IGMP crashes with division by zero:
/**
* Start a timer for an igmp group
*
* @param group the igmp_group for which to start a timer
* @param max_time the time in multiples of IGMP_TMR_INTERVAL (decrease with
* every call to igmp_tmr())
*/
static void
igmp_start_timer(struct igmp_group *group, u8_t max_time)
{
/* ensure the input value is > 0 */
if (max_time == 0) {
max_time = 1;
}
/* ensure the random value is > 0 */
group->timer = (LWIP_RAND() % (max_time - 1)) + 1;
}
If called with max_time = 1.
Should read:
static void
igmp_start_timer(struct igmp_group *group, u8_t max_time)
{
/* ensure the input value is > 0 */
if (max_time < 2) {
max_time = 2;
}
/* ensure the random value is > 0 */
group->timer = (LWIP_RAND() % (max_time - 1)) + 1;
}
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