Yemi,
COOL. I have seen others to comment on it. When you are ready with the
"final" patch just open an bugzilla entry and attach the patch to it
(diff -udpr). Post the bugzilla # and someone will take care of the
thing.
Martin
--- Adeyemi Adesanya <[EMAIL PROTECTED]> wrote:
>
> OK,
>
> To those of you who have been waiting for my Ganglia host spoofing
> mod/hack - I'm sorry! Time to put the powers of open source
> development to work. This modification of mine will allow you to send
>
> gmetric messages on behalf of another host. This host may be real or
>
> imaginary. No steps are taken to verify the host name and IP you
> provide to gmetric!!!
>
> Example:
>
> gmetric --conf=/var/ganglia/gmond.conf --
> spoof=123.456.678.901:YemiAbstractDevice --name=speed --value=35 --
> units=mph --type=uint8
>
> Will cause recipient gmond daemons to insert the metric update under
>
> the host name "YemiAbstractDevice" with the IP address
> 123.456.678.901 .
>
> This may prove to be invaluable for monitoring SNMP devices or
> anything else you cannot run gmond on directly.
>
> To implement this feature I added a spoof gmetric message structure
> to the xdr protocol. The spoof data consists of the fake name and IP
>
> address along with the regular gmetric data. Nothing fancy. When
> gmond gets this message it uses the spoof data instead of taking the
>
> info from the IP header. Once the data is inserted into the gmond
> hash table it is indistinguishable. You can see this by querying the
>
> XML port.
>
> This is a first attempt and I hope that we can revise and improve
> this code in order to get it into a future release. We should
> consider the security implications of this feature. I suggest you
> restrict your user's access to this patched implementation for now.
>
>
> Below are patches for the ganglia-3.0.3 source code files:
>
> lib/protocol.x
> lib/libgmond.c
> lib/ganglia.h
> gmond/gmond.c
> gmetric/gmetric.c
>
> Save the patches to patchfiles and use the patch command:
>
> patch <originalfile> <patchfile>
>
> The only other mod required is to gmetric/cmdline.sh . Just add the
> following option line to this file and run gengetopt:
> option "spoof" S "IP address and name of host/device (colon
> separated) we are spoofing" string default="" no
>
> I think gmetric/cmdline.sh may only be available from the CVS source
>
> tree.
>
> That's it. recompile and try sending a spoof message to a modified
> gmond. I look forward to your feedback. Let's see if we can get this
>
> (or something like it) in an upcoming release.
>
> -------
> Yemi
>
>
>
>
> ===== Use the following to patch lib/protocol.x ==========
> 26a27,33
> > /* Yemi */
> > struct Ganglia_spoof_message {
> > string spoofName<>;
> > string spoofIP<>;
> > struct Ganglia_gmetric_message gmetric;
> > };
> >
> 95c102,104
> < GANGLIA_NUM_25_METRICS /* this should always directly follow the
>
> last 25 metric_* */
> ---
> > GANGLIA_NUM_25_METRICS, /* this should always directly follow
> the last 25 metric_* */
> > /* Yemi */
> > spoof_metric
> 100a110,112
> > /* Yemi */
> > case spoof_metric:
> > Ganglia_spoof_message spmetric;
> ===== Use the following to patch lib/libgmond.c ==========
> 702a703,750
> > // Yemi
> > int
> > Ganglia_gmetric_send_spoof( Ganglia_gmetric gmetric,
> Ganglia_udp_send_channels send_channels, char* spoof_info)
> > {
> > int len;
> > XDR x;
> > char gmetricmsg[1500];
> > Ganglia_message msg;
> > char *spoofName;
> > char *spoofIP;
> > char *buff;
> > int spoof_info_len;
> > int result;
> >
> > spoof_info_len = strlen(spoof_info);
> > buff = malloc(spoof_info_len+1);
> > strcpy(buff,spoof_info);
> > spoofIP = buff;
> > if( !(spoofName = strchr(buff+1,':')) ){
> > fprintf(stderr,"Incorrect format for spoof argument.
> exiting.
> \n");
> > exit(1);
> > }
> > *spoofName = 0;
> > spoofName++;
> > if(!(*spoofName)){
> > fprintf(stderr,"Incorrect format for spoof argument.
> exiting.
> \n");
> > exit(1);
> > }
> > printf(" spoofName: %s spoofIP: %s \n",spoofName,spoofIP);
> >
> > msg.id = spoof_metric;
> >
> > msg.Ganglia_message_u.spmetric.spoofName = spoofName;
> > msg.Ganglia_message_u.spmetric.spoofIP = spoofIP;
> > msg.Ganglia_message_u.spmetric.gmetric = *(gmetric->msg);
> >
> > // memcpy( &(msg.Ganglia_message_u.gmetric), gmetric->msg,
> sizeof
> (Ganglia_gmetric_message));
> >
> > /* Send the message */
> > xdrmem_create(&x, gmetricmsg, 1500, XDR_ENCODE);
> > xdr_Ganglia_message(&x, &msg);
> > len = xdr_getpos(&x);
> > result = Ganglia_udp_send_message( send_channels, gmetricmsg,
> len);
> > free(buff);
> > return result;
> >
> > }
> >
> ===== Use the following to patch lib/ganglia.h ==========
> 60a61,62
> > // Yemi
> > int Ganglia_gmetric_send_spoof( Ganglia_gmetric gmetric,
> Ganglia_udp_send_channels send_channels, char* spoof_info);
> ===== Use the following to patch gmond/gmond.c ==========
> 581c581
> <
> ---
> > // Yemi
> 583c583
> < Ganglia_host_get( char *remoteip, apr_sockaddr_t *sa,
> Ganglia_message *fullmsg)
> ---
> > Ganglia_host_get( char *remIP, apr_sockaddr_t *sa, Ganglia_message
>
> *fullmsg)
> 589c589,590
> <
> ---
> > char *remoteip = remIP;
> >
> 593a595,599
> >
> > if(fullmsg->id == spoof_metric){
> > hostname = fullmsg->Ganglia_message_u.spmetric.spoofName;
> > remoteip = fullmsg->Ganglia_message_u.spmetric.spoofIP;
> > }
> 741a748,756
> > // Yemi
> > static Ganglia_metric *
> > Ganglia_message_find_spmetric( Ganglia_host *host, Ganglia_message
>
> *message)
> > {
> > /* Keyed on the name element of the gmetric sent */
> > return (Ganglia_metric *)apr_hash_get( host->gmetrics,
> > message-
> >Ganglia_message_u.spmetric.gmetric.name,
> > APR_HASH_KEY_STRING);
> > }
> 756c771
> <
> ---
> >
> 764a780,784
> > // Yemi
> > else if(message->id == spoof_metric)
> > {
> > metric = Ganglia_message_find_spmetric( host, message);
> > }
> 787a808,812
> > // Yemi
> > if(message->id == spoof_metric)
> > {
> > metric->name = apr_pstrdup( metric->pool, message-
> >Ganglia_message_u.spmetric.gmetric.name );
> > }
> 796c821,823
> < memcpy(&(metric->message), message, sizeof(Ganglia_message));
> ---
> > // Yemi
> > if(message->id == spoof_metric){
> > // Store data as regular gmetric in hash table!!
> 798c825,833
> < if(message->id == metric_user_defined)
> ---
> > metric->message.id = metric_user_defined;
> > metric->message.Ganglia_message_u.gmetric = message-
> >Ganglia_message_u.spmetric.gmetric;
> >
> >
> > }else{
> > memcpy(&(metric->message), message,
> sizeof(Ganglia_message));
> > }
> >
> > if(message->id == metric_user_defined || message->id ==
> spoof_metric)
> ===== Use the following to patch gmetric/gmetric.c ==========
> 75c75,81
> < rval = Ganglia_gmetric_send(gmetric, send_channels);
> ---
> > //Yemi
> > if(!strlen(args_info.spoof_arg))
> > {
> > rval = Ganglia_gmetric_send(gmetric, send_channels);
> > }else{
> > rval = Ganglia_gmetric_send_spoof(gmetric,
> send_channels,args_info.spoof_arg);
> > }
> ==== end of patches =======
>
>
>
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>
>
------------------------------------------------------
Martin Knoblauch
email: k n o b i AT knobisoft DOT de
www: http://www.knobisoft.de
