getting client ip before accept?

Hi
i'm searching for a way to get a client ip before calling accept
(and to close connection if ip doesn't match a list)
any ideas?

cheers,
stephan

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In comp.os.linux.networking Stephan Dreyer <(E-Mail Removed)> suggested:
> Hi
> i'm searching for a way to get a client ip before calling accept
> (and to close connection if ip doesn't match a list)
> any ideas?

man 3 hosts_access
man 5 hosts_access

You need to specify what you want to do, if you need more help.

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Michael Heiming (GPG-Key ID: 0xEDD27B94)
mail: echo (E-Mail Removed) | perl -pe 'y/a-z/n-za-m/'
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> man 3 hosts_access
> man 5 hosts_access
>
> You need to specify what you want to do, if you need more help.

i want to do this in my own c/c++ programs
ip check would only be the first step
for example i could make a connection back and check for a key before
accepting connection

Not going to happen... you would have to get into a TDI filter or some kind
of packet sniffer.

"Stephan Dreyer" <(E-Mail Removed)> wrote in message
news:cj4gmn$5j3$03$(E-Mail Removed)...
> Hi
> i'm searching for a way to get a client ip before calling accept
> (and to close connection if ip doesn't match a list)
> any ideas?
>
> cheers,
> stephan
>
>

"PC" <(E-Mail Removed)> writes:

]Not going to happen... you would have to get into a TDI filter or some kind
]of packet sniffer.

]"Stephan Dreyer" <(E-Mail Removed)> wrote in message
]news:cj4gmn$5j3$03$(E-Mail Removed)...
]> Hi
]> i'm searching for a way to get a client ip before calling accept
]> (and to close connection if ip doesn't match a list)
]> any ideas?

You make no indication here as to what you are using. If it is ppp, then
you can use the fourth entry field in /etc/ppp/{pap,chap}-secrets to limit
the IP of people able to log in. However this would mean that they have to
have their IP.