On 05/22/2013 04:32 PM, [email protected] wrote:
Currently it is not supported. What we could do here
would be a similar approach as in trafgen if you need
it, where we would pass the source file first to the
C preprocessor doing textual replacements and then to
bpfc. What do you say?
Hi Daniel,
That would be great!
Done, please pull from the repo to get this commit:
commit 4584b955420cd8d2fcae767c86b853fde4bccc6e
Author: Daniel Borkmann <[email protected]>
Date: Thu May 23 11:08:03 2013 +0200
bpfc: allow bpf programs to be passed to cpp
This patch allows bpf programs to be passed to the C preprocessor
before handing over to bpfc. Example:
#define ETH_P_IP 0x800
ldh [12]
jne #ETH_P_IP, drop
ldb [23]
jneq #6, drop
ldh [20]
jset #0x1fff, drop
ldxb 4 * ([14] & 0xf)
ldh [x + 14]
jeq #0x16, pass
ldh [x + 16]
jne #0x16, drop
pass: ret #-1
drop: ret #0
Compile with: bpfc -i foo -p
Suggested-by: John Lange <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
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