Changeset 11057 in vbox for trunk/src/VBox/Devices/Network

Timestamp:

Aug 1, 2008 1:45:41 AM (17 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

33952

Message:

intnet: Allocate a 2KB temporary buffer to deal with segmented packets during ARP and DHCP snooping.

File:

• trunk/src/VBox/Devices/Network/SrvIntNetR0.cpp (modified) (4 diffs)

trunk/src/VBox/Devices/Network/SrvIntNetR0.cpp

@@ -205 +205 @@
     /** The SUPR0 object id. */
     void                   *pvObj;
+    /** Pointer to the temporary buffer that is used when snooping fragmented packets.
+     * This is allocated after this structure if we're sharing the MAC address with
+     * the host. The buffer is INTNETNETWORK_TMP_SIZE big and aligned on a 64-byte boundrary. */
+    uint8_t                *pbTmp;
     /** Network creation flags (INTNET_OPEN_FLAGS_*). */
     uint32_t                fFlags;
@@ -220 +224 @@
 /** Pointer to an internal network. */
 typedef INTNETNETWORK *PINTNETNETWORK;
+
+/** The size of the buffer INTNETNETWORK::pbTmp points at. */
+#define INTNETNETWORK_TMP_SIZE  2048
 
 
@@ -3353 +3360 @@
      * Allocate and initialize.
      */
-    PINTNETNETWORK pNew = (PINTNETNETWORK)RTMemAllocZ(sizeof(*pNew));
+    size_t cb = sizeof(INTNETNETWORK);
+    if (fFlags & INTNET_OPEN_FLAGS_SHARED_MAC_ON_WIRE)
+        cb += INTNETNETWORK_TMP_SIZE + 64;
+    PINTNETNETWORK pNew = (PINTNETNETWORK)RTMemAllocZ(cb);
     if (!pNew)
         return VERR_NO_MEMORY;
@@ -3370 +3380 @@
         Assert(strlen(pszTrunk) < sizeof(pNew->szTrunk));   /* caller's responsibility. */
         strcpy(pNew->szTrunk, pszTrunk);
+        if (fFlags & INTNET_OPEN_FLAGS_SHARED_MAC_ON_WIRE)
+            pNew->pbTmp = RT_ALIGN_PT(pNew + 1, 64, uint8_t *);
+        //else
+        //    pNew->pbTmp = NULL;
 
         /*