/* * map.c : MAP support * * 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 #include #include #include #include #include #include #include "map.h" map_main_t map_main; /* * This code supports the following MAP modes: * * Algorithmic Shared IPv4 address (ea_bits_len > 0): * ea_bits_len + ip4_prefix > 32 * psid_length > 0, ip6_prefix < 64, ip4_prefix <= 32 * Algorithmic Full IPv4 address (ea_bits_len > 0): * ea_bits_len + ip4_prefix = 32 * psid_length = 0, ip6_prefix < 64, ip4_prefix <= 32 * Algorithmic IPv4 prefix (ea_bits_len > 0): * ea_bits_len + ip4_prefix < 32 * psid_length = 0, ip6_prefix < 64, ip4_prefix <= 32 * * Independent Shared IPv4 address (ea_bits_len = 0): * ip4_prefix = 32 * psid_length > 0 * Rule IPv6 address = 128, Rule PSID Set * Independent Full IPv4 address (ea_bits_len = 0): * ip4_prefix = 32 * psid_length = 0, ip6_prefix = 128 * Independent IPv4 prefix (ea_bits_len = 0): * ip4_prefix < 32 * psid_length = 0, ip6_prefix = 128 * */ /* * This code supports MAP-T: * * With a DMR prefix length of 64 or 96 (RFC6052). * */ /* * Save user-assigned MAP domain names ("tags") in a vector of * extra domain information. */ static void map_save_extras (u32 map_domain_index, u8 * tag) { map_main_t *mm = &map_main; map_domain_extra_t *de; if (map_domain_index == ~0) return; vec_validate (mm->domain_extras, map_domain_index); de = vec_elt_at_index (mm->domain_extras, map_domain_index); clib_memset (de, 0, sizeof (*de)); if (!tag) return; vec_validate_init_c_string (de->tag, tag, strlen ((char *) tag)); } static void map_free_extras (u32 map_domain_index) { map_main_t *mm = &map_main; map_domain_extra_t *de; if (map_domain_index == ~0) return; if (map_domain_index >= vec_len (mm->domain_extras)) return; de = vec_elt_at_index (mm->domain_extras, map_domain_index); vec_free (de->tag); } 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, u8 * tag) { u8 suffix_len, suffix_shift; map_main_t *mm = &map_main; map_domain_t *d; /* How many, and which bits to grab from the IPv4 DA */ if (ip4_prefix_len + ea_bits_len < 32) { flags |= MAP_DOMAIN_PREFIX; suffix_shift = 32 - ip4_prefix_len - ea_bits_len; suffix_len = ea_bits_len; } else { suffix_shift = 0; suffix_len = 32 - ip4_prefix_len; } /* EA bits must be within the first 64 bits */ if (ea_bits_len > 0 && ((ip6_prefix_len + ea_bits_len) > 64 || ip6_prefix_len + suffix_len + psid_length > 64)) { clib_warning ("Embedded Address bits must be within the first 64 bits of " "the IPv6 prefix"); return -1; } /* Get domain index */ pool_get_aligned (mm->domains, d, CLIB_CACHE_LINE_BYTES); clib_memset (d, 0, sizeof (*d)); *map_domain_index = d - mm->domains; /* Init domain struct */ d->ip4_prefix.as_u32 = ip4_prefix->as_u32; d->ip4_prefix_len = ip4_prefix_len; d->ip6_prefix = *ip6_prefix; d->ip6_prefix_len = ip6_prefix_len; d->ip6_src = *ip6_src; d->ip6_src_len = ip6_src_len; d->ea_bits_len = ea_bits_len; d->psid_offset = psid_offset; d->psid_length = psid_length; d->mtu = mtu; d->flags = flags; d->suffix_shift = suffix_shift; d->suffix_mask = (1 << suffix_len) - 1; d->psid_shift = 16 - psid_length - psid_offset; d->psid_mask = (1 << d->psid_length) - 1; d->ea_shift = 64 - ip6_prefix_len - suffix_len - d->psid_length; /* Save a user-assigned MAP domain name if provided. */ if (tag) map_save_extras (*map_domain_index, tag); /* MAP longest match lookup table (input feature / FIB) */ mm->ip4_prefix_tbl->add (mm->ip4_prefix_tbl, &d->ip4_prefix, d->ip4_prefix_len, *map_domain_index); /* Really needed? Or always use FIB? */ mm->ip6_src_prefix_tbl->add (mm->ip6_src_prefix_tbl, &d->ip6_src, d->ip6_src_len, *map_domain_index); /* Let's build a table with the MAP rule ip6 prefixes as well [dgeist] */ mm->ip6_prefix_tbl->add (mm->ip6_prefix_tbl, &d->ip6_prefix, d->ip6_prefix_len, *map_domain_index); /* Validate packet/byte counters */ map_domain_counter_lock (mm); int i; for (i = 0; i < vec_len (mm->simple_domain_counters); i++) { vlib_validate_simple_counter (&mm->simple_domain_counters[i], *map_domain_index); vlib_zero_simple_counter (&mm->simple_domain_counters[i], *map_domain_index); } for (i = 0; i < vec_len (mm->domain_counters); i++) { vlib_validate_combined_counter (&mm->domain_counters[i], *map_domain_index); vlib_zero_combined_counter (&mm->domain_counters[i], *map_domain_index); } map_domain_counter_unlock (mm); return 0; } /* * map_delete_domain */ int map_delete_domain (u32 map_domain_index) { map_main_t *mm = &map_main; map_domain_t *d; if (pool_is_free_index (mm->domains, map_domain_index)) { clib_warning ("MAP domain delete: domain does not exist: %d", map_domain_index); return -1; } d = pool_elt_at_index (mm->domains, map_domain_index); mm->ip4_prefix_tbl->delete (mm->ip4_prefix_tbl, &d->ip4_prefix, d->ip4_prefix_len); mm->ip6_src_prefix_tbl->delete (mm->ip6_src_prefix_tbl, &d->ip6_src, d->ip6_src_len); /* Addition to remove the new table [dgeist] */ mm->ip6_prefix_tbl->delete (mm->ip6_prefix_tbl, &d->ip6_prefix, d->ip6_prefix_len); /* Release user-assigned MAP domain name. */ map_free_extras (map_domain_index); /* Deleting rules */ if (d->rules) clib_mem_free (d->rules); pool_put (mm->domains, d); return 0; } int map_add_del_psid (u32 map_domain_index, u16 psid, ip6_address_t * tep, bool is_add) { map_domain_t *d; map_main_t *mm = &map_main; if (pool_is_free_index (mm->domains, map_domain_index)) { clib_warning ("MAP rule: domain does not exist: %d", map_domain_index); return -1; } d = pool_elt_at_index (mm->domains, map_domain_index); /* Rules are only used in 1:1 independent case */ if (d->ea_bits_len > 0) return (-1); if (!d->rules) { u32 l = (0x1 << d->psid_length) * sizeof (ip6_address_t); d->rules = clib_mem_alloc_aligned (l, CLIB_CACHE_LINE_BYTES); if (!d->rules) return -1; clib_memset (d->rules, 0, l); } if (psid >= (0x1 << d->psid_length)) { clib_warning ("MAP rule: PSID outside bounds: %d [%d]", psid, 0x1 << d->psid_length); return -1; } if (is_add) { d->rules[psid] = *tep; } else { clib_memset (&d->rules[psid], 0, sizeof (ip6_address_t)); } return 0; } #ifdef MAP_SKIP_IP6_LOOKUP /** * Pre-resolved per-protocol global next-hops */ map_main_pre_resolved_t pre_resolved[FIB_PROTOCOL_MAX]; static void map_pre_resolve_init (map_main_pre_resolved_t * pr) { pr->fei = FIB_NODE_INDEX_INVALID; fib_node_init (&pr->node, FIB_NODE_TYPE_MAP_E); } static u8 * format_map_pre_resolve (u8 * s, va_list * ap) { map_main_pre_resolved_t *pr = va_arg (*ap, map_main_pre_resolved_t *); if (FIB_NODE_INDEX_INVALID != pr->fei) { const fib_prefix_t *pfx; pfx = fib_entry_get_prefix (pr->fei); return (format (s, "%U (%u)", format_ip46_address, &pfx->fp_addr, IP46_TYPE_ANY, pr->dpo.dpoi_index)); } else { return (format (s, "un-set")); } } /** * Function definition to inform the FIB node that its last lock has gone. */ static void map_last_lock_gone (fib_node_t * node) { /* * The MAP is a root of the graph. As such * it never has children and thus is never locked. */ ASSERT (0); } static map_main_pre_resolved_t * map_from_fib_node (fib_node_t * node) { ASSERT (FIB_NODE_TYPE_MAP_E == node->fn_type); return ((map_main_pre_resolved_t *) (((char *) node) - STRUCT_OFFSET_OF (map_main_pre_resolved_t, node))); } static void map_stack (map_main_pre_resolved_t * pr) { const dpo_id_t *dpo; dpo = fib_entry_contribute_ip_forwarding (pr->fei); dpo_copy (&pr->dpo, dpo); } /** * Function definition to backwalk a FIB node */ static fib_node_back_walk_rc_t map_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx) { map_stack (map_from_fib_node (node)); return (FIB_NODE_BACK_WALK_CONTINUE); } /** * Function definition to get a FIB node from its index */ static fib_node_t * map_fib_node_get (fib_node_index_t index) { return (&pre_resolved[index].node); } /* * Virtual function table registered by MPLS GRE tunnels * for participation in the FIB object graph. */ const static fib_node_vft_t map_vft = { .fnv_get = map_fib_node_get, .fnv_last_lock = map_last_lock_gone, .fnv_back_walk = map_back_walk, }; static void map_fib_resolve (map_main_pre_resolved_t * pr, fib_protocol_t proto, u8 len, const ip46_address_t * addr) { fib_prefix_t pfx = { .fp_proto = proto, .fp_len = len, .fp_addr = *addr, }; pr->fei = fib_entry_track (0, // default fib &pfx, FIB_NODE_TYPE_MAP_E, proto, &pr->sibling); map_stack (pr); } static void map_fib_unresolve (map_main_pre_resolved_t * pr, fib_protocol_t proto, u8 len, const ip46_address_t * addr) { if (pr->fei != FIB_NODE_INDEX_INVALID) { fib_entry_untrack (pr->fei, pr->sibling); dpo_reset (&pr->dpo); pr->fei = FIB_NODE_INDEX_INVALID; pr->sibling = FIB_NODE_INDEX_INVALID; } } void map_pre_resolve (ip4_address_t * ip4, ip6_address_t * ip6, bool is_del) { if (ip6 && (ip6->as_u64[0] != 0 || ip6->as_u64[1] != 0)) { ip46_address_t addr = { .ip6 = *ip6, }; if (is_del) map_fib_unresolve (&pre_resolved[FIB_PROTOCOL_IP6], FIB_PROTOCOL_IP6, 128, &addr); else map_fib_resolve (&pre_resolved[FIB_PROTOCOL_IP6], FIB_PROTOCOL_IP6, 128, &addr); } if (ip4 && (ip4->as_u32 != 0)) { ip46_address_t addr = { .ip4 = *ip4, }; if (is_del) map_fib_unresolve (&pre_resolved[FIB_PROTOCOL_IP4], FIB_PROTOCOL_IP4, 32, &addr); else map_fib_resolve (&pre_resolved[FIB_PROTOCOL_IP4], FIB_PROTOCOL_IP4, 32, &addr); } } #endif static clib_error_t * map_security_check_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; clib_error_t *error = NULL; bool enable = false; bool check_frag = false; bool saw_enable = false; bool saw_frag = false; /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) return 0; while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "enable")) { enable = true; saw_enable = true; } else if (unformat (line_input, "disable")) { enable = false; saw_enable = true; } else if (unformat (line_input, "fragments on")) { check_frag = true; saw_frag = true; } else if (unformat (line_input, "fragments off")) { check_frag = false; saw_frag = true; } else { error = clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); goto done; } } if (!saw_enable) { error = clib_error_return (0, "Must specify enable 'enable' or 'disable'"); goto done; } if (!saw_frag) { error = clib_error_return (0, "Must specify fragments 'on' or 'off'"); goto done; } map_param_set_security_check (enable, check_frag); done: unformat_free (line_input); return error; } static clib_error_t * map_add_domain_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; ip4_address_t ip4_prefix; ip6_address_t ip6_prefix; ip6_address_t ip6_src; u32 ip6_prefix_len = 0, ip4_prefix_len = 0, map_domain_index, ip6_src_len; u32 num_m_args = 0; /* Optional arguments */ u32 ea_bits_len = 0, psid_offset = 0, psid_length = 0; u32 mtu = 0; u8 flags = 0; u8 *tag = 0; ip6_src_len = 128; clib_error_t *error = NULL; /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) return 0; while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "ip4-pfx %U/%d", unformat_ip4_address, &ip4_prefix, &ip4_prefix_len)) num_m_args++; else if (unformat (line_input, "ip6-pfx %U/%d", unformat_ip6_address, &ip6_prefix, &ip6_prefix_len)) num_m_args++; else if (unformat (line_input, "ip6-src %U/%d", unformat_ip6_address, &ip6_src, &ip6_src_len)) num_m_args++; else if (unformat (line_input, "ip6-src %U", unformat_ip6_address, &ip6_src)) num_m_args++; else if (unformat (line_input, "ea-bits-len %d", &ea_bits_len)) num_m_args++; else if (unformat (line_input, "psid-offset %d", &psid_offset)) num_m_args++; else if (unformat (line_input, "psid-len %d", &psid_length)) num_m_args++; else if (unformat (line_input, "mtu %d", &mtu)) num_m_args++; else if (unformat (line_input, "tag %s", &tag)) ; else { error = clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); goto done; } } if (num_m_args < 3) { error = clib_error_return (0, "mandatory argument(s) missing"); goto done; } map_create_domain (&ip4_prefix, ip4_prefix_len, &ip6_prefix, ip6_prefix_len, &ip6_src, ip6_src_len, ea_bits_len, psid_offset, psid_length, &map_domain_index, mtu, flags, tag); done: vec_free (tag); unformat_free (line_input); return error; } static clib_error_t * map_del_domain_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; u32 num_m_args = 0; u32 map_domain_index; clib_error_t *error = NULL; /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) return 0; while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "index %d", &map_domain_index)) num_m_args++; else { error = clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); goto done; } } if (num_m_args != 1) { error = clib_error_return (0, "mandatory argument(s) missing"); goto done; } map_delete_domain (map_domain_index); done: unformat_free (line_input); return error; } static clib_error_t * map_add_rule_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; ip6_address_t tep; u32 num_m_args = 0; u32 psid = 0, map_domain_index; clib_error_t *error = NULL; /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) return 0; while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "index %d", &map_domain_index)) num_m_args++; else if (unformat (line_input, "psid %d", &psid)) num_m_args++; else if (unformat (line_input, "ip6-dst %U", unformat_ip6_address, &tep)) num_m_args++; else { error = clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); goto done; } } if (num_m_args != 3) { error = clib_error_return (0, "mandatory argument(s) missing"); goto done; } if (map_add_del_psid (map_domain_index, psid, &tep, 1) != 0) { error = clib_error_return (0, "Failing to add Mapping Rule"); goto done; } done: unformat_free (line_input); return error; } #if MAP_SKIP_IP6_LOOKUP static clib_error_t * map_pre_resolve_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; ip4_address_t ip4nh, *p_v4 = NULL; ip6_address_t ip6nh, *p_v6 = NULL; clib_error_t *error = NULL; bool is_del = false; clib_memset (&ip4nh, 0, sizeof (ip4nh)); clib_memset (&ip6nh, 0, sizeof (ip6nh)); /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) return 0; while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "ip4-nh %U", unformat_ip4_address, &ip4nh)) p_v4 = &ip4nh; else if (unformat (line_input, "ip6-nh %U", unformat_ip6_address, &ip6nh)) p_v6 = &ip6nh; else if (unformat (line_input, "del")) is_del = true; else { error = clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); goto done; } } map_pre_resolve (p_v4, p_v6, is_del); done: unformat_free (line_input); return error; } #endif static clib_error_t * map_icmp_relay_source_address_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; ip4_address_t icmp_src_address; ip4_address_t *p_icmp_addr = 0; map_main_t *mm = &map_main; clib_error_t *error = NULL; mm->icmp4_src_address.as_u32 = 0; /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) return 0; while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "%U", unformat_ip4_address, &icmp_src_address)) { mm->icmp4_src_address = icmp_src_address; p_icmp_addr = &icmp_src_address; } else { error = clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); goto done; } } map_param_set_icmp (p_icmp_addr); done: unformat_free (line_input); return error; } static clib_error_t * map_icmp_unreachables_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; int num_m_args = 0; clib_error_t *error = NULL; bool enabled = false; /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) return 0; while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { num_m_args++; if (unformat (line_input, "on")) enabled = true; else if (unformat (line_input, "off")) enabled = false; else { error = clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); goto done; } } if (num_m_args != 1) error = clib_error_return (0, "mandatory argument(s) missing"); map_param_set_icmp6 (enabled); done: unformat_free (line_input); return error; } static clib_error_t * map_fragment_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; clib_error_t *error = NULL; bool frag_inner = false; bool frag_ignore_df = false; bool saw_in_out = false; bool saw_df = false; /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) return 0; while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "inner")) { frag_inner = true; saw_in_out = true; } else if (unformat (line_input, "outer")) { frag_inner = false; saw_in_out = true; } else if (unformat (line_input, "ignore-df")) { frag_ignore_df = true; saw_df = true; } else if (unformat (line_input, "honor-df")) { frag_ignore_df = false; saw_df = true; } else { error = clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); goto done; } } if (!saw_in_out) { error = clib_error_return (0, "Must specify 'inner' or 'outer'"); goto done; } if (!saw_df) { error = clib_error_return (0, "Must specify 'ignore-df' or 'honor-df'"); goto done; } map_param_set_fragmentation (frag_inner, frag_ignore_df); done: unformat_free (line_input); return error; } static clib_error_t * map_traffic_class_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; u32 tc = 0; clib_error_t *error = NULL; bool tc_copy = false; /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) return 0; while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "copy")) tc_copy = true; else if (unformat (line_input, "%x", &tc)) tc = tc & 0xff; else { error = clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); goto done; } } map_param_set_traffic_class (tc_copy, tc); done: unformat_free (line_input); return error; } static char * map_flags_to_string (u32 flags) { if (flags & MAP_DOMAIN_PREFIX) return "prefix"; return ""; } static u8 * format_map_domain (u8 * s, va_list * args) { map_domain_t *d = va_arg (*args, map_domain_t *); bool counters = va_arg (*args, int); map_main_t *mm = &map_main; ip6_address_t ip6_prefix; u32 map_domain_index = d - mm->domains; map_domain_extra_t *de = 0; if (d->rules) clib_memset (&ip6_prefix, 0, sizeof (ip6_prefix)); else ip6_prefix = d->ip6_prefix; if (map_domain_index < vec_len (mm->domain_extras)) de = vec_elt_at_index (mm->domain_extras, map_domain_index); s = format (s, "[%d] tag {%s} ip4-pfx %U/%d ip6-pfx %U/%d ip6-src %U/%d " "ea-bits-len %d psid-offset %d psid-len %d mtu %d %s", map_domain_index, (de && de->tag) ? de->tag : (u8 *) "[no-tag]", format_ip4_address, &d->ip4_prefix, d->ip4_prefix_len, format_ip6_address, &ip6_prefix, d->ip6_prefix_len, format_ip6_address, &d->ip6_src, d->ip6_src_len, d->ea_bits_len, d->psid_offset, d->psid_length, d->mtu, map_flags_to_string (d->flags)); if (counters) { map_domain_counter_lock (mm); vlib_counter_t v; vlib_get_combined_counter (&mm->domain_counters[MAP_DOMAIN_COUNTER_TX], map_domain_index, &v); s = format (s, " TX: %lld/%lld", v.packets, v.bytes); vlib_get_combined_counter (&mm->domain_counters[MAP_DOMAIN_COUNTER_RX], map_domain_index, &v); s = format (s, " RX: %lld/%lld", v.packets, v.bytes); map_domain_counter_unlock (mm); } s = format (s, "\n"); if (d->rules) { int i; ip6_address_t dst; for (i = 0; i < (0x1 << d->psid_length); i++) { dst = d->rules[i]; if (dst.as_u64[0] == 0 && dst.as_u64[1] == 0) continue; s = format (s, " rule psid: %d ip6-dst %U\n", i, format_ip6_address, &dst); } } return s; } static clib_error_t * show_map_domain_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; map_main_t *mm = &map_main; map_domain_t *d; bool counters = false; u32 map_domain_index = ~0; clib_error_t *error = NULL; /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) { pool_foreach (d, mm->domains) {vlib_cli_output(vm, "%U", format_map_domain, d, counters);} return 0; } while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "counters")) counters = true; else if (unformat (line_input, "index %d", &map_domain_index)) ; else { error = clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); goto done; } } if (pool_elts (mm->domains) == 0) { vlib_cli_output (vm, "No MAP domains are configured..."); goto done; } if (map_domain_index == ~0) { pool_foreach (d, mm->domains) {vlib_cli_output(vm, "%U", format_map_domain, d, counters);} } else { if (pool_is_free_index (mm->domains, map_domain_index)) { error = clib_error_return (0, "MAP domain does not exists %d", map_domain_index); goto done; } d = pool_elt_at_index (mm->domains, map_domain_index); vlib_cli_output (vm, "%U", format_map_domain, d, counters); } done: unformat_free (line_input); return error; } u64 map_error_counter_get (u32 node_index, map_error_t map_error) { vlib_main_t *vm = vlib_get_main (); vlib_node_runtime_t *error_node = vlib_node_get_runtime (vm, node_index); vlib_error_main_t *em = &vm->error_main; vlib_error_t e = error_node->errors[map_error]; vlib_node_t *n = vlib_get_node (vm, node_index); u32 ci; ci = vlib_error_get_code (&vm->node_main, e); ASSERT (ci < n->n_errors); ci += n->error_heap_index; return (em->counters[ci]); } static clib_error_t * show_map_stats_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { map_main_t *mm = &map_main; map_domain_t *d; int domains = 0, rules = 0, domaincount = 0, rulecount = 0; if (pool_elts (mm->domains) == 0) { vlib_cli_output (vm, "No MAP domains are configured..."); return 0; } pool_foreach (d, mm->domains) { if (d->rules) { rulecount+= 0x1 << d->psid_length; rules += sizeof(ip6_address_t) * 0x1 << d->psid_length; } domains += sizeof(*d); domaincount++; } vlib_cli_output (vm, "MAP domains structure: %d\n", sizeof (map_domain_t)); vlib_cli_output (vm, "MAP domains: %d (%d bytes)\n", domaincount, domains); vlib_cli_output (vm, "MAP rules: %d (%d bytes)\n", rulecount, rules); vlib_cli_output (vm, "Total: %d bytes)\n", rules + domains); #if MAP_SKIP_IP6_LOOKUP vlib_cli_output (vm, "MAP pre-resolve: IP6 next-hop: %U, IP4 next-hop: %U\n", format_map_pre_resolve, &pre_resolved[FIB_PROTOCOL_IP6], format_map_pre_resolve, &pre_resolved[FIB_PROTOCOL_IP4]); #endif if (mm->tc_copy) vlib_cli_output (vm, "MAP traffic-class: copy"); else vlib_cli_output (vm, "MAP traffic-class: %x", mm->tc); if (mm->tcp_mss) vlib_cli_output (vm, "MAP TCP MSS clamping: %u", mm->tcp_mss); vlib_cli_output (vm, "MAP IPv6 inbound security check: %s, fragmented packet security check: %s", mm->sec_check ? "enabled" : "disabled", mm->sec_check_frag ? "enabled" : "disabled"); vlib_cli_output (vm, "ICMP-relay IPv4 source address: %U\n", format_ip4_address, &mm->icmp4_src_address); vlib_cli_output (vm, "ICMP6 unreachables sent for unmatched packets: %s\n", mm->icmp6_enabled ? "enabled" : "disabled"); vlib_cli_output (vm, "Inner fragmentation: %s\n", mm->frag_inner ? "enabled" : "disabled"); vlib_cli_output (vm, "Fragment packets regardless of DF flag: %s\n", mm->frag_ignore_df ? "enabled" : "disabled"); /* * Counters */ vlib_combined_counter_main_t *cm = mm->domain_counters; u64 total_pkts[MAP_N_DOMAIN_COUNTER]; u64 total_bytes[MAP_N_DOMAIN_COUNTER]; int which, i; vlib_counter_t v; clib_memset (total_pkts, 0, sizeof (total_pkts)); clib_memset (total_bytes, 0, sizeof (total_bytes)); map_domain_counter_lock (mm); vec_foreach (cm, mm->domain_counters) { which = cm - mm->domain_counters; for (i = 0; i < vlib_combined_counter_n_counters (cm); i++) { vlib_get_combined_counter (cm, i, &v); total_pkts[which] += v.packets; total_bytes[which] += v.bytes; } } map_domain_counter_unlock (mm); vlib_cli_output (vm, "Encapsulated packets: %lld bytes: %lld\n", total_pkts[MAP_DOMAIN_COUNTER_TX], total_bytes[MAP_DOMAIN_COUNTER_TX]); vlib_cli_output (vm, "Decapsulated packets: %lld bytes: %lld\n", total_pkts[MAP_DOMAIN_COUNTER_RX], total_bytes[MAP_DOMAIN_COUNTER_RX]); vlib_cli_output (vm, "ICMP relayed packets: %d\n", vlib_get_simple_counter (&mm->icmp_relayed, 0)); return 0; } static clib_error_t * map_if_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; clib_error_t *error = NULL; bool is_enable = true, is_translation = false; vnet_main_t *vnm = vnet_get_main (); u32 sw_if_index = ~0; /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) return 0; while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index)) ; else if (unformat (line_input, "del")) is_enable = false; else if (unformat (line_input, "map-t")) is_translation = true; else { error = clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); goto done; } } done: unformat_free (line_input); if (sw_if_index == ~0) { error = clib_error_return (0, "unknown interface"); return error; } int rv = map_if_enable_disable (is_enable, sw_if_index, is_translation); if (rv) { error = clib_error_return (0, "failure enabling MAP on interface"); } return error; } /* * packet trace format function */ u8 * format_map_trace (u8 * s, va_list * args) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); map_trace_t *t = va_arg (*args, map_trace_t *); u32 map_domain_index = t->map_domain_index; u16 port = t->port; s = format (s, "MAP domain index: %d L4 port: %u", map_domain_index, clib_net_to_host_u16 (port)); return s; } static clib_error_t * map_tcp_mss_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; clib_error_t *error = NULL; u32 tcp_mss = 0; /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) return 0; while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "%u", &tcp_mss)) ; else { error = clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); goto done; } } if (tcp_mss >= (0x1 << 16)) { error = clib_error_return (0, "invalid value `%u'", tcp_mss); goto done; } map_param_set_tcp (tcp_mss); done: unformat_free (line_input); return error; } /*? * Set or copy the IP TOS/Traffic Class field * * @cliexpar * @cliexstart{map params traffic-class} * * This command is used to set the traffic-class field in translated * or encapsulated packets. If copy is specifed (the default) then the * traffic-class/TOS field is copied from the original packet to the * translated / encapsulating header. * @cliexend ?*/ VLIB_CLI_COMMAND(map_traffic_class_command, static) = { .path = "map params traffic-class", .short_help = "map params traffic-class {0x0-0xff | copy}", .function = map_traffic_class_command_fn, }; /*? * TCP MSS clamping * * @cliexpar * @cliexstart{map params tcp-mss} * * This command is used to set the TCP MSS in translated * or encapsulated packets. * @cliexend ?*/ VLIB_CLI_COMMAND(map_tcp_mss_command, static) = { .path = "map params tcp-mss", .short_help = "map params tcp-mss ", .function = map_tcp_mss_command_fn, }; /*? * Bypass IP4/IP6 lookup * * @cliexpar * @cliexstart{map params pre-resolve} * * Bypass a second FIB lookup of the translated or encapsulated * packet, and forward the packet directly to the specified * next-hop. This optimization trades forwarding flexibility for * performance. * @cliexend ?*/ VLIB_CLI_COMMAND(map_pre_resolve_command, static) = { .path = "map params pre-resolve", .short_help = " map params pre-resolve {ip4-nh
} " "| {ip6-nh
}", .function = map_pre_resolve_command_fn, }; /*? * Enable or disable the MAP-E inbound security check * Specify if the inbound security check should be done on fragments * * @cliexpar * @cliexstart{map params security-check} * * By default, a decapsulated packet's IPv4 source address will be * verified against the outer header's IPv6 source address. Disabling * this feature will allow IPv4 source address spoofing. * * Typically the inbound on-decapsulation security check is only done * on the first packet. The packet that contains the L4 * information. While a security check on every fragment is possible, * it has a cost. State must be created on the first fragment. * @cliexend ?*/ VLIB_CLI_COMMAND(map_security_check_command, static) = { .path = "map params security-check", .short_help = "map params security-check enable|disable fragments on|off", .function = map_security_check_command_fn, }; /*? * Specify the IPv4 source address used for relayed ICMP error messages * * @cliexpar * @cliexstart{map params icmp source-address} * * This command specifies which IPv4 source address (must be local to * the system), that is used for relayed received IPv6 ICMP error * messages. * @cliexend ?*/ VLIB_CLI_COMMAND(map_icmp_relay_source_address_command, static) = { .path = "map params icmp source-address", .short_help = "map params icmp source-address ", .function = map_icmp_relay_source_address_command_fn, }; /*? * Send IPv6 ICMP unreachables * * @cliexpar * @cliexstart{map params icmp6 unreachables} * * Send IPv6 ICMP unreachable messages back if security check fails or * no MAP domain exists. * @cliexend ?*/ VLIB_CLI_COMMAND(map_icmp_unreachables_command, static) = { .path = "map params icmp6 unreachables", .short_help = "map params icmp6 unreachables {on|off}", .function = map_icmp_unreachables_command_fn, }; /*? * Configure MAP fragmentation behaviour * * @cliexpar * @cliexstart{map params fragment} * * Allows fragmentation of the IPv4 packet even if the DF bit is * set. The choice between inner or outer fragmentation of tunnel * packets is complicated. The benefit of inner fragmentation is that * the ultimate endpoint must reassemble, instead of the tunnel * endpoint. * @cliexend ?*/ VLIB_CLI_COMMAND(map_fragment_command, static) = { .path = "map params fragment", .short_help = "map params fragment inner|outer ignore-df|honor-df", .function = map_fragment_command_fn, }; /*? * Add MAP domain * * @cliexpar * @cliexstart{map add domain} * @cliexend ?*/ VLIB_CLI_COMMAND(map_add_domain_command, static) = { .path = "map add domain", .short_help = "map add domain [tag ] ip4-pfx " "ip6-pfx " "ip6-src ea-bits-len psid-offset psid-len " "[map-t] [mtu ]", .function = map_add_domain_command_fn, }; /*? * Add MAP rule to a domain * * @cliexpar * @cliexstart{map add rule} * @cliexend ?*/ VLIB_CLI_COMMAND(map_add_rule_command, static) = { .path = "map add rule", .short_help = "map add rule index psid ip6-dst ", .function = map_add_rule_command_fn, }; /*? * Delete MAP domain * * @cliexpar * @cliexstart{map del domain} * @cliexend ?*/ VLIB_CLI_COMMAND(map_del_command, static) = { .path = "map del domain", .short_help = "map del domain index ", .function = map_del_domain_command_fn, }; /*? * Show MAP domains * * @cliexpar * @cliexstart{show map domain} * @cliexend ?*/ VLIB_CLI_COMMAND(show_map_domain_command, static) = { .path = "show map domain", .short_help = "show map domain index [counters]", .function = show_map_domain_command_fn, }; /*? * Show MAP statistics * * @cliexpar * @cliexstart{show map stats} * @cliexend ?*/ VLIB_CLI_COMMAND(show_map_stats_command, static) = { .path = "show map stats", .short_help = "show map stats", .function = show_map_stats_command_fn, }; /*? * Enable MAP processing on interface (input feature) * ?*/ VLIB_CLI_COMMAND(map_if_command, static) = { .path = "map interface", .short_help = "map interface [map-t] [del]", .function = map_if_command_fn, }; VLIB_PLUGIN_REGISTER() = { .version = VPP_BUILD_VER, .description = "Mapping of Address and Port (MAP)", }; /* * map_init */ clib_error_t * map_init (vlib_main_t * vm) { map_main_t *mm = &map_main; clib_error_t *error = 0; memset (mm, 0, sizeof (*mm)); mm->vnet_main = vnet_get_main (); mm->vlib_main = vm; #ifdef MAP_SKIP_IP6_LOOKUP fib_protocol_t proto; FOR_EACH_FIB_PROTOCOL (proto) { map_pre_resolve_init (&pre_resolved[proto]); } #endif /* traffic class */ mm->tc = 0; mm->tc_copy = true; /* Inbound security check */ mm->sec_check = true; mm->sec_check_frag = false; /* ICMP6 Type 1, Code 5 for security check failure */ mm->icmp6_enabled = false; /* Inner or outer fragmentation */ mm->frag_inner = false; mm->frag_ignore_df = false; vec_validate (mm->domain_counters, MAP_N_DOMAIN_COUNTER - 1); mm->domain_counters[MAP_DOMAIN_COUNTER_RX].name = "/map/rx"; mm->domain_counters[MAP_DOMAIN_COUNTER_TX].name = "/map/tx"; vlib_validate_simple_counter (&mm->icmp_relayed, 0); vlib_zero_simple_counter (&mm->icmp_relayed, 0); mm->icmp_relayed.stat_segment_name = "/map/icmp-relayed"; /* IP6 virtual reassembly */ #ifdef MAP_SKIP_IP6_LOOKUP fib_node_register_type (FIB_NODE_TYPE_MAP_E, &map_vft); #endif /* LPM lookup tables */ mm->ip4_prefix_tbl = lpm_table_init (LPM_TYPE_KEY32); mm->ip6_prefix_tbl = lpm_table_init (LPM_TYPE_KEY128); mm->ip6_src_prefix_tbl = lpm_table_init (LPM_TYPE_KEY128); mm->bm_trans_enabled_by_sw_if = 0; mm->bm_encap_enabled_by_sw_if = 0; error = map_plugin_api_hookup (vm); return error; } VLIB_INIT_FUNCTION (map_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */