mirror of
https://github.com/lunarmodules/luasocket.git
synced 2024-06-26 16:49:47 +02:00
195069cf5f
Moved complexity of connect and accept there. Created a new options.c module to take care of options. Auxiliar.c is now cleaner.
351 lines
12 KiB
C
351 lines
12 KiB
C
/*=========================================================================*\
|
|
* UDP object
|
|
* LuaSocket toolkit
|
|
*
|
|
* RCS ID: $Id$
|
|
\*=========================================================================*/
|
|
#include <string.h>
|
|
|
|
#include <lua.h>
|
|
#include <lauxlib.h>
|
|
|
|
#include "luasocket.h"
|
|
|
|
#include "auxiliar.h"
|
|
#include "socket.h"
|
|
#include "inet.h"
|
|
#include "options.h"
|
|
#include "udp.h"
|
|
|
|
/*=========================================================================*\
|
|
* Internal function prototypes
|
|
\*=========================================================================*/
|
|
static int global_create(lua_State *L);
|
|
static int meth_send(lua_State *L);
|
|
static int meth_sendto(lua_State *L);
|
|
static int meth_receive(lua_State *L);
|
|
static int meth_receivefrom(lua_State *L);
|
|
static int meth_getsockname(lua_State *L);
|
|
static int meth_getpeername(lua_State *L);
|
|
static int meth_setsockname(lua_State *L);
|
|
static int meth_setpeername(lua_State *L);
|
|
static int meth_close(lua_State *L);
|
|
static int meth_shutdown(lua_State *L);
|
|
static int meth_setoption(lua_State *L);
|
|
static int meth_settimeout(lua_State *L);
|
|
static int meth_fd(lua_State *L);
|
|
static int meth_dirty(lua_State *L);
|
|
|
|
/* udp object methods */
|
|
static luaL_reg udp[] = {
|
|
{"setpeername", meth_setpeername},
|
|
{"setsockname", meth_setsockname},
|
|
{"getsockname", meth_getsockname},
|
|
{"getpeername", meth_getpeername},
|
|
{"send", meth_send},
|
|
{"sendto", meth_sendto},
|
|
{"receive", meth_receive},
|
|
{"receivefrom", meth_receivefrom},
|
|
{"settimeout", meth_settimeout},
|
|
{"close", meth_close},
|
|
{"shutdown", meth_shutdown},
|
|
{"setoption", meth_setoption},
|
|
{"__gc", meth_close},
|
|
{"fd", meth_fd},
|
|
{"dirty", meth_dirty},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
/* socket options */
|
|
static t_opt opt[] = {
|
|
{"dontroute", opt_dontroute},
|
|
{"broadcast", opt_broadcast},
|
|
{"reuseaddr", opt_reuseaddr},
|
|
{"ip-multicast-ttl", opt_ip_multicast_ttl},
|
|
{"ip-multicast-loop", opt_ip_multicast_loop},
|
|
{"ip-add-membership", opt_ip_add_membership},
|
|
{"ip-drop-membership", opt_ip_drop_membersip},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
/* functions in library namespace */
|
|
static luaL_reg func[] = {
|
|
{"udp", global_create},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Initializes module
|
|
\*-------------------------------------------------------------------------*/
|
|
void udp_open(lua_State *L)
|
|
{
|
|
/* create classes */
|
|
aux_newclass(L, "udp{connected}", udp);
|
|
aux_newclass(L, "udp{unconnected}", udp);
|
|
/* create class groups */
|
|
aux_add2group(L, "udp{connected}", "udp{any}");
|
|
aux_add2group(L, "udp{unconnected}", "udp{any}");
|
|
aux_add2group(L, "udp{connected}", "select{able}");
|
|
aux_add2group(L, "udp{unconnected}", "select{able}");
|
|
/* define library functions */
|
|
luaL_openlib(L, LUASOCKET_LIBNAME, func, 0);
|
|
lua_pop(L, 1);
|
|
}
|
|
|
|
/*=========================================================================*\
|
|
* Lua methods
|
|
\*=========================================================================*/
|
|
/*-------------------------------------------------------------------------*\
|
|
* Send data through connected udp socket
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_send(lua_State *L)
|
|
{
|
|
p_udp udp = (p_udp) aux_checkclass(L, "udp{connected}", 1);
|
|
p_tm tm = &udp->tm;
|
|
size_t count, sent = 0;
|
|
int err;
|
|
const char *data = luaL_checklstring(L, 2, &count);
|
|
tm_markstart(tm);
|
|
err = sock_send(&udp->sock, data, count, &sent, tm_get(tm));
|
|
if (err == IO_DONE) lua_pushnumber(L, sent);
|
|
else lua_pushnil(L);
|
|
/* a 'closed' error on an unconnected means the target address was not
|
|
* accepted by the transport layer */
|
|
io_pusherror(L, err == IO_CLOSED ? IO_REFUSED : err);
|
|
return 2;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Send data through unconnected udp socket
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_sendto(lua_State *L)
|
|
{
|
|
p_udp udp = (p_udp) aux_checkclass(L, "udp{unconnected}", 1);
|
|
size_t count, sent = 0;
|
|
const char *data = luaL_checklstring(L, 2, &count);
|
|
const char *ip = luaL_checkstring(L, 3);
|
|
unsigned short port = (unsigned short) luaL_checknumber(L, 4);
|
|
p_tm tm = &udp->tm;
|
|
struct sockaddr_in addr;
|
|
int err;
|
|
memset(&addr, 0, sizeof(addr));
|
|
if (!inet_aton(ip, &addr.sin_addr))
|
|
luaL_argerror(L, 3, "invalid ip address");
|
|
addr.sin_family = AF_INET;
|
|
addr.sin_port = htons(port);
|
|
tm_markstart(tm);
|
|
err = sock_sendto(&udp->sock, data, count, &sent,
|
|
(SA *) &addr, sizeof(addr), tm_get(tm));
|
|
if (err == IO_DONE) lua_pushnumber(L, sent);
|
|
else lua_pushnil(L);
|
|
/* a 'closed' error on an unconnected means the target address was not
|
|
* accepted by the transport layer */
|
|
io_pusherror(L, err == IO_CLOSED ? IO_REFUSED : err);
|
|
return 2;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Receives data from a UDP socket
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_receive(lua_State *L)
|
|
{
|
|
p_udp udp = (p_udp) aux_checkgroup(L, "udp{any}", 1);
|
|
char buffer[UDP_DATAGRAMSIZE];
|
|
size_t got, count = (size_t) luaL_optnumber(L, 2, sizeof(buffer));
|
|
int err;
|
|
p_tm tm = &udp->tm;
|
|
count = MIN(count, sizeof(buffer));
|
|
tm_markstart(tm);
|
|
err = sock_recv(&udp->sock, buffer, count, &got, tm_get(tm));
|
|
if (err == IO_DONE) lua_pushlstring(L, buffer, got);
|
|
else lua_pushnil(L);
|
|
io_pusherror(L, err);
|
|
return 2;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Receives data and sender from a UDP socket
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_receivefrom(lua_State *L)
|
|
{
|
|
p_udp udp = (p_udp) aux_checkclass(L, "udp{unconnected}", 1);
|
|
struct sockaddr_in addr;
|
|
socklen_t addr_len = sizeof(addr);
|
|
char buffer[UDP_DATAGRAMSIZE];
|
|
size_t got, count = (size_t) luaL_optnumber(L, 2, sizeof(buffer));
|
|
int err;
|
|
p_tm tm = &udp->tm;
|
|
tm_markstart(tm);
|
|
count = MIN(count, sizeof(buffer));
|
|
err = sock_recvfrom(&udp->sock, buffer, count, &got,
|
|
(SA *) &addr, &addr_len, tm_get(tm));
|
|
if (err == IO_DONE) {
|
|
lua_pushlstring(L, buffer, got);
|
|
lua_pushstring(L, inet_ntoa(addr.sin_addr));
|
|
lua_pushnumber(L, ntohs(addr.sin_port));
|
|
return 3;
|
|
} else {
|
|
lua_pushnil(L);
|
|
io_pusherror(L, err);
|
|
return 2;
|
|
}
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Select support methods
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_fd(lua_State *L)
|
|
{
|
|
p_udp udp = (p_udp) aux_checkgroup(L, "udp{any}", 1);
|
|
lua_pushnumber(L, udp->sock);
|
|
return 1;
|
|
}
|
|
|
|
static int meth_dirty(lua_State *L)
|
|
{
|
|
p_udp udp = (p_udp) aux_checkgroup(L, "udp{any}", 1);
|
|
(void) udp;
|
|
lua_pushboolean(L, 0);
|
|
return 1;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Just call inet methods
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_getpeername(lua_State *L)
|
|
{
|
|
p_udp udp = (p_udp) aux_checkclass(L, "udp{connected}", 1);
|
|
return inet_meth_getpeername(L, &udp->sock);
|
|
}
|
|
|
|
static int meth_getsockname(lua_State *L)
|
|
{
|
|
p_udp udp = (p_udp) aux_checkgroup(L, "udp{any}", 1);
|
|
return inet_meth_getsockname(L, &udp->sock);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Just call option handler
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_setoption(lua_State *L)
|
|
{
|
|
p_udp udp = (p_udp) aux_checkgroup(L, "udp{any}", 1);
|
|
return opt_meth_setoption(L, opt, &udp->sock);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Just call tm methods
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_settimeout(lua_State *L)
|
|
{
|
|
p_udp udp = (p_udp) aux_checkgroup(L, "udp{any}", 1);
|
|
return tm_meth_settimeout(L, &udp->tm);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Turns a master udp object into a client object.
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_setpeername(lua_State *L)
|
|
{
|
|
p_udp udp = (p_udp) aux_checkclass(L, "udp{unconnected}", 1);
|
|
p_tm tm = &udp->tm;
|
|
const char *address = luaL_checkstring(L, 2);
|
|
int connecting = strcmp(address, "*");
|
|
unsigned short port = connecting ?
|
|
(unsigned short) luaL_checknumber(L, 3) :
|
|
(unsigned short) luaL_optnumber(L, 3, 0);
|
|
const char *err = inet_tryconnect(&udp->sock, address, port, tm);
|
|
if (err) {
|
|
lua_pushnil(L);
|
|
lua_pushstring(L, err);
|
|
return 2;
|
|
}
|
|
/* change class to connected or unconnected depending on address */
|
|
if (connecting) aux_setclass(L, "udp{connected}", 1);
|
|
else aux_setclass(L, "udp{unconnected}", 1);
|
|
lua_pushnumber(L, 1);
|
|
return 1;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Closes socket used by object
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_close(lua_State *L)
|
|
{
|
|
p_udp udp = (p_udp) aux_checkgroup(L, "udp{any}", 1);
|
|
sock_destroy(&udp->sock);
|
|
return 0;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Shuts the connection down partially
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_shutdown(lua_State *L)
|
|
{
|
|
p_udp udp = (p_udp) aux_checkgroup(L, "udp{any}", 1);
|
|
const char *how = luaL_optstring(L, 2, "both");
|
|
switch (how[0]) {
|
|
case 'b':
|
|
if (strcmp(how, "both")) goto error;
|
|
sock_shutdown(&udp->sock, 2);
|
|
break;
|
|
case 's':
|
|
if (strcmp(how, "send")) goto error;
|
|
sock_shutdown(&udp->sock, 1);
|
|
break;
|
|
case 'r':
|
|
if (strcmp(how, "receive")) goto error;
|
|
sock_shutdown(&udp->sock, 0);
|
|
break;
|
|
}
|
|
return 0;
|
|
error:
|
|
luaL_argerror(L, 2, "invalid shutdown method");
|
|
return 0;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Turns a master object into a server object
|
|
\*-------------------------------------------------------------------------*/
|
|
static int meth_setsockname(lua_State *L)
|
|
{
|
|
p_udp udp = (p_udp) aux_checkclass(L, "udp{unconnected}", 1);
|
|
const char *address = luaL_checkstring(L, 2);
|
|
unsigned short port = (unsigned short) luaL_checknumber(L, 3);
|
|
const char *err = inet_trybind(&udp->sock, address, port, -1);
|
|
if (err) {
|
|
lua_pushnil(L);
|
|
lua_pushstring(L, err);
|
|
return 2;
|
|
}
|
|
lua_pushnumber(L, 1);
|
|
return 1;
|
|
}
|
|
|
|
/*=========================================================================*\
|
|
* Library functions
|
|
\*=========================================================================*/
|
|
/*-------------------------------------------------------------------------*\
|
|
* Creates a master udp object
|
|
\*-------------------------------------------------------------------------*/
|
|
static int global_create(lua_State *L)
|
|
{
|
|
t_sock sock;
|
|
const char *err = inet_trycreate(&sock, SOCK_DGRAM);
|
|
/* try to allocate a system socket */
|
|
if (!err) {
|
|
/* allocate tcp object */
|
|
p_udp udp = (p_udp) lua_newuserdata(L, sizeof(t_udp));
|
|
udp->sock = sock;
|
|
/* set its type as master object */
|
|
aux_setclass(L, "udp{unconnected}", -1);
|
|
/* initialize remaining structure fields */
|
|
tm_init(&udp->tm, -1, -1);
|
|
return 1;
|
|
} else {
|
|
lua_pushnil(L);
|
|
lua_pushstring(L, err);
|
|
return 2;
|
|
}
|
|
}
|