src/libstatgrab/network_stats.c

/*
 * i-scream central monitoring system
 * http://www.i-scream.org
 * Copyright (C) 2000-2004 i-scream
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; 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
#ifdef ALLBSD
#include <sys/types.h>
#include <sys/socket.h>
#include <ifaddrs.h>
#include <net/if.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 easily big enough */
        char line[8096];
        regex_t regex;
        regmatch_t line_match[4];
#endif
#ifdef ALLBSD
        struct ifaddrs *net, *net_ptr;
        struct if_data *net_data;
#endif

#ifdef ALLBSD
        if(getifaddrs(&net) != 0){
                return NULL;
        }

        interfaces=0;
        
        for(net_ptr=net;net_ptr!=NULL;net_ptr=net_ptr->ifa_next){
                if(net_ptr->ifa_addr->sa_family != AF_LINK) 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=strdup(net_ptr->ifa_name);
                if(network_stat_ptr->interface_name==NULL) return NULL;
                net_data=(struct if_data *)net_ptr->ifa_data;
                network_stat_ptr->rx=net_data->ifi_ibytes;
                network_stat_ptr->tx=net_data->ifi_obytes;                      
                network_stat_ptr->systime=time(NULL);
                interfaces++;
        }
        freeifaddrs(net);       
#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++;
        }
        fclose(f);
        regfree(&regex);

#endif

#ifdef CYGWIN
        return NULL;
#endif

        *entries=interfaces;

        return network_stats;   
}

long long transfer_diff(long long new, long long old){
#if defined(SOL7) || defined(LINUX) || defined(FREEBSD)
#define MAXVAL 4294967296LL
#else
#define MAXVAL 18446744073709551616LL
#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);           
        if (network_stats_ptr == NULL) {
                return NULL;
        }
        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 = transfer_diff(network_stats_ptr->tx, network_stats_diff_ptr->tx);
                        network_stats_diff_ptr->rx = transfer_diff(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 = transfer_diff(network_stats_ptr->tx, network_stats_diff_ptr->tx);
                                        network_stats_diff_ptr->rx = transfer_diff(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:	1.22
Committed:	Fri Jan 16 15:54:54 2004 UTC (20 years, 4 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
Changes since 1.21:	+13 -12 lines
Log Message:	Alter the licensing of libstatgrab. The library part is now under the LGPL, whilst the tools/examples are under the GPL. Both licenses are included in the distribution (and are both now in CVS). Also made a minor alteration to the webpage where it said everything was licensed under the GPL.
#	User	Rev	Content
1	tdb	1.22	/*
2	pajs	1.1	* i-scream central monitoring system
3	tdb	1.15	* http://www.i-scream.org
4	tdb	1.22	* Copyright (C) 2000-2004 i-scream
5	pajs	1.1	*
6	tdb	1.22	* This library is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU Lesser General Public
8			* License as published by the Free Software Foundation; either
9			* version 2.1 of the License, or (at your option) any later version.
10	pajs	1.1	*
11	tdb	1.22	* This library is distributed in the hope that it will be useful,
12	pajs	1.1	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	tdb	1.22	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14			* Lesser General Public License for more details.
15	pajs	1.1	*
16	tdb	1.22	* You should have received a copy of the GNU Lesser General Public
17			* License along with this library; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19			* 02111-1307 USA
20	pajs	1.1	*/
21
22			#ifdef HAVE_CONFIG_H
23			#include "config.h"
24			#endif
25
26	tdb	1.4	#include <stdlib.h>
27	pajs	1.6	#include <string.h>
28	pajs	1.1	#include "statgrab.h"
29	tdb	1.11	#include <time.h>
30	pajs	1.1	#ifdef SOLARIS
31			#include <kstat.h>
32			#include <sys/sysinfo.h>
33	pajs	1.6	#endif
34			#ifdef LINUX
35			#include <stdio.h>
36			#include <sys/types.h>
37			#include <regex.h>
38			#include "tools.h"
39	pajs	1.1	#endif
40	ats	1.18	#ifdef ALLBSD
41	pajs	1.14	#include <sys/types.h>
42			#include <sys/socket.h>
43			#include <ifaddrs.h>
44			#include <net/if.h>
45			#endif
46	pajs	1.1
47	pajs	1.3	static network_stat_t *network_stats=NULL;
48			static int interfaces=0;
49	pajs	1.1
50	pajs	1.3	void network_stat_init(int start, int end, network_stat_t *net_stats){
51
52			for(net_stats+=start; start<end; start++){
53			net_stats->interface_name=NULL;
54			net_stats->tx=0;
55			net_stats->rx=0;
56			net_stats++;
57			}
58			}
59
60			network_stat_t network_stat_malloc(int needed_entries, int cur_entries, network_stat_t *net_stats){
61
62			if(net_stats==NULL){
63
64			if((net_stats=malloc(needed_entries * sizeof(network_stat_t)))==NULL){
65	pajs	1.1	return NULL;
66			}
67	pajs	1.3	network_stat_init(0, needed_entries, net_stats);
68			*cur_entries=needed_entries;
69
70	pajs	1.1	return net_stats;
71			}
72	pajs	1.3
73
74			if(*cur_entries<needed_entries){
75			net_stats=realloc(net_stats, (sizeof(network_stat_t)*needed_entries));
76			if(net_stats==NULL){
77	pajs	1.1	return NULL;
78			}
79	pajs	1.3	network_stat_init(*cur_entries, needed_entries, net_stats);
80			*cur_entries=needed_entries;
81	pajs	1.1	}
82
83			return net_stats;
84			}
85
86	pajs	1.3
87	pajs	1.1	network_stat_t get_network_stats(int entries){
88	pajs	1.6
89			static int sizeof_network_stats=0;
90			network_stat_t *network_stat_ptr;
91
92			#ifdef SOLARIS
93	pajs	1.1	kstat_ctl_t *kc;
94			kstat_t *ksp;
95			kstat_named_t *knp;
96	pajs	1.6	#endif
97	pajs	1.3
98	pajs	1.6	#ifdef LINUX
99			FILE *f;
100	pajs	1.12	/* Horrible big enough, but it should be easily big enough */
101	pajs	1.6	char line[8096];
102			regex_t regex;
103			regmatch_t line_match[4];
104	pajs	1.14	#endif
105	ats	1.18	#ifdef ALLBSD
106	pajs	1.14	struct ifaddrs net, net_ptr;
107			struct if_data *net_data;
108			#endif
109
110	ats	1.18	#ifdef ALLBSD
111	pajs	1.14	if(getifaddrs(&net) != 0){
112			return NULL;
113			}
114
115			interfaces=0;
116
117			for(net_ptr=net;net_ptr!=NULL;net_ptr=net_ptr->ifa_next){
118			if(net_ptr->ifa_addr->sa_family != AF_LINK) continue;
119			network_stats=network_stat_malloc((interfaces+1), &sizeof_network_stats, network_stats);
120			if(network_stats==NULL){
121			return NULL;
122			}
123			network_stat_ptr=network_stats+interfaces;
124
125			if(network_stat_ptr->interface_name!=NULL) free(network_stat_ptr->interface_name);
126			network_stat_ptr->interface_name=strdup(net_ptr->ifa_name);
127			if(network_stat_ptr->interface_name==NULL) return NULL;
128			net_data=(struct if_data *)net_ptr->ifa_data;
129			network_stat_ptr->rx=net_data->ifi_ibytes;
130			network_stat_ptr->tx=net_data->ifi_obytes;
131			network_stat_ptr->systime=time(NULL);
132			interfaces++;
133			}
134			freeifaddrs(net);
135	pajs	1.6	#endif
136	pajs	1.1
137	pajs	1.6	#ifdef SOLARIS
138	pajs	1.1	if ((kc = kstat_open()) == NULL) {
139			return NULL;
140			}
141
142	pajs	1.6	interfaces=0;
143	pajs	1.3
144	pajs	1.1	for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
145			if (!strcmp(ksp->ks_class, "net")) {
146			kstat_read(kc, ksp, NULL);
147
148	pajs	1.7	#ifdef SOL7
149			#define RLOOKUP "rbytes"
150			#define WLOOKUP "obytes"
151			#define VALTYPE value.ui32
152			#else
153			#define RLOOKUP "rbytes64"
154			#define WLOOKUP "obytes64"
155			#define VALTYPE value.ui64
156			#endif
157
158			if((knp=kstat_data_lookup(ksp, RLOOKUP))==NULL){
159	pajs	1.1	/* Not a network interface, so skip to the next entry */
160			continue;
161			}
162	pajs	1.3
163			network_stats=network_stat_malloc((interfaces+1), &sizeof_network_stats, network_stats);
164	pajs	1.1	if(network_stats==NULL){
165			return NULL;
166			}
167			network_stat_ptr=network_stats+interfaces;
168	pajs	1.7	network_stat_ptr->rx=knp->VALTYPE;
169	pajs	1.1
170	pajs	1.7	if((knp=kstat_data_lookup(ksp, WLOOKUP))==NULL){
171	pajs	1.1	/* Not a network interface, so skip to the next entry */
172			continue;
173			}
174	pajs	1.7	network_stat_ptr->tx=knp->VALTYPE;
175	pajs	1.1	if(network_stat_ptr->interface_name!=NULL){
176			free(network_stat_ptr->interface_name);
177			}
178			network_stat_ptr->interface_name=strdup(ksp->ks_name);
179	pajs	1.3
180			network_stat_ptr->systime=time(NULL);
181	pajs	1.1	interfaces++;
182			}
183			}
184	pajs	1.2
185			kstat_close(kc);
186	pajs	1.6	#endif
187			#ifdef LINUX
188			f=fopen("/proc/net/dev", "r");
189			if(f==NULL){
190			return NULL;
191			}
192			/* read the 2 lines.. Its the title, so we dont care :) */
193			fgets(line, sizeof(line), f);
194			fgets(line, sizeof(line), f);
195
196
197			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){
198			return NULL;
199			}
200
201			interfaces=0;
202	pajs	1.1
203	pajs	1.6	while((fgets(line, sizeof(line), f)) != NULL){
204			if((regexec(&regex, line, 4, line_match, 0))!=0){
205			continue;
206			}
207			network_stats=network_stat_malloc((interfaces+1), &sizeof_network_stats, network_stats);
208			if(network_stats==NULL){
209			return NULL;
210			}
211			network_stat_ptr=network_stats+interfaces;
212
213			if(network_stat_ptr->interface_name!=NULL){
214			free(network_stat_ptr->interface_name);
215			}
216
217			network_stat_ptr->interface_name=get_string_match(line, &line_match[1]);
218			network_stat_ptr->rx=get_ll_match(line, &line_match[2]);
219			network_stat_ptr->tx=get_ll_match(line, &line_match[3]);
220			network_stat_ptr->systime=time(NULL);
221
222			interfaces++;
223			}
224	pajs	1.12	fclose(f);
225	pajs	1.13	regfree(&regex);
226	pajs	1.6
227			#endif
228	ats	1.20
229			#ifdef CYGWIN
230			return NULL;
231			#endif
232
233	pajs	1.1	*entries=interfaces;
234
235			return network_stats;
236	pajs	1.3	}
237
238	pajs	1.8	long long transfer_diff(long long new, long long old){
239	pajs	1.17	#if defined(SOL7) \|\| defined(LINUX) \|\| defined(FREEBSD)
240	ats	1.19	#define MAXVAL 4294967296LL
241	pajs	1.8	#else
242	ats	1.19	#define MAXVAL 18446744073709551616LL
243	pajs	1.8	#endif
244			long long result;
245	pajs	1.10	if(new>=old){
246	pajs	1.8	result = (new-old);
247			}else{
248			result = (MAXVAL+(new-old));
249			}
250
251			return result;
252
253			}
254
255	pajs	1.3	network_stat_t get_network_stats_diff(int entries){
256			static network_stat_t *network_stats_diff=NULL;
257			static int sizeof_net_stats_diff=0;
258			network_stat_t network_stats_ptr, network_stats_diff_ptr;
259			int ifaces, x, y;
260
261			if(network_stats==NULL){
262			network_stats_ptr=get_network_stats(&ifaces);
263			*entries=ifaces;
264			return network_stats_ptr;
265			}
266
267			network_stats_diff=network_stat_malloc(interfaces, &sizeof_net_stats_diff, network_stats_diff);
268			if(network_stats_diff==NULL){
269			return NULL;
270			}
271
272			network_stats_ptr=network_stats;
273			network_stats_diff_ptr=network_stats_diff;
274
275			for(ifaces=0;ifaces<interfaces;ifaces++){
276			if(network_stats_diff_ptr->interface_name!=NULL){
277			free(network_stats_diff_ptr->interface_name);
278			}
279			network_stats_diff_ptr->interface_name=strdup(network_stats_ptr->interface_name);
280			network_stats_diff_ptr->tx=network_stats_ptr->tx;
281			network_stats_diff_ptr->rx=network_stats_ptr->rx;
282			network_stats_diff_ptr->systime=network_stats->systime;
283
284			network_stats_ptr++;
285			network_stats_diff_ptr++;
286			}
287			network_stats_ptr=get_network_stats(&ifaces);
288	ats	1.21	if (network_stats_ptr == NULL) {
289			return NULL;
290			}
291	pajs	1.3	network_stats_diff_ptr=network_stats_diff;
292
293			for(x=0;x<sizeof_net_stats_diff;x++){
294
295			if((strcmp(network_stats_diff_ptr->interface_name, network_stats_ptr->interface_name))==0){
296	pajs	1.9	network_stats_diff_ptr->tx = transfer_diff(network_stats_ptr->tx, network_stats_diff_ptr->tx);
297			network_stats_diff_ptr->rx = transfer_diff(network_stats_ptr->rx, network_stats_diff_ptr->rx);
298	pajs	1.3	network_stats_diff_ptr->systime = network_stats_ptr->systime - network_stats_diff_ptr->systime;
299			}else{
300
301			network_stats_ptr=network_stats;
302			for(y=0;y<ifaces;y++){
303			if((strcmp(network_stats_diff_ptr->interface_name, network_stats_ptr->interface_name))==0){
304	pajs	1.9	network_stats_diff_ptr->tx = transfer_diff(network_stats_ptr->tx, network_stats_diff_ptr->tx);
305			network_stats_diff_ptr->rx = transfer_diff(network_stats_ptr->rx, network_stats_diff_ptr->rx);
306	pajs	1.3	network_stats_diff_ptr->systime = network_stats_ptr->systime - network_stats_diff_ptr->systime;
307			break;
308			}
309
310			network_stats_ptr++;
311			}
312			}
313
314			network_stats_ptr++;
315			network_stats_diff_ptr++;
316			}
317
318	pajs	1.5	*entries=sizeof_net_stats_diff;
319	pajs	1.3	return network_stats_diff;
320			}
321	pajs	1.1