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_wlan_sender.c
23 * @brief program to send via WLAN as much as possible (to test physical/theoretical throughput)
24 * @author David Brodski
30 #include <netinet/in.h>
34 #include "gnunet_protocols.h"
35 #include "plugin_transport_wlan.h"
40 * LLC fields for better compatibility
42 #define WLAN_LLC_DSAP_FIELD 0x1f
43 #define WLAN_LLC_SSAP_FIELD 0x1f
45 #define IEEE80211_ADDR_LEN 6 /* size of 802.11 address */
47 #define IEEE80211_FC0_VERSION_MASK 0x03
48 #define IEEE80211_FC0_VERSION_SHIFT 0
49 #define IEEE80211_FC0_VERSION_0 0x00
50 #define IEEE80211_FC0_TYPE_MASK 0x0c
51 #define IEEE80211_FC0_TYPE_SHIFT 2
52 #define IEEE80211_FC0_TYPE_MGT 0x00
53 #define IEEE80211_FC0_TYPE_CTL 0x04
54 #define IEEE80211_FC0_TYPE_DATA 0x08
58 * generic definitions for IEEE 802.11 frames
60 struct ieee80211_frame
64 u_int8_t i_addr1[IEEE80211_ADDR_LEN];
65 u_int8_t i_addr2[IEEE80211_ADDR_LEN];
66 u_int8_t i_addr3[IEEE80211_ADDR_LEN];
69 #if DEBUG_wlan_ip_udp_packets_on_air > 1
76 * function to fill the radiotap header
77 * @param header pointer to the radiotap header
78 * @return GNUNET_YES at success
81 getRadiotapHeader (struct Radiotap_Send *header)
93 * function to generate the wlan hardware header for one packet
94 * @param Header address to write the header to
95 * @param to_mac_addr pointer to the address of the recipient
96 * @param mac pointer to the mac address to send from (normally overwritten over by helper)
97 * @param size size of the whole packet, needed to calculate the time to send the packet
98 * @return GNUNET_YES if there was no error
101 getWlanHeader (struct ieee80211_frame *Header, const char *to_mac_addr,
102 const char *mac, unsigned int size)
105 const int rate = 11000000;
107 Header->i_fc[0] = IEEE80211_FC0_TYPE_DATA;
108 Header->i_fc[1] = 0x00;
109 memcpy (&Header->i_addr3, &mac_bssid, sizeof (mac_bssid));
110 memcpy (&Header->i_addr2, mac, sizeof (mac_bssid));
111 memcpy (&Header->i_addr1, to_mac_addr, sizeof (mac_bssid));
113 tmp16 = (uint16_t *) Header->i_dur;
114 *tmp16 = (uint16_t) htole16 ((size * 1000000) / rate + 290);
115 Header->llc[0] = WLAN_LLC_DSAP_FIELD;
116 Header->llc[1] = WLAN_LLC_SSAP_FIELD;
122 main (int argc, char *argv[])
124 char msg_buf[WLAN_MTU];
125 struct GNUNET_MessageHeader *msg;
126 struct ieee80211_frame *wlan_header;
127 struct Radiotap_Send *radiotap;
129 unsigned int temp[6];
142 "This program must be started with the interface and the targets and source mac as argument.\nThis program was compiled at ----- %s ----\n",
145 "Usage: interface-name mac-target mac-source\n"
146 "e.g. mon0 11-22-33-44-55-66 12-34-56-78-90-ab\n");
150 sscanf (argv[3], "%x-%x-%x-%x-%x-%x", &temp[0], &temp[1], &temp[2],
151 &temp[3], &temp[4], &temp[5]))
154 "Usage: interface-name mac-target mac-source\n"
155 "e.g. mon0 11-22-33-44-55-66 12-34-56-78-90-ab\n");
159 sscanf (argv[2], "%x-%x-%x-%x-%x-%x", &temp[0], &temp[1], &temp[2],
160 &temp[3], &temp[4], &temp[5]))
163 "Usage: interface-name mac-target mac-source\n"
164 "e.g. mon0 11-22-33-44-55-66 12-34-56-78-90-ab\n");
167 for (i = 0; i < 6; i++)
171 for (i = 0; i < 6; i++)
178 int commpipe[2]; /* This holds the fd for the input & output of the pipe */
180 /* Setup communication pipeline first */
183 fprintf (stderr, "Pipe error!\n");
187 /* Attempt to fork and check for errors */
188 if ((pid = fork ()) == -1)
190 fprintf (stderr, "Fork error. Exiting.\n"); /* something went wrong */
196 /* A positive (non-negative) PID indicates the parent process */
197 close (commpipe[0]); /* Close unused side of pipe (in side) */
198 setvbuf (stdout, (char *) NULL, _IONBF, 0); /* Set non-buffered output on stdout */
201 msg = (struct GNUNET_MessageHeader *) msg_buf;
202 msg->type = htons (GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
203 msg->size = htons (WLAN_MTU);
204 radiotap = (struct Radiotap_Send *) &msg[1];
205 wlan_header = (struct ieee80211_frame *) &radiotap[1];
208 getRadiotapHeader (radiotap);
209 getWlanHeader (wlan_header, outmac, inmac,
210 WLAN_MTU - sizeof (struct GNUNET_MessageHeader));
216 pos += write (commpipe[1], msg, WLAN_MTU - pos);
217 if (pos % WLAN_MTU == 0)
222 if (count % 1000 == 0)
225 bytes_per_s = count * WLAN_MTU / (akt - start);
227 printf ("send %f kbytes/s\n", bytes_per_s);
235 /* A zero PID indicates that this is the child process */
237 if (-1 == dup2 (commpipe[0], 0)) /* Replace stdin with the in side of the pipe */
238 fprintf (stderr, "dup2 failed: %s\n", strerror (errno));
239 (void) close (commpipe[1]); /* Close unused side of pipe (out side) */
240 /* Replace the child fork with a new process */
242 ("gnunet-transport-wlan-helper", "gnunet-transport-wlan-helper",
243 argv[1], NULL) == -1)
245 fprintf (stderr, "Could not start gnunet-transport-wlan-helper!");