🚀 go-pugleaf

"DreamChaser" <NO-Spam@No-Span.net> wrote in message 
news:4859f37d@newsgroups.borland.com...

> How do I make this work?

Have you looked at Microsoft's examples yet?  Have you read RFC 791 yet?

> I've spent HOURS on the net and every search I do only
> comes up with the thousands of #define IP_OPT_RR 0x7
> references but nothing on how to use it.

For example (untested):

    #pragma pack(push, 1)
    typedef struct
    {
        BYTE type;
        BYTE length;
        BYTE pointer;
        ULONG addresses[64];
    } RecordRouteOption, *PRecordRouteOption;
    #pragma pack(pop)


    HANDLE icmp = IcmpCreateFile();
    ...
    IPAddr addr;
    char *SendData = "Hello";

    addr.S_un.S_addr = ...;

    BYTE options[sizeof(RecordRouteOption)+1] = {0};

    PRecordRouteOption option = (PRecordRouteOption) options;
    option->type = IP_OPT_RR;
    option->length = sizeof(RecordRouteOption);
    option->pointer = 4;

    (++option)->type = IP_OPT_EOL;

    IP_OPTION_INFORMATION info = {0};
    info.Ttl = ...;
    info.Tos = ...;
    info.Flags = ...;
    info.OptionsSize = sizeof(options);
    info.OptionsData = options;

    DWORD ReplySize = sizeof(ICMP_ECHO_REPLY) + strlen(SendData);
    ICMP_ECHO_REPLY *reply = (ICMP_ECHO_REPLY*) malloc(ReplySize);
    ...
    if( IcmpSendEcho(icmp, addr, SendData, strlen(SendData), &info, reply, 
ReplySize, 1000) > 0 )
    {
        // use reply->Options as needed...
    }
    ...
    free(reply);
    IcmpCloseHandle(icmp);

> Also, does IP_OPT_RR return each hop?

No.

> If not: what does it do?

It returns all of the hops together in a single reply.


Gambit 

Remy Lebeau (TeamB) wrote:
>"DreamChaser" wrote in message 
>
>> How do I make this work?
>
>Have you looked at Microsoft's examples yet?  Have you read RFC 791 yet?

Yes, always search MSDN in addition to your Googling.
http://search.msdn.microsoft.com/Default.aspx?locale=en-US&Query=IP_OPT_RR

And Wiki will point you to the RFC.
http://en.wikipedia.org/wiki/RFC-791

"Bob Gonder" <none@nowhere.invalid> wrote in message 
news:m94l54da7b5mtb6qhjrbvi8d71kkqeui4s@4ax.com...

> Yes, always search MSDN in addition to your Googling.
> http://search.msdn.microsoft.com/Default.aspx?locale=en-US&Query=IP_OPT_RR

None of those pages have code examples.  This one does, however:

    IcmpSendEcho Function
    http://msdn.microsoft.com/en-us/library/aa366050.aspx

The example does not make use of the RequestOptions parameter, though.  I 
had to piece that together by hand after reading RFC 791

> And Wiki will point you to the RFC.
> http://en.wikipedia.org/wiki/RFC-791

I prefer to always go right to the source instead when looking at RFCs:

    http://www.ietf.org/rfc/rfc0791.txt



Gambit 

Bob Gonder wrote:
> Remy Lebeau (TeamB) wrote:
>> "DreamChaser" wrote in message 
>>
>>> How do I make this work?
>> Have you looked at Microsoft's examples yet?  Have you read RFC 791 yet?
> 
> Yes, always search MSDN in addition to your Googling.
> http://search.msdn.microsoft.com/Default.aspx?locale=en-US&Query=IP_OPT_RR
> 
> And Wiki will point you to the RFC.
> http://en.wikipedia.org/wiki/RFC-791
> 
Thanks guys. When I said that I had spent hours on the Net... It was 
mostly on the msdn site and I couldn't find ANY examples of how to use 
the OptionsData.

I will try G's code later tonight. Thanks again
DC

Remy Lebeau (TeamB) wrote:
> "DreamChaser" <NO-Spam@No-Span.net> wrote in message 
> news:4859f37d@newsgroups.borland.com...
> 
>> Also, does IP_OPT_RR return each hop?
> 
> No.
> 
>> If not: what does it do?
> 
> It returns all of the hops together in a single reply.
> 
I guess I should have been explicate. I meant if it returned information 
about each that was made along the way. I was thinking it would be an 
array of replies that contained all the hops.

Thanks G

DC

"DreamChaser" <NO-Spam@No-Span.net> wrote in message 
news:485c2993$1@newsgroups.borland.com...

> I guess I should have been explicate. I meant if it returned
> information about each that was made along the way. I
> was thinking it would be an array of replies that contained
> all the hops.

Yes, it does return an array.  So you have to make sure your buffer is large 
enough to hold multiple reply items.


Gambit