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/*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* IPV4Address.cpp
* A IPV4 address
* Copyright (C) 2011 Simon Newton
*/
#if HAVE_CONFIG_H
#include <config.h>
#endif // HAVE_CONFIG_H
#ifdef HAVE_WINSOCK2_H
#include <ola/win/CleanWinSock2.h>
#ifndef in_addr_t
#define in_addr_t uint32_t
#endif // !in_addr_t
#endif // HAVE_WINSOCK2_H
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h> // Required by FreeBSD
#endif // HAVE_SYS_SOCKET_H
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif // HAVE_ARPA_INET_H
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h> // Required by FreeBSD
#endif // HAVE_NETINET_IN_H
#include <assert.h>
#include <math.h>
#include <stdint.h>
#include <limits>
#include <string>
#include "common/network/NetworkUtilsInternal.h"
#include "ola/Logging.h"
#include "ola/network/IPV4Address.h"
#include "ola/network/NetworkUtils.h"
namespace ola {
namespace network {
using std::string;
bool IPV4Address::operator<(const IPV4Address &other) const {
// Stored in network byte order, so convert to sort appropriately
return NetworkToHost(m_address) < NetworkToHost(other.m_address);
}
bool IPV4Address::operator>(const IPV4Address &other) const {
// Stored in network byte order, so convert to sort appropriately
return NetworkToHost(m_address) > NetworkToHost(other.m_address);
}
bool IPV4StringToAddress(const string &address, struct in_addr *addr) {
bool ok;
// TODO(Peter): This currently allows some rather quirky values as per
// inet_aton, we may want to restrict that in future to match IPV4Validator
if (address.empty()) {
// Don't bother trying to extract an address if we weren't given one
return false;
}
#ifdef HAVE_INET_PTON
ok = (1 == inet_pton(AF_INET, address.data(), addr));
#elif HAVE_INET_ATON
ok = (1 == inet_aton(address.data(), addr));
#else
in_addr_t ip_addr4 = inet_addr(address.c_str());
ok = (INADDR_NONE != ip_addr4 || address == "255.255.255.255");
addr->s_addr = ip_addr4;
#endif // HAVE_INET_PTON
if (!ok) {
OLA_WARN << "Could not convert address " << address;
}
return ok;
}
bool IPV4Address::IsWildcard() const {
return m_address == INADDR_ANY;
}
string IPV4Address::ToString() const {
struct in_addr addr;
addr.s_addr = m_address;
#ifdef HAVE_INET_NTOP
char str[INET_ADDRSTRLEN];
if (inet_ntop(AF_INET, &addr, str, INET_ADDRSTRLEN) == NULL) {
OLA_WARN << "Failed to convert address to string using inet_ntop, failing "
<< "back to inet_ntoa";
return inet_ntoa(addr);
}
return str;
#else
return inet_ntoa(addr);
#endif // HAVE_INET_NTOP
}
IPV4Address* IPV4Address::FromString(const string &address) {
struct in_addr addr;
if (!IPV4StringToAddress(address, &addr)) {
return NULL;
}
return new IPV4Address(addr.s_addr);
}
bool IPV4Address::FromString(const string &address, IPV4Address *target) {
struct in_addr addr;
if (!IPV4StringToAddress(address, &addr)) {
return false;
}
*target = IPV4Address(addr.s_addr);
return true;
}
IPV4Address IPV4Address::FromStringOrDie(const string &address) {
struct in_addr addr;
assert(IPV4StringToAddress(address, &addr));
return IPV4Address(addr.s_addr);
}
bool IPV4Address::ToCIDRMask(IPV4Address address, uint8_t *mask) {
uint32_t netmask = NetworkToHost(address.AsInt());
uint8_t bits = 0;
bool seen_one = false;
for (uint8_t i = 0; i < std::numeric_limits<uint32_t>::digits; i++) {
if (netmask & 1) {
bits++;
seen_one = true;
} else {
if (seen_one) {
return false;
}
}
netmask = netmask >> 1;
}
*mask = bits;
return true;
}
IPV4Address IPV4Address::WildCard() {
return IPV4Address(INADDR_ANY);
}
IPV4Address IPV4Address::Broadcast() {
return IPV4Address(INADDR_NONE);
}
IPV4Address IPV4Address::Loopback() {
return IPV4Address(HostToNetwork(0x7f000001));
}
} // namespace network
} // namespace ola
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