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|
/*
*
* Copyright (C) 2000 Robert Olsson.
* Swedish University of Agricultural Sciences
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* GNU Zebra is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* This work includes work with the following copywrite:
*
* Copyright (C) 1997, 2000 Kunihiro Ishiguro
*
*/
/*
* Thanks to Jens L��s at Swedish University of Agricultural Sciences
* for reviewing and tests.
*/
#include <zebra.h>
#ifdef HAVE_IRDP
#include "if.h"
#include "vty.h"
#include "sockunion.h"
#include "prefix.h"
#include "command.h"
#include "memory.h"
#include "zebra_memory.h"
#include "stream.h"
#include "ioctl.h"
#include "connected.h"
#include "log.h"
#include "zclient.h"
#include "thread.h"
#include "zebra/interface.h"
#include "zebra/rtadv.h"
#include "zebra/rib.h"
#include "zebra/zserv.h"
#include "zebra/redistribute.h"
#include "zebra/irdp.h"
#include <netinet/ip_icmp.h>
#include "if.h"
#include "sockunion.h"
#include "log.h"
extern int irdp_sock;
static const char *
inet_2a(u_int32_t a, char *b)
{
sprintf(b, "%u.%u.%u.%u",
(a ) & 0xFF,
(a>> 8) & 0xFF,
(a>>16) & 0xFF,
(a>>24) & 0xFF);
return b;
}
static struct prefix *
irdp_get_prefix(struct interface *ifp)
{
struct listnode *node;
struct connected *ifc;
if (ifp->connected)
for (ALL_LIST_ELEMENTS_RO (ifp->connected, node, ifc))
return ifc->address;
return NULL;
}
/* Join to the add/leave multicast group. */
static int
if_group (struct interface *ifp,
int sock,
u_int32_t group,
int add_leave)
{
struct ip_mreq m;
struct prefix *p;
int ret;
char b1[INET_ADDRSTRLEN];
memset (&m, 0, sizeof (m));
m.imr_multiaddr.s_addr = htonl (group);
p = irdp_get_prefix(ifp);
if(!p) {
zlog_warn ("IRDP: can't get address for %s", ifp->name);
return 1;
}
m.imr_interface = p->u.prefix4;
ret = setsockopt (sock, IPPROTO_IP, add_leave,
(char *) &m, sizeof (struct ip_mreq));
if (ret < 0)
zlog_warn ("IRDP: %s can't setsockopt %s: %s",
add_leave == IP_ADD_MEMBERSHIP? "join group":"leave group",
inet_2a(group, b1),
safe_strerror (errno));
return ret;
}
static int
if_add_group (struct interface *ifp)
{
struct zebra_if *zi= ifp->info;
struct irdp_interface *irdp = &zi->irdp;
int ret;
char b1[INET_ADDRSTRLEN];
ret = if_group (ifp, irdp_sock, INADDR_ALLRTRS_GROUP, IP_ADD_MEMBERSHIP);
if (ret < 0) {
return ret;
}
if(irdp->flags & IF_DEBUG_MISC )
zlog_debug("IRDP: Adding group %s for %s",
inet_2a(htonl(INADDR_ALLRTRS_GROUP), b1),
ifp->name);
return 0;
}
static int
if_drop_group (struct interface *ifp)
{
struct zebra_if *zi= ifp->info;
struct irdp_interface *irdp = &zi->irdp;
int ret;
char b1[INET_ADDRSTRLEN];
ret = if_group (ifp, irdp_sock, INADDR_ALLRTRS_GROUP, IP_DROP_MEMBERSHIP);
if (ret < 0)
return ret;
if(irdp->flags & IF_DEBUG_MISC)
zlog_debug("IRDP: Leaving group %s for %s",
inet_2a(htonl(INADDR_ALLRTRS_GROUP), b1),
ifp->name);
return 0;
}
static void
if_set_defaults(struct interface *ifp)
{
struct zebra_if *zi=ifp->info;
struct irdp_interface *irdp=&zi->irdp;
irdp->MaxAdvertInterval = IRDP_MAXADVERTINTERVAL;
irdp->MinAdvertInterval = IRDP_MINADVERTINTERVAL;
irdp->Preference = IRDP_PREFERENCE;
irdp->Lifetime = IRDP_LIFETIME;
}
static struct Adv *Adv_new (void)
{
return XCALLOC (MTYPE_TMP, sizeof (struct Adv));
}
static void
Adv_free (struct Adv *adv)
{
XFREE (MTYPE_TMP, adv);
}
static void
irdp_if_start(struct interface *ifp, int multicast, int set_defaults)
{
struct zebra_if *zi= ifp->info;
struct irdp_interface *irdp = &zi->irdp;
struct listnode *node;
struct connected *ifc;
u_int32_t timer, seed;
if (irdp->flags & IF_ACTIVE ) {
zlog_warn("IRDP: Interface is already active %s", ifp->name);
return;
}
if ((irdp_sock < 0) && ((irdp_sock = irdp_sock_init()) < 0)) {
zlog_warn("IRDP: Cannot activate interface %s (cannot create "
"IRDP socket)", ifp->name);
return;
}
irdp->flags |= IF_ACTIVE;
if(!multicast)
irdp->flags |= IF_BROADCAST;
if_add_update(ifp);
if (! (ifp->flags & IFF_UP)) {
zlog_warn("IRDP: Interface is down %s", ifp->name);
}
/* Shall we cancel if_start if if_add_group fails? */
if( multicast) {
if_add_group(ifp);
if (! (ifp->flags & (IFF_MULTICAST|IFF_ALLMULTI))) {
zlog_warn("IRDP: Interface not multicast enabled %s", ifp->name);
}
}
if(set_defaults)
if_set_defaults(ifp);
irdp->irdp_sent = 0;
/* The spec suggests this for randomness */
seed = 0;
if( ifp->connected)
for (ALL_LIST_ELEMENTS_RO (ifp->connected, node, ifc))
{
seed = ifc->address->u.prefix4.s_addr;
break;
}
srandom(seed);
timer = (random () % IRDP_DEFAULT_INTERVAL) + 1;
irdp->AdvPrefList = list_new();
irdp->AdvPrefList->del = (void (*)(void *)) Adv_free; /* Destructor */
/* And this for startup. Speed limit from 1991 :-). But it's OK*/
if(irdp->irdp_sent < MAX_INITIAL_ADVERTISEMENTS &&
timer > MAX_INITIAL_ADVERT_INTERVAL )
timer= MAX_INITIAL_ADVERT_INTERVAL;
if(irdp->flags & IF_DEBUG_MISC)
zlog_debug("IRDP: Init timer for %s set to %u",
ifp->name,
timer);
irdp->t_advertise = NULL;
thread_add_timer(zebrad.master, irdp_send_thread, ifp, timer,
&irdp->t_advertise);
}
static void
irdp_if_stop(struct interface *ifp)
{
struct zebra_if *zi=ifp->info;
struct irdp_interface *irdp=&zi->irdp;
if (irdp == NULL) {
zlog_warn ("Interface %s structure is NULL", ifp->name);
return;
}
if (! (irdp->flags & IF_ACTIVE )) {
zlog_warn("Interface is not active %s", ifp->name);
return;
}
if(! (irdp->flags & IF_BROADCAST))
if_drop_group(ifp);
irdp_advert_off(ifp);
list_delete(irdp->AdvPrefList);
irdp->AdvPrefList=NULL;
irdp->flags = 0;
}
static void
irdp_if_shutdown(struct interface *ifp)
{
struct zebra_if *zi= ifp->info;
struct irdp_interface *irdp = &zi->irdp;
if (irdp->flags & IF_SHUTDOWN ) {
zlog_warn("IRDP: Interface is already shutdown %s", ifp->name);
return;
}
irdp->flags |= IF_SHUTDOWN;
irdp->flags &= ~IF_ACTIVE;
if(! (irdp->flags & IF_BROADCAST))
if_drop_group(ifp);
/* Tell the hosts we are out of service */
irdp_advert_off(ifp);
}
static void
irdp_if_no_shutdown(struct interface *ifp)
{
struct zebra_if *zi= ifp->info;
struct irdp_interface *irdp = &zi->irdp;
if (! (irdp->flags & IF_SHUTDOWN )) {
zlog_warn("IRDP: Interface is not shutdown %s", ifp->name);
return;
}
irdp->flags &= ~IF_SHUTDOWN;
irdp_if_start(ifp, irdp->flags & IF_BROADCAST? FALSE : TRUE, FALSE);
}
/* Write configuration to user */
void irdp_config_write (struct vty *vty, struct interface *ifp)
{
struct zebra_if *zi=ifp->info;
struct irdp_interface *irdp=&zi->irdp;
struct Adv *adv;
struct listnode *node;
char b1[INET_ADDRSTRLEN];
if(irdp->flags & IF_ACTIVE || irdp->flags & IF_SHUTDOWN) {
if( irdp->flags & IF_SHUTDOWN)
vty_out (vty, " ip irdp shutdown \n");
if( irdp->flags & IF_BROADCAST)
vty_out (vty, " ip irdp broadcast\n");
else
vty_out (vty, " ip irdp multicast\n");
vty_out (vty, " ip irdp preference %ld\n",
irdp->Preference);
for (ALL_LIST_ELEMENTS_RO (irdp->AdvPrefList, node, adv))
vty_out (vty, " ip irdp address %s preference %d\n",
inet_2a(adv->ip.s_addr, b1),
adv->pref);
vty_out (vty, " ip irdp holdtime %d\n",
irdp->Lifetime);
vty_out (vty, " ip irdp minadvertinterval %ld\n",
irdp->MinAdvertInterval);
vty_out (vty, " ip irdp maxadvertinterval %ld\n",
irdp->MaxAdvertInterval);
}
}
DEFUN (ip_irdp_multicast,
ip_irdp_multicast_cmd,
"ip irdp multicast",
IP_STR
"ICMP Router discovery on this interface\n"
"Use multicast mode\n")
{
VTY_DECLVAR_CONTEXT (interface, ifp);
irdp_if_start(ifp, TRUE, TRUE);
return CMD_SUCCESS;
}
DEFUN (ip_irdp_broadcast,
ip_irdp_broadcast_cmd,
"ip irdp broadcast",
IP_STR
"ICMP Router discovery on this interface\n"
"Use broadcast mode\n")
{
VTY_DECLVAR_CONTEXT (interface, ifp);
irdp_if_start(ifp, FALSE, TRUE);
return CMD_SUCCESS;
}
DEFUN (no_ip_irdp,
no_ip_irdp_cmd,
"no ip irdp",
NO_STR
IP_STR
"Disable ICMP Router discovery on this interface\n")
{
VTY_DECLVAR_CONTEXT (interface, ifp);
irdp_if_stop(ifp);
return CMD_SUCCESS;
}
DEFUN (ip_irdp_shutdown,
ip_irdp_shutdown_cmd,
"ip irdp shutdown",
IP_STR
"ICMP Router discovery on this interface\n"
"ICMP Router discovery shutdown on this interface\n")
{
VTY_DECLVAR_CONTEXT (interface, ifp);
irdp_if_shutdown(ifp);
return CMD_SUCCESS;
}
DEFUN (no_ip_irdp_shutdown,
no_ip_irdp_shutdown_cmd,
"no ip irdp shutdown",
NO_STR
IP_STR
"ICMP Router discovery on this interface\n"
"ICMP Router discovery no shutdown on this interface\n")
{
VTY_DECLVAR_CONTEXT (interface, ifp);
irdp_if_no_shutdown(ifp);
return CMD_SUCCESS;
}
DEFUN (ip_irdp_holdtime,
ip_irdp_holdtime_cmd,
"ip irdp holdtime (0-9000)",
IP_STR
"ICMP Router discovery on this interface\n"
"Set holdtime value\n"
"Holdtime value in seconds. Default is 1800 seconds\n")
{
int idx_number = 3;
VTY_DECLVAR_CONTEXT (interface, ifp);
struct zebra_if *zi;
struct irdp_interface *irdp;
zi=ifp->info;
irdp=&zi->irdp;
irdp->Lifetime = atoi(argv[idx_number]->arg);
return CMD_SUCCESS;
}
DEFUN (ip_irdp_minadvertinterval,
ip_irdp_minadvertinterval_cmd,
"ip irdp minadvertinterval (3-1800)",
IP_STR
"ICMP Router discovery on this interface\n"
"Set minimum time between advertisement\n"
"Minimum advertisement interval in seconds\n")
{
int idx_number = 3;
VTY_DECLVAR_CONTEXT (interface, ifp);
struct zebra_if *zi;
struct irdp_interface *irdp;
zi=ifp->info;
irdp=&zi->irdp;
if((unsigned) atoi(argv[idx_number]->arg) <= irdp->MaxAdvertInterval) {
irdp->MinAdvertInterval = atoi(argv[idx_number]->arg);
return CMD_SUCCESS;
}
else {
vty_outln (vty, "%% MinAdvertInterval must be less than or equal to "
"MaxAdvertInterval");
return CMD_WARNING;
}
}
DEFUN (ip_irdp_maxadvertinterval,
ip_irdp_maxadvertinterval_cmd,
"ip irdp maxadvertinterval (4-1800)",
IP_STR
"ICMP Router discovery on this interface\n"
"Set maximum time between advertisement\n"
"Maximum advertisement interval in seconds\n")
{
int idx_number = 3;
VTY_DECLVAR_CONTEXT (interface, ifp);
struct zebra_if *zi;
struct irdp_interface *irdp;
zi=ifp->info;
irdp=&zi->irdp;
if(irdp->MinAdvertInterval <= (unsigned) atoi(argv[idx_number]->arg)) {
irdp->MaxAdvertInterval = atoi(argv[idx_number]->arg);
return CMD_SUCCESS;
}
else {
vty_outln (vty, "%% MaxAdvertInterval must be greater than or equal to "
"MinAdvertInterval");
return CMD_WARNING;
}
}
/* DEFUN needs to be fixed for negative ranages...
* "ip irdp preference <-2147483648-2147483647>",
* Be positive for now. :-)
*/
DEFUN (ip_irdp_preference,
ip_irdp_preference_cmd,
"ip irdp preference (0-2147483647)",
IP_STR
"ICMP Router discovery on this interface\n"
"Set default preference level for this interface\n"
"Preference level\n")
{
int idx_number = 3;
VTY_DECLVAR_CONTEXT (interface, ifp);
struct zebra_if *zi;
struct irdp_interface *irdp;
zi=ifp->info;
irdp=&zi->irdp;
irdp->Preference = atoi(argv[idx_number]->arg);
return CMD_SUCCESS;
}
DEFUN (ip_irdp_address_preference,
ip_irdp_address_preference_cmd,
"ip irdp address A.B.C.D preference (0-2147483647)",
IP_STR
"Alter ICMP Router discovery preference on this interface\n"
"Set IRDP address for advertise\n"
"IPv4 address\n"
"Specify IRDP non-default preference to advertise\n"
"Preference level\n")
{
int idx_ipv4 = 3;
int idx_number = 5;
VTY_DECLVAR_CONTEXT (interface, ifp);
struct listnode *node;
struct in_addr ip;
int pref;
int ret;
struct zebra_if *zi;
struct irdp_interface *irdp;
struct Adv *adv;
zi=ifp->info;
irdp=&zi->irdp;
ret = inet_aton(argv[idx_ipv4]->arg, &ip);
if(!ret) return CMD_WARNING;
pref = atoi(argv[idx_number]->arg);
for (ALL_LIST_ELEMENTS_RO (irdp->AdvPrefList, node, adv))
if(adv->ip.s_addr == ip.s_addr)
return CMD_SUCCESS;
adv = Adv_new();
adv->ip = ip;
adv->pref = pref;
listnode_add(irdp->AdvPrefList, adv);
return CMD_SUCCESS;
}
DEFUN (no_ip_irdp_address_preference,
no_ip_irdp_address_preference_cmd,
"no ip irdp address A.B.C.D preference (0-2147483647)",
NO_STR
IP_STR
"Alter ICMP Router discovery preference on this interface\n"
"Select IRDP address\n"
"IPv4 address\n"
"Reset ICMP Router discovery preference on this interface\n"
"Old preference level\n")
{
int idx_ipv4 = 4;
VTY_DECLVAR_CONTEXT (interface, ifp);
struct listnode *node, *nnode;
struct in_addr ip;
int ret;
struct zebra_if *zi;
struct irdp_interface *irdp;
struct Adv *adv;
zi=ifp->info;
irdp=&zi->irdp;
ret = inet_aton(argv[idx_ipv4]->arg, &ip);
if (!ret)
return CMD_WARNING;
for (ALL_LIST_ELEMENTS (irdp->AdvPrefList, node, nnode, adv))
{
if(adv->ip.s_addr == ip.s_addr )
{
listnode_delete(irdp->AdvPrefList, adv);
break;
}
}
return CMD_SUCCESS;
}
DEFUN (ip_irdp_debug_messages,
ip_irdp_debug_messages_cmd,
"ip irdp debug messages",
IP_STR
"ICMP Router discovery debug Averts. and Solicits (short)\n"
"IRDP debugging options\n"
"Enable debugging for IRDP messages\n")
{
VTY_DECLVAR_CONTEXT (interface, ifp);
struct zebra_if *zi;
struct irdp_interface *irdp;
zi=ifp->info;
irdp=&zi->irdp;
irdp->flags |= IF_DEBUG_MESSAGES;
return CMD_SUCCESS;
}
DEFUN (ip_irdp_debug_misc,
ip_irdp_debug_misc_cmd,
"ip irdp debug misc",
IP_STR
"ICMP Router discovery debug Averts. and Solicits (short)\n"
"IRDP debugging options\n"
"Enable debugging for miscellaneous IRDP events\n")
{
VTY_DECLVAR_CONTEXT (interface, ifp);
struct zebra_if *zi;
struct irdp_interface *irdp;
zi=ifp->info;
irdp=&zi->irdp;
irdp->flags |= IF_DEBUG_MISC;
return CMD_SUCCESS;
}
DEFUN (ip_irdp_debug_packet,
ip_irdp_debug_packet_cmd,
"ip irdp debug packet",
IP_STR
"ICMP Router discovery debug Averts. and Solicits (short)\n"
"IRDP debugging options\n"
"Enable debugging for IRDP packets\n")
{
VTY_DECLVAR_CONTEXT (interface, ifp);
struct zebra_if *zi;
struct irdp_interface *irdp;
zi=ifp->info;
irdp=&zi->irdp;
irdp->flags |= IF_DEBUG_PACKET;
return CMD_SUCCESS;
}
DEFUN (ip_irdp_debug_disable,
ip_irdp_debug_disable_cmd,
"ip irdp debug disable",
IP_STR
"ICMP Router discovery debug Averts. and Solicits (short)\n"
"IRDP debugging options\n"
"Disable debugging for all IRDP events\n")
{
VTY_DECLVAR_CONTEXT (interface, ifp);
struct zebra_if *zi;
struct irdp_interface *irdp;
zi=ifp->info;
irdp=&zi->irdp;
irdp->flags &= ~IF_DEBUG_PACKET;
irdp->flags &= ~IF_DEBUG_MESSAGES;
irdp->flags &= ~IF_DEBUG_MISC;
return CMD_SUCCESS;
}
void
irdp_init ()
{
install_element (INTERFACE_NODE, &ip_irdp_broadcast_cmd);
install_element (INTERFACE_NODE, &ip_irdp_multicast_cmd);
install_element (INTERFACE_NODE, &no_ip_irdp_cmd);
install_element (INTERFACE_NODE, &ip_irdp_shutdown_cmd);
install_element (INTERFACE_NODE, &no_ip_irdp_shutdown_cmd);
install_element (INTERFACE_NODE, &ip_irdp_holdtime_cmd);
install_element (INTERFACE_NODE, &ip_irdp_maxadvertinterval_cmd);
install_element (INTERFACE_NODE, &ip_irdp_minadvertinterval_cmd);
install_element (INTERFACE_NODE, &ip_irdp_preference_cmd);
install_element (INTERFACE_NODE, &ip_irdp_address_preference_cmd);
install_element (INTERFACE_NODE, &no_ip_irdp_address_preference_cmd);
install_element (INTERFACE_NODE, &ip_irdp_debug_messages_cmd);
install_element (INTERFACE_NODE, &ip_irdp_debug_misc_cmd);
install_element (INTERFACE_NODE, &ip_irdp_debug_packet_cmd);
install_element (INTERFACE_NODE, &ip_irdp_debug_disable_cmd);
}
#endif /* HAVE_IRDP */
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