/*
* accept_neighbor_request() supports some old DVMRP messages from mrinfo.
* Haven't tested it, because I have only the new mrinfo.
*/
void accept_neighbor_request(u_int32 src, u_int32 dst __attribute__((unused)))
{
vifi_t vifi;
struct uvif *v;
u_char *p, *ncount;
/* struct listaddr *la; */
pim_nbr_entry_t *pim_nbr;
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 *) (igmp_send_buf + IP_IGMP_HEADER_LEN + IGMP_MINLEN);
datalen = 0;
for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++) {
if (v->uv_flags & VIFF_DISABLED)
continue;
ncount = 0;
/* TODO: XXX: if we are PMBR, then check the DVMRP interfaces too */
for (pim_nbr = v->uv_pim_neighbors; pim_nbr != (pim_nbr_entry_t *)NULL;
pim_nbr = pim_nbr->next) {
/* Make sure that there's room for this neighbor... */
if (datalen + (ncount == 0 ? 4 + 3 + 4 : 4) > MAX_DVMRP_DATA_LEN) {
send_igmp(igmp_send_buf, INADDR_ANY, them, IGMP_DVMRP,
DVMRP_NEIGHBORS, htonl(PIMD_LEVEL), datalen);
p = (u_char *) (igmp_send_buf + IP_IGMP_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(pim_nbr->address);
datalen += 4;
(*ncount)++;
}
}
if (datalen != 0)
send_igmp(igmp_send_buf, INADDR_ANY, them, IGMP_DVMRP, DVMRP_NEIGHBORS,
htonl(PIMD_LEVEL), datalen);
}
JNIEXPORT void JNICALL Java_ow_ipmulticast_Native_sendIGMP(JNIEnv *env, jclass clazz,
jint src, jint dest, jint type, jint code, jint group, jbyteArray jdata) {
jsize datalen;
jbyte *data;
src = htonl(src);
dest = htonl(dest);
group = htonl(group);
if (jdata != NULL) {
datalen = (*env)->GetArrayLength(env, jdata);
data = (*env)->GetByteArrayElements(env, jdata, NULL);
}
else {
datalen = 0;
data = NULL;
}
#if 0
printf("send\n");
printf(" src: %s\n", inet_fmt(src, s1));
printf(" dest: %s\n", inet_fmt(dest, s1));
printf(" group: %s\n", inet_fmt(group, s1));
printf(" datalen: %d\n", datalen);
fflush(stdout);
#endif
send_igmp((uint32_t)src, (uint32_t)dest, (int)type, (int)code, (uint32_t)group, (char *)data, (int)datalen);
if (jdata != NULL) {
(*env)->ReleaseByteArrayElements(env, jdata, data, JNI_ABORT);
}
}
static void start() {
#ifdef TEST_IGMP
send_igmp(selfaddr, allhostsgroup, IGMP_MEMBERSHIP_QUERY, 0, 0, NULL, 0);
#endif
while (TRUE) {
int recvLen;
socklen_t fromLen;
#ifdef TEST_IGMP
if (recv_igmp(NULL, NULL, NULL, NULL, 0) < 0) break;
#else
if (recv_dgram(NULL, NULL, NULL, NULL, 0, TRUE) < 0) break;
#endif
}
}
/*
* 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(struct uvif *v, uint32_t dst, int code, size_t datalen)
{
uint32_t 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 group membership queries on that interface if I am querier.
*/
void query_groups(struct uvif *v)
{
struct listaddr *g;
v->uv_gq_timer = IGMP_QUERY_INTERVAL;
if (v->uv_flags & VIFF_QUERIER) {
send_igmp(igmp_send_buf, 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);
}
/*
* Decrement the old-hosts-present timer for each
* active group on that vif.
*/
for (g = v->uv_groups; g != NULL; g = g->al_next) {
if (g->al_old > TIMER_INTERVAL)
g->al_old -= TIMER_INTERVAL;
else
g->al_old = 0;
}
}
/*
* Send a route report message to destination 'dst', via virtual interface
* 'vifi'. 'which_routes' specifies ALL_ROUTES or CHANGED_ROUTES.
*/
static int
report_chunk(struct rtentry *start_rt, vifi_t vifi, u_int32_t dst)
{
register struct rtentry *r;
register char *p;
register int i;
register int nrt = 0;
int datalen = 0;
int width = 0;
u_int32_t mask = 0;
u_int32_t src;
u_int32_t nflags;
src = uvifs[vifi].uv_lcl_addr;
p = send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN;
nflags = (uvifs[vifi].uv_flags & VIFF_LEAF) ? 0 : LEAF_FLAGS;
for (r = start_rt; r != RT_ADDR; r = r->rt_prev) {
#ifdef NOTYET
/* Don't send poisoned routes back to parents if I am a leaf */
if ((vifs_with_neighbors == 1) && (r->rt_parent == vifi)
&& (r->rt_metric > 1)) {
++nrt;
continue;
}
#endif
/*
* If there is no room for this route in the current message,
* send it & return how many routes we sent.
*/
if (datalen + ((r->rt_originmask == mask) ?
(width + 1) :
(r->rt_originwidth + 4)) > MAX_DVMRP_DATA_LEN) {
*(p-1) |= 0x80;
send_igmp(src, dst, IGMP_DVMRP, DVMRP_REPORT,
htonl(MROUTED_LEVEL | nflags), datalen);
return (nrt);
}
if (r->rt_originmask != mask || datalen == 0) {
mask = r->rt_originmask;
width = r->rt_originwidth;
if (datalen != 0) *(p-1) |= 0x80;
*p++ = ((char *)&mask)[1];
*p++ = ((char *)&mask)[2];
*p++ = ((char *)&mask)[3];
datalen += 3;
}
for (i = 0; i < width; ++i)
*p++ = ((char *)&(r->rt_origin))[i];
*p++ = (r->rt_parent == vifi && r->rt_metric != UNREACHABLE) ?
(char)(r->rt_metric + UNREACHABLE) : /* "poisoned reverse" */
(char)(r->rt_metric);
++nrt;
datalen += width + 1;
}
if (datalen != 0) {
*(p-1) |= 0x80;
send_igmp(src, dst, IGMP_DVMRP, DVMRP_REPORT,
htonl(MROUTED_LEVEL | nflags), datalen);
}
return (nrt);
}
/*
* Send a route report message to destination 'dst', via virtual interface
* 'vifi'. 'which_routes' specifies ALL_ROUTES or CHANGED_ROUTES.
*/
void
report(int which_routes, vifi_t vifi, u_int32_t dst)
{
register struct rtentry *r;
register char *p;
register int i;
int datalen = 0;
int width = 0;
u_int32_t mask = 0;
u_int32_t src;
u_int32_t nflags;
src = uvifs[vifi].uv_lcl_addr;
p = send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN;
#ifdef NOTYET
/* If I'm not a leaf, but the neighbor is a leaf, only advertise default */
if ((vifs_with_neighbors != 1) && (uvifs[vifi].uv_flags & VIFF_LEAF)) {
*p++ = 0; /* 0xff000000 mask */
*p++ = 0;
*p++ = 0;
*p++ = 0; /* class A net 0.0.0.0 == default */
*p++ = 0x81; /*XXX metric 1, is this safe? */
datalen += 5;
send_igmp(src, dst, IGMP_DVMRP, DVMRP_REPORT,
htonl(MROUTED_LEVEL), datalen);
return;
}
#endif
nflags = (uvifs[vifi].uv_flags & VIFF_LEAF) ? 0 : LEAF_FLAGS;
for (r = rt_end; r != RT_ADDR; r = r->rt_prev) {
if (which_routes == CHANGED_ROUTES && !(r->rt_flags & RTF_CHANGED))
continue;
/*
* If there is no room for this route in the current message,
* send the message and start a new one.
*/
if (datalen + ((r->rt_originmask == mask) ?
(width + 1) :
(r->rt_originwidth + 4)) > MAX_DVMRP_DATA_LEN) {
*(p-1) |= 0x80;
send_igmp(src, dst, IGMP_DVMRP, DVMRP_REPORT,
htonl(MROUTED_LEVEL | nflags), datalen);
p = send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN;
datalen = 0;
mask = 0;
}
if (r->rt_originmask != mask || datalen == 0) {
mask = r->rt_originmask;
width = r->rt_originwidth;
if (datalen != 0) *(p-1) |= 0x80;
*p++ = ((char *)&mask)[1];
*p++ = ((char *)&mask)[2];
*p++ = ((char *)&mask)[3];
datalen += 3;
}
for (i = 0; i < width; ++i)
*p++ = ((char *)&(r->rt_origin))[i];
*p++ = (r->rt_parent == vifi && r->rt_metric != UNREACHABLE) ?
(char)(r->rt_metric + UNREACHABLE) : /* "poisoned reverse" */
(char)(r->rt_metric);
datalen += width + 1;
}
if (datalen != 0) {
*(p-1) |= 0x80;
send_igmp(src, dst, IGMP_DVMRP, DVMRP_REPORT,
htonl(MROUTED_LEVEL | nflags), datalen);
}
}
/*
* Traceroute function which returns traceroute replies to the requesting
* router. Also forwards the request to downstream routers.
*/
void accept_mtrace(u_int32 src, u_int32 dst, u_int32 group, char *data, u_int no, int datalen)
{
u_char type;
mrtentry_t *mrt;
struct tr_query *qry;
struct tr_resp *resp;
int vifi;
char *p;
u_int rcount;
int errcode = TR_NO_ERR;
int resptype;
struct timeval tp;
struct sioc_vif_req v_req;
#if 0
/* TODO */
struct sioc_sg_req sg_req;
#endif /* 0 */
u_int32 parent_address = INADDR_ANY;
/* Remember qid across invocations */
static u_int32 oqid = 0;
/* timestamp the request/response */
gettimeofday(&tp, 0);
/*
* Check if it is a query or a response
*/
if (datalen == QLEN) {
type = QUERY;
IF_DEBUG(DEBUG_TRACE)
logit(LOG_DEBUG, 0, "Initial traceroute query rcvd from %s to %s",
inet_fmt(src, s1, sizeof(s1)), inet_fmt(dst, s2, sizeof(s2)));
}
else if ((datalen - QLEN) % RLEN == 0) {
type = RESP;
IF_DEBUG(DEBUG_TRACE)
logit(LOG_DEBUG, 0, "In-transit traceroute query rcvd from %s to %s",
inet_fmt(src, s1, sizeof(s1)), inet_fmt(dst, s2, sizeof(s2)));
if (IN_MULTICAST(ntohl(dst))) {
IF_DEBUG(DEBUG_TRACE)
logit(LOG_DEBUG, 0, "Dropping multicast response");
return;
}
}
else {
logit(LOG_WARNING, 0, "%s from %s to %s",
"Non decipherable traceroute request recieved",
inet_fmt(src, s1, sizeof(s1)), inet_fmt(dst, s2, sizeof(s2)));
return;
}
qry = (struct tr_query *)data;
/*
* if it is a packet with all reports filled, drop it
*/
if ((rcount = (datalen - QLEN)/RLEN) == no) {
IF_DEBUG(DEBUG_TRACE)
logit(LOG_DEBUG, 0, "packet with all reports filled in");
return;
}
IF_DEBUG(DEBUG_TRACE) {
logit(LOG_DEBUG, 0, "s: %s g: %s d: %s ", inet_fmt(qry->tr_src, s1, sizeof(s1)),
inet_fmt(group, s2, sizeof(s2)), inet_fmt(qry->tr_dst, s3, sizeof(s3)));
logit(LOG_DEBUG, 0, "rttl: %d rd: %s", qry->tr_rttl,
inet_fmt(qry->tr_raddr, s1, sizeof(s1)));
logit(LOG_DEBUG, 0, "rcount:%d, qid:%06x", rcount, qry->tr_qid);
}
/* determine the routing table entry for this traceroute */
mrt = find_route(qry->tr_src, group, MRTF_SG | MRTF_WC | MRTF_PMBR,
DONT_CREATE);
IF_DEBUG(DEBUG_TRACE) {
if (mrt != (mrtentry_t *)NULL) {
if (mrt->upstream != (pim_nbr_entry_t *)NULL)
parent_address = mrt->upstream->address;
else
parent_address = INADDR_ANY;
logit(LOG_DEBUG, 0, "mrt parent vif: %d rtr: %s metric: %d",
mrt->incoming, inet_fmt(parent_address, s1, sizeof(s1)), mrt->metric);
/* TODO
logit(LOG_DEBUG, 0, "mrt origin %s",
RT_FMT(rt, s1));
*/
} else {
logit(LOG_DEBUG, 0, "...no route");
}
}
/*
* Query type packet - check if rte exists
* Check if the query destination is a vif connected to me.
* and if so, whether I should start response back
*/
if (type == QUERY) {
if (oqid == qry->tr_qid) {
/*
* If the multicast router is a member of the group being
* queried, and the query is multicasted, then the router can
* recieve multiple copies of the same query. If we have already
* replied to this traceroute, just ignore it this time.
*
* This is not a total solution, but since if this fails you
* only get N copies, N <= the number of interfaces on the router,
* it is not fatal.
*/
IF_DEBUG(DEBUG_TRACE)
logit(LOG_DEBUG, 0, "ignoring duplicate traceroute packet");
return;
}
if (mrt == (mrtentry_t *)NULL) {
IF_DEBUG(DEBUG_TRACE)
logit(LOG_DEBUG, 0, "Mcast traceroute: no route entry %s",
inet_fmt(qry->tr_src, s1, sizeof(s1)));
if (IN_MULTICAST(ntohl(dst)))
return;
}
vifi = find_vif_direct(qry->tr_dst);
if (vifi == NO_VIF) {
/* The traceroute destination is not on one of my subnet vifs. */
IF_DEBUG(DEBUG_TRACE)
logit(LOG_DEBUG, 0, "Destination %s not an interface",
inet_fmt(qry->tr_dst, s1, sizeof(s1)));
if (IN_MULTICAST(ntohl(dst)))
return;
errcode = TR_WRONG_IF;
} else if (mrt != (mrtentry_t *)NULL && !VIFM_ISSET(vifi, mrt->oifs)) {
IF_DEBUG(DEBUG_TRACE)
logit(LOG_DEBUG, 0,
"Destination %s not on forwarding tree for src %s",
inet_fmt(qry->tr_dst, s1, sizeof(s1)), inet_fmt(qry->tr_src, s2, sizeof(s2)));
if (IN_MULTICAST(ntohl(dst)))
return;
errcode = TR_WRONG_IF;
}
}
else {
/*
* determine which interface the packet came in on
* RESP packets travel hop-by-hop so this either traversed
* a tunnel or came from a directly attached mrouter.
*/
if ((vifi = find_vif_direct(src)) == NO_VIF) {
IF_DEBUG(DEBUG_TRACE)
logit(LOG_DEBUG, 0, "Wrong interface for packet");
errcode = TR_WRONG_IF;
}
}
/* Now that we've decided to send a response, save the qid */
oqid = qry->tr_qid;
IF_DEBUG(DEBUG_TRACE)
logit(LOG_DEBUG, 0, "Sending traceroute response");
/* copy the packet to the sending buffer */
p = igmp_send_buf + IP_IGMP_HEADER_LEN + IGMP_MINLEN;
bcopy(data, p, datalen);
p += datalen;
/*
* If there is no room to insert our reply, coopt the previous hop
* error indication to relay this fact.
*/
if (p + sizeof(struct tr_resp) > igmp_send_buf + SEND_BUF_SIZE) {
resp = (struct tr_resp *)p - 1;
resp->tr_rflags = TR_NO_SPACE;
mrt = NULL;
goto sendit;
}
/*
* fill in initial response fields
*/
resp = (struct tr_resp *)p;
memset(resp, 0, sizeof(struct tr_resp));
datalen += RLEN;
resp->tr_qarr = htonl(((tp.tv_sec + JAN_1970) << 16) +
((tp.tv_usec << 10) / 15625));
resp->tr_rproto = PROTO_PIM;
resp->tr_outaddr = (vifi == NO_VIF) ? dst : uvifs[vifi].uv_lcl_addr;
resp->tr_fttl = (vifi == NO_VIF) ? 0 : uvifs[vifi].uv_threshold;
resp->tr_rflags = errcode;
/*
* obtain # of packets out on interface
*/
v_req.vifi = vifi;
if (vifi != NO_VIF && ioctl(udp_socket, SIOCGETVIFCNT, (char *)&v_req) >= 0)
resp->tr_vifout = htonl(v_req.ocount);
else
resp->tr_vifout = 0xffffffff;
/*
* fill in scoping & pruning information
*/
/* TODO */
#if 0
if (mrt != (mrtentry_t *)NULL)
for (gt = rt->rt_groups; gt; gt = gt->gt_next) {
if (gt->gt_mcastgrp >= group)
break;
}
else
gt = NULL;
if (gt && gt->gt_mcastgrp == group) {
struct stable *st;
for (st = gt->gt_srctbl; st; st = st->st_next)
if (qry->tr_src == st->st_origin)
break;
sg_req.src.s_addr = qry->tr_src;
sg_req.grp.s_addr = group;
if (st && st->st_ctime != 0 &&
ioctl(udp_socket, SIOCGETSGCNT, (char *)&sg_req) >= 0)
resp->tr_pktcnt = htonl(sg_req.pktcnt + st->st_savpkt);
else
resp->tr_pktcnt = htonl(st ? st->st_savpkt : 0xffffffff);
if (VIFM_ISSET(vifi, gt->gt_scope))
resp->tr_rflags = TR_SCOPED;
else if (gt->gt_prsent_timer)
resp->tr_rflags = TR_PRUNED;
else if (!VIFM_ISSET(vifi, gt->gt_grpmems))
if (VIFM_ISSET(vifi, rt->rt_children) &&
NBRM_ISSETMASK(uvifs[vifi].uv_nbrmap, rt->rt_subordinates)) /*XXX*/
resp->tr_rflags = TR_OPRUNED;
else
resp->tr_rflags = TR_NO_FWD;
} else {
if (scoped_addr(vifi, group))
resp->tr_rflags = TR_SCOPED;
else if (rt && !VIFM_ISSET(vifi, rt->rt_children))
resp->tr_rflags = TR_NO_FWD;
}
#endif /* 0 */
/*
* if no rte exists, set NO_RTE error
*/
if (mrt == (mrtentry_t *)NULL) {
src = dst; /* the dst address of resp. pkt */
resp->tr_inaddr = 0;
resp->tr_rflags = TR_NO_RTE;
resp->tr_rmtaddr = 0;
} else {
/* get # of packets in on interface */
v_req.vifi = mrt->incoming;
if (ioctl(udp_socket, SIOCGETVIFCNT, (char *)&v_req) >= 0)
resp->tr_vifin = htonl(v_req.icount);
else
resp->tr_vifin = 0xffffffff;
/* TODO
MASK_TO_VAL(rt->rt_originmask, resp->tr_smask);
*/
src = uvifs[mrt->incoming].uv_lcl_addr;
resp->tr_inaddr = src;
if (mrt->upstream != (pim_nbr_entry_t *)NULL)
parent_address = mrt->upstream->address;
else
parent_address = INADDR_ANY;
resp->tr_rmtaddr = parent_address;
if (!VIFM_ISSET(vifi, mrt->oifs)) {
IF_DEBUG(DEBUG_TRACE)
logit(LOG_DEBUG, 0, "Destination %s not on forwarding tree for src %s",
inet_fmt(qry->tr_dst, s1, sizeof(s1)), inet_fmt(qry->tr_src, s2, sizeof(s2)));
resp->tr_rflags = TR_WRONG_IF;
}
#if 0
if (rt->rt_metric >= UNREACHABLE) {
resp->tr_rflags = TR_NO_RTE;
/* Hack to send reply directly */
rt = NULL;
}
#endif /* 0 */
}
sendit:
/*
* if metric is 1 or no. of reports is 1, send response to requestor
* else send to upstream router. If the upstream router can't handle
* mtrace, set an error code and send to requestor anyway.
*/
IF_DEBUG(DEBUG_TRACE)
logit(LOG_DEBUG, 0, "rcount:%d, no:%d", rcount, no);
if ((rcount + 1 == no) || (mrt == NULL) || (mrt->metric == 1)) {
resptype = IGMP_MTRACE_RESP;
dst = qry->tr_raddr;
} else
#if 0 /* TODO */
if (!can_mtrace(rt->rt_parent, rt->rt_gateway)) {
dst = qry->tr_raddr;
resp->tr_rflags = TR_OLD_ROUTER;
resptype = IGMP_MTRACE_RESP;
} else {
#endif /* 0 */
if (mrt->upstream != (pim_nbr_entry_t *)NULL)
parent_address = mrt->upstream->address;
else
parent_address = INADDR_ANY;
dst = parent_address;
resptype = IGMP_MTRACE;
#if 0 /* TODO */
}
#endif
if (IN_MULTICAST(ntohl(dst))) {
/*
* Send the reply on a known multicast capable vif.
* If we don't have one, we can't source any multicasts anyway.
*/
if (phys_vif != -1) {
IF_DEBUG(DEBUG_TRACE)
logit(LOG_DEBUG, 0, "Sending reply to %s from %s",
inet_fmt(dst, s1, sizeof(s1)),
inet_fmt(uvifs[phys_vif].uv_lcl_addr, s2, sizeof(s2)));
k_set_ttl(igmp_socket, qry->tr_rttl);
send_igmp(igmp_send_buf, uvifs[phys_vif].uv_lcl_addr, dst,
resptype, no, group, datalen);
k_set_ttl(igmp_socket, 1);
} else
logit(LOG_INFO, 0, "No enabled phyints -- %s",
"dropping traceroute reply");
} else {
IF_DEBUG(DEBUG_TRACE)
logit(LOG_DEBUG, 0, "Sending %s to %s from %s",
resptype == IGMP_MTRACE_RESP ? "reply" : "request on",
inet_fmt(dst, s1, sizeof(s1)), inet_fmt(src, s2, sizeof(s2)));
send_igmp(igmp_send_buf, src, dst, resptype, no, group, datalen);
}
}
/*
* Send a list of all of our neighbors to the requestor, `src'.
* Used for mrinfo support.
* XXX: currently, we cannot specify the used multicast routing protocol;
* only a protocol version is returned.
*/
void accept_neighbor_request2(u_int32 src, u_int32 dst __attribute__((unused)))
{
vifi_t vifi;
struct uvif *v;
u_char *p, *ncount;
/* struct listaddr *la; */
pim_nbr_entry_t *pim_nbr;
int datalen;
u_int32 them = src;
p = (u_char *) (igmp_send_buf + IP_IGMP_HEADER_LEN + IGMP_MINLEN);
datalen = 0;
for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++) {
u_int32 vflags = v->uv_flags;
u_char rflags = 0;
if (vflags & VIFF_TUNNEL)
rflags |= DVMRP_NF_TUNNEL;
if (vflags & VIFF_SRCRT)
rflags |= DVMRP_NF_SRCRT;
if (vflags & VIFF_PIM_NBR)
rflags |= DVMRP_NF_PIM;
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;
pim_nbr = v->uv_pim_neighbors;
if (pim_nbr == (pim_nbr_entry_t *)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(igmp_send_buf, INADDR_ANY, them, IGMP_DVMRP,
DVMRP_NEIGHBORS2, htonl(PIMD_LEVEL), datalen);
p = (u_char *) (igmp_send_buf + IP_IGMP_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 ( ; pim_nbr; pim_nbr = pim_nbr->next) {
/* Make sure that there's room for this neighbor... */
if (datalen + (ncount == 0 ? 4+4+4 : 4) > MAX_DVMRP_DATA_LEN) {
send_igmp(igmp_send_buf, INADDR_ANY, them, IGMP_DVMRP,
DVMRP_NEIGHBORS2, htonl(PIMD_LEVEL), datalen);
p = (u_char *) (igmp_send_buf + IP_IGMP_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 = pim_nbr->address;
p += 4;
datalen += 4;
(*ncount)++;
}
}
}
if (datalen != 0)
send_igmp(igmp_send_buf, INADDR_ANY, them, IGMP_DVMRP,
DVMRP_NEIGHBORS2, htonl(PIMD_LEVEL), datalen);
}