static struct in6_addr lladdr = IN6ADDR_ANY_INIT;
static unsigned int ra_options = 0;
static unsigned int ra_holdoff_interval = 0;
+static int ra_hoplimit = 0;
+static int ra_mtu = 0;
+static int ra_reachable = 0;
+static int ra_retransmit = 0;
struct {
struct icmp6_hdr hdr;
return opt == end;
}
-int ra_conf_hoplimit(int newvalue)
+static bool ra_set_hoplimit(int val)
{
- static int value = 0;
-
- if (newvalue > 0)
- value = newvalue;
+ if (val > 0 && val != ra_hoplimit) {
+ ra_hoplimit = val;
+ return true;
+ }
- return value;
+ return false;
}
-int ra_conf_mtu(int newvalue)
+static bool ra_set_mtu(int val)
{
- static int value = 0;
+ if (val >= 1280 && val <= 65535 && ra_mtu != val) {
+ ra_mtu = val;
+ return true;
+ }
- if (newvalue >= 1280 && newvalue <= 65535)
- value = newvalue;
+ return false;
+}
+
+static bool ra_set_reachable(int val)
+{
+ if (val > 0 && val <= 3600000 && ra_reachable != val) {
+ ra_reachable = val;
+ return true;
+ }
- return value;
+ return false;
}
-int ra_conf_reachable(int newvalue)
+static bool ra_set_retransmit(int val)
{
- static int value = 0;
+ if (val > 0 && val <= 60000 && ra_retransmit != val) {
+ ra_retransmit = val;
+ return true;
+ }
- if (newvalue > 0 && newvalue <= 3600000)
- value = newvalue;
+ return false;
+}
- return value;
+int ra_get_hoplimit(void)
+{
+ return ra_hoplimit;
}
-int ra_conf_retransmit(int newvalue)
+int ra_get_mtu(void)
{
- static int value = 0;
+ return ra_mtu;
+}
- if (newvalue > 0 && newvalue <= 60000)
- value = newvalue;
+int ra_get_reachable(void)
+{
+ return ra_reachable;
+}
- return value;
+int ra_get_retransmit(void)
+{
+ return ra_retransmit;
}
bool ra_process(void)
0, ra_holdoff_interval);
// Parse hoplimit
- ra_conf_hoplimit(adv->nd_ra_curhoplimit);
+ changed |= ra_set_hoplimit(adv->nd_ra_curhoplimit);
// Parse ND parameters
- ra_conf_reachable(ntohl(adv->nd_ra_reachable));
- ra_conf_retransmit(ntohl(adv->nd_ra_retransmit));
+ changed |= ra_set_reachable(ntohl(adv->nd_ra_reachable));
+ changed |= ra_set_retransmit(ntohl(adv->nd_ra_retransmit));
// Evaluate options
struct icmpv6_opt *opt;
icmpv6_for_each_option(opt, &adv[1], &buf[len]) {
if (opt->type == ND_OPT_MTU) {
uint32_t *mtu = (uint32_t*)&opt->data[2];
- ra_conf_mtu(ntohl(*mtu));
+ changed |= ra_set_mtu(ntohl(*mtu));
} else if (opt->type == ND_OPT_ROUTE_INFORMATION && opt->len <= 3) {
struct icmpv6_opt_route_info *ri = (struct icmpv6_opt_route_info *)opt;