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#include <ws2tcpip.h>
#include <iphlpapi.h>
#include "common/netif.h"
#include "common/mallocHelper.h"
#include "common/windows/unicode.h"
#include "common/debug.h"
#include "localip.h"
#define FF_LOCALIP_NIFLAG(name) { IP_ADAPTER_##name, #name }
static const FFLocalIpNIFlag niFlagOptions[] = {
FF_LOCALIP_NIFLAG(DDNS_ENABLED),
FF_LOCALIP_NIFLAG(REGISTER_ADAPTER_SUFFIX),
FF_LOCALIP_NIFLAG(DHCP_ENABLED),
FF_LOCALIP_NIFLAG(RECEIVE_ONLY),
FF_LOCALIP_NIFLAG(NO_MULTICAST),
FF_LOCALIP_NIFLAG(IPV6_OTHER_STATEFUL_CONFIG),
FF_LOCALIP_NIFLAG(NETBIOS_OVER_TCPIP_ENABLED),
FF_LOCALIP_NIFLAG(IPV4_ENABLED),
FF_LOCALIP_NIFLAG(IPV6_ENABLED),
FF_LOCALIP_NIFLAG(IPV6_MANAGE_ADDRESS_CONFIG),
// sentinel
{},
};
const char* ffDetectLocalIps(const FFLocalIpOptions* options, FFlist* results) {
FF_DEBUG("Starting local IP detection with showType=0x%X, namePrefix='%.*s'",
options->showType,
(int) options->namePrefix.length,
options->namePrefix.chars);
IP_ADAPTER_ADDRESSES* FF_AUTO_FREE adapter_addresses = NULL;
// Multiple attempts in case interfaces change while
// we are in the middle of querying them.
DWORD adapter_addresses_buffer_size = 0;
for (int attempts = 0;; ++attempts) {
FF_DEBUG("Attempt %d to get adapter addresses, buffer size: %lu", attempts + 1, adapter_addresses_buffer_size);
if (adapter_addresses_buffer_size) {
adapter_addresses = (IP_ADAPTER_ADDRESSES*) realloc(adapter_addresses, adapter_addresses_buffer_size);
assert(adapter_addresses);
}
DWORD family = options->showType & FF_LOCALIP_TYPE_IPV4_BIT
? options->showType & FF_LOCALIP_TYPE_IPV6_BIT ? AF_UNSPEC : AF_INET
: AF_INET6;
FF_DEBUG("Calling GetAdaptersAddresses with family=%u, flags=0x%X", (unsigned) family, GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST | GAA_FLAG_SKIP_DNS_SERVER);
DWORD error = GetAdaptersAddresses(
family,
GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST | GAA_FLAG_SKIP_DNS_SERVER,
NULL,
adapter_addresses,
&adapter_addresses_buffer_size);
if (error == ERROR_SUCCESS) {
FF_DEBUG("GetAdaptersAddresses succeeded on attempt %d", attempts + 1);
break;
} else if (ERROR_BUFFER_OVERFLOW == error && attempts < 4) {
FF_DEBUG("Buffer overflow, need %lu bytes, retrying", adapter_addresses_buffer_size);
continue;
} else {
FF_DEBUG("GetAdaptersAddresses failed with error %lu after %d attempts", error, attempts + 1);
return "GetAdaptersAddresses() failed";
}
}
FF_A_UNUSED int adapterCount = 0, processedCount = 0;
// Iterate through all of the adapters
for (IP_ADAPTER_ADDRESSES* adapter = adapter_addresses; adapter; adapter = adapter->Next) {
adapterCount++;
FF_DEBUG("Processing adapter %d: IfIndex=%u, IfType=%u, OperStatus=%u",
adapterCount,
(unsigned) adapter->IfIndex,
(unsigned) adapter->IfType,
(unsigned) adapter->OperStatus);
if (adapter->OperStatus != IfOperStatusUp) {
FF_DEBUG("Skipping adapter %u (not operational, status=%d)", (unsigned) adapter->IfIndex, adapter->OperStatus);
continue;
}
bool isLoop = adapter->IfType == IF_TYPE_SOFTWARE_LOOPBACK;
FF_DEBUG("Adapter %u: isLoopback=%s", (unsigned) adapter->IfIndex, isLoop ? "true" : "false");
if (isLoop && !(options->showType & FF_LOCALIP_TYPE_LOOP_BIT)) {
FF_DEBUG("Skipping loopback adapter %u (loopback not requested)", (unsigned) adapter->IfIndex);
continue;
}
FF_STRBUF_AUTO_DESTROY name = ffStrbufCreateWS(adapter->FriendlyName);
FF_DEBUG("Adapter %u name: '%s'", (unsigned) adapter->IfIndex, name.chars);
if (options->namePrefix.length && !ffStrbufStartsWith(&name, &options->namePrefix)) {
FF_DEBUG("Skipping adapter %u (name doesn't match prefix '%.*s')",
(unsigned) adapter->IfIndex,
(int) options->namePrefix.length,
options->namePrefix.chars);
continue;
}
if (options->showType & FF_LOCALIP_TYPE_DEFAULT_ROUTE_ONLY_BIT) {
if (!((options->showType & FF_LOCALIP_TYPE_IPV4_BIT) && ffNetifGetDefaultRouteV4()->ifIndex == adapter->IfIndex) &&
!((options->showType & FF_LOCALIP_TYPE_IPV6_BIT) && ffNetifGetDefaultRouteV6()->ifIndex == adapter->IfIndex)) {
FF_DEBUG("Skipping interface %u (not default route interface)", (unsigned) adapter->IfIndex);
continue;
}
}
processedCount++;
FF_DEBUG("Creating result item for adapter %u ('%s')", (unsigned) adapter->IfIndex, name.chars);
FFLocalIpResult* item = FF_LIST_ADD(FFLocalIpResult, *results);
ffStrbufInitMove(&item->name, &name);
ffStrbufInit(&item->ipv4);
ffStrbufInit(&item->ipv6);
ffStrbufInit(&item->mac);
ffStrbufInit(&item->flags);
item->defaultRoute = FF_LOCALIP_TYPE_NONE;
item->speed = -1;
item->mtu = -1;
uint32_t typesToAdd = options->showType & (FF_LOCALIP_TYPE_IPV4_BIT | FF_LOCALIP_TYPE_IPV6_BIT | FF_LOCALIP_TYPE_ALL_IPS_BIT);
FF_DEBUG("Types to add for adapter %u: 0x%X", (unsigned) adapter->IfIndex, typesToAdd);
FF_A_UNUSED int ipv4Count = 0, ipv6Count = 0;
for (IP_ADAPTER_UNICAST_ADDRESS* ifa = adapter->FirstUnicastAddress; ifa; ifa = ifa->Next) {
FF_DEBUG("Processing unicast address: prefix origin=%d, suffix origin=%d, family=%d, DadState=%d",
ifa->PrefixOrigin,
ifa->SuffixOrigin,
ifa->Address.lpSockaddr->sa_family,
ifa->DadState);
if (!(options->showType & FF_LOCALIP_TYPE_ALL_IPS_BIT)) {
if (ifa->DadState != IpDadStatePreferred) {
FF_DEBUG("Skipping address (not preferred)");
continue;
}
if (ifa->SuffixOrigin == IpSuffixOriginRandom) {
FF_DEBUG("Skipping temporary address (random suffix)");
continue;
}
// MIB_UNICASTIPADDRESS_ROW::SkipAsSource
}
if (ifa->Address.lpSockaddr->sa_family == AF_INET) {
if (!(typesToAdd & (FF_LOCALIP_TYPE_IPV4_BIT | FF_LOCALIP_TYPE_ALL_IPS_BIT))) {
FF_DEBUG("Skipping IPv4 address (not requested in typesToAdd=0x%X)", typesToAdd);
continue;
}
bool isDefaultRoute = ((options->showType & FF_LOCALIP_TYPE_IPV4_BIT) && ffNetifGetDefaultRouteV4()->ifIndex == adapter->IfIndex);
if ((options->showType & FF_LOCALIP_TYPE_DEFAULT_ROUTE_ONLY_BIT) && !isDefaultRoute) {
FF_DEBUG("Skipping IPv4 address (not on default route interface)");
continue;
}
SOCKADDR_IN* ipv4 = (SOCKADDR_IN*) ifa->Address.lpSockaddr;
char addressBuffer[INET_ADDRSTRLEN + 10];
char* end = RtlIpv4AddressToStringA(&ipv4->sin_addr, addressBuffer);
if ((options->showType & FF_LOCALIP_TYPE_PREFIX_LEN_BIT) && ifa->OnLinkPrefixLength) {
end += snprintf(end, 10, "/%u", (unsigned) ifa->OnLinkPrefixLength);
}
FF_DEBUG("Adding IPv4 address: %s (isDefaultRoute=%s)", addressBuffer, isDefaultRoute ? "true" : "false");
if (item->ipv4.length) {
ffStrbufAppendC(&item->ipv4, ',');
}
ffStrbufAppendNS(&item->ipv4, (uint32_t) (end - addressBuffer), addressBuffer);
if (isDefaultRoute) {
item->defaultRoute |= FF_LOCALIP_TYPE_IPV4_BIT;
}
ipv4Count++;
typesToAdd &= ~(unsigned) FF_LOCALIP_TYPE_IPV4_BIT;
if (typesToAdd == 0) {
break;
}
} else if (ifa->Address.lpSockaddr->sa_family == AF_INET6) {
if (!(typesToAdd & (FF_LOCALIP_TYPE_IPV6_BIT | FF_LOCALIP_TYPE_ALL_IPS_BIT))) {
FF_DEBUG("Skipping IPv6 address (not requested in typesToAdd=0x%X)", typesToAdd);
continue;
}
SOCKADDR_IN6* ipv6 = (SOCKADDR_IN6*) ifa->Address.lpSockaddr;
FFLocalIpIpv6Type ipv6Type = FF_LOCALIP_IPV6_TYPE_NONE;
if (IN6_IS_ADDR_GLOBAL(&ipv6->sin6_addr)) {
ipv6Type |= FF_LOCALIP_IPV6_TYPE_GUA_BIT;
} else if (IN6_IS_ADDR_UNIQUE_LOCAL(&ipv6->sin6_addr)) {
ipv6Type |= FF_LOCALIP_IPV6_TYPE_ULA_BIT;
} else if (IN6_IS_ADDR_LINKLOCAL(&ipv6->sin6_addr)) {
ipv6Type |= FF_LOCALIP_IPV6_TYPE_LLA_BIT;
} else {
ipv6Type |= FF_LOCALIP_IPV6_TYPE_UNKNOWN_BIT;
}
if (!(options->ipv6Type & ipv6Type)) {
FF_DEBUG("Skipping IPv6 address (doesn't match requested type 0x%X)", options->ipv6Type);
continue;
}
bool isDefaultRoute = ((options->showType & FF_LOCALIP_TYPE_IPV6_BIT) && ffNetifGetDefaultRouteV6()->ifIndex == adapter->IfIndex);
if ((options->showType & FF_LOCALIP_TYPE_DEFAULT_ROUTE_ONLY_BIT) && !isDefaultRoute) {
FF_DEBUG("Skipping IPv6 address (not on default route interface)");
continue;
}
char addressBuffer[INET6_ADDRSTRLEN + 10];
char* end = RtlIpv6AddressToStringA(&ipv6->sin6_addr, addressBuffer);
if ((options->showType & FF_LOCALIP_TYPE_PREFIX_LEN_BIT) && ifa->OnLinkPrefixLength) {
end += snprintf(end, 10, "/%u", (unsigned) ifa->OnLinkPrefixLength);
}
FF_DEBUG("Adding IPv6 address: %s (isDefaultRoute=%s)", addressBuffer, isDefaultRoute ? "true" : "false");
if (item->ipv6.length) {
ffStrbufAppendC(&item->ipv6, ',');
}
ffStrbufAppendNS(&item->ipv6, (uint32_t) (end - addressBuffer), addressBuffer);
if (isDefaultRoute) {
item->defaultRoute |= FF_LOCALIP_TYPE_IPV6_BIT;
}
ipv6Count++;
typesToAdd &= ~(unsigned) FF_LOCALIP_TYPE_IPV6_BIT;
if (typesToAdd == 0) {
break;
}
}
}
FF_DEBUG("Adapter %u: collected %d IPv4 and %d IPv6 addresses", (unsigned) adapter->IfIndex, ipv4Count, ipv6Count);
if (options->showType & FF_LOCALIP_TYPE_SPEED_BIT) {
item->speed = (int32_t) (adapter->ReceiveLinkSpeed / 1000000);
FF_DEBUG("Adapter %u speed: %d Mbps (raw: %llu)", (unsigned) adapter->IfIndex, item->speed, adapter->ReceiveLinkSpeed);
}
if (options->showType & FF_LOCALIP_TYPE_MTU_BIT) {
item->mtu = (int32_t) adapter->Mtu;
FF_DEBUG("Adapter %u MTU: %d", (unsigned) adapter->IfIndex, item->mtu);
}
if (options->showType & FF_LOCALIP_TYPE_FLAGS_BIT) {
ffLocalIpFillNIFlags(&item->flags, adapter->Flags, niFlagOptions);
FF_DEBUG("Adapter %u flags: 0x%lX -> '%s'", (unsigned) adapter->IfIndex, adapter->Flags, item->flags.chars);
}
if (options->showType & FF_LOCALIP_TYPE_MAC_BIT && adapter->PhysicalAddressLength == 6) {
uint8_t* ptr = adapter->PhysicalAddress;
ffStrbufSetF(&item->mac, "%02x:%02x:%02x:%02x:%02x:%02x", ptr[0], ptr[1], ptr[2], ptr[3], ptr[4], ptr[5]);
FF_DEBUG("Adapter %u MAC: %s", (unsigned) adapter->IfIndex, item->mac.chars);
}
}
FF_DEBUG("Local IP detection completed: scanned %d adapters, processed %d, results count: %u",
adapterCount,
processedCount,
results->length);
return NULL;
}
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