void PacketSender::close_socket(SocketType type, const NetworkInterface &iface) {
if(type == ETHER_SOCKET) {
#if defined(BSD) || defined(__FreeBSD_kernel__)
BSDEtherSockets::iterator it = _ether_socket.find(iface.id());
if(it == _ether_socket.end())
throw invalid_socket_type();
if(::close(it->second) == -1)
throw socket_close_error(make_error_string());
_ether_socket.erase(it);
#elif !defined(WIN32)
if(_ether_socket == INVALID_RAW_SOCKET)
throw invalid_socket_type();
if(::close(_ether_socket) == -1)
throw socket_close_error(make_error_string());
_ether_socket = INVALID_RAW_SOCKET;
#endif
}
else {
if(type >= SOCKETS_END || _sockets[type] == INVALID_RAW_SOCKET)
throw invalid_socket_type();
#ifndef WIN32
if(close(_sockets[type]) == -1)
throw socket_close_error(make_error_string());
#else
closesocket(_sockets[type]);
#endif
_sockets[type] = INVALID_RAW_SOCKET;
}
}
void RadioTap::send(PacketSender &sender, const NetworkInterface &iface) {
if(!iface)
throw invalid_interface();
#if !defined(BSD) && !defined(__FreeBSD_kernel__)
struct sockaddr_ll addr;
memset(&addr, 0, sizeof(struct sockaddr_ll));
addr.sll_family = Endian::host_to_be<uint16_t>(PF_PACKET);
addr.sll_protocol = Endian::host_to_be<uint16_t>(ETH_P_ALL);
addr.sll_halen = 6;
addr.sll_ifindex = iface.id();
const Tins::Dot11 *wlan = tins_cast<Tins::Dot11*>(inner_pdu());
if(wlan) {
Tins::Dot11::address_type dot11_addr(wlan->addr1());
std::copy(dot11_addr.begin(), dot11_addr.end(), addr.sll_addr);
}
sender.send_l2(*this, (struct sockaddr*)&addr, (uint32_t)sizeof(addr));
#else
sender.send_l2(*this, 0, 0, iface);
#endif
}
void PacketSender::open_l2_socket(const NetworkInterface& iface) {
#if defined(BSD) || defined(__FreeBSD_kernel__)
int sock = -1;
// At some point, there should be an available device
for (int i = 0; sock == -1;i++) {
std::ostringstream oss;
oss << "/dev/bpf" << i;
sock = open(oss.str().c_str(), O_RDWR);
}
if(sock == -1)
throw socket_open_error(make_error_string());
struct ifreq ifr;
strncpy(ifr.ifr_name, iface.name().c_str(), sizeof(ifr.ifr_name) - 1);
if(ioctl(sock, BIOCSETIF, (caddr_t)&ifr) < 0) {
::close(sock);
throw socket_open_error(make_error_string());
}
_ether_socket[iface.id()] = sock;
#else
if (_ether_socket == INVALID_RAW_SOCKET) {
_ether_socket = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
if (_ether_socket == -1)
throw socket_open_error(make_error_string());
}
#endif
}
bool PacketSender::ether_socket_initialized(const NetworkInterface& iface) const {
#if defined(BSD) || defined(__FreeBSD_kernel__)
return _ether_socket.count(iface.id());
#else
return _ether_socket != INVALID_RAW_SOCKET;
#endif
}
int PacketSender::get_ether_socket(const NetworkInterface& iface) {
if(!ether_socket_initialized(iface))
open_l2_socket(iface);
#if defined(BSD) || defined(__FreeBSD_kernel__)
return _ether_socket[iface.id()];
#else
return _ether_socket;
#endif
}
void Dot11::send(PacketSender &sender, const NetworkInterface &iface) {
if(!iface)
throw invalid_interface();
#if !defined(BSD) && !defined(__FreeBSD_kernel__)
sockaddr_ll addr;
memset(&addr, 0, sizeof(struct sockaddr_ll));
addr.sll_family = Endian::host_to_be<uint16_t>(PF_PACKET);
addr.sll_protocol = Endian::host_to_be<uint16_t>(ETH_P_ALL);
addr.sll_halen = 6;
addr.sll_ifindex = iface.id();
memcpy(&(addr.sll_addr), _header.addr1, 6);
sender.send_l2(*this, (struct sockaddr*)&addr, (uint32_t)sizeof(addr));
#else
sender.send_l2(*this, 0, 0, iface);
#endif
}
void EthernetII::send(PacketSender &sender, const NetworkInterface &iface) {
if(!iface)
throw invalid_interface();
#if defined(HAVE_PACKET_SENDER_PCAP_SENDPACKET) || defined(BSD) || defined(__FreeBSD_kernel__)
// Sending using pcap_sendpacket/BSD bpf packet mode is the same here
sender.send_l2(*this, 0, 0, iface);
#elif defined(WIN32)
// On Windows we can only send l2 PDUs using pcap_sendpacket
throw std::runtime_error("LIBTINS_USE_PCAP_SENDPACKET is not enabled");
#else
// Default GNU/Linux behaviour
struct sockaddr_ll addr;
memset(&addr, 0, sizeof(struct sockaddr_ll));
addr.sll_family = Endian::host_to_be<uint16_t>(PF_PACKET);
addr.sll_protocol = Endian::host_to_be<uint16_t>(ETH_P_ALL);
addr.sll_halen = address_type::address_size;
addr.sll_ifindex = iface.id();
memcpy(&(addr.sll_addr), _eth.dst_mac, address_type::address_size);
sender.send_l2(*this, (struct sockaddr*)&addr, (uint32_t)sizeof(addr));
#endif
}