GNUnet  0.11.x
Typedefs | Functions
gnunet-daemon-hostlist_client.h File Reference

hostlist support. More...

#include "gnunet_core_service.h"
#include "gnunet_statistics_service.h"
#include "gnunet_util_lib.h"
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Typedefs

typedef void(* GNUNET_HOSTLIST_UriHandler) (const char *uri)
 Function that handles an advertised URI. More...
 

Functions

int GNUNET_HOSTLIST_client_start (const struct GNUNET_CONFIGURATION_Handle *c, struct GNUNET_STATISTICS_Handle *st, GNUNET_CORE_ConnectEventHandler *ch, GNUNET_CORE_DisconnectEventHandler *dh, GNUNET_HOSTLIST_UriHandler *msgh, int learn)
 Start downloading hostlists from hostlist servers as necessary. More...
 
void GNUNET_HOSTLIST_client_stop (void)
 Stop downloading hostlists from hostlist servers as necessary. More...
 

Detailed Description

hostlist support.

Downloads HELLOs via HTTP.

Author
Christian Grothoff

Definition in file gnunet-daemon-hostlist_client.h.

Typedef Documentation

◆ GNUNET_HOSTLIST_UriHandler

typedef void(* GNUNET_HOSTLIST_UriHandler) (const char *uri)

Function that handles an advertised URI.

Parameters
uri0-termianted URI of a hostlist

Definition at line 39 of file gnunet-daemon-hostlist_client.h.

Function Documentation

◆ GNUNET_HOSTLIST_client_start()

int GNUNET_HOSTLIST_client_start ( const struct GNUNET_CONFIGURATION_Handle c,
struct GNUNET_STATISTICS_Handle st,
GNUNET_CORE_ConnectEventHandler ch,
GNUNET_CORE_DisconnectEventHandler dh,
GNUNET_HOSTLIST_UriHandler msgh,
int  learn 
)

Start downloading hostlists from hostlist servers as necessary.

Parameters
cconfiguration to use
ststatistics handle to use
[out]chset to handler for CORE connect events
[out]dhset to handler for CORE disconnect events
[out]msghset to handler for CORE advertisement messages
learnshould we learn hostlist URLs from CORE
Returns
GNUNET_OK on success

Definition at line 1582 of file gnunet-daemon-hostlist_client.c.

References _, filename, gettext_noop, GNUNET_assert, GNUNET_break, GNUNET_CONFIGURATION_get_value_filename(), GNUNET_CONFIGURATION_get_value_string(), GNUNET_DISK_file_test(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_ERROR_TYPE_INFO, GNUNET_free, GNUNET_log, GNUNET_log_strerror_file, GNUNET_NO, GNUNET_OK, GNUNET_PEERINFO_connect(), GNUNET_SCHEDULER_add_delayed(), GNUNET_SCHEDULER_add_now(), GNUNET_STATISTICS_get(), GNUNET_STRINGS_relative_time_to_string(), GNUNET_STRINGS_utf8_toupper(), GNUNET_SYSERR, GNUNET_TIME_UNIT_MINUTES, GNUNET_YES, handler_advertisement(), handler_connect(), handler_disconnect(), load_hostlist_file(), primary_task(), process_stat(), proxy, proxy_password, proxy_type, proxy_username, result, SAVING_INTERVAL, st, stat_learning, stat_testing_allowed, stat_testing_hostlist, stat_timeout_task(), stat_use_bootstrap, task_check(), and task_hostlist_saving().

Referenced by run().

1588 {
1589  char *filename;
1590  char *proxytype_str;
1591  int result;
1592 
1593  GNUNET_assert (NULL != st);
1594  if (0 != curl_global_init (CURL_GLOBAL_WIN32))
1595  {
1596  GNUNET_break (0);
1597  return GNUNET_SYSERR;
1598  }
1599  cfg = c;
1600  stats = st;
1601 
1602  /* Read proxy configuration */
1604  if (GNUNET_OK ==
1605  GNUNET_CONFIGURATION_get_value_string (cfg, "HOSTLIST", "PROXY", &proxy))
1606  {
1607  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found proxy host: `%s'\n", proxy);
1608  /* proxy username */
1610  "HOSTLIST",
1611  "PROXY_USERNAME",
1612  &proxy_username))
1613  {
1615  "Found proxy username name: `%s'\n",
1616  proxy_username);
1617  }
1618 
1619  /* proxy password */
1621  "HOSTLIST",
1622  "PROXY_PASSWORD",
1623  &proxy_password))
1624  {
1626  "Found proxy password name: `%s'\n",
1627  proxy_password);
1628  }
1629 
1630  /* proxy type */
1632  "HOSTLIST",
1633  "PROXY_TYPE",
1634  &proxytype_str))
1635  {
1636  GNUNET_STRINGS_utf8_toupper (proxytype_str, proxytype_str);
1637  proxy_type = CURLPROXY_HTTP;
1638  if (0 == strcmp (proxytype_str, "HTTP"))
1639  proxy_type = CURLPROXY_HTTP;
1640  else if (0 == strcmp (proxytype_str, "HTTP_1_0"))
1641  proxy_type = CURLPROXY_HTTP_1_0;
1642  else if (0 == strcmp (proxytype_str, "SOCKS4"))
1643  proxy_type = CURLPROXY_SOCKS4;
1644  else if (0 == strcmp (proxytype_str, "SOCKS5"))
1645  proxy_type = CURLPROXY_SOCKS5;
1646  else if (0 == strcmp (proxytype_str, "SOCKS4A"))
1647  proxy_type = CURLPROXY_SOCKS4A;
1648  else if (0 == strcmp (proxytype_str, "SOCKS5_HOSTNAME"))
1649  proxy_type = CURLPROXY_SOCKS5_HOSTNAME;
1650  else
1651  {
1652  GNUNET_log (
1654  _ (
1655  "Invalid proxy type: `%s', disabling proxy! Check configuration!\n"),
1656  proxytype_str);
1657  GNUNET_free (proxytype_str);
1658  GNUNET_free (proxy);
1659  proxy = NULL;
1661  proxy_username = NULL;
1663  proxy_password = NULL;
1664 
1665  return GNUNET_SYSERR;
1666  }
1667  }
1668  GNUNET_free (proxytype_str);
1669  }
1670 
1671  stat_learning = learn;
1672  *ch = &handler_connect;
1673  *dh = &handler_disconnect;
1674  linked_list_head = NULL;
1675  linked_list_tail = NULL;
1679 
1680  if (GNUNET_YES == stat_learning)
1681  {
1682  *msgh = &handler_advertisement;
1684  _ ("Learning is enabled on this peer\n"));
1685  load_hostlist_file ();
1687  "Hostlists will be saved to file again in %s\n",
1689  GNUNET_YES));
1692  NULL);
1693  }
1694  else
1695  {
1697  _ ("Learning is not enabled on this peer\n"));
1698  *msgh = NULL;
1700  "HOSTLIST",
1701  "HOSTLISTFILE",
1702  &filename))
1703  {
1704  if (GNUNET_YES == GNUNET_DISK_file_test (filename))
1705  {
1706  result = remove (filename);
1707  if (0 == result)
1708  GNUNET_log (
1710  _ (
1711  "Since learning is not enabled on this peer, hostlist file `%s' was removed\n"),
1712  filename);
1713  else
1715  "remove",
1716  filename);
1717  }
1718  }
1719  GNUNET_free (filename);
1720  }
1722  "Loading stats value on hostlist download frequency\n");
1724  "hostlist",
1725  gettext_noop (
1726  "# milliseconds between hostlist downloads"),
1727  &primary_task,
1728  &process_stat,
1729  NULL);
1730  if (NULL == sget)
1731  {
1733  "Statistics request failed, scheduling hostlist download\n");
1735  }
1736  else
1737  {
1740  NULL);
1741  }
1742  return GNUNET_OK;
1743 }
int GNUNET_DISK_file_test(const char *fil)
Check that fil corresponds to a filename (of a file that exists and that is not a directory)...
Definition: disk.c:544
static struct GNUNET_CADET_Channel * ch
Channel handle.
Definition: gnunet-cadet.c:117
struct GNUNET_PEERINFO_Handle * GNUNET_PEERINFO_connect(const struct GNUNET_CONFIGURATION_Handle *cfg)
Connect to the peerinfo service.
Definition: peerinfo_api.c:130
static int stat_learning
Set if we are allowed to learn new hostlists and use them.
#define GNUNET_TIME_UNIT_MINUTES
One minute.
static struct GNUNET_SCHEDULER_Task * ti_saving_task
ID of the task saving the hostlsit in a regular intervall.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
static void load_hostlist_file()
Method to load persistent hostlist file during hostlist client startup.
static void handler_advertisement(const char *uri)
Method called whenever an advertisement message arrives.
static curl_proxytype proxy_type
Proxy type we are using (can be NULL).
static int process_stat(void *cls, const char *subsystem, const char *name, uint64_t value, int is_persistent)
We've received the previous delay value from statistics.
static void * handler_connect(void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MQ_Handle *mq)
Method called whenever a given peer connects.
static void primary_task(void *cls, int success)
Continuation called by the statistics code once we go the stat.
static char * proxy_username
Proxy username we are using (can be NULL).
static struct GNUNET_PEERINFO_Handle * pi
Handle to peerinfo service.
static char * proxy
Proxy hostname or ip we are using (can be NULL).
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
static char * proxy_password
Proxy password we are using (can be NULL).
#define _(String)
GNU gettext support macro.
Definition: platform.h:184
static void stat_timeout_task(void *cls)
Continuation called by the statistics code once we go the stat.
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed(struct GNUNET_TIME_Relative delay, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1269
void GNUNET_STRINGS_utf8_toupper(const char *input, char *output)
Convert the utf-8 input string to upper case.
Definition: strings.c:592
#define GNUNET_log_strerror_file(level, cmd, filename)
Log an error message at log-level 'level' that indicates a failure of the command 'cmd' with the mess...
static int stat_testing_allowed
Value controlling if a hostlist testing is allowed at the moment.
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_now(GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run as soon as possible.
Definition: scheduler.c:1296
const char * GNUNET_STRINGS_relative_time_to_string(struct GNUNET_TIME_Relative delta, int do_round)
Give relative time in human-readable fancy format.
Definition: strings.c:701
static char * filename
static int result
Global testing status.
static unsigned int stat_use_bootstrap
Value saying if a preconfigured bootstrap server is used.
static struct Hostlist * linked_list_head
Head of the linked list used to store hostlists.
static struct Hostlist * linked_list_tail
Tail of the linked list used to store hostlists.
static void handler_disconnect(void *cls, const struct GNUNET_PeerIdentity *peer, void *internal_cls)
Method called whenever a given peer disconnects.
static void task_check(void *cls)
Task that checks if we should try to download a hostlist.
int GNUNET_CONFIGURATION_get_value_string(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be a string.
static const struct GNUNET_CONFIGURATION_Handle * cfg
Our configuration.
static struct GNUNET_STATISTICS_GetHandle * sget
Handle for our statistics GET operation.
struct GNUNET_STATISTICS_GetHandle * GNUNET_STATISTICS_get(struct GNUNET_STATISTICS_Handle *handle, const char *subsystem, const char *name, GNUNET_STATISTICS_Callback cont, GNUNET_STATISTICS_Iterator proc, void *cls)
Get statistic from the peer.
static struct GNUNET_SCHEDULER_Task * ti_check_download
ID of the task, checking if hostlist download should take plate.
#define GNUNET_log(kind,...)
#define SAVING_INTERVAL
Time interval hostlists are saved to disk.
int GNUNET_CONFIGURATION_get_value_filename(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be the name of a file or directory.
static void task_hostlist_saving(void *cls)
Task that writes hostlist entries to a file on a regular base.
static struct GNUNET_SCHEDULER_Task * st
The shutdown task.
static struct GNUNET_STATISTICS_Handle * stats
Statistics handle.
static int stat_testing_hostlist
Value controlling if a hostlist is tested at the moment.
#define GNUNET_free(ptr)
Wrapper around free.
#define gettext_noop(String)
Definition: gettext.h:69
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◆ GNUNET_HOSTLIST_client_stop()

void GNUNET_HOSTLIST_client_stop ( void  )

Stop downloading hostlists from hostlist servers as necessary.

Definition at line 1750 of file gnunet-daemon-hostlist_client.c.

References clean_up(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_log, GNUNET_PEERINFO_disconnect(), GNUNET_SCHEDULER_cancel(), GNUNET_STATISTICS_get_cancel(), GNUNET_YES, proxy, proxy_password, proxy_username, save_hostlist_file(), stat_learning, and update_hostlist().

Referenced by cleaning_task().

1751 {
1752  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Hostlist client shutdown\n");
1753  if (NULL != sget)
1754  {
1756  sget = NULL;
1757  }
1758  stats = NULL;
1759  if (GNUNET_YES == stat_learning)
1761  if (NULL != ti_saving_task)
1762  {
1764  ti_saving_task = NULL;
1765  }
1766  if (NULL != ti_download_dispatcher_task)
1767  {
1770  }
1771  if (NULL != ti_testing_intervall_task)
1772  {
1775  }
1776  if (NULL != ti_download)
1777  {
1779  ti_download = NULL;
1780  update_hostlist ();
1781  clean_up ();
1782  }
1783  if (NULL != ti_check_download)
1784  {
1786  ti_check_download = NULL;
1787  curl_global_cleanup ();
1788  }
1789  GNUNET_free (proxy);
1790  proxy = NULL;
1792  proxy_username = NULL;
1794  proxy_password = NULL;
1795  if (NULL != pi)
1796  {
1798  pi = NULL;
1799  }
1800  cfg = NULL;
1801 }
static int stat_learning
Set if we are allowed to learn new hostlists and use them.
static struct GNUNET_SCHEDULER_Task * ti_download_dispatcher_task
ID of the task called to initiate a download.
static struct GNUNET_SCHEDULER_Task * ti_saving_task
ID of the task saving the hostlsit in a regular intervall.
void GNUNET_STATISTICS_get_cancel(struct GNUNET_STATISTICS_GetHandle *gh)
Cancel a GNUNET_STATISTICS_get request.
static struct GNUNET_SCHEDULER_Task * ti_download
ID of the task downloading the hostlist.
static void update_hostlist()
Method updating hostlist statistics.
static char * proxy_username
Proxy username we are using (can be NULL).
static struct GNUNET_PEERINFO_Handle * pi
Handle to peerinfo service.
static char * proxy
Proxy hostname or ip we are using (can be NULL).
static char * proxy_password
Proxy password we are using (can be NULL).
static struct GNUNET_SCHEDULER_Task * ti_testing_intervall_task
ID of the task controlling the locking between two hostlist tests.
static const struct GNUNET_CONFIGURATION_Handle * cfg
Our configuration.
static void save_hostlist_file(int shutdown)
Method to save hostlist to a file during hostlist client shutdown.
static void clean_up()
Clean up the state from the task that downloaded the hostlist and schedule the next task...
static struct GNUNET_STATISTICS_GetHandle * sget
Handle for our statistics GET operation.
static struct GNUNET_SCHEDULER_Task * ti_check_download
ID of the task, checking if hostlist download should take plate.
#define GNUNET_log(kind,...)
void GNUNET_PEERINFO_disconnect(struct GNUNET_PEERINFO_Handle *h)
Disconnect from the peerinfo service.
Definition: peerinfo_api.c:156
static struct GNUNET_STATISTICS_Handle * stats
Statistics handle.
#define GNUNET_free(ptr)
Wrapper around free.
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:972
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