Re: How to obtain process ID that created connection or owns one packet

[Mikado <mikado4vn@gmail.com>]

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Pablo Neira Ayuso wrote:
> Mikado wrote:
> 
>>Thanks all! Finally I found the answer in 'struct sk_buff':
>>
>>struct sk_buff ( #include <linux/skbuff.h> )
>>|_struct sock ( #include <net/sock.h> )
>>  |_struct socket ( #include <linux/net.h> )
>>    |_struct file ( #include <linux/fs.h> )
>>      |_struct fown_struct ( #include <linux/fs.h> )
>>        |_int pid
> 
> 
> Yes, but AFAIK you can only use that in the OUTPUT hook, not in the
> INPUT path. If my mind serves well, I remember that Patrick McHardy
> posted some patches to add support for socket filtering some time ago. I
> don't know what is the status of such work.
> 

Oh, I'm wrong. Below is definition of 'struct fown_struct':

struct fown_struct {
	rwlock_t lock;          /* protects pid, uid, euid fields */
	int pid;		/* pid or -pgrp where SIGIO should be sent */
	uid_t uid, euid;	/* uid/euid of process setting the owner */
	void *security;
	int signum;		/* posix.1b rt signal to be delivered on IO */
};

'pid' field is not PID of the process created packet. Is there any way
to catch REAL pid from 'struct sk_buff', 'struct sock', 'struct socket',
'struct file'?

Thanks in advanced!
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