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From RDB: telnet can now start up in passive mode, in which it

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doesn't do any negotiation until the remote side does.

[originally from svn r1107]
This commit is contained in:
Simon Tatham
2001-05-09 13:51:07 +00:00
parent 7d86bbfbe2
commit d1d65fa6d0
4 changed files with 43 additions and 2 deletions
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27
telnet.c
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@ -175,6 +175,7 @@ static struct Opt *opts[] = {
};
static int echoing = TRUE, editing = TRUE;
static int activated = FALSE;
static int in_synch;
static int sb_opt, sb_len;
@ -226,6 +227,23 @@ static void option_side_effects(struct Opt *o, int enabled)
else if (o->option == TELOPT_SGA && o->send == DO)
editing = !enabled;
ldisc_send(NULL, 0); /* cause ldisc to notice the change */
/* Ensure we get the minimum options */
if (!activated) {
if (o_echo.state == INACTIVE) {
o_echo.state = REQUESTED;
send_opt(o_echo.send, o_echo.option);
}
if (o_we_sga.state == INACTIVE) {
o_we_sga.state = REQUESTED;
send_opt(o_we_sga.send, o_we_sga.option);
}
if (o_they_sga.state == INACTIVE) {
o_they_sga.state = REQUESTED;
send_opt(o_they_sga.send, o_they_sga.option);
}
activated = TRUE;
}
}
static void activate_option(struct Opt *o)
@ -603,12 +621,19 @@ static char *telnet_init(char *host, int port, char **realhost)
/*
* Initialise option states.
*/
{
if (cfg.passive_telnet) {
struct Opt **o;
for (o = opts; *o; o++)
if ((*o)->state == REQUESTED)
(*o)->state = INACTIVE;
} else {
struct Opt **o;
for (o = opts; *o; o++)
if ((*o)->state == REQUESTED)
send_opt((*o)->send, (*o)->option);
activated = TRUE;
}
/*