KRB5_KRBHST_INIT(3) | Library Functions Manual | KRB5_KRBHST_INIT(3) |
krb5_error_code
krb5_krbhst_init(krb5_context context, const char *realm, unsigned int type, krb5_krbhst_handle *handle);
krb5_error_code
krb5_krbhst_init_flags(krb5_context context, const char *realm, unsigned int type, int flags, krb5_krbhst_handle *handle);
krb5_error_code
krb5_krbhst_next(krb5_context context, krb5_krbhst_handle handle, krb5_krbhst_info **host);
krb5_error_code
krb5_krbhst_next_as_string(krb5_context context, krb5_krbhst_handle handle, char *hostname, size_t hostlen);
void
krb5_krbhst_reset(krb5_context context, krb5_krbhst_handle handle);
void
krb5_krbhst_free(krb5_context context, krb5_krbhst_handle handle);
krb5_error_code
krb5_krbhst_format_string(krb5_context context, const krb5_krbhst_info *host, char *hostname, size_t hostlen);
krb5_error_code
krb5_krbhst_get_addrinfo(krb5_context context, krb5_krbhst_info *host, struct addrinfo **ai);
First a handle to a particular service is obtained by calling krb5_krbhst_init() (or krb5_krbhst_init_flags()) with the realm of interest and the type of service to lookup. The type can be one of:
The handle is returned to the caller, and should be passed to the other functions.
The flag argument to krb5_krbhst_init_flags is the same flags as krb5_send_to_kdc_flags() uses. Possible values are:
For each call to krb5_krbhst_next() information on a new host is returned. The former function returns in host a pointer to a structure containing information about the host, such as protocol, hostname, and port:
typedef struct krb5_krbhst_info { enum { KRB5_KRBHST_UDP, KRB5_KRBHST_TCP, KRB5_KRBHST_HTTP } proto; unsigned short port; struct addrinfo *ai; struct krb5_krbhst_info *next; char hostname[1]; } krb5_krbhst_info;
The related function, krb5_krbhst_next_as_string(), return the same information as a URL-like string.
When there are no more hosts, these functions return KRB5_KDC_UNREACH.
To re-iterate over all hosts, call krb5_krbhst_reset() and the next call to krb5_krbhst_next() will return the first host.
When done with the handle, krb5_krbhst_free() should be called.
To use a krb5_krbhst_info, there are two functions: krb5_krbhst_format_string() that will return a printable representation of that struct and krb5_krbhst_get_addrinfo() that will return a struct addrinfo that can then be used for communicating with the server mentioned.
krb5_krbhst_handle handle; char host[MAXHOSTNAMELEN]; krb5_krbhst_init(context, "MY.REALM", KRB5_KRBHST_KDC, &handle); while(krb5_krbhst_next_as_string(context, handle, host, sizeof(host)) == 0) printf("%s\n", host); krb5_krbhst_free(context, handle);
May 10, 2005 | NetBSD 7.2 |