*/
#include "platform.h"
#include "gnunet_hello_lib.h"
+#include "gnunet_constants.h"
#include "gnunet_connection_lib.h"
#include "gnunet_container_lib.h"
#include "gnunet_nat_lib.h"
#define DEBUG_TCP GNUNET_NO
-#define DEBUG_TCP_NAT GNUNET_YES
-
-/**
- * How long until we give up on transmitting the welcome message?
- */
-#define HOSTNAME_RESOLVE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)
-
+#define DEBUG_TCP_NAT GNUNET_NO
/**
* Initial handshake message for a session.
/**
* Port number, in network byte order.
*/
- uint16_t t_port GNUNET_PACKED;
+ uint16_t t4_port GNUNET_PACKED;
};
struct Plugin;
-/**
- * Local network addresses (actual IP address follows this struct).
- * PORT is NOT included!
- */
-struct LocalAddrList
-{
-
- /**
- * This is a doubly linked list.
- */
- struct LocalAddrList *next;
-
- /**
- * This is a doubly linked list.
- */
- struct LocalAddrList *prev;
-
- /**
- * Link to plugin.
- */
- struct Plugin *plugin;
-
- /**
- * Handle to NAT holes we've tried to punch for this address.
- */
- struct GNUNET_NAT_Handle *nat;
-
- /**
- * Pointer to a 'struct IPv4/V6TcpAddress' describing our external IP and port
- * as obtained from the NAT by automatic port mapping.
- */
- void *external_nat_address;
-
- /**
- * Number of bytes in 'external_nat_address'
- */
- size_t ena_size;
-
- /**
- * Number of bytes of the address that follow
- */
- size_t size;
-
-};
-
-
/**
* Information kept for each message that is yet to
* be transmitted.
struct GNUNET_CONNECTION_Handle *lsock;
/**
- * stdout pipe handle for the gnunet-nat-server process
- */
- struct GNUNET_DISK_PipeHandle *server_stdout;
-
- /**
- * stdout file handle (for reading) for the gnunet-nat-server process
- */
- const struct GNUNET_DISK_FileHandle *server_stdout_handle;
-
- /**
- * ID of select gnunet-nat-server stdout read task
+ * Our handle to the NAT module.
*/
- GNUNET_SCHEDULER_TaskIdentifier server_read_task;
-
- /**
- * The process id of the server process (if behind NAT)
- */
- struct GNUNET_OS_Process *server_proc;
+ struct GNUNET_NAT_Handle *nat;
/**
* List of open TCP sessions.
*/
struct GNUNET_SERVER_MessageHandler *handlers;
- /**
- * Handle for request of hostname resolution, non-NULL if pending.
- */
- struct GNUNET_RESOLVER_RequestHandle *hostname_dns;
-
/**
* Map of peers we have tried to contact behind a NAT
*/
struct GNUNET_CONTAINER_MultiHashMap *nat_wait_conns;
- /**
- * The external address given to us by the user. Used for HELLOs
- * and address validation.
- */
- char *external_address;
-
- /**
- * The internal address given to us by the user (or discovered).
- * Used for NAT traversal (ICMP method), but not as a 'validateable'
- * address in HELLOs.
- */
- char *internal_address;
-
- /**
- * Address given for us to bind to (ONLY).
- */
- char *bind_address;
-
- /**
- * use local addresses?
- */
- int use_localaddresses;
-
- /**
- * List of our IP addresses.
- */
- struct LocalAddrList *lal_head;
-
- /**
- * Tail of our IP address list.
- */
- struct LocalAddrList *lal_tail;
-
/**
* List of active TCP probes.
*/
*/
struct GNUNET_RESOLVER_RequestHandle *ext_dns;
+ /**
+ * How many more TCP sessions are we allowed to open right now?
+ */
+ unsigned long long max_connections;
+
/**
* ID of task used to update our addresses when one expires.
*/
*/
uint16_t adv_port;
- /**
- * Is this transport configured to be behind a NAT?
- */
- int behind_nat;
-
- /**
- * Has the NAT been punched?
- */
- int nat_punched;
-
- /**
- * Is this transport configured to allow connections to NAT'd peers?
- */
- int enable_nat_client;
+};
- /**
- * Should we run the gnunet-nat-server?
- */
- int enable_nat_server;
- /**
- * Are we allowed to try UPnP/PMP for NAT traversal?
- */
- int enable_upnp;
+/**
+ * Function to check if an inbound connection is acceptable.
+ * Mostly used to limit the total number of open connections
+ * we can have.
+ *
+ * @param cls the 'struct Plugin'
+ * @param ucred credentials, if available, otherwise NULL
+ * @param addr address
+ * @param addrlen length of address
+ * @return GNUNET_YES to allow, GNUNET_NO to deny, GNUNET_SYSERR
+ * for unknown address family (will be denied).
+ */
+static int
+plugin_tcp_access_check (void *cls,
+ const struct GNUNET_CONNECTION_Credentials *ucred,
+ const struct sockaddr *addr, socklen_t addrlen)
+{
+ struct Plugin *plugin = cls;
-};
+ if (0 == plugin->max_connections)
+ return GNUNET_NO;
+ plugin->max_connections--;
+ return GNUNET_YES;
+}
/**
* @param addrlen actual lenght of the address
*/
static void
-nat_port_map_callback (void *cls,
- int add_remove,
- const struct sockaddr *addr,
- socklen_t addrlen)
+tcp_nat_port_map_callback (void *cls, int add_remove,
+ const struct sockaddr *addr, socklen_t addrlen)
{
- struct LocalAddrList *lal = cls;
- struct Plugin *plugin = lal->plugin;
- int af;
+ struct Plugin *plugin = cls;
struct IPv4TcpAddress t4;
struct IPv6TcpAddress t6;
void *arg;
- uint16_t args;
+ size_t args;
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "NPMC called with %d for address `%s'\n", add_remove,
+ GNUNET_a2s (addr, addrlen));
/* convert 'addr' to our internal format */
- af = addr->sa_family;
- switch (af)
- {
- case AF_INET:
- t4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
- t6.t6_port = ((struct sockaddr_in *) addr)->sin_port;
- arg = &t4;
- args = sizeof (t4);
- break;
- case AF_INET6:
- memcpy (&t6.ipv6_addr,
- &((struct sockaddr_in6 *) addr)->sin6_addr,
- sizeof (struct in6_addr));
- t6.t6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
- arg = &t6;
- args = sizeof (t6);
- break;
- default:
- GNUNET_break (0);
- return;
- }
-
+ switch (addr->sa_family)
+ {
+ case AF_INET:
+ GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
+ t4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
+ t4.t4_port = ((struct sockaddr_in *) addr)->sin_port;
+ arg = &t4;
+ args = sizeof (t4);
+ break;
+ case AF_INET6:
+ GNUNET_assert (addrlen == sizeof (struct sockaddr_in6));
+ memcpy (&t6.ipv6_addr, &((struct sockaddr_in6 *) addr)->sin6_addr,
+ sizeof (struct in6_addr));
+ t6.t6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
+ arg = &t6;
+ args = sizeof (t6);
+ break;
+ default:
+ GNUNET_break (0);
+ return;
+ }
/* modify our published address list */
- if (GNUNET_YES == add_remove)
- {
- plugin->env->notify_address (plugin->env->cls,
- "tcp",
- arg, args, GNUNET_TIME_UNIT_FOREVER_REL);
- GNUNET_free_non_null (lal->external_nat_address);
- lal->external_nat_address = GNUNET_memdup (arg, args);
- lal->ena_size = args;
- }
- else
- {
- plugin->env->notify_address (plugin->env->cls,
- "tcp",
- arg, args, GNUNET_TIME_UNIT_ZERO);
- GNUNET_free_non_null (lal->external_nat_address);
- lal->ena_size = 0;
- }
-}
-
-
-/**
- * Add the given address to the list of 'local' addresses, thereby
- * making it a 'legal' address for this peer to have.
- *
- * @param plugin the plugin
- * @param arg the address, either an IPv4 or an IPv6 IP address
- * @param arg_size number of bytes in arg
- */
-static void
-add_to_address_list (struct Plugin *plugin,
- const void *arg,
- size_t arg_size)
-{
- struct LocalAddrList *lal;
- struct sockaddr_in v4;
- struct sockaddr_in6 v6;
- const struct sockaddr *sa;
- socklen_t salen;
-
- lal = plugin->lal_head;
- while (NULL != lal)
- {
- if ( (lal->size == arg_size) &&
- (0 == memcmp (&lal[1], arg, arg_size)) )
- return;
- lal = lal->next;
- }
- lal = GNUNET_malloc (sizeof (struct LocalAddrList) + arg_size);
- lal->plugin = plugin;
- lal->size = arg_size;
- memcpy (&lal[1], arg, arg_size);
- GNUNET_CONTAINER_DLL_insert (plugin->lal_head,
- plugin->lal_tail,
- lal);
- if (plugin->open_port == 0)
- return; /* we're not listening at all... */
- if (arg_size == sizeof (struct in_addr))
- {
- memset (&v4, 0, sizeof (v4));
- v4.sin_family = AF_INET;
- v4.sin_port = htons (plugin->open_port);
- memcpy (&v4.sin_addr, arg, arg_size);
-#if HAVE_SOCKADDR_IN_SIN_LEN
- v4.sin_len = sizeof (struct sockaddr_in);
-#endif
- sa = (const struct sockaddr*) &v4;
- salen = sizeof (v4);
- }
- else if (arg_size == sizeof (struct in6_addr))
- {
- memset (&v6, 0, sizeof (v6));
- v6.sin6_family = AF_INET6;
- v6.sin6_port = htons (plugin->open_port);
- memcpy (&v6.sin6_addr, arg, arg_size);
-#if HAVE_SOCKADDR_IN_SIN_LEN
- v6.sin6_len = sizeof (struct sockaddr_in6);
-#endif
- sa = (const struct sockaddr*) &v6;
- salen = sizeof (v6);
- }
- else
- {
- GNUNET_break (0);
- return;
- }
- if ( (plugin->behind_nat == GNUNET_YES) &&
- (plugin->enable_upnp == GNUNET_YES) )
- lal->nat = GNUNET_NAT_register (sa, salen,
- &nat_port_map_callback,
- lal);
-}
-
-
-/**
- * Check if the given address is in the list of 'local' addresses.
- *
- * @param plugin the plugin
- * @param arg the address, either an IPv4 or an IPv6 IP address
- * @param arg_size number of bytes in arg
- * @return GNUNET_OK if this is one of our IPs, GNUNET_SYSERR if not
- */
-static int
-check_local_addr (struct Plugin *plugin,
- const void *arg,
- size_t arg_size)
-{
- struct LocalAddrList *lal;
-
- lal = plugin->lal_head;
- while (NULL != lal)
- {
- if ( (lal->size == arg_size) &&
- (0 == memcmp (&lal[1], arg, arg_size)) )
- return GNUNET_OK;
- lal = lal->next;
- }
- return GNUNET_SYSERR;
-}
-
-
-/**
- * Check if the given address is in the list of 'mapped' addresses.
- *
- * @param plugin the plugin
- * @param arg the address, either a 'struct IPv4TcpAddress' or a 'struct IPv6TcpAddress'
- * @param arg_size number of bytes in arg
- * @return GNUNET_OK if this is one of our IPs, GNUNET_SYSERR if not
- */
-static int
-check_mapped_addr (struct Plugin *plugin,
- const void *arg,
- size_t arg_size)
-{
- struct LocalAddrList *lal;
-
- lal = plugin->lal_head;
- while (NULL != lal)
- {
- if ( (lal->ena_size == arg_size) &&
- (0 == memcmp (lal->external_nat_address, arg, arg_size)) )
- return GNUNET_OK;
- lal = lal->next;
- }
- return GNUNET_SYSERR;
+ plugin->env->notify_address (plugin->env->cls, add_remove, arg, args);
}
* @param addrlen length of the address
* @return string representing the same address
*/
-static const char*
-tcp_address_to_string (void *cls,
- const void *addr,
- size_t addrlen)
+static const char *
+tcp_address_to_string (void *cls, const void *addr, size_t addrlen)
{
static char rbuf[INET6_ADDRSTRLEN + 12];
char buf[INET6_ADDRSTRLEN];
uint16_t port;
if (addrlen == sizeof (struct IPv6TcpAddress))
- {
- t6 = addr;
- af = AF_INET6;
- port = ntohs (t6->t6_port);
- memcpy (&a6, &t6->ipv6_addr, sizeof (a6));
- sb = &a6;
- }
+ {
+ t6 = addr;
+ af = AF_INET6;
+ port = ntohs (t6->t6_port);
+ memcpy (&a6, &t6->ipv6_addr, sizeof (a6));
+ sb = &a6;
+ }
else if (addrlen == sizeof (struct IPv4TcpAddress))
- {
- t4 = addr;
- af = AF_INET;
- port = ntohs (t4->t_port);
- memcpy (&a4, &t4->ipv4_addr, sizeof (a4));
- sb = &a4;
- }
+ {
+ t4 = addr;
+ af = AF_INET;
+ port = ntohs (t4->t4_port);
+ memcpy (&a4, &t4->ipv4_addr, sizeof (a4));
+ sb = &a4;
+ }
else
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
- "tcp",
- _("Unexpected address length: %u bytes\n"),
- (unsigned int) addrlen);
- GNUNET_break (0);
- return NULL;
- }
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, "tcp",
+ _("Unexpected address length: %u bytes\n"),
+ (unsigned int) addrlen);
+ GNUNET_break (0);
+ return NULL;
+ }
if (NULL == inet_ntop (af, sb, buf, INET6_ADDRSTRLEN))
- {
- GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "inet_ntop");
- return NULL;
- }
- GNUNET_snprintf (rbuf,
- sizeof (rbuf),
- (af == AF_INET6) ? "[%s]:%u" : "%s:%u",
- buf,
- port);
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "inet_ntop");
+ return NULL;
+ }
+ GNUNET_snprintf (rbuf, sizeof (rbuf), (af == AF_INET6) ? "[%s]:%u" : "%s:%u",
+ buf, port);
return rbuf;
}
* @return new session object
*/
static struct Session *
-create_session (struct Plugin *plugin,
- const struct GNUNET_PeerIdentity *target,
- struct GNUNET_SERVER_Client *client,
- int is_nat)
+create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
+ struct GNUNET_SERVER_Client *client, int is_nat)
{
struct Session *ret;
struct PendingMessage *pm;
else
GNUNET_assert (client == NULL);
#if DEBUG_TCP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Creating new session for peer `%4s'\n",
- GNUNET_i2s (target));
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Creating new session for peer `%4s'\n",
+ GNUNET_i2s (target));
#endif
ret = GNUNET_malloc (sizeof (struct Session));
ret->last_activity = GNUNET_TIME_absolute_get ();
ret->plugin = plugin;
ret->is_nat = is_nat;
- if (is_nat != GNUNET_YES) /* If not a NAT WAIT conn, add it to global list */
- {
- ret->next = plugin->sessions;
- plugin->sessions = ret;
- }
+ if (is_nat != GNUNET_YES) /* If not a NAT WAIT conn, add it to global list */
+ {
+ ret->next = plugin->sessions;
+ plugin->sessions = ret;
+ }
ret->client = client;
ret->target = *target;
ret->expecting_welcome = GNUNET_YES;
- pm = GNUNET_malloc (sizeof (struct PendingMessage) + sizeof (struct WelcomeMessage));
- pm->msg = (const char*) &pm[1];
+ pm = GNUNET_malloc (sizeof (struct PendingMessage) +
+ sizeof (struct WelcomeMessage));
+ pm->msg = (const char *) &pm[1];
pm->message_size = sizeof (struct WelcomeMessage);
welcome.header.size = htons (sizeof (struct WelcomeMessage));
welcome.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_WELCOME);
memcpy (&pm[1], &welcome, sizeof (welcome));
pm->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# bytes currently in TCP buffers"),
- pm->message_size,
- GNUNET_NO);
+ gettext_noop ("# bytes currently in TCP buffers"),
+ pm->message_size, GNUNET_NO);
GNUNET_CONTAINER_DLL_insert (ret->pending_messages_head,
- ret->pending_messages_tail,
- pm);
+ ret->pending_messages_tail, pm);
if (is_nat != GNUNET_YES)
GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# TCP sessions active"),
- 1,
+ gettext_noop ("# TCP sessions active"), 1,
GNUNET_NO);
return ret;
}
*
* @param session for which session should we do this
*/
-static void process_pending_messages (struct Session *session);
+static void
+process_pending_messages (struct Session *session);
/**
char *cbuf;
size_t ret;
+ GNUNET_assert (session != NULL);
session->transmit_handle = NULL;
plugin = session->plugin;
if (buf == NULL)
- {
+ {
#if DEBUG_TCP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Timeout trying to transmit to peer `%4s', discarding message queue.\n",
- GNUNET_i2s (&session->target));
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Timeout trying to transmit to peer `%4s', discarding message queue.\n",
+ GNUNET_i2s (&session->target));
#endif
- /* timeout; cancel all messages that have already expired */
- hd = NULL;
- tl = NULL;
- ret = 0;
- now = GNUNET_TIME_absolute_get ();
- while ( (NULL != (pos = session->pending_messages_head)) &&
- (pos->timeout.abs_value <= now.abs_value) )
- {
- GNUNET_CONTAINER_DLL_remove (session->pending_messages_head,
- session->pending_messages_tail,
- pos);
+ /* timeout; cancel all messages that have already expired */
+ hd = NULL;
+ tl = NULL;
+ ret = 0;
+ now = GNUNET_TIME_absolute_get ();
+ while ((NULL != (pos = session->pending_messages_head)) &&
+ (pos->timeout.abs_value <= now.abs_value))
+ {
+ GNUNET_CONTAINER_DLL_remove (session->pending_messages_head,
+ session->pending_messages_tail, pos);
#if DEBUG_TCP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Failed to transmit %u byte message to `%4s'.\n",
- pos->message_size,
- GNUNET_i2s (&session->target));
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Failed to transmit %u byte message to `%4s'.\n",
+ pos->message_size, GNUNET_i2s (&session->target));
#endif
- ret += pos->message_size;
- GNUNET_CONTAINER_DLL_insert_after (hd, tl, tl, pos);
- }
- /* do this call before callbacks (so that if callbacks destroy
- session, they have a chance to cancel actions done by this
- call) */
- process_pending_messages (session);
- pid = session->target;
- /* no do callbacks and do not use session again since
- the callbacks may abort the session */
- while (NULL != (pos = hd))
- {
- GNUNET_CONTAINER_DLL_remove (hd, tl, pos);
- if (pos->transmit_cont != NULL)
- pos->transmit_cont (pos->transmit_cont_cls,
- &pid, GNUNET_SYSERR);
- GNUNET_free (pos);
- }
- GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# bytes currently in TCP buffers"),
- - (int64_t) ret,
- GNUNET_NO);
- GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# bytes discarded by TCP (timeout)"),
- ret,
- GNUNET_NO);
- return 0;
+ ret += pos->message_size;
+ GNUNET_CONTAINER_DLL_insert_after (hd, tl, tl, pos);
}
+ /* do this call before callbacks (so that if callbacks destroy
+ * session, they have a chance to cancel actions done by this
+ * call) */
+ process_pending_messages (session);
+ pid = session->target;
+ /* no do callbacks and do not use session again since
+ * the callbacks may abort the session */
+ while (NULL != (pos = hd))
+ {
+ GNUNET_CONTAINER_DLL_remove (hd, tl, pos);
+ if (pos->transmit_cont != NULL)
+ pos->transmit_cont (pos->transmit_cont_cls, &pid, GNUNET_SYSERR);
+ GNUNET_free (pos);
+ }
+ GNUNET_STATISTICS_update (plugin->env->stats,
+ gettext_noop ("# bytes currently in TCP buffers"),
+ -(int64_t) ret, GNUNET_NO);
+ GNUNET_STATISTICS_update (plugin->env->stats,
+ gettext_noop
+ ("# bytes discarded by TCP (timeout)"), ret,
+ GNUNET_NO);
+ return 0;
+ }
/* copy all pending messages that would fit */
ret = 0;
cbuf = buf;
hd = NULL;
tl = NULL;
while (NULL != (pos = session->pending_messages_head))
- {
- if (ret + pos->message_size > size)
- break;
- GNUNET_CONTAINER_DLL_remove (session->pending_messages_head,
- session->pending_messages_tail,
- pos);
- GNUNET_assert (size >= pos->message_size);
- /* FIXME: this memcpy can be up to 7% of our total runtime */
- memcpy (cbuf, pos->msg, pos->message_size);
- cbuf += pos->message_size;
- ret += pos->message_size;
- size -= pos->message_size;
- GNUNET_CONTAINER_DLL_insert_after (hd, tl, tl, pos);
- }
+ {
+ if (ret + pos->message_size > size)
+ break;
+ GNUNET_CONTAINER_DLL_remove (session->pending_messages_head,
+ session->pending_messages_tail, pos);
+ GNUNET_assert (size >= pos->message_size);
+ /* FIXME: this memcpy can be up to 7% of our total runtime */
+ memcpy (cbuf, pos->msg, pos->message_size);
+ cbuf += pos->message_size;
+ ret += pos->message_size;
+ size -= pos->message_size;
+ GNUNET_CONTAINER_DLL_insert_after (hd, tl, tl, pos);
+ }
/* schedule 'continuation' before callbacks so that callbacks that
- cancel everything don't cause us to use a session that no longer
- exists... */
+ * cancel everything don't cause us to use a session that no longer
+ * exists... */
process_pending_messages (session);
session->last_activity = GNUNET_TIME_absolute_get ();
pid = session->target;
/* we'll now call callbacks that may cancel the session; hence
- we should not use 'session' after this point */
+ * we should not use 'session' after this point */
while (NULL != (pos = hd))
- {
- GNUNET_CONTAINER_DLL_remove (hd, tl, pos);
- if (pos->transmit_cont != NULL)
- pos->transmit_cont (pos->transmit_cont_cls,
- &pid, GNUNET_OK);
- GNUNET_free (pos);
- }
+ {
+ GNUNET_CONTAINER_DLL_remove (hd, tl, pos);
+ if (pos->transmit_cont != NULL)
+ pos->transmit_cont (pos->transmit_cont_cls, &pid, GNUNET_OK);
+ GNUNET_free (pos);
+ }
GNUNET_assert (hd == NULL);
GNUNET_assert (tl == NULL);
#if DEBUG_TCP > 1
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Transmitting %u bytes\n",
- ret);
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp", "Transmitting %u bytes\n",
+ ret);
#endif
GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# bytes currently in TCP buffers"),
- - (int64_t) ret,
- GNUNET_NO);
+ gettext_noop ("# bytes currently in TCP buffers"),
+ -(int64_t) ret, GNUNET_NO);
GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# bytes transmitted via TCP"),
- ret,
- GNUNET_NO);
+ gettext_noop ("# bytes transmitted via TCP"), ret,
+ GNUNET_NO);
return ret;
}
if (NULL == (pm = session->pending_messages_head))
return;
- session->transmit_handle
- = GNUNET_SERVER_notify_transmit_ready (session->client,
- pm->message_size,
+ session->transmit_handle =
+ GNUNET_SERVER_notify_transmit_ready (session->client, pm->message_size,
GNUNET_TIME_absolute_get_remaining
- (pm->timeout),
- &do_transmit, session);
+ (pm->timeout), &do_transmit,
+ session);
}
struct PendingMessage *pm;
#if DEBUG_TCP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
"Disconnecting from `%4s' at %s.\n",
GNUNET_i2s (&session->target),
- (session->connect_addr != NULL) ?
- tcp_address_to_string (session->plugin,
- session->connect_addr,
- session->connect_alen) : "*");
+ (session->connect_addr !=
+ NULL) ? tcp_address_to_string (session->plugin,
+ session->connect_addr,
+ session->connect_alen) :
+ "*");
#endif
/* remove from session list */
prev = NULL;
pos = session->plugin->sessions;
while (pos != session)
- {
- prev = pos;
- pos = pos->next;
- }
+ {
+ prev = pos;
+ pos = pos->next;
+ }
if (prev == NULL)
session->plugin->sessions = session->next;
else
prev->next = session->next;
- session->plugin->env->session_end (session->plugin->env->cls,
- &session->target,
- session);
+
/* clean up state */
if (session->transmit_handle != NULL)
- {
- GNUNET_CONNECTION_notify_transmit_ready_cancel
- (session->transmit_handle);
- session->transmit_handle = NULL;
- }
+ {
+ GNUNET_CONNECTION_notify_transmit_ready_cancel (session->transmit_handle);
+ session->transmit_handle = NULL;
+ }
+ session->plugin->env->session_end (session->plugin->env->cls,
+ &session->target, session);
while (NULL != (pm = session->pending_messages_head))
- {
+ {
#if DEBUG_TCP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- pm->transmit_cont != NULL
- ? "Could not deliver message to `%4s'.\n"
- : "Could not deliver message to `%4s', notifying.\n",
- GNUNET_i2s (&session->target));
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ pm->transmit_cont !=
+ NULL ? "Could not deliver message to `%4s'.\n" :
+ "Could not deliver message to `%4s', notifying.\n",
+ GNUNET_i2s (&session->target));
#endif
- GNUNET_STATISTICS_update (session->plugin->env->stats,
- gettext_noop ("# bytes currently in TCP buffers"),
- - (int64_t) pm->message_size,
- GNUNET_NO);
- GNUNET_STATISTICS_update (session->plugin->env->stats,
- gettext_noop ("# bytes discarded by TCP (disconnect)"),
- pm->message_size,
- GNUNET_NO);
- GNUNET_CONTAINER_DLL_remove (session->pending_messages_head,
- session->pending_messages_tail,
- pm);
- if (NULL != pm->transmit_cont)
- pm->transmit_cont (pm->transmit_cont_cls,
- &session->target, GNUNET_SYSERR);
- GNUNET_free (pm);
- }
+ GNUNET_STATISTICS_update (session->plugin->env->stats,
+ gettext_noop ("# bytes currently in TCP buffers"),
+ -(int64_t) pm->message_size, GNUNET_NO);
+ GNUNET_STATISTICS_update (session->plugin->env->stats,
+ gettext_noop
+ ("# bytes discarded by TCP (disconnect)"),
+ pm->message_size, GNUNET_NO);
+ GNUNET_CONTAINER_DLL_remove (session->pending_messages_head,
+ session->pending_messages_tail, pm);
+ if (NULL != pm->transmit_cont)
+ pm->transmit_cont (pm->transmit_cont_cls, &session->target,
+ GNUNET_SYSERR);
+ GNUNET_free (pm);
+ }
GNUNET_break (session->client != NULL);
if (session->receive_delay_task != GNUNET_SCHEDULER_NO_TASK)
- {
- GNUNET_SCHEDULER_cancel (session->receive_delay_task);
- if (session->client != NULL)
- GNUNET_SERVER_receive_done (session->client,
- GNUNET_SYSERR);
- }
- else if (session->client != NULL)
+ {
+ GNUNET_SCHEDULER_cancel (session->receive_delay_task);
+ if (session->client != NULL)
+ GNUNET_SERVER_receive_done (session->client, GNUNET_SYSERR);
+ }
+ if (session->client != NULL)
+ {
GNUNET_SERVER_client_drop (session->client);
+ session->client = NULL;
+ }
GNUNET_STATISTICS_update (session->plugin->env->stats,
- gettext_noop ("# TCP sessions active"),
- -1,
- GNUNET_NO);
+ gettext_noop ("# TCP sessions active"), -1,
+ GNUNET_NO);
GNUNET_free_non_null (session->connect_addr);
+ GNUNET_assert (NULL == session->transmit_handle);
GNUNET_free (session);
}
* @return "better" session (more active)
*/
static struct Session *
-select_better_session (struct Session *s1,
- struct Session *s2)
+select_better_session (struct Session *s1, struct Session *s2)
{
if (s1 == NULL)
return s2;
if (s2 == NULL)
return s1;
- if ( (s1->expecting_welcome == GNUNET_NO) &&
- (s2->expecting_welcome == GNUNET_YES) )
+ if ((s1->expecting_welcome == GNUNET_NO) &&
+ (s2->expecting_welcome == GNUNET_YES))
return s1;
- if ( (s1->expecting_welcome == GNUNET_YES) &&
- (s2->expecting_welcome == GNUNET_NO) )
+ if ((s1->expecting_welcome == GNUNET_YES) &&
+ (s2->expecting_welcome == GNUNET_NO))
return s2;
if (s1->last_activity.abs_value < s2->last_activity.abs_value)
return s2;
if (s1->last_activity.abs_value > s2->last_activity.abs_value)
return s1;
- if ( (GNUNET_YES == s1->inbound) &&
- (GNUNET_NO == s2->inbound) )
+ if ((GNUNET_YES == s1->inbound) && (GNUNET_NO == s2->inbound))
return s1;
- if ( (GNUNET_NO == s1->inbound) &&
- (GNUNET_YES == s2->inbound) )
+ if ((GNUNET_NO == s1->inbound) && (GNUNET_YES == s2->inbound))
return s2;
return s1;
}
-/**
- * We learned about a peer (possibly behind NAT) so run the
- * gnunet-nat-client to send dummy ICMP responses.
- *
- * @param plugin the plugin for this transport
- * @param sa the address of the peer (IPv4-only)
- */
-static void
-run_gnunet_nat_client (struct Plugin *plugin,
- const struct sockaddr_in *sa)
-{
- char inet4[INET_ADDRSTRLEN];
- char port_as_string[6];
- struct GNUNET_OS_Process *proc;
-
- if (plugin->internal_address == NULL)
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING,
- "tcp",
- _("Internal IP address not known, cannot use ICMP NAT traversal method\n"));
- return;
- }
- GNUNET_assert (sa->sin_family == AF_INET);
- if (NULL == inet_ntop (AF_INET,
- &sa->sin_addr,
- inet4, INET_ADDRSTRLEN))
- {
- GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "inet_ntop");
- return;
- }
- GNUNET_snprintf(port_as_string,
- sizeof (port_as_string),
- "%d",
- plugin->adv_port);
-#if DEBUG_TCP_NAT
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- _("Running gnunet-nat-client %s %s %u\n"),
- plugin->internal_address,
- inet4,
- (unsigned int) plugin->adv_port);
-#endif
- proc = GNUNET_OS_start_process (NULL,
- NULL,
- "gnunet-nat-client",
- "gnunet-nat-client",
- plugin->internal_address,
- inet4,
- port_as_string,
- NULL);
- if (NULL == proc)
- return;
- /* we know that the gnunet-nat-client will terminate virtually
- instantly */
- GNUNET_OS_process_wait (proc);
- GNUNET_OS_process_close (proc);
-}
-
/**
* Function that can be used by the transport service to transmit
* and does NOT mean that the message was not transmitted (DV and NAT)
*/
static ssize_t
-tcp_plugin_send (void *cls,
- const struct GNUNET_PeerIdentity *target,
- const char *msg,
- size_t msgbuf_size,
- uint32_t priority,
- struct GNUNET_TIME_Relative timeout,
- struct Session *session,
- const void *addr,
- size_t addrlen,
- int force_address,
+tcp_plugin_send (void *cls, const struct GNUNET_PeerIdentity *target,
+ const char *msg, size_t msgbuf_size, uint32_t priority,
+ struct GNUNET_TIME_Relative timeout, struct Session *session,
+ const void *addr, size_t addrlen, int force_address,
GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
{
struct Plugin *plugin = cls;
unsigned int is_natd;
GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# bytes TCP was asked to transmit"),
- msgbuf_size,
- GNUNET_NO);
+ gettext_noop ("# bytes TCP was asked to transmit"),
+ msgbuf_size, GNUNET_NO);
/* FIXME: we could do this cheaper with a hash table
- where we could restrict the iteration to entries that match
- the target peer... */
+ * where we could restrict the iteration to entries that match
+ * the target peer... */
is_natd = GNUNET_NO;
if (session == NULL)
+ {
+ cand_session = NULL;
+ next = plugin->sessions;
+ while (NULL != (session = next))
{
- cand_session = NULL;
- next = plugin->sessions;
- while (NULL != (session = next))
- {
- next = session->next;
- GNUNET_assert (session->client != NULL);
- if (0 != memcmp (target,
- &session->target,
- sizeof (struct GNUNET_PeerIdentity)))
- continue;
- if ( ( (GNUNET_SYSERR == force_address) &&
- (session->expecting_welcome == GNUNET_NO) ) ||
- (GNUNET_NO == force_address) )
- {
- cand_session = select_better_session (cand_session,
- session);
- continue;
- }
- if (GNUNET_SYSERR == force_address)
- continue;
- GNUNET_break (GNUNET_YES == force_address);
- if (addr == NULL)
- {
- GNUNET_break (0);
- break;
- }
- if ( (addrlen != session->connect_alen) &&
- (session->is_nat == GNUNET_NO) )
- continue;
- if ((0 != memcmp (session->connect_addr,
- addr,
- addrlen)) && (session->is_nat == GNUNET_NO))
- continue;
- cand_session = select_better_session (cand_session,
- session);
- }
- session = cand_session;
- }
- if ( (session == NULL) &&
- (addr == NULL) )
- {
+ next = session->next;
+ GNUNET_assert (session->client != NULL);
+ if (0 !=
+ memcmp (target, &session->target,
+ sizeof (struct GNUNET_PeerIdentity)))
+ continue;
+ if (((GNUNET_SYSERR == force_address) &&
+ (session->expecting_welcome == GNUNET_NO)) ||
+ (GNUNET_NO == force_address))
+ {
+ cand_session = select_better_session (cand_session, session);
+ continue;
+ }
+ if (GNUNET_SYSERR == force_address)
+ continue;
+ GNUNET_break (GNUNET_YES == force_address);
+ if (addr == NULL)
+ {
+ GNUNET_break (0);
+ break;
+ }
+ if ((addrlen != session->connect_alen) && (session->is_nat == GNUNET_NO))
+ continue;
+ if ((0 != memcmp (session->connect_addr, addr, addrlen)) &&
+ (session->is_nat == GNUNET_NO))
+ continue;
+ cand_session = select_better_session (cand_session, session);
+ }
+ session = cand_session;
+ }
+ if ((session == NULL) && (addr == NULL))
+ {
#if DEBUG_TCP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Asked to transmit to `%4s' without address and I have no existing connection (failing).\n",
- GNUNET_i2s (target));
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Asked to transmit to `%4s' without address and I have no existing connection (failing).\n",
+ GNUNET_i2s (target));
#endif
- GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# bytes discarded by TCP (no address and no connection)"),
- msgbuf_size,
- GNUNET_NO);
- return -1;
- }
+ GNUNET_STATISTICS_update (plugin->env->stats,
+ gettext_noop
+ ("# bytes discarded by TCP (no address and no connection)"),
+ msgbuf_size, GNUNET_NO);
+ return -1;
+ }
if (session == NULL)
+ {
+ if (addrlen == sizeof (struct IPv6TcpAddress))
{
- if (addrlen == sizeof (struct IPv6TcpAddress))
- {
- t6 = addr;
- af = AF_INET6;
- memset (&a6, 0, sizeof (a6));
+ t6 = addr;
+ af = AF_INET6;
+ memset (&a6, 0, sizeof (a6));
#if HAVE_SOCKADDR_IN_SIN_LEN
- a6.sin6_len = sizeof (a6);
+ a6.sin6_len = sizeof (a6);
#endif
- a6.sin6_family = AF_INET6;
- a6.sin6_port = t6->t6_port;
- if (t6->t6_port == 0)
- is_natd = GNUNET_YES;
- memcpy (&a6.sin6_addr,
- &t6->ipv6_addr,
- sizeof (struct in6_addr));
- sb = &a6;
- sbs = sizeof (a6);
- }
- else if (addrlen == sizeof (struct IPv4TcpAddress))
- {
- t4 = addr;
- af = AF_INET;
- memset (&a4, 0, sizeof (a4));
+ a6.sin6_family = AF_INET6;
+ a6.sin6_port = t6->t6_port;
+ if (t6->t6_port == 0)
+ is_natd = GNUNET_YES;
+ memcpy (&a6.sin6_addr, &t6->ipv6_addr, sizeof (struct in6_addr));
+ sb = &a6;
+ sbs = sizeof (a6);
+ }
+ else if (addrlen == sizeof (struct IPv4TcpAddress))
+ {
+ t4 = addr;
+ af = AF_INET;
+ memset (&a4, 0, sizeof (a4));
#if HAVE_SOCKADDR_IN_SIN_LEN
- a4.sin_len = sizeof (a4);
+ a4.sin_len = sizeof (a4);
#endif
- a4.sin_family = AF_INET;
- a4.sin_port = t4->t_port;
- if (t4->t_port == 0)
- is_natd = GNUNET_YES;
- a4.sin_addr.s_addr = t4->ipv4_addr;
- sb = &a4;
- sbs = sizeof (a4);
- }
- else
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
- "tcp",
- _("Address of unexpected length: %u\n"),
- addrlen);
- GNUNET_break (0);
- return -1;
- }
-
- if ((is_natd == GNUNET_YES) && (addrlen == sizeof (struct IPv6TcpAddress)))
- return -1; /* NAT client only works with IPv4 addresses */
-
-
- if ( (plugin->enable_nat_client == GNUNET_YES) &&
- (is_natd == GNUNET_YES) &&
- (GNUNET_NO == GNUNET_CONTAINER_multihashmap_contains(plugin->nat_wait_conns,
- &target->hashPubKey)) )
- {
+ a4.sin_family = AF_INET;
+ a4.sin_port = t4->t4_port;
+ if (t4->t4_port == 0)
+ is_natd = GNUNET_YES;
+ a4.sin_addr.s_addr = t4->ipv4_addr;
+ sb = &a4;
+ sbs = sizeof (a4);
+ }
+ else
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, "tcp",
+ _("Address of unexpected length: %u\n"), addrlen);
+ GNUNET_break (0);
+ return -1;
+ }
+
+ if ((is_natd == GNUNET_YES) && (addrlen == sizeof (struct IPv6TcpAddress)))
+ return -1; /* NAT client only works with IPv4 addresses */
+ if (0 == plugin->max_connections)
+ return -1; /* saturated */
+
+ if ((is_natd == GNUNET_YES) && (NULL != plugin->nat) &&
+ (GNUNET_NO ==
+ GNUNET_CONTAINER_multihashmap_contains (plugin->nat_wait_conns,
+ &target->hashPubKey)))
+ {
#if DEBUG_TCP_NAT
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- _("Found valid IPv4 NAT address (creating session)!\n"));
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ _("Found valid IPv4 NAT address (creating session)!\n"));
#endif
- session = create_session (plugin,
- target,
- NULL,
- GNUNET_YES);
-
- /* create new message entry */
- pm = GNUNET_malloc (sizeof (struct PendingMessage) + msgbuf_size);
- /* FIXME: the memset of this malloc can be up to 2% of our total runtime */
- pm->msg = (const char*) &pm[1];
- memcpy (&pm[1], msg, msgbuf_size);
- /* FIXME: this memcpy can be up to 7% of our total run-time
- (for transport service) */
- pm->message_size = msgbuf_size;
- pm->timeout = GNUNET_TIME_relative_to_absolute (timeout);
- pm->transmit_cont = cont;
- pm->transmit_cont_cls = cont_cls;
-
- /* append pm to pending_messages list */
- GNUNET_CONTAINER_DLL_insert_after (session->pending_messages_head,
- session->pending_messages_tail,
- session->pending_messages_tail,
- pm);
-
- GNUNET_assert(GNUNET_CONTAINER_multihashmap_put(plugin->nat_wait_conns,
- &target->hashPubKey,
- session,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY) == GNUNET_OK);
+ session = create_session (plugin, target, NULL, GNUNET_YES);
+ GNUNET_assert (session != NULL);
+
+ /* create new message entry */
+ pm = GNUNET_malloc (sizeof (struct PendingMessage) + msgbuf_size);
+ /* FIXME: the memset of this malloc can be up to 2% of our total runtime */
+ pm->msg = (const char *) &pm[1];
+ memcpy (&pm[1], msg, msgbuf_size);
+ /* FIXME: this memcpy can be up to 7% of our total run-time
+ * (for transport service) */
+ pm->message_size = msgbuf_size;
+ pm->timeout = GNUNET_TIME_relative_to_absolute (timeout);
+ pm->transmit_cont = cont;
+ pm->transmit_cont_cls = cont_cls;
+
+ /* append pm to pending_messages list */
+ GNUNET_CONTAINER_DLL_insert_after (session->pending_messages_head,
+ session->pending_messages_tail,
+ session->pending_messages_tail, pm);
+
+ GNUNET_assert (GNUNET_CONTAINER_multihashmap_put
+ (plugin->nat_wait_conns, &target->hashPubKey, session,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY) ==
+ GNUNET_OK);
#if DEBUG_TCP_NAT
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Created NAT WAIT connection to `%4s' at `%s'\n",
- GNUNET_i2s (target),
- GNUNET_a2s (sb, sbs));
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Created NAT WAIT connection to `%4s' at `%s'\n",
+ GNUNET_i2s (target), GNUNET_a2s (sb, sbs));
#endif
- run_gnunet_nat_client (plugin, &a4);
- return 0;
- }
- if ( (plugin->enable_nat_client == GNUNET_YES) &&
- (is_natd == GNUNET_YES) &&
- (GNUNET_YES == GNUNET_CONTAINER_multihashmap_contains(plugin->nat_wait_conns,
- &target->hashPubKey)) )
- {
- /* Only do one NAT punch attempt per peer identity */
- return -1;
- }
- sa = GNUNET_CONNECTION_create_from_sockaddr (af, sb, sbs);
- if (sa == NULL)
- {
+ GNUNET_NAT_run_client (plugin->nat, &a4);
+ return 0;
+ }
+ if ((is_natd == GNUNET_YES) &&
+ (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_contains (plugin->nat_wait_conns,
+ &target->hashPubKey)))
+ {
+ /* Only do one NAT punch attempt per peer identity */
+ return -1;
+ }
+ sa = GNUNET_CONNECTION_create_from_sockaddr (af, sb, sbs);
+ if (sa == NULL)
+ {
#if DEBUG_TCP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Failed to create connection to `%4s' at `%s'\n",
- GNUNET_i2s (target),
- GNUNET_a2s (sb, sbs));
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Failed to create connection to `%4s' at `%s'\n",
+ GNUNET_i2s (target), GNUNET_a2s (sb, sbs));
#endif
- GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# bytes discarded by TCP (failed to connect)"),
- msgbuf_size,
- GNUNET_NO);
- return -1;
- }
+ GNUNET_STATISTICS_update (plugin->env->stats,
+ gettext_noop
+ ("# bytes discarded by TCP (failed to connect)"),
+ msgbuf_size, GNUNET_NO);
+ return -1;
+ }
+ GNUNET_assert (0 != plugin->max_connections);
+ plugin->max_connections--;
#if DEBUG_TCP_NAT
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Asked to transmit to `%4s', creating fresh session using address `%s'.\n",
- GNUNET_i2s (target),
- GNUNET_a2s (sb, sbs));
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Asked to transmit to `%4s', creating fresh session using address `%s'.\n",
+ GNUNET_i2s (target), GNUNET_a2s (sb, sbs));
#endif
- session = create_session (plugin,
- target,
- GNUNET_SERVER_connect_socket (plugin->server,
- sa),
- GNUNET_NO);
- session->connect_addr = GNUNET_malloc (addrlen);
- memcpy (session->connect_addr,
- addr,
- addrlen);
- session->connect_alen = addrlen;
+ session =
+ create_session (plugin, target,
+ GNUNET_SERVER_connect_socket (plugin->server, sa),
+ GNUNET_NO);
+ session->connect_addr = GNUNET_malloc (addrlen);
+ memcpy (session->connect_addr, addr, addrlen);
+ session->connect_alen = addrlen;
+ }
+ else /* session != NULL */
+ {
+ /* check if session is valid */
+ struct Session *ses = plugin->sessions;
+
+ while ((ses != NULL) && (ses != session))
+ ses = ses->next;
+ if (ses == NULL)
+ {
+ GNUNET_break (0);
+ return -1;
}
+ }
GNUNET_assert (session != NULL);
GNUNET_assert (session->client != NULL);
+
+
+ GNUNET_SERVER_client_set_timeout (session->client,
+ GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# bytes currently in TCP buffers"),
- msgbuf_size,
- GNUNET_NO);
+ gettext_noop ("# bytes currently in TCP buffers"),
+ msgbuf_size, GNUNET_NO);
/* create new message entry */
pm = GNUNET_malloc (sizeof (struct PendingMessage) + msgbuf_size);
- pm->msg = (const char*) &pm[1];
+ pm->msg = (const char *) &pm[1];
memcpy (&pm[1], msg, msgbuf_size);
pm->message_size = msgbuf_size;
pm->timeout = GNUNET_TIME_relative_to_absolute (timeout);
/* append pm to pending_messages list */
GNUNET_CONTAINER_DLL_insert_after (session->pending_messages_head,
- session->pending_messages_tail,
- session->pending_messages_tail,
- pm);
+ session->pending_messages_tail,
+ session->pending_messages_tail, pm);
#if DEBUG_TCP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Asked to transmit %u bytes to `%s', added message to list.\n",
- msgbuf_size,
- GNUNET_i2s (target));
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Asked to transmit %u bytes to `%s', added message to list.\n",
+ msgbuf_size, GNUNET_i2s (target));
#endif
process_pending_messages (session);
return msgbuf_size;
* to be cancelled
*/
static void
-tcp_plugin_disconnect (void *cls,
- const struct GNUNET_PeerIdentity *target)
+tcp_plugin_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
{
struct Plugin *plugin = cls;
struct Session *session;
struct PendingMessage *pm;
#if DEBUG_TCP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Asked to cancel session with `%4s'\n",
- GNUNET_i2s (target));
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Asked to cancel session with `%4s'\n", GNUNET_i2s (target));
#endif
next = plugin->sessions;
while (NULL != (session = next))
- {
- next = session->next;
- if (0 != memcmp (target,
- &session->target,
- sizeof (struct GNUNET_PeerIdentity)))
- continue;
- pm = session->pending_messages_head;
- while (pm != NULL)
- {
- pm->transmit_cont = NULL;
- pm->transmit_cont_cls = NULL;
- pm = pm->next;
- }
- GNUNET_STATISTICS_update (session->plugin->env->stats,
- gettext_noop ("# transport-service disconnect requests for TCP"),
- 1,
- GNUNET_NO);
- disconnect_session (session);
- }
+ {
+ next = session->next;
+ if (0 !=
+ memcmp (target, &session->target, sizeof (struct GNUNET_PeerIdentity)))
+ continue;
+ pm = session->pending_messages_head;
+ while (pm != NULL)
+ {
+ pm->transmit_cont = NULL;
+ pm->transmit_cont_cls = NULL;
+ pm = pm->next;
+ }
+ GNUNET_STATISTICS_update (session->plugin->env->stats,
+ gettext_noop
+ ("# transport-service disconnect requests for TCP"),
+ 1, GNUNET_NO);
+ disconnect_session (session);
+ }
}
char *ret;
if (hostname == NULL)
- {
- ppc->asc (ppc->asc_cls, NULL);
- GNUNET_free (ppc);
- return;
- }
+ {
+ ppc->asc (ppc->asc_cls, NULL);
+ GNUNET_free (ppc);
+ return;
+ }
GNUNET_asprintf (&ret, "%s:%d", hostname, ppc->port);
ppc->asc (ppc->asc_cls, ret);
GNUNET_free (ret);
* @param asc_cls closure for asc
*/
static void
-tcp_plugin_address_pretty_printer (void *cls,
- const char *type,
- const void *addr,
- size_t addrlen,
+tcp_plugin_address_pretty_printer (void *cls, const char *type,
+ const void *addr, size_t addrlen,
int numeric,
struct GNUNET_TIME_Relative timeout,
GNUNET_TRANSPORT_AddressStringCallback asc,
void *asc_cls)
{
- struct Plugin *plugin = cls;
struct PrettyPrinterContext *ppc;
const void *sb;
size_t sbs;
uint16_t port;
if (addrlen == sizeof (struct IPv6TcpAddress))
- {
- t6 = addr;
- memset (&a6, 0, sizeof (a6));
- a6.sin6_family = AF_INET6;
- a6.sin6_port = t6->t6_port;
- memcpy (&a6.sin6_addr,
- &t6->ipv6_addr,
- sizeof (struct in6_addr));
- port = ntohs (t6->t6_port);
- sb = &a6;
- sbs = sizeof (a6);
- }
+ {
+ t6 = addr;
+ memset (&a6, 0, sizeof (a6));
+ a6.sin6_family = AF_INET6;
+ a6.sin6_port = t6->t6_port;
+ memcpy (&a6.sin6_addr, &t6->ipv6_addr, sizeof (struct in6_addr));
+ port = ntohs (t6->t6_port);
+ sb = &a6;
+ sbs = sizeof (a6);
+ }
else if (addrlen == sizeof (struct IPv4TcpAddress))
- {
- t4 = addr;
- memset (&a4, 0, sizeof (a4));
- a4.sin_family = AF_INET;
- a4.sin_port = t4->t_port;
- a4.sin_addr.s_addr = t4->ipv4_addr;
- port = ntohs (t4->t_port);
- sb = &a4;
- sbs = sizeof (a4);
- }
+ {
+ t4 = addr;
+ memset (&a4, 0, sizeof (a4));
+ a4.sin_family = AF_INET;
+ a4.sin_port = t4->t4_port;
+ a4.sin_addr.s_addr = t4->ipv4_addr;
+ port = ntohs (t4->t4_port);
+ sb = &a4;
+ sbs = sizeof (a4);
+ }
else
- {
- /* invalid address */
- GNUNET_break_op (0);
- asc (asc_cls, NULL);
- return;
- }
+ {
+ /* invalid address */
+ GNUNET_break_op (0);
+ asc (asc_cls, NULL);
+ return;
+ }
ppc = GNUNET_malloc (sizeof (struct PrettyPrinterContext));
ppc->asc = asc;
ppc->asc_cls = asc_cls;
ppc->port = port;
- GNUNET_RESOLVER_hostname_get (plugin->env->cfg,
- sb,
- sbs,
- !numeric, timeout, &append_port, ppc);
+ GNUNET_RESOLVER_hostname_get (sb, sbs, !numeric, timeout, &append_port, ppc);
}
* @return GNUNET_OK if port is either open_port or adv_port
*/
static int
-check_port (struct Plugin *plugin,
- uint16_t in_port)
+check_port (struct Plugin *plugin, uint16_t in_port)
{
if ((in_port == plugin->adv_port) || (in_port == plugin->open_port))
return GNUNET_OK;
* and transport, GNUNET_SYSERR if not
*/
static int
-tcp_plugin_check_address (void *cls,
- const void *addr,
- size_t addrlen)
+tcp_plugin_check_address (void *cls, const void *addr, size_t addrlen)
{
struct Plugin *plugin = cls;
struct IPv4TcpAddress *v4;
if ((addrlen != sizeof (struct IPv4TcpAddress)) &&
(addrlen != sizeof (struct IPv6TcpAddress)))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
+ {
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
+ }
if (addrlen == sizeof (struct IPv4TcpAddress))
- {
- v4 = (struct IPv4TcpAddress *) addr;
- if (GNUNET_OK ==
- check_mapped_addr (plugin, v4, sizeof (struct IPv4TcpAddress)))
- return GNUNET_OK;
- if (GNUNET_OK !=
- check_port (plugin, ntohs (v4->t_port)))
- return GNUNET_SYSERR;
- if (GNUNET_OK !=
- check_local_addr (plugin, &v4->ipv4_addr, sizeof (struct in_addr)))
- return GNUNET_SYSERR;
- }
+ {
+ v4 = (struct IPv4TcpAddress *) addr;
+ if (GNUNET_OK != check_port (plugin, ntohs (v4->t4_port)))
+ return GNUNET_SYSERR;
+ if (GNUNET_OK !=
+ GNUNET_NAT_test_address (plugin->nat, &v4->ipv4_addr,
+ sizeof (struct in_addr)))
+ return GNUNET_SYSERR;
+ }
else
+ {
+ v6 = (struct IPv6TcpAddress *) addr;
+ if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
{
- v6 = (struct IPv6TcpAddress *) addr;
- if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if (GNUNET_OK ==
- check_mapped_addr (plugin, v6, sizeof (struct IPv6TcpAddress)))
- return GNUNET_OK;
- if (GNUNET_OK !=
- check_port (plugin, ntohs (v6->t6_port)))
- return GNUNET_SYSERR;
- if (GNUNET_OK !=
- check_local_addr (plugin, &v6->ipv6_addr, sizeof (struct in6_addr)))
- return GNUNET_SYSERR;
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
}
+ if (GNUNET_OK != check_port (plugin, ntohs (v6->t6_port)))
+ return GNUNET_SYSERR;
+ if (GNUNET_OK !=
+ GNUNET_NAT_test_address (plugin->nat, &v6->ipv6_addr,
+ sizeof (struct in6_addr)))
+ return GNUNET_SYSERR;
+ }
return GNUNET_OK;
}
* @param message the actual message
*/
static void
-handle_tcp_nat_probe (void *cls,
- struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
+handle_tcp_nat_probe (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
{
struct Plugin *plugin = cls;
struct Session *session;
const struct sockaddr_in6 *s6;
#if DEBUG_TCP_NAT
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "received tcp NAT probe\n");
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp", "received NAT probe\n");
#endif
/* We have received a TCP NAT probe, meaning we (hopefully) initiated
* a connection to this peer by running gnunet-nat-client. This peer
* as the default for that peer. Do so and then send a WELCOME message
* so we can really be connected!
*/
- if (ntohs(message->size) != sizeof(struct TCP_NAT_ProbeMessage))
- {
- GNUNET_break_op(0);
- return;
- }
- tcp_nat_probe = (const struct TCP_NAT_ProbeMessage *)message;
- session = GNUNET_CONTAINER_multihashmap_get(plugin->nat_wait_conns,
- &tcp_nat_probe->clientIdentity.hashPubKey);
+ if (ntohs (message->size) != sizeof (struct TCP_NAT_ProbeMessage))
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+
+ tcp_nat_probe = (const struct TCP_NAT_ProbeMessage *) message;
+ if (0 ==
+ memcmp (&tcp_nat_probe->clientIdentity, plugin->env->my_identity,
+ sizeof (struct GNUNET_PeerIdentity)))
+ {
+ /* refuse connections from ourselves */
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+
+ session =
+ GNUNET_CONTAINER_multihashmap_get (plugin->nat_wait_conns,
+ &tcp_nat_probe->
+ clientIdentity.hashPubKey);
if (session == NULL)
- {
+ {
#if DEBUG_TCP_NAT
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Did NOT find session for NAT probe!\n");
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Did NOT find session for NAT probe!\n");
#endif
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
- return;
- }
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
#if DEBUG_TCP_NAT
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Found session for NAT probe!\n");
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Found session for NAT probe!\n");
#endif
- GNUNET_assert(GNUNET_CONTAINER_multihashmap_remove(plugin->nat_wait_conns,
- &tcp_nat_probe->clientIdentity.hashPubKey,
- session) == GNUNET_YES);
- if (GNUNET_OK !=
- GNUNET_SERVER_client_get_address (client, &vaddr, &alen))
- {
- GNUNET_break (0);
- GNUNET_free (session);
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
- return;
- }
+ GNUNET_assert (GNUNET_CONTAINER_multihashmap_remove
+ (plugin->nat_wait_conns,
+ &tcp_nat_probe->clientIdentity.hashPubKey,
+ session) == GNUNET_YES);
+ if (GNUNET_OK != GNUNET_SERVER_client_get_address (client, &vaddr, &alen))
+ {
+ GNUNET_break (0);
+ GNUNET_free (session);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
GNUNET_SERVER_client_keep (client);
session->client = client;
session->inbound = GNUNET_NO;
#if DEBUG_TCP_NAT
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Found address `%s' for incoming connection\n",
- GNUNET_a2s (vaddr, alen));
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Found address `%s' for incoming connection\n",
+ GNUNET_a2s (vaddr, alen));
#endif
- switch (((const struct sockaddr *)vaddr)->sa_family)
- {
- case AF_INET:
- s4 = vaddr;
- t4 = GNUNET_malloc (sizeof (struct IPv4TcpAddress));
- t4->t_port = s4->sin_port;
- t4->ipv4_addr = s4->sin_addr.s_addr;
- session->connect_addr = t4;
- session->connect_alen = sizeof (struct IPv4TcpAddress);
- break;
- case AF_INET6:
- s6 = vaddr;
- t6 = GNUNET_malloc (sizeof (struct IPv6TcpAddress));
- t6->t6_port = s6->sin6_port;
- memcpy (&t6->ipv6_addr,
- &s6->sin6_addr,
- sizeof (struct in6_addr));
- session->connect_addr = t6;
- session->connect_alen = sizeof (struct IPv6TcpAddress);
- break;
- default:
- GNUNET_break_op (0);
+ switch (((const struct sockaddr *) vaddr)->sa_family)
+ {
+ case AF_INET:
+ s4 = vaddr;
+ t4 = GNUNET_malloc (sizeof (struct IPv4TcpAddress));
+ t4->t4_port = s4->sin_port;
+ t4->ipv4_addr = s4->sin_addr.s_addr;
+ session->connect_addr = t4;
+ session->connect_alen = sizeof (struct IPv4TcpAddress);
+ break;
+ case AF_INET6:
+ s6 = vaddr;
+ t6 = GNUNET_malloc (sizeof (struct IPv6TcpAddress));
+ t6->t6_port = s6->sin6_port;
+ memcpy (&t6->ipv6_addr, &s6->sin6_addr, sizeof (struct in6_addr));
+ session->connect_addr = t6;
+ session->connect_alen = sizeof (struct IPv6TcpAddress);
+ break;
+ default:
+ GNUNET_break_op (0);
#if DEBUG_TCP_NAT
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Bad address for incoming connection!\n");
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Bad address for incoming connection!\n");
#endif
- GNUNET_free (vaddr);
- GNUNET_SERVER_client_drop (client);
- GNUNET_free (session);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
+ GNUNET_free (vaddr);
+ GNUNET_SERVER_client_drop (client);
+ GNUNET_free (session);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
GNUNET_free (vaddr);
-
+
session->next = plugin->sessions;
plugin->sessions = session;
GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# TCP sessions active"),
- 1,
- GNUNET_NO);
+ gettext_noop ("# TCP sessions active"), 1,
+ GNUNET_NO);
process_pending_messages (session);
GNUNET_SERVER_receive_done (client, GNUNET_OK);
}
* @param message the actual message
*/
static void
-handle_tcp_welcome (void *cls,
- struct GNUNET_SERVER_Client *client,
+handle_tcp_welcome (void *cls, struct GNUNET_SERVER_Client *client,
const struct GNUNET_MessageHeader *message)
{
struct Plugin *plugin = cls;
const struct sockaddr_in *s4;
const struct sockaddr_in6 *s6;
+ if (0 ==
+ memcmp (&wm->clientIdentity, plugin->env->my_identity,
+ sizeof (struct GNUNET_PeerIdentity)))
+ {
+ /* refuse connections from ourselves */
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
#if DEBUG_TCP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Received %s message from `%4s'.\n",
- "WELCOME",
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Received %s message from `%4s'.\n", "WELCOME",
GNUNET_i2s (&wm->clientIdentity));
#endif
GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# TCP WELCOME messages received"),
- 1,
- GNUNET_NO);
+ gettext_noop ("# TCP WELCOME messages received"), 1,
+ GNUNET_NO);
session = find_session_by_client (plugin, client);
if (session == NULL)
- {
+ {
#if DEBUG_TCP_NAT
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Received %s message from a `%4s', creating new session\n",
- "WELCOME",
- GNUNET_i2s (&wm->clientIdentity));
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Received %s message from a `%4s', creating new session\n",
+ "WELCOME", GNUNET_i2s (&wm->clientIdentity));
#endif
- GNUNET_SERVER_client_keep (client);
- session = create_session (plugin,
- &wm->clientIdentity,
- client,
- GNUNET_NO);
- session->inbound = GNUNET_YES;
- if (GNUNET_OK ==
- GNUNET_SERVER_client_get_address (client, &vaddr, &alen))
- {
+ GNUNET_SERVER_client_keep (client);
+ session = create_session (plugin, &wm->clientIdentity, client, GNUNET_NO);
+ session->inbound = GNUNET_YES;
+ if (GNUNET_OK == GNUNET_SERVER_client_get_address (client, &vaddr, &alen))
+ {
#if DEBUG_TCP_NAT
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Found address `%s' for incoming connection\n",
- GNUNET_a2s (vaddr, alen));
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Found address `%s' for incoming connection\n",
+ GNUNET_a2s (vaddr, alen));
#endif
- if (alen == sizeof (struct sockaddr_in))
- {
- s4 = vaddr;
- t4 = GNUNET_malloc (sizeof (struct IPv4TcpAddress));
- t4->t_port = s4->sin_port;
- t4->ipv4_addr = s4->sin_addr.s_addr;
- session->connect_addr = t4;
- session->connect_alen = sizeof (struct IPv4TcpAddress);
- }
- else if (alen == sizeof (struct sockaddr_in6))
- {
- s6 = vaddr;
- t6 = GNUNET_malloc (sizeof (struct IPv6TcpAddress));
- t6->t6_port = s6->sin6_port;
- memcpy (&t6->ipv6_addr,
- &s6->sin6_addr,
- sizeof (struct in6_addr));
- session->connect_addr = t6;
- session->connect_alen = sizeof (struct IPv6TcpAddress);
- }
-
- GNUNET_free (vaddr);
- }
- else
- {
+ if (alen == sizeof (struct sockaddr_in))
+ {
+ s4 = vaddr;
+ t4 = GNUNET_malloc (sizeof (struct IPv4TcpAddress));
+ t4->t4_port = s4->sin_port;
+ t4->ipv4_addr = s4->sin_addr.s_addr;
+ session->connect_addr = t4;
+ session->connect_alen = sizeof (struct IPv4TcpAddress);
+ }
+ else if (alen == sizeof (struct sockaddr_in6))
+ {
+ s6 = vaddr;
+ t6 = GNUNET_malloc (sizeof (struct IPv6TcpAddress));
+ t6->t6_port = s6->sin6_port;
+ memcpy (&t6->ipv6_addr, &s6->sin6_addr, sizeof (struct in6_addr));
+ session->connect_addr = t6;
+ session->connect_alen = sizeof (struct IPv6TcpAddress);
+ }
+
+ GNUNET_free (vaddr);
+ }
+ else
+ {
#if DEBUG_TCP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Did not obtain TCP socket address for incoming connection\n");
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Did not obtain TCP socket address for incoming connection\n");
#endif
- }
- process_pending_messages (session);
}
+ process_pending_messages (session);
+ }
else
- {
+ {
#if DEBUG_TCP_NAT
- if (GNUNET_OK ==
- GNUNET_SERVER_client_get_address (client, &vaddr, &alen))
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Found address `%s' (already have session)\n",
- GNUNET_a2s (vaddr, alen));
- GNUNET_free (vaddr);
- }
-#endif
+ if (GNUNET_OK == GNUNET_SERVER_client_get_address (client, &vaddr, &alen))
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Found address `%s' (already have session)\n",
+ GNUNET_a2s (vaddr, alen));
+ GNUNET_free (vaddr);
}
+#endif
+ }
if (session->expecting_welcome != GNUNET_YES)
- {
- GNUNET_break_op (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
+ {
+ GNUNET_break_op (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
session->last_activity = GNUNET_TIME_absolute_get ();
session->expecting_welcome = GNUNET_NO;
+ GNUNET_SERVER_client_set_timeout (client,
+ GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
GNUNET_SERVER_receive_done (client, GNUNET_OK);
}
* @param tc task context (unused)
*/
static void
-delayed_done (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+delayed_done (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct Session *session = cls;
struct GNUNET_TIME_Relative delay;
session->receive_delay_task = GNUNET_SCHEDULER_NO_TASK;
- delay = session->plugin->env->receive (session->plugin->env->cls,
- &session->target,
- NULL,
- NULL, 0,
- session,
- NULL, 0);
+ delay =
+ session->plugin->env->receive (session->plugin->env->cls,
+ &session->target, NULL, NULL, 0, session,
+ NULL, 0);
if (delay.rel_value == 0)
GNUNET_SERVER_receive_done (session->client, GNUNET_OK);
else
session->receive_delay_task =
- GNUNET_SCHEDULER_add_delayed (delay, &delayed_done, session);
+ GNUNET_SCHEDULER_add_delayed (delay, &delayed_done, session);
}
* @param message the actual message
*/
static void
-handle_tcp_data (void *cls,
- struct GNUNET_SERVER_Client *client,
+handle_tcp_data (void *cls, struct GNUNET_SERVER_Client *client,
const struct GNUNET_MessageHeader *message)
{
struct Plugin *plugin = cls;
uint16_t type;
type = ntohs (message->type);
- if ( (GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_WELCOME == type) ||
- (GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_NAT_PROBE == type) )
- {
- /* We don't want to propagate WELCOME and NAT Probe messages up! */
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
- return;
- }
+ if ((GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_WELCOME == type) ||
+ (GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_NAT_PROBE == type))
+ {
+ /* We don't want to propagate WELCOME and NAT Probe messages up! */
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ return;
+ }
session = find_session_by_client (plugin, client);
- if ( (NULL == session) || (GNUNET_YES == session->expecting_welcome) )
- {
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
+ if ((NULL == session) || (GNUNET_YES == session->expecting_welcome))
+ {
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
session->last_activity = GNUNET_TIME_absolute_get ();
#if DEBUG_TCP > 1
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Passing %u bytes of type %u from `%4s' to transport service.\n",
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Passing %u bytes of type %u from `%4s' to transport service.\n",
(unsigned int) ntohs (message->size),
- (unsigned int) ntohs (message->type),
- GNUNET_i2s (&session->target));
+ (unsigned int) ntohs (message->type),
+ GNUNET_i2s (&session->target));
#endif
GNUNET_STATISTICS_update (plugin->env->stats,
- gettext_noop ("# bytes received via TCP"),
- ntohs (message->size),
- GNUNET_NO);
+ gettext_noop ("# bytes received via TCP"),
+ ntohs (message->size), GNUNET_NO);
struct GNUNET_TRANSPORT_ATS_Information distance[2];
+
distance[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
distance[0].value = htonl (1);
distance[1].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
distance[1].value = htonl (0);
- delay = plugin->env->receive (plugin->env->cls, &session->target, message,
- (const struct GNUNET_TRANSPORT_ATS_Information *) &distance,
- 2,
- session,
- (GNUNET_YES == session->inbound) ? NULL : session->connect_addr,
- (GNUNET_YES == session->inbound) ? 0 : session->connect_alen);
+ delay =
+ plugin->env->receive (plugin->env->cls, &session->target, message,
+ (const struct GNUNET_TRANSPORT_ATS_Information *)
+ &distance, 2, session,
+ (GNUNET_YES ==
+ session->inbound) ? NULL : session->connect_addr,
+ (GNUNET_YES ==
+ session->inbound) ? 0 : session->connect_alen);
if (delay.rel_value == 0)
- {
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
- }
+ {
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ }
else
- {
-#if DEBUG_TCP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Throttling receiving from `%s' for %llu ms\n",
- GNUNET_i2s (&session->target),
- (unsigned long long) delay.rel_value);
+ {
+#if DEBUG_TCP
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
+ "Throttling receiving from `%s' for %llu ms\n",
+ GNUNET_i2s (&session->target),
+ (unsigned long long) delay.rel_value);
#endif
- GNUNET_SERVER_disable_receive_done_warning (client);
- session->receive_delay_task =
- GNUNET_SCHEDULER_add_delayed (delay, &delayed_done, session);
- }
+ GNUNET_SERVER_disable_receive_done_warning (client);
+ session->receive_delay_task =
+ GNUNET_SCHEDULER_add_delayed (delay, &delayed_done, session);
+ }
}
* @param client identification of the client
*/
static void
-disconnect_notify (void *cls,
- struct GNUNET_SERVER_Client *client)
+disconnect_notify (void *cls, struct GNUNET_SERVER_Client *client)
{
struct Plugin *plugin = cls;
struct Session *session;
if (client == NULL)
return;
+ plugin->max_connections++;
session = find_session_by_client (plugin, client);
if (session == NULL)
return; /* unknown, nothing to do */
#if DEBUG_TCP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "tcp",
"Destroying session of `%4s' with %s due to network-level disconnect.\n",
GNUNET_i2s (&session->target),
- (session->connect_addr != NULL) ?
- tcp_address_to_string (session->plugin,
- session->connect_addr,
- session->connect_alen) : "*");
+ (session->connect_addr !=
+ NULL) ? tcp_address_to_string (session->plugin,
+ session->connect_addr,
+ session->connect_alen) :
+ "*");
#endif
GNUNET_STATISTICS_update (session->plugin->env->stats,
- gettext_noop ("# network-level TCP disconnect events"),
- 1,
- GNUNET_NO);
+ gettext_noop
+ ("# network-level TCP disconnect events"), 1,
+ GNUNET_NO);
disconnect_session (session);
}
-static int check_localaddress (const struct sockaddr *addr, socklen_t addrlen)
-{
- uint32_t res = 0;
- int local = GNUNET_NO;
- int af = addr->sa_family;
- switch (af)
- {
- case AF_INET:
- {
- uint32_t netmask = 0x7F000000;
- uint32_t address = ntohl (((struct sockaddr_in *) addr)->sin_addr.s_addr);
- res = (address >> 24) ^ (netmask >> 24);
- if (res != 0)
- local = GNUNET_NO;
- else
- local = GNUNET_YES;
-#if DEBUG_TCP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Checking IPv4 address `%s': %s\n", GNUNET_a2s (addr, addrlen), (local==GNUNET_YES) ? "local" : "global");
-#endif
- break;
- }
- case AF_INET6:
- {
- if (IN6_IS_ADDR_LOOPBACK (&((struct sockaddr_in6 *) addr)->sin6_addr) ||
- IN6_IS_ADDR_LINKLOCAL (&((struct sockaddr_in6 *) addr)->sin6_addr))
- local = GNUNET_YES;
- else
- local = GNUNET_NO;
-#if DEBUG_TCP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Checking IPv6 address `%s' : %s\n", GNUNET_a2s (addr, addrlen), (local==GNUNET_YES) ? "local" : "global");
-#endif
- break;
- }
- }
- return local;
-}
-
-/**
- * Add the IP of our network interface to the list of
- * our internal IP addresses.
- *
- * @param cls the 'struct Plugin*'
- * @param name name of the interface
- * @param isDefault do we think this may be our default interface
- * @param addr address of the interface
- * @param addrlen number of bytes in addr
- * @return GNUNET_OK to continue iterating
- */
-static int
-process_interfaces (void *cls,
- const char *name,
- int isDefault,
- const struct sockaddr *addr, socklen_t addrlen)
-{
- struct Plugin *plugin = cls;
- int af;
- struct IPv4TcpAddress t4;
- struct IPv6TcpAddress t6;
- struct IPv4TcpAddress t4_nat;
- struct IPv6TcpAddress t6_nat;
- void *arg;
- uint16_t args;
- void *arg_nat;
- char buf[INET6_ADDRSTRLEN];
-
- af = addr->sa_family;
- arg_nat = NULL;
-
- if (plugin->use_localaddresses == GNUNET_NO)
- {
- if (GNUNET_YES == check_localaddress (addr, addrlen))
- {
-#if DEBUG_TCP
- GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
- "tcp",
- "Not notifying transport of address `%s' (local address)\n",
- GNUNET_a2s (addr, addrlen));
-#endif
- return GNUNET_OK;
- }
- }
-
- switch (af)
- {
- case AF_INET:
- t4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
- GNUNET_assert (NULL != inet_ntop(AF_INET,
- &t4.ipv4_addr,
- buf,
- sizeof (buf)));
- if ( (plugin->bind_address != NULL) &&
- (0 != strcmp(buf, plugin->bind_address)) )
- {
-#if DEBUG_TCP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Not notifying transport of address `%s' (does not match bind address)\n",
- GNUNET_a2s (addr, addrlen));
-#endif
- return GNUNET_OK;
- }
- if ( (plugin->internal_address == NULL) &&
- (isDefault) )
- plugin->internal_address = GNUNET_strdup (buf);
- add_to_address_list (plugin, &t4.ipv4_addr, sizeof (struct in_addr));
- if (plugin->behind_nat == GNUNET_YES)
- {
- /* Also advertise as NAT (with port 0) */
- t4_nat.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
- t4_nat.t_port = htons(0);
- arg_nat = &t4_nat;
- }
- t4.t_port = htons (plugin->adv_port);
- arg = &t4;
- args = sizeof (t4);
- break;
- case AF_INET6:
- if ( (IN6_IS_ADDR_LINKLOCAL (&((struct sockaddr_in6 *) addr)->sin6_addr)) ||
- (GNUNET_YES == GNUNET_CONFIGURATION_get_value_yesno(plugin->env->cfg,
- "nat",
- "DISABLEV6")) )
- {
- /* skip link local addresses */
- return GNUNET_OK;
- }
- memcpy (&t6.ipv6_addr,
- &((struct sockaddr_in6 *) addr)->sin6_addr,
- sizeof (struct in6_addr));
-
- /* check bind address */
- GNUNET_assert (NULL != inet_ntop(AF_INET6,
- &t6.ipv6_addr,
- buf,
- sizeof (buf)));
-
- if ( (plugin->bind_address != NULL) &&
- (0 != strcmp(buf, plugin->bind_address)) )
- {
-#if DEBUG_TCP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Not notifying transport of address `%s' (does not match bind address)\n",
- GNUNET_a2s (addr, addrlen));
-#endif
- return GNUNET_OK;
- }
-
- add_to_address_list (plugin,
- &t6.ipv6_addr,
- sizeof (struct in6_addr));
- if (plugin->behind_nat == GNUNET_YES)
- {
- /* Also advertise as NAT (with port 0) */
- memcpy (&t6_nat.ipv6_addr,
- &((struct sockaddr_in6 *) addr)->sin6_addr,
- sizeof (struct in6_addr));
- t6_nat.t6_port = htons(0);
- arg_nat = &t6;
- }
- t6.t6_port = htons (plugin->adv_port);
- arg = &t6;
- args = sizeof (t6);
- break;
- default:
- GNUNET_break (0);
- return GNUNET_OK;
- }
- if (plugin->adv_port != 0)
- {
-#if DEBUG_TCP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Found address `%s' (%s) len %d\n",
- GNUNET_a2s (addr, addrlen), name, args);
-#endif
- plugin->env->notify_address (plugin->env->cls,
- "tcp",
- arg, args, GNUNET_TIME_UNIT_FOREVER_REL);
- }
-
- if (arg_nat != NULL)
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- _("Found address `%s' (%s) len %d\n"),
- GNUNET_a2s (addr, addrlen), name, args);
- plugin->env->notify_address (plugin->env->cls,
- "tcp",
- arg_nat, args, GNUNET_TIME_UNIT_FOREVER_REL);
- }
-
- return GNUNET_OK;
-}
-
-
-/**
- * Function called by the resolver for each address obtained from DNS
- * for our own hostname. Add the addresses to the list of our
- * external IP addresses.
- *
- * @param cls closure
- * @param addr one of the addresses of the host, NULL for the last address
- * @param addrlen length of the address
- */
-static void
-process_hostname_ips (void *cls,
- const struct sockaddr *addr, socklen_t addrlen)
-{
- struct Plugin *plugin = cls;
-
- if (addr == NULL)
- {
- plugin->hostname_dns = NULL;
- return;
- }
- /* FIXME: Can we figure out our external address here so it doesn't need to be user specified? */
- process_interfaces (plugin, "<hostname>", GNUNET_YES, addr, addrlen);
-}
-
-
/**
* We can now send a probe message, copy into buffer to really send.
*
* @return number of bytes copied into buf
*/
static size_t
-notify_send_probe (void *cls,
- size_t size,
- void *buf)
+notify_send_probe (void *cls, size_t size, void *buf)
{
struct TCPProbeContext *tcp_probe_ctx = cls;
struct Plugin *plugin = tcp_probe_ctx->plugin;
size_t ret;
tcp_probe_ctx->transmit_handle = NULL;
- GNUNET_CONTAINER_DLL_remove (plugin->probe_head,
- plugin->probe_tail,
- tcp_probe_ctx);
+ GNUNET_CONTAINER_DLL_remove (plugin->probe_head, plugin->probe_tail,
+ tcp_probe_ctx);
if (buf == NULL)
- {
- GNUNET_CONNECTION_destroy (tcp_probe_ctx->sock, GNUNET_NO);
- GNUNET_free(tcp_probe_ctx);
- return 0;
- }
- GNUNET_assert(size >= sizeof(tcp_probe_ctx->message));
- memcpy(buf, &tcp_probe_ctx->message, sizeof(tcp_probe_ctx->message));
+ {
+ GNUNET_CONNECTION_destroy (tcp_probe_ctx->sock, GNUNET_NO);
+ GNUNET_free (tcp_probe_ctx);
+ return 0;
+ }
+ GNUNET_assert (size >= sizeof (tcp_probe_ctx->message));
+ memcpy (buf, &tcp_probe_ctx->message, sizeof (tcp_probe_ctx->message));
GNUNET_SERVER_connect_socket (tcp_probe_ctx->plugin->server,
tcp_probe_ctx->sock);
- ret = sizeof(tcp_probe_ctx->message);
- GNUNET_free(tcp_probe_ctx);
+ ret = sizeof (tcp_probe_ctx->message);
+ GNUNET_free (tcp_probe_ctx);
return ret;
}
/**
- * We have been notified that gnunet-nat-server has written something to stdout.
- * Handle the output, then reschedule this function to be called again once
- * more is available.
+ * Function called by the NAT subsystem suggesting another peer wants
+ * to connect to us via connection reversal. Try to connect back to the
+ * given IP.
*
- * @param cls the plugin handle
- * @param tc the scheduling context
+ * @param cls closure
+ * @param addr address to try
+ * @param addrlen number of bytes in addr
*/
static void
-tcp_plugin_server_read (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+try_connection_reversal (void *cls, const struct sockaddr *addr,
+ socklen_t addrlen)
{
struct Plugin *plugin = cls;
- char mybuf[40];
- ssize_t bytes;
- size_t i;
- int port;
- const char *port_start;
- struct sockaddr_in sin_addr;
- struct TCPProbeContext *tcp_probe_ctx;
struct GNUNET_CONNECTION_Handle *sock;
-
- if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
- return;
- memset (mybuf, 0, sizeof(mybuf));
- bytes = GNUNET_DISK_file_read(plugin->server_stdout_handle,
- mybuf,
- sizeof(mybuf));
- if (bytes < 1)
- {
-#if DEBUG_TCP_NAT
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Finished reading from server stdout with code: %d\n",
- bytes);
-#endif
- /* FIXME: consider process_wait here? */
- return;
- }
-
- port_start = NULL;
- for (i = 0; i < sizeof(mybuf); i++)
- {
- if (mybuf[i] == '\n')
- {
- mybuf[i] = '\0';
- break;
- }
- if ( (mybuf[i] == ':') && (i + 1 < sizeof(mybuf)) )
- {
- mybuf[i] = '\0';
- port_start = &mybuf[i + 1];
- }
- }
-
- /* construct socket address of sender */
- memset (&sin_addr, 0, sizeof (sin_addr));
- sin_addr.sin_family = AF_INET;
-#if HAVE_SOCKADDR_IN_SIN_LEN
- sin_addr.sin_len = sizeof (sin_addr);
-#endif
- if ( (NULL == port_start) ||
- (1 != sscanf (port_start, "%d", &port)) ||
- (-1 == inet_pton(AF_INET, mybuf, &sin_addr.sin_addr)) )
- {
- /* should we restart gnunet-nat-server? */
- GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING,
- "tcp",
- _("gnunet-nat-server generated malformed address `%s'\n"),
- mybuf);
- plugin->server_read_task
- = GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
- plugin->server_stdout_handle,
- &tcp_plugin_server_read,
- plugin);
- return;
- }
- sin_addr.sin_port = htons((uint16_t) port);
-#if DEBUG_TCP_NAT
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "gnunet-nat-server read: %s:%d\n",
- mybuf, port);
-#endif
+ struct TCPProbeContext *tcp_probe_ctx;
/**
* We have received an ICMP response, ostensibly from a peer
* that wants to connect to us! Send a message to establish a connection.
*/
- sock = GNUNET_CONNECTION_create_from_sockaddr (AF_INET,
- (const struct sockaddr *)&sin_addr,
- sizeof (sin_addr));
+ sock = GNUNET_CONNECTION_create_from_sockaddr (AF_INET, addr, addrlen);
if (sock == NULL)
- {
- /* failed for some odd reason (out of sockets?); ignore attempt */
- plugin->server_read_task =
- GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
- plugin->server_stdout_handle,
- &tcp_plugin_server_read,
- plugin);
- return;
- }
+ {
+ /* failed for some odd reason (out of sockets?); ignore attempt */
+ return;
+ }
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "Sending TCP probe message to `%s:%u'!\n",
- mybuf,
- (unsigned int) port);
/* FIXME: do we need to track these probe context objects so that
- we can clean them up on plugin unload? */
- tcp_probe_ctx
- = GNUNET_malloc(sizeof(struct TCPProbeContext));
- tcp_probe_ctx->message.header.size
- = htons(sizeof(struct TCP_NAT_ProbeMessage));
- tcp_probe_ctx->message.header.type
- = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_NAT_PROBE);
- memcpy (&tcp_probe_ctx->message.clientIdentity,
- plugin->env->my_identity,
- sizeof(struct GNUNET_PeerIdentity));
+ * we can clean them up on plugin unload? */
+ tcp_probe_ctx = GNUNET_malloc (sizeof (struct TCPProbeContext));
+ tcp_probe_ctx->message.header.size =
+ htons (sizeof (struct TCP_NAT_ProbeMessage));
+ tcp_probe_ctx->message.header.type =
+ htons (GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_NAT_PROBE);
+ memcpy (&tcp_probe_ctx->message.clientIdentity, plugin->env->my_identity,
+ sizeof (struct GNUNET_PeerIdentity));
tcp_probe_ctx->plugin = plugin;
tcp_probe_ctx->sock = sock;
- GNUNET_CONTAINER_DLL_insert (plugin->probe_head,
- plugin->probe_tail,
- tcp_probe_ctx);
- tcp_probe_ctx->transmit_handle
- = GNUNET_CONNECTION_notify_transmit_ready (sock,
- ntohs (tcp_probe_ctx->message.header.size),
- GNUNET_TIME_UNIT_FOREVER_REL,
- ¬ify_send_probe, tcp_probe_ctx);
-
- plugin->server_read_task =
- GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
- plugin->server_stdout_handle,
- &tcp_plugin_server_read,
- plugin);
-}
-
-
-/**
- * Start the gnunet-nat-server process for users behind NAT.
- *
- * @param plugin the transport plugin
- * @return GNUNET_YES if process was started, GNUNET_SYSERR on error
- */
-static int
-tcp_transport_start_nat_server (struct Plugin *plugin)
-{
- if (plugin->internal_address == NULL)
- return GNUNET_SYSERR;
- plugin->server_stdout = GNUNET_DISK_pipe (GNUNET_YES,
- GNUNET_NO,
- GNUNET_YES);
- if (plugin->server_stdout == NULL)
- return GNUNET_SYSERR;
-#if DEBUG_TCP_NAT
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp"
- "Starting %s %s\n", "gnunet-nat-server", plugin->internal_address);
-#endif
- /* Start the server process */
- plugin->server_proc = GNUNET_OS_start_process (NULL,
- plugin->server_stdout,
- "gnunet-nat-server",
- "gnunet-nat-server",
- plugin->internal_address,
- NULL);
- if (plugin->server_proc == NULL)
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING,
- "tcp",
- _("Failed to start %s\n"),
- "gnunet-nat-server");
- GNUNET_DISK_pipe_close (plugin->server_stdout);
- plugin->server_stdout = NULL;
- return GNUNET_SYSERR;
- }
- /* Close the write end of the read pipe */
- GNUNET_DISK_pipe_close_end(plugin->server_stdout,
- GNUNET_DISK_PIPE_END_WRITE);
- plugin->server_stdout_handle
- = GNUNET_DISK_pipe_handle (plugin->server_stdout,
- GNUNET_DISK_PIPE_END_READ);
- plugin->server_read_task
- = GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
- plugin->server_stdout_handle,
- &tcp_plugin_server_read,
- plugin);
- return GNUNET_YES;
-}
-
-
-/**
- * Return the actual path to a file found in the current
- * PATH environment variable.
- *
- * @param binary the name of the file to find
- * @return path to binary, NULL if not found
- */
-static char *
-get_path_from_PATH (const char *binary)
-{
- char *path;
- char *pos;
- char *end;
- char *buf;
- const char *p;
-
- p = getenv ("PATH");
- if (p == NULL)
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
- "tcp",
- _("PATH environment variable is unset.\n"));
- return NULL;
- }
- path = GNUNET_strdup (p); /* because we write on it */
- buf = GNUNET_malloc (strlen (path) + 20);
- pos = path;
-
- while (NULL != (end = strchr (pos, PATH_SEPARATOR)))
- {
- *end = '\0';
- sprintf (buf, "%s/%s", pos, binary);
- if (GNUNET_DISK_file_test (buf) == GNUNET_YES)
- {
- GNUNET_free (path);
- return buf;
- }
- pos = end + 1;
- }
- sprintf (buf, "%s/%s", pos, binary);
- if (GNUNET_DISK_file_test (buf) == GNUNET_YES)
- {
- GNUNET_free (path);
- return buf;
- }
- GNUNET_free (buf);
- GNUNET_free (path);
- return NULL;
-}
-
-
-/**
- * Check whether the suid bit is set on a file.
- * Attempts to find the file using the current
- * PATH environment variable as a search path.
- *
- * @param binary the name of the file to check
- * @return GNUNET_YES if the file is SUID,
- * GNUNET_NO if not,
- * GNUNET_SYSERR on error
- */
-static int
-check_gnunet_nat_binary (const char *binary)
-{
- struct stat statbuf;
- char *p;
-#ifdef MINGW
- SOCKET rawsock;
- char *binaryexe;
-
- GNUNET_asprintf (&binaryexe, "%s.exe", binary);
- p = get_path_from_PATH (binaryexe);
- free (binaryexe);
-#else
- p = get_path_from_PATH (binary);
-#endif
- if (p == NULL)
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
- "tcp",
- _("Could not find binary `%s' in PATH!\n"),
- binary);
- return GNUNET_NO;
- }
- if (0 != STAT (p, &statbuf))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("stat (%s) failed: %s\n"),
- p,
- STRERROR (errno));
- GNUNET_free (p);
- return GNUNET_SYSERR;
- }
- GNUNET_free (p);
-#ifndef MINGW
- if ( (0 != (statbuf.st_mode & S_ISUID)) &&
- (statbuf.st_uid == 0) )
- return GNUNET_YES;
- return GNUNET_NO;
-#else
- rawsock = socket (AF_INET, SOCK_RAW, IPPROTO_ICMP);
- if (INVALID_SOCKET == rawsock)
- {
- DWORD err = GetLastError ();
- GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING,
- "tcp",
- "socket (AF_INET, SOCK_RAW, IPPROTO_ICMP) failed! GLE = %d\n", err);
- return GNUNET_NO; /* not running as administrator */
- }
- closesocket (rawsock);
- return GNUNET_YES;
-#endif
-}
-
-
-/**
- * Our (external) hostname was resolved.
- *
- * @param cls the 'struct Plugin'
- * @param addr NULL on error, otherwise result of DNS lookup
- * @param addrlen number of bytes in addr
- */
-static void
-process_external_ip (void *cls,
- const struct sockaddr *addr,
- socklen_t addrlen)
-{
- struct Plugin *plugin = cls;
- const struct sockaddr_in *s;
- struct IPv4TcpAddress t4;
- char buf[INET_ADDRSTRLEN];
-
- plugin->ext_dns = NULL;
- if (addr == NULL)
- return;
- GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
- s = (const struct sockaddr_in *) addr;
- t4.ipv4_addr = s->sin_addr.s_addr;
- if ( (plugin->behind_nat == GNUNET_YES) &&
- (plugin->enable_nat_server == GNUNET_YES) )
- {
- t4.t_port = htons(0);
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Notifying transport of address %s:%d\n",
- plugin->external_address,
- 0);
- }
- else
- {
- t4.t_port = htons(plugin->adv_port);
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Notifying transport of address %s:%d\n",
- plugin->external_address,
- (int) plugin->adv_port);
- }
-
- if ((plugin->bind_address != NULL) && (plugin->behind_nat == GNUNET_NO))
- {
- GNUNET_assert (NULL != inet_ntop(AF_INET,
- &t4.ipv4_addr,
- buf,
- sizeof (buf)));
- if (0 != strcmp (plugin->bind_address, buf))
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
- "tcp",
- "NAT is not enabled and specific bind address `%s' differs from external address `%s'! Not notifying about external address `%s'\n",
- plugin->bind_address,
- plugin->external_address,
- plugin->external_address);
- return;
- }
- }
-
- add_to_address_list (plugin,
- &t4.ipv4_addr,
- sizeof (struct in_addr));
+ GNUNET_CONTAINER_DLL_insert (plugin->probe_head, plugin->probe_tail,
+ tcp_probe_ctx);
+ tcp_probe_ctx->transmit_handle =
+ GNUNET_CONNECTION_notify_transmit_ready (sock,
+ ntohs (tcp_probe_ctx->
+ message.header.size),
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ ¬ify_send_probe,
+ tcp_probe_ctx);
- plugin->env->notify_address (plugin->env->cls,
- "tcp",
- &t4, sizeof(t4),
- GNUNET_TIME_UNIT_FOREVER_REL);
}
static const struct GNUNET_SERVER_MessageHandler my_handlers[] = {
{&handle_tcp_welcome, NULL, GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_WELCOME,
sizeof (struct WelcomeMessage)},
- {&handle_tcp_nat_probe, NULL, GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_NAT_PROBE, sizeof (struct TCP_NAT_ProbeMessage)},
+ {&handle_tcp_nat_probe, NULL, GNUNET_MESSAGE_TYPE_TRANSPORT_TCP_NAT_PROBE,
+ sizeof (struct TCP_NAT_ProbeMessage)},
{&handle_tcp_data, NULL, GNUNET_MESSAGE_TYPE_ALL, 0},
{NULL, NULL, 0, 0}
};
struct GNUNET_SERVICE_Context *service;
unsigned long long aport;
unsigned long long bport;
+ unsigned long long max_connections;
unsigned int i;
- int behind_nat;
- int nat_punched;
- int enable_nat_client;
- int enable_nat_server;
- int enable_upnp;
- int use_localaddresses;
- char *internal_address;
- char *external_address;
- char *bind_address;
- struct sockaddr_in in_addr;
struct GNUNET_TIME_Relative idle_timeout;
+ int ret;
+ struct sockaddr **addrs;
+ socklen_t *addrlens;
- behind_nat = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
- "nat",
- "BEHIND_NAT");
- nat_punched = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
- "nat",
- "NAT_PUNCHED");
- enable_nat_client = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
- "nat",
- "ENABLE_NAT_CLIENT");
- enable_nat_server = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
- "nat",
- "ENABLE_NAT_SERVER");
- enable_upnp = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
- "nat",
- "ENABLE_UPNP");
-
- if ( (GNUNET_YES == enable_nat_server) &&
- (GNUNET_YES != check_gnunet_nat_binary("gnunet-nat-server")) )
- {
- enable_nat_server = GNUNET_NO;
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Configuration requires `%s', but binary is not installed properly (SUID bit not set). Option disabled.\n"),
- "gnunet-nat-server");
- }
-
- if ( (GNUNET_YES == enable_nat_client) &&
- (GNUNET_YES != check_gnunet_nat_binary("gnunet-nat-client")) )
- {
- enable_nat_client = GNUNET_NO;
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Configuration requires `%s', but binary is not installed properly (SUID bit not set). Option disabled.\n"),
- "gnunet-nat-client");
- }
-
- external_address = NULL;
- if (GNUNET_OK ==
- GNUNET_CONFIGURATION_have_value (env->cfg,
- "nat",
- "EXTERNAL_ADDRESS"))
- {
- (void) GNUNET_CONFIGURATION_get_value_string (env->cfg,
- "nat",
- "EXTERNAL_ADDRESS",
- &external_address);
- }
-
- if ( (external_address != NULL) &&
- (inet_pton(AF_INET, external_address, &in_addr.sin_addr) != 1) )
- {
-
- GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING,
- "tcp",
- _("Malformed %s `%s' given in configuration!\n"),
- "EXTERNAL_ADDRESS",
- external_address);
- return NULL;
- }
- if ( (external_address == NULL) &&
- (nat_punched == GNUNET_YES) )
- {
- nat_punched = GNUNET_NO;
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Configuration says NAT was punched, but `%s' is not given. Option ignored.\n"),
- "EXTERNAL_ADDRESS");
- }
-
- if (GNUNET_YES == nat_punched)
- {
- enable_nat_server = GNUNET_NO;
- enable_upnp = GNUNET_NO;
- }
-
- bind_address = NULL;
- if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_string (env->cfg,
- "nat",
- "BINDTO",
- &bind_address))
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_INFO,
- "tcp",
- _("Binding TCP plugin to specific address: `%s'\n"),
- bind_address);
- }
-
- internal_address = NULL;
- if (GNUNET_OK ==
- GNUNET_CONFIGURATION_have_value (env->cfg,
- "nat",
- "INTERNAL_ADDRESS"))
- {
- (void) GNUNET_CONFIGURATION_get_value_string (env->cfg,
- "nat",
- "INTERNAL_ADDRESS",
- &internal_address);
- }
-
- if ( (internal_address != NULL) &&
- (inet_pton(AF_INET, internal_address, &in_addr.sin_addr) != 1) )
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING,
- "tcp",
- _("Malformed %s `%s' given in configuration!\n"),
- "INTERNAL_ADDRESS",
- internal_address);
- GNUNET_free_non_null(internal_address);
- GNUNET_free_non_null(external_address);
- return NULL;
- }
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-tcp",
+ "MAX_CONNECTIONS",
+ &max_connections))
+ max_connections = 128;
- if ((bind_address != NULL) && (internal_address != NULL))
- {
- if (0 != strcmp(internal_address, bind_address ))
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
- "tcp",
- "Specific bind address `%s' and internal address `%s' must not differ, forcing internal address to bind address!\n",
- bind_address, internal_address);
- GNUNET_free (internal_address);
- internal_address = bind_address;
- GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
- "tcp","New internal address `%s'\n", internal_address);
- }
- }
-
aport = 0;
- if ( (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_number (env->cfg,
- "transport-tcp",
- "PORT",
- &bport)) ||
- (bport > 65535) ||
- ((GNUNET_OK ==
- GNUNET_CONFIGURATION_get_value_number (env->cfg,
- "transport-tcp",
- "ADVERTISED-PORT",
- &aport)) &&
- (aport > 65535)) )
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
- "tcp",
- _("Require valid port number for service `%s' in configuration!\n"),
- "transport-tcp");
- GNUNET_free_non_null(external_address);
- GNUNET_free_non_null(internal_address);
- return NULL;
- }
-
- use_localaddresses = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
- "transport-tcp",
- "USE_LOCALADDR");
- if (use_localaddresses == GNUNET_SYSERR)
- use_localaddresses = GNUNET_NO;
-
+ if ((GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-tcp", "PORT",
+ &bport)) || (bport > 65535) ||
+ ((GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-tcp",
+ "ADVERTISED-PORT", &aport)) &&
+ (aport > 65535)))
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, "tcp",
+ _
+ ("Require valid port number for service `%s' in configuration!\n"),
+ "transport-tcp");
+ return NULL;
+ }
if (aport == 0)
aport = bport;
if (bport == 0)
aport = 0;
-
if (bport != 0)
+ {
+ service = GNUNET_SERVICE_start ("transport-tcp", env->cfg);
+ if (service == NULL)
{
- service = GNUNET_SERVICE_start ("transport-tcp", env->cfg);
- if (service == NULL)
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING,
- "tcp",
- _("Failed to start service.\n"));
- return NULL;
- }
+ GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, "tcp",
+ _("Failed to start service.\n"));
+ return NULL;
}
+ }
else
service = NULL;
+
+
plugin = GNUNET_malloc (sizeof (struct Plugin));
+ plugin->max_connections = max_connections;
plugin->open_port = bport;
plugin->adv_port = aport;
- plugin->bind_address = bind_address;
- plugin->external_address = external_address;
- plugin->internal_address = internal_address;
- plugin->behind_nat = behind_nat;
- plugin->nat_punched = nat_punched;
- plugin->enable_nat_client = enable_nat_client;
- plugin->enable_nat_server = enable_nat_server;
- plugin->enable_upnp = enable_upnp;
- plugin->use_localaddresses = use_localaddresses;
plugin->env = env;
plugin->lsock = NULL;
+ if ((service != NULL) &&
+ (GNUNET_SYSERR !=
+ (ret =
+ GNUNET_SERVICE_get_server_addresses ("transport-tcp", env->cfg, &addrs,
+ &addrlens))))
+ {
+ plugin->nat =
+ GNUNET_NAT_register (env->cfg, GNUNET_YES, aport, (unsigned int) ret,
+ (const struct sockaddr **) addrs, addrlens,
+ &tcp_nat_port_map_callback,
+ &try_connection_reversal, plugin);
+ while (ret > 0)
+ {
+ ret--;
+ GNUNET_assert (addrs[ret] != NULL);
+ GNUNET_free (addrs[ret]);
+ }
+ GNUNET_free_non_null (addrs);
+ GNUNET_free_non_null (addrlens);
+ }
+ else
+ {
+ plugin->nat =
+ GNUNET_NAT_register (env->cfg, GNUNET_YES, 0, 0, NULL, NULL, NULL,
+ &try_connection_reversal, plugin);
+ }
api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
api->cls = plugin;
api->send = &tcp_plugin_send;
api->check_address = &tcp_plugin_check_address;
api->address_to_string = &tcp_address_to_string;
plugin->service = service;
- if (service != NULL)
- {
- plugin->server = GNUNET_SERVICE_get_server (service);
- }
+ if (service != NULL)
+ {
+ plugin->server = GNUNET_SERVICE_get_server (service);
+ }
else
- {
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_time (env->cfg,
- "transport-tcp",
- "TIMEOUT",
- &idle_timeout))
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
- "tcp",
- _("Failed to find option %s in section %s!\n"),
- "TIMEOUT",
- "transport-tcp");
- GNUNET_free_non_null(external_address);
- GNUNET_free_non_null(internal_address);
- GNUNET_free (api);
- return NULL;
- }
- plugin->server = GNUNET_SERVER_create_with_sockets (NULL, NULL, NULL,
- idle_timeout, GNUNET_YES);
+ {
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_time (env->cfg, "transport-tcp",
+ "TIMEOUT", &idle_timeout))
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, "tcp",
+ _("Failed to find option %s in section %s!\n"),
+ "TIMEOUT", "transport-tcp");
+ if (plugin->nat != NULL)
+ GNUNET_NAT_unregister (plugin->nat);
+ GNUNET_free (plugin);
+ GNUNET_free (api);
+ return NULL;
}
+ plugin->server =
+ GNUNET_SERVER_create_with_sockets (&plugin_tcp_access_check, plugin,
+ NULL, idle_timeout, GNUNET_YES);
+ }
plugin->handlers = GNUNET_malloc (sizeof (my_handlers));
memcpy (plugin->handlers, my_handlers, sizeof (my_handlers));
for (i = 0;
i++)
plugin->handlers[i].callback_cls = plugin;
GNUNET_SERVER_add_handlers (plugin->server, plugin->handlers);
- GNUNET_SERVER_disconnect_notify (plugin->server,
- &disconnect_notify,
- plugin);
- GNUNET_OS_network_interfaces_list (&process_interfaces, plugin);
-
- if ( (plugin->behind_nat == GNUNET_YES) &&
- (plugin->enable_nat_server == GNUNET_YES) &&
- (GNUNET_YES != tcp_transport_start_nat_server(plugin)) )
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
- "tcp",
- _("Failed to start %s required for NAT in %s!\n"),
- "gnunet-nat-server"
- "transport-tcp");
- GNUNET_free_non_null(external_address);
- GNUNET_free_non_null(internal_address);
- if (service != NULL)
- GNUNET_SERVICE_stop (service);
- else
- GNUNET_SERVER_destroy (plugin->server);
- GNUNET_free (api);
- return NULL;
- }
-
- if (enable_nat_client == GNUNET_YES)
- {
- plugin->nat_wait_conns = GNUNET_CONTAINER_multihashmap_create(16);
- GNUNET_assert (plugin->nat_wait_conns != NULL);
- }
-
+ GNUNET_SERVER_disconnect_notify (plugin->server, &disconnect_notify, plugin);
+ plugin->nat_wait_conns = GNUNET_CONTAINER_multihashmap_create (16);
if (bport != 0)
- GNUNET_log_from (GNUNET_ERROR_TYPE_INFO,
- "tcp",
- _("TCP transport listening on port %llu\n"),
- bport);
+ GNUNET_log_from (GNUNET_ERROR_TYPE_INFO, "tcp",
+ _("TCP transport listening on port %llu\n"), bport);
else
- GNUNET_log_from (GNUNET_ERROR_TYPE_INFO,
- "tcp",
- _("TCP transport not listening on any port (client only)\n"));
+ GNUNET_log_from (GNUNET_ERROR_TYPE_INFO, "tcp",
+ _
+ ("TCP transport not listening on any port (client only)\n"));
if (aport != bport)
- GNUNET_log_from (GNUNET_ERROR_TYPE_INFO,
- "tcp",
- _("TCP transport advertises itself as being on port %llu\n"),
+ GNUNET_log_from (GNUNET_ERROR_TYPE_INFO, "tcp",
+ _
+ ("TCP transport advertises itself as being on port %llu\n"),
aport);
-
- plugin->hostname_dns = GNUNET_RESOLVER_hostname_resolve (env->cfg,
- AF_UNSPEC,
- HOSTNAME_RESOLVE_TIMEOUT,
- &process_hostname_ips,
- plugin);
-
- if (plugin->external_address != NULL)
- {
- plugin->ext_dns = GNUNET_RESOLVER_ip_get (env->cfg,
- plugin->external_address,
- AF_INET,
- GNUNET_TIME_UNIT_MINUTES,
- &process_external_ip,
- plugin);
- }
return api;
}
struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
struct Plugin *plugin = api->cls;
struct Session *session;
- struct LocalAddrList *lal;
struct TCPProbeContext *tcp_probe;
- if (plugin->ext_dns != NULL)
- {
- GNUNET_RESOLVER_request_cancel (plugin->ext_dns);
- plugin->ext_dns = NULL;
- }
while (NULL != (session = plugin->sessions))
disconnect_session (session);
- if (NULL != plugin->hostname_dns)
- {
- GNUNET_RESOLVER_request_cancel (plugin->hostname_dns);
- plugin->hostname_dns = NULL;
- }
if (plugin->service != NULL)
GNUNET_SERVICE_stop (plugin->service);
else
GNUNET_SERVER_destroy (plugin->server);
GNUNET_free (plugin->handlers);
- while (NULL != (lal = plugin->lal_head))
- {
- GNUNET_CONTAINER_DLL_remove (plugin->lal_head,
- plugin->lal_tail,
- lal);
- if (lal->nat != NULL)
- GNUNET_NAT_unregister (lal->nat);
- GNUNET_free_non_null (lal->external_nat_address);
- GNUNET_free (lal);
- }
+ if (plugin->nat != NULL)
+ GNUNET_NAT_unregister (plugin->nat);
while (NULL != (tcp_probe = plugin->probe_head))
- {
- GNUNET_CONTAINER_DLL_remove (plugin->probe_head,
- plugin->probe_tail,
- tcp_probe);
- GNUNET_CONNECTION_destroy (tcp_probe->sock, GNUNET_NO);
- GNUNET_free (tcp_probe);
- }
-
- if ((plugin->behind_nat == GNUNET_YES) &&
- (plugin->enable_nat_server == GNUNET_YES))
- {
- if (0 != GNUNET_OS_process_kill (plugin->server_proc, SIGTERM))
- GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "kill");
- GNUNET_OS_process_wait (plugin->server_proc);
- GNUNET_OS_process_close (plugin->server_proc);
- plugin->server_proc = NULL;
- }
- GNUNET_free_non_null(plugin->bind_address);
+ {
+ GNUNET_CONTAINER_DLL_remove (plugin->probe_head, plugin->probe_tail,
+ tcp_probe);
+ GNUNET_CONNECTION_destroy (tcp_probe->sock, GNUNET_NO);
+ GNUNET_free (tcp_probe);
+ }
+ GNUNET_CONTAINER_multihashmap_destroy (plugin->nat_wait_conns);
GNUNET_free (plugin);
GNUNET_free (api);
return NULL;
projects / oweals / gnunet.git / blobdiff