1  #ifndef _DNSREDIR_H
 2  #define _DNSREDIR_H
 3  #include <stdint.h>
 4  
 5  typedef struct conntrack_info {
 6      uint8_t  is_ipv6;
 7      uint32_t srcip[4];
 8      uint16_t srcport;
 9      uint32_t dstip[4];
10      uint16_t dstport;
11  } conntrack_info_t;
12  
13  inline static void ipv4_copy_addr(uint32_t dst[4], const uint32_t src[4]) {
14      dst[0] = src[0];
15      dst[1] = 0;
16      dst[2] = 0;
17      dst[3] = 0;
18  }
19  
20  inline static void ipv6_copy_addr(uint32_t dst[4], const uint32_t src[4]) {
21      dst[0] = src[0];
22      dst[1] = src[1];
23      dst[2] = src[2];
24      dst[3] = src[3];
25  }
26  
27  int dns_handle_incoming(const uint32_t srcip[4], const uint16_t srcport,
28                          const char *packet_data, const UINT packet_dataLen,
29                          conntrack_info_t *conn_info, const uint8_t is_ipv6);
30  
31  int dns_handle_outgoing(const uint32_t srcip[4], const uint16_t srcport,
32                          const uint32_t dstip[4], const uint16_t dstport,
33                          const char *packet_data, const UINT packet_dataLen,
34                          const uint8_t is_ipv6
35                         );
36  
37  void flush_dns_cache();
38  int dns_is_dns_packet(const char *packet_data, const UINT packet_dataLen, const int outgoing);
39  #endif