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Added the function to save the DNS query log on the packet logs. (fix)

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This commit is contained in:
Daiyuu Nobori 2017-12-22 07:26:06 +09:00
parent a0b54d7c6d
commit ce3d35c595
1 changed files with 44 additions and 0 deletions
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44
src/Mayaqua/TcpIp.c
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@ -3113,6 +3113,50 @@ bool ParseDnsQuery(char *name, UINT name_size, void *data, UINT data_size)
} }
} }
// DNS parsing
void ParseDNS(PKT *p, UCHAR *buf, UINT size)
{
UCHAR *query_data;
UINT query_data_size;
DNSV4_HEADER *dns;
char hostname[MAX_SIZE];
if (p == NULL|| buf == NULL)
{
return;
}
if (size < sizeof(DNSV4_HEADER))
{
return;
}
dns = (DNSV4_HEADER *)buf;
if ((dns->Flag1 & 78) != 0 || (dns->Flag1 & 0x80) != 0)
{
// Illegal opcode
return;
}
if (Endian16(dns->NumQuery) != 1)
{
// Number of queries is invalid
return;
}
query_data = ((UCHAR *)dns) + sizeof(DNSV4_HEADER);
query_data_size = size - sizeof(DNSV4_HEADER);
// Interpret the query
if (ParseDnsQuery(hostname, sizeof(hostname), query_data, query_data_size) == false)
{
// Interpretation fails
return;
}
StrCpy(p->DnsQueryHost, sizeof(p->DnsQueryHost), hostname);
p->TypeL7 = L7_DNS;
}
// UDP parsing // UDP parsing
bool ParseUDP(PKT *p, UCHAR *buf, UINT size) bool ParseUDP(PKT *p, UCHAR *buf, UINT size)
{ {