misc/92270: ppp does not work on renamed network interfaces

[Florian Klemenz]

>Number:         92270
>Category:       misc
>Synopsis:       ppp does not work on renamed network interfaces
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jan 24 16:20:03 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Florian Klemenz
>Release:        6.0
>Organization:
>Environment:
FreeBSD revenant.fok 6.0-RELEASE-p3-fok1 FreeBSD 6.0-RELEASE-p3-fok1 #1: Mon Jan 23 12:27:53 CET 2006     fok at revenant.fok:/usr/obj/usr/src/sys/REVENANT  i386

>Description:
ppp fails establishing a PPPoE connection when using a renamed network interface. Could be a bug in ppp or netgraph.
>How-To-Repeat:
/etc.rc.conf:
[..]
ifconfig_sis1_name="dsl0"
ifconfig_dsl0="up"
[..]

/etc/ppp/ppp.conf:
default:
  set device PPPoE:dsl0
[..]

ppp command line: /usr/sbin/ppp -quiet -ddial -nat default

/var/log/ppp.log:
[..]
Jan 24 16:00:14 revenant ppp[223]: Warning: dsl0: Cannot send a netgraph message: No such file or directory
Jan 24 16:01:14 revenant ppp[223]: Warning: deflink: PPPoE: unknown host
Jan 24 16:02:14 revenant ppp[223]: Warning: deflink: PPPoE: unknown host
Jan 24 16:02:14 revenant ppp[223]: Warning: deflink: Device (PPPoE:dsl0) must begin with a '/', a '!' or contain at least one ':'
Jan 24 16:02:14 revenant ppp[223]: Chat: Failed to open device
[..]

However, changing /etc/ppp/ppp.conf to use the original interface name ("set device PPPoE:sis1")establishes a connection, but there are still some issues since sis1 should really be addressed as dsl0:

/var/log/ppp.log:
Jan 24 16:13:11 revenant ppp[692]: Error: iface_ChangeFlags: ioctl(SIOCGIFFLAGS): Device not configured
Jan 24 16:13:11 revenant ppp[692]: Warning: deflink: Failed to set the IFF_UP flag on sis1


>Fix:
Workaround: Don't rename the interface which is used by ppp and everything works just fine.
>Release-Note:
>Audit-Trail:
>Unformatted: