From 1aaf54ac24e8e24d5a3ce5b7b00a775f5237d7a9 Mon Sep 17 00:00:00 2001
From: DNS777 <dns@rbose.org>
Date: Thu, 23 Aug 2012 09:25:30 +0000
Subject: [PATCH] Implement channel mode "M"

Only the server, identified users and IRC operators are able to talk.
---
 src/ngircd/channel.c  | 23 +++++++++++++++++++++++
 src/ngircd/defines.h  |  2 +-
 src/ngircd/irc-mode.c |  1 +
 src/ngircd/messages.h |  2 +-
 4 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/src/ngircd/channel.c b/src/ngircd/channel.c
index ff470246..1d1645f2 100644
--- a/src/ngircd/channel.c
+++ b/src/ngircd/channel.c
@@ -845,6 +845,22 @@ Can_Send_To_Channel(CHANNEL *Chan, CLIENT *From)
 }
 
 
+static bool
+Can_Send_To_Channel_Identified(CHANNEL *Chan, CLIENT *From)
+{
+	if ((Client_ThisServer() == From) || Client_HasMode(From, 'o'))
+		return true;
+
+	if (strchr(Channel_Modes(Chan), 'M') && !Client_HasMode(From, 'R'))
+		return false;
+
+	if (Lists_Check(&Chan->list_excepts, From))
+		return true;
+
+	return !Lists_Check(&Chan->list_bans, From);
+}
+
+
 GLOBAL bool
 Channel_Write(CHANNEL *Chan, CLIENT *From, CLIENT *Client, const char *Command,
 	      bool SendErrors, const char *Text)
@@ -856,6 +872,13 @@ Channel_Write(CHANNEL *Chan, CLIENT *From, CLIENT *Client, const char *Command,
 					  Client_ID(From), Channel_Name(Chan));
 	}
 
+	if (!Can_Send_To_Channel_Identified(Chan, From)) {
+		if (! SendErrors)
+			return CONNECTED;
+		return IRC_WriteStrClient(From, ERR_CANNOTSENDTOCHAN_MSG,
+					  Client_ID(From), Channel_Name(Chan));
+	}
+
 	if (Client_Conn(From) > NONE)
 		Conn_UpdateIdle(Client_Conn(From));
 
diff --git a/src/ngircd/defines.h b/src/ngircd/defines.h
index cd0a1666..310e0699 100644
--- a/src/ngircd/defines.h
+++ b/src/ngircd/defines.h
@@ -164,7 +164,7 @@
 #define USERMODES "acCiorRswx"
 
 /** Supported channel modes. */
-#define CHANMODES "beiIklmnoOPrRstvz"
+#define CHANMODES "beiIklmMnoOPrRstvz"
 
 /** Away message for users connected to linked servers. */
 #define DEFAULT_AWAY_MSG "Away"
diff --git a/src/ngircd/irc-mode.c b/src/ngircd/irc-mode.c
index fa35cdd0..f91a28c6 100644
--- a/src/ngircd/irc-mode.c
+++ b/src/ngircd/irc-mode.c
@@ -500,6 +500,7 @@ Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel)
 		switch (*mode_ptr) {
 		/* --- Channel modes --- */
 		case 'i': /* Invite only */
+		case 'M': /* Only identified nicks can write */
 		case 'm': /* Moderated */
 		case 'n': /* Only members can write */
 		case 'R': /* Registered users only */
diff --git a/src/ngircd/messages.h b/src/ngircd/messages.h
index 9ad6be17..0c36f60a 100644
--- a/src/ngircd/messages.h
+++ b/src/ngircd/messages.h
@@ -21,7 +21,7 @@
 #define RPL_YOURHOST_MSG		"002 %s :Your host is %s, running version ngircd-%s (%s/%s/%s)"
 #define RPL_CREATED_MSG			"003 %s :This server has been started %s"
 #define RPL_MYINFO_MSG			"004 %s %s ngircd-%s %s %s"
-#define RPL_ISUPPORT1_MSG		"005 %s RFC2812 IRCD=ngIRCd CASEMAPPING=ascii PREFIX=(ov)@+ CHANTYPES=#&+ CHANMODES=beI,k,l,imnOPRstz CHANLIMIT=#&+:%d :are supported on this server"
+#define RPL_ISUPPORT1_MSG		"005 %s RFC2812 IRCD=ngIRCd CASEMAPPING=ascii PREFIX=(ov)@+ CHANTYPES=#&+ CHANMODES=beI,k,l,imMnOPRstz CHANLIMIT=#&+:%d :are supported on this server"
 #define RPL_ISUPPORT2_MSG		"005 %s CHANNELLEN=%d NICKLEN=%d TOPICLEN=%d AWAYLEN=%d KICKLEN=%d MODES=%d MAXLIST=beI:%d EXCEPTS=e INVEX=I PENALTY :are supported on this server"
 
 #define RPL_TRACELINK_MSG		"200 %s Link %s-%s %s %s V%s %ld %d %d"