JNIEXPORT void JNICALL Java_ow_ipmulticast_Native_joinGroup(JNIEnv *env, jclass clazz,
jint group, jint ifLocalAddr, jint ifIndex) {
struct uvif u;
u.uv_ifindex = (int)ifIndex;
u.uv_lcl_addr = (uint32_t)htonl(ifLocalAddr);
k_join(sock_dgram_send, (uint32_t)htonl(group), &u);
}
/*
* Initialize the vif and add to the kernel. The vif can be either
* physical, register or tunnel (tunnels will be used in the future
* when this code becomes PIM multicast boarder router.
*/
void start_vif (mifi_t vifi)
{
struct uvif *v;
v = &uvifs[vifi];
/* Initialy no router on any vif */
if( v-> uv_flags & MIFF_REGISTER)
v->uv_flags = v->uv_flags & ~VIFF_DOWN;
else
{
v->uv_flags =
(v->uv_flags | VIFF_NONBRS) & ~ VIFF_DOWN;
v->uv_pim_hello_timer = 1 + RANDOM() % pim_hello_period;
v->uv_jp_timer = 1 + RANDOM() % pim_join_prune_period;
v->uv_genid = RANDOM() & 0xffffffff;
}
/* Tell kernel to add, i.e. start this vif */
k_add_vif(mld6_socket,vifi,&uvifs[vifi]);
IF_DEBUG(DEBUG_IF)
log_msg(LOG_DEBUG,0,"%s comes up ,vif #%u now in service",v->uv_name,vifi);
if (!(v->uv_flags & MIFF_REGISTER)) {
/*
* Join the PIM multicast group on the interface.
*/
k_join(pim6_socket, &allpim6routers_group.sin6_addr,
v->uv_ifindex);
/*
* Join the ALL-ROUTERS multicast group on the interface.
* This allows mtrace requests to loop back if they are run
* on the multicast router.this allow receiving mld6 messages too.
*/
k_join(mld6_socket, &allrouters_group.sin6_addr, v->uv_ifindex);
/*
* 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 (!v->uv_querier) {
v->uv_querier = (struct listaddr *)malloc(sizeof(struct listaddr));
memset(v->uv_querier, 0, sizeof(struct listaddr));
}
v->uv_querier->al_addr = v->uv_linklocal->pa_addr;
v->uv_querier->al_timer = MLD6_OTHER_QUERIER_PRESENT_INTERVAL;
time(&v->uv_querier->al_ctime); /* reset timestamp */
v->uv_stquery_cnt = MLD6_STARTUP_QUERY_COUNT;
#ifdef HAVE_MLDV2
if (v->uv_mld_version & MLDv2)
query_groupsV2(v);
else
#endif
if (v->uv_mld_version & MLDv1)
query_groups(v);
/*
* Send a probe via the new vif to look for neighbors.
*/
send_pim6_hello(v, pim_hello_holdtime);
}
}