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
|
/* horst - Highly Optimized Radio Scanning Tool
*
* Copyright (C) 2005-2016 Bruno Randolf (br1@einfach.org)
* Copyright (C) 2007 Sven-Ola Tuecke
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <stdio.h>
#include <string.h>
#include <pcap.h>
#include <err.h>
#include "capture.h"
#include "util.h"
void __attribute__ ((format (printf, 1, 2)))
printlog(const char *fmt, ...);
#define PCAP_TIMEOUT 200
static unsigned char* pcap_buffer;
static size_t pcap_bufsize;
static pcap_t *pcap_fp = NULL;
static void handler(u_char *user, const struct pcap_pkthdr *h, const u_char *bytes)
{
*((int *)user) = h->len;
if (pcap_bufsize < h->len) {
printlog("ERROR: Buffer(%d) too small for %d bytes",
(int)pcap_bufsize, h->len);
*((int *)user) = pcap_bufsize;
}
memmove(pcap_buffer, bytes, *((int *)user));
}
int open_packet_socket(char* devname, __attribute__((unused)) int recv_buffer_size)
{
char error[PCAP_ERRBUF_SIZE];
int ret;
pcap_fp = pcap_create(devname, error);
if (pcap_fp == NULL) {
fprintf(stderr, "Couldn't create pcap: %s\n", error);
return -1;
}
pcap_set_promisc(pcap_fp, 1);
#if defined(__APPLE__)
if (pcap_can_set_rfmon(pcap_fp))
pcap_set_rfmon(pcap_fp, 1);
else
err(1, "Couldn't activate monitor mode");
#endif
ret = pcap_activate(pcap_fp);
if (ret < 0) {
fprintf(stderr, "Can't activate pcap: %d\n", ret);
return -1;
}
return pcap_fileno(pcap_fp);
}
int device_get_hwinfo(__attribute__((unused)) int fd,
__attribute__((unused)) char* ifname,
__attribute__((unused)) unsigned char* mac)
{
if (pcap_fp != NULL) {
switch (pcap_datalink(pcap_fp)) {
case DLT_IEEE802_11_RADIO:
return 803;
case DLT_PRISM_HEADER:
return 802;
default:
return 801;
}
}
/* TODO: mac address not implemented */
return -1;
}
int recv_packet(__attribute__((unused)) int fd,
unsigned char* buffer, size_t bufsize)
{
int ret = 0;
pcap_buffer = buffer;
pcap_bufsize = bufsize;
if (0 == pcap_dispatch(pcap_fp, 1, handler, (u_char *)&ret))
return -1;
return ret;
}
void close_packet_socket(__attribute__((unused)) int fd)
{
if (pcap_fp != NULL)
pcap_close(pcap_fp);
}
|
