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https://github.com/eddyem/eddys_snippets.git
synced 2025-12-06 02:35:12 +03:00
add simplest web interface
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96
modbus_relay/web_management/index.html
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96
modbus_relay/web_management/index.html
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@ -0,0 +1,96 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>Relay Control</title>
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<style>
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.container {
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display: flex;
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flex-direction: column;
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gap: 10px;
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width: 200px;
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margin: 20px;
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}
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button {
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padding: 10px;
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font-size: 16px;
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}
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.indicator {
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width: 100%;
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height: 30px;
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border: 1px solid black;
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border-radius: 5px;
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}
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.red {
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background-color: #ff9999;
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}
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.green {
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background-color: #99ff99;
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}
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</style>
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</head>
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<body>
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<div class="container">
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<button id="leftBtn" onclick="sendCommand('open')">Open</button>
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<button id="rightBtn" onclick="sendCommand('close')">Close</button>
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<button onclick="sendCommand('stop')">Stop</button>
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<div class="indicator red" id="leftInd">Left</div>
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<div class="indicator red" id="rightInd">Right</div>
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</div>
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<script>
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async function updateStatus() {
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try {
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const response = await fetch('http://ishtar.sao.ru:9000/status', {
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method: 'POST',
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body: 'status\n'
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});
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const text = await response.text();
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const status = parseStatus(text);
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// Update buttons
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document.getElementById('leftBtn').disabled = status.relay0 === '1';
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document.getElementById('rightBtn').disabled = status.relay1 === '1';
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// Update indicators
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document.getElementById('leftInd').className =
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`indicator ${status.in0 === '1' ? 'green' : 'red'}`;
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document.getElementById('rightInd').className =
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`indicator ${status.in1 === '1' ? 'green' : 'red'}`;
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} catch (error) {
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console.error('Status update failed:', error);
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}
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}
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function parseStatus(text) {
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const lines = text.split('\n');
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const status = {};
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lines.forEach(line => {
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const [key, value] = line.split('=');
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if (key && value !== undefined) {
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status[key] = value.replace('\n', '').trim();
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}
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});
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return status;
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}
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async function sendCommand(cmd) {
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try {
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await fetch(`http://ishtar.sao.ru:9000/${cmd}`, {
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method: 'POST',
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body: cmd
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});
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// Update status immediately after command
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await updateStatus();
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} catch (error) {
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console.error('Command failed:', error);
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}
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}
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// Update status every second
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setInterval(updateStatus, 3000);
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// Initial status update
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updateStatus();
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</script>
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</body>
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</html>
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59
modbus_relay/web_management/relay_daemon/Makefile
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59
modbus_relay/web_management/relay_daemon/Makefile
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# run `make DEF=...` to add extra defines
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PROGRAM := modbus_relay
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LDFLAGS := -fdata-sections -ffunction-sections -Wl,--gc-sections -Wl,--discard-all
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LDFLAGS += -lusefull_macros -lmodbus
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SRCS := $(wildcard *.c)
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DEFINES := $(DEF) -D_GNU_SOURCE -D_XOPEN_SOURCE=1111
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OBJDIR := mk
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CFLAGS += -O2 -Wall -Wextra -Wno-trampolines
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OBJS := $(addprefix $(OBJDIR)/, $(SRCS:%.c=%.o))
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DEPS := $(OBJS:.o=.d)
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TARGFILE := $(OBJDIR)/TARGET
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CC = gcc
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#TARGET := RELEASE
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ifeq ($(shell test -e $(TARGFILE) && echo -n yes),yes)
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TARGET := $(file < $(TARGFILE))
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else
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TARGET := RELEASE
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endif
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ifeq ($(TARGET), DEBUG)
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.DEFAULT_GOAL := debug
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endif
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release: CFLAGS += -flto
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release: LDFLAGS += -flto
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release: $(PROGRAM)
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debug: CFLAGS += -DEBUG -Werror
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debug: TARGET := DEBUG
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debug: $(PROGRAM)
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$(TARGFILE): $(OBJDIR)
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@echo -e "\t\tTARGET: $(TARGET)"
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@echo "$(TARGET)" > $(TARGFILE)
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$(PROGRAM) : $(TARGFILE) $(OBJS)
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@echo -e "\t\tLD $(PROGRAM)"
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$(CC) $(LDFLAGS) $(OBJS) -o $(PROGRAM)
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$(OBJDIR):
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@mkdir $(OBJDIR)
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ifneq ($(MAKECMDGOALS),clean)
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-include $(DEPS)
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endif
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$(OBJDIR)/%.o: %.c
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@echo -e "\t\tCC $<"
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$(CC) -MD -c $(LDFLAGS) $(CFLAGS) $(DEFINES) -o $@ $<
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clean:
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@echo -e "\t\tCLEAN"
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@rm -rf $(OBJDIR) 2>/dev/null || true
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xclean: clean
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@rm -f $(PROGRAM)
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.PHONY: clean xclean
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83
modbus_relay/web_management/relay_daemon/cmdlnopts.c
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83
modbus_relay/web_management/relay_daemon/cmdlnopts.c
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/* geany_encoding=koi8-r
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* cmdlnopts.c - the only function that parse cmdln args and returns glob parameters
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*
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* Copyright 2013 Edward V. Emelianoff <eddy@sao.ru>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include <assert.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#include <strings.h>
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#include "cmdlnopts.h"
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#include "usefull_macros.h"
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/*
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* here are global parameters initialisation
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*/
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static int help;
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sl_loglevel_e verblvl = LOGLEVEL_WARN;
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glob_pars GP = {
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.baudrate = 9600,
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.device = "/dev/ttyUSB0",
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.nodenum = 1,
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.port = "9000",
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};
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/*
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* Define command line options by filling structure:
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* name has_arg flag val type argptr help
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*/
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static sl_option_t cmdlnopts[] = {
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{"help", NO_ARGS, NULL, 'h', arg_int, APTR(&help), "show this help"},
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{"verbose", NO_ARGS, NULL, 'v', arg_none, APTR(&GP.verbose), "verbose level for (each `-v` increase it)"},
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{"logfile", NEED_ARG, NULL, 'l', arg_string, APTR(&GP.logfile), "logging file name"},
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{"baudrate",NEED_ARG, NULL, 'b', arg_int, APTR(&GP.baudrate), "interface baudrate (default: 9600)"},
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{"device", NEED_ARG, NULL, 'd', arg_string, APTR(&GP.device), "serial device path (default: /dev/ttyUSB0)"},
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{"node", NEED_ARG, NULL, 'n', arg_int, APTR(&GP.nodenum), "node number (default: 1)"},
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{"port", NEED_ARG, NULL, 'p', arg_string, APTR(&GP.port), "socket port (default: 9000)"},
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end_option
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};
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/**
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* Parse command line options and return dynamically allocated structure
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* to global parameters
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* @param argc - copy of argc from main
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* @param argv - copy of argv from main
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* @return allocated structure with global parameters
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*/
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void parse_args(int argc, char **argv){
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size_t hlen = 1024;
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char helpstring[1024], *hptr = helpstring;
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snprintf(hptr, hlen, "Usage: %%s [args]\n\n\tWhere args are:\n");
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// format of help: "Usage: progname [args]\n"
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sl_helpstring(helpstring);
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// parse arguments
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sl_parseargs(&argc, &argv, cmdlnopts);
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if(help) sl_showhelp(-1, cmdlnopts);
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if(argc > 0) WARNX("Omit %d unexpected arguments", argc);
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}
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void verbose(sl_loglevel_e lvl, const char *fmt, ...){
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if(lvl > verblvl) return;
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va_list ar;
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va_start(ar, fmt);
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vprintf(fmt, ar);
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va_end(ar);
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fflush(stdout);
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}
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42
modbus_relay/web_management/relay_daemon/cmdlnopts.h
Normal file
42
modbus_relay/web_management/relay_daemon/cmdlnopts.h
Normal file
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/*
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* This file is part of the modbus_relay project.
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* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <usefull_macros.h>
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/*
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* here are some typedef's for global data
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*/
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typedef struct{
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int verbose; // verbose level
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int baudrate; // interface baudrate (default: 9600)
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int nodenum; // node number (default: 1)
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char *port; // socket port (default: 9000)
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char *logfile; // logfile name
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char *device; // serial device path (default: /dev/ttyUSB0)
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} glob_pars;
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extern glob_pars GP;
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extern sl_loglevel_e verblvl;
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void parse_args(int argc, char **argv);
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void verbose(sl_loglevel_e lvl, const char *fmt, ...);
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#define VMSG(...) verbose(LOGLEVEL_MSG, __VA_ARGS__)
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#define VDBG(...) verbose(LOGLEVEL_DBG, __VA_ARGS__)
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#define VANY(...) verbose(LOGLEVEL_ANY, __VA_ARGS__)
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134
modbus_relay/web_management/relay_daemon/main.c
Normal file
134
modbus_relay/web_management/relay_daemon/main.c
Normal file
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/*
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* This file is part of the modbus_relay project.
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|
* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
|
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|
*
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|
* 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/>.
|
||||||
|
*/
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|
|
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#include <modbus/modbus.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/prctl.h>
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#include <sys/wait.h>
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|
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#include "cmdlnopts.h"
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#include "server.h"
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|
|
||||||
|
void signals(int sig){
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||||||
|
if(sig){
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signal(sig, SIG_IGN);
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DBG("Get signal %d, quit.\n", sig);
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LOGERR("Exit with status %d", sig);
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|
}else LOGERR("Exit");
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exit(sig);
|
||||||
|
}
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||||||
|
|
||||||
|
int main(int argc, char **argv){
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|
sl_init();
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|
parse_args(argc, argv);
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||||||
|
verblvl = GP.verbose + LOGLEVEL_WARN;
|
||||||
|
if(verblvl >= LOGLEVEL_AMOUNT) verblvl = LOGLEVEL_AMOUNT - 1;
|
||||||
|
if(GP.logfile) OPENLOG(GP.logfile, verblvl, 1);
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||||||
|
LOGMSG("Started");
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||||||
|
signal(SIGTERM, signals);
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||||||
|
signal(SIGINT, signals);
|
||||||
|
signal(SIGQUIT, signals);
|
||||||
|
signal(SIGTSTP, SIG_IGN);
|
||||||
|
signal(SIGHUP, signals);
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||||||
|
VMSG("Try to open %s @%d ... ", GP.device, GP.baudrate);
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||||||
|
modbus_t *ctx = modbus_new_rtu(GP.device, GP.baudrate, 'N', 8, 1);
|
||||||
|
modbus_set_response_timeout(ctx, 0, 100000);
|
||||||
|
if(modbus_set_slave(ctx, GP.nodenum)) ERRX("Can't set modbus slave");
|
||||||
|
if(modbus_connect(ctx) < 0) ERR("Can't open device %s", GP.device);
|
||||||
|
VMSG("OK!\n");
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||||||
|
#ifndef EBUG
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||||||
|
while(1){
|
||||||
|
pid_t childpid = fork();
|
||||||
|
if(childpid){ // master
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||||||
|
LOGMSG("Created child with pid %d", childpid);
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||||||
|
wait(NULL);
|
||||||
|
LOGWARN("Child %d died", childpid);
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||||||
|
sleep(5); // wait a little before respawn
|
||||||
|
}else{ // slave
|
||||||
|
prctl(PR_SET_PDEATHSIG, SIGTERM); // send SIGTERM to child when parent dies
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
runserver(GP.port, ctx);
|
||||||
|
#if 0
|
||||||
|
uint8_t dest8[8] = {0};
|
||||||
|
if(GP.setall){
|
||||||
|
memset(dest8, 1, 8);
|
||||||
|
if(modbus_write_bits(ctx, 0, 8, dest8) < 0) WARNX("Can't set all relays");
|
||||||
|
}else if(GP.resetall){
|
||||||
|
if(modbus_write_bits(ctx, 0, 8, dest8) < 0) WARNX("Can't clear all relays");
|
||||||
|
}else{
|
||||||
|
if(GP.resetrelay){
|
||||||
|
int **p = GP.resetrelay;
|
||||||
|
while(*p){
|
||||||
|
int n = **p;
|
||||||
|
if(n > 7 || n < 0) WARNX("Relay number should be in [0, 7]");
|
||||||
|
else{
|
||||||
|
if(modbus_write_bit(ctx, n, 0) < 0) WARNX("Can't reset relay #%d", n);
|
||||||
|
else VMSG("RELAY%d=0\n", n);
|
||||||
|
}
|
||||||
|
++p;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if(GP.setrelay){
|
||||||
|
int **p = GP.setrelay;
|
||||||
|
while(*p){
|
||||||
|
int n = **p;
|
||||||
|
if(n > 7 || n < 0) WARNX("Relay number should be in [0, 7]");
|
||||||
|
else{
|
||||||
|
if(modbus_write_bit(ctx, n, 1) < 0) WARNX("Can't set relay #%d", n);
|
||||||
|
else VMSG("RELAY%d=1\n", n);
|
||||||
|
}
|
||||||
|
++p;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if(GP.getinput){
|
||||||
|
if(modbus_read_input_bits(ctx, 0, 8, dest8) < 0) WARNX("Can't read inputs");
|
||||||
|
else{
|
||||||
|
int **p = GP.getinput;
|
||||||
|
while(*p){
|
||||||
|
int n = **p;
|
||||||
|
if(n > 7 || n < 0) WARNX("Input number should be in [0, 7]");
|
||||||
|
else printf("INPUT%d=%u\n", n, dest8[n]);
|
||||||
|
++p;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if(GP.getrelay){
|
||||||
|
if(modbus_read_bits(ctx, 0, 8, dest8) < 0) WARNX("Can't read relays");
|
||||||
|
else{
|
||||||
|
int **p = GP.getrelay;
|
||||||
|
while(*p){
|
||||||
|
int n = **p;
|
||||||
|
if(n > 7 || n < 0) WARNX("Relay number should be in [0, 7]");
|
||||||
|
else printf("RELAY%d=%u\n", n, dest8[n]);
|
||||||
|
++p;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
LOGMSG("End");
|
||||||
|
VMSG("End\n");
|
||||||
|
modbus_close(ctx);
|
||||||
|
modbus_free(ctx);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
BIN
modbus_relay/web_management/relay_daemon/modbus_relay
Executable file
BIN
modbus_relay/web_management/relay_daemon/modbus_relay
Executable file
Binary file not shown.
@ -0,0 +1 @@
|
|||||||
|
-std=c17
|
||||||
@ -0,0 +1,3 @@
|
|||||||
|
// Add predefined macros for your project here. For example:
|
||||||
|
// #define THE_ANSWER 42
|
||||||
|
#define _DEFAULT_SOURCE
|
||||||
@ -0,0 +1 @@
|
|||||||
|
[General]
|
||||||
@ -0,0 +1,184 @@
|
|||||||
|
<?xml version="1.0" encoding="UTF-8"?>
|
||||||
|
<!DOCTYPE QtCreatorProject>
|
||||||
|
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|
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|
||||||
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||||||
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||||||
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||||||
|
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||||||
|
<value type="bool" key="EditorConfiguration.cleanWhitespace">true</value>
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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|
||||||
|
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||||||
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|
||||||
|
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|
||||||
|
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|
||||||
|
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|
||||||
|
<data>
|
||||||
|
<variable>ProjectExplorer.Project.Updater.FileVersion</variable>
|
||||||
|
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|
||||||
|
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|
||||||
|
<data>
|
||||||
|
<variable>Version</variable>
|
||||||
|
<value type="int">22</value>
|
||||||
|
</data>
|
||||||
|
</qtcreator>
|
||||||
@ -0,0 +1 @@
|
|||||||
|
-std=c++17
|
||||||
@ -0,0 +1,5 @@
|
|||||||
|
cmdlnopts.c
|
||||||
|
cmdlnopts.h
|
||||||
|
main.c
|
||||||
|
server.c
|
||||||
|
server.h
|
||||||
354
modbus_relay/web_management/relay_daemon/server.c
Normal file
354
modbus_relay/web_management/relay_daemon/server.c
Normal file
@ -0,0 +1,354 @@
|
|||||||
|
/*
|
||||||
|
* This file is part of the modbus_relay project.
|
||||||
|
* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
|
||||||
|
*
|
||||||
|
* 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/>.
|
||||||
|
*/
|
||||||
|
|
||||||
|
|
||||||
|
#include <netdb.h> // addrinfo
|
||||||
|
#include <arpa/inet.h> // inet_ntop
|
||||||
|
#include <pthread.h>
|
||||||
|
#include <limits.h> // INT_xxx
|
||||||
|
#include <signal.h> // pthread_kill
|
||||||
|
#include <unistd.h> // daemon
|
||||||
|
#include <sys/select.h>
|
||||||
|
#include <sys/syscall.h> // syscall
|
||||||
|
#include <sys/stat.h>
|
||||||
|
#include <fcntl.h>
|
||||||
|
#include <usefull_macros.h>
|
||||||
|
#include <string.h>
|
||||||
|
#include <stdio.h>
|
||||||
|
|
||||||
|
#include "server.h"
|
||||||
|
|
||||||
|
#define BUFLEN (10240)
|
||||||
|
// Max amount of connections
|
||||||
|
#define BACKLOG (30)
|
||||||
|
|
||||||
|
// state of ins/outs
|
||||||
|
static int relay[2] = {0}, in[2] = {0};
|
||||||
|
static int relaycmd[2] = {-1, -1}; // user command: open/close
|
||||||
|
|
||||||
|
/**************** COMMON FUNCTIONS ****************/
|
||||||
|
/**
|
||||||
|
* wait for answer from socket
|
||||||
|
* @param sock - socket fd
|
||||||
|
* @return 0 in case of error or timeout, 1 in case of socket ready
|
||||||
|
*/
|
||||||
|
static int waittoread(int sock){
|
||||||
|
fd_set fds;
|
||||||
|
struct timeval timeout;
|
||||||
|
int rc;
|
||||||
|
timeout.tv_sec = 1; // wait not more than 1 second
|
||||||
|
timeout.tv_usec = 0;
|
||||||
|
FD_ZERO(&fds);
|
||||||
|
FD_SET(sock, &fds);
|
||||||
|
do{
|
||||||
|
rc = select(sock+1, &fds, NULL, NULL, &timeout);
|
||||||
|
if(rc < 0){
|
||||||
|
if(errno != EINTR){
|
||||||
|
WARN("select()");
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
}while(1);
|
||||||
|
if(FD_ISSET(sock, &fds)) return 1;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**************** SERVER FUNCTIONS ****************/
|
||||||
|
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
|
||||||
|
/**
|
||||||
|
* Send data over socket
|
||||||
|
* @param sock - socket fd
|
||||||
|
* @param webquery - ==1 if this is web query
|
||||||
|
* @param textbuf - zero-trailing buffer with data to send
|
||||||
|
* @return 1 if all OK
|
||||||
|
*/
|
||||||
|
static int send_data(int sock, int webquery, char *textbuf){
|
||||||
|
ssize_t L, Len;
|
||||||
|
char tbuf[BUFLEN];
|
||||||
|
Len = strlen(textbuf);
|
||||||
|
// OK buffer ready, prepare to send it
|
||||||
|
if(webquery){
|
||||||
|
L = snprintf((char*)tbuf, BUFLEN,
|
||||||
|
"HTTP/2.0 200 OK\r\n"
|
||||||
|
"Access-Control-Allow-Origin: *\r\n"
|
||||||
|
"Access-Control-Allow-Methods: GET, POST\r\n"
|
||||||
|
"Access-Control-Allow-Credentials: true\r\n"
|
||||||
|
"Content-type: text/plain\r\nContent-Length: %zd\r\n\r\n", Len);
|
||||||
|
if(L < 0){
|
||||||
|
WARN("sprintf()");
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
if(L != send(sock, tbuf, L, MSG_NOSIGNAL)){
|
||||||
|
WARN("write");
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
// send data
|
||||||
|
//DBG("send %zd bytes\nBUF: %s", Len, buf);
|
||||||
|
if(Len != write(sock, textbuf, Len)){
|
||||||
|
WARN("write()");
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
// search a first word after needle without spaces
|
||||||
|
static char* stringscan(char *str, char *needle){
|
||||||
|
char *a, *e;
|
||||||
|
char *end = str + strlen(str);
|
||||||
|
a = strstr(str, needle);
|
||||||
|
if(!a) return NULL;
|
||||||
|
a += strlen(needle);
|
||||||
|
while (a < end && (*a == ' ' || *a == '\r' || *a == '\t' || *a == '\r')) a++;
|
||||||
|
if(a >= end) return NULL;
|
||||||
|
e = strchr(a, ' ');
|
||||||
|
if(e) *e = 0;
|
||||||
|
return a;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void *handle_socket(void *asock){
|
||||||
|
//putlog("handle_socket(): getpid: %d, pthread_self: %lu, tid: %lu",getpid(), pthread_self(), syscall(SYS_gettid));
|
||||||
|
FNAME();
|
||||||
|
int sock = *((int*)asock);
|
||||||
|
int webquery = 0; // whether query is web or regular
|
||||||
|
char buff[BUFLEN];
|
||||||
|
ssize_t rd;
|
||||||
|
double t0 = sl_dtime();
|
||||||
|
while(sl_dtime() - t0 < SOCKET_TIMEOUT){
|
||||||
|
if(!waittoread(sock)){ // no data incoming
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
if(!(rd = read(sock, buff, BUFLEN-1))){
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
DBG("Got %zd bytes", rd);
|
||||||
|
if(rd < 0){ // error
|
||||||
|
DBG("Nothing to read from fd %d (ret: %zd)", sock, rd);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
t0 = sl_dtime();
|
||||||
|
// add trailing zero to be on the safe side
|
||||||
|
buff[rd] = 0;
|
||||||
|
// now we should check what do user want
|
||||||
|
char *got, *found = buff;
|
||||||
|
if((got = stringscan(buff, "GET")) || (got = stringscan(buff, "POST"))){ // web query
|
||||||
|
webquery = 1;
|
||||||
|
char *slash = strchr(got, '/');
|
||||||
|
if(slash) found = slash + 1;
|
||||||
|
// web query have format GET /some.resource
|
||||||
|
}
|
||||||
|
// here we can process user data
|
||||||
|
DBG("user send: %s\nfound=%s", buff, found);
|
||||||
|
pthread_mutex_lock(&mutex);
|
||||||
|
if(found){
|
||||||
|
int needstatus = 0;
|
||||||
|
if(0 == strcmp(found, "status")){
|
||||||
|
needstatus = 1;
|
||||||
|
}else if(0 == strcmp(found, "stop")){
|
||||||
|
needstatus = 1;
|
||||||
|
relaycmd[0] = 0; relaycmd[1] = 0;
|
||||||
|
}else if(0 == strcmp(found, "open")){
|
||||||
|
needstatus = 1;
|
||||||
|
relaycmd[0] = 1; relaycmd[1] = 0;
|
||||||
|
}else if(0 == strcmp(found, "close")){
|
||||||
|
needstatus = 1;
|
||||||
|
relaycmd[0] = 0; relaycmd[1] = 1;
|
||||||
|
}
|
||||||
|
if(needstatus){
|
||||||
|
DBG("User asks for status");
|
||||||
|
snprintf(buff, BUFLEN-1, "relay0=%d\nrelay1=%d\nin0=%d\nin1=%d\n",
|
||||||
|
relay[0], relay[1], in[0], in[1]);
|
||||||
|
send_data(sock, webquery, buff);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
pthread_mutex_unlock(&mutex);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
close(sock);
|
||||||
|
pthread_exit(NULL);
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
// main socket server
|
||||||
|
static void *server(void *asock){
|
||||||
|
LOGMSG("server(): getpid: %d, pthread_self: %lu, tid: %lu",getpid(), pthread_self(), syscall(SYS_gettid));
|
||||||
|
int sock = *((int*)asock);
|
||||||
|
if(listen(sock, BACKLOG) == -1){
|
||||||
|
LOGWARN("listen() failed");
|
||||||
|
WARN("listen");
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
while(1){
|
||||||
|
socklen_t size = sizeof(struct sockaddr_in);
|
||||||
|
struct sockaddr_in their_addr;
|
||||||
|
int newsock;
|
||||||
|
if(!waittoread(sock)) continue;
|
||||||
|
newsock = accept(sock, (struct sockaddr*)&their_addr, &size);
|
||||||
|
if(newsock <= 0){
|
||||||
|
LOGWARN("accept() failed");
|
||||||
|
WARN("accept()");
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
struct sockaddr_in* pV4Addr = (struct sockaddr_in*)&their_addr;
|
||||||
|
struct in_addr ipAddr = pV4Addr->sin_addr;
|
||||||
|
char str[INET_ADDRSTRLEN];
|
||||||
|
inet_ntop(AF_INET, &ipAddr, str, INET_ADDRSTRLEN);
|
||||||
|
//putlog("get connection from %s", str);
|
||||||
|
DBG("Got connection from %s\n", str);
|
||||||
|
pthread_t handler_thread;
|
||||||
|
if(pthread_create(&handler_thread, NULL, handle_socket, (void*) &newsock)){
|
||||||
|
LOGWARN("server(): pthread_create() failed");
|
||||||
|
WARN("pthread_create()");
|
||||||
|
}else{
|
||||||
|
DBG("Thread created, detouch");
|
||||||
|
pthread_detach(handler_thread); // don't care about thread state
|
||||||
|
}
|
||||||
|
}
|
||||||
|
LOGERR("server(): UNREACHABLE CODE REACHED!");
|
||||||
|
}
|
||||||
|
|
||||||
|
// data gathering & socket management
|
||||||
|
static void daemon_(int sock, modbus_t *ctx){
|
||||||
|
if(sock < 0 || !ctx) return;
|
||||||
|
pthread_t sock_thread;
|
||||||
|
if(pthread_create(&sock_thread, NULL, server, (void*) &sock)){
|
||||||
|
LOGERR("daemon_(): pthread_create() failed");
|
||||||
|
ERR("pthread_create()");
|
||||||
|
}
|
||||||
|
double tgot = sl_dtime(), lasttchanged = -1.;
|
||||||
|
do{
|
||||||
|
if(pthread_kill(sock_thread, 0) == ESRCH){ // died
|
||||||
|
WARNX("Sockets thread died");
|
||||||
|
LOGWARN("Sockets thread died");
|
||||||
|
pthread_join(sock_thread, NULL);
|
||||||
|
if(pthread_create(&sock_thread, NULL, server, (void*) &sock)){
|
||||||
|
LOGERR("daemon_(): new pthread_create() failed");
|
||||||
|
ERR("pthread_create()");
|
||||||
|
}
|
||||||
|
}
|
||||||
|
usleep(1000); // sleep a little or thread's won't be able to lock mutex
|
||||||
|
if(sl_dtime() - tgot < T_INTERVAL) continue;
|
||||||
|
DBG("tgot-time=%g", tgot - sl_dtime());
|
||||||
|
tgot = sl_dtime();
|
||||||
|
uint8_t dest8[8] = {0};
|
||||||
|
if(modbus_read_input_bits(ctx, 0, 8, dest8) < 0){
|
||||||
|
WARNX("Can't read inputs");
|
||||||
|
LOGWARN("Can't read inputs");
|
||||||
|
}else{
|
||||||
|
pthread_mutex_lock(&mutex);
|
||||||
|
in[0] = dest8[0]; in[1] = dest8[1];
|
||||||
|
DBG("ins: %d/%d", in[0], in[1]);
|
||||||
|
pthread_mutex_unlock(&mutex);
|
||||||
|
}
|
||||||
|
if(modbus_read_bits(ctx, 0, 8, dest8) < 0){
|
||||||
|
WARNX("Can't read relays");
|
||||||
|
LOGWARN("Can't read relays");
|
||||||
|
}else{
|
||||||
|
pthread_mutex_lock(&mutex);
|
||||||
|
relay[0] = dest8[0]; relay[1] = dest8[1];
|
||||||
|
DBG("outs: %d/%d", relay[0], relay[1]);
|
||||||
|
pthread_mutex_unlock(&mutex);
|
||||||
|
}
|
||||||
|
// check relay commands
|
||||||
|
pthread_mutex_lock(&mutex);
|
||||||
|
if(lasttchanged > -1. && (sl_dtime() - lasttchanged) > RELAYS_TIMEOUT &&
|
||||||
|
(relaycmd[0] == -1 && relaycmd[1] == -1)){
|
||||||
|
relaycmd[0] = 0; // turn off relays
|
||||||
|
relaycmd[1] = 0;
|
||||||
|
}
|
||||||
|
if(relaycmd[0] > -1 || relaycmd[1] > -1){
|
||||||
|
DBG("relaycmd: %d/%d", relaycmd[0], relaycmd[1]);
|
||||||
|
if(relaycmd[0] == 1 && relaycmd[1] == 1){ // wrong! Turn both off
|
||||||
|
relaycmd[0] = 0; relaycmd[1] = 0;
|
||||||
|
}
|
||||||
|
if(relaycmd[0] == 0 && relaycmd[1] == 0) lasttchanged = -1.;
|
||||||
|
// turn off
|
||||||
|
for(int i = 0; i < 2; ++i) if(relaycmd[i] == 0){
|
||||||
|
if(modbus_write_bit(ctx, i, 0) < 0){
|
||||||
|
WARNX("Can't reset relay #%d", i);
|
||||||
|
LOGWARN("Can't reset relay #%d", i);
|
||||||
|
}else{
|
||||||
|
relaycmd[i] = -1;
|
||||||
|
LOGMSG("RELAY%d=0\n", i);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
// turn on
|
||||||
|
for(int i = 0; i < 2; ++i) if(relaycmd[i] == 1){
|
||||||
|
if(modbus_write_bit(ctx, i, 1) < 0){
|
||||||
|
WARNX("Can't set relay #%d", i);
|
||||||
|
LOGWARN("Can't set relay #%d", i);
|
||||||
|
}else{
|
||||||
|
relaycmd[i] = -1;
|
||||||
|
LOGMSG("RELAY%d=1\n", i);
|
||||||
|
lasttchanged = sl_dtime();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
pthread_mutex_unlock(&mutex);
|
||||||
|
}while(1);
|
||||||
|
LOGERR("daemon_(): UNREACHABLE CODE REACHED!");
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Run daemon service
|
||||||
|
*/
|
||||||
|
void runserver(const char *port, modbus_t *ctx){
|
||||||
|
FNAME();
|
||||||
|
if(!port || !ctx) return;
|
||||||
|
int sock = -1;
|
||||||
|
struct addrinfo hints, *res, *p;
|
||||||
|
memset(&hints, 0, sizeof(hints));
|
||||||
|
hints.ai_family = AF_INET;
|
||||||
|
hints.ai_socktype = SOCK_STREAM;
|
||||||
|
hints.ai_flags = AI_PASSIVE;
|
||||||
|
if(getaddrinfo(NULL, port, &hints, &res) != 0){
|
||||||
|
ERR("getaddrinfo");
|
||||||
|
}
|
||||||
|
struct sockaddr_in *ia = (struct sockaddr_in*)res->ai_addr;
|
||||||
|
char str[INET_ADDRSTRLEN];
|
||||||
|
inet_ntop(AF_INET, &(ia->sin_addr), str, INET_ADDRSTRLEN);
|
||||||
|
// loop through all the results and bind to the first we can
|
||||||
|
for(p = res; p != NULL; p = p->ai_next){
|
||||||
|
if((sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1){
|
||||||
|
WARN("socket");
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
int reuseaddr = 1;
|
||||||
|
if(setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuseaddr, sizeof(int)) == -1){
|
||||||
|
ERR("setsockopt");
|
||||||
|
}
|
||||||
|
if(bind(sock, p->ai_addr, p->ai_addrlen) == -1){
|
||||||
|
close(sock);
|
||||||
|
WARN("bind");
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
break; // if we get here, we have a successfull connection
|
||||||
|
}
|
||||||
|
if(p == NULL){
|
||||||
|
LOGERR("failed to bind socket, exit");
|
||||||
|
// looped off the end of the list with no successful bind
|
||||||
|
ERRX("failed to bind socket");
|
||||||
|
}
|
||||||
|
freeaddrinfo(res);
|
||||||
|
daemon_(sock, ctx);
|
||||||
|
close(sock);
|
||||||
|
LOGERR("socket closed, exit");
|
||||||
|
signals(0);
|
||||||
|
}
|
||||||
29
modbus_relay/web_management/relay_daemon/server.h
Normal file
29
modbus_relay/web_management/relay_daemon/server.h
Normal file
@ -0,0 +1,29 @@
|
|||||||
|
/*
|
||||||
|
* This file is part of the modbus_relay project.
|
||||||
|
* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
|
||||||
|
*
|
||||||
|
* 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/>.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <modbus/modbus.h>
|
||||||
|
|
||||||
|
// timeout for socket closing if nothing received
|
||||||
|
#define SOCKET_TIMEOUT (60.0)
|
||||||
|
// timeout to turn relays off
|
||||||
|
#define RELAYS_TIMEOUT (10.0)
|
||||||
|
// time interval for MODBUS data polling (seconds)
|
||||||
|
#define T_INTERVAL (1.)
|
||||||
|
|
||||||
|
void runserver(const char *port, modbus_t *ctx);
|
||||||
|
int closeserver();
|
||||||
Loading…
x
Reference in New Issue
Block a user