Add extban target for matching against a user's modes.

Syntax: $m:+o (require usermode +o)
Syntax: $m:+o-a (require usermode +o but do not allow +a)
Syntax: $m:+a (require usermode +a)
Syntax: $m:-h (require user disables cloaking to enter)

extensions/Makefile.in

@@ -42,6 +42,7 @@ SRCS =                          \
   extb_server.c			\
   extb_ssl.c			\
   extb_realname.c		\
+  extb_usermode.c		\
   extb_extgecos.c		\
   force_user_invis.c		\
   hurt.c			\

extensions/extb_usermode.c

@@ -0,0 +1,77 @@
+/*
+ * Usermode extban type: bans all users with a specific usermode
+ * -- nenolod
+ */
+
+#include "stdinc.h"
+#include "modules.h"
+#include "hook.h"
+#include "client.h"
+#include "ircd.h"
+#include "send.h"
+#include "hash.h"
+#include "s_conf.h"
+#include "s_user.h"
+#include "s_serv.h"
+#include "numeric.h"
+
+static int _modinit(void);
+static void _moddeinit(void);
+static int eb_usermode(const char *data, struct Client *client_p, struct Channel *chptr, long mode_type);
+
+DECLARE_MODULE_AV1(extb_account, _modinit, _moddeinit, NULL, NULL, NULL, "$Revision: 1299 $");
+
+static int
+_modinit(void)
+{
+	extban_table['m'] = eb_usermode;
+
+	return 0;
+}
+
+static void
+_moddeinit(void)
+{
+	extban_table['m'] = NULL;
+}
+
+static int eb_usermode(const char *data, struct Client *client_p,
+		struct Channel *chptr, long mode_type)
+{
+	int dir = MODE_ADD;
+	unsigned int modes_ack = 0, modes_nak = 0;
+	const char *p;
+
+	(void)chptr;
+
+	/* $m must have a specified mode */
+	if (data == NULL)
+		return EXTBAN_NOMATCH;
+
+	for (p = data; *p != '\0'; p++)
+	{
+		switch (*p)
+		{
+		case '+':
+			dir = MODE_ADD;
+			break;
+		case '-':
+			dir = MODE_DEL;
+			break;
+		default:
+			switch (dir)
+			{
+			case MODE_DEL:
+				modes_nak |= user_modes[(unsigned char) *p];
+				break;
+			case MODE_ADD:
+			default:
+				modes_ack |= user_modes[(unsigned char) *p];
+				break;
+			}
+			break;
+		}
+	}
+
+	return ((client_p->umodes & modes_ack) && !(client_p->umodes & modes_nak)) ? EXTBAN_MATCH : EXTBAN_NOMATCH;
+}