tag	line	file	source code
send_fin	2478	net/ipv4/tcp.c	int send_fin=0;
send_fin	2486	net/ipv4/tcp.c	send_fin=1;
send_fin	2499	net/ipv4/tcp.c	send_fin=1;
send_fin	2522	net/ipv4/tcp.c	return send_fin;