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SubjectRe: [net-next PATCH v5 0/3] net: reserve ports for applications using fixed port numbers
Octavian Purdila wrote:
> On Saturday 20 February 2010 10:11:40 you wrote:
>
>> 2) I hope you could add some documentation to show the relations
>> between ip_local_port_range and ip_local_reserved_ports.
>>
>
> How does this sound:
>
> ip_local_reserved_ports - list of comma separated ranges
> Specify the ports which are reserved for known third-party
> applications. These ports will not be used by automatic port
> assignments (e.g. when calling connect() or bind() with port
> number 0). Explicit port allocation behavior is unchanged.
>
> The format used for both input and output is a comma separated
> list of ranges (e.g. "1,2-4,10-10" for ports 1, 2, 3, 4 and
> 10). Writing to the file will clear all previously reserved
> ports and update the current list with the one given in the
> input.
>
> Note that ip_local_port_range and ip_local_port_range settings
> are independent and both are considered by the kernel when
> determining which ports are available for automatic port
> assignments.
>
> You can reserve ports which are not in the current
> ip_local_port_range, e.g.:
>
> $ cat /proc/sys/net/ipv4/ip_local_port_range
> 32000 61000
> $ cat /proc/sys/net/ipv4/ip_local_reserved_ports
> 8080,9148
>
> although this is redundant. However such a setting is useful
> if later the port range is changed to a value that will
> include the reserved ports.

This looks fine for me.

Thanks.



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