1 files changed, 97 insertions, 0 deletions
diff --git a/src/irc/core/irc-masks.c b/src/irc/core/irc-masks.c
new file mode 100644
index 00000000..1c895998
--- /dev/null
+++ b/src/irc/core/irc-masks.c
@@ -0,0 +1,97 @@
+/*
+ masks.c : irssi
+
+    Copyright (C) 1999-2000 Timo Sirainen
+
+    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 2 of the License, 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#include "module.h"
+#include "network.h"
+
+#include "irc.h"
+#include "irc-masks.h"
+
+static char *get_domain_mask(char *host)
+{
+	char *ptr;
+
+	if (strchr(host, '.') == NULL) {
+                /* no dots - toplevel domain or IPv6 address */
+		ptr = strrchr(host, ':');
+		if (ptr != NULL) {
+			/* IPv6 address, ban the last 64k addresses */
+			if (ptr[1] != '\0') strcpy(ptr+1, "*");
+		}
+
+		return host;
+	}
+
+        if (is_ipv4_address(host)) {
+		/* it's an IP address, change last digit to * */
+		ptr = strrchr(host, '.');
+		if (ptr != NULL && isdigit(ptr[1]))
+			strcpy(ptr+1, "*");
+	} else {
+		/* if more than one dot, skip the first
+		   (dyn123.blah.net -> *.blah.net) */
+		ptr = strchr(host, '.');
+		if (ptr != NULL && strchr(ptr+1, '.') != NULL) {
+			host = ptr-1;
+                        host[0] = '*';
+		}
+	}
+
+	return host;
+}
+
+char *irc_get_mask(const char *nick, const char *address, int flags)
+{
+	char *ret, *user, *host;
+
+	/* strip -, ^ or ~ from start.. */
+	user = g_strconcat("*", ishostflag(*address) ?
+			   address+1 : address, NULL);
+
+	/* split user and host */
+	host = strchr(user, '@');
+	if (host == NULL) {
+		g_free(user);
+		return NULL;
+	}
+	*host++ = '\0';
+
+	switch (flags & (IRC_MASK_HOST|IRC_MASK_DOMAIN)) {
+	case IRC_MASK_HOST:
+                /* we already have the host */
+		break;
+	case IRC_MASK_DOMAIN:
+		/* domain - *.blah.org */
+		host = get_domain_mask(host);
+		break;
+	default:
+		/* no domain/host */
+		host = "*";
+		break;
+	}
+
+	ret = g_strdup_printf("%s!%s@%s",
+			      (flags & IRC_MASK_NICK) ? nick : "*",
+			      (flags & IRC_MASK_USER) ? user : "*",
+			      host);
+	g_free(user);
+
+	return ret;
+}