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Diffstat (limited to 'share/man/man4/udp.4')
| -rw-r--r-- | share/man/man4/udp.4 | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/share/man/man4/udp.4 b/share/man/man4/udp.4 index 178adfe06b9f..b1dbff56154f 100644 --- a/share/man/man4/udp.4 +++ b/share/man/man4/udp.4 @@ -25,7 +25,7 @@ .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" -.Dd August 1, 2022 +.Dd January 20, 2025 .Dt UDP 4 .Os .Sh NAME @@ -107,6 +107,19 @@ Only one value is supported for this option: .Tn UDP_ENCAP_ESPINUDP from RFC 3948, defined in .In netinet/udp.h . +.Sh FIB support +UDP sockets are FIB-aware. +They inherit the FIB of the process which created the socket. +By default, a UDP socket bound to an address can receive datagrams originating +from any FIB. +If the +.Va net.inet.udp.bind_all_fibs +tunable is set to 0, all UDP sockets will receive only datagrams originating +from the same FIB as the socket. +In this mode, multiple sockets can be bound to the same address, so long as +each socket belongs to a different FIB, similar to the behavior of the +.Dv SO_REUSEPORT +option. .Sh MIB (sysctl) Variables The .Nm |