const char *ipsec_version_code(void);
const char *ipsec_version_string(void);
const char **ipsec_copyright_notice(void);
Ipsec_version_code returns a pointer to a string constant containing the current IPsec version code, such as ``1.92'' or ``snap2001Nov19b''.
Ipsec_version_string returns a pointer to a string constant giving a full version identification, consisting of the version code preceded by a prefix identifying the software, e.g. ``Linux FreeS/WAN 1.92''.
Ipsec_copyright_notice returns a pointer to a vector of pointers, terminated by a NULL, which is the text of a suitable copyright notice. Each pointer points to a string constant (possibly empty) which is one line of the somewhat-verbose copyright notice. The strings are NUL-terminated and do not contain a newline; supplying suitable line termination for the output device is the caller's responsibility.