2 This file is part of GNUnet
3 (C) 2011 Christian Grothoff (and other contributing authors)
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 transport/gnunet-transport-wlan-sender.c
23 * @brief program to send via WLAN as much as possible (to test physical/theoretical throughput)
24 * @author David Brodski
27 #include "gnunet_protocols.h"
28 #include "plugin_transport_wlan.h"
33 * LLC fields for better compatibility
35 #define WLAN_LLC_DSAP_FIELD 0x1f
36 #define WLAN_LLC_SSAP_FIELD 0x1f
38 #define IEEE80211_ADDR_LEN 6 /* size of 802.11 address */
40 #define IEEE80211_FC0_VERSION_MASK 0x03
41 #define IEEE80211_FC0_VERSION_SHIFT 0
42 #define IEEE80211_FC0_VERSION_0 0x00
43 #define IEEE80211_FC0_TYPE_MASK 0x0c
44 #define IEEE80211_FC0_TYPE_SHIFT 2
45 #define IEEE80211_FC0_TYPE_MGT 0x00
46 #define IEEE80211_FC0_TYPE_CTL 0x04
47 #define IEEE80211_FC0_TYPE_DATA 0x08
49 GNUNET_NETWORK_STRUCT_BEGIN
52 * generic definitions for IEEE 802.11 frames
54 struct ieee80211_frame
58 u_int8_t i_addr1[IEEE80211_ADDR_LEN];
59 u_int8_t i_addr2[IEEE80211_ADDR_LEN];
60 u_int8_t i_addr3[IEEE80211_ADDR_LEN];
64 GNUNET_NETWORK_STRUCT_END
67 * function to fill the radiotap header
68 * @param header pointer to the radiotap header
69 * @return GNUNET_YES at success
72 getRadiotapHeader (struct Radiotap_Send *header)
82 * function to generate the wlan hardware header for one packet
83 * @param Header address to write the header to
84 * @param to_mac_addr pointer to the address of the recipient
85 * @param mac pointer to the mac address to send from (normally overwritten over by helper)
86 * @param size size of the whole packet, needed to calculate the time to send the packet
87 * @return GNUNET_YES if there was no error
90 getWlanHeader (struct ieee80211_frame *Header, const char *to_mac_addr,
91 const char *mac, unsigned int size)
94 const int rate = 11000000;
96 Header->i_fc[0] = IEEE80211_FC0_TYPE_DATA;
97 Header->i_fc[1] = 0x00;
98 memcpy (&Header->i_addr3, &mac_bssid_gnunet, sizeof (mac_bssid_gnunet));
99 memcpy (&Header->i_addr2, mac, sizeof (mac_bssid_gnunet));
100 memcpy (&Header->i_addr1, to_mac_addr, sizeof (mac_bssid_gnunet));
102 tmp16 = (uint16_t *) Header->i_dur;
103 *tmp16 = (uint16_t) GNUNET_htole16 ((size * 1000000) / rate + 290);
104 Header->llc[0] = WLAN_LLC_DSAP_FIELD;
105 Header->llc[1] = WLAN_LLC_SSAP_FIELD;
112 main (int argc, char *argv[])
114 char msg_buf[WLAN_MTU];
115 struct GNUNET_MessageHeader *msg;
116 struct ieee80211_frame *wlan_header;
117 struct Radiotap_Send *radiotap;
119 unsigned int temp[6];
132 "This program must be started with the interface and the targets and source mac as argument.\n");
134 "Usage: interface-name mac-target mac-source\n"
135 "e.g. mon0 11-22-33-44-55-66 12-34-56-78-90-ab\n");
139 sscanf (argv[3], "%x-%x-%x-%x-%x-%x", &temp[0], &temp[1], &temp[2],
140 &temp[3], &temp[4], &temp[5]))
143 "Usage: interface-name mac-target mac-source\n"
144 "e.g. mon0 11-22-33-44-55-66 12-34-56-78-90-ab\n");
148 sscanf (argv[2], "%x-%x-%x-%x-%x-%x", &temp[0], &temp[1], &temp[2],
149 &temp[3], &temp[4], &temp[5]))
152 "Usage: interface-name mac-target mac-source\n"
153 "e.g. mon0 11-22-33-44-55-66 12-34-56-78-90-ab\n");
156 for (i = 0; i < 6; i++)
158 for (i = 0; i < 6; i++)
162 int commpipe[2]; /* This holds the fd for the input & output of the pipe */
164 /* Setup communication pipeline first */
168 "Failed to create pipe: %s\n",
173 /* Attempt to fork and check for errors */
174 if ((pid = fork ()) == -1)
176 fprintf (stderr, "Failed to fork: %s\n",
183 /* A positive (non-negative) PID indicates the parent process */
184 close (commpipe[0]); /* Close unused side of pipe (in side) */
185 setvbuf (stdout, (char *) NULL, _IONBF, 0); /* Set non-buffered output on stdout */
188 msg = (struct GNUNET_MessageHeader *) msg_buf;
189 msg->type = htons (GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
190 msg->size = htons (WLAN_MTU);
191 radiotap = (struct Radiotap_Send *) &msg[1];
192 wlan_header = (struct ieee80211_frame *) &radiotap[1];
195 getRadiotapHeader (radiotap);
196 getWlanHeader (wlan_header, outmac, inmac,
197 WLAN_MTU - sizeof (struct GNUNET_MessageHeader));
203 pos += write (commpipe[1], msg, WLAN_MTU - pos);
204 if (pos % WLAN_MTU == 0)
209 if (count % 1000 == 0)
212 bytes_per_s = count * WLAN_MTU / (akt - start);
214 printf ("send %f kbytes/s\n", bytes_per_s);
222 /* A zero PID indicates that this is the child process */
224 if (-1 == dup2 (commpipe[0], 0)) /* Replace stdin with the in side of the pipe */
225 fprintf (stderr, "dup2 failed: %s\n", strerror (errno));
226 (void) close (commpipe[1]); /* Close unused side of pipe (out side) */
227 /* Replace the child fork with a new process */
229 ("gnunet-helper-transport-wlan", "gnunet-helper-transport-wlan",
230 argv[1], NULL) == -1)
232 fprintf (stderr, "Could not start gnunet-helper-transport-wlan!");