+u8 *
+format_tcp_options (u8 *s, va_list *args)
+{
+ tcp_options_t *opts = va_arg (*args, tcp_options_t *);
+ u32 indent, n_opts = 0;
+ int i;
+
+ if (!opts->flags)
+ return s;
+
+ indent = format_get_indent (s);
+ indent += 2;
+
+ s = format (s, "options:\n%U", format_white_space, indent);
+
+ if (tcp_opts_mss (opts))
+ {
+ s = format (s, "mss %d", opts->mss);
+ n_opts++;
+ }
+ if (tcp_opts_wscale (opts))
+ {
+ s = format (s, "%swindow scale %d", n_opts > 0 ? ", " : "",
+ format_white_space, indent, opts->wscale);
+ n_opts++;
+ }
+ if (tcp_opts_tstamp (opts))
+ {
+ s = format (s, "%stimestamp %d, echo/reflected timestamp",
+ n_opts > 0 ? ", " : "", format_white_space, indent,
+ opts->tsval, opts->tsecr);
+ n_opts++;
+ }
+ if (tcp_opts_sack_permitted (opts))
+ {
+ s = format (s, "%ssack permitted", n_opts > 0 ? ", " : "",
+ format_white_space, indent);
+ n_opts++;
+ }
+ if (tcp_opts_sack (opts))
+ {
+ s = format (s, "%ssacks:", n_opts > 0 ? ", " : "", format_white_space,
+ indent);
+ for (i = 0; i < opts->n_sack_blocks; ++i)
+ {
+ s = format (s, "\n%Ublock %d: start %d, end %d", format_white_space,
+ indent + 2, i + 1, opts->sacks[i].start,
+ opts->sacks[i].end);
+ }
+ n_opts++;
+ }
+
+ return s;
+}
+