summaryrefslogtreecommitdiffstats
path: root/misc/lnstat.c
diff options
context:
space:
mode:
Diffstat (limited to 'misc/lnstat.c')
-rw-r--r--misc/lnstat.c379
1 files changed, 379 insertions, 0 deletions
diff --git a/misc/lnstat.c b/misc/lnstat.c
new file mode 100644
index 0000000..f802a0f
--- /dev/null
+++ b/misc/lnstat.c
@@ -0,0 +1,379 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* 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
+ */
+
+/* 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"
+#include "version.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"
+ "Copyright (C) 2004 by Harald Welte <laforge@gnumonks.org>\n"
+ "This program is free software licensed under GNU GPLv2\nwith ABSOLUTELY NO WARRANTY.\n"
+ "\n"
+ "Parameters:\n"
+ " -V --version Print Version of Program\n"
+ " -c --count <count> "
+ "Print <count> number of intervals\n"
+ " -d --dump "
+ "Dump list of available files/keys\n"
+ " -j --json "
+ "Display in JSON format\n"
+ " -f --file <file> Statistics file to use\n"
+ " -h --help This help message\n"
+ " -i --interval <intv> "
+ "Set interval to 'intv' seconds\n"
+ " -k --keys k,k,k,... Display only keys specified\n"
+ " -s --subject [0-2] Control header printing:\n"
+ " 0 = never\n"
+ " 1 = once\n"
+ " 2 = every 20 lines (default))\n"
+ " -w --width n,n,n,... Width for each field\n"
+ "\n",
+ name, version);
+
+ 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;
+
+ if (jw == NULL) {
+ fprintf(stderr, "Failed to create JSON writer\n");
+ exit(1);
+ }
+ 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;
+ }
+ free(tmp);
+ 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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-03 12:34:21 +0000