mirror of
https://github.com/lunarmodules/luasocket.git
synced 2024-11-14 09:18:21 +01:00
357 lines
12 KiB
C
357 lines
12 KiB
C
/*=========================================================================*\
|
|
* Unix domain socket
|
|
* LuaSocket toolkit
|
|
*
|
|
* RCS ID: $Id$
|
|
\*=========================================================================*/
|
|
#include <string.h>
|
|
|
|
#include "lua.h"
|
|
#include "lauxlib.h"
|
|
|
|
#include "auxiliar.h"
|
|
#include "socket.h"
|
|
#include "options.h"
|
|
#include "unix.h"
|
|
#include <sys/un.h>
|
|
|
|
/*=========================================================================*\
|
|
* Internal function prototypes
|
|
\*=========================================================================*/
|
|
static int global_create(lua_State *L);
|
|
static int meth_connect(lua_State *L);
|
|
static int meth_listen(lua_State *L);
|
|
static int meth_bind(lua_State *L);
|
|
static int meth_send(lua_State *L);
|
|
static int meth_shutdown(lua_State *L);
|
|
static int meth_receive(lua_State *L);
|
|
static int meth_accept(lua_State *L);
|
|
static int meth_close(lua_State *L);
|
|
static int meth_setoption(lua_State *L);
|
|
static int meth_settimeout(lua_State *L);
|
|
static int meth_getfd(lua_State *L);
|
|
static int meth_setfd(lua_State *L);
|
|
static int meth_dirty(lua_State *L);
|
|
static int meth_getstats(lua_State *L);
|
|
static int meth_setstats(lua_State *L);
|
|
|
|
static const char *unix_tryconnect(p_unix un, const char *path);
|
|
static const char *unix_trybind(p_unix un, const char *path);
|
|
|
|
/* unix object methods */
|
|
static luaL_reg un[] = {
|
|
{"__gc", meth_close},
|
|
{"__tostring", auxiliar_tostring},
|
|
{"accept", meth_accept},
|
|
{"bind", meth_bind},
|
|
{"close", meth_close},
|
|
{"connect", meth_connect},
|
|
{"dirty", meth_dirty},
|
|
{"getfd", meth_getfd},
|
|
{"getstats", meth_getstats},
|
|
{"setstats", meth_setstats},
|
|
{"listen", meth_listen},
|
|
{"receive", meth_receive},
|
|
{"send", meth_send},
|
|
{"setfd", meth_setfd},
|
|
{"setoption", meth_setoption},
|
|
{"setpeername", meth_connect},
|
|
{"setsockname", meth_bind},
|
|
{"settimeout", meth_settimeout},
|
|
{"shutdown", meth_shutdown},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
/* socket option handlers */
|
|
static t_opt opt[] = {
|
|
{"keepalive", opt_keepalive},
|
|
{"reuseaddr", opt_reuseaddr},
|
|
{"linger", opt_linger},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
/* our socket creation function */
|
|
static luaL_reg func[] = {
|
|
{"unix", global_create},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Initializes module
|
|
\*-------------------------------------------------------------------------*/
|
|
int luaopen_socket_unix(lua_State *L) {
|
|
/* create classes */
|
|
auxiliar_newclass(L, "unix{master}", un);
|
|
auxiliar_newclass(L, "unix{client}", un);
|
|
auxiliar_newclass(L, "unix{server}", un);
|
|
/* create class groups */
|
|
auxiliar_add2group(L, "unix{master}", "unix{any}");
|
|
auxiliar_add2group(L, "unix{client}", "unix{any}");
|
|
auxiliar_add2group(L, "unix{server}", "unix{any}");
|
|
/* make sure the function ends up in the package table */
|
|
luaL_openlib(L, "socket", func, 0);
|
|
/* return the function instead of the 'socket' table */
|
|
lua_pushstring(L, "unix");
|
|
lua_gettable(L, -2);
|
|
return 1;
|
|
}
|
|
|
|
/*=========================================================================*\
|
|
* Lua methods
|
|
\*=========================================================================*/
|
|
/*-------------------------------------------------------------------------*\
|
|
* Just call buffered IO methods
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_send(lua_State *L) {
|
|
p_unix un = (p_unix) auxiliar_checkclass(L, "unix{client}", 1);
|
|
return buffer_meth_send(L, &un->buf);
|
|
}
|
|
|
|
static int meth_receive(lua_State *L) {
|
|
p_unix un = (p_unix) auxiliar_checkclass(L, "unix{client}", 1);
|
|
return buffer_meth_receive(L, &un->buf);
|
|
}
|
|
|
|
static int meth_getstats(lua_State *L) {
|
|
p_unix un = (p_unix) auxiliar_checkclass(L, "unix{client}", 1);
|
|
return buffer_meth_getstats(L, &un->buf);
|
|
}
|
|
|
|
static int meth_setstats(lua_State *L) {
|
|
p_unix un = (p_unix) auxiliar_checkclass(L, "unix{client}", 1);
|
|
return buffer_meth_setstats(L, &un->buf);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Just call option handler
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_setoption(lua_State *L) {
|
|
p_unix un = (p_unix) auxiliar_checkgroup(L, "unix{any}", 1);
|
|
return opt_meth_setoption(L, opt, &un->sock);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Select support methods
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_getfd(lua_State *L) {
|
|
p_unix un = (p_unix) auxiliar_checkgroup(L, "unix{any}", 1);
|
|
lua_pushnumber(L, (int) un->sock);
|
|
return 1;
|
|
}
|
|
|
|
/* this is very dangerous, but can be handy for those that are brave enough */
|
|
static int meth_setfd(lua_State *L) {
|
|
p_unix un = (p_unix) auxiliar_checkgroup(L, "unix{any}", 1);
|
|
un->sock = (t_socket) luaL_checknumber(L, 2);
|
|
return 0;
|
|
}
|
|
|
|
static int meth_dirty(lua_State *L) {
|
|
p_unix un = (p_unix) auxiliar_checkgroup(L, "unix{any}", 1);
|
|
lua_pushboolean(L, !buffer_isempty(&un->buf));
|
|
return 1;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Waits for and returns a client object attempting connection to the
|
|
* server object
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_accept(lua_State *L) {
|
|
p_unix server = (p_unix) auxiliar_checkclass(L, "unix{server}", 1);
|
|
p_timeout tm = timeout_markstart(&server->tm);
|
|
t_socket sock;
|
|
int err = socket_accept(&server->sock, &sock, NULL, NULL, tm);
|
|
/* if successful, push client socket */
|
|
if (err == IO_DONE) {
|
|
p_unix clnt = (p_unix) lua_newuserdata(L, sizeof(t_unix));
|
|
auxiliar_setclass(L, "unix{client}", -1);
|
|
/* initialize structure fields */
|
|
socket_setnonblocking(&sock);
|
|
clnt->sock = sock;
|
|
io_init(&clnt->io, (p_send)socket_send, (p_recv)socket_recv,
|
|
(p_error) socket_ioerror, &clnt->sock);
|
|
timeout_init(&clnt->tm, -1, -1);
|
|
buffer_init(&clnt->buf, &clnt->io, &clnt->tm);
|
|
return 1;
|
|
} else {
|
|
lua_pushnil(L);
|
|
lua_pushstring(L, socket_strerror(err));
|
|
return 2;
|
|
}
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Binds an object to an address
|
|
\*-------------------------------------------------------------------------*/
|
|
static const char *unix_trybind(p_unix un, const char *path) {
|
|
struct sockaddr_un local;
|
|
size_t len = strlen(path);
|
|
int err;
|
|
if (len >= sizeof(local.sun_path)) return "path too long";
|
|
memset(&local, 0, sizeof(local));
|
|
strcpy(local.sun_path, path);
|
|
local.sun_family = AF_UNIX;
|
|
#ifdef UNIX_HAS_SUN_LEN
|
|
local.sun_len = sizeof(local.sun_family) + sizeof(local.sun_len)
|
|
+ len + 1;
|
|
err = socket_bind(&un->sock, (SA *) &local, local.sun_len);
|
|
|
|
#else
|
|
err = socket_bind(&un->sock, (SA *) &local,
|
|
sizeof(local.sun_family) + len);
|
|
#endif
|
|
if (err != IO_DONE) socket_destroy(&un->sock);
|
|
return socket_strerror(err);
|
|
}
|
|
|
|
static int meth_bind(lua_State *L) {
|
|
p_unix un = (p_unix) auxiliar_checkclass(L, "unix{master}", 1);
|
|
const char *path = luaL_checkstring(L, 2);
|
|
const char *err = unix_trybind(un, path);
|
|
if (err) {
|
|
lua_pushnil(L);
|
|
lua_pushstring(L, err);
|
|
return 2;
|
|
}
|
|
lua_pushnumber(L, 1);
|
|
return 1;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Turns a master unix object into a client object.
|
|
\*-------------------------------------------------------------------------*/
|
|
static const char *unix_tryconnect(p_unix un, const char *path)
|
|
{
|
|
struct sockaddr_un remote;
|
|
int err;
|
|
size_t len = strlen(path);
|
|
if (len >= sizeof(remote.sun_path)) return "path too long";
|
|
memset(&remote, 0, sizeof(remote));
|
|
strcpy(remote.sun_path, path);
|
|
remote.sun_family = AF_UNIX;
|
|
timeout_markstart(&un->tm);
|
|
#ifdef UNIX_HAS_SUN_LEN
|
|
remote.sun_len = sizeof(remote.sun_family) + sizeof(remote.sun_len)
|
|
+ len + 1;
|
|
err = socket_connect(&un->sock, (SA *) &remote, remote.sun_len, &un->tm);
|
|
#else
|
|
err = socket_connect(&un->sock, (SA *) &remote,
|
|
sizeof(remote.sun_family) + len, &un->tm);
|
|
#endif
|
|
if (err != IO_DONE) socket_destroy(&un->sock);
|
|
return socket_strerror(err);
|
|
}
|
|
|
|
static int meth_connect(lua_State *L)
|
|
{
|
|
p_unix un = (p_unix) auxiliar_checkclass(L, "unix{master}", 1);
|
|
const char *path = luaL_checkstring(L, 2);
|
|
const char *err = unix_tryconnect(un, path);
|
|
if (err) {
|
|
lua_pushnil(L);
|
|
lua_pushstring(L, err);
|
|
return 2;
|
|
}
|
|
/* turn master object into a client object */
|
|
auxiliar_setclass(L, "unix{client}", 1);
|
|
lua_pushnumber(L, 1);
|
|
return 1;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Closes socket used by object
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_close(lua_State *L)
|
|
{
|
|
p_unix un = (p_unix) auxiliar_checkgroup(L, "unix{any}", 1);
|
|
socket_destroy(&un->sock);
|
|
lua_pushnumber(L, 1);
|
|
return 1;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Puts the sockt in listen mode
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_listen(lua_State *L)
|
|
{
|
|
p_unix un = (p_unix) auxiliar_checkclass(L, "unix{master}", 1);
|
|
int backlog = (int) luaL_optnumber(L, 2, 32);
|
|
int err = socket_listen(&un->sock, backlog);
|
|
if (err != IO_DONE) {
|
|
lua_pushnil(L);
|
|
lua_pushstring(L, socket_strerror(err));
|
|
return 2;
|
|
}
|
|
/* turn master object into a server object */
|
|
auxiliar_setclass(L, "unix{server}", 1);
|
|
lua_pushnumber(L, 1);
|
|
return 1;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Shuts the connection down partially
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_shutdown(lua_State *L)
|
|
{
|
|
p_unix un = (p_unix) auxiliar_checkclass(L, "unix{client}", 1);
|
|
const char *how = luaL_optstring(L, 2, "both");
|
|
switch (how[0]) {
|
|
case 'b':
|
|
if (strcmp(how, "both")) goto error;
|
|
socket_shutdown(&un->sock, 2);
|
|
break;
|
|
case 's':
|
|
if (strcmp(how, "send")) goto error;
|
|
socket_shutdown(&un->sock, 1);
|
|
break;
|
|
case 'r':
|
|
if (strcmp(how, "receive")) goto error;
|
|
socket_shutdown(&un->sock, 0);
|
|
break;
|
|
}
|
|
lua_pushnumber(L, 1);
|
|
return 1;
|
|
error:
|
|
luaL_argerror(L, 2, "invalid shutdown method");
|
|
return 0;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Just call tm methods
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_settimeout(lua_State *L) {
|
|
p_unix un = (p_unix) auxiliar_checkgroup(L, "unix{any}", 1);
|
|
return timeout_meth_settimeout(L, &un->tm);
|
|
}
|
|
|
|
/*=========================================================================*\
|
|
* Library functions
|
|
\*=========================================================================*/
|
|
/*-------------------------------------------------------------------------*\
|
|
* Creates a master unix object
|
|
\*-------------------------------------------------------------------------*/
|
|
static int global_create(lua_State *L) {
|
|
t_socket sock;
|
|
int err = socket_create(&sock, AF_UNIX, SOCK_STREAM, 0);
|
|
/* try to allocate a system socket */
|
|
if (err == IO_DONE) {
|
|
/* allocate unix object */
|
|
p_unix un = (p_unix) lua_newuserdata(L, sizeof(t_unix));
|
|
/* set its type as master object */
|
|
auxiliar_setclass(L, "unix{master}", -1);
|
|
/* initialize remaining structure fields */
|
|
socket_setnonblocking(&sock);
|
|
un->sock = sock;
|
|
io_init(&un->io, (p_send) socket_send, (p_recv) socket_recv,
|
|
(p_error) socket_ioerror, &un->sock);
|
|
timeout_init(&un->tm, -1, -1);
|
|
buffer_init(&un->buf, &un->io, &un->tm);
|
|
return 1;
|
|
} else {
|
|
lua_pushnil(L);
|
|
lua_pushstring(L, socket_strerror(err));
|
|
return 2;
|
|
}
|
|
}
|