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Split reusing the addr/port and load-balancing socket options

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The SO_REUSEADDR, SO_REUSEPORT and SO_REUSEPORT_LB has different meaning
on different platform. In this commit, we split the function to set the
reuse of address/port and setting the load-balancing into separate
functions.

The libuv library already have multiplatform support for setting
SO_REUSEADDR and SO_REUSEPORT that allows binding to the same address
and port, but unfortunately, when used after the load-balancing socket
options have been already set, it overrides the previous setting, so we
need our own helper function to enable the SO_REUSEADDR/SO_REUSEPORT
first and then enable the load-balancing socket option.
This commit is contained in:
Ondřej Surý
2020-10-05 13:14:04 +02:00
parent acb6ad9e3c
commit fd975a551d
3 changed files with 53 additions and 23 deletions
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10
lib/isc/netmgr/netmgr-int.h
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@@ -840,9 +840,15 @@ isc__nm_socket_freebind(uv_os_sock_t fd, sa_family_t sa_family);
*/
isc_result_t
isc__nm_socket_reuseport(uv_os_sock_t fd);
isc__nm_socket_reuse(uv_os_sock_t fd);
/*%<
* Set the SO_REUSEPORT (or equivalent) socket option on the fd
* Set the SO_REUSEADDR or SO_REUSEPORT (or equivalent) socket option on the fd
*/
isc_result_t
isc__nm_socket_reuse_lb(uv_os_sock_t fd);
/*%<
* Set the SO_REUSEPORT_LB (or equivalent) socket option on the fd
*/
isc_result_t