implements the main part of the DNS resolver component More...

#include "jabberd.h"
#include "srv_resolv.h"
#include <sys/wait.h>

Data Structures
struct	__dns_resend_list_host_list
	structure to build a list that holds all hosts to which the packets are resent for a service More...
struct	__dns_resend_list
struct	dns_io
struct	__dns_packet_list
Typedefs
typedef struct __dns_resend_list_host_list *	dns_resend_list_host_list
	structure to build a list that holds all hosts to which the packets are resent for a service
typedef struct __dns_resend_list_host_list	_dns_resend_list_host_list
typedef struct __dns_resend_list *	dns_resend_list
typedef struct __dns_resend_list	_dns_resend_list
typedef struct dns_io	_dns_io
typedef int(*	RESOLVEFUNC )(dns_io di)
typedef struct __dns_packet_list *	dns_packet_list
typedef struct __dns_packet_list	_dns_packet_list
Functions
void	_dnsrv_signal (int sig)
void	dnsrv_child_process_xstream_io (int type, xmlnode x, void *args)
int	dnsrv_child_main (dns_io di)
int	dnsrv_fork_and_capture (RESOLVEFUNC f, dns_io di)
void	dnsrv_resend (xmlnode pkt, char ip, char to)
void	dnsrv_lookup (dns_io d, dpacket p)
result	dnsrv_deliver (instance i, dpacket p, void *args)
void	dnsrv_process_xstream_io (int type, xmlnode x, void *arg)
void *	dnsrv_process_io (void *threadarg)
void *	dnsrv_thread (void *arg)
void	_dnsrv_beat_packets (xht h, const char key, void data, void *arg)
result	dnsrv_beat_packets (void *arg)
void	dnsrv (instance i, xmlnode x)

Detailed Description

implements the main part of the DNS resolver component

Config format: <dnsrv xmlns='jabber:config:dnsrv'> <resend service="_jabber._tcp">s2s-component</resend> </dnsrv>

Note: You must specify the services in the order you want them tried

Typedef Documentation

typedef struct dns_io _dns_io

typedef struct __dns_packet_list _dns_packet_list

typedef struct __dns_resend_list _dns_resend_list

typedef struct __dns_resend_list_host_list _dns_resend_list_host_list

typedef struct __dns_packet_list * dns_packet_list

struct to store list of dpackets which need to be delivered

typedef struct __dns_resend_list * dns_resend_list

struct to store list of services and resend hosts

typedef struct __dns_resend_list_host_list * dns_resend_list_host_list

structure to build a list that holds all hosts to which the packets are resent for a service

typedef int(* RESOLVEFUNC)(dns_io di)

prototype for the resolver function

Parameters:

di	pointer to the instance global data

Function Documentation

void _dnsrv_beat_packets	(	xht	h,
		const char *	key,
		void *	data,
		void *	arg
	)

References deliver_fail(), dpacket_struct::host, log_notice(), N_, __dns_packet_list::next, __dns_packet_list::packet, dns_io::packet_table, dns_io::packet_timeout, __dns_packet_list::stamp, and xhash_zap().

Referenced by dnsrv_beat_packets().

void _dnsrv_signal ( int sig )

signal handler: just die after any signal

Parameters:

sig	the signal number that has been sent

Referenced by dnsrv_fork_and_capture().

void dnsrv	(	instance	i,
		xmlnode	x
	)

References dnsrv_beat_packets(), dnsrv_deliver(), dnsrv_process_io(), dnsrv_thread(), __dns_resend_list_host_list::host, __dns_resend_list::hosts, instance_struct::id, j_atoi(), j_strcmp(), jid_new(), log_debug2, log_error, LOGT_CONFIG, LOGT_INIT, dns_io::mempool, __dns_resend_list::next, __dns_resend_list_host_list::next, NS_JABBERD_CONFIG_DNSRV, o_DELIVER, instance_struct::p, dns_io::packet_table, dns_io::packet_timeout, pmalloco(), pool_cleanup(), pstrdup(), register_beat(), register_phandler(), __dns_resend_list::service, dns_io::svclist, __dns_resend_list_host_list::weight, __dns_resend_list::weight_sum, xdb_cache(), xdb_get(), xhash_free(), xhash_new(), xmlnode_free(), xmlnode_get_attrib_ns(), xmlnode_get_data(), xmlnode_get_lastchild(), xmlnode_get_localname(), xmlnode_get_namespace(), xmlnode_get_prevsibling(), xmlnode_pool(), xmlnode_serialize_string(), and ZONE.

result dnsrv_beat_packets ( void * arg )

References _dnsrv_beat_packets(), dns_io::packet_table, r_DONE, and xhash_walk().

Referenced by dnsrv().

int dnsrv_child_main ( dns_io di )

References dnsrv_child_process_xstream_io(), dns_io::in, log_debug2, LOGT_CLEANUP, LOGT_INIT, LOGT_IO, LOGT_STRANGE, dns_io::out, pool_free(), pool_new, xstream_eat(), xstream_new(), XSTREAM_NODE, and ZONE.

Referenced by dnsrv_process_io(), and dnsrv_thread().

void dnsrv_child_process_xstream_io	(	int	type,
		xmlnode	x,
		void *	args
	)

result dnsrv_deliver	(	instance	i,
		dpacket	p,
		void *	args
	)

int dnsrv_fork_and_capture	(	RESOLVEFUNC	f,
		dns_io	di
	)

References _dnsrv_signal(), dns_io::in, and dns_io::out.

Referenced by dnsrv_process_io(), and dnsrv_thread().

void dnsrv_lookup	(	dns_io	d,
		dpacket	p
	)

void* dnsrv_process_io ( void * threadarg )

References dnsrv_child_main(), dnsrv_fork_and_capture(), dnsrv_process_xstream_io(), dns_io::in, log_debug2, LOGT_INIT, LOGT_IO, LOGT_STRANGE, dns_io::mempool, dns_io::out, dns_io::pid, xstream_eat(), xstream_new(), XSTREAM_NODE, and ZONE.

Referenced by dnsrv().

void dnsrv_process_xstream_io	(	int	type,
		xmlnode	x,
		void *	arg
	)

References dns_io::cache_table, dnsrv_resend(), log_debug2, LOGT_IO, __dns_packet_list::next, __dns_packet_list::packet, dns_io::packet_table, dpacket_struct::x, xhash_get(), xhash_put(), xhash_zap(), xmlnode_free(), xmlnode_get_attrib_ns(), xmlnode_get_data(), xmlnode_put_attrib(), xmlnode_serialize_string(), XSTREAM_NODE, and ZONE.

Referenced by dnsrv_process_io().

void dnsrv_resend	(	xmlnode	pkt,
		char *	ip,
		char *	to
	)

References deliver(), dpacket_new(), jutil_error_xmpp(), log_debug2, LOGT_IO, N_, xmlnode_get_attrib_ns(), xmlnode_put_attrib_ns(), xmlnode_wrap_ns(), and ZONE.

Referenced by dnsrv_deliver(), and dnsrv_process_xstream_io().

void* dnsrv_thread ( void * arg )

References dnsrv_child_main(), dnsrv_fork_and_capture(), and dns_io::pid.

Referenced by dnsrv().

Data Structures

Typedefs

Functions

Detailed Description

Typedef Documentation

Function Documentation