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2023-03-31nat: fix nat44 vrf handlersDaniel Béreš1-2/+2
Change of enums used in REPLY_MACRO() to appropriate one for handlers: -vl_api_nat44_ed_add_del_vrf_table_t_handler -vl_api_nat44_ed_add_del_vrf_route_t_handler Type: fix Change-Id: I58e97817b1678da7c025c0d03a8b938a4e0f7b6c Signed-off-by: Daniel Béreš <daniel.beres@pantheon.tech>
2023-02-03nat: fix accidental o2i deletion/reuseDmitry Valter1-0/+6
Nat session is allocated before the port allocation. During port allocation candidate address+port are set to o2i 6-tuple and tested against the flow hash. If insertion fails, the port is busy and rejected. When all N attempts are unsuccessful, "out-of-ports" error is recorded and the session is to be deleted. During session deletion o2i and i2o tuples are deleted from the flow hash. In case of "out-of-ports" i2o tuple is not valid, however o2i is and it refers to **some other** session that's known to be allocated. By backing match tuple up session should be invalidated well enough not to collide with any valid one. Type: fix Signed-off-by: Dmitry Valter <d-valter@yandex-team.ru> Change-Id: Id30be6f26ecce7a5a63135fb971bb65ce318af82
2023-01-11nat: do not use nat session object after deletionBenoît Ganne2-0/+10
Type: fix Change-Id: Ifc709b6e7217a893d13aee6d3019e699637366ef Signed-off-by: Benoît Ganne <bganne@cisco.com>
2022-12-19nat: fix incorrect using about sw_if_index in nat44-ed static mapping v2 api.Huawei LI1-1/+1
Type: fix Signed-off-by: Huawei LI <lihuawei_zzu@163.com> Change-Id: I2a96ab0dafe4db796704341c325c43a6960be312
2022-12-19nat: fix memory leak and refactor nat44-ed db init/free.Huawei LI1-22/+31
fix memory leak and refactor nat44-ed db init/free through. how to reproduce memory leak: input "set nat44 session limit 50000 vrf 1" repeatedly. Program received signal SIGABRT, Aborted. 0x00007ff4b3cc5337 in raise () from /lib64/libc.so.6 (gdb) bt 0 0x00007ff4b3cc5337 in raise () from /lib64/libc.so.6 1 0x00007ff4b3cc6a28 in abort () from /lib64/libc.so.6 2 0x00000000004079db in os_panic () at /usr/src/debug/vpp-23.02/src/vpp/vnet/main.c:417 3 0x00007ff4b43e784f in os_out_of_memory () at /usr/src/debug/vpp-23.02/src/vppinfra/unix-misc.c:221 4 0x00007ff4b43a71aa in clib_mem_heap_alloc_inline (heap=0x0, size=27263040, align=64, os_out_of_memory_on_failure=1) at /usr/src/debug/vpp-23.02/src/vppinfra/mem_dlmalloc.c:613 5 0x00007ff4b43a7256 in clib_mem_alloc_aligned (size=27263040, align=64) at /usr/src/debug/vpp-23.02/src/vppinfra/mem_dlmalloc.c:635 6 0x00007ff4b522fafa in alloc_aligned_16_8 (h=0x7ff46a7815b8 <snat_main+408>, nbytes=27262976) at /usr/src/debug/vpp-23.02/src/vppinfra/bihash_template.c:59 7 0x00007ff4b522fd12 in clib_bihash_instantiate_16_8 (h=0x7ff46a7815b8 <snat_main+408>) at /usr/src/debug/vpp-23.02/src/vppinfra/bihash_template.c:163 8 0x00007ff4b5230037 in clib_bihash_init2_16_8 (a=0x7ff465f36870) at /usr/src/debug/vpp-23.02/src/vppinfra/bihash_template.c:245 9 0x00007ff4b52300ac in clib_bihash_init_16_8 (h=0x7ff46a7815b8 <snat_main+408>, name=0x7ff46a754871 "ed-flow-hash", nbuckets=262144, memory_size=0) at /usr/src/debug/vpp-23.02/src/vppinfra/bihash_template.c:260 10 0x00007ff46a7013e8 in reinit_ed_flow_hash () at /usr/src/debug/vpp-23.02/src/plugins/nat/nat44-ed/nat44_ed.c:3264 11 0x00007ff46a7014fd in nat44_ed_sessions_clear () at /usr/src/debug/vpp-23.02/src/plugins/nat/nat44-ed/nat44_ed.c:3299 12 0x00007ff46a701044 in nat44_update_session_limit (session_limit=70000, vrf_id=1) at /usr/src/debug/vpp-23.02/src/plugins/nat/nat44-ed/nat44_ed.c:3225 13 0x00007ff46a73d3d1 in nat44_set_session_limit_command_fn (vm=0x7ff473c8f740, input=0x7ff465f36ef0, cmd=0x7ff474c5ce48) at /usr/src/debug/vpp-23.02/src/plugins/nat/nat44-ed/nat44_ed_cli.c:1638 14 0x00007ff4b5d56527 in vlib_cli_dispatch_sub_commands (vm=0x7ff473c8f740, cm=0x4273f0 <vlib_global_main+48>, input=0x7ff465f36ef0, parent_command_index=97) at /usr/src/debug/vpp-23.02/src/vlib/cli.c:650 15 0x00007ff4b5d562c3 in vlib_cli_dispatch_sub_commands (vm=0x7ff473c8f740, cm=0x4273f0 <vlib_global_main+48>, input=0x7ff465f36ef0, parent_command_index=98) at /usr/src/debug/vpp-23.02/src/vlib/cli.c:607 16 0x00007ff4b5d562c3 in vlib_cli_dispatch_sub_commands (vm=0x7ff473c8f740, cm=0x4273f0 <vlib_global_main+48>, input=0x7ff465f36ef0, parent_command_index=21) at /usr/src/debug/vpp-23.02/src/vlib/cli.c:607 17 0x00007ff4b5d562c3 in vlib_cli_dispatch_sub_commands (vm=0x7ff473c8f740, cm=0x4273f0 <vlib_global_main+48>, input=0x7ff465f36ef0, parent_command_index=0) at /usr/src/debug/vpp-23.02/src/vlib/cli.c:607 18 0x00007ff4b5d569cb in vlib_cli_input (vm=0x7ff473c8f740, input=0x7ff465f36ef0, function=0x7ff4b5dc2406 <unix_vlib_cli_output>, function_arg=0) ---Type <return> to continue, or q <return> to quit--- at /usr/src/debug/vpp-23.02/src/vlib/cli.c:753 19 0x00007ff4b5dc7b0c in unix_cli_process_input (cm=0x7ff4b5e4ae00 <unix_cli_main>, cli_file_index=0) at /usr/src/debug/vpp-23.02/src/vlib/unix/cli.c:2616 20 0x00007ff4b5dc825a in unix_cli_process (vm=0x7ff473c8f740, rt=0x7ff4797a5280, f=0x0) at /usr/src/debug/vpp-23.02/src/vlib/unix/cli.c:2745 21 0x00007ff4b5d80a25 in vlib_process_bootstrap (_a=140687718901968) at /usr/src/debug/vpp-23.02/src/vlib/main.c:1221 22 0x00007ff4b439e298 in clib_calljmp () at /usr/src/debug/vpp-23.02/src/vppinfra/longjmp.S:123 23 0x00007ff4698268a0 in ?? () 24 0x00007ff4b5d80b4e in vlib_process_startup (vm=0x7ff4b43a77a3 <clib_mem_size+24>, p=0x7ff4698268d0, f=0x7ff474b1e580) at /usr/src/debug/vpp-23.02/src/vlib/main.c:1246 25 0x00007ff4b5dbdbe6 in vec_max_bytes (v=0x8) at /usr/src/debug/vpp-23.02/src/vppinfra/vec_bootstrap.h:161 26 0x00007ff474b1e598 in ?? () 27 0x0000000000000004 in ?? () 28 0x00000000000000ff in ?? () 29 0x00007ff469826980 in ?? () 30 0x00007ff4b5dbddcb in _vec_set_len ( v=<error reading variable: Cannot access memory at address 0xfffffffffffffff5>, len=<error reading variable: Cannot access memory at address 0xffffffffffffffed>, elt_sz=<error reading variable: Cannot access memory at address 0xffffffffffffffe5>) at /usr/src/debug/vpp-23.02/src/vppinfra/vec_bootstrap.h:196 Backtrace stopped: previous frame inner to this frame (corrupt stack?) (gdb) Type: fix Signed-off-by: Huawei LI <lihuawei_zzu@163.com> Change-Id: I52a7d229c95e4ab30f7f2cfe574440aa37bed6a2
2022-12-15nat: disable nat44-ed/ei features on interface deletionVladislav Grishenko2-0/+98
After deleting a sw interface with nat44 features, the next created sw interface will get the same sw_index reused and therefore will erroneously have the same nat features enabled. Type: fix Change-Id: I1d84f842ab7ab2a757668ae1a111efe67e1e924d Signed-off-by: Vladislav Grishenko <themiron@yandex-team.ru>
2022-12-09nat: fixed return values of enable/disable callFilip Varga3-13/+17
NAT44 enable/disable return status was used instead of appropriate VNET_API_ERROR_ code. Type: fix Signed-off-by: Filip Varga <filipvarga89@gmail.com> Change-Id: If944866bf3061afdc91284c0ad475135e529bdc4
2022-11-10nat: updating my maintainer email addressFilip Varga1-1/+1
Type: fix Signed-off-by: Filip Varga <filipvarga89@gmail.com> Change-Id: I1f5069df2dc743ecd1269e947dd375cb1b84970f
2022-11-07nat: fix per-vrf session bookkeepingJing Peng3-34/+26
Each NAT44 ED session has a per_vrf_sessions_index referencing an element in the thread-local vector per_vrf_sessions_vec. However this index can be possibly invalidated by vec_del1() in per_vrf_sessions_cleanup(), before a session is registered. Such a stale index can cause an assertion failure in function per_vrf_sessions_is_expired() when we use it to locate the per_vrf_sessions object. A possible sequence to reproduce is: 1. Create two NAT44 ED sessions s1, s2 so that two per_vrf_sessions are created: index 0: between VRF pair 10 and 11 (expired=0, ses_count=1) index 1: between VRF pair 20 and 21 (expired=0, ses_count=1) For the sessions we have: s1->per_vrf_sessions_index == 0 s2->per_vrf_sessions_index == 1 2. Delete the first session via CLI, now the two per_vrf_sessions become: index 0: between VRF pair 10 and 11 (expired=0, ses_count=0) index 1: between VRF pair 20 and 21 (expired=0, ses_count=1) For the sessions we have: s2->per_vrf_sessions_index == 1 3. Delete the VRF 11: index 0: between VRF pair 10 and 11 (expired=1, ses_count=0) index 1: between VRF pair 20 and 21 (expired=0, ses_count=1) For the sessions we have: s2->per_vrf_sessions_index == 1 4. Create a new session s3 between VRF pair 20 and 21 so that the first per_vrf_sessions will be deleted: index 0: between VRF pair 20 and 21 (expired=0, ses_count=2) For the sessions we have: s2->per_vrf_sessions_index == 1 s3->per_vrf_sessions_index == 0 Here, note that the actual index of per_vrf_session is changed due to vec_del1(). The new session is added after the cleanup so it gets the correct index. But the index held by the existing session is not updated. 5. Trigger the fast path of the session s2. To achieve this, session s2 could be created in step 1 by ping -i20 -Iiface_in_vrf_10 1.1.1.1 and steps 2-4 should then be performed within the 20-second interval. This patch fixes this by changing per_vrf_sessions_vec to a pool so that indicies are kept intact. Type: fix Signed-off-by: Jing Peng <jing@meter.com> Change-Id: I4c08f9bfd50134bcb5f08e50ad61af2bddbcb645
2022-11-07nat: fix byte order error.Huawei LI1-6/+4
fix byte order error about the struct snat_address_t's member net. for example configurations: set interface ip table loop1 1 set interface ip addr loop1 10.10.10.2/24 nat44 add address 10.10.10.2 tenant-vrf 1 the snat address's net should be "as_u8 = {0xa, 0xa, 0xa, 0x0}", but now it's "as_u8 = {0x0, 0xa, 0xa, 0x2}" because of missing transition of byte order about the member net of snat_address_t. (gdb) p/x *snat_main->addresses $3 = {addr = {data = {0xa, 0xa, 0xa, 0x2}, data_u32 = 0x20a0a0a, as_u8 = {0xa, 0xa, 0xa, 0x2}, as_u16 = {0xa0a, 0x20a}, as_u32 = 0x20a0a0a}, net = {data = {0x0, 0xa, 0xa, 0x2}, data_u32 = 0x20a0a00, as_u8 = {0x0, 0xa, 0xa, 0x2}, as_u16 = {0xa00, 0x20a}, as_u32 = 0x20a0a00}, sw_if_index = 0x3, fib_index = 0x1,addr_len = 0x18} (gdb) Type: fix Signed-off-by: Huawei LI <lihuawei_zzu@163.com> Change-Id: I4f25f0639ae90a7f2e8715b44f825571283d994d
2022-11-04nat: cleanup of deprecated featuresFilip Varga3-296/+0
Type: refactor 1) Removed deprecated API. - These specific APIs do not have repleacement because features that they controled aren't part of current NAT44-ED implementation anymore. 2) Removed unused typedef of port allocation funciton. - Missed left over removed. Change-Id: Ib3f763449065eda7cdcb2c6565a9cae51baf23d6 Signed-off-by: Filip Varga <filipvarga89@gmail.com>
2022-10-12misc: fix issues reported by clang-15Damjan Marion1-1/+1
Type: improvement Change-Id: I3fbbda0378b72843ecd39a7e8592dedc9757793a Signed-off-by: Damjan Marion <dmarion@me.com>
2022-10-11nat: report time between current vpp time and last_heardDave Cornejo4-0/+274
existing details report the last_heard as the seconds since VPP started, this is not very useful, so report additionaly time_since_last_heard in seconds between VPP time and last_heard. Change-Id: Ifd34b1449e57919242b1f0e22156d3590af3c738 Type: improvement Signed-off-by: Dave Cornejo <dcornejo@netgate.com> Signed-off-by: Vladimir Ratnikov <vratnikov@netgate.com>
2022-09-20nat: adding docs for nat44-ed sub pluginFilip Varga1-0/+729
Type: docs Change-Id: Icfa2bdc9367f8438b53da7c89caec263ed6ab056 Signed-off-by: Filip Varga <fivarga@cisco.com> Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
2022-09-15nat: fix nat44-ed port range with multiple workersVladislav Grishenko4-8/+15
The number of available dynamic ports is set to (0xffff - 1024) = 64511, which is not divisable by the pow2 number of workers - the only integer divisors are 31 and 2081. So, total dynamic port range of all workers will be less than it: 1 wrk: n = (port_per_thread = 64511/1)*1 = 64511 + 1025 = 65536 2 wrk: n = (port_per_thread = 64511/2)*2 = 64510 + 1025 = 65535 4 wrk: n = (port_per_thread = 64511/4)*4 = 64508 + 1025 = 65533 8 wrk: n = (port_per_thread = 64511/8)*8 = 64504 + 1025 = 65529 ... As seen, with multiple workers there are unused trailing ports for every nat pool address and that is the reason of out-of-bound index in the worker array on out2in path due (port - 1024) / port_per_thread math. This was fixed in 5c9f9968de63fa627b4a72b344df36cdc686d18a, so packets to unused ports will go to existing worker and dropped there. Per RFC 6335 https://www.rfc-editor.org/rfc/rfc6335#section-6: 6. Port Number Ranges o the System Ports, also known as the Well Known Ports, from 0-1023 (assigned by IANA) o the User Ports, also known as the Registered Ports, from 1024- 49151 (assigned by IANA) o the Dynamic Ports, also known as the Private or Ephemeral Ports, from 49152-65535 (never assigned) According that let's allocate dynamic ports from 1024 and have full port range with a wide range of the workers number - 64 integer divisors in total, including pow2 ones: 1 wrk: n = (port_per_thread = 64512/1)*1 = 64512 + 1024 = 65536 2 wrk: n = (port_per_thread = 64512/2)*2 = 64512 + 1024 = 65536 3 wrk: n = (port_per_thread = 64512/3)*3 = 64512 + 1024 = 65536 4 wrk: n = (port_per_thread = 64512/4)*4 = 64512 + 1024 = 65536 5 wrk: n = (port_per_thread = 64512/5)*5 = 64510 + 1024 = 65534 6 wrk: n = (port_per_thread = 64512/6)*6 = 64512 + 1024 = 65536 7 wrk: n = (port_per_thread = 64512/7)*7 = 64512 + 1024 = 65536 8 wrk: n = (port_per_thread = 64512/8)*8 = 64512 + 1024 = 65536 ... Modulo from 5c9f9968de63fa627b4a72b344df36cdc686d18a is still required when the numbers of workers is not the integer divisor of 64512. Type: fix Fixes: 5c9f9968de63fa627b4a72b344df36cdc686d18a Change-Id: I9edaea07e58ff4888812b0d86cbf41a3784b189e Signed-off-by: Vladislav Grishenko <themiron@yandex-team.ru>
2022-09-09nat: fix nat44-ed-in2out fast path next nodeJing Peng1-1/+1
When a session is found expired, the next node of in2out fast path should be in2out slow path instead of out2in slow path. Type: fix Signed-off-by: Jing Peng <jing@meter.com> Change-Id: If1dd920502089c25b33bea5434823b0496a44499
2022-08-31nat: fix coverity 249194Andrew Yourtchenko1-1/+1
Zero-initialize a variable. Type: fix Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com> Change-Id: Iccf2eb4bf26755d6cd93fc70df3c5481d69ce7eb
2022-08-31nat: fix coverity 249178Andrew Yourtchenko1-1/+1
Zero-initialize the variable Type: fix Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com> Change-Id: I4ee127ac3e2a3beffa11bbc96db1f3254b3f7c5d
2022-08-29nat: fix coverity 249202Benoît Ganne1-2/+2
In case of a bad packet, the bihash kv is not initialized before being copied in the trace. Make sure it is initialized to 0. Type: fix Change-Id: I22fcfe99f3586d0fa128493059547a56557b8fb5 Signed-off-by: Benoît Ganne <bganne@cisco.com>
2022-08-19nat: simplify per-protocol code by using an arrayJon Loeliger4-243/+158
rather than using obfuscated macro hacery, simplify the per-protocol data management by directly using an array of NAT protocol types. Type: refactor Signed-off-by: Jon Loeliger <jdl@netgate.com> Change-Id: I6fe987556ac9f402f8d490da0740e2b91440304c
2022-08-18nat: Replace port refcounts with simple bitvectorsJon Loeliger2-17/+80
Previously, each address maintained an array of 32-bit reference counts for each of 65K possible ports for each of 4 NAT protocols. Totalling 1MB per address. Wow. A close read of the code shows that an "is used" check precedes each attempted reference count increment. That means the refcount never actually gets above 1. That in turn means algorithmically, a bit vector is sufficient. And one need not be allocated for more than the highest validated port referenced. These changes introduce a dynamically sized bit vector replacing the reference counts, for a maximum of 32K if all 4 protocols use port 65535. In fact, protocol OTHER is never used, so at most 24K will be used, and none of it will be "statically" allocated per address. Type: fix Fixes: 85bee7548bc5a360851d92807dae6d4159b68314 Change-Id: I7fd70050e7bf4871692a862231f8f38cf0158132 Signed-off-by: Jon Loeliger <jdl@netgate.com>
2022-08-16nat: fix potential out-of-bound worker array indexJing Peng3-24/+36
In several NAT submodules, the number of available ports (0xffff - 1024) may not be divisible by the number of workers, so port_per_thread is determined by integer division, which is the floor of the quotient. Later when a worker index is needed, dividing the port with port_per_thread may yield an out-of-bound array index into the workers array. As an example, assume 2 workers are configured, then port_per_thread will be (0xffff - 1024) / 2, which is 32255. When we compute a worker index with port 0xffff, we get (0xffff - 1024) / 32255, which is 2, but since we only have 2 workers, only 0 and 1 are valid indices. This patch fixes the problem by adding a modulo at the end of the division. Type: fix Signed-off-by: Jing Peng <pj.hades@gmail.com> Change-Id: Ieae3d5faf716410422610484a68222f1c957f3f8
2022-05-31nat: disable nat44-ei-in2out-output ttl checkAlexander Skorichenko1-3/+3
Type: fix A packet passing through nat44-ei-in2out-output, has its ttl value validated in earlier nodes. "ip4-input" node checks ttl for locally generated packets. "ip4-rewrite" node validates ttl in forwarded packets. Thus for example, the ED counterpart disables ttl checks in its "nat44-ed-in2out-output" node. This patch updates nat44 EI conditions for ttl checks to those currently used in nat44 ED case, meaning no extra ttl validation for in2out when output-feature is enabled. Signed-off-by: Alexander Skorichenko <askorichenko@netgate.com> Change-Id: Idd15d7c9a746b60c0a6dac5537d00ef10c257fdc
2022-05-12pnat: add support to wildcard IP Protocol field if not specifiedFahad Naeem4-4/+39
- add pnat_binding_add_v2 which explicitly requires match mask to set to PNAT_PROTO if we want to match on IP Protocol - fix pnat_binding_add backward compatibility i.e. no need to set match mast to PNAT_PROTO Type: improvement Signed-off-by: Fahad Naeem <fahadnaeemkhan@gmail.com> Change-Id: I5a23244be55b7d4c10552c555881527a4b2f325f
2022-05-10tests: replace pycodestyle with blackKlement Sekera14-229/+315
Drop pycodestyle for code style checking in favor of black. Black is much faster, stable PEP8 compliant code style checker offering also automatic formatting. It aims to be very stable and produce smallest diffs. It's used by many small and big projects. Running checkstyle with black takes a few seconds with a terse output. Thus, test-checkstyle-diff is no longer necessary. Expand scope of checkstyle to all python files in the repo, replacing test-checkstyle with checkstyle-python. Also, fixstyle-python is now available for automatic style formatting. Note: python virtualenv has been consolidated in test/Makefile, test/requirements*.txt which will eventually be moved to a central location. This is required to simply the automated generation of docker executor images in the CI. Type: improvement Change-Id: I022a326603485f58585e879ac0f697fceefbc9c8 Signed-off-by: Klement Sekera <klement.sekera@gmail.com> Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
2022-05-10nat: improve icmp type detection performanceKlement Sekera1-12/+10
Replace code with branchless code. Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: Ic38a20ad33483c1c26f90a927f8b963b0ead4a87
2022-04-21nat: tweak rfc7857 tcp connection trackingOle Troan4-292/+61
The RFC7857 state machine introduced in 56c492a is a trade-off. It tries to retain sessions as much as possible and also offers some protection against spurious RST by re-establishing sessions if data is received after the RST. From experience in the wild, this algorithm is a little too liberal, as it leaves too many spurious established sessions in the session table. E.g. a oberserved pattern is: client server <- FIN, ACK ACK -> ACK -> RST, ACK -> With the current state machine this would leave the session in established state. These proposed changes do: - require 3-way handshake to establish session. (current requires only to see SYNs from both sides) - RST will move session to transitory without recovery if data is sent after - Only a single FIN is needed to move to transitory Fixes: 56c492aa0502751de2dd9d890096a82c5f04776d Type: fix Signed-off-by: Ole Troan <ot@cisco.com> Change-Id: I92e593e00b2efe48d04997642d85bd59e0eaa2ea Signed-off-by: Ole Troan <ot@cisco.com>
2022-04-18nat: fix deleting nat ei out interface featureAlexander Skorichenko1-2/+2
Type: fix Set is_add function argument to 0 when deleting interface role. Change-Id: I6ca88d6511e1c88285e51b3750eb501fde2b341b Signed-off-by: Alexander Skorichenko <askorichenko@netgate.com>
2022-04-05nat: nat44 cli bug fixFilip Varga5-42/+38
Two similar CLI paths "nat44" and "nat44 add interface address" caused unexpected behavior. If "nat44 add interface address" command would fail the vlib cli processing function would call "nat44" handler. This would also clean any previously set errors from the first command and basically return same error returned by "nat44" handler for every failed command that starts with the same path string. Fixes nat44-ed and nat44-ei plugin. Change-Id: I1aac85c8ae2932da582a2b78243521d1bf8a0653 Ticket: VPP-2021 Type: fix Signed-off-by: Filip Varga <fivarga@cisco.com>
2022-04-01nat: VRF routing & FIB improvementsFilip Varga8-281/+727
This patch affects how destination fib is choosen during session creation. Default behavior of choosing fib based on output interfaces is kept. Configuration gives you the ability to change default behavior to direct or restrict traffic between different FIB tables. NAT specific VRF routing options: a) keeping communication in the same VRF b) option to add multiple destination VRFs c) option to control the resolution order of destination VRFs TX FIB resolution is based on looking up RX FIB entry in NATs VRF table and picking the first FIB that resolves destination address. Ticket: VPP-2009 Type: improvement Change-Id: If500c48d7ce3466533ad9581c0847870788fc4fb Signed-off-by: Filip Varga <fivarga@cisco.com>
2022-04-01nat: nat44-ed cleanup & fixesFilip Varga7-1303/+645
Set deprecated option on unsupported API calls. Cleaned up API calls with deprecated option. Removed in progress option from long term used API calls. Removed obsolete/unused nodes, functions, variables. Fixed set frame queue nelts function. Calling API would incorrectly not fail even though frame queue nelts can only be set before first call nat44_plugin_enable. Moved all formatting functions to _format.c file. Type: refactor Change-Id: I3ca16e0568f8d7eee3a27c3620ca36164833a7e4 Signed-off-by: Filip Varga <fivarga@cisco.com>
2022-03-23vppinfra: change vlib_register_node so it takes format string for node nameDamjan Marion1-1/+2
This allows specifying both c string and vector for node name and removes need for crafting temporary string. Type: improvement Change-Id: I0b016cd70aeda0f68eb6f9171c5152f303be7369 Signed-off-by: Damjan Marion <damarion@cisco.com>
2022-03-17nat: fix ICMP error translationKlement Sekera1-0/+3
Add missing translation of ICMP inner IP layer. Change responsible test so that it actually tests something. Type: fix Fixes: 4881cb4c6f Signed-off-by: Klement Sekera <klement.sekera@gmail.com> Change-Id: Id3a6f12a7308d81b1cdf9815f857221fab2f24d9
2022-03-09stats: refactorDamjan Marion2-13/+7
Type: refactor Change-Id: Ifd533a095d979dc55bfbe5fac7e0b7510a4d900c Signed-off-by: Damjan Marion <damarion@cisco.com>
2022-02-21nat: make tcp/udp/icmp packet counters consistentKlement Sekera2-4/+12
TCP/UDP packets which are dropped are not counted towards TCP/UDP counters. Apply same behaviour to ICMP packets. Type: improvement Signed-off-by: Klement Sekera <klement.sekera@gmail.com> Change-Id: I487fa7135ac8e49431a621fac213638d2dab31c8
2022-02-15tcp: Do not include the tcp_packet.h file in the ip4_packet.hNeale Ranns2-0/+2
Type: refactor IP4 does not depend on TCP (it's the other way around). This upside down dependency leads to some nasty circular includes when trying to use ip46_address.h in interface.h Signed-off-by: Neale Ranns <neale@graphiant.com> Change-Id: I4a1bd21543b08b9c1cf1e5563da738414734a878
2022-02-03ip nat: use ip rx sw_if_index in ip-local arc startFlorin Coras1-7/+31
This also changes the behavior of the nat44-ei hairpinning feature. Rather then enabling the feature on every nat interface, it is enabled only on local0. Type: improvement Signed-off-by: Filip Varga <fivarga@cisco.com> Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: I4e16a83c9e328aa75fc61df508b620ef743ca775
2022-02-01nat: memory leak on nat44_plugin_disableSteven Luong1-0/+2
We invoke nat_affinity_enable for nat44_plugin_enable. We need to invoke nat_affinity_disable for nat44_plugin_disable to free the memory for bihash. Type: fix Fixes: I2743f7b1104b627bcc5ef937e3a50655313a26ea Signed-off-by: Steven Luong <sluong@cisco.com> Change-Id: I9adeb3225136e3fff853c2d5b8f9a30e98ddcf4c
2022-02-01nat: nat44-ei hairpinning code cleanupFilip Varga7-1547/+673
Removing obsolete unused nat44-ei nodes and functions. Type: refactor Change-Id: I1e03e283091c3c0d92908d04037cba00a348351a Signed-off-by: Filip Varga <fivarga@cisco.com>
2022-01-24nat: TCP state tracking based on RFC 7857/RFC 6146Klement Sekera10-332/+589
Implement proper state machine based on above RFCs. ACKs to SYNs/FINs are no longer required/tracked. This is more friendly to peers and accounts for lost packets and retransmits. This change also means that all traffic is translated and forwarded while in transitory timeout, which helps delivering e.g. retransmitted FINs, FINACKs and other messages. Also support reopening a session in transitory timeout after seeing both FINs by seeing both SYNs again. This helps quick connection reestablishment if the peers want to. Type: improvement Signed-off-by: Klement Sekera <ksekera@cisco.com> Signed-off-by: Miklos Tirpak <miklos.tirpak@gmail.com> Change-Id: Ibf521c79463472db97e593bfa02b32b4a06dfd2a
2022-01-04nat: remove nat44-ed relation between SM and addrFilip Varga6-555/+436
Change [1] put static mappings in flow hash. This change also broke relationship between nat pool addresses and static mappings. Port and address are no longer reserved in nat pool address records for a new static mapping. Because of this change both nat objects and their configuration can function independently. This change also removed already broken logic of having static-mapping-only configuration. In this patch i have cleaned up and removed unnecessary logic for static mapping configuration functions, address configuration functions, interface configuraiton functions and all callback functions used for resolving interface address bound records. No more viable configuration option static-mapping-only is also removed because there is no more option to run traffic through vpp for static mappings without having flow hash table allocated. Instead user is now able to create static mapping records without using nat pool addresses. Fixed and improved management of required fib entries (ensuring VPP will reply to ARP for all external addresses on outside interfaces) through holding a refcount for their creation and removal. [1] https://gerrit.fd.io/r/c/vpp/+/34077 Type: improvement Change-Id: Ic16deefbede833d574c2a5972155c9afa5bc62ce Signed-off-by: Filip Varga <fivarga@cisco.com>
2022-01-04nat: nat44-ed pool address allocation improvementFilip Varga4-58/+289
This patch improves algorithm responsible for choosing nat pool address during dynamic session creation. Patch synchronizes nat pool address attributes with vpp interfaces doing so gives nat option to determine correct nat pool address when creating dynamic session. Improvements: * match dst address subnet and src fib with nat pool address * for output-feature also fallback match of tx_sw_if_index with nat pool address Type: improvement Change-Id: I594638bc76fc1153f582add376838b4b72ff573a Signed-off-by: Filip Varga <fivarga@cisco.com>
2021-11-26api: add helper macros for native endianMohsin Kazmi3-20/+4
Type: improvement Change-Id: Ifa074dfd337f9cd68858468d34abf641fe7f247f Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
2021-11-22ipfix-export: Change exp to use ip_addressPaul Atkins1-4/+4
Modify the ipfix_exporter to use ip_address instead of the ipv4 specific version. Modify the current code so that it writes into the v4 specific part of the address, i.e. we are not yet fully supporting IPv6. For the exporter configured via the original API (the one that is always in slot0) we will not support IPv6 addresses. Type: improvement Signed-off-by: Paul Atkins <patkins@graphiant.com> Change-Id: Ic9854ac62aaee76a7a55a958234c456fd9828c4c
2021-11-22ipfix-export: refactor params to the callback fnsPaul Atkins1-31/+16
When a new flow-report is created the caller provides 2 callback functions. These functions both take a pointer to the exporter, plus a pointer to the source and dest address. However the pointers to the address are not adding any value as these are always set to the src/dest addresses of the exporter (which is already being passed). Remove these parameters and leave the callback functions to get the addresses out of the exporter. Type: improvement Signed-off-by: Paul Atkins <patkins@graphiant.com> Change-Id: I36dec394f30e85cdca120dd8706b5d90f5e07c48
2021-11-22ipfix-export: pass an exp to flow_report_add_delPaul Atkins1-83/+69
Pass an ipfix_exporter to this function so that callers can choose which exporter they are modifying. Type: improvement Signed-off-by: Paul Atkins <patkins@graphiant.com> Change-Id: Ice0ed19a57baf15b1dc85cd27fe01913e36d7f4f
2021-11-22ipfix-export: refactor fields in flow_report_mainPaul Atkins1-23/+30
Pull out the fields in flow_report_main_t that are specific to a single exporter and move them into a new structure that represents an exporter. Add a pool of exporters to flow_report_main_t and do a pool_get() to get the entry at index 0, so that the existing users of the code need only change the path at which they access the old fields and have no need to make further code changes. In functions that were accessing the fields that now make up the ipfix_exporter create a local var that points to the first (always valid) exporter and use this as the base for the fields rather than finding them from flow_report_main. This is in preparation for supporting multiple flow_exporters. Note that at the moment the code supports multiple 'streams' for a given exporter, where each stream has its own source port, domain id and template space. But all streams within an exporter have the same destination address, so this is not the same as multiple exporters. Type: refactor Signed-off-by: Paul Atkins <patkins@graphiant.com> Change-Id: I49f5c7fb9e901773351d31dc8a59178c37e99301
2021-11-17nat: VPP crashes when route is not reachableDaniel Béreš1-0/+3
The problem was reproducible only with icmp packet type when det44 in, out interfaces were swapped. Dst addr was unknown but packet has been forwarded. Type: fix Ticket: VPP-1958 Signed-off-by: Daniel Béreš <daniel.beres@pantheon.tech> Change-Id: Ie446cf2ac866955cc668fe2848f954a2ef92e3fa
2021-11-17nat: det44 plugin session scavenging fixFilip Varga1-15/+27
det44 plugin process node would only run once on the first plugin enable call. this patch ads the required calls into while loop in the process node funciton. Type: fix Change-Id: I38c94b29fd1e2c842a1330e8628e3019f23f2b69 Signed-off-by: Filip Varga <fivarga@cisco.com>
2021-11-11tests: make code coverage for unit tests optionalOle Troan1-1/+1
Add a new cmake option VPP_BUILD_TESTS_WITH_COVERAGE to enable building unittests with clang code coverage. Type: improvement Signed-off-by: Ole Troan <ot@cisco.com> Change-Id: I9cbe9e3031afdcd03bc8f9203d662b91677724ab Signed-off-by: Ole Troan <ot@cisco.com>