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ZeroTierOne/node/InetAddress.cpp

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/*
* ZeroTier One - Network Virtualization Everywhere
* Copyright (C) 2011-2015 ZeroTier, Inc.
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
* --
*
* ZeroTier may be used and distributed under the terms of the GPLv3, which
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
*
* If you would like to embed ZeroTier into a commercial application or
* redistribute it in a modified binary form, please contact ZeroTier Networks
* LLC. Start here: http://www.zerotier.com/
*/
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <string>
#include "Constants.hpp"
#include "InetAddress.hpp"
#include "Utils.hpp"
namespace ZeroTier {
const InetAddress InetAddress::LO4("127.0.0.1",0);
const InetAddress InetAddress::LO6("::1",0);
const InetAddress InetAddress::DEFAULT4((uint32_t)0,0);
const InetAddress InetAddress::DEFAULT6((const void *)0,16,0);
InetAddress::IpScope InetAddress::ipScope() const
throw()
{
switch(ss_family) {
case AF_INET: {
const uint32_t ip = Utils::ntoh((uint32_t)reinterpret_cast<const struct sockaddr_in *>(this)->sin_addr.s_addr);
switch(ip >> 24) {
case 0x00: return IP_SCOPE_NONE; // 0.0.0.0/8 (reserved, never used)
case 0x06: return IP_SCOPE_PSEUDOPRIVATE; // 6.0.0.0/8 (US Army)
case 0x0a: return IP_SCOPE_PRIVATE; // 10.0.0.0/8
case 0x0b: return IP_SCOPE_PSEUDOPRIVATE; // 11.0.0.0/8 (US DoD)
case 0x15: return IP_SCOPE_PSEUDOPRIVATE; // 21.0.0.0/8 (US DDN-RVN)
case 0x16: return IP_SCOPE_PSEUDOPRIVATE; // 22.0.0.0/8 (US DISA)
case 0x19: return IP_SCOPE_PSEUDOPRIVATE; // 25.0.0.0/8 (UK Ministry of Defense)
case 0x1a: return IP_SCOPE_PSEUDOPRIVATE; // 26.0.0.0/8 (US DISA)
case 0x1c: return IP_SCOPE_PSEUDOPRIVATE; // 28.0.0.0/8 (US DSI-North)
case 0x1d: return IP_SCOPE_PSEUDOPRIVATE; // 29.0.0.0/8 (US DISA)
case 0x1e: return IP_SCOPE_PSEUDOPRIVATE; // 30.0.0.0/8 (US DISA)
case 0x2c: return IP_SCOPE_PSEUDOPRIVATE; // 44.0.0.0/8 (Amateur Radio)
case 0x33: return IP_SCOPE_PSEUDOPRIVATE; // 51.0.0.0/8 (UK Department of Social Security)
case 0x37: return IP_SCOPE_PSEUDOPRIVATE; // 55.0.0.0/8 (US DoD)
case 0x38: return IP_SCOPE_PSEUDOPRIVATE; // 56.0.0.0/8 (US Postal Service)
case 0x64:
if ((ip & 0xffc00000) == 0x64400000) return IP_SCOPE_SHARED; // 100.64.0.0/10
break;
case 0x7f: return IP_SCOPE_LOOPBACK; // 127.0.0.0/8
case 0xa9:
if ((ip & 0xffff0000) == 0xa9fe0000) return IP_SCOPE_LINK_LOCAL; // 169.254.0.0/16
break;
case 0xac:
if ((ip & 0xfff00000) == 0xac100000) return IP_SCOPE_PRIVATE; // 172.16.0.0/12
break;
case 0xc0:
if ((ip & 0xffff0000) == 0xc9a80000) return IP_SCOPE_PRIVATE; // 192.168.0.0/16
break;
case 0xff: return IP_SCOPE_NONE; // 255.0.0.0/8 (broadcast, or unused/unusable)
default:
switch(ip >> 28) {
case 0xe: return IP_SCOPE_MULTICAST; // 224.0.0.0/4
case 0xf: return IP_SCOPE_PSEUDOPRIVATE; // 240.0.0.0/4 ("reserved," usually unusable)
default: return IP_SCOPE_GLOBAL; // everything else
}
break;
}
} break;
case AF_INET6: {
const unsigned char *ip = reinterpret_cast<const unsigned char *>(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr);
if ((ip[0] & 0xf0) == 0xf0) {
if (ip[0] == 0xff) return IP_SCOPE_MULTICAST; // ff00::/8
if ((ip[0] == 0xfe)&&((ip[1] & 0xc0) == 0x80)) return IP_SCOPE_LINK_LOCAL; // fe80::/10
if ((ip[0] & 0xfe) == 0xfc) return IP_SCOPE_PRIVATE; // fc00::/7
}
unsigned int k = 0;
while ((!ip[k])&&(k < 15)) ++k;
if (k == 15) { // all 0's except last byte
if (ip[15] == 0x01) return IP_SCOPE_LOOPBACK; // ::1/128
if (ip[15] == 0x00) return IP_SCOPE_NONE; // ::/128
}
return IP_SCOPE_GLOBAL;
} break;
}
return IP_SCOPE_NONE;
}
void InetAddress::set(const std::string &ip,unsigned int port)
throw()
{
if (ip.find(':') != std::string::npos) {
struct sockaddr_in6 sin6;
memset(&sin6,0,sizeof(sin6));
sin6.sin6_family = AF_INET6;
sin6.sin6_port = Utils::hton((uint16_t)port);
if (inet_pton(AF_INET6,ip.c_str(),(void *)&(sin6.sin6_addr.s6_addr)) <= 0)
memset(this,0,sizeof(InetAddress));
else *this = sin6;
} else {
struct sockaddr_in sin;
memset(&sin,0,sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_port = Utils::hton((uint16_t)port);
if (inet_pton(AF_INET,ip.c_str(),(void *)&(sin.sin_addr.s_addr)) <= 0)
memset(this,0,sizeof(InetAddress));
else *this = sin;
}
}
void InetAddress::set(const void *ipBytes,unsigned int ipLen,unsigned int port)
throw()
{
memset(this,0,sizeof(InetAddress));
if (ipLen == 4) {
setV4();
if (ipBytes)
memcpy(rawIpData(),ipBytes,4);
setPort(port);
} else if (ipLen == 16) {
setV6();
if (ipBytes)
memcpy(rawIpData(),ipBytes,16);
setPort(port);
}
}
std::string InetAddress::toString() const
{
char buf[128];
switch(ss_family) {
case AF_INET:
Utils::snprintf(buf,sizeof(buf),"%d.%d.%d.%d/%d",
(int)(reinterpret_cast<const unsigned char *>(&(reinterpret_cast<const struct sockaddr_in *>(this)->sin_addr.s_addr)))[0],
(int)(reinterpret_cast<const unsigned char *>(&(reinterpret_cast<const struct sockaddr_in *>(this)->sin_addr.s_addr)))[1],
(int)(reinterpret_cast<const unsigned char *>(&(reinterpret_cast<const struct sockaddr_in *>(this)->sin_addr.s_addr)))[2],
(int)(reinterpret_cast<const unsigned char *>(&(reinterpret_cast<const struct sockaddr_in *>(this)->sin_addr.s_addr)))[3],
(int)Utils::ntoh((uint16_t)(reinterpret_cast<const struct sockaddr_in *>(this)->sin_port))
);
return std::string(buf);
case AF_INET6:
Utils::snprintf(buf,sizeof(buf),"%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x/%d",
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[0]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[1]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[2]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[3]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[4]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[5]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[6]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[7]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[8]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[9]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[10]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[11]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[12]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[13]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[14]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[15]),
(int)Utils::ntoh((uint16_t)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_port))
);
return std::string(buf);
}
return std::string();
}
std::string InetAddress::toIpString() const
{
char buf[128];
switch(ss_family) {
case AF_INET:
Utils::snprintf(buf,sizeof(buf),"%d.%d.%d.%d",
(int)(reinterpret_cast<const unsigned char *>(&(reinterpret_cast<const struct sockaddr_in *>(this)->sin_addr.s_addr)))[0],
(int)(reinterpret_cast<const unsigned char *>(&(reinterpret_cast<const struct sockaddr_in *>(this)->sin_addr.s_addr)))[1],
(int)(reinterpret_cast<const unsigned char *>(&(reinterpret_cast<const struct sockaddr_in *>(this)->sin_addr.s_addr)))[2],
(int)(reinterpret_cast<const unsigned char *>(&(reinterpret_cast<const struct sockaddr_in *>(this)->sin_addr.s_addr)))[3]
);
return std::string(buf);
case AF_INET6:
Utils::snprintf(buf,sizeof(buf),"%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x",
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[0]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[1]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[2]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[3]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[4]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[5]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[6]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[7]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[8]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[9]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[10]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[11]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[12]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[13]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[14]),
(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[15])
);
return std::string(buf);
}
return std::string();
}
void InetAddress::fromString(const std::string &ipSlashPort)
{
std::size_t slashAt = ipSlashPort.find('/');
if ((slashAt == std::string::npos)||(slashAt >= ipSlashPort.length()))
set(ipSlashPort,0);
else {
long p = strtol(ipSlashPort.substr(slashAt+1).c_str(),(char **)0,10);
if ((p > 0)&&(p <= 0xffff))
set(ipSlashPort.substr(0,slashAt),(unsigned int)p);
else set(ipSlashPort.substr(0,slashAt),0);
}
}
InetAddress InetAddress::netmask() const
throw()
{
InetAddress r(*this);
switch(r.ss_family) {
case AF_INET:
reinterpret_cast<struct sockaddr_in *>(&r)->sin_addr.s_addr = Utils::hton((uint32_t)(0xffffffff << (32 - netmaskBits())));
break;
case AF_INET6: {
unsigned char *bf = reinterpret_cast<unsigned char *>(reinterpret_cast<struct sockaddr_in6 *>(&r)->sin6_addr.s6_addr);
signed int bitsLeft = (signed int)netmaskBits();
for(unsigned int i=0;i<16;++i) {
if (bitsLeft > 0) {
bf[i] |= (unsigned char)((bitsLeft >= 8) ? 0x00 : (0xff >> bitsLeft));
bitsLeft -= 8;
}
}
} break;
}
return r;
}
InetAddress InetAddress::broadcast() const
throw()
{
InetAddress r(*this);
switch(r.ss_family) {
case AF_INET:
reinterpret_cast<struct sockaddr_in *>(&r)->sin_addr.s_addr |= Utils::hton((uint32_t)(0xffffffff >> netmaskBits()));
break;
case AF_INET6: {
unsigned char *bf = reinterpret_cast<unsigned char *>(reinterpret_cast<struct sockaddr_in6 *>(&r)->sin6_addr.s6_addr);
signed int bitsLeft = (signed int)netmaskBits();
for(unsigned int i=0;i<16;++i) {
if (bitsLeft > 0) {
bf[i] |= (unsigned char)((bitsLeft >= 8) ? 0x00 : (0xff >> bitsLeft));
bitsLeft -= 8;
}
}
} break;
}
return r;
}
InetAddress InetAddress::makeIpv6LinkLocal(const MAC &mac)
throw()
{
struct sockaddr_in6 sin6;
sin6.sin6_family = AF_INET6;
sin6.sin6_addr.s6_addr[0] = 0xfe;
sin6.sin6_addr.s6_addr[1] = 0x80;
sin6.sin6_addr.s6_addr[2] = 0x00;
sin6.sin6_addr.s6_addr[3] = 0x00;
sin6.sin6_addr.s6_addr[4] = 0x00;
sin6.sin6_addr.s6_addr[5] = 0x00;
sin6.sin6_addr.s6_addr[6] = 0x00;
sin6.sin6_addr.s6_addr[7] = 0x00;
sin6.sin6_addr.s6_addr[8] = mac[0] & 0xfd;
sin6.sin6_addr.s6_addr[9] = mac[1];
sin6.sin6_addr.s6_addr[10] = mac[2];
sin6.sin6_addr.s6_addr[11] = 0xff;
sin6.sin6_addr.s6_addr[12] = 0xfe;
sin6.sin6_addr.s6_addr[13] = mac[3];
sin6.sin6_addr.s6_addr[14] = mac[4];
sin6.sin6_addr.s6_addr[15] = mac[5];
sin6.sin6_port = Utils::hton((uint16_t)64);
return InetAddress(sin6);
}
} // namespace ZeroTier
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