#include <vnet/udp/udp.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>
_(NO_TRANSLATION, "no translation") \
_(MAX_SESSIONS_EXCEEDED, "maximum sessions exceeded") \
_(DROP_FRAGMENT, "drop fragment") \
-_(MAX_REASS, "maximum reassemblies exceeded") \
-_(MAX_FRAG, "maximum fragments per reassembly exceeded")\
_(TCP_PACKETS, "TCP packets") \
_(UDP_PACKETS, "UDP packets") \
_(ICMP_PACKETS, "ICMP packets") \
SNAT_IN2OUT_NEXT_DROP,
SNAT_IN2OUT_NEXT_ICMP_ERROR,
SNAT_IN2OUT_NEXT_SLOW_PATH,
- SNAT_IN2OUT_NEXT_REASS,
SNAT_IN2OUT_N_NEXT,
} snat_in2out_next_t;
snat_session_t *s = 0;
clib_bihash_kv_8_8_t kv0;
snat_session_key_t key1;
- udp_header_t *udp0 = ip4_next_header (ip0);
u8 is_sm = 0;
nat_outside_fib_t *outside_fib;
fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
break;
}
s->ext_host_addr.as_u32 = ip0->dst_address.as_u32;
- s->ext_host_port = udp0->dst_port;
+ s->ext_host_port = vnet_buffer (b0)->ip.reass.l4_dst_port;
*sessionp = s;
/* Add to translation hashes */
#ifndef CLIB_MARCH_VARIANT
static_always_inline
- snat_in2out_error_t icmp_get_key (ip4_header_t * ip0,
+ snat_in2out_error_t icmp_get_key (vlib_buffer_t * b, ip4_header_t * ip0,
snat_session_key_t * p_key0)
{
icmp46_header_t *icmp0;
icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
echo0 = (icmp_echo_header_t *) (icmp0 + 1);
- if (!icmp_is_error_message (icmp0))
+ if (!icmp_type_is_error_message
+ (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags))
{
key0.protocol = SNAT_PROTOCOL_ICMP;
key0.addr = ip0->src_address;
- key0.port = echo0->identifier;
+ key0.port = vnet_buffer (b)->ip.reass.l4_src_port; // TODO fixme should this be dst port?
}
else
{
snat_session_key_t * p_value,
u8 * p_dont_translate, void *d, void *e)
{
- icmp46_header_t *icmp0;
u32 sw_if_index0;
u32 rx_fib_index0;
snat_session_key_t key0;
u32 next0 = ~0;
int err;
- icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
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);
- err = icmp_get_key (ip0, &key0);
+ err = icmp_get_key (b0, ip0, &key0);
if (err != -1)
{
b0->error = node->errors[err];
}
}
- if (PREDICT_FALSE (icmp_is_error_message (icmp0)))
+ if (PREDICT_FALSE
+ (icmp_type_is_error_message
+ (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags)))
{
b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
next0 = SNAT_IN2OUT_NEXT_DROP;
}
else
{
- if (PREDICT_FALSE (icmp0->type != ICMP4_echo_request &&
- icmp0->type != ICMP4_echo_reply &&
- !icmp_is_error_message (icmp0)))
+ if (PREDICT_FALSE
+ (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_request
+ && vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_reply
+ && !icmp_type_is_error_message (vnet_buffer (b0)->ip.
+ reass.icmp_type_or_tcp_flags)))
{
b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
next0 = SNAT_IN2OUT_NEXT_DROP;
snat_session_key_t * p_value,
u8 * p_dont_translate, void *d, void *e)
{
- icmp46_header_t *icmp0;
u32 sw_if_index0;
u32 rx_fib_index0;
snat_session_key_t key0;
u32 next0 = ~0;
int err;
- icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
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);
- err = icmp_get_key (ip0, &key0);
+ err = icmp_get_key (b0, ip0, &key0);
if (err != -1)
{
b0->error = node->errors[err];
goto out;
}
- if (icmp_is_error_message (icmp0))
+ if (icmp_type_is_error_message
+ (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags))
{
next0 = SNAT_IN2OUT_NEXT_DROP;
goto out;
goto out;
}
- if (PREDICT_FALSE (icmp0->type != ICMP4_echo_request &&
- (icmp0->type != ICMP4_echo_reply || !is_addr_only) &&
- !icmp_is_error_message (icmp0)))
+ if (PREDICT_FALSE
+ (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags != ICMP4_echo_request
+ && (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_reply || !is_addr_only)
+ && !icmp_type_is_error_message (vnet_buffer (b0)->ip.
+ reass.icmp_type_or_tcp_flags)))
{
b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
next0 = SNAT_IN2OUT_NEXT_DROP;
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;
- if (PREDICT_FALSE (new_id0 != echo0->identifier))
- {
- old_id0 = echo0->identifier;
- new_id0 = sm0.port;
- echo0->identifier = new_id0;
-
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
- identifier);
- icmp0->checksum = ip_csum_fold (sum0);
- }
- }
- else
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- inner_ip0 = (ip4_header_t *) (echo0 + 1);
- l4_header = ip4_next_header (inner_ip0);
+ if (icmp0->checksum == 0)
+ icmp0->checksum = 0xffff;
- if (!ip4_header_checksum_is_valid (inner_ip0))
+ if (!icmp_type_is_error_message (icmp0->type))
{
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
+ new_id0 = sm0.port;
+ if (PREDICT_FALSE (new_id0 != echo0->identifier))
+ {
+ old_id0 = echo0->identifier;
+ new_id0 = sm0.port;
+ echo0->identifier = new_id0;
+
+ sum0 = icmp0->checksum;
+ sum0 =
+ ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
+ identifier);
+ icmp0->checksum = ip_csum_fold (sum0);
+ }
}
-
- /* update inner destination IP address */
- old_addr0 = inner_ip0->dst_address.as_u32;
- inner_ip0->dst_address = sm0.addr;
- new_addr0 = inner_ip0->dst_address.as_u32;
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address /* changed member */ );
- icmp0->checksum = ip_csum_fold (sum0);
-
- /* update inner IP header checksum */
- old_checksum0 = inner_ip0->checksum;
- sum0 = inner_ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address /* changed member */ );
- inner_ip0->checksum = ip_csum_fold (sum0);
- new_checksum0 = inner_ip0->checksum;
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_checksum0, new_checksum0, ip4_header_t,
- checksum);
- icmp0->checksum = ip_csum_fold (sum0);
-
- switch (protocol)
+ else
{
- case SNAT_PROTOCOL_ICMP:
- inner_icmp0 = (icmp46_header_t *) l4_header;
- inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
+ inner_ip0 = (ip4_header_t *) (echo0 + 1);
+ l4_header = ip4_next_header (inner_ip0);
- old_id0 = inner_echo0->identifier;
- new_id0 = sm0.port;
- inner_echo0->identifier = new_id0;
+ if (!ip4_header_checksum_is_valid (inner_ip0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
+ /* update inner destination IP address */
+ old_addr0 = inner_ip0->dst_address.as_u32;
+ inner_ip0->dst_address = sm0.addr;
+ new_addr0 = inner_ip0->dst_address.as_u32;
sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
- identifier);
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address /* changed member */ );
icmp0->checksum = ip_csum_fold (sum0);
- break;
- case SNAT_PROTOCOL_UDP:
- case SNAT_PROTOCOL_TCP:
- old_id0 = ((tcp_udp_header_t *) l4_header)->dst_port;
- new_id0 = sm0.port;
- ((tcp_udp_header_t *) l4_header)->dst_port = new_id0;
+ /* update inner IP header checksum */
+ old_checksum0 = inner_ip0->checksum;
+ sum0 = inner_ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address /* changed member */ );
+ inner_ip0->checksum = ip_csum_fold (sum0);
+ new_checksum0 = inner_ip0->checksum;
sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_id0, new_id0, tcp_udp_header_t,
- dst_port);
+ sum0 =
+ ip_csum_update (sum0, old_checksum0, new_checksum0, ip4_header_t,
+ checksum);
icmp0->checksum = ip_csum_fold (sum0);
- break;
- default:
- ASSERT (0);
+
+ switch (protocol)
+ {
+ case SNAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t *) l4_header;
+ inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
+
+ old_id0 = inner_echo0->identifier;
+ new_id0 = sm0.port;
+ inner_echo0->identifier = new_id0;
+
+ sum0 = icmp0->checksum;
+ sum0 =
+ ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
+ identifier);
+ icmp0->checksum = ip_csum_fold (sum0);
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ old_id0 = ((tcp_udp_header_t *) l4_header)->dst_port;
+ new_id0 = sm0.port;
+ ((tcp_udp_header_t *) l4_header)->dst_port = new_id0;
+
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_id0, new_id0, tcp_udp_header_t,
+ dst_port);
+ icmp0->checksum = ip_csum_fold (sum0);
+ break;
+ default:
+ ASSERT (0);
+ }
}
}
b1 = vlib_get_buffer (vm, bi1);
if (is_output_feature)
- iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
+ iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
iph_offset0);
goto trace00;
}
- if (ip4_is_fragment (ip0))
- {
- next0 = SNAT_IN2OUT_NEXT_REASS;
- fragments++;
- goto trace00;
- }
-
if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
{
next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
}
key0.addr = ip0->src_address;
- key0.port = udp0->src_port;
+ key0.port = vnet_buffer (b0)->ip.reass.l4_src_port;
key0.protocol = proto0;
key0.fib_index = rx_fib_index0;
{
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)))
+ if (PREDICT_FALSE
+ (nat_not_translate_output_feature
+ (sm, ip0, proto0,
+ vnet_buffer (b0)->ip.reass.l4_src_port,
+ vnet_buffer (b0)->ip.reass.l4_dst_port,
+ thread_index, sw_if_index0)))
goto trace00;
/*
if (PREDICT_FALSE
((b0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)
&& proto0 == SNAT_PROTOCOL_UDP
- && (udp0->dst_port ==
+ && (vnet_buffer (b0)->ip.reass.l4_dst_port ==
clib_host_to_net_u16
(UDP_DST_PORT_dhcp_to_server))))
goto trace00;
src_address /* changed member */ );
ip0->checksum = ip_csum_fold (sum0);
- old_port0 = udp0->src_port;
- new_port0 = udp0->src_port = s0->out2in.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 */ );
- mss_clamping (sm, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold (sum0);
- tcp_packets++;
- }
- else
- {
- if (PREDICT_FALSE (udp0->checksum))
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- sum0 = udp0->checksum;
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
+ new_port0 = udp0->src_port = s0->out2in.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 */ );
- udp0->checksum = ip_csum_fold (sum0);
+ mss_clamping (sm, tcp0, &sum0);
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ tcp_packets++;
+ }
+ else
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
+ {
+ if (PREDICT_FALSE (udp0->checksum))
+ {
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
+ new_port0 = udp0->src_port = s0->out2in.port;
+ sum0 = udp0->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 */ );
+ udp0->checksum = ip_csum_fold (sum0);
+ }
}
udp_packets++;
}
pkts_processed += next0 == SNAT_IN2OUT_NEXT_LOOKUP;
if (is_output_feature)
- iph_offset1 = vnet_buffer (b1)->ip.save_rewrite_length;
+ iph_offset1 = vnet_buffer (b1)->ip.reass.save_rewrite_length;
ip1 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b1) +
iph_offset1);
goto trace01;
}
- if (ip4_is_fragment (ip1))
- {
- next1 = SNAT_IN2OUT_NEXT_REASS;
- fragments++;
- goto trace01;
- }
-
if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
{
next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
}
key1.addr = ip1->src_address;
- key1.port = udp1->src_port;
+ key1.port = vnet_buffer (b1)->ip.reass.l4_src_port;
key1.protocol = proto1;
key1.fib_index = rx_fib_index1;
{
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)))
+ if (PREDICT_FALSE
+ (nat_not_translate_output_feature
+ (sm, ip1, proto1,
+ vnet_buffer (b1)->ip.reass.l4_src_port,
+ vnet_buffer (b1)->ip.reass.l4_dst_port,
+ thread_index, sw_if_index1)))
goto trace01;
/*
if (PREDICT_FALSE
((b1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)
&& proto1 == SNAT_PROTOCOL_UDP
- && (udp1->dst_port ==
+ && (vnet_buffer (b1)->ip.reass.l4_dst_port ==
clib_host_to_net_u16
(UDP_DST_PORT_dhcp_to_server))))
goto trace01;
src_address /* changed member */ );
ip1->checksum = ip_csum_fold (sum1);
- old_port1 = udp1->src_port;
- new_port1 = udp1->src_port = s1->out2in.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 /* changed member */ );
- sum1 = ip_csum_update (sum1, old_port1, new_port1,
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
- mss_clamping (sm, tcp1, &sum1);
- tcp1->checksum = ip_csum_fold (sum1);
- tcp_packets++;
- }
- else
- {
- if (PREDICT_FALSE (udp1->checksum))
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- sum1 = udp1->checksum;
+ old_port1 = vnet_buffer (b1)->ip.reass.l4_src_port;
+ new_port1 = udp1->src_port = s1->out2in.port;
+ sum1 = tcp1->checksum;
sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
ip4_header_t,
dst_address /* changed member */ );
sum1 = ip_csum_update (sum1, old_port1, new_port1,
ip4_header_t /* cheat */ ,
length /* changed member */ );
- udp1->checksum = ip_csum_fold (sum1);
+ mss_clamping (sm, tcp1, &sum1);
+ tcp1->checksum = ip_csum_fold (sum1);
+ }
+ tcp_packets++;
+ }
+ else
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
+ {
+ if (PREDICT_FALSE (udp1->checksum))
+ {
+ old_port1 = vnet_buffer (b1)->ip.reass.l4_src_port;
+ new_port1 = udp1->src_port = s1->out2in.port;
+ sum1 = udp1->checksum;
+ sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t, dst_address /* changed member */
+ );
+ sum1 =
+ ip_csum_update (sum1, old_port1, new_port1,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ udp1->checksum = ip_csum_fold (sum1);
+ }
}
udp_packets++;
}
next0 = SNAT_IN2OUT_NEXT_LOOKUP;
if (is_output_feature)
- iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
+ iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
iph_offset0);
goto trace0;
}
- if (ip4_is_fragment (ip0))
- {
- next0 = SNAT_IN2OUT_NEXT_REASS;
- fragments++;
- goto trace0;
- }
-
if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
{
next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
}
key0.addr = ip0->src_address;
- key0.port = udp0->src_port;
+ key0.port = vnet_buffer (b0)->ip.reass.l4_src_port;
key0.protocol = proto0;
key0.fib_index = rx_fib_index0;
{
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)))
+ if (PREDICT_FALSE
+ (nat_not_translate_output_feature
+ (sm, ip0, proto0,
+ vnet_buffer (b0)->ip.reass.l4_src_port,
+ vnet_buffer (b0)->ip.reass.l4_dst_port,
+ thread_index, sw_if_index0)))
goto trace0;
/*
if (PREDICT_FALSE
((b0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED)
&& proto0 == SNAT_PROTOCOL_UDP
- && (udp0->dst_port ==
+ && (vnet_buffer (b0)->ip.reass.l4_dst_port ==
clib_host_to_net_u16
(UDP_DST_PORT_dhcp_to_server))))
goto trace0;
src_address /* changed member */ );
ip0->checksum = ip_csum_fold (sum0);
- old_port0 = udp0->src_port;
- new_port0 = udp0->src_port = s0->out2in.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 */ );
- mss_clamping (sm, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold (sum0);
- tcp_packets++;
- }
- else
- {
- if (PREDICT_FALSE (udp0->checksum))
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- sum0 = udp0->checksum;
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
+ new_port0 = udp0->src_port = s0->out2in.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 */ );
- udp0->checksum = ip_csum_fold (sum0);
+ mss_clamping (sm, tcp0, &sum0);
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ tcp_packets++;
+ }
+ else
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
+ {
+ if (PREDICT_FALSE (udp0->checksum))
+ {
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
+ new_port0 = udp0->src_port = s0->out2in.port;
+ sum0 = udp0->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 */ );
+ udp0->checksum = ip_csum_fold (sum0);
+ }
}
udp_packets++;
}
[SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
[SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
[SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
},
};
/* *INDENT-ON* */
[SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output",
[SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-output-slowpath",
[SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
},
};
/* *INDENT-ON* */
[SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
[SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
[SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
},
};
/* *INDENT-ON* */
[SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output",
[SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-output-slowpath",
[SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
- },
-};
-/* *INDENT-ON* */
-
-VLIB_NODE_FN (nat44_in2out_reass_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- u32 n_left_from, *from, *to_next;
- snat_in2out_next_t next_index;
- u32 pkts_processed = 0, cached_fragments = 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;
- snat_session_key_t key0;
- 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_IN2OUT_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_IN2OUT_NEXT_DROP;
- b0->error = node->errors[SNAT_IN2OUT_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 = SNAT_IN2OUT_NEXT_DROP;
- b0->error = node->errors[SNAT_IN2OUT_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_in2out_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
-
- if (PREDICT_TRUE (next0 != SNAT_IN2OUT_NEXT_DROP))
- {
- if (s0)
- reass0->sess_index = s0 - per_thread_data->sessions;
- else
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- nat_ip4_reass_get_frags (reass0,
- &fragments_to_loopback);
- }
-
- goto trace0;
- }
-
- key0.addr = ip0->src_address;
- key0.port = udp0->src_port;
- key0.protocol = proto0;
- key0.fib_index = rx_fib_index0;
- kv0.key = key0.as_u64;
-
- if (clib_bihash_search_8_8
- (&per_thread_data->in2out, &kv0, &value0))
- {
- 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, now);
-
- if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
- goto trace0;
-
- if (PREDICT_FALSE (!s0))
- goto trace0;
-
- reass0->sess_index = s0 - per_thread_data->sessions;
- }
- 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
- (thread_index, reass0, bi0, &fragments_to_drop))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_FRAG];
- nat_elog_notice
- ("maximum fragments per reassembly exceeded");
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto trace0;
- }
- cached0 = 1;
- goto trace0;
- }
- s0 = pool_elt_at_index (per_thread_data->sessions,
- reass0->sess_index);
- }
-
- old_addr0 = ip0->src_address.as_u32;
- ip0->src_address = s0->out2in.addr;
- new_addr0 = ip0->src_address.as_u32;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- src_address /* changed member */ );
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
- {
- old_port0 = udp0->src_port;
- new_port0 = udp0->src_port = s0->out2in.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 */ );
- tcp0->checksum = ip_csum_fold (sum0);
- }
- else if (PREDICT_FALSE (udp0->checksum))
- {
- sum0 = udp0->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 */ );
- udp0->checksum = ip_csum_fold (sum0);
- }
- }
-
- /* Hairpinning */
- nat44_reass_hairpinning (sm, b0, ip0, s0->out2in.port,
- s0->ext_host_port, proto0, 0);
-
- /* 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--;
- cached_fragments++;
- }
- else
- {
- pkts_processed += next0 != SNAT_IN2OUT_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->in2out_reass_node_index,
- SNAT_IN2OUT_ERROR_PROCESSED_FRAGMENTS,
- pkts_processed);
- vlib_node_increment_counter (vm, sm->in2out_reass_node_index,
- SNAT_IN2OUT_ERROR_CACHED_FRAGMENTS,
- cached_fragments);
-
- nat_send_all_to_node (vm, fragments_to_drop, node,
- &node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT],
- SNAT_IN2OUT_NEXT_DROP);
-
- vec_free (fragments_to_drop);
- vec_free (fragments_to_loopback);
- return frame->n_vectors;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (nat44_in2out_reass_node) = {
- .name = "nat44-in2out-reass",
- .vector_size = sizeof (u32),
- .format_trace = format_nat44_reass_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .n_next_nodes = SNAT_IN2OUT_N_NEXT,
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
- [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
},
};
/* *INDENT-ON* */
[SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
[SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
[SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
},
};
/* *INDENT-ON* */
Code Review / vpp.git / blobdiff