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
51 * function to fill the radiotap header
52 * @param header pointer to the radiotap header
53 * @param size total message size
54 * @return GNUNET_YES at success
57 getRadiotapHeader (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *header,
60 header->header.size = htons (size);
61 header->header.type = htons (GNUNET_MESSAGE_TYPE_WLAN_DATA_TO_HELPER);
69 * function to generate the wlan hardware header for one packet
70 * @param Header address to write the header to
71 * @param to_mac_addr pointer to the address of the recipient
72 * @param mac pointer to the mac address to send from (normally overwritten over by helper)
73 * @param size size of the whole packet, needed to calculate the time to send the packet
74 * @return GNUNET_YES if there was no error
77 getWlanHeader (struct GNUNET_TRANSPORT_WLAN_Ieee80211Frame *Header,
78 const struct GNUNET_TRANSPORT_WLAN_MacAddress *to_mac_addr,
79 const struct GNUNET_TRANSPORT_WLAN_MacAddress *mac, unsigned int size)
81 const int rate = 11000000;
83 Header->frame_control = htons (IEEE80211_FC0_TYPE_DATA);
84 Header->addr3 = mac_bssid_gnunet;
86 Header->addr1 = *to_mac_addr;
87 Header->duration = GNUNET_htole16 ((size * 1000000) / rate + 290);
88 Header->llc[0] = WLAN_LLC_DSAP_FIELD;
89 Header->llc[1] = WLAN_LLC_SSAP_FIELD;
90 Header->llc[2] = 0; // FIXME
91 Header->llc[3] = 0; // FIXME
97 main (int argc, char *argv[])
99 char msg_buf[WLAN_MTU];
100 struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *radiotap;
101 unsigned int temp[6];
102 struct GNUNET_TRANSPORT_WLAN_MacAddress inmac;
103 struct GNUNET_TRANSPORT_WLAN_MacAddress outmac;
114 "This program must be started with the interface and the targets and source mac as argument.\n");
116 "Usage: interface-name mac-target mac-source\n"
117 "e.g. mon0 11-22-33-44-55-66 12-34-56-78-90-ab\n");
121 SSCANF (argv[3], "%x-%x-%x-%x-%x-%x", &temp[0], &temp[1], &temp[2],
122 &temp[3], &temp[4], &temp[5]))
125 "Usage: interface-name mac-target mac-source\n"
126 "e.g. mon0 11-22-33-44-55-66 12-34-56-78-90-ab\n");
129 for (i = 0; i < 6; i++)
130 outmac.mac[i] = temp[i];
132 SSCANF (argv[2], "%x-%x-%x-%x-%x-%x", &temp[0], &temp[1], &temp[2],
133 &temp[3], &temp[4], &temp[5]))
136 "Usage: interface-name mac-target mac-source\n"
137 "e.g. mon0 11-22-33-44-55-66 12-34-56-78-90-ab\n");
140 for (i = 0; i < 6; i++)
141 inmac.mac[i] = temp[i];
144 int commpipe[2]; /* This holds the fd for the input & output of the pipe */
146 /* Setup communication pipeline first */
150 "Failed to create pipe: %s\n",
155 /* Attempt to fork and check for errors */
156 if ((pid = fork ()) == -1)
158 fprintf (stderr, "Failed to fork: %s\n",
165 /* A positive (non-negative) PID indicates the parent process */
166 close (commpipe[0]); /* Close unused side of pipe (in side) */
167 setvbuf (stdout, (char *) NULL, _IONBF, 0); /* Set non-buffered output on stdout */
170 radiotap = (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *) msg_buf;
171 getRadiotapHeader (radiotap, WLAN_MTU);
173 getWlanHeader (&radiotap->frame, &outmac, &inmac,
179 pos += write (commpipe[1], msg_buf, WLAN_MTU - pos);
180 if (pos % WLAN_MTU == 0)
185 if (count % 1000 == 0)
188 bytes_per_s = count * WLAN_MTU / (akt - start);
190 printf ("send %f kbytes/s\n", bytes_per_s);
198 /* A zero PID indicates that this is the child process */
200 if (-1 == dup2 (commpipe[0], 0)) /* Replace stdin with the in side of the pipe */
201 fprintf (stderr, "dup2 failed: %s\n", strerror (errno));
202 (void) close (commpipe[1]); /* Close unused side of pipe (out side) */
203 /* Replace the child fork with a new process */
205 ("gnunet-helper-transport-wlan", "gnunet-helper-transport-wlan",
206 argv[1], NULL) == -1)
208 fprintf (stderr, "Could not start gnunet-helper-transport-wlan!");