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net_modem: fix response to unrecognized will/wont telnet commands

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This commit is contained in:
David Hrdlička
2025-03-23 16:18:48 +01:00
parent 609f34cc49
commit 97707a9831
1 changed files with 8 additions and 2 deletions
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10
src/network/net_modem.c
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@@ -1177,9 +1177,15 @@ modem_process_telnet(modem_t *modem, uint8_t *data, uint32_t size)
uint8_t c = data[i];
if (modem->telClient.inIAC) {
if (modem->telClient.recCommand) {
modem_log("modem_process_telnet: received command %i, option %i\n", modem->telClient.command, c);
if ((c != 0) && (c != 1) && (c != 3)) {
if (modem->telClient.command > 250) {
/* Reject anything we don't recognize */
/* Reject anything we don't recognize */
if (modem->telClient.command == 251 || modem->telClient.command == 252) {
modem_data_mode_process_byte(modem, 0xff);
modem_data_mode_process_byte(modem, 254);
modem_data_mode_process_byte(modem, c); /* Don't do crap! */
} else if (modem->telClient.command == 253 || modem->telClient.command == 254) {
modem_data_mode_process_byte(modem, 0xff);
modem_data_mode_process_byte(modem, 252);
modem_data_mode_process_byte(modem, c); /* We won't do crap! */