#include <nat/nat_ipfix_logging.h>
#include <nat/nat_det.h>
#include <nat/nat_reass.h>
+#include <nat/nat_inlines.h>
#include <vppinfra/hash.h>
#include <vppinfra/error.h>
vlib_node_registration_t snat_out2in_worker_handoff_node;
vlib_node_registration_t snat_det_out2in_node;
vlib_node_registration_t nat44_out2in_reass_node;
+vlib_node_registration_t nat44_ed_out2in_node;
+vlib_node_registration_t nat44_ed_out2in_slowpath_node;
#define foreach_snat_out2in_error \
_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \
_(MAX_SESSIONS_EXCEEDED, "Maximum sessions exceeded") \
_(DROP_FRAGMENT, "Drop fragment") \
_(MAX_REASS, "Maximum reassemblies exceeded") \
-_(MAX_FRAG, "Maximum fragments per reassembly exceeded")
+_(MAX_FRAG, "Maximum fragments per reassembly exceeded")\
+_(FQ_CONGESTED, "Handoff frame queue congested")
typedef enum {
#define _(sym,str) SNAT_OUT2IN_ERROR_##sym,
SNAT_OUT2IN_N_NEXT,
} snat_out2in_next_t;
+int
+nat44_o2i_is_idle_session_cb (clib_bihash_kv_8_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;
+ snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
+ ctx->thread_index);
+ clib_bihash_kv_8_8_t s_kv;
+
+ 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)
+ {
+ s_kv.key = s->in2out.as_u64;
+ if (clib_bihash_add_del_8_8 (&tsm->in2out, &s_kv, 0))
+ nat_log_warn ("out2in key del failed");
+
+ snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->in2out.protocol,
+ s->in2out.port,
+ s->out2in.port,
+ s->in2out.fib_index);
+
+ if (!snat_is_session_static (s))
+ snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
+ &s->out2in);
+
+ nat44_delete_session (sm, s, ctx->thread_index);
+ return 1;
+ }
+
+ return 0;
+}
+
/**
* @brief Create session for static mapping.
*
snat_session_key_t in2out,
snat_session_key_t out2in,
vlib_node_runtime_t * node,
- u32 thread_index)
+ u32 thread_index,
+ f64 now)
{
snat_user_t *u;
snat_session_t *s;
clib_bihash_kv_8_8_t kv0;
ip4_header_t *ip0;
udp_header_t *udp0;
+ nat44_is_idle_session_ctx_t ctx0;
if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index)))
{
b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_SESSIONS_EXCEEDED];
+ nat_log_notice ("maximum sessions exceeded");
return 0;
}
u = nat_user_get_or_create (sm, &in2out.addr, in2out.fib_index, thread_index);
if (!u)
{
- clib_warning ("create NAT user failed");
+ nat_log_warn ("create NAT user failed");
return 0;
}
s = nat_session_alloc_or_recycle (sm, u, thread_index);
if (!s)
{
- clib_warning ("create NAT session failed");
+ nat44_delete_user_with_no_session (sm, u, thread_index);
+ nat_log_warn ("create NAT session failed");
return 0;
}
s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
s->ext_host_addr.as_u32 = ip0->src_address.as_u32;
s->ext_host_port = udp0->src_port;
- u->nstaticsessions++;
+ user_session_increment (sm, u, 1 /* static */);
s->in2out = in2out;
s->out2in = out2in;
s->in2out.protocol = out2in.protocol;
/* Add to translation hashes */
+ ctx0.now = now;
+ ctx0.thread_index = thread_index;
kv0.key = s->in2out.as_u64;
kv0.value = s - sm->per_thread_data[thread_index].sessions;
- if (clib_bihash_add_del_8_8 (&sm->per_thread_data[thread_index].in2out, &kv0,
- 1 /* is_add */))
- clib_warning ("in2out key add failed");
+ if (clib_bihash_add_or_overwrite_stale_8_8 (
+ &sm->per_thread_data[thread_index].in2out, &kv0,
+ nat44_i2o_is_idle_session_cb, &ctx0))
+ nat_log_notice ("in2out key add failed");
kv0.key = s->out2in.as_u64;
- if (clib_bihash_add_del_8_8 (&sm->per_thread_data[thread_index].out2in, &kv0,
- 1 /* is_add */))
- clib_warning ("out2in key add failed");
+ if (clib_bihash_add_or_overwrite_stale_8_8 (
+ &sm->per_thread_data[thread_index].out2in, &kv0,
+ nat44_o2i_is_idle_session_cb, &ctx0))
+ nat_log_notice ("out2in key add failed");
/* log NAT event */
snat_ipfix_logging_nat44_ses_create(s->in2out.addr.as_u32,
s->in2out.port,
s->out2in.port,
s->in2out.fib_index);
- return s;
+ return s;
}
static_always_inline
return -1; /* success */
}
-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))
- {
- key0.proto = IP_PROTOCOL_ICMP;
- key0.l_addr = ip0->dst_address;
- key0.r_addr = ip0->src_address;
- key0.l_port = key0.r_port = echo0->identifier;
- }
- 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))
- {
- case SNAT_PROTOCOL_ICMP:
- inner_icmp0 = (icmp46_header_t*)l4_header;
- inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1);
- key0.l_port = key0.r_port = inner_echo0->identifier;
- 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;
- }
- }
- *p_key0 = key0;
- return 0;
-}
-
/**
* Get address and port values to be used for ICMP packet translation
* and create session if needed
{
/* Try to match static mapping by external address and port,
destination address and port in packet */
- if (snat_static_mapping_match(sm, key0, &sm0, 1, &is_addr_only, 0))
+ if (snat_static_mapping_match(sm, key0, &sm0, 1, &is_addr_only, 0, 0))
{
if (!sm->forwarding_enabled)
{
/* Create session initiated by host from external network */
s0 = create_session_for_static_mapping(sm, b0, sm0, key0,
- node, thread_index);
+ node, thread_index,
+ vlib_time_now (sm->vlib_main));
if (!s0)
{
goto out;
}
- if (PREDICT_FALSE (value0.value == ~0ULL))
- {
- nat_ed_ses_key_t key;
- clib_bihash_kv_16_8_t s_kv, s_value;
-
- key.as_u64[0] = 0;
- key.as_u64[1] = 0;
- if (icmp_get_ed_key (ip0, &key))
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto out;
- }
- key.fib_index = rx_fib_index0;
- s_kv.key[0] = key.as_u64[0];
- s_kv.key[1] = key.as_u64[1];
- if (!clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value))
- s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- s_value.value);
- else
- {
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto out;
- }
- }
- else
- s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value0.value);
+ s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ value0.value);
}
out:
}
key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, key0, &sm0, 1, &is_addr_only, 0))
+ if (snat_static_mapping_match(sm, key0, &sm0, 1, &is_addr_only, 0, 0))
{
/* Don't NAT packet aimed at the intfc address */
if (is_interface_addr(sm, node, sw_if_index0, ip0->dst_address.as_u32))
dst_address /* changed member */);
ip0->checksum = ip_csum_fold (sum0);
+ if (icmp0->checksum == 0)
+ icmp0->checksum = 0xffff;
+
if (!icmp_is_error_message (icmp0))
{
new_id0 = sm0.port;
if (PREDICT_TRUE(next0 != SNAT_OUT2IN_NEXT_DROP && s0))
{
/* Accounting */
- s0->last_heard = now;
- s0->total_pkts++;
- s0->total_bytes += vlib_buffer_length_in_chain (sm->vlib_main, b0);
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (sm->vlib_main, b0));
/* Per-user LRU list maintenance */
- clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_list_head_index,
- s0->per_user_index);
+ nat44_session_update_lru (sm, s0, thread_index);
}
return next0;
}
-static snat_session_t *
-snat_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)
+static int
+nat_out2in_sm_unknown_proto (snat_main_t *sm,
+ vlib_buffer_t * b,
+ ip4_header_t * ip,
+ u32 rx_fib_index)
{
clib_bihash_kv_8_8_t kv, value;
- clib_bihash_kv_16_8_t s_kv, s_value;
snat_static_mapping_t *m;
snat_session_key_t m_key;
u32 old_addr, new_addr;
ip_csum_t sum;
- nat_ed_ses_key_t key;
- 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;
-
- key.l_addr = ip->dst_address;
- key.r_addr = ip->src_address;
- key.fib_index = rx_fib_index;
- key.proto = ip->protocol;
- key.r_port = 0;
- key.l_port = 0;
- s_kv.key[0] = key.as_u64[0];
- s_kv.key[1] = key.as_u64[1];
-
- if (!clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value))
- {
- s = pool_elt_at_index (tsm->sessions, s_value.value);
- new_addr = ip->dst_address.as_u32 = s->in2out.addr.as_u32;
- }
- else
- {
- if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index)))
- {
- b->error = node->errors[SNAT_OUT2IN_ERROR_MAX_SESSIONS_EXCEEDED];
- return 0;
- }
-
- m_key.addr = ip->dst_address;
- m_key.port = 0;
- m_key.protocol = 0;
- m_key.fib_index = rx_fib_index;
- kv.key = m_key.as_u64;
- if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
- {
- b->error = node->errors[SNAT_OUT2IN_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, &ip->src_address, m->fib_index,
- thread_index);
- if (!u)
- {
- clib_warning ("create NAT user failed");
- return 0;
- }
-
- /* Create a new session */
- s = nat_session_alloc_or_recycle (sm, u, thread_index);
- if (!s)
- {
- clib_warning ("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->outside_address_index = ~0;
- 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;
- u->nstaticsessions++;
-
- /* Add to lookup tables */
- s_kv.value = s - tsm->sessions;
- if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &s_kv, 1))
- clib_warning ("out2in key add failed");
-
- key.l_addr = ip->dst_address;
- key.fib_index = m->fib_index;
- s_kv.key[0] = key.as_u64[0];
- s_kv.key[1] = key.as_u64[1];
- if (clib_bihash_add_del_16_8 (&sm->in2out_ed, &s_kv, 1))
- clib_warning ("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;
-
- /* Accounting */
- s->last_heard = now;
- s->total_pkts++;
- s->total_bytes += vlib_buffer_length_in_chain (vm, b);
- /* Per-user LRU list maintenance */
- clib_dlist_remove (tsm->list_pool, s->per_user_index);
- clib_dlist_addtail (tsm->list_pool, s->per_user_list_head_index,
- s->per_user_index);
+ m_key.addr = ip->dst_address;
+ m_key.port = 0;
+ m_key.protocol = 0;
+ m_key.fib_index = 0;
+ kv.key = m_key.as_u64;
+ if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
+ return 1;
- return s;
-}
-
-static snat_session_t *
-snat_out2in_lb (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)
-{
- nat_ed_ses_key_t key;
- clib_bihash_kv_16_8_t s_kv, s_value;
- udp_header_t *udp = ip4_next_header (ip);
- tcp_header_t *tcp = (tcp_header_t *) udp;
- snat_session_t *s = 0;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- snat_session_key_t e_key, l_key;
- u32 old_addr, new_addr;
- u32 proto = ip_proto_to_snat_proto (ip->protocol);
- u16 new_port, old_port;
- ip_csum_t sum;
- snat_user_t *u;
- u32 address_index;
- snat_session_key_t eh_key;
- u8 twice_nat;
+ m = pool_elt_at_index (sm->static_mappings, value.value);
old_addr = ip->dst_address.as_u32;
-
- key.l_addr = ip->dst_address;
- key.r_addr = ip->src_address;
- key.fib_index = rx_fib_index;
- key.proto = ip->protocol;
- key.r_port = udp->src_port;
- key.l_port = udp->dst_port;
- s_kv.key[0] = key.as_u64[0];
- s_kv.key[1] = key.as_u64[1];
-
- if (!clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value))
- {
- s = pool_elt_at_index (tsm->sessions, s_value.value);
- }
- else
- {
- if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index)))
- {
- b->error = node->errors[SNAT_OUT2IN_ERROR_MAX_SESSIONS_EXCEEDED];
- return 0;
- }
-
- e_key.addr = ip->dst_address;
- e_key.port = udp->dst_port;
- e_key.protocol = proto;
- e_key.fib_index = rx_fib_index;
- if (snat_static_mapping_match(sm, e_key, &l_key, 1, 0, &twice_nat))
- return 0;
-
- u = nat_user_get_or_create (sm, &l_key.addr, l_key.fib_index,
- thread_index);
- if (!u)
- {
- clib_warning ("create NAT user failed");
- return 0;
- }
-
- s = nat_session_alloc_or_recycle (sm, u, thread_index);
- if (!s)
- {
- clib_warning ("create NAT session failed");
- return 0;
- }
-
- s->ext_host_addr.as_u32 = ip->src_address.as_u32;
- s->ext_host_port = udp->src_port;
- s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
- s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING;
- s->outside_address_index = ~0;
- s->out2in = e_key;
- s->in2out = l_key;
- u->nstaticsessions++;
-
- /* Add to lookup tables */
- s_kv.value = s - tsm->sessions;
- if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &s_kv, 1))
- clib_warning ("out2in-ed key add failed");
-
- if (twice_nat)
- {
- eh_key.protocol = proto;
- if (snat_alloc_outside_address_and_port (sm->twice_nat_addresses, 0,
- thread_index, &eh_key,
- &address_index,
- sm->port_per_thread,
- sm->per_thread_data[thread_index].snat_thread_index))
- {
- b->error = node->errors[SNAT_OUT2IN_ERROR_OUT_OF_PORTS];
- return 0;
- }
- key.r_addr.as_u32 = s->ext_host_nat_addr.as_u32 = eh_key.addr.as_u32;
- key.r_port = s->ext_host_nat_port = eh_key.port;
- s->flags |= SNAT_SESSION_FLAG_TWICE_NAT;
- }
- key.l_addr = l_key.addr;
- key.fib_index = l_key.fib_index;
- key.l_port = l_key.port;
- s_kv.key[0] = key.as_u64[0];
- s_kv.key[1] = key.as_u64[1];
- if (clib_bihash_add_del_16_8 (&sm->in2out_ed, &s_kv, 1))
- clib_warning ("in2out-ed key add failed");
- }
-
- new_addr = ip->dst_address.as_u32 = s->in2out.addr.as_u32;
-
- /* Update IP checksum */
+ new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32;
sum = ip->checksum;
sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address);
- if (is_twice_nat_session (s))
- sum = ip_csum_update (sum, ip->src_address.as_u32,
- s->ext_host_nat_addr.as_u32, ip4_header_t,
- src_address);
ip->checksum = ip_csum_fold (sum);
- if (PREDICT_TRUE(proto == SNAT_PROTOCOL_TCP))
- {
- old_port = tcp->dst_port;
- tcp->dst_port = s->in2out.port;
- new_port = tcp->dst_port;
-
- sum = tcp->checksum;
- sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address);
- sum = ip_csum_update (sum, old_port, new_port, ip4_header_t, length);
- if (is_twice_nat_session (s))
- {
- sum = ip_csum_update (sum, ip->src_address.as_u32,
- s->ext_host_nat_addr.as_u32, ip4_header_t,
- dst_address);
- sum = ip_csum_update (sum, tcp->src_port, s->ext_host_nat_port,
- ip4_header_t, length);
- tcp->src_port = s->ext_host_nat_port;
- ip->src_address.as_u32 = s->ext_host_nat_addr.as_u32;
- }
- tcp->checksum = ip_csum_fold(sum);
- }
- else
- {
- udp->dst_port = s->in2out.port;
- if (is_twice_nat_session (s))
- {
- udp->src_port = s->ext_host_nat_port;
- ip->src_address.as_u32 = s->ext_host_nat_addr.as_u32;
- }
- udp->checksum = 0;
- }
-
- vnet_buffer(b)->sw_if_index[VLIB_TX] = s->in2out.fib_index;
-
- /* Accounting */
- s->last_heard = now;
- s->total_pkts++;
- s->total_bytes += vlib_buffer_length_in_chain (vm, b);
- /* Per-user LRU list maintenance */
- clib_dlist_remove (tsm->list_pool, s->per_user_index);
- clib_dlist_addtail (tsm->list_pool, s->per_user_list_head_index,
- s->per_user_index);
-
- return s;
+ vnet_buffer(b)->sw_if_index[VLIB_TX] = m->fib_index;
+ return 0;
}
static uword
u32 pkts_processed = 0;
snat_main_t * sm = &snat_main;
f64 now = vlib_time_now (vm);
- u32 thread_index = vlib_get_thread_index ();
+ u32 thread_index = vm->thread_index;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
if (PREDICT_FALSE (proto0 == ~0))
{
- s0 = snat_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0,
- thread_index, now, vm, node);
- if (!s0)
- next0 = SNAT_OUT2IN_NEXT_DROP;
+ if (nat_out2in_sm_unknown_proto(sm, b0, ip0, rx_fib_index0))
+ {
+ if (!sm->forwarding_enabled)
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ }
+ }
goto trace0;
}
{
/* Try to match static mapping by external address and port,
destination address and port in packet */
- if (snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0))
+ if (snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0))
{
+ /*
+ * 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[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (proto0 != SNAT_PROTOCOL_UDP
- || (udp0->dst_port
- != clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto trace0;
+ next0 = SNAT_OUT2IN_NEXT_DROP;
}
- else
- goto trace0;
+ goto trace0;
}
/* Create session initiated by host from external network */
s0 = create_session_for_static_mapping(sm, b0, sm0, key0, node,
- thread_index);
+ thread_index, now);
if (!s0)
{
next0 = SNAT_OUT2IN_NEXT_DROP;
}
}
else
- {
- if (PREDICT_FALSE (value0.value == ~0ULL))
- {
- s0 = snat_out2in_lb(sm, b0, ip0, rx_fib_index0, thread_index,
- now, vm, node);
- if (!s0)
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto trace0;
- }
- else
- {
- s0 = pool_elt_at_index (
- sm->per_thread_data[thread_index].sessions,
- value0.value);
- }
- }
+ s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ value0.value);
old_addr0 = ip0->dst_address.as_u32;
ip0->dst_address = s0->in2out.addr;
}
/* Accounting */
- s0->last_heard = now;
- s0->total_pkts++;
- s0->total_bytes += vlib_buffer_length_in_chain (vm, b0);
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm, b0));
/* Per-user LRU list maintenance */
- clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_list_head_index,
- s0->per_user_index);
+ nat44_session_update_lru (sm, s0, thread_index);
trace0:
if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
if (PREDICT_FALSE (proto1 == ~0))
{
- s1 = snat_out2in_unknown_proto(sm, b1, ip1, rx_fib_index1,
- thread_index, now, vm, node);
- if (!s1)
- next1 = SNAT_OUT2IN_NEXT_DROP;
+ if (nat_out2in_sm_unknown_proto(sm, b1, ip1, rx_fib_index1))
+ {
+ if (!sm->forwarding_enabled)
+ {
+ b1->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
+ next1 = SNAT_OUT2IN_NEXT_DROP;
+ }
+ }
goto trace1;
}
{
/* Try to match static mapping by external address and port,
destination address and port in packet */
- if (snat_static_mapping_match(sm, key1, &sm1, 1, 0, 0))
+ if (snat_static_mapping_match(sm, key1, &sm1, 1, 0, 0, 0))
{
+ /*
+ * 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 trace1;
+ }
+
if (!sm->forwarding_enabled)
{
b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (proto1 != SNAT_PROTOCOL_UDP
- || (udp1->dst_port
- != clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))
- next1 = SNAT_OUT2IN_NEXT_DROP;
- goto trace1;
+ next1 = SNAT_OUT2IN_NEXT_DROP;
}
- else
- goto trace1;
+ goto trace1;
}
/* Create session initiated by host from external network */
s1 = create_session_for_static_mapping(sm, b1, sm1, key1, node,
- thread_index);
+ thread_index, now);
if (!s1)
{
next1 = SNAT_OUT2IN_NEXT_DROP;
}
}
else
- {
- if (PREDICT_FALSE (value1.value == ~0ULL))
- {
- s1 = snat_out2in_lb(sm, b1, ip1, rx_fib_index1, thread_index,
- now, vm, node);
- if (!s1)
- next1 = SNAT_OUT2IN_NEXT_DROP;
- goto trace1;
- }
- else
- {
- s1 = pool_elt_at_index (
- sm->per_thread_data[thread_index].sessions,
- value1.value);
- }
- }
+ s1 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ value1.value);
old_addr1 = ip1->dst_address.as_u32;
ip1->dst_address = s1->in2out.addr;
}
/* Accounting */
- s1->last_heard = now;
- s1->total_pkts++;
- s1->total_bytes += vlib_buffer_length_in_chain (vm, b1);
+ nat44_session_update_counters (s1, now,
+ vlib_buffer_length_in_chain (vm, b1));
/* Per-user LRU list maintenance */
- clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
- s1->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
- s1->per_user_list_head_index,
- s1->per_user_index);
+ nat44_session_update_lru (sm, s1, thread_index);
trace1:
if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
if (PREDICT_FALSE (proto0 == ~0))
{
- s0 = snat_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0,
- thread_index, now, vm, node);
- if (!s0)
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto trace00;
+ if (nat_out2in_sm_unknown_proto(sm, b0, ip0, rx_fib_index0))
+ {
+ if (!sm->forwarding_enabled)
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ }
+ }
+ goto trace00;
}
if (PREDICT_FALSE(ip0->ttl == 1))
{
/* Try to match static mapping by external address and port,
destination address and port in packet */
- if (snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0))
+ if (snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0))
{
+ /*
+ * 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[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (proto0 != SNAT_PROTOCOL_UDP
- || (udp0->dst_port
- != clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto trace00;
+ next0 = SNAT_OUT2IN_NEXT_DROP;
}
- else
- goto trace00;
+ goto trace00;
}
/* Create session initiated by host from external network */
s0 = create_session_for_static_mapping(sm, b0, sm0, key0, node,
- thread_index);
+ thread_index, now);
if (!s0)
{
next0 = SNAT_OUT2IN_NEXT_DROP;
}
}
else
- {
- if (PREDICT_FALSE (value0.value == ~0ULL))
- {
- s0 = snat_out2in_lb(sm, b0, ip0, rx_fib_index0, thread_index,
- now, vm, node);
- if (!s0)
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto trace00;
- }
- else
- {
- s0 = pool_elt_at_index (
- sm->per_thread_data[thread_index].sessions,
- value0.value);
- }
- }
+ s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ value0.value);
old_addr0 = ip0->dst_address.as_u32;
ip0->dst_address = s0->in2out.addr;
}
/* Accounting */
- s0->last_heard = now;
- s0->total_pkts++;
- s0->total_bytes += vlib_buffer_length_in_chain (vm, b0);
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm, b0));
/* Per-user LRU list maintenance */
- clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_list_head_index,
- s0->per_user_index);
+ nat44_session_update_lru (sm, s0, thread_index);
trace00:
if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
u32 pkts_processed = 0;
snat_main_t *sm = &snat_main;
f64 now = vlib_time_now (vm);
- u32 thread_index = vlib_get_thread_index ();
+ 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;
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
+ 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;
+ snat_session_key_t key0, sm0;
+ clib_bihash_kv_8_8_t kv0, value0;
+ snat_session_t * s0 = 0;
+ u16 old_port0, new_port0;
+ ip_csum_t sum0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ next0 = SNAT_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 = SNAT_OUT2IN_NEXT_DROP;
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT];
+ goto trace0;
+ }
+
+ ip0 = (ip4_header_t *) vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_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 = SNAT_OUT2IN_NEXT_DROP;
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_REASS];
+ nat_log_notice ("maximum reassemblies exceeded");
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
+ {
+ key0.addr = ip0->dst_address;
+ key0.port = udp0->dst_port;
+ key0.protocol = proto0;
+ key0.fib_index = rx_fib_index0;
+ kv0.key = key0.as_u64;
+
+ if (clib_bihash_search_8_8 (&per_thread_data->out2in, &kv0, &value0))
+ {
+ /* Try to match static mapping by external address and port,
+ destination address and port in packet */
+ if (snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0))
+ {
+ /*
+ * 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[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ }
+ goto trace0;
+ }
+
+ /* Create session initiated by host from external network */
+ s0 = create_session_for_static_mapping(sm, b0, sm0, key0, node,
+ thread_index, now);
+ if (!s0)
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
+ next0 = SNAT_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 (PREDICT_FALSE (reass0->sess_index == (u32) ~0))
+ {
+ if (nat_ip4_reass_add_fragment (reass0, bi0))
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_FRAG];
+ nat_log_notice ("maximum fragments per reassembly exceeded");
+ next0 = SNAT_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 */);
+ 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 */);
+ tcp0->checksum = ip_csum_fold(sum0);
+ }
+ else
+ {
+ old_port0 = udp0->dst_port;
+ udp0->dst_port = s0->in2out.port;
+ udp0->checksum = 0;
+ }
+ }
+
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm, b0));
+ /* 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_out2in_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 != SNAT_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 (from, fragments_to_loopback, sizeof (u32) * len);
+ n_left_from = len;
+ vec_reset_length (fragments_to_loopback);
+ }
+ else
+ {
+ clib_memcpy (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, nat44_out2in_reass_node.index,
+ SNAT_OUT2IN_ERROR_OUT2IN_PACKETS,
+ pkts_processed);
+
+ nat_send_all_to_node (vm, fragments_to_drop, node,
+ &node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT],
+ SNAT_OUT2IN_NEXT_DROP);
+
+ vec_free (fragments_to_drop);
+ vec_free (fragments_to_loopback);
+ return frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (nat44_out2in_reass_node) = {
+ .function = nat44_out2in_reass_node_fn,
+ .name = "nat44-out2in-reass",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_out2in_reass_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(snat_out2in_error_strings),
+ .error_strings = snat_out2in_error_strings,
+
+ .n_next_nodes = SNAT_OUT2IN_N_NEXT,
+
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [SNAT_OUT2IN_NEXT_DROP] = "error-drop",
+ [SNAT_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
+ [SNAT_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass",
+ },
+};
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_out2in_reass_node,
+ nat44_out2in_reass_node_fn);
+
+/*******************************/
+/*** endpoint-dependent mode ***/
+/*******************************/
+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_N_NEXT,
+} nat44_ed_out2in_next_t;
+
+typedef struct {
+ u32 sw_if_index;
+ u32 next_index;
+ u32 session_index;
+ u32 is_slow_path;
+} nat44_ed_out2in_trace_t;
+
+static u8 *
+format_nat44_ed_out2in_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ nat44_ed_out2in_trace_t *t = va_arg (*args, nat44_ed_out2in_trace_t *);
+ char * tag;
+
+ tag = t->is_slow_path ? "NAT44_OUT2IN_SLOW_PATH" : "NAT44_OUT2IN_FAST_PATH";
+
+ s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag,
+ t->sw_if_index, t->next_index, t->session_index);
+
+ return s;
+}
+
+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)
+{
+ 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 != SNAT_OUT2IN_NEXT_DROP && s0))
+ {
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (sm->vlib_main, b0));
+ }
+ return next0;
+}
+
+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)
+ {
+ ed_key.l_addr = s->in2out.addr;
+ ed_key.r_addr = s->ext_host_addr;
+ ed_key.fib_index = s->out2in.fib_index;
+ if (snat_is_unk_proto_session (s))
+ {
+ ed_key.proto = s->in2out.port;
+ ed_key.r_port = 0;
+ ed_key.l_port = 0;
+ }
+ 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(s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->in2out.protocol,
+ s->in2out.port,
+ s->out2in.port,
+ s->in2out.fib_index);
+
+ if (is_twice_nat_session (s))
+ {
+ for (i = 0; i < vec_len (sm->twice_nat_addresses); i++)
+ {
+ 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;
+ }
+ }
+ }
+
+ if (snat_is_session_static (s))
+ goto delete;
+
+ if (s->outside_address_index != ~0)
+ snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
+ &s->out2in);
+ delete:
+ nat44_delete_session (sm, s, ctx->thread_index);
+ return 1;
+ }
+
+ return 0;
+}
+
+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,
+ u8 is_lb,
+ f64 now)
+{
+ 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;
+ u32 address_index;
+ nat44_is_idle_session_ctx_t ctx;
+
+ if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index)))
+ {
+ b->error = node->errors[SNAT_OUT2IN_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");
+ return 0;
+ }
+
+ s = nat_ed_session_alloc (sm, u, thread_index);
+ if (!s)
+ {
+ nat44_delete_user_with_no_session (sm, u, thread_index);
+ nat_log_warn ("create NAT session failed");
+ return 0;
+ }
+
+ ip = vlib_buffer_get_current (b);
+ 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->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
+ if (is_lb)
+ s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING;
+ s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
+ s->outside_address_index = ~0;
+ 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");
+
+ if (twice_nat == TWICE_NAT || (twice_nat == TWICE_NAT_SELF &&
+ ip->src_address.as_u32 == l_key.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,
+ &address_index,
+ sm->port_per_thread,
+ tsm->snat_thread_index))
+ {
+ b->error = node->errors[SNAT_OUT2IN_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");
+ 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);
+ }
+ 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);
+ }
+ 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");
+
+ 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))
+ {
+ 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;
+ }
+ 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))
+ {
+ 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;
+ }
+ }
+ *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];
+
+ 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;
+
+ return 0;
+}
+
+static void
+create_bypass_for_fwd(snat_main_t * sm, 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);
+
+ if (ip->protocol == IP_PROTOCOL_ICMP)
+ {
+ if (icmp_get_ed_key (ip, &key))
+ 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;
+ }
+ 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))
+ {
+ s = pool_elt_at_index (tsm->sessions, value.value);
+ }
+ else
+ {
+ if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index)))
+ return;
+
+ u = nat_user_get_or_create (sm, &ip->dst_address, sm->inside_fib_index,
+ thread_index);
+ if (!u)
+ {
+ nat_log_warn ("create NAT user failed");
+ return;
+ }
+
+ s = nat_ed_session_alloc (sm, u, thread_index);
+ if (!s)
+ {
+ nat44_delete_user_with_no_session (sm, u, thread_index);
+ nat_log_warn ("create NAT session failed");
+ return;
+ }
+
+ s->ext_host_addr = key.r_addr;
+ s->ext_host_port = key.r_port;
+ s->flags |= SNAT_SESSION_FLAG_FWD_BYPASS;
+ s->outside_address_index = ~0;
+ 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");
+ }
+
+ 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;
+ }
+
+ /* Accounting */
+ nat44_session_update_counters (s, now, 0);
+}
+
+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)
+{
+ 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;
+ 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);
+
+ if (icmp_get_ed_key (ip, &key))
+ {
+ b->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
+ next = SNAT_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+ 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))
+ {
+ /* 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))
+ {
+ 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[SNAT_OUT2IN_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[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
+ next = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+
+ /* 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));
+
+ if (!s)
+ {
+ next = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE(icmp->type != ICMP4_echo_reply &&
+ icmp->type != ICMP4_echo_request &&
+ !icmp_is_error_message (icmp)))
+ {
+ b->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
+ next = SNAT_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+
+ s = pool_elt_at_index (tsm->sessions, value.value);
+ }
+
+ *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;
+}
+
+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))
+ {
+ s = pool_elt_at_index (tsm->sessions, s_value.value);
+ new_addr = ip->dst_address.as_u32 = s->in2out.addr.as_u32;
+ }
+ else
+ {
+ if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index)))
+ {
+ b->error = node->errors[SNAT_OUT2IN_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[SNAT_OUT2IN_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);
+ 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->outside_address_index = ~0;
+ 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;
+
+ /* Accounting */
+ nat44_session_update_counters (s, now,
+ vlib_buffer_length_in_chain (vm, b));
+
+ return s;
+}
+
+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)
+{
+ u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
+ nat44_ed_out2in_next_t next_index;
+ 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];
+
+ stats_node_index = is_slow_path ? nat44_ed_out2in_slowpath_node.index :
+ nat44_ed_out2in_node.index;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from >= 4 && n_left_to_next >= 2)
+ {
+ u32 bi0, bi1;
+ vlib_buffer_t *b0, *b1;
+ u32 next0, 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;
+ u8 is_lb0, is_lb1;
+ twice_nat_type_t twice_nat0, twice_nat1;
+
+ /* Prefetch next iteration. */
+ {
+ vlib_buffer_t * p2, * p3;
+
+ p2 = vlib_get_buffer (vm, from[2]);
+ p3 = vlib_get_buffer (vm, from[3]);
+
+ vlib_prefetch_buffer_header (p2, LOAD);
+ vlib_prefetch_buffer_header (p3, LOAD);
+
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
+ }
+
+ /* speculatively enqueue b0 and b1 to the current next frame */
+ to_next[0] = bi0 = from[0];
+ to_next[1] = bi1 = from[1];
+ from += 2;
+ to_next += 2;
+ n_left_from -= 2;
+ n_left_to_next -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ next0 = 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))
+ {
+ 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;
+ }
+
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ 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);
+ 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);
+ goto trace00;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE (proto0 == ~0 || proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
+ goto trace00;
+ }
+
+ if (ip4_is_fragment (ip0))
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT];
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto trace00;
+ }
+ }
+
+ 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)
+ {
+ /* 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, &is_lb0))
+ {
+ /*
+ * 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[SNAT_OUT2IN_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;
+ }
+
+ /* 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, is_lb0,
+ now);
+
+ if (!s0)
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto trace00;
+ }
+ }
+ else
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
+ goto trace00;
+ }
+ }
+ else
+ {
+ s0 = pool_elt_at_index (tsm->sessions, value0.value);
+ }
+
+ 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);
+
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ 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);
+ if (nat44_set_tcp_session_state_o2i (sm, s0, tcp0, thread_index))
+ goto trace00;
+ }
+ 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;
+ }
+
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm, b0));
+
+ 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_DROP;
+
+ 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 (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;
+ }
+
+ udp1 = ip4_next_header (ip1);
+ tcp1 = (tcp_header_t *) udp1;
+ icmp1 = (icmp46_header_t *) udp1;
+ proto1 = ip_proto_to_snat_proto (ip1->protocol);
+
+ if (is_slow_path)
+ {
+ if (PREDICT_FALSE (proto1 == ~0))
+ {
+ s1 = nat44_ed_out2in_unknown_proto(sm, b1, ip1, rx_fib_index1,
+ thread_index, now, vm, node);
+ 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);
+ goto trace01;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE (proto1 == ~0 || proto1 == SNAT_PROTOCOL_ICMP))
+ {
+ next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
+ goto trace01;
+ }
+
+ if (ip4_is_fragment (ip1))
+ {
+ b1->error = node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT];
+ next1 = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto trace01;
+ }
+ }
+
+ make_ed_kv (&kv1, &ip1->dst_address, &ip1->src_address, ip1->protocol,
+ rx_fib_index1, udp1->dst_port, udp1->src_port);
+
+ 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, &is_lb1))
+ {
+ /*
+ * 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[SNAT_OUT2IN_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;
+ }
+
+ /* 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, is_lb1,
+ now);
+
+ 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);
+ }
+
+ 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;
+
+ 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);
+
+ if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP))
+ {
+ 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);
+ if (nat44_set_tcp_session_state_o2i (sm, s1, tcp1, thread_index))
+ goto trace01;
+ }
+ else
+ {
+ 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;
+ }
+
+ /* Accounting */
+ nat44_session_update_counters (s1, now,
+ vlib_buffer_length_in_chain (vm, b1));
+
+ 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;
+ }
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ pkts_processed += next1 != NAT44_ED_OUT2IN_NEXT_DROP;
+
+ /* verify speculative enqueues, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0;
+ {
+ u32 bi0;
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;
- snat_session_key_t key0, sm0;
- clib_bihash_kv_8_8_t kv0, value0;
- snat_session_t * s0 = 0;
+ 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;
+ u8 is_lb0;
+ twice_nat_type_t twice_nat0;
/* speculatively enqueue b0 to the current next frame */
bi0 = from[0];
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
- next0 = SNAT_OUT2IN_NEXT_LOOKUP;
+ 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,
+ 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)))
+ if (PREDICT_FALSE(ip0->ttl == 1))
{
- next0 = SNAT_OUT2IN_NEXT_DROP;
- b0->error = node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT];
+ 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;
}
- 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 (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);
+ if (!sm->forwarding_enabled)
+ {
+ if (!s0)
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto trace0;
+ }
+ }
- if (PREDICT_FALSE (!reass0))
+ 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);
+ goto trace0;
+ }
+ }
+ else
{
- next0 = SNAT_OUT2IN_NEXT_DROP;
- b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_REASS];
- goto trace0;
+ if (PREDICT_FALSE (proto0 == ~0 || proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
+ goto trace0;
+ }
+
+ if (ip4_is_fragment (ip0))
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT];
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto trace0;
+ }
}
- if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
- {
- key0.addr = ip0->dst_address;
- key0.port = udp0->dst_port;
- key0.protocol = proto0;
- key0.fib_index = rx_fib_index0;
- kv0.key = key0.as_u64;
+ 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_8_8 (&per_thread_data->out2in, &kv0, &value0))
+ if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0))
+ {
+ if (is_slow_path)
{
/* Try to match static mapping by external address and port,
destination address and port in packet */
- if (snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0))
+ 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, &is_lb0))
{
+ /*
+ * 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[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (proto0 != SNAT_PROTOCOL_UDP
- || (udp0->dst_port
- != clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto trace0;
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
}
else
- goto trace0;
+ {
+ 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;
}
/* Create session initiated by host from external network */
- s0 = create_session_for_static_mapping(sm, b0, sm0, key0, node,
- thread_index);
+ s0 = create_session_for_static_mapping_ed(sm, b0, l_key0,
+ e_key0, node,
+ thread_index,
+ twice_nat0, is_lb0,
+ now);
+
if (!s0)
{
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- next0 = SNAT_OUT2IN_NEXT_DROP;
+ 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;
+ next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
+ goto trace0;
}
- nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
}
else
{
- if (PREDICT_FALSE (reass0->sess_index == (u32) ~0))
- {
- if (nat_ip4_reass_add_fragment (reass0, bi0))
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_FRAG];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto trace0;
- }
- cached0 = 1;
- goto trace0;
- }
- s0 = pool_elt_at_index (per_thread_data->sessions,
- reass0->sess_index);
+ s0 = pool_elt_at_index (tsm->sessions, value0.value);
}
old_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address = s0->in2out.addr;
- new_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 /* changed member */);
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
+ s0->ext_host_nat_addr.as_u32, ip4_header_t,
+ src_address);
ip0->checksum = ip_csum_fold (sum0);
- if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
{
- 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 */);
+ old_port0 = tcp0->dst_port;
+ new_port0 = tcp0->dst_port = s0->in2out.port;
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- tcp0->checksum = ip_csum_fold(sum0);
+ 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;
}
- else
+ tcp0->checksum = ip_csum_fold(sum0);
+ if (nat44_set_tcp_session_state_o2i (sm, s0, tcp0, thread_index))
+ goto trace0;
+ }
+ else
+ {
+ udp0->dst_port = s0->in2out.port;
+ if (is_twice_nat_session (s0))
{
- old_port0 = udp0->dst_port;
- udp0->dst_port = s0->in2out.port;
- udp0->checksum = 0;
+ udp0->src_port = s0->ext_host_nat_port;
+ ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
}
+ udp0->checksum = 0;
}
/* Accounting */
- s0->last_heard = now;
- s0->total_pkts++;
- s0->total_bytes += vlib_buffer_length_in_chain (vm, b0);
- /* Per-user LRU list maintenance */
- clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_list_head_index,
- s0->per_user_index);
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm, b0));
trace0:
if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
&& (b0->flags & VLIB_BUFFER_IS_TRACED)))
{
- nat44_out2in_reass_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->cached = cached0;
+ 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;
}
- if (cached0)
- {
- n_left_to_next++;
- to_next--;
- }
- else
- {
- pkts_processed += next0 != SNAT_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);
- }
+ pkts_processed += next0 != NAT44_ED_OUT2IN_NEXT_DROP;
- 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 (from, fragments_to_loopback, sizeof (u32) * len);
- n_left_from = len;
- vec_reset_length (fragments_to_loopback);
- }
- else
- {
- clib_memcpy (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;
- }
- }
- }
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
- vlib_node_increment_counter (vm, nat44_out2in_reass_node.index,
+ vlib_node_increment_counter (vm, stats_node_index,
SNAT_OUT2IN_ERROR_OUT2IN_PACKETS,
pkts_processed);
+ return frame->n_vectors;
+}
- nat_send_all_to_node (vm, fragments_to_drop, node,
- &node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT],
- SNAT_OUT2IN_NEXT_DROP);
+static uword
+nat44_ed_out2in_fast_path_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat44_ed_out2in_node_fn_inline (vm, node, frame, 0);
+}
- vec_free (fragments_to_drop);
- vec_free (fragments_to_loopback);
- return frame->n_vectors;
+VLIB_REGISTER_NODE (nat44_ed_out2in_node) = {
+ .function = nat44_ed_out2in_fast_path_fn,
+ .name = "nat44-ed-out2in",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_ed_out2in_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(snat_out2in_error_strings),
+ .error_strings = snat_out2in_error_strings,
+
+ .runtime_data_bytes = sizeof (snat_runtime_t),
+
+ .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT,
+
+ /* edit / add dispositions here */
+ .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",
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_out2in_node, nat44_ed_out2in_fast_path_fn);
+
+static uword
+nat44_ed_out2in_slow_path_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat44_ed_out2in_node_fn_inline (vm, node, frame, 1);
}
-VLIB_REGISTER_NODE (nat44_out2in_reass_node) = {
- .function = nat44_out2in_reass_node_fn,
- .name = "nat44-out2in-reass",
+VLIB_REGISTER_NODE (nat44_ed_out2in_slowpath_node) = {
+ .function = nat44_ed_out2in_slow_path_fn,
+ .name = "nat44-ed-out2in-slowpath",
.vector_size = sizeof (u32),
- .format_trace = format_nat44_out2in_reass_trace,
+ .format_trace = format_nat44_ed_out2in_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN(snat_out2in_error_strings),
.error_strings = snat_out2in_error_strings,
- .n_next_nodes = SNAT_OUT2IN_N_NEXT,
+ .runtime_data_bytes = sizeof (snat_runtime_t),
+
+ .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT,
/* edit / add dispositions here */
.next_nodes = {
- [SNAT_OUT2IN_NEXT_DROP] = "error-drop",
- [SNAT_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
- [SNAT_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass",
+ [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",
},
};
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_out2in_reass_node,
- nat44_out2in_reass_node_fn);
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_out2in_slowpath_node,
+ nat44_ed_out2in_slow_path_fn);
/**************************/
/*** deterministic mode ***/
snat_out2in_next_t next_index;
u32 pkts_processed = 0;
snat_main_t * sm = &snat_main;
- u32 thread_index = vlib_get_thread_index ();
+ u32 thread_index = vm->thread_index;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
dm0 = snat_det_map_by_out(sm, &ip0->dst_address);
if (PREDICT_FALSE(!dm0))
{
- clib_warning("unknown dst address: %U",
- format_ip4_address, &ip0->dst_address);
+ nat_log_info ("unknown dst address: %U",
+ format_ip4_address, &ip0->dst_address);
next0 = SNAT_OUT2IN_NEXT_DROP;
b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
goto trace0;
ses0 = snat_det_get_ses_by_out (dm0, &new_addr0, key0.as_u64);
if (PREDICT_FALSE(!ses0))
{
- clib_warning("no match src %U:%d dst %U:%d for user %U",
- format_ip4_address, &ip0->src_address,
- clib_net_to_host_u16 (tcp0->src),
- format_ip4_address, &ip0->dst_address,
- clib_net_to_host_u16 (tcp0->dst),
- format_ip4_address, &new_addr0);
+ nat_log_info ("no match src %U:%d dst %U:%d for user %U",
+ format_ip4_address, &ip0->src_address,
+ clib_net_to_host_u16 (tcp0->src),
+ format_ip4_address, &ip0->dst_address,
+ clib_net_to_host_u16 (tcp0->dst),
+ format_ip4_address, &new_addr0);
next0 = SNAT_OUT2IN_NEXT_DROP;
b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
goto trace0;
dm1 = snat_det_map_by_out(sm, &ip1->dst_address);
if (PREDICT_FALSE(!dm1))
{
- clib_warning("unknown dst address: %U",
- format_ip4_address, &ip1->dst_address);
+ nat_log_info ("unknown dst address: %U",
+ format_ip4_address, &ip1->dst_address);
next1 = SNAT_OUT2IN_NEXT_DROP;
b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
goto trace1;
ses1 = snat_det_get_ses_by_out (dm1, &new_addr1, key1.as_u64);
if (PREDICT_FALSE(!ses1))
{
- clib_warning("no match src %U:%d dst %U:%d for user %U",
- format_ip4_address, &ip1->src_address,
- clib_net_to_host_u16 (tcp1->src),
- format_ip4_address, &ip1->dst_address,
- clib_net_to_host_u16 (tcp1->dst),
- format_ip4_address, &new_addr1);
+ nat_log_info ("no match src %U:%d dst %U:%d for user %U",
+ format_ip4_address, &ip1->src_address,
+ clib_net_to_host_u16 (tcp1->src),
+ format_ip4_address, &ip1->dst_address,
+ clib_net_to_host_u16 (tcp1->dst),
+ format_ip4_address, &new_addr1);
next1 = SNAT_OUT2IN_NEXT_DROP;
b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
goto trace1;
dm0 = snat_det_map_by_out(sm, &ip0->dst_address);
if (PREDICT_FALSE(!dm0))
{
- clib_warning("unknown dst address: %U",
- format_ip4_address, &ip0->dst_address);
+ nat_log_info ("unknown dst address: %U",
+ format_ip4_address, &ip0->dst_address);
next0 = SNAT_OUT2IN_NEXT_DROP;
b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
goto trace00;
ses0 = snat_det_get_ses_by_out (dm0, &new_addr0, key0.as_u64);
if (PREDICT_FALSE(!ses0))
{
- clib_warning("no match src %U:%d dst %U:%d for user %U",
- format_ip4_address, &ip0->src_address,
- clib_net_to_host_u16 (tcp0->src),
- format_ip4_address, &ip0->dst_address,
- clib_net_to_host_u16 (tcp0->dst),
- format_ip4_address, &new_addr0);
+ nat_log_info ("no match src %U:%d dst %U:%d for user %U",
+ format_ip4_address, &ip0->src_address,
+ clib_net_to_host_u16 (tcp0->src),
+ format_ip4_address, &ip0->dst_address,
+ clib_net_to_host_u16 (tcp0->dst),
+ format_ip4_address, &new_addr0);
next0 = SNAT_OUT2IN_NEXT_DROP;
b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
goto trace00;
dont_translate = 1;
goto out;
}
- clib_warning("unknown dst address: %U",
- format_ip4_address, &ip0->dst_address);
+ nat_log_info ("unknown dst address: %U",
+ format_ip4_address, &ip0->dst_address);
goto out;
}
dont_translate = 1;
goto out;
}
- clib_warning("no match src %U:%d dst %U:%d for user %U",
- format_ip4_address, &key0.ext_host_addr,
- clib_net_to_host_u16 (key0.ext_host_port),
- format_ip4_address, &out_addr,
- clib_net_to_host_u16 (key0.out_port),
- format_ip4_address, &new_addr0);
+ nat_log_info ("no match src %U:%d dst %U:%d for user %U",
+ format_ip4_address, &key0.ext_host_addr,
+ clib_net_to_host_u16 (key0.ext_host_port),
+ format_ip4_address, &out_addr,
+ clib_net_to_host_u16 (key0.out_port),
+ format_ip4_address, &new_addr0);
b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
next0 = SNAT_OUT2IN_NEXT_DROP;
goto out;
{
snat_main_t *sm = &snat_main;
vlib_thread_main_t *tm = vlib_get_thread_main ();
- u32 n_left_from, *from, *to_next = 0;
+ u32 n_left_from, *from, *to_next = 0, *to_next_drop = 0;
static __thread vlib_frame_queue_elt_t **handoff_queue_elt_by_worker_index;
static __thread vlib_frame_queue_t **congested_handoff_queue_by_worker_index
= 0;
vlib_frame_queue_elt_t *hf = 0;
+ vlib_frame_queue_t *fq;
vlib_frame_t *f = 0;
int i;
u32 n_left_to_next_worker = 0, *to_next_worker = 0;
u32 next_worker_index = 0;
u32 current_worker_index = ~0;
- u32 thread_index = vlib_get_thread_index ();
+ u32 thread_index = vm->thread_index;
+ vlib_frame_t *d = 0;
ASSERT (vec_len (sm->workers));
vec_validate (handoff_queue_elt_by_worker_index, tm->n_vlib_mains - 1);
vec_validate_init_empty (congested_handoff_queue_by_worker_index,
- sm->first_worker_index + sm->num_workers - 1,
+ tm->n_vlib_mains - 1,
(vlib_frame_queue_t *) (~0));
}
if (next_worker_index != current_worker_index)
{
+ fq = is_vlib_frame_queue_congested (
+ sm->fq_out2in_index, next_worker_index, NAT_FQ_NELTS - 2,
+ congested_handoff_queue_by_worker_index);
+
+ if (fq)
+ {
+ /* if this is 1st frame */
+ if (!d)
+ {
+ d = vlib_get_frame_to_node (vm, sm->error_node_index);
+ to_next_drop = vlib_frame_vector_args (d);
+ }
+
+ to_next_drop[0] = bi0;
+ to_next_drop += 1;
+ d->n_vectors++;
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_FQ_CONGESTED];
+ goto trace0;
+ }
+
if (hf)
hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
f->n_vectors++;
}
+trace0:
if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
&& (b0->flags & VLIB_BUFFER_IS_TRACED)))
{
if (f)
vlib_put_frame_to_node (vm, sm->out2in_node_index, f);
+ if (d)
+ vlib_put_frame_to_node (vm, sm->error_node_index, d);
+
if (hf)
hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
.format_trace = format_snat_out2in_worker_handoff_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(snat_out2in_error_strings),
+ .error_strings = snat_out2in_error_strings,
+
.n_next_nodes = 1,
.next_nodes = {
sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0);
- vnet_feature_next (sw_if_index0, &next0, b0);
+ vnet_feature_next (&next0, b0);
if (PREDICT_FALSE(ip0->ttl == 1))
{
key0.port = udp0->dst_port;
key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0))
+ if (snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0))
{
b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
goto trace00;
Code Review / vpp.git / blobdiff