Trending: Fix graph file name - csit

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author	Tibor Frank <tifrank@cisco.com>	2020-09-23 13:55:39 +0200
committer	Tibor Frank <tifrank@cisco.com>	2020-09-23 13:55:39 +0200
commit	49a7f2b2830d7684f19508afc53f04288aae241e (patch)
tree	1fdf971900c14903542912e5bd23262a85dcc7da /docs/cpta
parent	a0362eb00573cda326b7067f020359d5913e76fd (diff)

Trending: Fix graph file name

2n-clx-xxv710-64b-8t4c-ip4-features-snat44det-avf.html Change-Id: I93b39f9edf3b0d85b08cec97ad647e398da83207 Signed-off-by: Tibor Frank <tifrank@cisco.com>

Diffstat (limited to 'docs/cpta')

-rw-r--r--

1 files changed, 3 insertions, 3 deletions

/* * 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 <vnet/vnet_msg_enum.h> #include <dhcp/dhcp6_packet.h> #include <dhcp/dhcp6_ia_na_client_dp.h> #include <vnet/ip/ip.h> #include <vnet/ip/ip6.h> #include <vnet/ip/ip6_link.h> #include <float.h> #include <math.h> typedef struct { u32 sw_if_index; ip6_address_t address; u32 preferred_lt; u32 valid_lt; f64 due_time; } address_info_t; typedef struct { u8 enabled; u32 server_index; u32 T1; u32 T2; f64 T1_due_time; f64 T2_due_time; u32 address_count; u8 rebinding; } client_state_t; typedef struct { address_info_t *address_pool; client_state_t *client_state_by_sw_if_index; 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_client_cp_main_t; static dhcp6_client_cp_main_t dhcp6_client_cp_main; enum { RD_CP_EVENT_INTERRUPT, RD_CP_EVENT_DISABLE, }; static void send_client_message_start_stop (u32 sw_if_index, u32 server_index, u8 msg_type, address_info_t * address_list, u8 start) { dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main; dhcp6_send_client_message_params_t params = { 0, }; dhcp6_send_client_message_params_address_t *addresses = 0, *addr; 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 (address_list) != 0) vec_validate (addresses, vec_len (address_list) - 1); for (i = 0; i < vec_len (address_list); i++) { address_info_t *address = &address_list[i]; addr = &addresses[i]; addr->valid_lt = address->valid_lt; addr->preferred_lt = address->preferred_lt; addr->address = address->address; } params.addresses = addresses; dhcp6_send_client_message (rm->vlib_main, sw_if_index, !start, &params); vec_free (params.addresses); } static void interrupt_process (void); static u8 ip6_addresses_equal (ip6_address_t * address1, ip6_address_t * address2) { if (address1->as_u64[0] != address2->as_u64[0]) return 0; return address1->as_u64[1] == address2->as_u64[1]; } static clib_error_t * dhcp6_reply_event_handler (vl_api_dhcp6_reply_event_t * mp) { dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main; vlib_main_t *vm = rm->vlib_main; client_state_t *client_state; ip6_address_t *address; u32 sw_if_index; u32 n_addresses; vl_api_dhcp6_address_info_t *api_address; u32 inner_status_code; u32 status_code; u32 server_index; f64 current_time; clib_error_t *error = 0; u32 i; 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_addresses = ntohl (mp->n_addresses); 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) { address_info_t *address_list = 0, *address_info; if (inner_status_code == DHCPV6_STATUS_NOADDRS_AVAIL) { clib_warning ("Advertise message arrived with NoAddrsAvail status code"); return 0; } if (n_addresses > 0) vec_validate (address_list, n_addresses - 1); for (i = 0; i < n_addresses; i++) { api_address = &mp->addresses[i]; address = (ip6_address_t *) api_address->address; address_info = &address_list[i]; address_info->address = *address; address_info->preferred_lt = 0; address_info->valid_lt = 0; } client_state->server_index = server_index; send_client_message_start_stop (sw_if_index, server_index, DHCPV6_MSG_REQUEST, address_list, 1); vec_free (address_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_NOADDRS_AVAIL) { clib_warning ("Reply message arrived with NoAddrsAvail status code"); if (n_addresses > 0) { clib_warning ("Invalid Reply message arrived: It contains NoAddrsAvail " "status code but also contains addresses"); 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); for (i = 0; i < n_addresses; i++) { address_info_t *address_info = 0; u32 valid_time; u32 preferred_time; api_address = &mp->addresses[i]; address = (ip6_address_t *) api_address->address; if (ip6_address_is_link_local_unicast (address)) continue; valid_time = ntohl (api_address->valid_time); preferred_time = ntohl (api_address->preferred_time); if (preferred_time > valid_time) continue; u8 address_already_present = 0; /* *INDENT-OFF* */ pool_foreach (address_info, rm->address_pool, ({ if (address_info->sw_if_index != sw_if_index) ; else if (!ip6_addresses_equal (&address_info->address, address)) ; else { address_already_present = 1; goto address_pool_foreach_out; } })); /* *INDENT-ON* */ address_pool_foreach_out: if (address_already_present) { address_info->preferred_lt = preferred_time; address_info->valid_lt = valid_time; address_info->due_time = current_time; /* Renew the lease at the preferred time, if non-zero */ address_info->due_time += (preferred_time > 0) ? preferred_time : valid_time; if (address_info->due_time > rm->max_valid_due_time) rm->max_valid_due_time = address_info->due_time; continue; } if (valid_time == 0) continue; pool_get (rm->address_pool, address_info); address_info->sw_if_index = sw_if_index; address_info->address = *address; address_info->preferred_lt = preferred_time; address_info->valid_lt = valid_time; address_info->due_time = current_time; /* Renew the lease at the preferred time, if non-zero */ address_info->due_time += (preferred_time > 0) ? preferred_time : valid_time; if (address_info->due_time > rm->max_valid_due_time) rm->max_valid_due_time = address_info->due_time; rm->client_state_by_sw_if_index[sw_if_index].address_count++; error = ip6_add_del_interface_address (vm, sw_if_index, &address_info->address, 64, 0); if (error) clib_warning ("Failed to add interface address"); } 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 address_info_t * create_address_list (u32 sw_if_index) { dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main; address_info_t *address_info, *address_list = 0;; /* *INDENT-OFF* */ pool_foreach (address_info, rm->address_pool, ({ if (address_info->sw_if_index == sw_if_index) { u32 pos = vec_len (address_list); vec_validate (address_list, pos); clib_memcpy (&address_list[pos], address_info, sizeof (*address_info)); } })); /* *INDENT-ON* */ return address_list; } VNET_DHCP6_REPLY_EVENT_FUNCTION (dhcp6_reply_event_handler); static uword dhcp6_client_cp_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f) { dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main; address_info_t *address_info; client_state_t *client_state; f64 sleep_time = 1e9; clib_error_t *error; 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 == RD_CP_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 (address_info, rm->address_pool, ({ if (address_info->due_time > current_time) { if (address_info->due_time < due_time) due_time = address_info->due_time; } else { u32 sw_if_index = address_info->sw_if_index; error = ip6_add_del_interface_address (vm, sw_if_index, &address_info->address, 64, 1); if (error) clib_warning ("Failed to delete interface address"); pool_put (rm->address_pool, address_info); /* make sure ip6 stays enabled */ ip6_link_enable (sw_if_index, NULL); client_state = &rm->client_state_by_sw_if_index[sw_if_index]; if (--client_state->address_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; address_info_t *address_list; address_list = create_address_list (i); cs->rebinding = 1; send_client_message_start_stop (i, cs->server_index, DHCPV6_MSG_RENEW, address_list, 1); vec_free (address_list); } } else { cs->T2_due_time = DBL_MAX; address_info_t *address_list; address_list = create_address_list (i); cs->rebinding = 1; send_client_message_start_stop (i, ~0, DHCPV6_MSG_REBIND, address_list, 1); vec_free (address_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_client_cp_process_node) = { .function = dhcp6_client_cp_process, .type = VLIB_NODE_TYPE_PROCESS, .name = "dhcp6-client-cp-process", }; /* *INDENT-ON* */ static void interrupt_process (void) { dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main; vlib_main_t *vm = rm->vlib_main; vlib_process_signal_event (vm, dhcp6_client_cp_process_node.index, RD_CP_EVENT_INTERRUPT, 0); } static void disable_process (void) { dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main; vlib_main_t *vm = rm->vlib_main; vlib_process_signal_event (vm, dhcp6_client_cp_process_node.index, RD_CP_EVENT_DISABLE, 0); } static void enable_process (void) { dhcp6_client_cp_main_t *rm = &dhcp6_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 clib_error_t * dhcp6_addresses_show_command_function (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { dhcp6_client_cp_main_t *dm = &dhcp6_client_cp_main; clib_error_t *error = 0; address_info_t *address_info; f64 current_time = vlib_time_now (vm); /* *INDENT-OFF* */ pool_foreach (address_info, dm->address_pool, ({ vlib_cli_output (vm, "address: %U, " "preferred lifetime: %u, valid lifetime: %u " "(%f remaining)", format_ip6_address, &address_info->address, address_info->preferred_lt, address_info->valid_lt, address_info->due_time - current_time); })); /* *INDENT-ON* */ return error; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (dhcp6_addresses_show_command, static) = { .path = "show dhcp6 addresses", .short_help = "show dhcp6 addresses", .function = dhcp6_addresses_show_command_function, }; /* *INDENT-ON* */ static clib_error_t * dhcp6_clients_show_command_function (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main; clib_error_t *error = 0; client_state_t *cs; f64 current_time = vlib_time_now (vm); 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 = ""; if (cs->T1) vlib_cli_output (vm, "sw_if_index: %u, T1: %u (%v), " "T2: %u (%v), server index: %d%s", i, cs->T1, buf1, cs->T2, buf2, cs->server_index, rebinding); else vlib_cli_output (vm, "sw_if_index: %u%s", i, rebinding); } } vec_free (buf1); vec_free (buf2); return error; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (dhcp6_clients_show_command, static) = { .path = "show dhcp6 clients", .short_help = "show dhcp6 clients", .function = dhcp6_clients_show_command_function, }; /* *INDENT-ON* */ int dhcp6_client_enable_disable (u32 sw_if_index, u8 enable) { dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main; vnet_main_t *vnm = rm->vnet_main; vlib_main_t *vm = rm->vlib_main; client_state_t *client_state; client_state_t empty_config = { 0 }; address_info_t *address_info; clib_error_t *error; if (!vnet_sw_interface_is_api_valid (vnm, sw_if_index)) { clib_warning ("Invalid sw_if_index"); return 1; } 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) client_state->enabled = 1; client_state->server_index = ~0; if (!old_enabled && enable) { 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 (); } /* *INDENT-OFF* */ pool_foreach (address_info, rm->address_pool, ({ if (address_info->sw_if_index == 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]; send_client_message_start_stop (sw_if_index, client_state->server_index, DHCPV6_MSG_RELEASE, address_info, 1); error = ip6_add_del_interface_address (vm, sw_if_index, &address_info->address, 64, 1); if (error) clib_warning ("Failed to delete interface address"); pool_put (rm->address_pool, address_info); } })); /* *INDENT-ON* */ } if (!enable) client_state->enabled = 0; return 0; } static clib_error_t * dhcp6_client_enable_disable_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main; vnet_main_t *vnm = rm->vnet_main; clib_error_t *error = 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, "disable")) enable = 0; else { error = clib_error_return (0, "unexpected input `%U'", format_unformat_error, line_input); goto done; } } unformat_free (line_input); if (sw_if_index != ~0) { if (dhcp6_client_enable_disable (sw_if_index, enable) != 0) error = clib_error_return (0, "Invalid sw_if_index"); } else error = clib_error_return (0, "Missing sw_if_index"); done: return error; } /*? * This command is used to enable/disable DHCPv6 client * on particular interface. * * @cliexpar * @parblock * Example of how to enable DHCPv6 client: * @cliexcmd{dhcp6 client GigabitEthernet2/0/0} * Example of how to disable DHCPv6 client: * @cliexcmd{dhcp6 client GigabitEthernet2/0/0 disable} * @endparblock ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (dhcp6_client_enable_disable_command, static) = { .path = "dhcp6 client", .short_help = "dhcp6 client <interface> [disable]", .function = dhcp6_client_enable_disable_command_fn, }; /* *INDENT-ON* */ static clib_error_t * dhcp_ia_na_client_cp_init (vlib_main_t * vm) { dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main; rm->vlib_main = vm; rm->vnet_main = vnet_get_main (); rm->api_main = vlibapi_get_main (); rm->node_index = dhcp6_client_cp_process_node.index; return NULL; } VLIB_INIT_FUNCTION (dhcp_ia_na_client_cp_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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