1/* lnstat - Unified linux network statistics
2 *
3 * Copyright (C) 2004 by Harald Welte <laforge@gnumonks.org>
4 *
5 * Development of this code was funded by Astaro AG, http://www.astaro.com/
6 *
7 * Based on original concept and ideas from predecessor rtstat.c:
8 *
9 * Copyright 2001 by Robert Olsson <robert.olsson@its.uu.se>
10 *                                 Uppsala University, Sweden
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 */
18
19/* Maximum number of fields that can be displayed */
20#define MAX_FIELDS		128
21
22/* Maximum number of header lines */
23#define HDR_LINES 		10
24
25/* default field width if none specified */
26#define FIELD_WIDTH_DEFAULT	8
27#define FIELD_WIDTH_MAX		20
28
29#define DEFAULT_INTERVAL	2
30
31#define HDR_LINE_LENGTH		(MAX_FIELDS*FIELD_WIDTH_MAX)
32
33#include <unistd.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <string.h>
37#include <getopt.h>
38
39#include "lnstat.h"
40
41static struct option opts[] = {
42	{ "version", 0, NULL, 'V' },
43	{ "count", 1, NULL, 'c' },
44	{ "dump", 1, NULL, 'd' },
45	{ "file", 1, NULL, 'f' },
46	{ "help", 0, NULL, 'h' },
47	{ "interval", 1, NULL, 'i' },
48	{ "keys", 1, NULL, 'k' },
49	{ "subject", 1, NULL, 's' },
50	{ "width", 1, NULL, 'w' },
51};
52
53static int usage(char *name, int exit_code)
54{
55	fprintf(stderr, "%s Version %s\n", name, LNSTAT_VERSION);
56	fprintf(stderr, "Copyright (C) 2004 by Harald Welte "
57			"<laforge@gnumonks.org>\n");
58	fprintf(stderr, "This program is free software licensed under GNU GPLv2"
59			"\nwith ABSOLUTELY NO WARRANTY.\n\n");
60	fprintf(stderr, "Parameters:\n");
61	fprintf(stderr, "\t-V --version\t\tPrint Version of Program\n");
62	fprintf(stderr, "\t-c --count <count>\t"
63			"Print <count> number of intervals\n");
64	fprintf(stderr, "\t-d --dump\t\t"
65			"Dump list of available files/keys\n");
66	fprintf(stderr, "\t-f --file <file>\tStatistics file to use\n");
67	fprintf(stderr, "\t-h --help\t\tThis help message\n");
68	fprintf(stderr, "\t-i --interval <intv>\t"
69			"Set interval to 'intv' seconds\n");
70	fprintf(stderr, "\t-k --keys k,k,k,...\tDisplay only keys specified\n");
71	fprintf(stderr, "\t-s --subject [0-2]\t?\n");
72	fprintf(stderr, "\t-w --width n,n,n,...\tWidth for each field\n");
73	fprintf(stderr, "\n");
74
75	exit(exit_code);
76}
77
78struct field_param {
79	const char *name;
80	struct lnstat_field *lf;
81	struct {
82		unsigned int width;
83	} print;
84};
85
86struct field_params {
87	unsigned int num;
88	struct field_param params[MAX_FIELDS];
89};
90
91static void print_line(FILE *of, const struct lnstat_file *lnstat_files,
92		       const struct field_params *fp)
93{
94	int i;
95
96	for (i = 0; i < fp->num; i++) {
97		struct lnstat_field *lf = fp->params[i].lf;
98		char formatbuf[255];
99
100		snprintf(formatbuf, sizeof(formatbuf)-1, "%%%ulu|",
101			 fp->params[i].print.width);
102		fprintf(of, formatbuf, lf->result);
103	}
104	fputc('\n', of);
105}
106
107/* find lnstat_field according to user specification */
108static int map_field_params(struct lnstat_file *lnstat_files,
109			    struct field_params *fps, int interval)
110{
111	int i, j = 0;
112	struct lnstat_file *lf;
113
114	/* no field specification on commandline, need to build default */
115	if (!fps->num) {
116		for (lf = lnstat_files; lf; lf = lf->next) {
117			for (i = 0; i < lf->num_fields; i++) {
118				fps->params[j].lf = &lf->fields[i];
119				fps->params[j].lf->file->interval.tv_sec =
120								interval;
121				if (!fps->params[j].print.width)
122					fps->params[j].print.width =
123							FIELD_WIDTH_DEFAULT;
124
125				if (++j >= MAX_FIELDS - 1) {
126					fprintf(stderr,
127						"WARN: MAX_FIELDS (%d) reached,"
128						" truncating number of keys\n",
129						MAX_FIELDS);
130					goto full;
131				}
132			}
133		}
134	full:
135		fps->num = j;
136		return 1;
137	}
138
139	for (i = 0; i < fps->num; i++) {
140		fps->params[i].lf = lnstat_find_field(lnstat_files,
141						      fps->params[i].name);
142		if (!fps->params[i].lf) {
143			fprintf(stderr, "Field `%s' unknown\n",
144				fps->params[i].name);
145			return 0;
146		}
147		fps->params[i].lf->file->interval.tv_sec = interval;
148		if (!fps->params[i].print.width)
149			fps->params[i].print.width = FIELD_WIDTH_DEFAULT;
150	}
151	return 1;
152}
153
154struct table_hdr {
155	int num_lines;
156	char *hdr[HDR_LINES];
157};
158
159static struct table_hdr *build_hdr_string(struct lnstat_file *lnstat_files,
160					  struct field_params *fps,
161					  int linewidth)
162{
163	int h,i;
164	static struct table_hdr th;
165	int ofs = 0;
166
167	for (i = 0; i < HDR_LINES; i++) {
168		th.hdr[i] = malloc(HDR_LINE_LENGTH);
169		memset(th.hdr[i], 0, sizeof(th.hdr[i]));
170	}
171
172	for (i = 0; i < fps->num; i++) {
173		char *cname, *fname = fps->params[i].lf->name;
174		char fmt[12];
175		unsigned int width = fps->params[i].print.width;
176
177		snprintf(fmt, sizeof(fmt)-1, "%%%u.%us|", width, width);
178
179		snprintf(th.hdr[0]+ofs, width+2, fmt,
180			 fps->params[i].lf->file->basename);
181
182		cname = fname;
183		for (h = 1; h < HDR_LINES; h++) {
184			if (cname - fname >= strlen(fname))
185				snprintf(th.hdr[h]+ofs, width+2, fmt, "");
186			else {
187				th.num_lines = h+1;
188				snprintf(th.hdr[h]+ofs, width+2, fmt, cname);
189			}
190			cname += width;
191		}
192		ofs += width+1;
193	}
194	/* fill in spaces */
195	for (h = 1; h <= th.num_lines; h++) {
196		for (i = 0; i < ofs; i++) {
197			if (th.hdr[h][i] == '\0')
198				th.hdr[h][i] = ' ';
199		}
200	}
201
202	return &th;
203}
204
205static int print_hdr(FILE *of, struct table_hdr *th)
206{
207	int i;
208
209	for (i = 0; i < th->num_lines; i++) {
210		fputs(th->hdr[i], of);
211		fputc('\n', of);
212	}
213	return 0;
214}
215
216
217int main(int argc, char **argv)
218{
219	struct lnstat_file *lnstat_files;
220	const char *basename;
221	int c;
222	int interval = DEFAULT_INTERVAL;
223	int hdr = 2;
224	enum {
225		MODE_DUMP,
226		MODE_NORMAL,
227	} mode = MODE_NORMAL;
228
229	unsigned long count = 1;
230	static struct field_params fp;
231	int num_req_files = 0;
232	char *req_files[LNSTAT_MAX_FILES];
233
234	/* backwards compatibility mode for old tools */
235	basename = strrchr(argv[0], '/');
236	if (basename)
237		basename += 1;	  /* name after slash */
238	else
239		basename = argv[0]; /* no slash */
240
241	if (!strcmp(basename, "rtstat")) {
242		/* rtstat compatibility mode */
243		req_files[0] = "rt_cache";
244		num_req_files = 1;
245	} else if (!strcmp(basename, "ctstat")) {
246		/* ctstat compatibility mode */
247		req_files[0] = "ip_conntrack";
248		num_req_files = 1;
249	}
250
251	while ((c = getopt_long(argc, argv,"Vc:df:h?i:k:s:w:",
252				opts, NULL)) != -1) {
253		int i, len = 0;
254		char *tmp, *tok;
255
256		switch (c) {
257			case 'c':
258				count = strtoul(optarg, NULL, 0);
259				break;
260			case 'd':
261				mode = MODE_DUMP;
262				break;
263			case 'f':
264				req_files[num_req_files++] = strdup(optarg);
265				break;
266			case '?':
267			case 'h':
268				usage(argv[0], 0);
269				break;
270			case 'i':
271				sscanf(optarg, "%u", &interval);
272				break;
273			case 'k':
274				tmp = strdup(optarg);
275				if (!tmp)
276					break;
277				for (tok = strtok(tmp, ",");
278				     tok;
279				     tok = strtok(NULL, ",")) {
280					if (fp.num >= MAX_FIELDS) {
281						fprintf(stderr,
282							"WARN: too many keys"
283							" requested: (%d max)\n",
284							MAX_FIELDS);
285						break;
286					}
287					fp.params[fp.num++].name = tok;
288				}
289				break;
290			case 's':
291				sscanf(optarg, "%u", &hdr);
292				break;
293			case 'w':
294				tmp = strdup(optarg);
295				if (!tmp)
296					break;
297				i = 0;
298				for (tok = strtok(tmp, ",");
299				     tok;
300				     tok = strtok(NULL, ",")) {
301					len  = strtoul(tok, NULL, 0);
302					if (len > FIELD_WIDTH_MAX)
303						len = FIELD_WIDTH_MAX;
304					fp.params[i].print.width = len;
305					i++;
306				}
307				if (i == 1) {
308					for (i = 0; i < MAX_FIELDS; i++)
309						fp.params[i].print.width = len;
310				}
311				break;
312			default:
313				usage(argv[0], 1);
314				break;
315		}
316	}
317
318	lnstat_files = lnstat_scan_dir(PROC_NET_STAT, num_req_files,
319				       (const char **) req_files);
320
321	switch (mode) {
322		int i;
323		struct table_hdr *header;
324	case MODE_DUMP:
325		lnstat_dump(stderr, lnstat_files);
326		break;
327	case MODE_NORMAL:
328
329		if (!map_field_params(lnstat_files, &fp, interval))
330			exit(1);
331
332		header = build_hdr_string(lnstat_files, &fp, 80);
333		if (!header)
334			exit(1);
335
336		if (interval < 1 )
337			interval=1;
338
339		for (i = 0; i < count; i++) {
340			if  ((hdr > 1 && (! (i % 20))) || (hdr == 1 && i == 0))
341				print_hdr(stdout, header);
342			lnstat_update(lnstat_files);
343			print_line(stdout, lnstat_files, &fp);
344			fflush(stdout);
345			sleep(interval);
346		}
347	}
348
349	return 1;
350}
351
352