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
|
/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
* (BSD License, from tdelibs/doc/common/bsd-license.html)
*/
/* debug print routines */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <syslog.h>
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <config.h>
#ifdef HAVE_PATHS_H
#include <paths.h>
#endif
#include <errno.h>
#include "prot_talkd.h"
#include "proto.h"
#ifndef _PATH_VAR_LOG
#define _PATH_VAR_LOG "/var/log/"
#endif
#define NTYPES 4
static const char *types[NTYPES] = {
"LEAVE_INVITE",
"LOOK_UP",
"DELETE",
"ANNOUNCE"
};
#define NANSWERS 9
static const char *answers[NANSWERS] = {
"SUCCESS",
"NOT_HERE",
"FAILED",
"MACHINE_UNKNOWN",
"PERMISSION_DENIED",
"UNKNOWN_REQUEST",
"BADVERSION",
"BADADDR",
"BADCTLADDR"
};
static int logging, badpackets;
static int logfd, packfd;
void
set_debug(int l, int b)
{
const char *file;
logging = l;
badpackets = b;
if (logging) {
file = _PATH_VAR_LOG "talkd.log";
logfd = open(file, O_WRONLY|O_APPEND);
if (logfd<0) {
syslog(LOG_WARNING, "%s: %s", file, strerror(errno));
logging = 0;
}
}
if (badpackets) {
file = _PATH_VAR_LOG "talkd.packets";
packfd = open(file, O_WRONLY|O_APPEND);
if (packfd<0) {
syslog(LOG_WARNING, "%s: %s", file, strerror(errno));
badpackets = 0;
}
}
}
/****************** ktalkd addition ************/
/* print_addr is a debug print routine for sockaddr_in structures.
* Call with a structure in network byte order.
* @param cp a string to identify the log output
* @param addr the address to read
* This code is obviously NOT IPv6 ready :)
*/
static void print_addr(const char *cp, struct sockaddr_in * addr)
{
int a0,a1,a2,a3;
unsigned int s_add = addr->sin_addr.s_addr;
char buf[1024];
a0 = s_add % 256L;
s_add /= 256L;
a1 = s_add % 256L;
s_add /= 256L;
a2 = s_add % 256L;
s_add /= 256L;
a3 = s_add % 256L;
snprintf(buf, sizeof(buf), "%s: addr = %d.%d.%d.%d port = %o, family = %o",
cp, a0, a1, a2, a3, ntohs(addr->sin_port), ntohs(addr->sin_family));
write(logfd, buf, strlen(buf));
}
/**********************************************/
static const char *
print_type(int type)
{
static char rv[80];
if (type > NTYPES) {
snprintf(rv, sizeof(rv), "type %d", type);
return rv;
}
return types[type];
}
static const char *
print_answer(int answer)
{
static char rv[80];
if (answer > NANSWERS) {
snprintf(rv, sizeof(rv), "answer %d", answer);
return rv;
}
return answers[answer];
}
void
print_request(const char *cp, const CTL_MSG *mp)
{
char lu[NAME_SIZE+1], ru[NAME_SIZE+1], tt[TTY_SIZE+1];
char buf[1024];
const char *tp;
if (!logging) return;
tp = print_type(mp->type);
strncpy(lu, mp->l_name, sizeof(lu));
strncpy(ru, mp->r_name, sizeof(ru));
strncpy(tt, mp->r_tty, sizeof(tt));
lu[sizeof(lu)-1]=0;
ru[sizeof(ru)-1]=0;
tt[sizeof(tt)-1]=0;
snprintf(buf, sizeof(buf),
"%s: %s: id %u, l_user %s, r_user %s, r_tty %s\n",
cp, tp, mp->id_num, lu, ru, tt);
write(logfd, buf, strlen(buf));
print_addr(" addr", (struct sockaddr_in *)&mp->addr);
print_addr(" ctl_addr", (struct sockaddr_in *)&mp->ctl_addr);
}
void
print_response(const char *cp, const CTL_RESPONSE *rp)
{
char buf[1024];
const char *tp, *ap;
if (!logging) return;
tp = print_type(rp->type);
ap = print_answer(rp->answer);
snprintf(buf, sizeof(buf),
"%s: %s <-- %s, id %d\n",
cp, tp, ap, ntohl(rp->id_num));
write(logfd, buf, strlen(buf));
if ((rp->type == LOOK_UP) && (rp->answer == SUCCESS))
print_addr(" resp addr", (struct sockaddr_in *)&rp->addr);
}
void
ktalk_debug(const char *format, ...)
{
char buf[1024];
va_list ap;
if (!logging) return;
va_start(ap, format);
vsnprintf(buf, sizeof(buf), format, ap);
va_end(ap);
write(logfd, buf, strlen(buf));
}
void
print_broken_packet(const char *pack, size_t len, struct sockaddr_in *from)
{
size_t i;
char tmp[4], buf[128];
if (!badpackets) return;
snprintf(buf, sizeof(buf), "From: %s [%u]",
inet_ntoa(from->sin_addr), from->sin_addr.s_addr);
write(packfd, buf, strlen(buf));
for (i=0; i<len; i++) {
if (i%24 == 0) write(packfd, "\n ", 5);
snprintf(tmp, sizeof(tmp), "%02x ", (unsigned char)pack[i]);
write(packfd, tmp, strlen(tmp));
}
write(packfd, "\n", 1);
}
|