barrier/lib/net/CNetworkAddress.cpp

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/*
* synergy -- mouse and keyboard sharing utility
* 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 COPYING 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.
*/
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#include "CNetworkAddress.h"
#include "XSocket.h"
#include <cstdlib>
#include <cstring>
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//
// CNetworkAddress
//
CNetworkAddress::CNetworkAddress() :
m_port(0)
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{
// note -- make no calls to CNetwork socket interface here;
// we're often called prior to CNetwork::init().
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struct sockaddr_in* inetAddress = reinterpret_cast<
struct sockaddr_in*>(&m_address);
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inetAddress->sin_family = AF_INET;
inetAddress->sin_port = CNetwork::swaphtons(m_port);
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inetAddress->sin_addr.s_addr = INADDR_ANY;
memset(inetAddress->sin_zero, 0, sizeof(inetAddress->sin_zero));
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}
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CNetworkAddress::CNetworkAddress(UInt16 port) :
m_port(port)
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{
if (port == 0) {
throw XSocketAddress(XSocketAddress::kBadPort, m_hostname, m_port);
}
struct sockaddr_in* inetAddress = reinterpret_cast<
struct sockaddr_in*>(&m_address);
inetAddress->sin_family = AF_INET;
inetAddress->sin_port = CNetwork::swaphtons(m_port);
inetAddress->sin_addr.s_addr = INADDR_ANY;
memset(inetAddress->sin_zero, 0, sizeof(inetAddress->sin_zero));
}
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CNetworkAddress::CNetworkAddress(const CString& hostname_, UInt16 port) :
m_hostname(hostname_),
m_port(port)
{
CString hostname(m_hostname);
if (port == 0) {
throw XSocketAddress(XSocketAddress::kBadPort, m_hostname, m_port);
}
// check for port suffix
CString::size_type i = hostname.rfind(':');
if (i != CString::npos && i + 1 < hostname.size()) {
// found a colon. see if it looks like an IPv6 address.
bool colonNotation = false;
bool dotNotation = false;
bool doubleColon = false;
for (CString::size_type j = 0; j < i; ++j) {
if (hostname[j] == ':') {
colonNotation = true;
dotNotation = false;
if (hostname[j + 1] == ':') {
doubleColon = true;
}
}
else if (hostname[j] == '.' && colonNotation) {
dotNotation = true;
}
}
// port suffix is ambiguous with IPv6 notation if there's
// a double colon and the end of the address is not in dot
// notation. in that case we assume it's not a port suffix.
// the user can replace the double colon with zeros to
// disambiguate.
if ((!doubleColon || dotNotation) || !colonNotation) {
char* end;
long suffixPort = strtol(hostname.c_str() + i + 1, &end, 10);
if (end == hostname.c_str() + i + 1 || *end != '\0' ||
suffixPort <= 0 || suffixPort > 65535) {
// bogus port
throw XSocketAddress(XSocketAddress::kBadPort,
m_hostname, m_port);
}
else {
// good port
port = static_cast<UInt16>(suffixPort);
hostname.erase(i);
}
}
}
// if hostname is empty then use wildcard address
if (hostname.empty()) {
struct sockaddr_in* inetAddress = reinterpret_cast<
struct sockaddr_in*>(&m_address);
inetAddress->sin_family = AF_INET;
inetAddress->sin_port = CNetwork::swaphtons(port);
inetAddress->sin_addr.s_addr = INADDR_ANY;
memset(inetAddress->sin_zero, 0, sizeof(inetAddress->sin_zero));
return;
}
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// convert dot notation to address
unsigned long addr = CNetwork::inet_addr(hostname.c_str());
if (addr != INADDR_NONE) {
struct sockaddr_in* inetAddress = reinterpret_cast<
struct sockaddr_in*>(&m_address);
inetAddress->sin_family = AF_INET;
inetAddress->sin_port = CNetwork::swaphtons(port);
inetAddress->sin_addr.s_addr = addr;
memset(inetAddress->sin_zero, 0, sizeof(inetAddress->sin_zero));
return;
}
// look up name
CNetwork::CHostInfo hostInfo;
switch (CNetwork::gethostbyname(&hostInfo, hostname.c_str())) {
case CNetwork::kHOST_OK:
break;
case CNetwork::kHOST_NOT_FOUND:
throw XSocketAddress(XSocketAddress::kNotFound, hostname, port);
case CNetwork::kNO_DATA:
throw XSocketAddress(XSocketAddress::kNoAddress, hostname, port);
case CNetwork::kNO_RECOVERY:
case CNetwork::kTRY_AGAIN:
default:
throw XSocketAddress(XSocketAddress::kUnknown, hostname, port);
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}
struct sockaddr_in* inetAddress = reinterpret_cast<
struct sockaddr_in*>(&m_address);
inetAddress->sin_family = hostInfo.m_addressType;
inetAddress->sin_port = CNetwork::swaphtons(port);
memcpy(&inetAddress->sin_addr, hostInfo.m_addresses[0],
hostInfo.m_addressLength);
memset(inetAddress->sin_zero, 0, sizeof(inetAddress->sin_zero));
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}
CNetworkAddress::~CNetworkAddress()
{
// do nothing
}
bool
CNetworkAddress::isValid() const
{
return (m_port != 0);
}
const CNetwork::Address*
CNetworkAddress::getAddress() const
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{
return &m_address;
}
CNetwork::AddressLength
CNetworkAddress::getAddressLength() const
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{
return sizeof(m_address);
}
CString
CNetworkAddress::getHostname() const
{
return m_hostname;
}
UInt16
CNetworkAddress::getPort() const
{
return m_port;
}