diff options
Diffstat (limited to 'include/extension.h')
| -rw-r--r-- | include/extension.h | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/include/extension.h b/include/extension.h index 45637d9518..f9757c1510 100644 --- a/include/extension.h +++ b/include/extension.h @@ -30,8 +30,9 @@ typedef void (*extension_handler)(void *buffer, * @param buffer Data to be processd by the handler, the same space * is used for data returned by the handler. * @command_size Size of the input data. - * @param size On input - max size of the buffer, on output - actual - * number of data returned by the handler. + * @param size On input - max size of the buffer, on output - actual number of + * data returned by the handler. A single byte return + * usually indicates an error and contains the error code. */ void extension_route_command(uint16_t command_code, void *buffer, @@ -43,9 +44,21 @@ struct extension_command { extension_handler handler; } __packed; -/* Values for different extension commands. */ +/* Values for different extension subcommands. */ enum { EXTENSION_AES = 0, + EXTENSION_HASH = 1, +}; + + +/* Error codes reported by extension commands. */ +enum { + /* EXTENSION_HASH error codes */ + /* Attempt to start a session on an active handle. */ + EXC_HASH_DUPLICATED_HANDLE = 1, + EXC_HASH_TOO_MANY_HANDLES = 2, /* No room to allocate a new context. */ + /* Continuation/finish on unknown context. */ + EXC_HASH_UNKNOWN_CONTEXT = 3 }; #define DECLARE_EXTENSION_COMMAND(code, handler) \ |