The sasl callback for username/authname/realm
#include <sasl/sasl.h> int sasl_getsimple_t(void *context, int id, const char ** result, unsigned * len);
sasl_getsimple_t is used to retrieve simple things from the application. In practice this is authentication name, authorization name, and realm. The id parameter indicates which value is being requested. Possible values include:
SASL_CB_USER - Client user identity to login as SASL_CB_AUTHNAME - Client authentication name SASL_CB_LANGUAGE - Comma-separated list of RFC 1766 languages SASL_CB_CNONCE - Client-nonce (for testing mostly)
SASL callback functions should return SASL return codes. See sasl.h for a complete list. SASL_OK indicates success.
RFC 4422