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syscall: AF_INET/SOCK_PACKET interface doesn't work on Linux #7653

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gopherbot opened this issue Mar 27, 2014 · 4 comments
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syscall: AF_INET/SOCK_PACKET interface doesn't work on Linux #7653

gopherbot opened this issue Mar 27, 2014 · 4 comments
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@gopherbot
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by xiezhenye:

The "from" return value of syscall.Recvfrom on a raw socket should not be
SockaddrUnix

What steps reproduce the problem?
sock, _ =  syscall.Socket(syscall.AF_INET, syscall.SOCK_PACKET,
int(htons(syscall.ETH_P_ARP)))
_, from, err := syscall.Recvfrom(sock, buf, 0)

The type of from is SockaddrUnix so that the "from" returned can not used to
syscall.Sendto
@gopherbot
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Comment 1 by xiezhenye:

use SockaddrUnix to syscall.Sendto caused the arg passed to sendto syscall is
AF_FILE，and got a return -1 EINVAL (Invalid argument)

@gopherbot
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Comment 2 by xiezhenye:

use SockaddrUnix to syscall.Sendto caused the arg passed to sendto syscall is
AF_FILE，and got a return -1 EINVAL (Invalid argument)

@mikioh
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mikioh commented Mar 28, 2014

Comment 3:

Your code doesn't compile, there's no htons/ntohs-like stuff in Go standard library.
Also your code looks wrong. The obsoleted Linux's AF_INET/SOCK_PACKET access interface
requires struct sockaddr in C, syscall.RawSockaddr in Go. But syscall.Bind requires a
struct that implements syscall.Sockaddr interface for its argument. So, trying to make
AF_INET/SOCK_PACKET socket work in Go is waste of time. Instead, you can use address
family AF_PACKET socket (see attached for the detail), or LSF, PF_RING, other.

Status changed to Invalid.

Attachments:

  1. afpacket.go (885 bytes)

@gopherbot
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Comment 4 by xiezhenye:

Thank you. that solves my problem.

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