diff options
Diffstat (limited to 'src/vnet/ipsec/ipsec_tun.c')
| -rw-r--r-- | src/vnet/ipsec/ipsec_tun.c | 567 |
1 files changed, 472 insertions, 95 deletions
diff --git a/src/vnet/ipsec/ipsec_tun.c b/src/vnet/ipsec/ipsec_tun.c index f6b09d65f2c..769229721f6 100644 --- a/src/vnet/ipsec/ipsec_tun.c +++ b/src/vnet/ipsec/ipsec_tun.c @@ -18,29 +18,92 @@ #include <vnet/ipsec/ipsec_tun.h> #include <vnet/ipsec/esp.h> #include <vnet/udp/udp.h> +#include <vnet/adj/adj_delegate.h> +#include <vnet/teib/teib.h> + +/** + * The logger + */ +vlib_log_class_t ipsec_tun_protect_logger; /** * Pool of tunnel protection objects */ -ipsec_tun_protect_t *ipsec_protect_pool; +ipsec_tun_protect_t *ipsec_tun_protect_pool; + +/** + * Adj delegate registered type + */ +static adj_delegate_type_t ipsec_tun_adj_delegate_type; + +/** + * Adj index to TX SA mapping + */ +index_t *ipsec_tun_protect_sa_by_adj_index; + +const ip_address_t IP_ADDR_ALL_0 = IP_ADDRESS_V4_ALL_0S; /** - * DB of protected tunnels + * The DB of all added per-nh tunnel protectiond */ -typedef struct ipsec_protect_db_t_ +typedef struct ipsec_tun_protect_itf_db_t_ +{ + /** A hash table key'd on IP (4 or 6) address */ + uword *id_hash; + /** If the interface is P2P then there is only one protect + * object associated with the auto-adj for each NH proto */ + index_t id_itp; +} ipsec_tun_protect_itf_db_t; + +typedef struct ipsec_tun_protect_db_t_ { - u32 *tunnels; - u32 count; -} ipsec_protect_db_t; + /** Per-interface vector */ + ipsec_tun_protect_itf_db_t *id_itf; +} ipsec_tun_protect_db_t; + +static ipsec_tun_protect_db_t itp_db; + +const static ipsec_tun_protect_itf_db_t IPSEC_TUN_PROTECT_DEFAULT_DB_ENTRY = { + .id_itp = INDEX_INVALID, +}; + +#define ITP_DBG(_itp, _fmt, _args...) \ +{ \ + vlib_log_debug(ipsec_tun_protect_logger, \ + "[%U]: " _fmt, \ + format_ipsec_tun_protect, \ + _itp, ##_args); \ +} -static ipsec_protect_db_t ipsec_protect_db; +#define ITP_DBG2(_fmt, _args...) \ +{ \ + vlib_log_debug(ipsec_tun_protect_logger, \ + _fmt, ##_args); \ +} static void -ipsec_tun_protect_feature_set (ipsec_tun_protect_t * itp, u8 enable) +ipsec_tun_protect_add_adj (adj_index_t ai, index_t sai) { - u32 sai; + vec_validate_init_empty (ipsec_tun_protect_sa_by_adj_index, ai, + INDEX_INVALID); + + ipsec_tun_protect_sa_by_adj_index[ai] = sai; +} + +static inline const ipsec_tun_protect_t * +ipsec_tun_protect_from_const_base (const adj_delegate_t * ad) +{ + if (ad == NULL) + return (NULL); + return (pool_elt_at_index (ipsec_tun_protect_pool, ad->ad_index)); +} - sai = itp->itp_out_sa; +static void +ipsec_tun_protect_feature_set (ipsec_tun_protect_t * itp, u8 enable) +{ + ITP_DBG2 ("%s on %U", (enable ? "enable" : "disable"), + format_vnet_sw_if_index_name, vnet_get_main (), + itp->itp_sw_if_index); if (itp->itp_flags & IPSEC_PROTECT_L2) { @@ -49,16 +112,16 @@ ipsec_tun_protect_feature_set (ipsec_tun_protect_t * itp, u8 enable) (ip46_address_is_ip4 (&itp->itp_tun.src) ? "esp4-encrypt-tun" : "esp6-encrypt-tun"), - itp->itp_sw_if_index, enable, - &sai, sizeof (sai)); + itp->itp_sw_if_index, enable, NULL, 0); } else { + u32 fi4, fi6, sai; ipsec_main_t *im; ipsec_sa_t *sa; - u32 fi4, fi6; im = &ipsec_main; + sai = itp->itp_out_sa; sa = ipsec_sa_get (sai); if (sa->crypto_alg == IPSEC_CRYPTO_ALG_NONE && @@ -85,26 +148,52 @@ ipsec_tun_protect_feature_set (ipsec_tun_protect_t * itp, u8 enable) vnet_feature_enable_disable_with_index (vnet_get_feature_arc_index ("ip4-output"), - fi4, itp->itp_sw_if_index, enable, &sai, sizeof (sai)); + fi4, itp->itp_sw_if_index, enable, NULL, 0); vnet_feature_enable_disable_with_index (vnet_get_feature_arc_index ("ip6-output"), - fi6, itp->itp_sw_if_index, enable, &sai, sizeof (sai)); + fi6, itp->itp_sw_if_index, enable, NULL, 0); + } +} + +static index_t +ipsec_tun_protect_find (u32 sw_if_index, const ip_address_t * nh) +{ + ipsec_tun_protect_itf_db_t *idi; + uword *p; + + if (vec_len (itp_db.id_itf) <= sw_if_index) + return INDEX_INVALID; + + if (vnet_sw_interface_is_p2p (vnet_get_main (), sw_if_index)) + return (itp_db.id_itf[sw_if_index].id_itp); + + idi = &itp_db.id_itf[sw_if_index]; + p = hash_get_mem (idi->id_hash, nh); + + if (NULL == p) + { + return INDEX_INVALID; } + return (p[0]); } static void -ipsec_tun_protect_db_add (ipsec_main_t * im, const ipsec_tun_protect_t * itp) +ipsec_tun_protect_rx_db_add (ipsec_main_t * im, + const ipsec_tun_protect_t * itp) { const ipsec_sa_t *sa; u32 sai; + if (ip46_address_is_zero (&itp->itp_crypto.dst)) + return; + /* *INDENT-OFF* */ FOR_EACH_IPSEC_PROTECT_INPUT_SAI(itp, sai, ({ sa = ipsec_sa_get (sai); ipsec_tun_lkup_result_t res = { - .tun_index = itp - ipsec_protect_pool, + .tun_index = itp - ipsec_tun_protect_pool, .sa_index = sai, }; @@ -120,9 +209,13 @@ ipsec_tun_protect_db_add (ipsec_main_t * im, const ipsec_tun_protect_t * itp) }; hash_set (im->tun4_protect_by_key, key.as_u64, res.as_u64); if (1 == hash_elts(im->tun4_protect_by_key)) - udp_register_dst_port (vlib_get_main(), - UDP_DST_PORT_ipsec, - ipsec4_tun_input_node.index, 1); + { + udp_register_dst_port (vlib_get_main(), + UDP_DST_PORT_ipsec, + ipsec4_tun_input_node.index, 1); + ip4_register_protocol (IP_PROTOCOL_IPSEC_ESP, + ipsec4_tun_input_node.index); + } } else { @@ -131,14 +224,83 @@ ipsec_tun_protect_db_add (ipsec_main_t * im, const ipsec_tun_protect_t * itp) .spi = clib_host_to_net_u32 (sa->spi), }; hash_set_mem_alloc (&im->tun6_protect_by_key, &key, res.as_u64); + + if (1 == hash_elts (im->tun6_protect_by_key)) + ip6_register_protocol (IP_PROTOCOL_IPSEC_ESP, + ipsec6_tun_input_node.index); } })) /* *INDENT-ON* */ } +static adj_walk_rc_t +ipsec_tun_protect_adj_add (adj_index_t ai, void *arg) +{ + ipsec_tun_protect_t *itp = arg; + adj_delegate_add (adj_get (ai), ipsec_tun_adj_delegate_type, + itp - ipsec_tun_protect_pool); + ipsec_tun_protect_add_adj (ai, itp->itp_out_sa); + + return (ADJ_WALK_RC_CONTINUE); +} + static void -ipsec_tun_protect_db_remove (ipsec_main_t * im, - const ipsec_tun_protect_t * itp) +ipsec_tun_protect_tx_db_add (ipsec_tun_protect_t * itp) +{ + /* + * add the delegate to the adj + */ + ipsec_tun_protect_itf_db_t *idi; + fib_protocol_t nh_proto; + ip46_address_t nh; + + vec_validate_init_empty (itp_db.id_itf, + itp->itp_sw_if_index, + IPSEC_TUN_PROTECT_DEFAULT_DB_ENTRY); + + idi = &itp_db.id_itf[itp->itp_sw_if_index]; + + if (vnet_sw_interface_is_p2p (vnet_get_main (), itp->itp_sw_if_index)) + { + if (INDEX_INVALID == idi->id_itp) + { + ipsec_tun_protect_feature_set (itp, 1); + } + idi->id_itp = itp - ipsec_tun_protect_pool; + + FOR_EACH_FIB_IP_PROTOCOL (nh_proto) + adj_nbr_walk (itp->itp_sw_if_index, + nh_proto, ipsec_tun_protect_adj_add, itp); + } + else + { + if (NULL == idi->id_hash) + { + idi->id_hash = + hash_create_mem (0, sizeof (ip_address_t), sizeof (uword)); + /* + * enable the encrypt feature for egress if this is the first addition + * on this interface + */ + ipsec_tun_protect_feature_set (itp, 1); + } + + hash_set_mem (idi->id_hash, itp->itp_key, itp - ipsec_tun_protect_pool); + + /* + * walk all the adjs with the same nh on this interface + * to associate them with this protection + */ + nh_proto = ip_address_to_46 (itp->itp_key, &nh); + + adj_nbr_walk_nh (itp->itp_sw_if_index, + nh_proto, &nh, ipsec_tun_protect_adj_add, itp); + } +} + +static void +ipsec_tun_protect_rx_db_remove (ipsec_main_t * im, + const ipsec_tun_protect_t * itp) { const ipsec_sa_t *sa; @@ -169,26 +331,56 @@ ipsec_tun_protect_db_remove (ipsec_main_t * im, /* *INDENT-ON* */ } +static adj_walk_rc_t +ipsec_tun_protect_adj_remove (adj_index_t ai, void *arg) +{ + adj_delegate_remove (ai, ipsec_tun_adj_delegate_type); + ipsec_tun_protect_add_adj (ai, INDEX_INVALID); + + return (ADJ_WALK_RC_CONTINUE); +} + static void -ipsec_tun_protect_config (ipsec_main_t * im, - ipsec_tun_protect_t * itp, u32 sa_out, u32 * sas_in) +ipsec_tun_protect_tx_db_remove (ipsec_tun_protect_t * itp) { - ipsec_sa_t *sa; - index_t sai; - u32 ii; + ipsec_tun_protect_itf_db_t *idi; + fib_protocol_t nh_proto; + ip46_address_t nh; - itp->itp_n_sa_in = vec_len (sas_in); - for (ii = 0; ii < itp->itp_n_sa_in; ii++) - itp->itp_in_sas[ii] = sas_in[ii]; - itp->itp_out_sa = sa_out; + nh_proto = ip_address_to_46 (itp->itp_key, &nh); + idi = &itp_db.id_itf[itp->itp_sw_if_index]; - ipsec_sa_lock (itp->itp_out_sa); + if (vnet_sw_interface_is_p2p (vnet_get_main (), itp->itp_sw_if_index)) + { + ipsec_tun_protect_feature_set (itp, 0); + idi->id_itp = INDEX_INVALID; + + FOR_EACH_FIB_IP_PROTOCOL (nh_proto) + adj_nbr_walk (itp->itp_sw_if_index, + nh_proto, ipsec_tun_protect_adj_remove, itp); + } + else + { + adj_nbr_walk_nh (itp->itp_sw_if_index, + nh_proto, &nh, ipsec_tun_protect_adj_remove, itp); + + hash_unset_mem (idi->id_hash, itp->itp_key); + + if (0 == hash_elts (idi->id_hash)) + { + ipsec_tun_protect_feature_set (itp, 0); + hash_free (idi->id_hash); + idi->id_hash = NULL; + } + } +} + +static void +ipsec_tun_protect_set_crypto_addr (ipsec_tun_protect_t * itp) +{ + ipsec_sa_t *sa; /* *INDENT-OFF* */ - FOR_EACH_IPSEC_PROTECT_INPUT_SAI(itp, sai, - ({ - ipsec_sa_lock(sai); - })); FOR_EACH_IPSEC_PROTECT_INPUT_SA(itp, sa, ({ if (ipsec_sa_is_set_IS_TUNNEL (sa)) @@ -206,16 +398,37 @@ ipsec_tun_protect_config (ipsec_main_t * im, } })); /* *INDENT-ON* */ +} + +static void +ipsec_tun_protect_config (ipsec_main_t * im, + ipsec_tun_protect_t * itp, u32 sa_out, u32 * sas_in) +{ + index_t sai; + u32 ii; + + itp->itp_n_sa_in = vec_len (sas_in); + for (ii = 0; ii < itp->itp_n_sa_in; ii++) + itp->itp_in_sas[ii] = sas_in[ii]; + itp->itp_out_sa = sa_out; + + ipsec_sa_lock (itp->itp_out_sa); + + /* *INDENT-OFF* */ + FOR_EACH_IPSEC_PROTECT_INPUT_SAI(itp, sai, + ({ + ipsec_sa_lock(sai); + })); + ipsec_tun_protect_set_crypto_addr(itp); + /* *INDENT-ON* */ /* * add to the DB against each SA */ - ipsec_tun_protect_db_add (im, itp); + ipsec_tun_protect_rx_db_add (im, itp); + ipsec_tun_protect_tx_db_add (itp); - /* - * enable the encrypt feature for egress. - */ - ipsec_tun_protect_feature_set (itp, 1); + ITP_DBG (itp, "configured"); } static void @@ -224,15 +437,14 @@ ipsec_tun_protect_unconfig (ipsec_main_t * im, ipsec_tun_protect_t * itp) ipsec_sa_t *sa; index_t sai; - ipsec_tun_protect_feature_set (itp, 0); - /* *INDENT-OFF* */ FOR_EACH_IPSEC_PROTECT_INPUT_SA(itp, sa, ({ ipsec_sa_unset_IS_PROTECT (sa); })); - ipsec_tun_protect_db_remove (im, itp); + ipsec_tun_protect_rx_db_remove (im, itp); + ipsec_tun_protect_tx_db_remove (itp); ipsec_sa_unlock(itp->itp_out_sa); @@ -241,31 +453,25 @@ ipsec_tun_protect_unconfig (ipsec_main_t * im, ipsec_tun_protect_t * itp) ipsec_sa_unlock(sai); })); /* *INDENT-ON* */ -} - -index_t -ipsec_tun_protect_find (u32 sw_if_index) -{ - if (vec_len (ipsec_protect_db.tunnels) < sw_if_index) - return (INDEX_INVALID); - - return (ipsec_protect_db.tunnels[sw_if_index]); + ITP_DBG (itp, "unconfigured"); } int -ipsec_tun_protect_update_one (u32 sw_if_index, u32 sa_out, u32 sa_in) +ipsec_tun_protect_update_one (u32 sw_if_index, + const ip_address_t * nh, u32 sa_out, u32 sa_in) { u32 *sas_in = NULL; int rv; vec_add1 (sas_in, sa_in); - rv = ipsec_tun_protect_update (sw_if_index, sa_out, sas_in); + rv = ipsec_tun_protect_update (sw_if_index, nh, sa_out, sas_in); return (rv); } int -ipsec_tun_protect_update_out (u32 sw_if_index, u32 sa_out) +ipsec_tun_protect_update_out (u32 sw_if_index, + const ip_address_t * nh, u32 sa_out) { u32 itpi, *sas_in, sai, *saip; ipsec_tun_protect_t *itp; @@ -275,24 +481,22 @@ ipsec_tun_protect_update_out (u32 sw_if_index, u32 sa_out) sas_in = NULL; rv = 0; im = &ipsec_main; - vec_validate_init_empty (ipsec_protect_db.tunnels, sw_if_index, - INDEX_INVALID); - itpi = ipsec_protect_db.tunnels[sw_if_index]; + + itpi = ipsec_tun_protect_find (sw_if_index, nh); if (INDEX_INVALID == itpi) { return (VNET_API_ERROR_INVALID_INTERFACE); } - itp = pool_elt_at_index (ipsec_protect_pool, itpi); + itp = pool_elt_at_index (ipsec_tun_protect_pool, itpi); - /* *INDENT-0FF* */ - FOR_EACH_IPSEC_PROTECT_INPUT_SAI (itp, sai, ( - { - ipsec_sa_lock (sai); - vec_add1 (sas_in, sai); - } - )); + /* *INDENT-OFF* */ + FOR_EACH_IPSEC_PROTECT_INPUT_SAI (itp, sai, + ({ + ipsec_sa_lock (sai); + vec_add1 (sas_in, sai); + })); /* *INDENT-ON* */ sa_out = ipsec_sa_find_and_lock (sa_out); @@ -315,7 +519,8 @@ out: } int -ipsec_tun_protect_update_in (u32 sw_if_index, u32 sa_in) +ipsec_tun_protect_update_in (u32 sw_if_index, + const ip_address_t * nh, u32 sa_in) { u32 itpi, *sas_in, sa_out; ipsec_tun_protect_t *itp; @@ -325,9 +530,7 @@ ipsec_tun_protect_update_in (u32 sw_if_index, u32 sa_in) sas_in = NULL; rv = 0; im = &ipsec_main; - vec_validate_init_empty (ipsec_protect_db.tunnels, sw_if_index, - INDEX_INVALID); - itpi = ipsec_protect_db.tunnels[sw_if_index]; + itpi = ipsec_tun_protect_find (sw_if_index, nh); if (INDEX_INVALID == itpi) { @@ -343,7 +546,7 @@ ipsec_tun_protect_update_in (u32 sw_if_index, u32 sa_in) } vec_add1 (sas_in, sa_in); - itp = pool_elt_at_index (ipsec_protect_pool, itpi); + itp = pool_elt_at_index (ipsec_tun_protect_pool, itpi); sa_out = itp->itp_out_sa; ipsec_sa_lock (sa_out); @@ -358,19 +561,40 @@ out: return (rv); } +static void +ipsec_tun_protect_update_from_teib (ipsec_tun_protect_t * itp, + const teib_entry_t * ne) +{ + if (NULL != ne) + { + const fib_prefix_t *pfx; + + pfx = teib_entry_get_nh (ne); + + ip46_address_copy (&itp->itp_tun.dst, &pfx->fp_addr); + } + else + ip46_address_reset (&itp->itp_tun.dst); +} + int -ipsec_tun_protect_update (u32 sw_if_index, u32 sa_out, u32 * sas_in) +ipsec_tun_protect_update (u32 sw_if_index, + const ip_address_t * nh, u32 sa_out, u32 * sas_in) { ipsec_tun_protect_t *itp; u32 itpi, ii, *saip; ipsec_main_t *im; int rv; + ITP_DBG2 ("update: %U/%U", + format_vnet_sw_if_index_name, vnet_get_main (), sw_if_index, + format_ip_address, nh); + rv = 0; im = &ipsec_main; - vec_validate_init_empty (ipsec_protect_db.tunnels, sw_if_index, - INDEX_INVALID); - itpi = ipsec_protect_db.tunnels[sw_if_index]; + if (NULL == nh) + nh = &IP_ADDR_ALL_0; + itpi = ipsec_tun_protect_find (sw_if_index, nh); vec_foreach_index (ii, sas_in) { @@ -407,17 +631,18 @@ ipsec_tun_protect_update (u32 sw_if_index, u32 sa_out, u32 * sas_in) goto out; } - pool_get_zero (ipsec_protect_pool, itp); + pool_get_zero (ipsec_tun_protect_pool, itp); itp->itp_sw_if_index = sw_if_index; - ipsec_protect_db.tunnels[sw_if_index] = itp - ipsec_protect_pool; - ipsec_protect_db.count++; itp->itp_n_sa_in = vec_len (sas_in); for (ii = 0; ii < itp->itp_n_sa_in; ii++) itp->itp_in_sas[ii] = sas_in[ii]; itp->itp_out_sa = sa_out; + itp->itp_key = clib_mem_alloc (sizeof (*itp->itp_key)); + ip_address_copy (itp->itp_key, nh); + rv = dev_class->ip_tun_desc (sw_if_index, &itp->itp_tun.src, &itp->itp_tun.dst, &is_l2); @@ -425,6 +650,18 @@ ipsec_tun_protect_update (u32 sw_if_index, u32 sa_out, u32 * sas_in) if (rv) goto out; + if (ip46_address_is_zero (&itp->itp_tun.dst)) + { + /* tunnel has no destination address, presumably because it's p2mp + in which case we use the nh that this is protection for */ + ip46_address_t peer; + + ip_address_to_46 (nh, &peer); + + ipsec_tun_protect_update_from_teib + (itp, teib_entry_find (sw_if_index, &peer)); + } + if (is_l2) itp->itp_flags |= IPSEC_PROTECT_L2; @@ -451,18 +688,11 @@ ipsec_tun_protect_update (u32 sw_if_index, u32 sa_out, u32 * sas_in) * of the tunnel we are protecting, else it's dropped. */ ipsec_tun_protect_config (im, itp, sa_out, sas_in); - - if (1 == hash_elts (im->tun4_protect_by_key)) - ip4_register_protocol (IP_PROTOCOL_IPSEC_ESP, - ipsec4_tun_input_node.index); - if (1 == hash_elts (im->tun6_protect_by_key)) - ip6_register_protocol (IP_PROTOCOL_IPSEC_ESP, - ipsec6_tun_input_node.index); } else { /* updating SAs only */ - itp = pool_elt_at_index (ipsec_protect_pool, itpi); + itp = pool_elt_at_index (ipsec_tun_protect_pool, itpi); ipsec_tun_protect_unconfig (im, itp); ipsec_tun_protect_config (im, itp, sa_out, sas_in); @@ -477,17 +707,21 @@ out: } int -ipsec_tun_protect_del (u32 sw_if_index) +ipsec_tun_protect_del (u32 sw_if_index, const ip_address_t * nh) { ipsec_tun_protect_t *itp; ipsec_main_t *im; index_t itpi; + ITP_DBG2 ("delete: %U/%U", + format_vnet_sw_if_index_name, vnet_get_main (), sw_if_index, + format_ip_address, nh); + im = &ipsec_main; + if (NULL == nh) + nh = &IP_ADDR_ALL_0; - vec_validate_init_empty (ipsec_protect_db.tunnels, sw_if_index, - INDEX_INVALID); - itpi = ipsec_protect_db.tunnels[sw_if_index]; + itpi = ipsec_tun_protect_find (sw_if_index, nh); if (INDEX_INVALID == itpi) return (VNET_API_ERROR_NO_SUCH_ENTRY); @@ -495,9 +729,8 @@ ipsec_tun_protect_del (u32 sw_if_index) itp = ipsec_tun_protect_get (itpi); ipsec_tun_protect_unconfig (im, itp); - ipsec_protect_db.tunnels[itp->itp_sw_if_index] = INDEX_INVALID; - - pool_put (ipsec_protect_pool, itp); + clib_mem_free (itp->itp_key); + pool_put (ipsec_tun_protect_pool, itp); if (0 == hash_elts (im->tun4_protect_by_key)) ip4_unregister_protocol (IP_PROTOCOL_IPSEC_ESP); @@ -513,13 +746,150 @@ ipsec_tun_protect_walk (ipsec_tun_protect_walk_cb_t fn, void *ctx) index_t itpi; /* *INDENT-OFF* */ - pool_foreach_index(itpi, ipsec_protect_pool, + pool_foreach_index(itpi, ipsec_tun_protect_pool, + ({ + fn (itpi, ctx); + })); + /* *INDENT-ON* */ +} + +void +ipsec_tun_protect_walk_itf (u32 sw_if_index, + ipsec_tun_protect_walk_cb_t fn, void *ctx) +{ + ipsec_tun_protect_itf_db_t *idi; + ip_address_t *key; + index_t itpi; + + if (vec_len (itp_db.id_itf) <= sw_if_index) + return; + + idi = &itp_db.id_itf[sw_if_index]; + + /* *INDENT-OFF* */ + hash_foreach(key, itpi, idi->id_hash, ({ fn (itpi, ctx); })); /* *INDENT-ON* */ + if (INDEX_INVALID != idi->id_itp) + fn (idi->id_itp, ctx); } +static void +ipsec_tun_protect_adj_delegate_adj_deleted (adj_delegate_t * ad) +{ + /* remove our delegate */ + adj_delegate_remove (ad->ad_adj_index, ipsec_tun_adj_delegate_type); + ipsec_tun_protect_add_adj (ad->ad_adj_index, INDEX_INVALID); +} + +static void +ipsec_tun_protect_adj_delegate_adj_created (adj_index_t ai) +{ + /* add our delegate if there is protection for this neighbour */ + ip_address_t ip = IP_ADDRESS_V4_ALL_0S; + ip_adjacency_t *adj; + index_t itpi; + + adj = adj_get (ai); + + if (adj->lookup_next_index != IP_LOOKUP_NEXT_MIDCHAIN) + return; + + ip_address_from_46 (&adj->sub_type.midchain.next_hop, + adj->ia_nh_proto, &ip); + + itpi = ipsec_tun_protect_find (adj->rewrite_header.sw_if_index, &ip); + + if (INDEX_INVALID != itpi) + { + const ipsec_tun_protect_t *itp; + + itp = ipsec_tun_protect_get (itpi); + adj_delegate_add (adj_get (ai), ipsec_tun_adj_delegate_type, itpi); + ipsec_tun_protect_add_adj (ai, itp->itp_out_sa); + } +} + +static u8 * +ipsec_tun_protect_adj_delegate_format (const adj_delegate_t * aed, u8 * s) +{ + const ipsec_tun_protect_t *itp; + + itp = ipsec_tun_protect_from_const_base (aed); + s = format (s, "ipsec-tun-protect:\n%U", format_ipsec_tun_protect, itp); + + return (s); +} + +static void +ipsec_tun_teib_entry_added (const teib_entry_t * ne) +{ + const ip46_address_t *peer46; + ipsec_tun_protect_t *itp; + ip_address_t peer; + index_t itpi; + + peer46 = teib_entry_get_peer (ne); + ip_address_from_46 (peer46, + (ip46_address_is_ip4 (peer46) ? + FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6), &peer); + + itpi = ipsec_tun_protect_find (teib_entry_get_sw_if_index (ne), &peer); + + if (INDEX_INVALID == itpi) + return; + + itp = ipsec_tun_protect_get (itpi); + ipsec_tun_protect_rx_db_remove (&ipsec_main, itp); + ipsec_tun_protect_update_from_teib (itp, ne); + ipsec_tun_protect_set_crypto_addr (itp); + ipsec_tun_protect_rx_db_add (&ipsec_main, itp); + + ITP_DBG (itp, "teib-added"); +} + +static void +ipsec_tun_teib_entry_deleted (const teib_entry_t * ne) +{ + const ip46_address_t *peer46; + ipsec_tun_protect_t *itp; + ip_address_t peer; + index_t itpi; + + peer46 = teib_entry_get_peer (ne); + ip_address_from_46 (peer46, + (ip46_address_is_ip4 (peer46) ? + FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6), &peer); + + itpi = ipsec_tun_protect_find (teib_entry_get_sw_if_index (ne), &peer); + + if (INDEX_INVALID == itpi) + return; + + itp = ipsec_tun_protect_get (itpi); + ipsec_tun_protect_rx_db_remove (&ipsec_main, itp); + ipsec_tun_protect_update_from_teib (itp, NULL); + ipsec_tun_protect_set_crypto_addr (itp); + + ITP_DBG (itp, "teib-removed"); +} + +/** + * VFT registered with the adjacency delegate + */ +const static adj_delegate_vft_t ipsec_tun_adj_delegate_vft = { + .adv_adj_deleted = ipsec_tun_protect_adj_delegate_adj_deleted, + .adv_adj_created = ipsec_tun_protect_adj_delegate_adj_created, + .adv_format = ipsec_tun_protect_adj_delegate_format, +}; + +const static teib_vft_t ipsec_tun_teib_vft = { + .nv_added = ipsec_tun_teib_entry_added, + .nv_deleted = ipsec_tun_teib_entry_deleted, +}; + clib_error_t * ipsec_tunnel_protect_init (vlib_main_t * vm) { @@ -537,6 +907,13 @@ ipsec_tunnel_protect_init (vlib_main_t * vm) ipsec_add_feature ("ip6-output", "esp6-no-crypto", &im->esp6_no_crypto_tun_feature_index); + ipsec_tun_adj_delegate_type = + adj_delegate_register_new_type (&ipsec_tun_adj_delegate_vft); + + ipsec_tun_protect_logger = vlib_log_register_class ("ipsec", "tun"); + + teib_register (&ipsec_tun_teib_vft); + return 0; } |