1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
/*
* hwsim_test - Data connectivity test for mac80211_hwsim
* Copyright (c) 2009, Atheros Communications
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <netpacket/packet.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <arpa/inet.h>
#define MAC2STR(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]
#define MACSTR "%02x:%02x:%02x:%02x:%02x:%02x"
#define HWSIM_ETHERTYPE ETHERTYPE_IP
#define HWSIM_PACKETLEN 1500
static unsigned char addr1[ETH_ALEN], addr2[ETH_ALEN], bcast[ETH_ALEN];
static void tx(int s, const char *ifname, int ifindex,
const unsigned char *src, const unsigned char *dst)
{
char buf[HWSIM_PACKETLEN], *pos;
struct ether_header *eth;
int i;
printf("TX: %s(ifindex=%d) " MACSTR " -> " MACSTR "\n",
ifname, ifindex, MAC2STR(src), MAC2STR(dst));
eth = (struct ether_header *) buf;
memcpy(eth->ether_dhost, dst, ETH_ALEN);
memcpy(eth->ether_shost, src, ETH_ALEN);
eth->ether_type = htons(HWSIM_ETHERTYPE);
pos = (char *) (eth + 1);
for (i = 0; i < sizeof(buf) - sizeof(*eth); i++)
*pos++ = i;
if (send(s, buf, sizeof(buf), 0) < 0)
perror("send");
}
struct rx_result {
int rx_unicast1:1;
int rx_broadcast1:1;
int rx_unicast2:1;
int rx_broadcast2:1;
};
static void rx(int s, int iface, const char *ifname, int ifindex,
struct rx_result *res)
{
char buf[HWSIM_PACKETLEN + 1], *pos;
struct ether_header *eth;
int len, i;
len = recv(s, buf, sizeof(buf), 0);
if (len < 0) {
perror("recv");
return;
}
eth = (struct ether_header *) buf;
printf("RX: %s(ifindex=%d) " MACSTR " -> " MACSTR " (len=%d)\n",
ifname, ifindex,
MAC2STR(eth->ether_shost), MAC2STR(eth->ether_dhost), len);
if (len != HWSIM_PACKETLEN) {
printf("Ignore frame with unexpected RX length\n");
return;
}
pos = (char *) (eth + 1);
for (i = 0; i < sizeof(buf) - 1 - sizeof(*eth); i++) {
if ((unsigned char) *pos != (unsigned char) i) {
printf("Ignore frame with unexpected contents\n");
printf("i=%d received=0x%x expected=0x%x\n",
i, (unsigned char) *pos, (unsigned char) i);
return;
}
pos++;
}
if (iface == 1 &&
memcmp(eth->ether_dhost, addr1, ETH_ALEN) == 0 &&
memcmp(eth->ether_shost, addr2, ETH_ALEN) == 0)
res->rx_unicast1 = 1;
else if (iface == 1 &&
memcmp(eth->ether_dhost, bcast, ETH_ALEN) == 0 &&
memcmp(eth->ether_shost, addr2, ETH_ALEN) == 0)
res->rx_broadcast1 = 1;
else if (iface == 2 &&
memcmp(eth->ether_dhost, addr2, ETH_ALEN) == 0 &&
memcmp(eth->ether_shost, addr1, ETH_ALEN) == 0)
res->rx_unicast2 = 1;
else if (iface == 2 &&
memcmp(eth->ether_dhost, bcast, ETH_ALEN) == 0 &&
memcmp(eth->ether_shost, addr1, ETH_ALEN) == 0)
res->rx_broadcast2 = 1;
}
int main(int argc, char *argv[])
{
int s1 = -1, s2 = -1, ret = -1;
struct ifreq ifr;
int ifindex1, ifindex2;
struct sockaddr_ll ll;
fd_set rfds;
struct timeval tv;
struct rx_result res;
if (argc != 3) {
fprintf(stderr, "usage: hwsim_test <ifname1> <ifname2>\n");
return -1;
}
memset(bcast, 0xff, ETH_ALEN);
s1 = socket(PF_PACKET, SOCK_RAW, htons(HWSIM_ETHERTYPE));
if (s1 < 0) {
perror("socket");
goto fail;
}
s2 = socket(PF_PACKET, SOCK_RAW, htons(HWSIM_ETHERTYPE));
if (s2 < 0) {
perror("socket");
goto fail;
}
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, argv[1], sizeof(ifr.ifr_name));
if (ioctl(s1, SIOCGIFINDEX, &ifr) < 0) {
perror("ioctl[SIOCGIFINDEX]");
goto fail;
}
ifindex1 = ifr.ifr_ifindex;
if (ioctl(s1, SIOCGIFHWADDR, &ifr) < 0) {
perror("ioctl[SIOCGIFHWADDR]");
goto fail;
}
memcpy(addr1, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, argv[2], sizeof(ifr.ifr_name));
if (ioctl(s2, SIOCGIFINDEX, &ifr) < 0) {
perror("ioctl[SIOCGIFINDEX]");
goto fail;
}
ifindex2 = ifr.ifr_ifindex;
if (ioctl(s2, SIOCGIFHWADDR, &ifr) < 0) {
perror("ioctl[SIOCGIFHWADDR]");
goto fail;
}
memcpy(addr2, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
memset(&ll, 0, sizeof(ll));
ll.sll_family = PF_PACKET;
ll.sll_ifindex = ifindex1;
ll.sll_protocol = htons(HWSIM_ETHERTYPE);
if (bind(s1, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
perror("bind");
goto fail;
}
memset(&ll, 0, sizeof(ll));
ll.sll_family = PF_PACKET;
ll.sll_ifindex = ifindex2;
ll.sll_protocol = htons(HWSIM_ETHERTYPE);
if (bind(s2, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
perror("bind");
goto fail;
}
tx(s1, argv[1], ifindex1, addr1, addr2);
tx(s1, argv[1], ifindex1, addr1, bcast);
tx(s2, argv[2], ifindex2, addr2, addr1);
tx(s2, argv[2], ifindex2, addr2, bcast);
tv.tv_sec = 1;
tv.tv_usec = 0;
memset(&res, 0, sizeof(res));
for (;;) {
int r;
FD_ZERO(&rfds);
FD_SET(s1, &rfds);
FD_SET(s2, &rfds);
r = select(s2 + 1, &rfds, NULL, NULL, &tv);
if (r < 0) {
perror("select");
goto fail;
}
if (r == 0)
break; /* timeout */
if (FD_ISSET(s1, &rfds))
rx(s1, 1, argv[1], ifindex1, &res);
if (FD_ISSET(s2, &rfds))
rx(s2, 2, argv[2], ifindex2, &res);
if (res.rx_unicast1 && res.rx_broadcast1 &&
res.rx_unicast2 && res.rx_broadcast2) {
ret = 0;
break;
}
}
if (ret) {
printf("Did not receive all expected frames:\n"
"rx_unicast1=%d rx_broadcast1=%d "
"rx_unicast2=%d rx_broadcast2=%d\n",
res.rx_unicast1, res.rx_broadcast1,
res.rx_unicast2, res.rx_broadcast2);
} else {
printf("Both unicast and broadcast working in both "
"directions\n");
}
fail:
close(s1);
close(s2);
return ret;
}
|
