Function meth_receive

Plugins/UnLuaExtensions/LuaSocket/Source/src/unixdgram.cpp:173–197

}

static int meth_receive(lua_State *L) {
    p_unix un = (p_unix) auxiliar_checkgroup(L, "unixdgram{any}", 1);
    char buf[UNIXDGRAM_DATAGRAMSIZE];
    size_t got, wanted = (size_t) luaL_optnumber(L, 2, sizeof(buf));
    char *dgram = wanted > sizeof(buf)? (char *) malloc(wanted): buf;
    int err;
    p_timeout tm = &un->tm;
    timeout_markstart(tm);
    if (!dgram) {
        lua_pushnil(L);
        lua_pushliteral(L, "out of memory");
        return 2;
    }
    err = socket_recv(&un->sock, dgram, wanted, &got, tm);
    /* Unlike STREAM, recv() of zero is not closed, but a zero-length packet. */
    if (err != IO_DONE && err != IO_CLOSED) {
        lua_pushnil(L);
        lua_pushstring(L, unixdgram_strerror(err));
        if (wanted > sizeof(buf)) free(dgram);
        return 2;
    }
    lua_pushlstring(L, dgram, got);
    if (wanted > sizeof(buf)) free(dgram);
    return 1;
}

/*-------------------------------------------------------------------------*\
* Receives data and sender from a DGRAM socket