static int16_t pref_to_priority(uint8_t flags)
{
flags = (flags >> 3) & 0x03;
- return (flags == 0x0) ? 1024 : (flags == 0x1) ? 512 :
- (flags == 0x3) ? 2048 : -1;
-}
-
-
-static void update_proc(const char *sect, const char *opt, uint32_t value)
-{
- char buf[64];
- snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/%s/%s/%s", sect, if_name, opt);
-
- int fd = open(buf, O_WRONLY);
- write(fd, buf, snprintf(buf, sizeof(buf), "%u", value));
- close(fd);
+ return (flags == 0x0) ? 512 : (flags == 0x1) ? 384 :
+ (flags == 0x3) ? 640 : -1;
}
return opt == end;
}
+int ra_conf_hoplimit(int newvalue)
+{
+ static int value = 0;
+ if (newvalue > value)
+ value = newvalue;
+ return value;
+}
+
+int ra_conf_mtu(int newvalue)
+{
+ static int value = 0;
+ if (newvalue >= 1280 && newvalue <= 65535)
+ value = newvalue;
+ return value;
+}
+
+int ra_conf_reachable(int newvalue)
+{
+ static int value = 0;
+ if (newvalue > 0 && newvalue <= 3600000)
+ value = newvalue;
+ return value;
+}
+
+int ra_conf_retransmit(int newvalue)
+{
+ static int value = 0;
+ if (newvalue > 0 && newvalue <= 60000)
+ value = newvalue;
+ return value;
+}
+
bool ra_process(void)
{
bool found = false;
while (true) {
struct sockaddr_in6 from;
struct iovec iov = {buf, sizeof(buf)};
- struct msghdr msg = {&from, sizeof(from), &iov, 1,
- cmsg_buf, sizeof(cmsg_buf), 0};
+ struct msghdr msg = {
+ .msg_name = (void *) &from,
+ .msg_namelen = sizeof(from),
+ .msg_iov = &iov,
+ .msg_iovlen = 1,
+ .msg_control = cmsg_buf,
+ .msg_controllen = sizeof(cmsg_buf),
+ .msg_flags = 0
+ };
ssize_t len = recvmsg(sock, &msg, MSG_DONTWAIT);
if (len <= 0)
changed |= odhcp6c_update_entry(STATE_RA_ROUTE, &entry, 0, true);
// Parse hoplimit
- if (adv->nd_ra_curhoplimit)
- update_proc("conf", "hop_limit", adv->nd_ra_curhoplimit);
+ ra_conf_hoplimit(adv->nd_ra_curhoplimit);
// Parse ND parameters
- uint32_t reachable = ntohl(adv->nd_ra_reachable);
- if (reachable > 0 && reachable <= 3600000)
- update_proc("neigh", "base_reachable_time_ms", reachable);
-
- uint32_t retransmit = ntohl(adv->nd_ra_retransmit);
- if (retransmit > 0 && retransmit <= 60000)
- update_proc("neigh", "retrans_time_ms", retransmit);
-
+ ra_conf_reachable(ntohl(adv->nd_ra_reachable));
+ ra_conf_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];
- if (ntohl(*mtu) >= 1280 && ntohl(*mtu) <= 65535)
- update_proc("conf", "mtu", ntohl(*mtu));
+ ra_conf_mtu(ntohl(*mtu));
} else if (opt->type == ND_OPT_ROUTE_INFORMATION && opt->len <= 3) {
entry.router = from.sin6_addr;
entry.target = any;