lwres_gabnrequest_free man page on GhostBSD

Man page or keyword search:  
man Server   9747 pages
apropos Keyword Search (all sections)
Output format
GhostBSD logo
[printable version]

LWRES_GABN(3)			     BIND9			 LWRES_GABN(3)

NAME
       lwres_gabnrequest_render, lwres_gabnresponse_render,
       lwres_gabnrequest_parse, lwres_gabnresponse_parse,
       lwres_gabnresponse_free, lwres_gabnrequest_free - lightweight resolver
       getaddrbyname message handling

SYNOPSIS
       #include <lwres/lwres.h>

       lwres_result_t lwres_gabnrequest_render(lwres_context_t *ctx,
					       lwres_gabnrequest_t *req,
					       lwres_lwpacket_t *pkt,
					       lwres_buffer_t *b);

       lwres_result_t lwres_gabnresponse_render(lwres_context_t *ctx,
						lwres_gabnresponse_t *req,
						lwres_lwpacket_t *pkt,
						lwres_buffer_t *b);

       lwres_result_t lwres_gabnrequest_parse(lwres_context_t *ctx,
					      lwres_buffer_t *b,
					      lwres_lwpacket_t *pkt,
					      lwres_gabnrequest_t **structp);

       lwres_result_t lwres_gabnresponse_parse(lwres_context_t *ctx,
					       lwres_buffer_t *b,
					       lwres_lwpacket_t *pkt,
					       lwres_gabnresponse_t **structp);

       void lwres_gabnresponse_free(lwres_context_t *ctx,
				    lwres_gabnresponse_t **structp);

       void lwres_gabnrequest_free(lwres_context_t *ctx,
				   lwres_gabnrequest_t **structp);

DESCRIPTION
       These are low-level routines for creating and parsing lightweight
       resolver name-to-address lookup request and response messages.

       There are four main functions for the getaddrbyname opcode. One render
       function converts a getaddrbyname request structure —
       lwres_gabnrequest_t — to the lighweight resolver's canonical format. It
       is complemented by a parse function that converts a packet in this
       canonical format to a getaddrbyname request structure. Another render
       function converts the getaddrbyname response structure —
       lwres_gabnresponse_t — to the canonical format. This is complemented by
       a parse function which converts a packet in canonical format to a
       getaddrbyname response structure.

       These structures are defined in <lwres/lwres.h>. They are shown below.

	   #define LWRES_OPCODE_GETADDRSBYNAME	   0x00010001U

	   typedef struct lwres_addr lwres_addr_t;
	   typedef LWRES_LIST(lwres_addr_t) lwres_addrlist_t;

	   typedef struct {
		   lwres_uint32_t  flags;
		   lwres_uint32_t  addrtypes;
		   lwres_uint16_t  namelen;
		   char		  *name;
	   } lwres_gabnrequest_t;

	   typedef struct {
		   lwres_uint32_t	   flags;
		   lwres_uint16_t	   naliases;
		   lwres_uint16_t	   naddrs;
		   char			  *realname;
		   char			 **aliases;
		   lwres_uint16_t	   realnamelen;
		   lwres_uint16_t	  *aliaslen;
		   lwres_addrlist_t	   addrs;
		   void			  *base;
		   size_t		   baselen;
	   } lwres_gabnresponse_t;

       lwres_gabnrequest_render() uses resolver context ctx to convert
       getaddrbyname request structure req to canonical format. The packet
       header structure pkt is initialised and transferred to buffer b. The
       contents of *req are then appended to the buffer in canonical format.
       lwres_gabnresponse_render() performs the same task, except it converts
       a getaddrbyname response structure lwres_gabnresponse_t to the
       lightweight resolver's canonical format.

       lwres_gabnrequest_parse() uses context ctx to convert the contents of
       packet pkt to a lwres_gabnrequest_t structure. Buffer b provides space
       to be used for storing this structure. When the function succeeds, the
       resulting lwres_gabnrequest_t is made available through *structp.
       lwres_gabnresponse_parse() offers the same semantics as
       lwres_gabnrequest_parse() except it yields a lwres_gabnresponse_t
       structure.

       lwres_gabnresponse_free() and lwres_gabnrequest_free() release the
       memory in resolver context ctx that was allocated to the
       lwres_gabnresponse_t or lwres_gabnrequest_t structures referenced via
       structp. Any memory associated with ancillary buffers and strings for
       those structures is also discarded.

RETURN VALUES
       The getaddrbyname opcode functions lwres_gabnrequest_render(),
       lwres_gabnresponse_render() lwres_gabnrequest_parse() and
       lwres_gabnresponse_parse() all return LWRES_R_SUCCESS on success. They
       return LWRES_R_NOMEMORY if memory allocation fails.
       LWRES_R_UNEXPECTEDEND is returned if the available space in the buffer
       b is too small to accommodate the packet header or the
       lwres_gabnrequest_t and lwres_gabnresponse_t structures.
       lwres_gabnrequest_parse() and lwres_gabnresponse_parse() will return
       LWRES_R_UNEXPECTEDEND if the buffer is not empty after decoding the
       received packet. These functions will return LWRES_R_FAILURE if
       pktflags in the packet header structure lwres_lwpacket_t indicate that
       the packet is not a response to an earlier query.

SEE ALSO
       lwres_packet(3)

COPYRIGHT
       Copyright © 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
       Copyright © 2000, 2001 Internet Software Consortium.

BIND9				 Jun 30, 2000			 LWRES_GABN(3)
[top]

List of man pages available for GhostBSD

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net