Changeset 39773 in vbox for trunk/src

Timestamp:

Jan 17, 2012 2:42:36 AM (13 years ago)

Author:

vboxsync

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

75718

Message:

NAT: logs and comments.

File:

• trunk/src/VBox/Devices/Network/slirp/libalias/alias_dns.c (modified) (9 diffs)

trunk/src/VBox/Devices/Network/slirp/libalias/alias_dns.c

@@ -30 +30 @@
 #define DNS_CONTROL_PORT_NUMBER 53
 /* see RFC 1035(4.1.1) */
+#pragma pack(1)
 union dnsmsg_header
 {
     struct
     {
-        unsigned id:16;
+        uint16_t id;
         unsigned rd:1;
         unsigned tc:1;
@@ -48 +49 @@
         uint16_t arcount;
     } X;
-    uint16_t raw[6];
+    uint16_t raw[5];
 };
+#pragma pack()
 AssertCompileSize(union dnsmsg_header, 12);
 
@@ -99 +101 @@
 {
     int i;
-
+    LogFlowFunc(("ENTER: pszQname:%s\n", pszQname));
+    pHdr->X.qr = 1; /* response */
     if (!pHostent)
     {
-        pHdr->X.qr = 1; /* response */
         pHdr->X.aa = 1;
         pHdr->X.rd = 1;
@@ -189 +191 @@
         pIp->ip_len = htons(packet_len);
     }
+    LogFlowFuncLeave();
 }
 
@@ -204 +207 @@
     struct udphdr *udp = NULL;
     union dnsmsg_header *pHdr = NULL;
+    LogFlowFuncEnter();
     NOREF(la);
     NOREF(ah);
@@ -210 +214 @@
 
     if (pHdr->X.qr == 1)
+    {
+        LogFlowFunc(("pHdr(X.qr:%d, raw:%RX16)\n", pHdr->X.qr, pHdr->raw));
+        LogFlowFuncLeave();
         return 0; /* this is respose */
+    }
 
     memset(pszCname, 0, sizeof(pszCname));
@@ -223 +231 @@
             fMultiWarn = true;
         }
+        LogFlowFuncLeave();
         return 1;
     }
@@ -263 +272 @@
     pIp->ip_sum = 0;
     pIp->ip_sum = LibAliasInternetChecksum(la, (uint16_t *)pIp, pIp->ip_hl << 2);
+    LogFlowFuncLeave();
     return 0;
 }
@@ -394 +404 @@
             if (!strcmp(pDNSMapingEntry->pszCName, *pszAlias))
             {
-
+                /*
+                 * we need add mappings for real host name, instead of using alias.
+                 * DNS server doesn't return alias list on real name request.
+                 */
                 PDNSMAPPINGENTRY pDnsMapping = RTMemAllocZ(sizeof(DNSMAPPINGENTRY));
                 fMatch = true;