Capture, filter, and generate statistics for RADIUS traffic. More...

#include <fcntl.h>
#include <time.h>
#include <math.h>
#include <freeradius-devel/autoconf.h>
#include <freeradius-devel/radius/list.h>
#include <freeradius-devel/util/conf.h>
#include <freeradius-devel/util/event.h>
#include <freeradius-devel/util/file.h>
#include <freeradius-devel/util/syserror.h>
#include <freeradius-devel/util/atexit.h>
#include <freeradius-devel/util/pair_legacy.h>
#include <freeradius-devel/util/base16.h>
#include <freeradius-devel/util/pcap.h>
#include <freeradius-devel/util/timeval.h>
#include "radsniff.h"

Include dependency graph for radsniff.c:

Go to the source code of this file.

Macros
#define	RS_ASSERT(_x) if (!(_x) && !fr_cond_assert(_x)) exit(1)

#define	RS_CLEANUP_NOW(_x, _s)

Functions
static int	_request_free (rs_request_t *request)

static void	_rs_event (UNUSED fr_timer_list_t tl, UNUSED fr_time_t now, void ctx)

static int	_rs_event_status (UNUSED fr_time_t now, fr_time_delta_t wake_t, UNUSED void *uctx)

static void	_unmark_link (void *request)
	Callback for when the request is removed from the link tree.

static void	_unmark_request (void *request)
	Callback for when the request is removed from the request tree.

int	main (int argc, char *argv[])

static int	rs_build_dict_list (fr_dict_attr_t const *out, size_t len, char list)

static int	rs_build_event_flags (int flags, fr_table_num_sorted_t const map, size_t map_len, char *list)

static int	rs_build_filter (fr_pair_list_t out, char const filter)

static int	rs_check_pcap_drop (fr_pcap_t *in)
	Query libpcap to see if it dropped any packets.

static void	rs_daemonize (char const *pidfile)
	Fork and kill the parent process, writing out our PID.

static int	rs_get_pairs (TALLOC_CTX ctx, fr_pair_list_t out, fr_pair_list_t vps, fr_dict_attr_t const da[], int num)
	Copy a subset of attributes from one list into the other.

static void	rs_got_packet (fr_event_list_t el, int fd, UNUSED int flags, void ctx)

static int	rs_install_stats_processor (rs_stats_t stats, fr_event_list_t el, fr_pcap_t in, struct timeval now, bool live)

static void	rs_packet_cleanup (rs_request_t *request)

static int8_t	rs_packet_cmp (void const one, void const two)
	Wrapper around fr_packet_cmp to strip off the outer request struct.

static void	rs_packet_print (rs_request_t request, uint64_t count, rs_status_t status, fr_pcap_t handle, fr_packet_t packet, fr_pair_list_t list, struct timeval elapsed, struct timeval latency, bool response, bool body)

static void	rs_packet_print_csv (uint64_t count, rs_status_t status, fr_pcap_t handle, fr_packet_t packet, fr_pair_list_t list, UNUSED struct timeval elapsed, struct timeval *latency, UNUSED bool response, bool body)

static void	rs_packet_print_csv_header (void)

static void	rs_packet_print_fancy (uint64_t count, rs_status_t status, fr_pcap_t handle, fr_packet_t packet, fr_pair_list_t list, struct timeval elapsed, struct timeval *latency, bool response, bool body)

static void	rs_packet_process (uint64_t count, rs_event_t event, struct pcap_pkthdr const header, uint8_t const *data)

static void	rs_packet_save_in_output_dir (uint64_t count, UNUSED rs_status_t status, UNUSED fr_pcap_t handle, fr_packet_t packet, fr_pair_list_t list, UNUSED struct timeval elapsed, UNUSED struct timeval *latency, bool response, bool body)

static rs_request_t *	rs_request_alloc (TALLOC_CTX *ctx)

static int	rs_request_to_pcap (rs_event_t event, rs_request_t request, struct pcap_pkthdr const header, uint8_t const data)

static int	rs_response_to_pcap (rs_event_t event, rs_request_t request, struct pcap_pkthdr const header, uint8_t const data)

static int8_t	rs_rtx_cmp (void const one, void const two)
	Compare requests using packet info and lists of attributes.

static void	rs_signal_action (UNUSED fr_event_list_t list, int fd, int UNUSED flags, UNUSED void ctx)
	Read the last signal from the signal pipe.

static void	rs_signal_self (int sig)
	Write the last signal to the signal pipe.

static size_t	rs_snprint_csv (char out, size_t outlen, char const in, size_t inlen)

static ssize_t	rs_stats_print_code_csv (char out, size_t outlen, rs_latency_t stats)

static void	rs_stats_print_code_fancy (rs_latency_t *stats, fr_radius_packet_code_t code)

static void	rs_stats_print_csv (rs_update_t this, rs_stats_t stats, UNUSED struct timeval *now)

static void	rs_stats_print_csv_header (rs_update_t *this)

static void	rs_stats_print_fancy (rs_update_t this, rs_stats_t stats, struct timeval *now)

static void	rs_stats_process (fr_timer_list_t tl, fr_time_t now_t, void ctx)
	Process stats for a single interval.

static void	rs_stats_process_counters (rs_latency_t *stats)

static void	rs_stats_process_latency (rs_latency_t *stats)
	Update smoothed average.

static void	rs_stats_update_latency (rs_latency_t stats, struct timeval latency)
	Update latency statistics for request/response and forwarded packets.

static void	rs_time_print (char out, size_t len, struct timeval const t)

static void	rs_tv_add_ms (struct timeval const start, unsigned long interval, struct timeval result)

static void	timeout_event (UNUSED fr_timer_list_t tl, UNUSED fr_time_t now_t, void ctx)
	Exit the event loop after a given timeout.

static NEVER_RETURNS void	usage (int status)

Variables
static fr_dict_attr_t const *	attr_packet_type

static bool	cleanup

static rs_t *	conf

static fr_dict_t const *	dict_freeradius

static fr_dict_t const *	dict_radius

static fr_event_list_t *	events

static fr_rb_tree_t *	link_tree = NULL

static int	packets_count = 1

fr_dict_autoload_t	radsniff_dict []

fr_dict_attr_autoload_t	radsniff_dict_attr []

static char const *	radsniff_version = RADIUSD_VERSION_BUILD("radsniff")

static fr_rb_tree_t *	request_tree = NULL

static fr_table_num_sorted_t const	rs_events []

static size_t	rs_events_len = NUM_ELEMENTS(rs_events)

static int	rs_useful_codes []

static int	self_pipe [2] = {-1, -1}
	Signals from sig handlers.

static struct timeval	start_pcap = {0, 0}

static char	timestr [50]

static const uint8_t	zeros [RADIUS_AUTH_VECTOR_LENGTH] = {}

Detailed Description

Capture, filter, and generate statistics for RADIUS traffic.

Id: d9f74306fb7d86bfa34d98c543b382e621de1004

Copyright: 2013 Arran Cudbard-Bell (a.cud.nosp@m.bard.nosp@m.b@fre.nosp@m.erad.nosp@m.ius.o.nosp@m.rg); 2006 The FreeRADIUS server project; 2006 Nicolas Baradakis (nicol.nosp@m.as.b.nosp@m.arada.nosp@m.kis@.nosp@m.ceget.nosp@m.el.n.nosp@m.et)

Definition in file radsniff.c.

Macro Definition Documentation

◆ RS_ASSERT

#define RS_ASSERT ( _x ) if (!(_x) && !fr_cond_assert(_x)) exit(1)

Definition at line 51 of file radsniff.c.

◆ RS_CLEANUP_NOW

#define RS_CLEANUP_NOW	(	_x,
		_s
	)

Value:

        {\
                _x->silent_cleanup = _s;\
                _x->when = header->ts;\
                rs_packet_cleanup(_x);\
                _x = NULL;\
        } while (0)

Definition at line 1236 of file radsniff.c.

Function Documentation

◆ _request_free()

static int _request_free ( rs_request_t * request )

static

Definition at line 1030 of file radsniff.c.

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◆ _rs_event()

static void _rs_event	(	UNUSED fr_timer_list_t *	tl,
		UNUSED fr_time_t	now,
		void *	ctx
	)

static

Definition at line 1130 of file radsniff.c.

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◆ _rs_event_status()

static int _rs_event_status	(	UNUSED fr_time_t	now,
		fr_time_delta_t	wake_t,
		UNUSED void *	uctx
	)

static

Definition at line 2018 of file radsniff.c.

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◆ _unmark_link()

static void _unmark_link ( void * request )

static

Callback for when the request is removed from the link tree.

Parameters

request being removed.

Definition at line 2165 of file radsniff.c.

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◆ _unmark_request()

static void _unmark_request ( void * request )

static

Callback for when the request is removed from the request tree.

Parameters

request being removed.

Definition at line 2155 of file radsniff.c.

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◆ main()

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 2317 of file radsniff.c.

◆ rs_build_dict_list()

static int rs_build_dict_list	(	fr_dict_attr_t const **	out,
		size_t	len,
		char *	list
	)

static

Definition at line 2060 of file radsniff.c.

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◆ rs_build_event_flags()

static int rs_build_event_flags	(	int *	flags,
		fr_table_num_sorted_t const *	map,
		size_t	map_len,
		char *	list
	)

static

Definition at line 2126 of file radsniff.c.

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◆ rs_build_filter()

static int rs_build_filter	(	fr_pair_list_t *	out,
		char const *	filter
	)

static

Definition at line 2096 of file radsniff.c.

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◆ rs_check_pcap_drop()

static int rs_check_pcap_drop ( fr_pcap_t * in )

static

Query libpcap to see if it dropped any packets.

We need to check to see if libpcap dropped any packets and if it did, we need to stop stats output for long enough for inaccurate statistics to be cleared out.

Parameters

in	pcap handle to check.

Returns

0 No drops.
-1 We couldn't check.
-2 Dropped because of buffer exhaustion.
-3 Dropped because of NIC.

Definition at line 552 of file radsniff.c.

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◆ rs_daemonize()

static void rs_daemonize ( char const * pidfile )

static

Fork and kill the parent process, writing out our PID.

Parameters

pidfile the PID file to write our PID to

Definition at line 117 of file radsniff.c.

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◆ rs_get_pairs()

static int rs_get_pairs	(	TALLOC_CTX *	ctx,
		fr_pair_list_t *	out,
		fr_pair_list_t *	vps,
		fr_dict_attr_t const *	da[],
		int	num
	)

static

Copy a subset of attributes from one list into the other.

Should be O(n) if all the attributes exist. List must be pre-sorted.

Definition at line 996 of file radsniff.c.

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◆ rs_got_packet()

static void rs_got_packet	(	fr_event_list_t *	el,
		int	fd,
		UNUSED int	flags,
		void *	ctx
	)

static

Definition at line 1925 of file radsniff.c.

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◆ rs_install_stats_processor()

static int rs_install_stats_processor	(	rs_stats_t *	stats,
		fr_event_list_t *	el,
		fr_pcap_t *	in,
		struct timeval *	now,
		bool	live
	)

static

Definition at line 940 of file radsniff.c.

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◆ rs_packet_cleanup()

static void rs_packet_cleanup ( rs_request_t * request )

static

Definition at line 1059 of file radsniff.c.

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◆ rs_packet_cmp()

static int8_t rs_packet_cmp	(	void const *	one,
		void const *	two
	)

static

Wrapper around fr_packet_cmp to strip off the outer request struct.

Definition at line 1140 of file radsniff.c.

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◆ rs_packet_print()

static void rs_packet_print	(	rs_request_t *	request,
		uint64_t	count,
		rs_status_t	status,
		fr_pcap_t *	handle,
		fr_packet_t *	packet,
		fr_pair_list_t *	list,
		struct timeval *	elapsed,
		struct timeval *	latency,
		bool	response,
		bool	body
	)

inlinestatic

Definition at line 529 of file radsniff.c.

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◆ rs_packet_print_csv()

static void rs_packet_print_csv	(	uint64_t	count,
		rs_status_t	status,
		fr_pcap_t *	handle,
		fr_packet_t *	packet,
		fr_pair_list_t *	list,
		UNUSED struct timeval *	elapsed,
		struct timeval *	latency,
		UNUSED bool	response,
		bool	body
	)

static

Definition at line 309 of file radsniff.c.

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◆ rs_packet_print_csv_header()

static void rs_packet_print_csv_header ( void )

static

Definition at line 268 of file radsniff.c.

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◆ rs_packet_print_fancy()

static void rs_packet_print_fancy	(	uint64_t	count,
		rs_status_t	status,
		fr_pcap_t *	handle,
		fr_packet_t *	packet,
		fr_pair_list_t *	list,
		struct timeval *	elapsed,
		struct timeval *	latency,
		bool	response,
		bool	body
	)

static

Definition at line 383 of file radsniff.c.

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◆ rs_packet_process()

static void rs_packet_process	(	uint64_t	count,
		rs_event_t *	event,
		struct pcap_pkthdr const *	header,
		uint8_t const *	data
	)

static

Definition at line 1260 of file radsniff.c.

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◆ rs_packet_save_in_output_dir()

static void rs_packet_save_in_output_dir	(	uint64_t	count,
		UNUSED rs_status_t	status,
		UNUSED fr_pcap_t *	handle,
		fr_packet_t *	packet,
		fr_pair_list_t *	list,
		UNUSED struct timeval *	elapsed,
		UNUSED struct timeval *	latency,
		bool	response,
		bool	body
	)

static

Definition at line 478 of file radsniff.c.

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◆ rs_request_alloc()

static rs_request_t * rs_request_alloc ( TALLOC_CTX * ctx )

static

Definition at line 1244 of file radsniff.c.

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◆ rs_request_to_pcap()

static int rs_request_to_pcap	(	rs_event_t *	event,
		rs_request_t *	request,
		struct pcap_pkthdr const *	header,
		uint8_t const *	data
	)

inlinestatic

Definition at line 1198 of file radsniff.c.

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◆ rs_response_to_pcap()

static int rs_response_to_pcap	(	rs_event_t *	event,
		rs_request_t *	request,
		struct pcap_pkthdr const *	header,
		uint8_t const *	data
	)

inlinestatic

Definition at line 1148 of file radsniff.c.

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◆ rs_rtx_cmp()

static int8_t rs_rtx_cmp	(	void const *	one,
		void const *	two
	)

static

Compare requests using packet info and lists of attributes.

Definition at line 2038 of file radsniff.c.

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◆ rs_signal_action()

static void rs_signal_action	(	UNUSED fr_event_list_t *	list,
		int	fd,
		int UNUSED	flags,
		UNUSED void *	ctx
	)

static

Read the last signal from the signal pipe.

Definition at line 2219 of file radsniff.c.

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◆ rs_signal_self()

static void rs_signal_self ( int sig )

static

Write the last signal to the signal pipe.

Parameters

sig raised

Definition at line 2208 of file radsniff.c.

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◆ rs_snprint_csv()

static size_t rs_snprint_csv	(	char *	out,
		size_t	outlen,
		char const *	in,
		size_t	inlen
	)

static

Definition at line 220 of file radsniff.c.

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◆ rs_stats_print_code_csv()

static ssize_t rs_stats_print_code_csv	(	char *	out,
		size_t	outlen,
		rs_latency_t *	stats
	)

static

Definition at line 774 of file radsniff.c.

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◆ rs_stats_print_code_fancy()

static void rs_stats_print_code_fancy	(	rs_latency_t *	stats,
		fr_radius_packet_code_t	code
	)

static

Definition at line 635 of file radsniff.c.

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◆ rs_stats_print_csv()

static void rs_stats_print_csv	(	rs_update_t *	this,
		rs_stats_t *	stats,
		UNUSED struct timeval *	now
	)

static

Definition at line 799 of file radsniff.c.

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◆ rs_stats_print_csv_header()

static void rs_stats_print_csv_header ( rs_update_t * this )

static

Definition at line 726 of file radsniff.c.

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◆ rs_stats_print_fancy()

static void rs_stats_print_fancy	(	rs_update_t *	this,
		rs_stats_t *	stats,
		struct timeval *	now
	)

static

Definition at line 679 of file radsniff.c.

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◆ rs_stats_process()

static void rs_stats_process	(	fr_timer_list_t *	tl,
		fr_time_t	now_t,
		void *	ctx
	)

static

Process stats for a single interval.

Definition at line 844 of file radsniff.c.

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◆ rs_stats_process_counters()

static void rs_stats_process_counters ( rs_latency_t * stats )

static

Definition at line 620 of file radsniff.c.

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◆ rs_stats_process_latency()

static void rs_stats_process_latency ( rs_latency_t * stats )

static

Update smoothed average.

Definition at line 580 of file radsniff.c.

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◆ rs_stats_update_latency()

static void rs_stats_update_latency	(	rs_latency_t *	stats,
		struct timeval *	latency
	)

static

Update latency statistics for request/response and forwarded packets.

Definition at line 923 of file radsniff.c.

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◆ rs_time_print()

static void rs_time_print	(	char *	out,
		size_t	len,
		struct timeval const *	t
	)

static

Definition at line 193 of file radsniff.c.

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◆ rs_tv_add_ms()

static void rs_tv_add_ms	(	struct timeval const *	start,
		unsigned long	interval,
		struct timeval *	result
	)

static

Definition at line 183 of file radsniff.c.

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◆ timeout_event()

static void timeout_event	(	UNUSED fr_timer_list_t *	tl,
		UNUSED fr_time_t	now_t,
		void *	ctx
	)

static

Exit the event loop after a given timeout.

Definition at line 2174 of file radsniff.c.

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◆ usage()

static NEVER_RETURNS void usage ( int status )

static

Definition at line 2262 of file radsniff.c.

Variable Documentation

◆ attr_packet_type

fr_dict_attr_t const* attr_packet_type

static

Definition at line 103 of file radsniff.c.

◆ cleanup

bool cleanup

static

Definition at line 60 of file radsniff.c.

◆ conf

rs_t* conf

static

Definition at line 53 of file radsniff.c.

◆ dict_freeradius

fr_dict_t const* dict_freeradius

static

Definition at line 93 of file radsniff.c.

◆ dict_radius

fr_dict_t const* dict_radius

static

Definition at line 94 of file radsniff.c.

◆ events

fr_event_list_t* events

static

Definition at line 59 of file radsniff.c.

◆ link_tree

fr_rb_tree_t* link_tree = NULL

static

Definition at line 58 of file radsniff.c.

◆ packets_count

int packets_count = 1

static

Definition at line 61 of file radsniff.c.

◆ radsniff_dict

fr_dict_autoload_t radsniff_dict

Initial value:

= {
        { .out = &dict_freeradius, .proto = "freeradius" },
        { .out = &dict_radius, .proto = "radius" },
        { NULL }
}

Definition at line 97 of file radsniff.c.

◆ radsniff_dict_attr

fr_dict_attr_autoload_t radsniff_dict_attr

Initial value:

= {
        { .out = &attr_packet_type, .name = "Packet-Type", .type = FR_TYPE_UINT32, .dict = &dict_radius },
        { NULL }
}

Definition at line 106 of file radsniff.c.

◆ radsniff_version

char const* radsniff_version = RADIUSD_VERSION_BUILD("radsniff")

static

Definition at line 65 of file radsniff.c.

◆ request_tree

fr_rb_tree_t* request_tree = NULL

static

Definition at line 57 of file radsniff.c.

◆ rs_events

fr_table_num_sorted_t const rs_events[]

static

Initial value:

= {
        { L("error"),           RS_ERROR        },
        { L("noreq"),           RS_UNLINKED     },
        { L("norsp"),           RS_LOST         },
        { L("received"),        RS_NORMAL       },
        { L("reused"),          RS_REUSED       },
        { L("rtx"),             RS_RTX          }
}

Definition at line 83 of file radsniff.c.

◆ rs_events_len

size_t rs_events_len = NUM_ELEMENTS(rs_events)

static

Definition at line 91 of file radsniff.c.

◆ rs_useful_codes

int rs_useful_codes[]

static

Initial value:

= {
        FR_RADIUS_CODE_ACCESS_REQUEST,                  
        FR_RADIUS_CODE_ACCESS_ACCEPT,                   
        FR_RADIUS_CODE_ACCESS_REJECT,                   
        FR_RADIUS_CODE_ACCOUNTING_REQUEST,              
        FR_RADIUS_CODE_ACCOUNTING_RESPONSE,             
        FR_RADIUS_CODE_ACCESS_CHALLENGE,                
        FR_RADIUS_CODE_STATUS_SERVER,                   
        FR_RADIUS_CODE_DISCONNECT_REQUEST,              
        FR_RADIUS_CODE_DISCONNECT_ACK,                  
        FR_RADIUS_CODE_DISCONNECT_NAK,                  
        FR_RADIUS_CODE_COA_REQUEST,                     
        FR_RADIUS_CODE_COA_ACK,                         
        FR_RADIUS_CODE_COA_NAK,                         
}

Definition at line 67 of file radsniff.c.

◆ self_pipe

int self_pipe[2] = {-1, -1}

static

Signals from sig handlers.

Definition at line 63 of file radsniff.c.

◆ start_pcap

struct timeval start_pcap = {0, 0}

static

Definition at line 54 of file radsniff.c.

◆ timestr

char timestr[50]

static

Definition at line 55 of file radsniff.c.

◆ zeros

const uint8_t zeros[RADIUS_AUTH_VECTOR_LENGTH] = {}

static

Definition at line 1258 of file radsniff.c.

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ RS_ASSERT

◆ RS_CLEANUP_NOW

Function Documentation

◆ _request_free()

◆ _rs_event()

◆ _rs_event_status()

◆ _unmark_link()

◆ _unmark_request()

◆ main()

◆ rs_build_dict_list()

◆ rs_build_event_flags()

◆ rs_build_filter()

◆ rs_check_pcap_drop()

◆ rs_daemonize()

◆ rs_get_pairs()

◆ rs_got_packet()

◆ rs_install_stats_processor()

◆ rs_packet_cleanup()

◆ rs_packet_cmp()

◆ rs_packet_print()

◆ rs_packet_print_csv()

◆ rs_packet_print_csv_header()

◆ rs_packet_print_fancy()

◆ rs_packet_process()

◆ rs_packet_save_in_output_dir()

◆ rs_request_alloc()

◆ rs_request_to_pcap()

◆ rs_response_to_pcap()

◆ rs_rtx_cmp()

◆ rs_signal_action()

◆ rs_signal_self()

◆ rs_snprint_csv()

◆ rs_stats_print_code_csv()

◆ rs_stats_print_code_fancy()

◆ rs_stats_print_csv()

◆ rs_stats_print_csv_header()

◆ rs_stats_print_fancy()

◆ rs_stats_process()

◆ rs_stats_process_counters()

◆ rs_stats_process_latency()

◆ rs_stats_update_latency()

◆ rs_time_print()

◆ rs_tv_add_ms()

◆ timeout_event()

◆ usage()

Variable Documentation

◆ attr_packet_type

◆ cleanup

◆ conf

◆ dict_freeradius

◆ dict_radius

◆ events

◆ link_tree

◆ packets_count

◆ radsniff_dict

◆ radsniff_dict_attr

◆ radsniff_version

◆ request_tree

◆ rs_events

◆ rs_events_len

◆ rs_useful_codes

◆ self_pipe

◆ start_pcap

◆ timestr

◆ zeros