+++ /dev/null
-/*
- * 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 "sixrd.h"
-#include <vnet/plugin/plugin.h>
-
-#include <vnet/fib/fib_table.h>
-#include <vnet/fib/ip6_fib.h>
-#include <vnet/adj/adj.h>
-
-/*
- * This code supports the following sixrd modes:
- *
- * 32 EA bits (Complete IPv4 address is embedded):
- * ea_bits_len = 32
- * IPv4 suffix is embedded:
- * ea_bits_len = < 32
- * No embedded address bits (1:1 mode):
- * ea_bits_len = 0
- */
-
-int
-sixrd_create_domain (ip6_address_t *ip6_prefix,
- u8 ip6_prefix_len,
- ip4_address_t *ip4_prefix,
- u8 ip4_prefix_len,
- ip4_address_t *ip4_src,
- u32 *sixrd_domain_index,
- u16 mtu)
-{
- dpo_id_t dpo_v6 = DPO_INVALID, dpo_v4 = DPO_INVALID;
- sixrd_main_t *mm = &sixrd_main;
- fib_node_index_t fei;
- sixrd_domain_t *d;
-
- /* Get domain index */
- pool_get_aligned(mm->domains, d, CLIB_CACHE_LINE_BYTES);
- memset(d, 0, sizeof (*d));
- *sixrd_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->ip4_src = *ip4_src;
- d->mtu = mtu;
-
- if (ip4_prefix_len < 32)
- d->shift = 64 - ip6_prefix_len + (32 - ip4_prefix_len);
-
- /* Create IPv6 route/adjacency */
- fib_prefix_t pfx6 = {
- .fp_proto = FIB_PROTOCOL_IP6,
- .fp_len = d->ip6_prefix_len,
- .fp_addr = {
- .ip6 = d->ip6_prefix,
- },
- };
- sixrd_dpo_create(DPO_PROTO_IP6,
- *sixrd_domain_index,
- &dpo_v6);
- fib_table_entry_special_dpo_add(0, &pfx6,
- FIB_SOURCE_SIXRD,
- FIB_ENTRY_FLAG_EXCLUSIVE,
- &dpo_v6);
- dpo_reset (&dpo_v6);
-
- /*
- * Multiple SIXRD domains may share same source IPv4 TEP
- * In this case the route will exist and be SixRD sourced.
- * Find the adj (if any) already contributed and modify it
- */
- fib_prefix_t pfx4 = {
- .fp_proto = FIB_PROTOCOL_IP4,
- .fp_len = 32,
- .fp_addr = {
- .ip4 = d->ip4_src,
- },
- };
- fei = fib_table_lookup_exact_match(0, &pfx4);
-
- if (FIB_NODE_INDEX_INVALID != fei)
- {
- dpo_id_t dpo = DPO_INVALID;
-
- if (fib_entry_get_dpo_for_source (fei, FIB_SOURCE_SIXRD, &dpo))
- {
- /*
- * modify the existing adj to indicate it's shared
- * skip to route add.
- * It is locked to pair with the unlock below.
- */
- const dpo_id_t *sd_dpo;
- sixrd_dpo_t *sd;
-
- ASSERT(DPO_LOAD_BALANCE == dpo.dpoi_type);
-
- sd_dpo = load_balance_get_bucket(dpo.dpoi_index, 0);
- sd = sixrd_dpo_get (sd_dpo->dpoi_index);
-
- sd->sd_domain = ~0;
- dpo_copy (&dpo_v4, sd_dpo);
- dpo_reset (&dpo);
-
- goto route_add;
- }
- }
- /* first time addition of the route */
- sixrd_dpo_create(DPO_PROTO_IP4,
- *sixrd_domain_index,
- &dpo_v4);
-
-route_add:
- /*
- * Create ip4 route. This is a reference counted add. If the prefix
- * already exists and is SixRD sourced, it is now SixRD source n+1 times
- * and will need to be removed n+1 times.
- */
- fib_table_entry_special_dpo_add(0, &pfx4,
- FIB_SOURCE_SIXRD,
- FIB_ENTRY_FLAG_EXCLUSIVE,
- &dpo_v4);
- dpo_reset (&dpo_v4);
-
- return 0;
-}
-
-/*
- * sixrd_delete_domain
- */
-int
-sixrd_delete_domain (u32 sixrd_domain_index)
-{
- sixrd_main_t *mm = &sixrd_main;
- sixrd_domain_t *d;
-
- if (pool_is_free_index(mm->domains, sixrd_domain_index)) {
- clib_warning("SIXRD domain delete: domain does not exist: %d",
- sixrd_domain_index);
- return -1;
- }
-
- d = pool_elt_at_index(mm->domains, sixrd_domain_index);
-
- fib_prefix_t pfx = {
- .fp_proto = FIB_PROTOCOL_IP4,
- .fp_len = 32,
- .fp_addr = {
- .ip4 = d->ip4_src,
- },
- };
- fib_table_entry_special_remove(0, &pfx, FIB_SOURCE_SIXRD);
-
- fib_prefix_t pfx6 = {
- .fp_proto = FIB_PROTOCOL_IP6,
- .fp_len = d->ip6_prefix_len,
- .fp_addr = {
- .ip6 = d->ip6_prefix,
- },
- };
- fib_table_entry_special_remove(0, &pfx6, FIB_SOURCE_SIXRD);
-
- pool_put(mm->domains, d);
-
- return 0;
-}
-
-static clib_error_t *
-sixrd_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;
- ip4_address_t ip4_src;
- u32 ip6_prefix_len=0, ip4_prefix_len=0, sixrd_domain_index;
- u32 num_m_args = 0;
- /* Optional arguments */
- u32 mtu = 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, "ip6-pfx %U/%d", unformat_ip6_address, &ip6_prefix, &ip6_prefix_len))
- num_m_args++;
- else if (unformat(line_input, "ip4-pfx %U/%d", unformat_ip4_address, &ip4_prefix, &ip4_prefix_len))
- num_m_args++;
- else if (unformat(line_input, "ip4-src %U", unformat_ip4_address, &ip4_src))
- num_m_args++;
- else if (unformat(line_input, "mtu %d", &mtu))
- num_m_args++;
- else
- return clib_error_return(0, "unknown input `%U'",
- format_unformat_error, input);
- }
- unformat_free(line_input);
-
- if (num_m_args < 3)
- return clib_error_return(0, "mandatory argument(s) missing");
-
- sixrd_create_domain(&ip6_prefix, ip6_prefix_len, &ip4_prefix, ip4_prefix_len,
- &ip4_src, &sixrd_domain_index, mtu);
-
- return 0;
-}
-
-static clib_error_t *
-sixrd_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 sixrd_domain_index;
-
- /* 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", &sixrd_domain_index))
- num_m_args++;
- else
- return clib_error_return(0, "unknown input `%U'",
- format_unformat_error, input);
- }
- unformat_free(line_input);
-
- if (num_m_args != 1)
- return clib_error_return(0, "mandatory argument(s) missing");
-
- sixrd_delete_domain(sixrd_domain_index);
-
- return 0;
-}
-
-static u8 *
-format_sixrd_domain (u8 *s, va_list *args)
-{
- sixrd_domain_t *d = va_arg(*args, sixrd_domain_t *);
- sixrd_main_t *mm = &sixrd_main;
-
- s = format(s,
- "[%d] ip6-pfx %U/%d ip4-pfx %U/%d ip4-src %U mtu %d",
- d - mm->domains,
- format_ip6_address, &d->ip6_prefix, d->ip6_prefix_len,
- format_ip4_address, &d->ip4_prefix, d->ip4_prefix_len,
- format_ip4_address, &d->ip4_src, d->mtu);
-
- return s;
-}
-
-static clib_error_t *
-show_sixrd_domain_command_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
-{
- sixrd_main_t *mm = &sixrd_main;
- sixrd_domain_t *d;
-
- if (pool_elts(mm->domains) == 0)
- vlib_cli_output(vm, "No SIXRD domains are configured...");
-
- pool_foreach(d, mm->domains, ({vlib_cli_output(vm, "%U", format_sixrd_domain, d);}));
-
- return 0;
-
-}
-
-static clib_error_t *
-show_sixrd_stats_command_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
-{
- sixrd_main_t *mm = &sixrd_main;
- sixrd_domain_t *d;
- int domains = 0, domaincount = 0;
- if (pool_elts (mm->domains) == 0)
- vlib_cli_output (vm, "No SIXRD domains are configured...");
-
- pool_foreach(d, mm->domains, ({
- domains += sizeof(*d);
- domaincount++;
- }));
-
- vlib_cli_output(vm, "SIXRD domains structure: %d\n", sizeof (sixrd_domain_t));
- vlib_cli_output(vm, "SIXRD domains: %d (%d bytes)\n", domaincount, domains);
-
- return 0;
-}
-
-/*
- * packet trace format function
- */
-u8 *
-format_sixrd_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 *);
- sixrd_trace_t *t = va_arg (*args, sixrd_trace_t *);
- u32 sixrd_domain_index = t->sixrd_domain_index;
-
- s = format(s, "SIXRD domain index: %d", sixrd_domain_index);
-
- return s;
-}
-
-VLIB_CLI_COMMAND(sixrd_add_domain_command, static) = {
- .path = "sixrd add domain",
- .short_help =
- "sixrd add domain ip6-pfx <ip6-pfx> ip4-pfx <ip4-pfx> ip4-src <ip4-addr>",
- .function = sixrd_add_domain_command_fn,
-};
-
-VLIB_CLI_COMMAND(sixrd_del_command, static) = {
- .path = "sixrd del domain",
- .short_help =
- "sixrd del domain index <domain>",
- .function = sixrd_del_domain_command_fn,
-};
-
-VLIB_CLI_COMMAND(show_sixrd_domain_command, static) = {
- .path = "show sixrd domain",
- .function = show_sixrd_domain_command_fn,
-};
-
-VLIB_CLI_COMMAND(show_sixrd_stats_command, static) = {
- .path = "show sixrd stats",
- .function = show_sixrd_stats_command_fn,
-};
-
-/*
- * This routine exists to convince the vlib plugin framework that
- * we haven't accidentally copied a random .dll into the plugin directory.
- *
- * Also collects global variable pointers passed from the vpp engine
- */
-clib_error_t *
-vlib_plugin_register (vlib_main_t * vm, vnet_plugin_handoff_t * h,
- int from_early_init)
-{
- clib_error_t * error = 0;
- sixrd_main_t *mm = &sixrd_main;
-
- mm->vnet_main = vnet_get_main();
- mm->vlib_main = vm;
-
- return error;
-}
-
-static clib_error_t * sixrd_init (vlib_main_t * vm)
-{
- sixrd_dpo_module_init ();
-
- return (NULL);
-}
-
-VLIB_INIT_FUNCTION (sixrd_init);
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