On Friday, 10 July 2020 11:29:08 CEST Maksim Iushchenko wrote:
> batman-adv messages contain TTL value in batman header. So,
> 1. What is default TTL batman-adv uses?

50 [1]

> 2. Is it possible to set my own TTL value for each batman-adv packet?

No

Kind regards,
	Sven

[1] https://git.open-mesh.org/batman-adv.git/blob/921f23df8a26fa49f12f58dd8409f56e2b89e7d5:/net/batman-adv/main.h#l26