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pcep_msg_tlvs_encoding.c
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// SPDX-License-Identifier: LGPL-2.1-or-later
/*
* This file is part of the PCEPlib, a PCEP protocol library.
*
* Copyright (C) 2020 Volta Networks https://voltanet.io/
*
* Author : Brady Johnson <brady@voltanet.io>
*
*/
/*
* Encoding and decoding for PCEP Object TLVs.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef __FreeBSD__
#include <sys/endian.h>
#else
#include <endian.h>
#endif /* __FreeBSD__ */
#include <stdlib.h>
#include <string.h>
#include "pcep.h"
#include "pcep_msg_encoding.h"
#include "pcep_msg_tlvs.h"
#include "pcep_utils_logging.h"
#include "pcep_utils_memory.h"
void write_tlv_header(struct pcep_object_tlv_header *tlv_hdr,
uint16_t tlv_length, struct pcep_versioning *versioning,
uint8_t *buf);
void pcep_decode_tlv_hdr(const uint8_t *tlv_buf,
struct pcep_object_tlv_header *tlv_hdr);
/*
* forward declarations for initialize_tlv_encoders()
*/
uint16_t pcep_encode_tlv_no_path_vector(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
uint16_t
pcep_encode_tlv_stateful_pce_capability(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
uint16_t pcep_encode_tlv_symbolic_path_name(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
uint16_t
pcep_encode_tlv_ipv4_lsp_identifiers(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
uint16_t
pcep_encode_tlv_ipv6_lsp_identifiers(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
uint16_t pcep_encode_tlv_lsp_error_code(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
uint16_t pcep_encode_tlv_rsvp_error_spec(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
uint16_t pcep_encode_tlv_lsp_db_version(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
uint16_t pcep_encode_tlv_speaker_entity_id(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
uint16_t pcep_encode_tlv_sr_pce_capability(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
uint16_t pcep_encode_tlv_path_setup_type(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
uint16_t
pcep_encode_tlv_path_setup_type_capability(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
uint16_t pcep_encode_tlv_pol_id(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
uint16_t pcep_encode_tlv_pol_name(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
uint16_t pcep_encode_tlv_cpath_id(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
uint16_t pcep_encode_tlv_cpath_preference(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
uint16_t pcep_encode_tlv_vendor_info(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
uint16_t pcep_encode_tlv_arbitrary(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
uint16_t pcep_encode_tlv_of_list(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
typedef uint16_t (*tlv_encoder_funcptr)(struct pcep_object_tlv_header *,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf);
#define MAX_TLV_ENCODER_INDEX 65533 + 1 // 65
#define PCEP_TLV_ENCODERS_ARGS \
struct pcep_object_tlv_header *, struct pcep_versioning *versioning, \
uint8_t *tlv_body_buf
uint16_t (*const tlv_encoders[MAX_TLV_ENCODER_INDEX])(
PCEP_TLV_ENCODERS_ARGS) = {
[PCEP_OBJ_TLV_TYPE_NO_PATH_VECTOR] = pcep_encode_tlv_no_path_vector,
[PCEP_OBJ_TLV_TYPE_STATEFUL_PCE_CAPABILITY] =
pcep_encode_tlv_stateful_pce_capability,
[PCEP_OBJ_TLV_TYPE_SYMBOLIC_PATH_NAME] =
pcep_encode_tlv_symbolic_path_name,
[PCEP_OBJ_TLV_TYPE_IPV4_LSP_IDENTIFIERS] =
pcep_encode_tlv_ipv4_lsp_identifiers,
[PCEP_OBJ_TLV_TYPE_IPV6_LSP_IDENTIFIERS] =
pcep_encode_tlv_ipv6_lsp_identifiers,
[PCEP_OBJ_TLV_TYPE_LSP_ERROR_CODE] = pcep_encode_tlv_lsp_error_code,
[PCEP_OBJ_TLV_TYPE_RSVP_ERROR_SPEC] = pcep_encode_tlv_rsvp_error_spec,
[PCEP_OBJ_TLV_TYPE_LSP_DB_VERSION] = pcep_encode_tlv_lsp_db_version,
[PCEP_OBJ_TLV_TYPE_SPEAKER_ENTITY_ID] =
pcep_encode_tlv_speaker_entity_id,
[PCEP_OBJ_TLV_TYPE_SR_PCE_CAPABILITY] =
pcep_encode_tlv_sr_pce_capability,
[PCEP_OBJ_TLV_TYPE_PATH_SETUP_TYPE] = pcep_encode_tlv_path_setup_type,
[PCEP_OBJ_TLV_TYPE_PATH_SETUP_TYPE_CAPABILITY] =
pcep_encode_tlv_path_setup_type_capability,
[PCEP_OBJ_TLV_TYPE_SRPOLICY_POL_ID] = pcep_encode_tlv_pol_id,
[PCEP_OBJ_TLV_TYPE_SRPOLICY_POL_NAME] = pcep_encode_tlv_pol_name,
[PCEP_OBJ_TLV_TYPE_SRPOLICY_CPATH_ID] = pcep_encode_tlv_cpath_id,
[PCEP_OBJ_TLV_TYPE_SRPOLICY_CPATH_PREFERENCE] =
pcep_encode_tlv_cpath_preference,
[PCEP_OBJ_TLV_TYPE_VENDOR_INFO] = pcep_encode_tlv_vendor_info,
[PCEP_OBJ_TLV_TYPE_ARBITRARY] = pcep_encode_tlv_arbitrary,
[PCEP_OBJ_TLV_TYPE_OBJECTIVE_FUNCTION_LIST] = pcep_encode_tlv_of_list,
};
/*
* forward declarations for initialize_tlv_decoders()
*/
struct pcep_object_tlv_header *
pcep_decode_tlv_no_path_vector(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf);
struct pcep_object_tlv_header *
pcep_decode_tlv_stateful_pce_capability(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf);
struct pcep_object_tlv_header *
pcep_decode_tlv_symbolic_path_name(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf);
struct pcep_object_tlv_header *
pcep_decode_tlv_ipv4_lsp_identifiers(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf);
struct pcep_object_tlv_header *
pcep_decode_tlv_ipv6_lsp_identifiers(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf);
struct pcep_object_tlv_header *
pcep_decode_tlv_lsp_error_code(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf);
struct pcep_object_tlv_header *
pcep_decode_tlv_rsvp_error_spec(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf);
struct pcep_object_tlv_header *
pcep_decode_tlv_lsp_db_version(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf);
struct pcep_object_tlv_header *
pcep_decode_tlv_speaker_entity_id(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf);
struct pcep_object_tlv_header *
pcep_decode_tlv_sr_pce_capability(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf);
struct pcep_object_tlv_header *
pcep_decode_tlv_path_setup_type(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf);
struct pcep_object_tlv_header *pcep_decode_tlv_path_setup_type_capability(
struct pcep_object_tlv_header *tlv_hdr, const uint8_t *tlv_body_buf);
struct pcep_object_tlv_header *
pcep_decode_tlv_pol_id(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf);
struct pcep_object_tlv_header *
pcep_decode_tlv_pol_name(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf);
struct pcep_object_tlv_header *
pcep_decode_tlv_cpath_id(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf);
struct pcep_object_tlv_header *
pcep_decode_tlv_cpath_preference(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf);
struct pcep_object_tlv_header *
pcep_decode_tlv_vendor_info(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf);
struct pcep_object_tlv_header *
pcep_decode_tlv_arbitrary(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf);
struct pcep_object_tlv_header *
pcep_decode_tlv_of_list(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf);
typedef struct pcep_object_tlv_header *(*tlv_decoder_funcptr)(
struct pcep_object_tlv_header *tlv_hdr, const uint8_t *tlv_body_buf);
// tlv_decoder_funcptr tlv_decoders[MAX_TLV_ENCODER_INDEX];
#define PCEP_TLV_DECODERS_ARGS \
struct pcep_object_tlv_header *tlv_hdr, const uint8_t *tlv_body_buf
struct pcep_object_tlv_header *(*const tlv_decoders[MAX_TLV_ENCODER_INDEX])(
PCEP_TLV_DECODERS_ARGS) = {
[PCEP_OBJ_TLV_TYPE_NO_PATH_VECTOR] = pcep_decode_tlv_no_path_vector,
[PCEP_OBJ_TLV_TYPE_STATEFUL_PCE_CAPABILITY] =
pcep_decode_tlv_stateful_pce_capability,
[PCEP_OBJ_TLV_TYPE_SYMBOLIC_PATH_NAME] =
pcep_decode_tlv_symbolic_path_name,
[PCEP_OBJ_TLV_TYPE_IPV4_LSP_IDENTIFIERS] =
pcep_decode_tlv_ipv4_lsp_identifiers,
[PCEP_OBJ_TLV_TYPE_IPV6_LSP_IDENTIFIERS] =
pcep_decode_tlv_ipv6_lsp_identifiers,
[PCEP_OBJ_TLV_TYPE_LSP_ERROR_CODE] = pcep_decode_tlv_lsp_error_code,
[PCEP_OBJ_TLV_TYPE_RSVP_ERROR_SPEC] = pcep_decode_tlv_rsvp_error_spec,
[PCEP_OBJ_TLV_TYPE_LSP_DB_VERSION] = pcep_decode_tlv_lsp_db_version,
[PCEP_OBJ_TLV_TYPE_SPEAKER_ENTITY_ID] =
pcep_decode_tlv_speaker_entity_id,
[PCEP_OBJ_TLV_TYPE_SR_PCE_CAPABILITY] =
pcep_decode_tlv_sr_pce_capability,
[PCEP_OBJ_TLV_TYPE_PATH_SETUP_TYPE] = pcep_decode_tlv_path_setup_type,
[PCEP_OBJ_TLV_TYPE_PATH_SETUP_TYPE_CAPABILITY] =
pcep_decode_tlv_path_setup_type_capability,
[PCEP_OBJ_TLV_TYPE_SRPOLICY_POL_ID] = pcep_decode_tlv_pol_id,
[PCEP_OBJ_TLV_TYPE_SRPOLICY_POL_NAME] = pcep_decode_tlv_pol_name,
[PCEP_OBJ_TLV_TYPE_SRPOLICY_CPATH_ID] = pcep_decode_tlv_cpath_id,
[PCEP_OBJ_TLV_TYPE_SRPOLICY_CPATH_PREFERENCE] =
pcep_decode_tlv_cpath_preference,
[PCEP_OBJ_TLV_TYPE_VENDOR_INFO] = pcep_decode_tlv_vendor_info,
[PCEP_OBJ_TLV_TYPE_ARBITRARY] = pcep_decode_tlv_arbitrary,
[PCEP_OBJ_TLV_TYPE_OBJECTIVE_FUNCTION_LIST] = pcep_decode_tlv_of_list,
};
static void initialize_tlv_coders(void)
{
static bool initialized = false;
if (initialized == true) {
return;
}
initialized = true;
/* Encoders */
/*
memset(tlv_encoders, 0, sizeof(tlv_encoder_funcptr) *
MAX_TLV_ENCODER_INDEX); tlv_encoders[PCEP_OBJ_TLV_TYPE_NO_PATH_VECTOR] =
pcep_encode_tlv_no_path_vector;
tlv_encoders[PCEP_OBJ_TLV_TYPE_STATEFUL_PCE_CAPABILITY] =
pcep_encode_tlv_stateful_pce_capability;
tlv_encoders[PCEP_OBJ_TLV_TYPE_SYMBOLIC_PATH_NAME] =
pcep_encode_tlv_symbolic_path_name;
tlv_encoders[PCEP_OBJ_TLV_TYPE_IPV4_LSP_IDENTIFIERS] =
pcep_encode_tlv_ipv4_lsp_identifiers;
tlv_encoders[PCEP_OBJ_TLV_TYPE_IPV6_LSP_IDENTIFIERS] =
pcep_encode_tlv_ipv6_lsp_identifiers;
tlv_encoders[PCEP_OBJ_TLV_TYPE_LSP_ERROR_CODE] =
pcep_encode_tlv_lsp_error_code;
tlv_encoders[PCEP_OBJ_TLV_TYPE_RSVP_ERROR_SPEC] =
pcep_encode_tlv_rsvp_error_spec;
tlv_encoders[PCEP_OBJ_TLV_TYPE_LSP_DB_VERSION] =
pcep_encode_tlv_lsp_db_version;
tlv_encoders[PCEP_OBJ_TLV_TYPE_SPEAKER_ENTITY_ID] =
pcep_encode_tlv_speaker_entity_id;
tlv_encoders[PCEP_OBJ_TLV_TYPE_SR_PCE_CAPABILITY] =
pcep_encode_tlv_sr_pce_capability;
tlv_encoders[PCEP_OBJ_TLV_TYPE_PATH_SETUP_TYPE] =
pcep_encode_tlv_path_setup_type;
tlv_encoders[PCEP_OBJ_TLV_TYPE_PATH_SETUP_TYPE_CAPABILITY] =
pcep_encode_tlv_path_setup_type_capability;
tlv_encoders[PCEP_OBJ_TLV_TYPE_SRPOLICY_POL_ID] =
pcep_encode_tlv_pol_id;
tlv_encoders[PCEP_OBJ_TLV_TYPE_SRPOLICY_POL_NAME] =
pcep_encode_tlv_pol_name;
tlv_encoders[PCEP_OBJ_TLV_TYPE_SRPOLICY_CPATH_ID] =
pcep_encode_tlv_cpath_id;
tlv_encoders[PCEP_OBJ_TLV_TYPE_SRPOLICY_CPATH_PREFERENCE] =
pcep_encode_tlv_cpath_preference;
tlv_encoders[PCEP_OBJ_TLV_TYPE_VENDOR_INFO] =
pcep_encode_tlv_vendor_info; tlv_encoders[PCEP_OBJ_TLV_TYPE_ARBITRARY] =
pcep_encode_tlv_arbitrary;
tlv_encoders[PCEP_OBJ_TLV_TYPE_OBJECTIVE_FUNCTION_LIST] =
pcep_encode_tlv_of_list;
*/
/* Decoders */
/*
memset(tlv_decoders, 0, sizeof(tlv_decoder_funcptr) *
MAX_TLV_ENCODER_INDEX); tlv_decoders[PCEP_OBJ_TLV_TYPE_NO_PATH_VECTOR] =
pcep_decode_tlv_no_path_vector;
tlv_decoders[PCEP_OBJ_TLV_TYPE_STATEFUL_PCE_CAPABILITY] =
pcep_decode_tlv_stateful_pce_capability;
tlv_decoders[PCEP_OBJ_TLV_TYPE_SYMBOLIC_PATH_NAME] =
pcep_decode_tlv_symbolic_path_name;
tlv_decoders[PCEP_OBJ_TLV_TYPE_IPV4_LSP_IDENTIFIERS] =
pcep_decode_tlv_ipv4_lsp_identifiers;
tlv_decoders[PCEP_OBJ_TLV_TYPE_IPV6_LSP_IDENTIFIERS] =
pcep_decode_tlv_ipv6_lsp_identifiers;
tlv_decoders[PCEP_OBJ_TLV_TYPE_LSP_ERROR_CODE] =
pcep_decode_tlv_lsp_error_code;
tlv_decoders[PCEP_OBJ_TLV_TYPE_RSVP_ERROR_SPEC] =
pcep_decode_tlv_rsvp_error_spec;
tlv_decoders[PCEP_OBJ_TLV_TYPE_LSP_DB_VERSION] =
pcep_decode_tlv_lsp_db_version;
tlv_decoders[PCEP_OBJ_TLV_TYPE_SPEAKER_ENTITY_ID] =
pcep_decode_tlv_speaker_entity_id;
tlv_decoders[PCEP_OBJ_TLV_TYPE_SR_PCE_CAPABILITY] =
pcep_decode_tlv_sr_pce_capability;
tlv_decoders[PCEP_OBJ_TLV_TYPE_PATH_SETUP_TYPE] =
pcep_decode_tlv_path_setup_type;
tlv_decoders[PCEP_OBJ_TLV_TYPE_PATH_SETUP_TYPE_CAPABILITY] =
pcep_decode_tlv_path_setup_type_capability;
tlv_decoders[PCEP_OBJ_TLV_TYPE_SRPOLICY_POL_ID] =
pcep_decode_tlv_pol_id;
tlv_decoders[PCEP_OBJ_TLV_TYPE_SRPOLICY_POL_NAME] =
pcep_decode_tlv_pol_name;
tlv_decoders[PCEP_OBJ_TLV_TYPE_SRPOLICY_CPATH_ID] =
pcep_decode_tlv_cpath_id;
tlv_decoders[PCEP_OBJ_TLV_TYPE_SRPOLICY_CPATH_PREFERENCE] =
pcep_decode_tlv_cpath_preference;
tlv_decoders[PCEP_OBJ_TLV_TYPE_VENDOR_INFO] =
pcep_decode_tlv_vendor_info; tlv_decoders[PCEP_OBJ_TLV_TYPE_ARBITRARY] =
pcep_decode_tlv_arbitrary;
tlv_decoders[PCEP_OBJ_TLV_TYPE_OBJECTIVE_FUNCTION_LIST] =
pcep_decode_tlv_of_list;
*/
}
uint16_t pcep_encode_tlv(struct pcep_object_tlv_header *tlv_hdr,
struct pcep_versioning *versioning, uint8_t *buf)
{
initialize_tlv_coders();
if (tlv_hdr->type >= MAX_TLV_ENCODER_INDEX) {
pcep_log(LOG_INFO,
"%s: Cannot encode unknown Object class [%d]",
__func__, tlv_hdr->type);
return 0;
}
tlv_encoder_funcptr tlv_encoder = tlv_encoders[tlv_hdr->type];
if (tlv_encoder == NULL) {
pcep_log(LOG_INFO,
"%s: No object encoder found for Object class [%d]",
__func__, tlv_hdr->type);
return 0;
}
/* Notice: The length in the TLV header does not include the TLV header,
* so the length returned from the tlv_encoder() is only the TLV body.
*/
uint16_t tlv_length =
tlv_encoder(tlv_hdr, versioning, buf + TLV_HEADER_LENGTH);
write_tlv_header(tlv_hdr, tlv_length, versioning, buf);
tlv_hdr->encoded_tlv = buf;
tlv_hdr->encoded_tlv_length = tlv_length;
return normalize_pcep_tlv_length(tlv_length + TLV_HEADER_LENGTH);
}
/* TLV Header format
*
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Type (2 bytes) | Length (2 bytes) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Value (Variable) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
void write_tlv_header(struct pcep_object_tlv_header *tlv_hdr,
uint16_t tlv_length, struct pcep_versioning *versioning,
uint8_t *buf)
{
(void)versioning;
uint16_t *uint16_ptr = (uint16_t *)buf;
uint16_ptr[0] = htons(tlv_hdr->type);
uint16_ptr[1] = htons(tlv_length);
}
/*
* Functions to encode TLVs
*/
uint16_t pcep_encode_tlv_no_path_vector(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
(void)versioning;
struct pcep_object_tlv_nopath_vector *nopath_tlv =
(struct pcep_object_tlv_nopath_vector *)tlv;
uint32_t *uint32_ptr = (uint32_t *)tlv_body_buf;
*uint32_ptr = htonl(nopath_tlv->error_code);
return LENGTH_1WORD;
}
uint16_t
pcep_encode_tlv_stateful_pce_capability(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
(void)versioning;
struct pcep_object_tlv_stateful_pce_capability *spc_tlv =
(struct pcep_object_tlv_stateful_pce_capability *)tlv;
tlv_body_buf[3] =
((spc_tlv->flag_f_triggered_initial_sync == true
? TLV_STATEFUL_PCE_CAP_FLAG_F
: 0x00)
| (spc_tlv->flag_d_delta_lsp_sync == true
? TLV_STATEFUL_PCE_CAP_FLAG_D
: 0x00)
| (spc_tlv->flag_t_triggered_resync == true
? TLV_STATEFUL_PCE_CAP_FLAG_T
: 0x00)
| (spc_tlv->flag_i_lsp_instantiation_capability == true
? TLV_STATEFUL_PCE_CAP_FLAG_I
: 0x00)
| (spc_tlv->flag_s_include_db_version == true
? TLV_STATEFUL_PCE_CAP_FLAG_S
: 0x00)
| (spc_tlv->flag_u_lsp_update_capability == true
? TLV_STATEFUL_PCE_CAP_FLAG_U
: 0x00));
return LENGTH_1WORD;
}
uint16_t pcep_encode_tlv_symbolic_path_name(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
(void)versioning;
struct pcep_object_tlv_symbolic_path_name *spn_tlv =
(struct pcep_object_tlv_symbolic_path_name *)tlv;
memcpy(tlv_body_buf, spn_tlv->symbolic_path_name,
spn_tlv->symbolic_path_name_length);
return spn_tlv->symbolic_path_name_length;
}
uint16_t
pcep_encode_tlv_ipv4_lsp_identifiers(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
(void)versioning;
struct pcep_object_tlv_ipv4_lsp_identifier *ipv4_lsp =
(struct pcep_object_tlv_ipv4_lsp_identifier *)tlv;
uint32_t *uint32_ptr = (uint32_t *)tlv_body_buf;
uint32_ptr[0] = ipv4_lsp->ipv4_tunnel_sender.s_addr;
/* uint32_t[1] is lsp_id and tunnel_id, below */
uint32_ptr[2] = ipv4_lsp->extended_tunnel_id.s_addr;
uint32_ptr[3] = ipv4_lsp->ipv4_tunnel_endpoint.s_addr;
uint16_t *uint16_ptr = (uint16_t *)(tlv_body_buf + LENGTH_1WORD);
uint16_ptr[0] = htons(ipv4_lsp->lsp_id);
uint16_ptr[1] = htons(ipv4_lsp->tunnel_id);
return LENGTH_4WORDS;
}
uint16_t
pcep_encode_tlv_ipv6_lsp_identifiers(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
(void)versioning;
struct pcep_object_tlv_ipv6_lsp_identifier *ipv6_lsp =
(struct pcep_object_tlv_ipv6_lsp_identifier *)tlv;
uint32_t *uint32_ptr = (uint32_t *)tlv_body_buf;
encode_ipv6(&ipv6_lsp->ipv6_tunnel_sender, uint32_ptr);
encode_ipv6(&ipv6_lsp->extended_tunnel_id, uint32_ptr + 5);
encode_ipv6(&ipv6_lsp->ipv6_tunnel_endpoint, uint32_ptr + 9);
uint16_t *uint16_ptr = (uint16_t *)(tlv_body_buf + LENGTH_4WORDS);
uint16_ptr[0] = htons(ipv6_lsp->lsp_id);
uint16_ptr[1] = htons(ipv6_lsp->tunnel_id);
return LENGTH_13WORDS;
}
uint16_t pcep_encode_tlv_lsp_error_code(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
(void)versioning;
struct pcep_object_tlv_lsp_error_code *lsp_error_tlv =
(struct pcep_object_tlv_lsp_error_code *)tlv;
uint32_t *uint32_ptr = (uint32_t *)tlv_body_buf;
*uint32_ptr = htonl(lsp_error_tlv->lsp_error_code);
return LENGTH_1WORD;
}
uint16_t pcep_encode_tlv_rsvp_error_spec(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
/* Same decode tlv function for both types:
pcep_create_tlv_rsvp_ipv4_error_spec(tlv);
pcep_create_tlv_rsvp_ipv6_error_spec(tlv); */
/* RSVP Object Header
*
* 0 1 2 3
* +-------------+-------------+-------------+-------------+
* | Length (bytes) | Class-Num | C-Type |
* +-------------+-------------+-------------+-------------+
* | |
* // (Object contents) //
* | |
* +-------------+-------------+-------------+-------------+
*
* IPv4 ERROR_SPEC object: Class = 6, C-Type = 1
* +-------------+-------------+-------------+-------------+
* | IPv4 Error Node Address (4 bytes) |
* +-------------+-------------+-------------+-------------+
* | Flags | Error Code | Error Value |
* +-------------+-------------+-------------+-------------+
*
* IPv6 ERROR_SPEC object: Class = 6, C-Type = 2
* +-------------+-------------+-------------+-------------+
* | IPv6 Error Node Address (16 bytes) |
* +-------------+-------------+-------------+-------------+
* | Flags | Error Code | Error Value |
* +-------------+-------------+-------------+-------------+
*/
(void)versioning;
struct pcep_object_tlv_rsvp_error_spec *rsvp_hdr =
(struct pcep_object_tlv_rsvp_error_spec *)tlv;
tlv_body_buf[2] = rsvp_hdr->class_num;
tlv_body_buf[3] = rsvp_hdr->c_type;
uint16_t *length_ptr = (uint16_t *)tlv_body_buf;
uint32_t *uint32_ptr = (uint32_t *)(tlv_body_buf + LENGTH_1WORD);
if (rsvp_hdr->c_type == RSVP_ERROR_SPEC_IPV4_CTYPE) {
*length_ptr = htons(LENGTH_3WORDS);
*uint32_ptr =
rsvp_hdr->error_spec_ip.ipv4_error_node_address.s_addr;
tlv_body_buf[LENGTH_2WORDS + 1] = rsvp_hdr->error_code;
uint16_t *uint16_ptr =
(uint16_t *)(tlv_body_buf + LENGTH_2WORDS + 2);
*uint16_ptr = htons(rsvp_hdr->error_value);
return LENGTH_3WORDS;
} else if (rsvp_hdr->c_type == RSVP_ERROR_SPEC_IPV6_CTYPE) {
*length_ptr = htons(LENGTH_6WORDS);
encode_ipv6(&rsvp_hdr->error_spec_ip.ipv6_error_node_address,
uint32_ptr);
tlv_body_buf[LENGTH_5WORDS + 1] = rsvp_hdr->error_code;
uint16_t *uint16_ptr =
(uint16_t *)(tlv_body_buf + LENGTH_5WORDS + 2);
*uint16_ptr = htons(rsvp_hdr->error_value);
return LENGTH_6WORDS;
}
return 0;
}
uint16_t pcep_encode_tlv_lsp_db_version(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
(void)versioning;
struct pcep_object_tlv_lsp_db_version *lsp_db_ver =
(struct pcep_object_tlv_lsp_db_version *)tlv;
*((uint64_t *)tlv_body_buf) = htobe64(lsp_db_ver->lsp_db_version);
return LENGTH_2WORDS;
}
uint16_t pcep_encode_tlv_speaker_entity_id(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
(void)versioning;
struct pcep_object_tlv_speaker_entity_identifier *speaker_id =
(struct pcep_object_tlv_speaker_entity_identifier *)tlv;
if (speaker_id->speaker_entity_id_list == NULL) {
return 0;
}
int index = 0;
uint32_t *uint32_ptr = (uint32_t *)tlv_body_buf;
double_linked_list_node *node =
speaker_id->speaker_entity_id_list->head;
for (; node != NULL; node = node->next_node) {
uint32_ptr[index++] = htonl(*((uint32_t *)node->data));
}
return speaker_id->speaker_entity_id_list->num_entries * LENGTH_1WORD;
}
uint16_t pcep_encode_tlv_sr_pce_capability(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
(void)versioning;
struct pcep_object_tlv_sr_pce_capability *sr_pce_cap =
(struct pcep_object_tlv_sr_pce_capability *)tlv;
tlv_body_buf[2] =
((sr_pce_cap->flag_n == true ? TLV_SR_PCE_CAP_FLAG_N : 0x00)
| (sr_pce_cap->flag_x == true ? TLV_SR_PCE_CAP_FLAG_X : 0x00));
tlv_body_buf[3] = sr_pce_cap->max_sid_depth;
return LENGTH_1WORD;
}
uint16_t pcep_encode_tlv_path_setup_type(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
(void)versioning;
struct pcep_object_tlv_path_setup_type *pst =
(struct pcep_object_tlv_path_setup_type *)tlv;
tlv_body_buf[3] = pst->path_setup_type;
return LENGTH_1WORD;
}
uint16_t
pcep_encode_tlv_path_setup_type_capability(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
(void)versioning;
struct pcep_object_tlv_path_setup_type_capability *pst_cap =
(struct pcep_object_tlv_path_setup_type_capability *)tlv;
if (pst_cap->pst_list == NULL) {
return 0;
}
tlv_body_buf[3] = pst_cap->pst_list->num_entries;
/* Index past the reserved and NumPSTs fields */
int index = 4;
double_linked_list_node *node = pst_cap->pst_list->head;
for (; node != NULL; node = node->next_node) {
tlv_body_buf[index++] = *((uint8_t *)node->data);
}
uint16_t pst_length = normalize_pcep_tlv_length(
LENGTH_1WORD + pst_cap->pst_list->num_entries);
if (pst_cap->sub_tlv_list == NULL) {
return pst_length;
}
/* Any padding used for the PSTs should not be included in the tlv
* header length */
index = normalize_pcep_tlv_length(index);
uint16_t sub_tlvs_length = 0;
node = pst_cap->sub_tlv_list->head;
for (; node != NULL; node = node->next_node) {
struct pcep_object_tlv_header *sub_tlv =
(struct pcep_object_tlv_header *)node->data;
uint16_t sub_tlv_length = pcep_encode_tlv(sub_tlv, versioning,
tlv_body_buf + index);
index += sub_tlv_length;
sub_tlvs_length += sub_tlv_length;
}
return sub_tlvs_length + pst_length;
}
uint16_t pcep_encode_tlv_pol_id(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
(void)versioning;
uint32_t *uint32_ptr = (uint32_t *)tlv_body_buf;
struct pcep_object_tlv_srpag_pol_id *ipv4 =
(struct pcep_object_tlv_srpag_pol_id *)tlv;
if (ipv4->is_ipv4) {
uint32_ptr[0] = htonl(ipv4->color);
uint32_ptr[1] = ipv4->end_point.ipv4.s_addr;
return LENGTH_2WORDS;
} else {
struct pcep_object_tlv_srpag_pol_id *ipv6 =
(struct pcep_object_tlv_srpag_pol_id *)tlv;
uint32_ptr[0] = htonl(ipv6->color);
encode_ipv6(&ipv6->end_point.ipv6, &uint32_ptr[1]);
return LENGTH_5WORDS;
}
}
uint16_t pcep_encode_tlv_pol_name(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
(void)versioning;
struct pcep_object_tlv_srpag_pol_name *pol_name_tlv =
(struct pcep_object_tlv_srpag_pol_name *)tlv;
memcpy(tlv_body_buf, pol_name_tlv->name, pol_name_tlv->name_length);
return normalize_pcep_tlv_length(pol_name_tlv->name_length);
}
uint16_t pcep_encode_tlv_cpath_id(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
(void)versioning;
struct pcep_object_tlv_srpag_cp_id *cpath_id_tlv =
(struct pcep_object_tlv_srpag_cp_id *)tlv;
uint32_t *uint32_ptr = (uint32_t *)tlv_body_buf;
tlv_body_buf[0] = cpath_id_tlv->proto;
uint32_ptr[1] = htonl(cpath_id_tlv->orig_asn);
encode_ipv6(&cpath_id_tlv->orig_addres, &uint32_ptr[2]);
uint32_ptr[6] = htonl(cpath_id_tlv->discriminator);
return sizeof(cpath_id_tlv->proto) + sizeof(cpath_id_tlv->orig_asn)
+ sizeof(cpath_id_tlv->orig_addres)
+ sizeof(cpath_id_tlv->discriminator);
}
uint16_t pcep_encode_tlv_cpath_preference(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
(void)versioning;
struct pcep_object_tlv_srpag_cp_pref *cpath_pref_tlv =
(struct pcep_object_tlv_srpag_cp_pref *)tlv;
uint32_t *uint32_ptr = (uint32_t *)tlv_body_buf;
uint32_ptr[0] = htonl(cpath_pref_tlv->preference);
return sizeof(cpath_pref_tlv->preference);
}
uint16_t pcep_encode_tlv_vendor_info(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
(void)versioning;
struct pcep_object_tlv_vendor_info *vendor_info =
(struct pcep_object_tlv_vendor_info *)tlv;
uint32_t *uint32_ptr = (uint32_t *)tlv_body_buf;
uint32_ptr[0] = htonl(vendor_info->enterprise_number);
uint32_ptr[1] = htonl(vendor_info->enterprise_specific_info);
return LENGTH_2WORDS;
}
uint16_t pcep_encode_tlv_arbitrary(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
(void)versioning;
struct pcep_object_tlv_arbitrary *tlv_arbitrary =
(struct pcep_object_tlv_arbitrary *)tlv;
memcpy(tlv_body_buf, tlv_arbitrary->data, tlv_arbitrary->data_length);
tlv->type = tlv_arbitrary->arbitraty_type;
return tlv_arbitrary->data_length;
}
uint16_t pcep_encode_tlv_of_list(struct pcep_object_tlv_header *tlv,
struct pcep_versioning *versioning,
uint8_t *tlv_body_buf)
{
(void)versioning;
struct pcep_object_tlv_of_list *of_list =
(struct pcep_object_tlv_of_list *)tlv;
if (of_list->of_list == NULL) {
return 0;
}
int index = 0;
double_linked_list_node *node = of_list->of_list->head;
while (node != NULL) {
uint16_t *of_code = (uint16_t *)node->data;
if (of_code == NULL) {
return 0;
}
uint16_t *uint16_ptr = (uint16_t *)(tlv_body_buf + index);
*uint16_ptr = *of_code;
index += 2;
node = node->next_node;
}
return of_list->of_list->num_entries * 2;
}
/*
* Decoding functions
*/
void pcep_decode_tlv_hdr(const uint8_t *tlv_buf,
struct pcep_object_tlv_header *tlv_hdr)
{
memset(tlv_hdr, 0, sizeof(struct pcep_object_tlv_header));
uint16_t *uint16_ptr = (uint16_t *)tlv_buf;
tlv_hdr->type = ntohs(uint16_ptr[0]);
tlv_hdr->encoded_tlv_length = ntohs(uint16_ptr[1]);
tlv_hdr->encoded_tlv = tlv_buf;
}
struct pcep_object_tlv_header *pcep_decode_tlv(const uint8_t *tlv_buf)
{
initialize_tlv_coders();
struct pcep_object_tlv_header tlv_hdr;
/* Only initializes and decodes the Object Header: class, type, flags,
* and length */
pcep_decode_tlv_hdr(tlv_buf, &tlv_hdr);
if (tlv_hdr.type >= MAX_TLV_ENCODER_INDEX) {
pcep_log(LOG_INFO, "%s: Cannot decode unknown TLV type [%d]",
__func__, tlv_hdr.type);
return NULL;
}
tlv_decoder_funcptr tlv_decoder = NULL;
if (tlv_hdr.type == PCEP_OBJ_TYPE_CISCO_BSID) {
pcep_log(LOG_INFO,
"%s: Cisco BSID TLV decoder found for TLV type [%d]",
__func__, tlv_hdr.type);
tlv_decoder = tlv_decoders[PCEP_OBJ_TLV_TYPE_ARBITRARY];
} else {
tlv_decoder = tlv_decoders[tlv_hdr.type];
}
if (tlv_decoder == NULL) {
pcep_log(LOG_INFO, "%s: No TLV decoder found for TLV type [%d]",
__func__, tlv_hdr.type);
return NULL;
}
return tlv_decoder(&tlv_hdr, tlv_buf + LENGTH_1WORD);
}
static struct pcep_object_tlv_header *
common_tlv_create(struct pcep_object_tlv_header *hdr, uint16_t new_tlv_length)
{
struct pcep_object_tlv_header *new_tlv =
pceplib_malloc(PCEPLIB_MESSAGES, new_tlv_length);
memset(new_tlv, 0, new_tlv_length);
memcpy(new_tlv, hdr, sizeof(struct pcep_object_tlv_header));
return new_tlv;
}
struct pcep_object_tlv_header *
pcep_decode_tlv_no_path_vector(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf)
{
struct pcep_object_tlv_nopath_vector *tlv =
(struct pcep_object_tlv_nopath_vector *)common_tlv_create(
tlv_hdr, sizeof(struct pcep_object_tlv_nopath_vector));
tlv->error_code = ntohl(*((uint32_t *)tlv_body_buf));
return (struct pcep_object_tlv_header *)tlv;
}
struct pcep_object_tlv_header *
pcep_decode_tlv_stateful_pce_capability(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf)
{
struct pcep_object_tlv_stateful_pce_capability *tlv =
(struct pcep_object_tlv_stateful_pce_capability *)
common_tlv_create(
tlv_hdr,
sizeof(struct
pcep_object_tlv_stateful_pce_capability));
tlv->flag_f_triggered_initial_sync =
(tlv_body_buf[3] & TLV_STATEFUL_PCE_CAP_FLAG_F);
tlv->flag_d_delta_lsp_sync =
(tlv_body_buf[3] & TLV_STATEFUL_PCE_CAP_FLAG_D);
tlv->flag_t_triggered_resync =
(tlv_body_buf[3] & TLV_STATEFUL_PCE_CAP_FLAG_T);
tlv->flag_i_lsp_instantiation_capability =
(tlv_body_buf[3] & TLV_STATEFUL_PCE_CAP_FLAG_I);
tlv->flag_s_include_db_version =
(tlv_body_buf[3] & TLV_STATEFUL_PCE_CAP_FLAG_S);
tlv->flag_u_lsp_update_capability =
(tlv_body_buf[3] & TLV_STATEFUL_PCE_CAP_FLAG_U);
return (struct pcep_object_tlv_header *)tlv;
}
struct pcep_object_tlv_header *
pcep_decode_tlv_symbolic_path_name(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf)
{
struct pcep_object_tlv_symbolic_path_name *tlv =
(struct pcep_object_tlv_symbolic_path_name *)common_tlv_create(
tlv_hdr,
sizeof(struct pcep_object_tlv_symbolic_path_name));
uint16_t length = tlv_hdr->encoded_tlv_length;
if (length > MAX_SYMBOLIC_PATH_NAME) {
/* TODO should we also reset the tlv_hdr->encoded_tlv_length ?
*/
length = MAX_SYMBOLIC_PATH_NAME;
pcep_log(
LOG_INFO,
"%s: Decoding Symbolic Path Name TLV, truncate path name from [%d] to [%d].\",",
__func__, tlv_hdr->encoded_tlv_length,
MAX_SYMBOLIC_PATH_NAME);
}
tlv->symbolic_path_name_length = length;
memcpy(tlv->symbolic_path_name, tlv_body_buf, length);
return (struct pcep_object_tlv_header *)tlv;
}
struct pcep_object_tlv_header *
pcep_decode_tlv_ipv4_lsp_identifiers(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf)
{
struct pcep_object_tlv_ipv4_lsp_identifier *tlv =
(struct pcep_object_tlv_ipv4_lsp_identifier *)common_tlv_create(
tlv_hdr,
sizeof(struct pcep_object_tlv_ipv4_lsp_identifier));
uint32_t *uint32_ptr = (uint32_t *)tlv_body_buf;
tlv->ipv4_tunnel_sender.s_addr = uint32_ptr[0];
/* uint32_t[1] is lsp_id and tunnel_id, below */
tlv->extended_tunnel_id.s_addr = uint32_ptr[2];
tlv->ipv4_tunnel_endpoint.s_addr = uint32_ptr[3];
uint16_t *uint16_ptr = (uint16_t *)(tlv_body_buf + LENGTH_1WORD);
tlv->lsp_id = ntohs(uint16_ptr[0]);
tlv->tunnel_id = ntohs(uint16_ptr[1]);
return (struct pcep_object_tlv_header *)tlv;
}
struct pcep_object_tlv_header *
pcep_decode_tlv_ipv6_lsp_identifiers(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf)
{
struct pcep_object_tlv_ipv6_lsp_identifier *tlv =
(struct pcep_object_tlv_ipv6_lsp_identifier *)common_tlv_create(
tlv_hdr,
sizeof(struct pcep_object_tlv_ipv6_lsp_identifier));
uint32_t *uint32_ptr = (uint32_t *)tlv_body_buf;
decode_ipv6(uint32_ptr, &tlv->ipv6_tunnel_sender);
decode_ipv6(uint32_ptr + 5, &tlv->extended_tunnel_id);
decode_ipv6(uint32_ptr + 9, &tlv->ipv6_tunnel_endpoint);
uint16_t *uint16_ptr = (uint16_t *)(tlv_body_buf + LENGTH_4WORDS);
tlv->lsp_id = htons(uint16_ptr[0]);
tlv->tunnel_id = htons(uint16_ptr[1]);
return (struct pcep_object_tlv_header *)tlv;
}
struct pcep_object_tlv_header *
pcep_decode_tlv_lsp_error_code(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf)
{
struct pcep_object_tlv_lsp_error_code *tlv =
(struct pcep_object_tlv_lsp_error_code *)common_tlv_create(
tlv_hdr, sizeof(struct pcep_object_tlv_lsp_error_code));
tlv->lsp_error_code = ntohl(*((uint32_t *)tlv_body_buf));
return (struct pcep_object_tlv_header *)tlv;
}
struct pcep_object_tlv_header *
pcep_decode_tlv_rsvp_error_spec(struct pcep_object_tlv_header *tlv_hdr,
const uint8_t *tlv_body_buf)
{
uint8_t class_num = tlv_body_buf[2];
uint8_t ctype = tlv_body_buf[3];
if (class_num != RSVP_ERROR_SPEC_CLASS_NUM) {
pcep_log(
LOG_INFO,
"%s: Decoding RSVP Error Spec TLV, unknown class num [%d]",
__func__, class_num);
return NULL;
}
if (ctype != RSVP_ERROR_SPEC_IPV4_CTYPE
&& ctype != RSVP_ERROR_SPEC_IPV6_CTYPE) {
pcep_log(LOG_INFO,
"%s: Decoding RSVP Error Spec TLV, unknown ctype [%d]",
__func__, ctype);