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 void cleanup(void* cls, const struct GNUNET_SCHEDULER_TaskContext* tskctx) {
55 struct vpn_cls* mycls = (struct vpn_cls*) cls;
56 if (tskctx->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) {
57 PLIBC_KILL(mycls->helper_pid, SIGTERM);
58 GNUNET_OS_process_wait(mycls->helper_pid);
62 static void helper_read(void* cls, const struct GNUNET_SCHEDULER_TaskContext* tsdkctx);
64 static void start_helper_and_schedule(struct vpn_cls* mycls) {
65 mycls->helper_in = GNUNET_DISK_pipe(1);
66 mycls->helper_out = GNUNET_DISK_pipe(1);
68 mycls->helper_pid = GNUNET_OS_start_process(mycls->helper_in, mycls->helper_out, "gnunet-helper-vpn", "gnunet-helper-vpn", NULL);
70 mycls->fh_from_helper = GNUNET_DISK_pipe_handle (mycls->helper_out, GNUNET_DISK_PIPE_END_READ);
72 GNUNET_DISK_pipe_close_end(mycls->helper_out, GNUNET_DISK_PIPE_END_WRITE);
73 GNUNET_DISK_pipe_close_end(mycls->helper_in, GNUNET_DISK_PIPE_END_READ);
75 GNUNET_SCHEDULER_add_read_file (mycls->sched, GNUNET_TIME_UNIT_FOREVER_REL, mycls->fh_from_helper, &helper_read, mycls);
79 static void restart_helper(void* cls, const struct GNUNET_SCHEDULER_TaskContext* tskctx) {
80 // FIXME: Ratelimit this!
81 struct vpn_cls* mycls = (struct vpn_cls*) cls;
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) {
93 struct vpn_cls* mycls = (struct vpn_cls*) cls;
96 if (tsdkctx->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN)
99 int t = GNUNET_DISK_file_read(mycls->fh_from_helper, &buf, 65535);
101 fprintf(stderr, "Read error for header: %m\n");
102 GNUNET_SCHEDULER_add_now(mycls->sched, restart_helper, cls);
106 /* FIXME */ GNUNET_SERVER_mst_receive(mycls->mst, NULL, buf, t, 0, 0);
108 GNUNET_SCHEDULER_add_read_file (mycls->sched, GNUNET_TIME_UNIT_FOREVER_REL, mycls->fh_from_helper, &helper_read, mycls);
111 static void message_token(void *cls, void *client, const struct GNUNET_MessageHeader *message) {
112 if (ntohs(message->type) != GNUNET_MESSAGE_TYPE_VPN_HELPER) return;
114 struct tun_pkt *pkt_tun = (struct tun_pkt*) message;
116 fprintf(stderr, "Packet, Type: %x\n", ntohs(pkt_tun->tun.type));
118 if (ntohs(pkt_tun->tun.type) == 0x86dd) {
119 struct ip6_pkt *pkt6 = (struct ip6_pkt*) message;
120 struct ip6_tcp *pkt6_tcp;
121 struct ip6_udp *pkt6_udp;
124 switch(pkt6->ip6_hdr.nxthdr) {
126 pkt6_tcp = (struct ip6_tcp*)pkt6;
127 pkt_printf_ip6tcp(pkt6_tcp);
130 pkt6_udp = (struct ip6_udp*)pkt6;
131 pkt_printf_ip6udp(pkt6_udp);
132 if (ntohs(pkt6_udp->udp_hdr.dpt) == 53) {
133 pkt_printf_ip6dns((struct ip6_udp_dns*)pkt6_udp);
137 } else if (ntohs(pkt_tun->tun.type) == 0x0800) {
138 struct ip_pkt *pkt = (struct ip_pkt*) message;
139 struct ip_udp *udp = (struct ip_udp*) message;
140 fprintf(stderr, "IPv4\n");
141 if (pkt->ip_hdr.proto == 0x11 && ntohl(udp->ip_hdr.dadr) == 0x0a0a0a02 && ntohs(udp->udp_hdr.dpt) == 53 ) {
142 pkt_printf_ipdns((struct ip_udp_dns*)udp);
149 * Main function that will be run by the scheduler.
152 * @param sched the scheduler to use
153 * @param args remaining command-line arguments
154 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
155 * @param cfg configuration
159 struct GNUNET_SCHEDULER_Handle *sched,
162 const struct GNUNET_CONFIGURATION_Handle *cfg) {
164 struct vpn_cls* mycls = (struct vpn_cls*) cls;
166 mycls->sched = sched;
168 mycls->mst = GNUNET_SERVER_mst_create(&message_token, mycls);
170 GNUNET_SCHEDULER_add_delayed(sched, GNUNET_TIME_UNIT_FOREVER_REL, &cleanup, cls);
172 start_helper_and_schedule(mycls);
177 * The main function to obtain template from gnunetd.
179 * @param argc number of arguments from the command line
180 * @param argv command line arguments
181 * @return 0 ok, 1 on error
184 main (int argc, char *const *argv)
186 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
187 GNUNET_GETOPT_OPTION_END
190 struct vpn_cls* cls = GNUNET_malloc(sizeof(struct vpn_cls));
193 GNUNET_PROGRAM_run (argc,
196 gettext_noop ("help text"),
197 options, &run, cls)) ? ret : 1;
199 GNUNET_free(cls); // Make clang happy
202 /* end of gnunet-daemon-vpn.c */