summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorStanley Hopcroft <stanleyhopcroft@users.sourceforge.net>2005-01-25 09:20:12 +0000
committerStanley Hopcroft <stanleyhopcroft@users.sourceforge.net>2005-01-25 09:20:12 +0000
commit0f7a576dfcd902f2d55a3eab501153d7b85cca68 (patch)
tree44d36e5d440bf27cea4ae4828274a6739d45888b
parent0c95ab5dd9697d9dddb5e57840f5e55ad130a095 (diff)
downloadmonitoring-plugins-0f7a576dfcd902f2d55a3eab501153d7b85cca68.tar.gz
moved to /plugins (core plugin)
git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@1103 f882894a-f735-0410-b71e-b25c423dba1c
Diffstat
-rw-r--r--contrib/check_dhcp.c1001
-rw-r--r--contrib/tarballs/check_icmp-0.8.tar.gzbin12944 -> 0 bytes
2 files changed, 0 insertions, 1001 deletions
diff --git a/contrib/check_dhcp.c b/contrib/check_dhcp.c
deleted file mode 100644
index 8669e44a..00000000
--- a/contrib/check_dhcp.c
+++ /dev/null
@@ -1,1001 +0,0 @@
1/******************************************************************************
2*
3* CHECK_DHCP.C
4*
5* Program: DHCP plugin for Nagios
6* License: GPL
7* Copyright (c) 2001-2004 Ethan Galstad (nagios@nagios.org)
8*
9* License Information:
10*
11* This program is free software; you can redistribute it and/or modify
12* it under the terms of the GNU General Public License as published by
13* the Free Software Foundation; either version 2 of the License, or
14* (at your option) any later version.
15*
16* This program is distributed in the hope that it will be useful,
17* but WITHOUT ANY WARRANTY; without even the implied warranty of
18* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19* GNU General Public License for more details.
20*
21* You should have received a copy of the GNU General Public License
22* along with this program; if not, write to the Free Software
23* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24*
25*****************************************************************************/
26
27#include <stdio.h>
28#include <stdlib.h>
29#include <string.h>
30#include <errno.h>
31#include <unistd.h>
32#include <sys/time.h>
33#include <sys/ioctl.h>
34#include <fcntl.h>
35#include <features.h>
36#include <linux/if_ether.h>
37#include <getopt.h>
38#include <net/if.h>
39#include <sys/socket.h>
40#include <sys/types.h>
41#include <netinet/in.h>
42#include <arpa/inet.h>
43#include <netdb.h>
44
45const char *progname = "check_dhcp";
46
47/*#define DEBUG*/
48#define HAVE_GETOPT_H
49
50
51/**** Common definitions ****/
52
53#define STATE_OK 0
54#define STATE_WARNING 1
55#define STATE_CRITICAL 2
56#define STATE_UNKNOWN -1
57
58#define OK 0
59#define ERROR -1
60
61#define FALSE 0
62#define TRUE 1
63
64
65/**** DHCP definitions ****/
66
67#define MAX_DHCP_CHADDR_LENGTH 16
68#define MAX_DHCP_SNAME_LENGTH 64
69#define MAX_DHCP_FILE_LENGTH 128
70#define MAX_DHCP_OPTIONS_LENGTH 312
71
72
73typedef struct dhcp_packet_struct{
74 u_int8_t op; /* packet type */
75 u_int8_t htype; /* type of hardware address for this machine (Ethernet, etc) */
76 u_int8_t hlen; /* length of hardware address (of this machine) */
77 u_int8_t hops; /* hops */
78 u_int32_t xid; /* random transaction id number - chosen by this machine */
79 u_int16_t secs; /* seconds used in timing */
80 u_int16_t flags; /* flags */
81 struct in_addr ciaddr; /* IP address of this machine (if we already have one) */
82 struct in_addr yiaddr; /* IP address of this machine (offered by the DHCP server) */
83 struct in_addr siaddr; /* IP address of DHCP server */
84 struct in_addr giaddr; /* IP address of DHCP relay */
85 unsigned char chaddr [MAX_DHCP_CHADDR_LENGTH]; /* hardware address of this machine */
86 char sname [MAX_DHCP_SNAME_LENGTH]; /* name of DHCP server */
87 char file [MAX_DHCP_FILE_LENGTH]; /* boot file name (used for diskless booting?) */
88 char options[MAX_DHCP_OPTIONS_LENGTH]; /* options */
89 }dhcp_packet;
90
91
92typedef struct dhcp_offer_struct{
93 struct in_addr server_address; /* address of DHCP server that sent this offer */
94 struct in_addr offered_address; /* the IP address that was offered to us */
95 u_int32_t lease_time; /* lease time in seconds */
96 u_int32_t renewal_time; /* renewal time in seconds */
97 u_int32_t rebinding_time; /* rebinding time in seconds */
98 struct dhcp_offer_struct *next;
99 }dhcp_offer;
100
101
102typedef struct requested_server_struct{
103 struct in_addr server_address;
104 struct requested_server_struct *next;
105 }requested_server;
106
107
108#define BOOTREQUEST 1
109#define BOOTREPLY 2
110
111#define DHCPDISCOVER 1
112#define DHCPOFFER 2
113#define DHCPREQUEST 3
114#define DHCPDECLINE 4
115#define DHCPACK 5
116#define DHCPNACK 6
117#define DHCPRELEASE 7
118
119#define DHCP_OPTION_MESSAGE_TYPE 53
120#define DHCP_OPTION_HOST_NAME 12
121#define DHCP_OPTION_BROADCAST_ADDRESS 28
122#define DHCP_OPTION_REQUESTED_ADDRESS 50
123#define DHCP_OPTION_LEASE_TIME 51
124#define DHCP_OPTION_RENEWAL_TIME 58
125#define DHCP_OPTION_REBINDING_TIME 59
126
127#define DHCP_INFINITE_TIME 0xFFFFFFFF
128
129#define DHCP_BROADCAST_FLAG 32768
130
131#define DHCP_SERVER_PORT 67
132#define DHCP_CLIENT_PORT 68
133
134#define ETHERNET_HARDWARE_ADDRESS 1 /* used in htype field of dhcp packet */
135#define ETHERNET_HARDWARE_ADDRESS_LENGTH 6 /* length of Ethernet hardware addresses */
136
137unsigned char client_hardware_address[MAX_DHCP_CHADDR_LENGTH]="";
138
139char network_interface_name[8]="eth0";
140
141u_int32_t packet_xid=0;
142
143u_int32_t dhcp_lease_time=0;
144u_int32_t dhcp_renewal_time=0;
145u_int32_t dhcp_rebinding_time=0;
146
147int dhcpoffer_timeout=2;
148
149dhcp_offer *dhcp_offer_list=NULL;
150requested_server *requested_server_list=NULL;
151
152int valid_responses=0; /* number of valid DHCPOFFERs we received */
153int requested_servers=0;
154int requested_responses=0;
155
156int request_specific_address=FALSE;
157int received_requested_address=FALSE;
158struct in_addr requested_address;
159
160
161int process_arguments(int, char **);
162int call_getopt(int, char **);
163int validate_arguments(void);
164void print_usage(void);
165void print_help(void);
166
167int get_hardware_address(int,char *);
168
169int send_dhcp_discover(int);
170int get_dhcp_offer(int);
171
172int get_results(void);
173
174int add_dhcp_offer(struct in_addr,dhcp_packet *);
175int free_dhcp_offer_list(void);
176int free_requested_server_list(void);
177
178int create_dhcp_socket(void);
179int close_dhcp_socket(int);
180int send_dhcp_packet(void *,int,int,struct sockaddr_in *);
181int receive_dhcp_packet(void *,int,int,int,struct sockaddr_in *);
182
183
184
185int main(int argc, char **argv){
186 int dhcp_socket;
187 int result;
188
189 if(process_arguments(argc,argv)!=OK){
190 /*usage("Invalid command arguments supplied\n");*/
191 printf("Invalid command arguments supplied\n");
192 exit(STATE_UNKNOWN);
193 }
194
195
196 /* create socket for DHCP communications */
197 dhcp_socket=create_dhcp_socket();
198
199 /* get hardware address of client machine */
200 get_hardware_address(dhcp_socket,network_interface_name);
201
202 /* send DHCPDISCOVER packet */
203 send_dhcp_discover(dhcp_socket);
204
205 /* wait for a DHCPOFFER packet */
206 get_dhcp_offer(dhcp_socket);
207
208 /* close socket we created */
209 close_dhcp_socket(dhcp_socket);
210
211 /* determine state/plugin output to return */
212 result=get_results();
213
214 /* free allocated memory */
215 free_dhcp_offer_list();
216 free_requested_server_list();
217
218 return result;
219 }
220
221
222
223/* determines hardware address on client machine */
224int get_hardware_address(int sock,char *interface_name){
225 struct ifreq ifr;
226
227 strncpy((char *)&ifr.ifr_name,interface_name,sizeof(ifr.ifr_name));
228
229 /* try and grab hardware address of requested interface */
230 if(ioctl(sock,SIOCGIFHWADDR,&ifr)<0){
231 printf("Error: Could not get hardware address of interface '%s'\n",interface_name);
232 exit(STATE_UNKNOWN);
233 }
234
235 memcpy(&client_hardware_address[0],&ifr.ifr_hwaddr.sa_data,6);
236
237#ifdef DEBUG
238 printf("Hardware address: %02x:%02x:%02x:",client_hardware_address[0],client_hardware_address[1],client_hardware_address[2]);
239 printf("%02x:",client_hardware_address[3]);
240 printf("%02x:%02x\n",client_hardware_address[4],client_hardware_address[5]);
241 printf("\n");
242#endif
243
244 return OK;
245 }
246
247
248/* sends a DHCPDISCOVER broadcast message in an attempt to find DHCP servers */
249int send_dhcp_discover(int sock){
250 dhcp_packet discover_packet;
251 struct sockaddr_in sockaddr_broadcast;
252
253
254 /* clear the packet data structure */
255 bzero(&discover_packet,sizeof(discover_packet));
256
257
258 /* boot request flag (backward compatible with BOOTP servers) */
259 discover_packet.op=BOOTREQUEST;
260
261 /* hardware address type */
262 discover_packet.htype=ETHERNET_HARDWARE_ADDRESS;
263
264 /* length of our hardware address */
265 discover_packet.hlen=ETHERNET_HARDWARE_ADDRESS_LENGTH;
266
267 discover_packet.hops=0;
268
269 /* transaction id is supposed to be random */
270 srand(time(NULL));
271 packet_xid=random();
272 discover_packet.xid=htonl(packet_xid);
273
274 /**** WHAT THE HECK IS UP WITH THIS?!? IF I DON'T MAKE THIS CALL, ONLY ONE SERVER RESPONSE IS PROCESSED!!!! ****/
275 /* downright bizzarre... */
276 ntohl(discover_packet.xid);
277
278 /*discover_packet.secs=htons(65535);*/
279 discover_packet.secs=0xFF;
280
281 /* tell server it should broadcast its response */
282 discover_packet.flags=htons(DHCP_BROADCAST_FLAG);
283
284 /* our hardware address */
285 memcpy(discover_packet.chaddr,client_hardware_address,ETHERNET_HARDWARE_ADDRESS_LENGTH);
286
287 /* first four bytes of options field is magic cookie (as per RFC 2132) */
288 discover_packet.options[0]='\x63';
289 discover_packet.options[1]='\x82';
290 discover_packet.options[2]='\x53';
291 discover_packet.options[3]='\x63';
292
293 /* DHCP message type is embedded in options field */
294 discover_packet.options[4]=DHCP_OPTION_MESSAGE_TYPE; /* DHCP message type option identifier */
295 discover_packet.options[5]='\x01'; /* DHCP message option length in bytes */
296 discover_packet.options[6]=DHCPDISCOVER;
297
298 /* the IP address we're requesting */
299 if(request_specific_address==TRUE){
300 discover_packet.options[7]=DHCP_OPTION_REQUESTED_ADDRESS;
301 discover_packet.options[8]='\x04';
302 memcpy(&discover_packet.options[9],&requested_address,sizeof(requested_address));
303 }
304
305 /* send the DHCPDISCOVER packet to broadcast address */
306 sockaddr_broadcast.sin_family=AF_INET;
307 sockaddr_broadcast.sin_port=htons(DHCP_SERVER_PORT);
308 sockaddr_broadcast.sin_addr.s_addr=INADDR_BROADCAST;
309 bzero(&sockaddr_broadcast.sin_zero,sizeof(sockaddr_broadcast.sin_zero));
310
311
312#ifdef DEBUG
313 printf("DHCPDISCOVER to %s port %d\n",inet_ntoa(sockaddr_broadcast.sin_addr),ntohs(sockaddr_broadcast.sin_port));
314 printf("DHCPDISCOVER XID: %lu (0x%X)\n",ntohl(discover_packet.xid),ntohl(discover_packet.xid));
315 printf("DHCDISCOVER ciaddr: %s\n",inet_ntoa(discover_packet.ciaddr));
316 printf("DHCDISCOVER yiaddr: %s\n",inet_ntoa(discover_packet.yiaddr));
317 printf("DHCDISCOVER siaddr: %s\n",inet_ntoa(discover_packet.siaddr));
318 printf("DHCDISCOVER giaddr: %s\n",inet_ntoa(discover_packet.giaddr));
319#endif
320
321 /* send the DHCPDISCOVER packet out */
322 send_dhcp_packet(&discover_packet,sizeof(discover_packet),sock,&sockaddr_broadcast);
323
324#ifdef DEBUG
325 printf("\n\n");
326#endif
327
328 return OK;
329 }
330
331
332
333
334/* waits for a DHCPOFFER message from one or more DHCP servers */
335int get_dhcp_offer(int sock){
336 dhcp_packet offer_packet;
337 struct sockaddr_in source;
338 int result=OK;
339 int timeout=1;
340 int responses=0;
341 int x;
342 time_t start_time;
343 time_t current_time;
344
345 time(&start_time);
346
347 /* receive as many responses as we can */
348 for(responses=0,valid_responses=0;;){
349
350 time(&current_time);
351 if((current_time-start_time)>=dhcpoffer_timeout)
352 break;
353
354#ifdef DEBUG
355 printf("\n\n");
356#endif
357
358 bzero(&source,sizeof(source));
359 bzero(&offer_packet,sizeof(offer_packet));
360
361 result=OK;
362 result=receive_dhcp_packet(&offer_packet,sizeof(offer_packet),sock,dhcpoffer_timeout,&source);
363
364 if(result!=OK){
365#ifdef DEBUG
366 printf("Result=ERROR\n");
367#endif
368 continue;
369 }
370 else{
371#ifdef DEBUG
372 printf("Result=OK\n");
373#endif
374 responses++;
375 }
376
377#ifdef DEBUG
378 printf("DHCPOFFER from IP address %s\n",inet_ntoa(source.sin_addr));
379 printf("DHCPOFFER XID: %lu (0x%X)\n",ntohl(offer_packet.xid),ntohl(offer_packet.xid));
380#endif
381
382 /* check packet xid to see if its the same as the one we used in the discover packet */
383 if(ntohl(offer_packet.xid)!=packet_xid){
384#ifdef DEBUG
385 printf("DHCPOFFER XID (%lu) did not match DHCPDISCOVER XID (%lu) - ignoring packet\n",ntohl(offer_packet.xid),packet_xid);
386#endif
387 continue;
388 }
389
390 /* check hardware address */
391 result=OK;
392#ifdef DEBUG
393 printf("DHCPOFFER chaddr: ");
394#endif
395 for(x=0;x<ETHERNET_HARDWARE_ADDRESS_LENGTH;x++){
396#ifdef DEBUG
397 printf("%02X",(unsigned char)offer_packet.chaddr[x]);
398#endif
399 if(offer_packet.chaddr[x]!=client_hardware_address[x]){
400 result=ERROR;
401 }
402 }
403#ifdef DEBUG
404 printf("\n");
405#endif
406 if(result==ERROR){
407#ifdef DEBUG
408 printf("DHCPOFFER hardware address did not match our own - ignoring packet\n");
409#endif
410 continue;
411 }
412
413#ifdef DEBUG
414 printf("DHCPOFFER ciaddr: %s\n",inet_ntoa(offer_packet.ciaddr));
415 printf("DHCPOFFER yiaddr: %s\n",inet_ntoa(offer_packet.yiaddr));
416 printf("DHCPOFFER siaddr: %s\n",inet_ntoa(offer_packet.siaddr));
417 printf("DHCPOFFER giaddr: %s\n",inet_ntoa(offer_packet.giaddr));
418#endif
419
420 add_dhcp_offer(source.sin_addr,&offer_packet);
421
422 valid_responses++;
423 }
424
425#ifdef DEBUG
426 printf("Total responses seen on the wire: %d\n",responses);
427 printf("Valid responses for this machine: %d\n",valid_responses);
428#endif
429
430 return OK;
431 }
432
433
434
435/* sends a DHCP packet */
436int send_dhcp_packet(void *buffer, int buffer_size, int sock, struct sockaddr_in *dest){
437 struct sockaddr_in myname;
438 int result;
439
440 result=sendto(sock,(char *)buffer,buffer_size,0,(struct sockaddr *)dest,sizeof(*dest));
441
442#ifdef DEBUG
443 printf("send_dhcp_packet result: %d\n",result);
444#endif
445
446 if(result<0)
447 return ERROR;
448
449 return OK;
450 }
451
452
453
454/* receives a DHCP packet */
455int receive_dhcp_packet(void *buffer, int buffer_size, int sock, int timeout, struct sockaddr_in *address){
456 struct timeval tv;
457 fd_set readfds;
458 int recv_result;
459 socklen_t address_size;
460 struct sockaddr_in source_address;
461
462
463 /* wait for data to arrive (up time timeout) */
464 tv.tv_sec=timeout;
465 tv.tv_usec=0;
466 FD_ZERO(&readfds);
467 FD_SET(sock,&readfds);
468 select(sock+1,&readfds,NULL,NULL,&tv);
469
470 /* make sure some data has arrived */
471 if(!FD_ISSET(sock,&readfds)){
472#ifdef DEBUG
473 printf("No (more) data received\n");
474#endif
475 return ERROR;
476 }
477
478 else{
479
480 /* why do we need to peek first? i don't know, its a hack. without it, the source address of the first packet received was
481 not being interpreted correctly. sigh... */
482 bzero(&source_address,sizeof(source_address));
483 address_size=sizeof(source_address);
484 recv_result=recvfrom(sock,(char *)buffer,buffer_size,MSG_PEEK,(struct sockaddr *)&source_address,&address_size);
485#ifdef DEBUG
486 printf("recv_result_1: %d\n",recv_result);
487#endif
488 recv_result=recvfrom(sock,(char *)buffer,buffer_size,0,(struct sockaddr *)&source_address,&address_size);
489#ifdef DEBUG
490 printf("recv_result_2: %d\n",recv_result);
491#endif
492
493 if(recv_result==-1){
494#ifdef DEBUG
495 printf("recvfrom() failed, ");
496 printf("errno: (%d) -> %s\n",errno,strerror(errno));
497#endif
498 return ERROR;
499 }
500 else{
501#ifdef DEBUG
502 printf("receive_dhcp_packet() result: %d\n",recv_result);
503 printf("receive_dhcp_packet() source: %s\n",inet_ntoa(source_address.sin_addr));
504#endif
505
506 memcpy(address,&source_address,sizeof(source_address));
507 return OK;
508 }
509 }
510
511 return OK;
512 }
513
514
515
516/* creates a socket for DHCP communication */
517int create_dhcp_socket(void){
518 struct sockaddr_in myname;
519 struct ifreq interface;
520 int sock;
521 int flag=1;
522
523 /* Set up the address we're going to bind to. */
524 bzero(&myname,sizeof(myname));
525 myname.sin_family=AF_INET;
526 myname.sin_port=htons(DHCP_CLIENT_PORT);
527 myname.sin_addr.s_addr=INADDR_ANY; /* listen on any address */
528 bzero(&myname.sin_zero,sizeof(myname.sin_zero));
529
530 /* create a socket for DHCP communications */
531 sock=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
532 if(sock<0){
533 printf("Error: Could not create socket!\n");
534 exit(STATE_UNKNOWN);
535 }
536
537#ifdef DEBUG
538 printf("DHCP socket: %d\n",sock);
539#endif
540
541 /* set the reuse address flag so we don't get errors when restarting */
542 flag=1;
543 if(setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(char *)&flag,sizeof(flag))<0){
544 printf("Error: Could not set reuse address option on DHCP socket!\n");
545 exit(STATE_UNKNOWN);
546 }
547
548 /* set the broadcast option - we need this to listen to DHCP broadcast messages */
549 if(setsockopt(sock,SOL_SOCKET,SO_BROADCAST,(char *)&flag,sizeof flag)<0){
550 printf("Error: Could not set broadcast option on DHCP socket!\n");
551 exit(STATE_UNKNOWN);
552 }
553
554 /* bind socket to interface */
555 strncpy(interface.ifr_ifrn.ifrn_name,network_interface_name,IFNAMSIZ);
556 if(setsockopt(sock,SOL_SOCKET,SO_BINDTODEVICE,(char *)&interface,sizeof(interface))<0){
557 printf("Error: Could not bind socket to interface %s. Check your privileges...\n",network_interface_name);
558 exit(STATE_UNKNOWN);
559 }
560
561 /* bind the socket */
562 if(bind(sock,(struct sockaddr *)&myname,sizeof(myname))<0){
563 printf("Error: Could not bind to DHCP socket (port %d)! Check your privileges...\n",DHCP_CLIENT_PORT);
564 exit(STATE_UNKNOWN);
565 }
566
567 return sock;
568 }
569
570
571
572
573
574/* closes DHCP socket */
575int close_dhcp_socket(int sock){
576
577 close(sock);
578
579 return OK;
580 }
581
582
583
584
585/* adds a requested server address to list in memory */
586int add_requested_server(struct in_addr server_address){
587 requested_server *new_server;
588
589 new_server=(requested_server *)malloc(sizeof(requested_server));
590 if(new_server==NULL)
591 return ERROR;
592
593 new_server->server_address=server_address;
594
595 new_server->next=requested_server_list;
596 requested_server_list=new_server;
597
598 requested_servers++;
599
600#ifdef DEBUG
601 printf("Requested server address: %s\n",inet_ntoa(new_server->server_address));
602#endif
603
604 return OK;
605 }
606
607
608
609
610/* adds a DHCP OFFER to list in memory */
611int add_dhcp_offer(struct in_addr source,dhcp_packet *offer_packet){
612 dhcp_offer *new_offer;
613 int x;
614 int y;
615 unsigned option_type;
616 unsigned option_length;
617
618 if(offer_packet==NULL)
619 return ERROR;
620
621 /* process all DHCP options present in the packet */
622 for(x=4;x<MAX_DHCP_OPTIONS_LENGTH;){
623
624 /* end of options (0 is really just a pad, but bail out anyway) */
625 if((int)offer_packet->options[x]==-1 || (int)offer_packet->options[x]==0)
626 break;
627
628 /* get option type */
629 option_type=offer_packet->options[x++];
630
631 /* get option length */
632 option_length=offer_packet->options[x++];
633
634#ifdef DEBUG
635 printf("Option: %d (0x%02X)\n",option_type,option_length);
636#endif
637
638 /* get option data */
639 if(option_type==DHCP_OPTION_LEASE_TIME)
640 dhcp_lease_time=ntohl(*((u_int32_t *)&offer_packet->options[x]));
641 if(option_type==DHCP_OPTION_RENEWAL_TIME)
642 dhcp_renewal_time=ntohl(*((u_int32_t *)&offer_packet->options[x]));
643 if(option_type==DHCP_OPTION_REBINDING_TIME)
644 dhcp_rebinding_time=ntohl(*((u_int32_t *)&offer_packet->options[x]));
645
646 /* skip option data we're ignoring */
647 else
648 for(y=0;y<option_length;y++,x++);
649 }
650
651#ifdef DEBUG
652 if(dhcp_lease_time==DHCP_INFINITE_TIME)
653 printf("Lease Time: Infinite\n");
654 else
655 printf("Lease Time: %lu seconds\n",(unsigned long)dhcp_lease_time);
656 if(dhcp_renewal_time==DHCP_INFINITE_TIME)
657 printf("Renewal Time: Infinite\n");
658 else
659 printf("Renewal Time: %lu seconds\n",(unsigned long)dhcp_renewal_time);
660 if(dhcp_rebinding_time==DHCP_INFINITE_TIME)
661 printf("Rebinding Time: Infinite\n");
662 printf("Rebinding Time: %lu seconds\n",(unsigned long)dhcp_rebinding_time);
663#endif
664
665 new_offer=(dhcp_offer *)malloc(sizeof(dhcp_offer));
666
667 if(new_offer==NULL)
668 return ERROR;
669
670
671 new_offer->server_address=source;
672 new_offer->offered_address=offer_packet->yiaddr;
673 new_offer->lease_time=dhcp_lease_time;
674 new_offer->renewal_time=dhcp_renewal_time;
675 new_offer->rebinding_time=dhcp_rebinding_time;
676
677
678#ifdef DEBUG
679 printf("Added offer from server @ %s",inet_ntoa(new_offer->server_address));
680 printf(" of IP address %s\n",inet_ntoa(new_offer->offered_address));
681#endif
682
683 /* add new offer to head of list */
684 new_offer->next=dhcp_offer_list;
685 dhcp_offer_list=new_offer;
686
687 return OK;
688 }
689
690
691
692
693/* frees memory allocated to DHCP OFFER list */
694int free_dhcp_offer_list(void){
695 dhcp_offer *this_offer;
696 dhcp_offer *next_offer;
697
698 for(this_offer=dhcp_offer_list;this_offer!=NULL;this_offer=next_offer){
699 next_offer=this_offer->next;
700 free(this_offer);
701 }
702
703 return OK;
704 }
705
706
707
708
709/* frees memory allocated to requested server list */
710int free_requested_server_list(void){
711 requested_server *this_server;
712 requested_server *next_server;
713
714 for(this_server=requested_server_list;this_server!=NULL;this_server=next_server){
715 next_server=this_server->next;
716 free(this_server);
717 }
718
719 return OK;
720 }
721
722
723/* gets state and plugin output to return */
724int get_results(void){
725 dhcp_offer *temp_offer;
726 requested_server *temp_server;
727 int result;
728 u_int32_t max_lease_time=0;
729
730 received_requested_address=FALSE;
731
732 /* checks responses from requested servers */
733 requested_responses=0;
734 if(requested_servers>0){
735
736 for(temp_server=requested_server_list;temp_server!=NULL;temp_server=temp_server->next){
737
738 for(temp_offer=dhcp_offer_list;temp_offer!=NULL;temp_offer=temp_offer->next){
739
740 /* get max lease time we were offered */
741 if(temp_offer->lease_time>max_lease_time || temp_offer->lease_time==DHCP_INFINITE_TIME)
742 max_lease_time=temp_offer->lease_time;
743
744 /* see if we got the address we requested */
745 if(!memcmp(&requested_address,&temp_offer->offered_address,sizeof(requested_address)))
746 received_requested_address=TRUE;
747
748 /* see if the servers we wanted a response from talked to us or not */
749 if(!memcmp(&temp_offer->server_address,&temp_server->server_address,sizeof(temp_server->server_address))){
750#ifdef DEBUG
751 printf("DHCP Server Match: Offerer=%s",inet_ntoa(temp_offer->server_address));
752 printf(" Requested=%s\n",inet_ntoa(temp_server->server_address));
753#endif
754 requested_responses++;
755 }
756 }
757 }
758
759 }
760
761 /* else check and see if we got our requested address from any server */
762 else{
763
764 for(temp_offer=dhcp_offer_list;temp_offer!=NULL;temp_offer=temp_offer->next){
765
766 /* get max lease time we were offered */
767 if(temp_offer->lease_time>max_lease_time || temp_offer->lease_time==DHCP_INFINITE_TIME)
768 max_lease_time=temp_offer->lease_time;
769
770 /* see if we got the address we requested */
771 if(!memcmp(&requested_address,&temp_offer->offered_address,sizeof(requested_address)))
772 received_requested_address=TRUE;
773 }
774 }
775
776 result=STATE_OK;
777 if(valid_responses==0)
778 result=STATE_CRITICAL;
779 else if(requested_servers>0 && requested_responses==0)
780 result=STATE_CRITICAL;
781 else if(requested_responses<requested_servers)
782 result=STATE_WARNING;
783 else if(request_specific_address==TRUE && received_requested_address==FALSE)
784 result=STATE_WARNING;
785
786
787 printf("DHCP %s: ",(result==STATE_OK)?"ok":"problem");
788
789 /* we didn't receive any DHCPOFFERs */
790 if(dhcp_offer_list==NULL){
791 printf("No DHCPOFFERs were received.\n");
792 return result;
793 }
794
795 printf("Received %d DHCPOFFER(s)",valid_responses);
796
797 if(requested_servers>0)
798 printf(", %s%d of %d requested servers responded",((requested_responses<requested_servers) && requested_responses>0)?"only ":"",requested_responses,requested_servers);
799
800 if(request_specific_address==TRUE)
801 printf(", requested address (%s) was %soffered",inet_ntoa(requested_address),(received_requested_address==TRUE)?"":"not ");
802
803 printf(", max lease time = ");
804 if(max_lease_time==DHCP_INFINITE_TIME)
805 printf("Infinity");
806 else
807 printf("%lu sec",(unsigned long)max_lease_time);
808
809 printf(".\n");
810
811 return result;
812 }
813
814
815
816
817
818
819/* print usage help */
820void print_help(void){
821
822 /*print_revision(progname,"$Revision$");*/
823
824 printf("Copyright (c) 2001-2004 Ethan Galstad (nagios@nagios.org)\n\n");
825 printf("This plugin tests the availability of DHCP servers on a network.\n\n");
826
827 print_usage();
828
829 printf
830 ("\nOptions:\n"
831 " -s, --serverip=IPADDRESS\n"
832 " IP address of DHCP server that we must hear from\n"
833 " -r, --requestedip=IPADDRESS\n"
834 " IP address that should be offered by at least one DHCP server\n"
835 " -t, --timeout=INTEGER\n"
836 " Seconds to wait for DHCPOFFER before timeout occurs\n"
837 " -i, --interface=STRING\n"
838 " Interface to to use for listening (i.e. eth0)\n"
839 " -v, --verbose\n"
840 " Print extra information (command-line use only)\n"
841 " -h, --help\n"
842 " Print detailed help screen\n"
843 " -V, --version\n"
844 " Print version information\n\n"
845 );
846
847 /*support();*/
848
849 return;
850 }
851
852
853/* prints usage information */
854void print_usage(void){
855
856 printf("Usage: %s [-s serverip] [-r requestedip] [-t timeout] [-i interface]\n",progname);
857 printf(" %s --help\n",progname);
858 printf(" %s --version\n",progname);
859
860 return;
861 }
862
863
864
865
866/* process command-line arguments */
867int process_arguments(int argc, char **argv){
868 int c;
869
870 if(argc<1)
871 return ERROR;
872
873 c=0;
874 while((c+=(call_getopt(argc-c,&argv[c])))<argc){
875
876 /*
877 if(is_option(argv[c]))
878 continue;
879 */
880 }
881
882 return validate_arguments();
883 }
884
885
886
887int call_getopt(int argc, char **argv){
888 int c=0;
889 int i=0;
890 struct in_addr ipaddress;
891
892#ifdef HAVE_GETOPT_H
893 int option_index = 0;
894 static struct option long_options[] =
895 {
896 {"serverip", required_argument,0,'s'},
897 {"requestedip", required_argument,0,'r'},
898 {"timeout", required_argument,0,'t'},
899 {"interface", required_argument,0,'i'},
900 {"verbose", no_argument, 0,'v'},
901 {"version", no_argument, 0,'V'},
902 {"help", no_argument, 0,'h'},
903 {0,0,0,0}
904 };
905#endif
906
907 while(1){
908#ifdef HAVE_GETOPT_H
909 c=getopt_long(argc,argv,"+hVvt:s:r:t:i:",long_options,&option_index);
910#else
911 c=getopt(argc,argv,"+?hVvt:s:r:t:i:");
912#endif
913
914 i++;
915
916 if(c==-1||c==EOF||c==1)
917 break;
918
919 switch(c){
920 case 'w':
921 case 'r':
922 case 't':
923 case 'i':
924 i++;
925 break;
926 default:
927 break;
928 }
929
930 switch(c){
931
932 case 's': /* DHCP server address */
933 if(inet_aton(optarg,&ipaddress))
934 add_requested_server(ipaddress);
935 /*
936 else
937 usage("Invalid server IP address\n");
938 */
939 break;
940
941 case 'r': /* address we are requested from DHCP servers */
942 if(inet_aton(optarg,&ipaddress)){
943 requested_address=ipaddress;
944 request_specific_address=TRUE;
945 }
946 /*
947 else
948 usage("Invalid requested IP address\n");
949 */
950 break;
951
952 case 't': /* timeout */
953
954 /*
955 if(is_intnonneg(optarg))
956 */
957 if(atoi(optarg)>0)
958 dhcpoffer_timeout=atoi(optarg);
959 /*
960 else
961 usage("Time interval must be a nonnegative integer\n");
962 */
963 break;
964
965 case 'i': /* interface name */
966
967 strncpy(network_interface_name,optarg,sizeof(network_interface_name)-1);
968 network_interface_name[sizeof(network_interface_name)-1]='\x0';
969
970 break;
971
972 case 'V': /* version */
973
974 /*print_revision(progname,"$Revision$");*/
975 exit(STATE_OK);
976
977 case 'h': /* help */
978
979 print_help();
980 exit(STATE_OK);
981
982 case '?': /* help */
983
984 /*usage("Invalid argument\n");*/
985 break;
986
987 default:
988 break;
989 }
990 }
991
992 return i;
993 }
994
995
996
997int validate_arguments(void){
998
999 return OK;
1000 }
1001
diff --git a/contrib/tarballs/check_icmp-0.8.tar.gz b/contrib/tarballs/check_icmp-0.8.tar.gz
deleted file mode 100644
index 2ee5db01..00000000
--- a/contrib/tarballs/check_icmp-0.8.tar.gz
+++ /dev/null
Binary files differ