diff options
Diffstat (limited to 'zebra/rtadv.c')
| -rw-r--r-- | zebra/rtadv.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/zebra/rtadv.c b/zebra/rtadv.c index 8cc3c4cb..e8c223f2 100644 --- a/zebra/rtadv.c +++ b/zebra/rtadv.c @@ -233,6 +233,32 @@ rtadv_send_packet (int sock, struct interface *ifp) len += sizeof(struct nd_opt_homeagent_info); } + if (zif->rtadv.AdvRDNSSFlag) + { + char *addr_ptr; + struct nd_opt_rdnss *ndopt_rdnss; + struct prefix *rdnss_prefix; + unsigned int rdnss_entries = 1; + + ndopt_rdnss = (struct nd_opt_rdnss *) (buf + len); + ndopt_rdnss->nd_opt_rdnss_type = ND_OPT_RDNSS; + ndopt_rdnss->nd_opt_rdnss_reserved = 0; + ndopt_rdnss->nd_opt_rdnss_lifetime = htonl(zif->rtadv.AdvRDNSSLifetime); + + len += sizeof(struct nd_opt_rdnss); + + /* Fill in all RDNS server entries */ + for (ALL_LIST_ELEMENTS_RO (zif->rtadv.AdvRDNSSList, node, rdnss_prefix)) + { + addr_ptr = (char *)(buf + len); + memcpy(addr_ptr, &rdnss_prefix->u.prefix6, sizeof (struct in6_addr)); + len += sizeof (struct in6_addr); + rdnss_entries += 2; + } + + ndopt_rdnss->nd_opt_rdnss_len = rdnss_entries; + } + if (zif->rtadv.AdvIntervalOption) { struct nd_opt_adv_interval *ndopt_adv = @@ -1430,6 +1456,115 @@ DEFUN (no_ipv6_nd_router_preference, return CMD_SUCCESS; } +static struct prefix * +rtadv_rdnss_lookup (struct list *list, struct prefix *p) +{ + struct listnode *node; + struct prefix *prefix; + + for (ALL_LIST_ELEMENTS_RO (list, node, prefix)) + if (prefix_same (prefix, p)) + return prefix; + return NULL; +} + +static void +rtadv_rdnss_set (struct zebra_if *zif, struct prefix *p) +{ + struct prefix *prefix; + struct list *rdnsslist = zif->rtadv.AdvRDNSSList; + + prefix = rtadv_rdnss_lookup (rdnsslist, p); + if (prefix) + return; + + prefix = prefix_new (); + memcpy (prefix, p, sizeof (struct prefix)); + listnode_add (rdnsslist, prefix); + + return; +} + +static int +rtadv_rdnss_reset (struct zebra_if *zif, struct prefix *rp) +{ + struct prefix *prefix; + + prefix = rtadv_rdnss_lookup(zif->rtadv.AdvRDNSSList, rp); + if (prefix != NULL) + { + listnode_delete (zif->rtadv.AdvRDNSSList, (void *) prefix); + prefix_free (prefix); + return 1; + } + else + return 0; +} + +DEFUN (ipv6_nd_rdnss, + ipv6_nd_rdnss_cmd, + "ipv6 nd rdnss X:X::X:X (<0-4294967295>|infinite)", + "Interface IPv6 config commands\n" + "Neighbor discovery\n" + "RDNSS Option\n" + "IPv6 address of recursive DNS server\n") +{ + int ret; + char *pnt; + struct interface *ifp; + struct zebra_if *zif; + struct prefix rp; + + ifp = (struct interface *) vty->index; + zif = ifp->info; + + /* make sure no slash exists in the argument */ + pnt = strchr (argv[0], '/'); + if (pnt != NULL) + { + vty_out (vty, "Malformed IPv6 RDNS address - no prefix notation allowed%s", + VTY_NEWLINE); + return CMD_WARNING; + } + + /* now we can abuse str2prefix_ipv6 for a sanity check + * because IPv6 addresses with missing prefix + * slashes '/' are treated as host routes */ + ret = str2prefix_ipv6 (argv[0], (struct prefix_ipv6 *) &rp); + if (!ret) + { + vty_out (vty, "Malformed IPv6 RDNS address%s", VTY_NEWLINE); + return CMD_WARNING; + } + + rtadv_rdnss_set(zif, &rp); + zif->rtadv.AdvRDNSSFlag = 1; + + if (argc > 1) + { + if ( strncmp (argv[1], "i", 1) == 0) + { + zif->rtadv.AdvRDNSSLifetime = RTADV_RDNSS_INFINITY_LIFETIME; + } + else + { + zif->rtadv.AdvRDNSSLifetime = + (u_int32_t) strtoll (argv[1], (char **)NULL, 10); + } + } + + return CMD_SUCCESS; +} + +ALIAS (ipv6_nd_rdnss, + ipv6_nd_rdnss_nolife_cmd, + "ipv6 nd rdnss X:X::X:X", + "Interface IPv6 config commands\n" + "Neighbor discovery\n" + "RDNSS Option\n" + "IPv6 address of recursive DNS server\n") + + /* Write configuration about router advertisement. */ void rtadv_config_write (struct vty *vty, struct interface *ifp) @@ -1605,6 +1740,8 @@ rtadv_init (void) install_element (INTERFACE_NODE, &no_ipv6_nd_prefix_cmd); install_element (INTERFACE_NODE, &ipv6_nd_router_preference_cmd); install_element (INTERFACE_NODE, &no_ipv6_nd_router_preference_cmd); + install_element (INTERFACE_NODE, &ipv6_nd_rdnss_cmd); + install_element (INTERFACE_NODE, &ipv6_nd_rdnss_nolife_cmd); } static int |