368 lines
11 KiB
C++
368 lines
11 KiB
C++
/*=========================================================================*\
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* Common option interface
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* LuaSocket toolkit
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\*=========================================================================*/
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#include <string.h>
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#include "lauxlib.h"
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#include "auxiliar.h"
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#include "options.h"
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#include "inet.h"
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namespace NS_SLUA {
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/*=========================================================================*\
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* Internal functions prototypes
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\*=========================================================================*/
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static int opt_setmembership(lua_State *L, p_socket ps, int level, int name);
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static int opt_ip6_setmembership(lua_State *L, p_socket ps, int level, int name);
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static int opt_setboolean(lua_State *L, p_socket ps, int level, int name);
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static int opt_getboolean(lua_State *L, p_socket ps, int level, int name);
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static int opt_setint(lua_State *L, p_socket ps, int level, int name);
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static int opt_getint(lua_State *L, p_socket ps, int level, int name);
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static int opt_set(lua_State *L, p_socket ps, int level, int name,
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void *val, int len);
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static int opt_get(lua_State *L, p_socket ps, int level, int name,
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void *val, int* len);
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/*=========================================================================*\
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* Exported functions
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\*=========================================================================*/
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/*-------------------------------------------------------------------------*\
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* Calls appropriate option handler
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\*-------------------------------------------------------------------------*/
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int opt_meth_setoption(lua_State *L, p_opt opt, p_socket ps)
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{
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const char *name = luaL_checkstring(L, 2); /* obj, name, ... */
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while (opt->name && strcmp(name, opt->name))
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opt++;
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if (!opt->func) {
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char msg[45];
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sprintf(msg, "unsupported option `%.35s'", name);
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luaL_argerror(L, 2, msg);
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}
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return opt->func(L, ps);
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}
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int opt_meth_getoption(lua_State *L, p_opt opt, p_socket ps)
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{
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const char *name = luaL_checkstring(L, 2); /* obj, name, ... */
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while (opt->name && strcmp(name, opt->name))
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opt++;
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if (!opt->func) {
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char msg[45];
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sprintf(msg, "unsupported option `%.35s'", name);
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luaL_argerror(L, 2, msg);
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}
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return opt->func(L, ps);
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}
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/* enables reuse of local address */
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int opt_set_reuseaddr(lua_State *L, p_socket ps)
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{
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return opt_setboolean(L, ps, SOL_SOCKET, SO_REUSEADDR);
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}
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int opt_get_reuseaddr(lua_State *L, p_socket ps)
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{
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return opt_getboolean(L, ps, SOL_SOCKET, SO_REUSEADDR);
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}
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/* enables reuse of local port */
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int opt_set_reuseport(lua_State *L, p_socket ps)
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{
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return opt_setboolean(L, ps, SOL_SOCKET, SO_REUSEPORT);
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}
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int opt_get_reuseport(lua_State *L, p_socket ps)
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{
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return opt_getboolean(L, ps, SOL_SOCKET, SO_REUSEPORT);
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}
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/* disables the Naggle algorithm */
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int opt_set_tcp_nodelay(lua_State *L, p_socket ps)
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{
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return opt_setboolean(L, ps, IPPROTO_TCP, TCP_NODELAY);
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}
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int opt_get_tcp_nodelay(lua_State *L, p_socket ps)
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{
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return opt_getboolean(L, ps, IPPROTO_TCP, TCP_NODELAY);
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}
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int opt_set_keepalive(lua_State *L, p_socket ps)
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{
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return opt_setboolean(L, ps, SOL_SOCKET, SO_KEEPALIVE);
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}
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int opt_get_keepalive(lua_State *L, p_socket ps)
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{
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return opt_getboolean(L, ps, SOL_SOCKET, SO_KEEPALIVE);
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}
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int opt_set_dontroute(lua_State *L, p_socket ps)
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{
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return opt_setboolean(L, ps, SOL_SOCKET, SO_DONTROUTE);
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}
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int opt_set_broadcast(lua_State *L, p_socket ps)
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{
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return opt_setboolean(L, ps, SOL_SOCKET, SO_BROADCAST);
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}
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int opt_set_ip6_unicast_hops(lua_State *L, p_socket ps)
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{
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return opt_setint(L, ps, IPPROTO_IPV6, IPV6_UNICAST_HOPS);
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}
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int opt_get_ip6_unicast_hops(lua_State *L, p_socket ps)
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{
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return opt_getint(L, ps, IPPROTO_IPV6, IPV6_UNICAST_HOPS);
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}
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int opt_set_ip6_multicast_hops(lua_State *L, p_socket ps)
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{
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return opt_setint(L, ps, IPPROTO_IPV6, IPV6_MULTICAST_HOPS);
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}
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int opt_get_ip6_multicast_hops(lua_State *L, p_socket ps)
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{
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return opt_getint(L, ps, IPPROTO_IPV6, IPV6_MULTICAST_HOPS);
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}
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int opt_set_ip_multicast_loop(lua_State *L, p_socket ps)
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{
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return opt_setboolean(L, ps, IPPROTO_IP, IP_MULTICAST_LOOP);
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}
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int opt_get_ip_multicast_loop(lua_State *L, p_socket ps)
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{
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return opt_getboolean(L, ps, IPPROTO_IP, IP_MULTICAST_LOOP);
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}
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int opt_set_ip6_multicast_loop(lua_State *L, p_socket ps)
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{
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return opt_setboolean(L, ps, IPPROTO_IPV6, IPV6_MULTICAST_LOOP);
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}
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int opt_get_ip6_multicast_loop(lua_State *L, p_socket ps)
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{
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return opt_getboolean(L, ps, IPPROTO_IPV6, IPV6_MULTICAST_LOOP);
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}
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int opt_set_linger(lua_State *L, p_socket ps)
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{
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struct linger li; /* obj, name, table */
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if (!lua_istable(L, 3)) auxiliar_typeerror(L,3,lua_typename(L, LUA_TTABLE));
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lua_pushstring(L, "on");
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lua_gettable(L, 3);
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if (!lua_isboolean(L, -1))
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luaL_argerror(L, 3, "boolean 'on' field expected");
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li.l_onoff = (u_short) lua_toboolean(L, -1);
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lua_pushstring(L, "timeout");
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lua_gettable(L, 3);
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if (!lua_isnumber(L, -1))
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luaL_argerror(L, 3, "number 'timeout' field expected");
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li.l_linger = (u_short) lua_tonumber(L, -1);
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return opt_set(L, ps, SOL_SOCKET, SO_LINGER, (char *) &li, sizeof(li));
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}
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int opt_get_linger(lua_State *L, p_socket ps)
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{
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struct linger li; /* obj, name */
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int len = sizeof(li);
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int err = opt_get(L, ps, SOL_SOCKET, SO_LINGER, (char *) &li, &len);
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if (err)
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return err;
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lua_newtable(L);
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lua_pushboolean(L, li.l_onoff);
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lua_setfield(L, -2, "on");
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lua_pushinteger(L, li.l_linger);
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lua_setfield(L, -2, "timeout");
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return 1;
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}
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int opt_set_ip_multicast_ttl(lua_State *L, p_socket ps)
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{
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return opt_setint(L, ps, IPPROTO_IP, IP_MULTICAST_TTL);
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}
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int opt_set_ip_multicast_if(lua_State *L, p_socket ps)
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{
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const char *address = luaL_checkstring(L, 3); /* obj, name, ip */
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struct in_addr val;
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val.s_addr = htonl(INADDR_ANY);
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if (strcmp(address, "*") && !inet_aton(address, &val))
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luaL_argerror(L, 3, "ip expected");
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return opt_set(L, ps, IPPROTO_IP, IP_MULTICAST_IF,
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(char *) &val, sizeof(val));
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}
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int opt_get_ip_multicast_if(lua_State *L, p_socket ps)
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{
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struct in_addr val;
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socklen_t len = sizeof(val);
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if (getsockopt(*ps, IPPROTO_IP, IP_MULTICAST_IF, (char *) &val, &len) < 0) {
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lua_pushnil(L);
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lua_pushstring(L, "getsockopt failed");
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return 2;
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}
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lua_pushstring(L, inet_ntoa(val));
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return 1;
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}
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int opt_set_ip_add_membership(lua_State *L, p_socket ps)
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{
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return opt_setmembership(L, ps, IPPROTO_IP, IP_ADD_MEMBERSHIP);
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}
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int opt_set_ip_drop_membersip(lua_State *L, p_socket ps)
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{
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return opt_setmembership(L, ps, IPPROTO_IP, IP_DROP_MEMBERSHIP);
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}
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int opt_set_ip6_add_membership(lua_State *L, p_socket ps)
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{
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return opt_ip6_setmembership(L, ps, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP);
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}
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int opt_set_ip6_drop_membersip(lua_State *L, p_socket ps)
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{
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return opt_ip6_setmembership(L, ps, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP);
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}
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int opt_get_ip6_v6only(lua_State *L, p_socket ps)
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{
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return opt_getboolean(L, ps, IPPROTO_IPV6, IPV6_V6ONLY);
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}
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int opt_set_ip6_v6only(lua_State *L, p_socket ps)
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{
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return opt_setboolean(L, ps, IPPROTO_IPV6, IPV6_V6ONLY);
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}
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/*=========================================================================*\
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* Auxiliar functions
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\*=========================================================================*/
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static int opt_setmembership(lua_State *L, p_socket ps, int level, int name)
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{
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struct ip_mreq val; /* obj, name, table */
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if (!lua_istable(L, 3)) auxiliar_typeerror(L,3,lua_typename(L, LUA_TTABLE));
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lua_pushstring(L, "multiaddr");
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lua_gettable(L, 3);
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if (!lua_isstring(L, -1))
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luaL_argerror(L, 3, "string 'multiaddr' field expected");
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if (!inet_aton(lua_tostring(L, -1), &val.imr_multiaddr))
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luaL_argerror(L, 3, "invalid 'multiaddr' ip address");
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lua_pushstring(L, "interface");
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lua_gettable(L, 3);
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if (!lua_isstring(L, -1))
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luaL_argerror(L, 3, "string 'interface' field expected");
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val.imr_interface.s_addr = htonl(INADDR_ANY);
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if (strcmp(lua_tostring(L, -1), "*") &&
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!inet_aton(lua_tostring(L, -1), &val.imr_interface))
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luaL_argerror(L, 3, "invalid 'interface' ip address");
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return opt_set(L, ps, level, name, (char *) &val, sizeof(val));
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}
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static int opt_ip6_setmembership(lua_State *L, p_socket ps, int level, int name)
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{
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struct ipv6_mreq val; /* obj, opt-name, table */
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memset(&val, 0, sizeof(val));
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if (!lua_istable(L, 3)) auxiliar_typeerror(L,3,lua_typename(L, LUA_TTABLE));
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lua_pushstring(L, "multiaddr");
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lua_gettable(L, 3);
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if (!lua_isstring(L, -1))
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luaL_argerror(L, 3, "string 'multiaddr' field expected");
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if (!inet_pton(AF_INET6, lua_tostring(L, -1), &val.ipv6mr_multiaddr))
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luaL_argerror(L, 3, "invalid 'multiaddr' ip address");
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lua_pushstring(L, "interface");
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lua_gettable(L, 3);
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/* By default we listen to interface on default route
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* (sigh). However, interface= can override it. We should
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* support either number, or name for it. Waiting for
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* windows port of if_nametoindex */
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if (!lua_isnil(L, -1)) {
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if (lua_isnumber(L, -1)) {
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val.ipv6mr_interface = (unsigned int) lua_tonumber(L, -1);
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} else
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luaL_argerror(L, -1, "number 'interface' field expected");
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}
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return opt_set(L, ps, level, name, (char *) &val, sizeof(val));
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}
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static
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int opt_get(lua_State *L, p_socket ps, int level, int name, void *val, int* len)
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{
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socklen_t socklen = *len;
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if (getsockopt(*ps, level, name, (char *) val, &socklen) < 0) {
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lua_pushnil(L);
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lua_pushstring(L, "getsockopt failed");
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return 2;
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}
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*len = socklen;
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return 0;
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}
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static
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int opt_set(lua_State *L, p_socket ps, int level, int name, void *val, int len)
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{
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if (setsockopt(*ps, level, name, (char *) val, len) < 0) {
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lua_pushnil(L);
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lua_pushstring(L, "setsockopt failed");
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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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static int opt_getboolean(lua_State *L, p_socket ps, int level, int name)
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{
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int val = 0;
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int len = sizeof(val);
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int err = opt_get(L, ps, level, name, (char *) &val, &len);
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if (err)
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return err;
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lua_pushboolean(L, val);
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return 1;
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}
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int opt_get_error(lua_State *L, p_socket ps)
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{
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int val = 0;
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socklen_t len = sizeof(val);
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if (getsockopt(*ps, SOL_SOCKET, SO_ERROR, (char *) &val, &len) < 0) {
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lua_pushnil(L);
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lua_pushstring(L, "getsockopt failed");
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return 2;
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}
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lua_pushstring(L, socket_strerror(val));
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return 1;
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}
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static int opt_setboolean(lua_State *L, p_socket ps, int level, int name)
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{
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int val = auxiliar_checkboolean(L, 3); /* obj, name, bool */
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return opt_set(L, ps, level, name, (char *) &val, sizeof(val));
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}
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static int opt_getint(lua_State *L, p_socket ps, int level, int name)
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{
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int val = 0;
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int len = sizeof(val);
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int err = opt_get(L, ps, level, name, (char *) &val, &len);
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if (err)
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return err;
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lua_pushnumber(L, val);
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return 1;
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}
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static int opt_setint(lua_State *L, p_socket ps, int level, int name)
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{
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int val = (int) lua_tonumber(L, 3); /* obj, name, int */
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return opt_set(L, ps, level, name, (char *) &val, sizeof(val));
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}
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} // end NS_SLUA
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