SNI support.

Makefile

@@ -1,19 +1,19 @@
 # Inform the location to intall the modules
-LUAPATH		?= /usr/share/lua/5.1
-LUACPATH	?= /usr/lib/lua/5.1
+LUAPATH  ?= /usr/share/lua/5.1
+LUACPATH ?= /usr/lib/lua/5.1
 
 # Compile with build-in LuaSocket's help files.
 # Comment this lines if you will link with non-internal LuaSocket's help files
 #  and edit INCDIR and LIBDIR properly.
-EXTRA		 = luasocket
-DEFS		 = -DWITH_LUASOCKET
+EXTRA = luasocket
+DEFS  = -DWITH_LUASOCKET
 
 # Edit the lines below to inform new path, if necessary.
 # Path below points to internal LuaSocket's help files.
-INC_PATH	?= -I/usr/include
-LIB_PATH	?= -L/usr/lib
-INCDIR		 = -I. $(INC_PATH)
-LIBDIR		 = -L./luasocket $(LIB_PATH)
+INC_PATH ?= -I/usr/include
+LIB_PATH ?= -L/usr/lib
+INCDIR    = -I. $(INC_PATH)
+LIBDIR    = -L./luasocket $(LIB_PATH)
 
 # For Mac OS X: set the system version
 MACOSX_VERSION=10.4

src/Makefile

@@ -20,22 +20,21 @@ MAC_ENV=env MACOSX_DEPLOYMENT_TARGET='$(MACVER)'
 MAC_CFLAGS=-O2 -fno-common $(WARN) $(INCDIR) $(DEFS)
 MAC_LDFLAGS=-bundle -undefined dynamic_lookup $(LIBDIR)
 
-INSTALL	?= install
-CC	?= cc
-LD	?= $(MYENV) cc
-CFLAGS	+= $(MYCFLAGS)
-LDFLAGS	+= $(MYLDFLAGS)
-DESTDIR	?= /
+INSTALL  = install
+CC       = cc
+LD       = $(MYENV) cc
+CFLAGS  += $(MYCFLAGS)
+LDFLAGS += $(MYLDFLAGS)
 
 .PHONY: all clean install none linux bsd macosx luasocket
 
 all:
 
 install: $(CMOD) $(LMOD)
-	$(INSTALL) -d $(DESTDIR)$(LUAPATH)/ssl $(DESTDIR)$(LUACPATH)
-	$(INSTALL) -D $(CMOD) $(DESTDIR)$(LUACPATH)
-	$(INSTALL) -m644 -D $(LMOD) $(DESTDIR)$(LUAPATH)
-	$(INSTALL) -m644 -D https.lua $(DESTDIR)$(LUAPATH)/ssl
+	$(INSTALL) -d $(LUAPATH)/ssl $(LUACPATH)
+	$(INSTALL) $(CMOD) $(LUACPATH)
+	$(INSTALL) -m644 $(LMOD) $(LUAPATH)
+	$(INSTALL) -m644 https.lua $(LUAPATH)/ssl
 
 linux:
 	@$(MAKE) $(CMOD) MYCFLAGS="$(LNX_CFLAGS)" MYLDFLAGS="$(LNX_LDFLAGS)" EXTRA="$(EXTRA)"

src/ssl.c

@@ -28,6 +28,7 @@
 #include <luasocket/socket.h>
 
 #include "x509.h"
+#include "context.h"
 #include "ssl.h"
 
 /**
@@ -80,11 +81,15 @@ static int meth_destroy(lua_State *L)
   }
   ssl->state = LSEC_STATE_CLOSED;
   if (ssl->ssl) {
-    /* Clear the registry */
+    /* Clear the registries */
     luaL_getmetatable(L, "SSL:Verify:Registry");
     lua_pushlightuserdata(L, (void*)ssl->ssl);
     lua_pushnil(L);
     lua_settable(L, -3);
+    luaL_getmetatable(L, "SSL:SNI:Registry");
+    lua_pushlightuserdata(L, (void*)ssl->ssl);
+    lua_pushnil(L);
+    lua_settable(L, -3);
     /* Destroy the object */
     SSL_free(ssl->ssl);
     ssl->ssl = NULL;
@@ -653,6 +658,67 @@ static int meth_info(lua_State *L)
   return 4;
 }
 
+static int sni_cb(SSL *ssl, int *ad, void *arg)
+{
+  SSL_CTX *newctx = NULL;
+  SSL_CTX *ctx = SSL_get_SSL_CTX(ssl);
+  lua_State *L = ((p_context)SSL_CTX_get_app_data(ctx))->L;
+  const char *name = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name);
+  /* No name, use default context */
+  if (!name)
+    return SSL_TLSEXT_ERR_NOACK;
+  /* Search for the name in the map */
+  luaL_getmetatable(L, "SSL:SNI:Registry");
+  lua_pushlightuserdata(L, (void*)ssl);
+  lua_gettable(L, -2);
+  lua_pushstring(L, name);
+  lua_gettable(L, -2);
+  if (lua_isuserdata(L, -1))
+    newctx = lsec_checkcontext(L, -1);
+  lua_pop(L, 3);
+  if (newctx) {
+    SSL_set_SSL_CTX(ssl, newctx);
+    return SSL_TLSEXT_ERR_OK;
+  }
+  return SSL_TLSEXT_ERR_ALERT_FATAL;
+}
+
+static int meth_sni(lua_State *L)
+{
+  SSL_CTX *aux;
+  const char *name;
+  p_ssl ssl = (p_ssl)luaL_checkudata(L, 1, "SSL:Connection");
+  SSL_CTX *ctx = SSL_get_SSL_CTX(ssl->ssl);
+  p_context pctx = (p_context)SSL_CTX_get_app_data(ctx);
+  switch (pctx->mode) {
+  case LSEC_MODE_CLIENT:
+    name = luaL_checkstring(L, 2);
+    SSL_set_tlsext_host_name(ssl->ssl, name);
+    break;
+  case LSEC_MODE_SERVER:
+    luaL_checktype(L, 2, LUA_TTABLE);
+    /* Check if the table contains only (string -> context) */
+    lua_pushnil(L);
+    while (lua_next(L, 2)) {
+      luaL_checkstring(L, 3);
+      aux = lsec_checkcontext(L, 4);
+      /* Set callback in every context */
+      SSL_CTX_set_tlsext_servername_callback(aux, sni_cb);
+      /* leave the next key on the stack */
+      lua_pop(L, 1);
+    }
+    /* Save table in the register */
+    luaL_getmetatable(L, "SSL:SNI:Registry");
+    lua_pushlightuserdata(L, (void*)ssl->ssl);
+    lua_pushvalue(L, 2);
+    lua_settable(L, -3);
+    /* Set callback in the default context */
+    SSL_CTX_set_tlsext_servername_callback(ctx, sni_cb);
+    break;
+  }
+  return 0;
+}
+
 static int meth_copyright(lua_State *L)
 {
   lua_pushstring(L, "LuaSec 0.5 - Copyright (C) 2006-2011 Bruno Silvestre"
@@ -683,6 +749,7 @@ static luaL_Reg methods[] = {
   {"receive",             meth_receive},
   {"send",                meth_send},
   {"settimeout",          meth_settimeout},
+  {"sni",                 meth_sni},
   {"want",                meth_want},
   {NULL,                  NULL}
 };
@@ -727,7 +794,9 @@ LSEC_API int luaopen_ssl_core(lua_State *L)
   /* Initialize internal library */
   socket_open();
 #endif
-   
+
+  luaL_newmetatable(L, "SSL:SNI:Registry");
+
   /* Register the functions and tables */
   luaL_newmetatable(L, "SSL:Connection");
   luaL_register(L, NULL, meta);
@@ -758,6 +827,8 @@ LSEC_API int luaopen_ssl_core(lua_State *L)
   socket_open();
 #endif
 
+  luaL_newmetatable(L, "SSL:SNI:Registry");
+
   /* Register the functions and tables */
   luaL_newmetatable(L, "SSL:Connection");
   luaL_setfuncs(L, meta, 0);

src/ssl.lua

@@ -10,7 +10,7 @@ local x509    = require("ssl.x509")
 
 module("ssl", package.seeall)
 
-_VERSION   = "0.5.PR"
+_VERSION   = "0.5"
 _COPYRIGHT = core.copyright()
 
 -- Export