diff options
| -rw-r--r-- | src/libsystemd-network/ndisc-router.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/libsystemd-network/ndisc-router.c b/src/libsystemd-network/ndisc-router.c index cf56c89d76..845a6b7c6c 100644 --- a/src/libsystemd-network/ndisc-router.c +++ b/src/libsystemd-network/ndisc-router.c @@ -459,6 +459,7 @@ _public_ int sd_ndisc_router_prefix_get_preferred_lifetime(sd_ndisc_router *rt, _public_ int sd_ndisc_router_prefix_get_flags(sd_ndisc_router *rt, uint8_t *ret) { struct nd_opt_prefix_info *pi; + uint8_t flags; int r; assert_return(rt, -EINVAL); @@ -468,7 +469,14 @@ _public_ int sd_ndisc_router_prefix_get_flags(sd_ndisc_router *rt, uint8_t *ret) if (r < 0) return r; - *ret = pi->nd_opt_pi_flags_reserved; + flags = pi->nd_opt_pi_flags_reserved; + + if ((flags & ND_OPT_PI_FLAG_AUTO) && (pi->nd_opt_pi_prefix_len != 64)) { + log_ndisc("Invalid prefix length, ignoring prefix for stateless autoconfiguration."); + flags &= ~ND_OPT_PI_FLAG_AUTO; + } + + *ret = flags; return 0; } |