--- /dev/null
+/*
+ * Solanum: a slightly advanced ircd
+ * chm_regmsg: require identification to chat (+R mode).
+ *
+ * Copyright (c) 2020 Eric Mertens <emertens@gmail.com>
+ *
+ * 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 "logger.h"
+#include "send.h"
+#include "s_conf.h"
+#include "s_user.h"
+#include "s_serv.h"
+#include "numeric.h"
+#include "chmode.h"
+#include "inline/stringops.h"
+
+static const char chm_regmsg_desc[] =
+ "Adds channel mode +R, which blocks messagess from unregistered users";
+
+static unsigned int mode_regmsg;
+
+static void chm_regmsg_process(void *);
+
+mapi_hfn_list_av1 chm_regmsg_hfnlist[] = {
+ { "privmsg_channel", (hookfn) chm_regmsg_process },
+ { NULL, NULL }
+};
+
+static void
+chm_regmsg_process(void *data_)
+{
+ hook_data_privmsg_channel *data = data_;
+ struct membership *msptr;
+
+ /* message is already blocked, defer */
+ if (data->approved)
+ return;
+
+ /* user is identified, accept */
+ if (!EmptyString(data->source_p->user->suser))
+ return;
+
+ /* voice and op override identification requirement, accept */
+ msptr = find_channel_membership(data->chptr, data->source_p);
+ if (is_chanop_voiced(msptr))
+ return;
+
+ sendto_one_numeric(data->source_p, ERR_MSGNEEDREGGEDNICK, form_str(ERR_MSGNEEDREGGEDNICK),
+ data->source_p->name, data->chptr->chname);
+ data->approved = ERR_MSGNEEDREGGEDNICK;
+}
+
+static int
+_modinit(void)
+{
+ mode_regmsg = cflag_add('R', chm_simple);
+ if (mode_regmsg == 0) {
+ ierror("chm_regmsg: unable to allocate cmode slot for +R, unloading module");
+ return -1;
+ }
+
+ return 0;
+}
+
+static void
+_moddeinit(void)
+{
+ cflag_orphan('R');
+}
+
+DECLARE_MODULE_AV2(chm_regmsg, _modinit, _moddeinit, NULL, NULL, chm_regmsg_hfnlist, NULL, NULL, chm_regmsg_desc);