static void igmp_timer_expire(unsigned long data)
{
struct ip_mc_list *im=(struct ip_mc_list *)data;
struct in_device *in_dev = im->interface;
int err;
im->tm_running=0;
if (IGMP_V1_SEEN(in_dev))
err = igmp_send_report(in_dev->dev, im->multiaddr, IGMP_HOST_MEMBERSHIP_REPORT);
else
err = igmp_send_report(in_dev->dev, im->multiaddr, IGMP_HOST_NEW_MEMBERSHIP_REPORT);
/* Failed. Retry later. */
if (err) {
igmp_start_timer(im, IGMP_Unsolicited_Report_Interval);
return;
}
if (im->unsolicit_count) {
im->unsolicit_count--;
igmp_start_timer(im, IGMP_Unsolicited_Report_Interval);
}
im->reporter = 1;
}
static void igmp_heard_query(struct device *dev)
{
struct ip_mc_list *im;
for(im=dev->ip_mc_list;im!=NULL;im=im->next)
if(!im->tm_running && im->multiaddr!=IGMP_ALL_HOSTS)
igmp_start_timer(im);
}
static void igmp_group_added(struct ip_mc_list *im)
{
if (im->loaded == 0) {
im->loaded = 1;
ip_mc_filter_add(im->interface, im->multiaddr);
}
#ifdef CONFIG_IP_MULTICAST
if (im->multiaddr == IGMP_ALL_HOSTS)
return;
start_bh_atomic();
igmp_start_timer(im, IGMP_Initial_Report_Delay);
end_bh_atomic();
#endif
}
static void igmp_mod_timer(struct ip_mc_list *im, int max_delay)
{
spin_lock_bh(&im->lock);
im->unsolicit_count = 0;
if (del_timer(&im->timer)) {
if ((long)(im->timer.expires-jiffies) < max_delay) {
add_timer(&im->timer);
im->tm_running=1;
spin_unlock_bh(&im->lock);
return;
}
atomic_dec(&im->refcnt);
}
igmp_start_timer(im, max_delay);
spin_unlock_bh(&im->lock);
}
static void igmp_timer_expire(unsigned long data)
{
struct ip_mc_list *im=(struct ip_mc_list *)data;
struct in_device *in_dev = im->interface;
spin_lock(&im->lock);
im->tm_running=0;
if (im->unsolicit_count) {
im->unsolicit_count--;
igmp_start_timer(im, IGMP_Unsolicited_Report_Interval);
}
im->reporter = 1;
spin_unlock(&im->lock);
if (IGMP_V1_SEEN(in_dev))
igmp_send_report(in_dev->dev, im->multiaddr, IGMP_HOST_MEMBERSHIP_REPORT);
else
igmp_send_report(in_dev->dev, im->multiaddr, IGMP_HOST_NEW_MEMBERSHIP_REPORT);
ip_ma_put(im);
}
static void igmp_heard_query(struct in_device *in_dev, unsigned char max_resp_time,
u32 group)
{
struct ip_mc_list *im;
int max_delay;
max_delay = max_resp_time*(HZ/IGMP_TIMER_SCALE);
if (max_resp_time == 0) {
/* Alas, old v1 router presents here. */
max_delay = IGMP_Query_Response_Interval;
in_dev->mr_v1_seen = jiffies + IGMP_V1_Router_Present_Timeout;
group = 0;
}
/*
* - Start the timers in all of our membership records
* that the query applies to for the interface on
* which the query arrived excl. those that belong
* to a "local" group (224.0.0.X)
* - For timers already running check if they need to
* be reset.
* - Use the igmp->igmp_code field as the maximum
* delay possible
*/
for (im=in_dev->mc_list; im!=NULL; im=im->next) {
if (group && group != im->multiaddr)
continue;
if (im->multiaddr == IGMP_ALL_HOSTS)
continue;
im->unsolicit_count = 0;
if (im->tm_running && (long)(im->timer.expires-jiffies) > max_delay)
igmp_stop_timer(im);
igmp_start_timer(im, max_delay);
}
}
static void igmp_heard_query(struct device *dev,unsigned char max_resp_time)
{
struct ip_mc_list *im;
int mrouter_type;
/*
* The max_resp_time is in units of 1/10 second.
*/
if(max_resp_time>0)
{
mrouter_type=IGMP_NEW_ROUTER;
if(igmp_set_mrouter_info(dev,mrouter_type,0)==NULL)
return;
/*
* - Start the timers in all of our membership records
* that the query applies to for the interface on
* which the query arrived excl. those that belong
* to a "local" group (224.0.0.X)
* - For timers already running check if they need to
* be reset.
* - Use the igmp->igmp_code field as the maximum
* delay possible
*/
for(im=dev->ip_mc_list;im!=NULL;im=im->next)
{
if(im->tm_running)
{
if(im->timer.expires>jiffies+max_resp_time*HZ/IGMP_TIMER_SCALE)
{
igmp_stop_timer(im);
igmp_start_timer(im,max_resp_time);
}
}
else
{
if((im->multiaddr & IGMP_LOCAL_GROUP_MASK)!=IGMP_LOCAL_GROUP)
igmp_start_timer(im,max_resp_time);
}
}
}
else
{
mrouter_type=IGMP_OLD_ROUTER;
max_resp_time=IGMP_MAX_HOST_REPORT_DELAY*IGMP_TIMER_SCALE;
if(igmp_set_mrouter_info(dev,mrouter_type,IGMP_AGE_THRESHOLD)==NULL)
return;
/*
* Start the timers in all of our membership records for
* the interface on which the query arrived, except those
* that are already running and those that belong to a
* "local" group (224.0.0.X).
*/
for(im=dev->ip_mc_list;im!=NULL;im=im->next)
{
if(!im->tm_running && (im->multiaddr & IGMP_LOCAL_GROUP_MASK)!=IGMP_LOCAL_GROUP)
igmp_start_timer(im,max_resp_time);
}
}
}