Hi Jakub, On 7/7/23 16:17, Jakub Sitnicki wrote:
Linux commit 91d0b78c5177 ("inet: Add IP_LOCAL_PORT_RANGE socket option")
introduced a new socket option available for AF_INET and AF_INET6 sockets.
Option is available starting from Linux 6.3. Document it.
Reviewed-by: Simon Horman <simon.horman@xxxxxxxxxxxx>
Signed-off-by: Jakub Sitnicki <jakub@xxxxxxxxxxxxxx>
---
Resending the man page update now that the feature has been released.
Previous submission can be found at [1].
I'm the author of the feature. We did a technical review of the man page text
together with the code [2].
Thanks! Patch applied. Cheers, Alex
[1]: https://lore.kernel.org/all/20230201123634.284689-1-jakub@xxxxxxxxxxxxxx/ [2]: https://lore.kernel.org/all/20221221-sockopt-port-range-v6-0-be255cc0e51f@xxxxxxxxxxxxxx/ --- man7/ip.7 | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/man7/ip.7 b/man7/ip.7 index 92ecf4b3e..c97a917ff 100644 --- a/man7/ip.7 +++ b/man7/ip.7 @@ -499,6 +499,27 @@ and .B IP_TOS are ignored. .TP +.BR IP_LOCAL_PORT_RANGE " (since Linux 6.3)" +Set or get the per-socket default local port range. This option can be used to +clamp down the global local port range, defined by the +.I ip_local_port_range +.I /proc +interface described below, for a given socket. +.IP +The option takes an +.I uint32_t +value with the high 16 bits set to the upper range bound, and the low 16 bits +set to the lower range bound. Range bounds are inclusive. The 16-bit values +should be in host byte order. +.IP +The lower bound has to be less than the upper bound when both bounds are not +zero. Otherwise, setting the option fails with EINVAL. +.IP +If either bound is outside of the global local port range, or is zero, then that +bound has no effect. +.IP +To reset the setting, pass zero as both the upper and the lower bound. +.TP .BR IP_MSFILTER " (since Linux 2.4.22 / 2.5.68)" This option provides access to the advanced full-state filtering API. Argument is an
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