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

static network_stat_t *network_stats=NULL;
static int interfaces=0;

void network_stat_init(int start, int end, network_stat_t *net_stats){

        for(net_stats+=start; start<end; start++){
                net_stats->interface_name=NULL;
                net_stats->tx=0;
                net_stats->rx=0;
                net_stats++;
        }
}

network_stat_t *network_stat_malloc(int needed_entries, int *cur_entries, network_stat_t *net_stats){

        if(net_stats==NULL){

                if((net_stats=malloc(needed_entries * sizeof(network_stat_t)))==NULL){
                        return NULL;
                }
                network_stat_init(0, needed_entries, net_stats);
                *cur_entries=needed_entries;

                return net_stats;
        }


        if(*cur_entries<needed_entries){
                net_stats=realloc(net_stats, (sizeof(network_stat_t)*needed_entries));
                if(net_stats==NULL){
                        return NULL;
                }
                network_stat_init(*cur_entries, needed_entries, net_stats);
                *cur_entries=needed_entries;
        }

        return net_stats;
}


network_stat_t *get_network_stats(int *entries){
        kstat_ctl_t *kc;
        kstat_t *ksp;
        kstat_named_t *knp;

        static int sizeof_network_stats=0;      
        
        network_stat_t *network_stat_ptr;

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

        interfaces=0;   

        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_malloc((interfaces+1), &sizeof_network_stats, 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);

                        network_stat_ptr->systime=time(NULL);
                        interfaces++;
                }
        }
                
        kstat_close(kc);        

        *entries=interfaces;

        return network_stats;   
}

network_stat_t *get_network_stats_diff(int *entries){
        static network_stat_t *network_stats_diff=NULL;
        static int sizeof_net_stats_diff=0;
        network_stat_t *network_stats_ptr, *network_stats_diff_ptr;
        int ifaces, x, y;

        if(network_stats==NULL){
                network_stats_ptr=get_network_stats(&ifaces);
                *entries=ifaces;
                return network_stats_ptr;
        }

        network_stats_diff=network_stat_malloc(interfaces, &sizeof_net_stats_diff, network_stats_diff);
        if(network_stats_diff==NULL){
                return NULL;
        }

        network_stats_ptr=network_stats;
        network_stats_diff_ptr=network_stats_diff;

        for(ifaces=0;ifaces<interfaces;ifaces++){
                if(network_stats_diff_ptr->interface_name!=NULL){
                        free(network_stats_diff_ptr->interface_name);
                }
                network_stats_diff_ptr->interface_name=strdup(network_stats_ptr->interface_name);
                network_stats_diff_ptr->tx=network_stats_ptr->tx;
                network_stats_diff_ptr->rx=network_stats_ptr->rx;
                network_stats_diff_ptr->systime=network_stats->systime;

                network_stats_ptr++;
                network_stats_diff_ptr++;
        }
        network_stats_ptr=get_network_stats(&ifaces);           
        network_stats_diff_ptr=network_stats_diff;

        for(x=0;x<sizeof_net_stats_diff;x++){

                if((strcmp(network_stats_diff_ptr->interface_name, network_stats_ptr->interface_name))==0){
                        network_stats_diff_ptr->tx = network_stats_ptr->tx - network_stats_diff_ptr->tx;
                        network_stats_diff_ptr->rx = network_stats_ptr->rx - network_stats_diff_ptr->rx;        
                        network_stats_diff_ptr->systime = network_stats_ptr->systime - network_stats_diff_ptr->systime; 
                }else{
                        
                        network_stats_ptr=network_stats;
                        for(y=0;y<ifaces;y++){
                                if((strcmp(network_stats_diff_ptr->interface_name, network_stats_ptr->interface_name))==0){
                                        network_stats_diff_ptr->tx = network_stats_ptr->tx - network_stats_diff_ptr->tx;
                                        network_stats_diff_ptr->rx = network_stats_ptr->rx - network_stats_diff_ptr->rx;        
                                        network_stats_diff_ptr->systime = network_stats_ptr->systime - network_stats_diff_ptr->systime; 
                                        break;
                                }

                                network_stats_ptr++;
                        }       
                }

                network_stats_ptr++;
                network_stats_diff_ptr++;
        }

        return network_stats_diff;
}       


Revision:	1.3
Committed:	Wed Feb 19 17:13:24 2003 UTC (21 years, 2 months ago) by pajs
Content type:	text/plain
Branch:	MAIN
Changes since 1.2:	+101 -29 lines
Log Message:	network stats now returns a diff() style function, to make it easy to show the exact average network traffic over a period of time.
#	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	pajs	1.3	static network_stat_t *network_stats=NULL;
35			static int interfaces=0;
36	pajs	1.1
37	pajs	1.3	void network_stat_init(int start, int end, network_stat_t *net_stats){
38
39			for(net_stats+=start; start<end; start++){
40			net_stats->interface_name=NULL;
41			net_stats->tx=0;
42			net_stats->rx=0;
43			net_stats++;
44			}
45			}
46
47			network_stat_t network_stat_malloc(int needed_entries, int cur_entries, network_stat_t *net_stats){
48
49			if(net_stats==NULL){
50
51			if((net_stats=malloc(needed_entries * sizeof(network_stat_t)))==NULL){
52	pajs	1.1	return NULL;
53			}
54	pajs	1.3	network_stat_init(0, needed_entries, net_stats);
55			*cur_entries=needed_entries;
56
57	pajs	1.1	return net_stats;
58			}
59	pajs	1.3
60
61			if(*cur_entries<needed_entries){
62			net_stats=realloc(net_stats, (sizeof(network_stat_t)*needed_entries));
63			if(net_stats==NULL){
64	pajs	1.1	return NULL;
65			}
66	pajs	1.3	network_stat_init(*cur_entries, needed_entries, net_stats);
67			*cur_entries=needed_entries;
68	pajs	1.1	}
69
70			return net_stats;
71			}
72
73	pajs	1.3
74	pajs	1.1	network_stat_t get_network_stats(int entries){
75			kstat_ctl_t *kc;
76			kstat_t *ksp;
77			kstat_named_t *knp;
78	pajs	1.3
79			static int sizeof_network_stats=0;
80	pajs	1.1
81			network_stat_t *network_stat_ptr;
82
83			if ((kc = kstat_open()) == NULL) {
84			return NULL;
85			}
86
87	pajs	1.3	interfaces=0;
88
89	pajs	1.1	for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
90			if (!strcmp(ksp->ks_class, "net")) {
91			kstat_read(kc, ksp, NULL);
92
93			if((knp=kstat_data_lookup(ksp, "rbytes64"))==NULL){
94			/* Not a network interface, so skip to the next entry */
95			continue;
96			}
97	pajs	1.3
98			network_stats=network_stat_malloc((interfaces+1), &sizeof_network_stats, network_stats);
99	pajs	1.1	if(network_stats==NULL){
100			return NULL;
101			}
102			network_stat_ptr=network_stats+interfaces;
103			network_stat_ptr->rx=knp->value.ui64;
104
105			if((knp=kstat_data_lookup(ksp, "obytes64"))==NULL){
106			/* Not a network interface, so skip to the next entry */
107			continue;
108			}
109			network_stat_ptr->tx=knp->value.ui64;
110			if(network_stat_ptr->interface_name!=NULL){
111			free(network_stat_ptr->interface_name);
112			}
113			network_stat_ptr->interface_name=strdup(ksp->ks_name);
114	pajs	1.3
115			network_stat_ptr->systime=time(NULL);
116	pajs	1.1	interfaces++;
117			}
118			}
119	pajs	1.2
120			kstat_close(kc);
121	pajs	1.1
122			*entries=interfaces;
123
124			return network_stats;
125	pajs	1.3	}
126
127			network_stat_t get_network_stats_diff(int entries){
128			static network_stat_t *network_stats_diff=NULL;
129			static int sizeof_net_stats_diff=0;
130			network_stat_t network_stats_ptr, network_stats_diff_ptr;
131			int ifaces, x, y;
132
133			if(network_stats==NULL){
134			network_stats_ptr=get_network_stats(&ifaces);
135			*entries=ifaces;
136			return network_stats_ptr;
137			}
138
139			network_stats_diff=network_stat_malloc(interfaces, &sizeof_net_stats_diff, network_stats_diff);
140			if(network_stats_diff==NULL){
141			return NULL;
142			}
143
144			network_stats_ptr=network_stats;
145			network_stats_diff_ptr=network_stats_diff;
146
147			for(ifaces=0;ifaces<interfaces;ifaces++){
148			if(network_stats_diff_ptr->interface_name!=NULL){
149			free(network_stats_diff_ptr->interface_name);
150			}
151			network_stats_diff_ptr->interface_name=strdup(network_stats_ptr->interface_name);
152			network_stats_diff_ptr->tx=network_stats_ptr->tx;
153			network_stats_diff_ptr->rx=network_stats_ptr->rx;
154			network_stats_diff_ptr->systime=network_stats->systime;
155
156			network_stats_ptr++;
157			network_stats_diff_ptr++;
158			}
159			network_stats_ptr=get_network_stats(&ifaces);
160			network_stats_diff_ptr=network_stats_diff;
161
162			for(x=0;x<sizeof_net_stats_diff;x++){
163
164			if((strcmp(network_stats_diff_ptr->interface_name, network_stats_ptr->interface_name))==0){
165			network_stats_diff_ptr->tx = network_stats_ptr->tx - network_stats_diff_ptr->tx;
166			network_stats_diff_ptr->rx = network_stats_ptr->rx - network_stats_diff_ptr->rx;
167			network_stats_diff_ptr->systime = network_stats_ptr->systime - network_stats_diff_ptr->systime;
168			}else{
169
170			network_stats_ptr=network_stats;
171			for(y=0;y<ifaces;y++){
172			if((strcmp(network_stats_diff_ptr->interface_name, network_stats_ptr->interface_name))==0){
173			network_stats_diff_ptr->tx = network_stats_ptr->tx - network_stats_diff_ptr->tx;
174			network_stats_diff_ptr->rx = network_stats_ptr->rx - network_stats_diff_ptr->rx;
175			network_stats_diff_ptr->systime = network_stats_ptr->systime - network_stats_diff_ptr->systime;
176			break;
177			}
178
179			network_stats_ptr++;
180			}
181			}
182
183			network_stats_ptr++;
184			network_stats_diff_ptr++;
185			}
186
187			return network_stats_diff;
188			}
189
190	pajs	1.1
191