#include <nat/nat.h>
#include <nat/nat_ha.h>
+static inline uword
+nat_pre_node_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, u32 def_next)
+{
+ u32 n_left_from, *from, *to_next;
+ u16 next_index;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_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 >= 4 && n_left_to_next >= 2)
+ {
+ u32 next0, next1;
+ u32 arc_next0, arc_next1;
+ u32 bi0, bi1;
+ vlib_buffer_t *b0, *b1;
+
+ /* Prefetch next iteration. */
+ {
+ vlib_buffer_t *p2, *p3;
+
+ p2 = vlib_get_buffer (vm, from[2]);
+ p3 = vlib_get_buffer (vm, from[3]);
+
+ 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);
+ }
+
+ /* speculatively enqueue b0 and b1 to the current next frame */
+ to_next[0] = bi0 = from[0];
+ to_next[1] = bi1 = from[1];
+ from += 2;
+ to_next += 2;
+ n_left_from -= 2;
+ n_left_to_next -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ next0 = def_next;
+ next1 = def_next;
+
+ vnet_feature_next (&arc_next0, b0);
+ vnet_feature_next (&arc_next1, b1);
+
+ nat_buffer_opaque (b0)->arc_next = arc_next0;
+ nat_buffer_opaque (b1)->arc_next = arc_next1;
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
+ {
+ if (b0->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ nat_pre_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->next_index = next0;
+ }
+ if (b1->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ nat_pre_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->next_index = next0;
+ }
+ }
+
+ /* verify speculative enqueues, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 next0;
+ u32 arc_next0;
+ u32 bi0;
+ vlib_buffer_t *b0;
+
+ /* 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);
+ next0 = def_next;
+ vnet_feature_next (&arc_next0, b0);
+ nat_buffer_opaque (b0)->arc_next = arc_next0;
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat_pre_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->next_index = next0;
+ }
+
+ /* 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);
+ }
+
+ return frame->n_vectors;
+}
+
always_inline u32
ip_proto_to_snat_proto (u8 ip_proto)
{
}
static_always_inline u8
-icmp_is_error_message (icmp46_header_t * icmp)
+icmp_type_is_error_message (u8 icmp_type)
{
- switch (icmp->type)
+ switch (icmp_type)
{
case ICMP4_destination_unreachable:
case ICMP4_time_exceeded:
}
always_inline void
-nat44_delete_session (snat_main_t * sm, snat_session_t * ses,
- u32 thread_index)
+nat44_delete_session_internal (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);
clib_bihash_kv_8_8_t kv, value;
- snat_user_key_t u_key;
snat_user_t *u;
-
- nat_log_debug ("session deleted %U", format_snat_session, tsm, ses);
+ const snat_user_key_t u_key = {
+ .addr = ses->in2out.addr,
+ .fib_index = ses->in2out.fib_index
+ };
+ const u8 u_static = snat_is_session_static (ses);
clib_dlist_remove (tsm->list_pool, ses->per_user_index);
pool_put_index (tsm->list_pool, ses->per_user_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));
- u_key.addr = ses->in2out.addr;
- u_key.fib_index = ses->in2out.fib_index;
kv.key = u_key.as_u64;
if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
{
u = pool_elt_at_index (tsm->users, value.value);
- if (snat_is_session_static (ses))
+ if (u_static)
u->nstaticsessions--;
else
u->nsessions--;
}
}
+always_inline void
+nat44_delete_session (snat_main_t * sm, snat_session_t * ses,
+ u32 thread_index)
+{
+ return nat44_delete_session_internal (sm, ses, thread_index, 1);
+}
+
+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 */ )
+{
+ return nat44_delete_session_internal (sm, ses, thread_index,
+ global_lru_delete);
+}
+
/** \brief Set TCP session state.
@return 1 if session was closed, otherwise 0
*/
always_inline int
-nat44_set_tcp_session_state_i2o (snat_main_t * sm, snat_session_t * ses,
- tcp_header_t * tcp, u32 thread_index)
+nat44_set_tcp_session_state_i2o (snat_main_t * sm, f64 now,
+ snat_session_t * ses, vlib_buffer_t * b,
+ u32 thread_index)
{
- if ((ses->state == 0) && (tcp->flags & TCP_FLAG_RST))
+ 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;
+ 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))
+ if ((ses->state == NAT44_SES_RST) && !(tcp_flags & TCP_FLAG_RST))
ses->state = 0;
- if ((tcp->flags & TCP_FLAG_ACK) && (ses->state & NAT44_SES_I2O_SYN) &&
+ if ((tcp_flags & TCP_FLAG_ACK) && (ses->state & NAT44_SES_I2O_SYN) &&
(ses->state & NAT44_SES_O2I_SYN))
ses->state = 0;
- if (tcp->flags & TCP_FLAG_SYN)
+ if (tcp_flags & TCP_FLAG_SYN)
ses->state |= NAT44_SES_I2O_SYN;
- if (tcp->flags & TCP_FLAG_FIN)
+ if (tcp_flags & TCP_FLAG_FIN)
{
- ses->i2o_fin_seq = clib_net_to_host_u32 (tcp->seq_number);
+ ses->i2o_fin_seq = clib_net_to_host_u32 (tcp_seq_number);
ses->state |= NAT44_SES_I2O_FIN;
}
- if ((tcp->flags & TCP_FLAG_ACK) && (ses->state & NAT44_SES_O2I_FIN))
- {
- if (clib_net_to_host_u32 (tcp->ack_number) > ses->o2i_fin_seq)
- ses->state |= NAT44_SES_O2I_FIN_ACK;
- }
- if (nat44_is_ses_closed (ses)
- && !(ses->flags & SNAT_SESSION_FLAG_OUTPUT_FEATURE))
+ if ((tcp_flags & TCP_FLAG_ACK) && (ses->state & NAT44_SES_O2I_FIN))
{
- nat_log_debug ("TCP close connection %U", format_snat_session,
- &sm->per_thread_data[thread_index], ses);
- nat_free_session_data (sm, ses, thread_index, 0);
- nat44_delete_session (sm, ses, thread_index);
- return 1;
+ if (clib_net_to_host_u32 (tcp_ack_number) > ses->o2i_fin_seq)
+ {
+ 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;
+ }
+ }
}
return 0;
}
always_inline int
-nat44_set_tcp_session_state_o2i (snat_main_t * sm, snat_session_t * ses,
- tcp_header_t * tcp, u32 thread_index)
+nat44_set_tcp_session_state_o2i (snat_main_t * sm, f64 now,
+ snat_session_t * ses, u8 tcp_flags,
+ u32 tcp_ack_number, u32 tcp_seq_number,
+ u32 thread_index)
{
- if ((ses->state == 0) && (tcp->flags & TCP_FLAG_RST))
+ 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))
+ if ((ses->state == NAT44_SES_RST) && !(tcp_flags & TCP_FLAG_RST))
ses->state = 0;
- if ((tcp->flags & TCP_FLAG_ACK) && (ses->state & NAT44_SES_I2O_SYN) &&
+ if ((tcp_flags & TCP_FLAG_ACK) && (ses->state & NAT44_SES_I2O_SYN) &&
(ses->state & NAT44_SES_O2I_SYN))
ses->state = 0;
- if (tcp->flags & TCP_FLAG_SYN)
+ if (tcp_flags & TCP_FLAG_SYN)
ses->state |= NAT44_SES_O2I_SYN;
- if (tcp->flags & TCP_FLAG_FIN)
+ if (tcp_flags & TCP_FLAG_FIN)
{
- ses->o2i_fin_seq = clib_net_to_host_u32 (tcp->seq_number);
+ ses->o2i_fin_seq = clib_net_to_host_u32 (tcp_seq_number);
ses->state |= NAT44_SES_O2I_FIN;
}
- if ((tcp->flags & TCP_FLAG_ACK) && (ses->state & NAT44_SES_I2O_FIN))
+ if ((tcp_flags & TCP_FLAG_ACK) && (ses->state & NAT44_SES_I2O_FIN))
{
- if (clib_net_to_host_u32 (tcp->ack_number) > ses->i2o_fin_seq)
+ if (clib_net_to_host_u32 (tcp_ack_number) > ses->i2o_fin_seq)
ses->state |= NAT44_SES_I2O_FIN_ACK;
- }
- if (nat44_is_ses_closed (ses))
- {
- nat_log_debug ("TCP close connection %U", format_snat_session,
- &sm->per_thread_data[thread_index], ses);
- nat_free_session_data (sm, ses, thread_index, 0);
- nat44_delete_session (sm, ses, thread_index);
- return 1;
+ if (nat44_is_ses_closed (ses))
+ { // if session is now closed, save the timestamp
+ ses->tcp_close_timestamp = now + sm->tcp_transitory_timeout;
+ }
}
return 0;
}
nat44_session_update_lru (snat_main_t * sm, snat_session_t * s,
u32 thread_index)
{
- clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
- s->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
- s->per_user_list_head_index, s->per_user_index);
+ /* don't update too often - timeout is in a magnitude of seconds anyway */
+ if (s->last_heard > s->last_lru_update + 1)
+ {
+ clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
+ s->per_user_index);
+ 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);
+ s->last_lru_update = s->last_heard;
+ }
}
always_inline void
kv->value = ~0ULL;
}
+static_always_inline int
+get_icmp_i2o_ed_key (vlib_buffer_t * b, ip4_header_t * ip0,
+ nat_ed_ses_key_t * p_key0)
+{
+ icmp46_header_t *icmp0;
+ nat_ed_ses_key_t key0;
+ icmp_echo_header_t *echo0, *inner_echo0 = 0;
+ ip4_header_t *inner_ip0 = 0;
+ void *l4_header = 0;
+ icmp46_header_t *inner_icmp0;
+
+ icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
+ echo0 = (icmp_echo_header_t *) (icmp0 + 1);
+
+ if (!icmp_type_is_error_message
+ (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags))
+ {
+ key0.proto = IP_PROTOCOL_ICMP;
+ key0.l_addr = ip0->src_address;
+ key0.r_addr = ip0->dst_address;
+ key0.l_port = vnet_buffer (b)->ip.reass.l4_src_port; // TODO should this be src or dst?
+ key0.r_port = 0;
+ }
+ else
+ {
+ inner_ip0 = (ip4_header_t *) (echo0 + 1);
+ l4_header = ip4_next_header (inner_ip0);
+ key0.proto = inner_ip0->protocol;
+ key0.r_addr = inner_ip0->src_address;
+ key0.l_addr = inner_ip0->dst_address;
+ switch (ip_proto_to_snat_proto (inner_ip0->protocol))
+ {
+ case SNAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t *) l4_header;
+ inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
+ key0.r_port = 0;
+ key0.l_port = inner_echo0->identifier;
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ key0.l_port = ((tcp_udp_header_t *) l4_header)->dst_port;
+ key0.r_port = ((tcp_udp_header_t *) l4_header)->src_port;
+ break;
+ default:
+ return NAT_IN2OUT_ED_ERROR_UNSUPPORTED_PROTOCOL;
+ }
+ }
+ *p_key0 = key0;
+ return 0;
+}
+
+
+static_always_inline int
+get_icmp_o2i_ed_key (vlib_buffer_t * b, ip4_header_t * ip0,
+ nat_ed_ses_key_t * p_key0)
+{
+ icmp46_header_t *icmp0;
+ nat_ed_ses_key_t key0;
+ icmp_echo_header_t *echo0, *inner_echo0 = 0;
+ ip4_header_t *inner_ip0;
+ void *l4_header = 0;
+ icmp46_header_t *inner_icmp0;
+
+ icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
+ echo0 = (icmp_echo_header_t *) (icmp0 + 1);
+
+ if (!icmp_type_is_error_message
+ (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags))
+ {
+ key0.proto = IP_PROTOCOL_ICMP;
+ key0.l_addr = ip0->dst_address;
+ key0.r_addr = ip0->src_address;
+ key0.l_port = vnet_buffer (b)->ip.reass.l4_src_port; // TODO should this be src or dst?
+ key0.r_port = 0;
+ }
+ else
+ {
+ inner_ip0 = (ip4_header_t *) (echo0 + 1);
+ l4_header = ip4_next_header (inner_ip0);
+ key0.proto = inner_ip0->protocol;
+ key0.l_addr = inner_ip0->src_address;
+ key0.r_addr = inner_ip0->dst_address;
+ switch (ip_proto_to_snat_proto (inner_ip0->protocol))
+ {
+ case SNAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t *) l4_header;
+ inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
+ key0.l_port = inner_echo0->identifier;
+ key0.r_port = 0;
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ key0.l_port = ((tcp_udp_header_t *) l4_header)->src_port;
+ key0.r_port = ((tcp_udp_header_t *) l4_header)->dst_port;
+ break;
+ default:
+ return -1;
+ }
+ }
+ *p_key0 = key0;
+ return 0;
+}
+
always_inline void
mss_clamping (snat_main_t * sm, tcp_header_t * tcp, ip_csum_t * sum)
{
return 1;
snat_interface_t *i;
- pool_foreach (i, sm->interfaces, (
- {
- /* NAT packet aimed at outside interface */
- if ((nat_interface_is_outside (i))
- && (sw_if_index ==
- i->sw_if_index)) return 0;}
- ));
+ /* *INDENT-OFF* */
+ pool_foreach (i, sm->interfaces, ({
+ /* NAT packet aimed at outside interface */
+ if ((nat_interface_is_outside (i)) && (sw_if_index == i->sw_if_index))
+ return 0;
+ }));
+ /* *INDENT-ON* */
}
return 1;
}
+static inline void
+increment_v4_address (ip4_address_t * a)
+{
+ u32 v;
+
+ v = clib_net_to_host_u32 (a->as_u32) + 1;
+ a->as_u32 = clib_host_to_net_u32 (v);
+}
+
#endif /* __included_nat_inlines_h__ */
/*
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