tag	line	file	source code
IPPROTO_ICMP	240	net/ipv4/icmp.c	daddr, saddr, &icmp_param->replyopts, 0, IPPROTO_ICMP, 1);
IPPROTO_ICMP	301	net/ipv4/icmp.c	if(iph->protocol==IPPROTO_ICMP)
IPPROTO_ICMP	758	net/ipv4/icmp.c	if((err=ops->create(&icmp_socket, IPPROTO_ICMP))<0)
IPPROTO_ICMP	253	net/ipv4/ip_fw.c	ip->protocol == IPPROTO_UDP || ip->protocol == IPPROTO_ICMP))
IPPROTO_ICMP	308	net/ipv4/ip_fw.c	case IPPROTO_ICMP:
IPPROTO_ICMP	462	net/ipv4/ip_fw.c	case IPPROTO_ICMP:
IPPROTO_ICMP	100	net/ipv4/protocol.c	IPPROTO_ICMP,    /* protocol ID    */