/*
This file is part of GNUnet
- (C) 2010, 2011 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2010, 2011 GNUnet e.V.
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
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.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
*/
/**
#define LOG(kind,...) GNUNET_log_from (kind, "transport-udp", __VA_ARGS__)
+/* *********** Cryogenic ********** */
+#if LINUX
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include <sys/ioctl.h>
+#include <sys/select.h>
+#include <sys/time.h>
+
+#define PM_MAGIC 'k'
+#define PM_SET_DELAY_AND_TIMEOUT _IOW(PM_MAGIC, 1, struct pm_times)
+
+struct pm_times {
+ unsigned long delay_msecs;
+ unsigned long timeout_msecs;
+};
+#endif
+/************************************/
+
struct UDP_Beacon_Message
{
struct BroadcastAddress
{
struct BroadcastAddress *next;
- struct BroadcastAddress *prev;
- void *addr;
- socklen_t addrlen;
-};
+ struct BroadcastAddress *prev;
+ /**
+ * ID of select broadcast task
+ */
+ struct GNUNET_SCHEDULER_Task * broadcast_task;
-struct Mstv4Context
-{
struct Plugin *plugin;
- struct IPv4UdpAddress addr;
+ struct sockaddr *addr;
+
+ socklen_t addrlen;
+
+#if LINUX
/**
- * ATS network type in NBO
+ * Cryogenic handle.
*/
- uint32_t ats_address_network_type;
-};
+ struct GNUNET_DISK_FileHandle *cryogenic_fd;
-struct Mstv6Context
-{
- struct Plugin *plugin;
-
- struct IPv6UdpAddress addr;
/**
- * ATS network type in NBO
+ * Time out for cryogenic.
*/
- uint32_t ats_address_network_type;
+ struct pm_times cryogenic_times;
+#endif
};
-
-int
-broadcast_ipv6_mst_cb (void *cls, void *client,
- const struct GNUNET_MessageHeader *message)
+/**
+ * Client-specific context for #broadcast_mst_cb().
+ */
+struct MstContext
{
+ struct Plugin *plugin;
- struct Plugin *plugin = cls;
- struct Mstv6Context *mc = client;
- const struct GNUNET_MessageHeader *hello;
- struct UDP_Beacon_Message *msg;
-
- msg = (struct UDP_Beacon_Message *) message;
+ const union UdpAddress *udp_addr;
- if (GNUNET_MESSAGE_TYPE_TRANSPORT_BROADCAST_BEACON !=
- ntohs (msg->header.type))
- return GNUNET_OK;
- 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);
+ size_t udp_addr_len;
- 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));
+ /**
+ * ATS network type.
+ */
+ enum GNUNET_ATS_Network_Type ats_address_network_type;
+};
- GNUNET_STATISTICS_update (plugin->env->stats,
- _
- ("# IPv6 multicast HELLO beacons received via udp"),
- 1, GNUNET_NO);
- GNUNET_free (mc);
- return GNUNET_OK;
-}
-int
-broadcast_ipv4_mst_cb (void *cls, void *client,
- const struct GNUNET_MessageHeader *message)
+/**
+ * Parse broadcast message received.
+ *
+ * @param cls the `struct Plugin`
+ * @param client the `struct MstContext` with sender address
+ * @param message the message we received
+ * @return #GNUNET_OK (always)
+ */
+static int
+broadcast_mst_cb (void *cls,
+ void *client,
+ const struct GNUNET_MessageHeader *message)
{
struct Plugin *plugin = cls;
- struct Mstv4Context *mc = client;
+ struct MstContext *mc = client;
+ struct GNUNET_HELLO_Address *address;
const struct GNUNET_MessageHeader *hello;
- struct UDP_Beacon_Message *msg;
+ const struct UDP_Beacon_Message *msg;
- msg = (struct UDP_Beacon_Message *) message;
+ msg = (const struct UDP_Beacon_Message *) message;
if (GNUNET_MESSAGE_TYPE_TRANSPORT_BROADCAST_BEACON !=
ntohs (msg->header.type))
return GNUNET_OK;
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);
-
+ ntohs (msg->header.size),
+ GNUNET_i2s (&msg->sender),
+ udp_address_to_string (NULL,
+ mc->udp_addr,
+ mc->udp_addr_len));
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));
-
+ address = GNUNET_HELLO_address_allocate (&msg->sender,
+ PLUGIN_NAME,
+ mc->udp_addr,
+ mc->udp_addr_len,
+ GNUNET_HELLO_ADDRESS_INFO_NONE);
+ plugin->env->receive (plugin->env->cls,
+ address,
+ NULL,
+ hello);
+ GNUNET_HELLO_address_free (address);
GNUNET_STATISTICS_update (plugin->env->stats,
- _
- ("# IPv4 broadcast HELLO beacons received via udp"),
+ _("# Multicast HELLO beacons received via UDP"),
1, GNUNET_NO);
- GNUNET_free (mc);
return GNUNET_OK;
}
+
+/**
+ * We received a broadcast message. Process it and all subsequent
+ * messages in the same packet.
+ *
+ * @param plugin the UDP plugin
+ * @param buf the buffer with the message(s)
+ * @param size number of bytes in @a buf
+ * @param udp_addr address of the sender
+ * @param udp_addr_len number of bytes in @a udp_addr
+ * @param network_type network type of the sender's address
+ */
void
-udp_broadcast_receive (struct Plugin *plugin, const char * buf, ssize_t size, struct sockaddr *addr, size_t addrlen)
+udp_broadcast_receive (struct Plugin *plugin,
+ const char *buf,
+ ssize_t size,
+ const union UdpAddress *udp_addr,
+ size_t udp_addr_len,
+ enum GNUNET_ATS_Network_Type network_type)
{
- struct GNUNET_ATS_Information ats;
-
- if ((GNUNET_YES == plugin->broadcast_ipv4) && (addrlen == sizeof (struct sockaddr_in)))
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Received IPv4 HELLO beacon broadcast with %i bytes from address %s\n",
- size, GNUNET_a2s ((const struct sockaddr *) addr, addrlen));
- struct Mstv4Context *mc;
-
- mc = GNUNET_malloc (sizeof (struct Mstv4Context));
- struct sockaddr_in *av4 = (struct sockaddr_in *) addr;
-
- mc->addr.ipv4_addr = av4->sin_addr.s_addr;
- mc->addr.u4_port = av4->sin_port;
- ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) addr, addrlen);
- mc->ats_address_network_type = ats.value;
-
- GNUNET_assert (NULL != plugin->broadcast_ipv4_mst);
- if (GNUNET_OK !=
- GNUNET_SERVER_mst_receive (plugin->broadcast_ipv4_mst, mc, buf, size,
- GNUNET_NO, GNUNET_NO))
- GNUNET_free (mc);
- }
- else if ((GNUNET_YES == plugin->broadcast_ipv4) && (addrlen == sizeof (struct sockaddr_in6)))
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Received IPv6 HELLO beacon broadcast with %i bytes from address %s\n",
- size, GNUNET_a2s ((const struct sockaddr *) &addr, addrlen));
- struct Mstv6Context *mc;
-
- mc = GNUNET_malloc (sizeof (struct Mstv6Context));
- struct sockaddr_in6 *av6 = (struct sockaddr_in6 *) addr;
-
- mc->addr.ipv6_addr = av6->sin6_addr;
- mc->addr.u6_port = av6->sin6_port;
- ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) addr, addrlen);
- mc->ats_address_network_type = ats.value;
- GNUNET_assert (NULL != plugin->broadcast_ipv4_mst);
- if (GNUNET_OK !=
- GNUNET_SERVER_mst_receive (plugin->broadcast_ipv6_mst, mc, buf, size,
- GNUNET_NO, GNUNET_NO))
- GNUNET_free (mc);
- }
+ struct MstContext mc;
+
+ mc.udp_addr = udp_addr;
+ mc.udp_addr_len = udp_addr_len;
+ mc.ats_address_network_type = network_type;
+ GNUNET_SERVER_mst_receive (plugin->broadcast_mst,
+ &mc,
+ buf, size,
+ GNUNET_NO,
+ GNUNET_NO);
}
+
static unsigned int
-prepare_beacon (struct Plugin *plugin, struct UDP_Beacon_Message *msg)
+prepare_beacon (struct Plugin *plugin,
+ struct UDP_Beacon_Message *msg)
{
uint16_t hello_size;
uint16_t msg_size;
msg->sender = *(plugin->env->my_identity);
msg->header.size = htons (msg_size);
msg->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_BROADCAST_BEACON);
- memcpy (&msg[1], hello, hello_size);
+ GNUNET_memcpy (&msg[1], hello, hello_size);
return msg_size;
}
+
static void
-udp_ipv4_broadcast_send (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+udp_ipv4_broadcast_send (void *cls)
{
- struct Plugin *plugin = cls;
+ struct BroadcastAddress *baddr = cls;
+ struct Plugin *plugin = baddr->plugin;
int sent;
uint16_t msg_size;
char buf[65536] GNUNET_ALIGN;
- struct BroadcastAddress *baddr;
- plugin->send_ipv4_broadcast_task = GNUNET_SCHEDULER_NO_TASK;
+ baddr->broadcast_task = NULL;
msg_size = prepare_beacon(plugin, (struct UDP_Beacon_Message *) &buf);
- sent = 0;
- baddr = plugin->ipv4_broadcast_head;
- /* just IPv4 */
- while ((msg_size > 0) && (baddr != NULL) && (baddr->addrlen == sizeof (struct sockaddr_in)))
+ if (0 != msg_size)
{
struct sockaddr_in *addr = (struct sockaddr_in *) baddr->addr;
addr->sin_port = htons (plugin->port);
-
sent = GNUNET_NETWORK_socket_sendto (plugin->sockv4, &buf, msg_size,
(const struct sockaddr *) addr,
baddr->addrlen);
"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);
+#if LINUX
+ /*
+ * Cryogenic
+ */
+ if (NULL != baddr->cryogenic_fd)
+ {
+ baddr->cryogenic_times.delay_msecs = (plugin->broadcast_interval.rel_value_us/1000.0)*0.5;
+ baddr->cryogenic_times.timeout_msecs = (plugin->broadcast_interval.rel_value_us/1000.0)*1.5;
+
+ if (ioctl(baddr->cryogenic_fd->fd,
+ PM_SET_DELAY_AND_TIMEOUT,
+ &baddr->cryogenic_times) < 0)
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "ioctl");
+ baddr->broadcast_task =
+ GNUNET_SCHEDULER_add_delayed (plugin->broadcast_interval,
+ &udp_ipv4_broadcast_send, baddr);
+ }
+ else
+ GNUNET_SCHEDULER_add_write_file (GNUNET_TIME_UNIT_FOREVER_REL,
+ baddr->cryogenic_fd,
+ &udp_ipv4_broadcast_send,
+ baddr);
+
+ }
+ else
+#endif
+ baddr->broadcast_task =
+ GNUNET_SCHEDULER_add_delayed (plugin->broadcast_interval,
+ &udp_ipv4_broadcast_send, baddr);
}
+
static void
-udp_ipv6_broadcast_send (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+udp_ipv6_broadcast_send (void *cls)
{
- struct Plugin *plugin = cls;
- int sent;
+ struct BroadcastAddress *baddr = cls;
+ struct Plugin *plugin = baddr->plugin;
+ ssize_t sent;
uint16_t msg_size;
char buf[65536] GNUNET_ALIGN;
+ const struct sockaddr_in6 *s6 = (const struct sockaddr_in6 *) baddr->addr;
- plugin->send_ipv6_broadcast_task = GNUNET_SCHEDULER_NO_TASK;
+ baddr->broadcast_task = NULL;
msg_size = prepare_beacon(plugin, (struct UDP_Beacon_Message *) &buf);
- sent = 0;
+ /* Note: unclear if this actually works to limit the multicast to
+ the specified interface as we're not (necessarily) using a
+ link-local multicast group and the kernel suggests that the
+ scope ID is only respected for link-local addresses; however,
+ if the scope ID is ignored, the kernel should just multicast
+ on ALL interfaces, which is merely slightly less efficient;
+ in that case, we might want to revert to only doing this
+ once, and not per interface (hard to test...) */
+ plugin->ipv6_multicast_address.sin6_scope_id = s6->sin6_scope_id;
sent = GNUNET_NETWORK_socket_sendto (plugin->sockv6, &buf, msg_size,
(const struct sockaddr *)
&plugin->ipv6_multicast_address,
sizeof (struct sockaddr_in6));
+ plugin->ipv6_multicast_address.sin6_scope_id = 0;
if (sent == GNUNET_SYSERR)
{
if ((ENETUNREACH == errno) || (ENETDOWN == errno))
else
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Sending IPv6 HELLO beacon broadcast with %i bytes to address %s\n",
- sent,
+ "Sending IPv6 HELLO beacon broadcast with %d bytes to address %s\n",
+ (int) 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);
+#if LINUX
+ /*
+ * Cryogenic
+ */
+ if (NULL != baddr->cryogenic_fd)
+ {
+ baddr->cryogenic_times.delay_msecs = (plugin->broadcast_interval.rel_value_us/1000.0)*0.5;
+ baddr->cryogenic_times.timeout_msecs = (plugin->broadcast_interval.rel_value_us/1000.0)*1.5;
+
+ if (ioctl(baddr->cryogenic_fd->fd,
+ PM_SET_DELAY_AND_TIMEOUT,
+ &baddr->cryogenic_times) < 0)
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "ioctl");
+ baddr->broadcast_task =
+ GNUNET_SCHEDULER_add_delayed (plugin->broadcast_interval,
+ &udp_ipv6_broadcast_send, baddr);
+ }
+ else
+ GNUNET_SCHEDULER_add_write_file (GNUNET_TIME_UNIT_FOREVER_REL,
+ baddr->cryogenic_fd,
+ &udp_ipv4_broadcast_send,
+ baddr);
+ }
+ else
+#endif
+ baddr->broadcast_task =
+ GNUNET_SCHEDULER_add_delayed (plugin->broadcast_interval,
+ &udp_ipv6_broadcast_send, baddr);
}
+/**
+ * Callback function invoked for each interface found.
+ *
+ * @param cls closure with the `struct Plugin`
+ * @param name name of the interface (can be NULL for unknown)
+ * @param isDefault is this presumably the default interface
+ * @param addr address of this interface (can be NULL for unknown or unassigned)
+ * @param broadcast_addr the broadcast address (can be NULL for unknown or unassigned)
+ * @param netmask the network mask (can be NULL for unknown or unassigned)
+ * @param addrlen length of the address
+ * @return #GNUNET_OK to continue iteration, #GNUNET_SYSERR to abort
+ */
static int
-iface_proc (void *cls, const char *name, int isDefault,
- const struct sockaddr *addr, const struct sockaddr *broadcast_addr,
+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;
+ struct BroadcastAddress *ba;
+ enum GNUNET_ATS_Network_Type network;
- if (addr != NULL)
+ if (NULL == addr)
+ return GNUNET_OK;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "address %s for interface %s %p\n ",
+ GNUNET_a2s (addr, addrlen), name, addr);
+ if (NULL == broadcast_addr)
+ return GNUNET_OK;
+ 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);
+
+ network = plugin->env->get_address_type (plugin->env->cls, broadcast_addr, addrlen);
+ if (GNUNET_ATS_NET_LOOPBACK == network)
{
- 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);
- }
+ /* Broadcasting on loopback does not make sense */
+ return GNUNET_YES;
}
- return GNUNET_OK;
-}
+ ba = GNUNET_new (struct BroadcastAddress);
+ ba->plugin = plugin;
+ ba->addr = GNUNET_malloc (addrlen);
+ GNUNET_memcpy (ba->addr, broadcast_addr, addrlen);
+ ba->addrlen = addrlen;
-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)
+ if ( (GNUNET_YES == plugin->enable_ipv4) &&
+ (NULL != plugin->sockv4) &&
+ (addrlen == sizeof (struct sockaddr_in)) )
{
- int yes = 1;
-
- if (GNUNET_NETWORK_socket_setsockopt
- (plugin->sockv4, SOL_SOCKET, SO_BROADCAST, &yes,
- sizeof (int)) != GNUNET_OK)
+#if LINUX
+ /*
+ * setup Cryogenic FD for ipv4 broadcasting
+ */
+ char *filename;
+
+ GNUNET_asprintf (&filename,
+ "/dev/cryogenic/%s",
+ name);
+ if (0 == ACCESS (name, R_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;
+ ba->cryogenic_fd =
+ GNUNET_DISK_file_open (filename,
+ GNUNET_DISK_OPEN_WRITE,
+ GNUNET_DISK_PERM_NONE);
}
+ GNUNET_free (filename);
+#endif
+ ba->broadcast_task =
+ GNUNET_SCHEDULER_add_now (&udp_ipv4_broadcast_send, ba);
}
-
- plugin->broadcast_ipv6 = GNUNET_NO;
- if (plugin->sockv6 != NULL)
+ if ((GNUNET_YES == plugin->enable_ipv6) &&
+ (NULL != plugin->sockv6) &&
+ (addrlen == sizeof (struct sockaddr_in6)))
{
- 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;
+ const struct sockaddr_in6 *s6 = (const struct sockaddr_in6 *) broadcast_addr;
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:
+ /* http://tools.ietf.org/html/rfc2553#section-5.2:
*
* IPV6_JOIN_GROUP
*
* 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;
+ * interface; we do this for each interface, so no need to use
+ * zero (anymore...).
+ */
+ multicastRequest.ipv6mr_interface = s6->sin6_scope_id;
/* Join the multicast group */
- if (GNUNET_NETWORK_socket_setsockopt
+ if (GNUNET_OK !=
+ GNUNET_NETWORK_socket_setsockopt
(plugin->sockv6, IPPROTO_IPV6, IPV6_JOIN_GROUP,
- (char *) &multicastRequest, sizeof (multicastRequest)) != GNUNET_OK)
+ &multicastRequest, sizeof (multicastRequest)))
{
LOG (GNUNET_ERROR_TYPE_WARNING,
"Failed to join IPv6 multicast group: IPv6 broadcasting not running\n");
}
else
{
- LOG (GNUNET_ERROR_TYPE_DEBUG, "IPv6 broadcasting running\n");
- plugin->send_ipv6_broadcast_task =
- GNUNET_SCHEDULER_add_now (&udp_ipv6_broadcast_send, plugin);
- plugin->broadcast_ipv6 = GNUNET_YES;
+#if LINUX
+ /*
+ * setup Cryogenic FD for ipv6 broadcasting
+ */
+ char *filename;
+
+ GNUNET_asprintf (&filename,
+ "/dev/cryogenic/%s",
+ name);
+ if (0 == ACCESS (name, R_OK))
+ {
+ ba->cryogenic_fd =
+ GNUNET_DISK_file_open (filename,
+ GNUNET_DISK_OPEN_WRITE,
+ GNUNET_DISK_PERM_NONE);
+ }
+ GNUNET_free (filename);
+#endif
+ ba->broadcast_task =
+ GNUNET_SCHEDULER_add_now (&udp_ipv6_broadcast_send, ba);
}
}
+ GNUNET_CONTAINER_DLL_insert (plugin->broadcast_head,
+ plugin->broadcast_tail, ba);
+ return GNUNET_OK;
}
+
+/**
+ * Setup broadcasting subsystem.
+ *
+ * @param plugin
+ * @param server_addrv6
+ * @param server_addrv4
+ */
void
-stop_broadcast (struct Plugin *plugin)
+setup_broadcast (struct Plugin *plugin,
+ struct sockaddr_in6 *server_addrv6,
+ struct sockaddr_in *server_addrv4)
{
- if (plugin->broadcast_ipv4)
+ if (GNUNET_YES ==
+ GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
+ "topology",
+ "FRIENDS-ONLY"))
{
- 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);
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("Disabling HELLO broadcasting due to friend-to-friend only configuration!\n"));
+ return;
+ }
- while (plugin->ipv4_broadcast_head != NULL)
- {
- struct BroadcastAddress *p = plugin->ipv4_broadcast_head;
+ /* always create tokenizers */
+ plugin->broadcast_mst =
+ GNUNET_SERVER_mst_create (&broadcast_mst_cb, plugin);
- GNUNET_CONTAINER_DLL_remove (plugin->ipv4_broadcast_head,
- plugin->ipv4_broadcast_tail, p);
- GNUNET_free (p->addr);
- GNUNET_free (p);
- }
- }
+ if (GNUNET_YES != plugin->enable_broadcasting)
+ return; /* We do not send, just receive */
- if (plugin->broadcast_ipv6)
+ /* create IPv4 broadcast socket */
+ if ((GNUNET_YES == plugin->enable_ipv4) && (NULL != plugin->sockv4))
{
- /* Create IPv6 multicast request */
- struct ipv6_mreq multicastRequest;
-
- multicastRequest.ipv6mr_multiaddr =
- plugin->ipv6_multicast_address.sin6_addr;
- multicastRequest.ipv6mr_interface = 0;
+ static int yes = 1;
- /* 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
+ (plugin->sockv4, SOL_SOCKET, SO_BROADCAST, &yes,
+ sizeof (int)) != GNUNET_OK)
{
- LOG (GNUNET_ERROR_TYPE_DEBUG, "IPv6 Broadcasting stopped\n");
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("Failed to set IPv4 broadcast option for broadcast socket on port %d\n"),
+ ntohs (server_addrv4->sin_port));
}
+ }
+ /* create IPv6 multicast socket */
+ if ((GNUNET_YES == plugin->enable_ipv6) && (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);
+ }
+ GNUNET_OS_network_interfaces_list (&iface_proc, plugin);
+}
+
- if (plugin->send_ipv6_broadcast_task != GNUNET_SCHEDULER_NO_TASK)
+/**
+ * Stop broadcasting subsystem.
+ *
+ * @param plugin
+ */
+void
+stop_broadcast (struct Plugin *plugin)
+{
+ if (GNUNET_YES == plugin->enable_broadcasting)
+ {
+ /* Disable broadcasting */
+ while (plugin->broadcast_head != NULL)
{
- GNUNET_SCHEDULER_cancel (plugin->send_ipv6_broadcast_task);
- plugin->send_ipv6_broadcast_task = GNUNET_SCHEDULER_NO_TASK;
+ struct BroadcastAddress *p = plugin->broadcast_head;
+
+ if (p->broadcast_task != NULL)
+ {
+ GNUNET_SCHEDULER_cancel (p->broadcast_task);
+ p->broadcast_task = NULL;
+ }
+ if ((GNUNET_YES == plugin->enable_ipv6) &&
+ (NULL != plugin->sockv6) &&
+ (p->addrlen == sizeof (struct sockaddr_in6)))
+ {
+ /* Create IPv6 multicast request */
+ struct ipv6_mreq multicastRequest;
+ const struct sockaddr_in6 *s6 = (const struct sockaddr_in6 *) p->addr;
+
+ multicastRequest.ipv6mr_multiaddr =
+ plugin->ipv6_multicast_address.sin6_addr;
+ multicastRequest.ipv6mr_interface = s6->sin6_scope_id;
+
+ /* Leave the multicast group */
+ if (GNUNET_OK ==
+ GNUNET_NETWORK_socket_setsockopt
+ (plugin->sockv6, IPPROTO_IPV6, IPV6_LEAVE_GROUP,
+ &multicastRequest, sizeof (multicastRequest)))
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "setsockopt");
+ }
+ else
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "IPv6 multicasting stopped\n");
+ }
+ }
+
+#if LINUX
+ GNUNET_DISK_file_close(p->cryogenic_fd);
+#endif
+ GNUNET_CONTAINER_DLL_remove (plugin->broadcast_head,
+ plugin->broadcast_tail, p);
+ GNUNET_free (p->addr);
+ GNUNET_free (p);
}
- if (plugin->broadcast_ipv6_mst != NULL)
- GNUNET_SERVER_mst_destroy (plugin->broadcast_ipv6_mst);
}
+ /* Destroy MSTs */
+ if (NULL != plugin->broadcast_mst)
+ {
+ GNUNET_SERVER_mst_destroy (plugin->broadcast_mst);
+ plugin->broadcast_mst = NULL;
+ }
}
/* end of plugin_transport_udp_broadcasting.c */
projects / oweals / gnunet.git / blobdiff