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freebsd/usr.sbin/pim6sd/pim6_proto.c
Kris Kennaway 5bca844f39 Sync with latest KAME code. 
Obtained from:	KAME
2000-07-06 01:48:08 +00:00

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/*
* Copyright (C) 1999 LSIIT Laboratory.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Copyright (C) 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Copyright (c) 1998 by the University of Southern California.
* All rights reserved.
*
* Permission to use, copy, modify, and distribute this software and
* its documentation in source and binary forms for lawful
* purposes and without fee is hereby granted, provided
* that the above copyright notice appear in all copies and that both
* the copyright notice and this permission notice appear in supporting
* documentation, and that any documentation, advertising materials,
* and other materials related to such distribution and use acknowledge
* that the software was developed by the University of Southern
* California and/or Information Sciences Institute.
* The name of the University of Southern California may not
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THE UNIVERSITY OF SOUTHERN CALIFORNIA DOES NOT MAKE ANY REPRESENTATIONS
* ABOUT THE SUITABILITY OF THIS SOFTWARE FOR ANY PURPOSE. THIS SOFTWARE IS
* PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND
* NON-INFRINGEMENT.
*
* IN NO EVENT SHALL USC, OR ANY OTHER CONTRIBUTOR BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, WHETHER IN CONTRACT,
* TORT, OR OTHER FORM OF ACTION, ARISING OUT OF OR IN CONNECTION WITH,
* THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Other copyrights might apply to parts of this software and are so
* noted when applicable.
*/
/*
* Questions concerning this software should be directed to
* Mickael Hoerdt (hoerdt@clarinet.u-strasbg.fr) LSIIT Strasbourg.
*
*/
/*
* This program has been derived from pim6dd.
* The pim6dd program is covered by the license in the accompanying file
* named "LICENSE.pim6dd".
*/
/*
* This program has been derived from pimd.
* The pimd program is covered by the license in the accompanying file
* named "LICENSE.pimd".
*
* $FreeBSD$
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet6/pim6.h>
#include <netinet/ip6.h>
#include <syslog.h>
#include <stdlib.h>
#include "mrt.h"
#include "defs.h"
#include "vif.h"
#include "debug.h"
#include "pim6.h"
#include "pim6_proto.h"
#include "pimd.h"
#include "rp.h"
#include "mld6.h"
#include "timer.h"
#include "route.h"
#include "inet6.h"
#include "kern.h"
#include "routesock.h"
/*
* Local functions definitions.
*/
static int parse_pim6_hello __P((char *pktPtr , int datalen , struct sockaddr_in6 *src,
u_int16 *holdtime));
static int send_pim6_register_stop __P((struct sockaddr_in6 *reg_src , struct sockaddr_in6 *reg_dst ,
struct sockaddr_in6 *inner_source,
struct sockaddr_in6 *inner_grp));
static build_jp_message_t *get_jp6_working_buff __P((void));
static void return_jp6_working_buff __P((pim_nbr_entry_t * pim_nbr));
static void pack_jp6_message __P((pim_nbr_entry_t * pim_nbr));
static void send_jp6_message __P((pim_nbr_entry_t * pim_nbr));
static int compare_metrics __P((u_int32 local_preference,
u_int32 local_metric,
struct sockaddr_in6 *local_address,
u_int32 remote_preference,
u_int32 remote_metric,
struct sockaddr_in6 *remote_address));
build_jp_message_t *build_jp_message_pool;
int build_jp_message_pool_counter;
struct sockaddr_in6 sockaddr6_any = {sizeof(struct sockaddr_in6) , AF_INET6 ,0,0, IN6ADDR_ANY_INIT};
struct sockaddr_in6 sockaddr6_d;
struct pim6dstat pim6dstat;
/************************************************************************
* PIM_HELLO
************************************************************************/
int
receive_pim6_hello(src, pim_message, datalen)
struct sockaddr_in6 *src;
register char *pim_message;
int datalen;
{
mifi_t mifi;
struct uvif *v;
register pim_nbr_entry_t *nbr,
*prev_nbr,
*new_nbr;
u_int16 holdtime;
int bsr_length;
u_int8 *data_ptr;
srcentry_t *srcentry_ptr;
mrtentry_t *mrtentry_ptr;
if ((mifi = find_vif_direct(src)) == NO_VIF)
{
/*
* Either a local vif or somehow received PIM_HELLO from non-directly
* connected router. Ignore it.
*/
if (local_address(src) == NO_VIF)
log(LOG_INFO, 0, "Ignoring PIM_HELLO from non-neighbor router %s",
inet6_fmt(&src->sin6_addr));
return (FALSE);
}
v = &uvifs[mifi];
v->uv_in_pim6_hello++; /* increment statistacs */
if (v->uv_flags & (VIFF_DOWN | VIFF_DISABLED | MIFF_REGISTER))
return (FALSE); /* Shoudn't come on this interface */
data_ptr = (u_int8 *) (pim_message + sizeof(struct pim));
/* Get the Holdtime (in seconds) from the message. Return if error. */
if (parse_pim6_hello(pim_message, datalen, src, &holdtime) == FALSE)
return (FALSE);
IF_DEBUG(DEBUG_PIM_HELLO | DEBUG_PIM_TIMER)
log(LOG_DEBUG, 0, "PIM HELLO holdtime from %s is %u",
inet6_fmt(&src->sin6_addr), holdtime);
for (prev_nbr = (pim_nbr_entry_t *) NULL, nbr = v->uv_pim_neighbors;
nbr != (pim_nbr_entry_t *) NULL;
prev_nbr = nbr, nbr = nbr->next)
{
/*
* The PIM neighbors are sorted in decreasing order of the network
* addresses (note that to be able to compare them correctly we must
* translate the addresses in host order.
*/
if (inet6_lessthan(src, &nbr->address))
continue;
if (inet6_equal(src, &nbr->address))
{
/* We already have an entry for this host */
if (0 == holdtime)
{
/*
* Looks like we have a nice neighbor who is going down and
* wants to inform us by sending "holdtime=0". Thanks buddy
* and see you again!
*/
log(LOG_INFO, 0, "PIM HELLO received: neighbor %s going down",
inet6_fmt(&src->sin6_addr));
delete_pim6_nbr(nbr);
return (TRUE);
}
SET_TIMER(nbr->timer, holdtime);
return (TRUE);
}
else
/*
* No entry for this neighbor. Exit the loop and create an entry
* for it.
*/
break;
}
/*
* This is a new neighbor. Create a new entry for it. It must be added
* right after `prev_nbr`
*/
new_nbr = (pim_nbr_entry_t *) malloc(sizeof(pim_nbr_entry_t));
new_nbr->address = *src;
new_nbr->vifi = mifi;
SET_TIMER(new_nbr->timer, holdtime);
new_nbr->build_jp_message = (build_jp_message_t *) NULL;
new_nbr->next = nbr;
new_nbr->prev = prev_nbr;
if (prev_nbr != (pim_nbr_entry_t *) NULL)
prev_nbr->next = new_nbr;
else
v->uv_pim_neighbors = new_nbr;
if (new_nbr->next != (pim_nbr_entry_t *) NULL)
new_nbr->next->prev = new_nbr;
v->uv_flags &= ~VIFF_NONBRS;
v->uv_flags |= VIFF_PIM_NBR;
/* Since a new neighbour has come up, let it know your existence */
/*
* XXX: TODO: not in the spec, but probably should send the message after
* a short random period?
*/
send_pim6_hello(v, pim_hello_holdtime);
if (v->uv_flags & VIFF_DR)
{
/*
* If I am the current DR on that interface, so send an RP-Set
* message to the new neighbor.
*/
if ((bsr_length = create_pim6_bootstrap_message(pim6_send_buf)))
send_pim6(pim6_send_buf, &v->uv_linklocal->pa_addr , src , PIM_BOOTSTRAP,
bsr_length);
/* The router with highest network address is the elected DR */
if (inet6_lessthan(&v->uv_linklocal->pa_addr,&v->uv_pim_neighbors->address))
{
/*
* I was the DR, but not anymore. Remove all register_vif from
* oif list for all directly connected sources (for vifi).
*/
/* TODO: XXX: first entry is not used! */
for (srcentry_ptr = srclist->next;
srcentry_ptr != (srcentry_t *) NULL;
srcentry_ptr = srcentry_ptr->next)
{
/* If not directly connected source for vifi */
if ((srcentry_ptr->incoming != mifi)
|| (srcentry_ptr->upstream != (pim_nbr_entry_t *) NULL))
continue;
for (mrtentry_ptr = srcentry_ptr->mrtlink;
mrtentry_ptr != (mrtentry_t *) NULL;
mrtentry_ptr = mrtentry_ptr->srcnext)
{
if (!(mrtentry_ptr->flags & MRTF_SG))
continue; /* This is not (S,G) entry */
/* Remove the register oif */
IF_CLR(reg_vif_num, &mrtentry_ptr->joined_oifs);
change_interfaces(mrtentry_ptr,
mrtentry_ptr->incoming,
&mrtentry_ptr->joined_oifs,
&mrtentry_ptr->pruned_oifs,
&mrtentry_ptr->leaves,
&mrtentry_ptr->asserted_oifs, 0);
}
}
v->uv_flags &= ~VIFF_DR;
}
}
/*
* TODO: XXX: does a new neighbor change any routing entries info? Need
* to trigger joins?
*/
IF_DEBUG(DEBUG_PIM_HELLO)
log(LOG_DEBUG,0,"I'have got a new neighbor %s on vif %s",inet6_fmt(&src->sin6_addr),v->uv_name);
return (TRUE);
}
void
delete_pim6_nbr(nbr_delete)
pim_nbr_entry_t *nbr_delete;
{
srcentry_t *srcentry_ptr;
srcentry_t *srcentry_ptr_next;
mrtentry_t *mrtentry_ptr;
mrtentry_t *mrtentry_srcs;
grpentry_t *grpentry_ptr;
pim_nbr_entry_t *new_nbr;
cand_rp_t *cand_rp_ptr;
rp_grp_entry_t *rp_grp_entry_ptr;
rpentry_t *rpentry_ptr;
struct uvif *v;
v = &uvifs[nbr_delete->vifi];
/* Delete the entry from the pim_nbrs chain */
if (nbr_delete->prev != (pim_nbr_entry_t *) NULL)
nbr_delete->prev->next = nbr_delete->next;
else
v->uv_pim_neighbors = nbr_delete->next;
if (nbr_delete->next != (pim_nbr_entry_t *) NULL)
nbr_delete->next->prev = nbr_delete->prev;
return_jp6_working_buff(nbr_delete);
if (v->uv_pim_neighbors == (pim_nbr_entry_t *) NULL)
{
/* This was our last neighbor. */
v->uv_flags &= ~VIFF_PIM_NBR;
v->uv_flags |= (VIFF_NONBRS | VIFF_DR);
}
else
{
if (inet6_greaterthan(&v->uv_linklocal->pa_addr,
&v->uv_pim_neighbors->address))
/*
* The first address is the new potential remote DR address, but
* the local address is the winner.
*/
v->uv_flags |= VIFF_DR;
}
/* Update the source entries */
for (srcentry_ptr = srclist; srcentry_ptr != (srcentry_t *) NULL;
srcentry_ptr = srcentry_ptr_next)
{
srcentry_ptr_next = srcentry_ptr->next;
if (srcentry_ptr->upstream != nbr_delete)
continue;
/* Reset the next hop (PIM) router */
if (set_incoming(srcentry_ptr, PIM_IIF_SOURCE) == FALSE)
{
/*
* Coudn't reset it. Sorry, the hext hop router toward that
* source is probably not a PIM router, or cannot find route at
* all, hence I cannot handle this source and have to delete it.
*/
delete_srcentry(srcentry_ptr);
}
else
if (srcentry_ptr->upstream != (pim_nbr_entry_t *) NULL)
{
/* Ignore the local or directly connected sources */
/*
* Browse all MRT entries for this source and reset the
* upstream router. Note that the upstream router is not
* always toward the source: it could be toward the RP for
* example.
*/
new_nbr = srcentry_ptr->upstream;
for (mrtentry_ptr = srcentry_ptr->mrtlink;
mrtentry_ptr != (mrtentry_t *) NULL;
mrtentry_ptr = mrtentry_ptr->srcnext)
{
if (!(mrtentry_ptr->flags & MRTF_RP))
{
mrtentry_ptr->upstream = srcentry_ptr->upstream;
mrtentry_ptr->metric = srcentry_ptr->metric;
mrtentry_ptr->preference = srcentry_ptr->preference;
change_interfaces(mrtentry_ptr, srcentry_ptr->incoming,
&mrtentry_ptr->joined_oifs,
&mrtentry_ptr->pruned_oifs,
&mrtentry_ptr->leaves,
&mrtentry_ptr->asserted_oifs, 0);
}
}
}
}
/* Update the RP entries */
for (cand_rp_ptr = cand_rp_list; cand_rp_ptr != (cand_rp_t *) NULL;
cand_rp_ptr = cand_rp_ptr->next)
{
if (cand_rp_ptr->rpentry->upstream != nbr_delete)
continue;
rpentry_ptr = cand_rp_ptr->rpentry;
/* Reset the RP entry iif */
/* TODO: check if error setting the iif! */
if (local_address(&rpentry_ptr->address) == NO_VIF)
{
set_incoming(rpentry_ptr, PIM_IIF_RP);
}
else
{
rpentry_ptr->incoming = reg_vif_num;
rpentry_ptr->upstream = (pim_nbr_entry_t *) NULL;
}
mrtentry_ptr = rpentry_ptr->mrtlink;
if (mrtentry_ptr != (mrtentry_t *) NULL)
{
mrtentry_ptr->upstream = rpentry_ptr->upstream;
mrtentry_ptr->metric = rpentry_ptr->metric;
mrtentry_ptr->preference = rpentry_ptr->preference;
change_interfaces(mrtentry_ptr,
rpentry_ptr->incoming,
&mrtentry_ptr->joined_oifs,
&mrtentry_ptr->pruned_oifs,
&mrtentry_ptr->leaves,
&mrtentry_ptr->asserted_oifs, 0);
}
/* Update the group entries for this RP */
for (rp_grp_entry_ptr = cand_rp_ptr->rp_grp_next;
rp_grp_entry_ptr != (rp_grp_entry_t *) NULL;
rp_grp_entry_ptr = rp_grp_entry_ptr->rp_grp_next)
{
for (grpentry_ptr = rp_grp_entry_ptr->grplink;
grpentry_ptr != (grpentry_t *) NULL;
grpentry_ptr = grpentry_ptr->rpnext)
{
mrtentry_ptr = grpentry_ptr->grp_route;
if (mrtentry_ptr != (mrtentry_t *) NULL)
{
mrtentry_ptr->upstream = rpentry_ptr->upstream;
mrtentry_ptr->metric = rpentry_ptr->metric;
mrtentry_ptr->preference = rpentry_ptr->preference;
change_interfaces(mrtentry_ptr,
rpentry_ptr->incoming,
&mrtentry_ptr->joined_oifs,
&mrtentry_ptr->pruned_oifs,
&mrtentry_ptr->leaves,
&mrtentry_ptr->asserted_oifs, 0);
}
/* Update only the (S,G)RPbit entries for this group */
for (mrtentry_srcs = grpentry_ptr->mrtlink;
mrtentry_srcs != (mrtentry_t *) NULL;
mrtentry_srcs = mrtentry_srcs->grpnext)
{
if (mrtentry_srcs->flags & MRTF_RP)
{
mrtentry_ptr->upstream = rpentry_ptr->upstream;
mrtentry_ptr->metric = rpentry_ptr->metric;
mrtentry_ptr->preference = rpentry_ptr->preference;
change_interfaces(mrtentry_srcs,
rpentry_ptr->incoming,
&mrtentry_srcs->joined_oifs,
&mrtentry_srcs->pruned_oifs,
&mrtentry_srcs->leaves,
&mrtentry_srcs->asserted_oifs, 0);
}
}
}
}
}
free((char *) nbr_delete);
}
/* TODO: simplify it! */
static int
parse_pim6_hello(pim_message, datalen, src, holdtime)
char *pim_message;
int datalen;
struct sockaddr_in6 *src;
u_int16 *holdtime;
{
u_int8 *pim_hello_message;
u_int8 *data_ptr;
u_int16 option_type;
u_int16 option_length;
int holdtime_received_ok = FALSE;
int option_total_length;
pim_hello_message = (u_int8 *) (pim_message + sizeof(struct pim));
datalen -= sizeof(struct pim);
for (; datalen >= sizeof(pim_hello_t);)
{
/* Ignore any data if shorter than (pim_hello header) */
data_ptr = pim_hello_message;
GET_HOSTSHORT(option_type, data_ptr);
GET_HOSTSHORT(option_length, data_ptr);
switch (option_type)
{
case PIM_MESSAGE_HELLO_HOLDTIME:
if (PIM_MESSAGE_HELLO_HOLDTIME_LENGTH != option_length)
{
IF_DEBUG(DEBUG_PIM_HELLO)
log(LOG_DEBUG, 0,
"PIM HELLO Holdtime from %s: invalid OptionLength = %u",
inet6_fmt(&src->sin6_addr), option_length);
return (FALSE);
}
GET_HOSTSHORT(*holdtime, data_ptr);
holdtime_received_ok = TRUE;
break;
default:
/* Ignore any unknown options */
break;
}
/* Move to the next option */
/*
* XXX: TODO: If we are padding to the end of the 32 bit boundary,
* use the first method to move to the next option, otherwise simply
* (sizeof(pim_hello_t) + option_length).
*/
#ifdef BOUNDARY_32_BIT
option_total_length = (sizeof(pim_hello_t) + (option_length & ~0x3) +
((option_length & 0x3) ? 4 : 0));
#else
option_total_length = (sizeof(pim_hello_t) + option_length);
#endif /* BOUNDARY_32_BIT */
datalen -= option_total_length;
pim_hello_message += option_total_length;
}
return (holdtime_received_ok);
}
int
send_pim6_hello(v, holdtime)
struct uvif *v;
u_int16 holdtime;
{
char *buf;
u_int8 *data_ptr;
int datalen;
buf = pim6_send_buf + sizeof(struct pim);
data_ptr = (u_int8 *) buf;
PUT_HOSTSHORT(PIM_MESSAGE_HELLO_HOLDTIME, data_ptr);
PUT_HOSTSHORT(PIM_MESSAGE_HELLO_HOLDTIME_LENGTH, data_ptr);
PUT_HOSTSHORT(holdtime, data_ptr);
datalen = data_ptr - (u_int8 *) buf;
send_pim6(pim6_send_buf, &v->uv_linklocal->pa_addr,
&allpim6routers_group, PIM_HELLO, datalen);
SET_TIMER(v->uv_pim_hello_timer, pim_hello_period);
v->uv_out_pim6_hello++;
return (TRUE);
}
/************************************************************************
* PIM_REGISTER
************************************************************************/
/*
* TODO: XXX: IF THE BORDER BIT IS SET, THEN FORWARD THE WHOLE PACKET FROM
* USER SPACE AND AT THE SAME TIME IGNORE ANY CACHE_MISS SIGNALS FROM THE
* KERNEL.
*/
int
receive_pim6_register(reg_src, reg_dst, pim_message, datalen)
struct sockaddr_in6 *reg_src,
*reg_dst;
char *pim_message;
int datalen;
{
struct sockaddr_in6 inner_src,
inner_grp;
pim_register_t *register_p;
struct ip6_hdr *ip;
u_int32 borderBit,
nullRegisterBit;
mrtentry_t *mrtentry_ptr;
mrtentry_t *mrtentry_ptr2;
if_set oifs;
pim6dstat.in_pim6_register++;
register_p = (pim_register_t *) (pim_message + sizeof(struct pim));
borderBit = ntohl(register_p->reg_flags) & PIM_MESSAGE_REGISTER_BORDER_BIT;
nullRegisterBit =
ntohl(register_p->reg_flags) & PIM_MESSAGE_REGISTER_NULL_REGISTER_BIT;
/* initialize the pointer to the encapsulated packet */
ip = (struct ip6_hdr *) (register_p + 1);
/*
* We are keeping all addresses in network order,
* so no need for byte order translation.
*/
inner_src.sin6_addr = ip->ip6_src;
inner_grp.sin6_addr = ip->ip6_dst;
/* scope validation of the inner source and destination addresses */
if (IN6_IS_ADDR_LINKLOCAL(&ip->ip6_src)) {
log(LOG_WARNING, 0,
"receive_pim6_register: inner source(%s) has invalid scope",
inet6_fmt(&ip->ip6_src));
}
#ifdef notyet
if (IN6_IS_ADDR_SITELOCAL)
inner_src.sin6_scope_id = addr2scopeid(&ip->ip6_src, &ip->ip6_dst,
reg_src, reg_dst);
else
#endif
inner_src.sin6_scope_id = 0;
if (IN6_IS_ADDR_MC_NODELOCAL(&ip->ip6_dst) ||
IN6_IS_ADDR_MC_LINKLOCAL(&ip->ip6_dst)) {
log(LOG_WARNING, 0,
"receive_pim6_register: inner group(%s) has invalid scope",
inet6_fmt(&ip->ip6_dst));
return(FALSE); /* XXX: can we discard it? */
}
#ifdef notyet
if (IN6_IS_ADDR_MC_SITELOCAL(&ip->ip6_dst))
inner_grp.sin6_scope_id = addr2scopeid(&ip->ip6_src, &ip->ip6_dst,
reg_src, reg_dst);
else
inner_grp.sin6_scope_id = 0;
#endif
inner_grp.sin6_scope_id = 0;
mrtentry_ptr = find_route(&inner_src, &inner_grp,
MRTF_SG | MRTF_WC | MRTF_PMBR, DONT_CREATE);
if (mrtentry_ptr == (mrtentry_t *) NULL)
{
/* No routing entry. Send REGISTER_STOP and return. */
IF_DEBUG(DEBUG_PIM_REGISTER)
log(LOG_DEBUG, 0,
"No routing entry for source %s and/or group %s",
inet6_fmt(&inner_src.sin6_addr), inet6_fmt(&inner_grp.sin6_addr));
/* TODO: XXX: shouldn't be inner_src=IN6ADDR_ANY? Not in the spec. */
send_pim6_register_stop(reg_dst, reg_src, &inner_grp, &inner_src);
return (TRUE);
}
/* XXX: not in the spec: check if I am the RP for that group */
if (!inet6_equal(&my_cand_rp_address, reg_dst)
|| (check_mrtentry_rp(mrtentry_ptr, &my_cand_rp_address) == FALSE))
{
send_pim6_register_stop(reg_dst, reg_src, &inner_grp, &inner_src);
return (TRUE);
}
if (mrtentry_ptr->flags & MRTF_SG)
{
/* (S,G) found */
/* TODO: check the timer again */
SET_TIMER(mrtentry_ptr->timer, pim_data_timeout); /* restart timer */
if (!(mrtentry_ptr->flags & MRTF_SPT))
{
/* The SPT bit is not set */
if (!nullRegisterBit)
{
calc_oifs(mrtentry_ptr, &oifs);
if (IF_ISEMPTY(&oifs)
&& (mrtentry_ptr->incoming == reg_vif_num))
{
send_pim6_register_stop(reg_dst, reg_src, &inner_grp,
&inner_src);
return (TRUE);
}
/*
* TODO: XXX: BUG!!! The data will be forwarded by the kernel
* MFC!!! Need to set a special flag for this routing entry
* so after a cache miss occur, the multicast packet will be
* forwarded from user space and won't install entry in the
* kernel MFC. The problem is that the kernel MFC doesn't
* know the PMBR address and simply sets the multicast
* forwarding cache to accept/forward all data coming from
* the register_vif.
*/
if (borderBit)
{
if (!inet6_equal(&mrtentry_ptr->pmbr_addr,reg_src))
{
send_pim6_register_stop(reg_dst, reg_src,
&inner_grp, &inner_src);
return (TRUE);
}
}
return (TRUE);
}
/* TODO: XXX: if NULL_REGISTER and has (S,G) with SPT=0, then..? */
return (TRUE);
}
else
{
/* The SPT bit is set */
send_pim6_register_stop(reg_dst, reg_src, &inner_grp, &inner_src);
return (TRUE);
}
}
if (mrtentry_ptr->flags & (MRTF_WC | MRTF_PMBR))
{
if (borderBit)
{
/*
* Create (S,G) state. The oifs will be the copied from the
* existing (*,G) or (*,*,RP) entry.
*/
mrtentry_ptr2 = find_route(&inner_src, &inner_grp, MRTF_SG,
CREATE);
if (mrtentry_ptr2 != (mrtentry_t *) NULL)
{
mrtentry_ptr2->pmbr_addr = *reg_src;
/* Clear the SPT flag */
mrtentry_ptr2->flags &= ~(MRTF_SPT | MRTF_NEW);
SET_TIMER(mrtentry_ptr2->timer, pim_data_timeout);
/* TODO: explicitly call the Join/Prune send function? */
FIRE_TIMER(mrtentry_ptr2->jp_timer); /* Send the Join
* immediately */
/*
* TODO: explicitly call this function?
* send_pim6_join_prune(mrtentry_ptr2->upstream->vifi,
* mrtentry_ptr2->upstream, pim_join_prune_holdtime);
*/
}
}
}
if (mrtentry_ptr->flags & MRTF_WC)
{
/* (*,G) entry */
calc_oifs(mrtentry_ptr, &oifs);
if (IF_ISEMPTY(&oifs))
{
send_pim6_register_stop(reg_dst, reg_src, &inner_grp, &sockaddr6_any);
return (FALSE);
}
/* XXX: TODO: check with the spec again */
else
{
if (!nullRegisterBit)
{
/* Install cache entry in the kernel */
/*
* TODO: XXX: probably redundant here, because the
* decapsulated mcast packet in the kernel will result in
* CACHE_MISS
*/
struct sockaddr_in6 *mfc_source = &inner_src;
#ifdef KERNEL_MFC_WC_G
if (!(mrtentry_ptr->flags & MRTF_MFC_CLONE_SG))
mfc_source = NULL;
#endif /* KERNEL_MFC_WC_G */
add_kernel_cache(mrtentry_ptr, mfc_source, &inner_grp, 0);
k_chg_mfc(mld6_socket, mfc_source, &inner_grp,
mrtentry_ptr->incoming, &mrtentry_ptr->oifs,
&mrtentry_ptr->group->rpaddr);
return (TRUE);
}
}
return (TRUE);
}
if (mrtentry_ptr->flags & MRTF_PMBR)
{
/* (*,*,RP) entry */
if (!nullRegisterBit)
{
struct sockaddr_in6 *mfc_source = &inner_src;
/*
* XXX: have to create either (S,G) or (*,G). The choice below is
* (*,G)
*/
mrtentry_ptr2 = find_route(NULL, &inner_grp, MRTF_WC,
CREATE);
if (mrtentry_ptr2 == (mrtentry_t *) NULL)
return (FALSE);
if (mrtentry_ptr2->flags & MRTF_NEW)
{
/* TODO: something else? Have the feeling sth is missing */
mrtentry_ptr2->flags &= ~MRTF_NEW;
/* TODO: XXX: copy the timer from the (*,*,RP) entry? */
COPY_TIMER(mrtentry_ptr->timer, mrtentry_ptr2->timer);
}
/* Install cache entry in the kernel */
#ifdef KERNEL_MFC_WC_G
if (!(mrtentry_ptr->flags & MRTF_MFC_CLONE_SG))
mfc_source = NULL;
#endif /* KERNEL_MFC_WC_G */
add_kernel_cache(mrtentry_ptr, mfc_source, &inner_grp, 0);
k_chg_mfc(mld6_socket, mfc_source, &inner_grp,
mrtentry_ptr->incoming, &mrtentry_ptr->oifs,
&mrtentry_ptr2->group->rpaddr);
return (TRUE);
}
}
/* Shoudn't happen: invalid routing entry? */
/* XXX: TODO: shoudn't be inner_src=IN6ADDR_ANY? Not in the spec. */
send_pim6_register_stop(reg_dst, reg_src, &inner_grp, &inner_src);
return (TRUE);
}
int
send_pim6_register(pkt)
char *pkt;
{
register struct ip6_hdr *ip6;
static struct sockaddr_in6 source= {sizeof(source) , AF_INET6 };
static struct sockaddr_in6 group= {sizeof(group) , AF_INET6 };
mifi_t mifi;
rpentry_t *rpentry_ptr;
mrtentry_t *mrtentry_ptr;
mrtentry_t *mrtentry_ptr2;
struct sockaddr_in6 *reg_src,
*reg_dst;
int pktlen = 0;
char *buf;
ip6=(struct ip6_hdr *)pkt;
group.sin6_addr = ip6->ip6_dst;
source.sin6_addr = ip6->ip6_src;
if ((mifi = find_vif_direct_local(&source)) == NO_VIF)
return (FALSE);
if (!(uvifs[mifi].uv_flags & VIFF_DR))
return (FALSE); /* I am not the DR for that subnet */
rpentry_ptr = rp_match(&group);
if (rpentry_ptr == (rpentry_t *) NULL)
return (FALSE); /* No RP for this group */
if (local_address(&rpentry_ptr->address) != NO_VIF)
/* TODO: XXX: not sure it is working! */
return (FALSE); /* I am the RP for this group */
mrtentry_ptr = find_route(&source, &group, MRTF_SG, CREATE);
if (mrtentry_ptr == (mrtentry_t *) NULL)
return (FALSE); /* Cannot create (S,G) state */
if (mrtentry_ptr->flags & MRTF_NEW)
{
/* A new entry */
mrtentry_ptr->flags &= ~MRTF_NEW;
RESET_TIMER(mrtentry_ptr->rs_timer); /* Reset the
* Register-Suppression timer */
if ((mrtentry_ptr2 = mrtentry_ptr->group->grp_route) ==
(mrtentry_t *) NULL)
mrtentry_ptr2 =
mrtentry_ptr->group->active_rp_grp->rp->rpentry->mrtlink;
if (mrtentry_ptr2 != (mrtentry_t *) NULL)
{
FIRE_TIMER(mrtentry_ptr2->jp_timer); /* Timeout the
* Join/Prune timer */
/*
* TODO: explicitly call this function?
* send_pim6_join_prune(mrtentry_ptr2->upstream->vifi,
* mrtentry_ptr2->upstream, pim_join_prune_holdtime);
*/
}
}
/* Restart the (S,G) Entry-timer */
SET_TIMER(mrtentry_ptr->timer, pim_data_timeout);
IF_TIMER_NOT_SET(mrtentry_ptr->rs_timer)
{
/*
* The Register-Suppression Timer is not running. Encapsulate the
* data and send to the RP.
*/
buf = pim6_send_buf + sizeof(struct pim);
bzero(buf, sizeof(pim_register_t)); /* No flags set */
buf += sizeof(pim_register_t);
/* Copy the data packet at the back of the register packet */
/* TODO: check pktlen. ntohs? */
pktlen = ntohs(ip6->ip6_plen);
pktlen +=sizeof(struct ip6_hdr); /* XXX */
bcopy((char *) ip6, buf, pktlen);
pktlen += sizeof(pim_register_t);
reg_src = max_global_address();
reg_dst = &mrtentry_ptr->group->rpaddr;
send_pim6(pim6_send_buf, reg_src , reg_dst , PIM_REGISTER,
pktlen);
pim6dstat.out_pim6_register++;
return (TRUE);
}
return (TRUE);
}
int
send_pim6_null_register(mrtentry_ptr)
mrtentry_t *mrtentry_ptr;
{
struct ip6_hdr *ip;
pim_register_t *pim_register;
int pktlen = 0;
mifi_t mifi;
struct sockaddr_in6 *reg_source,
*dest;
/* No directly connected source; no local address */
if ((mifi = find_vif_direct_local(&mrtentry_ptr->source->address)) == NO_VIF)
return (FALSE);
pim_register = (pim_register_t *) (pim6_send_buf + sizeof(struct pim));
bzero((char *) pim_register, sizeof(pim_register_t));
pim_register->reg_flags = htonl(pim_register->reg_flags
| PIM_MESSAGE_REGISTER_NULL_REGISTER_BIT);
/* include the dummy ip header */
ip = (struct ip6_hdr *) (pim_register +1);
ip->ip6_plen= 0;
ip->ip6_flow=0;
ip->ip6_vfc = 0x60;
ip->ip6_hlim = MINHLIM;
ip->ip6_nxt = IPPROTO_NONE;
ip->ip6_src = mrtentry_ptr->source->address.sin6_addr;
ip->ip6_dst = mrtentry_ptr->group->group.sin6_addr;
pktlen = sizeof(pim_register_t) + sizeof(struct ip6_hdr);
dest = &mrtentry_ptr->group->rpaddr;
reg_source = max_global_address();
send_pim6(pim6_send_buf, reg_source , dest, PIM_REGISTER,
pktlen);
pim6dstat.out_pim6_register++; /* should be counted separately? */
return (TRUE);
}
/************************************************************************
* PIM_REGISTER_STOP
************************************************************************/
int
receive_pim6_register_stop(reg_src, reg_dst, pim_message, datalen)
struct sockaddr_in6 *reg_src,
*reg_dst;
char *pim_message;
register int datalen;
{
pim_register_stop_t *pim_regstop_p;
pim6_encod_grp_addr_t encod_grp;
pim6_encod_uni_addr_t encod_unisrc;
struct sockaddr_in6 source,
group;
u_int8 *data_ptr;
mrtentry_t *mrtentry_ptr;
if_set pruned_oifs;
mifi_t mifi;
struct uvif *v;
pim6dstat.in_pim6_register_stop++;
pim_regstop_p = (pim_register_stop_t *) (pim_message +
sizeof(struct pim));
data_ptr = (u_int8 *) & pim_regstop_p->encod_grp;
GET_EGADDR6(&encod_grp, data_ptr);
GET_EUADDR6(&encod_unisrc, data_ptr);
group.sin6_addr = encod_grp.mcast_addr;
/* scope validation of the inner source and destination addresses */
#ifdef notyet
if (IN6_IS_ADDR_MC_SITELOCAL(&ip->ip6_dst))
group.sin6_scope_id = addr2scopeid(&ip->ip6_src, &ip->ip6_dst,
reg_src, reg_dst);
else
#endif
group.sin6_scope_id = 0;
source.sin6_addr = encod_unisrc.unicast_addr;
/* the source address must be global...but is it always true? */
#ifdef notyet
if (IN6_IS_ADDR_SITELOCAL)
source.sin6_scope_id = addr2scopeid(&ip->ip6_src, &ip->ip6_dst,
reg_src, reg_dst);
else
#endif
source.sin6_scope_id = 0;
if((mifi= find_vif_direct_local(&source))==NO_VIF)
{
IF_DEBUG(DEBUG_PIM_REGISTER)
{
log(LOG_WARNING,0,
"Received PIM_REGISTER_STOP from RP %s for a non "
"direct-connect source %s",
inet6_fmt(&reg_src->sin6_addr),
inet6_fmt(&encod_unisrc.unicast_addr));
}
return FALSE;
}
v=&uvifs[mifi];
group.sin6_scope_id = inet6_uvif2scopeid(&group, v);
source.sin6_scope_id = inet6_uvif2scopeid(&source,
v);
IF_DEBUG(DEBUG_PIM_REGISTER)
{
log(LOG_DEBUG, 0,
"Received PIM_REGISTER_STOP from RP %s to %s "
"source : %s group : %s",
inet6_fmt(&reg_src->sin6_addr),
inet6_fmt(&reg_dst->sin6_addr),
inet6_fmt(&encod_unisrc.unicast_addr),
inet6_fmt(&encod_grp.mcast_addr));
}
/* TODO: apply the group mask and do register_stop for all grp addresses */
/* TODO: check for SourceAddress == 0 */
mrtentry_ptr = find_route(&source, &group,
MRTF_SG, DONT_CREATE);
if (mrtentry_ptr == (mrtentry_t *) NULL)
{
return (FALSE);
}
/*
* XXX: not in the spec: check if the PIM_REGISTER_STOP originator is
* really the RP
*/
if (check_mrtentry_rp(mrtentry_ptr, reg_src) == FALSE)
{
return (FALSE);
}
/* restart the Register-Suppression timer */
SET_TIMER(mrtentry_ptr->rs_timer, (0.5 * pim_register_suppression_timeout)
+ (RANDOM() % (pim_register_suppression_timeout + 1)));
/* Prune the register_vif from the outgoing list */
IF_COPY(&mrtentry_ptr->pruned_oifs, &pruned_oifs);
IF_SET(reg_vif_num, &pruned_oifs);
change_interfaces(mrtentry_ptr, mrtentry_ptr->incoming,
&mrtentry_ptr->joined_oifs, &pruned_oifs,
&mrtentry_ptr->leaves,
&mrtentry_ptr->asserted_oifs, 0);
return (TRUE);
}
/* TODO: optional rate limiting is not implemented yet */
/* Unicasts a REGISTER_STOP message to the DR */
static int
send_pim6_register_stop(reg_src, reg_dst, inner_grp, inner_src)
struct sockaddr_in6 *reg_src,
*reg_dst,
*inner_grp,
*inner_src;
{
char *buf;
u_int8 *data_ptr;
buf = pim6_send_buf + sizeof(struct pim);
data_ptr = (u_int8 *) buf;
PUT_EGADDR6(inner_grp->sin6_addr, SINGLE_GRP_MSK6LEN, 0, data_ptr);
PUT_EUADDR6(inner_src->sin6_addr, data_ptr);
send_pim6(pim6_send_buf, reg_src , reg_dst , PIM_REGISTER_STOP,
data_ptr-(u_int8 *) buf);
pim6dstat.out_pim6_register_stop++;
return (TRUE);
}
/************************************************************************
* PIM_JOIN_PRUNE
************************************************************************/
int
join_or_prune(mrtentry_ptr, upstream_router)
mrtentry_t *mrtentry_ptr;
pim_nbr_entry_t *upstream_router;
{
if_set entry_oifs;
mrtentry_t *mrtentry_grp;
if ((mrtentry_ptr == (mrtentry_t *) NULL))
{
IF_DEBUG(DEBUG_PIM_JOIN_PRUNE)
log(LOG_DEBUG,0,"Join_or_prune : mrtentry_ptr is null");
return (PIM_ACTION_NOTHING);
}
if( upstream_router == (pim_nbr_entry_t *) NULL)
{
IF_DEBUG(DEBUG_PIM_JOIN_PRUNE)
log(LOG_DEBUG,0,"Join_or_prune : upstream_router is null");
return (PIM_ACTION_NOTHING);
}
calc_oifs(mrtentry_ptr, &entry_oifs);
if (mrtentry_ptr->flags & (MRTF_PMBR | MRTF_WC))
{
/* (*,*,RP) or (*,G) entry */
/* The (*,*,RP) or (*,G) J/P messages are sent only toward the RP */
if (upstream_router != mrtentry_ptr->upstream)
return (PIM_ACTION_NOTHING);
/* TODO: XXX: Can we have (*,*,RP) prune? */
if (IF_ISEMPTY(&entry_oifs))
{
/* NULL oifs */
if (!(uvifs[mrtentry_ptr->incoming].uv_flags & VIFF_DR))
{
/* I am not the DR for that subnet. */
return (PIM_ACTION_PRUNE);
}
if (IF_ISSET(mrtentry_ptr->incoming, &mrtentry_ptr->leaves))
/* I am the DR and have local leaves */
return (PIM_ACTION_JOIN);
/* Probably the last local member hast timeout */
return (PIM_ACTION_PRUNE);
}
return (PIM_ACTION_JOIN);
}
if (mrtentry_ptr->flags & MRTF_SG)
{
/* (S,G) entry */
/* TODO: check again */
if (mrtentry_ptr->upstream == upstream_router)
{
if (!(mrtentry_ptr->flags & MRTF_RP))
{
/* Upstream router toward S */
if (IF_ISEMPTY(&entry_oifs))
{
if (mrtentry_ptr->group->active_rp_grp != (rp_grp_entry_t *)NULL &&
inet6_equal(&mrtentry_ptr->group->rpaddr,
&my_cand_rp_address))
{
/*
* (S,G) at the RP. Don't send Join/Prune (see the
* end of Section 3.3.2)
*/
return (PIM_ACTION_NOTHING);
}
return (PIM_ACTION_PRUNE);
}
else
return (PIM_ACTION_JOIN);
}
else
{
/* Upstream router toward RP */
if (IF_ISEMPTY(&entry_oifs))
return (PIM_ACTION_PRUNE);
}
}
/*
* Looks like the case when the upstream router toward S is different
* from the upstream router toward RP
*/
if (mrtentry_ptr->group->active_rp_grp == (rp_grp_entry_t *) NULL)
return (PIM_ACTION_NOTHING);
mrtentry_grp = mrtentry_ptr->group->grp_route;
if (mrtentry_grp == (mrtentry_t *) NULL)
mrtentry_grp =
mrtentry_ptr->group->active_rp_grp->rp->rpentry->mrtlink;
if (mrtentry_grp == (mrtentry_t *) NULL)
return (PIM_ACTION_NOTHING);
if (mrtentry_grp->upstream != upstream_router)
return (PIM_ACTION_NOTHING); /* XXX: shoudn't happen */
if ((!(mrtentry_ptr->flags & MRTF_RP))
&& (mrtentry_ptr->flags & MRTF_SPT))
{
return (PIM_ACTION_PRUNE);
}
}
return (PIM_ACTION_NOTHING);
}
/* TODO: too long, simplify it! */
#define PIM6_JOIN_PRUNE_MINLEN (4 + PIM6_ENCODE_UNI_ADDR_LEN + 4)
int
receive_pim6_join_prune(src, dst, pim_message, datalen)
struct sockaddr_in6 *src,
*dst;
char *pim_message;
register int datalen;
{
mifi_t mifi;
struct uvif *v;
pim6_encod_uni_addr_t uni_target_addr;
pim6_encod_grp_addr_t encod_group;
pim6_encod_src_addr_t encod_src;
u_int8 *data_ptr;
u_int8 *data_ptr_start;
u_int8 num_groups;
u_int8 num_groups_tmp;
int star_star_rp_found;
u_int16 holdtime;
u_int16 num_j_srcs;
u_int16 num_j_srcs_tmp;
u_int16 num_p_srcs;
struct sockaddr_in6 source;
struct sockaddr_in6 group;
struct sockaddr_in6 target;
struct in6_addr s_mask;
struct in6_addr g_mask;
u_int8 s_flags;
u_int8 reserved;
rpentry_t *rpentry_ptr;
mrtentry_t *mrtentry_ptr;
mrtentry_t *mrtentry_srcs;
mrtentry_t *mrtentry_rp;
grpentry_t *grpentry_ptr;
u_int16 jp_value;
pim_nbr_entry_t *upstream_router;
int my_action;
int ignore_group;
rp_grp_entry_t *rp_grp_entry_ptr;
u_int8 *data_ptr_group_j_start;
u_int8 *data_ptr_group_p_start;
if ((mifi = find_vif_direct(src)) == NO_VIF)
{
/*
* Either a local vif or somehow received PIM_JOIN_PRUNE from
* non-directly connected router. Ignore it.
*/
if (local_address(src) == NO_VIF)
log(LOG_INFO, 0,
"Ignoring PIM_JOIN_PRUNE from non-neighbor router %s",
inet6_fmt(&src->sin6_addr));
return (FALSE);
}
v = &uvifs[mifi];
v->uv_in_pim6_join_prune++;
if (uvifs[mifi].uv_flags &
(VIFF_DOWN | VIFF_DISABLED | VIFF_NONBRS | MIFF_REGISTER))
{
return (FALSE); /* Shoudn't come on this interface */
}
/* sanity check for the minimum length */
if (datalen < PIM6_JOIN_PRUNE_MINLEN) {
log(LOG_NOTICE, 0,
"receive_pim6_join_prune: Join/Prune message size(%u) is"
" too short from %s on %s",
datalen, inet6_fmt(&src->sin6_addr), v->uv_name);
return(FALSE);
}
datalen -= PIM6_JOIN_PRUNE_MINLEN;
data_ptr = (u_int8 *) (pim_message + sizeof(struct pim));
/* Get the target address */
GET_EUADDR6(&uni_target_addr, data_ptr);
GET_BYTE(reserved, data_ptr);
GET_BYTE(num_groups, data_ptr);
if (num_groups == 0)
return (FALSE); /* No indication for groups in the message */
GET_HOSTSHORT(holdtime, data_ptr);
target.sin6_len = sizeof(target);
target.sin6_family = AF_INET6;
target.sin6_addr = uni_target_addr.unicast_addr;
target.sin6_scope_id = inet6_uvif2scopeid(&target, v);
/* Sanity check for the message length through all the groups */
num_groups_tmp = num_groups;
data_ptr_start = data_ptr;
while (num_groups_tmp--) {
int srclen;
/* group addr + #join + #src */
if (datalen < PIM6_ENCODE_GRP_ADDR_LEN + sizeof(u_int32_t)) {
log(LOG_NOTICE, 0,
"receive_pim6_join_prune: Join/Prune message from %s on %s is"
" too short to contain enough data",
inet6_fmt(&src->sin6_addr), v->uv_name);
return(FALSE);
}
datalen -= (PIM6_ENCODE_GRP_ADDR_LEN + sizeof(u_int32_t));
data_ptr += PIM6_ENCODE_GRP_ADDR_LEN;
/* joined source addresses and pruned source addresses */
GET_HOSTSHORT(num_j_srcs, data_ptr);
GET_HOSTSHORT(num_p_srcs, data_ptr);
srclen = (num_j_srcs + num_p_srcs) * PIM6_ENCODE_SRC_ADDR_LEN;
if (datalen < srclen) {
log(LOG_NOTICE, 0,
"receive_pim6_join_prune: Join/Prune message from %s on %s is"
" too short to contain enough data",
inet6_fmt(&src->sin6_addr), v->uv_name);
return(FALSE);
}
datalen -= srclen;
data_ptr += srclen;
}
data_ptr = data_ptr_start;
num_groups_tmp = num_groups;
if (!inet6_localif_address(&target, v) &&
!IN6_IS_ADDR_UNSPECIFIED(&uni_target_addr.unicast_addr))
{
/* if I am not the targer of the join message */
/*
* Join/Prune suppression code. This either modifies the J/P timers
* or triggers an overriding Join.
*/
/*
* Note that if we have (S,G) prune and (*,G) Join, we must send them
* in the same message. We don't bother to modify both timers here.
* The Join/Prune sending function will take care of that.
*/
upstream_router = find_pim6_nbr(&target);
if (upstream_router == (pim_nbr_entry_t *) NULL)
return (FALSE); /* I have no such neighbor */
group.sin6_len = sizeof(group);
group.sin6_family = AF_INET6;
source.sin6_len = sizeof(source);
source.sin6_family = AF_INET6;
while (num_groups--)
{
GET_EGADDR6(&encod_group, data_ptr);
GET_HOSTSHORT(num_j_srcs, data_ptr);
GET_HOSTSHORT(num_p_srcs, data_ptr);
if (encod_group.masklen > (sizeof(struct in6_addr) << 3))
continue;
MASKLEN_TO_MASK6(encod_group.masklen, g_mask);
group.sin6_addr = encod_group.mcast_addr;
group.sin6_scope_id = inet6_uvif2scopeid(&group, v);
if (!IN6_IS_ADDR_MULTICAST(&group.sin6_addr))
{
data_ptr +=
(num_j_srcs + num_p_srcs) * sizeof(pim6_encod_src_addr_t);
continue; /* Ignore this group and jump to the next */
}
if (inet6_equal(&group,&sockaddr6_d) &&
(encod_src.masklen == STAR_STAR_RP_MSK6LEN))
{
/* (*,*,RP) Join suppression */
while (num_j_srcs--)
{
GET_ESADDR6(&encod_src, data_ptr);
source.sin6_addr = encod_src.src_addr;
source.sin6_scope_id = inet6_uvif2scopeid(&source,
v);
/* sanity checks */
if (!inet6_valid_host(&source))
continue;
if (encod_src.masklen >
(sizeof(struct in6_addr) << 3))
continue;
s_flags = encod_src.flags;
MASKLEN_TO_MASK6(encod_src.masklen, s_mask);
if ((s_flags & USADDR_RP_BIT) &&
(s_flags & USADDR_WC_BIT))
{
/* This is the RP address. */
rpentry_ptr = rp_find(&source);
if (rpentry_ptr == (rpentry_t *) NULL)
continue; /* Don't have such RP. Ignore */
mrtentry_rp = rpentry_ptr->mrtlink;
my_action = join_or_prune(mrtentry_rp,
upstream_router);
if (my_action != PIM_ACTION_JOIN)
continue;
/* Check the holdtime */
/* TODO: XXX: TIMER implem. dependency! */
if (mrtentry_rp->jp_timer > holdtime)
continue;
if ((mrtentry_rp->jp_timer == holdtime)
&& (inet6_greaterthan(src, &v->uv_linklocal->pa_addr)))
continue;
/*
* Set the Join/Prune suppression timer for this
* routing entry by increasing the current Join/Prune
* timer.
*/
jp_value = pim_join_prune_period +
0.5 * (RANDOM() % pim_join_prune_period);
/* TODO: XXX: TIMER implem. dependency! */
if (mrtentry_rp->jp_timer < jp_value)
SET_TIMER(mrtentry_rp->jp_timer, jp_value);
}
} /* num_j_srcs */
while (num_p_srcs--)
{
/*
* TODO: XXX: Can we have (*,*,RP) prune message? Not in
* the spec, but anyway, the code below can handle them:
* either suppress the local (*,*,RP) prunes or override
* the prunes by sending (*,*,RP) and/or (*,G) and/or
* (S,G) Join.
*/
GET_ESADDR6(&encod_src, data_ptr);
source.sin6_addr = encod_src.src_addr;
source.sin6_scope_id = inet6_uvif2scopeid(&source,
v);
if (!inet6_valid_host(&source))
continue;
if (encod_src.masklen >
(sizeof(struct in6_addr) << 3))
continue;
s_flags = encod_src.flags;
MASKLEN_TO_MASK6(encod_src.masklen, s_mask);
if ((s_flags & USADDR_RP_BIT) &&
(s_flags & USADDR_WC_BIT))
{
/* This is the RP address. */
rpentry_ptr = rp_find(&source);
if (rpentry_ptr == (rpentry_t *) NULL)
continue; /* Don't have such RP. Ignore */
mrtentry_rp = rpentry_ptr->mrtlink;
my_action = join_or_prune(mrtentry_rp,
upstream_router);
if (my_action == PIM_ACTION_PRUNE)
{
/* TODO: XXX: TIMER implem. dependency! */
if ((mrtentry_rp->jp_timer < holdtime)
|| ((mrtentry_rp->jp_timer == holdtime)
&& (inet6_greaterthan(src, &v->uv_linklocal->pa_addr))))
{
/* Suppress the Prune */
jp_value = pim_join_prune_period+
0.5 * (RANDOM() % pim_join_prune_period);
if (mrtentry_rp->jp_timer < jp_value)
SET_TIMER(mrtentry_rp->jp_timer, jp_value);
}
}
else
if (my_action == PIM_ACTION_JOIN)
{
/* Override the Prune by scheduling a Join */
jp_value = (RANDOM() % 11) / (10 * PIM_RANDOM_DELAY_JOIN_TIMEOUT);
/* TODO: XXX: TIMER implem. dependency! */
if (mrtentry_rp->jp_timer > jp_value)
SET_TIMER(mrtentry_rp->jp_timer, jp_value);
}
/*
* Check all (*,G) and (S,G) matching to this RP. If
* my_action == JOIN, then send a Join and override
* the (*,*,RP) Prune.
*/
for (grpentry_ptr =
rpentry_ptr->cand_rp->rp_grp_next->grplink;
grpentry_ptr != (grpentry_t *) NULL;
grpentry_ptr = grpentry_ptr->rpnext)
{
my_action = join_or_prune(grpentry_ptr->grp_route,
upstream_router);
if (my_action == PIM_ACTION_JOIN)
{
jp_value = (RANDOM() % 11) / (10 * PIM_RANDOM_DELAY_JOIN_TIMEOUT);
/* TODO: XXX: TIMER implem. dependency! */
if (grpentry_ptr->grp_route->jp_timer >
jp_value)
SET_TIMER(grpentry_ptr->grp_route->jp_timer, jp_value);
}
for (mrtentry_srcs = grpentry_ptr->mrtlink;
mrtentry_srcs != (mrtentry_t *) NULL;
mrtentry_srcs = mrtentry_srcs->grpnext)
{
my_action = join_or_prune(mrtentry_srcs,
upstream_router);
if (my_action == PIM_ACTION_JOIN)
{
jp_value = (RANDOM() % 11) / (10 * PIM_RANDOM_DELAY_JOIN_TIMEOUT);
/* TODO: XXX: TIMER implem. dependency! */
if (mrtentry_srcs->jp_timer > jp_value)
SET_TIMER(mrtentry_srcs->jp_timer, jp_value);
}
} /* For all (S,G) */
} /* For all (*,G) */
}
} /* num_p_srcs */
continue; /* This was (*,*,RP) suppression */
}
/* (*,G) or (S,G) suppression */
/*
* TODO: XXX: currently, accumulated groups (i.e. group_masklen <
* group_address_lengt) are not implemented. Just need to create
* a loop and apply the procedure below for all groups matching
* the prefix.
*/
while (num_j_srcs--)
{
GET_ESADDR6(&encod_src, data_ptr);
source.sin6_addr = encod_src.src_addr;
source.sin6_scope_id = inet6_uvif2scopeid(&source,v);
if (!inet6_valid_host(&source))
continue;
if (encod_src.masklen >
(sizeof(struct in6_addr) << 3))
continue;
s_flags = encod_src.flags;
MASKLEN_TO_MASK6(encod_src.masklen, s_mask);
if ((s_flags & USADDR_RP_BIT) && (s_flags & USADDR_WC_BIT))
{
/* (*,G) JOIN_REQUEST (toward the RP) */
mrtentry_ptr = find_route(&sockaddr6_any , &group, MRTF_WC,
DONT_CREATE);
my_action = join_or_prune(mrtentry_ptr, upstream_router);
if (my_action != PIM_ACTION_JOIN)
continue;
/* (*,G) Join suppresion */
if (!inet6_equal(&source,&mrtentry_ptr->group->active_rp_grp->rp->rpentry->address))
continue; /* The RP address doesn't match.
* Ignore. */
/* Check the holdtime */
/* TODO: XXX: TIMER implem. dependency! */
if (mrtentry_ptr->jp_timer > holdtime)
continue;
if ((mrtentry_ptr->jp_timer == holdtime)
&& (inet6_greaterthan(src, &v->uv_linklocal->pa_addr)))
continue;
jp_value = pim_join_prune_period +
0.5 * (RANDOM() % pim_join_prune_period);
if (mrtentry_ptr->jp_timer < jp_value)
SET_TIMER(mrtentry_ptr->jp_timer, jp_value);
continue;
} /* End of (*,G) Join suppression */
/* (S,G) Join suppresion */
mrtentry_ptr = find_route(&source, &group, MRTF_SG,
DONT_CREATE);
my_action = join_or_prune(mrtentry_ptr, upstream_router);
if (my_action != PIM_ACTION_JOIN)
continue;
/* Check the holdtime */
/* TODO: XXX: TIMER implem. dependency! */
if (mrtentry_ptr->jp_timer > holdtime)
continue;
if ((mrtentry_ptr->jp_timer == holdtime)
&& (inet6_greaterthan(src, &v->uv_linklocal->pa_addr)))
continue;
jp_value = pim_join_prune_period +
0.5 * (RANDOM() % pim_join_prune_period);
if (mrtentry_ptr->jp_timer < jp_value)
SET_TIMER(mrtentry_ptr->jp_timer, jp_value);
continue;
}
/* Prunes suppression */
while (num_p_srcs--)
{
GET_ESADDR6(&encod_src, data_ptr);
source.sin6_addr = encod_src.src_addr;
source.sin6_scope_id = inet6_uvif2scopeid(&source,
v);
if (encod_src.masklen >
(sizeof(struct in6_addr) << 3))
continue;
if (!inet6_valid_host(&source))
continue;
s_flags = encod_src.flags;
MASKLEN_TO_MASK6(encod_src.masklen, s_mask);
if ((s_flags & USADDR_RP_BIT) && (s_flags & USADDR_WC_BIT))
{
/* (*,G) prune suppression */
rpentry_ptr = rp_match(&source);
if ((rpentry_ptr == (rpentry_t *) NULL)
|| (!inet6_equal(&rpentry_ptr->address , &source)))
continue; /* No such RP or it is different.
* Ignore */
mrtentry_ptr = find_route(&sockaddr6_any, &group, MRTF_WC,
DONT_CREATE);
my_action = join_or_prune(mrtentry_ptr, upstream_router);
if (my_action == PIM_ACTION_PRUNE)
{
/* TODO: XXX: TIMER implem. dependency! */
if ((mrtentry_ptr->jp_timer < holdtime)
|| ((mrtentry_ptr->jp_timer == holdtime)
&& (inet6_greaterthan(src, &v->uv_linklocal->pa_addr))))
{
/* Suppress the Prune */
jp_value = pim_join_prune_period +
0.5 * (RANDOM() % pim_join_prune_period);
if (mrtentry_ptr->jp_timer < jp_value)
SET_TIMER(mrtentry_ptr->jp_timer, jp_value);
}
}
else
if (my_action == PIM_ACTION_JOIN)
{
/* Override the Prune by scheduling a Join */
jp_value = (RANDOM() % 11) / (10 * PIM_RANDOM_DELAY_JOIN_TIMEOUT);
/* TODO: XXX: TIMER implem. dependency! */
if (mrtentry_ptr->jp_timer > jp_value)
SET_TIMER(mrtentry_ptr->jp_timer, jp_value);
}
/*
* Check all (S,G) entries for this group. If my_action
* == JOIN, then send the Join and override the (*,G)
* Prune.
*/
for (mrtentry_srcs = mrtentry_ptr->group->mrtlink;
mrtentry_srcs != (mrtentry_t *) NULL;
mrtentry_srcs = mrtentry_srcs->grpnext)
{
my_action = join_or_prune(mrtentry_srcs,
upstream_router);
if (my_action == PIM_ACTION_JOIN)
{
jp_value = (RANDOM() % 11) / (10 * PIM_RANDOM_DELAY_JOIN_TIMEOUT);
/* TODO: XXX: TIMER implem. dependency! */
if (mrtentry_ptr->jp_timer > jp_value)
SET_TIMER(mrtentry_ptr->jp_timer, jp_value);
}
} /* For all (S,G) */
continue; /* End of (*,G) prune suppression */
}
/* (S,G) prune suppression */
mrtentry_ptr = find_route(&source, &group, MRTF_SG,
DONT_CREATE);
my_action = join_or_prune(mrtentry_ptr, upstream_router);
if (my_action == PIM_ACTION_PRUNE)
{
/* Suppress the (S,G) Prune */
/* TODO: XXX: TIMER implem. dependency! */
if ((mrtentry_ptr->jp_timer < holdtime)
|| ((mrtentry_ptr->jp_timer == holdtime)
&& (inet6_greaterthan(src, &v->uv_linklocal->pa_addr))))
{
jp_value = pim_join_prune_period +
0.5 * (RANDOM() % pim_join_prune_period);
if (mrtentry_ptr->jp_timer < jp_value)
SET_TIMER(mrtentry_ptr->jp_timer, jp_value);
}
}
else
if (my_action == PIM_ACTION_JOIN)
{
/* Override the Prune by scheduling a Join */
jp_value = (RANDOM() % 11) / (10 * PIM_RANDOM_DELAY_JOIN_TIMEOUT);
/* TODO: XXX: TIMER implem. dependency! */
if (mrtentry_ptr->jp_timer > jp_value)
SET_TIMER(mrtentry_ptr->jp_timer, jp_value);
}
} /* while (num_p_srcs--) */
} /* while (num_groups--) */
return (TRUE);
} /* End of Join/Prune suppression code */
/* I am the target of this join, so process the message */
/*
* The spec says that if there is (*,G) Join, it has priority over old
* existing ~(S,G) prunes in the routing table. However, if the (*,G)
* Join and the ~(S,G) prune are in the same message, ~(S,G) has the
* priority. The spec doesn't say it, but I think the same is true for
* (*,*,RP) and ~(S,G) prunes.
*
* The code below do: (1) Check the whole message for (*,*,RP) Joins. (1.1)
* If found, clean all pruned_oifs for all (*,G) and all (S,G) for each
* RP in the list, but do not update the kernel cache. Then go back to
* the beginning of the message and start processing for each group: (2)
* Check for Prunes. If no prunes, process the Joins. (3) If there are
* Prunes: (3.1) Scan the Join part for existing (*,G) Join. (3.1.1) If
* there is (*,G) Join, clear join interface from the pruned_oifs for all
* (S,G), but DO NOT flush the change to the kernel (by using
* change_interfaces() for example) (3.2) After the pruned_oifs are
* eventually cleared in (3.1.1), process the Prune part of the message
* normally (setting the prune_oifs and flashing the changes to the
* (kernel). (3.3) After the Prune part is processed, process the Join
* part normally (by applying any changes to the kernel) (4) If there
* were (*,*,RP) Join/Prune, process them.
*
* If the Join/Prune list is too long, it may result in long processing
* overhead. The idea above is not to place any wrong info in the kernel,
* because it may result in short-time existing traffic forwarding on
* wrong interface. Hopefully, in the future will find a better way to
* implement it.
*/
IF_DEBUG(DEBUG_PIM_JOIN_PRUNE)
log(LOG_DEBUG,0,"I'm the target of the JOIN/PRUNE message");
num_groups_tmp = num_groups;
data_ptr_start = data_ptr;
star_star_rp_found = FALSE; /* Indicating whether we have (*,*,RP) join */
IF_DEBUG(DEBUG_PIM_JOIN_PRUNE)
log(LOG_DEBUG,0,"Number of groups to process : %d",num_groups_tmp);
while (num_groups_tmp--)
{
/* Search for (*,*,RP) Join */
GET_EGADDR6(&encod_group, data_ptr);
GET_HOSTSHORT(num_j_srcs, data_ptr);
GET_HOSTSHORT(num_p_srcs, data_ptr);
group.sin6_addr = encod_group.mcast_addr;
group.sin6_scope_id = inet6_uvif2scopeid(&group, v);
IF_DEBUG(DEBUG_PIM_JOIN_PRUNE)
{
log(LOG_DEBUG, 0,
"Group to process : %s",inet6_fmt(&encod_group.mcast_addr));
log(LOG_DEBUG, 0,
"Number of join : %d",num_j_srcs );
log(LOG_DEBUG, 0,
"Number of prune : %d",num_p_srcs );
}
if (!(inet6_equal(&group,&sockaddr6_d))
|| (encod_src.masklen != STAR_STAR_RP_MSK6LEN))
{
/* This is not (*,*,RP). Jump to the next group. */
data_ptr += (num_j_srcs + num_p_srcs) * sizeof(pim6_encod_src_addr_t);
IF_DEBUG(DEBUG_PIM_JOIN_PRUNE)
{
log(LOG_DEBUG, 0,
"I'm looking for the (*,*,RP) entry , skip to next entry");
}
continue;
}
/*
* (*,*,RP) found. For each RP and each (*,G) and each (S,G) clear
* the pruned oif, but do not update the kernel.
*/
star_star_rp_found = TRUE;
while (num_j_srcs--)
{
GET_ESADDR6(&encod_src, data_ptr);
source.sin6_addr = encod_src.src_addr;
rpentry_ptr = rp_find(&source);
if (rpentry_ptr == (rpentry_t *) NULL)
continue;
for (rp_grp_entry_ptr = rpentry_ptr->cand_rp->rp_grp_next;
rp_grp_entry_ptr != (rp_grp_entry_t *) NULL;
rp_grp_entry_ptr = rp_grp_entry_ptr->rp_grp_next)
{
for (grpentry_ptr = rp_grp_entry_ptr->grplink;
grpentry_ptr != (grpentry_t *) NULL;
grpentry_ptr = grpentry_ptr->rpnext)
{
if (grpentry_ptr->grp_route != (mrtentry_t *) NULL)
IF_CLR(mifi, &grpentry_ptr->grp_route->pruned_oifs);
for (mrtentry_ptr = grpentry_ptr->mrtlink;
mrtentry_ptr != (mrtentry_t *) NULL;
mrtentry_ptr = mrtentry_ptr->grpnext)
IF_CLR(mifi, &mrtentry_ptr->pruned_oifs);
}
}
}
data_ptr += (num_p_srcs) * sizeof(pim6_encod_src_addr_t);
}
/*
* Start processing the groups. If this is (*,*,RP), skip it, but process
* it at the end.don't forget to reinit data_ptr!
*/
data_ptr = data_ptr_start;
num_groups_tmp = num_groups;
while (num_groups_tmp--)
{
GET_EGADDR6(&encod_group, data_ptr);
GET_HOSTSHORT(num_j_srcs, data_ptr);
GET_HOSTSHORT(num_p_srcs, data_ptr);
group.sin6_addr = encod_group.mcast_addr;
group.sin6_scope_id = inet6_uvif2scopeid(&group, v);
IF_DEBUG(DEBUG_PIM_JOIN_PRUNE)
{
log(LOG_DEBUG,0,"Group to process : %s",inet6_fmt(&encod_group.mcast_addr));
log(LOG_DEBUG,0,"Number of join : %d",num_j_srcs );
log(LOG_DEBUG,0,"Number of prune : %d",num_p_srcs );
}
if (!IN6_IS_ADDR_MULTICAST(&group.sin6_addr))
{
data_ptr += (num_j_srcs + num_p_srcs) * sizeof(pim6_encod_src_addr_t);
continue; /* Ignore this group and jump to the next one */
}
if (inet6_equal(&group, &sockaddr6_d)
&& (encod_group.masklen == STAR_STAR_RP_MSK6LEN))
{
/* This is (*,*,RP). Jump to the next group. */
IF_DEBUG(DEBUG_PIM_JOIN_PRUNE) {
log(LOG_DEBUG, 0, "This is (*,*,RP). Jump to next.");
}
data_ptr += (num_j_srcs + num_p_srcs) * sizeof(pim6_encod_src_addr_t);
continue;
}
rpentry_ptr = rp_match(&group);
if (rpentry_ptr == (rpentry_t *) NULL)
continue;
IF_DEBUG(DEBUG_PIM_JOIN_PRUNE)
log(LOG_DEBUG,0,"The rp for this JOIN/PRUNE is %s",inet6_fmt(&rpentry_ptr->address.sin6_addr));
data_ptr_group_j_start = data_ptr;
data_ptr_group_p_start = data_ptr + num_j_srcs * sizeof(pim6_encod_src_addr_t);
/*
* Scan the Join part for (*,G) Join and then clear the particular
* interface from pruned_oifs for all (S,G). If the RP address in the
* Join message is different from the local match, ignore the whole
* group.
*/
num_j_srcs_tmp = num_j_srcs;
ignore_group = FALSE;
while (num_j_srcs_tmp--)
{
GET_ESADDR6(&encod_src, data_ptr);
source.sin6_addr=encod_src.src_addr;
source.sin6_scope_id = inet6_uvif2scopeid(&source,v);
if ((encod_src.flags & USADDR_RP_BIT)
&& (encod_src.flags & USADDR_WC_BIT))
{
/*
* This is the RP address, i.e. (*,G) Join. Check if the
* RP-mapping is consistent and if "yes", then Reset the
* pruned_oifs for all (S,G) entries.
*/
if(!inet6_equal(&rpentry_ptr->address, &source))
{
ignore_group = TRUE;
IF_DEBUG(DEBUG_PIM_JOIN_PRUNE)
log(LOG_DEBUG,0,"And I'm not the RP for this address");
break;
}
mrtentry_ptr = find_route(&sockaddr6_any, &group,
MRTF_WC, DONT_CREATE);
if (mrtentry_ptr != (mrtentry_t *) NULL)
{
for (mrtentry_srcs = mrtentry_ptr->group->mrtlink;
mrtentry_srcs != (mrtentry_t *) NULL;
mrtentry_srcs = mrtentry_srcs->grpnext)
IF_CLR(mifi, &mrtentry_srcs->pruned_oifs);
}
break;
}
}
if (ignore_group == TRUE)
continue;
data_ptr = data_ptr_group_p_start;
/* Process the Prune part first */
while (num_p_srcs--)
{
GET_ESADDR6(&encod_src, data_ptr);
source.sin6_addr = encod_src.src_addr;
source.sin6_scope_id = inet6_uvif2scopeid(&source, v);
if (!inet6_valid_host(&source))
continue;
s_flags = encod_src.flags;
if (!(s_flags & (USADDR_WC_BIT | USADDR_RP_BIT)))
{
/* (S,G) prune sent toward S */
mrtentry_ptr = find_route(&source, &group, MRTF_SG,
DONT_CREATE);
if (mrtentry_ptr == (mrtentry_t *) NULL)
continue; /* I don't have (S,G) to prune. Ignore. */
/*
* If the link is point-to-point, timeout the oif
* immediately, otherwise decrease the timer to allow other
* downstream routers to override the prune.
*/
/* TODO: XXX: increase the entry timer? */
if (v->uv_flags & VIFF_POINT_TO_POINT)
{
FIRE_TIMER(mrtentry_ptr->vif_timers[mifi]);
}
else
{
/* TODO: XXX: TIMER implem. dependency! */
if (mrtentry_ptr->vif_timers[mifi] >
mrtentry_ptr->vif_deletion_delay[mifi])
SET_TIMER(mrtentry_ptr->vif_timers[mifi],
mrtentry_ptr->vif_deletion_delay[mifi]);
}
IF_TIMER_NOT_SET(mrtentry_ptr->vif_timers[mifi])
{
IF_CLR(mifi, &mrtentry_ptr->joined_oifs);
IF_SET(mifi, &mrtentry_ptr->pruned_oifs);
change_interfaces(mrtentry_ptr,
mrtentry_ptr->incoming,
&mrtentry_ptr->joined_oifs,
&mrtentry_ptr->pruned_oifs,
&mrtentry_ptr->leaves,
&mrtentry_ptr->asserted_oifs, 0);
}
continue;
}
if ((s_flags & USADDR_RP_BIT)
&& (!(s_flags & USADDR_WC_BIT)))
{
/* ~(S,G)RPbit prune sent toward the RP */
mrtentry_ptr = find_route(&source, &group, MRTF_SG,
DONT_CREATE);
if (mrtentry_ptr != (mrtentry_t *) NULL)
{
SET_TIMER(mrtentry_ptr->timer, holdtime);
if (v->uv_flags & VIFF_POINT_TO_POINT)
{
FIRE_TIMER(mrtentry_ptr->vif_timers[mifi]);
}
else
{
/* TODO: XXX: TIMER implem. dependency! */
if (mrtentry_ptr->vif_timers[mifi] >
mrtentry_ptr->vif_deletion_delay[mifi])
SET_TIMER(mrtentry_ptr->vif_timers[mifi],
mrtentry_ptr->vif_deletion_delay[mifi]);
}
IF_TIMER_NOT_SET(mrtentry_ptr->vif_timers[mifi])
{
IF_CLR(mifi, &mrtentry_ptr->joined_oifs);
IF_SET(mifi, &mrtentry_ptr->pruned_oifs);
change_interfaces(mrtentry_ptr,
mrtentry_ptr->incoming,
&mrtentry_ptr->joined_oifs,
&mrtentry_ptr->pruned_oifs,
&mrtentry_ptr->leaves,
&mrtentry_ptr->asserted_oifs, 0);
}
continue;
}
/* There is no (S,G) entry. Check for (*,G) or (*,*,RP) */
mrtentry_ptr = find_route(NULL, &group,
MRTF_WC | MRTF_PMBR,
DONT_CREATE);
if (mrtentry_ptr != (mrtentry_t *) NULL)
{
mrtentry_ptr = find_route(&source, &group,
MRTF_SG | MRTF_RP,
CREATE);
if (mrtentry_ptr == (mrtentry_t *) NULL)
continue;
mrtentry_ptr->flags &= ~MRTF_NEW;
RESET_TIMER(mrtentry_ptr->vif_timers[mifi]);
/*
* TODO: XXX: The spec doens't say what value to use for
* the entry time. Use the J/P holdtime.
*/
SET_TIMER(mrtentry_ptr->timer, holdtime);
/*
* TODO: XXX: The spec says to delete the oif. However,
* its timer only should be lowered, so the prune can be
* overwritten on multiaccess LAN. Spec BUG.
*/
IF_CLR(mifi, &mrtentry_ptr->joined_oifs);
IF_SET(mifi, &mrtentry_ptr->pruned_oifs);
change_interfaces(mrtentry_ptr,
mrtentry_ptr->incoming,
&mrtentry_ptr->joined_oifs,
&mrtentry_ptr->pruned_oifs,
&mrtentry_ptr->leaves,
&mrtentry_ptr->asserted_oifs, 0);
}
continue;
}
if ((s_flags & USADDR_RP_BIT) && (s_flags & USADDR_WC_BIT))
{
/* (*,G) Prune */
mrtentry_ptr = find_route(NULL, &group,
MRTF_WC | MRTF_PMBR,
DONT_CREATE);
if (mrtentry_ptr != (mrtentry_t *) NULL)
{
if (mrtentry_ptr->flags & MRTF_WC)
{
/*
* TODO: XXX: Should check the whole Prune list in
* advance for (*,G) prune and if the RP address does
* not match the local RP-map, then ignore the whole
* group, not only this particular (*,G) prune.
*/
if (!inet6_equal(&mrtentry_ptr->group->active_rp_grp->rp->rpentry->address, &source ))
continue; /* The RP address doesn't match. */
if (v->uv_flags & VIFF_POINT_TO_POINT)
{
FIRE_TIMER(mrtentry_ptr->vif_timers[mifi]);
}
else
{
/* TODO: XXX: TIMER implem. dependency! */
if (mrtentry_ptr->vif_timers[mifi] >
mrtentry_ptr->vif_deletion_delay[mifi])
SET_TIMER(mrtentry_ptr->vif_timers[mifi],
mrtentry_ptr->vif_deletion_delay[mifi]);
}
IF_TIMER_NOT_SET(mrtentry_ptr->vif_timers[mifi])
{
IF_CLR(mifi, &mrtentry_ptr->joined_oifs);
IF_SET(mifi, &mrtentry_ptr->pruned_oifs);
change_interfaces(mrtentry_ptr,
mrtentry_ptr->incoming,
&mrtentry_ptr->joined_oifs,
&mrtentry_ptr->pruned_oifs,
&mrtentry_ptr->leaves,
&mrtentry_ptr->asserted_oifs, 0);
}
continue;
}
/* No (*,G) entry, but found (*,*,RP). Create (*,G) */
if (!inet6_equal(&mrtentry_ptr->source->address, &source))
continue; /* The RP address doesn't match. */
mrtentry_ptr = find_route(NULL, &group,
MRTF_WC, CREATE);
if (mrtentry_ptr == (mrtentry_t *) NULL)
continue;
mrtentry_ptr->flags &= ~MRTF_NEW;
RESET_TIMER(mrtentry_ptr->vif_timers[mifi]);
/*
* TODO: XXX: should only lower the oif timer, so it can
* be overwritten on multiaccess LAN. Spec bug.
*/
IF_CLR(mifi, &mrtentry_ptr->joined_oifs);
IF_SET(mifi, &mrtentry_ptr->pruned_oifs);
change_interfaces(mrtentry_ptr,
mrtentry_ptr->incoming,
&mrtentry_ptr->joined_oifs,
&mrtentry_ptr->pruned_oifs,
&mrtentry_ptr->leaves,
&mrtentry_ptr->asserted_oifs, 0);
} /* (*,G) or (*,*,RP) found */
} /* (*,G) prune */
} /* while(num_p_srcs--) */
/* End of (S,G) and (*,G) Prune handling */
/* Jump back to the Join part and process it */
data_ptr = data_ptr_group_j_start;
while (num_j_srcs--)
{
GET_ESADDR6(&encod_src, data_ptr);
source.sin6_addr = encod_src.src_addr;
source.sin6_scope_id = inet6_uvif2scopeid(&source, v);
if (!inet6_valid_host(&source))
continue;
s_flags = encod_src.flags;
MASKLEN_TO_MASK6(encod_src.masklen, s_mask);
if ((s_flags & USADDR_WC_BIT)
&& (s_flags & USADDR_RP_BIT))
{
/* (*,G) Join toward RP */
/*
* It has been checked already that this RP address is the
* same as the local RP-maping.
*/
mrtentry_ptr = find_route(NULL, &group, MRTF_WC,
CREATE);
if (mrtentry_ptr == (mrtentry_t *) NULL)
continue;
IF_SET(mifi, &mrtentry_ptr->joined_oifs);
IF_CLR(mifi, &mrtentry_ptr->pruned_oifs);
IF_CLR(mifi, &mrtentry_ptr->asserted_oifs);
/* TODO: XXX: TIMER implem. dependency! */
if (mrtentry_ptr->vif_timers[mifi] < holdtime)
{
SET_TIMER(mrtentry_ptr->vif_timers[mifi], holdtime);
mrtentry_ptr->vif_deletion_delay[mifi] = holdtime / 3;
}
if (mrtentry_ptr->timer < holdtime)
SET_TIMER(mrtentry_ptr->timer, holdtime);
mrtentry_ptr->flags &= ~MRTF_NEW;
change_interfaces(mrtentry_ptr,
mrtentry_ptr->incoming,
&mrtentry_ptr->joined_oifs,
&mrtentry_ptr->pruned_oifs,
&mrtentry_ptr->leaves,
&mrtentry_ptr->asserted_oifs, 0);
/*
* Need to update the (S,G) entries, because of the previous
* cleaning of the pruned_oifs. The reason is that if the
* oifs for (*,G) weren't changed, the (S,G) entries won't be
* updated by change_interfaces()
*/
for (mrtentry_srcs = mrtentry_ptr->group->mrtlink;
mrtentry_srcs != (mrtentry_t *) NULL;
mrtentry_srcs = mrtentry_srcs->grpnext)
change_interfaces(mrtentry_srcs,
mrtentry_srcs->incoming,
&mrtentry_srcs->joined_oifs,
&mrtentry_srcs->pruned_oifs,
&mrtentry_srcs->leaves,
&mrtentry_srcs->asserted_oifs, 0);
continue;
}
if (!(s_flags & (USADDR_WC_BIT | USADDR_RP_BIT)))
{
/* (S,G) Join toward S */
if (mifi == get_iif(&source))
continue; /* Ignore this (S,G) Join */
mrtentry_ptr = find_route(&source, &group, MRTF_SG, CREATE);
if (mrtentry_ptr == (mrtentry_t *) NULL)
continue;
IF_SET(mifi, &mrtentry_ptr->joined_oifs);
IF_CLR(mifi, &mrtentry_ptr->pruned_oifs);
IF_CLR(mifi, &mrtentry_ptr->asserted_oifs);
/* TODO: XXX: TIMER implem. dependency! */
if (mrtentry_ptr->vif_timers[mifi] < holdtime)
{
SET_TIMER(mrtentry_ptr->vif_timers[mifi], holdtime);
mrtentry_ptr->vif_deletion_delay[mifi] = holdtime / 3;
}
if (mrtentry_ptr->timer < holdtime)
SET_TIMER(mrtentry_ptr->timer, holdtime);
/*
* TODO: if this is a new entry, send immediately the Join
* message toward S. The Join/Prune timer for new entries is
* 0, but it does not means the message will be sent
* immediately.
*/
mrtentry_ptr->flags &= ~MRTF_NEW;
/*
* Note that we must create (S,G) without the RPbit set. If
* we already had such entry, change_interfaces() will reset
* the RPbit propertly.
*/
change_interfaces(mrtentry_ptr,
mrtentry_ptr->source->incoming,
&mrtentry_ptr->joined_oifs,
&mrtentry_ptr->pruned_oifs,
&mrtentry_ptr->leaves,
&mrtentry_ptr->asserted_oifs, 0);
continue;
}
} /* while(num_j_srcs--) */
} /* for all groups */
/* Now process the (*,*,RP) Join/Prune */
if (star_star_rp_found == TRUE)
return (TRUE);
data_ptr = data_ptr_start;
while (num_groups--)
{
/*
* The conservative approach is to scan again the whole message, just
* in case if we have more than one (*,*,RP) requests.
*/
GET_EGADDR6(&encod_group, data_ptr);
GET_HOSTSHORT(num_j_srcs, data_ptr);
GET_HOSTSHORT(num_p_srcs, data_ptr);
group.sin6_addr = encod_group.mcast_addr;
group.sin6_scope_id = inet6_uvif2scopeid(&group, v);
if (!inet6_equal(&group,&sockaddr6_d)
|| (encod_group.masklen != STAR_STAR_RP_MSK6LEN))
{
/* This is not (*,*,RP). Jump to the next group. */
data_ptr +=
(num_j_srcs + num_p_srcs) * sizeof(pim6_encod_src_addr_t);
continue;
}
/* (*,*,RP) found */
while (num_j_srcs--)
{
/* TODO: XXX: check that the iif is different from the Join oifs */
GET_ESADDR6(&encod_src, data_ptr);
source.sin6_addr = encod_src.src_addr;
source.sin6_scope_id = inet6_uvif2scopeid(&source,
v);
if (!inet6_valid_host(&source))
continue;
s_flags = encod_src.flags;
MASKLEN_TO_MASK6(encod_src.masklen, s_mask);
mrtentry_ptr = find_route(&source, NULL, MRTF_PMBR,
CREATE);
if (mrtentry_ptr == (mrtentry_t *) NULL)
continue;
IF_SET(mifi, &mrtentry_ptr->joined_oifs);
IF_CLR(mifi, &mrtentry_ptr->pruned_oifs);
IF_CLR(mifi, &mrtentry_ptr->asserted_oifs);
/* TODO: XXX: TIMER implem. dependency! */
if (mrtentry_ptr->vif_timers[mifi] < holdtime)
{
SET_TIMER(mrtentry_ptr->vif_timers[mifi], holdtime);
mrtentry_ptr->vif_deletion_delay[mifi] = holdtime / 3;
}
if (mrtentry_ptr->timer < holdtime)
SET_TIMER(mrtentry_ptr->timer, holdtime);
mrtentry_ptr->flags &= ~MRTF_NEW;
change_interfaces(mrtentry_ptr,
mrtentry_ptr->incoming,
&mrtentry_ptr->joined_oifs,
&mrtentry_ptr->pruned_oifs,
&mrtentry_ptr->leaves,
&mrtentry_ptr->asserted_oifs, 0);
/*
* Need to update the (S,G) and (*,G) entries, because of the
* previous cleaning of the pruned_oifs. The reason is that if
* the oifs for (*,*,RP) weren't changed, the (*,G) and (S,G)
* entries won't be updated by change_interfaces()
*/
for (rp_grp_entry_ptr = mrtentry_ptr->source->cand_rp->rp_grp_next;
rp_grp_entry_ptr != (rp_grp_entry_t *) NULL;
rp_grp_entry_ptr = rp_grp_entry_ptr->rp_grp_next)
for (grpentry_ptr = rp_grp_entry_ptr->grplink;
grpentry_ptr != (grpentry_t *) NULL;
grpentry_ptr = grpentry_ptr->rpnext)
{
/* Update the (*,G) entry */
change_interfaces(grpentry_ptr->grp_route,
grpentry_ptr->grp_route->incoming,
&grpentry_ptr->grp_route->joined_oifs,
&grpentry_ptr->grp_route->pruned_oifs,
&grpentry_ptr->grp_route->leaves,
&grpentry_ptr->grp_route->asserted_oifs, 0);
/* Update the (S,G) entries */
for (mrtentry_srcs = grpentry_ptr->mrtlink;
mrtentry_srcs != (mrtentry_t *) NULL;
mrtentry_srcs = mrtentry_srcs->grpnext)
change_interfaces(mrtentry_srcs,
mrtentry_srcs->incoming,
&mrtentry_srcs->joined_oifs,
&mrtentry_srcs->pruned_oifs,
&mrtentry_srcs->leaves,
&mrtentry_srcs->asserted_oifs, 0);
}
continue;
}
while (num_p_srcs--)
{
/* TODO: XXX: can we have (*,*,RP) Prune? */
GET_ESADDR6(&encod_src, data_ptr);
source.sin6_addr = encod_src.src_addr;
source.sin6_scope_id = inet6_uvif2scopeid(&source,
v);
if (!inet6_valid_host(&source))
continue;
s_flags = encod_src.flags;
MASKLEN_TO_MASK6(encod_src.masklen, s_mask);
mrtentry_ptr = find_route(&source, NULL , MRTF_PMBR,
DONT_CREATE);
if (mrtentry_ptr == (mrtentry_t *) NULL)
continue;
/*
* If the link is point-to-point, timeout the oif immediately,
* otherwise decrease the timer to allow other downstream routers
* to override the prune.
*/
/* TODO: XXX: increase the entry timer? */
if (v->uv_flags & VIFF_POINT_TO_POINT)
{
FIRE_TIMER(mrtentry_ptr->vif_timers[mifi]);
}
else
{
/* TODO: XXX: TIMER implem. dependency! */
if (mrtentry_ptr->vif_timers[mifi] >
mrtentry_ptr->vif_deletion_delay[mifi])
SET_TIMER(mrtentry_ptr->vif_timers[mifi],
mrtentry_ptr->vif_deletion_delay[mifi]);
}
IF_TIMER_NOT_SET(mrtentry_ptr->vif_timers[mifi])
{
IF_CLR(mifi, &mrtentry_ptr->joined_oifs);
IF_SET(mifi, &mrtentry_ptr->pruned_oifs);
IF_SET(mifi, &mrtentry_ptr->asserted_oifs);
change_interfaces(mrtentry_ptr,
mrtentry_ptr->incoming,
&mrtentry_ptr->joined_oifs,
&mrtentry_ptr->pruned_oifs,
&mrtentry_ptr->leaves,
&mrtentry_ptr->asserted_oifs, 0);
}
}
} /* For all groups processing (*,*,R) */
return (TRUE);
}
/*
* TODO: NOT USED, probably buggy, but may need it in the future.
*/
/*
* TODO: create two functions: periodic which timeout the timers and
* non-periodic which only check but don't timeout the timers.
*/
/*
* Create and send Join/Prune messages per interface. Only the entries which
* have the Join/Prune timer expired are included. In the special case when
* we have ~(S,G)RPbit Prune entry, we must include any (*,G) or (*,*,RP)
* Currently the whole table is scanned. In the future will have all routing
* entries linked in a chain with the corresponding upstream pim_nbr_entry.
*
* If pim_nbr is not NULL, then send to only this particular PIM neighbor,
*/
int
send_periodic_pim6_join_prune(mifi, pim_nbr, holdtime)
mifi_t mifi;
pim_nbr_entry_t *pim_nbr;
u_int16 holdtime;
{
grpentry_t *grpentry_ptr;
mrtentry_t *mrtentry_ptr;
rpentry_t *rpentry_ptr;
struct sockaddr_in6 src_addr;
struct uvif *v;
pim_nbr_entry_t *pim_nbr_ptr;
cand_rp_t *cand_rp_ptr;
/*
* Walk through all routing entries. The iif must match to include the
* entry. Check first the (*,G) entry and then all associated (S,G). At
* the end of the message will add any (*,*,RP) entries. TODO: check
* other PIM-SM implementations and decide the more appropriate place to
* put the (*,*,RP) entries: in the beginning of the message or at the
* end.
*/
v = &uvifs[mifi];
/* Check the (*,G) and (S,G) entries */
for (grpentry_ptr = grplist; grpentry_ptr != (grpentry_t *) NULL;
grpentry_ptr = grpentry_ptr->next)
{
mrtentry_ptr = grpentry_ptr->grp_route;
/* TODO: XXX: TIMER implem. dependency! */
if ((mrtentry_ptr != (mrtentry_t *) NULL)
&& (mrtentry_ptr->incoming == mifi)
&& (mrtentry_ptr->jp_timer <= timer_interval))
{
/* If join/prune to a particular neighbor only was specified */
if ((pim_nbr != (pim_nbr_entry_t *) NULL)
&& (mrtentry_ptr->upstream != pim_nbr))
continue;
/* TODO: XXX: The J/P suppression timer is not in the spec! */
if (!IF_ISEMPTY(&mrtentry_ptr->joined_oifs) ||
(v->uv_flags & VIFF_DR))
{
add_jp_entry(mrtentry_ptr->upstream, holdtime,
&grpentry_ptr->group,
SINGLE_GRP_MSK6LEN,
&grpentry_ptr->rpaddr,
SINGLE_SRC_MSK6LEN, 0, PIM_ACTION_JOIN);
}
/* TODO: XXX: TIMER implem. dependency! */
if (IF_ISEMPTY(&mrtentry_ptr->joined_oifs)
&& (!(v->uv_flags & VIFF_DR))
&& (mrtentry_ptr->jp_timer <= timer_interval))
{
add_jp_entry(mrtentry_ptr->upstream, holdtime,
&grpentry_ptr->group, SINGLE_GRP_MSK6LEN,
&grpentry_ptr->rpaddr,
SINGLE_SRC_MSK6LEN, 0, PIM_ACTION_PRUNE);
}
}
/* Check the (S,G) entries */
for (mrtentry_ptr = grpentry_ptr->mrtlink;
mrtentry_ptr != (mrtentry_t *) NULL;
mrtentry_ptr = mrtentry_ptr->grpnext)
{
/* If join/prune to a particular neighbor only was specified */
if ((pim_nbr != (pim_nbr_entry_t *) NULL)
&& (mrtentry_ptr->upstream != pim_nbr))
continue;
if (mrtentry_ptr->flags & MRTF_RP)
{
/* RPbit set */
src_addr = mrtentry_ptr->source->address;
if (IF_ISEMPTY(&mrtentry_ptr->joined_oifs)
|| ((find_vif_direct_local(&src_addr) != NO_VIF)
&& grpentry_ptr->grp_route != (mrtentry_t *) NULL))
/* TODO: XXX: TIMER implem. dependency! */
if ((grpentry_ptr->grp_route->incoming == mifi)
&& (grpentry_ptr->grp_route->jp_timer
<= timer_interval))
/* S is directly connected. Send toward RP */
add_jp_entry(grpentry_ptr->grp_route->upstream,
holdtime,
&grpentry_ptr->group, SINGLE_GRP_MSK6LEN,
&src_addr, SINGLE_SRC_MSK6LEN,
MRTF_RP, PIM_ACTION_PRUNE);
}
else
{
/* RPbit cleared */
if (IF_ISEMPTY(&mrtentry_ptr->joined_oifs))
{
/* TODO: XXX: TIMER implem. dependency! */
if ((mrtentry_ptr->incoming == mifi)
&& (mrtentry_ptr->jp_timer <= timer_interval))
add_jp_entry(mrtentry_ptr->upstream, holdtime,
&grpentry_ptr->group, SINGLE_GRP_MSK6LEN,
&mrtentry_ptr->source->address,
SINGLE_SRC_MSK6LEN, 0, PIM_ACTION_PRUNE);
}
else
{
/* TODO: XXX: TIMER implem. dependency! */
if ((mrtentry_ptr->incoming == mifi)
&& (mrtentry_ptr->jp_timer <= timer_interval))
add_jp_entry(mrtentry_ptr->upstream, holdtime,
&grpentry_ptr->group, SINGLE_GRP_MSK6LEN,
&mrtentry_ptr->source->address,
SINGLE_SRC_MSK6LEN, 0, PIM_ACTION_JOIN);
}
/* TODO: XXX: TIMER implem. dependency! */
if ((mrtentry_ptr->flags & MRTF_SPT)
&& (grpentry_ptr->grp_route != (mrtentry_t *) NULL)
&& (mrtentry_ptr->incoming !=
grpentry_ptr->grp_route->incoming)
&& (grpentry_ptr->grp_route->incoming == mifi)
&& (grpentry_ptr->grp_route->jp_timer
<= timer_interval))
add_jp_entry(grpentry_ptr->grp_route->upstream, holdtime,
&grpentry_ptr->group, SINGLE_GRP_MSK6LEN,
&mrtentry_ptr->source->address,
SINGLE_SRC_MSK6LEN, MRTF_RP,
PIM_ACTION_PRUNE);
}
}
}
/* Check the (*,*,RP) entries */
for (cand_rp_ptr = cand_rp_list; cand_rp_ptr != (cand_rp_t *) NULL;
cand_rp_ptr = cand_rp_ptr->next)
{
rpentry_ptr = cand_rp_ptr->rpentry;
/* If join/prune to a particular neighbor only was specified */
if ((pim_nbr != (pim_nbr_entry_t *) NULL)
&& (rpentry_ptr->upstream != pim_nbr))
continue;
/* TODO: XXX: TIMER implem. dependency! */
if ((rpentry_ptr->mrtlink != (mrtentry_t *) NULL)
&& (rpentry_ptr->incoming == mifi)
&& (rpentry_ptr->mrtlink->jp_timer <= timer_interval))
{
add_jp_entry(rpentry_ptr->upstream, holdtime,
&sockaddr6_d, STAR_STAR_RP_MSK6LEN,
&rpentry_ptr->address,
SINGLE_SRC_MSK6LEN, MRTF_RP | MRTF_WC,
PIM_ACTION_JOIN);
}
}
/* Send all pending Join/Prune messages */
for (pim_nbr_ptr = v->uv_pim_neighbors;
pim_nbr_ptr != (pim_nbr_entry_t *) NULL;
pim_nbr_ptr = pim_nbr->next)
{
/* If join/prune to a particular neighbor only was specified */
if ((pim_nbr != (pim_nbr_entry_t *) NULL)
&& (pim_nbr_ptr != pim_nbr))
continue;
pack_and_send_jp6_message(pim_nbr_ptr);
}
return (TRUE);
}
int
add_jp_entry(pim_nbr, holdtime, group, grp_msklen, source, src_msklen,
addr_flags, join_prune)
pim_nbr_entry_t *pim_nbr;
u_int16 holdtime;
struct sockaddr_in6 *group;
u_int8 grp_msklen;
struct sockaddr_in6 *source;
u_int8 src_msklen;
u_int16 addr_flags;
u_int8 join_prune;
{
build_jp_message_t *bjpm;
u_int8 *data_ptr;
u_int8 flags = 0;
int rp_flag;
bjpm = pim_nbr->build_jp_message;
if (bjpm != (build_jp_message_t *) NULL)
{
if ((bjpm->jp_message_size + bjpm->join_list_size +
bjpm->prune_list_size + bjpm->rp_list_join_size +
bjpm->rp_list_prune_size >= MAX_JP_MESSAGE_SIZE)
|| (bjpm->join_list_size >= MAX_JOIN_LIST_SIZE)
|| (bjpm->prune_list_size >= MAX_PRUNE_LIST_SIZE)
|| (bjpm->rp_list_join_size >= MAX_JOIN_LIST_SIZE)
|| (bjpm->rp_list_prune_size >= MAX_PRUNE_LIST_SIZE))
{
/*
* TODO: XXX: BUG: If the list is getting too large, must be
* careful with the fragmentation.
*/
pack_and_send_jp6_message(pim_nbr);
bjpm = pim_nbr->build_jp_message; /* The buffer will be freed */
}
}
if (bjpm != (build_jp_message_t *) NULL)
{
if ((!inet6_equal(&bjpm->curr_group, group)
|| (bjpm->curr_group_msklen != grp_msklen)
|| (bjpm->holdtime != holdtime)))
{
pack_jp6_message(pim_nbr);
}
}
if (bjpm == (build_jp_message_t *) NULL)
{
bjpm = get_jp6_working_buff();
pim_nbr->build_jp_message = bjpm;
data_ptr = bjpm->jp_message;
PUT_EUADDR6(pim_nbr->address.sin6_addr, data_ptr);
PUT_BYTE(0, data_ptr); /* Reserved */
bjpm->num_groups_ptr = data_ptr++; /* The pointer for numgroups */
*(bjpm->num_groups_ptr) = 0; /* Zero groups */
PUT_HOSTSHORT(holdtime, data_ptr);
bjpm->holdtime = holdtime;
bjpm->jp_message_size = data_ptr - bjpm->jp_message;
}
/* TODO: move somewhere else, only when it is a new group */
bjpm->curr_group = *group;
bjpm->curr_group_msklen = grp_msklen;
if (inet6_equal(group, &sockaddr6_d) &&
(grp_msklen == STAR_STAR_RP_MSK6LEN))
rp_flag = TRUE;
else
rp_flag = FALSE;
switch (join_prune)
{
case PIM_ACTION_JOIN:
if (rp_flag == TRUE)
data_ptr = bjpm->rp_list_join + bjpm->rp_list_join_size;
else
data_ptr = bjpm->join_list + bjpm->join_list_size;
break;
case PIM_ACTION_PRUNE:
if (rp_flag == TRUE)
data_ptr = bjpm->rp_list_join + bjpm->rp_list_join_size;
else
data_ptr = bjpm->prune_list + bjpm->prune_list_size;
break;
default:
return (FALSE);
}
flags |= USADDR_S_BIT; /* Mandatory for PIMv2 */
if (addr_flags & MRTF_RP)
flags |= USADDR_RP_BIT;
if (addr_flags & MRTF_WC)
flags |= USADDR_WC_BIT;
PUT_ESADDR6(source->sin6_addr, src_msklen, flags, data_ptr);
switch (join_prune)
{
case PIM_ACTION_JOIN:
if (rp_flag == TRUE)
{
bjpm->rp_list_join_size = data_ptr - bjpm->rp_list_join;
bjpm->rp_list_join_number++;
}
else
{
bjpm->join_list_size = data_ptr - bjpm->join_list;
bjpm->join_addr_number++;
}
break;
case PIM_ACTION_PRUNE:
if (rp_flag == TRUE)
{
bjpm->rp_list_prune_size = data_ptr - bjpm->rp_list_prune;
bjpm->rp_list_prune_number++;
}
else
{
bjpm->prune_list_size = data_ptr - bjpm->prune_list;
bjpm->prune_addr_number++;
}
break;
default:
return (FALSE);
}
return (TRUE);
}
/* TODO: check again the size of the buffers */
static build_jp_message_t *
get_jp6_working_buff()
{
build_jp_message_t *bjpm_ptr;
if (build_jp_message_pool_counter == 0)
{
bjpm_ptr = (build_jp_message_t *) malloc(sizeof(build_jp_message_t));
bjpm_ptr->next = (build_jp_message_t *) NULL;
bjpm_ptr->jp_message =
(u_int8 *) malloc(MAX_JP_MESSAGE_SIZE +
sizeof(pim_jp_encod_grp_t) +
2 * sizeof(pim6_encod_src_addr_t));
bjpm_ptr->jp_message_size = 0;
bjpm_ptr->join_list_size = 0;
bjpm_ptr->join_addr_number = 0;
bjpm_ptr->join_list = (u_int8 *) malloc(MAX_JOIN_LIST_SIZE +
sizeof(pim6_encod_src_addr_t));
bjpm_ptr->prune_list_size = 0;
bjpm_ptr->prune_addr_number = 0;
bjpm_ptr->prune_list = (u_int8 *) malloc(MAX_PRUNE_LIST_SIZE +
sizeof(pim6_encod_src_addr_t));
bjpm_ptr->rp_list_join_size = 0;
bjpm_ptr->rp_list_join_number = 0;
bjpm_ptr->rp_list_join = (u_int8 *) malloc(MAX_JOIN_LIST_SIZE +
sizeof(pim6_encod_src_addr_t));
bjpm_ptr->rp_list_prune_size = 0;
bjpm_ptr->rp_list_prune_number = 0;
bjpm_ptr->rp_list_prune = (u_int8 *) malloc(MAX_PRUNE_LIST_SIZE +
sizeof(pim6_encod_src_addr_t));
bjpm_ptr->curr_group = sockaddr6_any;
bjpm_ptr->curr_group_msklen = 0;
bjpm_ptr->holdtime = 0;
return bjpm_ptr;
}
else
{
bjpm_ptr = build_jp_message_pool;
build_jp_message_pool = build_jp_message_pool->next;
build_jp_message_pool_counter--;
bjpm_ptr->jp_message_size = 0;
bjpm_ptr->join_list_size = 0;
bjpm_ptr->join_addr_number = 0;
bjpm_ptr->prune_list_size = 0;
bjpm_ptr->prune_addr_number = 0;
bjpm_ptr->curr_group = sockaddr6_any;
bjpm_ptr->curr_group_msklen = 0;
return (bjpm_ptr);
}
}
static void
return_jp6_working_buff(pim_nbr)
pim_nbr_entry_t *pim_nbr;
{
build_jp_message_t *bjpm_ptr = pim_nbr->build_jp_message;
if (bjpm_ptr == (build_jp_message_t *) NULL)
return;
/* Don't waste memory by keeping too many free buffers */
/* TODO: check/modify the definitions for POOL_NUMBER and size */
if (build_jp_message_pool_counter >= MAX_JP_MESSAGE_POOL_NUMBER)
{
free((void *) bjpm_ptr->jp_message);
free((void *) bjpm_ptr->join_list);
free((void *) bjpm_ptr->prune_list);
free((void *) bjpm_ptr->rp_list_join);
free((void *) bjpm_ptr->rp_list_prune);
free((void *) bjpm_ptr);
}
else
{
bjpm_ptr->next = build_jp_message_pool;
build_jp_message_pool = bjpm_ptr;
build_jp_message_pool_counter++;
}
pim_nbr->build_jp_message = (build_jp_message_t *) NULL;
}
/*
* TODO: XXX: Currently, the (*,*,RP) stuff goes at the end of the Join/Prune
* message. However, this particular implementation of PIM processes the
* Join/Prune messages faster if (*,*,RP) is at the beginning. Modify some of
* the functions below such that the outgoing messages place (*,*,RP) at the
* beginning, not at the end.
*/
static void
pack_jp6_message(pim_nbr)
pim_nbr_entry_t *pim_nbr;
{
build_jp_message_t *bjpm;
u_int8 *data_ptr;
bjpm = pim_nbr->build_jp_message;
if ((bjpm == (build_jp_message_t *) NULL)
|| (inet6_equal(&bjpm->curr_group,&sockaddr6_any)))
return;
data_ptr = bjpm->jp_message + bjpm->jp_message_size;
PUT_EGADDR6(bjpm->curr_group.sin6_addr, bjpm->curr_group_msklen, 0, data_ptr);
PUT_HOSTSHORT(bjpm->join_addr_number, data_ptr);
PUT_HOSTSHORT(bjpm->prune_addr_number, data_ptr);
bcopy(bjpm->join_list, data_ptr, bjpm->join_list_size);
data_ptr += bjpm->join_list_size;
bcopy(bjpm->prune_list, data_ptr, bjpm->prune_list_size);
data_ptr += bjpm->prune_list_size;
bjpm->jp_message_size = (data_ptr - bjpm->jp_message);
bjpm->join_list_size = 0;
bjpm->join_addr_number = 0;
#if 0 /* isn't this necessary? */
bjpm->rp_list_join_size = 0;
bjpm->rp_list_join_number = 0;
#endif
bjpm->prune_list_size = 0;
bjpm->prune_addr_number = 0;
#if 0 /* isn't this necessary? */
bjpm->rp_list_prune_size = 0;
bjpm->rp_list_prune_number = 0;
#endif
(*bjpm->num_groups_ptr)++;
bjpm->curr_group = sockaddr6_any;
bjpm->curr_group_msklen = 0;
if (*bjpm->num_groups_ptr == ((u_int8) ~ 0 - 1))
{
if (bjpm->rp_list_join_number + bjpm->rp_list_prune_number)
{
/* Add the (*,*,RP) at the end */
data_ptr = bjpm->jp_message + bjpm->jp_message_size;
PUT_EGADDR6(sockaddr6_d.sin6_addr, STAR_STAR_RP_MSK6LEN, 0, data_ptr);
PUT_HOSTSHORT(bjpm->rp_list_join_number, data_ptr);
PUT_HOSTSHORT(bjpm->rp_list_prune_number, data_ptr);
bcopy(bjpm->rp_list_join, data_ptr, bjpm->rp_list_join_size);
data_ptr += bjpm->rp_list_join_size;
bcopy(bjpm->rp_list_prune, data_ptr, bjpm->rp_list_prune_size);
data_ptr += bjpm->rp_list_prune_size;
bjpm->jp_message_size = (data_ptr - bjpm->jp_message);
bjpm->rp_list_join_size = 0;
bjpm->rp_list_join_number = 0;
bjpm->rp_list_prune_size = 0;
bjpm->rp_list_prune_number = 0;
(*bjpm->num_groups_ptr)++;
}
send_jp6_message(pim_nbr);
}
}
void
pack_and_send_jp6_message(pim_nbr)
pim_nbr_entry_t *pim_nbr;
{
u_int8 *data_ptr;
build_jp_message_t *bjpm;
if ((pim_nbr == (pim_nbr_entry_t *) NULL)
|| ((bjpm = pim_nbr->build_jp_message) == (build_jp_message_t *) NULL))
{
return;
}
pack_jp6_message(pim_nbr);
if (bjpm->rp_list_join_number + bjpm->rp_list_prune_number)
{
/* Add the (*,*,RP) at the end */
data_ptr = bjpm->jp_message + bjpm->jp_message_size;
PUT_EGADDR6(sockaddr6_d.sin6_addr, STAR_STAR_RP_MSK6LEN, 0, data_ptr);
PUT_HOSTSHORT(bjpm->rp_list_join_number, data_ptr);
PUT_HOSTSHORT(bjpm->rp_list_prune_number, data_ptr);
bcopy(bjpm->rp_list_join, data_ptr, bjpm->rp_list_join_size);
data_ptr += bjpm->rp_list_join_size;
bcopy(bjpm->rp_list_prune, data_ptr, bjpm->rp_list_prune_size);
data_ptr += bjpm->rp_list_prune_size;
bjpm->jp_message_size = (data_ptr - bjpm->jp_message);
bjpm->rp_list_join_size = 0;
bjpm->rp_list_join_number = 0;
bjpm->rp_list_prune_size = 0;
bjpm->rp_list_prune_number = 0;
(*bjpm->num_groups_ptr)++;
}
send_jp6_message(pim_nbr);
}
static void
send_jp6_message(pim_nbr)
pim_nbr_entry_t *pim_nbr;
{
u_int16 datalen;
mifi_t mifi;
datalen = pim_nbr->build_jp_message->jp_message_size;
mifi = pim_nbr->vifi;
bcopy(pim_nbr->build_jp_message->jp_message,
pim6_send_buf+sizeof(struct pim), datalen);
send_pim6(pim6_send_buf, &uvifs[mifi].uv_linklocal->pa_addr,
&allpim6routers_group , PIM_JOIN_PRUNE, datalen);
uvifs[mifi].uv_out_pim6_join_prune++;
return_jp6_working_buff(pim_nbr);
}
/************************************************************************
* PIM_ASSERT
************************************************************************/
int
receive_pim6_assert(src, dst, pim_message, datalen)
struct sockaddr_in6 *src,
*dst;
register char *pim_message;
int datalen;
{
mifi_t mifi;
pim6_encod_uni_addr_t eusaddr;
pim6_encod_grp_addr_t egaddr;
struct sockaddr_in6 source,
group;
mrtentry_t *mrtentry_ptr,
*mrtentry_ptr2;
u_int8 *data_ptr;
struct uvif *v;
u_int32 assert_preference;
u_int32 assert_metric;
u_int32 assert_rptbit;
u_int32 local_metric;
u_int32 local_preference;
u_int8 local_rptbit;
u_int8 local_wins;
pim_nbr_entry_t *original_upstream_router;
if ((mifi = find_vif_direct(src)) == NO_VIF)
{
/*
* Either a local vif or somehow received PIM_ASSERT from
* non-directly connected router. Ignore it.
*/
if (local_address(src) == NO_VIF)
log(LOG_INFO, 0,
"Ignoring PIM_ASSERT from non-neighbor router %s",
inet6_fmt(&src->sin6_addr));
return (FALSE);
}
v = &uvifs[mifi];
v->uv_in_pim6_assert++;
if (uvifs[mifi].uv_flags &
(VIFF_DOWN | VIFF_DISABLED | VIFF_NONBRS | MIFF_REGISTER))
return (FALSE); /* Shoudn't come on this interface */
data_ptr = (u_int8 *) (pim_message + sizeof(struct pim));
/* Get the group and source addresses */
GET_EGADDR6(&egaddr, data_ptr);
GET_EUADDR6(&eusaddr, data_ptr);
/* Get the metric related info */
GET_HOSTLONG(assert_preference, data_ptr);
GET_HOSTLONG(assert_metric, data_ptr);
assert_rptbit = assert_preference & PIM_ASSERT_RPT_BIT;
source.sin6_addr = eusaddr.unicast_addr;
source.sin6_scope_id = inet6_uvif2scopeid(&source, v);
group.sin6_addr = egaddr.mcast_addr;
group.sin6_scope_id = inet6_uvif2scopeid(&group, v);
/* Find the longest "active" entry, i.e. the one with a kernel mirror */
if (assert_rptbit)
{
mrtentry_ptr = find_route(NULL, &group,
MRTF_WC | MRTF_PMBR, DONT_CREATE);
if (mrtentry_ptr != (mrtentry_t *) NULL)
if (!(mrtentry_ptr->flags & MRTF_KERNEL_CACHE))
if (mrtentry_ptr->flags & MRTF_WC)
{
mrtentry_ptr =
mrtentry_ptr->group->active_rp_grp->rp->rpentry->mrtlink;
}
}
else
{
mrtentry_ptr = find_route(&source, &group,
MRTF_SG | MRTF_WC | MRTF_PMBR, DONT_CREATE);
if ((mrtentry_ptr != (mrtentry_t *) NULL))
if (!(mrtentry_ptr->flags & MRTF_KERNEL_CACHE))
{
if (mrtentry_ptr->flags & MRTF_SG)
{
mrtentry_ptr2 = mrtentry_ptr->group->grp_route;
if ((mrtentry_ptr2 != (mrtentry_t *) NULL)
&& (mrtentry_ptr2->flags & MRTF_KERNEL_CACHE))
mrtentry_ptr = mrtentry_ptr2;
else
mrtentry_ptr = mrtentry_ptr->group->active_rp_grp->rp->rpentry->mrtlink;
}
else
if (mrtentry_ptr->flags & MRTF_WC)
mrtentry_ptr = mrtentry_ptr->group->active_rp_grp->rp->rpentry->mrtlink;
}
}
if ((mrtentry_ptr == (mrtentry_t *) NULL)
|| (!(mrtentry_ptr->flags & MRTF_KERNEL_CACHE)))
/* No routing entry or not "active" entry. Ignore the assert */
return (FALSE);
/* Prepare the local preference and metric */
if ((mrtentry_ptr->flags & MRTF_PMBR)
|| ((mrtentry_ptr->flags & MRTF_SG)
&& (!(mrtentry_ptr->flags & MRTF_RP))))
{
/* Either (S,G) (toward S) or (*,*,RP). */
/* TODO: XXX: get the info from mrtentry, or source or from kernel ? */
/*
* local_metric = mrtentry_ptr->source->metric; local_preference =
* mrtentry_ptr->source->preference;
*/
local_metric = mrtentry_ptr->metric;
local_preference = mrtentry_ptr->preference;
}
else
{
/*
* Should be (*,G) or (S,G)RPbit entry. Get what we need from the RP
* info.
*/
/* TODO: get the info from mrtentry, RP-entry or kernel? */
/*
* local_metric =
* mrtentry_ptr->group->active_rp_grp->rp->rpentry->metric;
* local_preference =
* mrtentry_ptr->group->active_rp_grp->rp->rpentry->preference;
*/
local_metric = mrtentry_ptr->metric;
local_preference = mrtentry_ptr->preference;
}
local_rptbit = (mrtentry_ptr->flags & MRTF_RP);
if (local_rptbit)
/* Make the RPT bit the most significant one */
local_preference |= PIM_ASSERT_RPT_BIT;
if (IF_ISSET(mifi, &mrtentry_ptr->oifs))
{
/* The ASSERT has arrived on oif */
/*
* TODO: XXX: here the processing order is different from the spec.
* The spec requires first eventually to create a routing entry (see
* 3.5.2.1(1) and then compare the metrics. Here we compare first the
* metrics with the existing longest match entry and if we lose then
* create a new entry and compare again. This saves us the
* unnecessary creating of a routing entry if we anyway are going to
* lose: for example the local (*,*,RP) vs the remote (*,*,RP) or
* (*,G)
*/
local_wins = compare_metrics(local_preference, local_metric,
&v->uv_linklocal->pa_addr, assert_preference,
assert_metric, src);
if (local_wins == TRUE)
{
/* TODO: verify the parameters */
send_pim6_assert(&source, &group, mifi, mrtentry_ptr);
return (TRUE);
}
/* Create a "better" routing entry and try again */
if ((assert_rptbit) && (mrtentry_ptr->flags & MRTF_PMBR))
{
/* The matching entry was (*,*,RP). Create (*,G) */
mrtentry_ptr2 = find_route(NULL, &group, MRTF_WC, CREATE);
}
else
if ((!assert_rptbit) &&
(mrtentry_ptr->flags & (MRTF_WC | MRTF_PMBR)))
{
/* create (S,G) */
mrtentry_ptr2 = find_route(&source, &group, MRTF_SG, CREATE);
}
else
{
/* We have no chance to win. Give up and prune the oif */
mrtentry_ptr2 = (mrtentry_t *) NULL;
}
if (mrtentry_ptr2 != (mrtentry_t *) NULL)
{
mrtentry_ptr2->flags &= ~MRTF_NEW;
/*
* TODO: XXX: The spec doesn't say what entry timer value to use
* when the routing entry is created because of asserts.
*/
SET_TIMER(mrtentry_ptr2->timer, pim_data_timeout);
if (mrtentry_ptr2->flags & MRTF_RP)
{
/*
* Either (*,G) or (S,G)RPbit entry. Get what we need from
* the RP info.
*/
/* TODO: where to get the metric+preference from? */
/*
* local_metric =
* mrtentry_ptr->group->active_rp_grp->rp->rpentry->metric;
* local_preference =
* mrtentry_ptr->group->active_rp_grp->rp->rpentry->preference
* ;
*/
local_metric = mrtentry_ptr->metric;
local_preference = mrtentry_ptr->preference;
local_preference |= PIM_ASSERT_RPT_BIT;
}
else
{
/* (S,G) toward the source */
/* TODO: where to get the metric from ? */
/*
* local_metric = mrtentry_ptr->source->metric;
* local_preference = mrtentry_ptr->source->preference;
*/
local_metric = mrtentry_ptr->metric;
local_preference = mrtentry_ptr->preference;
}
local_wins = compare_metrics(local_preference, local_metric,
&v->uv_linklocal->pa_addr, assert_preference,
assert_metric, src);
if (local_wins == TRUE)
{
/* TODO: verify the parameters */
send_pim6_assert(&source, &group, mifi, mrtentry_ptr);
return (TRUE);
}
/* We lost, but have created the entry which has to be pruned */
mrtentry_ptr = mrtentry_ptr2;
}
/* Have to remove that outgoing vifi from mrtentry_ptr */
IF_SET(mifi, &mrtentry_ptr->asserted_oifs);
/* TODO: XXX: TIMER implem. dependency! */
if (mrtentry_ptr->timer < pim_assert_timeout)
SET_TIMER(mrtentry_ptr->timer, pim_assert_timeout);
/*
* TODO: XXX: check that the timer of all affected routing entries
* has been restarted.
*/
change_interfaces(mrtentry_ptr,
mrtentry_ptr->incoming,
&mrtentry_ptr->joined_oifs,
&mrtentry_ptr->pruned_oifs,
&mrtentry_ptr->leaves,
&mrtentry_ptr->asserted_oifs, 0);
return (FALSE); /* Doesn't matter the return value */
} /* End of assert received on oif */
if (mrtentry_ptr->incoming == mifi)
{
/* Assert received on iif */
if (assert_rptbit)
{
if (!(mrtentry_ptr->flags & MRTF_RP))
return (TRUE); /* The locally used upstream router will win
* the assert, so don't change it. */
}
/*
* TODO: where to get the local metric and preference from? system
* call or mrtentry is fine?
*/
local_metric = mrtentry_ptr->metric;
local_preference = mrtentry_ptr->preference;
if (mrtentry_ptr->flags & MRTF_RP)
local_preference |= PIM_ASSERT_RPT_BIT;
local_wins = compare_metrics(local_preference, local_metric,
&mrtentry_ptr->upstream->address,
assert_preference, assert_metric, src);
if (local_wins == TRUE)
return (TRUE); /* return whatever */
/* The upstream must be changed to the winner */
mrtentry_ptr->preference = assert_preference;
mrtentry_ptr->metric = assert_metric;
mrtentry_ptr->upstream = find_pim6_nbr(src);
/* Check if the upstream router is different from the original one */
if (mrtentry_ptr->flags & MRTF_PMBR)
original_upstream_router = mrtentry_ptr->source->upstream;
else
if (mrtentry_ptr->flags & MRTF_RP)
original_upstream_router =
mrtentry_ptr->group->active_rp_grp->rp->rpentry->upstream;
else
original_upstream_router = mrtentry_ptr->source->upstream;
if (mrtentry_ptr->upstream != original_upstream_router)
{
mrtentry_ptr->flags |= MRTF_ASSERTED;
SET_TIMER(mrtentry_ptr->assert_timer, pim_assert_timeout);
}
else
mrtentry_ptr->flags &= ~MRTF_ASSERTED;
}
return (TRUE);
}
int
send_pim6_assert(source, group, mifi, mrtentry_ptr)
struct sockaddr_in6 *source;
struct sockaddr_in6 *group;
mifi_t mifi;
mrtentry_t *mrtentry_ptr;
{
u_int8 *data_ptr;
u_int8 *data_start_ptr;
u_int32 local_preference;
u_int32 local_metric;
srcentry_t *srcentry_ptr;
/* Don't send assert if the outgoing interface a tunnel or register vif */
if (uvifs[mifi].uv_flags & (MIFF_REGISTER | VIFF_TUNNEL))
return (FALSE);
data_ptr = (u_int8 *) (pim6_send_buf + sizeof(struct pim));
data_start_ptr = data_ptr;
PUT_EGADDR6(group->sin6_addr, SINGLE_GRP_MSK6LEN, 0, data_ptr);
PUT_EUADDR6(source->sin6_addr, data_ptr);
/*
* TODO: XXX: where to get the metric from: srcentry_ptr or mrtentry_ptr
* or from the kernel?
*/
if (mrtentry_ptr->flags & MRTF_PMBR)
{
/* (*,*,RP) */
srcentry_ptr = mrtentry_ptr->source;
/*
* TODO: set_incoming(srcentry_ptr, PIM_IIF_RP);
*/
}
else
if (mrtentry_ptr->flags & MRTF_RP)
{
/* (*,G) or (S,G)RPbit (iif toward RP) */
srcentry_ptr = mrtentry_ptr->group->active_rp_grp->rp->rpentry;
/*
* TODO: set_incoming(srcentry_ptr, PIM_IIF_RP);
*/
}
else
{
/* (S,G) toward S */
srcentry_ptr = mrtentry_ptr->source;
/*
* TODO: set_incoming(srcentry_ptr, PIM_IIF_SOURCE);
*/
}
/*
* TODO: check again! local_metric = srcentry_ptr->metric;
* local_preference = srcentry_ptr->preference;
*/
local_metric = mrtentry_ptr->metric;
local_preference = mrtentry_ptr->preference;
if (mrtentry_ptr->flags & MRTF_RP)
local_preference |= PIM_ASSERT_RPT_BIT;
PUT_HOSTLONG(local_preference, data_ptr);
PUT_HOSTLONG(local_metric, data_ptr);
send_pim6(pim6_send_buf, &uvifs[mifi].uv_linklocal->pa_addr,
&allpim6routers_group, PIM_ASSERT,
data_ptr - data_start_ptr);
uvifs[mifi].uv_out_pim6_assert++;
return (TRUE);
}
/* Return TRUE if the local win, otherwise FALSE */
static int
compare_metrics(local_preference, local_metric, local_address,
remote_preference, remote_metric, remote_address)
u_int32 local_preference;
u_int32 local_metric;
struct sockaddr_in6 *local_address;
u_int32 remote_preference;
u_int32 remote_metric;
struct sockaddr_in6 *remote_address;
{
/* Now lets see who has a smaller gun (aka "asserts war") */
/*
* FYI, the smaller gun...err metric wins, but if the same caliber, then
* the bigger network address wins. The order of threatment is:
* preference, metric, address.
*/
/*
* The RPT bits are already included as the most significant bits of the
* preferences.
*/
if (remote_preference > local_preference)
return TRUE;
if (remote_preference < local_preference)
return FALSE;
if (remote_metric > local_metric)
return TRUE;
if (remote_metric < local_metric)
return FALSE;
if (inet6_greaterthan(local_address, remote_address))
return TRUE;
return FALSE;
}
/************************************************************************
* PIM_BOOTSTRAP
************************************************************************/
#define PIM6_BOOTSTRAP_MINLEN (PIM_MINLEN + PIM6_ENCODE_UNI_ADDR_LEN)
int
receive_pim6_bootstrap(src, dst, pim_message, datalen)
struct sockaddr_in6 *src,
*dst;
char *pim_message;
int datalen;
{
u_int8 *data_ptr;
u_int8 *max_data_ptr;
u_int16 new_bsr_fragment_tag;
u_int8 new_bsr_hash_masklen;
u_int8 new_bsr_priority;
pim6_encod_uni_addr_t new_bsr_uni_addr;
struct sockaddr_in6 new_bsr_address;
struct rpfctl rpfc;
pim_nbr_entry_t *n,
*rpf_neighbor;
struct sockaddr_in6 neighbor_addr;
mifi_t mifi,
incoming = NO_VIF;
int min_datalen;
pim6_encod_grp_addr_t curr_group_addr;
pim6_encod_uni_addr_t curr_rp_addr;
u_int8 curr_rp_count;
u_int8 curr_frag_rp_count;
u_int16 reserved_short;
u_int16 curr_rp_holdtime;
u_int8 curr_rp_priority;
u_int8 reserved_byte;
struct in6_addr curr_group_mask;
grp_mask_t *grp_mask_ptr;
grp_mask_t *grp_mask_next;
rp_grp_entry_t *grp_rp_entry_ptr;
rp_grp_entry_t *grp_rp_entry_next;
struct sockaddr_in6 prefix_h,
prefix_h2,
group_,
rpp_;
int i;
struct uvif *v;
if ((mifi=find_vif_direct(src)) == NO_VIF)
{
/*
* Either a local vif or somehow received PIM_BOOTSTRAP from
* non-directly connected router. Ignore it.
*/
if (local_address(src) == NO_VIF)
log(LOG_INFO, 0,
"Ignoring PIM_BOOTSTRAP from non-neighbor router %s",
inet6_fmt(&src->sin6_addr));
return (FALSE);
}
/* sanity check for the minimum length */
if (datalen < PIM6_BOOTSTRAP_MINLEN) {
log(LOG_NOTICE, 0,
"receive_pim6_bootstrap: Bootstrap message size(%u) is"
" too short from %s",
datalen, inet6_fmt(&src->sin6_addr));
return(FALSE);
}
v = &uvifs[mifi];
v->uv_in_pim6_bootsrap++;
data_ptr = (u_int8 *) (pim_message + sizeof(struct pim));
/* Parse the PIM_BOOTSTRAP message */
GET_HOSTSHORT(new_bsr_fragment_tag, data_ptr);
GET_BYTE(new_bsr_hash_masklen, data_ptr);
GET_BYTE(new_bsr_priority, data_ptr);
GET_EUADDR6(&new_bsr_uni_addr, data_ptr);
/*
* BSR address must be a global unicast address.
* [draft-ietf-pim-ipv6-01.txt sec 4.5]
*/
if (IN6_IS_ADDR_MULTICAST(&new_bsr_uni_addr.unicast_addr) ||
IN6_IS_ADDR_LINKLOCAL(&new_bsr_uni_addr.unicast_addr) ||
IN6_IS_ADDR_SITELOCAL(&new_bsr_uni_addr.unicast_addr)) {
log(LOG_WARNING, 0,
"receive_pim6_bootstrap: invalid BSR address: %s",
inet6_fmt(&new_bsr_uni_addr.unicast_addr));
return(FALSE);
}
new_bsr_address.sin6_addr = new_bsr_uni_addr.unicast_addr;
new_bsr_address.sin6_len = sizeof(new_bsr_address);
new_bsr_address.sin6_family = AF_INET6;
new_bsr_address.sin6_scope_id = inet6_uvif2scopeid(&new_bsr_address, v);
if (local_address(&new_bsr_address) != NO_VIF)
{
IF_DEBUG(DEBUG_RPF | DEBUG_PIM_BOOTSTRAP)
log(LOG_DEBUG, 0,
"receive_pim6_bootstrap: Bootstrap from myself(%s), ignored.",
inet6_fmt(&new_bsr_address.sin6_addr));
return (FALSE); /* The new BSR is one of my local addresses */
}
/*
* Compare the current BSR priority with the priority of the BSR included
* in the message.
*/
/*
* TODO: if I am just starting and will become the BSR, I should accept
* the message coming from the current BSR and get the current
* Cand-RP-Set.
*/
if ((curr_bsr_priority > new_bsr_priority) ||
((curr_bsr_priority == new_bsr_priority)
&& (inet6_greaterthan(&curr_bsr_address, &new_bsr_address))))
{
/* The message's BSR is less preferred than the current BSR */
log(LOG_DEBUG, 0,
"receive_pim6_bootstrap: BSR(%s, prio=%d) is less preferred"
" than the current BSR(%s, prio=%d)",
inet6_fmt(&new_bsr_address.sin6_addr), new_bsr_priority,
inet6_fmt(&curr_bsr_address.sin6_addr), curr_bsr_priority);
return (FALSE); /* Ignore the received BSR message */
}
/* Check the iif, if this was PIM-ROUTERS multicast */
if (IN6_ARE_ADDR_EQUAL(&dst->sin6_addr, &allpim6routers_group.sin6_addr))
{
k_req_incoming(&new_bsr_address, &rpfc);
if ((rpfc.iif == NO_VIF) ||
IN6_IS_ADDR_UNSPECIFIED(&rpfc.rpfneighbor.sin6_addr))
{
/* coudn't find a route to the BSR */
log(LOG_NOTICE, 0,
"receive_pim6_bootstrap: can't find a route to the BSR(%s)",
inet6_fmt(&new_bsr_address.sin6_addr));
return (FALSE);
}
neighbor_addr = *src;
incoming = rpfc.iif;
if (uvifs[incoming].uv_flags &
(VIFF_DISABLED | VIFF_DOWN | MIFF_REGISTER))
{
log(LOG_NOTICE, 0,
"receive_pim6_bootstrap: Bootstrap from an invalid interface(%s)",
uvifs[incoming].uv_name);
return (FALSE); /* Shoudn't arrive on that interface */
}
/* Find the upstream router */
for (n = uvifs[incoming].uv_pim_neighbors; n != NULL; n = n->next)
{
if (inet6_lessthan(&neighbor_addr, &n->address))
continue;
if (inet6_equal(&neighbor_addr, &n->address))
{
rpf_neighbor = n;
break;
}
log(LOG_NOTICE, 0,
"receive_pim6_bootstrap: Bootstrap from an unrecognized "
"neighbor(%s) on %s",
inet6_fmt(&neighbor_addr.sin6_addr), uvifs[incoming].uv_name);
return (FALSE); /* No neighbor toward BSR found */
}
/* redundant checks? */
if ((n == (pim_nbr_entry_t *) NULL ))
{
return (FALSE); /* Sender of this message is not the RPF*/
}
/* neighbor */
if(!(inet6_equal(&n->address, src)))
{
return (FALSE);
}
}
else
{
if (local_address(dst) == NO_VIF)
/*
* TODO: XXX: this situation should be handled earlier: The
* destination is neither ALL_PIM_ROUTERS nor me
*/
log(LOG_NOTICE, 0,
"receive_pim6_bootstrap: Bootstrap with an invalid dst(%s)",
inet6_fmt(&dst->sin6_addr));
return (FALSE);
/* Probably unicasted from the current DR */
if (cand_rp_list != (cand_rp_t *) NULL)
{
/*
* Hmmm, I do have a Cand-RP-list, but some neighbor has a
* different opinion and is unicasting it to me. Ignore this guy.
*/
log(LOG_INFO, 0,
"receive_pim6_bootstrap: Bootstrap received but we already "
"have RPs. ignored.");
return (FALSE);
}
for (mifi = 0; mifi < numvifs; mifi++)
{
if (uvifs[mifi].uv_flags & (VIFF_DISABLED | VIFF_DOWN |
MIFF_REGISTER))
continue;
if (inet6_equal(&uvifs[mifi].uv_linklocal->pa_addr,dst))
{
incoming = mifi;
break;
}
}
if (incoming == NO_VIF)
{
/* Cannot find the receiving iif toward that DR */
IF_DEBUG(DEBUG_RPF | DEBUG_PIM_BOOTSTRAP)
log(LOG_DEBUG, 0,
"Unicast boostrap message from %s to %s ignored: "
"cannot find iif",
inet6_fmt(&src->sin6_addr), inet6_fmt(&dst->sin6_addr));
return (FALSE);
}
/*
* TODO: check the sender is directly connected and I am really the
* DR.
*/
}
if (cand_rp_flag == TRUE)
{
/* If change in the BSR address, send immediately Cand-RP-Adv */
/* TODO: use some random delay? */
if (!inet6_equal(&new_bsr_address , &curr_bsr_address))
{
send_pim6_cand_rp_adv();
SET_TIMER(pim_cand_rp_adv_timer, my_cand_rp_adv_period);
}
}
/* Forward the BSR Message first and then update the RP-set list */
/* XXX: should we do sanity checks before forwarding?? */
/* TODO: if the message was unicasted to me, resend? */
for (mifi = 0; mifi < numvifs; mifi++)
{
if (mifi == incoming)
continue;
if (uvifs[mifi].uv_flags & (VIFF_DISABLED | VIFF_DOWN |
MIFF_REGISTER | VIFF_TUNNEL | VIFF_NONBRS))
continue;
bcopy(pim_message, (char *)(pim6_send_buf), datalen);
send_pim6(pim6_send_buf, &uvifs[mifi].uv_linklocal->pa_addr,
&allpim6routers_group, PIM_BOOTSTRAP,
datalen - sizeof(struct pim));
}
max_data_ptr = (u_int8 *) pim_message + datalen;
/*
* TODO: XXX: this 24 is HARDCODING!!! Do a bunch of definitions and make
* it stylish!
* 24 = Encoded-Group Address(20) + RP-cound(1) + Frag-RP(1) + Reserved(2)
*/
min_datalen = 24;
if ((new_bsr_fragment_tag != curr_bsr_fragment_tag) ||
(inet6_equal(&new_bsr_address, &curr_bsr_address)))
{
/* Throw away the old segment */
delete_rp_list(&segmented_cand_rp_list, &segmented_grp_mask_list);
}
curr_bsr_address = new_bsr_address;
curr_bsr_priority = new_bsr_priority;
curr_bsr_fragment_tag = new_bsr_fragment_tag;
MASKLEN_TO_MASK6(new_bsr_hash_masklen, curr_bsr_hash_mask);
SET_TIMER(pim_bootstrap_timer, PIM_BOOTSTRAP_TIMEOUT);
while (data_ptr + min_datalen <= max_data_ptr)
{
GET_EGADDR6(&curr_group_addr, data_ptr);
GET_BYTE(curr_rp_count, data_ptr);
GET_BYTE(curr_frag_rp_count, data_ptr);
GET_HOSTSHORT(reserved_short, data_ptr);
MASKLEN_TO_MASK6(curr_group_addr.masklen, curr_group_mask);
if (IN6_IS_ADDR_MC_NODELOCAL(&curr_group_addr.mcast_addr) ||
IN6_IS_ADDR_MC_LINKLOCAL(&curr_group_addr.mcast_addr)) {
log(LOG_WARNING, 0,
"receive_pim6_bootstrap: "
"group prefix has a narraw scope: %s (ignored)",
inet6_fmt(&curr_group_addr.mcast_addr));
continue;
}
if (curr_rp_count == 0)
{
group_.sin6_addr = curr_group_addr.mcast_addr;
delete_grp_mask(&cand_rp_list, &grp_mask_list,
&group_, curr_group_mask);
continue;
}
if (curr_rp_count == curr_frag_rp_count)
{
/* Add all RPs */
while (curr_frag_rp_count--)
{
/*
* Sanity for the data length; the data packet must contain
* Encoded-Unicast-RP-Address(18) + RP-Holdtime(2) +
* RP-Priority(1) + Reserved(1).
*/
if (data_ptr + PIM6_ENCODE_UNI_ADDR_LEN + sizeof(u_int32_t)
> max_data_ptr) {
log(LOG_NOTICE, 0,
"receive_pim6_bootstrap: Bootstrap from %s on %s "
"does not have enough length to contatin RP information",
inet6_fmt(&src->sin6_addr), v->uv_name);
/*
* Ignore the rest of the message.
* XXX: should we discard the entire message?
*/
goto garbage_collect;
}
GET_EUADDR6(&curr_rp_addr, data_ptr);
GET_HOSTSHORT(curr_rp_holdtime, data_ptr);
GET_BYTE(curr_rp_priority, data_ptr);
GET_BYTE(reserved_byte, data_ptr);
MASKLEN_TO_MASK6(curr_group_addr.masklen, curr_group_mask);
rpp_.sin6_addr = curr_rp_addr.unicast_addr;
rpp_.sin6_len = sizeof(rpp_);
rpp_.sin6_family = AF_INET6;
/*
* The cand_rp address scope should be global.
* XXX: however, is a site-local RP sometimes useful?
* we currently discard such RP...
*/
if (IN6_IS_ADDR_LINKLOCAL(&rpp_.sin6_addr) ||
IN6_IS_ADDR_SITELOCAL(&rpp_.sin6_addr)) {
log(LOG_WARNING, 0,
"receive_pim6_bootstrap: invalid RP address: %s",
inet6_fmt(&rpp_.sin6_addr));
continue;
}
rpp_.sin6_scope_id = 0;
group_.sin6_addr = curr_group_addr.mcast_addr;
group_.sin6_len = sizeof(group_);
group_.sin6_family = AF_INET6;
group_.sin6_scope_id = inet6_uvif2scopeid(&group_,v);
add_rp_grp_entry(&cand_rp_list, &grp_mask_list,
&rpp_, curr_rp_priority,
curr_rp_holdtime, &group_,
curr_group_mask,
curr_bsr_hash_mask,
curr_bsr_fragment_tag);
}
continue;
}
/*
* This is a partial list of the RPs for this group prefix. Save
* until all segments arrive.
*/
for (i = 0; i < sizeof(struct in6_addr); i++) {
prefix_h.sin6_addr.s6_addr[i] =
curr_group_addr.mcast_addr.s6_addr[i]
& curr_group_mask.s6_addr[i];
}
for (grp_mask_ptr = segmented_grp_mask_list;
grp_mask_ptr != (grp_mask_t *) NULL;
grp_mask_ptr = grp_mask_ptr->next)
{
for (i = 0; i < sizeof(struct in6_addr); i++) {
prefix_h2.sin6_addr.s6_addr[i] =
grp_mask_ptr->group_addr.sin6_addr.s6_addr[i]
& grp_mask_ptr->group_mask.s6_addr[i];
}
if (inet6_greaterthan(&prefix_h2, &prefix_h))
continue;
else
break;
}
if ((grp_mask_ptr != (grp_mask_t *) NULL)
&& (IN6_ARE_ADDR_EQUAL(&grp_mask_ptr->group_addr.sin6_addr,
&curr_group_addr.mcast_addr))
&& (IN6_ARE_ADDR_EQUAL(&grp_mask_ptr->group_mask, &curr_group_mask))
&& (grp_mask_ptr->group_rp_number + curr_frag_rp_count
== curr_rp_count))
{
/* All missing PRs have arrived. Add all RP entries */
while (curr_frag_rp_count--)
{
GET_EUADDR6(&curr_rp_addr, data_ptr);
GET_HOSTSHORT(curr_rp_holdtime, data_ptr);
GET_BYTE(curr_rp_priority, data_ptr);
GET_BYTE(reserved_byte, data_ptr);
MASKLEN_TO_MASK6(curr_group_addr.masklen, curr_group_mask);
rpp_.sin6_addr = curr_rp_addr.unicast_addr;
rpp_.sin6_scope_id=0;
group_.sin6_addr = curr_group_addr.mcast_addr;
group_.sin6_scope_id = inet6_uvif2scopeid(&group_,v);
add_rp_grp_entry(&cand_rp_list,
&grp_mask_list,
&rpp_,
curr_rp_priority,
curr_rp_holdtime,
&group_,
curr_group_mask,
curr_bsr_hash_mask,
curr_bsr_fragment_tag);
}
/* Add the rest from the previously saved segments */
for (grp_rp_entry_ptr = grp_mask_ptr->grp_rp_next;
grp_rp_entry_ptr != (rp_grp_entry_t *) NULL;
grp_rp_entry_ptr = grp_rp_entry_ptr->grp_rp_next)
{
group_.sin6_addr = curr_group_addr.mcast_addr;
group_.sin6_scope_id = inet6_uvif2scopeid(&group_,v);
add_rp_grp_entry(&cand_rp_list,
&grp_mask_list,
&grp_rp_entry_ptr->rp->rpentry->address,
grp_rp_entry_ptr->priority,
grp_rp_entry_ptr->holdtime,
&group_,
curr_group_mask,
curr_bsr_hash_mask,
curr_bsr_fragment_tag);
}
group_.sin6_addr = curr_group_addr.mcast_addr;
group_.sin6_scope_id = inet6_uvif2scopeid(&group_,v);
delete_grp_mask(&segmented_cand_rp_list,
&segmented_grp_mask_list,
&group_,
curr_group_mask);
}
else
{
/* Add the partially received RP-list to the group of pending RPs */
while (curr_frag_rp_count--)
{
GET_EUADDR6(&curr_rp_addr, data_ptr);
GET_HOSTSHORT(curr_rp_holdtime, data_ptr);
GET_BYTE(curr_rp_priority, data_ptr);
GET_BYTE(reserved_byte, data_ptr);
MASKLEN_TO_MASK6(curr_group_addr.masklen, curr_group_mask);
rpp_.sin6_addr = curr_rp_addr.unicast_addr;
group_.sin6_addr = curr_group_addr.mcast_addr;
group_.sin6_scope_id = inet6_uvif2scopeid(&group_,v);
add_rp_grp_entry(&segmented_cand_rp_list,
&segmented_grp_mask_list,
&rpp_,
curr_rp_priority,
curr_rp_holdtime,
&group_,
curr_group_mask,
curr_bsr_hash_mask,
curr_bsr_fragment_tag);
}
}
}
garbage_collect:
/*
* Garbage collection. Check all group prefixes and if the fragment_tag
* for a group_prefix is the same as curr_bsr_fragment_tag, then remove
* all RPs for this group_prefix which have different fragment tag.
*/
for (grp_mask_ptr = grp_mask_list;
grp_mask_ptr != (grp_mask_t *) NULL;
grp_mask_ptr = grp_mask_next)
{
grp_mask_next = grp_mask_ptr->next;
if (grp_mask_ptr->fragment_tag == curr_bsr_fragment_tag)
{
for (grp_rp_entry_ptr = grp_mask_ptr->grp_rp_next;
grp_rp_entry_ptr != (rp_grp_entry_t *) NULL;
grp_rp_entry_ptr = grp_rp_entry_next)
{
grp_rp_entry_next = grp_rp_entry_ptr->grp_rp_next;
if (grp_rp_entry_ptr->fragment_tag != curr_bsr_fragment_tag)
delete_rp_grp_entry(&cand_rp_list, &grp_mask_list,
grp_rp_entry_ptr);
}
}
}
/* Cleanup also the list used by incompleted segments */
for (grp_mask_ptr = segmented_grp_mask_list;
grp_mask_ptr != (grp_mask_t *) NULL;
grp_mask_ptr = grp_mask_next)
{
grp_mask_next = grp_mask_ptr->next;
if (grp_mask_ptr->fragment_tag == curr_bsr_fragment_tag)
{
for (grp_rp_entry_ptr = grp_mask_ptr->grp_rp_next;
grp_rp_entry_ptr != (rp_grp_entry_t *) NULL;
grp_rp_entry_ptr = grp_rp_entry_next)
{
grp_rp_entry_next = grp_rp_entry_ptr->grp_rp_next;
if (grp_rp_entry_ptr->fragment_tag != curr_bsr_fragment_tag)
delete_rp_grp_entry(&segmented_cand_rp_list,
&segmented_grp_mask_list,
grp_rp_entry_ptr);
}
}
}
return (TRUE);
}
void
send_pim6_bootstrap()
{
int datalen;
mifi_t mifi;
if ((datalen = create_pim6_bootstrap_message(pim6_send_buf)))
{
for (mifi = 0; mifi < numvifs; mifi++)
{
if (uvifs[mifi].uv_flags & (VIFF_DISABLED | VIFF_DOWN |
MIFF_REGISTER | VIFF_TUNNEL))
continue;
send_pim6(pim6_send_buf, &uvifs[mifi].uv_linklocal->pa_addr,
&allpim6routers_group, PIM_BOOTSTRAP, datalen);
uvifs[mifi].uv_out_pim6_bootsrap++;
}
}
}
/************************************************************************
* PIM_CAND_RP_ADV
************************************************************************/
/*
* minimum length of a cand. RP adv. message;
* length of PIM header + prefix-cnt(1) + priority(1) + holdtime(2) +
* encoded unicast RP addr(18)
*/
#define PIM6_CAND_RP_ADV_MINLEN (PIM_MINLEN + PIM6_ENCODE_UNI_ADDR_LEN)
/*
* If I am the Bootstrap router, process the advertisement, otherwise ignore
* it.
*/
int
receive_pim6_cand_rp_adv(src, dst, pim_message, datalen)
struct sockaddr_in6 *src,
*dst;
char *pim_message;
register int datalen;
{
u_int8 prefix_cnt;
u_int8 priority;
u_int16 holdtime;
pim6_encod_uni_addr_t cand_rp_addr;
pim6_encod_grp_addr_t encod_grp_addr;
u_int8 *data_ptr;
struct in6_addr grp_mask;
struct sockaddr_in6 group_, rpp_;
pim6dstat.in_pim6_cand_rp++;
/* if I am not the bootstrap RP, then do not accept the message */
if ((cand_bsr_flag != FALSE) &&
!inet6_equal(&curr_bsr_address, &my_bsr_address))
{
log(LOG_NOTICE, 0,
"receive_pim6_cand_rp_adv: receive cand_RP from %s "
"but I'm not the BSR",
inet6_fmt(&src->sin6_addr));
return (FALSE);
}
/* sanity check for the minimum length */
if (datalen < PIM6_CAND_RP_ADV_MINLEN) {
log(LOG_NOTICE, 0,
"receive_pim6_cand_rp_adv: cand_RP message size(%u) is"
" too short from %s",
datalen, inet6_fmt(&src->sin6_addr));
return(FALSE);
}
datalen -= PIM6_CAND_RP_ADV_MINLEN;
data_ptr = (u_int8 *) (pim_message + sizeof(struct pim));
/* Parse the CAND_RP_ADV message */
GET_BYTE(prefix_cnt, data_ptr);
GET_BYTE(priority, data_ptr);
GET_HOSTSHORT(holdtime, data_ptr);
GET_EUADDR6(&cand_rp_addr, data_ptr);
/*
* The RP Address field is set to the globally reachable IPv6 address
* [draft-ietf-pim-ipv6].
*/
if (IN6_IS_ADDR_LINKLOCAL(&cand_rp_addr.unicast_addr)) {
/* XXX: prohibit a site-local address as well? */
log(LOG_WARNING, 0,
"receive_pim6_cand_rp_adv: non global address(%s) as RP",
inet6_fmt(&cand_rp_addr.unicast_addr));
return(FALSE);
}
memset(&rpp_, 0, sizeof(rpp_));
if (prefix_cnt == 0)
{
/* The default ff:: and masklen of 8 */
MASKLEN_TO_MASK6(ALL_MCAST_GROUPS_LENGTH, grp_mask);
rpp_.sin6_addr = cand_rp_addr.unicast_addr;
/*
* note that we don't have to take care of scope id, since
* the address should be global(see above).
*/
add_rp_grp_entry(&cand_rp_list, &grp_mask_list,
&rpp_, priority, holdtime,
&sockaddr6_d, grp_mask,
my_bsr_hash_mask,
curr_bsr_fragment_tag);
return (TRUE);
}
while (prefix_cnt--)
{
/*
* Sanity check for the message length.
* XXX: do we have to do the check at an earlier stage and
* discard the whole message (instead of adopting a part of it)
* if it's bogus?
*/
if (datalen < PIM6_ENCODE_GRP_ADDR_LEN) {
log(LOG_NOTICE, 0,
"receive_pim6_cand_rp_adv: cand_RP message from %s is"
" too short to contain enough groups",
inet6_fmt(&src->sin6_addr));
return(FALSE);
}
datalen -= PIM6_ENCODE_GRP_ADDR_LEN;
GET_EGADDR6(&encod_grp_addr, data_ptr);
MASKLEN_TO_MASK6(encod_grp_addr.masklen, grp_mask);
group_.sin6_addr = encod_grp_addr.mcast_addr;
group_.sin6_scope_id = 0; /* XXX: what if for scoped multicast addr? */
rpp_.sin6_addr = cand_rp_addr.unicast_addr;
/* see above note on scope id */
add_rp_grp_entry(&cand_rp_list, &grp_mask_list,
&rpp_, priority, holdtime,
&group_, grp_mask,
my_bsr_hash_mask,
curr_bsr_fragment_tag);
}
return (TRUE);
}
int
send_pim6_cand_rp_adv()
{
u_int8 prefix_cnt;
struct in6_addr grp_mask;
pim6_encod_grp_addr_t encod_grp_addr;
u_int8 *data_ptr;
struct sockaddr_in6 group_;
if (!inet6_valid_host(&curr_bsr_address))
return (FALSE); /* No BSR yet */
if( inet6_equal(&curr_bsr_address, &my_bsr_address))
{
/* I am the BSR and have to include my own group_prefix stuff */
prefix_cnt = *cand_rp_adv_message.prefix_cnt_ptr;
if (prefix_cnt == 0)
{
/* The default ff00:: and masklen of 8 */
MASKLEN_TO_MASK6(ALL_MCAST_GROUPS_LENGTH, grp_mask);
add_rp_grp_entry(&cand_rp_list, &grp_mask_list,
&my_cand_rp_address, my_cand_rp_priority,
my_cand_rp_holdtime,
&sockaddr6_d,
grp_mask,
my_bsr_hash_mask,
curr_bsr_fragment_tag);
return (TRUE);
}
/* TODO: hardcoding!! */
/* 18 = sizeof(pim6_encod_uni_addr_t) without padding */
data_ptr = cand_rp_adv_message.buffer + (4 + 18);
while (prefix_cnt--)
{
GET_EGADDR6(&encod_grp_addr, data_ptr);
MASKLEN_TO_MASK6(encod_grp_addr.masklen, grp_mask);
group_.sin6_addr = encod_grp_addr.mcast_addr;
group_.sin6_scope_id = 0; /*XXX */
add_rp_grp_entry(&cand_rp_list,
&grp_mask_list,
&my_cand_rp_address, my_cand_rp_priority,
my_cand_rp_holdtime,
&group_, grp_mask,
my_bsr_hash_mask,
curr_bsr_fragment_tag);
}
return (TRUE);
}
data_ptr = (u_int8 *) (pim6_send_buf + sizeof(struct pim));
bcopy((char *)cand_rp_adv_message.buffer, (char *) data_ptr,
cand_rp_adv_message.message_size);
send_pim6(pim6_send_buf, &my_cand_rp_address, &curr_bsr_address ,
PIM_CAND_RP_ADV, cand_rp_adv_message.message_size);
pim6dstat.out_pim6_cand_rp++;
return TRUE;
}
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