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path: root/src/libsystemd-network/dhcp6-option.c
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Diffstat (limited to 'src/libsystemd-network/dhcp6-option.c')
-rw-r--r--src/libsystemd-network/dhcp6-option.c82
1 files changed, 82 insertions, 0 deletions
diff --git a/src/libsystemd-network/dhcp6-option.c b/src/libsystemd-network/dhcp6-option.c
index 693170bf0c..6da7ea7e27 100644
--- a/src/libsystemd-network/dhcp6-option.c
+++ b/src/libsystemd-network/dhcp6-option.c
@@ -26,9 +26,11 @@
#include "sparse-endian.h"
#include "unaligned.h"
#include "util.h"
+#include "strv.h"
#include "dhcp6-internal.h"
#include "dhcp6-protocol.h"
+#include "dns-domain.h"
#define DHCP6_OPTION_IA_NA_LEN 12
#define DHCP6_OPTION_IA_TA_LEN 4
@@ -335,3 +337,83 @@ int dhcp6_option_parse_ip6addrs(uint8_t *optval, uint16_t optlen,
return count;
}
+
+int dhcp6_option_parse_domainname(const uint8_t *optval, uint16_t optlen,
+ char ***str_arr)
+{
+ size_t pos = 0, idx = 0;
+ _cleanup_free_ char **names = NULL;
+ int r;
+
+ assert_return(optlen > 1, -ENODATA);
+ assert_return(optval[optlen] == '\0', -EINVAL);
+
+ while (pos < optlen) {
+ _cleanup_free_ char *ret = NULL;
+ size_t n = 0, allocated = 0;
+ bool first = true;
+
+ for (;;) {
+ uint8_t c;
+
+ c = optval[pos++];
+
+ if (c == 0)
+ /* End of name */
+ break;
+ else if (c <= 63) {
+ _cleanup_free_ char *t = NULL;
+ const char *label;
+
+ /* Literal label */
+ label = (const char *)&optval[pos];
+ pos += c;
+ if (pos > optlen)
+ return -EMSGSIZE;
+
+ r = dns_label_escape(label, c, &t);
+ if (r < 0)
+ goto fail;
+
+ if (!GREEDY_REALLOC0(ret, allocated, n + !first + strlen(t) + 1)) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ if (!first)
+ ret[n++] = '.';
+ else
+ first = false;
+
+ memcpy(ret + n, t, r);
+ n += r;
+ continue;
+ } else {
+ r = -EBADMSG;
+ goto fail;
+ }
+ }
+
+ if (!GREEDY_REALLOC(ret, allocated, n + 1)) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ ret[n] = 0;
+
+ r = strv_extend(&names, ret);
+ if (r < 0)
+ goto fail;
+
+ ret = NULL;
+ idx++;
+ }
+
+ *str_arr = names;
+ names = NULL;
+
+ return idx;
+
+fail:
+ return r;
+}