Add better overflow safety in resend

diff --git a/src/dhcpv6.c b/src/dhcpv6.c
index ed6b8f868a67accdad22418e34cfc369204f5347..64c0cb44e90107b184590d6d265e03286c09c8c6 100644 (file)
--- a/src/dhcpv6.c
+++ b/src/dhcpv6.c
@@ -350,14 +350,14 @@ static int64_t dhcpv6_rand_delay(int64_t time)
 {
        int random;
        odhcp6c_random(&random, sizeof(random));
-       return (time * (random % 1000)) / 10000;
+       return (time * ((int64_t)random % 1000LL)) / 10000LL;
 }
 
 
 int dhcpv6_request(enum dhcpv6_msg type)
 {
        uint8_t buf[1536];
-       uint32_t timeout = UINT32_MAX;
+       uint64_t timeout = UINT32_MAX;
        struct dhcpv6_retx *retx = &dhcpv6_retx[type];
 
        if (retx->delay) {
@@ -378,7 +378,7 @@ int dhcpv6_request(enum dhcpv6_msg type)
        if (timeout == 0)
                return -1;
 
-       syslog(LOG_NOTICE, "Sending %s (timeout %us)", retx->name, timeout);
+       syslog(LOG_NOTICE, "Sending %s (timeout %us)", retx->name, (unsigned)timeout);
 
        uint64_t start = odhcp6c_get_milli_time(), round_start = start, elapsed;