787 lines
20 KiB
C
787 lines
20 KiB
C
/*
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* The mrouted program is covered by the license in the accompanying file
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* named "LICENSE". Use of the mrouted program represents acceptance of
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* the terms and conditions listed in that file.
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*
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* The mrouted program is COPYRIGHT 1989 by The Board of Trustees of
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* Leland Stanford Junior University.
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*
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*
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* from: Id: vif.c,v 1.5 1993/06/24 05:11:16 deering Exp
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* $Id: vif.c,v 1.3 1994/06/09 16:04:03 brezak Exp $
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*/
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#ifndef lint
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static char rcsid[] = "$Id: vif.c,v 1.3 1994/06/09 16:04:03 brezak Exp $";
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#endif
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#include "defs.h"
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/*
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* Exported variables.
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*/
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struct uvif uvifs[MAXVIFS]; /* array of virtual interfaces */
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vifi_t numvifs; /* number of vifs in use */
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int vifs_down; /* 1=>some interfaces are down */
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int udp_socket; /* Since the honkin' kernel doesn't support */
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/* ioctls on raw IP sockets, we need a UDP */
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/* socket as well as our IGMP (raw) socket. */
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/* How dumb. */
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/*
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* Forward declarations.
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*/
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static void start_vif();
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static void stop_vif();
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/*
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* Initialize the virtual interfaces.
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*/
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void init_vifs()
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{
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vifi_t vifi;
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struct uvif *v;
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int enabled_vifs, enabled_phyints;
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numvifs = 0;
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vifs_down = FALSE;
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/*
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* Configure the vifs based on the interface configuration of the
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* the kernel and the contents of the configuration file.
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* (Open a UDP socket for ioctl use in the config procedures.)
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*/
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if ((udp_socket = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
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log(LOG_ERR, errno, "UDP socket");
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config_vifs_from_kernel();
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config_vifs_from_file();
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/*
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* Quit if there are fewer than two enabled vifs.
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*/
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enabled_vifs = 0;
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enabled_phyints = 0;
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for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
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if (!(v->uv_flags & VIFF_DISABLED)) {
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++enabled_vifs;
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if (!(v->uv_flags & VIFF_TUNNEL))
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++enabled_phyints;
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}
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}
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if (enabled_vifs < 2)
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log(LOG_ERR, 0, "can't forward: %s",
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enabled_vifs == 0 ? "no enabled vifs" : "only one enabled vif");
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if (enabled_phyints == 0)
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log(LOG_WARNING, 0,
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"no enabled interfaces, forwarding via tunnels only");
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/*
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* Start routing on all virtual interfaces that are not down or
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* administratively disabled.
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*/
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for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
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if (!(v->uv_flags & VIFF_DISABLED)) {
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if (!(v->uv_flags & VIFF_DOWN))
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start_vif(vifi);
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else log(LOG_INFO, 0,
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"%s is not yet up; vif #%u not in service",
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v->uv_name, vifi);
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}
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}
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}
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/*
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* See if any interfaces have changed from up state to down, or vice versa,
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* including any non-multicast-capable interfaces that are in use as local
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* tunnel end-points. Ignore interfaces that have been administratively
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* disabled.
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*/
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void check_vif_state()
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{
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register vifi_t vifi;
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register struct uvif *v;
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struct ifreq ifr;
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vifs_down = FALSE;
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for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
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if (v->uv_flags & VIFF_DISABLED) continue;
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strncpy(ifr.ifr_name, v->uv_name, IFNAMSIZ);
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if (ioctl(udp_socket, SIOCGIFFLAGS, (char *)&ifr) < 0)
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log(LOG_ERR, errno,
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"ioctl SIOCGIFFLAGS for %s", ifr.ifr_name);
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if (v->uv_flags & VIFF_DOWN) {
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if (ifr.ifr_flags & IFF_UP) {
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v->uv_flags &= ~VIFF_DOWN;
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start_vif(vifi);
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log(LOG_INFO, 0,
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"%s has come up; vif #%u now in service",
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v->uv_name, vifi);
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}
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else vifs_down = TRUE;
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}
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else {
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if (!(ifr.ifr_flags & IFF_UP)) {
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stop_vif(vifi);
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v->uv_flags |= VIFF_DOWN;
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log(LOG_INFO, 0,
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"%s has gone down; vif #%u taken out of service",
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v->uv_name, vifi);
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vifs_down = TRUE;
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}
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}
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}
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}
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/*
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* Start routing on the specified virtual interface.
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*/
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static void start_vif(vifi)
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vifi_t vifi;
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{
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struct uvif *v;
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u_long src, dst;
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v = &uvifs[vifi];
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src = v->uv_lcl_addr;
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dst = (v->uv_flags & VIFF_TUNNEL) ? v->uv_rmt_addr : dvmrp_group;
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/*
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* Install the interface in the kernel's vif structure.
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*/
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k_add_vif(vifi, &uvifs[vifi]);
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/*
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* Update the existing route entries to take into account the new vif.
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*/
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add_vif_to_routes(vifi);
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if (!(v->uv_flags & VIFF_TUNNEL)) {
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/*
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* Join the DVMRP multicast group on the interface.
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* (This is not strictly necessary, since the kernel promiscuously
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* receives IGMP packets addressed to ANY IP multicast group while
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* multicast routing is enabled. However, joining the group allows
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* this host to receive non-IGMP packets as well, such as 'pings'.)
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*/
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k_join(dvmrp_group, src);
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/*
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* Install an entry in the routing table for the subnet to which
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* the interface is connected.
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*/
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start_route_updates();
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update_route(v->uv_subnet, v->uv_subnetmask, 0, 0, vifi);
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/*
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* Until neighbors are discovered, assume responsibility for sending
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* periodic group membership queries to the subnet. Send the first
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* query.
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*/
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v->uv_flags |= VIFF_QUERIER;
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send_igmp(src, allhosts_group, IGMP_HOST_MEMBERSHIP_QUERY, 0, 0, 0);
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}
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/*
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* Send a probe via the new vif to look for neighbors.
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*/
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send_igmp(src, dst, IGMP_DVMRP, DVMRP_PROBE, htonl(MROUTED_LEVEL), 0);
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}
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/*
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* Stop routing on the specified virtual interface.
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*/
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static void stop_vif(vifi)
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vifi_t vifi;
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{
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struct uvif *v;
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struct listaddr *a;
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v = &uvifs[vifi];
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if (!(v->uv_flags & VIFF_TUNNEL)) {
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/*
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* Depart from the DVMRP multicast group on the interface.
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*/
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k_leave(dvmrp_group, v->uv_lcl_addr);
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/*
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* Update the entry in the routing table for the subnet to which
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* the interface is connected, to take into account the interface
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* failure.
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*/
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start_route_updates();
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update_route(v->uv_subnet, v->uv_subnetmask, UNREACHABLE, 0, vifi);
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/*
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* Discard all group addresses. (No need to tell kernel;
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* the k_del_vif() call, below, will clean up kernel state.)
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*/
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while (v->uv_groups != NULL) {
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a = v->uv_groups;
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v->uv_groups = a->al_next;
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free((char *)a);
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}
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v->uv_flags &= ~VIFF_QUERIER;
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}
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/*
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* Update the existing route entries to take into account the vif failure.
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*/
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delete_vif_from_routes(vifi);
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/*
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* Delete the interface from the kernel's vif structure.
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*/
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k_del_vif(vifi);
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/*
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* Discard all neighbor addresses.
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*/
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while (v->uv_neighbors != NULL) {
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a = v->uv_neighbors;
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v->uv_neighbors = a->al_next;
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free((char *)a);
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}
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}
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/*
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* Find the virtual interface from which an incoming packet arrived,
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* based on the packet's source and destination IP addresses.
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*/
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vifi_t find_vif(src, dst)
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register u_long src;
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register u_long dst;
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{
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register vifi_t vifi;
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register struct uvif *v;
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for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
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if (!(v->uv_flags & (VIFF_DOWN|VIFF_DISABLED))) {
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if (v->uv_flags & VIFF_TUNNEL) {
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if (src == v->uv_rmt_addr && dst == v->uv_lcl_addr)
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return(vifi);
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}
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else {
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if ((src & v->uv_subnetmask) == v->uv_subnet &&
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src != v->uv_subnetbcast)
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return(vifi);
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}
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}
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}
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return (NO_VIF);
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}
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/*
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* Send group membership queries to all subnets for which I am querier.
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*/
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void query_groups()
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{
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register vifi_t vifi;
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register struct uvif *v;
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for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++) {
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if (v->uv_flags & VIFF_QUERIER) {
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send_igmp(v->uv_lcl_addr, allhosts_group,
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IGMP_HOST_MEMBERSHIP_QUERY, 0, 0, 0);
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}
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}
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}
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/*
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* Process an incoming group membership report.
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*/
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void accept_group_report(src, dst, group)
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u_long src, dst, group;
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{
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register vifi_t vifi;
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register struct uvif *v;
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register struct listaddr *g;
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if ((vifi = find_vif(src, dst)) == NO_VIF ||
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(uvifs[vifi].uv_flags & VIFF_TUNNEL)) {
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log(LOG_INFO, 0,
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"ignoring group membership report from non-adjacent host %s",
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inet_fmt(src, s1));
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return;
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}
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v = &uvifs[vifi];
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/*
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* Look for the group in our group list; if found, reset its timer.
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*/
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for (g = v->uv_groups; g != NULL; g = g->al_next) {
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if (group == g->al_addr) {
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g->al_timer = 0;
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break;
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}
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}
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/*
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* If not found, add it to the list and tell the kernel.
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*/
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if (g == NULL) {
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g = (struct listaddr *)malloc(sizeof(struct listaddr));
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if (g == NULL)
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log(LOG_ERR, 0, "ran out of memory"); /* fatal */
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g->al_addr = group;
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g->al_timer = 0;
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g->al_next = v->uv_groups;
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v->uv_groups = g;
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k_add_group(vifi, group);
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}
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}
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/*
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* Send a probe on all vifs from which no neighbors have been heard recently.
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*/
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void probe_for_neighbors()
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{
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register vifi_t vifi;
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register struct uvif *v;
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for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++) {
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if (!(v->uv_flags & (VIFF_DOWN|VIFF_DISABLED)) &&
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v->uv_neighbors == NULL) {
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send_igmp(v->uv_lcl_addr,
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(v->uv_flags & VIFF_TUNNEL) ? v->uv_rmt_addr
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: dvmrp_group,
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IGMP_DVMRP, DVMRP_PROBE, htonl(MROUTED_LEVEL), 0);
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}
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}
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}
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/*
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* Send a list of all of our neighbors to the requestor, `src'.
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*/
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void accept_neighbor_request(src, dst)
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u_long src, dst;
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{
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vifi_t vifi;
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struct uvif *v;
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u_char *p, *ncount;
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struct listaddr *la;
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int datalen;
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u_long temp_addr, us, them = src;
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/* Determine which of our addresses to use as the source of our response
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* to this query.
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*/
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if (IN_MULTICAST(ntohl(dst))) { /* query sent to a multicast group */
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int udp; /* find best interface to reply on */
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struct sockaddr_in addr;
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int addrlen = sizeof(addr);
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addr.sin_family = AF_INET;
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addr.sin_addr.s_addr = dst;
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addr.sin_port = htons(2000); /* any port over 1024 will do... */
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if ((udp = socket(AF_INET, SOCK_DGRAM, 0)) < 0
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|| connect(udp, (struct sockaddr *) &addr, sizeof(addr)) < 0
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|| getsockname(udp, (struct sockaddr *) &addr, &addrlen) < 0) {
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log(LOG_WARNING, errno, "Determining local address");
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close(udp);
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return;
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}
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close(udp);
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us = addr.sin_addr.s_addr;
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} else /* query sent to us alone */
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us = dst;
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#define PUT_ADDR(a) temp_addr = ntohl(a); \
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*p++ = temp_addr >> 24; \
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*p++ = (temp_addr >> 16) & 0xFF; \
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*p++ = (temp_addr >> 8) & 0xFF; \
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*p++ = temp_addr & 0xFF;
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p = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
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datalen = 0;
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for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++) {
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if (v->uv_flags & VIFF_DISABLED)
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continue;
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ncount = 0;
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for (la = v->uv_neighbors; la; la = la->al_next) {
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/* Make sure that there's room for this neighbor... */
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if (datalen + (ncount == 0 ? 4 + 3 + 4 : 4) > MAX_DVMRP_DATA_LEN) {
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send_igmp(us, them, IGMP_DVMRP, DVMRP_NEIGHBORS,
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htonl(MROUTED_LEVEL), datalen);
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p = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
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datalen = 0;
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ncount = 0;
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}
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/* Put out the header for this neighbor list... */
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if (ncount == 0) {
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PUT_ADDR(v->uv_lcl_addr);
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*p++ = v->uv_metric;
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*p++ = v->uv_threshold;
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ncount = p;
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*p++ = 0;
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datalen += 4 + 3;
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}
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PUT_ADDR(la->al_addr);
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datalen += 4;
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(*ncount)++;
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}
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}
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if (datalen != 0)
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send_igmp(us, them, IGMP_DVMRP, DVMRP_NEIGHBORS, htonl(MROUTED_LEVEL),
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datalen);
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}
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/*
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* Send a list of all of our neighbors to the requestor, `src'.
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*/
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void accept_neighbor_request2(src, dst)
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u_long src, dst;
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{
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vifi_t vifi;
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struct uvif *v;
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u_char *p, *ncount;
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struct listaddr *la;
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int datalen;
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u_long temp_addr, us, them = src;
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/* Determine which of our addresses to use as the source of our response
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* to this query.
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*/
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if (IN_MULTICAST(ntohl(dst))) { /* query sent to a multicast group */
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int udp; /* find best interface to reply on */
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struct sockaddr_in addr;
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int addrlen = sizeof(addr);
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addr.sin_family = AF_INET;
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addr.sin_addr.s_addr = dst;
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addr.sin_port = htons(2000); /* any port over 1024 will do... */
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if ((udp = socket(AF_INET, SOCK_DGRAM, 0)) < 0
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|| connect(udp, (struct sockaddr *) &addr, sizeof(addr)) < 0
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|| getsockname(udp, (struct sockaddr *) &addr, &addrlen) < 0) {
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log(LOG_WARNING, errno, "Determining local address");
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close(udp);
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return;
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}
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close(udp);
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us = addr.sin_addr.s_addr;
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} else /* query sent to us alone */
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us = dst;
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p = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
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datalen = 0;
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for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++) {
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register u_short vflags = v->uv_flags;
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register u_char rflags = 0;
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if (vflags & VIFF_TUNNEL)
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rflags |= DVMRP_NF_TUNNEL;
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if (vflags & VIFF_SRCRT)
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rflags |= DVMRP_NF_SRCRT;
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if (vflags & VIFF_DOWN)
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rflags |= DVMRP_NF_DOWN;
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if (vflags & VIFF_DISABLED)
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rflags |= DVMRP_NF_DISABLED;
|
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if (vflags & VIFF_QUERIER)
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rflags |= DVMRP_NF_QUERIER;
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ncount = 0;
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la = v->uv_neighbors;
|
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if (la == NULL) {
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/*
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* include down & disabled interfaces and interfaces on
|
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* leaf nets.
|
|
*/
|
|
if (rflags & DVMRP_NF_TUNNEL)
|
|
rflags |= DVMRP_NF_DOWN;
|
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if (datalen > MAX_DVMRP_DATA_LEN - 12) {
|
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send_igmp(us, them, IGMP_DVMRP, DVMRP_NEIGHBORS2,
|
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htonl(MROUTED_LEVEL), datalen);
|
|
p = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
|
|
datalen = 0;
|
|
}
|
|
*(u_int*)p = v->uv_lcl_addr;
|
|
p += 4;
|
|
*p++ = v->uv_metric;
|
|
*p++ = v->uv_threshold;
|
|
*p++ = rflags;
|
|
*p++ = 1;
|
|
*(u_int*)p = v->uv_rmt_addr;
|
|
p += 4;
|
|
datalen += 12;
|
|
} else {
|
|
for ( ; la; la = la->al_next) {
|
|
/* Make sure that there's room for this neighbor... */
|
|
if (datalen + (ncount == 0 ? 4+4+4 : 4) > MAX_DVMRP_DATA_LEN) {
|
|
send_igmp(us, them, IGMP_DVMRP, DVMRP_NEIGHBORS2,
|
|
htonl(MROUTED_LEVEL), datalen);
|
|
p = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
|
|
datalen = 0;
|
|
ncount = 0;
|
|
}
|
|
/* Put out the header for this neighbor list... */
|
|
if (ncount == 0) {
|
|
*(u_int*)p = v->uv_lcl_addr;
|
|
p += 4;
|
|
*p++ = v->uv_metric;
|
|
*p++ = v->uv_threshold;
|
|
*p++ = rflags;
|
|
ncount = p;
|
|
*p++ = 0;
|
|
datalen += 4 + 4;
|
|
}
|
|
*(u_int*)p = la->al_addr;
|
|
p += 4;
|
|
datalen += 4;
|
|
(*ncount)++;
|
|
}
|
|
}
|
|
}
|
|
if (datalen != 0)
|
|
send_igmp(us, them, IGMP_DVMRP, DVMRP_NEIGHBORS2, htonl(MROUTED_LEVEL),
|
|
datalen);
|
|
}
|
|
|
|
|
|
/*
|
|
* Process an incoming neighbor-list message.
|
|
*/
|
|
void accept_neighbors(src, dst, p, datalen, level)
|
|
u_long src, dst, level;
|
|
char *p;
|
|
int datalen;
|
|
{
|
|
log(LOG_INFO, 0, "ignoring spurious DVMRP neighbor list from %s to %s",
|
|
inet_fmt(src, s1), inet_fmt(dst, s2));
|
|
}
|
|
|
|
/*
|
|
* Process an incoming neighbor-list message.
|
|
*/
|
|
void accept_neighbors2(src, dst, p, datalen, level)
|
|
u_long src, dst, level;
|
|
char *p;
|
|
int datalen;
|
|
{
|
|
log(LOG_INFO, 0, "ignoring spurious DVMRP neighbor list2 from %s to %s",
|
|
inet_fmt(src, s1), inet_fmt(dst, s2));
|
|
}
|
|
|
|
|
|
/*
|
|
* Update the neighbor entry for neighbor 'addr' on vif 'vifi'.
|
|
* 'msgtype' is the type of DVMRP message received from the neighbor.
|
|
* Return TRUE if 'addr' is a valid neighbor, FALSE otherwise.
|
|
*/
|
|
int update_neighbor(vifi, addr, msgtype)
|
|
vifi_t vifi;
|
|
u_long addr;
|
|
int msgtype;
|
|
{
|
|
register struct uvif *v;
|
|
register struct listaddr *n;
|
|
|
|
v = &uvifs[vifi];
|
|
|
|
/*
|
|
* Confirm that 'addr' is a valid neighbor address on vif 'vifi'.
|
|
* IT IS ASSUMED that this was preceded by a call to find_vif(), which
|
|
* checks that 'addr' is either a valid remote tunnel endpoint or a
|
|
* non-broadcast address belonging to a directly-connected subnet.
|
|
* Therefore, here we check only that 'addr' is not our own address
|
|
* (due to an impostor or erroneous loopback) or an address of the form
|
|
* {subnet,0} ("the unknown host"). These checks are not performed in
|
|
* find_vif() because those types of address are acceptable for some
|
|
* types of IGMP message (such as group membership reports).
|
|
*/
|
|
if (!(v->uv_flags & VIFF_TUNNEL) &&
|
|
(addr == v->uv_lcl_addr ||
|
|
addr == v->uv_subnet )) {
|
|
log(LOG_WARNING, 0,
|
|
"received DVMRP message from 'the unknown host' or self: %s",
|
|
inet_fmt(addr, s1));
|
|
return (FALSE);
|
|
}
|
|
|
|
/*
|
|
* If we have received a route report from a neighbor, and we believed
|
|
* that we had no neighbors on this vif, send a full route report to
|
|
* all neighbors on the vif.
|
|
*/
|
|
|
|
if (msgtype == DVMRP_REPORT && v->uv_neighbors == NULL)
|
|
report(ALL_ROUTES, vifi,
|
|
(v->uv_flags & VIFF_TUNNEL) ? addr : dvmrp_group);
|
|
|
|
/*
|
|
* Look for addr in list of neighbors; if found, reset its timer.
|
|
*/
|
|
for (n = v->uv_neighbors; n != NULL; n = n->al_next) {
|
|
if (addr == n->al_addr) {
|
|
n->al_timer = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If not found, add it to the list. If the neighbor has a lower
|
|
* IP address than me, yield querier duties to it.
|
|
*/
|
|
if (n == NULL) {
|
|
n = (struct listaddr *)malloc(sizeof(struct listaddr));
|
|
if (n == NULL)
|
|
log(LOG_ERR, 0, "ran out of memory"); /* fatal */
|
|
|
|
n->al_addr = addr;
|
|
n->al_timer = 0;
|
|
n->al_next = v->uv_neighbors;
|
|
v->uv_neighbors = n;
|
|
|
|
if (!(v->uv_flags & VIFF_TUNNEL) &&
|
|
ntohl(addr) < ntohl(v->uv_lcl_addr))
|
|
v->uv_flags &= ~VIFF_QUERIER;
|
|
}
|
|
|
|
return (TRUE);
|
|
}
|
|
|
|
|
|
/*
|
|
* On every timer interrupt, advance the timer in each neighbor and
|
|
* group entry on every vif.
|
|
*/
|
|
void age_vifs()
|
|
{
|
|
register vifi_t vifi;
|
|
register struct uvif *v;
|
|
register struct listaddr *a, *prev_a, *n;
|
|
register u_long addr;
|
|
|
|
for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v ) {
|
|
|
|
for (prev_a = (struct listaddr *)&(v->uv_neighbors),
|
|
a = v->uv_neighbors;
|
|
a != NULL;
|
|
prev_a = a, a = a->al_next) {
|
|
|
|
if ((a->al_timer += TIMER_INTERVAL) < NEIGHBOR_EXPIRE_TIME)
|
|
continue;
|
|
|
|
/*
|
|
* Neighbor has expired; delete it from the neighbor list,
|
|
* delete it from the 'dominants' and 'subordinates arrays of
|
|
* any route entries and assume querier duties unless there is
|
|
* another neighbor with a lower IP address than mine.
|
|
*/
|
|
addr = a->al_addr;
|
|
prev_a->al_next = a->al_next;
|
|
free((char *)a);
|
|
a = prev_a;
|
|
|
|
delete_neighbor_from_routes(addr, vifi);
|
|
|
|
if (!(v->uv_flags & VIFF_TUNNEL)) {
|
|
v->uv_flags |= VIFF_QUERIER;
|
|
for (n = v->uv_neighbors; n != NULL; n = n->al_next) {
|
|
if (ntohl(n->al_addr) < ntohl(v->uv_lcl_addr)) {
|
|
v->uv_flags &= ~VIFF_QUERIER;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
for (prev_a = (struct listaddr *)&(v->uv_groups),
|
|
a = v->uv_groups;
|
|
a != NULL;
|
|
prev_a = a, a = a->al_next) {
|
|
|
|
if ((a->al_timer += TIMER_INTERVAL) < GROUP_EXPIRE_TIME)
|
|
continue;
|
|
|
|
/*
|
|
* Group has expired; tell kernel and delete from group list.
|
|
*/
|
|
k_del_group(vifi, a->al_addr);
|
|
|
|
prev_a->al_next = a->al_next;
|
|
free((char *)a);
|
|
a = prev_a;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Print the contents of the uvifs array on file 'fp'.
|
|
*/
|
|
void dump_vifs(fp)
|
|
FILE *fp;
|
|
{
|
|
register vifi_t vifi;
|
|
register struct uvif *v;
|
|
register struct listaddr *a;
|
|
|
|
fprintf(fp,
|
|
"\nVirtual Interface Table\n%s",
|
|
" Vif Local-Address Metric Thresh Flags\n");
|
|
|
|
for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++) {
|
|
|
|
fprintf(fp, " %2u %-15s %6s: %-15s %4u %7u ",
|
|
vifi,
|
|
inet_fmt(v->uv_lcl_addr, s1),
|
|
(v->uv_flags & VIFF_TUNNEL) ?
|
|
"tunnel":
|
|
"subnet",
|
|
(v->uv_flags & VIFF_TUNNEL) ?
|
|
inet_fmt(v->uv_rmt_addr, s2) :
|
|
inet_fmts(v->uv_subnet, v->uv_subnetmask, s3),
|
|
v->uv_metric,
|
|
v->uv_threshold);
|
|
|
|
if (v->uv_flags & VIFF_DOWN) fprintf(fp, " down");
|
|
if (v->uv_flags & VIFF_DISABLED) fprintf(fp, " disabled");
|
|
if (v->uv_flags & VIFF_QUERIER) fprintf(fp, " querier");
|
|
if (v->uv_flags & VIFF_SRCRT) fprintf(fp, " src-rt");
|
|
fprintf(fp, "\n");
|
|
|
|
if (v->uv_neighbors != NULL) {
|
|
fprintf(fp, " peers : %-15s\n",
|
|
inet_fmt(v->uv_neighbors->al_addr, s1));
|
|
for (a = v->uv_neighbors->al_next; a != NULL; a = a->al_next) {
|
|
fprintf(fp, " %-15s\n",
|
|
inet_fmt(a->al_addr, s1));
|
|
}
|
|
}
|
|
|
|
if (v->uv_groups != NULL) {
|
|
fprintf(fp, " groups: %-15s\n",
|
|
inet_fmt(v->uv_groups->al_addr, s1));
|
|
for (a = v->uv_groups->al_next; a != NULL; a = a->al_next) {
|
|
fprintf(fp, " %-15s\n",
|
|
inet_fmt(a->al_addr, s1));
|
|
}
|
|
}
|
|
}
|
|
fprintf(fp, "\n");
|
|
}
|