#undef _
};
+typedef struct
+{
+ ip4_address_t addr;
+ u16 port;
+ u32 fib_index;
+ u32 session_index;
+} nat_hairpin_trace_t;
+
+static u8 *
+format_nat_hairpin_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 *);
+ nat_hairpin_trace_t *t = va_arg (*args, nat_hairpin_trace_t *);
+
+ s =
+ format (s, "new dst addr %U port %u fib-index %u", format_ip4_address,
+ &t->addr, clib_net_to_host_u16 (t->port), t->fib_index);
+ if (~0 == t->session_index)
+ {
+ s = format (s, " is-static-mapping");
+ }
+ else
+ {
+ s = format (s, " session-index %u", t->session_index);
+ }
+
+ return s;
+}
+
extern vnet_feature_arc_registration_t vnet_feat_arc_ip4_local;
static_always_inline int
#ifndef CLIB_MARCH_VARIANT
int
-snat_hairpinning (snat_main_t * sm,
- vlib_buffer_t * b0,
- ip4_header_t * ip0,
- udp_header_t * udp0,
- tcp_header_t * tcp0, u32 proto0, int is_ed)
+snat_hairpinning (vlib_main_t * vm, vlib_node_runtime_t * node,
+ snat_main_t * sm, vlib_buffer_t * b0, ip4_header_t * ip0,
+ udp_header_t * udp0, tcp_header_t * tcp0, u32 proto0,
+ int is_ed, int do_trace)
{
snat_session_key_t key0, sm0;
- snat_session_t *s0;
+ snat_session_t *s0 = NULL;
clib_bihash_kv_8_8_t kv0, value0;
ip_csum_t sum0;
- u32 new_dst_addr0 = 0, old_dst_addr0, ti = 0, si;
- u16 new_dst_port0, old_dst_port0;
+ u32 new_dst_addr0 = 0, old_dst_addr0, ti = 0, si = ~0;
+ u16 new_dst_port0 = ~0, old_dst_port0;
int rv;
key0.addr = ip0->dst_address;
if (is_ed)
{
clib_bihash_kv_16_8_t ed_kv, ed_value;
- make_ed_kv (&ed_kv, &ip0->dst_address, &ip0->src_address,
+ make_ed_kv (&ip0->dst_address, &ip0->src_address,
ip0->protocol, sm->outside_fib_index, udp0->dst_port,
- udp0->src_port);
- rv = clib_bihash_search_16_8 (&sm->per_thread_data[ti].out2in_ed,
- &ed_kv, &ed_value);
- si = ed_value.value;
+ udp0->src_port, ~0, ~0, &ed_kv);
+ rv = clib_bihash_search_16_8 (&sm->out2in_ed, &ed_kv, &ed_value);
+ ASSERT (ti == ed_value_get_thread_index (&ed_value));
+ si = ed_value_get_session_index (&ed_value);
}
else
{
si = value0.value;
}
if (rv)
- return 0;
+ {
+ rv = 0;
+ goto trace;
+ }
s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si);
new_dst_addr0 = s0->in2out.addr.as_u32;
old_dst_port0 = tcp0->dst;
if (PREDICT_TRUE (new_dst_port0 != old_dst_port0))
{
- if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
{
tcp0->dst = new_dst_port0;
sum0 = tcp0->checksum;
}
else
{
- if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
{
sum0 = tcp0->checksum;
sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
tcp0->checksum = ip_csum_fold (sum0);
}
}
- return 1;
+ rv = 1;
+ goto trace;
}
- return 0;
+ rv = 0;
+trace:
+ if (do_trace && PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat_hairpin_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->addr.as_u32 = new_dst_addr0;
+ t->port = new_dst_port0;
+ t->fib_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+ if (s0)
+ {
+ t->session_index = si;
+ }
+ else
+ {
+ t->session_index = ~0;
+ }
+ }
+ return rv;
}
#endif
inner_ip0 = (ip4_header_t *) ((icmp_echo_header_t *) (icmp0 + 1) + 1);
l4_header = ip4_next_header (inner_ip0);
- u32 protocol = ip_proto_to_snat_proto (inner_ip0->protocol);
+ u32 protocol = ip_proto_to_nat_proto (inner_ip0->protocol);
- if (protocol != SNAT_PROTOCOL_TCP && protocol != SNAT_PROTOCOL_UDP)
+ if (protocol != NAT_PROTOCOL_TCP && protocol != NAT_PROTOCOL_UDP)
return 1;
if (is_ed)
{
clib_bihash_kv_16_8_t ed_kv, ed_value;
- make_ed_kv (&ed_kv, &ip0->dst_address, &ip0->src_address,
+ make_ed_kv (&ip0->dst_address, &ip0->src_address,
inner_ip0->protocol, sm->outside_fib_index,
- l4_header->src_port, l4_header->dst_port);
- if (clib_bihash_search_16_8 (&sm->per_thread_data[ti].out2in_ed,
- &ed_kv, &ed_value))
+ l4_header->src_port, l4_header->dst_port, ~0, ~0,
+ &ed_kv);
+ if (clib_bihash_search_16_8 (&sm->out2in_ed, &ed_kv, &ed_value))
return 1;
- si = ed_value.value;
+ ASSERT (ti == ed_value_get_thread_index (&ed_value));
+ si = ed_value_get_session_index (&ed_value);
}
else
{
u16 icmp_id0 = echo0->identifier;
key0.addr = ip0->dst_address;
key0.port = icmp_id0;
- key0.protocol = SNAT_PROTOCOL_ICMP;
+ key0.protocol = NAT_PROTOCOL_ICMP;
key0.fib_index = sm->outside_fib_index;
kv0.key = key0.as_u64;
if (sm->num_workers > 1)
snat_static_mapping_t *m;
ip_csum_t sum;
snat_session_t *s;
- snat_main_per_thread_data_t *tsm;
if (sm->num_workers > 1)
ti = sm->worker_out2in_cb (b, ip, sm->outside_fib_index, 0);
else
ti = sm->num_workers;
- tsm = &sm->per_thread_data[ti];
old_addr = ip->dst_address.as_u32;
- make_ed_kv (&s_kv, &ip->dst_address, &ip->src_address, ip->protocol,
- sm->outside_fib_index, 0, 0);
- if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
+ make_ed_kv (&ip->dst_address, &ip->src_address, ip->protocol,
+ sm->outside_fib_index, 0, 0, ~0, ~0, &s_kv);
+ if (clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value))
{
make_sm_kv (&kv, &ip->dst_address, 0, 0, 0);
if (clib_bihash_search_8_8
}
else
{
- s = pool_elt_at_index (sm->per_thread_data[ti].sessions, s_value.value);
+ ASSERT (ti == ed_value_get_thread_index (&s_value));
+ s =
+ pool_elt_at_index (sm->per_thread_data[ti].sessions,
+ ed_value_get_session_index (&s_value));
if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
vnet_buffer (b)->sw_if_index[VLIB_TX] = s->in2out.fib_index;
new_addr = ip->dst_address.as_u32 = s->in2out.addr.as_u32;
}
#endif
-#ifndef CLIB_MARCH_VARIANT
-void
-nat44_reass_hairpinning (snat_main_t * sm,
- vlib_buffer_t * b0,
- ip4_header_t * ip0,
- u16 sport, u16 dport, u32 proto0, int is_ed)
-{
- snat_session_key_t key0, sm0;
- snat_session_t *s0;
- clib_bihash_kv_8_8_t kv0, value0;
- ip_csum_t sum0;
- u32 new_dst_addr0 = 0, old_dst_addr0, ti = 0, si;
- u16 new_dst_port0, old_dst_port0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- int rv;
-
- key0.addr = ip0->dst_address;
- key0.port = dport;
- key0.protocol = proto0;
- key0.fib_index = sm->outside_fib_index;
- kv0.key = key0.as_u64;
-
- udp0 = ip4_next_header (ip0);
-
- /* Check if destination is static mappings */
- if (!snat_static_mapping_match (sm, key0, &sm0, 1, 0, 0, 0, 0, 0))
- {
- new_dst_addr0 = sm0.addr.as_u32;
- new_dst_port0 = sm0.port;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
- }
- /* or active sessions */
- else
- {
- if (sm->num_workers > 1)
- ti =
- (clib_net_to_host_u16 (udp0->dst_port) -
- 1024) / sm->port_per_thread;
- else
- ti = sm->num_workers;
-
- if (is_ed)
- {
- clib_bihash_kv_16_8_t ed_kv, ed_value;
- make_ed_kv (&ed_kv, &ip0->dst_address, &ip0->src_address,
- ip0->protocol, sm->outside_fib_index, udp0->dst_port,
- udp0->src_port);
- rv = clib_bihash_search_16_8 (&sm->per_thread_data[ti].out2in_ed,
- &ed_kv, &ed_value);
- si = ed_value.value;
- }
- else
- {
- rv = clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0,
- &value0);
- si = value0.value;
- }
- if (!rv)
- {
- s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si);
- new_dst_addr0 = s0->in2out.addr.as_u32;
- new_dst_port0 = s0->in2out.port;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
- }
- }
-
- /* Destination is behind the same NAT, use internal address and port */
- if (new_dst_addr0)
- {
- old_dst_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address.as_u32 = new_dst_addr0;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
- ip4_header_t, dst_address);
- ip0->checksum = ip_csum_fold (sum0);
-
- old_dst_port0 = dport;
- if (PREDICT_TRUE (new_dst_port0 != old_dst_port0 &&
- ip4_is_first_fragment (ip0)))
- {
- if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
- {
- tcp0 = ip4_next_header (ip0);
- tcp0->dst = new_dst_port0;
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
- ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, old_dst_port0, new_dst_port0,
- ip4_header_t /* cheat */ , length);
- tcp0->checksum = ip_csum_fold (sum0);
- }
- else
- {
- udp0->dst_port = new_dst_port0;
- udp0->checksum = 0;
- }
- }
- else
- {
- if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
- {
- tcp0 = ip4_next_header (ip0);
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
- ip4_header_t, dst_address);
- tcp0->checksum = ip_csum_fold (sum0);
- }
- }
- }
-}
-#endif
-
static inline uword
nat44_hairpinning_fn_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
udp0 = ip4_next_header (ip0);
tcp0 = (tcp_header_t *) udp0;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
+ proto0 = ip_proto_to_nat_proto (ip0->protocol);
vnet_get_config_data (&cm->config_main, &b0->current_config_index,
&next0, 0);
- if (snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0, is_ed))
+ if (snat_hairpinning
+ (vm, node, sm, b0, ip0, udp0, tcp0, proto0, is_ed,
+ 1 /* do_trace */ ))
next0 = NAT_HAIRPIN_NEXT_LOOKUP;
pkts_processed += next0 != NAT_HAIRPIN_NEXT_DROP;
.vector_size = sizeof (u32),
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN(nat44_hairpin_error_strings),
+ .format_trace = format_nat_hairpin_trace,
.error_strings = nat44_hairpin_error_strings,
.n_next_nodes = NAT_HAIRPIN_N_NEXT,
.next_nodes = {
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN(nat44_hairpin_error_strings),
.error_strings = nat44_hairpin_error_strings,
+ .format_trace = format_nat_hairpin_trace,
.n_next_nodes = NAT_HAIRPIN_N_NEXT,
.next_nodes = {
[NAT_HAIRPIN_NEXT_DROP] = "error-drop",
next0 = NAT_HAIRPIN_NEXT_LOOKUP;
ip0 = vlib_buffer_get_current (b0);
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
+ proto0 = ip_proto_to_nat_proto (ip0->protocol);
vnet_buffer (b0)->snat.flags = 0;
if (PREDICT_FALSE (is_hairpinning (sm, &ip0->dst_address)))
{
- if (proto0 == SNAT_PROTOCOL_TCP || proto0 == SNAT_PROTOCOL_UDP)
+ if (proto0 == NAT_PROTOCOL_TCP || proto0 == NAT_PROTOCOL_UDP)
{
udp_header_t *udp0 = ip4_next_header (ip0);
tcp_header_t *tcp0 = (tcp_header_t *) udp0;
- snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0, is_ed);
+ snat_hairpinning (vm, node, sm, b0, ip0, udp0, tcp0, proto0,
+ is_ed, 1 /* do_trace */ );
}
- else if (proto0 == SNAT_PROTOCOL_ICMP)
+ else if (proto0 == NAT_PROTOCOL_ICMP)
{
icmp46_header_t *icmp0 = ip4_next_header (ip0);
.vector_size = sizeof (u32),
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN(nat44_hairpin_error_strings),
+ .format_trace = format_nat_hairpin_trace,
.error_strings = nat44_hairpin_error_strings,
.n_next_nodes = NAT_HAIRPIN_N_NEXT,
.next_nodes = {
.vector_size = sizeof (u32),
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN(nat44_hairpin_error_strings),
+ .format_trace = format_nat_hairpin_trace,
.error_strings = nat44_hairpin_error_strings,
.n_next_nodes = NAT_HAIRPIN_N_NEXT,
.next_nodes = {
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