lwres_gnbaresponse_render man page on FreeBSD

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

LWRES_GNBA(3)			     BIND9			 LWRES_GNBA(3)

NAME
       lwres_gnbarequest_render, lwres_gnbaresponse_render,
       lwres_gnbarequest_parse, lwres_gnbaresponse_parse,
       lwres_gnbaresponse_free, lwres_gnbarequest_free - lightweight resolver
       getnamebyaddress message handling

SYNOPSIS
       #include <lwres/lwres.h>

       lwres_result_t lwres_gnbarequest_render(lwres_context_t *ctx,
					       lwres_gnbarequest_t *req,
					       lwres_lwpacket_t *pkt,
					       lwres_buffer_t *b);

       lwres_result_t lwres_gnbaresponse_render(lwres_context_t *ctx,
						lwres_gnbaresponse_t *req,
						lwres_lwpacket_t *pkt,
						lwres_buffer_t *b);

       lwres_result_t lwres_gnbarequest_parse(lwres_context_t *ctx,
					      lwres_buffer_t *b,
					      lwres_lwpacket_t *pkt,
					      lwres_gnbarequest_t **structp);

       lwres_result_t lwres_gnbaresponse_parse(lwres_context_t *ctx,
					       lwres_buffer_t *b,
					       lwres_lwpacket_t *pkt,
					       lwres_gnbaresponse_t **structp);

       void lwres_gnbaresponse_free(lwres_context_t *ctx,
				    lwres_gnbaresponse_t **structp);

       void lwres_gnbarequest_free(lwres_context_t *ctx,
				   lwres_gnbarequest_t **structp);

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

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

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

	   #define LWRES_OPCODE_GETNAMEBYADDR	   0x00010002U

	   typedef struct {
		   lwres_uint32_t  flags;
		   lwres_addr_t	   addr;
	   } lwres_gnbarequest_t;

	   typedef struct {
		   lwres_uint32_t  flags;
		   lwres_uint16_t  naliases;
		   char		  *realname;
		   char		 **aliases;
		   lwres_uint16_t  realnamelen;
		   lwres_uint16_t *aliaslen;
		   void		  *base;
		   size_t	   baselen;
	   } lwres_gnbaresponse_t;

       lwres_gnbarequest_render() uses resolver context ctx to convert
       getnamebyaddr 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_gnbaresponse_render() performs the same task, except it converts
       a getnamebyaddr response structure lwres_gnbaresponse_t to the
       lightweight resolver's canonical format.

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

       lwres_gnbaresponse_free() and lwres_gnbarequest_free() release the
       memory in resolver context ctx that was allocated to the
       lwres_gnbaresponse_t or lwres_gnbarequest_t structures referenced via
       structp. Any memory associated with ancillary buffers and strings for
       those structures is also discarded.

RETURN VALUES
       The getnamebyaddr opcode functions lwres_gnbarequest_render(),
       lwres_gnbaresponse_render() lwres_gnbarequest_parse() and
       lwres_gnbaresponse_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_gnbarequest_t and lwres_gnbaresponse_t structures.
       lwres_gnbarequest_parse() and lwres_gnbaresponse_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_GNBA(3)
[top]

List of man pages available for FreeBSD

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