- Jun 18, 2006
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James Morris authored
Add a secmark field to the skbuff structure, to allow security subsystems to place security markings on network packets. This is similar to the nfmark field, except is intended for implementing security policy, rather than than networking policy. This patch was already acked in principle by Dave Miller. Signed-off-by:
James Morris <jmorris@namei.org> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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James Morris authored
Add and export new functions to the in-kernel SELinux API in support of the new secmark-based packet controls. Signed-off-by:
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James Morris authored
Secmark implements a new scheme for adding security markings to packets via iptables, as well as changes to SELinux to use these markings for security policy enforcement. The rationale for this scheme is explained and discussed in detail in the original threads: http://thread.gmane.org/gmane.linux.network/34927/ http://thread.gmane.org/gmane.linux.network/35244/ Examples of policy and rulesets, as well as a full archive of patches for iptables and SELinux userland, may be found at: http://people.redhat.com/jmorris/selinux/secmark/ The code has been tested with various compilation options and in several scenarios, including with 'complicated' protocols such as FTP and also with the new generic conntrack code with IPv6 connection tracking. This patch: Add support for a new object class ('packet'), and associated permissions ('send', 'recv', 'relabelto'). These are used to enforce security policy for network packets labeled with SECMARK, and for adding labeling rules. Signed-off-by:
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Christopher J. PeBenito authored
Add a security class for appletalk sockets so that they can be distinguished in SELinux policy. Please apply. Signed-off-by:
Stephen Smalley <sds@tycho.nsa.gov> Acked-by:
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David S. Miller authored
Assignment used as truth value in xfrm_del_sa() and xfrm_get_policy(). Wrong argument type declared for security_xfrm_state_delete() when SELINUX is disabled. Signed-off-by: -
Dave Jones authored
Just spotted this typo in a new option. Signed-off-by:
Dave Jones <davej@redhat.com> Signed-off-by:
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Catherine Zhang authored
This patch contains a fix for the previous patch that adds security contexts to IPsec policies and security associations. In the previous patch, no authorization (besides the check for write permissions to SAD and SPD) is required to delete IPsec policies and security assocations with security contexts. Thus a user authorized to change SAD and SPD can bypass the IPsec policy authorization by simply deleteing policies with security contexts. To fix this security hole, an additional authorization check is added for removing security policies and security associations with security contexts. Note that if no security context is supplied on add or present on policy to be deleted, the SELinux module allows the change unconditionally. The hook is called on deletion when no context is present, which we may want to change. At present, I left it up to the module. LSM changes: The patch adds two new LSM hooks: xfrm_policy_delete and xfrm_state_delete. The new hooks are necessary to authorize deletion of IPsec policies that have security contexts. The existing hooks xfrm_policy_free and xfrm_state_free lack the context to do the authorization, so I decided to split authorization of deletion and memory management of security data, as is typical in the LSM interface. Use: The new delete hooks are checked when xfrm_policy or xfrm_state are deleted by either the xfrm_user interface (xfrm_get_policy, xfrm_del_sa) or the pfkey interface (pfkey_spddelete, pfkey_delete). SELinux changes: The new policy_delete and state_delete functions are added. Signed-off-by:
Catherine Zhang <cxzhang@watson.ibm.com> Signed-off-by:
Trent Jaeger <tjaeger@cse.psu.edu> Acked-by:
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Andreas Schwab authored
cn_queue.c:130: warning: value computed is not used There is no point in testing the atomic value if the result is thrown away. From Evgeniy: It was created to put implicit smp barrier, but it is not needed there. Signed-off-by:
Andreas Schwab <schwab@suse.de> Signed-off-by:
Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by:
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David S. Miller authored
It is typed wrong, and it's only assigned and used once. So just pass in iph->daddr directly which fixes both problems. Based upon a patch by Alexey Dobriyan. Signed-off-by: -
Alexey Dobriyan authored
All users pass 32-bit values as addresses and internally they're compared with 32-bit entities. So, change "laddr" and "raddr" types to __be32. Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
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Alexey Dobriyan authored
All users except two expect 32-bit big-endian value. One is of ->multiaddr = ->multiaddr variety. And last one is "%08lX". Signed-off-by:
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David S. Miller authored
The suseconds_t et al. are not necessarily any particular type on every platform, so cast to unsigned long so that we can use one printf format string and avoid warnings across the board Signed-off-by: -
Stephen Hemminger authored
Implementation of RFC3742 limited slow start. Added as part of the TCP highspeed congestion control module. Signed-off-by:
Stephen Hemminger <shemminger@osdl.org> Signed-off-by:
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Stephen Hemminger authored
This adds a new module for tracking TCP state variables non-intrusively using kprobes. It has a simple /proc interface that outputs one line for each packet received. A sample usage is to collect congestion window and ssthresh over time graphs. Signed-off-by:
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Stephen Hemminger authored
Many of the TCP congestion methods all just use ssthresh as the minimum congestion window on decrease. Rather than duplicating the code, just have that be the default if that handle in the ops structure is not set. Minor behaviour change to TCP compound. It probably wants to use this (ssthresh) as lower bound, rather than ssthresh/2 because the latter causes undershoot on loss. Signed-off-by:
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Stephen Hemminger authored
The original code did a 64 bit divide directly, which won't work on 32 bit platforms. Rather than doing a 64 bit square root twice, just implement a 4th root function in one pass using Newton's method. Signed-off-by:
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Angelo P. Castellani authored
TCP Compound is a sender-side only change to TCP that uses a mixed Reno/Vegas approach to calculate the cwnd. For further details look here: ftp://ftp.research.microsoft.com/pub/tr/TR-2005-86.pdf Signed-off-by:
Angelo P. Castellani <angelo.castellani@gmail.com> Signed-off-by:
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Bin Zhou authored
TCP Veno module is a new congestion control module to improve TCP performance over wireless networks. The key innovation in TCP Veno is the enhancement of TCP Reno/Sack congestion control algorithm by using the estimated state of a connection based on TCP Vegas. This scheme significantly reduces "blind" reduction of TCP window regardless of the cause of packet loss. This work is based on the research paper "TCP Veno: TCP Enhancement for Transmission over Wireless Access Networks." C. P. Fu, S. C. Liew, IEEE Journal on Selected Areas in Communication, Feb. 2003. Original paper and many latest research works on veno: http://www.ntu.edu.sg/home/ascpfu/veno/veno.html Signed-off-by:
Bin Zhou <zhou0022@ntu.edu.sg> Cheng Peng Fu <ascpfu@ntu.edu.sg> Signed-off-by:
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Wong Hoi Sing Edison authored
TCP Low Priority is a distributed algorithm whose goal is to utilize only the excess network bandwidth as compared to the ``fair share`` of bandwidth as targeted by TCP. Available from: http://www.ece.rice.edu/~akuzma/Doc/akuzma/TCP-LP.pdf Original Author: Aleksandar Kuzmanovic <akuzma@northwestern.edu> See http://www-ece.rice.edu/networks/TCP-LP/ for their implementation. As of 2.6.13, Linux supports pluggable congestion control algorithms. Due to the limitation of the API, we take the following changes from the original TCP-LP implementation: o We use newReno in most core CA handling. Only add some checking within cong_avoid. o Error correcting in remote HZ, therefore remote HZ will be keeped on checking and updating. o Handling calculation of One-Way-Delay (OWD) within rtt_sample, sicne OWD have a similar meaning as RTT. Also correct the buggy formular. o Handle reaction for Early Congestion Indication (ECI) within pkts_acked, as mentioned within pseudo code. o OWD is handled in relative format, where local time stamp will in tcp_time_stamp format. Port from 2.4.19 to 2.6.16 as module by: Wong Hoi Sing Edison <hswong3i@gmail.com> Hung Hing Lun <hlhung3i@gmail.com> Signed-off-by:
Wong Hoi Sing Edison <hswong3i@gmail.com> Signed-off-by:
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Andrew Morton authored
Oops fix from Stephen: remove duplicate rcv() calls. Signed-off-by:
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Alexey Dobriyan authored
GRE keys are 16-bit wide. Signed-off-by:
Patrick McHardy <kaber@trash.net> Signed-off-by:
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Patrick McHardy authored
Add SIP connection tracking helper. Originally written by Christian Hentschel <chentschel@arnet.com.ar>, some cleanup, minor fixes and bidirectional SIP support added by myself. Signed-off-by:
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Patrick McHardy authored
Call Forwarding doesn't need to create an expectation if both peers can reach each other without our help. The internal_net_addr parameter lets the user explicitly specify a single network where this is true, but is not very flexible and even fails in the common case that calls will both be forwarded to outside parties and inside parties. Use an optional heuristic based on routing instead, the assumption is that if bpth the outgoing device and the gateway are equal, both peers can reach each other directly. Signed-off-by:
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Jing Min Zhao authored
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Jing Min Zhao <zhaojingmin@users.sourceforge.net> Signed-off-by:
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Patrick McHardy authored
When a port number within a packet is replaced by a differently sized number only the packet is resized, but not the copy of the data. Following port numbers are rewritten based on their offsets within the copy, leading to packet corruption. Convert the amanda helper to the textsearch infrastructure to avoid the copy entirely. Signed-off-by:
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Patrick McHardy authored
Instead of skipping search entries for the wrong direction simply index them by direction. Based on patch by Pablo Neira <pablo@netfilter.org> Signed-off-by:
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Patrick McHardy authored
debug is the debug level, not a bool. Signed-off-by:
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Patrick McHardy authored
Instead of using the ID to find out where to continue dumping, take a reference to the last entry dumped and try to continue there. Signed-off-by:
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Patrick McHardy authored
The current configuration only allows to configure one manip and overloads conntrack status flags with netlink semantic. Signed-off-by:
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Eric Leblond authored
Add a flag in a connection status to have a non updated timeout. This permits to have connection that automatically die at a given time. Signed-off-by:
Eric Leblond <eric@inl.fr> Signed-off-by:
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Patrick McHardy authored
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Patrick McHardy authored
None of the existing helpers expects to get called for related ICMP packets and some even drop them if they can't parse them. Signed-off-by:
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Patrick McHardy authored
Replace the unmaintainable ipt_recent match by a rewritten version that should be fully compatible. Signed-off-by:
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Patrick McHardy authored
Add statistic match which is a combination of the nth and random matches. Signed-off-by:
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Patrick McHardy authored
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Patrick McHardy authored
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Patrick McHardy authored
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Herbert Xu authored
The size of the type_map array (256) comes from the number of IP protocols, i.e., IPPROTO_MAX. This patch is based on a suggestion from Ingo Oeser. Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Herbert Xu authored
Now that we have xfrm_mode objects we can move the transport mode specific input decapsulation code into xfrm_mode_transport. This removes duplicate code as well as unnecessary header movement in case of tunnel mode SAs since we will discard the original IP header immediately. This also fixes a minor bug for transport-mode ESP where the IP payload length is set to the correct value minus the header length (with extension headers for IPv6). Of course the other neat thing is that we no longer have to allocate temporary buffers to hold the IP headers for ESP and IPComp. Signed-off-by:
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Herbert Xu authored
This patch adds the structure xfrm_mode. It is meant to represent the operations carried out by transport/tunnel modes. By doing this we allow additional encapsulation modes to be added without clogging up the xfrm_input/xfrm_output paths. Candidate modes include 4-to-6 tunnel mode, 6-to-4 tunnel mode, and BEET modes. Signed-off-by:
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