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Diffstat (limited to 'src/netbase.cpp')
-rw-r--r--src/netbase.cpp782
1 files changed, 33 insertions, 749 deletions
diff --git a/src/netbase.cpp b/src/netbase.cpp
index e2a516986c..4f243ec6f5 100644
--- a/src/netbase.cpp
+++ b/src/netbase.cpp
@@ -42,8 +42,6 @@ static CCriticalSection cs_proxyInfos;
int nConnectTimeout = DEFAULT_CONNECT_TIMEOUT;
bool fNameLookup = DEFAULT_NAME_LOOKUP;
-static const unsigned char pchIPv4[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff };
-
// Need ample time for negotiation for very slow proxies such as Tor (milliseconds)
static const int SOCKS5_RECV_TIMEOUT = 20 * 1000;
@@ -195,6 +193,16 @@ bool LookupHost(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nM
return LookupIntern(strHost.c_str(), vIP, nMaxSolutions, fAllowLookup);
}
+bool LookupHost(const char *pszName, CNetAddr& addr, bool fAllowLookup)
+{
+ std::vector<CNetAddr> vIP;
+ LookupHost(pszName, vIP, 1, fAllowLookup);
+ if(vIP.empty())
+ return false;
+ addr = vIP.front();
+ return true;
+}
+
bool Lookup(const char *pszName, std::vector<CService>& vAddr, int portDefault, bool fAllowLookup, unsigned int nMaxSolutions)
{
if (pszName[0] == 0)
@@ -223,9 +231,14 @@ bool Lookup(const char *pszName, CService& addr, int portDefault, bool fAllowLoo
return true;
}
-bool LookupNumeric(const char *pszName, CService& addr, int portDefault)
+CService LookupNumeric(const char *pszName, int portDefault)
{
- return Lookup(pszName, addr, portDefault, false);
+ CService addr;
+ // "1.2:345" will fail to resolve the ip, but will still set the port.
+ // If the ip fails to resolve, re-init the result.
+ if(!Lookup(pszName, addr, portDefault, false))
+ addr = CService();
+ return addr;
}
struct timeval MillisToTimeval(int64_t nTimeout)
@@ -629,777 +642,48 @@ bool ConnectSocketByName(CService &addr, SOCKET& hSocketRet, const char *pszDest
}
}
- addr = CService("0.0.0.0:0");
+ addr = CService();
if (!HaveNameProxy())
return false;
return ConnectThroughProxy(nameProxy, strDest, port, hSocketRet, nTimeout, outProxyConnectionFailed);
}
-void CNetAddr::Init()
-{
- memset(ip, 0, sizeof(ip));
- scopeId = 0;
-}
-
-void CNetAddr::SetIP(const CNetAddr& ipIn)
-{
- memcpy(ip, ipIn.ip, sizeof(ip));
-}
-
-void CNetAddr::SetRaw(Network network, const uint8_t *ip_in)
-{
- switch(network)
- {
- case NET_IPV4:
- memcpy(ip, pchIPv4, 12);
- memcpy(ip+12, ip_in, 4);
- break;
- case NET_IPV6:
- memcpy(ip, ip_in, 16);
- break;
- default:
- assert(!"invalid network");
- }
-}
-
-static const unsigned char pchOnionCat[] = {0xFD,0x87,0xD8,0x7E,0xEB,0x43};
-
-bool CNetAddr::SetSpecial(const std::string &strName)
-{
- if (strName.size()>6 && strName.substr(strName.size() - 6, 6) == ".onion") {
- std::vector<unsigned char> vchAddr = DecodeBase32(strName.substr(0, strName.size() - 6).c_str());
- if (vchAddr.size() != 16-sizeof(pchOnionCat))
- return false;
- memcpy(ip, pchOnionCat, sizeof(pchOnionCat));
- for (unsigned int i=0; i<16-sizeof(pchOnionCat); i++)
- ip[i + sizeof(pchOnionCat)] = vchAddr[i];
- return true;
- }
- return false;
-}
-
-CNetAddr::CNetAddr()
-{
- Init();
-}
-
-CNetAddr::CNetAddr(const struct in_addr& ipv4Addr)
-{
- SetRaw(NET_IPV4, (const uint8_t*)&ipv4Addr);
-}
-
-CNetAddr::CNetAddr(const struct in6_addr& ipv6Addr, const uint32_t scope)
-{
- SetRaw(NET_IPV6, (const uint8_t*)&ipv6Addr);
- scopeId = scope;
-}
-
-CNetAddr::CNetAddr(const char *pszIp)
-{
- Init();
- std::vector<CNetAddr> vIP;
- if (LookupHost(pszIp, vIP, 1, false))
- *this = vIP[0];
-}
-
-CNetAddr::CNetAddr(const std::string &strIp)
-{
- Init();
- std::vector<CNetAddr> vIP;
- if (LookupHost(strIp.c_str(), vIP, 1, false))
- *this = vIP[0];
-}
-
-unsigned int CNetAddr::GetByte(int n) const
-{
- return ip[15-n];
-}
-
-bool CNetAddr::IsIPv4() const
-{
- return (memcmp(ip, pchIPv4, sizeof(pchIPv4)) == 0);
-}
-
-bool CNetAddr::IsIPv6() const
-{
- return (!IsIPv4() && !IsTor());
-}
-
-bool CNetAddr::IsRFC1918() const
-{
- return IsIPv4() && (
- GetByte(3) == 10 ||
- (GetByte(3) == 192 && GetByte(2) == 168) ||
- (GetByte(3) == 172 && (GetByte(2) >= 16 && GetByte(2) <= 31)));
-}
-
-bool CNetAddr::IsRFC2544() const
-{
- return IsIPv4() && GetByte(3) == 198 && (GetByte(2) == 18 || GetByte(2) == 19);
-}
-
-bool CNetAddr::IsRFC3927() const
-{
- return IsIPv4() && (GetByte(3) == 169 && GetByte(2) == 254);
-}
-
-bool CNetAddr::IsRFC6598() const
-{
- return IsIPv4() && GetByte(3) == 100 && GetByte(2) >= 64 && GetByte(2) <= 127;
-}
-
-bool CNetAddr::IsRFC5737() const
-{
- return IsIPv4() && ((GetByte(3) == 192 && GetByte(2) == 0 && GetByte(1) == 2) ||
- (GetByte(3) == 198 && GetByte(2) == 51 && GetByte(1) == 100) ||
- (GetByte(3) == 203 && GetByte(2) == 0 && GetByte(1) == 113));
-}
-
-bool CNetAddr::IsRFC3849() const
-{
- return GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x0D && GetByte(12) == 0xB8;
-}
-
-bool CNetAddr::IsRFC3964() const
-{
- return (GetByte(15) == 0x20 && GetByte(14) == 0x02);
-}
-
-bool CNetAddr::IsRFC6052() const
-{
- static const unsigned char pchRFC6052[] = {0,0x64,0xFF,0x9B,0,0,0,0,0,0,0,0};
- return (memcmp(ip, pchRFC6052, sizeof(pchRFC6052)) == 0);
-}
-
-bool CNetAddr::IsRFC4380() const
-{
- return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0 && GetByte(12) == 0);
-}
-
-bool CNetAddr::IsRFC4862() const
-{
- static const unsigned char pchRFC4862[] = {0xFE,0x80,0,0,0,0,0,0};
- return (memcmp(ip, pchRFC4862, sizeof(pchRFC4862)) == 0);
-}
-
-bool CNetAddr::IsRFC4193() const
-{
- return ((GetByte(15) & 0xFE) == 0xFC);
-}
-
-bool CNetAddr::IsRFC6145() const
-{
- static const unsigned char pchRFC6145[] = {0,0,0,0,0,0,0,0,0xFF,0xFF,0,0};
- return (memcmp(ip, pchRFC6145, sizeof(pchRFC6145)) == 0);
-}
-
-bool CNetAddr::IsRFC4843() const
-{
- return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x00 && (GetByte(12) & 0xF0) == 0x10);
-}
-
-bool CNetAddr::IsTor() const
-{
- return (memcmp(ip, pchOnionCat, sizeof(pchOnionCat)) == 0);
-}
-
-bool CNetAddr::IsLocal() const
-{
- // IPv4 loopback
- if (IsIPv4() && (GetByte(3) == 127 || GetByte(3) == 0))
- return true;
-
- // IPv6 loopback (::1/128)
- static const unsigned char pchLocal[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
- if (memcmp(ip, pchLocal, 16) == 0)
- return true;
-
- return false;
-}
-
-bool CNetAddr::IsMulticast() const
-{
- return (IsIPv4() && (GetByte(3) & 0xF0) == 0xE0)
- || (GetByte(15) == 0xFF);
-}
-
-bool CNetAddr::IsValid() const
-{
- // Cleanup 3-byte shifted addresses caused by garbage in size field
- // of addr messages from versions before 0.2.9 checksum.
- // Two consecutive addr messages look like this:
- // header20 vectorlen3 addr26 addr26 addr26 header20 vectorlen3 addr26 addr26 addr26...
- // so if the first length field is garbled, it reads the second batch
- // of addr misaligned by 3 bytes.
- if (memcmp(ip, pchIPv4+3, sizeof(pchIPv4)-3) == 0)
- return false;
-
- // unspecified IPv6 address (::/128)
- unsigned char ipNone[16] = {};
- if (memcmp(ip, ipNone, 16) == 0)
- return false;
-
- // documentation IPv6 address
- if (IsRFC3849())
- return false;
-
- if (IsIPv4())
- {
- // INADDR_NONE
- uint32_t ipNone = INADDR_NONE;
- if (memcmp(ip+12, &ipNone, 4) == 0)
- return false;
-
- // 0
- ipNone = 0;
- if (memcmp(ip+12, &ipNone, 4) == 0)
- return false;
- }
-
- return true;
-}
-
-bool CNetAddr::IsRoutable() const
-{
- return IsValid() && !(IsRFC1918() || IsRFC2544() || IsRFC3927() || IsRFC4862() || IsRFC6598() || IsRFC5737() || (IsRFC4193() && !IsTor()) || IsRFC4843() || IsLocal());
-}
-
-enum Network CNetAddr::GetNetwork() const
-{
- if (!IsRoutable())
- return NET_UNROUTABLE;
-
- if (IsIPv4())
- return NET_IPV4;
-
- if (IsTor())
- return NET_TOR;
-
- return NET_IPV6;
-}
-
-std::string CNetAddr::ToStringIP() const
-{
- if (IsTor())
- return EncodeBase32(&ip[6], 10) + ".onion";
- CService serv(*this, 0);
- struct sockaddr_storage sockaddr;
- socklen_t socklen = sizeof(sockaddr);
- if (serv.GetSockAddr((struct sockaddr*)&sockaddr, &socklen)) {
- char name[1025] = "";
- if (!getnameinfo((const struct sockaddr*)&sockaddr, socklen, name, sizeof(name), NULL, 0, NI_NUMERICHOST))
- return std::string(name);
- }
- if (IsIPv4())
- return strprintf("%u.%u.%u.%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0));
- else
- return strprintf("%x:%x:%x:%x:%x:%x:%x:%x",
- GetByte(15) << 8 | GetByte(14), GetByte(13) << 8 | GetByte(12),
- GetByte(11) << 8 | GetByte(10), GetByte(9) << 8 | GetByte(8),
- GetByte(7) << 8 | GetByte(6), GetByte(5) << 8 | GetByte(4),
- GetByte(3) << 8 | GetByte(2), GetByte(1) << 8 | GetByte(0));
-}
-
-std::string CNetAddr::ToString() const
-{
- return ToStringIP();
-}
-
-bool operator==(const CNetAddr& a, const CNetAddr& b)
-{
- return (memcmp(a.ip, b.ip, 16) == 0);
-}
-
-bool operator!=(const CNetAddr& a, const CNetAddr& b)
-{
- return (memcmp(a.ip, b.ip, 16) != 0);
-}
-
-bool operator<(const CNetAddr& a, const CNetAddr& b)
-{
- return (memcmp(a.ip, b.ip, 16) < 0);
-}
-
-bool CNetAddr::GetInAddr(struct in_addr* pipv4Addr) const
-{
- if (!IsIPv4())
- return false;
- memcpy(pipv4Addr, ip+12, 4);
- return true;
-}
-
-bool CNetAddr::GetIn6Addr(struct in6_addr* pipv6Addr) const
-{
- memcpy(pipv6Addr, ip, 16);
- return true;
-}
-
-// get canonical identifier of an address' group
-// no two connections will be attempted to addresses with the same group
-std::vector<unsigned char> CNetAddr::GetGroup() const
-{
- std::vector<unsigned char> vchRet;
- int nClass = NET_IPV6;
- int nStartByte = 0;
- int nBits = 16;
-
- // all local addresses belong to the same group
- if (IsLocal())
- {
- nClass = 255;
- nBits = 0;
- }
-
- // all unroutable addresses belong to the same group
- if (!IsRoutable())
- {
- nClass = NET_UNROUTABLE;
- nBits = 0;
- }
- // for IPv4 addresses, '1' + the 16 higher-order bits of the IP
- // includes mapped IPv4, SIIT translated IPv4, and the well-known prefix
- else if (IsIPv4() || IsRFC6145() || IsRFC6052())
- {
- nClass = NET_IPV4;
- nStartByte = 12;
- }
- // for 6to4 tunnelled addresses, use the encapsulated IPv4 address
- else if (IsRFC3964())
- {
- nClass = NET_IPV4;
- nStartByte = 2;
- }
- // for Teredo-tunnelled IPv6 addresses, use the encapsulated IPv4 address
- else if (IsRFC4380())
- {
- vchRet.push_back(NET_IPV4);
- vchRet.push_back(GetByte(3) ^ 0xFF);
- vchRet.push_back(GetByte(2) ^ 0xFF);
- return vchRet;
- }
- else if (IsTor())
- {
- nClass = NET_TOR;
- nStartByte = 6;
- nBits = 4;
- }
- // for he.net, use /36 groups
- else if (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x04 && GetByte(12) == 0x70)
- nBits = 36;
- // for the rest of the IPv6 network, use /32 groups
- else
- nBits = 32;
-
- vchRet.push_back(nClass);
- while (nBits >= 8)
- {
- vchRet.push_back(GetByte(15 - nStartByte));
- nStartByte++;
- nBits -= 8;
- }
- if (nBits > 0)
- vchRet.push_back(GetByte(15 - nStartByte) | ((1 << (8 - nBits)) - 1));
-
- return vchRet;
-}
-
-uint64_t CNetAddr::GetHash() const
-{
- uint256 hash = Hash(&ip[0], &ip[16]);
- uint64_t nRet;
- memcpy(&nRet, &hash, sizeof(nRet));
- return nRet;
-}
-
-// private extensions to enum Network, only returned by GetExtNetwork,
-// and only used in GetReachabilityFrom
-static const int NET_UNKNOWN = NET_MAX + 0;
-static const int NET_TEREDO = NET_MAX + 1;
-int static GetExtNetwork(const CNetAddr *addr)
-{
- if (addr == NULL)
- return NET_UNKNOWN;
- if (addr->IsRFC4380())
- return NET_TEREDO;
- return addr->GetNetwork();
-}
-
-/** Calculates a metric for how reachable (*this) is from a given partner */
-int CNetAddr::GetReachabilityFrom(const CNetAddr *paddrPartner) const
-{
- enum Reachability {
- REACH_UNREACHABLE,
- REACH_DEFAULT,
- REACH_TEREDO,
- REACH_IPV6_WEAK,
- REACH_IPV4,
- REACH_IPV6_STRONG,
- REACH_PRIVATE
- };
-
- if (!IsRoutable())
- return REACH_UNREACHABLE;
-
- int ourNet = GetExtNetwork(this);
- int theirNet = GetExtNetwork(paddrPartner);
- bool fTunnel = IsRFC3964() || IsRFC6052() || IsRFC6145();
-
- switch(theirNet) {
- case NET_IPV4:
- switch(ourNet) {
- default: return REACH_DEFAULT;
- case NET_IPV4: return REACH_IPV4;
- }
- case NET_IPV6:
- switch(ourNet) {
- default: return REACH_DEFAULT;
- case NET_TEREDO: return REACH_TEREDO;
- case NET_IPV4: return REACH_IPV4;
- case NET_IPV6: return fTunnel ? REACH_IPV6_WEAK : REACH_IPV6_STRONG; // only prefer giving our IPv6 address if it's not tunnelled
- }
- case NET_TOR:
- switch(ourNet) {
- default: return REACH_DEFAULT;
- case NET_IPV4: return REACH_IPV4; // Tor users can connect to IPv4 as well
- case NET_TOR: return REACH_PRIVATE;
- }
- case NET_TEREDO:
- switch(ourNet) {
- default: return REACH_DEFAULT;
- case NET_TEREDO: return REACH_TEREDO;
- case NET_IPV6: return REACH_IPV6_WEAK;
- case NET_IPV4: return REACH_IPV4;
- }
- case NET_UNKNOWN:
- case NET_UNROUTABLE:
- default:
- switch(ourNet) {
- default: return REACH_DEFAULT;
- case NET_TEREDO: return REACH_TEREDO;
- case NET_IPV6: return REACH_IPV6_WEAK;
- case NET_IPV4: return REACH_IPV4;
- case NET_TOR: return REACH_PRIVATE; // either from Tor, or don't care about our address
- }
- }
-}
-
-void CService::Init()
-{
- port = 0;
-}
-
-CService::CService()
-{
- Init();
-}
-
-CService::CService(const CNetAddr& cip, unsigned short portIn) : CNetAddr(cip), port(portIn)
-{
-}
-
-CService::CService(const struct in_addr& ipv4Addr, unsigned short portIn) : CNetAddr(ipv4Addr), port(portIn)
-{
-}
-
-CService::CService(const struct in6_addr& ipv6Addr, unsigned short portIn) : CNetAddr(ipv6Addr), port(portIn)
-{
-}
-
-CService::CService(const struct sockaddr_in& addr) : CNetAddr(addr.sin_addr), port(ntohs(addr.sin_port))
-{
- assert(addr.sin_family == AF_INET);
-}
-
-CService::CService(const struct sockaddr_in6 &addr) : CNetAddr(addr.sin6_addr, addr.sin6_scope_id), port(ntohs(addr.sin6_port))
-{
- assert(addr.sin6_family == AF_INET6);
-}
-
-bool CService::SetSockAddr(const struct sockaddr *paddr)
-{
- switch (paddr->sa_family) {
- case AF_INET:
- *this = CService(*(const struct sockaddr_in*)paddr);
- return true;
- case AF_INET6:
- *this = CService(*(const struct sockaddr_in6*)paddr);
- return true;
- default:
- return false;
- }
-}
-
-CService::CService(const char *pszIpPort)
-{
- Init();
- CService ip;
- if (Lookup(pszIpPort, ip, 0, false))
- *this = ip;
-}
-
-CService::CService(const char *pszIpPort, int portDefault)
-{
- Init();
- CService ip;
- if (Lookup(pszIpPort, ip, portDefault, false))
- *this = ip;
-}
-
-CService::CService(const std::string &strIpPort)
-{
- Init();
- CService ip;
- if (Lookup(strIpPort.c_str(), ip, 0, false))
- *this = ip;
-}
-
-CService::CService(const std::string &strIpPort, int portDefault)
-{
- Init();
- CService ip;
- if (Lookup(strIpPort.c_str(), ip, portDefault, false))
- *this = ip;
-}
-
-unsigned short CService::GetPort() const
-{
- return port;
-}
-
-bool operator==(const CService& a, const CService& b)
-{
- return (CNetAddr)a == (CNetAddr)b && a.port == b.port;
-}
-
-bool operator!=(const CService& a, const CService& b)
-{
- return (CNetAddr)a != (CNetAddr)b || a.port != b.port;
-}
-
-bool operator<(const CService& a, const CService& b)
-{
- return (CNetAddr)a < (CNetAddr)b || ((CNetAddr)a == (CNetAddr)b && a.port < b.port);
-}
-
-bool CService::GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const
-{
- if (IsIPv4()) {
- if (*addrlen < (socklen_t)sizeof(struct sockaddr_in))
- return false;
- *addrlen = sizeof(struct sockaddr_in);
- struct sockaddr_in *paddrin = (struct sockaddr_in*)paddr;
- memset(paddrin, 0, *addrlen);
- if (!GetInAddr(&paddrin->sin_addr))
- return false;
- paddrin->sin_family = AF_INET;
- paddrin->sin_port = htons(port);
- return true;
- }
- if (IsIPv6()) {
- if (*addrlen < (socklen_t)sizeof(struct sockaddr_in6))
- return false;
- *addrlen = sizeof(struct sockaddr_in6);
- struct sockaddr_in6 *paddrin6 = (struct sockaddr_in6*)paddr;
- memset(paddrin6, 0, *addrlen);
- if (!GetIn6Addr(&paddrin6->sin6_addr))
- return false;
- paddrin6->sin6_scope_id = scopeId;
- paddrin6->sin6_family = AF_INET6;
- paddrin6->sin6_port = htons(port);
- return true;
- }
- return false;
-}
-
-std::vector<unsigned char> CService::GetKey() const
-{
- std::vector<unsigned char> vKey;
- vKey.resize(18);
- memcpy(&vKey[0], ip, 16);
- vKey[16] = port / 0x100;
- vKey[17] = port & 0x0FF;
- return vKey;
-}
-
-std::string CService::ToStringPort() const
-{
- return strprintf("%u", port);
-}
-
-std::string CService::ToStringIPPort() const
-{
- if (IsIPv4() || IsTor()) {
- return ToStringIP() + ":" + ToStringPort();
- } else {
- return "[" + ToStringIP() + "]:" + ToStringPort();
- }
-}
-
-std::string CService::ToString() const
-{
- return ToStringIPPort();
-}
-
-void CService::SetPort(unsigned short portIn)
-{
- port = portIn;
-}
-
-CSubNet::CSubNet():
- valid(false)
-{
- memset(netmask, 0, sizeof(netmask));
-}
-
-CSubNet::CSubNet(const std::string &strSubnet)
+bool LookupSubNet(const char* pszName, CSubNet& ret)
{
+ std::string strSubnet(pszName);
size_t slash = strSubnet.find_last_of('/');
std::vector<CNetAddr> vIP;
- valid = true;
- // Default to /32 (IPv4) or /128 (IPv6), i.e. match single address
- memset(netmask, 255, sizeof(netmask));
-
std::string strAddress = strSubnet.substr(0, slash);
if (LookupHost(strAddress.c_str(), vIP, 1, false))
{
- network = vIP[0];
+ CNetAddr network = vIP[0];
if (slash != strSubnet.npos)
{
std::string strNetmask = strSubnet.substr(slash + 1);
int32_t n;
// IPv4 addresses start at offset 12, and first 12 bytes must match, so just offset n
- const int astartofs = network.IsIPv4() ? 12 : 0;
- if (ParseInt32(strNetmask, &n)) // If valid number, assume /24 symtex
- {
- if(n >= 0 && n <= (128 - astartofs*8)) // Only valid if in range of bits of address
- {
- n += astartofs*8;
- // Clear bits [n..127]
- for (; n < 128; ++n)
- netmask[n>>3] &= ~(1<<(7-(n&7)));
- }
- else
- {
- valid = false;
- }
+ if (ParseInt32(strNetmask, &n)) { // If valid number, assume /24 syntax
+ ret = CSubNet(network, n);
+ return ret.IsValid();
}
else // If not a valid number, try full netmask syntax
{
- if (LookupHost(strNetmask.c_str(), vIP, 1, false)) // Never allow lookup for netmask
- {
- // Copy only the *last* four bytes in case of IPv4, the rest of the mask should stay 1's as
- // we don't want pchIPv4 to be part of the mask.
- for(int x=astartofs; x<16; ++x)
- netmask[x] = vIP[0].ip[x];
- }
- else
- {
- valid = false;
+ // Never allow lookup for netmask
+ if (LookupHost(strNetmask.c_str(), vIP, 1, false)) {
+ ret = CSubNet(network, vIP[0]);
+ return ret.IsValid();
}
}
}
- }
- else
- {
- valid = false;
- }
-
- // Normalize network according to netmask
- for(int x=0; x<16; ++x)
- network.ip[x] &= netmask[x];
-}
-
-CSubNet::CSubNet(const CNetAddr &addr):
- valid(addr.IsValid())
-{
- memset(netmask, 255, sizeof(netmask));
- network = addr;
-}
-
-bool CSubNet::Match(const CNetAddr &addr) const
-{
- if (!valid || !addr.IsValid())
- return false;
- for(int x=0; x<16; ++x)
- if ((addr.ip[x] & netmask[x]) != network.ip[x])
- return false;
- return true;
-}
-
-static inline int NetmaskBits(uint8_t x)
-{
- switch(x) {
- case 0x00: return 0; break;
- case 0x80: return 1; break;
- case 0xc0: return 2; break;
- case 0xe0: return 3; break;
- case 0xf0: return 4; break;
- case 0xf8: return 5; break;
- case 0xfc: return 6; break;
- case 0xfe: return 7; break;
- case 0xff: return 8; break;
- default: return -1; break;
- }
-}
-
-std::string CSubNet::ToString() const
-{
- /* Parse binary 1{n}0{N-n} to see if mask can be represented as /n */
- int cidr = 0;
- bool valid_cidr = true;
- int n = network.IsIPv4() ? 12 : 0;
- for (; n < 16 && netmask[n] == 0xff; ++n)
- cidr += 8;
- if (n < 16) {
- int bits = NetmaskBits(netmask[n]);
- if (bits < 0)
- valid_cidr = false;
else
- cidr += bits;
- ++n;
- }
- for (; n < 16 && valid_cidr; ++n)
- if (netmask[n] != 0x00)
- valid_cidr = false;
-
- /* Format output */
- std::string strNetmask;
- if (valid_cidr) {
- strNetmask = strprintf("%u", cidr);
- } else {
- if (network.IsIPv4())
- strNetmask = strprintf("%u.%u.%u.%u", netmask[12], netmask[13], netmask[14], netmask[15]);
- else
- strNetmask = strprintf("%x:%x:%x:%x:%x:%x:%x:%x",
- netmask[0] << 8 | netmask[1], netmask[2] << 8 | netmask[3],
- netmask[4] << 8 | netmask[5], netmask[6] << 8 | netmask[7],
- netmask[8] << 8 | netmask[9], netmask[10] << 8 | netmask[11],
- netmask[12] << 8 | netmask[13], netmask[14] << 8 | netmask[15]);
+ {
+ ret = CSubNet(network);
+ return ret.IsValid();
+ }
}
-
- return network.ToString() + "/" + strNetmask;
-}
-
-bool CSubNet::IsValid() const
-{
- return valid;
-}
-
-bool operator==(const CSubNet& a, const CSubNet& b)
-{
- return a.valid == b.valid && a.network == b.network && !memcmp(a.netmask, b.netmask, 16);
-}
-
-bool operator!=(const CSubNet& a, const CSubNet& b)
-{
- return !(a==b);
-}
-
-bool operator<(const CSubNet& a, const CSubNet& b)
-{
- return (a.network < b.network || (a.network == b.network && memcmp(a.netmask, b.netmask, 16) < 0));
+ return false;
}
#ifdef WIN32
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-01 12:03:42 +0000