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nodemcu-firmware/components/modules/net.c

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// Module for network
#include "module.h"
#include "lauxlib.h"
#include "platform.h"
#include "lmem.h"
#include "ip_fmt.h"
#include "task/task.h"
#include <string.h>
#include <stdlib.h>
#include <string.h>
#include "lwip/api.h"
#include "lwip/err.h"
#include "lwip/ip_addr.h"
#include "lwip/dns.h"
#include "lwip/tcp.h"
#include "lwip/inet.h"
#include "lwip/igmp.h"
#include <esp_log.h>
// Some LWIP macros cause complaints with ptr NULL checks, so shut them off :(
#pragma GCC diagnostic ignored "-Waddress"
typedef enum net_type {
TYPE_TCP_SERVER = 0,
TYPE_TCP_CLIENT,
TYPE_UDP_SOCKET
} net_type;
static const char *NET_TABLES[] = {
"net.tcpserver",
"net.tcpsocket",
"net.udpsocket"
};
#define NET_TABLE_TCP_SERVER NET_TABLES[0]
#define NET_TABLE_TCP_CLIENT NET_TABLES[1]
#define NET_TABLE_UDP_SOCKET NET_TABLES[2]
#define TYPE_TCP TYPE_TCP_CLIENT
#define TYPE_UDP TYPE_UDP_SOCKET
static task_handle_t net_handler;
static task_handle_t dns_handler;
typedef enum {
EVT_SENT, EVT_RECV, EVT_ZEROREAD, EVT_CONNECTED, EVT_ERR
} bounce_event_t;
typedef struct netconn_bounce_event {
struct netconn *netconn;
bounce_event_t event;
err_t err;
uint16_t len;
} netconn_bounce_event_t;
struct lnet_userdata;
typedef struct dns_event {
ip_addr_t resolved_ip;
enum { DNS_STATIC, DNS_SOCKET } invoker;
union {
int cb_ref;
struct lnet_userdata *ud;
};
} dns_event_t;
// --- lwIP callbacks -----------------------------------------------------
// Caution - these run in a different RTOS thread!
static void lnet_netconn_callback(struct netconn *netconn, enum netconn_evt evt, u16_t len)
{
if (!netconn) return;
switch (evt)
{
case NETCONN_EVT_SENDPLUS:
case NETCONN_EVT_RCVPLUS:
case NETCONN_EVT_ERROR: break;
default: return; // we don't care about minus events
}
netconn_bounce_event_t *nbe = malloc(sizeof(netconn_bounce_event_t));
if (!nbe)
{
ESP_LOGE("net", "out of memory - lost event notification!");
return;
}
nbe->netconn = netconn;
nbe->len = len;
nbe->err = ERR_OK;
task_prio_t prio = TASK_PRIORITY_MEDIUM;
switch (evt)
{
case NETCONN_EVT_SENDPLUS:
nbe->event = (len == 0) ? EVT_CONNECTED : EVT_SENT; break;
case NETCONN_EVT_RCVPLUS:
nbe->event = (len == 0) ? EVT_ZEROREAD : EVT_RECV;
prio = TASK_PRIORITY_HIGH;
break;
case NETCONN_EVT_ERROR:
nbe->event = EVT_ERR;
nbe->err = netconn_err(netconn); // is this safe in this thread?
break;
default: break; // impossible
}
if (!task_post(prio, net_handler, (task_param_t)nbe))
ESP_LOGE("net", "out of task post slots - lost data!");
}
// This one may *also* run in the LVM thread
static void net_dns_cb(const char *name, const ip_addr_t *ipaddr, void *callback_arg) {
dns_event_t *ev = (dns_event_t *)callback_arg;
ev->resolved_ip = ipaddr ? *ipaddr : ip_addr_any;
if (!task_post_medium(dns_handler, (task_param_t)ev))
{
ESP_LOGE("net", "out of task post slots - lost DNS response for %s", name);
// And we also leaked the ev here :(
}
}
// --- active list (out of reach of the lwIP thread) ---------------------
typedef struct lnet_userdata {
enum net_type type;
int self_ref;
uint16_t port;
struct netconn *netconn;
bool closing;
union {
struct {
int cb_accept_ref;
int timeout;
} server;
struct {
int wait_dns;
int cb_dns_ref;
int cb_receive_ref;
int cb_sent_ref;
// Only for TCP:
bool connecting;
size_t num_send;
int cb_connect_ref;
int cb_disconnect_ref;
int cb_reconnect_ref;
} client;
};
struct lnet_userdata *next;
} lnet_userdata;
static lnet_userdata *active;
static void add_userdata_to_active(lnet_userdata *ud)
{
ud->next = active;
active = ud;
}
static void remove_userdata_from_active(lnet_userdata *ud)
{
if (!ud)
return;
for (lnet_userdata **i = &active; *i; i = &(*i)->next)
{
if (*i == ud)
{
*i = ud->next;
return;
}
}
}
static lnet_userdata *userdata_from_netconn(struct netconn *nc)
{
for (lnet_userdata *i = active; i; i = i->next)
if (i->netconn == nc)
return i;
return NULL;
}
// --- Forward declarations ----------------------------------------------
static void lsent_cb (lua_State *L, lnet_userdata *ud);
static void lrecv_cb (lua_State *L, lnet_userdata *ud);
static void laccept_cb (lua_State *L, lnet_userdata *ud);
static void lconnected_cb (lua_State *L, lnet_userdata *ud);
static void lerr_cb (lua_State *L, lnet_userdata *ud, err_t err);
static void ldnsstatic_cb (lua_State *L, int cb_ref, ip_addr_t *addr);
static void ldnsfound_cb (lua_State *L, lnet_userdata *ud, ip_addr_t *addr);
// --- Helper functions --------------------------------------------------
int lwip_lua_checkerr (lua_State *L, err_t err) {
switch (err) {
case ERR_OK: return 0;
case ERR_MEM: return luaL_error(L, "out of memory");
case ERR_BUF: return luaL_error(L, "buffer error");
case ERR_TIMEOUT: return luaL_error(L, "timeout");
case ERR_RTE: return luaL_error(L, "routing problem");
case ERR_INPROGRESS: return luaL_error(L, "in progress");
case ERR_VAL: return luaL_error(L, "illegal value");
case ERR_WOULDBLOCK: return luaL_error(L, "would block");
case ERR_ABRT: return luaL_error(L, "connection aborted");
case ERR_RST: return luaL_error(L, "connection reset");
case ERR_CLSD: return luaL_error(L, "connection closed");
case ERR_CONN: return luaL_error(L, "not connected");
case ERR_ARG: return luaL_error(L, "illegal argument");
case ERR_USE: return luaL_error(L, "address in use");
case ERR_IF: return luaL_error(L, "netif error");
case ERR_ISCONN: return luaL_error(L, "already connected");
default: return luaL_error(L, "unknown error");
}
}
lnet_userdata *net_create( lua_State *L, enum net_type type ) {
const char *mt = NET_TABLES[type];
lnet_userdata *ud = (lnet_userdata *)lua_newuserdata(L, sizeof(lnet_userdata));
if (!ud) return NULL;
luaL_getmetatable(L, mt);
lua_setmetatable(L, -2);
ud->type = type;
ud->self_ref = LUA_NOREF;
ud->netconn = NULL;
ud->closing = false;
switch (type) {
case TYPE_TCP_CLIENT:
ud->client.cb_connect_ref = LUA_NOREF;
ud->client.cb_reconnect_ref = LUA_NOREF;
ud->client.cb_disconnect_ref = LUA_NOREF;
ud->client.connecting = false;
// fall-through
case TYPE_UDP_SOCKET:
ud->client.wait_dns = 0;
ud->client.cb_dns_ref = LUA_NOREF;
ud->client.cb_receive_ref = LUA_NOREF;
ud->client.cb_sent_ref = LUA_NOREF;
break;
case TYPE_TCP_SERVER:
ud->server.cb_accept_ref = LUA_NOREF;
break;
}
add_userdata_to_active(ud);
return ud;
}
// --- LVM thread task handlers -----------------------------------------
void handle_net_event(task_param_t param, task_prio_t prio)
{
(void)prio;
netconn_bounce_event_t *pnbe = (netconn_bounce_event_t *)param;
netconn_bounce_event_t nbe = *pnbe;
free(pnbe); // free before we can hit any luaL_error()s
lnet_userdata *ud = userdata_from_netconn(nbe.netconn);
if (!ud)
return;
if (nbe.event == EVT_ERR)
{
lerr_cb(lua_getstate(), ud, nbe.err);
return;
}
if (ud->type == TYPE_TCP_CLIENT || ud->type == TYPE_UDP_SOCKET)
{
switch (nbe.event)
{
case EVT_CONNECTED:
if (ud->type == TYPE_TCP_CLIENT && ud->client.connecting)
{
ud->client.connecting = false;
lconnected_cb(lua_getstate(), ud);
}
break;
case EVT_SENT:
ud->client.num_send -= nbe.len;
if (ud->client.num_send == 0) // all data sent, trigger Lua callback
lsent_cb(lua_getstate(), ud);
break;
case EVT_RECV:
if (nbe.len > 0)
lrecv_cb(lua_getstate(), ud);
break;
case EVT_ZEROREAD: // fall-through
case EVT_ERR:
ud->closing = true;
lerr_cb(lua_getstate(), ud, nbe.err);
break;
}
}
else if (ud->type == TYPE_TCP_SERVER)
{
switch (nbe.event)
{
case EVT_ZEROREAD: // new connection
laccept_cb (lua_getstate(), ud);
break;
case EVT_ERR:
ud->closing = true;
lerr_cb(lua_getstate(), ud, nbe.err);
break;
default: break;
}
}
}
void handle_dns_event(task_param_t param, task_prio_t prio)
{
(void)prio;
dns_event_t *pev = (dns_event_t *)param;
dns_event_t ev = *pev;
lua_State *L = lua_getstate();
luaM_free(L, pev); // free before we can hit any luaL_error()s
switch (ev.invoker)
{
case DNS_STATIC:
ldnsstatic_cb(L, ev.cb_ref, &ev.resolved_ip);
break;
case DNS_SOCKET:
ldnsfound_cb(L, ev.ud, &ev.resolved_ip);
}
}
static err_t netconn_close_and_delete(struct netconn *conn) {
err_t err = netconn_close(conn);
if (err == ERR_OK)
netconn_delete(conn);
return err;
}
// --- Lua API - create
// Lua: net.createUDPSocket()
static int net_createUDPSocket( lua_State *L ) {
net_create(L, TYPE_UDP_SOCKET);
return 1;
}
// Lua: net.createServer(type, timeout)
static int net_createServer( lua_State *L ) {
int type, timeout;
type = luaL_optlong(L, 1, TYPE_TCP);
timeout = luaL_optlong(L, 2, 30);
if (type == TYPE_UDP) return net_createUDPSocket( L );
if (type != TYPE_TCP) return luaL_error(L, "invalid type");
lnet_userdata *ud = net_create(L, TYPE_TCP_SERVER);
ud->server.timeout = timeout;
return 1;
}
// Lua: net.createConnection(type, secure)
static int net_createConnection( lua_State *L ) {
int type, secure;
type = luaL_optlong(L, 1, TYPE_TCP);
secure = luaL_optlong(L, 2, 0);
if (type == TYPE_UDP) return net_createUDPSocket( L );
if (type != TYPE_TCP) return luaL_error(L, "invalid type");
if (secure) {
return luaL_error(L, "secure connections not yet supported");
}
net_create(L, TYPE_TCP_CLIENT);
return 1;
}
// --- Get & check userdata
static lnet_userdata *net_get_udata_s( lua_State *L, int stack ) {
if (!lua_isuserdata(L, stack)) return NULL;
lnet_userdata *ud = (lnet_userdata *)lua_touserdata(L, stack);
switch (ud->type) {
case TYPE_TCP_CLIENT:
case TYPE_TCP_SERVER:
case TYPE_UDP_SOCKET:
break;
default: return NULL;
}
const char *mt = NET_TABLES[ud->type];
ud = luaL_checkudata(L, stack, mt);
return ud;
}
#define net_get_udata(L) net_get_udata_s(L, 1)
static int lnet_socket_resolve_dns(lua_State *L, lnet_userdata *ud, const char * domain, bool close_on_err)
{
ud->client.wait_dns ++;
int unref = 0;
if (ud->self_ref == LUA_NOREF) {
unref = 1;
lua_pushvalue(L, 1);
ud->self_ref = luaL_ref(L, LUA_REGISTRYINDEX);
}
dns_event_t *ev = luaM_new(L, dns_event_t);
if (!ev)
return luaL_error (L, "out of memory");
ev->invoker = DNS_SOCKET;
ev->ud = ud;
err_t err = dns_gethostbyname(domain, &ev->resolved_ip, net_dns_cb, ev);
if (err == ERR_OK)
net_dns_cb(domain, &ev->resolved_ip, ev);
else if (err != ERR_INPROGRESS)
{
luaM_free(L, ev);
ud->client.wait_dns --;
if (unref) {
luaL_unref(L, LUA_REGISTRYINDEX, ud->self_ref);
ud->self_ref = LUA_NOREF;
}
if (close_on_err)
{
ud->closing = true;
if (netconn_close_and_delete(ud->netconn) == ERR_OK)
ud->netconn = NULL;
}
return lwip_lua_checkerr(L, err);
}
return 0;
}
// --- Lua API
// Lua: server:listen(port, addr, function(c)), socket:listen(port, addr)
static int net_listen( lua_State *L ) {
lnet_userdata *ud = net_get_udata(L);
if (!ud || ud->type == TYPE_TCP_CLIENT)
return luaL_error(L, "invalid user data");
if (ud->netconn)
return luaL_error(L, "already listening");
int stack = 2;
uint16_t port = 0;
const char *domain = "0.0.0.0";
if (lua_isnumber(L, stack))
port = lua_tointeger(L, stack++);
if (lua_isstring(L, stack)) {
size_t dl = 0;
domain = luaL_checklstring(L, stack++, &dl);
}
ip_addr_t addr;
if (!ipaddr_aton(domain, &addr))
return luaL_error(L, "invalid IP address");
if (ud->type == TYPE_TCP_SERVER) {
if (lua_isfunction(L, stack)) {
lua_pushvalue(L, stack++);
luaL_unref(L, LUA_REGISTRYINDEX, ud->server.cb_accept_ref);
ud->server.cb_accept_ref = luaL_ref(L, LUA_REGISTRYINDEX);
} else {
return luaL_error(L, "need callback");
}
}
err_t err = ERR_OK;
switch (ud->type) {
case TYPE_TCP_SERVER:
ud->netconn = netconn_new_with_callback(NETCONN_TCP, lnet_netconn_callback);
if (!ud->netconn)
return luaL_error(L, "cannot allocate netconn");
netconn_set_nonblocking(ud->netconn, 1);
err = netconn_bind(ud->netconn, &addr, port);
if (err == ERR_OK) {
err = netconn_listen(ud->netconn);
}
break;
case TYPE_UDP_SOCKET:
ud->netconn = netconn_new_with_callback(NETCONN_UDP, lnet_netconn_callback);
if (!ud->netconn)
return luaL_error(L, "cannot allocate netconn");
netconn_set_nonblocking(ud->netconn, 1);
err = netconn_bind(ud->netconn, &addr, port);
break;
default: break;
}
if (err != ERR_OK) {
ud->closing = true;
switch (ud->type) {
case TYPE_TCP_SERVER:
if (netconn_close_and_delete(ud->netconn) == ERR_OK)
ud->netconn = NULL;
break;
case TYPE_UDP_SOCKET:
if (netconn_close_and_delete(ud->netconn) == ERR_OK)
ud->netconn = NULL;
break;
default: break;
}
return lwip_lua_checkerr(L, err);
}
if (ud->self_ref == LUA_NOREF) {
lua_pushvalue(L, 1);
ud->self_ref = luaL_ref(L, LUA_REGISTRYINDEX);
}
return 0;
}
// Lua: client:connect(port, addr)
static int net_connect( lua_State *L ) {
lnet_userdata *ud = net_get_udata(L);
if (!ud || ud->type != TYPE_TCP_CLIENT)
return luaL_error(L, "invalid user data");
if (ud->netconn)
return luaL_error(L, "already connected");
uint16_t port = luaL_checkinteger(L, 2);
if (port == 0)
return luaL_error(L, "specify port");
const char *domain = "127.0.0.1";
if (lua_isstring(L, 3)) {
size_t dl = 0;
domain = luaL_checklstring(L, 3, &dl);
}
ud->netconn = netconn_new_with_callback(NETCONN_TCP, lnet_netconn_callback);
if (!ud->netconn)
return luaL_error(L, "cannot allocate netconn");
netconn_set_nonblocking(ud->netconn, 1);
ud->port = port;
return lnet_socket_resolve_dns(L, ud, domain, true);
}
// Lua: client/socket:on(name, callback)
static int net_on( lua_State *L ) {
lnet_userdata *ud = net_get_udata(L);
if (!ud || ud->type == TYPE_TCP_SERVER)
return luaL_error(L, "invalid user data");
int *refptr = NULL;
const char *name = luaL_checkstring(L, 2);
if (!name) return luaL_error(L, "need callback name");
switch (ud->type) {
case TYPE_TCP_CLIENT:
if (strcmp("connection",name)==0)
{ refptr = &ud->client.cb_connect_ref; break; }
if (strcmp("disconnection",name)==0)
{ refptr = &ud->client.cb_disconnect_ref; break; }
if (strcmp("reconnection",name)==0)
{ refptr = &ud->client.cb_reconnect_ref; break; }
// fall-through
case TYPE_UDP_SOCKET:
if (strcmp("dns",name)==0)
{ refptr = &ud->client.cb_dns_ref; break; }
if (strcmp("receive",name)==0)
{ refptr = &ud->client.cb_receive_ref; break; }
if (strcmp("sent",name)==0)
{ refptr = &ud->client.cb_sent_ref; break; }
break;
default: return luaL_error(L, "invalid user data");
}
if (refptr == NULL)
return luaL_error(L, "invalid callback name");
if (lua_isfunction(L, 3)) {
lua_pushvalue(L, 3);
luaL_unref(L, LUA_REGISTRYINDEX, *refptr);
*refptr = luaL_ref(L, LUA_REGISTRYINDEX);
} else if (lua_isnil(L, 3)) {
luaL_unref(L, LUA_REGISTRYINDEX, *refptr);
*refptr = LUA_NOREF;
} else {
return luaL_error(L, "invalid callback function");
}
return 0;
}
// Lua: client:send(data, function(c)), socket:send(port, ip, data, function(s))
static int net_send( lua_State *L ) {
lnet_userdata *ud = net_get_udata(L);
if (!ud || ud->type == TYPE_TCP_SERVER)
return luaL_error(L, "invalid user data");
ip_addr_t addr;
uint16_t port = 0;
const char *data;
size_t datalen = 0;
int stack = 2;
if (ud->type == TYPE_UDP_SOCKET) {
size_t dl = 0;
port = luaL_checkinteger(L, stack++);
if (port == 0) return luaL_error(L, "need port");
const char *domain = luaL_checklstring(L, stack++, &dl);
if (!domain) return luaL_error(L, "need IP address");
if (!ipaddr_aton(domain, &addr)) return luaL_error(L, "invalid IP address");
}
data = luaL_checklstring(L, stack++, &datalen);
if (!data || datalen == 0) return luaL_error(L, "no data to send");
ud->client.num_send = datalen;
if (lua_isfunction(L, stack)) {
lua_pushvalue(L, stack++);
luaL_unref(L, LUA_REGISTRYINDEX, ud->client.cb_sent_ref);
ud->client.cb_sent_ref = luaL_ref(L, LUA_REGISTRYINDEX);
}
if (ud->type == TYPE_UDP_SOCKET && !ud->netconn) {
ud->netconn = netconn_new_with_callback(NETCONN_UDP, lnet_netconn_callback);
if (!ud->netconn)
return luaL_error(L, "cannot allocate netconn");
err_t err = netconn_bind(ud->netconn, IP_ADDR_ANY, 0);
if (err != ERR_OK) {
ud->closing = true;
if (netconn_close_and_delete(ud->netconn) == ERR_OK)
ud->netconn = NULL;
return lwip_lua_checkerr(L, err);
}
if (ud->self_ref == LUA_NOREF) {
lua_pushvalue(L, 1);
ud->self_ref = luaL_ref(L, LUA_REGISTRYINDEX);
}
}
if (!ud->netconn || ud->self_ref == LUA_NOREF)
return luaL_error(L, "not connected");
err_t err;
if (ud->type == TYPE_UDP_SOCKET) {
struct netbuf *buf = netbuf_new();
if (!buf || !netbuf_alloc(buf, datalen))
return luaL_error(L, "cannot allocate message buffer");
netbuf_take(buf, data, datalen);
err = netconn_sendto(ud->netconn, buf, &addr, port);
netbuf_delete(buf);
if (ud->client.cb_sent_ref != LUA_NOREF) {
lua_rawgeti(L, LUA_REGISTRYINDEX, ud->client.cb_sent_ref);
lua_rawgeti(L, LUA_REGISTRYINDEX, ud->self_ref);
lua_call(L, 1, 0);
}
} else if (ud->type == TYPE_TCP_CLIENT) {
size_t bytes_written;
err = netconn_write_partly(ud->netconn, data, datalen, NETCONN_COPY, &bytes_written);
if (err == ERR_OK && (datalen != bytes_written)) {
// the string object is potentially gc'ed after net_send finishes and we can't ensure
// integrity of the data pointer to netconn -> signal error to Lua layer
err = ERR_BUF;
}
}
else {
err = ERR_VAL;
}
return lwip_lua_checkerr(L, err);
}
// Lua: client/socket:dns(domain, callback(socket, addr))
static int net_dns( lua_State *L ) {
lnet_userdata *ud = net_get_udata(L);
if (!ud || ud->type == TYPE_TCP_SERVER)
return luaL_error(L, "invalid user data");
size_t dl = 0;
const char *domain = luaL_checklstring(L, 2, &dl);
if (!domain)
return luaL_error(L, "no domain specified");
if (lua_isfunction(L, 3)) {
luaL_unref(L, LUA_REGISTRYINDEX, ud->client.cb_dns_ref);
lua_pushvalue(L, 3);
ud->client.cb_dns_ref = luaL_ref(L, LUA_REGISTRYINDEX);
}
if (ud->client.cb_dns_ref == LUA_NOREF)
return luaL_error(L, "no callback specified");
return lnet_socket_resolve_dns(L, ud, domain, false);
}
// Lua: client:getpeer()
static int net_getpeer( lua_State *L ) {
lnet_userdata *ud = net_get_udata(L);
if (!ud || ud->type != TYPE_TCP_CLIENT)
return luaL_error(L, "invalid user data");
if (!ud->netconn) {
lua_pushnil(L);
lua_pushnil(L);
return 2;
}
uint16_t port;
ip_addr_t addr;
netconn_peer(ud->netconn, &addr, &port);
if (port == 0) {
lua_pushnil(L);
lua_pushnil(L);
return 2;
}
char addr_str[IP_STR_SZ];
ipstr (addr_str, &addr);
lua_pushinteger(L, port);
lua_pushstring(L, addr_str);
return 2;
}
// Lua: client/server/socket:getaddr()
static int net_getaddr( lua_State *L ) {
lnet_userdata *ud = net_get_udata(L);
if (!ud) return luaL_error(L, "invalid user data");
if (!ud->netconn) {
lua_pushnil(L);
lua_pushnil(L);
return 2;
}
uint16_t port = 0;
ip_addr_t addr;
switch (ud->type) {
case TYPE_TCP_CLIENT:
case TYPE_TCP_SERVER:
case TYPE_UDP_SOCKET:
netconn_addr(ud->netconn, &addr, &port);
break;
default: break;
}
if (port == 0) {
lua_pushnil(L);
lua_pushnil(L);
return 2;
}
char addr_str[IP_STR_SZ];
ipstr (addr_str, &addr);
lua_pushinteger(L, port);
lua_pushstring(L, addr_str);
return 2;
}
// Lua: client/server/socket:close()
static int net_close( lua_State *L ) {
err_t err = ERR_OK;
lnet_userdata *ud = net_get_udata(L);
if (!ud) return luaL_error(L, "invalid user data");
if (ud->netconn) {
switch (ud->type) {
case TYPE_TCP_CLIENT:
case TYPE_TCP_SERVER:
case TYPE_UDP_SOCKET:
ud->closing = true;
err = netconn_close_and_delete(ud->netconn);
if (err == ERR_OK)
ud->netconn = NULL;
break;
default: break;
}
} else {
return luaL_error(L, "not connected");
}
if (ud->type == TYPE_TCP_SERVER ||
(ud->netconn == NULL && ud->client.wait_dns == 0)) {
lua_gc(L, LUA_GCSTOP, 0);
luaL_unref(L, LUA_REGISTRYINDEX, ud->self_ref);
ud->self_ref = LUA_NOREF;
lua_gc(L, LUA_GCRESTART, 0);
}
return lwip_lua_checkerr(L, err);
}
static int net_delete( lua_State *L ) {
lnet_userdata *ud = net_get_udata(L);
if (!ud) return luaL_error(L, "no user data");
if (ud->netconn) {
switch (ud->type) {
case TYPE_TCP_CLIENT:
case TYPE_TCP_SERVER:
case TYPE_UDP_SOCKET:
ud->closing = true;
netconn_delete(ud->netconn);
ud->netconn = NULL;
break;
default: break;
}
}
switch (ud->type) {
case TYPE_TCP_CLIENT:
luaL_unref(L, LUA_REGISTRYINDEX, ud->client.cb_connect_ref);
ud->client.cb_connect_ref = LUA_NOREF;
luaL_unref(L, LUA_REGISTRYINDEX, ud->client.cb_disconnect_ref);
ud->client.cb_disconnect_ref = LUA_NOREF;
luaL_unref(L, LUA_REGISTRYINDEX, ud->client.cb_reconnect_ref);
ud->client.cb_reconnect_ref = LUA_NOREF;
// fall-through
case TYPE_UDP_SOCKET:
luaL_unref(L, LUA_REGISTRYINDEX, ud->client.cb_dns_ref);
ud->client.cb_dns_ref = LUA_NOREF;
luaL_unref(L, LUA_REGISTRYINDEX, ud->client.cb_receive_ref);
ud->client.cb_receive_ref = LUA_NOREF;
luaL_unref(L, LUA_REGISTRYINDEX, ud->client.cb_sent_ref);
ud->client.cb_sent_ref = LUA_NOREF;
break;
case TYPE_TCP_SERVER:
luaL_unref(L, LUA_REGISTRYINDEX, ud->server.cb_accept_ref);
ud->server.cb_accept_ref = LUA_NOREF;
break;
}
lua_gc(L, LUA_GCSTOP, 0);
luaL_unref(L, LUA_REGISTRYINDEX, ud->self_ref);
ud->self_ref = LUA_NOREF;
remove_userdata_from_active(ud);
lua_gc(L, LUA_GCRESTART, 0);
return 0;
}
// --- Multicast
static int net_multicastJoinLeave( lua_State *L, int join) {
size_t il;
ip4_addr_t multicast_addr;
ip4_addr_t if_addr;
const char *multicast_ip;
const char *if_ip;
NODE_DBG("net_multicastJoin is called.\n");
if(! lua_isstring(L,1) ) return luaL_error( L, "wrong arg type" );
if_ip = luaL_checklstring( L, 1, &il );
if (if_ip != NULL)
if ( if_ip[0] == '\0' || strcasecmp(if_ip,"any") == 0)
{
if_ip = "0.0.0.0";
il = 7;
}
if (if_ip == NULL || il > 15 || il < 7) return luaL_error( L, "invalid if ip" );
ip4addr_aton (if_ip, &if_addr);
if(! lua_isstring(L,2) ) return luaL_error( L, "wrong arg type" );
multicast_ip = luaL_checklstring( L, 2, &il );
if (multicast_ip == NULL || il > 15 || il < 7) return luaL_error( L, "invalid multicast ip" );
ip4addr_aton (multicast_ip, &multicast_addr);
if (join)
{
igmp_joingroup(&if_addr, &multicast_addr);
}
else
{
igmp_leavegroup(&if_addr, &multicast_addr);
}
return 0;
}
// Lua: net.multicastJoin(ifip, multicastip)
// if ifip "" or "any" all interfaces are affected
static int net_multicastJoin( lua_State* L ) {
return net_multicastJoinLeave(L,1);
}
// Lua: net.multicastLeave(ifip, multicastip)
// if ifip "" or "any" all interfaces are affected
static int net_multicastLeave( lua_State* L ) {
return net_multicastJoinLeave(L,0);
}
// --- DNS ---------------------------------------------------------------
// Lua: net.dns.resolve( domain, function(ip) )
static int net_dns_static( lua_State* L ) {
size_t dl;
const char* domain = luaL_checklstring(L, 1, &dl);
if (!domain && dl > 128) {
return luaL_error(L, "domain name too long");
}
luaL_checkfunction(L, 2);
lua_settop(L, 2);
dns_event_t *ev = luaM_new(L, dns_event_t);
if (!ev)
return luaL_error (L, "out of memory");
ev->cb_ref = luaL_ref(L, LUA_REGISTRYINDEX);
ev->invoker = DNS_STATIC;
err_t err = dns_gethostbyname(domain, &ev->resolved_ip, net_dns_cb, ev);
if (err == ERR_OK)
net_dns_cb(domain, &ev->resolved_ip, ev);
else if (err != ERR_INPROGRESS)
{
luaM_free(L, ev);
lwip_lua_checkerr(L, err);
}
return 0;
}
// Lua: s = net.dns.setdnsserver(ip_addr, [index])
static int net_setdnsserver( lua_State* L ) {
size_t l;
ip_addr_t ipaddr;
const char *server = luaL_checklstring( L, 1, &l );
if (l>16 || server == NULL ||
!ipaddr_aton (server, &ipaddr) || ip_addr_isany (&ipaddr))
return luaL_error( L, "invalid dns server ip" );
int numdns = luaL_optint(L, 2, 0);
if (numdns >= DNS_MAX_SERVERS)
return luaL_error( L, "server index out of range [0-%d]", DNS_MAX_SERVERS - 1);
dns_setserver(numdns,&ipaddr);
return 0;
}
// Lua: s = net.dns.getdnsserver([index])
static int net_getdnsserver( lua_State* L ) {
int numdns = luaL_optint(L, 1, 0);
if (numdns >= DNS_MAX_SERVERS)
return luaL_error( L, "server index out of range [0-%d]", DNS_MAX_SERVERS - 1);
// ip_addr_t ipaddr;
// dns_getserver(numdns,&ipaddr);
// Bug fix by @md5crypt https://github.com/nodemcu/nodemcu-firmware/pull/500
const ip_addr_t *ipaddr = dns_getserver(numdns);
if ( ip_addr_isany(ipaddr) ) {
lua_pushnil( L );
} else {
char temp[IP_STR_SZ];
ipstr (temp, ipaddr);
lua_pushstring( L, temp );
}
return 1;
}
// --- Lua event dispatch -----------------------------------------------
static void ldnsfound_cb (lua_State *L, lnet_userdata *ud, ip_addr_t *addr) {
if (ud->self_ref != LUA_NOREF && ud->client.cb_dns_ref != LUA_NOREF) {
lua_rawgeti(L, LUA_REGISTRYINDEX, ud->client.cb_dns_ref);
lua_rawgeti(L, LUA_REGISTRYINDEX, ud->self_ref);
if (!ip_addr_isany (addr)) {
char iptmp[IP_STR_SZ];
ipstr (iptmp, addr);
lua_pushstring(L, iptmp);
} else {
lua_pushnil(L);
}
luaL_pcallx(L, 2, 0);
}
ud->client.wait_dns --;
if (ud->netconn && ud->type == TYPE_TCP_CLIENT && !ud->client.connecting) {
ud->client.connecting = true;
netconn_connect(ud->netconn, addr, ud->port);
} else if (!ud->netconn && ud->client.wait_dns == 0) {
lua_gc(L, LUA_GCSTOP, 0);
luaL_unref(L, LUA_REGISTRYINDEX, ud->self_ref);
ud->self_ref = LUA_NOREF;
lua_gc(L, LUA_GCRESTART, 0);
}
}
static void ldnsstatic_cb (lua_State *L, int cb_ref, ip_addr_t *addr) {
if (cb_ref == LUA_NOREF)
return;
lua_rawgeti(L, LUA_REGISTRYINDEX, cb_ref);
luaL_unref (L, LUA_REGISTRYINDEX, cb_ref);
if (!ip_addr_isany (addr)) {
char iptmp[IP_STR_SZ];
ipstr (iptmp, addr);
lua_pushstring(L, iptmp);
} else {
lua_pushnil(L);
}
luaL_pcallx(L, 1, 0);
}
static void lconnected_cb (lua_State *L, lnet_userdata *ud) {
if (ud->self_ref != LUA_NOREF && ud->client.cb_connect_ref != LUA_NOREF) {
lua_rawgeti(L, LUA_REGISTRYINDEX, ud->client.cb_connect_ref);
lua_rawgeti(L, LUA_REGISTRYINDEX, ud->self_ref);
luaL_pcallx(L, 1, 0);
}
}
static void lrecv_cb (lua_State *L, lnet_userdata *ud) {
if (!ud || !ud->netconn) return;
struct netbuf *p;
char *payload;
uint16_t len;
err_t err = netconn_recv(ud->netconn, &p);
if (err != ERR_OK || !p) {
lwip_lua_checkerr(L, err);
return;
}
netbuf_first(p);
do {
netbuf_data(p, (void **)&payload, &len);
if (ud->client.cb_receive_ref != LUA_NOREF){
lua_rawgeti(L, LUA_REGISTRYINDEX, ud->client.cb_receive_ref);
int num_args = 2;
lua_rawgeti(L, LUA_REGISTRYINDEX, ud->self_ref);
lua_pushlstring(L, payload, len);
if (ud->type == TYPE_UDP_SOCKET) {
num_args += 2;
char iptmp[IP_STR_SZ];
ip_addr_t *addr = netbuf_fromaddr(p);
uint16_t port = netbuf_fromport(p);
ipstr (iptmp, addr);
lua_pushinteger(L, port);
lua_pushstring(L, iptmp);
}
luaL_pcallx(L, num_args, 0);
}
} while (netbuf_next(p) != -1);
if (p)
netbuf_delete(p);
}
static void laccept_cb (lua_State *L, lnet_userdata *ud) {
if (!ud || !ud->netconn) return;
lua_rawgeti(L, LUA_REGISTRYINDEX, ud->server.cb_accept_ref);
lnet_userdata *nud = net_create(L, TYPE_TCP_CLIENT);
lua_pushvalue(L, -1);
nud->self_ref = luaL_ref(L, LUA_REGISTRYINDEX);
struct netconn *newconn;
err_t err = netconn_accept(ud->netconn, &newconn);
if (err == ERR_OK) {
nud->netconn = newconn;
netconn_set_nonblocking(nud->netconn, 1);
nud->netconn->pcb.tcp->so_options |= SOF_KEEPALIVE;
nud->netconn->pcb.tcp->keep_idle = ud->server.timeout * 1000;
nud->netconn->pcb.tcp->keep_cnt = 1;
} else
luaL_error(L, "cannot accept new server socket connection");
luaL_pcallx(L, 1, 0);
}
static void lsent_cb (lua_State *L, lnet_userdata *ud) {
if (ud->client.cb_sent_ref != LUA_NOREF) {
lua_rawgeti(L, LUA_REGISTRYINDEX, ud->client.cb_sent_ref);
lua_rawgeti(L, LUA_REGISTRYINDEX, ud->self_ref);
luaL_pcallx(L, 1, 0);
}
}
static void lerr_cb (lua_State *L, lnet_userdata *ud, err_t err)
{
if (!ud || !ud->netconn) return;
int ref;
if (err != ERR_OK && ud->client.cb_reconnect_ref != LUA_NOREF)
ref = ud->client.cb_reconnect_ref;
else ref = ud->client.cb_disconnect_ref;
if (ref != LUA_NOREF) {
lua_rawgeti(L, LUA_REGISTRYINDEX, ref);
lua_rawgeti(L, LUA_REGISTRYINDEX, ud->self_ref);
lua_pushinteger(L, err);
luaL_pcallx(L, 2, 0);
}
if (ud->client.wait_dns == 0) {
lua_gc(L, LUA_GCSTOP, 0);
luaL_unref(L, LUA_REGISTRYINDEX, ud->self_ref);
ud->self_ref = LUA_NOREF;
lua_gc(L, LUA_GCRESTART, 0);
}
}
// --- Tables
// Module function map
LROT_BEGIN(net_tcpserver, NULL, 0)
LROT_FUNCENTRY( listen, net_listen )
LROT_FUNCENTRY( getaddr, net_getaddr )
LROT_FUNCENTRY( close, net_close )
LROT_FUNCENTRY( __gc, net_delete )
LROT_TABENTRY ( __index, net_tcpserver )
LROT_END(net_tcpserver, NULL, 0)
LROT_BEGIN(net_tcpsocket, NULL, 0)
LROT_FUNCENTRY( connect, net_connect )
LROT_FUNCENTRY( close, net_close )
LROT_FUNCENTRY( on, net_on )
LROT_FUNCENTRY( send, net_send )
LROT_FUNCENTRY( dns, net_dns )
LROT_FUNCENTRY( getpeer, net_getpeer )
LROT_FUNCENTRY( getaddr, net_getaddr )
LROT_FUNCENTRY( __gc, net_delete )
LROT_TABENTRY ( __index, net_tcpsocket )
LROT_END(net_tcpsocket, NULL, 0)
LROT_BEGIN(net_udpsocket, NULL, 0)
LROT_FUNCENTRY( listen, net_listen )
LROT_FUNCENTRY( close, net_close )
LROT_FUNCENTRY( on, net_on )
LROT_FUNCENTRY( send, net_send )
LROT_FUNCENTRY( dns, net_dns )
LROT_FUNCENTRY( getaddr, net_getaddr )
LROT_FUNCENTRY( __gc, net_delete )
LROT_TABENTRY ( __index, net_udpsocket )
LROT_END(net_udpsocket, NULL, 0)
LROT_BEGIN(net_dns, NULL, 0)
LROT_FUNCENTRY( setdnsserver, net_setdnsserver )
LROT_FUNCENTRY( getdnsserver, net_getdnsserver )
LROT_FUNCENTRY( resolve, net_dns_static )
LROT_END(net_dns, NULL, 0)
LROT_BEGIN(net, NULL, 0)
LROT_FUNCENTRY( createServer, net_createServer )
LROT_FUNCENTRY( createConnection, net_createConnection )
LROT_FUNCENTRY( createUDPSocket, net_createUDPSocket )
LROT_FUNCENTRY( multicastJoin, net_multicastJoin )
LROT_FUNCENTRY( multicastLeave, net_multicastLeave )
LROT_TABENTRY ( dns, net_dns )
LROT_NUMENTRY ( TCP, TYPE_TCP )
LROT_NUMENTRY ( UDP, TYPE_UDP )
LROT_TABENTRY ( __metatable, net )
LROT_END(net, NULL, 0)
int luaopen_net( lua_State *L ) {
igmp_init();
luaL_rometatable(L, NET_TABLE_TCP_SERVER, LROT_TABLEREF(net_tcpserver));
luaL_rometatable(L, NET_TABLE_TCP_CLIENT, LROT_TABLEREF(net_tcpsocket));
luaL_rometatable(L, NET_TABLE_UDP_SOCKET, LROT_TABLEREF(net_udpsocket));
net_handler = task_get_id(handle_net_event);
dns_handler = task_get_id(handle_dns_event);
return 0;
}
NODEMCU_MODULE(NET, "net", net, luaopen_net);
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