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lokinet/llarp/dns.hpp
2018-07-27 14:07:22 +10:00

89 lines
1.6 KiB
C++

#ifndef LIBLLARP_DNS_HPP
#define LIBLLARP_DNS_HPP
#include <llarp/dns.h>
#include <sys/types.h> // for uint & ssize_t
#include <map>
#include <string>
struct dns_tracker
{
// uint c_responses;
uint c_requests;
std::map< uint, dnsc_answer_request * > client_request;
// FIXME: support multiple dns server contexts
dnsd_context *dnsd;
// std::map< uint, dnsd_question_request * > daemon_request;
};
// protocol parsing/writing structures & functions
struct dns_msg_header
{
uint16_t id;
uint8_t qr : 1;
uint8_t opcode : 4;
uint8_t aa : 1;
uint8_t tc : 1;
uint8_t rd : 1;
uint8_t ra : 1;
uint8_t z : 1;
uint8_t ad : 1;
uint8_t cd : 1;
uint8_t rcode : 4;
uint16_t qdCount;
uint16_t anCount;
uint16_t nsCount;
uint16_t arCount;
};
struct dns_msg_question
{
std::string name;
uint16_t type;
uint16_t qClass;
};
struct dns_msg_answer
{
std::string name;
uint16_t type;
uint16_t aClass;
uint32_t ttl;
uint16_t rdLen;
uint8_t *rData;
};
extern "C"
{
uint16_t
get16bits(const char *&buffer) throw();
uint32_t
get32bits(const char *&buffer) throw();
dns_msg_header *
decode_hdr(const char *buffer);
dns_msg_question *
decode_question(const char *buffer);
dns_msg_answer *
decode_answer(const char *buffer);
void
put16bits(char *&buffer, uint16_t value) throw();
void
put32bits(char *&buffer, uint32_t value) throw();
void
code_domain(char *&buffer, const std::string &domain) throw();
void
llarp_handle_dns_recvfrom(struct llarp_udp_io *udp,
const struct sockaddr *saddr, const void *buf,
ssize_t sz);
}
#endif