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coaps: x509 - dtls add default values here (1024) and in yml add note

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nick 2024-12-13 12:13:11 +02:00
parent 4cfe7441b1
commit 50e6968170
2 changed files with 23 additions and 3 deletions
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22
application/src/main/resources/thingsboard.yml
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@ -1303,8 +1303,28 @@ coap:
# - A value that are > 4: MultiNodeConnectionIdGenerator is used # - A value that are > 4: MultiNodeConnectionIdGenerator is used
connection_id_length: "${COAP_DTLS_CONNECTION_ID_LENGTH:}" connection_id_length: "${COAP_DTLS_CONNECTION_ID_LENGTH:}"
# Specify the MTU (Maximum Transmission Unit). # Specify the MTU (Maximum Transmission Unit).
# Should be used if LAN MTU is not used, e.g. if IP tunnels are used or if the client uses a smaller value than the LAN MTU.
# Default = 1024
# Minimum value = 64
# If set to 0 - LAN MTU is used.
max_transmission_unit: "${COAP_DTLS_MAX_TRANSMISSION_UNIT:1024}" max_transmission_unit: "${COAP_DTLS_MAX_TRANSMISSION_UNIT:1024}"
# DTLS maximum fragment length (RFC 6066) # DTLS maximum fragment length (RFC 6066, Section 4).
# Default = 1024
# Possible values: 512, 1024, 2048, 4096.
# If set to 0, the default maximum fragment size of 2^14 bytes (16,384 bytes) is used.
# Without this extension, TLS specifies a fixed maximum plaintext fragment length of 2^14 bytes.
# It may be desirable for constrained clients to negotiate a smaller maximum fragment length due to memory limitations or bandwidth limitations.
# In order to negotiate smaller maximum fragment lengths,
# clients MAY include an extension of type "max_fragment_length" in the (extended) client hello.
# The "extension_data" field of this extension SHALL contain:
# enum {
# 2^9(1) == 512,
# 2^10(2) == 1024,
# 2^11(3) == 2048,
# 2^12(4) == 4096,
# (255)
# } MaxFragmentLength;
# TLS already requires clients and servers to support fragmentation of handshake messages.
max_fragment_length: "${COAP_DTLS_MAX_FRAGMENT_LENGTH:1024}" max_fragment_length: "${COAP_DTLS_MAX_FRAGMENT_LENGTH:1024}"
# Server DTLS credentials # Server DTLS credentials
credentials: credentials:

4
common/coap-server/src/main/java/org/thingsboard/server/coapserver/TbCoapDtlsSettings.java
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@ -117,10 +117,10 @@ public class TbCoapDtlsSettings {
configBuilder.set(DTLS_CONNECTION_ID_NODE_ID, null); configBuilder.set(DTLS_CONNECTION_ID_NODE_ID, null);
} }
} }
if (maxTransmissionUnit != null) { if (maxTransmissionUnit > 0) {
configBuilder.set(DTLS_MAX_TRANSMISSION_UNIT, maxTransmissionUnit); configBuilder.set(DTLS_MAX_TRANSMISSION_UNIT, maxTransmissionUnit);
} }
if (maxFragmentLength != null) { if (maxFragmentLength > 0) {
Length length = fromLength(maxFragmentLength); Length length = fromLength(maxFragmentLength);
if (length != null) { if (length != null) {
configBuilder.set(DTLS_MAX_FRAGMENT_LENGTH, length); configBuilder.set(DTLS_MAX_FRAGMENT_LENGTH, length);