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1 /*
2  * wpa_supplicant/hostapd / Debug prints
3  * Copyright (c) 2002-2013, Jouni Malinen <j@w1.fi>
4  *
5  * This software may be distributed under the terms of the BSD license.
6  * See README for more details.
7  */
8 
9 #ifndef WPA_DEBUG_H
10 #define WPA_DEBUG_H
11 
12 #include "wpabuf.h"
13 
14 extern int wpa_debug_level;
15 extern int wpa_debug_show_keys;
16 extern int wpa_debug_timestamp;
17 #ifdef CONFIG_DEBUG_SYSLOG
18 extern int wpa_debug_syslog;
19 #endif /* CONFIG_DEBUG_SYSLOG */
20 
21 /* Debugging function - conditional printf and hex dump. Driver wrappers can
22  * use these for debugging purposes. */
23 
24 enum {
25 	MSG_EXCESSIVE, MSG_MSGDUMP, MSG_DEBUG, MSG_INFO, MSG_WARNING, MSG_ERROR
26 };
27 
28 #ifdef CONFIG_NO_STDOUT_DEBUG
29 
30 #define wpa_debug_print_timestamp() do { } while (0)
31 #define wpa_printf(args...) do { } while (0)
32 #define wpa_hexdump(l,t,b,le) do { } while (0)
33 #define wpa_hexdump_buf(l,t,b) do { } while (0)
34 #define wpa_hexdump_key(l,t,b,le) do { } while (0)
35 #define wpa_hexdump_buf_key(l,t,b) do { } while (0)
36 #define wpa_hexdump_ascii(l,t,b,le) do { } while (0)
37 #define wpa_hexdump_ascii_key(l,t,b,le) do { } while (0)
38 #define wpa_debug_open_file(p) do { } while (0)
39 #define wpa_debug_close_file() do { } while (0)
40 #define wpa_debug_setup_stdout() do { } while (0)
41 #define wpa_dbg(args...) do { } while (0)
42 
wpa_debug_reopen_file(void)43 static inline int wpa_debug_reopen_file(void)
44 {
45 	return 0;
46 }
47 
48 #else /* CONFIG_NO_STDOUT_DEBUG */
49 
50 int wpa_debug_open_file(const char *path);
51 int wpa_debug_reopen_file(void);
52 void wpa_debug_close_file(void);
53 void wpa_debug_setup_stdout(void);
54 
55 /**
56  * wpa_debug_printf_timestamp - Print timestamp for debug output
57  *
58  * This function prints a timestamp in seconds_from_1970.microsoconds
59  * format if debug output has been configured to include timestamps in debug
60  * messages.
61  */
62 void wpa_debug_print_timestamp(void);
63 
64 /**
65  * wpa_printf - conditional printf
66  * @level: priority level (MSG_*) of the message
67  * @fmt: printf format string, followed by optional arguments
68  *
69  * This function is used to print conditional debugging and error messages. The
70  * output may be directed to stdout, stderr, and/or syslog based on
71  * configuration.
72  *
73  * Note: New line '\n' is added to the end of the text when printing to stdout.
74  */
75 void wpa_printf(int level, const char *fmt, ...)
76 PRINTF_FORMAT(2, 3);
77 
78 /**
79  * wpa_hexdump - conditional hex dump
80  * @level: priority level (MSG_*) of the message
81  * @title: title of for the message
82  * @buf: data buffer to be dumped
83  * @len: length of the buf
84  *
85  * This function is used to print conditional debugging and error messages. The
86  * output may be directed to stdout, stderr, and/or syslog based on
87  * configuration. The contents of buf is printed out has hex dump.
88  */
89 void wpa_hexdump(int level, const char *title, const void *buf, size_t len);
90 
wpa_hexdump_buf(int level,const char * title,const struct wpabuf * buf)91 static inline void wpa_hexdump_buf(int level, const char *title,
92 				   const struct wpabuf *buf)
93 {
94 	wpa_hexdump(level, title, buf ? wpabuf_head(buf) : NULL,
95 		    buf ? wpabuf_len(buf) : 0);
96 }
97 
98 /**
99  * wpa_hexdump_key - conditional hex dump, hide keys
100  * @level: priority level (MSG_*) of the message
101  * @title: title of for the message
102  * @buf: data buffer to be dumped
103  * @len: length of the buf
104  *
105  * This function is used to print conditional debugging and error messages. The
106  * output may be directed to stdout, stderr, and/or syslog based on
107  * configuration. The contents of buf is printed out has hex dump. This works
108  * like wpa_hexdump(), but by default, does not include secret keys (passwords,
109  * etc.) in debug output.
110  */
111 void wpa_hexdump_key(int level, const char *title, const void *buf, size_t len);
112 
wpa_hexdump_buf_key(int level,const char * title,const struct wpabuf * buf)113 static inline void wpa_hexdump_buf_key(int level, const char *title,
114 				       const struct wpabuf *buf)
115 {
116 	wpa_hexdump_key(level, title, buf ? wpabuf_head(buf) : NULL,
117 			buf ? wpabuf_len(buf) : 0);
118 }
119 
120 /**
121  * wpa_hexdump_ascii - conditional hex dump
122  * @level: priority level (MSG_*) of the message
123  * @title: title of for the message
124  * @buf: data buffer to be dumped
125  * @len: length of the buf
126  *
127  * This function is used to print conditional debugging and error messages. The
128  * output may be directed to stdout, stderr, and/or syslog based on
129  * configuration. The contents of buf is printed out has hex dump with both
130  * the hex numbers and ASCII characters (for printable range) are shown. 16
131  * bytes per line will be shown.
132  */
133 void wpa_hexdump_ascii(int level, const char *title, const void *buf,
134 		       size_t len);
135 
136 /**
137  * wpa_hexdump_ascii_key - conditional hex dump, hide keys
138  * @level: priority level (MSG_*) of the message
139  * @title: title of for the message
140  * @buf: data buffer to be dumped
141  * @len: length of the buf
142  *
143  * This function is used to print conditional debugging and error messages. The
144  * output may be directed to stdout, stderr, and/or syslog based on
145  * configuration. The contents of buf is printed out has hex dump with both
146  * the hex numbers and ASCII characters (for printable range) are shown. 16
147  * bytes per line will be shown. This works like wpa_hexdump_ascii(), but by
148  * default, does not include secret keys (passwords, etc.) in debug output.
149  */
150 void wpa_hexdump_ascii_key(int level, const char *title, const void *buf,
151 			   size_t len);
152 
153 /*
154  * wpa_dbg() behaves like wpa_msg(), but it can be removed from build to reduce
155  * binary size. As such, it should be used with debugging messages that are not
156  * needed in the control interface while wpa_msg() has to be used for anything
157  * that needs to shown to control interface monitors.
158  */
159 #define wpa_dbg(args...) wpa_msg(args)
160 
161 #endif /* CONFIG_NO_STDOUT_DEBUG */
162 
163 
164 #ifdef CONFIG_NO_WPA_MSG
165 #define wpa_msg(args...) do { } while (0)
166 #define wpa_msg_ctrl(args...) do { } while (0)
167 #define wpa_msg_global(args...) do { } while (0)
168 #define wpa_msg_global_ctrl(args...) do { } while (0)
169 #define wpa_msg_no_global(args...) do { } while (0)
170 #define wpa_msg_global_only(args...) do { } while (0)
171 #define wpa_msg_register_cb(f) do { } while (0)
172 #define wpa_msg_register_ifname_cb(f) do { } while (0)
173 #else /* CONFIG_NO_WPA_MSG */
174 /**
175  * wpa_msg - Conditional printf for default target and ctrl_iface monitors
176  * @ctx: Pointer to context data; this is the ctx variable registered
177  *	with struct wpa_driver_ops::init()
178  * @level: priority level (MSG_*) of the message
179  * @fmt: printf format string, followed by optional arguments
180  *
181  * This function is used to print conditional debugging and error messages. The
182  * output may be directed to stdout, stderr, and/or syslog based on
183  * configuration. This function is like wpa_printf(), but it also sends the
184  * same message to all attached ctrl_iface monitors.
185  *
186  * Note: New line '\n' is added to the end of the text when printing to stdout.
187  */
188 void wpa_msg(void *ctx, int level, const char *fmt, ...) PRINTF_FORMAT(3, 4);
189 
190 /**
191  * wpa_msg_ctrl - Conditional printf for ctrl_iface monitors
192  * @ctx: Pointer to context data; this is the ctx variable registered
193  *	with struct wpa_driver_ops::init()
194  * @level: priority level (MSG_*) of the message
195  * @fmt: printf format string, followed by optional arguments
196  *
197  * This function is used to print conditional debugging and error messages.
198  * This function is like wpa_msg(), but it sends the output only to the
199  * attached ctrl_iface monitors. In other words, it can be used for frequent
200  * events that do not need to be sent to syslog.
201  */
202 void wpa_msg_ctrl(void *ctx, int level, const char *fmt, ...)
203 PRINTF_FORMAT(3, 4);
204 
205 /**
206  * wpa_msg_global - Global printf for ctrl_iface monitors
207  * @ctx: Pointer to context data; this is the ctx variable registered
208  *	with struct wpa_driver_ops::init()
209  * @level: priority level (MSG_*) of the message
210  * @fmt: printf format string, followed by optional arguments
211  *
212  * This function is used to print conditional debugging and error messages.
213  * This function is like wpa_msg(), but it sends the output as a global event,
214  * i.e., without being specific to an interface. For backwards compatibility,
215  * an old style event is also delivered on one of the interfaces (the one
216  * specified by the context data).
217  */
218 void wpa_msg_global(void *ctx, int level, const char *fmt, ...)
219 PRINTF_FORMAT(3, 4);
220 
221 /**
222  * wpa_msg_global_ctrl - Conditional global printf for ctrl_iface monitors
223  * @ctx: Pointer to context data; this is the ctx variable registered
224  *	with struct wpa_driver_ops::init()
225  * @level: priority level (MSG_*) of the message
226  * @fmt: printf format string, followed by optional arguments
227  *
228  * This function is used to print conditional debugging and error messages.
229  * This function is like wpa_msg_global(), but it sends the output only to the
230  * attached global ctrl_iface monitors. In other words, it can be used for
231  * frequent events that do not need to be sent to syslog.
232  */
233 void wpa_msg_global_ctrl(void *ctx, int level, const char *fmt, ...)
234 PRINTF_FORMAT(3, 4);
235 
236 /**
237  * wpa_msg_no_global - Conditional printf for ctrl_iface monitors
238  * @ctx: Pointer to context data; this is the ctx variable registered
239  *	with struct wpa_driver_ops::init()
240  * @level: priority level (MSG_*) of the message
241  * @fmt: printf format string, followed by optional arguments
242  *
243  * This function is used to print conditional debugging and error messages.
244  * This function is like wpa_msg(), but it does not send the output as a global
245  * event.
246  */
247 void wpa_msg_no_global(void *ctx, int level, const char *fmt, ...)
248 PRINTF_FORMAT(3, 4);
249 
250 /**
251  * wpa_msg_global_only - Conditional printf for ctrl_iface monitors
252  * @ctx: Pointer to context data; this is the ctx variable registered
253  *	with struct wpa_driver_ops::init()
254  * @level: priority level (MSG_*) of the message
255  * @fmt: printf format string, followed by optional arguments
256  *
257  * This function is used to print conditional debugging and error messages.
258  * This function is like wpa_msg_global(), but it sends the output only as a
259  * global event.
260  */
261 void wpa_msg_global_only(void *ctx, int level, const char *fmt, ...)
262 PRINTF_FORMAT(3, 4);
263 
264 enum wpa_msg_type {
265 	WPA_MSG_PER_INTERFACE,
266 	WPA_MSG_GLOBAL,
267 	WPA_MSG_NO_GLOBAL,
268 	WPA_MSG_ONLY_GLOBAL,
269 };
270 
271 typedef void (*wpa_msg_cb_func)(void *ctx, int level, enum wpa_msg_type type,
272 				const char *txt, size_t len);
273 
274 /**
275  * wpa_msg_register_cb - Register callback function for wpa_msg() messages
276  * @func: Callback function (%NULL to unregister)
277  */
278 void wpa_msg_register_cb(wpa_msg_cb_func func);
279 
280 typedef const char * (*wpa_msg_get_ifname_func)(void *ctx);
281 void wpa_msg_register_ifname_cb(wpa_msg_get_ifname_func func);
282 
283 #endif /* CONFIG_NO_WPA_MSG */
284 
285 #ifdef CONFIG_NO_HOSTAPD_LOGGER
286 #define hostapd_logger(args...) do { } while (0)
287 #define hostapd_logger_register_cb(f) do { } while (0)
288 #else /* CONFIG_NO_HOSTAPD_LOGGER */
289 void hostapd_logger(void *ctx, const u8 *addr, unsigned int module, int level,
290 		    const char *fmt, ...) PRINTF_FORMAT(5, 6);
291 
292 typedef void (*hostapd_logger_cb_func)(void *ctx, const u8 *addr,
293 				       unsigned int module, int level,
294 				       const char *txt, size_t len);
295 
296 /**
297  * hostapd_logger_register_cb - Register callback function for hostapd_logger()
298  * @func: Callback function (%NULL to unregister)
299  */
300 void hostapd_logger_register_cb(hostapd_logger_cb_func func);
301 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
302 
303 #define HOSTAPD_MODULE_IEEE80211	0x00000001
304 #define HOSTAPD_MODULE_IEEE8021X	0x00000002
305 #define HOSTAPD_MODULE_RADIUS		0x00000004
306 #define HOSTAPD_MODULE_WPA		0x00000008
307 #define HOSTAPD_MODULE_DRIVER		0x00000010
308 #define HOSTAPD_MODULE_IAPP		0x00000020
309 #define HOSTAPD_MODULE_MLME		0x00000040
310 
311 enum hostapd_logger_level {
312 	HOSTAPD_LEVEL_DEBUG_VERBOSE = 0,
313 	HOSTAPD_LEVEL_DEBUG = 1,
314 	HOSTAPD_LEVEL_INFO = 2,
315 	HOSTAPD_LEVEL_NOTICE = 3,
316 	HOSTAPD_LEVEL_WARNING = 4
317 };
318 
319 
320 #ifdef CONFIG_DEBUG_SYSLOG
321 
322 void wpa_debug_open_syslog(void);
323 void wpa_debug_close_syslog(void);
324 
325 #else /* CONFIG_DEBUG_SYSLOG */
326 
wpa_debug_open_syslog(void)327 static inline void wpa_debug_open_syslog(void)
328 {
329 }
330 
wpa_debug_close_syslog(void)331 static inline void wpa_debug_close_syslog(void)
332 {
333 }
334 
335 #endif /* CONFIG_DEBUG_SYSLOG */
336 
337 #ifdef CONFIG_DEBUG_LINUX_TRACING
338 
339 int wpa_debug_open_linux_tracing(void);
340 void wpa_debug_close_linux_tracing(void);
341 
342 #else /* CONFIG_DEBUG_LINUX_TRACING */
343 
wpa_debug_open_linux_tracing(void)344 static inline int wpa_debug_open_linux_tracing(void)
345 {
346 	return 0;
347 }
348 
wpa_debug_close_linux_tracing(void)349 static inline void wpa_debug_close_linux_tracing(void)
350 {
351 }
352 
353 #endif /* CONFIG_DEBUG_LINUX_TRACING */
354 
355 
356 #ifdef EAPOL_TEST
357 #define WPA_ASSERT(a)						       \
358 	do {							       \
359 		if (!(a)) {					       \
360 			printf("WPA_ASSERT FAILED '" #a "' "	       \
361 			       "%s %s:%d\n",			       \
362 			       __FUNCTION__, __FILE__, __LINE__);      \
363 			exit(1);				       \
364 		}						       \
365 	} while (0)
366 #else
367 #define WPA_ASSERT(a) do { } while (0)
368 #endif
369 
370 const char * debug_level_str(int level);
371 int str_to_debug_level(const char *s);
372 
373 #endif /* WPA_DEBUG_H */
374