- 14 Apr, 2008 40 commits
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Jan Engelhardt authored
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Jan Engelhardt <jengelh@computergmbh.de> Signed-off-by:
Patrick McHardy <kaber@trash.net>
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Jan Engelhardt authored
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Jan Engelhardt authored
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Jan Engelhardt authored
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Jan Engelhardt authored
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Jan Engelhardt authored
These functions are never called. Signed-off-by:
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Patrick McHardy authored
Add accessors for l3num and protonum and get rid of some overly long expressions. Signed-off-by: -
Patrick McHardy authored
Invalid states can cause out-of-bound memory accesses of the state table. Also don't insist on having a new state contained in the netlink message. Signed-off-by: -
Patrick McHardy authored
Connection tracking helpers (specifically FTP) need to be called before NAT sequence numbers adjustments are performed to be able to compare them against previously seen ones. We've introduced two new hooks around 2.6.11 to maintain this ordering when NAT modules were changed to get called from conntrack helpers directly. The cost of netfilter hooks is quite high and sequence number adjustments are only rarely needed however. Add a RCU-protected sequence number adjustment function pointer and call it from IPv4 conntrack after calling the helper. Signed-off-by: -
Patrick McHardy authored
New extensions may only be added to unconfirmed conntracks to avoid races when reallocating the storage. Also change NF_CT_ASSERT to use WARN_ON to get backtraces. Signed-off-by: -
Patrick McHardy authored
Adding extensions to confirmed conntracks is not allowed to avoid races on reallocation. Don't setup NAT for confirmed conntracks in case NAT module is loaded late. The has one side-effect, the connections existing before the NAT module was loaded won't enter the bysource hash. The only case where this actually makes a difference is in case of SNAT to a multirange where the IP before NAT is also part of the range. Since old connections don't enter the bysource hash the first new connection from the IP will have a new address selected. This shouldn't matter at all. Signed-off-by: -
Patrick McHardy authored
Locally generated ICMP packets have a reference to the conntrack entry of the original packet manually attached by icmp_send(). Therefore the check for locally originated untracked ICMP redirects can never be true. Signed-off-by: -
Patrick McHardy authored
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Patrick McHardy authored
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Patrick McHardy authored
Add DCCP conntrack helper. Thanks to Gerrit Renker <gerrit@erg.abdn.ac.uk> for review and testing. Signed-off-by: -
Patrick McHardy authored
Move the UDP-Lite conntrack checksum validation to a generic helper similar to nf_checksum() and make it fall back to nf_checksum() in case the full packet is to be checksummed and hardware checksums are available. This is to be used by DCCP conntrack, which also needs to verify partial checksums. Signed-off-by: -
Patrick McHardy authored
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Patrick McHardy authored
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Patrick McHardy authored
Move responsibility for setting the IP_NAT_RANGE_PROTO_SPECIFIED flag to the NAT protocol, properly propagate errors and get rid of ugly return value convention. Signed-off-by: -
Patrick McHardy authored
Move to nf_nat_proto_common and rename to nf_nat_proto_... since they're also used by protocols that don't have port numbers. Signed-off-by: -
Patrick McHardy authored
The port rover should not get overwritten when using random mode, otherwise other rules will also use more or less random ports. Signed-off-by: -
Patrick McHardy authored
Add generic ->in_range and ->unique_tuple ops to avoid duplicating them again and again for future NAT modules and save a few bytes of text: net/ipv4/netfilter/nf_nat_proto_tcp.c: tcp_in_range | -62 (removed) tcp_unique_tuple | -259 # 271 -> 12, # inlines: 1 -> 0, size inlines: 7 -> 0 2 functions changed, 321 bytes removed net/ipv4/netfilter/nf_nat_proto_udp.c: udp_in_range | -62 (removed) udp_unique_tuple | -259 # 271 -> 12, # inlines: 1 -> 0, size inlines: 7 -> 0 2 functions changed, 321 bytes removed net/ipv4/netfilter/nf_nat_proto_gre.c: gre_in_range | -62 (removed) 1 function changed, 62 bytes removed vmlinux: 5 functions changed, 704 bytes removed Signed-off-by: -
Patrick McHardy authored
Rule dumping is performed in two steps: first userspace gets the ruleset size using getsockopt(SO_GET_INFO) and allocates memory, then it calls getsockopt(SO_GET_ENTRIES) to actually dump the ruleset. When another process changes the ruleset in between the sizes from the first getsockopt call doesn't match anymore and the kernel aborts. Unfortunately it returns EAGAIN, as for multiple other possible errors, so userspace can't distinguish this case from real errors. Return EAGAIN so userspace can retry the operation. Fixes (with current iptables SVN version) netfilter bugzilla #104. Signed-off-by: -
Patrick McHardy authored
Some callers pass uninitialized structures, clear the address to make sure later comparisions work properly. Signed-off-by: -
Jan Engelhardt authored
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Jan Engelhardt authored
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Jan Engelhardt authored
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Jan Engelhardt authored
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Jan Engelhardt authored
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Jan Engelhardt authored
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Jan Engelhardt authored
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Jan Engelhardt authored
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Jan Engelhardt authored
The use of xt_sctp.h flagged up -Wshadow warnings in userspace, which prompted me to look at it and clean it up. Basic operations have been directly replaced by library calls (memcpy, memset is both available in the kernel and userspace, and usually faster than a self-made loop). The is_set and is_clear functions now use a processing time shortcut, too. Signed-off-by:
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Robert P. J. Day authored
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Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by:
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Robert P. J. Day authored
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Alexey Dobriyan authored
Commit 9335f047 aka "[NETFILTER]: ip_tables: per-netns FILTER, MANGLE, RAW" added per-netns _view_ of iptables rules. They were shown to user, but ignored by filtering code. Now that it's possible to at least ping loopback, per-netns tables can affect filtering decisions. netns is taken in case of PRE_ROUTING, LOCAL_IN -- from in device, POST_ROUTING, LOCAL_OUT -- from out device, FORWARD -- from in device which should be equal to out device's netns. This code is relatively new, so BUG_ON was plugged. Wrappers were added to a) keep code the same from CONFIG_NET_NS=n users (overwhelming majority), b) consolidate code in one place -- similar changes will be done in ipv6 and arp netfilter code. Signed-off-by:
Alexey Dobriyan <adobriyan@sw.ru> Signed-off-by:
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Patrick McHardy authored
Dump the mark value in log messages similar to nfnetlink_log. This is useful for debugging complex setups where marks are used for routing or traffic classification. Signed-off-by: -
Alexey Dobriyan authored
Patch splits creation of /proc/net/nf_conntrack, /proc/net/stat/nf_conntrack and net.netfilter hierarchy into their own functions with dummy ones if PROC_FS or SYSCTL is not set. Also, remove dead "ret = 0" write while I'm at it. Signed-off-by:
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Gerrit Renker authored
This expresses __skb_queue_tail() in terms of __skb_insert(), using __skb_insert_before() as auxiliary function. Signed-off-by:
Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Gerrit Renker authored
This expresses __skb_append in terms of __skb_queue_after, exploiting that __skb_append(old, new, list) = __skb_queue_after(list, old, new). Signed-off-by:
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