| Summary: | ifconfig oddly won't respect CIDR notation | ||
|---|---|---|---|
| Product: | Busybox | Reporter: | Јован Јаневски <jovan> |
| Component: | Networking | Assignee: | unassigned |
| Status: | RESOLVED FIXED | ||
| Severity: | critical | CC: | busybox-cvs, jovan |
| Priority: | P5 | ||
| Version: | unspecified | ||
| Target Milestone: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Host: | Target: | ||
| Build: | |||
Indeed, bbox's ifconfig doesn't accept that format. It does not bail out by accident, because parser strips out /MASK before parsing IP. (Why? The parser is reused for "add IPV6/MASK" and "del IPV6/MASK" cases). For now I made so that it won't accept this format: commit 31dc8603eedc0140c798c9af3404a35ea190af2c Author: Denys Vlasenko <vda.linux@googlemail.com> Date: Sun Jan 20 18:10:12 2013 +0100 ifconfig: do not accept "ifconfig eth0 up 1.2.3.4/17" (ip with mask) > i could use: > ---- > ifconfig eth4 172.16.2.1 netmask 255.255.255.0 broadcast 172.16.2.255 Please do. That's how ifconfig worked from the time immemorial, before new netmask notation was born. If you want more modern tool, consider switching to ip. Thank You. Best Regards, Jovan |
Hello, I am using TinyCoreLinux, kernel 3.0.21-tinycore with BusyBox v1.20.1 installed on it. If i try to assign interface IP and subnet within the 192.168.0.0/16 subnet using for example: ---- ifconfig eth4 up 192.168.1.1/24 ---- My specified CIDR notation is respected and i get 192.168.1.1/24: ---- ifconfig eth4 eth4 Link encap:Ethernet HWaddr 00:00:E8:XX:XX:XX inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: XXXX::XXX:XXXX:XX:XX/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:266 errors:0 dropped:0 overruns:0 frame:0 TX packets:41 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:22874 (22.3 KiB) TX bytes:4338 (4.2 KiB) Interrupt:18 Base address:0xba00 ---- But if i try to assign interface IP and subnet within 172.16.0.0/12, 10.0.0.0/8 or other subnets using for example: ---- ifconfig eth4 up 172.16.2.1/24 ====and==== ifconfig eth4 up 10.0.0.1/24 ---- Then my specified CIRD notation is not respected and i get 172.16.2.1/12 and 10.0.0.1/8 instead: ---- ifconfig eth4 eth4 Link encap:Ethernet HWaddr 00:00:E8:XX:XX:XX inet addr:172.16.2.1 Bcast:172.16.255.255 Mask:255.255.0.0 inet6 addr: XXXX::XXX:XXXX:XX:XX/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:296 errors:0 dropped:0 overruns:0 frame:0 TX packets:41 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:24674 (24.0 KiB) TX bytes:4338 (4.2 KiB) Interrupt:18 Base address:0xba00 ====and==== eth4 Link encap:Ethernet HWaddr 00:00:E8:XX:XX:XX inet addr:10.0.0.1 Bcast:10.255.255.255 Mask:255.0.0.0 inet6 addr: XXXX::XXX:XXXX:XX:XX/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:296 errors:0 dropped:0 overruns:0 frame:0 TX packets:41 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:24674 (24.0 KiB) TX bytes:4338 (4.2 KiB) Interrupt:18 Base address:0xba00 ---- The same problem happens if i try to assign 1.1.1.1/24 instead i get 1.1.1.1/8. I've tested the commands on Debian 6.0.5 both 32 and 64 bit with the standard ifconfig tool (non-busybox) it works without any problems. The only way to get the proper IP and subnet assignment per interface while using busybox is - instead of using: ---- ifconfig eth4 up 172.16.2.1/24 ---- i could use: ---- ifconfig eth4 172.16.2.1 netmask 255.255.255.0 broadcast 172.16.2.255 ---- And then i get the propper IP and subnet assignment. Any help regarding this problem is appreciated. Best Regards, Jovan