Re: Disable tcp MSS option in three way handshake?

thanks for the reply, I did a quick look at the code, as a quick dirty
hack, can I change the

 699 /* Set up TCP options for SYN-ACKs. */
 700 static unsigned int tcp_synack_options(struct sock *sk,
 701                                    struct request_sock *req,
 702                                    unsigned int mss, struct sk_buff *skb,
 703                                    struct tcp_out_options *opts,
 704                                    struct tcp_md5sig_key **md5,
 705                                    struct tcp_extend_values *xvp)
 706 {

..................
 730         /* We always send an MSS option. */
 731         opts->mss = mss; <---------here set opts->mss = 0 ?

would that work?

tcp_make_synack() calls tcp_options_write() has this:

        if (unlikely(opts->mss)) {
                *ptr++ = htonl((TCPOPT_MSS << 24) |
                               (TCPOLEN_MSS << 16) |
                               opts->mss);
        }

It will not add the option if opts->mss is zero, so this should work too.

Vijay