/*
* 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 <stddef.h>
#include <netinet/in.h>
#include <vlib/vlib.h>
#include <vnet/vnet.h>
#include <vnet/pg/pg.h>
#include <vppinfra/error.h>
#include <acl/acl.h>
#include "bihash_40_8.h"
#include <vppinfra/bihash_template.h>
#include <vppinfra/bihash_template.c>
#include "fa_node.h"
typedef struct
{
u32 next_index;
u32 sw_if_index;
u32 match_acl_in_index;
u32 match_rule_index;
u64 packet_info[6];
u32 trace_bitmap;
u8 action;
} acl_fa_trace_t;
/* packet trace format function */
static u8 *
format_acl_fa_trace (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
acl_fa_trace_t *t = va_arg (*args, acl_fa_trace_t *);
s =
format (s,
"acl-plugin: sw_if_index %d, next index %d, action: %d, match: acl %d rule %d trace_bits %08x\n"
" pkt info %016llx %016llx %016llx %016llx %016llx %016llx",
t->sw_if_index, t->next_index, t->action, t->match_acl_in_index,
t->match_rule_index, t->trace_bitmap,
t->packet_info[0], t->packet_info[1], t->packet_info[2],
t->packet_info[3], t->packet_info[4], t->packet_info[5]);
return s;
}
/* *INDENT-OFF* */
#define foreach_acl_fa_error \
_(ACL_DROP, "ACL deny packets") \
_(ACL_PERMIT, "ACL permit packets") \
_(ACL_NEW_SESSION, "new sessions added") \
_(ACL_EXIST_SESSION, "existing session packets") \
_(ACL_CHECK, "checked packets") \
_(ACL_RESTART_SESSION_TIMER, "restart session timer") \
_(ACL_TOO_MANY_SESSIONS, "too many sessions to add new") \
/* end of errors */
typedef enum
{
#define _(sym,str) ACL_FA_ERROR_##sym,
foreach_acl_fa_error
#undef _
ACL_FA_N_ERROR,
} acl_fa_error_t;
static char *acl_fa_error_strings[] = {
#define _(sym,string) string,
foreach_acl_fa_error
#undef _
};
/* *INDENT-ON* */
static void *
get_ptr_to_offset (vlib_buffer_t * b0, int offset)
{
u8 *p = vlib_buffer_get_current (b0) + offset;
return p;
}
static int
fa_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
fa_acl_match_port (u16 port, u16 port_first, u16 port_last, int is_ip6)
{
return ((port >= port_first) && (port <= port_last));
}
int
acl_match_5tuple (acl_main_t * am, u32 acl_index, fa_5tuple_t * pkt_5tuple,
int is_ip6, u8 * r_action, u32 * r_acl_match_p,
u32 * r_rule_match_p, u32 * trace_bitmap)
{
int i;
acl_list_t *a;
acl_rule_t *r;
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 (!fa_acl_match_addr
(&pkt_5tuple->addr[1], &r->dst, r->dst_prefixlen, is_ip6))
continue;
#ifdef FA_NODE_VERBOSE_DEBUG
clib_warning
("ACL_FA_NODE_DBG acl %d rule %d pkt dst addr %U match rule addr %U/%d",
acl_index, i, format_ip46_address, &pkt_5tuple->addr[1],
IP46_TYPE_ANY, format_ip46_address, &r->dst, IP46_TYPE_ANY,
r->dst_prefixlen);
#endif
if (!fa_acl_match_addr
(&pkt_5tuple->addr[0], &r->src, r->src_prefixlen, is_ip6))
continue;
#ifdef FA_NODE_VERBOSE_DEBUG
clib_warning
("ACL_FA_NODE_DBG acl %d rule %d pkt src addr %U match rule addr %U/%d",
acl_index, i, format_ip46_address, &pkt_5tuple->addr[0],
IP46_TYPE_ANY, format_ip46_address, &r->src, IP46_TYPE_ANY,
r->src_prefixlen);
clib_warning
("ACL_FA_NODE_DBG acl %d rule %d trying to match pkt proto %d with rule %d",
acl_index, i, pkt_5tuple->l4.proto, r->proto);
#endif
if (r->proto)
{
if (pkt_5tuple->l4.proto != r->proto)
continue;
if (PREDICT_FALSE (pkt_5tuple->pkt.is_nonfirst_fragment &&
am->l4_match_nonfirst_fragment))
{
/* non-initial fragment with frag match configured - match this rule */
*trace_bitmap |= 0x80000000;
*r_action = r->is_permit;
if (r_acl_match_p)
*r_acl_match_p = acl_index;
if (r_rule_match_p)
*r_rule_match_p = i;
return 1;
}
/* A sanity check just to ensure we are about to match the ports extracted from the packet */
if (PREDICT_FALSE (!pkt_5tuple->pkt.l4_valid))
continue;
#ifdef FA_NODE_VERBOSE_DEBUG
clib_warning
("ACL_FA_NODE_DBG acl %d rule %d pkt proto %d match rule %d",
acl_index, i, pkt_5tuple->l4.proto, r->proto);
#endif
if (!fa_acl_match_port
(pkt_5tuple->l4.port[0], r->src_port_or_type_first,
r->src_port_or_type_last, is_ip6))
continue;
#ifdef FA_NODE_VERBOSE_DEBUG
clib_warning
("ACL_FA_NODE_DBG acl %d rule %d pkt sport %d match rule [%d..%d]",
acl_index, i, pkt_5tuple->l4.port[0], r->src_port_or_type_first,
r->src_port_or_type_last);
#endif
if (!fa_acl_match_port
(pkt_5tuple->l4.port[1], r->dst_port_or_code_first,
r->dst_port_or_code_last, is_ip6))
continue;
#ifdef FA_NODE_VERBOSE_DEBUG
clib_warning
("ACL_FA_NODE_DBG acl %d rule %d pkt dport %d match rule [%d..%d]",
acl_index, i, pkt_5tuple->l4.port[1], r->dst_port_or_code_first,
r->dst_port_or_code_last);
#endif
if (pkt_5tuple->pkt.tcp_flags_valid
&& ((pkt_5tuple->pkt.tcp_flags & r->tcp_flags_mask) !=
r->tcp_flags_value))
continue;
}
/* everything matches! */
#ifdef FA_NODE_VERBOSE_DEBUG
clib_warning ("ACL_FA_NODE_DBG acl %d rule %d FULL-MATCH, action %d",
acl_index, i, r->is_permit);
#endif
*r_action = r->is_permit;
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;
}
static u8
full_acl_match_5tuple (u32 sw_if_index, fa_5tuple_t * pkt_5tuple, int is_l2,
int is_ip6, int is_input, u32 * acl_match_p,
u32 * rule_match_p, u32 * trace_bitmap)
{
acl_main_t *am = &acl_main;
int i;
u32 *acl_vector;
u8 action = 0;
if (is_input)
{
vec_validate (am->input_acl_vec_by_sw_if_index, sw_if_index);
acl_vector = am->input_acl_vec_by_sw_if_index[sw_if_index];
}
else
{
vec_validate (am->output_acl_vec_by_sw_if_index, sw_if_index);
acl_vector = am->output_acl_vec_by_sw_if_index[sw_if_index];
}
for (i = 0; i < vec_len (acl_vector); i++)
{
#ifdef FA_NODE_VERBOSE_DEBUG
clib_warning ("ACL_FA_NODE_DBG: Trying to match ACL: %d",
acl_vector[i]);
#endif
if (acl_match_5tuple
(am, acl_vector[i], pkt_5tuple, is_ip6, &action,
acl_match_p, rule_match_p, trace_bitmap))
{
return action;
}
}
if (vec_len (acl_vector) > 0)
{
/* If there are ACLs and none matched, deny by default */
return 0;
}
#ifdef FA_NODE_VERBOSE_DEBUG
clib_warning ("ACL_FA_NODE_DBG: No ACL on sw_if_index %d", sw_if_index);
#endif
/* Deny by default. If there are no ACLs defined we should not be here. */
return 0;
}
static int
offset_within_packet (vlib_buffer_t * b0, int offset)
{
/* For the purposes of this code, "within" means we have at least 8 bytes after it */
return (offset <= (b0->current_length - 8));
}
static void
acl_fill_5tuple (acl_main_t * am, vlib_buffer_t * b0, int is_ip6,
int is_input, int is_l2_path, fa_5tuple_t * p5tuple_pkt)
{
int l3_offset = 14;
int l4_offset;
u16 ports[2];
u16 proto;
/* IP4 and IP6 protocol numbers of ICMP */
static u8 icmp_protos[] = { IP_PROTOCOL_ICMP, IP_PROTOCOL_ICMP6 };
if (is_input && !(is_l2_path))
{
l3_offset = 0;
}
/* key[0..3] contains src/dst address and is cleared/set below */
/* Remainder of the key and per-packet non-key data */
p5tuple_pkt->kv.key[4] = 0;
p5tuple_pkt->kv.value = 0;
if (is_ip6)
{
clib_memcpy (&p5tuple_pkt->addr,
get_ptr_to_offset (b0,
offsetof (ip6_header_t,
src_address) + l3_offset),
sizeof (p5tuple_pkt->addr));
proto =
*(u8 *) get_ptr_to_offset (b0,
offsetof (ip6_header_t,
protocol) + l3_offset);
l4_offset = l3_offset + sizeof (ip6_header_t);
#ifdef FA_NODE_VERBOSE_DEBUG
clib_warning ("ACL_FA_NODE_DBG: proto: %d, l4_offset: %d", proto,
l4_offset);
#endif
/* IP6 EH handling is here, increment l4_offset if needs to, update the proto */
int need_skip_eh = clib_bitmap_get (am->fa_ipv6_known_eh_bitmap, proto);
if (PREDICT_FALSE (need_skip_eh))
{
while (need_skip_eh && offset_within_packet (b0, l4_offset))
{
/* Fragment header needs special handling */
if (PREDICT_FALSE(ACL_EH_FRAGMENT == proto))
{
proto = *(u8 *) get_ptr_to_offset (b0, l4_offset);
u16 frag_offset;
clib_memcpy (&frag_offset, get_ptr_to_offset (b0, 2 + l4_offset), sizeof(frag_offset));
frag_offset = ntohs(frag_offset) >> 3;
if (frag_offset)
{
p5tuple_pkt->pkt.is_nonfirst_fragment = 1;
/* invalidate L4 offset so we don't try to find L4 info */
l4_offset += b0->current_length;
}
else
{
/* First fragment: skip the frag header and move on. */
l4_offset += 8;
}
}
else
{
u8 nwords = *(u8 *) get_ptr_to_offset (b0, 1 + l4_offset);
proto = *(u8 *) get_ptr_to_offset (b0, l4_offset);
l4_offset += 8 * (1 + (u16) nwords);
}
#ifdef FA_NODE_VERBOSE_DEBUG
clib_warning ("ACL_FA_NODE_DBG: new proto: %d, new offset: %d",
proto, l4_offset);
#endif
need_skip_eh =
clib_bitmap_get (am->fa_ipv6_known_eh_bitmap, proto);
}
}
}
else
{
p5tuple_pkt->kv.key[0] = 0;
p5tuple_pkt->kv.key[1] = 0;
p5tuple_pkt->kv.key[2] = 0;
p5tuple_pkt->kv.key[3] = 0;
clib_memcpy (&p5tuple_pkt->addr[0].ip4,
get_ptr_to_offset (b0,
offsetof (ip4_header_t,
src_address) + l3_offset),
sizeof (p5tuple_pkt->addr[0].ip4));
clib_memcpy (&p5tuple_pkt->addr[1].ip4,
get_ptr_to_offset (b0,
offsetof (ip4_header_t,
dst_address) + l3_offset),
sizeof (p5tuple_pkt->addr[1].ip4));
proto =
*(u8 *) get_ptr_to_offset (b0,
offsetof (ip4_header_t,
protocol) + l3_offset);
l4_offset = l3_offset + sizeof (ip4_header_t);
u16 flags_and_fragment_offset;
clib_memcpy (&flags_and_fragment_offset,
get_ptr_to_offset (b0,
offsetof (ip4_header_t,
flags_and_fragment_offset)) + l3_offset,
sizeof(flags_and_fragment_offset));
flags_and_fragment_offset = ntohs (flags_and_fragment_offset);
/* non-initial fragments have non-zero offset */
if ((PREDICT_FALSE(0xfff & flags_and_fragment_offset)))
{
p5tuple_pkt->pkt.is_nonfirst_fragment = 1;
/* invalidate L4 offset so we don't try to find L4 info */
l4_offset += b0->current_length;
}
}
p5tuple_pkt->l4.proto = proto;
if (PREDICT_TRUE (offset_within_packet (b0, l4_offset)))
{
p5tuple_pkt->pkt.l4_valid = 1;
if (icmp_protos[is_ip6] == proto)
{
/* type */
p5tuple_pkt->l4.port[0] =
*(u8 *) get_ptr_to_offset (b0,
l4_offset + offsetof (icmp46_header_t,
type));
/* code */
p5tuple_pkt->l4.port[1] =
*(u8 *) get_ptr_to_offset (b0,
l4_offset + offsetof (icmp46_header_t,
code));
}
else if ((IPPROTO_TCP == proto) || (IPPROTO_UDP == proto))
{
clib_memcpy (&ports,
get_ptr_to_offset (b0,
l4_offset + offsetof (tcp_header_t,
src_port)),
sizeof (ports));
p5tuple_pkt->l4.port[0] = ntohs (ports[0]);
p5tuple_pkt->l4.port[1] = ntohs (ports[1]);
p5tuple_pkt->pkt.tcp_flags =
*(u8 *) get_ptr_to_offset (b0,
l4_offset + offsetof (tcp_header_t,
flags));
p5tuple_pkt->pkt.tcp_flags_valid = (proto == IPPROTO_TCP);
}
/*
* FIXME: rather than the above conditional, here could
* be a nice generic mechanism to extract two L4 values:
*
* have a per-protocol array of 4 elements like this:
* u8 offset; to take the byte from, off L4 header
* u8 mask; to mask it with, before storing
*
* this way we can describe UDP, TCP and ICMP[46] semantics,
* and add a sort of FPM-type behavior for other protocols.
*
* Of course, is it faster ? and is it needed ?
*
*/
}
}
/* Session keys match the packets received, and mirror the packets sent */
static void
acl_make_5tuple_session_key (int is_input, fa_5tuple_t * p5tuple_pkt,
fa_5tuple_t * p5tuple_sess)
{
int src_index = is_input ? 0 : 1;
int dst_index = is_input ? 1 : 0;
p5tuple_sess->addr[src_index] = p5tuple_pkt->addr[0];
p5tuple_sess->addr[dst_index] = p5tuple_pkt->addr[1];
p5tuple_sess->l4.as_u64 = p5tuple_pkt->l4.as_u64;
p5tuple_sess->l4.port[src_index] = p5tuple_pkt->l4.port[0];
p5tuple_sess->l4.port[dst_index] = p5tuple_pkt->l4.port[1];
}
static int
acl_fa_ifc_has_sessions (acl_main_t * am, int sw_if_index0)
{
int has_sessions =
clib_bitmap_get (am->fa_sessions_on_sw_if_index, sw_if_index0);
return has_sessions;
}
static int
acl_fa_ifc_has_in_acl (acl_main_t * am, int sw_if_index0)
{
int it_has = clib_bitmap_get (am->fa_in_acl_on_sw_if_index, sw_if_index0);
return it_has;
}
static int
acl_fa_ifc_has_out_acl (acl_main_t * am, int sw_if_index0)
{
int it_has = clib_bitmap_get (am->fa_out_acl_on_sw_if_index, sw_if_index0);
return it_has;
}
static int
fa_session_get_timeout_type (acl_main_t * am, fa_session_t * sess)
{
/* seen both SYNs and ACKs but not FINs means we are in establshed state */
u16 masked_flags =
sess->tcp_flags_seen.as_u16 & ((TCP_FLAGS_RSTFINACKSYN << 8) +
TCP_FLAGS_RSTFINACKSYN);
switch (sess->info.l4.proto)
{
case IPPROTO_TCP:
if (((TCP_FLAGS_ACKSYN << 8) + TCP_FLAGS_ACKSYN) == masked_flags)
{
return ACL_TIMEOUT_TCP_IDLE;
}
else
{
return ACL_TIMEOUT_TCP_TRANSIENT;
}
break;
case IPPROTO_UDP:
return ACL_TIMEOUT_UDP_IDLE;
break;
default:
return ACL_TIMEOUT_UDP_IDLE;
}
}
static u64
fa_session_get_timeout (acl_main_t * am, fa_session_t * sess)
{
u64 timeout = am->vlib_main->clib_time.clocks_per_second;
int timeout_type = fa_session_get_timeout_type (am, sess);
timeout *= am->session_timeout_sec[timeout_type];
return timeout;
}
static void
acl_fa_ifc_init_sessions (acl_main_t * am, int sw_if_index0)
{
#ifdef FA_NODE_VERBOSE_DEBUG
clib_warning
("Initializing bihash for sw_if_index %d num buckets %lu memory size %llu",
sw_if_index0, am->fa_conn_table_hash_num_buckets,
am->fa_conn_table_hash_memory_size);
#endif
vec_validate (am->fa_sessions_by_sw_if_index, sw_if_index0);
BV (clib_bihash_init) (&am->fa_sessions_by_sw_if_index
[sw_if_index0], "ACL plugin FA session bihash",
am->fa_conn_table_hash_num_buckets,
am->fa_conn_table_hash_memory_size);
am->fa_sessions_on_sw_if_index =
clib_bitmap_set (am->fa_sessions_on_sw_if_index, sw_if_index0, 1);
}
static void
acl_fa_conn_list_add_session (acl_main_t * am, u32 sess_id)
{
fa_session_t *sess = am->fa_sessions_pool + sess_id;
u8 list_id = fa_session_get_timeout_type(am, sess);
sess->link_list_id = list_id;
sess->link_next_idx = ~0;
sess->link_prev_idx = am->fa_conn_list_tail[list_id];
if (~0 != am->fa_conn_list_tail[list_id]) {
fa_session_t *prev_sess = am->fa_sessions_pool + am->fa_conn_list_tail[list_id];
prev_sess->link_next_idx = sess_id;
}
am->fa_conn_list_tail[list_id] = sess_id;
if (~0 == am->fa_conn_list_head[list_id]) {
am->fa_conn_list_head[list_id] = sess_id;
/* If it is a first conn in any list, kick off the cleaner */
vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index,
ACL_FA_CLEANER_RESCHEDULE, 0);
}
}
static void
acl_fa_conn_list_delete_session (acl_main_t *am, u32 sess_id)
{
fa_session_t *sess = am->fa_sessions_pool + sess_id;
if (~0 != sess->link_prev_idx) {
fa_session_t *prev_sess = am->fa_sessions_pool + sess->link_prev_idx;
prev_sess->link_next_idx = sess->link_next_idx;
if (prev_sess->link_list_id != sess->link_list_id)
clib_warning("(prev_sess->link_list_id != sess->link_list_id)");
}
if (~0 != sess->link_next_idx) {
fa_session_t *next_sess = am->fa_sessions_pool + sess->link_next_idx;
next_sess->link_prev_idx = sess->link_prev_idx;
if (next_sess->link_list_id != sess->link_list_id)
clib_warning("(next_sess->link_list_id != sess->link_list_id)");
}
if (am->fa_conn_list_head[sess->link_list_id] == sess_id) {
am->fa_conn_list_head[sess->link_list_id] = sess->link_next_idx;
}
if (am->fa_conn_list_tail[sess->link_list_id] == sess_id) {
am->fa_conn_list_tail[sess->link_list_id] = sess->link_prev_idx;
}
}
int
acl_fa_session_is_dead (acl_main_t * am, u32 sw_if_index, u64 now,
u32 sess_id)
{
return 0;
}
static void
acl_fa_restart_timer_for_session (acl_main_t * am, u64 now, u32 sess_id)
{
// fa_session_t *sess = am->fa_sessions_pool + sess_id;
acl_fa_conn_list_delete_session(am, sess_id);
acl_fa_conn_list_add_session(am, sess_id);
}
static u8
acl_fa_track_session (acl_main_t * am, int is_input, u32 sw_if_index, u64 now,
fa_session_t * sess, fa_5tuple_t * pkt_5tuple)
{
sess->last_active_time = now;
if (pkt_5tuple->pkt.tcp_flags_valid)
{
sess->tcp_flags_seen.as_u8[is_input] |= pkt_5tuple->pkt.tcp_flags;
}
return 3;
}
static void
acl_fa_delete_session (acl_main_t * am, u32 sw_if_index, u32 sess_id)
{
fa_session_t *sess = (fa_session_t *) am->fa_sessions_pool + sess_id;
BV (clib_bihash_add_del) (&am->fa_sessions_by_sw_if_index[sw_if_index],
&sess->info.kv, 0);
pool_put_index (am->fa_sessions_pool, sess_id);
/* Deleting from timer wheel not needed, as the cleaner deals with the timers. */
vec_validate (am->fa_session_dels_by_sw_if_index, sw_if_index);
am->fa_session_dels_by_sw_if_index[sw_if_index]++;
}
static int
acl_fa_can_add_session (acl_main_t * am, int is_input, u32 sw_if_index)
{
u64 curr_sess;
vec_validate (am->fa_session_adds_by_sw_if_index, sw_if_index);
vec_validate (am->fa_session_dels_by_sw_if_index, sw_if_index);
curr_sess =
am->fa_session_adds_by_sw_if_index[sw_if_index] -
am->fa_session_dels_by_sw_if_index[sw_if_index];
return (curr_sess < am->fa_conn_table_max_entries);
}
always_inline void
acl_fa_try_recycle_session (acl_main_t * am, int is_input, u32 sw_if_index)
{
/* try to recycle a TCP transient session */
u8 timeout_type = ACL_TIMEOUT_TCP_TRANSIENT;
u32 sess_id = am->fa_conn_list_head[timeout_type];
if (~0 != sess_id) {
acl_fa_conn_list_delete_session(am, sess_id);
acl_fa_delete_session(am, sw_if_index, sess_id);
}
}
static void
acl_fa_add_session (acl_main_t * am, int is_input, u32 sw_if_index, u64 now,
fa_5tuple_t * p5tuple)
{
clib_bihash_kv_40_8_t *pkv = &p5tuple->kv;
clib_bihash_kv_40_8_t kv;
u32 sess_id;
fa_session_t *sess;
pool_get (am->fa_sessions_pool, sess);
sess_id = sess - am->fa_sessions_pool;
kv.key[0] = pkv->key[0];
kv.key[1] = pkv->key[1];
kv.key[2] = pkv->key[2];
kv.key[3] = pkv->key[3];
kv.key[4] = pkv->key[4];
kv.value = sess_id;
memcpy (sess, pkv, sizeof (pkv->key));
sess->last_active_time = now;
sess->sw_if_index = sw_if_index;
sess->tcp_flags_seen.as_u16 = 0;
sess->reserved1 = 0;
sess->link_list_id = ~0;
sess->link_prev_idx = ~0;
sess->link_next_idx = ~0;
if (!acl_fa_ifc_has_sessions (am, sw_if_index))
{
acl_fa_ifc_init_sessions (am, sw_if_index);
}
BV (clib_bihash_add_del) (&am->fa_sessions_by_sw_if_index[sw_if_index],
&kv, 1);
acl_fa_conn_list_add_session(am, sess_id);
vec_validate (am->fa_session_adds_by_sw_if_index, sw_if_index);
am->fa_session_adds_by_sw_if_index[sw_if_index]++;
}
static int
acl_fa_find_session (acl_main_t * am, u32 sw_if_index0, fa_5tuple_t * p5tuple,
clib_bihash_kv_40_8_t * pvalue_sess)
{
return (BV (clib_bihash_search)
(&am->fa_sessions_by_sw_if_index[sw_if_index0], &p5tuple->kv,
pvalue_sess) == 0);
}
always_inline uword
acl_fa_node_fn (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame, int is_ip6,
int is_input, int is_l2_path, u32 * l2_feat_next_node_index,
vlib_node_registration_t * acl_fa_node)
{
u32 n_left_from, *from, *to_next;
acl_fa_next_t next_index;
u32 pkts_acl_checked = 0;
u32 pkts_new_session = 0;
u32 pkts_exist_session = 0;
u32 pkts_acl_permit = 0;
u32 pkts_restart_session_timer = 0;
u32 trace_bitmap = 0;
u32 feature_bitmap0;
acl_main_t *am = &acl_main;
fa_5tuple_t fa_5tuple, kv_sess;
clib_bihash_kv_40_8_t value_sess;
vlib_node_runtime_t *error_node;
u64 now = clib_cpu_time_now ();
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
error_node = vlib_node_get_runtime (vm, acl_fa_node->index);
while (n_left_from > 0)
{
u32 n_left_to_next;
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
u32 bi0;
vlib_buffer_t *b0;
u32 next0 = 0;
u8 action = 0;
u32 sw_if_index0;
int acl_check_needed = 1;
u32 match_acl_in_index = ~0;
u32 match_rule_index = ~0;
u8 error0 = 0;
/* speculatively enqueue b0 to the current next frame */
bi0 = from[0];
to_next[0] = bi0;
from += 1;
to_next += 1;
n_left_from -= 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
if (is_input)
sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
else
sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
if (is_l2_path)
feature_bitmap0 = vnet_buffer (b0)->l2.feature_bitmap;
/*
* Extract the L3/L4 matching info into a 5-tuple structure,
* then create a session key whose layout is independent on forward or reverse
* direction of the packet.
*/
acl_fill_5tuple (am, b0, is_ip6, is_input, is_l2_path, &fa_5tuple);
acl_make_5tuple_session_key (is_input, &fa_5tuple, &kv_sess);
#ifdef FA_NODE_VERBOSE_DEBUG
clib_warning
("ACL_FA_NODE_DBG: session 5-tuple %016llx %016llx %016llx %016llx %016llx : %016llx",
kv_sess.kv.key[0], kv_sess.kv.key[1], kv_sess.kv.key[2],
kv_sess.kv.key[3], kv_sess.kv.key[4], kv_sess.kv.value);
clib_warning
("ACL_FA_NODE_DBG: packet 5-tuple %016llx %016llx %016llx %016llx %016llx : %016llx",
fa_5tuple.kv.key[0], fa_5tuple.kv.key[1], fa_5tuple.kv.key[2],
fa_5tuple.kv.key[3], fa_5tuple.kv.key[4], fa_5tuple.kv.value);
#endif
/* Try to match an existing session first */
if (acl_fa_ifc_has_sessions (am, sw_if_index0))
{
if (acl_fa_find_session
(am, sw_if_index0, &kv_sess, &value_sess))
{
trace_bitmap |= 0x80000000;
error0 = ACL_FA_ERROR_ACL_EXIST_SESSION;
// FIXME assert(value_sess.value == (0xffffffff & value_sess.value));
u32 sess_id = value_sess.value;
fa_session_t *sess = am->fa_sessions_pool + sess_id;
int old_timeout_type =
fa_session_get_timeout_type (am, sess);
action =
acl_fa_track_session (am, is_input, sw_if_index0, now,
sess, &fa_5tuple);
/* expose the session id to the tracer */
match_rule_index = sess_id;
int new_timeout_type =
fa_session_get_timeout_type (am, sess);
acl_check_needed = 0;
pkts_exist_session += 1;
/* Tracking might have changed the session timeout type, e.g. from transient to established */
if (PREDICT_FALSE (old_timeout_type != new_timeout_type))
{
acl_fa_restart_timer_for_session (am, now, sess_id);
pkts_restart_session_timer++;
trace_bitmap |=
0x00010000 + ((0xff & old_timeout_type) << 8) +
(0xff & new_timeout_type);
}
}
}
if (acl_check_needed)
{
action =
full_acl_match_5tuple (sw_if_index0, &fa_5tuple, is_l2_path,
is_ip6, is_input, &match_acl_in_index,
&match_rule_index, &trace_bitmap);
error0 = action;
if (1 == action)
pkts_acl_permit += 1;
if (2 == action)
{
if (!acl_fa_can_add_session (am, is_input, sw_if_index0))
acl_fa_try_recycle_session (am, is_input, sw_if_index0);
if (acl_fa_can_add_session (am, is_input, sw_if_index0))
{
acl_fa_add_session (am, is_input, sw_if_index0, now,
&kv_sess);
pkts_new_session += 1;
}
else
{
action = 0;
error0 = ACL_FA_ERROR_ACL_TOO_MANY_SESSIONS;
}
}
}
if (action > 0)
{
if (is_l2_path)
next0 =
feat_bitmap_get_next_node_index (l2_feat_next_node_index,
feature_bitmap0);
else
vnet_feature_next (sw_if_index0, &next0, b0);
}
if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
&& (b0->flags & VLIB_BUFFER_IS_TRACED)))
{
acl_fa_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
t->sw_if_index = sw_if_index0;
t->next_index = next0;
t->match_acl_in_index = match_acl_in_index;
t->match_rule_index = match_rule_index;
t->packet_info[0] = fa_5tuple.kv.key[0];
t->packet_info[1] = fa_5tuple.kv.key[1];
t->packet_info[2] = fa_5tuple.kv.key[2];
t->packet_info[3] = fa_5tuple.kv.key[3];
t->packet_info[4] = fa_5tuple.kv.key[4];
t->packet_info[5] = fa_5tuple.kv.value;
t->action = action;
t->trace_bitmap = trace_bitmap;
}
next0 = next0 < node->n_next_nodes ? next0 : 0;
if (0 == next0)
b0->error = error_node->errors[error0];
pkts_acl_checked += 1;
/* verify speculative enqueue, maybe switch current next frame */
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next, bi0,
next0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
vlib_node_increment_counter (vm, acl_fa_node->index,
ACL_FA_ERROR_ACL_CHECK, pkts_acl_checked);
vlib_node_increment_counter (vm, acl_fa_node->index,
ACL_FA_ERROR_ACL_PERMIT, pkts_acl_permit);
vlib_node_increment_counter (vm, acl_fa_node->index,
ACL_FA_ERROR_ACL_NEW_SESSION,
pkts_new_session);
vlib_node_increment_counter (vm, acl_fa_node->index,
ACL_FA_ERROR_ACL_EXIST_SESSION,
pkts_exist_session);
vlib_node_increment_counter (vm, acl_fa_node->index,
ACL_FA_ERROR_ACL_RESTART_SESSION_TIMER,
pkts_restart_session_timer);
return frame->n_vectors;
}
vlib_node_registration_t acl_in_l2_ip6_node;
static uword
acl_in_ip6_l2_node_fn (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
acl_main_t *am = &acl_main;
return acl_fa_node_fn (vm, node, frame, 1, 1, 1,
am->fa_acl_in_ip6_l2_node_feat_next_node_index,
&acl_in_l2_ip6_node);
}
vlib_node_registration_t acl_in_l2_ip4_node;
static uword
acl_in_ip4_l2_node_fn (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
acl_main_t *am = &acl_main;
return acl_fa_node_fn (vm, node, frame, 0, 1, 1,
am->fa_acl_in_ip4_l2_node_feat_next_node_index,
&acl_in_l2_ip4_node);
}
vlib_node_registration_t acl_out_l2_ip6_node;
static uword
acl_out_ip6_l2_node_fn (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
acl_main_t *am = &acl_main;
return acl_fa_node_fn (vm, node, frame, 1, 0, 1,
am->fa_acl_out_ip6_l2_node_feat_next_node_index,
&acl_out_l2_ip6_node);
}
vlib_node_registration_t acl_out_l2_ip4_node;
static uword
acl_out_ip4_l2_node_fn (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
acl_main_t *am = &acl_main;
return acl_fa_node_fn (vm, node, frame, 0, 0, 1,
am->fa_acl_out_ip4_l2_node_feat_next_node_index,
&acl_out_l2_ip4_node);
}
/**** L3 processing path nodes ****/
vlib_node_registration_t acl_in_fa_ip6_node;
static uword
acl_in_ip6_fa_node_fn (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
return acl_fa_node_fn (vm, node, frame, 1, 1, 0, 0, &acl_in_fa_ip6_node);
}
vlib_node_registration_t acl_in_fa_ip4_node;
static uword
acl_in_ip4_fa_node_fn (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
return acl_fa_node_fn (vm, node, frame, 0, 1, 0, 0, &acl_in_fa_ip4_node);
}
vlib_node_registration_t acl_out_fa_ip6_node;
static uword
acl_out_ip6_fa_node_fn (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
return acl_fa_node_fn (vm, node, frame, 1, 0, 0, 0, &acl_out_fa_ip6_node);
}
vlib_node_registration_t acl_out_fa_ip4_node;
static uword
acl_out_ip4_fa_node_fn (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
return acl_fa_node_fn (vm, node, frame, 0, 0, 0, 0, &acl_out_fa_ip4_node);
}
/*
* This process performs all the connection clean up - both for idle connections,
* as well as receiving the signals to clean up the connections in case of sw_if_index deletion,
* or (maybe in the future) the connection deletion due to policy reasons.
*
* The previous iteration (l2sess) attempted to clean up the connections in small increments,
* in-band, but the problem it tried to preemptively address (process starvation) is yet to be seen.
*
* The approach with a single thread deleting the connections is simpler, thus we use it until
* there is a real starvation problem to solve.
*
*/
/* *INDENT-OFF* */
#define foreach_acl_fa_cleaner_error \
_(UNKNOWN_EVENT, "unknown event received") \
/* end of errors */
typedef enum
{
#define _(sym,str) ACL_FA_CLEANER_ERROR_##sym,
foreach_acl_fa_cleaner_error
#undef _
ACL_FA_CLEANER_N_ERROR,
} acl_fa_cleaner_error_t;
static char *acl_fa_cleaner_error_strings[] = {
#define _(sym,string) string,
foreach_acl_fa_cleaner_error
#undef _
};
static int
acl_fa_clean_sessions_by_sw_if_index (acl_main_t *am, u32 sw_if_index, u32 *count)
{
int undeleted = 0;
fa_session_t *sess;
uword *dv = NULL;
uword *ii;
pool_foreach(sess, am->fa_sessions_pool, ({
if ( (~0 == sw_if_index) || (sw_if_index == sess->sw_if_index) )
vec_add1(dv, sess-am->fa_sessions_pool);
}));
vec_foreach(ii, dv)
{
sess = pool_elt_at_index(am->fa_sessions_pool, *ii);
acl_fa_delete_session(am, sess->sw_if_index, *ii);
(*count)++;
}
pool_foreach(sess, am->fa_sessions_pool, ({
if ( (~0 == sw_if_index) || (sw_if_index == sess->sw_if_index) )
undeleted++;
}));
if (undeleted == 0)
{
if (~0 == sw_if_index)
{
/* FIXME: clean-up tables ? */
}
else
{
/* FIXME: clean-up tables ? */
}
}
return (undeleted == 0);
}
/* *INDENT-ON* */
static vlib_node_registration_t acl_fa_session_cleaner_process_node;
static int
acl_fa_conn_has_timed_out (acl_main_t *am, u64 now, u32 session_index)
{
fa_session_t *sess = am->fa_sessions_pool + session_index;
u64 sess_timeout_time =
sess->last_active_time + fa_session_get_timeout (am, sess);
return (sess_timeout_time < now);
}
static uword
acl_fa_session_cleaner_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
vlib_frame_t * f)
{
acl_main_t *am = &acl_main;
u64 now = clib_cpu_time_now ();
f64 cpu_cps = vm->clib_time.clocks_per_second;
u64 next_expire;
/* We should call timer wheel at least twice a second */
u64 max_timer_wait_interval = cpu_cps / 2;
am->fa_current_cleaner_timer_wait_interval = max_timer_wait_interval;
u32 *expired = NULL;
uword event_type, *event_data = 0;
am->fa_cleaner_node_index = acl_fa_session_cleaner_process_node.index;
while (1)
{
u32 count_deleted_sessions = 0;
u32 count_already_deleted = 0;
now = clib_cpu_time_now ();
next_expire = now + am->fa_current_cleaner_timer_wait_interval;
int has_pending_conns = 0;
u8 tt;
for(tt = 0; tt < ACL_N_TIMEOUTS; tt++)
{
if (~0 != am->fa_conn_list_head[tt])
has_pending_conns = 1;
}
/* If no pending connections then no point in timing out */
if (!has_pending_conns)
{
am->fa_cleaner_cnt_wait_without_timeout++;
(void) vlib_process_wait_for_event (vm);
event_type = vlib_process_get_events (vm, &event_data);
}
else
{
f64 timeout = ((i64) next_expire - (i64) now) / cpu_cps;
if (timeout <= 0)
{
/* skip waiting altogether */
event_type = ~0;
}
else
{
/* Timing wheel code is happier if it is called regularly */
if (timeout > 0.5)
timeout = 0.5;
am->fa_cleaner_cnt_wait_with_timeout++;
(void) vlib_process_wait_for_event_or_clock (vm, timeout);
event_type = vlib_process_get_events (vm, &event_data);
}
}
now = clib_cpu_time_now ();
switch (event_type)
{
case ~0:
/* nothing to do */
break;
case ACL_FA_CLEANER_RESCHEDULE:
/* Nothing to do. */
break;
case ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX:
{
uword *sw_if_index0;
vec_foreach (sw_if_index0, event_data)
{
am->fa_cleaner_cnt_delete_by_sw_index++;
#ifdef FA_NODE_VERBOSE_DEBUG
clib_warning
("ACL_FA_NODE_CLEAN: ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX: %d",
*sw_if_index0);
#endif
u32 count = 0;
int result =
acl_fa_clean_sessions_by_sw_if_index (am, *sw_if_index0,
&count);
count_deleted_sessions += count;
am->fa_cleaner_cnt_delete_by_sw_index_ok += result;
}
}
break;
default:
#ifdef FA_NODE_VERBOSE_DEBUG
clib_warning ("ACL plugin connection cleaner: unknown event %u",
event_type);
#endif
vlib_node_increment_counter (vm,
acl_fa_session_cleaner_process_node.
index,
ACL_FA_CLEANER_ERROR_UNKNOWN_EVENT, 1);
am->fa_cleaner_cnt_unknown_event++;
break;
}
{
u8 tt = 0;
for(tt = 0; tt < ACL_N_TIMEOUTS; tt++) {
while((vec_len(expired) < 2*am->fa_max_deleted_sessions_per_interval)
&& (~0 != am->fa_conn_list_head[tt])
&& (acl_fa_conn_has_timed_out(am, now,
am->fa_conn_list_head[tt]))) {
u32 sess_id = am->fa_conn_list_head[tt];
vec_add1(expired, sess_id);
acl_fa_conn_list_delete_session(am, sess_id);
}
}
}
u32 *psid = NULL;
vec_foreach (psid, expired)
{
u32 session_index = *psid;
if (!pool_is_free_index (am->fa_sessions_pool, session_index))
{
fa_session_t *sess = am->fa_sessions_pool + session_index;
u32 sw_if_index = sess->sw_if_index;
u64 sess_timeout_time =
sess->last_active_time + fa_session_get_timeout (am, sess);
if (now < sess_timeout_time)
{
/* clib_warning ("ACL_FA_NODE_CLEAN: Restarting timer for session %d",
(int) session_index); */
/* There was activity on the session, so the idle timeout
has not passed. Enqueue for another time period. */
acl_fa_conn_list_add_session(am, session_index);
/* FIXME: When/if moving to timer wheel,
pretend we did this in the past,
at last_active moment, so the timer is accurate */
am->fa_cleaner_cnt_timer_restarted++;
}
else
{
/* clib_warning ("ACL_FA_NODE_CLEAN: Deleting session %d",
(int) session_index); */
acl_fa_delete_session (am, sw_if_index, session_index);
count_deleted_sessions++;
}
}
else
{
count_already_deleted++;
}
}
if (expired)
_vec_len (expired) = 0;
if (event_data)
_vec_len (event_data) = 0;
if (count_deleted_sessions > am->fa_max_deleted_sessions_per_interval) {
/* if there was too many sessions to delete, do less waiting around next time */
am->fa_current_cleaner_timer_wait_interval /= 2;
} else if (count_deleted_sessions < am->fa_min_deleted_sessions_per_interval) {
/* Too few deleted sessions, slowly increase the amount of sleep up to a limit */
if (am->fa_current_cleaner_timer_wait_interval < max_timer_wait_interval)
am->fa_current_cleaner_timer_wait_interval += cpu_cps * am->fa_cleaner_wait_time_increment;
}
am->fa_cleaner_cnt_event_cycles++;
am->fa_cleaner_cnt_deleted_sessions += count_deleted_sessions;
am->fa_cleaner_cnt_already_deleted += count_already_deleted;
}
/* NOT REACHED */
return 0;
}
void
acl_fa_enable_disable (u32 sw_if_index, int is_input, int enable_disable)
{
acl_main_t *am = &acl_main;
if (is_input)
{
vnet_feature_enable_disable ("ip4-unicast", "acl-plugin-in-ip4-fa",
sw_if_index, enable_disable, 0, 0);
vnet_feature_enable_disable ("ip6-unicast", "acl-plugin-in-ip6-fa",
sw_if_index, enable_disable, 0, 0);
am->fa_in_acl_on_sw_if_index =
clib_bitmap_set (am->fa_in_acl_on_sw_if_index, sw_if_index,
enable_disable);
}
else
{
vnet_feature_enable_disable ("ip4-output", "acl-plugin-out-ip4-fa",
sw_if_index, enable_disable, 0, 0);
vnet_feature_enable_disable ("ip6-output", "acl-plugin-out-ip6-fa",
sw_if_index, enable_disable, 0, 0);
am->fa_out_acl_on_sw_if_index =
clib_bitmap_set (am->fa_out_acl_on_sw_if_index, sw_if_index,
enable_disable);
}
if ((!enable_disable) && (!acl_fa_ifc_has_in_acl (am, sw_if_index))
&& (!acl_fa_ifc_has_out_acl (am, sw_if_index)))
{
vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index,
ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX,
sw_if_index);
}
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (acl_fa_session_cleaner_process_node, static) = {
.function = acl_fa_session_cleaner_process,
.type = VLIB_NODE_TYPE_PROCESS,
.name = "acl-plugin-fa-cleaner-process",
.n_errors = ARRAY_LEN (acl_fa_cleaner_error_strings),
.error_strings = acl_fa_cleaner_error_strings,
.n_next_nodes = 0,
.next_nodes = {},
};
VLIB_REGISTER_NODE (acl_in_l2_ip6_node) =
{
.function = acl_in_ip6_l2_node_fn,
.name = "acl-plugin-in-ip6-l2",
.vector_size = sizeof (u32),
.format_trace = format_acl_fa_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN (acl_fa_error_strings),
.error_strings = acl_fa_error_strings,
.n_next_nodes = ACL_FA_N_NEXT,
.next_nodes =
{
[ACL_FA_ERROR_DROP] = "error-drop",
}
};
VLIB_REGISTER_NODE (acl_in_l2_ip4_node) =
{
.function = acl_in_ip4_l2_node_fn,
.name = "acl-plugin-in-ip4-l2",
.vector_size = sizeof (u32),
.format_trace = format_acl_fa_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN (acl_fa_error_strings),
.error_strings = acl_fa_error_strings,
.n_next_nodes = ACL_FA_N_NEXT,
.next_nodes =
{
[ACL_FA_ERROR_DROP] = "error-drop",
}
};
VLIB_REGISTER_NODE (acl_out_l2_ip6_node) =
{
.function = acl_out_ip6_l2_node_fn,
.name = "acl-plugin-out-ip6-l2",
.vector_size = sizeof (u32),
.format_trace = format_acl_fa_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN (acl_fa_error_strings),
.error_strings = acl_fa_error_strings,
.n_next_nodes = ACL_FA_N_NEXT,
.next_nodes =
{
[ACL_FA_ERROR_DROP] = "error-drop",
}
};
VLIB_REGISTER_NODE (acl_out_l2_ip4_node) =
{
.function = acl_out_ip4_l2_node_fn,
.name = "acl-plugin-out-ip4-l2",
.vector_size = sizeof (u32),
.format_trace = format_acl_fa_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN (acl_fa_error_strings),
.error_strings = acl_fa_error_strings,
.n_next_nodes = ACL_FA_N_NEXT,
.next_nodes =
{
[ACL_FA_ERROR_DROP] = "error-drop",
}
};
VLIB_REGISTER_NODE (acl_in_fa_ip6_node) =
{
.function = acl_in_ip6_fa_node_fn,
.name = "acl-plugin-in-ip6-fa",
.vector_size = sizeof (u32),
.format_trace = format_acl_fa_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN (acl_fa_error_strings),
.error_strings = acl_fa_error_strings,
.n_next_nodes = ACL_FA_N_NEXT,
.next_nodes =
{
[ACL_FA_ERROR_DROP] = "error-drop",
}
};
VNET_FEATURE_INIT (acl_in_ip6_fa_feature, static) =
{
.arc_name = "ip6-unicast",
.node_name = "acl-plugin-in-ip6-fa",
.runs_before = VNET_FEATURES ("ip6-flow-classify"),
};
VLIB_REGISTER_NODE (acl_in_fa_ip4_node) =
{
.function = acl_in_ip4_fa_node_fn,
.name = "acl-plugin-in-ip4-fa",
.vector_size = sizeof (u32),
.format_trace = format_acl_fa_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN (acl_fa_error_strings),
.error_strings = acl_fa_error_strings,
.n_next_nodes = ACL_FA_N_NEXT,
.next_nodes =
{
[ACL_FA_ERROR_DROP] = "error-drop",
}
};
VNET_FEATURE_INIT (acl_in_ip4_fa_feature, static) =
{
.arc_name = "ip4-unicast",
.node_name = "acl-plugin-in-ip4-fa",
.runs_before = VNET_FEATURES ("ip4-flow-classify"),
};
VLIB_REGISTER_NODE (acl_out_fa_ip6_node) =
{
.function = acl_out_ip6_fa_node_fn,
.name = "acl-plugin-out-ip6-fa",
.vector_size = sizeof (u32),
.format_trace = format_acl_fa_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN (acl_fa_error_strings),
.error_strings = acl_fa_error_strings,
.n_next_nodes = ACL_FA_N_NEXT,
.next_nodes =
{
[ACL_FA_ERROR_DROP] = "error-drop",
}
};
VNET_FEATURE_INIT (acl_out_ip6_fa_feature, static) =
{
.arc_name = "ip6-output",
.node_name = "acl-plugin-out-ip6-fa",
.runs_before = VNET_FEATURES ("interface-output"),
};
VLIB_REGISTER_NODE (acl_out_fa_ip4_node) =
{
.function = acl_out_ip4_fa_node_fn,
.name = "acl-plugin-out-ip4-fa",
.vector_size = sizeof (u32),
.format_trace = format_acl_fa_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN (acl_fa_error_strings),
.error_strings = acl_fa_error_strings,
.n_next_nodes = ACL_FA_N_NEXT,
/* edit / add dispositions here */
.next_nodes =
{
[ACL_FA_ERROR_DROP] = "error-drop",
}
};
VNET_FEATURE_INIT (acl_out_ip4_fa_feature, static) =
{
.arc_name = "ip4-output",
.node_name = "acl-plugin-out-ip4-fa",
.runs_before = VNET_FEATURES ("interface-output"),
};
/* *INDENT-ON* */