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Configure default DNS resolver in 6lbr example #21117

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merged 2 commits into from
Jan 28, 2025
Merged

Configure default DNS resolver in 6lbr example #21117

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e668ac4
examples/gnrc_border_router: set DNS resolver
OlegHahm Jan 2, 2025
115b8d9
examples/gnrc_border_router: add DNS option
OlegHahm Jan 28, 2025
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18 changes: 16 additions & 2 deletions examples/gnrc_border_router/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,14 @@ RIOTBASE ?= $(CURDIR)/../..
# Default to using ethos for providing the uplink when not on native
UPLINK ?= ethos

# If enabled will configure a default DNS resolver and propagate it via the
# RDNSS option to the hosts
ENABLE_DNS ?= 1
# If the above setting is active this setting will also enable DNS caching,
# consequently dedicating some more memory space in order to reduce DNS
# requests
ENABLE_DNS_CACHING ?= 1

# Check if the selected Uplink is valid
ifeq (,$(filter ethos slip cdc-ecm wifi ethernet,$(UPLINK)))
$(error Supported uplinks are `ethos`, `slip`, `cdc-ecm`, `ethernet` and `wifi`)
Expand Down Expand Up @@ -39,8 +47,14 @@ USEMODULE += ps
# Optionally include DNS support. This includes resolution of names at an
# upstream DNS server and the handling of RDNSS options in Router Advertisements
# to auto-configure that upstream DNS server.
#USEMODULE += sock_dns # include DNS client
#USEMODULE += gnrc_ipv6_nib_dns # include RDNSS option handling
ifneq (0,$(ENABLE_DNS))
USEMODULE += sock_dns # include DNS client
USEMODULE += gnrc_ipv6_nib_dns # include RDNSS option handling
USEMODULE += auto_init_sock_dns # configure default DNS resolver
ifneq (0,$(ENABLE_DNS_CACHING))
USEMODULE += dns_cache # cache DNS responses
endif
endif

# When using a regular network uplink we should use DHCPv6
ifneq (,$(filter cdc-ecm wifi ethernet,$(UPLINK))$(REUSE_TAP))
Expand Down