extensions: add umode_noctcp extension

extensions/Makefile.am

@@ -43,6 +43,7 @@ extension_LTLIBRARIES =		\
   sno_globalnickchange.la	\
   sno_globaloper.la		\
   sno_whois.la			\
+  umode_noctcp.la		\
   m_adminwall.la			\
   m_echotags.la			\
   m_extendchans.la		\

extensions/umode_noctcp.c

@@ -0,0 +1,72 @@
+/*
+ * umode_noctcp.c: user mode +C which blocks CTCPs to the user
+ *
+ * Copyright (c) 2016 M. Teufel
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice is present in all copies.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "stdinc.h"
+#include "modules.h"
+#include "hook.h"
+#include "client.h"
+#include "ircd.h"
+#include "send.h"
+#include "s_user.h"
+#include "numeric.h"
+#include "inline/stringops.h"
+
+static const char umode_noctcp_desc[] =
+	"Adds user mode +C which blocks CTCPs to the user.";
+
+static void umode_noctcp_process(hook_data_privmsg_user *);
+
+mapi_hfn_list_av1 umode_noctcp_hfnlist[] = {
+	{ "privmsg_user", (hookfn) umode_noctcp_process },
+	{ NULL, NULL }
+};
+
+static void
+umode_noctcp_process(hook_data_privmsg_user *data) {
+	if (data->approved || data->msgtype == MESSAGE_TYPE_NOTICE) {
+		return;
+	}
+
+	if (data->target_p->umodes & user_modes['C'] && *data->text == '\001' && strncasecmp(data->text + 1, "ACTION", 6)) {
+		sendto_one_numeric(data->source_p, ERR_CANNOTSENDTOUSER, form_str(ERR_CANNOTSENDTOUSER), data->target_p->name, "+C set");
+		data->approved = ERR_CANNOTSENDTOUSER;
+		return;
+	}
+}
+
+static int
+_modinit(void)
+{
+	user_modes['C'] = find_umode_slot();
+	construct_umodebuf();
+
+	return 0;
+}
+
+static void
+_moddeinit(void)
+{
+	user_modes['C'] = 0;
+	construct_umodebuf();
+}
+
+DECLARE_MODULE_AV2(umode_noctcp, _modinit, _moddeinit, NULL, NULL, umode_noctcp_hfnlist, NULL, NULL, umode_noctcp_desc);

help/opers/umode

@@ -16,6 +16,7 @@ User modes: (* 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 unidentified users that you have not accepted from

help/users/umode

@@ -11,6 +11,7 @@ User modes: (? designates that the umode is provided by an extension
        ? +h     - Has a cloaked host. May be +x depending on cloaking module
          +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 unidentified users that you have not accepted from

include/messages.h

@@ -192,6 +192,7 @@
 #define NUMERIC_STR_486      "%s :You must log in with services to message this user"
 #define NUMERIC_STR_489      ":%s 489 %s %s :You're neither voiced nor channel operator"
 #define NUMERIC_STR_491      ":No appropriate operator blocks were found for your host"
+#define NUMERIC_STR_492      ":Cannot send to user %s (%s)"
 #define NUMERIC_STR_494      "%s :cannot answer you while you are %s, your message was not sent"
 #define NUMERIC_STR_501      ":%s 501 %s :Unknown MODE flag"
 #define NUMERIC_STR_502      ":%s 502 %s :Can't change mode for other users"

include/numeric.h

@@ -293,6 +293,8 @@
 
 #define ERR_NOOPERHOST       491
 
+#define ERR_CANNOTSENDTOUSER 492
+
 #define ERR_OWNMODE          494 /* from bahamut -- jilles */
 
 #define ERR_UMODEUNKNOWNFLAG 501