core: add free function to enumerate network interfaces.
Change-Id: Icd89662afe9e1295cd18a615970c5b4299529b38
Refs: #1306
diff --git a/daemon/core/network-interface.cpp b/daemon/core/network-interface.cpp
new file mode 100644
index 0000000..65a690c
--- /dev/null
+++ b/daemon/core/network-interface.cpp
@@ -0,0 +1,109 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (C) 2014 Named Data Networking Project
+ * See COPYING for copyright and distribution information.
+ */
+
+#include "network-interface.hpp"
+
+#include <boost/foreach.hpp>
+
+#include <arpa/inet.h> // for inet_ntop()
+#include <netinet/in.h> // for struct sockaddr_in{,6}
+#include <ifaddrs.h> // for getifaddrs()
+
+#if defined(__linux__)
+#include <net/if_arp.h> // for ARPHRD_* constants
+#include <netpacket/packet.h> // for struct sockaddr_ll
+#elif defined(__APPLE__)
+#include <net/if_dl.h> // for struct sockaddr_dl
+#else
+#error Platform not supported
+#endif
+
+namespace nfd {
+
+NFD_LOG_INIT("NetworkInterfaceInfo")
+
+std::list< shared_ptr<NetworkInterfaceInfo> >
+listNetworkInterfaces()
+{
+ typedef std::map< std::string, shared_ptr<NetworkInterfaceInfo> > InterfacesMap;
+ InterfacesMap ifmap;
+
+ ifaddrs* ifa_list;
+ if (::getifaddrs(&ifa_list) < 0)
+ throw std::runtime_error("getifaddrs() failed");
+
+ for (ifaddrs* ifa = ifa_list; ifa != 0; ifa = ifa->ifa_next)
+ {
+ shared_ptr<NetworkInterfaceInfo> netif;
+ std::string ifname(ifa->ifa_name);
+ InterfacesMap::iterator i = ifmap.find(ifname);
+ if (i == ifmap.end())
+ {
+ netif = make_shared<NetworkInterfaceInfo>();
+ netif->name = ifname;
+ netif->flags = ifa->ifa_flags;
+ ifmap[ifname] = netif;
+ }
+ else
+ {
+ netif = i->second;
+ }
+
+ if (!ifa->ifa_addr)
+ continue;
+
+ switch (ifa->ifa_addr->sa_family)
+ {
+ case AF_INET: {
+ const sockaddr_in* sin = reinterpret_cast<sockaddr_in*>(ifa->ifa_addr);
+ char address[INET_ADDRSTRLEN];
+ if (::inet_ntop(AF_INET, &sin->sin_addr, address, sizeof(address)))
+ netif->ipv4Addresses.push_back(boost::asio::ip::address_v4::from_string(address));
+ else
+ NFD_LOG_WARN("inet_ntop() failed on " << ifname);
+ }
+ break;
+ case AF_INET6: {
+ const sockaddr_in6* sin6 = reinterpret_cast<sockaddr_in6*>(ifa->ifa_addr);
+ char address[INET6_ADDRSTRLEN];
+ if (::inet_ntop(AF_INET6, &sin6->sin6_addr, address, sizeof(address)))
+ netif->ipv6Addresses.push_back(boost::asio::ip::address_v6::from_string(address));
+ else
+ NFD_LOG_WARN("inet_ntop() failed on " << ifname);
+ }
+ break;
+#if defined(__linux__)
+ case AF_PACKET: {
+ const sockaddr_ll* sll = reinterpret_cast<sockaddr_ll*>(ifa->ifa_addr);
+ netif->index = sll->sll_ifindex;
+ if (sll->sll_hatype == ARPHRD_ETHER && sll->sll_halen == ethernet::ADDR_LEN)
+ netif->etherAddress = ethernet::Address(sll->sll_addr);
+ else if (sll->sll_hatype != ARPHRD_LOOPBACK)
+ NFD_LOG_WARN("Unrecognized hardware address on " << ifname);
+ }
+ break;
+#elif defined(__APPLE__)
+ case AF_LINK: {
+ const sockaddr_dl* sdl = reinterpret_cast<sockaddr_dl*>(ifa->ifa_addr);
+ netif->index = sdl->sdl_index;
+ netif->etherAddress = ethernet::Address(reinterpret_cast<uint8_t*>(LLADDR(sdl)));
+ }
+ break;
+#endif
+ }
+ }
+
+ ::freeifaddrs(ifa_list);
+
+ std::list< shared_ptr<NetworkInterfaceInfo> > list;
+ BOOST_FOREACH(InterfacesMap::value_type elem, ifmap) {
+ list.push_back(elem.second);
+ }
+
+ return list;
+}
+
+} // namespace nfd
diff --git a/daemon/core/network-interface.hpp b/daemon/core/network-interface.hpp
new file mode 100644
index 0000000..d02171a
--- /dev/null
+++ b/daemon/core/network-interface.hpp
@@ -0,0 +1,60 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (C) 2014 Named Data Networking Project
+ * See COPYING for copyright and distribution information.
+ */
+
+#ifndef NFD_CORE_NETWORK_INTERFACE_HPP
+#define NFD_CORE_NETWORK_INTERFACE_HPP
+
+#include "common.hpp"
+#include "face/ethernet.hpp"
+
+#include <net/if.h>
+
+namespace nfd {
+
+class NetworkInterfaceInfo
+{
+public:
+ int index;
+ std::string name;
+ ethernet::Address etherAddress;
+ std::vector<boost::asio::ip::address_v4> ipv4Addresses;
+ std::vector<boost::asio::ip::address_v6> ipv6Addresses;
+ unsigned int flags;
+
+ bool
+ isLoopback() const;
+
+ bool
+ isMulticastCapable() const;
+
+ bool
+ isUp() const;
+};
+
+inline bool
+NetworkInterfaceInfo::isLoopback() const
+{
+ return (flags & IFF_LOOPBACK) != 0;
+}
+
+inline bool
+NetworkInterfaceInfo::isMulticastCapable() const
+{
+ return (flags & IFF_MULTICAST) != 0;
+}
+
+inline bool
+NetworkInterfaceInfo::isUp() const
+{
+ return (flags & IFF_UP) != 0;
+}
+
+std::list< shared_ptr<NetworkInterfaceInfo> >
+listNetworkInterfaces();
+
+} // namespace nfd
+
+#endif // NFD_CORE_NETWORK_INTERFACE_HPP