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[GNUnet-SVN] r10703 - gnunet/src/util
From: |
gnunet |
Subject: |
[GNUnet-SVN] r10703 - gnunet/src/util |
Date: |
Mon, 29 Mar 2010 11:40:46 +0200 |
Author: wachs
Date: 2010-03-29 11:40:46 +0200 (Mon, 29 Mar 2010)
New Revision: 10703
Modified:
gnunet/src/util/test_resolver_api.c
Log:
Added code to test gnunet's dns resolver service. The test code compares
gnunet's results to the system's own forward and reverse name resolution. Using
dns root server as a targets to get a static 1:1 mapping
Modified: gnunet/src/util/test_resolver_api.c
===================================================================
--- gnunet/src/util/test_resolver_api.c 2010-03-28 15:22:14 UTC (rev 10702)
+++ gnunet/src/util/test_resolver_api.c 2010-03-29 09:40:46 UTC (rev 10703)
@@ -32,6 +32,11 @@
#define VERBOSE GNUNET_NO
+// Using dns rootservers to check gnunet's resolver service
+// a.root-servers.net <-> 198.41.0.4 is a fix 1:1 mapping that should not
change over years
+// For more information have a look at IANA's website
http://www.root-servers.org/
+#define ROOTSERVER_NAME "a.root-servers.net"
+#define ROOTSERVER_IP "198.41.0.4"
static void
check_hostname (void *cls, const struct sockaddr *sa, socklen_t salen)
@@ -123,6 +128,57 @@
}
static void
+check_rootserver_ip (void *cls, const struct sockaddr *sa, socklen_t salen)
+{
+ int *ok = cls;
+ const struct sockaddr_in *sai = (const struct sockaddr_in *) sa;
+
+ if (sa == NULL)
+ return;
+ GNUNET_assert (sizeof (struct sockaddr_in) == salen);
+
+ if ( 0 == strcmp(inet_ntoa(sai->sin_addr),ROOTSERVER_IP))
+ {
+#if DEBUG_RESOLVER
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received correct rootserver ip
address.\n");
+#endif
+ (*ok) &= ~1;
+ }
+ else
+ {
+#if DEBUG_RESOLVER
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received incorrect rootserver ip
address.\n");
+#endif
+ GNUNET_break (0);
+ }
+}
+
+static void
+check_rootserver_name (void *cls, const char *hostname)
+{
+ int *ok = cls;
+ if (hostname == NULL)
+ return;
+
+ if (0 == strcmp (hostname, ROOTSERVER_NAME))
+ {
+#if DEBUG_RESOLVER
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received correct rootserver hostname `%s'.\n", hostname);
+#endif
+ (*ok) &= ~2;
+ }
+ else
+ {
+#if DEBUG_RESOLVER
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received invalid rootserver hostname `%s'.\n", hostname);
+#endif
+ GNUNET_break (0);
+ }
+}
+
+static void
run (void *cls,
struct GNUNET_SCHEDULER_Handle *sched,
char *const *args,
@@ -152,6 +208,119 @@
GNUNET_RESOLVER_hostname_resolve (sched,
cfg,
AF_UNSPEC, timeout, &check_hostname, cls);
+ // Testing non-local dns resolution
+ // DNS Rootserver to test: a.root-servers.net - 198.41.0.4
+
+ char const * rootserver_name = ROOTSERVER_NAME;
+
+ struct hostent *rootserver;
+
+ rootserver = gethostbyname(rootserver_name);
+ if (rootserver == NULL)
+ {
+ // Error: resolving ip addresses does not work
+ #if DEBUG_RESOLVER
+ switch (h_errno)
+ {
+
+ case HOST_NOT_FOUND: GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"gethostbyname() could not lookup ip address: HOST_NOT_FOUND\n");break;
+ case NO_ADDRESS: GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "gethostbyname()
could not lookup ip address: NO_ADDRESS\n");break;
+ case NO_RECOVERY: GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "gethostbyname()
could not lookup ip address: NO_RECOVERY\n");break;
+ case TRY_AGAIN: GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "gethostbyname()
could not lookup ip address: TRY_AGAIN\n");break;
+ }
+ #endif
+ GNUNET_break (0);
+ }
+ else
+ {
+ // Counting returned ip addresses
+ int count_ips =0 ;
+ while (rootserver->h_addr_list[count_ips]!=NULL)
+ {
+ count_ips++;
+ }
+ if ( count_ips > 1)
+ {
+ #if DEBUG_RESOLVER
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received ip range for root name
server, but a root nameserver has only 1 ip\n");
+ #endif
+ GNUNET_break (0);
+ }
+
+ // Comparing to resolved address to the address the root nameserver should
have
+ if ( strcmp(inet_ntoa( *(struct in_addr *)
rootserver->h_addr_list[0]),ROOTSERVER_IP) !=0)
+ {
+ #if DEBUG_RESOLVER
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received ip and ip for root name
server differ\n");
+ #endif
+ GNUNET_break (0);
+ }
+
+ #if DEBUG_RESOLVER
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO, "System's own forward name
resolution is working\n");
+ #endif
+
+ // Resolve the same using GNUNET
+ GNUNET_RESOLVER_ip_get (sched, cfg, ROOTSERVER_NAME, AF_INET, timeout,
&check_rootserver_ip, cls);
+
+ // Success: forward lookups work as exptected
+
+
+ // Next step: reverse lookups
+
+ struct in_addr rootserver_addr;
+ rootserver->h_name="";
+ if ( 1 != inet_pton(AF_INET, ROOTSERVER_IP, &rootserver_addr))
+ {
+ #if DEBUG_RESOLVER
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Could not transform root
nameserver ip addressr\n");
+ #endif
+ GNUNET_break (0);
+ }
+
+ rootserver = gethostbyaddr(&rootserver_addr, sizeof(rootserver_addr),
AF_INET);
+ if (rootserver == NULL)
+ {
+ // Error: resolving ip addresses does not work
+ #if DEBUG_RESOLVER
+ switch (h_errno)
+ {
+
+ case HOST_NOT_FOUND: GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"gethostbyaddr() could not lookup ip address: HOST_NOT_FOUND\n");break;
+ case NO_ADDRESS: GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "gethostbyaddr()
could not lookup ip address: NO_ADDRESS\n");break;
+ case NO_RECOVERY: GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "gethostbyaddr()
could not lookup ip address: NO_RECOVERY\n");break;
+ case TRY_AGAIN: GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "gethostbyaddr()
could not lookup ip address: TRY_AGAIN\n");break;
+ }
+ #endif
+ GNUNET_break (0);
+ }
+
+ if ( 0 != strcmp( rootserver->h_name,ROOTSERVER_NAME))
+ {
+ #if DEBUG_RESOLVER
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received hostname and hostname
for root name server differ\n");
+ #endif
+ GNUNET_break (0);
+ }
+
+ #if DEBUG_RESOLVER
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO, "System's own reverse name
resolution is working\n");
+ #endif
+ // Resolve the same using GNUNET
+
+ memset (&sa, 0, sizeof (sa));
+ sa.sin_family = AF_INET;
+ inet_aton(ROOTSERVER_IP, &sa.sin_addr.s_addr);
+
+ GNUNET_RESOLVER_hostname_get (sched,
+ cfg,
+ (const struct sockaddr *) &sa,
+ sizeof (struct sockaddr),
+ GNUNET_YES,
+ timeout, &check_rootserver_name, cls);
+
+ // Success: reverse lookups work as exptected
+ }
}
static int
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