X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Foping.c;h=d84219eadad61d1b18f8a0bb392000c61d70d559;hb=66464b61f8ee756dcfc0081944f4367da2b1a6ab;hp=bc606e5f37c7396ec3bfdcf61bc039dfe9432954;hpb=ffb25235ced56654a96fa29f50f583cc15748fc8;p=liboping.git diff --git a/src/oping.c b/src/oping.c index bc606e5..d84219e 100644 --- a/src/oping.c +++ b/src/oping.c @@ -25,6 +25,8 @@ # include # include # include +# include +# include # include # include #else @@ -50,6 +52,16 @@ # endif #endif +#if HAVE_SYS_SOCKET_H +# include +#endif +#if HAVE_NETINET_IN_H +# include +#endif +#if HAVE_NETINET_IP_H +# include +#endif + #if HAVE_NETDB_H # include /* NI_MAXHOST */ #endif @@ -63,6 +75,7 @@ #endif #if USE_NCURSES +# define NCURSES_OPAQUE 1 # include # define OPING_GREEN 1 @@ -81,6 +94,7 @@ typedef struct ping_context char host[NI_MAXHOST]; char addr[NI_MAXHOST]; + int index; int req_sent; int req_rcvd; @@ -101,6 +115,9 @@ 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; @@ -114,7 +131,7 @@ static void sigint_handler (int signal) /* {{{ */ opt_count = 0; } /* }}} void sigint_handler */ -static ping_context_t *context_create (void) +static ping_context_t *context_create (void) /* {{{ */ { ping_context_t *ret; @@ -133,9 +150,9 @@ static ping_context_t *context_create (void) #endif return (ret); -} +} /* }}} ping_context_t *context_create */ -static void context_destroy (ping_context_t *context) +static void context_destroy (ping_context_t *context) /* {{{ */ { if (context == NULL) return; @@ -149,7 +166,7 @@ static void context_destroy (ping_context_t *context) #endif free (context); -} +} /* }}} void context_destroy */ static double context_get_average (ping_context_t *ctx) /* {{{ */ { @@ -195,7 +212,40 @@ static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */ / ((double) ctx->req_sent)); } /* }}} double context_get_packet_loss */ -static void usage_exit (const char *name, int status) +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) /* {{{ */ { int name_length; @@ -209,6 +259,8 @@ static void usage_exit (const char *name, int status) " -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" @@ -218,7 +270,188 @@ static void usage_exit (const char *name, int status) "for contributions see `AUTHORS'\n", name); exit (status); -} +} /* }}} void usage_exit */ + +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" + " 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 */ + /* - Assured Forwarding (AF, RFC 2597) */ + else if ((strncasecmp ("af", opt, strlen ("af")) == 0) + && (strlen (opt) == 4)) + { + uint8_t dscp; + uint8_t class; + uint8_t prec; + + /* 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 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) /* {{{ */ { @@ -226,7 +459,7 @@ static int read_options (int argc, char **argv) /* {{{ */ while (1) { - optchar = getopt (argc, argv, "46c:hi:I:t:f:D:"); + optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:"); if (optchar == -1) break; @@ -293,6 +526,10 @@ static int read_options (int argc, char **argv) /* {{{ */ break; } + case 'Q': + set_opt_send_qos (optarg); + break; + case 'h': usage_exit (argv[0], 0); break; @@ -352,21 +589,12 @@ static void time_calc (struct timespec *ts_dest, /* {{{ */ } /* }}} void time_calc */ #if USE_NCURSES -static int context_window_repaint (ping_context_t *ctx, /* {{{ */ - int index) +static int update_stats_from_context (ping_context_t *ctx) /* {{{ */ { - if (ctx == NULL) + if ((ctx == NULL) || (ctx->window == NULL)) return (EINVAL); - if (ctx->window == NULL) - { - ctx->window = newwin (/* height = */ 4, /* width = */ 0, - /* start y = */ 4 * index, /* start x = */ 0); - } - else /* if (ctx->window != NULL) */ - { - werase (ctx->window); - } + werase (ctx->window); box (ctx->window, 0, 0); wattron (ctx->window, A_BOLD); @@ -399,14 +627,54 @@ static int context_window_repaint (ping_context_t *ctx, /* {{{ */ wrefresh (ctx->window); return (0); -} /* }}} int context_window_repaint */ +} /* }}} int update_stats_from_context */ -static int resize_windows (pingobj_t *ping) /* {{{ */ +static int on_resize (pingobj_t *ping) /* {{{ */ { - int index; 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 - (4 * 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 = */ 4, + /* width = */ 0, + /* y = */ main_win_height + (4 * context->index), + /* x = */ 0); + } + + return (0); +} /* }}} */ + +static int check_resize (pingobj_t *ping) /* {{{ */ +{ int need_resize = 0; while (42) @@ -418,50 +686,139 @@ static int resize_windows (pingobj_t *ping) /* {{{ */ need_resize = 1; } - if (!need_resize) + 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); - index = 0; + 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); + } + + main_win_height = height - (4 * host_num); + main_win = newwin (/* height = */ main_win_height, + /* width = */ 0, + /* 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 *ctx = ping_iterator_get_context (iter); + ping_context_t *context; - if (ctx->window == NULL) - { - index++; + context = ping_iterator_get_context (iter); + if (context == NULL) continue; + + if (context->window != NULL) + { + delwin (context->window); + context->window = NULL; } + context->window = newwin (/* height = */ 4, + /* width = */ 0, + /* y = */ main_win_height + (4 * context->index), + /* x = */ 0); + } - wresize (ctx->window, 4, width); - context_window_repaint (ctx, index); - index++; + /* 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 */; } - if (main_win != NULL) + 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)) { - wresize (main_win, height - (4 * index), width); - /* touchwin (main_win); */ - /* wrefresh (main_win); */ - clearok (main_win, TRUE); + 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 resize_windows */ +} /* }}} 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 print_host (pingobj_iter_t *iter, /* {{{ */ +static void update_host_hook (pingobj_iter_t *iter, /* {{{ */ 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; @@ -481,6 +838,11 @@ static void print_host (pingobj_iter_t *iter, /* {{{ */ 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); @@ -519,10 +881,16 @@ static void print_host (pingobj_iter_t *iter, /* {{{ */ || (latency > (average + stddev))) color = OPING_YELLOW; - HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i " - "time=", + HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ", data_len, context->host, context->addr, - sequence, recv_ttl); + sequence, recv_ttl, + format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str))); + if ((recv_qos != 0) || (opt_send_qos != 0)) + { + HOST_PRINTF ("qos=%s ", + format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str))); + } + HOST_PRINTF ("time="); wattron (main_win, COLOR_PAIR(color)); HOST_PRINTF ("%.2f", latency); wattroff (main_win, COLOR_PAIR(color)); @@ -531,11 +899,16 @@ static void print_host (pingobj_iter_t *iter, /* {{{ */ else { #endif - HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i " - "time=%.2f ms\n", + HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ", data_len, context->host, context->addr, - sequence, recv_ttl, latency); + sequence, recv_ttl); + if ((recv_qos != 0) || (opt_send_qos != 0)) + { + HOST_PRINTF ("qos=%s ", + format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str))); + } + HOST_PRINTF ("time=%.2f ms\n", latency); #if USE_NCURSES } #endif @@ -565,85 +938,12 @@ static void print_host (pingobj_iter_t *iter, /* {{{ */ } #if USE_NCURSES - context_window_repaint (context, index); + update_stats_from_context (context); wrefresh (main_win); #endif -} /* }}} void print_host */ +} /* }}} void update_host_hook */ -static int print_header (pingobj_t *ping) /* {{{ */ -{ - pingobj_iter_t *iter; - int index; - -#if USE_NCURSES - initscr (); - cbreak (); - noecho (); - nodelay (stdscr, TRUE); - - 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); - } -#endif - - 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 (); - - 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); - - buffer_size = 0; - ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size); - -#if USE_NCURSES - context_window_repaint (context, index); -#else /* !USE_NCURSES */ - printf ("PING %s (%s) %zu bytes of data.\n", - context->host, context->addr, buffer_size); -#endif - - ping_iterator_set_context (iter, (void *) context); - - index++; - } - -#if USE_NCURSES - main_win = newwin (/* height = */ 0, /* width = */ 0, - /* y = */ 4 * index, /* x = */ 0); - /* Allow scrolling */ - scrollok (main_win, TRUE); - /* Allow hardware accelerated scrolling. */ - idlok (main_win, TRUE); - - /* Don't know what good this does exactly, but without this code - * "resize_windows" 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 */; - } -#endif - - return (0); -} /* }}} int print_header */ - -static int print_footer (pingobj_t *ping) /* {{{ */ +static int post_loop_hook (pingobj_t *ping) /* {{{ */ { pingobj_iter_t *iter; @@ -685,7 +985,7 @@ static int print_footer (pingobj_t *ping) /* {{{ */ } return (0); -} /* }}} int print_footer */ +} /* }}} int post_loop_hook */ int main (int argc, char **argv) /* {{{ */ { @@ -751,6 +1051,12 @@ int main (int argc, char **argv) /* {{{ */ opt_send_ttl, ping_get_error (ping)); } + if (ping_setopt (ping, PING_OPT_QOS, &opt_send_qos) != 0) + { + fprintf (stderr, "Setting TOS to %i failed: %s\n", + opt_send_qos, ping_get_error (ping)); + } + { double temp_sec; double temp_nsec; @@ -831,6 +1137,10 @@ int main (int argc, char **argv) /* {{{ */ fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg); continue; } + else + { + host_num++; + } } #if _POSIX_SAVED_IDS @@ -867,6 +1177,10 @@ int main (int argc, char **argv) /* {{{ */ fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg); continue; } + else + { + host_num++; + } } /* Permanently drop root privileges if we're setuid-root. */ @@ -882,7 +1196,7 @@ int main (int argc, char **argv) /* {{{ */ saved_set_uid = (uid_t) -1; #endif - print_header (ping); + ping_initialize_contexts (ping); if (i == 0) return (1); @@ -895,6 +1209,8 @@ int main (int argc, char **argv) /* {{{ */ return (1); } + pre_loop_hook (ping); + while (opt_count != 0) { int index; @@ -918,12 +1234,11 @@ int main (int argc, char **argv) /* {{{ */ iter != NULL; iter = ping_iterator_next (iter)) { - print_host (iter, index); + update_host_hook (iter, index); index++; } -#if !USE_NCURSES - fflush (stdout); -#endif + + pre_sleep_hook (ping); /* Don't sleep in the last iteration */ if (opt_count == 1) @@ -950,21 +1265,15 @@ int main (int argc, char **argv) /* {{{ */ /* sigint */ break; } - -#if USE_NCURSES - resize_windows (ping); -#endif } -#if USE_NCURSES - resize_windows (ping); -#endif + post_sleep_hook (ping); if (opt_count > 0) opt_count--; } /* while (opt_count != 0) */ - print_footer (ping); + post_loop_hook (ping); ping_destroy (ping);