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 <stdlib.h>
#include <string.h>
#include "statgrab.h"
#include "time.h"
#ifdef SOLARIS
#include <kstat.h>
#include <sys/sysinfo.h>
#endif
#ifdef LINUX
#include <stdio.h>
#include <sys/types.h>
#include <regex.h>
#include "tools.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){

        static int sizeof_network_stats=0;      
        network_stat_t *network_stat_ptr;

#ifdef SOLARIS
        kstat_ctl_t *kc;
        kstat_t *ksp;
        kstat_named_t *knp;
#endif

#ifdef LINUX
        FILE *f;
        /* Horrible big enough, but it should be quite easily */
        char line[8096];
        regex_t regex;
        regmatch_t line_match[4];
#endif

#ifdef SOLARIS
        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);

#ifdef SOL7
#define RLOOKUP "rbytes"
#define WLOOKUP "obytes"
#define VALTYPE value.ui32
#else
#define RLOOKUP "rbytes64"
#define WLOOKUP "obytes64"
#define VALTYPE value.ui64
#endif

                        if((knp=kstat_data_lookup(ksp, RLOOKUP))==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->VALTYPE;

                        if((knp=kstat_data_lookup(ksp, WLOOKUP))==NULL){
                                /* Not a network interface, so skip to the next entry */
                                continue;
                        }
                        network_stat_ptr->tx=knp->VALTYPE;
                        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);        
#endif
#ifdef LINUX
        f=fopen("/proc/net/dev", "r");
        if(f==NULL){
                return NULL;
        }
        /* read the 2 lines.. Its the title, so we dont care :) */
        fgets(line, sizeof(line), f);
        fgets(line, sizeof(line), f);


        if((regcomp(&regex, "^[[:space:]]*([^:]+):[[:space:]]*([[:digit:]]+)[[:space:]]+[[:digit:]]+[[:space:]]+[[:digit:]]+[[:space:]]+[[:digit:]]+[[:space:]]+[[:digit:]]+[[:space:]]+[[:digit:]]+[[:space:]]+[[:digit:]]+[[:space:]]+[[:digit:]]+[[:space:]]+([[:digit:]]+)", REG_EXTENDED))!=0){
                return NULL;
        }

        interfaces=0;

        while((fgets(line, sizeof(line), f)) != NULL){
                if((regexec(&regex, line, 4, line_match, 0))!=0){
                        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;

                if(network_stat_ptr->interface_name!=NULL){
                        free(network_stat_ptr->interface_name);
                }

                network_stat_ptr->interface_name=get_string_match(line, &line_match[1]);
                network_stat_ptr->rx=get_ll_match(line, &line_match[2]);
                network_stat_ptr->tx=get_ll_match(line, &line_match[3]);
                network_stat_ptr->systime=time(NULL);

                interfaces++;
        }

#endif
        *entries=interfaces;

        return network_stats;   
}

long long transfer_diff(long long new, long long old){
#ifdef SOL7 
#define MAXVAL 4294967296
#else
#define MAXVAL 18446744073709551616
#endif
        long long result;
        if(new>old){
                result = (new-old);
        }else{
                result = (MAXVAL+(new-old));
        }

        return result;

}

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++;
        }

        *entries=sizeof_net_stats_diff;
        return network_stats_diff;
}       

Revision:	1.8
Committed:	Tue Mar 11 16:16:20 2003 UTC (21 years, 2 months ago) by pajs
Content type:	text/plain
Branch:	MAIN
CVS Tags:	LIBSTATGRAB_0_3_1
Changes since 1.7:	+17 -0 lines
Log Message:	Ok, wrap around fixed for 32bit machines, not 64. I really ought to change all the long long's to ulong long's. I'll ponder if i can be bothered :)
#	Content
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 <stdlib.h>
26	#include <string.h>
27	#include "statgrab.h"
28	#include "time.h"
29	#ifdef SOLARIS
30	#include <kstat.h>
31	#include <sys/sysinfo.h>
32	#endif
33	#ifdef LINUX
34	#include <stdio.h>
35	#include <sys/types.h>
36	#include <regex.h>
37	#include "tools.h"
38	#endif
39
40	static network_stat_t *network_stats=NULL;
41	static int interfaces=0;
42
43	void network_stat_init(int start, int end, network_stat_t *net_stats){
44
45	for(net_stats+=start; start<end; start++){
46	net_stats->interface_name=NULL;
47	net_stats->tx=0;
48	net_stats->rx=0;
49	net_stats++;
50	}
51	}
52
53	network_stat_t network_stat_malloc(int needed_entries, int cur_entries, network_stat_t *net_stats){
54
55	if(net_stats==NULL){
56
57	if((net_stats=malloc(needed_entries * sizeof(network_stat_t)))==NULL){
58	return NULL;
59	}
60	network_stat_init(0, needed_entries, net_stats);
61	*cur_entries=needed_entries;
62
63	return net_stats;
64	}
65
66
67	if(*cur_entries<needed_entries){
68	net_stats=realloc(net_stats, (sizeof(network_stat_t)*needed_entries));
69	if(net_stats==NULL){
70	return NULL;
71	}
72	network_stat_init(*cur_entries, needed_entries, net_stats);
73	*cur_entries=needed_entries;
74	}
75
76	return net_stats;
77	}
78
79
80	network_stat_t get_network_stats(int entries){
81
82	static int sizeof_network_stats=0;
83	network_stat_t *network_stat_ptr;
84
85	#ifdef SOLARIS
86	kstat_ctl_t *kc;
87	kstat_t *ksp;
88	kstat_named_t *knp;
89	#endif
90
91	#ifdef LINUX
92	FILE *f;
93	/* Horrible big enough, but it should be quite easily */
94	char line[8096];
95	regex_t regex;
96	regmatch_t line_match[4];
97	#endif
98
99	#ifdef SOLARIS
100	if ((kc = kstat_open()) == NULL) {
101	return NULL;
102	}
103
104	interfaces=0;
105
106	for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
107	if (!strcmp(ksp->ks_class, "net")) {
108	kstat_read(kc, ksp, NULL);
109
110	#ifdef SOL7
111	#define RLOOKUP "rbytes"
112	#define WLOOKUP "obytes"
113	#define VALTYPE value.ui32
114	#else
115	#define RLOOKUP "rbytes64"
116	#define WLOOKUP "obytes64"
117	#define VALTYPE value.ui64
118	#endif
119
120	if((knp=kstat_data_lookup(ksp, RLOOKUP))==NULL){
121	/* Not a network interface, so skip to the next entry */
122	continue;
123	}
124
125	network_stats=network_stat_malloc((interfaces+1), &sizeof_network_stats, network_stats);
126	if(network_stats==NULL){
127	return NULL;
128	}
129	network_stat_ptr=network_stats+interfaces;
130	network_stat_ptr->rx=knp->VALTYPE;
131
132	if((knp=kstat_data_lookup(ksp, WLOOKUP))==NULL){
133	/* Not a network interface, so skip to the next entry */
134	continue;
135	}
136	network_stat_ptr->tx=knp->VALTYPE;
137	if(network_stat_ptr->interface_name!=NULL){
138	free(network_stat_ptr->interface_name);
139	}
140	network_stat_ptr->interface_name=strdup(ksp->ks_name);
141
142	network_stat_ptr->systime=time(NULL);
143	interfaces++;
144	}
145	}
146
147	kstat_close(kc);
148	#endif
149	#ifdef LINUX
150	f=fopen("/proc/net/dev", "r");
151	if(f==NULL){
152	return NULL;
153	}
154	/* read the 2 lines.. Its the title, so we dont care :) */
155	fgets(line, sizeof(line), f);
156	fgets(line, sizeof(line), f);
157
158
159	if((regcomp(&regex, "^[[:space:]]([^:]+):[[:space:]]([[:digit:]]+)[[:space:]]+[[:digit:]]+[[:space:]]+[[:digit:]]+[[:space:]]+[[:digit:]]+[[:space:]]+[[:digit:]]+[[:space:]]+[[:digit:]]+[[:space:]]+[[:digit:]]+[[:space:]]+[[:digit:]]+[[:space:]]+([[:digit:]]+)", REG_EXTENDED))!=0){
160	return NULL;
161	}
162
163	interfaces=0;
164
165	while((fgets(line, sizeof(line), f)) != NULL){
166	if((regexec(&regex, line, 4, line_match, 0))!=0){
167	continue;
168	}
169	network_stats=network_stat_malloc((interfaces+1), &sizeof_network_stats, network_stats);
170	if(network_stats==NULL){
171	return NULL;
172	}
173	network_stat_ptr=network_stats+interfaces;
174
175	if(network_stat_ptr->interface_name!=NULL){
176	free(network_stat_ptr->interface_name);
177	}
178
179	network_stat_ptr->interface_name=get_string_match(line, &line_match[1]);
180	network_stat_ptr->rx=get_ll_match(line, &line_match[2]);
181	network_stat_ptr->tx=get_ll_match(line, &line_match[3]);
182	network_stat_ptr->systime=time(NULL);
183
184	interfaces++;
185	}
186
187	#endif
188	*entries=interfaces;
189
190	return network_stats;
191	}
192
193	long long transfer_diff(long long new, long long old){
194	#ifdef SOL7
195	#define MAXVAL 4294967296
196	#else
197	#define MAXVAL 18446744073709551616
198	#endif
199	long long result;
200	if(new>old){
201	result = (new-old);
202	}else{
203	result = (MAXVAL+(new-old));
204	}
205
206	return result;
207
208	}
209
210	network_stat_t get_network_stats_diff(int entries){
211	static network_stat_t *network_stats_diff=NULL;
212	static int sizeof_net_stats_diff=0;
213	network_stat_t network_stats_ptr, network_stats_diff_ptr;
214	int ifaces, x, y;
215
216	if(network_stats==NULL){
217	network_stats_ptr=get_network_stats(&ifaces);
218	*entries=ifaces;
219	return network_stats_ptr;
220	}
221
222	network_stats_diff=network_stat_malloc(interfaces, &sizeof_net_stats_diff, network_stats_diff);
223	if(network_stats_diff==NULL){
224	return NULL;
225	}
226
227	network_stats_ptr=network_stats;
228	network_stats_diff_ptr=network_stats_diff;
229
230	for(ifaces=0;ifaces<interfaces;ifaces++){
231	if(network_stats_diff_ptr->interface_name!=NULL){
232	free(network_stats_diff_ptr->interface_name);
233	}
234	network_stats_diff_ptr->interface_name=strdup(network_stats_ptr->interface_name);
235	network_stats_diff_ptr->tx=network_stats_ptr->tx;
236	network_stats_diff_ptr->rx=network_stats_ptr->rx;
237	network_stats_diff_ptr->systime=network_stats->systime;
238
239	network_stats_ptr++;
240	network_stats_diff_ptr++;
241	}
242	network_stats_ptr=get_network_stats(&ifaces);
243	network_stats_diff_ptr=network_stats_diff;
244
245	for(x=0;x<sizeof_net_stats_diff;x++){
246
247	if((strcmp(network_stats_diff_ptr->interface_name, network_stats_ptr->interface_name))==0){
248	network_stats_diff_ptr->tx = network_stats_ptr->tx - network_stats_diff_ptr->tx;
249	network_stats_diff_ptr->rx = network_stats_ptr->rx - network_stats_diff_ptr->rx;
250	network_stats_diff_ptr->systime = network_stats_ptr->systime - network_stats_diff_ptr->systime;
251	}else{
252
253	network_stats_ptr=network_stats;
254	for(y=0;y<ifaces;y++){
255	if((strcmp(network_stats_diff_ptr->interface_name, network_stats_ptr->interface_name))==0){
256	network_stats_diff_ptr->tx = network_stats_ptr->tx - network_stats_diff_ptr->tx;
257	network_stats_diff_ptr->rx = network_stats_ptr->rx - network_stats_diff_ptr->rx;
258	network_stats_diff_ptr->systime = network_stats_ptr->systime - network_stats_diff_ptr->systime;
259	break;
260	}
261
262	network_stats_ptr++;
263	}
264	}
265
266	network_stats_ptr++;
267	network_stats_diff_ptr++;
268	}
269
270	*entries=sizeof_net_stats_diff;
271	return network_stats_diff;
272	}
273