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NetUtils.h
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NetUtils.h
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/*
* Dynamic Link Exchange Protocol (DLEP)
*
* Copyright (C) 2015, 2016 Massachusetts Institute of Technology
*
* Contributor: Adjacent Link LLC, Bridgewater, NJ
*/
/// @file
/// Various network utility functions.
#ifndef DLEP_NET_UTILS_H
#define DLEP_NET_UTILS_H
#include "DlepCommon.h"
#include "DlepLogger.h"
#include <boost/asio.hpp>
#include <iostream>
namespace LLDLEP
{
namespace internal
{
namespace NetUtils
{
/// Find an IP address on a network interface.
///
/// @param[in] iface_name
/// interface name on which to find an IP address
/// @param[in] want_ipv4_addr
/// If true, find an IPv4 address, else find an IPv6 address.
/// Only link-local IPv6 addresses will be returned.
/// @param[in] logger
/// for logging with the LOG macro
/// @return an IP address that meets the above criteria. If one
/// couldn't be found, the returned IP address's is_unspecified()
// method will return true.
boost::asio::ip::address
get_ip_addr_from_iface(const std::string & iface_name,
bool want_ipv4_addr,
LLDLEP::internal::DlepLoggerPtr logger);
/// Find a network interface given an IP address.
///
/// @param[in] ipaddr
/// IPv4 or IPv6 address to look for
/// @param[in] logger
/// for logging with the LOG macro
/// @return the name of the interface on which \a ipaddr was found,
/// or "" if \a ipaddr was not found on any interface.
std::string get_iface_from_ip_addr(const boost::asio::ip::address & ipaddr,
LLDLEP::internal::DlepLoggerPtr logger);
/// Set a given scope id of a link-local IPv6 address.
///
/// @param[in,out] ipaddr
/// The IPv6 link-local address for which to set the
/// scope ID.
/// @param[in] scope_id
/// the scope id to set in \a ipaddr.
/// @return true if successful, in which case \a ipaddr is
/// modified, else false and \a ipaddr is not modified.
bool set_ipv6_scope_id(boost::asio::ip::address & ipaddr,
unsigned long scope_id);
/// Set the scope id of a link-local IPv6 address from an interface name.
///
/// @param[in,out] ipaddr
/// The IPv6 link-local address for which to set the
/// scope ID.
/// @param[in] iface_name
/// the network interface name used to set the
/// scope id in \a ipaddr. The interface's index
/// is determined and used as the scope id.
/// @return true if successful, in which caSE \a ipaddr is modified,
/// else false and \a ipaddr is not modified.
bool set_ipv6_scope_id(boost::asio::ip::address & ipaddr,
const std::string & iface_name);
bool ipv4ToEtherMacAddr(const boost::asio::ip::address & addr,
LLDLEP::DlepMac & mac,
std::string & ifname,
std::ostringstream & errMessage);
} // namespace NetUtils
} // namespace internal
} // namespace LLDLEP
#endif