#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[] = {
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)
{
vlib_main_t *vm = vlib_get_main ();
- 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))
+ 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
- (vm, 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_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 = nat_proto_to_ip_proto (s->nat_proto);
- 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;
- }
- init_ed_k (&ed_kv, *l_addr, l_port, *r_addr, r_port, fib_index, proto);
- 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->nat_proto,
- 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->nat_proto, is_twice_nat_session (s));
-
- nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr,
- s->ext_host_port, s->nat_proto, 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))
{
- // FIXME TODO this is obviously wrong code ... needs fix!
- // key.protocol = s->nat_proto;
- // 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 (snat_is_session_static (s))
- goto delete;
+ 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;
+ }
- snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
- &s->out2in.addr, s->out2in.port,
- s->nat_proto);
- delete:
- nat_ed_session_delete (sm, s, ctx->thread_index, 1);
- return 1;
+ if (PREDICT_FALSE (identity_nat))
+ {
+ goto out;
}
- return 0;
+ /* 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;
}
-#endif
// allocate exact address based on preference
static_always_inline int
}
/* Totally out of translations to use... */
- snat_ipfix_logging_addresses_exhausted (thread_index, 0);
+ 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;
+}
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)
+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;
- nat44_is_idle_session_ctx_t ctx;
if (PREDICT_FALSE
(nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index)))
s->in2out.fib_index = i2o_fib_index;
s->nat_proto = nat_proto;
- /* Add to lookup tables */
- init_ed_kv (&kv, o2i_addr, o2i_port, s->ext_host_addr, s->ext_host_port,
- o2i_fib_index, ip->protocol, thread_index, s - tsm->sessions);
- ctx.now = now;
- ctx.thread_index = thread_index;
- if (clib_bihash_add_or_overwrite_stale_16_8 (&sm->out2in_ed, &kv,
- nat44_o2i_ed_is_idle_session_cb,
- &ctx))
- nat_elog_notice ("out2in-ed key add failed");
+ 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 == i2o_addr.as_u32))
}
else
{
- rc =
- snat_alloc_outside_address_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);
+ 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];
+ 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);
- if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &kv, 0))
- nat_elog_notice ("out2in-ed key del failed");
return 0;
}
s->flags |= SNAT_SESSION_FLAG_TWICE_NAT;
- init_ed_kv (&kv, i2o_addr, i2o_port, s->ext_host_nat_addr,
- s->ext_host_nat_port, i2o_fib_index, ip->protocol,
- thread_index, s - tsm->sessions);
+
+ 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
{
- init_ed_kv (&kv, i2o_addr, i2o_port, s->ext_host_addr,
- s->ext_host_port, i2o_fib_index, ip->protocol,
- thread_index, s - tsm->sessions);
+ 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);
+ }
}
- 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->nat_proto,
- s->in2out.port,
- s->out2in.port, s->in2out.fib_index);
+
+ 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
+ {
+ 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))
+ {
+ 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_addr, s->ext_host_port,
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->nat_proto, 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];
-
- 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 (&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];
vlib_main_t *vm = vlib_get_main ();
f64 now = vlib_time_now (vm);
- u16 l_port, r_port;
+ 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, ~0, ~0, 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;
}
- init_ed_k (&kv, ip->dst_address, l_port, ip->src_address, r_port,
- rx_fib_index, ip->protocol);
+ 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))
+ {
+ return;
+ }
else
{
u32 proto;
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.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->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;
- 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");
+ 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;
+ }
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, ip4_address_t * addr,
- u16 * port, u32 * fib_index, nat_protocol_t * proto,
- void *d, void *e, u8 * dont_translate)
+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 is_addr_only, identity_nat;
- u16 l_port, r_port;
- vlib_main_t *vm = vlib_get_main ();
- ip4_address_t sm_addr;
- u16 sm_port;
- u32 sm_fib_index;
- *dont_translate = 0;
+ clib_bihash_kv_8_8_t kv, value;
snat_static_mapping_t *m;
+ snat_session_t *s;
- 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 (get_icmp_o2i_ed_key
- (b, ip, rx_fib_index, ~0, ~0, 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 (&sm->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))
{
- if (snat_static_mapping_match
- (sm, ip->dst_address, l_port, 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))
- {
- // static mapping not matched
- 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;
- }
- else
- {
- b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next = NAT_NEXT_DROP;
- }
- }
- 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;
- }
- else
- {
- 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;
- }
-
- /* 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,
- l_port, rx_fib_index, *proto,
- node, rx_fib_index,
- thread_index, 0, 0,
- vlib_time_now (vm), m);
- if (!s)
- next = NAT_NEXT_DROP;
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ return 0;
}
- else
- {
- 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;
- }
- ASSERT (thread_index == ed_value_get_thread_index (&value));
- s =
- pool_elt_at_index (tsm->sessions,
- ed_value_get_session_index (&value));
- }
-out:
- if (s)
+ m = pool_elt_at_index (sm->static_mappings, value.value);
+
+ /* Create a new session */
+ s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol);
+ if (!s)
{
- *addr = s->in2out.addr;
- *port = s->in2out.port;
- *fib_index = s->in2out.fib_index;
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_USER_SESS_EXCEEDED];
+ nat_elog_warn ("create NAT session failed");
+ return 0;
}
- 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;
-
- init_ed_k (&s_kv, ip->dst_address, 0, ip->src_address, 0, rx_fib_index,
- ip->protocol);
-
- if (!clib_bihash_search_16_8 (&sm->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))
{
- ASSERT (thread_index == ed_value_get_thread_index (&s_value));
- s =
- pool_elt_at_index (tsm->sessions,
- ed_value_get_session_index (&s_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;
- }
- init_nat_k (&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, 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;
- }
-
- 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 (&sm->out2in_ed, &s_kv, 1))
- nat_elog_notice ("out2in key add failed");
-
- init_ed_kv (&s_kv, ip->dst_address, 0, ip->src_address, 0, m->fib_index,
- ip->protocol, thread_index, s - tsm->sessions);
- if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1))
- nat_elog_notice ("in2out key add failed");
-
- per_vrf_sessions_register_session (s, thread_index);
+ 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),
while (n_left_from > 0)
{
vlib_buffer_t *b0;
- u32 sw_if_index0, rx_fib_index0, proto0, old_addr0, new_addr0;
- u16 old_port0, new_port0;
+ u32 sw_if_index0, rx_fib_index0;
+ nat_protocol_t proto0;
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;
+ 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))
{
goto trace0;
}
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
proto0 = ip_proto_to_nat_proto (ip0->protocol);
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
{
- next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
- goto trace0;
+ 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))
+ {
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE];
+ next[0] = NAT_NEXT_DROP;
+ goto trace0;
+ }
+ int err = nat_get_icmp_session_lookup_values (
+ b0, ip0, &lookup_saddr, &lookup_sport, &lookup_daddr,
+ &lookup_dport, &lookup_protocol);
+ if (err != 0)
+ {
+ b0->error = node->errors[err];
+ next[0] = NAT_NEXT_DROP;
+ goto trace0;
+ }
}
-
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
+ else
{
- next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
- goto trace0;
+ lookup_saddr.as_u32 = ip0->src_address.as_u32;
+ lookup_daddr.as_u32 = ip0->dst_address.as_u32;
+ lookup_protocol = ip0->protocol;
}
- init_ed_k (&kv0, ip0->dst_address,
- vnet_buffer (b0)->ip.reass.l4_dst_port, ip0->src_address,
- vnet_buffer (b0)->ip.reass.l4_src_port, rx_fib_index0,
- ip0->protocol);
-
- /* there is a stashed index in vnet_buffer2 from handoff node,
- * see if we can use it */
- if (is_multi_worker
- &&
- PREDICT_TRUE (!pool_is_free_index
- (tsm->sessions,
- vnet_buffer2 (b0)->nat.ed_out2in_nat_session_index)))
+ /* 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.ed_out2in_nat_session_index);
- if (PREDICT_TRUE
- (s0->out2in.addr.as_u32 == ip0->dst_address.as_u32
- && s0->out2in.port == vnet_buffer (b0)->ip.reass.l4_dst_port
- && s0->nat_proto == ip_proto_to_nat_proto (ip0->protocol)
- && s0->out2in.fib_index == rx_fib_index0
- && s0->ext_host_addr.as_u32 == ip0->src_address.as_u32
- && s0->ext_host_port ==
- vnet_buffer (b0)->ip.reass.l4_src_port))
+ 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))))
{
/* yes, this is the droid we're looking for */
+ lookup_skipped = 1;
goto skip_lookup;
}
+ s0 = NULL;
}
- // lookup for session
- if (clib_bihash_search_16_8 (&sm->out2in_ed, &kv0, &value0))
+ 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))
{
- // session does not exist go slow path
+ // flow does not exist go slow path
next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
goto trace0;
}
s0 =
pool_elt_at_index (tsm->sessions,
ed_value_get_session_index (&value0));
-
skip_lookup:
if (PREDICT_FALSE (per_vrf_sessions_is_expired (s0, thread_index)))
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 == NAT_PROTOCOL_TCP))
+ if (nat_6t_flow_match (&s0->o2i, b0, lookup_saddr, lookup_sport,
+ lookup_daddr, lookup_dport, lookup_protocol,
+ rx_fib_index0))
{
- 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);
- }
- vlib_increment_simple_counter (&sm->counters.fastpath.out2in_ed.tcp,
- thread_index, sw_if_index0, 1);
- 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;
+ f = &s0->o2i;
}
- else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
- && udp0->checksum)
+ 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))
{
- 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);
- vlib_increment_simple_counter (&sm->counters.fastpath.out2in_ed.udp,
- thread_index, sw_if_index0, 1);
+ f = &s0->i2o;
}
else
{
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
+ /*
+ * 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))))
{
- new_port0 = udp0->dst_port = s0->in2out.port;
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ goto trace0;
+ }
+
+ if (!sm->forwarding_enabled)
+ {
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ next[0] = NAT_NEXT_DROP;
+ goto trace0;
+ }
+ else
+ {
+ 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;
}
}
+ }
+
+ 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;
+ }
+
+ 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 */
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)
- t->session_index = s0 - tsm->sessions;
+ {
+ 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;
+ {
+ t->session_index = ~0;
+ }
}
if (next[0] == NAT_NEXT_DROP)
while (n_left_from > 0)
{
vlib_buffer_t *b0;
- u32 sw_if_index0, rx_fib_index0, proto0, old_addr0, new_addr0;
- u16 old_port0, new_port0;
+ u32 sw_if_index0, rx_fib_index0;
+ nat_protocol_t proto0;
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;
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;
}
udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
icmp0 = (icmp46_header_t *) udp0;
proto0 = ip_proto_to_nat_proto (ip0->protocol);
if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
{
- s0 =
- nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0,
- thread_index, now, vm, node);
+ s0 = nat44_ed_out2in_slowpath_unknown_proto (
+ sm, b0, ip0, rx_fib_index0, thread_index, now, vm, node);
if (!sm->forwarding_enabled)
{
if (!s0)
next[0] = NAT_NEXT_DROP;
}
+ 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 */)))
+ {
+ goto trace0;
+ }
+
vlib_increment_simple_counter (&sm->counters.slowpath.
out2in_ed.other, thread_index,
sw_if_index0, 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 */)))
+ {
+ goto trace0;
+ }
+
vlib_increment_simple_counter (&sm->counters.slowpath.
out2in_ed.icmp, thread_index,
sw_if_index0, 1);
goto trace0;
}
- init_ed_k (&kv0, ip0->dst_address,
- vnet_buffer (b0)->ip.reass.l4_dst_port, ip0->src_address,
- vnet_buffer (b0)->ip.reass.l4_src_port, rx_fib_index0,
+ 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);
s0 = NULL;
- if (!clib_bihash_search_16_8 (&sm->out2in_ed, &kv0, &value0))
+ if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0))
{
ASSERT (thread_index == ed_value_get_thread_index (&value0));
s0 =
}
else
{
- 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;
}
}
- 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 (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;
+ }
if (PREDICT_TRUE (proto0 == NAT_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);
- }
vlib_increment_simple_counter (&sm->counters.slowpath.out2in_ed.tcp,
thread_index, sw_if_index0, 1);
- 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)
- {
- 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);
- vlib_increment_simple_counter (&sm->counters.slowpath.out2in_ed.udp,
- 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
{
- 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;
- }
- }
vlib_increment_simple_counter (&sm->counters.slowpath.out2in_ed.udp,
thread_index, sw_if_index0, 1);
}
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)
- t->session_index = s0 - tsm->sessions;
+ {
+ 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
- t->session_index = ~0;
+ {
+ t->session_index = ~0;
+ }
}
if (next[0] == NAT_NEXT_DROP)
Code Review / vpp.git / blobdiff