Sweden-Number/dlls/iphlpapi/icmp.c

676 lines
22 KiB
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/*
* ICMP
*
* Francois Gouget, 1999, based on the work of
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* RW Hall, 1999, based on public domain code PING.C by Mike Muus (1983)
* and later works (c) 1989 Regents of Univ. of California - see copyright
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* notice at end of source-code.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
/* Future work:
* - Systems like FreeBSD don't seem to support the IP_TTL option and maybe others.
* But using IP_HDRINCL and building the IP header by hand might work.
* - Not all IP options are supported.
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* - Are ICMP handles real handles, i.e. inheritable and all? There might be some
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* more work to do here, including server side stuff with synchronization.
* - This API should probably be thread safe. Is it really?
* - Using the winsock functions has not been tested.
*/
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#include "config.h"
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#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#ifdef HAVE_NETDB_H
# include <netdb.h>
#endif
#ifdef HAVE_NETINET_IN_SYSTM_H
# include <netinet/in_systm.h>
#endif
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#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
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#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#include <stdarg.h>
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#include <string.h>
#include <errno.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
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#ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h>
#endif
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#ifdef HAVE_SYS_POLL_H
# include <sys/poll.h>
#endif
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#define USE_WS_PREFIX
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#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "winternl.h"
#include "ipexport.h"
#include "icmpapi.h"
#include "wine/debug.h"
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/* Set up endianness macros for the ip and ip_icmp BSD headers */
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#ifndef BIG_ENDIAN
#define BIG_ENDIAN 4321
#endif
#ifndef LITTLE_ENDIAN
#define LITTLE_ENDIAN 1234
#endif
#ifndef BYTE_ORDER
#ifdef WORDS_BIGENDIAN
#define BYTE_ORDER BIG_ENDIAN
#else
#define BYTE_ORDER LITTLE_ENDIAN
#endif
#endif /* BYTE_ORDER */
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#define u_int16_t WORD
#define u_int32_t DWORD
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/* These are BSD headers. We use these here because they are needed on
* libc5 Linux systems. On other platforms they are usually simply more
* complete than the native stuff, and cause less portability problems
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* so we use them anyway.
*/
#include "ip.h"
#include "ip_icmp.h"
WINE_DEFAULT_DEBUG_CHANNEL(icmp);
WINE_DECLARE_DEBUG_CHANNEL(winediag);
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typedef struct {
int sid;
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IP_OPTION_INFORMATION default_opts;
} icmp_t;
#define IP_OPTS_UNKNOWN 0
#define IP_OPTS_DEFAULT 1
#define IP_OPTS_CUSTOM 2
#define MAXIPLEN 60
#define MAXICMPLEN 76
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/* The sequence number is unique process wide, so that all threads
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* have a distinct sequence number.
*/
static LONG icmp_sequence=0;
static int in_cksum(u_short *addr, int len)
{
int nleft=len;
u_short *w = addr;
int sum = 0;
u_short answer = 0;
while (nleft > 1) {
sum += *w++;
nleft -= 2;
}
if (nleft == 1) {
*(u_char *)(&answer) = *(u_char *)w;
sum += answer;
}
sum = (sum >> 16) + (sum & 0xffff);
sum += (sum >> 16);
answer = ~sum;
return(answer);
}
/*
* Exported Routines.
*/
/***********************************************************************
* Icmp6CreateFile (IPHLPAPI.@)
*/
HANDLE WINAPI Icmp6CreateFile(VOID)
{
icmp_t* icp;
int sid=socket(AF_INET6,SOCK_RAW,IPPROTO_ICMPV6);
if (sid < 0)
{
/* Mac OS X supports non-privileged ICMP via SOCK_DGRAM type. */
sid=socket(AF_INET6,SOCK_DGRAM,IPPROTO_ICMPV6);
}
if (sid < 0) {
ERR_(winediag)("Failed to use ICMPV6 (network ping), this requires special permissions.\n");
SetLastError(ERROR_ACCESS_DENIED);
return INVALID_HANDLE_VALUE;
}
icp=HeapAlloc(GetProcessHeap(), 0, sizeof(*icp));
if (icp==NULL) {
close(sid);
SetLastError(IP_NO_RESOURCES);
return INVALID_HANDLE_VALUE;
}
icp->sid=sid;
icp->default_opts.OptionsSize=IP_OPTS_UNKNOWN;
return (HANDLE)icp;
}
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/***********************************************************************
* Icmp6SendEcho2 (IPHLPAPI.@)
*/
DWORD WINAPI Icmp6SendEcho2(
HANDLE IcmpHandle,
HANDLE Event,
PIO_APC_ROUTINE ApcRoutine,
PVOID ApcContext,
struct sockaddr_in6* SourceAddress,
struct sockaddr_in6* DestinationAddress,
LPVOID RequestData,
WORD RequestSize,
PIP_OPTION_INFORMATION RequestOptions,
LPVOID ReplyBuffer,
DWORD ReplySize,
DWORD Timeout
)
{
FIXME("(%p, %p, %p, %p, %p, %p, %p, %d, %p, %p, %d, %d): stub\n", IcmpHandle, Event,
ApcRoutine, ApcContext, SourceAddress, DestinationAddress, RequestData,
RequestSize, RequestOptions, ReplyBuffer, ReplySize, Timeout);
SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
return 0;
}
/***********************************************************************
* IcmpCreateFile (IPHLPAPI.@)
*/
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HANDLE WINAPI IcmpCreateFile(VOID)
{
icmp_t* icp;
int sid=socket(AF_INET,SOCK_RAW,IPPROTO_ICMP);
if (sid < 0)
{
/* Mac OS X supports non-privileged ICMP via SOCK_DGRAM type. */
sid=socket(AF_INET,SOCK_DGRAM,IPPROTO_ICMP);
}
if (sid < 0) {
ERR_(winediag)("Failed to use ICMP (network ping), this requires special permissions.\n");
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SetLastError(ERROR_ACCESS_DENIED);
return INVALID_HANDLE_VALUE;
}
icp=HeapAlloc(GetProcessHeap(), 0, sizeof(*icp));
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if (icp==NULL) {
close(sid);
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SetLastError(IP_NO_RESOURCES);
return INVALID_HANDLE_VALUE;
}
icp->sid=sid;
icp->default_opts.OptionsSize=IP_OPTS_UNKNOWN;
return (HANDLE)icp;
}
/***********************************************************************
* IcmpCloseHandle (IPHLPAPI.@)
*/
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BOOL WINAPI IcmpCloseHandle(HANDLE IcmpHandle)
{
icmp_t* icp=(icmp_t*)IcmpHandle;
if (IcmpHandle==INVALID_HANDLE_VALUE) {
/* FIXME: in fact win98 seems to ignore the handle value !!! */
SetLastError(ERROR_INVALID_HANDLE);
return FALSE;
}
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close( icp->sid );
HeapFree(GetProcessHeap (), 0, icp);
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return TRUE;
}
/***********************************************************************
* IcmpSendEcho (IPHLPAPI.@)
*/
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DWORD WINAPI IcmpSendEcho(
HANDLE IcmpHandle,
IPAddr DestinationAddress,
LPVOID RequestData,
WORD RequestSize,
PIP_OPTION_INFORMATION RequestOptions,
LPVOID ReplyBuffer,
DWORD ReplySize,
DWORD Timeout
)
{
icmp_t* icp=(icmp_t*)IcmpHandle;
unsigned char *buffer;
int reqsize, repsize;
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struct icmp_echo_reply* ier;
struct ip* ip_header;
struct icmp* icmp_header;
char* endbuf;
int ip_header_len;
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struct pollfd fdr;
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DWORD send_time,recv_time;
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struct sockaddr_in addr;
socklen_t addrlen;
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unsigned short id,seq,cksum;
int res;
if (IcmpHandle==INVALID_HANDLE_VALUE) {
/* FIXME: in fact win98 seems to ignore the handle value !!! */
SetLastError(ERROR_INVALID_PARAMETER);
return 0;
}
if (!ReplyBuffer||!ReplySize) {
SetLastError(ERROR_INVALID_PARAMETER);
return 0;
}
if (ReplySize<sizeof(ICMP_ECHO_REPLY)) {
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SetLastError(IP_BUF_TOO_SMALL);
return 0;
}
/* check the request size against SO_MAX_MSG_SIZE using getsockopt */
if (!DestinationAddress) {
SetLastError(ERROR_INVALID_NETNAME);
return 0;
}
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/* Prepare the request */
id=getpid() & 0xFFFF;
seq=InterlockedIncrement(&icmp_sequence) & 0xFFFF;
reqsize=ICMP_MINLEN+RequestSize;
/* max ip header + max icmp header and error data + reply size(max 65535 on Windows) */
/* FIXME: request size of 65535 is not supported yet because max buffer size of raw socket on linux is 32767 */
repsize = MAXIPLEN + MAXICMPLEN + min( 65535, ReplySize );
buffer = HeapAlloc(GetProcessHeap(), 0, max( repsize, reqsize ));
if (buffer == NULL) {
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SetLastError(ERROR_OUTOFMEMORY);
return 0;
}
icmp_header=(struct icmp*)buffer;
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icmp_header->icmp_type=ICMP_ECHO;
icmp_header->icmp_code=0;
icmp_header->icmp_cksum=0;
icmp_header->icmp_id=id;
icmp_header->icmp_seq=seq;
memcpy(buffer+ICMP_MINLEN, RequestData, RequestSize);
icmp_header->icmp_cksum=cksum=in_cksum((u_short*)buffer,reqsize);
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addr.sin_family=AF_INET;
addr.sin_addr.s_addr=DestinationAddress;
addr.sin_port=0;
if (RequestOptions!=NULL) {
int val;
if (icp->default_opts.OptionsSize==IP_OPTS_UNKNOWN) {
socklen_t len;
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/* Before we mess with the options, get the default values */
len=sizeof(val);
getsockopt(icp->sid,IPPROTO_IP,IP_TTL,(char *)&val,&len);
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icp->default_opts.Ttl=val;
len=sizeof(val);
getsockopt(icp->sid,IPPROTO_IP,IP_TOS,(char *)&val,&len);
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icp->default_opts.Tos=val;
/* FIXME: missing: handling of IP 'flags', and all the other options */
}
val=RequestOptions->Ttl;
setsockopt(icp->sid,IPPROTO_IP,IP_TTL,(char *)&val,sizeof(val));
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val=RequestOptions->Tos;
setsockopt(icp->sid,IPPROTO_IP,IP_TOS,(char *)&val,sizeof(val));
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/* FIXME: missing: handling of IP 'flags', and all the other options */
icp->default_opts.OptionsSize=IP_OPTS_CUSTOM;
} else if (icp->default_opts.OptionsSize==IP_OPTS_CUSTOM) {
int val;
/* Restore the default options */
val=icp->default_opts.Ttl;
setsockopt(icp->sid,IPPROTO_IP,IP_TTL,(char *)&val,sizeof(val));
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val=icp->default_opts.Tos;
setsockopt(icp->sid,IPPROTO_IP,IP_TOS,(char *)&val,sizeof(val));
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/* FIXME: missing: handling of IP 'flags', and all the other options */
icp->default_opts.OptionsSize=IP_OPTS_DEFAULT;
}
/* Get ready for receiving the reply
* Do it before we send the request to minimize the risk of introducing delays
*/
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fdr.fd = icp->sid;
fdr.events = POLLIN;
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addrlen=sizeof(addr);
ier=ReplyBuffer;
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endbuf=(char *) ReplyBuffer+ReplySize;
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/* Send the packet */
TRACE("Sending %d bytes (RequestSize=%d) to %s\n", reqsize, RequestSize, inet_ntoa(addr.sin_addr));
#if 0
if (TRACE_ON(icmp)){
int i;
printf("Output buffer:\n");
for (i=0;i<reqsize;i++)
printf("%2x,", buffer[i]);
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printf("\n");
}
#endif
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send_time = GetTickCount();
res=sendto(icp->sid, buffer, reqsize, 0, (struct sockaddr*)&addr, sizeof(addr));
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if (res<0) {
if (errno==EMSGSIZE)
SetLastError(IP_PACKET_TOO_BIG);
else {
switch (errno) {
case ENETUNREACH:
SetLastError(IP_DEST_NET_UNREACHABLE);
break;
case EHOSTUNREACH:
SetLastError(IP_DEST_HOST_UNREACHABLE);
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break;
default:
TRACE("unknown error: errno=%d\n",errno);
SetLastError(IP_GENERAL_FAILURE);
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}
}
HeapFree(GetProcessHeap(), 0, buffer);
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return 0;
}
/* Get the reply */
ip_header=(struct ip*)buffer;
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ip_header_len=0; /* because gcc was complaining */
while (poll(&fdr,1,Timeout)>0) {
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recv_time = GetTickCount();
res=recvfrom(icp->sid, buffer, repsize, 0, (struct sockaddr*)&addr, &addrlen);
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TRACE("received %d bytes from %s\n",res, inet_ntoa(addr.sin_addr));
ier->Status=IP_REQ_TIMED_OUT;
/* Check whether we should ignore this packet */
if ((ip_header->ip_p==IPPROTO_ICMP) && (res>=sizeof(struct ip)+ICMP_MINLEN)) {
ip_header_len=ip_header->ip_hl << 2;
icmp_header=(struct icmp*)(((char*)ip_header)+ip_header_len);
TRACE("received an ICMP packet of type,code=%d,%d\n",icmp_header->icmp_type,icmp_header->icmp_code);
if (icmp_header->icmp_type==ICMP_ECHOREPLY) {
if ((icmp_header->icmp_id==id) && (icmp_header->icmp_seq==seq))
{
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ier->Status=IP_SUCCESS;
SetLastError(NO_ERROR);
}
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} else {
switch (icmp_header->icmp_type) {
case ICMP_UNREACH:
switch (icmp_header->icmp_code) {
case ICMP_UNREACH_HOST:
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#ifdef ICMP_UNREACH_HOST_UNKNOWN
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case ICMP_UNREACH_HOST_UNKNOWN:
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#endif
#ifdef ICMP_UNREACH_ISOLATED
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case ICMP_UNREACH_ISOLATED:
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#endif
#ifdef ICMP_UNREACH_HOST_PROHIB
case ICMP_UNREACH_HOST_PROHIB:
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#endif
#ifdef ICMP_UNREACH_TOSHOST
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case ICMP_UNREACH_TOSHOST:
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#endif
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ier->Status=IP_DEST_HOST_UNREACHABLE;
break;
case ICMP_UNREACH_PORT:
ier->Status=IP_DEST_PORT_UNREACHABLE;
break;
case ICMP_UNREACH_PROTOCOL:
ier->Status=IP_DEST_PROT_UNREACHABLE;
break;
case ICMP_UNREACH_SRCFAIL:
ier->Status=IP_BAD_ROUTE;
break;
default:
ier->Status=IP_DEST_NET_UNREACHABLE;
}
break;
case ICMP_TIMXCEED:
if (icmp_header->icmp_code==ICMP_TIMXCEED_REASS)
ier->Status=IP_TTL_EXPIRED_REASSEM;
else
ier->Status=IP_TTL_EXPIRED_TRANSIT;
break;
case ICMP_PARAMPROB:
ier->Status=IP_PARAM_PROBLEM;
break;
case ICMP_SOURCEQUENCH:
ier->Status=IP_SOURCE_QUENCH;
break;
}
if (ier->Status!=IP_REQ_TIMED_OUT) {
struct ip* rep_ip_header;
struct icmp* rep_icmp_header;
/* The ICMP header size of all the packets we accept is the same */
rep_ip_header=(struct ip*)(((char*)icmp_header)+ICMP_MINLEN);
rep_icmp_header=(struct icmp*)(((char*)rep_ip_header)+(rep_ip_header->ip_hl << 2));
/* Make sure that this is really a reply to our packet */
if (ip_header_len+ICMP_MINLEN+(rep_ip_header->ip_hl << 2)+ICMP_MINLEN>ip_header->ip_len) {
ier->Status=IP_REQ_TIMED_OUT;
} else if ((rep_icmp_header->icmp_type!=ICMP_ECHO) ||
(rep_icmp_header->icmp_code!=0) ||
(rep_icmp_header->icmp_id!=id) ||
/* windows doesn't check this checksum, else tracert */
/* behind a Linux 2.2 masquerading firewall would fail*/
/* (rep_icmp_header->icmp_cksum!=cksum) || */
(rep_icmp_header->icmp_seq!=seq)) {
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/* This was not a reply to one of our packets after all */
TRACE("skipping type,code=%d,%d id,seq=%d,%d cksum=%d\n",
rep_icmp_header->icmp_type,rep_icmp_header->icmp_code,
rep_icmp_header->icmp_id,rep_icmp_header->icmp_seq,
rep_icmp_header->icmp_cksum);
TRACE("expected type,code=8,0 id,seq=%d,%d cksum=%d\n",
id,seq,
cksum);
ier->Status=IP_REQ_TIMED_OUT;
}
}
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}
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}
if (ier->Status==IP_REQ_TIMED_OUT) {
/* This packet was not for us.
* Decrease the timeout so that we don't enter an endless loop even
* if we get flooded with ICMP packets that are not for us.
*/
DWORD t = (recv_time - send_time);
if (Timeout > t) Timeout -= t;
else Timeout = 0;
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continue;
} else {
/* Check free space, should be large enough for an ICMP_ECHO_REPLY and remainning icmp data */
if (endbuf-(char *)ier < sizeof(struct icmp_echo_reply)+(res-ip_header_len-ICMP_MINLEN)) {
res=ier-(ICMP_ECHO_REPLY *)ReplyBuffer;
SetLastError(IP_GENERAL_FAILURE);
goto done;
}
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/* This is a reply to our packet */
memcpy(&ier->Address,&ip_header->ip_src,sizeof(IPAddr));
/* Status is already set */
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ier->RoundTripTime= recv_time - send_time;
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ier->DataSize=res-ip_header_len-ICMP_MINLEN;
ier->Reserved=0;
ier->Data=endbuf-ier->DataSize;
memcpy(ier->Data, ((char *)ip_header)+ip_header_len+ICMP_MINLEN, ier->DataSize);
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ier->Options.Ttl=ip_header->ip_ttl;
ier->Options.Tos=ip_header->ip_tos;
ier->Options.Flags=ip_header->ip_off >> 13;
ier->Options.OptionsSize=ip_header_len-sizeof(struct ip);
if (ier->Options.OptionsSize!=0) {
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ier->Options.OptionsData=(unsigned char *) ier->Data-ier->Options.OptionsSize;
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/* FIXME: We are supposed to rearrange the option's 'source route' data */
memcpy(ier->Options.OptionsData, ((char *)ip_header)+ip_header_len, ier->Options.OptionsSize);
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endbuf=(char*)ier->Options.OptionsData;
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} else {
ier->Options.OptionsData=NULL;
endbuf=ier->Data;
}
/* Prepare for the next packet */
endbuf-=ier->DataSize;
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ier++;
/* Check out whether there is more but don't wait this time */
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Timeout=0;
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}
}
res=ier-(ICMP_ECHO_REPLY*)ReplyBuffer;
if (res==0)
SetLastError(IP_REQ_TIMED_OUT);
done:
HeapFree(GetProcessHeap(), 0, buffer);
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TRACE("received %d replies\n",res);
return res;
}
/***********************************************************************
* IcmpSendEcho2 (IPHLPAPI.@)
*/
DWORD WINAPI IcmpSendEcho2(
HANDLE IcmpHandle,
HANDLE Event,
PIO_APC_ROUTINE ApcRoutine,
PVOID ApcContext,
IPAddr DestinationAddress,
LPVOID RequestData,
WORD RequestSize,
PIP_OPTION_INFORMATION RequestOptions,
LPVOID ReplyBuffer,
DWORD ReplySize,
DWORD Timeout
)
{
TRACE("(%p, %p, %p, %p, %08x, %p, %d, %p, %p, %d, %d): stub\n", IcmpHandle,
Event, ApcRoutine, ApcContext, DestinationAddress, RequestData,
RequestSize, RequestOptions, ReplyBuffer, ReplySize, Timeout);
if (Event)
{
FIXME("unsupported for events\n");
return 0;
}
if (ApcRoutine)
{
FIXME("unsupported for APCs\n");
return 0;
}
return IcmpSendEcho(IcmpHandle, DestinationAddress, RequestData,
RequestSize, RequestOptions, ReplyBuffer, ReplySize, Timeout);
}
/***********************************************************************
* IcmpSendEcho2Ex (IPHLPAPI.@)
*/
DWORD WINAPI IcmpSendEcho2Ex(
HANDLE IcmpHandle,
HANDLE Event,
PIO_APC_ROUTINE ApcRoutine,
PVOID ApcContext,
IPAddr SourceAddress,
IPAddr DestinationAddress,
LPVOID RequestData,
WORD RequestSize,
PIP_OPTION_INFORMATION RequestOptions,
LPVOID ReplyBuffer,
DWORD ReplySize,
DWORD Timeout
)
{
TRACE("(%p, %p, %p, %p, %08x, %08x, %p, %d, %p, %p, %d, %d): stub\n", IcmpHandle,
Event, ApcRoutine, ApcContext, SourceAddress, DestinationAddress, RequestData,
RequestSize, RequestOptions, ReplyBuffer, ReplySize, Timeout);
if (Event)
{
FIXME("unsupported for events\n");
return 0;
}
if (ApcRoutine)
{
FIXME("unsupported for APCs\n");
return 0;
}
if (SourceAddress)
{
FIXME("unsupported for source addresses\n");
return 0;
}
return IcmpSendEcho(IcmpHandle, DestinationAddress, RequestData,
RequestSize, RequestOptions, ReplyBuffer, ReplySize, Timeout);
}
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/*
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Mike Muuss.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
1999-11-07 22:22:17 +01:00
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/