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- * Network protocol of pdb server and sip-router module *
- The pdb server daemon listen only for UDP messages. The requests contains in
- the UDP payload the number starting with an international prefix, e.g. '49' for
- germany. It must contain only numbers like this: '49721913742734'.
- The answer packet contains then the number string from the respective request,
- null-terminated and followed by two bytes which represents the result. This
- two bytes are interpreted as 16 bit signed integer value, the UDP payload is
- in network byte order (most significant byte first).
- Possible values for the search request:
- * 0: the number could not be found
- * 1-999 the number was found and the result represents its carrier ID
- * 1000: the number could be found, but it is owned from a carrier which is
- not interesting for us and belongs to the "other carrier" group
- From PDB_VERSION_1 onwards the pdb request and reply looks like this:
- +-------+----+----+------+--+-------+
- | header | body |
- +-------+----+----+------+--+-------+
- |version|type|code|length|id|payload|
- +-------+----+----+------+--+-------+
- Version
- Current version is 1 (0x01).
- Type
- PDB_TYPE_REQUEST_ID = 0, /* request pdb type */
- PDB_TYPE_REPLY_ID, /* reply pdb type */
- Code
- PDB_CODE_DEFAULT = 0, /* for request */
- PDB_CODE_OK, /* for response - OK */
- PDB_CODE_NOT_NUMBER, /* for response - letters found in the number */
- PDB_CODE_NOT_FOUND, /* for response - no pdb_id found for the number */
- Length
- The length of the whole message
- Id
- A pdb_msg id which might be used for asynchronous queries.
- Payload
- Request number including '\0' for request.
- Request number including '\0' and pdb_id for reply.
- Backwards compatibility with the old msg protocol is kept when the first byte
- received is different from the known versions ('0x01' for now)
- For more info about the data structures used, see common.h file.
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