Hi, I want to know what the field, ihl in the struct iphdr is there for, I mean its function and the values it takes in different condition. Specifically, what is the condition when ihl>5. (See ip_input.c , line 497, depending on if ihl>5, some code is getting executed.) I am talking of 2.2.16 Sourav - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/