154 lines
4.5 KiB
C
154 lines
4.5 KiB
C
/*
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* mDNS registration handler. This file is part of Shairport.
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* Copyright (c) James Laird 2013
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* Modifications, updates and additions (c) Mike Brady 2014 -- 2020
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "mdns.h"
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#include "common.h"
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#include "config.h"
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#include <memory.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef CONFIG_AVAHI
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extern mdns_backend mdns_avahi;
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#endif
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#ifdef CONFIG_DNS_SD
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extern mdns_backend mdns_dns_sd;
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#endif
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#ifdef CONFIG_TINYSVCMDNS
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extern mdns_backend mdns_tinysvcmdns;
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#endif
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#ifdef CONFIG_EXTERNAL_MDNS
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extern mdns_backend mdns_external_avahi;
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extern mdns_backend mdns_external_dns_sd;
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#endif
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static mdns_backend *mdns_backends[] = {
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#ifdef CONFIG_AVAHI
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&mdns_avahi,
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#endif
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#ifdef CONFIG_DNS_SD
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&mdns_dns_sd,
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#endif
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#ifdef CONFIG_TINYSVCMDNS
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&mdns_tinysvcmdns,
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#endif
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#ifdef CONFIG_EXTERNAL_MDNS
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&mdns_external_avahi,
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&mdns_external_dns_sd,
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#endif
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NULL};
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void mdns_register(char **txt_records, char **secondary_txt_records) {
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char *ap1_service_name = alloca(strlen(config.service_name) + 14);
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char *p = ap1_service_name;
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int i;
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for (i = 0; i < 6; i++) {
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snprintf(p, 3, "%02X", config.ap1_prefix[i]);
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p += 2;
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}
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*p++ = '@';
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strcpy(p, config.service_name);
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mdns_backend **b = NULL;
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if (config.mdns_name != NULL) {
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for (b = mdns_backends; *b; b++) {
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if (strcmp((*b)->name, config.mdns_name) != 0) // Not the one we are looking for
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continue;
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int error = (*b)->mdns_register(ap1_service_name, config.service_name, config.port,
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txt_records, secondary_txt_records);
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if (error >= 0) {
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config.mdns = *b;
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}
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break;
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}
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if (*b == NULL)
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warn("%s mDNS backend not found");
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} else {
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// default -- pick the first back end
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for (b = mdns_backends; *b; b++) {
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int error = (*b)->mdns_register(ap1_service_name, config.service_name, config.port,
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txt_records, secondary_txt_records);
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if (error >= 0) {
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config.mdns = *b;
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break;
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}
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}
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}
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if (config.mdns == NULL)
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die("Could not establish mDNS advertisement!");
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mdns_dacp_monitor_start(); // create a dacp monitor thread
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}
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void mdns_update(char **txt_records, char **secondary_txt_records) {
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if ((config.mdns) && (config.mdns->mdns_update)) {
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config.mdns->mdns_update(txt_records, secondary_txt_records);
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} else
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debug(1, "Can't mdns_update -- no mdns_update registered.");
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}
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void mdns_unregister(void) {
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mdns_dacp_monitor_stop();
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if (config.mdns) {
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config.mdns->mdns_unregister();
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}
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}
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void mdns_dacp_monitor_start(void) {
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if ((config.mdns) && (config.mdns->mdns_dacp_monitor_start)) {
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config.mdns->mdns_dacp_monitor_start();
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} else
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debug(3, "Can't start a DACP monitor -- no mdns_dacp_monitor start registered.");
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}
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void mdns_dacp_monitor_stop() {
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if ((config.mdns) && (config.mdns->mdns_dacp_monitor_stop)) {
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config.mdns->mdns_dacp_monitor_stop();
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} else
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debug(3, "Can't stop a DACP monitor -- no mdns_dacp_monitor_stop registered.");
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}
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void mdns_dacp_monitor_set_id(const char *dacp_id) {
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if ((config.mdns) && (config.mdns->mdns_dacp_monitor_set_id)) {
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config.mdns->mdns_dacp_monitor_set_id(dacp_id);
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} else
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debug(3, "Can't set dacp_id -- no mdns_dacp_set_id registered.");
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}
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void mdns_ls_backends(void) {
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mdns_backend **b = NULL;
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printf("Available mDNS backends: \n");
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for (b = mdns_backends; *b; b++) {
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printf(" %s\n", (*b)->name);
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}
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}
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