[BusyBox 0001601]: No (or wrong) support for virtual interfaces in ifup, ifdown, /etc/network/interfaces.
bugs at busybox.net
bugs at busybox.net
Wed Nov 21 18:10:16 UTC 2007
A NOTE has been added to this issue.
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http://busybox.net/bugs/view.php?id=1601
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Reported By: iggarpe
Assigned To: BusyBox
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Project: BusyBox
Issue ID: 1601
Category: Networking Support
Reproducibility: always
Severity: minor
Priority: normal
Status: assigned
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Date Submitted: 11-21-2007 08:10 PST
Last Modified: 11-21-2007 10:10 PST
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Summary: No (or wrong) support for virtual interfaces in
ifup, ifdown, /etc/network/interfaces.
Description:
If you define, for example, interface eth0:0 as follows in
/etc/network/interfaces:
iface eth0 inet static
iface eth0:0 inet static
address 192.168.100.10
netmask 255.255.255.0
And then you try to activate it with "ifup eth0:0", ifup will NOT complain
about anything but will actually configure eth0 instead of eth0:0.
(it will configure eth0 using the configuration specified for eth0:0)
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iggarpe - 11-21-07 10:10
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The following code snippet is from file networking/ifupdown.c, function
get_var:
if (strncmpz(id, "iface", idlen) == 0) {
char *result;
static char label_buf[20];
safe_strncpy(label_buf, ifd->iface, sizeof(label_buf));
result = strchr(label_buf, ':');
if (result) {
*result = '\0';
}
return label_buf;
}
Clearly it is intentionally ripping off the virtual interface suffic ":n",
and that's the reason "ifup eth0:0" will wrongly issue commands for eth0
instead of eth0:0.
Any ideas about why the code is removing the ":n" ???
(I just checked and the ifup that comes with my ubuntu development machine
works as espected, properly issuing commands and configuring virtual
interfaces)
Issue History
Date Modified Username Field Change
======================================================================
11-21-07 08:10 iggarpe New Issue
11-21-07 08:10 iggarpe Status new => assigned
11-21-07 08:10 iggarpe Assigned To => BusyBox
11-21-07 10:10 iggarpe Note Added: 0002945
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