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[GNUnet-SVN] r15971 - gnunet/src/transport
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From: |
gnunet |
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Subject: |
[GNUnet-SVN] r15971 - gnunet/src/transport |
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Date: |
Thu, 14 Jul 2011 19:45:45 +0200 |
Author: grothoff
Date: 2011-07-14 19:45:45 +0200 (Thu, 14 Jul 2011)
New Revision: 15971
Added:
gnunet/src/transport/plugin_transport_udp.c
Removed:
gnunet/src/transport/plugin_transport_udp.c
gnunet/src/transport/plugin_transport_udp_new.c
Modified:
gnunet/src/transport/Makefile.am
Log:
renaming
Modified: gnunet/src/transport/Makefile.am
===================================================================
--- gnunet/src/transport/Makefile.am 2011-07-14 17:45:16 UTC (rev 15970)
+++ gnunet/src/transport/Makefile.am 2011-07-14 17:45:45 UTC (rev 15971)
@@ -187,7 +187,7 @@
$(GN_PLUGIN_LDFLAGS)
libgnunet_plugin_transport_udp_la_SOURCES = \
- plugin_transport_udp_new.c
+ plugin_transport_udp.c
libgnunet_plugin_transport_udp_la_LIBADD = \
$(top_builddir)/src/hello/libgnunethello.la \
$(top_builddir)/src/fragmentation/libgnunetfragmentation.la \
Deleted: gnunet/src/transport/plugin_transport_udp.c
===================================================================
--- gnunet/src/transport/plugin_transport_udp.c 2011-07-14 17:45:16 UTC (rev
15970)
+++ gnunet/src/transport/plugin_transport_udp.c 2011-07-14 17:45:45 UTC (rev
15971)
@@ -1,1728 +0,0 @@
-/*
- This file is part of GNUnet
- (C) 2010 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
- by the Free Software Foundation; either version 3, or (at your
- option) any later version.
-
- GNUnet is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
-*/
-
-/**
- * @file transport/plugin_transport_udp.c
- * @brief Implementation of the UDP NAT punching
- * transport service
- * @author Christian Grothoff
- * @author Nathan Evans
- *
- * The idea with this transport is to connect gnunet peers to each other
- * when ONE is behind a NAT. This is based on pwnat (http://samy.pl/pwnat)
- * created by Samy Kamkar. When configured with the PWNAT options, this
- * transport will start a server daemon which sends dummy ICMP and UDP
- * messages out to a predefined address (typically 1.2.3.4).
- *
- * When a non-NAT'd peer (the client) learns of the NAT'd peer (the server)
- * address, it will send ICMP RESPONSES to the NAT'd peers external address.
- * The NAT box should forward these faked responses to the server, which
- * can then connect directly to the non-NAT'd peer.
- */
-
-#include "platform.h"
-#include "gnunet_hello_lib.h"
-#include "gnunet_connection_lib.h"
-#include "gnunet_container_lib.h"
-#include "gnunet_nat_lib.h"
-#include "gnunet_os_lib.h"
-#include "gnunet_peerinfo_service.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_UDP GNUNET_NO
-
-#define MAX_PROBES 20
-
-/*
- * Transport cost to peer, always 1 for UDP (direct connection)
- */
-#define UDP_DIRECT_DISTANCE 1
-
-#define DEFAULT_NAT_PORT 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
- */
-#define UDP_NAT_DEFAULT_PORT 22086
-
-/**
- * UDP Message-Packet header.
- */
-struct UDPMessage
-{
- /**
- * Message header.
- */
- struct GNUNET_MessageHeader header;
-
- /**
- * What is the identity of the sender (GNUNET_hash of public key)
- */
- struct GNUNET_PeerIdentity sender;
-
-};
-
-/**
- * Network format for IPv4 addresses.
- */
-struct IPv4UdpAddress
-{
- /**
- * IPv4 address, in network byte order.
- */
- uint32_t ipv4_addr GNUNET_PACKED;
-
- /**
- * Port number, in network byte order.
- */
- uint16_t u4_port GNUNET_PACKED;
-};
-
-
-/**
- * Network format for IPv6 addresses.
- */
-struct IPv6UdpAddress
-{
- /**
- * IPv6 address.
- */
- struct in6_addr ipv6_addr GNUNET_PACKED;
-
- /**
- * Port number, in network byte order.
- */
- uint16_t u6_port GNUNET_PACKED;
-};
-
-/* Forward definition */
-struct Plugin;
-
-struct PrettyPrinterContext
-{
- /**
- * Function to call with the result.
- */
- GNUNET_TRANSPORT_AddressStringCallback asc;
-
- /**
- * Clsoure for 'asc'.
- */
- void *asc_cls;
-
- /**
- * The address
- */
- void * addr;
-
- /**
- * address length
- */
- size_t addr_len;
-
- /**
- * Port to add after the IP address.
- */
- uint16_t port;
-};
-
-
-struct MessageQueue
-{
- /**
- * Linked List
- */
- struct MessageQueue *next;
-
- /**
- * Session this message belongs to
- */
- struct PeerSession *session;
-
- /**
- * Actual message to be sent
- */
- char *msgbuf;
-
- /**
- * Size of message buffer to be sent
- */
- size_t msgbuf_size;
-
- /**
- * When to discard this message
- */
- struct GNUNET_TIME_Absolute timeout;
-
- /**
- * Continuation to call when this message goes out
- */
- GNUNET_TRANSPORT_TransmitContinuation cont;
-
- /**
- * closure for continuation
- */
- void *cont_cls;
-
-};
-
-/**
- * UDP NAT Probe message definition
- */
-struct UDP_NAT_ProbeMessage
-{
- /**
- * Message header
- */
- struct GNUNET_MessageHeader header;
-
-};
-
-/**
- * UDP NAT Probe message reply definition
- */
-struct UDP_NAT_ProbeMessageReply
-{
- /**
- * Message header
- */
- struct GNUNET_MessageHeader header;
-
-};
-
-
-/**
- * UDP NAT Probe message confirm definition
- */
-struct UDP_NAT_ProbeMessageConfirmation
-{
- /**
- * Message header
- */
- struct GNUNET_MessageHeader header;
-
-};
-
-
-/**
- * UDP NAT "Session"
- */
-struct PeerSession
-{
-
- /**
- * Stored in a linked list.
- */
- struct PeerSession *next;
-
- /**
- * Pointer to the global plugin struct.
- */
- struct Plugin *plugin;
-
- /**
- * To whom are we talking to (set to our identity
- * if we are still waiting for the welcome message)
- */
- struct GNUNET_PeerIdentity target;
-
- /**
- * Address of the other peer (either based on our 'connect'
- * call or on our 'accept' call).
- */
- void *connect_addr;
-
- /**
- * Length of connect_addr.
- */
- size_t connect_alen;
-
- /**
- * Are we still expecting the welcome message? (GNUNET_YES/GNUNET_NO)
- */
- int expecting_welcome;
-
- /**
- * From which socket do we need to send to this peer?
- */
- struct GNUNET_NETWORK_Handle *sock;
-
- /*
- * Queue of messages for this peer, in the case that
- * we have to await a connection...
- */
- struct MessageQueue *messages;
-
-};
-
-struct UDP_NAT_Probes
-{
-
- /**
- * Linked list
- */
- struct UDP_NAT_Probes *next;
-
- /**
- * Timeout for this set of probes
- */
- struct GNUNET_TIME_Absolute timeout;
-
- /**
- * Count of how many probes we've attempted
- */
- int count;
-
- /**
- * The plugin this probe belongs to
- */
- struct Plugin *plugin;
-
- /**
- * The task used to send these probes
- */
- GNUNET_SCHEDULER_TaskIdentifier task;
-
- /**
- * Network address (always ipv4!)
- */
- struct IPv4UdpAddress addr;
-
-};
-
-
-/**
- * Information we keep for each of our listen sockets.
- */
-struct UDP_Sock_Info
-{
- /**
- * The network handle
- */
- struct GNUNET_NETWORK_Handle *desc;
-
- /**
- * The port we bound to
- */
- uint16_t port;
-};
-
-
-/**
- * Encapsulation of all of the state of the plugin.
- */
-struct Plugin
-{
- /**
- * Our environment.
- */
- struct GNUNET_TRANSPORT_PluginEnvironment *env;
-
- /*
- * Session of peers with whom we are currently connected
- */
- struct PeerSession *sessions;
-
- /**
- * ID of select task
- */
- GNUNET_SCHEDULER_TaskIdentifier select_task;
-
- /**
- * Port to listen on.
- */
- uint16_t port;
-
- /**
- * Address we were told to bind to exclusively (IPv4).
- */
- char *bind_address;
-
- /**
- * Address we were told to bind to exclusively (IPv6).
- */
- char *bind6_address;
-
- /**
- * Handle to NAT traversal support.
- */
- struct GNUNET_NAT_Handle *nat;
-
- /**
- * FD Read set
- */
- struct GNUNET_NETWORK_FDSet *rs;
-
- /**
- * Probes in flight
- */
- struct UDP_NAT_Probes *probes;
-
- /**
- * socket that we transmit all IPv4 data with
- */
- struct UDP_Sock_Info udp_sockv4;
-
- /**
- * socket that we transmit all IPv6 data with
- */
- struct UDP_Sock_Info udp_sockv6;
-
-};
-
-
-/**
- * Forward declaration.
- */
-static void
-udp_probe_continuation (void *cls, const struct GNUNET_PeerIdentity *target,
int result);
-
-
-/**
- * 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
-udp_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
-{
- /** TODO: Implement! */
- return;
-}
-
-
-struct PeerSession *
-find_session (struct Plugin *plugin,
- const struct GNUNET_PeerIdentity *peer)
-{
- 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;
-}
-
-
-/**
- * Actually send out the message, assume we've got the address and
- * send_handle squared away!
- *
- * @param cls closure
- * @param send_handle which handle to send message on
- * @param target who should receive this message (ignored by UDP)
- * @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 UDP)
- * @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 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
- */
-static ssize_t
-udp_real_send (void *cls,
- 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)
-{
- struct Plugin *plugin = cls;
- struct UDPMessage *message;
- int ssize;
- ssize_t sent;
- struct sockaddr_in a4;
- struct sockaddr_in6 a6;
- const struct IPv4UdpAddress *t4;
- const struct IPv6UdpAddress *t6;
- const void *sb;
- size_t sbs;
-
- if (send_handle == NULL)
- {
- /* 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_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "udp_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 UDPMessage) + msgbuf_size);
- ssize = sizeof (struct UDPMessage) + 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);
-
- if (addrlen == sizeof (struct IPv6UdpAddress))
- {
- t6 = addr;
- memset (&a6, 0, sizeof (a6));
-#if HAVE_SOCKADDR_IN_SIN_LEN
- a6.sin6_len = sizeof (a6);
-#endif
- a6.sin6_family = AF_INET6;
- a6.sin6_port = t6->u6_port;
- memcpy (&a6.sin6_addr,
- &t6->ipv6_addr,
- sizeof (struct in6_addr));
- sb = &a6;
- sbs = sizeof (a6);
- }
- else if (addrlen == sizeof (struct IPv4UdpAddress))
- {
- t4 = addr;
- memset (&a4, 0, sizeof (a4));
-#if HAVE_SOCKADDR_IN_SIN_LEN
- a4.sin_len = sizeof (a4);
-#endif
- a4.sin_family = AF_INET;
- a4.sin_port = t4->u4_port;
- a4.sin_addr.s_addr = t4->ipv4_addr;
- sb = &a4;
- sbs = sizeof (a4);
- }
- else
- {
- GNUNET_break_op (0);
- GNUNET_free (message);
- return -1;
- }
-
- /* Actually send the message */
- sent =
- GNUNET_NETWORK_socket_sendto (send_handle, message, ssize,
- sb,
- sbs);
- if (GNUNET_SYSERR == sent)
- GNUNET_log_strerror(GNUNET_ERROR_TYPE_DEBUG, "sendto");
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "UDP transmit %u-byte message to %s (%d: %s)\n",
- (unsigned int) ssize,
- GNUNET_a2s (sb, sbs),
- (int) sent,
- (sent < 0) ? STRERROR (errno) : "ok");
- if (cont != NULL)
- {
- if (sent == GNUNET_SYSERR)
- cont (cont_cls, target, GNUNET_SYSERR);
- else
- {
- cont (cont_cls, target, GNUNET_OK);
- }
- }
-
- GNUNET_free (message);
- return sent;
-}
-
-
-/**
- * Function that can be used by the transport service to transmit
- * a message using the plugin.
- *
- * @param cls closure
- * @param target who should receive this message (ignored by UDP)
- * @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 UDP)
- * @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 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 (may return 0 and the message can
- * still be transmitted later!)
- */
-static ssize_t
-udp_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 Plugin *plugin = cls;
- ssize_t sent;
- struct MessageQueue *temp_message;
- struct PeerSession *peer_session;
- int other_peer_natd;
- const struct IPv4UdpAddress *t4;
- struct sockaddr_in sin4;
-
- if (force_address == GNUNET_SYSERR)
- return GNUNET_SYSERR;
- GNUNET_assert (NULL == session);
-
- other_peer_natd = GNUNET_NO;
- if (addrlen == sizeof(struct IPv4UdpAddress))
- {
- t4 = addr;
- if (ntohs(t4->u4_port) == 0)
- other_peer_natd = GNUNET_YES;
- }
- else if (addrlen != sizeof(struct IPv6UdpAddress))
- {
- GNUNET_break_op(0);
- return -1; /* Must have an address to send to */
- }
-
- sent = 0;
- if ( (other_peer_natd == GNUNET_YES) &&
- (addrlen == sizeof(struct IPv4UdpAddress)) )
- {
- peer_session = find_session(plugin, target);
- if (peer_session == NULL) /* We have a new peer to add */
- {
- /*
- * The first time, we can assume we have no knowledge of a
- * working port for this peer, call the ICMP/UDP message sender
- * and wait...
- */
- peer_session = GNUNET_malloc(sizeof(struct PeerSession));
- peer_session->connect_addr = GNUNET_malloc(addrlen);
- memcpy(peer_session->connect_addr, addr, addrlen);
- peer_session->connect_alen = addrlen;
- peer_session->plugin = plugin;
- peer_session->sock = NULL;
- memcpy(&peer_session->target, target, sizeof(struct
GNUNET_PeerIdentity));
- peer_session->expecting_welcome = GNUNET_YES;
-
- peer_session->next = plugin->sessions;
- plugin->sessions = peer_session;
-
- peer_session->messages = GNUNET_malloc(sizeof(struct MessageQueue));
- peer_session->messages->msgbuf = GNUNET_malloc(msgbuf_size);
- memcpy(peer_session->messages->msgbuf, msgbuf, msgbuf_size);
- peer_session->messages->msgbuf_size = msgbuf_size;
- peer_session->messages->timeout =
GNUNET_TIME_relative_to_absolute(timeout);
- peer_session->messages->cont = cont;
- peer_session->messages->cont_cls = cont_cls;
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("Other peer is NAT'd, set up peer session for peer
%s\n"), GNUNET_i2s(target));
-#endif
- memset (&sin4, 0, sizeof (sin4));
- sin4.sin_family = AF_INET;
-#if HAVE_SOCKADDR_IN_SIN_LEN
- sin4.sin_len = sizeof (sin4);
-#endif
- sin4.sin_port = t4->u4_port;
- sin4.sin_addr.s_addr = t4->ipv4_addr;
- GNUNET_NAT_run_client (plugin->nat, &sin4);
- }
- else
- {
- if (peer_session->expecting_welcome == GNUNET_NO) /* We are
"connected" */
- {
- sent = udp_real_send(cls,
- peer_session->sock,
- target,
- msgbuf, msgbuf_size,
- priority, timeout,
- peer_session->connect_addr,
peer_session->connect_alen,
- cont, cont_cls);
- }
- else /* Haven't gotten a response from this peer, queue message */
- {
- temp_message = GNUNET_malloc(sizeof(struct MessageQueue));
- temp_message->msgbuf = GNUNET_malloc(msgbuf_size);
- memcpy(temp_message->msgbuf, msgbuf, msgbuf_size);
- temp_message->msgbuf_size = msgbuf_size;
- temp_message->timeout =
GNUNET_TIME_relative_to_absolute(timeout);
- temp_message->cont = cont;
- temp_message->cont_cls = cont_cls;
- temp_message->next = peer_session->messages;
- peer_session->messages = temp_message;
- }
- }
- }
- else if (other_peer_natd == GNUNET_NO) /* Other peer not behind a NAT, so we
can just send the message as is */
- {
- sent = udp_real_send(cls,
- (addrlen == sizeof (struct IPv4UdpAddress)) ?
plugin->udp_sockv4.desc : plugin->udp_sockv6.desc,
- target,
- msgbuf, msgbuf_size,
- priority, timeout, addr, addrlen,
- cont, cont_cls);
- }
- else /* Other peer is NAT'd, but we don't want to play with them (or can't!)
*/
- {
- return GNUNET_SYSERR;
- }
-
- /* When GNUNET_SYSERR is returned from udp_real_send, we will still call
- * the callback so must not return GNUNET_SYSERR!
- * If we did, then transport context would get freed twice. */
- if (sent == GNUNET_SYSERR)
- return 0;
- return sent;
-}
-
-
-/**
- * Send UDP probe messages or UDP keepalive messages, depending on the
- * state of the connection.
- *
- * @param cls closure for this call (should be the main Plugin)
- * @param tc task context for running this
- */
-static void
-send_udp_probe_message (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct UDP_NAT_Probes *probe = cls;
- struct UDP_NAT_ProbeMessage message;
- struct Plugin *plugin = probe->plugin;
-
- memset (&message, 0, sizeof (message));
- message.header.size = htons(sizeof(struct UDP_NAT_ProbeMessage));
- message.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_NAT_PROBE);
- /* If they gave us a port, use that. If not, try our port. */
- if (ntohs(probe->addr.u4_port) == 0)
- probe->addr.u4_port = htons(plugin->port);
-
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("Sending a probe to port %d\n"),
ntohs(probe->addr.u4_port));
-#endif
- probe->count++;
- udp_real_send(plugin,
- plugin->udp_sockv4.desc,
- NULL,
- (char *)&message, ntohs(message.header.size), 0,
- GNUNET_TIME_relative_get_unit(),
- &probe->addr, sizeof(struct IPv4UdpAddress),
- &udp_probe_continuation, probe);
-}
-
-
-/**
- * Continuation for probe sends. If the last probe was sent
- * "successfully", schedule sending of another one. If not,
- * FIXME...
- */
-static void
-udp_probe_continuation (void *cls,
- const struct GNUNET_PeerIdentity *target,
- int result)
-{
- struct UDP_NAT_Probes *probe = cls;
- /*struct Plugin *plugin = probe->plugin;*/
-
- if ((result == GNUNET_OK) && (probe->count < MAX_PROBES))
- {
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("Scheduling next probe for 10000 milliseconds\n"));
-#endif
- probe->task =
GNUNET_SCHEDULER_add_delayed(GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS,
10),
- &send_udp_probe_message,
probe);
- }
- else /* Destroy the probe context. */
- {
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("Sending probe didn't go well...\n"));
-#endif
- }
-}
-
-
-/**
- * FIXME.
- */
-static void
-udp_plugin_reversal_callback (void *cls,
- const struct sockaddr *addr,
- socklen_t addrlen)
-{
- struct Plugin *plugin = cls;
- struct UDP_NAT_Probes *temp_probe;
- const struct sockaddr_in *inaddr;
-
- if (sizeof (struct sockaddr_in) != addrlen)
- {
- GNUNET_break (0);
- return;
- }
- inaddr = (const struct sockaddr_in *) addr;
- temp_probe = GNUNET_malloc(sizeof(struct UDP_NAT_Probes));
- temp_probe->addr.ipv4_addr = inaddr->sin_addr.s_addr;
- temp_probe->addr.u4_port = inaddr->sin_port;
- temp_probe->next = plugin->probes;
- temp_probe->plugin = plugin;
- temp_probe->task =
GNUNET_SCHEDULER_add_delayed(GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS,
500),
- &send_udp_probe_message,
- temp_probe);
- plugin->probes = temp_probe;
-}
-
-
-/**
- * Demultiplexer for UDP NAT messages
- *
- * @param plugin the main plugin for this transport
- * @param sender from which peer the message was received
- * @param currhdr pointer to the header of the message
- * @param sender_addr the address from which the message was received
- * @param fromlen the length of the address
- * @param sockinfo which socket did we receive the message on
- */
-static void
-udp_demultiplexer(struct Plugin *plugin,
- struct GNUNET_PeerIdentity *sender,
- const struct GNUNET_MessageHeader *currhdr,
- const void *sender_addr,
- size_t fromlen, struct UDP_Sock_Info *sockinfo)
-{
- struct UDP_NAT_ProbeMessageReply *outgoing_probe_reply;
- struct PeerSession *peer_session;
- struct MessageQueue *pending_message;
- struct MessageQueue *pending_message_temp;
- uint16_t incoming_port;
- struct GNUNET_TRANSPORT_ATS_Information distance[2];
- if (memcmp(sender, plugin->env->my_identity, sizeof(struct
GNUNET_PeerIdentity)) == 0)
- {
-#if DEBUG_UDP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "udp",
- _("Received a message from myself, dropping!!!\n"));
-#endif
- return;
- }
-
- incoming_port = 0;
- GNUNET_assert(sender_addr != NULL); /* Can recvfrom have a NULL address? */
- if (fromlen == sizeof(struct IPv4UdpAddress))
- {
- incoming_port = ntohs(((struct IPv4UdpAddress *)sender_addr)->u4_port);
- }
- else if (fromlen == sizeof(struct IPv6UdpAddress))
- {
- incoming_port = ntohs(((struct IPv6UdpAddress *)sender_addr)->u6_port);
- }
-
- switch (ntohs(currhdr->type))
- {
- case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_NAT_PROBE:
- /* Send probe reply */
- outgoing_probe_reply = GNUNET_malloc(sizeof(struct
UDP_NAT_ProbeMessageReply));
- outgoing_probe_reply->header.size = htons(sizeof(struct
UDP_NAT_ProbeMessageReply));
- outgoing_probe_reply->header.type =
htons(GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_NAT_PROBE_REPLY);
-
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("Received a probe on listen port %d, sent_from port %d\n"),
- sockinfo->port, incoming_port);
-#endif
-
- udp_real_send(plugin, sockinfo->desc, NULL,
- (char *)outgoing_probe_reply,
- ntohs(outgoing_probe_reply->header.size), 0,
- GNUNET_TIME_relative_get_unit(),
- sender_addr, fromlen,
- NULL, NULL);
-
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("Sent PROBE REPLY to port %d on outgoing port %d\n"),
- incoming_port, sockinfo->port);
-#endif
- GNUNET_free(outgoing_probe_reply);
- break;
- case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_NAT_PROBE_REPLY:
- /* Check for existing probe, check ports returned, send confirmation if
all is well */
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("Received PROBE REPLY from port %d on incoming port
%d\n"), incoming_port, sockinfo->port);
-#endif
- if (fromlen == sizeof(struct IPv4UdpAddress))
- {
- /* FIXME! */
-#if 0
- struct UDP_NAT_ProbeMessageConfirmation *outgoing_probe_confirmation;
- struct UDP_NAT_Probes *outgoing_probe;
- outgoing_probe = find_probe(plugin, &addr_buf[0]);
- if (outgoing_probe != NULL)
- {
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("Sending confirmation that we were reached!\n"));
-#endif
- outgoing_probe_confirmation = GNUNET_malloc(sizeof(struct
UDP_NAT_ProbeMessageConfirmation));
- outgoing_probe_confirmation->header.size = htons(sizeof(struct
UDP_NAT_ProbeMessageConfirmation));
- outgoing_probe_confirmation->header.type =
htons(GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_NAT_PROBE_CONFIRM);
- udp_real_send(plugin, sockinfo->desc, NULL,
- (char *)outgoing_probe_confirmation,
- ntohs(outgoing_probe_confirmation->header.size), 0,
- GNUNET_TIME_relative_get_unit(),
- sender_addr, fromlen, NULL, NULL);
-
- if (outgoing_probe->task != GNUNET_SCHEDULER_NO_TASK)
- {
- GNUNET_SCHEDULER_cancel(outgoing_probe->task);
- outgoing_probe->task = GNUNET_SCHEDULER_NO_TASK;
- /* Schedule task to timeout and remove probe if confirmation
not received */
- }
- GNUNET_free(outgoing_probe_confirmation);
- }
- else
- {
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("Received a probe reply, but have no record of a
sent probe!\n"));
-#endif
- }
-#endif
- }
- else
- {
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("Received a probe reply, but sender address size is
WRONG (should be %d, is %d)!\n"), sizeof(struct IPv4UdpAddress), fromlen);
-#endif
- }
- break;
- case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_NAT_PROBE_CONFIRM:
- peer_session = find_session(plugin, sender);
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("Looking up peer session for peer %s\n"),
GNUNET_i2s(sender));
-#endif
- if (peer_session == NULL) /* Shouldn't this NOT happen? */
- {
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("Peer not in list, adding (THIS MAY BE A MISTAKE)
%s\n"), GNUNET_i2s(sender));
-#endif
- peer_session = GNUNET_malloc(sizeof(struct PeerSession));
- peer_session->connect_addr = GNUNET_malloc(fromlen);
- memcpy(peer_session->connect_addr, sender_addr, fromlen);
- peer_session->connect_alen = fromlen;
- peer_session->plugin = plugin;
- peer_session->sock = sockinfo->desc;
- memcpy(&peer_session->target, sender, sizeof(struct
GNUNET_PeerIdentity));
- peer_session->expecting_welcome = GNUNET_NO;
-
- peer_session->next = plugin->sessions;
- plugin->sessions = peer_session;
-
- peer_session->messages = NULL;
- }
- else if (peer_session->expecting_welcome == GNUNET_YES)
- {
- peer_session->expecting_welcome = GNUNET_NO;
- peer_session->sock = sockinfo->desc;
- if (peer_session->connect_alen == sizeof(struct IPv4UdpAddress))
- {
- ((struct IPv4UdpAddress *)peer_session->connect_addr)->u4_port =
htons(incoming_port);
- }
- else if (peer_session->connect_alen == sizeof(struct IPv4UdpAddress))
- {
- ((struct IPv6UdpAddress *)peer_session->connect_addr)->u6_port =
htons(incoming_port);
- }
-
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("Received a probe confirmation, will send to peer
on port %d\n"), incoming_port);
-#endif
- if (peer_session->messages != NULL)
- {
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("Received a probe confirmation, sending queued
messages.\n"));
-#endif
- pending_message = peer_session->messages;
- int count = 0;
- while (pending_message != NULL)
- {
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("sending queued message %d\n"), count);
-#endif
- udp_real_send(plugin,
- peer_session->sock,
- &peer_session->target,
- pending_message->msgbuf,
- pending_message->msgbuf_size, 0,
- GNUNET_TIME_relative_get_unit(),
- peer_session->connect_addr,
- peer_session->connect_alen,
- pending_message->cont,
- pending_message->cont_cls);
-
- pending_message_temp = pending_message;
- pending_message = pending_message->next;
- GNUNET_free(pending_message_temp->msgbuf);
- GNUNET_free(pending_message_temp);
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("finished sending queued message %d\n"),
count);
-#endif
- count++;
- }
- }
-
- }
- else
- {
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _("Received probe confirmation for already confirmed
peer!\n"));
-#endif
- }
- /* Received confirmation, add peer with address/port specified */
- break;
- case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_NAT_PROBE_KEEPALIVE:
- /* Once we've sent NAT_PROBE_CONFIRM change to sending keepalives */
- /* If we receive these just ignore! */
- break;
- default:
-
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Sending message type %d to transport!\n",
- ntohs(currhdr->type));
-#endif
-
- distance[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
- distance[0].value = htonl (UDP_DIRECT_DISTANCE);
- distance[1].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
- distance[1].value = htonl (0);
-
- plugin->env->receive (plugin->env->cls, sender, currhdr,
- (const struct GNUNET_TRANSPORT_ATS_Information *)
&distance, 2,
- NULL, sender_addr, fromlen);
- }
-
-}
-
-
-/*
- * 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
-udp_plugin_select (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct Plugin *plugin = cls;
- char buf[65536];
- struct UDPMessage *msg;
- struct GNUNET_PeerIdentity sender;
- socklen_t fromlen;
- char addr[32];
- ssize_t ret;
- int offset;
- int tsize;
- char *msgbuf;
- const struct GNUNET_MessageHeader *currhdr;
- struct IPv4UdpAddress t4;
- struct IPv6UdpAddress t6;
- const struct sockaddr_in *s4;
- const struct sockaddr_in6 *s6;
- const void *ca;
- size_t calen;
- struct UDP_Sock_Info *udp_sock;
- uint16_t csize;
-
- plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
- if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
- return;
- udp_sock = NULL;
- if (GNUNET_NETWORK_fdset_isset (tc->read_ready,
- plugin->udp_sockv4.desc))
- udp_sock = &plugin->udp_sockv4;
- else if (GNUNET_NETWORK_fdset_isset (tc->read_ready,
- plugin->udp_sockv6.desc))
- udp_sock = &plugin->udp_sockv6;
- if (NULL == udp_sock)
- {
- GNUNET_break (0);
- return;
- }
- fromlen = sizeof (addr);
- memset (&addr, 0, sizeof(addr));
- ret =
- GNUNET_NETWORK_socket_recvfrom (udp_sock->desc, buf, sizeof (buf),
- (struct sockaddr *)&addr, &fromlen);
-
- if (AF_INET == ((struct sockaddr *)addr)->sa_family)
- {
- s4 = (const struct sockaddr_in*) &addr;
- t4.u4_port = s4->sin_port;
- t4.ipv4_addr = s4->sin_addr.s_addr;
- ca = &t4;
- calen = sizeof (t4);
- }
- else if (AF_INET6 == ((struct sockaddr *)addr)->sa_family)
- {
- s6 = (const struct sockaddr_in6*) &addr;
- t6.u6_port = s6->sin6_port;
- memcpy (&t6.ipv6_addr,
- &s6->sin6_addr,
- sizeof (struct in6_addr));
- ca = &t6;
- calen = sizeof (t6);
- }
- else
- {
- GNUNET_break (0);
- ca = NULL;
- calen = 0;
- }
- if (ret < sizeof (struct UDPMessage))
- {
- 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, &udp_plugin_select, plugin);
- return;
- }
- msg = (struct UDPMessage *) buf;
- csize = ntohs (msg->header.size);
- if ( (csize < sizeof (struct UDPMessage)) ||
- (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, &udp_plugin_select, plugin);
- return;
- }
- msgbuf = (char *)&msg[1];
- memcpy (&sender, &msg->sender, sizeof (struct GNUNET_PeerIdentity));
- offset = 0;
- tsize = csize - sizeof (struct UDPMessage);
- 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) )
- {
- GNUNET_break_op (0);
- break;
- }
- udp_demultiplexer(plugin, &sender, currhdr,
- ca, calen, udp_sock);
- offset += csize;
- }
- plugin->select_task =
- GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
- GNUNET_SCHEDULER_NO_TASK,
- GNUNET_TIME_UNIT_FOREVER_REL, plugin->rs,
- NULL, &udp_plugin_select, plugin);
-
-}
-
-
-/**
- * Check if the given port is plausible (must be either
- * our listen port or our advertised port). If it is
- * neither, we return GNUNET_SYSERR.
- *
- * @param plugin global variables
- * @param in_port port number to check
- * @return GNUNET_OK if port is either open_port or adv_port
- */
-static int
-check_port (struct Plugin *plugin, uint16_t in_port)
-{
- if (in_port == 0)
- return GNUNET_OK;
- if (in_port == plugin->port)
- return GNUNET_OK;
- return GNUNET_SYSERR;
-}
-
-
-/**
- * Function that will be called to check if a binary address for this
- * plugin is well-formed and corresponds to an address for THIS peer
- * (as per our configuration). Naturally, if absolutely necessary,
- * plugins can be a bit conservative in their answer, but in general
- * plugins should make sure that the address does not redirect
- * traffic to a 3rd party that might try to man-in-the-middle our
- * traffic.
- *
- * @param cls closure, should be our handle to the Plugin
- * @param addr pointer to the address
- * @param addrlen length of addr
- * @return GNUNET_OK if this is a plausible address for this peer
- * and transport, GNUNET_SYSERR if not
- *
- */
-static int
-udp_plugin_check_address (void *cls,
- const void *addr,
- size_t addrlen)
-{
- struct Plugin *plugin = cls;
- struct IPv4UdpAddress *v4;
- struct IPv6UdpAddress *v6;
-
- if ((addrlen != sizeof (struct IPv4UdpAddress)) &&
- (addrlen != sizeof (struct IPv6UdpAddress)))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if (addrlen == sizeof (struct IPv4UdpAddress))
- {
- v4 = (struct IPv4UdpAddress *) addr;
- if (GNUNET_OK !=
- check_port (plugin, ntohs (v4->u4_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 IPv6UdpAddress *) addr;
- if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if (GNUNET_OK !=
- check_port (plugin, ntohs (v6->u6_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;
-}
-
-
-/**
- * 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
- * to override the address again.
- *
- * @param cls closure
- * @param addr binary address
- * @param addrlen length of the address
- * @return string representing the same address
- */
-static const char*
-udp_address_to_string (void *cls,
- const void *addr,
- size_t addrlen)
-{
- static char rbuf[INET6_ADDRSTRLEN + 10];
- char buf[INET6_ADDRSTRLEN];
- const void *sb;
- struct in_addr a4;
- struct in6_addr a6;
- const struct IPv4UdpAddress *t4;
- const struct IPv6UdpAddress *t6;
- int af;
- uint16_t port;
-
- if (addrlen == sizeof (struct IPv6UdpAddress))
- {
- t6 = addr;
- af = AF_INET6;
- port = ntohs (t6->u6_port);
- memcpy (&a6, &t6->ipv6_addr, sizeof (a6));
- sb = &a6;
- }
- else if (addrlen == sizeof (struct IPv4UdpAddress))
- {
- t4 = addr;
- af = AF_INET;
- port = ntohs (t4->u4_port);
- memcpy (&a4, &t4->ipv4_addr, sizeof (a4));
- sb = &a4;
- }
- else
- return NULL;
- inet_ntop (af, sb, buf, INET6_ADDRSTRLEN);
- GNUNET_snprintf (rbuf,
- sizeof (rbuf),
- "%s:%u",
- buf,
- port);
- return rbuf;
-}
-
-
-
-/**
- * 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)
- {
- ret = strdup(udp_address_to_string(NULL, ppc->addr, ppc->addr_len));
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Error in name resolution:
`%s'\n",ret);
- ppc->asc (ppc->asc_cls, ret);
- 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 cls closure
- * @param type name of the transport that generated the address
- * @param addr one of the addresses of the host, NULL for the last address
- * the specific address format depends on the transport
- * @param addrlen length of the address
- * @param numeric should (IP) addresses be displayed in numeric form?
- * @param timeout after how long should we give up?
- * @param asc function to call on each string
- * @param asc_cls closure for asc
- */
-static void
-udp_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->u4_port;
- a4.sin_addr.s_addr = u4->ipv4_addr;
- port = ntohs (u4->u4_port);
- sb = &a4;
- sbs = sizeof (a4);
- }
- else
- {
- /* invalid address */
- GNUNET_break_op (0);
- asc (asc_cls, NULL);
- return;
- }
- ppc = GNUNET_malloc (sizeof (struct PrettyPrinterContext) + addrlen);
- ppc->asc = asc;
- ppc->asc_cls = asc_cls;
- ppc->port = port;
- ppc->addr = &ppc[1];
- ppc->addr_len = addrlen;
- memcpy(ppc->addr, addr, addrlen);
- GNUNET_RESOLVER_hostname_get (sb,
- sbs,
- !numeric, timeout, &append_port, ppc);
-}
-
-
-/**
- * Our external IP address/port mapping has changed.
- *
- * @param cls closure, the 'struct LocalAddrList'
- * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO
to mean
- * the previous (now invalid) one
- * @param addr either the previous or the new public IP address
- * @param addrlen actual lenght of the address
- */
-static void
-udp_nat_port_map_callback (void *cls,
- int add_remove,
- const struct sockaddr *addr,
- socklen_t addrlen)
-{
- struct Plugin *plugin = cls;
- struct IPv4UdpAddress u4;
- struct IPv6UdpAddress u6;
- void *arg;
- size_t args;
-
- /* convert 'addr' to our internal format */
- switch (addr->sa_family)
- {
- case AF_INET:
- GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
- u4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
- u4.u4_port = ((struct sockaddr_in *) addr)->sin_port;
- arg = &u4;
- args = sizeof (u4);
- break;
- case AF_INET6:
- GNUNET_assert (addrlen == sizeof (struct sockaddr_in6));
- memcpy (&u6.ipv6_addr,
- &((struct sockaddr_in6 *) addr)->sin6_addr,
- sizeof (struct in6_addr));
- u6.u6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
- arg = &u6;
- args = sizeof (u6);
- break;
- default:
- GNUNET_break (0);
- return;
- }
- /* modify our published address list */
- plugin->env->notify_address (plugin->env->cls,
- add_remove,
- arg, args);
-}
-
-
-/**
- * The exported method. Makes the core api available via a global and
- * returns the udp transport API.
- */
-void *
-libgnunet_plugin_transport_udp_init (void *cls)
-{
- struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
- unsigned long long mtu;
- unsigned long long port;
- struct GNUNET_TRANSPORT_PluginFunctions *api;
- struct Plugin *plugin;
- int sockets_created;
- struct sockaddr_in serverAddrv4;
- struct sockaddr_in6 serverAddrv6;
- struct sockaddr *serverAddr;
- struct sockaddr *addrs[2];
- socklen_t addrlens[2];
- socklen_t addrlen;
- unsigned int tries;
-
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_number (env->cfg,
- "transport-udp",
- "PORT",
- &port))
- port = UDP_NAT_DEFAULT_PORT;
- if (port > 65535)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Given `%s' option is out of range: %llu > %u\n"),
- "PORT",
- port,
- 65535);
- return NULL;
- }
-
- mtu = 1240;
- if (mtu < 1200)
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- _("MTU %llu for `%s' is probably too low!\n"), mtu,
- "UDP");
- plugin = GNUNET_malloc (sizeof (struct Plugin));
- plugin->port = port;
- plugin->env = env;
- api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
- api->cls = plugin;
-
- api->send = &udp_plugin_send;
- api->disconnect = &udp_disconnect;
- api->address_pretty_printer = &udp_plugin_address_pretty_printer;
- api->address_to_string = &udp_address_to_string;
- api->check_address = &udp_plugin_check_address;
-
- if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_string(env->cfg,
- "transport-udp",
- "BINDTO",
-
&plugin->bind_address))
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Binding udp plugin to specific address: `%s'\n",
- plugin->bind_address);
- if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_string(env->cfg,
- "transport-udp",
- "BINDTO6",
-
&plugin->bind6_address))
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Binding udp plugin to specific address: `%s'\n",
- plugin->bind6_address);
-
- sockets_created = 0;
- if ( (GNUNET_YES !=
- GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
- "gnunetd",
- "DISABLEV6")))
- {
- plugin->udp_sockv6.desc = GNUNET_NETWORK_socket_create (PF_INET6,
SOCK_DGRAM, 0);
- if (NULL == plugin->udp_sockv6.desc)
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "udp", "socket");
- }
- else
- {
- memset (&serverAddrv6, 0, sizeof (serverAddrv6));
-#if HAVE_SOCKADDR_IN_SIN_LEN
- serverAddrv6.sin6_len = sizeof (serverAddrv6);
-#endif
-
- serverAddrv6.sin6_family = AF_INET6;
- serverAddrv6.sin6_addr = in6addr_any;
- if (plugin->bind6_address != NULL)
- {
- if (1 != inet_pton(AF_INET6, plugin->bind6_address,
&serverAddrv6.sin6_addr))
- return 0;
- }
- serverAddrv6.sin6_port = htons (plugin->port);
- addrlen = sizeof (serverAddrv6);
- serverAddr = (struct sockaddr *) &serverAddrv6;
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Binding to IPv6 port %d\n",
- ntohs(serverAddrv6.sin6_port));
-#endif
- tries = 0;
- while (GNUNET_NETWORK_socket_bind (plugin->udp_sockv6.desc,
serverAddr, addrlen) !=
- GNUNET_OK)
- {
- serverAddrv6.sin6_port
- = htons (GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_STRONG,
33537) + 32000); /* Find a good, non-root port */
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "IPv6 Binding failed, trying new port %d\n",
- ntohs(serverAddrv6.sin6_port));
-#endif
- tries++;
- if (tries > 10)
- {
- GNUNET_NETWORK_socket_close (plugin->udp_sockv6.desc);
- plugin->udp_sockv6.desc = NULL;
- break;
- }
- }
- if (plugin->udp_sockv6.desc != NULL)
- {
- plugin->udp_sockv6.port = ntohs(serverAddrv6.sin6_port);
- addrs[sockets_created] = (struct sockaddr*) &serverAddrv6;
- addrlens[sockets_created] = sizeof (serverAddrv6);
- sockets_created++;
- }
- }
- }
-
- plugin->udp_sockv4.desc = GNUNET_NETWORK_socket_create (PF_INET, SOCK_DGRAM,
0);
- if (NULL == plugin->udp_sockv4.desc)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "socket");
- }
- else
- {
- memset (&serverAddrv4, 0, sizeof (serverAddrv4));
-#if HAVE_SOCKADDR_IN_SIN_LEN
- serverAddrv4.sin_len = sizeof (serverAddrv4);
-#endif
- serverAddrv4.sin_family = AF_INET;
- serverAddrv4.sin_addr.s_addr = INADDR_ANY;
- if (plugin->bind_address != NULL)
- {
- if (1 != inet_pton(AF_INET, plugin->bind_address,
&serverAddrv4.sin_addr))
- return 0;
- }
- serverAddrv4.sin_port = htons (plugin->port);
- addrlen = sizeof (serverAddrv4);
- serverAddr = (struct sockaddr *) &serverAddrv4;
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Binding to IPv4 port %d\n",
- ntohs(serverAddrv4.sin_port));
-#endif
- tries = 0;
- while (GNUNET_NETWORK_socket_bind (plugin->udp_sockv4.desc, serverAddr,
addrlen) !=
- GNUNET_OK)
- {
- serverAddrv4.sin_port = htons
(GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000); /*
Find a good, non-root port */
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "IPv4 Binding failed, trying new port %d\n",
- ntohs(serverAddrv4.sin_port));
-#endif
- tries++;
- if (tries > 10)
- {
- GNUNET_NETWORK_socket_close (plugin->udp_sockv4.desc);
- plugin->udp_sockv4.desc = NULL;
- break;
- }
- }
- if (plugin->udp_sockv4.desc != NULL)
- {
- plugin->udp_sockv4.port = ntohs(serverAddrv4.sin_port);
- addrs[sockets_created] = (struct sockaddr*) &serverAddrv4;
- addrlens[sockets_created] = sizeof (serverAddrv4);
- sockets_created++;
- }
- }
-
- plugin->rs = GNUNET_NETWORK_fdset_create ();
- GNUNET_NETWORK_fdset_zero (plugin->rs);
- if (NULL != plugin->udp_sockv4.desc)
- GNUNET_NETWORK_fdset_set (plugin->rs,
- plugin->udp_sockv4.desc);
- if (NULL != plugin->udp_sockv6.desc)
- GNUNET_NETWORK_fdset_set (plugin->rs,
- plugin->udp_sockv6.desc);
-
- plugin->select_task =
- GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
- GNUNET_SCHEDULER_NO_TASK,
- GNUNET_TIME_UNIT_FOREVER_REL, plugin->rs,
- NULL, &udp_plugin_select, plugin);
- if (sockets_created == 0)
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Failed to open UDP sockets\n"));
- plugin->nat = GNUNET_NAT_register (env->cfg,
- GNUNET_NO,
- port,
- sockets_created,
- (const struct sockaddr**) addrs, addrlens,
- &udp_nat_port_map_callback,
- &udp_plugin_reversal_callback,
- plugin);
- return api;
-}
-
-
-void *
-libgnunet_plugin_transport_udp_done (void *cls)
-{
- struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
- struct Plugin *plugin = api->cls;
-
- if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
- {
- GNUNET_SCHEDULER_cancel (plugin->select_task);
- plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
- }
- if (plugin->udp_sockv4.desc != NULL)
- {
- GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close
(plugin->udp_sockv4.desc));
- plugin->udp_sockv4.desc = NULL;
- }
- if (plugin->udp_sockv6.desc != NULL)
- {
- GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close
(plugin->udp_sockv6.desc));
- plugin->udp_sockv6.desc = NULL;
- }
- GNUNET_NETWORK_fdset_destroy (plugin->rs);
- GNUNET_NAT_unregister (plugin->nat);
- plugin->nat = NULL;
- GNUNET_free (plugin);
- GNUNET_free (api);
- return NULL;
-}
-
-/* end of plugin_transport_udp.c */
Copied: gnunet/src/transport/plugin_transport_udp.c (from rev 15970,
gnunet/src/transport/plugin_transport_udp_new.c)
===================================================================
--- gnunet/src/transport/plugin_transport_udp.c (rev 0)
+++ gnunet/src/transport/plugin_transport_udp.c 2011-07-14 17:45:45 UTC (rev
15971)
@@ -0,0 +1,1620 @@
+/*
+ This file is part of GNUnet
+ (C) 2010, 2011 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
+ by the Free Software Foundation; either version 3, or (at your
+ option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file transport/plugin_transport_udp.c
+ * @brief Implementation of the UDP NAT punching
+ * transport service
+ * @author Christian Grothoff
+ * @author Nathan Evans
+ */
+#include "platform.h"
+#include "gnunet_hello_lib.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_fragmentation_lib.h"
+#include "gnunet_nat_lib.h"
+#include "gnunet_protocols.h"
+#include "gnunet_resolver_service.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_UDP GNUNET_NO
+
+/**
+ * MTU for fragmentation subsystem. Should be conservative since
+ * all communicating peers MUST work with this MTU.
+ */
+#define UDP_MTU 1400
+
+/**
+ * Number of messages we can defragment in parallel. We only really
+ * defragment 1 message at a time, but if messages get re-ordered, we
+ * may want to keep knowledge about the previous message to avoid
+ * discarding the current message in favor of a single fragment of a
+ * previous message. 3 should be good since we don't expect massive
+ * message reorderings with UDP.
+ */
+#define UDP_MAX_MESSAGES_IN_DEFRAG 3
+
+/**
+ * We keep a defragmentation queue per sender address. How many
+ * sender addresses do we support at the same time? Memory consumption
+ * is roughly a factor of 32k * UDP_MAX_MESSAGES_IN_DEFRAG times this
+ * value. (So 128 corresponds to 12 MB and should suffice for
+ * connecting to roughly 128 peers via UDP).
+ */
+#define UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG 128
+
+
+/**
+ * UDP Message-Packet header (after defragmentation).
+ */
+struct UDPMessage
+{
+ /**
+ * Message header.
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * Always zero for now.
+ */
+ uint32_t reserved;
+
+ /**
+ * What is the identity of the sender
+ */
+ struct GNUNET_PeerIdentity sender;
+
+};
+
+
+/**
+ * Network format for IPv4 addresses.
+ */
+struct IPv4UdpAddress
+{
+ /**
+ * IPv4 address, in network byte order.
+ */
+ uint32_t ipv4_addr GNUNET_PACKED;
+
+ /**
+ * Port number, in network byte order.
+ */
+ uint16_t u4_port GNUNET_PACKED;
+};
+
+
+/**
+ * Network format for IPv6 addresses.
+ */
+struct IPv6UdpAddress
+{
+
+ /**
+ * IPv6 address.
+ */
+ struct in6_addr ipv6_addr GNUNET_PACKED;
+
+ /**
+ * Port number, in network byte order.
+ */
+ uint16_t u6_port GNUNET_PACKED;
+};
+
+
+/* Forward definition */
+struct Plugin;
+
+
+/**
+ * Session with another peer.
+ */
+struct PeerSession
+{
+
+ /**
+ * Which peer is this session for?
+ */
+ struct GNUNET_PeerIdentity target;
+
+ /**
+ * Pointer to the global plugin struct.
+ */
+ struct Plugin *plugin;
+
+ /**
+ * Address of the other peer
+ */
+ const struct sockaddr *sock_addr;
+
+ /**
+ * Function to call upon completion of the transmission.
+ */
+ GNUNET_TRANSPORT_TransmitContinuation cont;
+
+ /**
+ * Closure for 'cont'.
+ */
+ void *cont_cls;
+
+ /**
+ * Current outgoing message to this peer.
+ */
+ struct GNUNET_FRAGMENT_Context *frag;
+
+};
+
+
+/**
+ * Data structure to track defragmentation contexts based
+ * on the source of the UDP traffic.
+ */
+struct ReceiveContext
+{
+
+ /**
+ * Defragmentation context.
+ */
+ struct GNUNET_DEFRAGMENT_Context *defrag;
+
+ /**
+ * Source address this receive context is for (allocated at the
+ * end of the struct).
+ */
+ const struct sockaddr *src_addr;
+
+ /**
+ * Reference to master plugin struct.
+ */
+ struct Plugin *plugin;
+
+ /**
+ * Node in the defrag heap.
+ */
+ struct GNUNET_CONTAINER_HeapNode *hnode;
+
+ /**
+ * Length of 'src_addr'
+ */
+ size_t addr_len;
+
+};
+
+
+/**
+ * Encapsulation of all of the state of the plugin.
+ */
+struct Plugin
+{
+
+ /**
+ * Our environment.
+ */
+ struct GNUNET_TRANSPORT_PluginEnvironment *env;
+
+ /**
+ * Session of peers with whom we are currently connected,
+ * map of peer identity to 'struct PeerSession'.
+ */
+ struct GNUNET_CONTAINER_MultiHashMap *sessions;
+
+ /**
+ * Heap with all of our defragmentation activities.
+ */
+ struct GNUNET_CONTAINER_Heap *defrags;
+
+ /**
+ * ID of select task
+ */
+ GNUNET_SCHEDULER_TaskIdentifier select_task;
+
+ /**
+ * Tokenizer for inbound messages.
+ */
+ struct GNUNET_SERVER_MessageStreamTokenizer *mst;
+
+ /**
+ * Bandwidth tracker to limit global UDP traffic.
+ */
+ struct GNUNET_BANDWIDTH_Tracker tracker;
+
+ /**
+ * Address we were told to bind to exclusively (IPv4).
+ */
+ char *bind4_address;
+
+ /**
+ * Address we were told to bind to exclusively (IPv6).
+ */
+ char *bind6_address;
+
+ /**
+ * Handle to NAT traversal support.
+ */
+ struct GNUNET_NAT_Handle *nat;
+
+ /**
+ * FD Read set
+ */
+ struct GNUNET_NETWORK_FDSet *rs;
+
+ /**
+ * The read socket for IPv4
+ */
+ struct GNUNET_NETWORK_Handle *sockv4;
+
+ /**
+ * The read socket for IPv6
+ */
+ struct GNUNET_NETWORK_Handle *sockv6;
+
+ /**
+ * expected delay for ACKs
+ */
+ struct GNUNET_TIME_Relative last_expected_delay;
+
+ /**
+ * Port we listen on.
+ */
+ uint16_t port;
+
+ /**
+ * Port we advertise on.
+ */
+ uint16_t aport;
+
+};
+
+
+/**
+ * Lookup the session for the given peer.
+ *
+ * @param plugin the plugin
+ * @param peer peer's identity
+ * @return NULL if we have no session
+ */
+struct PeerSession *
+find_session (struct Plugin *plugin,
+ const struct GNUNET_PeerIdentity *peer)
+{
+ return GNUNET_CONTAINER_multihashmap_get (plugin->sessions,
+ &peer->hashPubKey);
+}
+
+
+/**
+ * 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
+udp_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
+{
+ struct Plugin *plugin = cls;
+ struct PeerSession *session;
+
+ session = find_session (plugin, target);
+ if (NULL == session)
+ return;
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap_remove (plugin->sessions,
+ &target->hashPubKey,
+ session));
+ plugin->last_expected_delay = GNUNET_FRAGMENT_context_destroy
(session->frag);
+ session->cont (session->cont_cls, target, GNUNET_SYSERR);
+ GNUNET_free (session);
+}
+
+
+/**
+ * Actually send out the message.
+ *
+ * @param plugin the plugin
+ * @param send_handle which handle to send message on
+ * @param target who should receive this message (ignored by UDP)
+ * @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 UDP)
+ * @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 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
+ */
+static ssize_t
+udp_send (struct Plugin *plugin,
+ const struct sockaddr *sa,
+ const struct GNUNET_MessageHeader *msg)
+{
+ ssize_t sent;
+ size_t slen;
+
+ switch (sa->sa_family)
+ {
+ case AF_INET:
+ sent =
+ GNUNET_NETWORK_socket_sendto (plugin->sockv4,
+ msg,
+ ntohs (msg->size),
+ sa,
+ slen = sizeof (struct sockaddr_in));
+ break;
+ case AF_INET6:
+ sent =
+ GNUNET_NETWORK_socket_sendto (plugin->sockv6,
+ msg,
+ ntohs (msg->size),
+ sa,
+ slen = sizeof (struct sockaddr_in6));
+ break;
+ default:
+ GNUNET_break (0);
+ return 0;
+ }
+ if (GNUNET_SYSERR == sent)
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_INFO,
+ "sendto");
+#if DEBUG_UDP
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "UDP transmited %u-byte message to %s (%d: %s)\n",
+ (unsigned int) ntohs (msg->size),
+ GNUNET_a2s (sa, slen),
+ (int) sent,
+ (sent < 0) ? STRERROR (errno) : "ok");
+#endif
+ return sent;
+}
+
+
+/**
+ * Function that is called with messages created by the fragmentation
+ * module. In the case of the 'proc' callback of the
+ * GNUNET_FRAGMENT_context_create function, this function must
+ * eventually call 'GNUNET_FRAGMENT_context_transmission_done'.
+ *
+ * @param cls closure, the 'struct PeerSession'
+ * @param msg the message that was created
+ */
+static void
+send_fragment (void *cls,
+ const struct GNUNET_MessageHeader *msg)
+{
+ struct PeerSession *session = cls;
+
+ udp_send (session->plugin,
+ session->sock_addr,
+ msg);
+ GNUNET_FRAGMENT_context_transmission_done (session->frag);
+}
+
+
+/**
+ * Function that can be used by the transport service to transmit
+ * a message using the plugin.
+ *
+ * @param cls closure
+ * @param target who should receive this message (ignored by UDP)
+ * @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 UDP)
+ * @param timeout when should we time out (give up) if we can not transmit?
+ * @param session identifier used for this session (NULL for UDP)
+ * @param addr the addr to send the message to
+ * @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 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 (may return 0 and the message can
+ * still be transmitted later!)
+ */
+static ssize_t
+udp_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 Plugin *plugin = cls;
+ struct PeerSession *peer_session;
+ const struct IPv4UdpAddress *t4;
+ const struct IPv6UdpAddress *t6;
+ struct sockaddr_in *v4;
+ struct sockaddr_in6 *v6;
+ size_t mlen = msgbuf_size + sizeof (struct UDPMessage);
+ char mbuf[mlen];
+ struct UDPMessage *udp;
+
+ if (force_address == GNUNET_SYSERR)
+ return GNUNET_SYSERR;
+ GNUNET_assert (NULL == session);
+ if (mlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ switch (addrlen)
+ {
+ case sizeof(struct IPv4UdpAddress):
+ t4 = addr;
+ peer_session = GNUNET_malloc (sizeof (struct PeerSession) + sizeof
(struct sockaddr_in));
+ v4 = (struct sockaddr_in*) &peer_session[1];
+ v4->sin_family = AF_INET;
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ v4->sin_len = sizeof (struct sockaddr_in);
+#endif
+ v4->sin_port = t4->u4_port;
+ v4->sin_addr.s_addr = t4->ipv4_addr;
+ break;
+ case sizeof(struct IPv6UdpAddress):
+ t6 = addr;
+ peer_session = GNUNET_malloc (sizeof (struct PeerSession) + sizeof
(struct sockaddr_in6));
+ v6 = (struct sockaddr_in6*) &peer_session[1];
+ v6->sin6_family = AF_INET6;
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ v6->sin6_len = sizeof (struct sockaddr_in6);
+#endif
+ v6->sin6_port = t6->u6_port;
+ v6->sin6_addr = t6->ipv6_addr;
+ break;
+ default:
+ /* Must have a valid address to send to */
+ GNUNET_break_op(0);
+ return GNUNET_SYSERR;
+ }
+ udp = (struct UDPMessage*) mbuf;
+ udp->header.size = htons (mlen);
+ udp->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE);
+ udp->reserved = htonl (0);
+ udp->sender = *plugin->env->my_identity;
+ memcpy (&udp[1], msgbuf, msgbuf_size);
+ peer_session->target = *target;
+ peer_session->plugin = plugin;
+ peer_session->sock_addr = (const struct sockaddr*) &peer_session[1];
+ peer_session->cont = cont;
+ peer_session->cont_cls = cont_cls;
+ if (mlen <= UDP_MTU)
+ {
+ mlen = udp_send (plugin,
+ peer_session->sock_addr,
+ &udp->header);
+ cont (cont_cls, target, (mlen > 0) ? GNUNET_OK : GNUNET_SYSERR);
+ GNUNET_free (peer_session);
+ }
+ else
+ {
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap_put (plugin->sessions,
+ &target->hashPubKey,
+ peer_session,
+
GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+ peer_session->frag = GNUNET_FRAGMENT_context_create (plugin->env->stats,
+ UDP_MTU,
+ &plugin->tracker,
+
plugin->last_expected_delay,
+ &udp->header,
+ &send_fragment,
+ peer_session);
+ }
+ return mlen;
+}
+
+
+/**
+ * Closure for 'process_inbound_tokenized_messages'
+ */
+struct SourceInformation
+{
+ /**
+ * Sender identity.
+ */
+ struct GNUNET_PeerIdentity sender;
+
+ /**
+ * Source address.
+ */
+ const void *arg;
+
+ /**
+ * Number of bytes in source address.
+ */
+ size_t args;
+};
+
+
+/**
+ * Message tokenizer has broken up an incomming message. Pass it on
+ * to the service.
+ *
+ * @param cls the 'struct Plugin'
+ * @param client the 'struct SourceInformation'
+ * @param hdr the actual message
+ */
+static void
+process_inbound_tokenized_messages (void *cls,
+ void *client,
+ const struct GNUNET_MessageHeader *hdr)
+{
+ struct Plugin *plugin = cls;
+ struct SourceInformation* si = client;
+ struct GNUNET_TRANSPORT_ATS_Information distance[2];
+
+ /* setup ATS */
+ 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);
+
+ plugin->env->receive (plugin->env->cls,
+ &si->sender,
+ hdr,
+ distance, 2,
+ NULL,
+ si->arg, si->args);
+}
+
+
+/**
+ * We've received a UDP Message. Process it (pass contents to main service).
+ *
+ * @param plugin plugin context
+ * @param msg the message
+ * @param sender_addr sender address
+ * @param sender_addr_len number of bytes in sender_addr
+ */
+static void
+process_udp_message (struct Plugin *plugin,
+ const struct UDPMessage *msg,
+ const struct sockaddr *sender_addr,
+ socklen_t sender_addr_len)
+{
+ struct SourceInformation si;
+ struct IPv4UdpAddress u4;
+ struct IPv6UdpAddress u6;
+ const void *arg;
+ size_t args;
+
+ if (0 != ntohl (msg->reserved))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+ if (ntohs (msg->header.size) < sizeof (struct GNUNET_MessageHeader) + sizeof
(struct UDPMessage))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+
+ /* convert address */
+ switch (sender_addr->sa_family)
+ {
+ case AF_INET:
+ GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in));
+ u4.ipv4_addr = ((struct sockaddr_in *) sender_addr)->sin_addr.s_addr;
+ u4.u4_port = ((struct sockaddr_in *) sender_addr)->sin_port;
+ arg = &u4;
+ args = sizeof (u4);
+ break;
+ case AF_INET6:
+ GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in6));
+ u6.ipv6_addr = ((struct sockaddr_in6*) sender_addr)->sin6_addr;
+ u6.u6_port = ((struct sockaddr_in6 *) sender_addr)->sin6_port;
+ arg = &u6;
+ args = sizeof (u6);
+ break;
+ default:
+ GNUNET_break (0);
+ return;
+ }
+#if DEBUG_UDP
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
+ "udp",
+ "Received message with %u bytes from peer `%s' at `%s'\n",
+ (unsigned int) ntohs (msg->header.size),
+ GNUNET_i2s (&msg->sender),
+ GNUNET_a2s (sender_addr, sender_addr_len));
+#endif
+
+ /* iterate over all embedded messages */
+ si.sender = msg->sender;
+ si.arg = arg;
+ si.args = args;
+ GNUNET_SERVER_mst_receive (plugin->mst,
+ &si,
+ (const char*) &msg[1],
+ ntohs (msg->header.size) - sizeof (struct
UDPMessage),
+ GNUNET_YES,
+ GNUNET_NO);
+}
+
+
+/**
+ * Process a defragmented message.
+ *
+ * @param cls the 'struct ReceiveContext'
+ * @param msg the message
+ */
+static void
+fragment_msg_proc (void *cls,
+ const struct GNUNET_MessageHeader *msg)
+{
+ struct ReceiveContext *rc = cls;
+
+ if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE)
+ {
+ GNUNET_break (0);
+ return;
+ }
+ if (ntohs (msg->size) < sizeof(struct UDPMessage))
+ {
+ GNUNET_break (0);
+ return;
+ }
+ process_udp_message (rc->plugin,
+ (const struct UDPMessage*) msg,
+ rc->src_addr,
+ rc->addr_len);
+}
+
+
+/**
+ * Transmit an acknowledgement.
+ *
+ * @param cls the 'struct ReceiveContext'
+ * @param id message ID (unused)
+ * @param msg ack to transmit
+ */
+static void
+ack_proc (void *cls,
+ uint32_t id,
+ const struct GNUNET_MessageHeader *msg)
+{
+ struct ReceiveContext *rc = cls;
+ size_t msize = sizeof (struct UDPMessage) + ntohs (msg->size);
+ char buf[msize];
+ struct UDPMessage *udp;
+
+#if DEBUG_UDP
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
+ "udp",
+ "Sending ACK to `%s'\n",
+ GNUNET_a2s (rc->src_addr,
+ (rc->src_addr->sa_family == AF_INET)
+ ? sizeof (struct sockaddr_in)
+ : sizeof (struct sockaddr_in6)));
+#endif
+ udp = (struct UDPMessage*) buf;
+ udp->header.size = htons ((uint16_t) msize);
+ udp->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK);
+ udp->reserved = htonl (0);
+ udp->sender = *rc->plugin->env->my_identity;
+ memcpy (&udp[1], msg, ntohs (msg->size));
+ (void) udp_send (rc->plugin,
+ rc->src_addr,
+ &udp->header);
+}
+
+
+/**
+ * Closure for 'find_receive_context'.
+ */
+struct FindReceiveContext
+{
+ /**
+ * Where to store the result.
+ */
+ struct ReceiveContext *rc;
+
+ /**
+ * Address to find.
+ */
+ const struct sockaddr *addr;
+
+ /**
+ * Number of bytes in 'addr'.
+ */
+ socklen_t addr_len;
+};
+
+
+/**
+ * Scan the heap for a receive context with the given address.
+ *
+ * @param cls the 'struct FindReceiveContext'
+ * @param node internal node of the heap
+ * @param element value stored at the node (a 'struct ReceiveContext')
+ * @param cost cost associated with the node
+ * @return GNUNET_YES if we should continue to iterate,
+ * GNUNET_NO if not.
+ */
+static int
+find_receive_context (void *cls,
+ struct GNUNET_CONTAINER_HeapNode *node,
+ void *element,
+ GNUNET_CONTAINER_HeapCostType cost)
+{
+ struct FindReceiveContext *frc = cls;
+ struct ReceiveContext *e = element;
+
+ if ( (frc->addr_len == e->addr_len) &&
+ (0 == memcmp (frc->addr,
+ e->src_addr,
+ frc->addr_len) ) )
+ {
+ frc->rc = e;
+ return GNUNET_NO;
+ }
+ return GNUNET_YES;
+}
+
+
+/**
+ * Read and process a message from the given socket.
+ *
+ * @param plugin the overall plugin
+ * @param rsock socket to read from
+ */
+static void
+udp_read (struct Plugin *plugin,
+ struct GNUNET_NETWORK_Handle *rsock)
+{
+ socklen_t fromlen;
+ char addr[32];
+ char buf[65536];
+ ssize_t ret;
+ const struct GNUNET_MessageHeader *msg;
+ const struct GNUNET_MessageHeader *ack;
+ struct PeerSession *peer_session;
+ const struct UDPMessage *udp;
+ struct ReceiveContext *rc;
+ struct GNUNET_TIME_Absolute now;
+ struct FindReceiveContext frc;
+
+ fromlen = sizeof (addr);
+ memset (&addr, 0, sizeof(addr));
+ ret = GNUNET_NETWORK_socket_recvfrom (rsock, buf, sizeof (buf),
+ (struct sockaddr *)&addr, &fromlen);
+ if (ret < sizeof (struct GNUNET_MessageHeader))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+#if DEBUG_UDP
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "UDP received %u-byte message from `%s'\n",
+ (unsigned int) ret,
+ GNUNET_a2s ((const struct sockaddr*) addr, fromlen));
+#endif
+ msg = (const struct GNUNET_MessageHeader *) buf;
+ if (ret != ntohs (msg->size))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+ switch (ntohs (msg->type))
+ {
+ case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE:
+ if (ntohs (msg->size) < sizeof (struct UDPMessage))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+ process_udp_message (plugin,
+ (const struct UDPMessage *) msg,
+ (const struct sockaddr*) addr,
+ fromlen);
+ return;
+ case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK:
+ if (ntohs (msg->size) < sizeof (struct UDPMessage) + sizeof (struct
GNUNET_MessageHeader))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+ udp = (const struct UDPMessage *) msg;
+ if (ntohl (udp->reserved) != 0)
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+ ack = (const struct GNUNET_MessageHeader*) &udp[1];
+ if (ntohs (ack->size) != ntohs (msg->size) - sizeof (struct UDPMessage))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+#if DEBUG_UDP
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "UDP processes %u-byte acknowledgement from `%s' at `%s'\n",
+ (unsigned int) ntohs (msg->size),
+ GNUNET_i2s (&udp->sender),
+ GNUNET_a2s ((const struct sockaddr*) addr, fromlen));
+#endif
+
+ peer_session = find_session (plugin, &udp->sender);
+ if (NULL == peer_session)
+ {
+#if DEBUG_UDP
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Session for ACK not found, dropping ACK!\n");
+#endif
+ return;
+ }
+ if (GNUNET_OK !=
+ GNUNET_FRAGMENT_process_ack (peer_session->frag,
+ ack))
+ return;
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap_remove (plugin->sessions,
+
&udp->sender.hashPubKey,
+ peer_session));
+ GNUNET_FRAGMENT_context_destroy (peer_session->frag);
+ peer_session->cont (peer_session->cont_cls,
+ &udp->sender,
+ GNUNET_OK);
+ GNUNET_free (peer_session);
+ return;
+ case GNUNET_MESSAGE_TYPE_FRAGMENT:
+ frc.rc = NULL;
+ frc.addr = (const struct sockaddr*) addr;
+ frc.addr_len = fromlen;
+ GNUNET_CONTAINER_heap_iterate (plugin->defrags,
+ &find_receive_context,
+ &frc);
+ now = GNUNET_TIME_absolute_get ();
+ rc = frc.rc;
+ if (rc == NULL)
+ {
+ /* need to create a new RC */
+ rc = GNUNET_malloc (sizeof (struct ReceiveContext) + fromlen);
+ memcpy (&rc[1], addr, fromlen);
+ rc->src_addr = (const struct sockaddr*) &rc[1];
+ rc->addr_len = fromlen;
+ rc->plugin = plugin;
+ rc->defrag = GNUNET_DEFRAGMENT_context_create (plugin->env->stats,
+ UDP_MTU,
+
UDP_MAX_MESSAGES_IN_DEFRAG,
+ rc,
+ &fragment_msg_proc,
+ &ack_proc);
+ rc->hnode = GNUNET_CONTAINER_heap_insert (plugin->defrags,
+ rc,
+
(GNUNET_CONTAINER_HeapCostType) now.abs_value);
+ }
+#if DEBUG_UDP
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "UDP processes %u-byte fragment from `%s'\n",
+ (unsigned int) ntohs (msg->size),
+ GNUNET_a2s ((const struct sockaddr*) addr, fromlen));
+#endif
+
+ if (GNUNET_OK ==
+ GNUNET_DEFRAGMENT_process_fragment (rc->defrag,
+ msg))
+ {
+ /* keep this 'rc' from expiring */
+ GNUNET_CONTAINER_heap_update_cost (plugin->defrags,
+ rc->hnode,
+ (GNUNET_CONTAINER_HeapCostType)
now.abs_value);
+ }
+ if (GNUNET_CONTAINER_heap_get_size (plugin->defrags) >
UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG)
+ {
+ /* remove 'rc' that was inactive the longest */
+ rc = GNUNET_CONTAINER_heap_remove_root (plugin->defrags);
+ GNUNET_DEFRAGMENT_context_destroy (rc->defrag);
+ GNUNET_free (rc);
+ }
+ return;
+ default:
+ GNUNET_break_op (0);
+ return;
+ }
+}
+
+
+/**
+ * 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
+udp_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 (GNUNET_NETWORK_fdset_isset (tc->read_ready,
+ plugin->sockv4))
+ udp_read (plugin, plugin->sockv4);
+ if (GNUNET_NETWORK_fdset_isset (tc->read_ready,
+ plugin->sockv6))
+ udp_read (plugin, plugin->sockv6);
+ plugin->select_task =
+ GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
+ GNUNET_SCHEDULER_NO_TASK,
+ GNUNET_TIME_UNIT_FOREVER_REL, plugin->rs,
+ NULL, &udp_plugin_select, plugin);
+
+}
+
+
+/**
+ * Check if the given port is plausible (must be either our listen
+ * port or our advertised port). If it is neither, we return
+ * GNUNET_SYSERR.
+ *
+ * @param plugin global variables
+ * @param in_port port number to check
+ * @return GNUNET_OK if port is either open_port or adv_port
+ */
+static int
+check_port (struct Plugin *plugin, uint16_t in_port)
+{
+ if ( (in_port == plugin->port) ||
+ (in_port == plugin->aport) )
+ return GNUNET_OK;
+ return GNUNET_SYSERR;
+}
+
+
+/**
+ * Function that will be called to check if a binary address for this
+ * plugin is well-formed and corresponds to an address for THIS peer
+ * (as per our configuration). Naturally, if absolutely necessary,
+ * plugins can be a bit conservative in their answer, but in general
+ * plugins should make sure that the address does not redirect
+ * traffic to a 3rd party that might try to man-in-the-middle our
+ * traffic.
+ *
+ * @param cls closure, should be our handle to the Plugin
+ * @param addr pointer to the address
+ * @param addrlen length of addr
+ * @return GNUNET_OK if this is a plausible address for this peer
+ * and transport, GNUNET_SYSERR if not
+ *
+ */
+static int
+udp_plugin_check_address (void *cls,
+ const void *addr,
+ size_t addrlen)
+{
+ struct Plugin *plugin = cls;
+ struct IPv4UdpAddress *v4;
+ struct IPv6UdpAddress *v6;
+
+ if ((addrlen != sizeof (struct IPv4UdpAddress)) &&
+ (addrlen != sizeof (struct IPv6UdpAddress)))
+ {
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
+ }
+ if (addrlen == sizeof (struct IPv4UdpAddress))
+ {
+ v4 = (struct IPv4UdpAddress *) addr;
+ if (GNUNET_OK !=
+ check_port (plugin, ntohs (v4->u4_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 IPv6UdpAddress *) addr;
+ if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
+ {
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
+ }
+ if (GNUNET_OK !=
+ check_port (plugin, ntohs (v6->u6_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;
+}
+
+
+/**
+ * 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
+ * to override the address again.
+ *
+ * @param cls closure
+ * @param addr binary address
+ * @param addrlen length of the address
+ * @return string representing the same address
+ */
+static const char*
+udp_address_to_string (void *cls,
+ const void *addr,
+ size_t addrlen)
+{
+ static char rbuf[INET6_ADDRSTRLEN + 10];
+ char buf[INET6_ADDRSTRLEN];
+ const void *sb;
+ struct in_addr a4;
+ struct in6_addr a6;
+ const struct IPv4UdpAddress *t4;
+ const struct IPv6UdpAddress *t6;
+ int af;
+ uint16_t port;
+
+ if (addrlen == sizeof (struct IPv6UdpAddress))
+ {
+ t6 = addr;
+ af = AF_INET6;
+ port = ntohs (t6->u6_port);
+ memcpy (&a6, &t6->ipv6_addr, sizeof (a6));
+ sb = &a6;
+ }
+ else if (addrlen == sizeof (struct IPv4UdpAddress))
+ {
+ t4 = addr;
+ af = AF_INET;
+ port = ntohs (t4->u4_port);
+ memcpy (&a4, &t4->ipv4_addr, sizeof (a4));
+ sb = &a4;
+ }
+ else
+ {
+ GNUNET_break_op (0);
+ return NULL;
+ }
+ inet_ntop (af, sb, buf, INET6_ADDRSTRLEN);
+ GNUNET_snprintf (rbuf,
+ sizeof (rbuf),
+ "%s:%u",
+ buf,
+ port);
+ return rbuf;
+}
+
+
+/**
+ * Closure for 'append_port'.
+ */
+struct PrettyPrinterContext
+{
+ /**
+ * Function to call with the result.
+ */
+ GNUNET_TRANSPORT_AddressStringCallback asc;
+
+ /**
+ * Clsoure for 'asc'.
+ */
+ void *asc_cls;
+
+ /**
+ * Port to add after the IP address.
+ */
+ uint16_t port;
+};
+
+
+/**
+ * Append our port and forward the result.
+ *
+ * @param cls a 'struct PrettyPrinterContext'
+ * @param hostname result from DNS resolver
+ */
+static void
+append_port (void *cls, const char *hostname)
+{
+ struct PrettyPrinterContext *ppc = cls;
+ char *ret;
+
+ if (hostname == NULL)
+ {
+ ppc->asc (NULL, ret);
+ 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 cls closure
+ * @param type name of the transport that generated the address
+ * @param addr one of the addresses of the host, NULL for the last address
+ * the specific address format depends on the transport
+ * @param addrlen length of the address
+ * @param numeric should (IP) addresses be displayed in numeric form?
+ * @param timeout after how long should we give up?
+ * @param asc function to call on each string
+ * @param asc_cls closure for asc
+ */
+static void
+udp_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;
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ a6.sin6_len = sizeof (a6);
+#endif
+ 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;
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ a4.sin_len = sizeof (a4);
+#endif
+ a4.sin_port = u4->u4_port;
+ a4.sin_addr.s_addr = u4->ipv4_addr;
+ port = ntohs (u4->u4_port);
+ sb = &a4;
+ sbs = sizeof (a4);
+ }
+ 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);
+}
+
+
+/**
+ * Our external IP address/port mapping has changed.
+ *
+ * @param cls closure, the 'struct LocalAddrList'
+ * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO
to mean
+ * the previous (now invalid) one
+ * @param addr either the previous or the new public IP address
+ * @param addrlen actual lenght of the address
+ */
+static void
+udp_nat_port_map_callback (void *cls,
+ int add_remove,
+ const struct sockaddr *addr,
+ socklen_t addrlen)
+{
+ struct Plugin *plugin = cls;
+ struct IPv4UdpAddress u4;
+ struct IPv6UdpAddress u6;
+ void *arg;
+ size_t args;
+
+ /* convert 'addr' to our internal format */
+ switch (addr->sa_family)
+ {
+ case AF_INET:
+ GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
+ u4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
+ u4.u4_port = ((struct sockaddr_in *) addr)->sin_port;
+ arg = &u4;
+ args = sizeof (u4);
+ break;
+ case AF_INET6:
+ GNUNET_assert (addrlen == sizeof (struct sockaddr_in6));
+ memcpy (&u6.ipv6_addr,
+ &((struct sockaddr_in6 *) addr)->sin6_addr,
+ sizeof (struct in6_addr));
+ u6.u6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
+ arg = &u6;
+ args = sizeof (u6);
+ break;
+ default:
+ GNUNET_break (0);
+ return;
+ }
+ /* modify our published address list */
+ plugin->env->notify_address (plugin->env->cls,
+ add_remove,
+ arg, args);
+}
+
+
+/**
+ * The exported method. Makes the core api available via a global and
+ * returns the udp transport API.
+ *
+ * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
+ * @return our 'struct GNUNET_TRANSPORT_PluginFunctions'
+ */
+void *
+libgnunet_plugin_transport_udp_init (void *cls)
+{
+ struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
+ unsigned long long port;
+ unsigned long long aport;
+ struct GNUNET_TRANSPORT_PluginFunctions *api;
+ struct Plugin *plugin;
+ int sockets_created;
+ struct sockaddr_in serverAddrv4;
+ struct sockaddr_in6 serverAddrv6;
+ struct sockaddr *serverAddr;
+ struct sockaddr *addrs[2];
+ socklen_t addrlens[2];
+ socklen_t addrlen;
+ unsigned int tries;
+ unsigned long long udp_max_bps;
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (env->cfg,
+ "transport-udp",
+ "PORT",
+ &port))
+ port = 2086;
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (env->cfg,
+ "transport-udp",
+ "MAX_BPS",
+ &udp_max_bps))
+ udp_max_bps = 1024 * 1024 * 100; /* 100 MB/s == infinity for practical
purposes */
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (env->cfg,
+ "transport-udp",
+ "ADVERTISED_PORT",
+ &aport))
+ aport = port;
+ if (port > 65535)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ _("Given `%s' option is out of range: %llu > %u\n"),
+ "PORT",
+ port,
+ 65535);
+ return NULL;
+ }
+ memset (&serverAddrv6, 0, sizeof (serverAddrv6));
+ memset (&serverAddrv4, 0, sizeof (serverAddrv4));
+
+ plugin = GNUNET_malloc (sizeof (struct Plugin));
+ GNUNET_BANDWIDTH_tracker_init (&plugin->tracker,
+ GNUNET_BANDWIDTH_value_init ((uint32_t)
udp_max_bps),
+ 30);
+ plugin->last_expected_delay = GNUNET_TIME_UNIT_SECONDS;
+ plugin->port = port;
+ plugin->aport = aport;
+ plugin->env = env;
+ api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
+ api->cls = plugin;
+
+ api->send = &udp_plugin_send;
+ api->disconnect = &udp_disconnect;
+ api->address_pretty_printer = &udp_plugin_address_pretty_printer;
+ api->address_to_string = &udp_address_to_string;
+ api->check_address = &udp_plugin_check_address;
+
+ if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_string(env->cfg,
+ "transport-udp",
+ "BINDTO",
+
&plugin->bind4_address))
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "Binding udp plugin to specific address: `%s'\n",
+ plugin->bind4_address);
+ if (1 != inet_pton(AF_INET,
+ plugin->bind4_address,
+ &serverAddrv4.sin_addr))
+ {
+ GNUNET_free (plugin->bind4_address);
+ GNUNET_free (plugin);
+ return NULL;
+ }
+ }
+
+ if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_string(env->cfg,
+ "transport-udp",
+ "BINDTO6",
+
&plugin->bind6_address))
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "Binding udp plugin to specific address: `%s'\n",
+ plugin->bind6_address);
+ if (1 != inet_pton(AF_INET6,
+ plugin->bind6_address,
+ &serverAddrv6.sin6_addr))
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
+ _("Invalid IPv6 address: `%s'\n"),
+ plugin->bind6_address);
+ GNUNET_free_non_null (plugin->bind4_address);
+ GNUNET_free (plugin->bind6_address);
+ GNUNET_free (plugin);
+ return NULL;
+ }
+ }
+
+ plugin->defrags = GNUNET_CONTAINER_heap_create
(GNUNET_CONTAINER_HEAP_ORDER_MIN);
+ plugin->sessions = GNUNET_CONTAINER_multihashmap_create
(UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG * 2);
+ sockets_created = 0;
+ if ( (GNUNET_YES !=
+ GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
+ "nat",
+ "DISABLEV6")))
+ {
+ plugin->sockv6 = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_DGRAM, 0);
+ if (NULL == plugin->sockv6)
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
+ }
+ else
+ {
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ serverAddrv6.sin6_len = sizeof (serverAddrv6);
+#endif
+ serverAddrv6.sin6_family = AF_INET6;
+ serverAddrv6.sin6_addr = in6addr_any;
+ serverAddrv6.sin6_port = htons (plugin->port);
+ addrlen = sizeof (serverAddrv6);
+ serverAddr = (struct sockaddr *) &serverAddrv6;
+#if DEBUG_UDP
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Binding to IPv6 port %d\n",
+ ntohs(serverAddrv6.sin6_port));
+#endif
+ tries = 0;
+ while (GNUNET_NETWORK_socket_bind (plugin->sockv6,
+ serverAddr, addrlen) !=
+ GNUNET_OK)
+ {
+ serverAddrv6.sin6_port
+ = htons (GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_STRONG,
33537) + 32000); /* Find a good, non-root port */
+#if DEBUG_UDP
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "IPv6 Binding failed, trying new port %d\n",
+ ntohs(serverAddrv6.sin6_port));
+#endif
+ tries++;
+ if (tries > 10)
+ {
+ GNUNET_NETWORK_socket_close (plugin->sockv6);
+ plugin->sockv6 = NULL;
+ break;
+ }
+ }
+ if (plugin->sockv6 != NULL)
+ {
+ addrs[sockets_created] = (struct sockaddr*) &serverAddrv6;
+ addrlens[sockets_created] = sizeof (serverAddrv6);
+ sockets_created++;
+ }
+ }
+ }
+
+ plugin->mst = GNUNET_SERVER_mst_create (&process_inbound_tokenized_messages,
+ plugin);
+ plugin->sockv4 = GNUNET_NETWORK_socket_create (PF_INET, SOCK_DGRAM, 0);
+ if (NULL == plugin->sockv4)
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
+ }
+ else
+ {
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ serverAddrv4.sin_len = sizeof (serverAddrv4);
+#endif
+ serverAddrv4.sin_family = AF_INET;
+ serverAddrv4.sin_addr.s_addr = INADDR_ANY;
+ serverAddrv4.sin_port = htons (plugin->port);
+ addrlen = sizeof (serverAddrv4);
+ serverAddr = (struct sockaddr *) &serverAddrv4;
+#if DEBUG_UDP
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Binding to IPv4 port %d\n",
+ ntohs(serverAddrv4.sin_port));
+#endif
+ tries = 0;
+ while (GNUNET_NETWORK_socket_bind (plugin->sockv4, serverAddr, addrlen)
!=
+ GNUNET_OK)
+ {
+ serverAddrv4.sin_port = htons
(GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000); /*
Find a good, non-root port */
+#if DEBUG_UDP
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "IPv4 Binding failed, trying new port %d\n",
+ ntohs(serverAddrv4.sin_port));
+#endif
+ tries++;
+ if (tries > 10)
+ {
+ GNUNET_NETWORK_socket_close (plugin->sockv4);
+ plugin->sockv4 = NULL;
+ break;
+ }
+ }
+ if (plugin->sockv4 != NULL)
+ {
+ addrs[sockets_created] = (struct sockaddr*) &serverAddrv4;
+ addrlens[sockets_created] = sizeof (serverAddrv4);
+ sockets_created++;
+ }
+ }
+
+ plugin->rs = GNUNET_NETWORK_fdset_create ();
+ GNUNET_NETWORK_fdset_zero (plugin->rs);
+ if (NULL != plugin->sockv4)
+ GNUNET_NETWORK_fdset_set (plugin->rs,
+ plugin->sockv4);
+ if (NULL != plugin->sockv6)
+ GNUNET_NETWORK_fdset_set (plugin->rs,
+ plugin->sockv6);
+
+ plugin->select_task =
+ GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
+ GNUNET_SCHEDULER_NO_TASK,
+ GNUNET_TIME_UNIT_FOREVER_REL, plugin->rs,
+ NULL, &udp_plugin_select, plugin);
+ if (sockets_created == 0)
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ _("Failed to open UDP sockets\n"));
+ plugin->nat = GNUNET_NAT_register (env->cfg,
+ GNUNET_NO,
+ port,
+ sockets_created,
+ (const struct sockaddr**) addrs, addrlens,
+ &udp_nat_port_map_callback,
+ NULL,
+ plugin);
+ return api;
+}
+
+
+/**
+ * Destroy a session, plugin is being unloaded.
+ *
+ * @param cls unused
+ * @param key hash of public key of target peer
+ * @param value a 'struct PeerSession*' to clean up
+ * @return GNUNET_OK (continue to iterate)
+ */
+static int
+destroy_session (void *cls,
+ const GNUNET_HashCode *key,
+ void *value)
+{
+ struct PeerSession *peer_session = value;
+
+ GNUNET_FRAGMENT_context_destroy (peer_session->frag);
+ GNUNET_free (peer_session);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Shutdown the plugin.
+ *
+ * @param cls our 'struct GNUNET_TRANSPORT_PluginFunctions'
+ * @return NULL
+ */
+void *
+libgnunet_plugin_transport_udp_done (void *cls)
+{
+ struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
+ struct Plugin *plugin = api->cls;
+ struct ReceiveContext *rc;
+
+ /* FIXME: clean up heap and hashmap */
+ GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions,
+ &destroy_session,
+ NULL);
+ GNUNET_CONTAINER_multihashmap_destroy (plugin->sessions);
+ plugin->sessions = NULL;
+ while (NULL != (rc = GNUNET_CONTAINER_heap_remove_root (plugin->defrags)))
+ {
+ GNUNET_DEFRAGMENT_context_destroy (rc->defrag);
+ GNUNET_free (rc);
+ }
+ GNUNET_CONTAINER_heap_destroy (plugin->defrags);
+
+ if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (plugin->select_task);
+ plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ if (plugin->sockv4 != NULL)
+ {
+ GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv4));
+ plugin->sockv4 = NULL;
+ }
+ if (plugin->sockv6 != NULL)
+ {
+ GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv6));
+ plugin->sockv6 = NULL;
+ }
+ GNUNET_SERVER_mst_destroy (plugin->mst);
+ GNUNET_NETWORK_fdset_destroy (plugin->rs);
+ GNUNET_NAT_unregister (plugin->nat);
+ plugin->nat = NULL;
+ GNUNET_free (plugin);
+ GNUNET_free (api);
+ return NULL;
+}
+
+/* end of plugin_transport_udp.c */
Deleted: gnunet/src/transport/plugin_transport_udp_new.c
===================================================================
--- gnunet/src/transport/plugin_transport_udp_new.c 2011-07-14 17:45:16 UTC
(rev 15970)
+++ gnunet/src/transport/plugin_transport_udp_new.c 2011-07-14 17:45:45 UTC
(rev 15971)
@@ -1,1620 +0,0 @@
-/*
- This file is part of GNUnet
- (C) 2010, 2011 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
- by the Free Software Foundation; either version 3, or (at your
- option) any later version.
-
- GNUnet is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
-*/
-
-/**
- * @file transport/plugin_transport_udp.c
- * @brief Implementation of the UDP NAT punching
- * transport service
- * @author Christian Grothoff
- * @author Nathan Evans
- */
-#include "platform.h"
-#include "gnunet_hello_lib.h"
-#include "gnunet_util_lib.h"
-#include "gnunet_fragmentation_lib.h"
-#include "gnunet_nat_lib.h"
-#include "gnunet_protocols.h"
-#include "gnunet_resolver_service.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_UDP GNUNET_NO
-
-/**
- * MTU for fragmentation subsystem. Should be conservative since
- * all communicating peers MUST work with this MTU.
- */
-#define UDP_MTU 1400
-
-/**
- * Number of messages we can defragment in parallel. We only really
- * defragment 1 message at a time, but if messages get re-ordered, we
- * may want to keep knowledge about the previous message to avoid
- * discarding the current message in favor of a single fragment of a
- * previous message. 3 should be good since we don't expect massive
- * message reorderings with UDP.
- */
-#define UDP_MAX_MESSAGES_IN_DEFRAG 3
-
-/**
- * We keep a defragmentation queue per sender address. How many
- * sender addresses do we support at the same time? Memory consumption
- * is roughly a factor of 32k * UDP_MAX_MESSAGES_IN_DEFRAG times this
- * value. (So 128 corresponds to 12 MB and should suffice for
- * connecting to roughly 128 peers via UDP).
- */
-#define UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG 128
-
-
-/**
- * UDP Message-Packet header (after defragmentation).
- */
-struct UDPMessage
-{
- /**
- * Message header.
- */
- struct GNUNET_MessageHeader header;
-
- /**
- * Always zero for now.
- */
- uint32_t reserved;
-
- /**
- * What is the identity of the sender
- */
- struct GNUNET_PeerIdentity sender;
-
-};
-
-
-/**
- * Network format for IPv4 addresses.
- */
-struct IPv4UdpAddress
-{
- /**
- * IPv4 address, in network byte order.
- */
- uint32_t ipv4_addr GNUNET_PACKED;
-
- /**
- * Port number, in network byte order.
- */
- uint16_t u4_port GNUNET_PACKED;
-};
-
-
-/**
- * Network format for IPv6 addresses.
- */
-struct IPv6UdpAddress
-{
-
- /**
- * IPv6 address.
- */
- struct in6_addr ipv6_addr GNUNET_PACKED;
-
- /**
- * Port number, in network byte order.
- */
- uint16_t u6_port GNUNET_PACKED;
-};
-
-
-/* Forward definition */
-struct Plugin;
-
-
-/**
- * Session with another peer.
- */
-struct PeerSession
-{
-
- /**
- * Which peer is this session for?
- */
- struct GNUNET_PeerIdentity target;
-
- /**
- * Pointer to the global plugin struct.
- */
- struct Plugin *plugin;
-
- /**
- * Address of the other peer
- */
- const struct sockaddr *sock_addr;
-
- /**
- * Function to call upon completion of the transmission.
- */
- GNUNET_TRANSPORT_TransmitContinuation cont;
-
- /**
- * Closure for 'cont'.
- */
- void *cont_cls;
-
- /**
- * Current outgoing message to this peer.
- */
- struct GNUNET_FRAGMENT_Context *frag;
-
-};
-
-
-/**
- * Data structure to track defragmentation contexts based
- * on the source of the UDP traffic.
- */
-struct ReceiveContext
-{
-
- /**
- * Defragmentation context.
- */
- struct GNUNET_DEFRAGMENT_Context *defrag;
-
- /**
- * Source address this receive context is for (allocated at the
- * end of the struct).
- */
- const struct sockaddr *src_addr;
-
- /**
- * Reference to master plugin struct.
- */
- struct Plugin *plugin;
-
- /**
- * Node in the defrag heap.
- */
- struct GNUNET_CONTAINER_HeapNode *hnode;
-
- /**
- * Length of 'src_addr'
- */
- size_t addr_len;
-
-};
-
-
-/**
- * Encapsulation of all of the state of the plugin.
- */
-struct Plugin
-{
-
- /**
- * Our environment.
- */
- struct GNUNET_TRANSPORT_PluginEnvironment *env;
-
- /**
- * Session of peers with whom we are currently connected,
- * map of peer identity to 'struct PeerSession'.
- */
- struct GNUNET_CONTAINER_MultiHashMap *sessions;
-
- /**
- * Heap with all of our defragmentation activities.
- */
- struct GNUNET_CONTAINER_Heap *defrags;
-
- /**
- * ID of select task
- */
- GNUNET_SCHEDULER_TaskIdentifier select_task;
-
- /**
- * Tokenizer for inbound messages.
- */
- struct GNUNET_SERVER_MessageStreamTokenizer *mst;
-
- /**
- * Bandwidth tracker to limit global UDP traffic.
- */
- struct GNUNET_BANDWIDTH_Tracker tracker;
-
- /**
- * Address we were told to bind to exclusively (IPv4).
- */
- char *bind4_address;
-
- /**
- * Address we were told to bind to exclusively (IPv6).
- */
- char *bind6_address;
-
- /**
- * Handle to NAT traversal support.
- */
- struct GNUNET_NAT_Handle *nat;
-
- /**
- * FD Read set
- */
- struct GNUNET_NETWORK_FDSet *rs;
-
- /**
- * The read socket for IPv4
- */
- struct GNUNET_NETWORK_Handle *sockv4;
-
- /**
- * The read socket for IPv6
- */
- struct GNUNET_NETWORK_Handle *sockv6;
-
- /**
- * expected delay for ACKs
- */
- struct GNUNET_TIME_Relative last_expected_delay;
-
- /**
- * Port we listen on.
- */
- uint16_t port;
-
- /**
- * Port we advertise on.
- */
- uint16_t aport;
-
-};
-
-
-/**
- * Lookup the session for the given peer.
- *
- * @param plugin the plugin
- * @param peer peer's identity
- * @return NULL if we have no session
- */
-struct PeerSession *
-find_session (struct Plugin *plugin,
- const struct GNUNET_PeerIdentity *peer)
-{
- return GNUNET_CONTAINER_multihashmap_get (plugin->sessions,
- &peer->hashPubKey);
-}
-
-
-/**
- * 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
-udp_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
-{
- struct Plugin *plugin = cls;
- struct PeerSession *session;
-
- session = find_session (plugin, target);
- if (NULL == session)
- return;
- GNUNET_assert (GNUNET_OK ==
- GNUNET_CONTAINER_multihashmap_remove (plugin->sessions,
- &target->hashPubKey,
- session));
- plugin->last_expected_delay = GNUNET_FRAGMENT_context_destroy
(session->frag);
- session->cont (session->cont_cls, target, GNUNET_SYSERR);
- GNUNET_free (session);
-}
-
-
-/**
- * Actually send out the message.
- *
- * @param plugin the plugin
- * @param send_handle which handle to send message on
- * @param target who should receive this message (ignored by UDP)
- * @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 UDP)
- * @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 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
- */
-static ssize_t
-udp_send (struct Plugin *plugin,
- const struct sockaddr *sa,
- const struct GNUNET_MessageHeader *msg)
-{
- ssize_t sent;
- size_t slen;
-
- switch (sa->sa_family)
- {
- case AF_INET:
- sent =
- GNUNET_NETWORK_socket_sendto (plugin->sockv4,
- msg,
- ntohs (msg->size),
- sa,
- slen = sizeof (struct sockaddr_in));
- break;
- case AF_INET6:
- sent =
- GNUNET_NETWORK_socket_sendto (plugin->sockv6,
- msg,
- ntohs (msg->size),
- sa,
- slen = sizeof (struct sockaddr_in6));
- break;
- default:
- GNUNET_break (0);
- return 0;
- }
- if (GNUNET_SYSERR == sent)
- GNUNET_log_strerror (GNUNET_ERROR_TYPE_INFO,
- "sendto");
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "UDP transmited %u-byte message to %s (%d: %s)\n",
- (unsigned int) ntohs (msg->size),
- GNUNET_a2s (sa, slen),
- (int) sent,
- (sent < 0) ? STRERROR (errno) : "ok");
-#endif
- return sent;
-}
-
-
-/**
- * Function that is called with messages created by the fragmentation
- * module. In the case of the 'proc' callback of the
- * GNUNET_FRAGMENT_context_create function, this function must
- * eventually call 'GNUNET_FRAGMENT_context_transmission_done'.
- *
- * @param cls closure, the 'struct PeerSession'
- * @param msg the message that was created
- */
-static void
-send_fragment (void *cls,
- const struct GNUNET_MessageHeader *msg)
-{
- struct PeerSession *session = cls;
-
- udp_send (session->plugin,
- session->sock_addr,
- msg);
- GNUNET_FRAGMENT_context_transmission_done (session->frag);
-}
-
-
-/**
- * Function that can be used by the transport service to transmit
- * a message using the plugin.
- *
- * @param cls closure
- * @param target who should receive this message (ignored by UDP)
- * @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 UDP)
- * @param timeout when should we time out (give up) if we can not transmit?
- * @param session identifier used for this session (NULL for UDP)
- * @param addr the addr to send the message to
- * @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 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 (may return 0 and the message can
- * still be transmitted later!)
- */
-static ssize_t
-udp_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 Plugin *plugin = cls;
- struct PeerSession *peer_session;
- const struct IPv4UdpAddress *t4;
- const struct IPv6UdpAddress *t6;
- struct sockaddr_in *v4;
- struct sockaddr_in6 *v6;
- size_t mlen = msgbuf_size + sizeof (struct UDPMessage);
- char mbuf[mlen];
- struct UDPMessage *udp;
-
- if (force_address == GNUNET_SYSERR)
- return GNUNET_SYSERR;
- GNUNET_assert (NULL == session);
- if (mlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
- {
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
- switch (addrlen)
- {
- case sizeof(struct IPv4UdpAddress):
- t4 = addr;
- peer_session = GNUNET_malloc (sizeof (struct PeerSession) + sizeof
(struct sockaddr_in));
- v4 = (struct sockaddr_in*) &peer_session[1];
- v4->sin_family = AF_INET;
-#if HAVE_SOCKADDR_IN_SIN_LEN
- v4->sin_len = sizeof (struct sockaddr_in);
-#endif
- v4->sin_port = t4->u4_port;
- v4->sin_addr.s_addr = t4->ipv4_addr;
- break;
- case sizeof(struct IPv6UdpAddress):
- t6 = addr;
- peer_session = GNUNET_malloc (sizeof (struct PeerSession) + sizeof
(struct sockaddr_in6));
- v6 = (struct sockaddr_in6*) &peer_session[1];
- v6->sin6_family = AF_INET6;
-#if HAVE_SOCKADDR_IN_SIN_LEN
- v6->sin6_len = sizeof (struct sockaddr_in6);
-#endif
- v6->sin6_port = t6->u6_port;
- v6->sin6_addr = t6->ipv6_addr;
- break;
- default:
- /* Must have a valid address to send to */
- GNUNET_break_op(0);
- return GNUNET_SYSERR;
- }
- udp = (struct UDPMessage*) mbuf;
- udp->header.size = htons (mlen);
- udp->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE);
- udp->reserved = htonl (0);
- udp->sender = *plugin->env->my_identity;
- memcpy (&udp[1], msgbuf, msgbuf_size);
- peer_session->target = *target;
- peer_session->plugin = plugin;
- peer_session->sock_addr = (const struct sockaddr*) &peer_session[1];
- peer_session->cont = cont;
- peer_session->cont_cls = cont_cls;
- if (mlen <= UDP_MTU)
- {
- mlen = udp_send (plugin,
- peer_session->sock_addr,
- &udp->header);
- cont (cont_cls, target, (mlen > 0) ? GNUNET_OK : GNUNET_SYSERR);
- GNUNET_free (peer_session);
- }
- else
- {
- GNUNET_assert (GNUNET_OK ==
- GNUNET_CONTAINER_multihashmap_put (plugin->sessions,
- &target->hashPubKey,
- peer_session,
-
GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
- peer_session->frag = GNUNET_FRAGMENT_context_create (plugin->env->stats,
- UDP_MTU,
- &plugin->tracker,
-
plugin->last_expected_delay,
- &udp->header,
- &send_fragment,
- peer_session);
- }
- return mlen;
-}
-
-
-/**
- * Closure for 'process_inbound_tokenized_messages'
- */
-struct SourceInformation
-{
- /**
- * Sender identity.
- */
- struct GNUNET_PeerIdentity sender;
-
- /**
- * Source address.
- */
- const void *arg;
-
- /**
- * Number of bytes in source address.
- */
- size_t args;
-};
-
-
-/**
- * Message tokenizer has broken up an incomming message. Pass it on
- * to the service.
- *
- * @param cls the 'struct Plugin'
- * @param client the 'struct SourceInformation'
- * @param hdr the actual message
- */
-static void
-process_inbound_tokenized_messages (void *cls,
- void *client,
- const struct GNUNET_MessageHeader *hdr)
-{
- struct Plugin *plugin = cls;
- struct SourceInformation* si = client;
- struct GNUNET_TRANSPORT_ATS_Information distance[2];
-
- /* setup ATS */
- 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);
-
- plugin->env->receive (plugin->env->cls,
- &si->sender,
- hdr,
- distance, 2,
- NULL,
- si->arg, si->args);
-}
-
-
-/**
- * We've received a UDP Message. Process it (pass contents to main service).
- *
- * @param plugin plugin context
- * @param msg the message
- * @param sender_addr sender address
- * @param sender_addr_len number of bytes in sender_addr
- */
-static void
-process_udp_message (struct Plugin *plugin,
- const struct UDPMessage *msg,
- const struct sockaddr *sender_addr,
- socklen_t sender_addr_len)
-{
- struct SourceInformation si;
- struct IPv4UdpAddress u4;
- struct IPv6UdpAddress u6;
- const void *arg;
- size_t args;
-
- if (0 != ntohl (msg->reserved))
- {
- GNUNET_break_op (0);
- return;
- }
- if (ntohs (msg->header.size) < sizeof (struct GNUNET_MessageHeader) + sizeof
(struct UDPMessage))
- {
- GNUNET_break_op (0);
- return;
- }
-
- /* convert address */
- switch (sender_addr->sa_family)
- {
- case AF_INET:
- GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in));
- u4.ipv4_addr = ((struct sockaddr_in *) sender_addr)->sin_addr.s_addr;
- u4.u4_port = ((struct sockaddr_in *) sender_addr)->sin_port;
- arg = &u4;
- args = sizeof (u4);
- break;
- case AF_INET6:
- GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in6));
- u6.ipv6_addr = ((struct sockaddr_in6*) sender_addr)->sin6_addr;
- u6.u6_port = ((struct sockaddr_in6 *) sender_addr)->sin6_port;
- arg = &u6;
- args = sizeof (u6);
- break;
- default:
- GNUNET_break (0);
- return;
- }
-#if DEBUG_UDP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "udp",
- "Received message with %u bytes from peer `%s' at `%s'\n",
- (unsigned int) ntohs (msg->header.size),
- GNUNET_i2s (&msg->sender),
- GNUNET_a2s (sender_addr, sender_addr_len));
-#endif
-
- /* iterate over all embedded messages */
- si.sender = msg->sender;
- si.arg = arg;
- si.args = args;
- GNUNET_SERVER_mst_receive (plugin->mst,
- &si,
- (const char*) &msg[1],
- ntohs (msg->header.size) - sizeof (struct
UDPMessage),
- GNUNET_YES,
- GNUNET_NO);
-}
-
-
-/**
- * Process a defragmented message.
- *
- * @param cls the 'struct ReceiveContext'
- * @param msg the message
- */
-static void
-fragment_msg_proc (void *cls,
- const struct GNUNET_MessageHeader *msg)
-{
- struct ReceiveContext *rc = cls;
-
- if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE)
- {
- GNUNET_break (0);
- return;
- }
- if (ntohs (msg->size) < sizeof(struct UDPMessage))
- {
- GNUNET_break (0);
- return;
- }
- process_udp_message (rc->plugin,
- (const struct UDPMessage*) msg,
- rc->src_addr,
- rc->addr_len);
-}
-
-
-/**
- * Transmit an acknowledgement.
- *
- * @param cls the 'struct ReceiveContext'
- * @param id message ID (unused)
- * @param msg ack to transmit
- */
-static void
-ack_proc (void *cls,
- uint32_t id,
- const struct GNUNET_MessageHeader *msg)
-{
- struct ReceiveContext *rc = cls;
- size_t msize = sizeof (struct UDPMessage) + ntohs (msg->size);
- char buf[msize];
- struct UDPMessage *udp;
-
-#if DEBUG_UDP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "udp",
- "Sending ACK to `%s'\n",
- GNUNET_a2s (rc->src_addr,
- (rc->src_addr->sa_family == AF_INET)
- ? sizeof (struct sockaddr_in)
- : sizeof (struct sockaddr_in6)));
-#endif
- udp = (struct UDPMessage*) buf;
- udp->header.size = htons ((uint16_t) msize);
- udp->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK);
- udp->reserved = htonl (0);
- udp->sender = *rc->plugin->env->my_identity;
- memcpy (&udp[1], msg, ntohs (msg->size));
- (void) udp_send (rc->plugin,
- rc->src_addr,
- &udp->header);
-}
-
-
-/**
- * Closure for 'find_receive_context'.
- */
-struct FindReceiveContext
-{
- /**
- * Where to store the result.
- */
- struct ReceiveContext *rc;
-
- /**
- * Address to find.
- */
- const struct sockaddr *addr;
-
- /**
- * Number of bytes in 'addr'.
- */
- socklen_t addr_len;
-};
-
-
-/**
- * Scan the heap for a receive context with the given address.
- *
- * @param cls the 'struct FindReceiveContext'
- * @param node internal node of the heap
- * @param element value stored at the node (a 'struct ReceiveContext')
- * @param cost cost associated with the node
- * @return GNUNET_YES if we should continue to iterate,
- * GNUNET_NO if not.
- */
-static int
-find_receive_context (void *cls,
- struct GNUNET_CONTAINER_HeapNode *node,
- void *element,
- GNUNET_CONTAINER_HeapCostType cost)
-{
- struct FindReceiveContext *frc = cls;
- struct ReceiveContext *e = element;
-
- if ( (frc->addr_len == e->addr_len) &&
- (0 == memcmp (frc->addr,
- e->src_addr,
- frc->addr_len) ) )
- {
- frc->rc = e;
- return GNUNET_NO;
- }
- return GNUNET_YES;
-}
-
-
-/**
- * Read and process a message from the given socket.
- *
- * @param plugin the overall plugin
- * @param rsock socket to read from
- */
-static void
-udp_read (struct Plugin *plugin,
- struct GNUNET_NETWORK_Handle *rsock)
-{
- socklen_t fromlen;
- char addr[32];
- char buf[65536];
- ssize_t ret;
- const struct GNUNET_MessageHeader *msg;
- const struct GNUNET_MessageHeader *ack;
- struct PeerSession *peer_session;
- const struct UDPMessage *udp;
- struct ReceiveContext *rc;
- struct GNUNET_TIME_Absolute now;
- struct FindReceiveContext frc;
-
- fromlen = sizeof (addr);
- memset (&addr, 0, sizeof(addr));
- ret = GNUNET_NETWORK_socket_recvfrom (rsock, buf, sizeof (buf),
- (struct sockaddr *)&addr, &fromlen);
- if (ret < sizeof (struct GNUNET_MessageHeader))
- {
- GNUNET_break_op (0);
- return;
- }
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "UDP received %u-byte message from `%s'\n",
- (unsigned int) ret,
- GNUNET_a2s ((const struct sockaddr*) addr, fromlen));
-#endif
- msg = (const struct GNUNET_MessageHeader *) buf;
- if (ret != ntohs (msg->size))
- {
- GNUNET_break_op (0);
- return;
- }
- switch (ntohs (msg->type))
- {
- case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE:
- if (ntohs (msg->size) < sizeof (struct UDPMessage))
- {
- GNUNET_break_op (0);
- return;
- }
- process_udp_message (plugin,
- (const struct UDPMessage *) msg,
- (const struct sockaddr*) addr,
- fromlen);
- return;
- case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK:
- if (ntohs (msg->size) < sizeof (struct UDPMessage) + sizeof (struct
GNUNET_MessageHeader))
- {
- GNUNET_break_op (0);
- return;
- }
- udp = (const struct UDPMessage *) msg;
- if (ntohl (udp->reserved) != 0)
- {
- GNUNET_break_op (0);
- return;
- }
- ack = (const struct GNUNET_MessageHeader*) &udp[1];
- if (ntohs (ack->size) != ntohs (msg->size) - sizeof (struct UDPMessage))
- {
- GNUNET_break_op (0);
- return;
- }
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "UDP processes %u-byte acknowledgement from `%s' at `%s'\n",
- (unsigned int) ntohs (msg->size),
- GNUNET_i2s (&udp->sender),
- GNUNET_a2s ((const struct sockaddr*) addr, fromlen));
-#endif
-
- peer_session = find_session (plugin, &udp->sender);
- if (NULL == peer_session)
- {
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Session for ACK not found, dropping ACK!\n");
-#endif
- return;
- }
- if (GNUNET_OK !=
- GNUNET_FRAGMENT_process_ack (peer_session->frag,
- ack))
- return;
- GNUNET_assert (GNUNET_OK ==
- GNUNET_CONTAINER_multihashmap_remove (plugin->sessions,
-
&udp->sender.hashPubKey,
- peer_session));
- GNUNET_FRAGMENT_context_destroy (peer_session->frag);
- peer_session->cont (peer_session->cont_cls,
- &udp->sender,
- GNUNET_OK);
- GNUNET_free (peer_session);
- return;
- case GNUNET_MESSAGE_TYPE_FRAGMENT:
- frc.rc = NULL;
- frc.addr = (const struct sockaddr*) addr;
- frc.addr_len = fromlen;
- GNUNET_CONTAINER_heap_iterate (plugin->defrags,
- &find_receive_context,
- &frc);
- now = GNUNET_TIME_absolute_get ();
- rc = frc.rc;
- if (rc == NULL)
- {
- /* need to create a new RC */
- rc = GNUNET_malloc (sizeof (struct ReceiveContext) + fromlen);
- memcpy (&rc[1], addr, fromlen);
- rc->src_addr = (const struct sockaddr*) &rc[1];
- rc->addr_len = fromlen;
- rc->plugin = plugin;
- rc->defrag = GNUNET_DEFRAGMENT_context_create (plugin->env->stats,
- UDP_MTU,
-
UDP_MAX_MESSAGES_IN_DEFRAG,
- rc,
- &fragment_msg_proc,
- &ack_proc);
- rc->hnode = GNUNET_CONTAINER_heap_insert (plugin->defrags,
- rc,
-
(GNUNET_CONTAINER_HeapCostType) now.abs_value);
- }
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "UDP processes %u-byte fragment from `%s'\n",
- (unsigned int) ntohs (msg->size),
- GNUNET_a2s ((const struct sockaddr*) addr, fromlen));
-#endif
-
- if (GNUNET_OK ==
- GNUNET_DEFRAGMENT_process_fragment (rc->defrag,
- msg))
- {
- /* keep this 'rc' from expiring */
- GNUNET_CONTAINER_heap_update_cost (plugin->defrags,
- rc->hnode,
- (GNUNET_CONTAINER_HeapCostType)
now.abs_value);
- }
- if (GNUNET_CONTAINER_heap_get_size (plugin->defrags) >
UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG)
- {
- /* remove 'rc' that was inactive the longest */
- rc = GNUNET_CONTAINER_heap_remove_root (plugin->defrags);
- GNUNET_DEFRAGMENT_context_destroy (rc->defrag);
- GNUNET_free (rc);
- }
- return;
- default:
- GNUNET_break_op (0);
- return;
- }
-}
-
-
-/**
- * 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
-udp_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 (GNUNET_NETWORK_fdset_isset (tc->read_ready,
- plugin->sockv4))
- udp_read (plugin, plugin->sockv4);
- if (GNUNET_NETWORK_fdset_isset (tc->read_ready,
- plugin->sockv6))
- udp_read (plugin, plugin->sockv6);
- plugin->select_task =
- GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
- GNUNET_SCHEDULER_NO_TASK,
- GNUNET_TIME_UNIT_FOREVER_REL, plugin->rs,
- NULL, &udp_plugin_select, plugin);
-
-}
-
-
-/**
- * Check if the given port is plausible (must be either our listen
- * port or our advertised port). If it is neither, we return
- * GNUNET_SYSERR.
- *
- * @param plugin global variables
- * @param in_port port number to check
- * @return GNUNET_OK if port is either open_port or adv_port
- */
-static int
-check_port (struct Plugin *plugin, uint16_t in_port)
-{
- if ( (in_port == plugin->port) ||
- (in_port == plugin->aport) )
- return GNUNET_OK;
- return GNUNET_SYSERR;
-}
-
-
-/**
- * Function that will be called to check if a binary address for this
- * plugin is well-formed and corresponds to an address for THIS peer
- * (as per our configuration). Naturally, if absolutely necessary,
- * plugins can be a bit conservative in their answer, but in general
- * plugins should make sure that the address does not redirect
- * traffic to a 3rd party that might try to man-in-the-middle our
- * traffic.
- *
- * @param cls closure, should be our handle to the Plugin
- * @param addr pointer to the address
- * @param addrlen length of addr
- * @return GNUNET_OK if this is a plausible address for this peer
- * and transport, GNUNET_SYSERR if not
- *
- */
-static int
-udp_plugin_check_address (void *cls,
- const void *addr,
- size_t addrlen)
-{
- struct Plugin *plugin = cls;
- struct IPv4UdpAddress *v4;
- struct IPv6UdpAddress *v6;
-
- if ((addrlen != sizeof (struct IPv4UdpAddress)) &&
- (addrlen != sizeof (struct IPv6UdpAddress)))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if (addrlen == sizeof (struct IPv4UdpAddress))
- {
- v4 = (struct IPv4UdpAddress *) addr;
- if (GNUNET_OK !=
- check_port (plugin, ntohs (v4->u4_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 IPv6UdpAddress *) addr;
- if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if (GNUNET_OK !=
- check_port (plugin, ntohs (v6->u6_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;
-}
-
-
-/**
- * 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
- * to override the address again.
- *
- * @param cls closure
- * @param addr binary address
- * @param addrlen length of the address
- * @return string representing the same address
- */
-static const char*
-udp_address_to_string (void *cls,
- const void *addr,
- size_t addrlen)
-{
- static char rbuf[INET6_ADDRSTRLEN + 10];
- char buf[INET6_ADDRSTRLEN];
- const void *sb;
- struct in_addr a4;
- struct in6_addr a6;
- const struct IPv4UdpAddress *t4;
- const struct IPv6UdpAddress *t6;
- int af;
- uint16_t port;
-
- if (addrlen == sizeof (struct IPv6UdpAddress))
- {
- t6 = addr;
- af = AF_INET6;
- port = ntohs (t6->u6_port);
- memcpy (&a6, &t6->ipv6_addr, sizeof (a6));
- sb = &a6;
- }
- else if (addrlen == sizeof (struct IPv4UdpAddress))
- {
- t4 = addr;
- af = AF_INET;
- port = ntohs (t4->u4_port);
- memcpy (&a4, &t4->ipv4_addr, sizeof (a4));
- sb = &a4;
- }
- else
- {
- GNUNET_break_op (0);
- return NULL;
- }
- inet_ntop (af, sb, buf, INET6_ADDRSTRLEN);
- GNUNET_snprintf (rbuf,
- sizeof (rbuf),
- "%s:%u",
- buf,
- port);
- return rbuf;
-}
-
-
-/**
- * Closure for 'append_port'.
- */
-struct PrettyPrinterContext
-{
- /**
- * Function to call with the result.
- */
- GNUNET_TRANSPORT_AddressStringCallback asc;
-
- /**
- * Clsoure for 'asc'.
- */
- void *asc_cls;
-
- /**
- * Port to add after the IP address.
- */
- uint16_t port;
-};
-
-
-/**
- * Append our port and forward the result.
- *
- * @param cls a 'struct PrettyPrinterContext'
- * @param hostname result from DNS resolver
- */
-static void
-append_port (void *cls, const char *hostname)
-{
- struct PrettyPrinterContext *ppc = cls;
- char *ret;
-
- if (hostname == NULL)
- {
- ppc->asc (NULL, ret);
- 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 cls closure
- * @param type name of the transport that generated the address
- * @param addr one of the addresses of the host, NULL for the last address
- * the specific address format depends on the transport
- * @param addrlen length of the address
- * @param numeric should (IP) addresses be displayed in numeric form?
- * @param timeout after how long should we give up?
- * @param asc function to call on each string
- * @param asc_cls closure for asc
- */
-static void
-udp_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;
-#if HAVE_SOCKADDR_IN_SIN_LEN
- a6.sin6_len = sizeof (a6);
-#endif
- 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;
-#if HAVE_SOCKADDR_IN_SIN_LEN
- a4.sin_len = sizeof (a4);
-#endif
- a4.sin_port = u4->u4_port;
- a4.sin_addr.s_addr = u4->ipv4_addr;
- port = ntohs (u4->u4_port);
- sb = &a4;
- sbs = sizeof (a4);
- }
- 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);
-}
-
-
-/**
- * Our external IP address/port mapping has changed.
- *
- * @param cls closure, the 'struct LocalAddrList'
- * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO
to mean
- * the previous (now invalid) one
- * @param addr either the previous or the new public IP address
- * @param addrlen actual lenght of the address
- */
-static void
-udp_nat_port_map_callback (void *cls,
- int add_remove,
- const struct sockaddr *addr,
- socklen_t addrlen)
-{
- struct Plugin *plugin = cls;
- struct IPv4UdpAddress u4;
- struct IPv6UdpAddress u6;
- void *arg;
- size_t args;
-
- /* convert 'addr' to our internal format */
- switch (addr->sa_family)
- {
- case AF_INET:
- GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
- u4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
- u4.u4_port = ((struct sockaddr_in *) addr)->sin_port;
- arg = &u4;
- args = sizeof (u4);
- break;
- case AF_INET6:
- GNUNET_assert (addrlen == sizeof (struct sockaddr_in6));
- memcpy (&u6.ipv6_addr,
- &((struct sockaddr_in6 *) addr)->sin6_addr,
- sizeof (struct in6_addr));
- u6.u6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
- arg = &u6;
- args = sizeof (u6);
- break;
- default:
- GNUNET_break (0);
- return;
- }
- /* modify our published address list */
- plugin->env->notify_address (plugin->env->cls,
- add_remove,
- arg, args);
-}
-
-
-/**
- * The exported method. Makes the core api available via a global and
- * returns the udp transport API.
- *
- * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
- * @return our 'struct GNUNET_TRANSPORT_PluginFunctions'
- */
-void *
-libgnunet_plugin_transport_udp_init (void *cls)
-{
- struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
- unsigned long long port;
- unsigned long long aport;
- struct GNUNET_TRANSPORT_PluginFunctions *api;
- struct Plugin *plugin;
- int sockets_created;
- struct sockaddr_in serverAddrv4;
- struct sockaddr_in6 serverAddrv6;
- struct sockaddr *serverAddr;
- struct sockaddr *addrs[2];
- socklen_t addrlens[2];
- socklen_t addrlen;
- unsigned int tries;
- unsigned long long udp_max_bps;
-
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_number (env->cfg,
- "transport-udp",
- "PORT",
- &port))
- port = 2086;
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_number (env->cfg,
- "transport-udp",
- "MAX_BPS",
- &udp_max_bps))
- udp_max_bps = 1024 * 1024 * 100; /* 100 MB/s == infinity for practical
purposes */
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_number (env->cfg,
- "transport-udp",
- "ADVERTISED_PORT",
- &aport))
- aport = port;
- if (port > 65535)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Given `%s' option is out of range: %llu > %u\n"),
- "PORT",
- port,
- 65535);
- return NULL;
- }
- memset (&serverAddrv6, 0, sizeof (serverAddrv6));
- memset (&serverAddrv4, 0, sizeof (serverAddrv4));
-
- plugin = GNUNET_malloc (sizeof (struct Plugin));
- GNUNET_BANDWIDTH_tracker_init (&plugin->tracker,
- GNUNET_BANDWIDTH_value_init ((uint32_t)
udp_max_bps),
- 30);
- plugin->last_expected_delay = GNUNET_TIME_UNIT_SECONDS;
- plugin->port = port;
- plugin->aport = aport;
- plugin->env = env;
- api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
- api->cls = plugin;
-
- api->send = &udp_plugin_send;
- api->disconnect = &udp_disconnect;
- api->address_pretty_printer = &udp_plugin_address_pretty_printer;
- api->address_to_string = &udp_address_to_string;
- api->check_address = &udp_plugin_check_address;
-
- if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_string(env->cfg,
- "transport-udp",
- "BINDTO",
-
&plugin->bind4_address))
- {
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Binding udp plugin to specific address: `%s'\n",
- plugin->bind4_address);
- if (1 != inet_pton(AF_INET,
- plugin->bind4_address,
- &serverAddrv4.sin_addr))
- {
- GNUNET_free (plugin->bind4_address);
- GNUNET_free (plugin);
- return NULL;
- }
- }
-
- if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_string(env->cfg,
- "transport-udp",
- "BINDTO6",
-
&plugin->bind6_address))
- {
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Binding udp plugin to specific address: `%s'\n",
- plugin->bind6_address);
- if (1 != inet_pton(AF_INET6,
- plugin->bind6_address,
- &serverAddrv6.sin6_addr))
- {
- GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
- _("Invalid IPv6 address: `%s'\n"),
- plugin->bind6_address);
- GNUNET_free_non_null (plugin->bind4_address);
- GNUNET_free (plugin->bind6_address);
- GNUNET_free (plugin);
- return NULL;
- }
- }
-
- plugin->defrags = GNUNET_CONTAINER_heap_create
(GNUNET_CONTAINER_HEAP_ORDER_MIN);
- plugin->sessions = GNUNET_CONTAINER_multihashmap_create
(UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG * 2);
- sockets_created = 0;
- if ( (GNUNET_YES !=
- GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
- "nat",
- "DISABLEV6")))
- {
- plugin->sockv6 = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_DGRAM, 0);
- if (NULL == plugin->sockv6)
- {
- GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
- }
- else
- {
-#if HAVE_SOCKADDR_IN_SIN_LEN
- serverAddrv6.sin6_len = sizeof (serverAddrv6);
-#endif
- serverAddrv6.sin6_family = AF_INET6;
- serverAddrv6.sin6_addr = in6addr_any;
- serverAddrv6.sin6_port = htons (plugin->port);
- addrlen = sizeof (serverAddrv6);
- serverAddr = (struct sockaddr *) &serverAddrv6;
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Binding to IPv6 port %d\n",
- ntohs(serverAddrv6.sin6_port));
-#endif
- tries = 0;
- while (GNUNET_NETWORK_socket_bind (plugin->sockv6,
- serverAddr, addrlen) !=
- GNUNET_OK)
- {
- serverAddrv6.sin6_port
- = htons (GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_STRONG,
33537) + 32000); /* Find a good, non-root port */
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "IPv6 Binding failed, trying new port %d\n",
- ntohs(serverAddrv6.sin6_port));
-#endif
- tries++;
- if (tries > 10)
- {
- GNUNET_NETWORK_socket_close (plugin->sockv6);
- plugin->sockv6 = NULL;
- break;
- }
- }
- if (plugin->sockv6 != NULL)
- {
- addrs[sockets_created] = (struct sockaddr*) &serverAddrv6;
- addrlens[sockets_created] = sizeof (serverAddrv6);
- sockets_created++;
- }
- }
- }
-
- plugin->mst = GNUNET_SERVER_mst_create (&process_inbound_tokenized_messages,
- plugin);
- plugin->sockv4 = GNUNET_NETWORK_socket_create (PF_INET, SOCK_DGRAM, 0);
- if (NULL == plugin->sockv4)
- {
- GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
- }
- else
- {
-#if HAVE_SOCKADDR_IN_SIN_LEN
- serverAddrv4.sin_len = sizeof (serverAddrv4);
-#endif
- serverAddrv4.sin_family = AF_INET;
- serverAddrv4.sin_addr.s_addr = INADDR_ANY;
- serverAddrv4.sin_port = htons (plugin->port);
- addrlen = sizeof (serverAddrv4);
- serverAddr = (struct sockaddr *) &serverAddrv4;
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Binding to IPv4 port %d\n",
- ntohs(serverAddrv4.sin_port));
-#endif
- tries = 0;
- while (GNUNET_NETWORK_socket_bind (plugin->sockv4, serverAddr, addrlen)
!=
- GNUNET_OK)
- {
- serverAddrv4.sin_port = htons
(GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000); /*
Find a good, non-root port */
-#if DEBUG_UDP
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "IPv4 Binding failed, trying new port %d\n",
- ntohs(serverAddrv4.sin_port));
-#endif
- tries++;
- if (tries > 10)
- {
- GNUNET_NETWORK_socket_close (plugin->sockv4);
- plugin->sockv4 = NULL;
- break;
- }
- }
- if (plugin->sockv4 != NULL)
- {
- addrs[sockets_created] = (struct sockaddr*) &serverAddrv4;
- addrlens[sockets_created] = sizeof (serverAddrv4);
- sockets_created++;
- }
- }
-
- plugin->rs = GNUNET_NETWORK_fdset_create ();
- GNUNET_NETWORK_fdset_zero (plugin->rs);
- if (NULL != plugin->sockv4)
- GNUNET_NETWORK_fdset_set (plugin->rs,
- plugin->sockv4);
- if (NULL != plugin->sockv6)
- GNUNET_NETWORK_fdset_set (plugin->rs,
- plugin->sockv6);
-
- plugin->select_task =
- GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
- GNUNET_SCHEDULER_NO_TASK,
- GNUNET_TIME_UNIT_FOREVER_REL, plugin->rs,
- NULL, &udp_plugin_select, plugin);
- if (sockets_created == 0)
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Failed to open UDP sockets\n"));
- plugin->nat = GNUNET_NAT_register (env->cfg,
- GNUNET_NO,
- port,
- sockets_created,
- (const struct sockaddr**) addrs, addrlens,
- &udp_nat_port_map_callback,
- NULL,
- plugin);
- return api;
-}
-
-
-/**
- * Destroy a session, plugin is being unloaded.
- *
- * @param cls unused
- * @param key hash of public key of target peer
- * @param value a 'struct PeerSession*' to clean up
- * @return GNUNET_OK (continue to iterate)
- */
-static int
-destroy_session (void *cls,
- const GNUNET_HashCode *key,
- void *value)
-{
- struct PeerSession *peer_session = value;
-
- GNUNET_FRAGMENT_context_destroy (peer_session->frag);
- GNUNET_free (peer_session);
- return GNUNET_OK;
-}
-
-
-/**
- * Shutdown the plugin.
- *
- * @param cls our 'struct GNUNET_TRANSPORT_PluginFunctions'
- * @return NULL
- */
-void *
-libgnunet_plugin_transport_udp_done (void *cls)
-{
- struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
- struct Plugin *plugin = api->cls;
- struct ReceiveContext *rc;
-
- /* FIXME: clean up heap and hashmap */
- GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions,
- &destroy_session,
- NULL);
- GNUNET_CONTAINER_multihashmap_destroy (plugin->sessions);
- plugin->sessions = NULL;
- while (NULL != (rc = GNUNET_CONTAINER_heap_remove_root (plugin->defrags)))
- {
- GNUNET_DEFRAGMENT_context_destroy (rc->defrag);
- GNUNET_free (rc);
- }
- GNUNET_CONTAINER_heap_destroy (plugin->defrags);
-
- if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
- {
- GNUNET_SCHEDULER_cancel (plugin->select_task);
- plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
- }
- if (plugin->sockv4 != NULL)
- {
- GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv4));
- plugin->sockv4 = NULL;
- }
- if (plugin->sockv6 != NULL)
- {
- GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv6));
- plugin->sockv6 = NULL;
- }
- GNUNET_SERVER_mst_destroy (plugin->mst);
- GNUNET_NETWORK_fdset_destroy (plugin->rs);
- GNUNET_NAT_unregister (plugin->nat);
- plugin->nat = NULL;
- GNUNET_free (plugin);
- GNUNET_free (api);
- return NULL;
-}
-
-/* end of plugin_transport_udp.c */
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- [GNUnet-SVN] r15971 - gnunet/src/transport,
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