[Bug libc/12095] New: getifaddrs() returns no IP address for ppp0

["thomas.jarosch at intra2net dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=12095

           Summary: getifaddrs() returns no IP address for ppp0
           Product: glibc
           Version: 2.11
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper.fsp@gmail.com
        ReportedBy: thomas.jarosch@intra2net.com


Hello,

getifaddrs() doesn't return any IP address for a ppp device. Here's
the corresponding gdb output (during ifa_addr NULL pointer access):

(gdb) print ifa->ifa_flags
$1 = 69841
(gdb) print ifa->ifa_addr
$2 = (sockaddr *) 0x0
(gdb) print ifa->ifa_ifu
$3 = {ifu_broadaddr = 0x0, ifu_dstaddr = 0x0}
(gdb) print ifa->ifa_data
$4 = (void *) 0x8166e7c
(gdb) print ifa->ifa_name
$5 = 0x8166a88 "ppp0"
(gdb) print ifa->ifa_netmask
$6 = (sockaddr *) 0x0
(gdb) print ifa->ifa_ifu
$7 = {ifu_broadaddr = 0x0, ifu_dstaddr = 0x0}

If I run the "ip addr" command from the "iproute" package,
I see the following output:

11: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
state UNKNOWN qlen 3
    link/ppp 
    inet 212.144.74.201 peer 145.253.1.55/32 scope global ppp0

As "ip addr" also uses the netlink interface to retrieve the information,
I suspect this is a problem inside the getifaddrs() implementation.

My glibc version is 2.11.2+Fedora patches from Fedora 12.
A diff between sysdeps/unix/sysv/linux/ifaddrs.c from git HEAD
and the version shipped in Fedora 12 showed no differences.

Kernel version is 2.6.34.7.

Please let me know how I can help to track this down.

Cheers,
Thomas

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