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
 *
 * $Id$
 */

#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:	1.23
Committed:	Mon Jan 19 16:49:21 2004 UTC (20 years, 4 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
CVS Tags:	LIBSTATGRAB_0_8_1
Changes since 1.22:	+2 -0 lines
Log Message:	A whole bunch of minor cosmetic changes.
#	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	* $Id$
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 *network_stats_diff=NULL;
259	static int sizeof_net_stats_diff=0;
260	network_stat_t network_stats_ptr, network_stats_diff_ptr;
261	int ifaces, x, y;
262
263	if(network_stats==NULL){
264	network_stats_ptr=get_network_stats(&ifaces);
265	*entries=ifaces;
266	return network_stats_ptr;
267	}
268
269	network_stats_diff=network_stat_malloc(interfaces, &sizeof_net_stats_diff, network_stats_diff);
270	if(network_stats_diff==NULL){
271	return NULL;
272	}
273
274	network_stats_ptr=network_stats;
275	network_stats_diff_ptr=network_stats_diff;
276
277	for(ifaces=0;ifaces<interfaces;ifaces++){
278	if(network_stats_diff_ptr->interface_name!=NULL){
279	free(network_stats_diff_ptr->interface_name);
280	}
281	network_stats_diff_ptr->interface_name=strdup(network_stats_ptr->interface_name);
282	network_stats_diff_ptr->tx=network_stats_ptr->tx;
283	network_stats_diff_ptr->rx=network_stats_ptr->rx;
284	network_stats_diff_ptr->systime=network_stats->systime;
285
286	network_stats_ptr++;
287	network_stats_diff_ptr++;
288	}
289	network_stats_ptr=get_network_stats(&ifaces);
290	if (network_stats_ptr == NULL) {
291	return NULL;
292	}
293	network_stats_diff_ptr=network_stats_diff;
294
295	for(x=0;x<sizeof_net_stats_diff;x++){
296
297	if((strcmp(network_stats_diff_ptr->interface_name, network_stats_ptr->interface_name))==0){
298	network_stats_diff_ptr->tx = transfer_diff(network_stats_ptr->tx, network_stats_diff_ptr->tx);
299	network_stats_diff_ptr->rx = transfer_diff(network_stats_ptr->rx, network_stats_diff_ptr->rx);
300	network_stats_diff_ptr->systime = network_stats_ptr->systime - network_stats_diff_ptr->systime;
301	}else{
302
303	network_stats_ptr=network_stats;
304	for(y=0;y<ifaces;y++){
305	if((strcmp(network_stats_diff_ptr->interface_name, network_stats_ptr->interface_name))==0){
306	network_stats_diff_ptr->tx = transfer_diff(network_stats_ptr->tx, network_stats_diff_ptr->tx);
307	network_stats_diff_ptr->rx = transfer_diff(network_stats_ptr->rx, network_stats_diff_ptr->rx);
308	network_stats_diff_ptr->systime = network_stats_ptr->systime - network_stats_diff_ptr->systime;
309	break;
310	}
311
312	network_stats_ptr++;
313	}
314	}
315
316	network_stats_ptr++;
317	network_stats_diff_ptr++;
318	}
319
320	*entries=sizeof_net_stats_diff;
321	return network_stats_diff;
322	}
323