#include <vppinfra/error.h>
#include <nat/nat.h>
#include <nat/nat_ipfix_logging.h>
-#include <nat/nat_reass.h>
#include <nat/nat_inlines.h>
#include <nat/nat44_inlines.h>
#include <nat/nat_syslog.h>
}
static void
-create_bypass_for_fwd (snat_main_t * sm, ip4_header_t * ip, u32 rx_fib_index,
- u32 thread_index)
+create_bypass_for_fwd (snat_main_t * sm, vlib_buffer_t * b, 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;
if (ip->protocol == IP_PROTOCOL_ICMP)
{
- if (get_icmp_o2i_ed_key (ip, &key))
+ if (get_icmp_o2i_ed_key (b, ip, &key))
return;
}
else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
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))
+ if (nat44_set_tcp_session_state_o2i
+ (sm, s, tcp->flags, tcp->ack_number, tcp->seq_number, thread_index))
return;
}
}
static inline void
-create_bypass_for_fwd_worker (snat_main_t * sm, ip4_header_t * ip,
- u32 rx_fib_index)
+create_bypass_for_fwd_worker (snat_main_t * sm, vlib_buffer_t * b,
+ ip4_header_t * ip, u32 rx_fib_index)
{
ip4_header_t ip_wkr = {
.src_address = ip->dst_address,
};
u32 thread_index = sm->worker_in2out_cb (&ip_wkr, rx_fib_index, 0);
- create_bypass_for_fwd (sm, ip, rx_fib_index, thread_index);
+ create_bypass_for_fwd (sm, b, ip, rx_fib_index, thread_index);
}
#ifndef CLIB_MARCH_VARIANT
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];
u8 dont_translate = 0, is_addr_only, identity_nat;
snat_session_key_t e_key, l_key;
- icmp = (icmp46_header_t *) ip4_next_header (ip);
sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
- if (get_icmp_o2i_ed_key (ip, &key))
+ if (get_icmp_o2i_ed_key (b, ip, &key))
{
b->error = node->errors[NAT_OUT2IN_ED_ERROR_UNSUPPORTED_PROTOCOL];
next = NAT_NEXT_DROP;
goto out;
}
if (sm->num_workers > 1)
- create_bypass_for_fwd_worker (sm, ip, rx_fib_index);
+ create_bypass_for_fwd_worker (sm, b, ip, rx_fib_index);
else
- create_bypass_for_fwd (sm, ip, rx_fib_index, thread_index);
+ create_bypass_for_fwd (sm, b, ip, rx_fib_index, thread_index);
goto out;
}
}
- if (PREDICT_FALSE (icmp->type != ICMP4_echo_reply &&
- (icmp->type != ICMP4_echo_request || !is_addr_only)))
+ if (PREDICT_FALSE
+ (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_reply
+ && (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_request || !is_addr_only)))
{
b->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE];
next = NAT_NEXT_DROP;
}
else
{
- if (PREDICT_FALSE (icmp->type != ICMP4_echo_reply &&
- icmp->type != ICMP4_echo_request &&
- !icmp_is_error_message (icmp)))
+ if (PREDICT_FALSE
+ (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_reply
+ && vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_request
+ && !icmp_type_is_error_message (vnet_buffer (b)->ip.
+ reass.icmp_type_or_tcp_flags)))
{
b->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE];
next = NAT_NEXT_DROP;
goto trace00;
}
- if (ip4_is_fragment (ip0))
- {
- next0 = NAT_NEXT_OUT2IN_ED_REASS;
- fragments++;
- goto trace00;
- }
-
if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
{
next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
}
make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address,
- ip0->protocol, rx_fib_index0, udp0->dst_port,
- udp0->src_port);
+ ip0->protocol, rx_fib_index0,
+ vnet_buffer (b0)->ip.reass.l4_dst_port,
+ vnet_buffer (b0)->ip.reass.l4_src_port);
if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0))
{
/* Try to match static mapping by external address and port,
destination address and port in packet */
e_key0.addr = ip0->dst_address;
- e_key0.port = udp0->dst_port;
+ e_key0.port = vnet_buffer (b0)->ip.reass.l4_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,
* 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))))
+ if (PREDICT_FALSE
+ (proto0 == SNAT_PROTOCOL_UDP
+ && (vnet_buffer (b0)->ip.reass.l4_dst_port ==
+ clib_host_to_net_u16
+ (UDP_DST_PORT_dhcp_to_client))))
{
goto trace00;
}
}
else
{
- if (next_src_nat (sm, ip0, ip0->protocol,
- udp0->src_port, udp0->dst_port,
- thread_index, rx_fib_index0))
+ if (next_src_nat
+ (sm, ip0, ip0->protocol,
+ vnet_buffer (b0)->ip.reass.l4_src_port,
+ vnet_buffer (b0)->ip.reass.l4_dst_port,
+ thread_index, rx_fib_index0))
{
next0 = NAT_NEXT_IN2OUT_ED_FAST_PATH;
goto trace00;
}
if (sm->num_workers > 1)
- create_bypass_for_fwd_worker (sm, ip0,
+ create_bypass_for_fwd_worker (sm, b0, ip0,
rx_fib_index0);
else
- create_bypass_for_fwd (sm, ip0, rx_fib_index0,
+ create_bypass_for_fwd (sm, b0, ip0, rx_fib_index0,
thread_index);
}
goto trace00;
if (PREDICT_FALSE (identity_nat0))
goto trace00;
- if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
+ if ((proto0 == SNAT_PROTOCOL_TCP)
+ && !tcp_flags_is_init (vnet_buffer (b0)->ip.
+ reass.icmp_type_or_tcp_flags))
{
b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
next0 = NAT_NEXT_DROP;
src_address);
ip0->checksum = ip_csum_fold (sum0);
- old_port0 = udp0->dst_port;
- new_port0 = udp0->dst_port = s0->in2out.port;
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
{
- 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))
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- 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;
+ new_port0 = udp0->dst_port = s0->in2out.port;
+ sum0 = tcp0->checksum;
+ sum0 =
+ ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ sum0 =
+ ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
+ length);
+ if (is_twice_nat_session (s0))
+ {
+ sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
+ s0->ext_host_nat_addr.as_u32,
+ ip4_header_t, dst_address);
+ sum0 =
+ ip_csum_update (sum0,
+ vnet_buffer (b0)->ip.
+ reass.l4_src_port,
+ s0->ext_host_nat_port, ip4_header_t,
+ length);
+ tcp0->src_port = s0->ext_host_nat_port;
+ ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
+ }
+ tcp0->checksum = ip_csum_fold (sum0);
}
- tcp0->checksum = ip_csum_fold (sum0);
tcp_packets++;
if (nat44_set_tcp_session_state_o2i
- (sm, s0, tcp0, thread_index))
+ (sm, s0, vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags,
+ vnet_buffer (b0)->ip.reass.tcp_ack_number,
+ vnet_buffer (b0)->ip.reass.tcp_seq_number, thread_index))
goto trace00;
}
- else if (udp0->checksum)
+ else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
+ && udp0->checksum)
{
+ new_port0 = udp0->dst_port = s0->in2out.port;
sum0 = udp0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
dst_address);
sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
s0->ext_host_nat_addr.as_u32,
ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, udp0->src_port,
- s0->ext_host_nat_port, ip4_header_t,
- length);
+ sum0 =
+ ip_csum_update (sum0,
+ vnet_buffer (b0)->ip.reass.l4_src_port,
+ s0->ext_host_nat_port, ip4_header_t,
+ length);
udp0->src_port = s0->ext_host_nat_port;
ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
}
}
else
{
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- udp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
+ new_port0 = udp0->dst_port = s0->in2out.port;
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ {
+ udp0->dst_port = s0->in2out.port;
+ if (is_twice_nat_session (s0))
+ {
+ udp0->src_port = s0->ext_host_nat_port;
+ ip0->src_address.as_u32 =
+ s0->ext_host_nat_addr.as_u32;
+ }
+ udp0->checksum = 0;
+ }
}
udp_packets++;
}
goto trace01;
}
- if (ip4_is_fragment (ip1))
- {
- next1 = NAT_NEXT_OUT2IN_ED_REASS;
- fragments++;
- goto trace01;
- }
-
if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
{
next1 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
}
make_ed_kv (&kv1, &ip1->dst_address, &ip1->src_address,
- ip1->protocol, rx_fib_index1, udp1->dst_port,
- udp1->src_port);
+ ip1->protocol, rx_fib_index1,
+ vnet_buffer (b1)->ip.reass.l4_dst_port,
+ vnet_buffer (b1)->ip.reass.l4_src_port);
if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv1, &value1))
{
/* 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.port = vnet_buffer (b1)->ip.reass.l4_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,
* 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))))
+ if (PREDICT_FALSE
+ (proto1 == SNAT_PROTOCOL_UDP
+ && (vnet_buffer (b1)->ip.reass.l4_dst_port ==
+ clib_host_to_net_u16
+ (UDP_DST_PORT_dhcp_to_client))))
{
goto trace01;
}
}
else
{
- if (next_src_nat (sm, ip1, ip1->protocol,
- udp1->src_port, udp1->dst_port,
- thread_index, rx_fib_index1))
+ if (next_src_nat
+ (sm, ip1, ip1->protocol,
+ vnet_buffer (b1)->ip.reass.l4_src_port,
+ vnet_buffer (b1)->ip.reass.l4_dst_port,
+ thread_index, rx_fib_index1))
{
next1 = NAT_NEXT_IN2OUT_ED_FAST_PATH;
goto trace01;
}
if (sm->num_workers > 1)
- create_bypass_for_fwd_worker (sm, ip1,
+ create_bypass_for_fwd_worker (sm, b1, ip1,
rx_fib_index1);
else
- create_bypass_for_fwd (sm, ip1, rx_fib_index1,
+ create_bypass_for_fwd (sm, b1, ip1, rx_fib_index1,
thread_index);
}
goto trace01;
if (PREDICT_FALSE (identity_nat1))
goto trace01;
- if ((proto1 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp1))
+ if ((proto1 == SNAT_PROTOCOL_TCP)
+ && !tcp_flags_is_init (vnet_buffer (b1)->ip.
+ reass.icmp_type_or_tcp_flags))
{
b1->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
next1 = NAT_NEXT_DROP;
src_address);
ip1->checksum = ip_csum_fold (sum1);
- old_port1 = udp1->dst_port;
- new_port1 = udp1->dst_port = s1->in2out.port;
+ old_port1 = vnet_buffer (b1)->ip.reass.l4_dst_port;
if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP))
{
- 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))
+ if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment)
{
- 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;
+ new_port1 = udp1->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,
+ vnet_buffer (b1)->ip.
+ reass.l4_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);
}
- tcp1->checksum = ip_csum_fold (sum1);
tcp_packets++;
if (nat44_set_tcp_session_state_o2i
- (sm, s1, tcp1, thread_index))
+ (sm, s1, vnet_buffer (b1)->ip.reass.icmp_type_or_tcp_flags,
+ vnet_buffer (b1)->ip.reass.tcp_ack_number,
+ vnet_buffer (b1)->ip.reass.tcp_seq_number, thread_index))
goto trace01;
}
- else if (udp1->checksum)
+ else if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment
+ && udp1->checksum)
{
+ new_port1 = udp1->dst_port = s1->in2out.port;
sum1 = udp1->checksum;
sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t,
dst_address);
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, udp1->src_port,
- s1->ext_host_nat_port, ip4_header_t,
- length);
+ sum1 =
+ ip_csum_update (sum1,
+ vnet_buffer (b1)->ip.reass.l4_src_port,
+ s1->ext_host_nat_port, ip4_header_t,
+ length);
udp1->src_port = s1->ext_host_nat_port;
ip1->src_address.as_u32 = s1->ext_host_nat_addr.as_u32;
}
}
else
{
- if (PREDICT_FALSE (is_twice_nat_session (s1)))
+ if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment)
{
- udp1->src_port = s1->ext_host_nat_port;
- ip1->src_address.as_u32 = s1->ext_host_nat_addr.as_u32;
+ if (PREDICT_FALSE (is_twice_nat_session (s1)))
+ {
+ udp1->dst_port = s1->in2out.port;
+ if (is_twice_nat_session (s1))
+ {
+ udp1->src_port = s1->ext_host_nat_port;
+ ip1->src_address.as_u32 =
+ s1->ext_host_nat_addr.as_u32;
+ }
+ udp1->checksum = 0;
+ }
}
udp_packets++;
}
goto trace0;
}
- if (ip4_is_fragment (ip0))
- {
- next0 = NAT_NEXT_OUT2IN_ED_REASS;
- fragments++;
- goto trace0;
- }
-
if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
{
next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
}
make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address,
- ip0->protocol, rx_fib_index0, udp0->dst_port,
- udp0->src_port);
+ ip0->protocol, rx_fib_index0,
+ vnet_buffer (b0)->ip.reass.l4_dst_port,
+ vnet_buffer (b0)->ip.reass.l4_src_port);
if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0))
{
/* Try to match static mapping by external address and port,
destination address and port in packet */
e_key0.addr = ip0->dst_address;
- e_key0.port = udp0->dst_port;
+ e_key0.port = vnet_buffer (b0)->ip.reass.l4_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,
* 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))))
+ if (PREDICT_FALSE
+ (proto0 == SNAT_PROTOCOL_UDP
+ && (vnet_buffer (b0)->ip.reass.l4_dst_port ==
+ clib_host_to_net_u16
+ (UDP_DST_PORT_dhcp_to_client))))
{
goto trace0;
}
}
else
{
- if (next_src_nat (sm, ip0, ip0->protocol,
- udp0->src_port, udp0->dst_port,
- thread_index, rx_fib_index0))
+ if (next_src_nat
+ (sm, ip0, ip0->protocol,
+ vnet_buffer (b0)->ip.reass.l4_src_port,
+ vnet_buffer (b0)->ip.reass.l4_dst_port,
+ thread_index, rx_fib_index0))
{
next0 = NAT_NEXT_IN2OUT_ED_FAST_PATH;
goto trace0;
}
if (sm->num_workers > 1)
- create_bypass_for_fwd_worker (sm, ip0,
+ create_bypass_for_fwd_worker (sm, b0, ip0,
rx_fib_index0);
else
- create_bypass_for_fwd (sm, ip0, rx_fib_index0,
+ create_bypass_for_fwd (sm, b0, ip0, rx_fib_index0,
thread_index);
}
goto trace0;
if (PREDICT_FALSE (identity_nat0))
goto trace0;
- if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
+ if ((proto0 == SNAT_PROTOCOL_TCP)
+ && !tcp_flags_is_init (vnet_buffer (b0)->ip.
+ reass.icmp_type_or_tcp_flags))
{
b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
next0 = NAT_NEXT_DROP;
src_address);
ip0->checksum = ip_csum_fold (sum0);
- old_port0 = udp0->dst_port;
- new_port0 = udp0->dst_port = s0->in2out.port;
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
{
- 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))
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- 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;
+ new_port0 = udp0->dst_port = s0->in2out.port;
+ sum0 = tcp0->checksum;
+ sum0 =
+ ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ sum0 =
+ ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
+ length);
+ if (is_twice_nat_session (s0))
+ {
+ sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
+ s0->ext_host_nat_addr.as_u32,
+ ip4_header_t, dst_address);
+ sum0 =
+ ip_csum_update (sum0,
+ vnet_buffer (b0)->ip.
+ reass.l4_src_port,
+ s0->ext_host_nat_port, ip4_header_t,
+ length);
+ tcp0->src_port = s0->ext_host_nat_port;
+ ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
+ }
+ tcp0->checksum = ip_csum_fold (sum0);
}
- tcp0->checksum = ip_csum_fold (sum0);
tcp_packets++;
if (nat44_set_tcp_session_state_o2i
- (sm, s0, tcp0, thread_index))
+ (sm, s0, vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags,
+ vnet_buffer (b0)->ip.reass.tcp_ack_number,
+ vnet_buffer (b0)->ip.reass.tcp_seq_number, thread_index))
goto trace0;
}
- else if (udp0->checksum)
+ else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
+ && udp0->checksum)
{
+ new_port0 = udp0->dst_port = s0->in2out.port;
sum0 = udp0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
dst_address);
sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
s0->ext_host_nat_addr.as_u32,
ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, udp0->src_port,
- s0->ext_host_nat_port, ip4_header_t,
- length);
+ sum0 =
+ ip_csum_update (sum0,
+ vnet_buffer (b0)->ip.reass.l4_src_port,
+ s0->ext_host_nat_port, ip4_header_t,
+ length);
udp0->src_port = s0->ext_host_nat_port;
ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
}
}
else
{
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- udp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
+ new_port0 = udp0->dst_port = s0->in2out.port;
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ {
+ udp0->src_port = s0->ext_host_nat_port;
+ ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
+ }
}
udp_packets++;
}
return frame->n_vectors;
}
-static inline uword
-nat44_ed_out2in_reass_node_fn_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- u32 n_left_from, *from, *to_next;
- nat_next_t next_index;
- u32 pkts_processed = 0;
- snat_main_t *sm = &snat_main;
- f64 now = vlib_time_now (vm);
- u32 thread_index = vm->thread_index;
- snat_main_per_thread_data_t *per_thread_data =
- &sm->per_thread_data[thread_index];
- u32 *fragments_to_drop = 0;
- u32 *fragments_to_loopback = 0;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0;
- vlib_buffer_t *b0;
- u32 next0;
- u8 cached0 = 0;
- ip4_header_t *ip0;
- nat_reass_ip4_t *reass0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- icmp46_header_t *icmp0;
- clib_bihash_kv_16_8_t kv0, value0;
- snat_session_t *s0 = 0;
- u16 old_port0, new_port0;
- ip_csum_t sum0;
- snat_session_key_t e_key0, l_key0;
- lb_nat_type_t lb0;
- twice_nat_type_t twice_nat0;
- u8 identity_nat0;
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- next0 = nat_buffer_opaque (b0)->arc_next;
-
- 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 = NAT_NEXT_DROP;
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_DROP_FRAGMENT];
- goto trace0;
- }
-
- ip0 = (ip4_header_t *) vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
- ip0->dst_address,
- ip0->fragment_id,
- ip0->protocol,
- 1, &fragments_to_drop);
-
- if (PREDICT_FALSE (!reass0))
- {
- next0 = NAT_NEXT_DROP;
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_REASS];
- nat_elog_notice ("maximum reassemblies exceeded");
- goto trace0;
- }
-
- if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
- {
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_out2in_ed_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
-
- if (PREDICT_TRUE (next0 != NAT_NEXT_DROP))
- {
- if (s0)
- reass0->sess_index = s0 - per_thread_data->sessions;
- else
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- reass0->thread_index = thread_index;
- nat_ip4_reass_get_frags (reass0,
- &fragments_to_loopback);
- }
-
- goto trace0;
- }
-
- make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address,
- ip0->protocol, rx_fib_index0, udp0->dst_port,
- udp0->src_port);
-
- if (clib_bihash_search_16_8
- (&per_thread_data->out2in_ed, &kv0, &value0))
- {
- /* Try to match static mapping by external address and port,
- destination address and port in packet */
- e_key0.addr = ip0->dst_address;
- e_key0.port = udp0->dst_port;
- e_key0.protocol = proto0;
- e_key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match (sm, e_key0, &l_key0, 1, 0,
- &twice_nat0, &lb0, 0,
- &identity_nat0))
- {
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP
- && (udp0->dst_port
- ==
- clib_host_to_net_u16
- (UDP_DST_PORT_dhcp_to_client))))
- {
- goto trace0;
- }
-
- if (!sm->forwarding_enabled)
- {
- b0->error =
- node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next0 = NAT_NEXT_DROP;
- }
- else
- {
- if (next_src_nat (sm, ip0, ip0->protocol,
- udp0->src_port, udp0->dst_port,
- thread_index, rx_fib_index0))
- {
- next0 = NAT_NEXT_IN2OUT_ED_FAST_PATH;
- goto trace0;
- }
- if (sm->num_workers > 1)
- create_bypass_for_fwd_worker (sm, ip0,
- rx_fib_index0);
- else
- create_bypass_for_fwd (sm, ip0, rx_fib_index0,
- thread_index);
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- nat_ip4_reass_get_frags (reass0,
- &fragments_to_loopback);
- }
- goto trace0;
- }
-
- if (PREDICT_FALSE (identity_nat0))
- {
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- goto trace0;
- }
-
- if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0))
- {
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN];
- next0 = NAT_NEXT_DROP;
- goto trace0;
- }
-
- /* Create session initiated by host from external network */
- s0 = create_session_for_static_mapping_ed (sm, b0, l_key0,
- e_key0, node,
- thread_index,
- twice_nat0, lb0,
- now);
- if (!s0)
- {
- b0->error =
- node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
- next0 = NAT_NEXT_DROP;
- goto trace0;
- }
- reass0->sess_index = s0 - per_thread_data->sessions;
- reass0->thread_index = thread_index;
- }
- else
- {
- s0 = pool_elt_at_index (per_thread_data->sessions,
- value0.value);
- reass0->sess_index = value0.value;
- }
- nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
- }
- else
- {
- if (reass0->flags & NAT_REASS_FLAG_ED_DONT_TRANSLATE)
- goto trace0;
- if (PREDICT_FALSE (reass0->sess_index == (u32) ~ 0))
- {
- if (nat_ip4_reass_add_fragment
- (thread_index, reass0, bi0, &fragments_to_drop))
- {
- b0->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_FRAG];
- nat_elog_notice
- ("maximum fragments per reassembly exceeded");
- next0 = NAT_NEXT_DROP;
- goto trace0;
- }
- cached0 = 1;
- goto trace0;
- }
- s0 = pool_elt_at_index (per_thread_data->sessions,
- reass0->sess_index);
- }
-
- old_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address = s0->in2out.addr;
- new_addr0 = ip0->dst_address.as_u32;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */ );
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32, ip4_header_t,
- src_address);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
- {
- old_port0 = udp0->dst_port;
- new_port0 = udp0->dst_port = s0->in2out.port;
-
- if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
- {
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */ );
-
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
- if (is_twice_nat_session (s0))
- {
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, tcp0->src_port,
- s0->ext_host_nat_port,
- ip4_header_t, length);
- tcp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
- }
- tcp0->checksum = ip_csum_fold (sum0);
- }
- else if (udp0->checksum)
- {
- sum0 = udp0->checksum;
- sum0 =
- ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- sum0 =
- ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, udp0->src_port,
- s0->ext_host_nat_port,
- ip4_header_t, length);
- udp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
- }
- udp0->checksum = ip_csum_fold (sum0);
- }
- else
- {
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- udp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
- }
- }
- }
-
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0),
- thread_index);
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
-
- trace0:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat44_reass_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->cached = cached0;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- }
-
- if (cached0)
- {
- n_left_to_next++;
- to_next--;
- }
- else
- {
- pkts_processed += next0 != NAT_NEXT_DROP;
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- if (n_left_from == 0 && vec_len (fragments_to_loopback))
- {
- from = vlib_frame_vector_args (frame);
- u32 len = vec_len (fragments_to_loopback);
- if (len <= VLIB_FRAME_SIZE)
- {
- clib_memcpy_fast (from, fragments_to_loopback,
- sizeof (u32) * len);
- n_left_from = len;
- vec_reset_length (fragments_to_loopback);
- }
- else
- {
- clib_memcpy_fast (from, fragments_to_loopback +
- (len - VLIB_FRAME_SIZE),
- sizeof (u32) * VLIB_FRAME_SIZE);
- n_left_from = VLIB_FRAME_SIZE;
- _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
- }
- }
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_node_increment_counter (vm, sm->ed_out2in_reass_node_index,
- NAT_OUT2IN_ED_ERROR_OUT2IN_PACKETS,
- pkts_processed);
-
- nat_send_all_to_node (vm, fragments_to_drop, node,
- &node->errors[NAT_OUT2IN_ED_ERROR_DROP_FRAGMENT],
- NAT_NEXT_DROP);
-
- vec_free (fragments_to_drop);
- vec_free (fragments_to_loopback);
- return frame->n_vectors;
-}
-
VLIB_NODE_FN (nat44_ed_out2in_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
};
/* *INDENT-ON* */
-VLIB_NODE_FN (nat44_ed_out2in_reass_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return nat44_ed_out2in_reass_node_fn_inline (vm, node, frame);
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (nat44_ed_out2in_reass_node) = {
- .name = "nat44-ed-out2in-reass",
- .vector_size = sizeof (u32),
- .sibling_of = "nat-default",
- .format_trace = format_nat44_reass_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN(nat_out2in_ed_error_strings),
- .error_strings = nat_out2in_ed_error_strings,
-};
-/* *INDENT-ON* */
-
static u8 *
format_nat_pre_trace (u8 * s, va_list * args)
{
Code Review / vpp.git / blobdiff