control_getinfo.c File Reference

Implementation for miscellaneous controller getinfo commands. More...

#include "core/or/or.h"
#include "app/config/config.h"
#include "core/mainloop/connection.h"
#include "core/mainloop/mainloop.h"
#include "core/or/circuitlist.h"
#include "core/or/connection_edge.h"
#include "core/or/connection_or.h"
#include "core/or/policies.h"
#include "core/or/versions.h"
#include "feature/client/addressmap.h"
#include "feature/client/bridges.h"
#include "feature/client/entrynodes.h"
#include "feature/control/control.h"
#include "feature/control/control_cmd.h"
#include "feature/control/control_events.h"
#include "feature/control/control_fmt.h"
#include "feature/control/control_getinfo.h"
#include "feature/control/control_proto.h"
#include "feature/control/getinfo_geoip.h"
#include "feature/dircache/dirserv.h"
#include "feature/dirclient/dirclient.h"
#include "feature/dirclient/dlstatus.h"
#include "feature/dircommon/directory.h"
#include "feature/hibernate/hibernate.h"
#include "feature/hs/hs_cache.h"
#include "feature/hs_common/shared_random_client.h"
#include "feature/nodelist/authcert.h"
#include "feature/nodelist/microdesc.h"
#include "feature/nodelist/networkstatus.h"
#include "feature/nodelist/nodelist.h"
#include "feature/nodelist/routerinfo.h"
#include "feature/nodelist/routerlist.h"
#include "feature/relay/relay_find_addr.h"
#include "feature/relay/router.h"
#include "feature/relay/routermode.h"
#include "feature/relay/selftest.h"
#include "feature/stats/geoip_stats.h"
#include "feature/stats/predict_ports.h"
#include "feature/stats/rephist.h"
#include "lib/version/torversion.h"
#include "lib/encoding/kvline.h"
#include "core/or/entry_connection_st.h"
#include "core/or/or_connection_st.h"
#include "core/or/origin_circuit_st.h"
#include "core/or/socks_request_st.h"
#include "feature/control/control_connection_st.h"
#include "feature/control/control_cmd_args_st.h"
#include "feature/dircache/cached_dir_st.h"
#include "feature/nodelist/extrainfo_st.h"
#include "feature/nodelist/microdesc_st.h"
#include "feature/nodelist/networkstatus_st.h"
#include "feature/nodelist/node_st.h"
#include "feature/nodelist/routerinfo_st.h"
#include "feature/nodelist/routerlist_st.h"
#include <pwd.h>

Go to the source code of this file.

Data Structures
struct	getinfo_item_t

Macros
#define	CONTROL_EVENTS_PRIVATE
#define	CONTROL_MODULE_PRIVATE
#define	CONTROL_GETINFO_PRIVATE
#define	ITEM(name, fn, desc)   { name, getinfo_helper_##fn, desc, 0 }
#define	PREFIX(name, fn, desc)   { name, getinfo_helper_##fn, desc, 1 }
#define	DOC(name, desc)   { name, NULL, desc, 0 }

Typedefs
typedef int(*	getinfo_helper_t) (control_connection_t *, const char *q, char **a, const char **error_out)

Functions
static char *	list_getinfo_options (void)
static char *	download_status_to_string (const download_status_t *dl)
static int	getinfo_helper_misc (control_connection_t *conn, const char *question, char **answer, const char **errmsg)
static char *	munge_extrainfo_into_routerinfo (const char *ri_body, const signed_descriptor_t *ri, const signed_descriptor_t *ei)
static int	getinfo_helper_listeners (control_connection_t *control_conn, const char *question, char **answer, const char **errmsg)
STATIC int	getinfo_helper_current_time (control_connection_t *control_conn, const char *question, char **answer, const char **errmsg)
STATIC int	getinfo_helper_current_consensus (consensus_flavor_t flavor, char **answer, const char **errmsg)
static int	controller_get_routerdescs (smartlist_t *descs_out, const char *key, const char **msg)
STATIC int	getinfo_helper_dir (control_connection_t *control_conn, const char *question, char **answer, const char **errmsg)
static char *	digest_list_to_string (const smartlist_t *sl)
STATIC void	getinfo_helper_downloads_networkstatus (const char *flavor, download_status_t **dl_to_emit, const char **errmsg)
STATIC void	getinfo_helper_downloads_cert (const char *fp_sk_req, download_status_t **dl_to_emit, smartlist_t **digest_list, const char **errmsg)
STATIC void	getinfo_helper_downloads_desc (const char *desc_req, download_status_t **dl_to_emit, smartlist_t **digest_list, const char **errmsg)
STATIC void	getinfo_helper_downloads_bridge (const char *bridge_req, download_status_t **dl_to_emit, smartlist_t **digest_list, const char **errmsg)
STATIC int	getinfo_helper_downloads (control_connection_t *control_conn, const char *question, char **answer, const char **errmsg)
static int	getinfo_helper_events (control_connection_t *control_conn, const char *question, char **answer, const char **errmsg)
STATIC int	getinfo_helper_onions (control_connection_t *control_conn, const char *question, char **answer, const char **errmsg)
static int	getinfo_helper_liveness (control_connection_t *control_conn, const char *question, char **answer, const char **errmsg)
STATIC int	getinfo_helper_rephist (control_connection_t *control_conn, const char *question, char **answer, const char **errmsg)
static int	getinfo_helper_sr (control_connection_t *control_conn, const char *question, char **answer, const char **errmsg)
static int	handle_getinfo_helper (control_connection_t *control_conn, const char *question, char **answer, const char **err_out)
int	handle_control_getinfo (control_connection_t *conn, const control_cmd_args_t *args)

Variables
static const getinfo_item_t	getinfo_items []
const control_cmd_syntax_t	getinfo_syntax

Detailed Description

Implementation for miscellaneous controller getinfo commands.

Definition in file control_getinfo.c.

Typedef Documentation

getinfo_helper_t

typedef int(* getinfo_helper_t) (control_connection_t *, const char *q, char **a, const char **error_out)

Callback function for GETINFO: on a given control connection, try to answer the question q and store the newly-allocated answer in *a. If an internal error occurs, return -1 and optionally set *error_out to point to an error message to be delivered to the controller. On success, or if the key is not recognized, return 0. Do not set a if the key is not recognized but you may set error_out to improve the error message.

Definition at line 1481 of file control_getinfo.c.

Function Documentation

controller_get_routerdescs()

static int controller_get_routerdescs ( smartlist_t *  descs_out, const char *  key, const char **  msg  )

static

Helper for getinfo_helper_dir.

Add a signed_descriptor_t to descs_out for each router matching key. The key should be either

• "/tor/server/authority" for our own routerinfo;
• "/tor/server/all" for all the routerinfos we have, concatenated;
• "/tor/server/fp/FP" where FP is a plus-separated sequence of hex identity digests; or
• "/tor/server/d/D" where D is a plus-separated sequence of server descriptor digests, in hex.

Return 0 if we found some matching descriptors, or -1 if we do not have any descriptors, no matching descriptors, or if we did not recognize the key (URL). If -1 is returned *msg will be set to an appropriate error message.

Definition at line 396 of file control_getinfo.c.

digest_list_to_string()

static char* digest_list_to_string ( const smartlist_t *  sl )

static

Given a smartlist of 20-byte digests, return a newly allocated string containing each of those digests in order, formatted in HEX, and terminated with a newline.

Definition at line 732 of file control_getinfo.c.

Referenced by getinfo_helper_downloads().

download_status_to_string()

static char * download_status_to_string ( const download_status_t *  dl )

static

Turn a download_status_t into a human-readable description in a newly allocated string. The format is specified in control-spec.txt, under the documentation for "GETINFO download/..." .

Definition at line 756 of file control_getinfo.c.

Referenced by getinfo_helper_downloads().

getinfo_helper_current_consensus()

STATIC int getinfo_helper_current_consensus	(	consensus_flavor_t	flavor,
		char **	answer,
		const char **	errmsg
	)

GETINFO helper for dumping different consensus flavors returns: 0 on success -1 on error.

Check from the cache

Definition at line 346 of file control_getinfo.c.

getinfo_helper_current_time()

STATIC int getinfo_helper_current_time	(	control_connection_t *	control_conn,
		const char *	question,
		char **	answer,
		const char **	errmsg
	)

Implementation helper for GETINFO: answers requests for information about the current time in both local and UTC forms.

Definition at line 321 of file control_getinfo.c.

getinfo_helper_dir()

STATIC int getinfo_helper_dir	(	control_connection_t *	control_conn,
		const char *	question,
		char **	answer,
		const char **	errmsg
	)

Implementation helper for GETINFO: knows the answers for questions about directory information.

Definition at line 461 of file control_getinfo.c.

getinfo_helper_downloads()

STATIC int getinfo_helper_downloads	(	control_connection_t *	control_conn,
		const char *	question,
		char **	answer,
		const char **	errmsg
	)

Implementation helper for GETINFO: knows the answers for questions about download status information.

Definition at line 1053 of file control_getinfo.c.

getinfo_helper_downloads_bridge()

STATIC void getinfo_helper_downloads_bridge	(	const char *	bridge_req,
		download_status_t **	dl_to_emit,
		smartlist_t **	digest_list,
		const char **	errmsg
	)

Handle the bridge download cases for getinfo_helper_downloads()

Definition at line 1010 of file control_getinfo.c.

Referenced by getinfo_helper_downloads().

getinfo_helper_downloads_cert()

STATIC void getinfo_helper_downloads_cert	(	const char *	fp_sk_req,
		download_status_t **	dl_to_emit,
		smartlist_t **	digest_list,
		const char **	errmsg
	)

Handle the cert download cases for getinfo_helper_downloads()

Definition at line 864 of file control_getinfo.c.

Referenced by getinfo_helper_downloads().

getinfo_helper_downloads_desc()

STATIC void getinfo_helper_downloads_desc	(	const char *	desc_req,
		download_status_t **	dl_to_emit,
		smartlist_t **	digest_list,
		const char **	errmsg
	)

Handle the routerdesc download cases for getinfo_helper_downloads()

Definition at line 964 of file control_getinfo.c.

Referenced by getinfo_helper_downloads().

getinfo_helper_downloads_networkstatus()

STATIC void getinfo_helper_downloads_networkstatus	(	const char *	flavor,
		download_status_t **	dl_to_emit,
		const char **	errmsg
	)

Handle the consensus download cases for getinfo_helper_downloads()

Definition at line 835 of file control_getinfo.c.

Referenced by getinfo_helper_downloads().

getinfo_helper_events()

static int getinfo_helper_events ( control_connection_t *  control_conn, const char *  question, char **  answer, const char **  errmsg  )

static

Implementation helper for GETINFO: knows how to generate summaries of the current states of things we send events about.

Definition at line 1115 of file control_getinfo.c.

getinfo_helper_listeners()

static int getinfo_helper_listeners ( control_connection_t *  control_conn, const char *  question, char **  answer, const char **  errmsg  )

static

Implementation helper for GETINFO: answers requests for information about which ports are bound.

Definition at line 260 of file control_getinfo.c.

getinfo_helper_liveness()

static int getinfo_helper_liveness ( control_connection_t *  control_conn, const char *  question, char **  answer, const char **  errmsg  )

static

Implementation helper for GETINFO: answers queries about network liveness.

Definition at line 1403 of file control_getinfo.c.

getinfo_helper_misc()

static int getinfo_helper_misc ( control_connection_t *  conn, const char *  question, char **  answer, const char **  errmsg  )

static

Implementation helper for GETINFO: knows the answers for various trivial-to-implement questions.

Definition at line 84 of file control_getinfo.c.

getinfo_helper_onions()

STATIC int getinfo_helper_onions	(	control_connection_t *	control_conn,
		const char *	question,
		char **	answer,
		const char **	errmsg
	)

Implementation helper for GETINFO: knows how to enumerate hidden services created via the control port.

Definition at line 1373 of file control_getinfo.c.

getinfo_helper_rephist()

STATIC int getinfo_helper_rephist	(	control_connection_t *	control_conn,
		const char *	question,
		char **	answer,
		const char **	errmsg
	)

Implementation helper for GETINFO: answers queries about circuit onion handshake rephist values

Definition at line 1423 of file control_getinfo.c.

getinfo_helper_sr()

static int getinfo_helper_sr ( control_connection_t *  control_conn, const char *  question, char **  answer, const char **  errmsg  )

static

Implementation helper for GETINFO: answers queries about shared random value.

Definition at line 1456 of file control_getinfo.c.

handle_control_getinfo()

int handle_control_getinfo	(	control_connection_t *	conn,
		const control_cmd_args_t *	args
	)

Called when we receive a GETINFO command. Try to fetch all requested information, and reply with information or error message.

Definition at line 1753 of file control_getinfo.c.

handle_getinfo_helper()

static int handle_getinfo_helper ( control_connection_t *  control_conn, const char *  question, char **  answer, const char **  err_out  )

static

Lookup the 'getinfo' entry question, and return the answer in *answer (or NULL if key not recognized). Return 0 if success or unrecognized, or -1 if recognized but internal error.

Definition at line 1724 of file control_getinfo.c.

Referenced by handle_control_getinfo().

list_getinfo_options()

static char * list_getinfo_options ( void  )

static

Allocate and return a list of recognized GETINFO options.

Definition at line 1696 of file control_getinfo.c.

munge_extrainfo_into_routerinfo()

static char* munge_extrainfo_into_routerinfo ( const char *  ri_body, const signed_descriptor_t *  ri, const signed_descriptor_t *  ei  )

static

Awful hack: return a newly allocated string based on a routerinfo and (possibly) an extrainfo, sticking the read-history and write-history from ei into the resulting string. The thing you get back won't necessarily have a valid signature.

New code should never use this; it's for backward compatibility.

NOTE: ri_body is as returned by signed_descriptor_get_body: it might not be NUL-terminated.

Definition at line 216 of file control_getinfo.c.

Variable Documentation

getinfo_items

const getinfo_item_t getinfo_items[]

static

Table mapping questions accepted by GETINFO to the functions that know how to answer them.

Definition at line 1500 of file control_getinfo.c.

Referenced by handle_getinfo_helper(), and list_getinfo_options().

getinfo_syntax

const control_cmd_syntax_t getinfo_syntax

Initial value:

= {
  .max_args = UINT_MAX,
}

Definition at line 1746 of file control_getinfo.c.