Add umode +C, which blocks CTCPs to anyone with it set.

help/opers/umode

@@ -13,6 +13,7 @@ Usermodes: (* designates that the umode is oper only)
        * +l     - Can see oper locops (local wallops).
        * +s     - Can see server notices (see /quote help snomask).
        * +z     - Can see operwalls.
+         +C     - Prevents you from receiving CTCPs other than ACTION.
          +D     - Deaf - ignores all channel messages.
          +Q     - Prevents you from being affected by channel forwarding.
          +R     - Prevents non accept unidentified users from messaging you.

help/users/umode

@@ -9,6 +9,7 @@ Usermodes:
          +i     - Designates this client 'invisible'.
          +g     - "caller id" mode only allow accept clients to message you
          +w     - Can see oper wallops.
+         +C     - Prevents you from receiving CTCPs other than ACTION.
          +D     - Deaf - ignores all channel messages.
          +Q     - Prevents you from being affected by channel forwarding.
          +R     - Prevents non accept unidentified users from messaging you.

include/client.h

@@ -421,6 +421,7 @@ struct ListClient
 #define UMODE_DEAF	   0x0080
 #define UMODE_NOFORWARD    0x0100	/* don't forward */
 #define UMODE_REGONLYMSG   0x0200	/* only allow logged in users to msg */
+#define UMODE_NOCTCP	0x0400		/* block CTCPs except for ACTION */
 
 /* user information flags, only settable by remote mode or local oper */
 #define UMODE_OPER         0x1000	/* Operator */
@@ -514,6 +515,7 @@ struct ListClient
 #define IsDeaf(x)		((x)->umodes & UMODE_DEAF)
 #define IsNoForward(x)		((x)->umodes & UMODE_NOFORWARD)
 #define IsSetRegOnlyMsg(x)	((x)->umodes & UMODE_REGONLYMSG)
+#define IsSetNoCTCP(x)		((x)->umodes & UMODE_NOCTCP)
 
 #define SetGotId(x)             ((x)->flags |= FLAGS_GOTID)
 #define IsGotId(x)              (((x)->flags & FLAGS_GOTID) != 0)

include/numeric.h

@@ -296,6 +296,8 @@ extern const char *form_str(int);
 
 #define ERR_NOOPERHOST       491
 
+#define ERR_NOCTCP			492
+
 #define ERR_UMODEUNKNOWNFLAG 501
 #define ERR_USERSDONTMATCH   502
 

modules/core/m_message.c

@@ -728,8 +728,14 @@ msg_client(int p_or_n, const char *command,
 
 	if(MyClient(target_p))
 	{
+		if (IsSetNoCTCP(target_p) && p_or_n != NOTICE && *text == '\001' && strncasecmp(text + 1, "ACTION", 6))
+		{   
+			    sendto_one_numeric(source_p, ERR_NOCTCP,
+			            form_str(ERR_NOCTCP),
+			            target_p->name);
+		}
 		/* XXX Controversial? allow opers always to send through a +g */
-		if(!IsServer(source_p) && (IsSetCallerId(target_p) ||
+		else if(!IsServer(source_p) && (IsSetCallerId(target_p) ||
 					(IsSetRegOnlyMsg(target_p) && !source_p->user->suser[0])))
 		{
 			/* Here is the anti-flood bot/spambot code -db */

src/messages.tab

@@ -513,7 +513,7 @@ static  const char *  replies[] = {
 /* 489 ERR_VOICENEEDED */	":%s 489 %s %s :You're neither voiced nor channel operator",
 /* 490 */       NULL,
 /* 491 ERR_NOOPERHOST, */       ":No appropriate operator blocks were found for your host",
-/* 492 */       NULL,
+/* 492 ERR_NOCTCP */			 ":Can't send CTCP to %s (+C set)",
 /* 493 */       NULL,
 /* 494 */       NULL,
 /* 495 */       NULL,

src/newconf.c

@@ -303,6 +303,7 @@ static struct mode_table umode_table[] = {
 	{"servnotice",	UMODE_SERVNOTICE},
 	{"wallop",	UMODE_WALLOP	},
 	{"operwall",	UMODE_OPERWALL	},
+	{"noctcp",		UMODE_NOCTCP	},
 	{NULL, 0}
 };
 

src/s_user.c

@@ -69,7 +69,7 @@ int user_modes[256] = {
 	0,			/* @ */
 	0,			/* A */
 	0,			/* B */
-	0,			/* C */
+	UMODE_NOCTCP,	/* C */
 	UMODE_DEAF,		/* D */
 	0,			/* E */
 	0,			/* F */