return netlink_batch_add_msg(bth, ctx, netlink_intf_msg_encoder, false);
}
-int netlink_interface_addr(struct nlmsghdr *h, ns_id_t ns_id, int startup)
-{
- int len;
- struct ifaddrmsg *ifa;
- struct rtattr *tb[IFA_MAX + 1];
- struct interface *ifp;
- void *addr;
- void *broad;
- uint8_t flags = 0;
- char *label = NULL;
- struct zebra_ns *zns;
- uint32_t metric = METRIC_MAX;
- uint32_t kernel_flags = 0;
-
- frrtrace(3, frr_zebra, netlink_interface_addr, h, ns_id, startup);
-
- zns = zebra_ns_lookup(ns_id);
- ifa = NLMSG_DATA(h);
-
- if (ifa->ifa_family != AF_INET && ifa->ifa_family != AF_INET6) {
- flog_warn(
- EC_ZEBRA_UNKNOWN_FAMILY,
- "Invalid address family: %u received from kernel interface addr change: %s",
- ifa->ifa_family, nl_msg_type_to_str(h->nlmsg_type));
- return 0;
- }
-
- if (h->nlmsg_type != RTM_NEWADDR && h->nlmsg_type != RTM_DELADDR)
- return 0;
-
- len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ifaddrmsg));
- if (len < 0) {
- zlog_err(
- "%s: Message received from netlink is of a broken size: %d %zu",
- __func__, h->nlmsg_len,
- (size_t)NLMSG_LENGTH(sizeof(struct ifaddrmsg)));
- return -1;
- }
-
- netlink_parse_rtattr(tb, IFA_MAX, IFA_RTA(ifa), len);
-
- ifp = if_lookup_by_index_per_ns(zns, ifa->ifa_index);
- if (ifp == NULL) {
- if (startup) {
- /* During startup, failure to lookup the referenced
- * interface should not be an error, so we have
- * downgraded this condition to warning, and we permit
- * the startup interface state retrieval to continue.
- */
- flog_warn(EC_LIB_INTERFACE,
- "%s: can't find interface by index %d",
- __func__, ifa->ifa_index);
- return 0;
- } else {
- flog_err(EC_LIB_INTERFACE,
- "%s: can't find interface by index %d",
- __func__, ifa->ifa_index);
- return -1;
- }
- }
-
- /* Flags passed through */
- if (tb[IFA_FLAGS])
- kernel_flags = *(int *)RTA_DATA(tb[IFA_FLAGS]);
- else
- kernel_flags = ifa->ifa_flags;
-
- if (IS_ZEBRA_DEBUG_KERNEL) /* remove this line to see initial ifcfg */
- {
- char buf[BUFSIZ];
- zlog_debug("%s %s %s flags 0x%x:", __func__,
- nl_msg_type_to_str(h->nlmsg_type), ifp->name,
- kernel_flags);
- if (tb[IFA_LOCAL])
- zlog_debug(" IFA_LOCAL %s/%d",
- inet_ntop(ifa->ifa_family,
- RTA_DATA(tb[IFA_LOCAL]), buf,
- BUFSIZ),
- ifa->ifa_prefixlen);
- if (tb[IFA_ADDRESS])
- zlog_debug(" IFA_ADDRESS %s/%d",
- inet_ntop(ifa->ifa_family,
- RTA_DATA(tb[IFA_ADDRESS]), buf,
- BUFSIZ),
- ifa->ifa_prefixlen);
- if (tb[IFA_BROADCAST])
- zlog_debug(" IFA_BROADCAST %s/%d",
- inet_ntop(ifa->ifa_family,
- RTA_DATA(tb[IFA_BROADCAST]), buf,
- BUFSIZ),
- ifa->ifa_prefixlen);
- if (tb[IFA_LABEL] && strcmp(ifp->name, RTA_DATA(tb[IFA_LABEL])))
- zlog_debug(" IFA_LABEL %s",
- (char *)RTA_DATA(tb[IFA_LABEL]));
-
- if (tb[IFA_CACHEINFO]) {
- struct ifa_cacheinfo *ci = RTA_DATA(tb[IFA_CACHEINFO]);
- zlog_debug(" IFA_CACHEINFO pref %d, valid %d",
- ci->ifa_prefered, ci->ifa_valid);
- }
- }
-
- /* logic copied from iproute2/ip/ipaddress.c:print_addrinfo() */
- if (tb[IFA_LOCAL] == NULL)
- tb[IFA_LOCAL] = tb[IFA_ADDRESS];
- if (tb[IFA_ADDRESS] == NULL)
- tb[IFA_ADDRESS] = tb[IFA_LOCAL];
-
- /* local interface address */
- addr = (tb[IFA_LOCAL] ? RTA_DATA(tb[IFA_LOCAL]) : NULL);
-
- /* is there a peer address? */
- if (tb[IFA_ADDRESS]
- && memcmp(RTA_DATA(tb[IFA_ADDRESS]), RTA_DATA(tb[IFA_LOCAL]),
- RTA_PAYLOAD(tb[IFA_ADDRESS]))) {
- broad = RTA_DATA(tb[IFA_ADDRESS]);
- SET_FLAG(flags, ZEBRA_IFA_PEER);
- } else
- /* seeking a broadcast address */
- broad = (tb[IFA_BROADCAST] ? RTA_DATA(tb[IFA_BROADCAST])
- : NULL);
-
- /* addr is primary key, SOL if we don't have one */
- if (addr == NULL) {
- zlog_debug("%s: Local Interface Address is NULL for %s",
- __func__, ifp->name);
- return -1;
- }
-
- /* Flags. */
- if (kernel_flags & IFA_F_SECONDARY)
- SET_FLAG(flags, ZEBRA_IFA_SECONDARY);
-
- /* Label */
- if (tb[IFA_LABEL])
- label = (char *)RTA_DATA(tb[IFA_LABEL]);
-
- if (label && strcmp(ifp->name, label) == 0)
- label = NULL;
-
- if (tb[IFA_RT_PRIORITY])
- metric = *(uint32_t *)RTA_DATA(tb[IFA_RT_PRIORITY]);
-
- /* Register interface address to the interface. */
- if (ifa->ifa_family == AF_INET) {
- if (ifa->ifa_prefixlen > IPV4_MAX_BITLEN) {
- zlog_err(
- "Invalid prefix length: %u received from kernel interface addr change: %s",
- ifa->ifa_prefixlen,
- nl_msg_type_to_str(h->nlmsg_type));
- return -1;
- }
-
- if (h->nlmsg_type == RTM_NEWADDR)
- connected_add_ipv4(ifp, flags, (struct in_addr *)addr,
- ifa->ifa_prefixlen,
- (struct in_addr *)broad, label,
- metric);
- else if (CHECK_FLAG(flags, ZEBRA_IFA_PEER)) {
- /* Delete with a peer address */
- connected_delete_ipv4(
- ifp, flags, (struct in_addr *)addr,
- ifa->ifa_prefixlen, broad);
- } else
- connected_delete_ipv4(
- ifp, flags, (struct in_addr *)addr,
- ifa->ifa_prefixlen, NULL);
- }
-
- if (ifa->ifa_family == AF_INET6) {
- if (ifa->ifa_prefixlen > IPV6_MAX_BITLEN) {
- zlog_err(
- "Invalid prefix length: %u received from kernel interface addr change: %s",
- ifa->ifa_prefixlen,
- nl_msg_type_to_str(h->nlmsg_type));
- return -1;
- }
- if (h->nlmsg_type == RTM_NEWADDR) {
- /* Only consider valid addresses; we'll not get a
- * notification from
- * the kernel till IPv6 DAD has completed, but at init
- * time, Quagga
- * does query for and will receive all addresses.
- */
- if (!(kernel_flags
- & (IFA_F_DADFAILED | IFA_F_TENTATIVE)))
- connected_add_ipv6(ifp, flags,
- (struct in6_addr *)addr,
- (struct in6_addr *)broad,
- ifa->ifa_prefixlen, label,
- metric);
- } else
- connected_delete_ipv6(ifp, (struct in6_addr *)addr,
- NULL, ifa->ifa_prefixlen);
- }
-
- /*
- * Linux kernel does not send route delete on interface down/addr del
- * so we have to re-process routes it owns (i.e. kernel routes)
- */
- if (h->nlmsg_type != RTM_NEWADDR)
- rib_update(RIB_UPDATE_KERNEL);
-
- return 0;
-}
-
/*
* Parse and validate an incoming interface address change message,
* generating a dplane context object.
projects / matthieu / frr.git / commitdiff