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Diffstat (limited to 'src/vnet/map/map.h')
| -rw-r--r-- | src/vnet/map/map.h | 592 |
1 files changed, 0 insertions, 592 deletions
diff --git a/src/vnet/map/map.h b/src/vnet/map/map.h deleted file mode 100644 index c304a1ea38a..00000000000 --- a/src/vnet/map/map.h +++ /dev/null @@ -1,592 +0,0 @@ -/* - * 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 <stdbool.h> -#include <vppinfra/error.h> -#include <vnet/vnet.h> -#include <vnet/ip/ip.h> -#include <vlib/vlib.h> -#include <vnet/fib/fib_types.h> -#include <vnet/fib/ip4_fib.h> -#include <vnet/adj/adj.h> -#include <vnet/map/map_dpo.h> -#include <vnet/dpo/load_balance.h> - -#define MAP_SKIP_IP6_LOOKUP 1 - -int map_create_domain (ip4_address_t * ip4_prefix, u8 ip4_prefix_len, - ip6_address_t * ip6_prefix, u8 ip6_prefix_len, - ip6_address_t * ip6_src, u8 ip6_src_len, - u8 ea_bits_len, u8 psid_offset, u8 psid_length, - u32 * map_domain_index, u16 mtu, u8 flags); -int map_delete_domain (u32 map_domain_index); -int map_add_del_psid (u32 map_domain_index, u16 psid, ip6_address_t * tep, - u8 is_add); -u8 *format_map_trace (u8 * s, va_list * args); - -typedef enum -{ - MAP_DOMAIN_PREFIX = 1 << 0, - MAP_DOMAIN_TRANSLATION = 1 << 1, // The domain uses MAP-T - MAP_DOMAIN_RFC6052 = 1 << 2, -} __attribute__ ((__packed__)) map_domain_flags_e; - -/** - * IP4 reassembly logic: - * One virtually reassembled flow requires a map_ip4_reass_t structure in order - * to keep the first-fragment port number and, optionally, cache out of sequence - * packets. - * There are up to MAP_IP4_REASS_MAX_REASSEMBLY such structures. - * When in use, those structures are stored in a hash table of MAP_IP4_REASS_BUCKETS buckets. - * When a new structure needs to be used, it is allocated from available ones. - * If there is no structure available, the oldest in use is selected and used if and - * only if it was first allocated more than MAP_IP4_REASS_LIFETIME seconds ago. - * In case no structure can be allocated, the fragment is dropped. - */ - -#define MAP_IP4_REASS_LIFETIME_DEFAULT (100) /* ms */ -#define MAP_IP4_REASS_HT_RATIO_DEFAULT (1.0) -#define MAP_IP4_REASS_POOL_SIZE_DEFAULT 1024 // Number of reassembly structures -#define MAP_IP4_REASS_BUFFERS_DEFAULT 2048 - -#define MAP_IP4_REASS_MAX_FRAGMENTS_PER_REASSEMBLY 5 // Number of fragment per reassembly - -#define MAP_IP6_REASS_LIFETIME_DEFAULT (100) /* ms */ -#define MAP_IP6_REASS_HT_RATIO_DEFAULT (1.0) -#define MAP_IP6_REASS_POOL_SIZE_DEFAULT 1024 // Number of reassembly structures -#define MAP_IP6_REASS_BUFFERS_DEFAULT 2048 - -#define MAP_IP6_REASS_MAX_FRAGMENTS_PER_REASSEMBLY 5 - -#define MAP_IP6_REASS_COUNT_BYTES -#define MAP_IP4_REASS_COUNT_BYTES - -//#define IP6_MAP_T_OVERRIDE_TOS 0 - -/* - * This structure _MUST_ be no larger than a single cache line (64 bytes). - * If more space is needed make a union of ip6_prefix and *rules, those are mutually exclusive. - */ -typedef struct -{ - /* Required for pool_get_aligned */ - CLIB_CACHE_LINE_ALIGN_MARK (cacheline0); - ip6_address_t ip6_src; - ip6_address_t ip6_prefix; - ip6_address_t *rules; - u32 suffix_mask; - ip4_address_t ip4_prefix; - u16 psid_mask; - u16 mtu; - map_domain_flags_e flags; - u8 ip6_prefix_len; - u8 ip6_src_len; - u8 ea_bits_len; - u8 psid_offset; - u8 psid_length; - - /* helpers */ - u8 psid_shift; - u8 suffix_shift; - u8 ea_shift; - - /* not used by forwarding */ - u8 ip4_prefix_len; -} map_domain_t; - -STATIC_ASSERT ((sizeof (map_domain_t) <= CLIB_CACHE_LINE_BYTES), - "MAP domain fits in one cacheline"); - -#define MAP_REASS_INDEX_NONE ((u16)0xffff) - -/* - * Hash key, padded out to 16 bytes for fast compare - */ -/* *INDENT-OFF* */ -typedef union { - CLIB_PACKED (struct { - ip4_address_t src; - ip4_address_t dst; - u16 fragment_id; - u8 protocol; - }); - u64 as_u64[2]; - u32 as_u32[4]; -} map_ip4_reass_key_t; -/* *INDENT-ON* */ - -typedef struct -{ - map_ip4_reass_key_t key; - f64 ts; -#ifdef MAP_IP4_REASS_COUNT_BYTES - u16 expected_total; - u16 forwarded; -#endif - i32 port; - u16 bucket; - u16 bucket_next; - u16 fifo_prev; - u16 fifo_next; - u32 fragments[MAP_IP4_REASS_MAX_FRAGMENTS_PER_REASSEMBLY]; -} map_ip4_reass_t; - -/* - * MAP domain counters - */ -typedef enum -{ - /* Simple counters */ - MAP_DOMAIN_IPV4_FRAGMENT = 0, - /* Combined counters */ - MAP_DOMAIN_COUNTER_RX = 0, - MAP_DOMAIN_COUNTER_TX, - MAP_N_DOMAIN_COUNTER -} map_domain_counter_t; - -/* - * main_main_t - */ -/* *INDENT-OFF* */ -typedef union { - CLIB_PACKED (struct { - ip6_address_t src; - ip6_address_t dst; - u32 fragment_id; - u8 protocol; - }); - u64 as_u64[5]; - u32 as_u32[10]; -} map_ip6_reass_key_t; -/* *INDENT-OFF* */ - -typedef struct { - u32 pi; //Cached packet or ~0 - u16 next_data_offset; //The data offset of the additional 20 bytes or ~0 - u8 next_data_len; //Number of bytes ready to be copied (20 if not last fragment) - u8 next_data[20]; //The 20 additional bytes -} map_ip6_fragment_t; - -typedef struct { - map_ip6_reass_key_t key; - f64 ts; -#ifdef MAP_IP6_REASS_COUNT_BYTES - u16 expected_total; - u16 forwarded; -#endif - u16 bucket; //What hash bucket this element is linked in - u16 bucket_next; - u16 fifo_prev; - u16 fifo_next; - ip4_header_t ip4_header; - map_ip6_fragment_t fragments[MAP_IP6_REASS_MAX_FRAGMENTS_PER_REASSEMBLY]; -} map_ip6_reass_t; - -#ifdef MAP_SKIP_IP6_LOOKUP -/** - * A pre-resolved next-hop - */ -typedef struct map_main_pre_resolved_t_ -{ - /** - * Linkage into the FIB graph - */ - fib_node_t node; - - /** - * The FIB entry index of the next-hop - */ - fib_node_index_t fei; - - /** - * This object sibling index on the FIB entry's child dependency list - */ - u32 sibling; - - /** - * The Load-balance object index to use to forward - */ - dpo_id_t dpo; -} map_main_pre_resolved_t; - -/** - * Pre-resolved next hops for v4 and v6. Why these are global and not - * per-domain is beyond me. - */ -extern map_main_pre_resolved_t pre_resolved[FIB_PROTOCOL_MAX]; -#endif - -typedef struct { - /* pool of MAP domains */ - map_domain_t *domains; - - /* MAP Domain packet/byte counters indexed by map domain index */ - vlib_simple_counter_main_t *simple_domain_counters; - vlib_combined_counter_main_t *domain_counters; - volatile u32 *counter_lock; - - /* Traffic class: zero, copy (~0) or fixed value */ - u8 tc; - bool tc_copy; - - bool sec_check; /* Inbound security check */ - bool sec_check_frag; /* Inbound security check for (subsequent) fragments */ - bool icmp6_enabled; /* Send destination unreachable for security check failure */ - - bool is_ce; /* If this MAP node is a Customer Edge router*/ - - /* ICMPv6 -> ICMPv4 relay parameters */ - ip4_address_t icmp4_src_address; - vlib_simple_counter_main_t icmp_relayed; - - /* convenience */ - vlib_main_t *vlib_main; - vnet_main_t *vnet_main; - - /* - * IPv4 encap and decap reassembly - */ - /* Configuration */ - f32 ip4_reass_conf_ht_ratio; //Size of ht is 2^ceil(log2(ratio*pool_size)) - u16 ip4_reass_conf_pool_size; //Max number of allocated reass structures - u16 ip4_reass_conf_lifetime_ms; //Time a reassembly struct is considered valid in ms - u32 ip4_reass_conf_buffers; //Maximum number of buffers used by ip4 reassembly - - /* Runtime */ - map_ip4_reass_t *ip4_reass_pool; - u8 ip4_reass_ht_log2len; //Hash table size is 2^log2len - u16 ip4_reass_allocated; - u16 *ip4_reass_hash_table; - u16 ip4_reass_fifo_last; - volatile u32 *ip4_reass_lock; - - /* Counters */ - u32 ip4_reass_buffered_counter; - - bool frag_inner; /* Inner or outer fragmentation */ - bool frag_ignore_df; /* Fragment (outer) packet even if DF is set */ - - /* - * IPv6 decap reassembly - */ - /* Configuration */ - f32 ip6_reass_conf_ht_ratio; //Size of ht is 2^ceil(log2(ratio*pool_size)) - u16 ip6_reass_conf_pool_size; //Max number of allocated reass structures - u16 ip6_reass_conf_lifetime_ms; //Time a reassembly struct is considered valid in ms - u32 ip6_reass_conf_buffers; //Maximum number of buffers used by ip6 reassembly - - /* Runtime */ - map_ip6_reass_t *ip6_reass_pool; - u8 ip6_reass_ht_log2len; //Hash table size is 2^log2len - u16 ip6_reass_allocated; - u16 *ip6_reass_hash_table; - u16 ip6_reass_fifo_last; - volatile u32 *ip6_reass_lock; - - /* Counters */ - u32 ip6_reass_buffered_counter; - -} map_main_t; - -/* - * MAP Error counters/messages - */ -#define foreach_map_error \ - /* Must be first. */ \ - _(NONE, "valid MAP packets") \ - _(BAD_PROTOCOL, "bad protocol") \ - _(SEC_CHECK, "security check failed") \ - _(ENCAP_SEC_CHECK, "encap security check failed") \ - _(DECAP_SEC_CHECK, "decap security check failed") \ - _(ICMP, "unable to translate ICMP") \ - _(ICMP_RELAY, "unable to relay ICMP") \ - _(UNKNOWN, "unknown") \ - _(NO_BINDING, "no binding") \ - _(NO_DOMAIN, "no domain") \ - _(FRAGMENTED, "packet is a fragment") \ - _(FRAGMENT_MEMORY, "could not cache fragment") \ - _(FRAGMENT_MALFORMED, "fragment has unexpected format")\ - _(FRAGMENT_DROPPED, "dropped cached fragment") \ - _(MALFORMED, "malformed packet") \ - _(DF_SET, "can't fragment, DF set") - -typedef enum { -#define _(sym,str) MAP_ERROR_##sym, - foreach_map_error -#undef _ - MAP_N_ERROR, - } map_error_t; - -u64 map_error_counter_get(u32 node_index, map_error_t map_error); - -typedef struct { - u32 map_domain_index; - u16 port; -} map_trace_t; - -extern map_main_t map_main; - -extern vlib_node_registration_t ip4_map_node; -extern vlib_node_registration_t ip6_map_node; - -extern vlib_node_registration_t ip4_map_t_node; -extern vlib_node_registration_t ip4_map_t_fragmented_node; -extern vlib_node_registration_t ip4_map_t_tcp_udp_node; -extern vlib_node_registration_t ip4_map_t_icmp_node; - -extern vlib_node_registration_t ip6_map_t_node; -extern vlib_node_registration_t ip6_map_t_fragmented_node; -extern vlib_node_registration_t ip6_map_t_tcp_udp_node; -extern vlib_node_registration_t ip6_map_t_icmp_node; - -/* - * map_get_pfx - */ -static_always_inline u64 -map_get_pfx (map_domain_t *d, u32 addr, u16 port) -{ - u16 psid = (port >> d->psid_shift) & d->psid_mask; - - if (d->ea_bits_len == 0 && d->rules) - return clib_net_to_host_u64(d->rules[psid].as_u64[0]); - - u32 suffix = (addr >> d->suffix_shift) & d->suffix_mask; - u64 ea = d->ea_bits_len == 0 ? 0 : (((u64) suffix << d->psid_length)) | psid; - - return clib_net_to_host_u64(d->ip6_prefix.as_u64[0]) | ea << d->ea_shift; -} - -static_always_inline u64 -map_get_pfx_net (map_domain_t *d, u32 addr, u16 port) -{ - return clib_host_to_net_u64(map_get_pfx(d, clib_net_to_host_u32(addr), - clib_net_to_host_u16(port))); -} - -/* - * map_get_sfx - */ -static_always_inline u64 -map_get_sfx (map_domain_t *d, u32 addr, u16 port) -{ - u16 psid = (port >> d->psid_shift) & d->psid_mask; - - /* Shared 1:1 mode. */ - if (d->ea_bits_len == 0 && d->rules) - return clib_net_to_host_u64(d->rules[psid].as_u64[1]); - if (d->ip6_prefix_len == 128) - return clib_net_to_host_u64(d->ip6_prefix.as_u64[1]); - - if (d->flags & MAP_DOMAIN_RFC6052) - return (clib_net_to_host_u64(d->ip6_prefix.as_u64[1]) | addr); - - /* IPv4 prefix */ - if (d->flags & MAP_DOMAIN_PREFIX) - return (u64) (addr & (0xFFFFFFFF << d->suffix_shift)) << 16; - - /* Shared or full IPv4 address */ - return ((u64) addr << 16) | psid; -} - -static_always_inline u64 -map_get_sfx_net (map_domain_t *d, u32 addr, u16 port) -{ - return clib_host_to_net_u64(map_get_sfx(d, clib_net_to_host_u32(addr), - clib_net_to_host_u16(port))); -} - -static_always_inline u32 -map_get_ip4 (ip6_address_t *addr, map_domain_flags_e flags) -{ - if (flags & MAP_DOMAIN_RFC6052) - return clib_host_to_net_u32(clib_net_to_host_u64(addr->as_u64[1])); - else - return clib_host_to_net_u32(clib_net_to_host_u64(addr->as_u64[1]) >> 16); -} - -/* - * Get the MAP domain from an IPv4 lookup adjacency. - */ -static_always_inline map_domain_t * -ip4_map_get_domain (u32 mdi) -{ - map_main_t *mm = &map_main; - - return pool_elt_at_index(mm->domains, mdi); -} - -/* - * Get the MAP domain from an IPv6 lookup adjacency. - * If the IPv6 address or prefix is not shared, no lookup is required. - * The IPv4 address is used otherwise. - */ -static_always_inline map_domain_t * -ip6_map_get_domain (u32 mdi, - ip4_address_t *addr, - u32 *map_domain_index, - u8 *error) -{ - map_main_t *mm = &map_main; - -#ifdef TODO - /* - * Disable direct MAP domain lookup on decap, until the security check is updated to verify IPv4 SA. - * (That's done implicitly when MAP domain is looked up in the IPv4 FIB) - */ - //#ifdef MAP_NONSHARED_DOMAIN_ENABLED - //#error "How can you be sure this domain is not shared?" -#endif - - *map_domain_index = mdi; - return pool_elt_at_index(mm->domains, mdi); - -#ifdef TODO - u32 lbi = ip4_fib_forwarding_lookup(0, addr); - const dpo_id_t *dpo = load_balance_get_bucket(lbi, 0); - if (PREDICT_TRUE(dpo->dpoi_type == map_dpo_type || - dpo->dpoi_type == map_t_dpo_type)) - { - *map_domain_index = dpo->dpoi_index; - return pool_elt_at_index(mm->domains, *map_domain_index); - } - *error = MAP_ERROR_NO_DOMAIN; - return NULL; -#endif -} - -map_ip4_reass_t * -map_ip4_reass_get(u32 src, u32 dst, u16 fragment_id, - u8 protocol, u32 **pi_to_drop); -void -map_ip4_reass_free(map_ip4_reass_t *r, u32 **pi_to_drop); - -#define map_ip4_reass_lock() while (__sync_lock_test_and_set(map_main.ip4_reass_lock, 1)) {} -#define map_ip4_reass_unlock() do {CLIB_MEMORY_BARRIER(); *map_main.ip4_reass_lock = 0;} while(0) - -static_always_inline void -map_ip4_reass_get_fragments(map_ip4_reass_t *r, u32 **pi) -{ - int i; - for (i=0; i<MAP_IP4_REASS_MAX_FRAGMENTS_PER_REASSEMBLY; i++) - if(r->fragments[i] != ~0) { - vec_add1(*pi, r->fragments[i]); - r->fragments[i] = ~0; - map_main.ip4_reass_buffered_counter--; - } -} - -int map_ip4_reass_add_fragment(map_ip4_reass_t *r, u32 pi); - -map_ip6_reass_t * -map_ip6_reass_get(ip6_address_t *src, ip6_address_t *dst, u32 fragment_id, - u8 protocol, u32 **pi_to_drop); -void -map_ip6_reass_free(map_ip6_reass_t *r, u32 **pi_to_drop); - -#define map_ip6_reass_lock() while (__sync_lock_test_and_set(map_main.ip6_reass_lock, 1)) {} -#define map_ip6_reass_unlock() do {CLIB_MEMORY_BARRIER(); *map_main.ip6_reass_lock = 0;} while(0) - -int -map_ip6_reass_add_fragment(map_ip6_reass_t *r, u32 pi, - u16 data_offset, u16 next_data_offset, - u8 *data_start, u16 data_len); - -void map_ip4_drop_pi(u32 pi); - -int map_ip4_reass_conf_ht_ratio(f32 ht_ratio, u32 *trashed_reass, u32 *dropped_packets); -#define MAP_IP4_REASS_CONF_HT_RATIO_MAX 100 -int map_ip4_reass_conf_pool_size(u16 pool_size, u32 *trashed_reass, u32 *dropped_packets); -#define MAP_IP4_REASS_CONF_POOL_SIZE_MAX (0xfeff) -int map_ip4_reass_conf_lifetime(u16 lifetime_ms); -#define MAP_IP4_REASS_CONF_LIFETIME_MAX 0xffff -int map_ip4_reass_conf_buffers(u32 buffers); -#define MAP_IP4_REASS_CONF_BUFFERS_MAX (0xffffffff) - -void map_ip6_drop_pi(u32 pi); - - -int map_ip6_reass_conf_ht_ratio(f32 ht_ratio, u32 *trashed_reass, u32 *dropped_packets); -#define MAP_IP6_REASS_CONF_HT_RATIO_MAX 100 -int map_ip6_reass_conf_pool_size(u16 pool_size, u32 *trashed_reass, u32 *dropped_packets); -#define MAP_IP6_REASS_CONF_POOL_SIZE_MAX (0xfeff) -int map_ip6_reass_conf_lifetime(u16 lifetime_ms); -#define MAP_IP6_REASS_CONF_LIFETIME_MAX 0xffff -int map_ip6_reass_conf_buffers(u32 buffers); -#define MAP_IP6_REASS_CONF_BUFFERS_MAX (0xffffffff) - -static_always_inline void -ip4_map_t_embedded_address (map_domain_t *d, - ip6_address_t *ip6, const ip4_address_t *ip4) -{ - ASSERT(d->ip6_src_len == 96); //No support for other lengths for now - ip6->as_u64[0] = d->ip6_src.as_u64[0]; - ip6->as_u32[2] = d->ip6_src.as_u32[2]; - ip6->as_u32[3] = ip4->as_u32; -} - -static_always_inline u32 -ip6_map_t_embedded_address (map_domain_t *d, ip6_address_t *addr) -{ - ASSERT(d->ip6_src_len == 96); //No support for other lengths for now - return addr->as_u32[3]; -} - -static inline void -map_domain_counter_lock (map_main_t *mm) -{ - if (mm->counter_lock) - while (__sync_lock_test_and_set(mm->counter_lock, 1)) - /* zzzz */ ; -} -static inline void -map_domain_counter_unlock (map_main_t *mm) -{ - if (mm->counter_lock) - *mm->counter_lock = 0; -} - - -static_always_inline void -map_send_all_to_node(vlib_main_t *vm, u32 *pi_vector, - vlib_node_runtime_t *node, vlib_error_t *error, - u32 next) -{ - u32 n_left_from, *from, next_index, *to_next, n_left_to_next; - //Deal with fragments that are ready - from = pi_vector; - n_left_from = vec_len(pi_vector); - next_index = node->cached_next_index; - while (n_left_from > 0) { - vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next); - while (n_left_from > 0 && n_left_to_next > 0) { - u32 pi0 = to_next[0] = from[0]; - from += 1; - n_left_from -= 1; - to_next += 1; - n_left_to_next -= 1; - vlib_buffer_t *p0 = vlib_get_buffer(vm, pi0); - p0->error = *error; - vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, n_left_to_next, pi0, next); - } - vlib_put_next_frame(vm, node, next_index, n_left_to_next); - } -} - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |