mirror of https://github.com/arendst/Tasmota.git
281 lines
8.4 KiB
C++
281 lines
8.4 KiB
C++
/*
|
|
xdrv_41_tcp_bridge.ino - TCP to serial bridge
|
|
|
|
Copyright (C) 2021 Theo Arends and Stephan Hadinger
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifdef USE_TCP_BRIDGE
|
|
|
|
#define XDRV_41 41
|
|
|
|
#ifndef TCP_BRIDGE_CONNECTIONS
|
|
#define TCP_BRIDGE_CONNECTIONS 2 // number of maximum parallel connections
|
|
#endif
|
|
|
|
#ifndef TCP_BRIDGE_BUF_SIZE
|
|
#define TCP_BRIDGE_BUF_SIZE 255 // size of the buffer, above 132 required for efficient XMODEM
|
|
#endif
|
|
|
|
//const uint16_t tcp_port = 8880;
|
|
WiFiServer *server_tcp = nullptr;
|
|
//WiFiClient client_tcp1, client_tcp2;
|
|
WiFiClient client_tcp[TCP_BRIDGE_CONNECTIONS];
|
|
uint8_t client_next = 0;
|
|
uint8_t *tcp_buf = nullptr; // data transfer buffer
|
|
IPAddress ip_filter;
|
|
|
|
#include <TasmotaSerial.h>
|
|
TasmotaSerial *TCPSerial = nullptr;
|
|
|
|
const char kTCPCommands[] PROGMEM = "TCP" "|" // prefix
|
|
"Start" "|" "Baudrate" "|" "Config" "|" "Connect"
|
|
;
|
|
|
|
void (* const TCPCommand[])(void) PROGMEM = {
|
|
&CmndTCPStart, &CmndTCPBaudrate, &CmndTCPConfig, &CmndTCPConnect
|
|
};
|
|
|
|
//
|
|
// Called at event loop, checks for incoming data from the CC2530
|
|
//
|
|
void TCPLoop(void)
|
|
{
|
|
uint8_t c;
|
|
bool busy; // did we transfer some data?
|
|
int32_t buf_len;
|
|
|
|
if (!TCPSerial) return;
|
|
|
|
// check for a new client connection
|
|
if ((server_tcp) && (server_tcp->hasClient())) {
|
|
WiFiClient new_client = server_tcp->available();
|
|
|
|
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_TCP "Got connection from %s"), new_client.remoteIP().toString().c_str());
|
|
// Check for IP filtering if it's enabled.
|
|
if (ip_filter) {
|
|
if (ip_filter != new_client.remoteIP()) {
|
|
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_TCP "Rejected due to filtering"));
|
|
new_client.stop();
|
|
} else {
|
|
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_TCP "Allowed through filter"));
|
|
}
|
|
}
|
|
|
|
// find an empty slot
|
|
uint32_t i;
|
|
for (i=0; i<nitems(client_tcp); i++) {
|
|
WiFiClient &client = client_tcp[i];
|
|
if (!client) {
|
|
client = new_client;
|
|
break;
|
|
}
|
|
}
|
|
if (i >= nitems(client_tcp)) {
|
|
i = client_next++ % nitems(client_tcp);
|
|
WiFiClient &client = client_tcp[i];
|
|
client.stop();
|
|
client = new_client;
|
|
}
|
|
}
|
|
|
|
do {
|
|
busy = false; // exit loop if no data was transferred
|
|
|
|
// start reading the UART, this buffer can quickly overflow
|
|
buf_len = 0;
|
|
while ((buf_len < TCP_BRIDGE_BUF_SIZE) && (TCPSerial->available())) {
|
|
c = TCPSerial->read();
|
|
if (c >= 0) {
|
|
tcp_buf[buf_len++] = c;
|
|
busy = true;
|
|
}
|
|
}
|
|
if (buf_len > 0) {
|
|
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_TCP "from MCU: %*_H"), buf_len, tcp_buf);
|
|
|
|
for (uint32_t i=0; i<nitems(client_tcp); i++) {
|
|
WiFiClient &client = client_tcp[i];
|
|
if (client) { client.write(tcp_buf, buf_len); }
|
|
}
|
|
}
|
|
|
|
// handle data received from TCP
|
|
for (uint32_t i=0; i<nitems(client_tcp); i++) {
|
|
WiFiClient &client = client_tcp[i];
|
|
buf_len = 0;
|
|
while (client && (buf_len < TCP_BRIDGE_BUF_SIZE) && (client.available())) {
|
|
c = client.read();
|
|
if (c >= 0) {
|
|
tcp_buf[buf_len++] = c;
|
|
busy = true;
|
|
}
|
|
}
|
|
if (buf_len > 0) {
|
|
AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_TCP "to MCU/%d: %*_H"), i+1, buf_len, tcp_buf);
|
|
TCPSerial->write(tcp_buf, buf_len);
|
|
}
|
|
}
|
|
|
|
yield(); // avoid WDT if heavy traffic
|
|
} while (busy);
|
|
}
|
|
|
|
/********************************************************************************************/
|
|
|
|
void TCPInit(void) {
|
|
if (PinUsed(GPIO_TCP_RX) && PinUsed(GPIO_TCP_TX)) {
|
|
if (0 == (0x80 & Settings->tcp_config)) // !0x80 means unitialized
|
|
Settings->tcp_config = 0x80 | ParseSerialConfig("8N1"); // default as 8N1 for backward compatibility
|
|
tcp_buf = (uint8_t*) malloc(TCP_BRIDGE_BUF_SIZE);
|
|
if (!tcp_buf) { AddLog(LOG_LEVEL_ERROR, PSTR(D_LOG_TCP "could not allocate buffer")); return; }
|
|
|
|
if (!Settings->tcp_baudrate) { Settings->tcp_baudrate = 115200 / 1200; }
|
|
TCPSerial = new TasmotaSerial(Pin(GPIO_TCP_RX), Pin(GPIO_TCP_TX), TasmotaGlobal.seriallog_level ? 1 : 2, 0, TCP_BRIDGE_BUF_SIZE); // set a receive buffer of 256 bytes
|
|
TCPSerial->begin(Settings->tcp_baudrate * 1200, ConvertSerialConfig(0x7F & Settings->tcp_config));
|
|
if (TCPSerial->hardwareSerial()) {
|
|
ClaimSerial();
|
|
}
|
|
}
|
|
}
|
|
|
|
/*********************************************************************************************\
|
|
* Commands
|
|
\*********************************************************************************************/
|
|
|
|
//
|
|
// Command `TCPStart`
|
|
// Params: port,<IPv4 allow>
|
|
//
|
|
void CmndTCPStart(void) {
|
|
|
|
if (!TCPSerial) { return; }
|
|
|
|
int32_t tcp_port = XdrvMailbox.payload;
|
|
if (ArgC() == 2) {
|
|
char sub_string[XdrvMailbox.data_len];
|
|
ip_filter.fromString(ArgV(sub_string, 2));
|
|
} else {
|
|
// Disable whitelist if previously set
|
|
ip_filter = (uint32_t)0;
|
|
}
|
|
|
|
if (server_tcp) {
|
|
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_TCP "Stopping TCP server"));
|
|
server_tcp->stop();
|
|
delete server_tcp;
|
|
server_tcp = nullptr;
|
|
|
|
for (uint32_t i=0; i<nitems(client_tcp); i++) {
|
|
WiFiClient &client = client_tcp[i];
|
|
client.stop();
|
|
}
|
|
}
|
|
if (tcp_port > 0) {
|
|
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_TCP "Starting TCP server on port %d"), tcp_port);
|
|
if (ip_filter) {
|
|
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_TCP "Filtering %s"), ip_filter.toString().c_str());
|
|
}
|
|
server_tcp = new WiFiServer(tcp_port);
|
|
server_tcp->begin(); // start TCP server
|
|
server_tcp->setNoDelay(true);
|
|
}
|
|
|
|
ResponseCmndDone();
|
|
}
|
|
|
|
void CmndTCPBaudrate(void) {
|
|
if ((XdrvMailbox.payload >= 1200) && (XdrvMailbox.payload <= 115200)) {
|
|
XdrvMailbox.payload /= 1200; // Make it a valid baudrate
|
|
Settings->tcp_baudrate = XdrvMailbox.payload;
|
|
TCPSerial->begin(Settings->tcp_baudrate * 1200, ConvertSerialConfig(0x7F & Settings->tcp_config)); // Reinitialize serial port with new baud rate
|
|
}
|
|
ResponseCmndNumber(Settings->tcp_baudrate * 1200);
|
|
}
|
|
|
|
void CmndTCPConfig(void) {
|
|
if (XdrvMailbox.data_len > 0) {
|
|
uint8_t serial_config = ParseSerialConfig(XdrvMailbox.data);
|
|
if (serial_config >= 0) {
|
|
Settings->tcp_config = 0x80 | serial_config; // default 0x00 should be 8N1
|
|
TCPSerial->begin(Settings->tcp_baudrate * 1200, ConvertSerialConfig(0x7F & Settings->tcp_config)); // Reinitialize serial port with new config
|
|
}
|
|
}
|
|
ResponseCmndChar_P(GetSerialConfig(0x7F & Settings->tcp_config).c_str());
|
|
}
|
|
|
|
//
|
|
// Command `Connect`
|
|
// Params: port,<IPv4>
|
|
//
|
|
void CmndTCPConnect(void) {
|
|
int32_t tcp_port = XdrvMailbox.payload;
|
|
|
|
if (ArgC() == 2) {
|
|
char sub_string[XdrvMailbox.data_len];
|
|
WiFiClient new_client;
|
|
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_TCP "Connecting to %s on port %d"), ArgV(sub_string, 2),tcp_port);
|
|
if (new_client.connect(ArgV(sub_string, 2),tcp_port)) {
|
|
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_TCP "connected!"));
|
|
} else {
|
|
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_TCP "error connecting!"));
|
|
}
|
|
|
|
// find an empty slot
|
|
uint32_t i;
|
|
for (i=0; i<nitems(client_tcp); i++) {
|
|
WiFiClient &client = client_tcp[i];
|
|
if (!client) {
|
|
client = new_client;
|
|
break;
|
|
}
|
|
}
|
|
if (i >= nitems(client_tcp)) {
|
|
i = client_next++ % nitems(client_tcp);
|
|
WiFiClient &client = client_tcp[i];
|
|
client.stop();
|
|
client = new_client;
|
|
}
|
|
} else {
|
|
AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_TCP "Usage: port,ip_address"));
|
|
}
|
|
|
|
ResponseCmndDone();
|
|
}
|
|
|
|
/*********************************************************************************************\
|
|
* Interface
|
|
\*********************************************************************************************/
|
|
|
|
bool Xdrv41(uint8_t function)
|
|
{
|
|
bool result = false;
|
|
|
|
switch (function) {
|
|
case FUNC_LOOP:
|
|
TCPLoop();
|
|
break;
|
|
case FUNC_PRE_INIT:
|
|
TCPInit();
|
|
break;
|
|
case FUNC_COMMAND:
|
|
result = DecodeCommand(kTCPCommands, TCPCommand);
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
#endif // USE_TCP_BRIDGE
|