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sasl_server_new - Cyrus SASL documentation


#include <sasl/sasl.h>
int sasl_server_new(const char *service,

const char *serverFQDN,
const char *user_realm,
const char *iplocalport,
const char *ipremoteport,
const sasl_callback_t *callbacks,
unsigned flags,
sasl_conn_t ** pconn);


sasl_server_new() creates a new SASL context. This context will be used for all SASL calls for one connection. It handles both authentication and integrity/encryption layers after authentication.
  • service – is the registered name of the service (usually the protocol name) using SASL (e.g. “imap”).
  • serverFQDN – is the fully qualified server domain name. NULL means use gethostname(). This is useful for multi-homed servers.
  • user_realm – is the domain of the user agent. This is usually not necessary (NULL is default)
  • iplocalport

    is the IP and port of the local side of the connection, or NULL. If iplocalport is NULL it will disable mechanisms that require IP address information. This strings must be in one of the following formats:

  • ”a.b.c.d;port” (IPv4),
  • ”e:f:g:h:i:j:k:l;port” (IPv6), or
  • ”e:f:g:h:i:j:a.b.c.d;port” (IPv6)

  • ipremoteport – is the IP and port of the remote side of the connection, or NULL (see iplocalport)
  • flags – are connection flags (see below)
  • pconn – is a pointer to the connection context allocated by the library. This structure will be used for all future SASL calls for this connection.

Connection flags

Flags that may be passed to sasl_server_new():

  • SASL_SUCCESS_DATA: The protocol supports a server‐last send
authorization id that is not the authentication id.


SASL callback functions should return SASL return codes. See sasl.h for a complete list. SASL_OK indicates success.

Other return codes indicate errors and should either be handled or the authentication session should be quit.


RFC 4422,:saslman:sasl(3), sasl_server_init(3), sasl_server_start(3), sasl_server_step(3), sasl_setprop(3), sasl_errors(3)


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February 18, 2022 2.1.28