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authorDave Barach <dave@barachs.net>2017-02-28 15:15:56 -0500
committerDamjan Marion <dmarion.lists@gmail.com>2017-03-01 20:25:48 +0000
commit68b0fb0c620c7451ef1a6380c43c39de6614db51 (patch)
treef4188fa09723152f3ebfcebbbe4cacad903e0cf1 /src/vnet/ip/ip4_forward.c
parentf869028740aaebeb0375077d4d84fa07a17fff1a (diff)
VPP-598: tcp stack initial commit
Change-Id: I49e5ce0aae6e4ff634024387ceaf7dbc432a0351 Signed-off-by: Dave Barach <dave@barachs.net> Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/vnet/ip/ip4_forward.c')
-rw-r--r--src/vnet/ip/ip4_forward.c173
1 files changed, 109 insertions, 64 deletions
diff --git a/src/vnet/ip/ip4_forward.c b/src/vnet/ip/ip4_forward.c
index 8081b34b3dc..66d91ab697d 100644
--- a/src/vnet/ip/ip4_forward.c
+++ b/src/vnet/ip/ip4_forward.c
@@ -1478,8 +1478,18 @@ ip4_tcp_udp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
return p0->flags;
}
-static uword
-ip4_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
+/* *INDENT-OFF* */
+VNET_FEATURE_ARC_INIT (ip4_local) =
+{
+ .arc_name = "ip4-local",
+ .start_nodes = VNET_FEATURES ("ip4-local"),
+};
+/* *INDENT-ON* */
+
+static inline uword
+ip4_local_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, int head_of_feature_arc)
{
ip4_main_t *im = &ip4_main;
ip_lookup_main_t *lm = &im->lookup_main;
@@ -1487,6 +1497,7 @@ ip4_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
u32 *from, *to_next, n_left_from, n_left_to_next;
vlib_node_runtime_t *error_node =
vlib_node_get_runtime (vm, ip4_input_node.index);
+ u8 arc_index = vnet_feat_arc_ip4_local.feature_arc_index;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
@@ -1513,7 +1524,7 @@ ip4_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
i32 len_diff0, len_diff1;
u8 error0, is_udp0, is_tcp_udp0, good_tcp_udp0, proto0;
u8 error1, is_udp1, is_tcp_udp1, good_tcp_udp1, proto1;
- u8 enqueue_code;
+ u32 sw_if_index0, sw_if_index1;
pi0 = to_next[0] = from[0];
pi1 = to_next[1] = from[1];
@@ -1522,6 +1533,8 @@ ip4_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
to_next += 2;
n_left_to_next -= 2;
+ next0 = next1 = IP_LOCAL_NEXT_DROP;
+
p0 = vlib_get_buffer (vm, pi0);
p1 = vlib_get_buffer (vm, pi1);
@@ -1531,14 +1544,18 @@ ip4_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
vnet_buffer (p0)->ip.start_of_ip_header = p0->current_data;
vnet_buffer (p1)->ip.start_of_ip_header = p1->current_data;
- fib_index0 = vec_elt (im->fib_index_by_sw_if_index,
- vnet_buffer (p0)->sw_if_index[VLIB_RX]);
+ sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
+ sw_if_index1 = vnet_buffer (p1)->sw_if_index[VLIB_RX];
+
+ fib_index0 = vec_elt (im->fib_index_by_sw_if_index, sw_if_index0);
+ fib_index1 = vec_elt (im->fib_index_by_sw_if_index, sw_if_index1);
+
+ fib_index0 = vec_elt (im->fib_index_by_sw_if_index, sw_if_index0);
fib_index0 =
(vnet_buffer (p0)->sw_if_index[VLIB_TX] ==
(u32) ~ 0) ? fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
- fib_index1 = vec_elt (im->fib_index_by_sw_if_index,
- vnet_buffer (p1)->sw_if_index[VLIB_RX]);
+ fib_index1 = vec_elt (im->fib_index_by_sw_if_index, sw_if_index1);
fib_index1 =
(vnet_buffer (p1)->sw_if_index[VLIB_TX] ==
(u32) ~ 0) ? fib_index1 : vnet_buffer (p1)->sw_if_index[VLIB_TX];
@@ -1557,6 +1574,13 @@ ip4_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
until support of IP frag reassembly is implemented */
proto0 = ip4_is_fragment (ip0) ? 0xfe : ip0->protocol;
proto1 = ip4_is_fragment (ip1) ? 0xfe : ip1->protocol;
+
+ if (head_of_feature_arc == 0)
+ {
+ error0 = error1 = IP4_ERROR_UNKNOWN_PROTOCOL;
+ goto skip_checks;
+ }
+
is_udp0 = proto0 == IP_PROTOCOL_UDP;
is_udp1 = proto1 == IP_PROTOCOL_UDP;
is_tcp_udp0 = is_udp0 || proto0 == IP_PROTOCOL_TCP;
@@ -1686,6 +1710,7 @@ ip4_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
next0 = lm->local_next_by_ip_protocol[proto0];
next1 = lm->local_next_by_ip_protocol[proto1];
+ skip_checks:
next0 =
error0 != IP4_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
next1 =
@@ -1694,44 +1719,17 @@ ip4_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
p0->error = error0 ? error_node->errors[error0] : 0;
p1->error = error1 ? error_node->errors[error1] : 0;
- enqueue_code = (next0 != next_index) + 2 * (next1 != next_index);
-
- if (PREDICT_FALSE (enqueue_code != 0))
+ if (head_of_feature_arc)
{
- switch (enqueue_code)
- {
- case 1:
- /* A B A */
- to_next[-2] = pi1;
- to_next -= 1;
- n_left_to_next += 1;
- vlib_set_next_frame_buffer (vm, node, next0, pi0);
- break;
-
- case 2:
- /* A A B */
- to_next -= 1;
- n_left_to_next += 1;
- vlib_set_next_frame_buffer (vm, node, next1, pi1);
- break;
-
- case 3:
- /* A B B or A B C */
- to_next -= 2;
- n_left_to_next += 2;
- vlib_set_next_frame_buffer (vm, node, next0, pi0);
- vlib_set_next_frame_buffer (vm, node, next1, pi1);
- if (next0 == next1)
- {
- vlib_put_next_frame (vm, node, next_index,
- n_left_to_next);
- next_index = next1;
- vlib_get_next_frame (vm, node, next_index, to_next,
- n_left_to_next);
- }
- break;
- }
+ if (PREDICT_TRUE (error0 == (u8) IP4_ERROR_UNKNOWN_PROTOCOL))
+ vnet_feature_arc_start (arc_index, sw_if_index0, &next0, p0);
+ if (PREDICT_TRUE (error1 == (u8) IP4_ERROR_UNKNOWN_PROTOCOL))
+ vnet_feature_arc_start (arc_index, sw_if_index1, &next1, p1);
}
+
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
+ n_left_to_next, pi0, pi1,
+ next0, next1);
}
while (n_left_from > 0 && n_left_to_next > 0)
@@ -1746,6 +1744,7 @@ ip4_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
u8 error0, is_udp0, is_tcp_udp0, good_tcp_udp0, proto0;
load_balance_t *lb0;
const dpo_id_t *dpo0;
+ u32 sw_if_index0;
pi0 = to_next[0] = from[0];
from += 1;
@@ -1753,14 +1752,18 @@ ip4_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
to_next += 1;
n_left_to_next -= 1;
+ next0 = IP_LOCAL_NEXT_DROP;
+
p0 = vlib_get_buffer (vm, pi0);
ip0 = vlib_buffer_get_current (p0);
vnet_buffer (p0)->ip.start_of_ip_header = p0->current_data;
- fib_index0 = vec_elt (im->fib_index_by_sw_if_index,
- vnet_buffer (p0)->sw_if_index[VLIB_RX]);
+ sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
+
+ fib_index0 = vec_elt (im->fib_index_by_sw_if_index, sw_if_index0);
+
fib_index0 =
(vnet_buffer (p0)->sw_if_index[VLIB_TX] ==
(u32) ~ 0) ? fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
@@ -1775,6 +1778,13 @@ ip4_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
/* Treat IP frag packets as "experimental" protocol for now
until support of IP frag reassembly is implemented */
proto0 = ip4_is_fragment (ip0) ? 0xfe : ip0->protocol;
+
+ if (head_of_feature_arc == 0)
+ {
+ error0 = IP4_ERROR_UNKNOWN_PROTOCOL;
+ goto skip_check;
+ }
+
is_udp0 = proto0 == IP_PROTOCOL_UDP;
is_tcp_udp0 = is_udp0 || proto0 == IP_PROTOCOL_TCP;
@@ -1847,6 +1857,8 @@ ip4_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
ip0->dst_address.as_u32 != 0xFFFFFFFF)
? IP4_ERROR_SRC_LOOKUP_MISS : error0);
+ skip_check:
+
next0 = lm->local_next_by_ip_protocol[proto0];
next0 =
@@ -1854,18 +1866,15 @@ ip4_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
p0->error = error0 ? error_node->errors[error0] : 0;
- if (PREDICT_FALSE (next0 != next_index))
+ if (head_of_feature_arc)
{
- n_left_to_next += 1;
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
-
- next_index = next0;
- vlib_get_next_frame (vm, node, next_index, to_next,
- n_left_to_next);
- to_next[0] = pi0;
- to_next += 1;
- n_left_to_next -= 1;
+ if (PREDICT_TRUE (error0 == (u8) IP4_ERROR_UNKNOWN_PROTOCOL))
+ vnet_feature_arc_start (arc_index, sw_if_index0, &next0, p0);
}
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, pi0, next0);
+
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
@@ -1874,21 +1883,57 @@ ip4_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
return frame->n_vectors;
}
+static uword
+ip4_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return ip4_local_inline (vm, node, frame, 1 /* head of feature arc */ );
+}
+
+/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip4_local_node) =
{
- .function = ip4_local,.name = "ip4-local",.vector_size =
- sizeof (u32),.format_trace =
- format_ip4_forward_next_trace,.n_next_nodes =
- IP_LOCAL_N_NEXT,.next_nodes =
+ .function = ip4_local,
+ .name = "ip4-local",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ip4_forward_next_trace,
+ .n_next_nodes = IP_LOCAL_N_NEXT,
+ .next_nodes =
{
- [IP_LOCAL_NEXT_DROP] = "error-drop",
- [IP_LOCAL_NEXT_PUNT] = "error-punt",
- [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip4-udp-lookup",
- [IP_LOCAL_NEXT_ICMP] = "ip4-icmp-input",}
-,};
+ [IP_LOCAL_NEXT_DROP] = "error-drop",
+ [IP_LOCAL_NEXT_PUNT] = "error-punt",
+ [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip4-udp-lookup",
+ [IP_LOCAL_NEXT_ICMP] = "ip4-icmp-input",},
+};
+/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (ip4_local_node, ip4_local);
+static uword
+ip4_local_end_of_arc (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return ip4_local_inline (vm, node, frame, 0 /* head of feature arc */ );
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip4_local_end_of_arc_node,static) = {
+ .function = ip4_local_end_of_arc,
+ .name = "ip4-local-end-of-arc",
+ .vector_size = sizeof (u32),
+
+ .format_trace = format_ip4_forward_next_trace,
+ .sibling_of = "ip4-local",
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (ip4_local_end_of_arc_node, ip4_local_end_of_arc)
+
+VNET_FEATURE_INIT (ip4_local_end_of_arc, static) = {
+ .arc_name = "ip4-local",
+ .node_name = "ip4-local-end-of-arc",
+ .runs_before = 0, /* not before any other features */
+};
+/* *INDENT-ON* */
+
void
ip4_register_protocol (u32 protocol, u32 node_index)
{