#include <vlib/vlib.h>
#include <vnet/vnet.h>
-#include <vnet/pg/pg.h>
#include <vnet/ip/ip.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/fib/ip4_fib.h>
-#include <vnet/udp/udp.h>
+#include <vnet/udp/udp_local.h>
#include <vppinfra/error.h>
#include <nat/nat.h>
-#include <nat/nat_ipfix_logging.h>
+#include <nat/lib/ipfix_logging.h>
#include <nat/nat_inlines.h>
#include <nat/nat44/inlines.h>
-#include <nat/nat_syslog.h>
-#include <nat/nat_ha.h>
+#include <nat/lib/nat_syslog.h>
+#include <nat/nat44/ed_inlines.h>
static char *nat_out2in_ed_error_strings[] = {
#define _(sym,string) string,
u32 sw_if_index;
u32 next_index;
u32 session_index;
- u32 is_slow_path;
+ nat_translation_error_e translation_error;
+ nat_6t_flow_t i2of;
+ nat_6t_flow_t o2if;
+ clib_bihash_kv_16_8_t search_key;
+ u8 is_slow_path;
+ u8 translation_via_i2of;
+ u8 lookup_skipped;
} nat44_ed_out2in_trace_t;
static u8 *
s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag,
t->sw_if_index, t->next_index, t->session_index);
+ if (~0 != t->session_index)
+ {
+ s = format (s, ", translation result '%U' via %s",
+ format_nat_ed_translation_error, t->translation_error,
+ t->translation_via_i2of ? "i2of" : "o2if");
+ s = format (s, "\n i2of %U", format_nat_6t_flow, &t->i2of);
+ s = format (s, "\n o2if %U", format_nat_6t_flow, &t->o2if);
+ }
+ if (!t->is_slow_path)
+ {
+ if (t->lookup_skipped)
+ {
+ s = format (s, "\n lookup skipped - cached session index used");
+ }
+ else
+ {
+ s = format (s, "\n search key %U", format_ed_session_kvp,
+ &t->search_key);
+ }
+ }
return s;
}
+static int
+next_src_nat (snat_main_t *sm, ip4_header_t *ip, u16 src_port, u16 dst_port,
+ u32 thread_index, u32 rx_fib_index)
+{
+ clib_bihash_kv_16_8_t kv, value;
+
+ init_ed_k (&kv, ip->src_address, src_port, ip->dst_address, dst_port,
+ rx_fib_index, ip->protocol);
+ if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value))
+ return 1;
+
+ return 0;
+}
+
+static void create_bypass_for_fwd (snat_main_t *sm, vlib_buffer_t *b,
+ snat_session_t *s, ip4_header_t *ip,
+ u32 rx_fib_index, u32 thread_index);
+
+static snat_session_t *create_session_for_static_mapping_ed (
+ snat_main_t *sm, vlib_buffer_t *b, ip4_address_t i2o_addr, u16 i2o_port,
+ u32 i2o_fib_index, ip4_address_t o2i_addr, u16 o2i_port, u32 o2i_fib_index,
+ nat_protocol_t nat_proto, vlib_node_runtime_t *node, u32 rx_fib_index,
+ u32 thread_index, twice_nat_type_t twice_nat, lb_nat_type_t lb_nat, f64 now,
+ snat_static_mapping_t *mapping);
+
static inline u32
-icmp_out2in_ed_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)
+icmp_out2in_ed_slow_path (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip,
+ icmp46_header_t *icmp, u32 sw_if_index,
+ u32 rx_fib_index, vlib_node_runtime_t *node,
+ u32 next, f64 now, u32 thread_index,
+ snat_session_t **s_p)
{
- next0 = icmp_out2in (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, thread_index, p_s0, 0);
- snat_session_t *s0 = *p_s0;
- if (PREDICT_TRUE (next0 != NAT_NEXT_DROP && s0))
+ vlib_main_t *vm = vlib_get_main ();
+
+ ip_csum_t sum;
+ u16 checksum;
+
+ snat_session_t *s = 0;
+ u8 is_addr_only, identity_nat;
+ ip4_address_t sm_addr;
+ u16 sm_port;
+ u32 sm_fib_index;
+ snat_static_mapping_t *m;
+ u8 lookup_protocol;
+ ip4_address_t lookup_saddr, lookup_daddr;
+ u16 lookup_sport, lookup_dport;
+
+ sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
+ rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
+
+ if (nat_get_icmp_session_lookup_values (b, ip, &lookup_saddr, &lookup_sport,
+ &lookup_daddr, &lookup_dport,
+ &lookup_protocol))
{
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain
- (sm->vlib_main, b0), thread_index);
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_UNSUPPORTED_PROTOCOL];
+ next = NAT_NEXT_DROP;
+ goto out;
}
- return next0;
-}
-#ifndef CLIB_MARCH_VARIANT
-int
-nat44_o2i_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg)
-{
- snat_main_t *sm = &snat_main;
- nat44_is_idle_session_ctx_t *ctx = arg;
- snat_session_t *s;
- u64 sess_timeout_time;
- u8 proto;
- u16 r_port, l_port;
- ip4_address_t *l_addr, *r_addr;
- u32 fib_index;
- clib_bihash_kv_16_8_t ed_kv;
- int i;
- snat_address_t *a;
- snat_session_key_t key;
- snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
- ctx->thread_index);
-
- s = pool_elt_at_index (tsm->sessions, kv->value);
- sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s);
- if (ctx->now >= sess_timeout_time)
+ if (snat_static_mapping_match (
+ sm, ip->dst_address, lookup_sport, rx_fib_index,
+ ip_proto_to_nat_proto (ip->protocol), &sm_addr, &sm_port,
+ &sm_fib_index, 1, &is_addr_only, 0, 0, 0, &identity_nat, &m))
{
- l_addr = &s->in2out.addr;
- r_addr = &s->ext_host_addr;
- fib_index = s->in2out.fib_index;
- if (snat_is_unk_proto_session (s))
+ // static mapping not matched
+ if (!sm->forwarding_enabled)
{
- proto = s->in2out.port;
- r_port = 0;
- l_port = 0;
+ /* Don't NAT packet aimed at the intfc address */
+ if (!is_interface_addr (sm, node, sw_if_index,
+ ip->dst_address.as_u32))
+ {
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ next = NAT_NEXT_DROP;
+ }
}
else
{
- proto = snat_proto_to_ip_proto (s->in2out.protocol);
- l_port = s->in2out.port;
- r_port = s->ext_host_port;
- }
- if (is_twice_nat_session (s))
- {
- r_addr = &s->ext_host_nat_addr;
- r_port = s->ext_host_nat_port;
- }
- make_ed_kv (l_addr, r_addr, proto, fib_index, l_port, r_port, ~0ULL,
- &ed_kv);
- if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &ed_kv, 0))
- nat_elog_warn ("in2out_ed key del failed");
-
- if (snat_is_unk_proto_session (s))
- goto delete;
-
- snat_ipfix_logging_nat44_ses_delete (ctx->thread_index,
- s->in2out.addr.as_u32,
- s->out2in.addr.as_u32,
- s->in2out.protocol,
- s->in2out.port,
- s->out2in.port,
- s->in2out.fib_index);
-
- nat_syslog_nat44_sdel (s->user_index, s->in2out.fib_index,
- &s->in2out.addr, s->in2out.port,
- &s->ext_host_nat_addr, s->ext_host_nat_port,
- &s->out2in.addr, s->out2in.port,
- &s->ext_host_addr, s->ext_host_port,
- s->in2out.protocol, is_twice_nat_session (s));
-
- nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr,
- s->ext_host_port, s->out2in.protocol, s->out2in.fib_index,
- ctx->thread_index);
-
- if (is_twice_nat_session (s))
- {
- for (i = 0; i < vec_len (sm->twice_nat_addresses); i++)
+ if (next_src_nat (sm, ip, lookup_sport, lookup_dport, thread_index,
+ rx_fib_index))
{
- key.protocol = s->in2out.protocol;
- key.port = s->ext_host_nat_port;
- a = sm->twice_nat_addresses + i;
- if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32)
- {
- snat_free_outside_address_and_port (sm->twice_nat_addresses,
- ctx->thread_index,
- &key);
- break;
- }
+ next = NAT_NEXT_IN2OUT_ED_FAST_PATH;
}
+ else
+ {
+ create_bypass_for_fwd (sm, b, s, ip, rx_fib_index, thread_index);
+ }
+ }
+ goto out;
+ }
+
+ if (PREDICT_FALSE (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_reply &&
+ (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_request ||
+ !is_addr_only)))
+ {
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE];
+ next = NAT_NEXT_DROP;
+ goto out;
+ }
+
+ if (PREDICT_FALSE (identity_nat))
+ {
+ goto out;
+ }
+
+ /* Create session initiated by host from external network */
+ s = create_session_for_static_mapping_ed (
+ sm, b, sm_addr, sm_port, sm_fib_index, ip->dst_address, lookup_sport,
+ rx_fib_index, ip_proto_to_nat_proto (lookup_protocol), node, rx_fib_index,
+ thread_index, 0, 0, vlib_time_now (vm), m);
+ if (!s)
+ next = NAT_NEXT_DROP;
+
+ if (PREDICT_TRUE (!ip4_is_fragment (ip)))
+ {
+ sum = ip_incremental_checksum_buffer (
+ vm, b, (u8 *) icmp - (u8 *) vlib_buffer_get_current (b),
+ ntohs (ip->length) - ip4_header_bytes (ip), 0);
+ checksum = ~ip_csum_fold (sum);
+ if (checksum != 0 && checksum != 0xffff)
+ {
+ next = NAT_NEXT_DROP;
+ goto out;
}
+ }
+
+ if (PREDICT_TRUE (next != NAT_NEXT_DROP && s))
+ {
+ /* Accounting */
+ nat44_session_update_counters (
+ s, now, vlib_buffer_length_in_chain (vm, b), thread_index);
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s, thread_index);
+ }
+out:
+ if (NAT_NEXT_DROP == next && s)
+ {
+ nat_ed_session_delete (sm, s, thread_index, 1);
+ s = 0;
+ }
+ *s_p = s;
+ return next;
+}
- if (snat_is_session_static (s))
- goto delete;
+// allocate exact address based on preference
+static_always_inline int
+nat_alloc_addr_and_port_exact (snat_address_t * a,
+ u32 thread_index,
+ nat_protocol_t proto,
+ ip4_address_t * addr,
+ u16 * port,
+ u16 port_per_thread, u32 snat_thread_index)
+{
+ u32 portnum;
- snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
- &s->out2in);
- delete:
- nat44_ed_delete_session (sm, s, ctx->thread_index, 1);
+ switch (proto)
+ {
+#define _(N, j, n, s) \
+ case NAT_PROTOCOL_##N: \
+ if (a->busy_##n##_ports_per_thread[thread_index] < port_per_thread) \
+ { \
+ while (1) \
+ { \
+ portnum = (port_per_thread * \
+ snat_thread_index) + \
+ snat_random_port(0, port_per_thread - 1) + 1024; \
+ if (a->busy_##n##_port_refcounts[portnum]) \
+ continue; \
+ --a->busy_##n##_port_refcounts[portnum]; \
+ a->busy_##n##_ports_per_thread[thread_index]++; \
+ a->busy_##n##_ports++; \
+ *addr = a->addr; \
+ *port = clib_host_to_net_u16(portnum); \
+ return 0; \
+ } \
+ } \
+ break;
+ foreach_nat_protocol
+#undef _
+ default:
+ nat_elog_info ("unknown protocol");
return 1;
}
- return 0;
+ /* Totally out of translations to use... */
+ nat_ipfix_logging_addresses_exhausted (thread_index, 0);
+ return 1;
+}
+
+static_always_inline int
+nat44_ed_alloc_outside_addr_and_port (snat_address_t *addresses, u32 fib_index,
+ u32 thread_index, nat_protocol_t proto,
+ ip4_address_t *addr, u16 *port,
+ u16 port_per_thread,
+ u32 snat_thread_index)
+{
+ int i;
+ snat_address_t *a, *ga = 0;
+ u32 portnum;
+
+ for (i = 0; i < vec_len (addresses); i++)
+ {
+ a = addresses + i;
+ switch (proto)
+ {
+#define _(N, j, n, s) \
+ case NAT_PROTOCOL_##N: \
+ if (a->busy_##n##_ports_per_thread[thread_index] < port_per_thread) \
+ { \
+ if (a->fib_index == fib_index) \
+ { \
+ while (1) \
+ { \
+ portnum = (port_per_thread * snat_thread_index) + \
+ snat_random_port (0, port_per_thread - 1) + 1024; \
+ if (a->busy_##n##_port_refcounts[portnum]) \
+ continue; \
+ --a->busy_##n##_port_refcounts[portnum]; \
+ a->busy_##n##_ports_per_thread[thread_index]++; \
+ a->busy_##n##_ports++; \
+ *addr = a->addr; \
+ *port = clib_host_to_net_u16 (portnum); \
+ return 0; \
+ } \
+ } \
+ else if (a->fib_index == ~0) \
+ { \
+ ga = a; \
+ } \
+ } \
+ break;
+ foreach_nat_protocol
+#undef _
+ default : nat_elog_info ("unknown protocol");
+ return 1;
+ }
+ }
+
+ if (ga)
+ {
+ a = ga;
+ switch (proto)
+ {
+#define _(N, j, n, s) \
+ case NAT_PROTOCOL_##N: \
+ while (1) \
+ { \
+ portnum = (port_per_thread * snat_thread_index) + \
+ snat_random_port (0, port_per_thread - 1) + 1024; \
+ if (a->busy_##n##_port_refcounts[portnum]) \
+ continue; \
+ ++a->busy_##n##_port_refcounts[portnum]; \
+ a->busy_##n##_ports_per_thread[thread_index]++; \
+ a->busy_##n##_ports++; \
+ *addr = a->addr; \
+ *port = clib_host_to_net_u16 (portnum); \
+ return 0; \
+ }
+ break;
+ foreach_nat_protocol
+#undef _
+ default : nat_elog_info ("unknown protocol");
+ return 1;
+ }
+ }
+
+ /* Totally out of translations to use... */
+ nat_ipfix_logging_addresses_exhausted (thread_index, 0);
+ return 1;
}
-#endif
static snat_session_t *
-create_session_for_static_mapping_ed (snat_main_t * sm,
- vlib_buffer_t * b,
- snat_session_key_t l_key,
- snat_session_key_t e_key,
- vlib_node_runtime_t * node,
- u32 rx_fib_index,
- u32 thread_index,
- twice_nat_type_t twice_nat,
- lb_nat_type_t lb_nat, f64 now)
+create_session_for_static_mapping_ed (
+ snat_main_t *sm, vlib_buffer_t *b, ip4_address_t i2o_addr, u16 i2o_port,
+ u32 i2o_fib_index, ip4_address_t o2i_addr, u16 o2i_port, u32 o2i_fib_index,
+ nat_protocol_t nat_proto, vlib_node_runtime_t *node, u32 rx_fib_index,
+ u32 thread_index, twice_nat_type_t twice_nat, lb_nat_type_t lb_nat, f64 now,
+ snat_static_mapping_t *mapping)
{
snat_session_t *s;
ip4_header_t *ip;
udp_header_t *udp;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- clib_bihash_kv_16_8_t kv;
- snat_session_key_t eh_key;
- nat44_is_idle_session_ctx_t ctx;
if (PREDICT_FALSE
(nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index)))
return 0;
}
- s = nat_ed_session_alloc (sm, thread_index, now);
+ s = nat_ed_session_alloc (sm, thread_index, now, nat_proto);
if (!s)
{
b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_USER_SESS_EXCEEDED];
udp = ip4_next_header (ip);
s->ext_host_addr.as_u32 = ip->src_address.as_u32;
- s->ext_host_port = e_key.protocol == SNAT_PROTOCOL_ICMP ? 0 : udp->src_port;
+ s->ext_host_port = nat_proto == NAT_PROTOCOL_ICMP ? 0 : udp->src_port;
s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
if (lb_nat)
s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING;
if (lb_nat == AFFINITY_LB_NAT)
s->flags |= SNAT_SESSION_FLAG_AFFINITY;
s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
- s->out2in = e_key;
- s->in2out = l_key;
- s->in2out.protocol = s->out2in.protocol;
-
- /* Add to lookup tables */
- make_ed_kv (&e_key.addr, &s->ext_host_addr, ip->protocol,
- e_key.fib_index, e_key.port, s->ext_host_port,
- s - tsm->sessions, &kv);
- ctx.now = now;
- ctx.thread_index = thread_index;
- if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->out2in_ed, &kv,
- nat44_o2i_ed_is_idle_session_cb,
- &ctx))
- nat_elog_notice ("out2in-ed key add failed");
+ s->out2in.addr = o2i_addr;
+ s->out2in.port = o2i_port;
+ s->out2in.fib_index = o2i_fib_index;
+ s->in2out.addr = i2o_addr;
+ s->in2out.port = i2o_port;
+ s->in2out.fib_index = i2o_fib_index;
+ s->nat_proto = nat_proto;
+
+ if (NAT_PROTOCOL_ICMP == nat_proto)
+ {
+ nat_6t_o2i_flow_init (sm, thread_index, s, s->ext_host_addr, o2i_port,
+ o2i_addr, o2i_port, o2i_fib_index, ip->protocol);
+ nat_6t_flow_icmp_id_rewrite_set (&s->o2i, i2o_port);
+ }
+ else
+ {
+ nat_6t_o2i_flow_init (sm, thread_index, s, s->ext_host_addr,
+ s->ext_host_port, o2i_addr, o2i_port,
+ o2i_fib_index, ip->protocol);
+ nat_6t_flow_dport_rewrite_set (&s->o2i, i2o_port);
+ }
+ nat_6t_flow_daddr_rewrite_set (&s->o2i, i2o_addr.as_u32);
+ nat_6t_flow_txfib_rewrite_set (&s->o2i, i2o_fib_index);
+
+ if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 1))
+ {
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_HASH_ADD_FAILED];
+ nat_ed_session_delete (sm, s, thread_index, 1);
+ nat_elog_warn ("out2in flow hash add failed");
+ return 0;
+ }
if (twice_nat == TWICE_NAT || (twice_nat == TWICE_NAT_SELF &&
- ip->src_address.as_u32 == l_key.addr.as_u32))
+ ip->src_address.as_u32 == i2o_addr.as_u32))
{
- eh_key.protocol = e_key.protocol;
- if (snat_alloc_outside_address_and_port (sm->twice_nat_addresses, 0,
- thread_index, &eh_key,
- sm->port_per_thread,
- tsm->snat_thread_index))
+ int rc = 0;
+ snat_address_t *filter = 0;
+
+ // if exact address is specified use this address
+ if (is_exact_address (mapping))
+ {
+ snat_address_t *ap;
+ vec_foreach (ap, sm->twice_nat_addresses)
+ {
+ if (mapping->pool_addr.as_u32 == ap->addr.as_u32)
+ {
+ filter = ap;
+ break;
+ }
+ }
+ }
+
+ if (filter)
+ {
+ rc = nat_alloc_addr_and_port_exact (filter,
+ thread_index,
+ nat_proto,
+ &s->ext_host_nat_addr,
+ &s->ext_host_nat_port,
+ sm->port_per_thread,
+ tsm->snat_thread_index);
+ s->flags |= SNAT_SESSION_FLAG_EXACT_ADDRESS;
+ }
+ else
+ {
+ rc = nat44_ed_alloc_outside_addr_and_port (
+ sm->twice_nat_addresses, 0, thread_index, nat_proto,
+ &s->ext_host_nat_addr, &s->ext_host_nat_port, sm->port_per_thread,
+ tsm->snat_thread_index);
+ }
+
+ if (rc)
{
b->error = node->errors[NAT_OUT2IN_ED_ERROR_OUT_OF_PORTS];
- nat44_ed_delete_session (sm, s, thread_index, 1);
- if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &kv, 0))
- nat_elog_notice ("out2in-ed key del failed");
+ if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 0))
+ {
+ nat_elog_warn ("out2in flow hash del failed");
+ }
+ snat_free_outside_address_and_port (
+ sm->twice_nat_addresses, thread_index, &s->ext_host_nat_addr,
+ s->ext_host_nat_port, s->nat_proto);
+ nat_ed_session_delete (sm, s, thread_index, 1);
return 0;
}
- s->ext_host_nat_addr.as_u32 = eh_key.addr.as_u32;
- s->ext_host_nat_port = eh_key.port;
+
s->flags |= SNAT_SESSION_FLAG_TWICE_NAT;
- make_ed_kv (&l_key.addr, &s->ext_host_nat_addr, ip->protocol,
- l_key.fib_index, l_key.port, s->ext_host_nat_port,
- s - tsm->sessions, &kv);
+
+ nat_6t_flow_saddr_rewrite_set (&s->o2i, s->ext_host_nat_addr.as_u32);
+ if (NAT_PROTOCOL_ICMP == nat_proto)
+ {
+ nat_6t_flow_icmp_id_rewrite_set (&s->o2i, s->ext_host_nat_port);
+ }
+ else
+ {
+ nat_6t_flow_sport_rewrite_set (&s->o2i, s->ext_host_nat_port);
+ }
+
+ nat_6t_l3_l4_csum_calc (&s->o2i);
+
+ nat_6t_i2o_flow_init (sm, thread_index, s, i2o_addr, i2o_port,
+ s->ext_host_nat_addr, s->ext_host_nat_port,
+ i2o_fib_index, ip->protocol);
+ nat_6t_flow_daddr_rewrite_set (&s->i2o, s->ext_host_addr.as_u32);
+ if (NAT_PROTOCOL_ICMP == nat_proto)
+ {
+ nat_6t_flow_icmp_id_rewrite_set (&s->i2o, s->ext_host_port);
+ }
+ else
+ {
+ nat_6t_flow_dport_rewrite_set (&s->i2o, s->ext_host_port);
+ }
+ }
+ else
+ {
+ if (NAT_PROTOCOL_ICMP == nat_proto)
+ {
+ nat_6t_i2o_flow_init (sm, thread_index, s, i2o_addr, i2o_port,
+ s->ext_host_addr, i2o_port, i2o_fib_index,
+ ip->protocol);
+ }
+ else
+ {
+ nat_6t_i2o_flow_init (sm, thread_index, s, i2o_addr, i2o_port,
+ s->ext_host_addr, s->ext_host_port,
+ i2o_fib_index, ip->protocol);
+ }
+ }
+
+ nat_6t_flow_saddr_rewrite_set (&s->i2o, o2i_addr.as_u32);
+ if (NAT_PROTOCOL_ICMP == nat_proto)
+ {
+ nat_6t_flow_icmp_id_rewrite_set (&s->i2o, o2i_port);
}
else
{
- make_ed_kv (&l_key.addr, &s->ext_host_addr, ip->protocol,
- l_key.fib_index, l_key.port, s->ext_host_port,
- s - tsm->sessions, &kv);
+ nat_6t_flow_sport_rewrite_set (&s->i2o, o2i_port);
}
- if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, &kv,
- nat44_i2o_ed_is_idle_session_cb,
- &ctx))
- nat_elog_notice ("in2out-ed key add failed");
-
- snat_ipfix_logging_nat44_ses_create (thread_index,
- s->in2out.addr.as_u32,
- s->out2in.addr.as_u32,
- s->in2out.protocol,
- s->in2out.port,
- s->out2in.port, s->in2out.fib_index);
+
+ if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1))
+ {
+ nat_elog_notice ("in2out flow hash add failed");
+ if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 0))
+ {
+ nat_elog_warn ("out2in flow hash del failed");
+ }
+ nat_ed_session_delete (sm, s, thread_index, 1);
+ return 0;
+ }
+
+ nat_ipfix_logging_nat44_ses_create (thread_index,
+ s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->nat_proto,
+ s->in2out.port,
+ s->out2in.port, s->in2out.fib_index);
nat_syslog_nat44_sadd (s->user_index, s->in2out.fib_index,
&s->in2out.addr, s->in2out.port,
&s->ext_host_nat_addr, s->ext_host_nat_port,
&s->out2in.addr, s->out2in.port,
&s->ext_host_addr, s->ext_host_port,
- s->in2out.protocol, is_twice_nat_session (s));
+ s->nat_proto, is_twice_nat_session (s));
- nat_ha_sadd (&s->in2out.addr, s->in2out.port, &s->out2in.addr,
- s->out2in.port, &s->ext_host_addr, s->ext_host_port,
- &s->ext_host_nat_addr, s->ext_host_nat_port,
- s->in2out.protocol, s->in2out.fib_index, s->flags,
- thread_index, 0);
+ per_vrf_sessions_register_session (s, thread_index);
return s;
}
-static int
-next_src_nat (snat_main_t * sm, ip4_header_t * ip, u16 src_port,
- u16 dst_port, u32 thread_index, u32 rx_fib_index)
-{
- clib_bihash_kv_16_8_t kv, value;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
-
- make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol,
- rx_fib_index, src_port, dst_port, ~0ULL, &kv);
- if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
- return 1;
-
- return 0;
-}
-
static void
-create_bypass_for_fwd (snat_main_t * sm, vlib_buffer_t * b, ip4_header_t * ip,
- u32 rx_fib_index, u32 thread_index)
+create_bypass_for_fwd (snat_main_t *sm, vlib_buffer_t *b, snat_session_t *s,
+ ip4_header_t *ip, u32 rx_fib_index, u32 thread_index)
{
clib_bihash_kv_16_8_t kv, value;
udp_header_t *udp;
- snat_session_t *s = 0;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- f64 now = vlib_time_now (sm->vlib_main);
- u16 l_port, r_port;
+ vlib_main_t *vm = vlib_get_main ();
+ f64 now = vlib_time_now (vm);
+ u16 lookup_sport, lookup_dport;
+ u8 lookup_protocol;
+ ip4_address_t lookup_saddr, lookup_daddr;
if (ip->protocol == IP_PROTOCOL_ICMP)
{
- if (get_icmp_o2i_ed_key
- (b, ip, rx_fib_index, ~0ULL, 0, &l_port, &r_port, &kv))
+ if (nat_get_icmp_session_lookup_values (b, ip, &lookup_saddr,
+ &lookup_sport, &lookup_daddr,
+ &lookup_dport, &lookup_protocol))
return;
}
else
if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
{
udp = ip4_next_header (ip);
- l_port = udp->dst_port;
- r_port = udp->src_port;
+ lookup_sport = udp->dst_port;
+ lookup_dport = udp->src_port;
}
else
{
- l_port = 0;
- r_port = 0;
+ lookup_sport = 0;
+ lookup_dport = 0;
}
- make_ed_kv (&ip->dst_address, &ip->src_address, ip->protocol,
- rx_fib_index, l_port, r_port, ~0ULL, &kv);
+ lookup_saddr.as_u32 = ip->dst_address.as_u32;
+ lookup_daddr.as_u32 = ip->src_address.as_u32;
+ lookup_protocol = ip->protocol;
}
- if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
+ init_ed_k (&kv, lookup_saddr, lookup_sport, lookup_daddr, lookup_dport,
+ rx_fib_index, lookup_protocol);
+
+ if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value))
+ {
+ ASSERT (thread_index == ed_value_get_thread_index (&value));
+ s =
+ pool_elt_at_index (tsm->sessions,
+ ed_value_get_session_index (&value));
+ }
+ else if (ip->protocol == IP_PROTOCOL_ICMP &&
+ icmp_type_is_error_message
+ (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags))
{
- s = pool_elt_at_index (tsm->sessions, value.value);
+ return;
}
else
{
(sm, rx_fib_index, thread_index)))
return;
- s = nat_ed_session_alloc (sm, thread_index, now);
+ s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol);
if (!s)
{
nat_elog_warn ("create NAT session failed");
return;
}
- proto = ip_proto_to_snat_proto (ip->protocol);
+ proto = ip_proto_to_nat_proto (ip->protocol);
s->ext_host_addr = ip->src_address;
- s->ext_host_port = r_port;
+ s->ext_host_port = lookup_dport;
s->flags |= SNAT_SESSION_FLAG_FWD_BYPASS;
s->out2in.addr = ip->dst_address;
- s->out2in.port = l_port;
- s->out2in.protocol = proto;
- if (proto == ~0)
+ s->out2in.port = lookup_sport;
+ s->nat_proto = proto;
+ if (proto == NAT_PROTOCOL_OTHER)
{
s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
s->out2in.port = ip->protocol;
}
- s->out2in.fib_index = 0;
- s->in2out = s->out2in;
+ s->out2in.fib_index = rx_fib_index;
+ s->in2out.addr = s->out2in.addr;
+ s->in2out.port = s->out2in.port;
+ s->in2out.fib_index = s->out2in.fib_index;
+
+ nat_6t_i2o_flow_init (sm, thread_index, s, ip->dst_address, lookup_sport,
+ ip->src_address, lookup_dport, rx_fib_index,
+ ip->protocol);
+ nat_6t_flow_txfib_rewrite_set (&s->i2o, rx_fib_index);
+ if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1))
+ {
+ nat_elog_notice ("in2out flow add failed");
+ nat_ed_session_delete (sm, s, thread_index, 1);
+ return;
+ }
- kv.value = s - tsm->sessions;
- if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &kv, 1))
- nat_elog_notice ("in2out_ed key add failed");
+ per_vrf_sessions_register_session (s, thread_index);
}
if (ip->protocol == IP_PROTOCOL_TCP)
{
tcp_header_t *tcp = ip4_next_header (ip);
- if (nat44_set_tcp_session_state_o2i
- (sm, now, s, tcp->flags, tcp->ack_number, tcp->seq_number,
- thread_index))
- return;
+ nat44_set_tcp_session_state_o2i (sm, now, s, tcp->flags,
+ tcp->ack_number, tcp->seq_number,
+ thread_index);
}
/* Accounting */
nat44_session_update_lru (sm, s, thread_index);
}
-static inline void
-create_bypass_for_fwd_worker (snat_main_t * sm, vlib_buffer_t * b,
- ip4_header_t * ip, u32 rx_fib_index)
-{
- ip4_header_t ip_wkr = {
- .src_address = ip->dst_address,
- };
- u32 thread_index = sm->worker_in2out_cb (&ip_wkr, rx_fib_index, 0);
-
- create_bypass_for_fwd (sm, b, ip, rx_fib_index, thread_index);
-}
-
-#ifndef CLIB_MARCH_VARIANT
-u32
-icmp_match_out2in_ed (snat_main_t * sm, vlib_node_runtime_t * node,
- u32 thread_index, vlib_buffer_t * b, ip4_header_t * ip,
- u8 * p_proto, snat_session_key_t * p_value,
- u8 * p_dont_translate, void *d, void *e)
+static snat_session_t *
+nat44_ed_out2in_slowpath_unknown_proto (snat_main_t *sm, vlib_buffer_t *b,
+ ip4_header_t *ip, u32 rx_fib_index,
+ u32 thread_index, f64 now,
+ vlib_main_t *vm,
+ vlib_node_runtime_t *node)
{
- u32 next = ~0, sw_if_index, rx_fib_index;
- clib_bihash_kv_16_8_t kv, value;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- snat_session_t *s = 0;
- u8 dont_translate = 0, is_addr_only, identity_nat;
- snat_session_key_t e_key, l_key;
- u16 l_port, r_port;
-
- sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
- rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
+ clib_bihash_kv_8_8_t kv, value;
+ snat_static_mapping_t *m;
+ snat_session_t *s;
- if (get_icmp_o2i_ed_key
- (b, ip, rx_fib_index, ~0ULL, p_proto, &l_port, &r_port, &kv))
+ if (PREDICT_FALSE (
+ nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index)))
{
- b->error = node->errors[NAT_OUT2IN_ED_ERROR_UNSUPPORTED_PROTOCOL];
- next = NAT_NEXT_DROP;
- goto out;
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED];
+ nat_elog_notice ("maximum sessions exceeded");
+ return 0;
}
- if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
+ init_nat_k (&kv, ip->dst_address, 0, 0, 0);
+ if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
{
- /* Try to match static mapping */
- e_key.addr = ip->dst_address;
- e_key.port = l_port;
- e_key.protocol = ip_proto_to_snat_proto (ip->protocol);
- e_key.fib_index = rx_fib_index;
- if (snat_static_mapping_match
- (sm, e_key, &l_key, 1, &is_addr_only, 0, 0, 0, &identity_nat))
- {
- if (!sm->forwarding_enabled)
- {
- /* Don't NAT packet aimed at the intfc address */
- if (PREDICT_FALSE (is_interface_addr (sm, node, sw_if_index,
- ip->dst_address.as_u32)))
- {
- dont_translate = 1;
- goto out;
- }
- b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next = NAT_NEXT_DROP;
- goto out;
- }
- else
- {
- dont_translate = 1;
- if (next_src_nat (sm, ip, l_port, r_port,
- thread_index, rx_fib_index))
- {
- next = NAT_NEXT_IN2OUT_ED_FAST_PATH;
- goto out;
- }
- if (sm->num_workers > 1)
- create_bypass_for_fwd_worker (sm, b, ip, rx_fib_index);
- else
- create_bypass_for_fwd (sm, b, ip, rx_fib_index, thread_index);
- goto out;
- }
- }
-
- if (PREDICT_FALSE
- (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
- ICMP4_echo_reply
- && (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
- ICMP4_echo_request || !is_addr_only)))
- {
- b->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE];
- next = NAT_NEXT_DROP;
- goto out;
- }
-
- if (PREDICT_FALSE (identity_nat))
- {
- dont_translate = 1;
- goto out;
- }
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ return 0;
+ }
- /* Create session initiated by host from external network */
- s = create_session_for_static_mapping_ed (sm, b, l_key, e_key, node,
- rx_fib_index, thread_index, 0,
- 0,
- vlib_time_now
- (sm->vlib_main));
+ m = pool_elt_at_index (sm->static_mappings, value.value);
- if (!s)
- {
- next = NAT_NEXT_DROP;
- goto out;
- }
- }
- else
+ /* Create a new session */
+ s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol);
+ if (!s)
{
- if (PREDICT_FALSE
- (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
- ICMP4_echo_reply
- && vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
- ICMP4_echo_request
- && !icmp_type_is_error_message (vnet_buffer (b)->ip.
- reass.icmp_type_or_tcp_flags)))
- {
- b->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE];
- next = NAT_NEXT_DROP;
- goto out;
- }
-
- s = pool_elt_at_index (tsm->sessions, value.value);
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_USER_SESS_EXCEEDED];
+ nat_elog_warn ("create NAT session failed");
+ return 0;
}
-out:
- if (s)
- *p_value = s->in2out;
- *p_dont_translate = dont_translate;
- if (d)
- *(snat_session_t **) d = s;
- return next;
-}
-#endif
-static snat_session_t *
-nat44_ed_out2in_unknown_proto (snat_main_t * sm,
- vlib_buffer_t * b,
- ip4_header_t * ip,
- u32 rx_fib_index,
- u32 thread_index,
- f64 now,
- vlib_main_t * vm, vlib_node_runtime_t * node)
-{
- clib_bihash_kv_8_8_t kv, value;
- clib_bihash_kv_16_8_t s_kv, s_value;
- snat_static_mapping_t *m;
- u32 old_addr, new_addr;
- ip_csum_t sum;
- snat_session_t *s;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
-
- old_addr = ip->dst_address.as_u32;
-
- make_ed_kv (&ip->dst_address, &ip->src_address, ip->protocol, rx_fib_index,
- 0, 0, ~0ULL, &s_kv);
-
- if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
+ s->ext_host_addr.as_u32 = ip->src_address.as_u32;
+ s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
+ s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
+ s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
+ s->out2in.addr.as_u32 = ip->dst_address.as_u32;
+ s->out2in.fib_index = rx_fib_index;
+ s->in2out.addr.as_u32 = m->local_addr.as_u32;
+ s->in2out.fib_index = m->fib_index;
+ s->in2out.port = s->out2in.port = ip->protocol;
+
+ nat_6t_o2i_flow_init (sm, thread_index, s, ip->dst_address, 0,
+ ip->src_address, 0, m->fib_index, ip->protocol);
+ nat_6t_flow_saddr_rewrite_set (&s->i2o, ip->dst_address.as_u32);
+ if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1))
{
- s = pool_elt_at_index (tsm->sessions, s_value.value);
- new_addr = ip->dst_address.as_u32 = s->in2out.addr.as_u32;
+ nat_elog_notice ("in2out key add failed");
+ nat_ed_session_delete (sm, s, thread_index, 1);
+ return NULL;
}
- else
- {
- if (PREDICT_FALSE
- (nat44_ed_maximum_sessions_exceeded
- (sm, rx_fib_index, thread_index)))
- {
- b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED];
- nat_elog_notice ("maximum sessions exceeded");
- return 0;
- }
- make_sm_kv (&kv, &ip->dst_address, 0, 0, 0);
- if (clib_bihash_search_8_8
- (&sm->static_mapping_by_external, &kv, &value))
- {
- b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- return 0;
- }
-
- m = pool_elt_at_index (sm->static_mappings, value.value);
-
- new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32;
-
- /* Create a new session */
- s = nat_ed_session_alloc (sm, thread_index, now);
- if (!s)
- {
- b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_USER_SESS_EXCEEDED];
- nat_elog_warn ("create NAT session failed");
- return 0;
- }
-
- s->ext_host_addr.as_u32 = ip->src_address.as_u32;
- s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
- s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
- s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
- s->out2in.addr.as_u32 = old_addr;
- s->out2in.fib_index = rx_fib_index;
- s->in2out.addr.as_u32 = new_addr;
- s->in2out.fib_index = m->fib_index;
- s->in2out.port = s->out2in.port = ip->protocol;
-
- /* Add to lookup tables */
- s_kv.value = s - tsm->sessions;
- if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &s_kv, 1))
- nat_elog_notice ("out2in key add failed");
-
- make_ed_kv (&ip->dst_address, &ip->src_address, ip->protocol,
- m->fib_index, 0, 0, s - tsm->sessions, &s_kv);
- if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1))
- nat_elog_notice ("in2out key add failed");
+ nat_6t_o2i_flow_init (sm, thread_index, s, ip->src_address, 0,
+ ip->dst_address, 0, rx_fib_index, ip->protocol);
+ nat_6t_flow_daddr_rewrite_set (&s->o2i, m->local_addr.as_u32);
+ nat_6t_flow_txfib_rewrite_set (&s->o2i, m->fib_index);
+ if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 1))
+ {
+ nat_elog_notice ("out2in flow hash add failed");
+ nat_ed_session_delete (sm, s, thread_index, 1);
+ return NULL;
}
- /* Update IP checksum */
- sum = ip->checksum;
- sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address);
- ip->checksum = ip_csum_fold (sum);
-
- vnet_buffer (b)->sw_if_index[VLIB_TX] = s->in2out.fib_index;
+ per_vrf_sessions_register_session (s, thread_index);
/* Accounting */
nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b),
static inline uword
nat44_ed_out2in_fast_path_node_fn_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+ vlib_frame_t * frame,
+ int is_multi_worker)
{
- u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
- nat_next_t next_index;
+ u32 n_left_from, *from;
snat_main_t *sm = &snat_main;
f64 now = vlib_time_now (vm);
u32 thread_index = vm->thread_index;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets =
- 0, fragments = 0;
-
- stats_node_index = sm->ed_out2in_node_index;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
+
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
+ vlib_get_buffers (vm, from, b, n_left_from);
while (n_left_from > 0)
{
- u32 n_left_to_next;
+ vlib_buffer_t *b0;
+ u32 sw_if_index0, rx_fib_index0;
+ nat_protocol_t proto0;
+ ip4_header_t *ip0;
+ snat_session_t *s0 = 0;
+ clib_bihash_kv_16_8_t kv0, value0;
+ nat_translation_error_e translation_error = NAT_ED_TRNSL_ERR_SUCCESS;
+ nat_6t_flow_t *f = 0;
+ ip4_address_t lookup_saddr, lookup_daddr;
+ u16 lookup_sport, lookup_dport;
+ u8 lookup_protocol;
+ int lookup_skipped = 0;
+
+ b0 = *b;
+ b++;
+
+ lookup_sport = vnet_buffer (b0)->ip.reass.l4_src_port;
+ lookup_dport = vnet_buffer (b0)->ip.reass.l4_dst_port;
+
+ /* Prefetch next iteration. */
+ if (PREDICT_TRUE (n_left_from >= 2))
+ {
+ vlib_buffer_t *p2;
+
+ p2 = *b;
+
+ vlib_prefetch_buffer_header (p2, LOAD);
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
+ }
+
+ next[0] = vnet_buffer2 (b0)->nat.arc_next;
+
+ vnet_buffer (b0)->snat.flags = 0;
+ ip0 = vlib_buffer_get_current (b0);
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index0);
+
+ if (PREDICT_FALSE (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);
+ next[0] = NAT_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
+
+ proto0 = ip_proto_to_nat_proto (ip0->protocol);
- while (n_left_from > 0 && n_left_to_next > 0)
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
{
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0,
- new_addr0;
- u16 old_port0, new_port0;
- ip4_header_t *ip0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- snat_session_t *s0 = 0;
- clib_bihash_kv_16_8_t kv0, value0;
- ip_csum_t sum0;
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- next0 = vnet_buffer2 (b0)->nat.arc_next;
-
- vnet_buffer (b0)->snat.flags = 0;
- ip0 = vlib_buffer_get_current (b0);
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 =
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index0);
-
- if (PREDICT_FALSE (ip0->ttl == 1))
+ if (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_request &&
+ vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_reply &&
+ !icmp_type_is_error_message (
+ vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags))
{
- 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 = NAT_NEXT_ICMP_ERROR;
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE];
+ next[0] = NAT_NEXT_DROP;
goto trace0;
}
-
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- if (PREDICT_FALSE (proto0 == ~0))
+ int err = nat_get_icmp_session_lookup_values (
+ b0, ip0, &lookup_saddr, &lookup_sport, &lookup_daddr,
+ &lookup_dport, &lookup_protocol);
+ if (err != 0)
{
- next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
+ b0->error = node->errors[err];
+ next[0] = NAT_NEXT_DROP;
goto trace0;
}
+ }
+ else
+ {
+ lookup_saddr.as_u32 = ip0->src_address.as_u32;
+ lookup_daddr.as_u32 = ip0->dst_address.as_u32;
+ lookup_protocol = ip0->protocol;
+ }
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ /* there might be a stashed index in vnet_buffer2 from handoff or
+ * classify node, see if it can be used */
+ if (!pool_is_free_index (tsm->sessions,
+ vnet_buffer2 (b0)->nat.cached_session_index))
+ {
+ s0 = pool_elt_at_index (tsm->sessions,
+ vnet_buffer2 (b0)->nat.cached_session_index);
+ if (PREDICT_TRUE (
+ nat_6t_flow_match (&s0->o2i, b0, lookup_saddr, lookup_sport,
+ lookup_daddr, lookup_dport, lookup_protocol,
+ rx_fib_index0) ||
+ (s0->flags & SNAT_SESSION_FLAG_TWICE_NAT &&
+ nat_6t_flow_match (&s0->i2o, b0, lookup_saddr, lookup_sport,
+ lookup_daddr, lookup_dport,
+ lookup_protocol, rx_fib_index0))))
{
- next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
- goto trace0;
+ /* yes, this is the droid we're looking for */
+ lookup_skipped = 1;
+ goto skip_lookup;
}
+ s0 = NULL;
+ }
+
+ init_ed_k (&kv0, lookup_saddr, lookup_sport, lookup_daddr, lookup_dport,
+ rx_fib_index0, lookup_protocol);
+
+ // lookup flow
+ if (clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0))
+ {
+ // flow does not exist go slow path
+ next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
+ goto trace0;
+ }
+ ASSERT (thread_index == ed_value_get_thread_index (&value0));
+ s0 =
+ pool_elt_at_index (tsm->sessions,
+ ed_value_get_session_index (&value0));
+ skip_lookup:
- make_ed_kv (&ip0->dst_address, &ip0->src_address,
- ip0->protocol, rx_fib_index0,
- vnet_buffer (b0)->ip.reass.l4_dst_port,
- vnet_buffer (b0)->ip.reass.l4_src_port, ~0ULL, &kv0);
+ if (PREDICT_FALSE (per_vrf_sessions_is_expired (s0, thread_index)))
+ {
+ // session is closed, go slow path
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat_ed_session_delete (sm, s0, thread_index, 1);
+ next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
+ goto trace0;
+ }
- if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0))
+ if (s0->tcp_closed_timestamp)
+ {
+ if (now >= s0->tcp_closed_timestamp)
{
- next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
- goto trace0;
+ // session is closed, go slow path, freed in slow path
+ next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
}
- s0 = pool_elt_at_index (tsm->sessions, value0.value);
-
- if (s0->tcp_close_timestamp)
+ else
{
- if (now >= s0->tcp_close_timestamp)
- {
- // session is closed, go slow path
- next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
- }
- else
- {
- // session in transitory timeout, drop
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_TCP_CLOSED];
- next0 = NAT_NEXT_DROP;
- }
- goto trace0;
+ // session in transitory timeout, drop
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_TCP_CLOSED];
+ next[0] = NAT_NEXT_DROP;
}
+ goto trace0;
+ }
- // drop if session expired
- u64 sess_timeout_time;
- sess_timeout_time = s0->last_heard +
- (f64) nat44_session_get_timeout (sm, s0);
- if (now >= sess_timeout_time)
+ // drop if session expired
+ u64 sess_timeout_time;
+ sess_timeout_time =
+ s0->last_heard + (f64) nat44_session_get_timeout (sm, s0);
+ if (now >= sess_timeout_time)
+ {
+ // session is closed, go slow path
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat_ed_session_delete (sm, s0, thread_index, 1);
+ next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
+ goto trace0;
+ }
+
+ if (nat_6t_flow_match (&s0->o2i, b0, lookup_saddr, lookup_sport,
+ lookup_daddr, lookup_dport, lookup_protocol,
+ rx_fib_index0))
+ {
+ f = &s0->o2i;
+ }
+ else if (s0->flags & SNAT_SESSION_FLAG_TWICE_NAT &&
+ nat_6t_flow_match (&s0->i2o, b0, lookup_saddr, lookup_sport,
+ lookup_daddr, lookup_dport, lookup_protocol,
+ rx_fib_index0))
+ {
+ f = &s0->i2o;
+ }
+ else
+ {
+ /*
+ * Send DHCP packets to the ipv4 stack, or we won't
+ * be able to use dhcp client on the outside interface
+ */
+ if (PREDICT_FALSE (
+ proto0 == NAT_PROTOCOL_UDP &&
+ (vnet_buffer (b0)->ip.reass.l4_dst_port ==
+ clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_client))))
{
- // session is closed, go slow path
- nat_free_session_data (sm, s0, thread_index, 0);
- nat44_ed_delete_session (sm, s0, thread_index, 1);
- next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
goto trace0;
}
- //
-
- old_addr0 = ip0->dst_address.as_u32;
- new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32, ip4_header_t,
- src_address);
- ip0->checksum = ip_csum_fold (sum0);
-
- old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
- if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ if (!sm->forwarding_enabled)
{
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- new_port0 = udp0->dst_port = s0->in2out.port;
- sum0 = tcp0->checksum;
- sum0 =
- ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- sum0 =
- ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
- if (is_twice_nat_session (s0))
- {
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 =
- ip_csum_update (sum0,
- vnet_buffer (b0)->ip.
- reass.l4_src_port,
- s0->ext_host_nat_port, ip4_header_t,
- length);
- tcp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
- }
- tcp0->checksum = ip_csum_fold (sum0);
- }
- tcp_packets++;
- if (nat44_set_tcp_session_state_o2i
- (sm, now, s0,
- vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags,
- vnet_buffer (b0)->ip.reass.tcp_ack_number,
- vnet_buffer (b0)->ip.reass.tcp_seq_number, thread_index))
- goto trace0;
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ next[0] = NAT_NEXT_DROP;
+ goto trace0;
}
- else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
- && udp0->checksum)
+ else
{
- new_port0 = udp0->dst_port = s0->in2out.port;
- sum0 = udp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ if (nat_6t_flow_match (&s0->i2o, b0, lookup_saddr, lookup_sport,
+ lookup_daddr, lookup_dport,
+ lookup_protocol, rx_fib_index0))
{
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 =
- ip_csum_update (sum0,
- vnet_buffer (b0)->ip.reass.l4_src_port,
- s0->ext_host_nat_port, ip4_header_t,
- length);
- udp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
+ f = &s0->i2o;
}
- udp0->checksum = ip_csum_fold (sum0);
- udp_packets++;
- }
- else
- {
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
+ else
{
- new_port0 = udp0->dst_port = s0->in2out.port;
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- udp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
- }
+ // FIXME TODO bypass ???
+ // create_bypass_for_fwd (sm, b0, s0, ip0, rx_fib_index0,
+ // thread_index);
+ translation_error = NAT_ED_TRNSL_ERR_FLOW_MISMATCH;
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat_ed_session_delete (sm, s0, thread_index, 1);
+ next[0] = NAT_NEXT_DROP;
+ goto trace0;
}
- udp_packets++;
}
+ }
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0),
- thread_index);
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
+ if (NAT_ED_TRNSL_ERR_SUCCESS !=
+ (translation_error = nat_6t_flow_buf_translate (
+ sm, b0, ip0, f, proto0, 0 /* is_output_feature */)))
+ {
+ next[0] = NAT_NEXT_DROP;
+ goto trace0;
+ }
- trace0:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ switch (proto0)
+ {
+ case NAT_PROTOCOL_TCP:
+ vlib_increment_simple_counter (&sm->counters.fastpath.out2in_ed.tcp,
+ thread_index, sw_if_index0, 1);
+ nat44_set_tcp_session_state_o2i (sm, now, s0,
+ vnet_buffer (b0)->ip.
+ reass.icmp_type_or_tcp_flags,
+ vnet_buffer (b0)->ip.
+ reass.tcp_ack_number,
+ vnet_buffer (b0)->ip.
+ reass.tcp_seq_number,
+ thread_index);
+ break;
+ case NAT_PROTOCOL_UDP:
+ vlib_increment_simple_counter (&sm->counters.fastpath.out2in_ed.udp,
+ thread_index, sw_if_index0, 1);
+ break;
+ case NAT_PROTOCOL_ICMP:
+ vlib_increment_simple_counter (&sm->counters.fastpath.out2in_ed.icmp,
+ thread_index, sw_if_index0, 1);
+ break;
+ case NAT_PROTOCOL_OTHER:
+ vlib_increment_simple_counter (
+ &sm->counters.fastpath.out2in_ed.other, thread_index, sw_if_index0,
+ 1);
+ break;
+ }
+
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm, b0),
+ thread_index);
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s0, thread_index);
+
+ trace0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_ed_out2in_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next[0];
+ t->is_slow_path = 0;
+ t->translation_error = translation_error;
+ clib_memcpy (&t->search_key, &kv0, sizeof (t->search_key));
+ t->lookup_skipped = lookup_skipped;
+
+ if (s0)
{
- nat44_ed_out2in_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->is_slow_path = 0;
-
- if (s0)
- t->session_index = s0 - tsm->sessions;
- else
- t->session_index = ~0;
+ t->session_index = s0 - tsm->sessions;
+ clib_memcpy (&t->i2of, &s0->i2o, sizeof (t->i2of));
+ clib_memcpy (&t->o2if, &s0->o2i, sizeof (t->o2if));
+ t->translation_via_i2of = (&s0->i2o == f);
}
+ else
+ {
+ t->session_index = ~0;
+ }
+ }
- pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next;
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
+ if (next[0] == NAT_NEXT_DROP)
+ {
+ vlib_increment_simple_counter (&sm->counters.fastpath.
+ out2in_ed.drops, thread_index,
+ sw_if_index0, 1);
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ n_left_from--;
+ next++;
}
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_OUT2IN_PACKETS,
- pkts_processed);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_TCP_PACKETS, tcp_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_UDP_PACKETS, udp_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_ICMP_PACKETS,
- icmp_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_OTHER_PACKETS,
- other_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_FRAGMENTS, fragments);
+ vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
+ frame->n_vectors);
return frame->n_vectors;
}
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
- nat_next_t next_index;
+ u32 n_left_from, *from;
snat_main_t *sm = &snat_main;
f64 now = vlib_time_now (vm);
u32 thread_index = vm->thread_index;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets =
- 0, fragments = 0;
-
- stats_node_index = sm->ed_out2in_slowpath_node_index;
+ snat_static_mapping_t *m;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
+
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
+ vlib_get_buffers (vm, from, b, n_left_from);
while (n_left_from > 0)
{
- u32 n_left_to_next;
+ vlib_buffer_t *b0;
+ u32 sw_if_index0, rx_fib_index0;
+ nat_protocol_t proto0;
+ ip4_header_t *ip0;
+ udp_header_t *udp0;
+ icmp46_header_t *icmp0;
+ snat_session_t *s0 = 0;
+ clib_bihash_kv_16_8_t kv0, value0;
+ lb_nat_type_t lb_nat0;
+ twice_nat_type_t twice_nat0;
+ u8 identity_nat0;
+ ip4_address_t sm_addr;
+ u16 sm_port;
+ u32 sm_fib_index;
+ nat_translation_error_e translation_error = NAT_ED_TRNSL_ERR_SUCCESS;
+
+ b0 = *b;
+ next[0] = vnet_buffer2 (b0)->nat.arc_next;
+
+ vnet_buffer (b0)->snat.flags = 0;
+ ip0 = vlib_buffer_get_current (b0);
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index0);
+
+ if (PREDICT_FALSE (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);
+ next[0] = NAT_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ udp0 = ip4_next_header (ip0);
+ icmp0 = (icmp46_header_t *) udp0;
+ proto0 = ip_proto_to_nat_proto (ip0->protocol);
- while (n_left_from > 0 && n_left_to_next > 0)
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
{
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0,
- new_addr0;
- u16 old_port0, new_port0;
- ip4_header_t *ip0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- icmp46_header_t *icmp0;
- snat_session_t *s0 = 0;
- clib_bihash_kv_16_8_t kv0, value0;
- ip_csum_t sum0;
- snat_session_key_t e_key0, l_key0;
- lb_nat_type_t lb_nat0;
- twice_nat_type_t twice_nat0;
- u8 identity_nat0;
-
- /* 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 = vnet_buffer2 (b0)->nat.arc_next;
-
- vnet_buffer (b0)->snat.flags = 0;
- ip0 = vlib_buffer_get_current (b0);
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 =
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index0);
-
- if (PREDICT_FALSE (ip0->ttl == 1))
+ s0 = nat44_ed_out2in_slowpath_unknown_proto (
+ sm, b0, ip0, rx_fib_index0, thread_index, now, vm, node);
+ if (!sm->forwarding_enabled)
{
- 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 = NAT_NEXT_ICMP_ERROR;
- goto trace0;
+ if (!s0)
+ next[0] = NAT_NEXT_DROP;
}
-
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- if (PREDICT_FALSE (proto0 == ~0))
+ if (NAT_NEXT_DROP != next[0] &&
+ NAT_ED_TRNSL_ERR_SUCCESS !=
+ (translation_error = nat_6t_flow_buf_translate (
+ sm, b0, ip0, &s0->o2i, proto0, 0 /* is_output_feature */)))
{
- s0 =
- nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0,
- thread_index, now, vm, node);
- if (!sm->forwarding_enabled)
- {
- if (!s0)
- next0 = NAT_NEXT_DROP;
- }
- other_packets++;
goto trace0;
}
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ vlib_increment_simple_counter (&sm->counters.slowpath.
+ out2in_ed.other, thread_index,
+ sw_if_index0, 1);
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
+ {
+ next[0] = icmp_out2in_ed_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next[0], now, thread_index, &s0);
+
+ if (NAT_NEXT_DROP != next[0] && s0 &&
+ NAT_ED_TRNSL_ERR_SUCCESS !=
+ (translation_error = nat_6t_flow_buf_translate (
+ sm, b0, ip0, &s0->o2i, proto0, 0 /* is_output_feature */)))
{
- next0 = icmp_out2in_ed_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
- icmp_packets++;
goto trace0;
}
- make_ed_kv (&ip0->dst_address, &ip0->src_address,
- ip0->protocol, rx_fib_index0,
- vnet_buffer (b0)->ip.reass.l4_dst_port,
- vnet_buffer (b0)->ip.reass.l4_src_port, ~0ULL, &kv0);
+ vlib_increment_simple_counter (&sm->counters.slowpath.
+ out2in_ed.icmp, thread_index,
+ sw_if_index0, 1);
+ goto trace0;
+ }
- s0 = NULL;
- if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0))
- {
- s0 = pool_elt_at_index (tsm->sessions, value0.value);
+ init_ed_k (&kv0, ip0->src_address,
+ vnet_buffer (b0)->ip.reass.l4_src_port, ip0->dst_address,
+ vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
+ ip0->protocol);
- if (s0->tcp_close_timestamp && now >= s0->tcp_close_timestamp)
- {
- nat_free_session_data (sm, s0, thread_index, 0);
- nat44_ed_delete_session (sm, s0, thread_index, 1);
- s0 = NULL;
- }
+ s0 = NULL;
+ if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0))
+ {
+ ASSERT (thread_index == ed_value_get_thread_index (&value0));
+ s0 =
+ pool_elt_at_index (tsm->sessions,
+ ed_value_get_session_index (&value0));
+
+ if (s0->tcp_closed_timestamp && now >= s0->tcp_closed_timestamp)
+ {
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat_ed_session_delete (sm, s0, thread_index, 1);
+ s0 = NULL;
}
+ }
- if (!s0)
+ if (!s0)
+ {
+ /* Try to match static mapping by external address and port,
+ destination address and port in packet */
+
+ if (snat_static_mapping_match
+ (sm, ip0->dst_address,
+ vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
+ proto0, &sm_addr, &sm_port, &sm_fib_index, 1, 0,
+ &twice_nat0, &lb_nat0, &ip0->src_address, &identity_nat0, &m))
{
- /* Try to match static mapping by external address and port,
- destination address and port in packet */
- e_key0.addr = ip0->dst_address;
- e_key0.port = vnet_buffer (b0)->ip.reass.l4_dst_port;
- e_key0.protocol = proto0;
- e_key0.fib_index = rx_fib_index0;
-
- if (snat_static_mapping_match (sm, e_key0, &l_key0, 1, 0,
- &twice_nat0, &lb_nat0,
- &ip0->src_address,
- &identity_nat0))
+ /*
+ * Send DHCP packets to the ipv4 stack, or we won't
+ * be able to use dhcp client on the outside interface
+ */
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_UDP
+ && (vnet_buffer (b0)->ip.reass.l4_dst_port ==
+ clib_host_to_net_u16
+ (UDP_DST_PORT_dhcp_to_client))))
{
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP
- && (vnet_buffer (b0)->ip.
- reass.l4_dst_port ==
- clib_host_to_net_u16
- (UDP_DST_PORT_dhcp_to_client))))
- {
- goto trace0;
- }
+ goto trace0;
+ }
- if (!sm->forwarding_enabled)
+ if (!sm->forwarding_enabled)
+ {
+ b0->error =
+ node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ next[0] = NAT_NEXT_DROP;
+ }
+ else
+ {
+ if (next_src_nat
+ (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port,
+ vnet_buffer (b0)->ip.reass.l4_dst_port,
+ thread_index, rx_fib_index0))
{
- b0->error =
- node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next0 = NAT_NEXT_DROP;
+ next[0] = NAT_NEXT_IN2OUT_ED_FAST_PATH;
}
else
{
- if (next_src_nat
- (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port,
- vnet_buffer (b0)->ip.reass.l4_dst_port,
- thread_index, rx_fib_index0))
- {
- next0 = NAT_NEXT_IN2OUT_ED_FAST_PATH;
- goto trace0;
- }
- if (sm->num_workers > 1)
- create_bypass_for_fwd_worker (sm, b0, ip0,
- rx_fib_index0);
- else
- create_bypass_for_fwd (sm, b0, ip0, rx_fib_index0,
- thread_index);
+ create_bypass_for_fwd (sm, b0, s0, ip0, rx_fib_index0,
+ thread_index);
}
- goto trace0;
}
+ goto trace0;
+ }
- if (PREDICT_FALSE (identity_nat0))
- goto trace0;
+ if (PREDICT_FALSE (identity_nat0))
+ goto trace0;
- if ((proto0 == SNAT_PROTOCOL_TCP)
- && !tcp_flags_is_init (vnet_buffer (b0)->ip.
- reass.icmp_type_or_tcp_flags))
- {
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
- next0 = NAT_NEXT_DROP;
- goto trace0;
- }
+ if ((proto0 == NAT_PROTOCOL_TCP)
+ && !tcp_flags_is_init (vnet_buffer (b0)->ip.
+ reass.icmp_type_or_tcp_flags))
+ {
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
+ next[0] = NAT_NEXT_DROP;
+ goto trace0;
+ }
- /* Create session initiated by host from external network */
- s0 = create_session_for_static_mapping_ed (sm, b0, l_key0,
- e_key0, node,
- rx_fib_index0,
- thread_index,
- twice_nat0,
- lb_nat0, now);
- if (!s0)
- {
- next0 = NAT_NEXT_DROP;
- goto trace0;
- }
+ /* Create session initiated by host from external network */
+ s0 = create_session_for_static_mapping_ed (sm, b0,
+ sm_addr, sm_port,
+ sm_fib_index,
+ ip0->dst_address,
+ vnet_buffer (b0)->
+ ip.reass.l4_dst_port,
+ rx_fib_index0, proto0,
+ node, rx_fib_index0,
+ thread_index, twice_nat0,
+ lb_nat0, now, m);
+ if (!s0)
+ {
+ next[0] = NAT_NEXT_DROP;
+ goto trace0;
}
+ }
- old_addr0 = ip0->dst_address.as_u32;
- new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+ if (NAT_ED_TRNSL_ERR_SUCCESS !=
+ (translation_error = nat_6t_flow_buf_translate (
+ sm, b0, ip0, &s0->o2i, proto0, 0 /* is_output_feature */)))
+ {
+ next[0] = NAT_NEXT_DROP;
+ goto trace0;
+ }
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32, ip4_header_t,
- src_address);
- ip0->checksum = ip_csum_fold (sum0);
+ if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
+ {
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in_ed.tcp,
+ thread_index, sw_if_index0, 1);
+ nat44_set_tcp_session_state_o2i (sm, now, s0,
+ vnet_buffer (b0)->ip.
+ reass.icmp_type_or_tcp_flags,
+ vnet_buffer (b0)->ip.
+ reass.tcp_ack_number,
+ vnet_buffer (b0)->ip.
+ reass.tcp_seq_number,
+ thread_index);
+ }
+ else
+ {
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in_ed.udp,
+ thread_index, sw_if_index0, 1);
+ }
- old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm, b0),
+ thread_index);
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s0, thread_index);
- if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
- {
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- new_port0 = udp0->dst_port = s0->in2out.port;
- sum0 = tcp0->checksum;
- sum0 =
- ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- sum0 =
- ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
- if (is_twice_nat_session (s0))
- {
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 =
- ip_csum_update (sum0,
- vnet_buffer (b0)->ip.
- reass.l4_src_port,
- s0->ext_host_nat_port, ip4_header_t,
- length);
- tcp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
- }
- tcp0->checksum = ip_csum_fold (sum0);
- }
- tcp_packets++;
- if (nat44_set_tcp_session_state_o2i
- (sm, now, s0,
- vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags,
- vnet_buffer (b0)->ip.reass.tcp_ack_number,
- vnet_buffer (b0)->ip.reass.tcp_seq_number, thread_index))
- goto trace0;
- }
- else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
- && udp0->checksum)
+ trace0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_ed_out2in_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next[0];
+ t->is_slow_path = 1;
+ t->translation_error = translation_error;
+ clib_memcpy (&t->search_key, &kv0, sizeof (t->search_key));
+
+ if (s0)
{
- new_port0 = udp0->dst_port = s0->in2out.port;
- sum0 = udp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 =
- ip_csum_update (sum0,
- vnet_buffer (b0)->ip.reass.l4_src_port,
- s0->ext_host_nat_port, ip4_header_t,
- length);
- udp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
- }
- udp0->checksum = ip_csum_fold (sum0);
- udp_packets++;
+ t->session_index = s0 - tsm->sessions;
+ clib_memcpy (&t->i2of, &s0->i2o, sizeof (t->i2of));
+ clib_memcpy (&t->o2if, &s0->o2i, sizeof (t->o2if));
}
else
{
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- new_port0 = udp0->dst_port = s0->in2out.port;
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- udp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
- }
- }
- udp_packets++;
- }
-
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0),
- thread_index);
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
-
- trace0:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat44_ed_out2in_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->is_slow_path = 1;
-
- if (s0)
- t->session_index = s0 - tsm->sessions;
- else
- t->session_index = ~0;
+ t->session_index = ~0;
}
+ }
- pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next;
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
+ if (next[0] == NAT_NEXT_DROP)
+ {
+ vlib_increment_simple_counter (&sm->counters.slowpath.
+ out2in_ed.drops, thread_index,
+ sw_if_index0, 1);
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ n_left_from--;
+ next++;
+ b++;
}
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_OUT2IN_PACKETS,
- pkts_processed);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_TCP_PACKETS, tcp_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_UDP_PACKETS, udp_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_ICMP_PACKETS,
- icmp_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_OTHER_PACKETS,
- other_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_OUT2IN_ED_ERROR_FRAGMENTS, fragments);
+ vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
+ frame->n_vectors);
+
return frame->n_vectors;
}
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- return nat44_ed_out2in_fast_path_node_fn_inline (vm, node, frame);
+ if (snat_main.num_workers > 1)
+ {
+ return nat44_ed_out2in_fast_path_node_fn_inline (vm, node, frame, 1);
+ }
+ else
+ {
+ return nat44_ed_out2in_fast_path_node_fn_inline (vm, node, frame, 0);
+ }
}
/* *INDENT-OFF* */
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
nat_pre_trace_t *t = va_arg (*args, nat_pre_trace_t *);
- return format (s, "out2in next_index %d", t->next_index);
+ return format (s, "out2in next_index %d arc_next_index %d", t->next_index,
+ t->arc_next_index);
}
VLIB_NODE_FN (nat_pre_out2in_node) (vlib_main_t * vm,
Code Review / vpp.git / blobdiff