[GHC] #1940: GHCi triggers firewall by sending unexpected packet

[GHC]

#1940: GHCi triggers firewall by sending unexpected packet
------------------------+---------------------------------------------------
 Reporter:  TimAttwood  |          Owner:         
     Type:  bug         |         Status:  new    
 Priority:  normal      |      Milestone:  6.8.3  
Component:  GHCi        |        Version:  6.8.1  
 Severity:  trivial     |     Resolution:         
 Keywords:  firewall    |     Difficulty:  Unknown
 Testcase:              |   Architecture:  x86    
       Os:  Windows     |  
------------------------+---------------------------------------------------
Comment (by TimAttwood):

 It happens somewhat reliably, only when GHCi has yet to return (all) the
 calculating value, and not when it's idle at prompt. It doesn't seem to
 happen more than once per GHCi session, and allowing or denying the packet
 seems to have no effect on anything. It hasn't happened with any other
 programs.[[BR]]
 Here's another packet dump... these seem perty similar to me, they're only
 a couple bites different, that's probably just the process ID...
 {{{
 Parent Process :        E:\graphics\haskell\bin\ghci.exe
 Parent Version :
 Parent Description :
 Parent Process ID :     0x95C (Heximal) 2396 (Decimal)


 File Version :
 File Description :      E:\graphics\haskell\bin\ghc.exe
 File Path :             E:\graphics\haskell\bin\ghc.exe
 Process ID :            0xEC4 (Heximal) 3780 (Decimal)

 Connection origin :     local initiated
 Protocol :              Raw Ethernet
 Local Address :         0.0.0.0
 Local Port :            0
 Remote Name :
 Remote Address :        0.0.0.0
 Remote Port :           0

 Ethernet packet details:
 Ethernet II (Packet Length: 56)
         Destination:    ff-ff-ff-ff-ff-ff
         Source:         00-0d-87-7f-3c-6b
 Type: ARP (0x0806)
 Address Resolution Protocol (ARP)
         Hardware type: Ethernet (0x0001)
         Protocol type: IP (0x0800)
         Hardware size: 6
         Protocol size: 4
         Opcode: Request
         Sender hardware address: 00-0d-87-7f-3c-6b
         Sender IP address: 192.168.1.100
         Target hardware address: 00-00-00-00-00-00
         Target IP address: 192.168.1.1

 Binary dump of the packet:
 0000:  FF FF FF FF FF FF 00 0D : 87 7F 3C 6B 08 06 00 01 |
 ..........<k....
 0010:  08 00 06 04 00 01 00 0D : 87 7F 3C 6B C0 A8 01 64 |
 ..........<k...d
 0020:  00 00 00 00 00 00 C0 A8 : 01 01 60 02 AC 1E 50 10 |
 ..........`...P.
 0030:  FD 63 12 2D 00 00 50 4F :                         | .c.-..PO
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1940#comment:8>
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