From d88e97eade44c39d4b51eef440c3506edb050044 Mon Sep 17 00:00:00 2001 From: Kaspar Schleiser Date: Tue, 4 Mar 2014 16:29:02 +0100 Subject: [PATCH] add option to specify minimum interval for accepting RA or DHCP updates. This was fixed to 60s. Add '-m ' option to change default time. --- src/odhcp6c.c | 13 ++++++++++--- src/odhcp6c.h | 2 ++ 2 files changed, 12 insertions(+), 3 deletions(-) diff --git a/src/odhcp6c.c b/src/odhcp6c.c index dfd9925..798598f 100644 --- a/src/odhcp6c.c +++ b/src/odhcp6c.c @@ -52,6 +52,8 @@ static int urandom_fd = -1, allow_slaac_only = 0; static bool bound = false, release = true; static time_t last_update = 0; +static unsigned int min_update_interval = DEFAULT_MIN_UPDATE_INTERVAL; + int main(_unused int argc, char* const argv[]) { // Allocate ressources @@ -77,7 +79,7 @@ int main(_unused int argc, char* const argv[]) int c; unsigned int client_options = DHCPV6_CLIENT_FQDN | DHCPV6_ACCEPT_RECONFIGURE; - while ((c = getopt(argc, argv, "S::N:V:P:FB:c:i:r:Ru:s:kt:hedp:fa")) != -1) { + while ((c = getopt(argc, argv, "S::N:V:P:FB:c:i:r:Ru:s:kt:m:hedp:fa")) != -1) { switch (c) { case 'S': allow_slaac_only = (optarg) ? atoi(optarg) : -1; @@ -197,6 +199,10 @@ int main(_unused int argc, char* const argv[]) sol_timeout = atoi(optarg); break; + case 'm': + min_update_interval = atoi(optarg); + break; + case 'e': logopt |= LOG_PERROR; break; @@ -447,6 +453,7 @@ static int usage(void) " -f Don't send Client FQDN option\n" " -k Don't send a RELEASE when stopping\n" " -t Maximum timeout for DHCPv6-SOLICIT (3600)\n" + " -m Minimum time between accepting updates (60)\n" "\nInvocation options:\n" " -p Set pidfile (/var/run/odhcp6c.pid)\n" " -d Daemonize\n" @@ -593,10 +600,10 @@ 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 != UINT32_MAX && - new->valid - x->valid < 60 && + new->valid - x->valid < min_update_interval && new->preferred >= x->preferred && new->preferred != UINT32_MAX && - new->preferred - x->preferred < 60 && + new->preferred - x->preferred < min_update_interval && x->class == new->class) return false; x->valid = new->valid; diff --git a/src/odhcp6c.h b/src/odhcp6c.h index e51fa33..285f6b1 100644 --- a/src/odhcp6c.h +++ b/src/odhcp6c.h @@ -31,6 +31,8 @@ #define DHCPV6_REB_MAX_RT 600 #define DHCPV6_INF_MAX_RT 3600 +#define DEFAULT_MIN_UPDATE_INTERVAL 60 + enum dhcvp6_opt { DHCPV6_OPT_CLIENTID = 1, DHCPV6_OPT_SERVERID = 2, -- 2.39.2