gnunet_daemon_vpn_SOURCES = \
gnunet-daemon-vpn.c gnunet-daemon-vpn.h \
- gnunet-daemon-vpn-helper.c gnunet-daemon-vpn-helper.h \
- gnunet-helper-vpn-api.c gnunet-helper-vpn-api.h \
gnunet-vpn-checksum.c gnunet-vpn-checksum.h
gnunet_daemon_vpn_LDADD = \
$(top_builddir)/src/core/libgnunetcore.la \
gnunet_daemon_exit_SOURCES = \
gnunet-daemon-exit.c \
- gnunet-helper-vpn-api.c gnunet-helper-vpn-api.h \
gnunet-vpn-checksum.c gnunet-vpn-checksum.h
gnunet_daemon_exit_LDADD = \
$(top_builddir)/src/core/libgnunetcore.la \
/*
This file is part of GNUnet.
- (C) 2010 Christian Grothoff
+ (C) 2010, 2012 Christian Grothoff
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
#include <string.h>
#include "gnunet-vpn-packet.h"
-#include "gnunet-helper-vpn-api.h"
#include "gnunet-vpn-checksum.h"
-GNUNET_SCHEDULER_TaskIdentifier shs_task;
-
/**
* The handle to the configuration used throughout the process
*/
/**
* The handle to the helper
*/
-struct GNUNET_VPN_HELPER_Handle *helper_handle;
+static struct GNUNET_HELPER_Handle *helper_handle;
+
+/**
+ * Arguments to the exit helper.
+ */
+static char *exit_argv[7];
/**
* Final status code.
* source-port and destination-port to a struct redirect_state
*/
static struct GNUNET_CONTAINER_MultiHashMap *udp_connections;
+
static struct GNUNET_CONTAINER_Heap *udp_connections_heap;
+
static struct GNUNET_CONTAINER_MultiHashMap *tcp_connections;
+
static struct GNUNET_CONTAINER_Heap *tcp_connections_heap;
/**
struct GNUNET_CONTAINER_MultiHashMap *hashmap;
GNUNET_HashCode hash;
- enum
- { SERVICE, REMOTE } type;
+ enum { SERVICE, REMOTE } type;
/**
* The source-address and -port of this connection
};
/**
- * This hashmaps saves interesting things about the configured services
+ * This hashmaps saves interesting things about the configured UDP services
*/
static struct GNUNET_CONTAINER_MultiHashMap *udp_services;
+
+/**
+ * This hashmaps saves interesting things about the configured TCP services
+ */
+
static struct GNUNET_CONTAINER_MultiHashMap *tcp_services;
struct tunnel_notify_queue
struct GNUNET_MESH_TransmitHandle *th;
};
+
/**
* Function that frees everything from a hashmap
*/
cleanup (void *cls GNUNET_UNUSED,
const struct GNUNET_SCHEDULER_TaskContext *tskctx)
{
- GNUNET_assert (0 != (tskctx->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN));
-
- GNUNET_CONTAINER_multihashmap_iterate (udp_connections, free_iterate, NULL);
-
- GNUNET_CONTAINER_multihashmap_iterate (tcp_connections, free_iterate, NULL);
+ unsigned int i;
+ GNUNET_assert (0 != (tskctx->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN));
if (mesh_handle != NULL)
{
GNUNET_MESH_disconnect (mesh_handle);
mesh_handle = NULL;
}
+ if (helper_handle != NULL)
+ {
+ GNUNET_HELPER_stop (helper_handle);
+ helper_handle = NULL;
+ }
+ GNUNET_CONTAINER_multihashmap_iterate (udp_connections, &free_iterate, NULL);
+ GNUNET_CONTAINER_multihashmap_iterate (tcp_connections, &free_iterate, NULL);
+ for (i=0;i<5;i++)
+ GNUNET_free_non_null (exit_argv[i]);
}
static void *
while (proto != UDP);
}
-/**
- * Start the helper-process
- *
- * If cls != NULL it is assumed that this function is called as a result of a dying
- * helper. cls is then taken as handle to the old helper and is cleaned up.
- */
-static void
-start_helper_and_schedule (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- return;
-
- if (cls != NULL)
- cleanup_helper (cls);
- cls = NULL;
-
- char *ifname;
- char *ipv6addr;
- char *ipv6prefix;
- char *ipv4addr;
- char *ipv4mask;
-
- if (GNUNET_SYSERR ==
- GNUNET_CONFIGURATION_get_value_string (cfg, "exit", "IFNAME", &ifname))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "No entry 'IFNAME' in configuration!\n");
- exit (1);
- }
-
- if (GNUNET_SYSERR ==
- GNUNET_CONFIGURATION_get_value_string (cfg, "exit", "IPV6ADDR",
- &ipv6addr))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "No entry 'IPV6ADDR' in configuration!\n");
- exit (1);
- }
-
- if (GNUNET_SYSERR ==
- GNUNET_CONFIGURATION_get_value_string (cfg, "exit", "IPV6PREFIX",
- &ipv6prefix))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "No entry 'IPV6PREFIX' in configuration!\n");
- exit (1);
- }
-
- if (GNUNET_SYSERR ==
- GNUNET_CONFIGURATION_get_value_string (cfg, "exit", "IPV4ADDR",
- &ipv4addr))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "No entry 'IPV4ADDR' in configuration!\n");
- exit (1);
- }
-
- if (GNUNET_SYSERR ==
- GNUNET_CONFIGURATION_get_value_string (cfg, "exit", "IPV4MASK",
- &ipv4mask))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "No entry 'IPV4MASK' in configuration!\n");
- exit (1);
- }
-
- /* Start the helper
- * Messages get passed to the function message_token
- * When the helper dies, this function will be called again with the
- * helper_handle as cls.
- */
- helper_handle =
- start_helper (ifname, ipv6addr, ipv6prefix, ipv4addr, ipv4mask,
- "exit-gnunet", start_helper_and_schedule, message_token,
- NULL);
- GNUNET_free (ipv6addr);
- GNUNET_free (ipv6prefix);
- GNUNET_free (ipv4addr);
- GNUNET_free (ipv4mask);
- GNUNET_free (ifname);
-}
static void
prepare_ipv4_packet (size_t len, uint16_t pktlen, void *payload,
* At this point it would be possible to check against some kind of ACL.
*/
- char *buf;
size_t len;
/* Prepare the state.
len =
sizeof (struct GNUNET_MessageHeader) + sizeof (struct pkt_tun) +
sizeof (struct ip6_hdr) + pkt_len;
- buf = alloca (len);
-
- memset (buf, 0, len);
-
- switch (serv->version)
{
- case 4:
- prepare_ipv4_packet (len, pkt_len, pkt, IPPROTO_TCP, &serv->v4.ip4address,
- tunnel, state, (struct ip_pkt *) buf);
- break;
- case 6:
- prepare_ipv6_packet (len, pkt_len, pkt, IPPROTO_TCP, &serv->v6.ip6address,
- tunnel, state, (struct ip6_pkt *) buf);
-
- break;
- default:
- GNUNET_assert (0);
- break;
- }
-
- hash_redirect_info (&state->hash, &state->redirect_info,
- serv->version == 4 ? 4 : 16);
+ char buf[len];
- if (GNUNET_NO ==
- GNUNET_CONTAINER_multihashmap_contains (tcp_connections, &state->hash))
- {
- GNUNET_CONTAINER_multihashmap_put (tcp_connections, &state->hash, state,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
+ memset (buf, 0, len);
+ switch (serv->version)
+ {
+ case 4:
+ prepare_ipv4_packet (len, pkt_len, pkt, IPPROTO_TCP, &serv->v4.ip4address,
+ tunnel, state, (struct ip_pkt *) buf);
+ break;
+ case 6:
+ prepare_ipv6_packet (len, pkt_len, pkt, IPPROTO_TCP, &serv->v6.ip6address,
+ tunnel, state, (struct ip6_pkt *) buf);
+
+ break;
+ default:
+ GNUNET_assert (0);
+ break;
+ }
- state->heap_node =
- GNUNET_CONTAINER_heap_insert (tcp_connections_heap, state,
- GNUNET_TIME_absolute_get ().abs_value);
+ hash_redirect_info (&state->hash, &state->redirect_info,
+ serv->version == 4 ? 4 : 16);
+
+ if (GNUNET_NO ==
+ GNUNET_CONTAINER_multihashmap_contains (tcp_connections, &state->hash))
+ {
+ GNUNET_CONTAINER_multihashmap_put (tcp_connections, &state->hash, state,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
+
+ state->heap_node =
+ GNUNET_CONTAINER_heap_insert (tcp_connections_heap, state,
+ GNUNET_TIME_absolute_get ().abs_value);
+
+ if (GNUNET_CONTAINER_heap_get_size (tcp_connections_heap) >
+ max_tcp_connections)
+ GNUNET_SCHEDULER_add_now (collect_connections, tcp_connections_heap);
+ }
+ else
+ GNUNET_free (state);
- if (GNUNET_CONTAINER_heap_get_size (tcp_connections_heap) >
- max_tcp_connections)
- GNUNET_SCHEDULER_add_now (collect_connections, tcp_connections_heap);
+ /* FIXME: here, flow-control with mesh would be nice to have... */
+ (void) GNUNET_HELPER_send (helper_handle,
+ (const struct GNUNET_MessageHeader*) buf,
+ GNUNET_YES,
+ NULL, NULL);
}
- else
- GNUNET_free (state);
-
- (void) GNUNET_DISK_file_write (helper_handle->fh_to_helper, buf, len);
return GNUNET_YES;
}
+
static int
receive_tcp_remote (void *cls GNUNET_UNUSED, struct GNUNET_MESH_Tunnel *tunnel,
void **tunnel_ctx GNUNET_UNUSED,
else
GNUNET_free (state);
- (void) GNUNET_DISK_file_write (helper_handle->fh_to_helper, buf, len);
+ /* FIXME: here, flow-control with mesh would be nice to have... */
+ (void) GNUNET_HELPER_send (helper_handle,
+ (const struct GNUNET_MessageHeader*) buf,
+ GNUNET_YES,
+ NULL, NULL);
return GNUNET_YES;
}
else
GNUNET_free (state);
- (void) GNUNET_DISK_file_write (helper_handle->fh_to_helper, buf, len);
+ (void) GNUNET_HELPER_send (helper_handle,
+ (const struct GNUNET_MessageHeader*) buf,
+ GNUNET_YES,
+ NULL, NULL);
return GNUNET_YES;
}
else
GNUNET_free (state);
- (void) GNUNET_DISK_file_write (helper_handle->fh_to_helper, buf, len);
+ (void) GNUNET_HELPER_send (helper_handle,
+ (const struct GNUNET_MessageHeader*) buf,
+ GNUNET_YES,
+ NULL, NULL);
return GNUNET_YES;
}
}
+
/**
* @brief Main function that will be run by the scheduler.
*
const char *cfgfile GNUNET_UNUSED,
const struct GNUNET_CONFIGURATION_Handle *cfg_)
{
- cfg = cfg_;
+ char *ifname;
+ char *ipv6addr;
+ char *ipv6prefix;
+ char *ipv4addr;
+ char *ipv4mask;
+ cfg = cfg_;
connect_to_mesh ();
-
udp_connections = GNUNET_CONTAINER_multihashmap_create (65536);
udp_connections_heap =
GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
udp_services = GNUNET_CONTAINER_multihashmap_create (65536);
tcp_services = GNUNET_CONTAINER_multihashmap_create (65536);
-
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_number (cfg, "exit", "MAX_UDP_CONNECTIONS",
&max_udp_connections))
&max_tcp_connections))
max_tcp_connections = 256;
GNUNET_CONFIGURATION_iterate_sections (cfg, read_service_conf, NULL);
- GNUNET_SCHEDULER_add_now (start_helper_and_schedule, NULL);
+
+ if (GNUNET_SYSERR ==
+ GNUNET_CONFIGURATION_get_value_string (cfg, "exit", "IFNAME", &ifname))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "No entry 'IFNAME' in configuration!\n");
+ exit (1);
+ }
+
+ if (GNUNET_SYSERR ==
+ GNUNET_CONFIGURATION_get_value_string (cfg, "exit", "IPV6ADDR",
+ &ipv6addr))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "No entry 'IPV6ADDR' in configuration!\n");
+ exit (1);
+ }
+
+ if (GNUNET_SYSERR ==
+ GNUNET_CONFIGURATION_get_value_string (cfg, "exit", "IPV6PREFIX",
+ &ipv6prefix))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "No entry 'IPV6PREFIX' in configuration!\n");
+ exit (1);
+ }
+
+ if (GNUNET_SYSERR ==
+ GNUNET_CONFIGURATION_get_value_string (cfg, "exit", "IPV4ADDR",
+ &ipv4addr))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "No entry 'IPV4ADDR' in configuration!\n");
+ exit (1);
+ }
+
+ if (GNUNET_SYSERR ==
+ GNUNET_CONFIGURATION_get_value_string (cfg, "exit", "IPV4MASK",
+ &ipv4mask))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "No entry 'IPV4MASK' in configuration!\n");
+ exit (1);
+ }
+ exit_argv[0] = GNUNET_strdup ("exit-gnunet");
+ exit_argv[1] = ifname;
+ exit_argv[2] = ipv6addr;
+ exit_argv[3] = ipv6prefix;
+ exit_argv[4] = ipv4addr;
+ exit_argv[5] = ipv4mask;
+ exit_argv[6] = NULL;
+ helper_handle = GNUNET_HELPER_start ("gnunet-helper-vpn", exit_argv,
+ &message_token, NULL);
GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &cleanup, cls);
}
+++ /dev/null
-/*
- This file is part of GNUnet.
- (C) 2010 Christian Grothoff
-
- 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 vpn/gnunet-daemon-vpn-helper.c
- * @brief
- * @author Philipp Toelke
- */
-#include <platform.h>
-#include <gnunet_common.h>
-#include <gnunet_client_lib.h>
-#include <gnunet_os_lib.h>
-#include <gnunet_mesh_service.h>
-#include <gnunet_protocols.h>
-#include <gnunet_server_lib.h>
-#include <gnunet_container_lib.h>
-#include <block_dns.h>
-#include <gnunet_configuration_lib.h>
-#include <gnunet_applications.h>
-#include <gnunet_dns_service.h>
-
-#include "gnunet-daemon-vpn.h"
-#include "gnunet-daemon-vpn-helper.h"
-#include "gnunet-vpn-packet.h"
-#include "gnunet-vpn-checksum.h"
-#include "gnunet-helper-vpn-api.h"
-
-struct GNUNET_VPN_HELPER_Handle *helper_handle;
-
-extern struct GNUNET_CLIENT_TransmitHandle *dns_transmit_handle;
-
-/**
- * The tunnels that will be used to send tcp- and udp-packets
- */
-static struct GNUNET_MESH_Tunnel *tcp_tunnel;
-static struct GNUNET_MESH_Tunnel *udp_tunnel;
-
-/**
- * Start the helper-process
- *
- * If cls != NULL it is assumed that this function is called as a result of a dying
- * helper. cls is then taken as handle to the old helper and is cleaned up.
- * {{{
- */
-void
-start_helper_and_schedule (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- shs_task = GNUNET_SCHEDULER_NO_TASK;
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- return;
-
- if (cls != NULL)
- cleanup_helper (cls);
- cls = NULL;
-
- char *ifname;
- char *ipv6addr;
- char *ipv6prefix;
- char *ipv4addr;
- char *ipv4mask;
-
- if (GNUNET_SYSERR ==
- GNUNET_CONFIGURATION_get_value_string (cfg, "vpn", "IFNAME", &ifname))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "No entry 'IFNAME' in configuration!\n");
- exit (1);
- }
-
- if (GNUNET_SYSERR ==
- GNUNET_CONFIGURATION_get_value_string (cfg, "vpn", "IPV6ADDR", &ipv6addr))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "No entry 'IPV6ADDR' in configuration!\n");
- exit (1);
- }
-
- if (GNUNET_SYSERR ==
- GNUNET_CONFIGURATION_get_value_string (cfg, "vpn", "IPV6PREFIX",
- &ipv6prefix))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "No entry 'IPV6PREFIX' in configuration!\n");
- exit (1);
- }
-
- if (GNUNET_SYSERR ==
- GNUNET_CONFIGURATION_get_value_string (cfg, "vpn", "IPV4ADDR", &ipv4addr))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "No entry 'IPV4ADDR' in configuration!\n");
- exit (1);
- }
-
- if (GNUNET_SYSERR ==
- GNUNET_CONFIGURATION_get_value_string (cfg, "vpn", "IPV4MASK", &ipv4mask))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "No entry 'IPV4MASK' in configuration!\n");
- exit (1);
- }
-
- /* Start the helper
- * Messages get passed to the function message_token
- * When the helper dies, this function will be called again with the
- * helper_handle as cls.
- */
- helper_handle =
- start_helper (ifname, ipv6addr, ipv6prefix, ipv4addr, ipv4mask,
- "vpn-gnunet", start_helper_and_schedule, message_token,
- NULL);
-
- GNUNET_free (ipv6addr);
- GNUNET_free (ipv6prefix);
- GNUNET_free (ipv4addr);
- GNUNET_free (ipv4mask);
- GNUNET_free (ifname);
-
- /* Tell the dns-service to rehijack the dns-port
- * The routing-table gets flushed if an interface disappears.
- */
- GNUNET_DNS_restart_hijack (dns_handle);
- GNUNET_SCHEDULER_add_write_file (GNUNET_TIME_UNIT_FOREVER_REL,
- helper_handle->fh_to_helper, &helper_write,
- NULL);
-}
-
-/*}}}*/
-
-static void *
-initialize_tunnel_state (int addrlen, struct GNUNET_MESH_TransmitHandle *th)
-{
- struct tunnel_state *ts = GNUNET_malloc (sizeof *ts);
-
- ts->addrlen = addrlen;
- ts->th = th;
- return ts;
-}
-
-/**
- * Send an dns-answer-packet to the helper
- */
-void
-helper_write (void *cls GNUNET_UNUSED,
- const struct GNUNET_SCHEDULER_TaskContext *tsdkctx)
-{
- if (tsdkctx->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN)
- return;
-
- struct answer_packet_list *ans = answer_proc_head;
-
- if (NULL == ans)
- return;
-
- size_t len = ntohs (ans->pkt.hdr.size);
-
- GNUNET_assert (ans->pkt.subtype == GNUNET_DNS_ANSWER_TYPE_IP);
-
- GNUNET_assert (20 == sizeof (struct ip_hdr));
- GNUNET_assert (8 == sizeof (struct udp_pkt));
-
- size_t data_len = len - sizeof (struct answer_packet) + 1;
-
- void *buf;
- size_t pkt_len;
-
- if (ans->pkt.addrlen == 16)
- {
- size_t net_len =
- sizeof (struct ip6_hdr) + sizeof (struct udp_dns) + data_len;
- pkt_len =
- sizeof (struct GNUNET_MessageHeader) + sizeof (struct pkt_tun) +
- net_len;
-
- struct ip6_udp_dns *pkt = alloca (pkt_len);
-
- GNUNET_assert (pkt != NULL);
- memset (pkt, 0, pkt_len);
-
- /* set the gnunet-header */
- pkt->shdr.size = htons (pkt_len);
- pkt->shdr.type = htons (GNUNET_MESSAGE_TYPE_VPN_HELPER);
-
- /* set the tun-header (no flags and ethertype of IPv4) */
- pkt->tun.flags = 0;
- pkt->tun.type = htons (0x86dd);
-
- memcpy (&pkt->ip6_hdr.sadr, ans->pkt.from, 16);
- memcpy (&pkt->ip6_hdr.dadr, ans->pkt.to, 16);
-
- /* set the udp-header */
- pkt->udp_dns.udp_hdr.spt = htons (53);
- pkt->udp_dns.udp_hdr.dpt = ans->pkt.dst_port;
- pkt->udp_dns.udp_hdr.len = htons (net_len - sizeof (struct ip6_hdr));
- pkt->udp_dns.udp_hdr.crc = 0;
- uint32_t sum = 0;
-
- sum = calculate_checksum_update (sum, (uint16_t *) & pkt->ip6_hdr.sadr, 16);
- sum = calculate_checksum_update (sum, (uint16_t *) & pkt->ip6_hdr.dadr, 16);
- uint32_t tmp = (pkt->udp_dns.udp_hdr.len & 0xffff);
-
- sum = calculate_checksum_update (sum, (uint16_t *) & tmp, 4);
- tmp = htons (((pkt->ip6_hdr.nxthdr & 0x00ff)));
- sum = calculate_checksum_update (sum, (uint16_t *) & tmp, 4);
-
- sum =
- calculate_checksum_update (sum, (uint16_t *) & pkt->udp_dns.udp_hdr,
- ntohs (net_len - sizeof (struct ip6_hdr)));
- pkt->udp_dns.udp_hdr.crc = calculate_checksum_end (sum);
-
- pkt->ip6_hdr.version = 6;
- pkt->ip6_hdr.paylgth = net_len - sizeof (struct ip6_hdr);
- pkt->ip6_hdr.nxthdr = IPPROTO_UDP;
- pkt->ip6_hdr.hoplmt = 0xff;
-
- memcpy (&pkt->udp_dns.data, ans->pkt.data, data_len);
- buf = pkt;
- }
- else if (ans->pkt.addrlen == 4)
- {
- size_t net_len =
- sizeof (struct ip_hdr) + sizeof (struct udp_dns) + data_len;
- pkt_len =
- sizeof (struct GNUNET_MessageHeader) + sizeof (struct pkt_tun) +
- net_len;
-
- struct ip_udp_dns *pkt = alloca (pkt_len);
-
- GNUNET_assert (pkt != NULL);
- memset (pkt, 0, pkt_len);
-
- /* set the gnunet-header */
- pkt->shdr.size = htons (pkt_len);
- pkt->shdr.type = htons (GNUNET_MESSAGE_TYPE_VPN_HELPER);
-
- /* set the tun-header (no flags and ethertype of IPv4) */
- pkt->tun.flags = 0;
- pkt->tun.type = htons (0x0800);
-
- /* set the ip-header */
- pkt->ip_hdr.version = 4;
- pkt->ip_hdr.hdr_lngth = 5;
- pkt->ip_hdr.diff_serv = 0;
- pkt->ip_hdr.tot_lngth = htons (net_len);
- pkt->ip_hdr.ident = 0;
- pkt->ip_hdr.flags = 0;
- pkt->ip_hdr.frag_off = 0;
- pkt->ip_hdr.ttl = 255;
- pkt->ip_hdr.proto = IPPROTO_UDP;
- pkt->ip_hdr.chks = 0; /* Will be calculated later */
-
- memcpy (&pkt->ip_hdr.sadr, ans->pkt.from, 4);
- memcpy (&pkt->ip_hdr.dadr, ans->pkt.to, 4);
-
- pkt->ip_hdr.chks =
- calculate_ip_checksum ((uint16_t *) & pkt->ip_hdr, 5 * 4);
-
- /* set the udp-header */
- pkt->udp_dns.udp_hdr.spt = htons (53);
- pkt->udp_dns.udp_hdr.dpt = ans->pkt.dst_port;
- pkt->udp_dns.udp_hdr.len = htons (net_len - sizeof (struct ip_hdr));
- pkt->udp_dns.udp_hdr.crc = 0; /* Optional for IPv4 */
-
- memcpy (&pkt->udp_dns.data, ans->pkt.data, data_len);
- buf = pkt;
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Wrong addrlen = %d\n",
- ans->pkt.addrlen);
- GNUNET_assert (0);
- return; /* convince compiler that we're done here */
- }
-
- GNUNET_CONTAINER_DLL_remove (answer_proc_head, answer_proc_tail, ans);
- GNUNET_free (ans);
-
- if (GNUNET_DISK_file_write (helper_handle->fh_to_helper, buf, pkt_len) < 0)
- {
- cleanup_helper (helper_handle);
- GNUNET_SCHEDULER_add_now (start_helper_and_schedule, NULL);
- return;
- }
-
- /* if more packets are available, reschedule */
- if (answer_proc_head != NULL)
- GNUNET_SCHEDULER_add_write_file (GNUNET_TIME_UNIT_FOREVER_REL,
- helper_handle->fh_to_helper, &helper_write,
- NULL);
-}
-
-/**
- * Receive packets from the helper-process
- */
-void
-message_token (void *cls GNUNET_UNUSED, void *client GNUNET_UNUSED,
- const struct GNUNET_MessageHeader *message)
-{
- GNUNET_assert (ntohs (message->type) == GNUNET_MESSAGE_TYPE_VPN_HELPER);
-
- struct tun_pkt *pkt_tun = (struct tun_pkt *) message;
- GNUNET_HashCode *key;
-
- /* ethertype is ipv6 */
- if (ntohs (pkt_tun->tun.type) == 0x86dd)
- {
- struct ip6_pkt *pkt6 = (struct ip6_pkt *) message;
-
- GNUNET_assert (pkt6->ip6_hdr.version == 6);
- struct ip6_tcp *pkt6_tcp;
- struct ip6_udp *pkt6_udp;
- struct ip6_icmp *pkt6_icmp;
-
- pkt6_udp = NULL; /* make compiler happy */
- switch (pkt6->ip6_hdr.nxthdr)
- {
- case IPPROTO_UDP:
- pkt6_udp = (struct ip6_udp *) pkt6;
- /* Send dns-packets to the service-dns */
- if (ntohs (pkt6_udp->udp_hdr.dpt) == 53)
- {
- /* 9 = 8 for the udp-header + 1 for the unsigned char data[1]; */
- GNUNET_DNS_queue_request_v6 (dns_handle,
- &pkt6->ip6_hdr.dadr,
- &pkt6->ip6_hdr.sadr,
- ntohs (pkt6_udp->udp_hdr.spt),
- ntohs (pkt6_udp->udp_hdr.len) - 8,
- (const void*) pkt6_udp->data);
-
- break;
- }
- /* fall through */
- case IPPROTO_TCP:
- pkt6_tcp = (struct ip6_tcp *) pkt6;
-
- if ((key = address6_mapping_exists (&pkt6->ip6_hdr.dadr)) != NULL)
- {
- struct map_entry *me = GNUNET_CONTAINER_multihashmap_get (hashmap, key);
-
- GNUNET_assert (me != NULL);
- GNUNET_free (key);
-
- size_t size =
- sizeof (struct GNUNET_MESH_Tunnel *) +
- sizeof (struct GNUNET_MessageHeader) + sizeof (GNUNET_HashCode) +
- ntohs (pkt6->ip6_hdr.paylgth);
-
- struct GNUNET_MESH_Tunnel **cls = GNUNET_malloc (size);
- struct GNUNET_MessageHeader *hdr =
- (struct GNUNET_MessageHeader *) (cls + 1);
- GNUNET_HashCode *hc = (GNUNET_HashCode *) (hdr + 1);
-
- hdr->size =
- htons (sizeof (struct GNUNET_MessageHeader) +
- sizeof (GNUNET_HashCode) + ntohs (pkt6->ip6_hdr.paylgth));
-
- GNUNET_MESH_ApplicationType app_type = 0; /* fix compiler uninitialized warning... */
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "me->addrlen is %d\n",
- me->addrlen);
- if (me->addrlen == 0)
- {
- /* This is a mapping to a gnunet-service */
- memcpy (hc, &me->desc.service_descriptor, sizeof (GNUNET_HashCode));
-
- if (IPPROTO_UDP == pkt6->ip6_hdr.nxthdr &&
- (me->desc.service_type & htonl (GNUNET_DNS_SERVICE_TYPE_UDP)) &&
- (port_in_ports (me->desc.ports, pkt6_udp->udp_hdr.dpt) ||
- testBit (me->additional_ports, ntohs (pkt6_udp->udp_hdr.dpt))))
- {
- hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_SERVICE_UDP);
-
- memcpy (hc + 1, &pkt6_udp->udp_hdr, ntohs (pkt6_udp->udp_hdr.len));
-
- }
- else if (IPPROTO_TCP == pkt6->ip6_hdr.nxthdr &&
- (me->desc.service_type & htonl (GNUNET_DNS_SERVICE_TYPE_TCP))
- && (port_in_ports (me->desc.ports, pkt6_tcp->tcp_hdr.dpt)))
- {
- hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_SERVICE_TCP);
-
- memcpy (hc + 1, &pkt6_tcp->tcp_hdr, ntohs (pkt6->ip6_hdr.paylgth));
-
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "pip: %d\n",
- port_in_ports (me->desc.ports, pkt6_tcp->tcp_hdr.dpt));
- GNUNET_assert (0);
- }
- if (me->tunnel == NULL && NULL != cls)
- {
- *cls =
- GNUNET_MESH_tunnel_create (mesh_handle,
- initialize_tunnel_state (16, NULL),
- &send_pkt_to_peer, NULL, cls);
-
- GNUNET_MESH_peer_request_connect_add (*cls,
- (struct GNUNET_PeerIdentity *)
- &me->desc.peer);
- me->tunnel = *cls;
- }
- else if (NULL != cls)
- {
- *cls = me->tunnel;
- send_pkt_to_peer (cls, (struct GNUNET_PeerIdentity *) 1, NULL);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Queued to send IPv6 to peer %x, type %d\n",
- *((unsigned int *) &me->desc.peer), ntohs (hdr->type));
- }
- }
- else
- {
- /* This is a mapping to a "real" address */
- struct remote_addr *s = (struct remote_addr *) hc;
-
- s->addrlen = me->addrlen;
- memcpy (s->addr, me->addr, me->addrlen);
- s->proto = pkt6->ip6_hdr.nxthdr;
- if (s->proto == IPPROTO_UDP)
- {
- hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_REMOTE_UDP);
- memcpy (hc + 1, &pkt6_udp->udp_hdr, ntohs (pkt6_udp->udp_hdr.len));
- app_type = GNUNET_APPLICATION_TYPE_INTERNET_UDP_GATEWAY;
- if (NULL != udp_tunnel)
- me->tunnel = udp_tunnel;
- }
- else if (s->proto == IPPROTO_TCP)
- {
- hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_REMOTE_TCP);
- memcpy (hc + 1, &pkt6_tcp->tcp_hdr, ntohs (pkt6->ip6_hdr.paylgth));
- app_type = GNUNET_APPLICATION_TYPE_INTERNET_TCP_GATEWAY;
- if (NULL != tcp_tunnel)
- me->tunnel = tcp_tunnel;
- }
- else
- {
- GNUNET_assert (0);
- }
- if (me->tunnel == NULL && NULL != cls)
- {
- *cls =
- GNUNET_MESH_tunnel_create (mesh_handle,
- initialize_tunnel_state (16, NULL),
- &send_pkt_to_peer, NULL, cls);
-
- GNUNET_MESH_peer_request_connect_by_type (*cls, app_type);
- me->tunnel = *cls;
- if (GNUNET_APPLICATION_TYPE_INTERNET_UDP_GATEWAY == app_type)
- udp_tunnel = *cls;
- else if (GNUNET_APPLICATION_TYPE_INTERNET_TCP_GATEWAY == app_type)
- tcp_tunnel = *cls;
- }
- else if (NULL != cls)
- {
- *cls = me->tunnel;
- send_pkt_to_peer (cls, (struct GNUNET_PeerIdentity *) 1, NULL);
- }
- }
- }
- else
- {
- char pbuf[INET6_ADDRSTRLEN];
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Packet to %s, which has no mapping\n",
- inet_ntop (AF_INET6,
- &pkt6->ip6_hdr.dadr,
- pbuf,
- sizeof (pbuf)));
- }
- break;
- case 0x3a:
- /* ICMPv6 */
- pkt6_icmp = (struct ip6_icmp *) pkt6;
- /* If this packet is an icmp-echo-request and a mapping exists, answer */
- if (pkt6_icmp->icmp_hdr.type == 0x80 &&
- (key = address6_mapping_exists (&pkt6->ip6_hdr.dadr)) != NULL)
- {
- GNUNET_free (key);
- pkt6_icmp = GNUNET_malloc (ntohs (pkt6->shdr.size));
- memcpy (pkt6_icmp, pkt6, ntohs (pkt6->shdr.size));
- GNUNET_SCHEDULER_add_now (&send_icmp6_response, pkt6_icmp);
- }
- break;
- }
- }
- /* ethertype is ipv4 */
- else if (ntohs (pkt_tun->tun.type) == 0x0800)
- {
- struct ip_pkt *pkt = (struct ip_pkt *) message;
- struct ip_udp *udp = (struct ip_udp *) message;
- struct ip_tcp *pkt_tcp;
- struct ip_udp *pkt_udp;
- struct ip_icmp *pkt_icmp;
-
- GNUNET_assert (pkt->ip_hdr.version == 4);
-
- /* Send dns-packets to the service-dns */
- if (pkt->ip_hdr.proto == IPPROTO_UDP && ntohs (udp->udp_hdr.dpt) == 53)
- {
- GNUNET_DNS_queue_request_v4 (dns_handle,
- &pkt->ip_hdr.dadr,
- &pkt->ip_hdr.sadr,
- ntohs (udp->udp_hdr.spt),
- ntohs (udp->udp_hdr.len) - 8,
- (const void*) udp->data);
- }
- else
- {
- uint32_t dadr = pkt->ip_hdr.dadr.s_addr;
- unsigned char *c = (unsigned char *) &dadr;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Packet to %d.%d.%d.%d, proto %x\n",
- c[0], c[1], c[2], c[3], pkt->ip_hdr.proto);
- switch (pkt->ip_hdr.proto)
- {
- case IPPROTO_TCP:
- case IPPROTO_UDP:
- pkt_tcp = (struct ip_tcp *) pkt;
- pkt_udp = (struct ip_udp *) pkt;
-
- if ((key = address4_mapping_exists (dadr)) != NULL)
- {
- struct map_entry *me =
- GNUNET_CONTAINER_multihashmap_get (hashmap, key);
- GNUNET_assert (me != NULL);
- GNUNET_free (key);
-
- size_t size =
- sizeof (struct GNUNET_MESH_Tunnel *) +
- sizeof (struct GNUNET_MessageHeader) + sizeof (GNUNET_HashCode) +
- ntohs (pkt->ip_hdr.tot_lngth) - 4 * pkt->ip_hdr.hdr_lngth;
-
- struct GNUNET_MESH_Tunnel **cls = GNUNET_malloc (size);
- struct GNUNET_MessageHeader *hdr =
- (struct GNUNET_MessageHeader *) (cls + 1);
- GNUNET_HashCode *hc = (GNUNET_HashCode *) (hdr + 1);
-
- hdr->size =
- htons (sizeof (struct GNUNET_MessageHeader) +
- sizeof (GNUNET_HashCode) + ntohs (pkt->ip_hdr.tot_lngth) -
- 4 * pkt->ip_hdr.hdr_lngth);
-
- GNUNET_MESH_ApplicationType app_type = 0; /* make compiler happy */
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "me->addrlen is %d\n",
- me->addrlen);
- if (me->addrlen == 0)
- {
- /* This is a mapping to a gnunet-service */
- memcpy (hc, &me->desc.service_descriptor, sizeof (GNUNET_HashCode));
-
- if ((IPPROTO_UDP == pkt->ip_hdr.proto) &&
- (me->desc.service_type & htonl (GNUNET_DNS_SERVICE_TYPE_UDP)) &&
- (port_in_ports (me->desc.ports, pkt_udp->udp_hdr.dpt) ||
- testBit (me->additional_ports, ntohs (pkt_udp->udp_hdr.dpt))))
- {
- hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_SERVICE_UDP);
-
- memcpy (hc + 1, &pkt_udp->udp_hdr, ntohs (pkt_udp->udp_hdr.len));
-
- }
- else if ((IPPROTO_TCP == pkt->ip_hdr.proto) &&
- (me->
- desc.service_type & htonl (GNUNET_DNS_SERVICE_TYPE_TCP))
- && (port_in_ports (me->desc.ports, pkt_tcp->tcp_hdr.dpt)))
- {
- hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_SERVICE_TCP);
-
- memcpy (hc + 1, &pkt_tcp->tcp_hdr,
- ntohs (pkt->ip_hdr.tot_lngth) -
- 4 * pkt->ip_hdr.hdr_lngth);
-
- }
- if (me->tunnel == NULL && NULL != cls)
- {
- *cls =
- GNUNET_MESH_tunnel_create (mesh_handle,
- initialize_tunnel_state (4, NULL),
- send_pkt_to_peer, NULL, cls);
- GNUNET_MESH_peer_request_connect_add (*cls,
- (struct GNUNET_PeerIdentity
- *) &me->desc.peer);
- me->tunnel = *cls;
- }
- else if (NULL != cls)
- {
- *cls = me->tunnel;
- send_pkt_to_peer (cls, (struct GNUNET_PeerIdentity *) 1, NULL);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Queued to send IPv4 to peer %x, type %d\n",
- *((unsigned int *) &me->desc.peer),
- ntohs (hdr->type));
- }
- }
- else
- {
- /* This is a mapping to a "real" address */
- struct remote_addr *s = (struct remote_addr *) hc;
-
- s->addrlen = me->addrlen;
- memcpy (s->addr, me->addr, me->addrlen);
- s->proto = pkt->ip_hdr.proto;
- if (s->proto == IPPROTO_UDP)
- {
- hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_REMOTE_UDP);
- memcpy (hc + 1, &pkt_udp->udp_hdr, ntohs (pkt_udp->udp_hdr.len));
- app_type = GNUNET_APPLICATION_TYPE_INTERNET_UDP_GATEWAY;
- }
- else if (s->proto == IPPROTO_TCP)
- {
- hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_REMOTE_TCP);
- memcpy (hc + 1, &pkt_tcp->tcp_hdr,
- ntohs (pkt->ip_hdr.tot_lngth) -
- 4 * pkt->ip_hdr.hdr_lngth);
- app_type = GNUNET_APPLICATION_TYPE_INTERNET_TCP_GATEWAY;
- }
- else
- GNUNET_assert (0);
- if (me->tunnel == NULL && NULL != cls)
- {
- *cls =
- GNUNET_MESH_tunnel_create (mesh_handle,
- initialize_tunnel_state (4, NULL),
- send_pkt_to_peer, NULL, cls);
-
- GNUNET_MESH_peer_request_connect_by_type (*cls, app_type);
- me->tunnel = *cls;
- }
- else if (NULL != cls)
- {
- *cls = me->tunnel;
- send_pkt_to_peer (cls, (struct GNUNET_PeerIdentity *) 1, NULL);
- }
- }
- }
- else
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Packet to %x which has no mapping\n", dadr);
- }
- break;
- case 0x01:
- /* ICMP */
- pkt_icmp = (struct ip_icmp *) pkt;
- if (pkt_icmp->icmp_hdr.type == 0x8 &&
- (key = address4_mapping_exists (dadr)) != NULL)
- {
- GNUNET_free (key);
- pkt_icmp = GNUNET_malloc (ntohs (pkt->shdr.size));
- memcpy (pkt_icmp, pkt, ntohs (pkt->shdr.size));
- GNUNET_SCHEDULER_add_now (&send_icmp4_response, pkt_icmp);
- }
- break;
- }
- }
- }
-}
-
-void
-write_to_helper (void *buf, size_t len)
-{
- (void) GNUNET_DISK_file_write (helper_handle->fh_to_helper, buf, len);
-}
-
-void
-schedule_helper_write (struct GNUNET_TIME_Relative time, void *cls)
-{
- if (GNUNET_SCHEDULER_NO_TASK != shs_task)
- return;
- GNUNET_SCHEDULER_add_write_file (time, helper_handle->fh_to_helper,
- &helper_write, cls);
-}
+++ /dev/null
-/*
- This file is part of GNUnet.
- (C) 2010 Christian Grothoff
-
- 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 vpn/gnunet-daemon-vpn-helper.h
- * @brief
- * @author Philipp Toelke
- */
-#ifndef GNUNET_DAEMON_VPN_HELPER_H
-#define GNUNET_DAEMON_VPN_HELPER_H
-
-#include "gnunet-helper-vpn-api.h"
-
-/**
- * Handle to the helper. contains filedescriptors and such
- */
-extern struct GNUNET_VPN_HELPER_Handle *helper_handle;
-
-extern GNUNET_SCHEDULER_TaskIdentifier shs_task;
-
-/**
- * Start the helper-process
- */
-void
-start_helper_and_schedule (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc);
-
-/**
- * Restart the helper-process
- */
-void
-restart_helper (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tskctx);
-
-/**
- * Read from the helper-process
- */
-void
-helper_read (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tsdkctx);
-
-/**
- * Send an dns-answer-packet to the helper
- */
-void
-helper_write (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tsdkctx);
-
-/**
- * Receive packets from the helper-process
- */
-void
-message_token (void *cls, void *client,
- const struct GNUNET_MessageHeader *message);
-
-void
-write_to_helper (void *buf, size_t len);
-
-void
-schedule_helper_write (struct GNUNET_TIME_Relative, void *cls);
-
-#endif /* end of include guard: GNUNET-DAEMON-VPN-HELPER_H */
#include "gnunet_container_lib.h"
#include "gnunet_constants.h"
#include <block_dns.h>
-#include "gnunet-daemon-vpn-helper.h"
#include "gnunet_dns_service.h"
#include "gnunet-daemon-vpn.h"
#include "gnunet-vpn-checksum.h"
struct GNUNET_CONTAINER_MultiHashMap *hashmap;
static struct GNUNET_CONTAINER_Heap *heap;
+/**
+ * The handle to the helper
+ */
+static struct GNUNET_HELPER_Handle *helper_handle;
+
+/**
+ * Arguments to the exit helper.
+ */
+static char *vpn_argv[7];
+
struct GNUNET_DNS_Handle *dns_handle;
struct answer_packet_list *answer_proc_head;
GNUNET_SCHEDULER_TaskIdentifier shs_task;
+/**
+ * The tunnels that will be used to send tcp- and udp-packets
+ */
+static struct GNUNET_MESH_Tunnel *tcp_tunnel;
+static struct GNUNET_MESH_Tunnel *udp_tunnel;
+
+
+
/**
* Sets a bit active in a bitArray.
*
cleanup (void *cls GNUNET_UNUSED,
const struct GNUNET_SCHEDULER_TaskContext *tskctx)
{
- GNUNET_assert (0 != (tskctx->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN));
-
- /* stop the helper */
- cleanup_helper (helper_handle);
+ unsigned int i;
+ GNUNET_assert (0 != (tskctx->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN));
/* close the connection to the service-dns */
GNUNET_DNS_disconnect (dns_handle);
if (mesh_handle != NULL)
GNUNET_MESH_disconnect (mesh_handle);
mesh_handle = NULL;
}
+ if (helper_handle != NULL)
+ {
+ GNUNET_HELPER_stop (helper_handle);
+ helper_handle = NULL;
+ }
if (GNUNET_SCHEDULER_NO_TASK != shs_task)
{
GNUNET_SCHEDULER_cancel (shs_task);
GNUNET_SCHEDULER_cancel (conn_task);
conn_task = GNUNET_SCHEDULER_NO_TASK;
}
+ for (i=0;i<5;i++)
+ GNUNET_free_non_null (vpn_argv[i]);
}
/*}}}*/
}
}
+
+static void *
+initialize_tunnel_state (int addrlen, struct GNUNET_MESH_TransmitHandle *th)
+{
+ struct tunnel_state *ts = GNUNET_malloc (sizeof *ts);
+
+ ts->addrlen = addrlen;
+ ts->th = th;
+ return ts;
+}
+
+/**
+ * Send an dns-answer-packet to the helper
+ */
+void
+helper_write (void *cls GNUNET_UNUSED,
+ int status)
+{
+ struct answer_packet_list *ans = answer_proc_head;
+
+ if (NULL == ans)
+ return;
+ if (GNUNET_SYSERR == status)
+ return;
+
+ size_t len = ntohs (ans->pkt.hdr.size);
+
+ GNUNET_assert (ans->pkt.subtype == GNUNET_DNS_ANSWER_TYPE_IP);
+
+ GNUNET_assert (20 == sizeof (struct ip_hdr));
+ GNUNET_assert (8 == sizeof (struct udp_pkt));
+
+ size_t data_len = len - sizeof (struct answer_packet) + 1;
+
+ size_t pkt_len;
+
+ if (ans->pkt.addrlen == 16)
+ {
+ size_t net_len =
+ sizeof (struct ip6_hdr) + sizeof (struct udp_dns) + data_len;
+ pkt_len =
+ sizeof (struct GNUNET_MessageHeader) + sizeof (struct pkt_tun) +
+ net_len;
+
+ struct ip6_udp_dns *pkt = alloca (pkt_len);
+
+ GNUNET_assert (pkt != NULL);
+ memset (pkt, 0, pkt_len);
+
+ /* set the gnunet-header */
+ pkt->shdr.size = htons (pkt_len);
+ pkt->shdr.type = htons (GNUNET_MESSAGE_TYPE_VPN_HELPER);
+
+ /* set the tun-header (no flags and ethertype of IPv4) */
+ pkt->tun.flags = 0;
+ pkt->tun.type = htons (0x86dd);
+
+ memcpy (&pkt->ip6_hdr.sadr, ans->pkt.from, 16);
+ memcpy (&pkt->ip6_hdr.dadr, ans->pkt.to, 16);
+
+ /* set the udp-header */
+ pkt->udp_dns.udp_hdr.spt = htons (53);
+ pkt->udp_dns.udp_hdr.dpt = ans->pkt.dst_port;
+ pkt->udp_dns.udp_hdr.len = htons (net_len - sizeof (struct ip6_hdr));
+ pkt->udp_dns.udp_hdr.crc = 0;
+ uint32_t sum = 0;
+
+ sum = calculate_checksum_update (sum, (uint16_t *) & pkt->ip6_hdr.sadr, 16);
+ sum = calculate_checksum_update (sum, (uint16_t *) & pkt->ip6_hdr.dadr, 16);
+ uint32_t tmp = (pkt->udp_dns.udp_hdr.len & 0xffff);
+
+ sum = calculate_checksum_update (sum, (uint16_t *) & tmp, 4);
+ tmp = htons (((pkt->ip6_hdr.nxthdr & 0x00ff)));
+ sum = calculate_checksum_update (sum, (uint16_t *) & tmp, 4);
+
+ sum =
+ calculate_checksum_update (sum, (uint16_t *) & pkt->udp_dns.udp_hdr,
+ ntohs (net_len - sizeof (struct ip6_hdr)));
+ pkt->udp_dns.udp_hdr.crc = calculate_checksum_end (sum);
+
+ pkt->ip6_hdr.version = 6;
+ pkt->ip6_hdr.paylgth = net_len - sizeof (struct ip6_hdr);
+ pkt->ip6_hdr.nxthdr = IPPROTO_UDP;
+ pkt->ip6_hdr.hoplmt = 0xff;
+
+ memcpy (&pkt->udp_dns.data, ans->pkt.data, data_len);
+ (void) GNUNET_HELPER_send (helper_handle,
+ &pkt->shdr,
+ GNUNET_YES,
+ &helper_write, NULL);
+ }
+ else if (ans->pkt.addrlen == 4)
+ {
+ size_t net_len =
+ sizeof (struct ip_hdr) + sizeof (struct udp_dns) + data_len;
+ pkt_len =
+ sizeof (struct GNUNET_MessageHeader) + sizeof (struct pkt_tun) +
+ net_len;
+
+ struct ip_udp_dns *pkt = alloca (pkt_len);
+
+ GNUNET_assert (pkt != NULL);
+ memset (pkt, 0, pkt_len);
+
+ /* set the gnunet-header */
+ pkt->shdr.size = htons (pkt_len);
+ pkt->shdr.type = htons (GNUNET_MESSAGE_TYPE_VPN_HELPER);
+
+ /* set the tun-header (no flags and ethertype of IPv4) */
+ pkt->tun.flags = 0;
+ pkt->tun.type = htons (0x0800);
+
+ /* set the ip-header */
+ pkt->ip_hdr.version = 4;
+ pkt->ip_hdr.hdr_lngth = 5;
+ pkt->ip_hdr.diff_serv = 0;
+ pkt->ip_hdr.tot_lngth = htons (net_len);
+ pkt->ip_hdr.ident = 0;
+ pkt->ip_hdr.flags = 0;
+ pkt->ip_hdr.frag_off = 0;
+ pkt->ip_hdr.ttl = 255;
+ pkt->ip_hdr.proto = IPPROTO_UDP;
+ pkt->ip_hdr.chks = 0; /* Will be calculated later */
+
+ memcpy (&pkt->ip_hdr.sadr, ans->pkt.from, 4);
+ memcpy (&pkt->ip_hdr.dadr, ans->pkt.to, 4);
+
+ pkt->ip_hdr.chks =
+ calculate_ip_checksum ((uint16_t *) & pkt->ip_hdr, 5 * 4);
+
+ /* set the udp-header */
+ pkt->udp_dns.udp_hdr.spt = htons (53);
+ pkt->udp_dns.udp_hdr.dpt = ans->pkt.dst_port;
+ pkt->udp_dns.udp_hdr.len = htons (net_len - sizeof (struct ip_hdr));
+ pkt->udp_dns.udp_hdr.crc = 0; /* Optional for IPv4 */
+
+ memcpy (&pkt->udp_dns.data, ans->pkt.data, data_len);
+ (void) GNUNET_HELPER_send (helper_handle,
+ &pkt->shdr,
+ GNUNET_YES,
+ &helper_write, NULL);
+
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Wrong addrlen = %d\n",
+ ans->pkt.addrlen);
+ GNUNET_assert (0);
+ return; /* convince compiler that we're done here */
+ }
+
+ GNUNET_CONTAINER_DLL_remove (answer_proc_head, answer_proc_tail, ans);
+ GNUNET_free (ans);
+
+}
+
+/**
+ * Receive packets from the helper-process
+ */
+void
+message_token (void *cls GNUNET_UNUSED, void *client GNUNET_UNUSED,
+ const struct GNUNET_MessageHeader *message)
+{
+ GNUNET_assert (ntohs (message->type) == GNUNET_MESSAGE_TYPE_VPN_HELPER);
+
+ struct tun_pkt *pkt_tun = (struct tun_pkt *) message;
+ GNUNET_HashCode *key;
+
+ /* ethertype is ipv6 */
+ if (ntohs (pkt_tun->tun.type) == 0x86dd)
+ {
+ struct ip6_pkt *pkt6 = (struct ip6_pkt *) message;
+
+ GNUNET_assert (pkt6->ip6_hdr.version == 6);
+ struct ip6_tcp *pkt6_tcp;
+ struct ip6_udp *pkt6_udp;
+ struct ip6_icmp *pkt6_icmp;
+
+ pkt6_udp = NULL; /* make compiler happy */
+ switch (pkt6->ip6_hdr.nxthdr)
+ {
+ case IPPROTO_UDP:
+ pkt6_udp = (struct ip6_udp *) pkt6;
+ /* Send dns-packets to the service-dns */
+ if (ntohs (pkt6_udp->udp_hdr.dpt) == 53)
+ {
+ /* 9 = 8 for the udp-header + 1 for the unsigned char data[1]; */
+ GNUNET_DNS_queue_request_v6 (dns_handle,
+ &pkt6->ip6_hdr.dadr,
+ &pkt6->ip6_hdr.sadr,
+ ntohs (pkt6_udp->udp_hdr.spt),
+ ntohs (pkt6_udp->udp_hdr.len) - 8,
+ (const void*) pkt6_udp->data);
+
+ break;
+ }
+ /* fall through */
+ case IPPROTO_TCP:
+ pkt6_tcp = (struct ip6_tcp *) pkt6;
+
+ if ((key = address6_mapping_exists (&pkt6->ip6_hdr.dadr)) != NULL)
+ {
+ struct map_entry *me = GNUNET_CONTAINER_multihashmap_get (hashmap, key);
+
+ GNUNET_assert (me != NULL);
+ GNUNET_free (key);
+
+ size_t size =
+ sizeof (struct GNUNET_MESH_Tunnel *) +
+ sizeof (struct GNUNET_MessageHeader) + sizeof (GNUNET_HashCode) +
+ ntohs (pkt6->ip6_hdr.paylgth);
+
+ struct GNUNET_MESH_Tunnel **cls = GNUNET_malloc (size);
+ struct GNUNET_MessageHeader *hdr =
+ (struct GNUNET_MessageHeader *) (cls + 1);
+ GNUNET_HashCode *hc = (GNUNET_HashCode *) (hdr + 1);
+
+ hdr->size =
+ htons (sizeof (struct GNUNET_MessageHeader) +
+ sizeof (GNUNET_HashCode) + ntohs (pkt6->ip6_hdr.paylgth));
+
+ GNUNET_MESH_ApplicationType app_type = 0; /* fix compiler uninitialized warning... */
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "me->addrlen is %d\n",
+ me->addrlen);
+ if (me->addrlen == 0)
+ {
+ /* This is a mapping to a gnunet-service */
+ memcpy (hc, &me->desc.service_descriptor, sizeof (GNUNET_HashCode));
+
+ if (IPPROTO_UDP == pkt6->ip6_hdr.nxthdr &&
+ (me->desc.service_type & htonl (GNUNET_DNS_SERVICE_TYPE_UDP)) &&
+ (port_in_ports (me->desc.ports, pkt6_udp->udp_hdr.dpt) ||
+ testBit (me->additional_ports, ntohs (pkt6_udp->udp_hdr.dpt))))
+ {
+ hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_SERVICE_UDP);
+
+ memcpy (hc + 1, &pkt6_udp->udp_hdr, ntohs (pkt6_udp->udp_hdr.len));
+
+ }
+ else if (IPPROTO_TCP == pkt6->ip6_hdr.nxthdr &&
+ (me->desc.service_type & htonl (GNUNET_DNS_SERVICE_TYPE_TCP))
+ && (port_in_ports (me->desc.ports, pkt6_tcp->tcp_hdr.dpt)))
+ {
+ hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_SERVICE_TCP);
+
+ memcpy (hc + 1, &pkt6_tcp->tcp_hdr, ntohs (pkt6->ip6_hdr.paylgth));
+
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "pip: %d\n",
+ port_in_ports (me->desc.ports, pkt6_tcp->tcp_hdr.dpt));
+ GNUNET_assert (0);
+ }
+ if (me->tunnel == NULL && NULL != cls)
+ {
+ *cls =
+ GNUNET_MESH_tunnel_create (mesh_handle,
+ initialize_tunnel_state (16, NULL),
+ &send_pkt_to_peer, NULL, cls);
+
+ GNUNET_MESH_peer_request_connect_add (*cls,
+ (struct GNUNET_PeerIdentity *)
+ &me->desc.peer);
+ me->tunnel = *cls;
+ }
+ else if (NULL != cls)
+ {
+ *cls = me->tunnel;
+ send_pkt_to_peer (cls, (struct GNUNET_PeerIdentity *) 1, NULL);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Queued to send IPv6 to peer %x, type %d\n",
+ *((unsigned int *) &me->desc.peer), ntohs (hdr->type));
+ }
+ }
+ else
+ {
+ /* This is a mapping to a "real" address */
+ struct remote_addr *s = (struct remote_addr *) hc;
+
+ s->addrlen = me->addrlen;
+ memcpy (s->addr, me->addr, me->addrlen);
+ s->proto = pkt6->ip6_hdr.nxthdr;
+ if (s->proto == IPPROTO_UDP)
+ {
+ hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_REMOTE_UDP);
+ memcpy (hc + 1, &pkt6_udp->udp_hdr, ntohs (pkt6_udp->udp_hdr.len));
+ app_type = GNUNET_APPLICATION_TYPE_INTERNET_UDP_GATEWAY;
+ if (NULL != udp_tunnel)
+ me->tunnel = udp_tunnel;
+ }
+ else if (s->proto == IPPROTO_TCP)
+ {
+ hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_REMOTE_TCP);
+ memcpy (hc + 1, &pkt6_tcp->tcp_hdr, ntohs (pkt6->ip6_hdr.paylgth));
+ app_type = GNUNET_APPLICATION_TYPE_INTERNET_TCP_GATEWAY;
+ if (NULL != tcp_tunnel)
+ me->tunnel = tcp_tunnel;
+ }
+ else
+ {
+ GNUNET_assert (0);
+ }
+ if (me->tunnel == NULL && NULL != cls)
+ {
+ *cls =
+ GNUNET_MESH_tunnel_create (mesh_handle,
+ initialize_tunnel_state (16, NULL),
+ &send_pkt_to_peer, NULL, cls);
+
+ GNUNET_MESH_peer_request_connect_by_type (*cls, app_type);
+ me->tunnel = *cls;
+ if (GNUNET_APPLICATION_TYPE_INTERNET_UDP_GATEWAY == app_type)
+ udp_tunnel = *cls;
+ else if (GNUNET_APPLICATION_TYPE_INTERNET_TCP_GATEWAY == app_type)
+ tcp_tunnel = *cls;
+ }
+ else if (NULL != cls)
+ {
+ *cls = me->tunnel;
+ send_pkt_to_peer (cls, (struct GNUNET_PeerIdentity *) 1, NULL);
+ }
+ }
+ }
+ else
+ {
+ char pbuf[INET6_ADDRSTRLEN];
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Packet to %s, which has no mapping\n",
+ inet_ntop (AF_INET6,
+ &pkt6->ip6_hdr.dadr,
+ pbuf,
+ sizeof (pbuf)));
+ }
+ break;
+ case 0x3a:
+ /* ICMPv6 */
+ pkt6_icmp = (struct ip6_icmp *) pkt6;
+ /* If this packet is an icmp-echo-request and a mapping exists, answer */
+ if (pkt6_icmp->icmp_hdr.type == 0x80 &&
+ (key = address6_mapping_exists (&pkt6->ip6_hdr.dadr)) != NULL)
+ {
+ GNUNET_free (key);
+ pkt6_icmp = GNUNET_malloc (ntohs (pkt6->shdr.size));
+ memcpy (pkt6_icmp, pkt6, ntohs (pkt6->shdr.size));
+ GNUNET_SCHEDULER_add_now (&send_icmp6_response, pkt6_icmp);
+ }
+ break;
+ }
+ }
+ /* ethertype is ipv4 */
+ else if (ntohs (pkt_tun->tun.type) == 0x0800)
+ {
+ struct ip_pkt *pkt = (struct ip_pkt *) message;
+ struct ip_udp *udp = (struct ip_udp *) message;
+ struct ip_tcp *pkt_tcp;
+ struct ip_udp *pkt_udp;
+ struct ip_icmp *pkt_icmp;
+
+ GNUNET_assert (pkt->ip_hdr.version == 4);
+
+ /* Send dns-packets to the service-dns */
+ if (pkt->ip_hdr.proto == IPPROTO_UDP && ntohs (udp->udp_hdr.dpt) == 53)
+ {
+ GNUNET_DNS_queue_request_v4 (dns_handle,
+ &pkt->ip_hdr.dadr,
+ &pkt->ip_hdr.sadr,
+ ntohs (udp->udp_hdr.spt),
+ ntohs (udp->udp_hdr.len) - 8,
+ (const void*) udp->data);
+ }
+ else
+ {
+ uint32_t dadr = pkt->ip_hdr.dadr.s_addr;
+ unsigned char *c = (unsigned char *) &dadr;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Packet to %d.%d.%d.%d, proto %x\n",
+ c[0], c[1], c[2], c[3], pkt->ip_hdr.proto);
+ switch (pkt->ip_hdr.proto)
+ {
+ case IPPROTO_TCP:
+ case IPPROTO_UDP:
+ pkt_tcp = (struct ip_tcp *) pkt;
+ pkt_udp = (struct ip_udp *) pkt;
+
+ if ((key = address4_mapping_exists (dadr)) != NULL)
+ {
+ struct map_entry *me =
+ GNUNET_CONTAINER_multihashmap_get (hashmap, key);
+ GNUNET_assert (me != NULL);
+ GNUNET_free (key);
+
+ size_t size =
+ sizeof (struct GNUNET_MESH_Tunnel *) +
+ sizeof (struct GNUNET_MessageHeader) + sizeof (GNUNET_HashCode) +
+ ntohs (pkt->ip_hdr.tot_lngth) - 4 * pkt->ip_hdr.hdr_lngth;
+
+ struct GNUNET_MESH_Tunnel **cls = GNUNET_malloc (size);
+ struct GNUNET_MessageHeader *hdr =
+ (struct GNUNET_MessageHeader *) (cls + 1);
+ GNUNET_HashCode *hc = (GNUNET_HashCode *) (hdr + 1);
+
+ hdr->size =
+ htons (sizeof (struct GNUNET_MessageHeader) +
+ sizeof (GNUNET_HashCode) + ntohs (pkt->ip_hdr.tot_lngth) -
+ 4 * pkt->ip_hdr.hdr_lngth);
+
+ GNUNET_MESH_ApplicationType app_type = 0; /* make compiler happy */
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "me->addrlen is %d\n",
+ me->addrlen);
+ if (me->addrlen == 0)
+ {
+ /* This is a mapping to a gnunet-service */
+ memcpy (hc, &me->desc.service_descriptor, sizeof (GNUNET_HashCode));
+
+ if ((IPPROTO_UDP == pkt->ip_hdr.proto) &&
+ (me->desc.service_type & htonl (GNUNET_DNS_SERVICE_TYPE_UDP)) &&
+ (port_in_ports (me->desc.ports, pkt_udp->udp_hdr.dpt) ||
+ testBit (me->additional_ports, ntohs (pkt_udp->udp_hdr.dpt))))
+ {
+ hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_SERVICE_UDP);
+
+ memcpy (hc + 1, &pkt_udp->udp_hdr, ntohs (pkt_udp->udp_hdr.len));
+
+ }
+ else if ((IPPROTO_TCP == pkt->ip_hdr.proto) &&
+ (me->
+ desc.service_type & htonl (GNUNET_DNS_SERVICE_TYPE_TCP))
+ && (port_in_ports (me->desc.ports, pkt_tcp->tcp_hdr.dpt)))
+ {
+ hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_SERVICE_TCP);
+
+ memcpy (hc + 1, &pkt_tcp->tcp_hdr,
+ ntohs (pkt->ip_hdr.tot_lngth) -
+ 4 * pkt->ip_hdr.hdr_lngth);
+
+ }
+ if (me->tunnel == NULL && NULL != cls)
+ {
+ *cls =
+ GNUNET_MESH_tunnel_create (mesh_handle,
+ initialize_tunnel_state (4, NULL),
+ send_pkt_to_peer, NULL, cls);
+ GNUNET_MESH_peer_request_connect_add (*cls,
+ (struct GNUNET_PeerIdentity
+ *) &me->desc.peer);
+ me->tunnel = *cls;
+ }
+ else if (NULL != cls)
+ {
+ *cls = me->tunnel;
+ send_pkt_to_peer (cls, (struct GNUNET_PeerIdentity *) 1, NULL);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Queued to send IPv4 to peer %x, type %d\n",
+ *((unsigned int *) &me->desc.peer),
+ ntohs (hdr->type));
+ }
+ }
+ else
+ {
+ /* This is a mapping to a "real" address */
+ struct remote_addr *s = (struct remote_addr *) hc;
+
+ s->addrlen = me->addrlen;
+ memcpy (s->addr, me->addr, me->addrlen);
+ s->proto = pkt->ip_hdr.proto;
+ if (s->proto == IPPROTO_UDP)
+ {
+ hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_REMOTE_UDP);
+ memcpy (hc + 1, &pkt_udp->udp_hdr, ntohs (pkt_udp->udp_hdr.len));
+ app_type = GNUNET_APPLICATION_TYPE_INTERNET_UDP_GATEWAY;
+ }
+ else if (s->proto == IPPROTO_TCP)
+ {
+ hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_REMOTE_TCP);
+ memcpy (hc + 1, &pkt_tcp->tcp_hdr,
+ ntohs (pkt->ip_hdr.tot_lngth) -
+ 4 * pkt->ip_hdr.hdr_lngth);
+ app_type = GNUNET_APPLICATION_TYPE_INTERNET_TCP_GATEWAY;
+ }
+ else
+ GNUNET_assert (0);
+ if (me->tunnel == NULL && NULL != cls)
+ {
+ *cls =
+ GNUNET_MESH_tunnel_create (mesh_handle,
+ initialize_tunnel_state (4, NULL),
+ send_pkt_to_peer, NULL, cls);
+
+ GNUNET_MESH_peer_request_connect_by_type (*cls, app_type);
+ me->tunnel = *cls;
+ }
+ else if (NULL != cls)
+ {
+ *cls = me->tunnel;
+ send_pkt_to_peer (cls, (struct GNUNET_PeerIdentity *) 1, NULL);
+ }
+ }
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Packet to %x which has no mapping\n", dadr);
+ }
+ break;
+ case 0x01:
+ /* ICMP */
+ pkt_icmp = (struct ip_icmp *) pkt;
+ if (pkt_icmp->icmp_hdr.type == 0x8 &&
+ (key = address4_mapping_exists (dadr)) != NULL)
+ {
+ GNUNET_free (key);
+ pkt_icmp = GNUNET_malloc (ntohs (pkt->shdr.size));
+ memcpy (pkt_icmp, pkt, ntohs (pkt->shdr.size));
+ GNUNET_SCHEDULER_add_now (&send_icmp4_response, pkt_icmp);
+ }
+ break;
+ }
+ }
+ }
+}
+
+
+
static void
collect_mappings (void *cls GNUNET_UNUSED,
const struct GNUNET_SCHEDULER_TaskContext *tc)
memcpy (response + 1, request + 1,
ntohs (request->shdr.size) - sizeof (struct ip_icmp));
- write_to_helper (response, ntohs (response->shdr.size));
-
+ (void) GNUNET_HELPER_send (helper_handle,
+ &response->shdr,
+ GNUNET_YES,
+ NULL, NULL);
GNUNET_free (request);
}
memcpy (response + 1, request + 1,
ntohs (request->shdr.size) - sizeof (struct ip6_icmp));
- write_to_helper (response, ntohs (response->shdr.size));
-
+ (void) GNUNET_HELPER_send (helper_handle,
+ &response->shdr,
+ GNUNET_YES,
+ NULL, NULL);
GNUNET_free (request);
}
GNUNET_CONTAINER_DLL_insert_after (answer_proc_head, answer_proc_tail,
answer_proc_tail, list);
- schedule_helper_write (GNUNET_TIME_UNIT_FOREVER_REL, NULL);
-
- return;
}
calculate_checksum_update (sum, (uint16_t *) & pkt6->udp_hdr,
ntohs (pkt->len));
pkt6->udp_hdr.crc = calculate_checksum_end (sum);
-
- write_to_helper (pkt6, size);
+
+ (void) GNUNET_HELPER_send (helper_handle,
+ &pkt6->shdr,
+ GNUNET_YES,
+ NULL, NULL);
}
else
{
pkt4->ip_hdr.chks =
calculate_ip_checksum ((uint16_t *) & pkt4->ip_hdr, 5 * 4);
- write_to_helper (pkt4, size);
+ (void) GNUNET_HELPER_send (helper_handle,
+ &pkt4->shdr,
+ GNUNET_YES,
+ NULL, NULL);
}
return GNUNET_OK;
ntohs (pkt6->ip6_hdr.paylgth));
pkt6->tcp_hdr.crc = calculate_checksum_end (sum);
- write_to_helper (pkt6, size);
+ (void) GNUNET_HELPER_send (helper_handle,
+ &pkt6->shdr,
+ GNUNET_YES,
+ NULL, NULL);
}
else
{
pkt4->ip_hdr.chks =
calculate_ip_checksum ((uint16_t *) & pkt4->ip_hdr, 5 * 4);
- write_to_helper (pkt4, size);
+ (void) GNUNET_HELPER_send (helper_handle,
+ &pkt4->shdr,
+ GNUNET_YES,
+ NULL, NULL);
+
}
return GNUNET_OK;
{receive_tcp_back, GNUNET_MESSAGE_TYPE_VPN_REMOTE_TCP_BACK, 0},
{NULL, 0, 0}
};
-
static const GNUNET_MESH_ApplicationType types[] = {
GNUNET_APPLICATION_TYPE_END
};
+ char *ifname;
+ char *ipv6addr;
+ char *ipv6prefix;
+ char *ipv4addr;
+ char *ipv4mask;
mesh_handle =
GNUNET_MESH_connect (cfg_, 42, NULL, new_tunnel, cleaner, handlers,
dns_handle = GNUNET_DNS_connect (cfg,
&process_answer,
NULL);
- shs_task =
- GNUNET_SCHEDULER_add_after (conn_task, start_helper_and_schedule, NULL);
+ if (GNUNET_SYSERR ==
+ GNUNET_CONFIGURATION_get_value_string (cfg, "vpn", "IFNAME", &ifname))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "No entry 'IFNAME' in configuration!\n");
+ exit (1);
+ }
+
+ if (GNUNET_SYSERR ==
+ GNUNET_CONFIGURATION_get_value_string (cfg, "vpn", "IPV6ADDR", &ipv6addr))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "No entry 'IPV6ADDR' in configuration!\n");
+ exit (1);
+ }
+
+ if (GNUNET_SYSERR ==
+ GNUNET_CONFIGURATION_get_value_string (cfg, "vpn", "IPV6PREFIX",
+ &ipv6prefix))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "No entry 'IPV6PREFIX' in configuration!\n");
+ exit (1);
+ }
+
+ if (GNUNET_SYSERR ==
+ GNUNET_CONFIGURATION_get_value_string (cfg, "vpn", "IPV4ADDR", &ipv4addr))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "No entry 'IPV4ADDR' in configuration!\n");
+ exit (1);
+ }
+
+ if (GNUNET_SYSERR ==
+ GNUNET_CONFIGURATION_get_value_string (cfg, "vpn", "IPV4MASK", &ipv4mask))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "No entry 'IPV4MASK' in configuration!\n");
+ exit (1);
+ }
+
+ vpn_argv[0] = GNUNET_strdup ("vpn-gnunet");
+ vpn_argv[1] = ifname;
+ vpn_argv[2] = ipv6addr;
+ vpn_argv[3] = ipv6prefix;
+ vpn_argv[4] = ipv4addr;
+ vpn_argv[5] = ipv4mask;
+ vpn_argv[6] = NULL;
+
+ helper_handle = GNUNET_HELPER_start ("gnunet-helper-vpn", vpn_argv,
+ &message_token, NULL);
+ GNUNET_DNS_restart_hijack (dns_handle);
GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &cleanup, cls);
}
#include "gnunet-helper-vpn-api.h"
-static void
-stop_helper (struct GNUNET_VPN_HELPER_Handle *handle)
-{
- if (NULL == handle->helper_proc)
- return;
- GNUNET_OS_process_kill (handle->helper_proc, SIGKILL);
- GNUNET_OS_process_wait (handle->helper_proc);
- GNUNET_OS_process_close (handle->helper_proc);
- handle->helper_proc = NULL;
-
- GNUNET_DISK_pipe_close (handle->helper_in);
- GNUNET_DISK_pipe_close (handle->helper_out);
-
- GNUNET_SERVER_mst_destroy (handle->mst);
-}
-
-extern GNUNET_SCHEDULER_TaskIdentifier shs_task;
-
-/**
- * Read from the helper-process
- */
-static void
-helper_read (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tsdkctx)
-{
- struct GNUNET_VPN_HELPER_Handle *handle = cls;
-
- /* no message can be bigger then 64k */
- char buf[65535];
-
- if (tsdkctx->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN)
- return;
-
- int t = GNUNET_DISK_file_read (handle->fh_from_helper, &buf, 65535);
-
- /* On read-error, restart the helper */
- if (t <= 0)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- "Read error for header from vpn-helper: %m\n");
- stop_helper (handle);
-
- /* Restart the helper */
- shs_task =
- GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_SECONDS,
- handle->restart_task, handle);
- return;
- }
-
- if (GNUNET_SYSERR ==
- GNUNET_SERVER_mst_receive (handle->mst, handle->client, buf, t, 0, 0))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "SYSERR from mst\n");
- stop_helper (handle);
-
- /* Restart the helper */
- shs_task =
- GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_SECONDS,
- handle->restart_task, handle);
- return;
-
- }
-
- GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
- handle->fh_from_helper, &helper_read, handle);
-}
void
cleanup_helper (struct GNUNET_VPN_HELPER_Handle *handle)
const char *process_name, GNUNET_SCHEDULER_Task restart_task,
GNUNET_SERVER_MessageTokenizerCallback cb, void *cb_cls)
{
- struct GNUNET_VPN_HELPER_Handle *handle =
- GNUNET_malloc (sizeof (struct GNUNET_VPN_HELPER_Handle));
-
- handle->helper_in = GNUNET_DISK_pipe (GNUNET_YES, GNUNET_YES, GNUNET_NO);
- handle->helper_out = GNUNET_DISK_pipe (GNUNET_YES, GNUNET_NO, GNUNET_YES);
-
- handle->restart_task = restart_task;
- if (handle->helper_in == NULL || handle->helper_out == NULL)
- {
- GNUNET_free (handle);
- return NULL;
- }
-
- handle->helper_proc =
- GNUNET_OS_start_process (handle->helper_in, handle->helper_out,
- "gnunet-helper-vpn", process_name, ifname,
- ipv6addr, ipv6prefix, ipv4addr, ipv4mask, NULL);
-
- handle->fh_from_helper =
- GNUNET_DISK_pipe_handle (handle->helper_out, GNUNET_DISK_PIPE_END_READ);
- handle->fh_to_helper =
- GNUNET_DISK_pipe_handle (handle->helper_in, GNUNET_DISK_PIPE_END_WRITE);
-
- GNUNET_DISK_pipe_close_end (handle->helper_out, GNUNET_DISK_PIPE_END_WRITE);
- GNUNET_DISK_pipe_close_end (handle->helper_in, GNUNET_DISK_PIPE_END_READ);
-
- handle->mst = GNUNET_SERVER_mst_create (cb, cb_cls);
-
- GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
- handle->fh_from_helper, &helper_read, handle);
-
- return handle;
-}
+++ /dev/null
-/*
- This file is part of GNUnet.
- (C) 2010 Christian Grothoff
-
- 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 vpn/gnunet-helper-vpn-api.h
- * @brief exposes the API (the convenience-functions) of dealing with the
- * helper-vpn
- * @author Philipp Toelke
- */
-#ifndef GNUNET_HELPER_VPN_API_H
-#define GNUNET_HELPER_VPN_API_H
-
-/**
- * The handle to a helper.
- * sometimes a few entries may be made opaque.
- */
-struct GNUNET_VPN_HELPER_Handle
-{
-/**
- * PipeHandle to receive data from the helper
- */
- struct GNUNET_DISK_PipeHandle *helper_in;
-
-/**
- * PipeHandle to send data to the helper
- */
- struct GNUNET_DISK_PipeHandle *helper_out;
-
-/**
- * FileHandle to receive data from the helper
- */
- const struct GNUNET_DISK_FileHandle *fh_from_helper;
-
-/**
- * FileHandle to send data to the helper
- */
- const struct GNUNET_DISK_FileHandle *fh_to_helper;
-
- /**
- * The process id of the helper
- */
- struct GNUNET_OS_Process *helper_proc;
-
- /**
- * The Message-Tokenizer that tokenizes the messages comming from the helper
- */
- struct GNUNET_SERVER_MessageStreamTokenizer *mst;
-
- /**
- * The client-identifier passed to the mst-callback
- */
- void *client;
-
- /**
- * The name of the interface
- */
- char *ifname;
-
- /**
- * The task called when the helper dies.
- * Will be called with the handle as cls
- */
- GNUNET_SCHEDULER_Task restart_task;
-};
-
-/**
- * @brief Starts a helper and begins reading from it
- *
- * @param ifname The name of the new interface
- * @param ipv6addr The IPv6 address of the new interface
- * @param ipv6prefix The IPv6 prefix length of the new IP
- * @param ipv4addr The IPv4 address of the new interface
- * @param ipv4mask The associated netmask
- * @param process_name How the helper should appear in process-listings
- * @param restart_task The task called when the helper dies. Will be called with the handle as cls
- * @param cb A callback for messages from the helper
- * @param cb_cls Closure for the callback
- *
- * @return A pointer to the new Handle, NULL on error
- */
-struct GNUNET_VPN_HELPER_Handle *
-start_helper (const char *ifname, const char *ipv6addr, const char *ipv6prefix,
- const char *ipv4addr, const char *ipv4mask,
- const char *process_name, GNUNET_SCHEDULER_Task restart_task,
- GNUNET_SERVER_MessageTokenizerCallback cb, void *cb_cls);
-
-/**
- * @brief Kills the helper, closes the pipe and free()s the handle
- */
-void
-cleanup_helper (struct GNUNET_VPN_HELPER_Handle *);
-
-#endif /* end of include guard: GNUNET_HELPER_VPN_API_H */
projects / oweals / gnunet.git / commitdiff