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/* $Id$ */
/** @file core/address.h Wrapper for network addresses. */
#ifndef NETWORK_ADDRESS_H
#define NETWORK_ADDRESS_H
#ifdef ENABLE_NETWORK
#include "os_abstraction.h"
/**
* Wrapper for (un)resolved network addresses; there's no reason to transform
* a numeric IP to a string and then back again to pass it to functions. It
* furthermore allows easier delaying of the hostname lookup.
*/
class NetworkAddress {
private:
char *hostname; ///< The hostname, NULL if there isn't one
size_t address_length; ///< The length of the resolved address
sockaddr_storage address; ///< The resolved address
/**
* Helper function to resolve something to a socket.
* @param runp information about the socket to try not
* @return the opened socket or INVALID_SOCKET
*/
typedef SOCKET (*LoopProc)(addrinfo *runp);
/**
* Resolve this address into a socket
* @param family the type of 'protocol' (IPv4, IPv6)
* @param socktype the type of socket (TCP, UDP, etc)
* @param flags the flags to send to getaddrinfo
* @param func the inner working while looping over the address info
* @return the resolved socket or INVALID_SOCKET.
*/
SOCKET Resolve(int family, int socktype, int flags, LoopProc func);
public:
/**
* Create a network address based on a resolved IP and port
* @param ip the resolved ip
* @param port the port
*/
NetworkAddress(in_addr_t ip, uint16 port) :
hostname(NULL),
address_length(sizeof(sockaddr))
{
memset(&this->address, 0, sizeof(this->address));
this->address.ss_family = AF_INET;
((struct sockaddr_in*)&this->address)->sin_addr.s_addr = ip;
this->SetPort(port);
}
/**
* Create a network address based on a resolved IP and port
* @param address the IP address with port
*/
NetworkAddress(struct sockaddr_storage &address, size_t address_length) :
hostname(NULL),
address_length(address_length),
address(address)
{
}
/**
* Create a network address based on a resolved IP and port
* @param address the IP address with port
*/
NetworkAddress(sockaddr *address, size_t address_length) :
hostname(NULL),
address_length(address_length)
{
memset(&this->address, 0, sizeof(this->address));
memcpy(&this->address, address, address_length);
}
/**
* Create a network address based on a unresolved host and port
* @param ip the unresolved hostname
* @param port the port
* @param family the address family
*/
NetworkAddress(const char *hostname = "0.0.0.0", uint16 port = 0, int family = AF_INET) :
hostname(strdup(hostname)),
address_length(0)
{
memset(&this->address, 0, sizeof(this->address));
this->address.ss_family = family;
this->SetPort(port);
}
/**
* Make a clone of another address
* @param address the address to clone
*/
NetworkAddress(const NetworkAddress &address) :
hostname(address.hostname == NULL ? NULL : strdup(address.hostname)),
address_length(address.address_length),
address(address.address)
{
}
/** Clean up our mess */
~NetworkAddress()
{
free(hostname);
}
/**
* Get the hostname; in case it wasn't given the
* IPv4 dotted representation is given.
* @return the hostname
*/
const char *GetHostname();
/**
* Get the address as a string, e.g. 127.0.0.1:12345.
* @return the address
*/
const char *GetAddressAsString();
/**
* Get the address in it's internal representation.
* @return the address
*/
const sockaddr_storage *GetAddress();
/**
* Get the (valid) length of the address.
* @return the length
*/
size_t GetAddressLength()
{
/* Resolve it if we didn't do it already */
if (!this->IsResolved()) this->GetAddress();
return this->address_length;
}
/**
* Get the port
* @return the port
*/
uint16 GetPort() const;
/**
* Set the port
* @param port set the port number
*/
void SetPort(uint16 port);
/**
* Check whether the IP address has been resolved already
* @return true iff the port has been resolved
*/
bool IsResolved() const
{
return this->address_length != 0;
}
/**
* Compare the address of this class with the address of another.
* @param address the other address.
*/
bool operator == (NetworkAddress &address)
{
if (this->IsResolved() && address.IsResolved()) return memcmp(&this->address, &address.address, sizeof(this->address)) == 0;
return this->GetPort() == address.GetPort() && strcmp(this->GetHostname(), address.GetHostname()) == 0;
}
/**
* Compare the address of this class with the address of another.
* @param address the other address.
*/
bool operator < (NetworkAddress &address)
{
int r = this->address.ss_family - address.address.ss_family;
if (r == 0 && this->IsResolved() && address.IsResolved()) {
r = this->address_length - address.address_length;
if (r == 0) r = memcmp(&this->address, &address.address, this->address_length) == 0;
} else {
r = strcmp(this->GetHostname(), address.GetHostname());
}
if (r == 0) r = this->GetPort() - address.GetPort();
return r < 0;
}
/**
* Assign another address to ourself
* @param other obviously the address to assign to us
* @return 'this'
*/
NetworkAddress& operator = (const NetworkAddress &other)
{
if (this != &other) { // protect against invalid self-assignment
free(this->hostname);
memcpy(this, &other, sizeof(*this));
if (other.hostname != NULL) this->hostname = strdup(other.hostname);
}
return *this;
}
/**
* Connect to the given address.
* @return the connected socket or INVALID_SOCKET.
*/
SOCKET Connect();
/**
* Make the given socket listen.
* @param family the type of 'protocol' (IPv4, IPv6)
* @param socktype the type of socket (TCP, UDP, etc)
* @return the listening socket or INVALID_SOCKET.
*/
SOCKET Listen(int family, int socktype);
};
#endif /* ENABLE_NETWORK */
#endif /* NETWORK_ADDRESS_H */
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