diff options
| author | Florian Obser <florian@cvs.openbsd.org> | 2024-07-09 16:15:43 +0000 |
|---|---|---|
| committer | Florian Obser <florian@cvs.openbsd.org> | 2024-07-09 16:15:43 +0000 |
| commit | 65a9a5efc9c9feaf176f6e5d660eb4ba825051bd (patch) | |
| tree | a80d8ded5eaedbf16d086902683360a3300183b9 /sbin | |
| parent | d1b6914e41879a1705ad3b9fc6f3118e489ffe13 (diff) | |
Skip prefixes with vltime 0.
Servers indicate unusable prefixes with vltime 0 when we are in
state reboot and probably hand us new, valid prefixes.
In IPv4 dhcp we would receive a NACK instead...
Diffstat (limited to 'sbin')
| -rw-r--r-- | sbin/dhcp6leased/engine.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/sbin/dhcp6leased/engine.c b/sbin/dhcp6leased/engine.c index 9e457f8bad0..e708f8ea1fd 100644 --- a/sbin/dhcp6leased/engine.c +++ b/sbin/dhcp6leased/engine.c @@ -1,4 +1,4 @@ -/* $OpenBSD: engine.c,v 1.15 2024/07/09 13:27:18 florian Exp $ */ +/* $OpenBSD: engine.c,v 1.16 2024/07/09 16:15:42 florian Exp $ */ /* * Copyright (c) 2017, 2021, 2024 Florian Obser <florian@openbsd.org> @@ -977,18 +977,25 @@ parse_ia_pd_options(uint8_t *p, size_t len, struct prefix *prefix) ntohl(iaprefix.vltime), inet_ntop(AF_INET6, &iaprefix.prefix, ntopbuf, INET6_ADDRSTRLEN), iaprefix.prefix_len); + if (ntohl(iaprefix.vltime) < ntohl(iaprefix.pltime)) { log_warnx("%s: vltime < pltime, ignoring IA_PD", __func__); break; } + if (ntohl(iaprefix.vltime) == 0) { + log_debug("%s: vltime == 0, ignoring IA_PD", + __func__); + break; + } + prefix->prefix = iaprefix.prefix; prefix->prefix_len = iaprefix.prefix_len; prefix->vltime = ntohl(iaprefix.vltime); prefix->pltime = ntohl(iaprefix.pltime); - /* make sure prefix is mask correctly */ + /* make sure prefix is masked correctly */ memset(&mask, 0, sizeof(mask)); in6_prefixlen2mask(&mask, prefix->prefix_len); for (i = 0; i < 16; i++) |