Add UDP broadcast socket.

This commit is contained in:
Bartosz Taudul 2019-06-17 02:24:55 +02:00
parent 5db6cc4eee
commit 40e517594b
2 changed files with 98 additions and 0 deletions

View File

@ -345,4 +345,82 @@ void ListenSocket::Close()
m_sock = -1;
}
UdpBroadcast::UdpBroadcast()
: m_sock( -1 )
{
#ifdef _WIN32
InitWinSock();
#endif
}
UdpBroadcast::~UdpBroadcast()
{
if( m_sock != -1 ) Close();
}
bool UdpBroadcast::Open( const char* addr, const char* port )
{
assert( m_sock == -1 );
struct addrinfo hints;
struct addrinfo *res, *ptr;
memset( &hints, 0, sizeof( hints ) );
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_DGRAM;
if( getaddrinfo( addr, port, &hints, &res ) != 0 ) return false;
int sock = 0;
for( ptr = res; ptr; ptr = ptr->ai_next )
{
if( ( sock = socket( ptr->ai_family, ptr->ai_socktype, ptr->ai_protocol ) ) == -1 ) continue;
#if defined __APPLE__
int val = 1;
setsockopt( sock, SOL_SOCKET, SO_NOSIGPIPE, &val, sizeof( val ) );
#endif
#if defined _WIN32 || defined __CYGWIN__
unsigned long broadcast = 1;
if( setsockopt( sock, SOL_SOCKET, SO_BROADCAST, (const char*)&broadcast, sizeof( broadcast ) ) == -1 )
#else
int broadcast = 1;
if( setsockopt( sock, SOL_SOCKET, SO_BROADCAST, &broadcast, sizeof( broadcast ) ) == -1 )
#endif
{
#ifdef _WIN32
closesocket( sock );
#else
close( sock );
#endif
continue;
}
break;
}
freeaddrinfo( res );
if( !ptr ) return false;
m_sock = sock;
return true;
}
void UdpBroadcast::Close()
{
assert( m_sock != -1 );
#ifdef _WIN32
closesocket( m_sock );
#else
close( m_sock );
#endif
m_sock = -1;
}
int UdpBroadcast::Send( const void* data, int len )
{
assert( m_sock != -1 );
struct sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_port = htons( 8087 );
addr.sin_addr.s_addr = INADDR_BROADCAST;
return sendto( m_sock, (const char*)data, len, MSG_NOSIGNAL, (sockaddr*)&addr, sizeof( addr ) );
}
}

View File

@ -63,6 +63,26 @@ private:
int m_sock;
};
class UdpBroadcast
{
public:
UdpBroadcast();
~UdpBroadcast();
bool Open( const char* addr, const char* port );
void Close();
int Send( const void* data, int len );
UdpBroadcast( const UdpBroadcast& ) = delete;
UdpBroadcast( UdpBroadcast&& ) = delete;
UdpBroadcast& operator=( const UdpBroadcast& ) = delete;
UdpBroadcast& operator=( UdpBroadcast&& ) = delete;
private:
int m_sock;
};
}
#endif