plugins-root/check_dhcp.c

   1 /******************************************************************************
   2 *
   3 * Nagios check_dhcp plugin
   4 *
   5 * License: GPL
   6 * Copyright (c) 2001-2004 Ethan Galstad (nagios@nagios.org)
   7 * Copyright (c) 2001-2006 Nagios Plugin Development Team
   8 *
   9 * Last Modified: $Date$
  10 *
  11 * Description:
  12 *
  13 * This file contains the check_dhcp plugin
  14 *
  15 *  This plugin tests the availability of DHCP servers on a network.
  16 *
  17 *
  18 * License Information:
  19 *
  20 * This program is free software; you can redistribute it and/or modify
  21 * it under the terms of the GNU General Public License as published by
  22 * the Free Software Foundation; either version 2 of the License, or
  23 * (at your option) any later version.
  24 *
  25 * This program is distributed in the hope that it will be useful,
  26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  28 * GNU General Public License for more details.
  29 *
  30 * You should have received a copy of the GNU General Public License
  31 * along with this program; if not, write to the Free Software
  32 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  33 *
  34 * $Id$
  35 *
  36 * ------------------------------------------------------------------------
  37 * Unicast mode was originally implemented by Heiti of Boras Kommun with
  38 * general improvements as well as usability fixes and "forward"-porting by
  39 * Andreas Ericsson of OP5 AB.
  40 * ------------------------------------------------------------------------
  41 *
  42 *****************************************************************************/
  43
  44 const char *progname = "check_dhcp";
  45 const char *revision = "$Revision$";
  46 const char *copyright = "2001-2006";
  47 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  48
  49 #include "common.h"
  50 #include "netutils.h"
  51 #include "utils.h"
  52
  53 #include <stdio.h>
  54 #include <stdlib.h>
  55 #include <string.h>
  56 #include <errno.h>
  57 #include <unistd.h>
  58 #include <sys/time.h>
  59 #include <sys/ioctl.h>
  60 #include <fcntl.h>
  61 #include <getopt.h>
  62 #include <sys/socket.h>
  63 #include <sys/types.h>
  64 #include <netdb.h>
  65 #include <netinet/in.h>
  66 #include <net/if.h>
  67 #include <arpa/inet.h>
  68 #if HAVE_SYS_SOCKIO_H
  69 #include <sys/sockio.h>
  70 #endif
  71
  72 #if defined( __linux__ )
  73
  74 #include <linux/if_ether.h>
  75 #include <features.h>
  76
  77 #elif defined (__bsd__)
  78
  79 #include <netinet/if_ether.h>
  80 #include <sys/param.h>
  81 #include <sys/sysctl.h>
  82 #include <net/if_dl.h>
  83
  84 #elif defined(__sun__) || defined(__solaris__) || defined(__hpux__)
  85
  86 #define INSAP 22
  87 #define OUTSAP 24
  88
  89 #include <signal.h>
  90 #include <ctype.h>
  91 #include <sys/stropts.h>
  92 #include <sys/poll.h>
  93 #include <sys/dlpi.h>
  94
  95 #define bcopy(source, destination, length) memcpy(destination, source, length)
  96
  97 #define AREA_SZ 5000            /* buffer length in bytes */
  98 static u_long ctl_area[AREA_SZ];
  99 static u_long dat_area[AREA_SZ];
 100 static struct strbuf ctl = {AREA_SZ, 0, (char *)ctl_area};
 101 static struct strbuf dat = {AREA_SZ, 0, (char *)dat_area};
 102
 103 #define GOT_CTRL 1
 104 #define GOT_DATA 2
 105 #define GOT_BOTH 3
 106 #define GOT_INTR 4
 107 #define GOT_ERR 128
 108
 109 #define u_int8_t         uint8_t
 110 #define u_int16_t       uint16_t
 111 #define u_int32_t       uint32_t
 112
 113 static int get_msg(int);
 114 static int check_ctrl(int);
 115 static int put_ctrl(int, int, int);
 116 static int put_both(int, int, int, int);
 117 static int dl_open(const char *, int, int *);
 118 static int dl_bind(int, int, u_char *);
 119 long mac_addr_dlpi( const char *, int, u_char *);
 120
 121 #endif
 122
 123
 124
 125 /**** Common definitions ****/
 126
 127 #define OK                0
 128 #define ERROR             -1
 129
 130 #define FALSE             0
 131 #define TRUE              1
 132
 133
 134 /**** DHCP definitions ****/
 135
 136 #define MAX_DHCP_CHADDR_LENGTH           16
 137 #define MAX_DHCP_SNAME_LENGTH            64
 138 #define MAX_DHCP_FILE_LENGTH             128
 139 #define MAX_DHCP_OPTIONS_LENGTH          312
 140
 141
 142 typedef struct dhcp_packet_struct{
 143         u_int8_t  op;                   /* packet type */
 144         u_int8_t  htype;                /* type of hardware address for this machine (Ethernet, etc) */
 145         u_int8_t  hlen;                 /* length of hardware address (of this machine) */
 146         u_int8_t  hops;                 /* hops */
 147         u_int32_t xid;                  /* random transaction id number - chosen by this machine */
 148         u_int16_t secs;                 /* seconds used in timing */
 149         u_int16_t flags;                /* flags */
 150         struct in_addr ciaddr;          /* IP address of this machine (if we already have one) */
 151         struct in_addr yiaddr;          /* IP address of this machine (offered by the DHCP server) */
 152         struct in_addr siaddr;          /* IP address of DHCP server */
 153         struct in_addr giaddr;          /* IP address of DHCP relay */
 154         unsigned char chaddr [MAX_DHCP_CHADDR_LENGTH];      /* hardware address of this machine */
 155         char sname [MAX_DHCP_SNAME_LENGTH];    /* name of DHCP server */
 156         char file [MAX_DHCP_FILE_LENGTH];      /* boot file name (used for diskless booting?) */
 157         char options[MAX_DHCP_OPTIONS_LENGTH];  /* options */
 158         }dhcp_packet;
 159
 160
 161 typedef struct dhcp_offer_struct{
 162         struct in_addr server_address;   /* address of DHCP server that sent this offer */
 163         struct in_addr offered_address;  /* the IP address that was offered to us */
 164         u_int32_t lease_time;            /* lease time in seconds */
 165         u_int32_t renewal_time;          /* renewal time in seconds */
 166         u_int32_t rebinding_time;        /* rebinding time in seconds */
 167         struct dhcp_offer_struct *next;
 168         }dhcp_offer;
 169
 170
 171 typedef struct requested_server_struct{
 172         struct in_addr server_address;
 173         int answered;
 174         struct requested_server_struct *next;
 175         }requested_server;
 176
 177
 178 #define BOOTREQUEST     1
 179 #define BOOTREPLY       2
 180
 181 #define DHCPDISCOVER    1
 182 #define DHCPOFFER       2
 183 #define DHCPREQUEST     3
 184 #define DHCPDECLINE     4
 185 #define DHCPACK         5
 186 #define DHCPNACK        6
 187 #define DHCPRELEASE     7
 188
 189 #define DHCP_OPTION_MESSAGE_TYPE        53
 190 #define DHCP_OPTION_HOST_NAME           12
 191 #define DHCP_OPTION_BROADCAST_ADDRESS   28
 192 #define DHCP_OPTION_REQUESTED_ADDRESS   50
 193 #define DHCP_OPTION_LEASE_TIME          51
 194 #define DHCP_OPTION_SERVER_IDENTIFIER   54
 195 #define DHCP_OPTION_RENEWAL_TIME        58
 196 #define DHCP_OPTION_REBINDING_TIME      59
 197 #define DHCP_OPTION_END                 255
 198
 199 #define DHCP_INFINITE_TIME              0xFFFFFFFF
 200
 201 #define DHCP_BROADCAST_FLAG 32768
 202 #define DHCP_UNICAST_FLAG   0
 203
 204 #define DHCP_SERVER_PORT   67
 205 #define DHCP_CLIENT_PORT   68
 206
 207 #define ETHERNET_HARDWARE_ADDRESS            1     /* used in htype field of dhcp packet */
 208 #define ETHERNET_HARDWARE_ADDRESS_LENGTH     6     /* length of Ethernet hardware addresses */
 209
 210 u_int8_t unicast = 0;        /* unicast mode: mimic a DHCP relay */
 211 struct in_addr my_ip;        /* our address (required for relay) */
 212 struct in_addr dhcp_ip;      /* server to query (if in unicast mode) */
 213 unsigned char client_hardware_address[MAX_DHCP_CHADDR_LENGTH]="";
 214
 215 char network_interface_name[IFNAMSIZ]="eth0";
 216
 217 u_int32_t packet_xid=0;
 218
 219 u_int32_t dhcp_lease_time=0;
 220 u_int32_t dhcp_renewal_time=0;
 221 u_int32_t dhcp_rebinding_time=0;
 222
 223 int dhcpoffer_timeout=2;
 224
 225 dhcp_offer *dhcp_offer_list=NULL;
 226 requested_server *requested_server_list=NULL;
 227
 228 int valid_responses=0;     /* number of valid DHCPOFFERs we received */
 229 int requested_servers=0;
 230 int requested_responses=0;
 231
 232 int request_specific_address=FALSE;
 233 int received_requested_address=FALSE;
 234 int verbose=0;
 235 struct in_addr requested_address;
 236
 237
 238 int process_arguments(int, char **);
 239 int call_getopt(int, char **);
 240 int validate_arguments(void);
 241 void print_usage(void);
 242 void print_help(void);
 243
 244 int get_hardware_address(int,char *);
 245 int get_ip_address(int,char *);
 246
 247 int send_dhcp_discover(int);
 248 int get_dhcp_offer(int);
 249
 250 int get_results(void);
 251
 252 int add_dhcp_offer(struct in_addr,dhcp_packet *);
 253 int free_dhcp_offer_list(void);
 254 int free_requested_server_list(void);
 255
 256 int create_dhcp_socket(void);
 257 int close_dhcp_socket(int);
 258 int send_dhcp_packet(void *,int,int,struct sockaddr_in *);
 259 int receive_dhcp_packet(void *,int,int,int,struct sockaddr_in *);
 260
 261
 262
 263 int main(int argc, char **argv){
 264         int dhcp_socket;
 265         int result = STATE_UNKNOWN;
 266
 267         /* this plugin almost certainly needs root permissions. */
 268         np_warn_if_not_root();
 269
 270         setlocale (LC_ALL, "");
 271         bindtextdomain (PACKAGE, LOCALEDIR);
 272         textdomain (PACKAGE);
 273
 274         if(process_arguments(argc,argv)!=OK){
 275                 usage4 (_("Could not parse arguments"));
 276                 }
 277
 278         /* create socket for DHCP communications */
 279         dhcp_socket=create_dhcp_socket();
 280
 281         /* get hardware address of client machine */
 282         get_hardware_address(dhcp_socket,network_interface_name);
 283
 284         if(unicast) /* get IP address of client machine */
 285                 get_ip_address(dhcp_socket,network_interface_name);
 286
 287         /* send DHCPDISCOVER packet */
 288         send_dhcp_discover(dhcp_socket);
 289
 290         /* wait for a DHCPOFFER packet */
 291         get_dhcp_offer(dhcp_socket);
 292
 293         /* close socket we created */
 294         close_dhcp_socket(dhcp_socket);
 295
 296         /* determine state/plugin output to return */
 297         result=get_results();
 298
 299         /* free allocated memory */
 300         free_dhcp_offer_list();
 301         free_requested_server_list();
 302
 303         return result;
 304         }
 305
 306
 307
 308 /* determines hardware address on client machine */
 309 int get_hardware_address(int sock,char *interface_name){
 310
 311         int i;
 312
 313 #if defined(__linux__)
 314         struct ifreq ifr;
 315
 316         strncpy((char *)&ifr.ifr_name,interface_name,sizeof(ifr.ifr_name));
 317
 318         /* try and grab hardware address of requested interface */
 319         if(ioctl(sock,SIOCGIFHWADDR,&ifr)<0){
 320                 printf(_("Error: Could not get hardware address of interface '%s'\n"),interface_name);
 321                 exit(STATE_UNKNOWN);
 322                 }
 323
 324         memcpy(&client_hardware_address[0],&ifr.ifr_hwaddr.sa_data,6);
 325
 326 #elif defined(__bsd__)
 327                                                 /* King 2004    see ACKNOWLEDGEMENTS */
 328
 329         int                     mib[6], len;
 330         char                    *buf;
 331         unsigned char           *ptr;
 332         struct if_msghdr        *ifm;
 333         struct sockaddr_dl      *sdl;
 334
 335         mib[0] = CTL_NET;
 336         mib[1] = AF_ROUTE;
 337         mib[2] = 0;
 338         mib[3] = AF_LINK;
 339         mib[4] = NET_RT_IFLIST;
 340
 341         if((mib[5] = if_nametoindex(interface_name)) == 0){
 342                 printf(_("Error: if_nametoindex error - %s.\n"), strerror(errno));
 343                 exit(STATE_UNKNOWN);
 344                 }
 345
 346         if(sysctl(mib, 6, NULL, &len, NULL, 0) < 0){
 347                 printf(_("Error: Couldn't get hardware address from %s. sysctl 1 error - %s.\n"), interface_name, strerror(errno));
 348                 exit(STATE_UNKNOWN);
 349                 }
 350
 351         if((buf = malloc(len)) == NULL){
 352                 printf(_("Error: Couldn't get hardware address from interface %s. malloc error - %s.\n"), interface_name, strerror(errno));
 353                 exit(4);
 354                 }
 355
 356         if(sysctl(mib, 6, buf, &len, NULL, 0) < 0){
 357                 printf(_("Error: Couldn't get hardware address from %s. sysctl 2 error - %s.\n"), interface_name, strerror(errno));
 358                 exit(STATE_UNKNOWN);
 359                 }
 360
 361         ifm = (struct if_msghdr *)buf;
 362         sdl = (struct sockaddr_dl *)(ifm + 1);
 363         ptr = (unsigned char *)LLADDR(sdl);
 364         memcpy(&client_hardware_address[0], ptr, 6) ;
 365                                                 /* King 2004 */
 366
 367 #elif defined(__sun__) || defined(__solaris__)
 368
 369                                                 /* Kompf 2000-2003      see ACKNOWLEDGEMENTS */
 370         long stat;
 371         char dev[20] = "/dev/";
 372         char *p;
 373         int unit;
 374
 375         for(p = interface_name; *p && isalpha(*p); p++)
 376                 /* no-op */ ;
 377         if( p != '\0' ){
 378                 unit = atoi(p) ;
 379                 *p = '\0' ;
 380                 strncat(dev, interface_name, 6) ;
 381                 }
 382         else{
 383                 printf(_("Error: can't find unit number in interface_name (%s) - expecting TypeNumber eg lnc0.\n"), interface_name);
 384                 exit(STATE_UNKNOWN);
 385                 }
 386         stat = mac_addr_dlpi(dev, unit, client_hardware_address);
 387         if(stat != 0){
 388                 printf(_("Error: can't read MAC address from DLPI streams interface for device %s unit %d.\n"), dev, unit);
 389                 exit(STATE_UNKNOWN);
 390                 }
 391
 392 #elif defined(__hpux__)
 393
 394         long stat;
 395         char dev[20] = "/dev/dlpi" ;
 396         int unit = 0;
 397
 398         stat = mac_addr_dlpi(dev, unit, client_hardware_address);
 399         if(stat != 0){
 400                 printf(_("Error: can't read MAC address from DLPI streams interface for device %s unit %d.\n"), dev, unit);
 401                 exit(STATE_UNKNOWN);
 402                 }
 403                                                 /* Kompf 2000-2003 */
 404
 405 #else
 406         printf(_("Error: can't get MAC address for this architecture.\n"));
 407         exit(STATE_UNKNOWN);
 408 #endif
 409
 410         if(verbose){
 411                 printf(_("Hardware address: "));
 412                 for (i=0; i<6; ++i)
 413                         printf("%2.2x", client_hardware_address[i]);
 414                 printf( "\n");
 415                 }
 416
 417         return OK;
 418         }
 419
 420 /* determines IP address of the client interface */
 421 int get_ip_address(int sock,char *interface_name){
 422 #if defined(SIOCGIFADDR)
 423         struct ifreq ifr;
 424
 425         strncpy((char *)&ifr.ifr_name,interface_name,sizeof(ifr.ifr_name)-1);
 426         ifr.ifr_name[sizeof(ifr.ifr_name)-1]='\0';
 427
 428         if(ioctl(sock,SIOCGIFADDR,&ifr)<0){
 429                 printf(_("Error: Cannot determine IP address of interface %s\n"),
 430                         interface_name);
 431                 exit(STATE_UNKNOWN);
 432                 }
 433
 434         my_ip=((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr;
 435
 436 #else
 437         printf(_("Error: Cannot get interface IP address on this platform.\n"));
 438         exit(STATE_UNKNOWN);
 439 #endif
 440
 441         if(verbose)
 442                 printf(_("Pretending to be relay client %s\n"),inet_ntoa(my_ip));
 443
 444         return OK;
 445         }
 446
 447 /* sends a DHCPDISCOVER broadcast message in an attempt to find DHCP servers */
 448 int send_dhcp_discover(int sock){
 449         dhcp_packet discover_packet;
 450         struct sockaddr_in sockaddr_broadcast;
 451     unsigned short opts;
 452
 453
 454         /* clear the packet data structure */
 455         bzero(&discover_packet,sizeof(discover_packet));
 456
 457
 458         /* boot request flag (backward compatible with BOOTP servers) */
 459         discover_packet.op=BOOTREQUEST;
 460
 461         /* hardware address type */
 462         discover_packet.htype=ETHERNET_HARDWARE_ADDRESS;
 463
 464         /* length of our hardware address */
 465         discover_packet.hlen=ETHERNET_HARDWARE_ADDRESS_LENGTH;
 466
 467         /* transaction id is supposed to be random */
 468         srand(time(NULL));
 469         packet_xid=random();
 470         discover_packet.xid=htonl(packet_xid);
 471
 472         /**** WHAT THE HECK IS UP WITH THIS?!?  IF I DON'T MAKE THIS CALL, ONLY ONE SERVER RESPONSE IS PROCESSED!!!! ****/
 473         /* downright bizzarre... */
 474         ntohl(discover_packet.xid);
 475
 476         /*discover_packet.secs=htons(65535);*/
 477         discover_packet.secs=0xFF;
 478
 479         /*
 480          * server needs to know if it should broadcast or unicast its response:
 481          * 0x8000L == 32768 == 1 << 15 == broadcast, 0 == unicast
 482          */
 483         discover_packet.flags = unicast ? 0 : htons(DHCP_BROADCAST_FLAG);
 484
 485         /* our hardware address */
 486         memcpy(discover_packet.chaddr,client_hardware_address,ETHERNET_HARDWARE_ADDRESS_LENGTH);
 487
 488         /* first four bytes of options field is magic cookie (as per RFC 2132) */
 489         discover_packet.options[0]='\x63';
 490         discover_packet.options[1]='\x82';
 491         discover_packet.options[2]='\x53';
 492         discover_packet.options[3]='\x63';
 493
 494     opts = 4;
 495         /* DHCP message type is embedded in options field */
 496         discover_packet.options[opts++]=DHCP_OPTION_MESSAGE_TYPE;    /* DHCP message type option identifier */
 497         discover_packet.options[opts++]='\x01';               /* DHCP message option length in bytes */
 498         discover_packet.options[opts++]=DHCPDISCOVER;
 499
 500         /* the IP address we're requesting */
 501         if(request_specific_address==TRUE){
 502                 discover_packet.options[opts++]=DHCP_OPTION_REQUESTED_ADDRESS;
 503                 discover_packet.options[opts++]='\x04';
 504                 memcpy(&discover_packet.options[opts],&requested_address,sizeof(requested_address));
 505                 opts += sizeof(requested_address);
 506                 }
 507         discover_packet.options[opts++]=DHCP_OPTION_END;
 508
 509         /* unicast fields */
 510         if(unicast)
 511                 discover_packet.giaddr.s_addr = my_ip.s_addr;
 512
 513         /* see RFC 1542, 4.1.1 */
 514         discover_packet.hops = unicast ? 1 : 0;
 515
 516         /* send the DHCPDISCOVER packet to broadcast address */
 517         sockaddr_broadcast.sin_family=AF_INET;
 518         sockaddr_broadcast.sin_port=htons(DHCP_SERVER_PORT);
 519         sockaddr_broadcast.sin_addr.s_addr = unicast ? dhcp_ip.s_addr : INADDR_BROADCAST;
 520         bzero(&sockaddr_broadcast.sin_zero,sizeof(sockaddr_broadcast.sin_zero));
 521
 522
 523         if(verbose){
 524                 printf(_("DHCPDISCOVER to %s port %d\n"),inet_ntoa(sockaddr_broadcast.sin_addr),ntohs(sockaddr_broadcast.sin_port));
 525                 printf("DHCPDISCOVER XID: %lu (0x%X)\n",ntohl(discover_packet.xid),ntohl(discover_packet.xid));
 526                 printf("DHCDISCOVER ciaddr:  %s\n",inet_ntoa(discover_packet.ciaddr));
 527                 printf("DHCDISCOVER yiaddr:  %s\n",inet_ntoa(discover_packet.yiaddr));
 528                 printf("DHCDISCOVER siaddr:  %s\n",inet_ntoa(discover_packet.siaddr));
 529                 printf("DHCDISCOVER giaddr:  %s\n",inet_ntoa(discover_packet.giaddr));
 530                 }
 531
 532         /* send the DHCPDISCOVER packet out */
 533         send_dhcp_packet(&discover_packet,sizeof(discover_packet),sock,&sockaddr_broadcast);
 534
 535         if(verbose)
 536                 printf("\n\n");
 537
 538         return OK;
 539         }
 540
 541
 542
 543
 544 /* waits for a DHCPOFFER message from one or more DHCP servers */
 545 int get_dhcp_offer(int sock){
 546         dhcp_packet offer_packet;
 547         struct sockaddr_in source;
 548         struct sockaddr_in via;
 549         int result=OK;
 550         int responses=0;
 551         int x;
 552         time_t start_time;
 553         time_t current_time;
 554
 555         time(&start_time);
 556
 557         /* receive as many responses as we can */
 558         for(responses=0,valid_responses=0;;){
 559
 560                 time(&current_time);
 561                 if((current_time-start_time)>=dhcpoffer_timeout)
 562                         break;
 563
 564                 if(verbose)
 565                         printf("\n\n");
 566
 567                 bzero(&source,sizeof(source));
 568                 bzero(&via,sizeof(via));
 569                 bzero(&offer_packet,sizeof(offer_packet));
 570
 571                 result=OK;
 572                 result=receive_dhcp_packet(&offer_packet,sizeof(offer_packet),sock,dhcpoffer_timeout,&source);
 573
 574                 if(result!=OK){
 575                         if(verbose)
 576                                 printf(_("Result=ERROR\n"));
 577
 578                         continue;
 579                         }
 580                 else{
 581                         if(verbose)
 582                                 printf(_("Result=OK\n"));
 583
 584                         responses++;
 585                         }
 586
 587                 /* The "source" is either a server or a relay. */
 588                 /* Save a copy of "source" into "via" even if it's via itself */
 589                 memcpy(&via,&source,sizeof(source)) ;
 590
 591                 /* If siaddr is non-zero, set "source" to siaddr */
 592                 if(offer_packet.siaddr.s_addr != 0L){
 593                         source.sin_addr.s_addr = offer_packet.siaddr.s_addr ;
 594                         }
 595
 596                 if(verbose){
 597                         printf(_("DHCPOFFER from IP address %s"),inet_ntoa(source.sin_addr));
 598                         printf(_(" via %s\n"),inet_ntoa(via.sin_addr));
 599                         printf("DHCPOFFER XID: %lu (0x%X)\n",ntohl(offer_packet.xid),ntohl(offer_packet.xid));
 600                         }
 601
 602                 /* check packet xid to see if its the same as the one we used in the discover packet */
 603                 if(ntohl(offer_packet.xid)!=packet_xid){
 604                         if(verbose)
 605                                 printf(_("DHCPOFFER XID (%lu) did not match DHCPDISCOVER XID (%lu) - ignoring packet\n"),ntohl(offer_packet.xid),packet_xid);
 606
 607                         continue;
 608                         }
 609
 610                 /* check hardware address */
 611                 result=OK;
 612                 if(verbose)
 613                         printf("DHCPOFFER chaddr: ");
 614
 615                 for(x=0;x<ETHERNET_HARDWARE_ADDRESS_LENGTH;x++){
 616                         if(verbose)
 617                                 printf("%02X",(unsigned char)offer_packet.chaddr[x]);
 618
 619                         if(offer_packet.chaddr[x]!=client_hardware_address[x])
 620                                 result=ERROR;
 621                         }
 622                 if(verbose)
 623                         printf("\n");
 624
 625                 if(result==ERROR){
 626                         if(verbose)
 627                                 printf(_("DHCPOFFER hardware address did not match our own - ignoring packet\n"));
 628
 629                         continue;
 630                         }
 631
 632                 if(verbose){
 633                         printf("DHCPOFFER ciaddr: %s\n",inet_ntoa(offer_packet.ciaddr));
 634                         printf("DHCPOFFER yiaddr: %s\n",inet_ntoa(offer_packet.yiaddr));
 635                         printf("DHCPOFFER siaddr: %s\n",inet_ntoa(offer_packet.siaddr));
 636                         printf("DHCPOFFER giaddr: %s\n",inet_ntoa(offer_packet.giaddr));
 637                         }
 638
 639                 add_dhcp_offer(source.sin_addr,&offer_packet);
 640
 641                 valid_responses++;
 642                 }
 643
 644         if(verbose){
 645                 printf(_("Total responses seen on the wire: %d\n"),responses);
 646                 printf(_("Valid responses for this machine: %d\n"),valid_responses);
 647                 }
 648
 649         return OK;
 650         }
 651
 652
 653
 654 /* sends a DHCP packet */
 655 int send_dhcp_packet(void *buffer, int buffer_size, int sock, struct sockaddr_in *dest){
 656         int result;
 657
 658         result=sendto(sock,(char *)buffer,buffer_size,0,(struct sockaddr *)dest,sizeof(*dest));
 659
 660         if(verbose)
 661                 printf(_("send_dhcp_packet result: %d\n"),result);
 662
 663         if(result<0)
 664                 return ERROR;
 665
 666         return OK;
 667         }
 668
 669
 670
 671 /* receives a DHCP packet */
 672 int receive_dhcp_packet(void *buffer, int buffer_size, int sock, int timeout, struct sockaddr_in *address){
 673         struct timeval tv;
 674         fd_set readfds;
 675         int recv_result;
 676         socklen_t address_size;
 677         struct sockaddr_in source_address;
 678
 679
 680         /* wait for data to arrive (up time timeout) */
 681         tv.tv_sec=timeout;
 682         tv.tv_usec=0;
 683         FD_ZERO(&readfds);
 684         FD_SET(sock,&readfds);
 685         select(sock+1,&readfds,NULL,NULL,&tv);
 686
 687         /* make sure some data has arrived */
 688         if(!FD_ISSET(sock,&readfds)){
 689                 if(verbose)
 690                         printf(_("No (more) data received\n"));
 691                 return ERROR;
 692                 }
 693
 694         else{
 695
 696                 /* 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
 697                    not being interpreted correctly.  sigh... */
 698                 bzero(&source_address,sizeof(source_address));
 699                 address_size=sizeof(source_address);
 700                 recv_result=recvfrom(sock,(char *)buffer,buffer_size,MSG_PEEK,(struct sockaddr *)&source_address,&address_size);
 701                 if(verbose)
 702                         printf("recv_result_1: %d\n",recv_result);
 703                 recv_result=recvfrom(sock,(char *)buffer,buffer_size,0,(struct sockaddr *)&source_address,&address_size);
 704                 if(verbose)
 705                         printf("recv_result_2: %d\n",recv_result);
 706
 707                 if(recv_result==-1){
 708                         if(verbose){
 709                                 printf(_("recvfrom() failed, "));
 710                                 printf("errno: (%d) -> %s\n",errno,strerror(errno));
 711                                 }
 712                         return ERROR;
 713                         }
 714                 else{
 715                         if(verbose){
 716                                 printf(_("receive_dhcp_packet() result: %d\n"),recv_result);
 717                                 printf(_("receive_dhcp_packet() source: %s\n"),inet_ntoa(source_address.sin_addr));
 718                                 }
 719
 720                         memcpy(address,&source_address,sizeof(source_address));
 721                         return OK;
 722                         }
 723                 }
 724
 725         return OK;
 726         }
 727
 728
 729 /* creates a socket for DHCP communication */
 730 int create_dhcp_socket(void){
 731         struct sockaddr_in myname;
 732         struct ifreq interface;
 733         int sock;
 734         int flag=1;
 735
 736         /* Set up the address we're going to bind to. */
 737         bzero(&myname,sizeof(myname));
 738         myname.sin_family=AF_INET;
 739         /* listen to DHCP server port if we're in unicast mode */
 740         myname.sin_port = htons(unicast ? DHCP_SERVER_PORT : DHCP_CLIENT_PORT);
 741         myname.sin_addr.s_addr = unicast ? my_ip.s_addr : INADDR_ANY;
 742         bzero(&myname.sin_zero,sizeof(myname.sin_zero));
 743
 744         /* create a socket for DHCP communications */
 745         sock=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
 746         if(sock<0){
 747                 printf(_("Error: Could not create socket!\n"));
 748                 exit(STATE_UNKNOWN);
 749                 }
 750
 751         if(verbose)
 752                 printf("DHCP socket: %d\n",sock);
 753
 754         /* set the reuse address flag so we don't get errors when restarting */
 755         flag=1;
 756         if(setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(char *)&flag,sizeof(flag))<0){
 757                 printf(_("Error: Could not set reuse address option on DHCP socket!\n"));
 758                 exit(STATE_UNKNOWN);
 759                 }
 760
 761         /* set the broadcast option - we need this to listen to DHCP broadcast messages */
 762         if(setsockopt(sock,SOL_SOCKET,SO_BROADCAST,(char *)&flag,sizeof flag)<0){
 763                 printf(_("Error: Could not set broadcast option on DHCP socket!\n"));
 764                 exit(STATE_UNKNOWN);
 765                 }
 766
 767         /* bind socket to interface */
 768 #if defined(__linux__)
 769         strncpy(interface.ifr_ifrn.ifrn_name,network_interface_name,IFNAMSIZ);
 770         if(setsockopt(sock,SOL_SOCKET,SO_BINDTODEVICE,(char *)&interface,sizeof(interface))<0){
 771                 printf(_("Error: Could not bind socket to interface %s.  Check your privileges...\n"),network_interface_name);
 772                 exit(STATE_UNKNOWN);
 773                 }
 774
 775 #else
 776         strncpy(interface.ifr_name,network_interface_name,IFNAMSIZ);
 777 #endif
 778
 779         /* bind the socket */
 780         if(bind(sock,(struct sockaddr *)&myname,sizeof(myname))<0){
 781                 printf(_("Error: Could not bind to DHCP socket (port %d)!  Check your privileges...\n"),DHCP_CLIENT_PORT);
 782                 exit(STATE_UNKNOWN);
 783                 }
 784
 785         return sock;
 786         }
 787
 788
 789 /* closes DHCP socket */
 790 int close_dhcp_socket(int sock){
 791
 792         close(sock);
 793
 794         return OK;
 795         }
 796
 797
 798 /* adds a requested server address to list in memory */
 799 int add_requested_server(struct in_addr server_address){
 800         requested_server *new_server;
 801
 802         new_server=(requested_server *)malloc(sizeof(requested_server));
 803         if(new_server==NULL)
 804                 return ERROR;
 805
 806         new_server->server_address=server_address;
 807         new_server->answered=FALSE;
 808
 809         new_server->next=requested_server_list;
 810         requested_server_list=new_server;
 811
 812         requested_servers++;
 813
 814         if(verbose)
 815                 printf(_("Requested server address: %s\n"),inet_ntoa(new_server->server_address));
 816
 817         return OK;
 818         }
 819
 820
 821
 822
 823 /* adds a DHCP OFFER to list in memory */
 824 int add_dhcp_offer(struct in_addr source,dhcp_packet *offer_packet){
 825         dhcp_offer *new_offer;
 826         int x;
 827         unsigned option_type;
 828         unsigned option_length;
 829         struct in_addr serv_ident = {0};
 830
 831         if(offer_packet==NULL)
 832                 return ERROR;
 833
 834         /* process all DHCP options present in the packet */
 835         for(x=4;x<MAX_DHCP_OPTIONS_LENGTH;){
 836
 837                 /* end of options (0 is really just a pad, but bail out anyway) */
 838                 if((int)offer_packet->options[x]==-1 || (int)offer_packet->options[x]==0)
 839                         break;
 840
 841                 /* get option type */
 842                 option_type=offer_packet->options[x++];
 843
 844                 /* get option length */
 845                 option_length=offer_packet->options[x++];
 846
 847                 if(verbose)
 848                         printf("Option: %d (0x%02X)\n",option_type,option_length);
 849
 850                 /* get option data */
 851                 switch(option_type){
 852                 case DHCP_OPTION_LEASE_TIME:
 853                         memcpy(&dhcp_lease_time, &offer_packet->options[x],sizeof(dhcp_lease_time));
 854                         dhcp_lease_time = ntohl(dhcp_lease_time);
 855                         break;
 856                 case DHCP_OPTION_RENEWAL_TIME:
 857                         memcpy(&dhcp_renewal_time, &offer_packet->options[x],sizeof(dhcp_renewal_time));
 858                         dhcp_renewal_time = ntohl(dhcp_renewal_time);
 859                         break;
 860                 case DHCP_OPTION_REBINDING_TIME:
 861                         memcpy(&dhcp_rebinding_time, &offer_packet->options[x],sizeof(dhcp_rebinding_time));
 862                         dhcp_rebinding_time = ntohl(dhcp_rebinding_time);
 863                         break;
 864                 case DHCP_OPTION_SERVER_IDENTIFIER:
 865                         memcpy(&serv_ident.s_addr, &offer_packet->options[x],sizeof(serv_ident.s_addr));
 866                         break;
 867                         }
 868
 869                 /* skip option data we're ignoring */
 870                 if(option_type!=DHCP_OPTION_REBINDING_TIME)
 871                         x+=option_length;
 872                 }
 873
 874         if(verbose){
 875                 if(dhcp_lease_time==DHCP_INFINITE_TIME)
 876                         printf(_("Lease Time: Infinite\n"));
 877                 else
 878                         printf(_("Lease Time: %lu seconds\n"),(unsigned long)dhcp_lease_time);
 879                 if(dhcp_renewal_time==DHCP_INFINITE_TIME)
 880                         printf(_("Renewal Time: Infinite\n"));
 881                 else
 882                         printf(_("Renewal Time: %lu seconds\n"),(unsigned long)dhcp_renewal_time);
 883                 if(dhcp_rebinding_time==DHCP_INFINITE_TIME)
 884                         printf(_("Rebinding Time: Infinite\n"));
 885                 printf(_("Rebinding Time: %lu seconds\n"),(unsigned long)dhcp_rebinding_time);
 886                 }
 887
 888         new_offer=(dhcp_offer *)malloc(sizeof(dhcp_offer));
 889
 890         if(new_offer==NULL)
 891                 return ERROR;
 892
 893         /*
 894          * RFC 2131 (2.) says: "DHCP clarifies the interpretation of the
 895          * 'siaddr' field as the address of the server to use in the next step
 896          * of the client's bootstrap process.  A DHCP server may return its own
 897          * address in the 'siaddr' field, if the server is prepared to supply
 898          * the next bootstrap service (e.g., delivery of an operating system
 899          * executable image).  A DHCP server always returns its own address in
 900          * the 'server identifier' option."  'serv_ident' is the 'server
 901          * identifier' option, 'source' is the 'siaddr' field or (if 'siaddr'
 902          * wasn't available) the IP address we received the DHCPOFFER from.  If
 903          * 'serv_ident' isn't available for some reason, we use 'source'.
 904          */
 905         new_offer->server_address=serv_ident.s_addr?serv_ident:source;
 906         new_offer->offered_address=offer_packet->yiaddr;
 907         new_offer->lease_time=dhcp_lease_time;
 908         new_offer->renewal_time=dhcp_renewal_time;
 909         new_offer->rebinding_time=dhcp_rebinding_time;
 910
 911
 912         if(verbose){
 913                 printf(_("Added offer from server @ %s"),inet_ntoa(new_offer->server_address));
 914                 printf(_(" of IP address %s\n"),inet_ntoa(new_offer->offered_address));
 915                 }
 916
 917         /* add new offer to head of list */
 918         new_offer->next=dhcp_offer_list;
 919         dhcp_offer_list=new_offer;
 920
 921         return OK;
 922         }
 923
 924
 925 /* frees memory allocated to DHCP OFFER list */
 926 int free_dhcp_offer_list(void){
 927         dhcp_offer *this_offer;
 928         dhcp_offer *next_offer;
 929
 930         for(this_offer=dhcp_offer_list;this_offer!=NULL;this_offer=next_offer){
 931                 next_offer=this_offer->next;
 932                 free(this_offer);
 933                 }
 934
 935         return OK;
 936         }
 937
 938
 939 /* frees memory allocated to requested server list */
 940 int free_requested_server_list(void){
 941         requested_server *this_server;
 942         requested_server *next_server;
 943
 944         for(this_server=requested_server_list;this_server!=NULL;this_server=next_server){
 945                 next_server=this_server->next;
 946                 free(this_server);
 947                 }
 948
 949         return OK;
 950         }
 951
 952
 953 /* gets state and plugin output to return */
 954 int get_results(void){
 955         dhcp_offer *temp_offer;
 956         requested_server *temp_server;
 957         int result;
 958         u_int32_t max_lease_time=0;
 959
 960         received_requested_address=FALSE;
 961
 962         /* checks responses from requested servers */
 963         requested_responses=0;
 964         if(requested_servers>0){
 965
 966                 for(temp_server=requested_server_list;temp_server!=NULL;temp_server=temp_server->next){
 967
 968                         for(temp_offer=dhcp_offer_list;temp_offer!=NULL;temp_offer=temp_offer->next){
 969
 970                                 /* get max lease time we were offered */
 971                                 if(temp_offer->lease_time>max_lease_time || temp_offer->lease_time==DHCP_INFINITE_TIME)
 972                                         max_lease_time=temp_offer->lease_time;
 973
 974                                 /* see if we got the address we requested */
 975                                 if(!memcmp(&requested_address,&temp_offer->offered_address,sizeof(requested_address)))
 976                                         received_requested_address=TRUE;
 977
 978                                 /* see if the servers we wanted a response from talked to us or not */
 979                                 if(!memcmp(&temp_offer->server_address,&temp_server->server_address,sizeof(temp_server->server_address))){
 980                                         if(verbose){
 981                                                 printf(_("DHCP Server Match: Offerer=%s"),inet_ntoa(temp_offer->server_address));
 982                                                 printf(_(" Requested=%s"),inet_ntoa(temp_server->server_address));
 983                                                 if(temp_server->answered)
 984                                                         printf(_(" (duplicate)"));
 985                                                 printf(_("\n"));
 986                                                 }
 987                                         if(temp_server->answered == FALSE){
 988                                                 requested_responses++;
 989                                                 temp_server->answered=TRUE;
 990                                                 }
 991                                         }
 992                                 }
 993                         }
 994
 995                 }
 996
 997         /* else check and see if we got our requested address from any server */
 998         else{
 999
1000                 for(temp_offer=dhcp_offer_list;temp_offer!=NULL;temp_offer=temp_offer->next){
1001
1002                         /* get max lease time we were offered */
1003                         if(temp_offer->lease_time>max_lease_time || temp_offer->lease_time==DHCP_INFINITE_TIME)
1004                                 max_lease_time=temp_offer->lease_time;
1005
1006                         /* see if we got the address we requested */
1007                         if(!memcmp(&requested_address,&temp_offer->offered_address,sizeof(requested_address)))
1008                                 received_requested_address=TRUE;
1009                         }
1010                 }
1011
1012         result=STATE_OK;
1013         if(valid_responses==0)
1014                 result=STATE_CRITICAL;
1015         else if(requested_servers>0 && requested_responses==0)
1016                 result=STATE_CRITICAL;
1017         else if(requested_responses<requested_servers)
1018                 result=STATE_WARNING;
1019         else if(request_specific_address==TRUE && received_requested_address==FALSE)
1020                 result=STATE_WARNING;
1021
1022         if(result==0)               /* garrett honeycutt 2005 */
1023                 printf("OK: ");
1024         else if(result==1)
1025                 printf("WARNING: ");
1026         else if(result==2)
1027                 printf("CRITICAL: ");
1028         else if(result==3)
1029                 printf("UNKNOWN: ");
1030
1031         /* we didn't receive any DHCPOFFERs */
1032         if(dhcp_offer_list==NULL){
1033                 printf(_("No DHCPOFFERs were received.\n"));
1034                 return result;
1035                 }
1036
1037         printf(_("Received %d DHCPOFFER(s)"),valid_responses);
1038
1039         if(requested_servers>0)
1040                 printf(_(", %s%d of %d requested servers responded"),((requested_responses<requested_servers) && requested_responses>0)?"only ":"",requested_responses,requested_servers);
1041
1042         if(request_specific_address==TRUE)
1043                 printf(_(", requested address (%s) was %soffered"),inet_ntoa(requested_address),(received_requested_address==TRUE)?"":_("not "));
1044
1045         printf(_(", max lease time = "));
1046         if(max_lease_time==DHCP_INFINITE_TIME)
1047                 printf(_("Infinity"));
1048         else
1049                 printf("%lu sec",(unsigned long)max_lease_time);
1050
1051         printf(".\n");
1052
1053         return result;
1054         }
1055
1056
1057 /* process command-line arguments */
1058 int process_arguments(int argc, char **argv){
1059         int c;
1060
1061         if(argc<1)
1062                 return ERROR;
1063
1064         c=0;
1065         while((c+=(call_getopt(argc-c,&argv[c])))<argc){
1066
1067                 /*
1068                 if(is_option(argv[c]))
1069                         continue;
1070                 */
1071                 }
1072
1073         return validate_arguments();
1074         }
1075
1076
1077
1078 int call_getopt(int argc, char **argv){
1079         int c=0;
1080         int i=0;
1081         struct in_addr ipaddress;
1082
1083         int option_index = 0;
1084         static struct option long_options[] =
1085         {
1086                 {"serverip",       required_argument,0,'s'},
1087                 {"requestedip",    required_argument,0,'r'},
1088                 {"timeout",        required_argument,0,'t'},
1089                 {"interface",      required_argument,0,'i'},
1090                 {"unicast",        no_argument,      0,'u'},
1091                 {"verbose",        no_argument,      0,'v'},
1092                 {"version",        no_argument,      0,'V'},
1093                 {"help",           no_argument,      0,'h'},
1094                 {0,0,0,0}
1095         };
1096
1097         while(1){
1098                 c=getopt_long(argc,argv,"+hVvt:s:r:t:i:u",long_options,&option_index);
1099
1100                 i++;
1101
1102                 if(c==-1||c==EOF||c==1)
1103                         break;
1104
1105                 switch(c){
1106                 case 'w':
1107                 case 'r':
1108                 case 't':
1109                 case 'i':
1110                         i++;
1111                         break;
1112                 default:
1113                         break;
1114                         }
1115
1116                 switch(c){
1117
1118                 case 's': /* DHCP server address */
1119                         if(inet_aton(optarg,&ipaddress)){
1120                                 add_requested_server(ipaddress);
1121                                 inet_aton(optarg, &dhcp_ip);
1122                                 if (verbose)
1123                                         printf("querying %s\n",inet_ntoa(dhcp_ip));
1124                         }
1125                         /*
1126                         else
1127                                 usage("Invalid server IP address\n");
1128                         */
1129                         break;
1130
1131                 case 'r': /* address we are requested from DHCP servers */
1132                         if(inet_aton(optarg,&ipaddress)){
1133                                 requested_address=ipaddress;
1134                                 request_specific_address=TRUE;
1135                                 }
1136                         /*
1137                         else
1138                                 usage("Invalid requested IP address\n");
1139                         */
1140                         break;
1141
1142                 case 't': /* timeout */
1143
1144                         /*
1145                         if(is_intnonneg(optarg))
1146                         */
1147                         if(atoi(optarg)>0)
1148                                 dhcpoffer_timeout=atoi(optarg);
1149                         /*
1150                         else
1151                                 usage("Time interval must be a nonnegative integer\n");
1152                         */
1153                         break;
1154
1155                 case 'i': /* interface name */
1156
1157                         strncpy(network_interface_name,optarg,sizeof(network_interface_name)-1);
1158                         network_interface_name[sizeof(network_interface_name)-1]='\x0';
1159
1160                         break;
1161
1162                 case 'u': /* unicast testing */
1163                         unicast=1;
1164                         break;
1165
1166                 case 'V': /* version */
1167                         print_revision(progname,revision);
1168                         exit(STATE_OK);
1169
1170                 case 'h': /* help */
1171                         print_help();
1172                         exit(STATE_OK);
1173
1174                 case 'v': /* verbose */
1175                         verbose=1;
1176                         break;
1177
1178                 case '?': /* help */
1179                         usage5 ();
1180                         break;
1181
1182                 default:
1183                         break;
1184                         }
1185                 }
1186
1187         return i;
1188         }
1189
1190
1191 int validate_arguments(void){
1192
1193         return OK;
1194         }
1195
1196
1197 #if defined(__sun__) || defined(__solaris__) || defined(__hpux__)
1198 /* Kompf 2000-2003      see ACKNOWLEDGEMENTS */
1199
1200 /* get a message from a stream; return type of message */
1201 static int get_msg(int fd){
1202         int flags = 0;
1203         int res, ret;
1204         ctl_area[0] = 0;
1205         dat_area[0] = 0;
1206         ret = 0;
1207         res = getmsg(fd, &ctl, &dat, &flags);
1208
1209         if(res < 0){
1210                 if(errno == EINTR){
1211                         return(GOT_INTR);
1212                         }
1213                 else{
1214                         printf("%s\n", "get_msg FAILED.");
1215                         return(GOT_ERR);
1216                         }
1217                 }
1218         if(ctl.len > 0){
1219                 ret |= GOT_CTRL;
1220                 }
1221         if(dat.len > 0){
1222                 ret |= GOT_DATA;
1223                 }
1224
1225         return(ret);
1226         }
1227
1228 /* verify that dl_primitive in ctl_area = prim */
1229 static int check_ctrl(int prim){
1230         dl_error_ack_t *err_ack = (dl_error_ack_t *)ctl_area;
1231
1232         if(err_ack->dl_primitive != prim){
1233                 printf(_("Error: DLPI stream API failed to get MAC in check_ctrl: %s.\n"), strerror(errno));
1234                 exit(STATE_UNKNOWN);
1235                 }
1236
1237         return 0;
1238         }
1239
1240 /* put a control message on a stream */
1241 static int put_ctrl(int fd, int len, int pri){
1242
1243         ctl.len = len;
1244         if(putmsg(fd, &ctl, 0, pri) < 0){
1245                 printf(_("Error: DLPI stream API failed to get MAC in put_ctrl/putmsg(): %s.\n"), strerror(errno));
1246                 exit(STATE_UNKNOWN);
1247                 }
1248
1249         return  0;
1250         }
1251
1252 /* put a control + data message on a stream */
1253 static int put_both(int fd, int clen, int dlen, int pri){
1254
1255         ctl.len = clen;
1256         dat.len = dlen;
1257         if(putmsg(fd, &ctl, &dat, pri) < 0){
1258                 printf(_("Error: DLPI stream API failed to get MAC in put_both/putmsg().\n"), strerror(errno));
1259                 exit(STATE_UNKNOWN);
1260                 }
1261
1262         return  0;
1263         }
1264
1265 /* open file descriptor and attach */
1266 static int dl_open(const char *dev, int unit, int *fd){
1267         dl_attach_req_t *attach_req = (dl_attach_req_t *)ctl_area;
1268
1269         if((*fd = open(dev, O_RDWR)) == -1){
1270                 printf(_("Error: DLPI stream API failed to get MAC in dl_attach_req/open(%s..): %s.\n"), dev, strerror(errno));
1271                 exit(STATE_UNKNOWN);
1272                 }
1273         attach_req->dl_primitive = DL_ATTACH_REQ;
1274         attach_req->dl_ppa = unit;
1275         put_ctrl(*fd, sizeof(dl_attach_req_t), 0);
1276         get_msg(*fd);
1277         return check_ctrl(DL_OK_ACK);
1278         }
1279
1280 /* send DL_BIND_REQ */
1281 static int dl_bind(int fd, int sap, u_char *addr){
1282         dl_bind_req_t *bind_req = (dl_bind_req_t *)ctl_area;
1283         dl_bind_ack_t *bind_ack = (dl_bind_ack_t *)ctl_area;
1284
1285         bind_req->dl_primitive = DL_BIND_REQ;
1286         bind_req->dl_sap = sap;
1287         bind_req->dl_max_conind = 1;
1288         bind_req->dl_service_mode = DL_CLDLS;
1289         bind_req->dl_conn_mgmt = 0;
1290         bind_req->dl_xidtest_flg = 0;
1291         put_ctrl(fd, sizeof(dl_bind_req_t), 0);
1292         get_msg(fd);
1293         if (GOT_ERR == check_ctrl(DL_BIND_ACK)){
1294                 printf(_("Error: DLPI stream API failed to get MAC in dl_bind/check_ctrl(): %s.\n"), strerror(errno));
1295                 exit(STATE_UNKNOWN);
1296                 }
1297         bcopy((u_char *)bind_ack + bind_ack->dl_addr_offset, addr,
1298               bind_ack->dl_addr_length);
1299
1300         return 0;
1301         }
1302
1303 /***********************************************************************
1304  * interface:
1305  * function mac_addr_dlpi - get the mac address of the interface with
1306  *                          type dev (eg lnc, hme) and unit (0, 1 ..)
1307  *
1308  * parameter: addr: an array of six bytes, has to be allocated by the caller
1309  *
1310  * return: 0 if OK, -1 if the address could not be determined
1311  *
1312  *
1313  ***********************************************************************/
1314
1315 long mac_addr_dlpi( const char *dev, int unit, u_char  *addr){
1316         int fd;
1317         u_char mac_addr[25];
1318
1319         if(GOT_ERR != dl_open(dev, unit, &fd)){
1320                 if(GOT_ERR != dl_bind(fd, INSAP, mac_addr)){
1321                         bcopy( mac_addr, addr, 6);
1322                         return 0;
1323                         }
1324                 }
1325         close(fd);
1326
1327         return -1;
1328         }
1329
1330 /* Kompf 2000-2003 */
1331 #endif
1332
1333
1334 /* print usage help */
1335 void print_help(void){
1336
1337         print_revision(progname,revision);
1338
1339         printf("Copyright (c) 2001-2004 Ethan Galstad (nagios@nagios.org)\n");
1340         printf (COPYRIGHT, copyright, email);
1341
1342         printf("%s\n", _("This plugin tests the availability of DHCP servers on a network."));
1343
1344   printf ("\n\n");
1345
1346         print_usage();
1347
1348         printf (_(UT_HELP_VRSN));
1349
1350         printf (_(UT_VERBOSE));
1351
1352         printf (" %s\n", "-s, --serverip=IPADDRESS");
1353   printf ("    %s\n", _("IP address of DHCP server that we must hear from"));
1354   printf (" %s\n", "-r, --requestedip=IPADDRESS");
1355   printf ("    %s\n", _("IP address that should be offered by at least one DHCP server"));
1356   printf (" %s\n", "-t, --timeout=INTEGER");
1357   printf ("    %s\n", _("Seconds to wait for DHCPOFFER before timeout occurs"));
1358   printf (" %s\n", "-i, --interface=STRING");
1359   printf ("    %s\n", _("Interface to to use for listening (i.e. eth0)"));
1360   printf (" %s\n", "-u, --unicast");
1361   printf ("    %s\n", _("Unicast testing: mimic a DHCP relay, requires -s"));
1362
1363         return;
1364         }
1365
1366
1367 void
1368 print_usage(void){
1369
1370   printf (_("Usage:"));
1371   printf (" %s [-v] [-u] [-s serverip] [-r requestedip] [-t timeout]\n",progname);
1372   printf ("                  [-i interface]\n");
1373
1374         return;
1375         }
1376
1377
1378