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Hi All,
ipvsadm-1.26 reports error as "*Invalid operation. Possibly wrong module
version, address not unicast, ...*" for a valid request with option "-ln
-t".
*Ex*:
# ipvsadm -ln -t a.b.c.d:http
Invalid operation. Possibly wrong module version, address not unicast, ...
*Bug details*:
# ipvsadm -l
IP Virtual Server version 1.2.1 (size=131072)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP a.b.c.d:http wrr
-> w.x.y.z:http Masq 100 0 0
# ipvsadm -ln -t a.b.c.d:http
Invalid operation. Possibly wrong module version, address not unicast, ...
# which gcc
/usr/bin/gcc
# gcc --version
gcc (GCC) 4.1.1
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
*RCA:*
In lipipvs.c tsvc variable was not getting initialized. Field members were
set to junk values. ipvs_nl_fill_service_attr was used to create message
using these junk values too. leading to this issue.
*Fix:*
Initializing the structure variable to 0 solves the issue.
*Diff for the fix:*
diff -urNp ipvsadm-1.26/libipvs/libipvs.c ipvsadm-1.26_lb/libipvs/libipvs.c
--- ipvsadm-1.26/libipvs/libipvs.c 2011-02-06 18:38:57.000000000 -0800
+++ ipvsadm-1.26_lb/libipvs/libipvs.c 2013-05-03 02:57:08.000000000 -0700
@@ -921,6 +921,7 @@ ipvs_get_service(__u32 fwmark, __u16 af,
struct ip_vs_get_services *get;
struct nl_msg *msg;
ipvs_service_t tsvc;
+ memset(&tsvc, 0, sizeof(ipvs_service_t));
tsvc.fwmark = fwmark;
tsvc.af = af;
tsvc.protocol= protocol;
*Note : *Works fine with gcc-4.3.2. It initializes uninitialized data
structure members. So issue is not seen here.
-------------------------------------------------
I am new to this mailing-list but wanted to contribute. If I am posting at
the wrong place, my sincere apologies. Would request to guide me to correct
link or mailing list.
Thanks and Regards,
Ankit
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