/*
This file is part of GNUnet
- (C) 2010 Christian Grothoff (and other contributing authors)
+ (C) 2010, 2013 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
* @author Christian Grothoff
* @author Nathan Evans
*/
-
#include "platform.h"
#include "gnunet_hello_lib.h"
-#include "gnunet_connection_lib.h"
-#include "gnunet_container_lib.h"
-#include "gnunet_os_lib.h"
-#include "gnunet_peerinfo_service.h"
+#include "gnunet_util_lib.h"
#include "gnunet_protocols.h"
-#include "gnunet_resolver_service.h"
-#include "gnunet_server_lib.h"
-#include "gnunet_signatures.h"
#include "gnunet_statistics_service.h"
#include "gnunet_transport_service.h"
#include "gnunet_transport_plugin.h"
#include "transport.h"
-#define DEBUG_UNIX GNUNET_NO
-#define DETAILS GNUNET_NO
-
-#define MAX_PROBES 20
-/*
- * Transport cost to peer, always 1 for UNIX (direct connection)
+/**
+ * Return code we give on 'send' if we failed to send right now
+ * but it makes sense to retry later. (Note: we might want to
+ * move this to the plugin API!?).
*/
-#define UNIX_DIRECT_DISTANCE 1
-
-#define DEFAULT_NAT_PORT 0
+#define RETRY 0
/**
* How long until we give up on transmitting the welcome message?
#define HOSTNAME_RESOLVE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)
/**
- * Starting port for listening and sending, eventually a config value
+ * Default "port" to use, if configuration does not specify.
+ * Essentially just a number appended to the UNIX path.
*/
#define UNIX_NAT_DEFAULT_PORT 22086
+
+#define LOG(kind,...) GNUNET_log_from (kind, "transport-unix",__VA_ARGS__)
+
+
+GNUNET_NETWORK_STRUCT_BEGIN
+
/**
* UNIX Message-Packet header.
*/
};
-struct RetryList
-{
- /**
- * Pointer to next element.
- */
- struct RetryList *next;
-
- /**
- * Pointer to previous element.
- */
- struct RetryList *prev;
-
- /**
- * The actual retry context.
- */
- struct RetrySendContext *retry_ctx;
-};
/**
- * Network format for IPv4 addresses.
+ * Handle for a session.
*/
-struct IPv4UdpAddress
+struct Session
{
- /**
- * IPv4 address, in network byte order.
- */
- uint32_t ipv4_addr GNUNET_PACKED;
+ struct GNUNET_PeerIdentity target;
- /**
- * Port number, in network byte order.
- */
- uint16_t u_port GNUNET_PACKED;
-};
+ struct Plugin * plugin;
+ void *addr;
-/**
- * Network format for IPv6 addresses.
- */
-struct IPv6UdpAddress
-{
- /**
- * IPv6 address.
- */
- struct in6_addr ipv6_addr GNUNET_PACKED;
+ size_t addrlen;
/**
- * Port number, in network byte order.
+ * Session timeout task
*/
- uint16_t u6_port GNUNET_PACKED;
+ GNUNET_SCHEDULER_TaskIdentifier timeout_task;
};
-/* Forward definition */
-struct Plugin;
-struct PrettyPrinterContext
+struct UNIXMessageWrapper
{
- GNUNET_TRANSPORT_AddressStringCallback asc;
- void *asc_cls;
- uint16_t port;
-};
-
-struct RetrySendContext
-{
-
/**
- * Main plugin handle.
+ * We keep messages in a doubly linked list.
*/
- struct Plugin *plugin;
+ struct UNIXMessageWrapper *next;
/**
- * Address of recipient.
+ * We keep messages in a doubly linked list.
*/
- char *addr;
+ struct UNIXMessageWrapper *prev;
/**
- * Length of address.
+ * The actual payload (allocated separately right now).
*/
- ssize_t addrlen;
+ struct UNIXMessage * msg;
/**
- * Message to send.
+ * Session this message belongs to.
*/
- char *msg;
+ struct Session *session;
/**
- * Size of the message.
- */
- int msg_size;
-
- /**
- * Handle to send message out on.
- */
- struct GNUNET_NETWORK_Handle *send_handle;
-
- /**
- * Continuation to call on success or
- * timeout.
+ * Function to call upon transmission.
*/
GNUNET_TRANSPORT_TransmitContinuation cont;
/**
- * Closure for continuation.
+ * Closure for 'cont'.
*/
void *cont_cls;
/**
- * The peer the message is destined for.
- */
- struct GNUNET_PeerIdentity target;
-
- /**
- * How long before not retrying any longer.
+ * Timeout for this message.
*/
struct GNUNET_TIME_Absolute timeout;
/**
- * How long the last message was delayed.
+ * Number of bytes in 'msg'.
*/
- struct GNUNET_TIME_Relative delay;
+ size_t msgsize;
/**
- * The actual retry task.
+ * Number of bytes of payload encapsulated in 'msg'.
*/
- GNUNET_SCHEDULER_TaskIdentifier retry_task;
+ size_t payload;
/**
- * The priority of the message.
+ * Priority of the message (ignored, just dragged along in UNIX).
*/
unsigned int priority;
-
- /**
- * Entry in the DLL of retry items.
- */
- struct RetryList *retry_list_entry;
};
/**
- * UNIX NAT "Session"
+ * Encapsulation of all of the state of the plugin.
+ */
+struct Plugin;
+
+
+/**
+ * UNIX "Session"
*/
struct PeerSession
{
};
+
/**
* Information we keep for each of our listen sockets.
*/
struct GNUNET_NETWORK_Handle *desc;
/**
- * The port we bound to
+ * The port we bound to (not an actual PORT, as UNIX domain sockets
+ * don't have ports, but rather a number in the path name to make this
+ * one unique).
*/
uint16_t port;
};
*/
struct Plugin
{
- /**
- * Our environment.
- */
- struct GNUNET_TRANSPORT_PluginEnvironment *env;
-
- /*
- * Session of peers with whom we are currently connected
- */
- struct PeerSession *sessions;
/**
* ID of task used to update our addresses when one expires.
GNUNET_SCHEDULER_TaskIdentifier select_task;
/**
- * Integer to append to unix domain socket.
+ * Number of bytes we currently have in our write queue.
*/
- uint16_t port;
+ unsigned long long bytes_in_queue;
+
+ /**
+ * Our environment.
+ */
+ struct GNUNET_TRANSPORT_PluginEnvironment *env;
+
+ /**
+ * Sessions
+ */
+ struct GNUNET_CONTAINER_MultiHashMap *session_map;
/**
* FD Read set
struct GNUNET_NETWORK_FDSet *rs;
/**
- * socket that we transmit all data with
+ * FD Write set
*/
- struct UNIX_Sock_Info unix_sock;
+ struct GNUNET_NETWORK_FDSet *ws;
/**
* Path of our unix domain socket (/tmp/unix-plugin-PORT)
*/
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;
+
+ /**
+ * socket that we transmit all data with
+ */
+ struct UNIX_Sock_Info unix_sock;
+
+ /**
+ * ATS network
+ */
+ 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;
+
+ /**
+ * Integer to append to unix domain socket.
+ */
+ uint16_t port;
+
};
+
/**
- * Head of retry DLL.
+ * Increment session timeout due to activity
+ *
+ * @param s session for which the timeout should be moved
*/
-static struct RetryList *retry_list_head;
+static void
+reschedule_session_timeout (struct Session *s);
+
/**
- * Tail of retry DLL.
+ * 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 struct RetryList *retry_list_tail;
+static void
+unix_plugin_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
/**
- * Disconnect from a remote node. Clean up session if we have one for this peer
+ * Re-schedule the main 'select' callback (unix_plugin_select)
+ * for this plugin.
*
- * @param cls closure for this call (should be handle to Plugin)
- * @param target the peeridentity of the peer to disconnect
- * @return GNUNET_OK on success, GNUNET_SYSERR if the operation failed
+ * @param plugin the plugin context
*/
-void
-unix_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
+static void
+reschedule_select (struct Plugin * plugin)
{
- /** TODO: Implement! */
- return;
+ 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)
+ {
+ 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;
+ }
+ else
+ {
+ 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;
+ }
}
+
/**
- * Shutdown the server process (stop receiving inbound traffic). Maybe
- * restarted later!
- *
- * @param cls Handle to the plugin for this transport
- *
- * @return returns the number of sockets successfully closed,
- * should equal the number of sockets successfully opened
+ * Closure to 'lookup_session_it'.
*/
-static int
-unix_transport_server_stop (void *cls)
+struct LookupCtx
{
- struct Plugin *plugin = cls;
- struct RetryList *pos;
+ /**
+ * Location to store the session, if found.
+ */
+ struct Session *s;
- pos = retry_list_head;
+ /**
+ * Address we are looking for.
+ */
+ const struct sockaddr_un *addr;
+};
- while(NULL != (pos = retry_list_head))
- {
- GNUNET_CONTAINER_DLL_remove(retry_list_head, retry_list_tail, pos);
- if (GNUNET_SCHEDULER_NO_TASK != pos->retry_ctx->retry_task)
- {
- GNUNET_SCHEDULER_cancel(pos->retry_ctx->retry_task);
- }
- GNUNET_free(pos->retry_ctx->msg);
- GNUNET_free(pos->retry_ctx->addr);
- GNUNET_free(pos->retry_ctx);
- GNUNET_free(pos);
- }
- if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
- {
- GNUNET_SCHEDULER_cancel (plugin->select_task);
- plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
- }
-
- GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->unix_sock.desc));
- plugin->unix_sock.desc = NULL;
+/**
+ * Function called to find a session by address.
+ *
+ * @param cls the 'struct LookupCtx'
+ * @param key peer we are looking for (unused)
+ * @param value a session
+ * @return GNUNET_YES if not found (continue looking), GNUNET_NO on success
+ */
+static int
+lookup_session_it (void *cls,
+ const struct GNUNET_HashCode * key,
+ void *value)
+{
+ struct LookupCtx *lctx = cls;
+ struct Session *t = value;
- return GNUNET_OK;
+ if (0 == strcmp (t->addr, lctx->addr->sun_path))
+ {
+ lctx->s = t;
+ return GNUNET_NO;
+ }
+ return GNUNET_YES;
}
-struct PeerSession *
-find_session (struct Plugin *plugin,
- const struct GNUNET_PeerIdentity *peer)
+/**
+ * Find an existing session by address.
+ *
+ * @param plugin the plugin
+ * @param sender for which peer should the session be?
+ * @param addr address to look for
+ * @return NULL if session was not found
+ */
+static struct Session *
+lookup_session (struct Plugin *plugin,
+ const struct GNUNET_PeerIdentity *sender,
+ const struct sockaddr_un *addr)
{
- struct PeerSession *pos;
-
- pos = plugin->sessions;
- while (pos != NULL)
- {
- if (memcmp(&pos->target, peer, sizeof(struct GNUNET_PeerIdentity)) == 0)
- return pos;
- pos = pos->next;
- }
-
- return pos;
+ struct LookupCtx lctx;
+
+ GNUNET_assert (NULL != plugin);
+ GNUNET_assert (NULL != sender);
+ GNUNET_assert (NULL != addr);
+ lctx.s = NULL;
+ lctx.addr = addr;
+ GNUNET_CONTAINER_multihashmap_get_multiple (plugin->session_map,
+ &sender->hashPubKey,
+ &lookup_session_it, &lctx);
+ return lctx.s;
}
-/* Forward Declaration */
-static ssize_t
-unix_real_send (void *cls,
- struct RetrySendContext *incoming_retry_context,
- struct GNUNET_NETWORK_Handle *send_handle,
- const struct GNUNET_PeerIdentity *target,
- const char *msgbuf,
- size_t msgbuf_size,
- unsigned int priority,
- struct GNUNET_TIME_Relative timeout,
- const void *addr,
- size_t addrlen,
- GNUNET_TRANSPORT_TransmitContinuation cont,
- void *cont_cls);
/**
- * Retry sending a message.
+ * 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 a struct RetrySendContext
- * @param tc context information
+ * @param s session to close down
*/
-void retry_send_message (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext * tc)
+static void
+disconnect_session (struct Session *s)
{
- struct RetrySendContext *retry_ctx = cls;
-
- if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
- {
- GNUNET_free(retry_ctx->msg);
- GNUNET_free(retry_ctx->addr);
- GNUNET_free(retry_ctx);
- return;
- }
-
- unix_real_send (retry_ctx->plugin,
- retry_ctx,
- retry_ctx->send_handle,
- &retry_ctx->target,
- retry_ctx->msg,
- retry_ctx->msg_size,
- retry_ctx->priority,
- GNUNET_TIME_absolute_get_remaining (retry_ctx->timeout),
- retry_ctx->addr,
- retry_ctx->addrlen,
- retry_ctx->cont,
- retry_ctx->cont_cls);
- return;
+ struct Plugin *plugin = s->plugin;
+ struct UNIXMessageWrapper *msgw;
+ struct UNIXMessageWrapper *next;
+ int removed;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Disconnecting session for peer `%s' `%s'\n",
+ GNUNET_i2s (&s->target),
+ s->addr);
+ plugin->env->session_end (plugin->env->cls, &s->target, 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_multihashmap_remove (plugin->session_map,
+ &s->target.hashPubKey,
+ s));
+ GNUNET_STATISTICS_set (plugin->env->stats,
+ "# UNIX sessions active",
+ GNUNET_CONTAINER_multihashmap_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_free (s);
}
+
/**
* Actually send out the message, assume we've got the address and
* send_handle squared away!
*
* @param cls closure
- * @param incoming_retry_context the retry context to use
* @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 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
* @param addrlen the len of addr
+ * @param payload bytes payload to send
* @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...)
* @param cont_cls closure for cont
- *
- * @return the number of bytes written, -1 on errors
+ * @return on success the number of bytes written, RETRY for retry, -1 on errors
*/
static ssize_t
unix_real_send (void *cls,
- struct RetrySendContext *incoming_retry_context,
struct GNUNET_NETWORK_Handle *send_handle,
- const struct GNUNET_PeerIdentity *target,
- const char *msgbuf,
- size_t msgbuf_size,
- unsigned int priority,
- struct GNUNET_TIME_Relative timeout,
- const void *addr,
- size_t addrlen,
- GNUNET_TRANSPORT_TransmitContinuation cont,
- void *cont_cls)
+ const struct GNUNET_PeerIdentity *target, const char *msgbuf,
+ size_t msgbuf_size, unsigned int priority,
+ struct GNUNET_TIME_Absolute timeout,
+ const void *addr,
+ size_t addrlen,
+ size_t payload,
+ GNUNET_TRANSPORT_TransmitContinuation cont,
+ void *cont_cls)
{
struct Plugin *plugin = cls;
- struct UNIXMessage *message;
- struct RetrySendContext *retry_ctx;
- int ssize;
ssize_t sent;
const void *sb;
size_t sbs;
struct sockaddr_un un;
size_t slen;
- struct RetryList *retry_list_entry;
- int retry;
-
- if (send_handle == NULL)
- {
-#if DEBUG_UNIX
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "unix_real_send with send_handle NULL!\n");
-#endif
- /* failed to open send socket for AF */
- if (cont != NULL)
- cont (cont_cls, target, GNUNET_SYSERR);
- return 0;
- }
- if ((addr == NULL) || (addrlen == 0))
- {
-#if DEBUG_UNIX
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "unix_real_send called without address, returning!\n");
-#endif
- if (cont != NULL)
- cont (cont_cls, target, GNUNET_SYSERR);
- return 0; /* Can never send if we don't have an address!! */
- }
- /* Build the message to be sent */
- message = GNUNET_malloc (sizeof (struct UNIXMessage) + msgbuf_size);
- ssize = 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);
+ GNUNET_assert (NULL != plugin);
+ if (NULL == send_handle)
+ {
+ GNUNET_break (0); /* We do not have a send handle */
+ return GNUNET_SYSERR;
+ }
+ if ((NULL == addr) || (0 == addrlen))
+ {
+ GNUNET_break (0); /* Can never send if we don't have an address */
+ return GNUNET_SYSERR;
+ }
- memset(&un, 0, sizeof(un));
+ /* Prepare address */
+ memset (&un, 0, sizeof (un));
un.sun_family = AF_UNIX;
slen = strlen (addr) + 1;
if (slen >= sizeof (un.sun_path))
slen = sizeof (un.sun_path) - 1;
- sent = 0;
- GNUNET_assert(slen < sizeof(un.sun_path));
+ GNUNET_assert (slen < sizeof (un.sun_path));
memcpy (un.sun_path, addr, slen);
un.sun_path[slen] = '\0';
slen = sizeof (struct sockaddr_un);
#if HAVE_SOCKADDR_IN_SIN_LEN
un.sun_len = (u_char) slen;
#endif
- sb = (struct sockaddr*) &un;
+ sb = (struct sockaddr *) &un;
sbs = slen;
- retry = GNUNET_NO;
- sent = GNUNET_NETWORK_socket_sendto(send_handle, message, ssize, sb, sbs);
-
- if ((GNUNET_SYSERR == sent) && (errno == EAGAIN))
- retry = GNUNET_YES;
+resend:
+ /* Send the data */
+ sent = 0;
+ sent = GNUNET_NETWORK_socket_sendto (send_handle, msgbuf, msgbuf_size, sb, sbs);
- if ((GNUNET_SYSERR == sent) && (errno == EMSGSIZE))
+ if (GNUNET_SYSERR == sent)
{
- socklen_t size = 0;
- socklen_t len = sizeof (size);
- GNUNET_NETWORK_socket_getsockopt ((struct GNUNET_NETWORK_Handle * ) send_handle,
- SOL_SOCKET,
- SO_SNDBUF,
- &size, &len);
-
- if (size < ssize)
- {
-#if DEBUG_UNIX
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Trying to increase socket buffer size from %i to %i for message size %i\n",
- size,
- ((ssize / 1000) + 2) * 1000, ssize);
-#endif
- size = ((ssize / 1000) + 2) * 1000;
- if (GNUNET_NETWORK_socket_setsockopt ((struct GNUNET_NETWORK_Handle * ) send_handle,
- SOL_SOCKET,
- SO_SNDBUF,
- &size, sizeof(size)) == GNUNET_OK)
- retry = GNUNET_YES;
- else
- GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "setsockopt");
- }
- }
-
- if (retry == GNUNET_YES)
+ if ( (EAGAIN == errno) ||
+ (ENOBUFS == errno) )
+ return RETRY; /* We have to retry later */
+ if (EMSGSIZE == errno)
{
- if (incoming_retry_context == NULL)
+ socklen_t size = 0;
+ socklen_t len = sizeof (size);
+
+ GNUNET_NETWORK_socket_getsockopt ((struct GNUNET_NETWORK_Handle *)
+ send_handle, SOL_SOCKET, SO_SNDBUF, &size,
+ &len);
+ 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);
+ 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)))
+ goto resend; /* Increased buffer size, retry sending */
+ else
{
- retry_list_entry = GNUNET_malloc(sizeof(struct RetryList));
- retry_ctx = GNUNET_malloc(sizeof(struct RetrySendContext));
- retry_ctx->addr = GNUNET_malloc(addrlen);
- retry_ctx->msg = GNUNET_malloc(msgbuf_size);
- retry_ctx->plugin = plugin;
- memcpy(retry_ctx->addr, addr, addrlen);
- memcpy(retry_ctx->msg, msgbuf, msgbuf_size);
- retry_ctx->msg_size = msgbuf_size;
- retry_ctx->addrlen = addrlen;
- retry_ctx->send_handle = send_handle;
- retry_ctx->cont = cont;
- retry_ctx->cont_cls = cont_cls;
- retry_ctx->priority = priority;
- retry_ctx->timeout = GNUNET_TIME_relative_to_absolute(timeout);
- memcpy(&retry_ctx->target, target, sizeof(struct GNUNET_PeerIdentity));
- retry_ctx->delay = GNUNET_TIME_UNIT_MILLISECONDS;
- retry_ctx->retry_list_entry = retry_list_entry;
- retry_list_entry->retry_ctx = retry_ctx;
- GNUNET_CONTAINER_DLL_insert(retry_list_head, retry_list_tail, retry_list_entry);
+ /* Could not increase buffer size: error, no retry */
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "setsockopt");
+ return GNUNET_SYSERR;
}
+ }
else
- {
- retry_ctx = incoming_retry_context;
- retry_ctx->delay = GNUNET_TIME_relative_multiply(retry_ctx->delay, 2);
- }
- retry_ctx->retry_task = GNUNET_SCHEDULER_add_delayed(retry_ctx->delay, &retry_send_message, retry_ctx);
-
- //GNUNET_log_strerror (GNUNET_ERROR_TYPE_DEBUG, "send");
- GNUNET_free(message);
- return ssize;
- }
-#if DEBUG_UNIX
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "UNIX transmit %u-byte message to %s (%d: %s)\n",
- (unsigned int) ssize,
- GNUNET_a2s (sb, sbs),
- (int) sent,
- (sent < 0) ? STRERROR (errno) : "ok");
-#endif
- if (cont != NULL)
- {
- if (sent == GNUNET_SYSERR)
- cont (cont_cls, target, GNUNET_SYSERR);
- else
- {
- cont (cont_cls, target, GNUNET_OK);
- }
- }
-
- if (incoming_retry_context != NULL)
- {
- GNUNET_CONTAINER_DLL_remove(retry_list_head, retry_list_tail, incoming_retry_context->retry_list_entry);
- GNUNET_free(incoming_retry_context->retry_list_entry);
- GNUNET_free(incoming_retry_context->msg);
- GNUNET_free(incoming_retry_context->addr);
- GNUNET_free(incoming_retry_context);
+ {
+ /* Buffer is bigger than message: error, no retry
+ * This should never happen!*/
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
}
+ }
- GNUNET_free (message);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "UNIX transmit %u-byte message to %s (%d: %s)\n",
+ (unsigned int) msgbuf_size,
+ GNUNET_a2s (sb, sbs),
+ (int) sent,
+ (sent < 0) ? STRERROR (errno) : "ok");
return sent;
}
+/**
+ * Closure for 'get_session_it'.
+ */
+struct GetSessionIteratorContext
+{
+ /**
+ * Location to store the session, if found.
+ */
+ struct Session *res;
+
+ /**
+ * Address information.
+ */
+ const char *address;
+
+ /**
+ * Number of bytes in 'address'
+ */
+ size_t addrlen;
+};
+
+
+/**
+ * Function called to find a session by address.
+ *
+ * @param cls the 'struct LookupCtx'
+ * @param key peer we are looking for (unused)
+ * @param value a session
+ * @return GNUNET_YES if not found (continue looking), GNUNET_NO on success
+ */
+static int
+get_session_it (void *cls,
+ const struct GNUNET_HashCode *key,
+ void *value)
+{
+ struct GetSessionIteratorContext *gsi = cls;
+ struct Session *s = value;
+
+ if ( (gsi->addrlen == s->addrlen) &&
+ (0 == memcmp (gsi->address, s->addr, s->addrlen)) )
+ {
+ gsi->res = s;
+ return GNUNET_NO;
+ }
+ return GNUNET_YES;
+}
+
+
+/**
+ * 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));
+ disconnect_session (s);
+}
+
+
+/**
+ * Creates a new outbound session the transport service will use to send data to the
+ * peer
+ *
+ * @param cls the plugin
+ * @param address the address
+ * @return the session or NULL of max connections exceeded
+ */
+static struct Session *
+unix_plugin_get_session (void *cls,
+ const struct GNUNET_HELLO_Address *address)
+{
+ struct Plugin *plugin = cls;
+ struct Session *s;
+ struct GetSessionIteratorContext gsi;
+
+ GNUNET_assert (NULL != plugin);
+ GNUNET_assert (NULL != address);
+
+ /* Check if already existing */
+ gsi.address = (const char *) address->address;
+ gsi.addrlen = address->address_length;
+ gsi.res = NULL;
+ GNUNET_CONTAINER_multihashmap_get_multiple (plugin->session_map,
+ &address->peer.hashPubKey,
+ &get_session_it, &gsi);
+ if (NULL != gsi.res)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Found existing session\n");
+ return gsi.res;
+ }
+
+ /* create a new session */
+ s = GNUNET_malloc (sizeof (struct Session) + address->address_length);
+ s->addr = &s[1];
+ s->addrlen = address->address_length;
+ s->plugin = plugin;
+ memcpy (s->addr, address->address, s->addrlen);
+ memcpy (&s->target, &address->peer, sizeof (struct GNUNET_PeerIdentity));
+
+ GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == s->timeout_task);
+ s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
+ &session_timeout,
+ s);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Creating a new session %p with timeout set to %s\n",
+ s,
+ GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
+ GNUNET_YES));
+ (void) GNUNET_CONTAINER_multihashmap_put (plugin->session_map,
+ &address->peer.hashPubKey, s,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+ GNUNET_STATISTICS_set (plugin->env->stats,
+ "# UNIX sessions active",
+ GNUNET_CONTAINER_multihashmap_size (plugin->session_map),
+ GNUNET_NO);
+ return s;
+}
+
+
/**
* Function that can be used by the transport service to transmit
- * a message using the plugin.
+ * 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 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 priority how important is the message (ignored by UNIX)
- * @param timeout when should we time out (give up) if we can not transmit?
- * @param session identifier used for this session (can be NULL)
- * @param addr the addr to send the message to, needs to be a sockaddr for us
- * @param addrlen the len of addr
- * @param force_address not used, we had better have an address to send to
- * because we are stateless!!
+ * @param session which session must be used
+ * @param msgbuf the message to transmit
+ * @param msgbuf_size number of bytes in '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...)
+ * peer disconnected...); can be NULL
* @param cont_cls closure for cont
- *
- * @return the number of bytes written (may return 0 and the message can
- * still be transmitted later!)
+ * @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,
- const struct GNUNET_PeerIdentity *target,
- const char *msgbuf,
- size_t msgbuf_size,
- unsigned int 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 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;
- ssize_t sent;
+ struct UNIXMessageWrapper *wrapper;
+ struct UNIXMessage *message;
+ int ssize;
+
+ GNUNET_assert (NULL != plugin);
+ GNUNET_assert (NULL != session);
- if (force_address == GNUNET_SYSERR)
+ if (GNUNET_OK !=
+ GNUNET_CONTAINER_multihashmap_contains_value (plugin->session_map,
+ &session->target.hashPubKey,
+ session))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ "Invalid session for peer `%s' `%s'\n",
+ GNUNET_i2s (&session->target),
+ (const char *) session->addr);
+ GNUNET_break (0);
return GNUNET_SYSERR;
- GNUNET_assert (NULL == session);
-
-#if DEBUG_UNIX
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Asked to send message to `%s'\n", (char *)addr);
-#endif
- sent = unix_real_send(cls,
- NULL,
- plugin->unix_sock.desc,
- target,
- msgbuf, msgbuf_size,
- priority, timeout, addr, addrlen,
- cont, cont_cls);
-#if DEBUG_UNIX
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Sent %d bytes to `%s'\n", sent, (char *)addr);
-#endif
- if (sent == GNUNET_SYSERR)
- return 0;
- return sent;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending %u bytes with session for peer `%s' `%s'\n",
+ msgbuf_size,
+ GNUNET_i2s (&session->target),
+ (const char *) session->addr);
+ 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);
+ reschedule_session_timeout (session);
+ wrapper = GNUNET_malloc (sizeof (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;
}
* @param fromlen the length of the address
*/
static void
-unix_demultiplexer(struct Plugin *plugin,
- struct GNUNET_PeerIdentity *sender,
- const struct GNUNET_MessageHeader *currhdr,
- const struct sockaddr_un *un,
- size_t fromlen)
+unix_demultiplexer (struct Plugin *plugin, struct GNUNET_PeerIdentity *sender,
+ const struct GNUNET_MessageHeader *currhdr,
+ const struct sockaddr_un *un, size_t fromlen)
{
- struct GNUNET_TRANSPORT_ATS_Information distance[2];
+ struct Session *s = NULL;
+ struct GNUNET_HELLO_Address * addr;
+
+ GNUNET_break (ntohl(plugin->ats_network.value) != GNUNET_ATS_NET_UNSPECIFIED);
+
+ GNUNET_assert (fromlen >= sizeof (struct sockaddr_un));
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Received message from %s\n",
+ un->sun_path);
+ GNUNET_STATISTICS_update (plugin->env->stats,
+ "# bytes received via UNIX",
+ ntohs (currhdr->size),
+ GNUNET_NO);
+
+ addr = GNUNET_HELLO_address_allocate (sender,
+ "unix",
+ un->sun_path,
+ strlen (un->sun_path) + 1);
+ s = lookup_session (plugin, sender, un);
+ if (NULL == s)
+ s = unix_plugin_get_session (plugin, addr);
+ reschedule_session_timeout (s);
- distance[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
- distance[0].value = htonl (UNIX_DIRECT_DISTANCE);
- distance[1].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
- distance[1].value = htonl (0);
+ plugin->env->receive (plugin->env->cls, sender, currhdr,
+ s, un->sun_path, strlen (un->sun_path) + 1);
- GNUNET_assert(fromlen >= sizeof(struct sockaddr_un));
+ plugin->env->update_address_metrics (plugin->env->cls,
+ sender,
+ un->sun_path,
+ strlen (un->sun_path) + 1,
+ s,
+ &plugin->ats_network, 1);
-#if DEBUG_UNIX
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Received message from %s\n", un->sun_path);
-#endif
- plugin->env->receive (plugin->env->cls, sender, currhdr,
- (const struct GNUNET_TRANSPORT_ATS_Information *) &distance, 2,
- NULL, un->sun_path, strlen(un->sun_path) + 1);
+ GNUNET_free (addr);
}
-/*
- * @param cls the plugin handle
- * @param tc the scheduling context (for rescheduling this function again)
- *
- * 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.
+/**
+ * Read from UNIX domain socket (it is ready).
*
+ * @param plugin the plugin
*/
static void
-unix_plugin_select (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+unix_plugin_select_read (struct Plugin *plugin)
{
- struct Plugin *plugin = cls;
- char buf[65536];
+ char buf[65536] GNUNET_ALIGN;
struct UNIXMessage *msg;
struct GNUNET_PeerIdentity sender;
struct sockaddr_un un;
const struct GNUNET_MessageHeader *currhdr;
uint16_t csize;
- plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
- if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
- return;
+ addrlen = sizeof (un);
+ memset (&un, 0, sizeof (un));
- addrlen = sizeof(un);
- memset(&un, 0, sizeof(un));
- GNUNET_assert (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->unix_sock.desc));
ret =
- GNUNET_NETWORK_socket_recvfrom (plugin->unix_sock.desc, buf, sizeof (buf),
- (struct sockaddr *)&un, &addrlen);
+ 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)
- {
- GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "recvfrom");
- plugin->select_task =
- GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
- GNUNET_SCHEDULER_NO_TASK,
- GNUNET_TIME_UNIT_FOREVER_REL, plugin->rs,
- NULL, &unix_plugin_select, plugin);
- return;
- }
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "recvfrom");
+ return;
+ }
else
{
#if LINUX
un.sun_path[0] = '/';
#endif
-#if DEBUG_UNIX
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Read %d bytes from socket %s\n", ret, &un.sun_path[0]);
-#endif
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Read %d bytes from socket %s\n", ret,
+ &un.sun_path[0]);
}
GNUNET_assert (AF_UNIX == (un.sun_family));
msg = (struct UNIXMessage *) buf;
csize = ntohs (msg->header.size);
- if ( (csize < sizeof (struct UNIXMessage)) ||
- (csize > ret) )
- {
- GNUNET_break_op (0);
- plugin->select_task =
- GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
- GNUNET_SCHEDULER_NO_TASK,
- GNUNET_TIME_UNIT_FOREVER_REL, plugin->rs,
- NULL, &unix_plugin_select, plugin);
- return;
- }
- msgbuf = (char *)&msg[1];
+ if ((csize < sizeof (struct UNIXMessage)) || (csize > ret))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+ msgbuf = (char *) &msg[1];
memcpy (&sender, &msg->sender, sizeof (struct GNUNET_PeerIdentity));
offset = 0;
tsize = csize - sizeof (struct UNIXMessage);
while (offset + sizeof (struct GNUNET_MessageHeader) <= tsize)
+ {
+ currhdr = (struct GNUNET_MessageHeader *) &msgbuf[offset];
+ csize = ntohs (currhdr->size);
+ if ((csize < sizeof (struct GNUNET_MessageHeader)) ||
+ (csize > tsize - offset))
{
- currhdr = (struct GNUNET_MessageHeader *)&msgbuf[offset];
- csize = ntohs (currhdr->size);
- if ( (csize < sizeof (struct GNUNET_MessageHeader)) ||
- (csize > tsize - offset) )
- {
- GNUNET_break_op (0);
- break;
- }
- unix_demultiplexer(plugin, &sender, currhdr,
- &un, sizeof(un));
- offset += csize;
+ GNUNET_break_op (0);
+ break;
}
- plugin->select_task =
- GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
- GNUNET_SCHEDULER_NO_TASK,
- GNUNET_TIME_UNIT_FOREVER_REL, plugin->rs,
- NULL, &unix_plugin_select, plugin);
+ unix_demultiplexer (plugin, &sender, currhdr, &un, sizeof (un));
+ offset += csize;
+ }
}
+
+/**
+ * Write to UNIX domain socket (it is ready).
+ *
+ * @param plugin the plugin
+ */
+static void
+unix_plugin_select_write (struct Plugin *plugin)
+{
+ int sent = 0;
+ struct UNIXMessageWrapper * msgw;
+
+ while (NULL != (msgw = plugin->msg_tail))
+ {
+ if (GNUNET_TIME_absolute_get_remaining (msgw->timeout).rel_value > 0)
+ break; /* Message is ready for sending */
+ /* Message has a timeout */
+ 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);
+ 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,
+ "# UNIX bytes discarded",
+ msgw->msgsize,
+ GNUNET_NO);
+ if (NULL != msgw->cont)
+ msgw->cont (msgw->cont_cls,
+ &msgw->session->target,
+ GNUNET_SYSERR,
+ msgw->payload,
+ 0);
+ GNUNET_free (msgw->msg);
+ GNUNET_free (msgw);
+ }
+ if (NULL == msgw)
+ return; /* Nothing to send at the moment */
+
+ sent = unix_real_send (plugin,
+ plugin->unix_sock.desc,
+ &msgw->session->target,
+ (const char *) msgw->msg,
+ msgw->msgsize,
+ msgw->priority,
+ msgw->timeout,
+ msgw->session->addr,
+ msgw->session->addrlen,
+ msgw->payload,
+ msgw->cont, msgw->cont_cls);
+
+ if (RETRY == sent)
+ {
+ GNUNET_STATISTICS_update (plugin->env->stats,
+ "# UNIX retry attempts",
+ 1, GNUNET_NO);
+ return;
+ }
+ 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);
+ 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,
+ GNUNET_OK,
+ msgw->payload,
+ msgw->msgsize);
+ GNUNET_free (msgw->msg);
+ GNUNET_free (msgw);
+}
+
+
+/**
+ * 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)
+{
+ struct Plugin *plugin = cls;
+
+ plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
+ if ((tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
+ return;
+
+ 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)
+ {
+ /* Ready to receive data */
+ GNUNET_assert (GNUNET_NETWORK_fdset_isset
+ (tc->read_ready, plugin->unix_sock.desc));
+ unix_plugin_select_read (plugin);
+ }
+ reschedule_select (plugin);
+}
+
+
/**
* Create a slew of UNIX sockets. If possible, use IPv6 and IPv4.
*
* @param cls closure for server start, should be a struct Plugin *
* @return number of sockets created or GNUNET_SYSERR on error
-*/
+ */
static int
unix_transport_server_start (void *cls)
{
struct sockaddr_un un;
size_t slen;
- memset(&un, 0, sizeof(un));
+ memset (&un, 0, sizeof (un));
un.sun_family = AF_UNIX;
slen = strlen (plugin->unix_socket_path) + 1;
if (slen >= sizeof (un.sun_path))
un.sun_len = (u_char) slen;
#endif
- serverAddr = (struct sockaddr*) &un;
+ serverAddr = (struct sockaddr *) &un;
addrlen = slen;
#if LINUX
un.sun_path[0] = '\0';
#endif
-
- plugin->unix_sock.desc = GNUNET_NETWORK_socket_create (AF_UNIX, SOCK_DGRAM, 0);
+ plugin->ats_network = plugin->env->get_address_type (plugin->env->cls, serverAddr, addrlen);
+ plugin->unix_sock.desc =
+ GNUNET_NETWORK_socket_create (AF_UNIX, SOCK_DGRAM, 0);
if (NULL == plugin->unix_sock.desc)
- {
- GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket");
- return GNUNET_SYSERR;
- }
- if (GNUNET_NETWORK_socket_bind (plugin->unix_sock.desc, serverAddr, addrlen) !=
- GNUNET_OK)
- {
- GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "bind");
- GNUNET_NETWORK_socket_close (plugin->unix_sock.desc);
- plugin->unix_sock.desc = NULL;
- return GNUNET_SYSERR;
- }
-#if DEBUG_UNIX
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "unix",
- "Bound to `%s'\n",
- &un.sun_path[0]);
-#endif
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket");
+ return GNUNET_SYSERR;
+ }
+ if (GNUNET_NETWORK_socket_bind (plugin->unix_sock.desc, serverAddr, addrlen, 0)
+ != GNUNET_OK)
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "bind");
+ GNUNET_NETWORK_socket_close (plugin->unix_sock.desc);
+ plugin->unix_sock.desc = NULL;
+ 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_set (plugin->rs,
- plugin->unix_sock.desc);
-
- plugin->select_task =
- GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
- GNUNET_SCHEDULER_NO_TASK,
- GNUNET_TIME_UNIT_FOREVER_REL, plugin->rs,
- NULL, &unix_plugin_select, plugin);
+ 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);
+
return 1;
}
*
*/
static int
-unix_check_address (void *cls,
- const void *addr,
- size_t addrlen)
+unix_check_address (void *cls, const void *addr, size_t addrlen)
{
-
-#if DEBUG_UNIX
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Informing transport service about my address `%s'\n",
- (char *)addr);
-#endif
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Informing transport service about my address `%s'\n",
+ (char *) addr);
return GNUNET_OK;
}
-/**
- * Append our port and forward the result.
- */
-static void
-append_port (void *cls, const char *hostname)
-{
- struct PrettyPrinterContext *ppc = cls;
- char *ret;
-
- if (hostname == NULL)
- {
- 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);
-}
-
-
/**
* Convert the transports address to a nice, human-readable
* format.
* @param asc_cls closure for asc
*/
static void
-unix_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)
+unix_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 PrettyPrinterContext *ppc;
- const void *sb;
- size_t sbs;
- struct sockaddr_in a4;
- struct sockaddr_in6 a6;
- const struct IPv4UdpAddress *u4;
- const struct IPv6UdpAddress *u6;
- uint16_t port;
-
- if (addrlen == sizeof (struct IPv6UdpAddress))
- {
- u6 = addr;
- memset (&a6, 0, sizeof (a6));
- a6.sin6_family = AF_INET6;
- a6.sin6_port = u6->u6_port;
- memcpy (&a6.sin6_addr,
- &u6->ipv6_addr,
- sizeof (struct in6_addr));
- port = ntohs (u6->u6_port);
- sb = &a6;
- sbs = sizeof (a6);
- }
- else if (addrlen == sizeof (struct IPv4UdpAddress))
- {
- u4 = addr;
- memset (&a4, 0, sizeof (a4));
- a4.sin_family = AF_INET;
- a4.sin_port = u4->u_port;
- a4.sin_addr.s_addr = u4->ipv4_addr;
- port = ntohs (u4->u_port);
- sb = &a4;
- sbs = sizeof (a4);
- }
+ if ((NULL != addr) && (addrlen > 0))
+ {
+ asc (asc_cls, (const char *) addr);
+ }
else
- {
- /* 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 (sb,
- sbs,
- !numeric, timeout, &append_port, ppc);
+ {
+ GNUNET_break (0);
+ asc (asc_cls, "<invalid UNIX address>");
+ }
+ asc (asc_cls, NULL);
}
+
+/**
+ * Function called to convert a string address to
+ * a binary address.
+ *
+ * @param cls closure ('struct Plugin*')
+ * @param addr string address
+ * @param addrlen length of the address (strlen(addr) + '\0')
+ * @param buf location to store the buffer
+ * If the function returns GNUNET_SYSERR, its contents are undefined.
+ * @param added length of created address
+ * @return GNUNET_OK on success, GNUNET_SYSERR on failure
+ */
+static int
+unix_string_to_address (void *cls, const char *addr, uint16_t addrlen,
+ void **buf, size_t *added)
+{
+ if ((NULL == addr) || (0 == addrlen))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ if ('\0' != addr[addrlen - 1])
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ if (strlen (addr) != addrlen - 1)
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ (*buf) = strdup (addr);
+ (*added) = strlen (addr) + 1;
+ return GNUNET_OK;
+}
+
+
/**
* Function called for a quick conversion of the binary address to
* a numeric address. Note that the caller must not free the
* @param addrlen length of the address
* @return string representing the same address
*/
-static const char*
-unix_address_to_string (void *cls,
- const void *addr,
- size_t addrlen)
+static const char *
+unix_address_to_string (void *cls, const void *addr, size_t addrlen)
{
if ((addr != NULL) && (addrlen > 0))
return (const char *) addr;
- else
- return NULL;
+ return NULL;
}
+
/**
* Notify transport service about address
*
*/
static void
address_notification (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct Plugin *plugin = cls;
+
+ plugin->address_update_task = GNUNET_SCHEDULER_NO_TASK;
+ plugin->env->notify_address (plugin->env->cls, GNUNET_YES,
+ plugin->unix_socket_path,
+ strlen (plugin->unix_socket_path) + 1,
+ "unix");
+}
+
+
+/**
+ * Increment session timeout due to activity
+ *
+ * @param s session for which the timeout should be moved
+ */
+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 (unused)
+ * @param key peer identity (unused)
+ * @param value the 'struct Session' to disconnect
+ * @return GNUNET_YES (always, continue to iterate)
+ */
+static int
+get_session_delete_it (void *cls, const struct GNUNET_HashCode * key, void *value)
+{
+ struct Session *s = value;
+
+ disconnect_session (s);
+ return GNUNET_YES;
+}
+
+
+/**
+ * Disconnect from a remote node. Clean up session if we have one for this peer
+ *
+ * @param cls closure for this call (should be handle to Plugin)
+ * @param target the peeridentity of the peer to disconnect
+ * @return GNUNET_OK on success, GNUNET_SYSERR if the operation failed
+ */
+static void
+unix_disconnect (void *cls,
+ const struct GNUNET_PeerIdentity *target)
{
struct Plugin *plugin = cls;
- plugin->env->notify_address(plugin->env->cls,
- GNUNET_YES,
- plugin->unix_socket_path,
- strlen(plugin->unix_socket_path) + 1);
+
+ GNUNET_assert (plugin != NULL);
+ GNUNET_CONTAINER_multihashmap_get_multiple (plugin->session_map,
+ &target->hashPubKey,
+ &get_session_delete_it, plugin);
}
+
/**
- * The exported method. Makes the core api available via a global and
- * returns the unix transport API.
+ * The exported method. Initializes the plugin and returns a
+ * struct with the callbacks.
+ *
+ * @param cls the plugin's execution environment
+ * @return NULL on error, plugin functions otherwise
*/
void *
libgnunet_plugin_transport_unix_init (void *cls)
struct Plugin *plugin;
int sockets_created;
+ if (NULL == env->receive)
+ {
+ /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
+ initialze the plugin or the API */
+ api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
+ api->cls = NULL;
+ api->address_pretty_printer = &unix_plugin_address_pretty_printer;
+ api->address_to_string = &unix_address_to_string;
+ api->string_to_address = &unix_string_to_address;
+ return api;
+ }
if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_number (env->cfg,
- "transport-unix",
- "PORT",
- &port))
+ GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-unix", "PORT",
+ &port))
port = UNIX_NAT_DEFAULT_PORT;
plugin = GNUNET_malloc (sizeof (struct Plugin));
plugin->port = port;
plugin->env = env;
GNUNET_asprintf (&plugin->unix_socket_path,
- "/tmp/unix-plugin-sock.%d",
- plugin->port);
-
+ "/tmp/unix-plugin-sock.%d",
+ plugin->port);
+
api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
api->cls = plugin;
+ api->get_session = &unix_plugin_get_session;
api->send = &unix_plugin_send;
api->disconnect = &unix_disconnect;
api->address_pretty_printer = &unix_plugin_address_pretty_printer;
api->address_to_string = &unix_address_to_string;
api->check_address = &unix_check_address;
+ api->string_to_address = &unix_string_to_address;
sockets_created = unix_transport_server_start (plugin);
- if (sockets_created == 0)
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Failed to open UNIX sockets\n"));
-
- GNUNET_SCHEDULER_add_now(address_notification, plugin);
+ if (0 == sockets_created)
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("Failed to open UNIX listen socket\n"));
+ plugin->session_map = GNUNET_CONTAINER_multihashmap_create (10, GNUNET_NO);
+ plugin->address_update_task = GNUNET_SCHEDULER_add_now (&address_notification, plugin);
return api;
}
+
+/**
+ * Shutdown the plugin.
+ *
+ * @param cls the plugin API returned from the initialization function
+ * @return NULL (always)
+ */
void *
libgnunet_plugin_transport_unix_done (void *cls)
{
struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
struct Plugin *plugin = api->cls;
+ struct UNIXMessageWrapper * msgw;
- unix_transport_server_stop (plugin);
+ if (NULL == plugin)
+ {
+ GNUNET_free (api);
+ return NULL;
+ }
+ plugin->env->notify_address (plugin->env->cls, GNUNET_NO,
+ plugin->unix_socket_path,
+ strlen (plugin->unix_socket_path) + 1,
+ "unix");
+ while (NULL != (msgw = plugin->msg_head))
+ {
+ GNUNET_CONTAINER_DLL_remove (plugin->msg_head, plugin->msg_tail, msgw);
+ if (msgw->cont != NULL)
+ msgw->cont (msgw->cont_cls, &msgw->session->target, GNUNET_SYSERR,
+ msgw->payload, 0);
+ GNUNET_free (msgw->msg);
+ GNUNET_free (msgw);
+ }
- GNUNET_NETWORK_fdset_destroy (plugin->rs);
+ if (GNUNET_SCHEDULER_NO_TASK != plugin->select_task)
+ {
+ GNUNET_SCHEDULER_cancel (plugin->select_task);
+ plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ if (GNUNET_SCHEDULER_NO_TASK != plugin->address_update_task)
+ {
+ GNUNET_SCHEDULER_cancel (plugin->address_update_task);
+ plugin->address_update_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ if (NULL != plugin->unix_sock.desc)
+ {
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_NETWORK_socket_close (plugin->unix_sock.desc));
+ plugin->unix_sock.desc = NULL;
+ plugin->with_ws = GNUNET_NO;
+ }
+ GNUNET_CONTAINER_multihashmap_iterate (plugin->session_map,
+ &get_session_delete_it, plugin);
+ GNUNET_CONTAINER_multihashmap_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_free (plugin->unix_socket_path);
GNUNET_free (plugin);
GNUNET_free (api);
projects / oweals / gnunet.git / blobdiff