2 * nixio - Linux I/O library for lua
4 * Copyright (C) 2009 Steven Barth <steven@midlink.org>
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
19 #include "nixio-tls.h"
23 static int nixio__tls_sock_perror(lua_State *L, SSL *sock, int code) {
25 lua_pushinteger(L, SSL_get_error(sock, code));
29 static int nixio__tls_sock_pstatus(lua_State *L, SSL *sock, int code) {
31 lua_pushboolean(L, 1);
34 return nixio__tls_sock_perror(L, sock, code);
38 static SSL* nixio__checktlssock(lua_State *L) {
39 if (lua_istable(L, 1)) {
40 lua_getfield(L, 1, "connection");
43 nixio_tls_sock *sock = luaL_checkudata(L, 1, NIXIO_TLS_SOCK_META);
44 luaL_argcheck(L, sock->socket, 1, "invalid context");
48 static int nixio_tls_sock_recv(lua_State *L) {
49 SSL *sock = nixio__checktlssock(L);
50 int req = luaL_checkinteger(L, 2);
52 luaL_argcheck(L, req >= 0, 2, "out of range");
54 /* We limit the readsize to NIXIO_BUFFERSIZE */
55 req = (req > NIXIO_BUFFERSIZE) ? NIXIO_BUFFERSIZE : req;
59 char buffer[NIXIO_BUFFERSIZE];
60 int readc = SSL_read(sock, buffer, req);
63 return nixio__tls_sock_pstatus(L, sock, readc);
65 lua_pushlstring(L, buffer, readc);
72 lua_pushliteral(L, "");
76 nixio_tls_sock *t = lua_touserdata(L, 1);
78 /* AXTLS doesn't handle buffering for us, so we have to hack around*/
79 if (req < t->pbufsiz) {
80 lua_pushlstring(L, t->pbufpos, req);
88 /* while handshake pending */
89 while ((axread = ssl_read(sock, (uint8_t**)&axbuf)) == SSL_OK);
92 lua_pushlstring(L, t->pbufpos, t->pbufsiz);
96 /* There is an error */
98 t->pbuffer = t->pbufpos = NULL;
101 if (axread != SSL_ERROR_CONN_LOST) {
102 return nixio__tls_sock_perror(L, sock, axread);
105 lua_pushliteral(L, "");
109 int stillwant = req - t->pbufsiz;
110 if (stillwant < axread) {
111 /* we got more data than we need */
112 lua_pushlstring(L, axbuf, stillwant);
117 /* remaining data goes into the buffer */
118 t->pbufpos = t->pbuffer;
119 t->pbufsiz = axread - stillwant;
120 t->pbuffer = realloc(t->pbuffer, t->pbufsiz);
125 return luaL_error(L, "out of memory");
128 t->pbufpos = t->pbuffer;
129 memcpy(t->pbufpos, axbuf + stillwant, t->pbufsiz);
131 lua_pushlstring(L, axbuf, axread);
138 t->pbuffer = t->pbufpos = NULL;
145 #endif /* WITH_AXTLS */
149 static int nixio_tls_sock_send(lua_State *L) {
150 SSL *sock = nixio__checktlssock(L);
153 const char *data = luaL_checklstring(L, 2, &len);
154 sent = SSL_write(sock, data, len);
156 lua_pushinteger(L, sent);
159 return nixio__tls_sock_pstatus(L, sock, len);
163 static int nixio_tls_sock_accept(lua_State *L) {
164 SSL *sock = nixio__checktlssock(L);
165 return nixio__tls_sock_pstatus(L, sock, SSL_accept(sock));
168 static int nixio_tls_sock_connect(lua_State *L) {
169 SSL *sock = nixio__checktlssock(L);
170 return nixio__tls_sock_pstatus(L, sock, SSL_connect(sock));
173 static int nixio_tls_sock_shutdown(lua_State *L) {
174 SSL *sock = nixio__checktlssock(L);
175 return nixio__tls_sock_pstatus(L, sock, SSL_shutdown(sock));
178 static int nixio_tls_sock__gc(lua_State *L) {
179 nixio_tls_sock *sock = luaL_checkudata(L, 1, NIXIO_TLS_SOCK_META);
181 SSL_free(sock->socket);
190 static int nixio_tls_sock__tostring(lua_State *L) {
191 SSL *sock = nixio__checktlssock(L);
192 lua_pushfstring(L, "nixio TLS connection: %p", sock);
197 /* ctx function table */
198 static const luaL_reg M[] = {
199 {"recv", nixio_tls_sock_recv},
200 {"send", nixio_tls_sock_send},
201 {"accept", nixio_tls_sock_accept},
202 {"connect", nixio_tls_sock_connect},
203 {"shutdown", nixio_tls_sock_shutdown},
204 {"__gc", nixio_tls_sock__gc},
205 {"__tostring", nixio_tls_sock__tostring},
210 void nixio_open_tls_socket(lua_State *L) {
211 /* create socket metatable */
212 luaL_newmetatable(L, NIXIO_TLS_SOCK_META);
213 luaL_register(L, NULL, M);
214 lua_pushvalue(L, -1);
215 lua_setfield(L, -2, "__index");
216 lua_setfield(L, -2, "tls_socket_meta");