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//
// Copyright 2010-2011 Ettus Research LLC
// Copyright 2018 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: GPL-3.0-or-later
//
#include <uhd/transport/if_addrs.hpp>
#include <boost/asio/ip/address_v4.hpp>
#include <stdint.h>
#include <iostream>
/***********************************************************************
* Interface address discovery through ifaddrs api
**********************************************************************/
#ifdef HAVE_GETIFADDRS
#include <ifaddrs.h>
static boost::asio::ip::address_v4 sockaddr_to_ip_addr(sockaddr *addr){
return boost::asio::ip::address_v4(ntohl(
reinterpret_cast<sockaddr_in*>(addr)->sin_addr.s_addr
));
}
std::vector<uhd::transport::if_addrs_t> uhd::transport::get_if_addrs(void){
std::vector<if_addrs_t> if_addrs;
struct ifaddrs *ifap;
if (getifaddrs(&ifap) == 0){
for (struct ifaddrs *iter = ifap; iter != nullptr; iter = iter->ifa_next){
//ensure that the entries are valid
if (iter->ifa_addr == nullptr) continue;
if (iter->ifa_addr->sa_family != AF_INET) continue;
if (iter->ifa_netmask->sa_family != AF_INET) continue;
if (iter->ifa_broadaddr->sa_family != AF_INET) continue;
//append a new set of interface addresses
if_addrs_t if_addr;
if_addr.inet = sockaddr_to_ip_addr(iter->ifa_addr).to_string();
if_addr.mask = sockaddr_to_ip_addr(iter->ifa_netmask).to_string();
if_addr.bcast = sockaddr_to_ip_addr(iter->ifa_broadaddr).to_string();
//correct the bcast address when its same as the gateway
if (if_addr.inet == if_addr.bcast or sockaddr_to_ip_addr(iter->ifa_broadaddr) == boost::asio::ip::address_v4(0)){
//manually calculate broadcast address
//https://svn.boost.org/trac/boost/ticket/5198
const uint32_t addr = sockaddr_to_ip_addr(iter->ifa_addr).to_ulong();
const uint32_t mask = sockaddr_to_ip_addr(iter->ifa_netmask).to_ulong();
const uint32_t bcast = (addr & mask) | ~mask;
if_addr.bcast = boost::asio::ip::address_v4(bcast).to_string();
}
if_addrs.push_back(if_addr);
}
freeifaddrs(ifap);
}
return if_addrs;
}
#endif /* HAVE_GETIFADDRS */
/***********************************************************************
* Interface address discovery through windows api
**********************************************************************/
#ifdef HAVE_SIO_GET_INTERFACE_LIST
#include <winsock2.h>
std::vector<uhd::transport::if_addrs_t> uhd::transport::get_if_addrs(void){
std::vector<if_addrs_t> if_addrs;
SOCKET sd = WSASocket(AF_INET, SOCK_DGRAM, 0, 0, 0, 0);
if (sd == SOCKET_ERROR) {
std::cerr << "Failed to get a socket. Error " << WSAGetLastError() <<
std::endl; return if_addrs;
}
INTERFACE_INFO InterfaceList[20];
unsigned long nBytesReturned;
if (WSAIoctl(sd, SIO_GET_INTERFACE_LIST, 0, 0, &InterfaceList,
sizeof(InterfaceList), &nBytesReturned, 0, 0) == SOCKET_ERROR) {
std::cerr << "Failed calling WSAIoctl: error " << WSAGetLastError() <<
std::endl;
return if_addrs;
}
int nNumInterfaces = nBytesReturned / sizeof(INTERFACE_INFO);
for (int i = 0; i < nNumInterfaces; ++i) {
uint32_t iiAddress = ntohl(reinterpret_cast<sockaddr_in&>(InterfaceList[i].iiAddress).sin_addr.s_addr);
uint32_t iiNetmask = ntohl(reinterpret_cast<sockaddr_in&>(InterfaceList[i].iiNetmask).sin_addr.s_addr);
uint32_t iiBroadcastAddress = (iiAddress & iiNetmask) | ~iiNetmask;
if_addrs_t if_addr;
if_addr.inet = boost::asio::ip::address_v4(iiAddress).to_string();
if_addr.mask = boost::asio::ip::address_v4(iiNetmask).to_string();
if_addr.bcast = boost::asio::ip::address_v4(iiBroadcastAddress).to_string();
if_addrs.push_back(if_addr);
}
return if_addrs;
}
#endif /* HAVE_SIO_GET_INTERFACE_LIST */
/***********************************************************************
* Interface address discovery not included
**********************************************************************/
#ifdef HAVE_IF_ADDRS_DUMMY
std::vector<uhd::transport::if_addrs_t> uhd::transport::get_if_addrs(void){
return std::vector<if_addrs_t>();
}
#endif /* HAVE_IF_ADDRS_DUMMY */
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