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/*
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* nstat.c handy utility to read counters /proc/net/netstat and snmp
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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#include <errno.h>
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#include <time.h>
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#include <sys/time.h>
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#include <fnmatch.h>
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#include <sys/file.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <sys/poll.h>
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#include <sys/wait.h>
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#include <sys/stat.h>
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#include <signal.h>
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#include <math.h>
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#include <getopt.h>
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#include <json_writer.h>
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#include "version.h"
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#include "utils.h"
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int dump_zeros;
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int reset_history;
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int ignore_history;
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int no_output;
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int json_output;
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int no_update;
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int scan_interval;
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int time_constant;
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double W;
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char **patterns;
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int npatterns;
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char info_source[128];
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int source_mismatch;
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static int generic_proc_open(const char *env, char *name)
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{
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char store[128];
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char *p = getenv(env);
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if (!p) {
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p = getenv("PROC_ROOT") ? : "/proc";
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snprintf(store, sizeof(store)-1, "%s/%s", p, name);
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p = store;
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}
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return open(p, O_RDONLY);
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}
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static int net_netstat_open(void)
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{
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return generic_proc_open("PROC_NET_NETSTAT", "net/netstat");
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}
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static int net_snmp_open(void)
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{
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return generic_proc_open("PROC_NET_SNMP", "net/snmp");
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}
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static int net_snmp6_open(void)
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{
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return generic_proc_open("PROC_NET_SNMP6", "net/snmp6");
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}
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static int net_sctp_snmp_open(void)
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{
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return generic_proc_open("PROC_NET_SCTP_SNMP", "net/sctp/snmp");
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}
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struct nstat_ent {
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struct nstat_ent *next;
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char *id;
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unsigned long long val;
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double rate;
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};
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struct nstat_ent *kern_db;
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struct nstat_ent *hist_db;
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static const char *useless_numbers[] = {
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"IpForwarding", "IpDefaultTTL",
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"TcpRtoAlgorithm", "TcpRtoMin", "TcpRtoMax",
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"TcpMaxConn", "TcpCurrEstab"
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};
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static int useless_number(const char *id)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(useless_numbers); i++)
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if (strcmp(id, useless_numbers[i]) == 0)
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return 1;
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return 0;
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}
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static int match(const char *id)
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{
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int i;
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if (npatterns == 0)
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return 1;
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for (i = 0; i < npatterns; i++) {
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if (!fnmatch(patterns[i], id, FNM_CASEFOLD))
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return 1;
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}
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return 0;
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}
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static void load_good_table(FILE *fp)
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{
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char buf[4096];
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struct nstat_ent *db = NULL;
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struct nstat_ent *n;
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while (fgets(buf, sizeof(buf), fp) != NULL) {
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int nr;
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unsigned long long val;
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double rate;
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char idbuf[sizeof(buf)];
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if (buf[0] == '#') {
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buf[strlen(buf)-1] = 0;
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if (info_source[0] && strcmp(info_source, buf+1))
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source_mismatch = 1;
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strlcpy(info_source, buf + 1, sizeof(info_source));
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continue;
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}
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/* idbuf is as big as buf, so this is safe */
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nr = sscanf(buf, "%s%llu%lg", idbuf, &val, &rate;;
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if (nr < 2) {
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fprintf(stderr, "%s:%d: error parsing history file\n",
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__FILE__, __LINE__);
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exit(-2);
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}
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if (nr < 3)
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rate = 0;
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if (useless_number(idbuf))
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continue;
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if ((n = malloc(sizeof(*n))) == NULL) {
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perror("nstat: malloc");
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exit(-1);
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}
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n->id = strdup(idbuf);
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n->val = val;
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n->rate = rate;
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n->next = db;
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db = n;
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}
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while (db) {
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n = db;
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db = db->next;
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n->next = kern_db;
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kern_db = n;
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}
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}
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static int count_spaces(const char *line)
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{
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int count = 0;
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char c;
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while ((c = *line++) != 0)
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count += c == ' ' || c == '\n';
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return count;
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}
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static void load_ugly_table(FILE *fp)
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{
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char *buf = NULL;
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size_t buflen = 0;
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ssize_t nread;
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struct nstat_ent *db = NULL;
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struct nstat_ent *n;
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while ((nread = getline(&buf, &buflen, fp)) != -1) {
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char idbuf[4096];
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int off;
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char *p;
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int count1, count2, skip = 0;
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p = strchr(buf, ':');
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if (!p) {
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fprintf(stderr, "%s:%d: error parsing history file\n",
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__FILE__, __LINE__);
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exit(-2);
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}
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count1 = count_spaces(buf);
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*p = 0;
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idbuf[0] = 0;
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strncat(idbuf, buf, sizeof(idbuf) - 1);
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off = p - buf;
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p += 2;
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while (*p) {
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char *next;
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if ((next = strchr(p, ' ')) != NULL)
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*next++ = 0;
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else if ((next = strchr(p, '\n')) != NULL)
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*next++ = 0;
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if (off < sizeof(idbuf)) {
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idbuf[off] = 0;
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strncat(idbuf, p, sizeof(idbuf) - off - 1);
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}
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n = malloc(sizeof(*n));
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if (!n) {
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perror("nstat: malloc");
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exit(-1);
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}
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n->id = strdup(idbuf);
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n->rate = 0;
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n->next = db;
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db = n;
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p = next;
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}
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n = db;
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nread = getline(&buf, &buflen, fp);
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if (nread == -1) {
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fprintf(stderr, "%s:%d: error parsing history file\n",
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__FILE__, __LINE__);
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exit(-2);
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}
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count2 = count_spaces(buf);
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if (count2 > count1)
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skip = count2 - count1;
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do {
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p = strrchr(buf, ' ');
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if (!p) {
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fprintf(stderr, "%s:%d: error parsing history file\n",
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__FILE__, __LINE__);
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exit(-2);
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}
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*p = 0;
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if (sscanf(p+1, "%llu", &n->val) != 1) {
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fprintf(stderr, "%s:%d: error parsing history file\n",
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__FILE__, __LINE__);
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exit(-2);
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}
|
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/* Trick to skip "dummy" trailing ICMP MIB in 2.4 */
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if (skip)
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skip--;
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else
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n = n->next;
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} while (p > buf + off + 2);
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}
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free(buf);
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while (db) {
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n = db;
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db = db->next;
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if (useless_number(n->id)) {
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free(n->id);
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|
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free(n);
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|
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} else {
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|
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n->next = kern_db;
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|
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kern_db = n;
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|
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}
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}
|
|
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}
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|
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static void load_sctp_snmp(void)
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|
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{
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FILE *fp = fdopen(net_sctp_snmp_open(), "r");
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if (fp) {
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load_good_table(fp);
|
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fclose(fp);
|
|
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}
|
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}
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|
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static void load_snmp(void)
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{
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FILE *fp = fdopen(net_snmp_open(), "r");
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3880ab |
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if (fp) {
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|
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load_ugly_table(fp);
|
|
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fclose(fp);
|
|
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}
|
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}
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|
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static void load_snmp6(void)
|
|
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{
|
|
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3880ab |
FILE *fp = fdopen(net_snmp6_open(), "r");
|
|
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3880ab |
|
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if (fp) {
|
|
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load_good_table(fp);
|
|
Packit Service |
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fclose(fp);
|
|
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}
|
|
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}
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|
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|
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static void load_netstat(void)
|
|
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{
|
|
Packit Service |
3880ab |
FILE *fp = fdopen(net_netstat_open(), "r");
|
|
Packit Service |
3880ab |
|
|
Packit Service |
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if (fp) {
|
|
Packit Service |
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load_ugly_table(fp);
|
|
Packit Service |
3880ab |
fclose(fp);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
static void dump_kern_db(FILE *fp, int to_hist)
|
|
Packit Service |
3880ab |
{
|
|
Packit Service |
3880ab |
json_writer_t *jw = json_output ? jsonw_new(fp) : NULL;
|
|
Packit Service |
3880ab |
struct nstat_ent *n, *h;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
h = hist_db;
|
|
Packit Service |
3880ab |
if (jw) {
|
|
Packit Service |
3880ab |
jsonw_start_object(jw);
|
|
Packit Service |
3880ab |
jsonw_pretty(jw, pretty);
|
|
Packit Service |
3880ab |
jsonw_name(jw, info_source);
|
|
Packit Service |
3880ab |
jsonw_start_object(jw);
|
|
Packit Service |
3880ab |
} else
|
|
Packit Service |
3880ab |
fprintf(fp, "#%s\n", info_source);
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
for (n = kern_db; n; n = n->next) {
|
|
Packit Service |
3880ab |
unsigned long long val = n->val;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (!dump_zeros && !val && !n->rate)
|
|
Packit Service |
3880ab |
continue;
|
|
Packit Service |
3880ab |
if (!match(n->id)) {
|
|
Packit Service |
3880ab |
struct nstat_ent *h1;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (!to_hist)
|
|
Packit Service |
3880ab |
continue;
|
|
Packit Service |
3880ab |
for (h1 = h; h1; h1 = h1->next) {
|
|
Packit Service |
3880ab |
if (strcmp(h1->id, n->id) == 0) {
|
|
Packit Service |
3880ab |
val = h1->val;
|
|
Packit Service |
3880ab |
h = h1->next;
|
|
Packit Service |
3880ab |
break;
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (jw)
|
|
Packit Service |
3880ab |
jsonw_uint_field(jw, n->id, val);
|
|
Packit Service |
3880ab |
else
|
|
Packit Service |
3880ab |
fprintf(fp, "%-32s%-16llu%6.1f\n", n->id, val, n->rate);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (jw) {
|
|
Packit Service |
3880ab |
jsonw_end_object(jw);
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
jsonw_end_object(jw);
|
|
Packit Service |
3880ab |
jsonw_destroy(&jw;;
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
static void dump_incr_db(FILE *fp)
|
|
Packit Service |
3880ab |
{
|
|
Packit Service |
3880ab |
json_writer_t *jw = json_output ? jsonw_new(fp) : NULL;
|
|
Packit Service |
3880ab |
struct nstat_ent *n, *h;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
h = hist_db;
|
|
Packit Service |
3880ab |
if (jw) {
|
|
Packit Service |
3880ab |
jsonw_start_object(jw);
|
|
Packit Service |
3880ab |
jsonw_pretty(jw, pretty);
|
|
Packit Service |
3880ab |
jsonw_name(jw, info_source);
|
|
Packit Service |
3880ab |
jsonw_start_object(jw);
|
|
Packit Service |
3880ab |
} else
|
|
Packit Service |
3880ab |
fprintf(fp, "#%s\n", info_source);
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
for (n = kern_db; n; n = n->next) {
|
|
Packit Service |
3880ab |
int ovfl = 0;
|
|
Packit Service |
3880ab |
unsigned long long val = n->val;
|
|
Packit Service |
3880ab |
struct nstat_ent *h1;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
for (h1 = h; h1; h1 = h1->next) {
|
|
Packit Service |
3880ab |
if (strcmp(h1->id, n->id) == 0) {
|
|
Packit Service |
3880ab |
if (val < h1->val) {
|
|
Packit Service |
3880ab |
ovfl = 1;
|
|
Packit Service |
3880ab |
val = h1->val;
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
val -= h1->val;
|
|
Packit Service |
3880ab |
h = h1->next;
|
|
Packit Service |
3880ab |
break;
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
if (!dump_zeros && !val && !n->rate)
|
|
Packit Service |
3880ab |
continue;
|
|
Packit Service |
3880ab |
if (!match(n->id))
|
|
Packit Service |
3880ab |
continue;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (jw)
|
|
Packit Service |
3880ab |
jsonw_uint_field(jw, n->id, val);
|
|
Packit Service |
3880ab |
else
|
|
Packit Service |
3880ab |
fprintf(fp, "%-32s%-16llu%6.1f%s\n", n->id, val,
|
|
Packit Service |
3880ab |
n->rate, ovfl?" (overflow)":"");
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (jw) {
|
|
Packit Service |
3880ab |
jsonw_end_object(jw);
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
jsonw_end_object(jw);
|
|
Packit Service |
3880ab |
jsonw_destroy(&jw;;
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
static int children;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
static void sigchild(int signo)
|
|
Packit Service |
3880ab |
{
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
static void update_db(int interval)
|
|
Packit Service |
3880ab |
{
|
|
Packit Service |
3880ab |
struct nstat_ent *n, *h;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
n = kern_db;
|
|
Packit Service |
3880ab |
kern_db = NULL;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
load_netstat();
|
|
Packit Service |
3880ab |
load_snmp6();
|
|
Packit Service |
3880ab |
load_snmp();
|
|
Packit Service |
3880ab |
load_sctp_snmp();
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
h = kern_db;
|
|
Packit Service |
3880ab |
kern_db = n;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
for (n = kern_db; n; n = n->next) {
|
|
Packit Service |
3880ab |
struct nstat_ent *h1;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
for (h1 = h; h1; h1 = h1->next) {
|
|
Packit Service |
3880ab |
if (strcmp(h1->id, n->id) == 0) {
|
|
Packit Service |
3880ab |
double sample;
|
|
Packit Service |
3880ab |
unsigned long long incr = h1->val - n->val;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
n->val = h1->val;
|
|
Packit Service |
3880ab |
sample = (double)incr * 1000.0 / interval;
|
|
Packit Service |
3880ab |
if (interval >= scan_interval) {
|
|
Packit Service |
3880ab |
n->rate += W*(sample-n->rate);
|
|
Packit Service |
3880ab |
} else if (interval >= 1000) {
|
|
Packit Service |
3880ab |
if (interval >= time_constant) {
|
|
Packit Service |
3880ab |
n->rate = sample;
|
|
Packit Service |
3880ab |
} else {
|
|
Packit Service |
3880ab |
double w = W*(double)interval/scan_interval;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
n->rate += w*(sample-n->rate);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
while (h != h1) {
|
|
Packit Service |
3880ab |
struct nstat_ent *tmp = h;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
h = h->next;
|
|
Packit Service |
3880ab |
free(tmp->id);
|
|
Packit Service |
3880ab |
free(tmp);
|
|
Packit Service |
3880ab |
};
|
|
Packit Service |
3880ab |
h = h1->next;
|
|
Packit Service |
3880ab |
free(h1->id);
|
|
Packit Service |
3880ab |
free(h1);
|
|
Packit Service |
3880ab |
break;
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
#define T_DIFF(a, b) (((a).tv_sec-(b).tv_sec)*1000 + ((a).tv_usec-(b).tv_usec)/1000)
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
static void server_loop(int fd)
|
|
Packit Service |
3880ab |
{
|
|
Packit Service |
3880ab |
struct timeval snaptime = { 0 };
|
|
Packit Service |
3880ab |
struct pollfd p;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
p.fd = fd;
|
|
Packit Service |
3880ab |
p.events = p.revents = POLLIN;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
sprintf(info_source, "%d.%lu sampling_interval=%d time_const=%d",
|
|
Packit Service |
3880ab |
getpid(), (unsigned long)random(), scan_interval/1000, time_constant/1000);
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
load_netstat();
|
|
Packit Service |
3880ab |
load_snmp6();
|
|
Packit Service |
3880ab |
load_snmp();
|
|
Packit Service |
3880ab |
load_sctp_snmp();
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
for (;;) {
|
|
Packit Service |
3880ab |
int status;
|
|
Packit Service |
3880ab |
time_t tdiff;
|
|
Packit Service |
3880ab |
struct timeval now;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
gettimeofday(&now, NULL);
|
|
Packit Service |
3880ab |
tdiff = T_DIFF(now, snaptime);
|
|
Packit Service |
3880ab |
if (tdiff >= scan_interval) {
|
|
Packit Service |
3880ab |
update_db(tdiff);
|
|
Packit Service |
3880ab |
snaptime = now;
|
|
Packit Service |
3880ab |
tdiff = 0;
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
if (poll(&p, 1, scan_interval - tdiff) > 0
|
|
Packit Service |
3880ab |
&& (p.revents&POLLIN)) {
|
|
Packit Service |
3880ab |
int clnt = accept(fd, NULL, NULL);
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (clnt >= 0) {
|
|
Packit Service |
3880ab |
pid_t pid;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (children >= 5) {
|
|
Packit Service |
3880ab |
close(clnt);
|
|
Packit Service |
3880ab |
} else if ((pid = fork()) != 0) {
|
|
Packit Service |
3880ab |
if (pid > 0)
|
|
Packit Service |
3880ab |
children++;
|
|
Packit Service |
3880ab |
close(clnt);
|
|
Packit Service |
3880ab |
} else {
|
|
Packit Service |
3880ab |
FILE *fp = fdopen(clnt, "w");
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (fp)
|
|
Packit Service |
3880ab |
dump_kern_db(fp, 0);
|
|
Packit Service |
3880ab |
exit(0);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
while (children && waitpid(-1, &status, WNOHANG) > 0)
|
|
Packit Service |
3880ab |
children--;
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
static int verify_forging(int fd)
|
|
Packit Service |
3880ab |
{
|
|
Packit Service |
3880ab |
struct ucred cred;
|
|
Packit Service |
3880ab |
socklen_t olen = sizeof(cred);
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, (void *)&cred, &olen) ||
|
|
Packit Service |
3880ab |
olen < sizeof(cred))
|
|
Packit Service |
3880ab |
return -1;
|
|
Packit Service |
3880ab |
if (cred.uid == getuid() || cred.uid == 0)
|
|
Packit Service |
3880ab |
return 0;
|
|
Packit Service |
3880ab |
return -1;
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
static void usage(void) __attribute__((noreturn));
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
static void usage(void)
|
|
Packit Service |
3880ab |
{
|
|
Packit Service |
3880ab |
fprintf(stderr,
|
|
Packit Service |
3880ab |
"Usage: nstat [OPTION] [ PATTERN [ PATTERN ] ]\n"
|
|
Packit Service |
3880ab |
" -h, --help this message\n"
|
|
Packit Service |
3880ab |
" -a, --ignore ignore history\n"
|
|
Packit Service |
3880ab |
" -d, --scan=SECS sample every statistics every SECS\n"
|
|
Packit Service |
3880ab |
" -j, --json format output in JSON\n"
|
|
Packit Service |
3880ab |
" -n, --nooutput do history only\n"
|
|
Packit Service |
3880ab |
" -p, --pretty pretty print\n"
|
|
Packit Service |
3880ab |
" -r, --reset reset history\n"
|
|
Packit Service |
3880ab |
" -s, --noupdate don't update history\n"
|
|
Packit Service |
3880ab |
" -t, --interval=SECS report average over the last SECS\n"
|
|
Packit Service |
3880ab |
" -V, --version output version information\n"
|
|
Packit Service |
3880ab |
" -z, --zeros show entries with zero activity\n");
|
|
Packit Service |
3880ab |
exit(-1);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
static const struct option longopts[] = {
|
|
Packit Service |
3880ab |
{ "help", 0, 0, 'h' },
|
|
Packit Service |
3880ab |
{ "ignore", 0, 0, 'a' },
|
|
Packit Service |
3880ab |
{ "scan", 1, 0, 'd'},
|
|
Packit Service |
3880ab |
{ "nooutput", 0, 0, 'n' },
|
|
Packit Service |
3880ab |
{ "json", 0, 0, 'j' },
|
|
Packit Service |
3880ab |
{ "reset", 0, 0, 'r' },
|
|
Packit Service |
3880ab |
{ "noupdate", 0, 0, 's' },
|
|
Packit Service |
3880ab |
{ "pretty", 0, 0, 'p' },
|
|
Packit Service |
3880ab |
{ "interval", 1, 0, 't' },
|
|
Packit Service |
3880ab |
{ "version", 0, 0, 'V' },
|
|
Packit Service |
3880ab |
{ "zeros", 0, 0, 'z' },
|
|
Packit Service |
3880ab |
{ 0 }
|
|
Packit Service |
3880ab |
};
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
int main(int argc, char *argv[])
|
|
Packit Service |
3880ab |
{
|
|
Packit Service |
3880ab |
char *hist_name;
|
|
Packit Service |
3880ab |
struct sockaddr_un sun;
|
|
Packit Service |
3880ab |
FILE *hist_fp = NULL;
|
|
Packit Service |
3880ab |
int ch;
|
|
Packit Service |
3880ab |
int fd;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
while ((ch = getopt_long(argc, argv, "h?vVzrnasd:t:jp",
|
|
Packit Service |
3880ab |
longopts, NULL)) != EOF) {
|
|
Packit Service |
3880ab |
switch (ch) {
|
|
Packit Service |
3880ab |
case 'z':
|
|
Packit Service |
3880ab |
dump_zeros = 1;
|
|
Packit Service |
3880ab |
break;
|
|
Packit Service |
3880ab |
case 'r':
|
|
Packit Service |
3880ab |
reset_history = 1;
|
|
Packit Service |
3880ab |
break;
|
|
Packit Service |
3880ab |
case 'a':
|
|
Packit Service |
3880ab |
ignore_history = 1;
|
|
Packit Service |
3880ab |
break;
|
|
Packit Service |
3880ab |
case 's':
|
|
Packit Service |
3880ab |
no_update = 1;
|
|
Packit Service |
3880ab |
break;
|
|
Packit Service |
3880ab |
case 'n':
|
|
Packit Service |
3880ab |
no_output = 1;
|
|
Packit Service |
3880ab |
break;
|
|
Packit Service |
3880ab |
case 'd':
|
|
Packit Service |
3880ab |
scan_interval = 1000*atoi(optarg);
|
|
Packit Service |
3880ab |
break;
|
|
Packit Service |
3880ab |
case 't':
|
|
Packit Service |
3880ab |
if (sscanf(optarg, "%d", &time_constant) != 1 ||
|
|
Packit Service |
3880ab |
time_constant <= 0) {
|
|
Packit Service |
3880ab |
fprintf(stderr, "nstat: invalid time constant divisor\n");
|
|
Packit Service |
3880ab |
exit(-1);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
break;
|
|
Packit Service |
3880ab |
case 'j':
|
|
Packit Service |
3880ab |
json_output = 1;
|
|
Packit Service |
3880ab |
break;
|
|
Packit Service |
3880ab |
case 'p':
|
|
Packit Service |
3880ab |
pretty = 1;
|
|
Packit Service |
3880ab |
break;
|
|
Packit Service |
3880ab |
case 'v':
|
|
Packit Service |
3880ab |
case 'V':
|
|
Packit Service |
3880ab |
printf("nstat utility, iproute2-%s\n", version);
|
|
Packit Service |
3880ab |
exit(0);
|
|
Packit Service |
3880ab |
case 'h':
|
|
Packit Service |
3880ab |
case '?':
|
|
Packit Service |
3880ab |
default:
|
|
Packit Service |
3880ab |
usage();
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
argc -= optind;
|
|
Packit Service |
3880ab |
argv += optind;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
sun.sun_family = AF_UNIX;
|
|
Packit Service |
3880ab |
sun.sun_path[0] = 0;
|
|
Packit Service |
3880ab |
sprintf(sun.sun_path+1, "nstat%d", getuid());
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (scan_interval > 0) {
|
|
Packit Service |
3880ab |
if (time_constant == 0)
|
|
Packit Service |
3880ab |
time_constant = 60;
|
|
Packit Service |
3880ab |
time_constant *= 1000;
|
|
Packit Service |
3880ab |
W = 1 - 1/exp(log(10)*(double)scan_interval/time_constant);
|
|
Packit Service |
3880ab |
if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
|
|
Packit Service |
3880ab |
perror("nstat: socket");
|
|
Packit Service |
3880ab |
exit(-1);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
if (bind(fd, (struct sockaddr *)&sun, 2+1+strlen(sun.sun_path+1)) < 0) {
|
|
Packit Service |
3880ab |
perror("nstat: bind");
|
|
Packit Service |
3880ab |
exit(-1);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
if (listen(fd, 5) < 0) {
|
|
Packit Service |
3880ab |
perror("nstat: listen");
|
|
Packit Service |
3880ab |
exit(-1);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
if (daemon(0, 0)) {
|
|
Packit Service |
3880ab |
perror("nstat: daemon");
|
|
Packit Service |
3880ab |
exit(-1);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
signal(SIGPIPE, SIG_IGN);
|
|
Packit Service |
3880ab |
signal(SIGCHLD, sigchild);
|
|
Packit Service |
3880ab |
server_loop(fd);
|
|
Packit Service |
3880ab |
exit(0);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
patterns = argv;
|
|
Packit Service |
3880ab |
npatterns = argc;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if ((hist_name = getenv("NSTAT_HISTORY")) == NULL) {
|
|
Packit Service |
3880ab |
hist_name = malloc(128);
|
|
Packit Service |
3880ab |
sprintf(hist_name, "/tmp/.nstat.u%d", getuid());
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (reset_history)
|
|
Packit Service |
3880ab |
unlink(hist_name);
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (!ignore_history || !no_update) {
|
|
Packit Service |
3880ab |
struct stat stb;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
fd = open(hist_name, O_RDWR|O_CREAT|O_NOFOLLOW, 0600);
|
|
Packit Service |
3880ab |
if (fd < 0) {
|
|
Packit Service |
3880ab |
perror("nstat: open history file");
|
|
Packit Service |
3880ab |
exit(-1);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
if ((hist_fp = fdopen(fd, "r+")) == NULL) {
|
|
Packit Service |
3880ab |
perror("nstat: fdopen history file");
|
|
Packit Service |
3880ab |
exit(-1);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
if (flock(fileno(hist_fp), LOCK_EX)) {
|
|
Packit Service |
3880ab |
perror("nstat: flock history file");
|
|
Packit Service |
3880ab |
exit(-1);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
if (fstat(fileno(hist_fp), &stb) != 0) {
|
|
Packit Service |
3880ab |
perror("nstat: fstat history file");
|
|
Packit Service |
3880ab |
exit(-1);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
if (stb.st_nlink != 1 || stb.st_uid != getuid()) {
|
|
Packit Service |
3880ab |
fprintf(stderr, "nstat: something is so wrong with history file, that I prefer not to proceed.\n");
|
|
Packit Service |
3880ab |
exit(-1);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
if (!ignore_history) {
|
|
Packit Service |
3880ab |
FILE *tfp;
|
|
Packit Service |
3880ab |
long uptime = -1;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if ((tfp = fopen("/proc/uptime", "r")) != NULL) {
|
|
Packit Service |
3880ab |
if (fscanf(tfp, "%ld", &uptime) != 1)
|
|
Packit Service |
3880ab |
uptime = -1;
|
|
Packit Service |
3880ab |
fclose(tfp);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
if (uptime >= 0 && time(NULL) >= stb.st_mtime+uptime) {
|
|
Packit Service |
3880ab |
fprintf(stderr, "nstat: history is aged out, resetting\n");
|
|
Packit Service |
3880ab |
if (ftruncate(fileno(hist_fp), 0) < 0)
|
|
Packit Service |
3880ab |
perror("nstat: ftruncate");
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
load_good_table(hist_fp);
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
hist_db = kern_db;
|
|
Packit Service |
3880ab |
kern_db = NULL;
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) >= 0 &&
|
|
Packit Service |
3880ab |
(connect(fd, (struct sockaddr *)&sun, 2+1+strlen(sun.sun_path+1)) == 0
|
|
Packit Service |
3880ab |
|| (strcpy(sun.sun_path+1, "nstat0"),
|
|
Packit Service |
3880ab |
connect(fd, (struct sockaddr *)&sun, 2+1+strlen(sun.sun_path+1)) == 0))
|
|
Packit Service |
3880ab |
&& verify_forging(fd) == 0) {
|
|
Packit Service |
3880ab |
FILE *sfp = fdopen(fd, "r");
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (!sfp) {
|
|
Packit Service |
3880ab |
fprintf(stderr, "nstat: fdopen failed: %s\n",
|
|
Packit Service |
3880ab |
strerror(errno));
|
|
Packit Service |
3880ab |
close(fd);
|
|
Packit Service |
3880ab |
} else {
|
|
Packit Service |
3880ab |
load_good_table(sfp);
|
|
Packit Service |
3880ab |
if (hist_db && source_mismatch) {
|
|
Packit Service |
3880ab |
fprintf(stderr, "nstat: history is stale, ignoring it.\n");
|
|
Packit Service |
3880ab |
hist_db = NULL;
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
fclose(sfp);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
} else {
|
|
Packit Service |
3880ab |
if (fd >= 0)
|
|
Packit Service |
3880ab |
close(fd);
|
|
Packit Service |
3880ab |
if (hist_db && info_source[0] && strcmp(info_source, "kernel")) {
|
|
Packit Service |
3880ab |
fprintf(stderr, "nstat: history is stale, ignoring it.\n");
|
|
Packit Service |
3880ab |
hist_db = NULL;
|
|
Packit Service |
3880ab |
info_source[0] = 0;
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
load_netstat();
|
|
Packit Service |
3880ab |
load_snmp6();
|
|
Packit Service |
3880ab |
load_snmp();
|
|
Packit Service |
3880ab |
load_sctp_snmp();
|
|
Packit Service |
3880ab |
if (info_source[0] == 0)
|
|
Packit Service |
3880ab |
strcpy(info_source, "kernel");
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (!no_output) {
|
|
Packit Service |
3880ab |
if (ignore_history || hist_db == NULL)
|
|
Packit Service |
3880ab |
dump_kern_db(stdout, 0);
|
|
Packit Service |
3880ab |
else
|
|
Packit Service |
3880ab |
dump_incr_db(stdout);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
if (!no_update) {
|
|
Packit Service |
3880ab |
if (ftruncate(fileno(hist_fp), 0) < 0)
|
|
Packit Service |
3880ab |
perror("nstat: ftruncate");
|
|
Packit Service |
3880ab |
rewind(hist_fp);
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
json_output = 0;
|
|
Packit Service |
3880ab |
dump_kern_db(hist_fp, 1);
|
|
Packit Service |
3880ab |
fclose(hist_fp);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
exit(0);
|
|
Packit Service |
3880ab |
}
|