diff options
| author |   qinyang <qiny@yusur.tech> | 2023-06-27 01:11:53 -0700 |
|---|---|---|
| committer |   Florin Coras <florin.coras@gmail.com> | 2023-07-21 16:27:14 +0000 |
| commit | af9b7156c8fd16c671ce9332613faaf864b075b3 (patch) | |
| tree | 201f45dacba23771db635c563b34315b6594d4af /src/plugins/nat | |
| parent | ae916b39049669bbada12dbcfecbb4e3f9c09c69 (diff) | |
vcl: ldp support SO_ORIGINAL_DST
Type: improvement
Support SO_ORIGINAL_DST socket option to get original dst_ip4 and dst_port if nat44 rule enabled.
Change-Id: If00e00d03e48f3b78a23a68f1b078954d79dd0f7
Signed-off-by: qinyang <qiny@yusur.tech>
Diffstat (limited to 'src/plugins/nat')
| -rw-r--r-- | src/plugins/nat/nat44-ed/nat44_ed.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/plugins/nat/nat44-ed/nat44_ed.c b/src/plugins/nat/nat44-ed/nat44_ed.c index 2ccd461d271..74359ccf8ee 100644 --- a/src/plugins/nat/nat44-ed/nat44_ed.c +++ b/src/plugins/nat/nat44-ed/nat44_ed.c @@ -4104,7 +4104,49 @@ nat_syslog_nat44_sdel (u32 ssubix, u32 sfibix, ip4_address_t *isaddr, idaddr, idport, xdaddr, xdport, proto, 0, is_twicenat); } +__clib_export void +nat44_original_dst_lookup (ip4_address_t *i2o_src, u16 i2o_src_port, + ip4_address_t *i2o_dst, u16 i2o_dst_port, + ip_protocol_t proto, u32 *original_dst, + u16 *original_dst_port) +{ + snat_main_per_thread_data_t *tsm; + snat_main_t *sm = &snat_main; + u32 fib_index = 0; + snat_session_t *s; + ip4_header_t ip; + + ip.src_address.as_u32 = i2o_src->as_u32; + fib_index = fib_table_find (FIB_PROTOCOL_IP4, 0); + if (sm->num_workers > 1) + { + tsm = vec_elt_at_index ( + sm->per_thread_data, + nat44_ed_get_in2out_worker_index (0, &ip, fib_index, 0)); + } + else + { + tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers); + } + + /* query */ + clib_bihash_kv_16_8_t kv = { 0 }, value; + init_ed_k (&kv, i2o_src->as_u32, i2o_src_port, i2o_dst->as_u32, i2o_dst_port, + fib_index, proto); + if (tsm->sessions == NULL || + clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value)) + { + return; + } + s = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (&value)); + if (s) + { + *original_dst = s->i2o.rewrite.saddr.as_u32; + *original_dst_port = s->i2o.rewrite.sport; + } + return; +} /* * fd.io coding-style-patch-verification: ON * |