dhcpv6-ia: update valid_until only for non static DHCPv6 leases
[project/odhcpd.git] / src / dhcpv6-ia.c
index 17294f0..c8786c3 100644 (file)
@@ -141,6 +141,25 @@ static void free_dhcpv6_assignment(struct dhcpv6_assignment *c)
        free(c);
 }
 
+static inline bool valid_addr(const struct odhcpd_ipaddr *addr, time_t now)
+{
+       return (addr->prefix <= 96 && addr->preferred > (uint32_t)now);
+}
+
+static size_t elect_addr(const struct odhcpd_ipaddr *addrs, const size_t addrlen)
+{
+       size_t i, m;
+
+       for (i = 0, m = 0; i < addrlen; ++i) {
+               if (addrs[i].preferred > addrs[m].preferred ||
+                       (addrs[i].preferred == addrs[m].preferred &&
+                        memcmp(&addrs[i].addr, &addrs[m].addr, 16) > 0))
+                       m = i;
+       }
+
+       return m;
+}
+
 static int send_reconf(struct interface *iface, struct dhcpv6_assignment *assign)
 {
        struct {
@@ -252,18 +271,12 @@ void dhcpv6_write_statefile(void)
                                        struct in6_addr addr;
                                        struct odhcpd_ipaddr *addrs = (c->managed) ? c->managed : iface->ia_addr;
                                        size_t addrlen = (c->managed) ? (size_t)c->managed_size : iface->ia_addr_len;
-                                       size_t m = 0;
-
-                                       for (size_t i = 0; i < addrlen; ++i)
-                                               if (addrs[i].preferred > addrs[m].preferred ||
-                                                               (addrs[i].preferred == addrs[m].preferred &&
-                                                                               memcmp(&addrs[i].addr, &addrs[m].addr, 16) > 0))
-                                                       m = i;
+                                       size_t m = elect_addr(addrs, addrlen);
 
                                        for (size_t i = 0; i < addrlen; ++i) {
-                                               if (addrs[i].prefix > 96 || (!INFINITE_VALID(c->valid_until) && c->valid_until <= now) ||
+                                               if (!valid_addr(&addrs[i], now) || (!INFINITE_VALID(c->valid_until) && c->valid_until <= now) ||
                                                                (iface->managed < RELAYD_MANAGED_NO_AFLAG && i != m &&
-                                                                               addrs[i].prefix == 64))
+                                                                               addrs[i].prefix <= 64))
                                                        continue;
 
                                                addr = addrs[i].addr;
@@ -437,7 +450,7 @@ static void managed_handle_pd_data(struct ustream *s, _unused int bytes_new)
 
        if (first && c->managed_size == 0)
                free_dhcpv6_assignment(c);
-       else if (first)
+       else if (first & !(c->flags & OAF_STATIC))
                c->valid_until = now + 150;
 }
 
@@ -447,7 +460,9 @@ static void managed_handle_pd_done(struct ustream *s)
 {
        struct dhcpv6_assignment *c = container_of(s, struct dhcpv6_assignment, managed_sock);
 
-       c->valid_until = odhcpd_time() + 15;
+       if (!(c->flags & OAF_STATIC))
+               c->valid_until = odhcpd_time() + 15;
+
        c->managed_size = 0;
 
        if (c->accept_reconf)
@@ -471,7 +486,10 @@ static bool assign_pd(struct interface *iface, struct dhcpv6_assignment *assign)
                                        iaidbuf, assign->iaid, assign->length);
                        ustream_write_pending(&assign->managed_sock.stream);
                        assign->managed_size = -1;
-                       assign->valid_until = odhcpd_time() + 15;
+
+                       if (!(assign->flags & OAF_STATIC))
+                               assign->valid_until = odhcpd_time() + 15;
+
                        list_add(&assign->head, &iface->ia_assignments);
 
                        /* Wait initial period of up to 250ms for immediate assignment */
@@ -693,20 +711,13 @@ static size_t append_reply(uint8_t *buf, size_t buflen, uint16_t status,
 
                        struct odhcpd_ipaddr *addrs = (a->managed) ? a->managed : iface->ia_addr;
                        size_t addrlen = (a->managed) ? (size_t)a->managed_size : iface->ia_addr_len;
-                       size_t m = 0;
-
-                       for (size_t i = 0; i < addrlen; ++i)
-                               if (addrs[i].preferred > addrs[m].preferred ||
-                                               (addrs[i].preferred == addrs[m].preferred &&
-                                                               memcmp(&addrs[i].addr, &addrs[m].addr, 16) > 0))
-                                       m = i;
+                       size_t m = elect_addr(addrs, addrlen);
 
                        for (size_t i = 0; i < addrlen; ++i) {
                                uint32_t prefix_pref = addrs[i].preferred;
                                uint32_t prefix_valid = addrs[i].valid;
 
-                               if (addrs[i].prefix > 96 ||
-                                               addrs[i].preferred <= (uint32_t)now)
+                               if (!valid_addr(&addrs[i], now))
                                        continue;
 
                                if (prefix_pref != UINT32_MAX)
@@ -797,8 +808,7 @@ static size_t append_reply(uint8_t *buf, size_t buflen, uint16_t status,
                                        size_t addrlen = (a->managed) ? (size_t)a->managed_size : iface->ia_addr_len;
 
                                        for (size_t i = 0; i < addrlen; ++i) {
-                                               if (addrs[i].prefix > 96 ||
-                                                               addrs[i].preferred <= (uint32_t)now)
+                                               if (!valid_addr(&addrs[i], now))
                                                        continue;
 
                                                struct in6_addr addr = addrs[i].addr;
@@ -918,7 +928,7 @@ static void dhcpv6_log(uint8_t msgtype, struct interface *iface, time_t now,
                char addrbuf[INET6_ADDRSTRLEN];
 
                for (size_t i = 0; i < addrlen; ++i) {
-                       if (addrs[i].prefix > 96 || addrs[i].preferred <= (uint32_t)now)
+                       if (!valid_addr(&addrs[i], now))
                                continue;
 
                        struct in6_addr addr = addrs[i].addr;