gnunet-resolver.c File Reference

tool to test resolver More...

#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_resolver_service.h"

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Macros
#define	GET_TIMEOUT   GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)

Functions
static void	print_hostname (void *cls, const char *hostname)
	Prints each hostname obtained from DNS. More...
static void	print_sockaddr (void *cls, const struct sockaddr *addr, socklen_t addrlen)
	Callback function to display address. More...
static void	run (void *cls, char *const *args, const char *cfgfile, const struct GNUNET_CONFIGURATION_Handle *cfg)
	Main function that will be run by the scheduler. More...
int	main (int argc, char *const *argv)
	The main function to access GNUnet's DNS resolver. More...

Variables
static int	reverse
	Flag for reverse lookup. More...

Detailed Description

tool to test resolver

Author

Christian Grothoff

Definition in file gnunet-resolver.c.

Macro Definition Documentation

GET_TIMEOUT

#define GET_TIMEOUT   GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)

Definition at line 31 of file gnunet-resolver.c.

Function Documentation

print_hostname()

static void print_hostname ( void *  cls, const char *  hostname  )

static

Prints each hostname obtained from DNS.

Parameters

cls	closure (unused)
hostname	one of the names for the host, NULL on the last call to the callback

Definition at line 47 of file gnunet-resolver.c.

{
  (void) cls;
  if (NULL == hostname)
    return;
  fprintf (stdout,
           "%s\n",
           hostname);
}

Referenced by run().

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print_sockaddr()

static void print_sockaddr ( void *  cls, const struct sockaddr *  addr, socklen_t  addrlen  )

static

Callback function to display address.

Parameters

cls	closure (unused)
addr	one of the addresses of the host, NULL for the last address
addrlen	length of the address

Definition at line 67 of file gnunet-resolver.c.

{
  (void) cls;
  if (NULL == addr)
    return;
  fprintf (stdout,
           "%s\n",
           GNUNET_a2s (addr,
                       addrlen));
}

References GNUNET_a2s().

Referenced by run().

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run()

static void run ( void *  cls, char *const *  args, const char *  cfgfile, const struct GNUNET_CONFIGURATION_Handle *  cfg  )

static

Main function that will be run by the scheduler.

Parameters

cls	closure
args	remaining command-line arguments
cfgfile	name of the configuration file used (for saving, can be NULL!)
cfg	configuration

Definition at line 90 of file gnunet-resolver.c.

{
  const struct sockaddr *sa;
  socklen_t salen;
  struct sockaddr_in v4;
  struct sockaddr_in6 v6;
 
  (void) cls;
  (void) cfgfile;
  (void) cfg;
  if (NULL == args[0])
    return;
  if (! reverse)
  {
    GNUNET_RESOLVER_ip_get (args[0],
                            AF_UNSPEC,
                            GET_TIMEOUT,
                            &print_sockaddr,
                            NULL);
    return;
  }
 
  sa = NULL;
  memset (&v4, 0, sizeof(v4));
  v4.sin_family = AF_INET;
#if HAVE_SOCKADDR_IN_SIN_LEN
  v4.sin_len = sizeof(v4);
#endif
  if (1 == inet_pton (AF_INET,
                      args[0],
                      &v4.sin_addr))
  {
    sa = (struct sockaddr *) &v4;
    salen = sizeof(v4);
  }
  memset (&v6, 0, sizeof(v6));
  v6.sin6_family = AF_INET6;
#if HAVE_SOCKADDR_IN_SIN_LEN
  v6.sin6_len = sizeof(v6);
#endif
  if (1 == inet_pton (AF_INET6,
                      args[0],
                      &v6.sin6_addr))
  {
    sa = (struct sockaddr *) &v6;
    salen = sizeof(v6);
  }
  if (NULL == sa)
  {
    fprintf (stderr,
             "`%s' is not a valid IP: %s\n",
             args[0],
             strerror (errno));
    return;
  }
  GNUNET_RESOLVER_hostname_get (sa, salen,
                                GNUNET_YES,
                                GET_TIMEOUT,
                                &print_hostname,
                                NULL);
}

References consensus-simulation::args, cfg, GET_TIMEOUT, GNUNET_RESOLVER_hostname_get(), GNUNET_RESOLVER_ip_get(), GNUNET_YES, print_hostname(), print_sockaddr(), and reverse.

Referenced by main().

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main()

int main	(	int	argc,
		char *const *	argv
	)

The main function to access GNUnet's DNS resolver.

Parameters

argc	number of arguments from the command line
argv	command line arguments

Returns

0 ok, 1 on error

Definition at line 164 of file gnunet-resolver.c.

{
  struct GNUNET_GETOPT_CommandLineOption options[] = {
    GNUNET_GETOPT_option_flag ('r',
                               "reverse",
                               gettext_noop ("perform a reverse lookup"),
                               &reverse),
    GNUNET_GETOPT_OPTION_END
  };
  int ret;
 
  if (GNUNET_OK !=
      GNUNET_STRINGS_get_utf8_args (argc, argv,
                                    &argc, &argv))
    return 2;
 
  ret = (GNUNET_OK ==
         GNUNET_PROGRAM_run (argc, argv,
                             "gnunet-resolver [hostname]",
                             gettext_noop ("Use built-in GNUnet stub resolver"),
                             options,
                             &run, NULL)) ? 0 : 1;
  GNUNET_free_nz ((void *) argv);
  return ret;
}

References gettext_noop, GNUNET_free_nz, GNUNET_GETOPT_OPTION_END, GNUNET_GETOPT_option_flag(), GNUNET_OK, GNUNET_PROGRAM_run(), GNUNET_STRINGS_get_utf8_args(), options, ret, reverse, and run().

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Variable Documentation

reverse

int reverse

static

Flag for reverse lookup.

Definition at line 36 of file gnunet-resolver.c.

Referenced by main(), and run().