rpcrt4: Replace some usage of the long type.
[wine] / dlls / iphlpapi / icmp.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  * This library is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
22  */
23
24 /* Future work:
25  * - Systems like FreeBSD don't seem to support the IP_TTL option and maybe others.
26  *   But using IP_HDRINCL and building the IP header by hand might work.
27  * - Not all IP options are supported.
28  * - Are ICMP handles real handles, i.e. inheritable and all? There might be some
29  *   more work to do here, including server side stuff with synchronization.
30  * - This API should probably be thread safe. Is it really?
31  * - Using the winsock functions has not been tested.
32  */
33
34 #include "config.h"
35
36 #include <sys/types.h>
37 #ifdef HAVE_SYS_SOCKET_H
38 # include <sys/socket.h>
39 #endif
40 #ifdef HAVE_NETDB_H
41 # include <netdb.h>
42 #endif
43 #ifdef HAVE_NETINET_IN_SYSTM_H
44 # include <netinet/in_systm.h>
45 #endif
46 #ifdef HAVE_NETINET_IN_H
47 # include <netinet/in.h>
48 #endif
49
50 #ifdef HAVE_SYS_TIME_H
51 # include <sys/time.h>
52 #endif
53 #include <stdarg.h>
54 #include <string.h>
55 #include <errno.h>
56 #ifdef HAVE_UNISTD_H
57 # include <unistd.h>
58 #endif
59 #ifdef HAVE_ARPA_INET_H
60 # include <arpa/inet.h>
61 #endif
62 #ifdef HAVE_SYS_POLL_H
63 # include <sys/poll.h>
64 #endif
65
66 #include "windef.h"
67 #include "winbase.h"
68 #include "winerror.h"
69 #include "winternl.h"
70 #include "ipexport.h"
71 #include "icmpapi.h"
72 #include "wine/debug.h"
73
74 /* Set up endianness macros for the ip and ip_icmp BSD headers */
75 #ifndef BIG_ENDIAN
76 #define BIG_ENDIAN       4321
77 #endif
78 #ifndef LITTLE_ENDIAN
79 #define LITTLE_ENDIAN    1234
80 #endif
81 #ifndef BYTE_ORDER
82 #ifdef WORDS_BIGENDIAN
83 #define BYTE_ORDER       BIG_ENDIAN
84 #else
85 #define BYTE_ORDER       LITTLE_ENDIAN
86 #endif
87 #endif /* BYTE_ORDER */
88
89 #define u_int16_t  WORD
90 #define u_int32_t  DWORD
91
92 /* These are BSD headers. We use these here because they are needed on
93  * libc5 Linux systems. On other platforms they are usually simply more
94  * complete than the native stuff, and cause less portability problems
95  * so we use them anyway.
96  */
97 #include "ip.h"
98 #include "ip_icmp.h"
99
100
101 WINE_DEFAULT_DEBUG_CHANNEL(icmp);
102
103
104 typedef struct {
105     int sid;
106     IP_OPTION_INFORMATION default_opts;
107 } icmp_t;
108
109 #define IP_OPTS_UNKNOWN     0
110 #define IP_OPTS_DEFAULT     1
111 #define IP_OPTS_CUSTOM      2
112
113 /* The sequence number is unique process wide, so that all threads
114  * have a distinct sequence number.
115  */
116 static LONG icmp_sequence=0;
117
118 static int in_cksum(u_short *addr, int len)
119 {
120     int nleft=len;
121     u_short *w = addr;
122     int sum = 0;
123     u_short answer = 0;
124
125     while (nleft > 1) {
126         sum += *w++;
127         nleft -= 2;
128     }
129
130     if (nleft == 1) {
131         *(u_char *)(&answer) = *(u_char *)w;
132         sum += answer;
133     }
134
135     sum = (sum >> 16) + (sum & 0xffff);
136     sum  += (sum >> 16);
137     answer = ~sum;
138     return(answer);
139 }
140
141
142
143 /*
144  * Exported Routines.
145  */
146
147 /***********************************************************************
148  *              IcmpCreateFile (IPHLPAPI.@)
149  */
150 HANDLE WINAPI IcmpCreateFile(VOID)
151 {
152     icmp_t* icp;
153
154     int sid=socket(AF_INET,SOCK_RAW,IPPROTO_ICMP);
155     if (sid < 0) {
156         MESSAGE("WARNING: Trying to use ICMP (network ping) will fail unless running as root\n");
157         SetLastError(ERROR_ACCESS_DENIED);
158         return INVALID_HANDLE_VALUE;
159     }
160
161     icp=HeapAlloc(GetProcessHeap(), 0, sizeof(*icp));
162     if (icp==NULL) {
163         SetLastError(IP_NO_RESOURCES);
164         return INVALID_HANDLE_VALUE;
165     }
166     icp->sid=sid;
167     icp->default_opts.OptionsSize=IP_OPTS_UNKNOWN;
168     return (HANDLE)icp;
169 }
170
171
172 /***********************************************************************
173  *              IcmpCloseHandle (IPHLPAPI.@)
174  */
175 BOOL WINAPI IcmpCloseHandle(HANDLE  IcmpHandle)
176 {
177     icmp_t* icp=(icmp_t*)IcmpHandle;
178     if (IcmpHandle==INVALID_HANDLE_VALUE) {
179         /* FIXME: in fact win98 seems to ignore the handle value !!! */
180         SetLastError(ERROR_INVALID_HANDLE);
181         return FALSE;
182     }
183
184     shutdown(icp->sid,2);
185     HeapFree(GetProcessHeap (), 0, icp);
186     return TRUE;
187 }
188
189
190 /***********************************************************************
191  *              IcmpSendEcho (IPHLPAPI.@)
192  */
193 DWORD WINAPI IcmpSendEcho(
194     HANDLE                   IcmpHandle,
195     IPAddr                   DestinationAddress,
196     LPVOID                   RequestData,
197     WORD                     RequestSize,
198     PIP_OPTION_INFORMATION   RequestOptions,
199     LPVOID                   ReplyBuffer,
200     DWORD                    ReplySize,
201     DWORD                    Timeout
202     )
203 {
204     icmp_t* icp=(icmp_t*)IcmpHandle;
205     unsigned char* reqbuf;
206     int reqsize;
207
208     struct icmp_echo_reply* ier;
209     struct ip* ip_header;
210     struct icmp* icmp_header;
211     char* endbuf;
212     int ip_header_len;
213     int maxlen;
214     struct pollfd fdr;
215     DWORD send_time,recv_time;
216     struct sockaddr_in addr;
217     unsigned int addrlen;
218     unsigned short id,seq,cksum;
219     int res;
220
221     if (IcmpHandle==INVALID_HANDLE_VALUE) {
222         /* FIXME: in fact win98 seems to ignore the handle value !!! */
223         SetLastError(ERROR_INVALID_HANDLE);
224         return 0;
225     }
226
227     if (ReplySize<sizeof(ICMP_ECHO_REPLY)+ICMP_MINLEN) {
228         SetLastError(IP_BUF_TOO_SMALL);
229         return 0;
230     }
231     /* check the request size against SO_MAX_MSG_SIZE using getsockopt */
232
233     /* Prepare the request */
234     id=getpid() & 0xFFFF;
235     seq=InterlockedIncrement(&icmp_sequence) & 0xFFFF;
236
237     reqsize=ICMP_MINLEN+RequestSize;
238     reqbuf=HeapAlloc(GetProcessHeap(), 0, reqsize);
239     if (reqbuf==NULL) {
240         SetLastError(ERROR_OUTOFMEMORY);
241         return 0;
242     }
243
244     icmp_header=(struct icmp*)reqbuf;
245     icmp_header->icmp_type=ICMP_ECHO;
246     icmp_header->icmp_code=0;
247     icmp_header->icmp_cksum=0;
248     icmp_header->icmp_id=id;
249     icmp_header->icmp_seq=seq;
250     memcpy(reqbuf+ICMP_MINLEN, RequestData, RequestSize);
251     icmp_header->icmp_cksum=cksum=in_cksum((u_short*)reqbuf,reqsize);
252
253     addr.sin_family=AF_INET;
254     addr.sin_addr.s_addr=DestinationAddress;
255     addr.sin_port=0;
256
257     if (RequestOptions!=NULL) {
258         int val;
259         if (icp->default_opts.OptionsSize==IP_OPTS_UNKNOWN) {
260             unsigned int len;
261             /* Before we mess with the options, get the default values */
262             len=sizeof(val);
263             getsockopt(icp->sid,IPPROTO_IP,IP_TTL,(char *)&val,&len);
264             icp->default_opts.Ttl=val;
265
266             len=sizeof(val);
267             getsockopt(icp->sid,IPPROTO_IP,IP_TOS,(char *)&val,&len);
268             icp->default_opts.Tos=val;
269             /* FIXME: missing: handling of IP 'flags', and all the other options */
270         }
271
272         val=RequestOptions->Ttl;
273         setsockopt(icp->sid,IPPROTO_IP,IP_TTL,(char *)&val,sizeof(val));
274         val=RequestOptions->Tos;
275         setsockopt(icp->sid,IPPROTO_IP,IP_TOS,(char *)&val,sizeof(val));
276         /* FIXME:  missing: handling of IP 'flags', and all the other options */
277
278         icp->default_opts.OptionsSize=IP_OPTS_CUSTOM;
279     } else if (icp->default_opts.OptionsSize==IP_OPTS_CUSTOM) {
280         int val;
281
282         /* Restore the default options */
283         val=icp->default_opts.Ttl;
284         setsockopt(icp->sid,IPPROTO_IP,IP_TTL,(char *)&val,sizeof(val));
285         val=icp->default_opts.Tos;
286         setsockopt(icp->sid,IPPROTO_IP,IP_TOS,(char *)&val,sizeof(val));
287         /* FIXME: missing: handling of IP 'flags', and all the other options */
288
289         icp->default_opts.OptionsSize=IP_OPTS_DEFAULT;
290     }
291
292     /* Get ready for receiving the reply
293      * Do it before we send the request to minimize the risk of introducing delays
294      */
295     fdr.fd = icp->sid;
296     fdr.events = POLLIN;
297     addrlen=sizeof(addr);
298     ier=ReplyBuffer;
299     ip_header=(struct ip *) ((char *) ReplyBuffer+sizeof(ICMP_ECHO_REPLY));
300     endbuf=(char *) ReplyBuffer+ReplySize;
301     maxlen=ReplySize-sizeof(ICMP_ECHO_REPLY);
302
303     /* Send the packet */
304     TRACE("Sending %d bytes (RequestSize=%d) to %s\n", reqsize, RequestSize, inet_ntoa(addr.sin_addr));
305 #if 0
306     if (TRACE_ON(icmp)){
307         unsigned char* buf=(unsigned char*)reqbuf;
308         int i;
309         printf("Output buffer:\n");
310         for (i=0;i<reqsize;i++)
311             printf("%2x,", buf[i]);
312         printf("\n");
313     }
314 #endif
315
316     send_time = GetTickCount();
317     res=sendto(icp->sid, reqbuf, reqsize, 0, (struct sockaddr*)&addr, sizeof(addr));
318     HeapFree(GetProcessHeap (), 0, reqbuf);
319     if (res<0) {
320         if (errno==EMSGSIZE)
321             SetLastError(IP_PACKET_TOO_BIG);
322         else {
323             switch (errno) {
324             case ENETUNREACH:
325                 SetLastError(IP_DEST_NET_UNREACHABLE);
326                 break;
327             case EHOSTUNREACH:
328                 SetLastError(IP_DEST_HOST_UNREACHABLE);
329                 break;
330             default:
331                 TRACE("unknown error: errno=%d\n",errno);
332                 SetLastError(IP_GENERAL_FAILURE);
333             }
334         }
335         return 0;
336     }
337
338     /* Get the reply */
339     ip_header_len=0; /* because gcc was complaining */
340     while (poll(&fdr,1,Timeout)>0) {
341         recv_time = GetTickCount();
342         res=recvfrom(icp->sid, (char*)ip_header, maxlen, 0, (struct sockaddr*)&addr,&addrlen);
343         TRACE("received %d bytes from %s\n",res, inet_ntoa(addr.sin_addr));
344         ier->Status=IP_REQ_TIMED_OUT;
345
346         /* Check whether we should ignore this packet */
347         if ((ip_header->ip_p==IPPROTO_ICMP) && (res>=sizeof(struct ip)+ICMP_MINLEN)) {
348             ip_header_len=ip_header->ip_hl << 2;
349             icmp_header=(struct icmp*)(((char*)ip_header)+ip_header_len);
350             TRACE("received an ICMP packet of type,code=%d,%d\n",icmp_header->icmp_type,icmp_header->icmp_code);
351             if (icmp_header->icmp_type==ICMP_ECHOREPLY) {
352                 if ((icmp_header->icmp_id==id) && (icmp_header->icmp_seq==seq))
353                     ier->Status=IP_SUCCESS;
354             } else {
355                 switch (icmp_header->icmp_type) {
356                 case ICMP_UNREACH:
357                     switch (icmp_header->icmp_code) {
358                     case ICMP_UNREACH_HOST:
359 #ifdef ICMP_UNREACH_HOST_UNKNOWN
360                     case ICMP_UNREACH_HOST_UNKNOWN:
361 #endif
362 #ifdef ICMP_UNREACH_ISOLATED
363                     case ICMP_UNREACH_ISOLATED:
364 #endif
365 #ifdef ICMP_UNREACH_HOST_PROHIB
366                     case ICMP_UNREACH_HOST_PROHIB:
367 #endif
368 #ifdef ICMP_UNREACH_TOSHOST
369                     case ICMP_UNREACH_TOSHOST:
370 #endif
371                         ier->Status=IP_DEST_HOST_UNREACHABLE;
372                         break;
373                     case ICMP_UNREACH_PORT:
374                         ier->Status=IP_DEST_PORT_UNREACHABLE;
375                         break;
376                     case ICMP_UNREACH_PROTOCOL:
377                         ier->Status=IP_DEST_PROT_UNREACHABLE;
378                         break;
379                     case ICMP_UNREACH_SRCFAIL:
380                         ier->Status=IP_BAD_ROUTE;
381                         break;
382                     default:
383                         ier->Status=IP_DEST_NET_UNREACHABLE;
384                     }
385                     break;
386                 case ICMP_TIMXCEED:
387                     if (icmp_header->icmp_code==ICMP_TIMXCEED_REASS)
388                         ier->Status=IP_TTL_EXPIRED_REASSEM;
389                     else
390                         ier->Status=IP_TTL_EXPIRED_TRANSIT;
391                     break;
392                 case ICMP_PARAMPROB:
393                     ier->Status=IP_PARAM_PROBLEM;
394                     break;
395                 case ICMP_SOURCEQUENCH:
396                     ier->Status=IP_SOURCE_QUENCH;
397                     break;
398                 }
399                 if (ier->Status!=IP_REQ_TIMED_OUT) {
400                     struct ip* rep_ip_header;
401                     struct icmp* rep_icmp_header;
402                     /* The ICMP header size of all the packets we accept is the same */
403                     rep_ip_header=(struct ip*)(((char*)icmp_header)+ICMP_MINLEN);
404                     rep_icmp_header=(struct icmp*)(((char*)rep_ip_header)+(rep_ip_header->ip_hl << 2));
405
406                     /* Make sure that this is really a reply to our packet */
407                     if (ip_header_len+ICMP_MINLEN+(rep_ip_header->ip_hl << 2)+ICMP_MINLEN>ip_header->ip_len) {
408                         ier->Status=IP_REQ_TIMED_OUT;
409                     } else if ((rep_icmp_header->icmp_type!=ICMP_ECHO) ||
410                         (rep_icmp_header->icmp_code!=0) ||
411                         (rep_icmp_header->icmp_id!=id) ||
412                         /* windows doesn't check this checksum, else tracert */
413                         /* behind a Linux 2.2 masquerading firewall would fail*/
414                         /* (rep_icmp_header->icmp_cksum!=cksum) || */
415                         (rep_icmp_header->icmp_seq!=seq)) {
416                         /* This was not a reply to one of our packets after all */
417                         TRACE("skipping type,code=%d,%d id,seq=%d,%d cksum=%d\n",
418                             rep_icmp_header->icmp_type,rep_icmp_header->icmp_code,
419                             rep_icmp_header->icmp_id,rep_icmp_header->icmp_seq,
420                             rep_icmp_header->icmp_cksum);
421                         TRACE("expected type,code=8,0 id,seq=%d,%d cksum=%d\n",
422                             id,seq,
423                             cksum);
424                         ier->Status=IP_REQ_TIMED_OUT;
425                     }
426                 }
427             }
428         }
429
430         if (ier->Status==IP_REQ_TIMED_OUT) {
431             /* This packet was not for us.
432              * Decrease the timeout so that we don't enter an endless loop even
433              * if we get flooded with ICMP packets that are not for us.
434              */
435             DWORD t = (recv_time - send_time);
436             if (Timeout > t) Timeout -= t;
437             else             Timeout = 0;
438             continue;
439         } else {
440             /* This is a reply to our packet */
441             memcpy(&ier->Address,&ip_header->ip_src,sizeof(IPAddr));
442             /* Status is already set */
443             ier->RoundTripTime= recv_time - send_time;
444             ier->DataSize=res-ip_header_len-ICMP_MINLEN;
445             ier->Reserved=0;
446             ier->Data=endbuf-ier->DataSize;
447             memmove(ier->Data,((char*)ip_header)+ip_header_len+ICMP_MINLEN,ier->DataSize);
448             ier->Options.Ttl=ip_header->ip_ttl;
449             ier->Options.Tos=ip_header->ip_tos;
450             ier->Options.Flags=ip_header->ip_off >> 13;
451             ier->Options.OptionsSize=ip_header_len-sizeof(struct ip);
452             if (ier->Options.OptionsSize!=0) {
453                 ier->Options.OptionsData=(unsigned char *) ier->Data-ier->Options.OptionsSize;
454                 /* FIXME: We are supposed to rearrange the option's 'source route' data */
455                 memmove(ier->Options.OptionsData,((char*)ip_header)+ip_header_len,ier->Options.OptionsSize);
456                 endbuf=(char*)ier->Options.OptionsData;
457             } else {
458                 ier->Options.OptionsData=NULL;
459                 endbuf=ier->Data;
460             }
461
462             /* Prepare for the next packet */
463             ier++;
464             ip_header=(struct ip*)(((char*)ip_header)+sizeof(ICMP_ECHO_REPLY));
465             maxlen=endbuf-(char*)ip_header;
466
467             /* Check out whether there is more but don't wait this time */
468             Timeout=0;
469         }
470     }
471     res=ier-(ICMP_ECHO_REPLY*)ReplyBuffer;
472     if (res==0)
473         SetLastError(IP_REQ_TIMED_OUT);
474     TRACE("received %d replies\n",res);
475     return res;
476 }
477
478 /***********************************************************************
479  *              IcmpSendEcho2 (IPHLPAPI.@)
480  */
481 DWORD WINAPI IcmpSendEcho2(
482     HANDLE                   IcmpHandle,
483     HANDLE                   Event,
484     PIO_APC_ROUTINE          ApcRoutine,
485     PVOID                    ApcContext,
486     IPAddr                   DestinationAddress,
487     LPVOID                   RequestData,
488     WORD                     RequestSize,
489     PIP_OPTION_INFORMATION   RequestOptions,
490     LPVOID                   ReplyBuffer,
491     DWORD                    ReplySize,
492     DWORD                    Timeout
493     )
494 {
495     TRACE("(%p, %p, %p, %p, %08x, %p, %d, %p, %p, %d, %d): stub\n", IcmpHandle,
496             Event, ApcRoutine, ApcContext, DestinationAddress, RequestData,
497             RequestSize, RequestOptions, ReplyBuffer, ReplySize, Timeout);
498
499     if (Event)
500     {
501         FIXME("unsupported for events\n");
502         return 0;
503     }
504     if (ApcRoutine)
505     {
506         FIXME("unsupported for APCs\n");
507         return 0;
508     }
509     return IcmpSendEcho(IcmpHandle, DestinationAddress, RequestData,
510             RequestSize, RequestOptions, ReplyBuffer, ReplySize, Timeout);
511 }
512
513 /*
514  * Copyright (c) 1989 The Regents of the University of California.
515  * All rights reserved.
516  *
517  * This code is derived from software contributed to Berkeley by
518  * Mike Muuss.
519  *
520  * Redistribution and use in source and binary forms, with or without
521  * modification, are permitted provided that the following conditions
522  * are met:
523  * 1. Redistributions of source code must retain the above copyright
524  *    notice, this list of conditions and the following disclaimer.
525  * 2. Redistributions in binary form must reproduce the above copyright
526  *    notice, this list of conditions and the following disclaimer in the
527  *    documentation and/or other materials provided with the distribution.
528  * 3. Neither the name of the University nor the names of its contributors
529  *    may be used to endorse or promote products derived from this software
530  *    without specific prior written permission.
531  *
532  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
533  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
534  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
535  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
536  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
537  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
538  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
539  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
540  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
541  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
542  * SUCH DAMAGE.
543  *
544  */