int
main(int argc, char *argv[])
{
ldns_resolver *res;
ldns_rdf *name;
ldns_rdf *version, *id;
ldns_pkt *p;
ldns_rr_list *addr;
ldns_rr_list *info;
ldns_status s;
ldns_rdf *pop;
size_t i;
if (argc != 2) {
usage(stdout, argv[0]);
exit(EXIT_FAILURE);
} else {
/* create a rdf from the command line arg */
name = ldns_dname_new_frm_str(argv[1]);
if (!name) {
usage(stdout, argv[0]);
exit(EXIT_FAILURE);
}
}
/* create rdf for what we are going to ask */
version = ldns_dname_new_frm_str("version.bind");
id = ldns_dname_new_frm_str("hostname.bind");
/* create a new resolver from /etc/resolv.conf */
s = ldns_resolver_new_frm_file(&res, NULL);
if (s != LDNS_STATUS_OK) {
ldns_rdf_deep_free(name);
exit(EXIT_FAILURE);
}
ldns_resolver_set_retry(res, 1); /* don't want to wait too long */
/* use the resolver to send it a query for the a/aaaa of name */
addr = ldns_get_rr_list_addr_by_name(res, name, LDNS_RR_CLASS_IN, LDNS_RD);
if (!addr) {
fprintf(stderr, " *** could not get an address for %s\n", argv[1]);
ldns_rdf_deep_free(name);
ldns_resolver_deep_free(res);
exit(EXIT_FAILURE);
}
/* remove current list of nameservers from resolver */
while((pop = ldns_resolver_pop_nameserver(res))) { ldns_rdf_deep_free(pop); }
/* can be multihomed */
for(i = 0; i < ldns_rr_list_rr_count(addr); i++) {
if (i > 0) {
fprintf(stdout, "\n");
}
if (ldns_resolver_push_nameserver_rr(res,
ldns_rr_list_rr(addr, i)) != LDNS_STATUS_OK) {
printf("Error adding nameserver to resolver\n");
}
ldns_rr_print(stdout, ldns_rr_list_rr(addr, i));
fprintf(stdout, "\n");
p = ldns_resolver_query(res, version, LDNS_RR_TYPE_TXT,
LDNS_RR_CLASS_CH, LDNS_RD);
if (p) {
ldns_pkt_print(stdout, p);
info = ldns_pkt_rr_list_by_type(p,
LDNS_RR_TYPE_TXT, LDNS_SECTION_ANSWER);
if (info) {
ldns_rr_list_print(stdout, info);
ldns_rr_list_deep_free(info);
} else {
printf(" *** version retrieval failed\n");
}
ldns_pkt_free(p);
} else {
printf(" *** query failed\n");
}
p = ldns_resolver_query(res, id, LDNS_RR_TYPE_TXT,
LDNS_RR_CLASS_CH, LDNS_RD);
if (p) {
info = ldns_pkt_rr_list_by_type(p,
LDNS_RR_TYPE_TXT, LDNS_SECTION_ANSWER);
if (info) {
ldns_rr_list_print(stdout, info);
ldns_rr_list_deep_free(info);
} else {
printf(" *** id retrieval failed\n");
}
ldns_pkt_free(p);
} else {
printf(" *** query failed for\n");
}
ldns_rdf_deep_free(ldns_resolver_pop_nameserver(res));
}
ldns_rdf_deep_free(name);
ldns_resolver_deep_free(res);
exit(EXIT_SUCCESS);
}
static ldns_rr_list *
retrieve_dnskeys(ldns_resolver *local_res, ldns_rdf *name, ldns_rr_type t,
ldns_rr_class c, ldns_rr_list *dns_root)
{
ldns_resolver *res;
ldns_pkt *p;
ldns_rr_list *new_nss_a;
ldns_rr_list *new_nss_aaaa;
ldns_rr_list *final_answer;
ldns_rr_list *new_nss;
ldns_rr_list *ns_addr;
ldns_rr_list *ns_addr2;
uint16_t loop_count;
ldns_rdf *pop;
ldns_status status;
size_t i;
size_t nss_i;
ldns_rr_list *answer_list = NULL;
ldns_rr_list *authority_list = NULL;
size_t last_nameserver_count;
ldns_rdf **last_nameservers;
loop_count = 0;
new_nss_a = NULL;
new_nss_aaaa = NULL;
new_nss = NULL;
ns_addr = NULL;
ns_addr2 = NULL;
final_answer = NULL;
p = ldns_pkt_new();
res = ldns_resolver_new();
if (!p || !res) {
fprintf(stderr, "Memory allocation failed");
return NULL;
}
if (verbosity >= 2) {
printf("Finding dnskey data for zone: ");
ldns_rdf_print(stdout, name);
printf("\n\n");
}
/* transfer some properties of local_res to res,
* because they were given on the commandline */
ldns_resolver_set_ip6(res,
ldns_resolver_ip6(local_res));
ldns_resolver_set_port(res,
ldns_resolver_port(local_res));
ldns_resolver_set_debug(res,
ldns_resolver_debug(local_res));
ldns_resolver_set_dnssec(res,
ldns_resolver_dnssec(local_res));
ldns_resolver_set_fail(res,
ldns_resolver_fail(local_res));
ldns_resolver_set_usevc(res,
ldns_resolver_usevc(local_res));
ldns_resolver_set_random(res,
ldns_resolver_random(local_res));
ldns_resolver_set_recursive(res, false);
/* setup the root nameserver in the new resolver */
status = ldns_resolver_push_nameserver_rr_list(res, dns_root);
if (status != LDNS_STATUS_OK) {
fprintf(stderr, "Error setting root nameservers in resolver: %s\n", ldns_get_errorstr_by_id(status));
return NULL;
}
ldns_pkt_free(p);
status = ldns_resolver_send(&p, res, name, t, c, 0);
if (status != LDNS_STATUS_OK) {
fprintf(stderr, "Error querying root servers: %s\n", ldns_get_errorstr_by_id(status));
return NULL;
}
if (ldns_pkt_get_rcode(p) != LDNS_RCODE_NOERROR) {
printf("Error in packet:\n");
ldns_pkt_print(stdout, p);
return NULL;
}
if (verbosity >= 4) {
ldns_pkt_print(stdout, p);
printf("\n\n");
}
/* from now on, use TCP */
ldns_resolver_set_usevc(res, true);
while(status == LDNS_STATUS_OK &&
ldns_pkt_reply_type(p) == LDNS_PACKET_REFERRAL) {
if (verbosity >= 3) {
printf("This is a delegation!\n\n");
}
if (address_family == 0 || address_family == 1) {
new_nss_a = ldns_pkt_rr_list_by_type(p,
LDNS_RR_TYPE_A, LDNS_SECTION_ADDITIONAL);
} else {
new_nss_a = ldns_rr_list_new();
}
if (address_family == 0 || address_family == 2) {
new_nss_aaaa = ldns_pkt_rr_list_by_type(p,
LDNS_RR_TYPE_AAAA, LDNS_SECTION_ADDITIONAL);
} else {
new_nss_aaaa = ldns_rr_list_new();
}
new_nss = ldns_pkt_rr_list_by_type(p,
LDNS_RR_TYPE_NS, LDNS_SECTION_AUTHORITY);
/* remove the old nameserver from the resolver */
while((pop = ldns_resolver_pop_nameserver(res))) { ldns_rdf_deep_free(pop); }
/* also check for new_nss emptyness */
if (!new_nss_aaaa && !new_nss_a) {
/*
* no nameserver found!!!
* try to resolve the names we do got
*/
if (verbosity >= 3) {
printf("Did not get address record for nameserver, doing seperate query.\n");
}
ns_addr = ldns_rr_list_new();
for(i = 0; (size_t) i < ldns_rr_list_rr_count(new_nss); i++) {
/* get the name of the nameserver */
pop = ldns_rr_rdf(ldns_rr_list_rr(new_nss, i), 0);
if (!pop) {
break;
}
/* retrieve it's addresses */
ns_addr2 = ldns_get_rr_list_addr_by_name(local_res, pop, c, 0);
if (!ldns_rr_list_cat(ns_addr, ns_addr2)) {
fprintf(stderr, "Internal error adding nameserver address.\n");
exit(EXIT_FAILURE);
}
ldns_rr_list_free(ns_addr2);
}
if (ns_addr) {
if (ldns_resolver_push_nameserver_rr_list(res, ns_addr) !=
LDNS_STATUS_OK) {
fprintf(stderr, "Error adding new nameservers");
ldns_pkt_free(p);
return NULL;
}
ldns_rr_list_deep_free(ns_addr);
} else {
ldns_rr_list_print(stdout, ns_addr);
fprintf(stderr, "Could not find the nameserver ip addr; abort");
ldns_pkt_free(p);
return NULL;
}
}
/* normally, the first working ns is used, but we need all now, so do it one by one
* if the answer is null, take it from the next resolver
* if the answer is not, compare it to that of the next resolver
* error if different, continue if the same
* if answer list null and no resolvers left die.
*/
ldns_rr_list_deep_free(answer_list);
ldns_rr_list_deep_free(authority_list);
answer_list = NULL;
authority_list = NULL;
for (nss_i = 0; nss_i < ldns_rr_list_rr_count(new_nss_aaaa); nss_i++) {
while((pop = ldns_resolver_pop_nameserver(res))) { ldns_rdf_deep_free(pop); }
status = ldns_resolver_push_nameserver(res, ldns_rr_rdf(ldns_rr_list_rr(new_nss_aaaa, nss_i), 0));
if (status != LDNS_STATUS_OK) {
fprintf(stderr, "Error adding nameserver to resolver: %s\n", ldns_get_errorstr_by_id(status));
}
if (verbosity >= 1) {
fprintf(stdout, "Querying nameserver: ");
ldns_rdf_print(stdout, ldns_rr_owner(ldns_rr_list_rr(new_nss_aaaa, nss_i)));
fprintf(stdout, " (");
ldns_rdf_print(stdout, ldns_rr_rdf(ldns_rr_list_rr(new_nss_aaaa, nss_i), 0));
fprintf(stdout, ")\n");
}
status = ldns_resolver_push_nameserver(res, ldns_rr_rdf(ldns_rr_list_rr(new_nss_aaaa, nss_i), 0));
if (status != LDNS_STATUS_OK) {
fprintf(stderr, "Error adding nameserver to resolver: %s\n", ldns_get_errorstr_by_id(status));
}
ldns_pkt_free(p);
status = ldns_resolver_send(&p, res, name, t, c, 0);
if (status == LDNS_STATUS_OK && p) {
if (ldns_pkt_get_rcode(p) != LDNS_RCODE_NOERROR) {
printf("Error in packet:\n");
ldns_pkt_print(stdout, p);
return NULL;
}
if (verbosity >= 4) {
ldns_pkt_print(stdout, p);
printf("\n\n");
}
if (answer_list) {
if (verbosity >= 2) {
printf("Comparing answer list of answer to previous\n\n");
}
ldns_rr_list_sort(ldns_pkt_answer(p));
ldns_rr_list_sort(answer_list);
if (ldns_rr_list_compare(answer_list, ldns_pkt_answer(p)) != 0) {
fprintf(stderr, "ERROR: different answer answer from nameserver\n");
fprintf(stderr, "\nI had (from previous servers):\n");
ldns_rr_list_print(stderr, answer_list);
fprintf(stderr, "\nI received (from nameserver at ");
ldns_rdf_print(stderr, ldns_resolver_nameservers(res)[0]);
fprintf(stderr, "):\n");
ldns_rr_list_print(stderr, ldns_pkt_answer(p));
exit(EXIT_FAILURE);
}
} else {
answer_list = ldns_rr_list_clone(ldns_pkt_answer(p));
ldns_rr_list_sort(answer_list);
if (verbosity >= 2) {
printf("First answer list for this set, nothing to compare with\n\n");
}
}
if (authority_list) {
if (verbosity >= 2) {
printf("Comparing authority list of answer to previous\n\n");
}
ldns_rr_list_sort(ldns_pkt_authority(p));
ldns_rr_list_sort(authority_list);
if (ldns_rr_list_compare(authority_list, ldns_pkt_authority(p)) != 0) {
fprintf(stderr, "ERROR: different authority answer from nameserver\n");
fprintf(stderr, "\nI had (from previous servers):\n");
ldns_rr_list_print(stderr, authority_list);
fprintf(stderr, "\nI received (from nameserver at ");
ldns_rdf_print(stderr, ldns_resolver_nameservers(res)[0]);
fprintf(stderr, "):\n");
ldns_rr_list_print(stderr, ldns_pkt_authority(p));
exit(EXIT_FAILURE);
}
} else {
authority_list = ldns_rr_list_clone(ldns_pkt_authority(p));
ldns_rr_list_sort(authority_list);
if (verbosity >= 2) {
printf("First authority list for this set, nothing to compare with\n\n");
}
if (verbosity >= 3) {
printf("NS RRset:\n");
ldns_rr_list_print(stdout, authority_list);
printf("\n");
}
}
}
}
ldns_rr_list_deep_free(answer_list);
ldns_rr_list_deep_free(authority_list);
answer_list = NULL;
authority_list = NULL;
for (nss_i = 0; nss_i < ldns_rr_list_rr_count(new_nss_a); nss_i++) {
while((pop = ldns_resolver_pop_nameserver(res))) {ldns_rdf_deep_free(pop); }
if (verbosity >= 1) {
fprintf(stdout, "Querying nameserver: ");
ldns_rdf_print(stdout, ldns_rr_owner(ldns_rr_list_rr(new_nss_a, nss_i)));
fprintf(stdout, " (");
ldns_rdf_print(stdout, ldns_rr_rdf(ldns_rr_list_rr(new_nss_a, nss_i), 0));
fprintf(stdout, ")\n");
}
status = ldns_resolver_push_nameserver(res, ldns_rr_rdf(ldns_rr_list_rr(new_nss_a, nss_i), 0));
if (status != LDNS_STATUS_OK) {
fprintf(stderr, "Error adding nameserver to resolver: %s\n", ldns_get_errorstr_by_id(status));
}
ldns_pkt_free(p);
status = ldns_resolver_send(&p, res, name, t, c, 0);
if (status == LDNS_STATUS_OK) {
if (ldns_pkt_get_rcode(p) != LDNS_RCODE_NOERROR) {
printf("Error in packet:\n");
ldns_pkt_print(stdout, p);
return NULL;
}
if (verbosity >= 4) {
ldns_pkt_print(stdout, p);
printf("\n\n");
}
if (answer_list) {
if (verbosity >= 2) {
printf("Comparing answer list of answer to previous\n\n");
}
ldns_rr_list_sort(ldns_pkt_answer(p));
ldns_rr_list_sort(answer_list);
if (ldns_rr_list_compare(answer_list, ldns_pkt_answer(p)) != 0) {
fprintf(stderr, "ERROR: different answer answer from nameserver\n");
fprintf(stderr, "\nI had (from previous servers):\n");
ldns_rr_list_print(stderr, answer_list);
fprintf(stderr, "\nI received (from nameserver at ");
ldns_rdf_print(stderr, ldns_resolver_nameservers(res)[0]);
fprintf(stderr, "):\n");
ldns_rr_list_print(stderr, ldns_pkt_answer(p));
exit(EXIT_FAILURE);
}
} else {
if (verbosity >= 2) {
printf("First answer list for this set, nothing to compare with\n\n");
}
answer_list = ldns_rr_list_clone(ldns_pkt_answer(p));
ldns_rr_list_sort(answer_list);
}
if (authority_list) {
if (verbosity >= 2) {
printf("Comparing authority list of answer to previous\n\n");
}
ldns_rr_list_sort(ldns_pkt_authority(p));
ldns_rr_list_sort(authority_list);
if (ldns_rr_list_compare(authority_list, ldns_pkt_authority(p)) != 0) {
fprintf(stderr, "ERROR: different authority answer from nameserver\n");
fprintf(stderr, "\nI had (from previous servers):\n");
ldns_rr_list_print(stderr, authority_list);
fprintf(stderr, "\nI received (from nameserver at ");
ldns_rdf_print(stderr, ldns_resolver_nameservers(res)[0]);
fprintf(stderr, "):\n");
ldns_rr_list_print(stderr, ldns_pkt_authority(p));
exit(EXIT_FAILURE);
}
} else {
if (verbosity >= 2) {
printf("First authority list for this set, nothing to compare with\n\n");
}
authority_list = ldns_rr_list_clone(ldns_pkt_authority(p));
ldns_rr_list_sort(authority_list);
if (verbosity >= 3) {
printf("NS RRset:\n");
ldns_rr_list_print(stdout, authority_list);
printf("\n");
}
}
}
}
ldns_rr_list_deep_free(authority_list);
authority_list = NULL;
if (loop_count++ > 20) {
/* unlikely that we are doing something usefull */
fprintf(stderr, "Looks like we are looping");
ldns_pkt_free(p);
return NULL;
}
ldns_pkt_free(p);
if (verbosity >= 3) {
fprintf(stdout, "This level ok. Continuing to next.\n\n");
}
status = ldns_resolver_send(&p, res, name, t, c, 0);
if (status != LDNS_STATUS_OK) {
fprintf(stderr, "Error querying root servers: %s\n", ldns_get_errorstr_by_id(status));
return NULL;
}
if (ldns_pkt_get_rcode(p) != LDNS_RCODE_NOERROR) {
printf("Error in packet:\n");
ldns_pkt_print(stdout, p);
return NULL;
}
if (verbosity >= 4) {
ldns_pkt_print(stdout, p);
printf("\n\n");
}
ldns_rr_list_deep_free(new_nss_aaaa);
ldns_rr_list_deep_free(new_nss_a);
ldns_rr_list_deep_free(new_nss);
new_nss_aaaa = NULL;
new_nss_a = NULL;
ns_addr = NULL;
}
ldns_rr_list_deep_free(answer_list);
answer_list = NULL;
/* clone the nameserver list, we are going to handle them one by one */
last_nameserver_count = 0;
last_nameservers = LDNS_XMALLOC(ldns_rdf *, ldns_resolver_nameserver_count(res));
pop = NULL;
while((pop = ldns_resolver_pop_nameserver(res))) {
last_nameservers[last_nameserver_count] = pop;
last_nameserver_count++;
}
for (nss_i = 0; nss_i < last_nameserver_count; nss_i++) {
/* remove previous nameserver */
while((pop = ldns_resolver_pop_nameserver(res))) { ldns_rdf_deep_free(pop); }
if (verbosity >= 1) {
printf("Querying nameserver: ");
ldns_rdf_print(stdout, last_nameservers[nss_i]);
printf("\n");
}
status = ldns_resolver_push_nameserver(res, last_nameservers[nss_i]);
if (status != LDNS_STATUS_OK) {
fprintf(stderr, "Error adding nameserver to resolver: %s\n", ldns_get_errorstr_by_id(status));
}
ldns_pkt_free(p);
status = ldns_resolver_send(&p, res, name, t, c, 0);
if (!p) {
fprintf(stderr, "no packet received\n");
return NULL;
}
if (status == LDNS_STATUS_RES_NO_NS) {
fprintf(stderr, "Error: nameserver at ");
ldns_rdf_print(stderr, last_nameservers[nss_i]);
fprintf(stderr, " not responding. Unable to check RRset here, aborting.\n");
return NULL;
}
if (ldns_pkt_get_rcode(p) != LDNS_RCODE_NOERROR) {
printf("Error in packet:\n");
ldns_pkt_print(stdout, p);
return NULL;
}
if (answer_list) {
if (verbosity >= 2) {
printf("1Comparing answer rr list of answer to previous\n");
}
ldns_rr_list_sort(ldns_pkt_answer(p));
ldns_rr_list_sort(answer_list);
if (ldns_rr_list_compare(answer_list, ldns_pkt_answer(p)) != 0) {
printf("ERROR: different answer section in response from nameserver\n");
fprintf(stderr, "\nI had:\n");
ldns_rr_list_print(stderr, answer_list);
fprintf(stderr, "\nI received (from nameserver at ");
ldns_rdf_print(stderr, ldns_resolver_nameservers(res)[0]);
fprintf(stderr, "):\n");
ldns_rr_list_print(stderr, ldns_pkt_answer(p));
exit(EXIT_FAILURE);
}
} else {
if (verbosity >= 2) {
printf("First answer rr list for this set, nothing to compare with\n");
}
answer_list = ldns_rr_list_clone(ldns_pkt_answer(p));
if (verbosity >= 3) {
printf("DNSKEY RRset:\n");
ldns_rr_list_print(stdout, answer_list);
}
}
}
for (nss_i = 0; nss_i < last_nameserver_count; nss_i++) {
ldns_rdf_deep_free(last_nameservers[nss_i]);
}
LDNS_FREE(last_nameservers);
ldns_resolver_deep_free(res);
ldns_pkt_free(p);
return answer_list;
}
/**
* Main function of drill
* parse the arguments and prepare a query
*/
int
main(int argc, char *argv[])
{
ldns_resolver *res = NULL;
ldns_resolver *cmdline_res = NULL; /* only used to resolv @name names */
ldns_rr_list *cmdline_rr_list = NULL;
ldns_rdf *cmdline_dname = NULL;
ldns_rdf *qname, *qname_tmp;
ldns_pkt *pkt;
ldns_pkt *qpkt;
char *serv;
const char *name;
char *name2;
char *progname;
char *query_file = NULL;
char *answer_file = NULL;
ldns_buffer *query_buffer = NULL;
ldns_rdf *serv_rdf;
ldns_rr_type type;
ldns_rr_class clas;
#if 0
ldns_pkt_opcode opcode = LDNS_PACKET_QUERY;
#endif
int i, c;
int int_type;
int int_clas;
int PURPOSE;
char *tsig_name = NULL;
char *tsig_data = NULL;
char *tsig_algorithm = NULL;
size_t tsig_separator;
size_t tsig_separator2;
ldns_rr *axfr_rr;
ldns_status status;
char *type_str;
/* list of keys used in dnssec operations */
ldns_rr_list *key_list = ldns_rr_list_new();
/* what key verify the current answer */
ldns_rr_list *key_verified;
/* resolver options */
uint16_t qflags;
uint16_t qbuf;
uint16_t qport;
uint8_t qfamily;
bool qdnssec;
bool qfallback;
bool qds;
bool qusevc;
bool qrandom;
char *resolv_conf_file = NULL;
ldns_rdf *trace_start_name = NULL;
int result = 0;
#ifdef USE_WINSOCK
int r;
WSADATA wsa_data;
#endif
int_type = -1; serv = NULL; type = 0;
int_clas = -1; name = NULL; clas = 0;
qname = NULL;
progname = strdup(argv[0]);
#ifdef USE_WINSOCK
r = WSAStartup(MAKEWORD(2,2), &wsa_data);
if(r != 0) {
printf("Failed WSAStartup: %d\n", r);
result = EXIT_FAILURE;
goto exit;
}
#endif /* USE_WINSOCK */
PURPOSE = DRILL_QUERY;
qflags = LDNS_RD;
qport = LDNS_PORT;
verbosity = 2;
qdnssec = false;
qfamily = LDNS_RESOLV_INETANY;
qfallback = false;
qds = false;
qbuf = 0;
qusevc = false;
qrandom = true;
key_verified = NULL;
ldns_init_random(NULL, 0);
if (argc == 0) {
usage(stdout, progname);
result = EXIT_FAILURE;
goto exit;
}
/* string from orig drill: "i:w:I46Sk:TNp:b:DsvhVcuaq:f:xr" */
/* global first, query opt next, option with parm's last
* and sorted */ /* "46DITSVQf:i:w:q:achuvxzy:so:p:b:k:" */
while ((c = getopt(argc, argv, "46ab:c:d:Df:hi:Ik:o:p:q:Qr:sStTuvV:w:xy:z")) != -1) {
switch(c) {
/* global options */
case '4':
qfamily = LDNS_RESOLV_INET;
break;
case '6':
qfamily = LDNS_RESOLV_INET6;
break;
case 'D':
qdnssec = true;
break;
case 'I':
/* reserved for backward compatibility */
break;
case 'T':
if (PURPOSE == DRILL_CHASE) {
fprintf(stderr, "-T and -S cannot be used at the same time.\n");
exit(EXIT_FAILURE);
}
PURPOSE = DRILL_TRACE;
break;
#ifdef HAVE_SSL
case 'S':
if (PURPOSE == DRILL_TRACE) {
fprintf(stderr, "-T and -S cannot be used at the same time.\n");
exit(EXIT_FAILURE);
}
PURPOSE = DRILL_CHASE;
break;
#endif /* HAVE_SSL */
case 'V':
if (strtok(optarg, "0123456789") != NULL) {
fprintf(stderr, "-V expects an number as an argument.\n");
exit(EXIT_FAILURE);
}
verbosity = atoi(optarg);
break;
case 'Q':
verbosity = -1;
break;
case 'f':
query_file = optarg;
break;
case 'i':
answer_file = optarg;
PURPOSE = DRILL_AFROMFILE;
break;
case 'w':
answer_file = optarg;
break;
case 'q':
query_file = optarg;
PURPOSE = DRILL_QTOFILE;
break;
case 'r':
if (global_dns_root) {
fprintf(stderr, "There was already a series of root servers set\n");
exit(EXIT_FAILURE);
}
global_dns_root = read_root_hints(optarg);
if (!global_dns_root) {
fprintf(stderr, "Unable to read root hints file %s, aborting\n", optarg);
exit(EXIT_FAILURE);
}
break;
/* query options */
case 'a':
qfallback = true;
break;
case 'b':
qbuf = (uint16_t)atoi(optarg);
if (qbuf == 0) {
error("%s", "<bufsize> could not be converted");
}
break;
case 'c':
resolv_conf_file = optarg;
break;
case 't':
qusevc = true;
break;
case 'k':
status = read_key_file(optarg,
key_list, false);
if (status != LDNS_STATUS_OK) {
error("Could not parse the key file %s: %s", optarg, ldns_get_errorstr_by_id(status));
}
qdnssec = true; /* enable that too */
break;
case 'o':
/* only looks at the first hit: capital=ON, lowercase=OFF*/
if (strstr(optarg, "QR")) {
DRILL_ON(qflags, LDNS_QR);
}
if (strstr(optarg, "qr")) {
DRILL_OFF(qflags, LDNS_QR);
}
if (strstr(optarg, "AA")) {
DRILL_ON(qflags, LDNS_AA);
}
if (strstr(optarg, "aa")) {
DRILL_OFF(qflags, LDNS_AA);
}
if (strstr(optarg, "TC")) {
DRILL_ON(qflags, LDNS_TC);
}
if (strstr(optarg, "tc")) {
DRILL_OFF(qflags, LDNS_TC);
}
if (strstr(optarg, "RD")) {
DRILL_ON(qflags, LDNS_RD);
}
if (strstr(optarg, "rd")) {
DRILL_OFF(qflags, LDNS_RD);
}
if (strstr(optarg, "CD")) {
DRILL_ON(qflags, LDNS_CD);
}
if (strstr(optarg, "cd")) {
DRILL_OFF(qflags, LDNS_CD);
}
if (strstr(optarg, "RA")) {
DRILL_ON(qflags, LDNS_RA);
}
if (strstr(optarg, "ra")) {
DRILL_OFF(qflags, LDNS_RA);
}
if (strstr(optarg, "AD")) {
DRILL_ON(qflags, LDNS_AD);
}
if (strstr(optarg, "ad")) {
DRILL_OFF(qflags, LDNS_AD);
}
break;
case 'p':
qport = (uint16_t)atoi(optarg);
if (qport == 0) {
error("%s", "<port> could not be converted");
}
break;
case 's':
qds = true;
break;
case 'u':
qusevc = false;
break;
case 'v':
version(stdout, progname);
result = EXIT_SUCCESS;
goto exit;
case 'x':
PURPOSE = DRILL_REVERSE;
break;
case 'y':
#ifdef HAVE_SSL
if (strchr(optarg, ':')) {
tsig_separator = (size_t) (strchr(optarg, ':') - optarg);
if (strchr(optarg + tsig_separator + 1, ':')) {
tsig_separator2 = (size_t) (strchr(optarg + tsig_separator + 1, ':') - optarg);
tsig_algorithm = xmalloc(strlen(optarg) - tsig_separator2);
strncpy(tsig_algorithm, optarg + tsig_separator2 + 1, strlen(optarg) - tsig_separator2);
tsig_algorithm[strlen(optarg) - tsig_separator2 - 1] = '\0';
} else {
tsig_separator2 = strlen(optarg);
tsig_algorithm = xmalloc(26);
strncpy(tsig_algorithm, "hmac-md5.sig-alg.reg.int.", 25);
tsig_algorithm[25] = '\0';
}
tsig_name = xmalloc(tsig_separator + 1);
tsig_data = xmalloc(tsig_separator2 - tsig_separator);
strncpy(tsig_name, optarg, tsig_separator);
strncpy(tsig_data, optarg + tsig_separator + 1, tsig_separator2 - tsig_separator - 1);
/* strncpy does not append \0 if source is longer than n */
tsig_name[tsig_separator] = '\0';
tsig_data[ tsig_separator2 - tsig_separator - 1] = '\0';
}
#else
fprintf(stderr, "TSIG requested, but SSL is not supported\n");
result = EXIT_FAILURE;
goto exit;
#endif /* HAVE_SSL */
break;
case 'z':
qrandom = false;
break;
case 'd':
trace_start_name = ldns_dname_new_frm_str(optarg);
if (!trace_start_name) {
fprintf(stderr, "Unable to parse argument for -%c\n", c);
result = EXIT_FAILURE;
goto exit;
}
break;
case 'h':
version(stdout, progname);
usage(stdout, progname);
result = EXIT_SUCCESS;
goto exit;
break;
default:
fprintf(stderr, "Unknown argument: -%c, use -h to see usage\n", c);
result = EXIT_FAILURE;
goto exit;
}
}
argc -= optind;
argv += optind;
if ((PURPOSE == DRILL_CHASE || (PURPOSE == DRILL_TRACE && qdnssec)) &&
ldns_rr_list_rr_count(key_list) == 0) {
(void) read_key_file(LDNS_TRUST_ANCHOR_FILE, key_list, true);
}
if (ldns_rr_list_rr_count(key_list) > 0) {
printf(";; Number of trusted keys: %d\n",
(int) ldns_rr_list_rr_count(key_list));
}
/* do a secure trace when requested */
if (PURPOSE == DRILL_TRACE && qdnssec) {
#ifdef HAVE_SSL
if (ldns_rr_list_rr_count(key_list) == 0) {
warning("%s", "No trusted keys were given. Will not be able to verify authenticity!");
}
PURPOSE = DRILL_SECTRACE;
#else
fprintf(stderr, "ldns has not been compiled with OpenSSL support. Secure trace not available\n");
exit(1);
#endif /* HAVE_SSL */
}
/* parse the arguments, with multiple arguments, the last argument
* found is used */
for(i = 0; i < argc; i++) {
/* if ^@ then it's a server */
if (argv[i][0] == '@') {
if (strlen(argv[i]) == 1) {
warning("%s", "No nameserver given");
exit(EXIT_FAILURE);
}
serv = argv[i] + 1;
continue;
}
/* if has a dot, it's a name */
if (strchr(argv[i], '.')) {
name = argv[i];
continue;
}
/* if it matches a type, it's a type */
if (int_type == -1) {
type = ldns_get_rr_type_by_name(argv[i]);
if (type != 0) {
int_type = 0;
continue;
}
}
/* if it matches a class, it's a class */
if (int_clas == -1) {
clas = ldns_get_rr_class_by_name(argv[i]);
if (clas != 0) {
int_clas = 0;
continue;
}
}
/* it all fails assume it's a name */
name = argv[i];
}
/* act like dig and use for . NS */
if (!name) {
name = ".";
int_type = 0;
type = LDNS_RR_TYPE_NS;
}
/* defaults if not given */
if (int_clas == -1) {
clas = LDNS_RR_CLASS_IN;
}
if (int_type == -1) {
if (PURPOSE != DRILL_REVERSE) {
type = LDNS_RR_TYPE_A;
} else {
type = LDNS_RR_TYPE_PTR;
}
}
/* set the nameserver to use */
if (!serv) {
/* no server given make a resolver from /etc/resolv.conf */
status = ldns_resolver_new_frm_file(&res, resolv_conf_file);
if (status != LDNS_STATUS_OK) {
warning("Could not create a resolver structure: %s (%s)\n"
"Try drill @localhost if you have a resolver running on your machine.",
ldns_get_errorstr_by_id(status), resolv_conf_file);
result = EXIT_FAILURE;
goto exit;
}
} else {
res = ldns_resolver_new();
if (!res || strlen(serv) <= 0) {
warning("Could not create a resolver structure");
result = EXIT_FAILURE;
goto exit;
}
/* add the nameserver */
serv_rdf = ldns_rdf_new_addr_frm_str(serv);
if (!serv_rdf) {
/* try to resolv the name if possible */
status = ldns_resolver_new_frm_file(&cmdline_res, resolv_conf_file);
if (status != LDNS_STATUS_OK) {
error("%s", "@server ip could not be converted");
}
ldns_resolver_set_dnssec(cmdline_res, qdnssec);
ldns_resolver_set_ip6(cmdline_res, qfamily);
ldns_resolver_set_fallback(cmdline_res, qfallback);
ldns_resolver_set_usevc(cmdline_res, qusevc);
cmdline_dname = ldns_dname_new_frm_str(serv);
cmdline_rr_list = ldns_get_rr_list_addr_by_name(
cmdline_res,
cmdline_dname,
LDNS_RR_CLASS_IN,
qflags);
ldns_rdf_deep_free(cmdline_dname);
if (!cmdline_rr_list) {
/* This error msg is not always accurate */
error("%s `%s\'", "could not find any address for the name:", serv);
} else {
if (ldns_resolver_push_nameserver_rr_list(
res,
cmdline_rr_list
) != LDNS_STATUS_OK) {
error("%s", "pushing nameserver");
}
}
} else {
if (ldns_resolver_push_nameserver(res, serv_rdf) != LDNS_STATUS_OK) {
error("%s", "pushing nameserver");
} else {
ldns_rdf_deep_free(serv_rdf);
}
}
}
/* set the resolver options */
ldns_resolver_set_port(res, qport);
if (verbosity >= 5) {
ldns_resolver_set_debug(res, true);
} else {
ldns_resolver_set_debug(res, false);
}
ldns_resolver_set_dnssec(res, qdnssec);
/* ldns_resolver_set_dnssec_cd(res, qdnssec);*/
ldns_resolver_set_ip6(res, qfamily);
ldns_resolver_set_fallback(res, qfallback);
ldns_resolver_set_usevc(res, qusevc);
ldns_resolver_set_random(res, qrandom);
if (qbuf != 0) {
ldns_resolver_set_edns_udp_size(res, qbuf);
}
if (!name &&
PURPOSE != DRILL_AFROMFILE &&
!query_file
) {
usage(stdout, progname);
result = EXIT_FAILURE;
goto exit;
}
if (tsig_name && tsig_data) {
ldns_resolver_set_tsig_keyname(res, tsig_name);
ldns_resolver_set_tsig_keydata(res, tsig_data);
ldns_resolver_set_tsig_algorithm(res, tsig_algorithm);
}
/* main switching part of drill */
switch(PURPOSE) {
case DRILL_TRACE:
/* do a trace from the root down */
if (!global_dns_root) {
init_root();
}
qname = ldns_dname_new_frm_str(name);
if (!qname) {
error("%s", "parsing query name");
}
/* don't care about return packet */
(void)do_trace(res, qname, type, clas);
clear_root();
break;
case DRILL_SECTRACE:
/* do a secure trace from the root down */
if (!global_dns_root) {
init_root();
}
qname = ldns_dname_new_frm_str(name);
if (!qname) {
error("%s", "making qname");
}
/* don't care about return packet */
#ifdef HAVE_SSL
result = do_secure_trace(res, qname, type, clas, key_list, trace_start_name);
#endif /* HAVE_SSL */
clear_root();
break;
case DRILL_CHASE:
qname = ldns_dname_new_frm_str(name);
if (!qname) {
error("%s", "making qname");
}
ldns_resolver_set_dnssec(res, true);
ldns_resolver_set_dnssec_cd(res, true);
/* set dnssec implies udp_size of 4096 */
ldns_resolver_set_edns_udp_size(res, 4096);
pkt = ldns_resolver_query(res, qname, type, clas, qflags);
if (!pkt) {
error("%s", "error pkt sending");
result = EXIT_FAILURE;
} else {
if (verbosity >= 3) {
ldns_pkt_print(stdout, pkt);
}
if (!ldns_pkt_answer(pkt)) {
mesg("No answer in packet");
} else {
#ifdef HAVE_SSL
ldns_resolver_set_dnssec_anchors(res, ldns_rr_list_clone(key_list));
result = do_chase(res, qname, type,
clas, key_list,
pkt, qflags, NULL,
verbosity);
if (result == LDNS_STATUS_OK) {
if (verbosity != -1) {
mesg("Chase successful");
}
result = 0;
} else {
if (verbosity != -1) {
mesg("Chase failed.");
}
}
#endif /* HAVE_SSL */
}
ldns_pkt_free(pkt);
}
break;
case DRILL_AFROMFILE:
pkt = read_hex_pkt(answer_file);
if (pkt) {
if (verbosity != -1) {
ldns_pkt_print(stdout, pkt);
}
ldns_pkt_free(pkt);
}
break;
case DRILL_QTOFILE:
qname = ldns_dname_new_frm_str(name);
if (!qname) {
error("%s", "making qname");
}
status = ldns_resolver_prepare_query_pkt(&qpkt, res, qname, type, clas, qflags);
if(status != LDNS_STATUS_OK) {
error("%s", "making query: %s",
ldns_get_errorstr_by_id(status));
}
dump_hex(qpkt, query_file);
ldns_pkt_free(qpkt);
break;
case DRILL_NSEC:
break;
case DRILL_REVERSE:
/* ipv4 or ipv6 addr? */
if (strchr(name, ':')) {
if (strchr(name, '.')) {
error("Syntax error: both '.' and ':' seen in address\n");
}
name2 = malloc(IP6_ARPA_MAX_LEN + 20);
c = 0;
for (i=0; i<(int)strlen(name); i++) {
if (i >= IP6_ARPA_MAX_LEN) {
error("%s", "reverse argument to long");
}
if (name[i] == ':') {
if (i < (int) strlen(name) && name[i + 1] == ':') {
error("%s", ":: not supported (yet)");
} else {
if (i + 2 == (int) strlen(name) || name[i + 2] == ':') {
name2[c++] = '0';
name2[c++] = '.';
name2[c++] = '0';
name2[c++] = '.';
name2[c++] = '0';
name2[c++] = '.';
} else if (i + 3 == (int) strlen(name) || name[i + 3] == ':') {
name2[c++] = '0';
name2[c++] = '.';
name2[c++] = '0';
name2[c++] = '.';
} else if (i + 4 == (int) strlen(name) || name[i + 4] == ':') {
name2[c++] = '0';
name2[c++] = '.';
}
}
} else {
name2[c++] = name[i];
name2[c++] = '.';
}
}
name2[c++] = '\0';
qname = ldns_dname_new_frm_str(name2);
qname_tmp = ldns_dname_reverse(qname);
ldns_rdf_deep_free(qname);
qname = qname_tmp;
qname_tmp = ldns_dname_new_frm_str("ip6.arpa.");
status = ldns_dname_cat(qname, qname_tmp);
if (status != LDNS_STATUS_OK) {
error("%s", "could not create reverse address for ip6: %s\n", ldns_get_errorstr_by_id(status));
}
ldns_rdf_deep_free(qname_tmp);
free(name2);
} else {
qname = ldns_dname_new_frm_str(name);
qname_tmp = ldns_dname_reverse(qname);
ldns_rdf_deep_free(qname);
qname = qname_tmp;
qname_tmp = ldns_dname_new_frm_str("in-addr.arpa.");
status = ldns_dname_cat(qname, qname_tmp);
if (status != LDNS_STATUS_OK) {
error("%s", "could not create reverse address for ip4: %s\n", ldns_get_errorstr_by_id(status));
}
ldns_rdf_deep_free(qname_tmp);
}
if (!qname) {
error("%s", "-x implies an ip address");
}
/* create a packet and set the RD flag on it */
pkt = ldns_resolver_query(res, qname, type, clas, qflags);
if (!pkt) {
error("%s", "pkt sending");
result = EXIT_FAILURE;
} else {
if (verbosity != -1) {
ldns_pkt_print(stdout, pkt);
}
ldns_pkt_free(pkt);
}
break;
case DRILL_QUERY:
default:
if (query_file) {
/* this old way, the query packet needed
to be parseable, but we want to be able
to send mangled packets, so we need
to do it directly */
#if 0
qpkt = read_hex_pkt(query_file);
if (qpkt) {
status = ldns_resolver_send_pkt(&pkt, res, qpkt);
if (status != LDNS_STATUS_OK) {
printf("Error: %s\n", ldns_get_errorstr_by_id(status));
exit(1);
}
} else {
/* qpkt was bogus, reset pkt */
pkt = NULL;
}
#endif
query_buffer = read_hex_buffer(query_file);
if (query_buffer) {
status = ldns_send_buffer(&pkt, res, query_buffer, NULL);
ldns_buffer_free(query_buffer);
if (status != LDNS_STATUS_OK) {
printf("Error: %s\n", ldns_get_errorstr_by_id(status));
exit(1);
}
} else {
printf("NO BUFFER\n");
pkt = NULL;
}
} else {
qname = ldns_dname_new_frm_str(name);
if (!qname) {
error("%s", "error in making qname");
}
if (type == LDNS_RR_TYPE_AXFR) {
status = ldns_axfr_start(res, qname, clas);
if(status != LDNS_STATUS_OK) {
error("Error starting axfr: %s",
ldns_get_errorstr_by_id(status));
}
axfr_rr = ldns_axfr_next(res);
if(!axfr_rr) {
fprintf(stderr, "AXFR failed.\n");
ldns_pkt_print(stdout,
ldns_axfr_last_pkt(res));
goto exit;
}
while (axfr_rr) {
if (verbosity != -1) {
ldns_rr_print(stdout, axfr_rr);
}
ldns_rr_free(axfr_rr);
axfr_rr = ldns_axfr_next(res);
}
goto exit;
} else {
/* create a packet and set the RD flag on it */
pkt = ldns_resolver_query(res, qname, type, clas, qflags);
}
}
if (!pkt) {
mesg("No packet received");
result = EXIT_FAILURE;
} else {
if (verbosity != -1) {
ldns_pkt_print(stdout, pkt);
if (ldns_pkt_tc(pkt)) {
fprintf(stdout,
"\n;; WARNING: The answer packet was truncated; you might want to\n");
fprintf(stdout,
";; query again with TCP (-t argument), or EDNS0 (-b for buffer size)\n");
}
}
if (qds) {
if (verbosity != -1) {
print_ds_of_keys(pkt);
printf("\n");
}
}
if (ldns_rr_list_rr_count(key_list) > 0) {
/* -k's were given on the cmd line */
ldns_rr_list *rrset_verified;
uint16_t key_count;
rrset_verified = ldns_pkt_rr_list_by_name_and_type(
pkt, qname, type,
LDNS_SECTION_ANY_NOQUESTION);
if (type == LDNS_RR_TYPE_ANY) {
/* don't verify this */
break;
}
if (verbosity != -1) {
printf("; ");
ldns_rr_list_print(stdout, rrset_verified);
}
/* verify */
#ifdef HAVE_SSL
key_verified = ldns_rr_list_new();
result = ldns_pkt_verify(pkt, type, qname, key_list, NULL, key_verified);
if (result == LDNS_STATUS_ERR) {
/* is the existence denied then? */
result = ldns_verify_denial(pkt, qname, type, NULL, NULL);
if (result == LDNS_STATUS_OK) {
if (verbosity != -1) {
printf("Existence denied for ");
ldns_rdf_print(stdout, qname);
type_str = ldns_rr_type2str(type);
printf("\t%s\n", type_str);
LDNS_FREE(type_str);
}
} else {
if (verbosity != -1) {
printf("Bad data; RR for name and "
"type not found or failed to "
"verify, and denial of "
"existence failed.\n");
}
}
} else if (result == LDNS_STATUS_OK) {
for(key_count = 0; key_count < ldns_rr_list_rr_count(key_verified);
key_count++) {
if (verbosity != -1) {
printf("; VALIDATED by id = %u, owner = ",
(unsigned int)ldns_calc_keytag(
ldns_rr_list_rr(key_verified, key_count)));
ldns_rdf_print(stdout, ldns_rr_owner(
ldns_rr_list_rr(key_list, key_count)));
printf("\n");
}
}
} else {
for(key_count = 0; key_count < ldns_rr_list_rr_count(key_list);
key_count++) {
if (verbosity != -1) {
printf("; %s for id = %u, owner = ",
ldns_get_errorstr_by_id(result),
(unsigned int)ldns_calc_keytag(
ldns_rr_list_rr(key_list, key_count)));
ldns_rdf_print(stdout, ldns_rr_owner(
ldns_rr_list_rr(key_list,
key_count)));
printf("\n");
}
}
}
ldns_rr_list_free(key_verified);
#else
(void) key_count;
#endif /* HAVE_SSL */
}
if (answer_file) {
dump_hex(pkt, answer_file);
}
ldns_pkt_free(pkt);
}
break;
}
exit:
ldns_rdf_deep_free(qname);
ldns_resolver_deep_free(res);
ldns_resolver_deep_free(cmdline_res);
ldns_rr_list_deep_free(key_list);
ldns_rr_list_deep_free(cmdline_rr_list);
ldns_rdf_deep_free(trace_start_name);
xfree(progname);
xfree(tsig_name);
xfree(tsig_data);
xfree(tsig_algorithm);
#ifdef HAVE_SSL
ERR_remove_state(0);
CRYPTO_cleanup_all_ex_data();
ERR_free_strings();
EVP_cleanup();
#endif
#ifdef USE_WINSOCK
WSACleanup();
#endif
return result;
}
/* same naive method as in drill0.9
* We resolver _ALL_ the names, which is ofcourse not needed
* We _do_ use the local resolver to do that, so it still is
* fast, but it can be made to run much faster
*/
ldns_pkt *
do_trace(ldns_resolver *local_res, ldns_rdf *name, ldns_rr_type t,
ldns_rr_class c)
{
ldns_resolver *res;
ldns_pkt *p;
ldns_rr_list *new_nss_a;
ldns_rr_list *new_nss_aaaa;
ldns_rr_list *final_answer;
ldns_rr_list *new_nss;
ldns_rr_list *ns_addr;
uint16_t loop_count;
ldns_rdf *pop;
ldns_status status;
size_t i;
loop_count = 0;
new_nss_a = NULL;
new_nss_aaaa = NULL;
new_nss = NULL;
ns_addr = NULL;
final_answer = NULL;
p = ldns_pkt_new();
res = ldns_resolver_new();
if (!p) {
if (res) {
ldns_resolver_free(res);
}
error("Memory allocation failed");
return NULL;
}
if (!res) {
ldns_pkt_free(p);
error("Memory allocation failed");
return NULL;
}
/* transfer some properties of local_res to res,
* because they were given on the commandline */
ldns_resolver_set_ip6(res,
ldns_resolver_ip6(local_res));
ldns_resolver_set_port(res,
ldns_resolver_port(local_res));
ldns_resolver_set_debug(res,
ldns_resolver_debug(local_res));
ldns_resolver_set_dnssec(res,
ldns_resolver_dnssec(local_res));
ldns_resolver_set_fail(res,
ldns_resolver_fail(local_res));
ldns_resolver_set_usevc(res,
ldns_resolver_usevc(local_res));
ldns_resolver_set_random(res,
ldns_resolver_random(local_res));
ldns_resolver_set_recursive(res, false);
/* setup the root nameserver in the new resolver */
status = ldns_resolver_push_nameserver_rr_list(res, global_dns_root);
if (status != LDNS_STATUS_OK) {
fprintf(stderr, "Error adding root servers to resolver: %s\n", ldns_get_errorstr_by_id(status));
ldns_rr_list_print(stdout, global_dns_root);
ldns_resolver_free(res);
ldns_pkt_free(p);
return NULL;
}
/* this must be a real query to local_res */
status = ldns_resolver_send(&p, res, ldns_dname_new_frm_str("."), LDNS_RR_TYPE_NS, c, 0);
/* p can still be NULL */
if (ldns_pkt_empty(p)) {
warning("No root server information received");
}
if (status == LDNS_STATUS_OK) {
if (!ldns_pkt_empty(p)) {
drill_pkt_print(stdout, local_res, p);
}
} else {
error("cannot use local resolver");
return NULL;
}
status = ldns_resolver_send(&p, res, name, t, c, 0);
while(status == LDNS_STATUS_OK &&
ldns_pkt_reply_type(p) == LDNS_PACKET_REFERRAL) {
if (!p) {
/* some error occurred, bail out */
return NULL;
}
new_nss_a = ldns_pkt_rr_list_by_type(p,
LDNS_RR_TYPE_A, LDNS_SECTION_ADDITIONAL);
new_nss_aaaa = ldns_pkt_rr_list_by_type(p,
LDNS_RR_TYPE_AAAA, LDNS_SECTION_ADDITIONAL);
new_nss = ldns_pkt_rr_list_by_type(p,
LDNS_RR_TYPE_NS, LDNS_SECTION_AUTHORITY);
if (verbosity != -1) {
ldns_rr_list_print(stdout, new_nss);
}
/* checks itself for verbosity */
drill_pkt_print_footer(stdout, local_res, p);
/* remove the old nameserver from the resolver */
while(ldns_resolver_pop_nameserver(res)) { /* do it */ }
/* also check for new_nss emptyness */
if (!new_nss_aaaa && !new_nss_a) {
/*
* no nameserver found!!!
* try to resolve the names we do got
*/
for(i = 0; i < ldns_rr_list_rr_count(new_nss); i++) {
/* get the name of the nameserver */
pop = ldns_rr_rdf(ldns_rr_list_rr(new_nss, i), 0);
if (!pop) {
break;
}
ldns_rr_list_print(stdout, new_nss);
ldns_rdf_print(stdout, pop);
/* retrieve it's addresses */
ns_addr = ldns_rr_list_cat_clone(ns_addr,
ldns_get_rr_list_addr_by_name(local_res, pop, c, 0));
}
if (ns_addr) {
if (ldns_resolver_push_nameserver_rr_list(res, ns_addr) !=
LDNS_STATUS_OK) {
error("Error adding new nameservers");
ldns_pkt_free(p);
return NULL;
}
ldns_rr_list_free(ns_addr);
} else {
ldns_rr_list_print(stdout, ns_addr);
error("Could not find the nameserver ip addr; abort");
ldns_pkt_free(p);
return NULL;
}
}
/* add the new ones */
if (new_nss_aaaa) {
if (ldns_resolver_push_nameserver_rr_list(res, new_nss_aaaa) !=
LDNS_STATUS_OK) {
error("adding new nameservers");
ldns_pkt_free(p);
return NULL;
}
}
if (new_nss_a) {
if (ldns_resolver_push_nameserver_rr_list(res, new_nss_a) !=
LDNS_STATUS_OK) {
error("adding new nameservers");
ldns_pkt_free(p);
return NULL;
}
}
if (loop_count++ > 20) {
/* unlikely that we are doing something usefull */
error("Looks like we are looping");
ldns_pkt_free(p);
return NULL;
}
status = ldns_resolver_send(&p, res, name, t, c, 0);
new_nss_aaaa = NULL;
new_nss_a = NULL;
ns_addr = NULL;
}
status = ldns_resolver_send(&p, res, name, t, c, 0);
if (!p) {
return NULL;
}
new_nss = ldns_pkt_authority(p);
final_answer = ldns_pkt_answer(p);
if (verbosity != -1) {
ldns_rr_list_print(stdout, final_answer);
ldns_rr_list_print(stdout, new_nss);
}
drill_pkt_print_footer(stdout, local_res, p);
ldns_pkt_free(p);
return NULL;
}
