struct GNS_ResolverHandle *rh;
/**
- * label/name corresponding to the authority
+ * label/name corresponding to the authority
*/
char *label;
-
+
/**
* #GNUNET_YES if the authority was a GNS authority,
* #GNUNET_NO if the authority was a DNS authority.
{
/**
- * The zone of the GNS authority
+ * The zone of the GNS authority
*/
struct GNUNET_CRYPTO_EccPublicSignKey gns_authority;
} dns_authority;
} authority_info;
-
+
};
/**
* Closure for #vpn_allocation_cb.
*/
-struct VpnContext
+struct VpnContext
{
- /**
+ /**
* Which resolution process are we processing.
*/
struct GNS_ResolverHandle *rh;
* Number of records serialized in 'rd_data'.
*/
unsigned int rd_count;
-
+
/**
* Serialized records.
*/
char *rd_data;
-
+
/**
* Number of bytes in 'rd_data'.
*/
/**
* Handle to a currenty pending resolution. On result (positive or
- * negative) the #GNS_ResultProcessor is called.
+ * negative) the #GNS_ResultProcessor is called.
*/
struct GNS_ResolverHandle
{
/**
- * DLL
+ * DLL
*/
struct GNS_ResolverHandle *next;
/**
- * DLL
+ * DLL
*/
struct GNS_ResolverHandle *prev;
/**
- * The top-level GNS authoritative zone to query
+ * The top-level GNS authoritative zone to query
*/
struct GNUNET_CRYPTO_EccPublicSignKey authority_zone;
/**
- * called when resolution phase finishes
+ * called when resolution phase finishes
*/
GNS_ResultProcessor proc;
-
+
/**
- * closure passed to proc
+ * closure passed to proc
*/
void* proc_cls;
/**
- * Handle for DHT lookups. should be NULL if no lookups are in progress
+ * Handle for DHT lookups. should be NULL if no lookups are in progress
*/
struct GNUNET_DHT_GetHandle *get_handle;
struct GNUNET_RESOLVER_RequestHandle *std_resolve;
/**
- * Pending Namestore task
+ * Pending Namestore lookup task
*/
struct GNUNET_NAMESTORE_QueueEntry *namestore_qe;
struct GNUNET_CONTAINER_HeapNode *dht_heap_node;
/**
- * DLL to store the authority chain
+ * DLL to store the authority chain
*/
struct AuthorityChain *ac_head;
/**
- * DLL to store the authority chain
+ * DLL to store the authority chain
*/
struct AuthorityChain *ac_tail;
GNUNET_SCHEDULER_TaskIdentifier task_id;
/**
- * The name to resolve
+ * The name to resolve
*/
char *name;
size_t name_resolution_pos;
/**
- * Use only cache
+ * Use only cache
*/
int only_cached;
/**
* We increment the loop limiter for each step in a recursive
- * resolution. If it passes our threshold (i.e. due to
+ * resolution. If it passes our threshold (i.e. due to
* self-recursion in the resolution, i.e CNAME fun), we stop.
*/
unsigned int loop_limiter;
};
+/**
+ * Active namestore caching operations.
+ */
+struct CacheOps
+{
+
+ /**
+ * Organized in a DLL.
+ */
+ struct CacheOps *next;
+
+ /**
+ * Organized in a DLL.
+ */
+ struct CacheOps *prev;
+
+ /**
+ * Pending Namestore caching task.
+ */
+ struct GNUNET_NAMESTORE_QueueEntry *namestore_qe_cache;
+
+};
+
+
/**
* Our handle to the namestore service
*/
*/
static struct GNS_ResolverHandle *rlh_tail;
+/**
+ * Organized in a DLL.
+ */
+static struct CacheOps *co_head;
+
+/**
+ * Organized in a DLL.
+ */
+static struct CacheOps *co_tail;
+
+
/**
* Global configuration.
*/
if ('_' != name[0])
return GNUNET_NO;
pos = &name[1];
- while (NULL != (dot = strchr (pos, '.')))
+ while (NULL != (dot = strchr (pos, '.')))
if ('_' != dot[1])
return GNUNET_NO;
else
/* Don't have this on W32, here's a naive implementation
* Was somehow removed on OS X ... */
void *
-memrchr (const void *s,
- int c,
+memrchr (const void *s,
+ int c,
size_t n)
{
const unsigned char *ucs = s;
/* done, this was the last one */
len = rh->name_resolution_pos;
rp = rh->name;
- rh->name_resolution_pos = 0;
+ rh->name_resolution_pos = 0;
}
else
{
len = rh->name_resolution_pos - (dot - rh->name) - 1;
rp = dot + 1;
rh->name_resolution_pos = dot - rh->name;
- }
- return GNUNET_strndup (rp, len);
+ }
+ return GNUNET_strndup (rp, len);
}
i++;
}
GNUNET_assert (i == n);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Transmitting standard DNS result with %u records\n",
n);
rh->proc (rh->proc_cls,
rh->dns_request = NULL;
GNUNET_SCHEDULER_cancel (rh->task_id);
rh->task_id = GNUNET_SCHEDULER_NO_TASK;
- p = GNUNET_DNSPARSER_parse ((const char *) dns,
+ p = GNUNET_DNSPARSER_parse ((const char *) dns,
dns_len);
if (NULL == p)
{
rh->name = GNUNET_strdup (p->answers[0].data.hostname);
start_resolver_lookup (rh);
GNUNET_DNSPARSER_free_packet (p);
- return;
+ return;
}
/* FIXME: add DNAME support */
rec = &p->answers[i];
else if (i < p->num_answers + p->num_authority_records)
rec = &p->authority_records[i - p->num_answers];
- else
+ else
rec = &p->authority_records[i - p->num_answers - p->num_authority_records];
/* As we copied the full DNS name to 'rh->ac_tail->label', this
should be the correct check to see if this record is actually
}
rh->proc (rh->proc_cls, rd_count - skip, rd);
GNS_resolver_lookup_cancel (rh);
- }
+ }
GNUNET_DNSPARSER_free_packet (p);
}
UINT16_MAX);
p->flags.opcode = GNUNET_TUN_DNS_OPCODE_QUERY;
p->flags.recursion_desired = 1;
- if (GNUNET_OK !=
+ if (GNUNET_OK !=
GNUNET_DNSPARSER_pack (p, 1024, &dns_request, &dns_request_length))
{
GNUNET_break (0);
* Merge it into our chain.
*
* @param rh resolution we are performing
- * @param cname value of the cname record we got for the current
+ * @param cname value of the cname record we got for the current
* authority chain tail
*/
static void
ac = GNUNET_new (struct AuthorityChain);
ac->rh = rh;
ac->gns_authority = GNUNET_YES;
- ac->authority_info.gns_authority = rh->ac_tail->authority_info.gns_authority;
+ ac->authority_info.gns_authority = rh->ac_tail->authority_info.gns_authority;
ac->label = resolver_lookup_get_next_label (rh);
/* tigger shortening */
- if (NULL != rh->shorten_key)
+ if (NULL != rh->shorten_key)
GNS_shorten_start (rh->ac_tail->label,
&ac->authority_info.gns_authority,
- rh->shorten_key);
+ rh->shorten_key);
/* add AC to tail */
GNUNET_CONTAINER_DLL_insert_tail (rh->ac_head,
rh->ac_tail,
* will match 'result_af' from the request
* @param address IP address (struct in_addr or struct in_addr6, depending on 'af')
* that the VPN allocated for the redirection;
- * traffic to this IP will now be redirected to the
+ * traffic to this IP will now be redirected to the
* specified target peer; NULL on error
*/
static void
{
switch (af)
{
- case AF_INET:
+ case AF_INET:
rd[i].record_type = GNUNET_DNSPARSER_TYPE_A;
rd[i].data_size = sizeof (struct in_addr);
rd[i].expiration_time = GNUNET_TIME_relative_to_absolute (VPN_TIMEOUT).abs_value_us;
break;
default:
GNUNET_assert (0);
- }
+ }
break;
}
}
GNUNET_assert (i < vpn_ctx->rd_count);
- handle_gns_resolution_result (rh,
+ handle_gns_resolution_result (rh,
vpn_ctx->rd_count,
rd);
GNUNET_free (vpn_ctx->rd_data);
"Resolution succeeded for `%s' in zone %s, got %u records\n",
rh->ac_tail->label,
GNUNET_NAMESTORE_z2s (&rh->ac_tail->authority_info.gns_authority),
- rd_count);
+ rd_count);
if (0 == rh->name_resolution_pos)
{
/* top-level match, are we done yet? */
GNS_resolver_lookup_cancel (rh);
return;
}
- handle_gns_cname_result (rh,
+ handle_gns_cname_result (rh,
cname);
GNUNET_free (cname);
- return;
+ return;
}
/* If A/AAAA was requested, but we got a VPN
record, we convert it to A/AAAA using GNUnet VPN */
GNUNET_break_op (0);
rh->proc (rh->proc_cls, 0, NULL);
GNS_resolver_lookup_cancel (rh);
- return;
+ return;
}
vpn = (const struct GNUNET_TUN_GnsVpnRecord *) rd[i].data;
vname = (const char *) &vpn[1];
rd_off++;
}
}
- GNUNET_free_non_null (cname);
+ GNUNET_free_non_null (cname);
}
break;
case GNUNET_DNSPARSER_TYPE_SOA:
}
}
if (NULL != soa)
- GNUNET_DNSPARSER_free_soa (soa);
+ GNUNET_DNSPARSER_free_soa (soa);
}
break;
case GNUNET_DNSPARSER_TYPE_MX:
}
}
if (NULL != mx)
- GNUNET_DNSPARSER_free_mx (mx);
+ GNUNET_DNSPARSER_free_mx (mx);
}
break;
case GNUNET_DNSPARSER_TYPE_SRV:
struct GNUNET_DNSPARSER_SrvRecord *srv;
off = 0;
- /* FIXME: passing rh->name here is is not necessarily what we want
+ /* FIXME: passing rh->name here is is not necessarily what we want
(SRV support not finished) */
srv = GNUNET_DNSPARSER_parse_srv (rh->name,
rd[i].data,
}
}
if (NULL != srv)
- GNUNET_DNSPARSER_free_srv (srv);
+ GNUNET_DNSPARSER_free_srv (srv);
}
break;
case GNUNET_NAMESTORE_TYPE_PKEY:
if (NULL != rh->shorten_key)
{
struct GNUNET_CRYPTO_EccPublicSignKey pub;
-
+
if (rd[i].data_size != sizeof (struct GNUNET_CRYPTO_EccPublicSignKey))
{
GNUNET_break_op (0);
break;
}
}
-
+
/* yes, we are done, return result */
rh->proc (rh->proc_cls, rd_off, rd_new);
GNS_resolver_lookup_cancel (rh);
- return;
+ return;
}
do_recurse:
/* need to recurse, check if we can */
GNUNET_break_op (0);
rh->proc (rh->proc_cls, 0, NULL);
GNS_resolver_lookup_cancel (rh);
- return;
+ return;
}
/* expand authority chain */
ac = GNUNET_new (struct AuthorityChain);
sizeof (struct GNUNET_CRYPTO_EccPublicSignKey));
ac->label = resolver_lookup_get_next_label (rh);
/* tigger shortening */
- if (NULL != rh->shorten_key)
+ if (NULL != rh->shorten_key)
GNS_shorten_start (rh->ac_tail->label,
&ac->authority_info.gns_authority,
- rh->shorten_key);
+ rh->shorten_key);
/* add AC to tail */
GNUNET_CONTAINER_DLL_insert_tail (rh->ac_head,
rh->ac_tail,
GNUNET_break_op (0);
rh->proc (rh->proc_cls, 0, NULL);
GNS_resolver_lookup_cancel (rh);
- return;
+ return;
}
/* find associated A/AAAA record */
sa = NULL;
GNUNET_break_op (0);
rh->proc (rh->proc_cls, 0, NULL);
GNS_resolver_lookup_cancel (rh);
- return;
+ return;
}
/* FIXME: might want to check if we support IPv4 here,
and otherwise skip this one and hope we find another */
GNUNET_break_op (0);
rh->proc (rh->proc_cls, 0, NULL);
GNS_resolver_lookup_cancel (rh);
- return;
+ return;
}
/* FIXME: might want to check if we support IPv6 here,
and otherwise skip this one and hope we find another */
GNS_resolver_lookup_cancel (rh);
return;
}
- handle_gns_cname_result (rh,
+ handle_gns_cname_result (rh,
cname);
GNUNET_free (cname);
return;
* Function called once the namestore has completed the request for
* caching a block.
*
- * @param cls closure with the 'struct GNS_ResolverHandle'
+ * @param cls closure with the `struct CacheOps`
* @param success #GNUNET_OK on success
* @param emsg error message
*/
int32_t success,
const char *emsg)
{
- struct GNS_ResolverHandle *rh = cls;
+ struct CacheOps *co = cls;
- rh->namestore_qe = NULL;
+ co->namestore_qe_cache = NULL;
if (NULL != emsg)
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_("Failed to cache GNS resolution: %s\n"),
emsg);
+ GNUNET_CONTAINER_DLL_remove (co_head,
+ co_tail,
+ co);
+ GNUNET_free (co);
}
const struct GNUNET_HashCode *key,
const struct GNUNET_PeerIdentity *get_path,
unsigned int get_path_length,
- const struct GNUNET_PeerIdentity *put_path,
+ const struct GNUNET_PeerIdentity *put_path,
unsigned int put_path_length,
enum GNUNET_BLOCK_Type type,
size_t size, const void *data)
struct GNS_ResolverHandle *rh = cls;
struct AuthorityChain *ac = rh->ac_tail;
const struct GNUNET_NAMESTORE_Block *block;
-
+ struct CacheOps *co;
+
GNUNET_DHT_get_stop (rh->get_handle);
rh->get_handle = NULL;
GNUNET_CONTAINER_heap_remove_node (rh->dht_heap_node);
- rh->dht_heap_node = NULL;
+ rh->dht_heap_node = NULL;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Handling response from the DHT\n");
if (size < sizeof (struct GNUNET_NAMESTORE_Block))
{
/* how did this pass DHT block validation!? */
GNUNET_break (0);
rh->proc (rh->proc_cls, 0, NULL);
GNS_resolver_lookup_cancel (rh);
- return;
+ return;
}
- block = data;
+ block = data;
if (size !=
- ntohl (block->purpose.size) +
+ ntohl (block->purpose.size) +
sizeof (struct GNUNET_CRYPTO_EccPublicSignKey) +
sizeof (struct GNUNET_CRYPTO_EccSignature))
{
GNUNET_break (0);
rh->proc (rh->proc_cls, 0, NULL);
GNS_resolver_lookup_cancel (rh);
- return;
+ return;
}
if (GNUNET_OK !=
GNUNET_NAMESTORE_block_decrypt (block,
return;
}
/* Cache well-formed blocks */
- rh->namestore_qe = GNUNET_NAMESTORE_block_cache (namestore_handle,
- block,
- &namestore_cache_continuation,
- rh);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Caching response from the DHT in namestore\n");
+ co = GNUNET_new (struct CacheOps);
+ co->namestore_qe_cache = GNUNET_NAMESTORE_block_cache (namestore_handle,
+ block,
+ &namestore_cache_continuation,
+ co);
+ GNUNET_CONTAINER_DLL_insert (co_head,
+ co_tail,
+ co);
}
* @param cls closure with the `struct GNS_ResolverHandle`
* @param block block that was stored in the namestore
*/
-static void
+static void
handle_namestore_block_response (void *cls,
const struct GNUNET_NAMESTORE_Block *block)
{
GNUNET_NAMESTORE_query_from_public_key (auth,
label,
&query);
+ GNUNET_assert (NULL != rh->namestore_qe);
rh->namestore_qe = NULL;
if ( (GNUNET_NO == rh->only_cached) &&
( (NULL == block) ||
"Starting DHT lookup for `%s' in zone %s\n",
ac->label,
GNUNET_NAMESTORE_z2s (&ac->authority_info.gns_authority));
+ GNUNET_assert (NULL == rh->get_handle);
rh->get_handle = GNUNET_DHT_get_start (dht_handle,
GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
&query,
GNS_resolver_lookup_cancel (rh);
return;
}
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Decrypting block from the namestore\n");
if (GNUNET_OK !=
GNUNET_NAMESTORE_block_decrypt (block,
auth,
&query,
&handle_namestore_block_response,
rh);
+ GNUNET_assert (NULL != rh->namestore_qe);
}
GNS_resolver_lookup_cancel (rh);
return;
}
- if (GNUNET_YES == rh->ac_tail->gns_authority)
- recursive_gns_resolution_namestore (rh);
- else
- recursive_dns_resolution (rh);
+ if (GNUNET_YES == rh->ac_tail->gns_authority)
+ recursive_gns_resolution_namestore (rh);
+ else
+ recursive_dns_resolution (rh);
}
default:
af = AF_UNSPEC;
break;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Doing standard DNS lookup for `%s'\n",
rh->name);
- rh->std_resolve = GNUNET_RESOLVER_ip_get (rh->name,
+ rh->std_resolve = GNUNET_RESOLVER_ip_get (rh->name,
af,
DNS_LOOKUP_TIMEOUT,
&handle_dns_result,
struct GNS_ResolverHandle *rh;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Starting lookup for `%s'\n",
+ (NULL == shorten_key)
+ ? "Starting lookup for `%s' with shortening disabled\n"
+ : "Starting lookup for `%s' with shortening enabled\n",
name);
rh = GNUNET_new (struct GNS_ResolverHandle);
GNUNET_CONTAINER_DLL_insert (rlh_head,
GNS_resolver_done ()
{
struct GNS_ResolverHandle *rh;
+ struct CacheOps *co;
/* abort active resolutions */
while (NULL != (rh = rlh_head))
{
rh->proc (rh->proc_cls, 0, NULL);
- GNS_resolver_lookup_cancel (rh);
+ GNS_resolver_lookup_cancel (rh);
+ }
+ while (NULL != (co = co_head))
+ {
+ GNUNET_CONTAINER_DLL_remove (co_head,
+ co_tail,
+ co);
+ GNUNET_NAMESTORE_cancel (co->namestore_qe_cache);
+ GNUNET_free (co);
}
GNUNET_CONTAINER_heap_destroy (dht_lookup_heap);
dht_lookup_heap = NULL;