src/libstatgrab/network_stats.c

/* 
 * i-scream central monitoring system
 * http://www.i-scream.org.uk
 * Copyright (C) 2000-2002 i-scream
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; 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

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 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
        *entries=interfaces;

        return network_stats;   
}

long long transfer_diff(long long new, long long old){
#ifdef SOL7 
#define MAXVAL 4294967296
#else
#define MAXVAL 18446744073709551616
#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);           
        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:	1.13
Committed:	Mon Mar 31 13:24:12 2003 UTC (21 years, 1 month ago) by pajs
Content type:	text/plain
Branch:	MAIN
CVS Tags:	LIBSTATGRAB_0_3_4
Changes since 1.12:	+1 -0 lines
Log Message:	Fixed memory leak in regex stuff
#	User	Rev	Content
1	pajs	1.1	/*
2			* i-scream central monitoring system
3			* http://www.i-scream.org.uk
4			* Copyright (C) 2000-2002 i-scream
5			*
6			* This program is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU General Public License
8			* as published by the Free Software Foundation; either version 2
9			* of the License, or (at your option) any later version.
10			*
11			* This program 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
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19			*/
20
21			#ifdef HAVE_CONFIG_H
22			#include "config.h"
23			#endif
24
25	tdb	1.4	#include <stdlib.h>
26	pajs	1.6	#include <string.h>
27	pajs	1.1	#include "statgrab.h"
28	tdb	1.11	#include <time.h>
29	pajs	1.1	#ifdef SOLARIS
30			#include <kstat.h>
31			#include <sys/sysinfo.h>
32	pajs	1.6	#endif
33			#ifdef LINUX
34			#include <stdio.h>
35			#include <sys/types.h>
36			#include <regex.h>
37			#include "tools.h"
38	pajs	1.1	#endif
39
40	pajs	1.3	static network_stat_t *network_stats=NULL;
41			static int interfaces=0;
42	pajs	1.1
43	pajs	1.3	void network_stat_init(int start, int end, network_stat_t *net_stats){
44
45			for(net_stats+=start; start<end; start++){
46			net_stats->interface_name=NULL;
47			net_stats->tx=0;
48			net_stats->rx=0;
49			net_stats++;
50			}
51			}
52
53			network_stat_t network_stat_malloc(int needed_entries, int cur_entries, network_stat_t *net_stats){
54
55			if(net_stats==NULL){
56
57			if((net_stats=malloc(needed_entries * sizeof(network_stat_t)))==NULL){
58	pajs	1.1	return NULL;
59			}
60	pajs	1.3	network_stat_init(0, needed_entries, net_stats);
61			*cur_entries=needed_entries;
62
63	pajs	1.1	return net_stats;
64			}
65	pajs	1.3
66
67			if(*cur_entries<needed_entries){
68			net_stats=realloc(net_stats, (sizeof(network_stat_t)*needed_entries));
69			if(net_stats==NULL){
70	pajs	1.1	return NULL;
71			}
72	pajs	1.3	network_stat_init(*cur_entries, needed_entries, net_stats);
73			*cur_entries=needed_entries;
74	pajs	1.1	}
75
76			return net_stats;
77			}
78
79	pajs	1.3
80	pajs	1.1	network_stat_t get_network_stats(int entries){
81	pajs	1.6
82			static int sizeof_network_stats=0;
83			network_stat_t *network_stat_ptr;
84
85			#ifdef SOLARIS
86	pajs	1.1	kstat_ctl_t *kc;
87			kstat_t *ksp;
88			kstat_named_t *knp;
89	pajs	1.6	#endif
90	pajs	1.3
91	pajs	1.6	#ifdef LINUX
92			FILE *f;
93	pajs	1.12	/* Horrible big enough, but it should be easily big enough */
94	pajs	1.6	char line[8096];
95			regex_t regex;
96			regmatch_t line_match[4];
97			#endif
98	pajs	1.1
99	pajs	1.6	#ifdef SOLARIS
100	pajs	1.1	if ((kc = kstat_open()) == NULL) {
101			return NULL;
102			}
103
104	pajs	1.6	interfaces=0;
105	pajs	1.3
106	pajs	1.1	for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
107			if (!strcmp(ksp->ks_class, "net")) {
108			kstat_read(kc, ksp, NULL);
109
110	pajs	1.7	#ifdef SOL7
111			#define RLOOKUP "rbytes"
112			#define WLOOKUP "obytes"
113			#define VALTYPE value.ui32
114			#else
115			#define RLOOKUP "rbytes64"
116			#define WLOOKUP "obytes64"
117			#define VALTYPE value.ui64
118			#endif
119
120			if((knp=kstat_data_lookup(ksp, RLOOKUP))==NULL){
121	pajs	1.1	/* Not a network interface, so skip to the next entry */
122			continue;
123			}
124	pajs	1.3
125			network_stats=network_stat_malloc((interfaces+1), &sizeof_network_stats, network_stats);
126	pajs	1.1	if(network_stats==NULL){
127			return NULL;
128			}
129			network_stat_ptr=network_stats+interfaces;
130	pajs	1.7	network_stat_ptr->rx=knp->VALTYPE;
131	pajs	1.1
132	pajs	1.7	if((knp=kstat_data_lookup(ksp, WLOOKUP))==NULL){
133	pajs	1.1	/* Not a network interface, so skip to the next entry */
134			continue;
135			}
136	pajs	1.7	network_stat_ptr->tx=knp->VALTYPE;
137	pajs	1.1	if(network_stat_ptr->interface_name!=NULL){
138			free(network_stat_ptr->interface_name);
139			}
140			network_stat_ptr->interface_name=strdup(ksp->ks_name);
141	pajs	1.3
142			network_stat_ptr->systime=time(NULL);
143	pajs	1.1	interfaces++;
144			}
145			}
146	pajs	1.2
147			kstat_close(kc);
148	pajs	1.6	#endif
149			#ifdef LINUX
150			f=fopen("/proc/net/dev", "r");
151			if(f==NULL){
152			return NULL;
153			}
154			/* read the 2 lines.. Its the title, so we dont care :) */
155			fgets(line, sizeof(line), f);
156			fgets(line, sizeof(line), f);
157
158
159			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){
160			return NULL;
161			}
162
163			interfaces=0;
164	pajs	1.1
165	pajs	1.6	while((fgets(line, sizeof(line), f)) != NULL){
166			if((regexec(&regex, line, 4, line_match, 0))!=0){
167			continue;
168			}
169			network_stats=network_stat_malloc((interfaces+1), &sizeof_network_stats, network_stats);
170			if(network_stats==NULL){
171			return NULL;
172			}
173			network_stat_ptr=network_stats+interfaces;
174
175			if(network_stat_ptr->interface_name!=NULL){
176			free(network_stat_ptr->interface_name);
177			}
178
179			network_stat_ptr->interface_name=get_string_match(line, &line_match[1]);
180			network_stat_ptr->rx=get_ll_match(line, &line_match[2]);
181			network_stat_ptr->tx=get_ll_match(line, &line_match[3]);
182			network_stat_ptr->systime=time(NULL);
183
184			interfaces++;
185			}
186	pajs	1.12	fclose(f);
187	pajs	1.13	regfree(&regex);
188	pajs	1.6
189			#endif
190	pajs	1.1	*entries=interfaces;
191
192			return network_stats;
193	pajs	1.3	}
194
195	pajs	1.8	long long transfer_diff(long long new, long long old){
196			#ifdef SOL7
197			#define MAXVAL 4294967296
198			#else
199			#define MAXVAL 18446744073709551616
200			#endif
201			long long result;
202	pajs	1.10	if(new>=old){
203	pajs	1.8	result = (new-old);
204			}else{
205			result = (MAXVAL+(new-old));
206			}
207
208			return result;
209
210			}
211
212	pajs	1.3	network_stat_t get_network_stats_diff(int entries){
213			static network_stat_t *network_stats_diff=NULL;
214			static int sizeof_net_stats_diff=0;
215			network_stat_t network_stats_ptr, network_stats_diff_ptr;
216			int ifaces, x, y;
217
218			if(network_stats==NULL){
219			network_stats_ptr=get_network_stats(&ifaces);
220			*entries=ifaces;
221			return network_stats_ptr;
222			}
223
224			network_stats_diff=network_stat_malloc(interfaces, &sizeof_net_stats_diff, network_stats_diff);
225			if(network_stats_diff==NULL){
226			return NULL;
227			}
228
229			network_stats_ptr=network_stats;
230			network_stats_diff_ptr=network_stats_diff;
231
232			for(ifaces=0;ifaces<interfaces;ifaces++){
233			if(network_stats_diff_ptr->interface_name!=NULL){
234			free(network_stats_diff_ptr->interface_name);
235			}
236			network_stats_diff_ptr->interface_name=strdup(network_stats_ptr->interface_name);
237			network_stats_diff_ptr->tx=network_stats_ptr->tx;
238			network_stats_diff_ptr->rx=network_stats_ptr->rx;
239			network_stats_diff_ptr->systime=network_stats->systime;
240
241			network_stats_ptr++;
242			network_stats_diff_ptr++;
243			}
244			network_stats_ptr=get_network_stats(&ifaces);
245			network_stats_diff_ptr=network_stats_diff;
246
247			for(x=0;x<sizeof_net_stats_diff;x++){
248
249			if((strcmp(network_stats_diff_ptr->interface_name, network_stats_ptr->interface_name))==0){
250	pajs	1.9	network_stats_diff_ptr->tx = transfer_diff(network_stats_ptr->tx, network_stats_diff_ptr->tx);
251			network_stats_diff_ptr->rx = transfer_diff(network_stats_ptr->rx, network_stats_diff_ptr->rx);
252	pajs	1.3	network_stats_diff_ptr->systime = network_stats_ptr->systime - network_stats_diff_ptr->systime;
253			}else{
254
255			network_stats_ptr=network_stats;
256			for(y=0;y<ifaces;y++){
257			if((strcmp(network_stats_diff_ptr->interface_name, network_stats_ptr->interface_name))==0){
258	pajs	1.9	network_stats_diff_ptr->tx = transfer_diff(network_stats_ptr->tx, network_stats_diff_ptr->tx);
259			network_stats_diff_ptr->rx = transfer_diff(network_stats_ptr->rx, network_stats_diff_ptr->rx);
260	pajs	1.3	network_stats_diff_ptr->systime = network_stats_ptr->systime - network_stats_diff_ptr->systime;
261			break;
262			}
263
264			network_stats_ptr++;
265			}
266			}
267
268			network_stats_ptr++;
269			network_stats_diff_ptr++;
270			}
271
272	pajs	1.5	*entries=sizeof_net_stats_diff;
273	pajs	1.3	return network_stats_diff;
274			}
275	pajs	1.1