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100 lines
3.5 KiB
100 lines
3.5 KiB
/*
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* Copyright (C) 2021-2022 by Geoffrey Merck F4FXL / KC3FRA
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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "APRSParser.h"
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#include "Log.h"
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bool CAPRSParser::parseFrame(const std::string& frameStr, CAPRSFrame& frame)
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{
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return parseFrame(frameStr, frame, false);
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}
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bool CAPRSParser::parseFrame(const std::string& frameStr, CAPRSFrame& frame, bool doNotEnforceFrameType)
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{
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frame.clear();
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bool ret = doNotEnforceFrameType;
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if(!frameStr.empty()) {
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auto pos = frameStr.find_first_of(':');
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if(pos != std::string::npos && pos != frameStr.length() - 1) {
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auto header = frameStr.substr(0, pos); // contains source, dest and path
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auto body = frameStr.substr(pos +1);
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std::vector<std::string> headerSplits;
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boost::split(headerSplits, header, [](char c) { return c == ',' || c == '>';});
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//we need at least source and dest to form a valid frame, also headers shall not contain empty strings
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if(headerSplits.size() >= 2 && std::none_of(headerSplits.begin(), headerSplits.end(), [](std::string s){ return s.empty(); })) {
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frame.getSource().assign(headerSplits[0]);
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frame.getDestination().assign(headerSplits[1]);
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for(unsigned int i = 2; i < headerSplits.size(); i++) {
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frame.getPath().push_back(headerSplits[i]);
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}
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frame.getBody().assign(body);
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if(!doNotEnforceFrameType) {
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setFrameType(frame);
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if(frame.getType() == APFT_UNKNOWN) {
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CLog::logInfo("Invalid or unsupported APRS frame : %s", frameStr);
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}
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else {
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ret = true;
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}
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}
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}
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}
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}
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return ret;
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}
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void CAPRSParser::setFrameType(CAPRSFrame& frame)
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{
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APRS_FRAME_TYPE type = APFT_UNKNOWN;
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std::string body(frame.getBody());
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if(!body.empty()) {
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switch (body[0])
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{
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case ':':
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if(body[10] == ':' && std::all_of(body.begin() + 1, body.begin() + 10,
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[](char c){ return c == ' ' || c == '-' || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9'); }))
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type = APFT_MESSAGE;
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break;
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// case '!':
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// if(body.length() >= 2U && body[1] == '!') {
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// // This is ultimeter 200 weather station
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// type = APFT_UNKNOWN;
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// break;
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// } else {
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// type = APFT_POSITION;
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// }
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// case '=':
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// case '/':
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// case '@':
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// break;
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default:
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break;
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}
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}
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frame.getType() = type;
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if(type == APFT_UNKNOWN)
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frame.clear();
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} |