1 |
|
|
/* $OpenBSD: print-etherip.c,v 1.9 2017/03/08 10:05:30 jca Exp $ */ |
2 |
|
|
|
3 |
|
|
/* |
4 |
|
|
* Copyright (c) 2001 Jason L. Wright (jason@thought.net) |
5 |
|
|
* All rights reserved. |
6 |
|
|
* |
7 |
|
|
* Redistribution and use in source and binary forms, with or without |
8 |
|
|
* modification, are permitted provided that the following conditions |
9 |
|
|
* are met: |
10 |
|
|
* 1. Redistributions of source code must retain the above copyright |
11 |
|
|
* notice, this list of conditions and the following disclaimer. |
12 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright |
13 |
|
|
* notice, this list of conditions and the following disclaimer in the |
14 |
|
|
* documentation and/or other materials provided with the distribution. |
15 |
|
|
* |
16 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 |
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
18 |
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
19 |
|
|
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
20 |
|
|
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
21 |
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
22 |
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
23 |
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
24 |
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
25 |
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
26 |
|
|
* POSSIBILITY OF SUCH DAMAGE. |
27 |
|
|
*/ |
28 |
|
|
|
29 |
|
|
/* |
30 |
|
|
* Format and print etherip packets |
31 |
|
|
*/ |
32 |
|
|
|
33 |
|
|
#include <sys/time.h> |
34 |
|
|
#include <sys/socket.h> |
35 |
|
|
|
36 |
|
|
#include <net/if.h> |
37 |
|
|
#include <netinet/in.h> |
38 |
|
|
#include <netinet/ip.h> |
39 |
|
|
#include <netinet/ip_var.h> |
40 |
|
|
#include <netinet/udp.h> |
41 |
|
|
#include <netinet/udp_var.h> |
42 |
|
|
#include <netinet/tcp.h> |
43 |
|
|
#include <netinet/if_ether.h> |
44 |
|
|
#include <netinet/ip_ether.h> |
45 |
|
|
|
46 |
|
|
#include <stdio.h> |
47 |
|
|
#include <stdlib.h> |
48 |
|
|
#include <string.h> |
49 |
|
|
#include <unistd.h> |
50 |
|
|
#include <stddef.h> |
51 |
|
|
|
52 |
|
|
#include "addrtoname.h" |
53 |
|
|
#include "interface.h" |
54 |
|
|
#include "extract.h" /* must come after interface.h */ |
55 |
|
|
|
56 |
|
|
extern u_short extracted_ethertype; |
57 |
|
|
|
58 |
|
|
void |
59 |
|
|
etherip_print(const u_char *bp, u_int caplen, u_int len, const u_char *bp2) |
60 |
|
|
{ |
61 |
|
|
const struct ip *ip = (const struct ip *)bp2; |
62 |
|
|
struct ether_header *eh; |
63 |
|
|
const u_char *pbuf = bp; |
64 |
|
|
u_int plen = caplen, hlen; |
65 |
|
|
u_int16_t etype; |
66 |
|
|
|
67 |
|
|
if (plen < sizeof(struct etherip_header)) { |
68 |
|
|
printf("[|etherip]"); |
69 |
|
|
return; |
70 |
|
|
} |
71 |
|
|
|
72 |
|
|
printf("etherip %s > %s ver ", ipaddr_string(&ip->ip_src), |
73 |
|
|
ipaddr_string(&ip->ip_dst)); |
74 |
|
|
|
75 |
|
|
switch (*pbuf >> 4) { |
76 |
|
|
case 2: |
77 |
|
|
hlen = 1; |
78 |
|
|
printf("%d", 2); |
79 |
|
|
break; |
80 |
|
|
case 3: |
81 |
|
|
hlen = 2; |
82 |
|
|
printf("%d", 3); |
83 |
|
|
break; |
84 |
|
|
default: |
85 |
|
|
hlen = 0; |
86 |
|
|
printf("unknown"); |
87 |
|
|
break; |
88 |
|
|
} |
89 |
|
|
printf(" len %d", len); |
90 |
|
|
if (hlen == 0) |
91 |
|
|
return; |
92 |
|
|
|
93 |
|
|
printf(": "); |
94 |
|
|
|
95 |
|
|
if (plen < hlen) { |
96 |
|
|
printf("[|etherip]"); |
97 |
|
|
return; |
98 |
|
|
} |
99 |
|
|
pbuf += hlen; |
100 |
|
|
plen -= hlen; |
101 |
|
|
len -= hlen; |
102 |
|
|
|
103 |
|
|
if (eflag) |
104 |
|
|
ether_print(pbuf, len); |
105 |
|
|
eh = (struct ether_header *)pbuf; |
106 |
|
|
if (plen < sizeof(struct ether_header)) { |
107 |
|
|
printf("[|ether]"); |
108 |
|
|
return; |
109 |
|
|
} |
110 |
|
|
etype = EXTRACT_16BITS(pbuf + offsetof(struct ether_header, ether_type)); |
111 |
|
|
pbuf += sizeof(struct ether_header); |
112 |
|
|
plen -= sizeof(struct ether_header); |
113 |
|
|
len -= sizeof(struct ether_header); |
114 |
|
|
|
115 |
|
|
/* XXX LLC? */ |
116 |
|
|
extracted_ethertype = 0; |
117 |
|
|
if (etype <= ETHERMTU) { |
118 |
|
|
if (llc_print(pbuf, len, plen, ESRC(eh), EDST(eh)) == 0) { |
119 |
|
|
if (!eflag) |
120 |
|
|
ether_print((u_char *)eh, len); |
121 |
|
|
if (extracted_ethertype) { |
122 |
|
|
printf("LLC %s", |
123 |
|
|
etherproto_string(htons(extracted_ethertype))); |
124 |
|
|
} |
125 |
|
|
if (!xflag && !qflag) |
126 |
|
|
default_print(pbuf, plen); |
127 |
|
|
} |
128 |
|
|
} else if (ether_encap_print(etype, pbuf, len, plen) == 0) { |
129 |
|
|
if (!eflag) |
130 |
|
|
ether_print((u_char *)eh, len + sizeof(*eh)); |
131 |
|
|
if (!xflag && !qflag) |
132 |
|
|
default_print(pbuf, plen); |
133 |
|
|
} |
134 |
|
|
} |