unbound-dnstap-socket.c File Reference

This program listens on a DNSTAP socket for logged messages. More...

#include "config.h"
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <openssl/ssl.h>
#include <openssl/rand.h>
#include <openssl/err.h>
#include "dnstap/dtstream.h"
#include "dnstap/dnstap_fstrm.h"
#include "util/log.h"
#include "util/ub_event.h"
#include "util/net_help.h"
#include "services/listen_dnsport.h"
#include "sldns/sbuffer.h"
#include "sldns/wire2str.h"
#include "sldns/pkthdr.h"
#include "util/config_file.h"
#include "util/data/packed_rrset.h"
#include "daemon/worker.h"
#include "daemon/remote.h"
#include "util/fptr_wlist.h"
#include "libunbound/context.h"

Data Structures
struct	main_tap_data
	main tap callback data More...
struct	tap_data_list
struct	tap_data
	tap callback variables More...
struct	tap_socket_list
	list of sockets More...
struct	tap_socket
	tap socket More...
struct	order_id
	keep track of lock id in lock-verify application More...

Macros
#define	LISTEN_BACKLOG   16
	listen backlog on TCP connections for dnstap logs
#define	unit_tap_datas_max   5

Functions
static void	usage (char *argv[])
	usage information for streamtcp
static void	tap_data_list_try_to_free_tail (struct tap_data_list *list)
	try to delete tail entries from the list if all of them have no data
static void	tap_data_free (struct tap_data *data, int free_tail)
	delete the tap structure
static int	tap_data_list_insert (struct tap_data_list **liststart, struct tap_data *d)
	insert tap_data in the tap_data_list
static void	tap_data_list_delete (struct tap_data_list *list)
	delete the tap_data_list and free any remaining tap_data
static void	tap_socket_delev (struct tap_socket *s)
	del the tap event
static void	tap_socket_close (struct tap_socket *s)
	close the tap socket
static void	tap_socket_delete (struct tap_socket *s)
	delete tap socket
static struct tap_socket *	tap_socket_new_local (char *socketpath, void(*ev_cb)(int, short, void *), void *data)
	create new socket (unconnected, not base-added), or NULL malloc fail
static struct tap_socket *	tap_socket_new_tcpaccept (char *ip, void(*ev_cb)(int, short, void *), void *data)
	create new socket (unconnected, not base-added), or NULL malloc fail
static struct tap_socket *	tap_socket_new_tlsaccept (char *ip, void(*ev_cb)(int, short, void *), void *data, char *server_key, char *server_cert, char *verifypem)
	create new socket (unconnected, not base-added), or NULL malloc fail
static int	make_tcp_accept (char *ip)
	setup tcp accept socket on IP string
static int	tap_socket_setup (struct tap_socket *s, struct ub_event_base *base)
	setup socket on event base
static int	tap_socket_list_insert (struct tap_socket_list **liststart, struct tap_socket *s)
	add tap socket to list
static void	tap_socket_list_delete (struct tap_socket_list *list)
	delete the list
static int	tap_socket_list_addevs (struct tap_socket_list *list, struct ub_event_base *base)
	setup accept events
static ssize_t	receive_bytes (struct tap_data *data, int fd, void *buf, size_t len)
	receive bytes from fd, prints errors if bad, returns 0: closed/error, -1: continue, >0 number of bytes
static ssize_t	tap_receive (struct tap_data *data, void *buf, size_t len)
	receive bytes on the tap connection, prints errors if bad, returns 0: closed/error, -1: continue, >0 number of bytes
static int	reply_with_accept (struct tap_data *data)
	reply with ACCEPT control frame to bidirectional client, returns 0 on error
static int	reply_with_finish (struct tap_data *data)
	reply with FINISH control frame to bidirectional client, returns 0 on error
void	dtio_tap_callback (int ATTR_UNUSED(fd), short ATTR_UNUSED(bits), void *arg)
	callback for dnstap listener
void	dtio_mainfdcallback (int fd, short ATTR_UNUSED(bits), void *arg)
	callback for main listening file descriptor
static void	setup_local_list (struct main_tap_data *maindata, struct config_strlist_head *local_list)
	setup local accept sockets
static void	setup_tcp_list (struct main_tap_data *maindata, struct config_strlist_head *tcp_list)
	setup tcp accept sockets
static void	setup_tls_list (struct main_tap_data *maindata, struct config_strlist_head *tls_list, char *server_key, char *server_cert, char *verifypem)
	setup tls accept sockets
static RETSIGTYPE	main_sigh (int sig)
	signal handler for user quit
static void	setup_and_run (struct config_strlist_head *local_list, struct config_strlist_head *tcp_list, struct config_strlist_head *tls_list, char *server_key, char *server_cert, char *verifypem)
	setup and run the server to listen to DNSTAP messages
static int	internal_unittest ()
int	main (int argc, char **argv)
	main program for streamtcp
void	worker_handle_control_cmd (struct tube *ATTR_UNUSED(tube), uint8_t *ATTR_UNUSED(buffer), size_t ATTR_UNUSED(len), int ATTR_UNUSED(error), void *ATTR_UNUSED(arg))
int	worker_handle_request (struct comm_point *ATTR_UNUSED(c), void *ATTR_UNUSED(arg), int ATTR_UNUSED(error), struct comm_reply *ATTR_UNUSED(repinfo))
int	worker_handle_service_reply (struct comm_point *ATTR_UNUSED(c), void *ATTR_UNUSED(arg), int ATTR_UNUSED(error), struct comm_reply *ATTR_UNUSED(reply_info))
int	remote_accept_callback (struct comm_point *ATTR_UNUSED(c), void *ATTR_UNUSED(arg), int ATTR_UNUSED(error), struct comm_reply *ATTR_UNUSED(repinfo))
int	remote_control_callback (struct comm_point *ATTR_UNUSED(c), void *ATTR_UNUSED(arg), int ATTR_UNUSED(error), struct comm_reply *ATTR_UNUSED(repinfo))
void	worker_sighandler (int ATTR_UNUSED(sig), void *ATTR_UNUSED(arg))
struct outbound_entry *	worker_send_query (struct query_info *ATTR_UNUSED(qinfo), uint16_t ATTR_UNUSED(flags), int ATTR_UNUSED(dnssec), int ATTR_UNUSED(want_dnssec), int ATTR_UNUSED(nocaps), int ATTR_UNUSED(check_ratelimit), struct sockaddr_storage *ATTR_UNUSED(addr), socklen_t ATTR_UNUSED(addrlen), uint8_t *ATTR_UNUSED(zone), size_t ATTR_UNUSED(zonelen), int ATTR_UNUSED(tcp_upstream), int ATTR_UNUSED(ssl_upstream), char *ATTR_UNUSED(tls_auth_name), struct module_qstate *ATTR_UNUSED(q), int *ATTR_UNUSED(was_ratelimited))
void	worker_alloc_cleanup (void *ATTR_UNUSED(arg))
struct outbound_entry *	libworker_send_query (struct query_info *ATTR_UNUSED(qinfo), uint16_t ATTR_UNUSED(flags), int ATTR_UNUSED(dnssec), int ATTR_UNUSED(want_dnssec), int ATTR_UNUSED(nocaps), int ATTR_UNUSED(check_ratelimit), struct sockaddr_storage *ATTR_UNUSED(addr), socklen_t ATTR_UNUSED(addrlen), uint8_t *ATTR_UNUSED(zone), size_t ATTR_UNUSED(zonelen), int ATTR_UNUSED(tcp_upstream), int ATTR_UNUSED(ssl_upstream), char *ATTR_UNUSED(tls_auth_name), struct module_qstate *ATTR_UNUSED(q), int *ATTR_UNUSED(was_ratelimited))
int	libworker_handle_service_reply (struct comm_point *ATTR_UNUSED(c), void *ATTR_UNUSED(arg), int ATTR_UNUSED(error), struct comm_reply *ATTR_UNUSED(reply_info))
void	libworker_handle_control_cmd (struct tube *ATTR_UNUSED(tube), uint8_t *ATTR_UNUSED(buffer), size_t ATTR_UNUSED(len), int ATTR_UNUSED(error), void *ATTR_UNUSED(arg))
void	libworker_fg_done_cb (void *ATTR_UNUSED(arg), int ATTR_UNUSED(rcode), struct sldns_buffer *ATTR_UNUSED(buf), enum sec_status ATTR_UNUSED(s), char *ATTR_UNUSED(why_bogus), int ATTR_UNUSED(was_ratelimited))
void	libworker_bg_done_cb (void *ATTR_UNUSED(arg), int ATTR_UNUSED(rcode), struct sldns_buffer *ATTR_UNUSED(buf), enum sec_status ATTR_UNUSED(s), char *ATTR_UNUSED(why_bogus), int ATTR_UNUSED(was_ratelimited))
void	libworker_event_done_cb (void *ATTR_UNUSED(arg), int ATTR_UNUSED(rcode), struct sldns_buffer *ATTR_UNUSED(buf), enum sec_status ATTR_UNUSED(s), char *ATTR_UNUSED(why_bogus), int ATTR_UNUSED(was_ratelimited))
int	context_query_cmp (const void *ATTR_UNUSED(a), const void *ATTR_UNUSED(b))
void	worker_stat_timer_cb (void *ATTR_UNUSED(arg))
void	worker_probe_timer_cb (void *ATTR_UNUSED(arg))
void	worker_start_accept (void *ATTR_UNUSED(arg))
void	worker_stop_accept (void *ATTR_UNUSED(arg))
int	order_lock_cmp (const void *e1, const void *e2)
	Due to module breakage by fptr wlist, these test app declarations are presented here. More...
int	codeline_cmp (const void *a, const void *b)
	compare two codeline structs for rbtree from memstats test app More...
int	replay_var_compare (const void *ATTR_UNUSED(a), const void *ATTR_UNUSED(b))
void	remote_get_opt_ssl (char *ATTR_UNUSED(str), void *ATTR_UNUSED(arg))

Variables
static int	longformat = 0
	long format option, for multiline printout per message
static struct ub_event_base *	sig_base = NULL
	signal variable
int	sig_quit = 0
	do we have to quit
int	optind
	getopt global, in case header files fail to declare it.
char *	optarg
	getopt global, in case header files fail to declare it.

Detailed Description

This program listens on a DNSTAP socket for logged messages.

Function Documentation

order_lock_cmp()

int order_lock_cmp	(	const void *	e1,
		const void *	e2
	)

Due to module breakage by fptr wlist, these test app declarations are presented here.

compare two order_ids from lock-verify test app

Parameters

e1	first order_id
e2	second order_id

Returns

compare code -1, 0, +1 (like memcmp).

References order_id::instance, and order_id::thr.

codeline_cmp()

int codeline_cmp	(	const void *	a,
		const void *	b
	)

compare two codeline structs for rbtree from memstats test app

Parameters

a	codeline
b	codeline

Returns

compare code -1, 0, +1 (like memcmp).