Network.Socket中提供了原始套接字类型,但是在绑定(bind)套接字附近有一个注释“当前仅支持Unix域套接字和Internet系列”。如何在Haskell中使用原始套接字?

作为工作的Python代码,我试图实现的目标是:

import binascii
import socket

# Create raw socket.
ethType = b'FFFF' # 2 bytes, has to be >= 0x0600. FFFF is "unavailable" by IEEE.
sock = socket.socket(socket.AF_PACKET, socket.SOCK_RAW)
sock.bind( ('lo', int(ethType,16)) )

# Create packet.
srcMac  = b'000000000000' # 6 bytes
destMac = b'000000000000' # 6 bytes
header = binascii.a2b_hex( destMac + srcMac + ethType ) # 14 bytes
message = b'Hello, World!'
sock.send(header + message)

# Receive such packets
while True: print (sock.recv(65535))

编辑1:
在Haskell中,我使用sock <- socket AF_PACKET Raw 0xFFFF创建套接字,但是bindSocket需要SockAddr作为参数,为此,可用的构造函数是
SockAddrInet PortNumber HostAddress
SockAddrInet6 PortNumber FlowInfo HostAddress6 ScopeID
SockAddrUnix String

但是这些似乎都不对。

编辑2:
感谢Yuras的评论,我收到了可以工作的数据包:
import Network.Socket
sock <- socket AF_PACKET Raw 0xFFFF
recv sock 0xFFFF

编辑3:
尝试从套接字发送数据包而不绑定(bind)它会导致异常:
sock <- socket AF_PACKET Raw 0xFFFF
send sock "\NUL\NUL\NUL\NUL\NUL\NUL\NUL\NUL\NUL\NUL\NUL\NUL\255\255"
*** Exception: send: does not exist (No such device or address)

这是有道理的,因为内核对于实际传输数据包的接口(interface)没有任何线索。有什么方法可以将(原始)套接字绑定(bind)到Haskell中的接口(interface)?

最佳答案

Network.Pcap可用于发送和接收原始数据。

import qualified Data.ByteString.Char8 as B
import Network.Pcap

main = do
    -- open device
    dev <- openLive "lo" 65535 False 0
    setFilter dev "ether proto 0xFFFF" True 0

    -- send
    sendPacketBS dev (B.pack "\NUL\NUL\NUL\NUL\NUL\NUL\NUL\NUL\NUL\NUL\NUL\NUL\255\255Hello, World!")

    -- receive
    loopBS dev (-1) (\_ packet -> putStrLn (show packet))

10-07 19:16
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