diff options
| author | Hans Dedecker <hans.dedecker@technicolor.com> | 2015-08-10 18:31:46 +0200 |
|---|---|---|
| committer | Hans Dedecker <dedeckeh@gmail.com> | 2015-08-13 12:02:38 +0200 |
| commit | acce00f87d4887894e5ee3943e490467551c1fe2 (patch) | |
| tree | ae9cd6bb55c526d9ce9c90c44bf8ae46d0079f10 | |
| parent | 56b4e844baad6ea8eaaa6a4442583fa5ffa41bc7 (diff) | |
router: Fix infinite lifetimes
| -rw-r--r-- | src/router.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/src/router.c b/src/router.c index 1a008e1..d7452f5 100644 --- a/src/router.c +++ b/src/router.c @@ -39,6 +39,7 @@ static struct odhcpd_event router_event = {{.fd = -1}, handle_icmpv6}; static FILE *fp_route = NULL; #define RA_IOV_LEN 6 +#define TIME_LEFT(t1, now) ((t1) != UINT32_MAX ? (t1) - (now) : UINT32_MAX) int init_router(void) { @@ -288,15 +289,15 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add } if (addr->preferred > (uint32_t)now && - minvalid > 1000LL * (addr->valid - now)) - minvalid = 1000LL * (addr->valid - now); + minvalid > 1000LL * TIME_LEFT(addr->valid, now)) + minvalid = 1000LL * TIME_LEFT(addr->valid, now); - if (maxvalid < 1000LL * (addr->valid - now)) - maxvalid = 1000LL * (addr->valid - now); + if (maxvalid < 1000LL * TIME_LEFT(addr->valid, now)) + maxvalid = 1000LL * TIME_LEFT(addr->valid, now); if (((addr->addr.s6_addr[0] & 0xfe) != 0xfc || iface->default_router) - && ntohs(adv.h.nd_ra_router_lifetime) < addr->valid - now) - adv.h.nd_ra_router_lifetime = htons(addr->valid - now); + && ntohs(adv.h.nd_ra_router_lifetime) < TIME_LEFT(addr->valid, now)) + adv.h.nd_ra_router_lifetime = htons(TIME_LEFT(addr->valid, now)); odhcpd_bmemcpy(&p->nd_opt_pi_prefix, &addr->addr, (iface->ra_advrouter) ? 128 : addr->prefix); @@ -310,13 +311,13 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add p->nd_opt_pi_flags_reserved |= ND_OPT_PI_FLAG_AUTO; if (iface->ra_advrouter) p->nd_opt_pi_flags_reserved |= ND_OPT_PI_FLAG_RADDR; - p->nd_opt_pi_valid_time = htonl(addr->valid - now); + p->nd_opt_pi_valid_time = htonl(TIME_LEFT(addr->valid, now)); if (addr->preferred > (uint32_t)now) - p->nd_opt_pi_preferred_time = htonl(addr->preferred - now); + p->nd_opt_pi_preferred_time = htonl(TIME_LEFT(addr->preferred, now)); - if (addr->preferred - now > dns_time) { - dns_time = addr->preferred - now; + if (TIME_LEFT(addr->preferred, now) > dns_time) { + dns_time = TIME_LEFT(addr->preferred, now); dns_pref = addr->addr; } } @@ -410,7 +411,7 @@ static uint64_t send_router_advert(struct interface *iface, const struct in6_add routes[routes_cnt].flags |= ND_RA_PREF_LOW; else if (iface->route_preference > 0) routes[routes_cnt].flags |= ND_RA_PREF_HIGH; - routes[routes_cnt].lifetime = htonl(addr->valid - now); + routes[routes_cnt].lifetime = htonl(TIME_LEFT(addr->valid, now)); routes[routes_cnt].addr[0] = addr->addr.s6_addr32[0]; routes[routes_cnt].addr[1] = addr->addr.s6_addr32[1]; routes[routes_cnt].addr[2] = 0; |