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Don't overflow router lifetime
[project/odhcpd.git]
/
src
/
router.c
diff --git
a/src/router.c
b/src/router.c
index
526f9c2
..
74d8a09
100644
(file)
--- a/
src/router.c
+++ b/
src/router.c
@@
-292,10
+292,13
@@
static uint64_t send_router_advert(struct interface *iface, const struct in6_add
minvalid > 1000LL * TIME_LEFT(addr->valid, now))
minvalid = 1000LL * TIME_LEFT(addr->valid, now);
minvalid > 1000LL * TIME_LEFT(addr->valid, now))
minvalid = 1000LL * TIME_LEFT(addr->valid, now);
+ uint32_t this_lifetime = TIME_LEFT(addr->valid, now);
+ if (this_lifetime > UINT16_MAX)
+ this_lifetime = UINT16_MAX;
if (((addr->addr.s6_addr[0] & 0xfe) != 0xfc || iface->default_router)
&& adv.h.nd_ra_router_lifetime
if (((addr->addr.s6_addr[0] & 0xfe) != 0xfc || iface->default_router)
&& adv.h.nd_ra_router_lifetime
- && ntohs(adv.h.nd_ra_router_lifetime) <
TIME_LEFT(addr->valid, now)
)
- adv.h.nd_ra_router_lifetime = htons(
TIME_LEFT(addr->valid, now)
);
+ && ntohs(adv.h.nd_ra_router_lifetime) <
this_lifetime
)
+ adv.h.nd_ra_router_lifetime = htons(
this_lifetime
);
odhcpd_bmemcpy(&p->nd_opt_pi_prefix, &addr->addr,
(iface->ra_advrouter) ? 128 : addr->prefix);
odhcpd_bmemcpy(&p->nd_opt_pi_prefix, &addr->addr,
(iface->ra_advrouter) ? 128 : addr->prefix);