- 18 Jun, 2006 40 commits
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Patrick McHardy authored
create_proc_entry must not be called with locks held. Use a mutex instead to protect data only changed in user context. Signed-off-by:
Patrick McHardy <kaber@trash.net> Signed-off-by:
David S. Miller <davem@davemloft.net>
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James Morris authored
Add new per-packet access controls to SELinux, replacing the old packet controls. Packets are labeled with the iptables SECMARK and CONNSECMARK targets, then security policy for the packets is enforced with these controls. To allow for a smooth transition to the new controls, the old code is still present, but not active by default. To restore previous behavior, the old controls may be activated at runtime by writing a '1' to /selinux/compat_net, and also via the kernel boot parameter selinux_compat_net. Switching between the network control models requires the security load_policy permission. The old controls will probably eventually be removed and any continued use is discouraged. With this patch, the new secmark controls for SElinux are disabled by default, so existing behavior is entirely preserved, and the user is not affected at all. It also provides a config option to enable the secmark controls by default (which can always be overridden at boot and runtime). It is also noted in the kconfig help that the user will need updated userspace if enabling secmark controls for SELinux and that they'll probably need the SECMARK and CONNMARK targets, and conntrack protocol helpers, although such decisions are beyond the scope of kernel configuration. Signed-off-by:
James Morris <jmorris@namei.org> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
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James Morris authored
Add a new xtables target, CONNSECMARK, which is used to specify rules for copying security marks from packets to connections, and for copyying security marks back from connections to packets. This is similar to the CONNMARK target, but is more limited in scope in that it only allows copying of security marks to and from packets, as this is all it needs to do. A typical scenario would be to apply a security mark to a 'new' packet with SECMARK, then copy that to its conntrack via CONNMARK, and then restore the security mark from the connection to established and related packets on that connection. Signed-off-by:
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James Morris authored
Add a secmark field to IP and NF conntracks, so that security markings on packets can be copied to their associated connections, and also copied back to packets as required. This is similar to the network mark field currently used with conntrack, although it is intended for enforcement of security policy rather than network policy. Signed-off-by:
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James Morris authored
Add a SECMARK target to xtables, allowing the admin to apply security marks to packets via both iptables and ip6tables. The target currently handles SELinux security marking, but can be extended for other purposes as needed. Signed-off-by:
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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:
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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.pdfSigned-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.htmlSigned-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:
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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
Signed-off-by:
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
Signed-off-by:
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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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