84 lines
2.5 KiB
C
84 lines
2.5 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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* 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 <signal.h>
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#include <memory.h>
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#include <string.h>
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#include <unistd.h>
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#include "common.h"
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static int mdns_pid = 0;
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void mdns_unregister(void) {
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if (mdns_pid)
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kill(mdns_pid, SIGTERM);
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mdns_pid = 0;
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}
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void mdns_register(void) {
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if (mdns_pid)
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die("attempted to register with mDNS twice");
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// XXX todo: native avahi support, if available at compile time
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if ((mdns_pid = fork()))
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return;
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char *mdns_apname = malloc(strlen(config.apname) + 14);
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char *p = mdns_apname;
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int i;
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for (i=0; i<6; i++) {
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sprintf(p, "%02X", config.hw_addr[i]);
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p += 2;
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}
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*p++ = '@';
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strcpy(p, config.apname);
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char mdns_port[6];
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sprintf(mdns_port, "%d", config.port);
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#define RECORD "tp=UDP", "sm=false", "ek=1", "et=0,1", "cn=0,1", "ch=2", \
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"ss=16", "sr=44100", "vn=3", "txtvers=1", \
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config.password ? "pw=true" : "pw=false"
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char *argv[] = {
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NULL, mdns_apname, "_raop._tcp", mdns_port, RECORD
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};
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argv[0] = "avahi-publish-service";
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execvp(argv[0], argv);
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argv[0] = "mDNSPublish";
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execvp(argv[0], argv);
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char *mac_argv[] = {"dns-sd", "-R", mdns_apname, "_raop._tcp", ".",
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mdns_port, RECORD};
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execvp(mac_argv[0], mac_argv);
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die("Could not establish mDNS advertisement!\n");
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}
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