#include <nat/nat.h>
#include <nat/nat_ha.h>
+always_inline u64
+calc_nat_key (ip4_address_t addr, u16 port, u32 fib_index, u8 proto)
+{
+ ASSERT (fib_index <= (1 << 14) - 1);
+ ASSERT (proto <= (1 << 3) - 1);
+ return (u64) addr.as_u32 << 32 | (u64) port << 16 | fib_index << 3 |
+ (proto & 0x7);
+}
+
+always_inline void
+split_nat_key (u64 key, ip4_address_t * addr, u16 * port,
+ u32 * fib_index, nat_protocol_t * proto)
+{
+ if (addr)
+ {
+ addr->as_u32 = key >> 32;
+ }
+ if (port)
+ {
+ *port = (key >> 16) & (u16) ~ 0;
+ }
+ if (fib_index)
+ {
+ *fib_index = key >> 3 & ((1 << 13) - 1);
+ }
+ if (proto)
+ {
+ *proto = key & 0x7;
+ }
+}
+
+always_inline void
+init_nat_k (clib_bihash_kv_8_8_t * kv, ip4_address_t addr, u16 port,
+ u32 fib_index, nat_protocol_t proto)
+{
+ kv->key = calc_nat_key (addr, port, fib_index, proto);
+ kv->value = ~0ULL;
+}
+
+always_inline void
+init_nat_kv (clib_bihash_kv_8_8_t * kv, ip4_address_t addr, u16 port,
+ u32 fib_index, nat_protocol_t proto, u64 value)
+{
+ init_nat_k (kv, addr, port, fib_index, proto);
+ kv->value = value;
+}
+
+always_inline void
+init_nat_i2o_k (clib_bihash_kv_8_8_t * kv, snat_session_t * s)
+{
+ return init_nat_k (kv, s->in2out.addr, s->in2out.port, s->in2out.fib_index,
+ s->nat_proto);
+}
+
+always_inline void
+init_nat_i2o_kv (clib_bihash_kv_8_8_t * kv, snat_session_t * s, u64 value)
+{
+ init_nat_k (kv, s->in2out.addr, s->in2out.port, s->in2out.fib_index,
+ s->nat_proto);
+ kv->value = value;
+}
+
+always_inline void
+init_nat_o2i_k (clib_bihash_kv_8_8_t * kv, snat_session_t * s)
+{
+ return init_nat_k (kv, s->out2in.addr, s->out2in.port, s->out2in.fib_index,
+ s->nat_proto);
+}
+
+always_inline void
+init_nat_o2i_kv (clib_bihash_kv_8_8_t * kv, snat_session_t * s, u64 value)
+{
+ init_nat_k (kv, s->out2in.addr, s->out2in.port, s->out2in.fib_index,
+ s->nat_proto);
+ kv->value = value;
+}
+
static inline uword
nat_pre_node_fn_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_prefetch_buffer_header (p2, LOAD);
vlib_prefetch_buffer_header (p3, LOAD);
- CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
- CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, LOAD);
}
/* speculatively enqueue b0 and b1 to the current next frame */
return frame->n_vectors;
}
-always_inline u32
-ip_proto_to_snat_proto (u8 ip_proto)
-{
- u32 snat_proto = ~0;
-
- snat_proto = (ip_proto == IP_PROTOCOL_UDP) ? SNAT_PROTOCOL_UDP : snat_proto;
- snat_proto = (ip_proto == IP_PROTOCOL_TCP) ? SNAT_PROTOCOL_TCP : snat_proto;
- snat_proto =
- (ip_proto == IP_PROTOCOL_ICMP) ? SNAT_PROTOCOL_ICMP : snat_proto;
- snat_proto =
- (ip_proto == IP_PROTOCOL_ICMP6) ? SNAT_PROTOCOL_ICMP : snat_proto;
-
- return snat_proto;
-}
-
-always_inline u8
-snat_proto_to_ip_proto (snat_protocol_t snat_proto)
-{
- u8 ip_proto = ~0;
-
- ip_proto = (snat_proto == SNAT_PROTOCOL_UDP) ? IP_PROTOCOL_UDP : ip_proto;
- ip_proto = (snat_proto == SNAT_PROTOCOL_TCP) ? IP_PROTOCOL_TCP : ip_proto;
- ip_proto = (snat_proto == SNAT_PROTOCOL_ICMP) ? IP_PROTOCOL_ICMP : ip_proto;
-
- return ip_proto;
-}
-
-static_always_inline u8
-icmp_type_is_error_message (u8 icmp_type)
-{
- switch (icmp_type)
- {
- case ICMP4_destination_unreachable:
- case ICMP4_time_exceeded:
- case ICMP4_parameter_problem:
- case ICMP4_source_quench:
- case ICMP4_redirect:
- case ICMP4_alternate_host_address:
- return 1;
- }
- return 0;
-}
-
always_inline u8
is_interface_addr (snat_main_t * sm, vlib_node_runtime_t * node,
u32 sw_if_index0, u32 ip4_addr)
clib_dlist_remove (tsm->list_pool, ses->per_user_index);
pool_put_index (tsm->list_pool, ses->per_user_index);
- clib_dlist_remove (tsm->global_lru_pool, ses->global_lru_index);
- pool_put_index (tsm->global_lru_pool, ses->global_lru_index);
+ if (sm->endpoint_dependent)
+ {
+ clib_dlist_remove (tsm->lru_pool, ses->lru_index);
+ pool_put_index (tsm->lru_pool, ses->lru_index);
+ }
pool_put (tsm->sessions, ses);
vlib_set_simple_counter (&sm->total_sessions, thread_index, 0,
pool_elts (tsm->sessions));
}
}
-always_inline void
-nat44_ed_delete_session (snat_main_t * sm, snat_session_t * ses,
- u32 thread_index, int global_lru_delete
- /* delete from global LRU list */ )
-{
- snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
- thread_index);
-
- if (global_lru_delete)
- {
- clib_dlist_remove (tsm->global_lru_pool, ses->global_lru_index);
- }
- pool_put_index (tsm->global_lru_pool, ses->global_lru_index);
- pool_put (tsm->sessions, ses);
- vlib_set_simple_counter (&sm->total_sessions, thread_index, 0,
- pool_elts (tsm->sessions));
-
-}
-
/** \brief Set TCP session state.
@return 1 if session was closed, otherwise 0
*/
snat_session_t * ses, vlib_buffer_t * b,
u32 thread_index)
{
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
u8 tcp_flags = vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags;
u32 tcp_ack_number = vnet_buffer (b)->ip.reass.tcp_ack_number;
u32 tcp_seq_number = vnet_buffer (b)->ip.reass.tcp_seq_number;
ses->state |= NAT44_SES_O2I_FIN_ACK;
if (nat44_is_ses_closed (ses))
{ // if session is now closed, save the timestamp
- ses->tcp_close_timestamp = now + sm->tcp_transitory_timeout;
+ ses->tcp_closed_timestamp = now + sm->tcp_transitory_timeout;
+ ses->last_lru_update = now;
}
}
}
+
+ // move the session to proper LRU
+ if (ses->state)
+ {
+ ses->lru_head_index = tsm->tcp_trans_lru_head_index;
+ }
+ else
+ {
+ ses->lru_head_index = tsm->tcp_estab_lru_head_index;
+ }
+ clib_dlist_remove (tsm->lru_pool, ses->lru_index);
+ clib_dlist_addtail (tsm->lru_pool, ses->lru_head_index, ses->lru_index);
return 0;
}
u32 tcp_ack_number, u32 tcp_seq_number,
u32 thread_index)
{
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
if ((ses->state == 0) && (tcp_flags & TCP_FLAG_RST))
ses->state = NAT44_SES_RST;
if ((ses->state == NAT44_SES_RST) && !(tcp_flags & TCP_FLAG_RST))
ses->state |= NAT44_SES_I2O_FIN_ACK;
if (nat44_is_ses_closed (ses))
{ // if session is now closed, save the timestamp
- ses->tcp_close_timestamp = now + sm->tcp_transitory_timeout;
+ ses->tcp_closed_timestamp = now + sm->tcp_transitory_timeout;
+ ses->last_lru_update = now;
}
}
+ // move the session to proper LRU
+ if (ses->state)
+ {
+ ses->lru_head_index = tsm->tcp_trans_lru_head_index;
+ }
+ else
+ {
+ ses->lru_head_index = tsm->tcp_estab_lru_head_index;
+ }
+ clib_dlist_remove (tsm->lru_pool, ses->lru_index);
+ clib_dlist_addtail (tsm->lru_pool, ses->lru_head_index, ses->lru_index);
return 0;
}
always_inline u32
nat44_session_get_timeout (snat_main_t * sm, snat_session_t * s)
{
- switch (s->in2out.protocol)
+ switch (s->nat_proto)
{
- case SNAT_PROTOCOL_ICMP:
+ case NAT_PROTOCOL_ICMP:
return sm->icmp_timeout;
- case SNAT_PROTOCOL_UDP:
+ case NAT_PROTOCOL_UDP:
return sm->udp_timeout;
- case SNAT_PROTOCOL_TCP:
+ case NAT_PROTOCOL_TCP:
{
if (s->state)
return sm->tcp_transitory_timeout;
s->total_pkts++;
s->total_bytes += bytes;
nat_ha_sref (&s->out2in.addr, s->out2in.port, &s->ext_host_addr,
- s->ext_host_port, s->out2in.protocol, s->out2in.fib_index,
+ s->ext_host_port, s->nat_proto, s->out2in.fib_index,
s->total_pkts, s->total_bytes, thread_index,
&s->ha_last_refreshed, now);
}
nat44_session_update_lru (snat_main_t * sm, snat_session_t * s,
u32 thread_index)
{
- /* don't update too often - timeout is in a magnitude of seconds anyway */
+ /* don't update too often - timeout is in magnitude of seconds anyway */
if (s->last_heard > s->last_lru_update + 1)
{
if (!sm->endpoint_dependent)
clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
s->per_user_list_head_index, s->per_user_index);
}
-
- clib_dlist_remove (sm->per_thread_data[thread_index].global_lru_pool,
- s->global_lru_index);
- clib_dlist_addtail (sm->per_thread_data[thread_index].global_lru_pool,
- sm->
- per_thread_data[thread_index].global_lru_head_index,
- s->global_lru_index);
+ else
+ {
+ clib_dlist_remove (sm->per_thread_data[thread_index].lru_pool,
+ s->lru_index);
+ clib_dlist_addtail (sm->per_thread_data[thread_index].lru_pool,
+ s->lru_head_index, s->lru_index);
+ }
s->last_lru_update = s->last_heard;
}
}
always_inline void
-make_ed_kv (ip4_address_t * l_addr, ip4_address_t * r_addr, u8 proto,
- u32 fib_index, u16 l_port, u16 r_port, u64 value,
- clib_bihash_kv_16_8_t * kv)
+init_ed_k (clib_bihash_kv_16_8_t * kv, ip4_address_t l_addr, u16 l_port,
+ ip4_address_t r_addr, u16 r_port, u32 fib_index, u8 proto)
{
- kv->key[0] = (u64) r_addr->as_u32 << 32 | l_addr->as_u32;
+ kv->key[0] = (u64) r_addr.as_u32 << 32 | l_addr.as_u32;
kv->key[1] =
(u64) r_port << 48 | (u64) l_port << 32 | fib_index << 8 | proto;
- kv->value = value;
+}
+
+always_inline void
+init_ed_kv (clib_bihash_kv_16_8_t * kv, ip4_address_t l_addr, u16 l_port,
+ ip4_address_t r_addr, u16 r_port, u32 fib_index, u8 proto,
+ u32 thread_index, u32 session_index)
+{
+ init_ed_k (kv, l_addr, l_port, r_addr, r_port, fib_index, proto);
+ kv->value = (u64) thread_index << 32 | session_index;
+}
+
+always_inline u32
+ed_value_get_thread_index (clib_bihash_kv_16_8_t * value)
+{
+ return value->value >> 32;
+}
+
+always_inline u32
+ed_value_get_session_index (clib_bihash_kv_16_8_t * value)
+{
+ return value->value & ~(u32) 0;
+}
+
+always_inline void
+split_ed_value (clib_bihash_kv_16_8_t * value, u32 * thread_index,
+ u32 * session_index)
+{
+ if (thread_index)
+ {
+ *thread_index = ed_value_get_thread_index (value);
+ }
+ if (session_index)
+ {
+ *session_index = ed_value_get_session_index (value);
+ }
}
always_inline void
}
}
-always_inline void
-make_sm_kv (clib_bihash_kv_8_8_t * kv, ip4_address_t * addr, u8 proto,
- u32 fib_index, u16 port)
-{
- kv->key = (u64) fib_index << 51 | (u64) proto << 48 | (u64) port << 32 |
- addr->as_u32;
-
- kv->value = ~0ULL;
-}
-
static_always_inline int
get_icmp_i2o_ed_key (vlib_buffer_t * b, ip4_header_t * ip0, u32 rx_fib_index,
- u64 value, u8 * snat_proto, u16 * l_port, u16 * r_port,
+ u32 thread_index, u32 session_index,
+ nat_protocol_t * nat_proto, u16 * l_port, u16 * r_port,
clib_bihash_kv_16_8_t * kv)
{
u8 proto;
proto = IP_PROTOCOL_ICMP;
l_addr = &ip0->src_address;
r_addr = &ip0->dst_address;
- _l_port = vnet_buffer (b)->ip.reass.l4_src_port; // TODO should this be src or dst?
+ _l_port = vnet_buffer (b)->ip.reass.l4_src_port;
_r_port = 0;
}
else
proto = inner_ip0->protocol;
r_addr = &inner_ip0->src_address;
l_addr = &inner_ip0->dst_address;
- switch (ip_proto_to_snat_proto (inner_ip0->protocol))
+ switch (ip_proto_to_nat_proto (inner_ip0->protocol))
{
- case SNAT_PROTOCOL_ICMP:
+ case NAT_PROTOCOL_ICMP:
inner_icmp0 = (icmp46_header_t *) l4_header;
inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
_r_port = 0;
_l_port = inner_echo0->identifier;
break;
- case SNAT_PROTOCOL_UDP:
- case SNAT_PROTOCOL_TCP:
+ case NAT_PROTOCOL_UDP:
+ case NAT_PROTOCOL_TCP:
_l_port = ((tcp_udp_header_t *) l4_header)->dst_port;
_r_port = ((tcp_udp_header_t *) l4_header)->src_port;
break;
return NAT_IN2OUT_ED_ERROR_UNSUPPORTED_PROTOCOL;
}
}
- make_ed_kv (l_addr, r_addr, proto, rx_fib_index, _l_port, _r_port, value,
- kv);
- if (snat_proto)
+ init_ed_kv (kv, *l_addr, _l_port, *r_addr, _r_port, rx_fib_index, proto,
+ thread_index, session_index);
+ if (nat_proto)
{
- *snat_proto = ip_proto_to_snat_proto (proto);
+ *nat_proto = ip_proto_to_nat_proto (proto);
}
if (l_port)
{
return 0;
}
-
static_always_inline int
get_icmp_o2i_ed_key (vlib_buffer_t * b, ip4_header_t * ip0, u32 rx_fib_index,
- u64 value, u8 * snat_proto, u16 * l_port, u16 * r_port,
+ u32 thread_index, u32 session_index,
+ nat_protocol_t * nat_proto, u16 * l_port, u16 * r_port,
clib_bihash_kv_16_8_t * kv)
{
icmp46_header_t *icmp0;
proto = IP_PROTOCOL_ICMP;
l_addr = &ip0->dst_address;
r_addr = &ip0->src_address;
- _l_port = vnet_buffer (b)->ip.reass.l4_src_port; // TODO should this be src or dst?
+ _l_port = vnet_buffer (b)->ip.reass.l4_src_port;
_r_port = 0;
}
else
proto = inner_ip0->protocol;
l_addr = &inner_ip0->src_address;
r_addr = &inner_ip0->dst_address;
- switch (ip_proto_to_snat_proto (inner_ip0->protocol))
+ switch (ip_proto_to_nat_proto (inner_ip0->protocol))
{
- case SNAT_PROTOCOL_ICMP:
+ case NAT_PROTOCOL_ICMP:
inner_icmp0 = (icmp46_header_t *) l4_header;
inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
_l_port = inner_echo0->identifier;
_r_port = 0;
break;
- case SNAT_PROTOCOL_UDP:
- case SNAT_PROTOCOL_TCP:
+ case NAT_PROTOCOL_UDP:
+ case NAT_PROTOCOL_TCP:
_l_port = ((tcp_udp_header_t *) l4_header)->src_port;
_r_port = ((tcp_udp_header_t *) l4_header)->dst_port;
break;
return -1;
}
}
- make_ed_kv (l_addr, r_addr, proto, rx_fib_index, _l_port, _r_port, value,
- kv);
- if (snat_proto)
+ init_ed_kv (kv, *l_addr, _l_port, *r_addr, _r_port, rx_fib_index, proto,
+ thread_index, session_index);
+ if (nat_proto)
{
- *snat_proto = ip_proto_to_snat_proto (proto);
+ *nat_proto = ip_proto_to_nat_proto (proto);
}
if (l_port)
{
return 0;
}
-always_inline void
-mss_clamping (snat_main_t * sm, tcp_header_t * tcp, ip_csum_t * sum)
-{
- u8 *data;
- u8 opt_len, opts_len, kind;
- u16 mss;
-
- if (!(sm->mss_clamping && tcp_syn (tcp)))
- return;
-
- opts_len = (tcp_doff (tcp) << 2) - sizeof (tcp_header_t);
- data = (u8 *) (tcp + 1);
- for (; opts_len > 0; opts_len -= opt_len, data += opt_len)
- {
- kind = data[0];
-
- if (kind == TCP_OPTION_EOL)
- break;
- else if (kind == TCP_OPTION_NOOP)
- {
- opt_len = 1;
- continue;
- }
- else
- {
- if (opts_len < 2)
- return;
- opt_len = data[1];
-
- if (opt_len < 2 || opt_len > opts_len)
- return;
- }
-
- if (kind == TCP_OPTION_MSS)
- {
- mss = *(u16 *) (data + 2);
- if (clib_net_to_host_u16 (mss) > sm->mss_clamping)
- {
- *sum =
- ip_csum_update (*sum, mss, sm->mss_value_net, ip4_header_t,
- length);
- clib_memcpy_fast (data + 2, &sm->mss_value_net, 2);
- }
- return;
- }
- }
-}
-
/**
* @brief Check if packet should be translated
*
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