diff options
Diffstat (limited to 'src/vnet/hdlc')
| -rw-r--r-- | src/vnet/hdlc/error.def | 42 | ||||
| -rw-r--r-- | src/vnet/hdlc/hdlc.c | 249 | ||||
| -rw-r--r-- | src/vnet/hdlc/hdlc.h | 127 | ||||
| -rw-r--r-- | src/vnet/hdlc/node.c | 351 | ||||
| -rw-r--r-- | src/vnet/hdlc/packet.h | 72 | ||||
| -rw-r--r-- | src/vnet/hdlc/pg.c | 105 |
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 00000000..16e001bb --- /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 00000000..174085ac --- /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 00000000..73b15c2f --- /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 00000000..4fe0296a --- /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 00000000..45e5496f --- /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 00000000..b8e67022 --- /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; +} + |