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Add IPv6 route management for Windows client

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This commit is contained in:
domosekai 2021-07-28 15:50:23 +08:00
parent 5a05e7a249
commit ce0591d924
3 changed files with 411 additions and 59 deletions
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61
src/Cedar/VLanWin32.c
View File

@ -224,8 +224,7 @@ void RouteTrackingMain(SESSION *s)
}
// Search for the default gateway
if (IPToUINT(&e->DestIP) == 0 &&
IPToUINT(&e->DestMask) == 0)
if (IsZeroIP(&e->DestIP) && IsZeroIP(&e->DestMask))
{
Debug("e->InterfaceID = %u, t->VLanInterfaceId = %u\n",
e->InterfaceID, t->VLanInterfaceId);
@ -236,30 +235,34 @@ void RouteTrackingMain(SESSION *s)
is_vlan_want_to_be_default_gateway = true;
vlan_default_gateway_metric = e->Metric;
if (vlan_default_gateway_metric >= 2 &&
// PPP route fix (IPv4 only)
if (IsIP4(&e->DestIP))
{
if (vlan_default_gateway_metric >= 2 &&
t->OldDefaultGatewayMetric == (vlan_default_gateway_metric - 1))
{
// Restore because the PPP server rewrites
// the routing table selfishly
DeleteRouteEntry(e);
e->Metric--;
AddRouteEntry(e);
Debug("** Restore metric destroyed by PPP.\n");
{
// Restore because the PPP server rewrites
// the routing table selfishly
DeleteRouteEntry(e);
e->Metric--;
AddRouteEntry(e);
Debug("** Restore metric destroyed by PPP.\n");
any_modified = true;
any_modified = true;
}
// Keep this entry
if (t->DefaultGatewayByVLan != NULL)
{
// Delete if there is one added last time
FreeRouteEntry(t->DefaultGatewayByVLan);
}
t->DefaultGatewayByVLan = ZeroMalloc(sizeof(ROUTE_ENTRY));
Copy(t->DefaultGatewayByVLan, e, sizeof(ROUTE_ENTRY));
t->OldDefaultGatewayMetric = vlan_default_gateway_metric;
}
// Keep this entry
if (t->DefaultGatewayByVLan != NULL)
{
// Delete if there is one added last time
FreeRouteEntry(t->DefaultGatewayByVLan);
}
t->DefaultGatewayByVLan = ZeroMalloc(sizeof(ROUTE_ENTRY));
Copy(t->DefaultGatewayByVLan, e, sizeof(ROUTE_ENTRY));
t->OldDefaultGatewayMetric = vlan_default_gateway_metric;
}
else
{
@ -372,8 +375,7 @@ void RouteTrackingMain(SESSION *s)
if (e->InterfaceID != t->VLanInterfaceId)
{
if (IPToUINT(&e->DestIP) == 0 &&
IPToUINT(&e->DestMask) == 0)
if (IsZeroIP(&e->DestIP) && IsZeroIP(&e->DestMask))
{
char str[64];
// Default gateway is found
@ -633,11 +635,6 @@ void RouteTrackingStart(SESSION *s)
MsFreeAdapter(a);
}
}
else
{
// For Win9x
Win32RenewDhcp9x(if_id);
}
// Clear the DNS cache
Win32FlushDnsCache();
@ -782,12 +779,12 @@ void RouteTrackingStop(SESSION *s, ROUTE_TRACKING *t)
// If the restoring routing entry is a default gateway and
// the existing routing table contains another default gateway
// on the interface, give up restoring the entry
if (IPToUINT(&e->DestIP) == 0 && IPToUINT(&e->DestMask) == 0)
if (IsZeroIP(&e->DestIP) && IsZeroIP(&e->DestMask))
{
for (i = 0;i < table->NumEntry;i++)
{
ROUTE_ENTRY *r = table->Entry[i];
if (IPToUINT(&r->DestIP) == 0 && IPToUINT(&r->DestMask) == 0)
if (IsZeroIP(&r->DestIP) && IsZeroIP(&r->DestMask))
{
if (r->InterfaceID == e->InterfaceID)
{

400
src/Mayaqua/Network.c
View File

@ -62,6 +62,7 @@ struct ROUTE_CHANGE_DATA
OVERLAPPED Overlapped;
HANDLE Handle;
UINT NumCalled;
bool Changed;
};
#endif
@ -6124,7 +6125,7 @@ ICMP_RESULT *IcmpApiEchoSend(IP *dest_ip, UCHAR ttl, UCHAR *data, UINT size, UIN
ROUTE_CHANGE *NewRouteChange()
{
#ifdef OS_WIN32
return Win32NewRouteChange();
return Win32NewRouteChange2(true, true, NULL);
#else // OS_WIN32
return NULL;
#endif // OS_WIN32
@ -6134,7 +6135,7 @@ ROUTE_CHANGE *NewRouteChange()
void FreeRouteChange(ROUTE_CHANGE *r)
{
#ifdef OS_WIN32
Win32FreeRouteChange(r);
Win32FreeRouteChange2(r);
#endif // OS_WIN32
}
@ -6142,7 +6143,7 @@ void FreeRouteChange(ROUTE_CHANGE *r)
bool IsRouteChanged(ROUTE_CHANGE *r)
{
#ifdef OS_WIN32
return Win32IsRouteChanged(r);
return Win32IsRouteChanged2(r);
#else // OS_WIN32
return false;
#endif // OS_WIN32
@ -6173,6 +6174,57 @@ ROUTE_CHANGE *Win32NewRouteChange()
return r;
}
void Win32RouteChangeCallback(void *context, MIB_IPFORWARD_ROW2 *row, MIB_NOTIFICATION_TYPE nt)
{
ROUTE_CHANGE_DATA *data = context;
data->Changed = true;
}
// Routing table change detector function (For Vista and later)
ROUTE_CHANGE *Win32NewRouteChange2(bool ipv4, bool ipv6, void *callback)
{
ROUTE_CHANGE *r;
BOOL ret;
ADDRESS_FAMILY family;
r = ZeroMalloc(sizeof(ROUTE_CHANGE));
r->Data = ZeroMalloc(sizeof(ROUTE_CHANGE_DATA));
if (ipv4 && ipv6)
{
family = AF_UNSPEC;
}
else if (ipv6)
{
family = AF_INET6;
}
else
{
family = AF_INET;
}
if (callback != NULL)
{
ret = NotifyRouteChange2(family, (PIPFORWARD_CHANGE_CALLBACK)callback, r->Data, false, &r->Data->Handle);
}
else
{
// Use default callback if not provided
ret = NotifyRouteChange2(family, (PIPFORWARD_CHANGE_CALLBACK)Win32RouteChangeCallback, r->Data, false, &r->Data->Handle);
}
if (ret != NO_ERROR)
{
Free(r->Data);
Free(r);
return NULL;
}
return r;
}
void Win32FreeRouteChange(ROUTE_CHANGE *r)
{
// Validate arguments
@ -6188,6 +6240,20 @@ void Win32FreeRouteChange(ROUTE_CHANGE *r)
Free(r);
}
void Win32FreeRouteChange2(ROUTE_CHANGE *r)
{
// Validate arguments
if (r == NULL)
{
return;
}
CancelMibChangeNotify2(r->Data->Handle);
Free(r->Data);
Free(r);
}
bool Win32IsRouteChanged(ROUTE_CHANGE *r)
{
// Validate arguments
@ -6210,6 +6276,28 @@ bool Win32IsRouteChanged(ROUTE_CHANGE *r)
return false;
}
bool Win32IsRouteChanged2(ROUTE_CHANGE *r)
{
// Validate arguments
if (r == NULL)
{
return false;
}
if ((r->Data->NumCalled++) == 0)
{
return true;
}
if (r->Data->Changed)
{
r->Data->Changed = false;
return true;
}
return false;
}
typedef struct WIN32_ACCEPT_CHECK_DATA
{
bool IsIPv6;
@ -6481,6 +6569,17 @@ void GenerateEui64Address6(UCHAR *dst, UCHAR *mac)
}
// Examine whether two IP addresses are in the same network
bool IsInSameNetwork(IP *a1, IP *a2, IP *subnet)
{
if (IsIP4(a1))
{
return IsInSameNetwork4(a1, a2, subnet);
}
else
{
return IsInSameNetwork6(a1, a2, subnet);
}
}
bool IsInSameNetwork6ByStr(char *ip1, char *ip2, char *subnet)
{
IP p1, p2, s;
@ -9371,6 +9470,23 @@ void Win32DeleteRouteEntry(ROUTE_ENTRY *e)
Free(p);
}
// Remove a routing entry from the routing table (For Vista and later)
void Win32DeleteRouteEntry2(ROUTE_ENTRY *e)
{
MIB_IPFORWARD_ROW2 *p;
// Validate arguments
if (e == NULL)
{
return;
}
p = ZeroMallocFast(sizeof(MIB_IPFORWARD_ROW2));
Win32RouteEntryToIpForwardRow2(p, e);
DeleteIpForwardEntry2(p);
Free(p);
}
// Add a routing entry to the routing table
bool Win32AddRouteEntry(ROUTE_ENTRY *e, bool *already_exists)
{
@ -9418,6 +9534,53 @@ bool Win32AddRouteEntry(ROUTE_ENTRY *e, bool *already_exists)
return ret;
}
// Add a routing entry to the routing table (For Vista and later)
bool Win32AddRouteEntry2(ROUTE_ENTRY *e, bool *already_exists)
{
bool ret = false;
bool dummy = false;
MIB_IPFORWARD_ROW2 *p;
UINT err = 0;
// Validate arguments
if (e == NULL)
{
return false;
}
if (already_exists == NULL)
{
already_exists = &dummy;
}
*already_exists = false;
p = ZeroMallocFast(sizeof(MIB_IPFORWARD_ROW2));
Win32RouteEntryToIpForwardRow2(p, e);
err = CreateIpForwardEntry2(p);
if (err != 0)
{
if (err == ERROR_OBJECT_ALREADY_EXISTS)
{
Debug("CreateIpForwardEntry2: Already Exists\n");
*already_exists = true;
ret = true;
}
else
{
Debug("CreateIpForwardEntry2 Error: %u\n", err);
ret = false;
}
}
else
{
ret = true;
}
Free(p);
return ret;
}
// Get the routing table
ROUTE_TABLE *Win32GetRouteTable()
{
@ -9485,6 +9648,68 @@ FAILED:
return t;
}
// Get the routing table (For Vista and later)
ROUTE_TABLE *Win32GetRouteTable2(bool ipv4, bool ipv6)
{
ROUTE_TABLE *t = ZeroMallocFast(sizeof(ROUTE_TABLE));
MIB_IPFORWARD_TABLE2 *p = NULL;
UINT ret;
UINT num_retry = 0;
LIST *o;
UINT i;
ROUTE_ENTRY *e;
ADDRESS_FAMILY family;
if (ipv4 && ipv6)
{
family = AF_UNSPEC;
}
else if (ipv6)
{
family = AF_INET6;
}
else
{
family = AF_INET;
}
RETRY:
// Actually get
ret = GetIpForwardTable2(family, &p);
if (ret != NO_ERROR)
{
// Acquisition failure
if ((++num_retry) >= 5)
{
FreeMibTable(p);
t->Entry = MallocFast(0);
return t;
}
FreeMibTable(p);
goto RETRY;
}
// Add to the list along
o = NewListFast(Win32CompareRouteEntryByMetric);
for (i = 0; i < p->NumEntries; i++)
{
e = ZeroMallocFast(sizeof(ROUTE_ENTRY));
Win32IpForwardRow2ToRouteEntry(e, &p->Table[i]);
Add(o, e);
}
FreeMibTable(p);
// Sort by metric
Sort(o);
// Combine the results
t->NumEntry = LIST_NUM(o);
t->Entry = ToArrayEx(o, true);
ReleaseList(o);
return t;
}
// Sort the routing entries by metric
int Win32CompareRouteEntryByMetric(void *p1, void *p2)
{
@ -9572,6 +9797,67 @@ void Win32RouteEntryToIpForwardRow(void *ip_forward_row, ROUTE_ENTRY *entry)
Debug(" r->dwForwardIfIndex=%u\n", r->dwForwardIfIndex);
}
// Convert the ROUTE_ENTRY to a MIB_IPFORWARD_ROW2 (For Vista and later)
void Win32RouteEntryToIpForwardRow2(void *ip_forward_row, ROUTE_ENTRY *entry)
{
MIB_IPFORWARD_ROW2 *r;
// Validate arguments
if (entry == NULL || ip_forward_row == NULL)
{
return;
}
r = (MIB_IPFORWARD_ROW2 *)ip_forward_row;
InitializeIpForwardEntry(r);
MIB_IPINTERFACE_ROW *p;
p = ZeroMallocFast(sizeof(MIB_IPINTERFACE_ROW));
if (IsIP4(&entry->DestIP))
{
// IP address
r->DestinationPrefix.Prefix.Ipv4.sin_family = AF_INET;
IPToInAddr(&r->DestinationPrefix.Prefix.Ipv4.sin_addr, &entry->DestIP);
// Subnet mask
r->DestinationPrefix.PrefixLength = SubnetMaskToInt4(&entry->DestMask);
// Gateway IP address
r->NextHop.Ipv4.sin_family = AF_INET;
IPToInAddr(&r->NextHop.Ipv4.sin_addr, &entry->GatewayIP);
// Interface
p->Family = AF_INET;
}
else
{
// IP address
r->DestinationPrefix.Prefix.Ipv6.sin6_family = AF_INET6;
IPToInAddr6(&r->DestinationPrefix.Prefix.Ipv6.sin6_addr, &entry->DestIP);
// Subnet mask
r->DestinationPrefix.PrefixLength = SubnetMaskToInt6(&entry->DestMask);
// Gateway IP address
r->NextHop.Ipv6.sin6_family = AF_INET6;
IPToInAddr6(&r->NextHop.Ipv6.sin6_addr, &entry->GatewayIP);
// Interface
p->Family = AF_INET6;
}
// Metric
p->InterfaceIndex = entry->InterfaceID;
if (GetIpInterfaceEntry(p) == NO_ERROR && entry->Metric >= p->Metric)
{
r->Metric = entry->Metric - p->Metric;
}
else
{
r->Metric = entry->Metric;
}
Free(p);
// Interface ID
r->InterfaceIndex = entry->InterfaceID;
Debug("Win32RouteEntryToIpForwardRow2()\n");
}
// Convert the MIB_IPFORWARDROW to a ROUTE_ENTRY
void Win32IpForwardRowToRouteEntry(ROUTE_ENTRY *entry, void *ip_forward_row)
{
@ -9611,6 +9897,77 @@ void Win32IpForwardRowToRouteEntry(ROUTE_ENTRY *entry, void *ip_forward_row)
entry->InterfaceID = r->dwForwardIfIndex;
}
// Convert the MIB_IPFORWARD_ROW2 to a ROUTE_ENTRY (For Vista and later)
void Win32IpForwardRow2ToRouteEntry(ROUTE_ENTRY *entry, void *ip_forward_row)
{
MIB_IPFORWARD_ROW2 *r;
// Validate arguments
if (entry == NULL || ip_forward_row == NULL)
{
return;
}
r = (MIB_IPFORWARD_ROW2 *)ip_forward_row;
Zero(entry, sizeof(ROUTE_ENTRY));
MIB_IPINTERFACE_ROW *p;
p = ZeroMallocFast(sizeof(MIB_IPINTERFACE_ROW));
if (((struct sockaddr *)&r->DestinationPrefix.Prefix)->sa_family != AF_INET6)
{
// IP address
InAddrToIP(&entry->DestIP, &r->DestinationPrefix.Prefix.Ipv4.sin_addr);
// Subnet mask
IntToSubnetMask4(&entry->DestMask, r->DestinationPrefix.PrefixLength);
// Gateway IP address
InAddrToIP(&entry->GatewayIP, &r->NextHop.Ipv4.sin_addr);
// Interface
p->Family = AF_INET;
}
else
{
// IP address
InAddrToIP6(&entry->DestIP, &r->DestinationPrefix.Prefix.Ipv6.sin6_addr);
// Subnet mask
IntToSubnetMask6(&entry->DestMask, r->DestinationPrefix.PrefixLength);
// Gateway IP address
InAddrToIP6(&entry->GatewayIP, &r->NextHop.Ipv6.sin6_addr);
// Interface
p->Family = AF_INET6;
}
// Local routing flag
if (IsZeroIP(&entry->GatewayIP))
{
entry->LocalRouting = true;
}
else
{
entry->LocalRouting = false;
}
if (entry->LocalRouting && r->Protocol == 3)
{
// PPP. Danger!
entry->PPPConnection = true;
}
// Metric
p->InterfaceIndex = r->InterfaceIndex;
if (GetIpInterfaceEntry(p) == NO_ERROR)
{
entry->Metric = r->Metric + p->Metric;
}
else
{
entry->Metric = r->Metric;
}
Free(p);
// Interface ID
entry->InterfaceID = r->InterfaceIndex;
}
// Initializing the socket library
void Win32InitSocketLibrary()
{
@ -10233,23 +10590,12 @@ ROUTE_ENTRY *GetBestRouteEntryFromRouteTableEx(ROUTE_TABLE *table, IP *ip, UINT
return NULL;
}
if (IsIP6(ip))
{
// IPv6 is not supported
return NULL;
}
// Select routing table entry by following rule
// 1. Largest subnet mask
// 2. Smallest metric value
for (i = 0; i < table->NumEntry; i++)
{
ROUTE_ENTRY *e = table->Entry[i];
UINT dest, net, mask;
dest = IPToUINT(ip);
net = IPToUINT(&e->DestIP);
mask = IPToUINT(&e->DestMask);
if (exclude_if_id != 0)
{
@ -10260,10 +10606,10 @@ ROUTE_ENTRY *GetBestRouteEntryFromRouteTableEx(ROUTE_TABLE *table, IP *ip, UINT
}
// Mask test
if ((dest & mask) == (net & mask))
if (IsInSameNetwork(ip, &e->DestIP, &e->DestMask))
{
// Calculate the score
UINT score_high32 = mask;
UINT score_high32 = SubnetMaskToInt(&e->DestMask);
UINT score_low32 = 0xFFFFFFFF - e->Metric;
UINT64 score64 = (UINT64)score_high32 * (UINT64)0x80000000 * (UINT64)2 + (UINT64)score_low32;
if (score64 == 0)
@ -10294,24 +10640,24 @@ ROUTE_ENTRY *GetBestRouteEntryFromRouteTableEx(ROUTE_TABLE *table, IP *ip, UINT
if (tmp != NULL)
{
UINT dest, gateway, mask;
// Generate an entry
ret = ZeroMallocFast(sizeof(ROUTE_ENTRY));
Copy(&ret->DestIP, ip, sizeof(IP));
SetIP(&ret->DestMask, 255, 255, 255, 255);
if (IsIP4(ip))
{
IntToSubnetMask4(&ret->DestMask, 32);
}
else
{
IntToSubnetMask6(&ret->DestMask, 128);
}
Copy(&ret->GatewayIP, &tmp->GatewayIP, sizeof(IP));
ret->InterfaceID = tmp->InterfaceID;
ret->LocalRouting = tmp->LocalRouting;
ret->OldIfMetric = tmp->Metric;
ret->Metric = 1;
ret->PPPConnection = tmp->PPPConnection;
// Calculation related to routing control
dest = IPToUINT(&tmp->DestIP);
gateway = IPToUINT(&tmp->GatewayIP);
mask = IPToUINT(&tmp->DestMask);
}
return ret;
@ -10479,7 +10825,7 @@ void DeleteRouteEntry(ROUTE_ENTRY *e)
{
Debug("DeleteRouteEntry();\n");
#ifdef OS_WIN32
Win32DeleteRouteEntry(e);
Win32DeleteRouteEntry2(e);
#else // OS_WIN32
UnixDeleteRouteEntry(e);
#endif
@ -10496,7 +10842,7 @@ bool AddRouteEntryEx(ROUTE_ENTRY *e, bool *already_exists)
bool ret = false;
Debug("AddRouteEntryEx();\n");
#ifdef OS_WIN32
ret = Win32AddRouteEntry(e, already_exists);
ret = Win32AddRouteEntry2(e, already_exists);
#else // OS_WIN32
ret = UnixAddRouteEntry(e, already_exists);
#endif
@ -10512,7 +10858,7 @@ ROUTE_TABLE *GetRouteTable()
UCHAR hash[MD5_SIZE];
#ifdef OS_WIN32
t = Win32GetRouteTable();
t = Win32GetRouteTable2(true, true);
#else //OS_WIN32
t = UnixGetRouteTable();
#endif // OS_WIN32

9
src/Mayaqua/Network.h
View File

@ -959,11 +959,16 @@ void Win32InitAsyncSocket(SOCK *sock);
void Win32JoinSockToSockEvent(SOCK *sock, SOCK_EVENT *event);
void Win32FreeAsyncSocket(SOCK *sock);
void Win32IpForwardRowToRouteEntry(ROUTE_ENTRY *entry, void *ip_forward_row);
void Win32IpForwardRow2ToRouteEntry(ROUTE_ENTRY *entry, void *ip_forward_row);
void Win32RouteEntryToIpForwardRow(void *ip_forward_row, ROUTE_ENTRY *entry);
void Win32RouteEntryToIpForwardRow2(void *ip_forward_row, ROUTE_ENTRY *entry);
int Win32CompareRouteEntryByMetric(void *p1, void *p2);
ROUTE_TABLE *Win32GetRouteTable();
ROUTE_TABLE *Win32GetRouteTable2(bool ipv4, bool ipv6);
bool Win32AddRouteEntry(ROUTE_ENTRY *e, bool *already_exists);
bool Win32AddRouteEntry2(ROUTE_ENTRY *e, bool *already_exists);
void Win32DeleteRouteEntry(ROUTE_ENTRY *e);
void Win32DeleteRouteEntry2(ROUTE_ENTRY *e);
void Win32UINTToIP(IP *ip, UINT i);
UINT Win32IPToUINT(IP *ip);
UINT Win32GetVLanInterfaceID(char *instance_name);
@ -981,8 +986,11 @@ void Win32ReleaseDhcp9x(UINT if_id, bool wait);
void Win32FlushDnsCache();
int CompareIpAdapterIndexMap(void *p1, void *p2);
ROUTE_CHANGE *Win32NewRouteChange();
ROUTE_CHANGE *Win32NewRouteChange2(bool ipv4, bool ipv6, void *callback);
void Win32FreeRouteChange(ROUTE_CHANGE *r);
void Win32FreeRouteChange2(ROUTE_CHANGE *r);
bool Win32IsRouteChanged(ROUTE_CHANGE *r);
bool Win32IsRouteChanged2(ROUTE_CHANGE *r);
bool Win32GetAdapterFromGuid(void *a, char *guid);
SOCKET Win32Accept(SOCK *sock, SOCKET s, struct sockaddr *addr, int *addrlen, bool ipv6);
@ -1225,6 +1233,7 @@ void GetLoopbackAddress6(IP *ip);
UINT GetIPAddrType6(IP *ip);
UINT GetIPv6AddrType(IPV6_ADDR *addr);
void GetPrefixAddress6(IP *dst, IP *ip, IP *subnet);
bool IsInSameNetwork(IP *a1, IP *a2, IP *subnet);
bool IsInSameNetwork6(IP *a1, IP *a2, IP *subnet);
bool IsInSameNetwork6ByStr(char *ip1, char *ip2, char *subnet);
void GenerateEui64Address6(UCHAR *dst, UCHAR *mac);