#include <assert.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "msg.h"
#include "dns.h"
#include "list.h"
#include "IO/iowatch.hh"

Include dependency graph for dns.c:

Macros
#define	D_DNS_MAX_SERVERS 1

Enumerations
enum	DnsServerState_t { DNS_SERVER_IDLE , DNS_SERVER_PROCESSING , DNS_SERVER_RESOLVED }

Functions
static void	Dns_timeout_client (int fd, void *data)
	This function is called on the main thread and reads the DNS results.

static void	Dns_queue_add (int channel, const char hostname, DnsCallback_t cb_func, void cb_data)

static int	Dns_queue_find (const char *hostname)
	Find hostname index in dns_queue (if found, returns queue index; -1 if not)

static void	Dns_queue_remove (int index)
	Given an index, remove an entry from the dns_queue.

static void	Dns_cache_add (char hostname, Dlist addr_list)
	Add an IP/hostname pair to Dns-cache.

void	a_Dns_init (void)
	Initializer function.

static void	Dns_note_hosts (Dlist list, struct addrinfo res0)
	Allocate a host structure and add it to the list.

static void *	Dns_server (void *data)
	Server function (runs on its own thread)

static void	Dns_server_req (int channel, const char *hostname)
	Request function (spawn a server and let it handle the request)

void	a_Dns_resolve (const char hostname, DnsCallback_t cb_func, void cb_data)
	Return the IP for the given hostname using a callback.

static void	Dns_serve_channel (int channel)
	Give answer to all queued callbacks on this channel.

static void	Dns_assign_channels (void)
	Assign free channels to waiting clients (-2)

void	a_Dns_freeall (void)
	Dns memory-deallocation.

void	a_Dns_dillohost_to_string (DilloHost host, char dst, size_t size)
	Writes a string representation of the given DilloHost into dst.

Variables
static DnsServer	dns_server [D_DNS_MAX_SERVERS]

static int	num_servers

static GDnsCache *	dns_cache

static int	dns_cache_size

static int	dns_cache_size_max

static GDnsQueue *	dns_queue

static int	dns_queue_size

static int	dns_queue_size_max

static int	dns_notify_pipe [2]

Macro Definition Documentation

◆ D_DNS_MAX_SERVERS

#define D_DNS_MAX_SERVERS 1

Definition at line 50 of file dns.c.

Enumeration Type Documentation

◆ DnsServerState_t

enum DnsServerState_t

Enumerator
DNS_SERVER_IDLE
DNS_SERVER_PROCESSING
DNS_SERVER_RESOLVED

Definition at line 53 of file dns.c.

Function Documentation

◆ a_Dns_dillohost_to_string()

void a_Dns_dillohost_to_string	(	DilloHost *	host,
		char *	dst,
		size_t	size
	)

Writes a string representation of the given DilloHost into dst.

dst will be \0 terminated. Please note that dst must be at least 40 bytes long for IPv6 addresses.

Definition at line 502 of file dns.c.

References DilloHost::af, and DilloHost::data.

Referenced by Dns_server().

◆ a_Dns_freeall()

void a_Dns_freeall ( void )

Dns memory-deallocation.

(Call this one at exit time) The Dns_queue is deallocated at execution time (no need to do that here) 'dns_cache' is the only one that grows dynamically

Definition at line 480 of file dns.c.

References a_IOwatch_remove_fd(), dClose(), dFree(), DIO_READ, dList_free(), dList_length(), dList_nth_data(), dns_cache, dns_cache_size, and dns_notify_pipe.

Referenced by main().