dhcpv6: add a minimum valid lifetime for IA_PD updates

[project/odhcp6c.git] / src / odhcp6c.c

diff --git a/src/odhcp6c.c b/src/odhcp6c.c
index 227aef68a6b0d8e0d7d9141078f9e74f30b508d6..808aee8ad29198adf4b4e1d23ccb6187ad2a9723 100644 (file)
--- a/src/odhcp6c.c
+++ b/src/odhcp6c.c
@@ -178,6 +178,7 @@ int main(_unused int argc, char* const argv[])
        struct odhcp6c_opt *opt;
        int ia_pd_iaid_index = 0;
        int sol_timeout = DHCPV6_SOL_MAX_RT;
+       unsigned int ia_pd_safe_valid = 5;
        int verbosity = 0;
        bool help = false, daemonize = false;
        int logopt = LOG_PID;
@@ -186,7 +187,7 @@ int main(_unused int argc, char* const argv[])
        unsigned int ra_options = RA_RDNSS_DEFAULT_LIFETIME;
        unsigned int ra_holdoff_interval = RA_MIN_ADV_INTERVAL;
 
-       while ((c = getopt(argc, argv, "S::N:V:P:FB:c:i:r:Ru:Ux:s:kt:m:Lhedp:fav")) != -1) {
+       while ((c = getopt(argc, argv, "S::N:V:P:FB:c:i:r:Ru:Ux:s:kt:m:D:Lhedp:fav")) != -1) {
                switch (c) {
                case 'S':
                        allow_slaac_only = (optarg) ? atoi(optarg) : -1;
@@ -348,6 +349,12 @@ int main(_unused int argc, char* const argv[])
                        ra_holdoff_interval = atoi(optarg);
                        break;
 
+               case 'D':
+                       ia_pd_safe_valid = atoi(optarg);
+                       if (ia_pd_safe_valid > 60)
+                               ia_pd_safe_valid = 60;
+                       break;
+
                case 'L':
                        ra_options &= ~RA_RDNSS_DEFAULT_LIFETIME;
                        break;
@@ -412,7 +419,7 @@ int main(_unused int argc, char* const argv[])
        signal(SIGUSR2, sighandler);
 
        if ((urandom_fd = open("/dev/urandom", O_CLOEXEC | O_RDONLY)) < 0 ||
-                       init_dhcpv6(ifname, client_options, sol_timeout) ||
+                       init_dhcpv6(ifname, client_options, sol_timeout, ia_pd_safe_valid) ||
                        ra_init(ifname, &ifid, ra_options, ra_holdoff_interval) ||
                        script_init(script, ifname)) {
                syslog(LOG_ERR, "failed to initialize: %s", strerror(errno));
@@ -623,6 +630,7 @@ static int usage(void)
        "       -k              Don't send a RELEASE when stopping\n"
        "       -t <seconds>    Maximum timeout for DHCPv6-SOLICIT (120)\n"
        "       -m <seconds>    Minimum time between accepting RA updates (3)\n"
+       "       -D <seconds>    Minimum valid lifetime for IA_PD updates (5)\n"
        "       -L              Ignore default lifetime for RDNSS records\n"
        "       -U              Ignore Server Unicast option\n"
        "\nInvocation options:\n"