#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/nat_reass.h>
+#include <nat/lib/ipfix_logging.h>
#include <nat/nat_inlines.h>
-#include <nat/nat_syslog.h>
-#include <nat/nat_ha.h>
-
-#define foreach_nat_out2in_ed_error \
-_(UNSUPPORTED_PROTOCOL, "unsupported protocol") \
-_(OUT2IN_PACKETS, "good out2in packets processed") \
-_(OUT_OF_PORTS, "out of ports") \
-_(BAD_ICMP_TYPE, "unsupported ICMP type") \
-_(NO_TRANSLATION, "no translation") \
-_(MAX_SESSIONS_EXCEEDED, "maximum sessions exceeded") \
-_(DROP_FRAGMENT, "drop fragment") \
-_(MAX_REASS, "maximum reassemblies exceeded") \
-_(MAX_FRAG, "maximum fragments per reassembly exceeded")\
-_(NON_SYN, "non-SYN packet try to create session") \
-_(TCP_PACKETS, "TCP packets") \
-_(UDP_PACKETS, "UDP packets") \
-_(ICMP_PACKETS, "ICMP packets") \
-_(OTHER_PACKETS, "other protocol packets") \
-_(FRAGMENTS, "fragments") \
-_(CACHED_FRAGMENTS, "cached fragments") \
-_(PROCESSED_FRAGMENTS, "processed fragments")
-
-typedef enum
-{
-#define _(sym,str) NAT_OUT2IN_ED_ERROR_##sym,
- foreach_nat_out2in_ed_error
-#undef _
- NAT_OUT2IN_ED_N_ERROR,
-} nat_out2in_ed_error_t;
+#include <nat/nat44/inlines.h>
+#include <nat/lib/nat_syslog.h>
+#include <nat/nat44/ed_inlines.h>
static char *nat_out2in_ed_error_strings[] = {
#define _(sym,string) string,
#undef _
};
-typedef enum
-{
- NAT44_ED_OUT2IN_NEXT_DROP,
- NAT44_ED_OUT2IN_NEXT_LOOKUP,
- NAT44_ED_OUT2IN_NEXT_ICMP_ERROR,
- NAT44_ED_OUT2IN_NEXT_IN2OUT,
- NAT44_ED_OUT2IN_NEXT_SLOW_PATH,
- NAT44_ED_OUT2IN_NEXT_REASS,
- NAT44_ED_OUT2IN_N_NEXT,
-} nat44_ed_out2in_next_t;
-
typedef struct
{
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 != NAT44_ED_OUT2IN_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;
- nat_ed_ses_key_t ed_key;
- 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))
{
- ed_key.l_addr = s->in2out.addr;
- ed_key.r_addr = s->ext_host_addr;
- ed_key.fib_index = s->in2out.fib_index;
- if (snat_is_unk_proto_session (s))
+ // static mapping not matched
+ if (!sm->forwarding_enabled)
{
- ed_key.proto = s->in2out.port;
- ed_key.r_port = 0;
- ed_key.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
{
- ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
- ed_key.l_port = s->in2out.port;
- ed_key.r_port = s->ext_host_port;
- }
- if (is_twice_nat_session (s))
- {
- ed_key.r_addr = s->ext_host_nat_addr;
- ed_key.r_port = s->ext_host_nat_port;
- }
- ed_kv.key[0] = ed_key.as_u64[0];
- ed_kv.key[1] = ed_key.as_u64[1];
- if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &ed_kv, 0))
- nat_log_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_delete_session (sm, s, ctx->thread_index);
+ 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 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;
- snat_user_t *u;
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 (maximum_sessions_exceeded (sm, thread_index)))
+ 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_log_notice ("maximum sessions exceeded");
- return 0;
- }
-
- u = nat_user_get_or_create (sm, &l_key.addr, l_key.fib_index, thread_index);
- if (!u)
- {
- nat_log_warn ("create NAT user failed");
+ nat_elog_notice ("maximum sessions exceeded");
return 0;
}
- s = nat_ed_session_alloc (sm, u, thread_index, now);
+ s = nat_ed_session_alloc (sm, thread_index, now, nat_proto);
if (!s)
{
- nat44_delete_user_with_no_session (sm, u, thread_index);
- nat_log_warn ("create NAT session failed");
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_USER_SESS_EXCEEDED];
+ nat_elog_warn ("create NAT session failed");
return 0;
}
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;
- user_session_increment (sm, u, 1);
-
- /* Add to lookup tables */
- make_ed_kv (&kv, &e_key.addr, &s->ext_host_addr, ip->protocol,
- e_key.fib_index, e_key.port, s->ext_host_port);
- kv.value = s - tsm->sessions;
- 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_log_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_delete_session (sm, s, thread_index);
- if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &kv, 0))
- nat_log_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 (&kv, &l_key.addr, &s->ext_host_nat_addr, ip->protocol,
- l_key.fib_index, l_key.port, s->ext_host_nat_port);
+
+ 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
{
- make_ed_kv (&kv, &l_key.addr, &s->ext_host_addr, ip->protocol,
- l_key.fib_index, l_key.port, s->ext_host_port);
+ 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);
+ }
}
- kv.value = s - tsm->sessions;
- if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, &kv,
- nat44_i2o_ed_is_idle_session_cb,
- &ctx))
- nat_log_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);
-
- 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));
-
- 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);
-
- return s;
-}
-
-static_always_inline int
-icmp_get_ed_key (ip4_header_t * ip0, nat_ed_ses_key_t * p_key0)
-{
- icmp46_header_t *icmp0;
- nat_ed_ses_key_t key0;
- icmp_echo_header_t *echo0, *inner_echo0 = 0;
- ip4_header_t *inner_ip0;
- void *l4_header = 0;
- icmp46_header_t *inner_icmp0;
-
- icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
- echo0 = (icmp_echo_header_t *) (icmp0 + 1);
- if (!icmp_is_error_message (icmp0))
+ nat_6t_flow_saddr_rewrite_set (&s->i2o, o2i_addr.as_u32);
+ if (NAT_PROTOCOL_ICMP == nat_proto)
{
- key0.proto = IP_PROTOCOL_ICMP;
- key0.l_addr = ip0->dst_address;
- key0.r_addr = ip0->src_address;
- key0.l_port = echo0->identifier;
- key0.r_port = 0;
+ nat_6t_flow_icmp_id_rewrite_set (&s->i2o, o2i_port);
}
else
{
- inner_ip0 = (ip4_header_t *) (echo0 + 1);
- l4_header = ip4_next_header (inner_ip0);
- key0.proto = inner_ip0->protocol;
- key0.l_addr = inner_ip0->src_address;
- key0.r_addr = inner_ip0->dst_address;
- switch (ip_proto_to_snat_proto (inner_ip0->protocol))
+ nat_6t_flow_sport_rewrite_set (&s->i2o, o2i_port);
+ }
+
+ 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))
{
- case SNAT_PROTOCOL_ICMP:
- inner_icmp0 = (icmp46_header_t *) l4_header;
- inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
- key0.l_port = inner_echo0->identifier;
- key0.r_port = 0;
- break;
- case SNAT_PROTOCOL_UDP:
- case SNAT_PROTOCOL_TCP:
- key0.l_port = ((tcp_udp_header_t *) l4_header)->src_port;
- key0.r_port = ((tcp_udp_header_t *) l4_header)->dst_port;
- break;
- default:
- return -1;
+ nat_elog_warn ("out2in flow hash del failed");
}
+ nat_ed_session_delete (sm, s, thread_index, 1);
+ return 0;
}
- *p_key0 = key0;
- return 0;
-}
-static int
-next_src_nat (snat_main_t * sm, ip4_header_t * ip, u8 proto, 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];
+ 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);
- make_ed_kv (&kv, &ip->src_address, &ip->dst_address, proto,
- rx_fib_index, src_port, dst_port);
- if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
- return 1;
+ 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->nat_proto, is_twice_nat_session (s));
- return 0;
+ per_vrf_sessions_register_session (s, thread_index);
+
+ return s;
}
static void
-create_bypass_for_fwd (snat_main_t * sm, 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)
{
- nat_ed_ses_key_t key;
clib_bihash_kv_16_8_t kv, value;
udp_header_t *udp;
- snat_user_t *u;
- 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);
+ 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 (icmp_get_ed_key (ip, &key))
+ 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);
- key.r_addr = ip->src_address;
- key.l_addr = ip->dst_address;
- key.proto = ip->protocol;
- key.l_port = udp->dst_port;
- key.r_port = udp->src_port;
- }
else
{
- key.r_addr = ip->src_address;
- key.l_addr = ip->dst_address;
- key.proto = ip->protocol;
- key.l_port = key.r_port = 0;
+ if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
+ {
+ udp = ip4_next_header (ip);
+ lookup_sport = udp->dst_port;
+ lookup_dport = udp->src_port;
+ }
+ else
+ {
+ lookup_sport = 0;
+ lookup_dport = 0;
+ }
+ lookup_saddr.as_u32 = ip->dst_address.as_u32;
+ lookup_daddr.as_u32 = ip->src_address.as_u32;
+ lookup_protocol = ip->protocol;
}
- key.fib_index = 0;
- kv.key[0] = key.as_u64[0];
- kv.key[1] = key.as_u64[1];
- 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
{
- if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index)))
+ u32 proto;
+
+ if (PREDICT_FALSE
+ (nat44_ed_maximum_sessions_exceeded
+ (sm, rx_fib_index, thread_index)))
return;
- u = nat_user_get_or_create (sm, &ip->dst_address, sm->inside_fib_index,
- thread_index);
- if (!u)
+ s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol);
+ if (!s)
{
- nat_log_warn ("create NAT user failed");
+ nat_elog_warn ("create NAT session failed");
return;
}
- s = nat_ed_session_alloc (sm, u, thread_index, now);
- if (!s)
+ proto = ip_proto_to_nat_proto (ip->protocol);
+
+ s->ext_host_addr = ip->src_address;
+ s->ext_host_port = lookup_dport;
+ s->flags |= SNAT_SESSION_FLAG_FWD_BYPASS;
+ s->out2in.addr = ip->dst_address;
+ s->out2in.port = lookup_sport;
+ s->nat_proto = proto;
+ if (proto == NAT_PROTOCOL_OTHER)
{
- nat44_delete_user_with_no_session (sm, u, thread_index);
- nat_log_warn ("create NAT session failed");
+ s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
+ s->out2in.port = ip->protocol;
+ }
+ 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;
}
- s->ext_host_addr = key.r_addr;
- s->ext_host_port = key.r_port;
- s->flags |= SNAT_SESSION_FLAG_FWD_BYPASS;
- s->out2in.addr = key.l_addr;
- s->out2in.port = key.l_port;
- s->out2in.protocol = ip_proto_to_snat_proto (key.proto);
- s->out2in.fib_index = 0;
- s->in2out = s->out2in;
- user_session_increment (sm, u, 0);
-
- kv.value = s - tsm->sessions;
- if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &kv, 1))
- nat_log_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, s, tcp, 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);
}
-#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;
- icmp46_header_t *icmp;
- nat_ed_ses_key_t key;
- 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;
-
- icmp = (icmp46_header_t *) ip4_next_header (ip);
- 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 (icmp_get_ed_key (ip, &key))
+ 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 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto out;
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED];
+ nat_elog_notice ("maximum sessions exceeded");
+ return 0;
}
- key.fib_index = rx_fib_index;
- kv.key[0] = key.as_u64[0];
- kv.key[1] = key.as_u64[1];
- 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 = key.l_port;
- e_key.protocol = ip_proto_to_snat_proto (key.proto);
- 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 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto out;
- }
- else
- {
- dont_translate = 1;
- if (next_src_nat (sm, ip, key.proto, key.l_port, key.r_port,
- thread_index, rx_fib_index))
- {
- next = NAT44_ED_OUT2IN_NEXT_IN2OUT;
- goto out;
- }
- create_bypass_for_fwd (sm, ip, rx_fib_index, thread_index);
- goto out;
- }
- }
-
- if (PREDICT_FALSE (icmp->type != ICMP4_echo_reply &&
- (icmp->type != ICMP4_echo_request || !is_addr_only)))
- {
- b->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE];
- next = NAT44_ED_OUT2IN_NEXT_DROP;
- goto out;
- }
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ return 0;
+ }
- if (PREDICT_FALSE (identity_nat))
- {
- dont_translate = 1;
- goto out;
- }
+ m = pool_elt_at_index (sm->static_mappings, value.value);
- /* Create session initiated by host from external network */
- s = create_session_for_static_mapping_ed (sm, b, l_key, e_key, node,
- thread_index, 0, 0,
- vlib_time_now
- (sm->vlib_main));
+ /* Create a new session */
+ s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol);
+ if (!s)
+ {
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_USER_SESS_EXCEEDED];
+ nat_elog_warn ("create NAT session failed");
+ return 0;
+ }
- if (!s)
- {
- next = NAT44_ED_OUT2IN_NEXT_DROP;
- goto out;
- }
- }
- else
+ 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))
{
- if (PREDICT_FALSE (icmp->type != ICMP4_echo_reply &&
- icmp->type != ICMP4_echo_request &&
- !icmp_is_error_message (icmp)))
- {
- b->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE];
- next = NAT44_ED_OUT2IN_NEXT_DROP;
- goto out;
- }
-
- s = pool_elt_at_index (tsm->sessions, value.value);
+ nat_elog_notice ("in2out key add failed");
+ nat_ed_session_delete (sm, s, thread_index, 1);
+ return NULL;
}
- *p_proto = ip_proto_to_snat_proto (key.proto);
-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];
- snat_user_t *u;
-
- old_addr = ip->dst_address.as_u32;
-
- make_ed_kv (&s_kv, &ip->dst_address, &ip->src_address, ip->protocol,
- rx_fib_index, 0, 0);
-
- if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
+ 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))
{
- 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 ("out2in flow hash add failed");
+ nat_ed_session_delete (sm, s, thread_index, 1);
+ return NULL;
}
- else
- {
- if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index)))
- {
- b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED];
- nat_log_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;
-
- u = nat_user_get_or_create (sm, &m->local_addr, m->fib_index,
- thread_index);
- if (!u)
- {
- nat_log_warn ("create NAT user failed");
- return 0;
- }
-
- /* Create a new session */
- s = nat_ed_session_alloc (sm, u, thread_index, now);
- if (!s)
- {
- nat44_delete_user_with_no_session (sm, u, thread_index);
- nat_log_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;
- user_session_increment (sm, u, 1);
-
- /* Add to lookup tables */
- s_kv.value = s - tsm->sessions;
- if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &s_kv, 1))
- nat_log_notice ("out2in key add failed");
-
- make_ed_kv (&s_kv, &ip->dst_address, &ip->src_address, ip->protocol,
- m->fib_index, 0, 0);
- s_kv.value = s - tsm->sessions;
- if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1))
- nat_log_notice ("in2out key add failed");
- }
-
- /* 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_node_fn_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame, int is_slow_path)
+nat44_ed_out2in_fast_path_node_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame,
+ int is_multi_worker)
{
- u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
- nat44_ed_out2in_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 = is_slow_path ? sm->ed_out2in_slowpath_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_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from >= 4 && n_left_to_next >= 2)
+ 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))
{
- u32 bi0, bi1;
- vlib_buffer_t *b0, *b1;
- u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0,
- new_addr0;
- u32 next1, sw_if_index1, rx_fib_index1, proto1, old_addr1,
- new_addr1;
- u16 old_port0, new_port0, old_port1, new_port1;
- ip4_header_t *ip0, *ip1;
- udp_header_t *udp0, *udp1;
- tcp_header_t *tcp0, *tcp1;
- icmp46_header_t *icmp0, *icmp1;
- snat_session_t *s0 = 0, *s1 = 0;
- clib_bihash_kv_16_8_t kv0, value0, kv1, value1;
- ip_csum_t sum0, sum1;
- snat_session_key_t e_key0, l_key0, e_key1, l_key1;
- lb_nat_type_t lb_nat0, lb_nat1;
- twice_nat_type_t twice_nat0, twice_nat1;
- u8 identity_nat0, identity_nat1;
-
- /* Prefetch next iteration. */
- {
- vlib_buffer_t *p2, *p3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
+ vlib_buffer_t *p2;
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
+ p2 = *b;
- CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
- CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
- }
+ vlib_prefetch_buffer_header (p2, LOAD);
- /* 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;
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
+ }
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
+ next[0] = vnet_buffer2 (b0)->nat.arc_next;
- next0 = NAT44_ED_OUT2IN_NEXT_LOOKUP;
- vnet_buffer (b0)->snat.flags = 0;
- ip0 = vlib_buffer_get_current (b0);
+ 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);
+ 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);
- next0 = NAT44_ED_OUT2IN_NEXT_ICMP_ERROR;
- goto trace00;
- }
+ 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;
+ }
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
+ proto0 = ip_proto_to_nat_proto (ip0->protocol);
- if (is_slow_path)
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
+ {
+ 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))
{
- if (PREDICT_FALSE (proto0 == ~0))
- {
- s0 =
- nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0,
- thread_index, now, vm,
- node);
- other_packets++;
- if (!sm->forwarding_enabled)
- {
- if (!s0)
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace00;
- }
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- 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 trace00;
- }
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE];
+ next[0] = NAT_NEXT_DROP;
+ goto trace0;
}
- else
+ int err = nat_get_icmp_session_lookup_values (
+ b0, ip0, &lookup_saddr, &lookup_sport, &lookup_daddr,
+ &lookup_dport, &lookup_protocol);
+ if (err != 0)
{
- if (PREDICT_FALSE (proto0 == ~0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace00;
- }
-
- if (ip4_is_fragment (ip0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_REASS;
- fragments++;
- goto trace00;
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace00;
- }
+ 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;
+ }
- make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address,
- ip0->protocol, rx_fib_index0, udp0->dst_port,
- udp0->src_port);
-
- if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0))
+ /* 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))))
{
- if (is_slow_path)
- {
- /* 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 = udp0->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 == SNAT_PROTOCOL_UDP
- && (udp0->dst_port ==
- clib_host_to_net_u16
- (UDP_DST_PORT_dhcp_to_client))))
- {
- vnet_feature_next (&next0, b0);
- goto trace00;
- }
-
- if (!sm->forwarding_enabled)
- {
- b0->error =
- node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- }
- else
- {
- if (next_src_nat (sm, ip0, ip0->protocol,
- udp0->src_port, udp0->dst_port,
- thread_index, rx_fib_index0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_IN2OUT;
- goto trace00;
- }
- create_bypass_for_fwd (sm, ip0, rx_fib_index0,
- thread_index);
- }
- goto trace00;
- }
+ /* yes, this is the droid we're looking for */
+ lookup_skipped = 1;
+ goto skip_lookup;
+ }
+ s0 = NULL;
+ }
- if (PREDICT_FALSE (identity_nat0))
- goto trace00;
+ init_ed_k (&kv0, lookup_saddr, lookup_sport, lookup_daddr, lookup_dport,
+ rx_fib_index0, lookup_protocol);
- if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
- {
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace00;
- }
+ // 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:
- /* Create session initiated by host from external network */
- s0 = create_session_for_static_mapping_ed (sm, b0, l_key0,
- e_key0, node,
- thread_index,
- twice_nat0,
- lb_nat0, now);
+ 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 (!s0)
- {
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace00;
- }
- }
- else
- {
- next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace00;
- }
+ if (s0->tcp_closed_timestamp)
+ {
+ if (now >= s0->tcp_closed_timestamp)
+ {
+ // session is closed, go slow path, freed in slow path
+ next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
}
else
{
- s0 = pool_elt_at_index (tsm->sessions, value0.value);
+ // session in transitory timeout, drop
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_TCP_CLOSED];
+ 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;
+ // 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;
+ }
- 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 (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))))
+ {
+ goto trace0;
+ }
- if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ if (!sm->forwarding_enabled)
{
- old_port0 = tcp0->dst_port;
- new_port0 = tcp0->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, tcp0->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, s0, tcp0, thread_index))
- goto trace00;
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ next[0] = NAT_NEXT_DROP;
+ goto trace0;
}
else
{
- udp0->dst_port = s0->in2out.port;
- if (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))
{
- udp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
+ f = &s0->i2o;
+ }
+ else
+ {
+ // 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;
}
- udp0->checksum = 0;
- 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);
-
- trace00:
- 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->is_slow_path = is_slow_path;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (s0)
- t->session_index = s0 - tsm->sessions;
}
+ }
- pkts_processed += next0 == NAT44_ED_OUT2IN_NEXT_LOOKUP;
-
- next1 = NAT44_ED_OUT2IN_NEXT_LOOKUP;
- vnet_buffer (b1)->snat.flags = 0;
- ip1 = vlib_buffer_get_current (b1);
-
- sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
- rx_fib_index1 =
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index1);
+ 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;
+ }
- if (PREDICT_FALSE (ip1->ttl == 1))
- {
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next1 = NAT44_ED_OUT2IN_NEXT_ICMP_ERROR;
- goto trace01;
- }
+ 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;
+ }
- udp1 = ip4_next_header (ip1);
- tcp1 = (tcp_header_t *) udp1;
- icmp1 = (icmp46_header_t *) udp1;
- proto1 = ip_proto_to_snat_proto (ip1->protocol);
+ /* 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 (is_slow_path)
+ 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)
{
- if (PREDICT_FALSE (proto1 == ~0))
- {
- s1 =
- nat44_ed_out2in_unknown_proto (sm, b1, ip1, rx_fib_index1,
- thread_index, now, vm,
- node);
- other_packets++;
- if (!sm->forwarding_enabled)
- {
- if (!s1)
- next1 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace01;
- }
- }
-
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = icmp_out2in_ed_slow_path
- (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
- next1, now, thread_index, &s1);
- icmp_packets++;
- goto trace01;
- }
+ 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
{
- if (PREDICT_FALSE (proto1 == ~0))
- {
- next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace01;
- }
-
- if (ip4_is_fragment (ip1))
- {
- next1 = NAT44_ED_OUT2IN_NEXT_REASS;
- fragments++;
- goto trace01;
- }
-
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace01;
- }
+ t->session_index = ~0;
}
+ }
- make_ed_kv (&kv1, &ip1->dst_address, &ip1->src_address,
- ip1->protocol, rx_fib_index1, udp1->dst_port,
- udp1->src_port);
+ if (next[0] == NAT_NEXT_DROP)
+ {
+ vlib_increment_simple_counter (&sm->counters.fastpath.
+ out2in_ed.drops, thread_index,
+ sw_if_index0, 1);
+ }
- if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv1, &value1))
- {
- if (is_slow_path)
- {
- /* Try to match static mapping by external address and port,
- destination address and port in packet */
- e_key1.addr = ip1->dst_address;
- e_key1.port = udp1->dst_port;
- e_key1.protocol = proto1;
- e_key1.fib_index = rx_fib_index1;
- if (snat_static_mapping_match (sm, e_key1, &l_key1, 1, 0,
- &twice_nat1, &lb_nat1,
- &ip1->src_address,
- &identity_nat1))
- {
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_UDP
- && (udp1->dst_port ==
- clib_host_to_net_u16
- (UDP_DST_PORT_dhcp_to_client))))
- {
- vnet_feature_next (&next1, b1);
- goto trace01;
- }
-
- if (!sm->forwarding_enabled)
- {
- b1->error =
- node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next1 = NAT44_ED_OUT2IN_NEXT_DROP;
- }
- else
- {
- if (next_src_nat (sm, ip1, ip1->protocol,
- udp1->src_port, udp1->dst_port,
- thread_index, rx_fib_index1))
- {
- next1 = NAT44_ED_OUT2IN_NEXT_IN2OUT;
- goto trace01;
- }
- create_bypass_for_fwd (sm, ip1, rx_fib_index1,
- thread_index);
- }
- goto trace01;
- }
+ n_left_from--;
+ next++;
+ }
- if (PREDICT_FALSE (identity_nat1))
- goto trace01;
+ vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
+ frame->n_vectors);
+ return frame->n_vectors;
+}
- if ((proto1 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp1))
- {
- b1->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
- next1 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace01;
- }
+static inline uword
+nat44_ed_out2in_slow_path_node_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ 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];
+ snat_static_mapping_t *m;
- /* Create session initiated by host from external network */
- s1 = create_session_for_static_mapping_ed (sm, b1, l_key1,
- e_key1, node,
- thread_index,
- twice_nat1,
- lb_nat1, now);
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
- if (!s1)
- {
- next1 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace01;
- }
- }
- else
- {
- next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace01;
- }
- }
- else
- {
- s1 = pool_elt_at_index (tsm->sessions, value1.value);
- }
+ 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);
- old_addr1 = ip1->dst_address.as_u32;
- new_addr1 = ip1->dst_address.as_u32 = s1->in2out.addr.as_u32;
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = s1->in2out.fib_index;
+ while (n_left_from > 0)
+ {
+ 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;
+ }
- sum1 = ip1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t,
- dst_address);
- if (PREDICT_FALSE (is_twice_nat_session (s1)))
- sum1 = ip_csum_update (sum1, ip1->src_address.as_u32,
- s1->ext_host_nat_addr.as_u32, ip4_header_t,
- src_address);
- ip1->checksum = ip_csum_fold (sum1);
+ udp0 = ip4_next_header (ip0);
+ icmp0 = (icmp46_header_t *) udp0;
+ proto0 = ip_proto_to_nat_proto (ip0->protocol);
- if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP))
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
+ {
+ s0 = nat44_ed_out2in_slowpath_unknown_proto (
+ sm, b0, ip0, rx_fib_index0, thread_index, now, vm, node);
+ if (!sm->forwarding_enabled)
{
- old_port1 = tcp1->dst_port;
- new_port1 = tcp1->dst_port = s1->in2out.port;
-
- sum1 = tcp1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t,
- dst_address);
- sum1 = ip_csum_update (sum1, old_port1, new_port1, ip4_header_t,
- length);
- if (is_twice_nat_session (s1))
- {
- sum1 = ip_csum_update (sum1, ip1->src_address.as_u32,
- s1->ext_host_nat_addr.as_u32,
- ip4_header_t, dst_address);
- sum1 = ip_csum_update (sum1, tcp1->src_port,
- s1->ext_host_nat_port, ip4_header_t,
- length);
- tcp1->src_port = s1->ext_host_nat_port;
- ip1->src_address.as_u32 = s1->ext_host_nat_addr.as_u32;
- }
- tcp1->checksum = ip_csum_fold (sum1);
- tcp_packets++;
- if (nat44_set_tcp_session_state_o2i
- (sm, s1, tcp1, thread_index))
- goto trace01;
+ if (!s0)
+ next[0] = NAT_NEXT_DROP;
}
- else
+ 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 */)))
{
- udp1->dst_port = s1->in2out.port;
- if (is_twice_nat_session (s1))
- {
- udp1->src_port = s1->ext_host_nat_port;
- ip1->src_address.as_u32 = s1->ext_host_nat_addr.as_u32;
- }
- udp1->checksum = 0;
- udp_packets++;
- }
-
- /* Accounting */
- nat44_session_update_counters (s1, now,
- vlib_buffer_length_in_chain (vm, b1),
- thread_index);
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s1, thread_index);
-
- trace01:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b1->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat44_ed_out2in_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- t->is_slow_path = is_slow_path;
- t->sw_if_index = sw_if_index1;
- t->next_index = next1;
- t->session_index = ~0;
- if (s1)
- t->session_index = s1 - tsm->sessions;
+ goto trace0;
}
- pkts_processed += next1 == NAT44_ED_OUT2IN_NEXT_LOOKUP;
-
- /* 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);
+ vlib_increment_simple_counter (&sm->counters.slowpath.
+ out2in_ed.other, thread_index,
+ sw_if_index0, 1);
+ goto trace0;
}
- 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;
- 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 = NAT44_ED_OUT2IN_NEXT_LOOKUP;
- 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))
+ 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 */)))
{
- 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 = NAT44_ED_OUT2IN_NEXT_ICMP_ERROR;
goto trace0;
}
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
+ vlib_increment_simple_counter (&sm->counters.slowpath.
+ out2in_ed.icmp, thread_index,
+ sw_if_index0, 1);
+ goto trace0;
+ }
- if (is_slow_path)
- {
- if (PREDICT_FALSE (proto0 == ~0))
- {
- s0 =
- nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0,
- thread_index, now, vm,
- node);
- other_packets++;
- if (!sm->forwarding_enabled)
- {
- if (!s0)
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace0;
- }
- }
+ 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 (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- 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;
- }
- }
- else
+ 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)
{
- if (PREDICT_FALSE (proto0 == ~0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace0;
- }
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat_ed_session_delete (sm, s0, thread_index, 1);
+ s0 = NULL;
+ }
+ }
- if (ip4_is_fragment (ip0))
+ 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))
+ {
+ /*
+ * 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))))
{
- next0 = NAT44_ED_OUT2IN_NEXT_REASS;
- fragments++;
goto trace0;
}
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ if (!sm->forwarding_enabled)
{
- next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace0;
+ b0->error =
+ node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ next[0] = NAT_NEXT_DROP;
}
- }
-
- make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address,
- ip0->protocol, rx_fib_index0, udp0->dst_port,
- udp0->src_port);
-
- if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0))
- {
- if (is_slow_path)
+ else
{
- /* 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 = udp0->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))
+ 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))
{
- /*
- * 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
- && (udp0->dst_port ==
- clib_host_to_net_u16
- (UDP_DST_PORT_dhcp_to_client))))
- {
- vnet_feature_next (&next0, b0);
- goto trace0;
- }
-
- if (!sm->forwarding_enabled)
- {
- b0->error =
- node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- }
- else
- {
- if (next_src_nat (sm, ip0, ip0->protocol,
- udp0->src_port, udp0->dst_port,
- thread_index, rx_fib_index0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_IN2OUT;
- goto trace0;
- }
- create_bypass_for_fwd (sm, ip0, rx_fib_index0,
- thread_index);
- }
- goto trace0;
+ next[0] = NAT_NEXT_IN2OUT_ED_FAST_PATH;
}
-
- if (PREDICT_FALSE (identity_nat0))
- goto trace0;
-
- if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
+ else
{
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace0;
+ create_bypass_for_fwd (sm, b0, s0, ip0, rx_fib_index0,
+ thread_index);
}
+ }
+ goto trace0;
+ }
- /* Create session initiated by host from external network */
- s0 = create_session_for_static_mapping_ed (sm, b0, l_key0,
- e_key0, node,
- thread_index,
- twice_nat0,
- lb_nat0, now);
+ if (PREDICT_FALSE (identity_nat0))
+ goto trace0;
- if (!s0)
- {
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace0;
- }
- }
- else
- {
- next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- 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;
}
- else
+
+ /* 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)
{
- s0 = pool_elt_at_index (tsm->sessions, value0.value);
+ next[0] = NAT_NEXT_DROP;
+ goto trace0;
}
+ }
+
+ 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;
+ }
- 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 (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);
+ }
- 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);
+ /* 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))
+ 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)
{
- old_port0 = tcp0->dst_port;
- new_port0 = tcp0->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, tcp0->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, s0, tcp0, thread_index))
- goto trace0;
+ 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
{
- udp0->dst_port = s0->in2out.port;
- if (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;
- }
- udp0->checksum = 0;
- 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->is_slow_path = is_slow_path;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
t->session_index = ~0;
- if (s0)
- t->session_index = s0 - tsm->sessions;
}
+ }
- pkts_processed += next0 == NAT44_ED_OUT2IN_NEXT_LOOKUP;
- /* 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_node_fn_inline (vm, node, frame, 0);
+ 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* */
VLIB_REGISTER_NODE (nat44_ed_out2in_node) = {
.name = "nat44-ed-out2in",
.vector_size = sizeof (u32),
+ .sibling_of = "nat-default",
.format_trace = format_nat44_ed_out2in_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN(nat_out2in_ed_error_strings),
.error_strings = nat_out2in_ed_error_strings,
.runtime_data_bytes = sizeof (snat_runtime_t),
- .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT,
- .next_nodes = {
- [NAT44_ED_OUT2IN_NEXT_DROP] = "error-drop",
- [NAT44_ED_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
- [NAT44_ED_OUT2IN_NEXT_SLOW_PATH] = "nat44-ed-out2in-slowpath",
- [NAT44_ED_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT44_ED_OUT2IN_NEXT_IN2OUT] = "nat44-ed-in2out",
- [NAT44_ED_OUT2IN_NEXT_REASS] = "nat44-ed-out2in-reass",
- },
};
/* *INDENT-ON* */
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- return nat44_ed_out2in_node_fn_inline (vm, node, frame, 1);
+ return nat44_ed_out2in_slow_path_node_fn_inline (vm, node, frame);
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (nat44_ed_out2in_slowpath_node) = {
.name = "nat44-ed-out2in-slowpath",
.vector_size = sizeof (u32),
+ .sibling_of = "nat-default",
.format_trace = format_nat44_ed_out2in_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN(nat_out2in_ed_error_strings),
.error_strings = nat_out2in_ed_error_strings,
.runtime_data_bytes = sizeof (snat_runtime_t),
- .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT,
- .next_nodes = {
- [NAT44_ED_OUT2IN_NEXT_DROP] = "error-drop",
- [NAT44_ED_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
- [NAT44_ED_OUT2IN_NEXT_SLOW_PATH] = "nat44-ed-out2in-slowpath",
- [NAT44_ED_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT44_ED_OUT2IN_NEXT_IN2OUT] = "nat44-ed-in2out",
- [NAT44_ED_OUT2IN_NEXT_REASS] = "nat44-ed-out2in-reass",
- },
};
/* *INDENT-ON* */
-VLIB_NODE_FN (nat44_ed_out2in_reass_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+static u8 *
+format_nat_pre_trace (u8 * s, va_list * args)
{
- u32 n_left_from, *from, *to_next;
- nat44_ed_out2in_next_t next_index;
- u32 pkts_processed = 0;
- snat_main_t *sm = &snat_main;
- f64 now = vlib_time_now (vm);
- u32 thread_index = vm->thread_index;
- snat_main_per_thread_data_t *per_thread_data =
- &sm->per_thread_data[thread_index];
- u32 *fragments_to_drop = 0;
- u32 *fragments_to_loopback = 0;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0;
- vlib_buffer_t *b0;
- u32 next0;
- u8 cached0 = 0;
- ip4_header_t *ip0;
- nat_reass_ip4_t *reass0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- icmp46_header_t *icmp0;
- clib_bihash_kv_16_8_t kv0, value0;
- snat_session_t *s0 = 0;
- u16 old_port0, new_port0;
- ip_csum_t sum0;
- snat_session_key_t e_key0, l_key0;
- lb_nat_type_t lb0;
- 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 = NAT44_ED_OUT2IN_NEXT_LOOKUP;
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 =
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index0);
-
- if (PREDICT_FALSE (nat_reass_is_drop_frag (0)))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_DROP_FRAGMENT];
- goto trace0;
- }
-
- ip0 = (ip4_header_t *) vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
- ip0->dst_address,
- ip0->fragment_id,
- ip0->protocol,
- 1, &fragments_to_drop);
-
- if (PREDICT_FALSE (!reass0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_REASS];
- nat_log_notice ("maximum reassemblies exceeded");
- goto trace0;
- }
-
- if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
- {
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_out2in_ed_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
-
- if (PREDICT_TRUE (next0 != NAT44_ED_OUT2IN_NEXT_DROP))
- {
- if (s0)
- reass0->sess_index = s0 - per_thread_data->sessions;
- else
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- reass0->thread_index = thread_index;
- nat_ip4_reass_get_frags (reass0,
- &fragments_to_loopback);
- }
-
- goto trace0;
- }
-
- make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address,
- ip0->protocol, rx_fib_index0, udp0->dst_port,
- udp0->src_port);
-
- if (clib_bihash_search_16_8
- (&per_thread_data->out2in_ed, &kv0, &value0))
- {
- /* 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 = udp0->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, &lb0, 0,
- &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 == SNAT_PROTOCOL_UDP
- && (udp0->dst_port
- ==
- clib_host_to_net_u16
- (UDP_DST_PORT_dhcp_to_client))))
- {
- vnet_feature_next (&next0, b0);
- goto trace0;
- }
-
- if (!sm->forwarding_enabled)
- {
- b0->error =
- node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- }
- else
- {
- if (next_src_nat (sm, ip0, ip0->protocol,
- udp0->src_port, udp0->dst_port,
- thread_index, rx_fib_index0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_IN2OUT;
- goto trace0;
- }
- create_bypass_for_fwd (sm, ip0, rx_fib_index0,
- thread_index);
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- nat_ip4_reass_get_frags (reass0,
- &fragments_to_loopback);
- }
- goto trace0;
- }
-
- if (PREDICT_FALSE (identity_nat0))
- {
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- goto trace0;
- }
-
- if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
- {
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
- next0 = NAT44_ED_OUT2IN_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,
- thread_index,
- twice_nat0, lb0,
- now);
- if (!s0)
- {
- b0->error =
- node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace0;
- }
- reass0->sess_index = s0 - per_thread_data->sessions;
- reass0->thread_index = thread_index;
- }
- else
- {
- s0 = pool_elt_at_index (per_thread_data->sessions,
- value0.value);
- reass0->sess_index = value0.value;
- }
- nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
- }
- else
- {
- if (reass0->flags & NAT_REASS_FLAG_ED_DONT_TRANSLATE)
- goto trace0;
- if (PREDICT_FALSE (reass0->sess_index == (u32) ~ 0))
- {
- if (nat_ip4_reass_add_fragment
- (thread_index, reass0, bi0, &fragments_to_drop))
- {
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_FRAG];
- nat_log_notice
- ("maximum fragments per reassembly exceeded");
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace0;
- }
- cached0 = 1;
- goto trace0;
- }
- s0 = pool_elt_at_index (per_thread_data->sessions,
- reass0->sess_index);
- }
-
- old_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address = s0->in2out.addr;
- new_addr0 = ip0->dst_address.as_u32;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */ );
- 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_FALSE (ip4_is_first_fragment (ip0)))
- {
- if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->dst_port;
- tcp0->dst_port = s0->in2out.port;
- new_port0 = tcp0->dst_port;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */ );
-
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
- if (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, tcp0->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);
- }
- else
- {
- old_port0 = udp0->dst_port;
- udp0->dst_port = s0->in2out.port;
- if (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;
- }
- udp0->checksum = 0;
- }
- }
-
- /* 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_reass_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->cached = cached0;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- }
-
- if (cached0)
- {
- n_left_to_next++;
- to_next--;
- }
- else
- {
- pkts_processed += next0 != NAT44_ED_OUT2IN_NEXT_DROP;
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- if (n_left_from == 0 && vec_len (fragments_to_loopback))
- {
- from = vlib_frame_vector_args (frame);
- u32 len = vec_len (fragments_to_loopback);
- if (len <= VLIB_FRAME_SIZE)
- {
- clib_memcpy_fast (from, fragments_to_loopback,
- sizeof (u32) * len);
- n_left_from = len;
- vec_reset_length (fragments_to_loopback);
- }
- else
- {
- clib_memcpy_fast (from, fragments_to_loopback +
- (len - VLIB_FRAME_SIZE),
- sizeof (u32) * VLIB_FRAME_SIZE);
- n_left_from = VLIB_FRAME_SIZE;
- _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
- }
- }
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_node_increment_counter (vm, sm->ed_out2in_reass_node_index,
- NAT_OUT2IN_ED_ERROR_OUT2IN_PACKETS,
- pkts_processed);
-
- nat_send_all_to_node (vm, fragments_to_drop, node,
- &node->errors[NAT_OUT2IN_ED_ERROR_DROP_FRAGMENT],
- NAT44_ED_OUT2IN_NEXT_DROP);
+ 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 arc_next_index %d", t->next_index,
+ t->arc_next_index);
+}
- vec_free (fragments_to_drop);
- vec_free (fragments_to_loopback);
- return frame->n_vectors;
+VLIB_NODE_FN (nat_pre_out2in_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat_pre_node_fn_inline (vm, node, frame,
+ NAT_NEXT_OUT2IN_ED_FAST_PATH);
}
/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (nat44_ed_out2in_reass_node) = {
- .name = "nat44-ed-out2in-reass",
+VLIB_REGISTER_NODE (nat_pre_out2in_node) = {
+ .name = "nat-pre-out2in",
.vector_size = sizeof (u32),
- .format_trace = format_nat44_reass_trace,
+ .sibling_of = "nat-default",
+ .format_trace = format_nat_pre_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN(nat_out2in_ed_error_strings),
- .error_strings = nat_out2in_ed_error_strings,
- .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT,
- .next_nodes = {
- [NAT44_ED_OUT2IN_NEXT_DROP] = "error-drop",
- [NAT44_ED_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
- [NAT44_ED_OUT2IN_NEXT_SLOW_PATH] = "nat44-ed-out2in-slowpath",
- [NAT44_ED_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT44_ED_OUT2IN_NEXT_IN2OUT] = "nat44-ed-in2out",
- [NAT44_ED_OUT2IN_NEXT_REASS] = "nat44-ed-out2in-reass",
- },
-};
+ .n_errors = 0,
+ };
/* *INDENT-ON* */
/*
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