+++ This bug was initially created as a clone of Bug #489419 +++
Description of Problem:
glibc getnameinfo() returns 0 when both nodename and servname are set to null and flag is set to 'NI_NAMEREQD'.
The synopsis of function getnameinfo is:
int getnameinfo(const struct sockaddr *sa, socklen_t salen, char *node, socklen_t nodelen, char *service, socklen_t servicelen, int flags);
RFC3493 tells that getnameinfo() should returns 'EAI_NONAME' when both nodename and servname are null. So when use getnameinfo() with both nodename and servname are null and the NI_NAMEREQD flag is set, glibc should return 'EAI_NONAME' rather than 0.
Version-Release number of selected component:
glibc-2.3.4-2.43
How reproducible:
every time
Step to Reproduce:
1. gcc function-nodename-servname-null.c
2. ./a.out
Actual Results:
# ./a.out
==Both nodename and servname are null if the NI_NAMEREQD flag is set==
ERROR:return 0, expect error EAI_NONAME
<=== NG ===>
Expected Results:
# ./a.out
==Both nodename and servname are null if the NI_NAMEREQD flag is set==
