static SocketStatus_t attemptConnection()

in platform/posix/transport/src/sockets_posix.c [219:279]
47 lines of code
5 McCabe index (conditional complexity)

static SocketStatus_t attemptConnection( struct addrinfo * pListHead,
                                         const char * pHostName,
                                         size_t hostNameLength,
                                         uint16_t port,
                                         int32_t * pTcpSocket )
{
    SocketStatus_t returnStatus = SOCKETS_CONNECT_FAILURE;
    const struct addrinfo * pIndex = NULL;

    assert( pListHead != NULL );
    assert( pHostName != NULL );
    assert( hostNameLength > 0 );
    assert( pTcpSocket != NULL );

    /* Unused parameters when logging is disabled. */
    ( void ) pHostName;
    ( void ) hostNameLength;

    LogDebug( ( "Attempting to connect to: Host=%.*s.",
                ( int32_t ) hostNameLength,
                pHostName ) );

    /* Attempt to connect to one of the retrieved DNS records. */
    for( pIndex = pListHead; pIndex != NULL; pIndex = pIndex->ai_next )
    {
        *pTcpSocket = socket( pIndex->ai_family,
                              pIndex->ai_socktype,
                              pIndex->ai_protocol );

        if( *pTcpSocket == -1 )
        {
            continue;
        }

        /* Attempt to connect to a resolved DNS address of the host. */
        returnStatus = connectToAddress( pIndex->ai_addr, port, *pTcpSocket );

        /* If connected to an IP address successfully, exit from the loop. */
        if( returnStatus == SOCKETS_SUCCESS )
        {
            break;
        }
    }

    if( returnStatus == SOCKETS_SUCCESS )
    {
        LogDebug( ( "Established TCP connection: Server=%.*s.\n",
                    ( int32_t ) hostNameLength,
                    pHostName ) );
    }
    else
    {
        LogError( ( "Could not connect to any resolved IP address from %.*s.",
                    ( int32_t ) hostNameLength,
                    pHostName ) );
    }

    freeaddrinfo( pListHead );

    return returnStatus;
}