You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
*/
/**
* @file nat/test_stun.c
* @brief Testcase for STUN library
* @author Bruno Souza Cabral
- * @autor Mark Spencer (Original code borrowed from Asterisk)
- *
+ * @author Christian Grothoff
*/
#include "gnunet_nat_lib.h"
-#include "test_stun.h"
+
+#define LOG(kind,...) GNUNET_log_from (kind, "test-stun", __VA_ARGS__)
+
+/**
+ * Time to wait before stopping NAT, in seconds
+ */
+#define TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)
/**
static int ret = 1;
+static const char *stun_server = "stun.gnunet.org";
+
+static int stun_port = 3478;
+
/**
* The listen socket of the service for IPv4
*/
static struct GNUNET_NETWORK_Handle *lsock4;
-
/**
* The listen task ID for IPv4
*/
-static struct GNUNET_SCHEDULER_Task * ltask4;
-
-
-static char *stun_server = STUN_SERVER;
-static int stun_port = STUN_PORT;
-
-static int stun_debug = 1;
-
-
-struct stun_strings {
- const int value;
- const char *name;
-};
-
-
-static inline int stun_msg2class(int msg)
-{
- return ((msg & 0x0010) >> 4) | ((msg & 0x0100) >> 7);
-}
-
-static inline int stun_msg2method(int msg)
-{
- return (msg & 0x000f) | ((msg & 0x00e0) >> 1) | ((msg & 0x3e00) >> 2);
-}
-
-static inline int stun_msg2type(int class, int method)
-{
- return ((class & 1) << 4) | ((class & 2) << 7) |
- (method & 0x000f) | ((method & 0x0070) << 1) | ((method & 0x0f800) << 2);
-}
-
-/* helper function to print message names */
-static const char *stun_msg2str(int msg)
-{
- static const struct stun_strings classes[] = {
- { STUN_REQUEST, "Request" },
- { STUN_INDICATION, "Indication" },
- { STUN_RESPONSE, "Response" },
- { STUN_ERROR_RESPONSE, "Error Response" },
- { 0, NULL }
-};
- static const struct stun_strings methods[] = {
- { STUN_BINDING, "Binding" },
- { 0, NULL }
-};
- static char result[32];
- const char *class = NULL, *method = NULL;
- int i, value;
-
- value = stun_msg2class(msg);
- for (i = 0; classes[i].name; i++) {
- class = classes[i].name;
- if (classes[i].value == value)
- break;
- }
- value = stun_msg2method(msg);
- for (i = 0; methods[i].name; i++) {
- method = methods[i].name;
- if (methods[i].value == value)
- break;
- }
- snprintf(result, sizeof(result), "%s %s",
- method ? : "Unknown Method",
- class ? : "Unknown Class Message");
- return result;
-}
-
-/* helper function to print attribute names */
-static const char *stun_attr2str(int msg)
-{
- static const struct stun_strings attrs[] = {
- { STUN_MAPPED_ADDRESS, "Mapped Address" },
- { STUN_RESPONSE_ADDRESS, "Response Address" },
- { STUN_CHANGE_ADDRESS, "Change Address" },
- { STUN_SOURCE_ADDRESS, "Source Address" },
- { STUN_CHANGED_ADDRESS, "Changed Address" },
- { STUN_USERNAME, "Username" },
- { STUN_PASSWORD, "Password" },
- { STUN_MESSAGE_INTEGRITY, "Message Integrity" },
- { STUN_ERROR_CODE, "Error Code" },
- { STUN_UNKNOWN_ATTRIBUTES, "Unknown Attributes" },
- { STUN_REFLECTED_FROM, "Reflected From" },
- { STUN_REALM, "Realm" },
- { STUN_NONCE, "Nonce" },
- { STUN_XOR_MAPPED_ADDRESS, "XOR Mapped Address" },
- { STUN_MS_VERSION, "MS Version" },
- { STUN_MS_XOR_MAPPED_ADDRESS, "MS XOR Mapped Address" },
- { STUN_SOFTWARE, "Software" },
- { STUN_ALTERNATE_SERVER, "Alternate Server" },
- { STUN_FINGERPRINT, "Fingerprint" },
- { 0, NULL }
-};
- int i;
-
- for (i = 0; attrs[i].name; i++) {
- if (attrs[i].value == msg)
- return attrs[i].name;
- }
- return "Unknown Attribute";
-}
-
-/* here we store credentials extracted from a message */
-struct stun_state {
- unsigned short attr;
-};
-
-static int stun_process_attr(struct stun_state *state, struct stun_attr *attr)
-{
- if (stun_debug)
- fprintf(stderr, "Found STUN Attribute %s (%04x), length %d\n",
- stun_attr2str(ntohs(attr->attr)), ntohs(attr->attr), ntohs(attr->len));
- switch (ntohs(attr->attr)) {
- case STUN_MAPPED_ADDRESS:
- case STUN_XOR_MAPPED_ADDRESS:
- case STUN_MS_XOR_MAPPED_ADDRESS:
- break;
- default:
- if (stun_debug)
- fprintf(stderr, "Ignoring STUN Attribute %s (%04x), length %d\n",
- stun_attr2str(ntohs(attr->attr)), ntohs(attr->attr), ntohs(attr->len));
- }
- return 0;
-}
-
-/* append a string to an STUN message */
-static void append_attr_string(struct stun_attr **attr, int attrval, const char *s, int *len, int *left)
-{
- int str_length = strlen(s);
- int attr_length = str_length + ((~(str_length - 1)) & 0x3);
- int size = sizeof(**attr) + attr_length;
- if (*left > size) {
- (*attr)->attr = htons(attrval);
- (*attr)->len = htons(attr_length);
- memcpy((*attr)->value, s, str_length);
- memset((*attr)->value + str_length, 0, attr_length - str_length);
- (*attr) = (struct stun_attr *)((*attr)->value + attr_length);
- *len += size;
- *left -= size;
- }
-}
+static struct GNUNET_SCHEDULER_Task *ltask4;
+/**
+ * Handle for the STUN request.
+ */
+static struct GNUNET_NAT_STUN_Handle *rh;
-/* helper function to generate a random request id */
-static void stun_req_id(struct stun_header *req)
-{
- int x;
- srand(time(0));
- req->magic = htonl(STUN_MAGIC_COOKIE);
- for (x = 0; x < 3; x++)
- req->id.id[x] = rand();
-}
-
-/* callback type to be invoked on stun responses. */
-typedef int (stun_cb_f)(struct stun_state *st, struct stun_attr *attr, void *arg, unsigned int magic);
-/* handle an incoming STUN message.
- *
- * Do some basic sanity checks on packet size and content,
- * try to extract a bit of information, and possibly reply.
- * At the moment this only processes BIND requests, and returns
- * the externally visible address of the request.
- * If a callback is specified, invoke it with the attribute.
- */
-static int stun_handle_packet(unsigned char *data, size_t len, stun_cb_f *stun_cb, void *arg)
+static void
+print_answer(struct sockaddr_in* answer)
{
- struct stun_header *hdr = (struct stun_header *)data;
- struct stun_attr *attr;
- struct stun_state st;
- int ret = STUN_IGNORE;
- int x;
-
- /* On entry, 'len' is the length of the udp payload. After the
- * initial checks it becomes the size of unprocessed options,
- * while 'data' is advanced accordingly.
- */
- if (len < sizeof(struct stun_header)) {
- fprintf(stderr, "Runt STUN packet (only %d, wanting at least %d)\n", (int) len, (int) sizeof(struct stun_header));
- return -1;
- }
- len -= sizeof(struct stun_header);
- data += sizeof(struct stun_header);
- x = ntohs(hdr->msglen); /* len as advertised in the message */
- if (stun_debug)
- fprintf(stderr, "STUN Packet, msg %s (%04x), length: %d\n", stun_msg2str(ntohs(hdr->msgtype)), ntohs(hdr->msgtype), x);
- if (x > len) {
- fprintf(stderr, "Scrambled STUN packet length (got %d, expecting %d)\n", x, (int)len);
- } else
- len = x;
- memset(&st,0, sizeof(st));
-
- while (len) {
- if (len < sizeof(struct stun_attr)) {
- fprintf(stderr, "Runt Attribute (got %d, expecting %d)\n", (int)len, (int) sizeof(struct stun_attr));
- break;
- }
- attr = (struct stun_attr *)data;
-
- /* compute total attribute length */
- x = ntohs(attr->len) + sizeof(struct stun_attr);
- if (x > len) {
- fprintf(stderr, "Inconsistent Attribute (length %d exceeds remaining msg len %d)\n", x, (int)len);
- break;
- }
- if (stun_cb)
- stun_cb(&st, attr, arg, hdr->magic);
- if (stun_process_attr(&st, attr)) {
- fprintf(stderr, "Failed to handle attribute %s (%04x)\n", stun_attr2str(ntohs(attr->attr)), ntohs(attr->attr));
- break;
- }
- /* Clear attribute id: in case previous entry was a string,
- * this will act as the terminator for the string.
- */
- attr->attr = 0;
- data += x;
- len -= x;
- }
- /* Null terminate any string.
- * XXX NOTE, we write past the size of the buffer passed by the
- * caller, so this is potentially dangerous. The only thing that
- * saves us is that usually we read the incoming message in a
- * much larger buffer
- */
- *data = '\0';
-
- return ret;
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "External IP is: %s , with port %d\n",
+ inet_ntoa (answer->sin_addr),
+ ntohs (answer->sin_port));
}
-/* Extract the STUN_MAPPED_ADDRESS from the stun response.
- * This is used as a callback for stun_handle_response
- * when called from stun_request.
- */
-static int stun_get_mapped(struct stun_state *st, struct stun_attr *attr, void *arg, unsigned int magic)
-{
- struct stun_addr *returned_addr = (struct stun_addr *)(attr + 1);
- struct sockaddr_in *sa = (struct sockaddr_in *)arg;
- unsigned short type = ntohs(attr->attr);
-
- switch (type) {
- case STUN_MAPPED_ADDRESS:
- if (st->attr == STUN_XOR_MAPPED_ADDRESS ||
- st->attr == STUN_MS_XOR_MAPPED_ADDRESS)
- return 1;
- magic = 0;
- break;
- case STUN_MS_XOR_MAPPED_ADDRESS:
- if (st->attr == STUN_XOR_MAPPED_ADDRESS)
- return 1;
- break;
- case STUN_XOR_MAPPED_ADDRESS:
- break;
- default:
- return 1;
- }
- if (ntohs(attr->len) < 8 && returned_addr->family != 1)
- return 1;
-
- st->attr = type;
- sa->sin_port = returned_addr->port ^ htons(ntohl(magic) >> 16);
- sa->sin_addr.s_addr = returned_addr->addr ^ magic;
- return 0;
-}
-/* Generic STUN request
- * Send a generic stun request to the server specified,
- * possibly waiting for a reply and filling the 'reply' field with
- * the externally visible address.
-
- * \param s the socket used to send the request
- * \return 0 on success, other values on error.
+/**
+ * Function that terminates the test.
*/
-int stun_request(struct GNUNET_NETWORK_Handle * sock)
-{
- struct stun_header *req;
- unsigned char reqdata[1024];
- int reqlen, reqleft;
- struct stun_attr *attr;
-
-
-
-
- struct sockaddr_in server;
- struct hostent *hostinfo = gethostbyname(stun_server);
- if (!hostinfo) {
- fprintf(stderr, "Error resolving host %s\n", stun_server);
- return -1;
- }
- memset(&server,0, sizeof(server));
- server.sin_family = AF_INET;
- server.sin_addr = *(struct in_addr*) hostinfo->h_addr;
- server.sin_port = htons(stun_port);
-
-
-
- req = (struct stun_header *)reqdata;
- stun_req_id(req);
- reqlen = 0;
- reqleft = sizeof(reqdata) - sizeof(struct stun_header);
- req->msgtype = 0;
- req->msglen = 0;
- attr = (struct stun_attr *)req->ies;
-
- append_attr_string(&attr, STUN_SOFTWARE, PACKAGE " v" VERSION_PACKAGE, &reqlen, &reqleft);
- req->msglen = htons(reqlen);
- req->msgtype = htons(stun_msg2type(STUN_REQUEST, STUN_BINDING));
-
-
- if (-1 == GNUNET_NETWORK_socket_sendto (sock, req, ntohs(req->msglen) + sizeof(*req),
- (const struct sockaddr *) &server, sizeof (server)))
- {
- GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "sendto");
- }
-
- return -1;
-}
-
-static void print_answer(struct sockaddr_in* answer)
+static void
+stop ()
{
- printf("External IP is: %s , with port %d\n", inet_ntoa(answer->sin_addr), ntohs(answer->sin_port));
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "Stopping NAT and quitting...\n");
+ if (NULL != ltask4)
+ {
+ GNUNET_SCHEDULER_cancel (ltask4);
+ ltask4 = NULL;
+ }
+ if(NULL != lsock4)
+ {
+ GNUNET_NETWORK_socket_close(lsock4);
+ lsock4 = NULL;
+ }
+ if (NULL != rh)
+ {
+ GNUNET_NAT_stun_make_request_cancel (rh);
+ rh = NULL;
+ }
}
* Activity on our incoming socket. Read data from the
* incoming connection.
*
- * @param cls
+ * @param cls
* @param tc scheduler context
*/
static void
do_udp_read (void *cls,
const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- //struct GNUNET_NAT_Test *tst = cls;
- unsigned char reply_buf[1024];
- ssize_t rlen;
- struct sockaddr_in answer;
-
-
- if ((0 != (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY)) &&
- (GNUNET_NETWORK_fdset_isset (tc->read_ready,
- lsock4)))
- {
- rlen = GNUNET_NETWORK_socket_recv (lsock4, reply_buf, sizeof (reply_buf));
- printf("Recivied something of size %d", rlen);
-
- //Lets handle the packet
- memset(&answer, 0, sizeof(struct sockaddr_in));
- stun_handle_packet(reply_buf, rlen, stun_get_mapped, &answer);
- //Print the anser
- //TODO: Delete the object
- ret = 0;
- print_answer(&answer);
-
-
- }
+ //struct GNUNET_NAT_Test *tst = cls;
+ unsigned char reply_buf[1024];
+ ssize_t rlen;
+ struct sockaddr_in answer;
+
+ ltask4 = NULL;
+ if ( (0 == (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY)) ||
+ (! GNUNET_NETWORK_fdset_isset (tc->read_ready,
+ lsock4)) )
+ {
+ fprintf (stderr,
+ "Timeout waiting for STUN response\n");
+ stop();
+ }
+ rlen = GNUNET_NETWORK_socket_recv (lsock4,
+ reply_buf,
+ sizeof (reply_buf));
+ memset (&answer,
+ 0,
+ sizeof(struct sockaddr_in));
+ if (GNUNET_OK !=
+ GNUNET_NAT_stun_handle_packet (reply_buf,
+ rlen,
+ &answer))
+ {
+ fprintf (stderr,
+ "Unexpected UDP packet, trying to read more\n");
+ ltask4 = GNUNET_SCHEDULER_add_read_net (TIMEOUT,
+ lsock4,
+ &do_udp_read, NULL);
+ return;
+ }
+ ret = 0;
+ print_answer (&answer);
+ stop ();
}
* @return NULL on error
*/
static struct GNUNET_NETWORK_Handle *
- bind_v4 ()
+bind_v4 ()
{
- struct GNUNET_NETWORK_Handle *ls;
- struct sockaddr_in sa4;
- int eno;
+ struct GNUNET_NETWORK_Handle *ls;
+ struct sockaddr_in sa4;
+ int eno;
- memset (&sa4, 0, sizeof (sa4));
- sa4.sin_family = AF_INET;
- sa4.sin_port = htons (port);
+ memset (&sa4, 0, sizeof (sa4));
+ sa4.sin_family = AF_INET;
+ sa4.sin_port = htons (port);
#if HAVE_SOCKADDR_IN_SIN_LEN
- sa4.sin_len = sizeof (sa4);
-#endif
- ls = GNUNET_NETWORK_socket_create (AF_INET,
- SOCK_DGRAM,
- 0);
- if (NULL == ls)
- return NULL;
- if (GNUNET_OK !=
- GNUNET_NETWORK_socket_bind (ls, (const struct sockaddr *) &sa4,
- sizeof (sa4)))
- {
- eno = errno;
- GNUNET_NETWORK_socket_close (ls);
- errno = eno;
- return NULL;
- }
- return ls;
+ sa4.sin_len = sizeof (sa4);
+#endif
+ ls = GNUNET_NETWORK_socket_create (AF_INET,
+ SOCK_DGRAM,
+ 0);
+ if (NULL == ls)
+ return NULL;
+ if (GNUNET_OK !=
+ GNUNET_NETWORK_socket_bind (ls,
+ (const struct sockaddr *) &sa4,
+ sizeof (sa4)))
+ {
+ eno = errno;
+ GNUNET_NETWORK_socket_close (ls);
+ errno = eno;
+ return NULL;
+ }
+ return ls;
}
-
/**
- * Main function run with scheduler.
+ * Function called with the result of the STUN request transmission attempt.
+ *
+ * @param cls unused
+ * @param error status code from STUN
*/
+static void
+request_callback (void *cls,
+ enum GNUNET_NAT_StatusCode error)
+{
+ rh = NULL;
+ if (GNUNET_NAT_ERROR_SUCCESS == error)
+ {
+ /* all good, start to receive */
+ ltask4 = GNUNET_SCHEDULER_add_read_net (TIMEOUT,
+ lsock4,
+ &do_udp_read,
+ NULL);
+ return;
+ }
+ if (error == GNUNET_NAT_ERROR_NOT_ONLINE)
+ {
+ ret = 77; /* report 'skip' */
+ fprintf (stderr,
+ "System is offline, cannot test STUN request.\n");
+ }
+ else
+ {
+ ret = error;
+ }
+ stop();
+}
+/**
+ * Main function run with scheduler.
+ */
static void
-run (void *cls, char *const *args, const char *cfgfile,
+run (void *cls,
+ char *const *args,
+ const char *cfgfile,
const struct GNUNET_CONFIGURATION_Handle *cfg)
{
-
-
- //Lets create the socket
- lsock4 = bind_v4 ();
- if (NULL == lsock4)
- {
- GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "bind");
- }
- else
- {
- printf("Binded, now will call add_read\n");
- //Lets call our function now when it accepts
- ltask4 = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
- lsock4, &do_udp_read, NULL);
-
- }
- if(NULL == lsock4 )
- {
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Service listens on port %u\n",
- port);
- printf("Start main event\n");
- stun_request(lsock4);
- //Main event
- //main_task = GNUNET_SCHEDULER_add_delayed (timeout, &do_timeout, nh);
-
+ //Lets create the socket
+ lsock4 = bind_v4 ();
+ if (NULL == lsock4)
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR,
+ "bind");
+ GNUNET_SCHEDULER_shutdown ();
+ return;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "Service listens on port %u\n",
+ port);
+ rh = GNUNET_NAT_stun_make_request (stun_server,
+ stun_port,
+ lsock4,
+ &request_callback, NULL);
+ GNUNET_SCHEDULER_add_delayed (TIMEOUT,
+ &stop, NULL);
}
int
main (int argc, char *const argv[])
{
- struct GNUNET_GETOPT_CommandLineOption options[] = {
- GNUNET_GETOPT_OPTION_END
- };
-
- char *const argv_prog[] = {
- "test-stun",
- NULL
- };
- GNUNET_log_setup ("test-stun",
- "WARNING",
- NULL);
-
- GNUNET_PROGRAM_run (1, argv_prog, "test-stun", "nohelp", options, &run, NULL);
-
- return ret;
+ struct GNUNET_GETOPT_CommandLineOption options[] = {
+ GNUNET_GETOPT_OPTION_END
+ };
+ char *const argv_prog[] = {
+ "test-stun",
+ "-c",
+ "test_stun.conf",
+ NULL
+ };
+ char *fn;
+ struct GNUNET_OS_Process *proc;
+
+ GNUNET_log_setup ("test-stun",
+ "WARNING",
+ NULL);
+
+ /* Lets start resolver */
+ fn = GNUNET_OS_get_libexec_binary_path ("gnunet-service-resolver");
+ proc = GNUNET_OS_start_process (GNUNET_YES,
+ GNUNET_OS_INHERIT_STD_OUT_AND_ERR,
+ NULL, NULL, NULL,
+ fn,
+ "gnunet-service-resolver",
+ "-c", "test_stun.conf", NULL);
+
+ if (NULL == proc)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "This test was unable to start gnunet-service-resolver, and it is required to run ...\n");
+ exit(1);
+ }
+
+ GNUNET_PROGRAM_run (3, argv_prog,
+ "test-stun", "nohelp",
+ options,
+ &run, NULL);
+
+ /* Now kill the resolver */
+ if (0 != GNUNET_OS_process_kill (proc, GNUNET_TERM_SIG))
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "kill");
+ }
+ GNUNET_OS_process_wait (proc);
+ GNUNET_OS_process_destroy (proc);
+ proc = NULL;
+ GNUNET_free (fn);
+
+ return ret;
}
-/* end of test_nat.c */
+/* end of test_stun.c */
projects / oweals / gnunet.git / blobdiff