#define SD_RADV_MIN_DELAY_BETWEEN_RAS 3
#define SD_RADV_MAX_RA_DELAY_TIME_USEC (500*USEC_PER_MSEC)
+#define SD_RADV_OPT_RDNSS 25
+
enum RAdvState {
SD_RADV_STATE_IDLE = 0,
SD_RADV_STATE_ADVERTISING = 1,
};
typedef enum RAdvState RAdvState;
+struct sd_radv_opt_dns {
+ uint8_t type;
+ uint8_t length;
+ uint16_t reserved;
+ be32_t lifetime;
+} _packed_;
+
struct sd_radv {
unsigned n_ref;
RAdvState state;
unsigned n_prefixes;
LIST_HEAD(sd_radv_prefix, prefixes);
+
+ size_t n_rdnss;
+ struct sd_radv_opt_dns *rdnss;
};
struct sd_radv_prefix {
sd_radv_prefix_unref(p);
}
+ free(ra->rdnss);
+
radv_reset(ra);
sd_radv_detach_event(ra);
.nd_opt_mtu_type = ND_OPT_MTU,
.nd_opt_mtu_len = 1,
};
- /* Reserve iov space for RA header, linkaddr, MTU + N prefixes */
- struct iovec iov[3 + ra->n_prefixes];
+ /* Reserve iov space for RA header, linkaddr, MTU, N prefixes, RDNSS */
+ struct iovec iov[4 + ra->n_prefixes];
struct msghdr msg = {
.msg_name = &dst_addr,
.msg_namelen = sizeof(dst_addr),
msg.msg_iovlen++;
}
+ if (ra->rdnss) {
+ iov[msg.msg_iovlen].iov_base = ra->rdnss;
+ iov[msg.msg_iovlen].iov_len = ra->rdnss->length * 8;
+ msg.msg_iovlen++;
+ }
+
if (sendmsg(ra->fd, &msg, 0) < 0)
return -errno;
return 0;
}
+_public_ int sd_radv_set_rdnss(sd_radv *ra, uint32_t lifetime,
+ const struct in6_addr *dns, size_t n_dns) {
+ _cleanup_free_ struct sd_radv_opt_dns *opt_rdnss = NULL;
+ size_t len;
+
+ assert_return(ra, -EINVAL);
+ assert_return(n_dns < 128, -EINVAL);
+
+ if (!dns || n_dns == 0) {
+ ra->rdnss = mfree(ra->rdnss);
+ ra->n_rdnss = 0;
+
+ return 0;
+ }
+
+ len = sizeof(struct sd_radv_opt_dns) + sizeof(struct in6_addr) * n_dns;
+
+ opt_rdnss = malloc0(len);
+ if (!opt_rdnss)
+ return -ENOMEM;
+
+ opt_rdnss->type = SD_RADV_OPT_RDNSS;
+ opt_rdnss->length = len / 8;
+ opt_rdnss->lifetime = htobe32(lifetime);
+
+ memcpy(opt_rdnss + 1, dns, n_dns * sizeof(struct in6_addr));
+
+ free(ra->rdnss);
+ ra->rdnss = opt_rdnss;
+ opt_rdnss = NULL;
+
+ ra->n_rdnss = n_dns;
+
+ return 0;
+}
+
_public_ int sd_radv_prefix_new(sd_radv_prefix **ret) {
_cleanup_(sd_radv_prefix_unrefp) sd_radv_prefix *p = NULL;
int sd_radv_set_other_information(sd_radv *ra, int other);
int sd_radv_set_preference(sd_radv *ra, unsigned preference);
int sd_radv_add_prefix(sd_radv *ra, sd_radv_prefix *p);
+int sd_radv_set_rdnss(sd_radv *ra, uint32_t lifetime,
+ const struct in6_addr *dns, size_t n_dns);
/* Advertised prefixes */
int sd_radv_prefix_new(sd_radv_prefix **ret);