Support for Linux transparent proxy & asm/types.h

Andi Kleen ak@muc.de
Wed Dec 23 07:09:00 GMT 1998


Hallo,

I'm currently working on up-to-date networking man pages for the Linux
2.1/2.2 stack. I'm considering to document transparent proxies now. They
need a special version of sockaddr_in for the accept/recvmsg for dgram
socket case to pass the real destination address to the user (it is 
simply mapped to the unused bytes of sockaddr_in with a second sockaddr_in). 
Before I document it I would like to have an standard declaration of this 
structure in glibc. Are there any plans to add it?

struct sockaddr_in_proxy { 
	struct sockaddr_in 	pin_proxy;
	struct sockaddr_in	pin_dest; 
}; 

I know that the interface is rather ugly, but unfortunately now we're 
stuck with it :/ 

On a related topic: I currently give this synopsis line for netlink sockets:

#include <linux/netlink.h>
nl_socket = socket(PF_NETLINK, ....); 

To compile that snippet on glibc systems #include <asm/types.h> is needed.
Does glibc gurantee in future version that asm/types.h will continue to
work?


-Andi




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