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- Reformat pythonmod/pythonmod_utils.{c,h}.

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This commit is contained in:
George Thessalonikefs 2021-03-22 18:45:31 +01:00
parent 7d5050c729
commit a13d935153
3 changed files with 129 additions and 113 deletions
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1
doc/Changelog
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@ -1,6 +1,7 @@
22 March 2021: George
- Fix unused-function warning when compiling with --enable-dnscrypt.
- Fix for #367: fix memory leak when cannot bind to listening port.
- Reformat pythonmod/pythonmod_utils.{c,h}.
22 March 2021: Wouter
- Merge #449 from orbea: build: Add missing linker flags.

189
pythonmod/pythonmod_utils.c
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@ -5,18 +5,18 @@
* 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.
@ -56,113 +56,118 @@
#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)
/* 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)
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;
}
/* authoritative answer can't be stored in cache */
if (msgrep->authoritative) {
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);
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_type h;
struct lruhash_entry* e;
struct reply_info *r;
size_t i, j;
/* Invalidate the message associated with query_info stored in message cache */
void invalidateQueryInCache(struct module_qstate* qstate,
struct query_info* qinfo)
{
hashvalue_type 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);
}
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");
}
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;
}
struct msg_parse* prs;
struct edns_data edns;
memset(prs, 0, sizeof(*prs));
memset(&edns, 0, sizeof(edns));
/* parse message */
prs = (struct msg_parse*) regional_alloc(qstate->env->scratch,
sizeof(struct msg_parse));
if(!prs) {
log_err("createResponse: out of memory on incoming message");
return 0;
}
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, qstate->env->scratch) !=
LDNS_RCODE_NOERROR)
return 0;
memset(prs, 0, sizeof(*prs));
memset(&edns, 0, sizeof(edns));
/* remove CD-bit, we asked for in case we handle validation ourself */
prs->flags &= ~BIT_CD;
sldns_buffer_set_position(pkt, 0);
if(parse_packet(pkt, prs, qstate->env->scratch) != LDNS_RCODE_NOERROR) {
verbose(VERB_ALGO, "createResponse: parse error on reply packet");
return 0;
}
/* edns is not examined, but removed from message to help cache */
if(parse_extract_edns(prs, &edns, qstate->env->scratch) !=
LDNS_RCODE_NOERROR)
return 0;
/* 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;
/* remove CD-bit, we asked for in case we handle validation ourself */
prs->flags &= ~BIT_CD;
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; */
/* 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;
/* Clear the AA flag */
/* FIXME: does this action go here or in some other module? */
/*qstate->return_msg->rep->flags &= ~BIT_AA; */
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("createResponse: malloc failure: allocating incoming dns_msg");
return 0;
}
/* make sure QR flag is on */
/*qstate->return_msg->rep->flags |= BIT_QR; */
/* 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; */
if(verbosity >= VERB_ALGO)
log_dns_msg("storeResponse: packet:", &qstate->return_msg->qinfo, qstate->return_msg->rep);
/* Clear the AA flag */
/* FIXME: does this action go here or in some other module? */
/*qstate->return_msg->rep->flags &= ~BIT_AA; */
return 1;
/* make sure QR flag is on */
/*qstate->return_msg->rep->flags |= BIT_QR; */
if(verbosity >= VERB_ALGO)
log_dns_msg("createResponse: packet:", &qstate->return_msg->qinfo,
qstate->return_msg->rep);
return 1;
}
@ -176,7 +181,7 @@ void reply_addr2str(struct comm_reply* reply, char* dest, int maxlen)
sinaddr = &((struct sockaddr_in6*)&(reply->addr))->sin6_addr;
dest[0] = 0;
if (inet_ntop(af, sinaddr, dest, (socklen_t)maxlen) == 0)
return;
return;
dest[maxlen-1] = 0;
}
@ -190,6 +195,6 @@ void delegpt_addr_addr2str(struct delegpt_addr* target, char *dest, int maxlen)
sinaddr = &((struct sockaddr_in6*)&(target->addr))->sin6_addr;
dest[0] = 0;
if (inet_ntop(af, sinaddr, dest, (socklen_t)maxlen) == 0)
return;
return;
dest[maxlen-1] = 0;
}

52
pythonmod/pythonmod_utils.h
View File

@ -1,22 +1,22 @@
/*
* pythonmod_utils.h: utils header file
*
*
* 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.
@ -46,34 +46,38 @@ struct delegpt_addr;
struct sldns_buffer;
/**
* Store the reply_info and query_info pair in message cache (qstate->msg_cache)
* Store the reply_info and query_info pair in message cache
* (qstate->msg_cache).
*
* @param qstate: module environment
* @param qinfo: query info, the query for which answer is stored.
* @param msgrep: reply in dns_msg
* @param is_referral: If true, then the given message to be stored is a
* referral. The cache implementation may use this as a hint.
* It will store only the RRsets, not the message.
* referral. The cache implementation may use this as a hint.
* It will store only the RRsets, not the message.
* @return 0 on alloc error (out of memory).
*/
int storeQueryInCache(struct module_qstate* qstate, struct query_info* qinfo, struct reply_info* msgrep, int is_referral);
int storeQueryInCache(struct module_qstate* qstate, struct query_info* qinfo,
struct reply_info* msgrep, int is_referral);
/**
* Invalidate the message associated with query_info stored in message cache.
* Invalidate the message associated with query_info stored in message cache.
*
* This function invalidates the record in message cache associated with the given query only if such a record exists.
* This function invalidates the record in message cache associated with the
* given query only if such a record exists.
*
* @param qstate: module environment
* @param qinfo: query info, the query for which answer is stored.
*/
void invalidateQueryInCache(struct module_qstate* qstate, struct query_info* qinfo);
void invalidateQueryInCache(struct module_qstate* qstate,
struct query_info* qinfo);
/**
* Create response according to the ldns packet content
* Create response according to the ldns packet content.
*
* This function fills qstate.return_msg up with data of a given packet
*
* This function fills qstate.return_msg up with data of a given packet
*
* @param qstate: module environment
* @param pkt: a sldns_buffer which contains sldns_packet data
* @return 0 on failure, out of memory or parse error.
@ -81,14 +85,20 @@ void invalidateQueryInCache(struct module_qstate* qstate, struct query_info* qin
int createResponse(struct module_qstate* qstate, struct sldns_buffer* pkt);
/**
* Convert reply->addr to string
* @param reply: comm reply with address in it.
* @param dest: destination string.
* @param maxlen: length of string buffer.
* Convert reply->addr to string.
* @param reply: comm reply with address in it.
* @param dest: destination string.
* @param maxlen: length of string buffer.
*/
void reply_addr2str(struct comm_reply* reply, char* dest, int maxlen);
/* Convert target->addr to string */
void delegpt_addr_addr2str(struct delegpt_addr* target, char *dest, int maxlen);
/**
* Convert target->addr to string.
* @param target: delegpt_addr with address in it.
* @param dest: destination string.
* @param maxlen: length of string buffer.
*/
void delegpt_addr_addr2str(struct delegpt_addr* target, char *dest,
int maxlen);
#endif /* PYTHONMOD_UTILS_H */