Add SNTP option support

[odhcp6c.git] / src / dhcpv6.c

diff --git a/src/dhcpv6.c b/src/dhcpv6.c
index f1122bddabbc44333961736a8480fcffb4dfb853..e93d894935122af9cfbbfc3661eed2bff581015c 100644 (file)
--- a/src/dhcpv6.c
+++ b/src/dhcpv6.c
@@ -573,11 +573,13 @@ static int dhcpv6_handle_reply(_unused enum dhcpv6_msg orig,
 
        t1 = t2 = t3 = 86400;
 
-       size_t ia_na_len, dns_len, search_len;
+       size_t ia_na_len, dns_len, search_len, sntp_ip_len, sntp_dns_len;
        uint8_t *ia_na = odhcp6c_get_state(STATE_IA_NA, &ia_na_len);
        uint8_t *ia_end;
        odhcp6c_get_state(STATE_DNS, &dns_len);
        odhcp6c_get_state(STATE_SEARCH, &search_len);
+       odhcp6c_get_state(STATE_SNTP_IP, &sntp_ip_len);
+       odhcp6c_get_state(STATE_SNTP_FQDN, &sntp_dns_len);
 
        // Decrease valid and preferred lifetime of prefixes
        size_t ia_pd_len;
@@ -649,6 +651,20 @@ static int dhcpv6_handle_reply(_unused enum dhcpv6_msg orig,
                        odhcp6c_add_state(STATE_DNS, odata, olen);
                } else if (otype == DHCPV6_OPT_DNS_DOMAIN) {
                        odhcp6c_add_state(STATE_SEARCH, odata, olen);
+               } else if (otype == DHCPV6_OPT_NTP_SERVER) {
+                       uint16_t stype, slen;
+                       uint8_t *sdata;
+                       // Test status and bail if error
+                       dhcpv6_for_each_option(odata, odata + olen,
+                                       stype, slen, sdata) {
+                               if (slen == 16 && (stype == NTP_MC_ADDR ||
+                                               stype == NTP_SRV_ADDR))
+                                       odhcp6c_add_state(STATE_SNTP_IP,
+                                                       sdata, slen);
+                               else if (slen > 0 && stype == NTP_SRV_FQDN)
+                                       odhcp6c_add_state(STATE_SNTP_FQDN,
+                                                       sdata, slen);
+                       }
                } else if (otype == DHCPV6_OPT_INFO_REFRESH && olen >= 4) {
                        uint32_t refresh = ntohl(*((uint32_t*)odata));
                        if (refresh < (uint32_t)t1)
@@ -663,6 +679,10 @@ static int dhcpv6_handle_reply(_unused enum dhcpv6_msg orig,
        if (opt) {
                have_update |= odhcp6c_commit_state(STATE_DNS, dns_len);
                have_update |= odhcp6c_commit_state(STATE_SEARCH, search_len);
+               have_update |= odhcp6c_commit_state(STATE_SNTP_IP,
+                               sntp_ip_len);
+               have_update |= odhcp6c_commit_state(STATE_SNTP_FQDN,
+                               sntp_dns_len);
                size_t new_ia_pd_len, new_ia_na_len;
                odhcp6c_get_state(STATE_IA_PD, &new_ia_pd_len);
                odhcp6c_get_state(STATE_IA_NA, &new_ia_na_len);