| /* 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" |
| "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, LNSTAT_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; |
| |
| 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; |
| } |