From d19630bc7952a22acc11169be42f410e222fb904 Mon Sep 17 00:00:00 2001
From: "B. Watson" <urchlay@slackware.uk>
Date: Sun, 8 Mar 2026 07:12:34 -0400
Subject: Respond to incoming CTCPs.

---
 commands.txt | 20 +++++++++++++++++++-
 src/irc.c    | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 72 insertions(+), 1 deletion(-)

diff --git a/commands.txt b/commands.txt
index 9641d6d..eb7fa0b 100644
--- a/commands.txt
+++ b/commands.txt
@@ -16,6 +16,11 @@ Joins a channel, creates a new screen if possible. If a screen can't
 be created, channel text will be sent to the [server] screen, and
 "/m #channel" must be used, to send to the channel.
 
+/j1 <channel>
+/join1 <channel>
+Joins a channel without creating a new screen. Channel test will be
+sent to the [server] screen. Use "/m #channel" to send to the channel.
+
 /m <nick|channel> <text>
 /msg <nick|channel> <text>
 PRIVMSG to nick or channel.
@@ -36,11 +41,21 @@ Parts (leaves) a channel. If no #chan is given, the current screen's
 channel is parted (if you're in a channel screen). If there's a screen
 for the channel, it gets closed.
 
+/names [<channel>]
+Shows the list of users in a channel. Uses the current screen's channel,
+if no <channel> given. On most networks, it's not very useful to use
+/names on a channel you haven't joined.
+
+/topic [<channel>]
+Shows the channel topic and its creator. With no <channel>, uses the
+current screen's channel.
+
 /ping [<nick>]
 With no argument: ping the server. With arg: CTCP ping the nick.
 The contents of RTCLOK are sent as the ping data, so when the
 PONG response is received, the round-trip time can be shown, with
 up to 1/60 (NTSC) or 1/50 (PAL) second accuracy.
+TODO: not implemented yet.
 
 /me <action>
 CTCP ACTION. Only works in a channel or query screen (eventually
@@ -60,10 +75,13 @@ any arguments lists every channel on the server, which isn't useful.
 
 /color <bg> [<fg>] [<status-active>] [<status-highlight>]
 Set colors. This should be on a per-screen basis, eventually.
+TODO: this only takes bg and fg arguments, currently.
 
 /chans
 List all channels we've joined. This will actually be limited to
 something like 20 (who joins more than 20 channels anyway?)
+TODO: not implemented yet.
 
 /quote <cmd>
-Send raw IRC protocol.
+Send raw IRC protocol to the server. This bypasses local command
+parsing.
diff --git a/src/irc.c b/src/irc.c
index 3a57015..f5ac809 100644
--- a/src/irc.c
+++ b/src/irc.c
@@ -78,6 +78,54 @@ static void do_priv_nick(void) {
 	scr_print_active("* ");
 }
 
+/* FIXME: this isn't very fast */
+static void do_ctcp(void) {
+	static char *p, *ctcp_type, *resp;
+
+	resp = 0;
+	ctcp_type = ++msg_text; /* skip leading ^A */
+
+	if( (p = strchr(msg_text, '\x01')) ) {
+		/* kill trailing ^A */
+		*p = 0;
+	}
+
+	if( (p = strchr(msg_text, ' ')) ) {
+		*p++ = 0;
+	}
+
+	if(streq_i(ctcp_type, "ACTION")) {
+		scr_print_active("* ");
+		scr_print_active(msg_src);
+		scr_print_active(" ");
+		scr_print_active(p);
+		scr_eol_active();
+		return;
+	}
+
+	scr_print_active("*** Got CTCP ");
+	scr_print_active(ctcp_type);
+	scr_print_active(" request from ");
+	scr_print_active(msg_src);
+	scr_eol_active();
+
+	if(streq_i(ctcp_type, "PING")) {
+		resp = p;
+	} else if(streq_i(ctcp_type, "CLIENTINFO")) {
+		resp = "PING VERSION CLIENTINFO";
+	} else if(streq_i(ctcp_type, "VERSION")) {
+		resp = "FujiNetChat pre-alpha on an Atari 8-bit";
+	} else {
+		/* unknown CTCP type, ignore */
+		return;
+	}
+
+	txbuf_set_str3("NOTICE ", msg_src, " :\x01");
+	txbuf_append_str3(ctcp_type, " ", resp);
+	txbuf_append_str("\x01");
+	txbuf_send();
+}
+
 static void do_privmsg(void) {
 	/* TODO: this shouldn't be case-sensitive */
 	if(strstr(msg_text, usernick))
@@ -85,6 +133,11 @@ static void do_privmsg(void) {
 	else
 		hilite = 0;
 
+	if(*msg_text == '\x01') {
+		do_ctcp();
+		return;
+	}
+
 	if(*msg_dest == '#')
 		do_chan_nick();
 	else
-- 
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