#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>
#include <thread>
#include <fcntl.h>
#include "HciSocket.h"
#include "Logger.h"
#include "Utils.h"
namespace ggk {
HciSocket::HciSocket()
: fdSocket(-1)
{
}
HciSocket::~HciSocket()
{
disconnect();
}
bool HciSocket::connect()
{
disconnect();
fdSocket = socket(PF_BLUETOOTH, SOCK_RAW | SOCK_CLOEXEC | SOCK_NONBLOCK, BTPROTO_HCI);
if (fdSocket < 0)
{
logErrno("Connect(socket)");
return false;
}
struct sockaddr_hci addr;
memset(&addr, 0, sizeof(addr));
addr.hci_family = AF_BLUETOOTH;
addr.hci_dev = HCI_DEV_NONE;
addr.hci_channel = HCI_CHANNEL_CONTROL;
if (bind(fdSocket, reinterpret_cast<struct sockaddr *>(&addr), sizeof(addr)) < 0)
{
logErrno("Connect(bind)");
disconnect();
return false;
}
Logger::debug(SSTR << "Connected to HCI control socket (fd = " << fdSocket << ")");
return true;
}
bool HciSocket::isConnected() const
{
return fdSocket >= 0;
}
void HciSocket::disconnect()
{
if (isConnected())
{
Logger::debug("HciSocket disconnecting");
if (close(fdSocket) != 0)
{
logErrno("close(fdSocket)");
}
fdSocket = -1;
Logger::trace("HciSocket closed");
}
}
bool HciSocket::read(std::vector<uint8_t> &response) const
{
response.resize(kResponseMaxSize, 0);
if (!waitForDataOrShutdown())
{
return false;
}
ssize_t bytesRead = ::recv(fdSocket, &response[0], kResponseMaxSize, MSG_WAITALL);
if (bytesRead < 0)
{
if (errno == EINTR)
{
Logger::debug("HciSocket receive interrupted");
}
else
{
logErrno("recv");
}
response.resize(0);
return false;
}
else if (bytesRead == 0)
{
Logger::error("Peer closed the socket");
response.resize(0);
return false;
}
response.resize(bytesRead);
std::string dump = "";
dump += " > Read " + std::to_string(response.size()) + " bytes\n";
dump += Utils::hex(response.data(), response.size());
Logger::debug(dump);
return true;
}
bool HciSocket::write(std::vector<uint8_t> buffer) const
{
return write(buffer.data(), buffer.size());
}
bool HciSocket::write(const uint8_t *pBuffer, size_t count) const
{
std::string dump = "";
dump += " > Writing " + std::to_string(count) + " bytes\n";
dump += Utils::hex(pBuffer, count);
Logger::debug(dump);
size_t len = ::write(fdSocket, pBuffer, count);
if (len != count)
{
logErrno("write");
return false;
}
return true;
}
bool HciSocket::waitForDataOrShutdown() const
{
while(ggkIsServerRunning())
{
fd_set rfds;
FD_ZERO(&rfds);
FD_SET(fdSocket, &rfds);
struct timeval tv;
tv.tv_sec = 0;
tv.tv_usec = kDataWaitTimeMS * 1000;
int retval = select(fdSocket+1, &rfds, NULL, NULL, &tv);
if (retval > 0) { return true; }
if (retval < 0) { return false; }
continue;
}
return false;
}
void HciSocket::logErrno(const char *pOperation) const
{
std::string errorDetail(strerror(errno));
if (errno == EAGAIN)
{
errorDetail += " or not enough permission for this operation";
}
Logger::error(SSTR << "Error on Bluetooth management socket during " << pOperation << " operation. Error code " << errno << ": " << errorDetail);
}
};