| Standards / Extensions | C or C++ | Dependencies |
|---|---|---|
BSD 4.3 |
both | OS/390 V2R8 |
#define _XOPEN_SOURCE_EXTENDED 1
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>
int dn_find(u_char *exp_dn, u_char *msg, u_char **dnptrs, u_char **lastdnptr);The dn_find() function will search for the expanded name exp_dn in the list of previously compressed names dnptrs.
dnptrs is the pointer to the first name in the list, not the pointer to the start of the message. The limit to the array is specified by lastdnptr.
If successful, dn_find() returns the offset of the expanded name exp_dn found in the message.
If unsuccessful, dn_find() returns -1 to report the error, when the name was not found before the end of the list was reached.
There are no documented errno values.