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
 *
 * $Id: network_stats.c,v 1.24 2004/01/21 23:46:54 ats Exp $
 */

#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 *diff = NULL;
        static int diff_count = 0;
        network_stat_t *src, *dest;
        int i, j, new_count;

        if (network_stats == NULL) {
                /* No previous stats, so we can't calculate a difference. */
                return get_network_stats(entries);
        }

        /* Resize the results array to match the previous stats. */
        diff = network_stat_malloc(interfaces, &diff_count, diff);
        if (diff == NULL) {
                return NULL;
        }

        /* Copy the previous stats into the result. */
        for (i = 0; i < diff_count; i++) {
                src = &network_stats[i];
                dest = &diff[i];

                if (dest->interface_name != NULL) {
                        free(dest->interface_name);
                }
                dest->interface_name = strdup(src->interface_name);
                dest->rx = src->rx;
                dest->tx = src->tx;
                dest->systime = src->systime;
        }

        /* Get a new set of stats. */
        if (get_network_stats(&new_count) == NULL) {
                return NULL;
        }

        /* For each previous stat... */
        for (i = 0; i < diff_count; i++) {
                dest = &diff[i];

                /* ... find the corresponding new stat ... */
                for (j = 0; j < new_count; j++) {
                        /* Try the new stat in the same position first,
                           since that's most likely to be it. */
                        src = &network_stats[(i + j) % new_count];
                        if (strcmp(src->interface_name, dest->interface_name) == 0) {
                                break;
                        }
                }
                if (j == new_count) {
                        /* No match found. */
                        continue;
                }

                /* ... and subtract the previous stat from it to get the
                   difference. */
                dest->rx = transfer_diff(src->rx, dest->rx);
                dest->tx = transfer_diff(src->tx, dest->tx);
                dest->systime = src->systime - dest->systime;
        }

        *entries = diff_count;
        return diff;
}
/* NETWORK INTERFACE STATS */

void network_iface_stat_init(int start, int end, network_iface_stat_t *net_stats){

        for(net_stats+=start; start<end; start++){
                net_stats->interface_name=NULL;
                net_stats->speed=0;
                net_stats->dup=NO_DUPLEX;
                net_stats++;
        }
}

network_iface_stat_t *network_iface_stat_malloc(int needed_entries, int *cur_entries, network_iface_stat_t *net_stats){

        if(net_stats==NULL){

                if((net_stats=malloc(needed_entries * sizeof(network_iface_stat_t)))==NULL){
                        return NULL;
                }
                network_iface_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_iface_stat_t)*needed_entries));
                if(net_stats==NULL){
                        return NULL;
                }
                network_iface_stat_init(*cur_entries, needed_entries, net_stats);
                *cur_entries=needed_entries;
        }

        return net_stats;
}

network_iface_stat_t *get_network_iface_stats(int *entries){
        static network_iface_stat_t *network_iface_stats;
        network_iface_stat_t *network_iface_stat_ptr;
        static int sizeof_network_iface_stats=0;        
        int ifaces;

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

#ifdef SOLARIS
        if ((kc = kstat_open()) == NULL) {
                return NULL;
        }

        ifaces=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, "ifspeed"))==NULL){
                                /* Not a network interface, so skip to the next entry */
                                continue;
                        }
                        network_iface_stats=network_iface_stat_malloc((ifaces+1), &sizeof_network_iface_stats, network_iface_stats);
                        if(network_iface_stats==NULL){
                                return NULL;
                        }
                        network_iface_stat_ptr = network_iface_stats + interfaces;
                        network_iface_stat_ptr->speed = knp->value.ui64 / (1000*1000);

                        if((knp=kstat_data_lookup(ksp, "link_duplex"))==NULL){
                                /* Not a network interface, so skip to the next entry */
                                continue;
                        }

                        if(knp->value.ui64 == 0){
                                network_iface_stat_ptr->dup = FULL_DUPLEX;
                        }else{
                                network_iface_stat_ptr->dup = HALF_DUPLEX;
                        }

                        network_iface_stat_ptr->interface_name = strdup(ksp->ks_name);
                        interfaces++;
                }
        }
        kstat_close(kc);
        
#endif  
        *entries = interfaces;
        return network_iface_stats; 
}

Revision:	1.25
Committed:	Fri Jan 23 23:23:33 2004 UTC (20 years, 3 months ago) by pajs
Content type:	text/plain
Branch:	MAIN
Changes since 1.24:	+94 -1 lines
Log Message:	Added the ability to get the interface speed/duplex for solaris. Not really checked code, but it appears to work.
#	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	tdb	1.23	*
21	pajs	1.25	* $Id: network_stats.c,v 1.24 2004/01/21 23:46:54 ats Exp $
22	pajs	1.1	*/
23
24			#ifdef HAVE_CONFIG_H
25			#include "config.h"
26			#endif
27
28	tdb	1.4	#include <stdlib.h>
29	pajs	1.6	#include <string.h>
30	pajs	1.1	#include "statgrab.h"
31	tdb	1.11	#include <time.h>
32	pajs	1.1	#ifdef SOLARIS
33			#include <kstat.h>
34			#include <sys/sysinfo.h>
35	pajs	1.6	#endif
36			#ifdef LINUX
37			#include <stdio.h>
38			#include <sys/types.h>
39			#include <regex.h>
40			#include "tools.h"
41	pajs	1.1	#endif
42	ats	1.18	#ifdef ALLBSD
43	pajs	1.14	#include <sys/types.h>
44			#include <sys/socket.h>
45			#include <ifaddrs.h>
46			#include <net/if.h>
47			#endif
48	pajs	1.1
49	pajs	1.3	static network_stat_t *network_stats=NULL;
50			static int interfaces=0;
51	pajs	1.1
52	pajs	1.3	void network_stat_init(int start, int end, network_stat_t *net_stats){
53
54			for(net_stats+=start; start<end; start++){
55			net_stats->interface_name=NULL;
56			net_stats->tx=0;
57			net_stats->rx=0;
58			net_stats++;
59			}
60			}
61
62			network_stat_t network_stat_malloc(int needed_entries, int cur_entries, network_stat_t *net_stats){
63
64			if(net_stats==NULL){
65
66			if((net_stats=malloc(needed_entries * sizeof(network_stat_t)))==NULL){
67	pajs	1.1	return NULL;
68			}
69	pajs	1.3	network_stat_init(0, needed_entries, net_stats);
70			*cur_entries=needed_entries;
71
72	pajs	1.1	return net_stats;
73			}
74	pajs	1.3
75
76			if(*cur_entries<needed_entries){
77			net_stats=realloc(net_stats, (sizeof(network_stat_t)*needed_entries));
78			if(net_stats==NULL){
79	pajs	1.1	return NULL;
80			}
81	pajs	1.3	network_stat_init(*cur_entries, needed_entries, net_stats);
82			*cur_entries=needed_entries;
83	pajs	1.1	}
84
85			return net_stats;
86			}
87
88	pajs	1.3
89	pajs	1.1	network_stat_t get_network_stats(int entries){
90	pajs	1.6
91			static int sizeof_network_stats=0;
92			network_stat_t *network_stat_ptr;
93
94			#ifdef SOLARIS
95	pajs	1.1	kstat_ctl_t *kc;
96			kstat_t *ksp;
97			kstat_named_t *knp;
98	pajs	1.6	#endif
99	pajs	1.3
100	pajs	1.6	#ifdef LINUX
101			FILE *f;
102	pajs	1.12	/* Horrible big enough, but it should be easily big enough */
103	pajs	1.6	char line[8096];
104			regex_t regex;
105			regmatch_t line_match[4];
106	pajs	1.14	#endif
107	ats	1.18	#ifdef ALLBSD
108	pajs	1.14	struct ifaddrs net, net_ptr;
109			struct if_data *net_data;
110			#endif
111
112	ats	1.18	#ifdef ALLBSD
113	pajs	1.14	if(getifaddrs(&net) != 0){
114			return NULL;
115			}
116
117			interfaces=0;
118
119			for(net_ptr=net;net_ptr!=NULL;net_ptr=net_ptr->ifa_next){
120			if(net_ptr->ifa_addr->sa_family != AF_LINK) continue;
121			network_stats=network_stat_malloc((interfaces+1), &sizeof_network_stats, network_stats);
122			if(network_stats==NULL){
123			return NULL;
124			}
125			network_stat_ptr=network_stats+interfaces;
126
127			if(network_stat_ptr->interface_name!=NULL) free(network_stat_ptr->interface_name);
128			network_stat_ptr->interface_name=strdup(net_ptr->ifa_name);
129			if(network_stat_ptr->interface_name==NULL) return NULL;
130			net_data=(struct if_data *)net_ptr->ifa_data;
131			network_stat_ptr->rx=net_data->ifi_ibytes;
132			network_stat_ptr->tx=net_data->ifi_obytes;
133			network_stat_ptr->systime=time(NULL);
134			interfaces++;
135			}
136			freeifaddrs(net);
137	pajs	1.6	#endif
138	pajs	1.1
139	pajs	1.6	#ifdef SOLARIS
140	pajs	1.1	if ((kc = kstat_open()) == NULL) {
141			return NULL;
142			}
143
144	pajs	1.6	interfaces=0;
145	pajs	1.3
146	pajs	1.1	for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
147			if (!strcmp(ksp->ks_class, "net")) {
148			kstat_read(kc, ksp, NULL);
149
150	pajs	1.7	#ifdef SOL7
151			#define RLOOKUP "rbytes"
152			#define WLOOKUP "obytes"
153			#define VALTYPE value.ui32
154			#else
155			#define RLOOKUP "rbytes64"
156			#define WLOOKUP "obytes64"
157			#define VALTYPE value.ui64
158			#endif
159
160			if((knp=kstat_data_lookup(ksp, RLOOKUP))==NULL){
161	pajs	1.1	/* Not a network interface, so skip to the next entry */
162			continue;
163			}
164	pajs	1.3
165			network_stats=network_stat_malloc((interfaces+1), &sizeof_network_stats, network_stats);
166	pajs	1.1	if(network_stats==NULL){
167			return NULL;
168			}
169			network_stat_ptr=network_stats+interfaces;
170	pajs	1.7	network_stat_ptr->rx=knp->VALTYPE;
171	pajs	1.1
172	pajs	1.7	if((knp=kstat_data_lookup(ksp, WLOOKUP))==NULL){
173	pajs	1.1	/* Not a network interface, so skip to the next entry */
174			continue;
175			}
176	pajs	1.7	network_stat_ptr->tx=knp->VALTYPE;
177	pajs	1.1	if(network_stat_ptr->interface_name!=NULL){
178			free(network_stat_ptr->interface_name);
179			}
180			network_stat_ptr->interface_name=strdup(ksp->ks_name);
181	pajs	1.3
182			network_stat_ptr->systime=time(NULL);
183	pajs	1.1	interfaces++;
184			}
185			}
186	pajs	1.2
187			kstat_close(kc);
188	pajs	1.6	#endif
189			#ifdef LINUX
190			f=fopen("/proc/net/dev", "r");
191			if(f==NULL){
192			return NULL;
193			}
194			/* read the 2 lines.. Its the title, so we dont care :) */
195			fgets(line, sizeof(line), f);
196			fgets(line, sizeof(line), f);
197
198
199			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){
200			return NULL;
201			}
202
203			interfaces=0;
204	pajs	1.1
205	pajs	1.6	while((fgets(line, sizeof(line), f)) != NULL){
206			if((regexec(&regex, line, 4, line_match, 0))!=0){
207			continue;
208			}
209			network_stats=network_stat_malloc((interfaces+1), &sizeof_network_stats, network_stats);
210			if(network_stats==NULL){
211			return NULL;
212			}
213			network_stat_ptr=network_stats+interfaces;
214
215			if(network_stat_ptr->interface_name!=NULL){
216			free(network_stat_ptr->interface_name);
217			}
218
219			network_stat_ptr->interface_name=get_string_match(line, &line_match[1]);
220			network_stat_ptr->rx=get_ll_match(line, &line_match[2]);
221			network_stat_ptr->tx=get_ll_match(line, &line_match[3]);
222			network_stat_ptr->systime=time(NULL);
223
224			interfaces++;
225			}
226	pajs	1.12	fclose(f);
227	pajs	1.13	regfree(&regex);
228	pajs	1.6
229			#endif
230	ats	1.20
231			#ifdef CYGWIN
232			return NULL;
233			#endif
234
235	pajs	1.1	*entries=interfaces;
236
237			return network_stats;
238	pajs	1.3	}
239
240	pajs	1.8	long long transfer_diff(long long new, long long old){
241	pajs	1.17	#if defined(SOL7) \|\| defined(LINUX) \|\| defined(FREEBSD)
242	ats	1.19	#define MAXVAL 4294967296LL
243	pajs	1.8	#else
244	ats	1.19	#define MAXVAL 18446744073709551616LL
245	pajs	1.8	#endif
246			long long result;
247	pajs	1.10	if(new>=old){
248	pajs	1.8	result = (new-old);
249			}else{
250			result = (MAXVAL+(new-old));
251			}
252
253			return result;
254
255			}
256
257	ats	1.24	network_stat_t get_network_stats_diff(int entries) {
258			static network_stat_t *diff = NULL;
259			static int diff_count = 0;
260			network_stat_t src, dest;
261			int i, j, new_count;
262
263			if (network_stats == NULL) {
264			/* No previous stats, so we can't calculate a difference. */
265			return get_network_stats(entries);
266	pajs	1.3	}
267
268	ats	1.24	/* Resize the results array to match the previous stats. */
269			diff = network_stat_malloc(interfaces, &diff_count, diff);
270			if (diff == NULL) {
271	pajs	1.3	return NULL;
272			}
273
274	ats	1.24	/* Copy the previous stats into the result. */
275			for (i = 0; i < diff_count; i++) {
276			src = &network_stats[i];
277			dest = &diff[i];
278	pajs	1.3
279	ats	1.24	if (dest->interface_name != NULL) {
280			free(dest->interface_name);
281	pajs	1.3	}
282	ats	1.24	dest->interface_name = strdup(src->interface_name);
283			dest->rx = src->rx;
284			dest->tx = src->tx;
285			dest->systime = src->systime;
286			}
287	pajs	1.3
288	ats	1.24	/* Get a new set of stats. */
289			if (get_network_stats(&new_count) == NULL) {
290	ats	1.21	return NULL;
291			}
292	pajs	1.3
293	ats	1.24	/* For each previous stat... */
294			for (i = 0; i < diff_count; i++) {
295			dest = &diff[i];
296
297			/* ... find the corresponding new stat ... */
298			for (j = 0; j < new_count; j++) {
299			/* Try the new stat in the same position first,
300			since that's most likely to be it. */
301			src = &network_stats[(i + j) % new_count];
302			if (strcmp(src->interface_name, dest->interface_name) == 0) {
303			break;
304			}
305			}
306			if (j == new_count) {
307			/* No match found. */
308			continue;
309	pajs	1.3	}
310
311	ats	1.24	/* ... and subtract the previous stat from it to get the
312			difference. */
313			dest->rx = transfer_diff(src->rx, dest->rx);
314			dest->tx = transfer_diff(src->tx, dest->tx);
315			dest->systime = src->systime - dest->systime;
316	pajs	1.3	}
317
318	ats	1.24	*entries = diff_count;
319			return diff;
320			}
321	pajs	1.25	/* NETWORK INTERFACE STATS */
322
323			void network_iface_stat_init(int start, int end, network_iface_stat_t *net_stats){
324
325			for(net_stats+=start; start<end; start++){
326			net_stats->interface_name=NULL;
327			net_stats->speed=0;
328			net_stats->dup=NO_DUPLEX;
329			net_stats++;
330			}
331			}
332
333			network_iface_stat_t network_iface_stat_malloc(int needed_entries, int cur_entries, network_iface_stat_t *net_stats){
334
335			if(net_stats==NULL){
336
337			if((net_stats=malloc(needed_entries * sizeof(network_iface_stat_t)))==NULL){
338			return NULL;
339			}
340			network_iface_stat_init(0, needed_entries, net_stats);
341			*cur_entries=needed_entries;
342
343			return net_stats;
344			}
345
346
347			if(*cur_entries<needed_entries){
348			net_stats=realloc(net_stats, (sizeof(network_iface_stat_t)*needed_entries));
349			if(net_stats==NULL){
350			return NULL;
351			}
352			network_iface_stat_init(*cur_entries, needed_entries, net_stats);
353			*cur_entries=needed_entries;
354			}
355
356			return net_stats;
357			}
358
359			network_iface_stat_t get_network_iface_stats(int entries){
360			static network_iface_stat_t *network_iface_stats;
361			network_iface_stat_t *network_iface_stat_ptr;
362			static int sizeof_network_iface_stats=0;
363			int ifaces;
364
365			#ifdef SOLARIS
366			kstat_ctl_t *kc;
367			kstat_t *ksp;
368			kstat_named_t *knp;
369			#endif
370
371			#ifdef SOLARIS
372			if ((kc = kstat_open()) == NULL) {
373			return NULL;
374			}
375
376			ifaces=0;
377
378			for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
379			if (!strcmp(ksp->ks_class, "net")) {
380			kstat_read(kc, ksp, NULL);
381			if((knp=kstat_data_lookup(ksp, "ifspeed"))==NULL){
382			/* Not a network interface, so skip to the next entry */
383			continue;
384			}
385			network_iface_stats=network_iface_stat_malloc((ifaces+1), &sizeof_network_iface_stats, network_iface_stats);
386			if(network_iface_stats==NULL){
387			return NULL;
388			}
389			network_iface_stat_ptr = network_iface_stats + interfaces;
390			network_iface_stat_ptr->speed = knp->value.ui64 / (1000*1000);
391
392			if((knp=kstat_data_lookup(ksp, "link_duplex"))==NULL){
393			/* Not a network interface, so skip to the next entry */
394			continue;
395			}
396
397			if(knp->value.ui64 == 0){
398			network_iface_stat_ptr->dup = FULL_DUPLEX;
399			}else{
400			network_iface_stat_ptr->dup = HALF_DUPLEX;
401			}
402
403			network_iface_stat_ptr->interface_name = strdup(ksp->ks_name);
404			interfaces++;
405			}
406			}
407			kstat_close(kc);
408
409			#endif
410			*entries = interfaces;
411			return network_iface_stats;
412			}
413