/* Interface's address information get. */
int
ifam_read (struct ifa_msghdr *ifam)
{
struct interface *ifp;
union sockunion addr, mask, gate;
/* Check does this interface exist or not. */
ifp = if_lookup_by_index (ifam->ifam_index);
if (ifp == NULL)
{
zlog_warn ("no interface for index %d", ifam->ifam_index);
return -1;
}
/* Allocate and read address information. */
ifam_read_mesg (ifam, &addr, &mask, &gate);
/* Check interface flag for implicit up of the interface. */
if_refresh (ifp);
/* Add connected address. */
switch (sockunion_family (&addr))
{
case AF_INET:
if (ifam->ifam_type == RTM_NEWADDR)
connected_add_ipv4 (ifp, 0, &addr.sin.sin_addr,
ip_masklen (mask.sin.sin_addr),
&gate.sin.sin_addr, NULL);
else
connected_delete_ipv4 (ifp, 0, &addr.sin.sin_addr,
ip_masklen (mask.sin.sin_addr),
&gate.sin.sin_addr, NULL);
break;
#ifdef HAVE_IPV6
case AF_INET6:
/* Unset interface index from link-local address when IPv6 stack
is KAME. */
if (IN6_IS_ADDR_LINKLOCAL (&addr.sin6.sin6_addr))
SET_IN6_LINKLOCAL_IFINDEX (addr.sin6.sin6_addr, 0);
if (ifam->ifam_type == RTM_NEWADDR)
connected_add_ipv6 (ifp,
&addr.sin6.sin6_addr,
ip6_masklen (mask.sin6.sin6_addr),
&gate.sin6.sin6_addr);
else
connected_delete_ipv6 (ifp,
&addr.sin6.sin6_addr,
ip6_masklen (mask.sin6.sin6_addr),
&gate.sin6.sin6_addr);
break;
#endif /* HAVE_IPV6 */
default:
/* Unsupported family silently ignore... */
break;
}
return 0;
}
int
ifaddr_proc_ipv6 ()
{
FILE *fp;
char buf[PROCBUFSIZ];
int n;
char addr[33];
char ifname[20];
int ifindex, plen, scope, status;
struct interface *ifp;
struct prefix_ipv6 p;
/* Open proc file system. */
fp = fopen (_PATH_PROC_NET_IF_INET6, "r");
if (fp == NULL)
{
zlog_warn ("Can't open proc file %s: %s",
_PATH_PROC_NET_IF_INET6, strerror (errno));
return -1;
}
/* Get interface's IPv6 address. */
while (fgets (buf, PROCBUFSIZ, fp) != NULL)
{
n = sscanf (buf, "%32s %02x %02x %02x %02x %20s",
addr, &ifindex, &plen, &scope, &status, ifname);
if (n != 6)
continue;
ifp = if_get_by_name (ifname);
/* Fetch interface's IPv6 address. */
str2in6_addr (addr, &p.prefix);
p.prefixlen = plen;
connected_add_ipv6 (ifp, &p.prefix, p.prefixlen, NULL);
}
return 0;
}
/* Interface's address information get. */
int
ifam_read (struct ifa_msghdr *ifam)
{
struct interface *ifp = NULL;
union sockunion addr, mask, brd;
char ifname[INTERFACE_NAMSIZ];
short ifnlen = 0;
char isalias = 0;
int flags = 0;
ifname[0] = ifname[INTERFACE_NAMSIZ - 1] = '\0';
/* Allocate and read address information. */
ifam_read_mesg (ifam, &addr, &mask, &brd, ifname, &ifnlen);
if ((ifp = if_lookup_by_index(ifam->ifam_index)) == NULL)
{
zlog_warn ("%s: no interface for ifname %s, index %d",
__func__, ifname, ifam->ifam_index);
return -1;
}
if (ifnlen && strncmp (ifp->name, ifname, INTERFACE_NAMSIZ))
isalias = 1;
/* N.B. The info in ifa_msghdr does not tell us whether the RTA_BRD
field contains a broadcast address or a peer address, so we are forced to
rely upon the interface type. */
if (if_is_pointopoint(ifp))
SET_FLAG(flags, ZEBRA_IFA_PEER);
#if 0
/* it might seem cute to grab the interface metric here, however
* we're processing an address update message, and so some systems
* (e.g. FBSD) dont bother to fill in ifam_metric. Disabled, but left
* in deliberately, as comment.
*/
ifp->metric = ifam->ifam_metric;
#endif
/* Add connected address. */
switch (sockunion_family (&addr))
{
case AF_INET:
if (ifam->ifam_type == RTM_NEWADDR)
connected_add_ipv4 (ifp, flags, &addr.sin.sin_addr,
ip_masklen (mask.sin.sin_addr),
&brd.sin.sin_addr,
(isalias ? ifname : NULL));
else
connected_delete_ipv4 (ifp, flags, &addr.sin.sin_addr,
ip_masklen (mask.sin.sin_addr),
&brd.sin.sin_addr);
break;
#ifdef HAVE_IPV6
case AF_INET6:
/* Unset interface index from link-local address when IPv6 stack
is KAME. */
if (IN6_IS_ADDR_LINKLOCAL (&addr.sin6.sin6_addr))
SET_IN6_LINKLOCAL_IFINDEX (addr.sin6.sin6_addr, 0);
if (ifam->ifam_type == RTM_NEWADDR)
connected_add_ipv6 (ifp, flags, &addr.sin6.sin6_addr,
ip6_masklen (mask.sin6.sin6_addr),
&brd.sin6.sin6_addr,
(isalias ? ifname : NULL));
else
connected_delete_ipv6 (ifp,
&addr.sin6.sin6_addr,
ip6_masklen (mask.sin6.sin6_addr),
&brd.sin6.sin6_addr);
break;
#endif /* HAVE_IPV6 */
default:
/* Unsupported family silently ignore... */
break;
}
/* Check interface flag for implicit up of the interface. */
if_refresh (ifp);
#ifdef SUNOS_5
/* In addition to lacking IFANNOUNCE, on SUNOS IFF_UP is strange.
* See comments for SUNOS_5 in interface.c::if_flags_mangle.
*
* Here we take care of case where the real IFF_UP was previously
* unset (as kept in struct zebra_if.primary_state) and the mangled
* IFF_UP (ie IFF_UP set || listcount(connected) has now transitioned
* to unset due to the lost non-primary address having DELADDR'd.
*
* we must delete the interface, because in between here and next
* event for this interface-name the administrator could unplumb
* and replumb the interface.
*/
if (!if_is_up (ifp))
if_delete_update (ifp);
#endif /* SUNOS_5 */
return 0;
}
/* Lookup interface IPv4/IPv6 address. */
static int
netlink_interface_addr (struct sockaddr_nl *snl, struct nlmsghdr *h)
{
int len;
struct ifaddrmsg *ifa;
struct rtattr *tb[IFA_MAX + 1];
struct interface *ifp;
void *addr;
void *broad;
u_char flags = 0;
char *label = NULL;
ifa = NLMSG_DATA (h);
if (ifa->ifa_family != AF_INET
#ifdef HAVE_IPV6
&& ifa->ifa_family != AF_INET6
#endif /* HAVE_IPV6 */
)
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)
return -1;
memset (tb, 0, sizeof tb);
netlink_parse_rtattr (tb, IFA_MAX, IFA_RTA (ifa), len);
ifp = if_lookup_by_index (ifa->ifa_index);
if (ifp == NULL)
{
zlog_err ("netlink_interface_addr can't find interface by index %d",
ifa->ifa_index);
return -1;
}
if (IS_DEBUG_HA(kroute, KROUTE)) /* remove this line to see initial ifcfg */
{
char buf[BUFSIZ];
zlog_debug ("netlink_interface_addr %s %s:",
lookup (nlmsg_str, h->nlmsg_type), ifp->name);
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, KROUTE_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: NULL address", __func__);
return -1;
}
/* Flags. */
if (ifa->ifa_flags & IFA_F_SECONDARY)
SET_FLAG (flags, KROUTE_IFA_SECONDARY);
/* Label */
if (tb[IFA_LABEL])
label = (char *) RTA_DATA (tb[IFA_LABEL]);
if (ifp && label && strcmp (ifp->name, label) == 0)
label = NULL;
/* Register interface address to the interface. */
if (ifa->ifa_family == AF_INET)
{
if (h->nlmsg_type == RTM_NEWADDR)
connected_add_ipv4 (ifp, flags,
(struct in_addr *) addr, ifa->ifa_prefixlen,
(struct in_addr *) broad, label);
else
connected_delete_ipv4 (ifp, flags,
(struct in_addr *) addr, ifa->ifa_prefixlen,
(struct in_addr *) broad);
}
#ifdef HAVE_IPV6
if (ifa->ifa_family == AF_INET6)
{
if (h->nlmsg_type == RTM_NEWADDR)
connected_add_ipv6 (ifp, flags,
(struct in6_addr *) addr, ifa->ifa_prefixlen,
(struct in6_addr *) broad, label);
else
connected_delete_ipv6 (ifp,
(struct in6_addr *) addr, ifa->ifa_prefixlen,
(struct in6_addr *) broad);
}
#endif /* HAVE_IPV6 */
return 0;
}
static int
if_getaddrs (void)
{
int ret;
struct ifaddrs *ifap;
struct ifaddrs *ifapfree;
struct interface *ifp;
int prefixlen;
ret = getifaddrs (&ifap);
if (ret != 0)
{
zlog_err ("getifaddrs(): %s", safe_strerror (errno));
return -1;
}
for (ifapfree = ifap; ifap; ifap = ifap->ifa_next)
{
if (ifap->ifa_addr == NULL)
{
zlog_err ("%s: nonsensical ifaddr with NULL ifa_addr, ifname %s",
__func__, (ifap->ifa_name ? ifap->ifa_name : "(null)"));
continue;
}
ifp = if_lookup_by_name (ifap->ifa_name);
if (ifp == NULL)
{
zlog_err ("if_getaddrs(): Can't lookup interface %s\n",
ifap->ifa_name);
continue;
}
if (ifap->ifa_addr->sa_family == AF_INET)
{
struct sockaddr_in *addr;
struct sockaddr_in *mask;
struct sockaddr_in *dest;
struct in_addr *dest_pnt;
addr = (struct sockaddr_in *) ifap->ifa_addr;
mask = (struct sockaddr_in *) ifap->ifa_netmask;
prefixlen = ip_masklen (mask->sin_addr);
dest_pnt = NULL;
if (ifap->ifa_flags & IFF_POINTOPOINT)
{
dest = (struct sockaddr_in *) ifap->ifa_dstaddr;
dest_pnt = &dest->sin_addr;
}
if (ifap->ifa_flags & IFF_BROADCAST)
{
dest = (struct sockaddr_in *) ifap->ifa_broadaddr;
dest_pnt = &dest->sin_addr;
}
connected_add_ipv4 (ifp, 0, &addr->sin_addr,
prefixlen, dest_pnt, NULL);
}
#ifdef HAVE_IPV6
if (ifap->ifa_addr->sa_family == AF_INET6)
{
struct sockaddr_in6 *addr;
struct sockaddr_in6 *mask;
struct sockaddr_in6 *dest;
struct in6_addr *dest_pnt;
addr = (struct sockaddr_in6 *) ifap->ifa_addr;
mask = (struct sockaddr_in6 *) ifap->ifa_netmask;
prefixlen = ip6_masklen (mask->sin6_addr);
dest_pnt = NULL;
if (ifap->ifa_flags & IFF_POINTOPOINT)
{
if (ifap->ifa_dstaddr)
{
dest = (struct sockaddr_in6 *) ifap->ifa_dstaddr;
dest_pnt = &dest->sin6_addr;
}
}
if (ifap->ifa_flags & IFF_BROADCAST)
{
if (ifap->ifa_broadaddr)
{
dest = (struct sockaddr_in6 *) ifap->ifa_broadaddr;
dest_pnt = &dest->sin6_addr;
}
}
#if defined(KAME)
if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr))
{
addr->sin6_scope_id =
ntohs(*(u_int16_t *)&addr->sin6_addr.s6_addr[2]);
addr->sin6_addr.s6_addr[2] = addr->sin6_addr.s6_addr[3] = 0;
}
#endif
connected_add_ipv6 (ifp, &addr->sin6_addr, prefixlen,
dest_pnt, NULL);
}
#endif /* HAVE_IPV6 */
}
freeifaddrs (ifapfree);
return 0;
}
/* Lookup interface IPv4/IPv6 address. */
int
netlink_interface_addr (struct sockaddr_nl *snl, struct nlmsghdr *h)
{
int len;
struct ifaddrmsg *ifa;
struct rtattr *tb [IFA_MAX + 1];
struct interface *ifp;
void *addr = NULL;
void *broad = NULL;
u_char flags = 0;
char *label = NULL;
ifa = NLMSG_DATA (h);
if (ifa->ifa_family != AF_INET
#ifdef HAVE_IPV6
&& ifa->ifa_family != AF_INET6
#endif /* HAVE_IPV6 */
)
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)
return -1;
memset (tb, 0, sizeof tb);
netlink_parse_rtattr (tb, IFA_MAX, IFA_RTA (ifa), len);
ifp = if_lookup_by_index (ifa->ifa_index);
if (ifp == NULL)
{
zlog_err ("netlink_interface_addr can't find interface by index %d",
ifa->ifa_index);
return -1;
}
if (tb[IFA_ADDRESS] == NULL)
tb[IFA_ADDRESS] = tb[IFA_LOCAL];
if (ifp->flags & IFF_POINTOPOINT)
{
if (tb[IFA_LOCAL])
{
addr = RTA_DATA (tb[IFA_LOCAL]);
if (tb[IFA_ADDRESS])
broad = RTA_DATA (tb[IFA_ADDRESS]);
else
broad = NULL;
}
else
{
if (tb[IFA_ADDRESS])
addr = RTA_DATA (tb[IFA_ADDRESS]);
else
addr = NULL;
}
}
else
{
if (tb[IFA_ADDRESS])
addr = RTA_DATA (tb[IFA_ADDRESS]);
else
addr = NULL;
if (tb[IFA_BROADCAST])
broad = RTA_DATA(tb[IFA_BROADCAST]);
else
broad = NULL;
}
/* Flags. */
if (ifa->ifa_flags & IFA_F_SECONDARY)
SET_FLAG (flags, ZEBRA_IFA_SECONDARY);
/* Label */
if (tb[IFA_LABEL])
label = (char *) RTA_DATA (tb[IFA_LABEL]);
if (ifp && label && strcmp (ifp->name, label) == 0)
label = NULL;
/* Register interface address to the interface. */
if (ifa->ifa_family == AF_INET)
{
if (h->nlmsg_type == RTM_NEWADDR)
connected_add_ipv4 (ifp, flags,
(struct in_addr *) addr, ifa->ifa_prefixlen,
(struct in_addr *) broad, label);
else
connected_delete_ipv4 (ifp, flags,
(struct in_addr *) addr, ifa->ifa_prefixlen,
(struct in_addr *) broad, label);
}
#ifdef HAVE_IPV6
if (ifa->ifa_family == AF_INET6)
{
if (h->nlmsg_type == RTM_NEWADDR)
connected_add_ipv6 (ifp,
(struct in6_addr *) addr, ifa->ifa_prefixlen,
(struct in6_addr *) broad);
else
connected_delete_ipv6 (ifp,
(struct in6_addr *) addr, ifa->ifa_prefixlen,
(struct in6_addr *) broad);
}
#endif /* HAVE_IPV6*/
return 0;
}
/* Retrieve address information for the given ifp */
static int
if_get_addr (struct interface *ifp, struct sockaddr *addr, const char *label)
{
int ret;
struct lifreq lifreq;
struct sockaddr_storage mask, dest;
char *dest_pnt = NULL;
u_char prefixlen = 0;
afi_t af;
int flags = 0;
/* Interface's name and address family.
* We need to use the logical interface name / label, if we've been
* given one, in order to get the right address
*/
strncpy (lifreq.lifr_name, (label ? label : ifp->name), IFNAMSIZ);
/* Interface's address. */
memcpy (&lifreq.lifr_addr, addr, ADDRLEN (addr));
af = addr->sa_family;
/* Point to point or broad cast address pointer init. */
dest_pnt = NULL;
if (AF_IOCTL (af, SIOCGLIFDSTADDR, (caddr_t) & lifreq) >= 0)
{
memcpy (&dest, &lifreq.lifr_dstaddr, ADDRLEN (addr));
if (af == AF_INET)
dest_pnt = (char *) &(SIN (&dest)->sin_addr);
else
dest_pnt = (char *) &(SIN6 (&dest)->sin6_addr);
flags = ZEBRA_IFA_PEER;
}
if (af == AF_INET)
{
ret = if_ioctl (SIOCGLIFNETMASK, (caddr_t) & lifreq);
if (ret < 0)
{
if (errno != EADDRNOTAVAIL)
{
zlog_warn ("SIOCGLIFNETMASK (%s) fail: %s", ifp->name,
safe_strerror (errno));
return ret;
}
return 0;
}
memcpy (&mask, &lifreq.lifr_addr, ADDRLEN (addr));
prefixlen = ip_masklen (SIN (&mask)->sin_addr);
if (!dest_pnt && (if_ioctl (SIOCGLIFBRDADDR, (caddr_t) & lifreq) >= 0))
{
memcpy (&dest, &lifreq.lifr_broadaddr, sizeof (struct sockaddr_in));
dest_pnt = (char *) &SIN (&dest)->sin_addr;
}
}
#ifdef HAVE_IPV6
else if (af == AF_INET6)
{
if (if_ioctl_ipv6 (SIOCGLIFSUBNET, (caddr_t) & lifreq) < 0)
{
if (ifp->flags & IFF_POINTOPOINT)
prefixlen = IPV6_MAX_BITLEN;
else
zlog_warn ("SIOCGLIFSUBNET (%s) fail: %s",
ifp->name, safe_strerror (errno));
}
else
{
prefixlen = lifreq.lifr_addrlen;
}
}
#endif /* HAVE_IPV6 */
/* Set address to the interface. */
if (af == AF_INET)
connected_add_ipv4 (ifp, flags, &SIN (addr)->sin_addr, prefixlen,
(struct in_addr *) dest_pnt, label);
#ifdef HAVE_IPV6
else if (af == AF_INET6)
connected_add_ipv6 (ifp, flags, &SIN6 (addr)->sin6_addr, prefixlen,
(struct in6_addr *) dest_pnt, label);
#endif /* HAVE_IPV6 */
return 0;
}
int
if_getaddrs ()
{
int ret;
struct ifaddrs *ifap;
struct ifaddrs *ifapfree;
struct interface *ifp;
int prefixlen;
ret = getifaddrs (&ifap);
if (ret != 0)
{
#ifdef BRCM_RIP_DEBUG
zlog_err ("getifaddrs(): %s", strerror (errno));
#endif
return -1;
}
for (ifapfree = ifap; ifap; ifap = ifap->ifa_next)
{
ifp = if_lookup_by_name (ifap->ifa_name);
if (ifp == NULL)
{
#ifdef BRCM_RIP_DEBUG
zlog_err ("if_getaddrs(): Can't lookup interface %s\n",
ifap->ifa_name);
#endif
continue;
}
if (ifap->ifa_addr->sa_family == AF_INET)
{
struct sockaddr_in *addr;
struct sockaddr_in *mask;
struct sockaddr_in *dest;
struct in_addr *dest_pnt;
addr = (struct sockaddr_in *) ifap->ifa_addr;
mask = (struct sockaddr_in *) ifap->ifa_netmask;
prefixlen = ip_masklen (mask->sin_addr);
dest_pnt = NULL;
if (ifap->ifa_flags & IFF_POINTOPOINT)
{
dest = (struct sockaddr_in *) ifap->ifa_dstaddr;
dest_pnt = &dest->sin_addr;
}
if (ifap->ifa_flags & IFF_BROADCAST)
{
dest = (struct sockaddr_in *) ifap->ifa_broadaddr;
dest_pnt = &dest->sin_addr;
}
connected_add_ipv4 (ifp, 0, &addr->sin_addr,
prefixlen, dest_pnt, NULL);
}
#ifdef HAVE_IPV6
if (ifap->ifa_addr->sa_family == AF_INET6)
{
struct sockaddr_in6 *addr;
struct sockaddr_in6 *mask;
struct sockaddr_in6 *dest;
struct in6_addr *dest_pnt;
addr = (struct sockaddr_in6 *) ifap->ifa_addr;
mask = (struct sockaddr_in6 *) ifap->ifa_netmask;
prefixlen = ip6_masklen (mask->sin6_addr);
dest_pnt = NULL;
if (ifap->ifa_flags & IFF_POINTOPOINT)
{
if (ifap->ifa_dstaddr)
{
dest = (struct sockaddr_in6 *) ifap->ifa_dstaddr;
dest_pnt = &dest->sin6_addr;
}
}
if (ifap->ifa_flags & IFF_BROADCAST)
{
if (ifap->ifa_broadaddr)
{
dest = (struct sockaddr_in6 *) ifap->ifa_broadaddr;
dest_pnt = &dest->sin6_addr;
}
}
connected_add_ipv6 (ifp, &addr->sin6_addr, prefixlen, dest_pnt);
}
#endif /* HAVE_IPV6 */
}
freeifaddrs (ifapfree);
return 0;
}
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;
zns = zebra_ns_lookup(ns_id);
ifa = NLMSG_DATA(h);
if (ifa->ifa_family != AF_INET && ifa->ifa_family != AF_INET6) {
zlog_warn(
"Invalid address family: %u received from kernel interface addr change: %u",
ifa->ifa_family, 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",
__PRETTY_FUNCTION__,
h->nlmsg_len,
(size_t)NLMSG_LENGTH(sizeof(struct ifaddrmsg)));
return -1;
}
memset(tb, 0, sizeof tb);
netlink_parse_rtattr(tb, IFA_MAX, IFA_RTA(ifa), len);
ifp = if_lookup_by_index_per_ns(zns, ifa->ifa_index);
if (ifp == NULL) {
flog_err(
LIB_ERR_INTERFACE,
"netlink_interface_addr can't find interface by index %d",
ifa->ifa_index);
return -1;
}
if (IS_ZEBRA_DEBUG_KERNEL) /* remove this line to see initial ifcfg */
{
char buf[BUFSIZ];
zlog_debug("netlink_interface_addr %s %s flags 0x%x:",
nl_msg_type_to_str(h->nlmsg_type), ifp->name,
ifa->ifa_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: NULL address", __func__);
return -1;
}
/* Flags. */
if (ifa->ifa_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;
/* 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: %u",
ifa->ifa_prefixlen, 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);
else
connected_delete_ipv4(
ifp, flags, (struct in_addr *)addr,
ifa->ifa_prefixlen, (struct in_addr *)broad);
}
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: %u",
ifa->ifa_prefixlen, 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 (!(ifa->ifa_flags
& (IFA_F_DADFAILED | IFA_F_TENTATIVE)))
connected_add_ipv6(ifp, flags,
(struct in6_addr *)addr,
(struct in6_addr *)broad,
ifa->ifa_prefixlen, label);
} else
connected_delete_ipv6(ifp, (struct in6_addr *)addr,
(struct in6_addr *)broad,
ifa->ifa_prefixlen);
}
return 0;
}