Fix T1, T2 and T3 timer values in case of infinite time values

Honor T1, T2 and T3 timer values from DHCPv6 server in case of infinite values

diff --git a/src/dhcpv6.c b/src/dhcpv6.c
index f18a3e946f6d8cbe3b73cb2cba0bac841f8cad01..4b1ba957b21fcbc3d18c0030a0bc2acb915ec07b 100644 (file)
--- a/src/dhcpv6.c
+++ b/src/dhcpv6.c
@@ -474,9 +474,9 @@ int dhcpv6_request(enum dhcpv6_msg type)
        if (type == DHCPV6_MSG_UNKNOWN)
                timeout = t1;
        else if (type == DHCPV6_MSG_RENEW)
-               timeout = (t2 > t1) ? t2 - t1 : 0;
+               timeout = (t2 > t1) ? t2 - t1 : ((t1 == UINT32_MAX) ? UINT32_MAX : 0);
        else if (type == DHCPV6_MSG_REBIND)
-               timeout = (t3 > t2) ? t3 - t2 : 0;
+               timeout = (t3 > t2) ? t3 - t2 : ((t2 == UINT32_MAX) ? UINT32_MAX : 0);
 
        if (timeout == 0)
                return -1;
@@ -514,8 +514,8 @@ int dhcpv6_request(enum dhcpv6_msg type)
                uint64_t round_end = round_start + rto;
                elapsed = round_start - start;
 
-               // Don't wait too long
-               if (round_end - start > timeout * 1000)
+               // Don't wait too long if timeout differs from infinite
+               if ((timeout != UINT32_MAX) && (round_end - start > timeout * 1000))
                        round_end = timeout * 1000 + start;
 
                // Built and send package
@@ -542,9 +542,9 @@ int dhcpv6_request(enum dhcpv6_msg type)
 
                        // Set timeout for receiving
                        uint64_t t = round_end - round_start;
-                       struct timeval timeout = {t / 1000, (t % 1000) * 1000};
+                       struct timeval tv = {t / 1000, (t % 1000) * 1000};
                        setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO,
-                                       &timeout, sizeof(timeout));
+                                       &tv, sizeof(tv));
 
                        // Receive cycle
                        len = recvmsg(sock, &msg, 0);
@@ -589,8 +589,8 @@ int dhcpv6_request(enum dhcpv6_msg type)
                // Allow
                if (retx->handler_finish)
                        len = retx->handler_finish();
-       } while (len < 0 && ((elapsed / 1000 < timeout) && (!retx->max_rc || rc < retx->max_rc)));
-
+       } while (len < 0 && ((timeout == UINT32_MAX) || (elapsed / 1000 < timeout)) && 
+                       (!retx->max_rc || rc < retx->max_rc));
        return len;
 }
 
@@ -861,9 +861,14 @@ static int dhcpv6_handle_reply(enum dhcpv6_msg orig, _unused const int rc,
                uint32_t elapsed = (last_update > 0) ? now - last_update : 0;
                last_update = now;
 
-               t1 -= elapsed;
-               t2 -= elapsed;
-               t3 -= elapsed;
+               if (t1 != UINT32_MAX)
+                       t1 -= elapsed;
+
+               if (t2 != UINT32_MAX)
+                       t2 -= elapsed;
+
+               if (t3 != UINT32_MAX)
+                       t3 -= elapsed;
 
                if (t1 < 0)
                        t1 = 0;

diff --git a/src/odhcp6c.c b/src/odhcp6c.c
index dbe2bdf04528997b0f015b39e66f9c79b0abb5dc..3eb37a7b41b3cd2807dc07ad0538a8f45ccf8df3 100644 (file)
--- a/src/odhcp6c.c
+++ b/src/odhcp6c.c
@@ -592,8 +592,10 @@ bool odhcp6c_update_entry_safe(enum odhcp6c_state state, struct odhcp6c_entry *n
 
        if (new->valid > 0) {
                if (x) {
-                       if (new->valid >= x->valid && new->valid - x->valid < 60 &&
+                       if (new->valid >= x->valid && new->valid != UINT32_MAX &&
+                                       new->valid - x->valid < 60 &&
                                        new->preferred >= x->preferred &&
+                                       new->preferred != UINT32_MAX &&
                                        new->preferred - x->preferred < 60 &&
                                        x->class == new->class)
                                return false;