+bool odhcp6c_is_bound(void)
+{
+ return bound;
+}
+
+
+bool odhcp6c_addr_in_scope(const struct in6_addr *addr)
+{
+ FILE *fd = fopen("/proc/net/if_inet6", "r");
+ int len;
+ char buf[256];
+
+ if (fd == NULL)
+ return false;
+
+ while (fgets(buf, sizeof(buf), fd)) {
+ struct in6_addr inet6_addr;
+ uint32_t flags, dummy;
+ unsigned int i;
+ char name[8], addr_buf[32];
+
+ len = strlen(buf);
+
+ if ((len <= 0) || buf[len - 1] != '\n')
+ return false;
+
+ buf[--len] = '\0';
+
+ if (sscanf(buf, "%s %x %x %x %x %s",
+ addr_buf, &dummy, &dummy, &dummy, &flags, name) != 6)
+ return false;
+
+ if (strcmp(name, ifname) ||
+ (flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE | IFA_F_DEPRECATED)))
+ continue;
+
+ for (i = 0; i < sizeof(addr_buf); i++) {
+ if (!isxdigit(addr_buf[i]) || isupper(addr_buf[i]))
+ return false;
+ }
+
+ memset(&inet6_addr, 0, sizeof(inet6_addr));
+ for (i = 0; i < (sizeof(addr_buf) / 2); i++) {
+ unsigned char byte;
+ static const char hex[] = "0123456789abcdef";
+ byte = ((index(hex, addr_buf[i * 2]) - hex) << 4) |
+ (index(hex, addr_buf[i * 2 + 1]) - hex);
+ inet6_addr.s6_addr[i] = byte;
+ }
+
+ if ((IN6_IS_ADDR_LINKLOCAL(&inet6_addr) == IN6_IS_ADDR_LINKLOCAL(addr)) &&
+ (IN6_IS_ADDR_UNIQUELOCAL(&inet6_addr) == IN6_IS_ADDR_UNIQUELOCAL(addr)))
+ return true;
+ }
+ return false;
+}
+