Merge pull request #63 from willmo/router-lifetime

[project/odhcpd.git] / src / router.c

diff --git a/src/router.c b/src/router.c
index 9c9b55a..74d8a09 100644 (file)
--- a/src/router.c
+++ b/src/router.c
@@ -247,7 +247,6 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add
        struct odhcpd_ipaddr addrs[8];
        ssize_t ipcnt = 0;
        int64_t minvalid = INT64_MAX;
-       int64_t maxvalid = 0;
 
        // If not shutdown
        if (iface->timer_rs.cb) {
@@ -293,12 +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);
 
-               if (maxvalid < 1000LL * TIME_LEFT(addr->valid, now))
-                       maxvalid = 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)
-                               && ntohs(adv.h.nd_ra_router_lifetime) < TIME_LEFT(addr->valid, now))
-                       adv.h.nd_ra_router_lifetime = htons(TIME_LEFT(addr->valid, now));
+                               && adv.h.nd_ra_router_lifetime
+                               && 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);
@@ -319,7 +319,7 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add
                        p->nd_opt_pi_valid_time = 0;
        }
 
-       if (!iface->default_router && ntohs(adv.h.nd_ra_router_lifetime) == 1) {
+       if (!iface->default_router && adv.h.nd_ra_router_lifetime == htons(1)) {
                syslog(LOG_WARNING, "A default route is present but there is no public prefix "
                                "on %s thus we don't announce a default route!", iface->ifname);
                adv.h.nd_ra_router_lifetime = 0;
@@ -433,7 +433,7 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add
 
        minival = (maxival * 3) / 4;
 
-       search->lifetime = htonl(maxvalid / 1000);
+       search->lifetime = htonl(maxival / 100);
        dns.lifetime = search->lifetime;
 
        odhcpd_urandom(&msecs, sizeof(msecs));