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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"
// 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;
typedef const char net_table_name[14];
static const net_table_name 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
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;
int hold;
size_t num_held;
size_t num_send;
int cb_connect_ref;
int cb_disconnect_ref;
int cb_reconnect_ref;
} client;
};
} lnet_userdata;
// --- Event handling
typedef struct {
enum {
DNSFOUND,
DNSSTATIC,
CONNECTED,
ACCEPT,
RECVDATA,
SENTDATA,
ERR
} event;
union {
lnet_userdata *ud;
int cb_ref;
};
union {
ip_addr_t resolved_ip;
int err;
};
} lnet_event;
static task_handle_t net_event;
// --- LWIP errors
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");
}
}
// --- Create
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.hold = 0;
ud->client.num_held = 0;
ud->client.connecting = false;
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;
}
return ud;
}
// --- LWIP callbacks and task_post helpers
static bool post_net_err (lnet_userdata *ud, err_t err) {
lnet_event *ev = (lnet_event *)malloc (sizeof (lnet_event));
if (!ev)
return false;
ev->event = ERR;
ev->ud = ud;
ev->err = err;
if (!task_post_medium (net_event, (task_param_t)ev)) {
free (ev);
return false;
}
return true;
}
static bool post_net_connected (lnet_userdata *ud) {
lnet_event *ev = (lnet_event *)malloc (sizeof (lnet_event));
if (!ev)
return false;
ev->event = CONNECTED;
ev->ud = ud;
if (!task_post_medium (net_event, (task_param_t)ev)) {
free (ev);
return false;
}
return true;
}
static bool post_net_dns (lnet_userdata *ud, const char *name, const ip_addr_t *ipaddr)
{
lnet_event *ev = (lnet_event *)malloc (sizeof (lnet_event));
if (!ev || !ipaddr)
return false;
ev->event = DNSFOUND;
ev->ud = ud;
ev->resolved_ip = *ipaddr;
if (!task_post_medium (net_event, (task_param_t)ev)) {
free (ev);
return false;
}
return true;
}
static void net_dns_cb(const char *name, const ip_addr_t *ipaddr, void *arg) {
ip_addr_t addr;
if (ipaddr != NULL) addr = *ipaddr;
else addr = ip_addr_any;
lnet_userdata *ud = (lnet_userdata*)arg;
if (!ud) return;
post_net_dns (ud, name, &addr);
}
static bool post_net_recv (lnet_userdata *ud)
{
lnet_event *ev = (lnet_event *)malloc (sizeof (lnet_event));
if (!ev)
return false;
ev->event = RECVDATA;
ev->ud = ud;
if (!task_post_high (net_event, (task_param_t)ev))
{
free (ev);
return false;
}
return true;
}
static bool post_net_sent (lnet_userdata *ud) {
lnet_event *ev = (lnet_event *)malloc (sizeof (lnet_event));
if (!ev)
return false;
ev->event = SENTDATA;
ev->ud = ud;
if (!task_post_medium (net_event, (task_param_t)ev)) {
free (ev);
return false;
}
return true;
}
static bool post_net_accept (lnet_userdata *ud) {
lnet_event *ev = (lnet_event *)malloc (sizeof (lnet_event));
if (!ev)
return false;
ev->event = ACCEPT;
ev->ud = ud;
if (!task_post_medium (net_event, (task_param_t)ev)) {
free (ev);
return false;
}
return true;
}
static void lnet_netconn_callback(struct netconn *netconn, enum netconn_evt evt, u16_t len)
{
if (!netconn) return;
SYS_ARCH_DECL_PROTECT(lev);
SYS_ARCH_PROTECT(lev);
if (netconn->socket < 0) {
if (evt == NETCONN_EVT_RCVPLUS && len > 0) {
// data received before userdata was set up, note receive event
netconn->socket--;
}
SYS_ARCH_UNPROTECT(lev);
return;
}
SYS_ARCH_UNPROTECT(lev);
lnet_userdata *ud = (lnet_userdata *)netconn->socket;
if (!ud || !ud->netconn) return;
// if a previous event or the user triggered to close the connection then
// skip further event processing, we might run the cbs in Lua task on outdated userdata
if (ud->closing) return;
if (ud->type == TYPE_TCP_CLIENT || ud->type == TYPE_UDP_SOCKET) {
switch (evt) {
case NETCONN_EVT_SENDPLUS:
if (ud->type == TYPE_TCP_CLIENT && ud->client.connecting) {
// connection established, trigger Lua callback
ud->client.connecting = false;
post_net_connected(ud);
} else if (len > 0) {
// we're potentially called back from netconn several times for a single send job
// keep track of them in num_send and postpone the Lua callback until all data is sent
ud->client.num_send -= len;
if (ud->client.num_send == 0) {
// all data sent, trigger Lua callback
post_net_sent(ud);
}
}
break;
case NETCONN_EVT_ERROR:
post_net_err(ud, netconn_err(ud->netconn));
ud->closing = true;
break;
case NETCONN_EVT_RCVPLUS:
if (len > 0) {
// data received, collect it in Lua callback
post_net_recv(ud);
} else {
// signals closed connection from peer
post_net_err(ud, 0);
ud->closing = true;
}
break;
default:
break;
}
} else if (ud->type == TYPE_TCP_SERVER) {
switch (evt) {
case NETCONN_EVT_RCVPLUS:
// new connection available from netconn_listen()
if (ud->netconn &&
ud->server.cb_accept_ref != LUA_NOREF) {
post_net_accept(ud);
}
break;
case NETCONN_EVT_ERROR:
post_net_err(ud, netconn_err(ud->netconn));
ud->closing = true;
break;
default:
break;
}
}
}
// workaround for https://github.com/espressif/esp-idf/issues/784
#include "lwip/priv/api_msg.h"
#define NETCONN_DELETE(conn) \
if (netconn_delete(conn) == ERR_OK) netconn_free(conn);
#define NETCONN_CLOSE(conn) netconn_close_wa(conn)
static err_t netconn_close_wa(struct netconn *conn) {
err_t err = netconn_close(conn);
if (err == ERR_OK) {
netconn_delete(conn);
netconn_free(conn);
}
return err;
}
// --- Lua API - create
extern int tls_socket_create( lua_State *L );
// Lua: net.createUDPSocket()
int net_createUDPSocket( lua_State *L ) {
net_create(L, TYPE_UDP_SOCKET);
return 1;
}
// Lua: net.createServer(type, timeout)
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)
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) {
#ifdef CLIENT_SSL_ENABLE
return tls_socket_create( L );
#else
return luaL_error(L, "secure connections not enabled");
#endif
}
net_create(L, TYPE_TCP_CLIENT);
return 1;
}
// --- Get & check userdata
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)
// --- Lua API
// Lua: server:listen(port, addr, function(c)), socket:listen(port, addr)
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_islightfunction(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");
ud->netconn->socket = (int)ud;
netconn_set_nonblocking(ud->netconn, 1);
netconn_set_noautorecved(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");
ud->netconn->socket = (int)ud;
netconn_set_nonblocking(ud->netconn, 1);
netconn_set_noautorecved(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(ud->netconn) == ERR_OK)
ud->netconn = NULL;
break;
case TYPE_UDP_SOCKET:
if (NETCONN_CLOSE(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)
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");
ud->netconn->socket = (int)ud;
netconn_set_nonblocking(ud->netconn, 1);
netconn_set_noautorecved(ud->netconn, 1);
ud->port = port;
ip_addr_t addr;
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);
}
err_t err = dns_gethostbyname(domain, &addr, net_dns_cb, ud);
if (err == ERR_OK) {
net_dns_cb(domain, &addr, ud);
} else if (err != ERR_INPROGRESS) {
ud->client.wait_dns --;
if (unref) {
luaL_unref(L, LUA_REGISTRYINDEX, ud->self_ref);
ud->self_ref = LUA_NOREF;
}
ud->closing = true;
if (NETCONN_CLOSE(ud->netconn) == ERR_OK)
ud->netconn = NULL;
return lwip_lua_checkerr(L, err);
}
return 0;
}
// Lua: client/socket:on(name, callback)
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; }
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_islightfunction(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))
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_islightfunction(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");
ud->netconn->socket = (int)ud;
err_t err = netconn_bind(ud->netconn, IP_ADDR_ANY, 0);
if (err != ERR_OK) {
ud->closing = true;
if (NETCONN_CLOSE(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:hold()
int net_hold( 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->client.hold && ud->netconn)
{
if (ud->client.hold == 0)
{
ud->client.hold = 1;
ud->client.num_held = 0;
}
}
return 0;
}
// Lua: client:unhold()
int net_unhold( 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->client.hold && ud->netconn)
{
if (ud->client.hold != 0)
{
ud->client.hold = 0;
netconn_recved(ud->netconn, ud->client.num_held);
ud->client.num_held = 0;
}
}
return 0;
}
// Lua: client/socket:dns(domain, callback(socket, addr))
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) || lua_islightfunction(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");
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);
}
ip_addr_t addr;
err_t err = dns_gethostbyname(domain, &addr, net_dns_cb, ud);
if (err == ERR_OK) {
net_dns_cb(domain, &addr, ud);
} else if (err != ERR_INPROGRESS) {
ud->client.wait_dns --;
if (unref) {
luaL_unref(L, LUA_REGISTRYINDEX, ud->self_ref);
ud->self_ref = LUA_NOREF;
}
return lwip_lua_checkerr(L, err);
}
return 0;
}
// Lua: client:getpeer()
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()
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()
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(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);
}
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;
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;
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
static void net_dns_static_cb(const char *name, const ip_addr_t *ipaddr, void *callback_arg) {
lnet_event *ev = (lnet_event *)callback_arg;
ev->resolved_ip = ipaddr ? *ipaddr : ip_addr_any;
if (!task_post_medium (net_event, (task_param_t)ev))
free (ev);
}
// 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, "wrong domain");
}
// Note: this will be free'd using regular free(), so can't luaM_malloc()
lnet_event *ev = (lnet_event *)malloc (sizeof (lnet_event));
if (!ev)
return luaL_error (L, "out of memory");
ev->event = DNSSTATIC;
luaL_checkanyfunction(L, 2);
lua_pushvalue(L, 2); // copy argument (func) to the top of stack
ev->cb_ref = luaL_ref(L, LUA_REGISTRYINDEX);
err_t err = dns_gethostbyname(
domain, &ev->resolved_ip, net_dns_static_cb, ev);
if (err == ERR_OK) {
net_dns_static_cb(domain, &ev->resolved_ip, ev);
return 0;
} else if (err == ERR_INPROGRESS) {
return 0;
} else {
int e = lwip_lua_checkerr(L, err);
free(ev);
return e;
}
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
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);
}
lua_call(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);
}
lua_call(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);
lua_call(L, 1, 0);
}
}
static void laccept_cb (lua_State *L, lnet_userdata *ud) {
if (!ud || !ud->netconn) return;
SYS_ARCH_DECL_PROTECT(lev);
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);
int recvevent = 0;
struct netconn *newconn;
err_t err = netconn_accept(ud->netconn, &newconn);
if (err == ERR_OK) {
nud->netconn = newconn;
SYS_ARCH_PROTECT(lev);
// take buffered receive events
recvevent = (int)(-1 - newconn->socket);
nud->netconn->socket = (int)nud;
SYS_ARCH_UNPROTECT(lev);
netconn_set_nonblocking(nud->netconn, 1);
netconn_set_noautorecved(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");
lua_call(L, 1, 0);
while (recvevent-- > 0) {
// kick receive callback in case of pending events
post_net_recv(nud);
}
}
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) {
lwip_lua_checkerr(L, err);
return;
}
if (p) {
netbuf_data(p, (void **)&payload, &len);
} else {
len = 0;
}
if (len > 0 && 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);
}
lua_call(L, num_args, 0);
}
if (p) {
netbuf_delete(p);
if (ud->type == TYPE_TCP_CLIENT) {
if (ud->client.hold) {
ud->client.num_held += len;
} else {
netconn_recved(ud->netconn, len);
}
}
}
}
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);
lua_call(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);
lua_call(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);
}
}
static void handle_net_event (task_param_t param, task_prio_t prio)
{
lnet_event *ev = (lnet_event *)param;
(void)prio;
lua_State *L = lua_getstate();
switch (ev->event)
{
case DNSFOUND: ldnsfound_cb (L, ev->ud, &ev->resolved_ip); break;
case DNSSTATIC: ldnsstatic_cb (L, ev->cb_ref, &ev->resolved_ip); break;
case CONNECTED: lconnected_cb (L, ev->ud); break;
case ACCEPT: laccept_cb (L, ev->ud); break;
case RECVDATA: lrecv_cb (L, ev->ud); break;
case SENTDATA: lsent_cb (L, ev->ud); break;
case ERR: lerr_cb (L, ev->ud, ev->err); break;
}
free (ev);
}
// --- Tables
extern const LUA_REG_TYPE tls_cert_map[];
// Module function map
static const LUA_REG_TYPE net_tcpserver_map[] = {
{ LSTRKEY( "listen" ), LFUNCVAL( net_listen ) },
{ LSTRKEY( "getaddr" ), LFUNCVAL( net_getaddr ) },
{ LSTRKEY( "close" ), LFUNCVAL( net_close ) },
{ LSTRKEY( "__gc" ), LFUNCVAL( net_delete ) },
{ LSTRKEY( "__index" ), LROVAL( net_tcpserver_map ) },
{ LNILKEY, LNILVAL }
};
static const LUA_REG_TYPE net_tcpsocket_map[] = {
{ LSTRKEY( "connect" ), LFUNCVAL( net_connect ) },
{ LSTRKEY( "close" ), LFUNCVAL( net_close ) },
{ LSTRKEY( "on" ), LFUNCVAL( net_on ) },
{ LSTRKEY( "send" ), LFUNCVAL( net_send ) },
{ LSTRKEY( "hold" ), LFUNCVAL( net_hold ) },
{ LSTRKEY( "unhold" ), LFUNCVAL( net_unhold ) },
{ LSTRKEY( "dns" ), LFUNCVAL( net_dns ) },
{ LSTRKEY( "getpeer" ), LFUNCVAL( net_getpeer ) },
{ LSTRKEY( "getaddr" ), LFUNCVAL( net_getaddr ) },
{ LSTRKEY( "__gc" ), LFUNCVAL( net_delete ) },
{ LSTRKEY( "__index" ), LROVAL( net_tcpsocket_map ) },
{ LNILKEY, LNILVAL }
};
static const LUA_REG_TYPE net_udpsocket_map[] = {
{ LSTRKEY( "listen" ), LFUNCVAL( net_listen ) },
{ LSTRKEY( "close" ), LFUNCVAL( net_close ) },
{ LSTRKEY( "on" ), LFUNCVAL( net_on ) },
{ LSTRKEY( "send" ), LFUNCVAL( net_send ) },
{ LSTRKEY( "dns" ), LFUNCVAL( net_dns ) },
{ LSTRKEY( "getaddr" ), LFUNCVAL( net_getaddr ) },
{ LSTRKEY( "__gc" ), LFUNCVAL( net_delete ) },
{ LSTRKEY( "__index" ), LROVAL( net_udpsocket_map ) },
{ LNILKEY, LNILVAL }
};
static const LUA_REG_TYPE net_dns_map[] = {
{ LSTRKEY( "setdnsserver" ), LFUNCVAL( net_setdnsserver ) },
{ LSTRKEY( "getdnsserver" ), LFUNCVAL( net_getdnsserver ) },
{ LSTRKEY( "resolve" ), LFUNCVAL( net_dns_static ) },
{ LNILKEY, LNILVAL }
};
static const LUA_REG_TYPE net_map[] = {
{ LSTRKEY( "createServer" ), LFUNCVAL( net_createServer ) },
{ LSTRKEY( "createConnection" ), LFUNCVAL( net_createConnection ) },
{ LSTRKEY( "createUDPSocket" ), LFUNCVAL( net_createUDPSocket ) },
{ LSTRKEY( "multicastJoin"), LFUNCVAL( net_multicastJoin ) },
{ LSTRKEY( "multicastLeave"), LFUNCVAL( net_multicastLeave ) },
{ LSTRKEY( "dns" ), LROVAL( net_dns_map ) },
#ifdef CLIENT_SSL_ENABLE
{ LSTRKEY( "cert" ), LROVAL( tls_cert_map ) },
#endif
{ LSTRKEY( "TCP" ), LNUMVAL( TYPE_TCP ) },
{ LSTRKEY( "UDP" ), LNUMVAL( TYPE_UDP ) },
{ LSTRKEY( "__metatable" ), LROVAL( net_map ) },
{ LNILKEY, LNILVAL }
};
int luaopen_net( lua_State *L ) {
igmp_init();
luaL_rometatable(L, NET_TABLE_TCP_SERVER, (void *)net_tcpserver_map);
luaL_rometatable(L, NET_TABLE_TCP_CLIENT, (void *)net_tcpsocket_map);
luaL_rometatable(L, NET_TABLE_UDP_SOCKET, (void *)net_udpsocket_map);
net_event = task_get_id (handle_net_event);
return 0;
}
NODEMCU_MODULE(NET, "net", net_map, luaopen_net);
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