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frr/pceplib/pcep_msg_objects_encoding.c

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Adding upstream version 10.1.1. Signed-off-by: Daniel Baumann <daniel@debian.org>
2025-02-05 10:03:58 +01:00
// 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 Objects.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include "pcep_msg_objects.h"
#include "pcep_msg_encoding.h"
#include "pcep_utils_logging.h"
#include "pcep_utils_memory.h"
void write_object_header(struct pcep_object_header *object_hdr,
uint16_t object_length, uint8_t *buf);
void pcep_decode_object_hdr(const uint8_t *obj_buf,
struct pcep_object_header *obj_hdr);
void set_ro_subobj_fields(struct pcep_object_ro_subobj *subobj, bool flag_l,
uint8_t subobj_type);
/*
* forward declarations for initialize_object_encoders()
*/
uint16_t pcep_encode_obj_open(struct pcep_object_header *obj,
struct pcep_versioning *versioning, uint8_t *buf);
uint16_t pcep_encode_obj_rp(struct pcep_object_header *obj,
struct pcep_versioning *versioning, uint8_t *buf);
uint16_t pcep_encode_obj_nopath(struct pcep_object_header *obj,
struct pcep_versioning *versioning,
uint8_t *buf);
uint16_t pcep_encode_obj_endpoints(struct pcep_object_header *obj,
struct pcep_versioning *versioning,
uint8_t *buf);
uint16_t pcep_encode_obj_association(struct pcep_object_header *obj,
struct pcep_versioning *versioning,
uint8_t *buf);
uint16_t pcep_encode_obj_bandwidth(struct pcep_object_header *obj,
struct pcep_versioning *versioning,
uint8_t *buf);
uint16_t pcep_encode_obj_metric(struct pcep_object_header *obj,
struct pcep_versioning *versioning,
uint8_t *buf);
uint16_t pcep_encode_obj_ro(struct pcep_object_header *obj,
struct pcep_versioning *versioning, uint8_t *buf);
uint16_t pcep_encode_obj_lspa(struct pcep_object_header *obj,
struct pcep_versioning *versioning, uint8_t *buf);
uint16_t pcep_encode_obj_svec(struct pcep_object_header *obj,
struct pcep_versioning *versioning, uint8_t *buf);
uint16_t pcep_encode_obj_notify(struct pcep_object_header *obj,
struct pcep_versioning *versioning,
uint8_t *buf);
uint16_t pcep_encode_obj_error(struct pcep_object_header *error,
struct pcep_versioning *versioning,
uint8_t *buf);
uint16_t pcep_encode_obj_close(struct pcep_object_header *close,
struct pcep_versioning *versioning,
uint8_t *buf);
uint16_t pcep_encode_obj_srp(struct pcep_object_header *obj,
struct pcep_versioning *versioning, uint8_t *buf);
uint16_t pcep_encode_obj_lsp(struct pcep_object_header *obj,
struct pcep_versioning *versioning, uint8_t *buf);
uint16_t pcep_encode_obj_vendor_info(struct pcep_object_header *obj,
struct pcep_versioning *versioning,
uint8_t *buf);
uint16_t pcep_encode_obj_inter_layer(struct pcep_object_header *obj,
struct pcep_versioning *versioning,
uint8_t *buf);
uint16_t pcep_encode_obj_switch_layer(struct pcep_object_header *obj,
struct pcep_versioning *versioning,
uint8_t *buf);
uint16_t pcep_encode_obj_req_adap_cap(struct pcep_object_header *obj,
struct pcep_versioning *versioning,
uint8_t *buf);
uint16_t pcep_encode_obj_server_ind(struct pcep_object_header *obj,
struct pcep_versioning *versioning,
uint8_t *buf);
uint16_t pcep_encode_obj_objective_function(struct pcep_object_header *obj,
struct pcep_versioning *versioning,
uint8_t *buf);
typedef uint16_t (*object_encoder_funcptr)(struct pcep_object_header *,
struct pcep_versioning *versioning,
uint8_t *buf);
#define MAX_OBJECT_ENCODER_INDEX 64
#define PCEP_ENCODERS_ARGS \
struct pcep_object_header *, struct pcep_versioning *versioning, \
uint8_t *buf
uint16_t (*const object_encoders[MAX_OBJECT_ENCODER_INDEX])(
PCEP_ENCODERS_ARGS) = {
[PCEP_OBJ_CLASS_OPEN] = pcep_encode_obj_open,
[PCEP_OBJ_CLASS_RP] = pcep_encode_obj_rp,
[PCEP_OBJ_CLASS_NOPATH] = pcep_encode_obj_nopath,
[PCEP_OBJ_CLASS_ENDPOINTS] = pcep_encode_obj_endpoints,
[PCEP_OBJ_CLASS_BANDWIDTH] = pcep_encode_obj_bandwidth,
[PCEP_OBJ_CLASS_METRIC] = pcep_encode_obj_metric,
[PCEP_OBJ_CLASS_ERO] = pcep_encode_obj_ro,
[PCEP_OBJ_CLASS_RRO] = pcep_encode_obj_ro,
[PCEP_OBJ_CLASS_LSPA] = pcep_encode_obj_lspa,
[PCEP_OBJ_CLASS_IRO] = pcep_encode_obj_ro,
[PCEP_OBJ_CLASS_SVEC] = pcep_encode_obj_svec,
[PCEP_OBJ_CLASS_NOTF] = pcep_encode_obj_notify,
[PCEP_OBJ_CLASS_ERROR] = pcep_encode_obj_error,
[PCEP_OBJ_CLASS_CLOSE] = pcep_encode_obj_close,
[PCEP_OBJ_CLASS_LSP] = pcep_encode_obj_lsp,
[PCEP_OBJ_CLASS_SRP] = pcep_encode_obj_srp,
[PCEP_OBJ_CLASS_ASSOCIATION] = pcep_encode_obj_association,
[PCEP_OBJ_CLASS_INTER_LAYER] = pcep_encode_obj_inter_layer,
[PCEP_OBJ_CLASS_SWITCH_LAYER] = pcep_encode_obj_switch_layer,
[PCEP_OBJ_CLASS_REQ_ADAP_CAP] = pcep_encode_obj_req_adap_cap,
[PCEP_OBJ_CLASS_SERVER_IND] = pcep_encode_obj_server_ind,
[PCEP_OBJ_CLASS_VENDOR_INFO] = pcep_encode_obj_vendor_info,
[PCEP_OBJ_CLASS_OF] = pcep_encode_obj_objective_function,
};
/*
* forward declarations for initialize_object_decoders()
*/
struct pcep_object_header *pcep_decode_obj_open(struct pcep_object_header *hdr,
const uint8_t *buf);
struct pcep_object_header *pcep_decode_obj_rp(struct pcep_object_header *hdr,
const uint8_t *buf);
struct pcep_object_header *
pcep_decode_obj_nopath(struct pcep_object_header *hdr, const uint8_t *buf);
struct pcep_object_header *
pcep_decode_obj_endpoints(struct pcep_object_header *hdr, const uint8_t *buf);
struct pcep_object_header *
pcep_decode_obj_association(struct pcep_object_header *hdr, const uint8_t *buf);
struct pcep_object_header *
pcep_decode_obj_bandwidth(struct pcep_object_header *hdr, const uint8_t *buf);
struct pcep_object_header *
pcep_decode_obj_metric(struct pcep_object_header *hdr, const uint8_t *buf);
struct pcep_object_header *pcep_decode_obj_ro(struct pcep_object_header *hdr,
const uint8_t *buf);
struct pcep_object_header *pcep_decode_obj_lspa(struct pcep_object_header *hdr,
const uint8_t *buf);
struct pcep_object_header *pcep_decode_obj_svec(struct pcep_object_header *hdr,
const uint8_t *buf);
struct pcep_object_header *
pcep_decode_obj_notify(struct pcep_object_header *hdr, const uint8_t *buf);
struct pcep_object_header *pcep_decode_obj_error(struct pcep_object_header *hdr,
const uint8_t *buf);
struct pcep_object_header *pcep_decode_obj_close(struct pcep_object_header *hdr,
const uint8_t *buf);
struct pcep_object_header *pcep_decode_obj_srp(struct pcep_object_header *hdr,
const uint8_t *buf);
struct pcep_object_header *pcep_decode_obj_lsp(struct pcep_object_header *hdr,
const uint8_t *buf);
struct pcep_object_header *
pcep_decode_obj_vendor_info(struct pcep_object_header *hdr, const uint8_t *buf);
struct pcep_object_header *
pcep_decode_obj_inter_layer(struct pcep_object_header *hdr, const uint8_t *buf);
struct pcep_object_header *
pcep_decode_obj_switch_layer(struct pcep_object_header *hdr,
const uint8_t *buf);
struct pcep_object_header *
pcep_decode_obj_req_adap_cap(struct pcep_object_header *hdr,
const uint8_t *buf);
struct pcep_object_header *
pcep_decode_obj_server_ind(struct pcep_object_header *hdr, const uint8_t *buf);
struct pcep_object_header *
pcep_decode_obj_objective_function(struct pcep_object_header *hdr,
const uint8_t *buf);
typedef struct pcep_object_header *(*object_decoder_funcptr)(
struct pcep_object_header *, const uint8_t *buf);
#define PCEP_DECODERS_ARGS struct pcep_object_header *, const uint8_t *buf
struct pcep_object_header *(*const object_decoders[MAX_OBJECT_ENCODER_INDEX])(
PCEP_DECODERS_ARGS) = {
[PCEP_OBJ_CLASS_OPEN] = pcep_decode_obj_open,
[PCEP_OBJ_CLASS_RP] = pcep_decode_obj_rp,
[PCEP_OBJ_CLASS_NOPATH] = pcep_decode_obj_nopath,
[PCEP_OBJ_CLASS_ENDPOINTS] = pcep_decode_obj_endpoints,
[PCEP_OBJ_CLASS_BANDWIDTH] = pcep_decode_obj_bandwidth,
[PCEP_OBJ_CLASS_METRIC] = pcep_decode_obj_metric,
[PCEP_OBJ_CLASS_ERO] = pcep_decode_obj_ro,
[PCEP_OBJ_CLASS_RRO] = pcep_decode_obj_ro,
[PCEP_OBJ_CLASS_LSPA] = pcep_decode_obj_lspa,
[PCEP_OBJ_CLASS_IRO] = pcep_decode_obj_ro,
[PCEP_OBJ_CLASS_SVEC] = pcep_decode_obj_svec,
[PCEP_OBJ_CLASS_NOTF] = pcep_decode_obj_notify,
[PCEP_OBJ_CLASS_ERROR] = pcep_decode_obj_error,
[PCEP_OBJ_CLASS_CLOSE] = pcep_decode_obj_close,
[PCEP_OBJ_CLASS_LSP] = pcep_decode_obj_lsp,
[PCEP_OBJ_CLASS_SRP] = pcep_decode_obj_srp,
[PCEP_OBJ_CLASS_ASSOCIATION] = pcep_decode_obj_association,
[PCEP_OBJ_CLASS_INTER_LAYER] = pcep_decode_obj_inter_layer,
[PCEP_OBJ_CLASS_SWITCH_LAYER] = pcep_decode_obj_switch_layer,
[PCEP_OBJ_CLASS_REQ_ADAP_CAP] = pcep_decode_obj_req_adap_cap,
[PCEP_OBJ_CLASS_SERVER_IND] = pcep_decode_obj_server_ind,
[PCEP_OBJ_CLASS_VENDOR_INFO] = pcep_decode_obj_vendor_info,
[PCEP_OBJ_CLASS_OF] = pcep_decode_obj_objective_function,
};
/* Object lengths, including the Object Header.
* Used by pcep_object_get_length() and pcep_object_has_tlvs() */
static uint8_t pcep_object_class_lengths[] = {
0, /* Object class 0 unused */
8, /* PCEP_OBJ_CLASS_OPEN = 1 */
12, /* PCEP_OBJ_CLASS_RP = 2 */
16, /* PCEP_OBJ_CLASS_NOPATH = 3, includes 8 for mandatory TLV */
0, /* PCEP_OBJ_CLASS_ENDPOINTS = 4, could be ipv4 or ipv6, setting to 0
*/
8, /* PCEP_OBJ_CLASS_BANDWIDTH = 5 */
12, /* PCEP_OBJ_CLASS_METRIC = 6 */
0, /* PCEP_OBJ_CLASS_ERO = 7, setting 0, ROs cannot have TLVs */
0, /* PCEP_OBJ_CLASS_RRO = 8, setting 0, ROs cannot have TLVs */
20, /* PCEP_OBJ_CLASS_LSPA = 9 */
0, /* PCEP_OBJ_CLASS_IRO = 10, setting 0, ROs cannot have TLVs */
0, /* PCEP_OBJ_CLASS_SVEC = 11, SVECs cannot have TLVs */
8, /* PCEP_OBJ_CLASS_NOTF = 12 */
8, /* PCEP_OBJ_CLASS_ERROR = 13 */
0, /* Object class 14 unused */
8, /* PCEP_OBJ_CLASS_CLOSE = 15 */
0, 0, 0, 0, 0, /* Object classes 16 - 20 are not used */
8, /* PCEP_OBJ_CLASS_OF = 21 */
0, 0, 0, 0, 0, /* Object classes 22 - 26 are not used */
0, 0, 0, 0, 0, /* Object classes 27 - 31 are not used */
8, /* PCEP_OBJ_CLASS_LSP = 32 */
12, /* PCEP_OBJ_CLASS_SRP = 33 */
12, /* PCEP_OBJ_CLASS_VENDOR_INFO = 34 */
0, /* Object class 35 unused */
0, /* PCEP_OBJ_CLASS_INTER_LAYER = 36, cannot have TLVs */
0, /* PCEP_OBJ_CLASS_SWITCH_LAYER = 37, cannot have TLVs */
0, /* PCEP_OBJ_CLASS_REQ_ADAP_CAP = 38, cannot have TLVs*/
8, /* PCEP_OBJ_CLASS_SERVER_IND = 39 */
0, /* PCEP_OBJ_CLASS_ASSOCIATION = 40, cannot have TLVs */
};
/*
* The TLVs can have strange length values, since they do not include padding in
* the TLV header length, but that extra padding must be taken into account by
* the enclosing object by rounding up to the next 4 byte boundary.
* Example returned lengths:
* normalize_length(4) = 4, normalize_length(5) = 8, normalize_length(6)
* = 8, normalize_length(7) = 8, normalize_length(8) = 8
* normalize_length(9) = 12, normalize_length(10) = 12, normalize_length(11) =
* 12, normalize_length(12) = 12, normalize_length(13) = 13...
*/
uint16_t normalize_pcep_tlv_length(uint16_t length)
{
return (length % 4 == 0) ? length : (length + (4 - (length % 4)));
}
/*
* Encoding functions
*/
uint16_t pcep_encode_object(struct pcep_object_header *object_hdr,
struct pcep_versioning *versioning, uint8_t *buf)
{
if (object_hdr->object_class >= MAX_OBJECT_ENCODER_INDEX) {
pcep_log(LOG_INFO,
"%s: Cannot encode unknown Object class [%d]",
__func__, object_hdr->object_class);
return 0;
}
object_encoder_funcptr obj_encoder =
object_encoders[object_hdr->object_class];
if (obj_encoder == NULL) {
pcep_log(LOG_INFO,
"%s: No object encoder found for Object class [%d]",
__func__, object_hdr->object_class);
return 0;
}
uint16_t object_length = OBJECT_HEADER_LENGTH
+ obj_encoder(object_hdr, versioning,
buf + OBJECT_HEADER_LENGTH);
double_linked_list_node *node =
(object_hdr->tlv_list == NULL ? NULL
: object_hdr->tlv_list->head);
for (; node != NULL; node = node->next_node) {
/* Returns the length of the TLV, including the TLV header */
object_length += pcep_encode_tlv(
(struct pcep_object_tlv_header *)node->data, versioning,
buf + object_length);
}
object_length = normalize_pcep_tlv_length(object_length);
write_object_header(object_hdr, object_length, buf);
object_hdr->encoded_object = buf;
object_hdr->encoded_object_length = object_length;
return object_length;
}
/* Object Header
*
* 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Object-Class | OT |Res|P|I| Object Length (bytes) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | |
* // (Object body) //
* | |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
*/
void write_object_header(struct pcep_object_header *object_hdr,
uint16_t object_length, uint8_t *buf)
{
buf[0] = object_hdr->object_class;
buf[1] = ((object_hdr->object_type << 4)
| (object_hdr->flag_p ? OBJECT_HEADER_FLAG_P : 0x00)
| (object_hdr->flag_i ? OBJECT_HEADER_FLAG_I : 0x00));
uint16_t net_order_length = htons(object_length);
memcpy(buf + 2, &net_order_length, sizeof(net_order_length));
}
/*
* Functions to encode objects
* - they will be passed a pointer to a buffer to write the object body,
* which is past the object header.
* - they should return the object body length, not including the object header
* length.
*/
uint16_t pcep_encode_obj_open(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_open *open = (struct pcep_object_open *)hdr;
obj_body_buf[0] = (open->open_version << 5) & 0xe0;
obj_body_buf[1] = open->open_keepalive;
obj_body_buf[2] = open->open_deadtimer;
obj_body_buf[3] = open->open_sid;
return LENGTH_1WORD;
}
uint16_t pcep_encode_obj_rp(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_rp *rp = (struct pcep_object_rp *)hdr;
obj_body_buf[3] = ((rp->flag_strict ? OBJECT_RP_FLAG_O : 0x00)
| (rp->flag_bidirectional ? OBJECT_RP_FLAG_B : 0x00)
| (rp->flag_reoptimization ? OBJECT_RP_FLAG_R : 0x00)
| (rp->flag_of ? OBJECT_RP_FLAG_OF : 0x00)
| (rp->priority & 0x07));
uint32_t *uint32_ptr = (uint32_t *)(obj_body_buf + 4);
*uint32_ptr = htonl(rp->request_id);
return LENGTH_2WORDS;
}
uint16_t pcep_encode_obj_notify(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_notify *notify = (struct pcep_object_notify *)hdr;
obj_body_buf[2] = notify->notification_type;
obj_body_buf[3] = notify->notification_value;
return LENGTH_1WORD;
}
uint16_t pcep_encode_obj_nopath(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_nopath *nopath = (struct pcep_object_nopath *)hdr;
obj_body_buf[0] = nopath->ni;
obj_body_buf[1] = ((nopath->flag_c) ? OBJECT_NOPATH_FLAG_C : 0x00);
return LENGTH_1WORD;
}
uint16_t pcep_encode_obj_association(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
uint16_t *uint16_ptr = (uint16_t *)obj_body_buf;
uint32_t *uint32_ptr = (uint32_t *)obj_body_buf;
if (hdr->object_type == PCEP_OBJ_TYPE_ASSOCIATION_IPV4) {
struct pcep_object_association_ipv4 *ipv4 =
(struct pcep_object_association_ipv4 *)hdr;
obj_body_buf[3] =
(ipv4->R_flag ? OBJECT_ASSOCIATION_FLAG_R : 0x00);
uint16_ptr[2] = htons(ipv4->association_type);
uint16_ptr[3] = htons(ipv4->association_id);
uint32_ptr[2] = ipv4->src.s_addr;
return LENGTH_3WORDS;
} else {
struct pcep_object_association_ipv6 *ipv6 =
(struct pcep_object_association_ipv6 *)hdr;
obj_body_buf[3] =
(ipv6->R_flag ? OBJECT_ASSOCIATION_FLAG_R : 0x00);
uint16_ptr[2] = htons(ipv6->association_type);
uint16_ptr[3] = htons(ipv6->association_id);
memcpy(uint32_ptr, &ipv6->src, sizeof(struct in6_addr));
return LENGTH_6WORDS;
}
}
uint16_t pcep_encode_obj_endpoints(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
uint32_t *uint32_ptr = (uint32_t *)obj_body_buf;
if (hdr->object_type == PCEP_OBJ_TYPE_ENDPOINT_IPV4) {
struct pcep_object_endpoints_ipv4 *ipv4 =
(struct pcep_object_endpoints_ipv4 *)hdr;
uint32_ptr[0] = ipv4->src_ipv4.s_addr;
uint32_ptr[1] = ipv4->dst_ipv4.s_addr;
return LENGTH_2WORDS;
} else {
struct pcep_object_endpoints_ipv6 *ipv6 =
(struct pcep_object_endpoints_ipv6 *)hdr;
memcpy(uint32_ptr, &ipv6->src_ipv6, sizeof(struct in6_addr));
memcpy(&uint32_ptr[4], &ipv6->dst_ipv6,
sizeof(struct in6_addr));
return LENGTH_8WORDS;
}
}
uint16_t pcep_encode_obj_bandwidth(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_bandwidth *bandwidth =
(struct pcep_object_bandwidth *)hdr;
uint32_t *uint32_ptr = (uint32_t *)obj_body_buf;
/* Seems like the compiler doesn't correctly copy the float, so memcpy()
* it */
memcpy(uint32_ptr, &(bandwidth->bandwidth), sizeof(uint32_t));
*uint32_ptr = htonl(*uint32_ptr);
return LENGTH_1WORD;
}
uint16_t pcep_encode_obj_metric(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_metric *metric = (struct pcep_object_metric *)hdr;
obj_body_buf[2] = ((metric->flag_c ? OBJECT_METRIC_FLAC_C : 0x00)
| (metric->flag_b ? OBJECT_METRIC_FLAC_B : 0x00));
obj_body_buf[3] = metric->type;
uint32_t *uint32_ptr = (uint32_t *)(obj_body_buf + 4);
/* Seems like the compiler doesn't correctly copy the float, so memcpy()
* it */
memcpy(uint32_ptr, &(metric->value), sizeof(uint32_t));
*uint32_ptr = htonl(*uint32_ptr);
return LENGTH_2WORDS;
}
uint16_t pcep_encode_obj_lspa(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_lspa *lspa = (struct pcep_object_lspa *)hdr;
uint32_t *uint32_ptr = (uint32_t *)obj_body_buf;
uint32_ptr[0] = htonl(lspa->lspa_exclude_any);
uint32_ptr[1] = htonl(lspa->lspa_include_any);
uint32_ptr[2] = htonl(lspa->lspa_include_all);
obj_body_buf[12] = lspa->setup_priority;
obj_body_buf[13] = lspa->holding_priority;
obj_body_buf[14] =
(lspa->flag_local_protection ? OBJECT_LSPA_FLAG_L : 0x00);
return LENGTH_4WORDS;
}
uint16_t pcep_encode_obj_svec(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_svec *svec = (struct pcep_object_svec *)hdr;
obj_body_buf[3] =
((svec->flag_srlg_diverse ? OBJECT_SVEC_FLAG_S : 0x00)
| (svec->flag_node_diverse ? OBJECT_SVEC_FLAG_N : 0x00)
| (svec->flag_link_diverse ? OBJECT_SVEC_FLAG_L : 0x00));
if (svec->request_id_list == NULL) {
return LENGTH_1WORD;
}
int index = 1;
uint32_t *uint32_ptr = (uint32_t *)obj_body_buf;
double_linked_list_node *node = svec->request_id_list->head;
for (; node != NULL; node = node->next_node) {
uint32_ptr[index++] = htonl(*((uint32_t *)(node->data)));
}
return LENGTH_1WORD
+ (svec->request_id_list->num_entries * sizeof(uint32_t));
}
uint16_t pcep_encode_obj_error(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_error *error = (struct pcep_object_error *)hdr;
obj_body_buf[2] = error->error_type;
obj_body_buf[3] = error->error_value;
return LENGTH_1WORD;
}
uint16_t pcep_encode_obj_close(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_close *close = (struct pcep_object_close *)hdr;
obj_body_buf[3] = close->reason;
return LENGTH_1WORD;
}
uint16_t pcep_encode_obj_srp(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_srp *srp = (struct pcep_object_srp *)hdr;
obj_body_buf[3] = (srp->flag_lsp_remove ? OBJECT_SRP_FLAG_R : 0x00);
uint32_t *uint32_ptr = (uint32_t *)(obj_body_buf + 4);
*uint32_ptr = htonl(srp->srp_id_number);
return LENGTH_2WORDS;
}
uint16_t pcep_encode_obj_lsp(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_lsp *lsp = (struct pcep_object_lsp *)hdr;
uint32_t *uint32_ptr = (uint32_t *)obj_body_buf;
uint32_ptr[0] = htonl((lsp->plsp_id << 12) & 0xfffff000);
obj_body_buf[3] = ((lsp->flag_c ? OBJECT_LSP_FLAG_C : 0x00)
| ((lsp->operational_status << 4) & 0x70)
| (lsp->flag_a ? OBJECT_LSP_FLAG_A : 0x00)
| (lsp->flag_r ? OBJECT_LSP_FLAG_R : 0x00)
| (lsp->flag_s ? OBJECT_LSP_FLAG_S : 0x00)
| (lsp->flag_d ? OBJECT_LSP_FLAG_D : 0x00));
return LENGTH_1WORD;
}
uint16_t pcep_encode_obj_vendor_info(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_vendor_info *obj =
(struct pcep_object_vendor_info *)hdr;
uint32_t *uint32_ptr = (uint32_t *)obj_body_buf;
uint32_ptr[0] = htonl(obj->enterprise_number);
uint32_ptr[1] = htonl(obj->enterprise_specific_info);
return LENGTH_2WORDS;
}
uint16_t pcep_encode_obj_inter_layer(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_inter_layer *obj =
(struct pcep_object_inter_layer *)hdr;
obj_body_buf[3] = ((obj->flag_i ? OBJECT_INTER_LAYER_FLAG_I : 0x00)
| (obj->flag_m ? OBJECT_INTER_LAYER_FLAG_M : 0x00)
| (obj->flag_t ? OBJECT_INTER_LAYER_FLAG_T : 0x00));
return LENGTH_1WORD;
}
uint16_t pcep_encode_obj_switch_layer(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_switch_layer *obj =
(struct pcep_object_switch_layer *)hdr;
uint8_t buf_index = 0;
double_linked_list_node *node = obj->switch_layer_rows->head;
while (node != NULL) {
struct pcep_object_switch_layer_row *row = node->data;
if (row == NULL) {
break;
}
obj_body_buf[buf_index] = row->lsp_encoding_type;
obj_body_buf[buf_index + 1] = row->switching_type;
obj_body_buf[buf_index + 3] =
(row->flag_i ? OBJECT_SWITCH_LAYER_FLAG_I : 0x00);
buf_index += LENGTH_1WORD;
}
return buf_index;
}
uint16_t pcep_encode_obj_req_adap_cap(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_req_adap_cap *obj =
(struct pcep_object_req_adap_cap *)hdr;
obj_body_buf[0] = obj->switching_capability;
obj_body_buf[1] = obj->encoding;
return LENGTH_1WORD;
}
uint16_t pcep_encode_obj_server_ind(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_server_indication *obj =
(struct pcep_object_server_indication *)hdr;
obj_body_buf[0] = obj->switching_capability;
obj_body_buf[1] = obj->encoding;
return LENGTH_1WORD;
}
uint16_t pcep_encode_obj_objective_function(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_objective_function *obj =
(struct pcep_object_objective_function *)hdr;
uint16_t *uint16_ptr = (uint16_t *)obj_body_buf;
*uint16_ptr = htons(obj->of_code);
return LENGTH_1WORD;
}
uint16_t pcep_encode_obj_ro(struct pcep_object_header *hdr,
struct pcep_versioning *versioning,
uint8_t *obj_body_buf)
{
(void)versioning;
struct pcep_object_ro *ro = (struct pcep_object_ro *)hdr;
if (ro == NULL || ro->sub_objects == NULL) {
return 0;
}
/* RO Subobject format
*
* 0 1
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-------------//----------------+
* |L| Type | Length | (Subobject contents) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-------------//----------------+
*/
uint16_t index = 0;
double_linked_list_node *node = ro->sub_objects->head;
for (; node != NULL; node = node->next_node) {
struct pcep_object_ro_subobj *ro_subobj = node->data;
obj_body_buf[index++] =
((ro_subobj->flag_subobj_loose_hop ? 0x80 : 0x00)
| (ro_subobj->ro_subobj_type));
/* The length will be written below, depending on the subobj
* type */
uint8_t *length_ptr = &(obj_body_buf[index++]);
uint32_t *uint32_ptr = (uint32_t *)(obj_body_buf + index);
/* - The index has already been incremented past the header,
* and now points to the ro_subobj body. Below it just needs
* to be incremented past the body.
*
* - Each section below needs to write the total length,
* including the 2 byte subobj header. */
switch (ro_subobj->ro_subobj_type) {
case RO_SUBOBJ_TYPE_IPV4: {
struct pcep_ro_subobj_ipv4 *ipv4 =
(struct pcep_ro_subobj_ipv4 *)ro_subobj;
uint32_ptr[0] = ipv4->ip_addr.s_addr;
index += LENGTH_1WORD;
obj_body_buf[index++] = ipv4->prefix_length;
obj_body_buf[index++] =
(ipv4->flag_local_protection
? OBJECT_SUBOBJ_IP_FLAG_LOCAL_PROT
: 0x00);
*length_ptr = LENGTH_2WORDS;
} break;
case RO_SUBOBJ_TYPE_IPV6: {
struct pcep_ro_subobj_ipv6 *ipv6 =
(struct pcep_ro_subobj_ipv6 *)ro_subobj;
encode_ipv6(&ipv6->ip_addr, uint32_ptr);
index += LENGTH_4WORDS;
obj_body_buf[index++] = ipv6->prefix_length;
obj_body_buf[index++] =
(ipv6->flag_local_protection
? OBJECT_SUBOBJ_IP_FLAG_LOCAL_PROT
: 0x00);
*length_ptr = LENGTH_5WORDS;
} break;
case RO_SUBOBJ_TYPE_LABEL: {
struct pcep_ro_subobj_32label *label =
(struct pcep_ro_subobj_32label *)ro_subobj;
obj_body_buf[index++] =
(label->flag_global_label
? OBJECT_SUBOBJ_LABEL_FLAG_GLOGAL
: 0x00);
obj_body_buf[index++] = label->class_type;
uint32_ptr = (uint32_t *)(obj_body_buf + index);
*uint32_ptr = htonl(label->label);
*length_ptr = LENGTH_2WORDS;
index += LENGTH_1WORD;
} break;
case RO_SUBOBJ_TYPE_UNNUM: {
struct pcep_ro_subobj_unnum *unum =
(struct pcep_ro_subobj_unnum *)ro_subobj;
index += 2; /* increment past 2 reserved bytes */
uint32_ptr = (uint32_t *)(obj_body_buf + index);
uint32_ptr[0] = unum->router_id.s_addr;
uint32_ptr[1] = htonl(unum->interface_id);
*length_ptr = LENGTH_3WORDS;
index += LENGTH_2WORDS;
} break;
case RO_SUBOBJ_TYPE_ASN: {
struct pcep_ro_subobj_asn *asn =
(struct pcep_ro_subobj_asn *)ro_subobj;
uint16_t *uint16_ptr =
(uint16_t *)(obj_body_buf + index);
*uint16_ptr = htons(asn->asn);
*length_ptr = LENGTH_1WORD;
index += 2;
} break;
case RO_SUBOBJ_TYPE_SR: {
/* SR-ERO subobject 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* |L| Type=36 | Length | NT | Flags
* |F|S|C|M|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | SID (optional) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* // NAI (variable, optional) //
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
struct pcep_ro_subobj_sr *sr_subobj =
(struct pcep_ro_subobj_sr *)ro_subobj;
obj_body_buf[index++] =
((sr_subobj->nai_type << 4) & 0xf0);
obj_body_buf[index++] =
((sr_subobj->flag_f ? OBJECT_SUBOBJ_SR_FLAG_F
: 0x00)
| (sr_subobj->flag_s ? OBJECT_SUBOBJ_SR_FLAG_S
: 0x00)
| (sr_subobj->flag_c ? OBJECT_SUBOBJ_SR_FLAG_C
: 0x00)
| (sr_subobj->flag_m ? OBJECT_SUBOBJ_SR_FLAG_M
: 0x00));
uint32_ptr = (uint32_t *)(obj_body_buf + index);
/* Start with LENGTH_1WORD for the SubObj HDR + NT +
* Flags */
uint8_t sr_base_length = LENGTH_1WORD;
/* If the sid_absent flag is true, then dont convert the
* sid */
if (sr_subobj->flag_s == false) {
uint32_ptr[0] = htonl(sr_subobj->sid);
index += LENGTH_1WORD;
uint32_ptr = (uint32_t *)(obj_body_buf + index);
sr_base_length += LENGTH_1WORD;
}
/* The lengths below need to include:
* - sr_base_length: set above to include SR SubObj Hdr
* and the SID if present
* - Number of bytes written to the NAI
* The index will only be incremented below by the
* number of bytes written to the NAI, since the RO SR
* subobj header and the SID have already been written.
*/
double_linked_list_node *nai_node =
(sr_subobj->nai_list == NULL
? NULL
: sr_subobj->nai_list->head);
if (nai_node == NULL) {
if (sr_subobj->nai_type
== PCEP_SR_SUBOBJ_NAI_ABSENT) {
*length_ptr = sr_base_length;
continue;
} else {
return 0;
}
}
switch (sr_subobj->nai_type) {
case PCEP_SR_SUBOBJ_NAI_IPV4_NODE:
uint32_ptr[0] =
((struct in_addr *)nai_node->data)
->s_addr;
*length_ptr = sr_base_length + LENGTH_1WORD;
index += LENGTH_1WORD;
break;
case PCEP_SR_SUBOBJ_NAI_IPV6_NODE:
encode_ipv6((struct in6_addr *)nai_node->data,
uint32_ptr);
*length_ptr = sr_base_length + LENGTH_4WORDS;
index += LENGTH_4WORDS;
break;
case PCEP_SR_SUBOBJ_NAI_UNNUMBERED_IPV4_ADJACENCY:
uint32_ptr[0] =
((struct in_addr *)nai_node->data)
->s_addr;
nai_node = nai_node->next_node;
uint32_ptr[1] =
((struct in_addr *)nai_node->data)
->s_addr;
nai_node = nai_node->next_node;
uint32_ptr[2] =
((struct in_addr *)nai_node->data)
->s_addr;
nai_node = nai_node->next_node;
uint32_ptr[3] =
((struct in_addr *)nai_node->data)
->s_addr;
*length_ptr = sr_base_length + LENGTH_4WORDS;
index += LENGTH_4WORDS;
break;
case PCEP_SR_SUBOBJ_NAI_IPV4_ADJACENCY:
uint32_ptr[0] =
((struct in_addr *)nai_node->data)
->s_addr;
nai_node = nai_node->next_node;
uint32_ptr[1] =
((struct in_addr *)nai_node->data)
->s_addr;
*length_ptr = sr_base_length + LENGTH_2WORDS;
index += LENGTH_2WORDS;
break;
case PCEP_SR_SUBOBJ_NAI_IPV6_ADJACENCY:
encode_ipv6((struct in6_addr *)nai_node->data,
uint32_ptr);
nai_node = nai_node->next_node;
encode_ipv6((struct in6_addr *)nai_node->data,
uint32_ptr + 4);
*length_ptr = sr_base_length + LENGTH_8WORDS;
index += LENGTH_8WORDS;
break;
case PCEP_SR_SUBOBJ_NAI_LINK_LOCAL_IPV6_ADJACENCY:
encode_ipv6((struct in6_addr *)nai_node->data,
uint32_ptr);
nai_node = nai_node->next_node;
uint32_ptr[4] =
((struct in_addr *)nai_node->data)
->s_addr;
nai_node = nai_node->next_node;
encode_ipv6((struct in6_addr *)nai_node->data,
uint32_ptr + 5);
nai_node = nai_node->next_node;
uint32_ptr[9] =
((struct in_addr *)nai_node->data)
->s_addr;
*length_ptr = sr_base_length + LENGTH_10WORDS;
index += LENGTH_10WORDS;
break;
case PCEP_SR_SUBOBJ_NAI_ABSENT:
case PCEP_SR_SUBOBJ_NAI_UNKNOWN:
break;
}
} break;
case RO_SUBOBJ_UNKNOWN:
break;
}
}
return index;
}
void encode_ipv6(struct in6_addr *src_ipv6, uint32_t *dst)
{
memcpy(dst, src_ipv6, sizeof(struct in6_addr));
}
/*
* Decoding functions.
*/
void pcep_decode_object_hdr(const uint8_t *obj_buf,
struct pcep_object_header *obj_hdr)
{
memset(obj_hdr, 0, sizeof(struct pcep_object_header));
obj_hdr->object_class = obj_buf[0];
obj_hdr->object_type = (obj_buf[1] >> 4) & 0x0f;
obj_hdr->flag_p = (obj_buf[1] & OBJECT_HEADER_FLAG_P);
obj_hdr->flag_i = (obj_buf[1] & OBJECT_HEADER_FLAG_I);
uint16_t net_order_length;
memcpy(&net_order_length, obj_buf + 2, sizeof(net_order_length));
obj_hdr->encoded_object_length = ntohs(net_order_length);
obj_hdr->encoded_object = obj_buf;
}
uint16_t pcep_object_get_length(enum pcep_object_classes object_class,
enum pcep_object_types object_type)
{
uint8_t object_length = pcep_object_class_lengths[object_class];
if (object_length == 0) {
if (object_class == PCEP_OBJ_CLASS_ENDPOINTS) {
if (object_type == PCEP_OBJ_TYPE_ENDPOINT_IPV4) {
return 12;
} else if (object_type == PCEP_OBJ_TYPE_ENDPOINT_IPV6) {
return 36;
}
}
return 0;
}
return object_length;
}
uint16_t pcep_object_get_length_by_hdr(struct pcep_object_header *object_hdr)
{
return (pcep_object_get_length(object_hdr->object_class,
object_hdr->object_type));
}
bool pcep_object_has_tlvs(struct pcep_object_header *object_hdr)
{
uint8_t object_length = pcep_object_get_length_by_hdr(object_hdr);
if (object_length == 0) {
return false;
}
return (object_hdr->encoded_object_length - object_length) > 0;
}
struct pcep_object_header *pcep_decode_object(const uint8_t *obj_buf)
{
struct pcep_object_header object_hdr;
/* Only initializes and decodes the Object Header: class, type, flags,
* and length */
pcep_decode_object_hdr(obj_buf, &object_hdr);
if (object_hdr.object_class >= MAX_OBJECT_ENCODER_INDEX) {
pcep_log(LOG_INFO,
"%s: Cannot decode unknown Object class [%d]",
__func__, object_hdr.object_class);
return NULL;
}
object_decoder_funcptr obj_decoder =
object_decoders[object_hdr.object_class];
if (obj_decoder == NULL) {
pcep_log(LOG_INFO,
"%s: No object decoder found for Object class [%d]",
__func__, object_hdr.object_class);
return NULL;
}
/* The object decoders will start decoding the object body, if
* anything from the header is needed, they have the object_hdr */
struct pcep_object_header *object =
obj_decoder(&object_hdr, obj_buf + OBJECT_HEADER_LENGTH);
if (object == NULL) {
pcep_log(LOG_INFO, "%s: Unable to decode Object class [%d].",
__func__, object_hdr.object_class);
return NULL;
}
if (pcep_object_has_tlvs(&object_hdr)) {
object->tlv_list = dll_initialize();
int num_iterations = 0;
uint16_t tlv_index = pcep_object_get_length_by_hdr(&object_hdr);
while ((object->encoded_object_length - tlv_index) > 0
&& num_iterations++ < MAX_ITERATIONS) {
struct pcep_object_tlv_header *tlv =
pcep_decode_tlv(obj_buf + tlv_index);
if (tlv == NULL) {
/* TODO should we do anything else here ? */
return object;
}
/* The TLV length does not include the TLV header */
tlv_index += normalize_pcep_tlv_length(
tlv->encoded_tlv_length + TLV_HEADER_LENGTH);
dll_append(object->tlv_list, tlv);
}
}
return object;
}
static struct pcep_object_header *
common_object_create(struct pcep_object_header *hdr, uint16_t new_obj_length)
{
struct pcep_object_header *new_object =
pceplib_malloc(PCEPLIB_MESSAGES, new_obj_length);
memset(new_object, 0, new_obj_length);
memcpy(new_object, hdr, sizeof(struct pcep_object_header));
return new_object;
}
/*
* Decoders
*/
struct pcep_object_header *pcep_decode_obj_open(struct pcep_object_header *hdr,
const uint8_t *obj_buf)
{
struct pcep_object_open *obj =
(struct pcep_object_open *)common_object_create(
hdr, sizeof(struct pcep_object_open));
obj->open_version = (obj_buf[0] >> 5) & 0x07;
obj->open_keepalive = obj_buf[1];
obj->open_deadtimer = obj_buf[2];
obj->open_sid = obj_buf[3];
return (struct pcep_object_header *)obj;
}
struct pcep_object_header *pcep_decode_obj_rp(struct pcep_object_header *hdr,
const uint8_t *obj_buf)
{
struct pcep_object_rp *obj =
(struct pcep_object_rp *)common_object_create(
hdr, sizeof(struct pcep_object_rp));
obj->flag_reoptimization = (obj_buf[3] & OBJECT_RP_FLAG_R);
obj->flag_bidirectional = (obj_buf[3] & OBJECT_RP_FLAG_B);
obj->flag_strict = (obj_buf[3] & OBJECT_RP_FLAG_O);
obj->flag_of = (obj_buf[3] & OBJECT_RP_FLAG_OF);
obj->priority = (obj_buf[3] & 0x07);
obj->request_id = ntohl(*((uint32_t *)(obj_buf + 4)));
return (struct pcep_object_header *)obj;
}
struct pcep_object_header *
pcep_decode_obj_notify(struct pcep_object_header *hdr, const uint8_t *obj_buf)
{
struct pcep_object_notify *obj =
(struct pcep_object_notify *)common_object_create(
hdr, sizeof(struct pcep_object_notify));
obj->notification_type = obj_buf[2];
obj->notification_value = obj_buf[3];
return (struct pcep_object_header *)obj;
}
struct pcep_object_header *
pcep_decode_obj_nopath(struct pcep_object_header *hdr, const uint8_t *obj_buf)
{
struct pcep_object_nopath *obj =
(struct pcep_object_nopath *)common_object_create(
hdr, sizeof(struct pcep_object_nopath));
obj->ni = (obj_buf[0] >> 1);
obj->flag_c = (obj_buf[0] & OBJECT_NOPATH_FLAG_C);
return (struct pcep_object_header *)obj;
}
struct pcep_object_header *
pcep_decode_obj_association(struct pcep_object_header *hdr,
const uint8_t *obj_buf)
{
uint16_t *uint16_ptr = (uint16_t *)obj_buf;
uint32_t *uint32_ptr = (uint32_t *)obj_buf;
if (hdr->object_type == PCEP_OBJ_TYPE_ASSOCIATION_IPV4) {
struct pcep_object_association_ipv4 *obj =
(struct pcep_object_association_ipv4 *)
common_object_create(
hdr,
sizeof(struct
pcep_object_association_ipv4));
obj->R_flag = (obj_buf[3] & OBJECT_ASSOCIATION_FLAG_R);
obj->association_type = ntohs(uint16_ptr[2]);
obj->association_id = ntohs(uint16_ptr[3]);
obj->src.s_addr = uint32_ptr[2];
return (struct pcep_object_header *)obj;
} else if (hdr->object_type == PCEP_OBJ_TYPE_ENDPOINT_IPV6) {
struct pcep_object_association_ipv6 *obj =
(struct pcep_object_association_ipv6 *)
common_object_create(
hdr,
sizeof(struct
pcep_object_association_ipv6));
obj->R_flag = (obj_buf[3] & OBJECT_ASSOCIATION_FLAG_R);
obj->association_type = ntohs(uint16_ptr[2]);
obj->association_id = ntohs(uint16_ptr[3]);
memcpy(&obj->src, &uint32_ptr[2], sizeof(struct in6_addr));
return (struct pcep_object_header *)obj;
}
return NULL;
}
struct pcep_object_header *
pcep_decode_obj_endpoints(struct pcep_object_header *hdr,
const uint8_t *obj_buf)
{
uint32_t *uint32_ptr = (uint32_t *)obj_buf;
if (hdr->object_type == PCEP_OBJ_TYPE_ENDPOINT_IPV4) {
struct pcep_object_endpoints_ipv4 *obj =
(struct pcep_object_endpoints_ipv4 *)
common_object_create(
hdr,
sizeof(struct
pcep_object_endpoints_ipv4));
obj->src_ipv4.s_addr = uint32_ptr[0];
obj->dst_ipv4.s_addr = uint32_ptr[1];
return (struct pcep_object_header *)obj;
} else if (hdr->object_type == PCEP_OBJ_TYPE_ENDPOINT_IPV6) {
struct pcep_object_endpoints_ipv6 *obj =
(struct pcep_object_endpoints_ipv6 *)
common_object_create(
hdr,
sizeof(struct
pcep_object_endpoints_ipv6));
memcpy(&obj->src_ipv6, &uint32_ptr[0], sizeof(struct in6_addr));
memcpy(&obj->dst_ipv6, &uint32_ptr[4], sizeof(struct in6_addr));
return (struct pcep_object_header *)obj;
}
return NULL;
}
struct pcep_object_header *
pcep_decode_obj_bandwidth(struct pcep_object_header *hdr,
const uint8_t *obj_buf)
{
struct pcep_object_bandwidth *obj =
(struct pcep_object_bandwidth *)common_object_create(
hdr, sizeof(struct pcep_object_bandwidth));
uint32_t value = ntohl(*((uint32_t *)obj_buf));
/* Seems like the compiler doesn't correctly copy to the float, so
* memcpy() it */
memcpy(&obj->bandwidth, &value, sizeof(uint32_t));
return (struct pcep_object_header *)obj;
}
struct pcep_object_header *
pcep_decode_obj_metric(struct pcep_object_header *hdr, const uint8_t *obj_buf)
{
struct pcep_object_metric *obj =
(struct pcep_object_metric *)common_object_create(
hdr, sizeof(struct pcep_object_metric));
obj->flag_b = (obj_buf[2] & OBJECT_METRIC_FLAC_B);
obj->flag_c = (obj_buf[2] & OBJECT_METRIC_FLAC_C);
obj->type = obj_buf[3];
uint32_t value = ntohl(*((uint32_t *)(obj_buf + 4)));
/* Seems like the compiler doesn't correctly copy to the float, so
* memcpy() it */
memcpy(&obj->value, &value, sizeof(uint32_t));
return (struct pcep_object_header *)obj;
}
struct pcep_object_header *pcep_decode_obj_lspa(struct pcep_object_header *hdr,
const uint8_t *obj_buf)
{
struct pcep_object_lspa *obj =
(struct pcep_object_lspa *)common_object_create(
hdr, sizeof(struct pcep_object_lspa));
uint32_t *uint32_ptr = (uint32_t *)obj_buf;
obj->lspa_exclude_any = ntohl(uint32_ptr[0]);
obj->lspa_include_any = ntohl(uint32_ptr[1]);
obj->lspa_include_all = ntohl(uint32_ptr[2]);
obj->setup_priority = obj_buf[12];
obj->holding_priority = obj_buf[13];
obj->flag_local_protection = (obj_buf[14] & OBJECT_LSPA_FLAG_L);
return (struct pcep_object_header *)obj;
}
struct pcep_object_header *pcep_decode_obj_svec(struct pcep_object_header *hdr,
const uint8_t *obj_buf)
{
struct pcep_object_svec *obj =
(struct pcep_object_svec *)common_object_create(
hdr, sizeof(struct pcep_object_svec));
obj->flag_link_diverse = (obj_buf[3] & OBJECT_SVEC_FLAG_L);
obj->flag_node_diverse = (obj_buf[3] & OBJECT_SVEC_FLAG_N);
obj->flag_srlg_diverse = (obj_buf[3] & OBJECT_SVEC_FLAG_S);
if (hdr->encoded_object_length > LENGTH_2WORDS) {
obj->request_id_list = dll_initialize();
uint16_t index = 1;
uint32_t *uint32_ptr = (uint32_t *)obj_buf;
for (;
index < ((hdr->encoded_object_length - LENGTH_2WORDS) / 4);
index++) {
uint32_t *req_id_ptr = pceplib_malloc(PCEPLIB_MESSAGES,
sizeof(uint32_t));
*req_id_ptr = uint32_ptr[index];
dll_append(obj->request_id_list, req_id_ptr);
}
}
return (struct pcep_object_header *)obj;
}
struct pcep_object_header *pcep_decode_obj_error(struct pcep_object_header *hdr,
const uint8_t *obj_buf)
{
struct pcep_object_error *obj =
(struct pcep_object_error *)common_object_create(
hdr, sizeof(struct pcep_object_error));
obj->error_type = obj_buf[2];
obj->error_value = obj_buf[3];
return (struct pcep_object_header *)obj;
}
struct pcep_object_header *pcep_decode_obj_close(struct pcep_object_header *hdr,
const uint8_t *obj_buf)
{
struct pcep_object_close *obj =
(struct pcep_object_close *)common_object_create(
hdr, sizeof(struct pcep_object_close));
obj->reason = obj_buf[3];
return (struct pcep_object_header *)obj;
}
struct pcep_object_header *pcep_decode_obj_srp(struct pcep_object_header *hdr,
const uint8_t *obj_buf)
{
struct pcep_object_srp *obj =
(struct pcep_object_srp *)common_object_create(
hdr, sizeof(struct pcep_object_srp));
obj->flag_lsp_remove = (obj_buf[3] & OBJECT_SRP_FLAG_R);
obj->srp_id_number = ntohl(*((uint32_t *)(obj_buf + 4)));
return (struct pcep_object_header *)obj;
}
struct pcep_object_header *pcep_decode_obj_lsp(struct pcep_object_header *hdr,
const uint8_t *obj_buf)
{
struct pcep_object_lsp *obj =
(struct pcep_object_lsp *)common_object_create(
hdr, sizeof(struct pcep_object_lsp));
obj->flag_d = (obj_buf[3] & OBJECT_LSP_FLAG_D);
obj->flag_s = (obj_buf[3] & OBJECT_LSP_FLAG_S);
obj->flag_r = (obj_buf[3] & OBJECT_LSP_FLAG_R);
obj->flag_a = (obj_buf[3] & OBJECT_LSP_FLAG_A);
obj->flag_c = (obj_buf[3] & OBJECT_LSP_FLAG_C);
obj->operational_status = ((obj_buf[3] >> 4) & 0x07);
obj->plsp_id = ((ntohl(*((uint32_t *)obj_buf)) >> 12) & 0x000fffff);
return (struct pcep_object_header *)obj;
}
struct pcep_object_header *
pcep_decode_obj_vendor_info(struct pcep_object_header *hdr,
const uint8_t *obj_buf)
{
struct pcep_object_vendor_info *obj =
(struct pcep_object_vendor_info *)common_object_create(
hdr, sizeof(struct pcep_object_vendor_info));
obj->enterprise_number = ntohl(*((uint32_t *)(obj_buf)));
obj->enterprise_specific_info = ntohl(*((uint32_t *)(obj_buf + 4)));
if (obj->enterprise_number == ENTERPRISE_NUMBER_CISCO
&& obj->enterprise_specific_info == ENTERPRISE_COLOR_CISCO)
obj->enterprise_specific_info1 =
ntohl(*((uint32_t *)(obj_buf + 8)));
else
obj->enterprise_specific_info1 = 0;
return (struct pcep_object_header *)obj;
}
struct pcep_object_header *
pcep_decode_obj_inter_layer(struct pcep_object_header *hdr,
const uint8_t *obj_buf)
{
struct pcep_object_inter_layer *obj =
(struct pcep_object_inter_layer *)common_object_create(
hdr, sizeof(struct pcep_object_inter_layer));
obj->flag_t = (obj_buf[3] & OBJECT_INTER_LAYER_FLAG_T);
obj->flag_m = (obj_buf[3] & OBJECT_INTER_LAYER_FLAG_M);
obj->flag_i = (obj_buf[3] & OBJECT_INTER_LAYER_FLAG_I);
return (struct pcep_object_header *)obj;
}
struct pcep_object_header *
pcep_decode_obj_switch_layer(struct pcep_object_header *hdr,
const uint8_t *obj_buf)
{
struct pcep_object_switch_layer *obj =
(struct pcep_object_switch_layer *)common_object_create(
hdr, sizeof(struct pcep_object_switch_layer));
obj->switch_layer_rows = dll_initialize();
int num_rows = ((hdr->encoded_object_length - 4) / 4);
uint8_t buf_index = 0;
int i = 0;
for (; i < num_rows; i++) {
struct pcep_object_switch_layer_row *row = pceplib_malloc(
PCEPLIB_MESSAGES,
sizeof(struct pcep_object_switch_layer_row));
row->lsp_encoding_type = obj_buf[buf_index];
row->switching_type = obj_buf[buf_index + 1];
row->flag_i =
(obj_buf[buf_index + 3] & OBJECT_SWITCH_LAYER_FLAG_I);
dll_append(obj->switch_layer_rows, row);
buf_index += LENGTH_1WORD;
}
return (struct pcep_object_header *)obj;
}
struct pcep_object_header *
pcep_decode_obj_req_adap_cap(struct pcep_object_header *hdr,
const uint8_t *obj_buf)
{
struct pcep_object_req_adap_cap *obj =
(struct pcep_object_req_adap_cap *)common_object_create(
hdr, sizeof(struct pcep_object_req_adap_cap));
obj->switching_capability = obj_buf[0];
obj->encoding = obj_buf[1];
return (struct pcep_object_header *)obj;
}
struct pcep_object_header *
pcep_decode_obj_server_ind(struct pcep_object_header *hdr,
const uint8_t *obj_buf)
{
struct pcep_object_server_indication *obj =
(struct pcep_object_server_indication *)common_object_create(
hdr, sizeof(struct pcep_object_server_indication));
obj->switching_capability = obj_buf[0];
obj->encoding = obj_buf[1];
return (struct pcep_object_header *)obj;
}
struct pcep_object_header *
pcep_decode_obj_objective_function(struct pcep_object_header *hdr,
const uint8_t *obj_buf)
{
struct pcep_object_objective_function *obj =
(struct pcep_object_objective_function *)common_object_create(
hdr, sizeof(struct pcep_object_objective_function));
uint16_t *uint16_ptr = (uint16_t *)obj_buf;
obj->of_code = ntohs(*uint16_ptr);
return (struct pcep_object_header *)obj;
}
void set_ro_subobj_fields(struct pcep_object_ro_subobj *subobj, bool flag_l,
uint8_t subobj_type)
{
subobj->flag_subobj_loose_hop = flag_l;
subobj->ro_subobj_type = subobj_type;
}
void decode_ipv6(const uint32_t *src, struct in6_addr *dst_ipv6)
{
memcpy(dst_ipv6, src, sizeof(struct in6_addr));
}
struct pcep_object_header *pcep_decode_obj_ro(struct pcep_object_header *hdr,
const uint8_t *obj_buf)
{
struct pcep_object_ro *obj =
(struct pcep_object_ro *)common_object_create(
hdr, sizeof(struct pcep_object_ro));
obj->sub_objects = dll_initialize();
/* RO Subobject format
*
* 0 1
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-------------//----------------+
* |L| Type | Length | (Subobject contents) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-------------//----------------+
*/
uint16_t read_count = 0;
int num_sub_objects = 1;
uint32_t *uint32_ptr;
uint16_t obj_body_length =
hdr->encoded_object_length - OBJECT_HEADER_LENGTH;
while ((obj_body_length - read_count) > OBJECT_RO_SUBOBJ_HEADER_LENGTH
&& num_sub_objects < MAX_ITERATIONS) {
num_sub_objects++;
/* Read the Sub-Object Header */
bool flag_l = (obj_buf[read_count] & 0x80);
uint8_t subobj_type = (obj_buf[read_count++] & 0x7f);
uint8_t subobj_length = obj_buf[read_count++];
if (subobj_length <= OBJECT_RO_SUBOBJ_HEADER_LENGTH) {
pcep_log(LOG_INFO,
"%s: Invalid ro subobj type [%d] length [%d]",
__func__, subobj_type, subobj_length);
pceplib_free(PCEPLIB_MESSAGES, obj);
return NULL;
}
switch (subobj_type) {
case RO_SUBOBJ_TYPE_IPV4: {
struct pcep_ro_subobj_ipv4 *ipv4 = pceplib_malloc(
PCEPLIB_MESSAGES,
sizeof(struct pcep_ro_subobj_ipv4));
ipv4->ro_subobj.flag_subobj_loose_hop = flag_l;
ipv4->ro_subobj.ro_subobj_type = subobj_type;
uint32_ptr = (uint32_t *)(obj_buf + read_count);
ipv4->ip_addr.s_addr = *uint32_ptr;
read_count += LENGTH_1WORD;
ipv4->prefix_length = obj_buf[read_count++];
ipv4->flag_local_protection =
(obj_buf[read_count++]
& OBJECT_SUBOBJ_IP_FLAG_LOCAL_PROT);
dll_append(obj->sub_objects, ipv4);
} break;
case RO_SUBOBJ_TYPE_IPV6: {
struct pcep_ro_subobj_ipv6 *ipv6 = pceplib_malloc(
PCEPLIB_MESSAGES,
sizeof(struct pcep_ro_subobj_ipv6));
ipv6->ro_subobj.flag_subobj_loose_hop = flag_l;
ipv6->ro_subobj.ro_subobj_type = subobj_type;
decode_ipv6((uint32_t *)obj_buf, &ipv6->ip_addr);
read_count += LENGTH_4WORDS;
ipv6->prefix_length = obj_buf[read_count++];
ipv6->flag_local_protection =
(obj_buf[read_count++]
& OBJECT_SUBOBJ_IP_FLAG_LOCAL_PROT);
dll_append(obj->sub_objects, ipv6);
} break;
case RO_SUBOBJ_TYPE_LABEL: {
struct pcep_ro_subobj_32label *label = pceplib_malloc(
PCEPLIB_MESSAGES,
sizeof(struct pcep_ro_subobj_32label));
label->ro_subobj.flag_subobj_loose_hop = flag_l;
label->ro_subobj.ro_subobj_type = subobj_type;
label->flag_global_label =
(obj_buf[read_count++]
& OBJECT_SUBOBJ_LABEL_FLAG_GLOGAL);
label->class_type = obj_buf[read_count++];
label->label = ntohl(obj_buf[read_count]);
read_count += LENGTH_1WORD;
dll_append(obj->sub_objects, label);
} break;
case RO_SUBOBJ_TYPE_UNNUM: {
struct pcep_ro_subobj_unnum *unum = pceplib_malloc(
PCEPLIB_MESSAGES,
sizeof(struct pcep_ro_subobj_unnum));
unum->ro_subobj.flag_subobj_loose_hop = flag_l;
unum->ro_subobj.ro_subobj_type = subobj_type;
set_ro_subobj_fields(
(struct pcep_object_ro_subobj *)unum, flag_l,
subobj_type);
uint32_ptr = (uint32_t *)(obj_buf + read_count);
unum->interface_id = ntohl(uint32_ptr[0]);
unum->router_id.s_addr = uint32_ptr[1];
read_count += 2;
dll_append(obj->sub_objects, unum);
} break;
case RO_SUBOBJ_TYPE_ASN: {
struct pcep_ro_subobj_asn *asn = pceplib_malloc(
PCEPLIB_MESSAGES,
sizeof(struct pcep_ro_subobj_asn));
asn->ro_subobj.flag_subobj_loose_hop = flag_l;
asn->ro_subobj.ro_subobj_type = subobj_type;
uint16_t *uint16_ptr =
(uint16_t *)(obj_buf + read_count);
asn->asn = ntohs(*uint16_ptr);
read_count += 2;
dll_append(obj->sub_objects, asn);
} break;
case RO_SUBOBJ_TYPE_SR: {
/* SR-ERO subobject 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* |L| Type=36 | Length | NT | Flags
* |F|S|C|M|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | SID (optional) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* // NAI (variable, optional) //
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
struct pcep_ro_subobj_sr *sr_subobj = pceplib_malloc(
PCEPLIB_MESSAGES,
sizeof(struct pcep_ro_subobj_sr));
sr_subobj->ro_subobj.flag_subobj_loose_hop = flag_l;
sr_subobj->ro_subobj.ro_subobj_type = subobj_type;
dll_append(obj->sub_objects, sr_subobj);
sr_subobj->nai_list = dll_initialize();
sr_subobj->nai_type =
((obj_buf[read_count++] >> 4) & 0x0f);
sr_subobj->flag_f =
(obj_buf[read_count] & OBJECT_SUBOBJ_SR_FLAG_F);
sr_subobj->flag_s =
(obj_buf[read_count] & OBJECT_SUBOBJ_SR_FLAG_S);
sr_subobj->flag_c =
(obj_buf[read_count] & OBJECT_SUBOBJ_SR_FLAG_C);
sr_subobj->flag_m =
(obj_buf[read_count] & OBJECT_SUBOBJ_SR_FLAG_M);
read_count++;
/* If the sid_absent flag is true, then dont decode the
* sid */
uint32_ptr = (uint32_t *)(obj_buf + read_count);
if (sr_subobj->flag_s == false) {
sr_subobj->sid = ntohl(*uint32_ptr);
read_count += LENGTH_1WORD;
uint32_ptr += 1;
}
switch (sr_subobj->nai_type) {
case PCEP_SR_SUBOBJ_NAI_IPV4_NODE: {
struct in_addr *ipv4 =
pceplib_malloc(PCEPLIB_MESSAGES,
sizeof(struct in_addr));
ipv4->s_addr = *uint32_ptr;
dll_append(sr_subobj->nai_list, ipv4);
read_count += LENGTH_1WORD;
} break;
case PCEP_SR_SUBOBJ_NAI_IPV6_NODE: {
struct in6_addr *ipv6 =
pceplib_malloc(PCEPLIB_MESSAGES,
sizeof(struct in6_addr));
decode_ipv6(uint32_ptr, ipv6);
dll_append(sr_subobj->nai_list, ipv6);
read_count += LENGTH_4WORDS;
} break;
case PCEP_SR_SUBOBJ_NAI_UNNUMBERED_IPV4_ADJACENCY: {
struct in_addr *ipv4 =
pceplib_malloc(PCEPLIB_MESSAGES,
sizeof(struct in_addr));
ipv4->s_addr = uint32_ptr[0];
dll_append(sr_subobj->nai_list, ipv4);
ipv4 = pceplib_malloc(PCEPLIB_MESSAGES,
sizeof(struct in_addr));
ipv4->s_addr = uint32_ptr[1];
dll_append(sr_subobj->nai_list, ipv4);
ipv4 = pceplib_malloc(PCEPLIB_MESSAGES,
sizeof(struct in_addr));
ipv4->s_addr = uint32_ptr[2];
dll_append(sr_subobj->nai_list, ipv4);
ipv4 = pceplib_malloc(PCEPLIB_MESSAGES,
sizeof(struct in_addr));
ipv4->s_addr = uint32_ptr[3];
dll_append(sr_subobj->nai_list, ipv4);
read_count += LENGTH_4WORDS;
} break;
case PCEP_SR_SUBOBJ_NAI_IPV4_ADJACENCY: {
struct in_addr *ipv4 =
pceplib_malloc(PCEPLIB_MESSAGES,
sizeof(struct in_addr));
ipv4->s_addr = uint32_ptr[0];
dll_append(sr_subobj->nai_list, ipv4);
ipv4 = pceplib_malloc(PCEPLIB_MESSAGES,
sizeof(struct in_addr));
ipv4->s_addr = uint32_ptr[1];
dll_append(sr_subobj->nai_list, ipv4);
read_count += LENGTH_2WORDS;
} break;
case PCEP_SR_SUBOBJ_NAI_IPV6_ADJACENCY: {
struct in6_addr *ipv6 =
pceplib_malloc(PCEPLIB_MESSAGES,
sizeof(struct in6_addr));
decode_ipv6(uint32_ptr, ipv6);
dll_append(sr_subobj->nai_list, ipv6);
ipv6 = pceplib_malloc(PCEPLIB_MESSAGES,
sizeof(struct in6_addr));
decode_ipv6(uint32_ptr + 4, ipv6);
dll_append(sr_subobj->nai_list, ipv6);
read_count += LENGTH_8WORDS;
} break;
case PCEP_SR_SUBOBJ_NAI_LINK_LOCAL_IPV6_ADJACENCY: {
struct in6_addr *ipv6 =
pceplib_malloc(PCEPLIB_MESSAGES,
sizeof(struct in6_addr));
decode_ipv6(uint32_ptr, ipv6);
dll_append(sr_subobj->nai_list, ipv6);
struct in_addr *ipv4 =
pceplib_malloc(PCEPLIB_MESSAGES,
sizeof(struct in_addr));
ipv4->s_addr = uint32_ptr[4];
dll_append(sr_subobj->nai_list, ipv4);
ipv6 = pceplib_malloc(PCEPLIB_MESSAGES,
sizeof(struct in6_addr));
decode_ipv6(uint32_ptr + 5, ipv6);
dll_append(sr_subobj->nai_list, ipv6);
ipv4 = pceplib_malloc(PCEPLIB_MESSAGES,
sizeof(struct in_addr));
ipv4->s_addr = uint32_ptr[9];
dll_append(sr_subobj->nai_list, ipv4);
read_count += LENGTH_10WORDS;
} break;
case PCEP_SR_SUBOBJ_NAI_ABSENT:
case PCEP_SR_SUBOBJ_NAI_UNKNOWN:
break;
}
} break;
default:
pcep_log(
LOG_INFO,
"%s: pcep_decode_obj_ro skipping unrecognized sub-object type [%d]",
__func__, subobj_type);
read_count += subobj_length;
break;
}
}
return (struct pcep_object_header *)obj;
}
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