"Problem in registering new netfilter target module"

Post #88811 by Rakesh Ranjan on Wednesday 9th of November 2005 12:43:21 AM

Problem in registering new netfilter target module

Friends I'm facing a big problem trying to extend the netfilter. Somone please help me with your quick reply (any hint) as I've to meet a deadline.

My problem is that I've written a new netfilter target module and its corresponding userspace program for iptables to change the packet type of a packet. I compiled the iptables and kernel without any error and installed this new kernel (with newly compiled parameters) in my boot partition.

Next when I booted into this kernel and tried using this target it gives error "invalid argument" which I think is coming because the target module is not geting loaded (as on failure it returns EINVAL).

Now can anyone tell me what may b the problem.
I think I can summarise my problem as what can b pozbl. reasons for which any kernel module not get registered.
 
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qmail-queue(8)						      System Manager's Manual						    qmail-queue(8)

NAME
qmail-queue - queue a mail message for delivery SYNOPSIS
qmail-queue DESCRIPTION
qmail-queue reads a mail message from descriptor 0. It then reads envelope information from descriptor 1. It places the message into the outgoing queue for future delivery by qmail-send. The envelope information is an envelope sender address followed by a list of envelope recipient addresses. The sender address is preceded by the letter F and terminated by a 0 byte. Each recipient address is preceded by the letter T and terminated by a 0 byte. The list of recipient addresses is terminated by an extra 0 byte. If qmail-queue sees end-of-file before the extra 0 byte, it aborts without placing the message into the queue. Every envelope recipient address should contain a username, an @ sign, and a fully qualified domain name. qmail-queue always adds a Received line to the top of the message. Other than this, qmail-queue does not inspect the message and does not enforce any restrictions on its contents. However, the recipients probably expect to see a proper header, as described in qmail-header(5). Programs included with qmail which invoke qmail-queue will invoke the contents of $QMAILQUEUE instead, if that environment variable is set. FILESYSTEM RESTRICTIONS
qmail-queue imposes two constraints on the queue structure: each mess subdirectory must be in the same filesystem as the pid directory; and each todo subdirectory must be in the same filesystem as the intd directory. EXIT CODES
qmail-queue does not print diagnostics. It exits 0 if it has successfully queued the message. It exits between 1 and 99 if it has failed to queue the message. All qmail-queue error codes between 11 and 40 indicate permanent errors: 11 Address too long. 31 Mail server permanently refuses to send the message to any recipients. (Not used by qmail-queue, but can be used by programs offering the same interface.) All other qmail-queue error codes indicate temporary errors: 51 Out of memory. 52 Timeout. 53 Write error; e.g., disk full. 54 Unable to read the message or envelope. 55 Unable to read a configuration file. (Not used by qmail-queue.) 56 Problem making a network connection from this host. (Not used by qmail-queue.) 61 Problem with the qmail home directory. 62 Problem with the queue directory. 63 Problem with queue/pid. 64 Problem with queue/mess. 65 Problem with queue/intd. 66 Problem with queue/todo. 71 Mail server temporarily refuses to send the message to any recipients. (Not used by qmail-queue.) 72 Connection to mail server timed out. (Not used by qmail-queue.) 73 Connection to mail server rejected. (Not used by qmail-queue.) 74 Connection to mail server succeeded, but communication failed. (Not used by qmail-queue.) 81 Internal bug; e.g., segmentation fault. 91 Envelope format error. SEE ALSO
addresses(5), envelopes(5), qmail-header(5), qmail-inject(8), qmail-qmqpc(8), qmail-send(8), qmail-smtpd(8) qmail-queue(8)

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