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pim_upstream.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* PIM for Quagga
* Copyright (C) 2008 Everton da Silva Marques
*/
#include <zebra.h>
#include "log.h"
#include "zclient.h"
#include "memory.h"
#include "frrevent.h"
#include "linklist.h"
#include "vty.h"
#include "plist.h"
#include "hash.h"
#include "jhash.h"
#include "wheel.h"
#include "network.h"
#include "frrdistance.h"
#include "pimd.h"
#include "pim_pim.h"
#include "pim_str.h"
#include "pim_time.h"
#include "pim_iface.h"
#include "pim_join.h"
#include "pim_zlookup.h"
#include "pim_upstream.h"
#include "pim_ifchannel.h"
#include "pim_neighbor.h"
#include "pim_rpf.h"
#include "pim_zebra.h"
#include "pim_oil.h"
#include "pim_macro.h"
#include "pim_rp.h"
#include "pim_register.h"
#include "pim_msdp.h"
#include "pim_jp_agg.h"
#include "pim_nht.h"
#include "pim_ssm.h"
#include "pim_vxlan.h"
#include "pim_mlag.h"
static void join_timer_stop(struct pim_upstream *up);
static void
pim_upstream_update_assert_tracking_desired(struct pim_upstream *up);
static bool pim_upstream_sg_running_proc(struct pim_upstream *up);
/*
* A (*,G) or a (*,*) is going away
* remove the parent pointer from
* those pointing at us
*/
static void pim_upstream_remove_children(struct pim_instance *pim,
struct pim_upstream *up)
{
struct pim_upstream *child;
if (!up->sources)
return;
while (!list_isempty(up->sources)) {
child = listnode_head(up->sources);
listnode_delete(up->sources, child);
if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(child->flags)) {
PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(child->flags);
child = pim_upstream_del(pim, child, __func__);
}
if (child) {
child->parent = NULL;
if (PIM_UPSTREAM_FLAG_TEST_USE_RPT(child->flags))
pim_upstream_mroute_iif_update(
child->channel_oil,
__func__);
}
}
list_delete(&up->sources);
}
/*
* A (*,G) or a (*,*) is being created
* Find the children that would point
* at us.
*/
static void pim_upstream_find_new_children(struct pim_instance *pim,
struct pim_upstream *up)
{
struct pim_upstream *child;
if (!pim_addr_is_any(up->sg.src) && !pim_addr_is_any(up->sg.grp))
return;
if (pim_addr_is_any(up->sg.src) && pim_addr_is_any(up->sg.grp))
return;
frr_each (rb_pim_upstream, &pim->upstream_head, child) {
if (!pim_addr_is_any(up->sg.grp) &&
!pim_addr_cmp(child->sg.grp, up->sg.grp) && (child != up)) {
child->parent = up;
listnode_add_sort(up->sources, child);
if (PIM_UPSTREAM_FLAG_TEST_USE_RPT(child->flags))
pim_upstream_mroute_iif_update(
child->channel_oil,
__func__);
}
}
}
/*
* If we have a (*,*) || (S,*) there is no parent
* If we have a (S,G), find the (*,G)
* If we have a (*,G), find the (*,*)
*/
static struct pim_upstream *pim_upstream_find_parent(struct pim_instance *pim,
struct pim_upstream *child)
{
pim_sgaddr any = child->sg;
struct pim_upstream *up = NULL;
// (S,G)
if (!pim_addr_is_any(child->sg.src) &&
!pim_addr_is_any(child->sg.grp)) {
any.src = PIMADDR_ANY;
up = pim_upstream_find(pim, &any);
if (up)
listnode_add(up->sources, child);
/*
* In case parent is MLAG entry copy the data to child
*/
if (up && PIM_UPSTREAM_FLAG_TEST_MLAG_INTERFACE(up->flags)) {
PIM_UPSTREAM_FLAG_SET_MLAG_INTERFACE(child->flags);
if (PIM_UPSTREAM_FLAG_TEST_MLAG_NON_DF(up->flags))
PIM_UPSTREAM_FLAG_SET_MLAG_NON_DF(child->flags);
else
PIM_UPSTREAM_FLAG_UNSET_MLAG_NON_DF(
child->flags);
}
return up;
}
return NULL;
}
static void upstream_channel_oil_detach(struct pim_upstream *up)
{
struct channel_oil *channel_oil = up->channel_oil;
if (channel_oil) {
/* Detaching from channel_oil, channel_oil may exist post del,
but upstream would not keep reference of it
*/
channel_oil->up = NULL;
up->channel_oil = NULL;
/* attempt to delete channel_oil; if channel_oil is being held
* because of other references cleanup info such as "Mute"
* inferred from the parent upstream
*/
pim_channel_oil_upstream_deref(channel_oil);
}
}
static void pim_upstream_timers_stop(struct pim_upstream *up)
{
EVENT_OFF(up->t_ka_timer);
EVENT_OFF(up->t_rs_timer);
EVENT_OFF(up->t_msdp_reg_timer);
EVENT_OFF(up->t_join_timer);
}
struct pim_upstream *pim_upstream_del(struct pim_instance *pim,
struct pim_upstream *up, const char *name)
{
struct listnode *node, *nnode;
struct pim_ifchannel *ch;
bool notify_msdp = false;
if (PIM_DEBUG_PIM_TRACE)
zlog_debug(
"%s(%s): Delete %s[%s] ref count: %d, flags: %d c_oil ref count %d (Pre decrement)",
__func__, name, up->sg_str, pim->vrf->name,
up->ref_count, up->flags,
up->channel_oil->oil_ref_count);
assert(up->ref_count > 0);
--up->ref_count;
if (up->ref_count >= 1)
return up;
if (PIM_DEBUG_TRACE)
zlog_debug("pim_upstream free vrf:%s %s flags 0x%x",
pim->vrf->name, up->sg_str, up->flags);
if (pim_up_mlag_is_local(up))
pim_mlag_up_local_del(pim, up);
pim_upstream_timers_stop(up);
if (up->join_state == PIM_UPSTREAM_JOINED) {
pim_jp_agg_single_upstream_send(&up->rpf, up, 0);
if (pim_addr_is_any(up->sg.src)) {
/* if a (*, G) entry in the joined state is being
* deleted we
* need to notify MSDP */
notify_msdp = true;
}
}
join_timer_stop(up);
pim_jp_agg_upstream_verification(up, false);
up->rpf.source_nexthop.interface = NULL;
if (!pim_addr_is_any(up->sg.src)) {
if (pim->upstream_sg_wheel)
wheel_remove_item(pim->upstream_sg_wheel, up);
notify_msdp = true;
}
pim_mroute_del(up->channel_oil, __func__);
upstream_channel_oil_detach(up);
for (ALL_LIST_ELEMENTS(up->ifchannels, node, nnode, ch))
pim_ifchannel_delete(ch);
list_delete(&up->ifchannels);
pim_upstream_remove_children(pim, up);
if (up->sources)
list_delete(&up->sources);
if (up->parent && up->parent->sources)
listnode_delete(up->parent->sources, up);
up->parent = NULL;
rb_pim_upstream_del(&pim->upstream_head, up);
if (notify_msdp) {
pim_msdp_up_del(pim, &up->sg);
}
/* When RP gets deleted, pim_rp_del() deregister addr with Zebra NHT
* and assign up->upstream_addr as INADDR_ANY.
* So before de-registering the upstream address, check if is not equal
* to INADDR_ANY. This is done in order to avoid de-registering for
* 255.255.255.255 which is maintained for some reason..
*/
if (!pim_addr_is_any(up->upstream_addr)) {
/* Deregister addr with Zebra NHT */
if (PIM_DEBUG_PIM_TRACE)
zlog_debug(
"%s: Deregister upstream %s addr %pPA with Zebra NHT",
__func__, up->sg_str, &up->upstream_addr);
pim_delete_tracked_nexthop(pim, up->upstream_addr, up, NULL);
}
XFREE(MTYPE_PIM_UPSTREAM, up);
return NULL;
}
void pim_upstream_send_join(struct pim_upstream *up)
{
if (!up->rpf.source_nexthop.interface) {
if (PIM_DEBUG_PIM_TRACE)
zlog_debug("%s: up %s RPF is not present", __func__,
up->sg_str);
return;
}
if (PIM_DEBUG_PIM_TRACE) {
zlog_debug("%s: RPF'%s=%pPA(%s) for Interface %s", __func__,
up->sg_str, &up->rpf.rpf_addr,
pim_upstream_state2str(up->join_state),
up->rpf.source_nexthop.interface->name);
if (pim_rpf_addr_is_inaddr_any(&up->rpf)) {
zlog_debug("%s: can't send join upstream: RPF'%s=%pPA",
__func__, up->sg_str, &up->rpf.rpf_addr);
/* warning only */
}
}
/* send Join(S,G) to the current upstream neighbor */
pim_jp_agg_single_upstream_send(&up->rpf, up, 1 /* join */);
}
static void on_join_timer(struct event *t)
{
struct pim_upstream *up;
up = EVENT_ARG(t);
if (!up->rpf.source_nexthop.interface) {
if (PIM_DEBUG_PIM_TRACE)
zlog_debug("%s: up %s RPF is not present", __func__,
up->sg_str);
return;
}
/*
* In the case of a HFR we will not ahve anyone to send this to.
*/
if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags))
return;
/*
* Don't send the join if the outgoing interface is a loopback
* But since this might change leave the join timer running
*/
if (up->rpf.source_nexthop
.interface && !if_is_loopback(up->rpf.source_nexthop.interface))
pim_upstream_send_join(up);
join_timer_start(up);
}
static void join_timer_stop(struct pim_upstream *up)
{
struct pim_neighbor *nbr = NULL;
EVENT_OFF(up->t_join_timer);
if (up->rpf.source_nexthop.interface)
nbr = pim_neighbor_find(up->rpf.source_nexthop.interface,
up->rpf.rpf_addr, true);
if (nbr)
pim_jp_agg_remove_group(nbr->upstream_jp_agg, up, nbr);
pim_jp_agg_upstream_verification(up, false);
}
void join_timer_start(struct pim_upstream *up)
{
struct pim_neighbor *nbr = NULL;
if (up->rpf.source_nexthop.interface) {
nbr = pim_neighbor_find(up->rpf.source_nexthop.interface,
up->rpf.rpf_addr, true);
if (PIM_DEBUG_PIM_EVENTS) {
zlog_debug(
"%s: starting %d sec timer for upstream (S,G)=%s",
__func__, router->t_periodic, up->sg_str);
}
}
if (nbr)
pim_jp_agg_add_group(nbr->upstream_jp_agg, up, 1, nbr);
else {
EVENT_OFF(up->t_join_timer);
event_add_timer(router->master, on_join_timer, up,
router->t_periodic, &up->t_join_timer);
}
pim_jp_agg_upstream_verification(up, true);
}
/*
* This is only called when we are switching the upstream
* J/P from one neighbor to another
*
* As such we need to remove from the old list and
* add to the new list.
*/
void pim_upstream_join_timer_restart(struct pim_upstream *up,
struct pim_rpf *old)
{
// EVENT_OFF(up->t_join_timer);
join_timer_start(up);
}
static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up,
int interval_msec)
{
if (PIM_DEBUG_PIM_EVENTS) {
zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s",
__func__, interval_msec, up->sg_str);
}
EVENT_OFF(up->t_join_timer);
event_add_timer_msec(router->master, on_join_timer, up, interval_msec,
&up->t_join_timer);
}
void pim_update_suppress_timers(uint32_t suppress_time)
{
struct pim_instance *pim;
struct vrf *vrf;
unsigned int old_rp_ka_time;
/* stash the old one so we know which values were manually configured */
old_rp_ka_time = (3 * router->register_suppress_time
+ router->register_probe_time);
router->register_suppress_time = suppress_time;
RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) {
pim = vrf->info;
if (!pim)
continue;
/* Only adjust if not manually configured */
if (pim->rp_keep_alive_time == old_rp_ka_time)
pim->rp_keep_alive_time = PIM_RP_KEEPALIVE_PERIOD;
}
}
void pim_upstream_join_suppress(struct pim_upstream *up, pim_addr rpf,
int holdtime)
{
long t_joinsuppress_msec;
long join_timer_remain_msec = 0;
struct pim_neighbor *nbr = NULL;
if (!up->rpf.source_nexthop.interface) {
if (PIM_DEBUG_PIM_TRACE)
zlog_debug("%s: up %s RPF is not present", __func__,
up->sg_str);
return;
}
t_joinsuppress_msec =
MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface),
1000 * holdtime);
if (up->t_join_timer)
join_timer_remain_msec =
pim_time_timer_remain_msec(up->t_join_timer);
else {
/* Remove it from jp agg from the nbr for suppression */
nbr = pim_neighbor_find(up->rpf.source_nexthop.interface,
up->rpf.rpf_addr, true);
if (nbr) {
join_timer_remain_msec =
pim_time_timer_remain_msec(nbr->jp_timer);
}
}
if (PIM_DEBUG_PIM_TRACE)
zlog_debug(
"%s %s: detected Join%s to RPF'(S,G)=%pPA: join_timer=%ld msec t_joinsuppress=%ld msec",
__FILE__, __func__, up->sg_str, &rpf,
join_timer_remain_msec, t_joinsuppress_msec);
if (join_timer_remain_msec < t_joinsuppress_msec) {
if (PIM_DEBUG_PIM_TRACE) {
zlog_debug(
"%s %s: suppressing Join(S,G)=%s for %ld msec",
__FILE__, __func__, up->sg_str,
t_joinsuppress_msec);
}
if (nbr)
pim_jp_agg_remove_group(nbr->upstream_jp_agg, up, nbr);
pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec);
}
}
void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label,
struct pim_upstream *up)
{
long join_timer_remain_msec;
int t_override_msec;
if (!up->rpf.source_nexthop.interface) {
if (PIM_DEBUG_PIM_TRACE)
zlog_debug("%s: up %s RPF is not present", __func__,
up->sg_str);
return;
}
t_override_msec =
pim_if_t_override_msec(up->rpf.source_nexthop.interface);
if (up->t_join_timer) {
join_timer_remain_msec =
pim_time_timer_remain_msec(up->t_join_timer);
} else {
/* upstream join tracked with neighbor jp timer */
struct pim_neighbor *nbr;
nbr = pim_neighbor_find(up->rpf.source_nexthop.interface,
up->rpf.rpf_addr, true);
if (nbr)
join_timer_remain_msec =
pim_time_timer_remain_msec(nbr->jp_timer);
else
/* Manipulate such that override takes place */
join_timer_remain_msec = t_override_msec + 1;
}
if (PIM_DEBUG_PIM_TRACE)
zlog_debug(
"%s: to RPF'%s=%pPA: join_timer=%ld msec t_override=%d msec",
debug_label, up->sg_str, &up->rpf.rpf_addr,
join_timer_remain_msec, t_override_msec);
if (join_timer_remain_msec > t_override_msec) {
if (PIM_DEBUG_PIM_TRACE) {
zlog_debug(
"%s: decreasing (S,G)=%s join timer to t_override=%d msec",
debug_label, up->sg_str, t_override_msec);
}
pim_upstream_join_timer_restart_msec(up, t_override_msec);
}
}
static void forward_on(struct pim_upstream *up)
{
struct listnode *chnode;
struct listnode *chnextnode;
struct pim_ifchannel *ch = NULL;
/* scan (S,G) state */
for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) {
if (pim_macro_chisin_oiflist(ch))
pim_forward_start(ch);
} /* scan iface channel list */
}
static void forward_off(struct pim_upstream *up)
{
struct listnode *chnode;
struct listnode *chnextnode;
struct pim_ifchannel *ch;
/* scan per-interface (S,G) state */
for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) {
pim_forward_stop(ch);
} /* scan iface channel list */
}
int pim_upstream_could_register(struct pim_upstream *up)
{
struct pim_interface *pim_ifp = NULL;
/* FORCE_PIMREG is a generic flag to let an app like VxLAN-AA register
* a source on an upstream entry even if the source is not directly
* connected on the IIF.
*/
if (PIM_UPSTREAM_FLAG_TEST_FORCE_PIMREG(up->flags))
return 1;
if (up->rpf.source_nexthop.interface)
pim_ifp = up->rpf.source_nexthop.interface->info;
else {
if (PIM_DEBUG_PIM_TRACE)
zlog_debug("%s: up %s RPF is not present", __func__,
up->sg_str);
}
if (pim_ifp && PIM_I_am_DR(pim_ifp)
&& pim_if_connected_to_source(up->rpf.source_nexthop.interface,
up->sg.src))
return 1;
return 0;
}
/* Source registration is suppressed for SSM groups. When the SSM range changes
* we re-revaluate register setup for existing upstream entries */
void pim_upstream_register_reevaluate(struct pim_instance *pim)
{
struct pim_upstream *up;
frr_each (rb_pim_upstream, &pim->upstream_head, up) {
/* If FHR is set CouldRegister is True. Also check if the flow
* is actually active; if it is not kat setup will trigger
* source
* registration whenever the flow becomes active. */
if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) ||
!pim_upstream_is_kat_running(up))
continue;
if (pim_is_grp_ssm(pim, up->sg.grp)) {
/* clear the register state for SSM groups */
if (up->reg_state != PIM_REG_NOINFO) {
if (PIM_DEBUG_PIM_EVENTS)
zlog_debug(
"Clear register for %s as G is now SSM",
up->sg_str);
/* remove regiface from the OIL if it is there*/
pim_channel_del_oif(up->channel_oil,
pim->regiface,
PIM_OIF_FLAG_PROTO_PIM,
__func__);
up->reg_state = PIM_REG_NOINFO;
}
} else {
/* register ASM sources with the RP */
if (up->reg_state == PIM_REG_NOINFO) {
if (PIM_DEBUG_PIM_EVENTS)
zlog_debug(
"Register %s as G is now ASM",
up->sg_str);
pim_channel_add_oif(up->channel_oil,
pim->regiface,
PIM_OIF_FLAG_PROTO_PIM,
__func__);
up->reg_state = PIM_REG_JOIN;
}
}
}
}
/* RFC7761, Section 4.2 “Data Packet Forwarding Rules” says we should
* forward a S -
* 1. along the SPT if SPTbit is set
* 2. and along the RPT if SPTbit is not set
* If forwarding is hw accelerated i.e. control and dataplane components
* are separate you may not be able to reliably set SPT bit on intermediate
* routers while still forwarding on the (S,G,rpt).
*
* This macro is a slight deviation on the RFC and uses "traffic-agnostic"
* criteria to decide between using the RPT vs. SPT for forwarding.
*/
void pim_upstream_update_use_rpt(struct pim_upstream *up,
bool update_mroute)
{
bool old_use_rpt;
bool new_use_rpt;
if (pim_addr_is_any(up->sg.src))
return;
old_use_rpt = !!PIM_UPSTREAM_FLAG_TEST_USE_RPT(up->flags);
/* We will use the SPT (IIF=RPF_interface(S) if -
* 1. We have decided to join the SPT
* 2. We are FHR
* 3. Source is directly connected
* 4. We are RP (parent's IIF is lo or vrf-device)
* In all other cases the source will stay along the RPT and
* IIF=RPF_interface(RP).
*/
if (up->join_state == PIM_UPSTREAM_JOINED ||
PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) ||
pim_if_connected_to_source(
up->rpf.source_nexthop.interface,
up->sg.src) ||
/* XXX - need to switch this to a more efficient
* lookup API
*/
I_am_RP(up->pim, up->sg.grp))
/* use SPT */
PIM_UPSTREAM_FLAG_UNSET_USE_RPT(up->flags);
else
/* use RPT */
PIM_UPSTREAM_FLAG_SET_USE_RPT(up->flags);
new_use_rpt = !!PIM_UPSTREAM_FLAG_TEST_USE_RPT(up->flags);
if (old_use_rpt != new_use_rpt) {
if (PIM_DEBUG_PIM_EVENTS)
zlog_debug("%s switched from %s to %s", up->sg_str,
old_use_rpt ? "RPT" : "SPT",
new_use_rpt ? "RPT" : "SPT");
if (update_mroute)
pim_upstream_mroute_add(up->channel_oil, __func__);
}
}
/* some events like RP change require re-evaluation of SGrpt across
* all groups
*/
void pim_upstream_reeval_use_rpt(struct pim_instance *pim)
{
struct pim_upstream *up;
frr_each (rb_pim_upstream, &pim->upstream_head, up) {
if (pim_addr_is_any(up->sg.src))
continue;
pim_upstream_update_use_rpt(up, true /*update_mroute*/);
}
}
void pim_upstream_switch(struct pim_instance *pim, struct pim_upstream *up,
enum pim_upstream_state new_state)
{
enum pim_upstream_state old_state = up->join_state;
if (pim_addr_is_any(up->upstream_addr)) {
if (PIM_DEBUG_PIM_EVENTS)
zlog_debug("%s: RPF not configured for %s", __func__,
up->sg_str);
return;
}
if (!up->rpf.source_nexthop.interface) {
if (PIM_DEBUG_PIM_EVENTS)
zlog_debug("%s: RP not reachable for %s", __func__,
up->sg_str);
return;
}
if (PIM_DEBUG_PIM_EVENTS) {
zlog_debug("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s",
__func__, up->sg_str,
pim_upstream_state2str(up->join_state),
pim_upstream_state2str(new_state));
}
up->join_state = new_state;
if (old_state != new_state)
up->state_transition = pim_time_monotonic_sec();
pim_upstream_update_assert_tracking_desired(up);
if (new_state == PIM_UPSTREAM_JOINED) {
pim_upstream_inherited_olist_decide(pim, up);
if (old_state != PIM_UPSTREAM_JOINED) {
int old_fhr = PIM_UPSTREAM_FLAG_TEST_FHR(up->flags);
pim_msdp_up_join_state_changed(pim, up);
if (pim_upstream_could_register(up)) {
PIM_UPSTREAM_FLAG_SET_FHR(up->flags);
if (!old_fhr
&& PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(
up->flags)) {
pim_upstream_keep_alive_timer_start(
up, pim->keep_alive_time);
pim_register_join(up);
}
} else {
pim_upstream_send_join(up);
join_timer_start(up);
}
}
if (old_state != new_state)
pim_upstream_update_use_rpt(up, true /*update_mroute*/);
} else {
bool old_use_rpt;
bool new_use_rpt;
bool send_xg_jp = false;
forward_off(up);
/*
* RFC 4601 Sec 4.5.7:
* JoinDesired(S,G) -> False, set SPTbit to false.
*/
if (!pim_addr_is_any(up->sg.src))
up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE;
if (old_state == PIM_UPSTREAM_JOINED)
pim_msdp_up_join_state_changed(pim, up);
if (old_state != new_state) {
old_use_rpt =
!!PIM_UPSTREAM_FLAG_TEST_USE_RPT(up->flags);
pim_upstream_update_use_rpt(up, true /*update_mroute*/);
new_use_rpt =
!!PIM_UPSTREAM_FLAG_TEST_USE_RPT(up->flags);
if (new_use_rpt &&
(new_use_rpt != old_use_rpt) &&
up->parent)
/* we have decided to switch from the SPT back
* to the RPT which means we need to cancel
* any previously sent SGrpt prunes immediately
*/
send_xg_jp = true;
}
/* IHR, Trigger SGRpt on *,G IIF to prune S,G from RPT towards
RP.
If I am RP for G then send S,G prune to its IIF. */
if (pim_upstream_is_sg_rpt(up) && up->parent &&
!I_am_RP(pim, up->sg.grp))
send_xg_jp = true;
pim_jp_agg_single_upstream_send(&up->rpf, up, 0 /* prune */);
if (send_xg_jp) {
if (PIM_DEBUG_PIM_TRACE_DETAIL)
zlog_debug(
"re-join RPT; *,G IIF %s S,G IIF %s ",
up->parent->rpf.source_nexthop.interface ?
up->parent->rpf.source_nexthop.interface->name
: "Unknown",
up->rpf.source_nexthop.interface ?
up->rpf.source_nexthop.interface->name :
"Unknown");
pim_jp_agg_single_upstream_send(&up->parent->rpf,
up->parent,
1 /* (W,G) Join */);
}
join_timer_stop(up);
}
}
int pim_upstream_compare(const struct pim_upstream *up1,
const struct pim_upstream *up2)
{
return pim_sgaddr_cmp(up1->sg, up2->sg);
}
void pim_upstream_fill_static_iif(struct pim_upstream *up,
struct interface *incoming)
{
up->rpf.source_nexthop.interface = incoming;
/* reset other parameters to matched a connected incoming interface */
up->rpf.source_nexthop.mrib_nexthop_addr = PIMADDR_ANY;
up->rpf.source_nexthop.mrib_metric_preference =
ZEBRA_CONNECT_DISTANCE_DEFAULT;
up->rpf.source_nexthop.mrib_route_metric = 0;
up->rpf.rpf_addr = PIMADDR_ANY;
}
static struct pim_upstream *pim_upstream_new(struct pim_instance *pim,
pim_sgaddr *sg,
struct interface *incoming,
int flags,
struct pim_ifchannel *ch)
{
enum pim_rpf_result rpf_result;
struct pim_interface *pim_ifp;
struct pim_upstream *up;
up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up));
up->pim = pim;
up->sg = *sg;
snprintfrr(up->sg_str, sizeof(up->sg_str), "%pSG", sg);
if (ch)
ch->upstream = up;
rb_pim_upstream_add(&pim->upstream_head, up);
/* Set up->upstream_addr as INADDR_ANY, if RP is not
* configured and retain the upstream data structure
*/
if (!pim_rp_set_upstream_addr(pim, &up->upstream_addr, sg->src,
sg->grp)) {
if (PIM_DEBUG_PIM_TRACE)
zlog_debug("%s: Received a (*,G) with no RP configured",
__func__);
}
up->parent = pim_upstream_find_parent(pim, up);
if (pim_addr_is_any(up->sg.src)) {
up->sources = list_new();
up->sources->cmp =
(int (*)(void *, void *))pim_upstream_compare;
} else
up->sources = NULL;
pim_upstream_find_new_children(pim, up);
up->flags = flags;
up->ref_count = 1;
up->t_join_timer = NULL;
up->t_ka_timer = NULL;
up->t_rs_timer = NULL;
up->t_msdp_reg_timer = NULL;
up->join_state = PIM_UPSTREAM_NOTJOINED;
up->reg_state = PIM_REG_NOINFO;
up->state_transition = pim_time_monotonic_sec();
up->channel_oil = pim_channel_oil_add(pim, &up->sg, __func__);
up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE;
up->rpf.source_nexthop.interface = NULL;
up->rpf.source_nexthop.mrib_nexthop_addr = PIMADDR_ANY;
up->rpf.source_nexthop.mrib_metric_preference =
router->infinite_assert_metric.metric_preference;
up->rpf.source_nexthop.mrib_route_metric =
router->infinite_assert_metric.route_metric;
up->rpf.rpf_addr = PIMADDR_ANY;
up->ifchannels = list_new();
up->ifchannels->cmp = (int (*)(void *, void *))pim_ifchannel_compare;
if (!pim_addr_is_any(up->sg.src)) {
wheel_add_item(pim->upstream_sg_wheel, up);
/* Inherit the DF role from the parent (*, G) entry for
* VxLAN BUM groups
*/
if (up->parent
&& PIM_UPSTREAM_FLAG_TEST_MLAG_VXLAN(up->parent->flags)
&& PIM_UPSTREAM_FLAG_TEST_MLAG_NON_DF(up->parent->flags)) {
PIM_UPSTREAM_FLAG_SET_MLAG_NON_DF(up->flags);
if (PIM_DEBUG_VXLAN)
zlog_debug(
"upstream %s inherited mlag non-df flag from parent",
up->sg_str);
}
}
if (PIM_UPSTREAM_FLAG_TEST_STATIC_IIF(up->flags)
|| PIM_UPSTREAM_FLAG_TEST_SRC_NOCACHE(up->flags)) {
pim_upstream_fill_static_iif(up, incoming);
pim_ifp = up->rpf.source_nexthop.interface->info;
assert(pim_ifp);
pim_upstream_update_use_rpt(up,
false /*update_mroute*/);
pim_upstream_mroute_iif_update(up->channel_oil, __func__);
if (PIM_UPSTREAM_FLAG_TEST_SRC_NOCACHE(up->flags)) {
/*
* Set the right RPF so that future changes will
* be right
*/
(void)pim_rpf_update(pim, up, NULL, __func__);
pim_upstream_keep_alive_timer_start(
up, pim->keep_alive_time);
}
} else if (!pim_addr_is_any(up->upstream_addr)) {
pim_upstream_update_use_rpt(up,
false /*update_mroute*/);
rpf_result = pim_rpf_update(pim, up, NULL, __func__);
if (rpf_result == PIM_RPF_FAILURE) {
up->channel_oil->oil_inherited_rescan = 1;
if (PIM_DEBUG_PIM_TRACE)
zlog_debug(
"%s: Attempting to create upstream(%s), Unable to RPF for source",
__func__, up->sg_str);
}
/* Consider a case where (S,G,rpt) prune is received and this
* upstream is getting created due to that, then as per RFC
* until prune pending time we need to behave same as NOINFO
* state, therefore do not install if OIF is NULL until then
* This is for PIM Conformance PIM-SM 16.3 fix
* When the prune pending timer pop, this mroute will get
* installed with none as OIF */
if (up->rpf.source_nexthop.interface &&
!(pim_upstream_empty_inherited_olist(up) && (ch != NULL) &&
PIM_IF_FLAG_TEST_S_G_RPT(ch->flags))) {
pim_upstream_mroute_iif_update(up->channel_oil,
__func__);
}
}
/* send the entry to the MLAG peer */
/* XXX - duplicate send is possible here if pim_rpf_update
* successfully resolved the nexthop
*/
if (pim_up_mlag_is_local(up)
|| PIM_UPSTREAM_FLAG_TEST_MLAG_INTERFACE(up->flags))
pim_mlag_up_local_add(pim, up);
if (PIM_DEBUG_PIM_TRACE) {
zlog_debug(
"%s: Created Upstream %s upstream_addr %pPAs ref count %d increment",
__func__, up->sg_str, &up->upstream_addr,
up->ref_count);
}
return up;
}
uint32_t pim_up_mlag_local_cost(struct pim_upstream *up)
{
if (!(pim_up_mlag_is_local(up))
&& !(up->flags & PIM_UPSTREAM_FLAG_MASK_MLAG_INTERFACE))
return router->infinite_assert_metric.route_metric;
if ((up->rpf.source_nexthop.interface ==
up->pim->vxlan.peerlink_rif) &&
(up->rpf.source_nexthop.mrib_route_metric <
(router->infinite_assert_metric.route_metric -
PIM_UPSTREAM_MLAG_PEERLINK_PLUS_METRIC)))
return up->rpf.source_nexthop.mrib_route_metric +
PIM_UPSTREAM_MLAG_PEERLINK_PLUS_METRIC;
return up->rpf.source_nexthop.mrib_route_metric;
}
uint32_t pim_up_mlag_peer_cost(struct pim_upstream *up)
{
if (!(up->flags & PIM_UPSTREAM_FLAG_MASK_MLAG_PEER))
return router->infinite_assert_metric.route_metric;
return up->mlag.peer_mrib_metric;
}
struct pim_upstream *pim_upstream_find(struct pim_instance *pim, pim_sgaddr *sg)
{
struct pim_upstream lookup;
struct pim_upstream *up = NULL;
lookup.sg = *sg;
up = rb_pim_upstream_find(&pim->upstream_head, &lookup);
return up;
}
struct pim_upstream *pim_upstream_find_or_add(pim_sgaddr *sg,
struct interface *incoming,
int flags, const char *name)
{
struct pim_interface *pim_ifp = incoming->info;