icmp and raw sockets in python

[Martin P. Hellwig]

On 13/12/2011 16:50, Sagy Drucker wrote:
> hello
Hi
> i am relatively new to python, so please be considerate...
As I am only responding to one of your questions, perhaps it would be 
best if you don't get any other more helpful replies to split your 
questions up and post them separately.
>
> i'm implementing a server and a client via raw_sockets.
> i have the necessary privileges.
>
> now, the server i defined so:
> host = socket.gethostbyname(socket.gethostname())
> address = (host, 22224)
> sockSer = socket.socket(socket.AF_INET, socket.SOCK_RAW,
> socket.IPPROTO_ICMP)
> sockSer.bind(address)
> sockSer.ioctl(socket.SIO_RCVALL, socket.RCVALL_ON)
> packet, addr = sockSer .recvfrom(4096)   # wait for packet from client
>
> Q1) why can't i simply type: hosts = 'localhost'.
> if i do so, it doesn't allow me to write the line:
> sockSer.ioctl(socket.SIO_RCVALL, socket.RCVALL_ON).
> only when doing gethostbyname(socket.gethostname()) i get
> 192.168.1.101
> and then it works.
>
<cut other questions>
Well localhost should resolve to 127.0.0.1/8 which is attached to the 
loopback interface, my gut feeling is that this interface has a 
particular set of restrictions which you are encountering.
Sorry I can't be more helpful.

-- 
mph