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-rw-r--r--src/vnet/hdlc/error.def42
-rw-r--r--src/vnet/hdlc/hdlc.c249
-rw-r--r--src/vnet/hdlc/hdlc.h127
-rw-r--r--src/vnet/hdlc/node.c351
-rw-r--r--src/vnet/hdlc/packet.h72
-rw-r--r--src/vnet/hdlc/pg.c105
6 files changed, 946 insertions, 0 deletions
diff --git a/src/vnet/hdlc/error.def b/src/vnet/hdlc/error.def
new file mode 100644
index 00000000000..16e001bbcfa
--- /dev/null
+++ b/src/vnet/hdlc/error.def
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * hdlc_error.def: hdlc errors
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+hdlc_error (NONE, "no error")
+hdlc_error (UNKNOWN_PROTOCOL, "unknown hdlc protocol")
+hdlc_error (UNKNOWN_ADDRESS_CONTROL, "address, control != 0x0f00")
diff --git a/src/vnet/hdlc/hdlc.c b/src/vnet/hdlc/hdlc.c
new file mode 100644
index 00000000000..174085ac519
--- /dev/null
+++ b/src/vnet/hdlc/hdlc.c
@@ -0,0 +1,249 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * hdlc.c: hdlc
+ *
+ * Copyright (c) 2010 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <vnet/vnet.h>
+#include <vnet/hdlc/hdlc.h>
+
+/* Global main structure. */
+hdlc_main_t hdlc_main;
+
+u8 * format_hdlc_protocol (u8 * s, va_list * args)
+{
+ hdlc_protocol_t p = va_arg (*args, u32);
+ hdlc_main_t * pm = &hdlc_main;
+ hdlc_protocol_info_t * pi = hdlc_get_protocol_info (pm, p);
+
+ if (pi)
+ s = format (s, "%s", pi->name);
+ else
+ s = format (s, "0x%04x", p);
+
+ return s;
+}
+
+u8 * format_hdlc_header_with_length (u8 * s, va_list * args)
+{
+ hdlc_main_t * pm = &hdlc_main;
+ hdlc_header_t * h = va_arg (*args, hdlc_header_t *);
+ u32 max_header_bytes = va_arg (*args, u32);
+ hdlc_protocol_t p = clib_net_to_host_u16 (h->protocol);
+ uword indent, header_bytes;
+
+ header_bytes = sizeof (h[0]);
+ if (max_header_bytes != 0 && header_bytes > max_header_bytes)
+ return format (s, "hdlc header truncated");
+
+ indent = format_get_indent (s);
+
+ s = format (s, "HDLC %U", format_hdlc_protocol, p);
+
+ if (h->address != 0xff)
+ s = format (s, ", address 0x%02x", h->address);
+ if (h->control != 0x03)
+ s = format (s, ", control 0x%02x", h->control);
+
+ if (max_header_bytes != 0 && header_bytes > max_header_bytes)
+ {
+ hdlc_protocol_info_t * pi = hdlc_get_protocol_info (pm, p);
+ vlib_node_t * node = vlib_get_node (pm->vlib_main, pi->node_index);
+ if (node->format_buffer)
+ s = format (s, "\n%U%U",
+ format_white_space, indent,
+ node->format_buffer, (void *) (h + 1),
+ max_header_bytes - header_bytes);
+ }
+
+ return s;
+}
+
+u8 * format_hdlc_header (u8 * s, va_list * args)
+{
+ hdlc_header_t * h = va_arg (*args, hdlc_header_t *);
+ return format (s, "%U", format_hdlc_header_with_length, h, 0);
+}
+
+/* Returns hdlc protocol as an int in host byte order. */
+uword
+unformat_hdlc_protocol_host_byte_order (unformat_input_t * input,
+ va_list * args)
+{
+ u16 * result = va_arg (*args, u16 *);
+ hdlc_main_t * pm = &hdlc_main;
+ int p, i;
+
+ /* Numeric type. */
+ if (unformat (input, "0x%x", &p)
+ || unformat (input, "%d", &p))
+ {
+ if (p >= (1 << 16))
+ return 0;
+ *result = p;
+ return 1;
+ }
+
+ /* Named type. */
+ if (unformat_user (input, unformat_vlib_number_by_name,
+ pm->protocol_info_by_name, &i))
+ {
+ hdlc_protocol_info_t * pi = vec_elt_at_index (pm->protocol_infos, i);
+ *result = pi->protocol;
+ return 1;
+ }
+
+ return 0;
+}
+
+uword
+unformat_hdlc_protocol_net_byte_order (unformat_input_t * input,
+ va_list * args)
+{
+ u16 * result = va_arg (*args, u16 *);
+ if (! unformat_user (input, unformat_hdlc_protocol_host_byte_order, result))
+ return 0;
+ *result = clib_host_to_net_u16 ((u16) *result);
+ return 1;
+}
+
+uword
+unformat_hdlc_header (unformat_input_t * input, va_list * args)
+{
+ u8 ** result = va_arg (*args, u8 **);
+ hdlc_header_t _h, * h = &_h;
+ u16 p;
+
+ if (! unformat (input, "%U",
+ unformat_hdlc_protocol_host_byte_order, &p))
+ return 0;
+
+ h->address = 0xff;
+ h->control = 0x03;
+ h->protocol = clib_host_to_net_u16 (p);
+
+ /* Add header to result. */
+ {
+ void * p;
+ u32 n_bytes = sizeof (h[0]);
+
+ vec_add2 (*result, p, n_bytes);
+ clib_memcpy (p, h, n_bytes);
+ }
+
+ return 1;
+}
+
+static u8*
+hdlc_build_rewrite (vnet_main_t * vnm,
+ u32 sw_if_index,
+ vnet_link_t link_type,
+ const void *dst_address)
+{
+ hdlc_header_t * h;
+ u8* rewrite = NULL;
+ hdlc_protocol_t protocol;
+
+ switch (link_type) {
+#define _(a,b) case VNET_LINK_##a: protocol = HDLC_PROTOCOL_##b; break
+ _ (IP4, ip4);
+ _ (IP6, ip6);
+ _ (MPLS, mpls_unicast);
+#undef _
+ default:
+ return (NULL);
+ }
+
+ vec_validate(rewrite, sizeof(*h)-1);
+ h = (hdlc_header_t *)rewrite;
+ h->address = 0x0f;
+ h->control = 0x00;
+ h->protocol = clib_host_to_net_u16 (protocol);
+
+ return (rewrite);
+}
+
+VNET_HW_INTERFACE_CLASS (hdlc_hw_interface_class) = {
+ .name = "HDLC",
+ .format_header = format_hdlc_header_with_length,
+ .unformat_header = unformat_hdlc_header,
+ .build_rewrite = hdlc_build_rewrite,
+ .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
+};
+
+static void add_protocol (hdlc_main_t * pm,
+ hdlc_protocol_t protocol,
+ char * protocol_name)
+{
+ hdlc_protocol_info_t * pi;
+ u32 i;
+
+ vec_add2 (pm->protocol_infos, pi, 1);
+ i = pi - pm->protocol_infos;
+
+ pi->name = protocol_name;
+ pi->protocol = protocol;
+ pi->next_index = pi->node_index = ~0;
+
+ hash_set (pm->protocol_info_by_protocol, protocol, i);
+ hash_set_mem (pm->protocol_info_by_name, pi->name, i);
+}
+
+static clib_error_t * hdlc_init (vlib_main_t * vm)
+{
+ hdlc_main_t * pm = &hdlc_main;
+
+ memset (pm, 0, sizeof (pm[0]));
+ pm->vlib_main = vm;
+
+ pm->protocol_info_by_name = hash_create_string (0, sizeof (uword));
+ pm->protocol_info_by_protocol = hash_create (0, sizeof (uword));
+
+#define _(n,s) add_protocol (pm, HDLC_PROTOCOL_##s, #s);
+ foreach_hdlc_protocol
+#undef _
+
+ return vlib_call_init_function (vm, hdlc_input_init);
+}
+
+VLIB_INIT_FUNCTION (hdlc_init);
+
+hdlc_main_t * hdlc_get_main (vlib_main_t * vm)
+{
+ vlib_call_init_function (vm, hdlc_init);
+ return &hdlc_main;
+}
+
diff --git a/src/vnet/hdlc/hdlc.h b/src/vnet/hdlc/hdlc.h
new file mode 100644
index 00000000000..73b15c2fac7
--- /dev/null
+++ b/src/vnet/hdlc/hdlc.h
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * hdlc.h: types/functions for hdlc.
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef included_hdlc_h
+#define included_hdlc_h
+
+#include <vnet/vnet.h>
+#include <vnet/hdlc/packet.h>
+#include <vnet/pg/pg.h>
+
+extern vnet_hw_interface_class_t hdlc_hw_interface_class;
+
+typedef enum {
+#define hdlc_error(n,s) HDLC_ERROR_##n,
+#include <vnet/hdlc/error.def>
+#undef hdlc_error
+ HDLC_N_ERROR,
+} hdlc_error_t;
+
+typedef struct {
+ /* Name (a c string). */
+ char * name;
+
+ /* HDLC protocol type in host byte order. */
+ hdlc_protocol_t protocol;
+
+ /* Node which handles this type. */
+ u32 node_index;
+
+ /* Next index for this type. */
+ u32 next_index;
+} hdlc_protocol_info_t;
+
+typedef struct {
+ vlib_main_t * vlib_main;
+
+ hdlc_protocol_info_t * protocol_infos;
+
+ /* Hash tables mapping name/protocol to protocol info index. */
+ uword * protocol_info_by_name, * protocol_info_by_protocol;
+} hdlc_main_t;
+
+always_inline hdlc_protocol_info_t *
+hdlc_get_protocol_info (hdlc_main_t * em, hdlc_protocol_t protocol)
+{
+ uword * p = hash_get (em->protocol_info_by_protocol, protocol);
+ return p ? vec_elt_at_index (em->protocol_infos, p[0]) : 0;
+}
+
+extern hdlc_main_t hdlc_main;
+
+/* Register given node index to take input for given hdlc type. */
+void
+hdlc_register_input_type (vlib_main_t * vm,
+ hdlc_protocol_t protocol,
+ u32 node_index);
+
+void hdlc_set_adjacency (vnet_rewrite_header_t * rw,
+ uword max_data_bytes,
+ hdlc_protocol_t protocol);
+
+format_function_t format_hdlc_protocol;
+format_function_t format_hdlc_header;
+format_function_t format_hdlc_header_with_length;
+
+/* Parse hdlc protocol as 0xXXXX or protocol name.
+ In either host or network byte order. */
+unformat_function_t unformat_hdlc_protocol_host_byte_order;
+unformat_function_t unformat_hdlc_protocol_net_byte_order;
+
+/* Parse hdlc header. */
+unformat_function_t unformat_hdlc_header;
+unformat_function_t unformat_pg_hdlc_header;
+
+always_inline void
+hdlc_setup_node (vlib_main_t * vm, u32 node_index)
+{
+ vlib_node_t * n = vlib_get_node (vm, node_index);
+ pg_node_t * pn = pg_get_node (node_index);
+
+ n->format_buffer = format_hdlc_header_with_length;
+ n->unformat_buffer = unformat_hdlc_header;
+ pn->unformat_edit = unformat_pg_hdlc_header;
+}
+
+void
+hdlc_register_input_protocol (vlib_main_t * vm,
+ hdlc_protocol_t protocol,
+ u32 node_index);
+
+#endif /* included_hdlc_h */
diff --git a/src/vnet/hdlc/node.c b/src/vnet/hdlc/node.c
new file mode 100644
index 00000000000..4fe0296aca1
--- /dev/null
+++ b/src/vnet/hdlc/node.c
@@ -0,0 +1,351 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * hdlc_node.c: hdlc packet processing
+ *
+ * Copyright (c) 2010 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/pg/pg.h>
+#include <vnet/hdlc/hdlc.h>
+#include <vppinfra/sparse_vec.h>
+
+#define foreach_hdlc_input_next \
+ _ (PUNT, "error-punt") \
+ _ (DROP, "error-drop")
+
+typedef enum {
+#define _(s,n) HDLC_INPUT_NEXT_##s,
+ foreach_hdlc_input_next
+#undef _
+ HDLC_INPUT_N_NEXT,
+} hdlc_input_next_t;
+
+typedef struct {
+ u8 packet_data[32];
+} hdlc_input_trace_t;
+
+static u8 * format_hdlc_input_trace (u8 * s, va_list * va)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
+ hdlc_input_trace_t * t = va_arg (*va, hdlc_input_trace_t *);
+
+ s = format (s, "%U", format_hdlc_header, t->packet_data);
+
+ return s;
+}
+
+typedef struct {
+ /* Sparse vector mapping hdlc protocol in network byte order
+ to next index. */
+ u16 * next_by_protocol;
+
+ u32 * sparse_index_by_next_index;
+} hdlc_input_runtime_t;
+
+static uword
+hdlc_input (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ hdlc_input_runtime_t * rt = (void *) node->runtime_data;
+ u32 n_left_from, next_index, i_next, * from, * to_next;
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ if (node->flags & VLIB_NODE_FLAG_TRACE)
+ vlib_trace_frame_buffers_only (vm, node,
+ from,
+ n_left_from,
+ sizeof (from[0]),
+ sizeof (hdlc_input_trace_t));
+
+ next_index = node->cached_next_index;
+ i_next = vec_elt (rt->sparse_index_by_next_index, 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 >= 4 && n_left_to_next >= 2)
+ {
+ u32 bi0, bi1;
+ vlib_buffer_t * b0, * b1;
+ hdlc_header_t * h0, * h1;
+ u32 i0, i1, len0, len1, protocol0, protocol1, enqueue_code;
+
+ /* Prefetch next iteration. */
+ {
+ vlib_buffer_t * b2, * b3;
+
+ b2 = vlib_get_buffer (vm, from[2]);
+ b3 = vlib_get_buffer (vm, from[3]);
+
+ vlib_prefetch_buffer_header (b2, LOAD);
+ vlib_prefetch_buffer_header (b3, LOAD);
+
+ CLIB_PREFETCH (b2->data, sizeof (h0[0]), LOAD);
+ CLIB_PREFETCH (b3->data, sizeof (h1[0]), LOAD);
+ }
+
+ bi0 = from[0];
+ bi1 = from[1];
+ to_next[0] = bi0;
+ to_next[1] = bi1;
+ from += 2;
+ to_next += 2;
+ n_left_to_next -= 2;
+ n_left_from -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ h0 = (void *) (b0->data + b0->current_data);
+ h1 = (void *) (b1->data + b1->current_data);
+
+ protocol0 = h0->protocol;
+ protocol1 = h1->protocol;
+
+ /* Add padding bytes for OSI protocols. */
+ len0 = sizeof (h0[0]);
+ len1 = sizeof (h1[0]);
+
+ len0 += protocol0 == clib_host_to_net_u16 (HDLC_PROTOCOL_osi);
+ len1 += protocol1 == clib_host_to_net_u16 (HDLC_PROTOCOL_osi);
+
+ b0->current_data += len0;
+ b1->current_data += len1;
+
+ b0->current_length -= len0;
+ b1->current_length -= len1;
+
+ /* Index sparse array with network byte order. */
+ sparse_vec_index2 (rt->next_by_protocol, protocol0, protocol1, &i0, &i1);
+
+ b0->error = node->errors[i0 == SPARSE_VEC_INVALID_INDEX ? HDLC_ERROR_UNKNOWN_PROTOCOL : HDLC_ERROR_NONE];
+ b1->error = node->errors[i1 == SPARSE_VEC_INVALID_INDEX ? HDLC_ERROR_UNKNOWN_PROTOCOL : HDLC_ERROR_NONE];
+
+ enqueue_code = (i0 != i_next) + 2*(i1 != i_next);
+
+ if (PREDICT_FALSE (enqueue_code != 0))
+ {
+ switch (enqueue_code)
+ {
+ case 1:
+ /* A B A */
+ to_next[-2] = bi1;
+ to_next -= 1;
+ n_left_to_next += 1;
+ vlib_set_next_frame_buffer (vm, node, vec_elt (rt->next_by_protocol, i0), bi0);
+ break;
+
+ case 2:
+ /* A A B */
+ to_next -= 1;
+ n_left_to_next += 1;
+ vlib_set_next_frame_buffer (vm, node, vec_elt (rt->next_by_protocol, i1), bi1);
+ 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, vec_elt (rt->next_by_protocol, i0), bi0);
+ vlib_set_next_frame_buffer (vm, node, vec_elt (rt->next_by_protocol, i1), bi1);
+ if (i0 == i1)
+ {
+ vlib_put_next_frame (vm, node, next_index,
+ n_left_to_next);
+ i_next = i1;
+ next_index = vec_elt (rt->next_by_protocol, i_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;
+ vlib_buffer_t * b0;
+ hdlc_header_t * h0;
+ u32 i0, len0, protocol0;
+
+ 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);
+
+ h0 = (void *) (b0->data + b0->current_data);
+
+ protocol0 = h0->protocol;
+
+ /* Add padding bytes for OSI protocols. */
+ len0 = sizeof (h0[0]);
+ len0 += protocol0 == clib_host_to_net_u16 (HDLC_PROTOCOL_osi);
+
+ b0->current_data += len0;
+ b0->current_length -= len0;
+
+ i0 = sparse_vec_index (rt->next_by_protocol, protocol0);
+
+ b0->error = node->errors[i0 == SPARSE_VEC_INVALID_INDEX ? HDLC_ERROR_UNKNOWN_PROTOCOL : HDLC_ERROR_NONE];
+
+ /* Sent packet to wrong next? */
+ if (PREDICT_FALSE (i0 != i_next))
+ {
+ /* Return old frame; remove incorrectly enqueued packet. */
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next + 1);
+
+ /* Send to correct next. */
+ i_next = i0;
+ next_index = vec_elt (rt->next_by_protocol, i_next);
+ vlib_get_next_frame (vm, node, next_index,
+ to_next, n_left_to_next);
+
+ to_next[0] = bi0;
+ to_next += 1;
+ n_left_to_next -= 1;
+ }
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ return from_frame->n_vectors;
+}
+
+static char * hdlc_error_strings[] = {
+#define hdlc_error(n,s) s,
+#include "error.def"
+#undef hdlc_error
+};
+
+VLIB_REGISTER_NODE (hdlc_input_node) = {
+ .function = hdlc_input,
+ .name = "hdlc-input",
+ /* Takes a vector of packets. */
+ .vector_size = sizeof (u32),
+
+ .runtime_data_bytes = sizeof (hdlc_input_runtime_t),
+
+ .n_errors = HDLC_N_ERROR,
+ .error_strings = hdlc_error_strings,
+
+ .n_next_nodes = HDLC_INPUT_N_NEXT,
+ .next_nodes = {
+#define _(s,n) [HDLC_INPUT_NEXT_##s] = n,
+ foreach_hdlc_input_next
+#undef _
+ },
+
+ .format_buffer = format_hdlc_header_with_length,
+ .format_trace = format_hdlc_input_trace,
+ .unformat_buffer = unformat_hdlc_header,
+};
+
+static clib_error_t * hdlc_input_init (vlib_main_t * vm)
+{
+ hdlc_input_runtime_t * rt;
+
+ {
+ clib_error_t * error = vlib_call_init_function (vm, hdlc_init);
+ if (error)
+ clib_error_report (error);
+ }
+
+ hdlc_setup_node (vm, hdlc_input_node.index);
+
+ rt = vlib_node_get_runtime_data (vm, hdlc_input_node.index);
+
+ rt->next_by_protocol = sparse_vec_new
+ (/* elt bytes */ sizeof (rt->next_by_protocol[0]),
+ /* bits in index */ BITS (((hdlc_header_t *) 0)->protocol));
+
+ vec_validate (rt->sparse_index_by_next_index, HDLC_INPUT_NEXT_DROP);
+ vec_validate (rt->sparse_index_by_next_index, HDLC_INPUT_NEXT_PUNT);
+ rt->sparse_index_by_next_index[HDLC_INPUT_NEXT_DROP]
+ = SPARSE_VEC_INVALID_INDEX;
+ rt->sparse_index_by_next_index[HDLC_INPUT_NEXT_PUNT]
+ = SPARSE_VEC_INVALID_INDEX;
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (hdlc_input_init);
+
+void
+hdlc_register_input_protocol (vlib_main_t * vm,
+ hdlc_protocol_t protocol,
+ u32 node_index)
+{
+ hdlc_main_t * em = &hdlc_main;
+ hdlc_protocol_info_t * pi;
+ hdlc_input_runtime_t * rt;
+ u16 * n;
+ u32 i;
+
+ {
+ clib_error_t * error = vlib_call_init_function (vm, hdlc_input_init);
+ if (error)
+ clib_error_report (error);
+ }
+
+ pi = hdlc_get_protocol_info (em, protocol);
+ pi->node_index = node_index;
+ pi->next_index = vlib_node_add_next (vm,
+ hdlc_input_node.index,
+ node_index);
+
+ /* Setup hdlc protocol -> next index sparse vector mapping. */
+ rt = vlib_node_get_runtime_data (vm, hdlc_input_node.index);
+ n = sparse_vec_validate (rt->next_by_protocol, clib_host_to_net_u16 (protocol));
+ n[0] = pi->next_index;
+
+ /* Rebuild next index -> sparse index inverse mapping when sparse vector
+ is updated. */
+ vec_validate (rt->sparse_index_by_next_index, pi->next_index);
+ for (i = 1; i < vec_len (rt->next_by_protocol); i++)
+ rt->sparse_index_by_next_index[rt->next_by_protocol[i]] = i;
+}
diff --git a/src/vnet/hdlc/packet.h b/src/vnet/hdlc/packet.h
new file mode 100644
index 00000000000..45e5496fbc8
--- /dev/null
+++ b/src/vnet/hdlc/packet.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef included_vnet_hdlc_packet_h
+#define included_vnet_hdlc_packet_h
+
+/*
+ * HDLC packet format
+ *
+ * Copyright (c) 2009 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#define foreach_hdlc_protocol \
+ _ (0x0800, ip4) \
+ _ (0x2000, cdp) \
+ _ (0x8035, slarp) \
+ _ (0x8847, mpls_unicast) \
+ _ (0x8848, mpls_multicast) \
+ _ (0x86dd, ip6) \
+ _ (0xfefe, osi)
+
+typedef enum {
+#define _(n,f) HDLC_PROTOCOL_##f = n,
+ foreach_hdlc_protocol
+#undef _
+} hdlc_protocol_t;
+
+typedef struct {
+ /* Set to 0x0f for unicast; 0x8f for broadcast. */
+ u8 address;
+
+ /* Always zero. */
+ u8 control;
+
+ /* Layer 3 protocol for this packet. */
+ u16 protocol;
+
+ /* Layer 3 payload. */
+ u8 payload[0];
+} hdlc_header_t;
+
+#endif /* included_vnet_hdlc_packet_h */
diff --git a/src/vnet/hdlc/pg.c b/src/vnet/hdlc/pg.c
new file mode 100644
index 00000000000..b8e67022b08
--- /dev/null
+++ b/src/vnet/hdlc/pg.c
@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * hdlc_pg.c: packet generator hdlc interface
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/pg/pg.h>
+#include <vnet/hdlc/hdlc.h>
+
+typedef struct {
+ pg_edit_t address;
+ pg_edit_t control;
+ pg_edit_t protocol;
+} pg_hdlc_header_t;
+
+static inline void
+pg_hdlc_header_init (pg_hdlc_header_t * e)
+{
+ pg_edit_init (&e->address, hdlc_header_t, address);
+ pg_edit_init (&e->control, hdlc_header_t, control);
+ pg_edit_init (&e->protocol, hdlc_header_t, protocol);
+}
+
+uword
+unformat_pg_hdlc_header (unformat_input_t * input, va_list * args)
+{
+ pg_stream_t * s = va_arg (*args, pg_stream_t *);
+ pg_hdlc_header_t * h;
+ u32 group_index, error;
+
+ h = pg_create_edit_group (s, sizeof (h[0]), sizeof (hdlc_header_t),
+ &group_index);
+ pg_hdlc_header_init (h);
+
+ pg_edit_set_fixed (&h->address, 0x0f);
+ pg_edit_set_fixed (&h->control, 0x00);
+
+ error = 1;
+ if (! unformat (input, "%U",
+ unformat_pg_edit,
+ unformat_hdlc_protocol_net_byte_order, &h->protocol))
+ goto done;
+
+ {
+ hdlc_main_t * pm = &hdlc_main;
+ hdlc_protocol_info_t * pi = 0;
+ pg_node_t * pg_node = 0;
+
+ if (h->protocol.type == PG_EDIT_FIXED)
+ {
+ u16 t = *(u16 *) h->protocol.values[PG_EDIT_LO];
+ pi = hdlc_get_protocol_info (pm, clib_net_to_host_u16 (t));
+ if (pi && pi->node_index != ~0)
+ pg_node = pg_get_node (pi->node_index);
+ }
+
+ if (pg_node && pg_node->unformat_edit
+ && unformat_user (input, pg_node->unformat_edit, s))
+ ;
+
+ else if (! unformat_user (input, unformat_pg_payload, s))
+ goto done;
+ }
+
+ error = 0;
+ done:
+ if (error)
+ pg_free_edit_group (s);
+ return error == 0;
+}
+