NetworkPkg: Code logic optimization for DnsDxe and HttpDxe driver
Revise some errors which may lead NULL pointer be dereferenced: * DnsDhcp.c: Paralist may be used without any initialized * DnsHeader and RcvString may be null but be dereferenced * HttpDriver.c: revise an if judgment * HttpImpl.c: add a judgment to avoid null dereferenced Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: fanwang2 <fan.wang@intel.com> Reviewed-by: Ye Ting <ting.ye@intel.com> Reviewed-by: Jiaxin Wu <jiaxin.wu@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17923 6f19259b-4bc3-4df7-8a09-765794883524
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@@ -1049,6 +1049,7 @@ IsValidDnsResponse (
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continue;
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} else {
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TxString = NetbufGetByte (Packet, 0, NULL);
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ASSERT (TxString != NULL);
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DnsHeader = (DNS_HEADER *) TxString;
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QueryName = (CHAR8 *) (TxString + sizeof (*DnsHeader));
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QuerySection = (DNS_QUERY_SECTION *) (QueryName + AsciiStrLen (QueryName) + 1);
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@@ -1426,7 +1427,8 @@ DnsOnPacketReceived (
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ASSERT (Packet != NULL);
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RcvString = NetbufGetByte (Packet, 0, NULL);
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ASSERT (RcvString != NULL);
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//
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// Parse Dns Response
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//
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