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Old 01-27-2009, 02:01 PM   #1
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Registered: Jan 2009
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Post Need Help with ip_output()

hi all!
I am trying to build a kernel module which requires me to use the ip_output() function.

I have included the header file "<include/net/ip.h>"
which contains the declaration for ip_output().

when I compile with

make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules

I get the warning below:
WARNING: "ip_output" [/home/eric/Desktop/modelnet/linux_module/linuxmodelnet.ko] undefined!

How do I get it to see the definition which is in "<net/ipv4/ip_output.c>"
Any help will be very much appreciated

Last edited by setutsi; 01-30-2009 at 05:58 AM.
Old 04-13-2009, 11:42 PM   #2
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Registered: Apr 2009
Posts: 17

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ip_output is not an exported API. Your device driver cannot use it, only functions in EXPORT_SYMBOL() can be used. The rest of the functions are internal to Linux.

For example: ip_queue_xmit can be used by your driver.

Last edited by titan22; 04-13-2009 at 11:43 PM.


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