diff options
Diffstat (limited to 'vpp/plugins/sixrd-plugin/sixrd/sixrd.c')
| -rw-r--r-- | vpp/plugins/sixrd-plugin/sixrd/sixrd.c | 369 |
1 files changed, 369 insertions, 0 deletions
diff --git a/vpp/plugins/sixrd-plugin/sixrd/sixrd.c b/vpp/plugins/sixrd-plugin/sixrd/sixrd.c new file mode 100644 index 00000000..66e631a2 --- /dev/null +++ b/vpp/plugins/sixrd-plugin/sixrd/sixrd.c @@ -0,0 +1,369 @@ +/* + * 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); |