utils.c File Reference

A bunch of miscellaneous functions, mostly file conversions. More...

#include "utils.h"
#include "../misc/plugutils.h"
#include "../misc/scanneraux.h"
#include <errno.h>
#include <gvm/base/prefs.h>
#include <gvm/boreas/cli.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/wait.h>

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Macros
#define	G_LOG_DOMAIN   "sd main"
	GLib log domain.

Functions
static void	files_add_translation (struct scan_globals *globals, const char *file_hash, char *contents)
	Adds a 'translation' entry for a file sent by the client.
static void	files_add_size_translation (struct scan_globals *globals, const char *file_hash, const long filesize)
	Adds a 'content size' entry for a file sent by the client.
int	store_file (struct scan_globals *globals, const char *file, const char *file_hash)
	Stores a file type preference in a hash table.
int	get_max_hosts_number (void)
int	get_max_checks_number (void)
int	process_alive (pid_t pid)
int	data_left (int soc)
void	wait_for_children1 (void)
int	is_scanner_only_pref (const char *pref)

Variables
int	global_max_hosts
int	global_max_checks

Detailed Description

A bunch of miscellaneous functions, mostly file conversions.

Definition in file utils.c.

Macro Definition Documentation

G_LOG_DOMAIN

#define G_LOG_DOMAIN   "sd main"

GLib log domain.

Definition at line 33 of file utils.c.

Function Documentation

data_left()

int data_left

(

int

soc

)

Definition at line 208 of file utils.c.

{
  int data = 0;
  ioctl (soc, FIONREAD, &data);
  return data;
}

files_add_size_translation()

static void files_add_size_translation ( struct scan_globals *  globals, const char *  file_hash, const long  filesize  )

static

Adds a 'content size' entry for a file sent by the client.

Files sent by the client are stored in memory on the server side. Because they may be binary we need to store the size of the uploaded file as well. This function sets up a mapping from the original name sent by the client to the file size.

Parameters

globals	Global struct.
file_hash	hash to reference the file.
filesize	Size of the file in bytes.

Definition at line 75 of file utils.c.

{
  GHashTable *trans = globals->files_size_translation;
  gchar *filesize_str = g_strdup_printf ("%ld", filesize);
 
  // Register the mapping table if none there yet
  if (trans == NULL)
    {
      trans = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
      globals->files_size_translation = trans;
    }
 
  g_hash_table_insert (trans, g_strdup (file_hash), g_strdup (filesize_str));
}

References scan_globals::files_size_translation.

Referenced by store_file().

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files_add_translation()

static void files_add_translation ( struct scan_globals *  globals, const char *  file_hash, char *  contents  )

static

Adds a 'translation' entry for a file sent by the client.

Files sent by the client are stored in memory on the server side. In order to access these files, their original name ('local' to the client) can be 'translated' into the file contents of the in-memory copy of the file on the server side.

Parameters

globals	Global struct.
file_hash	hash to reference the file.
contents	Contents of the file.

Definition at line 48 of file utils.c.

{
  GHashTable *trans = globals->files_translation;
  // Register the mapping table if none there yet
  if (trans == NULL)
    {
      trans = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
      globals->files_translation = trans;
    }
 
  g_hash_table_insert (trans, g_strdup (file_hash), contents);
}

References scan_globals::files_translation.

Referenced by store_file().

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get_max_checks_number()

int get_max_checks_number

(

void

)

Get the max number of plugins to launch against the remote host at the same time

Definition at line 165 of file utils.c.

{
  int max_checks;
  if (prefs_get ("max_checks"))
    {
      max_checks = atoi (prefs_get ("max_checks"));
      if (max_checks <= 0)
        {
          g_debug ("Error ! max_hosts = %d -- check %s", max_checks,
                   (char *) prefs_get ("config_file"));
          max_checks = global_max_checks;
        }
      else if (max_checks > global_max_checks)
        {
          g_debug ("Client tried to raise the maximum checks number - %d."
                   " Using %d. Change 'max_checks' in openvas.conf if you"
                   " believe this is incorrect",
                   max_checks, global_max_checks);
          max_checks = global_max_checks;
        }
    }
  else
    max_checks = global_max_checks;
  return (max_checks);
}

References global_max_checks.

Referenced by attack_network(), and pluginlaunch_init().

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get_max_hosts_number()

int get_max_hosts_number

(

void

)

Get the max number of hosts to test at the same time.

Definition at line 134 of file utils.c.

{
  int max_hosts;
  if (prefs_get ("max_hosts"))
    {
      max_hosts = atoi (prefs_get ("max_hosts"));
      if (max_hosts <= 0)
        {
          g_debug ("Error ! max_hosts = %d -- check %s", max_hosts,
                   (char *) prefs_get ("config_file"));
          max_hosts = global_max_hosts;
        }
      else if (max_hosts > global_max_hosts)
        {
          g_debug ("Client tried to raise the maximum hosts number - %d."
                   " Using %d. Change 'max_hosts' in openvas.conf if you"
                   " believe this is incorrect",
                   max_hosts, global_max_hosts);
          max_hosts = global_max_hosts;
        }
    }
  else
    max_hosts = global_max_hosts;
  return (max_hosts);
}

References global_max_hosts.

Referenced by attack_network().

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is_scanner_only_pref()

int is_scanner_only_pref

(

const char *

pref

)

Definition at line 235 of file utils.c.

{
  if (pref == NULL)
    return 0;
  if (!strcmp (pref, "config_file") || !strcmp (pref, "plugins_folder")
      || !strcmp (
        pref,
        "kb_location") // old name of db_address, ignore from old conf's
      || !strcmp (pref, "db_address") || !strcmp (pref, "negot_timeout")
      || !strcmp (pref, "force_pubkey_auth")
      || !strcmp (pref, "log_whole_attack")
      || !strcmp (pref, "log_plugins_name_at_load")
      || !strcmp (pref, "nasl_no_signature_check")
      || !strcmp (pref, "vendor_version") || !strcmp (pref, "drop_privileges")
      || !strcmp (pref, "nasl_drop_privileges_user")
      || !strcmp (pref, "debug_tls") || !strcmp (pref, "min_free_mem")
      || !strcmp (pref, "max_sysload")
      /* Preferences starting with sys_ are scanner-side only. */
      || !strncmp (pref, "sys_", 4))
    return 1;
  return 0;
}

Referenced by overwrite_openvas_prefs_with_prefs_from_client().

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process_alive()

int process_alive

(

pid_t

pid

)

Determines if a process is alive - as reliably as we can

Definition at line 195 of file utils.c.

{
  int i, ret;
  if (pid == 0)
    return 0;
 
  for (i = 0, ret = 1; (i < 10) && (ret > 0); i++)
    ret = waitpid (pid, NULL, WNOHANG);
 
  return kill (pid, 0) == 0;
}

References pid.

Referenced by attack_host(), next_free_process(), and update_running_processes().

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store_file()

int store_file	(	struct scan_globals *	globals,
		const char *	file,
		const char *	file_hash
	)

Stores a file type preference in a hash table.

Parameters

globals	Global struct.
file	File content.
file_hash	hash to reference the file.

Returns

0 if successful, -1 in case of errors.

Definition at line 101 of file utils.c.

{
  char *origname;
  gchar *contents = NULL;
 
  size_t bytes = 0;
 
  if (!file_hash || *file_hash == '\0')
    return -1;
 
  origname = g_strdup (file_hash);
 
  contents = (gchar *) g_base64_decode (file, &bytes);
 
  if (contents == NULL)
    {
      g_debug ("store_file: Failed to allocate memory for uploaded file.");
      g_free (origname);
      return -1;
    }
 
  files_add_translation (globals, origname, contents);
  files_add_size_translation (globals, origname, bytes);
 
  g_free (origname);
  return 0;
}

References files_add_size_translation(), and files_add_translation().

Referenced by overwrite_openvas_prefs_with_prefs_from_client().

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wait_for_children1()

void wait_for_children1

(

void

)

Definition at line 216 of file utils.c.

{
  int e, n = 0;
  do
    {
      errno = 0;
      e = waitpid (-1, NULL, WNOHANG);
      n++;
    }
  while ((e > 0 || errno == EINTR) && n < 20);
}

Variable Documentation

global_max_checks

int global_max_checks

extern

Definition at line 84 of file openvas.c.

Referenced by get_max_checks_number(), and set_globals_from_preferences().

global_max_hosts

int global_max_hosts

extern

Globals that should not be touched (used in utils module).

Definition at line 83 of file openvas.c.

Referenced by get_max_hosts_number(), and set_globals_from_preferences().