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pkg/tinydtls: Set buffer size as required for gcoap

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chrysn 2023-03-02 09:15:51 +01:00
parent e9333feac2
commit 5d741b9d41
1 changed files with 15 additions and 0 deletions
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15
pkg/tinydtls/Makefile
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@ -18,3 +18,18 @@ all:
ifeq (llvm,$(TOOLCHAIN))
CFLAGS += -Wno-format-nonliteral
endif
ifneq (,$(filter gcoap,$(USEMODULE)))
# Configuring the buffer large enough that a full Gcoap packet can be
# encrypted or decrypted.
# This is the default in gcoap.h, which we don't have access to, so it is copied over.
CONFIG_GCOAP_PDU_BUF_SIZE := $(or $(CONFIG_GCOAP_PDU_BUF_SIZE),128)
# If there were another way to set up DTLS_MAX_BUF, we'd need to set the
# maximum of these here.
#
# 29 bytes are the overhead measured with Wireshark on packets exchanged in
# default configuration; adding some to be safe against variable size fields.
CFLAGS += "-DDTLS_MAX_BUF=($(CONFIG_GCOAP_PDU_BUF_SIZE) + 36)"
endif