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Add specific SSL error code for unexpected CIDs

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Currently, the stack silently ignores DTLS frames with an unexpected CID.
However, in a system which performs CID-based demultiplexing before passing
datagrams to the Mbed TLS stack, unexpected CIDs are a sign of something not
working properly, and users might want to know about it.

This commit introduces an SSL error code MBEDTLS_ERR_SSL_UNEXPECTED_CID
which the stack can return in response to an unexpected CID. It will
conditionally be put to use in subsequent commits.
This commit is contained in:
Hanno Becker 2019-05-14 11:02:36 +01:00
parent b9ec44fcf6
commit c37c96a3c5
3 changed files with 5 additions and 2 deletions
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4
include/mbedtls/error.h
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@ -100,8 +100,8 @@
* ECP 4 10 (Started from top)
* MD 5 5
* HKDF 5 1 (Started from top)
* CIPHER 6 8
* SSL 6 23 (Started from top)
* CIPHER 6 8 (Started from 0x6080)
* SSL 6 24 (Started from top, plus 0x6000)
* SSL 7 32
*
* Module dependent error code (5 bits 0x.00.-0x.F8.)