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/******************************************************************************
* Copyright (c) 2000-2021 Ericsson Telecom AB
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.html
*
* Contributors:
* Balasko, Jeno
* Beres, Szabolcs
* Kovacs, Ferenc
* Raduly, Csaba
*
******************************************************************************/
#ifndef NETWORKHANDLER_H_
#define NETWORKHANDLER_H_
#include "platform.h"
// platform.h includes sys/socket.h
#include <netinet/in.h>
#include <netdb.h>
#include <string.h>
#ifdef WIN32
#include <cygwin/version.h>
#if CYGWIN_VERSION_DLL_MAJOR >= 1007
#define CYGWIN17
#else
#define CYGWIN15
#endif
#endif
// For legacy (e.g. Solaris 6) systems.
#ifndef INET_ADDRSTRLEN
#define INET_ADDRSTRLEN 16
#endif
#ifndef INET6_ADDRSTRLEN
#define INET6_ADDRSTRLEN 46
#endif
#ifndef NI_MAXHOST
#define NI_MAXHOST 1025
#endif
typedef enum { ipv0 = -1, ipv4 = 0, ipv6 } NetworkFamily;
class Text_Buf;
class IPAddress;
class IPv4Address;
#if defined(LINUX) || defined(CYGWIN17)
class IPV6Address;
#endif
class NetworkHandler;
class HCNetworkHandler;
class IPAddress {
public:
virtual ~IPAddress() = 0;
static IPAddress *create_addr(const NetworkFamily& p_family);
static IPAddress *create_addr(const char *p_addr);
// Always return something.
virtual const char *get_host_str() const = 0;
virtual const char *get_addr_str() const = 0;
virtual bool operator==(const IPAddress& p_addr) const = 0;
virtual bool operator!=(const IPAddress& p_addr) const = 0;
virtual IPAddress& operator=(const IPAddress& p_addr) = 0;
// Encode and decode the address and the corresponding port for internal
// communication. Used by connected ports.
virtual void push_raw(Text_Buf& p_buf) const = 0;
virtual void pull_raw(Text_Buf& p_buf) = 0;
virtual void clean_up() = 0;
virtual int accept(int p_sockfd) = 0;
// Return the current address and port to which the socket is bound to.
virtual int getsockname(int p_sockfd) = 0;
virtual unsigned short get_port() const = 0;
virtual void set_port(unsigned short p_port) = 0;
virtual bool set_addr(const char *p_addr, unsigned short p_port = 0) = 0;
virtual const struct sockaddr *get_addr() const = 0;
virtual socklen_type get_addr_len() const = 0;
virtual bool is_local() const = 0;
};
class IPv4Address : public IPAddress {
public:
IPv4Address();
// Does DNS lookup.
IPv4Address(const char *p_addr, unsigned short p_port = 0 /* Any port. */);
//IPv4Address(const IPv4Address& p_addr) = default;
//There are no pointers, so the compiler generated copy is OK.
~IPv4Address();
bool operator==(const IPAddress& p_addr) const;
bool operator!=(const IPAddress& p_addr) const;
IPv4Address& operator=(const IPAddress& p_addr);
void push_raw(Text_Buf& p_buf) const;
void pull_raw(Text_Buf& p_buf);
void clean_up();
int accept(int p_sockfd);
int getsockname(int p_sockfd);
inline unsigned short get_port() const { return ntohs(m_addr.sin_port); }
inline void set_port(unsigned short p_port) { m_addr.sin_port = htons(p_port); }
bool set_addr(const char *p_addr, unsigned short p_port = 0);
inline const struct sockaddr *get_addr() const { return reinterpret_cast<const struct sockaddr *>(&m_addr); }
inline socklen_type get_addr_len() const { return sizeof(m_addr); }
inline const char *get_host_str() const { return strlen(m_host_str) > 0 ? m_host_str : m_addr_str; }
inline const char *get_addr_str() const { return strlen(m_addr_str) > 0 ? m_addr_str : m_host_str; }
static bool is_valid(const char *p_addr);
bool is_local() const;
private:
sockaddr_in m_addr;
char m_host_str[NI_MAXHOST]; // DNS name.
char m_addr_str[INET_ADDRSTRLEN]; // Address in numeric format.
};
#if defined(LINUX) || defined(CYGWIN17)
class IPv6Address : public IPAddress {
public:
IPv6Address();
// Does DNS lookup.
IPv6Address(const char *p_addr, unsigned short p_port = 0 /* Any port. */);
//IPv6Address(const IPv6Address& p_addr) = default;
//There are no pointers, so the compiler generated copy is OK.
~IPv6Address();
bool operator==(const IPAddress& p_addr) const;
bool operator!=(const IPAddress& p_addr) const;
IPv6Address& operator=(const IPAddress& p_addr);
void push_raw(Text_Buf& p_buf) const;
void pull_raw(Text_Buf& p_buf);
void clean_up();
int accept(int p_sockfd);
int getsockname(int p_sockfd);
inline unsigned short get_port() const { return ntohs(m_addr.sin6_port); }
inline void set_port(unsigned short p_port) { m_addr.sin6_port = htons(p_port); }
bool set_addr(const char *p_addr, unsigned short p_port = 0);
inline const struct sockaddr *get_addr() const { return reinterpret_cast<const struct sockaddr *>(&m_addr); }
inline socklen_type get_addr_len() const { return sizeof(m_addr); }
inline const char *get_host_str() const { return strlen(m_host_str) > 0 ? m_host_str : m_addr_str; }
const char *get_addr_str() const;
static bool is_valid(const char *p_addr);
bool is_local() const;
private:
sockaddr_in6 m_addr;
char m_host_str[NI_MAXHOST]; // DNS name.
char m_addr_str[INET6_ADDRSTRLEN]; // Address in numeric format.
};
#endif // LINUX || CYGWIN17
class NetworkHandler {
public:
NetworkHandler();
NetworkHandler(const NetworkFamily& p_family);
NetworkHandler(const char *p_addr);
inline void set_family(const NetworkFamily& p_family) { m_family = p_family; }
void set_family(const char *p_addr);
inline const NetworkFamily& get_family() const { return m_family; }
int socket();
static int socket(const NetworkFamily& p_family);
private:
NetworkHandler(const NetworkHandler& p_handler);
NetworkHandler& operator=(const NetworkHandler& p_handler);
protected:
NetworkFamily m_family;
};
class HCNetworkHandler : public NetworkHandler {
public:
HCNetworkHandler();
~HCNetworkHandler();
bool set_local_addr(const char *p_addr, unsigned short p_port = 0 /* Any port. */);
bool set_mc_addr(const char *p_addr, unsigned short p_port = 0 /* Any port. */);
int getsockname_local_addr(int p_sockfd);
int bind_local_addr(int p_sockfd) const;
int connect_to_mc(int p_sockfd) const;
inline const char *get_mc_host_str() const { return m_mc_addr->get_host_str(); }
inline const char *get_mc_addr_str() const { return m_mc_addr->get_addr_str(); }
inline const char *get_local_host_str() const { return m_local_addr->get_host_str(); }
inline const char *get_local_addr_str() const { return m_local_addr->get_addr_str(); }
inline IPAddress *get_mc_addr() const { return m_mc_addr; }
inline IPAddress *get_local_addr() const { return m_local_addr; }
inline unsigned short get_mc_port() const { return m_mc_addr->get_port(); }
inline unsigned short get_local_port() const { return m_local_addr->get_port(); }
private:
HCNetworkHandler(const HCNetworkHandler& p_handler);
HCNetworkHandler& operator=(const HCNetworkHandler& p_handler);
IPAddress *m_mc_addr;
IPAddress *m_local_addr;
};
#endif // NETWORKHANDLER_H_
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