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
|
/* MLpcap: pcap bindings for OCaml.
* Copyright (C) 2003-2004 Jonathan Heusser <jonny@drugphish.ch>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <stddef.h>
#include <string.h>
#include <caml/mlvalues.h>
#include <caml/memory.h>
#include <caml/alloc.h>
#include <caml/fail.h>
#include <caml/callback.h>
#ifdef Custom_tag
#include <caml/custom.h>
#include <caml/bigarray.h>
#endif
#include <caml/camlidlruntime.h>
#include <callback.h>
#include <pcap.h>
#include "utils.h"
void
_pcap_callback (void *cback, va_alist alist)
{
struct pcap_pkthdr *pkthdr;
// data, packet
char *p1, *p2;
value hdr, tval;
va_start_void (alist);
p1 = va_arg_ptr (alist, char *);
pkthdr = va_arg_ptr (alist, struct pcap_pkthdr *);
// ts.tv_sec, ts.tv_usec from pcap_pkthdr
tval = alloc_small (2, 0);
Field (tval, 0) = Val_int (pkthdr->ts.tv_sec);
Field (tval, 1) = Val_int (pkthdr->ts.tv_usec);
// caplen, len from pcap_pkthdr
hdr = alloc_small (3, 0);
Field (hdr, 0) = tval;
Field (hdr, 1) = Val_int (pkthdr->caplen);
Field (hdr, 2) = Val_int (pkthdr->len);
// packet pointer
p2 = va_arg_ptr (alist, char *);
callback3 (*(value *) cback, Val_bp (p1), hdr, Val_bp (p2));
va_return_void (alist);
}
/* used for pcap_findalldevs() */
value
build_pcap_if_array (pcap_if * _c2)
{
int cnt = 0;
value _v1;
value _v3[3];
value _vres;
pcap_if *dummy;
_v3[0] = _v3[1] = _v3[2] = 0;
/* count the entries in the linked list for latter camlidl_alloc() */
dummy = _c2;
while ((*dummy).next)
{
dummy = (*dummy).next;
cnt++;
}
_vres = camlidl_alloc (cnt, 0);
cnt = 0;
Begin_roots_block (_v3, 3);
while ((*_c2).next)
{
_v3[0] = copy_string ((*_c2).name);
if ((*_c2).description == NULL || (*_c2).description == "") {
_v3[1] = copy_string("No description");
} else _v3[1] = copy_string((*_c2).description);
_v3[2] = Val_int((*_c2).flags);
_v1 = camlidl_alloc_small(3, 0);
Field(_v1, 0) = _v3[0];
Field(_v1, 1) = _v3[1];
Field(_v1, 2) = _v3[2];
Field(_vres, cnt) = _v1;
cnt++;
_c2 = (*_c2).next;
}
End_roots();
return _vres;
}
#ifdef HAVE_PCAP08
/* used for pcap_list_datalinks() */
value
build_pcap_int_array(int *_c2, int length)
{
int i;
value _v1;
value _vret;
value _vres;
_vret = 0;
/* allocate array with length */
_vres = camlidl_alloc(length, 0);
Begin_roots1(_vret);
for(i=0; i < length; i++) {
/* actual field value */
_vret = Val_int(_c2[i]);
Field(_vres, i) = _vret;
}
End_roots();
return _vres;
}
#endif
value camlidl_pcap_pcap_findalldevs(value _unit)
{
pcap_if **alldevsp;
int _res;
pcap_if *_c1;
value _vres;
alldevsp = &_c1;
{
char errbuf[256];
_res = pcap_findalldevs(alldevsp, errbuf);
if(_res == -1)
failwith(errbuf);
}
_vres = build_pcap_if_array(&**alldevsp);
return _vres;
}
#ifdef HAVE_PCAP08
value camlidl_pcap_pcap_list_datalinks(value _v_p)
{
int *dlt_buf,ret;
pcap_handle p;
value _v1;
value _vresult;
value _vres[2] = { 0, 0, };
/* initialize pcap_handle p */
struct camlidl_ctx_struct _ctxs = { CAMLIDL_TRANSIENT, NULL };
camlidl_ctx _ctx = &_ctxs;
camlidl_ml2c_pcap_pcap_handle(_v_p, &p, _ctx);
/* call the actual function and build the int array */
ret = pcap_list_datalinks(p, &dlt_buf);
_v1 = build_pcap_int_array(dlt_buf, ret);
/* build the return values: int * int array */
Begin_roots_block(_vres, 2)
_vres[0] = Val_int(ret);
_vres[1] = _v1;
_vresult = camlidl_alloc_small(2, 0);
Field(_vresult, 0) = _vres[0];
Field(_vresult, 1) = _vres[1];
End_roots()
return _vresult;
}
#endif
|
