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net: conn generated by ListenMulticastUDP returns other multicast group messages on the same port #8164

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gopherbot opened this issue Jun 7, 2014 · 1 comment
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net: conn generated by ListenMulticastUDP returns other multicast group messages on the same port #8164

gopherbot opened this issue Jun 7, 2014 · 1 comment
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@gopherbot
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by ufmufm:

go version go1.2.1 linux/amd64

http://play.golang.org/p/Cp4rO78CWs

1. start program.
2. send udp packet to address 239.103.3.14:5004 via nc, for example: nc -u 239.103.3.14
5004
123

got this message on screen:

239.103.3.15 got 123
239.103.3.14 got 123

should be only:
239.103.3.14 got 123
@mikioh
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mikioh commented Jun 7, 2014

Comment 1:

Simply ListenMulticastUDP exists for convenience, for simple single-homed applications.
You need to use go.net/ipv4 or go.net/ipv6 for more control.
https://godoc.org/code.google.com/p/go.net/ipv4 
https://godoc.org/code.google.com/p/go.net/ipv6

Status changed to Duplicate.

Merged into issue #3820.

@golang golang locked and limited conversation to collaborators Jun 25, 2016
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@mikioh @gopherbot