in[u]; + val.normalised = (double) val.raw.u64 / 255.0; + } + + if(mm_channel_event(chan, val)){ + fprintf(stderr, "Failed to push sACN channel event to core\n"); + return 1; + } + } + } + return 0; +} + +static void sacn_discovery(size_t fd){ + size_t page = 0, pages = (global_cfg.fd[fd].universes / 512) + 1, universes; + struct sockaddr_in discovery_dest = { + .sin_family = AF_INET, + .sin_port = htobe16(SACN_PORT), + .sin_addr.s_addr = htobe32(((uint32_t) 0xefff0000) | 64214) + }; + + sacn_discovery_pdu pdu = { + .root = { + .preamble_size = htobe16(0x10), + .postamble_size = 0, + .magic = { 0 }, //memcpy'd + .flags = 0, //filled later + .vector = htobe32(ROOT_E131_EXTENDED), + .sender_cid = { 0 }, //memcpy'd + .frame_flags = 0, //filled later + .frame_vector = htobe32(FRAME_E131_DISCOVERY) + }, + .data = { + .source_name = "", //memcpy'd + .flags = 0, //filled later + .vector = htobe32(DISCOVERY_UNIVERSE_LIST), + .page = 0, //filled later + .max_page = pages - 1, + .data = { 0 } //memcpy'd + } + }; + + memcpy(pdu.root.magic, SACN_PDU_MAGIC, sizeof(pdu.root.magic)); + memcpy(pdu.root.sender_cid, global_cfg.cid, sizeof(pdu.root.sender_cid)); + memcpy(pdu.data.source_name, global_cfg.source_name, sizeof(pdu.data.source_name)); + + for(; page < pages; page++){ + universes = (global_cfg.fd[fd].universes - page * 512 >= 512) ? 512 : (global_cfg.fd[fd].universes % 512); + pdu.root.flags = htobe16(0x7000 | (104 + universes * sizeof(uint16_t))); + pdu.root.frame_flags = htobe16(0x7000 | (82 + universes * sizeof(uint16_t))); + pdu.data.flags = htobe16(0x7000 | (8 + universes * sizeof(uint16_t))); + + pdu.data.page = page; + memcpy(pdu.data.data, global_cfg.fd[fd].universe + page * 512, universes * sizeof(uint16_t)); + + if(sendto(global_cfg.fd[fd].fd, &pdu, sizeof(pdu) - (512 - universes) * sizeof(uint16_t), 0, (struct sockaddr*) &discovery_dest, sizeof(discovery_dest)) < 0){ + fprintf(stderr, "Failed to output sACN universe discovery frame for interface %zu: %s\n", fd, strerror(errno)); + } + } +} + +static int sacn_handle(size_t num, managed_fd* fds){ + size_t u, c; + uint64_t timestamp = mm_timestamp(); + ssize_t bytes_read; + char recv_buf[SACN_RECV_BUF]; + instance* inst = NULL; + sacn_instance_id instance_id = { + .label = 0 + }; + sacn_frame_root* frame = (sacn_frame_root*) recv_buf; + sacn_frame_data* data = (sacn_frame_data*) (recv_buf + sizeof(sacn_frame_root)); + + if(mm_timestamp() - global_cfg.last_announce > SACN_DISCOVERY_TIMEOUT){ + //send universe discovery pdu + for(u = 0; u < global_cfg.fds; u++){ + if(global_cfg.fd[u].universes){ + sacn_discovery(u); + } + } + global_cfg.last_announce = timestamp; + } + + //check for keepalive frames + for(u = 0; u < global_cfg.fds; u++){ + for(c = 0; c < global_cfg.fd[u].universes; c++){ + if(timestamp - global_cfg.fd[u].last_frame[c] >= SACN_KEEPALIVE_INTERVAL){ + instance_id.fields.fd_index = u; + instance_id.fields.uni = global_cfg.fd[u].universe[c]; + inst = mm_instance_find(BACKEND_NAME, instance_id.label); + if(inst){ + sacn_transmit(inst); + } + } + } + } + + //early exit + if(!num){ + 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(sacn_frame_root)){ + if(!memcmp(frame->magic, SACN_PDU_MAGIC, 12) + && be16toh(frame->preamble_size) == 0x10 + && frame->postamble_size == 0 + && be32toh(frame->vector) == ROOT_E131_DATA + && be32toh(frame->frame_vector) == FRAME_E131_DATA + && data->vector == DMP_SET_PROPERTY){ + instance_id.fields.fd_index = ((uint64_t) fds[u].impl) & 0xFFFF; + instance_id.fields.uni = be16toh(data->universe); + inst = mm_instance_find(BACKEND_NAME, instance_id.label); + if(inst && sacn_process_frame(inst, frame, data)){ + fprintf(stderr, "Failed to process sACN frame\n"); + } + } + } + } while(bytes_read > 0); + + if(bytes_read < 0 && errno != EAGAIN){ + fprintf(stderr, "sACN failed to receive data: %s\n", strerror(errno)); + } + + if(bytes_read == 0){ + fprintf(stderr, "sACN listener closed\n"); + return 1; + } + } + + return 0; +} + +static int sacn_start(){ + size_t n, u, p; + int rv = 1; + instance** inst = NULL; + sacn_instance_data* data = NULL; + sacn_instance_id id = { + .label = 0 + }; + struct ip_mreq mcast_req = { + .imr_interface = { INADDR_ANY } + }; + struct sockaddr_in* dest_v4 = NULL; + + //fetch all 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(!global_cfg.fds){ + fprintf(stderr, "Failed to start sACN backend: no descriptors bound\n"); + return 1; + } + + //update instance identifiers, join multicast groups + for(u = 0; u < n; u++){ + data = (sacn_instance_data*) inst[u]->impl; + id.fields.fd_index = data->fd_index; + id.fields.uni = data->uni; + inst[u]->ident = id.label; + + if(!data->uni){ + fprintf(stderr, "Please specify a universe on instance %s\n", inst[u]->name); + goto bail; + } + + //find duplicates + for(p = 0; p < u; p++){ + if(inst[u]->ident == inst[p]->ident){ + fprintf(stderr, "Colliding sACN instances, use one: %s - %s\n", inst[u]->name, inst[p]->name); + goto bail; + } + } + + 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, &mcast_req, sizeof(mcast_req))){ + fprintf(stderr, "Failed to join Multicast group for sACN universe %u on instance %s: %s\n", data->uni, inst[u]->name, strerror(errno)); + } + } + + if(data->xmit_prio){ + //add to list of advertised universes for this fd + global_cfg.fd[data->fd_index].universe = realloc(global_cfg.fd[data->fd_index].universe, (global_cfg.fd[data->fd_index].universes + 1) * sizeof(uint16_t)); + if(!global_cfg.fd[data->fd_index].universe){ + fprintf(stderr, "Failed to allocate memory\n"); + goto bail; + } + + global_cfg.fd[data->fd_index].universe[global_cfg.fd[data->fd_index].universes] = data->uni; + global_cfg.fd[data->fd_index].universes++; + + //generate multicast destination address if none set + if(!data->dest_len){ + data->dest_len = sizeof(struct sockaddr_in); + 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; + } + } + } + + fprintf(stderr, "sACN backend registering %zu descriptors to core\n", global_cfg.fds); + for(u = 0; u < global_cfg.fds; u++){ + //allocate memory for storing last frame transmission timestamp + global_cfg.fd[u].last_frame = calloc(global_cfg.fd[u].universes, sizeof(uint64_t)); + if(!global_cfg.fd[u].last_frame){ + fprintf(stderr, "Failed to allocate memory\n"); + goto bail; + } + if(mm_manage_fd(global_cfg.fd[u].fd, BACKEND_NAME, 1, (void*) u)){ + goto bail; + } + } + + rv = 0; +bail: + free(inst); + return rv; +} + +static int sacn_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 < global_cfg.fds; p++){ + close(global_cfg.fd[p].fd); + free(global_cfg.fd[p].universe); + free(global_cfg.fd[p].last_frame); + } + free(global_cfg.fd); + fprintf(stderr, "sACN backend shut down\n"); + return 0; +} |