taglinefilesource code
ip_hdrincl213include/net/sock.hunsigned char    ip_hdrincl;    /* Include headers ? */
ip_hdrincl724net/ipv4/af_inet.csk->ip_hdrincl=1;
ip_hdrincl726net/ipv4/af_inet.csk->ip_hdrincl=0;
ip_hdrincl2137net/ipv4/ip.csk->ip_hdrincl=val?1:0;
ip_hdrincl2382net/ipv4/ip.cval=sk->ip_hdrincl;
ip_hdrincl2580net/ipv4/ip.cif(!sk->ip_hdrincl)
ip_hdrincl2621net/ipv4/ip.cif(!sk->ip_hdrincl)
ip_hdrincl2660net/ipv4/ip.cif (sk->ip_hdrincl && offset > 0)
ip_hdrincl2743net/ipv4/ip.cif(!sk->ip_hdrincl) 
ip_hdrincl222net/ipv4/raw.cif(sk->ip_hdrincl)