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-rw-r--r--src/plugins/snat/in2out.c381
-rw-r--r--src/plugins/snat/out2in.c426
-rw-r--r--src/plugins/snat/snat.c8
-rw-r--r--src/plugins/snat/snat.h57
4 files changed, 558 insertions, 314 deletions
diff --git a/src/plugins/snat/in2out.c b/src/plugins/snat/in2out.c
index 4abf8758af4..b4961365309 100644
--- a/src/plugins/snat/in2out.c
+++ b/src/plugins/snat/in2out.c
@@ -415,61 +415,23 @@ static u32 slow_path (snat_main_t *sm, vlib_buffer_t *b0,
s->in2out.fib_index);
return next0;
}
-
-typedef struct {
- u16 src_port, dst_port;
-} tcp_udp_header_t;
-static inline u32 icmp_in2out_slow_path (snat_main_t *sm,
- vlib_buffer_t * b0,
- ip4_header_t * ip0,
- icmp46_header_t * icmp0,
- u32 sw_if_index0,
- u32 rx_fib_index0,
- vlib_node_runtime_t * node,
- u32 next0,
- f64 now,
- u32 cpu_index,
- snat_session_t ** p_s0)
+static_always_inline
+snat_in2out_error_t icmp_get_key(icmp46_header_t *icmp0,
+ snat_session_key_t *p_key0)
{
snat_session_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;
- clib_bihash_kv_8_8_t kv0, value0;
- snat_session_t * s0 = 0;
- u32 new_addr0, old_addr0;
- u16 old_id0, new_id0;
- ip_csum_t sum0;
- u16 checksum0;
- snat_runtime_t * rt = (snat_runtime_t *)node->runtime_data;
- u8 is_error_message = 0;
echo0 = (icmp_echo_header_t *)(icmp0+1);
- key0.addr = ip0->src_address;
- key0.fib_index = rx_fib_index0;
-
- switch(icmp0->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:
- is_error_message = 1;
- }
-
- if (!is_error_message)
+ if (!icmp_is_error_message (icmp0))
{
if (PREDICT_FALSE(icmp0->type != ICMP4_echo_request))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
+ return SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE;
key0.protocol = SNAT_PROTOCOL_ICMP;
key0.port = echo0->identifier;
}
@@ -490,21 +452,72 @@ static inline u32 icmp_in2out_slow_path (snat_main_t *sm,
key0.port = ((tcp_udp_header_t*)l4_header)->dst_port;
break;
default:
- b0->error = node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
+ return SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL;
}
}
+ *p_key0 = key0;
+ return -1; /* success */
+}
+
+/**
+ * Get address and port values to be used for packet SNAT translation
+ * and create session if needed
+ *
+ * @param[in,out] sm SNAT main
+ * @param[in,out] node SNAT node runtime
+ * @param[in] cpu_index CPU index
+ * @param[in,out] b0 buffer containing packet to be translated
+ * @param[out] p_key address and port before NAT translation
+ * @param[out] p_value address and port after NAT translation
+ * @param[out] p_dont_translate if packet should not be translated
+ * @param d optional parameter
+ */
+u32 icmp_match_in2out_slow(snat_main_t *sm, vlib_node_runtime_t *node,
+ u32 cpu_index, vlib_buffer_t *b0,
+ snat_session_key_t *p_key,
+ snat_session_key_t *p_value,
+ u8 *p_dont_translate, void *d)
+{
+ snat_runtime_t *rt;
+ ip4_header_t *ip0;
+ icmp46_header_t *icmp0;
+ u32 sw_if_index0;
+ u32 rx_fib_index0;
+ snat_session_key_t key0;
+ snat_session_t *s0 = 0;
+ u8 dont_translate = 0;
+ clib_bihash_kv_8_8_t kv0, value0;
+ u32 next0 = ~0;
+ int err;
+
+ rt = (snat_runtime_t *) node->runtime_data;
+ ip0 = vlib_buffer_get_current (b0);
+ icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
+ sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
+
+ err = icmp_get_key (icmp0, &key0);
+ if (err != -1)
+ {
+ b0->error = node->errors[err];
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
+ key0.addr = ip0->src_address;
+ key0.fib_index = rx_fib_index0;
kv0.key = key0.as_u64;
-
+
if (clib_bihash_search_8_8 (&sm->in2out, &kv0, &value0))
{
if (PREDICT_FALSE(snat_not_translate(sm, rt, sw_if_index0, ip0,
IP_PROTOCOL_ICMP, rx_fib_index0)))
- goto out;
+ {
+ dont_translate = 1;
+ goto out;
+ }
- if (is_error_message)
+ if (icmp_is_error_message (icmp0))
{
next0 = SNAT_IN2OUT_NEXT_DROP;
goto out;
@@ -512,7 +525,7 @@ static inline u32 icmp_in2out_slow_path (snat_main_t *sm,
next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
&s0, node, next0, cpu_index);
-
+
if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
goto out;
}
@@ -520,6 +533,121 @@ static inline u32 icmp_in2out_slow_path (snat_main_t *sm,
s0 = pool_elt_at_index (sm->per_thread_data[cpu_index].sessions,
value0.value);
+out:
+ *p_key = key0;
+ if (s0)
+ *p_value = s0->out2in;
+ *p_dont_translate = dont_translate;
+ if (d)
+ *(snat_session_t**)d = s0;
+ return next0;
+}
+
+/**
+ * Get address and port values to be used for packet SNAT translation
+ *
+ * @param[in] sm SNAT main
+ * @param[in,out] node SNAT node runtime
+ * @param[in] cpu_index CPU index
+ * @param[in,out] b0 buffer containing packet to be translated
+ * @param[out] p_key address and port before NAT translation
+ * @param[out] p_value address and port after NAT translation
+ * @param[out] p_dont_translate if packet should not be translated
+ * @param d optional parameter
+ */
+u32 icmp_match_in2out_fast(snat_main_t *sm, vlib_node_runtime_t *node,
+ u32 cpu_index, vlib_buffer_t *b0,
+ snat_session_key_t *p_key,
+ snat_session_key_t *p_value,
+ u8 *p_dont_translate, void *d)
+{
+ snat_runtime_t *rt;
+ ip4_header_t *ip0;
+ icmp46_header_t *icmp0;
+ u32 sw_if_index0;
+ u32 rx_fib_index0;
+ snat_session_key_t key0;
+ snat_session_key_t sm0;
+ u8 dont_translate = 0;
+ u32 next0 = ~0;
+ int err;
+
+ rt = (snat_runtime_t *) node->runtime_data;
+ ip0 = vlib_buffer_get_current (b0);
+ icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
+ sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
+
+ err = icmp_get_key (icmp0, &key0);
+ if (err != -1)
+ {
+ b0->error = node->errors[err];
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out2;
+ }
+ key0.addr = ip0->src_address;
+ key0.fib_index = rx_fib_index0;
+
+ if (snat_static_mapping_match(sm, key0, &sm0, 0))
+ {
+ if (PREDICT_FALSE(snat_not_translate(sm, rt, sw_if_index0, ip0,
+ IP_PROTOCOL_ICMP, rx_fib_index0)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
+
+ if (icmp_is_error_message (icmp0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
+
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
+
+out:
+ *p_value = sm0;
+out2:
+ *p_key = key0;
+ *p_dont_translate = dont_translate;
+ return next0;
+}
+
+static inline u32 icmp_in2out (snat_main_t *sm,
+ vlib_buffer_t * b0,
+ ip4_header_t * ip0,
+ icmp46_header_t * icmp0,
+ u32 sw_if_index0,
+ u32 rx_fib_index0,
+ vlib_node_runtime_t * node,
+ u32 next0,
+ u32 cpu_index,
+ void *d)
+{
+ snat_session_key_t key0, sm0;
+ icmp_echo_header_t *echo0, *inner_echo0 = 0;
+ ip4_header_t *inner_ip0;
+ void *l4_header = 0;
+ icmp46_header_t *inner_icmp0;
+ u8 dont_translate;
+ u32 new_addr0, old_addr0;
+ u16 old_id0, new_id0;
+ ip_csum_t sum0;
+ u16 checksum0;
+ u32 next0_tmp;
+
+ echo0 = (icmp_echo_header_t *)(icmp0+1);
+
+ next0_tmp = sm->icmp_match_in2out_cb(sm, node, cpu_index, b0,
+ &key0, &sm0, &dont_translate, d);
+ if (next0_tmp != ~0)
+ next0 = 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);
@@ -530,28 +658,34 @@ static inline u32 icmp_in2out_slow_path (snat_main_t *sm,
}
old_addr0 = ip0->src_address.as_u32;
- ip0->src_address = s0->out2in.addr;
- new_addr0 = ip0->src_address.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
+ new_addr0 = ip0->src_address.as_u32 = sm0.addr.as_u32;
+ 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,
src_address /* changed member */);
ip0->checksum = ip_csum_fold (sum0);
- if (!is_error_message)
+ if (!icmp_is_error_message (icmp0))
{
- old_id0 = echo0->identifier;
- new_id0 = s0->out2in.port;
- echo0->identifier = new_id0;
-
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
- identifier);
- icmp0->checksum = ip_csum_fold (sum0);
+ new_id0 = sm0.port;
+ if (PREDICT_FALSE(new_id0 != echo0->identifier))
+ {
+ old_id0 = echo0->identifier;
+ new_id0 = sm0.port;
+ echo0->identifier = new_id0;
+
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
+ identifier);
+ icmp0->checksum = ip_csum_fold (sum0);
+ }
}
else
{
+ inner_ip0 = (ip4_header_t *)(echo0+1);
+ l4_header = ip4_next_header (inner_ip0);
+
if (!ip4_header_checksum_is_valid (inner_ip0))
{
next0 = SNAT_IN2OUT_NEXT_DROP;
@@ -559,7 +693,7 @@ static inline u32 icmp_in2out_slow_path (snat_main_t *sm,
}
old_addr0 = inner_ip0->dst_address.as_u32;
- inner_ip0->dst_address = s0->out2in.addr;
+ inner_ip0->dst_address = sm0.addr;
new_addr0 = inner_ip0->src_address.as_u32;
sum0 = icmp0->checksum;
@@ -570,8 +704,11 @@ static inline u32 icmp_in2out_slow_path (snat_main_t *sm,
switch (key0.protocol)
{
case SNAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t*)l4_header;
+ inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1);
+
old_id0 = inner_echo0->identifier;
- new_id0 = s0->out2in.port;
+ new_id0 = sm0.port;
inner_echo0->identifier = new_id0;
sum0 = icmp0->checksum;
@@ -582,7 +719,7 @@ static inline u32 icmp_in2out_slow_path (snat_main_t *sm,
case SNAT_PROTOCOL_UDP:
case SNAT_PROTOCOL_TCP:
old_id0 = ((tcp_udp_header_t*)l4_header)->dst_port;
- new_id0 = s0->out2in.port;
+ new_id0 = sm0.port;
((tcp_udp_header_t*)l4_header)->dst_port = new_id0;
sum0 = icmp0->checksum;
@@ -595,22 +732,7 @@ static inline u32 icmp_in2out_slow_path (snat_main_t *sm,
}
}
- /* Accounting */
- s0->last_heard = now;
- s0->total_pkts++;
- s0->total_bytes += vlib_buffer_length_in_chain (sm->vlib_main, b0);
- /* Per-user LRU list maintenance for dynamic translations */
- if (!snat_is_session_static (s0))
- {
- clib_dlist_remove (sm->per_thread_data[cpu_index].list_pool,
- s0->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[cpu_index].list_pool,
- s0->per_user_list_head_index,
- s0->per_user_index);
- }
-
out:
- *p_s0 = s0;
return next0;
}
@@ -716,6 +838,40 @@ snat_hairpinning (snat_main_t *sm,
}
}
+static inline u32 icmp_in2out_slow_path (snat_main_t *sm,
+ vlib_buffer_t * b0,
+ ip4_header_t * ip0,
+ icmp46_header_t * icmp0,
+ u32 sw_if_index0,
+ u32 rx_fib_index0,
+ vlib_node_runtime_t * node,
+ u32 next0,
+ f64 now,
+ u32 cpu_index,
+ snat_session_t ** p_s0)
+{
+ next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, cpu_index, p_s0);
+ snat_session_t * s0 = *p_s0;
+ if (PREDICT_TRUE(next0 != SNAT_IN2OUT_NEXT_DROP && s0))
+ {
+ /* Accounting */
+ s0->last_heard = now;
+ s0->total_pkts++;
+ s0->total_bytes += vlib_buffer_length_in_chain (sm->vlib_main, b0);
+ /* Per-user LRU list maintenance for dynamic translations */
+ if (!snat_is_session_static (s0))
+ {
+ clib_dlist_remove (sm->per_thread_data[cpu_index].list_pool,
+ s0->per_user_index);
+ clib_dlist_addtail (sm->per_thread_data[cpu_index].list_pool,
+ s0->per_user_list_head_index,
+ s0->per_user_index);
+ }
+ }
+ return next0;
+}
+
static inline uword
snat_in2out_node_fn_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
@@ -1997,67 +2153,6 @@ VLIB_REGISTER_NODE (snat_in2out_worker_handoff_node) = {
VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_worker_handoff_node, snat_in2out_worker_handoff_fn);
-/********************************/
-/*** static mapping only mode ***/
-/********************************/
-static inline u32 icmp_in2out_static_map (snat_main_t *sm,
- vlib_buffer_t * b0,
- ip4_header_t * ip0,
- icmp46_header_t * icmp0,
- u32 sw_if_index0,
- vlib_node_runtime_t * node,
- u32 next0,
- u32 rx_fib_index0)
-{
- snat_session_key_t key0, sm0;
- icmp_echo_header_t *echo0;
- u32 new_addr0, old_addr0;
- u16 old_id0, new_id0;
- ip_csum_t sum0;
- snat_runtime_t * rt = (snat_runtime_t *)node->runtime_data;
-
- echo0 = (icmp_echo_header_t *)(icmp0+1);
-
- key0.addr = ip0->src_address;
- key0.port = echo0->identifier;
- key0.fib_index = rx_fib_index0;
-
- if (snat_static_mapping_match(sm, key0, &sm0, 0))
- {
- if (PREDICT_FALSE(snat_not_translate(sm, rt, sw_if_index0, ip0,
- IP_PROTOCOL_ICMP, rx_fib_index0)))
- return next0;
-
- b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
- return SNAT_IN2OUT_NEXT_DROP;
- }
-
- new_addr0 = sm0.addr.as_u32;
- new_id0 = sm0.port;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
- old_addr0 = ip0->src_address.as_u32;
- ip0->src_address.as_u32 = new_addr0;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- src_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_FALSE(new_id0 != echo0->identifier))
- {
- old_id0 = echo0->identifier;
- echo0->identifier = new_id0;
-
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
- identifier);
- icmp0->checksum = ip_csum_fold (sum0);
- }
-
- return next0;
-}
-
static uword
snat_in2out_fast_static_map_fn (vlib_main_t * vm,
vlib_node_runtime_t * node,
@@ -2130,8 +2225,8 @@ snat_in2out_fast_static_map_fn (vlib_main_t * vm,
proto0, rx_fib_index0)))
goto trace0;
- next0 = icmp_in2out_static_map
- (sm, b0, ip0, icmp0, sw_if_index0, node, next0, rx_fib_index0);
+ next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0,
+ rx_fib_index0, node, next0, ~0, 0);
goto trace0;
}
diff --git a/src/plugins/snat/out2in.c b/src/plugins/snat/out2in.c
index 178aa560940..656e42dbd81 100644
--- a/src/plugins/snat/out2in.c
+++ b/src/plugins/snat/out2in.c
@@ -226,52 +226,19 @@ create_session_for_static_mapping (snat_main_t *sm,
return s;
}
-typedef struct {
- u16 src_port, dst_port;
-} tcp_udp_header_t;
-
-static inline u32 icmp_out2in_slow_path (snat_main_t *sm,
- vlib_buffer_t * b0,
- ip4_header_t * ip0,
- icmp46_header_t * icmp0,
- u32 sw_if_index0,
- u32 rx_fib_index0,
- vlib_node_runtime_t * node,
- u32 next0, f64 now,
- u32 cpu_index,
- snat_session_t ** p_s0)
+static_always_inline
+snat_out2in_error_t icmp_get_key(icmp46_header_t *icmp0,
+ snat_session_key_t *p_key0)
{
- snat_session_key_t key0, sm0;
+ snat_session_key_t key0;
icmp_echo_header_t *echo0, *inner_echo0 = 0;
- ip4_header_t *inner_ip0 = 0;
+ ip4_header_t *inner_ip0;
void *l4_header = 0;
icmp46_header_t *inner_icmp0;
- clib_bihash_kv_8_8_t kv0, value0;
- snat_session_t * s0 = 0;
- u32 new_addr0, old_addr0;
- u16 old_id0, new_id0;
- ip_csum_t sum0;
- u16 checksum0;
- snat_runtime_t * rt = (snat_runtime_t *)node->runtime_data;
- u8 is_error_message = 0;
echo0 = (icmp_echo_header_t *)(icmp0+1);
- key0.addr = ip0->dst_address;
- key0.fib_index = rx_fib_index0;
-
- switch(icmp0->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:
- is_error_message = 1;
- }
-
- if (!is_error_message)
+ if (!icmp_is_error_message (icmp0))
{
key0.protocol = SNAT_PROTOCOL_ICMP;
key0.port = echo0->identifier;
@@ -293,44 +260,105 @@ static inline u32 icmp_out2in_slow_path (snat_main_t *sm,
key0.port = ((tcp_udp_header_t*)l4_header)->src_port;
break;
default:
- b0->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto out;
+ return SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL;
}
}
+ *p_key0 = key0;
+ return -1; /* success */
+}
+
+static_always_inline u8
+is_interface_addr(snat_main_t *sm, vlib_node_runtime_t *node, u32 sw_if_index0,
+ u32 ip4_addr)
+{
+ snat_runtime_t *rt = (snat_runtime_t *) node->runtime_data;
+ ip4_address_t * first_int_addr;
+
+ if (PREDICT_FALSE(rt->cached_sw_if_index != sw_if_index0))
+ {
+ first_int_addr =
+ ip4_interface_first_address (sm->ip4_main, sw_if_index0,
+ 0 /* just want the address */);
+ rt->cached_sw_if_index = sw_if_index0;
+ if (first_int_addr)
+ rt->cached_ip4_address = first_int_addr->as_u32;
+ else
+ rt->cached_ip4_address = 0;
+ }
+
+ if (PREDICT_FALSE(ip4_addr == rt->cached_ip4_address))
+ return 1;
+ else
+ return 0;
+}
+
+/**
+ * Get address and port values to be used for packet SNAT translation
+ * and create session if needed
+ *
+ * @param[in,out] sm SNAT main
+ * @param[in,out] node SNAT node runtime
+ * @param[in] cpu_index CPU index
+ * @param[in,out] b0 buffer containing packet to be translated
+ * @param[out] p_key address and port before NAT translation
+ * @param[out] p_value address and port after NAT translation
+ * @param[out] p_dont_translate if packet should not be translated
+ * @param d optional parameter
+ */
+u32 icmp_match_out2in_slow(snat_main_t *sm, vlib_node_runtime_t *node,
+ u32 cpu_index, vlib_buffer_t *b0,
+ snat_session_key_t *p_key,
+ snat_session_key_t *p_value,
+ u8 *p_dont_translate, void *d)
+{
+ ip4_header_t *ip0;
+ icmp46_header_t *icmp0;
+ u32 sw_if_index0;
+ u32 rx_fib_index0;
+ snat_session_key_t key0;
+ snat_session_key_t sm0;
+ snat_session_t *s0 = 0;
+ u8 dont_translate = 0;
+ clib_bihash_kv_8_8_t kv0, value0;
+ u32 next0 = ~0;
+ int err;
+
+ ip0 = vlib_buffer_get_current (b0);
+ icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
+ sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
+
+ err = icmp_get_key (icmp0, &key0);
+ if (err != -1)
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+ key0.addr = ip0->dst_address;
+ key0.fib_index = rx_fib_index0;
kv0.key = key0.as_u64;
-
+
if (clib_bihash_search_8_8 (&sm->out2in, &kv0, &value0))
{
/* Try to match static mapping by external address and port,
destination address and port in packet */
if (snat_static_mapping_match(sm, key0, &sm0, 1))
{
- ip4_address_t * first_int_addr;
-
- if (PREDICT_FALSE(rt->cached_sw_if_index != sw_if_index0))
+ /* Don't NAT packet aimed at the intfc address */
+ if (is_interface_addr(sm, node, sw_if_index0,
+ ip0->dst_address.as_u32))
{
- first_int_addr =
- ip4_interface_first_address (sm->ip4_main, sw_if_index0,
- 0 /* just want the address */);
- rt->cached_sw_if_index = sw_if_index0;
- if (first_int_addr)
- rt->cached_ip4_address = first_int_addr->as_u32;
- else
- rt->cached_ip4_address = 0;
+ dont_translate = 1;
+ goto out;
}
-
- /* Don't NAT packet aimed at the intfc address */
- if (PREDICT_FALSE(ip0->dst_address.as_u32 == rt->cached_ip4_address))
- goto out;
-
b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
next0 = SNAT_OUT2IN_NEXT_DROP;
goto out;
}
- if (is_error_message)
+ if (icmp_is_error_message (icmp0))
{
next0 = SNAT_OUT2IN_NEXT_DROP;
goto out;
@@ -350,7 +378,114 @@ static inline u32 icmp_out2in_slow_path (snat_main_t *sm,
s0 = pool_elt_at_index (sm->per_thread_data[cpu_index].sessions,
value0.value);
- if (PREDICT_FALSE(icmp0->type != ICMP4_echo_reply && !is_error_message))
+out:
+ *p_key = key0;
+ if (s0)
+ *p_value = s0->in2out;
+ *p_dont_translate = dont_translate;
+ if (d)
+ *(snat_session_t**)d = s0;
+ return next0;
+}
+
+/**
+ * Get address and port values to be used for packet SNAT translation
+ *
+ * @param[in] sm SNAT main
+ * @param[in,out] node SNAT node runtime
+ * @param[in] cpu_index CPU index
+ * @param[in,out] b0 buffer containing packet to be translated
+ * @param[out] p_key address and port before NAT translation
+ * @param[out] p_value address and port after NAT translation
+ * @param[out] p_dont_translate if packet should not be translated
+ * @param d optional parameter
+ */
+u32 icmp_match_out2in_fast(snat_main_t *sm, vlib_node_runtime_t *node,
+ u32 cpu_index, vlib_buffer_t *b0,
+ snat_session_key_t *p_key,
+ snat_session_key_t *p_value,
+ u8 *p_dont_translate, void *d)
+{
+ ip4_header_t *ip0;
+ icmp46_header_t *icmp0;
+ u32 sw_if_index0;
+ u32 rx_fib_index0;
+ snat_session_key_t key0;
+ snat_session_key_t sm0;
+ u8 dont_translate = 0;
+ u32 next0 = ~0;
+ int err;
+
+ ip0 = vlib_buffer_get_current (b0);
+ icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
+ sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
+
+ err = icmp_get_key (icmp0, &key0);
+ if (err != -1)
+ {
+ b0->error = node->errors[err];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto out2;
+ }
+ key0.addr = ip0->dst_address;
+ key0.fib_index = rx_fib_index0;
+
+ if (snat_static_mapping_match(sm, key0, &sm0, 1))
+ {
+ /* Don't NAT packet aimed at the intfc address */
+ if (is_interface_addr(sm, node, sw_if_index0, ip0->dst_address.as_u32))
+ {
+ dont_translate = 1;
+ goto out;
+ }
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+
+out:
+ *p_value = sm0;
+out2:
+ *p_key = key0;
+ *p_dont_translate = dont_translate;
+ return next0;
+}
+
+static inline u32 icmp_out2in (snat_main_t *sm,
+ vlib_buffer_t * b0,
+ ip4_header_t * ip0,
+ icmp46_header_t * icmp0,
+ u32 sw_if_index0,
+ u32 rx_fib_index0,
+ vlib_node_runtime_t * node,
+ u32 next0,
+ u32 cpu_index,
+ void *d)
+{
+ snat_session_key_t key0, sm0;
+ icmp_echo_header_t *echo0, *inner_echo0 = 0;
+ ip4_header_t *inner_ip0 = 0;
+ void *l4_header = 0;
+ icmp46_header_t *inner_icmp0;
+ u8 dont_translate;
+ u32 new_addr0, old_addr0;
+ u16 old_id0, new_id0;
+ ip_csum_t sum0;
+ u16 checksum0;
+ u32 next0_tmp;
+
+ echo0 = (icmp_echo_header_t *)(icmp0+1);
+
+ next0_tmp = sm->icmp_match_out2in_cb(sm, node, cpu_index, b0,
+ &key0, &sm0, &dont_translate, d);
+ if (next0_tmp != ~0)
+ next0 = next0_tmp;
+ if (next0 == SNAT_OUT2IN_NEXT_DROP || dont_translate)
+ goto out;
+
+ if (PREDICT_FALSE(icmp0->type != ICMP4_echo_reply &&
+ !icmp_is_error_message (icmp0)))
{
b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
next0 = SNAT_OUT2IN_NEXT_DROP;
@@ -367,28 +502,34 @@ static inline u32 icmp_out2in_slow_path (snat_main_t *sm,
}
old_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address = s0->in2out.addr;
- new_addr0 = ip0->dst_address.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
-
+ new_addr0 = ip0->dst_address.as_u32 = sm0.addr.as_u32;
+ 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,
dst_address /* changed member */);
ip0->checksum = ip_csum_fold (sum0);
-
- if (!is_error_message)
+
+ if (!icmp_is_error_message (icmp0))
{
- old_id0 = echo0->identifier;
- new_id0 = s0->in2out.port;
- echo0->identifier = new_id0;
+ new_id0 = sm0.port;
+ if (PREDICT_FALSE(new_id0 != echo0->identifier))
+ {
+ old_id0 = echo0->identifier;
+ new_id0 = sm0.port;
+ echo0->identifier = new_id0;
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
- identifier /* changed member */);
- icmp0->checksum = ip_csum_fold (sum0);
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
+ identifier /* changed member */);
+ icmp0->checksum = ip_csum_fold (sum0);
+ }
}
else
{
+ inner_ip0 = (ip4_header_t *)(echo0+1);
+ l4_header = ip4_next_header (inner_ip0);
+
if (!ip4_header_checksum_is_valid (inner_ip0))
{
next0 = SNAT_OUT2IN_NEXT_DROP;
@@ -396,7 +537,7 @@ static inline u32 icmp_out2in_slow_path (snat_main_t *sm,
}
old_addr0 = inner_ip0->src_address.as_u32;
- inner_ip0->src_address = s0->in2out.addr;
+ inner_ip0->src_address = sm0.addr;
new_addr0 = inner_ip0->src_address.as_u32;
sum0 = icmp0->checksum;
@@ -407,8 +548,11 @@ static inline u32 icmp_out2in_slow_path (snat_main_t *sm,
switch (key0.protocol)
{
case SNAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t*)l4_header;
+ inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1);
+
old_id0 = inner_echo0->identifier;
- new_id0 = s0->in2out.port;
+ new_id0 = sm0.port;
inner_echo0->identifier = new_id0;
sum0 = icmp0->checksum;
@@ -419,7 +563,7 @@ static inline u32 icmp_out2in_slow_path (snat_main_t *sm,
case SNAT_PROTOCOL_UDP:
case SNAT_PROTOCOL_TCP:
old_id0 = ((tcp_udp_header_t*)l4_header)->src_port;
- new_id0 = s0->in2out.port;
+ new_id0 = sm0.port;
((tcp_udp_header_t*)l4_header)->src_port = new_id0;
sum0 = icmp0->checksum;
@@ -432,22 +576,41 @@ static inline u32 icmp_out2in_slow_path (snat_main_t *sm,
}
}
- /* Accounting */
- s0->last_heard = now;
- s0->total_pkts++;
- s0->total_bytes += vlib_buffer_length_in_chain (sm->vlib_main, b0);
- /* Per-user LRU list maintenance for dynamic translation */
- if (!snat_is_session_static (s0))
+out:
+ return next0;
+}
+
+
+static inline u32 icmp_out2in_slow_path (snat_main_t *sm,
+ vlib_buffer_t * b0,
+ ip4_header_t * ip0,
+ icmp46_header_t * icmp0,
+ u32 sw_if_index0,
+ u32 rx_fib_index0,
+ vlib_node_runtime_t * node,
+ u32 next0, f64 now,
+ u32 cpu_index,
+ snat_session_t ** p_s0)
+{
+ next0 = icmp_out2in(sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, cpu_index, p_s0);
+ snat_session_t * s0 = *p_s0;
+ if (PREDICT_TRUE(next0 != SNAT_OUT2IN_NEXT_DROP && s0))
{
- clib_dlist_remove (sm->per_thread_data[cpu_index].list_pool,
- s0->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[cpu_index].list_pool,
- s0->per_user_list_head_index,
- s0->per_user_index);
+ /* Accounting */
+ s0->last_heard = now;
+ s0->total_pkts++;
+ s0->total_bytes += vlib_buffer_length_in_chain (sm->vlib_main, b0);
+ /* Per-user LRU list maintenance for dynamic translation */
+ if (!snat_is_session_static (s0))
+ {
+ clib_dlist_remove (sm->per_thread_data[cpu_index].list_pool,
+ s0->per_user_index);
+ clib_dlist_addtail (sm->per_thread_data[cpu_index].list_pool,
+ s0->per_user_list_head_index,
+ s0->per_user_index);
+ }
}
-
-out:
- *p_s0 = s0;
return next0;
}
@@ -1579,83 +1742,6 @@ VLIB_REGISTER_NODE (snat_out2in_worker_handoff_node) = {
VLIB_NODE_FUNCTION_MULTIARCH (snat_out2in_worker_handoff_node, snat_out2in_worker_handoff_fn);
-/********************************/
-/*** static mapping only mode ***/
-/********************************/
-static inline u32 icmp_out2in_fast (snat_main_t *sm,
- vlib_buffer_t * b0,
- ip4_header_t * ip0,
- icmp46_header_t * icmp0,
- u32 sw_if_index0,
- vlib_node_runtime_t * node,
- u32 next0,
- u32 rx_fib_index0)
-{
- snat_session_key_t key0, sm0;
- icmp_echo_header_t *echo0;
- u32 new_addr0, old_addr0;
- u16 old_id0, new_id0;
- ip_csum_t sum0;
- snat_runtime_t * rt = (snat_runtime_t *)node->runtime_data;
-
- echo0 = (icmp_echo_header_t *)(icmp0+1);
-
- key0.addr = ip0->dst_address;
- key0.port = echo0->identifier;
- key0.fib_index = rx_fib_index0;
-
- if (snat_static_mapping_match(sm, key0, &sm0, 1))
- {
- ip4_address_t * first_int_addr;
-
- if (PREDICT_FALSE(rt->cached_sw_if_index != sw_if_index0))
- {
- first_int_addr =
- ip4_interface_first_address (sm->ip4_main, sw_if_index0,
- 0 /* just want the address */);
- rt->cached_sw_if_index = sw_if_index0;
- if (first_int_addr)
- rt->cached_ip4_address = first_int_addr->as_u32;
- else
- rt->cached_ip4_address = 0;
- }
-
- /* Don't NAT packet aimed at the intfc address */
- if (PREDICT_FALSE(ip0->dst_address.as_u32 ==
- rt->cached_ip4_address))
- return next0;
-
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- return SNAT_OUT2IN_NEXT_DROP;
- }
-
- new_addr0 = sm0.addr.as_u32;
- new_id0 = sm0.port;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
-
- old_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address.as_u32 = new_addr0;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_FALSE(new_id0 != echo0->identifier))
- {
- old_id0 = echo0->identifier;
- echo0->identifier = new_id0;
-
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
- identifier);
- icmp0->checksum = ip_csum_fold (sum0);
- }
-
- return next0;
-}
-
static uword
snat_out2in_fast_node_fn (vlib_main_t * vm,
vlib_node_runtime_t * node,
@@ -1721,8 +1807,8 @@ snat_out2in_fast_node_fn (vlib_main_t * vm,
if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
{
- next0 = icmp_out2in_fast
- (sm, b0, ip0, icmp0, sw_if_index0, node, next0, rx_fib_index0);
+ next0 = icmp_out2in(sm, b0, ip0, icmp0, sw_if_index0,
+ rx_fib_index0, node, next0, ~0, 0);
goto trace00;
}
diff --git a/src/plugins/snat/snat.c b/src/plugins/snat/snat.c
index a735eb8adc6..b9da67f51ca 100644
--- a/src/plugins/snat/snat.c
+++ b/src/plugins/snat/snat.c
@@ -2657,6 +2657,9 @@ snat_config (vlib_main_t * vm, unformat_input_t * input)
if (!static_mapping_only ||
(static_mapping_only && static_mapping_connection_tracking))
{
+ sm->icmp_match_in2out_cb = icmp_match_in2out_slow;
+ sm->icmp_match_out2in_cb = icmp_match_out2in_slow;
+
clib_bihash_init_8_8 (&sm->worker_by_in, "worker-by-in", user_buckets,
user_memory_size);
@@ -2674,6 +2677,11 @@ snat_config (vlib_main_t * vm, unformat_input_t * input)
clib_bihash_init_8_8 (&sm->user_hash, "users", user_buckets,
user_memory_size);
}
+ else
+ {
+ sm->icmp_match_in2out_cb = icmp_match_in2out_fast;
+ sm->icmp_match_out2in_cb = icmp_match_out2in_fast;
+ }
clib_bihash_init_8_8 (&sm->static_mapping_by_local,
"static_mapping_by_local", static_mapping_buckets,
static_mapping_memory_size);
diff --git a/src/plugins/snat/snat.h b/src/plugins/snat/snat.h
index 9cfd6be222e..017825c0904 100644
--- a/src/plugins/snat/snat.h
+++ b/src/plugins/snat/snat.h
@@ -217,9 +217,20 @@ typedef struct {
dlist_elt_t * list_pool;
} snat_main_per_thread_data_t;
+struct snat_main_s;
+
+typedef u32 snat_icmp_match_function_t (struct snat_main_s *sm,
+ vlib_node_runtime_t *node,
+ u32 cpu_index,
+ vlib_buffer_t *b0,
+ snat_session_key_t *p_key,
+ snat_session_key_t *p_value,
+ u8 *p_dont_translate,
+ void *d);
+
typedef u32 (snat_get_worker_function_t) (ip4_header_t * ip, u32 rx_fib_index);
-typedef struct {
+typedef struct snat_main_s {
/* Main lookup tables */
clib_bihash_8_8_t out2in;
clib_bihash_8_8_t in2out;
@@ -233,6 +244,9 @@ typedef struct {
/* Translated packets worker lookup => IP address + port number */
clib_bihash_8_8_t worker_by_out;
+ snat_icmp_match_function_t * icmp_match_in2out_cb;
+ snat_icmp_match_function_t * icmp_match_out2in_cb;
+
u32 num_workers;
u32 first_worker_index;
u32 next_worker;
@@ -383,4 +397,45 @@ snat_proto_to_ip_proto (snat_protocol_t snat_proto)
return ip_proto;
}
+typedef struct {
+ u16 src_port, dst_port;
+} tcp_udp_header_t;
+
+u32 icmp_match_in2out_fast(snat_main_t *sm, vlib_node_runtime_t *node,
+ u32 cpu_index, vlib_buffer_t *b0,
+ snat_session_key_t *p_key,
+ snat_session_key_t *p_value,
+ u8 *p_dont_translate, void *d);
+u32 icmp_match_in2out_slow(snat_main_t *sm, vlib_node_runtime_t *node,
+ u32 cpu_index, vlib_buffer_t *b0,
+ snat_session_key_t *p_key,
+ snat_session_key_t *p_value,
+ u8 *p_dont_translate, void *d);
+u32 icmp_match_out2in_fast(snat_main_t *sm, vlib_node_runtime_t *node,
+ u32 cpu_index, vlib_buffer_t *b0,
+ snat_session_key_t *p_key,
+ snat_session_key_t *p_value,
+ u8 *p_dont_translate, void *d);
+u32 icmp_match_out2in_slow(snat_main_t *sm, vlib_node_runtime_t *node,
+ u32 cpu_index, vlib_buffer_t *b0,
+ snat_session_key_t *p_key,
+ snat_session_key_t *p_value,
+ u8 *p_dont_translate, void *d);
+
+static_always_inline u8
+icmp_is_error_message (icmp46_header_t * icmp)
+{
+ 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;
+}
+
#endif /* __included_snat_h__ */