ligang/vpp
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
288e8930ee7f1cf4980c06c167ef4e0cdf559528
vpp/plugins/acl-plugin/acl/acl.c
Juraj Sloboda 288e8930ee Make table chain deletion optional in classifier API (VPP-206) 
Change-Id: If30c0f6d5de34943bc399b3412c2d10847538c3c
Signed-off-by: Juraj Sloboda <jsloboda@cisco.com>
2016-12-07 09:42:18 +00:00

1884 lines
50 KiB
C
Raw Blame History

/*
* 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,
1 /* delete_chain */);
}
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,
1 /* delete_chain */);
}
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);
Reference in New Issue View Git Blame Copy Permalink