bin/150642: netstat doesn't print anything for SCTP sockets

[Valentin Nechayev]

>Number:         150642
>Category:       bin
>Synopsis:       netstat doesn't print anything for SCTP sockets
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Sep 17 10:40:01 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     Valentin Nechayev
>Release:        FreeBSD 8.1-RELEASE i386
>Organization:
Dark side of coredump
>Environment:
System: FreeBSD segfault.kiev.ua 8.1-RELEASE FreeBSD 8.1-RELEASE #0: Tue Jul 27 16:32:08 EEST 2010 root at segfault.kiev.ua:/usr/BSD/obj/usr/BSD/src/sys/sf81 i386

I was also told that the same on 7.2 and 9.0, so this is old problem.

>Description:

netstat (with mode to print sockets, either with or without -a) doesn't print
anything for active SCTP sockets.

>How-To-Repeat:

I use Python to line-by-line show though the same result is when using C.

Check before starting with socket:

$ fstat | fgrep sctp; netstat -anAW -p sctp; netstat -anAW | grep sctp
$ 

$ sysctl -b net.inet.sctp.assoclist | hd | less
00000000  01 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
000000a0

Create socket:

    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 132)

Check in other terminal:

$ fstat | fgrep sctp; netstat -anAW -p sctp; netstat -anAW | grep sctp
netch    python     70548    3* internet stream sctp c58ada14
$

$ sysctl -b net.inet.sctp.assoclist | hd | less
00000000  00 00 00 00 12 00 00 00  08 00 00 00 00 00 00 00  |................|
00000010  00 00 00 00 00 00 00 00  ff ff 00 00 00 00 00 00  |........ÿÿ......|
00000020  00 00 dd c4 f8 18 83 e7  f7 26 84 c0 10 19 83 e7  |..ÝÄø.ƒç÷&„À..ƒç|

[...skip rest - the only thing I shall demonstrate here there is new data]

Binding of the socket changes nothing in the fact of netstat
output absense itself.

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: