Configure default DNS resolver in 6lbr example #21117
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For convenience, it would be nice to have DNS resolution enabled by default in the examples. Hence, this patch configures a default DNS resolver on the 6lbr example and propagates its via RDNSS option in RAs to the nodes.
mguetschow
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miri64
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Jan 28, 2025
examples/gnrc_border_router/Makefile
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| @@ -39,8 +39,9 @@ USEMODULE += ps | |||
| # Optionally include DNS support. This includes resolution of names at an | |||
| # upstream DNS server and the handling of RDNSS options in Router Advertisements | |||
| # to auto-configure that upstream DNS server. | |||
| #USEMODULE += sock_dns # include DNS client | |||
| #USEMODULE += gnrc_ipv6_nib_dns # include RDNSS option handling | |||
| USEMODULE += sock_dns # include DNS client | |||
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| USEMODULE += sock_dns # include DNS client | |
| USEMODULE += dns_cache # cache DNS responses | |
| USEMODULE += sock_dns # include DNS client |
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Also, I think here too some ENABLE_DNS ?= 1 switch or something of the like would be helpful, in case e.g. you don't want the border router include RDNSS options in its RAs (e.g. to prevent RA fragmentation).
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I tried to address both comments in my latest commit.
Introduces two Makefile switches for enabling DNS resolution and caching.
miri64
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Jan 28, 2025
miri64
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Type: enhancement
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Contribution description
For convenience, it would be nice to have DNS resolution enabled by default in the examples. Hence, this patch configures a default DNS resolver on the 6lbr example and propagates its via RDNSS option in RAs to the nodes.
Once again the tradeoff is some increased ROM and RAM usage.
Testing procedure
BOARD=nrf52840dongle make -C examples/gnrc_border_router clean all flash ULINK=cdc-ecm.gnrc_networkingwhile enablingUSEMODULE += sock_dnsandUSEMODULE += gnrc_ipv6_nib_dns.ping riot-os.org.Issues/PRs references
Can be tested with #21116.