System i: Programming Secure Sockets APIs - IBM

Error Conditions
When the gsk_attribute_set_callback() API fails with return code [GSK_ERROR_IO], errno can be set to:
[EINTR]
Interrupted function call.
[EDEADLK]
Resource deadlock avoided.
[ETERM]
Operation terminated.
If an errno is returned that is not in this list, look in “Errno Values for UNIX-Type Functions” on page 103
for a description of the errno.
Usage Notes
1. The following GSK_CALLBACK_ID values may be set in the SSL environment after
gsk_environment_open() and before gsk_environment_init(). They are used as defaults for
subsequent secure sessions:
v GSK_ENVIRONMENT_CLOSE_CALLBACK
v GSK_CERT_VALIDATION_CALLBACK
2. The following GSK_CALLBACK_ID values currently are not supported in the i5/OS ®
implementation:
v GSK_IO_CALLBACK
v GSK_SID_CACHE_CALLBACK
v GSK_CLIENT_CERT_CALLBACK
v GSK_PKCS11_CALLBACK
Related Information
v “gsk_attribute_set_enum()—Set enumerated information for a secure session or an SSL environment”
on page 24—Set enumerated information for a secure session or an SSL environment.
v “gsk_attribute_set_buffer()—Set character information for a secure session or an SSL environment” on
page 16—Set character string information for a secure session or an SSL environment.
v “gsk_attribute_set_numeric_value()—Set numeric information for a secure session or an SSL
environment” on page 28—Set numeric information for a secure session or an SSL environment
v “gsk_environment_init()—Initialize an SSL environment” on page 32—Initialize an SSL environment
v “gsk_environment_open()—Get a handle for an SSL environment” on page 34—Get a handle for an
SSL environment
v “gsk_secure_soc_init()—Negotiate a secure session” on page 38—Negotiate a secure session
v “gsk_secure_soc_misc()—Perform miscellaneous functions for a secure session” on page 41—Perform
miscellaneous functions for a secure session
v “gsk_secure_soc_open()—Get a handle for a secure session” on page 44—Get a handle for a secure
session
v “gsk_strerror()—Retrieve GSKit runtime error message” on page 62—Retrieve GSK runtime error
message
API introduced: V5R3
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