My experiments show that with

modparam("nathelper", "ping_nated_only", 1)
modparam("nathelper", "sipping_bflag", FLB_NATSIPPING)
modparam("usrloc", "nat_bflag", FLB_NATB)

when both FLB_NATB and FLB_NATSIPPING branch flags are set, no OPTIONS from Kamailio to UAC is generated, so I assume that nathelper.ping_nated_only=1 does force 4-bytes UDP keepalive.

This change spells the above, as the behaviour currently is not specified.

You can view, comment on, or merge this pull request online at:

https://github.com/kamailio/kamailio/pull/3346

Commit Summary

5b7ea66 nathelper: ping_nated_only sends 4-bytes UDP-packet pings

File Changes

M src/modules/nathelper/doc/nathelper_admin.xml (12)
M src/modules/nathelper/examples/4to6.cfg (2)
M src/modules/nathelper/examples/alg.cfg (2)
M src/modules/nathelper/nathelper.c (6)
M src/modules/nathelper/nhelpr_funcs.c (4)

Patch Links:

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