irdp_interface.c
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上传日期:2009-11-15
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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 GNU Zebra; see the file COPYING. If not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
- */
- /*
- * This work includes work with the following copywrite:
- *
- * Copyright (C) 1997, 2000 Kunihiro Ishiguro
- *
- */
- /*
- * Thanks to Jens L邋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 "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"
- /* Master of threads. */
- extern struct thread_master *master;
- int in_cksum (void *ptr, int nbytes);
- extern int irdp_sock;
- int irdp_send_thread(struct thread *t_advert);
- char *inet_2a(u_int32_t a, char *b);
- void irdp_advert_off(struct interface *ifp);
- char b1[16], b2[16], b3[16], b4[16]; /* For inet_2a */
- struct prefix *irdp_get_prefix(struct interface *ifp)
- {
- listnode node;
- struct connected *ifc;
-
- if(ifp->connected)
- for (node = listhead (ifp->connected); node; nextnode (node)) {
- ifc = getdata (node);
- return ifc->address;
- }
- return NULL;
- }
- /* Join to the add/leave multicast group. */
- int if_group (struct interface *ifp,
- int sock,
- u_int32_t group,
- int add_leave)
- {
- struct zebra_if *zi;
- struct ip_mreq m;
- struct prefix *p;
- int ret;
- zi = ifp->info;
- bzero (&m, 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),
- strerror (errno));
- return ret;
- }
- int if_add_group (struct interface *ifp)
- {
- struct zebra_if *zi= ifp->info;
- struct irdp_interface *irdp = &zi->irdp;
- int ret;
- ret = if_group (ifp, irdp_sock, INADDR_ALLRTRS_GROUP, IP_ADD_MEMBERSHIP);
- if (ret < 0) {
- return ret;
- }
- if(irdp->flags & IF_DEBUG_MISC )
- zlog_warn("IRDP: Adding group %s for %sn",
- inet_2a(htonl(INADDR_ALLRTRS_GROUP), b1),
- ifp->name);
- return 0;
- }
- int if_drop_group (struct interface *ifp)
- {
- struct zebra_if *zi= ifp->info;
- struct irdp_interface *irdp = &zi->irdp;
- int ret;
- ret = if_group (ifp, irdp_sock, INADDR_ALLRTRS_GROUP, IP_DROP_MEMBERSHIP);
- if (ret < 0)
- return ret;
- if(irdp->flags & IF_DEBUG_MISC)
- zlog_warn("IRDP: Leaving group %s for %sn",
- inet_2a(htonl(INADDR_ALLRTRS_GROUP), b1),
- ifp->name);
- return 0;
- }
- struct interface *get_iflist_ifp(int idx)
- {
- listnode node;
- struct interface *ifp;
- for (node = listhead (iflist); node; nextnode (node)) {
- ifp = getdata (node);
- if(ifp->ifindex == idx) return ifp;
- }
- return NULL;
- }
- 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;
- }
- struct Adv *Adv_new ()
- {
- struct Adv *new;
- new = XMALLOC (MTYPE_TMP, sizeof (struct Adv));
- memset (new, 0, sizeof (struct Adv));
- return new;
- }
- void Adv_free (struct Adv *adv)
- {
- XFREE (MTYPE_TMP, adv);
- }
- void irdp_if_start(struct interface *ifp, int multicast, int set_defaults)
- {
- struct zebra_if *zi= ifp->info;
- struct irdp_interface *irdp = &zi->irdp;
- listnode node;
- u_int32_t timer, seed;
- if (irdp->flags & IF_ACTIVE ) {
- zlog_warn("IRDP: Interface is already active %sn", 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 %sn", 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 %sn", 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 (node = listhead (ifp->connected); node; nextnode (node))
- {
- struct connected *ifc = getdata (node);
- seed = ifc->address->u.prefix4.s_addr;
- }
-
- srandom(seed);
- timer = (random () % IRDP_DEFAULT_INTERVAL) + 1;
- irdp->AdvPrefList = list_new();
- irdp->AdvPrefList->del = (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_warn("IRDP: Init timer for %s set to %un",
- ifp->name,
- timer);
- irdp->t_advertise = thread_add_timer(master,
- irdp_send_thread,
- ifp,
- timer);
- }
- 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 %sn", 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;
- }
- 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 %sn", 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);
- }
- 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 %sn", 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;
- listnode node;
- if(irdp->flags & IF_ACTIVE || irdp->flags & IF_SHUTDOWN) {
- if( irdp->flags & IF_SHUTDOWN)
- vty_out (vty, " ip irdp shutdown %s", VTY_NEWLINE);
- if( irdp->flags & IF_BROADCAST)
- vty_out (vty, " ip irdp broadcast%s", VTY_NEWLINE);
- else
- vty_out (vty, " ip irdp multicast%s", VTY_NEWLINE);
- vty_out (vty, " ip irdp preference %ld%s",
- irdp->Preference, VTY_NEWLINE);
- for (node = listhead (irdp->AdvPrefList); node; nextnode (node)) {
- adv = getdata (node);
- vty_out (vty, " ip irdp address %s preference %d%s",
- inet_2a(adv->ip.s_addr, b1),
- adv->pref,
- VTY_NEWLINE);
- }
- vty_out (vty, " ip irdp holdtime %d%s",
- irdp->Lifetime, VTY_NEWLINE);
- vty_out (vty, " ip irdp minadvertinterval %ld%s",
- irdp->MinAdvertInterval, VTY_NEWLINE);
- vty_out (vty, " ip irdp maxadvertinterval %ld%s",
- irdp->MaxAdvertInterval, VTY_NEWLINE);
- }
- }
- DEFUN (ip_irdp_multicast,
- ip_irdp_multicast_cmd,
- "ip irdp multicast",
- IP_STR
- "ICMP Router discovery on this interface using multicastn")
- {
- struct interface *ifp;
- ifp = (struct interface *) vty->index;
- if(!ifp) {
- return CMD_WARNING;
- }
- 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 using broadcastn")
- {
- struct interface *ifp;
- ifp = (struct interface *) vty->index;
- if(!ifp) {
- return CMD_WARNING;
- }
- irdp_if_start(ifp, FALSE, TRUE);
- return CMD_SUCCESS;
- }
- DEFUN (ip_irdp_no,
- ip_irdp_cmd_no,
- "no ip irdp",
- IP_STR
- "Disable ICMP Router discovery on this interfacen")
- {
- struct interface *ifp;
- ifp = (struct interface *) vty->index;
- if(!ifp) {
- return CMD_WARNING;
- }
- irdp_if_stop(ifp);
- return CMD_SUCCESS;
- }
- DEFUN (ip_irdp_shutdown,
- ip_irdp_shutdown_cmd,
- "ip irdp shutdown",
- IP_STR
- "ICMP Router discovery shutdown on this interfacen")
- {
- struct interface *ifp;
- ifp = (struct interface *) vty->index;
- if(!ifp) {
- return CMD_WARNING;
- }
- irdp_if_shutdown(ifp);
- return CMD_SUCCESS;
- }
- DEFUN (ip_irdp_no_shutdown,
- ip_irdp_no_shutdown_cmd,
- "no ip irdp shutdown",
- IP_STR
- "ICMP Router discovery no shutdown on this interfacen")
- {
- struct interface *ifp;
- ifp = (struct interface *) vty->index;
- if(!ifp) {
- return CMD_WARNING;
- }
- 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 interfacen"
- "Set holdtime valuen"
- "Holdtime value in seconds. Default is 1800 secondsn")
- {
- struct interface *ifp;
- struct zebra_if *zi;
- struct irdp_interface *irdp;
- ifp = (struct interface *) vty->index;
- if(!ifp) {
- return CMD_WARNING;
- }
- zi=ifp->info;
- irdp=&zi->irdp;
- irdp->Lifetime = atoi(argv[0]);
- return CMD_SUCCESS;
- }
- DEFUN (ip_irdp_minadvertinterval,
- ip_irdp_minadvertinterval_cmd,
- "ip irdp minadvertinterval <3-1800>",
- IP_STR
- "ICMP Router discovery on this interfacen"
- "Set minimum time between advertisementn"
- "Minimum advertisement interval in secondsn")
- {
- struct interface *ifp;
- struct zebra_if *zi;
- struct irdp_interface *irdp;
- ifp = (struct interface *) vty->index;
- if(!ifp) {
- return CMD_WARNING;
- }
- zi=ifp->info;
- irdp=&zi->irdp;
- if( atoi(argv[0]) <= irdp->MaxAdvertInterval) {
- irdp->MinAdvertInterval = atoi(argv[0]);
- return CMD_SUCCESS;
- }
- vty_out (vty, "ICMP warning maxadvertinterval is greater or equal than minadvertinterval%s",
- VTY_NEWLINE);
- vty_out (vty, "Please correct!%s",
- VTY_NEWLINE);
- return CMD_WARNING;
- }
- DEFUN (ip_irdp_maxadvertinterval,
- ip_irdp_maxadvertinterval_cmd,
- "ip irdp maxadvertinterval <4-1800>",
- IP_STR
- "ICMP Router discovery on this interfacen"
- "Set maximum time between advertisementn"
- "Maximum advertisement interval in secondsn")
- {
- struct interface *ifp;
- struct zebra_if *zi;
- struct irdp_interface *irdp;
- ifp = (struct interface *) vty->index;
- if(!ifp) {
- return CMD_WARNING;
- }
- zi=ifp->info;
- irdp=&zi->irdp;
- if( irdp->MinAdvertInterval <= atoi(argv[0]) ) {
- irdp->MaxAdvertInterval = atoi(argv[0]);
- return CMD_SUCCESS;
- }
- vty_out (vty, "ICMP warning maxadvertinterval is greater or equal than minadvertinterval%s",
- VTY_NEWLINE);
- vty_out (vty, "Please correct!%s",
- VTY_NEWLINE);
- return CMD_WARNING;
- }
- DEFUN (ip_irdp_preference,
- ip_irdp_preference_cmd,
- /* DEFUN needs to be fixed for negative ranages...
- Be positive for now. :-)
- "ip irdp preference <-2147483648-2147483647>",
- */
- "ip irdp preference <0-2147483647>",
- IP_STR
- "ICMP Router discovery on this interfacen"
- "Set default preference level for this interfacen"
- "Preference leveln")
- {
- struct interface *ifp;
- struct zebra_if *zi;
- struct irdp_interface *irdp;
- ifp = (struct interface *) vty->index;
- if(!ifp) {
- return CMD_WARNING;
- }
- zi=ifp->info;
- irdp=&zi->irdp;
- irdp->Preference = atoi(argv[0]);
- 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 this interfacen"
- "Specify IRDP non-default preference to advertisen"
- "Set IRDP address for advertisen"
- "Preference leveln")
- {
- listnode node;
- struct in_addr ip;
- int pref;
- int ret;
- struct interface *ifp;
- struct zebra_if *zi;
- struct irdp_interface *irdp;
- struct Adv *adv;
- ifp = (struct interface *) vty->index;
- if(!ifp) {
- return CMD_WARNING;
- }
- zi=ifp->info;
- irdp=&zi->irdp;
- ret = inet_aton(argv[0], &ip);
- if(!ret) return CMD_WARNING;
- pref = atoi(argv[1]);
- for (node = listhead (irdp->AdvPrefList); node; nextnode (node)) {
- adv = getdata (node);
- 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 (ip_irdp_address_preference_no,
- ip_irdp_address_preference_cmd_no,
- "no ip irdp address A.B.C.D preference <0-2147483647>",
- IP_STR
- "Alter ICMP Router discovery preference this interfacen"
- "Removes IRDP non-default preferencen"
- "Select IRDP addressn"
- "Old preference leveln")
- {
- listnode node;
- struct in_addr ip;
- int pref;
- int ret;
- struct interface *ifp;
- struct zebra_if *zi;
- struct irdp_interface *irdp;
- struct Adv *adv;
- ifp = (struct interface *) vty->index;
- if(!ifp) {
- return CMD_WARNING;
- }
- zi=ifp->info;
- irdp=&zi->irdp;
- ret = inet_aton(argv[0], &ip);
- if(!ret) return CMD_WARNING;
- pref = atoi(argv[1]);
- for (node = listhead (irdp->AdvPrefList); node; nextnode (node)) {
- adv = getdata (node);
- 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")
- {
- struct interface *ifp;
- struct zebra_if *zi;
- struct irdp_interface *irdp;
- ifp = (struct interface *) vty->index;
- if(!ifp) {
- return CMD_WARNING;
- }
- 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")
- {
- struct interface *ifp;
- struct zebra_if *zi;
- struct irdp_interface *irdp;
- ifp = (struct interface *) vty->index;
- if(!ifp) {
- return CMD_WARNING;
- }
- 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")
- {
- struct interface *ifp;
- struct zebra_if *zi;
- struct irdp_interface *irdp;
- ifp = (struct interface *) vty->index;
- if(!ifp) {
- return CMD_WARNING;
- }
- 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")
- {
- struct interface *ifp;
- struct zebra_if *zi;
- struct irdp_interface *irdp;
- ifp = (struct interface *) vty->index;
- if(!ifp) {
- return CMD_WARNING;
- }
- 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_if_init ()
- {
- install_element (INTERFACE_NODE, &ip_irdp_broadcast_cmd);
- install_element (INTERFACE_NODE, &ip_irdp_multicast_cmd);
- install_element (INTERFACE_NODE, &ip_irdp_cmd_no);
- install_element (INTERFACE_NODE, &ip_irdp_shutdown_cmd);
- install_element (INTERFACE_NODE, &ip_irdp_no_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, &ip_irdp_address_preference_cmd_no);
- 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 */