ssdp.py 文件源码

def createUdpSocket(discoverFlags):
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
    sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, 31 if (discoverFlags & SSDP_DISCOVERF_USE_TTL_31) else 1)
    return sock

#
# prepares a UDP socket for multicast receives
#