PFTM_ICMP_FIRST_PACKET
s->timeout = PFTM_ICMP_FIRST_PACKET;
my_timeout[PFTM_ICMP_FIRST_PACKET] = 20; /* First ICMP packet */
pf->timeout[PFTM_ICMP_FIRST_PACKET] = PFTM_ICMP_FIRST_PACKET_VAL;
{ "icmp.first", PFTM_ICMP_FIRST_PACKET },