NAME¶
mstack - networking stack selection
SYNOPSIS¶
mstack [
-hv] [
-o protocol list]
stack_mountpoint
command
DESCRIPTION¶
In View-OS multiple networking stacks are available to processes at the same
time. View-OS supports the
msocket(2) system call. mstack defines the
default stack (for each address family) that is used when msocket refers to a
NULL pathname for its stack. mstack provides also a backward compatibility for
all the programs using the obsolete
socket(2) system call. The stack
mountpoint identifies the stack. In ViewOS it is the mountpoint where the
stack was mounted (by
mount(2)(8). In fact the call:
"socket(domain,type,protocol)"
is equivalent to:
"msocket(NULL,domain,type protocol)"
mstacks changes the default stack for the desired protocol families and executes
the command (by
execve(2)).
OPTIONS¶
- -h
- prints the mstack command usage
- -v
- sets the verbose mode on
- -o
- defines the list of protocols. Without a -o option, mstack redefines the
default stack for all protocols families. The list of protocols may
include the a comma separated sequence of the following items: all, unix
(or simply u), ipv4 (4), ipv6 (6), netlink (n), packet (p), bluetooth (b),
irda (i), ip (which include all ip related protocols ipv4, ipv6, netlink
and packet), # n where n is the number of protocol. Each item can
be prefixed by + or - to specify whether the protocol/group of protocols
must be added or removed from the set.
EXAMPLES¶
- mstack /dev/net/lwip ip addr
-
lists the address managed by the stack mounted on /dev/net/lwip.
- exec mstack /dev/net/null bash
-
disables the standard stack in a new bash (which overcomes the current
one).
- mstack -o ip /dev/net/lwip bash
-
starts a new bash which uses the stack /dev/net/lwip for ipv4 and
ipv6 but not for the other protocols.
- mstack -o -unix /dev/net/lwip bash
-
starts a new bash which uses the stack /dev/net/lwip for all
protocols but AF_UNIX.
- mstack -o +ip,-ipv6 /dev/net/lwip bash
-
starts a new bash which uses the stack /dev/net/lwip for ipv4,
netlink, packet but not ipv6.
SEE ALSO¶
umview(1), kmview(1), msocket(3), umnetnative(9),
umnetnull(9), umnetlwipv6(9), unix(7), ip(7),
ipv6(7), netlink(7), packet(7).
AUTHORS¶
View-OS is a project of the Computer Science Department, University of Bologna.
Project Leader: Renzo Davoli.
<
http://www.sourceforge.net/projects/view-os>
Howto's and further information can be found on the project wiki
<wiki.virtualsquare.org>.
