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
245
246
247
248
249
250
251
252
253
254
255
256
|
#include <sys/types.h>
#include <netinet/in.h>
#include <stdio.h>
#include <string.h>
/* RADIUS support for tcpdump, Thomas Ptacek <tqbf@enteract.com> */
#include "interface.h"
#include "radius.h"
static void r_print_att(int code, int len, const u_char *val);
static void r_print_int(int code, int len, const u_char *val);
static void r_print_address(int code, int len, const u_char *val);
static void r_print_string(int code, int len, const u_char *val);
static void r_print_hex(int code, int len, const u_char *val);
/* --------------------------------------------------------------- */
struct radius_ctable {
int code;
char *name;
};
/* map opcodes to strings */
#define DEFINED_OPCODES 11
static struct radius_ctable radius_codes[] = {
{ -1, NULL },
{ RADIUS_CODE_ACCESS_REQUEST, "Axs?" },
{ RADIUS_CODE_ACCESS_ACCEPT, "Axs+" },
{ RADIUS_CODE_ACCESS_REJECT, "Axs-" },
{ RADIUS_CODE_ACCOUNT_REQUEST, "Act?" },
{ RADIUS_CODE_ACCOUNT_RESPONSE, "Act+" },
{ RADIUS_CODE_ACCOUNT_STATUS, "ActSt" },
{ RADIUS_CODE_PASSCHG_REQUEST, "Pchg?" },
{ RADIUS_CODE_PASSCHG_ACCEPT, "Pchg+" },
{ RADIUS_CODE_PASSCHG_REJECT, "Pchg-" },
{ RADIUS_CODE_ACCOUNT_MESSAGE, "ActMg" },
{ RADIUS_CODE_ACCESS_CHALLENGE, "Axs!" },
{ -1, NULL }
};
/* --------------------------------------------------------------- */
#define MAX_VALUES 20
struct radius_atable {
int code;
int encoding;
char *name;
char *values[MAX_VALUES];
};
/* map attributes to strings */
/* the right way to do this is probably to read these values out
* of the actual RADIUS dictionary; this would require the machine
* running tcpdump to have that file installed, and it's not my
* program, so I'm not going to introduce new dependancies. Oh well.
*/
static struct radius_atable radius_atts[] = {
{ RADIUS_ATT_USER_NAME, RD_STRING, "Name", NULL },
{ RADIUS_ATT_PASSWORD, RD_HEX, "Pass", NULL },
{ RADIUS_ATT_CHAP_PASS, RD_HEX, "CPass", NULL },
{ RADIUS_ATT_NAS_IP, RD_ADDRESS, "NAS-IP", NULL },
{ RADIUS_ATT_NAS_PORT, RD_INT, "NAS-Pt", NULL },
{ RADIUS_ATT_USER_SERVICE, RD_INT, "USvc",
{ "", "Login", "Framed", "DB-Lgn", "DB-Frm", "Out", "Shell", NULL } },
{ RADIUS_ATT_PROTOCOL, RD_INT, "FProt",
{ "", "PPP", "SLIP", NULL } },
{ RADIUS_ATT_FRAMED_ADDRESS, RD_ADDRESS, "F-IP", NULL },
{ RADIUS_ATT_NETMASK, RD_ADDRESS, "F-Msk", NULL },
{ RADIUS_ATT_ROUTING, RD_INT, "F-Rtg", NULL },
{ RADIUS_ATT_FILTER, RD_STRING, "FltID", NULL },
{ RADIUS_ATT_MTU, RD_INT, "F-MTU", NULL },
{ RADIUS_ATT_COMPRESSION, RD_INT, "F-Comp", NULL },
{ RADIUS_ATT_LOGIN_HOST, RD_ADDRESS, "L-Hst", NULL },
{ RADIUS_ATT_LOGIN_SERVICE, RD_INT, "L-Svc",
{ "", "Telnt", "Rlog", "Clear", "PortM", NULL } },
{ RADIUS_ATT_LOGIN_TCP_PORT, RD_INT, "L-Pt", NULL },
{ RADIUS_ATT_OLD_PASSWORD, RD_HEX, "OPass", NULL },
{ RADIUS_ATT_PORT_MESSAGE, RD_STRING, "PMsg", NULL },
{ RADIUS_ATT_DIALBACK_NO, RD_STRING, "DB#", NULL },
{ RADIUS_ATT_DIALBACK_NAME, RD_STRING, "DBNm", NULL },
{ RADIUS_ATT_EXPIRATION, RD_DATE, "PExp", NULL },
{ RADIUS_ATT_FRAMED_ROUTE, RD_STRING, "F-Rt", NULL },
{ RADIUS_ATT_FRAMED_IPX, RD_ADDRESS, "F-IPX", NULL },
{ RADIUS_ATT_CHALLENGE_STATE, RD_STRING, "CState", NULL },
{ RADIUS_ATT_CLASS, RD_STRING, "Class", NULL },
{ RADIUS_ATT_VENDOR_SPECIFIC, RD_HEX, "Vendor", NULL },
{ RADIUS_ATT_SESSION_TIMEOUT, RD_INT, "S-TO", NULL },
{ RADIUS_ATT_IDLE_TIMEOUT, RD_INT, "I-TO", NULL },
{ RADIUS_ATT_TERMINATE_ACTION, RD_INT, "TermAct", NULL },
{ RADIUS_ATT_CALLED_ID, RD_STRING, "Callee", NULL },
{ RADIUS_ATT_CALLER_ID, RD_STRING, "Caller", NULL },
{ RADIUS_ATT_STATUS_TYPE, RD_INT, "Stat",
{ "", "Start", "Stop", NULL } },
{ -1, -1, NULL, NULL }
};
typedef void (*aselector)(int code, int len, const u_char *data);
aselector atselector[] = {
r_print_hex,
r_print_int,
r_print_int,
r_print_address,
r_print_string,
r_print_hex
};
static void r_print_att(int code, int len, const u_char *data) {
struct radius_atable *atp;
int i;
for(atp = radius_atts; atp->code != -1; atp++)
if(atp->code == code)
break;
if(atp->code == -1) {
if(vflag > 1) {
fprintf(stdout, " %d =", code);
atselector[RD_HEX](code, len, data);
} else
fprintf(stdout, " %d", code);
return;
}
fprintf(stdout, " %s =", atp->name);
if(atp->encoding == RD_INT && *atp->values) {
int k = ntohl((*(int *)data));
for(i = 0; atp->values[i] != NULL; i++)
/* SHOOT ME */ ;
if(k < i) {
fprintf(stdout, " %s",
atp->values[k]);
return;
}
}
atselector[atp->encoding](code, len, data);
}
static void r_print_int(int code, int len, const u_char *data) {
if(len < 4) {
fputs(" ?", stdout);
return;
}
fprintf(stdout, " %d", ntohl((*(int *)data)));
}
static void r_print_address(int code, int len, const u_char *data) {
if(len < 4) {
fputs(" ?", stdout);
return;
}
fprintf(stdout, " %s", inet_ntoa((*(struct in_addr *)data)));
}
static void r_print_string(int code, int len, const u_char *data) {
char string[128];
if(!len) {
fputs(" ?", stdout);
return;
}
if(len > 127)
len = 127;
memset(string, 0, 128);
memcpy(string, data, len);
fprintf(stdout, " %s", string);
}
static void r_print_hex(int code, int len, const u_char *data) {
int i;
/* excuse me */
fputs(" [", stdout);
for(i = 0; i < len; i++)
fprintf(stdout, "%x", data[i]);
fputc(']', stdout);
}
void radius_print(register const u_char *data, u_int len) {
const struct radius_header *rhp;
const u_char *pp;
int i, l, ac, al;
if(len < sizeof(struct radius_header)) {
fputs(" [|radius]", stdout);
return;
}
rhp = (struct radius_header *) data;
if(rhp->code > DEFINED_OPCODES ||
rhp->code < 1)
fprintf(stdout, " Code:%d id:%x [%d]",
rhp->code, rhp->id, ntohs(rhp->len));
else
fprintf(stdout, " %s id:%x [%d]",
radius_codes[rhp->code].name,
rhp->id, ntohs(rhp->len));
if(ntohs(rhp->len) > len) {
fputs(" [|radius]", stdout);
return;
}
l = len - RADFIXEDSZ;
if(!l)
return;
else
pp = data + RADFIXEDSZ;
while(l) {
if(!i) fputc(',', stdout); i = 0;
ac = *pp++;
al = *pp++;
if(al > l || al < 2) {
fputs(" [|radius]", stdout);
return;
}
al -= 2;
r_print_att(ac, al, pp);
pp += al; l -= al + 2;
}
}
|
