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freebsd-skq/usr.sbin/pim6sd/config.c
Yoshinobu Inoue 0fea3d5165 IPv6 multicast routing. 
kernel IPv6 multicast routing support.
  pim6 dense mode daemon
  pim6 sparse mode daemon
  netstat support of IPv6 multicast routing statistics

  Merging to the current and testing with other existing multicast routers
  is done by Tatsuya Jinmei <jinmei@kame.net>, who writes and maintainances
  the base code in KAME distribution.

  Make world check and kernel build check was also successful.
2000-01-28 05:10:56 +00:00

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/*
* 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".
*
*/
/*
* Part of this program has been derived from mrouted.
* The mrouted program is covered by the license in the accompanying file
* named "LICENSE.mrouted".
*
* The mrouted program is COPYRIGHT 1989 by The Board of Trustees of
* Leland Stanford Junior University.
*
* $FreeBSD$
*/
#include <sys/ioctl.h>
#include <syslog.h>
#include <stdlib.h>
#include "vif.h"
#include "pim6.h"
#include "inet6.h"
#include "rp.h"
#include "pimd.h"
#include "timer.h"
#include "route.h"
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
#include <net/if_var.h>
#endif
#include <netinet6/in6_var.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include "config.h"
#include <arpa/inet.h>
#include <stdio.h>
#include "debug.h"
void add_phaddr(struct uvif *v , struct sockaddr_in6 *addr,struct in6_addr *mask);
char *next_word(char **s);
int wordToOption(char *word);
int parse_phyint(char *s);
int parse_candidateRP(char *s);
int parse_group_prefix(char *s);
int parseBSR(char *s);
int parse_reg_threshold(char *s);
int parse_data_threshold(char *s);
int parse_default_source_metric(char *s);
int parse_default_source_preference(char *s);
int parse_hello_period(char *s);
int parse_granularity(char *s);
int parse_jp_period(char *s);
int parse_data_timeout(char *s);
int parse_register_suppression_timeout(char *s);
int parse_probe_time(char *s);
int parse_assert_timeout(char *s);
void
config_vifs_from_kernel()
{
struct ifreq *ifrp,*ifend;
register struct uvif *v;
register vifi_t vifi;
int n,i;
struct sockaddr_in6 addr;
struct in6_addr mask;
short flags;
int num_ifreq = 64;
struct ifconf ifc;
total_interfaces= 0; /* The total number of physical interfaces */
ifc.ifc_len = num_ifreq * sizeof (struct ifreq);
ifc.ifc_buf = calloc(ifc.ifc_len,sizeof(char));
while (ifc.ifc_buf) {
caddr_t newbuf;
if (ioctl(udp_socket,SIOCGIFCONF,(char *)&ifc) <0)
log(LOG_ERR, errno, "ioctl SIOCGIFCONF");
/*
* If the buffer was large enough to hold all the addresses
* then break out, otherwise increase the buffer size and
* try again.
*
* The only way to know that we definitely had enough space
* is to know that there was enough space for at least one
* more struct ifreq. ???
*/
if( (num_ifreq * sizeof (struct ifreq)) >=
ifc.ifc_len + sizeof(struct ifreq))
break;
num_ifreq *= 2;
ifc.ifc_len = num_ifreq * sizeof(struct ifreq);
newbuf = realloc(ifc.ifc_buf, ifc.ifc_len);
if (newbuf == NULL)
free(ifc.ifc_buf);
ifc.ifc_buf = newbuf;
}
if (ifc.ifc_buf == NULL)
log(LOG_ERR, 0, "config_vifs_from_kernel: ran out of memory");
ifrp = (struct ifreq *) ifc.ifc_buf;
ifend = (struct ifreq * ) (ifc.ifc_buf + ifc.ifc_len);
/*
* Loop through all of the interfaces.
*/
for(;ifrp < ifend;ifrp = (struct ifreq *)((char *)ifrp+n))
{
struct ifreq ifr;
struct in6_ifreq ifr6;
#ifdef HAVE_SA_LEN
n = ifrp->ifr_addr.sa_len + sizeof(ifrp->ifr_name);
if(n < sizeof(*ifrp))
n=sizeof(*ifrp);
#else
n=sizeof(*ifrp);
#endif
/*
* Ignore any interface for an address family other than IPv6.
*/
if ( ifrp->ifr_addr.sa_family != AF_INET6)
{
/* Eventually may have IP address later */
total_interfaces++;
continue;
}
memcpy(&addr,&ifrp->ifr_addr,sizeof(struct sockaddr_in6));
/*
* Need a template to preserve address info that is
* used below to locate the next entry. (Otherwise,
* SIOCGIFFLAGS stomps over it because the requests
* are returned in a union.)
*/
memcpy(ifr.ifr_name,ifrp->ifr_name,sizeof(ifr.ifr_name));
memcpy(ifr6.ifr_name,ifrp->ifr_name,sizeof(ifr6.ifr_name));
if(ioctl(udp_socket,SIOCGIFFLAGS,(char *)&ifr) <0)
log(LOG_ERR, errno, "ioctl SIOCGIFFLAGS for %s", ifr.ifr_name);
flags = ifr.ifr_flags;
#if 0
/*
* Ignore loopback interfaces and interfaces that do not
* support multicast.
*/
if((flags & (IFF_LOOPBACK | IFF_MULTICAST ))!= IFF_MULTICAST)
continue;
#endif
/*
* Get netmask of the address.
*/
ifr6.ifr_addr = *(struct sockaddr_in6 *)&ifrp->ifr_addr;
if(ioctl(udp_socket, SIOCGIFNETMASK_IN6, (char *)&ifr6) <0)
log(LOG_ERR, errno, "ioctl SIOCGIFNETMASK_IN6 for %s",
inet6_fmt(&ifr6.ifr_addr.sin6_addr));
memcpy(&mask,&ifr6.ifr_addr.sin6_addr,sizeof(mask));
/*
* Get IPv6 specific flags, and ignore an anycast address.
* XXX: how about a deprecated, tentative, duplicated or
* detached address?
*/
ifr6.ifr_addr = *(struct sockaddr_in6 *)&ifrp->ifr_addr;
if (ioctl(udp_socket, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
log(LOG_ERR, errno, "ioctl SIOCGIFAFLAG_IN6 for %s",
inet6_fmt(&ifr6.ifr_addr.sin6_addr));
}
else {
if (ifr6.ifr_ifru.ifru_flags6 & IN6_IFF_ANYCAST) {
log(LOG_DEBUG, 0, "config_vifs_from_kernel: "
"%s on %s is an anycast address, ignored",
inet6_fmt(&ifr6.ifr_addr.sin6_addr),
ifr.ifr_name);
continue;
}
}
if (IN6_IS_ADDR_LINKLOCAL(&addr.sin6_addr))
{
addr.sin6_scope_id = if_nametoindex(ifrp->ifr_name);
#ifdef __KAME__
/*
* Hack for KAME kernel.
* Set sin6_scope_id field of a link local address and clear
* the index embedded in the address.
*/
/* clear interface index */
addr.sin6_addr.s6_addr[2] = 0;
addr.sin6_addr.s6_addr[3] = 0;
#endif
}
/*
* If the address is connected to the same subnet as one
* already installed in the uvifs array, just add the address
* to the list of addresses of the uvif.
*/
for(vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v)
{
if( strcmp(v->uv_name , ifr.ifr_name) == 0 )
{
add_phaddr(v, &addr,&mask);
break;
}
}
if( vifi != numvifs )
continue;
/*
* If there is room in the uvifs array, install this interface.
*/
if( numvifs == MAXMIFS )
{
log(LOG_WARNING, 0,
"too many vifs, ignoring %s", ifr.ifr_name);
continue;
}
/*
* Everyone below is a potential vif interface.
* We don't care if it has wrong configuration or not
* configured at all.
*/
total_interfaces++;
v = &uvifs[numvifs];
v->uv_dst_addr = allpim6routers_group;
v->uv_subnetmask = mask;
strncpy ( v->uv_name , ifr.ifr_name,IFNAMSIZ);
v->uv_ifindex = if_nametoindex(v->uv_name);
add_phaddr(v,&addr,&mask);
/* prefix local calc. (and what about add_phaddr?...) */
for (i = 0; i < sizeof(struct in6_addr); i++)
v->uv_prefix.sin6_addr.s6_addr[i] =
addr.sin6_addr.s6_addr[i] & mask.s6_addr[i];
if(flags & IFF_POINTOPOINT)
v->uv_flags |=(VIFF_REXMIT_PRUNES | VIFF_POINT_TO_POINT);
/*
* Disable multicast routing on loopback interfaces and
* interfaces that do not support multicast. But they are
* still necessary, since global addresses maybe assigned only
* on such interfaces.
*/
if ((flags & IFF_LOOPBACK) != 0 || (flags & IFF_MULTICAST) == 0)
v->uv_flags |= VIFF_DISABLED;
IF_DEBUG(DEBUG_IF)
log(LOG_DEBUG,0,
"Installing %s (%s on subnet %s) ,"
"as vif #%u - rate = %d",
v->uv_name,inet6_fmt(&addr.sin6_addr),
net6name(&v->uv_prefix.sin6_addr,&mask),
numvifs,v->uv_rate_limit);
++numvifs;
if( !(flags & IFF_UP))
{
v->uv_flags |= VIFF_DOWN;
vifs_down = TRUE;
}
}
}
void
add_phaddr(struct uvif *v,struct sockaddr_in6 *addr,struct in6_addr *mask)
{
struct phaddr *pa;
int i;
if( (pa=malloc(sizeof(*pa))) == NULL)
log(LOG_ERR, 0, "add_phaddr: memory exhausted");
memset(pa,0,sizeof(*pa));
pa->pa_addr= *addr;
pa->pa_subnetmask = *mask;
for(i = 0; i < sizeof(struct in6_addr); i++)
pa->pa_prefix.sin6_addr.s6_addr[i] =
addr->sin6_addr.s6_addr[i] & mask->s6_addr[i];
pa->pa_prefix.sin6_scope_id = addr->sin6_scope_id;
if(IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr)) {
if(v->uv_linklocal)
log(LOG_WARNING, 0,
"add_phaddr: found more than one link-local "
"address on %s",
v->uv_name);
v->uv_linklocal = pa;
}
pa->pa_next = v->uv_addrs;
v->uv_addrs = pa;
}
void
config_vifs_from_file()
{
FILE *f;
char linebuf[100];
char *w,*s;
struct ifconf ifc;
int option;
char ifbuf[BUFSIZ];
u_int8 *data_ptr;
if((f=fopen(configfilename,"r"))==NULL)
{
if( errno != ENOENT)
log(LOG_ERR,errno,"Can't open %s",configfilename);
log(LOG_WARNING,errno,"Can't open %s",configfilename);
return;
}
/*
* Note that sizeof(pim6_enocd_uni_addr_t) might be larger than
* the length of the Encoded-Unicast-address field(18 byte) due to
* some padding put in the compiler. However, it doesn't matter
* since we use the space just as a buffer(i.e not as the message).
*/
cand_rp_adv_message.buffer = (u_int8 *)malloc( 4 + sizeof(pim6_encod_uni_addr_t) +
255*sizeof(pim6_encod_grp_addr_t));
if(cand_rp_adv_message.buffer == NULL)
log(LOG_ERR,errno,"Candrpadv Buffer allocation");
cand_rp_adv_message.prefix_cnt_ptr = cand_rp_adv_message.buffer;
/* By default, if no group_prefix configured, then prefix_cnt == 0
* implies group_prefix = ff::/8 and masklen = 8.
*/
*cand_rp_adv_message.prefix_cnt_ptr = 0;
cand_rp_adv_message.insert_data_ptr = cand_rp_adv_message.buffer;
/* TODO: XXX: HARDCODING!!! */
cand_rp_adv_message.insert_data_ptr += (4 + 18);
ifc.ifc_buf = ifbuf;
ifc.ifc_len = sizeof(ifbuf);
if(ioctl(udp_socket,SIOCGIFCONF,(char *)&ifc) < 0)
log(LOG_ERR, errno, "ioctl SIOCGIFCONF");
while( fgets(linebuf, sizeof(linebuf),f) != NULL )
{
s = linebuf;
w = next_word(&s);
option = wordToOption(w);
switch(option)
{
case EMPTY:
continue;
break;
case PHYINT:
parse_phyint(s);
break;
case CANDIDATE_RP:
parse_candidateRP(s);
break;
case GROUP_PREFIX:
parse_group_prefix(s);
break;
case BOOTSTRAP_RP:
parseBSR(s);
break;
case REG_THRESHOLD:
parse_reg_threshold(s);
break;
case DATA_THRESHOLD:
parse_data_threshold(s);
break;
case DEFAULT_SOURCE_METRIC:
parse_default_source_metric(s);
break;
case DEFAULT_SOURCE_PREFERENCE :
parse_default_source_preference(s);
break;
case HELLO_PERIOD :
parse_hello_period(s);
break;
case GRANULARITY :
parse_granularity(s);
break;
case JOIN_PRUNE_PERIOD :
parse_jp_period(s);
break;
case DATA_TIMEOUT :
parse_data_timeout(s);
break;
case REGISTER_SUPPRESSION_TIMEOUT :
parse_register_suppression_timeout(s);
break;
case PROBE_TIME :
parse_probe_time(s);
break;
case ASSERT_TIMEOUT:
parse_assert_timeout(s);
break;
default:
log(LOG_WARNING, 0, "unknown command '%s' in %s",
w, configfilename);
}
}
cand_rp_adv_message.message_size = cand_rp_adv_message.insert_data_ptr - cand_rp_adv_message.buffer;
if (cand_rp_flag != FALSE)
{
my_cand_rp_holdtime = 2.5 * my_cand_rp_adv_period;
/* TODO: HARDCODING! */
data_ptr = cand_rp_adv_message.buffer + 1; /* WARNING */
PUT_BYTE(my_cand_rp_priority,data_ptr);
PUT_HOSTSHORT(my_cand_rp_holdtime, data_ptr);
PUT_EUADDR6(my_cand_rp_address.sin6_addr,data_ptr);
IF_DEBUG(DEBUG_PIM_CAND_RP)
{
log(LOG_DEBUG, 0,
"Local Cand-RP address is : %s",
inet6_fmt(&my_cand_rp_address.sin6_addr));
log(LOG_DEBUG, 0,
"Local Cand-RP priority is : %u",my_cand_rp_priority);
log(LOG_DEBUG, 0,
"Local Cand-RP advertisement period is : %u sec.",
my_cand_rp_adv_period);
}
}
if( cand_bsr_flag!=FALSE)
{
IF_DEBUG(DEBUG_PIM_BOOTSTRAP)
{
log(LOG_DEBUG, 0,
"Local BSR address: %s",
inet6_fmt(&my_bsr_address.sin6_addr));
log(LOG_DEBUG, 0,
"Local BSR priority : %u",my_bsr_priority);
log(LOG_DEBUG,0,
"Local BSR period is : %u sec.",
my_bsr_period);
}
}
IF_DEBUG(DEBUG_SWITCH)
{
log(LOG_DEBUG,0,"reg_rate_limit set to %u (bits/s)" , pim_reg_rate_bytes);
log(LOG_DEBUG,0,"reg_rate_interval set to %u s.",pim_reg_rate_check_interval);
log(LOG_DEBUG,0,"data_rate_limit set to %u (bits/s)" , pim_data_rate_bytes);
log(LOG_DEBUG,0,"data_rate_interval set to %u s.",pim_data_rate_check_interval);
}
IF_DEBUG(DEBUG_PIM_HELLO)
{
log(LOG_DEBUG,0, "pim_hello_period set to: %u", pim_hello_period);
log(LOG_DEBUG,0, "pim_hello_holdtime set to: %u", pim_hello_holdtime);
}
IF_DEBUG(DEBUG_PIM_JOIN_PRUNE)
{
log(LOG_DEBUG,0, "pim_join_prune_period set to: %u", pim_join_prune_period);
log(LOG_DEBUG,0, "pim_join_prune_holdtime set to: %u", pim_join_prune_holdtime);
}
fclose(f);
}
/*
* function name: wordToOption
* input: char *word, a pointer to the word
* output: int; a number corresponding to the code of the word
* operation: converts the result of the string comparisons into numerics.
* comments: called by config_vifs_from_file()
*/
int wordToOption(char *word)
{
if (EQUAL(word, ""))
return EMPTY;
if (EQUAL(word, "phyint"))
return PHYINT;
if (EQUAL(word, "cand_rp"))
return CANDIDATE_RP;
if (EQUAL(word, "group_prefix"))
return GROUP_PREFIX;
if (EQUAL(word, "cand_bootstrap_router"))
return BOOTSTRAP_RP;
if (EQUAL(word, "switch_register_threshold"))
return REG_THRESHOLD;
if (EQUAL(word, "switch_data_threshold"))
return DATA_THRESHOLD;
if (EQUAL(word, "default_source_metric"))
return DEFAULT_SOURCE_METRIC;
if (EQUAL(word, "default_source_preference"))
return DEFAULT_SOURCE_PREFERENCE;
if (EQUAL(word, "hello_period"))
return HELLO_PERIOD;
if (EQUAL(word, "granularity"))
return GRANULARITY;
if (EQUAL(word, "join_prune_period"))
return JOIN_PRUNE_PERIOD;
if (EQUAL(word, "data_timeout"))
return DATA_TIMEOUT;
if (EQUAL(word, "register_suppression_timeout"))
return REGISTER_SUPPRESSION_TIMEOUT;
if (EQUAL(word, "probe_time"))
return PROBE_TIME;
if (EQUAL(word, "assert_timeout"))
return PROBE_TIME;
return UNKNOWN;
}
/*
* function name: parse_phyint
* input: char *s, pointing to the parsing point of the file
* output: int (TRUE if the parsing was successful, o.w. FALSE)
* operation: parses the physical interface file configurations, if any.
* The general form is:
* phyint <ifname> [disable] [preference <p>] [metric <m>]
*/
int parse_phyint(char *s)
{
char *w,c,*ifname;
vifi_t vifi;
struct uvif *v;
u_int n;
if(EQUAL((w = next_word(&s)),""))
{
log(LOG_WARNING, 0, "Missing phyint name in %s", configfilename);
return FALSE;
}
ifname = w;
for (vifi = 0,v=uvifs;vifi <= numvifs ; ++vifi , ++v)
{
if(vifi == numvifs)
{
log(LOG_WARNING, 0,
"Invalid phyint name (maybe not configured..) '%s' "
"in %s", w, configfilename);
return FALSE;
}
if(strcmp(v->uv_name,ifname))
continue;
while(!EQUAL((w = next_word(&s)),""))
{
if(EQUAL(w,"disable"))
v->uv_flags |=VIFF_DISABLED;
else if (EQUAL(w, "nolistener"))
v->uv_flags |= VIFF_NOLISTENER;
else
{
if(EQUAL(w,"preference"))
{
if(EQUAL((w=next_word(&s)),""))
{
log(LOG_WARNING, 0,
"Missing preference for "
"phyint %s in %s",
ifname, configfilename);
}
else
{
if (sscanf(w,"%u%c",&n,&c) != 1 ||
n < 1 || n > 255 )
{
log(LOG_WARNING, 0,
"Invalid preference "
"'%s' for phyint %s "
"in %s",
w, ifname,
configfilename);
}
else
{
IF_DEBUG(DEBUG_ASSERT)
log(LOG_DEBUG, 0,"Config setting default local preference on %d to %s",n,ifname);
v->uv_local_pref = n;
}
}
}
else
{
if(EQUAL(w, "metric"))
{
if(EQUAL((w = next_word(&s)), ""))
{
log(LOG_WARNING,0,
"Missing metric for "
"phyint %s in %s",
ifname,
configfilename);
}
else
{
if (sscanf(w, "%u%c", &n, &c) != 1 ||
n < 1 || n > 1024 )
{
log(LOG_WARNING,0,
"Invalid metric '%s' for phyint %s in %s",
w, ifname,configfilename);
}
else
{
IF_DEBUG(DEBUG_ASSERT)
log(LOG_DEBUG,0,
"Config setting default local metric on %d to %s.",
n,ifname);
v->uv_local_metric = n;
}
}
}
}
}
}
break;
}
return(TRUE);
}
/*
* function name: parse_candidateRP
* input: char *s
* output: int (TRUE if the parsing was successful, o.w. FALSE)
* operation: parses the candidate RP information.
* The general form is:
* 'cand_rp <ifname> [priority <number>] [time <number>]'.
*/
int
parse_candidateRP(char *s)
{
char *w;
struct sockaddr_in6 *sa6_rp;
u_int time = PIM_DEFAULT_CAND_RP_ADV_PERIOD;
u_int priority = PIM_DEFAULT_CAND_RP_PRIORITY;
sa6_rp = NULL;
cand_rp_flag = FALSE;
my_cand_rp_adv_period = PIM_DEFAULT_CAND_RP_ADV_PERIOD;
while(!EQUAL((w = next_word(&s)),""))
{
if((!EQUAL(w,"priority")) && (!EQUAL(w,"time")))
{
/*
* if the interface is specified and is valid
* we take the max global address of the interface
* (aliasing) else look at the end of the function.
*/
sa6_rp = local_iface(w);
if(!sa6_rp)
log(LOG_WARNING, 0,
"cand_rp '%s' in %s is not configured."
"take the max local address the router..",
w, configfilename);
}
else
{
if (EQUAL(w,"priority"))
{
if (EQUAL((w = next_word(&s)),""))
{
log(LOG_WARNING,0,
"Missing priority ; set to default "
": %d (0 is highest )",priority);
}
else
{
if (sscanf(w,"%u",&priority)!= 1 )
{
priority = PIM_DEFAULT_CAND_RP_PRIORITY;
log(LOG_WARNING, 0,
"Invalid priority '%' "
"for cand_rp;set to default "
"(0 is highest) : %d",
w, priority);
}
}
}
else
{
if (EQUAL((w = next_word(&s)),""))
{
log(LOG_WARNING, 0,
"Missing cand_adv period ;"
"set to default : %d",time);
}
else
{
if (sscanf(w,"%u",&time)!= 1 )
{
time = PIM_DEFAULT_CAND_RP_ADV_PERIOD;
log(LOG_WARNING, 0,
"Invalid cand_adv_period "
"'%s';set to default : %d",
w,time);
}
else
{
if( time > (my_cand_rp_adv_period = ~0))
time = my_cand_rp_adv_period;
else
if(time <10)
time = 10;
else
if (time > PIM_DEFAULT_CAND_RP_ADV_PERIOD)
time = PIM_DEFAULT_CAND_RP_ADV_PERIOD;
my_cand_rp_adv_period = time;
}
}
}
}
}
if(!sa6_rp)
sa6_rp= max_global_address();
my_cand_rp_address=*sa6_rp;
my_cand_rp_priority = priority;
my_cand_rp_adv_period = time;
cand_rp_flag = TRUE;
return TRUE;
}
/*
* function name: parse_group_prefix
* input: char *s
* output: int
* operation: parse group_prefix configured information.
* General form: 'group_prefix <group-addr>/<prefix_len>'.
*/
int
parse_group_prefix(char *s)
{
char *w;
struct in6_addr group_addr;
u_int32 masklen=PIM_GROUP_PREFIX_DEFAULT_MASKLEN;
w=next_word(&s);
if (EQUAL(w,""))
{
log(LOG_WARNING, 0,
"Configuration error for 'group_prefix' in %s: no group_addr. "
"Ignoring...", configfilename);
return FALSE;
}
w=strtok(w,"/");
if ( inet_pton(AF_INET6,w,(void *)&group_addr) != 1 )
{
log(LOG_WARNING, 0,
"Config error in %s : Bad ddress formatt.Ignoring..",
configfilename);
return FALSE;
}
if (!IN6_IS_ADDR_MULTICAST(&group_addr))
{
log(LOG_WARNING,0,
"Config error in %s: '%s' is not a mcast addr.Ignoring",
configfilename,
inet6_fmt(&group_addr));
return FALSE;
}
if (!(~(*cand_rp_adv_message.prefix_cnt_ptr)))
{
log(LOG_WARNING, 0,
"Too many group_prefix configured. Truncating...");
return FALSE;
}
w=strtok(NULL,"/");
if(w==NULL)
{
log(LOG_WARNING,0,
"Config error in %s : missing group prefix.Ignoring..",
configfilename);
return FALSE;
}
if ( sscanf(w,"%u",&masklen) ==1 )
{
if (masklen > (sizeof(group_addr) * 8))
masklen = (sizeof(group_addr)*8);
else
if (masklen <PIM_GROUP_PREFIX_DEFAULT_MASKLEN)
masklen = PIM_GROUP_PREFIX_DEFAULT_MASKLEN;
}
PUT_EGADDR6(group_addr, (u_int8)masklen, 0,
cand_rp_adv_message.insert_data_ptr);
(*cand_rp_adv_message.prefix_cnt_ptr)++;
return TRUE;
}
/*
* function name: parseBSR
* input: char *s
* output: int
* operation: parse the candidate BSR configured information.
* General form:
* 'cand_bootstrap_router <ifname> [priority <number>]'.
* this function is similar to parse_candrp
*/
int
parseBSR(char *s)
{
char *w;
struct sockaddr_in6 *sa6_bsr;
u_int32 priority = PIM_DEFAULT_BSR_PRIORITY;
u_int time = PIM_DEFAULT_BOOTSTRAP_PERIOD;
my_bsr_period = PIM_DEFAULT_BOOTSTRAP_PERIOD;
sa6_bsr = NULL;
cand_bsr_flag = FALSE;
while(!EQUAL((w = next_word(&s)),""))
{
if((!EQUAL(w,"priority")) && (!EQUAL(w,"time")))
{
sa6_bsr = local_iface(w);
if(!sa6_bsr)
{
log(LOG_WARNING,0,
"cand_bootstrap_router '%s' in %s is not "
"configured.Take the max router address.",
w,configfilename);
}
}
else
{
if(EQUAL(w,"priority"))
{
if (EQUAL((w = next_word(&s)),""))
{
log(LOG_WARNING, 0,
"Missing priority for the bsr;set to "
"default (0 is lowest): %d",priority);
}
else
{
if (sscanf(w,"%u",&priority)!= 1 )
{
priority = PIM_DEFAULT_BSR_PRIORITY;
log(LOG_WARNING, 0,
"Invalid priority '%s'for "
"the bsr;set to default : %d",
w, priority);
}
else
{
if( priority > (my_bsr_priority = ~0))
priority = my_bsr_priority;
my_bsr_priority = (u_int8)priority;
}
}
}
else
{
if( EQUAL((w=next_word(&s)),""))
{
log(LOG_WARNING,0,
"Missing bsr period ;"
"set to default : %d ",time);
}
else
{
if(sscanf(w,"%u",&time)!=1)
{
time=PIM_DEFAULT_BOOTSTRAP_PERIOD;
log(LOG_WARNING,0,
"Invalid bsr period"
"'%s';set to default : %d",
w,time);
}
else
my_bsr_period=time;
}
}
}
}
if(!sa6_bsr)
sa6_bsr = max_global_address();
my_bsr_address=*sa6_bsr;
my_bsr_priority = priority;
MASKLEN_TO_MASK6(RP_DEFAULT_IPV6_HASHMASKLEN,my_bsr_hash_mask);
cand_bsr_flag = TRUE;
return TRUE;
}
/*
* function name: parse_reg_threshold
* input: char *s
* output: int (TRUE if successful, FALSE o.w.)
* operation: reads and assigns the switch to the spt threshold
* due to registers for the router, if used as RP.
* Maybe extended to support different thresholds
* for different groups(prefixes).
* General form:
* 'switch_register_threshold [rate <number> interval <number>]'.
* comments: called by config_vifs_from_file()
*/
int parse_reg_threshold(char *s)
{
char *w;
u_int rate=PIM_DEFAULT_REG_RATE;
u_int interval= PIM_DEFAULT_REG_RATE_INTERVAL;
while(!EQUAL((w=next_word(&s)),""))
{
if(EQUAL(w,"rate"))
{
if(EQUAL((w=next_word(&s)),""))
{
log(LOG_WARNING,0,
"switch_register_threshold : missing rate ; "
"set to default : %u (bits/s)",
rate);
}
else
{
if(sscanf(w,"%u",&rate)!=1)
{
rate = PIM_DEFAULT_REG_RATE;
log(LOG_WARNING, 0,
"switch_register_threshold : "
"Invalid rate '%s' , set to defaut :"
" %u (bits/s)",
w,rate);
}
}
}
else
{
if(EQUAL(w,"interval"))
{
if(EQUAL((w = next_word(&s)),""))
{
log(LOG_WARNING,0,"switch_register_threshold : missing interval ; set to default : %u s.",
interval);
}
else
{
if(sscanf(w,"%u",&interval) != 1)
{
interval = PIM_DEFAULT_REG_RATE_INTERVAL;
log(LOG_WARNING,0,"switch_register_threshold : Invalid interval '%s' ; set to default : %u s.",
w,interval);
}
}
}
else
{
log(LOG_WARNING,0,"swhitch_register_threshold : Invalid parameter %s",w);
}
}
}
if( interval < timer_interval)
{
interval = timer_interval;
log(LOG_WARNING,0,"switch_register_threshold : Interval too short , set to default : %u s.",
interval);
}
pim_reg_rate_bytes = (rate * interval ) /10;
pim_reg_rate_check_interval = interval;
return TRUE;
}
/*
* function name: parse_data_threshold
* input: char *s
* output: int
* operation: reads and assigns the switch to the spt threshold
* due to data packets, if used as DR.
* General form:
* 'switch_data_threshold [rate <number> interval <number>]'.
* similar to register_threshold...
*/
int parse_data_threshold(char *s)
{
char *w;
u_int rate=PIM_DEFAULT_DATA_RATE;
u_int interval= PIM_DEFAULT_DATA_RATE_INTERVAL;
while(!EQUAL((w=next_word(&s)),""))
{
if(EQUAL(w,"rate"))
{
if(EQUAL((w=next_word(&s)),""))
{
log(LOG_WARNING,0,"switch_data_threshold : missing rate value ; set to defaut : %u (bits/s)",
rate);
}
else
{
if(sscanf(w,"%u",&rate)!=1)
{
rate = PIM_DEFAULT_DATA_RATE;
log(LOG_WARNING,0,"switch_data_threshold : Invalid rate '%s' ; set to default : %u (bits/s)",
w,rate);
}
}
}
else
{
if(EQUAL(w,"interval"))
{
if(EQUAL((w = next_word(&s)),""))
{
log(LOG_WARNING,0,"switch_data_threshold : missing interval value ; set to default : %u s.",
interval);
}
else
{
if(sscanf(w,"%u",&interval) != 1)
{
interval = PIM_DEFAULT_DATA_RATE_INTERVAL;
log(LOG_WARNING,0,"switch_data_threshold : Invalid interval '%s' ; set to default : %u s.",
w,interval);
}
}
}
else
{
log(LOG_WARNING,0,"swhitch_data_threshold :Invalid Parameter %s",w);
}
}
}
if( interval < timer_interval)
{
interval = timer_interval;
log(LOG_WARNING,0,"switch_data_threshold : interval too short set to default : %u s.",
interval);
}
pim_data_rate_bytes = (rate * interval ) /10;
pim_data_rate_check_interval = interval;
return TRUE;
}
/*
* function name: parse_default_source_metric
* input: char *s
* output: int
* operation: reads and assigns the default source metric, if no reliable
* unicast routing information available.
* General form:
* 'default_source_metric <number>'.
* default pref and metric statements should precede all phyint
* statements in the config file.
*/
int parse_default_source_metric(char *s)
{
char *w;
u_int value;
vifi_t vifi;
struct uvif *v;
value = DEFAULT_LOCAL_METRIC;
if (EQUAL((w = next_word(&s)), ""))
{
log(LOG_WARNING,0,
"Missing source metric value ; set to default %u",
value);
}
else
{
if (sscanf(w, "%u", &value) != 1)
{
value = DEFAULT_LOCAL_METRIC;
log(LOG_WARNING,0,
"Invalid source metric value '%s' ;set to default %u",
w,value);
}
default_source_metric = value;
log(LOG_INFO,0, "Default_source_metric is : %u", default_source_metric);
for (vifi = 0, v = uvifs; vifi < MAXVIFS; ++vifi, ++v)
{
v->uv_local_metric = default_source_metric;
}
}
return(TRUE);
}
/*
* function name: parse_default_source_preference
* input: char *s
* output: int
* operation: reads and assigns the default source preference, if no reliable
* unicast routing information available.
* General form:
* 'default_source_preference <number>'.
* default pref and metric statements should precede all phyint
* statements in the config file.
*/
int parse_default_source_preference(char *s)
{
char *w;
u_int value;
vifi_t vifi;
struct uvif *v;
value = DEFAULT_LOCAL_PREF;
if (EQUAL((w = next_word(&s)), ""))
{
log(LOG_WARNING,0,
"Missing source preference ; set to default %u",
value);
}
else
{
if (sscanf(w, "%u", &value) != 1)
{
value = DEFAULT_LOCAL_PREF;
log(LOG_WARNING,0,
"Invalid source preference value '%s' ;set to default %u",
w,value);
}
default_source_preference = value;
log(LOG_INFO,0, "default_source_preference set to: %u", default_source_preference);
for (vifi = 0, v = uvifs; vifi < MAXVIFS; ++vifi, ++v)
{
v->uv_local_pref = default_source_preference;
}
}
return(TRUE);
}
/*
* function name: parse_hello_period
* input: char *s
* output: int
* operation: reads and assigns the hello period for a pim router
* General form:
* 'hello_period <number> <coef>'.
* number is the period in second between 2 hello messages
* and coef is the coef to deterimine the hello holdtime
* default : 3.5
*/
int parse_hello_period(char *s)
{
char *w;
u_int hellop;
float coef;
hellop = PIM_TIMER_HELLO_PERIOD;
coef = 3.5;
if (EQUAL((w = next_word(&s)), ""))
{
log(LOG_WARNING,0,
"Missing hello period ; set to default %u",
hellop);
}
else
{
if (sscanf(w, "%u", &hellop) != 1)
{
hellop = PIM_TIMER_HELLO_PERIOD;
log(LOG_WARNING,0,
"Invalid hello period value '%s' ;set to default %u",
w,hellop);
}
pim_hello_period = hellop;
if (!EQUAL((w=next_word(&s)),""))
{
if (sscanf(w, "%f", &coef) != 1)
{
coef = 3.5;
log(LOG_WARNING,0,
"Invalid hello period coef '%s' ;set to default %.1f",
w,coef);
}
if(coef<=1)
{
coef = 3.5;
log(LOG_WARNING,0,
"for hello period coef must be > 1;set to default %.1f",
coef);
}
}
}
pim_hello_holdtime = coef*pim_hello_period;
return(TRUE);
}
/*
* function name: parse_jp_period
* input: char *s
* output: int
* operation: reads and assigns the join/prune period for a pim router
* General form:
* 'join_prune_period <number> <coef>'.
* number is the period in second between 2 join/prune messages
* and coef is the coef to deterimine the join/prune holdtime
* default : 3.5
* This function is similar to the function above
*/
int parse_jp_period(char *s)
{
char *w;
u_int jpp;
float coef;
jpp = PIM_JOIN_PRUNE_PERIOD;
coef = 3.5;
if (EQUAL((w = next_word(&s)), ""))
{
log(LOG_WARNING,0,
"Missing join/prune period ; set to default %u",
jpp);
}
else
{
if (sscanf(w, "%u", &jpp) != 1)
{
jpp = PIM_JOIN_PRUNE_PERIOD;
log(LOG_WARNING,0,
"Invalid join/prune period value '%s' ;set to default %u",
w,jpp);
}
pim_join_prune_period = jpp;
if (!EQUAL((w=next_word(&s)),""))
{
if (sscanf(w, "%f", &coef) != 1)
{
coef = 3.5;
log(LOG_WARNING,0,
"Invalid join/prune period coef '%s' ;set to default %.1f",
w,coef);
}
if(coef<=1)
{
coef = 3.5;
log(LOG_WARNING,0,
"for join/prune period coef must be > 1;set to default %.1f",
coef);
}
}
}
pim_join_prune_holdtime = coef*pim_join_prune_period;
return(TRUE);
}
/* function name : parse_granularity
* input char *s
* output int
* operation : reads and assigns the granularity of the demon's timer
* General form :
* 'granularity <number>
* number is the period in seconds between each "tics" of the virtual time.
* default : 5 s.
*/
int parse_granularity(char *s)
{
char *w;
u_int granu;
granu = DEFAULT_TIMER_INTERVAL;
if( EQUAL((w= next_word(&s)),""))
{
log(LOG_WARNING,0,
"Missing timer granularity ; set to default %u",
granu);
return FALSE;
}
else
{
if( sscanf(w,"%u",&granu)!=1)
{
granu=DEFAULT_TIMER_INTERVAL;
log(LOG_WARNING,0,
"Invalid timer granularity value '%s' ; set to default %u",
w,granu);
}
timer_interval = granu;
if(granu < 1)
{
granu = DEFAULT_TIMER_INTERVAL;
log(LOG_WARNING,0,
"Timer granularity MUST be > 1! ; set to default %u",
granu);
}
}
timer_interval = granu;
return TRUE;
}
/* function name : parse_data_timeout
* input char *s
* output int
* operation : reads and assigns the data_timeout of each (S,G)
* General form :
* 'data_timeout <number>
* default : 210 s.
*/
int parse_data_timeout(char *s)
{
char *w;
u_int time;
time = PIM_DATA_TIMEOUT;
if( EQUAL((w= next_word(&s)),""))
{
log(LOG_WARNING,0,
"Missing data timeout ; set to default %u",
time);
return FALSE;
}
else
{
if( sscanf(w,"%u",&time)!=1)
{
time=PIM_DATA_TIMEOUT;
log(LOG_WARNING,0,
"Invalid data timeout value '%s' ; set to default %u",
w,time);
}
pim_data_timeout = time;
if(time < 1)
{
time = PIM_DATA_TIMEOUT;
log(LOG_WARNING,0,
"Data timeout must be > 1! ; set to default %u",
time);
}
}
pim_data_timeout = time;
return TRUE;
}
/* function name : parse_register_suppression_timeout
* input char *s
* output int
* operation : reads and assigns the register_suppression_timeout
* General form :
* 'register_suppression_timeout <number>
* default : 60 s.
*/
int parse_register_suppression_timeout(char *s)
{
char *w;
u_int time;
time = PIM_REGISTER_SUPPRESSION_TIMEOUT;
if( EQUAL((w= next_word(&s)),""))
{
log(LOG_WARNING,0,
"Missing register suppression timeout ; set to default %u",
time);
return FALSE;
}
else
{
if( sscanf(w,"%u",&time)!=1)
{
time=PIM_REGISTER_SUPPRESSION_TIMEOUT;
log(LOG_WARNING,0,
"Invalid register suppression timeout value '%s' ; set to default %u",
w,time);
}
pim_register_suppression_timeout = time;
if(time < 1)
{
time = PIM_REGISTER_SUPPRESSION_TIMEOUT;
log(LOG_WARNING,0,
"Register suppression timeout must be > 1! ; set to default %u",
time);
}
}
pim_register_suppression_timeout = time;
return TRUE;
}
/* function name : parse_probe_time
* input char *s
* output int
* operation : reads and assigns the probe_time for null-register
* General form :
* 'probe_time <number>
* default : 5 s.
*/
int parse_probe_time(char *s)
{
char *w;
u_int time;
time = PIM_REGISTER_PROBE_TIME;
if( EQUAL((w= next_word(&s)),""))
{
log(LOG_WARNING,0,
"Missing register probe time ; set to default %u",
time);
return FALSE;
}
else
{
if( sscanf(w,"%u",&time)!=1)
{
time=PIM_REGISTER_PROBE_TIME;
log(LOG_WARNING,0,
"Invalid register probe time value '%s' ; set to default %u",
w,time);
}
pim_register_probe_time = time;
if(time < 1)
{
time = PIM_REGISTER_SUPPRESSION_TIMEOUT;
log(LOG_WARNING,0,
"Register probe time must be > 1! ; set to default %u",
time);
}
}
pim_register_probe_time = time;
return TRUE;
}
/* function name : parse_assert_timeout
* input char *s
* output int
* operation : reads and assigns the assert timeout
* General form :
* 'assert_timeout <number>
* default : 180 s.
*/
int parse_assert_timeout(char *s)
{
char *w;
u_int time;
time = PIM_ASSERT_TIMEOUT;
if( EQUAL((w= next_word(&s)),""))
{
log(LOG_WARNING,0,
"Missing assert time out; set to default %u",
time);
return FALSE;
}
else
{
if( sscanf(w,"%u",&time)!=1)
{
time=PIM_ASSERT_TIMEOUT;
log(LOG_WARNING,0,
"Invalid assert time out value '%s' ; set to default %u",
w,time);
}
pim_assert_timeout = time;
if(time < 1)
{
time = PIM_ASSERT_TIMEOUT;
log(LOG_WARNING,0,
"Assert time out must be > 1! ; set to default %u",
time);
}
}
pim_assert_timeout = time;
return TRUE;
}
char *next_word(char **s)
{
char *w;
w = *s;
while (*w == ' ' || *w == '\t')
w++;
*s = w;
for(;;) {
switch (**s) {
case ' ' :
case '\t' :
**s = '\0';
(*s)++;
return(w);
case '\n' :
case '#' :
**s = '\0';
return(w);
case '\0' :
return(w);
default :
if (isascii(**s) && isupper(**s))
**s = tolower(**s);
(*s)++;
}
}
}
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