diff options
Diffstat (limited to 'SDL_Core/src/components/transport_manager/src/tcp/dnssd_service_browser.cc')
| -rw-r--r-- | SDL_Core/src/components/transport_manager/src/tcp/dnssd_service_browser.cc | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/SDL_Core/src/components/transport_manager/src/tcp/dnssd_service_browser.cc b/SDL_Core/src/components/transport_manager/src/tcp/dnssd_service_browser.cc new file mode 100644 index 000000000..799348cfb --- /dev/null +++ b/SDL_Core/src/components/transport_manager/src/tcp/dnssd_service_browser.cc @@ -0,0 +1,326 @@ +/** + * \file dnssd_service_browser.cc + * \brief DnssdServiceBrowser class source file. + * + * Copyright (c) 2013, Ford Motor Company + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following + * disclaimer in the documentation and/or other materials provided with the + * distribution. + * + * Neither the name of the Ford Motor Company nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <algorithm> +#include <map> + +#include "transport_manager/transport_adapter/transport_adapter_impl.h" +#include "transport_manager/tcp/tcp_device.h" +#include "transport_manager/tcp/dnssd_service_browser.h" + +namespace transport_manager { + +namespace transport_adapter { + +bool operator==(const DnssdServiceRecord& a, const DnssdServiceRecord& b) { + return a.name == b.name && a.type == b.type && a.interface == b.interface + && a.protocol == b.protocol && a.domain_name == b.domain_name; +} + +void DnssdServiceBrowser::Terminate() { + if (0 != avahi_threaded_poll_) + avahi_threaded_poll_stop(avahi_threaded_poll_); + if (0 != avahi_service_browser_) + avahi_service_browser_free(avahi_service_browser_); + if (0 != avahi_client_) + avahi_client_free(avahi_client_); + if (0 != avahi_threaded_poll_) + avahi_threaded_poll_free(avahi_threaded_poll_); +} + +bool DnssdServiceBrowser::IsInitialised() const { + return initialised_; +} + +DnssdServiceBrowser::DnssdServiceBrowser(TransportAdapterController* controller) + : controller_(controller), + avahi_service_browser_(0), + avahi_threaded_poll_(0), + avahi_client_(0), + service_records_(), + mutex_(), + initialised_(false) { + pthread_mutex_init(&mutex_, 0); +} + +DnssdServiceBrowser::~DnssdServiceBrowser() { + pthread_mutex_destroy(&mutex_); +} + +void DnssdServiceBrowser::OnClientConnected() { + initialised_ = true; + LOG4CXX_ERROR(logger_, "AvahiClient ready"); +} + +void DnssdServiceBrowser::OnClientFailure() { + const int avahi_errno = avahi_client_errno(avahi_client_); + if (avahi_errno == AVAHI_ERR_DISCONNECTED) { + LOG4CXX_INFO(logger_, "AvahiClient disconnected"); + CreateAvahiClientAndBrowser(); + } else { + LOG4CXX_ERROR(logger_, + "AvahiClient failure: " << avahi_strerror(avahi_errno)); + } +} + +void AvahiClientCallback(AvahiClient *avahi_client, + AvahiClientState avahi_client_state, void* data) { + DnssdServiceBrowser* dnssd_service_browser = + static_cast<DnssdServiceBrowser*>(data); + + switch (avahi_client_state) { + case AVAHI_CLIENT_S_RUNNING: + dnssd_service_browser->OnClientConnected(); + break; + case AVAHI_CLIENT_FAILURE: + dnssd_service_browser->OnClientFailure(); + break; + } +} + +void AvahiServiceBrowserCallback(AvahiServiceBrowser *avahi_service_browser, + AvahiIfIndex interface, AvahiProtocol protocol, + AvahiBrowserEvent event, const char *name, + const char *type, const char *domain, + AvahiLookupResultFlags flags, void* data) { + DnssdServiceBrowser* dnssd_service_browser = + static_cast<DnssdServiceBrowser*>(data); + + int avahi_errno; + switch (event) { + case AVAHI_BROWSER_FAILURE: + avahi_errno = avahi_client_errno( + avahi_service_browser_get_client(avahi_service_browser)); + LOG4CXX_ERROR( + logger_, + "AvahiServiceBrowser failure: " << avahi_strerror(avahi_errno)); + break; + + case AVAHI_BROWSER_NEW: + dnssd_service_browser->AddService(interface, protocol, name, type, + domain); + break; + + case AVAHI_BROWSER_REMOVE: + dnssd_service_browser->RemoveService(interface, protocol, name, type, + domain); + break; + + case AVAHI_BROWSER_ALL_FOR_NOW: + case AVAHI_BROWSER_CACHE_EXHAUSTED: + break; + } +} + +void DnssdServiceBrowser::ServiceResolved( + const DnssdServiceRecord& service_record) { + pthread_mutex_lock(&mutex_); + ServiceRecords::iterator service_record_it = std::find( + service_records_.begin(), service_records_.end(), service_record); + if (service_record_it != service_records_.end()) { + *service_record_it = service_record; + } + DeviceVector device_vector = PrepareDeviceVector(); + controller_->SearchDeviceDone(device_vector); + pthread_mutex_unlock(&mutex_); +} + +void DnssdServiceBrowser::ServiceResolveFailed( + const DnssdServiceRecord& service_record) { + LOG4CXX_ERROR(logger_, + "AvahiServiceResolver failure for: " << service_record.name); + pthread_mutex_lock(&mutex_); + ServiceRecords::iterator service_record_it = std::find( + service_records_.begin(), service_records_.end(), service_record); + if (service_record_it != service_records_.end()) { + service_records_.erase(service_record_it); + } + pthread_mutex_unlock(&mutex_); +} + +void AvahiServiceResolverCallback(AvahiServiceResolver* avahi_service_resolver, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiResolverEvent event, const char* name, + const char* type, const char* domain, + const char* host_name, + const AvahiAddress* avahi_address, + uint16_t port, AvahiStringList* txt, + AvahiLookupResultFlags flags, void *data) { + DnssdServiceBrowser* dnssd_service_browser = + static_cast<DnssdServiceBrowser*>(data); + + DnssdServiceRecord service_record; + service_record.interface = interface; + service_record.protocol = protocol; + service_record.domain_name = domain; + service_record.host_name = host_name; + service_record.name = name; + service_record.type = type; + switch (event) { + case AVAHI_RESOLVER_FOUND: + service_record.addr = avahi_address->data.ipv4.address; + service_record.port = port; + dnssd_service_browser->ServiceResolved(service_record); + break; + case AVAHI_RESOLVER_FAILURE: + dnssd_service_browser->ServiceResolveFailed(service_record); + break; + } + + avahi_service_resolver_free(avahi_service_resolver); +} + +TransportAdapter::Error DnssdServiceBrowser::CreateAvahiClientAndBrowser() { + if (0 != avahi_service_browser_) + avahi_service_browser_free(avahi_service_browser_); + if (0 != avahi_client_) + avahi_client_free(avahi_client_); + + int avahi_error; + avahi_client_ = avahi_client_new( + avahi_threaded_poll_get(avahi_threaded_poll_), AVAHI_CLIENT_NO_FAIL, + AvahiClientCallback, this, &avahi_error); + if (0 == avahi_client_) { + LOG4CXX_ERROR( + logger_, + "Failed to create AvahiClient: " << avahi_strerror(avahi_error)); + return TransportAdapter::FAIL; + } + + pthread_mutex_lock(&mutex_); + service_records_.clear(); + pthread_mutex_unlock(&mutex_); + + avahi_service_browser_ = avahi_service_browser_new( + avahi_client_, AVAHI_IF_UNSPEC, /* TODO use only required iface */ + AVAHI_PROTO_INET, DNSSD_DEFAULT_SERVICE_TYPE, NULL, /* use default domain */ + static_cast<AvahiLookupFlags>(0), AvahiServiceBrowserCallback, this); + + return TransportAdapter::OK; +} + +TransportAdapter::Error DnssdServiceBrowser::Init() { + avahi_threaded_poll_ = avahi_threaded_poll_new(); + if (0 == avahi_threaded_poll_) { + LOG4CXX_ERROR(logger_, "Failed to create AvahiThreadedPoll"); + return TransportAdapter::FAIL; + } + + const TransportAdapter::Error err = CreateAvahiClientAndBrowser(); + if (err != TransportAdapter::OK) { + return err; + } + + const int poll_start_status = avahi_threaded_poll_start(avahi_threaded_poll_); + if (poll_start_status != 0) { + LOG4CXX_ERROR(logger_, "Failed to start AvahiThreadedPoll"); + return TransportAdapter::FAIL; + } + + return TransportAdapter::OK; +} + +TransportAdapter::Error DnssdServiceBrowser::Scan() { + return TransportAdapter::NOT_SUPPORTED; +} + +void DnssdServiceBrowser::AddService(AvahiIfIndex interface, + AvahiProtocol protocol, const char* name, + const char* type, const char* domain) { + DnssdServiceRecord record; + record.interface = interface; + record.protocol = protocol; + record.domain_name = domain; + record.name = name; + record.type = type; + + pthread_mutex_lock(&mutex_); + if (service_records_.end() + == std::find(service_records_.begin(), service_records_.end(), record)) { + service_records_.push_back(record); + AvahiServiceResolver* avahi_service_resolver = avahi_service_resolver_new( + avahi_client_, interface, protocol, name, type, domain, + AVAHI_PROTO_INET, static_cast<AvahiLookupFlags>(0), + AvahiServiceResolverCallback, this); + } + pthread_mutex_unlock(&mutex_); +} + +void DnssdServiceBrowser::RemoveService(AvahiIfIndex interface, + AvahiProtocol protocol, + const char* name, const char* type, + const char* domain) { + DnssdServiceRecord record; + record.interface = interface; + record.protocol = protocol; + record.name = name; + record.type = type; + record.domain_name = domain; + + pthread_mutex_lock(&mutex_); + service_records_.erase( + std::remove(service_records_.begin(), service_records_.end(), record), + service_records_.end()); + pthread_mutex_unlock(&mutex_); +} + +DeviceVector DnssdServiceBrowser::PrepareDeviceVector() const { + std::map<uint32_t, TcpDevice*> devices; + for (ServiceRecords::const_iterator it = service_records_.begin(); + it != service_records_.end(); ++it) { + const DnssdServiceRecord& service_record = *it; + if (service_record.host_name.empty()) continue; + if (devices[service_record.addr] == 0) { + devices[service_record.addr] = new TcpDevice(service_record.addr, + service_record.host_name); + } + if (devices[service_record.addr] != 0) { + devices[service_record.addr]->AddDiscoveredApplication( + service_record.port); + } + } + DeviceVector device_vector; + device_vector.reserve(devices.size()); + for (std::map<uint32_t, TcpDevice*>::const_iterator it = devices.begin(); + it != devices.end(); ++it) { + device_vector.push_back(DeviceSptr(it->second)); + } + return device_vector; +} + +} // namespace +} // namespace + |