commit 8d9cfa157a7fd067dab3483614d427f35dfa4ad1
from: Alexander Barton <alex@barton.de>
date: Fri Oct 19 17:45:44 2012 UTC

Allow remote servers and IRC Ops to change channel topics

Remote servers are always allowed to change all channel topics,
and IRC Operators are allowed to change all channel topics if the
configuration option "OperCanUseMode" is enabled.

Bug introduced by commit 7b01bb8 and reported by DNS777.

commit - 58abd0777b0924e5cb8fa6c01b56305d9b175608
commit + 8d9cfa157a7fd067dab3483614d427f35dfa4ad1
blob - 4a157d67e5fca76d8461f421644da3d00e7b7dd0
blob + f9d2dc125d3708b11ad629ed9551b7f08f4b2598
--- src/ngircd/irc-channel.c
+++ src/ngircd/irc-channel.c
@@ -512,7 +512,7 @@ IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 	CHANNEL *chan;
 	CLIENT *from;
 	char *topic;
-	bool r, is_oper;
+	bool r, topic_power;
 
 	assert( Client != NULL );
 	assert( Req != NULL );
@@ -535,11 +535,17 @@ IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 		return IRC_WriteStrClient(from, ERR_NOSUCHCHANNEL_MSG,
 					  Client_ID(from), Req->argv[0]);
 
-	/* Only IRC opers and channel members allowed */
-	is_oper = Client_OperByMe(from);
-	if (!Channel_IsMemberOf(chan, from) && !is_oper)
-		return IRC_WriteStrClient(from, ERR_NOTONCHANNEL_MSG,
-					  Client_ID(from), Req->argv[0]);
+	/* Only remote servers and channel members are allowed to change the
+	 * channel topic, and IRC opreators when the Conf_OperCanMode option
+	 * is set in the server configuration. */
+	if (Client_Type(Client) != CLIENT_SERVER) {
+		topic_power = Client_HasMode(from, 'o');
+		if (!Channel_IsMemberOf(chan, from)
+		    && !(Conf_OperCanMode && topic_power))
+			return IRC_WriteStrClient(from, ERR_NOTONCHANNEL_MSG,
+						  Client_ID(from), Req->argv[0]);
+	} else
+		topic_power = true;
 
 	if (Req->argc == 1) {
 		/* Request actual topic */
@@ -567,11 +573,11 @@ IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 
 	if (strchr(Channel_Modes(chan), 't')) {
 		/* Topic Lock. Is the user a channel op or IRC operator? */
-		if(!strchr(Channel_UserModes(chan, from), 'h') &&
+		if(!topic_power &&
+		   !strchr(Channel_UserModes(chan, from), 'h') &&
 		   !strchr(Channel_UserModes(chan, from), 'o') &&
 		   !strchr(Channel_UserModes(chan, from), 'a') &&
-		   !strchr(Channel_UserModes(chan, from), 'q') &&
-		   !is_oper)
+		   !strchr(Channel_UserModes(chan, from), 'q'))
 			return IRC_WriteStrClient(from, ERR_CHANOPRIVSNEEDED_MSG,
 						  Client_ID(from),
 						  Channel_Name(chan));