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* dump: support filtering by zoneFelix Huettner2024-01-241-0/+5
| | | | | | | | | | | | based on a kernel side extension of the conntrack api, this patch brings this extension to userspace. When dumping the conntrack table we can now filter based on the conntrack zone directly in kernel space. If the kernel does not yet support this feature this filtering is ignored. Signed-off-by: Felix Huettner <felix.huettner@mail.schwarz> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* Adding NFCT_FILTER_DUMP_TUPLE in filter_dump_attr, using kernel CTA_FILTER APIRomain Bellan2023-09-142-0/+14
| | | | | | | | | | | | | Following kernel side new conntrack filtering API, this patch implements userspace part. This patch: * Update headers to get new flag value from kernel * Use a conntrack struct to configure filtering * Set netlink flags according to values set in conntrack struct Signed-off-by: Romain Bellan <romain.bellan@wifirst.fr> Signed-off-by: Florent Fourcot <florent.fourcot@wifirst.fr> Signed-off-by: Florian Westphal <fw@strlen.de>
* conntrack: add nfct_nlmsg_build_filter() helperPablo Neira Ayuso2021-11-141-0/+1
| | | | | | | This helper function builds the payload of the netlink dump request including the filtering criteria. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* include: add CTA_STATS_CHAIN_TOOLONG from linux 5.15 uapiFlorian Westphal2021-09-081-0/+1
| | | | Signed-off-by: Florian Westphal <fw@strlen.de>
* src: add support for status dump filterFlorian Westphal2021-08-051-2/+3
| | | | | | | | | | | This tells kernel to suppress conntrack entries that do not match the status bits/bitmask filter. This is useful to e.g. only list entries that are not assured (value 0, mask == ASSUED) or entries that only saw one-way traffic (value 0, mask == SEEN_REPLY). Signed-off-by: Florian Westphal <fw@strlen.de>
* include: sync uapi header with nf-nextFlorian Westphal2021-08-051-5/+19
| | | | Signed-off-by: Florian Westphal <fw@strlen.de>
* conntrack: add flush filter commandPablo Neira Ayuso2020-10-291-0/+1
| | | | | | | | The NFCT_Q_FLUSH command flushes both IPv4 and IPv6 conntrack tables. Add new command NFCT_Q_FLUSH_FILTER that allows to flush based on the family to retain backward compatibility on NFCT_Q_FLUSH. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* include: add CTA_STATS_CLASH_RESOLVEFlorian Westphal2020-08-261-0/+1
| | | | Signed-off-by: Florian Westphal <fw@strlen.de>
* conntrack: sctp: update statesFlorian Westphal2020-08-141-0/+2
| | | | | | | | with more recent kernels "conntrack -L" prints NONE instead of HEARTBEAT_SENT/RECEIVED because the state is unknown in userspace. Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Pablo Neira Ayuso <pablo@netfilter.org>
* src: add IPS_HW_OFFLOAD flagPablo Neira Ayuso2020-04-281-2/+16
| | | | | | This flags specifies that this conntrack entry is in hardware. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* conntrack: support for IPS_OFFLOADPablo Neira Ayuso2019-08-091-2/+22
| | | | | | Print [OFFLOAD] tag when listing entries via snprintf() interface. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* conntrack: add synproxy supportPablo Neira Ayuso2018-03-242-0/+13
| | | | Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* include: expose a copy of nf_conntrack_common.hPablo Neira Ayuso2016-11-243-71/+149
| | | | | | | | | | | | | | | | | | Get rid of copy&paster definitions that were made long time ago, this is causing problems. Copy and rename nf_conntrack_common.h to linux_nf_conntrack_common.h, then include it from libnetfilter_conntrack.h After that change, we can remove the status flags definition in libnetfilter_conntrack.h that was copied and pasted from the above file. This helps us solve compilation errors due to redeclaration: /usr/include/libnetfilter_conntrack/libnetfilter_conntrack.h:729:6: error: redeclaration of ‘enum ip_conntrack_status’ In file included from nf-log.c:12:0: /usr/include/linux/netfilter/nf_conntrack_common.h:37:6: note: originally defined here Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* conntrack: labels: add function to fetch default config file locationFlorian Westphal2016-08-081-0/+1
| | | | | | Suggested-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
* src: add support for IPv6 NATArturo Borrero2016-05-201-0/+2
| | | | | | | | | | The conntrackd daemon lacks support for syncing IPv6 NATed connections. This patch adds support for managing the IPv6 part of struct __nfct_nat, also updating the corresponsing symbols. Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* conntrack: add zone attribute to tupleDaniel Borkmann2015-09-292-0/+3
| | | | | | | | This patch adds the front-end to the recent ctnetlink interface changes that add the zone attribute into the tuple. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* src: Use stdint types everywhereFelix Janda2015-05-251-42/+42
| | | | | Signed-off-by: Felix Janda <felix.janda@posteo.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* include: Sync with kernel headersFelix Janda2015-05-251-4/+19
| | | | | Signed-off-by: Felix Janda <felix.janda@posteo.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* conntrack: add mark event filterKen-ichirou MATSUZAWA2015-03-131-0/+1
| | | | | | | | This patch adds mark filter for event listener, using same struct nfct_filter_dump_mark at dump. Signed-off-by: Ken-ichirou MATSUZAWA <chamas@h4.dion.ne.jp> Signed-off-by: Florian Westphal <fw@strlen.de>
* conntrack: api: add two new bitmask functionsKen-ichirou MATSUZAWA2014-09-111-0/+3
| | | | | | | | This patch adds two functions, useful for ulogd IPFIX output module. Signed-off-by: Ken-ichirou MATSUZAWA <chamas@h4.dion.ne.jp> Signed-off-by: Florian Westphal <fw@strlen.de>
* conntrack: api: add nfct_snprintf_labelsFlorian Westphal2013-07-041-0/+8
| | | | | | | | | | | | | | | | | | | | nfct_snprintf doesn't print connlabels, as they're system specific and can easily generate lots of output. This adds a new helper function, nfct_snprintf_labels. It behaves like nfct_snprintf, except that the label names in the labelmap whose bits are contained in connlabel attribute bitset are added to the buffer. output looks like this: output looks like this: ... mark=0 use=1 labels=eth0-in,eth1-in or <labels> <label>eth0-in</label> <label>eth1-in</label> </labels> Signed-off-by: Florian Westphal <fw@strlen.de>
* api: add CTA_LABEL_MASK attribute handlingFlorian Westphal2013-05-062-0/+2
| | | | | | | allows to set/clear only a subset of the in-kernel label set, e.g. "set bit 1 and do not change any others". Signed-off-by: Florian Westphal <fw@strlen.de>
* api: add connlabel api and attributeFlorian Westphal2013-05-062-0/+10
| | | | | | | | | | | | | | | | | | | | | | adds new labelmap api to create a name <-> bit mapping from a text file (default: /etc/xtables/connlabel.conf). nfct_labelmap_new(filename) is used to create the map, nfct_labelmap_destroy() releases the resources allocated for the map. Two functions are added to make map lookups: nfct_labelmap_get_name(map, bit) returns the name of a bit, nfct_labelmap_get_bit returns the bit associated with a name. The connlabel attribute is represented by a nfct_bitmask object, the nfct_bitmask api can be used to test/set/get individual bits ("labels"). The exisiting nfct_attr_get/set interfaces can be used to read or replace the existing labels associated with a conntrack with a new set. Signed-off-by: Florian Westphal <fw@strlen.de>
* api: add nfct_bitmask objectFlorian Westphal2013-05-061-0/+12
| | | | | | | | | | | | In order to use generic getter/setter API with upcoming conntrack label extension, add helper functions to set/test/unset bits in a vector of arbitrary size. Conntrack labels will then be encoded via nfct_bitmask object. Original idea from Pablo Neira Ayuso. Signed-off-by: Florian Westphal <fw@strlen.de>
* refresh our public copy of nfnetlink_conntrack.hPablo Neira Ayuso2012-12-041-0/+2
| | | | | | To include: IPCTNL_MSG_CT_GET_DYING and IPCTNL_MSG_CT_GET_UNCONFIRMED Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* include: refresh linux_nfnetlink_conntrack.hPablo Neira Ayuso2012-06-271-0/+38
| | | | Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* conntrack: add nfct_set_attr_l and ATTR_HELPER_INFOPablo Neira Ayuso2012-06-262-0/+7
| | | | | | | | | | | | | | This adds the ATTR_HELPER_INFO that can be used to send binary data that will be attached to the conntrack. This is useful for the user-space connection tracking support. This patch also adds a new interface: nfct_set_attr_l(attr, type, value, length); that is used to set the variable length helper information. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* expect: add new API to build/parse ctnetlink messages using libmnlPablo Neira Ayuso2012-05-261-0/+5
| | | | | | | | This patch adds support to build and to parse netlink messages from/to one user-space nf_conntrack object. It uses libmnl, thus libnetfilter_conntrack now depends on this library. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* conntrack: add new API to build/parse ctnetlink messages using libmnlPablo Neira Ayuso2012-05-261-0/+6
| | | | | | | | | | | | | | | This patch adds support to build and to parse netlink messages from/to one user-space nf_conntrack object. It uses libmnl, thus libnetfilter_conntrack now depends on this library. This is the first patch in the direction of removing the dependency on the veteran libnfnetlink. I have decided to update LIBVERSION in this patch. I know it's recommended to do this before releasing the software. I prefer to do this so snapshot packages get the correct LIBVERSION. Signed-off-by: Pablo Neira Ayuso <pablo@gnumonks.org>
* conntrack: add new ATTR_GRP_[ORIG|REPL]_ADDR_[SRC|DST] attributePablo Neira Ayuso2012-04-271-0/+10
| | | | | | | | | | | | | | | | | | | | This allows you to set and to get the address for both IPv4 and IPV6 using the same interface. This can simplify much redundant code that needs to support both protocols. This relies on some fixed layout union: union nfct_attr_grp_addr { u_int32_t ip; u_int32_t ip6[4]; u_int32_t addr[4]; }; But I don't see this library will support anything different from IPv4 and IPv6 as layer 3 protocol. If that happens and some point, we can add some new attribute group and deprecate this one. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* conntrack: add support for CTA_MARK_MASK and filtered dumpingPablo Neira Ayuso2012-02-092-1/+31
| | | | | | | | This patch adds the infrastructure to allow filtered dumping. See utils/conntrack_dump_filter.c for instance. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* expect: add expectfn supportPablo Neira Ayuso2012-02-062-0/+2
| | | | | | This patch allows you to set expectfn. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* expect: add NAT supportPablo Neira Ayuso2012-02-062-0/+11
| | | | | | This patch adds ATTR_EXP_NAT_TUPLE and ATTR_EXP_NAT_DIR attributes. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* expect: add class supportPablo Neira Ayuso2012-02-062-0/+2
| | | | | | This patch allows you to specify the expectation class. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* expect: add nfexp_cmpPablo Neira Ayuso2012-01-041-0/+4
| | | | | | | | | This patch adds nfexp_cmp that allows you to compare two expectation objects. This includes the extension of test_api for this new function. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* include: remove reference to licensing terms from headersPablo Neira Ayuso2012-01-026-42/+0
| | | | | | | | | | This patch removes the reference to the licensing terms of the library in the header files. This patch does *not* change the license of the library at all, which is still GPLv2+, of course. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* src: clarify licensing terms of library (GPLv2+)Pablo Neira Ayuso2011-12-302-10/+5
| | | | | | | | | | | | | | | | This patch is *not* changing the licensing terms of this library (which was initially released under GPLv2 and later on extended to GPLv2+ after contacting all the contributors who kindly agreed to extend it to any later GPL version). Jan says: "In libnetfilter_conntrack, there are many .c files declaring GNU GPL incorporated herein by reference without telling which version(s) exactly apply. Given src/main.c for example is actually GPL-2.0+, the reference made is ambiguous." This patch should definitely clarify this. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* src: export NFCT_HELPER_NAME_MAXPablo Neira Ayuso2011-12-241-0/+5
| | | | | | | NFCT_HELPER_NAME_MAX is 16, which is the maximum helper name allowed since 2.6.29. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* expect: support CTA_EXPECT_HELP_NAMEPablo Neira Ayuso2011-12-241-0/+1
| | | | | | | | This patch adds support for CTA_EXPECT_HELP_NAME. We now have the ATTR_EXP_HELPER_NAME attribute. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* expect: add nfexp_send()Pablo Neira Ayuso2011-12-081-0/+5
| | | | | | It is like nfct_send() but for expectations, for API symmetry. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* src: deprecate low level APIPablo Neira Ayuso2011-02-221-6/+12
| | | | | | | | | | | | This patch deprecates the low level API. This API is not currently used by any known clients (at least, at a quick glance at google). These functions are a problem if we plan to port libnetfilter_conntrack upon libmnl since they contain specific libnfnetlink bits. I have also added __build_query_[ct|exp] to avoid compilation warnings. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* conntrack: deprecate nfct_sizeof() and nfct_maxsize() functionsPablo Neira Ayuso2011-02-171-2/+2
| | | | | | | | | These functions are evil since they allow the use of memcpy() instead of nfct_copy(). This is a problem because it violates the design principle that the library follows, that is to provide opaque objects in which the client code does not care on the binary layout. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* conntrack: add NFCT_CP_OVERRIDE flag for nfct_copy()Pablo Neira Ayuso2011-02-171-0/+1
| | | | | | | | Thus, we have a fast version of nfct_copy() which allows to copy the destination to the origin. After this call, the destination is a clone of the origin. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* conntrack: add timestamp supportPablo Neira Ayuso2011-02-172-0/+14
| | | | | | | | | | | | This patch adds the connection tracking extension that allows conntrack timestamping. This requires a Linux kernel >= 2.6.38. We have now 65 attributes, we need 96 bits to store what attributes are set in the objects. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* include: sync IPS_* bits with current in the Linux kernelPablo Neira Ayuso2011-02-061-1/+9
| | | | Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* src: add support for CTA_SECCTXPablo Neira Ayuso2011-01-162-1/+10
| | | | | | | This patch adds support for the new attribute CTA_SECCTX that supersedes CTA_SECMARK. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* src: replace CTA_PROTOINFO_DCCP_SEQ by CTA_PROTOINFO_DCCP_HANDSHAKE_SEQPablo Neira Ayuso2010-12-181-1/+1
| | | | | | | | | | | This patch uses CTA_PROTOINFO_DCCP_HANDSHAKE_SEQ instead which is the name that is used in the Linux kernel header. Thus, both the headers and the internal copy for the library are in sync. This problem was probably introduced at the time that we added support for the DCCP handshake sequence number. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* expect: export already implement low-level functionsPablo Neira Ayuso2010-11-091-0/+18
| | | | | | | | | | | This patch exports several low-level function that allow to build and parse netlink messages that contain ctnetlink expectation information. They have been in the tree for quite so long, but they were not exported. To leave the library in a consistent state (ctnetlink conntrack functions provide the similar functionality) I have decided to export them. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* expect: add support for CTA_EXPECT_FLAGSPablo Neira Ayuso2010-10-072-0/+7
| | | | | | This patch allows to set the expectation flags from user-space. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* expect: add CTA_EXPECT_ZONE supportPablo Neira Ayuso2010-10-072-1/+2
| | | | | | | We also remove the reference to CTA_EXPECT_QUEUENR with was not ever pushed into Linux kernel mainline. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>