tcp: handle cleanups without timers - vpp

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author	Florin Coras <fcoras@cisco.com>	2020-02-22 02:27:21 +0000
committer	Dave Barach <openvpp@barachs.net>	2020-02-25 14:48:46 +0000
commit	7a3a8664bbc9e295d6382949d2d0bcd1998a05f1 (patch)
tree	b16832f9db11bf71fcd64be628df689062f7431f /src/plugins/quic/certs.h
parent	47d8f5dcd655f0e01774822fca17dd38e7f557dd (diff)

tcp: handle cleanups without timers

Type: improvement Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: Ida896e9fbe83b4c76578b089bb3fd2bef5e07fd2

Diffstat (limited to 'src/plugins/quic/certs.h')

0 files changed, 0 insertions, 0 deletions

/* * Copyright (c) 2015 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include <vnet/ipsec/ipsec.h> #include <vnet/ipsec/esp.h> #include <vnet/udp/udp.h> #include <vnet/fib/fib_table.h> /** * @brief * SA packet & bytes counters */ vlib_combined_counter_main_t ipsec_sa_counters = { .name = "SA", .stat_segment_name = "/net/ipsec/sa", }; static clib_error_t * ipsec_call_add_del_callbacks (ipsec_main_t * im, ipsec_sa_t * sa, u32 sa_index, int is_add) { ipsec_ah_backend_t *ab; ipsec_esp_backend_t *eb; switch (sa->protocol) { case IPSEC_PROTOCOL_AH: ab = pool_elt_at_index (im->ah_backends, im->ah_current_backend); if (ab->add_del_sa_sess_cb) return ab->add_del_sa_sess_cb (sa_index, is_add); break; case IPSEC_PROTOCOL_ESP: eb = pool_elt_at_index (im->esp_backends, im->esp_current_backend); if (eb->add_del_sa_sess_cb) return eb->add_del_sa_sess_cb (sa_index, is_add); break; } return 0; } void ipsec_mk_key (ipsec_key_t * key, const u8 * data, u8 len) { memset (key, 0, sizeof (*key)); if (len > sizeof (key->data)) key->len = sizeof (key->data); else key->len = len; memcpy (key->data, data, key->len); } /** * 'stack' (resolve the recursion for) the SA tunnel destination */ static void ipsec_sa_stack (ipsec_sa_t * sa) { ipsec_main_t *im = &ipsec_main; fib_forward_chain_type_t fct; dpo_id_t tmp = DPO_INVALID; fct = fib_forw_chain_type_from_fib_proto ((ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ? FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4)); fib_entry_contribute_forwarding (sa->fib_entry_index, fct, &tmp); dpo_stack_from_node ((ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ? im->ah6_encrypt_node_index : im->ah4_encrypt_node_index), &sa->dpo[IPSEC_PROTOCOL_AH], &tmp); dpo_stack_from_node ((ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ? im->esp6_encrypt_node_index : im->esp4_encrypt_node_index), &sa->dpo[IPSEC_PROTOCOL_ESP], &tmp); dpo_reset (&tmp); } void ipsec_sa_set_crypto_alg (ipsec_sa_t * sa, ipsec_crypto_alg_t crypto_alg) { ipsec_main_t *im = &ipsec_main; sa->crypto_alg = crypto_alg; sa->crypto_iv_size = im->crypto_algs[crypto_alg].iv_size; sa->crypto_block_size = im->crypto_algs[crypto_alg].block_size; sa->crypto_enc_op_id = im->crypto_algs[crypto_alg].enc_op_id; sa->crypto_dec_op_id = im->crypto_algs[crypto_alg].dec_op_id; sa->crypto_calg = im->crypto_algs[crypto_alg].alg; ASSERT (sa->crypto_iv_size <= ESP_MAX_IV_SIZE); ASSERT (sa->crypto_block_size <= ESP_MAX_BLOCK_SIZE); if (IPSEC_CRYPTO_ALG_IS_GCM (crypto_alg)) { sa->integ_icv_size = im->crypto_algs[crypto_alg].icv_size; ipsec_sa_set_IS_AEAD (sa); } } void ipsec_sa_set_integ_alg (ipsec_sa_t * sa, ipsec_integ_alg_t integ_alg) { ipsec_main_t *im = &ipsec_main; sa->integ_alg = integ_alg; sa->integ_icv_size = im->integ_algs[integ_alg].icv_size; sa->integ_op_id = im->integ_algs[integ_alg].op_id; sa->integ_calg = im->integ_algs[integ_alg].alg; ASSERT (sa->integ_icv_size <= ESP_MAX_ICV_SIZE); } int ipsec_sa_add (u32 id, u32 spi, ipsec_protocol_t proto, ipsec_crypto_alg_t crypto_alg, const ipsec_key_t * ck, ipsec_integ_alg_t integ_alg, const ipsec_key_t * ik, ipsec_sa_flags_t flags, u32 tx_table_id, u32 salt, const ip46_address_t * tun_src, const ip46_address_t * tun_dst, u32 * sa_out_index) { vlib_main_t *vm = vlib_get_main (); ipsec_main_t *im = &ipsec_main; clib_error_t *err; ipsec_sa_t *sa; u32 sa_index; uword *p; p = hash_get (im->sa_index_by_sa_id, id); if (p) return VNET_API_ERROR_ENTRY_ALREADY_EXISTS; pool_get_aligned_zero (im->sad, sa, CLIB_CACHE_LINE_BYTES); fib_node_init (&sa->node, FIB_NODE_TYPE_IPSEC_SA); sa_index = sa - im->sad; vlib_validate_combined_counter (&ipsec_sa_counters, sa_index); vlib_zero_combined_counter (&ipsec_sa_counters, sa_index); sa->id = id; sa->spi = spi; sa->stat_index = sa_index; sa->protocol = proto; sa->flags = flags; sa->salt = salt; ipsec_sa_set_integ_alg (sa, integ_alg); clib_memcpy (&sa->integ_key, ik, sizeof (sa->integ_key)); ipsec_sa_set_crypto_alg (sa, crypto_alg); clib_memcpy (&sa->crypto_key, ck, sizeof (sa->crypto_key)); ip46_address_copy (&sa->tunnel_src_addr, tun_src); ip46_address_copy (&sa->tunnel_dst_addr, tun_dst); sa->crypto_key_index = vnet_crypto_key_add (vm, im->crypto_algs[crypto_alg].alg, (u8 *) ck->data, ck->len); sa->integ_key_index = vnet_crypto_key_add (vm, im->integ_algs[integ_alg].alg, (u8 *) ik->data, ik->len); err = ipsec_check_support_cb (im, sa); if (err) { clib_warning ("%s", err->what); pool_put (im->sad, sa); return VNET_API_ERROR_UNIMPLEMENTED; } err = ipsec_call_add_del_callbacks (im, sa, sa_index, 1); if (err) { pool_put (im->sad, sa); return VNET_API_ERROR_SYSCALL_ERROR_1; } if (ipsec_sa_is_set_IS_TUNNEL (sa) && !ipsec_sa_is_set_IS_INBOUND (sa)) { fib_protocol_t fproto = (ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ? FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4); fib_prefix_t pfx = { .fp_addr = sa->tunnel_dst_addr, .fp_len = (ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ? 128 : 32), .fp_proto = fproto, }; sa->tx_fib_index = fib_table_find (fproto, tx_table_id); if (sa->tx_fib_index == ~((u32) 0)) { pool_put (im->sad, sa); return VNET_API_ERROR_NO_SUCH_FIB; } sa->fib_entry_index = fib_table_entry_special_add (sa->tx_fib_index, &pfx, FIB_SOURCE_RR, FIB_ENTRY_FLAG_NONE); sa->sibling = fib_entry_child_add (sa->fib_entry_index, FIB_NODE_TYPE_IPSEC_SA, sa_index); ipsec_sa_stack (sa); /* generate header templates */ if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa)) { sa->ip6_hdr.ip_version_traffic_class_and_flow_label = 0x60; sa->ip6_hdr.hop_limit = 254; sa->ip6_hdr.src_address.as_u64[0] = sa->tunnel_src_addr.ip6.as_u64[0]; sa->ip6_hdr.src_address.as_u64[1] = sa->tunnel_src_addr.ip6.as_u64[1]; sa->ip6_hdr.dst_address.as_u64[0] = sa->tunnel_dst_addr.ip6.as_u64[0]; sa->ip6_hdr.dst_address.as_u64[1] = sa->tunnel_dst_addr.ip6.as_u64[1]; if (ipsec_sa_is_set_UDP_ENCAP (sa)) sa->ip6_hdr.protocol = IP_PROTOCOL_UDP; else sa->ip6_hdr.protocol = IP_PROTOCOL_IPSEC_ESP; } else { sa->ip4_hdr.ip_version_and_header_length = 0x45; sa->ip4_hdr.ttl = 254; sa->ip4_hdr.src_address.as_u32 = sa->tunnel_src_addr.ip4.as_u32; sa->ip4_hdr.dst_address.as_u32 = sa->tunnel_dst_addr.ip4.as_u32; if (ipsec_sa_is_set_UDP_ENCAP (sa)) sa->ip4_hdr.protocol = IP_PROTOCOL_UDP; else sa->ip4_hdr.protocol = IP_PROTOCOL_IPSEC_ESP; sa->ip4_hdr.checksum = ip4_header_checksum (&sa->ip4_hdr); } } if (ipsec_sa_is_set_UDP_ENCAP (sa)) { sa->udp_hdr.src_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec); sa->udp_hdr.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec); } hash_set (im->sa_index_by_sa_id, sa->id, sa_index); if (sa_out_index) *sa_out_index = sa_index; return (0); } u32 ipsec_sa_del (u32 id) { vlib_main_t *vm = vlib_get_main (); ipsec_main_t *im = &ipsec_main; ipsec_sa_t *sa = 0; uword *p; u32 sa_index; clib_error_t *err; p = hash_get (im->sa_index_by_sa_id, id); if (!p) return VNET_API_ERROR_NO_SUCH_ENTRY; sa_index = p[0]; sa = pool_elt_at_index (im->sad, sa_index); if (ipsec_is_sa_used (sa_index)) { clib_warning ("sa_id %u used in policy", sa->id); /* sa used in policy */ return VNET_API_ERROR_SYSCALL_ERROR_1; } hash_unset (im->sa_index_by_sa_id, sa->id); err = ipsec_call_add_del_callbacks (im, sa, sa_index, 0); if (err) return VNET_API_ERROR_SYSCALL_ERROR_2; if (ipsec_sa_is_set_IS_TUNNEL (sa) && !ipsec_sa_is_set_IS_INBOUND (sa)) { fib_entry_child_remove (sa->fib_entry_index, sa->sibling); fib_table_entry_special_remove (sa->tx_fib_index, fib_entry_get_prefix (sa->fib_entry_index), FIB_SOURCE_RR); dpo_reset (&sa->dpo[IPSEC_PROTOCOL_AH]); dpo_reset (&sa->dpo[IPSEC_PROTOCOL_ESP]); } vnet_crypto_key_del (vm, sa->crypto_key_index); vnet_crypto_key_del (vm, sa->integ_key_index); pool_put (im->sad, sa); return 0; } u8 ipsec_is_sa_used (u32 sa_index) { ipsec_main_t *im = &ipsec_main; ipsec_tunnel_if_t *t; ipsec_policy_t *p; /* *INDENT-OFF* */ pool_foreach(p, im->policies, ({ if (p->policy == IPSEC_POLICY_ACTION_PROTECT) { if (p->sa_index == sa_index) return 1; } })); pool_foreach(t, im->tunnel_interfaces, ({ if (t->input_sa_index == sa_index) return 1; if (t->output_sa_index == sa_index) return 1; })); /* *INDENT-ON* */ return 0; } int ipsec_set_sa_key (u32 id, const ipsec_key_t * ck, const ipsec_key_t * ik) { vlib_main_t *vm = vlib_get_main (); ipsec_main_t *im = &ipsec_main; uword *p; u32 sa_index; ipsec_sa_t *sa = 0; clib_error_t *err; p = hash_get (im->sa_index_by_sa_id, id); if (!p) return VNET_API_ERROR_SYSCALL_ERROR_1; /* no such sa-id */ sa_index = p[0]; sa = pool_elt_at_index (im->sad, sa_index); /* new crypto key */ if (ck) { clib_memcpy (&sa->crypto_key, ck, sizeof (sa->crypto_key)); vnet_crypto_key_modify (vm, sa->crypto_key_index, sa->crypto_calg, (u8 *) ck->data, ck->len); } /* new integ key */ if (ik) { clib_memcpy (&sa->integ_key, 0, sizeof (sa->integ_key)); vnet_crypto_key_modify (vm, sa->integ_key_index, sa->integ_calg, (u8 *) ik->data, ik->len); } if (ck || ik) { err = ipsec_call_add_del_callbacks (im, sa, sa_index, 0); if (err) { clib_error_free (err); return VNET_API_ERROR_SYSCALL_ERROR_1; } } return 0; } u32 ipsec_get_sa_index_by_sa_id (u32 sa_id) { ipsec_main_t *im = &ipsec_main; uword *p = hash_get (im->sa_index_by_sa_id, sa_id); if (!p) return ~0; return p[0]; } void ipsec_sa_walk (ipsec_sa_walk_cb_t cb, void *ctx) { ipsec_main_t *im = &ipsec_main; ipsec_sa_t *sa; /* *INDENT-OFF* */ pool_foreach (sa, im->sad, ({ if (WALK_CONTINUE != cb(sa, ctx)) break; })); /* *INDENT-ON* */ } /** * Function definition to get a FIB node from its index */ static fib_node_t * ipsec_sa_fib_node_get (fib_node_index_t index) { ipsec_main_t *im; ipsec_sa_t *sa; im = &ipsec_main; sa = pool_elt_at_index (im->sad, index); return (&sa->node); } /** * Function definition to inform the FIB node that its last lock has gone. */ static void ipsec_sa_last_lock_gone (fib_node_t * node) { /* * The ipsec SA is a root of the graph. As such * it never has children and thus is never locked. */ ASSERT (0); } static ipsec_sa_t * ipsec_sa_from_fib_node (fib_node_t * node) { ASSERT (FIB_NODE_TYPE_IPSEC_SA == node->fn_type); return ((ipsec_sa_t *) (((char *) node) - STRUCT_OFFSET_OF (ipsec_sa_t, node))); } /** * Function definition to backwalk a FIB node */ static fib_node_back_walk_rc_t ipsec_sa_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx) { ipsec_sa_stack (ipsec_sa_from_fib_node (node)); return (FIB_NODE_BACK_WALK_CONTINUE); } /* * Virtual function table registered by MPLS GRE tunnels * for participation in the FIB object graph. */ const static fib_node_vft_t ipsec_sa_vft = { .fnv_get = ipsec_sa_fib_node_get, .fnv_last_lock = ipsec_sa_last_lock_gone, .fnv_back_walk = ipsec_sa_back_walk, }; /* force inclusion from application's main.c */ clib_error_t * ipsec_sa_interface_init (vlib_main_t * vm) { fib_node_register_type (FIB_NODE_TYPE_IPSEC_SA, &ipsec_sa_vft); return 0; } VLIB_INIT_FUNCTION (ipsec_sa_interface_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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