X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Foping.c;h=a74cd420a8e5567a5907d6faca5db76e4ff4067c;hb=a18b31772ddeab5d911f5cc8b7eecb340fabe879;hp=7058ac0480ac82d6bd5cb5f700fb2c8d51a1d4c6;hpb=b87c48d5f2b5120d580e3e0527b6c9b04d9b64ba;p=liboping.git diff --git a/src/oping.c b/src/oping.c index 7058ac0..a74cd42 100644 --- a/src/oping.c +++ b/src/oping.c @@ -1,6 +1,6 @@ /** * Object oriented C module to send ICMP and ICMPv6 `echo's. - * Copyright (C) 2006-2010 Florian octo Forster + * Copyright (C) 2006-2014 Florian octo Forster * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -74,21 +74,78 @@ #include #endif +#include +#include + #if USE_NCURSES # define NCURSES_OPAQUE 1 -# include +/* http://newsgroups.derkeiler.com/Archive/Rec/rec.games.roguelike.development/2010-09/msg00050.html */ +# define _X_OPEN_SOURCE_EXTENDED + +# if HAVE_NCURSESW_NCURSES_H +# include +# elif HAVE_NCURSES_H +# include +# endif # define OPING_GREEN 1 # define OPING_YELLOW 2 # define OPING_RED 3 +# define OPING_GREEN_HIST 4 +# define OPING_YELLOW_HIST 5 +# define OPING_RED_HIST 6 + +double const threshold_green = 0.8; +double const threshold_yellow = 0.95; + +static char const * const hist_symbols_utf8[] = { + "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█" }; +static size_t const hist_symbols_utf8_num = sizeof (hist_symbols_utf8) + / sizeof (hist_symbols_utf8[0]); + +/* scancodes for 6 levels of horizontal bars, ncurses-specific */ +/* those are not the usual constants because those are not constant */ +static int const hist_symbols_acs[] = { + 115, /* ACS_S9 "⎽" */ + 114, /* ACS_S7 "⎼" */ + 113, /* ACS_S5 "─" */ + 112, /* ACS_S3 "⎻" */ + 111 /* ACS_S1 "⎺" */ +}; +static size_t const hist_symbols_acs_num = sizeof (hist_symbols_acs) + / sizeof (hist_symbols_acs[0]); + +/* use different colors without a background for scancodes */ +static int const hist_colors_utf8[] = { + OPING_GREEN_HIST, OPING_YELLOW_HIST, OPING_RED_HIST }; +static int const hist_colors_acs[] = { + OPING_GREEN, OPING_YELLOW, OPING_RED }; +/* assuming that both arrays are the same size */ +static size_t const hist_colors_num = sizeof (hist_colors_utf8) + / sizeof (hist_colors_utf8[0]); #endif +/* "─" */ +#define BOXPLOT_WHISKER_BAR (113 | A_ALTCHARSET) +/* "├" */ +#define BOXPLOT_WHISKER_LEFT_END (116 | A_ALTCHARSET) +/* "┤" */ +#define BOXPLOT_WHISKER_RIGHT_END (117 | A_ALTCHARSET) +/* Inverted */ +#define BOXPLOT_BOX ' ' +/* "│", inverted */ +#define BOXPLOT_MEDIAN (120 | A_ALTCHARSET) + #include "oping.h" #ifndef _POSIX_SAVED_IDS # define _POSIX_SAVED_IDS 0 #endif +#ifndef IPTOS_MINCOST +# define IPTOS_MINCOST 0x02 +#endif + /* Remove GNU specific __attribute__ settings when using another compiler */ #if !__GNUC__ # define __attribute__(x) /**/ @@ -103,10 +160,31 @@ typedef struct ping_context int req_sent; int req_rcvd; - double latency_min; - double latency_max; double latency_total; - double latency_total_square; + +#ifndef HISTORY_SIZE_MAX +# define HISTORY_SIZE_MAX 900 +#endif + /* The last n RTTs in the order they were sent. */ + double history_by_time[HISTORY_SIZE_MAX]; + + /* Current number of entries in the history. This is a value between 0 + * and HISTORY_SIZE_MAX. */ + size_t history_size; + + /* Number "received" entries in the history, i.e. non-NAN entries. */ + size_t history_received; + + /* Index of the next RTT to be written to history_by_time. This wraps + * around to 0 once the histroty has grown to HISTORY_SIZE_MAX. */ + size_t history_index; + + /* The last history_size RTTs sorted by value. timed out packets (NAN + * entries) are sorted to the back. */ + double history_by_value[HISTORY_SIZE_MAX]; + + /* If set to true, history_by_value has to be re-calculated. */ + _Bool history_dirty; #if USE_NCURSES WINDOW *window; @@ -121,6 +199,13 @@ static char *opt_filename = NULL; static int opt_count = -1; static int opt_send_ttl = 64; static uint8_t opt_send_qos = 0; +#define OPING_DEFAULT_PERCENTILE 95.0 +static double opt_percentile = -1.0; +static double opt_exit_status_threshold = 1.0; +#if USE_NCURSES +static int opt_show_graph = 1; +static int opt_utf8 = 0; +#endif static int host_num = 0; @@ -145,10 +230,7 @@ static ping_context_t *context_create (void) /* {{{ */ memset (ret, '\0', sizeof (ping_context_t)); - ret->latency_min = -1.0; - ret->latency_max = -1.0; ret->latency_total = 0.0; - ret->latency_total_square = 0.0; #if USE_NCURSES ret->window = NULL; @@ -173,37 +255,126 @@ static void context_destroy (ping_context_t *context) /* {{{ */ free (context); } /* }}} void context_destroy */ -static double context_get_average (ping_context_t *ctx) /* {{{ */ +static int compare_double (void const *arg0, void const *arg1) /* {{{ */ { - double num_total; + double dbl0 = *((double *) arg0); + double dbl1 = *((double *) arg1); - if (ctx == NULL) - return (-1.0); + if (isnan (dbl0)) + { + if (isnan (dbl1)) + return 0; + else + return 1; + } + else if (isnan (dbl1)) + return -1; + else if (dbl0 < dbl1) + return -1; + else if (dbl0 > dbl1) + return 1; + else + return 0; +} /* }}} int compare_double */ + +static void clean_history (ping_context_t *ctx) /* {{{ */ +{ + size_t i; + + if (!ctx->history_dirty) + return; + + /* Copy all values from by_time to by_value. */ + memcpy (ctx->history_by_value, ctx->history_by_time, + sizeof (ctx->history_by_time)); - if (ctx->req_rcvd < 1) - return (-0.0); + /* Sort all RTTs. */ + qsort (ctx->history_by_value, ctx->history_size, sizeof + (ctx->history_by_value[0]), compare_double); - num_total = (double) ctx->req_rcvd; - return (ctx->latency_total / num_total); -} /* }}} double context_get_average */ + /* Update the number of received RTTs. */ + ctx->history_received = 0; + for (i = 0; i < ctx->history_size; i++) + if (!isnan (ctx->history_by_value[i])) + ctx->history_received++; -static double context_get_stddev (ping_context_t *ctx) /* {{{ */ + /* Mark as clean. */ + ctx->history_dirty = 0; +} /* }}} void clean_history */ + +static double percentile_to_latency (ping_context_t *ctx, /* {{{ */ + double percentile) { - double num_total; + size_t index; - if (ctx == NULL) - return (-1.0); + clean_history (ctx); - if (ctx->req_rcvd < 1) - return (-0.0); - else if (ctx->req_rcvd < 2) - return (0.0); + /* Not a single packet was received successfully. */ + if (ctx->history_received == 0) + return NAN; + + if (percentile <= 0.0) + index = 0; + else if (percentile >= 100.0) + index = ctx->history_received - 1; + else + { + index = (size_t) ceil ((percentile / 100.0) * ((double) ctx->history_received)); + assert (index > 0); + index--; + } + + return (ctx->history_by_value[index]); +} /* }}} double percentile_to_latency */ + +#if USE_NCURSES +static double latency_to_ratio (ping_context_t *ctx, /* {{{ */ + double latency) +{ + size_t low; + size_t high; + size_t index; + + clean_history (ctx); + + /* Not a single packet was received successfully. */ + if (ctx->history_received == 0) + return NAN; + + low = 0; + high = ctx->history_received - 1; + + if (latency < ctx->history_by_value[low]) + return 0.0; + else if (latency >= ctx->history_by_value[high]) + return 100.0; + + /* Do a binary search for the latency. This will work even when the + * exact latency is not in the array. If the latency is in the array + * multiple times, "low" will be set to the index of the last + * occurrence. The value at index "high" will be larger than the + * searched for latency (assured by the above "if" block. */ + while ((high - low) > 1) + { + index = (high + low) / 2; - num_total = (double) ctx->req_rcvd; - return (sqrt (((num_total * ctx->latency_total_square) - - (ctx->latency_total * ctx->latency_total)) - / (num_total * (num_total - 1.0)))); -} /* }}} double context_get_stddev */ + if (ctx->history_by_value[index] > latency) + high = index; + else + low = index; + } + + assert (ctx->history_by_value[high] > latency); + assert (ctx->history_by_value[low] <= latency); + + if (ctx->history_by_value[low] == latency) + index = low; + else + index = high; + + return (((double) (index + 1)) / ((double) ctx->history_received)); +} /* }}} double latency_to_ratio */ +#endif static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */ { @@ -265,6 +436,13 @@ static void usage_exit (const char *name, int status) /* {{{ */ " -I srcaddr source address\n" " -D device outgoing interface name\n" " -f filename filename to read hosts from\n" +#if USE_NCURSES + " -u / -U force / disable UTF-8 output\n" + " -g graph graph type to draw\n" +#endif + " -P percent Report the n'th percentile of latency\n" + " -Z percent Exit with non-zero exit status if more than this percentage of\n" + " probes timed out. (default: never)\n" "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n" "by Florian octo Forster \n" @@ -273,6 +451,7 @@ static void usage_exit (const char *name, int status) /* {{{ */ exit (status); } /* }}} void usage_exit */ +__attribute__((noreturn)) static void usage_qos_exit (const char *arg, int status) /* {{{ */ { if (arg != 0) @@ -334,8 +513,8 @@ static int set_opt_send_qos (const char *opt) /* {{{ */ && (strlen (opt) == 4)) { uint8_t dscp; - uint8_t class; - uint8_t prec; + uint8_t class = 0; + uint8_t prec = 0; /* There are four classes, AF1x, AF2x, AF3x, and AF4x. */ if (opt[2] == '1') @@ -466,7 +645,11 @@ static int read_options (int argc, char **argv) /* {{{ */ while (1) { - optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:"); + optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:Z:P:" +#if USE_NCURSES + "uUg:" +#endif + ); if (optchar == -1) break; @@ -483,7 +666,12 @@ static int read_options (int argc, char **argv) /* {{{ */ int new_count; new_count = atoi (optarg); if (new_count > 0) + { opt_count = new_count; + + if ((opt_percentile < 0.0) && (opt_count < 20)) + opt_percentile = 100.0 * (opt_count - 1) / opt_count; + } else fprintf(stderr, "Ignoring invalid count: %s\n", optarg); @@ -509,6 +697,7 @@ static int read_options (int argc, char **argv) /* {{{ */ opt_interval = new_interval; } break; + case 'I': { if (opt_srcaddr != NULL) @@ -537,14 +726,72 @@ static int read_options (int argc, char **argv) /* {{{ */ set_opt_send_qos (optarg); break; + case 'P': + { + double new_percentile; + new_percentile = atof (optarg); + if (isnan (new_percentile) + || (new_percentile < 0.1) + || (new_percentile > 100.0)) + fprintf (stderr, "Ignoring invalid percentile: %s\n", + optarg); + else + opt_percentile = new_percentile; + } + break; + +#if USE_NCURSES + case 'g': + if (strcasecmp ("none", optarg) == 0) + opt_show_graph = 0; + else if (strcasecmp ("prettyping", optarg) == 0) + opt_show_graph = 1; + else if (strcasecmp ("histogram", optarg) == 0) + opt_show_graph = 2; + else if (strcasecmp ("boxplot", optarg) == 0) + opt_show_graph = 3; + else + fprintf (stderr, "Unknown graph option: %s\n", optarg); + break; + + case 'u': + opt_utf8 = 2; + break; + case 'U': + opt_utf8 = 1; + break; +#endif + + case 'Z': + { + char *endptr = NULL; + double tmp; + + errno = 0; + tmp = strtod (optarg, &endptr); + if ((errno != 0) || (endptr == NULL) || (*endptr != 0) || (tmp < 0.0) || (tmp > 100.0)) + { + fprintf (stderr, "Ignoring invalid -Z argument: %s\n", optarg); + fprintf (stderr, "The \"-Z\" option requires a numeric argument between 0 and 100.\n"); + } + else + opt_exit_status_threshold = tmp / 100.0; + + break; + } + case 'h': usage_exit (argv[0], 0); break; + default: usage_exit (argv[0], 1); } } + if (opt_percentile <= 0.0) + opt_percentile = OPING_DEFAULT_PERCENTILE; + return (optind); } /* }}} read_options */ @@ -596,12 +843,349 @@ static void time_calc (struct timespec *ts_dest, /* {{{ */ } /* }}} void time_calc */ #if USE_NCURSES -static int update_stats_from_context (ping_context_t *ctx) /* {{{ */ +static _Bool has_utf8() /* {{{ */ +{ +# if HAVE_NCURSESW_NCURSES_H + if (!opt_utf8) + { + /* Automatically determine */ + if (strcasecmp ("UTF-8", nl_langinfo (CODESET)) == 0) + opt_utf8 = 2; + else + opt_utf8 = 1; + } + return ((_Bool) (opt_utf8 - 1)); +# else + return (0); +# endif +} /* }}} _Bool has_utf8 */ + +static int update_graph_boxplot (ping_context_t *ctx) /* {{{ */ +{ + uint32_t *counters; + double *ratios; + size_t i; + size_t x_max; + size_t x; + + clean_history (ctx); + + if (ctx->history_received == 0) + return (ENOENT); + + x_max = (size_t) getmaxx (ctx->window); + if (x_max <= 8) + return (EINVAL); + x_max -= 4; + + counters = calloc (x_max, sizeof (*counters)); + ratios = calloc (x_max, sizeof (*ratios)); + + /* Bucketize */ + for (i = 0; i < ctx->history_received; i++) + { + double latency = ctx->history_by_value[i] / 1000.0; + size_t index = (size_t) (((double) x_max) * latency / opt_interval); + + if (index >= x_max) + index = x_max - 1; + + counters[index]++; + } + + /* Sum and calc ratios */ + ratios[0] = ((double) counters[0]) / ((double) ctx->history_received); + for (x = 1; x < x_max; x++) + { + counters[x] += counters[x - 1]; + ratios[x] = ((double) counters[x]) / ((double) ctx->history_received); + } + + for (x = 0; x < x_max; x++) + { + int symbol = ' '; + _Bool reverse = 0; + + if (x == 0) + { + if (ratios[x] >= 0.5) + { + symbol = BOXPLOT_MEDIAN; + reverse = 1; + } + else if (ratios[x] > 0.25) + { + symbol = BOXPLOT_BOX; + reverse = 1; + } + else if (ratios[x] > 0.025) + symbol = BOXPLOT_WHISKER_BAR; + else + symbol = ' '; /* NOP */ + } + else /* (x != 0) */ + { + if ((ratios[x - 1] < 0.5) && (ratios[x] >= 0.5)) + { + symbol = BOXPLOT_MEDIAN; + reverse = 1; + } + else if (((ratios[x] >= 0.25) && (ratios[x] <= 0.75)) + || ((ratios[x - 1] < 0.75) && (ratios[x] > 0.75))) + { + symbol = BOXPLOT_BOX; + reverse = 1; + } + else if ((ratios[x] < 0.5) && (ratios[x] >= 0.025)) + { + if (ratios[x - 1] < 0.025) + symbol = BOXPLOT_WHISKER_LEFT_END; + else + symbol = BOXPLOT_WHISKER_BAR; + } + else if ((ratios[x] > .5) && (ratios[x] < 0.975)) + { + symbol = BOXPLOT_WHISKER_BAR; + } + else if ((ratios[x] >= 0.975) && (ratios[x - 1] < 0.975)) + symbol = BOXPLOT_WHISKER_RIGHT_END; + } + + if (reverse) + wattron (ctx->window, A_REVERSE); + mvwaddch (ctx->window, /* y = */ 3, /* x = */ (int) (x + 2), symbol); + // mvwprintw (ctx->window, /* y = */ 3, /* x = */ (int) (x + 2), symbol); + if (reverse) + wattroff (ctx->window, A_REVERSE); + } + + free (counters); + free (ratios); + return (0); +} /* }}} int update_graph_boxplot */ + +static int update_graph_prettyping (ping_context_t *ctx, /* {{{ */ + double latency, unsigned int sequence) +{ + size_t x; + size_t x_max; + size_t history_offset; + + x_max = (size_t) getmaxx (ctx->window); + if (x_max <= 4) + return (EINVAL); + x_max -= 4; + + /* Determine the first index in the history we need to draw + * the graph. */ + history_offset = 0; + if (((size_t) x_max) < ctx->history_size) + { + if (ctx->history_index > x_max) + history_offset = ctx->history_index - x_max; + else /* wrap around */ + history_offset = ctx->history_index + x_max - ctx->history_size; + } + + for (x = 0; x < x_max; x++) + { + size_t index; + double latency; + + int color = OPING_RED; + char const *symbol = "!"; + int symbolc = '!'; + + if (x >= ctx->history_size) + { + mvwaddch (ctx->window, /* y = */ 3, /* x = */ x + 2, ' '); + continue; + } + + index = (history_offset + x) % ctx->history_size; + latency = ctx->history_by_time[index]; + + if (latency >= 0.0) + { + double ratio; + + size_t symbols_num = hist_symbols_acs_num; + size_t colors_num = 1; + + size_t index_symbols; + size_t index_colors; + size_t intensity; + + /* latency is in milliseconds, opt_interval is in seconds. */ + ratio = (latency * 0.001) / opt_interval; + if (ratio > 1) { + ratio = 1.0; + } + + if (has_utf8 ()) + symbols_num = hist_symbols_utf8_num; + + if (has_colors () == TRUE) + colors_num = hist_colors_num; + + intensity = (size_t) (ratio * ((double) (symbols_num * colors_num))); + if (intensity >= (symbols_num * colors_num)) + intensity = (symbols_num * colors_num) - 1; + + index_symbols = intensity % symbols_num; + assert (index_symbols < symbols_num); + + index_colors = intensity / symbols_num; + assert (index_colors < colors_num); + + if (has_utf8()) + { + color = hist_colors_utf8[index_colors]; + symbol = hist_symbols_utf8[index_symbols]; + } + else + { + color = hist_colors_acs[index_colors]; + symbolc = hist_symbols_acs[index_symbols] | A_ALTCHARSET; + } + } + else /* if (!(latency >= 0.0)) */ + wattron (ctx->window, A_BOLD); + + if (has_colors () == TRUE) + wattron (ctx->window, COLOR_PAIR(color)); + + if (has_utf8()) + mvwprintw (ctx->window, /* y = */ 3, /* x = */ x + 2, symbol); + else + mvwaddch (ctx->window, /* y = */ 3, /* x = */ x + 2, symbolc); + + if (has_colors () == TRUE) + wattroff (ctx->window, COLOR_PAIR(color)); + + /* Use negation here to handle NaN correctly. */ + if (!(latency >= 0.0)) + wattroff (ctx->window, A_BOLD); + } /* for (x) */ + + return (0); +} /* }}} int update_graph_prettyping */ + +static int update_graph_histogram (ping_context_t *ctx) /* {{{ */ +{ + uint32_t *counters; + uint32_t *accumulated; + uint32_t max; + size_t i; + size_t x_max; + size_t x; + + size_t symbols_num = hist_symbols_acs_num; + + clean_history (ctx); + + if (ctx->history_received == 0) + return (ENOENT); + + if (has_utf8 ()) + symbols_num = hist_symbols_utf8_num; + + x_max = (size_t) getmaxx (ctx->window); + if (x_max <= 4) + return (EINVAL); + x_max -= 4; + + counters = calloc (x_max, sizeof (*counters)); + accumulated = calloc (x_max, sizeof (*accumulated)); + + /* Bucketize */ + max = 0; + for (i = 0; i < ctx->history_received; i++) + { + double latency = ctx->history_by_value[i] / 1000.0; + size_t index = (size_t) (((double) x_max) * latency / opt_interval); + + if (index >= x_max) + index = x_max - 1; + + counters[index]++; + if (max < counters[index]) + max = counters[index]; + } + + /* Sum */ + accumulated[0] = counters[0]; + for (x = 1; x < x_max; x++) + accumulated[x] = counters[x] + accumulated[x - 1]; + + /* Calculate ratios */ + for (x = 0; x < x_max; x++) + { + double height = ((double) counters[x]) / ((double) max); + double ratio_this = ((double) accumulated[x]) / ((double) ctx->history_received); + double ratio_prev = 0.0; + size_t index; + int color = 0; + + index = (size_t) (height * ((double) symbols_num)); + if (index >= symbols_num) + index = symbols_num - 1; + + if (x > 0) + ratio_prev = ((double) accumulated[x - 1]) / ((double) ctx->history_received); + + if (has_colors () == TRUE) + { + if ((ratio_this <= threshold_green) + || ((ratio_prev < threshold_green) + && (ratio_this > threshold_green))) + color = OPING_GREEN; + else if ((ratio_this <= threshold_yellow) + || ((ratio_prev < threshold_yellow) + && (ratio_this > threshold_yellow))) + color = OPING_YELLOW; + else + color = OPING_RED; + + wattron (ctx->window, COLOR_PAIR(color)); + } + + if (counters[x] == 0) + mvwaddch (ctx->window, /* y = */ 3, /* x = */ x + 2, ' '); + else if (has_utf8 ()) + mvwprintw (ctx->window, /* y = */ 3, /* x = */ x + 2, + hist_symbols_utf8[index]); + else + mvwaddch (ctx->window, /* y = */ 3, /* x = */ x + 2, + hist_symbols_acs[index] | A_ALTCHARSET); + + if (has_colors () == TRUE) + wattroff (ctx->window, COLOR_PAIR(color)); + + } + + free (accumulated); + return (0); +} /* }}} int update_graph_histogram */ + +static int update_stats_from_context (ping_context_t *ctx, pingobj_iter_t *iter) /* {{{ */ { + double latency = -1.0; + size_t buffer_len = sizeof (latency); + + ping_iterator_get_info (iter, PING_INFO_LATENCY, + &latency, &buffer_len); + + unsigned int sequence = 0; + buffer_len = sizeof (sequence); + ping_iterator_get_info (iter, PING_INFO_SEQUENCE, + &sequence, &buffer_len); + + if ((ctx == NULL) || (ctx->window == NULL)) return (EINVAL); - werase (ctx->window); + /* werase (ctx->window); */ box (ctx->window, 0, 0); wattron (ctx->window, A_BOLD); @@ -617,20 +1201,28 @@ static int update_stats_from_context (ping_context_t *ctx) /* {{{ */ ctx->latency_total); if (ctx->req_rcvd != 0) { - double average; - double deviation; + double min; + double median; + double max; + double percentile; + + min = percentile_to_latency (ctx, 0.0); + median = percentile_to_latency (ctx, 50.0); + max = percentile_to_latency (ctx, 100.0); + percentile = percentile_to_latency (ctx, opt_percentile); - average = context_get_average (ctx); - deviation = context_get_stddev (ctx); - mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2, - "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms", - ctx->latency_min, - average, - ctx->latency_max, - deviation); + "RTT[ms]: min = %.0f, median = %.0f, p(%.0f) = %.0f, max = %.0f", + min, median, opt_percentile, percentile, max); } + if (opt_show_graph == 1) + update_graph_prettyping (ctx, latency, sequence); + else if (opt_show_graph == 2) + update_graph_histogram (ctx); + else if (opt_show_graph == 3) + update_graph_boxplot (ctx); + wrefresh (ctx->window); return (0); @@ -642,12 +1234,13 @@ static int on_resize (pingobj_t *ping) /* {{{ */ int width = 0; int height = 0; int main_win_height; + int box_height = (opt_show_graph == 0) ? 4 : 5; getmaxyx (stdscr, height, width); if ((height < 1) || (width < 1)) return (EINVAL); - main_win_height = height - (4 * host_num); + main_win_height = height - (box_height * host_num); wresize (main_win, main_win_height, /* width = */ width); /* Allow scrolling */ scrollok (main_win, TRUE); @@ -671,9 +1264,9 @@ static int on_resize (pingobj_t *ping) /* {{{ */ delwin (context->window); context->window = NULL; } - context->window = newwin (/* height = */ 4, - /* width = */ 0, - /* y = */ main_win_height + (4 * context->index), + context->window = newwin (/* height = */ box_height, + /* width = */ width, + /* y = */ main_win_height + (box_height * context->index), /* x = */ 0); } @@ -691,6 +1284,13 @@ static int check_resize (pingobj_t *ping) /* {{{ */ break; else if (key == KEY_RESIZE) need_resize = 1; + else if (key == 'g') + { + if (opt_show_graph == 3) + opt_show_graph = 1; + else if (opt_show_graph > 0) + opt_show_graph++; + } } if (need_resize) @@ -705,6 +1305,7 @@ static int pre_loop_hook (pingobj_t *ping) /* {{{ */ int width = 0; int height = 0; int main_win_height; + int box_height = (opt_show_graph == 0) ? 4 : 5; initscr (); cbreak (); @@ -721,11 +1322,14 @@ static int pre_loop_hook (pingobj_t *ping) /* {{{ */ init_pair (OPING_GREEN, COLOR_GREEN, /* default = */ 0); init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0); init_pair (OPING_RED, COLOR_RED, /* default = */ 0); + init_pair (OPING_GREEN_HIST, COLOR_GREEN, COLOR_BLACK); + init_pair (OPING_YELLOW_HIST, COLOR_YELLOW, COLOR_GREEN); + init_pair (OPING_RED_HIST, COLOR_RED, COLOR_YELLOW); } - main_win_height = height - (4 * host_num); + main_win_height = height - (box_height * host_num); main_win = newwin (/* height = */ main_win_height, - /* width = */ 0, + /* width = */ width, /* y = */ 0, /* x = */ 0); /* Allow scrolling */ scrollok (main_win, TRUE); @@ -750,9 +1354,9 @@ static int pre_loop_hook (pingobj_t *ping) /* {{{ */ delwin (context->window); context->window = NULL; } - context->window = newwin (/* height = */ 4, - /* width = */ 0, - /* y = */ main_win_height + (4 * context->index), + context->window = newwin (/* height = */ box_height, + /* width = */ width, + /* y = */ main_win_height + (box_height * context->index), /* x = */ 0); } @@ -818,6 +1422,30 @@ static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */ } /* }}} int post_sleep_hook */ #endif +static void update_context (ping_context_t *ctx, double latency) /* {{{ */ +{ + ctx->req_sent++; + + if (latency > 0.0) + { + ctx->req_rcvd++; + ctx->latency_total += latency; + } + else + { + latency = NAN; + } + + ctx->history_by_time[ctx->history_index] = latency; + + ctx->history_dirty = 1; + + /* Update index and size. */ + ctx->history_index = (ctx->history_index + 1) % HISTORY_SIZE_MAX; + if (ctx->history_size < HISTORY_SIZE_MAX) + ctx->history_size++; +} /* }}} void update_context */ + static void update_host_hook (pingobj_iter_t *iter, /* {{{ */ __attribute__((unused)) int index) { @@ -862,31 +1490,23 @@ static void update_host_hook (pingobj_iter_t *iter, /* {{{ */ # define HOST_PRINTF(...) printf(__VA_ARGS__) #endif - context->req_sent++; + update_context (context, latency); + if (latency > 0.0) { - context->req_rcvd++; - context->latency_total += latency; - context->latency_total_square += (latency * latency); - - if ((context->latency_max < 0.0) || (context->latency_max < latency)) - context->latency_max = latency; - if ((context->latency_min < 0.0) || (context->latency_min > latency)) - context->latency_min = latency; - #if USE_NCURSES if (has_colors () == TRUE) { + double ratio; int color = OPING_GREEN; - double average = context_get_average (context); - double stddev = context_get_stddev (context); - if ((latency < (average - (2 * stddev))) - || (latency > (average + (2 * stddev)))) - color = OPING_RED; - else if ((latency < (average - stddev)) - || (latency > (average + stddev))) + ratio = latency_to_ratio (context, latency); + if (ratio < threshold_green) + color = OPING_GREEN; + else if (ratio < threshold_yellow) color = OPING_YELLOW; + else + color = OPING_RED; HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ", data_len, context->host, context->addr, @@ -920,7 +1540,7 @@ static void update_host_hook (pingobj_iter_t *iter, /* {{{ */ } #endif } - else + else /* if (!(latency > 0.0)) */ { #if USE_NCURSES if (has_colors () == TRUE) @@ -945,14 +1565,18 @@ static void update_host_hook (pingobj_iter_t *iter, /* {{{ */ } #if USE_NCURSES - update_stats_from_context (context); + update_stats_from_context (context, iter); wrefresh (main_win); #endif } /* }}} void update_host_hook */ +/* Prints statistics for each host, cleans up the contexts and returns the + * number of hosts which failed to return more than the fraction + * opt_exit_status_threshold of pings. */ static int post_loop_hook (pingobj_t *ping) /* {{{ */ { pingobj_iter_t *iter; + int failure_count = 0; #if USE_NCURSES endwin (); @@ -972,26 +1596,34 @@ static int post_loop_hook (pingobj_t *ping) /* {{{ */ context_get_packet_loss (context), context->latency_total); - if (context->req_rcvd != 0) { - double average; - double deviation; - - average = context_get_average (context); - deviation = context_get_stddev (context); + double pct_failed = 1.0 - (((double) context->req_rcvd) + / ((double) context->req_sent)); + if (pct_failed > opt_exit_status_threshold) + failure_count++; + } - printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n", - context->latency_min, - average, - context->latency_max, - deviation); + if (context->req_rcvd != 0) + { + double min; + double median; + double max; + double percentile; + + min = percentile_to_latency (context, 0.0); + median = percentile_to_latency (context, 50.0); + max = percentile_to_latency (context, 100.0); + percentile = percentile_to_latency (context, opt_percentile); + + printf ("RTT[ms]: min = %.0f, median = %.0f, p(%.0f) = %.0f, max = %.0f\n", + min, median, opt_percentile, percentile, max); } ping_iterator_set_context (iter, NULL); context_destroy (context); } - return (0); + return (failure_count); } /* }}} int post_loop_hook */ int main (int argc, char **argv) /* {{{ */ @@ -1025,6 +1657,7 @@ int main (int argc, char **argv) /* {{{ */ } #endif + setlocale(LC_ALL, ""); optind = read_options (argc, argv); #if !_POSIX_SAVED_IDS @@ -1199,6 +1832,9 @@ int main (int argc, char **argv) /* {{{ */ exit (EXIT_FAILURE); } + if (host_num == 0) + exit (EXIT_FAILURE); + #if _POSIX_SAVED_IDS saved_set_uid = (uid_t) -1; #endif @@ -1229,7 +1865,12 @@ int main (int argc, char **argv) /* {{{ */ return (1); } - if (ping_send (ping) < 0) + status = ping_send (ping); + if (status == -EINTR) + { + continue; + } + else if (status < 0) { fprintf (stderr, "ping_send failed: %s\n", ping_get_error (ping)); @@ -1262,14 +1903,13 @@ int main (int argc, char **argv) /* {{{ */ /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */ while ((status = nanosleep (&ts_wait, &ts_wait)) != 0) { - if (errno != EINTR) + if (errno == EINTR) { - perror ("nanosleep"); - break; + continue; } - else if (opt_count == 0) + else { - /* sigint */ + perror ("nanosleep"); break; } } @@ -1280,11 +1920,19 @@ int main (int argc, char **argv) /* {{{ */ opt_count--; } /* while (opt_count != 0) */ - post_loop_hook (ping); + /* Returns the number of failed hosts according to -Z. */ + status = post_loop_hook (ping); ping_destroy (ping); - return (0); + if (status == 0) + exit (EXIT_SUCCESS); + else + { + if (status > 255) + status = 255; + exit (status); + } } /* }}} int main */ /* vim: set fdm=marker : */