lib/45564: 2nd socket created by socketpair(2) is not connected to 1st socket.

[naruse%airemix.jp@localhost]

>Number:         45564
>Category:       lib
>Synopsis:       2nd socket created by socketpair(2) is not connected to 1st 
>socket.
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    lib-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Nov 03 18:05:00 +0000 2011
>Originator:     Yui NARUSE
>Release:        NetBSD 5.99.56 i386
>Organization:
>Environment:
NetBSD nbsd.rubyci.org 5.99.56 NetBSD 5.99.56 (GENERIC) #1: Tue Nov  1 15:09:32 
JST 2011  
naruse%nbsd.rubyci.org@localhost:/usr/obj/sys/arch/i386/compile/GENERIC i386
>Description:
socketpair(2) should return two sockets connected with each other.
But current NetBSD's one returns invalid pair.
2nd pair is not connected to 1st one.
>How-To-Repeat:
Run following program.
The result will be:
res:-1 errno:57
getpeername: Socket is not connected


#include <stdio.h>
#include <errno.h>
#include <sys/socket.h>
#include <sys/un.h>

int main(void) {
    int sv[2];
    int res = socketpair(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0, sv);
    if (res != 0) {
        fprintf(stderr, "res:%d errno:%d\n",res,errno);
        perror("socketpair");
        return 1;
    }

    struct sockaddr_un addr;
    socklen_t len = (socklen_t)sizeof(addr);
    res = getpeername(sv[1], (struct sockaddr*)&addr, &len);
    if (res != 0) {
        fprintf(stderr, "res:%d errno:%d\n",res,errno);
        perror("getpeername");
        return 1;
    }
    return 0;
}

>Fix: