Problem testing sflow

 ./sflsp -d eth0 -v -C 137.138.130.66 -c 6343 -s 64

creating sfl agent
sflow agent error: sfl_agent_sysError: agent: IPv6 socket open failed
(errno = 97 - Address family not supported by protocol)

calling pcap_open_live(dev=eth0, snaplen=128, promisc=0, to_ms=100, errbuf)
sending tick
sending tick
sending tick
sending tick
sflow agent error: sfl_agent_sysError: receiver: socket sendto error
(errno = 22 - Invalid argument)
agentCB_getCounters
.....

So, as you can see the error is from the sendto function and the error
code implies an invalid argument.
When I examine the function call with gdb I get the following
information (which are the arguments of sendto.

(gdb) print receiver->agent->receiverSocket4
$1 = 6

(gdb) print receiver->sampleCollector.data
$2 = {83886080, 16777216, 16842879, 0, 16777216, 3490119680, 16777216,
16777216, 2617245696, 16777216, 16777216, 1073741824, 50331648, 0,
4294967103, 16777216, 16777216,
  16777216, 1946157056, 16777216, 1711276032, 67108864, 1644167168, 0,
0, 0, 4521992, 21504, 20971584, 8365884, 8323328, 524544, 675017151,
2984968704, 3875883027, 151519245,
  218893066, 286265102, 353637138, 421009174, 488381210, 555753246,
623125282, 690497318, 757869354, 825241390, 892613426, 14134, 0
<repeats 427 times>}

(gdb) print receiver->sampleCollector.pktlen
$3 = 192

(the flags argument is 0)

(gdb) print receiver->receiver4
$4 = {sin_family = 2, sin_port = 0, sin_addr = {s_addr = 16777343},
sin_zero = "\000\000\000\000\000\000\000"}

(gdb) print soclen
$5 = 16

As you can see the port is 0, which is a problem. So after some
mucking about I set the port in the sockaddr struct right before the
call to sendto. And now the application seems to run clean. With
sendto returning the correct number of bytes sent.
I'm going to investigate this matter further as I dont see any reason
the port should not be set.

However, when I try to capture these packages using wireshark I have
nothing. I tried using sFlowTrend which also gives me squat.
The output from the application with -vv is the following:

creating sfl agent
sflow agent error: sfl_agent_sysError: agent: IPv6 socket open failed
(errno = 97 - Address family not supported by protocol)

calling pcap_open_live(dev=eth0, snaplen=128, promisc=0, to_ms=100, errbuf)
calling pcap_dispatch()
readPacket: 0007e9ef705e -> ffffffffffff (len = 60, captured = 60)
check clock
calling pcap_dispatch()
readPacket: 0007e9ef705e -> ffffffffffff (len = 60, captured = 60)
check clock
calling pcap_dispatch()
readPacket: 009027dc17dc -> ffffffffffff (len = 60, captured = 60)
check clock
sending tick
sending tick
calling pcap_dispatch()
readPacket: 000ffe6090c5 -> ffffffffffff (len = 60, captured = 60)
check clock
calling pcap_dispatch()
readPacket: 0007e9c781fa -> ffffffffffff (len = 60, captured = 60)
check clock
calling pcap_dispatch()
readPacket: 0011111a5f72 -> ffffffffffff (len = 60, captured = 60)
check clock
calling pcap_dispatch()

Does this indicate that samples are being sent ? I have no evidence
that suggests otherwise except the fact that the packages never seem
to appear anywhere. Even tracing traffic on the same host that the
agent is running on I am unable to capture any sflow datagrams.

I am just trying to generate some sflow datagrams from the eth0
interface and send them to a collector. I tried running the collector
both locally using the sflow5Test.awk script, and remote using ntop
and sFlowTrend.

Am I missing something here ?

-- 
Rune V. SjC8en
You always pass failure on the way to success