Backport Bonjour support from trunk

Thanks to Qball, pat, and jat :)

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r6477 | jat | 2007-06-04 19:41:18 +0200 (Mo, 04 Jun 2007) | 4 lines

Don't initialize zeroconf until after we've daemonized and log output has
been redirected.  This prevents zeroconf from blocking daemonization, and
makes sure any errors get sent to the logs and not stdout.
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r6474 | jat | 2007-06-03 22:09:12 +0200 (So, 03 Jun 2007) | 3 lines

Adding ChangeLog entry for zeroconf_enabled, adding Zeroconf section to
mpdconf.example, and updating the zeroconf_* docs.
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r6471 | jat | 2007-06-03 21:44:19 +0200 (So, 03 Jun 2007) | 4 lines

Define HAVE_ZEROCONF if Avahi or Bonjour support is enabled, so that we can
silence a warning about an unused variable without using stupid checks for
HAVE_AVAHI || HAVE_BONJOUR.
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r6467 | pat | 2007-06-03 20:08:51 +0200 (So, 03 Jun 2007) | 2 lines

allow zeroconf to be disabled.
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r6464 | jat | 2007-06-03 02:03:20 +0200 (So, 03 Jun 2007) | 2 lines

Cleaning up zeroconf configure magic.
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r6463 | jat | 2007-06-03 00:58:51 +0200 (So, 03 Jun 2007) | 2 lines

Check if we need -ldns_sd for Bonjour.
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r6462 | jat | 2007-06-03 00:52:53 +0200 (So, 03 Jun 2007) | 2 lines

Adding a missing include.
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r6453 | pat | 2007-06-02 19:06:08 +0200 (Sa, 02 Jun 2007) | 3 lines

Added Bonjour zeroconf support. This works now natively on
MacOS X.  I couldn't test mDNSResponder support on Linux, as
Debian doesn't include it - but should work as well.

git-svn-id: https://svn.musicpd.org/mpd/branches/branch-0.13.0-fixes@7381 09075e82-0dd4-0310-85a5-a0d7c8717e4f

1 files changed, 118 insertions, 10 deletions

diff --git a/src/zeroconf.c b/src/zeroconf.c
index 0b0163218..6ded363bf 100644
--- a/src/zeroconf.c
+++ b/src/zeroconf.c
@@ -19,6 +19,7 @@
 #include <stdlib.h>
 #include <assert.h>
 #include <string.h>
+#include <arpa/inet.h>
 
 #include "zeroconf.h"
 #include "conf.h"
@@ -35,6 +36,17 @@
  */
 #define SERVICE_NAME		"Music Player"
 
+#ifdef HAVE_ZEROCONF
+static struct ioOps zeroConfIo = {
+};
+#endif
+
+#ifdef HAVE_BONJOUR
+#include <dns_sd.h>
+
+static DNSServiceRef dnsReference;
+#endif
+
 /* Here is the implementation for Avahi (http://avahi.org) Zeroconf support */
 #ifdef HAVE_AVAHI
 
@@ -55,10 +67,6 @@ static int avahiRunning;
 
 static int avahiFdset( fd_set* rfds, fd_set* wfds, fd_set* efds );
 static int avahiFdconsume( int fdCount, fd_set* rfds, fd_set* wfds, fd_set* efds );
-static struct ioOps avahiIo = {
-	.fdset = avahiFdset,
-	.consume = avahiFdconsume,
-};
 
 /* Forward Declaration */
 static void avahiRegisterService(AvahiClient *c);
@@ -453,36 +461,127 @@ static void init_avahi(const char *serviceName)
 		goto fail;
 	}
 
-	avahiIo.fdset = avahiFdset;
-	avahiIo.consume = avahiFdconsume;
-	registerIO( &avahiIo );
+	zeroConfIo.fdset = avahiFdset;
+	zeroConfIo.consume = avahiFdconsume;
+	registerIO( &zeroConfIo );
 
 	return;
 
 fail:
 	finishZeroconf();
 }
-#else  /* !HAVE_AVAHI */
-static void init_avahi(const char *serviceName) { }
 #endif /* HAVE_AVAHI */
 
+#ifdef HAVE_BONJOUR
+static int dnsRegisterFdset(fd_set* rfds, fd_set* wfds, fd_set* efds)
+{
+	int fd;
+
+	if (dnsReference == NULL)
+		return -1;
+
+	fd = DNSServiceRefSockFD(dnsReference);
+	if (fd == -1)
+		return -1;
+
+	FD_SET(fd, rfds);
+
+	return fd;
+}
+
+static int dnsRegisterFdconsume(int fdCount, fd_set* rfds, fd_set* wfds,
+                                fd_set* efds)
+{
+	int fd;
+
+	if (dnsReference == NULL)
+		return -1;
+
+	fd = DNSServiceRefSockFD(dnsReference);
+	if (fd == -1)
+		return -1;
+
+	if (FD_ISSET(fd, rfds)) {
+		FD_CLR(fd, rfds);
+
+		DNSServiceProcessResult(dnsReference);
+
+		return fdCount - 1;
+	}
+
+	return fdCount;
+}
+
+static void dnsRegisterCallback (DNSServiceRef sdRef, DNSServiceFlags flags,
+				    DNSServiceErrorType errorCode, const char *name,
+					const char *regtype, const char *domain, void *context)
+{
+	if (errorCode != kDNSServiceErr_NoError) {
+		ERROR("Failed to register zeroconf service.\n");
+
+		DNSServiceRefDeallocate(dnsReference);
+		dnsReference = NULL;
+		deregisterIO( &zeroConfIo );
+	} else {
+		DEBUG("Registered zeroconf service with name '%s'\n", name);
+	}
+}
+
+static void init_zeroconf_osx(const char *serviceName)
+{
+	DNSServiceErrorType error = DNSServiceRegister(&dnsReference,
+			0, 0, serviceName, SERVICE_TYPE, NULL, NULL, htons(getBoundPort()), 0,
+			NULL, dnsRegisterCallback, NULL);
+
+	if (error != kDNSServiceErr_NoError) {
+		ERROR("Failed to register zeroconf service.\n");
+
+		if (dnsReference) {
+			DNSServiceRefDeallocate(dnsReference);
+			dnsReference = NULL;
+		}
+		return;
+	}
+
+	zeroConfIo.fdset = dnsRegisterFdset;
+	zeroConfIo.consume = dnsRegisterFdconsume;
+	registerIO( &zeroConfIo );
+}
+#endif
+
 void initZeroconf(void)
 {
 	const char* serviceName = SERVICE_NAME;
 	ConfigParam *param;
+	int enabled = getBoolConfigParam(CONF_ZEROCONF_ENABLED);
+
+	if (enabled != -1 && enabled != 1)
+		return;
 
 	param = getConfigParam(CONF_ZEROCONF_NAME);
 
 	if (param && strlen(param->value) > 0)
 		serviceName = param->value;
+
+#ifdef HAVE_AVAHI
 	init_avahi(serviceName);
+#endif
+
+#ifdef HAVE_BONJOUR
+	init_zeroconf_osx(serviceName);
+#endif
 }
 
 void finishZeroconf(void)
 {
+	int enabled = getBoolConfigParam(CONF_ZEROCONF_ENABLED);
+
+	if (enabled != -1 && enabled != 1)
+		return;
+
 #ifdef HAVE_AVAHI
 	DEBUG( "Avahi: Shutting down interface\n" );
-	deregisterIO( &avahiIo );
+	deregisterIO( &zeroConfIo );
 
 	if( avahiGroup ) {
 		avahi_entry_group_free( avahiGroup );
@@ -497,4 +596,13 @@ void finishZeroconf(void)
 	avahi_free( avahiName );
 	avahiName = NULL;
 #endif /* HAVE_AVAHI */
+
+#ifdef HAVE_BONJOUR
+	deregisterIO( &zeroConfIo );
+	if (dnsReference != NULL) {
+		DNSServiceRefDeallocate(dnsReference);
+		dnsReference = NULL;
+		DEBUG("Deregistered Zeroconf service.\n");
+	}
+#endif
 }