+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
#include "macro.h"
#include "alloc-util.h"
+#include "dns-domain.h"
#include "fd-util.h"
#include "icmp6-util.h"
#include "in-addr-util.h"
#include "radv-internal.h"
#include "socket-util.h"
#include "string-util.h"
+#include "strv.h"
#include "util.h"
#include "random-util.h"
}
free(ra->rdnss);
+ free(ra->dnssl);
radv_reset(ra);
.nd_opt_mtu_type = ND_OPT_MTU,
.nd_opt_mtu_len = 1,
};
- /* Reserve iov space for RA header, linkaddr, MTU, N prefixes, RDNSS */
- struct iovec iov[4 + ra->n_prefixes];
+ /* Reserve iov space for RA header, linkaddr, MTU, N prefixes, RDNSS
+ and DNSSL */
+ struct iovec iov[5 + ra->n_prefixes];
struct msghdr msg = {
.msg_name = &dst_addr,
.msg_namelen = sizeof(dst_addr),
msg.msg_iovlen++;
}
+ if (ra->dnssl) {
+ iov[msg.msg_iovlen].iov_base = ra->dnssl;
+ iov[msg.msg_iovlen].iov_len = ra->dnssl->length * 8;
+ msg.msg_iovlen++;
+ }
+
if (sendmsg(ra->fd, &msg, 0) < 0)
return -errno;
return 0;
}
+_public_ int sd_radv_set_dnssl(sd_radv *ra, uint32_t lifetime,
+ char **search_list) {
+ _cleanup_free_ struct sd_radv_opt_dns *opt_dnssl = NULL;
+ size_t len = 0;
+ char **s;
+ uint8_t *p;
+
+ assert_return(ra, -EINVAL);
+
+ if (!search_list || *search_list == NULL) {
+ ra->dnssl = mfree(ra->dnssl);
+
+ return 0;
+ }
+
+ STRV_FOREACH(s, search_list)
+ len += strlen(*s) + 2;
+
+ len = (sizeof(struct sd_radv_opt_dns) + len + 7) & ~0x7;
+
+ opt_dnssl = malloc0(len);
+ if (!opt_dnssl)
+ return -ENOMEM;
+
+ opt_dnssl->type = SD_RADV_OPT_DNSSL;
+ opt_dnssl->length = len / 8;
+ opt_dnssl->lifetime = htobe32(lifetime);
+
+ p = (uint8_t *)(opt_dnssl + 1);
+ len -= sizeof(struct sd_radv_opt_dns);
+
+ STRV_FOREACH(s, search_list) {
+ int r;
+
+ r = dns_name_to_wire_format(*s, p, len, false);
+ if (r < 0)
+ return r;
+
+ if (len < (size_t)r)
+ return -ENOBUFS;
+
+ p += r;
+ len -= r;
+ }
+
+ free(ra->dnssl);
+ ra->dnssl = opt_dnssl;
+ opt_dnssl = NULL;
+
+ return 0;
+}
+
_public_ int sd_radv_prefix_new(sd_radv_prefix **ret) {
_cleanup_(sd_radv_prefix_unrefp) sd_radv_prefix *p = NULL;