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[Bug network/17215] New: getaddrinfo with AI_CANONNAME and AF_INET causes PTR lookup
- From: "brunni at netestate dot de" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Wed, 30 Jul 2014 14:00:48 +0000
- Subject: [Bug network/17215] New: getaddrinfo with AI_CANONNAME and AF_INET causes PTR lookup
- Auto-submitted: auto-generated
https://sourceware.org/bugzilla/show_bug.cgi?id=17215
Bug ID: 17215
Summary: getaddrinfo with AI_CANONNAME and AF_INET causes PTR
lookup
Product: glibc
Version: 2.17
Status: NEW
Severity: normal
Priority: P2
Component: network
Assignee: unassigned at sourceware dot org
Reporter: brunni at netestate dot de
getaddrinfo makes a PTR lookup when called with ai_flags = AI_CANONNAME and
ai_family = AF_INET:
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
struct addrinfo hints = {.ai_flags = AI_CANONNAME, .ai_family = AF_INET};
int main (int argc, char *argv[])
{
struct addrinfo *ap;
int err;
err = getaddrinfo("netestate.de", "500", &hints, &ap);
}
This is problematic for me as Javas InetAddress.getByName() works like this on
ipv4 systems and causes an unnecessary reverse lookup for every forward lookup.
It seems to be fixed in current distributions:
https://bugzilla.redhat.com/show_bug.cgi?id=714823
I get the problem when using glibc 2.17 compiled from source. Is this still an
issue with glibc 2.19?
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