ICMP_EXC_TTL      127 net/ipv4/ip_forward.c 	icmp_send(skb, ICMP_TIME_EXCEEDED, ICMP_EXC_TTL, 0);
ICMP_EXC_TTL      420 net/ipv4/ip_gre.c 		if (code != ICMP_EXC_TTL)
ICMP_EXC_TTL      313 net/ipv4/ipip.c 		if (code != ICMP_EXC_TTL)
ICMP_EXC_TTL      440 net/ipv6/sit.c 		if (code != ICMP_EXC_TTL)