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-rw-r--r--util-src/net.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/util-src/net.c b/util-src/net.c
index bb159d57..5f706d81 100644
--- a/util-src/net.c
+++ b/util-src/net.c
@@ -9,7 +9,10 @@
--
*/
+#ifndef _GNU_SOURCE
#define _GNU_SOURCE
+#endif
+
#include <stddef.h>
#include <string.h>
#include <errno.h>
@@ -125,12 +128,75 @@ static int lc_local_addresses(lua_State *L) {
return 1;
}
+static int lc_pton(lua_State *L) {
+ char buf[16];
+ const char *ipaddr = luaL_checkstring(L, 1);
+ int errno_ = 0;
+ int family = strchr(ipaddr, ':') ? AF_INET6 : AF_INET;
+
+ switch(inet_pton(family, ipaddr, &buf)) {
+ case 1:
+ lua_pushlstring(L, buf, family == AF_INET6 ? 16 : 4);
+ return 1;
+
+ case -1:
+ errno_ = errno;
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(errno_));
+ lua_pushinteger(L, errno_);
+ return 3;
+
+ default:
+ case 0:
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(EINVAL));
+ lua_pushinteger(L, EINVAL);
+ return 3;
+ }
+
+}
+
+static int lc_ntop(lua_State *L) {
+ char buf[INET6_ADDRSTRLEN];
+ int family;
+ int errno_;
+ size_t l;
+ const char *ipaddr = luaL_checklstring(L, 1, &l);
+
+ if(l == 16) {
+ family = AF_INET6;
+ }
+ else if(l == 4) {
+ family = AF_INET;
+ }
+ else {
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(EAFNOSUPPORT));
+ lua_pushinteger(L, EAFNOSUPPORT);
+ return 3;
+ }
+
+ if(!inet_ntop(family, ipaddr, buf, INET6_ADDRSTRLEN))
+ {
+ errno_ = errno;
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(errno_));
+ lua_pushinteger(L, errno_);
+ return 3;
+ }
+
+ lua_pushstring(L, (const char *)(&buf));
+ return 1;
+}
+
int luaopen_util_net(lua_State *L) {
#if (LUA_VERSION_NUM > 501)
luaL_checkversion(L);
#endif
luaL_Reg exports[] = {
{ "local_addresses", lc_local_addresses },
+ { "pton", lc_pton },
+ { "ntop", lc_ntop },
{ NULL, NULL }
};