From 93511df0124fe053678a627f2ed1de1b28e407af Mon Sep 17 00:00:00 2001
From: rswindell <>
Date: Fri, 15 Oct 2004 00:56:19 +0000
Subject: [PATCH] Added support for Telnet NAWS (Negotiate About Window Size)
and Terminal Speed options. The NAWS option is particularlly nice as we don't
need ANSI cursor posistion reports to auto-detect screen size. If the user's
account is configured for auto-screen length detection and using a telnet
client that supports NAWS, the screen length will be dynamically updated (!).
---
src/sbbs3/main.cpp | 44 +++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 43 insertions(+), 1 deletion(-)
diff --git a/src/sbbs3/main.cpp b/src/sbbs3/main.cpp
index 631757242f..b954ff30b1 100644
--- a/src/sbbs3/main.cpp
+++ b/src/sbbs3/main.cpp
@@ -1066,7 +1066,34 @@ static BYTE* telnet_interpret(sbbs_t* sbbs, BYTE* inbuf, int inlen,
,sbbs->cfg.node_num
,sbbs->telnet_mode&TELNET_MODE_GATE ? "passed-through" : "received"
,sbbs->terminal);
- }
+
+ } else if(option==TELNET_TERM_SPEED
+ && sbbs->telnet_cmd[3]==TELNET_TERM_IS) {
+ char speed[128];
+ sprintf(speed,"%.*s",(int)sbbs->telnet_cmdlen-6,sbbs->telnet_cmd+4);
+ lprintf(LOG_DEBUG,"Node %d %s telnet terminal speed: %s"
+ ,sbbs->cfg.node_num
+ ,sbbs->telnet_mode&TELNET_MODE_GATE ? "passed-through" : "received"
+ ,speed);
+
+ } else if(option==TELNET_NEGOTIATE_WINDOW_SIZE) {
+ long cols = (sbbs->telnet_cmd[3]<<8) | sbbs->telnet_cmd[4];
+ long rows = (sbbs->telnet_cmd[5]<<8) | sbbs->telnet_cmd[6];
+ lprintf(LOG_DEBUG,"Node %d %s telnet window size: %ux%u"
+ ,sbbs->cfg.node_num
+ ,sbbs->telnet_mode&TELNET_MODE_GATE ? "passed-through" : "received"
+ ,sbbs->cols
+ ,sbbs->rows);
+ if(rows && !sbbs->useron.rows) /* auto-detect rows */
+ sbbs->rows=rows;
+ if(cols)
+ sbbs->cols=cols;
+
+ } else if(startup->options&BBS_OPT_DEBUG_TELNET)
+ lprintf(LOG_DEBUG,"Node %d %s unsupported telnet sub-negotiation cmd: %s"
+ ,sbbs->cfg.node_num
+ ,sbbs->telnet_mode&TELNET_MODE_GATE ? "passed-through" : "received"
+ ,telnet_opt_desc(option));
sbbs->telnet_cmdlen=0;
}
}
@@ -1099,7 +1126,9 @@ static BYTE* telnet_interpret(sbbs_t* sbbs, BYTE* inbuf, int inlen,
case TELNET_BINARY_TX:
case TELNET_ECHO:
case TELNET_TERM_TYPE:
+ case TELNET_TERM_SPEED:
case TELNET_SUP_GA:
+ case TELNET_NEGOTIATE_WINDOW_SIZE:
sbbs->telnet_remote_option[option]=command;
sbbs->send_telnet_cmd(telnet_opt_ack(command),option);
break;
@@ -1122,6 +1151,19 @@ static BYTE* telnet_interpret(sbbs_t* sbbs, BYTE* inbuf, int inlen,
,TELNET_IAC,TELNET_SE);
sbbs->putcom(buf,6);
}
+ else if(command==TELNET_WILL && option==TELNET_TERM_SPEED) {
+ if(startup->options&BBS_OPT_DEBUG_TELNET)
+ lprintf(LOG_DEBUG,"Node %d requesting telnet terminal speed"
+ ,sbbs->cfg.node_num);
+
+ char buf[64];
+ sprintf(buf,"%c%c%c%c%c%c"
+ ,TELNET_IAC,TELNET_SB
+ ,TELNET_TERM_SPEED,TELNET_TERM_SEND
+ ,TELNET_IAC,TELNET_SE);
+ sbbs->putcom(buf,6);
+ }
+
}
sbbs->telnet_cmdlen=0;
--
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