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Wireshark 和 tshark 非常适合嗅探消息，但是用代码来做这件事会惨遭失败。

Wireshark 转储 mcast

如果找到最相似的问题是如何接收多播数据包？但是胎面是陈旧的。

我认为这不是udp 转换，因此我尝试了许多片段（主要是 python）并且失败了。使用此链接，我认为我应该“加入” 224.0.0.0。我还得出结论，没有端口的概念。

我看了一眼scrapy没有明显的成功。

所以我基本上是在寻找可以完成这项工作的表单 python/c 片段。

此代码确实（在此处形成How do you UDP multicast in Python?）不起作用（总是发布一些代码很好）

import socket
import struct

MCAST_GRP = '224.0.0.0'
MCAST_PORT = 5007
IS_ALL_GROUPS = True

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
if IS_ALL_GROUPS:
    # on this port, receives ALL multicast groups
    sock.bind(('', MCAST_PORT))
else:
    # on this port, listen ONLY to MCAST_GRP
    sock.bind((MCAST_GRP, MCAST_PORT))
mreq = struct.pack("4sl", socket.inet_aton(MCAST_GRP), socket.INADDR_ANY)

sock.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)

while True:
# For Python 3, change next line to "print(sock.recv(10240))"
print sock.recv(10240)

使用似乎是一个明智的方向的原始套接字也无济于事。如https://stackoverflow.com/a/24416136/2679998

import socket
import struct
import binascii

rawSocket = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(0x0003))

while True:

    packet = rawSocket.recvfrom(2048)

    ethernet_header = packet[0][0:14]
    ethernet_detailed = struct.unpack("!6s6s2s", ethernet_header)

    arp_header = packet[0][14:42]
    arp_detailed = struct.unpack("2s2s1s1s2s6s4s6s4s", arp_header)

    # skip non-ARP packets
    ethertype = ethernet_detailed[2]
    #if ethertype != '\x08\x06':
    #    continue

    print "****************_ETHERNET_FRAME_****************"
    print "Dest MAC:        ", binascii.hexlify(ethernet_detailed[0])
    print "Source MAC:      ", binascii.hexlify(ethernet_detailed[1])
    print "Type:            ", binascii.hexlify(ethertype)
    print "************************************************"
    print "******************_ARP_HEADER_******************"
    print "Hardware type:   ", binascii.hexlify(arp_detailed[0])
    print "Protocol type:   ", binascii.hexlify(arp_detailed[1])
    print "Hardware size:   ", binascii.hexlify(arp_detailed[2])
    print "Protocol size:   ", binascii.hexlify(arp_detailed[3])
    print "Opcode:          ", binascii.hexlify(arp_detailed[4])
    print "Source MAC:      ", binascii.hexlify(arp_detailed[5])
    print "Source IP:       ", socket.inet_ntoa(arp_detailed[6])
    print "Dest MAC:        ", binascii.hexlify(arp_detailed[7])
    print "Dest IP:         ", socket.inet_ntoa(arp_detailed[8])
    print "*************************************************\n"
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