dlls/icmp/icmp_main.c

   1 /*
   2  * ICMP
   3  *
   4  * Francois Gouget, 1999, based on the work of
   5  *   RW Hall, 1999, based on public domain code PING.C by Mike Muus (1983)
   6  *   and later works (c) 1989 Regents of Univ. of California - see copyright
   7  *   notice at end of source-code.
   8  */
   9
  10 /* Future work:
  11  * - Systems like FreeBSD don't seem to support the IP_TTL option and maybe others.
  12  *   But using IP_HDRINCL and building the IP header by hand might work.
  13  * - Not all IP options are supported.
  14  * - Are ICMP handles real handles, i.e. inheritable and all? There might be some
  15  *   more work to do here, including server side stuff with synchronization.
  16  * - Is it correct to use malloc for the internal buffer, for allocating the
  17  *   handle's structure?
  18  * - This API should probably be thread safe. Is it really?
  19  * - Using the winsock functions has not been tested.
  20  */
  21
  22 #include "config.h"
  23
  24 #include <sys/types.h>
  25 #ifdef HAVE_SYS_SOCKET_H
  26 # include <sys/socket.h>
  27 #endif
  28 #include <netdb.h>
  29 #include <netinet/in_systm.h>
  30 #ifdef HAVE_NETINET_IN_H
  31 # include <netinet/in.h>
  32 #endif
  33
  34 #include <sys/time.h>
  35 #include <string.h>
  36 #include <errno.h>
  37 #include <unistd.h>
  38 #ifdef HAVE_ARPA_INET_H
  39 # include <arpa/inet.h>
  40 #endif
  41
  42 #include "windef.h"
  43 #include "winbase.h"
  44 #ifdef ICMP_WIN
  45 #include "winsock.h"
  46 #endif
  47
  48 #include "winerror.h"
  49 #include "wine/ipexport.h"
  50 #include "wine/icmpapi.h"
  51 #include "debugtools.h"
  52
  53 /* Set up endiannes macros for the ip and ip_icmp BSD headers */
  54 #ifndef BIG_ENDIAN
  55 #define BIG_ENDIAN       4321
  56 #endif
  57 #ifndef LITTLE_ENDIAN
  58 #define LITTLE_ENDIAN    1234
  59 #endif
  60 #ifndef BYTE_ORDER
  61 #ifdef WORDS_BIGENDIAN
  62 #define BYTE_ORDER       BIG_ENDIAN
  63 #else
  64 #define BYTE_ORDER       LITTLE_ENDIAN
  65 #endif
  66 #endif /* BYTE_ORDER */
  67
  68 #define u_int16_t  WORD
  69 #define u_int32_t  DWORD
  70
  71 /* These are BSD headers. We use these here because they are needed on
  72  * libc5 Linux systems. On other platforms they are usually simply more
  73  * complete than the native stuff, and cause less portability problems
  74  * so we use them anyway.
  75  */
  76 #include "ip.h"
  77 #include "ip_icmp.h"
  78
  79
  80 DEFAULT_DEBUG_CHANNEL(icmp)
  81
  82 /* Define the following macro to use the winsock functions */
  83 /*#define ICMP_WIN*/
  84
  85 #ifdef ICMP_WIN
  86 /* FIXME: should we include winsock.h ???*/
  87 SOCKET WINAPI WINSOCK_socket(INT af, INT type, INT protocol);
  88 INT WINAPI WINSOCK_sendto(SOCKET s, char *buf, INT len, INT flags, struct sockaddr *to, INT tolen);
  89 INT WINAPI WINSOCK_recvfrom(SOCKET s, char *buf,INT len, INT flags, struct sockaddr *from, INT *fromlen32);
  90 INT WINAPI WINSOCK_shutdown(SOCKET s, INT how);
  91 #endif
  92
  93
  94 #ifdef ICMP_WIN
  95 #define ISOCK_SOCKET                SOCKET
  96 #define ISOCK_ISVALID(a)            ((a)!=INVALID_SOCKET)
  97 #define ISOCK_getsockopt(a,b,c,d,e) WINSOCK_getsockopt(a,b,c,d,e)
  98 #define ISOCK_recvfrom(a,b,c,d,e,f) WINSOCK_recvfrom(a,b,c,d,e,f)
  99 #define ISOCK_select(a,b,c,d,e)     WINSOCK_select(a,b,c,d,e)
 100 #define ISOCK_sendto(a,b,c,d,e,f)   WINSOCK_sendto(a,b,c,d,e,f)
 101 #define ISOCK_setsockopt(a,b,c,d,e) WINSOCK_setsockopt(a,b,c,d,e)
 102 #define ISOCK_shutdown(a,b)         WINSOCK_shutdown(a,b)
 103 #define ISOCK_socket(a,b,c)         WINSOCK_socket(a,b,c)
 104 #else
 105 #define ISOCK_SOCKET                int
 106 #define ISOCK_ISVALID(a)            ((a)>=0)
 107 #define ISOCK_getsockopt(a,b,c,d,e) getsockopt(a,b,c,d,e)
 108 #define ISOCK_recvfrom(a,b,c,d,e,f) recvfrom(a,b,c,d,e,f)
 109 #define ISOCK_select(a,b,c,d,e)     select(a,b,c,d,e)
 110 #define ISOCK_setsockopt(a,b,c,d,e) setsockopt(a,b,c,d,e)
 111 #define ISOCK_sendto(a,b,c,d,e,f)   sendto(a,b,c,d,e,f)
 112 #define ISOCK_shutdown(a,b)         shutdown(a,b)
 113 #define ISOCK_socket(a,b,c)         socket(a,b,c)
 114 #endif
 115
 116 typedef struct {
 117     ISOCK_SOCKET sid;
 118     IP_OPTION_INFORMATION default_opts;
 119 } icmp_t;
 120
 121 #define IP_OPTS_UNKNOWN     0
 122 #define IP_OPTS_DEFAULT     1
 123 #define IP_OPTS_CUSTOM      2
 124
 125 /* The sequence number is unique process wide, so that all threads
 126  * have a distinct sequence number.
 127  */
 128 static LONG icmp_sequence=0;
 129
 130 static int in_cksum(u_short *addr, int len)
 131 {
 132     int nleft=len;
 133     u_short *w = addr;
 134     int sum = 0;
 135     u_short answer = 0;
 136
 137     while (nleft > 1) {
 138         sum += *w++;
 139         nleft -= 2;
 140     }
 141
 142     if (nleft == 1) {
 143         *(u_char *)(&answer) = *(u_char *)w;
 144         sum += answer;
 145     }
 146
 147     sum = (sum >> 16) + (sum & 0xffff);
 148     sum  += (sum >> 16);
 149     answer = ~sum;
 150     return(answer);
 151 }
 152
 153
 154
 155 /*
 156  * Exported Routines.
 157  */
 158
 159 /***********************************************************************
 160  *              IcmpCreateFile
 161  */
 162 HANDLE WINAPI IcmpCreateFile(VOID)
 163 {
 164     icmp_t* icp;
 165
 166     ISOCK_SOCKET sid=ISOCK_socket(AF_INET,SOCK_RAW,IPPROTO_ICMP);
 167     if (!ISOCK_ISVALID(sid)) {
 168         MESSAGE("WARNING: Trying to use ICMP will fail unless running as root\n");
 169         SetLastError(ERROR_ACCESS_DENIED);
 170         return INVALID_HANDLE_VALUE;
 171     }
 172
 173     icp=HeapAlloc(GetProcessHeap(), 0, sizeof(*icp));
 174     if (icp==NULL) {
 175         SetLastError(IP_NO_RESOURCES);
 176         return INVALID_HANDLE_VALUE;
 177     }
 178     icp->sid=sid;
 179     icp->default_opts.OptionsSize=IP_OPTS_UNKNOWN;
 180     return (HANDLE)icp;
 181 }
 182
 183
 184 /***********************************************************************
 185  *              IcmpCloseHandle
 186  */
 187 BOOL WINAPI IcmpCloseHandle(HANDLE  IcmpHandle)
 188 {
 189     icmp_t* icp=(icmp_t*)IcmpHandle;
 190     if (IcmpHandle==INVALID_HANDLE_VALUE) {
 191         /* FIXME: in fact win98 seems to ignore the handle value !!! */
 192         SetLastError(ERROR_INVALID_HANDLE);
 193         return FALSE;
 194     }
 195
 196     ISOCK_shutdown(icp->sid,2);
 197     HeapFree(GetProcessHeap (), 0, icp);
 198     return TRUE;
 199 }
 200
 201
 202 /***********************************************************************
 203  *              IcmpSendEcho
 204  */
 205 DWORD WINAPI IcmpSendEcho(
 206     HANDLE                   IcmpHandle,
 207     IPAddr                   DestinationAddress,
 208     LPVOID                   RequestData,
 209     WORD                     RequestSize,
 210     PIP_OPTION_INFORMATION   RequestOptions,
 211     LPVOID                   ReplyBuffer,
 212     DWORD                    ReplySize,
 213     DWORD                    Timeout
 214     )
 215 {
 216     icmp_t* icp=(icmp_t*)IcmpHandle;
 217     unsigned char* reqbuf;
 218     int reqsize;
 219
 220     struct icmp_echo_reply* ier;
 221     struct ip* ip_header;
 222     struct icmp* icmp_header;
 223     char* endbuf;
 224     int ip_header_len;
 225     int maxlen;
 226     fd_set fdr;
 227     struct timeval timeout,send_time,recv_time;
 228     struct sockaddr_in addr;
 229     int addrlen;
 230     unsigned short id,seq,cksum;
 231     int res;
 232
 233     if (IcmpHandle==INVALID_HANDLE_VALUE) {
 234         /* FIXME: in fact win98 seems to ignore the handle value !!! */
 235         SetLastError(ERROR_INVALID_HANDLE);
 236         return 0;
 237     }
 238
 239     if (ReplySize<sizeof(ICMP_ECHO_REPLY)+ICMP_MINLEN) {
 240         SetLastError(IP_BUF_TOO_SMALL);
 241         return 0;
 242     }
 243     /* check the request size against SO_MAX_MSG_SIZE using getsockopt */
 244
 245     /* Prepare the request */
 246     id=getpid() & 0xFFFF;
 247     seq=InterlockedIncrement(&icmp_sequence) & 0xFFFF;
 248
 249     reqsize=ICMP_MINLEN+RequestSize;
 250     reqbuf=HeapAlloc(GetProcessHeap(), 0, reqsize);
 251     if (reqbuf==NULL) {
 252         SetLastError(ERROR_OUTOFMEMORY);
 253         return 0;
 254     }
 255
 256     icmp_header=(struct icmp*)reqbuf;
 257     icmp_header->icmp_type=ICMP_ECHO;
 258     icmp_header->icmp_code=0;
 259     icmp_header->icmp_cksum=0;
 260     icmp_header->icmp_id=id;
 261     icmp_header->icmp_seq=seq;
 262     memcpy(reqbuf+ICMP_MINLEN, RequestData, RequestSize);
 263     icmp_header->icmp_cksum=cksum=in_cksum((u_short*)reqbuf,reqsize);
 264
 265     addr.sin_family=AF_INET;
 266     addr.sin_addr.s_addr=DestinationAddress;
 267     addr.sin_port=0;
 268
 269     if (RequestOptions!=NULL) {
 270         int val;
 271         if (icp->default_opts.OptionsSize==IP_OPTS_UNKNOWN) {
 272             int len;
 273             /* Before we mess with the options, get the default values */
 274             len=sizeof(val);
 275             ISOCK_getsockopt(icp->sid,IPPROTO_IP,IP_TTL,(char *)&val,&len);
 276             icp->default_opts.Ttl=val;
 277
 278             len=sizeof(val);
 279             ISOCK_getsockopt(icp->sid,IPPROTO_IP,IP_TOS,(char *)&val,&len);
 280             icp->default_opts.Tos=val;
 281             /* FIXME: missing: handling of IP 'flags', and all the other options */
 282         }
 283
 284         val=RequestOptions->Ttl;
 285         ISOCK_setsockopt(icp->sid,IPPROTO_IP,IP_TTL,(char *)&val,sizeof(val));
 286         val=RequestOptions->Tos;
 287         ISOCK_setsockopt(icp->sid,IPPROTO_IP,IP_TOS,(char *)&val,sizeof(val));
 288         /* FIXME:  missing: handling of IP 'flags', and all the other options */
 289
 290         icp->default_opts.OptionsSize=IP_OPTS_CUSTOM;
 291     } else if (icp->default_opts.OptionsSize==IP_OPTS_CUSTOM) {
 292         int val;
 293
 294         /* Restore the default options */
 295         val=icp->default_opts.Ttl;
 296         ISOCK_setsockopt(icp->sid,IPPROTO_IP,IP_TTL,(char *)&val,sizeof(val));
 297         val=icp->default_opts.Tos;
 298         ISOCK_setsockopt(icp->sid,IPPROTO_IP,IP_TOS,(char *)&val,sizeof(val));
 299         /* FIXME: missing: handling of IP 'flags', and all the other options */
 300
 301         icp->default_opts.OptionsSize=IP_OPTS_DEFAULT;
 302     }
 303
 304     /* Get ready for receiving the reply
 305      * Do it before we send the request to minimize the risk of introducing delays
 306      */
 307     FD_ZERO(&fdr);
 308     FD_SET(icp->sid,&fdr);
 309     timeout.tv_sec=Timeout/1000;
 310     timeout.tv_usec=(Timeout % 1000)*1000;
 311     addrlen=sizeof(addr);
 312     ier=ReplyBuffer;
 313     ip_header=(struct ip *) ((char *) ReplyBuffer+sizeof(ICMP_ECHO_REPLY));
 314     endbuf=(char *) ReplyBuffer+ReplySize;
 315     maxlen=ReplySize-sizeof(ICMP_ECHO_REPLY);
 316
 317     /* Send the packet */
 318     TRACE("Sending %d bytes (RequestSize=%d) to %s\n", reqsize, RequestSize, inet_ntoa(addr.sin_addr));
 319 #if 0
 320     if (TRACE_ON(icmp)){
 321         unsigned char* buf=(unsigned char*)reqbuf;
 322         int i;
 323         printf("Output buffer:\n");
 324         for (i=0;i<reqsize;i++)
 325             printf("%2x,", buf[i]);
 326         printf("\n");
 327     }
 328 #endif
 329
 330     gettimeofday(&send_time,NULL);
 331     res=ISOCK_sendto(icp->sid, reqbuf, reqsize, 0, (struct sockaddr*)&addr, sizeof(addr));
 332     HeapFree(GetProcessHeap (), 0, reqbuf);
 333     if (res<0) {
 334         if (errno==EMSGSIZE)
 335             SetLastError(IP_PACKET_TOO_BIG);
 336         else {
 337             switch (errno) {
 338             case ENETUNREACH:
 339                 SetLastError(IP_DEST_NET_UNREACHABLE);
 340                 break;
 341             case EHOSTUNREACH:
 342                 SetLastError(IP_DEST_NET_UNREACHABLE);
 343                 break;
 344             default:
 345                 TRACE("unknown error: errno=%d\n",errno);
 346                 SetLastError(ERROR_UNKNOWN);
 347             }
 348         }
 349         return 0;
 350     }
 351
 352     /* Get the reply */
 353     ip_header_len=0; /* because gcc was complaining */
 354     while ((res=ISOCK_select(icp->sid+1,&fdr,NULL,NULL,&timeout))>0) {
 355         gettimeofday(&recv_time,NULL);
 356         res=ISOCK_recvfrom(icp->sid, (char*)ip_header, maxlen, 0, (struct sockaddr*)&addr,&addrlen);
 357         TRACE("received %d bytes from %s\n",res, inet_ntoa(addr.sin_addr));
 358         ier->Status=IP_REQ_TIMED_OUT;
 359
 360         /* Check whether we should ignore this packet */
 361         if ((ip_header->ip_p==IPPROTO_ICMP) && (res>=sizeof(struct ip)+ICMP_MINLEN)) {
 362             ip_header_len=ip_header->ip_hl << 2;
 363             icmp_header=(struct icmp*)(((char*)ip_header)+ip_header_len);
 364             TRACE("received an ICMP packet of type,code=%d,%d\n",icmp_header->icmp_type,icmp_header->icmp_code);
 365             if (icmp_header->icmp_type==ICMP_ECHOREPLY) {
 366                 if ((icmp_header->icmp_id==id) && (icmp_header->icmp_seq==seq))
 367                     ier->Status=IP_SUCCESS;
 368             } else {
 369                 switch (icmp_header->icmp_type) {
 370                 case ICMP_UNREACH:
 371                     switch (icmp_header->icmp_code) {
 372                     case ICMP_UNREACH_HOST:
 373 #ifdef ICMP_UNREACH_HOST_UNKNOWN
 374                     case ICMP_UNREACH_HOST_UNKNOWN:
 375 #endif
 376 #ifdef ICMP_UNREACH_ISOLATED
 377                     case ICMP_UNREACH_ISOLATED:
 378 #endif
 379 #ifdef ICMP_UNREACH_HOST_PROHIB
 380                     case ICMP_UNREACH_HOST_PROHIB:
 381 #endif
 382 #ifdef ICMP_UNREACH_TOSHOST
 383                     case ICMP_UNREACH_TOSHOST:
 384 #endif
 385                         ier->Status=IP_DEST_HOST_UNREACHABLE;
 386                         break;
 387                     case ICMP_UNREACH_PORT:
 388                         ier->Status=IP_DEST_PORT_UNREACHABLE;
 389                         break;
 390                     case ICMP_UNREACH_PROTOCOL:
 391                         ier->Status=IP_DEST_PROT_UNREACHABLE;
 392                         break;
 393                     case ICMP_UNREACH_SRCFAIL:
 394                         ier->Status=IP_BAD_ROUTE;
 395                         break;
 396                     default:
 397                         ier->Status=IP_DEST_NET_UNREACHABLE;
 398                     }
 399                     break;
 400                 case ICMP_TIMXCEED:
 401                     if (icmp_header->icmp_code==ICMP_TIMXCEED_REASS)
 402                         ier->Status=IP_TTL_EXPIRED_REASSEM;
 403                     else
 404                         ier->Status=IP_TTL_EXPIRED_TRANSIT;
 405                     break;
 406                 case ICMP_PARAMPROB:
 407                     ier->Status=IP_PARAM_PROBLEM;
 408                     break;
 409                 case ICMP_SOURCEQUENCH:
 410                     ier->Status=IP_SOURCE_QUENCH;
 411                     break;
 412                 }
 413                 if (ier->Status!=IP_REQ_TIMED_OUT) {
 414                     struct ip* rep_ip_header;
 415                     struct icmp* rep_icmp_header;
 416                     /* The ICMP header size of all the packets we accept is the same */
 417                     rep_ip_header=(struct ip*)(((char*)icmp_header)+ICMP_MINLEN);
 418                     rep_icmp_header=(struct icmp*)(((char*)rep_ip_header)+(rep_ip_header->ip_hl << 2));
 419
 420                     /* Make sure that this is really a reply to our packet */
 421                     if (ip_header_len+ICMP_MINLEN+(rep_ip_header->ip_hl << 2)+ICMP_MINLEN>ip_header->ip_len) {
 422                         ier->Status=IP_REQ_TIMED_OUT;
 423                     } else if ((rep_icmp_header->icmp_type!=ICMP_ECHO) ||
 424                         (rep_icmp_header->icmp_code!=0) ||
 425                         (rep_icmp_header->icmp_id!=id) ||
 426                         (rep_icmp_header->icmp_seq!=seq) ||
 427                         (rep_icmp_header->icmp_cksum!=cksum)) {
 428                         /* This was not a reply to one of our packets after all */
 429                         TRACE("skipping type,code=%d,%d id,seq=%d,%d cksum=%d\n",
 430                             rep_icmp_header->icmp_type,rep_icmp_header->icmp_code,
 431                             rep_icmp_header->icmp_id,rep_icmp_header->icmp_seq,
 432                             rep_icmp_header->icmp_cksum);
 433                         TRACE("expected type,code=8,0 id,seq=%d,%d cksum=%d\n",
 434                             id,seq,
 435                             cksum);
 436                         ier->Status=IP_REQ_TIMED_OUT;
 437                     }
 438                 }
 439             }
 440         }
 441
 442         if (ier->Status==IP_REQ_TIMED_OUT) {
 443             /* This packet was not for us.
 444              * Decrease the timeout so that we don't enter an endless loop even
 445              * if we get flooded with ICMP packets that are not for us.
 446              */
 447             timeout.tv_sec=Timeout/1000-(recv_time.tv_sec-send_time.tv_sec);
 448             timeout.tv_usec=(Timeout % 1000)*1000+send_time.tv_usec-(recv_time.tv_usec-send_time.tv_usec);
 449             if (timeout.tv_usec<0) {
 450                 timeout.tv_usec+=1000000;
 451                 timeout.tv_sec--;
 452             }
 453             continue;
 454         } else {
 455             /* This is a reply to our packet */
 456             memcpy(&ier->Address,&ip_header->ip_src,sizeof(IPAddr));
 457             /* Status is already set */
 458             ier->RoundTripTime=(recv_time.tv_sec-send_time.tv_sec)*1000+(recv_time.tv_usec-send_time.tv_usec)/1000;
 459             ier->DataSize=res-ip_header_len-ICMP_MINLEN;
 460             ier->Reserved=0;
 461             ier->Data=endbuf-ier->DataSize;
 462             memmove(ier->Data,((char*)ip_header)+ip_header_len+ICMP_MINLEN,ier->DataSize);
 463             ier->Options.Ttl=ip_header->ip_ttl;
 464             ier->Options.Tos=ip_header->ip_tos;
 465             ier->Options.Flags=ip_header->ip_off >> 13;
 466             ier->Options.OptionsSize=ip_header_len-sizeof(struct ip);
 467             if (ier->Options.OptionsSize!=0) {
 468                 ier->Options.OptionsData=(unsigned char *) ier->Data-ier->Options.OptionsSize;
 469                 /* FIXME: We are supposed to rearrange the option's 'source route' data */
 470                 memmove(ier->Options.OptionsData,((char*)ip_header)+ip_header_len,ier->Options.OptionsSize);
 471                 endbuf=ier->Options.OptionsData;
 472             } else {
 473                 ier->Options.OptionsData=NULL;
 474                 endbuf=ier->Data;
 475             }
 476
 477             /* Prepare for the next packet */
 478             ier++;
 479             ip_header=(struct ip*)(((char*)ip_header)+sizeof(ICMP_ECHO_REPLY));
 480             maxlen=endbuf-(char*)ip_header;
 481
 482             /* Check out whether there is more but don't wait this time */
 483             timeout.tv_sec=0;
 484             timeout.tv_usec=0;
 485         }
 486         FD_ZERO(&fdr);
 487         FD_SET(icp->sid,&fdr);
 488     }
 489     res=ier-(ICMP_ECHO_REPLY*)ReplyBuffer;
 490     if (res==0)
 491         SetLastError(IP_REQ_TIMED_OUT);
 492     TRACE("received %d replies\n",res);
 493     return res;
 494 }
 495
 496 /*
 497  * Copyright (c) 1989 The Regents of the University of California.
 498  * All rights reserved.
 499  *
 500  * This code is derived from software contributed to Berkeley by
 501  * Mike Muuss.
 502  *
 503  * Redistribution and use in source and binary forms, with or without
 504  * modification, are permitted provided that the following conditions
 505  * are met:
 506  * 1. Redistributions of source code must retain the above copyright
 507  *    notice, this list of conditions and the following disclaimer.
 508  * 2. Redistributions in binary form must reproduce the above copyright
 509  *    notice, this list of conditions and the following disclaimer in the
 510  *    documentation and/or other materials provided with the distribution.
 511  * 3. All advertising materials mentioning features or use of this software
 512  *    must display the following acknowledgement:
 513  *      This product includes software developed by the University of
 514  *      California, Berkeley and its contributors.
 515  * 4. Neither the name of the University nor the names of its contributors
 516  *    may be used to endorse or promote products derived from this software
 517  *    without specific prior written permission.
 518  *
 519  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 520  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 521  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 522  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 523  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 524  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 525  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 526  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 527  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 528  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 529  * SUCH DAMAGE.
 530  *
 531  */