[libvirt] [PATCH v2] virNetDevIPCheckIPv6ForwardingCallback fixes
Add check for more than one RTA_OIF, even though this is rather
unlikely.
Get rid of the buggy switch / break as this code won't need to
handle more attributes.
Use VIR_WARNINGS_NO_CAST_ALIGN to fix impossible to fix
util/virnetdevip.c:560:17: error: cast increases required alignment of target type
[-Werror=cast-align]
---
Diff to v1:
* Add error message
* Use VIR_WARNINGS_NO_CAST_ALIGN
src/util/virnetdevip.c | 17 +++++++++++++----
1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/src/util/virnetdevip.c b/src/util/virnetdevip.c
index c9ac6baf7..726fa6c3e 100644
--- a/src/util/virnetdevip.c
+++ b/src/util/virnetdevip.c
@@ -556,15 +556,24 @@ virNetDevIPCheckIPv6ForwardingCallback(const struct nlmsghdr *resp,
if (resp->nlmsg_type != RTM_NEWROUTE)
return ret;
- /* Extract a few attributes */
+ /* Extract a device ID attribute */
+ VIR_WARNINGS_NO_CAST_ALIGN
for (rta = RTM_RTA(rtmsg); RTA_OK(rta, len); rta = RTA_NEXT(rta, len)) {
- switch (rta->rta_type) {
- case RTA_OIF:
+ VIR_WARNINGS_RESET
+ if (rta->rta_type == RTA_OIF) {
oif = *(int *)RTA_DATA(rta);
+ /* Should never happen: netlink message would be broken */
+ if (ifname) {
+ char *ifname2 = virNetDevGetName(oif);
+ VIR_WARN("Single route has unexpected 2nd interface "
+ "- '%s' and '%s'", ifname, ifname2);
+ VIR_FREE(ifname2);
+ break;
+ }
+
if (!(ifname = virNetDevGetName(oif)))
goto error;
- break;
}
}
--
2.12.0