&value0))
{
/* or is static mappings */
- if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0))
+ if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0))
return 0;
}
else
rx_fib_index0);
}
+static inline int
+nat_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip0,
+ u32 proto0, u16 src_port, u16 dst_port,
+ u32 thread_index, u32 sw_if_index)
+{
+ snat_session_key_t key0;
+ clib_bihash_kv_8_8_t kv0, value0;
+ snat_interface_t *i;
+
+ /* src NAT check */
+ key0.addr = ip0->src_address;
+ key0.port = src_port;
+ key0.protocol = proto0;
+ key0.fib_index = sm->outside_fib_index;
+ kv0.key = key0.as_u64;
+
+ if (!clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].out2in, &kv0,
+ &value0))
+ return 1;
+
+ /* dst NAT check */
+ key0.addr = ip0->dst_address;
+ key0.port = dst_port;
+ key0.protocol = proto0;
+ key0.fib_index = sm->inside_fib_index;
+ kv0.key = key0.as_u64;
+ if (!clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].in2out, &kv0,
+ &value0))
+ {
+ /* hairpinning */
+ pool_foreach (i, sm->output_feature_interfaces,
+ ({
+ if ((nat_interface_is_inside(i)) && (sw_if_index == i->sw_if_index))
+ return 0;
+ }));
+ return 1;
+ }
+
+ return 0;
+}
+
static u32 slow_path (snat_main_t *sm, vlib_buffer_t *b0,
ip4_header_t * ip0,
u32 rx_fib_index0,
u32 outside_fib_index;
uword * p;
udp_header_t * udp0 = ip4_next_header (ip0);
+ u8 is_sm = 0;
if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index)))
{
}
/* First try to match static mapping by local address and port */
- if (snat_static_mapping_match (sm, *key0, &key1, 0, 0, 0))
+ if (snat_static_mapping_match (sm, *key0, &key1, 0, 0, 0, 0))
{
/* Try to create dynamic translation */
if (snat_alloc_outside_address_and_port (sm->addresses, rx_fib_index0,
b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS];
return SNAT_IN2OUT_NEXT_DROP;
}
- u->nsessions++;
}
else
- {
- u->nstaticsessions++;
- }
+ is_sm = 1;
s = nat_session_alloc_or_recycle (sm, u, thread_index);
if (!s)
return SNAT_IN2OUT_NEXT_DROP;
}
- if (address_index == ~0)
+ if (is_sm)
s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
+ user_session_increment (sm, u, is_sm);
s->outside_address_index = address_index;
s->in2out = *key0;
s->out2in = key1;
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 = 0;
+ 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->src_address;
+ key0.r_addr = ip0->dst_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.r_addr = inner_ip0->src_address;
+ key0.l_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.r_port = key0.l_port = inner_echo0->identifier;
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ key0.l_port = ((tcp_udp_header_t*)l4_header)->dst_port;
+ key0.r_port = ((tcp_udp_header_t*)l4_header)->src_port;
+ break;
+ default:
+ return SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL;
+ }
+ }
+ *p_key0 = key0;
+ return 0;
+}
+
+static inline int
+nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip,
+ u32 thread_index)
+{
+ nat_ed_ses_key_t key;
+ clib_bihash_kv_16_8_t kv, value;
+ udp_header_t *udp;
+ snat_session_t *s = 0;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+
+ if (!sm->forwarding_enabled)
+ return 0;
+
+ if (ip->protocol == IP_PROTOCOL_ICMP)
+ {
+ if (icmp_get_ed_key (ip, &key))
+ return 0;
+ }
+ else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
+ {
+ udp = ip4_next_header(ip);
+ key.l_addr = ip->src_address;
+ key.r_addr = ip->dst_address;
+ key.proto = ip->protocol;
+ key.r_port = udp->dst_port;
+ key.l_port = udp->src_port;
+ }
+ else
+ {
+ key.l_addr = ip->src_address;
+ key.r_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 (sm->per_thread_data[thread_index].sessions, value.value);
+ if (is_fwd_bypass_session (s))
+ {
+ if (ip->protocol == IP_PROTOCOL_TCP)
+ {
+ tcp_header_t *tcp = ip4_next_header(ip);
+ nat44_set_tcp_session_state (sm, s, tcp, thread_index);
+ }
+ /* 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 1;
+ }
+ else
+ return 0;
+ }
+
+ return 0;
+}
+
/**
* Get address and port values to be used for ICMP packet translation
* and create session if needed
if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].in2out, &kv0,
&value0))
{
- if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0, ip0,
- IP_PROTOCOL_ICMP, rx_fib_index0, thread_index) &&
- vnet_buffer(b0)->sw_if_index[VLIB_TX] == ~0))
+ if (vnet_buffer(b0)->sw_if_index[VLIB_TX] != ~0)
{
- dont_translate = 1;
- goto out;
+ if (PREDICT_FALSE(nat_not_translate_output_feature(sm,
+ ip0, SNAT_PROTOCOL_ICMP, key0.port, key0.port, thread_index, sw_if_index0)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0,
+ ip0, SNAT_PROTOCOL_ICMP, rx_fib_index0, thread_index)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
}
if (PREDICT_FALSE(icmp_is_error_message (icmp0)))
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_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL];
+ next0 = SNAT_IN2OUT_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->in2out_ed, &s_kv, &s_value))
+ s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ s_value.value);
+ else
+ {
+ next0 = SNAT_IN2OUT_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, 0, &is_addr_only, 0))
+ if (snat_static_mapping_match(sm, key0, &sm0, 0, &is_addr_only, 0, 0))
{
if (PREDICT_FALSE(snat_not_translate_fast(sm, node, sw_if_index0, ip0,
IP_PROTOCOL_ICMP, rx_fib_index0)))
src_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;
kv0.key = key0.as_u64;
/* Check if destination is static mappings */
- if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0))
+ if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0))
{
new_dst_addr0 = sm0.addr.as_u32;
new_dst_port0 = sm0.port;
&value0))
{
/* or static mappings */
- if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0))
+ if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0))
{
new_dst_addr0 = sm0.addr.as_u32;
vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
key.fib_index = rx_fib_index;
key.proto = ip->protocol;
key.l_port = 0;
- key.l_port = 0;
+ key.r_port = 0;
s_kv.key[0] = key.as_u64[0];
s_kv.key[1] = key.as_u64[1];
else
{
/* Choose same out address as for TCP/UDP session to same destination */
- if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
+ head_index = u->sessions_per_user_list_head_index;
+ head = pool_elt_at_index (tsm->list_pool, head_index);
+ elt_index = head->next;
+ if (PREDICT_FALSE (elt_index == ~0))
+ ses_index = ~0;
+ else
+ {
+ elt = pool_elt_at_index (tsm->list_pool, elt_index);
+ ses_index = elt->value;
+ }
+
+ while (ses_index != ~0)
{
- head_index = u->sessions_per_user_list_head_index;
- head = pool_elt_at_index (tsm->list_pool, head_index);
- elt_index = head->next;
+ s = pool_elt_at_index (tsm->sessions, ses_index);
+ elt_index = elt->next;
elt = pool_elt_at_index (tsm->list_pool, elt_index);
ses_index = elt->value;
- while (ses_index != ~0)
- {
- s = pool_elt_at_index (tsm->sessions, ses_index);
- elt_index = elt->next;
- elt = pool_elt_at_index (tsm->list_pool, elt_index);
- ses_index = elt->value;
- if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32)
- {
- new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
- address_index = s->outside_address_index;
+ if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32)
+ {
+ new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
+ address_index = s->outside_address_index;
- key.fib_index = sm->outside_fib_index;
- key.l_addr.as_u32 = new_addr;
- 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))
- break;
+ key.fib_index = sm->outside_fib_index;
+ key.l_addr.as_u32 = new_addr;
+ 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))
+ break;
- goto create_ses;
- }
+ goto create_ses;
}
}
key.fib_index = sm->outside_fib_index;
s->ext_host_addr.as_u32 = ip->dst_address.as_u32;
s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
+ s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
s->outside_address_index = address_index;
s->out2in.addr.as_u32 = new_addr;
s->out2in.fib_index = sm->outside_fib_index;
s->in2out.fib_index = rx_fib_index;
s->in2out.port = s->out2in.port = ip->protocol;
if (is_sm)
- {
- u->nstaticsessions++;
- s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
- }
- else
- {
- u->nsessions++;
- }
+ s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
+ user_session_increment (sm, u, is_sm);
/* Add to lookup tables */
key.l_addr.as_u32 = old_addr;
u32 proto = ip_proto_to_snat_proto (ip->protocol);
snat_session_key_t e_key, l_key;
snat_user_t *u;
+ u8 lb;
old_addr = ip->src_address.as_u32;
if (!clib_bihash_search_16_8 (&sm->in2out_ed, &s_kv, &s_value))
{
s = pool_elt_at_index (tsm->sessions, s_value.value);
+ if (is_fwd_bypass_session (s))
+ {
+ if (ip->protocol == IP_PROTOCOL_TCP)
+ nat44_set_tcp_session_state (sm, s, tcp, thread_index);
+ /* 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 0;
+ }
}
else
{
l_key.port = udp->src_port;
l_key.protocol = proto;
l_key.fib_index = rx_fib_index;
- if (snat_static_mapping_match(sm, l_key, &e_key, 0, 0, 0))
+ if (snat_static_mapping_match(sm, l_key, &e_key, 0, 0, 0, &lb))
return 0;
u = nat_user_get_or_create (sm, &ip->src_address, rx_fib_index,
s->ext_host_addr.as_u32 = ip->dst_address.as_u32;
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->in2out = l_key;
s->out2in = e_key;
- u->nstaticsessions++;
+ s->out2in.protocol = l_key.protocol;
+ user_session_increment (sm, u, 1 /* static */);
/* Add to lookup tables */
s_kv.value = s - tsm->sessions;
ip->dst_address.as_u32 = s->ext_host_addr.as_u32;
}
tcp->checksum = ip_csum_fold(sum);
+ nat44_set_tcp_session_state (sm, s, tcp, thread_index);
}
else
{
}
else
{
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE(nat_not_translate_output_feature_fwd(sm, ip0, thread_index)))
+ goto trace00;
+ }
+
if (PREDICT_FALSE (proto0 == ~0 || proto0 == SNAT_PROTOCOL_ICMP))
{
next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
{
if (is_slow_path)
{
- if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0,
- ip0, proto0, rx_fib_index0, thread_index)) && !is_output_feature)
- goto trace00;
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE(nat_not_translate_output_feature(sm,
+ ip0, proto0, udp0->src_port, udp0->dst_port, thread_index, sw_if_index0)))
+ goto trace00;
+ }
+ else
+ {
+ if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0,
+ ip0, proto0, rx_fib_index0, thread_index)))
+ goto trace00;
+ }
next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
&s0, node, next0, thread_index);
ip4_header_t /* cheat */,
length /* changed member */);
tcp0->checksum = ip_csum_fold(sum0);
+ nat44_set_tcp_session_state (sm, s0, tcp0, thread_index);
}
else
{
}
else
{
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE(nat_not_translate_output_feature_fwd(sm, ip1, thread_index)))
+ goto trace01;
+ }
+
if (PREDICT_FALSE (proto1 == ~0 || proto1 == SNAT_PROTOCOL_ICMP))
{
next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
}
}
- b1->flags |= VNET_BUFFER_F_IS_NATED;
-
key1.addr = ip1->src_address;
key1.port = udp1->src_port;
key1.protocol = proto1;
{
if (is_slow_path)
{
- if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index1,
- ip1, proto1, rx_fib_index1, thread_index)) && !is_output_feature)
- goto trace01;
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE(nat_not_translate_output_feature(sm,
+ ip1, proto1, udp1->src_port, udp1->dst_port, thread_index, sw_if_index1)))
+ goto trace01;
+ }
+ else
+ {
+ if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index1,
+ ip1, proto1, rx_fib_index1, thread_index)))
+ goto trace01;
+ }
next1 = slow_path (sm, b1, ip1, rx_fib_index1, &key1,
&s1, node, next1, thread_index);
}
}
+ b1->flags |= VNET_BUFFER_F_IS_NATED;
+
old_addr1 = ip1->src_address.as_u32;
ip1->src_address = s1->out2in.addr;
new_addr1 = ip1->src_address.as_u32;
ip4_header_t /* cheat */,
length /* changed member */);
tcp1->checksum = ip_csum_fold(sum1);
+ nat44_set_tcp_session_state (sm, s1, tcp1, thread_index);
}
else
{
}
else
{
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE(nat_not_translate_output_feature_fwd(sm, ip0, thread_index)))
+ goto trace0;
+ }
+
if (PREDICT_FALSE (proto0 == ~0 || proto0 == SNAT_PROTOCOL_ICMP))
{
next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
{
if (is_slow_path)
{
- if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0,
- ip0, proto0, rx_fib_index0, thread_index)) && !is_output_feature)
- goto trace0;
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE(nat_not_translate_output_feature(sm,
+ ip0, proto0, udp0->src_port, udp0->dst_port, thread_index, sw_if_index0)))
+ goto trace0;
+ }
+ else
+ {
+ if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0,
+ ip0, proto0, rx_fib_index0, thread_index)))
+ goto trace0;
+ }
next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
&s0, node, next0, thread_index);
ip4_header_t /* cheat */,
length /* changed member */);
tcp0->checksum = ip_csum_fold(sum0);
+ nat44_set_tcp_session_state (sm, s0, tcp0, thread_index);
}
else
{
udp0 = ip4_next_header (ip0);
/* Check if destination is static mappings */
- if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0))
+ if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0))
{
new_dst_addr0 = sm0.addr.as_u32;
new_dst_port0 = sm0.port;
ip4_header_t /* cheat */,
length /* changed member */);
tcp0->checksum = ip_csum_fold(sum0);
+ nat44_set_tcp_session_state (sm, s0, tcp0, thread_index);
}
else
{
key0.port = udp0->src_port;
key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, key0, &sm0, 0, 0, 0))
+ if (snat_static_mapping_match(sm, key0, &sm0, 0, 0, 0, 0))
{
b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
next0= SNAT_IN2OUT_NEXT_DROP;
Code Review / vpp.git / blobdiff