From eb68f30ca2261fba8388c9774b117c6213eaa4ba Mon Sep 17 00:00:00 2001
From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Sat, 29 Mar 2014 16:03:31 -0700
Subject: [PATCH] Add utility to convert ip to int.

---
 src/lua/lua_ip.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)

diff --git a/src/lua/lua_ip.c b/src/lua/lua_ip.c
index 014b35493..daf5a03ce 100644
--- a/src/lua/lua_ip.c
+++ b/src/lua/lua_ip.c
@@ -24,6 +24,8 @@
 #include "lua_common.h"
 
 LUA_FUNCTION_DEF (ip, to_string);
+LUA_FUNCTION_DEF (ip, to_number);
+LUA_FUNCTION_DEF (ip, from_number);
 LUA_FUNCTION_DEF (ip, to_table);
 LUA_FUNCTION_DEF (ip, str_octets);
 LUA_FUNCTION_DEF (ip, inversed_str_octets);
@@ -34,6 +36,7 @@ LUA_FUNCTION_DEF (ip, get_version);
 static const struct luaL_reg    iplib_m[] = {
 	LUA_INTERFACE_DEF (ip, to_string),
 	LUA_INTERFACE_DEF (ip, to_table),
+	LUA_INTERFACE_DEF (ip, to_number),
 	LUA_INTERFACE_DEF (ip, str_octets),
 	LUA_INTERFACE_DEF (ip, inversed_str_octets),
 	LUA_INTERFACE_DEF (ip, get_version),
@@ -44,6 +47,7 @@ static const struct luaL_reg    iplib_m[] = {
 
 static const struct luaL_reg    iplib_f[] = {
 	LUA_INTERFACE_DEF (ip, from_string),
+	LUA_INTERFACE_DEF (ip, from_number),
 	{NULL, NULL}
 };
 
@@ -212,6 +216,70 @@ lua_ip_from_string (lua_State *L)
 	return 1;
 }
 
+static gint
+lua_ip_to_number (lua_State *L)
+{
+	struct rspamd_lua_ip *ip = lua_check_ip (L, 1);
+	guint32 dst[4], i;
+
+	if (ip != NULL) {
+		if (ip->af == AF_INET) {
+			/* One integer in host byte order */
+			lua_pushinteger (L, ntohl (ip->data.ip4.s_addr));
+		}
+		else {
+			/* 4 integers in host byte order */
+			G_STATIC_ASSERT (sizeof (ip->data) >= sizeof (dst));
+			memcpy (dst, &ip->data, sizeof (dst));
+			for (i = 0; i < G_N_ELEMENTS (dst); i ++) {
+				lua_pushinteger (L, ntohl (dst[i]));
+			}
+			return 4;
+		}
+	}
+	else {
+		lua_pushnil (L);
+	}
+
+	return 1;
+}
+
+static gint
+lua_ip_from_number (lua_State *L)
+{
+	guint32 src[4], i;
+	struct rspamd_lua_ip *ip, **pip;
+
+	if (lua_gettop (L) == 1 && lua_isnumber (L, 1)) {
+		/* Ipv4 version */
+		ip = g_slice_alloc (sizeof (struct rspamd_lua_ip));
+		src[0] = lua_tointeger (L, 1);
+		ip->af = AF_INET;
+		ip->data.ip4.s_addr = htonl (src[0]);
+		pip = lua_newuserdata (L, sizeof (struct rspamd_lua_ip *));
+		lua_setclass (L, "rspamd{ip}", -1);
+		*pip = ip;
+	}
+	else if (lua_gettop (L) == 4 && lua_isnumber (L, 1)) {
+		/* Ipv6 version */
+		for (i = 0; i < 4; i ++) {
+			src[i] = htonl (lua_tonumber (L, i + 1));
+		}
+		G_STATIC_ASSERT (sizeof (ip->data) >= sizeof (src));
+		ip = g_slice_alloc (sizeof (struct rspamd_lua_ip));
+		ip->af = AF_INET6;
+		memcpy (&ip->data, src, sizeof (src));
+		pip = lua_newuserdata (L, sizeof (struct rspamd_lua_ip *));
+		lua_setclass (L, "rspamd{ip}", -1);
+		*pip = ip;
+	}
+	else {
+		lua_pushnil (L);
+	}
+
+	return 1;
+}
+
 static gint
 lua_ip_destroy (lua_State *L)
 {
-- 
2.39.5