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authorChristian Grothoff <christian@grothoff.org>2014-06-22 22:25:02 +0000
committerChristian Grothoff <christian@grothoff.org>2014-06-22 22:25:02 +0000
commit705ce0c1e6b6e8fd877f94c6bad977718db4b647 (patch)
tree9ede1e28fc2f6cf4d0af9ba09fa49cc622638ebd /src/transport/plugin_transport_unix.c
parentd28cb8e55ebe88deccac1a27cfcdbdd71516cc47 (diff)
implement monitoring API in UNIX, simplify code a bit
Diffstat (limited to 'src/transport/plugin_transport_unix.c')
-rw-r--r--src/transport/plugin_transport_unix.c928
1 files changed, 479 insertions, 449 deletions
diff --git a/src/transport/plugin_transport_unix.c b/src/transport/plugin_transport_unix.c
index 881a4b9ff..6b90cf1f4 100644
--- a/src/transport/plugin_transport_unix.c
+++ b/src/transport/plugin_transport_unix.c
@@ -43,11 +43,24 @@
*/
#define RETRY 0
+/**
+ * Name of the plugin.
+ */
#define PLUGIN_NAME "unix"
+/**
+ * Options for UNIX Domain addresses.
+ */
enum UNIX_ADDRESS_OPTIONS
{
+ /**
+ * No special options.
+ */
UNIX_OPTIONS_NONE = 0,
+
+ /**
+ * Linux abstract domain sockets should be used.
+ */
UNIX_OPTIONS_USE_ABSTRACT_SOCKETS = 1
};
@@ -100,38 +113,9 @@ struct UNIXMessage
GNUNET_NETWORK_STRUCT_END
-/**
- * Handle for a session.
- */
-struct Session
-{
- /**
- * To whom are we talking to (set to our identity
- * if we are still waiting for the welcome message).
- *
- * FIXME: information duplicated with 'peer' in address!
- */
- struct GNUNET_PeerIdentity target;
-
- /**
- * Pointer to the global plugin struct.
- */
- struct Plugin *plugin;
-
- /**
- * Address of the other peer.
- */
- struct GNUNET_HELLO_Address *address;
-
- /**
- * Session timeout task
- */
- GNUNET_SCHEDULER_TaskIdentifier timeout_task;
-};
-
/**
- *
+ * Information we track for a message awaiting transmission.
*/
struct UNIXMessageWrapper
{
@@ -188,6 +172,63 @@ struct UNIXMessageWrapper
/**
+ * Handle for a session.
+ */
+struct Session
+{
+
+ /**
+ * Sessions with pending messages (!) are kept in a DLL.
+ */
+ struct Session *next;
+
+ /**
+ * Sessions with pending messages (!) are kept in a DLL.
+ */
+ struct Session *prev;
+
+ /**
+ * To whom are we talking to (set to our identity
+ * if we are still waiting for the welcome message).
+ *
+ * FIXME: information duplicated with 'peer' in address!
+ */
+ struct GNUNET_PeerIdentity target;
+
+ /**
+ * Pointer to the global plugin struct.
+ */
+ struct Plugin *plugin;
+
+ /**
+ * Address of the other peer.
+ */
+ struct GNUNET_HELLO_Address *address;
+
+ /**
+ * Number of bytes we currently have in our write queue.
+ */
+ unsigned long long bytes_in_queue;
+
+ /**
+ * Timeout for this session.
+ */
+ struct GNUNET_TIME_Absolute timeout;
+
+ /**
+ * Session timeout task.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier timeout_task;
+
+ /**
+ * Number of messages we currently have in our write queue.
+ */
+ unsigned int msgs_in_queue;
+
+};
+
+
+/**
* Encapsulation of all of the state of the plugin.
*/
struct Plugin;
@@ -224,12 +265,17 @@ struct Plugin
GNUNET_SCHEDULER_TaskIdentifier address_update_task;
/**
- * ID of select task
+ * ID of read task
*/
- GNUNET_SCHEDULER_TaskIdentifier select_task;
+ GNUNET_SCHEDULER_TaskIdentifier read_task;
/**
- * Number of bytes we currently have in our write queue.
+ * ID of write task
+ */
+ GNUNET_SCHEDULER_TaskIdentifier write_task;
+
+ /**
+ * Number of bytes we currently have in our write queues.
*/
unsigned long long bytes_in_queue;
@@ -244,14 +290,14 @@ struct Plugin
struct GNUNET_CONTAINER_MultiPeerMap *session_map;
/**
- * FD Read set
+ * Head of queue of messages to transmit.
*/
- struct GNUNET_NETWORK_FDSet *rs;
+ struct UNIXMessageWrapper *msg_head;
/**
- * FD Write set
+ * Tail of queue of messages to transmit.
*/
- struct GNUNET_NETWORK_FDSet *ws;
+ struct UNIXMessageWrapper *msg_tail;
/**
* Path of our unix domain socket (/tmp/unix-plugin-PORT)
@@ -259,16 +305,6 @@ struct Plugin
char *unix_socket_path;
/**
- * Head of queue of messages to transmit.
- */
- struct UNIXMessageWrapper *msg_head;
-
- /**
- * Tail of queue of messages to transmit.
- */
- struct UNIXMessageWrapper *msg_tail;
-
- /**
* Function to call about session status changes.
*/
GNUNET_TRANSPORT_SessionInfoCallback sic;
@@ -294,74 +330,14 @@ struct Plugin
struct GNUNET_ATS_Information ats_network;
/**
- * Is the write set in the current 'select' task? #GNUNET_NO if the
- * write queue was empty when the main task was scheduled,
- * #GNUNET_YES if we're already waiting for being allowed to write.
- */
- int with_ws;
-
- /**
* Are we using an abstract UNIX domain socket?
*/
- int abstract;
+ int is_abstract;
};
/**
- * Increment session timeout due to activity
- *
- * @param s session for which the timeout should be moved
- */
-static void
-reschedule_session_timeout (struct Session *s);
-
-
-/**
- * We have been notified that our writeset has something to read. We don't
- * know which socket needs to be read, so we have to check each one
- * Then reschedule this function to be called again once more is available.
- *
- * @param cls the plugin handle
- * @param tc the scheduling context (for rescheduling this function again)
- */
-static void
-unix_plugin_select (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc);
-
-
-/**
- * Convert unix path to a `struct sockaddr_un`
- *
- * @param unixpath path to convert
- * @param sock_len[out] set to the length of the address
- * @return converted unix path
- */
-static struct sockaddr_un *
-unix_address_to_sockaddr (const char *unixpath,
- socklen_t *sock_len)
-{
- struct sockaddr_un *un;
- size_t slen;
-
- GNUNET_assert (0 < strlen (unixpath)); /* sanity check */
- un = GNUNET_new (struct sockaddr_un);
- un->sun_family = AF_UNIX;
- slen = strlen (unixpath);
- if (slen >= sizeof (un->sun_path))
- slen = sizeof (un->sun_path) - 1;
- memcpy (un->sun_path, unixpath, slen);
- un->sun_path[slen] = '\0';
- slen = sizeof (struct sockaddr_un);
-#if HAVE_SOCKADDR_IN_SIN_LEN
- un->sun_len = (u_char) slen;
-#endif
- (*sock_len) = slen;
- return un;
-}
-
-
-/**
* Function called for a quick conversion of the binary address to
* a numeric address. Note that the caller must not free the
* address and that the next call to this function is allowed
@@ -424,39 +400,148 @@ unix_address_to_string (void *cls,
/**
- * Re-schedule the main 'select' callback (#unix_plugin_select())
- * for this plugin.
+ * Functions with this signature are called whenever we need
+ * to close a session due to a disconnect or failure to
+ * establish a connection.
*
- * @param plugin the plugin context
+ * @param cls closure with the `struct Plugin`
+ * @param session session to close down
+ * @return #GNUNET_OK on success
*/
-static void
-reschedule_select (struct Plugin *plugin)
+static int
+unix_session_disconnect (void *cls,
+ struct Session *session)
{
- if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
- {
- GNUNET_SCHEDULER_cancel (plugin->select_task);
- plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
- }
- if (NULL != plugin->msg_head)
+ struct Plugin *plugin = cls;
+ struct UNIXMessageWrapper *msgw;
+ struct UNIXMessageWrapper *next;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Disconnecting session for peer `%s' `%s'\n",
+ GNUNET_i2s (&session->target),
+ unix_address_to_string (NULL,
+ session->address->address,
+ session->address->address_length));
+ plugin->env->session_end (plugin->env->cls,
+ session->address,
+ session);
+ next = plugin->msg_head;
+ while (NULL != next)
{
- plugin->select_task =
- GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
- GNUNET_TIME_UNIT_FOREVER_REL,
- plugin->rs,
- plugin->ws,
- &unix_plugin_select, plugin);
- plugin->with_ws = GNUNET_YES;
+ msgw = next;
+ next = msgw->next;
+ if (msgw->session != session)
+ continue;
+ GNUNET_CONTAINER_DLL_remove (plugin->msg_head,
+ plugin->msg_tail,
+ msgw);
+ session->msgs_in_queue--;
+ GNUNET_assert (session->bytes_in_queue >= msgw->msgsize);
+ session->bytes_in_queue -= msgw->msgsize;
+ GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
+ plugin->bytes_in_queue -= msgw->msgsize;
+ if (NULL != msgw->cont)
+ msgw->cont (msgw->cont_cls,
+ &msgw->session->target,
+ GNUNET_SYSERR,
+ msgw->payload, 0);
+ GNUNET_free (msgw->msg);
+ GNUNET_free (msgw);
}
- else
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_remove (plugin->session_map,
+ &session->target,
+ session));
+ GNUNET_STATISTICS_set (plugin->env->stats,
+ "# UNIX sessions active",
+ GNUNET_CONTAINER_multipeermap_size (plugin->session_map),
+ GNUNET_NO);
+ if (GNUNET_SCHEDULER_NO_TASK != session->timeout_task)
{
- plugin->select_task =
- GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
- GNUNET_TIME_UNIT_FOREVER_REL,
- plugin->rs,
- NULL,
- &unix_plugin_select, plugin);
- plugin->with_ws = GNUNET_NO;
+ GNUNET_SCHEDULER_cancel (session->timeout_task);
+ session->timeout_task = GNUNET_SCHEDULER_NO_TASK;
}
+ GNUNET_HELLO_address_free (session->address);
+ GNUNET_break (0 == session->bytes_in_queue);
+ GNUNET_break (0 == session->msgs_in_queue);
+ GNUNET_free (session);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Session was idle for too long, so disconnect it
+ *
+ * @param cls the 'struct Session' to disconnect
+ * @param tc scheduler context
+ */
+static void
+session_timeout (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct Session *s = cls;
+ struct GNUNET_TIME_Relative left;
+
+ s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ left = GNUNET_TIME_absolute_get_remaining (s->timeout);
+ if (0 != left.rel_value_us)
+ {
+ /* not actually our turn yet */
+ s->timeout_task = GNUNET_SCHEDULER_add_delayed (left,
+ &session_timeout,
+ s);
+ return;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Session %p was idle for %s, disconnecting\n",
+ s,
+ GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
+ GNUNET_YES));
+ unix_session_disconnect (s->plugin, s);
+}
+
+
+/**
+ * Increment session timeout due to activity
+ *
+ * @param s session for which the timeout should be rescheduled
+ */
+static void
+reschedule_session_timeout (struct Session *s)
+{
+ GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != s->timeout_task);
+ s->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
+}
+
+
+/**
+ * Convert unix path to a `struct sockaddr_un`
+ *
+ * @param unixpath path to convert
+ * @param sock_len[out] set to the length of the address
+ * @return converted unix path
+ */
+static struct sockaddr_un *
+unix_address_to_sockaddr (const char *unixpath,
+ socklen_t *sock_len)
+{
+ struct sockaddr_un *un;
+ size_t slen;
+
+ GNUNET_assert (0 < strlen (unixpath)); /* sanity check */
+ un = GNUNET_new (struct sockaddr_un);
+ un->sun_family = AF_UNIX;
+ slen = strlen (unixpath);
+ if (slen >= sizeof (un->sun_path))
+ slen = sizeof (un->sun_path) - 1;
+ memcpy (un->sun_path, unixpath, slen);
+ un->sun_path[slen] = '\0';
+ slen = sizeof (struct sockaddr_un);
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ un->sun_len = (u_char) slen;
+#endif
+ (*sock_len) = slen;
+ return un;
}
@@ -525,70 +610,6 @@ lookup_session (struct Plugin *plugin,
/**
- * Functions with this signature are called whenever we need
- * to close a session due to a disconnect or failure to
- * establish a connection.
- *
- * @param cls closure with the `struct Plugin`
- * @param s session to close down
- * @return #GNUNET_OK on success
- */
-static int
-unix_session_disconnect (void *cls,
- struct Session *s)
-{
- struct Plugin *plugin = cls;
- struct UNIXMessageWrapper *msgw;
- struct UNIXMessageWrapper *next;
- int removed;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Disconnecting session for peer `%s' `%s'\n",
- GNUNET_i2s (&s->target),
- unix_address_to_string (NULL,
- s->address->address,
- s->address->address_length));
- plugin->env->session_end (plugin->env->cls, s->address, s);
- removed = GNUNET_NO;
- next = plugin->msg_head;
- while (NULL != next)
- {
- msgw = next;
- next = msgw->next;
- if (msgw->session != s)
- continue;
- GNUNET_CONTAINER_DLL_remove (plugin->msg_head,
- plugin->msg_tail,
- msgw);
- if (NULL != msgw->cont)
- msgw->cont (msgw->cont_cls, &msgw->session->target, GNUNET_SYSERR,
- msgw->payload, 0);
- GNUNET_free (msgw->msg);
- GNUNET_free (msgw);
- removed = GNUNET_YES;
- }
- GNUNET_assert (GNUNET_YES ==
- GNUNET_CONTAINER_multipeermap_remove (plugin->session_map,
- &s->target,
- s));
- GNUNET_STATISTICS_set (plugin->env->stats,
- "# UNIX sessions active",
- GNUNET_CONTAINER_multipeermap_size (plugin->session_map),
- GNUNET_NO);
- if ((GNUNET_YES == removed) && (NULL == plugin->msg_head))
- reschedule_select (plugin);
- if (GNUNET_SCHEDULER_NO_TASK != s->timeout_task)
- {
- GNUNET_SCHEDULER_cancel (s->timeout_task);
- s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
- }
- GNUNET_HELLO_address_free (s->address);
- GNUNET_free (s);
- return GNUNET_OK;
-}
-
-
-/**
* Function that is called to get the keepalive factor.
* #GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT is divided by this number to
* calculate the interval between keepalive packets.
@@ -611,7 +632,7 @@ unix_query_keepalive_factor (void *cls)
* @param send_handle which handle to send message on
* @param target who should receive this message (ignored by UNIX)
* @param msgbuf one or more GNUNET_MessageHeader(s) strung together
- * @param msgbuf_size the size of the msgbuf to send
+ * @param msgbuf_size the size of the @a msgbuf to send
* @param priority how important is the message (ignored by UNIX)
* @param timeout when should we time out (give up) if we can not transmit?
* @param addr the addr to send the message to, needs to be a sockaddr for us
@@ -644,7 +665,6 @@ unix_real_send (void *cls,
socklen_t un_len;
const char *unixpath;
- GNUNET_assert (NULL != plugin);
if (NULL == send_handle)
{
GNUNET_break (0); /* We do not have a send handle */
@@ -665,15 +685,18 @@ unix_real_send (void *cls,
return -1;
}
- if ((GNUNET_YES == plugin->abstract) &&
+ if ((GNUNET_YES == plugin->is_abstract) &&
(0 != (UNIX_OPTIONS_USE_ABSTRACT_SOCKETS & ntohl(addr->options) )) )
{
un->sun_path[0] = '\0';
}
resend:
/* Send the data */
- sent = GNUNET_NETWORK_socket_sendto (send_handle, msgbuf, msgbuf_size,
- (const struct sockaddr *) un, un_len);
+ sent = GNUNET_NETWORK_socket_sendto (send_handle,
+ msgbuf,
+ msgbuf_size,
+ (const struct sockaddr *) un,
+ un_len);
if (GNUNET_SYSERR == sent)
{
if ( (EAGAIN == errno) ||
@@ -693,12 +716,15 @@ resend:
if (size < msgbuf_size)
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Trying to increase socket buffer size from %i to %i for message size %i\n",
- size, ((msgbuf_size / 1000) + 2) * 1000, msgbuf_size);
+ "Trying to increase socket buffer size from %u to %u for message size %u\n",
+ (unsigned int) size,
+ (unsigned int) ((msgbuf_size / 1000) + 2) * 1000,
+ (unsigned int) msgbuf_size);
size = ((msgbuf_size / 1000) + 2) * 1000;
- if (GNUNET_OK == GNUNET_NETWORK_socket_setsockopt
- ((struct GNUNET_NETWORK_Handle *) send_handle, SOL_SOCKET, SO_SNDBUF,
- &size, sizeof (size)))
+ if (GNUNET_OK ==
+ GNUNET_NETWORK_socket_setsockopt ((struct GNUNET_NETWORK_Handle *) send_handle,
+ SOL_SOCKET, SO_SNDBUF,
+ &size, sizeof (size)))
goto resend; /* Increased buffer size, retry sending */
else
{
@@ -720,7 +746,7 @@ resend:
}
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "UNIX transmit %u-byte message to %s (%d: %s)\n",
+ "UNIX transmitted %u-byte message to %s (%d: %s)\n",
(unsigned int) msgbuf_size,
GNUNET_a2s ((const struct sockaddr *)un, un_len),
(int) sent,
@@ -731,28 +757,6 @@ resend:
/**
- * Session was idle for too long, so disconnect it
- *
- * @param cls the 'struct Session' to disconnect
- * @param tc scheduler context
- */
-static void
-session_timeout (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct Session *s = cls;
-
- s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Session %p was idle for %s, disconnecting\n",
- s,
- GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
- GNUNET_YES));
- unix_session_disconnect (s->plugin, s);
-}
-
-
-/**
* Function obtain the network type for a session
*
* @param cls closure ('struct Plugin*')
@@ -787,9 +791,6 @@ unix_plugin_get_session (void *cls,
uint32_t addr_str_len;
uint32_t addr_option;
- GNUNET_assert (NULL != plugin);
- GNUNET_assert (NULL != address);
-
ua = (struct UnixAddress *) address->address;
if ((NULL == address->address) || (0 == address->address_length) ||
(sizeof (struct UnixAddress) > address->address_length))
@@ -802,7 +803,7 @@ unix_plugin_get_session (void *cls,
addr_option = ntohl (ua->options);
if ( (0 != (UNIX_OPTIONS_USE_ABSTRACT_SOCKETS & addr_option)) &&
- (GNUNET_NO == plugin->abstract))
+ (GNUNET_NO == plugin->is_abstract))
{
return NULL;
}
@@ -882,101 +883,11 @@ unix_plugin_update_session_timeout (void *cls,
GNUNET_CONTAINER_multipeermap_contains_value (plugin->session_map,
&session->target,
session))
- return;
- reschedule_session_timeout (session);
-}
-
-
-/**
- * Function that can be used by the transport service to transmit
- * a message using the plugin. Note that in the case of a
- * peer disconnecting, the continuation MUST be called
- * prior to the disconnect notification itself. This function
- * will be called with this peer's HELLO message to initiate
- * a fresh connection to another peer.
- *
- * @param cls closure
- * @param session which session must be used
- * @param msgbuf the message to transmit
- * @param msgbuf_size number of bytes in @a msgbuf
- * @param priority how important is the message (most plugins will
- * ignore message priority and just FIFO)
- * @param to how long to wait at most for the transmission (does not
- * require plugins to discard the message after the timeout,
- * just advisory for the desired delay; most plugins will ignore
- * this as well)
- * @param cont continuation to call once the message has
- * been transmitted (or if the transport is ready
- * for the next transmission call; or if the
- * peer disconnected...); can be NULL
- * @param cont_cls closure for @a cont
- * @return number of bytes used (on the physical network, with overheads);
- * -1 on hard errors (i.e. address invalid); 0 is a legal value
- * and does NOT mean that the message was not transmitted (DV)
- */
-static ssize_t
-unix_plugin_send (void *cls,
- struct Session *session,
- const char *msgbuf,
- size_t msgbuf_size,
- unsigned int priority,
- struct GNUNET_TIME_Relative to,
- GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
-{
- struct Plugin *plugin = cls;
- struct UNIXMessageWrapper *wrapper;
- struct UNIXMessage *message;
- int ssize;
-
- if (GNUNET_OK !=
- GNUNET_CONTAINER_multipeermap_contains_value (plugin->session_map,
- &session->target,
- session))
{
- LOG (GNUNET_ERROR_TYPE_ERROR,
- "Invalid session for peer `%s' `%s'\n",
- GNUNET_i2s (&session->target),
- unix_address_to_string(NULL,
- session->address->address,
- session->address->address_length));
GNUNET_break (0);
- return GNUNET_SYSERR;
+ return;
}
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Sending %u bytes with session for peer `%s' `%s'\n",
- msgbuf_size,
- GNUNET_i2s (&session->target),
- unix_address_to_string (NULL,
- session->address->address,
- session->address->address_length));
- ssize = sizeof (struct UNIXMessage) + msgbuf_size;
- message = GNUNET_malloc (sizeof (struct UNIXMessage) + msgbuf_size);
- message->header.size = htons (ssize);
- message->header.type = htons (0);
- memcpy (&message->sender, plugin->env->my_identity,
- sizeof (struct GNUNET_PeerIdentity));
- memcpy (&message[1], msgbuf, msgbuf_size);
- wrapper = GNUNET_new (struct UNIXMessageWrapper);
- wrapper->msg = message;
- wrapper->msgsize = ssize;
- wrapper->payload = msgbuf_size;
- wrapper->priority = priority;
- wrapper->timeout = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
- to);
- wrapper->cont = cont;
- wrapper->cont_cls = cont_cls;
- wrapper->session = session;
- GNUNET_CONTAINER_DLL_insert (plugin->msg_head,
- plugin->msg_tail,
- wrapper);
- plugin->bytes_in_queue += ssize;
- GNUNET_STATISTICS_set (plugin->env->stats,
- "# bytes currently in UNIX buffers",
- plugin->bytes_in_queue,
- GNUNET_NO);
- if (GNUNET_NO == plugin->with_ws)
- reschedule_select (plugin);
- return ssize;
+ reschedule_session_timeout (session);
}
@@ -1008,21 +919,30 @@ unix_demultiplexer (struct Plugin *plugin, struct GNUNET_PeerIdentity *sender,
GNUNET_NO);
/* Look for existing session */
- address = GNUNET_HELLO_address_allocate (sender, PLUGIN_NAME, ua, ua_len,
- GNUNET_HELLO_ADDRESS_INFO_NONE); /* UNIX does not have "inbound" sessions */
+ address = GNUNET_HELLO_address_allocate (sender,
+ PLUGIN_NAME,
+ ua, ua_len,
+ GNUNET_HELLO_ADDRESS_INFO_NONE); /* UNIX does not have "inbound" sessions */
s = lookup_session (plugin, address);
-
if (NULL == s)
{
s = unix_plugin_get_session (plugin, address);
/* Notify transport and ATS about new inbound session */
- plugin->env->session_start (NULL, s->address, s, &plugin->ats_network, 1);
+ plugin->env->session_start (NULL,
+ s->address,
+ s,
+ &plugin->ats_network, 1);
}
GNUNET_HELLO_address_free (address);
reschedule_session_timeout (s);
- plugin->env->receive (plugin->env->cls, s->address, s, currhdr);
- plugin->env->update_address_metrics (plugin->env->cls, s->address, s,
+ plugin->env->receive (plugin->env->cls,
+ s->address,
+ s,
+ currhdr);
+ plugin->env->update_address_metrics (plugin->env->cls,
+ s->address,
+ s,
&plugin->ats_network, 1);
}
@@ -1033,7 +953,7 @@ unix_demultiplexer (struct Plugin *plugin, struct GNUNET_PeerIdentity *sender,
* @param plugin the plugin
*/
static void
-unix_plugin_select_read (struct Plugin *plugin)
+unix_plugin_do_read (struct Plugin *plugin)
{
char buf[65536] GNUNET_ALIGN;
struct UnixAddress *ua;
@@ -1052,17 +972,16 @@ unix_plugin_select_read (struct Plugin *plugin)
addrlen = sizeof (un);
memset (&un, 0, sizeof (un));
-
- ret =
- GNUNET_NETWORK_socket_recvfrom (plugin->unix_sock.desc, buf, sizeof (buf),
- (struct sockaddr *) &un, &addrlen);
-
+ ret = GNUNET_NETWORK_socket_recvfrom (plugin->unix_sock.desc,
+ buf, sizeof (buf),
+ (struct sockaddr *) &un,
+ &addrlen);
if ((GNUNET_SYSERR == ret) && ((errno == EAGAIN) || (errno == ENOBUFS)))
return;
-
- if (ret == GNUNET_SYSERR)
+ if (GNUNET_SYSERR == ret)
{
- GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "recvfrom");
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
+ "recvfrom");
return;
}
else
@@ -1122,15 +1041,16 @@ unix_plugin_select_read (struct Plugin *plugin)
/**
* Write to UNIX domain socket (it is ready).
*
- * @param plugin the plugin
+ * @param session session to write data for
*/
static void
-unix_plugin_select_write (struct Plugin *plugin)
+unix_plugin_do_write (struct Plugin *plugin)
{
- int sent = 0;
- struct UNIXMessageWrapper * msgw;
+ ssize_t sent = 0;
+ struct UNIXMessageWrapper *msgw;
+ struct Session *session;
- while (NULL != (msgw = plugin->msg_tail))
+ while (NULL != (msgw = plugin->msg_head))
{
if (GNUNET_TIME_absolute_get_remaining (msgw->timeout).rel_value_us > 0)
break; /* Message is ready for sending */
@@ -1138,11 +1058,19 @@ unix_plugin_select_write (struct Plugin *plugin)
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Timeout for message with %u bytes \n",
(unsigned int) msgw->msgsize);
- GNUNET_CONTAINER_DLL_remove (plugin->msg_head, plugin->msg_tail, msgw);
+ GNUNET_CONTAINER_DLL_remove (plugin->msg_head,
+ plugin->msg_tail,
+ msgw);
+ session = msgw->session;
+ session->msgs_in_queue--;
+ GNUNET_assert (session->bytes_in_queue >= msgw->msgsize);
+ session->bytes_in_queue -= msgw->msgsize;
+ GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
plugin->bytes_in_queue -= msgw->msgsize;
GNUNET_STATISTICS_set (plugin->env->stats,
"# bytes currently in UNIX buffers",
- plugin->bytes_in_queue, GNUNET_NO);
+ plugin->bytes_in_queue,
+ GNUNET_NO);
GNUNET_STATISTICS_update (plugin->env->stats,
"# UNIX bytes discarded",
msgw->msgsize,
@@ -1178,45 +1106,43 @@ unix_plugin_select_write (struct Plugin *plugin)
1, GNUNET_NO);
return;
}
+ GNUNET_CONTAINER_DLL_remove (plugin->msg_head,
+ plugin->msg_tail,
+ msgw);
+ session = msgw->session;
+ session->msgs_in_queue--;
+ GNUNET_assert (session->bytes_in_queue >= msgw->msgsize);
+ session->bytes_in_queue -= msgw->msgsize;
+ GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
+ plugin->bytes_in_queue -= msgw->msgsize;
+ GNUNET_STATISTICS_set (plugin->env->stats,
+ "# bytes currently in UNIX buffers",
+ plugin->bytes_in_queue, GNUNET_NO);
if (GNUNET_SYSERR == sent)
{
/* failed and no retry */
if (NULL != msgw->cont)
- msgw->cont (msgw->cont_cls, &msgw->session->target, GNUNET_SYSERR, msgw->payload, 0);
-
- GNUNET_CONTAINER_DLL_remove(plugin->msg_head, plugin->msg_tail, msgw);
-
- GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
- plugin->bytes_in_queue -= msgw->msgsize;
- GNUNET_STATISTICS_set (plugin->env->stats,
- "# bytes currently in UNIX buffers",
- plugin->bytes_in_queue, GNUNET_NO);
+ msgw->cont (msgw->cont_cls,
+ &msgw->session->target,
+ GNUNET_SYSERR,
+ msgw->payload, 0);
GNUNET_STATISTICS_update (plugin->env->stats,
"# UNIX bytes discarded",
msgw->msgsize,
GNUNET_NO);
-
GNUNET_free (msgw->msg);
GNUNET_free (msgw);
return;
}
/* successfully sent bytes */
GNUNET_break (sent > 0);
- GNUNET_CONTAINER_DLL_remove (plugin->msg_head,
- plugin->msg_tail,
- msgw);
- GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
- plugin->bytes_in_queue -= msgw->msgsize;
- GNUNET_STATISTICS_set (plugin->env->stats,
- "# bytes currently in UNIX buffers",
- plugin->bytes_in_queue,
- GNUNET_NO);
GNUNET_STATISTICS_update (plugin->env->stats,
"# bytes transmitted via UNIX",
msgw->msgsize,
GNUNET_NO);
if (NULL != msgw->cont)
- msgw->cont (msgw->cont_cls, &msgw->session->target,
+ msgw->cont (msgw->cont_cls,
+ &msgw->session->target,
GNUNET_OK,
msgw->payload,
msgw->msgsize);
@@ -1226,47 +1152,160 @@ unix_plugin_select_write (struct Plugin *plugin)
/**
- * We have been notified that our writeset has something to read. We don't
- * know which socket needs to be read, so we have to check each one
+ * We have been notified that our socket has something to read.
* Then reschedule this function to be called again once more is available.
*
* @param cls the plugin handle
- * @param tc the scheduling context (for rescheduling this function again)
+ * @param tc the scheduling context
*/
static void
-unix_plugin_select (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+unix_plugin_select_read (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct Plugin *plugin = cls;
- plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
- if ((tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
+ plugin->read_task = GNUNET_SCHEDULER_NO_TASK;
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
return;
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY))
+ unix_plugin_do_read (plugin);
+ plugin->read_task =
+ GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
+ plugin->unix_sock.desc,
+ &unix_plugin_select_read, plugin);
+}
- if ((tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY) != 0)
- {
- /* Ready to send data */
- GNUNET_assert (GNUNET_NETWORK_fdset_isset
- (tc->write_ready, plugin->unix_sock.desc));
- if (NULL != plugin->msg_head)
- unix_plugin_select_write (plugin);
- }
- if ((tc->reason & GNUNET_SCHEDULER_REASON_READ_READY) != 0)
+/**
+ * We have been notified that our socket is ready to write.
+ * Then reschedule this function to be called again once more is available.
+ *
+ * @param cls the plugin handle
+ * @param tc the scheduling context
+ */
+static void
+unix_plugin_select_write (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct Plugin *plugin = cls;
+
+ plugin->write_task = GNUNET_SCHEDULER_NO_TASK;
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
+ return;
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY))
+ unix_plugin_do_write (plugin);
+ if (NULL == plugin->msg_head)
+ return; /* write queue empty */
+ plugin->write_task =
+ GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
+ plugin->unix_sock.desc,
+ &unix_plugin_select_write, plugin);
+}
+
+
+/**
+ * Function that can be used by the transport service to transmit
+ * a message using the plugin. Note that in the case of a
+ * peer disconnecting, the continuation MUST be called
+ * prior to the disconnect notification itself. This function
+ * will be called with this peer's HELLO message to initiate
+ * a fresh connection to another peer.
+ *
+ * @param cls closure
+ * @param session which session must be used
+ * @param msgbuf the message to transmit
+ * @param msgbuf_size number of bytes in @a msgbuf
+ * @param priority how important is the message (most plugins will
+ * ignore message priority and just FIFO)
+ * @param to how long to wait at most for the transmission (does not
+ * require plugins to discard the message after the timeout,
+ * just advisory for the desired delay; most plugins will ignore
+ * this as well)
+ * @param cont continuation to call once the message has
+ * been transmitted (or if the transport is ready
+ * for the next transmission call; or if the
+ * peer disconnected...); can be NULL
+ * @param cont_cls closure for @a cont
+ * @return number of bytes used (on the physical network, with overheads);
+ * -1 on hard errors (i.e. address invalid); 0 is a legal value
+ * and does NOT mean that the message was not transmitted (DV)
+ */
+static ssize_t
+unix_plugin_send (void *cls,
+ struct Session *session,
+ const char *msgbuf,
+ size_t msgbuf_size,
+ unsigned int priority,
+ struct GNUNET_TIME_Relative to,
+ GNUNET_TRANSPORT_TransmitContinuation cont,
+ void *cont_cls)
+{
+ struct Plugin *plugin = cls;
+ struct UNIXMessageWrapper *wrapper;
+ struct UNIXMessage *message;
+ int ssize;
+
+ if (GNUNET_OK !=
+ GNUNET_CONTAINER_multipeermap_contains_value (plugin->session_map,
+ &session->target,
+ session))
{
- /* Ready to receive data */
- GNUNET_assert (GNUNET_NETWORK_fdset_isset
- (tc->read_ready, plugin->unix_sock.desc));
- unix_plugin_select_read (plugin);
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ "Invalid session for peer `%s' `%s'\n",
+ GNUNET_i2s (&session->target),
+ unix_address_to_string(NULL,
+ session->address->address,
+ session->address->address_length));
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
}
- reschedule_select (plugin);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending %u bytes with session for peer `%s' `%s'\n",
+ msgbuf_size,
+ GNUNET_i2s (&session->target),
+ unix_address_to_string (NULL,
+ session->address->address,
+ session->address->address_length));
+ ssize = sizeof (struct UNIXMessage) + msgbuf_size;
+ message = GNUNET_malloc (sizeof (struct UNIXMessage) + msgbuf_size);
+ message->header.size = htons (ssize);
+ message->header.type = htons (0);
+ memcpy (&message->sender, plugin->env->my_identity,
+ sizeof (struct GNUNET_PeerIdentity));
+ memcpy (&message[1], msgbuf, msgbuf_size);
+ wrapper = GNUNET_new (struct UNIXMessageWrapper);
+ wrapper->msg = message;
+ wrapper->msgsize = ssize;
+ wrapper->payload = msgbuf_size;
+ wrapper->priority = priority;
+ wrapper->timeout = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
+ to);
+ wrapper->cont = cont;
+ wrapper->cont_cls = cont_cls;
+ wrapper->session = session;
+ GNUNET_CONTAINER_DLL_insert_tail (plugin->msg_head,
+ plugin->msg_tail,
+ wrapper);
+ plugin->bytes_in_queue += ssize;
+ session->bytes_in_queue += ssize;
+ session->msgs_in_queue++;
+ GNUNET_STATISTICS_set (plugin->env->stats,
+ "# bytes currently in UNIX buffers",
+ plugin->bytes_in_queue,
+ GNUNET_NO);
+ if (GNUNET_SCHEDULER_NO_TASK == plugin->write_task)
+ plugin->write_task =
+ GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
+ plugin->unix_sock.desc,
+ &unix_plugin_select_write, plugin);
+ return ssize;
}
/**
* Create a slew of UNIX sockets. If possible, use IPv6 and IPv4.
*
- * @param cls closure for server start, should be a struct Plugin *
+ * @param cls closure for server start, should be a `struct Plugin *`
* @return number of sockets created or #GNUNET_SYSERR on error
*/
static int
@@ -1278,7 +1317,7 @@ unix_transport_server_start (void *cls)
un = unix_address_to_sockaddr (plugin->unix_socket_path,
&un_len);
- if (GNUNET_YES == plugin->abstract)
+ if (GNUNET_YES == plugin->is_abstract)
{
plugin->unix_socket_path[0] = '@';
un->sun_path[0] = '\0';
@@ -1304,7 +1343,8 @@ unix_transport_server_start (void *cls)
}
}
if (GNUNET_OK !=
- GNUNET_NETWORK_socket_bind (plugin->unix_sock.desc, (const struct sockaddr *) un, un_len))
+ GNUNET_NETWORK_socket_bind (plugin->unix_sock.desc,
+ (const struct sockaddr *) un, un_len))
{
GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "bind");
GNUNET_NETWORK_socket_close (plugin->unix_sock.desc);
@@ -1312,15 +1352,13 @@ unix_transport_server_start (void *cls)
GNUNET_free (un);
return GNUNET_SYSERR;
}
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Bound to `%s'\n", plugin->unix_socket_path);
- plugin->rs = GNUNET_NETWORK_fdset_create ();
- plugin->ws = GNUNET_NETWORK_fdset_create ();
- GNUNET_NETWORK_fdset_zero (plugin->rs);
- GNUNET_NETWORK_fdset_zero (plugin->ws);
- GNUNET_NETWORK_fdset_set (plugin->rs, plugin->unix_sock.desc);
- GNUNET_NETWORK_fdset_set (plugin->ws, plugin->unix_sock.desc);
-
- reschedule_select (plugin);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Bound to `%s'\n",
+ plugin->unix_socket_path);
+ plugin->read_task =
+ GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
+ plugin->unix_sock.desc,
+ &unix_plugin_select_read, plugin);
GNUNET_free (un);
return 1;
}
@@ -1430,7 +1468,8 @@ unix_plugin_address_pretty_printer (void *cls, const char *type,
*/
static int
unix_string_to_address (void *cls,
- const char *addr, uint16_t addrlen,
+ const char *addr,
+ uint16_t addrlen,
void **buf, size_t *added)
{
struct UnixAddress *ua;
@@ -1538,28 +1577,6 @@ address_notification (void *cls,
/**
- * Increment session timeout due to activity
- *
- * @param s session for which the timeout should be rescheduled
- */
-static void
-reschedule_session_timeout (struct Session *s)
-{
- GNUNET_assert (NULL != s);
- GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != s->timeout_task);
- GNUNET_SCHEDULER_cancel (s->timeout_task);
- s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
- &session_timeout,
- s);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Timeout rescheduled for session %p set to %s\n",
- s,
- GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
- GNUNET_YES));
-}
-
-
-/**
* Function called on sessions to disconnect
*
* @param cls the plugin
@@ -1619,12 +1636,14 @@ send_session_info_iter (void *cls,
struct GNUNET_TRANSPORT_SessionInfo info;
memset (&info, 0, sizeof (info));
- info.state = GNUNET_TRANSPORT_SS_UP; /* ??? */
- // FIXME: info->is_inbound = ?
- // FIXME: info->num_msg_pending = ?
- // FIXME: info->num_bytes_pending = ?
- // FIXME: info->receive_delay = ?
- // FIXME: info->session_timeout = ?
+ info.state = GNUNET_TRANSPORT_SS_UP; /* all are up if we have them */
+ info.is_inbound = GNUNET_SYSERR; /* hard to say */
+ info.num_msg_pending = session->msgs_in_queue;
+ info.num_bytes_pending = session->bytes_in_queue;
+ /* info.receive_delay remains zero as this is not supported by UNIX
+ (cannot selectively not receive from 'some' peer while continuing
+ to receive from others) */
+ info.session_timeout = session->timeout;
info.address = session->address;
plugin->sic (plugin->sic_cls,
session,
@@ -1690,11 +1709,14 @@ libgnunet_plugin_transport_unix_init (void *cls)
plugin = GNUNET_new (struct Plugin);
if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_filename(env->cfg, "transport-unix", "UNIXPATH",
- &plugin->unix_socket_path))
+ GNUNET_CONFIGURATION_get_value_filename (env->cfg,
+ "transport-unix",
+ "UNIXPATH",
+ &plugin->unix_socket_path))
{
- LOG (GNUNET_ERROR_TYPE_ERROR,
- _("No UNIXPATH given in configuration!\n"));
+ GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
+ "transport-unix",
+ "UNIXPATH");
GNUNET_free (plugin);
return NULL;
}
@@ -1703,14 +1725,13 @@ libgnunet_plugin_transport_unix_init (void *cls)
/* Initialize my flags */
#ifdef LINUX
- plugin->abstract = GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
- "testing", "USE_ABSTRACT_SOCKETS");
+ plugin->is_abstract = GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
+ "testing",
+ "USE_ABSTRACT_SOCKETS");
#endif
plugin->myoptions = UNIX_OPTIONS_NONE;
- if (GNUNET_YES == plugin->abstract)
- {
+ if (GNUNET_YES == plugin->is_abstract)
plugin->myoptions = UNIX_OPTIONS_USE_ABSTRACT_SOCKETS;
- }
api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
api->cls = plugin;
@@ -1758,6 +1779,7 @@ libgnunet_plugin_transport_unix_done (void *cls)
struct UNIXMessageWrapper * msgw;
struct UnixAddress *ua;
size_t len;
+ struct Session *session;
if (NULL == plugin)
{
@@ -1787,6 +1809,12 @@ libgnunet_plugin_transport_unix_done (void *cls)
GNUNET_CONTAINER_DLL_remove (plugin->msg_head,
plugin->msg_tail,
msgw);
+ session = msgw->session;
+ session->msgs_in_queue--;
+ GNUNET_assert (session->bytes_in_queue >= msgw->msgsize);
+ session->bytes_in_queue -= msgw->msgsize;
+ GNUNET_assert (plugin->bytes_in_queue >= msgw->msgsize);
+ plugin->bytes_in_queue -= msgw->msgsize;
if (NULL != msgw->cont)
msgw->cont (msgw->cont_cls,
&msgw->session->target,
@@ -1796,10 +1824,15 @@ libgnunet_plugin_transport_unix_done (void *cls)
GNUNET_free (msgw);
}
- if (GNUNET_SCHEDULER_NO_TASK != plugin->select_task)
+ if (GNUNET_SCHEDULER_NO_TASK != plugin->read_task)
+ {
+ GNUNET_SCHEDULER_cancel (plugin->read_task);
+ plugin->read_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ if (GNUNET_SCHEDULER_NO_TASK != plugin->write_task)
{
- GNUNET_SCHEDULER_cancel (plugin->select_task);
- plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
+ GNUNET_SCHEDULER_cancel (plugin->write_task);
+ plugin->write_task = GNUNET_SCHEDULER_NO_TASK;
}
if (GNUNET_SCHEDULER_NO_TASK != plugin->address_update_task)
{
@@ -1811,15 +1844,12 @@ libgnunet_plugin_transport_unix_done (void *cls)
GNUNET_break (GNUNET_OK ==
GNUNET_NETWORK_socket_close (plugin->unix_sock.desc));
plugin->unix_sock.desc = NULL;
- plugin->with_ws = GNUNET_NO;
}
GNUNET_CONTAINER_multipeermap_iterate (plugin->session_map,
- &get_session_delete_it, plugin);
+ &get_session_delete_it,
+ plugin);
GNUNET_CONTAINER_multipeermap_destroy (plugin->session_map);
- if (NULL != plugin->rs)
- GNUNET_NETWORK_fdset_destroy (plugin->rs);
- if (NULL != plugin->ws)
- GNUNET_NETWORK_fdset_destroy (plugin->ws);
+ GNUNET_break (0 == plugin->bytes_in_queue);
GNUNET_free (plugin->unix_socket_path);
GNUNET_free (plugin);
GNUNET_free (api);