tag	line	file	source code
IPPROTO_IPIP	178	drivers/net/tunnel.c	if ( iph->protocol == IPPROTO_IPIP && iph->saddr == dev->pa_addr )
IPPROTO_IPIP	229	drivers/net/tunnel.c	iph->protocol = IPPROTO_IPIP;
IPPROTO_IPIP	71	net/ipv4/ipip.c	IPPROTO_IPIP,         /* protocol ID          */
IPPROTO_IPIP	55	net/ipv4/protocol.c	IPPROTO_IPIP,         /* protocol ID          */