for (size_t i = 0; i < n_prefixes; i++) {
struct dhcpv6_ia_hdr hdr_ia_pd = {
htons(DHCPV6_OPT_IA_PD),
- htons(sizeof(hdr_ia_pd) - 4 + sizeof(struct dhcpv6_ia_prefix)),
+ htons(sizeof(hdr_ia_pd) - 4 +
+ sizeof(struct dhcpv6_ia_prefix) * !!request_prefixes[i].length),
request_prefixes[i].iaid, 0, 0
};
struct dhcpv6_ia_prefix pref = {
.type = htons(DHCPV6_OPT_IA_PREFIX),
- .len = htons(25), .prefix = request_prefixes[i].length
+ .len = htons(sizeof(pref) - 4),
+ .prefix = request_prefixes[i].length
};
memcpy(ia_pd + ia_pd_len, &hdr_ia_pd, sizeof(hdr_ia_pd));
ia_pd_len += sizeof(hdr_ia_pd);
- memcpy(ia_pd + ia_pd_len, &pref, sizeof(pref));
- ia_pd_len += sizeof(pref);
+ if (request_prefixes[i].length) {
+ memcpy(ia_pd + ia_pd_len, &pref, sizeof(pref));
+ ia_pd_len += sizeof(pref);
+ }
}
} else {
struct odhcp6c_entry *e = odhcp6c_get_state(STATE_IA_PD, &ia_pd_entries);