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/*
* (c) BayCom GmbH, http://www.baycom.de, info@baycom.de
*
* See the COPYING file for copyright information and
* how to reach the author.
*
*/
#undef DEBUG
#include "headers.h"
extern pthread_mutex_t lock;
extern recv_info_t receivers;
extern int mld_start;
static pthread_t mld_send_reports_thread;
static char iface[IFNAMSIZ];
static int find_mcg_in_mld_mcas (struct in6_addr *mld_mca, int len, struct in6_addr *mcg)
{
int i;
for (i = 0; i < len; i++) {
if (!memcmp (mld_mca + i, mcg, sizeof (struct in6_addr))) {
return 1;
}
}
return 0;
}
//-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
typedef struct {
struct in6_addr *mld_mca_add;
struct in6_addr *mld_mca_drop;
} mld_reporter_context_t;
static void clean_mld_send_reports_thread(void *p)
{
mld_reporter_context_t *c=(mld_reporter_context_t*)p;
if(c->mld_mca_add) {
free(c->mld_mca_add);
}
if(c->mld_mca_drop) {
free(c->mld_mca_drop);
}
}
//-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
static void *mld_send_reports (void *arg)
{
recv_info_t *receivers = (recv_info_t *) arg;
int grec_num_drop;
int grec_num_add;
pid_info_t *p;
pid_info_t *ptmp;
recv_info_t *r;
int maxpids=128;
mld_reporter_context_t c;
memset(&c, 0, sizeof(mld_reporter_context_t));
c.mld_mca_add=(struct in6_addr *)malloc(maxpids*sizeof(struct in6_addr));
if (!c.mld_mca_add)
err ("mld_send_reports: out of memory\n");
c.mld_mca_drop=(struct in6_addr *)malloc(maxpids*sizeof(struct in6_addr));
if (!c.mld_mca_drop)
err ("mld_send_reports: out of memory\n");
pthread_cleanup_push (clean_mld_send_reports_thread, &c);
struct intnode *intn = int_find_name (iface);
if( !c.mld_mca_add || !c.mld_mca_drop) {
err ("Cannot get memory for add/drop list\n");
}
mld_start=1;
while (mld_start) {
grec_num_drop=0;
pthread_mutex_lock (&lock);
int pids=count_all_pids(receivers);
if(pids>maxpids) {
maxpids=pids;
c.mld_mca_add=(struct in6_addr *)realloc(c.mld_mca_add, pids*sizeof(struct in6_addr));
if (!c.mld_mca_add)
err ("mld_send_reports: out of memory\n");
c.mld_mca_drop=(struct in6_addr *)realloc(c.mld_mca_drop, pids*sizeof(struct in6_addr));
if (!c.mld_mca_drop)
err ("mld_send_reports: out of memory\n");
}
//Send listener reports for all recently dropped MCGs
DVBMC_LIST_FOR_EACH_ENTRY (r, &receivers->list, recv_info_t, list) {
DVBMC_LIST_FOR_EACH_ENTRY_SAFE (p, ptmp, &r->slots.list, pid_info_t, list) {
// prevent a somewhere running mcg on any device to be dropped and prevent to drop same mcg multiple times
if (!p->run) {
if ( p->dropped && !find_any_slot_by_mcg (receivers, &p->mcg) && !find_mcg_in_mld_mcas (c.mld_mca_drop, grec_num_drop, &p->mcg)) {
memcpy (c.mld_mca_drop + grec_num_drop++, &p->mcg.s6_addr, sizeof (struct in6_addr));
p->dropped--;
#ifdef DEBUG
char host[INET6_ADDRSTRLEN];
inet_ntop (AF_INET6, p->mcg.s6_addr, (char *) host, INET6_ADDRSTRLEN);
dbg ("DROP_GROUP %d %s\n", grec_num_drop, host);
#endif
} else {
dvbmc_list_remove(&p->list);
free(p);
}
}
}
}
if(grec_num_drop > maxpids) {
err ("Wrong number of pids: %d>%d\n", grec_num_drop, maxpids);
}
grec_num_add=0;
//Send listener reports for all current MCG in use
DVBMC_LIST_FOR_EACH_ENTRY (r, &receivers->list, recv_info_t, list) {
DVBMC_LIST_FOR_EACH_ENTRY (p, &r->slots.list, pid_info_t, list) {
if (p->run && !find_mcg_in_mld_mcas (c.mld_mca_add, grec_num_add, &p->mcg)) {
memcpy (c.mld_mca_add + grec_num_add++, p->mcg.s6_addr, sizeof (struct in6_addr));
#ifdef DEBUG
char host[INET6_ADDRSTRLEN];
inet_ntop (AF_INET6, &p->mcg.s6_addr, (char *) host, INET6_ADDRSTRLEN);
dbg ("ADD_GROUP %d %s\n", grec_num_add, host);
#endif
}
}
}
if(grec_num_add > maxpids) {
err ("Wrong number of pids: %d>%d\n", grec_num_add, maxpids);
}
pthread_mutex_unlock (&lock);
if (intn && intn->mtu) {
if (grec_num_drop) {
send_mldv2_report (intn, grec_num_drop, c.mld_mca_drop, 0, NULL, MLD2_MODE_IS_INCLUDE);
}
if (grec_num_add) {
send_mldv2_report (intn, grec_num_add, c.mld_mca_add, 0, NULL, MLD2_MODE_IS_EXCLUDE);
}
}
usleep (REP_TIME);
pthread_testcancel();
}
pthread_cleanup_pop (1);
return NULL;
}
//-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
int mld_client_init (char *intf)
{
if(intf) {
strcpy(iface, intf);
} else {
iface[0]=0;
}
if (!strlen (iface)) {
struct intnode *intn = int_find_first ();
if (intn) {
strcpy (iface, intn->name);
} else {
warn ("Cannot find any usable network interface\n");
return -1;
}
}
#if ! (defined WIN32 || defined APPLE)
g_conf->rawsocket = socket (PF_PACKET, SOCK_DGRAM, htons (ETH_P_ALL));
#endif
#ifdef WIN32
g_conf->rawsocket = socket (PF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
#endif
#ifdef APPLE
g_conf->rawsocket = socket (PF_INET6, SOCK_RAW, IPPROTO_HOPOPTS);
#endif
if (g_conf->rawsocket < 0) {
warn ("Cannot get a packet socket\n");
return -1;
}
#ifdef WIN32
#define IPV6_HDRINCL 2
DWORD n=1;
if (setsockopt (g_conf->rawsocket, IPPROTO_IPV6, IPV6_HDRINCL, (char *)&n, sizeof (n)) < 0) {
err ("setsockopt IPV6_HDRINCL");
}
int idx;
if ((idx = if_nametoindex (iface))>0) {
int ret=setsockopt (g_conf->rawsocket, IPPROTO_IPV6, IPV6_MULTICAST_IF, (_SOTYPE)&idx, sizeof (idx));
if(ret<0) {
warn("setsockopt for IPV6_MULTICAST_IF failed with %d error %s (%d)\n",ret,strerror (errno), errno);
}
}
#endif
pthread_create (&mld_send_reports_thread, NULL, mld_send_reports, &receivers);
return 0;
}
//-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
void mld_client_exit (void)
{
if(g_conf) {
mld_start=0;
if(pthread_exist(mld_send_reports_thread)) {
if(pthread_exist(mld_send_reports_thread) && !pthread_cancel (mld_send_reports_thread)) {
pthread_join (mld_send_reports_thread, NULL);
}
}
#if 0
struct intnode *intn;
unsigned int i;
for (i = 0; i < g_conf->maxinterfaces; i++) {
intn = &g_conf->ints[i];
if (intn->mtu == 0)
continue;
int_destroy (intn);
}
#endif
closesocket(g_conf->rawsocket);
}
}
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