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Change-Id: I39a3146a4e4ba8eadf50af7113b9ae6b1c1d688f
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Compute ICMP checksum for buffer chains
Fix checksum function for buffer chains
Change-Id: I39b845b94a63c3ab5fc9f6f9ab36cadbc67c104f
Signed-off-by: Juraj Sloboda <jsloboda@cisco.com>
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Change-Id: Ia3ce24cc94f9b2fb331ad62a4181ddcd41bc78ca
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: I36ece2ef2eaef9fa559d69ec7f7f07e7c16a7a9d
Signed-off-by: Juraj Sloboda <jsloboda@cisco.com>
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NAT plugin changes the MSS value in TCP SYN packets to avoid fragmentation.
If the negotiated MSS value is greater than the configured value it is changed
to the configured value. If the negotiated MSS value is smaller than the
configured value it remains unchanged.
Change-Id: Ic3c4f94a2f1b76e2bf79f50f3ad36a4097f3f188
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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All fragments should be dropped when max_frag is 1 and 2 non-initial fragments are received before first fragment.
Change-Id: Id0c968f45629698e347e8226c5926f27b48b82d6
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Enable client-IP based session affinity per LB NAT rule with specific timeout.
Change-Id: I9aade152e330218d21dfda99cc5e984d769ab806
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: I44acc5aeff59dc25d18369e29618bbe39d30a1b3
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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NAT44 (vanilla/simple and endpoint-dependent mode) now lazily delete expired
sessions. When inserting to session lookup hash and bucket is full, expired
session is overwritten.
Change-Id: Ib1b34959f60f0ca4f5b13525b1d41dd2f992288d
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: I756e3ad3de9ffe1494221ef95c1943c8591f8f50
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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It is cheaper to get thread index from vlib_main_t if available...
Change-Id: I4582e160d06d9d7fccdc54271912f0635da79b50
Signed-off-by: Damjan Marion <damarion@cisco.com>
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Change-Id: I56eb15f8fd2d3049845287dc3df7870582764f8b
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: Iddb0b848c53da03116524e203c7112c82b401ac5
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: Ib1e4563dbc027571c77497e5c190201713adc72b
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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To enable NAT plugin endpoint dependent mode add following to statrup config:
nat { endpoint-dependent }
Enable endpoint dependent filtering and mapping for all sessions.
Move some existing functionality such as service load balancing, twice nat,
out2in-only static mappings and unknown protocol dynamic translations, which
use endpoint dependent lookup hash tables before. Basically split to vanilla
NAT44 and extra features NAT44.
Change-Id: I3925eb5ddcc8f1ec4cf6af4e2a618a7ec7aa9735
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: I088163f10ae5515d7a9115781cc13ef563fafed5
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: I484d79000c1bbd87ff83847cf567bf3414a719d3
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: Id25b447bddccb7b321123e4abc4134e7261a0807
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: Iba1cc1179ee80478e29888790a6476571d1904dc
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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When a packet with an unknown proto arrives
on an inside interface and there are no existing sessions
for the source address, a segv occurs.
snat_in2out_unknown_proto() finds the head of the sessions
dlist, fetches the address of the next element using
head->next, and then dereferences the next element. On the
first packet received from a source address, head->next is
~0, so this results in a segv.
Check that the session list is not empty before trying to
traverse it.
Also removed unnecessary lookup against tsm->user_hash.
Prior call to nat_user_get_or_create() already performed
that lookup and added a user if one didn't exist.
Change-Id: If73e79aa2f8e3962ab7b876ecf55aea40d7a5472
Signed-off-by: Matthew Smith <mgsmith@netgate.com>
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When enabled then Twice-NAT is applied only when
source IP equals destination IP after DNAT
Change-Id: I58a9d1d222b2a10c83eafffb2107f32c1b4aa3a8
Signed-off-by: Juraj Sloboda <jsloboda@cisco.com>
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Change-Id: I7e6b0e7e91cc032b1685f35de5d84363a85158a5
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: Ieeafb41d10959700bfd434cd455800af31944150
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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When a user session is allocated/reused, only increase
one of the session counters for that user if the counters
are below the per-user limit.
THis addresses a SEGV that arises after the following
sequence of events:
- an outside interface IP address is put in a pool
- a user exceeds the number of per-user translations by
an amount greater than the number of per-user translations
(nsessions + nstaticsessions > 100 + 100)
- the outside interface IP address is deleted and then added
again (observed when using DHCP client, likely happens if
address changed via CLI, API also)
- the user sends more packets that should be translated
When nsessions is > the per-user limit,
nat_session_alloc_or_recycle() reclaims the oldest existing
user session. When an outside address is deleted, the
corresponding user sessions are deleted. If the counters were
far above the per-user limit, the deletions wouldn't result
in the counters dropping back below the limit. So no session
could be reclaimed -> SEGV.
Change-Id: I940bafba0fd5385a563e2ce87534688eb9469f12
Signed-off-by: Matthew Smith <mgsmith@netgate.com>
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Change-Id: I3e4bbfe205c86cb0839dd5c542f083dbe6bea881
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Do not translate packet which go out via nat44-in2out-output and was tranlated
in nat44-out2in before. On way back forward packet to nat44-in2out node.
Change-Id: I934d69856f0178c86ff879bc691c9e074b8485c8
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: Icb858414145db0e5fef495e155903b3b935e50ba
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: I1552e1418b704fdf1f1fa2c0174313b9b82a37a3
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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in2out and out2in protocol are not same
Change-Id: I4ce680ad1f088cb079e1f2aeb15ca59225fca0d1
Signed-off-by: ahdj007 <dong.juan1@zte.com.cn>
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forwarding mode:
session initiaded from service host - translate
session initiaded from remote host - do not translate
Change-Id: I48170ee8e4ad14d3d3083ee31a40ef8d10d6ff32
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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(VPP-1156)
Change-Id: I5395245c9e49f741a949ada1f725c34f9379c249
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: I85c799f28c4246884107e569a36482af10d9be9d
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Add option to NAT44 load balancing static mapping API/CLI to make rule asymmetrical (rule match only in out2in direction).
Change-Id: I325ecef5591e4bf44ce4469a24d44fe56c3bb2e9
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: Ib90dc5613c9fdac0344b3bd7f163e2f7163c64d8
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: I24e7a26972bbbfcea100292b212b29ae7a349335
Signed-off-by: Juraj Sloboda <jsloboda@cisco.com>
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Add API function which enables forwarding of packets not matching
existing translation or static mapping instead of dropping them.
When forwarding is enabled matching packets will be translated
while non-matching packets will be forwarded without translation.
Change-Id: Ic13040cbad16d3a1ecdc3e02a497171bef6aa413
Signed-off-by: Juraj Sloboda <jsloboda@cisco.com>
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Translation of both source and destination addresses and ports for 1:1 NAT
session initiated from outside network (ExternalIP K8 use case).
Change-Id: Ic0000497cf71619aac996d6d580844f0ea0edc14
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: Iebf859b6d86482e4465423bad598eecf87e53ec4
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: Iae2f9f9652cecdf7e754700b2fe107ad61ff8ff9
Signed-off-by: Juraj Sloboda <jsloboda@cisco.com>
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Translation of fragmented packets.
Change-Id: I9b1f2e9433ce273638080f32c2d3bff39c49899d
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Dual-Stack Lite enables a broadband service provider to share IPv4 addresses among customers by combining two well-known technologies: IPv4-in-IPv6 and NAT.
Change-Id: I039740f8548c623cd1ac89b8ecda1a6cc4aafb9c
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Use a single physical interface in order to accomplish NAT44/NAT64.
Change-Id: I0c8138953a7a4075df306172e125abad771315e4
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: I7c6911cd6ac366fe62675fd0ff8b0246a25ea1db
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: Ie3245b96c511cc30915e70e8c881f445291a38c2
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: I7f18f8c4ba609d96950dc1f833feb967d4a099b7
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: Ibcd2cf22348ae5a72770a8f8ad25cbe8df7fd390
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Change-Id: I41a51bb36e31e05c76fef0b34fe006afbee27729
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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in order to trace session_index
Change-Id: I4433155fbe21635f8a997523e2c7900c6a7569af
Signed-off-by: dongjuan <dong.juan1@zte.com.cn>
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Change-Id: I6c5eccd4193c44604da3fd27c108defe71b38a4b
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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Test whether the hairpinning flag is set only for packets from NAT inside interface.
Change-Id: I4a4fdd2084a76a70ce9dfe3e2b8332c02fa2eccd
Signed-off-by: Matus Fabian <matfabia@cisco.com>
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