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 Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
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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.
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 * @file transport/gnunet-transport-wlan-sender.c
21 * @brief program to send via WLAN as much as possible (to test physical/theoretical throughput)
22 * @author David Brodski
25 #include "plugin_transport_wlan.h"
26 #include "gnunet_protocols.h"
31 * LLC fields for better compatibility
33 #define WLAN_LLC_DSAP_FIELD 0x1f
34 #define WLAN_LLC_SSAP_FIELD 0x1f
36 #define IEEE80211_ADDR_LEN 6 /* size of 802.11 address */
38 #define IEEE80211_FC0_VERSION_MASK 0x03
39 #define IEEE80211_FC0_VERSION_SHIFT 0
40 #define IEEE80211_FC0_VERSION_0 0x00
41 #define IEEE80211_FC0_TYPE_MASK 0x0c
42 #define IEEE80211_FC0_TYPE_SHIFT 2
43 #define IEEE80211_FC0_TYPE_MGT 0x00
44 #define IEEE80211_FC0_TYPE_CTL 0x04
45 #define IEEE80211_FC0_TYPE_DATA 0x08
49 * function to fill the radiotap header
50 * @param header pointer to the radiotap header
51 * @param size total message size
52 * @return GNUNET_YES at success
55 getRadiotapHeader (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *header,
58 header->header.size = htons (size);
59 header->header.type = htons (GNUNET_MESSAGE_TYPE_WLAN_DATA_TO_HELPER);
67 * function to generate the wlan hardware header for one packet
68 * @param Header address to write the header to
69 * @param to_mac_addr pointer to the address of the recipient
70 * @param mac pointer to the mac address to send from (normally overwritten over by helper)
71 * @param size size of the whole packet, needed to calculate the time to send the packet
72 * @return GNUNET_YES if there was no error
75 getWlanHeader (struct GNUNET_TRANSPORT_WLAN_Ieee80211Frame *Header,
76 const struct GNUNET_TRANSPORT_WLAN_MacAddress *to_mac_addr,
77 const struct GNUNET_TRANSPORT_WLAN_MacAddress *mac, unsigned int size)
79 const int rate = 11000000;
81 Header->frame_control = htons (IEEE80211_FC0_TYPE_DATA);
82 Header->addr3 = mac_bssid_gnunet;
84 Header->addr1 = *to_mac_addr;
85 Header->duration = GNUNET_htole16 ((size * 1000000) / rate + 290);
86 Header->llc[0] = WLAN_LLC_DSAP_FIELD;
87 Header->llc[1] = WLAN_LLC_SSAP_FIELD;
88 Header->llc[2] = 0; // FIXME
89 Header->llc[3] = 0; // FIXME
95 main (int argc, char *argv[])
97 char msg_buf[WLAN_MTU];
98 struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *radiotap;
100 struct GNUNET_TRANSPORT_WLAN_MacAddress inmac;
101 struct GNUNET_TRANSPORT_WLAN_MacAddress outmac;
102 struct GNUNET_TRANSPORT_WLAN_HelperControlMessage hcm;
103 unsigned long long count;
110 int commpipe[2]; /* This holds the fd for the input & output of the pipe */
111 int macpipe[2]; /* This holds the fd for the input & output of the pipe */
116 "This program must be started with the interface and the targets and source mac as argument.\n");
118 "Usage: interface-name mac-DST mac-SRC\n"
119 "e.g. mon0 11-22-33-44-55-66 12-34-56-78-90-ab\n");
123 SSCANF (argv[2], "%x-%x-%x-%x-%x-%x", &temp[0], &temp[1], &temp[2],
124 &temp[3], &temp[4], &temp[5]))
127 "Usage: interface-name mac-DST mac-SRC\n"
128 "e.g. mon0 11-22-33-44-55-66 12-34-56-78-90-ab\n");
131 for (i = 0; i < 6; i++)
132 outmac.mac[i] = temp[i];
134 SSCANF (argv[3], "%x-%x-%x-%x-%x-%x", &temp[0], &temp[1], &temp[2],
135 &temp[3], &temp[4], &temp[5]))
138 "Usage: interface-name mac-DST mac-SRC\n"
139 "e.g. mon0 11-22-33-44-55-66 12-34-56-78-90-ab\n");
142 for (i = 0; i < 6; i++)
143 inmac.mac[i] = temp[i];
146 /* Setup communication pipeline first */
150 "Failed to create pipe: %s\n",
157 "Failed to create pipe: %s\n",
162 /* Attempt to fork and check for errors */
163 if ((pid = fork ()) == -1)
165 fprintf (stderr, "Failed to fork: %s\n",
169 memset (msg_buf, 0x42, sizeof (msg_buf));
172 /* A positive (non-negative) PID indicates the parent process */
173 if (0 != close (commpipe[0])) /* Close unused side of pipe (in side) */
175 "Failed to close fd: %s\n",
177 setvbuf (stdout, (char *) NULL, _IONBF, 0); /* Set non-buffered output on stdout */
179 if (0 != close (macpipe[1]))
181 "Failed to close fd: %s\n",
183 if (sizeof (hcm) != read (macpipe[0], &hcm, sizeof (hcm)))
185 "Failed to read hcm...\n");
187 "Got MAC %.2X:%.2X:%.2X:%.2X:%.2X:%.2X\n",
188 hcm.mac.mac[0], hcm.mac.mac[1],
189 hcm.mac.mac[2], hcm.mac.mac[3], hcm.mac.mac[4], hcm.mac.mac[5]);
190 radiotap = (struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *) msg_buf;
191 getRadiotapHeader (radiotap, WLAN_MTU);
192 getWlanHeader (&radiotap->frame, &outmac, &inmac,
198 ret = write (commpipe[1], msg_buf, WLAN_MTU);
201 fprintf (stderr, "write failed: %s\n", strerror (errno));
206 if (akt - start > 30)
208 bytes_per_s = count / (akt - start);
210 printf ("send %f kbytes/s\n", bytes_per_s);
218 /* A zero PID indicates that this is the child process */
221 if (-1 == dup2 (commpipe[0], 0)) /* Replace stdin with the in side of the pipe */
222 fprintf (stderr, "dup2 failed: %s\n", strerror (errno));
223 if (-1 == dup2 (macpipe[1], 1)) /* Replace stdout with the out side of the pipe */
224 fprintf (stderr, "dup2 failed: %s\n", strerror (errno));
225 (void) close (commpipe[1]); /* Close unused side of pipe (out side) */
226 (void) close (macpipe[0]); /* Close unused side of pipe (in 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!");