TCP/IP stack related prob.

TCP/IP stack related prob.

[Alisha Nigam]

hi all,
  i was trying to write a module for printing 
the destination header of packets comming to my
machine.

#include<linux/module.h>
#include<linux/skbuff.h>
#define MODULE
#define __KERNEL__
int init_module(struct sk_buff *skb)
 {printk("Destination Addr:%s.\n",skb->nh.iph->daddr);
         kfree_skb(skb);
            return 0;
}

void cleanup_module(void)
   { printk(" Module is removed succesfully\n");
   }
 then compile it 
  gcc -c -O -W -Wall -Wstrict-prototypes
-Wmissing-prototypes -DMODULE -D__KERNEL__ -mymodule.o
mymodule.c 


   i am getting a bundle of errors ...... 


In file included from /usr/include/linux/fs.h:23,
                 from
/usr/include/linux/capability.h:17,
                 from /usr/include/linux/binfmts.h:5,
                 from /usr/include/linux/sched.h:9,
                 from /usr/include/linux/skbuff.h:19,
                 from p10.c:2:
/usr/include/linux/string.h:8:2: warning: #warning
Using kernel header in userland!
In file included from /usr/include/linux/sched.h:14,
                 from /usr/include/linux/skbuff.h:19,
                 from p10.c:2:
/usr/include/linux/timex.h:173: field `time' has
incomplete type
In file included from /usr/include/linux/bitops.h:69,
                 from /usr/include/asm/system.h:7,
                 from /usr/include/linux/sched.h:16,
                 from /usr/include/linux/skbuff.h:19,
                 from p10.c:2:
/usr/include/asm/bitops.h:333:2: warning: #warning
This includefile is not available on all
architectures.
/usr/include/asm/bitops.h:334:2: warning: #warning
Using kernel headers in userspace. 
In file included from /usr/include/linux/signal.h:4,
                 from /usr/include/linux/sched.h:25,
                 from /usr/include/linux/skbuff.h:19,
                 from p10.c:2:
/usr/include/asm/signal.h:107: parse error before
"sigset_t"
/usr/include/asm/signal.h:110: parse error before '}'
token
In file included from /usr/include/linux/sched.h:81,
                 from /usr/include/linux/skbuff.h:19,
                 from p10.c:2:
/usr/include/linux/timer.h:45: parse error before
"spinlock_t"
/usr/include/linux/timer.h:53: parse error before '}'
token
/usr/include/linux/timer.h:67: parse error before
"tvec_base_t"
/usr/include/linux/timer.h:101: parse error before
"tvec_bases"
/usr/include/linux/timer.h: In function `init_timer':
/usr/include/linux/timer.h:105: dereferencing pointer
to incomplete type
/usr/include/linux/timer.h:105: dereferencing pointer
to incomplete type
/usr/include/linux/timer.h:106: dereferencing pointer
to incomplete type
/usr/include/linux/timer.h: In function
`timer_pending':
/usr/include/linux/timer.h:121: dereferencing pointer
to incomplete type
In file included from /usr/include/linux/highmem.h:5,
                 from /usr/include/linux/skbuff.h:26,
                 from p10.c:2:
/usr/include/asm/pgalloc.h:6:24: asm/fixmap.h: No such
file or directory
In file included from /usr/include/linux/highmem.h:5,
                 from /usr/include/linux/skbuff.h:26,
                 from p10.c:2:
/usr/include/asm/pgalloc.h: At top level:
/usr/include/asm/pgalloc.h:57: parse error before '*'
token
/usr/include/asm/pgalloc.h: In function
`get_pgd_slow':
/usr/include/asm/pgalloc.h:59: `pgd_t' undeclared
(first use in this function)
/usr/include/asm/pgalloc.h:59: (Each undeclared
identifier is reported only once
/usr/include/asm/pgalloc.h:59: for each function it
appears in.)
/usr/include/asm/pgalloc.h:59: `pgd' undeclared (first
use in this function)
/usr/include/asm/pgalloc.h:59: parse error before ')'
token
/usr/include/asm/pgalloc.h:62: `USER_PTRS_PER_PGD'
undeclared (first use in this function)
/usr/include/asm/pgalloc.h:63: `swapper_pg_dir'
undeclared (first use in this function)
/usr/include/asm/pgalloc.h:63: `PTRS_PER_PGD'
undeclared (first use in this function)
/usr/include/asm/pgalloc.h: At top level:
/usr/include/asm/pgalloc.h:70: parse error before '*'
token
/usr/include/asm/pgalloc.h: In function
`get_pgd_fast':
/usr/include/asm/pgalloc.h:80: `pgd_t' undeclared
(first use in this function)
/usr/include/asm/pgalloc.h:80: parse error before ')'
token
/usr/include/asm/pgalloc.h: At top level:
/usr/include/asm/pgalloc.h:83: parse error before '*'
token
/usr/include/asm/pgalloc.h: In function
`free_pgd_fast':
/usr/include/asm/pgalloc.h:85: `pgd' undeclared (first
use in this function)
/usr/include/asm/pgalloc.h: At top level:
/usr/include/asm/pgalloc.h:90: parse error before '*'
token
/usr/include/asm/pgalloc.h: In function
`free_pgd_slow':
/usr/include/asm/pgalloc.h:99: `pgd' undeclared (first
use in this function)
/usr/include/asm/pgalloc.h: At top level:
/usr/include/asm/pgalloc.h:103: parse error before '*'
token
/usr/include/asm/pgalloc.h: In function
`pte_alloc_one':
/usr/include/asm/pgalloc.h:105: `pte_t' undeclared
(first use in this function)
/usr/include/asm/pgalloc.h:105: `pte' undeclared
(first use in this function)
/usr/include/asm/pgalloc.h:109: parse error before ')'
token
/usr/include/asm/pgalloc.h: At top level:
/usr/include/asm/pgalloc.h:118: parse error before '*'
token
/usr/include/asm/pgalloc.h: In function
`pte_alloc_one_fast':
/usr/include/asm/pgalloc.h:127: `pte_t' undeclared
(first use in this function)
/usr/include/asm/pgalloc.h:127: parse error before ')'
token
/usr/include/asm/pgalloc.h: At top level:
/usr/include/asm/pgalloc.h:130: parse error before '*'
token
/usr/include/asm/pgalloc.h: In function
`pte_free_fast':
/usr/include/asm/pgalloc.h:132: `pte' undeclared
(first use in this function)
/usr/include/asm/pgalloc.h: At top level:
/usr/include/asm/pgalloc.h:137: parse error before '*'
token
/usr/include/asm/pgalloc.h: In function
`pte_free_slow':
/usr/include/asm/pgalloc.h:139: `pte' undeclared
(first use in this function)
/usr/include/asm/pgalloc.h: In function
`flush_tlb_mm':
/usr/include/asm/pgalloc.h:183: `current' undeclared
(first use in this function)
/usr/include/asm/pgalloc.h: In function
`flush_tlb_page':
/usr/include/asm/pgalloc.h:190: dereferencing pointer
to incomplete type
/usr/include/asm/pgalloc.h:190: `current' undeclared
(first use in this function)
/usr/include/asm/pgalloc.h: In function
`flush_tlb_range':
/usr/include/asm/pgalloc.h:197: `current' undeclared
(first use in this function)
In file included from p10.c:2:
/usr/include/linux/skbuff.h: At top level:
/usr/include/linux/skbuff.h:100: parse error before
"spinlock_t"
/usr/include/linux/skbuff.h:120: parse error before
"atomic_t"
/usr/include/linux/skbuff.h:124: parse error before
'}' token
/usr/include/linux/skbuff.h:183: parse error before
"atomic_t"
/usr/include/linux/skbuff.h:215: parse error before
'}' token
p10.c:3:1: warning: "MODULE" redefined
p10.c:1:1: warning: this is the location of the
previous definition
p10.c:4:1: warning: "__KERNEL__" redefined
p10.c:1:1: warning: this is the location of the
previous definition
p10.c:7: warning: no previous prototype for
`init_module'
p10.c: In function `init_module':
p10.c:7: warning: implicit declaration of function
`printk'
p10.c:7: dereferencing pointer to incomplete type
p10.c:8: warning: implicit declaration of function
`kfree_skb'
p10.c: At top level:
p10.c:12: warning: no previous prototype for
`cleanup_module'
/usr/include/linux/prefetch.h: In function `prefetch':
/usr/include/linux/prefetch.h:43: warning: unused
parameter `x'
/usr/include/linux/prefetch.h: In function
`prefetchw':
/usr/include/linux/prefetch.h:48: warning: unused
parameter `x'
/usr/include/asm/pgalloc.h: In function
`flush_tlb_range':
/usr/include/asm/pgalloc.h:195: warning: unused
parameter `start'
/usr/include/asm/pgalloc.h:195: warning: unused
parameter `end'
/usr/include/asm/pgalloc.h: In function
`flush_tlb_pgtables':
/usr/include/asm/pgalloc.h:233: warning: unused
parameter `mm'
/usr/include/asm/pgalloc.h:234: warning: unused
parameter `start'
/usr/include/asm/pgalloc.h:234: warning: unused
parameter `end'



  CAN ANY ONE HELP ME ???????????

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Re: TCP/IP stack related prob.

[Arjan van de Ven]

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On Fri, 2003-04-11 at 09:38, Alisha Nigam wrote:

>  then compile it 
>   gcc -c -O -W -Wall -Wstrict-prototypes
> -Wmissing-prototypes -DMODULE -D__KERNEL__ -mymodule.o
> mymodule.c 
> 
> 
>    i am getting a bundle of errors ...... 
> 
> 
> In file included from /usr/include/linux/fs.h:23,
>                  from
> /usr/include/linux/capability.h:17,
>                  from /usr/include/linux/binfmts.h:5,
>                  from /usr/include/linux/sched.h:9,
>                  from /usr/include/linux/skbuff.h:19,
>                  from p10.c:2:
> /usr/include/linux/string.h:8:2: warning: #warning
> Using kernel header in userland!

you are using glibc headers to compile a kernel.... that's not going to
work. Add -I/lib/modules/`uname -r`/build/include to the gcc commandline
to use the headers of the currently running kernel..


[-- Attachment #2: This is a digitally signed message part --]
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Re: TCP/IP stack related prob.

[Alisha Nigam]

hi 
   thanks a lot it compiled. but while inserting
module
with insmod i am getting errors..
   
   mymodule.o was compiler for kernel version 2.4.9-9
while this kernel is version 2.4.18-14.
 
     i am running RedHat-8.0  and  i compile it
including the headers of current running kernel as
mentioned by you only. 
   
   WHAT COULD BE THE PROBLEM ??????

--- Arjan van de Ven <arjanv@redhat.com> wrote:
> On Fri, 2003-04-11 at 09:38, Alisha Nigam wrote:
> 
> >  then compile it 
> >   gcc -c -O -W -Wall -Wstrict-prototypes
> > -Wmissing-prototypes -DMODULE -D__KERNEL__
> -mymodule.o
> > mymodule.c 
> > 
> > 
> >    i am getting a bundle of errors ...... 
> > 
> > 
> > In file included from /usr/include/linux/fs.h:23,
> >                  from
> > /usr/include/linux/capability.h:17,
> >                  from
> /usr/include/linux/binfmts.h:5,
> >                  from
> /usr/include/linux/sched.h:9,
> >                  from
> /usr/include/linux/skbuff.h:19,
> >                  from p10.c:2:
> > /usr/include/linux/string.h:8:2: warning: #warning
> > Using kernel header in userland!
> 
> you are using glibc headers to compile a kernel....
> that's not going to
> work. Add -I/lib/modules/`uname -r`/build/include to
> the gcc commandline
> to use the headers of the currently running kernel..
> 
> 

> ATTACHMENT part 2 application/pgp-signature
name=signature.asc



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Re: TCP/IP stack related prob.

[Francis Galiegue]

On Friday 11 April 2003 09:52, Arjan van de Ven wrote:
> On Fri, 2003-04-11 at 09:38, Alisha Nigam wrote:
> >  then compile it
> >   gcc -c -O -W -Wall -Wstrict-prototypes
> > -Wmissing-prototypes -DMODULE -D__KERNEL__ -mymodule.o
> > mymodule.c
> >
> >
> >    i am getting a bundle of errors ......
> >
> >
> > In file included from /usr/include/linux/fs.h:23,
> >                  from
> > /usr/include/linux/capability.h:17,
> >                  from /usr/include/linux/binfmts.h:5,
> >                  from /usr/include/linux/sched.h:9,
> >                  from /usr/include/linux/skbuff.h:19,
> >                  from p10.c:2:
> > /usr/include/linux/string.h:8:2: warning: #warning
> > Using kernel header in userland!
>
> you are using glibc headers to compile a kernel.... that's not going to
> work. Add -I/lib/modules/`uname -r`/build/include to the gcc commandline
> to use the headers of the currently running kernel..

Not only that but aren't modules supposed to be compiled with -O2?

-- 
Francis Galiegue <fgaliegue@tbs-internet.com>
"98% of DNS Queries at the Root Level are Unnecessary" - Slashdot headline
"Scientists at the Vatican Praying Center found that 98% of the prayer queries
at the God level are unnecessary." - Anonymous Coward

Re: TCP/IP stack related prob.

[Alisha Nigam]

   
   its not working againg giving a bundle of errors 
so any suggession ????????????????

p10.c:1:1: warning: "MODULE" redefined
p10.c:1:1: warning: this is the location of the
previous definition
p10.c:2:1: warning: "__KERNEL__" redefined
p10.c:1:1: warning: this is the location of the
previous definition
In file included from
/lib/modules/2.4.18-14/build/include/linux/prefetch.h:13,
                 from
/lib/modules/2.4.18-14/build/include/linux/list.h:6,
                 from
/lib/modules/2.4.18-14/build/include/linux/module.h:12,
                 from p10.c:3:
/lib/modules/2.4.18-14/build/include/asm/processor.h:490:
warning: no previous prototype for `prefetch'
In file included from
/lib/modules/2.4.18-14/build/include/asm/system.h:8,
                 from
/lib/modules/2.4.18-14/build/include/asm/semaphore.h:39,
                 from
/lib/modules/2.4.18-14/build/include/linux/fs.h:200,
                 from
/lib/modules/2.4.18-14/build/include/linux/capability.h:17,
                 from
/lib/modules/2.4.18-14/build/include/linux/binfmts.h:5,
                 from
/lib/modules/2.4.18-14/build/include/linux/sched.h:9,
                 from
/lib/modules/2.4.18-14/build/include/linux/skbuff.h:19,
                 from p10.c:4:
/lib/modules/2.4.18-14/build/include/linux/bitops.h:45:
warning: no previous prototype for `generic_fls'
/lib/modules/2.4.18-14/build/include/linux/bitops.h:74:
warning: no previous prototype for `get_bitmask_order'
In file included from
/lib/modules/2.4.18-14/build/include/linux/fs.h:201,
                 from
/lib/modules/2.4.18-14/build/include/linux/capability.h:17,
                 from
/lib/modules/2.4.18-14/build/include/linux/binfmts.h:5,
                 from
/lib/modules/2.4.18-14/build/include/linux/sched.h:9,
                 from
/lib/modules/2.4.18-14/build/include/linux/skbuff.h:19,
                 from p10.c:4:
/lib/modules/2.4.18-14/build/include/asm/byteorder.h:14:
warning: type qualifiers ignored on function return
type
/lib/modules/2.4.18-14/build/include/asm/byteorder.h:28:
warning: type qualifiers ignored on function return
type
In file included from
/lib/modules/2.4.18-14/build/include/linux/byteorder/little_endian.h:11,
                 from
/lib/modules/2.4.18-14/build/include/asm/byteorder.h:45,
                 from
/lib/modules/2.4.18-14/build/include/linux/fs.h:201,
                 from
/lib/modules/2.4.18-14/build/include/linux/capability.h:17,
                 from
/lib/modules/2.4.18-14/build/include/linux/binfmts.h:5,
                 from
/lib/modules/2.4.18-14/build/include/linux/sched.h:9,
                 from
/lib/modules/2.4.18-14/build/include/linux/skbuff.h:19,
                 from p10.c:4:
/lib/modules/2.4.18-14/build/include/linux/byteorder/swab.h:132:
warning: type qualifiers ignored on function return
type
/lib/modules/2.4.18-14/build/include/linux/byteorder/swab.h:145:
warning: type qualifiers ignored on function return
type
/lib/modules/2.4.18-14/build/include/linux/byteorder/swab.h:159:
warning: type qualifiers ignored on function return
type
In file included from
/lib/modules/2.4.18-14/build/include/linux/fs.h:375,
                 from
/lib/modules/2.4.18-14/build/include/linux/capability.h:17,
                 from
/lib/modules/2.4.18-14/build/include/linux/binfmts.h:5,
                 from
/lib/modules/2.4.18-14/build/include/linux/sched.h:9,
                 from
/lib/modules/2.4.18-14/build/include/linux/skbuff.h:19,
                 from p10.c:4:
/lib/modules/2.4.18-14/build/include/linux/quota.h:176:
warning: no previous prototype for `mark_info_dirty'
In file included from
/lib/modules/2.4.18-14/build/include/linux/sched.h:26,
                 from
/lib/modules/2.4.18-14/build/include/linux/skbuff.h:19,
                 from p10.c:4:
/lib/modules/2.4.18-14/build/include/linux/signal.h:
In function `sigorsets':
/lib/modules/2.4.18-14/build/include/linux/signal.h:108:
warning: comparison of unsigned expression < 0 is
always false
/lib/modules/2.4.18-14/build/include/linux/signal.h:
In function `sigandsets':
/lib/modules/2.4.18-14/build/include/linux/signal.h:111:
warning: comparison of unsigned expression < 0 is
always false
/lib/modules/2.4.18-14/build/include/linux/signal.h:
In function `signandsets':
/lib/modules/2.4.18-14/build/include/linux/signal.h:114:
warning: comparison of unsigned expression < 0 is
always false
/lib/modules/2.4.18-14/build/include/linux/signal.h:
In function `signotset':
/lib/modules/2.4.18-14/build/include/linux/signal.h:140:
warning: comparison of unsigned expression < 0 is
always false
In file included from p10.c:4:
/lib/modules/2.4.18-14/build/include/linux/skbuff.h:
In function `__pskb_pull':
/lib/modules/2.4.18-14/build/include/linux/skbuff.h:855:
warning: comparison between signed and unsigned
/lib/modules/2.4.18-14/build/include/linux/skbuff.h:
In function `pskb_may_pull':
/lib/modules/2.4.18-14/build/include/linux/skbuff.h:871:
warning: comparison between signed and unsigned
p10.c: At top level:
p10.c:7: warning: no previous prototype for
`init_module'
p10.c: In function `init_module':
p10.c:7: dereferencing pointer to incomplete type
p10.c: At top level:
p10.c:12: warning: no previous prototype for
`cleanup_module'
/lib/modules/2.4.18-14/build/include/linux/prefetch.h:
In function `prefetchw':
/lib/modules/2.4.18-14/build/include/linux/prefetch.h:48:
warning: unused parameter `x'
/lib/modules/2.4.18-14/build/include/linux/wait.h: In
function `__remove_wait_queue':
/lib/modules/2.4.18-14/build/include/linux/wait.h:225:
warning: unused parameter `head'
/lib/modules/2.4.18-14/build/include/linux/pm.h: In
function `pm_access':
/lib/modules/2.4.18-14/build/include/linux/pm.h:150:
warning: unused parameter `dev'
/lib/modules/2.4.18-14/build/include/linux/pm.h: In
function `pm_dev_idle':
/lib/modules/2.4.18-14/build/include/linux/pm.h:151:
warning: unused parameter `dev'
/lib/modules/2.4.18-14/build/include/asm/pgtable-2level.h:
In function `pgd_none':
/lib/modules/2.4.18-14/build/include/asm/pgtable-2level.h:32:
warning: unused parameter `pgd'
/lib/modules/2.4.18-14/build/include/asm/pgtable-2level.h:
In function `pgd_bad':
/lib/modules/2.4.18-14/build/include/asm/pgtable-2level.h:33:
warning: unused parameter `pgd'
/lib/modules/2.4.18-14/build/include/asm/pgtable-2level.h:
In function `pgd_present':
/lib/modules/2.4.18-14/build/include/asm/pgtable-2level.h:34:
warning: unused parameter `pgd'
/lib/modules/2.4.18-14/build/include/asm/pgtable-2level.h:
In function `pmd_offset':
/lib/modules/2.4.18-14/build/include/asm/pgtable-2level.h:55:
warning: unused parameter `address'
/lib/modules/2.4.18-14/build/include/linux/mm.h: In
function `arch_validate':
/lib/modules/2.4.18-14/build/include/linux/mm.h:491:
warning: unused parameter `gfp_mask'
/lib/modules/2.4.18-14/build/include/linux/mm.h:491:
warning: unused parameter `order'
/lib/modules/2.4.18-14/build/include/asm/pgalloc.h: In
function `pte_alloc_one':
/lib/modules/2.4.18-14/build/include/asm/pgalloc.h:107:
warning: unused parameter `mm'
/lib/modules/2.4.18-14/build/include/asm/pgalloc.h:107:
warning: unused parameter `address'
/lib/modules/2.4.18-14/build/include/asm/pgalloc.h: In
function `pte_alloc_one_fast':
/lib/modules/2.4.18-14/build/include/asm/pgalloc.h:122:
warning: unused parameter `mm'
/lib/modules/2.4.18-14/build/include/asm/pgalloc.h:123:
warning: unused parameter `address'
/lib/modules/2.4.18-14/build/include/asm/pgalloc.h: In
function `flush_tlb_range':
/lib/modules/2.4.18-14/build/include/asm/pgalloc.h:220:
warning: unused parameter `start'
/lib/modules/2.4.18-14/build/include/asm/pgalloc.h:220:
warning: unused parameter `end'
/lib/modules/2.4.18-14/build/include/asm/pgalloc.h: In
function `flush_tlb_pgtables':
/lib/modules/2.4.18-14/build/include/asm/pgalloc.h:238:
warning: unused parameter `start'
/lib/modules/2.4.18-14/build/include/asm/pgalloc.h:238:
warning: unused parameter `end'
/lib/modules/2.4.18-14/build/include/linux/highmem.h:
In function `clear_user_highpage':
/lib/modules/2.4.18-14/build/include/linux/highmem.h:83:
warning: unused parameter `vaddr'
/lib/modules/2.4.18-14/build/include/linux/highmem.h:
In function `copy_user_highpage':
/lib/modules/2.4.18-14/build/include/linux/highmem.h:112:
warning: unused parameter `vaddr'
/lib/modules/2.4.18-14/build/include/linux/skbuff.h:
In function `kunmap_skb_frag':
/lib/modules/2.4.18-14/build/include/linux/skbuff.h:1104:
warning: unused parameter `vaddr'




--- Arjan van de Ven <arjanv@redhat.com> wrote:
> On Fri, 2003-04-11 at 09:38, Alisha Nigam wrote:
> 
> >  then compile it 
> >   gcc -c -O -W -Wall -Wstrict-prototypes
> > -Wmissing-prototypes -DMODULE -D__KERNEL__
> -mymodule.o
> > mymodule.c 
> > 
> > 
> >    i am getting a bundle of errors ...... 
> > 
> > 
> > In file included from /usr/include/linux/fs.h:23,
> >                  from
> > /usr/include/linux/capability.h:17,
> >                  from
> /usr/include/linux/binfmts.h:5,
> >                  from
> /usr/include/linux/sched.h:9,
> >                  from
> /usr/include/linux/skbuff.h:19,
> >                  from p10.c:2:
> > /usr/include/linux/string.h:8:2: warning: #warning
> > Using kernel header in userland!
> 
> you are using glibc headers to compile a kernel....
> that's not going to
> work. Add -I/lib/modules/`uname -r`/build/include to
> the gcc commandline
> to use the headers of the currently running kernel..
> 
> 

> ATTACHMENT part 2 application/pgp-signature
name=signature.asc



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