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#### Description <!-- Describe your changes in detail --> Improved URN parsing according to [RFC8141](https://datatracker.ietf.org/doc/html/rfc8141#section-2) that allows an arbitrary number of colons to be present in the URN value. Entire URN NID and NSS parts (except for `urn:` scheme) are stored in the `uri.host` struct field. `rq-components` are not supported.

Example of the parse error when parsing "urn:emergency:service:sos" ``` parse_uri(): bad char ':' in state 3 parsed: urn:emergency:service (21) / urn:emergency:service:sos (25) ```

URN values that have been tested to work: - `urn:emergency:service:sos` - `urn:emergency:responder.fire` - `urn:emergency:media-feature` You can view, comment on, or merge this pull request online at:

https://github.com/kamailio/kamailio/pull/3909

-- Commit Summary --

* core: Improved URN parsing according to RFC8141

-- File Changes --

M src/core/parser/parse_uri.c (48)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/3909.patch https://github.com/kamailio/kamailio/pull/3909.diff