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author | Christian Grothoff <christian@grothoff.org> | 2011-12-11 15:31:47 +0000 |
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committer | Christian Grothoff <christian@grothoff.org> | 2011-12-11 15:31:47 +0000 |
commit | 2a80e31499ae4b7d2dcdbdcac7a3604c42b357f7 (patch) | |
tree | 4712323ff418b56ab05b714d6752322c9d7a9b36 /src/transport/gnunet-transport-wlan-sender.c | |
parent | f8ae79bdfd193320a1db1ff3ead82c5e19d5d4e6 (diff) | |
download | gnunet-2a80e31499ae4b7d2dcdbdcac7a3604c42b357f7.tar.gz gnunet-2a80e31499ae4b7d2dcdbdcac7a3604c42b357f7.zip |
-more minor cleanup
Diffstat (limited to 'src/transport/gnunet-transport-wlan-sender.c')
-rw-r--r-- | src/transport/gnunet-transport-wlan-sender.c | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/src/transport/gnunet-transport-wlan-sender.c b/src/transport/gnunet-transport-wlan-sender.c new file mode 100644 index 000000000..69c4963ed --- /dev/null +++ b/src/transport/gnunet-transport-wlan-sender.c | |||
@@ -0,0 +1,236 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet | ||
3 | (C) 2011 Christian Grothoff (and other contributing authors) | ||
4 | |||
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. | ||
9 | |||
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. | ||
14 | |||
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. | ||
19 | */ | ||
20 | |||
21 | /** | ||
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 | ||
25 | */ | ||
26 | #include "platform.h" | ||
27 | #include "gnunet_protocols.h" | ||
28 | #include "plugin_transport_wlan.h" | ||
29 | |||
30 | #define WLAN_MTU 1500 | ||
31 | |||
32 | /** | ||
33 | * LLC fields for better compatibility | ||
34 | */ | ||
35 | #define WLAN_LLC_DSAP_FIELD 0x1f | ||
36 | #define WLAN_LLC_SSAP_FIELD 0x1f | ||
37 | |||
38 | #define IEEE80211_ADDR_LEN 6 /* size of 802.11 address */ | ||
39 | |||
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 | ||
48 | |||
49 | |||
50 | /* | ||
51 | * generic definitions for IEEE 802.11 frames | ||
52 | */ | ||
53 | struct ieee80211_frame | ||
54 | { | ||
55 | u_int8_t i_fc[2]; | ||
56 | u_int8_t i_dur[2]; | ||
57 | u_int8_t i_addr1[IEEE80211_ADDR_LEN]; | ||
58 | u_int8_t i_addr2[IEEE80211_ADDR_LEN]; | ||
59 | u_int8_t i_addr3[IEEE80211_ADDR_LEN]; | ||
60 | u_int8_t i_seq[2]; | ||
61 | u_int8_t llc[4]; | ||
62 | } GNUNET_PACKED; | ||
63 | |||
64 | |||
65 | /** | ||
66 | * function to fill the radiotap header | ||
67 | * @param header pointer to the radiotap header | ||
68 | * @return GNUNET_YES at success | ||
69 | */ | ||
70 | static int | ||
71 | getRadiotapHeader (struct Radiotap_Send *header) | ||
72 | { | ||
73 | header->rate = 255; | ||
74 | header->tx_power = 0; | ||
75 | header->antenna = 0; | ||
76 | |||
77 | return GNUNET_YES; | ||
78 | } | ||
79 | |||
80 | /** | ||
81 | * function to generate the wlan hardware header for one packet | ||
82 | * @param Header address to write the header to | ||
83 | * @param to_mac_addr pointer to the address of the recipient | ||
84 | * @param mac pointer to the mac address to send from (normally overwritten over by helper) | ||
85 | * @param size size of the whole packet, needed to calculate the time to send the packet | ||
86 | * @return GNUNET_YES if there was no error | ||
87 | */ | ||
88 | static int | ||
89 | getWlanHeader (struct ieee80211_frame *Header, const char *to_mac_addr, | ||
90 | const char *mac, unsigned int size) | ||
91 | { | ||
92 | uint16_t *tmp16; | ||
93 | const int rate = 11000000; | ||
94 | |||
95 | Header->i_fc[0] = IEEE80211_FC0_TYPE_DATA; | ||
96 | Header->i_fc[1] = 0x00; | ||
97 | memcpy (&Header->i_addr3, &mac_bssid_gnunet, sizeof (mac_bssid_gnunet)); | ||
98 | memcpy (&Header->i_addr2, mac, sizeof (mac_bssid_gnunet)); | ||
99 | memcpy (&Header->i_addr1, to_mac_addr, sizeof (mac_bssid_gnunet)); | ||
100 | |||
101 | tmp16 = (uint16_t *) Header->i_dur; | ||
102 | *tmp16 = (uint16_t) GNUNET_htole16 ((size * 1000000) / rate + 290); | ||
103 | Header->llc[0] = WLAN_LLC_DSAP_FIELD; | ||
104 | Header->llc[1] = WLAN_LLC_SSAP_FIELD; | ||
105 | |||
106 | return GNUNET_YES; | ||
107 | } | ||
108 | |||
109 | |||
110 | int | ||
111 | main (int argc, char *argv[]) | ||
112 | { | ||
113 | char msg_buf[WLAN_MTU]; | ||
114 | struct GNUNET_MessageHeader *msg; | ||
115 | struct ieee80211_frame *wlan_header; | ||
116 | struct Radiotap_Send *radiotap; | ||
117 | |||
118 | unsigned int temp[6]; | ||
119 | char inmac[6]; | ||
120 | char outmac[6]; | ||
121 | int pos; | ||
122 | long long count; | ||
123 | double bytes_per_s; | ||
124 | time_t start; | ||
125 | time_t akt; | ||
126 | int i; | ||
127 | |||
128 | if (4 != argc) | ||
129 | { | ||
130 | fprintf (stderr, | ||
131 | "This program must be started with the interface and the targets and source mac as argument.\n"); | ||
132 | fprintf (stderr, | ||
133 | "Usage: interface-name mac-target mac-source\n" | ||
134 | "e.g. mon0 11-22-33-44-55-66 12-34-56-78-90-ab\n"); | ||
135 | return 1; | ||
136 | } | ||
137 | if (6 != | ||
138 | sscanf (argv[3], "%x-%x-%x-%x-%x-%x", &temp[0], &temp[1], &temp[2], | ||
139 | &temp[3], &temp[4], &temp[5])) | ||
140 | { | ||
141 | fprintf (stderr, | ||
142 | "Usage: interface-name mac-target mac-source\n" | ||
143 | "e.g. mon0 11-22-33-44-55-66 12-34-56-78-90-ab\n"); | ||
144 | return 1; | ||
145 | } | ||
146 | if (6 != | ||
147 | sscanf (argv[2], "%x-%x-%x-%x-%x-%x", &temp[0], &temp[1], &temp[2], | ||
148 | &temp[3], &temp[4], &temp[5])) | ||
149 | { | ||
150 | fprintf (stderr, | ||
151 | "Usage: interface-name mac-target mac-source\n" | ||
152 | "e.g. mon0 11-22-33-44-55-66 12-34-56-78-90-ab\n"); | ||
153 | return 1; | ||
154 | } | ||
155 | for (i = 0; i < 6; i++) | ||
156 | inmac[i] = temp[i]; | ||
157 | for (i = 0; i < 6; i++) | ||
158 | outmac[i] = temp[i]; | ||
159 | |||
160 | pid_t pid; | ||
161 | int commpipe[2]; /* This holds the fd for the input & output of the pipe */ | ||
162 | |||
163 | /* Setup communication pipeline first */ | ||
164 | if (pipe (commpipe)) | ||
165 | { | ||
166 | fprintf (stderr, | ||
167 | "Failed to create pipe: %s\n", | ||
168 | STRERROR (errno)); | ||
169 | exit (1); | ||
170 | } | ||
171 | |||
172 | /* Attempt to fork and check for errors */ | ||
173 | if ((pid = fork ()) == -1) | ||
174 | { | ||
175 | fprintf (stderr, "Failed to fork: %s\n", | ||
176 | STRERROR (errno)); | ||
177 | exit (1); | ||
178 | } | ||
179 | |||
180 | if (pid) | ||
181 | { | ||
182 | /* A positive (non-negative) PID indicates the parent process */ | ||
183 | close (commpipe[0]); /* Close unused side of pipe (in side) */ | ||
184 | setvbuf (stdout, (char *) NULL, _IONBF, 0); /* Set non-buffered output on stdout */ | ||
185 | |||
186 | |||
187 | msg = (struct GNUNET_MessageHeader *) msg_buf; | ||
188 | msg->type = htons (GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA); | ||
189 | msg->size = htons (WLAN_MTU); | ||
190 | radiotap = (struct Radiotap_Send *) &msg[1]; | ||
191 | wlan_header = (struct ieee80211_frame *) &radiotap[1]; | ||
192 | pos = 0; | ||
193 | |||
194 | getRadiotapHeader (radiotap); | ||
195 | getWlanHeader (wlan_header, outmac, inmac, | ||
196 | WLAN_MTU - sizeof (struct GNUNET_MessageHeader)); | ||
197 | |||
198 | start = time (NULL); | ||
199 | count = 0; | ||
200 | while (1) | ||
201 | { | ||
202 | pos += write (commpipe[1], msg, WLAN_MTU - pos); | ||
203 | if (pos % WLAN_MTU == 0) | ||
204 | { | ||
205 | pos = 0; | ||
206 | count++; | ||
207 | |||
208 | if (count % 1000 == 0) | ||
209 | { | ||
210 | akt = time (NULL); | ||
211 | bytes_per_s = count * WLAN_MTU / (akt - start); | ||
212 | bytes_per_s /= 1024; | ||
213 | printf ("send %f kbytes/s\n", bytes_per_s); | ||
214 | } | ||
215 | } | ||
216 | |||
217 | } | ||
218 | } | ||
219 | else | ||
220 | { | ||
221 | /* A zero PID indicates that this is the child process */ | ||
222 | (void) close (0); | ||
223 | if (-1 == dup2 (commpipe[0], 0)) /* Replace stdin with the in 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 | /* Replace the child fork with a new process */ | ||
227 | if (execl | ||
228 | ("gnunet-transport-wlan-helper", "gnunet-transport-wlan-helper", | ||
229 | argv[1], NULL) == -1) | ||
230 | { | ||
231 | fprintf (stderr, "Could not start gnunet-transport-wlan-helper!"); | ||
232 | _exit (1); | ||
233 | } | ||
234 | } | ||
235 | return 0; | ||
236 | } | ||