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"
43 struct GNUNET_DISK_PipeHandle* helper_in; // From the helper
44 struct GNUNET_DISK_PipeHandle* helper_out; // To the helper
45 const struct GNUNET_DISK_FileHandle* fh_from_helper;
47 struct GNUNET_SERVER_MessageStreamTokenizer* mst;
49 struct GNUNET_SCHEDULER_Handle *sched;
54 static struct vpn_cls mycls;
56 static void cleanup(void* cls, const struct GNUNET_SCHEDULER_TaskContext* tskctx) {
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() {
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-helper-vpn", "gnunet-helper-vpn", 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, NULL);
80 static void restart_helper(void* cls, const struct GNUNET_SCHEDULER_TaskContext* tskctx) {
81 // FIXME: Ratelimit this!
84 PLIBC_KILL(mycls.helper_pid, SIGKILL);
85 GNUNET_OS_process_wait(mycls.helper_pid);
88 start_helper_and_schedule(mycls);
92 static void helper_read(void* cls, const struct GNUNET_SCHEDULER_TaskContext* tsdkctx) {
95 if (tsdkctx->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN)
98 int t = GNUNET_DISK_file_read(mycls.fh_from_helper, &buf, 65535);
100 fprintf(stderr, "Read error for header: %m\n");
101 GNUNET_SCHEDULER_add_now(mycls.sched, restart_helper, cls);
105 /* FIXME */ GNUNET_SERVER_mst_receive(mycls.mst, NULL, buf, t, 0, 0);
107 GNUNET_SCHEDULER_add_read_file (mycls.sched, GNUNET_TIME_UNIT_FOREVER_REL, mycls.fh_from_helper, &helper_read, NULL);
110 static void message_token(void *cls, void *client, const struct GNUNET_MessageHeader *message) {
111 if (ntohs(message->type) != GNUNET_MESSAGE_TYPE_VPN_HELPER) return;
113 struct tun_pkt *pkt_tun = (struct tun_pkt*) message;
115 fprintf(stderr, "Packet, Type: %x\n", ntohs(pkt_tun->tun.type));
117 if (ntohs(pkt_tun->tun.type) == 0x86dd) {
118 struct ip6_pkt *pkt6 = (struct ip6_pkt*) message;
119 struct ip6_tcp *pkt6_tcp;
120 struct ip6_udp *pkt6_udp;
123 switch(pkt6->ip6_hdr.nxthdr) {
125 pkt6_tcp = (struct ip6_tcp*)pkt6;
126 pkt_printf_ip6tcp(pkt6_tcp);
129 pkt6_udp = (struct ip6_udp*)pkt6;
130 pkt_printf_ip6udp(pkt6_udp);
131 if (ntohs(pkt6_udp->udp_hdr.dpt) == 53) {
132 pkt_printf_ip6dns((struct ip6_udp_dns*)pkt6_udp);
136 } else if (ntohs(pkt_tun->tun.type) == 0x0800) {
137 struct ip_pkt *pkt = (struct ip_pkt*) message;
138 struct ip_udp *udp = (struct ip_udp*) message;
139 fprintf(stderr, "IPv4\n");
140 if (pkt->ip_hdr.proto == 0x11 && ntohl(udp->ip_hdr.dadr) == 0x0a0a0a02 && ntohs(udp->udp_hdr.dpt) == 53 ) {
141 pkt_printf_ipdns((struct ip_udp_dns*)udp);
148 * Main function that will be run by the scheduler.
151 * @param sched the scheduler to use
152 * @param args remaining command-line arguments
153 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
154 * @param cfg configuration
158 struct GNUNET_SCHEDULER_Handle *sched,
161 const struct GNUNET_CONFIGURATION_Handle *cfg)
164 mycls.mst = GNUNET_SERVER_mst_create(&message_token, NULL);
165 GNUNET_SCHEDULER_add_delayed(sched, GNUNET_TIME_UNIT_FOREVER_REL, &cleanup, cls);
166 start_helper_and_schedule(mycls);
171 * The main function to obtain template from gnunetd.
173 * @param argc number of arguments from the command line
174 * @param argv command line arguments
175 * @return 0 ok, 1 on error
178 main (int argc, char *const *argv)
180 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
181 GNUNET_GETOPT_OPTION_END
185 GNUNET_PROGRAM_run (argc,
188 gettext_noop ("help text"),
189 options, &run, NULL)) ? ret : 1;
192 /* end of gnunet-daemon-vpn.c */