static int
check_test_sweeper(eventer_t e, int mask, void *closure,
struct timeval *now) {
int left = 0;
mtev_skiplist_node *iter = NULL;
sweeper_event = NULL;
iter = mtev_skiplist_getlist(&in_progress);
while(iter) {
struct check_test_closure *cl = iter->data;
/* advance here, we might delete */
mtev_skiplist_next(&in_progress,&iter);
if(NOIT_CHECK_DISABLED(cl->check)) {
if(NOIT_CHECK_SHOULD_RESOLVE(cl->check))
noit_check_resolve(cl->check);
if(NOIT_CHECK_RESOLVED(cl->check)) {
noit_module_t *m = noit_module_lookup(cl->check->module);
cl->check->flags &= ~NP_DISABLED;
if(NOIT_CHECK_SHOULD_RESOLVE(cl->check))
mtevL(nldeb, "translated to %s\n", cl->check->target_ip);
if(m) m->initiate_check(m, cl->check, 1, NULL);
}
left++;
}
else if(NOIT_CHECK_RUNNING(cl->check)) left++;
else
mtev_skiplist_remove(&in_progress, cl->restc,
(mtev_freefunc_t)rest_test_check_result);
}
if(left) check_test_schedule_sweeper();
return 0;
}
static void blank_update_v6(dns_cache_node *n) {
if(n->ip6) free(n->ip6);
n->ip6 = NULL;
n->ip6_cnt = 0;
mtev_skiplist_remove(&nc_dns_cache, n->target, NULL);
n->last_updated = time(NULL);
if (n->lookup_inflight_v4) {
n->ttl = DEFAULT_FAILED_TTL;
}
n->lookup_inflight_v6 = mtev_false;
mtev_skiplist_insert(&nc_dns_cache, n);
}
static int
rest_test_check_err(mtev_http_rest_closure_t *restc,
int npats, char **pats) {
mtev_http_response *res = mtev_http_session_response(restc->http_ctx);
mtev_skiplist_remove(&in_progress, restc,
(mtev_freefunc_t)rest_test_check_result);
if(mtev_http_response_complete(res) != mtev_true) {
mtev_http_response_standard(restc->http_ctx, 500, "ERROR", "text/html");
mtev_http_response_end(restc->http_ctx);
}
return 0;
}
static int
noit_console_manip_dns_cache(mtev_console_closure_t ncct,
int argc, char **argv,
mtev_console_state_t *dstate,
void *closure) {
int i;
if(argc == 0) {
nc_printf(ncct, "dns_cache what?\n");
return 0;
}
DCLOCK();
if(closure == NULL) {
/* adding */
for(i=0;i<argc;i++) {
dns_cache_node *n;
n = mtev_skiplist_find(&nc_dns_cache, argv[i], NULL);
if(NULL != n) {
nc_printf(ncct, " == Already in system ==\n");
nc_print_dns_cache_node(ncct, argv[i], n);
}
else {
nc_printf(ncct, "%s submitted.\n", argv[i]);
noit_check_resolver_remind_internal(argv[i], mtev_false);
}
}
}
else {
for(i=0;i<argc;i++) {
dns_cache_node *n;
n = mtev_skiplist_find(&nc_dns_cache, argv[i], NULL);
if(NULL != n) {
if(n->lookup_inflight_v4 || n->lookup_inflight_v6)
nc_printf(ncct, "%s is currently resolving and cannot be removed.\n");
else {
mtev_skiplist_remove(&nc_dns_cache, argv[i], dns_cache_node_free);
nc_printf(ncct, "%s removed.\n", argv[i]);
}
}
else nc_printf(ncct, "%s not in system.\n", argv[i]);
}
}
DCUNLOCK();
return 0;
}
void noit_check_resolver_maintain() {
time_t now;
mtev_skiplist *tlist;
mtev_skiplist_node *sn;
now = time(NULL);
sn = mtev_skiplist_getlist(nc_dns_cache.index);
assert(sn);
tlist = sn->data;
assert(tlist);
sn = mtev_skiplist_getlist(tlist);
while(sn) {
dns_cache_node *n = sn->data;
mtev_skiplist_next(tlist, &sn); /* move forward */
/* remove if needed */
if(n->last_updated + n->ttl > now) break;
if(n->last_needed + DEFAULT_PURGE_AGE < now &&
!(n->lookup_inflight_v4 || n->lookup_inflight_v6))
mtev_skiplist_remove(&nc_dns_cache, n->target, dns_cache_node_free);
else {
int abs;
if(!dns_ptodn(n->target, strlen(n->target),
n->dn, sizeof(n->dn), &abs)) {
blank_update(n);
}
else {
if(!n->lookup_inflight_v4) {
n->lookup_inflight_v4 = mtev_true;
if(!dns_submit_dn(dns_ctx, n->dn, DNS_C_IN, DNS_T_A,
abs | dns_search_flag, NULL, dns_cache_resolve_v4, n))
blank_update_v4(n);
else
dns_timeouts(dns_ctx, -1, now);
}
if(!n->lookup_inflight_v6) {
n->lookup_inflight_v6 = mtev_true;
if(!dns_submit_dn(dns_ctx, n->dn, DNS_C_IN, DNS_T_AAAA,
abs | dns_search_flag, NULL, dns_cache_resolve_v6, n))
blank_update_v6(n);
else
dns_timeouts(dns_ctx, -1, now);
}
}
mtevL(noit_debug, "Firing lookup for '%s'\n", n->target);
continue;
}
}
/* If we have a cache implementation */
if(noit_resolver_cache_store_hook_exists()) {
/* And that implementation is interested in getting a dump... */
if(noit_resolver_cache_store_hook_invoke(NULL, NULL, 0) == MTEV_HOOK_CONTINUE) {
mtev_skiplist_node *sn;
/* dump it all */
DCLOCK();
for(sn = mtev_skiplist_getlist(&nc_dns_cache); sn;
mtev_skiplist_next(&nc_dns_cache, &sn)) {
int sbuffsize;
char sbuff[1024];
dns_cache_node *n = (dns_cache_node *)sn->data;
sbuffsize = dns_cache_node_serialize(sbuff, sizeof(sbuff), n);
if(sbuffsize > 0)
noit_resolver_cache_store_hook_invoke(n->target, sbuff, sbuffsize);
}
DCUNLOCK();
}
}
}
static void dns_cache_resolve(struct dns_ctx *ctx, void *result, void *data,
enum dns_type rtype) {
int ttl, acnt, r = dns_status(ctx), idnlen;
dns_cache_node *n = data;
unsigned char idn[DNS_MAXDN], dn[DNS_MAXDN];
struct dns_parse p;
struct dns_rr rr;
unsigned nrr;
struct in_addr *answers4;
struct in6_addr *answers6;
const unsigned char *pkt, *cur, *end;
if(!result) goto blank;
dns_dntodn(n->dn, idn, sizeof(idn));
idnlen = dns_dnlen(idn);
pkt = result; end = pkt + r; cur = dns_payload(pkt);
dns_getdn(pkt, &cur, end, dn, sizeof(dn));
dns_initparse(&p, NULL, pkt, cur, end);
p.dnsp_qcls = 0;
p.dnsp_qtyp = 0;
nrr = 0;
ttl = 0;
while((r = dns_nextrr(&p, &rr)) > 0) {
int dnlen = dns_dnlen(rr.dnsrr_dn);
/* if we aren't searching and the don't match...
* or if we are searching and the prefixes don't match...
*/
if ((dns_search_flag && !dns_dnequal(idn, rr.dnsrr_dn)) ||
(dns_search_flag == 0 &&
(idnlen > dnlen || memcmp(idn, rr.dnsrr_dn, idnlen-1)))) continue;
if (DNS_C_IN == rr.dnsrr_cls && rtype == rr.dnsrr_typ) ++nrr;
else if (rr.dnsrr_typ == DNS_T_CNAME && !nrr) {
if (dns_getdn(pkt, &rr.dnsrr_dptr, end,
p.dnsp_dnbuf, sizeof(p.dnsp_dnbuf)) <= 0 ||
rr.dnsrr_dptr != rr.dnsrr_dend) {
break;
}
else {
if(rr.dnsrr_ttl > 0 && (ttl == 0 || rr.dnsrr_ttl < ttl))
ttl = rr.dnsrr_ttl;
dns_dntodn(p.dnsp_dnbuf, idn, sizeof(idn));
idnlen = dns_dnlen(idn);
}
}
}
if(!r && !nrr) goto blank;
dns_rewind(&p, NULL);
p.dnsp_qcls = DNS_C_IN;
p.dnsp_qtyp = rtype;
if(rtype == DNS_T_A)
answers4 = calloc(nrr, sizeof(*answers4));
else if(rtype == DNS_T_AAAA)
answers6 = calloc(nrr, sizeof(*answers6));
acnt = 0;
while(dns_nextrr(&p, &rr) && nrr < MAX_RR) {
int dnlen = dns_dnlen(rr.dnsrr_dn);
if ((dns_search_flag && !dns_dnequal(idn, rr.dnsrr_dn)) ||
(dns_search_flag == 0 &&
(idnlen > dnlen || memcmp(idn, rr.dnsrr_dn, idnlen-1)))) continue;
if (p.dnsp_rrl && !rr.dnsrr_dn[0] && rr.dnsrr_typ == DNS_T_OPT) continue;
if (rtype == rr.dnsrr_typ) {
if(rr.dnsrr_ttl > 0 && (ttl == 0 || rr.dnsrr_ttl < ttl))
ttl = rr.dnsrr_ttl;
switch(rr.dnsrr_typ) {
case DNS_T_A:
if(rr.dnsrr_dsz != 4) continue;
memcpy(&answers4[acnt++], rr.dnsrr_dptr, rr.dnsrr_dsz);
break;
case DNS_T_AAAA:
if(rr.dnsrr_dsz != 16) continue;
memcpy(&answers6[acnt++], rr.dnsrr_dptr, rr.dnsrr_dsz);
break;
default:
break;
}
}
}
n->ttl = ttl;
if(rtype == DNS_T_A) {
if(n->ip4) free(n->ip4);
n->ip4_cnt = acnt;
n->ip4 = answers4;
n->lookup_inflight_v4 = mtev_false;
}
else if(rtype == DNS_T_AAAA) {
if(n->ip6) free(n->ip6);
n->ip6_cnt = acnt;
n->ip6 = answers6;
n->lookup_inflight_v6 = mtev_false;
}
else {
if(result) free(result);
return;
}
DCLOCK();
mtev_skiplist_remove(&nc_dns_cache, n->target, NULL);
n->last_updated = time(NULL);
mtev_skiplist_insert(&nc_dns_cache, n);
DCUNLOCK();
mtevL(noit_debug, "Resolved %s/%s -> %d records\n", n->target,
(rtype == DNS_T_AAAA ? "IPv6" : (rtype == DNS_T_A ? "IPv4" : "???")),
acnt);
if(result) free(result);
return;
blank:
DCLOCK();
if(rtype == DNS_T_A) blank_update_v4(n);
if(rtype == DNS_T_AAAA) blank_update_v6(n);
DCUNLOCK();
mtevL(noit_debug, "Resolved %s/%s -> blank\n", n->target,
(rtype == DNS_T_AAAA ? "IPv6" : (rtype == DNS_T_A ? "IPv4" : "???")));
if(result) free(result);
return;
}
