#include <vnet/fib/ip4_fib.h>
#include <snat/snat.h>
#include <snat/snat_ipfix_logging.h>
+#include <snat/snat_det.h>
#include <vppinfra/hash.h>
#include <vppinfra/error.h>
vlib_node_registration_t snat_in2out_slowpath_node;
vlib_node_registration_t snat_in2out_fast_node;
vlib_node_registration_t snat_in2out_worker_handoff_node;
+vlib_node_registration_t snat_det_in2out_node;
#define foreach_snat_in2out_error \
_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \
SNAT_IN2OUT_NEXT_LOOKUP,
SNAT_IN2OUT_NEXT_DROP,
SNAT_IN2OUT_NEXT_SLOW_PATH,
+ SNAT_IN2OUT_NEXT_ICMP_ERROR,
SNAT_IN2OUT_N_NEXT,
} snat_in2out_next_t;
+/**
+ * @brief Check if packet should be translated
+ *
+ * Packets aimed at outside interface and external addresss with active session
+ * should be translated.
+ *
+ * @param sm SNAT main
+ * @param rt SNAT runtime data
+ * @param sw_if_index0 index of the inside interface
+ * @param ip0 IPv4 header
+ * @param proto0 SNAT protocol
+ * @param rx_fib_index0 RX FIB index
+ *
+ * @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)
+{
+ 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,
+ .fp_len = 32,
+ .fp_addr = {
+ .ip4.as_u32 = ip0->dst_address.as_u32,
+ },
+ };
+
+ 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 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)
+ {
+ u32 sw_if_index = fib_entry_get_resolving_interface (fei);
+ if (sw_if_index == ~0)
+ {
+ fei = fib_table_lookup (sm->outside_fib_index, &pfx);
+ if (FIB_NODE_INDEX_INVALID != fei)
+ sw_if_index = fib_entry_get_resolving_interface (fei);
+ }
+ snat_interface_t *i;
+ pool_foreach (i, sm->interfaces,
+ ({
+ /* NAT packet aimed at outside interface */
+ if ((i->is_inside == 0) && (sw_if_index == i->sw_if_index))
+ return 0;
+ }));
+ }
+
+ return 1;
+}
+
static u32 slow_path (snat_main_t *sm, vlib_buffer_t *b0,
ip4_header_t * ip0,
u32 rx_fib_index0,
snat_session_t ** sessionp,
vlib_node_runtime_t * node,
u32 next0,
- u32 cpu_index)
+ u32 thread_index)
{
snat_user_t *u;
snat_user_key_t user_key;
u32 address_index = ~0;
u32 outside_fib_index;
uword * p;
- snat_static_mapping_key_t worker_by_out_key;
+ snat_worker_key_t worker_by_out_key;
p = hash_get (sm->ip4_main->fib_index_by_table_id, sm->outside_vrf_id);
if (! p)
}
outside_fib_index = p[0];
+ key1.protocol = key0->protocol;
user_key.addr = ip0->src_address;
user_key.fib_index = rx_fib_index0;
kv0.key = user_key.as_u64;
if (clib_bihash_search_8_8 (&sm->user_hash, &kv0, &value0))
{
/* no, make a new one */
- pool_get (sm->per_thread_data[cpu_index].users, u);
+ pool_get (sm->per_thread_data[thread_index].users, u);
memset (u, 0, sizeof (*u));
u->addr = ip0->src_address;
+ u->fib_index = rx_fib_index0;
- pool_get (sm->per_thread_data[cpu_index].list_pool, per_user_list_head_elt);
+ pool_get (sm->per_thread_data[thread_index].list_pool, per_user_list_head_elt);
u->sessions_per_user_list_head_index = per_user_list_head_elt -
- sm->per_thread_data[cpu_index].list_pool;
+ sm->per_thread_data[thread_index].list_pool;
- clib_dlist_init (sm->per_thread_data[cpu_index].list_pool,
+ clib_dlist_init (sm->per_thread_data[thread_index].list_pool,
u->sessions_per_user_list_head_index);
- kv0.value = u - sm->per_thread_data[cpu_index].users;
+ kv0.value = u - sm->per_thread_data[thread_index].users;
/* add user */
clib_bihash_add_del_8_8 (&sm->user_hash, &kv0, 1 /* is_add */);
}
else
{
- u = pool_elt_at_index (sm->per_thread_data[cpu_index].users,
+ u = pool_elt_at_index (sm->per_thread_data[thread_index].users,
value0.value);
}
/* Remove the oldest dynamic translation */
do {
oldest_per_user_translation_list_index =
- clib_dlist_remove_head (sm->per_thread_data[cpu_index].list_pool,
+ clib_dlist_remove_head (sm->per_thread_data[thread_index].list_pool,
u->sessions_per_user_list_head_index);
ASSERT (oldest_per_user_translation_list_index != ~0);
/* add it back to the end of the LRU list */
- clib_dlist_addtail (sm->per_thread_data[cpu_index].list_pool,
+ clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
u->sessions_per_user_list_head_index,
oldest_per_user_translation_list_index);
/* Get the list element */
oldest_per_user_translation_list_elt =
- pool_elt_at_index (sm->per_thread_data[cpu_index].list_pool,
+ pool_elt_at_index (sm->per_thread_data[thread_index].list_pool,
oldest_per_user_translation_list_index);
/* Get the session index from the list element */
session_index = oldest_per_user_translation_list_elt->value;
/* Get the session */
- s = pool_elt_at_index (sm->per_thread_data[cpu_index].sessions,
+ s = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
session_index);
} while (snat_is_session_static (s));
(sm, &s->out2in, s->outside_address_index);
s->outside_address_index = ~0;
- if (snat_alloc_outside_address_and_port (sm, &key1, &address_index))
+ if (snat_alloc_outside_address_and_port (sm, rx_fib_index0, &key1,
+ &address_index))
{
ASSERT(0);
{
static_mapping = 0;
/* Try to create dynamic translation */
- if (snat_alloc_outside_address_and_port (sm, &key1, &address_index))
+ if (snat_alloc_outside_address_and_port (sm, rx_fib_index0, &key1,
+ &address_index))
{
b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS];
return SNAT_IN2OUT_NEXT_DROP;
}
/* Create a new session */
- pool_get (sm->per_thread_data[cpu_index].sessions, s);
+ pool_get (sm->per_thread_data[thread_index].sessions, s);
memset (s, 0, sizeof (*s));
s->outside_address_index = address_index;
}
/* Create list elts */
- pool_get (sm->per_thread_data[cpu_index].list_pool,
+ pool_get (sm->per_thread_data[thread_index].list_pool,
per_user_translation_list_elt);
- clib_dlist_init (sm->per_thread_data[cpu_index].list_pool,
+ clib_dlist_init (sm->per_thread_data[thread_index].list_pool,
per_user_translation_list_elt -
- sm->per_thread_data[cpu_index].list_pool);
+ sm->per_thread_data[thread_index].list_pool);
per_user_translation_list_elt->value =
- s - sm->per_thread_data[cpu_index].sessions;
+ s - sm->per_thread_data[thread_index].sessions;
s->per_user_index = per_user_translation_list_elt -
- sm->per_thread_data[cpu_index].list_pool;
+ sm->per_thread_data[thread_index].list_pool;
s->per_user_list_head_index = u->sessions_per_user_list_head_index;
- clib_dlist_addtail (sm->per_thread_data[cpu_index].list_pool,
+ clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
s->per_user_list_head_index,
per_user_translation_list_elt -
- sm->per_thread_data[cpu_index].list_pool);
+ sm->per_thread_data[thread_index].list_pool);
}
s->in2out = *key0;
/* Add to translation hashes */
kv0.key = s->in2out.as_u64;
- kv0.value = s - sm->per_thread_data[cpu_index].sessions;
+ kv0.value = s - sm->per_thread_data[thread_index].sessions;
if (clib_bihash_add_del_8_8 (&sm->in2out, &kv0, 1 /* is_add */))
clib_warning ("in2out key add failed");
kv0.key = s->out2in.as_u64;
- kv0.value = s - sm->per_thread_data[cpu_index].sessions;
+ kv0.value = s - sm->per_thread_data[thread_index].sessions;
if (clib_bihash_add_del_8_8 (&sm->out2in, &kv0, 1 /* is_add */))
clib_warning ("out2in key add failed");
worker_by_out_key.port = s->out2in.port;
worker_by_out_key.fib_index = s->out2in.fib_index;
kv0.key = worker_by_out_key.as_u64;
- kv0.value = cpu_index;
+ kv0.value = thread_index;
clib_bihash_add_del_8_8 (&sm->worker_by_out, &kv0, 1);
/* log NAT event */
s->in2out.fib_index);
return next0;
}
-
-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)
+
+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;
- clib_bihash_kv_8_8_t kv0, value0;
- snat_session_t * s0;
- u32 new_addr0, old_addr0;
- u16 old_id0, new_id0;
- ip_csum_t sum0;
- snat_runtime_t * rt = (snat_runtime_t *)node->runtime_data;
+ icmp_echo_header_t *echo0, *inner_echo0 = 0;
+ ip4_header_t *inner_ip0 = 0;
+ void *l4_header = 0;
+ icmp46_header_t *inner_icmp0;
- if (PREDICT_FALSE(icmp0->type != ICMP4_echo_request))
+ echo0 = (icmp_echo_header_t *)(icmp0+1);
+
+ if (!icmp_is_error_message (icmp0))
{
- b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
- return SNAT_IN2OUT_NEXT_DROP;
+ if (PREDICT_FALSE(icmp0->type != ICMP4_echo_request))
+ return SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE;
+ key0.protocol = SNAT_PROTOCOL_ICMP;
+ key0.port = echo0->identifier;
}
-
- echo0 = (icmp_echo_header_t *)(icmp0+1);
+ else
+ {
+ inner_ip0 = (ip4_header_t *)(echo0+1);
+ l4_header = ip4_next_header (inner_ip0);
+ key0.protocol = ip_proto_to_snat_proto (inner_ip0->protocol);
+ switch (key0.protocol)
+ {
+ case SNAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t*)l4_header;
+ inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1);
+ key0.port = inner_echo0->identifier;
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ key0.port = ((tcp_udp_header_t*)l4_header)->dst_port;
+ break;
+ default:
+ 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] 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_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 thread_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.port = echo0->identifier;
- key0.protocol = SNAT_PROTOCOL_ICMP;
key0.fib_index = rx_fib_index0;
-
+
kv0.key = key0.as_u64;
-
+
if (clib_bihash_search_8_8 (&sm->in2out, &kv0, &value0))
{
- ip4_address_t * first_int_addr;
+ if (PREDICT_FALSE(snat_not_translate(sm, rt, sw_if_index0, ip0,
+ IP_PROTOCOL_ICMP, rx_fib_index0)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
- if (PREDICT_FALSE(rt->cached_sw_if_index != sw_if_index0))
+ if (icmp_is_error_message (icmp0))
{
- 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;
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
}
-
- /* Don't NAT packet aimed at the intfc address */
- if (PREDICT_FALSE(ip0->dst_address.as_u32 ==
- rt->cached_ip4_address))
- return next0;
-
+
next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
- &s0, node, next0, cpu_index);
-
+ &s0, node, next0, thread_index);
+
if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
- return next0;
+ goto out;
}
else
- s0 = pool_elt_at_index (sm->per_thread_data[cpu_index].sessions,
+ s0 = pool_elt_at_index (sm->per_thread_data[thread_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] 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_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 thread_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 thread_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, thread_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);
+ if (PREDICT_FALSE(checksum0 != 0 && checksum0 != 0xffff))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
+
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,
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
src_address /* changed member */);
ip0->checksum = ip_csum_fold (sum0);
- 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);
-
- /* 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))
+ if (!icmp_is_error_message (icmp0))
+ {
+ 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
{
- 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);
+ 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;
+ goto out;
+ }
+
+ old_addr0 = inner_ip0->dst_address.as_u32;
+ inner_ip0->dst_address = sm0.addr;
+ new_addr0 = inner_ip0->src_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);
+
+ 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 = sm0.port;
+ inner_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);
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ old_id0 = ((tcp_udp_header_t*)l4_header)->dst_port;
+ new_id0 = sm0.port;
+ ((tcp_udp_header_t*)l4_header)->dst_port = new_id0;
+
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_id0, new_id0, tcp_udp_header_t,
+ dst_port);
+ icmp0->checksum = ip_csum_fold (sum0);
+ break;
+ default:
+ ASSERT(0);
+ }
}
+out:
return next0;
}
u32 proto0)
{
snat_session_key_t key0, sm0;
- snat_static_mapping_key_t k0;
+ snat_worker_key_t k0;
snat_session_t * s0;
clib_bihash_kv_8_8_t kv0, value0;
ip_csum_t sum0;
ip4_header_t, dst_address);
ip0->checksum = ip_csum_fold (sum0);
- old_dst_port0 = tcp0->ports.dst;
+ old_dst_port0 = tcp0->dst;
if (PREDICT_TRUE(new_dst_port0 != old_dst_port0))
{
if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
{
- tcp0->ports.dst = new_dst_port0;
+ tcp0->dst = new_dst_port0;
sum0 = tcp0->checksum;
sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
ip4_header_t, dst_address);
}
}
+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 thread_index,
+ snat_session_t ** p_s0)
+{
+ next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, thread_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[thread_index].list_pool,
+ s0->per_user_index);
+ clib_dlist_addtail (sm->per_thread_data[thread_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,
snat_runtime_t * rt = (snat_runtime_t *)node->runtime_data;
f64 now = vlib_time_now (vm);
u32 stats_node_index;
- u32 cpu_index = os_get_cpu_number ();
+ u32 thread_index = vlib_get_thread_index ();
stats_node_index = is_slow_path ? snat_in2out_slowpath_node.index :
snat_in2out_node.index;
next0 = next1 = SNAT_IN2OUT_NEXT_LOOKUP;
- proto0 = ~0;
- proto0 = (ip0->protocol == IP_PROTOCOL_UDP)
- ? SNAT_PROTOCOL_UDP : proto0;
- proto0 = (ip0->protocol == IP_PROTOCOL_TCP)
- ? SNAT_PROTOCOL_TCP : proto0;
- proto0 = (ip0->protocol == IP_PROTOCOL_ICMP)
- ? SNAT_PROTOCOL_ICMP : proto0;
+ proto0 = ip_proto_to_snat_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 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace00;
+ }
/* Next configured feature, probably ip4-lookup */
if (is_slow_path)
{
next0 = icmp_in2out_slow_path
(sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0,
- node, next0, now, cpu_index);
+ node, next0, now, thread_index, &s0);
goto trace00;
}
}
{
if (is_slow_path)
{
- 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))
+ if (PREDICT_FALSE(snat_not_translate(sm, rt, sw_if_index0, ip0,
+ proto0, rx_fib_index0)))
goto trace00;
-
+
next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
- &s0, node, next0, cpu_index);
+ &s0, node, next0, thread_index);
if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
goto trace00;
}
}
}
else
- s0 = pool_elt_at_index (sm->per_thread_data[cpu_index].sessions,
+ s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
value0.value);
old_addr0 = ip0->src_address.as_u32;
if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
{
- old_port0 = tcp0->ports.src;
- tcp0->ports.src = s0->out2in.port;
- new_port0 = tcp0->ports.src;
+ 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,
/* 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,
+ clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
s0->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[cpu_index].list_pool,
+ clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
s0->per_user_list_head_index,
s0->per_user_index);
}
t->next_index = next0;
t->session_index = ~0;
if (s0)
- t->session_index = s0 - sm->per_thread_data[cpu_index].sessions;
+ t->session_index = s0 - sm->per_thread_data[thread_index].sessions;
}
pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
rx_fib_index1 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
sw_if_index1);
- proto1 = ~0;
- proto1 = (ip1->protocol == IP_PROTOCOL_UDP)
- ? SNAT_PROTOCOL_UDP : proto1;
- proto1 = (ip1->protocol == IP_PROTOCOL_TCP)
- ? SNAT_PROTOCOL_TCP : proto1;
- proto1 = (ip1->protocol == IP_PROTOCOL_ICMP)
- ? SNAT_PROTOCOL_ICMP : proto1;
+ proto1 = ip_proto_to_snat_proto (ip1->protocol);
+
+ if (PREDICT_FALSE(ip0->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);
+ next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace01;
+ }
/* Next configured feature, probably ip4-lookup */
if (is_slow_path)
{
next1 = icmp_in2out_slow_path
(sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
- next1, now, cpu_index);
+ next1, now, thread_index, &s1);
goto trace01;
}
}
{
if (is_slow_path)
{
- ip4_address_t * first_int_addr;
-
- if (PREDICT_FALSE(rt->cached_sw_if_index != sw_if_index1))
- {
- first_int_addr =
- ip4_interface_first_address (sm->ip4_main, sw_if_index1,
- 0 /* just want the address */);
- rt->cached_sw_if_index = sw_if_index1;
- 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(ip1->dst_address.as_u32 ==
- rt->cached_ip4_address))
+ if (PREDICT_FALSE(snat_not_translate(sm, rt, sw_if_index1, ip1,
+ proto1, rx_fib_index1)))
goto trace01;
-
+
next1 = slow_path (sm, b1, ip1, rx_fib_index1, &key1,
- &s1, node, next1, cpu_index);
+ &s1, node, next1, thread_index);
if (PREDICT_FALSE (next1 == SNAT_IN2OUT_NEXT_DROP))
goto trace01;
}
}
}
else
- s1 = pool_elt_at_index (sm->per_thread_data[cpu_index].sessions,
+ s1 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
value1.value);
old_addr1 = ip1->src_address.as_u32;
if (PREDICT_TRUE(proto1 == SNAT_PROTOCOL_TCP))
{
- old_port1 = tcp1->ports.src;
- tcp1->ports.src = s1->out2in.port;
- new_port1 = tcp1->ports.src;
+ old_port1 = tcp1->src_port;
+ tcp1->src_port = s1->out2in.port;
+ new_port1 = tcp1->src_port;
sum1 = tcp1->checksum;
sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
/* Per-user LRU list maintenance for dynamic translation */
if (!snat_is_session_static (s1))
{
- clib_dlist_remove (sm->per_thread_data[cpu_index].list_pool,
+ clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
s1->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[cpu_index].list_pool,
+ clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
s1->per_user_list_head_index,
s1->per_user_index);
}
t->next_index = next1;
t->session_index = ~0;
if (s1)
- t->session_index = s1 - sm->per_thread_data[cpu_index].sessions;
+ t->session_index = s1 - sm->per_thread_data[thread_index].sessions;
}
pkts_processed += next1 != SNAT_IN2OUT_NEXT_DROP;
rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
sw_if_index0);
- proto0 = ~0;
- proto0 = (ip0->protocol == IP_PROTOCOL_UDP)
- ? SNAT_PROTOCOL_UDP : proto0;
- proto0 = (ip0->protocol == IP_PROTOCOL_TCP)
- ? SNAT_PROTOCOL_TCP : proto0;
- proto0 = (ip0->protocol == IP_PROTOCOL_ICMP)
- ? SNAT_PROTOCOL_ICMP : proto0;
+ proto0 = ip_proto_to_snat_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 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
/* Next configured feature, probably ip4-lookup */
if (is_slow_path)
{
next0 = icmp_in2out_slow_path
(sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, cpu_index);
+ next0, now, thread_index, &s0);
goto trace0;
}
}
{
if (is_slow_path)
{
- 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))
+ if (PREDICT_FALSE(snat_not_translate(sm, rt, sw_if_index0, ip0,
+ proto0, rx_fib_index0)))
goto trace0;
-
+
next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
- &s0, node, next0, cpu_index);
+ &s0, node, next0, thread_index);
+
if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
goto trace0;
}
}
}
else
- s0 = pool_elt_at_index (sm->per_thread_data[cpu_index].sessions,
+ s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
value0.value);
old_addr0 = ip0->src_address.as_u32;
if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
{
- old_port0 = tcp0->ports.src;
- tcp0->ports.src = s0->out2in.port;
- new_port0 = tcp0->ports.src;
+ 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,
/* 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,
+ clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
s0->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[cpu_index].list_pool,
+ clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
s0->per_user_list_head_index,
s0->per_user_index);
}
t->next_index = next0;
t->session_index = ~0;
if (s0)
- t->session_index = s0 - sm->per_thread_data[cpu_index].sessions;
+ t->session_index = s0 - sm->per_thread_data[thread_index].sessions;
}
pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
[SNAT_IN2OUT_NEXT_DROP] = "error-drop",
[SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
[SNAT_IN2OUT_NEXT_SLOW_PATH] = "snat-in2out-slowpath",
+ [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
},
};
[SNAT_IN2OUT_NEXT_DROP] = "error-drop",
[SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
[SNAT_IN2OUT_NEXT_SLOW_PATH] = "snat-in2out-slowpath",
+ [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
},
};
VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_slowpath_node, snat_in2out_slow_path_fn);
+/**************************/
+/*** deterministic mode ***/
+/**************************/
+static uword
+snat_det_in2out_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ u32 n_left_from, * from, * to_next;
+ snat_in2out_next_t next_index;
+ u32 pkts_processed = 0;
+ snat_main_t * sm = &snat_main;
+ u32 now = (u32) vlib_time_now (vm);
+
+ 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 >= 4 && n_left_to_next >= 2)
+ {
+ u32 bi0, bi1;
+ vlib_buffer_t * b0, * b1;
+ u32 next0, next1;
+ u32 sw_if_index0, sw_if_index1;
+ ip4_header_t * ip0, * ip1;
+ ip_csum_t sum0, sum1;
+ ip4_address_t new_addr0, old_addr0, new_addr1, old_addr1;
+ u16 old_port0, new_port0, lo_port0, i0;
+ u16 old_port1, new_port1, lo_port1, i1;
+ udp_header_t * udp0, * udp1;
+ tcp_header_t * tcp0, * tcp1;
+ u32 proto0, proto1;
+ snat_det_out_key_t key0, key1;
+ snat_det_map_t * dm0, * dm1;
+ snat_det_session_t * ses0 = 0, * ses1 = 0;
+
+ /* Prefetch next iteration. */
+ {
+ vlib_buffer_t * p2, * p3;
+
+ p2 = vlib_get_buffer (vm, from[2]);
+ p3 = vlib_get_buffer (vm, from[3]);
+
+ vlib_prefetch_buffer_header (p2, LOAD);
+ vlib_prefetch_buffer_header (p3, LOAD);
+
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
+ }
+
+ /* speculatively enqueue b0 and b1 to the current next frame */
+ to_next[0] = bi0 = from[0];
+ to_next[1] = bi1 = from[1];
+ from += 2;
+ to_next += 2;
+ n_left_from -= 2;
+ n_left_to_next -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ next0 = SNAT_IN2OUT_NEXT_LOOKUP;
+ next1 = SNAT_IN2OUT_NEXT_LOOKUP;
+
+ ip0 = vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+
+ sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+
+ dm0 = snat_det_map_by_user(sm, &ip0->src_address);
+ if (PREDICT_FALSE(!dm0))
+ {
+ clib_warning("no match for internal host %U",
+ format_ip4_address, &ip0->src_address);
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
+ goto trace0;
+ }
+
+ snat_det_forward(dm0, &ip0->src_address, &new_addr0, &lo_port0);
+
+ ses0 = snat_det_find_ses_by_in(dm0, &ip0->src_address, tcp0->src);
+ 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 +
+ ((i0 + clib_net_to_host_u16 (tcp0->src)) % dm0->ports_per_host));
+
+ if (snat_det_get_ses_by_out (dm0, &ip0->src_address, key0.as_u64))
+ continue;
+
+ ses0 = snat_det_ses_create(dm0, &ip0->src_address, tcp0->src, &key0);
+ break;
+ }
+ if (PREDICT_FALSE(!ses0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS];
+ 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;
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm->outside_fib_index;
+
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
+ ip4_header_t,
+ src_address /* changed member */);
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
+ {
+ if (tcp0->flags & TCP_FLAG_SYN)
+ ses0->state = SNAT_SESSION_TCP_SYN_SENT;
+ else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_SYN_SENT)
+ ses0->state = SNAT_SESSION_TCP_ESTABLISHED;
+ else if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_ESTABLISHED)
+ ses0->state = SNAT_SESSION_TCP_FIN_WAIT;
+ else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_FIN_WAIT)
+ snat_det_ses_close(dm0, ses0);
+ else if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_CLOSE_WAIT)
+ ses0->state = SNAT_SESSION_TCP_LAST_ACK;
+ else if (tcp0->flags == 0 && ses0->state == SNAT_SESSION_UNKNOWN)
+ ses0->state = SNAT_SESSION_TCP_ESTABLISHED;
+
+ old_port0 = tcp0->src;
+ tcp0->src = new_port0;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
+ ip4_header_t,
+ dst_address /* changed member */);
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */,
+ length /* changed member */);
+ tcp0->checksum = ip_csum_fold(sum0);
+ }
+ else
+ {
+ ses0->state = SNAT_SESSION_UDP_ACTIVE;
+ old_port0 = udp0->src_port;
+ udp0->src_port = new_port0;
+ udp0->checksum = 0;
+ }
+
+ switch(ses0->state)
+ {
+ case SNAT_SESSION_UDP_ACTIVE:
+ ses0->expire = now + SNAT_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;
+ break;
+ case SNAT_SESSION_TCP_ESTABLISHED:
+ ses0->expire = now + SNAT_TCP_ESTABLISHED_TIMEOUT;
+ break;
+ }
+
+ trace0:
+ if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ snat_in2out_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->is_slow_path = 0;
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->session_index = ~0;
+ if (ses0)
+ t->session_index = ses0 - dm0->sessions;
+ }
+
+ pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
+
+ ip1 = vlib_buffer_get_current (b1);
+ udp1 = ip4_next_header (ip1);
+ tcp1 = (tcp_header_t *) udp1;
+
+ sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
+
+ dm1 = snat_det_map_by_user(sm, &ip1->src_address);
+ if (PREDICT_FALSE(!dm1))
+ {
+ clib_warning("no match for internal host %U",
+ format_ip4_address, &ip0->src_address);
+ b1->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
+ goto trace1;
+ }
+
+ snat_det_forward(dm1, &ip1->src_address, &new_addr1, &lo_port1);
+
+
+ ses1 = snat_det_find_ses_by_in(dm1, &ip1->src_address, tcp1->src);
+ 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 +
+ ((i1 + clib_net_to_host_u16 (tcp1->src)) % dm1->ports_per_host));
+
+ if (snat_det_get_ses_by_out (dm1, &ip1->src_address, key1.as_u64))
+ continue;
+
+ ses1 = snat_det_ses_create(dm1, &ip1->src_address, tcp1->src, &key1);
+ break;
+ }
+ if (PREDICT_FALSE(!ses1))
+ {
+ next1 = SNAT_IN2OUT_NEXT_DROP;
+ b1->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS];
+ 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;
+ vnet_buffer(b1)->sw_if_index[VLIB_TX] = sm->outside_fib_index;
+
+ sum1 = ip1->checksum;
+ sum1 = ip_csum_update (sum1, old_addr1.as_u32, new_addr1.as_u32,
+ ip4_header_t,
+ src_address /* changed member */);
+ ip1->checksum = ip_csum_fold (sum1);
+
+ if (PREDICT_TRUE(proto1 == SNAT_PROTOCOL_TCP))
+ {
+ if (tcp1->flags & TCP_FLAG_SYN)
+ ses1->state = SNAT_SESSION_TCP_SYN_SENT;
+ else if (tcp1->flags & TCP_FLAG_ACK && ses1->state == SNAT_SESSION_TCP_SYN_SENT)
+ ses1->state = SNAT_SESSION_TCP_ESTABLISHED;
+ else if (tcp1->flags & TCP_FLAG_FIN && ses1->state == SNAT_SESSION_TCP_ESTABLISHED)
+ ses1->state = SNAT_SESSION_TCP_FIN_WAIT;
+ else if (tcp1->flags & TCP_FLAG_ACK && ses1->state == SNAT_SESSION_TCP_FIN_WAIT)
+ snat_det_ses_close(dm1, ses1);
+ else if (tcp1->flags & TCP_FLAG_FIN && ses1->state == SNAT_SESSION_TCP_CLOSE_WAIT)
+ ses1->state = SNAT_SESSION_TCP_LAST_ACK;
+ else if (tcp1->flags == 0 && ses1->state == SNAT_SESSION_UNKNOWN)
+ ses1->state = SNAT_SESSION_TCP_ESTABLISHED;
+
+ old_port1 = tcp1->src;
+ tcp1->src = new_port1;
+
+ sum1 = tcp1->checksum;
+ sum1 = ip_csum_update (sum1, old_addr1.as_u32, new_addr1.as_u32,
+ ip4_header_t,
+ dst_address /* changed member */);
+ sum1 = ip_csum_update (sum1, old_port1, new_port1,
+ ip4_header_t /* cheat */,
+ length /* changed member */);
+ tcp1->checksum = ip_csum_fold(sum1);
+ }
+ else
+ {
+ ses1->state = SNAT_SESSION_UDP_ACTIVE;
+ old_port1 = udp1->src_port;
+ udp1->src_port = new_port1;
+ udp1->checksum = 0;
+ }
+
+ switch(ses1->state)
+ {
+ case SNAT_SESSION_UDP_ACTIVE:
+ ses1->expire = now + SNAT_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;
+ break;
+ case SNAT_SESSION_TCP_ESTABLISHED:
+ ses1->expire = now + SNAT_TCP_ESTABLISHED_TIMEOUT;
+ break;
+ }
+
+ trace1:
+ if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b1->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ snat_in2out_trace_t *t =
+ vlib_add_trace (vm, node, b1, sizeof (*t));
+ t->is_slow_path = 0;
+ t->sw_if_index = sw_if_index1;
+ t->next_index = next1;
+ t->session_index = ~0;
+ if (ses1)
+ t->session_index = ses1 - dm1->sessions;
+ }
+
+ pkts_processed += next1 != SNAT_IN2OUT_NEXT_DROP;
+
+ /* verify speculative enqueues, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t * b0;
+ u32 next0;
+ u32 sw_if_index0;
+ ip4_header_t * ip0;
+ ip_csum_t sum0;
+ ip4_address_t new_addr0, old_addr0;
+ u16 old_port0, new_port0, lo_port0, i0;
+ udp_header_t * udp0;
+ tcp_header_t * tcp0;
+ u32 proto0;
+ snat_det_out_key_t key0;
+ snat_det_map_t * dm0;
+ snat_det_session_t * ses0 = 0;
+
+ /* 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;
+
+ ip0 = vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+
+ sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+
+ dm0 = snat_det_map_by_user(sm, &ip0->src_address);
+ if (PREDICT_FALSE(!dm0))
+ {
+ clib_warning("no match for internal host %U",
+ format_ip4_address, &ip0->src_address);
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
+ goto trace00;
+ }
+
+ snat_det_forward(dm0, &ip0->src_address, &new_addr0, &lo_port0);
+
+ ses0 = snat_det_find_ses_by_in(dm0, &ip0->src_address, tcp0->src);
+ 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 +
+ ((i0 + clib_net_to_host_u16 (tcp0->src)) % dm0->ports_per_host));
+
+ if (snat_det_get_ses_by_out (dm0, &ip0->src_address, key0.as_u64))
+ continue;
+
+ ses0 = snat_det_ses_create(dm0, &ip0->src_address, tcp0->src, &key0);
+ break;
+ }
+ if (PREDICT_FALSE(!ses0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS];
+ 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;
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm->outside_fib_index;
+
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
+ ip4_header_t,
+ src_address /* changed member */);
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
+ {
+ if (tcp0->flags & TCP_FLAG_SYN)
+ ses0->state = SNAT_SESSION_TCP_SYN_SENT;
+ else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_SYN_SENT)
+ ses0->state = SNAT_SESSION_TCP_ESTABLISHED;
+ else if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_ESTABLISHED)
+ ses0->state = SNAT_SESSION_TCP_FIN_WAIT;
+ else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_FIN_WAIT)
+ snat_det_ses_close(dm0, ses0);
+ else if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_CLOSE_WAIT)
+ ses0->state = SNAT_SESSION_TCP_LAST_ACK;
+ else if (tcp0->flags == 0 && ses0->state == SNAT_SESSION_UNKNOWN)
+ ses0->state = SNAT_SESSION_TCP_ESTABLISHED;
+
+ old_port0 = tcp0->src;
+ tcp0->src = new_port0;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
+ ip4_header_t,
+ dst_address /* changed member */);
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */,
+ length /* changed member */);
+ tcp0->checksum = ip_csum_fold(sum0);
+ }
+ else
+ {
+ ses0->state = SNAT_SESSION_UDP_ACTIVE;
+ old_port0 = udp0->src_port;
+ udp0->src_port = new_port0;
+ udp0->checksum = 0;
+ }
+
+ switch(ses0->state)
+ {
+ case SNAT_SESSION_UDP_ACTIVE:
+ ses0->expire = now + SNAT_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;
+ break;
+ case SNAT_SESSION_TCP_ESTABLISHED:
+ ses0->expire = now + SNAT_TCP_ESTABLISHED_TIMEOUT;
+ break;
+ }
+
+ trace00:
+ if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ snat_in2out_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->is_slow_path = 0;
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->session_index = ~0;
+ if (ses0)
+ t->session_index = ses0 - dm0->sessions;
+ }
+
+ 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);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ vlib_node_increment_counter (vm, snat_det_in2out_node.index,
+ SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
+ pkts_processed);
+ return frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (snat_det_in2out_node) = {
+ .function = snat_det_in2out_node_fn,
+ .name = "snat-det-in2out",
+ .vector_size = sizeof (u32),
+ .format_trace = format_snat_in2out_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(snat_in2out_error_strings),
+ .error_strings = snat_in2out_error_strings,
+
+ .runtime_data_bytes = sizeof (snat_runtime_t),
+
+ .n_next_nodes = 2,
+
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
+ [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (snat_det_in2out_node, snat_det_in2out_node_fn);
+
+/**********************/
+/*** worker handoff ***/
+/**********************/
static uword
snat_in2out_worker_handoff_fn (vlib_main_t * vm,
vlib_node_runtime_t * node,
u32 n_left_to_next_worker = 0, *to_next_worker = 0;
u32 next_worker_index = 0;
u32 current_worker_index = ~0;
- u32 cpu_index = os_get_cpu_number ();
+ u32 thread_index = vlib_get_thread_index ();
ASSERT (vec_len (sm->workers));
u32 sw_if_index0;
u32 rx_fib_index0;
ip4_header_t * ip0;
- snat_user_key_t key0;
- clib_bihash_kv_8_8_t kv0, value0;
u8 do_handoff;
bi0 = from[0];
ip0 = vlib_buffer_get_current (b0);
- key0.addr = ip0->src_address;
- key0.fib_index = rx_fib_index0;
-
- kv0.key = key0.as_u64;
-
- /* Ever heard of of the "user" before? */
- if (clib_bihash_search_8_8 (&sm->worker_by_in, &kv0, &value0))
- {
- /* No, assign next available worker (RR) */
- next_worker_index = sm->first_worker_index +
- sm->workers[sm->next_worker++ % vec_len (sm->workers)];
-
- /* add non-traslated packets worker lookup */
- kv0.value = next_worker_index;
- clib_bihash_add_del_8_8 (&sm->worker_by_in, &kv0, 1);
- }
- else
- next_worker_index = value0.value;
+ next_worker_index = sm->worker_in2out_cb(ip0, rx_fib_index0);
- if (PREDICT_FALSE (next_worker_index != cpu_index))
+ if (PREDICT_FALSE (next_worker_index != thread_index))
{
do_handoff = 1;
/* if this is 1st frame */
if (!f)
{
- f = vlib_get_frame_to_node (vm, snat_in2out_node.index);
+ f = vlib_get_frame_to_node (vm, sm->in2out_node_index);
to_next = vlib_frame_vector_args (f);
}
}
if (f)
- vlib_put_frame_to_node (vm, snat_in2out_node.index, f);
+ vlib_put_frame_to_node (vm, sm->in2out_node_index, f);
if (hf)
hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_worker_handoff_node, snat_in2out_worker_handoff_fn);
-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))
- {
- 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_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,
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);
- proto0 = ~0;
- proto0 = (ip0->protocol == IP_PROTOCOL_UDP)
- ? SNAT_PROTOCOL_UDP : proto0;
- proto0 = (ip0->protocol == IP_PROTOCOL_TCP)
- ? SNAT_PROTOCOL_TCP : proto0;
- proto0 = (ip0->protocol == IP_PROTOCOL_ICMP)
- ? SNAT_PROTOCOL_ICMP : proto0;
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
if (PREDICT_FALSE (proto0 == ~0))
goto trace0;
if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
{
- 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;
- rt->cached_ip4_address = first_int_addr->as_u32;
- }
-
- /* Don't NAT packet aimed at the intfc address */
- if (PREDICT_FALSE(ip0->dst_address.as_u32 ==
- rt->cached_ip4_address))
+ if (PREDICT_FALSE(snat_not_translate(sm, rt, sw_if_index0, ip0,
+ 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;
}
{
if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
{
- old_port0 = tcp0->ports.src;
- tcp0->ports.src = new_port0;
+ old_port0 = tcp0->src_port;
+ tcp0->src_port = new_port0;
sum0 = tcp0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
[SNAT_IN2OUT_NEXT_DROP] = "error-drop",
[SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
[SNAT_IN2OUT_NEXT_SLOW_PATH] = "snat-in2out-slowpath",
+ [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
},
};
Code Review / vpp.git / blobdiff