diff options
Diffstat (limited to 'plugins/acl-plugin/acl/acl.c')
| -rw-r--r-- | plugins/acl-plugin/acl/acl.c | 1881 |
1 files changed, 1881 insertions, 0 deletions
diff --git a/plugins/acl-plugin/acl/acl.c b/plugins/acl-plugin/acl/acl.c new file mode 100644 index 00000000..149f006d --- /dev/null +++ b/plugins/acl-plugin/acl/acl.c @@ -0,0 +1,1881 @@ +/* + * Copyright (c) 2016 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 <vnet/plugin/plugin.h> +#include <acl/acl.h> +#include <acl/l2sess.h> + +#include <vnet/l2/l2_classify.h> +#include <vnet/classify/input_acl.h> + +#include <vlibapi/api.h> +#include <vlibmemory/api.h> +#include <vlibsocket/api.h> + +/* define message IDs */ +#include <acl/acl_msg_enum.h> + +/* define message structures */ +#define vl_typedefs +#include <acl/acl_all_api_h.h> +#undef vl_typedefs + +/* define generated endian-swappers */ +#define vl_endianfun +#include <acl/acl_all_api_h.h> +#undef vl_endianfun + +/* instantiate all the print functions we know about */ +#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__) +#define vl_printfun +#include <acl/acl_all_api_h.h> +#undef vl_printfun + +/* Get the API version number */ +#define vl_api_version(n,v) static u32 api_version=(v); +#include <acl/acl_all_api_h.h> +#undef vl_api_version + +#include "node_in.h" +#include "node_out.h" + +acl_main_t acl_main; + +/* + * A handy macro to set up a message reply. + * Assumes that the following variables are available: + * mp - pointer to request message + * rmp - pointer to reply message type + * rv - return value + */ + +#define REPLY_MACRO(t) \ +do { \ + unix_shared_memory_queue_t * q = \ + vl_api_client_index_to_input_queue (mp->client_index); \ + if (!q) \ + return; \ + \ + rmp = vl_msg_api_alloc (sizeof (*rmp)); \ + rmp->_vl_msg_id = ntohs((t)+sm->msg_id_base); \ + rmp->context = mp->context; \ + rmp->retval = ntohl(rv); \ + \ + vl_msg_api_send_shmem (q, (u8 *)&rmp); \ +} while(0); + +#define REPLY_MACRO2(t, body) \ +do { \ + unix_shared_memory_queue_t * q; \ + rv = vl_msg_api_pd_handler (mp, rv); \ + q = vl_api_client_index_to_input_queue (mp->client_index); \ + if (!q) \ + return; \ + \ + rmp = vl_msg_api_alloc (sizeof (*rmp)); \ + rmp->_vl_msg_id = ntohs((t)+am->msg_id_base); \ + rmp->context = mp->context; \ + rmp->retval = ntohl(rv); \ + do {body;} while (0); \ + vl_msg_api_send_shmem (q, (u8 *)&rmp); \ +} while(0); + +#define REPLY_MACRO3(t, n, body) \ +do { \ + unix_shared_memory_queue_t * q; \ + rv = vl_msg_api_pd_handler (mp, rv); \ + q = vl_api_client_index_to_input_queue (mp->client_index); \ + if (!q) \ + return; \ + \ + rmp = vl_msg_api_alloc (sizeof (*rmp) + n); \ + rmp->_vl_msg_id = ntohs((t)+am->msg_id_base); \ + rmp->context = mp->context; \ + rmp->retval = ntohl(rv); \ + do {body;} while (0); \ + vl_msg_api_send_shmem (q, (u8 *)&rmp); \ +} while(0); + +#define VALIDATE_SW_IF_INDEX(mp) \ + do { u32 __sw_if_index = ntohl(mp->sw_if_index); \ + vnet_main_t *__vnm = vnet_get_main(); \ + if (pool_is_free_index(__vnm->interface_main.sw_interfaces, \ + __sw_if_index)) { \ + rv = VNET_API_ERROR_INVALID_SW_IF_INDEX; \ + goto bad_sw_if_index; \ + } \ +} while(0); + +#define BAD_SW_IF_INDEX_LABEL \ +do { \ +bad_sw_if_index: \ + ; \ +} while (0); + + + +/* List of message types that this plugin understands */ + +#define foreach_acl_plugin_api_msg \ +_(ACL_PLUGIN_GET_VERSION, acl_plugin_get_version) \ +_(ACL_ADD_REPLACE, acl_add_replace) \ +_(ACL_DEL, acl_del) \ +_(ACL_INTERFACE_ADD_DEL, acl_interface_add_del) \ +_(ACL_INTERFACE_SET_ACL_LIST, acl_interface_set_acl_list) \ +_(ACL_DUMP, acl_dump) \ +_(ACL_INTERFACE_LIST_DUMP, acl_interface_list_dump) \ +_(MACIP_ACL_ADD, macip_acl_add) \ +_(MACIP_ACL_DEL, macip_acl_del) \ +_(MACIP_ACL_INTERFACE_ADD_DEL, macip_acl_interface_add_del) \ +_(MACIP_ACL_DUMP, macip_acl_dump) \ +_(MACIP_ACL_INTERFACE_GET, macip_acl_interface_get) + +/* + * 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) +{ + acl_main_t *am = &acl_main; + clib_error_t *error = 0; + + am->vlib_main = vm; + am->vnet_main = h->vnet_main; + am->ethernet_main = h->ethernet_main; + + l2sess_vlib_plugin_register(vm, h, from_early_init); + + return error; +} + + +static void +vl_api_acl_plugin_get_version_t_handler (vl_api_acl_plugin_get_version_t * mp) +{ + acl_main_t *am = &acl_main; + vl_api_acl_plugin_get_version_reply_t *rmp; + int msg_size = sizeof (*rmp); + unix_shared_memory_queue_t *q; + + q = vl_api_client_index_to_input_queue (mp->client_index); + if (q == 0) + { + return; + } + + rmp = vl_msg_api_alloc (msg_size); + memset (rmp, 0, msg_size); + rmp->_vl_msg_id = + ntohs (VL_API_ACL_PLUGIN_GET_VERSION_REPLY + am->msg_id_base); + rmp->context = mp->context; + rmp->major = htonl (ACL_PLUGIN_VERSION_MAJOR); + rmp->minor = htonl (ACL_PLUGIN_VERSION_MINOR); + + vl_msg_api_send_shmem (q, (u8 *) & rmp); +} + + +static int +acl_add_list (u32 count, vl_api_acl_rule_t rules[], + u32 * acl_list_index, u8 * tag) +{ + acl_main_t *am = &acl_main; + acl_list_t *a; + acl_rule_t *r; + acl_rule_t *acl_new_rules; + int i; + + if (*acl_list_index != ~0) + { + /* They supplied some number, let's see if this ACL exists */ + if (pool_is_free_index (am->acls, *acl_list_index)) + { + /* tried to replace a non-existent ACL, no point doing anything */ + return -1; + } + } + + /* Create and populate the rules */ + acl_new_rules = clib_mem_alloc_aligned (sizeof (acl_rule_t) * count, + CLIB_CACHE_LINE_BYTES); + if (!acl_new_rules) + { + /* Could not allocate rules. New or existing ACL - bail out regardless */ + return -1; + } + + for (i = 0; i < count; i++) + { + r = &acl_new_rules[i]; + r->is_permit = rules[i].is_permit; + r->is_ipv6 = rules[i].is_ipv6; + if (r->is_ipv6) + { + memcpy (&r->src, rules[i].src_ip_addr, sizeof (r->src)); + memcpy (&r->dst, rules[i].dst_ip_addr, sizeof (r->dst)); + } + else + { + memcpy (&r->src.ip4, rules[i].src_ip_addr, sizeof (r->src.ip4)); + memcpy (&r->dst.ip4, rules[i].dst_ip_addr, sizeof (r->dst.ip4)); + } + r->src_prefixlen = rules[i].src_ip_prefix_len; + r->dst_prefixlen = rules[i].dst_ip_prefix_len; + r->proto = rules[i].proto; + r->src_port_or_type_first = rules[i].srcport_or_icmptype_first; + r->src_port_or_type_last = rules[i].srcport_or_icmptype_last; + r->dst_port_or_code_first = rules[i].dstport_or_icmpcode_first; + r->dst_port_or_code_last = rules[i].dstport_or_icmpcode_last; + r->tcp_flags_value = rules[i].tcp_flags_value; + r->tcp_flags_mask = rules[i].tcp_flags_mask; + } + + if (~0 == *acl_list_index) + { + /* Get ACL index */ + pool_get_aligned (am->acls, a, CLIB_CACHE_LINE_BYTES); + memset (a, 0, sizeof (*a)); + /* Will return the newly allocated ACL index */ + *acl_list_index = a - am->acls; + } + else + { + a = am->acls + *acl_list_index; + /* Get rid of the old rules */ + clib_mem_free (a->rules); + } + a->rules = acl_new_rules; + a->count = count; + memcpy (a->tag, tag, sizeof (a->tag)); + + return 0; +} + +static int +acl_del_list (u32 acl_list_index) +{ + acl_main_t *am = &acl_main; + acl_list_t *a; + int i, ii; + if (pool_is_free_index (am->acls, acl_list_index)) + { + return -1; + } + + /* delete any references to the ACL */ + for (i = 0; i < vec_len (am->output_acl_vec_by_sw_if_index); i++) + { + for (ii = 0; ii < vec_len (am->output_acl_vec_by_sw_if_index[i]); + /* see body */ ) + { + if (acl_list_index == am->output_acl_vec_by_sw_if_index[i][ii]) + { + vec_del1 (am->output_acl_vec_by_sw_if_index[i], ii); + } + else + { + ii++; + } + } + } + for (i = 0; i < vec_len (am->input_acl_vec_by_sw_if_index); i++) + { + for (ii = 0; ii < vec_len (am->input_acl_vec_by_sw_if_index[i]); + /* see body */ ) + { + if (acl_list_index == am->input_acl_vec_by_sw_if_index[i][ii]) + { + vec_del1 (am->input_acl_vec_by_sw_if_index[i], ii); + } + else + { + ii++; + } + } + } + + /* now we can delete the ACL itself */ + a = &am->acls[acl_list_index]; + if (a->rules) + { + clib_mem_free (a->rules); + } + pool_put (am->acls, a); + return 0; +} + +/* Some aids in ASCII graphing the content */ +#define XX "\377" +#define __ "\000" +#define _(x) +#define v + +u8 ip4_5tuple_mask[] = +_(" dmac smac etype ") +_(ether) __ __ __ __ __ __ v __ __ __ __ __ __ v __ __ v + _(" v ihl totlen ") + _(0x0000) + __ __ __ __ + _(" ident fl+fo ") + _(0x0004) + __ __ __ __ + _(" ttl pr checksum ") + _(0x0008) + __ XX __ __ + _(" src address ") + _(0x000C) + XX XX XX XX + _(" dst address ") + _(0x0010) + XX XX XX XX + _("L4 T/U sport dport ") + _(tcpudp) + XX XX XX XX + _(padpad) + __ __ __ __ + _(padpad) + __ __ __ __ + _(padeth) + __ __; + + u8 ip6_5tuple_mask[] = + _(" dmac smac etype ") + _(ether) __ __ __ __ __ __ v __ __ __ __ __ __ v __ __ v + _(" v tc + flow ") + _(0x0000) __ __ __ __ + _(" plen nh hl ") + _(0x0004) __ __ XX __ + _(" src address ") + _(0x0008) XX XX XX XX + _(0x000C) XX XX XX XX + _(0x0010) XX XX XX XX + _(0x0014) XX XX XX XX + _(" dst address ") + _(0x0018) XX XX XX XX + _(0x001C) XX XX XX XX + _(0x0020) XX XX XX XX + _(0x0024) XX XX XX XX + _("L4T/U sport dport ") + _(tcpudp) XX XX XX XX _(padpad) __ __ __ __ _(padeth) __ __; + +#undef XX +#undef __ +#undef _ +#undef v + + static int count_skip (u8 * p, u32 size) +{ + u64 *p64 = (u64 *) p; + /* Be tolerant to null pointer */ + if (0 == p) + return 0; + + while ((0ULL == *p64) && ((u8 *) p64 - p) < size) + { + p64++; + } + return (p64 - (u64 *) p) / 2; +} + +static int +acl_classify_add_del_table_big (vnet_classify_main_t * cm, u8 * mask, + u32 mask_len, u32 next_table_index, + u32 miss_next_index, u32 * table_index, + int is_add) +{ + u32 nbuckets = 65536; + u32 memory_size = 2 << 30; + u32 skip = count_skip (mask, mask_len); + u32 match = (mask_len / 16) - skip; + u8 *skip_mask_ptr = mask + 16 * skip; + u32 current_data_flag = 0; + int current_data_offset = 0; + + if (0 == match) + match = 1; + + return vnet_classify_add_del_table (cm, skip_mask_ptr, nbuckets, + memory_size, skip, match, + next_table_index, miss_next_index, + table_index, current_data_flag, + current_data_offset, is_add); +} + +static int +acl_classify_add_del_table_small (vnet_classify_main_t * cm, u8 * mask, + u32 mask_len, u32 next_table_index, + u32 miss_next_index, u32 * table_index, + int is_add) +{ + u32 nbuckets = 32; + u32 memory_size = 2 << 20; + u32 skip = count_skip (mask, mask_len); + u32 match = (mask_len / 16) - skip; + u8 *skip_mask_ptr = mask + 16 * skip; + u32 current_data_flag = 0; + int current_data_offset = 0; + + if (0 == match) + match = 1; + + return vnet_classify_add_del_table (cm, skip_mask_ptr, nbuckets, + memory_size, skip, match, + next_table_index, miss_next_index, + table_index, current_data_flag, + current_data_offset, is_add); +} + + +static int +acl_unhook_l2_input_classify (acl_main_t * am, u32 sw_if_index) +{ + vnet_classify_main_t *cm = &vnet_classify_main; + u32 ip4_table_index = ~0; + u32 ip6_table_index = ~0; + + vec_validate_init_empty (am->acl_ip4_input_classify_table_by_sw_if_index, + sw_if_index, ~0); + vec_validate_init_empty (am->acl_ip6_input_classify_table_by_sw_if_index, + sw_if_index, ~0); + + vnet_l2_input_classify_enable_disable (sw_if_index, 0); + + if (am->acl_ip4_input_classify_table_by_sw_if_index[sw_if_index] != ~0) + { + ip4_table_index = + am->acl_ip4_input_classify_table_by_sw_if_index[sw_if_index]; + am->acl_ip4_input_classify_table_by_sw_if_index[sw_if_index] = ~0; + acl_classify_add_del_table_big (cm, ip4_5tuple_mask, + sizeof (ip4_5tuple_mask) - 1, ~0, + am->l2_input_classify_next_acl, + &ip4_table_index, 0); + } + if (am->acl_ip6_input_classify_table_by_sw_if_index[sw_if_index] != ~0) + { + ip6_table_index = + am->acl_ip6_input_classify_table_by_sw_if_index[sw_if_index]; + am->acl_ip6_input_classify_table_by_sw_if_index[sw_if_index] = ~0; + acl_classify_add_del_table_big (cm, ip6_5tuple_mask, + sizeof (ip6_5tuple_mask) - 1, ~0, + am->l2_input_classify_next_acl, + &ip6_table_index, 0); + } + + return 0; +} + +static int +acl_unhook_l2_output_classify (acl_main_t * am, u32 sw_if_index) +{ + vnet_classify_main_t *cm = &vnet_classify_main; + u32 ip4_table_index = ~0; + u32 ip6_table_index = ~0; + + vec_validate_init_empty (am->acl_ip4_output_classify_table_by_sw_if_index, + sw_if_index, ~0); + vec_validate_init_empty (am->acl_ip6_output_classify_table_by_sw_if_index, + sw_if_index, ~0); + + vnet_l2_output_classify_enable_disable (sw_if_index, 0); + + if (am->acl_ip4_output_classify_table_by_sw_if_index[sw_if_index] != ~0) + { + ip4_table_index = + am->acl_ip4_output_classify_table_by_sw_if_index[sw_if_index]; + am->acl_ip4_output_classify_table_by_sw_if_index[sw_if_index] = ~0; + acl_classify_add_del_table_big (cm, ip4_5tuple_mask, + sizeof (ip4_5tuple_mask) - 1, ~0, + am->l2_output_classify_next_acl, + &ip4_table_index, 0); + } + if (am->acl_ip6_output_classify_table_by_sw_if_index[sw_if_index] != ~0) + { + ip6_table_index = + am->acl_ip6_output_classify_table_by_sw_if_index[sw_if_index]; + am->acl_ip6_output_classify_table_by_sw_if_index[sw_if_index] = ~0; + acl_classify_add_del_table_big (cm, ip6_5tuple_mask, + sizeof (ip6_5tuple_mask) - 1, ~0, + am->l2_output_classify_next_acl, + &ip6_table_index, 0); + } + + return 0; +} + +static int +acl_hook_l2_input_classify (acl_main_t * am, u32 sw_if_index) +{ + vnet_classify_main_t *cm = &vnet_classify_main; + u32 ip4_table_index = ~0; + u32 ip6_table_index = ~0; + int rv; + + /* in case there were previous tables attached */ + acl_unhook_l2_input_classify (am, sw_if_index); + rv = + acl_classify_add_del_table_big (cm, ip4_5tuple_mask, + sizeof (ip4_5tuple_mask) - 1, ~0, + am->l2_input_classify_next_acl, + &ip4_table_index, 1); + if (rv) + return rv; + rv = + acl_classify_add_del_table_big (cm, ip6_5tuple_mask, + sizeof (ip6_5tuple_mask) - 1, ~0, + am->l2_input_classify_next_acl, + &ip6_table_index, 1); + if (rv) + { + acl_classify_add_del_table_big (cm, ip4_5tuple_mask, + sizeof (ip4_5tuple_mask) - 1, ~0, + am->l2_input_classify_next_acl, + &ip4_table_index, 0); + return rv; + } + rv = + vnet_l2_input_classify_set_tables (sw_if_index, ip4_table_index, + ip6_table_index, ~0); + clib_warning + ("ACL enabling on interface sw_if_index %d, setting tables to the following: ip4: %d ip6: %d\n", + sw_if_index, ip4_table_index, ip6_table_index); + if (rv) + { + acl_classify_add_del_table_big (cm, ip6_5tuple_mask, + sizeof (ip6_5tuple_mask) - 1, ~0, + am->l2_input_classify_next_acl, + &ip6_table_index, 0); + acl_classify_add_del_table_big (cm, ip4_5tuple_mask, + sizeof (ip4_5tuple_mask) - 1, ~0, + am->l2_input_classify_next_acl, + &ip4_table_index, 0); + return rv; + } + + am->acl_ip4_input_classify_table_by_sw_if_index[sw_if_index] = + ip4_table_index; + am->acl_ip6_input_classify_table_by_sw_if_index[sw_if_index] = + ip6_table_index; + + vnet_l2_input_classify_enable_disable (sw_if_index, 1); + return rv; +} + +static int +acl_hook_l2_output_classify (acl_main_t * am, u32 sw_if_index) +{ + vnet_classify_main_t *cm = &vnet_classify_main; + u32 ip4_table_index = ~0; + u32 ip6_table_index = ~0; + int rv; + + /* in case there were previous tables attached */ + acl_unhook_l2_output_classify (am, sw_if_index); + rv = + acl_classify_add_del_table_big (cm, ip4_5tuple_mask, + sizeof (ip4_5tuple_mask) - 1, ~0, + am->l2_output_classify_next_acl, + &ip4_table_index, 1); + if (rv) + return rv; + rv = + acl_classify_add_del_table_big (cm, ip6_5tuple_mask, + sizeof (ip6_5tuple_mask) - 1, ~0, + am->l2_output_classify_next_acl, + &ip6_table_index, 1); + if (rv) + { + acl_classify_add_del_table_big (cm, ip4_5tuple_mask, + sizeof (ip4_5tuple_mask) - 1, ~0, + am->l2_output_classify_next_acl, + &ip4_table_index, 0); + return rv; + } + rv = + vnet_l2_output_classify_set_tables (sw_if_index, ip4_table_index, + ip6_table_index, ~0); + clib_warning + ("ACL enabling on interface sw_if_index %d, setting tables to the following: ip4: %d ip6: %d\n", + sw_if_index, ip4_table_index, ip6_table_index); + if (rv) + { + acl_classify_add_del_table_big (cm, ip6_5tuple_mask, + sizeof (ip6_5tuple_mask) - 1, ~0, + am->l2_output_classify_next_acl, + &ip6_table_index, 0); + acl_classify_add_del_table_big (cm, ip4_5tuple_mask, + sizeof (ip4_5tuple_mask) - 1, ~0, + am->l2_output_classify_next_acl, + &ip4_table_index, 0); + return rv; + } + + am->acl_ip4_output_classify_table_by_sw_if_index[sw_if_index] = + ip4_table_index; + am->acl_ip6_output_classify_table_by_sw_if_index[sw_if_index] = + ip6_table_index; + + vnet_l2_output_classify_enable_disable (sw_if_index, 1); + return rv; +} + + +int +acl_interface_in_enable_disable (acl_main_t * am, u32 sw_if_index, + int enable_disable) +{ + int rv; + + /* Utterly wrong? */ + if (pool_is_free_index (am->vnet_main->interface_main.sw_interfaces, + sw_if_index)) + return VNET_API_ERROR_INVALID_SW_IF_INDEX; + + if (enable_disable) + { + rv = acl_hook_l2_input_classify (am, sw_if_index); + } + else + { + rv = acl_unhook_l2_input_classify (am, sw_if_index); + } + + return rv; +} + +int +acl_interface_out_enable_disable (acl_main_t * am, u32 sw_if_index, + int enable_disable) +{ + int rv; + + /* Utterly wrong? */ + if (pool_is_free_index (am->vnet_main->interface_main.sw_interfaces, + sw_if_index)) + return VNET_API_ERROR_INVALID_SW_IF_INDEX; + + if (enable_disable) + { + rv = acl_hook_l2_output_classify (am, sw_if_index); + } + else + { + rv = acl_unhook_l2_output_classify (am, sw_if_index); + } + + return rv; +} + + +static int +acl_interface_add_inout_acl (u32 sw_if_index, u8 is_input, u32 acl_list_index) +{ + acl_main_t *am = &acl_main; + if (is_input) + { + vec_validate (am->input_acl_vec_by_sw_if_index, sw_if_index); + vec_add (am->input_acl_vec_by_sw_if_index[sw_if_index], &acl_list_index, + 1); + acl_interface_in_enable_disable (am, sw_if_index, 1); + } + else + { + vec_validate (am->output_acl_vec_by_sw_if_index, sw_if_index); + vec_add (am->output_acl_vec_by_sw_if_index[sw_if_index], + &acl_list_index, 1); + acl_interface_out_enable_disable (am, sw_if_index, 1); + } + return 0; +} + +static int +acl_interface_del_inout_acl (u32 sw_if_index, u8 is_input, u32 acl_list_index) +{ + acl_main_t *am = &acl_main; + int i; + int rv = -1; + if (is_input) + { + vec_validate (am->input_acl_vec_by_sw_if_index, sw_if_index); + for (i = 0; i < vec_len (am->input_acl_vec_by_sw_if_index[sw_if_index]); + i++) + { + if (acl_list_index == + am->input_acl_vec_by_sw_if_index[sw_if_index][i]) + { + vec_del1 (am->input_acl_vec_by_sw_if_index[sw_if_index], i); + rv = 0; + break; + } + } + if (0 == vec_len (am->input_acl_vec_by_sw_if_index[sw_if_index])) + { + acl_interface_in_enable_disable (am, sw_if_index, 0); + } + } + else + { + vec_validate (am->output_acl_vec_by_sw_if_index, sw_if_index); + for (i = 0; + i < vec_len (am->output_acl_vec_by_sw_if_index[sw_if_index]); i++) + { + if (acl_list_index == + am->output_acl_vec_by_sw_if_index[sw_if_index][i]) + { + vec_del1 (am->output_acl_vec_by_sw_if_index[sw_if_index], i); + rv = 0; + break; + } + } + if (0 == vec_len (am->output_acl_vec_by_sw_if_index[sw_if_index])) + { + acl_interface_out_enable_disable (am, sw_if_index, 0); + } + } + return rv; +} + +static void +acl_interface_reset_inout_acls (u32 sw_if_index, u8 is_input) +{ + acl_main_t *am = &acl_main; + if (is_input) + { + acl_interface_in_enable_disable (am, sw_if_index, 0); + vec_validate (am->input_acl_vec_by_sw_if_index, sw_if_index); + vec_reset_length (am->input_acl_vec_by_sw_if_index[sw_if_index]); + } + else + { + acl_interface_out_enable_disable (am, sw_if_index, 0); + vec_validate (am->output_acl_vec_by_sw_if_index, sw_if_index); + vec_reset_length (am->output_acl_vec_by_sw_if_index[sw_if_index]); + } +} + +static int +acl_interface_add_del_inout_acl (u32 sw_if_index, u8 is_add, u8 is_input, + u32 acl_list_index) +{ + int rv = -1; + if (is_add) + { + rv = + acl_interface_add_inout_acl (sw_if_index, is_input, acl_list_index); + } + else + { + rv = + acl_interface_del_inout_acl (sw_if_index, is_input, acl_list_index); + } + return rv; +} + + +static void * +get_ptr_to_offset (vlib_buffer_t * b0, int offset) +{ + u8 *p = vlib_buffer_get_current (b0) + offset; + return p; +} + +static u8 +acl_get_l4_proto (vlib_buffer_t * b0, int node_is_ip6) +{ + u8 proto; + int proto_offset; + if (node_is_ip6) + { + proto_offset = 20; + } + else + { + proto_offset = 23; + } + proto = *((u8 *) vlib_buffer_get_current (b0) + proto_offset); + return proto; +} + +static int +acl_match_addr (ip46_address_t * addr1, ip46_address_t * addr2, int prefixlen, + int is_ip6) +{ + if (prefixlen == 0) + { + /* match any always succeeds */ + return 1; + } + if (is_ip6) + { + if (memcmp (addr1, addr2, prefixlen / 8)) + { + /* If the starting full bytes do not match, no point in bittwidling the thumbs further */ + return 0; + } + if (prefixlen % 8) + { + u8 b1 = *((u8 *) addr1 + 1 + prefixlen / 8); + u8 b2 = *((u8 *) addr2 + 1 + prefixlen / 8); + u8 mask0 = (0xff - ((1 << (8 - (prefixlen % 8))) - 1)); + return (b1 & mask0) == b2; + } + else + { + /* The prefix fits into integer number of bytes, so nothing left to do */ + return 1; + } + } + else + { + uint32_t a1 = ntohl (addr1->ip4.as_u32); + uint32_t a2 = ntohl (addr2->ip4.as_u32); + uint32_t mask0 = 0xffffffff - ((1 << (32 - prefixlen)) - 1); + return (a1 & mask0) == a2; + } +} + +static int +acl_match_port (u16 port, u16 port_first, u16 port_last, int is_ip6) +{ + return ((port >= port_first) && (port <= port_last)); +} + +static int +acl_packet_match (acl_main_t * am, u32 acl_index, vlib_buffer_t * b0, + u8 * r_action, int *r_is_ip6, u32 * r_acl_match_p, + u32 * r_rule_match_p, u32 * trace_bitmap) +{ + ethernet_header_t *h0; + u16 type0; + + ip46_address_t src, dst; + int is_ip6; + int is_ip4; + u8 proto; + u16 src_port; + u16 dst_port; + u8 tcp_flags = 0; + int i; + acl_list_t *a; + acl_rule_t *r; + + h0 = vlib_buffer_get_current (b0); + type0 = clib_net_to_host_u16 (h0->type); + is_ip4 = (type0 == ETHERNET_TYPE_IP4); + is_ip6 = (type0 == ETHERNET_TYPE_IP6); + + if (!(is_ip4 || is_ip6)) + { + return 0; + } + /* The bunch of hardcoded offsets here is intentional to get rid of them + ASAP, when getting to a faster matching code */ + if (is_ip4) + { + clib_memcpy (&src.ip4, get_ptr_to_offset (b0, 26), 4); + clib_memcpy (&dst.ip4, get_ptr_to_offset (b0, 30), 4); + proto = acl_get_l4_proto (b0, 0); + if (1 == proto) + { + *trace_bitmap |= 0x00000001; + /* type */ + src_port = *(u8 *) get_ptr_to_offset (b0, 34); + /* code */ + dst_port = *(u8 *) get_ptr_to_offset (b0, 35); + } + else + { + /* assume TCP/UDP */ + src_port = (*(u16 *) get_ptr_to_offset (b0, 34)); + dst_port = (*(u16 *) get_ptr_to_offset (b0, 36)); + /* UDP gets ability to check on an oddball data byte as a bonus */ + tcp_flags = *(u8 *) get_ptr_to_offset (b0, 14 + 20 + 13); + } + } + else /* is_ipv6 implicitly */ + { + clib_memcpy (&src, get_ptr_to_offset (b0, 22), 16); + clib_memcpy (&dst, get_ptr_to_offset (b0, 38), 16); + proto = acl_get_l4_proto (b0, 1); + if (58 == proto) + { + *trace_bitmap |= 0x00000002; + /* type */ + src_port = *(u8 *) get_ptr_to_offset (b0, 54); + /* code */ + dst_port = *(u8 *) get_ptr_to_offset (b0, 55); + } + else + { + /* assume TCP/UDP */ + src_port = (*(u16 *) get_ptr_to_offset (b0, 54)); + dst_port = (*(u16 *) get_ptr_to_offset (b0, 56)); + tcp_flags = *(u8 *) get_ptr_to_offset (b0, 14 + 40 + 13); + } + } + if (pool_is_free_index (am->acls, acl_index)) + { + if (r_acl_match_p) + *r_acl_match_p = acl_index; + if (r_rule_match_p) + *r_rule_match_p = -1; + /* the ACL does not exist but is used for policy. Block traffic. */ + return 0; + } + a = am->acls + acl_index; + for (i = 0; i < a->count; i++) + { + r = a->rules + i; + if (is_ip6 != r->is_ipv6) + { + continue; + } + if (!acl_match_addr (&dst, &r->dst, r->dst_prefixlen, is_ip6)) + continue; + if (!acl_match_addr (&src, &r->src, r->src_prefixlen, is_ip6)) + continue; + if (r->proto) + { + if (proto != r->proto) + continue; + if (!acl_match_port + (src_port, r->src_port_or_type_first, r->src_port_or_type_last, + is_ip6)) + continue; + if (!acl_match_port + (dst_port, r->dst_port_or_code_first, r->dst_port_or_code_last, + is_ip6)) + continue; + /* No need for check of proto == TCP, since in other rules both fields should be zero, so this match will succeed */ + if ((tcp_flags & r->tcp_flags_mask) != r->tcp_flags_value) + continue; + } + /* everything matches! */ + *r_action = r->is_permit; + *r_is_ip6 = is_ip6; + if (r_acl_match_p) + *r_acl_match_p = acl_index; + if (r_rule_match_p) + *r_rule_match_p = i; + return 1; + } + return 0; +} + +void +input_acl_packet_match (u32 sw_if_index, vlib_buffer_t * b0, u32 * nextp, + u32 * acl_match_p, u32 * rule_match_p, + u32 * trace_bitmap) +{ + acl_main_t *am = &acl_main; + uint8_t action = 0; + int is_ip6 = 0; + int i; + vec_validate (am->input_acl_vec_by_sw_if_index, sw_if_index); + for (i = 0; i < vec_len (am->input_acl_vec_by_sw_if_index[sw_if_index]); + i++) + { + if (acl_packet_match + (am, am->input_acl_vec_by_sw_if_index[sw_if_index][i], b0, &action, + &is_ip6, acl_match_p, rule_match_p, trace_bitmap)) + { + if (is_ip6) + { + *nextp = am->acl_in_ip6_match_next[action]; + } + else + { + *nextp = am->acl_in_ip4_match_next[action]; + } + return; + } + } + if (vec_len (am->input_acl_vec_by_sw_if_index[sw_if_index]) > 0) + { + /* If there are ACLs and none matched, deny by default */ + *nextp = 0; + } + +} + +void +output_acl_packet_match (u32 sw_if_index, vlib_buffer_t * b0, u32 * nextp, + u32 * acl_match_p, u32 * rule_match_p, + u32 * trace_bitmap) +{ + acl_main_t *am = &acl_main; + uint8_t action = 0; + int is_ip6 = 0; + int i; + vec_validate (am->output_acl_vec_by_sw_if_index, sw_if_index); + for (i = 0; i < vec_len (am->output_acl_vec_by_sw_if_index[sw_if_index]); + i++) + { + if (acl_packet_match + (am, am->output_acl_vec_by_sw_if_index[sw_if_index][i], b0, &action, + &is_ip6, acl_match_p, rule_match_p, trace_bitmap)) + { + if (is_ip6) + { + *nextp = am->acl_out_ip6_match_next[action]; + } + else + { + *nextp = am->acl_out_ip4_match_next[action]; + } + return; + } + } + if (vec_len (am->output_acl_vec_by_sw_if_index[sw_if_index]) > 0) + { + /* If there are ACLs and none matched, deny by default */ + *nextp = 0; + } +} + +typedef struct +{ + u8 is_ipv6; + u8 mac_mask[6]; + u8 prefix_len; + u32 count; + u32 table_index; +} macip_match_type_t; + +static u32 +macip_find_match_type (macip_match_type_t * mv, u8 * mac_mask, u8 prefix_len, + u8 is_ipv6) +{ + u32 i; + if (mv) + { + for (i = 0; i < vec_len (mv); i++) + { + if ((mv[i].prefix_len == prefix_len) && (mv[i].is_ipv6 == is_ipv6) + && (0 == memcmp (mv[i].mac_mask, mac_mask, 6))) + { + return i; + } + } + } + return ~0; +} + + +/* Get metric used to sort match types. + The more specific and the more often seen - the bigger the metric */ +static int +match_type_metric (macip_match_type_t * m) +{ + /* FIXME: count the ones in the MAC mask as well, check how well this heuristic works in real life */ + return m->prefix_len + m->is_ipv6 + 10 * m->count; +} + +static int +match_type_compare (macip_match_type_t * m1, macip_match_type_t * m2) +{ + /* Ascending sort based on the metric values */ + return match_type_metric (m1) - match_type_metric (m2); +} + +static int +macip_create_classify_tables (acl_main_t * am, u32 macip_acl_index) +{ + macip_match_type_t *mvec = NULL; + macip_match_type_t *mt; + macip_acl_list_t *a = &am->macip_acls[macip_acl_index]; + int i; + u32 match_type_index; + u32 last_table; + u8 mask[5 * 16]; + vnet_classify_main_t *cm = &vnet_classify_main; + + /* Count the number of different types of rules */ + for (i = 0; i < a->count; i++) + { + if (~0 == + (match_type_index = + macip_find_match_type (mvec, a->rules[i].src_mac_mask, + a->rules[i].src_prefixlen, + a->rules[i].is_ipv6))) + { + match_type_index = vec_len (mvec); + vec_validate (mvec, match_type_index); + memcpy (mvec[match_type_index].mac_mask, + a->rules[match_type_index].src_mac_mask, 6); + mvec[match_type_index].prefix_len = a->rules[i].src_prefixlen; + mvec[match_type_index].is_ipv6 = a->rules[i].is_ipv6; + mvec[match_type_index].table_index = ~0; + } + mvec[match_type_index].count++; + } + /* Put the most frequently used tables last in the list so we can create classifier tables in reverse order */ + vec_sort_with_function (mvec, match_type_compare); + /* Create the classifier tables */ + last_table = ~0; + vec_foreach (mt, mvec) + { + int mask_len; + int is6 = a->rules[i].is_ipv6; + int l3_src_offs = is6 ? 22 : 26; /* See the ascii art packet format above to verify these */ + memset (mask, 0, sizeof (mask)); + memcpy (&mask[6], mt->mac_mask, 6); + for (i = 0; i < (mt->prefix_len / 8); i++) + { + mask[l3_src_offs + i] = 0xff; + } + if (mt->prefix_len % 8) + { + mask[l3_src_offs + (mt->prefix_len / 8)] = + 0xff - ((1 << (8 - mt->prefix_len % 8)) - 1); + } + mask_len = ((l3_src_offs + (mt->prefix_len / 8)) / 16 + 1) * 16; + acl_classify_add_del_table_small (cm, mask, mask_len, last_table, + (~0 == last_table) ? 0 : ~0, &mt->table_index, + 1); + last_table = mt->table_index; + } + a->ip4_table_index = ~0; + a->ip6_table_index = ~0; + a->l2_table_index = last_table; + + /* Populate the classifier tables with rules from the MACIP ACL */ + for (i = 0; i < a->count; i++) + { + u32 action = 0; + u32 metadata = 0; + int is6 = a->rules[i].is_ipv6; + int l3_src_offs = is6 ? 22 : 26; /* See the ascii art packet format above to verify these */ + memset (mask, 0, sizeof (mask)); + memcpy (&mask[6], a->rules[i].src_mac, 6); + if (is6) + { + memcpy (&mask[l3_src_offs], &a->rules[i].src_ip_addr.ip6, 16); + } + else + { + memcpy (&mask[l3_src_offs], &a->rules[i].src_ip_addr.ip4, 4); + } + match_type_index = + macip_find_match_type (mvec, a->rules[i].src_mac_mask, + a->rules[i].src_prefixlen, + a->rules[i].is_ipv6); + /* add session to table mvec[match_type_index].table_index; */ + vnet_classify_add_del_session (cm, mvec[match_type_index].table_index, + mask, a->rules[i].is_permit ? ~0 : 0, i, + 0, action, metadata, 1); + } + return 0; +} + +static void +macip_destroy_classify_tables (acl_main_t * am, u32 macip_acl_index) +{ + vnet_classify_main_t *cm = &vnet_classify_main; + macip_acl_list_t *a = &am->macip_acls[macip_acl_index]; + + if (a->ip4_table_index != ~0) + { + acl_classify_add_del_table_small (cm, 0, ~0, ~0, ~0, &a->ip4_table_index, 0); + a->ip4_table_index = ~0; + } + if (a->ip6_table_index != ~0) + { + acl_classify_add_del_table_small (cm, 0, ~0, ~0, ~0, &a->ip6_table_index, 0); + a->ip6_table_index = ~0; + } + if (a->l2_table_index != ~0) + { + acl_classify_add_del_table_small (cm, 0, ~0, ~0, ~0, &a->l2_table_index, 0); + a->l2_table_index = ~0; + } +} + +static int +macip_acl_add_list (u32 count, vl_api_macip_acl_rule_t rules[], + u32 * acl_list_index, u8 * tag) +{ + acl_main_t *am = &acl_main; + macip_acl_list_t *a; + macip_acl_rule_t *r; + macip_acl_rule_t *acl_new_rules; + int i; + + /* Create and populate the rules */ + acl_new_rules = clib_mem_alloc_aligned (sizeof (macip_acl_rule_t) * count, + CLIB_CACHE_LINE_BYTES); + if (!acl_new_rules) + { + /* Could not allocate rules. New or existing ACL - bail out regardless */ + return -1; + } + + for (i = 0; i < count; i++) + { + r = &acl_new_rules[i]; + r->is_permit = rules[i].is_permit; + r->is_ipv6 = rules[i].is_ipv6; + memcpy (&r->src_mac, rules[i].src_mac, 6); + memcpy (&r->src_mac_mask, rules[i].src_mac_mask, 6); + + memcpy (&r->src_ip_addr, rules[i].src_ip_addr, sizeof (r->src_ip_addr)); + r->src_prefixlen = rules[i].src_ip_prefix_len; + } + + /* Get ACL index */ + pool_get_aligned (am->macip_acls, a, CLIB_CACHE_LINE_BYTES); + memset (a, 0, sizeof (*a)); + /* Will return the newly allocated ACL index */ + *acl_list_index = a - am->macip_acls; + + a->rules = acl_new_rules; + a->count = count; + memcpy (a->tag, tag, sizeof (a->tag)); + + /* Create and populate the classifer tables */ + macip_create_classify_tables (am, *acl_list_index); + + return 0; +} + + +/* No check for validity of sw_if_index - the callers were supposed to validate */ + +static int +macip_acl_interface_add_acl (acl_main_t * am, u32 sw_if_index, + u32 macip_acl_index) +{ + macip_acl_list_t *a; + int rv; + if (pool_is_free_index (am->macip_acls, macip_acl_index)) + { + return -1; + } + a = &am->macip_acls[macip_acl_index]; + vec_validate_init_empty (am->macip_acl_by_sw_if_index, sw_if_index, ~0); + am->macip_acl_by_sw_if_index[sw_if_index] = macip_acl_index; + /* Apply the classifier tables for L2 ACLs */ + rv = + vnet_set_input_acl_intfc (am->vlib_main, sw_if_index, a->ip4_table_index, + a->ip6_table_index, a->l2_table_index, 1); + return rv; +} + +static int +macip_acl_interface_del_acl (acl_main_t * am, u32 sw_if_index) +{ + int rv; + vec_validate_init_empty (am->macip_acl_by_sw_if_index, sw_if_index, ~0); + am->macip_acl_by_sw_if_index[sw_if_index] = ~0; + /* remove the classifier tables off the interface L2 ACL */ + rv = vnet_set_input_acl_intfc (am->vlib_main, sw_if_index, ~0, ~0, ~0, 0); + return rv; +} + +static int +macip_acl_del_list (u32 acl_list_index) +{ + acl_main_t *am = &acl_main; + macip_acl_list_t *a; + int i; + if (pool_is_free_index (am->macip_acls, acl_list_index)) + { + return -1; + } + + /* delete any references to the ACL */ + for (i = 0; i < vec_len (am->macip_acl_by_sw_if_index); i++) + { + if (am->macip_acl_by_sw_if_index[i] == acl_list_index) + { + macip_acl_interface_del_acl (am, i); + } + } + + /* Now that classifier tables are detached, clean them up */ + macip_destroy_classify_tables (am, acl_list_index); + + /* now we can delete the ACL itself */ + a = &am->macip_acls[acl_list_index]; + if (a->rules) + { + clib_mem_free (a->rules); + } + pool_put (am->macip_acls, a); + return 0; +} + + +static int +macip_acl_interface_add_del_acl (u32 sw_if_index, u8 is_add, + u32 acl_list_index) +{ + acl_main_t *am = &acl_main; + int rv = -1; + if (is_add) + { + rv = macip_acl_interface_add_acl (am, sw_if_index, acl_list_index); + } + else + { + rv = macip_acl_interface_del_acl (am, sw_if_index); + } + return rv; +} + +/* API message handler */ +static void +vl_api_acl_add_replace_t_handler (vl_api_acl_add_replace_t * mp) +{ + vl_api_acl_add_replace_reply_t *rmp; + acl_main_t *am = &acl_main; + int rv; + u32 acl_list_index = ntohl (mp->acl_index); + + rv = acl_add_list (ntohl (mp->count), mp->r, &acl_list_index, mp->tag); + + /* *INDENT-OFF* */ + REPLY_MACRO2(VL_API_ACL_ADD_REPLACE_REPLY, + ({ + rmp->acl_index = htonl(acl_list_index); + })); + /* *INDENT-ON* */ +} + +static void +vl_api_acl_del_t_handler (vl_api_acl_del_t * mp) +{ + acl_main_t *sm = &acl_main; + vl_api_acl_del_reply_t *rmp; + int rv; + + rv = acl_del_list (ntohl (mp->acl_index)); + + REPLY_MACRO (VL_API_ACL_DEL_REPLY); +} + +static void +vl_api_acl_interface_add_del_t_handler (vl_api_acl_interface_add_del_t * mp) +{ + acl_main_t *sm = &acl_main; + vl_api_acl_interface_add_del_reply_t *rmp; + int rv = -1; + VALIDATE_SW_IF_INDEX (mp); + + rv = + acl_interface_add_del_inout_acl (ntohl (mp->sw_if_index), mp->is_add, + mp->is_input, ntohl (mp->acl_index)); + + BAD_SW_IF_INDEX_LABEL; + + REPLY_MACRO (VL_API_ACL_INTERFACE_ADD_DEL_REPLY); +} + +static void +vl_api_acl_interface_set_acl_list_t_handler + (vl_api_acl_interface_set_acl_list_t * mp) +{ + acl_main_t *sm = &acl_main; + vl_api_acl_interface_set_acl_list_reply_t *rmp; + int rv = 0; + int i; + VALIDATE_SW_IF_INDEX (mp); + u32 sw_if_index = ntohl (mp->sw_if_index); + + acl_interface_reset_inout_acls (sw_if_index, 0); + acl_interface_reset_inout_acls (sw_if_index, 1); + + for (i = 0; i < mp->count; i++) + { + acl_interface_add_del_inout_acl (sw_if_index, 1, (i < mp->n_input), + ntohl (mp->acls[i])); + } + + BAD_SW_IF_INDEX_LABEL; + + REPLY_MACRO (VL_API_ACL_INTERFACE_SET_ACL_LIST_REPLY); +} + +static void +copy_acl_rule_to_api_rule (vl_api_acl_rule_t * api_rule, acl_rule_t * r) +{ + api_rule->is_permit = r->is_permit; + api_rule->is_ipv6 = r->is_ipv6; + if(r->is_ipv6) + { + memcpy (api_rule->src_ip_addr, &r->src, sizeof (r->src)); + memcpy (api_rule->dst_ip_addr, &r->dst, sizeof (r->dst)); + } + else + { + memcpy (api_rule->src_ip_addr, &r->src.ip4, sizeof (r->src.ip4)); + memcpy (api_rule->dst_ip_addr, &r->dst.ip4, sizeof (r->dst.ip4)); + } + api_rule->src_ip_prefix_len = r->src_prefixlen; + api_rule->dst_ip_prefix_len = r->dst_prefixlen; + api_rule->proto = r->proto; + api_rule->srcport_or_icmptype_first = r->src_port_or_type_first; + api_rule->srcport_or_icmptype_last = r->src_port_or_type_last; + api_rule->dstport_or_icmpcode_first = r->dst_port_or_code_first; + api_rule->dstport_or_icmpcode_last = r->dst_port_or_code_last; + api_rule->tcp_flags_mask = r->tcp_flags_mask; + api_rule->tcp_flags_value = r->tcp_flags_value; +} + +static void +send_acl_details (acl_main_t * am, unix_shared_memory_queue_t * q, + acl_list_t * acl, u32 context) +{ + vl_api_acl_details_t *mp; + vl_api_acl_rule_t *rules; + int i; + int msg_size = sizeof (*mp) + sizeof (mp->r[0]) * acl->count; + + mp = vl_msg_api_alloc (msg_size); + memset (mp, 0, msg_size); + mp->_vl_msg_id = ntohs (VL_API_ACL_DETAILS + am->msg_id_base); + + /* fill in the message */ + mp->context = context; + mp->count = htonl (acl->count); + mp->acl_index = htonl (acl - am->acls); + memcpy (mp->tag, acl->tag, sizeof (mp->tag)); + // clib_memcpy (mp->r, acl->rules, acl->count * sizeof(acl->rules[0])); + rules = mp->r; + for (i = 0; i < acl->count; i++) + { + copy_acl_rule_to_api_rule (&rules[i], &acl->rules[i]); + } + + clib_warning("Sending acl details for ACL index %d", ntohl(mp->acl_index)); + vl_msg_api_send_shmem (q, (u8 *) & mp); +} + + +static void +vl_api_acl_dump_t_handler (vl_api_acl_dump_t * mp) +{ + acl_main_t *am = &acl_main; + u32 acl_index; + acl_list_t *acl; + + int rv = -1; + unix_shared_memory_queue_t *q; + + q = vl_api_client_index_to_input_queue (mp->client_index); + if (q == 0) + { + return; + } + + if (mp->acl_index == ~0) + { + /* *INDENT-OFF* */ + /* Just dump all ACLs */ + pool_foreach (acl, am->acls, + ({ + send_acl_details(am, q, acl, mp->context); + })); + /* *INDENT-ON* */ + } + else + { + acl_index = ntohl (mp->acl_index); + if (!pool_is_free_index (am->acls, acl_index)) + { + acl = &am->acls[acl_index]; + send_acl_details (am, q, acl, mp->context); + } + } + + if (rv == -1) + { + /* FIXME API: should we signal an error here at all ? */ + return; + } +} + +static void +send_acl_interface_list_details (acl_main_t * am, + unix_shared_memory_queue_t * q, + u32 sw_if_index, u32 context) +{ + vl_api_acl_interface_list_details_t *mp; + int msg_size; + int n_input; + int n_output; + int count; + int i = 0; + + vec_validate (am->input_acl_vec_by_sw_if_index, sw_if_index); + vec_validate (am->output_acl_vec_by_sw_if_index, sw_if_index); + + n_input = vec_len (am->input_acl_vec_by_sw_if_index[sw_if_index]); + n_output = vec_len (am->output_acl_vec_by_sw_if_index[sw_if_index]); + count = n_input + n_output; + + msg_size = sizeof (*mp); + msg_size += sizeof (mp->acls[0]) * count; + + mp = vl_msg_api_alloc (msg_size); + memset (mp, 0, msg_size); + mp->_vl_msg_id = + ntohs (VL_API_ACL_INTERFACE_LIST_DETAILS + am->msg_id_base); + + /* fill in the message */ + mp->context = context; + mp->sw_if_index = htonl (sw_if_index); + mp->count = count; + mp->n_input = n_input; + for (i = 0; i < n_input; i++) + { + mp->acls[i] = htonl (am->input_acl_vec_by_sw_if_index[sw_if_index][i]); + } + for (i = 0; i < n_output; i++) + { + mp->acls[n_input + i] = + htonl (am->output_acl_vec_by_sw_if_index[sw_if_index][i]); + } + + vl_msg_api_send_shmem (q, (u8 *) & mp); +} + +static void +vl_api_acl_interface_list_dump_t_handler (vl_api_acl_interface_list_dump_t * + mp) +{ + acl_main_t *am = &acl_main; + vnet_sw_interface_t *swif; + vnet_interface_main_t *im = &am->vnet_main->interface_main; + + int rv = -1; + u32 sw_if_index; + unix_shared_memory_queue_t *q; + + q = vl_api_client_index_to_input_queue (mp->client_index); + if (q == 0) + { + return; + } + + if (mp->sw_if_index == ~0) + { + /* *INDENT-OFF* */ + pool_foreach (swif, im->sw_interfaces, + ({ + send_acl_interface_list_details(am, q, swif->sw_if_index, mp->context); + })); + /* *INDENT-ON* */ + } + else + { + VALIDATE_SW_IF_INDEX (mp); + sw_if_index = ntohl (mp->sw_if_index); + send_acl_interface_list_details (am, q, sw_if_index, mp->context); + } + return; + + BAD_SW_IF_INDEX_LABEL; + if (rv == -1) + { + /* FIXME API: should we signal an error here at all ? */ + return; + } +} + +/* MACIP ACL API handlers */ + +static void +vl_api_macip_acl_add_t_handler (vl_api_macip_acl_add_t * mp) +{ + vl_api_macip_acl_add_reply_t *rmp; + acl_main_t *am = &acl_main; + int rv; + u32 acl_list_index = ~0; + + rv = + macip_acl_add_list (ntohl (mp->count), mp->r, &acl_list_index, mp->tag); + + /* *INDENT-OFF* */ + REPLY_MACRO2(VL_API_MACIP_ACL_ADD_REPLY, + ({ + rmp->acl_index = htonl(acl_list_index); + })); + /* *INDENT-ON* */ +} + +static void +vl_api_macip_acl_del_t_handler (vl_api_macip_acl_del_t * mp) +{ + acl_main_t *sm = &acl_main; + vl_api_macip_acl_del_reply_t *rmp; + int rv; + + rv = macip_acl_del_list (ntohl (mp->acl_index)); + + REPLY_MACRO (VL_API_MACIP_ACL_DEL_REPLY); +} + +static void +vl_api_macip_acl_interface_add_del_t_handler + (vl_api_macip_acl_interface_add_del_t * mp) +{ + acl_main_t *sm = &acl_main; + vl_api_macip_acl_interface_add_del_reply_t *rmp; + int rv = -1; + VALIDATE_SW_IF_INDEX (mp); + + rv = + macip_acl_interface_add_del_acl (ntohl (mp->sw_if_index), mp->is_add, + ntohl (mp->acl_index)); + + BAD_SW_IF_INDEX_LABEL; + + REPLY_MACRO (VL_API_MACIP_ACL_INTERFACE_ADD_DEL_REPLY); +} + +static void +send_macip_acl_details (acl_main_t * am, unix_shared_memory_queue_t * q, + macip_acl_list_t * acl, u32 context) +{ + vl_api_macip_acl_details_t *mp; + vl_api_macip_acl_rule_t *rules; + macip_acl_rule_t *r; + int i; + int msg_size = sizeof (*mp) + (acl ? sizeof (mp->r[0]) * acl->count : 0); + + mp = vl_msg_api_alloc (msg_size); + memset (mp, 0, msg_size); + mp->_vl_msg_id = ntohs (VL_API_MACIP_ACL_DETAILS + am->msg_id_base); + + /* fill in the message */ + mp->context = context; + if (acl) + { + memcpy (mp->tag, acl->tag, sizeof (mp->tag)); + mp->count = htonl (acl->count); + mp->acl_index = htonl (acl - am->macip_acls); + rules = mp->r; + for (i = 0; i < acl->count; i++) + { + r = &acl->rules[i]; + rules[i].is_permit = r->is_permit; + rules[i].is_ipv6 = r->is_ipv6; + memcpy (rules[i].src_mac, &r->src_mac, sizeof (r->src_mac)); + memcpy (rules[i].src_mac_mask, &r->src_mac_mask, + sizeof (r->src_mac_mask)); + + memcpy (rules[i].src_ip_addr, &r->src_ip_addr, + sizeof (r->src_ip_addr)); + rules[i].src_ip_prefix_len = r->src_prefixlen; + } + } + else + { + /* No martini, no party - no ACL applied to this interface. */ + mp->acl_index = ~0; + mp->count = 0; + } + + vl_msg_api_send_shmem (q, (u8 *) & mp); +} + + +static void +vl_api_macip_acl_dump_t_handler (vl_api_macip_acl_dump_t * mp) +{ + acl_main_t *am = &acl_main; + macip_acl_list_t *acl; + + unix_shared_memory_queue_t *q; + + q = vl_api_client_index_to_input_queue (mp->client_index); + if (q == 0) + { + return; + } + + if (mp->acl_index == ~0) + { + /* Just dump all ACLs for now, with sw_if_index = ~0 */ + pool_foreach (acl, am->macip_acls, ( + { + send_macip_acl_details (am, q, acl, + mp-> + context);} + )); + /* *INDENT-ON* */ + } + else + { + u32 acl_index = ntohl (mp->acl_index); + if (!pool_is_free_index (am->macip_acls, acl_index)) + { + acl = &am->macip_acls[acl_index]; + send_macip_acl_details (am, q, acl, mp->context); + } + } +} + +static void +vl_api_macip_acl_interface_get_t_handler (vl_api_macip_acl_interface_get_t * + mp) +{ + acl_main_t *am = &acl_main; + vl_api_macip_acl_interface_get_reply_t *rmp; + u32 count = vec_len (am->macip_acl_by_sw_if_index); + int msg_size = sizeof (*rmp) + sizeof (rmp->acls[0]) * count; + unix_shared_memory_queue_t *q; + int i; + + q = vl_api_client_index_to_input_queue (mp->client_index); + if (q == 0) + { + return; + } + + rmp = vl_msg_api_alloc (msg_size); + memset (rmp, 0, msg_size); + rmp->_vl_msg_id = + ntohs (VL_API_MACIP_ACL_INTERFACE_GET_REPLY + am->msg_id_base); + rmp->context = mp->context; + rmp->count = htonl (count); + for (i = 0; i < count; i++) + { + rmp->acls[i] = htonl (am->macip_acl_by_sw_if_index[i]); + } + + vl_msg_api_send_shmem (q, (u8 *) & rmp); +} + + + +/* Set up the API message handling tables */ +static clib_error_t * +acl_plugin_api_hookup (vlib_main_t * vm) +{ + acl_main_t *sm = &acl_main; +#define _(N,n) \ + vl_msg_api_set_handlers((VL_API_##N + sm->msg_id_base), \ + #n, \ + vl_api_##n##_t_handler, \ + vl_noop_handler, \ + vl_api_##n##_t_endian, \ + vl_api_##n##_t_print, \ + sizeof(vl_api_##n##_t), 1); + foreach_acl_plugin_api_msg; +#undef _ + + return 0; +} + +#define vl_msg_name_crc_list +#include <acl/acl_all_api_h.h> +#undef vl_msg_name_crc_list + +static void +setup_message_id_table (acl_main_t * sm, api_main_t * am) +{ +#define _(id,n,crc) \ + vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id + sm->msg_id_base); + foreach_vl_msg_name_crc_acl; +#undef _ +} + +u32 +register_match_action_nexts (u32 next_in_ip4, u32 next_in_ip6, + u32 next_out_ip4, u32 next_out_ip6) +{ + acl_main_t *am = &acl_main; + u32 act = am->n_match_actions; + if (am->n_match_actions == 255) + { + return ~0; + } + am->n_match_actions++; + am->acl_in_ip4_match_next[act] = next_in_ip4; + am->acl_in_ip6_match_next[act] = next_in_ip6; + am->acl_out_ip4_match_next[act] = next_out_ip4; + am->acl_out_ip6_match_next[act] = next_out_ip6; + return act; +} + +void +acl_setup_nodes (void) +{ + vlib_main_t *vm = vlib_get_main (); + acl_main_t *am = &acl_main; + vlib_node_t *n; + + n = vlib_get_node_by_name (vm, (u8 *) "l2-input-classify"); + am->l2_input_classify_next_acl = + vlib_node_add_next_with_slot (vm, n->index, acl_in_node.index, ~0); + n = vlib_get_node_by_name (vm, (u8 *) "l2-output-classify"); + am->l2_output_classify_next_acl = + vlib_node_add_next_with_slot (vm, n->index, acl_out_node.index, ~0); + + feat_bitmap_init_next_nodes (vm, acl_in_node.index, L2INPUT_N_FEAT, + l2input_get_feat_names (), + am->acl_in_node_input_next_node_index); + + memset (&am->acl_in_ip4_match_next[0], 0, + sizeof (am->acl_in_ip4_match_next)); + memset (&am->acl_in_ip6_match_next[0], 0, + sizeof (am->acl_in_ip6_match_next)); + memset (&am->acl_out_ip4_match_next[0], 0, + sizeof (am->acl_out_ip4_match_next)); + memset (&am->acl_out_ip6_match_next[0], 0, + sizeof (am->acl_out_ip6_match_next)); + am->n_match_actions = 0; + + register_match_action_nexts (0, 0, 0, 0); /* drop */ + register_match_action_nexts (~0, ~0, ~0, ~0); /* permit */ + register_match_action_nexts (ACL_IN_L2S_INPUT_IP4_ADD, ACL_IN_L2S_INPUT_IP6_ADD, ACL_OUT_L2S_OUTPUT_IP4_ADD, ACL_OUT_L2S_OUTPUT_IP6_ADD); /* permit + create session */ +} + + + +static clib_error_t * +acl_init (vlib_main_t * vm) +{ + acl_main_t *am = &acl_main; + clib_error_t *error = 0; + memset (am, 0, sizeof (*am)); + am->vlib_main = vm; + am->vnet_main = vnet_get_main (); + + u8 *name = format (0, "acl_%08x%c", api_version, 0); + + /* Ask for a correctly-sized block of API message decode slots */ + am->msg_id_base = vl_msg_api_get_msg_ids ((char *) name, + VL_MSG_FIRST_AVAILABLE); + + error = acl_plugin_api_hookup (vm); + acl_setup_nodes (); + + /* Add our API messages to the global name_crc hash table */ + setup_message_id_table (am, &api_main); + + vec_free (name); + + return error; +} + +VLIB_INIT_FUNCTION (acl_init); |