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authorVladimir Kropylev <vladimir.kropylev@enea.com>2019-07-16 21:22:29 +0300
committerFlorin Coras <florin.coras@gmail.com>2019-07-17 20:35:42 +0000
commit456d2f9c29ddbfa71e592f7d00cc4c89696f7b0a (patch)
treedecabd7d37f8a4e9de163bbded53cd1c2b7488bc /src/vnet/tcp
parentf9a46854ac99301b97a9e1843e2153578a930a98 (diff)
tcp: add node with no 6-tuple lookup
Type: feature Add new node in TCP stack where TCP 6 tuple lookup is not required. In new node, packet metadata contains connection-index which can be used to retrieve the TCP connection. The new node will be used by proxy. Change-Id: I3aa0268946898912f4176d5c8c5903e06657479d Signed-off-by: Vladimir Kropylev <vladimir.kropylev@enea.com>
Diffstat (limited to 'src/vnet/tcp')
-rwxr-xr-x[-rw-r--r--]src/vnet/tcp/tcp_input.c118
1 files changed, 96 insertions, 22 deletions
diff --git a/src/vnet/tcp/tcp_input.c b/src/vnet/tcp/tcp_input.c
index 04139677a7b..6be6c3a081c 100644..100755
--- a/src/vnet/tcp/tcp_input.c
+++ b/src/vnet/tcp/tcp_input.c
@@ -3364,9 +3364,9 @@ tcp_input_set_error_next (tcp_main_t * tm, u16 * next, u32 * error, u8 is_ip4)
}
}
-static inline tcp_connection_t *
+always_inline tcp_connection_t *
tcp_input_lookup_buffer (vlib_buffer_t * b, u8 thread_index, u32 * error,
- u8 is_ip4)
+ u8 is_ip4, u8 is_nolookup)
{
u32 fib_index = vnet_buffer (b)->ip.fib_index;
int n_advance_bytes, n_data_bytes;
@@ -3395,10 +3395,12 @@ tcp_input_lookup_buffer (vlib_buffer_t * b, u8 thread_index, u32 * error,
return 0;
}
- tc = session_lookup_connection_wt4 (fib_index, &ip4->dst_address,
- &ip4->src_address, tcp->dst_port,
- tcp->src_port, TRANSPORT_PROTO_TCP,
- thread_index, &result);
+ if (!is_nolookup)
+ tc = session_lookup_connection_wt4 (fib_index, &ip4->dst_address,
+ &ip4->src_address, tcp->dst_port,
+ tcp->src_port,
+ TRANSPORT_PROTO_TCP, thread_index,
+ &result);
}
else
{
@@ -3420,20 +3422,31 @@ tcp_input_lookup_buffer (vlib_buffer_t * b, u8 thread_index, u32 * error,
*error = TCP_ERROR_LENGTH;
return 0;
}
- if (PREDICT_FALSE
- (ip6_address_is_link_local_unicast (&ip6->dst_address)))
+
+ if (!is_nolookup)
{
- ip4_main_t *im = &ip4_main;
- fib_index = vec_elt (im->fib_index_by_sw_if_index,
- vnet_buffer (b)->sw_if_index[VLIB_RX]);
- }
+ if (PREDICT_FALSE
+ (ip6_address_is_link_local_unicast (&ip6->dst_address)))
+ {
+ ip4_main_t *im = &ip4_main;
+ fib_index = vec_elt (im->fib_index_by_sw_if_index,
+ vnet_buffer (b)->sw_if_index[VLIB_RX]);
+ }
- tc = session_lookup_connection_wt6 (fib_index, &ip6->dst_address,
- &ip6->src_address, tcp->dst_port,
- tcp->src_port, TRANSPORT_PROTO_TCP,
- thread_index, &result);
+ tc = session_lookup_connection_wt6 (fib_index, &ip6->dst_address,
+ &ip6->src_address,
+ tcp->dst_port, tcp->src_port,
+ TRANSPORT_PROTO_TCP,
+ thread_index, &result);
+ }
}
+ if (is_nolookup)
+ tc =
+ (transport_connection_t *) tcp_connection_get (vnet_buffer (b)->
+ tcp.connection_index,
+ thread_index);
+
vnet_buffer (b)->tcp.seq_number = clib_net_to_host_u32 (tcp->seq_number);
vnet_buffer (b)->tcp.ack_number = clib_net_to_host_u32 (tcp->ack_number);
vnet_buffer (b)->tcp.data_offset = n_advance_bytes;
@@ -3475,7 +3488,7 @@ tcp_input_dispatch_buffer (tcp_main_t * tm, tcp_connection_t * tc,
always_inline uword
tcp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * frame, int is_ip4)
+ vlib_frame_t * frame, int is_ip4, u8 is_nolookup)
{
u32 n_left_from, *from, thread_index = vm->thread_index;
tcp_main_t *tm = vnet_get_tcp_main ();
@@ -3506,8 +3519,10 @@ tcp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
next[0] = next[1] = TCP_INPUT_NEXT_DROP;
- tc0 = tcp_input_lookup_buffer (b[0], thread_index, &error0, is_ip4);
- tc1 = tcp_input_lookup_buffer (b[1], thread_index, &error1, is_ip4);
+ tc0 = tcp_input_lookup_buffer (b[0], thread_index, &error0, is_ip4,
+ is_nolookup);
+ tc1 = tcp_input_lookup_buffer (b[1], thread_index, &error1, is_ip4,
+ is_nolookup);
if (PREDICT_TRUE (!tc0 + !tc1 == 0))
{
@@ -3557,7 +3572,8 @@ tcp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
}
next[0] = TCP_INPUT_NEXT_DROP;
- tc0 = tcp_input_lookup_buffer (b[0], thread_index, &error0, is_ip4);
+ tc0 = tcp_input_lookup_buffer (b[0], thread_index, &error0, is_ip4,
+ is_nolookup);
if (PREDICT_TRUE (tc0 != 0))
{
ASSERT (tcp_lookup_is_valid (tc0, tcp_buffer_hdr (b[0])));
@@ -3579,16 +3595,74 @@ tcp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
return frame->n_vectors;
}
+VLIB_NODE_FN (tcp4_input_nolookup_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return tcp46_input_inline (vm, node, from_frame, 1 /* is_ip4 */ ,
+ 1 /* is_nolookup */ );
+}
+
+VLIB_NODE_FN (tcp6_input_nolookup_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return tcp46_input_inline (vm, node, from_frame, 0 /* is_ip4 */ ,
+ 1 /* is_nolookup */ );
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (tcp4_input_nolookup_node) =
+{
+ .name = "tcp4-input-nolookup",
+ /* Takes a vector of packets. */
+ .vector_size = sizeof (u32),
+ .n_errors = TCP_N_ERROR,
+ .error_strings = tcp_error_strings,
+ .n_next_nodes = TCP_INPUT_N_NEXT,
+ .next_nodes =
+ {
+#define _(s,n) [TCP_INPUT_NEXT_##s] = n,
+ foreach_tcp4_input_next
+#undef _
+ },
+ .format_buffer = format_tcp_header,
+ .format_trace = format_tcp_rx_trace,
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (tcp6_input_nolookup_node) =
+{
+ .name = "tcp6-input-nolookup",
+ /* Takes a vector of packets. */
+ .vector_size = sizeof (u32),
+ .n_errors = TCP_N_ERROR,
+ .error_strings = tcp_error_strings,
+ .n_next_nodes = TCP_INPUT_N_NEXT,
+ .next_nodes =
+ {
+#define _(s,n) [TCP_INPUT_NEXT_##s] = n,
+ foreach_tcp6_input_next
+#undef _
+ },
+ .format_buffer = format_tcp_header,
+ .format_trace = format_tcp_rx_trace,
+};
+/* *INDENT-ON* */
+
VLIB_NODE_FN (tcp4_input_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
- return tcp46_input_inline (vm, node, from_frame, 1 /* is_ip4 */ );
+ return tcp46_input_inline (vm, node, from_frame, 1 /* is_ip4 */ ,
+ 0 /* is_nolookup */ );
}
VLIB_NODE_FN (tcp6_input_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
- return tcp46_input_inline (vm, node, from_frame, 0 /* is_ip4 */ );
+ return tcp46_input_inline (vm, node, from_frame, 0 /* is_ip4 */ ,
+ 0 /* is_nolookup */ );
}
/* *INDENT-OFF* */