Created attachment 419439 [details] change while(i<=nitems) to nl_cache_get_first and nl_cache_get_next Description of problem: libdhcp don't work if nics indexes are not uninterruptedly. For example on my system I have, sit0 with index 1, lo with index 1, eth0 with index 4, but nic_get_links can't find my eth0 nic in this case. # ./nl-tctree-dump lo loopback 00:00:00:00:00:00 mtu 16436 <loopback,up,> txqlen 0 weight 0 qdisc noqueue index 2 brd 00:00:00:00:00:00 eth0 ether 00:0c:29:4e:64:53 mtu 1500 <broadcast,multicast,up,> txqlen 1000 weight 64 qdisc pfifo_fast index 4 brd ff:ff:ff:ff:ff:ff pfifo_fast qdisc dev eth0 handle none parent none bands 3 refcnt 1 priomap [1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1] besteffort => 1 0x8 => 1 filler => 2 0x9 => 1 bulk => 2 0xa => 1 0x3 => 2 0xb => 1 interactive_bulk => 1 0xc => 1 0x5 => 2 0xd => 1 interactive => 0 0xe => 1 control => 0 0xf => 1 sit0 sit 0.0.0.0 mtu 1480 <noarp> txqlen 0 weight 0 qdisc noop index 1 brd 0.0.0.0 Attached patch fix this problem
I take libdhcp src.rpm from centos 5.5
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release.
*** Bug 705301 has been marked as a duplicate of this bug. ***
Reproduced on RHEL-5.7 (libdhcp-1.20-11.el5, nash-5.1.19.6-71.el5): [root@gilliam ~]# cd /sys/class/net/ [root@gilliam net]# for i in *; do echo -n "$i: "; cat $i/ifindex; done eth0: 4 lo: 1 sit0: 3 [root@gilliam net]# nash (running in test mode). Red Hat nash version 5.1.19.6 starting network --device eth0 --bootproto dhcp waiting for link... 0 seconds. Sending request for IP information through eth0 nic_get_links (343): No such file or directory nic_get_links (343): No such file or directory nic_by_name: no interface named eth0 found dhcp_nic: net_get_by_name(eth0) failed ERROR: Interface setup failed: pumpSetupInterface failed: get link - 19: No such device. Verified with libdhcp-1.20-13.el5 and nash-5.1.19.6-75.el5: [root@gilliam ~]# cd /sys/class/net/ [root@gilliam net]# for i in *; do echo -n "$i: "; cat $i/ifindex; done eth0: 4 lo: 1 sit0: 3 [root@gilliam net]# nash (running in test mode). Red Hat nash version 5.1.19.6 starting network --device eth0 --bootproto dhcp waiting for link... 0 seconds. Sending request for IP information through eth0 Listening on LPF/eth0/00:1c:c4:12:fc:30 Sending on LPF/eth0/00:1c:c4:12:fc:30 Sending on Socket/fallback DHCPREQUEST on eth0 to 255.255.255.255 port 67 (xid=0x3b7c8a44) DHCPREQUEST on eth0 to 255.255.255.255 port 67 (xid=0x3b7c8a44) DHCPACK from 10.10.36.113 (xid=0x3b7c8a44) bound to 10.10.9.126 -- renewal in 42906 seconds. DHCPv4 eth0 - obtained lease 10.10.9.126 DHCPv4 eth0 - option subnet-mask: 255.255.252.0 DHCPv4 eth0 - option subnet-mask - prefix_len: 22 broadcast: 10.10.11.255 DHCPv4 eth0 - option routers: [root@gilliam net]# Moving to VERIFIED.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2012-0193.html