vlib_node_registration_t nat44_ed_hairpin_dst_node;
vlib_node_registration_t nat44_ed_hairpin_src_node;
vlib_node_registration_t nat44_ed_hairpinning_node;
+vlib_node_registration_t nat44_ed_in2out_reass_node;
#define foreach_snat_in2out_error \
_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \
return next0;
}
+static inline u32
+snat_icmp_hairpinning (snat_main_t *sm,
+ vlib_buffer_t * b0,
+ ip4_header_t * ip0,
+ icmp46_header_t * icmp0,
+ int is_ed);
+
static inline u32 icmp_in2out (snat_main_t *sm,
vlib_buffer_t * b0,
ip4_header_t * ip0,
u8 dont_translate;
u32 new_addr0, old_addr0;
u16 old_id0, new_id0;
+ u16 old_checksum0, new_checksum0;
ip_csum_t sum0;
u16 checksum0;
u32 next0_tmp;
if (next0 == SNAT_IN2OUT_NEXT_DROP || dont_translate)
goto out;
- sum0 = ip_incremental_checksum (0, icmp0,
- ntohs(ip0->length) - ip4_header_bytes (ip0));
- checksum0 = ~ip_csum_fold (sum0);
- if (PREDICT_FALSE(checksum0 != 0 && checksum0 != 0xffff))
+ if (PREDICT_TRUE (!ip4_is_fragment (ip0)))
{
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
+ sum0 = ip_incremental_checksum (0, icmp0,
+ ntohs(ip0->length) - ip4_header_bytes (ip0));
+ checksum0 = ~ip_csum_fold (sum0);
+ if (PREDICT_FALSE(checksum0 != 0 && checksum0 != 0xffff))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
}
old_addr0 = ip0->src_address.as_u32;
new_addr0 = ip0->src_address.as_u32 = sm0.addr.as_u32;
- if (vnet_buffer(b0)->sw_if_index[VLIB_TX] == ~0)
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
sum0 = ip0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
goto out;
}
+ /* update inner destination IP address */
old_addr0 = inner_ip0->dst_address.as_u32;
inner_ip0->dst_address = sm0.addr;
new_addr0 = inner_ip0->dst_address.as_u32;
-
sum0 = icmp0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
dst_address /* changed member */);
icmp0->checksum = ip_csum_fold (sum0);
+ /* update inner IP header checksum */
+ old_checksum0 = inner_ip0->checksum;
+ sum0 = inner_ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address /* changed member */);
+ inner_ip0->checksum = ip_csum_fold (sum0);
+ new_checksum0 = inner_ip0->checksum;
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_checksum0, new_checksum0, ip4_header_t,
+ checksum);
+ icmp0->checksum = ip_csum_fold (sum0);
+
switch (protocol)
{
case SNAT_PROTOCOL_ICMP:
}
}
+ if (vnet_buffer(b0)->sw_if_index[VLIB_TX] == ~0)
+ {
+ if (sm->deterministic ||
+ 0 != snat_icmp_hairpinning(sm, b0, ip0, icmp0,
+ sm->endpoint_dependent))
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
+ }
+
out:
return next0;
}
return 0;
}
-static inline void
+static inline u32
snat_icmp_hairpinning (snat_main_t *sm,
vlib_buffer_t * b0,
ip4_header_t * ip0,
icmp46_header_t * icmp0,
int is_ed)
{
- snat_session_key_t key0, sm0;
+ snat_session_key_t key0;
clib_bihash_kv_8_8_t kv0, value0;
- u32 new_dst_addr0 = 0, old_dst_addr0, si, ti = 0;
+ u32 old_dst_addr0, new_dst_addr0;
+ u32 old_addr0, new_addr0;
+ u16 old_port0, new_port0;
+ u16 old_checksum0, new_checksum0;
+ u32 si, ti = 0;
ip_csum_t sum0;
snat_session_t *s0;
- int rv;
+ snat_static_mapping_t *m0;
- if (!icmp_is_error_message (icmp0))
+ if (icmp_is_error_message (icmp0))
{
- icmp_echo_header_t *echo0 = (icmp_echo_header_t *)(icmp0+1);
- u16 icmp_id0 = echo0->identifier;
- key0.addr = ip0->dst_address;
- key0.port = icmp_id0;
- key0.protocol = SNAT_PROTOCOL_ICMP;
- key0.fib_index = sm->outside_fib_index;
- kv0.key = key0.as_u64;
+ ip4_header_t *inner_ip0 = 0;
+ tcp_udp_header_t *l4_header = 0;
- if (sm->num_workers > 1)
- ti = (clib_net_to_host_u16 (icmp_id0) - 1024) / sm->port_per_thread;
- else
- ti = sm->num_workers;
+ 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);
+
+ if (protocol != SNAT_PROTOCOL_TCP && protocol != SNAT_PROTOCOL_UDP)
+ return 1;
- /* Check if destination is in active sessions */
if (is_ed)
{
clib_bihash_kv_16_8_t ed_kv, ed_value;
make_ed_kv (&ed_kv, &ip0->dst_address, &ip0->src_address,
- IP_PROTOCOL_ICMP, sm->outside_fib_index, icmp_id0, 0);
- rv = clib_bihash_search_16_8 (&sm->per_thread_data[ti].out2in_ed,
- &ed_kv, &ed_value);
+ 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))
+ return 1;
si = ed_value.value;
}
else
{
- rv = clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0,
- &value0);
+ key0.addr = ip0->dst_address;
+ key0.port = l4_header->src_port;
+ key0.protocol = protocol;
+ key0.fib_index = sm->outside_fib_index;
+ kv0.key = key0.as_u64;
+ if (clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0,
+ &value0))
+ return 1;
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;
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+
+ /* update inner source IP address */
+ old_addr0 = inner_ip0->src_address.as_u32;
+ inner_ip0->src_address.as_u32 = new_dst_addr0;
+ new_addr0 = inner_ip0->src_address.as_u32;
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ src_address);
+ icmp0->checksum = ip_csum_fold (sum0);
+
+ /* update inner IP header checksum */
+ old_checksum0 = inner_ip0->checksum;
+ sum0 = inner_ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ src_address);
+ inner_ip0->checksum = ip_csum_fold (sum0);
+ new_checksum0 = inner_ip0->checksum;
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_checksum0, new_checksum0, ip4_header_t,
+ checksum);
+ icmp0->checksum = ip_csum_fold (sum0);
+
+ /* update inner source port */
+ old_port0 = l4_header->src_port;
+ l4_header->src_port = s0->in2out.port;
+ new_port0 = l4_header->src_port;
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_port0, new_port0, tcp_udp_header_t,
+ src_port);
+ icmp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ if (!is_ed)
{
- /* or static mappings */
- if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0, 0))
+ icmp_echo_header_t *echo0 = (icmp_echo_header_t *)(icmp0+1);
+ u16 icmp_id0 = echo0->identifier;
+ key0.addr = ip0->dst_address;
+ key0.port = icmp_id0;
+ key0.protocol = SNAT_PROTOCOL_ICMP;
+ key0.fib_index = sm->outside_fib_index;
+ kv0.key = key0.as_u64;
+ if (sm->num_workers > 1)
+ ti = (clib_net_to_host_u16 (icmp_id0) - 1024) / sm->port_per_thread;
+ else
+ ti = sm->num_workers;
+ int rv = clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0,
+ &value0);
+ if (!rv)
{
- new_dst_addr0 = sm0.addr.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
+ si = value0.value;
+ s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si);
+ new_dst_addr0 = s0->in2out.addr.as_u32;
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+ echo0->identifier = s0->in2out.port;
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, icmp_id0, s0->in2out.port,
+ icmp_echo_header_t, identifier);
+ icmp0->checksum = ip_csum_fold (sum0);
+ goto change_addr;
}
- }
- else
- {
- s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si);
- new_dst_addr0 = s0->in2out.addr.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
- echo0->identifier = s0->in2out.port;
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, icmp_id0, s0->in2out.port,
- icmp_echo_header_t, identifier);
- icmp0->checksum = ip_csum_fold (sum0);
+ ti = 0;
}
- /* 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);
- }
- }
+ key0.addr = ip0->dst_address;
+ key0.port = 0;
+ key0.protocol = 0;
+ key0.fib_index = sm->outside_fib_index;
+ kv0.key = key0.as_u64;
+
+ if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv0, &value0))
+ return 1;
+
+ m0 = pool_elt_at_index (sm->static_mappings, value0.value);
+ new_dst_addr0 = m0->local_addr.as_u32;
+ if (vnet_buffer(b0)->sw_if_index[VLIB_TX] == ~0)
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = m0->fib_index;
+ }
+change_addr:
+ /* 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);
+ }
+ return 0;
}
static inline u32 icmp_in2out_slow_path (snat_main_t *sm,
snat_session_t * s0 = *p_s0;
if (PREDICT_TRUE(next0 != SNAT_IN2OUT_NEXT_DROP && s0))
{
- /* Hairpinning */
- if (vnet_buffer(b0)->sw_if_index[VLIB_TX] == 0)
- snat_icmp_hairpinning(sm, b0, ip0, icmp0, sm->endpoint_dependent);
/* Accounting */
nat44_session_update_counters (s0, now,
vlib_buffer_length_in_chain (sm->vlib_main, b0));
ip4_header_t * ip0,
u16 sport,
u16 dport,
- u32 proto0)
+ u32 proto0,
+ int is_ed)
{
snat_session_key_t key0, sm0;
snat_session_t * s0;
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;
else
ti = sm->num_workers;
- if (!clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0, &value0))
+ 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;
/* Hairpinning */
nat44_reass_hairpinning (sm, b0, ip0, s0->out2in.port,
- s0->ext_host_port, proto0);
+ s0->ext_host_port, proto0, 0);
/* Accounting */
nat44_session_update_counters (s0, now,
}
else
{
+ if (PREDICT_FALSE (proto0 == ~0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace00;
+ }
+
+ if (ip4_is_fragment (ip0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_REASS;
+ goto trace00;
+ }
+
if (is_output_feature)
{
if (PREDICT_FALSE(nat_not_translate_output_feature_fwd(
goto trace00;
}
- if (PREDICT_FALSE (proto0 == ~0 || proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace00;
- }
-
- if (ip4_is_fragment (ip0))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto trace00;
- }
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace00;
+ }
}
make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address, ip0->protocol,
}
else
{
+ if (PREDICT_FALSE (proto1 == ~0))
+ {
+ next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace01;
+ }
+
+ if (ip4_is_fragment (ip1))
+ {
+ next1 = SNAT_IN2OUT_NEXT_REASS;
+ goto trace01;
+ }
+
if (is_output_feature)
{
if (PREDICT_FALSE(nat_not_translate_output_feature_fwd(
goto trace01;
}
- if (PREDICT_FALSE (proto1 == ~0 || proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace01;
- }
-
- if (ip4_is_fragment (ip1))
- {
- b1->error = node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT];
- next1 = SNAT_IN2OUT_NEXT_DROP;
- goto trace01;
- }
+ if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
+ {
+ next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace01;
+ }
}
make_ed_kv (&kv1, &ip1->src_address, &ip1->dst_address, ip1->protocol,
}
else
{
- if (is_output_feature)
+ if (PREDICT_FALSE (proto0 == ~0))
{
- if (PREDICT_FALSE(nat_not_translate_output_feature_fwd(
- sm, ip0, thread_index, now, vm, b0)))
- goto trace0;
+ next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace0;
}
- if (PREDICT_FALSE (proto0 == ~0 || proto0 == SNAT_PROTOCOL_ICMP))
+ if (ip4_is_fragment (ip0))
{
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ next0 = SNAT_IN2OUT_NEXT_REASS;
goto trace0;
}
- if (ip4_is_fragment (ip0))
+ 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 == SNAT_PROTOCOL_ICMP))
{
- b0->error = node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT];
- next0 = SNAT_IN2OUT_NEXT_DROP;
+ next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
goto trace0;
}
}
[SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
[SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-ed-in2out-slowpath",
[SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-ed-in2out-reass",
},
};
[SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output",
[SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-ed-in2out-output-slowpath",
[SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-ed-in2out-reass-output",
},
};
[SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
[SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-ed-in2out-slowpath",
[SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-ed-in2out-reass",
},
};
[SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output",
[SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-ed-in2out-output-slowpath",
[SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-ed-in2out-reass",
},
};
VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_output_slowpath_node,
nat44_ed_in2out_output_slow_path_fn);
+static inline uword
+nat44_ed_in2out_reass_node_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame,
+ int is_output_feature)
+{
+ u32 n_left_from, *from, *to_next;
+ snat_in2out_next_t next_index;
+ u32 pkts_processed = 0;
+ snat_main_t *sm = &snat_main;
+ f64 now = vlib_time_now (vm);
+ u32 thread_index = vm->thread_index;
+ snat_main_per_thread_data_t *per_thread_data =
+ &sm->per_thread_data[thread_index];
+ u32 *fragments_to_drop = 0;
+ u32 *fragments_to_loopback = 0;
+
+ 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 > 0 && n_left_to_next > 0)
+ {
+ u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0;
+ u32 iph_offset0 = 0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ u8 cached0 = 0;
+ ip4_header_t *ip0 = 0;
+ nat_reass_ip4_t *reass0;
+ udp_header_t * udp0;
+ tcp_header_t * tcp0;
+ icmp46_header_t * icmp0;
+ clib_bihash_kv_16_8_t kv0, value0;
+ snat_session_t * s0 = 0;
+ u16 old_port0, new_port0;
+ 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);
+
+ next0 = SNAT_IN2OUT_NEXT_LOOKUP;
+
+ 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 (nat_reass_is_drop_frag(0)))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT];
+ goto trace0;
+ }
+
+ if (is_output_feature)
+ iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
+
+ ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
+ iph_offset0);
+
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
+ ip0->dst_address,
+ ip0->fragment_id,
+ ip0->protocol,
+ 1,
+ &fragments_to_drop);
+
+ if (PREDICT_FALSE (!reass0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_REASS];
+ nat_log_notice ("maximum reassemblies exceeded");
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
+ {
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE(nat_not_translate_output_feature_fwd(
+ sm, ip0, thread_index, now, vm, b0)))
+ reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
+ goto trace0;
+ }
+
+ next0 = icmp_in2out_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, now, thread_index, &s0);
+
+ if (PREDICT_TRUE(next0 != SNAT_IN2OUT_NEXT_DROP))
+ {
+ if (s0)
+ reass0->sess_index = s0 - per_thread_data->sessions;
+ else
+ reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
+ nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
+ }
+
+ goto trace0;
+ }
+
+ make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address, ip0->protocol,
+ rx_fib_index0, udp0->src_port, udp0->dst_port);
+
+ if (clib_bihash_search_16_8 (&per_thread_data->in2out_ed, &kv0, &value0))
+ {
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE(nat44_ed_not_translate_output_feature(
+ sm, ip0, ip0->protocol, udp0->src_port,
+ udp0->dst_port, thread_index, sw_if_index0,
+ vnet_buffer(b0)->sw_if_index[VLIB_TX])))
+ {
+ reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
+ nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
+ goto trace0;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE(nat44_ed_not_translate(sm, node,
+ sw_if_index0, ip0, proto0, rx_fib_index0,
+ thread_index)))
+ {
+ reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
+ nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
+ goto trace0;
+ }
+ }
+
+ next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0,
+ &s0, node, next0, thread_index, now);
+
+ if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
+ goto trace0;
+
+ reass0->sess_index = s0 - per_thread_data->sessions;
+ }
+ else
+ {
+ s0 = pool_elt_at_index (per_thread_data->sessions,
+ value0.value);
+ reass0->sess_index = value0.value;
+ }
+ nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
+ }
+ else
+ {
+ if (reass0->flags & NAT_REASS_FLAG_ED_DONT_TRANSLATE)
+ goto trace0;
+ if (PREDICT_FALSE (reass0->sess_index == (u32) ~0))
+ {
+ if (nat_ip4_reass_add_fragment (reass0, bi0, &fragments_to_drop))
+ {
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_FRAG];
+ nat_log_notice ("maximum fragments per reassembly exceeded");
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto trace0;
+ }
+ cached0 = 1;
+ goto trace0;
+ }
+ s0 = pool_elt_at_index (per_thread_data->sessions,
+ reass0->sess_index);
+ }
+
+ old_addr0 = ip0->src_address.as_u32;
+ ip0->src_address = s0->out2in.addr;
+ new_addr0 = ip0->src_address.as_u32;
+ if (!is_output_feature)
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
+
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ src_address /* changed member */);
+ 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_FALSE (ip4_is_first_fragment (ip0)))
+ {
+ if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->src_port;
+ tcp0->src_port = s0->out2in.port;
+ new_port0 = tcp0->src_port;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */);
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */,
+ length /* changed member */);
+ 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, tcp0->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;
+ }
+ tcp0->checksum = ip_csum_fold(sum0);
+ }
+ else
+ {
+ old_port0 = udp0->src_port;
+ udp0->src_port = s0->out2in.port;
+ udp0->checksum = 0;
+ 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;
+ }
+ }
+ }
+
+ /* Hairpinning */
+ if (PREDICT_TRUE(proto0 != SNAT_PROTOCOL_ICMP))
+ nat44_reass_hairpinning (sm, b0, ip0, s0->out2in.port,
+ s0->ext_host_port, proto0, 1);
+ else
+ snat_icmp_hairpinning(sm, b0, ip0, icmp0, 1);
+
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm, b0));
+ /* 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)))
+ {
+ nat44_in2out_reass_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->cached = cached0;
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ }
+
+ if (cached0)
+ {
+ n_left_to_next++;
+ to_next--;
+ }
+ else
+ {
+ pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
+
+ /* 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 (n_left_from == 0 && vec_len (fragments_to_loopback))
+ {
+ from = vlib_frame_vector_args (frame);
+ u32 len = vec_len (fragments_to_loopback);
+ if (len <= VLIB_FRAME_SIZE)
+ {
+ clib_memcpy (from, fragments_to_loopback, sizeof (u32) * len);
+ n_left_from = len;
+ vec_reset_length (fragments_to_loopback);
+ }
+ else
+ {
+ clib_memcpy (from,
+ fragments_to_loopback + (len - VLIB_FRAME_SIZE),
+ sizeof (u32) * VLIB_FRAME_SIZE);
+ n_left_from = VLIB_FRAME_SIZE;
+ _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
+ }
+ }
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ vlib_node_increment_counter (vm, nat44_in2out_reass_node.index,
+ SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
+ pkts_processed);
+
+ nat_send_all_to_node (vm, fragments_to_drop, node,
+ &node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT],
+ SNAT_IN2OUT_NEXT_DROP);
+
+ vec_free (fragments_to_drop);
+ vec_free (fragments_to_loopback);
+ return frame->n_vectors;
+}
+
+static uword
+nat44_ed_in2out_reass_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat44_ed_in2out_reass_node_fn_inline (vm, node, frame, 0);
+}
+
+VLIB_REGISTER_NODE (nat44_ed_in2out_reass_node) = {
+ .function = nat44_ed_in2out_reass_node_fn,
+ .name = "nat44-ed-in2out-reass",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_in2out_reass_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(snat_in2out_error_strings),
+ .error_strings = snat_in2out_error_strings,
+
+ .n_next_nodes = SNAT_IN2OUT_N_NEXT,
+ .next_nodes = {
+ [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
+ [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
+ [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
+ [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-ed-in2out-reass",
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_reass_node,
+ nat44_ed_in2out_reass_node_fn);
+
+static uword
+nat44_ed_in2out_reass_output_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat44_ed_in2out_reass_node_fn_inline (vm, node, frame, 1);
+}
+
+VLIB_REGISTER_NODE (nat44_ed_in2out_reass_output_node) = {
+ .function = nat44_ed_in2out_reass_output_node_fn,
+ .name = "nat44-ed-in2out-reass-output",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_in2out_reass_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(snat_in2out_error_strings),
+ .error_strings = snat_in2out_error_strings,
+
+ .n_next_nodes = SNAT_IN2OUT_N_NEXT,
+ .next_nodes = {
+ [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
+ [SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output",
+ [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
+ [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-ed-in2out-reass",
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_reass_output_node,
+ nat44_ed_in2out_reass_output_node_fn);
+
/**************************/
/*** deterministic mode ***/
/**************************/
Code Review / vpp.git / blobdiff