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path_pcep_lib.c
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/*
* Copyright (C) 2020 NetDEF, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include "memory.h"
#include <debug.h>
#include "pceplib/pcep_utils_counters.h"
#include "pceplib/pcep_timers.h"
#include "pathd/path_errors.h"
#include "pathd/path_pcep.h"
#include "pathd/path_pcep_lib.h"
#include "pathd/path_pcep_debug.h"
DEFINE_MTYPE_STATIC(PATHD, PCEPLIB_INFRA, "PCEPlib Infrastructure");
DEFINE_MTYPE_STATIC(PATHD, PCEPLIB_MESSAGES, "PCEPlib PCEP Messages");
#define CLASS_TYPE(CLASS, TYPE) (((CLASS) << 16) | (TYPE))
#define DEFAULT_LSAP_SETUP_PRIO 4
#define DEFAULT_LSAP_HOLDING_PRIO 4
#define DEFAULT_LSAP_LOCAL_PRETECTION false
/* pceplib logging callback */
static int pceplib_logging_cb(int level, const char *fmt, va_list args);
/* Socket callbacks */
static int pcep_lib_pceplib_socket_read_cb(void *fpt, void **thread, int fd,
void *payload);
static int pcep_lib_pceplib_socket_write_cb(void *fpt, void **thread, int fd,
void *payload);
static int pcep_lib_socket_read_ready(struct thread *thread);
static int pcep_lib_socket_write_ready(struct thread *thread);
/* pceplib pcep_event callbacks */
static void pcep_lib_pceplib_event_cb(void *fpt, pcep_event *event);
/* pceplib pthread creation callback */
static int pcep_lib_pthread_create_cb(pthread_t *pthread_id,
const pthread_attr_t *attr,
void *(*start_routine)(void *),
void *data, const char *thread_name);
void *pcep_lib_pthread_start_passthrough(void *data);
int pcep_lib_pthread_stop_cb(struct frr_pthread *, void **);
/* Internal functions */
static double_linked_list *pcep_lib_format_path(struct pcep_caps *caps,
struct path *path);
static void pcep_lib_format_constraints(struct path *path,
double_linked_list *objs);
static void pcep_lib_parse_open(struct pcep_caps *caps,
struct pcep_object_open *open);
static void
pcep_lib_parse_open_pce_capability(struct pcep_caps *caps,
struct pcep_object_tlv_header *tlv_header);
static void
pcep_lib_parse_open_objfun_list(struct pcep_caps *caps,
struct pcep_object_tlv_header *tlv_header);
static void pcep_lib_parse_rp(struct path *path, struct pcep_object_rp *rp);
static void pcep_lib_parse_srp(struct path *path, struct pcep_object_srp *srp);
static void pcep_lib_parse_lsp(struct path *path, struct pcep_object_lsp *lsp);
static void pcep_lib_parse_lspa(struct path *path,
struct pcep_object_lspa *lspa);
static void pcep_lib_parse_metric(struct path *path,
struct pcep_object_metric *obj);
static void pcep_lib_parse_ero(struct path *path, struct pcep_object_ro *ero);
static struct path_hop *pcep_lib_parse_ero_sr(struct path_hop *next,
struct pcep_ro_subobj_sr *sr);
static struct counters_group *copy_counter_group(struct counters_group *from);
static struct counters_subgroup *
copy_counter_subgroup(struct counters_subgroup *from);
static struct counter *copy_counter(struct counter *from);
static void free_counter_group(struct counters_group *group);
static void free_counter_subgroup(struct counters_subgroup *subgroup);
static void free_counter(struct counter *counter);
struct pcep_lib_pthread_passthrough_data {
void *(*start_routine)(void *data);
void *data;
};
/* ------------ API Functions ------------ */
int pcep_lib_initialize(struct frr_pthread *fpt)
{
PCEP_DEBUG("Initializing pceplib");
/* Register pceplib logging callback */
register_logger(pceplib_logging_cb);
/* Its ok that this object goes out of scope, as it
* wont be stored, and its values will be copied */
struct pceplib_infra_config infra = {
/* Memory infrastructure */
.pceplib_infra_mt = MTYPE_PCEPLIB_INFRA,
.pceplib_messages_mt = MTYPE_PCEPLIB_MESSAGES,
.malloc_func = (pceplib_malloc_func)qmalloc,
.calloc_func = (pceplib_calloc_func)qcalloc,
.realloc_func = (pceplib_realloc_func)qrealloc,
.strdup_func = (pceplib_strdup_func)qstrdup,
.free_func = (pceplib_free_func)qfree,
/* Timers infrastructure */
.external_infra_data = fpt,
.socket_read_func = pcep_lib_pceplib_socket_read_cb,
.socket_write_func = pcep_lib_pceplib_socket_write_cb,
/* PCEP events */
.pcep_event_func = pcep_lib_pceplib_event_cb,
/* PCEPlib pthread creation callback */
.pthread_create_func = pcep_lib_pthread_create_cb};
if (!initialize_pcc_infra(&infra)) {
flog_err(EC_PATH_PCEP_PCC_INIT, "failed to initialize pceplib");
return 1;
}
return 0;
}
void pcep_lib_finalize(void)
{
PCEP_DEBUG("Finalizing pceplib");
if (!destroy_pcc()) {
flog_err(EC_PATH_PCEP_PCC_FINI, "failed to finalize pceplib");
}
}
pcep_session *
pcep_lib_connect(struct ipaddr *src_addr, int src_port, struct ipaddr *dst_addr,
int dst_port, short msd,
const struct pcep_config_group_opts *pcep_options)
{
pcep_configuration *config;
pcep_session *sess;
config = create_default_pcep_configuration();
config->dst_pcep_port = dst_port;
config->src_pcep_port = src_port;
if (IS_IPADDR_V6(src_addr)) {
config->is_src_ipv6 = true;
memcpy(&config->src_ip.src_ipv6, &src_addr->ipaddr_v6,
sizeof(struct in6_addr));
} else {
config->is_src_ipv6 = false;
config->src_ip.src_ipv4 = src_addr->ipaddr_v4;
}
config->support_stateful_pce_lsp_update = true;
config->support_pce_lsp_instantiation = false;
config->support_include_db_version = false;
config->support_lsp_triggered_resync = false;
config->support_lsp_delta_sync = false;
config->support_pce_triggered_initial_sync = false;
config->support_sr_te_pst = true;
config->pcc_can_resolve_nai_to_sid = false;
config->max_sid_depth = msd;
config->pcep_msg_versioning->draft_ietf_pce_segment_routing_07 =
pcep_options->draft07;
config->keep_alive_seconds = pcep_options->keep_alive_seconds;
config->min_keep_alive_seconds = pcep_options->min_keep_alive_seconds;
config->max_keep_alive_seconds = pcep_options->max_keep_alive_seconds;
config->dead_timer_seconds = pcep_options->dead_timer_seconds;
config->min_dead_timer_seconds = pcep_options->min_dead_timer_seconds;
config->max_dead_timer_seconds = pcep_options->max_dead_timer_seconds;
config->request_time_seconds = pcep_options->pcep_request_time_seconds;
/* TODO when available in the pceplib, set it here
pcep_options->state_timeout_inteval_seconds;*/
if (pcep_options->tcp_md5_auth[0] != '\0') {
config->is_tcp_auth_md5 = true;
strlcpy(config->tcp_authentication_str,
pcep_options->tcp_md5_auth,
sizeof(config->tcp_authentication_str));
} else {
config->is_tcp_auth_md5 = false;
}
if (IS_IPADDR_V6(dst_addr)) {
sess = connect_pce_ipv6(config, &dst_addr->ipaddr_v6);
} else {
sess = connect_pce(config, &dst_addr->ipaddr_v4);
}
destroy_pcep_configuration(config);
return sess;
}
void pcep_lib_disconnect(pcep_session *sess)
{
assert(sess != NULL);
disconnect_pce(sess);
}
/* Callback passed to pceplib to write to a socket.
* When the socket is ready to be written to,
* pcep_lib_socket_write_ready() will be called */
int pcep_lib_pceplib_socket_write_cb(void *fpt, void **thread, int fd,
void *payload)
{
return pcep_thread_socket_write(fpt, thread, fd, payload,
pcep_lib_socket_write_ready);
}
/* Callback passed to pceplib to read from a socket.
* When the socket is ready to be read from,
* pcep_lib_socket_read_ready() will be called */
int pcep_lib_pceplib_socket_read_cb(void *fpt, void **thread, int fd,
void *payload)
{
return pcep_thread_socket_read(fpt, thread, fd, payload,
pcep_lib_socket_read_ready);
}
/* Callbacks called by path_pcep_controller when a socket is ready to read/write
*/
int pcep_lib_socket_write_ready(struct thread *thread)
{
struct pcep_ctrl_socket_data *data = THREAD_ARG(thread);
assert(data != NULL);
int retval = pceplib_external_socket_write(data->fd, data->payload);
XFREE(MTYPE_PCEP, data);
return retval;
}
int pcep_lib_socket_read_ready(struct thread *thread)
{
struct pcep_ctrl_socket_data *data = THREAD_ARG(thread);
assert(data != NULL);
int retval = pceplib_external_socket_read(data->fd, data->payload);
XFREE(MTYPE_PCEP, data);
return retval;
}
/* Callback passed to pceplib when a pcep_event is ready */
void pcep_lib_pceplib_event_cb(void *fpt, pcep_event *event)
{
pcep_thread_send_ctrl_event(fpt, event, pcep_thread_pcep_event);
}
/* Wrapper function around the actual pceplib thread start function */
void *pcep_lib_pthread_start_passthrough(void *data)
{
struct frr_pthread *fpt = data;
struct pcep_lib_pthread_passthrough_data *passthrough_data = fpt->data;
void *start_routine_data = passthrough_data->data;
void *(*start_routine)(void *) = passthrough_data->start_routine;
XFREE(MTYPE_PCEP, passthrough_data);
if (start_routine != NULL) {
return start_routine(start_routine_data);
}
return NULL;
}
int pcep_lib_pthread_create_cb(pthread_t *thread_id, const pthread_attr_t *attr,
void *(*start_routine)(void *), void *data,
const char *thread_name)
{
/* Since FRR calls the start_routine with a struct frr_pthread,
* we have to store the real data and callback in a passthrough
* and pass the actual data the start_routine needs */
struct pcep_lib_pthread_passthrough_data *passthrough_data = XMALLOC(
MTYPE_PCEP, sizeof(struct pcep_lib_pthread_passthrough_data));
passthrough_data->data = data;
passthrough_data->start_routine = start_routine;
struct frr_pthread_attr fpt_attr = {
.start = pcep_lib_pthread_start_passthrough,
.stop = pcep_lib_pthread_stop_cb};
struct frr_pthread *fpt =
frr_pthread_new(&fpt_attr, thread_name, "pcep_lib");
if (fpt == NULL) {
return 1;
}
fpt->data = passthrough_data;
int retval = frr_pthread_run(fpt, attr);
if (retval) {
return retval;
}
*thread_id = fpt->thread;
return 0;
}
int pcep_lib_pthread_stop_cb(struct frr_pthread *fpt, void **res)
{
pcep_lib_finalize();
frr_pthread_destroy(fpt);
return 0;
}
struct pcep_message *pcep_lib_format_report(struct pcep_caps *caps,
struct path *path)
{
double_linked_list *objs = pcep_lib_format_path(caps, path);
return pcep_msg_create_report(objs);
}
static struct pcep_object_rp *create_rp(uint32_t reqid)
{
double_linked_list *rp_tlvs;
struct pcep_object_tlv_path_setup_type *setup_type_tlv;
struct pcep_object_rp *rp;
rp_tlvs = dll_initialize();
setup_type_tlv = pcep_tlv_create_path_setup_type(SR_TE_PST);
dll_append(rp_tlvs, setup_type_tlv);
rp = pcep_obj_create_rp(0, false, false, false, true, reqid, rp_tlvs);
return rp;
}
struct pcep_message *pcep_lib_format_request(struct pcep_caps *caps,
struct path *path)
{
struct ipaddr *src = &path->pcc_addr;
struct ipaddr *dst = &path->nbkey.endpoint;
double_linked_list *objs;
struct pcep_object_rp *rp;
struct pcep_object_endpoints_ipv4 *endpoints_ipv4;
struct pcep_object_endpoints_ipv6 *endpoints_ipv6;
struct pcep_object_objective_function *of = NULL;
enum objfun_type objfun = OBJFUN_UNDEFINED;
assert(src->ipa_type == dst->ipa_type);
objs = dll_initialize();
rp = create_rp(path->req_id);
rp->header.flag_p = true;
pcep_lib_format_constraints(path, objs);
/* Objective Function */
if (path->has_pcc_objfun) {
objfun = path->pcc_objfun;
}
if (objfun != OBJFUN_UNDEFINED) {
of = pcep_obj_create_objective_function(objfun, NULL);
assert(of != NULL);
of->header.flag_p = path->enforce_pcc_objfun;
dll_append(objs, of);
}
if (IS_IPADDR_V6(src)) {
endpoints_ipv6 = pcep_obj_create_endpoint_ipv6(&src->ipaddr_v6,
&dst->ipaddr_v6);
endpoints_ipv6->header.flag_p = true;
return pcep_msg_create_request_ipv6(rp, endpoints_ipv6, objs);
} else {
endpoints_ipv4 = pcep_obj_create_endpoint_ipv4(&src->ipaddr_v4,
&dst->ipaddr_v4);
endpoints_ipv4->header.flag_p = true;
return pcep_msg_create_request(rp, endpoints_ipv4, objs);
}
}
struct pcep_message *pcep_lib_format_error(int error_type, int error_value)
{
return pcep_msg_create_error(error_type, error_value);
}
struct pcep_message *pcep_lib_format_request_cancelled(uint32_t reqid)
{
struct pcep_object_notify *notify;
double_linked_list *objs;
struct pcep_object_rp *rp;
notify = pcep_obj_create_notify(
PCEP_NOTIFY_TYPE_PENDING_REQUEST_CANCELLED,
PCEP_NOTIFY_VALUE_PCC_CANCELLED_REQUEST);
objs = dll_initialize();
rp = create_rp(reqid);
dll_append(objs, rp);
return pcep_msg_create_notify(notify, objs);
}
struct path *pcep_lib_parse_path(struct pcep_message *msg)
{
struct path *path;
double_linked_list *objs = msg->obj_list;
double_linked_list_node *node;
struct pcep_object_header *obj;
struct pcep_object_rp *rp = NULL;
struct pcep_object_srp *srp = NULL;
struct pcep_object_lsp *lsp = NULL;
struct pcep_object_lspa *lspa = NULL;
struct pcep_object_ro *ero = NULL;
struct pcep_object_metric *metric = NULL;
struct pcep_object_bandwidth *bandwidth = NULL;
struct pcep_object_objective_function *of = NULL;
path = pcep_new_path();
for (node = objs->head; node != NULL; node = node->next_node) {
obj = (struct pcep_object_header *)node->data;
switch (CLASS_TYPE(obj->object_class, obj->object_type)) {
case CLASS_TYPE(PCEP_OBJ_CLASS_RP, PCEP_OBJ_TYPE_RP):
assert(rp == NULL);
rp = (struct pcep_object_rp *)obj;
pcep_lib_parse_rp(path, rp);
break;
case CLASS_TYPE(PCEP_OBJ_CLASS_SRP, PCEP_OBJ_TYPE_SRP):
assert(srp == NULL);
srp = (struct pcep_object_srp *)obj;
pcep_lib_parse_srp(path, srp);
break;
case CLASS_TYPE(PCEP_OBJ_CLASS_LSP, PCEP_OBJ_TYPE_LSP):
/* Only support single LSP per message */
assert(lsp == NULL);
lsp = (struct pcep_object_lsp *)obj;
pcep_lib_parse_lsp(path, lsp);
break;
case CLASS_TYPE(PCEP_OBJ_CLASS_LSPA, PCEP_OBJ_TYPE_LSPA):
assert(lspa == NULL);
lspa = (struct pcep_object_lspa *)obj;
pcep_lib_parse_lspa(path, lspa);
break;
case CLASS_TYPE(PCEP_OBJ_CLASS_ERO, PCEP_OBJ_TYPE_ERO):
/* Only support single ERO per message */
assert(ero == NULL);
ero = (struct pcep_object_ro *)obj;
pcep_lib_parse_ero(path, ero);
break;
case CLASS_TYPE(PCEP_OBJ_CLASS_METRIC, PCEP_OBJ_TYPE_METRIC):
metric = (struct pcep_object_metric *)obj;
pcep_lib_parse_metric(path, metric);
break;
case CLASS_TYPE(PCEP_OBJ_CLASS_BANDWIDTH,
PCEP_OBJ_TYPE_BANDWIDTH_REQ):
case CLASS_TYPE(PCEP_OBJ_CLASS_BANDWIDTH,
PCEP_OBJ_TYPE_BANDWIDTH_CISCO):
bandwidth = (struct pcep_object_bandwidth *)obj;
path->has_bandwidth = true;
path->bandwidth = bandwidth->bandwidth;
break;
case CLASS_TYPE(PCEP_OBJ_CLASS_NOPATH, PCEP_OBJ_TYPE_NOPATH):
path->no_path = true;
break;
case CLASS_TYPE(PCEP_OBJ_CLASS_OF, PCEP_OBJ_TYPE_OF):
of = (struct pcep_object_objective_function *)obj;
path->has_pce_objfun = true;
path->pce_objfun = of->of_code;
break;
default:
flog_warn(EC_PATH_PCEP_UNEXPECTED_PCEP_OBJECT,
"Unexpected PCEP object %s (%u) / %s (%u)",
pcep_object_class_name(obj->object_class),
obj->object_class,
pcep_object_type_name(obj->object_class,
obj->object_type),
obj->object_type);
break;
}
}
return path;
}
void pcep_lib_parse_capabilities(struct pcep_message *msg,
struct pcep_caps *caps)
{
double_linked_list *objs = msg->obj_list;
double_linked_list_node *node;
struct pcep_object_header *obj;
struct pcep_object_open *open = NULL;
for (node = objs->head; node != NULL; node = node->next_node) {
obj = (struct pcep_object_header *)node->data;
switch (CLASS_TYPE(obj->object_class, obj->object_type)) {
case CLASS_TYPE(PCEP_OBJ_CLASS_OPEN, PCEP_OBJ_TYPE_OPEN):
assert(open == NULL);
open = (struct pcep_object_open *)obj;
pcep_lib_parse_open(caps, open);
break;
default:
flog_warn(EC_PATH_PCEP_UNEXPECTED_PCEP_OBJECT,
"Unexpected PCEP object %s (%u) / %s (%u)",
pcep_object_class_name(obj->object_class),
obj->object_class,
pcep_object_type_name(obj->object_class,
obj->object_type),
obj->object_type);
break;
}
}
}
struct counters_group *pcep_lib_copy_counters(pcep_session *sess)
{
if (!sess || !sess->pcep_session_counters) {
return NULL;
}
return copy_counter_group(sess->pcep_session_counters);
}
void pcep_lib_free_counters(struct counters_group *counters)
{
free_counter_group(counters);
}
pcep_session *pcep_lib_copy_pcep_session(pcep_session *sess)
{
if (!sess) {
return NULL;
}
pcep_session *copy;
copy = XCALLOC(MTYPE_PCEP, sizeof(*copy));
memcpy(copy, sess, sizeof(*copy));
/* These fields should not be accessed */
copy->num_unknown_messages_time_queue = NULL;
copy->socket_comm_session = NULL;
copy->pcep_session_counters = NULL;
return copy;
}
/* ------------ pceplib logging callback ------------ */
int pceplib_logging_cb(int priority, const char *fmt, va_list args)
{
char buffer[1024];
vsnprintf(buffer, sizeof(buffer), fmt, args);
PCEP_DEBUG_PCEPLIB(priority, "pceplib: %s", buffer);
return 0;
}
/* ------------ Internal Functions ------------ */
double_linked_list *pcep_lib_format_path(struct pcep_caps *caps,
struct path *path)
{
struct in_addr addr_null;
double_linked_list *objs, *srp_tlvs, *lsp_tlvs, *ero_objs;
struct pcep_object_tlv_header *tlv;
struct pcep_object_ro_subobj *ero_obj;
struct pcep_object_srp *srp;
struct pcep_object_lsp *lsp;
struct pcep_object_ro *ero;
uint32_t encoded_binding_sid;
char binding_sid_lsp_tlv_data[6];
memset(&addr_null, 0, sizeof(addr_null));
objs = dll_initialize();
if (path->plsp_id != 0) {
/* SRP object */
srp_tlvs = dll_initialize();
tlv = (struct pcep_object_tlv_header *)
pcep_tlv_create_path_setup_type(SR_TE_PST);
assert(tlv != NULL);
dll_append(srp_tlvs, tlv);
srp = pcep_obj_create_srp(path->do_remove, path->srp_id,
srp_tlvs);
assert(srp != NULL);
srp->header.flag_p = true;
dll_append(objs, srp);
}
/* LSP object */
lsp_tlvs = dll_initialize();
if (path->plsp_id == 0 || IS_IPADDR_NONE(&path->nbkey.endpoint)
|| IS_IPADDR_NONE(&path->pcc_addr)) {
tlv = (struct pcep_object_tlv_header *)
pcep_tlv_create_ipv4_lsp_identifiers(
&addr_null, &addr_null, 0, 0, &addr_null);
} else {
assert(path->pcc_addr.ipa_type
== path->nbkey.endpoint.ipa_type);
if (IS_IPADDR_V4(&path->pcc_addr)) {
tlv = (struct pcep_object_tlv_header *)
pcep_tlv_create_ipv4_lsp_identifiers(
&path->pcc_addr.ipaddr_v4,
&path->nbkey.endpoint.ipaddr_v4, 0, 0,
&path->pcc_addr.ipaddr_v4);
} else {
tlv = (struct pcep_object_tlv_header *)
pcep_tlv_create_ipv6_lsp_identifiers(
&path->pcc_addr.ipaddr_v6,
&path->nbkey.endpoint.ipaddr_v6, 0, 0,
&path->pcc_addr.ipaddr_v6);
}
}
assert(tlv != NULL);
dll_append(lsp_tlvs, tlv);
if (path->name != NULL) {
tlv = (struct pcep_object_tlv_header *)
/*FIXME: Remove the typecasty when pceplib is changed
to take a const char* */
pcep_tlv_create_symbolic_path_name((char *)path->name,
strlen(path->name));
assert(tlv != NULL);
dll_append(lsp_tlvs, tlv);
}
if ((path->plsp_id != 0) && (path->binding_sid != MPLS_LABEL_NONE)) {
memset(binding_sid_lsp_tlv_data, 0, 2);
encoded_binding_sid = htonl(path->binding_sid << 12);
memcpy(binding_sid_lsp_tlv_data + 2, &encoded_binding_sid, 4);
tlv = (struct pcep_object_tlv_header *)
pcep_tlv_create_tlv_arbitrary(
binding_sid_lsp_tlv_data,
sizeof(binding_sid_lsp_tlv_data), 65505);
assert(tlv != NULL);
dll_append(lsp_tlvs, tlv);
}
lsp = pcep_obj_create_lsp(
path->plsp_id, path->status, path->was_created /* C Flag */,
path->go_active /* A Flag */, path->was_removed /* R Flag */,
path->is_synching /* S Flag */, path->is_delegated /* D Flag */,
lsp_tlvs);
assert(lsp != NULL);
lsp->header.flag_p = true;
dll_append(objs, lsp);
/* ERO object */
ero_objs = dll_initialize();
for (struct path_hop *hop = path->first_hop; hop != NULL;
hop = hop->next) {
uint32_t sid;
/* Only supporting MPLS hops with both sid and nai */
assert(hop->is_mpls);
assert(hop->has_sid);
if (hop->has_attribs) {
sid = ENCODE_SR_ERO_SID(hop->sid.mpls.label,
hop->sid.mpls.traffic_class,
hop->sid.mpls.is_bottom,
hop->sid.mpls.ttl);
} else {
sid = ENCODE_SR_ERO_SID(hop->sid.mpls.label, 0, 0, 0);
}
ero_obj = NULL;
if (hop->has_nai) {
assert(hop->nai.type != PCEP_SR_SUBOBJ_NAI_ABSENT);
assert(hop->nai.type
!= PCEP_SR_SUBOBJ_NAI_LINK_LOCAL_IPV6_ADJACENCY);
assert(hop->nai.type != PCEP_SR_SUBOBJ_NAI_UNKNOWN);
switch (hop->nai.type) {
case PCEP_SR_SUBOBJ_NAI_IPV4_NODE:
ero_obj = (struct pcep_object_ro_subobj *)
pcep_obj_create_ro_subobj_sr_ipv4_node(
hop->is_loose, !hop->has_sid,
hop->has_attribs, /* C Flag */
hop->is_mpls, /* M Flag */
sid,
&hop->nai.local_addr.ipaddr_v4);
break;
case PCEP_SR_SUBOBJ_NAI_IPV6_NODE:
ero_obj = (struct pcep_object_ro_subobj *)
pcep_obj_create_ro_subobj_sr_ipv6_node(
hop->is_loose, !hop->has_sid,
hop->has_attribs, /* C Flag */
hop->is_mpls, /* M Flag */
sid,
&hop->nai.local_addr.ipaddr_v6);
break;
case PCEP_SR_SUBOBJ_NAI_IPV4_ADJACENCY:
ero_obj = (struct pcep_object_ro_subobj *)
pcep_obj_create_ro_subobj_sr_ipv4_adj(
hop->is_loose, !hop->has_sid,
hop->has_attribs, /* C Flag */
hop->is_mpls, /* M Flag */
sid,
&hop->nai.local_addr.ipaddr_v4,
&hop->nai.remote_addr
.ipaddr_v4);
break;
case PCEP_SR_SUBOBJ_NAI_IPV6_ADJACENCY:
ero_obj = (struct pcep_object_ro_subobj *)
pcep_obj_create_ro_subobj_sr_ipv6_adj(
hop->is_loose, !hop->has_sid,
hop->has_attribs, /* C Flag */
hop->is_mpls, /* M Flag */
sid,
&hop->nai.local_addr.ipaddr_v6,
&hop->nai.remote_addr
.ipaddr_v6);
break;
case PCEP_SR_SUBOBJ_NAI_UNNUMBERED_IPV4_ADJACENCY:
ero_obj = (struct pcep_object_ro_subobj *)
pcep_obj_create_ro_subobj_sr_unnumbered_ipv4_adj(
hop->is_loose, !hop->has_sid,
hop->has_attribs, /* C Flag */
hop->is_mpls, /* M Flag */
sid,
hop->nai.local_addr.ipaddr_v4
.s_addr,
hop->nai.local_iface,
hop->nai.remote_addr.ipaddr_v4
.s_addr,
hop->nai.remote_iface);
break;
default:
break;
}
}
if (ero_obj == NULL) {
ero_obj = (struct pcep_object_ro_subobj *)
pcep_obj_create_ro_subobj_sr_nonai(
hop->is_loose, sid,
hop->has_attribs, /* C Flag */
hop->is_mpls); /* M Flag */
}
dll_append(ero_objs, ero_obj);
}
ero = pcep_obj_create_ero(ero_objs);
assert(ero != NULL);
ero->header.flag_p = true;
dll_append(objs, ero);
if (path->plsp_id == 0) {
return objs;
}
pcep_lib_format_constraints(path, objs);
return objs;
}
void pcep_lib_format_constraints(struct path *path, double_linked_list *objs)
{
struct pcep_object_metric *metric;
struct pcep_object_bandwidth *bandwidth;
struct pcep_object_lspa *lspa;
/* LSPA object */
if (path->has_affinity_filters) {
lspa = pcep_obj_create_lspa(
path->affinity_filters[AFFINITY_FILTER_EXCLUDE_ANY - 1],
path->affinity_filters[AFFINITY_FILTER_INCLUDE_ANY - 1],
path->affinity_filters[AFFINITY_FILTER_INCLUDE_ALL - 1],
DEFAULT_LSAP_SETUP_PRIO, DEFAULT_LSAP_HOLDING_PRIO,
DEFAULT_LSAP_LOCAL_PRETECTION);
assert(lspa != NULL);
lspa->header.flag_p = true;
dll_append(objs, lspa);
}
/* Bandwidth Objects */
if (path->has_bandwidth) {
/* Requested Bandwidth */
bandwidth = pcep_obj_create_bandwidth(path->bandwidth);
assert(bandwidth != NULL);
bandwidth->header.flag_p = path->enforce_bandwidth;
dll_append(objs, bandwidth);
}
/* Metric Objects */
for (struct path_metric *m = path->first_metric; m != NULL;
m = m->next) {
metric = pcep_obj_create_metric(m->type, m->is_bound,
m->is_computed, m->value);
assert(metric != NULL);
metric->header.flag_p = m->enforce;
dll_append(objs, metric);
}
}
void pcep_lib_parse_open(struct pcep_caps *caps, struct pcep_object_open *open)
{
double_linked_list *tlvs = open->header.tlv_list;
double_linked_list_node *node;
struct pcep_object_tlv_header *tlv_header;
caps->is_stateful = false;
caps->supported_ofs_are_known = false;
caps->supported_ofs = 0;
for (node = tlvs->head; node != NULL; node = node->next_node) {
tlv_header = (struct pcep_object_tlv_header *)node->data;
switch (tlv_header->type) {
case PCEP_OBJ_TLV_TYPE_STATEFUL_PCE_CAPABILITY:
pcep_lib_parse_open_pce_capability(caps, tlv_header);
break;
case PCEP_OBJ_TLV_TYPE_SR_PCE_CAPABILITY:
break;
case PCEP_OBJ_TLV_TYPE_OBJECTIVE_FUNCTION_LIST:
pcep_lib_parse_open_objfun_list(caps, tlv_header);
break;
default:
flog_warn(EC_PATH_PCEP_UNEXPECTED_PCEP_TLV,
"Unexpected OPEN's TLV %s (%u)",
pcep_tlv_type_name(tlv_header->type),
tlv_header->type);
break;
}
}
}
void pcep_lib_parse_open_pce_capability(
struct pcep_caps *caps, struct pcep_object_tlv_header *tlv_header)
{
struct pcep_object_tlv_stateful_pce_capability *tlv;
tlv = (struct pcep_object_tlv_stateful_pce_capability *)tlv_header;
caps->is_stateful = tlv->flag_u_lsp_update_capability;
}
void pcep_lib_parse_open_objfun_list(struct pcep_caps *caps,
struct pcep_object_tlv_header *tlv_header)
{
double_linked_list_node *node;
struct pcep_object_tlv_of_list *tlv;
tlv = (struct pcep_object_tlv_of_list *)tlv_header;
uint16_t of_code;
caps->supported_ofs_are_known = true;
for (node = tlv->of_list->head; node != NULL; node = node->next_node) {
of_code = *(uint16_t *)node->data;
if (of_code >= 32) {
zlog_warn(
"Ignoring unexpected objective function with code %u",
of_code);
continue;
}
SET_FLAG(caps->supported_ofs, of_code);
}
}
void pcep_lib_parse_rp(struct path *path, struct pcep_object_rp *rp)
{
double_linked_list *tlvs = rp->header.tlv_list;
double_linked_list_node *node;
struct pcep_object_tlv_header *tlv;
/* We ignore the other flags and priority for now */
path->req_id = rp->request_id;
path->has_pce_objfun = false;
path->pce_objfun = OBJFUN_UNDEFINED;
for (node = tlvs->head; node != NULL; node = node->next_node) {
tlv = (struct pcep_object_tlv_header *)node->data;
switch (tlv->type) {
case PCEP_OBJ_TLV_TYPE_PATH_SETUP_TYPE:
// TODO: enforce the path setup type is SR_TE_PST
break;
default:
flog_warn(EC_PATH_PCEP_UNEXPECTED_PCEP_TLV,
"Unexpected RP's TLV %s (%u)",
pcep_tlv_type_name(tlv->type), tlv->type);
break;
}
}
}
void pcep_lib_parse_srp(struct path *path, struct pcep_object_srp *srp)
{
double_linked_list *tlvs = srp->header.tlv_list;
double_linked_list_node *node;
struct pcep_object_tlv_header *tlv;
path->do_remove = srp->flag_lsp_remove;
path->srp_id = srp->srp_id_number;
for (node = tlvs->head; node != NULL; node = node->next_node) {
tlv = (struct pcep_object_tlv_header *)node->data;
switch (tlv->type) {
case PCEP_OBJ_TLV_TYPE_PATH_SETUP_TYPE:
// TODO: enforce the path setup type is SR_TE_PST
break;
default:
flog_warn(EC_PATH_PCEP_UNEXPECTED_PCEP_TLV,
"Unexpected SRP's TLV %s (%u)",
pcep_tlv_type_name(tlv->type), tlv->type);
break;
}
}
}
void pcep_lib_parse_lsp(struct path *path, struct pcep_object_lsp *lsp)
{
double_linked_list *tlvs = lsp->header.tlv_list;
double_linked_list_node *node;
struct pcep_object_tlv_header *tlv;
path->plsp_id = lsp->plsp_id;
path->status = lsp->operational_status;
path->go_active = lsp->flag_a;
path->was_created = lsp->flag_c;
path->was_removed = lsp->flag_r;
path->is_synching = lsp->flag_s;
path->is_delegated = lsp->flag_d;
if (tlvs == NULL)
return;
for (node = tlvs->head; node != NULL; node = node->next_node) {
tlv = (struct pcep_object_tlv_header *)node->data;
switch (tlv->type) {
default:
flog_warn(EC_PATH_PCEP_UNEXPECTED_PCEP_TLV,
"Unexpected LSP TLV %s (%u)",
pcep_tlv_type_name(tlv->type), tlv->type);
break;
}
}
}
void pcep_lib_parse_lspa(struct path *path, struct pcep_object_lspa *lspa)
{
path->has_affinity_filters = true;
path->affinity_filters[AFFINITY_FILTER_EXCLUDE_ANY - 1] =
lspa->lspa_exclude_any;
path->affinity_filters[AFFINITY_FILTER_INCLUDE_ANY - 1] =
lspa->lspa_include_any;
path->affinity_filters[AFFINITY_FILTER_INCLUDE_ALL - 1] =
lspa->lspa_include_all;
}
void pcep_lib_parse_metric(struct path *path, struct pcep_object_metric *obj)
{
struct path_metric *metric;
metric = pcep_new_metric();
metric->type = obj->type;
metric->is_bound = obj->flag_b;
metric->is_computed = obj->flag_c;
metric->value = obj->value;
metric->next = path->first_metric;
path->first_metric = metric;
}
void pcep_lib_parse_ero(struct path *path, struct pcep_object_ro *ero)
{
struct path_hop *hop = NULL;
double_linked_list *objs = ero->sub_objects;
double_linked_list_node *node;
struct pcep_object_ro_subobj *obj;
for (node = objs->tail; node != NULL; node = node->prev_node) {
obj = (struct pcep_object_ro_subobj *)node->data;
switch (obj->ro_subobj_type) {
case RO_SUBOBJ_TYPE_SR:
hop = pcep_lib_parse_ero_sr(
hop, (struct pcep_ro_subobj_sr *)obj);
break;
default:
flog_warn(EC_PATH_PCEP_UNEXPECTED_PCEP_ERO_SUBOBJ,
"Unexpected ERO sub-object %s (%u)",
pcep_ro_type_name(obj->ro_subobj_type),
obj->ro_subobj_type);
break;
}
}
path->first_hop = hop;
}
struct path_hop *pcep_lib_parse_ero_sr(struct path_hop *next,
struct pcep_ro_subobj_sr *sr)
{
struct path_hop *hop = NULL;
union sid sid;
/* Only support IPv4 node with SID */
assert(!sr->flag_s);
if (sr->flag_m) {
sid.mpls = (struct sid_mpls){
.label = GET_SR_ERO_SID_LABEL(sr->sid),
.traffic_class = GET_SR_ERO_SID_TC(sr->sid),
.is_bottom = GET_SR_ERO_SID_S(sr->sid),
.ttl = GET_SR_ERO_SID_TTL(sr->sid)};
} else {
sid.value = sr->sid;
}
hop = pcep_new_hop();