lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Tue, 23 Oct 2007 23:03:24 +0400
From:	Alexey Kuznetsov <>
To:	Timo Ter?s <>
Cc:	Patrick McHardy <>,,
Subject: Re: [PATCH RESEND] ip_gre: sendto/recvfrom NBMA address


> When GRE tunnel is in NBMA mode, this patch allows an application to use
> a PF_PACKET socket to:
> - send a packet to specific NBMA address with sendto()
> - use recvfrom() to receive packet and check which NBMA address it came from
> This is required to implement properly NHRP over GRE tunnel.

Ack. This is good idea.

Frankly, I was sure ip_gre worked in this way all these years.
I do not remember any reasons why it was crippled.

The only dubious case is when next hop is set using routing tables.
But code in ipgre_tunnel_xmit() is ready to accept this situation,
it checks for zero destination address and fixes it when it is able to.

To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists