added walking support for max label length

diff --git a/examples/ldns-walk.c b/examples/ldns-walk.c
index 1b73683a7ccbc31ace312fe560f675bf1d632635..15d7be3ee25c4d33c7cf60a095048990d1077537 100644 (file)
--- a/examples/ldns-walk.c
+++ b/examples/ldns-walk.c
@@ -34,7 +34,9 @@ create_dname_plus_1(ldns_rdf *dname)
        uint8_t labellen;
        size_t pos;
        ldns_status status;
+       size_t i;
        
+       ldns_dname2canonical(dname);
        labellen = ldns_rdf_data(dname)[0];
        if (labellen < 63) {
                wire = malloc(ldns_rdf_size(dname) + 1);
@@ -50,8 +52,27 @@ create_dname_plus_1(ldns_rdf *dname)
                status = ldns_wire2dname(&newdname, wire, ldns_rdf_size(dname) + 1, &pos);
                free(wire);
        } else {
-               fprintf(stderr, "maxlen not supported yet\n");
-               exit(9);
+               wire = malloc(ldns_rdf_size(dname));
+               if (!wire) {
+                       fprintf(stderr, "Malloc error: out of memory?\n");
+                       exit(127);
+               }
+               wire[0] = labellen;
+               memcpy(&wire[1], ldns_rdf_data(dname) + 1, labellen);
+               memcpy(&wire[labellen], ldns_rdf_data(dname) + labellen, ldns_rdf_size(dname) - labellen);
+               i = labellen;
+               while (wire[i] == 255) {
+                       if (i == 0) {
+                               printf("Error, don't know how to add 1 to a label with maximum length and all values on 255\n");
+                               exit(9);
+                       } else {
+                               i--;
+                       }
+               }
+               wire[i] = wire[i] + 1;
+               pos = 0;
+               status = ldns_wire2dname(&newdname, wire, ldns_rdf_size(dname) + 1, &pos);
+               free(wire);
        }
 
        if (status != LDNS_STATUS_OK) {