/*----------------------------------------------------------------------
| NPT_NetworkInterface::GetNetworkInterfaces
+---------------------------------------------------------------------*/
NPT_Result
NPT_NetworkInterface::GetNetworkInterfaces(NPT_List<NPT_NetworkInterface*>& interfaces)
{
int net = socket(AF_INET, SOCK_DGRAM, 0);
// Try to get the config until we have enough memory for it
// According to "Unix Network Programming", some implementations
// do not return an error when the supplied buffer is too small
// so we need to try, increasing the buffer size every time,
// until we get the same size twice. We cannot assume success when
// the returned size is smaller than the supplied buffer, because
// some implementations can return less that the buffer size if
// another structure does not fit.
unsigned int buffer_size = 4096; // initial guess
unsigned int last_size = 0;
struct ifconf config;
unsigned char* buffer;
for (; buffer_size < 65536;) {
buffer = new unsigned char[buffer_size];
config.ifc_len = buffer_size;
config.ifc_buf = (char*)buffer;
if (ioctl(net, SIOCGIFCONF, &config) < 0) {
if (errno != EINVAL || last_size != 0) {
return NPT_ERROR_BASE_UNIX-errno;
}
} else {
if ((unsigned int)config.ifc_len == last_size) {
// same size, we can use the buffer
break;
}
// different size, we need to reallocate
last_size = config.ifc_len;
}
// supply 4096 more bytes more next time around
buffer_size += 4096;
delete[] buffer;
}
// iterate over all objects
unsigned char *entries;
for (entries = buffer; entries < buffer+config.ifc_len;) {
struct ifreq* entry = (struct ifreq*)entries;
// get the size of the addresses
unsigned int address_length;
#if defined(NPT_CONFIG_HAVE_SOCKADDR_SA_LEN)
address_length = sizeof(struct sockaddr) > entry->ifr_addr.sa_len ?
sizeof(sockaddr) : entry->ifr_addr.sa_len;
#else
switch (entry->ifr_addr.sa_family) {
#if defined(AF_INET6)
case AF_INET6:
address_length = sizeof(struct sockaddr_in6);
break;
#endif // defined(AF_INET6)
default:
address_length = sizeof(struct sockaddr);
break;
}
#endif
// point to the next entry
entries += address_length + sizeof(entry->ifr_name);
// ignore anything except AF_INET and AF_LINK addresses
if (entry->ifr_addr.sa_family != AF_INET
#if defined(AF_LINK)
&& entry->ifr_addr.sa_family != AF_LINK
#endif
) {
continue;
}
// get detailed info about the interface
NPT_Flags flags = 0;
#if defined(SIOCGIFFLAGS)
struct ifreq query = *entry;
if (ioctl(net, SIOCGIFFLAGS, &query) < 0) continue;
// process the flags
if ((query.ifr_flags & IFF_UP) == 0) {
// the interface is not up, ignore it
continue;
}
if (query.ifr_flags & IFF_BROADCAST) {
flags |= NPT_NETWORK_INTERFACE_FLAG_BROADCAST;
}
if (query.ifr_flags & IFF_LOOPBACK) {
flags |= NPT_NETWORK_INTERFACE_FLAG_LOOPBACK;
}
#if defined(IFF_POINTOPOINT)
if (query.ifr_flags & IFF_POINTOPOINT) {
flags |= NPT_NETWORK_INTERFACE_FLAG_POINT_TO_POINT;
}
#endif // defined(IFF_POINTOPOINT)
if (query.ifr_flags & IFF_PROMISC) {
flags |= NPT_NETWORK_INTERFACE_FLAG_PROMISCUOUS;
}
if (query.ifr_flags & IFF_MULTICAST) {
flags |= NPT_NETWORK_INTERFACE_FLAG_MULTICAST;
}
#endif // defined(SIOCGIFFLAGS)
// get a pointer to an interface we've looped over before
// or create a new one
NPT_NetworkInterface* interface = NULL;
for (NPT_List<NPT_NetworkInterface*>::Iterator iface_iter = interfaces.GetFirstItem();
iface_iter;
++iface_iter) {
if ((*iface_iter)->GetName() == (const char*)entry->ifr_name) {
interface = *iface_iter;
break;
}
}
if (interface == NULL) {
// create a new interface object
interface = new NPT_NetworkInterface(entry->ifr_name, flags);
// add the interface to the list
interfaces.Add(interface);
// get the mac address
#if defined(SIOCGIFHWADDR)
if (ioctl(net, SIOCGIFHWADDR, &query) == 0) {
NPT_MacAddress::Type mac_addr_type;
unsigned int mac_addr_length = IFHWADDRLEN;
switch (query.ifr_addr.sa_family) {
#if defined(ARPHRD_ETHER)
case ARPHRD_ETHER:
mac_addr_type = NPT_MacAddress::TYPE_ETHERNET;
break;
#endif
#if defined(ARPHRD_LOOPBACK)
case ARPHRD_LOOPBACK:
mac_addr_type = NPT_MacAddress::TYPE_LOOPBACK;
length = 0;
break;
#endif
#if defined(ARPHRD_PPP)
case ARPHRD_PPP:
mac_addr_type = NPT_MacAddress::TYPE_PPP;
mac_addr_length = 0;
break;
#endif
#if defined(ARPHRD_IEEE80211)
case ARPHRD_IEEE80211:
mac_addr_type = NPT_MacAddress::TYPE_IEEE_802_11;
break;
#endif
default:
mac_addr_type = NPT_MacAddress::TYPE_UNKNOWN;
mac_addr_length = sizeof(query.ifr_addr.sa_data);
break;
}
interface->SetMacAddress(mac_addr_type, (const unsigned char*)query.ifr_addr.sa_data, mac_addr_length);
}
#endif
}
switch (entry->ifr_addr.sa_family) {
case AF_INET: {
// primary address
NPT_IpAddress primary_address(ntohl(((struct sockaddr_in*)&entry->ifr_addr)->sin_addr.s_addr));
// broadcast address
NPT_IpAddress broadcast_address;
#if defined(SIOCGIFBRDADDR)
if (flags & NPT_NETWORK_INTERFACE_FLAG_BROADCAST) {
if (ioctl(net, SIOCGIFBRDADDR, &query) == 0) {
broadcast_address.Set(ntohl(((struct sockaddr_in*)&query.ifr_addr)->sin_addr.s_addr));
}
}
#endif
// point to point address
NPT_IpAddress destination_address;
#if defined(SIOCGIFDSTADDR)
if (flags & NPT_NETWORK_INTERFACE_FLAG_POINT_TO_POINT) {
if (ioctl(net, SIOCGIFDSTADDR, &query) == 0) {
destination_address.Set(ntohl(((struct sockaddr_in*)&query.ifr_addr)->sin_addr.s_addr));
}
}
#endif
// netmask
NPT_IpAddress netmask(0xFFFFFFFF);
#if defined(SIOCGIFNETMASK)
if (ioctl(net, SIOCGIFNETMASK, &query) == 0) {
netmask.Set(ntohl(((struct sockaddr_in*)&query.ifr_addr)->sin_addr.s_addr));
}
#endif
// add the address to the interface
NPT_NetworkInterfaceAddress iface_address(
primary_address,
broadcast_address,
destination_address,
netmask);
interface->AddAddress(iface_address);
break;
}
#if defined(AF_LINK) && defined(NPT_CONFIG_HAVE_SOCKADDR_DL)
case AF_LINK: {
struct sockaddr_dl* mac_addr = (struct sockaddr_dl*)&entry->ifr_addr;
NPT_MacAddress::Type mac_addr_type = NPT_MacAddress::TYPE_UNKNOWN;
switch (mac_addr->sdl_type) {
#if defined(IFT_LOOP)
case IFT_LOOP:
mac_addr_type = NPT_MacAddress::TYPE_LOOPBACK;
break;
#endif
#if defined(IFT_ETHER)
case IFT_ETHER:
mac_addr_type = NPT_MacAddress::TYPE_ETHERNET;
break;
#endif
#if defined(IFT_PPP)
case IFT_PPP:
mac_addr_type = NPT_MacAddress::TYPE_PPP;
break;
#endif
}
interface->SetMacAddress(mac_addr_type,
(const unsigned char*)(&mac_addr->sdl_data[mac_addr->sdl_nlen]),
mac_addr->sdl_alen);
break;
}
#endif
}
}
// free resources
delete[] buffer;
close(net);
return NPT_SUCCESS;
}
/*----------------------------------------------------------------------
| NPT_NetworkInterface::GetNetworkInterfaces
+---------------------------------------------------------------------*/
NPT_Result
NPT_NetworkInterface::GetNetworkInterfaces(NPT_List<NPT_NetworkInterface*>& interfaces)
{
int result = 0;
struct ifaddrs * ifaddrsList = NULL;
struct ifaddrs * ifaddr = NULL;
NPT_Flags flags = 0;
result = getifaddrs(&ifaddrsList);
if( result != 0 || ifaddrsList == NULL)
return NPT_FAILURE;
for(ifaddr = ifaddrsList; NULL!= ifaddr; ifaddr = ifaddr->ifa_next) {
if(ifaddr->ifa_addr == NULL /*|| ifaddr->ifa_addr->sa_family == AF_INET6*/)
continue;
// process the flags
if ((ifaddr->ifa_flags & IFF_UP) == 0) {
// the interface is not up, ignore it
continue;
}
if (ifaddr->ifa_flags & IFF_BROADCAST) {
flags |= NPT_NETWORK_INTERFACE_FLAG_BROADCAST;
}
if (ifaddr->ifa_flags & IFF_LOOPBACK) {
flags |= NPT_NETWORK_INTERFACE_FLAG_LOOPBACK;
}
#if defined(IFF_POINTOPOINT)
if (ifaddr->ifa_flags & IFF_POINTOPOINT) {
flags |= NPT_NETWORK_INTERFACE_FLAG_POINT_TO_POINT;
}
#endif // defined(IFF_POINTOPOINT)
if (ifaddr->ifa_flags & IFF_PROMISC) {
flags |= NPT_NETWORK_INTERFACE_FLAG_PROMISCUOUS;
}
if (ifaddr->ifa_flags & IFF_MULTICAST) {
flags |= NPT_NETWORK_INTERFACE_FLAG_MULTICAST;
}
NPT_NetworkInterface* interface = NULL;
for (NPT_List<NPT_NetworkInterface*>::Iterator iface_iter = interfaces.GetFirstItem();
iface_iter;
++iface_iter) {
if ((*iface_iter)->GetName() == (const char*)ifaddr->ifa_name) {
interface = *iface_iter;
break;
}
}
// create a new interface object
if(interface == NULL)
interface = new NPT_NetworkInterface(ifaddr->ifa_name, flags);
if (interface == NULL)
continue;
// get the mac address
NPT_MacAddress::Type mac_addr_type;
unsigned int mac_addr_length = IFHWADDRLEN;
switch (ifaddr->ifa_addr->sa_family) {
case AF_LOCAL:
case AF_INET:
#if defined(AF_LINK)
case AF_LINK:
#endif
mac_addr_type = NPT_MacAddress::TYPE_ETHERNET;
#if defined(ARPHRD_LOOPBACK)
mac_addr_type = NPT_MacAddress::TYPE_LOOPBACK;
length = 0;
#endif
break;
#if defined(AF_PPP)
case AF_PPP:
mac_addr_type = NPT_MacAddress::TYPE_PPP;
mac_addr_length = 0;
break;
#endif
#if defined(AF_IEEE80211)
case AF_IEEE80211:
mac_addr_type = NPT_MacAddress::TYPE_IEEE_802_11;
break;
#endif
default:
mac_addr_type = NPT_MacAddress::TYPE_UNKNOWN;
mac_addr_length = sizeof(ifaddr->ifa_addr->sa_data);
break;
}
if(interface->GetMacAddress().GetLength() == 0)
interface->SetMacAddress(mac_addr_type, (const unsigned char*)ifaddr->ifa_addr->sa_data, mac_addr_length);
#if defined(NPT_CONFIG_HAVE_NET_IF_DL_H)
if (ifaddr->ifa_addr->sa_family == AF_LINK) {
//Refer to LLADDR
struct sockaddr_dl * socket_dl = (struct sockaddr_dl *)ifaddr->ifa_addr;
interface->SetMacAddress(mac_addr_type, (const unsigned char*)socket_dl->sdl_data+socket_dl->sdl_nlen, socket_dl->sdl_alen);
}
#endif
switch (ifaddr->ifa_addr->sa_family) {
case AF_INET: {
// primary address
NPT_IpAddress primary_address( ntohl(((struct sockaddr_in *)ifaddr->ifa_addr)->sin_addr.s_addr));
// broadcast address
NPT_IpAddress broadcast_address;
if ((flags & NPT_NETWORK_INTERFACE_FLAG_BROADCAST) && ifaddr->ifa_dstaddr) {
broadcast_address.Set(ntohl(((struct sockaddr_in*)ifaddr->ifa_dstaddr)->sin_addr.s_addr));
}
// point to point address
NPT_IpAddress destination_address;
if ((flags & NPT_NETWORK_INTERFACE_FLAG_POINT_TO_POINT) && ifaddr->ifa_dstaddr) {
destination_address.Set(ntohl(((struct sockaddr_in*)ifaddr->ifa_dstaddr)->sin_addr.s_addr));
}
// netmask
NPT_IpAddress netmask(0xFFFFFFFF);
if(ifaddr->ifa_netmask)
netmask.Set(ntohl(((struct sockaddr_in*)ifaddr->ifa_netmask)->sin_addr.s_addr));
// add the address to the interface
NPT_NetworkInterfaceAddress iface_address(primary_address,
broadcast_address,
destination_address,
netmask);
interface->AddAddress(iface_address);
break;
}
}
// add the interface to the list
interfaces.Add(interface);
}
freeifaddrs(ifaddrsList);
return NPT_SUCCESS;
}