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oping.c
1427 lines (1201 loc) · 33 KB
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oping.c
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/**
* Object oriented C module to send ICMP and ICMPv6 `echo's.
* Copyright (C) 2006-2011 Florian octo Forster <ff at octo.it>
*
* 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
* the Free Software Foundation; only version 2 of the License is
* applicable.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#if HAVE_CONFIG_H
# include <config.h>
#endif
#if STDC_HEADERS
# include <stdlib.h>
# include <stdio.h>
# include <string.h>
# include <stdint.h>
# include <inttypes.h>
# include <errno.h>
# include <assert.h>
#else
# error "You don't have the standard C99 header files installed"
#endif /* STDC_HEADERS */
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
#if HAVE_MATH_H
# include <math.h>
#endif
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
#if HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#if HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#if HAVE_NETINET_IP_H
# include <netinet/ip.h>
#endif
#if HAVE_NETDB_H
# include <netdb.h> /* NI_MAXHOST */
#endif
#if HAVE_SIGNAL_H
# include <signal.h>
#endif
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <locale.h>
#if USE_NCURSES
# define NCURSES_OPAQUE 1
/* http://newsgroups.derkeiler.com/Archive/Rec/rec.games.roguelike.development/2010-09/msg00050.html */
# define _X_OPEN_SOURCE_EXTENDED
# include <ncursesw/ncurses.h>
/* some evilness: ncurses knows how to detect unicode, but won't
expose it, yet there's this function that does what we want, so we
steal it away from it */
extern int _nc_unicode_locale(void);
# 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
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
#include "oping.h"
#ifndef _POSIX_SAVED_IDS
# define _POSIX_SAVED_IDS 0
#endif
/* Remove GNU specific __attribute__ settings when using another compiler */
#if !__GNUC__
# define __attribute__(x) /**/
#endif
typedef struct ping_context
{
char host[NI_MAXHOST];
char addr[NI_MAXHOST];
int index;
int req_sent;
int req_rcvd;
double latency_min;
double latency_max;
double latency_total;
double latency_total_square;
#if USE_NCURSES
WINDOW *window;
#endif
} ping_context_t;
static double opt_interval = 1.0;
static int opt_addrfamily = PING_DEF_AF;
static char *opt_srcaddr = NULL;
static char *opt_device = NULL;
static char *opt_filename = NULL;
static int opt_count = -1;
static int opt_send_ttl = 64;
static uint8_t opt_send_qos = 0;
static int host_num = 0;
#if USE_NCURSES
static WINDOW *main_win = NULL;
#endif
static void sigint_handler (int signal) /* {{{ */
{
/* Make compiler happy */
signal = 0;
/* Exit the loop */
opt_count = 0;
} /* }}} void sigint_handler */
static ping_context_t *context_create (void) /* {{{ */
{
ping_context_t *ret;
if ((ret = malloc (sizeof (ping_context_t))) == NULL)
return (NULL);
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;
#endif
return (ret);
} /* }}} ping_context_t *context_create */
static void context_destroy (ping_context_t *context) /* {{{ */
{
if (context == NULL)
return;
#if USE_NCURSES
if (context->window != NULL)
{
delwin (context->window);
context->window = NULL;
}
#endif
free (context);
} /* }}} void context_destroy */
static double context_get_average (ping_context_t *ctx) /* {{{ */
{
double num_total;
if (ctx == NULL)
return (-1.0);
if (ctx->req_rcvd < 1)
return (-0.0);
num_total = (double) ctx->req_rcvd;
return (ctx->latency_total / num_total);
} /* }}} double context_get_average */
static double context_get_stddev (ping_context_t *ctx) /* {{{ */
{
double num_total;
if (ctx == NULL)
return (-1.0);
if (ctx->req_rcvd < 1)
return (-0.0);
else if (ctx->req_rcvd < 2)
return (0.0);
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 */
static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
{
if (ctx == NULL)
return (-1.0);
if (ctx->req_sent < 1)
return (0.0);
return (100.0 * (ctx->req_sent - ctx->req_rcvd)
/ ((double) ctx->req_sent));
} /* }}} double context_get_packet_loss */
static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
{
pingobj_iter_t *iter;
int index;
if (ping == NULL)
return (EINVAL);
index = 0;
for (iter = ping_iterator_get (ping);
iter != NULL;
iter = ping_iterator_next (iter))
{
ping_context_t *context;
size_t buffer_size;
context = context_create ();
context->index = index;
buffer_size = sizeof (context->host);
ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
buffer_size = sizeof (context->addr);
ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
ping_iterator_set_context (iter, (void *) context);
index++;
}
return (0);
} /* }}} int ping_initialize_contexts */
static void usage_exit (const char *name, int status) /* {{{ */
{
fprintf (stderr, "Usage: %s [OPTIONS] "
"-f filename | host [host [host ...]]\n"
"\nAvailable options:\n"
" -4|-6 force the use of IPv4 or IPv6\n"
" -c count number of ICMP packets to send\n"
" -i interval interval with which to send ICMP packets\n"
" -t ttl time to live for each ICMP packet\n"
" -Q qos Quality of Service (QoS) of outgoing packets\n"
" Use \"-Q help\" for a list of valid options.\n"
" -I srcaddr source address\n"
" -D device outgoing interface name\n"
" -f filename filename to read hosts from\n"
"\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
"by Florian octo Forster <octo@verplant.org>\n"
"for contributions see `AUTHORS'\n",
name);
exit (status);
} /* }}} void usage_exit */
__attribute__((noreturn))
static void usage_qos_exit (const char *arg, int status) /* {{{ */
{
if (arg != 0)
fprintf (stderr, "Invalid QoS argument: \"%s\"\n\n", arg);
fprintf (stderr, "Valid QoS arguments (option \"-Q\") are:\n"
"\n"
" Differentiated Services (IPv4 and IPv6, RFC 2474)\n"
"\n"
" be Best Effort (BE, default PHB).\n"
" ef Expedited Forwarding (EF) PHB group (RFC 3246).\n"
" (low delay, low loss, low jitter)\n"
" va Voice Admit (VA) DSCP (RFC 5865).\n"
" (capacity-admitted traffic)\n"
" af[1-4][1-3] Assured Forwarding (AF) PHB group (RFC 2597).\n"
" For example: \"af12\" (class 1, precedence 2)\n"
" cs[0-7] Class Selector (CS) PHB group (RFC 2474).\n"
" For example: \"cs1\" (priority traffic)\n"
"\n"
" Type of Service (IPv4, RFC 1349, obsolete)\n"
"\n"
" lowdelay (%#04x) minimize delay\n"
" throughput (%#04x) maximize throughput\n"
" reliability (%#04x) maximize reliability\n"
" mincost (%#04x) minimize monetary cost\n"
"\n"
" Specify manually\n"
"\n"
" 0x00 - 0xff Hexadecimal numeric specification.\n"
" 0 - 255 Decimal numeric specification.\n"
"\n",
(unsigned int) IPTOS_LOWDELAY,
(unsigned int) IPTOS_THROUGHPUT,
(unsigned int) IPTOS_RELIABILITY,
(unsigned int) IPTOS_MINCOST);
exit (status);
} /* }}} void usage_qos_exit */
static int set_opt_send_qos (const char *opt) /* {{{ */
{
if (opt == NULL)
return (EINVAL);
if (strcasecmp ("help", opt) == 0)
usage_qos_exit (/* arg = */ NULL, /* status = */ EXIT_SUCCESS);
/* DiffServ (RFC 2474): */
/* - Best effort (BE) */
else if (strcasecmp ("be", opt) == 0)
opt_send_qos = 0;
/* - Expedited Forwarding (EF, RFC 3246) */
else if (strcasecmp ("ef", opt) == 0)
opt_send_qos = 0xB8; /* == 0x2E << 2 */
/* - Voice Admit (VA, RFC 5865) */
else if (strcasecmp ("va", opt) == 0)
opt_send_qos = 0xB0; /* == 0x2D << 2 */
/* - Assured Forwarding (AF, RFC 2597) */
else if ((strncasecmp ("af", opt, strlen ("af")) == 0)
&& (strlen (opt) == 4))
{
uint8_t dscp;
uint8_t class = 0;
uint8_t prec = 0;
/* There are four classes, AF1x, AF2x, AF3x, and AF4x. */
if (opt[2] == '1')
class = 1;
else if (opt[2] == '2')
class = 2;
else if (opt[2] == '3')
class = 3;
else if (opt[2] == '4')
class = 4;
else
usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
/* In each class, there are three precedences, AFx1, AFx2, and AFx3 */
if (opt[3] == '1')
prec = 1;
else if (opt[3] == '2')
prec = 2;
else if (opt[3] == '3')
prec = 3;
else
usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
dscp = (8 * class) + (2 * prec);
/* The lower two bits are used for Explicit Congestion Notification (ECN) */
opt_send_qos = dscp << 2;
}
/* - Class Selector (CS) */
else if ((strncasecmp ("cs", opt, strlen ("cs")) == 0)
&& (strlen (opt) == 3))
{
uint8_t class;
if ((opt[2] < '0') || (opt[2] > '7'))
usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
/* Not exactly legal by the C standard, but I don't know of any
* system not supporting this hack. */
class = ((uint8_t) opt[2]) - ((uint8_t) '0');
opt_send_qos = class << 5;
}
/* Type of Service (RFC 1349) */
else if (strcasecmp ("lowdelay", opt) == 0)
opt_send_qos = IPTOS_LOWDELAY;
else if (strcasecmp ("throughput", opt) == 0)
opt_send_qos = IPTOS_THROUGHPUT;
else if (strcasecmp ("reliability", opt) == 0)
opt_send_qos = IPTOS_RELIABILITY;
else if (strcasecmp ("mincost", opt) == 0)
opt_send_qos = IPTOS_MINCOST;
/* Numeric value */
else
{
unsigned long value;
char *endptr;
errno = 0;
endptr = NULL;
value = strtoul (opt, &endptr, /* base = */ 0);
if ((errno != 0) || (endptr == opt)
|| (endptr == NULL) || (*endptr != 0)
|| (value > 0xff))
usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
opt_send_qos = (uint8_t) value;
}
return (0);
} /* }}} int set_opt_send_qos */
static char *format_qos (uint8_t qos, char *buffer, size_t buffer_size) /* {{{ */
{
uint8_t dscp;
uint8_t ecn;
char *dscp_str;
char *ecn_str;
dscp = qos >> 2;
ecn = qos & 0x03;
switch (dscp)
{
case 0x00: dscp_str = "be"; break;
case 0x2e: dscp_str = "ef"; break;
case 0x2d: dscp_str = "va"; break;
case 0x0a: dscp_str = "af11"; break;
case 0x0c: dscp_str = "af12"; break;
case 0x0e: dscp_str = "af13"; break;
case 0x12: dscp_str = "af21"; break;
case 0x14: dscp_str = "af22"; break;
case 0x16: dscp_str = "af23"; break;
case 0x1a: dscp_str = "af31"; break;
case 0x1c: dscp_str = "af32"; break;
case 0x1e: dscp_str = "af33"; break;
case 0x22: dscp_str = "af41"; break;
case 0x24: dscp_str = "af42"; break;
case 0x26: dscp_str = "af43"; break;
case 0x08: dscp_str = "cs1"; break;
case 0x10: dscp_str = "cs2"; break;
case 0x18: dscp_str = "cs3"; break;
case 0x20: dscp_str = "cs4"; break;
case 0x28: dscp_str = "cs5"; break;
case 0x30: dscp_str = "cs6"; break;
case 0x38: dscp_str = "cs7"; break;
default: dscp_str = NULL;
}
switch (ecn)
{
case 0x01: ecn_str = ",ecn(1)"; break;
case 0x02: ecn_str = ",ecn(0)"; break;
case 0x03: ecn_str = ",ce"; break;
default: ecn_str = "";
}
if (dscp_str == NULL)
snprintf (buffer, buffer_size, "0x%02x%s", dscp, ecn_str);
else
snprintf (buffer, buffer_size, "%s%s", dscp_str, ecn_str);
buffer[buffer_size - 1] = 0;
return (buffer);
} /* }}} char *format_qos */
static int read_options (int argc, char **argv) /* {{{ */
{
int optchar;
while (1)
{
optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:");
if (optchar == -1)
break;
switch (optchar)
{
case '4':
case '6':
opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
break;
case 'c':
{
int new_count;
new_count = atoi (optarg);
if (new_count > 0)
opt_count = new_count;
else
fprintf(stderr, "Ignoring invalid count: %s\n",
optarg);
}
break;
case 'f':
{
if (opt_filename != NULL)
free (opt_filename);
opt_filename = strdup (optarg);
}
break;
case 'i':
{
double new_interval;
new_interval = atof (optarg);
if (new_interval < 0.001)
fprintf (stderr, "Ignoring invalid interval: %s\n",
optarg);
else
opt_interval = new_interval;
}
break;
case 'I':
{
if (opt_srcaddr != NULL)
free (opt_srcaddr);
opt_srcaddr = strdup (optarg);
}
break;
case 'D':
opt_device = optarg;
break;
case 't':
{
int new_send_ttl;
new_send_ttl = atoi (optarg);
if ((new_send_ttl > 0) && (new_send_ttl < 256))
opt_send_ttl = new_send_ttl;
else
fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
optarg);
break;
}
case 'Q':
set_opt_send_qos (optarg);
break;
case 'h':
usage_exit (argv[0], 0);
break;
default:
usage_exit (argv[0], 1);
}
}
return (optind);
} /* }}} read_options */
static void time_normalize (struct timespec *ts) /* {{{ */
{
while (ts->tv_nsec < 0)
{
if (ts->tv_sec == 0)
{
ts->tv_nsec = 0;
return;
}
ts->tv_sec -= 1;
ts->tv_nsec += 1000000000;
}
while (ts->tv_nsec >= 1000000000)
{
ts->tv_sec += 1;
ts->tv_nsec -= 1000000000;
}
} /* }}} void time_normalize */
static void time_calc (struct timespec *ts_dest, /* {{{ */
const struct timespec *ts_int,
const struct timeval *tv_begin,
const struct timeval *tv_end)
{
ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
time_normalize (ts_dest);
/* Assure that `(begin + interval) > end'.
* This may seem overly complicated, but `tv_sec' is of type `time_t'
* which may be `unsigned. *sigh* */
if ((tv_end->tv_sec > ts_dest->tv_sec)
|| ((tv_end->tv_sec == ts_dest->tv_sec)
&& ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
{
ts_dest->tv_sec = 0;
ts_dest->tv_nsec = 0;
return;
}
ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
time_normalize (ts_dest);
} /* }}} void time_calc */
#if USE_NCURSES
static int update_prettyping_graph (ping_context_t *ctx, /* {{{ */
double latency, unsigned int sequence)
{
int color = OPING_RED;
char const *symbol = "!";
int symbolc = '!';
size_t hist_symbols_num;
size_t index_symbols;
int x_max;
int x_pos;
x_max = getmaxx (ctx->window);
x_pos = ((sequence - 1) % (x_max - 4)) + 2;
if (_nc_unicode_locale())
{
hist_symbols_num = hist_symbols_utf8_num;
}
else {
hist_symbols_num = hist_symbols_acs_num;
}
if (latency >= 0.0)
{
double ratio;
size_t intensity;
size_t index_colors;
ratio = latency / PING_DEF_TTL;
if (ratio > 1) {
ratio = 1.0;
}
intensity = (size_t) ((ratio * hist_symbols_num
* hist_colors_num) - 1);
index_colors = intensity / hist_symbols_num;
assert (index_colors < hist_colors_num);
index_symbols = intensity % hist_symbols_num;
if (_nc_unicode_locale())
{
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);
wattron (ctx->window, COLOR_PAIR(color));
if (_nc_unicode_locale())
{
mvwprintw (ctx->window,
/* y = */ 3,
/* x = */ x_pos,
symbol);
}
else {
mvwaddch (ctx->window,
/* y = */ 3,
/* x = */ x_pos,
symbolc);
}
wattroff (ctx->window, COLOR_PAIR(color));
/* Use negation here to handle NaN correctly. */
if (!(latency >= 0.0))
wattroff (ctx->window, A_BOLD);
wprintw (ctx->window, " ");
return (0);
} /* }}} int update_prettyping_graph */
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); */
box (ctx->window, 0, 0);
wattron (ctx->window, A_BOLD);
mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
" %s ", ctx->host);
wattroff (ctx->window, A_BOLD);
wprintw (ctx->window, "ping statistics ");
mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
"%i packets transmitted, %i received, %.2f%% packet "
"loss, time %.1fms",
ctx->req_sent, ctx->req_rcvd,
context_get_packet_loss (ctx),
ctx->latency_total);
if (ctx->req_rcvd != 0)
{
double average;
double deviation;
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);
}
if (has_colors () == TRUE)
update_prettyping_graph (ctx, latency, sequence);
wrefresh (ctx->window);
return (0);
} /* }}} int update_stats_from_context */
static int on_resize (pingobj_t *ping) /* {{{ */
{
pingobj_iter_t *iter;
int width = 0;
int height = 0;
int main_win_height;
getmaxyx (stdscr, height, width);
if ((height < 1) || (width < 1))
return (EINVAL);
main_win_height = height - (5 * host_num);
wresize (main_win, main_win_height, /* width = */ width);
/* Allow scrolling */
scrollok (main_win, TRUE);
/* wsetscrreg (main_win, 0, main_win_height - 1); */
/* Allow hardware accelerated scrolling. */
idlok (main_win, TRUE);
wrefresh (main_win);
for (iter = ping_iterator_get (ping);
iter != NULL;
iter = ping_iterator_next (iter))
{
ping_context_t *context;
context = ping_iterator_get_context (iter);
if (context == NULL)
continue;
if (context->window != NULL)
{
delwin (context->window);
context->window = NULL;
}
context->window = newwin (/* height = */ 5,
/* width = */ width,
/* y = */ main_win_height + (5 * context->index),
/* x = */ 0);
}
return (0);
} /* }}} */
static int check_resize (pingobj_t *ping) /* {{{ */
{
int need_resize = 0;
while (42)
{
int key = wgetch (stdscr);
if (key == ERR)
break;
else if (key == KEY_RESIZE)
need_resize = 1;
}
if (need_resize)
return (on_resize (ping));
else
return (0);
} /* }}} int check_resize */
static int pre_loop_hook (pingobj_t *ping) /* {{{ */
{
pingobj_iter_t *iter;
int width = 0;
int height = 0;
int main_win_height;
initscr ();
cbreak ();
noecho ();
nodelay (stdscr, TRUE);
getmaxyx (stdscr, height, width);
if ((height < 1) || (width < 1))
return (EINVAL);
if (has_colors () == TRUE)
{
start_color ();
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 - (5 * host_num);
main_win = newwin (/* height = */ main_win_height,
/* width = */ width,
/* y = */ 0, /* x = */ 0);
/* Allow scrolling */
scrollok (main_win, TRUE);
/* wsetscrreg (main_win, 0, main_win_height - 1); */
/* Allow hardware accelerated scrolling. */
idlok (main_win, TRUE);
wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
wrefresh (main_win);
for (iter = ping_iterator_get (ping);
iter != NULL;
iter = ping_iterator_next (iter))
{
ping_context_t *context;
context = ping_iterator_get_context (iter);
if (context == NULL)
continue;
if (context->window != NULL)
{
delwin (context->window);
context->window = NULL;
}
context->window = newwin (/* height = */ 5,
/* width = */ width,
/* y = */ main_win_height + (5 * context->index),
/* x = */ 0);
}
/* Don't know what good this does exactly, but without this code
* "check_resize" will be called right after startup and *somehow*
* this leads to display errors. If we purge all initial characters
* here, the problem goes away. "wgetch" is non-blocking due to
* "nodelay" (see above). */
while (wgetch (stdscr) != ERR)
{
/* eat up characters */;
}
return (0);
} /* }}} int pre_loop_hook */
static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
{
return (check_resize (ping));
} /* }}} int pre_sleep_hook */
static int post_sleep_hook (pingobj_t *ping) /* {{{ */
{
return (check_resize (ping));
} /* }}} int pre_sleep_hook */
#else /* if !USE_NCURSES */
static int pre_loop_hook (pingobj_t *ping) /* {{{ */
{
pingobj_iter_t *iter;
for (iter = ping_iterator_get (ping);
iter != NULL;
iter = ping_iterator_next (iter))
{
ping_context_t *ctx;
size_t buffer_size;
ctx = ping_iterator_get_context (iter);
if (ctx == NULL)
continue;
buffer_size = 0;
ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
printf ("PING %s (%s) %zu bytes of data.\n",
ctx->host, ctx->addr, buffer_size);
}
return (0);
} /* }}} int pre_loop_hook */
static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
{
fflush (stdout);
return (0);
} /* }}} int pre_sleep_hook */
static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
{
return (0);
} /* }}} int post_sleep_hook */
#endif
static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
__attribute__((unused)) int index)
{
double latency;
unsigned int sequence;
int recv_ttl;
uint8_t recv_qos;
char recv_qos_str[16];
size_t buffer_len;
size_t data_len;
ping_context_t *context;
latency = -1.0;
buffer_len = sizeof (latency);
ping_iterator_get_info (iter, PING_INFO_LATENCY,
&latency, &buffer_len);
sequence = 0;
buffer_len = sizeof (sequence);
ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
&sequence, &buffer_len);
recv_ttl = -1;
buffer_len = sizeof (recv_ttl);
ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
&recv_ttl, &buffer_len);
recv_qos = 0;
buffer_len = sizeof (recv_qos);
ping_iterator_get_info (iter, PING_INFO_RECV_QOS,
&recv_qos, &buffer_len);
data_len = 0;
ping_iterator_get_info (iter, PING_INFO_DATA,
NULL, &data_len);
context = (ping_context_t *) ping_iterator_get_context (iter);
#if USE_NCURSES
# define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
#else
# define HOST_PRINTF(...) printf(__VA_ARGS__)
#endif