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vlib: Punt reason allocation listener enable/disable callback

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Type: improvement

allow clients that allocate punt reasons to pass a callback function
that is invoked when the first/last client registers to use/listen on
that punt reason. This allows the client to perform some necessary
configs that might not otherwise be enabled.
IPSec uses this callback to register the ESP proto and UDP handling
nodes, that would not otherwise be enabled unless a tunnel was present.

Change-Id: I9759349903f21ffeeb253d4271e619e6bf46054b
Signed-off-by: Neale Ranns <nranns@cisco.com>
This commit is contained in:
Neale Ranns
2020-02-20 09:45:16 +00:00
parent 719ef39d98
commit 8d6d74cdf4
9 changed files with 158 additions and 53 deletions
Download Patch File Download Diff File Expand all files Collapse all files

60
test/test_punt.py
View File

@ -793,30 +793,6 @@ class TestExceptionPuntSocket(TestPuntSocket):
}
}
#
# we need an IPSec tunnels for this to work otherwise ESP gets dropped
# due to unknown IP proto
#
VppIpsecTunInterface(self, self.pg0, 1000, 1000,
(VppEnum.vl_api_ipsec_crypto_alg_t.
IPSEC_API_CRYPTO_ALG_AES_CBC_128),
b"0123456701234567",
b"0123456701234567",
(VppEnum.vl_api_ipsec_integ_alg_t.
IPSEC_API_INTEG_ALG_SHA1_96),
b"0123456701234567",
b"0123456701234567").add_vpp_config()
VppIpsecTunInterface(self, self.pg1, 1000, 1000,
(VppEnum.vl_api_ipsec_crypto_alg_t.
IPSEC_API_CRYPTO_ALG_AES_CBC_128),
b"0123456701234567",
b"0123456701234567",
(VppEnum.vl_api_ipsec_integ_alg_t.
IPSEC_API_INTEG_ALG_SHA1_96),
b"0123456701234567",
b"0123456701234567",
udp_encap=True).add_vpp_config()
#
# we're dealing with IPSec tunnels punting for no-such-tunnel
# adn SPI=0
@ -880,6 +856,42 @@ class TestExceptionPuntSocket(TestPuntSocket):
cfg['spi'], cfg['udp'])
#
# add some tunnels, make sure it still punts
#
VppIpsecTunInterface(self, self.pg0, 1000, 1000,
(VppEnum.vl_api_ipsec_crypto_alg_t.
IPSEC_API_CRYPTO_ALG_AES_CBC_128),
b"0123456701234567",
b"0123456701234567",
(VppEnum.vl_api_ipsec_integ_alg_t.
IPSEC_API_INTEG_ALG_SHA1_96),
b"0123456701234567",
b"0123456701234567").add_vpp_config()
VppIpsecTunInterface(self, self.pg1, 1000, 1000,
(VppEnum.vl_api_ipsec_crypto_alg_t.
IPSEC_API_CRYPTO_ALG_AES_CBC_128),
b"0123456701234567",
b"0123456701234567",
(VppEnum.vl_api_ipsec_integ_alg_t.
IPSEC_API_INTEG_ALG_SHA1_96),
b"0123456701234567",
b"0123456701234567",
udp_encap=True).add_vpp_config()
#
# send packets for each SPI we expect to be punted
#
for cfg in cfgs.values():
self.send_and_assert_no_replies(cfg['itf'], cfg['pkts'])
#
# verify the punted packets arrived on the associated socket
#
for cfg in cfgs.values():
rx = cfg['sock'].close()
self.verify_esp_pkts(rx, len(cfg['pkts']),
cfg['spi'], cfg['udp'])
#
# socket deregister
#
for cfg in cfgs.values():