mirror of
https://github.com/lunarmodules/luasocket.git
synced 2024-07-01 10:59:46 +02:00
357 lines
12 KiB
C
357 lines
12 KiB
C
/*=========================================================================*\
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* TCP object
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* LuaSocket toolkit
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*
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* RCS ID: $Id$
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\*=========================================================================*/
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#include <string.h>
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#include <lua.h>
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#include <lauxlib.h>
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#include "auxiliar.h"
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#include "socket.h"
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#include "inet.h"
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#include "options.h"
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#include "tcp.h"
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/*=========================================================================*\
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* Internal function prototypes
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\*=========================================================================*/
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static int global_create(lua_State *L);
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static int meth_connect(lua_State *L);
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static int meth_connected(lua_State *L);
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static int meth_listen(lua_State *L);
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static int meth_bind(lua_State *L);
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static int meth_send(lua_State *L);
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static int meth_getstats(lua_State *L);
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static int meth_setstats(lua_State *L);
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static int meth_getsockname(lua_State *L);
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static int meth_getpeername(lua_State *L);
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static int meth_shutdown(lua_State *L);
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static int meth_receive(lua_State *L);
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static int meth_accept(lua_State *L);
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static int meth_close(lua_State *L);
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static int meth_setoption(lua_State *L);
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static int meth_settimeout(lua_State *L);
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static int meth_getfd(lua_State *L);
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static int meth_setfd(lua_State *L);
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static int meth_dirty(lua_State *L);
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/* tcp object methods */
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static luaL_reg tcp[] = {
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{"__gc", meth_close},
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{"__tostring", aux_tostring},
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{"accept", meth_accept},
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{"bind", meth_bind},
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{"close", meth_close},
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{"connect", meth_connect},
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{"connected", meth_connected},
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{"dirty", meth_dirty},
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{"getfd", meth_getfd},
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{"getpeername", meth_getpeername},
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{"getsockname", meth_getsockname},
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{"getstats", meth_getstats},
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{"setstats", meth_setstats},
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{"listen", meth_listen},
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{"receive", meth_receive},
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{"send", meth_send},
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{"setfd", meth_setfd},
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{"setoption", meth_setoption},
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{"setpeername", meth_connect},
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{"setsockname", meth_bind},
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{"settimeout", meth_settimeout},
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{"shutdown", meth_shutdown},
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{NULL, NULL}
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};
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/* socket option handlers */
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static t_opt opt[] = {
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{"keepalive", opt_keepalive},
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{"reuseaddr", opt_reuseaddr},
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{"tcp-nodelay", opt_tcp_nodelay},
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{"linger", opt_linger},
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{NULL, NULL}
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};
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/* functions in library namespace */
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static luaL_reg func[] = {
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{"tcp", global_create},
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{NULL, NULL}
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};
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/*-------------------------------------------------------------------------*\
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* Initializes module
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\*-------------------------------------------------------------------------*/
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int tcp_open(lua_State *L)
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{
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/* create classes */
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aux_newclass(L, "tcp{master}", tcp);
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aux_newclass(L, "tcp{client}", tcp);
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aux_newclass(L, "tcp{server}", tcp);
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/* create class groups */
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aux_add2group(L, "tcp{master}", "tcp{any}");
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aux_add2group(L, "tcp{client}", "tcp{any}");
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aux_add2group(L, "tcp{server}", "tcp{any}");
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/* define library functions */
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luaL_openlib(L, NULL, func, 0);
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return 0;
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}
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/*=========================================================================*\
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* Lua methods
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\*=========================================================================*/
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/*-------------------------------------------------------------------------*\
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* Just call buffered IO methods
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\*-------------------------------------------------------------------------*/
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static int meth_send(lua_State *L) {
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p_tcp tcp = (p_tcp) aux_checkclass(L, "tcp{client}", 1);
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return buf_meth_send(L, &tcp->buf);
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}
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static int meth_receive(lua_State *L) {
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p_tcp tcp = (p_tcp) aux_checkclass(L, "tcp{client}", 1);
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return buf_meth_receive(L, &tcp->buf);
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}
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static int meth_getstats(lua_State *L) {
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p_tcp tcp = (p_tcp) aux_checkclass(L, "tcp{client}", 1);
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return buf_meth_getstats(L, &tcp->buf);
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}
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static int meth_setstats(lua_State *L) {
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p_tcp tcp = (p_tcp) aux_checkclass(L, "tcp{client}", 1);
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return buf_meth_setstats(L, &tcp->buf);
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}
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/*-------------------------------------------------------------------------*\
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* Just call option handler
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\*-------------------------------------------------------------------------*/
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static int meth_setoption(lua_State *L)
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{
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p_tcp tcp = (p_tcp) aux_checkgroup(L, "tcp{any}", 1);
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return opt_meth_setoption(L, opt, &tcp->sock);
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}
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/*-------------------------------------------------------------------------*\
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* Select support methods
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\*-------------------------------------------------------------------------*/
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static int meth_getfd(lua_State *L)
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{
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p_tcp tcp = (p_tcp) aux_checkgroup(L, "tcp{any}", 1);
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lua_pushnumber(L, (int) tcp->sock);
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return 1;
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}
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/* this is very dangerous, but can be handy for those that are brave enough */
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static int meth_setfd(lua_State *L)
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{
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p_tcp tcp = (p_tcp) aux_checkgroup(L, "tcp{any}", 1);
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tcp->sock = (t_sock) luaL_checknumber(L, 2);
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return 0;
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}
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static int meth_dirty(lua_State *L)
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{
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p_tcp tcp = (p_tcp) aux_checkgroup(L, "tcp{any}", 1);
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lua_pushboolean(L, !buf_isempty(&tcp->buf));
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return 1;
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}
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/*-------------------------------------------------------------------------*\
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* Waits for and returns a client object attempting connection to the
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* server object
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\*-------------------------------------------------------------------------*/
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static int meth_accept(lua_State *L)
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{
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p_tcp server = (p_tcp) aux_checkclass(L, "tcp{server}", 1);
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p_tm tm = tm_markstart(&server->tm);
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t_sock sock;
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int err = sock_accept(&server->sock, &sock, NULL, NULL, tm);
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/* if successful, push client socket */
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if (err == IO_DONE) {
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p_tcp clnt = (p_tcp) lua_newuserdata(L, sizeof(t_tcp));
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aux_setclass(L, "tcp{client}", -1);
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/* initialize structure fields */
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sock_setnonblocking(&sock);
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clnt->sock = sock;
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io_init(&clnt->io, (p_send) sock_send, (p_recv) sock_recv,
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(p_error) sock_ioerror, &clnt->sock);
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tm_init(&clnt->tm, -1, -1);
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buf_init(&clnt->buf, &clnt->io, &clnt->tm);
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return 1;
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} else {
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lua_pushnil(L);
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lua_pushstring(L, sock_strerror(err));
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return 2;
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}
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}
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/*-------------------------------------------------------------------------*\
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* Binds an object to an address
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\*-------------------------------------------------------------------------*/
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static int meth_bind(lua_State *L)
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{
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p_tcp tcp = (p_tcp) aux_checkclass(L, "tcp{master}", 1);
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const char *address = luaL_checkstring(L, 2);
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unsigned short port = (unsigned short) luaL_checknumber(L, 3);
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const char *err = inet_trybind(&tcp->sock, address, port);
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if (err) {
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lua_pushnil(L);
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lua_pushstring(L, err);
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return 2;
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}
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lua_pushnumber(L, 1);
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return 1;
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}
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/*-------------------------------------------------------------------------*\
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* Turns a master tcp object into a client object.
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\*-------------------------------------------------------------------------*/
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static int meth_connect(lua_State *L)
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{
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p_tcp tcp = (p_tcp) aux_checkclass(L, "tcp{master}", 1);
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const char *address = luaL_checkstring(L, 2);
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unsigned short port = (unsigned short) luaL_checknumber(L, 3);
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p_tm tm = tm_markstart(&tcp->tm);
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const char *err = inet_tryconnect(&tcp->sock, address, port, tm);
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if (err) {
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lua_pushnil(L);
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lua_pushstring(L, err);
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return 2;
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}
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/* turn master object into a client object */
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aux_setclass(L, "tcp{client}", 1);
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lua_pushnumber(L, 1);
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return 1;
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}
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static int meth_connected(lua_State *L)
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{
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static t_tm tm = {-1, -1};
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p_tcp tcp = (p_tcp) aux_checkclass(L, "tcp{master}", 1);
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int err = sock_connected(&tcp->sock, &tm);
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if (err != IO_DONE) {
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lua_pushnil(L);
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lua_pushstring(L, sock_strerror(err));
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return 2;
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}
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/* turn master object into a client object */
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aux_setclass(L, "tcp{client}", 1);
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lua_pushnumber(L, 1);
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return 1;
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}
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/*-------------------------------------------------------------------------*\
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* Closes socket used by object
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\*-------------------------------------------------------------------------*/
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static int meth_close(lua_State *L)
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{
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p_tcp tcp = (p_tcp) aux_checkgroup(L, "tcp{any}", 1);
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sock_destroy(&tcp->sock);
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lua_pushnumber(L, 1);
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return 1;
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}
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/*-------------------------------------------------------------------------*\
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* Puts the sockt in listen mode
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\*-------------------------------------------------------------------------*/
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static int meth_listen(lua_State *L)
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{
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p_tcp tcp = (p_tcp) aux_checkclass(L, "tcp{master}", 1);
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int backlog = (int) luaL_optnumber(L, 2, 32);
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int err = sock_listen(&tcp->sock, backlog);
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if (err != IO_DONE) {
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lua_pushnil(L);
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lua_pushstring(L, sock_strerror(err));
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return 2;
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}
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/* turn master object into a server object */
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aux_setclass(L, "tcp{server}", 1);
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lua_pushnumber(L, 1);
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return 1;
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}
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/*-------------------------------------------------------------------------*\
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* Shuts the connection down partially
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\*-------------------------------------------------------------------------*/
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static int meth_shutdown(lua_State *L)
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{
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p_tcp tcp = (p_tcp) aux_checkclass(L, "tcp{client}", 1);
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const char *how = luaL_optstring(L, 2, "both");
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switch (how[0]) {
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case 'b':
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if (strcmp(how, "both")) goto error;
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sock_shutdown(&tcp->sock, 2);
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break;
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case 's':
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if (strcmp(how, "send")) goto error;
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sock_shutdown(&tcp->sock, 1);
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break;
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case 'r':
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if (strcmp(how, "receive")) goto error;
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sock_shutdown(&tcp->sock, 0);
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break;
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}
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lua_pushnumber(L, 1);
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return 1;
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error:
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luaL_argerror(L, 2, "invalid shutdown method");
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return 0;
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}
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/*-------------------------------------------------------------------------*\
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* Just call inet methods
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\*-------------------------------------------------------------------------*/
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static int meth_getpeername(lua_State *L)
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{
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p_tcp tcp = (p_tcp) aux_checkclass(L, "tcp{client}", 1);
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return inet_meth_getpeername(L, &tcp->sock);
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}
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static int meth_getsockname(lua_State *L)
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{
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p_tcp tcp = (p_tcp) aux_checkgroup(L, "tcp{any}", 1);
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return inet_meth_getsockname(L, &tcp->sock);
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}
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/*-------------------------------------------------------------------------*\
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* Just call tm methods
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\*-------------------------------------------------------------------------*/
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static int meth_settimeout(lua_State *L)
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{
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p_tcp tcp = (p_tcp) aux_checkgroup(L, "tcp{any}", 1);
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return tm_meth_settimeout(L, &tcp->tm);
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}
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/*=========================================================================*\
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* Library functions
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\*=========================================================================*/
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/*-------------------------------------------------------------------------*\
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* Creates a master tcp object
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\*-------------------------------------------------------------------------*/
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static int global_create(lua_State *L)
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{
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t_sock sock;
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const char *err = inet_trycreate(&sock, SOCK_STREAM);
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/* try to allocate a system socket */
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if (!err) {
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/* allocate tcp object */
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p_tcp tcp = (p_tcp) lua_newuserdata(L, sizeof(t_tcp));
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/* set its type as master object */
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aux_setclass(L, "tcp{master}", -1);
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/* initialize remaining structure fields */
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sock_setnonblocking(&sock);
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tcp->sock = sock;
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io_init(&tcp->io, (p_send) sock_send, (p_recv) sock_recv,
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(p_error) sock_ioerror, &tcp->sock);
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tm_init(&tcp->tm, -1, -1);
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buf_init(&tcp->buf, &tcp->io, &tcp->tm);
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return 1;
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} else {
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lua_pushnil(L);
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lua_pushstring(L, err);
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return 2;
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}
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}
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