Add CAP echo-message.

doc/conf/modules.default.conf

@@ -200,12 +200,13 @@ loadmodule "extbans/partmsg"; /* +b ~p (hide part/quit message) */
 loadmodule "message-tags"; /* add tags to messages, required for various IRCv3 features */
 loadmodule "batch"; /* also required for several IRCv3 features */
 loadmodule "account-tag"; /* adds services account information to messages */
-loadmodule "labeled-response"; /* help clients with correlating requests to responses */
 loadmodule "link-security"; /* link-security announce */
 loadmodule "message-ids"; /* adds unique msgid to various messages */
 loadmodule "plaintext-policy"; /* plaintext-policy announce */
 loadmodule "server-time"; /* adds server timestamp to various messages */
 loadmodule "sts"; /* strict transport policy (set::tls::sts-policy) */
+loadmodule "echo-message"; /* shows clients if their messages are altered/filtered */
+loadmodule "labeled-response"; /* help clients with correlating requests to responses (EXPERIMENTAL) */
 
 
 /*** Other ***/

include/modules.h

@@ -957,7 +957,7 @@ int hooktype_stats(aClient *sptr, char *str);
 int hooktype_local_join(aClient *cptr, aClient *sptr, aChannel *chptr, char *parv[]);
 int hooktype_configtest(ConfigFile *cfptr, ConfigEntry *ce, int section, int *errors);
 int hooktype_configrun(ConfigFile *cfptr, ConfigEntry *ce, int section);
-int hooktype_usermsg(aClient *sptr, aClient *to, char *text, int notice);
+int hooktype_usermsg(aClient *sptr, aClient *to, MessageTag *mtags, char *text, int notice);
 int hooktype_chanmsg(aClient *sptr, aChannel *chptr, MessageTag *mtags, char *text, int notice);
 int hooktype_local_part(aClient *cptr, aClient *sptr, aChannel *chptr, char *comment);
 int hooktype_local_kick(aClient *cptr, aClient *sptr, aClient *victim, aChannel *chptr, char *comment);

src/modules/Makefile.in

@@ -68,7 +68,8 @@ R_MODULES= \
 	rmtkl.so \
 	message-tags.so batch.so \
 	account-tag.so labeled-response.so link-security.so \
-	message-ids.so plaintext-policy.so server-time.so sts.so
+	message-ids.so plaintext-policy.so server-time.so sts.so \
+	echo-message.so
 
 MODULES=cloak.so $(R_MODULES)
 MODULEFLAGS=@MODULEFLAGS@
@@ -599,6 +600,10 @@ sts.so: sts.c $(INCLUDES)
 	$(CC) $(CFLAGS) $(MODULEFLAGS) -DDYNAMIC_LINKING \
 		-o sts.so sts.c
 
+echo-message.so: echo-message.c $(INCLUDES)
+	$(CC) $(CFLAGS) $(MODULEFLAGS) -DDYNAMIC_LINKING \
+		-o echo-message.so echo-message.c
+
 #############################################################################
 # capabilities
 #############################################################################

src/modules/echo-message.c

@@ -0,0 +1,93 @@
+/*
+ *   IRC - Internet Relay Chat, src/modules/echo-message.c
+ *   (C) 2019 Syzop & The UnrealIRCd Team
+ *
+ *   See file AUTHORS in IRC package for additional names of
+ *   the programmers.
+ *
+ *   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
+ *   the Free Software Foundation; either version 1, or (at your option)
+ *   any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "unrealircd.h"
+
+ModuleHeader MOD_HEADER(echo_message)
+  = {
+	"echo-message",
+	"5.0",
+	"Batch CAP", 
+	"3.2-b8-1",
+	NULL 
+	};
+
+/* Variables */
+long CAP_ECHO_MESSAGE = 0L;
+
+/* Forward declarations */
+int em_chanmsg(aClient *sptr, aChannel *chptr, MessageTag *mtags, char *text, int notice);
+int em_usermsg(aClient *sptr, aClient *to, MessageTag *mtags, char *text, int notice);
+
+MOD_INIT(echo_message)
+{
+	ClientCapabilityInfo cap;
+	ClientCapability *c;
+	MessageTagHandlerInfo mtag;
+
+	MARK_AS_OFFICIAL_MODULE(modinfo);
+
+	memset(&cap, 0, sizeof(cap));
+	cap.name = "echo-message";
+	c = ClientCapabilityAdd(modinfo->handle, &cap, &CAP_ECHO_MESSAGE);
+
+	HookAdd(modinfo->handle, HOOKTYPE_CHANMSG, 0, em_chanmsg);
+	HookAdd(modinfo->handle, HOOKTYPE_USERMSG, 0, em_usermsg);
+
+	return MOD_SUCCESS;
+}
+
+MOD_LOAD(echo_message)
+{
+	return MOD_SUCCESS;
+}
+
+MOD_UNLOAD(echo_message)
+{
+	return MOD_SUCCESS;
+}
+
+int em_chanmsg(aClient *sptr, aChannel *chptr, MessageTag *mtags, char *text, int notice)
+{
+	if (MyClient(sptr))
+	{
+		sendto_prefix_one(sptr, sptr, mtags, ":%s %s %s :%s",
+			sptr->name,
+			notice ? "NOTICE" : "PRIVMSG",
+			chptr->chname, /* FIXME: should use target buffer that may include @ and such */
+			text);
+	}
+	return 0;
+}
+
+int em_usermsg(aClient *sptr, aClient *to, MessageTag *mtags, char *text, int notice)
+{
+	if (MyClient(sptr))
+	{
+		sendto_prefix_one(sptr, sptr, mtags, ":%s %s %s :%s",
+			sptr->name,
+			notice ? "NOTICE" : "PRIVMSG",
+			to->name,
+			text);
+	}
+	return 0;
+}

src/modules/message.c

@@ -1,5 +1,5 @@
 /*
- *   Unreal Internet Relay Chat Daemon, src/modules/m_message.c
+ *   Unreal Internet Relay Chat Daemon, src/modules/message.c
  *   (C) 2000-2001 Carsten V. Munk and the UnrealIRCd Team
  *   Moved to modules by Fish (Justin Hammond)
  *
@@ -142,8 +142,6 @@ int ret;
 		if (!*text)
 			return CANPRIVMSG_CONTINUE;
 
-		RunHook4(HOOKTYPE_USERMSG, sptr, acptr, *text, notice);
-
 		return CANPRIVMSG_SEND;
 	} else {
 		/* Silenced */
@@ -430,6 +428,7 @@ int m_message(aClient *cptr, aClient *sptr, MessageTag *recv_mtags, int parc, ch
 				                  newcmd,
 				                  (MyClient(acptr) ? acptr->name : nick),
 				                  text);
+				RunHook5(HOOKTYPE_USERMSG, sptr, acptr, mtags, text, notice);
 				free_mtags(mtags);
 				continue;
 			} else