/* * Copyright (c) 2018 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/vnet.h> #include <vlibmemory/api.h> #include <dhcp/dhcp6_packet.h> #include <dhcp/dhcp6_pd_client_dp.h> #include <vnet/ip/ip.h> #include <vnet/ip/ip6.h> #include <vnet/ip/ip6_link.h> #include <vnet/ip6-nd/ip6_ra.h> #include <float.h> #include <math.h> #include <string.h> #include <vnet/ip/ip_types_api.h> typedef struct { u32 prefix_group_index; uword opaque_data; // used by prefix publisher ip6_address_t prefix; u8 prefix_length; u32 preferred_lt; u32 valid_lt; f64 due_time; } prefix_info_t; typedef struct { u8 enabled; u32 prefix_group_index; u32 server_index; u32 T1; u32 T2; f64 T1_due_time; f64 T2_due_time; u32 prefix_count; u8 rebinding; } client_state_t; typedef struct { client_state_t *client_state_by_sw_if_index; clib_bitmap_t *prefix_ownership_bitmap; u32 n_clients; f64 max_valid_due_time; /* convenience */ vlib_main_t *vlib_main; vnet_main_t *vnet_main; api_main_t *api_main; u32 node_index; } dhcp6_pd_client_cp_main_t; static dhcp6_pd_client_cp_main_t dhcp6_pd_client_cp_main; typedef struct { prefix_info_t *prefix_pool; const u8 **prefix_group_name_by_index; /* vector of active prefix pool indicies, prep-H for pool_foreach(..) */ u32 *indices; } ip6_prefix_main_t; static ip6_prefix_main_t ip6_prefix_main; typedef struct { /* config */ u32 sw_if_index; u32 prefix_group_index; ip6_address_t address; u8 prefix_length; /* state */ u8 configured_in_data_plane; } ip6_address_info_t; typedef struct { ip6_address_info_t *addresses; u32 *active_prefix_index_by_prefix_group_index; } ip6_address_with_prefix_main_t; static ip6_address_with_prefix_main_t ip6_address_with_prefix_main; enum { DHCPV6_PD_EVENT_INTERRUPT, DHCPV6_PD_EVENT_DISABLE, }; static_always_inline u32 active_prefix_index_by_prefix_group_index_get (u32 prefix_group_index) { ip6_address_with_prefix_main_t *apm = &ip6_address_with_prefix_main; if (prefix_group_index >= vec_len (apm->active_prefix_index_by_prefix_group_index)) return ~0; return apm->active_prefix_index_by_prefix_group_index[prefix_group_index]; } static_always_inline void active_prefix_index_by_prefix_group_index_set (u32 prefix_group_index, u32 prefix_index) { ip6_address_with_prefix_main_t *apm = &ip6_address_with_prefix_main; static const u32 empty = ~0; ASSERT (prefix_group_index != ~0); if (prefix_index == ~0 && prefix_group_index >= vec_len (apm->active_prefix_index_by_prefix_group_index)) return; vec_validate_init_empty (apm->active_prefix_index_by_prefix_group_index, prefix_group_index, empty); apm->active_prefix_index_by_prefix_group_index[prefix_group_index] = prefix_index; } static_always_inline u8 is_dhcpv6_pd_prefix (prefix_info_t * prefix_info) { dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main; ip6_prefix_main_t *pm = &ip6_prefix_main; u32 prefix_index; prefix_index = prefix_info - pm->prefix_pool; return clib_bitmap_get (rm->prefix_ownership_bitmap, prefix_index); } static_always_inline void set_is_dhcpv6_pd_prefix (prefix_info_t * prefix_info, u8 value) { dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main; ip6_prefix_main_t *pm = &ip6_prefix_main; u32 prefix_index; prefix_index = prefix_info - pm->prefix_pool; rm->prefix_ownership_bitmap = clib_bitmap_set (rm->prefix_ownership_bitmap, prefix_index, value); } static void cp_ip6_address_prefix_add_del_handler (u32 prefix_index, u8 is_add); static void notify_prefix_add_del (u32 prefix_index, u8 is_add) { // TODO: use registries cp_ip6_address_prefix_add_del_handler (prefix_index, is_add); } static void send_client_message_start_stop (u32 sw_if_index, u32 server_index, u8 msg_type, prefix_info_t * prefix_list, u8 start) { dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main; dhcp6_pd_send_client_message_params_t params = { 0, }; dhcp6_pd_send_client_message_params_prefix_t *prefixes = 0, *pref; u32 i; ASSERT (sw_if_index < vec_len (rm->client_state_by_sw_if_index) && rm->client_state_by_sw_if_index[sw_if_index].enabled); client_state_t *client_state = &rm->client_state_by_sw_if_index[sw_if_index]; params.sw_if_index = sw_if_index; params.server_index = server_index; params.msg_type = msg_type; if (start) { if (msg_type == DHCPV6_MSG_SOLICIT) { params.irt = 1; params.mrt = 120; } else if (msg_type == DHCPV6_MSG_REQUEST) { params.irt = 1; params.mrt = 30; params.mrc = 10; } else if (msg_type == DHCPV6_MSG_RENEW) { params.irt = 10; params.mrt = 600; f64 current_time = vlib_time_now (rm->vlib_main); i32 diff_time = client_state->T2 - current_time; if (diff_time < 0) diff_time = 0; params.mrd = diff_time; } else if (msg_type == DHCPV6_MSG_REBIND) { params.irt = 10; params.mrt = 600; f64 current_time = vlib_time_now (rm->vlib_main); i32 diff_time = rm->max_valid_due_time - current_time; if (diff_time < 0) diff_time = 0; params.mrd = diff_time; } else if (msg_type == DHCPV6_MSG_RELEASE) { params.mrc = 1; } } params.T1 = 0; params.T2 = 0; if (vec_len (prefix_list) != 0) vec_validate (prefixes, vec_len (prefix_list) - 1); for (i = 0; i < vec_len (prefix_list); i++) { prefix_info_t *prefix = &prefix_list[i]; pref = &prefixes[i]; pref->valid_lt = prefix->valid_lt; pref->preferred_lt = prefix->preferred_lt; pref->prefix = prefix->prefix; pref->prefix_length = prefix->prefix_length; } params.prefixes = prefixes; dhcp6_pd_send_client_message (rm->vlib_main, sw_if_index, !start, ¶ms); vec_free (params.prefixes); } static void interrupt_process (void); static u8 ip6_prefixes_equal (ip6_address_t * prefix1, ip6_address_t * prefix2, u8 len) { if (len >= 64) { if (prefix1->as_u64[0] != prefix2->as_u64[0]) return 0; if (len == 64) return 1; return clib_net_to_host_u64 (prefix1->as_u64[1]) >> (128 - len) == clib_net_to_host_u64 (prefix2->as_u64[1]) >> (128 - len); } return clib_net_to_host_u64 (prefix1->as_u64[0]) >> (64 - len) == clib_net_to_host_u64 (prefix2->as_u64[0]) >> (64 - len); } static clib_error_t * dhcp6_pd_reply_event_handler (vl_api_dhcp6_pd_reply_event_t * mp) { dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main; ip6_prefix_main_t *pm = &ip6_prefix_main; vlib_main_t *vm = rm->vlib_main; client_state_t *client_state; ip6_address_t *prefix; u32 sw_if_index; u32 n_prefixes; vl_api_dhcp6_pd_prefix_info_t *api_prefix; u32 inner_status_code; u32 status_code; u32 server_index; f64 current_time; clib_error_t *error = 0; u32 i; prefix_info_t *prefix_info; current_time = vlib_time_now (vm); sw_if_index = ntohl (mp->sw_if_index); if (sw_if_index >= vec_len (rm->client_state_by_sw_if_index)) return 0; client_state = &rm->client_state_by_sw_if_index[sw_if_index]; if (!client_state->enabled) return 0; server_index = ntohl (mp->server_index); n_prefixes = ntohl (mp->n_prefixes); inner_status_code = ntohs (mp->inner_status_code); status_code = ntohs (mp->status_code); if (mp->msg_type == DHCPV6_MSG_API_ADVERTISE && client_state->server_index == ~0) { prefix_info_t *prefix_list = 0, *prefix_info; u8 prefix_length; if (inner_status_code == DHCPV6_STATUS_NOPREFIX_AVAIL) { clib_warning ("Advertise message arrived with NoPrefixAvail status code"); return 0; } if (n_prefixes > 0) vec_validate (prefix_list, n_prefixes - 1); for (i = 0; i < n_prefixes; i++) { api_prefix = &mp->prefixes[i]; prefix = (ip6_address_t *) api_prefix->prefix.address; prefix_length = api_prefix->prefix.len; prefix_info = &prefix_list[i]; prefix_info->prefix = *prefix; prefix_info->prefix_length = prefix_length; prefix_info->preferred_lt = 0; prefix_info->valid_lt = 0; } client_state->server_index = server_index; send_client_message_start_stop (sw_if_index, server_index, DHCPV6_MSG_REQUEST, prefix_list, 1); vec_free (prefix_list); } if (mp->msg_type != DHCPV6_MSG_API_REPLY) return 0; if (!client_state->rebinding && client_state->server_index != server_index) { clib_warning ("Reply message arrived with Server ID different " "from that in Request or Renew message"); return 0; } if (inner_status_code == DHCPV6_STATUS_NOPREFIX_AVAIL) { clib_warning ("Reply message arrived with NoPrefixAvail status code"); if (n_prefixes > 0) { clib_warning ("Invalid Reply message arrived: It contains NoPrefixAvail " "status code but also contains prefixes"); return 0; } } if (status_code == DHCPV6_STATUS_UNSPEC_FAIL) { clib_warning ("Reply message arrived with UnspecFail status code"); return 0; } send_client_message_start_stop (sw_if_index, server_index, mp->msg_type, 0, 0); vec_reset_length (pm->indices); /* * We're going to loop through the pool multiple times, * so collect active indices. */ /* *INDENT-OFF* */ pool_foreach (prefix_info, pm->prefix_pool, ({ vec_add1 (pm->indices, prefix_info - pm->prefix_pool); })); /* *INDENT-ON* */ for (i = 0; i < n_prefixes; i++) { u8 prefix_length; u32 valid_time; u32 preferred_time; int j; prefix_info = 0; api_prefix = &mp->prefixes[i]; prefix = (ip6_address_t *) api_prefix->prefix.address; prefix_length = api_prefix->prefix.len; if (ip6_address_is_link_local_unicast (prefix)) continue; valid_time = ntohl (api_prefix->valid_time); preferred_time = ntohl (api_prefix->preferred_time); prefix_length = api_prefix->prefix.len; if (preferred_time > valid_time) continue; u8 address_prefix_present = 0; /* Look for a matching prefix_info */ for (j = 0; j < vec_len (pm->indices); j++) { prefix_info = pool_elt_at_index (pm->prefix_pool, pm->indices[j]); if (is_dhcpv6_pd_prefix (prefix_info) && prefix_info->opaque_data == sw_if_index && prefix_info->prefix_length == prefix_length && ip6_prefixes_equal (&prefix_info->prefix, prefix, prefix_length)) { address_prefix_present = 1; break; } } if (address_prefix_present) { /* Found the (primary) prefix, update prefix timers */ prefix_info->preferred_lt = preferred_time; prefix_info->valid_lt = valid_time; prefix_info->due_time = current_time + valid_time; if (prefix_info->due_time > rm->max_valid_due_time) rm->max_valid_due_time = prefix_info->due_time; /* * Tell the RA code to update any secondary per-interface * timers that it might be hoarding. */ ip6_ra_update_secondary_radv_info (prefix, prefix_length, prefix_info->opaque_data /* sw_if_index */ , valid_time, preferred_time); continue; } if (valid_time == 0) continue; pool_get (pm->prefix_pool, prefix_info); vec_add1 (pm->indices, prefix_info - pm->prefix_pool); prefix_info->prefix_group_index = client_state->prefix_group_index; set_is_dhcpv6_pd_prefix (prefix_info, 1); prefix_info->opaque_data = sw_if_index; prefix_info->prefix_length = prefix_length; prefix_info->prefix = *prefix; prefix_info->preferred_lt = preferred_time; prefix_info->valid_lt = valid_time; prefix_info->due_time = current_time + valid_time; if (prefix_info->due_time > rm->max_valid_due_time) rm->max_valid_due_time = prefix_info->due_time; rm->client_state_by_sw_if_index[sw_if_index].prefix_count++; u32 prefix_index = prefix_info - pm->prefix_pool; notify_prefix_add_del (prefix_index, 1); } client_state->server_index = server_index; client_state->T1 = ntohl (mp->T1); client_state->T2 = ntohl (mp->T2); if (client_state->T1 != 0) client_state->T1_due_time = current_time + client_state->T1; if (client_state->T2 != 0) client_state->T2_due_time = current_time + client_state->T2; client_state->rebinding = 0; interrupt_process (); return error; } static prefix_info_t * create_prefix_list (u32 sw_if_index) { ip6_prefix_main_t *pm = &ip6_prefix_main; prefix_info_t *prefix_info, *prefix_list = 0;; /* *INDENT-OFF* */ pool_foreach (prefix_info, pm->prefix_pool, ({ if (is_dhcpv6_pd_prefix (prefix_info) && prefix_info->opaque_data == sw_if_index) { u32 pos = vec_len (prefix_list); vec_validate (prefix_list, pos); clib_memcpy (&prefix_list[pos], prefix_info, sizeof (*prefix_info)); } })); /* *INDENT-ON* */ return prefix_list; } VNET_DHCP6_PD_REPLY_EVENT_FUNCTION (dhcp6_pd_reply_event_handler); static uword dhcp6_pd_client_cp_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f) { dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main; ip6_prefix_main_t *pm = &ip6_prefix_main; prefix_info_t *prefix_info; client_state_t *client_state; f64 sleep_time = 1e9; f64 current_time; f64 due_time; uword event_type; uword *event_data = 0; int i; while (1) { vlib_process_wait_for_event_or_clock (vm, sleep_time); event_type = vlib_process_get_events (vm, &event_data); vec_reset_length (event_data); if (event_type == DHCPV6_PD_EVENT_DISABLE) { vlib_node_set_state (vm, rm->node_index, VLIB_NODE_STATE_DISABLED); sleep_time = 1e9; continue; } current_time = vlib_time_now (vm); do { due_time = current_time + 1e9; /* *INDENT-OFF* */ pool_foreach (prefix_info, pm->prefix_pool, ({ if (is_dhcpv6_pd_prefix (prefix_info)) { if (prefix_info->due_time > current_time) { if (prefix_info->due_time < due_time) due_time = prefix_info->due_time; } else { u32 prefix_index = prefix_info - pm->prefix_pool; notify_prefix_add_del (prefix_index, 0); u32 sw_if_index = prefix_info->opaque_data; set_is_dhcpv6_pd_prefix (prefix_info, 0); pool_put (pm->prefix_pool, prefix_info); client_state = &rm->client_state_by_sw_if_index[sw_if_index]; if (--client_state->prefix_count == 0) { client_state->rebinding = 0; client_state->server_index = ~0; send_client_message_start_stop (sw_if_index, ~0, DHCPV6_MSG_SOLICIT, 0, 1); } } } })); /* *INDENT-ON* */ for (i = 0; i < vec_len (rm->client_state_by_sw_if_index); i++) { client_state_t *cs = &rm->client_state_by_sw_if_index[i]; if (cs->enabled && cs->server_index != ~0) { if (cs->T2_due_time > current_time) { if (cs->T2_due_time < due_time) due_time = cs->T2_due_time; if (cs->T1_due_time > current_time) { if (cs->T1_due_time < due_time) due_time = cs->T1_due_time; } else { cs->T1_due_time = DBL_MAX; prefix_info_t *prefix_list; prefix_list = create_prefix_list (i); send_client_message_start_stop (i, cs->server_index, DHCPV6_MSG_RENEW, prefix_list, 1); vec_free (prefix_list); } } else { cs->T2_due_time = DBL_MAX; prefix_info_t *prefix_list; prefix_list = create_prefix_list (i); cs->rebinding = 1; send_client_message_start_stop (i, ~0, DHCPV6_MSG_REBIND, prefix_list, 1); vec_free (prefix_list); } } } current_time = vlib_time_now (vm); } while (due_time < current_time); sleep_time = due_time - current_time; } return 0; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (dhcp6_pd_client_cp_process_node) = { .function = dhcp6_pd_client_cp_process, .type = VLIB_NODE_TYPE_PROCESS, .name = "dhcp6-pd-client-cp-process", }; /* *INDENT-ON* */ static void interrupt_process (void) { dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main; vlib_main_t *vm = rm->vlib_main; vlib_process_signal_event (vm, dhcp6_pd_client_cp_process_node.index, DHCPV6_PD_EVENT_INTERRUPT, 0); } static void disable_process (void) { dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main; vlib_main_t *vm = rm->vlib_main; vlib_process_signal_event (vm, dhcp6_pd_client_cp_process_node.index, DHCPV6_PD_EVENT_DISABLE, 0); } static void enable_process (void) { dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main; vlib_main_t *vm = rm->vlib_main; vlib_node_t *node; node = vec_elt (vm->node_main.nodes, rm->node_index); vlib_node_set_state (vm, rm->node_index, VLIB_NODE_STATE_POLLING); vlib_start_process (vm, node->runtime_index); } static u32 cp_ip6_construct_address (ip6_address_info_t * address_info, u32 prefix_index, ip6_address_t * r_addr) { ip6_prefix_main_t *pm = &ip6_prefix_main; prefix_info_t *prefix; u64 mask, addr0, pref; addr0 = clib_net_to_host_u64 (address_info->address.as_u64[0]); prefix = &pm->prefix_pool[prefix_index]; if (prefix->prefix_length > 64) { clib_warning ("Prefix length is bigger that 64 bits"); return 1; } mask = ((u64) 1 << (64 - prefix->prefix_length)) - 1; addr0 &= mask; pref = clib_host_to_net_u64 (prefix->prefix.as_u64[0]); pref &= ~mask; addr0 |= pref; r_addr->as_u64[0] = clib_host_to_net_u64 (addr0); r_addr->as_u64[1] = address_info->address.as_u64[1]; return 0; } static void cp_ip6_address_add_del_now (ip6_address_info_t * address_info, u8 is_add) { vlib_main_t *vm = vlib_get_main (); u32 prefix_index; ip6_address_t addr; clib_error_t *error; if (address_info->prefix_group_index != ~0) prefix_index = active_prefix_index_by_prefix_group_index_get (address_info->prefix_group_index); else prefix_index = ~0; if (is_add && !address_info->configured_in_data_plane) { if (prefix_index != ~0) { if (cp_ip6_construct_address (address_info, prefix_index, &addr) != 0) return; error = ip6_add_del_interface_address (vm, address_info->sw_if_index, &addr, address_info->prefix_length, 0 /* add */ ); if (error) clib_warning ("Failed adding IPv6 address: %U", format_clib_error, error); else { if (CLIB_DEBUG > 0) clib_warning ("Add address %U on %U", format_ip6_address_and_length, &addr, address_info->prefix_length, format_vnet_sw_if_index_name, vnet_get_main (), address_info->sw_if_index); address_info->configured_in_data_plane = 1; } } else { if (address_info->prefix_group_index == ~0) { error = ip6_add_del_interface_address (vm, address_info->sw_if_index, &address_info->address, address_info->prefix_length, 0 /* add */ ); if (error) clib_warning ("Failed adding IPv6 address: %U", format_clib_error, error); else { if (CLIB_DEBUG > 0) clib_warning ("Add address %U on %U", format_ip6_address_and_length, &addr, address_info->prefix_length, format_vnet_sw_if_index_name, vnet_get_main (), address_info->sw_if_index); address_info->configured_in_data_plane = 1; } } } } else if (!is_add && address_info->configured_in_data_plane) { if (prefix_index == ~0) { if (address_info->prefix_group_index == ~0) { error = ip6_add_del_interface_address (vm, address_info->sw_if_index, &address_info->address, address_info->prefix_length, 1 /* del */ ); if (error) clib_warning ("Failed deleting IPv6 address: %U", format_clib_error, error); address_info->configured_in_data_plane = 0; } else clib_warning ("Deleting address with prefix " "but active prefix index is not set"); } else { if (cp_ip6_construct_address (address_info, prefix_index, &addr) != 0) return; error = ip6_add_del_interface_address (vm, address_info->sw_if_index, &addr, address_info->prefix_length, 1 /* del */ ); if (error) clib_warning ("Failed deleting IPv6 address: %U", format_clib_error, error); address_info->configured_in_data_plane = 0; } } } static u32 cp_ip6_address_find_new_active_prefix (u32 prefix_group_index, u32 ignore_prefix_index) { ip6_prefix_main_t *pm = &ip6_prefix_main; prefix_info_t *prefix_info; /* *INDENT-OFF* */ pool_foreach (prefix_info, pm->prefix_pool, ({ if (prefix_info->prefix_group_index == prefix_group_index && prefix_info - pm->prefix_pool != ignore_prefix_index) return prefix_info - pm->prefix_pool; })); /* *INDENT-ON* */ return ~0; } static void cp_ip6_advertise_prefix (prefix_info_t * prefix_info, ip6_address_info_t * address_info, int enable) { vlib_main_t *vm = vlib_get_main (); ip6_main_t *im = &ip6_main; u32 prefix_index; ip6_address_t addr; int rv; prefix_index = active_prefix_index_by_prefix_group_index_get (address_info->prefix_group_index); if (cp_ip6_construct_address (address_info, prefix_index, &addr) != 0) { clib_warning ("address construction FAIL"); return; } /* The RA code assumes that host bits are zero, so clear them */ addr.as_u64[0] &= im->fib_masks[address_info->prefix_length].as_u64[0]; addr.as_u64[1] &= im->fib_masks[address_info->prefix_length].as_u64[1]; rv = ip6_ra_prefix (vm, address_info->sw_if_index, &addr, address_info->prefix_length, 0 /* use_default */ , prefix_info->valid_lt, prefix_info->preferred_lt, 0 /* no_advertise */ , 0 /* off_link */ , 0 /* no_autoconfig */ , 0 /* no_onlink */ , enable == 0 /* is_no */ ); if (rv != 0) { clib_warning ("ip6_neighbor_ra_prefix returned %d", rv); return; } if (CLIB_DEBUG > 0) clib_warning ("Advertise prefix %U valid lt %u preferred lt %u", format_ip6_address_and_length, &addr, address_info->prefix_length, prefix_info->valid_lt, prefix_info->preferred_lt); } static void cp_ip6_address_prefix_add_del_handler (u32 prefix_index, u8 is_add) { ip6_address_with_prefix_main_t *apm = &ip6_address_with_prefix_main; ip6_prefix_main_t *pm = &ip6_prefix_main; ip6_address_info_t *address_info; prefix_info_t *prefix; u32 new_prefix_index; u32 prefix_group_index; u32 i; prefix = &pm->prefix_pool[prefix_index]; prefix_group_index = prefix->prefix_group_index; if (is_add) { if (active_prefix_index_by_prefix_group_index_get (prefix_group_index) == ~0) { active_prefix_index_by_prefix_group_index_set (prefix_group_index, prefix_index); for (i = 0; i < vec_len (apm->addresses); i++) { address_info = &apm->addresses[i]; if (address_info->prefix_group_index == prefix_group_index) { /* Add the prefix to the interface */ cp_ip6_address_add_del_now (address_info, 1 /* add */ ); /* And advertise the prefix on the interface */ cp_ip6_advertise_prefix (prefix, address_info, 1 /* enable */ ); } } } } else { if (active_prefix_index_by_prefix_group_index_get (prefix_group_index) == prefix_index) { for (i = 0; i < vec_len (apm->addresses); i++) { address_info = &apm->addresses[i]; if (address_info->prefix_group_index == prefix_group_index) { cp_ip6_advertise_prefix (prefix, address_info, 0 /* enable */ ); cp_ip6_address_add_del_now (address_info, 0 /* del */ ); } } active_prefix_index_by_prefix_group_index_set (prefix_group_index, ~0); new_prefix_index = cp_ip6_address_find_new_active_prefix (prefix_group_index, prefix_index); if (new_prefix_index != ~0) { active_prefix_index_by_prefix_group_index_set (prefix_group_index, new_prefix_index); for (i = 0; i < vec_len (apm->addresses); i++) { address_info = &apm->addresses[i]; if (address_info->prefix_group_index == prefix_group_index) { cp_ip6_address_add_del_now (address_info, 1 /* add */ ); cp_ip6_advertise_prefix (prefix, address_info, 1 /* enable */ ); } } } } } } static u32 prefix_group_find_or_create (const u8 * name, u8 create) { ip6_prefix_main_t *pm = &ip6_prefix_main; u32 free_index = ~0; u8 *name_dup; u32 i; for (i = 0; i < vec_len (pm->prefix_group_name_by_index); i++) { if (pm->prefix_group_name_by_index[i] == 0) free_index = i; else if (0 == strcmp ((const char *) pm->prefix_group_name_by_index[i], (const char *) name)) return i; } if (!create) return ~0; name_dup = (u8 *) strdup ((const char *) name); if (free_index != ~0) { pm->prefix_group_name_by_index[free_index] = name_dup; return free_index; } else { vec_add1 (pm->prefix_group_name_by_index, name_dup); return vec_len (pm->prefix_group_name_by_index) - 1; } } int dhcp6_cp_ip6_address_add_del (u32 sw_if_index, const u8 * prefix_group, ip6_address_t address, u8 prefix_length, u8 is_add) { ip6_address_with_prefix_main_t *apm = &ip6_address_with_prefix_main; vnet_main_t *vnm = vnet_get_main (); ip6_address_info_t *address_info; u32 prefix_group_index; u32 n; if (!vnet_sw_interface_is_api_valid (vnm, sw_if_index)) { clib_warning ("Invalid sw_if_index"); return VNET_API_ERROR_INVALID_VALUE; } if (prefix_group != 0 && prefix_group[0] != '\0') { if (strnlen ((const char *) prefix_group, 64) == 64) return VNET_API_ERROR_INVALID_VALUE; prefix_group_index = prefix_group_find_or_create (prefix_group, 1); } else prefix_group_index = ~0; n = vec_len (apm->addresses); vec_foreach (address_info, apm->addresses) { if (address_info->sw_if_index == sw_if_index && address_info->prefix_group_index == prefix_group_index && address_info->prefix_length == prefix_length && 0 == memcmp (&address_info->address, &address, 16)) { if (is_add) return VNET_API_ERROR_DUPLICATE_IF_ADDRESS; cp_ip6_address_add_del_now (address_info, 0 /* del */ ); *address_info = apm->addresses[n - 1]; _vec_len (apm->addresses) = n - 1; return 0; } } if (!is_add) return VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE; vec_validate (apm->addresses, n); address_info = &apm->addresses[n]; address_info->sw_if_index = sw_if_index; address_info->prefix_group_index = prefix_group_index; address_info->address = address; address_info->prefix_length = prefix_length; cp_ip6_address_add_del_now (address_info, 1 /* add */ ); return 0; } static clib_error_t * cp_ip6_address_add_del_command_function (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { vnet_main_t *vnm = vnet_get_main (); clib_error_t *error = 0; u32 sw_if_index = ~0; u8 *prefix_group = 0; ip6_address_t address; u32 prefix_length; u8 address_set = 0; u8 add = 1; unformat_input_t _line_input, *line_input = &_line_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, "prefix group %s", &prefix_group)); else if (unformat (line_input, "%U/%d", unformat_ip6_address, &address, &prefix_length)) address_set = 1; else if (unformat (line_input, "del")) add = 0; else { error = clib_error_return (0, "unexpected input `%U'", format_unformat_error, line_input); unformat_free (line_input); goto done; } } unformat_free (line_input); if (sw_if_index == ~0) error = clib_error_return (0, "Missing sw_if_index"); else if (address_set == 0) error = clib_error_return (0, "Missing address"); else { if (dhcp6_cp_ip6_address_add_del (sw_if_index, prefix_group, address, prefix_length, add) != 0) error = clib_error_return (0, "Error adding or removing address"); } done: return error; } /*? * This command is used to add/delete IPv6 address * potentially using available prefix from specified prefix group * * @cliexpar * @parblock * Example of how to add IPv6 address: * @cliexcmd{set ip6 address GigabitEthernet2/0/0 * prefix group my-prefix-group ::7/64} * Example of how to delete IPv6 address: * @cliexcmd{set ip6 address GigabitEthernet2/0/0 * prefix group my-prefix-group ::7/64 del} * @endparblock ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (ip6_address_add_del_command, static) = { .path = "set ip6 address", .short_help = "set ip6 address <interface> [prefix group <string>] " "<address> [del]", .function = cp_ip6_address_add_del_command_function, }; /* *INDENT-ON* */ static clib_error_t * cp_ip6_addresses_show_command_function (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { ip6_address_with_prefix_main_t *apm = &ip6_address_with_prefix_main; ip6_prefix_main_t *pm = &ip6_prefix_main; ip6_address_info_t *address_info; const u8 *prefix_group; clib_error_t *error = 0; int i; for (i = 0; i < vec_len (apm->addresses); i++) { address_info = &apm->addresses[i]; if (address_info->prefix_group_index == ~0) prefix_group = (const u8 *) "NONE"; else prefix_group = pm->prefix_group_name_by_index[address_info->prefix_group_index]; vlib_cli_output (vm, "sw_if_index: %u, prefix_group: %s, address: %U/%d", address_info->sw_if_index, prefix_group, format_ip6_address, &address_info->address, address_info->prefix_length); } return error; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (ip6_addresses_show_command, static) = { .path = "show ip6 addresses", .short_help = "show ip6 addresses", .function = cp_ip6_addresses_show_command_function, }; /* *INDENT-ON* */ static clib_error_t * cp_ip6_prefixes_show_command_function (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { ip6_prefix_main_t *pm = &ip6_prefix_main; clib_error_t *error = 0; prefix_info_t *prefix_info; const u8 *prefix_group; f64 current_time = vlib_time_now (vm); /* *INDENT-OFF* */ pool_foreach (prefix_info, pm->prefix_pool, ({ prefix_group = pm->prefix_group_name_by_index[prefix_info->prefix_group_index]; vlib_cli_output (vm, "opaque_data: %lu, prefix: %U/%d, prefix group: %s, " "preferred lifetime: %u, valid lifetime: %u " "(%f remaining)", prefix_info->opaque_data, format_ip6_address, &prefix_info->prefix, prefix_info->prefix_length, prefix_group, prefix_info->preferred_lt, prefix_info->valid_lt, prefix_info->due_time - current_time); })); /* *INDENT-ON* */ return error; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (ip6_prefixes_show_command, static) = { .path = "show ip6 prefixes", .short_help = "show ip6 prefixes", .function = cp_ip6_prefixes_show_command_function, }; /* *INDENT-ON* */ static clib_error_t * ip6_pd_clients_show_command_function (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main; ip6_prefix_main_t *pm = &ip6_prefix_main; clib_error_t *error = 0; client_state_t *cs; f64 current_time = vlib_time_now (vm); const u8 *prefix_group; u8 *buf1 = 0; u8 *buf2 = 0; const char *rebinding; u32 i; for (i = 0; i < vec_len (rm->client_state_by_sw_if_index); i++) { cs = &rm->client_state_by_sw_if_index[i]; if (cs->enabled) { vec_reset_length (buf1); vec_reset_length (buf2); if (cs->T1_due_time != DBL_MAX && cs->T1_due_time > current_time) { buf1 = format (buf1, "%u remaining", (u32) round (cs->T1_due_time - current_time)); } else buf1 = format (buf1, "timeout"); if (cs->T2_due_time != DBL_MAX && cs->T2_due_time > current_time) buf2 = format (buf2, "%u remaining", (u32) round (cs->T2_due_time - current_time)); else buf2 = format (buf2, "timeout"); if (cs->rebinding) rebinding = ", REBINDING"; else rebinding = ""; prefix_group = pm->prefix_group_name_by_index[cs->prefix_group_index]; if (cs->T1) vlib_cli_output (vm, "sw_if_index: %u, prefix group: %s, T1: %u (%v), " "T2: %u (%v), server index: %d%s", i, prefix_group, cs->T1, buf1, cs->T2, buf2, cs->server_index, rebinding); else vlib_cli_output (vm, "sw_if_index: %u, prefix group: %s%s", i, prefix_group, rebinding); } } vec_free (buf1); vec_free (buf2); return error; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (ip6_pd_clients_show_command, static) = { .path = "show ip6 pd clients", .short_help = "show ip6 pd clients", .function = ip6_pd_clients_show_command_function, }; /* *INDENT-ON* */ int dhcp6_pd_client_enable_disable (u32 sw_if_index, const u8 * prefix_group, u8 enable) { dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main; ip6_prefix_main_t *pm = &ip6_prefix_main; vnet_main_t *vnm = rm->vnet_main; client_state_t *client_state; static client_state_t empty_config = { 0 }; prefix_info_t *prefix_info; prefix_info_t *prefix_list = 0; u32 prefix_group_index; if (!vnet_sw_interface_is_api_valid (vnm, sw_if_index)) { clib_warning ("Invalid sw_if_index"); return VNET_API_ERROR_INVALID_VALUE; } vec_validate_init_empty (rm->client_state_by_sw_if_index, sw_if_index, empty_config); client_state = &rm->client_state_by_sw_if_index[sw_if_index]; u8 old_enabled = client_state->enabled; if (enable) { if (strnlen ((const char *) prefix_group, 64) == 64 || prefix_group[0] == '\0') return VNET_API_ERROR_INVALID_VALUE; prefix_group_index = prefix_group_find_or_create (prefix_group, !old_enabled); if (old_enabled && prefix_group_index != client_state->prefix_group_index) return VNET_API_ERROR_INVALID_VALUE; } if (!old_enabled && enable) { client_state->enabled = 1; client_state->prefix_group_index = prefix_group_index; ASSERT (client_state->prefix_group_index != ~0); client_state->server_index = ~0; rm->n_clients++; if (rm->n_clients == 1) { enable_process (); dhcp6_clients_enable_disable (1); } ip6_link_enable (sw_if_index, NULL); send_client_message_start_stop (sw_if_index, ~0, DHCPV6_MSG_SOLICIT, 0, 1); } else if (old_enabled && !enable) { send_client_message_start_stop (sw_if_index, ~0, ~0, 0, 0); rm->n_clients--; if (rm->n_clients == 0) { dhcp6_clients_enable_disable (0); disable_process (); } vec_validate (prefix_list, 0); /* *INDENT-OFF* */ pool_foreach (prefix_info, pm->prefix_pool, ({ if (is_dhcpv6_pd_prefix (prefix_info) && prefix_info->opaque_data == sw_if_index) { ASSERT (sw_if_index < vec_len (rm->client_state_by_sw_if_index) && rm->client_state_by_sw_if_index[sw_if_index].enabled); client_state_t *client_state = &rm->client_state_by_sw_if_index[sw_if_index]; prefix_list[0] = *prefix_info; send_client_message_start_stop (sw_if_index, client_state->server_index, DHCPV6_MSG_RELEASE, prefix_list, 1); u32 prefix_index = prefix_info - pm->prefix_pool; notify_prefix_add_del (prefix_index, 0); set_is_dhcpv6_pd_prefix (prefix_info, 0); pool_put (pm->prefix_pool, prefix_info); } })); /* *INDENT-ON* */ vec_free (prefix_list); clib_memset (client_state, 0, sizeof (*client_state)); } return 0; } static clib_error_t * dhcp6_pd_client_enable_disable_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main; vnet_main_t *vnm = rm->vnet_main; clib_error_t *error = 0; u8 *prefix_group = 0; u32 sw_if_index = ~0; u8 enable = 1; unformat_input_t _line_input, *line_input = &_line_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, "prefix group %s", &prefix_group)); else if (unformat (line_input, "disable")) enable = 0; else { error = clib_error_return (0, "unexpected input `%U'", format_unformat_error, line_input); goto done; } } if (prefix_group == 0 && enable) error = clib_error_return (0, "Prefix group must be set when enabling"); else if (sw_if_index != ~0) { if (dhcp6_pd_client_enable_disable (sw_if_index, prefix_group, enable) != 0) error = clib_error_return (0, "Invalid sw_if_index or prefix group"); } else error = clib_error_return (0, "Missing sw_if_index"); done: vec_free (prefix_group); unformat_free (line_input); return error; } /*? * This command is used to enable/disable DHCPv6 PD client * on particular interface. * * @cliexpar * @parblock * Example of how to enable DHCPv6 PD client: * @cliexcmd{dhcp6 pd client GigabitEthernet2/0/0 prefix group my-pd-group} * Example of how to disable DHCPv6 PD client: * @cliexcmd{dhcp6 pd client GigabitEthernet2/0/0 disable} * @endparblock ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (dhcp6_pd_client_enable_disable_command, static) = { .path = "dhcp6 pd client", .short_help = "dhcp6 pd client <interface> (prefix group <string> | disable)", .function = dhcp6_pd_client_enable_disable_command_fn, }; /* *INDENT-ON* */ #include <vlib/unix/plugin.h> static clib_error_t * dhcp_pd_client_cp_init (vlib_main_t * vm) { dhcp6_pd_client_cp_main_t *rm = &dhcp6_pd_client_cp_main; rm->vlib_main = vm; rm->vnet_main = vnet_get_main (); rm->api_main = vlibapi_get_main (); rm->node_index = dhcp6_pd_client_cp_process_node.index; return (NULL); } VLIB_INIT_FUNCTION (dhcp_pd_client_cp_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */