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.
#	Content
1	/*
2	* i-scream central monitoring system
3	* http://www.i-scream.org
4	* Copyright (C) 2000-2004 i-scream
5	*
6	* 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	*
11	* This library 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 GNU
14	* Lesser General Public License for more details.
15	*
16	* 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	*
21	* $Id: network_stats.c,v 1.24 2004/01/21 23:46:54 ats Exp $
22	*/
23
24	#ifdef HAVE_CONFIG_H
25	#include "config.h"
26	#endif
27
28	#include <stdlib.h>
29	#include <string.h>
30	#include "statgrab.h"
31	#include <time.h>
32	#ifdef SOLARIS
33	#include <kstat.h>
34	#include <sys/sysinfo.h>
35	#endif
36	#ifdef LINUX
37	#include <stdio.h>
38	#include <sys/types.h>
39	#include <regex.h>
40	#include "tools.h"
41	#endif
42	#ifdef ALLBSD
43	#include <sys/types.h>
44	#include <sys/socket.h>
45	#include <ifaddrs.h>
46	#include <net/if.h>
47	#endif
48
49	static network_stat_t *network_stats=NULL;
50	static int interfaces=0;
51
52	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	return NULL;
68	}
69	network_stat_init(0, needed_entries, net_stats);
70	*cur_entries=needed_entries;
71
72	return net_stats;
73	}
74
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	return NULL;
80	}
81	network_stat_init(*cur_entries, needed_entries, net_stats);
82	*cur_entries=needed_entries;
83	}
84
85	return net_stats;
86	}
87
88
89	network_stat_t get_network_stats(int entries){
90
91	static int sizeof_network_stats=0;
92	network_stat_t *network_stat_ptr;
93
94	#ifdef SOLARIS
95	kstat_ctl_t *kc;
96	kstat_t *ksp;
97	kstat_named_t *knp;
98	#endif
99
100	#ifdef LINUX
101	FILE *f;
102	/* Horrible big enough, but it should be easily big enough */
103	char line[8096];
104	regex_t regex;
105	regmatch_t line_match[4];
106	#endif
107	#ifdef ALLBSD
108	struct ifaddrs net, net_ptr;
109	struct if_data *net_data;
110	#endif
111
112	#ifdef ALLBSD
113	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	#endif
138
139	#ifdef SOLARIS
140	if ((kc = kstat_open()) == NULL) {
141	return NULL;
142	}
143
144	interfaces=0;
145
146	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	#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	/* Not a network interface, so skip to the next entry */
162	continue;
163	}
164
165	network_stats=network_stat_malloc((interfaces+1), &sizeof_network_stats, network_stats);
166	if(network_stats==NULL){
167	return NULL;
168	}
169	network_stat_ptr=network_stats+interfaces;
170	network_stat_ptr->rx=knp->VALTYPE;
171
172	if((knp=kstat_data_lookup(ksp, WLOOKUP))==NULL){
173	/* Not a network interface, so skip to the next entry */
174	continue;
175	}
176	network_stat_ptr->tx=knp->VALTYPE;
177	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
182	network_stat_ptr->systime=time(NULL);
183	interfaces++;
184	}
185	}
186
187	kstat_close(kc);
188	#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
205	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	fclose(f);
227	regfree(&regex);
228
229	#endif
230
231	#ifdef CYGWIN
232	return NULL;
233	#endif
234
235	*entries=interfaces;
236
237	return network_stats;
238	}
239
240	long long transfer_diff(long long new, long long old){
241	#if defined(SOL7) \|\| defined(LINUX) \|\| defined(FREEBSD)
242	#define MAXVAL 4294967296LL
243	#else
244	#define MAXVAL 18446744073709551616LL
245	#endif
246	long long result;
247	if(new>=old){
248	result = (new-old);
249	}else{
250	result = (MAXVAL+(new-old));
251	}
252
253	return result;
254
255	}
256
257	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	}
267
268	/* Resize the results array to match the previous stats. */
269	diff = network_stat_malloc(interfaces, &diff_count, diff);
270	if (diff == NULL) {
271	return NULL;
272	}
273
274	/* 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
279	if (dest->interface_name != NULL) {
280	free(dest->interface_name);
281	}
282	dest->interface_name = strdup(src->interface_name);
283	dest->rx = src->rx;
284	dest->tx = src->tx;
285	dest->systime = src->systime;
286	}
287
288	/* Get a new set of stats. */
289	if (get_network_stats(&new_count) == NULL) {
290	return NULL;
291	}
292
293	/* 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	}
310
311	/* ... 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	}
317
318	*entries = diff_count;
319	return diff;
320	}
321	/* 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