Thank you Andreas and Christophe for helping resolve the rtroute issue.
The messed up routing table was likely as a result of my various attempts
to get it working.
Unfortunately, now that I've hopefully corrected the RTnet routing table,
rtping hangs after printing, "Real-time PING 10.0.0.2 56(84) bytes of
data".
Perhaps related, the receiver side (@10.0.0.2) of a trivial UDP
client/server
utility does not receive the UDP packets the server side is sending (both
when
sent locally to receiver (compiled and linked against cobalt), and when
sent
from 10.0.0.5 - these I can see being sent using wireshark).
I've only configured the rteth0 interface, not rtlo.
# ./rtroute
Host Routing Table
Hash Destination HW Address Device
02 10.0.0.2 5C:F9:DD:74:9C:27 rteth0 - local
Xenomai/RTnet NIC
05 10.0.0.5 D4:BE:D9:1F:88:C2 rteth0 - remote Linux
07 192.168.1.71 98:DE:D0:03:80:CA rteth0 - local 2nd NIC
3F 10.255.255.255 FF:FF:FF:FF:FF:FF rteth0
# ./rtping 10.0.0.2/ - never returns/
Real-time PING 10.0.0.2 56(84) bytes of data.
^C
--- 10.0.0.2 rtping statistics ---
3 packets transmitted, 0 received, 100% packet loss
worst case rtt = 0.0 us
# ./rtping 10.0.0.5/ - and 10.0.0.5 can ping successfully Xenomai/RTnet/
Real-time PING 10.0.0.5 56(84) bytes of data.
64 bytes from 10.0.0.5: icmp_seq=1 time=494.3 us
64 bytes from 10.0.0.5: icmp_seq=2 time=442.9 us
64 bytes from 10.0.0.5: icmp_seq=3 time=600.4 us
^C
--- 10.0.0.5 rtping statistics ---
3 packets transmitted, 3 received, 0% packet loss
worst case rtt = 600.4 us
# ./rtping 192.168.1.71/ - never returns/
Real-time PING 192.168.1.71 56(84) bytes of data.
^C
--- 192.168.1.71 rtping statistics ---
5 packets transmitted, 0 received, 100% packet loss
worst case rtt = 0.0 us
# lsmod
Module Size Used by
rt_loopback 1325 1
rtpacket 6714 0
rtudp 10708 1/ - in use by UDP receiver
app/
rt_e1000e 100022 1
rtipv4 22182 1 rtudp
rtnet 44399 5
rtipv4,rt_loopback,rt_e1000e,rtpacket,rtudp
uio_netx 2273 0
uio 8037 1 uio_netx
x86_pkg_temp_thermal 5495 0
r8169 68092 0
(gdb) r 10.0.0.2
Starting program: udpreceiver 10.0.0.2
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x771ea700 (LWP 18990)]
^C
Program received signal SIGINT, Interrupt.
0x77bcbf31 in do_recvmsg () from /usr/xenomai/lib/libcobalt.so.2
(gdb)
# dmesg
*** RTnet for Xenomai v3.0.5 ***
[163539.835443] RTnet: initialising real-time networking
[163539.838668] rt_e1000e: Intel(R) PRO/1000 Network Driver - 1.5.1-k-rt
[163539.838669] rt_e1000e: Copyright(c) 1999 - 2011 Intel Corporation.
[163540.117612] RTnet: registered rteth0
[163540.117614] rt_e1000e: (PCI Express:2.5GT/s:Width x1) 5c:f9:dd:74:9c:27
[163540.117615] rt_e1000e: Intel(R) PRO/1000 Network Connection
[163540.117658] rt_e1000e: MAC: 10, PHY: 11, PBA No: E041FF-0FF
[163540.121339] initializing loopback...
[163540.121346] RTnet: registered rtlo
[163542.116317] e1000e: rteth0 NIC Link is Up 100 Mbps Full Duplex, Flow
Control: Rx/Tx
[163542.116318] rt_e1000e: 10/100 speed: disabling TSO
[170147.661471] RTnet: host 10.0.0.5 unreachable
[170148.662587] RTnet: host 10.0.0.5 unreachable
[170149.663781] RTnet: host 10.0.0.5 unreachable
[170150.664909] RTnet: host 10.0.0.5 unreachable
[170151.666105] RTnet: host 10.0.0.5 unreachable
[170152.667286] RTnet: host 10.0.0.5 unreachable
# lsmod
Module Size Used by
rt_loopback 1325 1
rtpacket 6714 0
rtudp 10708 1
rt_e1000e 100022 1
rtipv4 22182 1 rtudp
rtnet 44399 5
rtipv4,rt_loopback,rt_e1000e,rtpacket,rtudp
uio_netx 2273 0
uio 8037 1 uio_netx
x86_pkg_temp_thermal 5495 0
r8169 68092 0
# strace ./rtping 10.0.0.2
execve("./rtping", ["./rtping", "10.0.0.2"], [/* 44 vars */]) = 0
brk(0) =
0x14b3000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f2bd17d
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=114787, ...}) = 0
mmap(NULL, 114787, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f2bd17b3000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3,
"\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\34\2\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1738176, ...}) = 0
mmap(NULL, 3844640, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWR
