Hello all,
I have read that helpers in conntrack would give us the opportunity to pars the packets up to application layer. I want to pars the SIP packet, so I decided to use the SIP conntrack helper;which is nf_conntrack_sip. Unlike the functionality the helper itself gives, I want to find the SIP messages of type MESSAGE and read the request line of the packet. SO I add the following code into the line 256.
char sub[mlen+1];
memcpy(sub,&limit[0],
mlen))
sub[mlen]='\0';
printk(KERN_ALERT
"method is:[%s]", sub);
But the problem is, nothing is being printed. My question is, Can I use nf_conntrack_sip for my purpose? and if yes, what is wrong with my code?
Thanks in advance.
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