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2021-12-23netfilter: flowtable: remove ipv4/ipv6 modulesFlorian Westphal1-3/+0
Just place the structs and registration in the inet module. nf_flow_table_ipv6, nf_flow_table_ipv4 and nf_flow_table_inet share same module dependencies: nf_flow_table, nf_tables. before: text data bss dec hex filename 2278 1480 0 3758 eae nf_flow_table_inet.ko 1159 1352 0 2511 9cf nf_flow_table_ipv6.ko 1154 1352 0 2506 9ca nf_flow_table_ipv4.ko after: 2369 1672 0 4041 fc9 nf_flow_table_inet.ko Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-03-31netfilter: nf_log_arp: merge with nf_log_syslogFlorian Westphal1-3/+0
similar to previous change: nf_log_syslog now covers ARP logging as well, the old nf_log_arp module is removed. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-03-31netfilter: nf_log_ipv4: rename to nf_log_syslogFlorian Westphal1-1/+0
Netfilter has multiple log modules: nf_log_arp nf_log_bridge nf_log_ipv4 nf_log_ipv6 nf_log_netdev nfnetlink_log nf_log_common With the exception of nfnetlink_log (packet is sent to userspace for dissection/logging), all of them log to the kernel ringbuffer. This is the first part of a series to merge all modules except nfnetlink_log into a single module: nf_log_syslog. This allows to reduce code. After the series, only two log modules remain: nfnetlink_log and nf_log_syslog. The latter provides the same functionality as the old per-af log modules. This renames nf_log_ipv4 to nf_log_syslog. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2019-09-13netfilter: fix coding-style errors.Jeremy Sowden1-1/+1
Several header-files, Kconfig files and Makefiles have trailing white-space. Remove it. In netfilter/Kconfig, indent the type of CONFIG_NETFILTER_NETLINK_ACCT correctly. There are semicolons at the end of two function definitions in include/net/netfilter/nf_conntrack_acct.h and include/net/netfilter/nf_conntrack_ecache.h. Remove them. Fix indentation in nf_conntrack_l4proto.h. Signed-off-by: Jeremy Sowden <jeremy@azazel.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2019-04-11netfilter: x_tables: merge ip and ipv6 masquerade modulesFlorian Westphal1-1/+0
No need to have separate modules for this. before: text data bss dec filename 2038 1168 0 3206 net/ipv4/netfilter/ipt_MASQUERADE.ko 1526 1024 0 2550 net/ipv6/netfilter/ip6t_MASQUERADE.ko after: text data bss dec filename 2521 1296 0 3817 net/netfilter/xt_MASQUERADE.ko Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2019-04-08netfilter: nf_tables: merge route type into coreFlorian Westphal1-1/+0
very little code, so it really doesn't make sense to have extra modules or even a kconfig knob for this. Merge them and make functionality available unconditionally. The merge makes inet family route support trivial, so add it as well here. Before: text data bss dec hex filename 835 832 0 1667 683 nft_chain_route_ipv4.ko 870 832 0 1702 6a6 nft_chain_route_ipv6.ko 111568 2556 529 114653 1bfdd nf_tables.ko After: text data bss dec hex filename 113133 2556 529 116218 1c5fa nf_tables.ko Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2019-03-01netfilter: nf_tables: merge ipv4 and ipv6 nat chain typesFlorian Westphal1-1/+0
Merge the ipv4 and ipv6 nat chain type. This is the last missing piece which allows to provide inet family support for nat in a follow patch. The kconfig knobs for ipv4/ipv6 nat chain are removed, the nat chain type will be built unconditionally if NFT_NAT expression is enabled. Before: text data bss dec hex filename 1576 896 0 2472 9a8 nft_chain_nat_ipv4.ko 1697 896 0 2593 a21 nft_chain_nat_ipv6.ko After: text data bss dec hex filename 1832 896 0 2728 aa8 nft_chain_nat.ko Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2019-03-01netfilter: nf_tables: nat: merge nft_masq protocol specific modulesFlorian Westphal1-1/+0
The family specific masq modules are way too small to warrant an extra module, just place all of them in nft_masq. before: text data bss dec hex filename 1001 832 0 1833 729 nft_masq.ko 766 896 0 1662 67e nft_masq_ipv4.ko 764 896 0 1660 67c nft_masq_ipv6.ko after: 2010 960 0 2970 b9a nft_masq.ko Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2019-03-01netfilter: nf_tables: nat: merge nft_redir protocol specific modulesFlorian Westphal1-1/+0
before: text data bss dec hex filename 990 832 0 1822 71e nft_redir.ko 697 896 0 1593 639 nft_redir_ipv4.ko 713 896 0 1609 649 nft_redir_ipv6.ko after: text data bss dec hex filename 1910 960 0 2870 b36 nft_redir.ko size is reduced, all helpers from nft_redir.ko can be made static. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2019-02-27netfilter: nat: merge nf_nat_ipv4,6 into nat coreFlorian Westphal1-3/+0
before: text data bss dec hex filename 16566 1576 4136 22278 5706 nf_nat.ko 3598 844 0 4442 115a nf_nat_ipv6.ko 3187 844 0 4031 fbf nf_nat_ipv4.ko after: text data bss dec hex filename 22948 1612 4136 28696 7018 nf_nat.ko ... with ipv4/v6 nat now provided directly via nf_nat.ko. Also changes: ret = nf_nat_ipv4_fn(priv, skb, state); if (ret != NF_DROP && ret != NF_STOLEN && into if (ret != NF_ACCEPT) return ret; everywhere. The nat hooks never should return anything other than ACCEPT or DROP (and the latter only in rare error cases). The original code uses multi-line ANDing including assignment-in-if: if (ret != NF_DROP && ret != NF_STOLEN && !(IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) && (ct = nf_ct_get(skb, &ctinfo)) != NULL) { I removed this while moving, breaking those in separate conditionals and moving the assignments into extra lines. checkpatch still generates some warnings: 1. Overly long lines (of moved code). Breaking them is even more ugly. so I kept this as-is. 2. use of extern function declarations in a .c file. This is necessary evil, we must call nf_nat_l3proto_register() from the nat core now. All l3proto related functions are removed later in this series, those prototypes are then removed as well. v2: keep empty nf_nat_ipv6_csum_update stub for CONFIG_IPV6=n case. v3: remove IS_ENABLED(NF_NAT_IPV4/6) tests, NF_NAT_IPVx toggles are removed here. v4: also get rid of the assignments in conditionals. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2019-02-27netfilter: nat: merge ipv4 and ipv6 masquerade functionalityFlorian Westphal1-1/+0
Before: text data bss dec hex filename 13916 1412 4128 19456 4c00 nf_nat.ko 4510 968 4 5482 156a nf_nat_ipv4.ko 5146 944 8 6098 17d2 nf_nat_ipv6.ko After: text data bss dec hex filename 16566 1576 4136 22278 5706 nf_nat.ko 3187 844 0 4031 fbf nf_nat_ipv4.ko 3598 844 0 4442 115a nf_nat_ipv6.ko ... so no drastic changes in combined size. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-12-17netfilter: nat: remove nf_nat_l4proto structFlorian Westphal1-4/+1
This removes the (now empty) nf_nat_l4proto struct, all its instances and all the no longer needed runtime (un)register functionality. nf_nat_need_gre() can be axed as well: the module that calls it (to load the no-longer-existing nat_gre module) also calls other nat core functions. GRE nat is now always available if kernel is built with it. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-07-17netfilter: conntrack: remove l3proto abstractionFlorian Westphal1-6/+0
This unifies ipv4 and ipv6 protocol trackers and removes the l3proto abstraction. This gets rid of all l3proto indirect calls and the need to do a lookup on the function to call for l3 demux. It increases module size by only a small amount (12kbyte), so this reduces size because nf_conntrack.ko is useless without either nf_conntrack_ipv4 or nf_conntrack_ipv6 module. before: text data bss dec hex filename 7357 1088 0 8445 20fd nf_conntrack_ipv4.ko 7405 1084 4 8493 212d nf_conntrack_ipv6.ko 72614 13689 236 86539 1520b nf_conntrack.ko 19K nf_conntrack_ipv4.ko 19K nf_conntrack_ipv6.ko 179K nf_conntrack.ko after: text data bss dec hex filename 79277 13937 236 93450 16d0a nf_conntrack.ko 191K nf_conntrack.ko Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-06-03netfilter: Libify xt_TPROXYMáté Eckl1-0/+1
The extracted functions will likely be usefull to implement tproxy support in nf_tables. Extrancted functions: - nf_tproxy_sk_is_transparent - nf_tproxy_laddr4 - nf_tproxy_handle_time_wait4 - nf_tproxy_get_sock_v4 - nf_tproxy_laddr6 - nf_tproxy_handle_time_wait6 - nf_tproxy_get_sock_v6 (nf_)tproxy_handle_time_wait6 also needed some refactor as its current implementation was xtables-specific. Signed-off-by: Máté Eckl <ecklm94@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-05-29netfilter: nat: merge ipv4/ipv6 masquerade code into main nat moduleFlorian Westphal1-3/+1
Instead of using extra modules for these, turn the config options into an implicit dependency that adds masq feature to the protocol specific nf_nat module. before: text data bss dec hex filename 2001 860 4 2865 b31 net/ipv4/netfilter/nf_nat_masquerade_ipv4.ko 5579 780 2 6361 18d9 net/ipv4/netfilter/nf_nat_ipv4.ko 2860 836 8 3704 e78 net/ipv6/netfilter/nf_nat_masquerade_ipv6.ko 6648 780 2 7430 1d06 net/ipv6/netfilter/nf_nat_ipv6.ko after: text data bss dec hex filename 7245 872 8 8125 1fbd net/ipv4/netfilter/nf_nat_ipv4.ko 9165 848 12 10025 2729 net/ipv6/netfilter/nf_nat_ipv6.ko Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-04-07kbuild: rename *-asn1.[ch] to *.asn1.[ch]Masahiro Yamada1-2/+2
Our convention is to distinguish file types by suffixes with a period as a separator. *-asn1.[ch] is a different pattern from other generated sources such as *.lex.c, *.tab.[ch], *.dtb.S, etc. More confusing, files with '-asn1.[ch]' are generated files, but '_asn1.[ch]' are checked-in files: net/netfilter/nf_conntrack_h323_asn1.c include/linux/netfilter/nf_conntrack_h323_asn1.h include/linux/sunrpc/gss_asn1.h Rename generated files to *.asn1.[ch] for consistency. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-04-07kbuild: clean up *-asn1.[ch] patterns from top-level MakefileMasahiro Yamada1-1/+0
Clean up these patterns from the top Makefile to omit 'clean-files' in each Makefile. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-04-01Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-1/+1
Minor conflicts in drivers/net/ethernet/mellanox/mlx5/core/en_rep.c, we had some overlapping changes: 1) In 'net' MLX5E_PARAMS_LOG_{SQ,RQ}_SIZE --> MLX5E_REP_PARAMS_LOG_{SQ,RQ}_SIZE 2) In 'net-next' params->log_rq_size is renamed to be params->log_rq_mtu_frames. 3) In 'net-next' params->hard_mtu is added. Signed-off-by: David S. Miller <davem@davemloft.net>
2018-03-30netfilter: nf_tables: build-in filter chain typePablo Neira Ayuso1-2/+0
One module per supported filter chain family type takes too much memory for very little code - too much modularization - place all chain filter definitions in one single file. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-03-29netfilter: nf_nat_snmp_basic: add correct dependency to MakefileMasahiro Yamada1-1/+1
nf_nat_snmp_basic_main.c includes a generated header, but the necessary dependency is missing in Makefile. This could cause build error in parallel building. Remove a weird line, and add a correct one. Fixes: cc2d58634e0f ("netfilter: nf_nat_snmp_basic: use asn1 decoder library") Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-01-19netfilter: nf_nat_snmp_basic: use asn1 decoder libraryTaehee Yoo1-0/+6
The basic SNMP ALG parse snmp ASN.1 payload however, since 2012 linux kernel provide ASN.1 decoder library. If we use ASN.1 decoder in the /lib/asn1_decoder.c, we can remove about 1000 line of ASN.1 parsing routine. To use asn1_decoder.c, we should write mib file(nf_nat_snmp_basic.asn1) then /script/asn1_compiler.c makes *-asn1.c and *-asn1.h file at the compiletime.(nf_nat_snmp_basic-asn1.c, nf_nat_snmp_basic-asn1.h) The nf_nat_snmp_basic.asn1 is made by RFC1155, RFC1157, RFC1902, RFC1905, RFC2578, RFC3416. of course that mib file supports only the basic SNMP ALG. Previous SNMP ALG mangles only first octet of IPv4 address. but after this patch, the SNMP ALG mangles whole IPv4 Address. And SNMPv3 is not supported. I tested with snmp commands such ans snmpd, snmpwalk, snmptrap. Signed-off-by: Taehee Yoo <ap420073@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2018-01-08netfilter: flow table support for IPv4Pablo Neira Ayuso1-0/+3
This patch adds the IPv4 flow table type, that implements the datapath flow table to forward IPv4 traffic. Rationale is: 1) Look up for the packet in the flow table, from the ingress hook. 2) If there's a hit, decrement ttl and pass it on to the neighbour layer for transmission. 3) If there's a miss, packet is passed up to the classic forwarding path. This patch also supports layer 3 source and destination NAT. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2017-11-02License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman1-0/+1
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-01netfilter: move socket lookup infrastructure to nf_socket_ipv{4,6}.cPablo Neira Ayuso1-0/+2
We need this split to reuse existing codebase for the upcoming nf_tables socket expression. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-11-01netfilter: nf_tables: add fib expressionFlorian Westphal1-0/+1
Add FIB expression, supported for ipv4, ipv6 and inet family (the latter just dispatches to ipv4 or ipv6 one based on nfproto). Currently supports fetching output interface index/name and the rtm_type associated with an address. This can be used for adding path filtering. rtm_type is useful to e.g. enforce a strong-end host model where packets are only accepted if daddr is configured on the interface the packet arrived on. The fib expression is a native nftables alternative to the xtables addrtype and rp_filter matches. FIB result order for oif/oifname retrieval is as follows: - if packet is local (skb has rtable, RTF_LOCAL set, this will also catch looped-back multicast packets), set oif to the loopback interface. - if fib lookup returns an error, or result points to local, store zero result. This means '--local' option of -m rpfilter is not supported. It is possible to use 'fib type local' or add explicit saddr/daddr matching rules to create exceptions if this is really needed. - store result in the destination register. In case of multiple routes, search set for desired oif in case strict matching is requested. ipv4 and ipv6 behave fib expressions are supposed to behave the same. [ I have collapsed Arnd Bergmann's ("netfilter: nf_tables: fib warnings") http://patchwork.ozlabs.org/patch/688615/ to address fallout from this patch after rebasing nf-next, that was posted to address compilation warnings. --pablo ] Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-08-13netfilter: remove ip_conntrack* sysctl compat codePablo Neira Ayuso1-5/+0
This backward compatibility has been around for more than ten years, since Yasuyuki Kozakai introduced IPv6 in conntrack. These days, we have alternate /proc/net/nf_conntrack* entries, the ctnetlink interface and the conntrack utility got adopted by many people in the user community according to what I observed on the netfilter user mailing list. So let's get rid of this. Note that nf_conntrack_htable_size and unsigned int nf_conntrack_max do not need to be exported as symbol anymore. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-08-07netfilter: nf_tables: add nft_dup expressionPablo Neira Ayuso1-0/+1
This new expression uses the nf_dup engine to clone packets to a given gateway. Unlike xt_TEE, we use an index to indicate output interface which should be fine at this stage. Moreover, change to the preemtion-safe this_cpu_read(nf_skb_duplicated) from nf_dup_ipv{4,6} to silence a lockdep splat. Based on the original tee expression from Arturo Borrero Gonzalez, although this patch has diverted quite a bit from this initial effort due to the change to support maps. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-08-07netfilter: factor out packet duplication for IPv4/IPv6Pablo Neira Ayuso1-0/+2
Extracted from the xtables TEE target. This creates two new modules for IPv4 and IPv6 that are shared between the TEE target and the new nf_tables dup expressions. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-11-27netfilter: combine IPv4 and IPv6 nf_nat_redirect code in one modulePablo Neira Ayuso1-1/+0
This resolves linking problems with CONFIG_IPV6=n: net/built-in.o: In function `redirect_tg6': xt_REDIRECT.c:(.text+0x6d021): undefined reference to `nf_nat_redirect_ipv6' Reported-by: Andreas Ruprecht <rupran@einserver.de> Reported-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-10-27netfilter: nf_tables: add new expression nft_redirArturo Borrero1-0/+1
This new expression provides NAT in the redirect flavour, which is to redirect packets to local machine. Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-10-27netfilter: refactor NAT redirect IPv4 to use it from nf_tablesArturo Borrero1-0/+1
This patch refactors the IPv4 code so it can be usable both from xt and nf_tables. A similar patch follows-up to handle IPv6. Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-10-02netfilter: move nf_send_resetX() code to nf_reject_ipvX modulesPablo Neira Ayuso1-0/+3
Move nf_send_reset() and nf_send_reset6() to nf_reject_ipv4 and nf_reject_ipv6 respectively. This code is shared by x_tables and nf_tables. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-09-10Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller1-0/+2
Pablo Neira Ayuso says: ==================== nf-next pull request The following patchset contains Netfilter/IPVS updates for your net-next tree. Regarding nf_tables, most updates focus on consolidating the NAT infrastructure and adding support for masquerading. More specifically, they are: 1) use __u8 instead of u_int8_t in arptables header, from Mike Frysinger. 2) Add support to match by skb->pkttype to the meta expression, from Ana Rey. 3) Add support to match by cpu to the meta expression, also from Ana Rey. 4) A smatch warning about IPSET_ATTR_MARKMASK validation, patch from Vytas Dauksa. 5) Fix netnet and netportnet hash types the range support for IPv4, from Sergey Popovich. 6) Fix missing-field-initializer warnings resolved, from Mark Rustad. 7) Dan Carperter reported possible integer overflows in ipset, from Jozsef Kadlecsick. 8) Filter out accounting objects in nfacct by type, so you can selectively reset quotas, from Alexey Perevalov. 9) Move specific NAT IPv4 functions to the core so x_tables and nf_tables can share the same NAT IPv4 engine. 10) Use the new NAT IPv4 functions from nft_chain_nat_ipv4. 11) Move specific NAT IPv6 functions to the core so x_tables and nf_tables can share the same NAT IPv4 engine. 12) Use the new NAT IPv6 functions from nft_chain_nat_ipv6. 13) Refactor code to add nft_delrule(), which can be reused in the enhancement of the NFT_MSG_DELTABLE to remove a table and its content, from Arturo Borrero. 14) Add a helper function to unregister chain hooks, from Arturo Borrero. 15) A cleanup to rename to nft_delrule_by_chain for consistency with the new nft_*() functions, also from Arturo. 16) Add support to match devgroup to the meta expression, from Ana Rey. 17) Reduce stack usage for IPVS socket option, from Julian Anastasov. 18) Remove unnecessary textsearch state initialization in xt_string, from Bojan Prtvar. 19) Add several helper functions to nf_tables, more work to prepare the enhancement of NFT_MSG_DELTABLE, again from Arturo Borrero. 20) Enhance NFT_MSG_DELTABLE to delete a table and its content, from Arturo Borrero. 21) Support NAT flags in the nat expression to indicate the flavour, eg. random fully, from Arturo. 22) Add missing audit code to ebtables when replacing tables, from Nicolas Dichtel. 23) Generalize the IPv4 masquerading code to allow its re-use from nf_tables, from Arturo. 24) Generalize the IPv6 masquerading code, also from Arturo. 25) Add the new masq expression to support IPv4/IPv6 masquerading from nf_tables, also from Arturo. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-09netfilter: nf_tables: add new nft_masq expressionArturo Borrero1-0/+1
The nft_masq expression is intended to perform NAT in the masquerade flavour. We decided to have the masquerade functionality in a separated expression other than nft_nat. Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-09-09netfilter: nf_nat: generalize IPv4 masquerading support for nf_tablesArturo Borrero1-0/+1
Let's refactor the code so we can reach the masquerade functionality from outside the xt context (ie. nftables). The patch includes the addition of an atomic counter to the masquerade notifier: the stuff to be done by the notifier is the same for xt and nftables. Therefore, only one notification handler is needed. This factorization only involves IPv4; a similar patch follows to handle IPv6. Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-08-18netfilter: move NAT Kconfig switches out of the iptables scopePablo Neira Ayuso1-1/+1
Currently, the NAT configs depend on iptables and ip6tables. However, users should be capable of enabling NAT for nft without having to switch on iptables. Fix this by adding new specific IP_NF_NAT and IP6_NF_NAT config switches for iptables and ip6tables NAT support. I have also moved the original NF_NAT_IPV4 and NF_NAT_IPV6 configs out of the scope of iptables to make them independent of it. This patch also adds NETFILTER_XT_NAT which selects the xt_nat combo that provides snat/dnat for iptables. We cannot use NF_NAT anymore since nf_tables can select this. Reported-by: Matteo Croce <technoboy85@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-07-25netfilter: kill remnants of ulog targetsPaul Bolle1-1/+0
The ulog targets were recently killed. A few references to the Kconfig macros CONFIG_IP_NF_TARGET_ULOG and CONFIG_BRIDGE_EBT_ULOG were left untouched. Kill these too. Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-06-27netfilter: add generic ARP packet loggerPablo Neira Ayuso1-0/+1
This adds the generic plain text packet loggger for ARP packets. It is based on the ebt_log code. Nevertheless, the output has been modified to make it consistent with the original xt_LOG output. This is an example output: IN=wlan0 OUT= ARP HTYPE=1 PTYPE=0x0800 OPCODE=2 MACSRC=00:ab:12:34:55:63 IPSRC=192.168.10.1 MACDST=80:09:12:70:4f:50 IPDST=192.168.10.150 This patch enables packet logging from ARP chains, eg. nft add rule arp filter input log prefix "input: " Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-06-27netfilter: log: split family specific code to nf_log_{ip,ip6,common}.c filesPablo Neira Ayuso1-0/+3
The plain text logging is currently embedded into the xt_LOG target. In order to be able to use the plain text logging from nft_log, as a first step, this patch moves the family specific code to the following files and Kconfig symbols: 1) net/ipv4/netfilter/nf_log_ip.c: CONFIG_NF_LOG_IPV4 2) net/ipv6/netfilter/nf_log_ip6.c: CONFIG_NF_LOG_IPV6 3) net/netfilter/nf_log_common.c: CONFIG_NF_LOG_COMMON These new modules will be required by xt_LOG and nft_log. This patch is based on original patch from Arturo Borrero Gonzalez. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-02-06netfilter: nft_reject: split up reject module into IPv4 and IPv6 specifc partsPatrick McHardy1-0/+1
Currently the nft_reject module depends on symbols from ipv6. This is wrong since no generic module should force IPv6 support to be loaded. Split up the module into AF-specific and a generic part. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2013-12-30netfilter: nft_reject: support for IPv6 and TCP resetEric Leblond1-1/+0
This patch moves nft_reject_ipv4 to nft_reject and adds support for IPv6 protocol. This patch uses functions included in nf_reject.h to implement reject by TCP reset. The code has to be build as a module if NF_TABLES_IPV6 is also a module to avoid compilation error due to usage of IPv6 functions. This has been done in Kconfig by using the construct: depends on NF_TABLES_IPV6 || !NF_TABLES_IPV6 This seems a bit weird in terms of syntax but works perfectly. Signed-off-by: Eric Leblond <eric@regit.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2013-10-14netfilter: nf_tables: add ARP filtering supportPablo Neira Ayuso1-0/+1
This patch registers the ARP family and he filter chain type for this family. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2013-10-14netfilter: nf_tables: convert built-in tables/chains to chain typesPablo Neira Ayuso1-2/+2
This patch converts built-in tables/chains to chain types that allows you to deploy customized table and chain configurations from userspace. After this patch, you have to specify the chain type when creating a new chain: add chain ip filter output { type filter hook input priority 0; } ^^^^ ------ The existing chain types after this patch are: filter, route and nat. Note that tables are just containers of chains with no specific semantics, which is a significant change with regards to iptables. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2013-10-14netfilter: add nftablesPatrick McHardy1-0/+5
This patch adds nftables which is the intended successor of iptables. This packet filtering framework reuses the existing netfilter hooks, the connection tracking system, the NAT subsystem, the transparent proxying engine, the logging infrastructure and the userspace packet queueing facilities. In a nutshell, nftables provides a pseudo-state machine with 4 general purpose registers of 128 bits and 1 specific purpose register to store verdicts. This pseudo-machine comes with an extensible instruction set, a.k.a. "expressions" in the nftables jargon. The expressions included in this patch provide the basic functionality, they are: * bitwise: to perform bitwise operations. * byteorder: to change from host/network endianess. * cmp: to compare data with the content of the registers. * counter: to enable counters on rules. * ct: to store conntrack keys into register. * exthdr: to match IPv6 extension headers. * immediate: to load data into registers. * limit: to limit matching based on packet rate. * log: to log packets. * meta: to match metainformation that usually comes with the skbuff. * nat: to perform Network Address Translation. * payload: to fetch data from the packet payload and store it into registers. * reject (IPv4 only): to explicitly close connection, eg. TCP RST. Using this instruction-set, the userspace utility 'nft' can transform the rules expressed in human-readable text representation (using a new syntax, inspired by tcpdump) to nftables bytecode. nftables also inherits the table, chain and rule objects from iptables, but in a more configurable way, and it also includes the original datatype-agnostic set infrastructure with mapping support. This set infrastructure is enhanced in the follow up patch (netfilter: nf_tables: add netlink set API). This patch includes the following components: * the netlink API: net/netfilter/nf_tables_api.c and include/uapi/netfilter/nf_tables.h * the packet filter core: net/netfilter/nf_tables_core.c * the expressions (described above): net/netfilter/nft_*.c * the filter tables: arp, IPv4, IPv6 and bridge: net/ipv4/netfilter/nf_tables_ipv4.c net/ipv6/netfilter/nf_tables_ipv6.c net/ipv4/netfilter/nf_tables_arp.c net/bridge/netfilter/nf_tables_bridge.c * the NAT table (IPv4 only): net/ipv4/netfilter/nf_table_nat_ipv4.c * the route table (similar to mangle): net/ipv4/netfilter/nf_table_route_ipv4.c net/ipv6/netfilter/nf_table_route_ipv6.c * internal definitions under: include/net/netfilter/nf_tables.h include/net/netfilter/nf_tables_core.h * It also includes an skeleton expression: net/netfilter/nft_expr_template.c and the preliminary implementation of the meta target net/netfilter/nft_meta_target.c It also includes a change in struct nf_hook_ops to add a new pointer to store private data to the hook, that is used to store the rule list per chain. This patch is based on the patch from Patrick McHardy, plus merged accumulated cleanups, fixes and small enhancements to the nftables code that has been done since 2009, which are: From Patrick McHardy: * nf_tables: adjust netlink handler function signatures * nf_tables: only retry table lookup after successful table module load * nf_tables: fix event notification echo and avoid unnecessary messages * nft_ct: add l3proto support * nf_tables: pass expression context to nft_validate_data_load() * nf_tables: remove redundant definition * nft_ct: fix maxattr initialization * nf_tables: fix invalid event type in nf_tables_getrule() * nf_tables: simplify nft_data_init() usage * nf_tables: build in more core modules * nf_tables: fix double lookup expression unregistation * nf_tables: move expression initialization to nf_tables_core.c * nf_tables: build in payload module * nf_tables: use NFPROTO constants * nf_tables: rename pid variables to portid * nf_tables: save 48 bits per rule * nf_tables: introduce chain rename * nf_tables: check for duplicate names on chain rename * nf_tables: remove ability to specify handles for new rules * nf_tables: return error for rule change request * nf_tables: return error for NLM_F_REPLACE without rule handle * nf_tables: include NLM_F_APPEND/NLM_F_REPLACE flags in rule notification * nf_tables: fix NLM_F_MULTI usage in netlink notifications * nf_tables: include NLM_F_APPEND in rule dumps From Pablo Neira Ayuso: * nf_tables: fix stack overflow in nf_tables_newrule * nf_tables: nft_ct: fix compilation warning * nf_tables: nft_ct: fix crash with invalid packets * nft_log: group and qthreshold are 2^16 * nf_tables: nft_meta: fix socket uid,gid handling * nft_counter: allow to restore counters * nf_tables: fix module autoload * nf_tables: allow to remove all rules placed in one chain * nf_tables: use 64-bits rule handle instead of 16-bits * nf_tables: fix chain after rule deletion * nf_tables: improve deletion performance * nf_tables: add missing code in route chain type * nf_tables: rise maximum number of expressions from 12 to 128 * nf_tables: don't delete table if in use * nf_tables: fix basechain release From Tomasz Bursztyka: * nf_tables: Add support for changing users chain's name * nf_tables: Change chain's name to be fixed sized * nf_tables: Add support for replacing a rule by another one * nf_tables: Update uapi nftables netlink header documentation From Florian Westphal: * nft_log: group is u16, snaplen u32 From Phil Oester: * nf_tables: operational limit match Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2013-08-28netfilter: add SYNPROXY core/targetPatrick McHardy1-0/+1
Add a SYNPROXY for netfilter. The code is split into two parts, the synproxy core with common functions and an address family specific target. The SYNPROXY receives the connection request from the client, responds with a SYN/ACK containing a SYN cookie and announcing a zero window and checks whether the final ACK from the client contains a valid cookie. It then establishes a connection to the original destination and, if successful, sends a window update to the client with the window size announced by the server. Support for timestamps, SACK, window scaling and MSS options can be statically configured as target parameters if the features of the server are known. If timestamps are used, the timestamp value sent back to the client in the SYN/ACK will be different from the real timestamp of the server. In order to now break PAWS, the timestamps are translated in the direction server->client. Signed-off-by: Patrick McHardy <kaber@trash.net> Tested-by: Martin Topholm <mph@one.com> Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-09-21netfilter: combine ipt_REDIRECT and ip6t_REDIRECTJan Engelhardt1-1/+0
Combine more modules since the actual code is so small anyway that the kmod metadata and the module in its loaded state totally outweighs the combined actual code size. IP_NF_TARGET_REDIRECT becomes a compat option; IP6_NF_TARGET_REDIRECT is completely eliminated since it has not see a release yet. Signed-off-by: Jan Engelhardt <jengelh@inai.de> Acked-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-09-21netfilter: combine ipt_NETMAP and ip6t_NETMAPJan Engelhardt1-1/+0
Combine more modules since the actual code is so small anyway that the kmod metadata and the module in its loaded state totally outweighs the combined actual code size. IP_NF_TARGET_NETMAP becomes a compat option; IP6_NF_TARGET_NETMAP is completely eliminated since it has not see a release yet. Signed-off-by: Jan Engelhardt <jengelh@inai.de> Acked-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-08-30netfilter: nf_nat: support IPv6 in TFTP NAT helperPablo Neira Ayuso1-1/+0
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net>
2012-08-30netfilter: nf_nat: support IPv6 in IRC NAT helperPablo Neira Ayuso1-1/+0
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net>
2012-08-30netfilter: nf_nat: support IPv6 in SIP NAT helperPatrick McHardy1-1/+0
Add IPv6 support to the SIP NAT helper. There are no functional differences to IPv4 NAT, just different formats for addresses. Signed-off-by: Patrick McHardy <kaber@trash.net>
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