ip: Protocol Independent IP Neighbors - vpp

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author	Neale Ranns <nranns@cisco.com>	2019-09-30 10:53:31 +0000
committer	Ole Trøan <otroan@employees.org>	2019-12-17 10:56:20 +0000
commit	cbe25aab3be72154f2c706c39eeba6a77f34450f (patch)
tree	131fb53b5ec973be045ffb9e2eb797af01d112a0 /test/test_l2tp.py
parent	96453fd2417ebd1d69354a7fb692976129cea80e (diff)

ip: Protocol Independent IP Neighbors

Type: feature - ip-neighbour: generic neighbour handling; APIs, DBs, event handling, aging - arp: ARP protocol implementation - ip6-nd; IPv6 neighbor discovery implementation; separate ND, MLD, RA - ip6-link; manage link-local addresses - l2-arp-term; events separated from IP neighbours, since they are not the same. vnet retains just enough education to perform ND/ARP packet construction. arp and ip6-nd to be moved to plugins soon. Change-Id: I88dedd0006b299344f4c7024a0aa5baa6b9a8bbe Signed-off-by: Neale Ranns <nranns@cisco.com>

Diffstat (limited to 'test/test_l2tp.py')

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. */ #ifndef __IPSEC_SPD_SA_H__ #define __IPSEC_SPD_SA_H__ #include <vlib/vlib.h> #include <vnet/ip/ip.h> #include <vnet/fib/fib_node.h> #define IPSEC_SA_ANTI_REPLAY_WINDOW_SIZE (64) #define foreach_ipsec_crypto_alg \ _ (0, NONE, "none") \ _ (1, AES_CBC_128, "aes-cbc-128") \ _ (2, AES_CBC_192, "aes-cbc-192") \ _ (3, AES_CBC_256, "aes-cbc-256") \ _ (4, AES_CTR_128, "aes-ctr-128") \ _ (5, AES_CTR_192, "aes-ctr-192") \ _ (6, AES_CTR_256, "aes-ctr-256") \ _ (7, AES_GCM_128, "aes-gcm-128") \ _ (8, AES_GCM_192, "aes-gcm-192") \ _ (9, AES_GCM_256, "aes-gcm-256") \ _ (10, DES_CBC, "des-cbc") \ _ (11, 3DES_CBC, "3des-cbc") typedef enum { #define _(v, f, s) IPSEC_CRYPTO_ALG_##f = v, foreach_ipsec_crypto_alg #undef _ IPSEC_CRYPTO_N_ALG, } ipsec_crypto_alg_t; #define foreach_ipsec_integ_alg \ _ (0, NONE, "none") \ _ (1, MD5_96, "md5-96") /* RFC2403 */ \ _ (2, SHA1_96, "sha1-96") /* RFC2404 */ \ _ (3, SHA_256_96, "sha-256-96") /* draft-ietf-ipsec-ciph-sha-256-00 */ \ _ (4, SHA_256_128, "sha-256-128") /* RFC4868 */ \ _ (5, SHA_384_192, "sha-384-192") /* RFC4868 */ \ _ (6, SHA_512_256, "sha-512-256") /* RFC4868 */ typedef enum { #define _(v, f, s) IPSEC_INTEG_ALG_##f = v, foreach_ipsec_integ_alg #undef _ IPSEC_INTEG_N_ALG, } ipsec_integ_alg_t; typedef enum { IPSEC_PROTOCOL_AH = 0, IPSEC_PROTOCOL_ESP = 1 } ipsec_protocol_t; #define IPSEC_N_PROTOCOLS (IPSEC_PROTOCOL_ESP+1) #define IPSEC_KEY_MAX_LEN 128 typedef struct ipsec_key_t_ { u8 len; u8 data[IPSEC_KEY_MAX_LEN]; } ipsec_key_t; /* * Enable extended sequence numbers * Enable Anti-replay * IPsec tunnel mode if non-zero, else transport mode * IPsec tunnel mode is IPv6 if non-zero, * else IPv4 tunnel only valid if is_tunnel is non-zero * enable UDP encapsulation for NAT traversal */ #define foreach_ipsec_sa_flags \ _ (0, NONE, "none") \ _ (1, USE_EXTENDED_SEQ_NUM, "esn") \ _ (2, USE_ANTI_REPLAY, "anti-replay") \ _ (4, IS_TUNNEL, "tunnel") \ _ (8, IS_TUNNEL_V6, "tunnel-v6") \ _ (16, UDP_ENCAP, "udp-encap") \ typedef enum ipsec_sad_flags_t_ { #define _(v, f, s) IPSEC_SA_FLAG_##f = v, foreach_ipsec_sa_flags #undef _ } __clib_packed ipsec_sa_flags_t; STATIC_ASSERT (sizeof (ipsec_sa_flags_t) == 1, "IPSEC SA flags > 1 byte"); typedef struct { CLIB_CACHE_LINE_ALIGN_MARK (cacheline0); /* flags */ ipsec_sa_flags_t flags; u8 crypto_iv_size; u8 crypto_block_size; u8 integ_trunc_size; u32 spi; u32 seq; u32 seq_hi; u32 last_seq; u32 last_seq_hi; u64 replay_window; vnet_crypto_op_type_t crypto_enc_op_type; vnet_crypto_op_type_t crypto_dec_op_type; vnet_crypto_op_type_t integ_op_type; dpo_id_t dpo[IPSEC_N_PROTOCOLS]; /* data accessed by dataplane code should be above this comment */ CLIB_CACHE_LINE_ALIGN_MARK (cacheline1); union { ip4_header_t ip4_hdr; ip6_header_t ip6_hdr; }; udp_header_t udp_hdr; fib_node_t node; u32 id; u32 stat_index; ipsec_protocol_t protocol; ipsec_crypto_alg_t crypto_alg; ipsec_key_t crypto_key; ipsec_integ_alg_t integ_alg; ipsec_key_t integ_key; ip46_address_t tunnel_src_addr; ip46_address_t tunnel_dst_addr; fib_node_index_t fib_entry_index; u32 sibling; u32 tx_fib_index; u32 salt; /* runtime */ } ipsec_sa_t; STATIC_ASSERT_OFFSET_OF (ipsec_sa_t, cacheline1, CLIB_CACHE_LINE_BYTES); #define _(a,v,s) \ always_inline int \ ipsec_sa_is_set_##v (const ipsec_sa_t *sa) { \ return (sa->flags & IPSEC_SA_FLAG_##v); \ } foreach_ipsec_sa_flags #undef _ #define _(a,v,s) \ always_inline int \ ipsec_sa_set_##v (ipsec_sa_t *sa) { \ return (sa->flags |= IPSEC_SA_FLAG_##v); \ } foreach_ipsec_sa_flags #undef _ /** * @brief * SA packet & bytes counters */ extern vlib_combined_counter_main_t ipsec_sa_counters; extern void ipsec_mk_key (ipsec_key_t * key, const u8 * data, u8 len); extern 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, const ip46_address_t * tunnel_src_addr, const ip46_address_t * tunnel_dst_addr, u32 * sa_index); extern u32 ipsec_sa_del (u32 id); extern void ipsec_sa_stack (ipsec_sa_t * sa); extern void ipsec_sa_set_crypto_alg (ipsec_sa_t * sa, ipsec_crypto_alg_t crypto_alg); extern void ipsec_sa_set_integ_alg (ipsec_sa_t * sa, ipsec_integ_alg_t integ_alg); extern u8 ipsec_is_sa_used (u32 sa_index); extern int ipsec_set_sa_key (u32 id, const ipsec_key_t * ck, const ipsec_key_t * ik); extern u32 ipsec_get_sa_index_by_sa_id (u32 sa_id); typedef walk_rc_t (*ipsec_sa_walk_cb_t) (ipsec_sa_t * sa, void *ctx); extern void ipsec_sa_walk (ipsec_sa_walk_cb_t cd, void *ctx); extern u8 *format_ipsec_crypto_alg (u8 * s, va_list * args); extern u8 *format_ipsec_integ_alg (u8 * s, va_list * args); extern u8 *format_ipsec_sa (u8 * s, va_list * args); extern u8 *format_ipsec_key (u8 * s, va_list * args); extern uword unformat_ipsec_crypto_alg (unformat_input_t * input, va_list * args); extern uword unformat_ipsec_integ_alg (unformat_input_t * input, va_list * args); extern uword unformat_ipsec_key (unformat_input_t * input, va_list * args); always_inline int ipsec_sa_anti_replay_check (ipsec_sa_t * sa, u32 * seqp) { u32 seq, diff, tl, th; if ((sa->flags & IPSEC_SA_FLAG_USE_ANTI_REPLAY) == 0) return 0; seq = clib_net_to_host_u32 (*seqp); if ((sa->flags & IPSEC_SA_FLAG_USE_EXTENDED_SEQ_NUM) == 0) { if (PREDICT_TRUE (seq > sa->last_seq)) return 0; diff = sa->last_seq - seq; if (IPSEC_SA_ANTI_REPLAY_WINDOW_SIZE > diff) return (sa->replay_window & (1ULL << diff)) ? 1 : 0; else return 1; return 0; } tl = sa->last_seq; th = sa->last_seq_hi; diff = tl - seq; if (PREDICT_TRUE (tl >= (IPSEC_SA_ANTI_REPLAY_WINDOW_SIZE - 1))) { if (seq >= (tl - IPSEC_SA_ANTI_REPLAY_WINDOW_SIZE + 1)) { sa->seq_hi = th; if (seq <= tl) return (sa->replay_window & (1ULL << diff)) ? 1 : 0; else return 0; } else { sa->seq_hi = th + 1; return 0; } } else { if (seq >= (tl - IPSEC_SA_ANTI_REPLAY_WINDOW_SIZE + 1)) { sa->seq_hi = th - 1; return (sa->replay_window & (1ULL << diff)) ? 1 : 0; } else { sa->seq_hi = th; if (seq <= tl) return (sa->replay_window & (1ULL << diff)) ? 1 : 0; else return 0; } } return 0; } always_inline void ipsec_sa_anti_replay_advance (ipsec_sa_t * sa, u32 * seqp) { u32 pos, seq; if (PREDICT_TRUE (sa->flags & IPSEC_SA_FLAG_USE_ANTI_REPLAY) == 0) return; seq = clib_host_to_net_u32 (*seqp); if (PREDICT_TRUE (sa->flags & IPSEC_SA_FLAG_USE_EXTENDED_SEQ_NUM)) { int wrap = sa->seq_hi - sa->last_seq_hi; if (wrap == 0 && seq > sa->last_seq) { pos = seq - sa->last_seq; if (pos < IPSEC_SA_ANTI_REPLAY_WINDOW_SIZE) sa->replay_window = ((sa->replay_window) << pos) | 1; else sa->replay_window = 1; sa->last_seq = seq; } else if (wrap > 0) { pos = ~seq + sa->last_seq + 1; if (pos < IPSEC_SA_ANTI_REPLAY_WINDOW_SIZE) sa->replay_window = ((sa->replay_window) << pos) | 1; else sa->replay_window = 1; sa->last_seq = seq; sa->last_seq_hi = sa->seq_hi; } else if (wrap < 0) { pos = ~seq + sa->last_seq + 1; sa->replay_window |= (1ULL << pos); } else { pos = sa->last_seq - seq; sa->replay_window |= (1ULL << pos); } } else { if (seq > sa->last_seq) { pos = seq - sa->last_seq; if (pos < IPSEC_SA_ANTI_REPLAY_WINDOW_SIZE) sa->replay_window = ((sa->replay_window) << pos) | 1; else sa->replay_window = 1; sa->last_seq = seq; } else { pos = sa->last_seq - seq; sa->replay_window |= (1ULL << pos); } } } #endif /* __IPSEC_SPD_SA_H__ */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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