Date: Sun, 9 Jul 2000 22:22:58 -0700 (PDT) From: Bill Fenner <fenner@research.att.com> To: FreeBSD-gnats-submit@freebsd.org Subject: bin/19816: getnameinfo() dumps core on 131.118.32.4 Message-ID: <200007100522.WAA15748@fenestro.attlabs.att.com>
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>Number: 19816 >Category: bin >Synopsis: getnameinfo() dumps core on 131.118.32.4 >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sun Jul 09 22:30:03 PDT 2000 >Closed-Date: >Last-Modified: >Originator: Bill Fenner >Release: FreeBSD 4.0-STABLE i386 >Organization: AT&T Labs - Research >Environment: >Description: getnameinfo() dumps core on 131.118.32.4 It assumes that getipnodebyaddr() can not return an hp->h_name of NULL. However, it can, with the odd PTR record that 131.118.32.4 has: 4.32.118.131.in-addr.arpa. 1D IN PTR . I don't know if this is a bug in getipnodebyaddr() or getnameinfo(). >How-To-Repeat: #include <stdio.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <netdb.h> int main(int argc,char **argv) { struct sockaddr_in sin; char _hostname[256]; sin.sin_family = AF_INET; sin.sin_len = sizeof(sin); sin.sin_addr.s_addr = inet_addr("131.118.32.4"); getnameinfo((struct sockaddr*)&sin, sin.sin_len, _hostname, sizeof(_hostname) - 1, NULL, 0, NI_NAMEREQD); } >Fix: Unknown. Workaround: don't try to look up this IP address using getnameinfo(). >Release-Note: >Audit-Trail: >Unformatted: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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