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/*
* Copyright (c) 2017, Matias Fontanini
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
*
* 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
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <tins/utils/resolve_utils.h>
#ifndef _WIN32
#if defined(BSD) || defined(__FreeBSD_kernel__)
#include <sys/socket.h>
#include <netinet/in.h>
#else
#include <netpacket/packet.h>
#endif
#include <ifaddrs.h>
#include <netdb.h>
#include <net/if.h>
#ifdef __ANDROID_API__
#include <linux/in.h>
#include <linux/in6.h>
#endif
#else
#include <winsock2.h>
#include <ws2tcpip.h>
#include <iphlpapi.h>
#undef interface
#endif
#include <tins/exceptions.h>
#include <tins/ip_address.h>
#include <tins/ipv6_address.h>
#include <tins/hw_address.h>
#include <tins/ethernetII.h>
#include <tins/arp.h>
#include <tins/packet_sender.h>
#include <tins/network_interface.h>
#include <tins/detail/smart_ptr.h>
using std::string;
/** \cond */
addrinfo* resolve_domain(const string& to_resolve, int family) {
addrinfo* result, hints = addrinfo();
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
hints.ai_family = family;
if (!getaddrinfo(to_resolve.c_str(), 0, &hints, &result)) {
return result;
}
else {
throw Tins::exception_base("Could not resolve address");
}
}
/** \endcond */
namespace Tins {
namespace Utils {
IPv4Address resolve_domain(const string& to_resolve) {
addrinfo* result = ::resolve_domain(to_resolve, AF_INET);
IPv4Address addr(((sockaddr_in*)result->ai_addr)->sin_addr.s_addr);
freeaddrinfo(result);
return addr;
}
IPv6Address resolve_domain6(const string& to_resolve) {
addrinfo* result = ::resolve_domain(to_resolve, AF_INET6);
IPv6Address addr((const uint8_t*)&((sockaddr_in6*)result->ai_addr)->sin6_addr);
freeaddrinfo(result);
return addr;
}
HWAddress<6> resolve_hwaddr(const NetworkInterface& iface,
IPv4Address ip,
PacketSender& sender) {
NetworkInterface::Info info(iface.addresses());
#ifdef _WIN32
// On Windows, use SendARP
IPAddr source;
IPAddr dest;
ULONG hw_address[2];
ULONG address_length = 6;
source = static_cast<uint32_t>(info.ip_addr);
dest = static_cast<uint32_t>(ip);
if (SendARP(dest, source, &hw_address, &address_length) == NO_ERROR && address_length == 6) {
return HWAddress<6>((const uint8_t*)hw_address);
}
#else
// On other platforms, just do the ARP resolution ourselves
EthernetII packet = ARP::make_arp_request(ip, info.ip_addr, info.hw_addr);
Internals::smart_ptr<PDU>::type response(sender.send_recv(packet, iface));
if (response.get()) {
const ARP* arp_resp = response->find_pdu<ARP>();
if (arp_resp) {
return arp_resp->sender_hw_addr();
}
}
#endif
throw exception_base("Could not resolve hardware address");
}
HWAddress<6> resolve_hwaddr(IPv4Address ip, PacketSender& sender) {
return resolve_hwaddr(sender.default_interface(), ip, sender);
}
} // Utils
} // Tins
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