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pim_iface.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 "if.h"
#include "log.h"
#include "vty.h"
#include "memory.h"
#include "prefix.h"
#include "vrf.h"
#include "linklist.h"
#include "plist.h"
#include "hash.h"
#include "ferr.h"
#include "network.h"
#include "pimd.h"
#include "pim_instance.h"
#include "pim_zebra.h"
#include "pim_iface.h"
#include "pim_igmp.h"
#include "pim_mroute.h"
#include "pim_oil.h"
#include "pim_str.h"
#include "pim_pim.h"
#include "pim_neighbor.h"
#include "pim_ifchannel.h"
#include "pim_sock.h"
#include "pim_time.h"
#include "pim_ssmpingd.h"
#include "pim_rp.h"
#include "pim_nht.h"
#include "pim_jp_agg.h"
#include "pim_igmp_join.h"
#include "pim_vxlan.h"
#include "pim6_mld.h"
#if PIM_IPV == 4
static void pim_if_igmp_join_del_all(struct interface *ifp);
#endif
static int gm_join_sock(const char *ifname, ifindex_t ifindex,
pim_addr group_addr, pim_addr source_addr,
struct pim_interface *pim_ifp);
void pim_if_init(struct pim_instance *pim)
{
int i;
for (i = 0; i < MAXVIFS; i++)
pim->iface_vif_index[i] = 0;
}
void pim_if_terminate(struct pim_instance *pim)
{
struct interface *ifp;
FOR_ALL_INTERFACES (pim->vrf, ifp) {
struct pim_interface *pim_ifp = ifp->info;
if (!pim_ifp)
continue;
pim_if_delete(ifp);
}
return;
}
static void pim_sec_addr_free(struct pim_secondary_addr *sec_addr)
{
XFREE(MTYPE_PIM_SEC_ADDR, sec_addr);
}
__attribute__((unused))
static int pim_sec_addr_comp(const void *p1, const void *p2)
{
const struct pim_secondary_addr *sec1 = p1;
const struct pim_secondary_addr *sec2 = p2;
if (sec1->addr.family == AF_INET && sec2->addr.family == AF_INET6)
return -1;
if (sec1->addr.family == AF_INET6 && sec2->addr.family == AF_INET)
return 1;
if (sec1->addr.family == AF_INET) {
if (ntohl(sec1->addr.u.prefix4.s_addr)
< ntohl(sec2->addr.u.prefix4.s_addr))
return -1;
if (ntohl(sec1->addr.u.prefix4.s_addr)
> ntohl(sec2->addr.u.prefix4.s_addr))
return 1;
} else {
return memcmp(&sec1->addr.u.prefix6, &sec2->addr.u.prefix6,
sizeof(struct in6_addr));
}
return 0;
}
struct pim_interface *pim_if_new(struct interface *ifp, bool gm, bool pim,
bool ispimreg, bool is_vxlan_term)
{
struct pim_interface *pim_ifp;
assert(ifp);
assert(!ifp->info);
pim_ifp = XCALLOC(MTYPE_PIM_INTERFACE, sizeof(*pim_ifp));
pim_ifp->pim = ifp->vrf->info;
pim_ifp->mroute_vif_index = -1;
pim_ifp->igmp_version = IGMP_DEFAULT_VERSION;
pim_ifp->mld_version = MLD_DEFAULT_VERSION;
pim_ifp->gm_default_robustness_variable =
GM_DEFAULT_ROBUSTNESS_VARIABLE;
pim_ifp->gm_default_query_interval = GM_GENERAL_QUERY_INTERVAL;
pim_ifp->gm_query_max_response_time_dsec =
GM_QUERY_MAX_RESPONSE_TIME_DSEC;
pim_ifp->gm_specific_query_max_response_time_dsec =
GM_SPECIFIC_QUERY_MAX_RESPONSE_TIME_DSEC;
pim_ifp->gm_last_member_query_count = GM_DEFAULT_ROBUSTNESS_VARIABLE;
/* BSM config on interface: true by default */
pim_ifp->bsm_enable = true;
pim_ifp->ucast_bsm_accept = true;
pim_ifp->am_i_dr = false;
/*
RFC 3376: 8.3. Query Response Interval
The number of seconds represented by the [Query Response Interval]
must be less than the [Query Interval].
*/
assert(pim_ifp->gm_query_max_response_time_dsec <
pim_ifp->gm_default_query_interval);
pim_ifp->pim_enable = pim;
pim_ifp->pim_passive_enable = false;
pim_ifp->gm_enable = gm;
pim_ifp->gm_join_list = NULL;
pim_ifp->pim_neighbor_list = NULL;
pim_ifp->upstream_switch_list = NULL;
pim_ifp->pim_generation_id = 0;
/* list of struct gm_sock */
pim_igmp_if_init(pim_ifp, ifp);
/* list of struct pim_neighbor */
pim_ifp->pim_neighbor_list = list_new();
pim_ifp->pim_neighbor_list->del = (void (*)(void *))pim_neighbor_free;
pim_ifp->upstream_switch_list = list_new();
pim_ifp->upstream_switch_list->del =
(void (*)(void *))pim_jp_agg_group_list_free;
pim_ifp->upstream_switch_list->cmp = pim_jp_agg_group_list_cmp;
pim_ifp->sec_addr_list = list_new();
pim_ifp->sec_addr_list->del = (void (*)(void *))pim_sec_addr_free;
pim_ifp->sec_addr_list->cmp =
(int (*)(void *, void *))pim_sec_addr_comp;
pim_ifp->activeactive = false;
RB_INIT(pim_ifchannel_rb, &pim_ifp->ifchannel_rb);
ifp->info = pim_ifp;
pim_sock_reset(ifp);
pim_if_add_vif(ifp, ispimreg, is_vxlan_term);
pim_ifp->pim->mcast_if_count++;
return pim_ifp;
}
void pim_if_delete(struct interface *ifp)
{
struct pim_interface *pim_ifp;
assert(ifp);
pim_ifp = ifp->info;
assert(pim_ifp);
pim_ifp->pim->mcast_if_count--;
#if PIM_IPV == 4
if (pim_ifp->gm_join_list) {
pim_if_igmp_join_del_all(ifp);
}
#endif
pim_ifchannel_delete_all(ifp);
#if PIM_IPV == 4
igmp_sock_delete_all(ifp);
#endif
if (pim_ifp->pim_sock_fd >= 0)
pim_sock_delete(ifp, "Interface removed from configuration");
pim_if_del_vif(ifp);
pim_igmp_if_fini(pim_ifp);
list_delete(&pim_ifp->pim_neighbor_list);
list_delete(&pim_ifp->upstream_switch_list);
list_delete(&pim_ifp->sec_addr_list);
if (pim_ifp->bfd_config.profile)
XFREE(MTYPE_TMP, pim_ifp->bfd_config.profile);
XFREE(MTYPE_PIM_INTERFACE, pim_ifp->boundary_oil_plist);
XFREE(MTYPE_PIM_INTERFACE, pim_ifp);
ifp->info = NULL;
}
void pim_if_update_could_assert(struct interface *ifp)
{
struct pim_interface *pim_ifp;
struct pim_ifchannel *ch;
pim_ifp = ifp->info;
assert(pim_ifp);
RB_FOREACH (ch, pim_ifchannel_rb, &pim_ifp->ifchannel_rb) {
pim_ifchannel_update_could_assert(ch);
}
}
static void pim_if_update_my_assert_metric(struct interface *ifp)
{
struct pim_interface *pim_ifp;
struct pim_ifchannel *ch;
pim_ifp = ifp->info;
assert(pim_ifp);
RB_FOREACH (ch, pim_ifchannel_rb, &pim_ifp->ifchannel_rb) {
pim_ifchannel_update_my_assert_metric(ch);
}
}
static void pim_addr_change(struct interface *ifp)
{
struct pim_interface *pim_ifp;
pim_ifp = ifp->info;
assert(pim_ifp);
pim_if_dr_election(ifp); /* router's own DR Priority (addr) changes --
Done TODO T30 */
pim_if_update_join_desired(pim_ifp); /* depends on DR */
pim_if_update_could_assert(ifp); /* depends on DR */
pim_if_update_my_assert_metric(ifp); /* depends on could_assert */
pim_if_update_assert_tracking_desired(
ifp); /* depends on DR, join_desired */
/*
RFC 4601: 4.3.1. Sending Hello Messages
1) Before an interface goes down or changes primary IP address, a
Hello message with a zero HoldTime should be sent immediately
(with the old IP address if the IP address changed).
-- Done at the caller of the function as new ip already updated here
2) After an interface has changed its IP address, it MUST send a
Hello message with its new IP address.
-- DONE below
3) If an interface changes one of its secondary IP addresses, a
Hello message with an updated Address_List option and a non-zero
HoldTime should be sent immediately.
-- FIXME See TODO T31
*/
PIM_IF_FLAG_UNSET_HELLO_SENT(pim_ifp->flags);
if (pim_ifp->pim_sock_fd < 0)
return;
pim_hello_restart_now(ifp); /* send hello and restart timer */
}
static int detect_primary_address_change(struct interface *ifp,
int force_prim_as_any,
const char *caller)
{
struct pim_interface *pim_ifp = ifp->info;
pim_addr new_prim_addr;
int changed;
if (force_prim_as_any)
new_prim_addr = PIMADDR_ANY;
else
new_prim_addr = pim_find_primary_addr(ifp);
changed = pim_addr_cmp(new_prim_addr, pim_ifp->primary_address);
if (PIM_DEBUG_ZEBRA)
zlog_debug("%s: old=%pPA new=%pPA on interface %s: %s",
__func__, &pim_ifp->primary_address, &new_prim_addr,
ifp->name, changed ? "changed" : "unchanged");
if (changed) {
/* Before updating pim_ifp send Hello time with 0 hold time */
if (pim_ifp->pim_enable) {
pim_hello_send(ifp, 0 /* zero-sec holdtime */);
}
pim_ifp->primary_address = new_prim_addr;
}
return changed;
}
static struct pim_secondary_addr *
pim_sec_addr_find(struct pim_interface *pim_ifp, struct prefix *addr)
{
struct pim_secondary_addr *sec_addr;
struct listnode *node;
for (ALL_LIST_ELEMENTS_RO(pim_ifp->sec_addr_list, node, sec_addr)) {
if (prefix_cmp(&sec_addr->addr, addr) == 0) {
return sec_addr;
}
}
return NULL;
}
static void pim_sec_addr_del(struct pim_interface *pim_ifp,
struct pim_secondary_addr *sec_addr)
{
listnode_delete(pim_ifp->sec_addr_list, sec_addr);
pim_sec_addr_free(sec_addr);
}
static int pim_sec_addr_add(struct pim_interface *pim_ifp, struct prefix *addr)
{
int changed = 0;
struct pim_secondary_addr *sec_addr;
sec_addr = pim_sec_addr_find(pim_ifp, addr);
if (sec_addr) {
sec_addr->flags &= ~PIM_SEC_ADDRF_STALE;
return changed;
}
sec_addr = XCALLOC(MTYPE_PIM_SEC_ADDR, sizeof(*sec_addr));
changed = 1;
sec_addr->addr = *addr;
listnode_add_sort(pim_ifp->sec_addr_list, sec_addr);
return changed;
}
static int pim_sec_addr_del_all(struct pim_interface *pim_ifp)
{
int changed = 0;
if (!list_isempty(pim_ifp->sec_addr_list)) {
changed = 1;
/* remove all nodes and free up the list itself */
list_delete_all_node(pim_ifp->sec_addr_list);
}
return changed;
}
static int pim_sec_addr_update(struct interface *ifp)
{
struct pim_interface *pim_ifp = ifp->info;
struct connected *ifc;
struct listnode *node;
struct listnode *nextnode;
struct pim_secondary_addr *sec_addr;
int changed = 0;
for (ALL_LIST_ELEMENTS_RO(pim_ifp->sec_addr_list, node, sec_addr)) {
sec_addr->flags |= PIM_SEC_ADDRF_STALE;
}
for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) {
pim_addr addr = pim_addr_from_prefix(ifc->address);
if (pim_addr_is_any(addr))
continue;
if (!pim_addr_cmp(addr, pim_ifp->primary_address)) {
/* don't add the primary address into the secondary
* address list */
continue;
}
if (pim_sec_addr_add(pim_ifp, ifc->address)) {
changed = 1;
}
}
/* Drop stale entries */
for (ALL_LIST_ELEMENTS(pim_ifp->sec_addr_list, node, nextnode,
sec_addr)) {
if (sec_addr->flags & PIM_SEC_ADDRF_STALE) {
pim_sec_addr_del(pim_ifp, sec_addr);
changed = 1;
}
}
return changed;
}
static int detect_secondary_address_change(struct interface *ifp,
int force_prim_as_any,
const char *caller)
{
struct pim_interface *pim_ifp = ifp->info;
int changed = 0;
if (force_prim_as_any) {
/* if primary address is being forced to zero just flush the
* secondary address list */
changed = pim_sec_addr_del_all(pim_ifp);
} else {
/* re-evaluate the secondary address list */
changed = pim_sec_addr_update(ifp);
}
return changed;
}
static void detect_address_change(struct interface *ifp, int force_prim_as_any,
const char *caller)
{
int changed = 0;
struct pim_interface *pim_ifp;
pim_ifp = ifp->info;
if (!pim_ifp)
return;
if (detect_primary_address_change(ifp, force_prim_as_any, caller)) {
changed = 1;
}
if (detect_secondary_address_change(ifp, force_prim_as_any, caller)) {
changed = 1;
}
if (changed) {
if (!pim_ifp->pim_enable) {
return;
}
pim_addr_change(ifp);
}
/* XXX: if we have unnumbered interfaces we need to run detect address
* address change on all of them when the lo address changes */
}
int pim_update_source_set(struct interface *ifp, pim_addr source)
{
struct pim_interface *pim_ifp = ifp->info;
if (!pim_ifp) {
return PIM_IFACE_NOT_FOUND;
}
if (!pim_addr_cmp(pim_ifp->update_source, source)) {
return PIM_UPDATE_SOURCE_DUP;
}
pim_ifp->update_source = source;
detect_address_change(ifp, 0 /* force_prim_as_any */, __func__);
return PIM_SUCCESS;
}
void pim_if_addr_add(struct connected *ifc)
{
struct pim_interface *pim_ifp;
struct interface *ifp;
bool vxlan_term;
assert(ifc);
ifp = ifc->ifp;
assert(ifp);
pim_ifp = ifp->info;
if (!pim_ifp)
return;
if (!if_is_operative(ifp))
return;
if (PIM_DEBUG_ZEBRA)
zlog_debug("%s: %s ifindex=%d connected IP address %pFX %s",
__func__, ifp->name, ifp->ifindex, ifc->address,
CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY)
? "secondary"
: "primary");
#if PIM_IPV != 4
if (IN6_IS_ADDR_LINKLOCAL(&ifc->address->u.prefix6) ||
IN6_IS_ADDR_LOOPBACK(&ifc->address->u.prefix6)) {
if (IN6_IS_ADDR_UNSPECIFIED(&pim_ifp->ll_lowest))
pim_ifp->ll_lowest = ifc->address->u.prefix6;
else if (IPV6_ADDR_CMP(&ifc->address->u.prefix6,
&pim_ifp->ll_lowest) < 0)
pim_ifp->ll_lowest = ifc->address->u.prefix6;
if (IPV6_ADDR_CMP(&ifc->address->u.prefix6,
&pim_ifp->ll_highest) > 0)
pim_ifp->ll_highest = ifc->address->u.prefix6;
if (PIM_DEBUG_ZEBRA)
zlog_debug(
"%s: new link-local %pI6, lowest now %pI6, highest %pI6",
ifc->ifp->name, &ifc->address->u.prefix6,
&pim_ifp->ll_lowest, &pim_ifp->ll_highest);
}
#endif
detect_address_change(ifp, 0, __func__);
// if (ifc->address->family != AF_INET)
// return;
#if PIM_IPV == 4
struct in_addr ifaddr = ifc->address->u.prefix4;
if (pim_ifp->gm_enable) {
struct gm_sock *igmp;
/* lookup IGMP socket */
igmp = pim_igmp_sock_lookup_ifaddr(pim_ifp->gm_socket_list,
ifaddr);
if (!igmp) {
/* if addr new, add IGMP socket */
if (ifc->address->family == AF_INET)
pim_igmp_sock_add(pim_ifp->gm_socket_list,
ifaddr, ifp, false);
} else if (igmp->mtrace_only) {
igmp_sock_delete(igmp);
pim_igmp_sock_add(pim_ifp->gm_socket_list, ifaddr, ifp,
false);
}
/* Replay Static IGMP groups */
if (pim_ifp->gm_join_list) {
struct listnode *node;
struct listnode *nextnode;
struct gm_join *ij;
int join_fd;
for (ALL_LIST_ELEMENTS(pim_ifp->gm_join_list, node,
nextnode, ij)) {
/* Close socket and reopen with Source and Group
*/
close(ij->sock_fd);
join_fd = gm_join_sock(
ifp->name, ifp->ifindex, ij->group_addr,
ij->source_addr, pim_ifp);
if (join_fd < 0) {
char group_str[INET_ADDRSTRLEN];
char source_str[INET_ADDRSTRLEN];
pim_inet4_dump("<grp?>", ij->group_addr,
group_str,
sizeof(group_str));
pim_inet4_dump(
"<src?>", ij->source_addr,
source_str, sizeof(source_str));
zlog_warn(
"%s: gm_join_sock() failure for IGMP group %s source %s on interface %s",
__func__, group_str, source_str,
ifp->name);
/* warning only */
} else
ij->sock_fd = join_fd;
}
}
} /* igmp */
else {
struct gm_sock *igmp;
/* lookup IGMP socket */
igmp = pim_igmp_sock_lookup_ifaddr(pim_ifp->gm_socket_list,
ifaddr);
if (ifc->address->family == AF_INET) {
if (igmp)
igmp_sock_delete(igmp);
/* if addr new, add IGMP socket */
pim_igmp_sock_add(pim_ifp->gm_socket_list, ifaddr, ifp,
true);
}
} /* igmp mtrace only */
#endif
if (pim_ifp->pim_enable) {
if (!pim_addr_is_any(pim_ifp->primary_address)) {
/* Interface has a valid socket ? */
if (pim_ifp->pim_sock_fd < 0) {
if (pim_sock_add(ifp)) {
zlog_warn(
"Failure creating PIM socket for interface %s",
ifp->name);
}
}
struct pim_nexthop_cache *pnc = NULL;
struct pim_rpf rpf;
struct zclient *zclient = NULL;
zclient = pim_zebra_zclient_get();
/* RP config might come prior to (local RP's interface)
IF UP event.
In this case, pnc would not have pim enabled
nexthops.
Once Interface is UP and pim info is available,
reregister
with RNH address to receive update and add the
interface as nexthop. */
memset(&rpf, 0, sizeof(struct pim_rpf));
rpf.rpf_addr = pim_addr_from_prefix(ifc->address);
pnc = pim_nexthop_cache_find(pim_ifp->pim, &rpf);
if (pnc)
pim_sendmsg_zebra_rnh(pim_ifp->pim, zclient,
pnc,
ZEBRA_NEXTHOP_REGISTER);
}
} /* pim */
/*
PIM or IGMP is enabled on interface, and there is at least one
address assigned, then try to create a vif_index.
*/
if (pim_ifp->mroute_vif_index < 0) {
vxlan_term = pim_vxlan_is_term_dev_cfg(pim_ifp->pim, ifp);
pim_if_add_vif(ifp, false, vxlan_term);
}
gm_ifp_update(ifp);
pim_ifchannel_scan_forward_start(ifp);
}
static void pim_if_addr_del_igmp(struct connected *ifc)
{
#if PIM_IPV == 4
struct pim_interface *pim_ifp = ifc->ifp->info;
struct gm_sock *igmp;
struct in_addr ifaddr;
if (ifc->address->family != AF_INET) {
/* non-IPv4 address */
return;
}
if (!pim_ifp) {
/* IGMP not enabled on interface */
return;
}
ifaddr = ifc->address->u.prefix4;
/* lookup IGMP socket */
igmp = pim_igmp_sock_lookup_ifaddr(pim_ifp->gm_socket_list, ifaddr);
if (igmp) {
/* if addr found, del IGMP socket */
igmp_sock_delete(igmp);
}
#endif
}
static void pim_if_addr_del_pim(struct connected *ifc)
{
struct pim_interface *pim_ifp = ifc->ifp->info;
if (ifc->address->family != PIM_AF) {
/* non-IPv4 address */
return;
}
if (!pim_ifp) {
/* PIM not enabled on interface */
return;
}
if (!pim_addr_is_any(pim_ifp->primary_address)) {
/* Interface keeps a valid primary address */
return;
}
if (pim_ifp->pim_sock_fd < 0) {
/* Interface does not hold a valid socket any longer */
return;
}
/*
pim_sock_delete() closes the socket, stops read and timer threads,
and kills all neighbors.
*/
pim_sock_delete(ifc->ifp,
"last address has been removed from interface");
}
void pim_if_addr_del(struct connected *ifc, int force_prim_as_any)
{
struct interface *ifp;
assert(ifc);
ifp = ifc->ifp;
assert(ifp);
if (PIM_DEBUG_ZEBRA)
zlog_debug("%s: %s ifindex=%d disconnected IP address %pFX %s",
__func__, ifp->name, ifp->ifindex, ifc->address,
CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY)
? "secondary"
: "primary");
#if PIM_IPV == 6
struct pim_interface *pim_ifp = ifc->ifp->info;
if (pim_ifp &&
(!IPV6_ADDR_CMP(&ifc->address->u.prefix6, &pim_ifp->ll_lowest) ||
!IPV6_ADDR_CMP(&ifc->address->u.prefix6, &pim_ifp->ll_highest))) {
struct listnode *cnode;
struct connected *cc;
memset(&pim_ifp->ll_lowest, 0xff, sizeof(pim_ifp->ll_lowest));
memset(&pim_ifp->ll_highest, 0, sizeof(pim_ifp->ll_highest));
for (ALL_LIST_ELEMENTS_RO(ifc->ifp->connected, cnode, cc)) {
if (!IN6_IS_ADDR_LINKLOCAL(&cc->address->u.prefix6) &&
!IN6_IS_ADDR_LOOPBACK(&cc->address->u.prefix6))
continue;
if (IPV6_ADDR_CMP(&cc->address->u.prefix6,
&pim_ifp->ll_lowest) < 0)
pim_ifp->ll_lowest = cc->address->u.prefix6;
if (IPV6_ADDR_CMP(&cc->address->u.prefix6,
&pim_ifp->ll_highest) > 0)
pim_ifp->ll_highest = cc->address->u.prefix6;
}
if (pim_ifp->ll_lowest.s6_addr[0] == 0xff)
memset(&pim_ifp->ll_lowest, 0,
sizeof(pim_ifp->ll_lowest));
if (PIM_DEBUG_ZEBRA)
zlog_debug(
"%s: removed link-local %pI6, lowest now %pI6, highest %pI6",
ifc->ifp->name, &ifc->address->u.prefix6,
&pim_ifp->ll_lowest, &pim_ifp->ll_highest);
gm_ifp_update(ifp);
}
#endif
detect_address_change(ifp, force_prim_as_any, __func__);
pim_if_addr_del_igmp(ifc);
pim_if_addr_del_pim(ifc);
}
void pim_if_addr_add_all(struct interface *ifp)
{
struct connected *ifc;
struct listnode *node;
struct listnode *nextnode;
int v4_addrs = 0;
int v6_addrs = 0;
struct pim_interface *pim_ifp = ifp->info;
bool vxlan_term;
/* PIM/IGMP enabled ? */
if (!pim_ifp)
return;
for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) {
struct prefix *p = ifc->address;
if (p->family != AF_INET)
v6_addrs++;
else
v4_addrs++;
pim_if_addr_add(ifc);
}
if (!v4_addrs && v6_addrs && !if_is_loopback(ifp) &&
pim_ifp->pim_enable && !pim_addr_is_any(pim_ifp->primary_address) &&
pim_ifp->pim_sock_fd < 0 && pim_sock_add(ifp)) {
/* Interface has a valid primary address ? */
/* Interface has a valid socket ? */
zlog_warn("Failure creating PIM socket for interface %s",
ifp->name);
}
/*
* PIM or IGMP/MLD is enabled on interface, and there is at least one
* address assigned, then try to create a vif_index.
*/
if (pim_ifp->mroute_vif_index < 0) {
vxlan_term = pim_vxlan_is_term_dev_cfg(pim_ifp->pim, ifp);
pim_if_add_vif(ifp, false, vxlan_term);
}
gm_ifp_update(ifp);
pim_ifchannel_scan_forward_start(ifp);
pim_rp_setup(pim_ifp->pim);
pim_rp_check_on_if_add(pim_ifp);
}
void pim_if_addr_del_all(struct interface *ifp)
{
struct connected *ifc;
struct listnode *node;
struct listnode *nextnode;
struct pim_instance *pim;
pim = ifp->vrf->info;
if (!pim)
return;
/* PIM/IGMP enabled ? */
if (!ifp->info)
return;
for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) {
struct prefix *p = ifc->address;
if (p->family != PIM_AF)
continue;
pim_if_addr_del(ifc, 1 /* force_prim_as_any=true */);
}
pim_rp_setup(pim);
pim_i_am_rp_re_evaluate(pim);
}
void pim_if_addr_del_all_igmp(struct interface *ifp)
{
struct connected *ifc;
struct listnode *node;
struct listnode *nextnode;
/* PIM/IGMP enabled ? */
if (!ifp->info)
return;
for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) {
struct prefix *p = ifc->address;
if (p->family != AF_INET)
continue;
pim_if_addr_del_igmp(ifc);
}
}
pim_addr pim_find_primary_addr(struct interface *ifp)
{
struct connected *ifc;
struct listnode *node;
struct pim_interface *pim_ifp = ifp->info;
if (pim_ifp && !pim_addr_is_any(pim_ifp->update_source))
return pim_ifp->update_source;
#if PIM_IPV == 6
if (pim_ifp && !pim_addr_is_any(pim_ifp->ll_highest))
return pim_ifp->ll_highest;
pim_addr best_addr = PIMADDR_ANY;
for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) {
pim_addr addr;
if (ifc->address->family != AF_INET6)
continue;
addr = pim_addr_from_prefix(ifc->address);
if (!IN6_IS_ADDR_LINKLOCAL(&addr))
continue;
if (pim_addr_cmp(addr, best_addr) > 0)
best_addr = addr;
}
return best_addr;
#else
int v4_addrs = 0;
int v6_addrs = 0;
for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) {
switch (ifc->address->family) {
case AF_INET:
v4_addrs++;
break;
case AF_INET6:
v6_addrs++;
break;
default:
continue;
}
if (CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY))
continue;
if (ifc->address->family != PIM_AF)
continue;
return pim_addr_from_prefix(ifc->address);
}
/*
* If we have no v4_addrs and v6 is configured
* We probably are using unnumbered
* So let's grab the loopbacks v4 address
* and use that as the primary address
*/
if (!v4_addrs && v6_addrs) {
struct interface *lo_ifp;
// DBS - Come back and check here
if (ifp->vrf->vrf_id == VRF_DEFAULT)
lo_ifp = if_lookup_by_name("lo", ifp->vrf->vrf_id);
else
lo_ifp = if_lookup_by_name(ifp->vrf->name,
ifp->vrf->vrf_id);
if (lo_ifp && (lo_ifp != ifp))
return pim_find_primary_addr(lo_ifp);
}
return PIMADDR_ANY;
#endif
}
static int pim_iface_next_vif_index(struct interface *ifp)
{
struct pim_interface *pim_ifp = ifp->info;
struct pim_instance *pim = pim_ifp->pim;
int i;
/*
* The pimreg vif is always going to be in index 0
* of the table.
*/
if (ifp->ifindex == PIM_OIF_PIM_REGISTER_VIF)
return 0;
for (i = 1; i < MAXVIFS; i++) {
if (pim->iface_vif_index[i] == 0)
return i;
}
return MAXVIFS;
}
/*
pim_if_add_vif() uses ifindex as vif_index
see also pim_if_find_vifindex_by_ifindex()
*/
int pim_if_add_vif(struct interface *ifp, bool ispimreg, bool is_vxlan_term)
{
struct pim_interface *pim_ifp = ifp->info;
pim_addr ifaddr;
unsigned char flags = 0;
assert(pim_ifp);
if (pim_ifp->mroute_vif_index > 0) {
zlog_warn("%s: vif_index=%d > 0 on interface %s ifindex=%d",
__func__, pim_ifp->mroute_vif_index, ifp->name,
ifp->ifindex);
return -1;
}
if (ifp->ifindex < 0) {
zlog_warn("%s: ifindex=%d < 0 on interface %s", __func__,
ifp->ifindex, ifp->name);
return -2;
} else if ((ifp->ifindex == PIM_OIF_PIM_REGISTER_VIF) &&
((strncmp(ifp->name, "pimreg", 6)) &&
(strncmp(ifp->name, "pim6reg", 7)))) {
zlog_warn("%s: ifindex=%d on interface %s", __func__,
ifp->ifindex, ifp->name);
return -2;
}
ifaddr = pim_ifp->primary_address;
#if PIM_IPV != 6
/* IPv6 API is always by interface index */
if (!ispimreg && !is_vxlan_term && pim_addr_is_any(ifaddr)) {
zlog_warn(
"%s: could not get address for interface %s ifindex=%d",
__func__, ifp->name, ifp->ifindex);
return -4;