linux-kernel - TCP ISN from userlevel

lists.openwall.net		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 linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date:	Thu, 7 Aug 2014 12:48:14 +0400
From:	Aleksey Midenkov <midenok@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: TCP ISN from userlevel

Expansion of Linux Kernel API for getting from userlevel TCP ISN by
socket descriptor. Would such improvement deserve merge? The use case
is to differ hosts behind NAT. The general plan of changes:

1. copy ISN into the tcp_sock structure when the TCP session is created;
2. add ioctl for getting ISN;
or
2.  copy that value into the tcp_info structure returned by getsockopt().

I see that 'snt_isn' and 'rcv_isn' are stored in 'tcp_request_sock'.
Is 'tcp_request_sock' have the lifetime of 'tcp_sock'? I.e. can it be
always accessed via 'fastopen_rsk'?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/