[strongSwan] Porting to uclinux no mmu-version
chihweifc at gmail.com
Thu Mar 17 14:30:53 CET 2011
Summary the issues I solved until today.
1. dlopen liked function.
I fake those function, and add some print to capture what
plugin the default charon will load.
Then, I modify the load_plugin function. Let it directly open
the xxx_create_plugin functions by comparing the plugin name. Now, the
plugins can loaded.
2. The EL: not found error while running a binary
This is the issue about file system format. NIOS2 platform
support flt file format. So while compiling strongswan, I added the
Could anyone have the idea that to make IPSEC IKEV2 work success
what modules are needed?
I trace the source code. I found out the ipsec script in sbin/ wake
up the binary starter (ipsec start).
Then the starter will wake up the charom daemon.
Later, ipsec script wake up binary stroke ( ipsec up XXXX)
I guess stroke will control the charon, I haven't traced that.
於 2011/3/10 下午 07:16, ChihWei 提到:
> Hello Martin,
> Thanks for your quick reply.
> I have done the compilnatoin with NIOS2 cross compiler on
> uclinux-no-mmu by switching the sequence of including library in
> However, the strongswan cannot bring up by using the ipsec script.
> It is the poor ability of uclinux shell.
> Yes, you are right. This is not that trivial.
> To make the compile pass, I fake the dlxxxx liked function ex: dlopen,
> dlsym dlclose....
> Because the uclinux-no-mmu kernel doesn't support dynamic link library.
> I add some print message in my fake dlopen funciton.
> The target is capture what library name will include runtime. And I
> change those library from dynamic calling to static. ( Actully I never
> have such that experience........)
> BTW, I also tried the binary directly. (>./starter) But I got the "EL:
> not found" error.
> I even don't know where is this error comes from.............
> I am not that understand how uclinux handle multi-threading.
> The versoin i used supports multi-threading and vfork.
> Could you give me an idea or reference about the working flow and
> interactions of strongswan module? It may help me understand the
> running flow of strongswan.
> 於 2011/3/8 下午 09:36, Martin Willi 提到:
>> Hi Jerome,
>>> I am doing the porting to the uclinux with none mmu.
>>> Is there anyone have previous experience?
>> I've never tried it, and probably it is not that trivial.
>>> However, it got some "undefined reference to xxxx" compile errors.
>> Currently our build system does not support a completely static build.
>> While plugins can be built-in using the --enable-monolithic option,
>> linking our libraries statically does not work. It probably is possible,
>> but would require some work.
>> How does uClinux handle multi-threaded applications? We have at least
>> for charon rather tough requirements to the threading subsystem (should
>> be mostly POSIX compliant).
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