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;
100 if (axread != SSL_ERROR_CONN_LOST) {
102 return nixio__tls_sock_perror(L, sock, axread);
105 lua_pushliteral(L, "");
111 int stillwant = req - t->pbufsiz;
112 if (stillwant < axread) {
113 /* we got more data than we need */
114 lua_pushlstring(L, axbuf, stillwant);
119 /* remaining data goes into the buffer */
120 t->pbufpos = t->pbuffer;
121 t->pbufsiz = axread - stillwant;
122 t->pbuffer = realloc(t->pbuffer, t->pbufsiz);
127 return luaL_error(L, "out of memory");
130 t->pbufpos = t->pbuffer;
131 memcpy(t->pbufpos, axbuf + stillwant, t->pbufsiz);
133 lua_pushlstring(L, axbuf, axread);
140 t->pbuffer = t->pbufpos = NULL;
147 #endif /* WITH_AXTLS */
151 static int nixio_tls_sock_send(lua_State *L) {
152 SSL *sock = nixio__checktlssock(L);
155 const char *data = luaL_checklstring(L, 2, &len);
156 sent = SSL_write(sock, data, len);
158 lua_pushinteger(L, sent);
161 return nixio__tls_sock_pstatus(L, sock, len);
165 static int nixio_tls_sock_accept(lua_State *L) {
166 SSL *sock = nixio__checktlssock(L);
167 return nixio__tls_sock_pstatus(L, sock, SSL_accept(sock));
170 static int nixio_tls_sock_connect(lua_State *L) {
171 SSL *sock = nixio__checktlssock(L);
172 return nixio__tls_sock_pstatus(L, sock, SSL_connect(sock));
175 static int nixio_tls_sock_shutdown(lua_State *L) {
176 SSL *sock = nixio__checktlssock(L);
177 return nixio__tls_sock_pstatus(L, sock, SSL_shutdown(sock));
180 static int nixio_tls_sock__gc(lua_State *L) {
181 nixio_tls_sock *sock = luaL_checkudata(L, 1, NIXIO_TLS_SOCK_META);
183 SSL_free(sock->socket);
192 static int nixio_tls_sock__tostring(lua_State *L) {
193 SSL *sock = nixio__checktlssock(L);
194 lua_pushfstring(L, "nixio TLS connection: %p", sock);
199 /* ctx function table */
200 static const luaL_reg M[] = {
201 {"recv", nixio_tls_sock_recv},
202 {"send", nixio_tls_sock_send},
203 {"read", nixio_tls_sock_recv},
204 {"write", nixio_tls_sock_send},
205 {"accept", nixio_tls_sock_accept},
206 {"connect", nixio_tls_sock_connect},
207 {"shutdown", nixio_tls_sock_shutdown},
208 {"__gc", nixio_tls_sock__gc},
209 {"__tostring", nixio_tls_sock__tostring},
214 void nixio_open_tls_socket(lua_State *L) {
215 /* create socket metatable */
216 luaL_newmetatable(L, NIXIO_TLS_SOCK_META);
217 luaL_register(L, NULL, M);
218 lua_pushvalue(L, -1);
219 lua_setfield(L, -2, "__index");
220 lua_setfield(L, -2, "meta_tls_socket");