text: #ifndef OPTIONS_H
  #define OPTIONS_H
  /*=========================================================================*\
  * Common option interface 
  * LuaSocket toolkit
  *
  * This module provides a common interface to socket options, used mainly by
  * modules UDP and TCP. 
  \*=========================================================================*/
  
  #include "lua.h"
  #include "socket.h"
  
  /* option registry */
  typedef struct t_opt {
    const char *name;
    int (*func)(lua_State *L, p_socket ps);
  } t_opt;
  typedef t_opt *p_opt;
  
  /* supported options for setoption */
  int opt_set_dontroute(lua_State *L, p_socket ps);
  int opt_set_broadcast(lua_State *L, p_socket ps);
  int opt_set_reuseaddr(lua_State *L, p_socket ps);
  int opt_set_tcp_nodelay(lua_State *L, p_socket ps);
  int opt_set_keepalive(lua_State *L, p_socket ps);
  int opt_set_linger(lua_State *L, p_socket ps);
  int opt_set_reuseaddr(lua_State *L, p_socket ps);
  int opt_set_reuseport(lua_State *L, p_socket ps);
  int opt_set_ip_multicast_if(lua_State *L, p_socket ps);
  int opt_set_ip_multicast_ttl(lua_State *L, p_socket ps);
  int opt_set_ip_multicast_loop(lua_State *L, p_socket ps);
  int opt_set_ip_add_membership(lua_State *L, p_socket ps);
  int opt_set_ip_drop_membersip(lua_State *L, p_socket ps);
  int opt_set_ip6_unicast_hops(lua_State *L, p_socket ps);
  int opt_set_ip6_multicast_hops(lua_State *L, p_socket ps);
  int opt_set_ip6_multicast_loop(lua_State *L, p_socket ps);
  int opt_set_ip6_add_membership(lua_State *L, p_socket ps);
  int opt_set_ip6_drop_membersip(lua_State *L, p_socket ps);
  int opt_set_ip6_v6only(lua_State *L, p_socket ps);
  
  /* supported options for getoption */
  int opt_get_reuseaddr(lua_State *L, p_socket ps);
  int opt_get_tcp_nodelay(lua_State *L, p_socket ps);
  int opt_get_keepalive(lua_State *L, p_socket ps);
  int opt_get_linger(lua_State *L, p_socket ps);
  int opt_get_reuseaddr(lua_State *L, p_socket ps);
  int opt_get_ip_multicast_loop(lua_State *L, p_socket ps);
  int opt_get_ip_multicast_if(lua_State *L, p_socket ps);
  int opt_get_error(lua_State *L, p_socket ps);
  int opt_get_ip6_multicast_loop(lua_State *L, p_socket ps);
  int opt_get_ip6_multicast_hops(lua_State *L, p_socket ps);
  int opt_get_ip6_unicast_hops(lua_State *L, p_socket ps);
  int opt_get_ip6_v6only(lua_State *L, p_socket ps);
  int opt_get_reuseport(lua_State *L, p_socket ps);
  
  /* invokes the appropriate option handler */
  int opt_meth_setoption(lua_State *L, p_opt opt, p_socket ps);
  int opt_meth_getoption(lua_State *L, p_opt opt, p_socket ps);
  
  #endif
  