2 This file is part of GNUnet.
3 (C) 2010 Christian Grothoff
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file vpn/gnunet-daemon-vpn.c
24 * @author Philipp Tölke
27 #include "gnunet_getopt_lib.h"
28 #include "gnunet_program_lib.h"
29 #include "gnunet_os_lib.h"
30 #include "gnunet-vpn-helper-p.h"
31 #include "gnunet-vpn-packet.h"
32 #include "gnunet-vpn-pretty-print.h"
33 #include "gnunet_common.h"
34 #include "gnunet_protocols.h"
35 #include "gnunet_server_lib.h"
36 /* #include "gnunet_template_service.h" */
44 struct GNUNET_DISK_PipeHandle* helper_in; // From the helper
45 struct GNUNET_DISK_PipeHandle* helper_out; // To the helper
46 const struct GNUNET_DISK_FileHandle* fh_from_helper;
48 struct GNUNET_SERVER_MessageStreamTokenizer* mst;
50 struct GNUNET_SCHEDULER_Handle *sched;
55 static void cleanup(void* cls, const struct GNUNET_SCHEDULER_TaskContext* tskctx) {
56 struct vpn_cls* mycls = (struct vpn_cls*) cls;
57 if (tskctx->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) {
58 PLIBC_KILL(mycls->helper_pid, SIGTERM);
59 GNUNET_OS_process_wait(mycls->helper_pid);
63 static void helper_read(void* cls, const struct GNUNET_SCHEDULER_TaskContext* tsdkctx);
65 static void start_helper_and_schedule(struct vpn_cls* mycls) {
66 mycls->helper_in = GNUNET_DISK_pipe(1);
67 mycls->helper_out = GNUNET_DISK_pipe(1);
69 mycls->helper_pid = GNUNET_OS_start_process(mycls->helper_in, mycls->helper_out, "gnunet-vpn-helper", "gnunet-vpn-helper", NULL);
71 mycls->fh_from_helper = GNUNET_DISK_pipe_handle (mycls->helper_out, GNUNET_DISK_PIPE_END_READ);
73 GNUNET_DISK_pipe_close_end(mycls->helper_out, GNUNET_DISK_PIPE_END_WRITE);
74 GNUNET_DISK_pipe_close_end(mycls->helper_in, GNUNET_DISK_PIPE_END_READ);
76 GNUNET_SCHEDULER_add_read_file (mycls->sched, GNUNET_TIME_UNIT_FOREVER_REL, mycls->fh_from_helper, &helper_read, mycls);
80 static void restart_helper(void* cls, const struct GNUNET_SCHEDULER_TaskContext* tskctx) {
81 // FIXME: Ratelimit this!
82 struct vpn_cls* mycls = (struct vpn_cls*) cls;
85 PLIBC_KILL(mycls->helper_pid, SIGKILL);
86 GNUNET_OS_process_wait(mycls->helper_pid);
89 start_helper_and_schedule(mycls);
93 static void helper_read(void* cls, const struct GNUNET_SCHEDULER_TaskContext* tsdkctx) {
94 struct vpn_cls* mycls = (struct vpn_cls*) cls;
97 if (tsdkctx->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN)
100 int t = GNUNET_DISK_file_read(mycls->fh_from_helper, &buf, 65535);
102 fprintf(stderr, "Read error for header: %m\n");
103 GNUNET_SCHEDULER_add_now(mycls->sched, restart_helper, cls);
107 /* FIXME */ GNUNET_SERVER_mst_receive(mycls->mst, NULL, buf, t, 0, 0);
109 GNUNET_SCHEDULER_add_read_file (mycls->sched, GNUNET_TIME_UNIT_FOREVER_REL, mycls->fh_from_helper, &helper_read, mycls);
112 static void message_token(void *cls, void *client, const struct GNUNET_MessageHeader *message) {
113 if (ntohs(message->type) != GNUNET_MESSAGE_TYPE_VPN_HELPER) return;
115 struct ip6_pkt *pkt6 = (struct ip6_pkt*) message;
116 struct ip6_tcp *pkt6_tcp;
117 struct ip6_udp *pkt6_udp;
120 switch(pkt6->ip6_hdr.nxthdr) {
122 pkt6_tcp = (struct ip6_tcp*)pkt6;
123 pkt_printf_ip6tcp(pkt6_tcp);
126 pkt6_udp = (struct ip6_udp*)pkt6;
127 pkt_printf_ip6udp(pkt6_udp);
128 if (ntohs(pkt6_udp->udp_hdr.dpt) == 53) {
129 pkt_printf_ip6dns((struct ip6_udp_dns*)pkt6_udp);
137 * Main function that will be run by the scheduler.
140 * @param sched the scheduler to use
141 * @param args remaining command-line arguments
142 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
143 * @param cfg configuration
147 struct GNUNET_SCHEDULER_Handle *sched,
150 const struct GNUNET_CONFIGURATION_Handle *cfg) {
152 struct vpn_cls* mycls = (struct vpn_cls*) cls;
154 mycls->sched = sched;
156 mycls->mst = GNUNET_SERVER_mst_create(&message_token, mycls);
158 GNUNET_SCHEDULER_add_delayed(sched, GNUNET_TIME_UNIT_FOREVER_REL, &cleanup, cls);
160 start_helper_and_schedule(mycls);
165 * The main function to obtain template from gnunetd.
167 * @param argc number of arguments from the command line
168 * @param argv command line arguments
169 * @return 0 ok, 1 on error
172 main (int argc, char *const *argv)
174 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
175 GNUNET_GETOPT_OPTION_END
178 struct vpn_cls* cls = GNUNET_malloc(sizeof(struct vpn_cls));
181 GNUNET_PROGRAM_run (argc,
184 gettext_noop ("help text"),
185 options, &run, cls)) ? ret : 1;
187 GNUNET_free(cls); // Make clang happy
190 /* end of gnunet-daemon-vpn.c */