taglinefilesource code
max_header204net/inet/raw.clen + sk->prot->max_header,
max_header231net/inet/sock.hunsigned short  max_header;
max_header1049net/inet/tcp.cskb = prot->wmalloc(sk, sk->mtu + 128 + prot->max_header, 0, GFP_KERNEL);
max_header1059net/inet/tcp.cskb = prot->wmalloc(sk, copy + prot->max_header , 0, GFP_KERNEL);
max_header263net/inet/udp.csize = sk->prot->max_header + len;