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.
#	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
22	#ifdef HAVE_CONFIG_H
23	#include "config.h"
24	#endif
25
26	#include <stdlib.h>
27	#include <string.h>
28	#include "statgrab.h"
29	#include <time.h>
30	#ifdef SOLARIS
31	#include <kstat.h>
32	#include <sys/sysinfo.h>
33	#endif
34	#ifdef LINUX
35	#include <stdio.h>
36	#include <sys/types.h>
37	#include <regex.h>
38	#include "tools.h"
39	#endif
40	#ifdef ALLBSD
41	#include <sys/types.h>
42	#include <sys/socket.h>
43	#include <ifaddrs.h>
44	#include <net/if.h>
45	#endif
46
47	static network_stat_t *network_stats=NULL;
48	static int interfaces=0;
49
50	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	return NULL;
66	}
67	network_stat_init(0, needed_entries, net_stats);
68	*cur_entries=needed_entries;
69
70	return net_stats;
71	}
72
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	return NULL;
78	}
79	network_stat_init(*cur_entries, needed_entries, net_stats);
80	*cur_entries=needed_entries;
81	}
82
83	return net_stats;
84	}
85
86
87	network_stat_t get_network_stats(int entries){
88
89	static int sizeof_network_stats=0;
90	network_stat_t *network_stat_ptr;
91
92	#ifdef SOLARIS
93	kstat_ctl_t *kc;
94	kstat_t *ksp;
95	kstat_named_t *knp;
96	#endif
97
98	#ifdef LINUX
99	FILE *f;
100	/* Horrible big enough, but it should be easily big enough */
101	char line[8096];
102	regex_t regex;
103	regmatch_t line_match[4];
104	#endif
105	#ifdef ALLBSD
106	struct ifaddrs net, net_ptr;
107	struct if_data *net_data;
108	#endif
109
110	#ifdef ALLBSD
111	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	#endif
136
137	#ifdef SOLARIS
138	if ((kc = kstat_open()) == NULL) {
139	return NULL;
140	}
141
142	interfaces=0;
143
144	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	#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	/* Not a network interface, so skip to the next entry */
160	continue;
161	}
162
163	network_stats=network_stat_malloc((interfaces+1), &sizeof_network_stats, network_stats);
164	if(network_stats==NULL){
165	return NULL;
166	}
167	network_stat_ptr=network_stats+interfaces;
168	network_stat_ptr->rx=knp->VALTYPE;
169
170	if((knp=kstat_data_lookup(ksp, WLOOKUP))==NULL){
171	/* Not a network interface, so skip to the next entry */
172	continue;
173	}
174	network_stat_ptr->tx=knp->VALTYPE;
175	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
180	network_stat_ptr->systime=time(NULL);
181	interfaces++;
182	}
183	}
184
185	kstat_close(kc);
186	#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
203	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	fclose(f);
225	regfree(&regex);
226
227	#endif
228
229	#ifdef CYGWIN
230	return NULL;
231	#endif
232
233	*entries=interfaces;
234
235	return network_stats;
236	}
237
238	long long transfer_diff(long long new, long long old){
239	#if defined(SOL7) \|\| defined(LINUX) \|\| defined(FREEBSD)
240	#define MAXVAL 4294967296LL
241	#else
242	#define MAXVAL 18446744073709551616LL
243	#endif
244	long long result;
245	if(new>=old){
246	result = (new-old);
247	}else{
248	result = (MAXVAL+(new-old));
249	}
250
251	return result;
252
253	}
254
255	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	if (network_stats_ptr == NULL) {
289	return NULL;
290	}
291	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	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	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	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	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	*entries=sizeof_net_stats_diff;
319	return network_stats_diff;
320	}
321