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/*
* barrier -- mouse and keyboard sharing utility
* Copyright (C) 2012-2016 Symless Ltd.
* Copyright (C) 2002 Chris Schoeneman
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file LICENSE that should have accompanied this file.
*
* This package 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 "net/NetworkAddress.h"
#include "net/XSocket.h"
#include "arch/Arch.h"
#include "arch/XArch.h"
#include <cstdlib>
//
// NetworkAddress
//
static bool parse_address(const std::string& address, std::string& host, int& port)
{
/* Three cases ---
* brackets: parse inside for host, check end for port as :INTEGER. DONE
* one colon: ipv4 address with port. DONE
* otherwise: all host, no port. DONE
*
* very, very little error checking. depends on address being trimmed before call.
*
* does not override port with a default value if no port was found in address.
*/
if (address[0] == '[') {
// bracketed host possibly followed by port as :INTEGER
auto endBracket = address.find(']', 1);
if (endBracket == std::string::npos)
return false;
host = address.substr(1, endBracket - 1);
if (endBracket + 1 < address.length()) {
// port follows (or garbage)
if (address[endBracket + 1] != ':')
return false;
port = std::strtol(&address[endBracket + 2], nullptr, 10);
}
} else {
auto colon = address.find(':');
if (colon != std::string::npos && address.find(':', colon + 1) == std::string::npos) {
// one single colon, must be ipv4 with port
host = address.substr(0, colon);
port = std::strtol(&address[colon + 1], nullptr, 10);
} else {
// no colons (ipv4) or more than one colon (ipv6), both without port
host = address;
}
}
return true;
}
// name re-resolution adapted from a patch by Brent Priddy.
NetworkAddress::NetworkAddress() :
m_address(NULL),
m_hostname(),
m_port(0)
{
// note -- make no calls to Network socket interface here;
// we're often called prior to Network::init().
}
NetworkAddress::NetworkAddress(int port) :
m_address(NULL),
m_hostname(),
m_port(port)
{
checkPort();
m_address = ARCH->newAnyAddr(IArchNetwork::kINET);
ARCH->setAddrPort(m_address, m_port);
}
NetworkAddress::NetworkAddress(const NetworkAddress& addr) :
m_address(addr.m_address != NULL ? ARCH->copyAddr(addr.m_address) : NULL),
m_hostname(addr.m_hostname),
m_port(addr.m_port)
{
// do nothing
}
NetworkAddress::NetworkAddress(const String& hostname, int port) :
m_address(NULL),
m_hostname(hostname),
m_port(port)
{
if (!parse_address(hostname, m_hostname, m_port))
throw XSocketAddress(XSocketAddress::kUnknown,
m_hostname, m_port);
checkPort();
}
NetworkAddress::~NetworkAddress()
{
if (m_address != NULL) {
ARCH->closeAddr(m_address);
}
}
NetworkAddress&
NetworkAddress::operator=(const NetworkAddress& addr)
{
ArchNetAddress newAddr = NULL;
if (addr.m_address != NULL) {
newAddr = ARCH->copyAddr(addr.m_address);
}
if (m_address != NULL) {
ARCH->closeAddr(m_address);
}
m_address = newAddr;
m_hostname = addr.m_hostname;
m_port = addr.m_port;
return *this;
}
void
NetworkAddress::resolve()
{
// discard previous address
if (m_address != NULL) {
ARCH->closeAddr(m_address);
m_address = NULL;
}
try {
// if hostname is empty then use wildcard address otherwise look
// up the name.
if (m_hostname.empty()) {
m_address = ARCH->newAnyAddr(IArchNetwork::kINET6);
}
else {
m_address = ARCH->nameToAddr(m_hostname);
}
}
catch (XArchNetworkNameUnknown&) {
throw XSocketAddress(XSocketAddress::kNotFound, m_hostname, m_port);
}
catch (XArchNetworkNameNoAddress&) {
throw XSocketAddress(XSocketAddress::kNoAddress, m_hostname, m_port);
}
catch (XArchNetworkNameUnsupported&) {
throw XSocketAddress(XSocketAddress::kUnsupported, m_hostname, m_port);
}
catch (XArchNetworkName&) {
throw XSocketAddress(XSocketAddress::kUnknown, m_hostname, m_port);
}
// set port in address
ARCH->setAddrPort(m_address, m_port);
}
bool
NetworkAddress::operator==(const NetworkAddress& addr) const
{
return ARCH->isEqualAddr(m_address, addr.m_address);
}
bool
NetworkAddress::operator!=(const NetworkAddress& addr) const
{
return !operator==(addr);
}
bool
NetworkAddress::isValid() const
{
return (m_address != NULL);
}
const ArchNetAddress&
NetworkAddress::getAddress() const
{
return m_address;
}
int
NetworkAddress::getPort() const
{
return m_port;
}
String
NetworkAddress::getHostname() const
{
return m_hostname;
}
void
NetworkAddress::checkPort()
{
// check port number
if (m_port <= 0 || m_port > 65535) {
throw XSocketAddress(XSocketAddress::kBadPort, m_hostname, m_port);
}
}
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