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
|
/* $OpenBSD: ipft_td.c,v 1.7 1997/06/23 16:44:50 kstailey Exp $ */
/*
* (C)opyright 1993,1994,1995 by Darren Reed.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
* to the original author and the contributors.
*/
/*
tcpdump -n
00:05:47.816843 128.231.76.76.3291 > 224.2.252.231.36573: udp 36 (encap)
tcpdump -nq
00:33:48.410771 192.73.213.11.1463 > 224.2.248.153.59360: udp 31 (encap)
tcpdump -nqt
128.250.133.13.23 > 128.250.20.20.2419: tcp 27
tcpdump -nqtt
123456789.1234567 128.250.133.13.23 > 128.250.20.20.2419: tcp 27
tcpdump -nqte
8:0:20:f:65:f7 0:0:c:1:8a:c5 81: 128.250.133.13.23 > 128.250.20.20.2419: tcp 27
*/
#include <stdio.h>
#include <string.h>
#if !defined(__SVR4) && !defined(__GNUC__)
#include <strings.h>
#endif
#include <sys/types.h>
#include <sys/param.h>
#include <stdlib.h>
#include <unistd.h>
#include <stddef.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netinet/in_systm.h>
#include <netinet/ip_var.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <netinet/ip_icmp.h>
#include <netinet/tcpip.h>
#include <net/if.h>
#include <netdb.h>
#include "ipf.h"
#include "ipt.h"
#if !defined(lint) && defined(LIBC_SCCS)
static char sccsid[] = "@(#)ipft_td.c 1.8 2/4/96 (C)1995 Darren Reed";
static char rcsid[] = "$DRId: ipft_td.c,v 2.0.1.1 1997/01/09 15:14:44 darrenr Exp $";
#endif
static int tcpd_open(), tcpd_close(), tcpd_readip();
struct ipread tcpd = { tcpd_open, tcpd_close, tcpd_readip };
static FILE *tfp = NULL;
static int tfd = -1;
static int tcpd_open(fname)
char *fname;
{
if (tfd != -1)
return tfd;
if (!strcmp(fname, "-")) {
tfd = 0;
tfp = stdin;
} else {
tfd = open(fname, O_RDONLY);
tfp = fdopen(tfd, "r");
}
return tfd;
}
static int tcpd_close()
{
(void) fclose(tfp);
return close(tfd);
}
static int count_dots(str)
char *str;
{
int i = 0;
while (*str)
if (*str++ == '.')
i++;
return i;
}
static int tcpd_readip(buf, cnt, ifn, dir)
char *buf, **ifn;
int cnt, *dir;
{
struct tcpiphdr pkt;
struct ip *ip = (struct ip *)&pkt;
struct protoent *p;
char src[32], dst[32], misc[256], time[32], link1[32], link2[32];
char lbuf[160], *s;
int n, dots, slen, extra = 0;
if (!fgets(lbuf, sizeof(lbuf) - 1, tfp))
return 0;
if ((s = strchr(lbuf, '\n')))
*s = '\0';
lbuf[sizeof(lbuf)-1] = '\0';
bzero(&pkt, sizeof(pkt));
if ((n = sscanf(lbuf, "%s > %s: %s", src, dst, misc)) != 3)
if ((n = sscanf(lbuf, "%s %s > %s: %s",
time, src, dst, misc)) != 4)
if ((n = sscanf(lbuf, "%s %s: %s > %s: %s",
link1, link2, src, dst, misc)) != 5) {
n = sscanf(lbuf, "%s %s %s: %s > %s: %s",
time, link1, link2, src, dst, misc);
if (n != 6)
return -1;
}
if ((dots = count_dots(dst)) == 4) {
s = strrchr(src, '.');
*s++ = '\0';
(void) inet_aton(src, &ip->ip_src);
pkt.ti_sport = htons(atoi(s));
*--s = '.';
s = strrchr(dst, '.');
*s++ = '\0';
(void) inet_aton(src, &ip->ip_dst);
pkt.ti_dport = htons(atoi(s));
*--s = '.';
} else {
(void) inet_aton(src, &ip->ip_src);
(void) inet_aton(src, &ip->ip_dst);
}
ip->ip_len = ip->ip_hl = sizeof(struct ip);
s = strtok(misc, " :");
if ((p = getprotobyname(s))) {
ip->ip_p = p->p_proto;
switch (p->p_proto) {
case IPPROTO_TCP :
case IPPROTO_UDP :
s = strtok(NULL, " :");
ip->ip_len += atoi(s);
if (p->p_proto == IPPROTO_TCP)
extra = sizeof(struct tcphdr);
else if (p->p_proto == IPPROTO_UDP)
extra = sizeof(struct udphdr);
break;
#ifdef IGMP
case IPPROTO_IGMP :
extra = sizeof(struct igmp);
break;
#endif
case IPPROTO_ICMP :
extra = sizeof(struct icmp);
break;
default :
break;
}
}
slen = ip->ip_hl + extra + ip->ip_len;
return slen;
}
|
