-/*
- * pythonmod_utils.c: utilities used by wrapper
- *
- * Copyright (c) 2009, Zdenek Vasicek (vasicek AT fit.vutbr.cz)
- * Marek Vavrusa (xvavru00 AT stud.fit.vutbr.cz)
- *
- * This software is open source.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * * Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * * Neither the name of the organization nor the names of its
- * contributors may be used to endorse or promote products derived from this
- * software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-/**
- * \file
- * Utility functions for the python module that perform stores and loads and
- * conversions.
- */
-#include "config.h"
-#include "util/module.h"
-#include "util/netevent.h"
-#include "util/net_help.h"
-#include "services/cache/dns.h"
-#include "services/cache/rrset.h"
-#include "util/data/msgparse.h"
-#include "util/data/msgreply.h"
-#include "util/storage/slabhash.h"
-#include "util/regional.h"
-#include "ldns/sbuffer.h"
-
-#undef _POSIX_C_SOURCE
-#undef _XOPEN_SOURCE
-#include <Python.h>
-
-/* Store the reply_info and query_info pair in message cache (qstate->msg_cache) */
-int storeQueryInCache(struct module_qstate* qstate, struct query_info* qinfo, struct reply_info* msgrep, int is_referral)
-{
- if (!msgrep)
- return 0;
-
- if (msgrep->authoritative) /*authoritative answer can't be stored in cache*/
- {
- PyErr_SetString(PyExc_ValueError, "Authoritative answer can't be stored");
- return 0;
- }
-
- return dns_cache_store(qstate->env, qinfo, msgrep, is_referral,
- qstate->prefetch_leeway, 0, NULL, qstate->query_flags);
-}
-
-/* Invalidate the message associated with query_info stored in message cache */
-void invalidateQueryInCache(struct module_qstate* qstate, struct query_info* qinfo)
-{
- hashvalue_t h;
- struct lruhash_entry* e;
- struct reply_info *r;
- size_t i, j;
-
- h = query_info_hash(qinfo, qstate->query_flags);
- if ((e=slabhash_lookup(qstate->env->msg_cache, h, qinfo, 0)))
- {
- r = (struct reply_info*)(e->data);
- if (r)
- {
- r->ttl = 0;
- if(rrset_array_lock(r->ref, r->rrset_count, *qstate->env->now)) {
- for(i=0; i< r->rrset_count; i++)
- {
- struct packed_rrset_data* data =
- (struct packed_rrset_data*) r->ref[i].key->entry.data;
- if(i>0 && r->ref[i].key == r->ref[i-1].key)
- continue;
-
- data->ttl = r->ttl;
- for(j=0; j<data->count + data->rrsig_count; j++)
- data->rr_ttl[j] = r->ttl;
- }
- rrset_array_unlock(r->ref, r->rrset_count);
- }
- }
- lock_rw_unlock(&e->lock);
- } else {
- log_info("invalidateQueryInCache: qinfo is not in cache");
- }
-}
-
-/* Create response according to the ldns packet content */
-int createResponse(struct module_qstate* qstate, sldns_buffer* pkt)
-{
- struct msg_parse* prs;
- struct edns_data edns;
-
- /* parse message */
- prs = (struct msg_parse*) regional_alloc(qstate->env->scratch, sizeof(struct msg_parse));
- if (!prs) {
- log_err("storeResponse: out of memory on incoming message");
- return 0;
- }
-
- memset(prs, 0, sizeof(*prs));
- memset(&edns, 0, sizeof(edns));
-
- sldns_buffer_set_position(pkt, 0);
- if (parse_packet(pkt, prs, qstate->env->scratch) != LDNS_RCODE_NOERROR) {
- verbose(VERB_ALGO, "storeResponse: parse error on reply packet");
- return 0;
- }
- /* edns is not examined, but removed from message to help cache */
- if(parse_extract_edns(prs, &edns) != LDNS_RCODE_NOERROR)
- return 0;
-
- /* remove CD-bit, we asked for in case we handle validation ourself */
- prs->flags &= ~BIT_CD;
-
- /* allocate response dns_msg in region */
- qstate->return_msg = (struct dns_msg*)regional_alloc(qstate->region, sizeof(struct dns_msg));
- if (!qstate->return_msg)
- return 0;
-
- memset(qstate->return_msg, 0, sizeof(*qstate->return_msg));
- if(!parse_create_msg(pkt, prs, NULL, &(qstate->return_msg)->qinfo, &(qstate->return_msg)->rep, qstate->region)) {
- log_err("storeResponse: malloc failure: allocating incoming dns_msg");
- return 0;
- }
-
- /* Make sure that the RA flag is set (since the presence of
- * this module means that recursion is available) */
- /* qstate->return_msg->rep->flags |= BIT_RA; */
-
- /* Clear the AA flag */
- /* FIXME: does this action go here or in some other module? */
- /*qstate->return_msg->rep->flags &= ~BIT_AA; */
-
- /* make sure QR flag is on */
- /*qstate->return_msg->rep->flags |= BIT_QR; */
-
- if(verbosity >= VERB_ALGO)
- log_dns_msg("storeResponse: packet:", &qstate->return_msg->qinfo, qstate->return_msg->rep);
-
- return 1;
-}
-
-
-/* Convert reply->addr to string */
-void reply_addr2str(struct comm_reply* reply, char* dest, int maxlen)
-{
- int af = (int)((struct sockaddr_in*) &(reply->addr))->sin_family;
- void* sinaddr = &((struct sockaddr_in*) &(reply->addr))->sin_addr;
-
- if(af == AF_INET6)
- sinaddr = &((struct sockaddr_in6*)&(reply->addr))->sin6_addr;
- dest[0] = 0;
- if (inet_ntop(af, sinaddr, dest, (socklen_t)maxlen) == 0)
- return;
- dest[maxlen-1] = 0;
-}
projects / apple / network_cmds.git / blobdiff