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_template_service.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_SCHEDULER_Handle *sched;
52 static void cleanup(void* cls, const struct GNUNET_SCHEDULER_TaskContext* tskctx) {
53 struct vpn_cls* mycls = (struct vpn_cls*) cls;
54 if (tskctx->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) {
55 PLIBC_KILL(mycls->helper_pid, SIGTERM);
56 GNUNET_OS_process_wait(mycls->helper_pid);
60 static void helper_read(void* cls, const struct GNUNET_SCHEDULER_TaskContext* tsdkctx);
62 static void start_helper_and_schedule(struct vpn_cls* mycls) {
63 mycls->helper_in = GNUNET_DISK_pipe(1);
64 mycls->helper_out = GNUNET_DISK_pipe(1);
66 mycls->helper_pid = GNUNET_OS_start_process(mycls->helper_in, mycls->helper_out, "gnunet-vpn-helper", "gnunet-vpn-helper", NULL);
68 mycls->fh_from_helper = GNUNET_DISK_pipe_handle (mycls->helper_out, GNUNET_DISK_PIPE_END_READ);
70 GNUNET_DISK_pipe_close_end(mycls->helper_out, GNUNET_DISK_PIPE_END_WRITE);
71 GNUNET_DISK_pipe_close_end(mycls->helper_in, GNUNET_DISK_PIPE_END_READ);
73 GNUNET_SCHEDULER_add_read_file (mycls->sched, GNUNET_TIME_UNIT_FOREVER_REL, mycls->fh_from_helper, &helper_read, mycls);
77 static void restart_helper(void* cls, const struct GNUNET_SCHEDULER_TaskContext* tskctx) {
78 struct vpn_cls* mycls = (struct vpn_cls*) cls;
81 PLIBC_KILL(mycls->helper_pid, SIGTERM);
82 GNUNET_OS_process_wait(mycls->helper_pid);
85 start_helper_and_schedule(mycls);
89 static void helper_read(void* cls, const struct GNUNET_SCHEDULER_TaskContext* tsdkctx) {
90 struct vpn_cls* mycls = (struct vpn_cls*) cls;
91 struct GNUNET_MessageHeader hdr = { .size = 0, .type = 0 };
95 if (tsdkctx->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN)
98 while (r < sizeof(struct GNUNET_MessageHeader)) {
99 int t = GNUNET_DISK_file_read(mycls->fh_from_helper, &hdr, sizeof(struct GNUNET_MessageHeader));
101 fprintf(stderr, "Read error for header: %m\n");
102 GNUNET_SCHEDULER_add_now(mycls->sched, restart_helper, cls);
108 struct suid_packet *pkt = (struct suid_packet*) GNUNET_malloc(ntohs(hdr.size));
110 memcpy(pkt, &hdr, sizeof(struct GNUNET_MessageHeader));
112 while (r < ntohs(pkt->hdr.size)) {
113 int t = GNUNET_DISK_file_read(mycls->fh_from_helper, (unsigned char*)pkt + r, ntohs(pkt->hdr.size) - r);
115 fprintf(stderr, "Read error for data: %m\n");
116 GNUNET_SCHEDULER_add_now(mycls->sched, restart_helper, cls);
122 struct ip6_pkt *pkt6 = (struct ip6_pkt*) pkt;
123 struct ip6_tcp *pkt6_tcp;
124 struct ip6_udp *pkt6_udp;
127 switch(pkt6->ip6_hdr.nxthdr) {
129 pkt6_tcp = (struct ip6_tcp*)pkt6;
130 pkt_printf_ip6tcp(pkt6_tcp);
133 pkt6_udp = (struct ip6_udp*)pkt6;
134 pkt_printf_ip6udp(pkt6_udp);
135 if (ntohs(pkt6_udp->udp_hdr.dpt) == 53) {
136 pkt_printf_ip6dns((struct ip6_udp_dns*)pkt6_udp);
143 GNUNET_SCHEDULER_add_read_file (mycls->sched, GNUNET_TIME_UNIT_FOREVER_REL, mycls->fh_from_helper, &helper_read, mycls);
147 * Main function that will be run by the scheduler.
150 * @param sched the scheduler to use
151 * @param args remaining command-line arguments
152 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
153 * @param cfg configuration
157 struct GNUNET_SCHEDULER_Handle *sched,
160 const struct GNUNET_CONFIGURATION_Handle *cfg) {
162 struct vpn_cls* mycls = (struct vpn_cls*) cls;
164 mycls->sched = sched;
166 GNUNET_SCHEDULER_add_delayed(sched, GNUNET_TIME_UNIT_FOREVER_REL, &cleanup, cls);
168 start_helper_and_schedule(mycls);
173 * The main function to obtain template from gnunetd.
175 * @param argc number of arguments from the command line
176 * @param argv command line arguments
177 * @return 0 ok, 1 on error
180 main (int argc, char *const *argv)
182 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
183 GNUNET_GETOPT_OPTION_END
186 struct vpn_cls* cls = (struct vpn_cls*)malloc(sizeof(struct vpn_cls));
189 GNUNET_PROGRAM_run (argc,
192 gettext_noop ("help text"),
193 options, &run, cls)) ? ret : 1;
196 /* end of gnunet-daemon-vpn.c */