#define foreach_snat_out2in_error \
_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \
_(OUT2IN_PACKETS, "Good out2in packets processed") \
+_(OUT_OF_PORTS, "Out of ports") \
_(BAD_ICMP_TYPE, "unsupported ICMP type") \
_(NO_TRANSLATION, "No translation") \
_(MAX_SESSIONS_EXCEEDED, "Maximum sessions exceeded") \
SNAT_OUT2IN_NEXT_LOOKUP,
SNAT_OUT2IN_NEXT_ICMP_ERROR,
SNAT_OUT2IN_NEXT_REASS,
+ SNAT_OUT2IN_NEXT_IN2OUT,
SNAT_OUT2IN_N_NEXT,
} snat_out2in_next_t;
u32 thread_index)
{
snat_user_t *u;
- snat_user_key_t user_key;
snat_session_t *s;
- clib_bihash_kv_8_8_t kv0, value0;
- dlist_elt_t * per_user_translation_list_elt;
- dlist_elt_t * per_user_list_head_elt;
+ clib_bihash_kv_8_8_t kv0;
ip4_header_t *ip0;
udp_header_t *udp0;
ip0 = vlib_buffer_get_current (b0);
udp0 = ip4_next_header (ip0);
- user_key.addr = in2out.addr;
- user_key.fib_index = in2out.fib_index;
- kv0.key = user_key.as_u64;
-
- /* Ever heard of the "user" = inside ip4 address before? */
- if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].user_hash,
- &kv0, &value0))
+ u = nat_user_get_or_create (sm, &in2out.addr, in2out.fib_index, thread_index);
+ if (!u)
{
- /* no, make a new one */
- pool_get (sm->per_thread_data[thread_index].users, u);
- memset (u, 0, sizeof (*u));
- u->addr = in2out.addr;
- u->fib_index = in2out.fib_index;
-
- pool_get (sm->per_thread_data[thread_index].list_pool,
- per_user_list_head_elt);
-
- u->sessions_per_user_list_head_index = per_user_list_head_elt -
- sm->per_thread_data[thread_index].list_pool;
-
- clib_dlist_init (sm->per_thread_data[thread_index].list_pool,
- u->sessions_per_user_list_head_index);
-
- kv0.value = u - sm->per_thread_data[thread_index].users;
-
- /* add user */
- clib_bihash_add_del_8_8 (&sm->per_thread_data[thread_index].user_hash,
- &kv0, 1 /* is_add */);
+ clib_warning ("create NAT user failed");
+ return 0;
}
- else
+
+ s = nat_session_alloc_or_recycle (sm, u, thread_index);
+ if (!s)
{
- u = pool_elt_at_index (sm->per_thread_data[thread_index].users,
- value0.value);
+ clib_warning ("create NAT session failed");
+ return 0;
}
- pool_get (sm->per_thread_data[thread_index].sessions, s);
- memset (s, 0, sizeof (*s));
-
s->outside_address_index = ~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++;
-
- /* Create list elts */
- pool_get (sm->per_thread_data[thread_index].list_pool,
- per_user_translation_list_elt);
- clib_dlist_init (sm->per_thread_data[thread_index].list_pool,
- per_user_translation_list_elt -
- sm->per_thread_data[thread_index].list_pool);
-
- per_user_translation_list_elt->value =
- s - sm->per_thread_data[thread_index].sessions;
- s->per_user_index =
- per_user_translation_list_elt - sm->per_thread_data[thread_index].list_pool;
- s->per_user_list_head_index = u->sessions_per_user_list_head_index;
-
- clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
- s->per_user_list_head_index,
- per_user_translation_list_elt -
- sm->per_thread_data[thread_index].list_pool);
-
+ user_session_increment (sm, u, 1 /* static */);
s->in2out = in2out;
s->out2in = out2in;
s->in2out.protocol = out2in.protocol;
clib_warning ("in2out key add failed");
kv0.key = s->out2in.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].out2in, &kv0,
1 /* is_add */))
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;
+}
+
+static int
+next_src_nat (snat_main_t * sm, ip4_header_t * ip, u32 proto, u16 src_port,
+ u32 thread_index)
+{
+ snat_session_key_t key;
+ clib_bihash_kv_8_8_t kv, value;
+
+ key.addr = ip->src_address;
+ key.port = src_port;
+ key.protocol = proto;
+ key.fib_index = sm->inside_fib_index;
+ kv.key = key.as_u64;
+
+ if (!clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].in2out, &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];
+
+ 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 (&sm->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)
+ {
+ clib_warning ("create NAT user failed");
+ return;
+ }
+
+ s = nat_session_alloc_or_recycle (sm, u, thread_index);
+ if (!s)
+ {
+ clib_warning ("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 (&sm->in2out_ed, &kv, 1))
+ clib_warning ("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 (sm, s, tcp, thread_index))
+ return;
+ }
+ /* 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);
+}
+
/**
* 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))
+ if (snat_static_mapping_match(sm, key0, &sm0, 1, &is_addr_only, 0, 0))
{
- /* Don't NAT packet aimed at the intfc address */
- if (PREDICT_FALSE(is_interface_addr(sm, node, sw_if_index0,
- ip0->dst_address.as_u32)))
+ if (!sm->forwarding_enabled)
+ {
+ /* Don't NAT packet aimed at the intfc address */
+ if (PREDICT_FALSE(is_interface_addr(sm, node, sw_if_index0,
+ ip0->dst_address.as_u32)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+ else
{
dont_translate = 1;
+ if (next_src_nat(sm, ip0, key0.protocol, key0.port, thread_index))
+ {
+ next0 = SNAT_OUT2IN_NEXT_IN2OUT;
+ goto out;
+ }
+ create_bypass_for_fwd(sm, ip0, rx_fib_index0, thread_index);
goto out;
}
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto out;
}
if (PREDICT_FALSE(icmp0->type != ICMP4_echo_reply &&
goto out;
}
- s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value0.value);
+ 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);
}
out:
}
key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, key0, &sm0, 1, &is_addr_only))
+ 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;
s0->last_heard = now;
s0->total_pkts++;
s0->total_bytes += vlib_buffer_length_in_chain (sm->vlib_main, b0);
- /* Per-user LRU list maintenance for dynamic translation */
- if (!snat_is_session_static (s0))
- {
- clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_list_head_index,
- s0->per_user_index);
- }
+ /* 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);
}
return next0;
}
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_key_t u_key;
snat_user_t *u;
- dlist_elt_t *head, *elt;
old_addr = ip->dst_address.as_u32;
key.r_addr = ip->src_address;
key.fib_index = rx_fib_index;
key.proto = ip->protocol;
- key.rsvd = 0;
+ key.r_port = 0;
key.l_port = 0;
s_kv.key[0] = key.as_u64[0];
s_kv.key[1] = key.as_u64[1];
new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32;
- u_key.addr = ip->src_address;
- u_key.fib_index = m->fib_index;
- kv.key = u_key.as_u64;
-
- /* Ever heard of the "user" = src ip4 address before? */
- if (clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
- {
- /* no, make a new one */
- pool_get (tsm->users, u);
- memset (u, 0, sizeof (*u));
- u->addr = ip->src_address;
- u->fib_index = rx_fib_index;
-
- pool_get (tsm->list_pool, head);
- u->sessions_per_user_list_head_index = head - tsm->list_pool;
-
- clib_dlist_init (tsm->list_pool,
- u->sessions_per_user_list_head_index);
-
- kv.value = u - tsm->users;
-
- /* add user */
- clib_bihash_add_del_8_8 (&tsm->user_hash, &kv, 1);
- }
- else
+ u = nat_user_get_or_create (sm, &ip->src_address, m->fib_index,
+ thread_index);
+ if (!u)
{
- u = pool_elt_at_index (tsm->users, value.value);
+ clib_warning ("create NAT user failed");
+ return 0;
}
/* Create a new session */
- pool_get (tsm->sessions, s);
- memset (s, 0, sizeof (*s));
+ 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->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;
- u->nstaticsessions++;
-
- /* Create list elts */
- pool_get (tsm->list_pool, elt);
- clib_dlist_init (tsm->list_pool, elt - tsm->list_pool);
- elt->value = s - tsm->sessions;
- s->per_user_index = elt - tsm->list_pool;
- s->per_user_list_head_index = u->sessions_per_user_list_head_index;
- clib_dlist_addtail (tsm->list_pool, s->per_user_list_head_index,
- s->per_user_index);
+ user_session_increment (sm, u, 1 /* static */);
/* Add to lookup tables */
s_kv.value = s - tsm->sessions;
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;
- clib_bihash_kv_8_8_t kv, value;
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_key_t u_key;
snat_user_t *u;
- dlist_elt_t *head, *elt;
+ u32 address_index;
+ snat_session_key_t eh_key;
+ twice_nat_type_t twice_nat;
+ u8 lb;
old_addr = ip->dst_address.as_u32;
key.r_addr = ip->src_address;
key.fib_index = rx_fib_index;
key.proto = ip->protocol;
- key.rsvd = 0;
+ 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];
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))
+ if (snat_static_mapping_match(sm, e_key, &l_key, 1, 0, &twice_nat, &lb))
return 0;
- u_key.addr = l_key.addr;
- u_key.fib_index = l_key.fib_index;
- kv.key = u_key.as_u64;
-
- /* Ever heard of the "user" = src ip4 address before? */
- if (clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
- {
- /* no, make a new one */
- pool_get (tsm->users, u);
- memset (u, 0, sizeof (*u));
- u->addr = l_key.addr;
- u->fib_index = l_key.fib_index;
-
- pool_get (tsm->list_pool, head);
- u->sessions_per_user_list_head_index = head - tsm->list_pool;
-
- clib_dlist_init (tsm->list_pool,
- u->sessions_per_user_list_head_index);
-
- kv.value = u - tsm->users;
+ 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;
+ }
- /* add user */
- if (clib_bihash_add_del_8_8 (&tsm->user_hash, &kv, 1))
- clib_warning ("user key add failed");
- }
- else
+ s = nat_session_alloc_or_recycle (sm, u, thread_index);
+ if (!s)
{
- u = pool_elt_at_index (tsm->users, value.value);
+ clib_warning ("create NAT session failed");
+ return 0;
}
- /* Create a new session */
- pool_get (tsm->sessions, s);
- memset (s, 0, sizeof (*s));
-
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;
+ if (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;
- u->nstaticsessions++;
-
- /* Create list elts */
- pool_get (tsm->list_pool, elt);
- clib_dlist_init (tsm->list_pool, elt - tsm->list_pool);
- elt->value = s - tsm->sessions;
- s->per_user_index = elt - tsm->list_pool;
- s->per_user_list_head_index = u->sessions_per_user_list_head_index;
- clib_dlist_addtail (tsm->list_pool, s->per_user_list_head_index,
- s->per_user_index);
+ user_session_increment (sm, u, 1 /* static */);
/* 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 == TWICE_NAT ||
+ (twice_nat == TWICE_NAT_SELF &&
+ ip->src_address.as_u32 == l_key.addr.as_u32))
+ {
+ 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;
/* Update IP checksum */
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);
+ vnet_buffer(b)->sw_if_index[VLIB_TX] = s->in2out.fib_index;
+
if (PREDICT_TRUE(proto == SNAT_PROTOCOL_TCP))
{
old_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);
+ if (nat44_set_tcp_session_state (sm, s, tcp, thread_index))
+ return s;
}
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;
}
{
s0 = snat_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0,
thread_index, now, vm, node);
- if (!s0)
- next0 = SNAT_OUT2IN_NEXT_DROP;
+ if (!sm->forwarding_enabled)
+ if (!s0)
+ 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))
+ if (snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0))
{
- 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;
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP
+ && (udp0->dst_port ==
+ clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client))))
+ {
+ vnet_feature_next
+ (vnet_buffer (b0)->sw_if_index[VLIB_RX], &next0, b0);
+ goto trace0;
+ }
+
+ if (!sm->forwarding_enabled)
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto trace0;
+ }
+ else
+ {
+ if (next_src_nat(sm, ip0, proto0, udp0->src_port, thread_index))
+ {
+ next0 = SNAT_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 */
ip4_header_t /* cheat */,
length /* changed member */);
tcp0->checksum = ip_csum_fold(sum0);
+ if (nat44_set_tcp_session_state (sm, s0, tcp0, thread_index))
+ goto trace0;
}
else
{
s0->last_heard = now;
s0->total_pkts++;
s0->total_bytes += vlib_buffer_length_in_chain (vm, b0);
- /* Per-user LRU list maintenance for dynamic translation */
- if (!snat_is_session_static (s0))
- {
- clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_list_head_index,
- s0->per_user_index);
- }
+ /* 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);
trace0:
if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
{
s1 = snat_out2in_unknown_proto(sm, b1, ip1, rx_fib_index1,
thread_index, now, vm, node);
- if (!s1)
- next1 = SNAT_OUT2IN_NEXT_DROP;
+ if (!sm->forwarding_enabled)
+ if (!s1)
+ 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))
+ if (snat_static_mapping_match(sm, key1, &sm1, 1, 0, 0, 0))
{
- 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;
+ if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_UDP
+ && (udp1->dst_port ==
+ clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client))))
+ {
+ vnet_feature_next
+ (vnet_buffer (b1)->sw_if_index[VLIB_RX], &next1, b1);
+ goto trace1;
+ }
+
+ if (!sm->forwarding_enabled)
+ {
+ b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
+ next1 = SNAT_OUT2IN_NEXT_DROP;
+ goto trace1;
+ }
+ else
+ {
+ if (next_src_nat(sm, ip1, proto1, udp1->src_port, thread_index))
+ {
+ next1 = SNAT_OUT2IN_NEXT_IN2OUT;
+ goto trace1;
+ }
+ create_bypass_for_fwd(sm, ip1, rx_fib_index1, thread_index);
+ goto trace1;
+ }
}
/* Create session initiated by host from external network */
ip4_header_t /* cheat */,
length /* changed member */);
tcp1->checksum = ip_csum_fold(sum1);
+ if (nat44_set_tcp_session_state (sm, s1, tcp1, thread_index))
+ goto trace1;
}
else
{
s1->last_heard = now;
s1->total_pkts++;
s1->total_bytes += vlib_buffer_length_in_chain (vm, b1);
- /* Per-user LRU list maintenance for dynamic translation */
- if (!snat_is_session_static (s1))
- {
- 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);
- }
+ /* 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);
trace1:
if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
{
s0 = snat_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0,
thread_index, now, vm, node);
- if (!s0)
- next0 = SNAT_OUT2IN_NEXT_DROP;
+ if (!sm->forwarding_enabled)
+ if (!s0)
+ next0 = SNAT_OUT2IN_NEXT_DROP;
goto trace00;
}
{
/* 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))
+ if (snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0))
{
- 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;
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP
+ && (udp0->dst_port ==
+ clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client))))
+ {
+ vnet_feature_next
+ (vnet_buffer (b0)->sw_if_index[VLIB_RX], &next0, b0);
+ goto trace00;
+ }
+
+ if (!sm->forwarding_enabled)
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto trace00;
+ }
+ else
+ {
+ if (next_src_nat(sm, ip0, proto0, udp0->src_port, thread_index))
+ {
+ next0 = SNAT_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 */
ip4_header_t /* cheat */,
length /* changed member */);
tcp0->checksum = ip_csum_fold(sum0);
+ if (nat44_set_tcp_session_state (sm, s0, tcp0, thread_index))
+ goto trace00;
}
else
{
s0->last_heard = now;
s0->total_pkts++;
s0->total_bytes += vlib_buffer_length_in_chain (vm, b0);
- /* Per-user LRU list maintenance for dynamic translation */
- if (!snat_is_session_static (s0))
- {
- clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_list_head_index,
- s0->per_user_index);
- }
+ /* 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);
trace00:
if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
[SNAT_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
[SNAT_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
[SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass",
+ [SNAT_OUT2IN_NEXT_IN2OUT] = "nat44-in2out",
},
};
VLIB_NODE_FUNCTION_MULTIARCH (snat_out2in_node, snat_out2in_node_fn);
{
/* 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))
+ if (snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0))
{
- 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;
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP
+ && (udp0->dst_port
+ == clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client))))
+ {
+ vnet_feature_next
+ (vnet_buffer (b0)->sw_if_index[VLIB_RX],
+ &next0, b0);
+ goto trace0;
+ }
+
+ if (!sm->forwarding_enabled)
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto trace0;
+ }
+ else
+ {
+ if (next_src_nat(sm, ip0, proto0, udp0->src_port, thread_index))
+ {
+ next0 = SNAT_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 */
ip4_header_t /* cheat */,
length /* changed member */);
tcp0->checksum = ip_csum_fold(sum0);
+ if (nat44_set_tcp_session_state (sm, s0, tcp0, thread_index))
+ goto trace0;
}
else
{
s0->last_heard = now;
s0->total_pkts++;
s0->total_bytes += vlib_buffer_length_in_chain (vm, b0);
- /* Per-user LRU list maintenance for dynamic translation */
- if (!snat_is_session_static (s0))
- {
- clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_list_head_index,
- s0->per_user_index);
- }
+ /* 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);
trace0:
if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
[SNAT_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
[SNAT_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
[SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass",
+ [SNAT_OUT2IN_NEXT_IN2OUT] = "nat44-in2out",
},
};
VLIB_NODE_FUNCTION_MULTIARCH (nat44_out2in_reass_node,
[SNAT_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
[SNAT_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
[SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass",
+ [SNAT_OUT2IN_NEXT_IN2OUT] = "nat44-in2out",
},
};
VLIB_NODE_FUNCTION_MULTIARCH (snat_det_out2in_node, snat_det_out2in_node_fn);
key0.port = udp0->dst_port;
key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, key0, &sm0, 1, 0))
+ if (snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0))
{
b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
goto trace00;
[SNAT_OUT2IN_NEXT_DROP] = "error-drop",
[SNAT_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
[SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass",
+ [SNAT_OUT2IN_NEXT_IN2OUT] = "nat44-in2out",
},
};
VLIB_NODE_FUNCTION_MULTIARCH (snat_out2in_fast_node, snat_out2in_fast_node_fn);
Code Review / vpp.git / blobdiff