How to set the socket type and the protocol of a socket using create_connection?

[Guillaume Comte]

Le mercredi 22 août 2012 04:10:43 UTC+2, Dennis Lee Bieber a écrit :
> On Tue, 21 Aug 2012 10:00:28 -0700 (PDT), Guillaume Comte
> 
> <guillaume.comte10 at gmail.com> declaimed the following in
> 
> gmane.comp.python.general:
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> 
> 
> 	A later follow-up
> 
> > Unfortunatly, my_socket.bind((src_addr, 1)) doesn't work. I get the error message: "socket.error: [Errno 49] Can't assign requested address"...
> 
> > 
> 
> 
> 
> 	Since .bind() is used to set up a /listener/, the network stack
> 
> (LINK layer) probably has to be tied to the IP address; that is, a valid
> 
> "source" address needs to be supplied to .bind.
> 
Do you mean that an alias is not a valid source address? Because ping.c can do it...

I've also tried changing the port to 3333 or 8080 but the same error happens.
> 
> 
> 
> 
> > But when I try to set a source address, I still get the same error message...
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> > 
> 
> > Does anyone know how I could build the IP header (I don't even know if it can be the solution but it's worth a try...)?
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> 
> 
> 	Based upon http://linux.die.net/man/7/raw "Raw sockets allow new
> 
> IPv4 protocols to be implemented in user space. A raw socket receives or
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> sends the raw datagram not including link level headers. " implies that
> 
> you need to build the entire IP packet for your ICMP message... That
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> means you do NOT use socket methods to set fields -- you'll probably
> 
> have to use something like the struct module to lay out the entire IP
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> packet /including/ header contents, and then pass that as-is to the
> 
> socket.
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> 
> 
> -- 
> 
> 	Wulfraed                 Dennis Lee Bieber         AF6VN
> 
>         wlfraed at ix.netcom.com    HTTP://wlfraed.home.netcom.com/