X-Git-Url: http://git.onelab.eu/?p=iproute2.git;a=blobdiff_plain;f=misc%2Fnstat.c;fp=misc%2Fnstat.c;h=0000000000000000000000000000000000000000;hp=fc4b03bd66bb10f329eb38db77e3cbeba6ab585f;hb=3331a68859fd71047bb1f309048960b48eab2d83;hpb=2bd4a72f2100be7ad7d9518cb1d49bb2a5b71994

diff --git a/misc/nstat.c b/misc/nstat.c
deleted file mode 100644
index fc4b03b..0000000
--- a/misc/nstat.c
+++ /dev/null
@@ -1,621 +0,0 @@
-/*
- * nstat.c	handy utility to read counters /proc/net/netstat and snmp
- *
- *		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.
- *
- * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <string.h>
-#include <errno.h>
-#include <time.h>
-#include <sys/time.h>
-#include <fnmatch.h>
-#include <sys/file.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <sys/poll.h>
-#include <sys/wait.h>
-#include <sys/stat.h>
-#include <signal.h>
-#include <math.h>
-
-#include <SNAPSHOT.h>
-
-int dump_zeros = 0;
-int reset_history = 0;
-int ignore_history = 0;
-int no_output = 0;
-int no_update = 0;
-int scan_interval = 0;
-int time_constant = 0;
-double W;
-char **patterns;
-int npatterns;
-
-char info_source[128];
-int source_mismatch;
-
-int generic_proc_open(char *env, char *name)
-{
-	char store[128];
-	char *p = getenv(env);
-	if (!p) {
-		p = getenv("PROC_ROOT") ? : "/proc";
-		snprintf(store, sizeof(store)-1, "%s/%s", p, name);
-		p = store;
-	}
-	return open(store, O_RDONLY);
-}
-
-int net_netstat_open(void)
-{
-	return generic_proc_open("PROC_NET_NETSTAT", "net/netstat");
-}
-
-int net_snmp_open(void)
-{
-	return generic_proc_open("PROC_NET_SNMP", "net/snmp");
-}
-
-int net_snmp6_open(void)
-{
-	return generic_proc_open("PROC_NET_SNMP6", "net/snmp6");
-}
-
-struct nstat_ent
-{
-	struct nstat_ent *next;
-	char		 *id;
-	unsigned long long val;
-	unsigned long	   ival;
-	double		   rate;
-};
-
-struct nstat_ent *kern_db;
-struct nstat_ent *hist_db;
-
-char *useless_numbers[] = {
-"IpForwarding", "IpDefaultTTL",
-"TcpRtoAlgorithm", "TcpRtoMin", "TcpRtoMax",
-"TcpMaxConn", "TcpCurrEstab"
-};
-
-int useless_number(char *id)
-{
-	int i;
-	for (i=0; i<sizeof(useless_numbers)/sizeof(*useless_numbers); i++)
-		if (strcmp(id, useless_numbers[i]) == 0)
-			return 1;
-	return 0;
-}
-
-int match(char *id)
-{
-	int i;
-
-	if (npatterns == 0)
-		return 1;
-
-	for (i=0; i<npatterns; i++) {
-		if (!fnmatch(patterns[i], id, 0))
-			return 1;
-	}
-	return 0;
-}
-
-void load_good_table(FILE *fp)
-{
-	char buf[4096];
-	struct nstat_ent *db = NULL;
-	struct nstat_ent *n;
-
-	while (fgets(buf, sizeof(buf), fp) != NULL) {
-		int nr;
-		unsigned long long val;
-		double rate;
-		char idbuf[sizeof(buf)];
-		if (buf[0] == '#') {
-			buf[strlen(buf)-1] = 0;
-			if (info_source[0] && strcmp(info_source, buf+1))
-				source_mismatch = 1;
-			info_source[0] = 0;
-			strncat(info_source, buf+1, sizeof(info_source)-1);
-			continue;
-		}
-		/* idbuf is as big as buf, so this is safe */
-		nr = sscanf(buf, "%s%llu%lg", idbuf, &val, &rate);
-		if (nr < 2)
-			abort();
-		if (nr < 3)
-			rate = 0;
-		if (useless_number(idbuf))
-			continue;
-		if ((n = malloc(sizeof(*n))) == NULL)
-			abort();
-		n->id = strdup(idbuf);
-		n->ival = (unsigned long)val;
-		n->val = val;
-		n->rate = rate;
-		n->next = db;
-		db = n;
-	}
-
-	while (db) {
-		n = db;
-		db = db->next;
-		n->next = kern_db;
-		kern_db = n;
-	}
-}
-
-
-void load_ugly_table(FILE *fp)
-{
-	char buf[4096];
-	struct nstat_ent *db = NULL;
-	struct nstat_ent *n;
-
-	while (fgets(buf, sizeof(buf), fp) != NULL) {
-		char idbuf[sizeof(buf)];
-		int  off;
-		char *p;
-
-		p = strchr(buf, ':');
-		if (!p)
-			abort();
-		*p = 0;
-		idbuf[0] = 0;
-		strncat(idbuf, buf, sizeof(idbuf) - 1);
-		off = p - buf;
-		p += 2;
-
-		while (*p) {
-			char *next;
-			if ((next = strchr(p, ' ')) != NULL)
-				*next++ = 0;
-			else if ((next = strchr(p, '\n')) != NULL)
-				*next++ = 0;
-			if (off < sizeof(idbuf)) {
-				idbuf[off] = 0;
-				strncat(idbuf, p, sizeof(idbuf) - off - 1);
-			}
-			n = malloc(sizeof(*n));
-			if (!n)
-				abort();
-			n->id = strdup(idbuf);
-			n->rate = 0;
-			n->next = db;
-			db = n;
-			p = next;
-		}
-		n = db;
-		if (fgets(buf, sizeof(buf), fp) == NULL)
-			abort();
-		do {
-			p = strrchr(buf, ' ');
-			if (!p)
-				abort();
-			*p = 0;
-			if (sscanf(p+1, "%lu", &n->ival) != 1)
-				abort();
-			n->val = n->ival;
-			/* Trick to skip "dummy" trailing ICMP MIB in 2.4 */
-			if (strcmp(idbuf, "IcmpOutAddrMaskReps") == 0)
-				idbuf[5] = 0;
-			else
-				n = n->next;
-		} while (p > buf + off + 2);
-	}
-
-	while (db) {
-		n = db;
-		db = db->next;
-		if (useless_number(n->id)) {
-			free(n->id);
-			free(n);
-		} else {
-			n->next = kern_db;
-			kern_db = n;
-		}
-	}
-}
-
-void load_snmp(void)
-{
-	FILE *fp = fdopen(net_snmp_open(), "r");
-	if (fp) {
-		load_ugly_table(fp);
-		fclose(fp);
-	}
-}
-
-void load_snmp6(void)
-{
-	FILE *fp = fdopen(net_snmp6_open(), "r");
-	if (fp) {
-		load_good_table(fp);
-		fclose(fp);
-	}
-}
-
-void load_netstat(void)
-{
-	FILE *fp = fdopen(net_netstat_open(), "r");
-	if (fp) {
-		load_ugly_table(fp);
-		fclose(fp);
-	}
-}
-
-void dump_kern_db(FILE *fp, int to_hist)
-{
-	struct nstat_ent *n, *h;
-	h = hist_db;
-	fprintf(fp, "#%s\n", info_source);
-	for (n=kern_db; n; n=n->next) {
-		unsigned long long val = n->val;
-		if (!dump_zeros && !val && !n->rate)
-			continue;
-		if (!match(n->id)) {
-			struct nstat_ent *h1;
-			if (!to_hist)
-				continue;
-			for (h1 = h; h1; h1 = h1->next) {
-				if (strcmp(h1->id, n->id) == 0) {
-					val = h1->val;
-					h = h1->next;
-					break;
-				}
-			}
-		}
-		fprintf(fp, "%-32s%-16llu%6.1f\n", n->id, val, n->rate);
-	}
-}
-
-void dump_incr_db(FILE *fp)
-{
-	struct nstat_ent *n, *h;
-	h = hist_db;
-	fprintf(fp, "#%s\n", info_source);
-	for (n=kern_db; n; n=n->next) {
-		int ovfl = 0;
-		unsigned long long val = n->val;
-		struct nstat_ent *h1;
-		for (h1 = h; h1; h1 = h1->next) {
-			if (strcmp(h1->id, n->id) == 0) {
-				if (val < h1->val) {
-					ovfl = 1;
-					val = h1->val;
-				}
-				val -= h1->val;
-				h = h1->next;
-				break;
-			}
-		}
-		if (!dump_zeros && !val && !n->rate)
-			continue;
-		if (!match(n->id))
-			continue;
-		fprintf(fp, "%-32s%-16llu%6.1f%s\n", n->id, val,
-			n->rate, ovfl?" (overflow)":"");
-	}
-}
-
-static int children;
-
-void sigchild(int signo)
-{
-}
-
-void update_db(int interval)
-{
-	struct nstat_ent *n, *h;
-
-	n = kern_db;
-	kern_db = NULL;
-
-	load_netstat();
-	load_snmp6();
-	load_snmp();
-
-	h = kern_db;
-	kern_db = n;
-
-	for (n = kern_db; n; n = n->next) {
-		struct nstat_ent *h1;
-		for (h1 = h; h1; h1 = h1->next) {
-			if (strcmp(h1->id, n->id) == 0) {
-				double sample;
-				unsigned long incr = h1->ival - n->ival;
-				n->val += incr;
-				n->ival = h1->ival;
-				sample = (double)(incr*1000)/interval;
-				if (interval >= scan_interval) {
-					n->rate += W*(sample-n->rate);
-				} else if (interval >= 1000) {
-					if (interval >= time_constant) {
-						n->rate = sample;
-					} else {
-						double w = W*(double)interval/scan_interval;
-						n->rate += w*(sample-n->rate);
-					}
-				}
-
-				while (h != h1) {
-					struct nstat_ent *tmp = h;
-					h = h->next;
-					free(tmp->id);
-					free(tmp);
-				};
-				h = h1->next;
-				free(h1->id);
-				free(h1);
-				break;
-			}
-		}
-	}
-}
-
-#define T_DIFF(a,b) (((a).tv_sec-(b).tv_sec)*1000 + ((a).tv_usec-(b).tv_usec)/1000)
-
-
-void server_loop(int fd)
-{
-	struct timeval snaptime = { 0 };
-	struct pollfd p;
-	p.fd = fd;
-	p.events = p.revents = POLLIN;
-	
-	sprintf(info_source, "%d.%lu sampling_interval=%d time_const=%d",
-		getpid(), (unsigned long)random(), scan_interval/1000, time_constant/1000);
-
-	load_netstat();
-	load_snmp6();
-	load_snmp();
-
-	for (;;) {
-		int status;
-		int tdiff;
-		struct timeval now;
-		gettimeofday(&now, NULL);
-		tdiff = T_DIFF(now, snaptime);
-		if (tdiff >= scan_interval) {
-			update_db(tdiff);
-			snaptime = now;
-			tdiff = 0;
-		}
-		if (poll(&p, 1, tdiff + scan_interval) > 0
-		    && (p.revents&POLLIN)) {
-			int clnt = accept(fd, NULL, NULL);
-			if (clnt >= 0) {
-				pid_t pid;
-				if (children >= 5) {
-					close(clnt);
-				} else if ((pid = fork()) != 0) {
-					if (pid>0)
-						children++;
-					close(clnt);
-				} else {
-					FILE *fp = fdopen(clnt, "w");
-					if (fp) {
-						if (tdiff > 0)
-							update_db(tdiff);
-						dump_kern_db(fp, 0);
-					}
-					exit(0);
-				}
-			}
-		}
-		while (children && waitpid(-1, &status, WNOHANG) > 0)
-			children--;
-	}
-}
-
-int verify_forging(int fd)
-{
-	struct ucred cred;
-	socklen_t olen = sizeof(cred);
-
-	if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, (void*)&cred, &olen) ||
-	    olen < sizeof(cred))
-		return -1;
-	if (cred.uid == getuid() || cred.uid == 0)
-		return 0;
-	return -1;
-}
-
-static void usage(void) __attribute__((noreturn));
-
-static void usage(void)
-{
-	fprintf(stderr,
-"Usage: nstat [ -h?vVzrnasd:t: ] [ PATTERN [ PATTERN ] ]\n"
-		);
-	exit(-1);
-}
-
-
-int main(int argc, char *argv[])
-{
-	char hist_name[128];
-	struct sockaddr_un sun;
-	FILE *hist_fp = NULL;
-	int ch;
-	int fd;
-
-	while ((ch = getopt(argc, argv, "h?vVzrnasd:t:")) != EOF) {
-		switch(ch) {
-		case 'z':
-			dump_zeros = 1;
-			break;
-		case 'r':
-			reset_history = 1;
-			break;
-		case 'a':
-			ignore_history = 1;
-			break;
-		case 's':
-			no_update = 1;
-			break;
-		case 'n':
-			no_output = 1;
-			break;
-		case 'd':
-			scan_interval = 1000*atoi(optarg);
-			break;
-		case 't':
-			if (sscanf(optarg, "%d", &time_constant) != 1 ||
-			    time_constant <= 0) {
-				fprintf(stderr, "nstat: invalid time constant divisor\n");
-				exit(-1);
-			}
-			break;
-		case 'v':
-		case 'V':
-			printf("nstat utility, iproute2-ss%s\n", SNAPSHOT);
-			exit(0);
-		case 'h':
-		case '?':
-		default:
-			usage();
-		}
-	}
-
-	argc -= optind;
-	argv += optind;
-
-	sun.sun_family = AF_UNIX;
-	sun.sun_path[0] = 0;
-	sprintf(sun.sun_path+1, "nstat%d", getuid());
-
-	if (scan_interval > 0) {
-		if (time_constant == 0)
-			time_constant = 60;
-		time_constant *= 1000;
-		W = 1 - 1/exp(log(10)*(double)scan_interval/time_constant);
-		if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
-			perror("nstat: socket");
-			exit(-1);
-		}
-		if (bind(fd, (struct sockaddr*)&sun, 2+1+strlen(sun.sun_path+1)) < 0) {
-			perror("nstat: bind");
-			exit(-1);
-		}
-		if (listen(fd, 5) < 0) {
-			perror("nstat: listen");
-			exit(-1);
-		}
-		if (fork())
-			exit(0);
-		chdir("/");
-		close(0); close(1); close(2); setsid();
-		signal(SIGPIPE, SIG_IGN);
-		signal(SIGCHLD, sigchild);
-		server_loop(fd);
-		exit(0);
-	}
-
-	patterns = argv;
-	npatterns = argc;
-
-	if (getenv("NSTAT_HISTORY"))
-		snprintf(hist_name, sizeof(hist_name), getenv("NSTAT_HISTORY"));
-	else
-		sprintf(hist_name, "/tmp/.nstat.u%d", getuid());
-
-	if (reset_history)
-		unlink(hist_name);
-
-	if (!ignore_history || !no_update) {
-		struct stat stb;
-
-		fd = open(hist_name, O_RDWR|O_CREAT|O_NOFOLLOW, 0600);
-		if (fd < 0) {
-			perror("nstat: open history file");
-			exit(-1);
-		}
-		if ((hist_fp = fdopen(fd, "r+")) == NULL) {
-			perror("nstat: fdopen history file");
-			exit(-1);
-		}
-		if (flock(fileno(hist_fp), LOCK_EX)) {
-			perror("nstat: flock history file");
-			exit(-1);
-		}
-		if (fstat(fileno(hist_fp), &stb) != 0) {
-			perror("nstat: fstat history file");
-			exit(-1);
-		}
-		if (stb.st_nlink != 1 || stb.st_uid != getuid()) {
-			fprintf(stderr, "nstat: something is so wrong with history file, that I prefer not to proceed.\n");
-			exit(-1);
-		}
-		if (!ignore_history) {
-			FILE *tfp;
-			long uptime;
-			if ((tfp = fopen("/proc/uptime", "r")) != NULL) {
-				if (fscanf(tfp, "%ld", &uptime) != 1)
-					uptime = -1;
-				fclose(tfp);
-			}
-			if (uptime >= 0 && time(NULL) >= stb.st_mtime+uptime) {
-				fprintf(stderr, "nstat: history is aged out, resetting\n");
-				ftruncate(fileno(hist_fp), 0);
-			}
-		}
-
-		load_good_table(hist_fp);
-
-		hist_db = kern_db;
-		kern_db = NULL;
-	}
-
-	if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) >= 0 &&
-	    (connect(fd, (struct sockaddr*)&sun, 2+1+strlen(sun.sun_path+1)) == 0
-	     || (strcpy(sun.sun_path+1, "nstat0"),
-		 connect(fd, (struct sockaddr*)&sun, 2+1+strlen(sun.sun_path+1)) == 0))
-	    && verify_forging(fd) == 0) {
-		FILE *sfp = fdopen(fd, "r");
-		load_good_table(sfp);
-		if (hist_db && source_mismatch) {
-			fprintf(stderr, "nstat: history is stale, ignoring it.\n");
-			hist_db = NULL;
-		}
-		fclose(sfp);
-	} else {
-		if (fd >= 0)
-			close(fd);
-		if (hist_db && info_source[0] && strcmp(info_source, "kernel")) {
-			fprintf(stderr, "nstat: history is stale, ignoring it.\n");
-			hist_db = NULL;
-			info_source[0] = 0;
-		}
-		load_netstat();
-		load_snmp6();
-		load_snmp();
-		if (info_source[0] == 0)
-			strcpy(info_source, "kernel");
-	}
-
-	if (!no_output) {
-		if (ignore_history || hist_db == NULL)
-			dump_kern_db(stdout, 0);
-		else
-			dump_incr_db(stdout);
-	}
-	if (!no_update) {
-		ftruncate(fileno(hist_fp), 0);
-		rewind(hist_fp);
-		dump_kern_db(hist_fp, 1);
-		fflush(hist_fp);
-	}
-	exit(0);
-}