2 This file is part of GNUnet
3 Copyright (C) 2011 GNUnet e.V.
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your 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 Affero General Public License for more details.
17 * @file transport/gnunet-transport-wlan-sender.c
18 * @brief program to send via WLAN as much as possible (to test physical/theoretical throughput)
19 * @author David Brodski
22 #include "plugin_transport_wlan.h"
23 #include "gnunet_protocols.h"
28 * LLC fields for better compatibility
30 #define WLAN_LLC_DSAP_FIELD 0x1f
31 #define WLAN_LLC_SSAP_FIELD 0x1f
33 #define IEEE80211_ADDR_LEN 6 /* size of 802.11 address */
35 #define IEEE80211_FC0_VERSION_MASK 0x03
36 #define IEEE80211_FC0_VERSION_SHIFT 0
37 #define IEEE80211_FC0_VERSION_0 0x00
38 #define IEEE80211_FC0_TYPE_MASK 0x0c
39 #define IEEE80211_FC0_TYPE_SHIFT 2
40 #define IEEE80211_FC0_TYPE_MGT 0x00
41 #define IEEE80211_FC0_TYPE_CTL 0x04
42 #define IEEE80211_FC0_TYPE_DATA 0x08
46 * function to fill the radiotap header
47 * @param header pointer to the radiotap header
48 * @param size total message size
49 * @return GNUNET_YES at success
52 getRadiotapHeader (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *header,
55 header->header.size = htons (size);
56 header->header.type = htons (GNUNET_MESSAGE_TYPE_WLAN_DATA_TO_HELPER);
64 * function to generate the wlan hardware header for one packet
65 * @param Header address to write the header to
66 * @param to_mac_addr pointer to the address of the recipient
67 * @param mac pointer to the mac address to send from (normally overwritten over by helper)
68 * @param size size of the whole packet, needed to calculate the time to send the packet
69 * @return GNUNET_YES if there was no error
72 getWlanHeader (struct GNUNET_TRANSPORT_WLAN_Ieee80211Frame *Header,
73 const struct GNUNET_TRANSPORT_WLAN_MacAddress *to_mac_addr,
74 const struct GNUNET_TRANSPORT_WLAN_MacAddress *mac, unsigned int size)
76 const int rate = 11000000;
78 Header->frame_control = htons (IEEE80211_FC0_TYPE_DATA);
79 Header->addr3 = mac_bssid_gnunet;
81 Header->addr1 = *to_mac_addr;
82 Header->duration = GNUNET_htole16 ((size * 1000000) / rate + 290);
83 Header->llc[0] = WLAN_LLC_DSAP_FIELD;
84 Header->llc[1] = WLAN_LLC_SSAP_FIELD;
85 Header->llc[2] = 0; // FIXME
86 Header->llc[3] = 0; // FIXME
92 main (int argc, char *argv[])
94 char msg_buf[WLAN_MTU];
95 struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *radiotap;
97 struct GNUNET_TRANSPORT_WLAN_MacAddress inmac;
98 struct GNUNET_TRANSPORT_WLAN_MacAddress outmac;
99 struct GNUNET_TRANSPORT_WLAN_HelperControlMessage hcm;
100 unsigned long long count;
107 int commpipe[2]; /* This holds the fd for the input & output of the pipe */
108 int macpipe[2]; /* This holds the fd for the input & output of the pipe */
113 "This program must be started with the interface and the targets and source mac as argument.\n");
115 "Usage: interface-name mac-DST mac-SRC\n"
116 "e.g. mon0 11-22-33-44-55-66 12-34-56-78-90-ab\n");
120 SSCANF (argv[2], "%x-%x-%x-%x-%x-%x", &temp[0], &temp[1], &temp[2],
121 &temp[3], &temp[4], &temp[5]))
124 "Usage: interface-name mac-DST mac-SRC\n"
125 "e.g. mon0 11-22-33-44-55-66 12-34-56-78-90-ab\n");
128 for (i = 0; i < 6; i++)
129 outmac.mac[i] = temp[i];
131 SSCANF (argv[3], "%x-%x-%x-%x-%x-%x", &temp[0], &temp[1], &temp[2],
132 &temp[3], &temp[4], &temp[5]))
135 "Usage: interface-name mac-DST mac-SRC\n"
136 "e.g. mon0 11-22-33-44-55-66 12-34-56-78-90-ab\n");
139 for (i = 0; i < 6; i++)
140 inmac.mac[i] = temp[i];
143 /* Setup communication pipeline first */
147 "Failed to create pipe: %s\n",
154 "Failed to create pipe: %s\n",
159 /* Attempt to fork and check for errors */
160 if ((pid = fork ()) == -1)
162 fprintf (stderr, "Failed to fork: %s\n",
166 memset (msg_buf, 0x42, sizeof (msg_buf));
169 /* A positive (non-negative) PID indicates the parent process */
170 if (0 != close (commpipe[0])) /* Close unused side of pipe (in side) */
172 "Failed to close fd: %s\n",
174 setvbuf (stdout, (char *) NULL, _IONBF, 0); /* Set non-buffered output on stdout */
176 if (0 != close (macpipe[1]))
178 "Failed to close fd: %s\n",
180 if (sizeof (hcm) != read (macpipe[0], &hcm, sizeof (hcm)))
182 "Failed to read hcm...\n");
184 "Got MAC %.2X:%.2X:%.2X:%.2X:%.2X:%.2X\n",
185 hcm.mac.mac[0], hcm.mac.mac[1],
186 hcm.mac.mac[2], hcm.mac.mac[3], hcm.mac.mac[4], hcm.mac.mac[5]);
187 radiotap = (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *) msg_buf;
188 getRadiotapHeader (radiotap, WLAN_MTU);
189 getWlanHeader (&radiotap->frame, &outmac, &inmac,
195 ret = write (commpipe[1], msg_buf, WLAN_MTU);
198 fprintf (stderr, "write failed: %s\n", strerror (errno));
203 if (akt - start > 30)
205 bytes_per_s = count / (akt - start);
207 printf ("send %f kbytes/s\n", bytes_per_s);
215 /* A zero PID indicates that this is the child process */
218 if (-1 == dup2 (commpipe[0], 0)) /* Replace stdin with the in side of the pipe */
219 fprintf (stderr, "dup2 failed: %s\n", strerror (errno));
220 if (-1 == dup2 (macpipe[1], 1)) /* Replace stdout with the out side of the pipe */
221 fprintf (stderr, "dup2 failed: %s\n", strerror (errno));
222 (void) close (commpipe[1]); /* Close unused side of pipe (out side) */
223 (void) close (macpipe[0]); /* Close unused side of pipe (in side) */
224 /* Replace the child fork with a new process */
226 ("gnunet-helper-transport-wlan", "gnunet-helper-transport-wlan",
227 argv[1], NULL) == -1)
229 fprintf (stderr, "Could not start gnunet-helper-transport-wlan!");