src/libstatgrab/network_stats.c

/* 
 * i-scream central monitoring system
 * http://www.i-scream.org.uk
 * Copyright (C) 2000-2002 i-scream
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#include "statgrab.h"
#include <stdlib.h>
#ifdef SOLARIS
#include <kstat.h>
#include <sys/sysinfo.h>
#include <string.h>
#endif

#define START_VAL 1

network_stat_t *network_stat_init(int num_iface, int *wmark, network_stat_t *net_stats){
        int x;
        network_stat_t *net_stats_ptr;

        if(*wmark==-1){
                printf("new malloc\n");
                if((net_stats=malloc(START_VAL * sizeof(network_stat_t)))==NULL){
                        return NULL;
                }
                *wmark=START_VAL;
                net_stats_ptr=net_stats;
                for(x=0;x<(*wmark);x++){
                        net_stats_ptr->interface_name=NULL;
                        net_stats_ptr++;
                }
                return net_stats;
        }
        if(num_iface>(*wmark-1)){
                if((net_stats=realloc(net_stats, (*wmark)*2 * sizeof(network_stat_t)))==NULL){
                        return NULL;
                }

                *wmark=(*wmark)*2;
                net_stats_ptr=net_stats+num_iface;
                for(x=num_iface;x<(*wmark);x++){
                        net_stats_ptr->interface_name=NULL;
                        net_stats_ptr++;
                }
                return net_stats;
        }

        return net_stats;
}

network_stat_t *get_network_stats(int *entries){
        kstat_ctl_t *kc;
        kstat_t *ksp;
        kstat_named_t *knp;
        
        int interfaces=0;       
        network_stat_t *network_stat_ptr;
        static network_stat_t *network_stats=NULL;
        static int watermark=-1;

        if ((kc = kstat_open()) == NULL) {
                return NULL;
        }

        for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
                if (!strcmp(ksp->ks_class, "net")) {
                        kstat_read(kc, ksp, NULL);

                        if((knp=kstat_data_lookup(ksp, "rbytes64"))==NULL){
                                /* Not a network interface, so skip to the next entry */
                                continue;
                        }
                        network_stats=network_stat_init(interfaces, &watermark, network_stats);
                        if(network_stats==NULL){
                                return NULL;
                        }
                        network_stat_ptr=network_stats+interfaces;
                        network_stat_ptr->rx=knp->value.ui64;

                        if((knp=kstat_data_lookup(ksp, "obytes64"))==NULL){
                                /* Not a network interface, so skip to the next entry */
                                continue;
                        }
                        network_stat_ptr->tx=knp->value.ui64;
                        if(network_stat_ptr->interface_name!=NULL){
                                free(network_stat_ptr->interface_name);
                        }
                        network_stat_ptr->interface_name=strdup(ksp->ks_name);
                        interfaces++;
                }
        }
                
        kstat_close(kc);        

        *entries=interfaces;

        return network_stats;   

}

Revision:	1.2
Committed:	Tue Feb 18 23:23:36 2003 UTC (21 years, 3 months ago) by pajs
Content type:	text/plain
Branch:	MAIN
Changes since 1.1:	+2 -1 lines
Log Message:	Changed the kstat_close to not return NULL in event of a failure. If we cant close it, well there is nothing i can do about that, so i may as well at least return something useful since its done all the hardwork by that point. And anywan, it should never fail to close :)
#	User	Rev	Content
1	pajs	1.1	/*
2			* i-scream central monitoring system
3			* http://www.i-scream.org.uk
4			* Copyright (C) 2000-2002 i-scream
5			*
6			* This program is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU General Public License
8			* as published by the Free Software Foundation; either version 2
9			* of the License, or (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19			*/
20
21			#ifdef HAVE_CONFIG_H
22			#include "config.h"
23			#endif
24
25			#include <stdio.h>
26			#include "statgrab.h"
27			#include <stdlib.h>
28			#ifdef SOLARIS
29			#include <kstat.h>
30			#include <sys/sysinfo.h>
31			#include <string.h>
32			#endif
33
34			#define START_VAL 1
35
36			network_stat_t network_stat_init(int num_iface, int wmark, network_stat_t *net_stats){
37			int x;
38			network_stat_t *net_stats_ptr;
39
40			if(*wmark==-1){
41			printf("new malloc\n");
42			if((net_stats=malloc(START_VAL * sizeof(network_stat_t)))==NULL){
43			return NULL;
44			}
45			*wmark=START_VAL;
46			net_stats_ptr=net_stats;
47			for(x=0;x<(*wmark);x++){
48			net_stats_ptr->interface_name=NULL;
49			net_stats_ptr++;
50			}
51			return net_stats;
52			}
53			if(num_iface>(*wmark-1)){
54			if((net_stats=realloc(net_stats, (wmark)2 * sizeof(network_stat_t)))==NULL){
55			return NULL;
56			}
57
58			wmark=(wmark)*2;
59			net_stats_ptr=net_stats+num_iface;
60			for(x=num_iface;x<(*wmark);x++){
61			net_stats_ptr->interface_name=NULL;
62			net_stats_ptr++;
63			}
64			return net_stats;
65			}
66
67			return net_stats;
68			}
69
70			network_stat_t get_network_stats(int entries){
71			kstat_ctl_t *kc;
72			kstat_t *ksp;
73			kstat_named_t *knp;
74
75			int interfaces=0;
76			network_stat_t *network_stat_ptr;
77			static network_stat_t *network_stats=NULL;
78			static int watermark=-1;
79
80			if ((kc = kstat_open()) == NULL) {
81			return NULL;
82			}
83
84			for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
85			if (!strcmp(ksp->ks_class, "net")) {
86			kstat_read(kc, ksp, NULL);
87
88			if((knp=kstat_data_lookup(ksp, "rbytes64"))==NULL){
89			/* Not a network interface, so skip to the next entry */
90			continue;
91			}
92			network_stats=network_stat_init(interfaces, &watermark, network_stats);
93			if(network_stats==NULL){
94			return NULL;
95			}
96			network_stat_ptr=network_stats+interfaces;
97			network_stat_ptr->rx=knp->value.ui64;
98
99			if((knp=kstat_data_lookup(ksp, "obytes64"))==NULL){
100			/* Not a network interface, so skip to the next entry */
101			continue;
102			}
103			network_stat_ptr->tx=knp->value.ui64;
104			if(network_stat_ptr->interface_name!=NULL){
105			free(network_stat_ptr->interface_name);
106			}
107			network_stat_ptr->interface_name=strdup(ksp->ks_name);
108			interfaces++;
109			}
110			}
111	pajs	1.2
112			kstat_close(kc);
113	pajs	1.1
114			*entries=interfaces;
115
116			return network_stats;
117
118			}
119