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# --- T2-COPYRIGHT-NOTE-BEGIN ---# This copyright note is auto-generated by ./scripts/Create-CopyPatch.# # T2 SDE: package/.../uclibc/add-dns-skipname.patch# Copyright (C) 2004 - 2006 The T2 SDE Project# # More information can be found in the files COPYING and README.# # This patch file is dual-licensed. It is available under the license the# patched project is licensed under, as long as it is an OpenSource license# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms# of the GNU General Public License as published by the Free Software# Foundation; either version 2 of the License, or (at your option) any later# version.# --- T2-COPYRIGHT-NOTE-END ------ uClibc-0.9.27/libc/inet/resolv.c.orig 2005-02-01 11:16:03.000000000 -0800
+++ uClibc-0.9.27/libc/inet/resolv.c 2005-02-01 11:27:30.000000000 -0800
@@ -2543,4 +2543,85 @@
return (len); } libc_hidden_def(ns_name_unpack)+
+#define NS_TYPE_ELT 0x40 /* EDNS0 extended label type */
+#define DNS_LABELTYPE_BITSTRING 0x41
+
+int
+__labellen(const u_char *lp)
+{
+ int bitlen;
+ u_char l = *lp;
+
+ if ((l & NS_CMPRSFLGS) == NS_CMPRSFLGS) {
+ /* should be avoided by the caller */
+ return(-1);
+ }
+
+ if ((l & NS_CMPRSFLGS) == NS_TYPE_ELT) {
+ if (l == DNS_LABELTYPE_BITSTRING) {
+ if ((bitlen = *(lp + 1)) == 0)
+ bitlen = 256;
+ return((bitlen + 7 ) / 8 + 1);
+ }
+ return(-1); /* unknwon ELT */
+ }
+ return(l);
+}
+
+/*
+ * ns_name_skip(ptrptr, eom)
+ * Advance *ptrptr to skip over the compressed name it points at.
+ * return:
+ * 0 on success, -1 (with errno set) on failure.
+ */
+int
+__ns_name_skip(const u_char **ptrptr, const u_char *eom)
+{
+ const u_char *cp;
+ u_int n;
+ int l;
+
+ cp = *ptrptr;
+ while (cp < eom && (n = *cp++) != 0) {
+ /* Check for indirection. */
+ switch (n & NS_CMPRSFLGS) {
+ case 0: /* normal case, n == len */
+ cp += n;
+ continue;
+ case NS_TYPE_ELT: /* EDNS0 extended label */
+ if ((l = __labellen(cp - 1)) < 0) {
+ __set_errno(EMSGSIZE);
+ return(-1);
+ }
+ cp += l;
+ continue;
+ case NS_CMPRSFLGS: /* indirection */
+ cp++;
+ break;
+ default: /* illegal type */
+ __set_errno(EMSGSIZE);
+ return (-1);
+ }
+ break;
+ }
+ if (cp > eom) {
+ __set_errno(EMSGSIZE);
+ return (-1);
+ }
+ *ptrptr = cp;
+ return (0);
+}
+
+/*
+ * Skip over a compressed domain name. Return the size or -1.
+ */
+int
+__dn_skipname(const u_char *ptr, const u_char *eom) {
+ const u_char *saveptr = ptr;
+
+ if (__ns_name_skip(&ptr, eom) == -1)
+ return (-1);
+ return (ptr - saveptr);
+}
#endif /* L_ns_name */
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