inet.h

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/*
BSD 3-Clause License
 
Copyright (c) 2022, Stable Cloud Computing, Inc.
 
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
 
1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
 
2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.
 
3. Neither the name of the copyright holder nor the names of its
   contributors may be used to endorse or promote products derived from
   this software without specific prior written permission.
 
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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*/
#ifndef _SCC_NET_INET_H
#define _SCC_NET_INET_H
 
#include <string>
#include <cstdint>
#include <memory>
#include <net/socket.h>
 
// forward declarations
struct sockaddr;
struct sockaddr_in6;
 
namespace scc::net {
 
enum InetAddrFlag
{
    prot_mask=      0xf,                
    ipv4=           0x1,                
    ipv6=           0x2,                
 
    type_mask=      0xf0,               
    any=            0x10,               
    loopback=       0x20,               
    unicast=        0x40,               
    multicast=      0x80,               
 
    scope_mask=     0xff00,             
    if_local=       0x0100,             
    link_local=     0x0200,             
    realm_local=    0x0400,             
    admin_local=    0x0800,             
    site_local=     0x1000,             
    org_local=      0x2000,             
    global=         0x4000,             
 
    mcast_flags_mask=       0xf0000,        
    mcast_rendezvous =      0x10000,        
    mcast_prefix=           0x20000,        
    mcast_dynamic=          0x40000,        
    
    mcast_reserved_mask=    0xff00000,      
    mcast_all_nodes=        0x0100000,      
    mcast_all_routers=      0x0200000,      
 
    unicast_special_mask=   0xf0000000,     
    unique_local_address =  0x10000000,     
};
 
class InetAddr : public SockaddrBase
{
    sockaddr_in6* m_addr;
 
    void init();
 
public:
    InetAddr();
    InetAddr(unsigned);
    InetAddr(const std::string&, unsigned);
    InetAddr(const sockaddr*);
    InetAddr(const InetAddr&);
    InetAddr& operator=(const InetAddr&);
    InetAddr(InetAddr&&);
    InetAddr& operator=(InetAddr&&);
    virtual ~InetAddr();
 
    virtual operator const sockaddr*() const;
    virtual operator sockaddr*();
    virtual unsigned len() const;
    virtual std::string str() const;
    virtual std::string host() const;
 
    operator const sockaddr_in6*() const { return m_addr; }
 
    void any_host();
    void local_host();
    void host(const std::string&);
    unsigned port() const;
    void port(unsigned);
    void scope_id(uint32_t);
    uint32_t scope_id() const;
 
    int flags() const;
    bool test_flags(int f) const
    {
        return (flags() & f) == f;
    }
};
 
class InetTcpSock : public TcpSocket
{
protected:
    explicit InetTcpSock(int fd) : TcpSocket(fd) {}
 
public:
    InetTcpSock();
    
    virtual void reset();
    InetAddr get_addr();
 
    InetTcpSock accept();
    std::shared_ptr<InetTcpSock> accept_shared();
    InetTcpSock accept(InetAddr&);
    std::shared_ptr<InetTcpSock> accept_shared(InetAddr&);
};
 
class InetUdpSock : public UdpSocket
{
public:
    InetUdpSock();
 
    virtual void reset();
 
    InetAddr get_addr();
 
    void mcast_join_group(const InetAddr&, unsigned = 0);
    void mcast_leave_group(const InetAddr&, unsigned = 0);
    void mcast_interface(unsigned = 0);
    void mcast_loopback(bool = true);
    void mcast_hops(unsigned = 1);
};
 
}   // namespace
 
std::ostream& operator<<(std::ostream&, const scc::net::InetAddr&);
 
#endif