commit 9f58418765576950983b4a95c4f5f71f068f424f
from: Alexander Barton <alex@barton.de>
date: Sun Jan 17 13:20:07 2010 UTC

Implemented new "secure clients only" channel mode: +z

Only clients using a SSL encrypted connection to the server are
allowed to join such a channel.

But please note three things:

a) already joined clients are not checked when setting this mode,
b) IRC operators are always allowed to join every channel, and
c) remote clients using a server not supporting this mode are not
   checked either and therefore always allowed to join.

commit - ef157715a00f565c8e17cf5618eb437b2df6d4bc
commit + 9f58418765576950983b4a95c4f5f71f068f424f
blob - 5a0a9dd5a7001f6defbdb6359bc2ef5cfb0da834
blob + 3457312b2d593f81c7cc1926bb31594595614c90
--- NEWS
+++ NEWS
@@ -1,7 +1,7 @@
 
                      ngIRCd - Next Generation IRC Server
 
-                        (c)2001-2009 Alexander Barton,
+                        (c)2001-2010 Alexander Barton,
                     alex@barton.de, http://www.barton.de/
 
                ngIRCd is free software and published under the
@@ -9,6 +9,16 @@
 
                                   -- NEWS --
 
+
+ngIRCd Release 16
+
+  - A new channel mode "secure connections only" (+z) has been implemented:
+    Only clients using a SSL encrypted connection to the server are allowed
+    to join such a channel.
+    But please note three things: a) already joined clients are not checked
+    when setting this mode, b) IRC operators are always allowed to join
+    every channel, and c) remote clients using a server not supporting this
+    mode are not checked either and therefore always allowed to join.
 
 ngIRCd Release 15 (2009-11-07)
 
blob - 010dd8ea4ee84ff906768f69c1b8eb5a1102f54c
blob + 94c7dd1e92a393ae24478cb037af1755cb25e334
--- src/ngircd/defines.h
+++ src/ngircd/defines.h
@@ -81,7 +81,7 @@
 					   in seconds. */
 
 #define USERMODES "aiorsw"		/* Supported user modes. */
-#define CHANMODES "biIklmnoPstv"	/* Supported channel modes. */
+#define CHANMODES "biIklmnoPstvz"	/* Supported channel modes. */
 
 #define CONNECTED true			/* Internal status codes. */
 #define DISCONNECTED false
blob - 010be3520d42b42f366e3bdabde946334cc48957
blob + 1014d3aa469f4b158b2e66842def42a66fba6878
--- src/ngircd/irc-channel.c
+++ src/ngircd/irc-channel.c
@@ -1,6 +1,6 @@
 /*
  * ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001-2008 Alexander Barton (alex@barton.de)
+ * Copyright (c)2001-2010 Alexander Barton (alex@barton.de)
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -93,7 +93,7 @@ join_allowed(CLIENT *Client, CHANNEL *chan, const char
 	}
 
 	channel_modes = Channel_Modes(chan);
-	if ((strchr(channel_modes, 'i')) && !is_invited) {
+	if (strchr(channel_modes, 'i') && !is_invited) {
 		/* Channel is "invite-only" and client is not on invite list */
 		IRC_WriteStrClient(Client, ERR_INVITEONLYCHAN_MSG,
 				   Client_ID(Client), channame);
@@ -108,10 +108,18 @@ join_allowed(CLIENT *Client, CHANNEL *chan, const char
 		return false;
 	}
 
-	if ((strchr(channel_modes, 'l')) &&
+	if (strchr(channel_modes, 'l') &&
 	    (Channel_MaxUsers(chan) <= Channel_MemberCount(chan))) {
 		/* There are more clints joined to this channel than allowed */
 		IRC_WriteStrClient(Client, ERR_CHANNELISFULL_MSG,
+				   Client_ID(Client), channame);
+		return false;
+	}
+
+	if (strchr(channel_modes, 'z') && !Conn_UsesSSL(Client_Conn(Client))) {
+		/* Only "secure" clients are allowed, but clients doesn't
+		 * use SSL encryption */
+		IRC_WriteStrClient(Client, ERR_SECURECHANNEL_MSG,
 				   Client_ID(Client), channame);
 		return false;
 	}
blob - 9509fb012bc615114cc9cd7dff97adbabdf01ad0
blob + d22d32f01acc3c82a787ecc375a6fe041cc57e39
--- src/ngircd/irc-mode.c
+++ src/ngircd/irc-mode.c
@@ -1,6 +1,6 @@
 /*
  * ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001-2008 Alexander Barton (alex@barton.de)
+ * Copyright (c)2001-2010 Alexander Barton (alex@barton.de)
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -401,6 +401,7 @@ Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Ori
 		case 'n': /* Only members can write */
 		case 's': /* Secret channel */
 		case 't': /* Topic locked */
+		case 'z': /* Secure connections only */
 			if (modeok)
 				x[0] = *mode_ptr;
 			else
blob - 59c6cdb91623aae327671252da3e77dd08387feb
blob + e15bf166e3ff0bf80a8a317a72490734eeb13802
--- src/ngircd/messages.h
+++ src/ngircd/messages.h
@@ -113,6 +113,7 @@
 #define ERR_ALREADYREGISTRED_MSG	"462 %s :Connection already registered"
 #define ERR_PASSWDMISMATCH_MSG		"464 %s :Invalid password"
 #define ERR_CHANNELISFULL_MSG		"471 %s %s :Cannot join channel (+l)"
+#define ERR_SECURECHANNEL_MSG		"471 %s %s :Cannot join channel (+z)"
 #define ERR_UNKNOWNMODE_MSG		"472 %s: %c :is unknown mode char for %s"
 #define ERR_INVITEONLYCHAN_MSG		"473 %s %s :Cannot join channel (+i)"
 #define ERR_BANNEDFROMCHAN_MSG		"474 %s %s :Cannot join channel (+b)"