diff options
Diffstat (limited to 'src/ask_resolver.c')
| -rw-r--r-- | src/ask_resolver.c | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/src/ask_resolver.c b/src/ask_resolver.c deleted file mode 100644 index dc7c660..0000000 --- a/src/ask_resolver.c +++ /dev/null @@ -1,140 +0,0 @@ -/* - * Code in examine_result() is taken from official libunbound examples: - * https://nlnetlabs.nl/documentation/unbound/libunbound-tutorial-3/ - * The rest of this file is - * Copyright (C) 2020 by Wojtek Kosior <echo a3dvanR1c0Bwcm90b25tYWlsLmNvbQo= | base64 --decode> - - * Permission to use, copy, modify, and/or distribute this software - * for any purpose with or without fee is hereby granted. - - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH - * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY - * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, - * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM - * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR - * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR - * PERFORMANCE OF THIS SOFTWARE. - */ - -/* - * This is a simple helper program for testing our resolver. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <arpa/inet.h> - -#include <unbound.h> - -/* examine the result structure in detail */ -void examine_result(const char *query, struct ub_result *result) -{ - int i; - int num; - - printf("The query is for: %s\n", query); - printf("The result has:\n"); - printf("qname: %s\n", result->qname); - printf("qtype: %d\n", result->qtype); - printf("qclass: %d\n", result->qclass); - if(result->canonname) - printf("canonical name: %s\n", - result->canonname); - else printf("canonical name: <none>\n"); - - if(result->havedata) - printf("has data\n"); - else printf("has no data\n"); - - if(result->nxdomain) - printf("nxdomain (name does not exist)\n"); - else printf("not an nxdomain (name exists)\n"); - - if(result->secure) - printf("validated to be secure\n"); - else printf("not validated as secure\n"); - - if(result->bogus) - printf("a security failure! (bogus)\n"); - else printf("not a security failure (not bogus)\n"); - - printf("DNS rcode: %d\n", result->rcode); - - if(!result->havedata) - return; - - num = 0; - for(i=0; result->data[i]; i++) { - printf("result data element %d has length %d\n", - i, result->len[i]); - printf("result data element %d is: %s\n", - i, inet_ntoa(*(struct in_addr*)result->data[i])); - num++; - } - printf("result has %d data element(s)\n", num); -} - -struct ub_ctx *create_ub_context(char *forwarder_addr, int debuglevel) -{ - int rc; - struct ub_ctx* ctx; - char *error_message_format; - - ctx = ub_ctx_create(); - if (!ctx) { - fprintf(stderr, "Couldn't create libunbound context.\n"); - return NULL; - } - - error_message_format = "Couldn't set forwarder: %s\n"; - rc = ub_ctx_set_fwd(ctx, forwarder_addr); - if (rc) - goto out; - - error_message_format = "Couldn't set debuglevel: %s\n"; - rc = ub_ctx_debuglevel(ctx, debuglevel); - -out: - if (rc) { - fprintf(stderr, error_message_format, ub_strerror(rc)); - ub_ctx_delete(ctx); - return NULL; - } - - return ctx; -} - -void ztdns_try_resolve(struct ub_ctx *ctx, const char *name) -{ - struct ub_result* result; - int rc; - rc = ub_resolve(ctx, name, - 1 /* TYPE A (IPv4 address) */, - 1 /* CLASS IN (internet) */, &result); - if(rc) - printf("resolve error: %s\n", ub_strerror(rc)); - else { - examine_result(name, result); - ub_resolve_free(result); - } -} - -int main(int argc, char** argv) -{ - struct ub_ctx *ctx; - - if (argc != 3) { - printf("Usage: %s DNS_SERVER DOMAINNAME\n", argv[0]); - return EXIT_FAILURE; - } - - ctx = create_ub_context(argv[1], 3); - if (!ctx) - return EXIT_FAILURE; - - ztdns_try_resolve(ctx, argv[2]); - - ub_ctx_delete(ctx); - - return EXIT_SUCCESS; -} |