Hello, 2.4.17 kernel. I am having troubles understanding how to implement options (of possibly variable length) in my transport protocol (similar to TCP-options). For the fixed fields I just extend the structure describing my packet's header and it works fine. However, where should I place the parsing required for a variable-length list of options? I know I'll need a function similar to net/ipv4/tcp_input.c : tcp_parse_options. I believe I'll have to do the parsing of 'skb->data' in my receiving function, but how do I (if at all) decribe those options in include/linux/skbuff.h : skbuff structure? I mean, tcp, for instance, doesn't have any options defined in struct tcphdr, but the options _are_ the part of a packet's header... So which part of the code actually divides the options (which apparently are not defined in the structure describing the header) from the user's data? I'll appreciate any help. -marek - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
