_(IN2OUT_PACKETS, "Good in2out packets processed") \
_(OUT_OF_PORTS, "Out of ports") \
_(BAD_OUTSIDE_FIB, "Outside VRF ID not found") \
-_(BAD_ICMP_TYPE, "icmp type not echo-request") \
+_(BAD_ICMP_TYPE, "unsupported ICMP type") \
_(NO_TRANSLATION, "No translation")
typedef enum {
typedef enum {
SNAT_IN2OUT_NEXT_LOOKUP,
SNAT_IN2OUT_NEXT_DROP,
- SNAT_IN2OUT_NEXT_SLOW_PATH,
SNAT_IN2OUT_NEXT_ICMP_ERROR,
+ SNAT_IN2OUT_NEXT_SLOW_PATH,
SNAT_IN2OUT_N_NEXT,
} snat_in2out_next_t;
* @returns 0 if packet should be translated otherwise 1
*/
static inline int
-snat_not_translate (snat_main_t * sm, snat_runtime_t * rt, u32 sw_if_index0,
- ip4_header_t * ip0, u32 proto0, u32 rx_fib_index0)
+snat_not_translate_fast (snat_main_t * sm, vlib_node_runtime_t *node,
+ u32 sw_if_index0, ip4_header_t * ip0, u32 proto0,
+ u32 rx_fib_index0)
{
- ip4_address_t * first_int_addr;
- udp_header_t * udp0 = ip4_next_header (ip0);
- snat_session_key_t key0, sm0;
- clib_bihash_kv_8_8_t kv0, value0;
fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
fib_prefix_t pfx = {
.fp_proto = FIB_PROTOCOL_IP4,
},
};
- 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))
+ if (PREDICT_FALSE(is_interface_addr(sm, node, sw_if_index0,
+ ip0->dst_address.as_u32)))
return 1;
- key0.addr = ip0->dst_address;
- key0.port = udp0->dst_port;
- key0.protocol = proto0;
- key0.fib_index = sm->outside_fib_index;
- kv0.key = key0.as_u64;
-
- /* NAT packet aimed at external address if */
- /* has active sessions */
- if (clib_bihash_search_8_8 (&sm->out2in, &kv0, &value0))
- {
- /* or is static mappings */
- if (!snat_static_mapping_match(sm, key0, &sm0, 1))
- return 0;
- }
- else
- return 0;
-
fei = fib_table_lookup (rx_fib_index0, &pfx);
if (FIB_NODE_INDEX_INVALID != fei)
{
return 1;
}
+static inline int
+snat_not_translate (snat_main_t * sm, vlib_node_runtime_t *node,
+ u32 sw_if_index0, ip4_header_t * ip0, u32 proto0,
+ u32 rx_fib_index0)
+{
+ udp_header_t * udp0 = ip4_next_header (ip0);
+ snat_session_key_t key0, sm0;
+ clib_bihash_kv_8_8_t kv0, value0;
+
+ key0.addr = ip0->dst_address;
+ key0.port = udp0->dst_port;
+ key0.protocol = proto0;
+ key0.fib_index = sm->outside_fib_index;
+ kv0.key = key0.as_u64;
+
+ /* NAT packet aimed at external address if */
+ /* has active sessions */
+ if (clib_bihash_search_8_8 (&sm->out2in, &kv0, &value0))
+ {
+ /* or is static mappings */
+ if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0))
+ return 0;
+ }
+ else
+ return 0;
+
+ return snat_not_translate_fast(sm, node, sw_if_index0, ip0, proto0,
+ rx_fib_index0);
+}
+
static u32 slow_path (snat_main_t *sm, vlib_buffer_t *b0,
ip4_header_t * ip0,
u32 rx_fib_index0,
u8 static_mapping = 1;
/* First try to match static mapping by local address and port */
- if (snat_static_mapping_match (sm, *key0, &key1, 0))
+ if (snat_static_mapping_match (sm, *key0, &key1, 0, 0))
{
static_mapping = 0;
/* Try to create dynamic translation */
if (!icmp_is_error_message (icmp0))
{
- if (PREDICT_FALSE(icmp0->type != ICMP4_echo_request))
- return SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE;
key0.protocol = SNAT_PROTOCOL_ICMP;
key0.addr = ip0->src_address;
key0.port = echo0->identifier;
* @param[in,out] node SNAT node runtime
* @param[in] thread_index thread index
* @param[in,out] b0 buffer containing packet to be translated
- * @param[out] p_key address and port before NAT translation
+ * @param[out] p_proto protocol used for matching
* @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
+ * @param e optional parameter
*/
u32 icmp_match_in2out_slow(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0,
- snat_session_key_t *p_key,
+ u32 thread_index, vlib_buffer_t *b0, u8 *p_proto,
snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d)
+ u8 *p_dont_translate, void *d, void *e)
{
- snat_runtime_t *rt;
ip4_header_t *ip0;
icmp46_header_t *icmp0;
u32 sw_if_index0;
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];
if (clib_bihash_search_8_8 (&sm->in2out, &kv0, &value0))
{
- if (PREDICT_FALSE(snat_not_translate(sm, rt, sw_if_index0, ip0,
+ if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0, ip0,
IP_PROTOCOL_ICMP, rx_fib_index0)))
{
dont_translate = 1;
goto out;
}
- 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;
}
goto out;
}
else
- s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value0.value);
+ {
+ if (PREDICT_FALSE(icmp0->type != ICMP4_echo_request &&
+ icmp0->type != ICMP4_echo_reply &&
+ !icmp_is_error_message (icmp0)))
+ {
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
+
+ s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ value0.value);
+ }
out:
- *p_key = key0;
+ *p_proto = key0.protocol;
if (s0)
*p_value = s0->out2in;
*p_dont_translate = dont_translate;
* @param[in,out] node SNAT node runtime
* @param[in] thread_index thread index
* @param[in,out] b0 buffer containing packet to be translated
- * @param[out] p_key address and port before NAT translation
+ * @param[out] p_proto protocol used for matching
* @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
+ * @param e optional parameter
*/
u32 icmp_match_in2out_fast(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0,
- snat_session_key_t *p_key,
+ u32 thread_index, vlib_buffer_t *b0, u8 *p_proto,
snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d)
+ u8 *p_dont_translate, void *d, void *e)
{
- snat_runtime_t *rt;
ip4_header_t *ip0;
icmp46_header_t *icmp0;
u32 sw_if_index0;
snat_session_key_t key0;
snat_session_key_t sm0;
u8 dont_translate = 0;
+ u8 is_addr_only;
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];
}
key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, key0, &sm0, 0))
+ if (snat_static_mapping_match(sm, key0, &sm0, 0, &is_addr_only))
{
- if (PREDICT_FALSE(snat_not_translate(sm, rt, sw_if_index0, ip0,
+ if (PREDICT_FALSE(snat_not_translate_fast(sm, node, sw_if_index0, ip0,
IP_PROTOCOL_ICMP, rx_fib_index0)))
{
dont_translate = 1;
goto out;
}
+ if (PREDICT_FALSE(icmp0->type != ICMP4_echo_request &&
+ (icmp0->type != ICMP4_echo_reply || !is_addr_only) &&
+ !icmp_is_error_message (icmp0)))
+ {
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
+
out:
*p_value = sm0;
out2:
- *p_key = key0;
+ *p_proto = key0.protocol;
*p_dont_translate = dont_translate;
return next0;
}
vlib_node_runtime_t * node,
u32 next0,
u32 thread_index,
- void *d)
+ void *d,
+ void *e)
{
- snat_session_key_t key0, sm0;
+ snat_session_key_t sm0;
+ u8 protocol;
icmp_echo_header_t *echo0, *inner_echo0 = 0;
ip4_header_t *inner_ip0;
void *l4_header = 0;
echo0 = (icmp_echo_header_t *)(icmp0+1);
next0_tmp = sm->icmp_match_in2out_cb(sm, node, thread_index, b0,
- &key0, &sm0, &dont_translate, d);
+ &protocol, &sm0, &dont_translate, d, e);
if (next0_tmp != ~0)
next0 = next0_tmp;
if (next0 == SNAT_IN2OUT_NEXT_DROP || dont_translate)
dst_address /* changed member */);
icmp0->checksum = ip_csum_fold (sum0);
- switch (key0.protocol)
+ switch (protocol)
{
case SNAT_PROTOCOL_ICMP:
inner_icmp0 = (icmp46_header_t*)l4_header;
if (clib_bihash_search_8_8 (&sm->out2in, &kv0, &value0))
{
/* or static mappings */
- if (!snat_static_mapping_match(sm, key0, &sm0, 1))
+ if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0))
{
new_dst_addr0 = sm0.addr.as_u32;
new_dst_port0 = sm0.port;
snat_session_t ** p_s0)
{
next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, thread_index, p_s0);
+ next0, thread_index, p_s0, 0);
snat_session_t * s0 = *p_s0;
if (PREDICT_TRUE(next0 != SNAT_IN2OUT_NEXT_DROP && s0))
{
snat_in2out_next_t next_index;
u32 pkts_processed = 0;
snat_main_t * sm = &snat_main;
- snat_runtime_t * rt = (snat_runtime_t *)node->runtime_data;
f64 now = vlib_time_now (vm);
u32 stats_node_index;
u32 thread_index = vlib_get_thread_index ();
{
if (is_slow_path)
{
- if (PREDICT_FALSE(snat_not_translate(sm, rt, sw_if_index0, ip0,
+ if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0, ip0,
proto0, rx_fib_index0)))
goto trace00;
{
if (is_slow_path)
{
- if (PREDICT_FALSE(snat_not_translate(sm, rt, sw_if_index1, ip1,
+ if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index1, ip1,
proto1, rx_fib_index1)))
goto trace01;
{
if (is_slow_path)
{
- if (PREDICT_FALSE(snat_not_translate(sm, rt, sw_if_index0, ip0,
+ if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0, ip0,
proto0, rx_fib_index0)))
goto trace0;
u32 pkts_processed = 0;
snat_main_t * sm = &snat_main;
u32 now = (u32) vlib_time_now (vm);
+ u32 thread_index = os_get_cpu_number ();
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
snat_det_out_key_t key0, key1;
snat_det_map_t * dm0, * dm1;
snat_det_session_t * ses0 = 0, * ses1 = 0;
+ u32 rx_fib_index0, rx_fib_index1;
+ icmp46_header_t * icmp0, * icmp1;
/* Prefetch next iteration. */
{
sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ 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 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
+
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ if (PREDICT_FALSE(proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0);
+ icmp0 = (icmp46_header_t *) udp0;
+
+ next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0,
+ rx_fib_index0, node, next0, thread_index,
+ &ses0, &dm0);
+ goto trace0;
+ }
+
dm0 = snat_det_map_by_user(sm, &ip0->src_address);
if (PREDICT_FALSE(!dm0))
{
snat_det_forward(dm0, &ip0->src_address, &new_addr0, &lo_port0);
- ses0 = snat_det_find_ses_by_in(dm0, &ip0->src_address, tcp0->src);
+ key0.ext_host_addr = ip0->dst_address;
+ key0.ext_host_port = tcp0->dst;
+
+ ses0 = snat_det_find_ses_by_in(dm0, &ip0->src_address, tcp0->src, key0);
if (PREDICT_FALSE(!ses0))
{
- key0.ext_host_addr = ip0->dst_address;
- key0.ext_host_port = tcp0->dst;
for (i0 = 0; i0 < dm0->ports_per_host; i0++)
{
key0.out_port = clib_host_to_net_u16 (lo_port0 +
}
if (PREDICT_FALSE(!ses0))
{
- next0 = SNAT_IN2OUT_NEXT_DROP;
- b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS];
+ /* too many sessions for user, send ICMP error packet */
+
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_destination_unreachable,
+ ICMP4_destination_unreachable_destination_unreachable_host,
+ 0);
+ next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
goto trace0;
}
}
new_port0 = ses0->out.out_port;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
old_addr0.as_u32 = ip0->src_address.as_u32;
ip0->src_address.as_u32 = new_addr0.as_u32;
switch(ses0->state)
{
case SNAT_SESSION_UDP_ACTIVE:
- ses0->expire = now + SNAT_UDP_TIMEOUT;
+ ses0->expire = now + sm->udp_timeout;
break;
case SNAT_SESSION_TCP_SYN_SENT:
case SNAT_SESSION_TCP_FIN_WAIT:
case SNAT_SESSION_TCP_CLOSE_WAIT:
case SNAT_SESSION_TCP_LAST_ACK:
- ses0->expire = now + SNAT_TCP_TRANSITORY_TIMEOUT;
+ ses0->expire = now + sm->tcp_transitory_timeout;
break;
case SNAT_SESSION_TCP_ESTABLISHED:
- ses0->expire = now + SNAT_TCP_ESTABLISHED_TIMEOUT;
+ ses0->expire = now + sm->tcp_established_timeout;
break;
}
sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
+ if (PREDICT_FALSE(ip1->ttl == 1))
+ {
+ vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next1 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace1;
+ }
+
+ proto1 = ip_proto_to_snat_proto (ip1->protocol);
+
+ if (PREDICT_FALSE(proto1 == SNAT_PROTOCOL_ICMP))
+ {
+ rx_fib_index1 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index1);
+ icmp1 = (icmp46_header_t *) udp1;
+
+ next1 = icmp_in2out(sm, b1, ip1, icmp1, sw_if_index1,
+ rx_fib_index1, node, next1, thread_index,
+ &ses1, &dm1);
+ goto trace1;
+ }
+
dm1 = snat_det_map_by_user(sm, &ip1->src_address);
if (PREDICT_FALSE(!dm1))
{
snat_det_forward(dm1, &ip1->src_address, &new_addr1, &lo_port1);
- ses1 = snat_det_find_ses_by_in(dm1, &ip1->src_address, tcp1->src);
+ key1.ext_host_addr = ip1->dst_address;
+ key1.ext_host_port = tcp1->dst;
+
+ ses1 = snat_det_find_ses_by_in(dm1, &ip1->src_address, tcp1->src, key1);
if (PREDICT_FALSE(!ses1))
{
- key1.ext_host_addr = ip1->dst_address;
- key1.ext_host_port = tcp1->dst;
for (i1 = 0; i1 < dm1->ports_per_host; i1++)
{
key1.out_port = clib_host_to_net_u16 (lo_port1 +
}
if (PREDICT_FALSE(!ses1))
{
- next1 = SNAT_IN2OUT_NEXT_DROP;
- b1->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS];
+ /* too many sessions for user, send ICMP error packet */
+
+ vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b1, ICMP4_destination_unreachable,
+ ICMP4_destination_unreachable_destination_unreachable_host,
+ 0);
+ next1 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
goto trace1;
}
}
new_port1 = ses1->out.out_port;
- proto1 = ip_proto_to_snat_proto (ip1->protocol);
old_addr1.as_u32 = ip1->src_address.as_u32;
ip1->src_address.as_u32 = new_addr1.as_u32;
switch(ses1->state)
{
case SNAT_SESSION_UDP_ACTIVE:
- ses1->expire = now + SNAT_UDP_TIMEOUT;
+ ses1->expire = now + sm->udp_timeout;
break;
case SNAT_SESSION_TCP_SYN_SENT:
case SNAT_SESSION_TCP_FIN_WAIT:
case SNAT_SESSION_TCP_CLOSE_WAIT:
case SNAT_SESSION_TCP_LAST_ACK:
- ses1->expire = now + SNAT_TCP_TRANSITORY_TIMEOUT;
+ ses1->expire = now + sm->tcp_transitory_timeout;
break;
case SNAT_SESSION_TCP_ESTABLISHED:
- ses1->expire = now + SNAT_TCP_ESTABLISHED_TIMEOUT;
+ ses1->expire = now + sm->tcp_established_timeout;
break;
}
snat_det_out_key_t key0;
snat_det_map_t * dm0;
snat_det_session_t * ses0 = 0;
+ u32 rx_fib_index0;
+ icmp46_header_t * icmp0;
/* speculatively enqueue b0 to the current next frame */
bi0 = from[0];
sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ 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 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace00;
+ }
+
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ if (PREDICT_FALSE(proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0);
+ icmp0 = (icmp46_header_t *) udp0;
+
+ next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0,
+ rx_fib_index0, node, next0, thread_index,
+ &ses0, &dm0);
+ goto trace00;
+ }
+
dm0 = snat_det_map_by_user(sm, &ip0->src_address);
if (PREDICT_FALSE(!dm0))
{
snat_det_forward(dm0, &ip0->src_address, &new_addr0, &lo_port0);
- ses0 = snat_det_find_ses_by_in(dm0, &ip0->src_address, tcp0->src);
+ key0.ext_host_addr = ip0->dst_address;
+ key0.ext_host_port = tcp0->dst;
+
+ ses0 = snat_det_find_ses_by_in(dm0, &ip0->src_address, tcp0->src, key0);
if (PREDICT_FALSE(!ses0))
{
- key0.ext_host_addr = ip0->dst_address;
- key0.ext_host_port = tcp0->dst;
for (i0 = 0; i0 < dm0->ports_per_host; i0++)
{
key0.out_port = clib_host_to_net_u16 (lo_port0 +
}
if (PREDICT_FALSE(!ses0))
{
- next0 = SNAT_IN2OUT_NEXT_DROP;
- b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS];
+ /* too many sessions for user, send ICMP error packet */
+
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_destination_unreachable,
+ ICMP4_destination_unreachable_destination_unreachable_host,
+ 0);
+ next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
goto trace00;
}
}
new_port0 = ses0->out.out_port;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
old_addr0.as_u32 = ip0->src_address.as_u32;
ip0->src_address.as_u32 = new_addr0.as_u32;
switch(ses0->state)
{
case SNAT_SESSION_UDP_ACTIVE:
- ses0->expire = now + SNAT_UDP_TIMEOUT;
+ ses0->expire = now + sm->udp_timeout;
break;
case SNAT_SESSION_TCP_SYN_SENT:
case SNAT_SESSION_TCP_FIN_WAIT:
case SNAT_SESSION_TCP_CLOSE_WAIT:
case SNAT_SESSION_TCP_LAST_ACK:
- ses0->expire = now + SNAT_TCP_TRANSITORY_TIMEOUT;
+ ses0->expire = now + sm->tcp_transitory_timeout;
break;
case SNAT_SESSION_TCP_ESTABLISHED:
- ses0->expire = now + SNAT_TCP_ESTABLISHED_TIMEOUT;
+ ses0->expire = now + sm->tcp_established_timeout;
break;
}
.runtime_data_bytes = sizeof (snat_runtime_t),
- .n_next_nodes = 2,
+ .n_next_nodes = 3,
/* edit / add dispositions here */
.next_nodes = {
[SNAT_IN2OUT_NEXT_DROP] = "error-drop",
[SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
+ [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
},
};
VLIB_NODE_FUNCTION_MULTIARCH (snat_det_in2out_node, snat_det_in2out_node_fn);
+/**
+ * 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] thread_index thread index
+ * @param[in,out] b0 buffer containing packet to be translated
+ * @param[out] p_proto protocol used for matching
+ * @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
+ * @param e optional parameter
+ */
+u32 icmp_match_in2out_det(snat_main_t *sm, vlib_node_runtime_t *node,
+ u32 thread_index, vlib_buffer_t *b0, u8 *p_proto,
+ snat_session_key_t *p_value,
+ u8 *p_dont_translate, void *d, void *e)
+{
+ ip4_header_t *ip0;
+ icmp46_header_t *icmp0;
+ u32 sw_if_index0;
+ u32 rx_fib_index0;
+ u8 protocol;
+ snat_det_out_key_t key0;
+ u8 dont_translate = 0;
+ u32 next0 = ~0;
+ icmp_echo_header_t *echo0, *inner_echo0 = 0;
+ ip4_header_t *inner_ip0;
+ void *l4_header = 0;
+ icmp46_header_t *inner_icmp0;
+ snat_det_map_t * dm0 = 0;
+ ip4_address_t new_addr0;
+ u16 lo_port0, i0;
+ snat_det_session_t * ses0 = 0;
+ ip4_address_t in_addr;
+ u16 in_port;
+
+ ip0 = vlib_buffer_get_current (b0);
+ icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
+ echo0 = (icmp_echo_header_t *)(icmp0+1);
+ 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);
+
+ if (!icmp_is_error_message (icmp0))
+ {
+ protocol = SNAT_PROTOCOL_ICMP;
+ in_addr = ip0->src_address;
+ in_port = echo0->identifier;
+ }
+ else
+ {
+ inner_ip0 = (ip4_header_t *)(echo0+1);
+ l4_header = ip4_next_header (inner_ip0);
+ protocol = ip_proto_to_snat_proto (inner_ip0->protocol);
+ in_addr = inner_ip0->dst_address;
+ switch (protocol)
+ {
+ case SNAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t*)l4_header;
+ inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1);
+ in_port = inner_echo0->identifier;
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ in_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;
+ }
+ }
+
+ dm0 = snat_det_map_by_user(sm, &in_addr);
+ if (PREDICT_FALSE(!dm0))
+ {
+ clib_warning("no match for internal host %U",
+ format_ip4_address, &in_addr);
+ if (PREDICT_FALSE(snat_not_translate_fast(sm, node, sw_if_index0, ip0,
+ IP_PROTOCOL_ICMP, rx_fib_index0)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
+ goto out;
+ }
+
+ snat_det_forward(dm0, &in_addr, &new_addr0, &lo_port0);
+
+ key0.ext_host_addr = ip0->dst_address;
+ key0.ext_host_port = 0;
+
+ ses0 = snat_det_find_ses_by_in(dm0, &in_addr, in_port, key0);
+ if (PREDICT_FALSE(!ses0))
+ {
+ if (PREDICT_FALSE(snat_not_translate_fast(sm, node, sw_if_index0, ip0,
+ IP_PROTOCOL_ICMP, rx_fib_index0)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
+ if (icmp0->type != ICMP4_echo_request)
+ {
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
+ for (i0 = 0; i0 < dm0->ports_per_host; i0++)
+ {
+ key0.out_port = clib_host_to_net_u16 (lo_port0 +
+ ((i0 + clib_net_to_host_u16 (echo0->identifier)) % dm0->ports_per_host));
+
+ if (snat_det_get_ses_by_out (dm0, &in_addr, key0.as_u64))
+ continue;
+
+ ses0 = snat_det_ses_create(dm0, &in_addr, echo0->identifier, &key0);
+ break;
+ }
+ if (PREDICT_FALSE(!ses0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS];
+ goto out;
+ }
+ }
+
+ if (PREDICT_FALSE(icmp0->type != ICMP4_echo_request &&
+ !icmp_is_error_message (icmp0)))
+ {
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
+
+ u32 now = (u32) vlib_time_now (sm->vlib_main);
+
+ ses0->state = SNAT_SESSION_ICMP_ACTIVE;
+ ses0->expire = now + sm->icmp_timeout;
+
+out:
+ *p_proto = protocol;
+ if (ses0)
+ {
+ p_value->addr = new_addr0;
+ p_value->fib_index = sm->outside_fib_index;
+ p_value->port = ses0->out.out_port;
+ }
+ *p_dont_translate = dont_translate;
+ if (d)
+ *(snat_det_session_t**)d = ses0;
+ if (e)
+ *(snat_det_map_t**)e = dm0;
+ return next0;
+}
+
/**********************/
/*** worker handoff ***/
/**********************/
snat_in2out_next_t next_index;
u32 pkts_processed = 0;
snat_main_t * sm = &snat_main;
- snat_runtime_t * rt = (snat_runtime_t *)node->runtime_data;
u32 stats_node_index;
stats_node_index = snat_in2out_fast_node.index;
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);
+ 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 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
+
proto0 = ip_proto_to_snat_proto (ip0->protocol);
if (PREDICT_FALSE (proto0 == ~0))
if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
{
- if (PREDICT_FALSE(snat_not_translate(sm, rt, sw_if_index0, ip0,
- proto0, rx_fib_index0)))
- goto trace0;
-
next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0,
- rx_fib_index0, node, next0, ~0, 0);
+ rx_fib_index0, node, next0, ~0, 0, 0);
goto trace0;
}
key0.port = udp0->src_port;
key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, key0, &sm0, 0))
+ if (snat_static_mapping_match(sm, key0, &sm0, 0, 0))
{
b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
next0= SNAT_IN2OUT_NEXT_DROP;
Code Review / vpp.git / blobdiff