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/*
*Copyright (C) <2017> Alex B
*
*This program is free software: you can redistribute it and/or modify
*it under the terms of the GNU General Public License as published by
*the Free Software Foundation, either version 2 of the License, or
*(at your option) any later version.
*
*This program is distributed in the hope that it will be useful,
*but WITHOUT ANY WARRANTY; without even the implied warranty of
*MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
*GNU General Public License for more details.
*
*You should have received a copy of the GNU General Public License
*along with this program. If not, see <http://www.gnu.org/licenses/>
*/
#include "avahidiscovery.h"
#include <avahi-common/error.h>
const AvahiPoll* getAvahiPoll(void);
#include <QDebug>
static bool debugIsEnabled = false;
#define DBUG \
if (debugIsEnabled) qWarning() << "Avahi" << __FUNCTION__
void AvahiDiscovery::enableDebug()
{
debugIsEnabled = true;
}
static AvahiDiscovery* ptr = nullptr;
static void resolverCallback(
AvahiServiceResolver* r,
AVAHI_GCC_UNUSED AvahiIfIndex interface,
AVAHI_GCC_UNUSED AvahiProtocol protocol,
AvahiResolverEvent event,
const char* name,
AVAHI_GCC_UNUSED const char* type,
AVAHI_GCC_UNUSED const char* domain,
AVAHI_GCC_UNUSED const char* hostName,
const AvahiAddress* address,
uint16_t port,
AVAHI_GCC_UNUSED AvahiStringList* txt,
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
void* userdata)
{
char a[AVAHI_ADDRESS_STR_MAX];
switch (event) {
case AVAHI_RESOLVER_FAILURE:
//avahi resolver not found
break;
case AVAHI_RESOLVER_FOUND:
avahi_address_snprint(a, sizeof(a), address);
break;
}
int eventType = *(static_cast<int*>(userdata));
switch (eventType) {
case AVAHI_BROWSER_NEW:
emit ptr->mpdFound(name, a, port);
break;
case AVAHI_BROWSER_REMOVE:
emit ptr->mpdRemoved(name);
break;
}
avahi_service_resolver_free(r);
free(userdata);
}
static void browseCallback(
AvahiServiceBrowser* b,
AvahiIfIndex interface,
AvahiProtocol protocol,
AvahiBrowserEvent event,
const char* name,
const char* type,
const char* domain,
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
AVAHI_GCC_UNUSED void* userdata)
{
switch (event) {
case AVAHI_BROWSER_FAILURE:
DBUG << "(Browser) " << avahi_strerror(avahi_client_errno(avahi_service_browser_get_client(b)));
break;
case AVAHI_BROWSER_NEW:
if (!(avahi_service_resolver_new(avahi_service_browser_get_client(b), interface, protocol, name, type, domain, AVAHI_PROTO_UNSPEC, AVAHI_LOOKUP_USE_MULTICAST, resolverCallback, new int(AVAHI_BROWSER_NEW)))) {
DBUG << "Failed to resolve service " << name;
}
break;
case AVAHI_BROWSER_REMOVE:
if (!(avahi_service_resolver_new(avahi_service_browser_get_client(b), interface, protocol, name, type, domain, AVAHI_PROTO_UNSPEC, AVAHI_LOOKUP_USE_MULTICAST, resolverCallback, new int(AVAHI_BROWSER_REMOVE)))) {
DBUG << "Failed to resolve service " << name;
}
break;
case AVAHI_BROWSER_ALL_FOR_NOW:
DBUG << "Service browser: ALL_FOR_NOW";
break;
case AVAHI_BROWSER_CACHE_EXHAUSTED:
DBUG << "Service browser: CACHE_EXHAUSTED";
break;
}
}
static void clientCallback(AvahiClient* c, AvahiClientState state, AVAHI_GCC_UNUSED void* userdata)
{
assert(c);
if (AVAHI_CLIENT_FAILURE == state) {
DBUG << "Server connection failure: " << avahi_strerror(avahi_client_errno(c));
}
}
AvahiDiscovery::AvahiDiscovery()
{
ptr = this;
/* create avahi client */
int error;
m_client = avahi_client_new(getAvahiPoll(), AVAHI_CLIENT_IGNORE_USER_CONFIG, clientCallback, nullptr, &error);
if (!m_client) {
DBUG << "Failed to create client: " << avahi_strerror(error);
return;
}
/* create avahi browser */
m_browser = avahi_service_browser_new(m_client, AVAHI_IF_UNSPEC, AVAHI_PROTO_INET, "_mpd._tcp", nullptr, AVAHI_LOOKUP_USE_MULTICAST, browseCallback, m_client);
if (!m_browser) {
DBUG << "Failed to create service browser: " << avahi_strerror(avahi_client_errno(m_client));
return;
}
}
AvahiDiscovery::~AvahiDiscovery()
{
if (m_browser) {
avahi_service_browser_free(m_browser);
}
if (m_client) {
avahi_client_free(m_client);
}
}
#include "moc_avahidiscovery.cpp"
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