#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_protocols.h"
#include "gnunet_resolver_service.h"
*/
struct TCPProbeContext
{
+
+ /**
+ * Active probes are kept in a DLL.
+ */
+ struct TCPProbeContext *next;
+
+ /**
+ * Active probes are kept in a DLL.
+ */
+ struct TCPProbeContext *prev;
+
/**
* Probe connection.
*/
*/
struct LocalAddrList *prev;
+ /**
+ * Link to plugin.
+ */
+ struct Plugin *plugin;
+
+ /**
+ * Handle to NAT holes we've tried to punch for this address.
+ */
+ struct GNUNET_NAT_Handle *nat;
+
+ /**
+ * Pointer to a 'struct IPv4/V6TcpAddress' describing our external IP and port
+ * as obtained from the NAT by automatic port mapping.
+ */
+ void *external_nat_address;
+
+ /**
+ * Number of bytes in 'external_nat_address'
+ */
+ size_t ena_size;
+
/**
* Number of bytes of the address that follow
*/
struct GNUNET_CONTAINER_MultiHashMap *nat_wait_conns;
/**
- * The external address given to us by the user. Must be actual
- * outside visible address for NAT punching to work.
+ * The external address given to us by the user. Used for HELLOs
+ * and address validation.
*/
char *external_address;
/**
* The internal address given to us by the user (or discovered).
+ * Used for NAT traversal (ICMP method), but not as a 'validateable'
+ * address in HELLOs.
*/
char *internal_address;
*/
struct LocalAddrList *lal_tail;
+ /**
+ * List of active TCP probes.
+ */
+ struct TCPProbeContext *probe_head;
+
+ /**
+ * List of active TCP probes.
+ */
+ struct TCPProbeContext *probe_tail;
+
+ /**
+ * Handle for (DYN)DNS lookup of our external IP.
+ */
+ struct GNUNET_RESOLVER_RequestHandle *ext_dns;
+
/**
* ID of task used to update our addresses when one expires.
*/
*/
int behind_nat;
+ /**
+ * Has the NAT been punched?
+ */
+ int nat_punched;
+
/**
* Is this transport configured to allow connections to NAT'd peers?
*/
- int allow_nat;
+ int enable_nat_client;
+
+ /**
+ * Should we run the gnunet-nat-server?
+ */
+ int enable_nat_server;
/**
- * Should this transport advertise only NAT addresses (port set to 0)?
- * If not, all addresses will be duplicated for NAT punching and regular
- * ports.
+ * Are we allowed to try UPnP/PMP for NAT traversal?
*/
- int only_nat_addresses;
+ int enable_upnp;
};
+/**
+ * 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
+nat_port_map_callback (void *cls,
+ int add_remove,
+ const struct sockaddr *addr,
+ socklen_t addrlen)
+{
+ struct LocalAddrList *lal = cls;
+ struct Plugin *plugin = lal->plugin;
+ int af;
+ struct IPv4TcpAddress t4;
+ struct IPv6TcpAddress t6;
+ void *arg;
+ uint16_t args;
+
+ /* convert 'addr' to our internal format */
+ af = addr->sa_family;
+ switch (af)
+ {
+ case AF_INET:
+ t4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
+ t6.t6_port = ((struct sockaddr_in *) addr)->sin_port;
+ arg = &t4;
+ args = sizeof (t4);
+ break;
+ case AF_INET6:
+ memcpy (&t6.ipv6_addr,
+ &((struct sockaddr_in6 *) addr)->sin6_addr,
+ sizeof (struct in6_addr));
+ t6.t6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
+ arg = &t6;
+ args = sizeof (t6);
+ break;
+ default:
+ GNUNET_break (0);
+ return;
+ }
+
+ /* modify our published address list */
+ if (GNUNET_YES == add_remove)
+ {
+ plugin->env->notify_address (plugin->env->cls,
+ "tcp",
+ arg, args, GNUNET_TIME_UNIT_FOREVER_REL);
+ GNUNET_free_non_null (lal->external_nat_address);
+ lal->external_nat_address = GNUNET_memdup (arg, args);
+ lal->ena_size = args;
+ }
+ else
+ {
+ plugin->env->notify_address (plugin->env->cls,
+ "tcp",
+ arg, args, GNUNET_TIME_UNIT_ZERO);
+ GNUNET_free_non_null (lal->external_nat_address);
+ lal->ena_size = 0;
+ }
+}
+
+
/**
* Add the given address to the list of 'local' addresses, thereby
* making it a 'legal' address for this peer to have.
size_t arg_size)
{
struct LocalAddrList *lal;
+ struct sockaddr_in v4;
+ struct sockaddr_in6 v6;
+ const struct sockaddr *sa;
+ socklen_t salen;
lal = plugin->lal_head;
while (NULL != lal)
lal = lal->next;
}
lal = GNUNET_malloc (sizeof (struct LocalAddrList) + arg_size);
+ lal->plugin = plugin;
lal->size = arg_size;
memcpy (&lal[1], arg, arg_size);
GNUNET_CONTAINER_DLL_insert (plugin->lal_head,
plugin->lal_tail,
lal);
+ if (plugin->open_port == 0)
+ return; /* we're not listening at all... */
+ if (arg_size == sizeof (struct in_addr))
+ {
+ memset (&v4, 0, sizeof (v4));
+ v4.sin_family = AF_INET;
+ v4.sin_port = htons (plugin->open_port);
+ memcpy (&v4.sin_addr, arg, arg_size);
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ v4.sin_len = sizeof (struct sockaddr_in);
+#endif
+ sa = (const struct sockaddr*) &v4;
+ salen = sizeof (v4);
+ }
+ else if (arg_size == sizeof (struct in6_addr))
+ {
+ memset (&v6, 0, sizeof (v6));
+ v6.sin6_family = AF_INET6;
+ v6.sin6_port = htons (plugin->open_port);
+ memcpy (&v6.sin6_addr, arg, arg_size);
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ v6.sin6_len = sizeof (struct sockaddr_in6);
+#endif
+ sa = (const struct sockaddr*) &v6;
+ salen = sizeof (v6);
+ }
+ else
+ {
+ GNUNET_break (0);
+ return;
+ }
+ if ( (plugin->behind_nat == GNUNET_YES) &&
+ (plugin->enable_upnp == GNUNET_YES) )
+ lal->nat = GNUNET_NAT_register (sa, salen,
+ &nat_port_map_callback,
+ lal);
}
}
+/**
+ * Check if the given address is in the list of 'mapped' addresses.
+ *
+ * @param plugin the plugin
+ * @param arg the address, either a 'struct IPv4TcpAddress' or a 'struct IPv6TcpAddress'
+ * @param arg_size number of bytes in arg
+ * @return GNUNET_OK if this is one of our IPs, GNUNET_SYSERR if not
+ */
+static int
+check_mapped_addr (struct Plugin *plugin,
+ const void *arg,
+ size_t arg_size)
+{
+ struct LocalAddrList *lal;
+
+ lal = plugin->lal_head;
+ while (NULL != lal)
+ {
+ if ( (lal->ena_size == arg_size) &&
+ (0 == memcmp (lal->external_nat_address, arg, arg_size)) )
+ return GNUNET_OK;
+ lal = lal->next;
+ }
+ return GNUNET_SYSERR;
+}
+
+
/**
* Function called for a quick conversion of the binary address to
* a numeric address. Note that the caller must not free the
#if DEBUG_TCP
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
"tcp",
- "Disconnecting from `%4s' at %s (session %p).\n",
+ "Disconnecting from `%4s' at %s.\n",
GNUNET_i2s (&session->target),
(session->connect_addr != NULL) ?
tcp_address_to_string (session->plugin,
session->connect_addr,
- session->connect_alen) : "*",
- session);
+ session->connect_alen) : "*");
#endif
/* remove from session list */
prev = NULL;
GNUNET_SERVER_receive_done (session->client,
GNUNET_SYSERR);
}
- if (session->client != NULL)
+ else if (session->client != NULL)
GNUNET_SERVER_client_drop (session->client);
GNUNET_STATISTICS_update (session->plugin->env->stats,
gettext_noop ("# TCP sessions active"),
* gnunet-nat-client to send dummy ICMP responses.
*
* @param plugin the plugin for this transport
- * @param addr the address of the peer (IPv4-only)
+ * @param sa the address of the peer (IPv4-only)
*/
static void
run_gnunet_nat_client (struct Plugin *plugin,
char port_as_string[6];
struct GNUNET_OS_Process *proc;
+ if (plugin->internal_address == NULL)
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING,
+ "tcp",
+ _("Internal IP address not known, cannot use ICMP NAT traversal method\n"));
+ return;
+ }
GNUNET_assert (sa->sin_family == AF_INET);
if (NULL == inet_ntop (AF_INET,
&sa->sin_addr,
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
"tcp",
_("Running gnunet-nat-client %s %s %u\n"),
- plugin->external_address,
+ plugin->internal_address,
inet4,
(unsigned int) plugin->adv_port);
#endif
NULL,
"gnunet-nat-client",
"gnunet-nat-client",
- plugin->external_address,
+ plugin->internal_address,
inet4,
port_as_string,
NULL);
+ if (NULL == proc)
+ return;
/* we know that the gnunet-nat-client will terminate virtually
instantly */
GNUNET_OS_process_wait (proc);
return -1; /* NAT client only works with IPv4 addresses */
- if ((plugin->allow_nat == GNUNET_YES) && (is_natd == GNUNET_YES) &&
- (GNUNET_NO == GNUNET_CONTAINER_multihashmap_contains(plugin->nat_wait_conns, &target->hashPubKey)))
+ if ( (plugin->enable_nat_client == GNUNET_YES) &&
+ (is_natd == GNUNET_YES) &&
+ (GNUNET_NO == GNUNET_CONTAINER_multihashmap_contains(plugin->nat_wait_conns,
+ &target->hashPubKey)) )
{
#if DEBUG_TCP_NAT
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
session = create_session (plugin,
target,
NULL,
- is_natd);
+ GNUNET_YES);
/* create new message entry */
pm = GNUNET_malloc (sizeof (struct PendingMessage) + msgbuf_size);
run_gnunet_nat_client (plugin, &a4);
return 0;
}
- if ( (plugin->allow_nat == GNUNET_YES) &&
+ if ( (plugin->enable_nat_client == GNUNET_YES) &&
(is_natd == GNUNET_YES) &&
- (GNUNET_YES == GNUNET_CONTAINER_multihashmap_contains(plugin->nat_wait_conns, &target->hashPubKey)) )
+ (GNUNET_YES == GNUNET_CONTAINER_multihashmap_contains(plugin->nat_wait_conns,
+ &target->hashPubKey)) )
{
/* Only do one NAT punch attempt per peer identity */
return -1;
target,
GNUNET_SERVER_connect_socket (plugin->server,
sa),
- is_natd);
+ GNUNET_NO);
session->connect_addr = GNUNET_malloc (addrlen);
memcpy (session->connect_addr,
addr,
/**
- * 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.
+ * Check if the given port is plausible (must be either our listen
+ * port or our advertised port), or any port if we are behind NAT
+ * and do not have a port open. 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)
+check_port (struct Plugin *plugin,
+ uint16_t in_port)
{
- if ( (plugin->behind_nat == GNUNET_YES) && (in_port == 0) )
- return GNUNET_OK;
- if ( (plugin->only_nat_addresses == GNUNET_YES) &&
- (plugin->behind_nat == GNUNET_YES) )
- return GNUNET_SYSERR; /* odd case... */
if ((in_port == plugin->adv_port) || (in_port == plugin->open_port))
return GNUNET_OK;
return GNUNET_SYSERR;
if (addrlen == sizeof (struct IPv4TcpAddress))
{
v4 = (struct IPv4TcpAddress *) addr;
+ if (GNUNET_OK ==
+ check_mapped_addr (plugin, v4, sizeof (struct IPv4TcpAddress)))
+ return GNUNET_OK;
if (GNUNET_OK !=
check_port (plugin, ntohs (v4->t_port)))
return GNUNET_SYSERR;
if (GNUNET_OK !=
- check_local_addr (plugin, &v4->ipv4_addr, sizeof (uint32_t)))
+ check_local_addr (plugin, &v4->ipv4_addr, sizeof (struct in_addr)))
return GNUNET_SYSERR;
}
else
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
+ if (GNUNET_OK ==
+ check_mapped_addr (plugin, v6, sizeof (struct IPv6TcpAddress)))
+ return GNUNET_OK;
if (GNUNET_OK !=
check_port (plugin, ntohs (v6->t6_port)))
return GNUNET_SYSERR;
#if DEBUG_TCP_NAT
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
"tcp",
- "handle_tcp_nat_probe Found address `%s' for incoming connection %p\n",
- GNUNET_a2s (vaddr, alen),
- client);
+ "Found address `%s' for incoming connection\n",
+ GNUNET_a2s (vaddr, alen));
#endif
switch (((const struct sockaddr *)vaddr)->sa_family)
{
#if DEBUG_TCP
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
"tcp",
- "Received %s message from a `%4s/%p'.\n",
+ "Received %s message from `%4s'.\n",
"WELCOME",
- GNUNET_i2s (&wm->clientIdentity), client);
+ GNUNET_i2s (&wm->clientIdentity));
#endif
GNUNET_STATISTICS_update (plugin->env->stats,
gettext_noop ("# TCP WELCOME messages received"),
#if DEBUG_TCP_NAT
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
"tcp",
- "Received %s message from a `%4s/%p', creating session\n",
+ "Received %s message from a `%4s', creating new session\n",
"WELCOME",
- GNUNET_i2s (&wm->clientIdentity), client);
+ GNUNET_i2s (&wm->clientIdentity));
#endif
GNUNET_SERVER_client_keep (client);
session = create_session (plugin,
#if DEBUG_TCP_NAT
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
"tcp",
- "Found address `%s' for incoming connection %p\n",
- GNUNET_a2s (vaddr, alen),
- client);
+ "Found address `%s' for incoming connection\n",
+ GNUNET_a2s (vaddr, alen));
#endif
if (alen == sizeof (struct sockaddr_in))
{
"Did not obtain TCP socket address for incoming connection\n");
#endif
}
-#if DEBUG_TCP
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Creating new session %p for connection %p\n",
- session, client);
-#endif
process_pending_messages (session);
}
else
{
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
"tcp",
- "Found address `%s' (already have session) for incoming connection %p\n",
- GNUNET_a2s (vaddr, alen),
- client);
+ "Found address `%s' (already have session)\n",
+ GNUNET_a2s (vaddr, alen));
}
#endif
}
session->receive_delay_task = GNUNET_SCHEDULER_NO_TASK;
delay = session->plugin->env->receive (session->plugin->env->cls,
&session->target,
+ NULL,
NULL, 0,
session,
NULL, 0);
gettext_noop ("# bytes received via TCP"),
ntohs (message->size),
GNUNET_NO);
- delay = plugin->env->receive (plugin->env->cls, &session->target, message, 1,
+ struct GNUNET_TRANSPORT_ATS_Information distance[2];
+ 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);
+ delay = plugin->env->receive (plugin->env->cls, &session->target, message,
+ (const struct GNUNET_TRANSPORT_ATS_Information *) &distance,
+ 2,
session,
(GNUNET_YES == session->inbound) ? NULL : session->connect_addr,
(GNUNET_YES == session->inbound) ? 0 : session->connect_alen);
#if DEBUG_TCP
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
"tcp",
- "Destroying session of `%4s' with %s (%p) due to network-level disconnect.\n",
+ "Destroying session of `%4s' with %s due to network-level disconnect.\n",
GNUNET_i2s (&session->target),
(session->connect_addr != NULL) ?
tcp_address_to_string (session->plugin,
session->connect_addr,
- session->connect_alen) : "*",
- client);
+ session->connect_alen) : "*");
#endif
disconnect_session (session);
}
/**
* Add the IP of our network interface to the list of
- * our external IP addresses.
+ * our internal IP addresses.
*
* @param cls the 'struct Plugin*'
* @param name name of the interface
{
case AF_INET:
t4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
- GNUNET_assert(NULL != inet_ntop(AF_INET, &t4.ipv4_addr, &buf[0], INET_ADDRSTRLEN));
- if ((plugin->bind_address != NULL) && (0 != strcmp(buf, plugin->bind_address)))
+ GNUNET_assert (NULL != inet_ntop(AF_INET,
+ &t4.ipv4_addr,
+ buf,
+ sizeof (buf)));
+ if ( (plugin->bind_address != NULL) &&
+ (0 != strcmp(buf, plugin->bind_address)) )
{
+#if DEBUG_TCP
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
"tcp",
- "Not notifying transport of address %s\n",
+ "Not notifying transport of address `%s' (redundant)\n",
GNUNET_a2s (addr, addrlen));
+#endif
return GNUNET_OK;
}
- add_to_address_list (plugin, &t4.ipv4_addr, sizeof (uint32_t));
- if ((plugin->behind_nat == GNUNET_YES) && (plugin->only_nat_addresses == GNUNET_YES))
- t4.t_port = htons(0);
- else if (plugin->behind_nat == GNUNET_YES) /* We are behind NAT, but will advertise NAT and normal addresses */
+ if ( (plugin->internal_address == NULL) &&
+ (isDefault) )
+ plugin->internal_address = GNUNET_strdup (buf);
+ add_to_address_list (plugin, &t4.ipv4_addr, sizeof (struct in_addr));
+ if (plugin->behind_nat == GNUNET_YES)
{
+ /* Also advertise as NAT (with port 0) */
t4_nat.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
- t4_nat.t_port = htons(plugin->adv_port);
+ t4_nat.t_port = htons(0);
arg_nat = &t4_nat;
- }
- else
- t4.t_port = htons (plugin->adv_port);
+ }
+ t4.t_port = htons (plugin->adv_port);
arg = &t4;
args = sizeof (t4);
break;
case AF_INET6:
if ( (IN6_IS_ADDR_LINKLOCAL (&((struct sockaddr_in6 *) addr)->sin6_addr)) ||
- (GNUNET_YES == GNUNET_CONFIGURATION_get_value_yesno(plugin->env->cfg, "transport-tcp", "DISABLEV6")) )
+ (GNUNET_YES == GNUNET_CONFIGURATION_get_value_yesno(plugin->env->cfg,
+ "transport-tcp",
+ "DISABLEV6")) )
{
/* skip link local addresses */
return GNUNET_OK;
memcpy (&t6.ipv6_addr,
&((struct sockaddr_in6 *) addr)->sin6_addr,
sizeof (struct in6_addr));
- add_to_address_list (plugin, &t6.ipv6_addr, sizeof (struct in6_addr));
- if ((plugin->behind_nat == GNUNET_YES) && (plugin->only_nat_addresses == GNUNET_YES))
- t6.t6_port = htons(0);
- else if (plugin->behind_nat == GNUNET_YES) /* We are behind NAT, but will advertise NAT and normal addresses */
+ add_to_address_list (plugin,
+ &t6.ipv6_addr,
+ sizeof (struct in6_addr));
+ if (plugin->behind_nat == GNUNET_YES)
{
+ /* Also advertise as NAT (with port 0) */
memcpy (&t6_nat.ipv6_addr,
&((struct sockaddr_in6 *) addr)->sin6_addr,
sizeof (struct in6_addr));
- t6_nat.t6_port = htons(plugin->adv_port);
+ t6_nat.t6_port = htons(0);
arg_nat = &t6;
}
- else
- t6.t6_port = htons (plugin->adv_port);
+ t6.t6_port = htons (plugin->adv_port);
arg = &t6;
args = sizeof (t6);
break;
void *buf)
{
struct TCPProbeContext *tcp_probe_ctx = cls;
+ struct Plugin *plugin = tcp_probe_ctx->plugin;
size_t ret;
tcp_probe_ctx->transmit_handle = NULL;
+ GNUNET_CONTAINER_DLL_remove (plugin->probe_head,
+ plugin->probe_tail,
+ tcp_probe_ctx);
if (buf == NULL)
- return 0;
+ {
+ GNUNET_CONNECTION_destroy (tcp_probe_ctx->sock, GNUNET_NO);
+ GNUNET_free(tcp_probe_ctx);
+ return 0;
+ }
GNUNET_assert(size >= sizeof(tcp_probe_ctx->message));
memcpy(buf, &tcp_probe_ctx->message, sizeof(tcp_probe_ctx->message));
GNUNET_SERVER_connect_socket (tcp_probe_ctx->plugin->server,
struct TCPProbeContext *tcp_probe_ctx;
struct GNUNET_CONNECTION_Handle *sock;
- if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
+ if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
return;
memset (mybuf, 0, sizeof(mybuf));
bytes = GNUNET_DISK_file_read(plugin->server_stdout_handle,
"Finished reading from server stdout with code: %d\n",
bytes);
#endif
+ /* FIXME: consider process_wait here? */
return;
}
/* construct socket address of sender */
memset (&sin_addr, 0, sizeof (sin_addr));
sin_addr.sin_family = AF_INET;
- sin_addr.sin_port = htons((uint16_t) port);
#if HAVE_SOCKADDR_IN_SIN_LEN
sin_addr.sin_len = sizeof (sin_addr);
#endif
plugin);
return;
}
-
+ sin_addr.sin_port = htons((uint16_t) port);
#if DEBUG_TCP_NAT
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
"tcp",
sizeof(struct GNUNET_PeerIdentity));
tcp_probe_ctx->plugin = plugin;
tcp_probe_ctx->sock = sock;
+ GNUNET_CONTAINER_DLL_insert (plugin->probe_head,
+ plugin->probe_tail,
+ tcp_probe_ctx);
tcp_probe_ctx->transmit_handle
= GNUNET_CONNECTION_notify_transmit_ready (sock,
ntohs (tcp_probe_ctx->message.header.size),
* Start the gnunet-nat-server process for users behind NAT.
*
* @param plugin the transport plugin
- *
* @return GNUNET_YES if process was started, GNUNET_SYSERR on error
*/
static int
-tcp_transport_start_nat_server(struct Plugin *plugin)
+tcp_transport_start_nat_server (struct Plugin *plugin)
{
+ if (plugin->internal_address == NULL)
+ return GNUNET_SYSERR;
plugin->server_stdout = GNUNET_DISK_pipe (GNUNET_YES,
GNUNET_NO,
GNUNET_YES);
* GNUNET_SYSERR on error
*/
static int
-check_gnunet_nat_binary(const char *binary)
+check_gnunet_nat_binary (const char *binary)
{
struct stat statbuf;
char *p;
#endif
}
+
+/**
+ * Our (external) hostname was resolved.
+ *
+ * @param cls the 'struct Plugin'
+ * @param addr NULL on error, otherwise result of DNS lookup
+ * @param addrlen number of bytes in addr
+ */
+static void
+process_external_ip (void *cls,
+ const struct sockaddr *addr,
+ socklen_t addrlen)
+{
+ struct Plugin *plugin = cls;
+ const struct sockaddr_in *s;
+ struct IPv4TcpAddress t4;
+
+
+ plugin->ext_dns = NULL;
+ if (addr == NULL)
+ return;
+ GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
+ s = (const struct sockaddr_in *) addr;
+ t4.ipv4_addr = s->sin_addr.s_addr;
+ if ( (plugin->behind_nat == GNUNET_YES) &&
+ (plugin->enable_nat_server == GNUNET_YES) )
+ {
+ t4.t_port = htons(0);
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
+ "tcp",
+ "Notifying transport of address %s:%d\n",
+ plugin->external_address,
+ 0);
+ }
+ else
+ {
+ t4.t_port = htons(plugin->adv_port);
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
+ "tcp",
+ "Notifying transport of address %s:%d\n",
+ plugin->external_address,
+ (int) plugin->adv_port);
+ }
+ add_to_address_list (plugin,
+ &t4.ipv4_addr,
+ sizeof (struct in_addr));
+ plugin->env->notify_address (plugin->env->cls,
+ "tcp",
+ &t4, sizeof(t4),
+ GNUNET_TIME_UNIT_FOREVER_REL);
+}
+
+
/**
* Entry point for the plugin.
*
unsigned long long bport;
unsigned int i;
int behind_nat;
- int allow_nat;
- int only_nat_addresses;
+ int nat_punched;
+ int enable_nat_client;
+ int enable_nat_server;
+ int enable_upnp;
char *internal_address;
char *external_address;
struct sockaddr_in in_addr;
- struct IPv4TcpAddress t4;
-
- service = GNUNET_SERVICE_start ("transport-tcp", env->cfg);
- if (service == NULL)
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING,
- "tcp",
- _("Failed to start service.\n"));
- return NULL;
- }
+ struct GNUNET_TIME_Relative idle_timeout;
behind_nat = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
"transport-tcp",
"BEHIND_NAT");
- if (GNUNET_YES == behind_nat)
+ nat_punched = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
+ "transport-tcp",
+ "NAT_PUNCHED");
+ enable_nat_client = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
+ "transport-tcp",
+ "ENABLE_NAT_CLIENT");
+ enable_nat_server = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
+ "transport-tcp",
+ "ENABLE_NAT_SERVER");
+ enable_upnp = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
+ "transport-tcp",
+ "ENABLE_UPNP");
+
+ if ( (GNUNET_YES == enable_nat_server) &&
+ (GNUNET_YES != check_gnunet_nat_binary("gnunet-nat-server")) )
{
- /* We are behind nat (according to the user) */
- if (check_gnunet_nat_binary("gnunet-nat-server") == GNUNET_YES)
- {
- behind_nat = GNUNET_YES;
- }
- else
- {
- behind_nat = GNUNET_NO;
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Configuration specified you are behind a NAT, but %s is not installed properly (SUID bit not set)!\n"),
- "gnunet-nat-server");
- }
+ enable_nat_server = GNUNET_NO;
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ _("Configuration requires `%s', but binary is not installed properly (SUID bit not set). Option disabled.\n"),
+ "gnunet-nat-server");
}
- allow_nat = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
- "transport-tcp",
- "ALLOW_NAT");
- if (GNUNET_YES == allow_nat)
+
+ if ( (GNUNET_YES == enable_nat_client) &&
+ (GNUNET_YES != check_gnunet_nat_binary("gnunet-nat-client")) )
{
- if (check_gnunet_nat_binary("gnunet-nat-client") == GNUNET_YES)
- {
- allow_nat = GNUNET_YES; /* We will try to connect to NAT'd peers */
- }
- else
- {
- allow_nat = GNUNET_NO;
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Configuration specified you want to connect to NATed peers, but %s is not installed properly (SUID bit not set)!\n"),
- "gnunet-nat-client");
- }
+ enable_nat_client = GNUNET_NO;
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ _("Configuration requires `%s', but binary is not installed properly (SUID bit not set). Option disabled.\n"),
+ "gnunet-nat-client");
}
-
- only_nat_addresses = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
- "transport-tcp",
- "ONLY_NAT_ADDRESSES");
-
+
external_address = NULL;
- if ( ( (GNUNET_YES == behind_nat) ||
- (GNUNET_YES == allow_nat) ) &&
- (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_string (env->cfg,
- "transport-tcp",
- "EXTERNAL_ADDRESS",
- &external_address)) )
+ if (GNUNET_OK ==
+ GNUNET_CONFIGURATION_have_value (env->cfg,
+ "transport-tcp",
+ "EXTERNAL_ADDRESS"))
{
- GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
- "tcp",
- _("EXTERNAL_ADDRESS option required in configuration (either BEHIND_NAT or ALLOW_NAT set to YES)!\n"));
- GNUNET_SERVICE_stop (service);
- return NULL;
+ (void) GNUNET_CONFIGURATION_get_value_string (env->cfg,
+ "transport-tcp",
+ "EXTERNAL_ADDRESS",
+ &external_address);
}
if ( (external_address != NULL) &&
(inet_pton(AF_INET, external_address, &in_addr.sin_addr) != 1) )
{
+
GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING,
"tcp",
_("Malformed %s `%s' given in configuration!\n"),
"EXTERNAL_ADDRESS",
external_address);
+ return NULL;
+ }
+ if ( (external_address == NULL) &&
+ (nat_punched == GNUNET_YES) )
+ {
+ nat_punched = GNUNET_NO;
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ _("Configuration says NAT was punched, but `%s' is not given. Option ignored.\n"),
+ "EXTERNAL_ADDRESS");
+ }
+
+ if (GNUNET_YES == nat_punched)
+ {
+ enable_nat_server = GNUNET_NO;
+ enable_upnp = GNUNET_NO;
}
internal_address = NULL;
- if ( (GNUNET_YES == behind_nat) &&
- (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_string (env->cfg,
- "transport-tcp",
- "INTERNAL_ADDRESS",
- &internal_address)) )
+ if (GNUNET_OK ==
+ GNUNET_CONFIGURATION_have_value (env->cfg,
+ "transport-tcp",
+ "INTERNAL_ADDRESS"))
{
- GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
- "tcp",
- _("Require INTERNAL_ADDRESS in configuration!\n"));
- GNUNET_SERVICE_stop (service);
- GNUNET_free_non_null(external_address);
- return NULL;
+ (void) GNUNET_CONFIGURATION_get_value_string (env->cfg,
+ "transport-tcp",
+ "INTERNAL_ADDRESS",
+ &internal_address);
}
if ( (internal_address != NULL) &&
_("Malformed %s `%s' given in configuration!\n"),
"INTERNAL_ADDRESS",
internal_address);
+ GNUNET_free_non_null(internal_address);
+ GNUNET_free_non_null(external_address);
+ return NULL;
}
aport = 0;
"transport-tcp");
GNUNET_free_non_null(external_address);
GNUNET_free_non_null(internal_address);
- GNUNET_SERVICE_stop (service);
return NULL;
}
if (aport == 0)
aport = bport;
+ if (bport == 0)
+ aport = 0;
+
+ if (bport != 0)
+ {
+ service = GNUNET_SERVICE_start ("transport-tcp", env->cfg);
+ if (service == NULL)
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING,
+ "tcp",
+ _("Failed to start service.\n"));
+ return NULL;
+ }
+ }
+ else
+ service = NULL;
+
plugin = GNUNET_malloc (sizeof (struct Plugin));
plugin->open_port = bport;
plugin->adv_port = aport;
plugin->external_address = external_address;
plugin->internal_address = internal_address;
plugin->behind_nat = behind_nat;
- plugin->allow_nat = allow_nat;
- plugin->only_nat_addresses = only_nat_addresses;
+ plugin->nat_punched = nat_punched;
+ plugin->enable_nat_client = enable_nat_client;
+ plugin->enable_nat_server = enable_nat_server;
+ plugin->enable_upnp = enable_upnp;
plugin->env = env;
plugin->lsock = NULL;
api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
api->check_address = &tcp_plugin_check_address;
api->address_to_string = &tcp_address_to_string;
plugin->service = service;
- plugin->server = GNUNET_SERVICE_get_server (service);
+ if (service != NULL)
+ {
+ plugin->server = GNUNET_SERVICE_get_server (service);
+ }
+ else
+ {
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_time (env->cfg,
+ "transport-tcp",
+ "TIMEOUT",
+ &idle_timeout))
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
+ "tcp",
+ _("Failed to find option %s in section %s!\n"),
+ "TIMEOUT",
+ "transport-tcp");
+ GNUNET_free_non_null(external_address);
+ GNUNET_free_non_null(internal_address);
+ GNUNET_free (api);
+ return NULL;
+ }
+ plugin->server = GNUNET_SERVER_create_with_sockets (NULL, NULL, NULL,
+ idle_timeout, GNUNET_YES);
+ }
plugin->handlers = GNUNET_malloc (sizeof (my_handlers));
memcpy (plugin->handlers, my_handlers, sizeof (my_handlers));
for (i = 0;
- i <
- sizeof (my_handlers) / sizeof (struct GNUNET_SERVER_MessageHandler);
+ i < sizeof (my_handlers) / sizeof (struct GNUNET_SERVER_MessageHandler);
i++)
plugin->handlers[i].callback_cls = plugin;
GNUNET_SERVER_add_handlers (plugin->server, plugin->handlers);
+ GNUNET_SERVER_disconnect_notify (plugin->server,
+ &disconnect_notify,
+ plugin);
+ GNUNET_OS_network_interfaces_list (&process_interfaces, plugin);
- if (plugin->behind_nat == GNUNET_YES)
+ if ( (plugin->behind_nat == GNUNET_YES) &&
+ (plugin->enable_nat_server == GNUNET_YES) &&
+ (GNUNET_YES != tcp_transport_start_nat_server(plugin)) )
{
- if (GNUNET_YES != tcp_transport_start_nat_server(plugin))
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
- "tcp",
- _("Failed to start %s required for NAT in %s!\n"),
- "gnunet-nat-server"
- "transport-tcp");
- GNUNET_free_non_null(external_address);
- GNUNET_free_non_null(internal_address);
- GNUNET_SERVICE_stop (service);
- GNUNET_free (api);
- return NULL;
- }
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
+ "tcp",
+ _("Failed to start %s required for NAT in %s!\n"),
+ "gnunet-nat-server"
+ "transport-tcp");
+ GNUNET_free_non_null(external_address);
+ GNUNET_free_non_null(internal_address);
+ if (service != NULL)
+ GNUNET_SERVICE_stop (service);
+ else
+ GNUNET_SERVER_destroy (plugin->server);
+ GNUNET_free (api);
+ return NULL;
}
- if (allow_nat == GNUNET_YES)
+ if (enable_nat_client == GNUNET_YES)
{
- plugin->nat_wait_conns = GNUNET_CONTAINER_multihashmap_create(100);
- GNUNET_assert(plugin->nat_wait_conns != NULL);
+ plugin->nat_wait_conns = GNUNET_CONTAINER_multihashmap_create(16);
+ GNUNET_assert (plugin->nat_wait_conns != NULL);
}
- GNUNET_log_from (GNUNET_ERROR_TYPE_INFO,
- "tcp",
- _("TCP transport listening on port %llu\n"),
- bport);
+ if (bport != 0)
+ GNUNET_log_from (GNUNET_ERROR_TYPE_INFO,
+ "tcp",
+ _("TCP transport listening on port %llu\n"),
+ bport);
+ else
+ GNUNET_log_from (GNUNET_ERROR_TYPE_INFO,
+ "tcp",
+ _("TCP transport not listening on any port (client only)\n"));
if (aport != bport)
GNUNET_log_from (GNUNET_ERROR_TYPE_INFO,
"tcp",
_("TCP transport advertises itself as being on port %llu\n"),
aport);
- GNUNET_SERVER_disconnect_notify (plugin->server,
- &disconnect_notify,
- plugin);
if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_string (env->cfg,
"transport-tcp",
"BINDTO",
&plugin->bind_address))
{
- GNUNET_log(GNUNET_ERROR_TYPE_INFO,
- _("Binding TCP plugin to specific address: `%s'\n"),
- plugin->bind_address);
- }
-
- if (plugin->behind_nat == GNUNET_NO)
- {
- GNUNET_OS_network_interfaces_list (&process_interfaces, plugin);
+ GNUNET_log_from (GNUNET_ERROR_TYPE_INFO,
+ "tcp",
+ _("Binding TCP plugin to specific address: `%s'\n"),
+ plugin->bind_address);
}
plugin->hostname_dns = GNUNET_RESOLVER_hostname_resolve (env->cfg,
&process_hostname_ips,
plugin);
- if ( (plugin->behind_nat == GNUNET_YES) &&
- (inet_pton(AF_INET, plugin->external_address, &t4.ipv4_addr) == 1) )
+ if (plugin->external_address != NULL)
{
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Notifying transport of address %s:0\n",
- plugin->external_address);
- t4.t_port = htons(0);
- add_to_address_list (plugin, &t4.ipv4_addr, sizeof (uint32_t));
- plugin->env->notify_address (plugin->env->cls,
- "tcp",
- &t4, sizeof(t4), GNUNET_TIME_UNIT_FOREVER_REL);
- }
- else if ((plugin->external_address != NULL) &&
- (inet_pton(AF_INET, plugin->external_address, &t4.ipv4_addr) == 1) )
- {
- t4.t_port = htons(plugin->adv_port);
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "tcp",
- "Notifying transport of address %s:%d\n",
- plugin->external_address,
- plugin->adv_port);
- add_to_address_list (plugin, &t4.ipv4_addr, sizeof (uint32_t));
- plugin->env->notify_address (plugin->env->cls,
- "tcp",
- &t4, sizeof(t4), GNUNET_TIME_UNIT_FOREVER_REL);
+ plugin->ext_dns = GNUNET_RESOLVER_ip_get (env->cfg,
+ plugin->external_address,
+ AF_INET,
+ GNUNET_TIME_UNIT_MINUTES,
+ &process_external_ip,
+ plugin);
}
-
return api;
}
struct Plugin *plugin = api->cls;
struct Session *session;
struct LocalAddrList *lal;
+ struct TCPProbeContext *tcp_probe;
+ if (plugin->ext_dns != NULL)
+ {
+ GNUNET_RESOLVER_request_cancel (plugin->ext_dns);
+ plugin->ext_dns = NULL;
+ }
while (NULL != (session = plugin->sessions))
disconnect_session (session);
if (NULL != plugin->hostname_dns)
GNUNET_RESOLVER_request_cancel (plugin->hostname_dns);
plugin->hostname_dns = NULL;
}
- GNUNET_SERVICE_stop (plugin->service);
+ if (plugin->service != NULL)
+ GNUNET_SERVICE_stop (plugin->service);
+ else
+ GNUNET_SERVER_destroy (plugin->server);
GNUNET_free (plugin->handlers);
while (NULL != (lal = plugin->lal_head))
{
GNUNET_CONTAINER_DLL_remove (plugin->lal_head,
plugin->lal_tail,
lal);
+ if (lal->nat != NULL)
+ GNUNET_NAT_unregister (lal->nat);
+ GNUNET_free_non_null (lal->external_nat_address);
GNUNET_free (lal);
}
+ while (NULL != (tcp_probe = plugin->probe_head))
+ {
+ GNUNET_CONTAINER_DLL_remove (plugin->probe_head,
+ plugin->probe_tail,
+ tcp_probe);
+ GNUNET_CONNECTION_destroy (tcp_probe->sock, GNUNET_NO);
+ GNUNET_free (tcp_probe);
+ }
- if (plugin->behind_nat == GNUNET_YES)
+ if ((plugin->behind_nat == GNUNET_YES) &&
+ (plugin->enable_nat_server == GNUNET_YES))
{
if (0 != GNUNET_OS_process_kill (plugin->server_proc, SIGTERM))
GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "kill");
projects / oweals / gnunet.git / blobdiff