diff options
| -rw-r--r-- | src/util/virnetdevip.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/util/virnetdevip.c b/src/util/virnetdevip.c index d2d8968030..8c960ceeac 100644 --- a/src/util/virnetdevip.c +++ b/src/util/virnetdevip.c @@ -566,6 +566,43 @@ virNetDevIPCheckIPv6ForwardingCallback(struct nlmsghdr *resp, return 0; } + /* if no RTA_OIF was found, see if this is a multipath route (one + * which has an array of nexthops, each with its own interface) + */ + + rta_attr = (struct rtattr *)nlmsg_find_attr(resp, sizeof(struct rtmsg), RTA_MULTIPATH); + if (rta_attr) { + /* The data of the attribute is an array of rtnexthop */ + struct rtnexthop *nh = RTA_DATA(rta_attr); + size_t len = RTA_PAYLOAD(rta_attr); + + /* validate the attribute array length */ + len = MIN(len, ((char *)resp + NLMSG_PAYLOAD(resp, 0) - (char *)rta_attr)); + + while (len >= sizeof(*nh) && len >= nh->rtnh_len) { + /* check accept_ra for the interface of each nexthop */ + + ifname = virNetDevGetName(nh->rtnh_ifindex); + + if (ifname) + accept_ra = virNetDevIPGetAcceptRA(ifname); + + VIR_DEBUG("Checking multipath route nexthop device %s (%d), accept_ra: %d", + ifname, nh->rtnh_ifindex, accept_ra); + + if (!ifname || + (accept_ra != 2 && virNetDevIPCheckIPv6ForwardingAddIF(data, &ifname) < 0)) { + return -1; + } + + VIR_FREE(ifname); /* in case it wasn't added to the array */ + data->hasRARoutes = true; + + len -= NLMSG_ALIGN(nh->rtnh_len); + nh = RTNH_NEXT(nh); + } + } + return 0; } |