🚀 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