/**
* @file transport/plugin_transport_udp.c
- * @brief Implementation of the UDP NAT punching
- * transport service
+ * @brief Implementation of the UDP transport protocol
* @author Christian Grothoff
* @author Nathan Evans
+ * @author Matthias Wachs
*/
#include "platform.h"
+#include "plugin_transport_udp_new.h"
#include "gnunet_hello_lib.h"
#include "gnunet_util_lib.h"
#include "gnunet_fragmentation_lib.h"
#define LOG(kind,...) GNUNET_log_from (kind, "transport-udp", __VA_ARGS__)
-#define DEBUG_UDP GNUNET_EXTRA_LOGGING
-
-/**
- * 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
-
-
-GNUNET_NETWORK_STRUCT_BEGIN
-
-/**
- * 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;
-
-};
-
-
/**
- * UDP ACK Message-Packet header (after defragmentation).
- */
-struct UDP_ACK_Message
-{
- /**
- * Message header.
- */
- struct GNUNET_MessageHeader header;
-
- /**
- * Desired delay for flow control
- */
- uint32_t delay;
-
- /**
- * 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;
-};
-GNUNET_NETWORK_STRUCT_END
-
-/* Forward definition */
-struct Plugin;
-
-
-/**
- * Session with another peer. FIXME: why not make this into
- * a regular 'struct Session' and pass it around!?
- */
-struct Session
-{
-
- /**
- * Which peer is this session for or from?
- */
- struct GNUNET_PeerIdentity target;
-
- /**
- * Pointer to the global plugin struct.
- */
- struct Plugin *plugin;
-
- /**
- * Address of the other peer
- */
- const struct sockaddr *sock_addr;
-
- size_t addrlen;
-
- /**
- * 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;
-
- /*
- * Is this a reliable, bidirectional connection?
- * YES if we already received a message with this session
- */
- int bidirectional;
-
- /*
- * Task invalidating this session if idle
- */
- GNUNET_SCHEDULER_TaskIdentifier invalidation_task;
-
- /*
- * Desired delay for next sending we send to other peer
- */
- struct GNUNET_TIME_Relative flow_delay_for_other_peer;
-
- /*
- * Desired delay for next sending we received from other peer
- */
- struct GNUNET_TIME_Absolute flow_delay_from_other_peer;
-};
-
-/**
- * Encapsulation of all of the state of the plugin.
+ * Closure for 'append_port'.
*/
-struct Plugin
+struct PrettyPrinterContext
{
-
- /**
- * 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.
+ * Function to call with the result.
*/
- uint16_t port;
+ GNUNET_TRANSPORT_AddressStringCallback asc;
/**
- * Port we advertise on.
- */
- uint16_t aport;
-
-};
-
-int
-delete_session_iterator (void *cls, const GNUNET_HashCode * key, void *value)
-{
- struct Session *s = (struct Session *) value;
-
- if (s->invalidation_task != GNUNET_SCHEDULER_NO_TASK)
- {
- GNUNET_SCHEDULER_cancel (s->invalidation_task);
- s->invalidation_task = GNUNET_SCHEDULER_NO_TASK;
- }
- GNUNET_CONTAINER_multihashmap_remove (s->plugin->sessions, key, s);
-
- GNUNET_free (s);
- return GNUNET_YES;
-}
-
-/**
- * Disconnect from a remote node. Clean up session if we have one for this peer
- *
- * @param cls closure for this call (should be handle to Plugin)
- * @param target the peeridentity of the peer to disconnect
- * @return GNUNET_OK on success, GNUNET_SYSERR if the operation failed
- */
-static void
-udp_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
-{
- struct Plugin *plugin = cls;
-
- GNUNET_CONTAINER_multihashmap_get_multiple (plugin, &target->hashPubKey,
- &delete_session_iterator, NULL);
-
-}
-
-
-/**
- * Actually send out the message.
- *
- * @param plugin the plugin
- * @param sa the address to send the message to
- * @param msg message to transmit
- * @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:
- if (NULL == plugin->sockv4)
- return 0;
- sent =
- GNUNET_NETWORK_socket_sendto (plugin->sockv4, msg, ntohs (msg->size),
- sa, slen = sizeof (struct sockaddr_in));
- break;
- case AF_INET6:
- if (NULL == plugin->sockv6)
- return 0;
- 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_ERROR, "sendto");
- LOG (GNUNET_ERROR_TYPE_ERROR,
- "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");
-
- }
- 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");
- return sent;
-}
-
-
-static struct Session *
-create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
- const void *addr, size_t addrlen,
- GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
-{
- struct Session *s;
- const struct IPv4UdpAddress *t4;
- const struct IPv6UdpAddress *t6;
- struct sockaddr_in *v4;
- struct sockaddr_in6 *v6;
- size_t len;
-
- switch (addrlen)
- {
- case sizeof (struct IPv4UdpAddress):
- if (NULL == plugin->sockv4)
- {
- return NULL;
- }
- t4 = addr;
- s = GNUNET_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in));
- len = sizeof (struct sockaddr_in);
- v4 = (struct sockaddr_in *) &s[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):
- if (NULL == plugin->sockv6)
- {
- return NULL;
- }
- t6 = addr;
- s = GNUNET_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in6));
- len = sizeof (struct sockaddr_in6);
- v6 = (struct sockaddr_in6 *) &s[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 NULL;
- }
-
- s->valid_until = GNUNET_TIME_absolute_get_zero ();
- s->flow_delay_for_other_peer = GNUNET_TIME_relative_get_zero ();
- s->flow_delay_from_other_peer = GNUNET_TIME_absolute_get_zero ();
- s->bidirectional = GNUNET_NO;
- s->invalidation_task = GNUNET_SCHEDULER_NO_TASK;
- s->addrlen = len;
- s->target = *target;
- s->plugin = plugin;
- s->sock_addr = (const struct sockaddr *) &s[1];
- s->cont = cont;
- s->cont_cls = cont_cls;
-
- return s;
-}
-
-static void
-invalidation_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct Session *s = cls;
-
- s->invalidation_task = GNUNET_SCHEDULER_NO_TASK;
- LOG (GNUNET_ERROR_TYPE_ERROR, "Session %X (`%s') is now invalid\n", s,
- GNUNET_a2s (s->sock_addr, s->addrlen));
-
- s->plugin->env->session_end (s->plugin->env->cls, &s->target, s);
- GNUNET_assert (GNUNET_YES ==
- GNUNET_CONTAINER_multihashmap_remove (s->plugin->sessions,
- &s->target.hashPubKey,
- s));
- GNUNET_free (s);
-}
-
-static const char *
-udp_address_to_string (void *cls, const void *addr, size_t addrlen);
-
-/**
- * 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 Session *s = 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 Session *s;
- const struct IPv4UdpAddress *t4;
- const struct IPv6UdpAddress *t6;
- size_t mlen = msgbuf_size + sizeof (struct UDPMessage);
- char mbuf[mlen];
- struct UDPMessage *udp;
-
- if (mlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
- {
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "UDP transmits %u-byte message to `%s' using address `%s' session 0x%X mode %i\n",
- msgbuf_size, GNUNET_i2s (target), udp_address_to_string (NULL, addr,
- addrlen),
- session, force_address);
-
- /* no valid address given */
- if ((addr = NULL) || (addrlen == 0))
- {
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
-
- if (session != NULL)
- {
- s = find_session (target, addr, addrlen);
- if (s != session)
- {
- /* found a conflicting session for this peer */
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
- }
- else
- {
- /* use a reliable transmission but no session given */
- if (force_address == GNUNET_SYSERR)
- return GNUNET_SYSERR;
- /* create new session */
- s = create_session (plugin, target, addr, addrlen, cont, cont_cls);
- GNUNET_CONTAINER_multihashmap_put (plugin->sessions, &target->hashPubKey, s,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
- /* schedule invalidation task */
- s->invalidation_task =
- GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
- &invalidation_task, NULL);
- }
-
- /* Message */
- 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);
-
- struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
-
- if (s->flow_delay_from_other_peer.abs_value > now.abs_value)
- {
- struct GNUNET_TIME_Relative delta =
- GNUNET_TIME_absolute_get_difference (now,
- s->flow_delay_from_other_peer);
-
- LOG (GNUNET_ERROR_TYPE_DEBUG, "We try to send to early! Should in %llu!\n",
- delta.rel_value);
- }
- else
- LOG (GNUNET_ERROR_TYPE_DEBUG, "We can send!\n");
-
-
- /* send without fragmentation */
- if (mlen <= UDP_MTU)
- {
- mlen = udp_send (plugin, peer_session->sock_addr, &udp->header);
- if (cont != NULL)
- cont (cont_cls, target, (mlen > 0) ? GNUNET_OK : GNUNET_SYSERR);
- GNUNET_free_non_null (peer_session);
- }
- /* send with fragmentation */
- else
- {
- s->frag =
- GNUNET_FRAGMENT_context_create (plugin->env->stats, UDP_MTU,
- &plugin->tracker,
- plugin->last_expected_delay,
- &udp->header, &send_fragment, s);
- }
- return mlen;
-}
-
-
-/**
- * Message tokenizer has broken up an incomming message. Pass it on
- * to the service.
- *
- * @param cls the 'struct Plugin'
- * @param client the Session
- * @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 Session *s = client;
- struct GNUNET_ATS_Information distance;
- struct GNUNET_TIME_Relative delay;
-
- /* setup ATS */
- distance.type = htonl (GNUNET_ATS_QUALITY_NET_DISTANCE);
- distance.value = htonl (1);
-
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Giving Session %X %s to transport\n",
- s->session, GNUNET_i2s (&s->target));
- delay =
- plugin->env->receive (plugin->env->cls, &s->target, hdr, &distance, 1, s,
- // FIXME: USE UDP ADDRESSES!!!!
- s->sock_addr, s->addrlen);
- s->flow_delay_for_other_peer = delay;
-}
-
-
-/**
- * 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 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
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "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
-
- const struct UDPMessage *udp_msg = (const struct UDPMessage *) msg;
+ * Clsoure for 'asc'.
+ */
+ void *asc_cls;
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Lookup inbound UDP sessions for peer `%s' address `%s'\n",
- GNUNET_i2s (&udp_msg->sender), udp_address_to_string (NULL, arg, args));
+ /**
+ * Port to add after the IP address.
+ */
+ uint16_t port;
+};
- /* create a session for inbound connections */
- struct Session *s = NULL;
- s = find_inbound_session (plugin, &udp_msg->sender, sender_addr,
- sender_addr_len);
+/**
+ * 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
+ */
+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 (s != NULL)
+ if (addrlen == sizeof (struct IPv6UdpAddress))
{
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Found existing inbound UDP sessions 0x%X for peer `%s' address `%s'\n",
- s, GNUNET_i2s (&s->target), udp_address_to_string (NULL, arg, args));
+ t6 = addr;
+ af = AF_INET6;
+ port = ntohs (t6->u6_port);
+ memcpy (&a6, &t6->ipv6_addr, sizeof (a6));
+ sb = &a6;
}
- else
+ else if (addrlen == sizeof (struct IPv4UdpAddress))
{
- s = create_session (plugin, &udp_msg->sender, arg, args, NULL, NULL);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Creating inbound UDP sessions 0x%X for peer `%s' address `%s'\n", s,
- GNUNET_i2s (&s->target), udp_address_to_string (NULL, arg, args));
-
- GNUNET_assert (GNUNET_OK ==
- GNUNET_CONTAINER_multihashmap_put (plugin->sessions,
- &s->target.hashPubKey, s,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
+ t4 = addr;
+ af = AF_INET;
+ port = ntohs (t4->u4_port);
+ memcpy (&a4, &t4->ipv4_addr, sizeof (a4));
+ sb = &a4;
}
- s->valid_until =
- GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
- GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
- if (s->invalidation_task != GNUNET_SCHEDULER_NO_TASK)
+ else
{
- GNUNET_SCHEDULER_cancel (s->invalidation_task);
- s->invalidation_task = GNUNET_SCHEDULER_NO_TASK;
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Rescheduling %X' `%s'\n", s,
- udp_address_to_string (NULL, arg, args));
+ GNUNET_break_op (0);
+ return NULL;
}
- s->invalidation_task =
- GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
- &invalidation_task, s);
- /* we received from peer, so session is bidirectional and reliable */
- s->bidirectional = GNUNET_YES;
-
- GNUNET_SERVER_mst_receive (plugin->mst, &s, (const char *) &msg[1],
- ntohs (msg->header.size) -
- sizeof (struct UDPMessage), GNUNET_YES, GNUNET_NO);
+ inet_ntop (af, sb, buf, INET6_ADDRSTRLEN);
+ GNUNET_snprintf (rbuf, sizeof (rbuf), (af == AF_INET6) ? "[%s]:%u" : "%s:%u",
+ buf, port);
+ return rbuf;
}
/**
- * Read and process a message from the given socket.
+ * Append our port and forward the result.
*
- * @param plugin the overall plugin
- * @param rsock socket to read from
+ * @param cls a 'struct PrettyPrinterContext'
+ * @param hostname result from DNS resolver
*/
static void
-udp_read (struct Plugin *plugin, struct GNUNET_NETWORK_Handle *rsock)
+append_port (void *cls, const char *hostname)
{
- socklen_t fromlen;
- char addr[32];
- char buf[65536];
- ssize_t ret;
- const struct GNUNET_MessageHeader *msg;
- const struct GNUNET_MessageHeader *ack;
- struct Session *peer_session;
- const struct UDP_ACK_Message *udp_ack;
- struct ReceiveContext *rc;
- struct GNUNET_TIME_Absolute now;
- struct FindReceiveContext frc;
- struct Session *s = NULL;
- struct GNUNET_TIME_Relative flow_delay;
-
- 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;
- }
- msg = (const struct GNUNET_MessageHeader *) buf;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "UDP received %u-byte message from `%s' type %i\n", (unsigned int) ret,
- GNUNET_a2s ((const struct sockaddr *) addr, fromlen), ntohs (msg->type));
-
- if (ret != ntohs (msg->size))
- {
- GNUNET_break_op (0);
- return;
- }
+ struct PrettyPrinterContext *ppc = cls;
+ char *ret;
- switch (ntohs (msg->type))
+ if (hostname == NULL)
{
- 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 UDP_ACK_Message) + sizeof (struct GNUNET_MessageHeader))
- {
- GNUNET_break_op (0);
- return;
- }
- udp_ack = (const struct UDP_ACK_Message *) msg;
- 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));
-
- // TODO Guess a session from address, give it defragmenter and check in process_udp if guess was right
- s = guess_session (plugin->sessions, addr, addrlen);
- if (GNUNET_OK != GNUNET_FRAGMENT_process_ack (peer_session->frag, ack))
- // ... other stuff
- return;
-
- case GNUNET_MESSAGE_TYPE_FRAGMENT:
- 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));
- // TODO Guess a session from address, give it defragmenter and check in process_udp if guess was right
- s = guess_session (plugin->sessions, addr, addrlen);
- if (GNUNET_OK == GNUNET_DEFRAGMENT_process_fragment (rc->defrag, msg))
- // other stuff
- return;
- default:
- GNUNET_break_op (0);
+ ppc->asc (ppc->asc_cls, NULL);
+ GNUNET_free (ppc);
return;
}
+ GNUNET_asprintf (&ret, "%s:%d", hostname, ppc->port);
+ ppc->asc (ppc->asc_cls, ret);
+ GNUNET_free (ret);
}
/**
- * 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.
+ * Convert the transports address to a nice, human-readable
+ * format.
*
- * @param cls the plugin handle
- * @param tc the scheduling context (for rescheduling this function again)
+ * @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_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+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 Plugin *plugin = 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;
- plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
- if ((tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
+ 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;
- if ((NULL != plugin->sockv4) &&
- (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv4)))
- udp_read (plugin, plugin->sockv4);
- if ((NULL != plugin->sockv6) &&
- (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);
-
+ }
+ 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);
}
}
+
/**
* 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
/**
- * 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.
+ * Disconnect from a remote node. Clean up session if we have one for this peer
*
- * @param cls closure
- * @param addr binary address
- * @param addrlen length of the address
- * @return string representing the same address
+ * @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 const char *
-udp_address_to_string (void *cls, const void *addr, size_t addrlen)
+static void
+udp_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
{
- 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), (af == AF_INET6) ? "[%s]:%u" : "%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.
+ * Creates a new outbound session the transport service will use to send data to the
+ * peer
*
- * @param cls a 'struct PrettyPrinterContext'
- * @param hostname result from DNS resolver
+ * @param cls the plugin
+ * @param address the address
+ * @return the session or NULL of max connections exceeded
*/
-static void
-append_port (void *cls, const char *hostname)
+
+static struct Session *
+udp_plugin_get_session (void *cls,
+ const struct GNUNET_HELLO_Address *address)
{
- struct PrettyPrinterContext *ppc = cls;
- char *ret;
+ struct Session * s = NULL;
+ //struct Plugin * plugin = cls;
- if (hostname == NULL)
- {
- ppc->asc (ppc->asc_cls, NULL);
- GNUNET_free (ppc);
- return;
- }
- GNUNET_asprintf (&ret, "%s:%d", hostname, ppc->port);
- ppc->asc (ppc->asc_cls, ret);
- GNUNET_free (ret);
+ return s;
}
/**
- * Convert the transports address to a nice, human-readable
- * format.
+ * Function that can be used by the transport service to transmit
+ * a message using the plugin. Note that in the case of a
+ * peer disconnecting, the continuation MUST be called
+ * prior to the disconnect notification itself. This function
+ * will be called with this peer's HELLO message to initiate
+ * a fresh connection to another peer.
*
* @param cls closure
- * @param 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
+ * @param session which session must be used
+ * @param msgbuf the message to transmit
+ * @param msgbuf_size number of bytes in 'msgbuf'
+ * @param priority how important is the message (most plugins will
+ * ignore message priority and just FIFO)
+ * @param to how long to wait at most for the transmission (does not
+ * require plugins to discard the message after the timeout,
+ * just advisory for the desired delay; most plugins will ignore
+ * this as well)
+ * @param cont continuation to call once the message has
+ * been transmitted (or if the transport is ready
+ * for the next transmission call; or if the
+ * peer disconnected...); can be NULL
+ * @param cont_cls closure for cont
+ * @return number of bytes used (on the physical network, with overheads);
+ * -1 on hard errors (i.e. address invalid); 0 is a legal value
+ * and does NOT mean that the message was not transmitted (DV)
*/
-static 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)
+static ssize_t
+udp_plugin_send (void *cls,
+ struct Session *session,
+ const char *msgbuf, size_t msgbuf_size,
+ unsigned int priority,
+ struct GNUNET_TIME_Relative to,
+ GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
{
- struct 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);
+ return 0;
+
}
}
-/**
- * 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)
+static int
+setup_sockets (struct Plugin *plugin, struct sockaddr_in6 *serverAddrv6, struct sockaddr_in *serverAddrv4)
{
- 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;
+ int tries;
+ int sockets_created = 0;
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 * 50; /* 50 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)
- {
- 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))
- {
- 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);
- GNUNET_free (api);
- return NULL;
- }
- }
-
- if (GNUNET_YES ==
- GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
- "BINDTO6", &plugin->bind6_address))
- {
- 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))
- {
- 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);
- GNUNET_free (api);
- 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);
- plugin->inbound_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")))
+ /* Create IPv6 socket */
+ if (plugin->enable_ipv6 == GNUNET_YES)
{
plugin->sockv6 = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_DGRAM, 0);
if (NULL == plugin->sockv6)
#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;
+ serverAddrv6->sin6_family = AF_INET6;
+ serverAddrv6->sin6_addr = in6addr_any;
+ serverAddrv6->sin6_port = htons (plugin->port);
+ addrlen = sizeof (struct sockaddr_in6);
+ serverAddr = (struct sockaddr *) serverAddrv6;
#if DEBUG_UDP
LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv6 port %d\n",
- ntohs (serverAddrv6.sin6_port));
+ 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 */
+ serverAddrv6->sin6_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000); /* Find a good, non-root port */
#if DEBUG_UDP
LOG (GNUNET_ERROR_TYPE_DEBUG,
"IPv6 Binding failed, trying new port %d\n",
- ntohs (serverAddrv6.sin6_port));
+ ntohs (serverAddrv6->sin6_port));
#endif
tries++;
if (tries > 10)
}
if (plugin->sockv6 != NULL)
{
- addrs[sockets_created] = (struct sockaddr *) &serverAddrv6;
- addrlens[sockets_created] = sizeof (serverAddrv6);
+#if DEBUG_UDP
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "IPv6 socket created on port %d\n",
+ ntohs (serverAddrv6->sin6_port));
+#endif
+ addrs[sockets_created] = (struct sockaddr *) serverAddrv6;
+ addrlens[sockets_created] = sizeof (struct sockaddr_in6);
sockets_created++;
}
}
}
- plugin->mst =
- GNUNET_SERVER_mst_create (&process_inbound_tokenized_messages, plugin);
+ /* Create IPv4 socket */
plugin->sockv4 = GNUNET_NETWORK_socket_create (PF_INET, SOCK_DGRAM, 0);
if (NULL == plugin->sockv4)
{
#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;
+ serverAddrv4->sin_family = AF_INET;
+ serverAddrv4->sin_addr.s_addr = INADDR_ANY;
+ serverAddrv4->sin_port = htons (plugin->port);
+ addrlen = sizeof (struct sockaddr_in);
+ serverAddr = (struct sockaddr *) serverAddrv4;
+
#if DEBUG_UDP
LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv4 port %d\n",
- ntohs (serverAddrv4.sin_port));
+ 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 */
+ serverAddrv4->sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000); /* Find a good, non-root port */
#if DEBUG_UDP
LOG (GNUNET_ERROR_TYPE_DEBUG, "IPv4 Binding failed, trying new port %d\n",
- ntohs (serverAddrv4.sin_port));
+ ntohs (serverAddrv4->sin_port));
#endif
tries++;
if (tries > 10)
}
if (plugin->sockv4 != NULL)
{
- addrs[sockets_created] = (struct sockaddr *) &serverAddrv4;
- addrlens[sockets_created] = sizeof (serverAddrv4);
+ addrs[sockets_created] = (struct sockaddr *) serverAddrv4;
+ addrlens[sockets_created] = sizeof (struct sockaddr_in);
sockets_created++;
}
}
+ /* Create file descriptors */
plugin->rs = GNUNET_NETWORK_fdset_create ();
GNUNET_NETWORK_fdset_zero (plugin->rs);
if (NULL != 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,
+
+ plugin->nat = GNUNET_NAT_register (plugin->env->cfg,
+ GNUNET_NO, plugin->port,
+ sockets_created,
(const struct sockaddr **) addrs, addrlens,
&udp_nat_port_map_callback, NULL, plugin);
- return api;
+
+ return sockets_created;
}
+
/**
- * Shutdown the plugin.
+ * The exported method. Makes the core api available via a global and
+ * returns the udp transport API.
*
- * @param cls our 'struct GNUNET_TRANSPORT_PluginFunctions'
- * @return NULL
+ * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
+ * @return our 'struct GNUNET_TRANSPORT_PluginFunctions'
*/
void *
-libgnunet_plugin_transport_udp_done (void *cls)
+libgnunet_plugin_transport_udp_init (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;
- GNUNET_CONTAINER_multihashmap_iterate (plugin->inbound_sessions,
- &destroy_inbound_session, NULL);
- GNUNET_CONTAINER_multihashmap_destroy (plugin->inbound_sessions);
- plugin->inbound_sessions = NULL;
- while (NULL != (rc = GNUNET_CONTAINER_heap_remove_root (plugin->defrags)))
+ struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
+ struct GNUNET_TRANSPORT_PluginFunctions *api;
+ struct Plugin *plugin;
+
+ unsigned long long port;
+ unsigned long long aport;
+ unsigned long long broadcast;
+ unsigned long long udp_max_bps;
+ unsigned long long enable_v6;
+ char * bind4_address;
+ char * bind6_address;
+ struct GNUNET_TIME_Relative interval;
+
+ struct sockaddr_in serverAddrv4;
+ struct sockaddr_in6 serverAddrv6;
+
+ int res;
+
+ /* Get port number */
+ 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",
+ "ADVERTISED_PORT", &aport))
+ aport = port;
+ if (port > 65535)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("Given `%s' option is out of range: %llu > %u\n"), "PORT", port,
+ 65535);
+ return NULL;
+ }
+
+ /* Protocols */
+ if ((GNUNET_YES ==
+ GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "nat",
+ "DISABLEV6")))
+ {
+ enable_v6 = GNUNET_NO;
+ }
+ else
+ enable_v6 = GNUNET_YES;
+
+
+ /* Addresses */
+ memset (&serverAddrv6, 0, sizeof (serverAddrv6));
+ memset (&serverAddrv4, 0, sizeof (serverAddrv4));
+
+ if (GNUNET_YES ==
+ GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
+ "BINDTO", &bind4_address))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Binding udp plugin to specific address: `%s'\n",
+ bind4_address);
+ if (1 != inet_pton (AF_INET, bind4_address, &serverAddrv4.sin_addr))
+ {
+ GNUNET_free (bind4_address);
+ return NULL;
+ }
+ }
+
+ if (GNUNET_YES ==
+ GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
+ "BINDTO6", &bind6_address))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Binding udp plugin to specific address: `%s'\n",
+ bind6_address);
+ if (1 !=
+ inet_pton (AF_INET6, bind6_address, &serverAddrv6.sin6_addr))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid IPv6 address: `%s'\n"),
+ bind6_address);
+ GNUNET_free_non_null (bind4_address);
+ GNUNET_free (bind6_address);
+ return NULL;
+ }
+ }
+
+
+ /* Enable neighbour discovery */
+ broadcast = GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "transport-udp",
+ "BROADCAST");
+ if (broadcast == GNUNET_SYSERR)
+ broadcast = GNUNET_NO;
+
+ if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_time (env->cfg, "transport-udp",
+ "BROADCAST_INTERVAL", &interval))
+ {
+ interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10);
+ }
+
+ /* Maximum datarate */
+ if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
+ "MAX_BPS", &udp_max_bps))
{
- GNUNET_DEFRAGMENT_context_destroy (rc->defrag);
- GNUNET_free (rc);
+ udp_max_bps = 1024 * 1024 * 50; /* 50 MB/s == infinity for practical purposes */
}
- GNUNET_CONTAINER_heap_destroy (plugin->defrags);
- if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
+ plugin = GNUNET_malloc (sizeof (struct Plugin));
+ api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
+
+ GNUNET_BANDWIDTH_tracker_init (&plugin->tracker,
+ GNUNET_BANDWIDTH_value_init ((uint32_t)udp_max_bps), 30);
+
+ plugin->port = port;
+ plugin->aport = aport;
+ plugin->last_expected_delay = GNUNET_TIME_UNIT_SECONDS;
+ plugin->broadcast_interval = interval;
+ plugin->enable_ipv6 = enable_v6;
+ plugin->env = env;
+
+ api->cls = plugin;
+ api->send = NULL;
+ 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;
+ api->get_session = &udp_plugin_get_session;
+ api->send_with_session = &udp_plugin_send;
+
+ LOG (GNUNET_ERROR_TYPE_ERROR, "Setting up sockets\n");
+ res = setup_sockets (plugin, &serverAddrv6, &serverAddrv4);
+ if ((res == 0) || ((plugin->sockv4 == NULL) && (plugin->sockv6 == NULL)))
{
- GNUNET_SCHEDULER_cancel (plugin->select_task);
- plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
+ LOG (GNUNET_ERROR_TYPE_ERROR, "Failed to create network sockets, plugin failed\n");
+ GNUNET_free (plugin);
+ GNUNET_free (api);
+ return NULL;
}
+ LOG (GNUNET_ERROR_TYPE_ERROR, "Starting broadcasting\n");
+ //setup_broadcast (plugin, &serverAddrv6, &serverAddrv4);
+
+
+ GNUNET_free_non_null (bind4_address);
+ GNUNET_free_non_null (bind6_address);
+ return api;
+}
+
+
+/**
+ * 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_done (void *cls)
+{
+ struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
+ struct Plugin *plugin = api->cls;
+
+ /* Closing sockets */
if (plugin->sockv4 != NULL)
{
GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv4));
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);
return NULL;
}
+
/* end of plugin_transport_udp.c */
--- /dev/null
+/*
+ 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_broadcasting.c
+ * @brief Neighbour discovery with UDP
+ * @author Christian Grothoff
+ * @author Matthias Wachs
+ */
+#include "platform.h"
+#include "plugin_transport_udp_new.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_constants.h"
+#include "gnunet_statistics_service.h"
+#include "gnunet_transport_service.h"
+#include "gnunet_transport_plugin.h"
+#include "transport.h"
+
+#define LOG(kind,...) GNUNET_log_from (kind, "transport-udp", __VA_ARGS__)
+
+
+struct UDP_Beacon_Message
+{
+ /**
+ * Message header.
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * What is the identity of the sender
+ */
+ struct GNUNET_PeerIdentity sender;
+};
+
+
+struct BroadcastAddress
+{
+ struct BroadcastAddress *next;
+ struct BroadcastAddress *prev;
+
+ void *addr;
+ socklen_t addrlen;
+};
+
+
+struct Mstv4Context
+{
+ struct Plugin *plugin;
+
+ struct IPv4UdpAddress addr;
+ /**
+ * ATS network type in NBO
+ */
+ uint32_t ats_address_network_type;
+};
+
+struct Mstv6Context
+{
+ struct Plugin *plugin;
+
+ struct IPv6UdpAddress addr;
+ /**
+ * ATS network type in NBO
+ */
+ uint32_t ats_address_network_type;
+};
+
+
+
+void
+broadcast_ipv6_mst_cb (void *cls, void *client,
+ const struct GNUNET_MessageHeader *message)
+{
+
+ struct Plugin *plugin = cls;
+ struct Mstv6Context *mc = client;
+ const struct GNUNET_MessageHeader *hello;
+ struct UDP_Beacon_Message *msg;
+
+ msg = (struct UDP_Beacon_Message *) message;
+
+ if (GNUNET_MESSAGE_TYPE_TRANSPORT_BROADCAST_BEACON !=
+ ntohs (msg->header.type))
+ return;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Received beacon with %u bytes from peer `%s' via address `%s'\n",
+ ntohs (msg->header.size), GNUNET_i2s (&msg->sender),
+ udp_address_to_string (NULL, &mc->addr, sizeof (mc->addr)));
+
+ struct GNUNET_ATS_Information atsi[2];
+
+ /* setup ATS */
+ atsi[0].type = htonl (GNUNET_ATS_QUALITY_NET_DISTANCE);
+ atsi[0].value = htonl (1);
+ atsi[1].type = htonl (GNUNET_ATS_NETWORK_TYPE);
+ atsi[1].value = mc->ats_address_network_type;
+ GNUNET_break (ntohl(mc->ats_address_network_type) != GNUNET_ATS_NET_UNSPECIFIED);
+
+ hello = (struct GNUNET_MessageHeader *) &msg[1];
+ plugin->env->receive (plugin->env->cls, &msg->sender, hello,
+ (const struct GNUNET_ATS_Information *) &atsi, 2, NULL,
+ (const char *) &mc->addr, sizeof (mc->addr));
+
+ GNUNET_STATISTICS_update (plugin->env->stats,
+ _
+ ("# IPv6 multicast HELLO beacons received via udp"),
+ 1, GNUNET_NO);
+ GNUNET_free (mc);
+}
+
+void
+broadcast_ipv4_mst_cb (void *cls, void *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct Plugin *plugin = cls;
+ struct Mstv4Context *mc = client;
+ const struct GNUNET_MessageHeader *hello;
+ struct UDP_Beacon_Message *msg;
+
+ msg = (struct UDP_Beacon_Message *) message;
+
+ if (GNUNET_MESSAGE_TYPE_TRANSPORT_BROADCAST_BEACON !=
+ ntohs (msg->header.type))
+ return;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Received beacon with %u bytes from peer `%s' via address `%s'\n",
+ ntohs (msg->header.size), GNUNET_i2s (&msg->sender),
+ udp_address_to_string (NULL, &mc->addr, sizeof (mc->addr)));
+
+ struct GNUNET_ATS_Information atsi[2];
+
+ /* setup ATS */
+ atsi[0].type = htonl (GNUNET_ATS_QUALITY_NET_DISTANCE);
+ atsi[0].value = htonl (1);
+ atsi[1].type = htonl (GNUNET_ATS_NETWORK_TYPE);
+ atsi[1].value = mc->ats_address_network_type;
+ GNUNET_break (ntohl(mc->ats_address_network_type) != GNUNET_ATS_NET_UNSPECIFIED);
+
+ hello = (struct GNUNET_MessageHeader *) &msg[1];
+ plugin->env->receive (plugin->env->cls, &msg->sender, hello,
+ (const struct GNUNET_ATS_Information *) &atsi, 2, NULL,
+ (const char *) &mc->addr, sizeof (mc->addr));
+
+ GNUNET_STATISTICS_update (plugin->env->stats,
+ _
+ ("# IPv4 broadcast HELLO beacons received via udp"),
+ 1, GNUNET_NO);
+ GNUNET_free (mc);
+}
+
+static void
+udp_ipv4_broadcast_send (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct Plugin *plugin = cls;
+ int sent;
+ uint16_t msg_size;
+ uint16_t hello_size;
+ char buf[65536];
+
+ const struct GNUNET_MessageHeader *hello;
+ struct UDP_Beacon_Message *msg;
+ struct BroadcastAddress *baddr;
+
+ plugin->send_ipv4_broadcast_task = GNUNET_SCHEDULER_NO_TASK;
+
+ hello = plugin->env->get_our_hello ();
+ hello_size = GNUNET_HELLO_size ((struct GNUNET_HELLO_Message *) hello);
+ msg_size = hello_size + sizeof (struct UDP_Beacon_Message);
+
+ if (hello_size < (sizeof (struct GNUNET_MessageHeader)) ||
+ (msg_size > (UDP_MTU)))
+ return;
+
+ msg = (struct UDP_Beacon_Message *) buf;
+ msg->sender = *(plugin->env->my_identity);
+ msg->header.size = ntohs (msg_size);
+ msg->header.type = ntohs (GNUNET_MESSAGE_TYPE_TRANSPORT_BROADCAST_BEACON);
+ memcpy (&msg[1], hello, hello_size);
+ sent = 0;
+
+ baddr = plugin->ipv4_broadcast_head;
+ /* just IPv4 */
+ while ((baddr != NULL) && (baddr->addrlen == sizeof (struct sockaddr_in)))
+ {
+ struct sockaddr_in *addr = (struct sockaddr_in *) baddr->addr;
+
+ addr->sin_port = htons (plugin->port);
+
+ sent =
+ GNUNET_NETWORK_socket_sendto (plugin->sockv4, msg, msg_size,
+ (const struct sockaddr *) addr,
+ baddr->addrlen);
+ if (sent == GNUNET_SYSERR)
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "sendto");
+ else
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Sent HELLO beacon broadcast with %i bytes to address %s\n", sent,
+ GNUNET_a2s (baddr->addr, baddr->addrlen));
+ baddr = baddr->next;
+ }
+
+ plugin->send_ipv4_broadcast_task =
+ GNUNET_SCHEDULER_add_delayed (plugin->broadcast_interval,
+ &udp_ipv4_broadcast_send, plugin);
+}
+
+static void
+udp_ipv6_broadcast_send (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct Plugin *plugin = cls;
+ int sent;
+ uint16_t msg_size;
+ uint16_t hello_size;
+ char buf[65536];
+
+ const struct GNUNET_MessageHeader *hello;
+ struct UDP_Beacon_Message *msg;
+
+ plugin->send_ipv6_broadcast_task = GNUNET_SCHEDULER_NO_TASK;
+
+ hello = plugin->env->get_our_hello ();
+ hello_size = GNUNET_HELLO_size ((struct GNUNET_HELLO_Message *) hello);
+ msg_size = hello_size + sizeof (struct UDP_Beacon_Message);
+
+ if (hello_size < (sizeof (struct GNUNET_MessageHeader)) ||
+ (msg_size > (UDP_MTU)))
+ return;
+
+ msg = (struct UDP_Beacon_Message *) buf;
+ msg->sender = *(plugin->env->my_identity);
+ msg->header.size = ntohs (msg_size);
+ msg->header.type = ntohs (GNUNET_MESSAGE_TYPE_TRANSPORT_BROADCAST_BEACON);
+ memcpy (&msg[1], hello, hello_size);
+ sent = 0;
+
+ sent =
+ GNUNET_NETWORK_socket_sendto (plugin->sockv6, msg, msg_size,
+ (const struct sockaddr *)
+ &plugin->ipv6_multicast_address,
+ sizeof (struct sockaddr_in6));
+ if (sent == GNUNET_SYSERR)
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "sendto");
+ else
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending IPv6 HELLO beacon broadcast with %i bytes to address %s\n",
+ sent,
+ GNUNET_a2s ((const struct sockaddr *) &plugin->ipv6_multicast_address,
+ sizeof (struct sockaddr_in6)));
+
+
+
+ plugin->send_ipv6_broadcast_task =
+ GNUNET_SCHEDULER_add_delayed (plugin->broadcast_interval,
+ &udp_ipv6_broadcast_send, plugin);
+}
+
+
+static int
+iface_proc (void *cls, const char *name, int isDefault,
+ const struct sockaddr *addr, const struct sockaddr *broadcast_addr,
+ const struct sockaddr *netmask, socklen_t addrlen)
+{
+ struct Plugin *plugin = cls;
+
+ if (addr != NULL)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "address %s for interface %s %p\n ",
+ GNUNET_a2s (addr, addrlen), name, addr);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "broadcast address %s for interface %s %p\n ",
+ GNUNET_a2s (broadcast_addr, addrlen), name, broadcast_addr);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "netmask %s for interface %s %p\n ",
+ GNUNET_a2s (netmask, addrlen), name, netmask);
+
+
+ /* Collecting broadcast addresses */
+ if (broadcast_addr != NULL)
+ {
+ struct BroadcastAddress *ba =
+ GNUNET_malloc (sizeof (struct BroadcastAddress));
+ ba->addr = GNUNET_malloc (addrlen);
+ memcpy (ba->addr, broadcast_addr, addrlen);
+ ba->addrlen = addrlen;
+ GNUNET_CONTAINER_DLL_insert (plugin->ipv4_broadcast_head,
+ plugin->ipv4_broadcast_tail, ba);
+ }
+ }
+ return GNUNET_OK;
+}
+
+
+void
+setup_broadcast (struct Plugin *plugin, struct sockaddr_in6 *serverAddrv6, struct sockaddr_in *serverAddrv4)
+{
+ /* create IPv4 broadcast socket */
+ plugin->broadcast_ipv4 = GNUNET_NO;
+ if (plugin->sockv4 != NULL)
+ {
+ int yes = 1;
+
+ if (GNUNET_NETWORK_socket_setsockopt
+ (plugin->sockv4, SOL_SOCKET, SO_BROADCAST, &yes,
+ sizeof (int)) != GNUNET_OK)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _
+ ("Failed to set IPv4 broadcast option for broadcast socket on port %d\n"),
+ ntohs (serverAddrv4->sin_port));
+ }
+ else
+ {
+ GNUNET_OS_network_interfaces_list (iface_proc, plugin);
+ plugin->send_ipv4_broadcast_task =
+ GNUNET_SCHEDULER_add_now (&udp_ipv4_broadcast_send, plugin);
+
+ plugin->broadcast_ipv4_mst =
+ GNUNET_SERVER_mst_create (broadcast_ipv4_mst_cb, plugin);
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "IPv4 Broadcasting running\n");
+ plugin->broadcast_ipv4 = GNUNET_YES;
+ }
+ }
+
+ plugin->broadcast_ipv6 = GNUNET_NO;
+ if (plugin->sockv6 != NULL)
+ {
+ memset (&plugin->ipv6_multicast_address, 0, sizeof (struct sockaddr_in6));
+ GNUNET_assert (1 ==
+ inet_pton (AF_INET6, "FF05::13B",
+ &plugin->ipv6_multicast_address.sin6_addr));
+
+ plugin->ipv6_multicast_address.sin6_family = AF_INET6;
+ plugin->ipv6_multicast_address.sin6_port = htons (plugin->port);
+
+ plugin->broadcast_ipv6_mst =
+ GNUNET_SERVER_mst_create (broadcast_ipv6_mst_cb, plugin);
+
+ /* Create IPv6 multicast request */
+ struct ipv6_mreq multicastRequest;
+
+ multicastRequest.ipv6mr_multiaddr =
+ plugin->ipv6_multicast_address.sin6_addr;
+ /* TODO: 0 selects the "best" interface, tweak to use all interfaces
+ *
+ * http://tools.ietf.org/html/rfc2553#section-5.2:
+ *
+ * IPV6_JOIN_GROUP
+ *
+ * Join a multicast group on a specified local interface. If the
+ * interface index is specified as 0, the kernel chooses the local
+ * interface. For example, some kernels look up the multicast
+ * group in the normal IPv6 routing table and using the resulting
+ * interface.
+ * */
+ multicastRequest.ipv6mr_interface = 0;
+
+ /* Join the multicast group */
+ if (GNUNET_NETWORK_socket_setsockopt
+ (plugin->sockv6, IPPROTO_IPV6, IPV6_JOIN_GROUP,
+ (char *) &multicastRequest, sizeof (multicastRequest)) != GNUNET_OK)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "Failed to join IPv6 multicast group: IPv6 broadcasting not running\n");
+ }
+ else
+ {
+#if DEBUG_UDP
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "IPv6 broadcasting running\n");
+#endif
+ plugin->send_ipv6_broadcast_task =
+ GNUNET_SCHEDULER_add_now (&udp_ipv6_broadcast_send, plugin);
+ plugin->broadcast_ipv6 = GNUNET_YES;
+ }
+ }
+}
+
+void
+stop_broadcast (struct Plugin *plugin)
+{
+ if (plugin->broadcast_ipv4)
+ {
+ if (plugin->send_ipv4_broadcast_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (plugin->send_ipv4_broadcast_task);
+ plugin->send_ipv4_broadcast_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+
+ if (plugin->broadcast_ipv4_mst != NULL)
+ GNUNET_SERVER_mst_destroy (plugin->broadcast_ipv4_mst);
+
+ while (plugin->ipv4_broadcast_head != NULL)
+ {
+ struct BroadcastAddress *p = plugin->ipv4_broadcast_head;
+
+ GNUNET_CONTAINER_DLL_remove (plugin->ipv4_broadcast_head,
+ plugin->ipv4_broadcast_tail, p);
+ GNUNET_free (p->addr);
+ GNUNET_free (p);
+ }
+ }
+
+ if (plugin->broadcast_ipv6)
+ {
+ /* Create IPv6 multicast request */
+ struct ipv6_mreq multicastRequest;
+
+ multicastRequest.ipv6mr_multiaddr =
+ plugin->ipv6_multicast_address.sin6_addr;
+ multicastRequest.ipv6mr_interface = 0;
+
+ /* Join the multicast address */
+ if (GNUNET_NETWORK_socket_setsockopt
+ (plugin->sockv6, IPPROTO_IPV6, IPV6_LEAVE_GROUP,
+ (char *) &multicastRequest, sizeof (multicastRequest)) != GNUNET_OK)
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, setsockopt);
+ }
+ else
+ {
+#if DEBUG_UDP
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "IPv6 Broadcasting stopped\n");
+#endif
+ }
+
+ if (plugin->send_ipv6_broadcast_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (plugin->send_ipv6_broadcast_task);
+ plugin->send_ipv6_broadcast_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ if (plugin->broadcast_ipv6_mst != NULL)
+ GNUNET_SERVER_mst_destroy (plugin->broadcast_ipv6_mst);
+ }
+
+}
+
+/* end of plugin_transport_udp_broadcasting.c */
projects / oweals / gnunet.git / commitdiff