* Function to read IP address in dot format
@ 2005-04-11 6:05 linux lover
2005-04-11 14:07 ` Randy.Dunlap
2005-04-11 14:07 ` Arnaldo Carvalho de Melo
0 siblings, 2 replies; 3+ messages in thread
From: linux lover @ 2005-04-11 6:05 UTC (permalink / raw)
To: netdev
Hello,
what is the function to read IP address in
kernel code as human readable dot quad format? IP
address are unsigned int's in ip.h file as
__u32 saddr;
__u32 daddr;
In ip_build_xmit ip header gets IP addresses
from rtable struct as
iph->saddr=rt->rt_src;
iph->daddr=rt->rt_dst;
Now if i want to know to which ip current
packet is being sent i am using printks but it prints
iph->saddr in int format not in user readable format.
how to do that?
regards,
linux_lover
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Function to read IP address in dot format
2005-04-11 6:05 Function to read IP address in dot format linux lover
@ 2005-04-11 14:07 ` Randy.Dunlap
2005-04-11 14:07 ` Arnaldo Carvalho de Melo
1 sibling, 0 replies; 3+ messages in thread
From: Randy.Dunlap @ 2005-04-11 14:07 UTC (permalink / raw)
To: linux lover; +Cc: netdev
On Sun, 10 Apr 2005 23:05:10 -0700 (PDT) linux lover wrote:
|
| Hello,
| what is the function to read IP address in
| kernel code as human readable dot quad format? IP
| address are unsigned int's in ip.h file as
| __u32 saddr;
| __u32 daddr;
| In ip_build_xmit ip header gets IP addresses
| from rtable struct as
| iph->saddr=rt->rt_src;
| iph->daddr=rt->rt_dst;
| Now if i want to know to which ip current
| packet is being sent i am using printks but it prints
| iph->saddr in int format not in user readable format.
| how to do that?
Look at the NIPQUAD() macro in include/linux/kernel.h
and at some example uses of it.
---
~Randy
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Function to read IP address in dot format
2005-04-11 6:05 Function to read IP address in dot format linux lover
2005-04-11 14:07 ` Randy.Dunlap
@ 2005-04-11 14:07 ` Arnaldo Carvalho de Melo
1 sibling, 0 replies; 3+ messages in thread
From: Arnaldo Carvalho de Melo @ 2005-04-11 14:07 UTC (permalink / raw)
To: linux lover; +Cc: netdev
On Apr 11, 2005 3:05 AM, linux lover <linux_lover2004@yahoo•com> wrote:
>
> Hello,
> what is the function to read IP address in
> kernel code as human readable dot quad format? IP
> address are unsigned int's in ip.h file as
> __u32 saddr;
> __u32 daddr;
> In ip_build_xmit ip header gets IP addresses
> from rtable struct as
> iph->saddr=rt->rt_src;
> iph->daddr=rt->rt_dst;
> Now if i want to know to which ip current
> packet is being sent i am using printks but it prints
> iph->saddr in int format not in user readable format.
> how to do that?
> regards,
Use NIPQUAD, as in the example below:
printk(KERN_DEBUG "dccp rx: packet=%s, "
"source=%u.%u.%u.%u@%d, "
"dest=%u.%u.%u.%u@%d\n",
dccp_packet_name(dh->dccph_type),
NIPQUAD(skb->nh.iph->saddr),
ntohs(dh->dccph_sport),
NIPQUAD(skb->nh.iph->daddr),
ntohs(dh->dccph_dport));
- Arnaldo
^ permalink raw reply [flat|nested] 3+ messages in thread
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2005-04-11 14:07 ` Randy.Dunlap
2005-04-11 14:07 ` Arnaldo Carvalho de Melo
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