[PATCH 1/4] iphlpapi: Implement GetIpAddrTable() on top of nsi.

[Huw Davies]

Signed-off-by: Huw Davies <huw(a)codeweavers.com>
---
 dlls/iphlpapi/iphlpapi_main.c  | 103 ++++++++++++++++-----------------
 dlls/iphlpapi/tests/iphlpapi.c |   2 +
 2 files changed, 51 insertions(+), 54 deletions(-)

diff --git a/dlls/iphlpapi/iphlpapi_main.c b/dlls/iphlpapi/iphlpapi_main.c
index 93d9b0440dd..8442bc2b4a9 100644
--- a/dlls/iphlpapi/iphlpapi_main.c
+++ b/dlls/iphlpapi/iphlpapi_main.c
@@ -148,19 +148,6 @@ static int IpAddrTableNumericSorter(const void *a, const void *b)
   return ret;
 }
 
-static int IpAddrTableLoopbackSorter(const void *a, const void *b)
-{
-  const MIB_IPADDRROW *left = a, *right = b;
-  int ret = 0;
-
-  if (isIfIndexLoopback(left->dwIndex))
-    ret = 1;
-  else if (isIfIndexLoopback(right->dwIndex))
-    ret = -1;
-
-  return ret;
-}
-
 /******************************************************************
  *    AllocateAndGetIpAddrTableFromStack (IPHLPAPI.@)
  *
@@ -2131,6 +2118,10 @@ DWORD WINAPI GetInterfaceInfo( IP_INTERFACE_INFO *table, ULONG *size )
     return ERROR_SUCCESS;
 }
 
+static int ipaddrrow_cmp( const void *a, const void *b )
+{
+    return ((const MIB_IPADDRROW*)a)->dwAddr - ((const MIB_IPADDRROW*)b)->dwAddr;
+}
 
 /******************************************************************
  *    GetIpAddrTable (IPHLPAPI.@)
@@ -2138,59 +2129,63 @@ DWORD WINAPI GetInterfaceInfo( IP_INTERFACE_INFO *table, ULONG *size )
  * Get interface-to-IP address mapping table. 
  *
  * PARAMS
- *  pIpAddrTable [Out]    buffer for mapping table
- *  pdwSize      [In/Out] length of output buffer
- *  bOrder       [In]     whether to sort the table
+ *  table        [Out]    buffer for mapping table
+ *  size         [In/Out] length of output buffer
+ *  sort         [In]     whether to sort the table
  *
  * RETURNS
  *  Success: NO_ERROR
  *  Failure: error code from winerror.h
  *
- * NOTES
- *  If pdwSize is less than required, the function will return
- *  ERROR_INSUFFICIENT_BUFFER, and *pdwSize will be set to the required byte
- *  size.
- *  If bOrder is true, the returned table will be sorted by the next hop and
- *  an assortment of arbitrary parameters.
  */
-DWORD WINAPI GetIpAddrTable(PMIB_IPADDRTABLE pIpAddrTable, PULONG pdwSize, BOOL bOrder)
+DWORD WINAPI GetIpAddrTable( MIB_IPADDRTABLE *table, ULONG *size, BOOL sort )
 {
-  DWORD ret;
+    DWORD err, count, needed, i, loopback, row_num = 0;
+    struct nsi_ipv4_unicast_key *keys;
+    struct nsi_ip_unicast_rw *rw;
 
-  TRACE("pIpAddrTable %p, pdwSize %p, bOrder %d\n", pIpAddrTable, pdwSize,
-   (DWORD)bOrder);
-  if (!pdwSize)
-    ret = ERROR_INVALID_PARAMETER;
-  else {
-    PMIB_IPADDRTABLE table;
+    TRACE( "table %p, size %p, sort %d\n", table, size, sort );
+    if (!size) return ERROR_INVALID_PARAMETER;
+
+    err = NsiAllocateAndGetTable( 1, &NPI_MS_IPV4_MODULEID, NSI_IP_UNICAST_TABLE, (void **)&keys, sizeof(*keys),
+                                  (void **)&rw, sizeof(*rw), NULL, 0, NULL, 0, &count, 0 );
+    if (err) return err;
 
-    ret = getIPAddrTable(&table, GetProcessHeap(), 0);
-    if (ret == NO_ERROR)
+    needed = FIELD_OFFSET( MIB_IPADDRTABLE, table[count] );
+
+    if (!table || *size < needed)
     {
-      ULONG size = FIELD_OFFSET(MIB_IPADDRTABLE, table[table->dwNumEntries]);
+        *size = needed;
+        err = ERROR_INSUFFICIENT_BUFFER;
+        goto err;
+    }
 
-      if (!pIpAddrTable || *pdwSize < size) {
-        *pdwSize = size;
-        ret = ERROR_INSUFFICIENT_BUFFER;
-      }
-      else {
-        *pdwSize = size;
-        memcpy(pIpAddrTable, table, size);
-        /* sort by numeric IP value */
-        if (bOrder)
-          qsort(pIpAddrTable->table, pIpAddrTable->dwNumEntries,
-           sizeof(MIB_IPADDRROW), IpAddrTableNumericSorter);
-        /* sort ensuring loopback interfaces are in the end */
-        else
-          qsort(pIpAddrTable->table, pIpAddrTable->dwNumEntries,
-           sizeof(MIB_IPADDRROW), IpAddrTableLoopbackSorter);
-        ret = NO_ERROR;
-      }
-      HeapFree(GetProcessHeap(), 0, table);
+    table->dwNumEntries = count;
+
+    for (loopback = 0; loopback < 2; loopback++) /* Move the loopback addresses to the end */
+    {
+        for (i = 0; i < count; i++)
+        {
+            MIB_IPADDRROW *row = table->table + row_num;
+
+            if (!!loopback != (keys[i].luid.Info.IfType == MIB_IF_TYPE_LOOPBACK)) continue;
+
+            row->dwAddr = keys[i].addr.WS_s_addr;
+            ConvertInterfaceLuidToIndex( &keys[i].luid, &row->dwIndex );
+            ConvertLengthToIpv4Mask( rw[i].on_link_prefix, &row->dwMask );
+            row->dwBCastAddr = 1;
+            row->dwReasmSize = 0xffff;
+            row->unused1 = 0;
+            row->wType = MIB_IPADDR_PRIMARY;
+            row_num++;
+        }
     }
-  }
-  TRACE("returning %d\n", ret);
-  return ret;
+
+    if (sort) qsort( table->table, count, sizeof(MIB_IPADDRROW), ipaddrrow_cmp );
+err:
+    NsiFreeTable( keys, rw, NULL, NULL );
+
+    return err;
 }
 
 
diff --git a/dlls/iphlpapi/tests/iphlpapi.c b/dlls/iphlpapi/tests/iphlpapi.c
index 1deac9b64f1..51566034f51 100644
--- a/dlls/iphlpapi/tests/iphlpapi.c
+++ b/dlls/iphlpapi/tests/iphlpapi.c
@@ -203,6 +203,8 @@ static void testGetIpAddrTable(void)
             for (i = 0; i < buf->dwNumEntries; i++)
             {
                 ok (buf->table[i].wType != 0, "Test[%d]: expected wType > 0\n", i);
+                ok (buf->table[i].dwBCastAddr == 1, "Test[%d]: got %08x\n", i, buf->table[i].dwBCastAddr);
+                ok (buf->table[i].dwReasmSize == 0xffff, "Test[%d]: got %08x\n", i, buf->table[i].dwReasmSize);
                 trace("Entry[%d]: addr %s, dwIndex %u, wType 0x%x\n", i,
                       ntoa(buf->table[i].dwAddr), buf->table[i].dwIndex, buf->table[i].wType);
             }
-- 
2.25.1