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Fix NPE (Issue #42)

This commit is contained in:
Neel Goyal 2013-12-09 12:55:33 -05:00
parent 031f26801a
commit db23854041
2 changed files with 27 additions and 8 deletions
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30
src/context.c
View File

@ -66,6 +66,7 @@ static void cancel_dns_req(getdns_dns_req *);
/* Stuff to make it compile pedantically */
#define UNUSED_PARAM(x) ((void)(x))
#define RETURN_IF_NULL(ptr, code) if(ptr == NULL) return code;
/**
* Helper to get default lookup namespaces.
@ -394,6 +395,7 @@ getdns_context_set_context_update_callback(struct getdns_context *context,
void (*value) (struct getdns_context *context, uint16_t changed_item)
)
{
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
context->update_callback = value;
return GETDNS_RETURN_GOOD;
} /* getdns_context_set_context_update_callback */
@ -435,7 +437,7 @@ clear_resolution_type_set_flag(struct getdns_context *context, uint16_t type)
getdns_return_t
getdns_context_set_context_update(struct getdns_context *context, uint16_t value)
{
UNUSED_PARAM(context);
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
UNUSED_PARAM(value);
return GETDNS_RETURN_GOOD;
} /* getdns_context_set_context_update */
@ -458,6 +460,7 @@ dispatch_updated(struct getdns_context *context, uint16_t item)
getdns_return_t
getdns_context_set_resolution_type(struct getdns_context *context, uint16_t value)
{
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
if (value != GETDNS_CONTEXT_STUB && value != GETDNS_CONTEXT_RECURSING) {
return GETDNS_RETURN_CONTEXT_UPDATE_FAIL;
}
@ -477,6 +480,7 @@ getdns_return_t
getdns_context_set_namespaces(struct getdns_context *context,
size_t namespace_count, uint16_t * namespaces)
{
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
if (namespace_count == 0 || namespaces == NULL) {
return GETDNS_RETURN_CONTEXT_UPDATE_FAIL;
}
@ -502,7 +506,7 @@ getdns_context_set_namespaces(struct getdns_context *context,
getdns_return_t
getdns_context_set_dns_transport(struct getdns_context *context, uint16_t value)
{
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
switch (value) {
case GETDNS_CONTEXT_UDP_FIRST_AND_FALL_BACK_TO_TCP:
set_ub_string_opt(context, "do-udp", "yes");
@ -534,6 +538,7 @@ getdns_return_t
getdns_context_set_limit_outstanding_queries(struct getdns_context *context,
uint16_t limit)
{
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
/* num-queries-per-thread */
set_ub_number_opt(context, "num-queries-per-thread", limit);
@ -550,6 +555,7 @@ getdns_context_set_limit_outstanding_queries(struct getdns_context *context,
getdns_return_t
getdns_context_set_timeout(struct getdns_context *context, uint16_t timeout)
{
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
context->timeout = timeout;
dispatch_updated(context, GETDNS_CONTEXT_CODE_TIMEOUT);
@ -564,6 +570,7 @@ getdns_context_set_timeout(struct getdns_context *context, uint16_t timeout)
getdns_return_t
getdns_context_set_follow_redirects(struct getdns_context *context, uint16_t value)
{
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
context->follow_redirects = value;
clear_resolution_type_set_flag(context, GETDNS_CONTEXT_RECURSING);
@ -582,6 +589,7 @@ getdns_context_set_dns_root_servers(struct getdns_context *context,
{
struct getdns_list *copy = NULL;
size_t count = 0;
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
if (addresses != NULL) {
if (getdns_list_copy(addresses, &copy) != GETDNS_RETURN_GOOD) {
return GETDNS_RETURN_CONTEXT_UPDATE_FAIL;
@ -627,6 +635,7 @@ getdns_context_set_dns_root_servers(struct getdns_context *context,
getdns_return_t
getdns_context_set_append_name(struct getdns_context *context, uint16_t value)
{
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
if (value != GETDNS_CONTEXT_APPEND_NAME_ALWAYS &&
value !=
GETDNS_CONTEXT_APPEND_NAME_ONLY_TO_SINGLE_LABEL_AFTER_FAILURE
@ -651,6 +660,7 @@ getdns_return_t
getdns_context_set_suffix(struct getdns_context *context, struct getdns_list * value)
{
struct getdns_list *copy = NULL;
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
if (value != NULL) {
if (getdns_list_copy(value, &copy) != GETDNS_RETURN_GOOD) {
return GETDNS_RETURN_CONTEXT_UPDATE_FAIL;
@ -676,6 +686,7 @@ getdns_context_set_dnssec_trust_anchors(struct getdns_context *context,
struct getdns_list * value)
{
struct getdns_list *copy = NULL;
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
if (value != NULL) {
if (getdns_list_copy(value, &copy) != GETDNS_RETURN_GOOD) {
return GETDNS_RETURN_CONTEXT_UPDATE_FAIL;
@ -698,6 +709,7 @@ getdns_return_t
getdns_context_set_dnssec_allowed_skew(struct getdns_context *context,
uint16_t value)
{
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
set_ub_number_opt(context, "val-sig-skew-min", value);
set_ub_number_opt(context, "val-sig-skew-max", value);
dispatch_updated(context, GETDNS_CONTEXT_CODE_DNSSEC_ALLOWED_SKEW);
@ -715,6 +727,7 @@ getdns_context_set_stub_resolution(struct getdns_context *context,
{
size_t count = 0;
size_t i = 0;
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
getdns_return_t r = getdns_list_get_length(upstream_list, &count);
if (count == 0 || r != GETDNS_RETURN_GOOD) {
return GETDNS_RETURN_CONTEXT_UPDATE_FAIL;
@ -758,6 +771,7 @@ getdns_return_t
getdns_context_set_edns_maximum_udp_payload_size(struct getdns_context *context,
uint16_t value)
{
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
/* check for < 512. uint16_t won't let it go above max) */
if (value < 512) {
return GETDNS_RETURN_CONTEXT_UPDATE_FAIL;
@ -779,6 +793,7 @@ getdns_context_set_edns_maximum_udp_payload_size(struct getdns_context *context,
getdns_return_t
getdns_context_set_edns_extended_rcode(struct getdns_context *context, uint8_t value)
{
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
context->edns_extended_rcode = value;
dispatch_updated(context, GETDNS_CONTEXT_CODE_EDNS_EXTENDED_RCODE);
@ -793,6 +808,7 @@ getdns_context_set_edns_extended_rcode(struct getdns_context *context, uint8_t v
getdns_return_t
getdns_context_set_edns_version(struct getdns_context *context, uint8_t value)
{
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
context->edns_version = value;
dispatch_updated(context, GETDNS_CONTEXT_CODE_EDNS_VERSION);
@ -807,6 +823,7 @@ getdns_context_set_edns_version(struct getdns_context *context, uint8_t value)
getdns_return_t
getdns_context_set_edns_do_bit(struct getdns_context *context, uint8_t value)
{
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
/* 0 or 1 */
if (value > 1) {
return GETDNS_RETURN_CONTEXT_UPDATE_FAIL;
@ -832,9 +849,7 @@ getdns_context_set_extended_memory_functions(
void (*free) (void *userarg, void *)
)
{
if (!context)
return GETDNS_RETURN_BAD_CONTEXT;
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
if (!malloc || !realloc || !free)
return GETDNS_RETURN_CONTEXT_UPDATE_FAIL;
@ -877,6 +892,7 @@ getdns_return_t
getdns_extension_set_libevent_base(struct getdns_context *context,
struct event_base * this_event_base)
{
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
if (this_event_base) {
ub_ctx_set_event(context->unbound_async, this_event_base);
context->event_base_async = this_event_base;
@ -912,6 +928,7 @@ getdns_context_cancel_request(struct getdns_context *context,
getdns_transaction_t transaction_id, int fire_callback)
{
getdns_dns_req *req = NULL;
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
/* delete the node from the tree */
ldns_rbnode_t *node = ldns_rbtree_delete(context->outbound_requests,
@ -974,6 +991,7 @@ ub_setup_stub(struct ub_ctx *ctx, struct getdns_list * upstreams, size_t count)
getdns_return_t
getdns_context_prepare_for_resolution(struct getdns_context *context)
{
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
if (context->resolution_type_set == context->resolution_type) {
/* already set and no config changes have caused this to be
* bad.
@ -1066,7 +1084,7 @@ getdns_bindata_copy(struct mem_funcs *mfs,
if (!src)
return NULL;
dst = GETDNS_MALLOC(*mfs, struct getdns_bindata);
if (!dst)
return NULL;

5
src/sync.c
View File

@ -9,7 +9,7 @@
/*
* Copyright (c) 2013, Versign, Inc.
* All rights reserved.
*
*
* 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
@ -49,6 +49,7 @@
/* stuff to make it compile pedantically */
#define UNUSED_PARAM(x) ((void)(x))
#define RETURN_IF_NULL(ptr, code) if(ptr == NULL) return code;
static void
sync_callback_func(struct getdns_context *context,
@ -68,7 +69,7 @@ getdns_general_sync(struct getdns_context *context,
struct getdns_dict **response)
{
getdns_return_t response_status;
RETURN_IF_NULL(context, GETDNS_RETURN_BAD_CONTEXT);
response_status = validate_extensions(extensions);
if (response_status == GETDNS_RETURN_GOOD) {
response_status = getdns_general_ub(context->unbound_sync,