/* * decap.c : IPSec tunnel 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 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]; } int ipsec_set_interface_spd (vlib_main_t * vm, u32 sw_if_index, u32 spd_id, int is_add) { ipsec_main_t *im = &ipsec_main; ip4_ipsec_config_t config; u32 spd_index; uword *p; p = hash_get (im->spd_index_by_spd_id, spd_id); if (!p) return VNET_API_ERROR_SYSCALL_ERROR_1; /* no such spd-id */ spd_index = p[0]; p = hash_get (im->spd_index_by_sw_if_index, sw_if_index); if (p && is_add) return VNET_API_ERROR_SYSCALL_ERROR_1; /* spd already assigned */ if (is_add) { hash_set (im->spd_index_by_sw_if_index, sw_if_index, spd_index); } else { hash_unset (im->spd_index_by_sw_if_index, sw_if_index); } clib_warning ("sw_if_index %u spd_id %u spd_index %u", sw_if_index, spd_id, spd_index); /* enable IPsec on TX */ vnet_feature_enable_disable ("ip4-output", "ipsec-output-ip4", sw_if_index, is_add, 0, 0); vnet_feature_enable_disable ("ip6-output", "ipsec-output-ip6", sw_if_index, is_add, 0, 0); /* enable IPsec on RX */ vnet_feature_enable_disable ("ip4-unicast", "ipsec-input-ip4", sw_if_index, is_add, &config, sizeof (config)); vnet_feature_enable_disable ("ip6-unicast", "ipsec-input-ip6", sw_if_index, is_add, &config, sizeof (config)); return 0; } int ipsec_add_del_spd (vlib_main_t * vm, u32 spd_id, int is_add) { ipsec_main_t *im = &ipsec_main; ipsec_spd_t *spd = 0; uword *p; u32 spd_index, k, v; p = hash_get (im->spd_index_by_spd_id, spd_id); if (p && is_add) return VNET_API_ERROR_INVALID_VALUE; if (!p && !is_add) return VNET_API_ERROR_INVALID_VALUE; if (!is_add) /* delete */ { spd_index = p[0]; spd = pool_elt_at_index (im->spds, spd_index); if (!spd) return VNET_API_ERROR_INVALID_VALUE; /* *INDENT-OFF* */ hash_foreach (k, v, im->spd_index_by_sw_if_index, ({ if (v == spd_index) ipsec_set_interface_spd(vm, k, spd_id, 0); })); /* *INDENT-ON* */ hash_unset (im->spd_index_by_spd_id, spd_id); pool_free (spd->policies); vec_free (spd->ipv4_outbound_policies); vec_free (spd->ipv6_outbound_policies); vec_free (spd->ipv4_inbound_protect_policy_indices); vec_free (spd->ipv4_inbound_policy_discard_and_bypass_indices); pool_put (im->spds, spd); } else /* create new SPD */ { pool_get (im->spds, spd); memset (spd, 0, sizeof (*spd)); spd_index = spd - im->spds; spd->id = spd_id; hash_set (im->spd_index_by_spd_id, spd_id, spd_index); } return 0; } static int ipsec_spd_entry_sort (void *a1, void *a2) { ipsec_main_t *im = &ipsec_main; u32 *id1 = a1; u32 *id2 = a2; ipsec_spd_t *spd; ipsec_policy_t *p1, *p2; /* *INDENT-OFF* */ pool_foreach (spd, im->spds, ({ p1 = pool_elt_at_index(spd->policies, *id1); p2 = pool_elt_at_index(spd->policies, *id2); if (p1 && p2) return p2->priority - p1->priority; })); /* *INDENT-ON* */ return 0; } int ipsec_add_del_policy (vlib_main_t * vm, ipsec_policy_t * policy, int is_add) { ipsec_main_t *im = &ipsec_main; ipsec_spd_t *spd = 0; ipsec_policy_t *vp; uword *p; u32 spd_index; clib_warning ("policy-id %u priority %d is_outbound %u", policy->id, policy->priority, policy->is_outbound); if (policy->policy == IPSEC_POLICY_ACTION_PROTECT) { p = hash_get (im->sa_index_by_sa_id, policy->sa_id); if (!p) return VNET_API_ERROR_SYSCALL_ERROR_1; policy->sa_index = p[0]; } p = hash_get (im->spd_index_by_spd_id, policy->id); if (!p) return VNET_API_ERROR_SYSCALL_ERROR_1; spd_index = p[0]; spd = pool_elt_at_index (im->spds, spd_index); if (!spd) return VNET_API_ERROR_SYSCALL_ERROR_1; if (is_add) { u32 policy_index; pool_get (spd->policies, vp); clib_memcpy (vp, policy, sizeof (*vp)); policy_index = vp - spd->policies; if (policy->is_outbound) { if (policy->is_ipv6) { vec_add1 (spd->ipv6_outbound_policies, policy_index); clib_memcpy (vp, policy, sizeof (ipsec_policy_t)); vec_sort_with_function (spd->ipv6_outbound_policies, ipsec_spd_entry_sort); } else { vec_add1 (spd->ipv4_outbound_policies, policy_index); clib_memcpy (vp, policy, sizeof (ipsec_policy_t)); vec_sort_with_function (spd->ipv4_outbound_policies, ipsec_spd_entry_sort); } } else { if (policy->is_ipv6) { if (policy->policy == IPSEC_POLICY_ACTION_PROTECT) { vec_add1 (spd->ipv6_inbound_protect_policy_indices, policy_index); clib_memcpy (vp, policy, sizeof (ipsec_policy_t)); vec_sort_with_function (spd->ipv6_inbound_protect_policy_indices, ipsec_spd_entry_sort); } else { vec_add1 (spd->ipv6_inbound_policy_discard_and_bypass_indices, policy_index); clib_memcpy (vp, policy, sizeof (ipsec_policy_t)); vec_sort_with_function (spd->ipv6_inbound_policy_discard_and_bypass_indices, ipsec_spd_entry_sort); } } else { if (policy->policy == IPSEC_POLICY_ACTION_PROTECT) { vec_add1 (spd->ipv4_inbound_protect_policy_indices, policy_index); clib_memcpy (vp, policy, sizeof (ipsec_policy_t)); vec_sort_with_function (spd->ipv4_inbound_protect_policy_indices, ipsec_spd_entry_sort); } else { vec_add1 (spd->ipv4_inbound_policy_discard_and_bypass_indices, policy_index); clib_memcpy (vp, policy, sizeof (ipsec_policy_t)); vec_sort_with_function (spd->ipv4_inbound_policy_discard_and_bypass_indices, ipsec_spd_entry_sort); } } } } else { u32 i, j; /* *INDENT-OFF* */ pool_foreach_index(i, spd->policies, ({ vp = pool_elt_at_index(spd->policies, i); if (vp->priority != policy->priority) continue; if (vp->is_outbound != policy->is_outbound) continue; if (vp->policy != policy->policy) continue; if (vp->sa_id != policy->sa_id) continue; if (vp->protocol != policy->protocol) continue; if (vp->lport.start != policy->lport.start) continue; if (vp->lport.stop != policy->lport.stop) continue; if (vp->rport.start != policy->rport.start) continue; if (vp->rport.stop != policy->rport.stop) continue; if (vp->is_ipv6 != policy->is_ipv6) continue; if (policy->is_ipv6) { if (vp->laddr.start.ip6.as_u64[0] != policy->laddr.start.ip6.as_u64[0]) continue; if (vp->laddr.start.ip6.as_u64[1] != policy->laddr.start.ip6.as_u64[1]) continue; if (vp->laddr.stop.ip6.as_u64[0] != policy->laddr.stop.ip6.as_u64[0]) continue; if (vp->laddr.stop.ip6.as_u64[1] != policy->laddr.stop.ip6.as_u64[1]) continue; if (vp->raddr.start.ip6.as_u64[0] != policy->raddr.start.ip6.as_u64[0]) continue; if (vp->raddr.start.ip6.as_u64[1] != policy->raddr.start.ip6.as_u64[1]) continue; if (vp->raddr.stop.ip6.as_u64[0] != policy->raddr.stop.ip6.as_u64[0]) continue; if (vp->laddr.stop.ip6.as_u64[1] != policy->laddr.stop.ip6.as_u64[1]) continue; if (policy->is_outbound) { vec_foreach_index(j, spd->ipv6_outbound_policies) { if (vec_elt(spd->ipv6_outbound_policies, j) == i) { vec_del1 (spd->ipv6_outbound_policies, j); break; } } } else { if (policy->policy == IPSEC_POLICY_ACTION_PROTECT) { vec_foreach_index(j, spd->ipv6_inbound_protect_policy_indices) { if (vec_elt(spd->ipv6_inbound_protect_policy_indices, j) == i) { vec_del1 (spd->ipv6_inbound_protect_policy_indices, j); break; } } } else { vec_foreach_index(j, spd->ipv6_inbound_policy_discard_and_bypass_indices) { if (vec_elt(spd->ipv6_inbound_policy_discard_and_bypass_indices, j) == i) { vec_del1 (spd->ipv6_inbound_policy_discard_and_bypass_indices, j); break; } } } } } else { if (vp->laddr.start.ip4.as_u32 != policy->laddr.start.ip4.as_u32) continue; if (vp->laddr.stop.ip4.as_u32 != policy->laddr.stop.ip4.as_u32) continue; if (vp->raddr.start.ip4.as_u32 != policy->raddr.start.ip4.as_u32) continue; if (vp->raddr.stop.ip4.as_u32 != policy->raddr.stop.ip4.as_u32) continue; if (policy->is_outbound) { vec_foreach_index(j, spd->ipv4_outbound_policies) { if (vec_elt(spd->ipv4_outbound_policies, j) == i) { vec_del1 (spd->ipv4_outbound_policies, j); break; } } } else { if (policy->policy == IPSEC_POLICY_ACTION_PROTECT) { vec_foreach_index(j, spd->ipv4_inbound_protect_policy_indices) { if (vec_elt(spd->ipv4_inbound_protect_policy_indices, j) == i) { vec_del1 (spd->ipv4_inbound_protect_policy_indices, j); break; } } } else { vec_foreach_index(j, spd->ipv4_inbound_policy_discard_and_bypass_indices) { if (vec_elt(spd->ipv4_inbound_policy_discard_and_bypass_indices, j) == i) { vec_del1 (spd->ipv4_inbound_policy_discard_and_bypass_indices, j); break; } } } } pool