Date: Sat, 16 Feb 2008 12:11:46 +0400 From: "Tofig Suleymanov" <tofig@freebsd.az> To: hackers@freebsd.org Subject: if_start() and sending packets problem Message-ID: <342414370802160011s7fc3edc2w5feb45ce788930c5@mail.gmail.com>
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Hello hackers, I will be grateful if someone could point me to the right direction regarding the question below. My device driver is getting incoming packets fine, but for some reason I am not able to send a single packet. Here is the source code: http://www.freebsd.az/if_ib.c I've added several debug messages to the source and here is the output: (bringing interface up and assigning the ip/netmask combination) ifconfig ib0 192.168.0.6 netmask 255.255.255.0 up (At this moment I get this in my /var/log/messages. It seems to be a gratuitous arp who-has packet ) Feb 7 19:14:32 schizo kernel: ib_init entered Feb 7 19:14:32 schizo kernel: ib_start entered Feb 7 19:14:32 schizo kernel: ib_encap entered Feb 7 19:14:32 schizo kernel: DHOST ff ff ff ff ff ff Feb 7 19:14:32 schizo kernel: SHOST 0 c0 ee 22 3 14 Feb 7 19:14:32 schizo kernel: txeof entered Feb 7 19:14:32 schizo kernel: txeof exiting (now I try pinging, but no joy . I've added extra debug messages inside ping.c) schizo# ping 192.168.0.1 PING 192.168.0.1 (192.168.0.1): 56 data bytes packets sent: -1 ping: sendto: Invalid argument packets sent: -1 ping: sendto: Invalid argument packets sent: -1 ping: sendto: Invalid argument ^C --- 192.168.0.1 ping statistics --- 3 packets transmitted, 0 packets received, 100% packet loss I have also tried to add debug messages to sys/net/if.c and sys/net/netisr.c and it seems that the kernel doesn't even try to run my ib_start() function. Doing tcpdump on the interface and pinging does not show any packets flowing. Please note that tcpdump shows the arp who-has request right after I assign the ip address. ifconfig ib0 gives the following: ib0: flags=1008c3<UP,BROADCAST,RUNNING,NOARP,SIMPLEX,NEEDSGIANT> mtu 1500 inet 192.168.0.5 netmask 0xffffff00 broadcast 192.168.0.255 ether 00:c0:ee:22:03:14 media: Ethernet 10baseT/UTP status: active netstat -in gives the following output: Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll bge0* 1500 <Link#1> 00:16:41:52:fb:1e 0 0 0 0 0 iwi0 1500 <Link#2> 00:13:ce:cc:b8:10 3065 0 2856 0 0 iwi0 1500 192.168.1 192.168.1.5 3034 - 2825 - - lo0 16384 <Link#3> 8 0 8 0 0 lo0 16384 127 127.0.0.1 8 - 8 - - ib0 1500 <Link#4> 00:c0:ee:22:03:14 4 0 2 0 0 ib0 1500 192.168.0 192.168.0.5 0 - 3 - - Any ideas are highly appreciated.
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