Hi!
I try to check TUN/TAP packet driver functionality but some
aspects are unclear to me. First, I made persistent device
tap0 with tunctl from User Mode Linux. Then I created
script /etc/sysconfig/network-scripts/ifcfg-tap0:
DEVICE=tap0
BOOTPROTO=static
IPADDR=192.168.57.15
NETMASK=255.255.255.0
NETWORK=192.168.57.0
BROADCAST=192.168.57.255
ONBOOT=yes
IPXNETNUM_802_2=00000003
IPXPRIMARY_802_2="no"
IPXACTIVE_802_2="yes"
So after "ifup tap0" I have:
$ /sbin/ifconfig
...
tap0 Link encap:Ethernet HWaddr 00:FF:F7:35:8D:7D
inet addr:192.168.57.15 Bcast:192.168.57.255 Mask:255.255.255.0
IPX/Ethernet 802.2 addr:00000003:00FFF7358D7D
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:193 errors:0 dropped:0 overruns:0 frame:0
TX packets:1121 errors:0 dropped:4298 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:11580 (11.3 Kb) TX bytes:186105 (181.7 Kb)
$ /sbin/route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.57.0 0.0.0.0 255.255.255.0 U 0 0 0 tap0
172.16.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 172.16.0.100 0.0.0.0 UG 0 0 0 eth0
In ~/.dosemurc :
$_pktdriver = (on)
$_netdev = "tap0"
$_vnet = "tap"
Also I got Waterloo TCP/IP utils:
http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/net/wattcp/wat2001b.zip
and made config for them (~/dosemu/freedos/net/tcp.cfg):
my_ip=192.168.57.14
netmask=255.255.255.0
gateway=192.168.57.15
Then in dosemu I start tcpinfo:
C:\NET>tcpinfo
Reading Waterloo TCP configuration file.
Ethernet Address : 64:62:a6:90:78:78
IP Address : 192.168.57.14
Network Mask : 255.255.255.0
Gateways : GATEWAY'S IP SUBNET SUBNET MASK
: 192.168.57.15 DEFAULT
Cookieserver : NONE DEFINED
Nameserver : NONE DEFINED
Domain : "(null)"
Ping from dosemu to Linux host goes well:
C:\NET>ping 192.168.57.15 2
Pinging [192.168.57.15] 2 times once per_second
sent PING # 1 , PING receipt # 1 : response time 0.00 seconds
sent PING # 2 , PING receipt # 2 : response time 0.00 seconds
C:\NET>ping 172.16.0.57 2
Pinging [172.16.0.57] 2 times once per_second
sent PING # 1 , PING receipt # 1 : response time 0.00 seconds
sent PING # 2 , PING receipt # 2 : response time 0.00 seconds
But not from host to dosemu:
$ ping 192.168.57.14
PING 192.168.57.14 (192.168.57.14) 56(84) bytes of data.
>From 192.168.57.15 icmp_seq=1 Destination Host Unreachable
>From 192.168.57.15 icmp_seq=2 Destination Host Unreachable
>From 192.168.57.15 icmp_seq=3 Destination Host Unreachable
If I start bridging between tap0 and eth0 then I even can't
ping host from dosemu:
$ sudo /sbin/brctl addbr br0
$ sudo /sbin/brctl addif br0 tap0
$ sudo /sbin/brctl addif br0 eth0
C:\NET>ping 192.168.57.15 2
Pinging [192.168.57.15] 2 times once per_second
PING: Cannot resolve host's hardware address
So my question is: where am I wrong and what also should
be tuned?
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