#include <nat/nat44/ed_inlines.h>
#include <nat/lib/nat_inlines.h>
+/* number of attempts to get a port for ED overloading algorithm, if rolling
+ * a dice this many times doesn't produce a free port, it's treated
+ * as if there were no free ports available to conserve resources */
+#define ED_PORT_ALLOC_ATTEMPTS (10)
+
static char *nat_in2out_ed_error_strings[] = {
#define _(sym,string) string,
foreach_nat_in2out_ed_error
if (a->fib_index == rx_fib_index) \
{ \
/* first try port suggested by caller */ \
- u16 port = clib_net_to_host_u16 (*outside_port); \
+ u16 port = clib_net_to_host_u16 (*outside_port); \
u16 port_offset = port - port_thread_offset; \
if (port <= port_thread_offset || \
port > port_thread_offset + port_per_thread) \
{ \
/* need to pick a different port, suggested port doesn't fit in \
* this thread's port range */ \
- port_offset = snat_random_port (1, port_per_thread); \
+ port_offset = snat_random_port (0, port_per_thread - 1); \
port = port_thread_offset + port_offset; \
} \
- u16 attempts = port_per_thread; \
+ u16 attempts = ED_PORT_ALLOC_ATTEMPTS; \
do \
{ \
init_ed_kv (out2in_ed_kv, a->addr, clib_host_to_net_u16 (port), \
++a->busy_##n##_port_refcounts[port]; \
a->busy_##n##_ports_per_thread[thread_index]++; \
a->busy_##n##_ports++; \
- *outside_addr = a->addr; \
- *outside_port = clib_host_to_net_u16 (port); \
+ *outside_addr = a->addr; \
+ *outside_port = clib_host_to_net_u16 (port); \
return 0; \
} \
- port_offset = (port_offset + 1) % port_per_thread; \
+ port_offset = snat_random_port (0, port_per_thread - 1); \
port = port_thread_offset + port_offset; \
--attempts; \
} \
/* First try to match static mapping by local address and port */
if (snat_static_mapping_match
(sm, l_addr, l_port, rx_fib_index, nat_proto, &sm_addr, &sm_port,
- &sm_fib_index, 0, 0, 0, &lb, 0, &identity_nat))
+ &sm_fib_index, 0, 0, 0, &lb, 0, &identity_nat, 0))
{
s = nat_ed_session_alloc (sm, thread_index, now, proto);
ASSERT (s);
&s->ext_host_nat_addr, s->ext_host_nat_port,
s->nat_proto, s->in2out.fib_index, s->flags, thread_index, 0);
+ per_vrf_sessions_register_session (s, thread_index);
+
return next;
}
if (clib_bihash_search_16_8 (&sm->out2in_ed, &kv, &value))
{
/* or is static mappings */
- ip4_address_t dummy_addr;
- u16 dummy_port;
- u32 dummy_fib_index;
+ ip4_address_t placeholder_addr;
+ u16 placeholder_port;
+ u32 placeholder_fib_index;
if (!snat_static_mapping_match
(sm, ip->dst_address, udp->dst_port, sm->outside_fib_index, proto,
- &dummy_addr, &dummy_port, &dummy_fib_index, 1, 0, 0, 0, 0, 0))
+ &placeholder_addr, &placeholder_port, &placeholder_fib_index, 1, 0,
+ 0, 0, 0, 0, 0))
return 0;
}
else
s - tsm->sessions);
if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &s_kv, 1))
nat_elog_notice ("out2in key add failed");
+
+ per_vrf_sessions_register_session (s, thread_index);
}
/* Update IP checksum */
vlib_frame_t * frame,
int is_output_feature)
{
- u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
- nat_next_t next_index;
+ u32 n_left_from, *from;
snat_main_t *sm = &snat_main;
f64 now = vlib_time_now (vm);
u32 thread_index = vm->thread_index;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets =
- 0, def_slow;
-
- def_slow = is_output_feature ? NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH :
- NAT_NEXT_IN2OUT_ED_SLOW_PATH;
-
- stats_node_index = sm->ed_in2out_node_index;
+ u32 def_slow = is_output_feature ? NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH
+ : NAT_NEXT_IN2OUT_ED_SLOW_PATH;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
+
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
+ vlib_get_buffers (vm, from, b, n_left_from);
while (n_left_from > 0)
{
- u32 n_left_to_next;
+ vlib_buffer_t *b0;
+ u32 sw_if_index0, rx_fib_index0, proto0, new_addr0, old_addr0,
+ iph_offset0 = 0;
+ u16 old_port0, new_port0;
+ ip4_header_t *ip0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ snat_session_t *s0 = 0;
+ clib_bihash_kv_16_8_t kv0, value0;
+ ip_csum_t sum0;
+
+ b0 = *b;
+ b++;
+
+ /* Prefetch next iteration. */
+ if (PREDICT_TRUE (n_left_from >= 2))
+ {
+ vlib_buffer_t *p2;
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ p2 = *b;
- while (n_left_from > 0 && n_left_to_next > 0)
+ vlib_prefetch_buffer_header (p2, LOAD);
+
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
+ }
+
+ if (is_output_feature)
{
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0,
- new_addr0, old_addr0;
- u16 old_port0, new_port0;
- ip4_header_t *ip0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- snat_session_t *s0 = 0;
- clib_bihash_kv_16_8_t kv0, value0;
- ip_csum_t sum0;
-
- /* 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);
+ vnet_feature_next (&vnet_buffer2 (b0)->nat.arc_next, b0);
+ iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
+ }
- if (is_output_feature)
- {
- vnet_feature_next (&vnet_buffer2 (b0)->nat.arc_next, b0);
- iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
- }
+ next[0] = vnet_buffer2 (b0)->nat.arc_next;
- next0 = vnet_buffer2 (b0)->nat.arc_next;
+ ip0 =
+ (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + iph_offset0);
- ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
- iph_offset0);
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index0);
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 =
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index0);
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next[0] = NAT_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
- if (PREDICT_FALSE (ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = NAT_NEXT_ICMP_ERROR;
- goto trace0;
- }
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ proto0 = ip_proto_to_nat_proto (ip0->protocol);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- proto0 = ip_proto_to_nat_proto (ip0->protocol);
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
+ {
+ next[0] = def_slow;
+ goto trace0;
+ }
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
- {
- next0 = def_slow;
- goto trace0;
- }
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE
+ (nat_not_translate_output_feature_fwd
+ (sm, ip0, thread_index, now, vm, b0)))
+ goto trace0;
+ }
- if (is_output_feature)
- {
- if (PREDICT_FALSE (nat_not_translate_output_feature_fwd
- (sm, ip0, thread_index, now, vm, b0)))
- goto trace0;
- }
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
+ {
+ next[0] = def_slow;
+ goto trace0;
+ }
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
- {
- next0 = def_slow;
- goto trace0;
- }
+ init_ed_k (&kv0, ip0->src_address,
+ vnet_buffer (b0)->ip.reass.l4_src_port, ip0->dst_address,
+ vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
+ ip0->protocol);
- init_ed_k (&kv0, ip0->src_address,
- vnet_buffer (b0)->ip.reass.l4_src_port, ip0->dst_address,
- vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
- ip0->protocol);
+ // lookup for session
+ if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
+ {
+ // session does not exist go slow path
+ next[0] = def_slow;
+ goto trace0;
+ }
+ ASSERT (thread_index == ed_value_get_thread_index (&value0));
+ s0 =
+ pool_elt_at_index (tsm->sessions,
+ ed_value_get_session_index (&value0));
- // lookup for session
- if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
- {
- // session does not exist go slow path
- next0 = def_slow;
- goto trace0;
- }
- ASSERT (thread_index == ed_value_get_thread_index (&value0));
- s0 =
- pool_elt_at_index (tsm->sessions,
- ed_value_get_session_index (&value0));
+ if (PREDICT_FALSE (per_vrf_sessions_is_expired (s0, thread_index)))
+ {
+ // session is closed, go slow path
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat_ed_session_delete (sm, s0, thread_index, 1);
+ next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
+ goto trace0;
+ }
- if (s0->tcp_closed_timestamp)
+ if (s0->tcp_closed_timestamp)
+ {
+ if (now >= s0->tcp_closed_timestamp)
{
- if (now >= s0->tcp_closed_timestamp)
- {
- // session is closed, go slow path
- next0 = def_slow;
- }
- else
- {
- // session in transitory timeout, drop
- b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TCP_CLOSED];
- next0 = NAT_NEXT_DROP;
- }
- goto trace0;
+ // session is closed, go slow path, freed in slow path
+ next[0] = def_slow;
}
-
- // drop if session expired
- u64 sess_timeout_time;
- sess_timeout_time = s0->last_heard +
- (f64) nat44_session_get_timeout (sm, s0);
- if (now >= sess_timeout_time)
+ else
{
- nat_free_session_data (sm, s0, thread_index, 0);
- nat_ed_session_delete (sm, s0, thread_index, 1);
- // session is closed, go slow path
- next0 = def_slow;
- goto trace0;
+ // session in transitory timeout, drop
+ b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TCP_CLOSED];
+ next[0] = NAT_NEXT_DROP;
}
+ goto trace0;
+ }
- b0->flags |= VNET_BUFFER_F_IS_NATED;
+ // drop if session expired
+ u64 sess_timeout_time;
+ sess_timeout_time =
+ s0->last_heard + (f64) nat44_session_get_timeout (sm, s0);
+ if (now >= sess_timeout_time)
+ {
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat_ed_session_delete (sm, s0, thread_index, 1);
+ // session is closed, go slow path
+ next[0] = def_slow;
+ goto trace0;
+ }
- if (!is_output_feature)
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
+ b0->flags |= VNET_BUFFER_F_IS_NATED;
- old_addr0 = ip0->src_address.as_u32;
- new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- src_address);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
- s0->ext_host_addr.as_u32, ip4_header_t,
- dst_address);
- ip0->checksum = ip_csum_fold (sum0);
+ if (!is_output_feature)
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
- old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
+ old_addr0 = ip0->src_address.as_u32;
+ new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
+ sum0 = ip0->checksum;
+ sum0 =
+ ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ src_address);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ sum0 =
+ ip_csum_update (sum0, ip0->dst_address.as_u32,
+ s0->ext_host_addr.as_u32, ip4_header_t,
+ dst_address);
+ ip0->checksum = ip_csum_fold (sum0);
- if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
- {
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- new_port0 = udp0->src_port = s0->out2in.port;
- sum0 = tcp0->checksum;
- sum0 =
- ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t, dst_address);
- sum0 =
- ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t, length);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- sum0 =
- ip_csum_update (sum0, ip0->dst_address.as_u32,
- s0->ext_host_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 =
- ip_csum_update (sum0,
- vnet_buffer (b0)->ip.
- reass.l4_dst_port, s0->ext_host_port,
- ip4_header_t, length);
- tcp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
- }
- mss_clamping (sm->mss_clamping, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold (sum0);
- }
- tcp_packets++;
- if (nat44_set_tcp_session_state_i2o
- (sm, now, s0, b0, thread_index))
- goto trace0;
- }
- else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
- && udp0->checksum)
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
+
+ if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
new_port0 = udp0->src_port = s0->out2in.port;
- sum0 = udp0->checksum;
+ sum0 = tcp0->checksum;
sum0 =
ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
dst_address);
length);
if (PREDICT_FALSE (is_twice_nat_session (s0)))
{
- sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
- s0->ext_host_addr.as_u32,
- ip4_header_t, dst_address);
+ sum0 =
+ ip_csum_update (sum0, ip0->dst_address.as_u32,
+ s0->ext_host_addr.as_u32, ip4_header_t,
+ dst_address);
sum0 =
ip_csum_update (sum0,
vnet_buffer (b0)->ip.reass.l4_dst_port,
s0->ext_host_port, ip4_header_t, length);
- udp0->dst_port = s0->ext_host_port;
+ tcp0->dst_port = s0->ext_host_port;
ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
}
- udp0->checksum = ip_csum_fold (sum0);
- udp_packets++;
+ mss_clamping (sm->mss_clamping, tcp0, &sum0);
+ tcp0->checksum = ip_csum_fold (sum0);
}
- else
+ vlib_increment_simple_counter (&sm->counters.fastpath.in2out_ed.tcp,
+ thread_index, sw_if_index0, 1);
+ if (nat44_set_tcp_session_state_i2o (sm, now, s0, b0, thread_index))
+ goto trace0;
+ }
+ else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
+ && udp0->checksum)
+ {
+ new_port0 = udp0->src_port = s0->out2in.port;
+ sum0 = udp0->checksum;
+ sum0 =
+ ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ sum0 =
+ ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, length);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ {
+ sum0 =
+ ip_csum_update (sum0, ip0->dst_address.as_u32,
+ s0->ext_host_addr.as_u32, ip4_header_t,
+ dst_address);
+ sum0 =
+ ip_csum_update (sum0, vnet_buffer (b0)->ip.reass.l4_dst_port,
+ s0->ext_host_port, ip4_header_t, length);
+ udp0->dst_port = s0->ext_host_port;
+ ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
+ }
+ udp0->checksum = ip_csum_fold (sum0);
+ vlib_increment_simple_counter (&sm->counters.fastpath.in2out_ed.udp,
+ thread_index, sw_if_index0, 1);
+ }
+ else
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
+ new_port0 = udp0->src_port = s0->out2in.port;
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
{
- new_port0 = udp0->src_port = s0->out2in.port;
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- udp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
- }
- udp_packets++;
+ udp0->dst_port = s0->ext_host_port;
+ ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
}
+ vlib_increment_simple_counter (&sm->counters.fastpath.
+ in2out_ed.udp, thread_index,
+ sw_if_index0, 1);
}
+ }
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain
- (vm, b0), thread_index);
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm, b0),
+ thread_index);
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s0, thread_index);
- trace0:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat_in2out_ed_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->is_slow_path = 0;
-
- if (s0)
- t->session_index = s0 - tsm->sessions;
- else
- t->session_index = ~0;
- }
+ trace0:
+ if (PREDICT_FALSE
+ ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat_in2out_ed_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next[0];
+ t->is_slow_path = 0;
+
+ if (s0)
+ t->session_index = s0 - tsm->sessions;
+ else
+ t->session_index = ~0;
+ }
- pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next;
- /* 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);
+ if (next[0] == NAT_NEXT_DROP)
+ {
+ vlib_increment_simple_counter (&sm->counters.fastpath.
+ in2out_ed.drops, thread_index,
+ sw_if_index0, 1);
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ n_left_from--;
+ next++;
}
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_IN2OUT_ED_ERROR_IN2OUT_PACKETS,
- pkts_processed);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_IN2OUT_ED_ERROR_TCP_PACKETS, tcp_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_IN2OUT_ED_ERROR_UDP_PACKETS, udp_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_IN2OUT_ED_ERROR_ICMP_PACKETS,
- icmp_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_IN2OUT_ED_ERROR_OTHER_PACKETS,
- other_packets);
+ vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
+ frame->n_vectors);
return frame->n_vectors;
}
vlib_frame_t * frame,
int is_output_feature)
{
- u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
- nat_next_t next_index;
+ u32 n_left_from, *from;
snat_main_t *sm = &snat_main;
f64 now = vlib_time_now (vm);
u32 thread_index = vm->thread_index;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets = 0;
-
- stats_node_index = sm->ed_in2out_slowpath_node_index;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
+
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
+ vlib_get_buffers (vm, from, b, n_left_from);
while (n_left_from > 0)
{
- u32 n_left_to_next;
+ vlib_buffer_t *b0;
+ u32 sw_if_index0, rx_fib_index0, proto0, new_addr0, old_addr0,
+ iph_offset0 = 0;
+ u16 old_port0, new_port0;
+ ip4_header_t *ip0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ icmp46_header_t *icmp0;
+ snat_session_t *s0 = 0;
+ clib_bihash_kv_16_8_t kv0, value0;
+ ip_csum_t sum0;
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ b0 = *b;
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0,
- new_addr0, old_addr0;
- u16 old_port0, new_port0;
- ip4_header_t *ip0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- icmp46_header_t *icmp0;
- snat_session_t *s0 = 0;
- clib_bihash_kv_16_8_t kv0, value0;
- ip_csum_t sum0;
-
- /* 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_output_feature)
+ iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
- if (is_output_feature)
- iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
+ next[0] = vnet_buffer2 (b0)->nat.arc_next;
+
+ ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
+ iph_offset0);
- next0 = vnet_buffer2 (b0)->nat.arc_next;
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index0);
- ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
- iph_offset0);
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next[0] = NAT_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 =
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
+ proto0 = ip_proto_to_nat_proto (ip0->protocol);
- if (PREDICT_FALSE (ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = NAT_NEXT_ICMP_ERROR;
- goto trace0;
- }
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
+ {
+ s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0,
+ rx_fib_index0,
+ thread_index, now, vm, node);
+ if (!s0)
+ next[0] = NAT_NEXT_DROP;
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
- proto0 = ip_proto_to_nat_proto (ip0->protocol);
+ vlib_increment_simple_counter (&sm->counters.slowpath.
+ in2out_ed.other, thread_index,
+ sw_if_index0, 1);
+ goto trace0;
+ }
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
- {
- s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0,
- rx_fib_index0,
- thread_index, now,
- vm, node);
- if (!s0)
- next0 = NAT_NEXT_DROP;
-
- other_packets++;
- goto trace0;
- }
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
+ {
+ next[0] =
+ icmp_in2out_ed_slow_path (sm, b0, ip0, icmp0, sw_if_index0,
+ rx_fib_index0, node, next[0], now,
+ thread_index, &s0);
+ vlib_increment_simple_counter (&sm->counters.slowpath.
+ in2out_ed.icmp, thread_index,
+ sw_if_index0, 1);
+ goto trace0;
+ }
+
+ init_ed_k (&kv0, ip0->src_address,
+ vnet_buffer (b0)->ip.reass.l4_src_port, ip0->dst_address,
+ vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
+ ip0->protocol);
+ if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
+ {
+ ASSERT (thread_index == ed_value_get_thread_index (&value0));
+ s0 =
+ pool_elt_at_index (tsm->sessions,
+ ed_value_get_session_index (&value0));
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
+ if (s0->tcp_closed_timestamp && now >= s0->tcp_closed_timestamp)
{
- next0 = icmp_in2out_ed_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0,
- node, next0, now, thread_index, &s0);
- icmp_packets++;
- goto trace0;
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat_ed_session_delete (sm, s0, thread_index, 1);
+ s0 = NULL;
}
+ }
- init_ed_k (&kv0, ip0->src_address,
- vnet_buffer (b0)->ip.reass.l4_src_port, ip0->dst_address,
- vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
- ip0->protocol);
- if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
+ if (!s0)
+ {
+ if (is_output_feature)
{
- ASSERT (thread_index == ed_value_get_thread_index (&value0));
- s0 =
- pool_elt_at_index (tsm->sessions,
- ed_value_get_session_index (&value0));
+ if (PREDICT_FALSE
+ (nat44_ed_not_translate_output_feature
+ (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port,
+ vnet_buffer (b0)->ip.reass.l4_dst_port, thread_index,
+ sw_if_index0, vnet_buffer (b0)->sw_if_index[VLIB_TX])))
+ goto trace0;
- if (s0->tcp_closed_timestamp && now >= s0->tcp_closed_timestamp)
- {
- nat_free_session_data (sm, s0, thread_index, 0);
- nat_ed_session_delete (sm, s0, thread_index, 1);
- s0 = NULL;
- }
+ /*
+ * Send DHCP packets to the ipv4 stack, or we won't
+ * be able to use dhcp client on the outside interface
+ */
+ if (PREDICT_FALSE
+ (proto0 == NAT_PROTOCOL_UDP
+ && (vnet_buffer (b0)->ip.reass.l4_dst_port ==
+ clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_server))
+ && ip0->dst_address.as_u32 == 0xffffffff))
+ goto trace0;
}
-
- if (!s0)
+ else
{
- if (is_output_feature)
- {
- if (PREDICT_FALSE
- (nat44_ed_not_translate_output_feature
- (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port,
- vnet_buffer (b0)->ip.reass.l4_dst_port, thread_index,
- sw_if_index0,
- vnet_buffer (b0)->sw_if_index[VLIB_TX])))
- goto trace0;
-
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (PREDICT_FALSE
- (proto0 == NAT_PROTOCOL_UDP
- && (vnet_buffer (b0)->ip.reass.l4_dst_port ==
- clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_server))
- && ip0->dst_address.as_u32 == 0xffffffff))
- goto trace0;
- }
- else
- {
- if (PREDICT_FALSE
- (nat44_ed_not_translate
- (sm, node, sw_if_index0, ip0, proto0, rx_fib_index0,
- thread_index)))
- goto trace0;
- }
+ if (PREDICT_FALSE
+ (nat44_ed_not_translate
+ (sm, node, sw_if_index0, ip0, proto0, rx_fib_index0,
+ thread_index)))
+ goto trace0;
+ }
- next0 =
- slow_path_ed (sm, b0, ip0->src_address, ip0->dst_address,
- vnet_buffer (b0)->ip.reass.l4_src_port,
- vnet_buffer (b0)->ip.reass.l4_dst_port,
- ip0->protocol, rx_fib_index0, &s0, node, next0,
- thread_index, now);
+ next[0] =
+ slow_path_ed (sm, b0, ip0->src_address, ip0->dst_address,
+ vnet_buffer (b0)->ip.reass.l4_src_port,
+ vnet_buffer (b0)->ip.reass.l4_dst_port,
+ ip0->protocol, rx_fib_index0, &s0, node, next[0],
+ thread_index, now);
- if (PREDICT_FALSE (next0 == NAT_NEXT_DROP))
- goto trace0;
+ if (PREDICT_FALSE (next[0] == NAT_NEXT_DROP))
+ goto trace0;
- if (PREDICT_FALSE (!s0))
- goto trace0;
+ if (PREDICT_FALSE (!s0))
+ goto trace0;
- }
+ }
- b0->flags |= VNET_BUFFER_F_IS_NATED;
+ b0->flags |= VNET_BUFFER_F_IS_NATED;
- if (!is_output_feature)
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
+ if (!is_output_feature)
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
- old_addr0 = ip0->src_address.as_u32;
- new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- src_address);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
- s0->ext_host_addr.as_u32, ip4_header_t,
- dst_address);
- ip0->checksum = ip_csum_fold (sum0);
+ old_addr0 = ip0->src_address.as_u32;
+ new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ src_address);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
+ s0->ext_host_addr.as_u32, ip4_header_t,
+ dst_address);
+ ip0->checksum = ip_csum_fold (sum0);
- old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
- if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
- {
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- new_port0 = udp0->src_port = s0->out2in.port;
- sum0 = tcp0->checksum;
- sum0 =
- ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t, dst_address);
- sum0 =
- ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t, length);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- sum0 =
- ip_csum_update (sum0, ip0->dst_address.as_u32,
- s0->ext_host_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 =
- ip_csum_update (sum0,
- vnet_buffer (b0)->ip.
- reass.l4_dst_port, s0->ext_host_port,
- ip4_header_t, length);
- tcp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
- }
- mss_clamping (sm->mss_clamping, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold (sum0);
- }
- tcp_packets++;
- if (nat44_set_tcp_session_state_i2o
- (sm, now, s0, b0, thread_index))
- goto trace0;
- }
- else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
- && udp0->checksum)
+ if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
new_port0 = udp0->src_port = s0->out2in.port;
- sum0 = udp0->checksum;
+ sum0 = tcp0->checksum;
sum0 =
- ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
+ ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t, dst_address);
sum0 =
- ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
+ ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t, length);
if (PREDICT_FALSE (is_twice_nat_session (s0)))
{
- sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
- s0->ext_host_addr.as_u32,
- ip4_header_t, dst_address);
+ sum0 =
+ ip_csum_update (sum0, ip0->dst_address.as_u32,
+ s0->ext_host_addr.as_u32,
+ ip4_header_t, dst_address);
sum0 =
ip_csum_update (sum0,
vnet_buffer (b0)->ip.reass.l4_dst_port,
s0->ext_host_port, ip4_header_t, length);
- udp0->dst_port = s0->ext_host_port;
+ tcp0->dst_port = s0->ext_host_port;
ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
}
- udp0->checksum = ip_csum_fold (sum0);
- udp_packets++;
+ mss_clamping (sm->mss_clamping, tcp0, &sum0);
+ tcp0->checksum = ip_csum_fold (sum0);
}
- else
+ vlib_increment_simple_counter (&sm->counters.slowpath.in2out_ed.tcp,
+ thread_index, sw_if_index0, 1);
+ if (nat44_set_tcp_session_state_i2o (sm, now, s0, b0, thread_index))
+ goto trace0;
+ }
+ else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
+ && udp0->checksum)
+ {
+ new_port0 = udp0->src_port = s0->out2in.port;
+ sum0 = udp0->checksum;
+ sum0 =
+ ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ sum0 =
+ ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, length);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ {
+ sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
+ s0->ext_host_addr.as_u32,
+ ip4_header_t, dst_address);
+ sum0 =
+ ip_csum_update (sum0,
+ vnet_buffer (b0)->ip.reass.l4_dst_port,
+ s0->ext_host_port, ip4_header_t, length);
+ udp0->dst_port = s0->ext_host_port;
+ ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
+ }
+ udp0->checksum = ip_csum_fold (sum0);
+ vlib_increment_simple_counter (&sm->counters.slowpath.in2out_ed.udp,
+ thread_index, sw_if_index0, 1);
+ }
+ else
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
+ new_port0 = udp0->src_port = s0->out2in.port;
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
{
- new_port0 = udp0->src_port = s0->out2in.port;
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- udp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
- }
- udp_packets++;
+ udp0->dst_port = s0->ext_host_port;
+ ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
}
+ vlib_increment_simple_counter (&sm->counters.slowpath.
+ in2out_ed.udp, thread_index,
+ sw_if_index0, 1);
}
+ }
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain
- (vm, b0), thread_index);
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
-
- trace0:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat_in2out_ed_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->is_slow_path = 1;
-
- if (s0)
- t->session_index = s0 - tsm->sessions;
- else
- t->session_index = ~0;
- }
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain
+ (vm, b0), thread_index);
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s0, thread_index);
- pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next;
+ trace0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat_in2out_ed_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next[0];
+ t->is_slow_path = 1;
+
+ if (s0)
+ t->session_index = s0 - tsm->sessions;
+ else
+ t->session_index = ~0;
+ }
- /* 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);
+ if (next[0] == NAT_NEXT_DROP)
+ {
+ vlib_increment_simple_counter (&sm->counters.slowpath.
+ in2out_ed.drops, thread_index,
+ sw_if_index0, 1);
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ n_left_from--;
+ next++;
+ b++;
}
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_IN2OUT_ED_ERROR_IN2OUT_PACKETS,
- pkts_processed);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_IN2OUT_ED_ERROR_TCP_PACKETS, tcp_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_IN2OUT_ED_ERROR_UDP_PACKETS, udp_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_IN2OUT_ED_ERROR_ICMP_PACKETS,
- icmp_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_IN2OUT_ED_ERROR_OTHER_PACKETS,
- other_packets);
+ vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
+ frame->n_vectors);
+
return frame->n_vectors;
}
Code Review / vpp.git / blobdiff