val_getaddrinfo

val_getaddrinfo(3)            Programmer's Manual           val_getaddrinfo(3)



NAME
       val_getaddrinfo() - get DNSSEC-validated network address and service
       translation

SYNOPSIS
         #include <validator/validator.h>

         int val_getaddrinfo(const struct val_context *ctx,
                             const char *nodename,
                             const char *servname,
                             const struct addrinfo *hints,
                             struct addrinfo **res,
                             val_status_t * val_status);

         int val_getnameinfo(val_context_t * ctx,
                             const struct sockaddr *sa,
                             socklen_t salen,
                             char *host,
                             size_t hostlen,
                             char *serv,
                             size_t servlen,
                             int flags,
                             val_status_t * val_status);

DESCRIPTION
       val_getaddrinfo() and val_getnameinfo perform DNSSEC validation of DNS
       queries.  They are intended to be DNSSEC-aware replacements for
       getaddrinfo(3) and getnameinfo(3).

       val_getaddrinfo()  returns a network address value of type struct
       addrinfo in the res parameter.  val_getnameinfo is used to convert a
       sockaddr structure to a pair of host name and service strings.

       val_status gives the combined validation status value for all answers
       returned by the each of the functions.  val_istrusted() and
       val_isvalidated() can be used to determine the trustworthiness of data
       and p_val_status() can be used to display the status value to the user
       in ASCII format (See libval(3) more for information).

       The ctx parameter specifies the validation context, which can be set to
       NULL for default values (see libval(3) and dnsval.conf for more details
       on validation contexts and validation policy).

       The nodename, servname, and hints parameters have similar syntax and
       semantics as the corresponding parameters for the original
       getaddrinfo() function.  The res parameter is similar to the res
       parameter for getaddrinfo().  Please see the manual page for
       getaddrinfo(3) for more details about these parameters.

RETURN VALUES
       The val_getaddrinfo() function returns 0 on success and a non-zero
       error code on failure.  *res will point to a dynamically allocated
       linked list of addrinfo structures on success and will be NULL if no
       answer was available.

       The val_status parameter gives an indication for trustworthiness of
       data. If *res is NULL, this value gives an indication of whether the
       non-existence of data can be trusted or not.

EXAMPLE
        #include <stdio.h>
        #include <stdlib.h>
        #include <validator.h>

        int main(int argc, char *argv[])
        {
                 struct addrinfo *ainfo = NULL;
                 int retval;

                 if (argc < 2) {
                         printf("Usage: %s <hostname>\n", argv[0]);
                         exit(1);
                 }

                 retval = val_getaddrinfo(NULL, argv[1], NULL, NULL, &ainfo);

                 if ((retval == 0) && (ainfo != NULL)) {

                         printf("Validation Status = %d [%s]\n",
                                ainfo->ai_val_status,
                                p_val_status(ainfo->ai_val_status));

                         val_freeaddrinfo(ainfo);
                 }

                 return 0;
        }

COPYRIGHT
       Copyright 2004-2013 SPARTA, Inc.  All rights reserved.  See the COPYING
       file included with the DNSSEC-Tools package for details.

AUTHORS
       Abhijit Hayatnagarkar, Michael Baer

SEE ALSO
       getaddrinfo(3)

       val_gethostbyname(3), val_res_query(3)

       libval(3)

       http://www.dnssec-tools.org



perl v5.18.4                      2015-04-27                val_getaddrinfo(3)