Tom Early
7 years ago
parent
0ff3ea12d5
commit
e9645fad82
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/*
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* Copyright (C) 2010-2015 by Jonathan Naylor G4KLX
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* Copyright (C) 2018 by Thomas A. Early N7TAE
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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 <string>
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#include <cassert>
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#include <cstdio>
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#include <cctype>
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#include <cstring>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include "DPlusAuthenticator.h"
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//#include "DStarDefines.h"
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//#include "Utils.h"
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//#include "Defs.h"
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CDPlusAuthenticator::CDPlusAuthenticator(const std::string &loginCallsign, const std::string &address) :
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m_loginCallsign(loginCallsign),
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m_address(address)
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{
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assert(loginCallsign.size());
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Trim(m_loginCallsign);
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}
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CDPlusAuthenticator::~CDPlusAuthenticator()
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{
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}
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bool CDPlusAuthenticator::Process(std::map<std::string, std::string> &gwy_map, const bool reflectors, const bool repeaters)
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// return true if everything went okay
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{
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struct addrinfo hints, *infoptr;
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memset(&hints, 0, sizeof(struct addrinfo));
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hints.ai_family = AF_INET; // AF_INET means IPv4 only addresses
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hints.ai_socktype = SOCK_STREAM;
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int result = getaddrinfo(m_address.c_str(), NULL, &hints, &infoptr);
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if (result) {
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fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(result));
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return false;
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}
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struct addrinfo *p;
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char host[256];
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bool success = false;
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for (p = infoptr; p != NULL && !success; p = p->ai_next) {
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getnameinfo(p->ai_addr, p->ai_addrlen, host, sizeof(host), NULL, 0, NI_NUMERICHOST);
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printf("Trying %s from %s\n", host, m_address.c_str());
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success = authenticate(m_loginCallsign, std::string(host), gwy_map, reflectors, repeaters);
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}
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freeaddrinfo(infoptr);
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return success;
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}
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bool CDPlusAuthenticator::authenticate(const std::string &callsign, const std::string &hostname, std::map<std::string, std::string> &gwy_map, const bool reflectors, const bool repeaters)
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{
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CTCPReaderWriterClient socket(hostname, 20001U);
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bool ret = socket.open();
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if (!ret)
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return false;
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unsigned char* buffer = new unsigned char[4096U];
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::memset(buffer, ' ', 56U);
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buffer[0U] = 0x38U;
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buffer[1U] = 0xC0U;
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buffer[2U] = 0x01U;
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buffer[3U] = 0x00U;
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::memcpy(buffer+4, callsign.c_str(), callsign.size());
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::memcpy(buffer+12, "DV019999", 8);
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::memcpy(buffer+28, "W7IB2", 5);
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::memcpy(buffer+40, "DHS0257", 7);
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ret = socket.write(buffer, 56U);
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if (!ret) {
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socket.close();
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delete[] buffer;
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return false;
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}
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ret = read(socket, buffer, 2U);
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while (ret) {
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unsigned int len = (buffer[1U] & 0x0FU) * 256U + buffer[0U];
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// Ensure that we get exactly len - 2U bytes from the TCP stream
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ret = read(socket, buffer + 2U, len - 2U);
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if (!ret) {
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fprintf(stderr, "Short read from %s:20001", hostname.c_str());
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return false;
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}
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if ((buffer[1U] & 0xC0U) != 0xC0U || buffer[2U] != 0x01U) {
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fprintf(stderr, "Invalid packet received from %s:20001", hostname.c_str());
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return false;
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}
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for (unsigned int i = 8U; (i + 25U) < len; i += 26U) {
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std::string address((char *)(buffer + i));
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std::string name((char *)(buffer + i + 16U));
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Trim(address);
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Trim(name);
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// Get the active flag
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bool active = (buffer[i + 25U] & 0x80U) == 0x80U;
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// An empty name or IP address or an inactive gateway/reflector is not added
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if (address.size()>0U && name.size()>0U && active) {
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if (reflectors && 0==name.compare(0, 3, "REF"))
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gwy_map[name] = address.append(" 20001");
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else if (repeaters && name.compare(0, 3, "REF"))
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gwy_map[name] = address.append(" 20001");
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}
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}
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ret = read(socket, buffer, 2U);
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}
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printf("Authorized DPlus with %s using callsign %s\n", hostname.c_str(), callsign.c_str());
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printf("Added %ld DPlus gateways\n", gwy_map.size());
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socket.close();
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delete[] buffer;
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return true;
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}
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void CDPlusAuthenticator::Trim(std::string &s)
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{
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auto it = s.begin();
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while (it!=s.end() && isspace(*it))
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s.erase(it);
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auto rit = s.rbegin();
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while (rit!=s.rend() && isspace(*rit)) {
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s.resize(s.size() - 1);
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rit = s.rbegin();
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}
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}
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bool CDPlusAuthenticator::read(CTCPReaderWriterClient &socket, unsigned char *buffer, unsigned int len) const
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{
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unsigned int offset = 0U;
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do {
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int n = socket.read(buffer + offset, len - offset, 10U);
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if (n < 0)
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return false;
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offset += n;
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} while ((len - offset) > 0U);
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return true;
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}
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@ -0,0 +1,40 @@
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#pragma once
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/*
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* Copyright (C) 2010-2013 by Jonathan Naylor G4KLX
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* Copyright (C) 2018 by Thomas A. Early N7TAE
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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 <netinet/in.h>
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#include <map>
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#include <string>
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#include "TCPReaderWriterClient.h"
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class CDPlusAuthenticator {
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public:
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CDPlusAuthenticator(const std::string &loginCallsign, const std::string &address);
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~CDPlusAuthenticator();
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bool Process(std::map<std::string, std::string> &gwy_map, const bool reflectors, const bool repeaters);
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private:
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std::string m_loginCallsign;
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std::string m_address;
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void Trim(std::string &s);
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bool authenticate(const std::string &callsign, const std::string &hostname, std::map<std::string, std::string> &gwy_map, const bool reflectors, const bool repeaters);
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bool read(CTCPReaderWriterClient &socket, unsigned char *buffer, unsigned int len) const;
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};
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@ -0,0 +1,243 @@
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/*
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* Copyright (C) 2010-2013 by Jonathan Naylor G4KLX
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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 "TCPReaderWriterClient.h"
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//#include "UDPReaderWriter.h"
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#include <cstdio>
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#include <cerrno>
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#include <cassert>
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#include <cstring>
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CTCPReaderWriterClient::CTCPReaderWriterClient(const std::string &address, unsigned int port, const std::string &localAddress) :
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m_address(address),
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m_port(port),
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m_localAddress(localAddress),
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m_fd(-1)
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{
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assert(address.size());
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assert(port > 0U);
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}
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CTCPReaderWriterClient::CTCPReaderWriterClient(int fd) :
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m_address(),
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m_port(0U),
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m_localAddress(),
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m_fd(fd)
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{
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assert(fd >= 0);
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}
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CTCPReaderWriterClient::CTCPReaderWriterClient() :
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m_address(),
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m_port(0U),
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m_localAddress(),
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m_fd(-1)
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{
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}
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CTCPReaderWriterClient::~CTCPReaderWriterClient()
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{
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}
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bool CTCPReaderWriterClient::open(const std::string& address, unsigned int port, const std::string& localAddress)
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{
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m_address = address;
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m_port = port;
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m_localAddress = localAddress;
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return open();
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}
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bool CTCPReaderWriterClient::open()
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{
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if (m_fd != -1)
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return true;
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if (0 == m_address.size() || m_port == 0U)
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return false;
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m_fd = ::socket(PF_INET, SOCK_STREAM, 0);
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if (m_fd < 0) {
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fprintf(stderr, "Cannot create the TCP client socket, err=%d\n", errno);
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return false;
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}
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if (m_localAddress.size()) {
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sockaddr_in addr;
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::memset(&addr, 0x00, sizeof(struct sockaddr_in));
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addr.sin_family = AF_INET;
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addr.sin_port = 0U;
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addr.sin_addr.s_addr = ::inet_addr(m_localAddress.c_str());
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if (addr.sin_addr.s_addr == INADDR_NONE) {
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fprintf(stderr, "The address is invalid - %s\n", m_localAddress.c_str());
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close();
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return false;
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}
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if (::bind(m_fd, (sockaddr*)&addr, sizeof(sockaddr_in)) == -1) {
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fprintf(stderr, "Cannot bind the TCP client address, err=%d\n", errno);
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close();
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return false;
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}
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}
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struct sockaddr_in addr;
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::memset(&addr, 0x00, sizeof(struct sockaddr_in));
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addr.sin_family = AF_INET;
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addr.sin_port = htons(m_port);
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addr.sin_addr = lookup(m_address);
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if (addr.sin_addr.s_addr == INADDR_NONE) {
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close();
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return false;
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}
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if (::connect(m_fd, (sockaddr*)&addr, sizeof(struct sockaddr_in)) == -1) {
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fprintf(stderr, "Cannot connect the TCP client socket, err=%d\n", errno);
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close();
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return false;
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}
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int noDelay = 1;
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if (::setsockopt(m_fd, IPPROTO_TCP, TCP_NODELAY, (char *)&noDelay, sizeof(noDelay)) == -1) {
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fprintf(stderr, "Cannot set the TCP client socket option, err=%d\n", errno);
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close();
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return false;
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}
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return true;
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}
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int CTCPReaderWriterClient::read(unsigned char* buffer, unsigned int length, unsigned int secs, unsigned int msecs)
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{
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assert(buffer != NULL);
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assert(length > 0U);
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assert(m_fd != -1);
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// Check that the recv() won't block
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fd_set readFds;
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FD_ZERO(&readFds);
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FD_SET(m_fd, &readFds);
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// Return after timeout
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timeval tv;
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tv.tv_sec = secs;
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tv.tv_usec = msecs * 1000;
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int ret = ::select(m_fd + 1, &readFds, NULL, NULL, &tv);
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if (ret < 0) {
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fprintf(stderr, "Error returned from TCP client select, err=%d\n", errno);
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return -1;
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}
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if (!FD_ISSET(m_fd, &readFds))
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return 0;
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ssize_t len = ::recv(m_fd, (char*)buffer, length, 0);
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if (len == 0) {
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return -2;
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} else if (len < 0) {
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fprintf(stderr, "Error returned from recv, err=%d\n", errno);
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return -1;
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}
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return len;
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}
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int CTCPReaderWriterClient::readLine(std::string& line, unsigned int secs)
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{
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//maybe there is a better way to do this like reading blocks, pushing them for later calls
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//Nevermind, we'll read one char at a time for the time being.
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unsigned char c;
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int resultCode;
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int len = 0;
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line = "";
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do
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||||||
|
{
|
||||||
|
resultCode = read(&c, 1, secs);
|
||||||
|
if(resultCode == 1){
|
||||||
|
line += c;
|
||||||
|
len++;
|
||||||
|
}
|
||||||
|
}while(c != '\n' && resultCode == 1);
|
||||||
|
|
||||||
|
return resultCode <= 0 ? resultCode : len;
|
||||||
|
}
|
||||||
|
|
||||||
|
bool CTCPReaderWriterClient::write(const unsigned char* buffer, unsigned int length)
|
||||||
|
{
|
||||||
|
assert(buffer != NULL);
|
||||||
|
assert(length > 0U);
|
||||||
|
assert(m_fd != -1);
|
||||||
|
|
||||||
|
ssize_t ret = ::send(m_fd, (char *)buffer, length, 0);
|
||||||
|
if (ret != ssize_t(length)) {
|
||||||
|
fprintf(stderr, "Error returned from send, err=%d\n", errno);
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
bool CTCPReaderWriterClient::writeLine(const std::string& line)
|
||||||
|
{
|
||||||
|
std::string lineCopy(line);
|
||||||
|
if(lineCopy.size() > 0 && lineCopy.at(lineCopy.size() - 1) != '\n')
|
||||||
|
lineCopy.append("\n");
|
||||||
|
|
||||||
|
//stupidly write one char after the other
|
||||||
|
size_t len = lineCopy.size();
|
||||||
|
bool result = true;
|
||||||
|
for(size_t i = 0; i < len && result; i++){
|
||||||
|
unsigned char c = lineCopy.at(i);
|
||||||
|
result = write(&c , 1);
|
||||||
|
}
|
||||||
|
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
void CTCPReaderWriterClient::close()
|
||||||
|
{
|
||||||
|
if (m_fd != -1) {
|
||||||
|
::close(m_fd);
|
||||||
|
m_fd = -1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
in_addr CTCPReaderWriterClient::lookup(const std::string &hostname)
|
||||||
|
{
|
||||||
|
in_addr addr;
|
||||||
|
in_addr_t address = ::inet_addr(hostname.c_str());
|
||||||
|
if (address != in_addr_t(-1)) {
|
||||||
|
addr.s_addr = address;
|
||||||
|
return addr;
|
||||||
|
}
|
||||||
|
|
||||||
|
struct hostent* hp = ::gethostbyname(hostname.c_str());
|
||||||
|
if (hp != NULL) {
|
||||||
|
::memcpy(&addr, hp->h_addr_list[0], sizeof(struct in_addr));
|
||||||
|
return addr;
|
||||||
|
}
|
||||||
|
|
||||||
|
fprintf(stderr, "Cannot find address for host %s", hostname.c_str());
|
||||||
|
|
||||||
|
addr.s_addr = INADDR_NONE;
|
||||||
|
return addr;
|
||||||
|
}
|
||||||
@ -0,0 +1,56 @@
|
|||||||
|
#pragma once
|
||||||
|
|
||||||
|
/* end of inma once */
|
||||||
|
/*
|
||||||
|
* Copyright (C) 2010,2011,2012,2013 by Jonathan Naylor G4KLX
|
||||||
|
*
|
||||||
|
* 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 2 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, write to the Free Software
|
||||||
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <netdb.h>
|
||||||
|
#include <sys/time.h>
|
||||||
|
#include <sys/types.h>
|
||||||
|
#include <sys/socket.h>
|
||||||
|
#include <unistd.h>
|
||||||
|
#include <netinet/in.h>
|
||||||
|
#include <netinet/tcp.h>
|
||||||
|
#include <arpa/inet.h>
|
||||||
|
#include <errno.h>
|
||||||
|
#include <string>
|
||||||
|
|
||||||
|
class CTCPReaderWriterClient {
|
||||||
|
public:
|
||||||
|
CTCPReaderWriterClient(const std::string &address, unsigned int port, const std::string &localAddress = std::string(""));
|
||||||
|
CTCPReaderWriterClient(int fd);
|
||||||
|
CTCPReaderWriterClient();
|
||||||
|
~CTCPReaderWriterClient();
|
||||||
|
|
||||||
|
bool open(const std::string &address, unsigned int port, const std::string &localAddress = std::string(""));
|
||||||
|
bool open();
|
||||||
|
|
||||||
|
int read(unsigned char *buffer, unsigned int length, unsigned int secs, unsigned int msecs = 0U);
|
||||||
|
int readLine(std::string &line, unsigned int secs);
|
||||||
|
bool write(const unsigned char* buffer, unsigned int length);
|
||||||
|
bool writeLine(const std::string &line);
|
||||||
|
in_addr lookup(const std::string &hostname);
|
||||||
|
|
||||||
|
void close();
|
||||||
|
|
||||||
|
private:
|
||||||
|
std::string m_address;
|
||||||
|
unsigned short m_port;
|
||||||
|
std::string m_localAddress;
|
||||||
|
int m_fd;
|
||||||
|
};
|
||||||
Loading…
Reference in new issue