src/libstatgrab/network_stats.c

/* 
 * i-scream central monitoring system
 * http://www.i-scream.org
 * Copyright (C) 2000-2003 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
#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:	1.21
Committed:	Sat Jan 10 16:25:51 2004 UTC (20 years, 4 months ago) by ats
Content type:	text/plain
Branch:	MAIN
Changes since 1.20:	+3 -0 lines
Log Message:	Add a couple of missing checks for NULL return values; this fixes the crash when libstatgrab runs out of FDs.
#	Content
1	/*
2	* i-scream central monitoring system
3	* http://www.i-scream.org
4	* Copyright (C) 2000-2003 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	#include <stdlib.h>
26	#include <string.h>
27	#include "statgrab.h"
28	#include <time.h>
29	#ifdef SOLARIS
30	#include <kstat.h>
31	#include <sys/sysinfo.h>
32	#endif
33	#ifdef LINUX
34	#include <stdio.h>
35	#include <sys/types.h>
36	#include <regex.h>
37	#include "tools.h"
38	#endif
39	#ifdef ALLBSD
40	#include <sys/types.h>
41	#include <sys/socket.h>
42	#include <ifaddrs.h>
43	#include <net/if.h>
44	#endif
45
46	static network_stat_t *network_stats=NULL;
47	static int interfaces=0;
48
49	void network_stat_init(int start, int end, network_stat_t *net_stats){
50
51	for(net_stats+=start; start<end; start++){
52	net_stats->interface_name=NULL;
53	net_stats->tx=0;
54	net_stats->rx=0;
55	net_stats++;
56	}
57	}
58
59	network_stat_t network_stat_malloc(int needed_entries, int cur_entries, network_stat_t *net_stats){
60
61	if(net_stats==NULL){
62
63	if((net_stats=malloc(needed_entries * sizeof(network_stat_t)))==NULL){
64	return NULL;
65	}
66	network_stat_init(0, needed_entries, net_stats);
67	*cur_entries=needed_entries;
68
69	return net_stats;
70	}
71
72
73	if(*cur_entries<needed_entries){
74	net_stats=realloc(net_stats, (sizeof(network_stat_t)*needed_entries));
75	if(net_stats==NULL){
76	return NULL;
77	}
78	network_stat_init(*cur_entries, needed_entries, net_stats);
79	*cur_entries=needed_entries;
80	}
81
82	return net_stats;
83	}
84
85
86	network_stat_t get_network_stats(int entries){
87
88	static int sizeof_network_stats=0;
89	network_stat_t *network_stat_ptr;
90
91	#ifdef SOLARIS
92	kstat_ctl_t *kc;
93	kstat_t *ksp;
94	kstat_named_t *knp;
95	#endif
96
97	#ifdef LINUX
98	FILE *f;
99	/* Horrible big enough, but it should be easily big enough */
100	char line[8096];
101	regex_t regex;
102	regmatch_t line_match[4];
103	#endif
104	#ifdef ALLBSD
105	struct ifaddrs net, net_ptr;
106	struct if_data *net_data;
107	#endif
108
109	#ifdef ALLBSD
110	if(getifaddrs(&net) != 0){
111	return NULL;
112	}
113
114	interfaces=0;
115
116	for(net_ptr=net;net_ptr!=NULL;net_ptr=net_ptr->ifa_next){
117	if(net_ptr->ifa_addr->sa_family != AF_LINK) continue;
118	network_stats=network_stat_malloc((interfaces+1), &sizeof_network_stats, network_stats);
119	if(network_stats==NULL){
120	return NULL;
121	}
122	network_stat_ptr=network_stats+interfaces;
123
124	if(network_stat_ptr->interface_name!=NULL) free(network_stat_ptr->interface_name);
125	network_stat_ptr->interface_name=strdup(net_ptr->ifa_name);
126	if(network_stat_ptr->interface_name==NULL) return NULL;
127	net_data=(struct if_data *)net_ptr->ifa_data;
128	network_stat_ptr->rx=net_data->ifi_ibytes;
129	network_stat_ptr->tx=net_data->ifi_obytes;
130	network_stat_ptr->systime=time(NULL);
131	interfaces++;
132	}
133	freeifaddrs(net);
134	#endif
135
136	#ifdef SOLARIS
137	if ((kc = kstat_open()) == NULL) {
138	return NULL;
139	}
140
141	interfaces=0;
142
143	for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
144	if (!strcmp(ksp->ks_class, "net")) {
145	kstat_read(kc, ksp, NULL);
146
147	#ifdef SOL7
148	#define RLOOKUP "rbytes"
149	#define WLOOKUP "obytes"
150	#define VALTYPE value.ui32
151	#else
152	#define RLOOKUP "rbytes64"
153	#define WLOOKUP "obytes64"
154	#define VALTYPE value.ui64
155	#endif
156
157	if((knp=kstat_data_lookup(ksp, RLOOKUP))==NULL){
158	/* Not a network interface, so skip to the next entry */
159	continue;
160	}
161
162	network_stats=network_stat_malloc((interfaces+1), &sizeof_network_stats, network_stats);
163	if(network_stats==NULL){
164	return NULL;
165	}
166	network_stat_ptr=network_stats+interfaces;
167	network_stat_ptr->rx=knp->VALTYPE;
168
169	if((knp=kstat_data_lookup(ksp, WLOOKUP))==NULL){
170	/* Not a network interface, so skip to the next entry */
171	continue;
172	}
173	network_stat_ptr->tx=knp->VALTYPE;
174	if(network_stat_ptr->interface_name!=NULL){
175	free(network_stat_ptr->interface_name);
176	}
177	network_stat_ptr->interface_name=strdup(ksp->ks_name);
178
179	network_stat_ptr->systime=time(NULL);
180	interfaces++;
181	}
182	}
183
184	kstat_close(kc);
185	#endif
186	#ifdef LINUX
187	f=fopen("/proc/net/dev", "r");
188	if(f==NULL){
189	return NULL;
190	}
191	/* read the 2 lines.. Its the title, so we dont care :) */
192	fgets(line, sizeof(line), f);
193	fgets(line, sizeof(line), f);
194
195
196	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){
197	return NULL;
198	}
199
200	interfaces=0;
201
202	while((fgets(line, sizeof(line), f)) != NULL){
203	if((regexec(&regex, line, 4, line_match, 0))!=0){
204	continue;
205	}
206	network_stats=network_stat_malloc((interfaces+1), &sizeof_network_stats, network_stats);
207	if(network_stats==NULL){
208	return NULL;
209	}
210	network_stat_ptr=network_stats+interfaces;
211
212	if(network_stat_ptr->interface_name!=NULL){
213	free(network_stat_ptr->interface_name);
214	}
215
216	network_stat_ptr->interface_name=get_string_match(line, &line_match[1]);
217	network_stat_ptr->rx=get_ll_match(line, &line_match[2]);
218	network_stat_ptr->tx=get_ll_match(line, &line_match[3]);
219	network_stat_ptr->systime=time(NULL);
220
221	interfaces++;
222	}
223	fclose(f);
224	regfree(&regex);
225
226	#endif
227
228	#ifdef CYGWIN
229	return NULL;
230	#endif
231
232	*entries=interfaces;
233
234	return network_stats;
235	}
236
237	long long transfer_diff(long long new, long long old){
238	#if defined(SOL7) \|\| defined(LINUX) \|\| defined(FREEBSD)
239	#define MAXVAL 4294967296LL
240	#else
241	#define MAXVAL 18446744073709551616LL
242	#endif
243	long long result;
244	if(new>=old){
245	result = (new-old);
246	}else{
247	result = (MAXVAL+(new-old));
248	}
249
250	return result;
251
252	}
253
254	network_stat_t get_network_stats_diff(int entries){
255	static network_stat_t *network_stats_diff=NULL;
256	static int sizeof_net_stats_diff=0;
257	network_stat_t network_stats_ptr, network_stats_diff_ptr;
258	int ifaces, x, y;
259
260	if(network_stats==NULL){
261	network_stats_ptr=get_network_stats(&ifaces);
262	*entries=ifaces;
263	return network_stats_ptr;
264	}
265
266	network_stats_diff=network_stat_malloc(interfaces, &sizeof_net_stats_diff, network_stats_diff);
267	if(network_stats_diff==NULL){
268	return NULL;
269	}
270
271	network_stats_ptr=network_stats;
272	network_stats_diff_ptr=network_stats_diff;
273
274	for(ifaces=0;ifaces<interfaces;ifaces++){
275	if(network_stats_diff_ptr->interface_name!=NULL){
276	free(network_stats_diff_ptr->interface_name);
277	}
278	network_stats_diff_ptr->interface_name=strdup(network_stats_ptr->interface_name);
279	network_stats_diff_ptr->tx=network_stats_ptr->tx;
280	network_stats_diff_ptr->rx=network_stats_ptr->rx;
281	network_stats_diff_ptr->systime=network_stats->systime;
282
283	network_stats_ptr++;
284	network_stats_diff_ptr++;
285	}
286	network_stats_ptr=get_network_stats(&ifaces);
287	if (network_stats_ptr == NULL) {
288	return NULL;
289	}
290	network_stats_diff_ptr=network_stats_diff;
291
292	for(x=0;x<sizeof_net_stats_diff;x++){
293
294	if((strcmp(network_stats_diff_ptr->interface_name, network_stats_ptr->interface_name))==0){
295	network_stats_diff_ptr->tx = transfer_diff(network_stats_ptr->tx, network_stats_diff_ptr->tx);
296	network_stats_diff_ptr->rx = transfer_diff(network_stats_ptr->rx, network_stats_diff_ptr->rx);
297	network_stats_diff_ptr->systime = network_stats_ptr->systime - network_stats_diff_ptr->systime;
298	}else{
299
300	network_stats_ptr=network_stats;
301	for(y=0;y<ifaces;y++){
302	if((strcmp(network_stats_diff_ptr->interface_name, network_stats_ptr->interface_name))==0){
303	network_stats_diff_ptr->tx = transfer_diff(network_stats_ptr->tx, network_stats_diff_ptr->tx);
304	network_stats_diff_ptr->rx = transfer_diff(network_stats_ptr->rx, network_stats_diff_ptr->rx);
305	network_stats_diff_ptr->systime = network_stats_ptr->systime - network_stats_diff_ptr->systime;
306	break;
307	}
308
309	network_stats_ptr++;
310	}
311	}
312
313	network_stats_ptr++;
314	network_stats_diff_ptr++;
315	}
316
317	*entries=sizeof_net_stats_diff;
318	return network_stats_diff;
319	}
320