static
void rec_do(struct connectdata *conn, int option)
{
struct TELNET *tn = (struct TELNET *)conn->data->req.protop;
switch(tn->us[option]) {
case CURL_NO:
if(tn->us_preferred[option] == CURL_YES) {
tn->us[option] = CURL_YES;
send_negotiation(conn, CURL_WILL, option);
if(tn->subnegotiation[option] == CURL_YES)
/* transmission of data option */
sendsuboption(conn, option);
}
else if(tn->subnegotiation[option] == CURL_YES) {
/* send information to achieve this option*/
tn->us[option] = CURL_YES;
send_negotiation(conn, CURL_WILL, option);
sendsuboption(conn, option);
}
else
send_negotiation(conn, CURL_WONT, option);
break;
case CURL_YES:
/* Already enabled */
break;
case CURL_WANTNO:
switch(tn->usq[option]) {
case CURL_EMPTY:
/* Error: DONT answered by WILL */
tn->us[option] = CURL_NO;
break;
case CURL_OPPOSITE:
/* Error: DONT answered by WILL */
tn->us[option] = CURL_YES;
tn->usq[option] = CURL_EMPTY;
break;
}
break;
case CURL_WANTYES:
switch(tn->usq[option]) {
case CURL_EMPTY:
tn->us[option] = CURL_YES;
if(tn->subnegotiation[option] == CURL_YES) {
/* transmission of data option */
sendsuboption(conn, option);
}
break;
case CURL_OPPOSITE:
tn->us[option] = CURL_WANTNO;
tn->himq[option] = CURL_EMPTY;
send_negotiation(conn, CURL_WONT, option);
break;
}
break;
}
}
static
void rec_do(struct connectdata *conn, int option)
{
struct TELNET *tn = (struct TELNET *)conn->data->reqdata.proto.telnet;
switch(tn->us[option])
{
case CURL_NO:
if(tn->us_preferred[option] == CURL_YES)
{
tn->us[option] = CURL_YES;
send_negotiation(conn, CURL_WILL, option);
}
else
{
send_negotiation(conn, CURL_WONT, option);
}
break;
case CURL_YES:
/* Already enabled */
break;
case CURL_WANTNO:
switch(tn->usq[option])
{
case CURL_EMPTY:
/* Error: DONT answered by WILL */
tn->us[option] = CURL_NO;
break;
case CURL_OPPOSITE:
/* Error: DONT answered by WILL */
tn->us[option] = CURL_YES;
tn->usq[option] = CURL_EMPTY;
break;
}
break;
case CURL_WANTYES:
switch(tn->usq[option])
{
case CURL_EMPTY:
tn->us[option] = CURL_YES;
break;
case CURL_OPPOSITE:
tn->us[option] = CURL_WANTNO;
tn->himq[option] = CURL_EMPTY;
send_negotiation(conn, CURL_WONT, option);
break;
}
break;
}
}
static
void rec_dont(struct connectdata *conn, int option)
{
struct TELNET *tn = (struct TELNET *)conn->data->reqdata.proto.telnet;
switch(tn->us[option])
{
case CURL_NO:
/* Already disabled */
break;
case CURL_YES:
tn->us[option] = CURL_NO;
send_negotiation(conn, CURL_WONT, option);
break;
case CURL_WANTNO:
switch(tn->usq[option])
{
case CURL_EMPTY:
tn->us[option] = CURL_NO;
break;
case CURL_OPPOSITE:
tn->us[option] = CURL_WANTYES;
tn->usq[option] = CURL_EMPTY;
send_negotiation(conn, CURL_WILL, option);
break;
}
break;
case CURL_WANTYES:
switch(tn->usq[option])
{
case CURL_EMPTY:
tn->us[option] = CURL_NO;
break;
case CURL_OPPOSITE:
tn->us[option] = CURL_NO;
tn->usq[option] = CURL_EMPTY;
break;
}
break;
}
}
static void
set_local_option(struct connectdata *conn, int option, int newstate)
{
struct TELNET *tn = (struct TELNET *)conn->data->reqdata.proto.telnet;
if(newstate == CURL_YES)
{
switch(tn->us[option])
{
case CURL_NO:
tn->us[option] = CURL_WANTYES;
send_negotiation(conn, CURL_WILL, option);
break;
case CURL_YES:
/* Already enabled */
break;
case CURL_WANTNO:
switch(tn->usq[option])
{
case CURL_EMPTY:
/* Already negotiating for CURL_YES, queue the request */
tn->usq[option] = CURL_OPPOSITE;
break;
case CURL_OPPOSITE:
/* Error: already queued an enable request */
break;
}
break;
case CURL_WANTYES:
switch(tn->usq[option])
{
case CURL_EMPTY:
/* Error: already negotiating for enable */
break;
case CURL_OPPOSITE:
tn->usq[option] = CURL_EMPTY;
break;
}
break;
}
}
else /* NO */
{
switch(tn->us[option])
{
case CURL_NO:
/* Already disabled */
break;
case CURL_YES:
tn->us[option] = CURL_WANTNO;
send_negotiation(conn, CURL_WONT, option);
break;
case CURL_WANTNO:
switch(tn->usq[option])
{
case CURL_EMPTY:
/* Already negotiating for NO */
break;
case CURL_OPPOSITE:
tn->usq[option] = CURL_EMPTY;
break;
}
break;
case CURL_WANTYES:
switch(tn->usq[option])
{
case CURL_EMPTY:
tn->usq[option] = CURL_OPPOSITE;
break;
case CURL_OPPOSITE:
break;
}
break;
}
}
}
