/* lnstat - Unified linux network statistics
*
* Copyright (C) 2004 by Harald Welte <laforge@gnumonks.org>
*
* Development of this code was funded by Astaro AG, http://www.astaro.com/
*
* Based on original concept and ideas from predecessor rtstat.c:
*
* Copyright 2001 by Robert Olsson <robert.olsson@its.uu.se>
* Uppsala University, Sweden
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
*/
/* Maximum number of fields that can be displayed */
#define MAX_FIELDS 128
/* Maximum number of header lines */
#define HDR_LINES 10
/* default field width if none specified */
#define FIELD_WIDTH_DEFAULT 8
#define FIELD_WIDTH_MAX 20
#define DEFAULT_INTERVAL 2
#define HDR_LINE_LENGTH (MAX_FIELDS*FIELD_WIDTH_MAX)
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <json_writer.h>
#include "lnstat.h"
static struct option opts[] = {
{ "version", 0, NULL, 'V' },
{ "count", 1, NULL, 'c' },
{ "dump", 0, NULL, 'd' },
{ "json", 0, NULL, 'j' },
{ "file", 1, NULL, 'f' },
{ "help", 0, NULL, 'h' },
{ "interval", 1, NULL, 'i' },
{ "keys", 1, NULL, 'k' },
{ "subject", 1, NULL, 's' },
{ "width", 1, NULL, 'w' },
{ "oneline", 0, NULL, 0 },
};
static int usage(char *name, int exit_code)
{
fprintf(stderr, "%s Version %s\n", name, LNSTAT_VERSION);
fprintf(stderr, "Copyright (C) 2004 by Harald Welte <laforge@gnumonks.org>\n");
fprintf(stderr, "This program is free software licensed under GNU GPLv2\nwith ABSOLUTELY NO WARRANTY.\n\n");
fprintf(stderr, "Parameters:\n");
fprintf(stderr, "\t-V --version\t\tPrint Version of Program\n");
fprintf(stderr, "\t-c --count <count>\t"
"Print <count> number of intervals\n");
fprintf(stderr, "\t-d --dump\t\t"
"Dump list of available files/keys\n");
fprintf(stderr, "\t-j --json\t\t"
"Display in JSON format\n");
fprintf(stderr, "\t-f --file <file>\tStatistics file to use\n");
fprintf(stderr, "\t-h --help\t\tThis help message\n");
fprintf(stderr, "\t-i --interval <intv>\t"
"Set interval to 'intv' seconds\n");
fprintf(stderr, "\t-k --keys k,k,k,...\tDisplay only keys specified\n");
fprintf(stderr, "\t-s --subject [0-2]\tControl header printing:\n");
fprintf(stderr, "\t\t\t\t0 = never\n");
fprintf(stderr, "\t\t\t\t1 = once\n");
fprintf(stderr, "\t\t\t\t2 = every 20 lines (default))\n");
fprintf(stderr, "\t-w --width n,n,n,...\tWidth for each field\n");
fprintf(stderr, "\n");
exit(exit_code);
}
struct field_param {
const char *name;
struct lnstat_field *lf;
struct {
unsigned int width;
} print;
};
struct field_params {
unsigned int num;
struct field_param params[MAX_FIELDS];
};
static void print_line(FILE *of, const struct lnstat_file *lnstat_files,
const struct field_params *fp)
{
int i;
for (i = 0; i < fp->num; i++) {
const struct lnstat_field *lf = fp->params[i].lf;
fprintf(of, "%*lu|", fp->params[i].print.width, lf->result);
}
fputc('\n', of);
}
static void print_json(FILE *of, const struct lnstat_file *lnstat_files,
const struct field_params *fp)
{
json_writer_t *jw = jsonw_new(of);
int i;
jsonw_start_object(jw);
for (i = 0; i < fp->num; i++) {
const struct lnstat_field *lf = fp->params[i].lf;
jsonw_uint_field(jw, lf->name, lf->result);
}
jsonw_end_object(jw);
jsonw_destroy(&jw);
}
/* find lnstat_field according to user specification */
static int map_field_params(struct lnstat_file *lnstat_files,
struct field_params *fps, int interval)
{
int i, j = 0;
struct lnstat_file *lf;
/* no field specification on commandline, need to build default */
if (!fps->num) {
for (lf = lnstat_files; lf; lf = lf->next) {
for (i = 0; i < lf->num_fields; i++) {
fps->params[j].lf = &lf->fields[i];
fps->params[j].lf->file->interval.tv_sec =
interval;
if (!fps->params[j].print.width)
fps->params[j].print.width =
FIELD_WIDTH_DEFAULT;
if (++j >= MAX_FIELDS - 1) {
fprintf(stderr,
"WARN: MAX_FIELDS (%d) reached, truncating number of keys\n",
MAX_FIELDS);
goto full;
}
}
}
full:
fps->num = j;
return 1;
}
for (i = 0; i < fps->num; i++) {
fps->params[i].lf = lnstat_find_field(lnstat_files,
fps->params[i].name);
if (!fps->params[i].lf) {
fprintf(stderr, "Field `%s' unknown\n",
fps->params[i].name);
return 0;
}
fps->params[i].lf->file->interval.tv_sec = interval;
if (!fps->params[i].print.width)
fps->params[i].print.width = FIELD_WIDTH_DEFAULT;
}
return 1;
}
struct table_hdr {
int num_lines;
char *hdr[HDR_LINES];
};
static struct table_hdr *build_hdr_string(struct lnstat_file *lnstat_files,
struct field_params *fps,
int linewidth)
{
int h, i;
static struct table_hdr th;
int ofs = 0;
for (i = 0; i < HDR_LINES; i++)
th.hdr[i] = calloc(1, HDR_LINE_LENGTH);
for (i = 0; i < fps->num; i++) {
char *cname, *fname = fps->params[i].lf->name;
unsigned int width = fps->params[i].print.width;
snprintf(th.hdr[0]+ofs, width+2, "%*.*s|", width, width,
fps->params[i].lf->file->basename);
cname = fname;
for (h = 1; h < HDR_LINES; h++) {
if (cname - fname >= strlen(fname))
snprintf(th.hdr[h]+ofs, width+2,
"%*.*s|", width, width, "");
else {
th.num_lines = h+1;
snprintf(th.hdr[h]+ofs, width+2,
"%*.*s|", width, width, cname);
}
cname += width;
}
ofs += width+1;
}
/* fill in spaces */
for (h = 1; h <= th.num_lines; h++) {
for (i = 0; i < ofs; i++) {
if (th.hdr[h][i] == '\0')
th.hdr[h][i] = ' ';
}
}
return &th;
}
static int print_hdr(FILE *of, struct table_hdr *th)
{
int i;
for (i = 0; i < th->num_lines; i++) {
fputs(th->hdr[i], of);
fputc('\n', of);
}
return 0;
}
int main(int argc, char **argv)
{
struct lnstat_file *lnstat_files;
const char *basename;
int i, c;
int interval = DEFAULT_INTERVAL;
int hdr = 2;
enum {
MODE_DUMP,
MODE_JSON,
MODE_NORMAL,
} mode = MODE_NORMAL;
unsigned long count = 0;
struct table_hdr *header;
static struct field_params fp;
int num_req_files = 0;
char *req_files[LNSTAT_MAX_FILES];
/* backwards compatibility mode for old tools */
basename = strrchr(argv[0], '/');
if (basename)
basename += 1; /* name after slash */
else
basename = argv[0]; /* no slash */
if (!strcmp(basename, "rtstat")) {
/* rtstat compatibility mode */
req_files[0] = "rt_cache";
num_req_files = 1;
} else if (!strcmp(basename, "ctstat")) {
/* ctstat compatibility mode */
req_files[0] = "ip_conntrack";
num_req_files = 1;
}
while ((c = getopt_long(argc, argv, "Vc:djpf:h?i:k:s:w:",
opts, NULL)) != -1) {
int len = 0;
char *tmp, *tok;
switch (c) {
case 'c':
count = strtoul(optarg, NULL, 0);
break;
case 'd':
mode = MODE_DUMP;
break;
case 'j':
mode = MODE_JSON;
break;
case 'f':
req_files[num_req_files++] = strdup(optarg);
break;
case '?':
case 'h':
usage(argv[0], 0);
break;
case 'i':
sscanf(optarg, "%u", &interval);
break;
case 'k':
tmp = strdup(optarg);
if (!tmp)
break;
for (tok = strtok(tmp, ",");
tok;
tok = strtok(NULL, ",")) {
if (fp.num >= MAX_FIELDS) {
fprintf(stderr,
"WARN: too many keys requested: (%d max)\n",
MAX_FIELDS);
break;
}
fp.params[fp.num++].name = tok;
}
break;
case 's':
sscanf(optarg, "%u", &hdr);
break;
case 'w':
tmp = strdup(optarg);
if (!tmp)
break;
i = 0;
for (tok = strtok(tmp, ",");
tok;
tok = strtok(NULL, ",")) {
len = strtoul(tok, NULL, 0);
if (len > FIELD_WIDTH_MAX)
len = FIELD_WIDTH_MAX;
fp.params[i].print.width = len;
i++;
}
if (i == 1) {
for (i = 0; i < MAX_FIELDS; i++)
fp.params[i].print.width = len;
}
break;
default:
usage(argv[0], 1);
break;
}
}
lnstat_files = lnstat_scan_dir(PROC_NET_STAT, num_req_files,
(const char **) req_files);
switch (mode) {
case MODE_DUMP:
lnstat_dump(stdout, lnstat_files);
break;
case MODE_NORMAL:
case MODE_JSON:
if (!map_field_params(lnstat_files, &fp, interval))
exit(1);
header = build_hdr_string(lnstat_files, &fp, 80);
if (!header)
exit(1);
if (interval < 1)
interval = 1;
for (i = 0; i < count || !count; i++) {
lnstat_update(lnstat_files);
if (mode == MODE_JSON)
print_json(stdout, lnstat_files, &fp);
else {
if ((hdr > 1 && !(i % 20)) ||
(hdr == 1 && i == 0))
print_hdr(stdout, header);
print_line(stdout, lnstat_files, &fp);
}
fflush(stdout);
if (i < count - 1 || !count)
sleep(interval);
}
break;
}
return 1;
}