+static inline int parseHostUniq(const char *uniq, PPPoETag *tag)
+{
+ unsigned i, len = strlen(uniq);
+
+#define hex(x) \
+ (((x) <= '9') ? ((x) - '0') : \
+ (((x) <= 'F') ? ((x) - 'A' + 10) : \
+ ((x) - 'a' + 10)))
+
+ if (!len || len % 2 || len / 2 > sizeof(tag->payload))
+ return 0;
+
+ for (i = 0; i < len; i += 2) {
+ if (!isxdigit(uniq[i]) || !isxdigit(uniq[i+1]))
+ return 0;
+
+ tag->payload[i / 2] = (char)(hex(uniq[i]) << 4 | hex(uniq[i+1]));
+ }
+
+#undef hex
+
+ tag->type = htons(TAG_HOST_UNIQ);
+ tag->length = htons(len / 2);
+ return 1;
+}
+