Blame misc/ifstat.c

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/*
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 * ifstat.c	handy utility to read net interface statistics
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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 <linux/if.h>
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#include <linux/if_link.h>
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#include "libnetlink.h"
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#include "json_writer.h"
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#include "SNAPSHOT.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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int show_errors;
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double W;
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char **patterns;
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int npatterns;
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bool is_extended;
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int filter_type;
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int sub_type;
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char info_source[128];
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int source_mismatch;
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#define MAXS (sizeof(struct rtnl_link_stats)/sizeof(__u32))
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#define NO_SUB_TYPE 0xffff
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struct ifstat_ent {
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	struct ifstat_ent	*next;
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	char			*name;
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	int			ifindex;
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	__u64			val[MAXS];
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	double			rate[MAXS];
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	__u32			ival[MAXS];
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};
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static const char *stats[MAXS] = {
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	"rx_packets",
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	"tx_packets",
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	"rx_bytes",
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	"tx_bytes",
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	"rx_errors",
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	"tx_errors",
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	"rx_dropped",
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	"tx_dropped",
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	"multicast",
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	"collisions",
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	"rx_length_errors",
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	"rx_over_errors",
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	"rx_crc_errors",
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	"rx_frame_errors",
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	"rx_fifo_errors",
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	"rx_missed_errors",
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	"tx_aborted_errors",
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	"tx_carrier_errors",
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	"tx_fifo_errors",
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	"tx_heartbeat_errors",
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	"tx_window_errors",
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	"rx_compressed",
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	"tx_compressed"
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};
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struct ifstat_ent *kern_db;
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struct ifstat_ent *hist_db;
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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, 0))
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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 int get_nlmsg_extended(struct nlmsghdr *m, void *arg)
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{
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	struct if_stats_msg *ifsm = NLMSG_DATA(m);
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	struct rtattr *tb[IFLA_STATS_MAX+1];
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	int len = m->nlmsg_len;
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	struct ifstat_ent *n;
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	if (m->nlmsg_type != RTM_NEWSTATS)
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		return 0;
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	len -= NLMSG_LENGTH(sizeof(*ifsm));
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	if (len < 0)
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		return -1;
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	parse_rtattr(tb, IFLA_STATS_MAX, IFLA_STATS_RTA(ifsm), len);
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	if (tb[filter_type] == NULL)
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		return 0;
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	n = malloc(sizeof(*n));
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	if (!n)
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		abort();
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	n->ifindex = ifsm->ifindex;
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	n->name = strdup(ll_index_to_name(ifsm->ifindex));
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	if (sub_type == NO_SUB_TYPE) {
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		memcpy(&n->val, RTA_DATA(tb[filter_type]), sizeof(n->val));
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	} else {
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		struct rtattr *attr;
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		attr = parse_rtattr_one_nested(sub_type, tb[filter_type]);
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		if (attr == NULL) {
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			free(n);
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			return 0;
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		}
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		memcpy(&n->val, RTA_DATA(attr), sizeof(n->val));
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	}
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	memset(&n->rate, 0, sizeof(n->rate));
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	n->next = kern_db;
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	kern_db = n;
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	return 0;
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}
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static int get_nlmsg(struct nlmsghdr *m, void *arg)
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{
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	struct ifinfomsg *ifi = NLMSG_DATA(m);
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	struct rtattr *tb[IFLA_MAX+1];
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	int len = m->nlmsg_len;
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	struct ifstat_ent *n;
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	int i;
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	if (m->nlmsg_type != RTM_NEWLINK)
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		return 0;
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	len -= NLMSG_LENGTH(sizeof(*ifi));
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	if (len < 0)
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		return -1;
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	if (!(ifi->ifi_flags&IFF_UP))
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		return 0;
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	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
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	if (tb[IFLA_IFNAME] == NULL || tb[IFLA_STATS] == NULL)
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		return 0;
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	n = malloc(sizeof(*n));
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	if (!n)
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		abort();
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	n->ifindex = ifi->ifi_index;
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	n->name = strdup(RTA_DATA(tb[IFLA_IFNAME]));
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	memcpy(&n->ival, RTA_DATA(tb[IFLA_STATS]), sizeof(n->ival));
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	memset(&n->rate, 0, sizeof(n->rate));
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	for (i = 0; i < MAXS; i++)
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		n->val[i] = n->ival[i];
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	n->next = kern_db;
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	kern_db = n;
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	return 0;
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}
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static void load_info(void)
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{
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	struct ifstat_ent *db, *n;
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	struct rtnl_handle rth;
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	__u32 filter_mask;
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	if (rtnl_open(&rth, 0) < 0)
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		exit(1);
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	if (is_extended) {
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		ll_init_map(&rth);
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		filter_mask = IFLA_STATS_FILTER_BIT(filter_type);
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		if (rtnl_statsdump_req_filter(&rth, AF_UNSPEC,
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					      filter_mask) < 0) {
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			perror("Cannot send dump request");
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			exit(1);
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		}
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		if (rtnl_dump_filter(&rth, get_nlmsg_extended, NULL) < 0) {
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			fprintf(stderr, "Dump terminated\n");
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			exit(1);
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		}
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	} else {
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		if (rtnl_linkdump_req(&rth, AF_INET) < 0) {
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			perror("Cannot send dump request");
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			exit(1);
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		}
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		if (rtnl_dump_filter(&rth, get_nlmsg, NULL) < 0) {
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			fprintf(stderr, "Dump terminated\n");
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			exit(1);
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		}
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	}
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	rtnl_close(&rth);
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	db = kern_db;
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	kern_db = NULL;
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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 void load_raw_table(FILE *fp)
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{
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	char buf[4096];
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	struct ifstat_ent *db = NULL;
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	struct ifstat_ent *n;
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	while (fgets(buf, sizeof(buf), fp) != NULL) {
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		char *p;
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		char *next;
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		int i;
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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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			strncpy(info_source, buf+1, sizeof(info_source)-1);
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			continue;
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		}
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		if ((n = malloc(sizeof(*n))) == NULL)
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			abort();
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		if (!(p = strchr(buf, ' ')))
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			abort();
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		*p++ = 0;
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		if (sscanf(buf, "%d", &n->ifindex) != 1)
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			abort();
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		if (!(next = strchr(p, ' ')))
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			abort();
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		*next++ = 0;
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		n->name = strdup(p);
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		p = next;
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		for (i = 0; i < MAXS; i++) {
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			unsigned int rate;
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			if (!(next = strchr(p, ' ')))
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				abort();
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			*next++ = 0;
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			if (sscanf(p, "%llu", n->val+i) != 1)
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				abort();
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			n->ival[i] = (__u32)n->val[i];
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			p = next;
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			if (!(next = strchr(p, ' ')))
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				abort();
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			*next++ = 0;
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			if (sscanf(p, "%u", &rate) != 1)
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				abort();
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			n->rate[i] = rate;
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			p = next;
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		}
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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 void dump_raw_db(FILE *fp, int to_hist)
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{
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	json_writer_t *jw = json_output ? jsonw_new(fp) : NULL;
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	struct ifstat_ent *n, *h;
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	h = hist_db;
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	if (jw) {
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		jsonw_start_object(jw);
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		jsonw_pretty(jw, pretty);
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		jsonw_name(jw, info_source);
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		jsonw_start_object(jw);
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	} else
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		fprintf(fp, "#%s\n", info_source);
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	for (n = kern_db; n; n = n->next) {
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		int i;
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		unsigned long long *vals = n->val;
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		double *rates = n->rate;
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		if (!match(n->name)) {
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			struct ifstat_ent *h1;
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			if (!to_hist)
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				continue;
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			for (h1 = h; h1; h1 = h1->next) {
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				if (h1->ifindex == n->ifindex) {
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					vals = h1->val;
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					rates = h1->rate;
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					h = h1->next;
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					break;
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				}
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			}
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		}
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		if (jw) {
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			jsonw_name(jw, n->name);
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			jsonw_start_object(jw);
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			for (i = 0; i < MAXS && stats[i]; i++)
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				jsonw_uint_field(jw, stats[i], vals[i]);
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			jsonw_end_object(jw);
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		} else {
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			fprintf(fp, "%d %s ", n->ifindex, n->name);
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			for (i = 0; i < MAXS; i++)
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				fprintf(fp, "%llu %u ", vals[i],
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					(unsigned int)rates[i]);
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			fprintf(fp, "\n");
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		}
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	}
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	if (jw) {
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		jsonw_end_object(jw);
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		jsonw_end_object(jw);
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		jsonw_destroy(&jw;;
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	}
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}
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/* use communication definitions of meg/kilo etc */
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static const unsigned long long giga = 1000000000ull;
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static const unsigned long long mega = 1000000;
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static const unsigned long long kilo = 1000;
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static void format_rate(FILE *fp, const unsigned long long *vals,
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			const double *rates, int i)
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{
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	char temp[64];
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	if (vals[i] > giga)
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		fprintf(fp, "%7lluM ", vals[i]/mega);
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	else if (vals[i] > mega)
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		fprintf(fp, "%7lluK ", vals[i]/kilo);
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	else
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		fprintf(fp, "%8llu ", vals[i]);
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	if (rates[i] > mega) {
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		sprintf(temp, "%uM", (unsigned int)(rates[i]/mega));
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		fprintf(fp, "%-6s ", temp);
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	} else if (rates[i] > kilo) {
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		sprintf(temp, "%uK", (unsigned int)(rates[i]/kilo));
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		fprintf(fp, "%-6s ", temp);
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	} else
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		fprintf(fp, "%-6u ", (unsigned int)rates[i]);
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}
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static void format_pair(FILE *fp, const unsigned long long *vals, int i, int k)
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{
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	char temp[64];
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	if (vals[i] > giga)
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		fprintf(fp, "%7lluM ", vals[i]/mega);
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	else if (vals[i] > mega)
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		fprintf(fp, "%7lluK ", vals[i]/kilo);
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	else
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		fprintf(fp, "%8llu ", vals[i]);
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	if (vals[k] > giga) {
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		sprintf(temp, "%uM", (unsigned int)(vals[k]/mega));
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		fprintf(fp, "%-6s ", temp);
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	} else if (vals[k] > mega) {
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		sprintf(temp, "%uK", (unsigned int)(vals[k]/kilo));
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		fprintf(fp, "%-6s ", temp);
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	} else
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		fprintf(fp, "%-6u ", (unsigned int)vals[k]);
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}
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static void print_head(FILE *fp)
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{
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	fprintf(fp, "#%s\n", info_source);
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	fprintf(fp, "%-15s ", "Interface");
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	fprintf(fp, "%8s/%-6s ", "RX Pkts", "Rate");
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	fprintf(fp, "%8s/%-6s ", "TX Pkts", "Rate");
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	fprintf(fp, "%8s/%-6s ", "RX Data", "Rate");
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	fprintf(fp, "%8s/%-6s\n", "TX Data", "Rate");
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	if (!show_errors) {
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		fprintf(fp, "%-15s ", "");
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		fprintf(fp, "%8s/%-6s ", "RX Errs", "Drop");
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		fprintf(fp, "%8s/%-6s ", "TX Errs", "Drop");
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		fprintf(fp, "%8s/%-6s ", "RX Over", "Rate");
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		fprintf(fp, "%8s/%-6s\n", "TX Coll", "Rate");
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	} else {
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		fprintf(fp, "%-15s ", "");
Packit d3f73b
		fprintf(fp, "%8s/%-6s ", "RX Errs", "Rate");
Packit d3f73b
		fprintf(fp, "%8s/%-6s ", "RX Drop", "Rate");
Packit d3f73b
		fprintf(fp, "%8s/%-6s ", "RX Over", "Rate");
Packit d3f73b
		fprintf(fp, "%8s/%-6s\n", "RX Leng", "Rate");
Packit d3f73b
Packit d3f73b
		fprintf(fp, "%-15s ", "");
Packit d3f73b
		fprintf(fp, "%8s/%-6s ", "RX Crc", "Rate");
Packit d3f73b
		fprintf(fp, "%8s/%-6s ", "RX Frm", "Rate");
Packit d3f73b
		fprintf(fp, "%8s/%-6s ", "RX Fifo", "Rate");
Packit d3f73b
		fprintf(fp, "%8s/%-6s\n", "RX Miss", "Rate");
Packit d3f73b
Packit d3f73b
		fprintf(fp, "%-15s ", "");
Packit d3f73b
		fprintf(fp, "%8s/%-6s ", "TX Errs", "Rate");
Packit d3f73b
		fprintf(fp, "%8s/%-6s ", "TX Drop", "Rate");
Packit d3f73b
		fprintf(fp, "%8s/%-6s ", "TX Coll", "Rate");
Packit d3f73b
		fprintf(fp, "%8s/%-6s\n", "TX Carr", "Rate");
Packit d3f73b
Packit d3f73b
		fprintf(fp, "%-15s ", "");
Packit d3f73b
		fprintf(fp, "%8s/%-6s ", "TX Abrt", "Rate");
Packit d3f73b
		fprintf(fp, "%8s/%-6s ", "TX Fifo", "Rate");
Packit d3f73b
		fprintf(fp, "%8s/%-6s ", "TX Hear", "Rate");
Packit d3f73b
		fprintf(fp, "%8s/%-6s\n", "TX Wind", "Rate");
Packit d3f73b
	}
Packit d3f73b
}
Packit d3f73b
Packit d3f73b
static void print_one_json(json_writer_t *jw, const struct ifstat_ent *n,
Packit d3f73b
			   const unsigned long long *vals)
Packit d3f73b
{
Packit d3f73b
	int i, m = show_errors ? 20 : 10;
Packit d3f73b
Packit d3f73b
	jsonw_name(jw, n->name);
Packit d3f73b
	jsonw_start_object(jw);
Packit d3f73b
Packit d3f73b
	for (i = 0; i < m && stats[i]; i++)
Packit d3f73b
		jsonw_uint_field(jw, stats[i], vals[i]);
Packit d3f73b
Packit d3f73b
	jsonw_end_object(jw);
Packit d3f73b
}
Packit d3f73b
Packit d3f73b
static void print_one_if(FILE *fp, const struct ifstat_ent *n,
Packit d3f73b
			 const unsigned long long *vals)
Packit d3f73b
{
Packit d3f73b
	int i;
Packit d3f73b
Packit d3f73b
	fprintf(fp, "%-15s ", n->name);
Packit d3f73b
	for (i = 0; i < 4; i++)
Packit d3f73b
		format_rate(fp, vals, n->rate, i);
Packit d3f73b
	fprintf(fp, "\n");
Packit d3f73b
Packit d3f73b
	if (!show_errors) {
Packit d3f73b
		fprintf(fp, "%-15s ", "");
Packit d3f73b
		format_pair(fp, vals, 4, 6);
Packit d3f73b
		format_pair(fp, vals, 5, 7);
Packit d3f73b
		format_rate(fp, vals, n->rate, 11);
Packit d3f73b
		format_rate(fp, vals, n->rate, 9);
Packit d3f73b
		fprintf(fp, "\n");
Packit d3f73b
	} else {
Packit d3f73b
		fprintf(fp, "%-15s ", "");
Packit d3f73b
		format_rate(fp, vals, n->rate, 4);
Packit d3f73b
		format_rate(fp, vals, n->rate, 6);
Packit d3f73b
		format_rate(fp, vals, n->rate, 11);
Packit d3f73b
		format_rate(fp, vals, n->rate, 10);
Packit d3f73b
		fprintf(fp, "\n");
Packit d3f73b
Packit d3f73b
		fprintf(fp, "%-15s ", "");
Packit d3f73b
		format_rate(fp, vals, n->rate, 12);
Packit d3f73b
		format_rate(fp, vals, n->rate, 13);
Packit d3f73b
		format_rate(fp, vals, n->rate, 14);
Packit d3f73b
		format_rate(fp, vals, n->rate, 15);
Packit d3f73b
		fprintf(fp, "\n");
Packit d3f73b
Packit d3f73b
		fprintf(fp, "%-15s ", "");
Packit d3f73b
		format_rate(fp, vals, n->rate, 5);
Packit d3f73b
		format_rate(fp, vals, n->rate, 7);
Packit d3f73b
		format_rate(fp, vals, n->rate, 9);
Packit d3f73b
		format_rate(fp, vals, n->rate, 17);
Packit d3f73b
		fprintf(fp, "\n");
Packit d3f73b
Packit d3f73b
		fprintf(fp, "%-15s ", "");
Packit d3f73b
		format_rate(fp, vals, n->rate, 16);
Packit d3f73b
		format_rate(fp, vals, n->rate, 18);
Packit d3f73b
		format_rate(fp, vals, n->rate, 19);
Packit d3f73b
		format_rate(fp, vals, n->rate, 20);
Packit d3f73b
		fprintf(fp, "\n");
Packit d3f73b
	}
Packit d3f73b
}
Packit d3f73b
Packit d3f73b
static void dump_kern_db(FILE *fp)
Packit d3f73b
{
Packit d3f73b
	json_writer_t *jw = json_output ? jsonw_new(fp) : NULL;
Packit d3f73b
	struct ifstat_ent *n;
Packit d3f73b
Packit d3f73b
	if (jw) {
Packit d3f73b
		jsonw_start_object(jw);
Packit d3f73b
		jsonw_pretty(jw, pretty);
Packit d3f73b
		jsonw_name(jw, info_source);
Packit d3f73b
		jsonw_start_object(jw);
Packit d3f73b
	} else
Packit d3f73b
		print_head(fp);
Packit d3f73b
Packit d3f73b
	for (n = kern_db; n; n = n->next) {
Packit d3f73b
		if (!match(n->name))
Packit d3f73b
			continue;
Packit d3f73b
Packit d3f73b
		if (jw)
Packit d3f73b
			print_one_json(jw, n, n->val);
Packit d3f73b
		else
Packit d3f73b
			print_one_if(fp, n, n->val);
Packit d3f73b
	}
Packit d3f73b
	if (jw) {
Packit d3f73b
		jsonw_end_object(jw);
Packit d3f73b
Packit d3f73b
		jsonw_end_object(jw);
Packit d3f73b
		jsonw_destroy(&jw;;
Packit d3f73b
	}
Packit d3f73b
}
Packit d3f73b
Packit d3f73b
static void dump_incr_db(FILE *fp)
Packit d3f73b
{
Packit d3f73b
	struct ifstat_ent *n, *h;
Packit d3f73b
	json_writer_t *jw = json_output ? jsonw_new(fp) : NULL;
Packit d3f73b
Packit d3f73b
	h = hist_db;
Packit d3f73b
	if (jw) {
Packit d3f73b
		jsonw_start_object(jw);
Packit d3f73b
		jsonw_pretty(jw, pretty);
Packit d3f73b
		jsonw_name(jw, info_source);
Packit d3f73b
		jsonw_start_object(jw);
Packit d3f73b
	} else
Packit d3f73b
		print_head(fp);
Packit d3f73b
Packit d3f73b
	for (n = kern_db; n; n = n->next) {
Packit d3f73b
		int i;
Packit d3f73b
		unsigned long long vals[MAXS];
Packit d3f73b
		struct ifstat_ent *h1;
Packit d3f73b
Packit d3f73b
		memcpy(vals, n->val, sizeof(vals));
Packit d3f73b
Packit d3f73b
		for (h1 = h; h1; h1 = h1->next) {
Packit d3f73b
			if (h1->ifindex == n->ifindex) {
Packit d3f73b
				for (i = 0; i < MAXS; i++)
Packit d3f73b
					vals[i] -= h1->val[i];
Packit d3f73b
				h = h1->next;
Packit d3f73b
				break;
Packit d3f73b
			}
Packit d3f73b
		}
Packit d3f73b
		if (!match(n->name))
Packit d3f73b
			continue;
Packit d3f73b
Packit d3f73b
		if (jw)
Packit d3f73b
			print_one_json(jw, n, n->val);
Packit d3f73b
		else
Packit d3f73b
			print_one_if(fp, n, vals);
Packit d3f73b
	}
Packit d3f73b
Packit d3f73b
	if (jw) {
Packit d3f73b
		jsonw_end_object(jw);
Packit d3f73b
Packit d3f73b
		jsonw_end_object(jw);
Packit d3f73b
		jsonw_destroy(&jw;;
Packit d3f73b
	}
Packit d3f73b
}
Packit d3f73b
Packit d3f73b
static int children;
Packit d3f73b
Packit d3f73b
static void sigchild(int signo)
Packit d3f73b
{
Packit d3f73b
}
Packit d3f73b
Packit d3f73b
static void update_db(int interval)
Packit d3f73b
{
Packit d3f73b
	struct ifstat_ent *n, *h;
Packit d3f73b
Packit d3f73b
	n = kern_db;
Packit d3f73b
	kern_db = NULL;
Packit d3f73b
Packit d3f73b
	load_info();
Packit d3f73b
Packit d3f73b
	h = kern_db;
Packit d3f73b
	kern_db = n;
Packit d3f73b
Packit d3f73b
	for (n = kern_db; n; n = n->next) {
Packit d3f73b
		struct ifstat_ent *h1;
Packit d3f73b
Packit d3f73b
		for (h1 = h; h1; h1 = h1->next) {
Packit d3f73b
			if (h1->ifindex == n->ifindex) {
Packit d3f73b
				int i;
Packit d3f73b
Packit d3f73b
				for (i = 0; i < MAXS; i++) {
Packit d3f73b
					if ((long)(h1->ival[i] - n->ival[i]) < 0) {
Packit d3f73b
						memset(n->ival, 0, sizeof(n->ival));
Packit d3f73b
						break;
Packit d3f73b
					}
Packit d3f73b
				}
Packit d3f73b
				for (i = 0; i < MAXS; i++) {
Packit d3f73b
					double sample;
Packit d3f73b
					__u64 incr;
Packit d3f73b
Packit d3f73b
					if (is_extended) {
Packit d3f73b
						incr = h1->val[i] - n->val[i];
Packit d3f73b
						n->val[i] = h1->val[i];
Packit d3f73b
					} else {
Packit d3f73b
						incr = (__u32) (h1->ival[i] - n->ival[i]);
Packit d3f73b
						n->val[i] += incr;
Packit d3f73b
						n->ival[i] = h1->ival[i];
Packit d3f73b
					}
Packit d3f73b
Packit d3f73b
					sample = (double)(incr*1000)/interval;
Packit d3f73b
					if (interval >= scan_interval) {
Packit d3f73b
						n->rate[i] += W*(sample-n->rate[i]);
Packit d3f73b
					} else if (interval >= 1000) {
Packit d3f73b
						if (interval >= time_constant) {
Packit d3f73b
							n->rate[i] = sample;
Packit d3f73b
						} else {
Packit d3f73b
							double w = W*(double)interval/scan_interval;
Packit d3f73b
Packit d3f73b
							n->rate[i] += w*(sample-n->rate[i]);
Packit d3f73b
						}
Packit d3f73b
					}
Packit d3f73b
				}
Packit d3f73b
Packit d3f73b
				while (h != h1) {
Packit d3f73b
					struct ifstat_ent *tmp = h;
Packit d3f73b
Packit d3f73b
					h = h->next;
Packit d3f73b
					free(tmp->name);
Packit d3f73b
					free(tmp);
Packit d3f73b
				};
Packit d3f73b
				h = h1->next;
Packit d3f73b
				free(h1->name);
Packit d3f73b
				free(h1);
Packit d3f73b
				break;
Packit d3f73b
			}
Packit d3f73b
		}
Packit d3f73b
	}
Packit d3f73b
}
Packit d3f73b
Packit d3f73b
#define T_DIFF(a, b) (((a).tv_sec-(b).tv_sec)*1000 + ((a).tv_usec-(b).tv_usec)/1000)
Packit d3f73b
Packit d3f73b
Packit d3f73b
static void server_loop(int fd)
Packit d3f73b
{
Packit d3f73b
	struct timeval snaptime = { 0 };
Packit d3f73b
	struct pollfd p;
Packit d3f73b
Packit d3f73b
	p.fd = fd;
Packit d3f73b
	p.events = p.revents = POLLIN;
Packit d3f73b
Packit d3f73b
	sprintf(info_source, "%d.%lu sampling_interval=%d time_const=%d",
Packit d3f73b
		getpid(), (unsigned long)random(), scan_interval/1000, time_constant/1000);
Packit d3f73b
Packit d3f73b
	load_info();
Packit d3f73b
Packit d3f73b
	for (;;) {
Packit d3f73b
		int status;
Packit d3f73b
		time_t tdiff;
Packit d3f73b
		struct timeval now;
Packit d3f73b
Packit d3f73b
		gettimeofday(&now, NULL);
Packit d3f73b
		tdiff = T_DIFF(now, snaptime);
Packit d3f73b
		if (tdiff >= scan_interval) {
Packit d3f73b
			update_db(tdiff);
Packit d3f73b
			snaptime = now;
Packit d3f73b
			tdiff = 0;
Packit d3f73b
		}
Packit d3f73b
Packit d3f73b
		if (poll(&p, 1, scan_interval - tdiff) > 0
Packit d3f73b
		    && (p.revents&POLLIN)) {
Packit d3f73b
			int clnt = accept(fd, NULL, NULL);
Packit d3f73b
Packit d3f73b
			if (clnt >= 0) {
Packit d3f73b
				pid_t pid;
Packit d3f73b
Packit d3f73b
				if (children >= 5) {
Packit d3f73b
					close(clnt);
Packit d3f73b
				} else if ((pid = fork()) != 0) {
Packit d3f73b
					if (pid > 0)
Packit d3f73b
						children++;
Packit d3f73b
					close(clnt);
Packit d3f73b
				} else {
Packit d3f73b
					FILE *fp = fdopen(clnt, "w");
Packit d3f73b
Packit d3f73b
					if (fp)
Packit d3f73b
						dump_raw_db(fp, 0);
Packit d3f73b
					exit(0);
Packit d3f73b
				}
Packit d3f73b
			}
Packit d3f73b
		}
Packit d3f73b
		while (children && waitpid(-1, &status, WNOHANG) > 0)
Packit d3f73b
			children--;
Packit d3f73b
	}
Packit d3f73b
}
Packit d3f73b
Packit d3f73b
static int verify_forging(int fd)
Packit d3f73b
{
Packit d3f73b
	struct ucred cred;
Packit d3f73b
	socklen_t olen = sizeof(cred);
Packit d3f73b
Packit d3f73b
	if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, (void *)&cred, &olen) ||
Packit d3f73b
	    olen < sizeof(cred))
Packit d3f73b
		return -1;
Packit d3f73b
	if (cred.uid == getuid() || cred.uid == 0)
Packit d3f73b
		return 0;
Packit d3f73b
	return -1;
Packit d3f73b
}
Packit d3f73b
Packit d3f73b
static void xstat_usage(void)
Packit d3f73b
{
Packit d3f73b
	fprintf(stderr,
Packit d3f73b
"Usage: ifstat supported xstats:\n"
Packit d3f73b
"       cpu_hits       Counts only packets that went via the CPU.\n");
Packit d3f73b
}
Packit d3f73b
Packit d3f73b
struct extended_stats_options_t {
Packit d3f73b
	char *name;
Packit d3f73b
	int id;
Packit d3f73b
	int sub_type;
Packit d3f73b
};
Packit d3f73b
Packit d3f73b
/* Note: if one xstat name is subset of another, it should be before it in this
Packit d3f73b
 * list.
Packit d3f73b
 * Name length must be under 64 chars.
Packit d3f73b
 */
Packit d3f73b
static const struct extended_stats_options_t extended_stats_options[] = {
Packit d3f73b
	{"cpu_hits",  IFLA_STATS_LINK_OFFLOAD_XSTATS, IFLA_OFFLOAD_XSTATS_CPU_HIT},
Packit d3f73b
};
Packit d3f73b
Packit d3f73b
static const char *get_filter_type(const char *name)
Packit d3f73b
{
Packit d3f73b
	int name_len;
Packit d3f73b
	int i;
Packit d3f73b
Packit d3f73b
	name_len = strlen(name);
Packit d3f73b
	for (i = 0; i < ARRAY_SIZE(extended_stats_options); i++) {
Packit d3f73b
		const struct extended_stats_options_t *xstat;
Packit d3f73b
Packit d3f73b
		xstat = &extended_stats_options[i];
Packit d3f73b
		if (strncmp(name, xstat->name, name_len) == 0) {
Packit d3f73b
			filter_type = xstat->id;
Packit d3f73b
			sub_type = xstat->sub_type;
Packit d3f73b
			return xstat->name;
Packit d3f73b
		}
Packit d3f73b
	}
Packit d3f73b
Packit d3f73b
	fprintf(stderr, "invalid ifstat extension %s\n", name);
Packit d3f73b
	xstat_usage();
Packit d3f73b
	return NULL;
Packit d3f73b
}
Packit d3f73b
Packit d3f73b
static void usage(void) __attribute__((noreturn));
Packit d3f73b
Packit d3f73b
static void usage(void)
Packit d3f73b
{
Packit d3f73b
	fprintf(stderr,
Packit d3f73b
"Usage: ifstat [OPTION] [ PATTERN [ PATTERN ] ]\n"
Packit d3f73b
"   -h, --help           this message\n"
Packit d3f73b
"   -a, --ignore         ignore history\n"
Packit d3f73b
"   -d, --scan=SECS      sample every statistics every SECS\n"
Packit d3f73b
"   -e, --errors         show errors\n"
Packit d3f73b
"   -j, --json           format output in JSON\n"
Packit d3f73b
"   -n, --nooutput       do history only\n"
Packit d3f73b
"   -p, --pretty         pretty print\n"
Packit d3f73b
"   -r, --reset          reset history\n"
Packit d3f73b
"   -s, --noupdate       don't update history\n"
Packit d3f73b
"   -t, --interval=SECS  report average over the last SECS\n"
Packit d3f73b
"   -V, --version        output version information\n"
Packit d3f73b
"   -z, --zeros          show entries with zero activity\n"
Packit d3f73b
"   -x, --extended=TYPE  show extended stats of TYPE\n");
Packit d3f73b
Packit d3f73b
	exit(-1);
Packit d3f73b
}
Packit d3f73b
Packit d3f73b
static const struct option longopts[] = {
Packit d3f73b
	{ "help", 0, 0, 'h' },
Packit d3f73b
	{ "ignore",  0,  0, 'a' },
Packit d3f73b
	{ "scan", 1, 0, 'd'},
Packit d3f73b
	{ "errors", 0, 0, 'e' },
Packit d3f73b
	{ "nooutput", 0, 0, 'n' },
Packit d3f73b
	{ "json", 0, 0, 'j' },
Packit d3f73b
	{ "reset", 0, 0, 'r' },
Packit d3f73b
	{ "pretty", 0, 0, 'p' },
Packit d3f73b
	{ "noupdate", 0, 0, 's' },
Packit d3f73b
	{ "interval", 1, 0, 't' },
Packit d3f73b
	{ "version", 0, 0, 'V' },
Packit d3f73b
	{ "zeros", 0, 0, 'z' },
Packit d3f73b
	{ "extended", 1, 0, 'x'},
Packit d3f73b
	{ 0 }
Packit d3f73b
};
Packit d3f73b
Packit d3f73b
int main(int argc, char *argv[])
Packit d3f73b
{
Packit d3f73b
	char hist_name[128];
Packit d3f73b
	struct sockaddr_un sun;
Packit d3f73b
	FILE *hist_fp = NULL;
Packit d3f73b
	const char *stats_type = NULL;
Packit d3f73b
	int ch;
Packit d3f73b
	int fd;
Packit d3f73b
Packit d3f73b
	is_extended = false;
Packit d3f73b
	while ((ch = getopt_long(argc, argv, "hjpvVzrnasd:t:ex:",
Packit d3f73b
			longopts, NULL)) != EOF) {
Packit d3f73b
		switch (ch) {
Packit d3f73b
		case 'z':
Packit d3f73b
			dump_zeros = 1;
Packit d3f73b
			break;
Packit d3f73b
		case 'r':
Packit d3f73b
			reset_history = 1;
Packit d3f73b
			break;
Packit d3f73b
		case 'a':
Packit d3f73b
			ignore_history = 1;
Packit d3f73b
			break;
Packit d3f73b
		case 's':
Packit d3f73b
			no_update = 1;
Packit d3f73b
			break;
Packit d3f73b
		case 'n':
Packit d3f73b
			no_output = 1;
Packit d3f73b
			break;
Packit d3f73b
		case 'e':
Packit d3f73b
			show_errors = 1;
Packit d3f73b
			break;
Packit d3f73b
		case 'j':
Packit d3f73b
			json_output = 1;
Packit d3f73b
			break;
Packit d3f73b
		case 'p':
Packit d3f73b
			pretty = 1;
Packit d3f73b
			break;
Packit d3f73b
		case 'd':
Packit d3f73b
			scan_interval = atoi(optarg) * 1000;
Packit d3f73b
			if (scan_interval <= 0) {
Packit d3f73b
				fprintf(stderr, "ifstat: invalid scan interval\n");
Packit d3f73b
				exit(-1);
Packit d3f73b
			}
Packit d3f73b
			break;
Packit d3f73b
		case 't':
Packit d3f73b
			time_constant = atoi(optarg);
Packit d3f73b
			if (time_constant <= 0) {
Packit d3f73b
				fprintf(stderr, "ifstat: invalid time constant divisor\n");
Packit d3f73b
				exit(-1);
Packit d3f73b
			}
Packit d3f73b
			break;
Packit d3f73b
		case 'x':
Packit d3f73b
			stats_type = optarg;
Packit d3f73b
			is_extended = true;
Packit d3f73b
			break;
Packit d3f73b
		case 'v':
Packit d3f73b
		case 'V':
Packit d3f73b
			printf("ifstat utility, iproute2-ss%s\n", SNAPSHOT);
Packit d3f73b
			exit(0);
Packit d3f73b
		case 'h':
Packit d3f73b
		case '?':
Packit d3f73b
		default:
Packit d3f73b
			usage();
Packit d3f73b
		}
Packit d3f73b
	}
Packit d3f73b
Packit d3f73b
	argc -= optind;
Packit d3f73b
	argv += optind;
Packit d3f73b
Packit d3f73b
	if (stats_type) {
Packit d3f73b
		stats_type = get_filter_type(stats_type);
Packit d3f73b
		if (!stats_type)
Packit d3f73b
			exit(-1);
Packit d3f73b
	}
Packit d3f73b
Packit d3f73b
	sun.sun_family = AF_UNIX;
Packit d3f73b
	sun.sun_path[0] = 0;
Packit d3f73b
	sprintf(sun.sun_path+1, "ifstat%d", getuid());
Packit d3f73b
Packit d3f73b
	if (scan_interval > 0) {
Packit d3f73b
		if (time_constant == 0)
Packit d3f73b
			time_constant = 60;
Packit d3f73b
		time_constant *= 1000;
Packit d3f73b
		W = 1 - 1/exp(log(10)*(double)scan_interval/time_constant);
Packit d3f73b
		if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
Packit d3f73b
			perror("ifstat: socket");
Packit d3f73b
			exit(-1);
Packit d3f73b
		}
Packit d3f73b
		if (bind(fd, (struct sockaddr *)&sun, 2+1+strlen(sun.sun_path+1)) < 0) {
Packit d3f73b
			perror("ifstat: bind");
Packit d3f73b
			exit(-1);
Packit d3f73b
		}
Packit d3f73b
		if (listen(fd, 5) < 0) {
Packit d3f73b
			perror("ifstat: listen");
Packit d3f73b
			exit(-1);
Packit d3f73b
		}
Packit d3f73b
		if (daemon(0, 0)) {
Packit d3f73b
			perror("ifstat: daemon");
Packit d3f73b
			exit(-1);
Packit d3f73b
		}
Packit d3f73b
		signal(SIGPIPE, SIG_IGN);
Packit d3f73b
		signal(SIGCHLD, sigchild);
Packit d3f73b
		server_loop(fd);
Packit d3f73b
		exit(0);
Packit d3f73b
	}
Packit d3f73b
Packit d3f73b
	patterns = argv;
Packit d3f73b
	npatterns = argc;
Packit d3f73b
Packit d3f73b
	if (getenv("IFSTAT_HISTORY"))
Packit d3f73b
		snprintf(hist_name, sizeof(hist_name),
Packit d3f73b
			 "%s", getenv("IFSTAT_HISTORY"));
Packit d3f73b
	else
Packit d3f73b
		if (!stats_type)
Packit d3f73b
			snprintf(hist_name, sizeof(hist_name),
Packit d3f73b
				 "%s/.ifstat.u%d", P_tmpdir, getuid());
Packit d3f73b
		else
Packit d3f73b
			snprintf(hist_name, sizeof(hist_name),
Packit d3f73b
				 "%s/.%s_ifstat.u%d", P_tmpdir, stats_type,
Packit d3f73b
				 getuid());
Packit d3f73b
Packit d3f73b
	if (reset_history)
Packit d3f73b
		unlink(hist_name);
Packit d3f73b
Packit d3f73b
	if (!ignore_history || !no_update) {
Packit d3f73b
		struct stat stb;
Packit d3f73b
Packit d3f73b
		fd = open(hist_name, O_RDWR|O_CREAT|O_NOFOLLOW, 0600);
Packit d3f73b
		if (fd < 0) {
Packit d3f73b
			perror("ifstat: open history file");
Packit d3f73b
			exit(-1);
Packit d3f73b
		}
Packit d3f73b
		if ((hist_fp = fdopen(fd, "r+")) == NULL) {
Packit d3f73b
			perror("ifstat: fdopen history file");
Packit d3f73b
			exit(-1);
Packit d3f73b
		}
Packit d3f73b
		if (flock(fileno(hist_fp), LOCK_EX)) {
Packit d3f73b
			perror("ifstat: flock history file");
Packit d3f73b
			exit(-1);
Packit d3f73b
		}
Packit d3f73b
		if (fstat(fileno(hist_fp), &stb) != 0) {
Packit d3f73b
			perror("ifstat: fstat history file");
Packit d3f73b
			exit(-1);
Packit d3f73b
		}
Packit d3f73b
		if (stb.st_nlink != 1 || stb.st_uid != getuid()) {
Packit d3f73b
			fprintf(stderr, "ifstat: something is so wrong with history file, that I prefer not to proceed.\n");
Packit d3f73b
			exit(-1);
Packit d3f73b
		}
Packit d3f73b
		if (!ignore_history) {
Packit d3f73b
			FILE *tfp;
Packit d3f73b
			long uptime = -1;
Packit d3f73b
Packit d3f73b
			if ((tfp = fopen("/proc/uptime", "r")) != NULL) {
Packit d3f73b
				if (fscanf(tfp, "%ld", &uptime) != 1)
Packit d3f73b
					uptime = -1;
Packit d3f73b
				fclose(tfp);
Packit d3f73b
			}
Packit d3f73b
			if (uptime >= 0 && time(NULL) >= stb.st_mtime+uptime) {
Packit d3f73b
				fprintf(stderr, "ifstat: history is aged out, resetting\n");
Packit d3f73b
				if (ftruncate(fileno(hist_fp), 0))
Packit d3f73b
					perror("ifstat: ftruncate");
Packit d3f73b
			}
Packit d3f73b
		}
Packit d3f73b
Packit d3f73b
		load_raw_table(hist_fp);
Packit d3f73b
Packit d3f73b
		hist_db = kern_db;
Packit d3f73b
		kern_db = NULL;
Packit d3f73b
	}
Packit d3f73b
Packit d3f73b
	if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) >= 0 &&
Packit d3f73b
	    (connect(fd, (struct sockaddr *)&sun, 2+1+strlen(sun.sun_path+1)) == 0
Packit d3f73b
	     || (strcpy(sun.sun_path+1, "ifstat0"),
Packit d3f73b
		 connect(fd, (struct sockaddr *)&sun, 2+1+strlen(sun.sun_path+1)) == 0))
Packit d3f73b
	    && verify_forging(fd) == 0) {
Packit d3f73b
		FILE *sfp = fdopen(fd, "r");
Packit d3f73b
Packit d3f73b
		if (!sfp) {
Packit d3f73b
			fprintf(stderr, "ifstat: fdopen failed: %s\n",
Packit d3f73b
				strerror(errno));
Packit d3f73b
			close(fd);
Packit d3f73b
		} else  {
Packit d3f73b
			load_raw_table(sfp);
Packit d3f73b
			if (hist_db && source_mismatch) {
Packit d3f73b
				fprintf(stderr, "ifstat: history is stale, ignoring it.\n");
Packit d3f73b
				hist_db = NULL;
Packit d3f73b
			}
Packit d3f73b
			fclose(sfp);
Packit d3f73b
		}
Packit d3f73b
	} else {
Packit d3f73b
		if (fd >= 0)
Packit d3f73b
			close(fd);
Packit d3f73b
		if (hist_db && info_source[0] && strcmp(info_source, "kernel")) {
Packit d3f73b
			fprintf(stderr, "ifstat: history is stale, ignoring it.\n");
Packit d3f73b
			hist_db = NULL;
Packit d3f73b
			info_source[0] = 0;
Packit d3f73b
		}
Packit d3f73b
		load_info();
Packit d3f73b
		if (info_source[0] == 0)
Packit d3f73b
			strcpy(info_source, "kernel");
Packit d3f73b
	}
Packit d3f73b
Packit d3f73b
	if (!no_output) {
Packit d3f73b
		if (ignore_history || hist_db == NULL)
Packit d3f73b
			dump_kern_db(stdout);
Packit d3f73b
		else
Packit d3f73b
			dump_incr_db(stdout);
Packit d3f73b
	}
Packit d3f73b
Packit d3f73b
	if (!no_update) {
Packit d3f73b
		if (ftruncate(fileno(hist_fp), 0))
Packit d3f73b
			perror("ifstat: ftruncate");
Packit d3f73b
		rewind(hist_fp);
Packit d3f73b
Packit d3f73b
		json_output = 0;
Packit d3f73b
		dump_raw_db(hist_fp, 1);
Packit d3f73b
		fclose(hist_fp);
Packit d3f73b
	}
Packit d3f73b
	exit(0);
Packit d3f73b
}