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Updated socket library with isLocalhost and isLocal functions

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This commit is contained in:
Thulinma 2018-07-09 14:56:33 +02:00
parent 1ba76da616
commit bd27540ca8
2 changed files with 47 additions and 27 deletions
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70
lib/socket.cpp
View file

@ -49,6 +49,48 @@ static std::string getIPv6BinAddr(const struct sockaddr_in6 & remoteaddr){
return std::string(tmpBuffer, 16);
}
bool Socket::isLocalhost(const std::string & remotehost){
std::string tmpInput = remotehost;
std::string bf = Socket::getBinForms(tmpInput);
std::string tmpAddr;
while (bf.size() >= 16){
Socket::hostBytesToStr(bf.data(), 16, tmpAddr);
if (isLocal(tmpAddr)){return true;}
bf.erase(0, 17);
}
return false;
}
bool Socket::isLocal(const std::string & remotehost){
struct ifaddrs * ifAddrStruct=NULL;
struct ifaddrs * ifa=NULL;
void * tmpAddrPtr=NULL;
char addressBuffer[INET6_ADDRSTRLEN];
getifaddrs(&ifAddrStruct);
for (ifa = ifAddrStruct; ifa != NULL; ifa = ifa->ifa_next){
if (!ifa->ifa_addr){
continue;
}
if (ifa->ifa_addr->sa_family == AF_INET){// check it is IP4
tmpAddrPtr=&((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
inet_ntop(AF_INET, tmpAddrPtr, addressBuffer, INET_ADDRSTRLEN);
INSANE_MSG("Comparing '%s' to '%s'", remotehost.c_str(), addressBuffer);
if (remotehost == addressBuffer){return true;}
INSANE_MSG("Comparing '%s' to '::ffff:%s'", remotehost.c_str(), addressBuffer);
if (remotehost == std::string("::ffff:") + addressBuffer){return true;}
}else if (ifa->ifa_addr->sa_family == AF_INET6){// check it is IP6
tmpAddrPtr=&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
inet_ntop(AF_INET6, tmpAddrPtr, addressBuffer, INET6_ADDRSTRLEN);
INSANE_MSG("Comparing '%s' to '%s'", remotehost.c_str(), addressBuffer);
if (remotehost == addressBuffer){return true;}
}
}
if (ifAddrStruct!=NULL) freeifaddrs(ifAddrStruct);
return false;
}
/// Helper function that matches two binary-format IPv6 addresses with prefix bits of prefix.
bool Socket::matchIPv6Addr(const std::string &A, const std::string &B, uint8_t prefix){
if (!prefix){prefix = 128;}
@ -804,33 +846,7 @@ bool Socket::Connection::isAddress(const std::string &addr){
}
bool Socket::Connection::isLocal(){
struct ifaddrs * ifAddrStruct=NULL;
struct ifaddrs * ifa=NULL;
void * tmpAddrPtr=NULL;
char addressBuffer[INET6_ADDRSTRLEN];
getifaddrs(&ifAddrStruct);
for (ifa = ifAddrStruct; ifa != NULL; ifa = ifa->ifa_next){
if (!ifa->ifa_addr){
continue;
}
if (ifa->ifa_addr->sa_family == AF_INET){// check it is IP4
tmpAddrPtr=&((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
inet_ntop(AF_INET, tmpAddrPtr, addressBuffer, INET_ADDRSTRLEN);
INSANE_MSG("Comparing '%s' to '%s'", remotehost.c_str(), addressBuffer);
if (remotehost == addressBuffer){return true;}
INSANE_MSG("Comparing '%s' to '::ffff:%s'", remotehost.c_str(), addressBuffer);
if (remotehost == std::string("::ffff:") + addressBuffer){return true;}
}else if (ifa->ifa_addr->sa_family == AF_INET6){// check it is IP6
tmpAddrPtr=&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
inet_ntop(AF_INET6, tmpAddrPtr, addressBuffer, INET6_ADDRSTRLEN);
INSANE_MSG("Comparing '%s' to '%s'", remotehost.c_str(), addressBuffer);
if (remotehost == addressBuffer){return true;}
}
}
if (ifAddrStruct!=NULL) freeifaddrs(ifAddrStruct);
return false;
return Socket::isLocal(remotehost);
}
#ifdef SSL

4
lib/socket.h
View file

@ -37,6 +37,10 @@ namespace Socket{
bool isBinAddress(const std::string &binAddr, std::string matchTo);
bool matchIPv6Addr(const std::string &A, const std::string &B, uint8_t prefix);
std::string getBinForms(std::string addr);
/// Returns true if given human-readable address (address, not hostname) is a local address.
bool isLocal(const std::string & host);
/// Returns true if given human-readable hostname is a local address.
bool isLocalhost(const std::string & host);
/// A buffer made out of std::string objects that can be efficiently read from and written to.
class Buffer{