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authorwbx <wbx@hydrogenium.(none)>2009-05-17 14:41:34 +0200
committerwbx <wbx@hydrogenium.(none)>2009-05-17 14:41:34 +0200
commit219a6dab8995aad9ac4860cc1a84d6f3509a03a4 (patch)
treeb9c0f3c43aebba2fcfef777592d0add39f2072f4 /package/aiccu/extra
Initial import
Diffstat (limited to 'package/aiccu/extra')
-rw-r--r--package/aiccu/extra/common/dn_skipname.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/package/aiccu/extra/common/dn_skipname.c b/package/aiccu/extra/common/dn_skipname.c
new file mode 100644
index 000000000..f2219f335
--- /dev/null
+++ b/package/aiccu/extra/common/dn_skipname.c
@@ -0,0 +1,51 @@
+#include <errno.h>
+#include <resolv.h>
+
+/* Ripped from glibc 2.4 sources. */
+
+/*
+ * 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;
+
+ 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_CMPRSFLGS: /* indirection */
+ cp++;
+ break;
+ default: /* illegal type */
+ errno = EMSGSIZE;
+ return (-1);
+ }
+ break;
+ }
+ if (cp > eom)
+ {
+ errno = EMSGSIZE;
+ return (-1);
+ }
+ *ptrptr = cp;
+ return (0);
+}
+
+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);
+}
+