jimzah/freebsd-src
1
0
Fork 0
mirror of https://github.com/freebsd/freebsd-src.git synced 2024-12-03 14:48:57 +00:00
Code Issues Actions 2 Packages Projects Releases Wiki Activity
c310386321
freebsd-src/usr.sbin/mrouted/vif.c
Peter Wemm 97d92980a9 $Id$ -> $FreeBSD$
1999-08-28 01:35:59 +00:00

1863 lines
47 KiB
C
Raw Blame History

/*
* The mrouted program is covered by the license in the accompanying file
* named "LICENSE". Use of the mrouted program represents acceptance of
* the terms and conditions listed in that file.
*
* The mrouted program is COPYRIGHT 1989 by The Board of Trustees of
* Leland Stanford Junior University.
*
*
* vif.c,v 3.8.4.56.2.1 1999/01/20 05:18:50 fenner Exp
*/
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include "defs.h"
#include <fcntl.h>
/*
* Exported variables.
*/
struct uvif uvifs[MAXVIFS]; /* array of virtual interfaces */
vifi_t numvifs; /* number of vifs in use */
int vifs_down; /* 1=>some interfaces are down */
int phys_vif; /* An enabled vif */
int udp_socket; /* Since the honkin' kernel doesn't support */
/* ioctls on raw IP sockets, we need a UDP */
/* socket as well as our IGMP (raw) socket. */
/* How dumb. */
int vifs_with_neighbors; /* == 1 if I am a leaf */
/*
* Private variables.
*/
struct listaddr *nbrs[MAXNBRS]; /* array of neighbors */
typedef struct {
vifi_t vifi;
struct listaddr *g;
int q_time;
} cbk_t;
/*
* Forward declarations.
*/
static void start_vif __P((vifi_t vifi));
static void start_vif2 __P((vifi_t vifi));
static void stop_vif __P((vifi_t vifi));
static void age_old_hosts __P((void));
static void send_probe_on_vif __P((struct uvif *v));
static void send_query __P((struct uvif *v));
static int info_version __P((char *p, int plen));
static void DelVif __P((void *arg));
static int SetTimer __P((int vifi, struct listaddr *g));
static int DeleteTimer __P((int id));
static void SendQuery __P((void *arg));
static int SetQueryTimer __P((struct listaddr *g, vifi_t vifi, int to_expire,
int q_time));
/*
* Initialize the virtual interfaces, but do not install
* them in the kernel. Start routing on all vifs that are
* not down or disabled.
*/
void
init_vifs()
{
vifi_t vifi;
struct uvif *v;
int enabled_vifs, enabled_phyints;
extern char *configfilename;
numvifs = 0;
vifs_with_neighbors = 0;
vifs_down = FALSE;
/*
* Configure the vifs based on the interface configuration of the
* the kernel and the contents of the configuration file.
* (Open a UDP socket for ioctl use in the config procedures if
* the kernel can't handle IOCTL's on the IGMP socket.)
*/
#ifdef IOCTL_OK_ON_RAW_SOCKET
udp_socket = igmp_socket;
#else
if ((udp_socket = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
log(LOG_ERR, errno, "UDP socket");
#endif
log(LOG_INFO,0,"Getting vifs from kernel interfaces");
config_vifs_from_kernel();
log(LOG_INFO,0,"Getting vifs from %s",configfilename);
config_vifs_from_file();
/*
* Quit if there are fewer than two enabled vifs.
*/
enabled_vifs = 0;
enabled_phyints = 0;
phys_vif = -1;
for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
if (!(v->uv_flags & VIFF_DISABLED)) {
++enabled_vifs;
if (!(v->uv_flags & VIFF_TUNNEL)) {
if (phys_vif == -1)
phys_vif = vifi;
++enabled_phyints;
}
}
}
if (enabled_vifs < 2)
log(LOG_ERR, 0, "can't forward: %s",
enabled_vifs == 0 ? "no enabled vifs" : "only one enabled vif");
if (enabled_phyints == 0)
log(LOG_WARNING, 0,
"no enabled interfaces, forwarding via tunnels only");
log(LOG_INFO, 0, "Installing vifs in mrouted...");
for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
if (!(v->uv_flags & VIFF_DISABLED)) {
if (!(v->uv_flags & VIFF_DOWN)) {
if (v->uv_flags & VIFF_TUNNEL)
log(LOG_INFO, 0, "vif #%d, tunnel %s -> %s", vifi,
inet_fmt(v->uv_lcl_addr, s1),
inet_fmt(v->uv_rmt_addr, s2));
else
log(LOG_INFO, 0, "vif #%d, phyint %s", vifi,
inet_fmt(v->uv_lcl_addr, s1));
start_vif2(vifi);
} else log(LOG_INFO, 0,
"%s is not yet up; vif #%u not in service",
v->uv_name, vifi);
}
}
}
/*
* Initialize the passed vif with all appropriate default values.
* "t" is true if a tunnel, or false if a phyint.
*/
void
zero_vif(v, t)
struct uvif *v;
int t;
{
v->uv_flags = 0;
v->uv_metric = DEFAULT_METRIC;
v->uv_admetric = 0;
v->uv_threshold = DEFAULT_THRESHOLD;
v->uv_rate_limit = t ? DEFAULT_TUN_RATE_LIMIT : DEFAULT_PHY_RATE_LIMIT;
v->uv_lcl_addr = 0;
v->uv_rmt_addr = 0;
v->uv_dst_addr = t ? 0 : dvmrp_group;
v->uv_subnet = 0;
v->uv_subnetmask = 0;
v->uv_subnetbcast = 0;
v->uv_name[0] = '\0';
v->uv_groups = NULL;
v->uv_neighbors = NULL;
NBRM_CLRALL(v->uv_nbrmap);
v->uv_querier = NULL;
v->uv_igmpv1_warn = 0;
v->uv_prune_lifetime = 0;
v->uv_leaf_timer = 0;
v->uv_acl = NULL;
v->uv_addrs = NULL;
v->uv_filter = NULL;
v->uv_blasterbuf = NULL;
v->uv_blastercur = NULL;
v->uv_blasterend = NULL;
v->uv_blasterlen = 0;
v->uv_blastertimer = 0;
v->uv_nbrup = 0;
v->uv_icmp_warn = 0;
v->uv_nroutes = 0;
}
/*
* Start routing on all virtual interfaces that are not down or
* administratively disabled.
*/
void
init_installvifs()
{
vifi_t vifi;
struct uvif *v;
log(LOG_INFO, 0, "Installing vifs in kernel...");
for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
if (!(v->uv_flags & VIFF_DISABLED)) {
if (!(v->uv_flags & VIFF_DOWN)) {
if (v->uv_flags & VIFF_TUNNEL)
log(LOG_INFO, 0, "vif #%d, tunnel %s -> %s", vifi,
inet_fmt(v->uv_lcl_addr, s1),
inet_fmt(v->uv_rmt_addr, s2));
else
log(LOG_INFO, 0, "vif #%d, phyint %s", vifi,
inet_fmt(v->uv_lcl_addr, s1));
k_add_vif(vifi, &uvifs[vifi]);
} else log(LOG_INFO, 0,
"%s is not yet up; vif #%u not in service",
v->uv_name, vifi);
}
}
}
/*
* See if any interfaces have changed from up state to down, or vice versa,
* including any non-multicast-capable interfaces that are in use as local
* tunnel end-points. Ignore interfaces that have been administratively
* disabled.
*/
void
check_vif_state()
{
register vifi_t vifi;
register struct uvif *v;
struct ifreq ifr;
static int checking_vifs = 0;
/*
* If we get an error while checking, (e.g. two interfaces go down
* at once, and we decide to send a prune out one of the failed ones)
* then don't go into an infinite loop!
*/
if (checking_vifs)
return;
vifs_down = FALSE;
checking_vifs = 1;
for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
if (v->uv_flags & VIFF_DISABLED) continue;
strncpy(ifr.ifr_name, v->uv_name, IFNAMSIZ);
if (ioctl(udp_socket, SIOCGIFFLAGS, (char *)&ifr) < 0)
log(LOG_ERR, errno,
"ioctl SIOCGIFFLAGS for %s", ifr.ifr_name);
if (v->uv_flags & VIFF_DOWN) {
if (ifr.ifr_flags & IFF_UP) {
log(LOG_NOTICE, 0,
"%s has come up; vif #%u now in service",
v->uv_name, vifi);
v->uv_flags &= ~VIFF_DOWN;
start_vif(vifi);
}
else vifs_down = TRUE;
}
else {
if (!(ifr.ifr_flags & IFF_UP)) {
log(LOG_NOTICE, 0,
"%s has gone down; vif #%u taken out of service",
v->uv_name, vifi);
stop_vif(vifi);
v->uv_flags |= VIFF_DOWN;
vifs_down = TRUE;
}
}
}
checking_vifs = 0;
}
/*
* Send a DVMRP message on the specified vif. If DVMRP messages are
* to be encapsulated and sent "inside" the tunnel, use the special
* encapsulator. If it's not a tunnel or DVMRP messages are to be
* sent "beside" the tunnel, as required by earlier versions of mrouted,
* then just send the message.
*/
void
send_on_vif(v, dst, code, datalen)
register struct uvif *v;
u_int32 dst;
int code;
int datalen;
{
u_int32 group = htonl(MROUTED_LEVEL |
((v->uv_flags & VIFF_LEAF) ? 0 : LEAF_FLAGS));
/*
* The UNIX kernel will not decapsulate unicasts.
* Therefore, we don't send encapsulated unicasts.
*/
if ((v->uv_flags & (VIFF_TUNNEL|VIFF_OTUNNEL)) == VIFF_TUNNEL &&
((dst == 0) || IN_MULTICAST(ntohl(dst))))
send_ipip(v->uv_lcl_addr, dst ? dst : dvmrp_group, IGMP_DVMRP,
code, group, datalen, v);
else
send_igmp(v->uv_lcl_addr, dst ? dst : v->uv_dst_addr, IGMP_DVMRP,
code, group, datalen);
}
/*
* Send a probe message on vif v
*/
static void
send_probe_on_vif(v)
register struct uvif *v;
{
register char *p;
register int datalen = 0;
struct listaddr *nbr;
int i;
if ((v->uv_flags & VIFF_PASSIVE && v->uv_neighbors == NULL) ||
(v->uv_flags & VIFF_FORCE_LEAF))
return;
p = send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN;
for (i = 0; i < 4; i++)
*p++ = ((char *)&(dvmrp_genid))[i];
datalen += 4;
/*
* add the neighbor list on the interface to the message
*/
nbr = v->uv_neighbors;
while (nbr) {
for (i = 0; i < 4; i++)
*p++ = ((char *)&nbr->al_addr)[i];
datalen +=4;
nbr = nbr->al_next;
}
send_on_vif(v, 0, DVMRP_PROBE, datalen);
}
static void
send_query(v)
register struct uvif *v;
{
IF_DEBUG(DEBUG_IGMP)
log(LOG_DEBUG, 0, "sending %squery on vif %d",
(v->uv_flags & VIFF_IGMPV1) ? "v1 " : "",
v - uvifs);
send_igmp(v->uv_lcl_addr, allhosts_group,
IGMP_MEMBERSHIP_QUERY,
(v->uv_flags & VIFF_IGMPV1) ? 0 :
IGMP_MAX_HOST_REPORT_DELAY * IGMP_TIMER_SCALE, 0, 0);
}
/*
* Add a vifi to the kernel and start routing on it.
*/
static void
start_vif(vifi)
vifi_t vifi;
{
/*
* Install the interface in the kernel's vif structure.
*/
k_add_vif(vifi, &uvifs[vifi]);
start_vif2(vifi);
}
/*
* Add a vifi to all the user-level data structures but don't add
* it to the kernel yet.
*/
static void
start_vif2(vifi)
vifi_t vifi;
{
struct uvif *v;
u_int32 src;
struct phaddr *p;
v = &uvifs[vifi];
src = v->uv_lcl_addr;
/*
* Update the existing route entries to take into account the new vif.
*/
add_vif_to_routes(vifi);
if (!(v->uv_flags & VIFF_TUNNEL)) {
/*
* Join the DVMRP multicast group on the interface.
* (This is not strictly necessary, since the kernel promiscuously
* receives IGMP packets addressed to ANY IP multicast group while
* multicast routing is enabled. However, joining the group allows
* this host to receive non-IGMP packets as well, such as 'pings'.)
*/
k_join(dvmrp_group, src);
/*
* Join the ALL-ROUTERS multicast group on the interface.
* This allows mtrace requests to loop back if they are run
* on the multicast router.
*/
k_join(allrtrs_group, src);
/*
* Install an entry in the routing table for the subnet to which
* the interface is connected.
*/
start_route_updates();
update_route(v->uv_subnet, v->uv_subnetmask, 0, 0, vifi, NULL);
for (p = v->uv_addrs; p; p = p->pa_next) {
start_route_updates();
update_route(p->pa_subnet, p->pa_subnetmask, 0, 0, vifi, NULL);
}
/*
* Until neighbors are discovered, assume responsibility for sending
* periodic group membership queries to the subnet. Send the first
* query.
*/
v->uv_flags |= VIFF_QUERIER;
IF_DEBUG(DEBUG_IGMP)
log(LOG_DEBUG, 0, "assuming querier duties on vif %d", vifi);
send_query(v);
}
v->uv_leaf_timer = LEAF_CONFIRMATION_TIME;
/*
* Send a probe via the new vif to look for neighbors.
*/
send_probe_on_vif(v);
}
/*
* Stop routing on the specified virtual interface.
*/
static void
stop_vif(vifi)
vifi_t vifi;
{
struct uvif *v;
struct listaddr *a;
struct phaddr *p;
v = &uvifs[vifi];
if (!(v->uv_flags & VIFF_TUNNEL)) {
/*
* Depart from the DVMRP multicast group on the interface.
*/
k_leave(dvmrp_group, v->uv_lcl_addr);
/*
* Depart from the ALL-ROUTERS multicast group on the interface.
*/
k_leave(allrtrs_group, v->uv_lcl_addr);
/*
* Update the entry in the routing table for the subnet to which
* the interface is connected, to take into account the interface
* failure.
*/
start_route_updates();
update_route(v->uv_subnet, v->uv_subnetmask, UNREACHABLE, 0, vifi, NULL);
for (p = v->uv_addrs; p; p = p->pa_next) {
start_route_updates();
update_route(p->pa_subnet, p->pa_subnetmask, UNREACHABLE, 0, vifi, NULL);
}
/*
* Discard all group addresses. (No need to tell kernel;
* the k_del_vif() call, below, will clean up kernel state.)
*/
while (v->uv_groups != NULL) {
a = v->uv_groups;
v->uv_groups = a->al_next;
free((char *)a);
}
IF_DEBUG(DEBUG_IGMP)
log(LOG_DEBUG, 0, "releasing querier duties on vif %d", vifi);
v->uv_flags &= ~VIFF_QUERIER;
}
/*
* Update the existing route entries to take into account the vif failure.
*/
delete_vif_from_routes(vifi);
/*
* Delete the interface from the kernel's vif structure.
*/
k_del_vif(vifi);
/*
* Discard all neighbor addresses.
*/
if (!NBRM_ISEMPTY(v->uv_nbrmap))
vifs_with_neighbors--;
while (v->uv_neighbors != NULL) {
a = v->uv_neighbors;
v->uv_neighbors = a->al_next;
nbrs[a->al_index] = NULL;
free((char *)a);
}
NBRM_CLRALL(v->uv_nbrmap);
}
/*
* stop routing on all vifs
*/
void
stop_all_vifs()
{
vifi_t vifi;
struct uvif *v;
struct listaddr *a;
struct vif_acl *acl;
for (vifi = 0; vifi < numvifs; vifi++) {
v = &uvifs[vifi];
while (v->uv_groups != NULL) {
a = v->uv_groups;
v->uv_groups = a->al_next;
free((char *)a);
}
while (v->uv_neighbors != NULL) {
a = v->uv_neighbors;
v->uv_neighbors = a->al_next;
nbrs[a->al_index] = NULL;
free((char *)a);
}
while (v->uv_acl != NULL) {
acl = v->uv_acl;
v->uv_acl = acl->acl_next;
free((char *)acl);
}
}
}
/*
* Find the virtual interface from which an incoming packet arrived,
* based on the packet's source and destination IP addresses.
*/
vifi_t
find_vif(src, dst)
register u_int32 src;
register u_int32 dst;
{
register vifi_t vifi;
register struct uvif *v;
register struct phaddr *p;
for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
if (!(v->uv_flags & (VIFF_DOWN|VIFF_DISABLED))) {
if (v->uv_flags & VIFF_TUNNEL) {
if (src == v->uv_rmt_addr && (dst == v->uv_lcl_addr ||
dst == dvmrp_group))
return(vifi);
}
else {
if ((src & v->uv_subnetmask) == v->uv_subnet &&
((v->uv_subnetmask == 0xffffffff) ||
(src != v->uv_subnetbcast)))
return(vifi);
for (p=v->uv_addrs; p; p=p->pa_next) {
if ((src & p->pa_subnetmask) == p->pa_subnet &&
((p->pa_subnetmask == 0xffffffff) ||
(src != p->pa_subnetbcast)))
return(vifi);
}
}
}
}
return (NO_VIF);
}
static void
age_old_hosts()
{
register vifi_t vifi;
register struct uvif *v;
register struct listaddr *g;
/*
* Decrement the old-hosts-present timer for each
* active group on each vif.
*/
for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++)
for (g = v->uv_groups; g != NULL; g = g->al_next)
if (g->al_old)
g->al_old--;
}
/*
* Send group membership queries on each interface for which I am querier.
* Note that technically, there should be a timer per interface, as the
* dynamics of querier election can cause the "right" time to send a
* query to be different on different interfaces. However, this simple
* implementation only ever sends queries sooner than the "right" time,
* so can not cause loss of membership (but can send more packets than
* necessary)
*/
void
query_groups()
{
register vifi_t vifi;
register struct uvif *v;
for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++) {
if (v->uv_flags & VIFF_QUERIER) {
send_query(v);
}
}
age_old_hosts();
}
/*
* Process an incoming host membership query. Warn about
* IGMP version mismatches, perform querier election, and
* handle group-specific queries when we're not the querier.
*/
void
accept_membership_query(src, dst, group, tmo)
u_int32 src, dst, group;
int tmo;
{
register vifi_t vifi;
register struct uvif *v;
if ((vifi = find_vif(src, dst)) == NO_VIF ||
(uvifs[vifi].uv_flags & VIFF_TUNNEL)) {
log(LOG_INFO, 0,
"ignoring group membership query from non-adjacent host %s",
inet_fmt(src, s1));
return;
}
v = &uvifs[vifi];
if ((tmo == 0 && !(v->uv_flags & VIFF_IGMPV1)) ||
(tmo != 0 && (v->uv_flags & VIFF_IGMPV1))) {
int i;
/*
* Exponentially back-off warning rate
*/
i = ++v->uv_igmpv1_warn;
while (i && !(i & 1))
i >>= 1;
if (i == 1)
log(LOG_WARNING, 0, "%s %s on vif %d, %s",
tmo == 0 ? "Received IGMPv1 report from"
: "Received IGMPv2 report from",
inet_fmt(src, s1),
vifi,
tmo == 0 ? "please configure vif for IGMPv1"
: "but I am configured for IGMPv1");
}
if (v->uv_querier == NULL || v->uv_querier->al_addr != src) {
/*
* This might be:
* - A query from a new querier, with a lower source address
* than the current querier (who might be me)
* - A query from a new router that just started up and doesn't
* know who the querier is.
*/
if (ntohl(src) < (v->uv_querier ? ntohl(v->uv_querier->al_addr)
: ntohl(v->uv_lcl_addr))) {
IF_DEBUG(DEBUG_IGMP)
log(LOG_DEBUG, 0, "new querier %s (was %s) on vif %d",
inet_fmt(src, s1),
v->uv_querier ? inet_fmt(v->uv_querier->al_addr, s2) :
"me", vifi);
if (!v->uv_querier) {
v->uv_querier = (struct listaddr *)
malloc(sizeof(struct listaddr));
v->uv_flags &= ~VIFF_QUERIER;
}
time(&v->uv_querier->al_ctime);
v->uv_querier->al_addr = src;
} else {
IF_DEBUG(DEBUG_IGMP)
log(LOG_DEBUG, 0, "ignoring query from %s; querier on vif %d is still %s",
inet_fmt(src, s1), vifi,
v->uv_querier ? inet_fmt(v->uv_querier->al_addr, s2) :
"me");
return;
}
}
/*
* Reset the timer since we've received a query.
*/
if (v->uv_querier && src == v->uv_querier->al_addr)
v->uv_querier->al_timer = 0;
/*
* If this is a Group-Specific query which we did not source,
* we must set our membership timer to [Last Member Query Count] *
* the [Max Response Time] in the packet.
*/
if (!(v->uv_flags & (VIFF_IGMPV1|VIFF_QUERIER)) && group != 0 &&
src != v->uv_lcl_addr) {
register struct listaddr *g;
IF_DEBUG(DEBUG_IGMP)
log(LOG_DEBUG, 0,
"%s for %s from %s on vif %d, timer %d",
"Group-specific membership query",
inet_fmt(group, s2), inet_fmt(src, s1), vifi, tmo);
for (g = v->uv_groups; g != NULL; g = g->al_next) {
if (group == g->al_addr && g->al_query == 0) {
/* setup a timeout to remove the group membership */
if (g->al_timerid)
g->al_timerid = DeleteTimer(g->al_timerid);
g->al_timer = IGMP_LAST_MEMBER_QUERY_COUNT *
tmo / IGMP_TIMER_SCALE;
/* use al_query to record our presence in last-member state */
g->al_query = -1;
g->al_timerid = SetTimer(vifi, g);
IF_DEBUG(DEBUG_IGMP)
log(LOG_DEBUG, 0,
"timer for grp %s on vif %d set to %d",
inet_fmt(group, s2), vifi, g->al_timer);
break;
}
}
}
}
/*
* Process an incoming group membership report.
*/
void
accept_group_report(src, dst, group, r_type)
u_int32 src, dst, group;
int r_type;
{
register vifi_t vifi;
register struct uvif *v;
register struct listaddr *g;
if ((vifi = find_vif(src, dst)) == NO_VIF ||
(uvifs[vifi].uv_flags & VIFF_TUNNEL)) {
log(LOG_INFO, 0,
"ignoring group membership report from non-adjacent host %s",
inet_fmt(src, s1));
return;
}
v = &uvifs[vifi];
/*
* Look for the group in our group list; if found, reset its timer.
*/
for (g = v->uv_groups; g != NULL; g = g->al_next) {
if (group == g->al_addr) {
if (r_type == IGMP_V1_MEMBERSHIP_REPORT)
g->al_old = OLD_AGE_THRESHOLD;
g->al_reporter = src;
/** delete old timers, set a timer for expiration **/
g->al_timer = IGMP_GROUP_MEMBERSHIP_INTERVAL;
if (g->al_query)
g->al_query = DeleteTimer(g->al_query);
if (g->al_timerid)
g->al_timerid = DeleteTimer(g->al_timerid);
g->al_timerid = SetTimer(vifi, g);
break;
}
}
/*
* If not found, add it to the list and update kernel cache.
*/
if (g == NULL) {
g = (struct listaddr *)malloc(sizeof(struct listaddr));
if (g == NULL)
log(LOG_ERR, 0, "ran out of memory"); /* fatal */
g->al_addr = group;
if (r_type == IGMP_V1_MEMBERSHIP_REPORT)
g->al_old = OLD_AGE_THRESHOLD;
else
g->al_old = 0;
/** set a timer for expiration **/
g->al_query = 0;
g->al_timer = IGMP_GROUP_MEMBERSHIP_INTERVAL;
g->al_reporter = src;
g->al_timerid = SetTimer(vifi, g);
g->al_next = v->uv_groups;
v->uv_groups = g;
time(&g->al_ctime);
update_lclgrp(vifi, group);
}
/*
* Check if a graft is necessary for this group
*/
chkgrp_graft(vifi, group);
}
/*
* Process an incoming IGMPv2 Leave Group message.
*/
void
accept_leave_message(src, dst, group)
u_int32 src, dst, group;
{
register vifi_t vifi;
register struct uvif *v;
register struct listaddr *g;
if ((vifi = find_vif(src, dst)) == NO_VIF ||
(uvifs[vifi].uv_flags & VIFF_TUNNEL)) {
log(LOG_INFO, 0,
"ignoring group leave report from non-adjacent host %s",
inet_fmt(src, s1));
return;
}
v = &uvifs[vifi];
if (!(v->uv_flags & VIFF_QUERIER) || (v->uv_flags & VIFF_IGMPV1))
return;
/*
* Look for the group in our group list in order to set up a short-timeout
* query.
*/
for (g = v->uv_groups; g != NULL; g = g->al_next) {
if (group == g->al_addr) {
IF_DEBUG(DEBUG_IGMP)
log(LOG_DEBUG, 0,
"[vif.c, _accept_leave_message] %d %d \n",
g->al_old, g->al_query);
/* Ignore the leave message if there are old hosts present */
if (g->al_old)
return;
/* still waiting for a reply to a query, ignore the leave */
if (g->al_query)
return;
/** delete old timer set a timer for expiration **/
if (g->al_timerid)
g->al_timerid = DeleteTimer(g->al_timerid);
#if IGMP_LAST_MEMBER_QUERY_COUNT != 2
This code needs to be updated to keep a counter of the number
of queries remaining.
#endif
/** send a group specific querry **/
g->al_timer = IGMP_LAST_MEMBER_QUERY_INTERVAL *
(IGMP_LAST_MEMBER_QUERY_COUNT + 1);
send_igmp(v->uv_lcl_addr, g->al_addr,
IGMP_MEMBERSHIP_QUERY,
IGMP_LAST_MEMBER_QUERY_INTERVAL * IGMP_TIMER_SCALE,
g->al_addr, 0);
g->al_query = SetQueryTimer(g, vifi,
IGMP_LAST_MEMBER_QUERY_INTERVAL,
IGMP_LAST_MEMBER_QUERY_INTERVAL * IGMP_TIMER_SCALE);
g->al_timerid = SetTimer(vifi, g);
break;
}
}
}
/*
* Send a periodic probe on all vifs.
* Useful to determine one-way interfaces.
* Detect neighbor loss faster.
*/
void
probe_for_neighbors()
{
register vifi_t vifi;
register struct uvif *v;
for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++) {
if (!(v->uv_flags & (VIFF_DOWN|VIFF_DISABLED))) {
send_probe_on_vif(v);
}
}
}
/*
* Send a list of all of our neighbors to the requestor, `src'.
*/
void
accept_neighbor_request(src, dst)
u_int32 src, dst;
{
vifi_t vifi;
struct uvif *v;
u_char *p, *ncount;
struct listaddr *la;
int datalen;
u_int32 temp_addr, them = src;
#define PUT_ADDR(a) temp_addr = ntohl(a); \
*p++ = temp_addr >> 24; \
*p++ = (temp_addr >> 16) & 0xFF; \
*p++ = (temp_addr >> 8) & 0xFF; \
*p++ = temp_addr & 0xFF;
p = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
datalen = 0;
for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++) {
if (v->uv_flags & VIFF_DISABLED)
continue;
ncount = 0;
for (la = v->uv_neighbors; la; la = la->al_next) {
/* Make sure that there's room for this neighbor... */
if (datalen + (ncount == 0 ? 4 + 3 + 4 : 4) > MAX_DVMRP_DATA_LEN) {
send_igmp(INADDR_ANY, them, IGMP_DVMRP, DVMRP_NEIGHBORS,
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) {
PUT_ADDR(v->uv_lcl_addr);
*p++ = v->uv_metric;
*p++ = v->uv_threshold;
ncount = p;
*p++ = 0;
datalen += 4 + 3;
}
PUT_ADDR(la->al_addr);
datalen += 4;
(*ncount)++;
}
}
if (datalen != 0)
send_igmp(INADDR_ANY, them, IGMP_DVMRP, DVMRP_NEIGHBORS,
htonl(MROUTED_LEVEL), datalen);
}
/*
* Send a list of all of our neighbors to the requestor, `src'.
*/
void
accept_neighbor_request2(src, dst)
u_int32 src, dst;
{
vifi_t vifi;
struct uvif *v;
u_char *p, *ncount;
struct listaddr *la;
int datalen;
u_int32 them = src;
p = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
datalen = 0;
for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++) {
register u_short vflags = v->uv_flags;
register u_char rflags = 0;
if (vflags & VIFF_TUNNEL)
rflags |= DVMRP_NF_TUNNEL;
if (vflags & VIFF_SRCRT)
rflags |= DVMRP_NF_SRCRT;
if (vflags & VIFF_DOWN)
rflags |= DVMRP_NF_DOWN;
if (vflags & VIFF_DISABLED)
rflags |= DVMRP_NF_DISABLED;
if (vflags & VIFF_QUERIER)
rflags |= DVMRP_NF_QUERIER;
if (vflags & VIFF_LEAF)
rflags |= DVMRP_NF_LEAF;
ncount = 0;
la = v->uv_neighbors;
if (la == NULL) {
/*
* include down & disabled interfaces and interfaces on
* leaf nets.
*/
if (rflags & DVMRP_NF_TUNNEL)
rflags |= DVMRP_NF_DOWN;
if (datalen > MAX_DVMRP_DATA_LEN - 12) {
send_igmp(INADDR_ANY, them, IGMP_DVMRP, DVMRP_NEIGHBORS2,
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(INADDR_ANY, 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) {
/* If it's a one-way tunnel, mark it down. */
if (rflags & DVMRP_NF_TUNNEL && la->al_flags & NBRF_ONEWAY)
rflags |= DVMRP_NF_DOWN;
*(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;
}
/* Don't report one-way peering on phyint at all */
if (!(rflags & DVMRP_NF_TUNNEL) && la->al_flags & NBRF_ONEWAY)
continue;
*(u_int*)p = la->al_addr;
p += 4;
datalen += 4;
(*ncount)++;
}
if (*ncount == 0) {
*(u_int*)p = v->uv_rmt_addr;
p += 4;
datalen += 4;
(*ncount)++;
}
}
}
if (datalen != 0)
send_igmp(INADDR_ANY, them, IGMP_DVMRP, DVMRP_NEIGHBORS2,
htonl(MROUTED_LEVEL), datalen);
}
void
accept_info_request(src, dst, p, datalen)
u_int32 src, dst;
u_char *p;
int datalen;
{
u_char *q;
int len;
int outlen = 0;
q = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
/* To be general, this must deal properly with breaking up over-sized
* packets. That implies passing a length to each function, and
* allowing each function to request to be called again. Right now,
* we're only implementing the one thing we are positive will fit into
* a single packet, so we wimp out.
*/
while (datalen > 0) {
len = 0;
switch (*p) {
case DVMRP_INFO_VERSION:
len = info_version(q, RECV_BUF_SIZE-(q-(u_char *)send_buf));
break;
case DVMRP_INFO_NEIGHBORS:
default:
log(LOG_INFO, 0, "ignoring unknown info type %d", *p);
break;
}
*(q+1) = len++;
outlen += len * 4;
q += len * 4;
len = (*(p+1) + 1) * 4;
p += len;
datalen -= len;
}
if (outlen != 0)
send_igmp(INADDR_ANY, src, IGMP_DVMRP, DVMRP_INFO_REPLY,
htonl(MROUTED_LEVEL), outlen);
}
/*
* Information response -- return version string
*/
static int
info_version(p, plen)
char *p;
int plen;
{
int len;
extern char versionstring[];
*p++ = DVMRP_INFO_VERSION;
p++; /* skip over length */
*p++ = 0; /* zero out */
*p++ = 0; /* reserved fields */
strncpy(p, versionstring, plen - 4);
p[plen-5] = '\0';
len = strlen(versionstring);
return ((len + 3) / 4);
}
/*
* Process an incoming neighbor-list message.
*/
void
accept_neighbors(src, dst, p, datalen, level)
u_int32 src, dst, level;
u_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_int32 src, dst, level;
u_char *p;
int datalen;
{
IF_DEBUG(DEBUG_PKT)
log(LOG_DEBUG, 0, "ignoring spurious DVMRP neighbor list2 from %s to %s",
inet_fmt(src, s1), inet_fmt(dst, s2));
}
/*
* Process an incoming info reply message.
*/
void
accept_info_reply(src, dst, p, datalen)
u_int32 src, dst;
u_char *p;
int datalen;
{
IF_DEBUG(DEBUG_PKT)
log(LOG_DEBUG, 0, "ignoring spurious DVMRP info reply 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 the neighbor entry if 'addr' is a valid neighbor, FALSE otherwise.
*/
struct listaddr *
update_neighbor(vifi, addr, msgtype, p, datalen, level)
vifi_t vifi;
u_int32 addr;
int msgtype;
char *p;
int datalen;
u_int32 level;
{
register struct uvif *v;
register struct listaddr *n;
int pv = level & 0xff;
int mv = (level >> 8) & 0xff;
int has_genid = 0;
int in_router_list = 0;
int dvmrpspec = 0;
u_int32 genid;
u_int32 send_tables = 0;
int i;
int do_reset = FALSE;
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 %s: %s",
(addr == v->uv_lcl_addr) ? "self (check device loopback)" :
"'the unknown host'",
inet_fmt(addr, s1));
return NULL;
}
/*
* Ignore all neighbors on vifs forced into leaf mode
*/
if (v->uv_flags & VIFF_FORCE_LEAF) {
return NULL;
}
/*
* mrouted's version 3.3 and later include the generation ID
* and the list of neighbors on the vif in their probe messages.
*/
if (msgtype == DVMRP_PROBE && ((pv == 3 && mv > 2) ||
(pv > 3 && pv < 10))) {
u_int32 router;
IF_DEBUG(DEBUG_PEER)
log(LOG_DEBUG, 0, "checking probe from %s (%d.%d) on vif %d",
inet_fmt(addr, s1), pv, mv, vifi);
if (datalen < 4) {
log(LOG_WARNING, 0,
"received truncated probe message from %s (len %d)",
inet_fmt(addr, s1), datalen);
return NULL;
}
has_genid = 1;
for (i = 0; i < 4; i++)
((char *)&genid)[i] = *p++;
datalen -= 4;
while (datalen > 0) {
if (datalen < 4) {
log(LOG_WARNING, 0,
"received truncated probe message from %s (len %d)",
inet_fmt(addr, s1), datalen);
return NULL;
}
for (i = 0; i < 4; i++)
((char *)&router)[i] = *p++;
datalen -= 4;
if (router == v->uv_lcl_addr) {
in_router_list = 1;
break;
}
}
}
if ((pv == 3 && mv == 255) || (pv > 3 && pv < 10))
dvmrpspec = 1;
/*
* Look for addr in list of neighbors.
*/
for (n = v->uv_neighbors; n != NULL; n = n->al_next) {
if (addr == n->al_addr) {
break;
}
}
if (n == NULL) {
/*
* New neighbor.
*
* If this neighbor follows the DVMRP spec, start the probe
* handshake. If not, then it doesn't require the probe
* handshake, so establish the peering immediately.
*/
if (dvmrpspec && (msgtype != DVMRP_PROBE))
return NULL;
for (i = 0; i < MAXNBRS; i++)
if (nbrs[i] == NULL)
break;
if (i == MAXNBRS) {
/* XXX This is a severe new restriction. */
/* XXX want extensible bitmaps! */
log(LOG_ERR, 0, "Can't handle %dth neighbor %s on vif %d!",
MAXNBRS, inet_fmt(addr, s1), vifi);
/*NOTREACHED*/
}
/*
* Add it to our list of neighbors.
*/
IF_DEBUG(DEBUG_PEER)
log(LOG_DEBUG, 0, "New neighbor %s on vif %d v%d.%d nf 0x%02x idx %d",
inet_fmt(addr, s1), vifi, level & 0xff, (level >> 8) & 0xff,
(level >> 16) & 0xff, i);
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_pv = pv;
n->al_mv = mv;
n->al_genid = has_genid ? genid : 0;
n->al_index = i;
nbrs[i] = n;
time(&n->al_ctime);
n->al_timer = 0;
n->al_flags = has_genid ? NBRF_GENID : 0;
n->al_next = v->uv_neighbors;
v->uv_neighbors = n;
/*
* If we are not configured to peer with non-pruning routers,
* check the deprecated "I-know-how-to-prune" bit. This bit
* was MBZ in early mrouted implementations (<3.5) and is required
* to be set by the DVMRPv3 specification.
*/
if (!(v->uv_flags & VIFF_ALLOW_NONPRUNERS) &&
!((level & 0x020000) || (pv == 3 && mv < 5))) {
n->al_flags |= NBRF_TOOOLD;
}
/*
* If this router implements the DVMRPv3 spec, then don't peer
* with him if we haven't yet established a bidirectional connection.
*/
if (dvmrpspec) {
if (!in_router_list) {
IF_DEBUG(DEBUG_PEER)
log(LOG_DEBUG, 0, "waiting for probe from %s with my addr",
inet_fmt(addr, s1));
n->al_flags |= NBRF_WAITING;
return NULL;
}
}
if (n->al_flags & NBRF_DONTPEER) {
IF_DEBUG(DEBUG_PEER)
log(LOG_DEBUG, 0, "not peering with %s on vif %d because %x",
inet_fmt(addr, s1), vifi, n->al_flags & NBRF_DONTPEER);
return NULL;
}
/*
* If we thought that we had no neighbors on this vif, send a route
* report to the vif. If this is just a new neighbor on the same
* vif, send the route report just to the new neighbor.
*/
if (NBRM_ISEMPTY(v->uv_nbrmap)) {
send_tables = v->uv_dst_addr;
vifs_with_neighbors++;
} else {
send_tables = addr;
}
NBRM_SET(i, v->uv_nbrmap);
add_neighbor_to_routes(vifi, i);
} else {
/*
* Found it. Reset its timer.
*/
n->al_timer = 0;
if (n->al_flags & NBRF_WAITING && msgtype == DVMRP_PROBE) {
n->al_flags &= ~NBRF_WAITING;
if (!in_router_list) {
log(LOG_WARNING, 0, "possible one-way peering with %s on vif %d",
inet_fmt(addr, s1), vifi);
n->al_flags |= NBRF_ONEWAY;
return NULL;
} else {
if (NBRM_ISEMPTY(v->uv_nbrmap)) {
send_tables = v->uv_dst_addr;
vifs_with_neighbors++;
} else {
send_tables = addr;
}
NBRM_SET(n->al_index, v->uv_nbrmap);
add_neighbor_to_routes(vifi, n->al_index);
IF_DEBUG(DEBUG_PEER)
log(LOG_DEBUG, 0, "%s on vif %d exits WAITING",
inet_fmt(addr, s1), vifi);
}
}
if (n->al_flags & NBRF_ONEWAY && msgtype == DVMRP_PROBE) {
if (in_router_list) {
if (NBRM_ISEMPTY(v->uv_nbrmap))
vifs_with_neighbors++;
NBRM_SET(n->al_index, v->uv_nbrmap);
add_neighbor_to_routes(vifi, n->al_index);
log(LOG_NOTICE, 0, "peering with %s on vif %d is no longer one-way",
inet_fmt(addr, s1), vifi);
n->al_flags &= ~NBRF_ONEWAY;
} else {
/* XXX rate-limited warning message? */
IF_DEBUG(DEBUG_PEER)
log(LOG_DEBUG, 0, "%s on vif %d is still ONEWAY",
inet_fmt(addr, s1), vifi);
}
}
/*
* When peering with a genid-capable but pre-DVMRP spec peer,
* we might bring up the peering with a route report and not
* remember his genid. Assume that he doesn't send a route
* report and then reboot before sending a probe.
*/
if (has_genid && !(n->al_flags & NBRF_GENID)) {
n->al_flags |= NBRF_GENID;
n->al_genid = genid;
}
/*
* update the neighbors version and protocol number and genid
* if changed => router went down and came up,
* so take action immediately.
*/
if ((n->al_pv != pv) ||
(n->al_mv != mv) ||
(has_genid && n->al_genid != genid)) {
do_reset = TRUE;
IF_DEBUG(DEBUG_PEER)
log(LOG_DEBUG, 0,
"version/genid change neighbor %s [old:%d.%d/%8x, new:%d.%d/%8x]",
inet_fmt(addr, s1),
n->al_pv, n->al_mv, n->al_genid, pv, mv, genid);
n->al_pv = pv;
n->al_mv = mv;
n->al_genid = genid;
time(&n->al_ctime);
}
if ((pv == 3 && mv > 2) || (pv > 3 && pv < 10)) {
if (!(n->al_flags & VIFF_ONEWAY) && has_genid && !in_router_list &&
(time(NULL) - n->al_ctime > 20)) {
if (NBRM_ISSET(n->al_index, v->uv_nbrmap)) {
NBRM_CLR(n->al_index, v->uv_nbrmap);
if (NBRM_ISEMPTY(v->uv_nbrmap))
vifs_with_neighbors--;
}
delete_neighbor_from_routes(addr, vifi, n->al_index);
reset_neighbor_state(vifi, addr);
log(LOG_WARNING, 0, "peering with %s on vif %d is one-way",
inet_fmt(addr, s1), vifi);
n->al_flags |= NBRF_ONEWAY;
}
}
if (n->al_flags & NBRF_DONTPEER) {
IF_DEBUG(DEBUG_PEER)
log(LOG_DEBUG, 0, "not peering with %s on vif %d because %x",
inet_fmt(addr, s1), vifi, n->al_flags & NBRF_DONTPEER);
return NULL;
}
/* check "leaf" flag */
}
if (do_reset) {
reset_neighbor_state(vifi, addr);
if (!send_tables)
send_tables = addr;
}
if (send_tables) {
send_probe_on_vif(v);
report(ALL_ROUTES, vifi, send_tables);
}
v->uv_leaf_timer = 0;
v->uv_flags &= ~VIFF_LEAF;
return n;
}
/*
* 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;
register u_int32 addr;
for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v ) {
if (v->uv_leaf_timer && (v->uv_leaf_timer -= TIMER_INTERVAL == 0)) {
v->uv_flags |= VIFF_LEAF;
}
for (prev_a = (struct listaddr *)&(v->uv_neighbors),
a = v->uv_neighbors;
a != NULL;
prev_a = a, a = a->al_next) {
int exp_time;
int idx;
if (((a->al_pv == 3) && (a->al_mv >= 3)) ||
((a->al_pv > 3) && (a->al_pv < 10)))
exp_time = NEIGHBOR_EXPIRE_TIME;
else
exp_time = OLD_NEIGHBOR_EXPIRE_TIME;
if ((a->al_timer += TIMER_INTERVAL) < exp_time)
continue;
IF_DEBUG(DEBUG_PEER)
log(LOG_DEBUG, 0, "Neighbor %s (%d.%d) expired after %d seconds",
inet_fmt(a->al_addr, s1), a->al_pv, a->al_mv, exp_time);
/*
* Neighbor has expired; delete it from the neighbor list,
* delete it from the 'dominants' and 'subordinates arrays of
* any route entries.
*/
NBRM_CLR(a->al_index, v->uv_nbrmap);
nbrs[a->al_index] = NULL; /* XXX is it a good idea to reuse indxs? */
idx = a->al_index;
addr = a->al_addr;
prev_a->al_next = a->al_next;
free((char *)a);
a = prev_a;/*XXX use ** */
delete_neighbor_from_routes(addr, vifi, idx);
reset_neighbor_state(vifi, addr);
if (NBRM_ISEMPTY(v->uv_nbrmap))
vifs_with_neighbors--;
v->uv_leaf_timer = LEAF_CONFIRMATION_TIME;
}
if (v->uv_querier &&
(v->uv_querier->al_timer += TIMER_INTERVAL) >
IGMP_OTHER_QUERIER_PRESENT_INTERVAL) {
/*
* The current querier has timed out. We must become the
* querier.
*/
IF_DEBUG(DEBUG_IGMP)
log(LOG_DEBUG, 0, "querier %s timed out",
inet_fmt(v->uv_querier->al_addr, s1));
free(v->uv_querier);
v->uv_querier = NULL;
v->uv_flags |= VIFF_QUERIER;
send_query(v);
}
}
}
/*
* Returns the neighbor info struct for a given neighbor
*/
struct listaddr *
neighbor_info(vifi, addr)
vifi_t vifi;
u_int32 addr;
{
struct listaddr *u;
for (u = uvifs[vifi].uv_neighbors; u; u = u->al_next)
if (u->al_addr == addr)
return u;
return NULL;
}
static struct vnflags {
int vn_flag;
char *vn_name;
} vifflags[] = {
{ VIFF_DOWN, "down" },
{ VIFF_DISABLED, "disabled" },
{ VIFF_QUERIER, "querier" },
{ VIFF_ONEWAY, "one-way" },
{ VIFF_LEAF, "leaf" },
{ VIFF_IGMPV1, "IGMPv1" },
{ VIFF_REXMIT_PRUNES, "rexmit_prunes" },
{ VIFF_PASSIVE, "passive" },
{ VIFF_ALLOW_NONPRUNERS,"allow_nonpruners" },
{ VIFF_NOFLOOD, "noflood" },
{ VIFF_NOTRANSIT, "notransit" },
{ VIFF_BLASTER, "blaster" },
{ VIFF_FORCE_LEAF, "force_leaf" },
{ VIFF_OTUNNEL, "old-tunnel" },
};
static struct vnflags nbrflags[] = {
{ NBRF_LEAF, "leaf" },
{ NBRF_GENID, "have-genid" },
{ NBRF_WAITING, "waiting" },
{ NBRF_ONEWAY, "one-way" },
{ NBRF_TOOOLD, "too old" },
{ NBRF_TOOMANYROUTES, "too many routes" },
{ NBRF_NOTPRUNING, "not pruning?" },
};
/*
* 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;
register struct phaddr *p;
register struct vif_acl *acl;
int i;
struct sioc_vif_req v_req;
time_t now;
char *label;
time(&now);
fprintf(fp, "vifs_with_neighbors = %d\n", vifs_with_neighbors);
if (vifs_with_neighbors == 1)
fprintf(fp,"[This host is a leaf]\n\n");
fprintf(fp,
"\nVirtual Interface Table\n%s",
"Vif Name Local-Address ");
fprintf(fp,
"M Thr Rate Flags\n");
for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++) {
fprintf(fp, "%2u %6s %-15s %6s: %-18s %2u %3u %5u ",
vifi,
v->uv_name,
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,
v->uv_rate_limit);
for (i = 0; i < sizeof(vifflags) / sizeof(struct vnflags); i++)
if (v->uv_flags & vifflags[i].vn_flag)
fprintf(fp, " %s", vifflags[i].vn_name);
fprintf(fp, "\n");
/*
fprintf(fp, " #routes: %d\n", v->uv_nroutes);
*/
if (v->uv_admetric != 0)
fprintf(fp, " advert-metric %2u\n",
v->uv_admetric);
label = "alternate subnets:";
for (p = v->uv_addrs; p; p = p->pa_next) {
fprintf(fp, " %18s %s\n", label,
inet_fmts(p->pa_subnet, p->pa_subnetmask, s1));
label = "";
}
label = "peers:";
for (a = v->uv_neighbors; a != NULL; a = a->al_next) {
fprintf(fp, " %6s %s (%d.%d) [%d]",
label, inet_fmt(a->al_addr, s1), a->al_pv, a->al_mv,
a->al_index);
for (i = 0; i < sizeof(nbrflags) / sizeof(struct vnflags); i++)
if (a->al_flags & nbrflags[i].vn_flag)
fprintf(fp, " %s", nbrflags[i].vn_name);
fprintf(fp, " up %s\n", scaletime(now - a->al_ctime));
/*fprintf(fp, " #routes %d\n", a->al_nroutes);*/
label = "";
}
label = "group host (time left):";
for (a = v->uv_groups; a != NULL; a = a->al_next) {
fprintf(fp, " %23s %-15s %-15s (%s)\n",
label,
inet_fmt(a->al_addr, s1),
inet_fmt(a->al_reporter, s2),
scaletime(timer_leftTimer(a->al_timerid)));
label = "";
}
label = "boundaries:";
for (acl = v->uv_acl; acl != NULL; acl = acl->acl_next) {
fprintf(fp, " %11s %-18s\n", label,
inet_fmts(acl->acl_addr, acl->acl_mask, s1));
label = "";
}
if (v->uv_filter) {
struct vf_element *vfe;
char lbuf[100];
sprintf(lbuf, "%5s %7s filter:",
v->uv_filter->vf_flags & VFF_BIDIR ? "bidir"
: " ",
v->uv_filter->vf_type == VFT_ACCEPT ? "accept"
: "deny");
label = lbuf;
for (vfe = v->uv_filter->vf_filter;
vfe != NULL; vfe = vfe->vfe_next) {
fprintf(fp, " %23s %-18s%s\n",
label,
inet_fmts(vfe->vfe_addr, vfe->vfe_mask, s1),
vfe->vfe_flags & VFEF_EXACT ? " (exact)" : "");
label = "";
}
}
if (!(v->uv_flags & (VIFF_TUNNEL|VIFF_DOWN|VIFF_DISABLED))) {
fprintf(fp, " IGMP querier: ");
if (v->uv_querier == NULL)
if (v->uv_flags & VIFF_QUERIER)
fprintf(fp, "%-18s (this system)\n",
inet_fmt(v->uv_lcl_addr, s1));
else
fprintf(fp, "NONE - querier election failure?\n");
else
fprintf(fp, "%-18s up %s last heard %s ago\n",
inet_fmt(v->uv_querier->al_addr, s1),
scaletime(now - v->uv_querier->al_ctime),
scaletime(v->uv_querier->al_timer));
}
if (v->uv_flags & VIFF_BLASTER)
fprintf(fp, " blasterbuf size: %dk\n",
v->uv_blasterlen / 1024);
fprintf(fp, " Nbr bitmaps: 0x%08lx%08lx\n",/*XXX*/
v->uv_nbrmap.hi, v->uv_nbrmap.lo);
if (v->uv_prune_lifetime != 0)
fprintf(fp, " Prune Lifetime: %d seconds\n",
v->uv_prune_lifetime);
v_req.vifi = vifi;
if (did_final_init)
if (ioctl(udp_socket, SIOCGETVIFCNT, (char *)&v_req) < 0) {
log(LOG_WARNING, errno,
"SIOCGETVIFCNT fails on vif %d", vifi);
} else {
fprintf(fp, " pkts/bytes in : %lu/%lu\n",
v_req.icount, v_req.ibytes);
fprintf(fp, " pkts/bytes out: %lu/%lu\n",
v_req.ocount, v_req.obytes);
}
fprintf(fp, "\n");
}
fprintf(fp, "\n");
}
/*
* Time out record of a group membership on a vif
*/
static void
DelVif(arg)
void *arg;
{
cbk_t *cbk = (cbk_t *)arg;
vifi_t vifi = cbk->vifi;
struct uvif *v = &uvifs[vifi];
struct listaddr *a, **anp, *g = cbk->g;
/*
* Group has expired
* delete all kernel cache entries with this group
*/
if (g->al_query)
DeleteTimer(g->al_query);
delete_lclgrp(vifi, g->al_addr);
anp = &(v->uv_groups);
while ((a = *anp) != NULL) {
if (a == g) {
*anp = a->al_next;
free((char *)a);
} else {
anp = &a->al_next;
}
}
free(cbk);
}
/*
* Set a timer to delete the record of a group membership on a vif.
*/
static int
SetTimer(vifi, g)
vifi_t vifi;
struct listaddr *g;
{
cbk_t *cbk;
cbk = (cbk_t *) malloc(sizeof(cbk_t));
cbk->g = g;
cbk->vifi = vifi;
return timer_setTimer(g->al_timer, DelVif, cbk);
}
/*
* Delete a timer that was set above.
*/
static int
DeleteTimer(id)
int id;
{
timer_clearTimer(id);
return 0;
}
/*
* Send a group-specific query.
*/
static void
SendQuery(arg)
void *arg;
{
cbk_t *cbk = (cbk_t *)arg;
register struct uvif *v = &uvifs[cbk->vifi];
send_igmp(v->uv_lcl_addr, cbk->g->al_addr,
IGMP_MEMBERSHIP_QUERY,
cbk->q_time, cbk->g->al_addr, 0);
cbk->g->al_query = 0;
free(cbk);
}
/*
* Set a timer to send a group-specific query.
*/
static int
SetQueryTimer(g, vifi, to_expire, q_time)
struct listaddr *g;
vifi_t vifi;
int to_expire, q_time;
{
cbk_t *cbk;
cbk = (cbk_t *) malloc(sizeof(cbk_t));
cbk->g = g;
cbk->q_time = q_time;
cbk->vifi = vifi;
return timer_setTimer(to_expire, SendQuery, cbk);
}
Reference in New Issue View Git Blame Copy Permalink