SOCKET_TRANSPORT_HANDLE socket_transport_create_from_socket()

in win32/src/socket_transport_win32.c [244:294]

• 44 lines of code
• 5 McCabe index (conditional complexity)

SOCKET_TRANSPORT_HANDLE socket_transport_create_from_socket(SOCKET_HANDLE socket_handle)
{
    SOCKET_TRANSPORT* result;
    // Codes_SOCKET_TRANSPORT_WIN32_09_096: [ If socket_handle is an INVALID_SOCKET, socket_transport_create_from_socket shall fail and return NULL. ]
    if ((SOCKET)socket_handle == INVALID_SOCKET)
    {
        LogError("Invalid socket, unable to create socket_transport_handle.");
    }
    else
    {
        // Codes_SOCKET_TRANSPORT_WIN32_09_097: [ socket_transport_create_from_socket shall allocate a new SOCKET_TRANSPORT object. ]
        result = malloc(sizeof(SOCKET_TRANSPORT));
        if (result == NULL)
        {
            LogError("failure allocating SOCKET_TRANSPORT: %zu", sizeof(SOCKET_TRANSPORT));
        }
        else
        {
            // Codes_SOCKET_TRANSPORT_WIN32_09_098: [ socket_transport_create_from_socket shall call sm_create to create a sm_object with the type set to SOCKET_CLIENT. ]
            result->sm = sm_create("Socket_transport_win32");
            if (result->sm == NULL)
            {
                LogError("sm_create failed.");
            }
            else
            {
                // Codes_SOCKET_TRANSPORT_WIN32_09_014: [ If sm_open_begin does not return SM_EXEC_GRANTED, socket_transport_create_from_socket shall fail and return NULL. ]
                SM_RESULT open_result = sm_open_begin(result->sm);
                if (open_result == SM_EXEC_GRANTED)
                {
                    result->type = SOCKET_CLIENT;
                    // Codes_SOCKET_TRANSPORT_WIN32_09_099: [ socket_transport_create_from_socket shall assign the socket_handle to the new allocated socket transport. ]
                    result->socket = (SOCKET)socket_handle;
                    sm_open_end(result->sm, true);
                    // Codes_SOCKET_TRANSPORT_WIN32_09_101: [ On success socket_transport_create_from_socket shall return SOCKET_TRANSPORT_HANDLE. ]
                    goto all_ok;
                }
                else
                {
                    LogError("sm_open_begin failed with %" PRI_MU_ENUM " in accept, closing incoming socket.", MU_ENUM_VALUE(SM_RESULT, open_result));
                }
                sm_destroy(result->sm);
            }
            free(result);
        }
    }
    // Codes_SOCKET_TRANSPORT_WIN32_09_100: [ On any failure socket_transport_create_from_socket shall return NULL. ]
    result = NULL;
all_ok:
    return result;
}