/* * wavemon - a wireless network monitoring aplication * * Copyright (c) 2001-2002 Jan Morgenstern * Copyright (c) 2009 Gerrit Renker * * wavemon is free software; you can redistribute it and/or modify it under * the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2, or (at your option) any later * version. * * wavemon is distributed in the hope that it will be useful, but WITHOUT ANY * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License along * with wavemon; see the file COPYING. If not, write to the Free Software * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "llist.h" #define CFNAME ".wavemonrc" /* * Minimum screen dimensions. * The number of lines depends on the size requirements of scr_info(). The * number of columns comes from the menubar length (10 items of length 6 * plus the 'Fxx'). This value was also chosen since 24x80 is a very common * screen size, in particular allowing the use on the console. */ enum info_screen_geometry { WH_IFACE = 2, /* 'Interface' area at the top */ WH_LEVEL = 9, /* Level meters (signal/noise/SNR) */ WH_STATS = 3, /* WiFi statistics area */ WH_INFO_MIN = 6, /* WiFi information area */ WH_NET_MIN = 3, /* Network interface information area */ WH_NET_MAX = 5, /* Network interface information area */ WH_MENU = 1 /* Menu bar at the bottom */ }; #define WH_INFO_SCR_BASE (WH_IFACE + WH_LEVEL + WH_STATS + WH_MENU) #define WH_INFO_SCR_MIN (WH_INFO_SCR_BASE + WH_INFO_MIN + WH_NET_MIN) #define MIN_SCREEN_LINES WH_INFO_SCR_MIN #define MIN_SCREEN_COLS 80 /* * Screen layout constants. * * All windows extend over the whole screen width; the vertical number of * rows is reduced by one due to the menubar at the bottom of the screen. */ #define WAV_WIDTH (COLS) #define WAV_HEIGHT (LINES-1) /* * Maximum lengths/coordinates inside the bordered screen. * * The printable window area is constrained by the frame lines connecting * the corner points (0, 0), (0, COLS-1), (LINES-1, 0), (LINES-1, COLS-1). */ #define MAXXLEN (WAV_WIDTH - 2) #define MAXYLEN (WAV_HEIGHT - 2) /* Number of seconds to display a warning message outside ncurses mode */ #define WARN_DISPLAY_DELAY 3 /* * Symbolic names of actions to take when crossing thresholds. * These actions invoke the corresponding ncurses functions. */ enum threshold_action { TA_DISABLED, TA_BEEP, TA_FLASH, TA_BEEP_FLASH }; static inline void threshold_action(enum threshold_action action) { if (action & TA_FLASH) flash(); if (action & TA_BEEP) beep(); } /* * Global in-memory representation of current wavemon configuration state */ extern struct wavemon_conf { int if_idx; /* Index into interface list */ int stat_iv, info_iv; int sig_min, sig_max, noise_min, noise_max; int lthreshold, hthreshold; int slotsize, meter_decay; /* Boolean values */ int check_geometry, /* ensure window is large enough */ cisco_mac, /* Cisco-style MAC addresses */ random, /* random signals */ override_bounds; /* override autodetection */ /* Enumerated values */ int lthreshold_action, /* disabled|beep|flash|beep+flash */ hthreshold_action, /* disabled|beep|flash|beep+flash */ startup_scr; /* info|histogram|aplist */ } conf; /* * Initialisation & Configuration */ extern void getconf(int argc, char *argv[]); /* Configuration items to manipulate the current configuration */ struct conf_item { char *name, /* name for preferences screen */ *cfname; /* name for ~/.wavemonrc */ enum { /* type of parameter */ t_int, /* @v.i is interpreted as raw value */ t_list, /* @v.i is an index into @list */ t_sep, /* dummy, separator entry */ t_func /* void (*fp) (void) */ } type; union { /* type-dependent container for value */ int *i; /* t_int and t_list index into @list */ void (*fp)(); /* t_func */ } v; char **list; /* t_list: NULL-terminated array of strings */ int *dep; /* dependency */ double min, /* value boundaries */ max, inc; /* increment for value changes */ char *unit; /* name of units to display */ }; /* * Screen functions */ enum wavemon_screen { SCR_INFO, /* F1 */ SCR_LHIST, /* F2 */ SCR_APLIST, /* F3 */ SCR_EMPTY_F4, /* placeholder */ SCR_EMPTY_F5, /* placeholder */ SCR_EMPTY_F6, /* placeholder */ SCR_CONF, /* F7 */ SCR_HELP, /* F8 */ SCR_ABOUT, /* F9 */ SCR_QUIT /* F10 */ }; extern void scr_info_init(void); extern int scr_info_loop(WINDOW *w_menu); extern void scr_info_fini(void); extern void scr_lhist_init(void); extern int scr_lhist_loop(WINDOW *w_menu); extern void scr_lhist_fini(void); extern void scr_aplst_init(void); extern int scr_aplst_loop(WINDOW *w_menu); extern void scr_aplst_fini(void); extern void scr_conf_init(void); extern int scr_conf_loop(WINDOW *w_menu); extern void scr_conf_fini(void); extern void scr_help_init(void); extern int scr_help_loop(WINDOW *w_menu); extern void scr_help_fini(void); extern void scr_about_init(void); extern int scr_about_loop(WINDOW *w_menu); extern void scr_about_fini(void); /* * Ncurses definitions and functions */ extern WINDOW *newwin_title(int y, int h, const char *title, bool nobottom); extern WINDOW *wmenubar(const enum wavemon_screen active); extern void wclrtoborder(WINDOW *win); extern void mvwclrtoborder(WINDOW *win, int y, int x); extern void waddstr_b(WINDOW * win, const char *s); extern void waddstr_center(WINDOW * win, int y, const char *s); extern const char *curtail(const char *str, const char *sep, int len); extern void waddbar(WINDOW *win, int y, float v, float min, float max, char *cscale, bool rev); extern void waddthreshold(WINDOW *win, int y, float v, float tv, float minv, float maxv, char *cscale, chtype tch); enum colour_pair { CP_STANDARD = 1, CP_SCALEHI, CP_SCALEMID, CP_SCALELOW, CP_WTITLE, CP_INACTIVE, CP_ACTIVE, CP_STATSIG, CP_STATNOISE, CP_STATSNR, CP_STATBKG, CP_STATSIG_S, CP_STATNOISE_S, CP_PREF_NORMAL, CP_PREF_SELECT, CP_PREF_ARROW, CP_SCAN_CRYPT, CP_SCAN_UNENC, CP_SCAN_NON_AP }; static inline int cp_from_scale(float value, const char *cscale, bool reverse) { enum colour_pair cp; if (value < (float)cscale[0]) cp = reverse ? CP_SCALEHI : CP_SCALELOW; else if (value < (float)cscale[1]) cp = CP_SCALEMID; else cp = reverse ? CP_SCALELOW : CP_SCALEHI; return COLOR_PAIR(cp); } /* * Wireless interfaces */ extern const char *conf_ifname(void); extern void conf_get_interface_list(void); extern char **iw_get_interface_list(void); extern void dump_parameters(void); /* * Timers */ struct timer { unsigned long long stime; unsigned long duration; }; extern void start_timer(struct timer *t, unsigned long d); extern int end_timer(struct timer *t); /* * Error handling */ extern bool has_net_admin_capability(void); extern void err_msg(const char *format, ...); extern void err_quit(const char *format, ...); extern void err_sys(const char *format, ...); /* * Helper functions */ #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) static inline void (*xsignal(int signo, void (*handler)(int)))(int) { struct sigaction old_sa, sa = { .sa_handler = handler, .sa_flags = 0 }; if (sigemptyset(&sa.sa_mask) < 0 || sigaction(signo, &sa, &old_sa) < 0) err_sys("xsignal(%d) failed", signo); return old_sa.sa_handler; } static inline size_t argv_count(char **argv) { int cnt = 0; assert(argv != NULL); while (*argv++) cnt++; return cnt; } static inline int argv_find(char **argv, const char *what) { int cnt = argv_count(argv), len, i; assert(what != NULL); for (i = 0, len = strlen(what); i < cnt; i++) if (strncasecmp(argv[i], what, len) == 0) return i; return -1; } static inline void str_tolower(char *s) { for (; s && *s; s++) *s = tolower(*s); } /* Check if @str is printable (compare iw_essid_escape()) */ static inline bool str_is_ascii(char *s) { if (!s || !*s) return false; for (; *s; s++) if (!isascii(*s) || iscntrl(*s)) return false; return true; } /* number of digits needed to display integer part of @val */ static inline int num_int_digits(const double val) { return 1 + (val > 1.0 ? log10(val) : val < -1.0 ? log10(-val) : 0); } static inline int max(const int a, const int b) { return a > b ? a : b; } static inline bool in_range(int val, int min, int max) { return min <= val && val <= max; } static inline int clamp(int val, int min, int max) { return val < min ? min : (val > max ? max : val); } /* SI units -- see units(7) */ static inline char *byte_units(const double bytes) { static char result[0x100]; if (bytes >= 1 << 30) sprintf(result, "%0.2lf GiB", bytes / (1 << 30)); else if (bytes >= 1 << 20) sprintf(result, "%0.2lf MiB", bytes / (1 << 20)); else if (bytes >= 1 << 10) sprintf(result, "%0.2lf KiB", bytes / (1 << 10)); else sprintf(result, "%.0lf B", bytes); return result; } /** * Compute exponentially weighted moving average * @mavg: old value of the moving average * @sample: new sample to update @mavg * @weight: decay factor for new samples, 0 < weight <= 1 */ static inline double ewma(double mavg, double sample, double weight) { return mavg == 0 ? sample : weight * mavg + (1.0 - weight) * sample; } /* map 0.0 <= ratio <= 1.0 into min..max */ static inline double map_val(double ratio, double min, double max) { return min + ratio * (max - min); } /* map minv <= val <= maxv into the range min..max (no clamping) */ static inline double map_range(double val, double minv, double maxv, double min, double max) { return map_val((val - minv) / (maxv - minv), min, max); } /* map val into the reverse range max..min */ static inline int reverse_range(int val, int min, int max) { assert(min <= val && val <= max); return max - (val - min); } a id='n229' href='#n229'>229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342