Date: Mon, 8 Mar 2004 18:51:37 +0300 (MSK) From: "."@babolo.ru To: Jerry Jensen <youknicks@yahoo.com> Cc: freebsd-net@freebsd.org Subject: Re: multiple logical interfaces Message-ID: <1078761097.455893.38094.nullmailer@cicuta.babolo.ru> In-Reply-To: <20040308091935.59513.qmail@web41811.mail.yahoo.com>
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> How can this be done programmatically rather than from
> the command line? Code snippets would be handy.
What "this" is?
ifconfig?
execlp("ifconfig", "ifconfig", "lo0", "inet", inetxt);
I never ifconfigured from C.
Sorry.
> --- .@babolo.ru wrote:
> > > Actually, what I want is the equivalent of this (which
> > > is in Linux) on FreeBSD. Note the ip address
> > > associated with each of the logical interfaces
> > > (lo:XX).
> > And what?
> > 0cicuta~(11)#ifconfig lo0
> > lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
> > inet6 ::1 prefixlen 128
> > inet6 fe80::1%lo0 prefixlen 64 scopeid 0x7
> > inet 127.0.0.1 netmask 0xffffff00
> > 0cicuta~(12)#ifconfig lo1
> > lo1: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
> > inet 127.0.1.1 netmask 0xffffff00
> > inet 127.0.1.2 netmask 0xffffffff
> > 0cicuta~(13)#ifconfig lo2
> > lo2: flags=8008<LOOPBACK,MULTICAST> mtu 16384
> > 0cicuta~(14)#ifconfig lo3
> > lo3: flags=8008<LOOPBACK,MULTICAST> mtu 16384
> > 0cicuta~(15)#ifconfig lo3 192.168.0.1/24
> > 0cicuta~(16)#ifconfig lo3
> > lo3: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
> > inet 192.168.0.1 netmask 0xffffff00
> >
> > The only disadvantage in
> > 0cicuta~(17)#uname -a
> > FreeBSD cicuta.babolo.ru 4.9-RC FreeBSD 4.9-RC #0: Fri Oct 10 11:37:45 MSD 2003 babolo@cicuta.babolo.ru:/tmp/babolo/usr/src/sys/cicuta i386
> > is that lo can't be created dynamically.
> >
> > One more quection: why not alias the lo0 ?
> >
> > > eth0 Link encap:Ethernet HWaddr
> > > 00:06:5B:19:55:EE
> > > inet addr:10.2.1.122 Bcast:10.255.255.255 Mask:255.0.0.0
> > > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> > > RX packets:5903525 errors:0 dropped:0 overruns:0 frame:0
> > > TX packets:5337692 errors:0 dropped:0 overruns:0 carrier:0
> > > collisions:0 txqueuelen:1000
> > > Interrupt:16 Base address:0xecc0 Memory:fe2ff000-fe2ff038
> > >
> > > eth1 Link encap:Ethernet HWaddr 00:06:5B:19:55:EF
> > > inet addr:192.168.6.122 Bcast:192.168.6.255 Mask:255.255.255.0
> > > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> > > RX packets:1818518022 errors:2 dropped:0 overruns:263 frame:2
> > > TX packets:1182175968 errors:0 dropped:0 overruns:0 carrier:0
> > > collisions:0 txqueuelen:1000
> > > Interrupt:17 Base address:0xec80 Memory:fe2fe000-fe2fe038
> > >
> > > lo Link encap:Local Loopback
> > > inet addr:127.0.0.1 Mask:255.0.0.0
> > > UP LOOPBACK RUNNING MTU:16436 Metric:1
> > > RX packets:199 errors:0 dropped:0 overruns:0 frame:0
> > > TX packets:199 errors:0 dropped:0 overruns:0 carrier:0
> > > collisions:0 txqueuelen:0
> > >
> > > lo:10 Link encap:Local Loopback
> > > inet addr:202.175.33.10 Mask:255.255.255.255
> > > UP LOOPBACK RUNNING MTU:16436 Metric:1
> > >
> > > lo:11 Link encap:Local Loopback
> > > inet addr:193.65.100.99 Mask:255.255.255.255
> > > UP LOOPBACK RUNNING MTU:16436 Metric:1
> > >
> > > lo:12 Link encap:Local Loopback
> > > inet addr:193.65.100.100 Mask:255.255.255.255
> > > UP LOOPBACK RUNNING MTU:16436 Metric:1
> > >
> > > lo:13 Link encap:Local Loopback
> > > inet addr:210.183.28.42 Mask:255.255.255.255
> > > UP LOOPBACK RUNNING MTU:16436 Metric:1
> > >
> > > --- .@babolo.ru wrote:
> > > > > is it possible in freebsd to have multiple logical
> > > > > interfaces associated with say the loopback interface?
> > > > > if so, how does one do this programmatically (as
> > > > > opposed to from the command line).
> > > > >
> > > > > need this for building traffic generators that need to
> > > > > simulate a bunch of different ip sources. solaris
> > > > > allows it as does linux i believe.
> > > > > thx.
> > > > Is it what you want?
> > > >
> > > > > ifconfig -a | grep lo
> > > > lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
> > > > inet6 fe80::1%lo0 prefixlen 64 scopeid 0xa
> > > > lo1: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
> > > > lo2: flags=8008<LOOPBACK,MULTICAST> mtu 16384
> > > > lo3: flags=8008<LOOPBACK,MULTICAST> mtu 16384
> > > >
> > > > If it is, there is from kernel config:
> > > >
> > > > > grep loop /sys/i386/conf/garkin
> > > > pseudo-device loop 4 # Network loopback
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