![[BACK]](/icons/cvsweb/back.gif){kind=icon}
Return to display_ipopt.c CVS log ![[TXT]](/icons/cvsweb/text.gif){kind=icon}
![[DIR]](/icons/cvsweb/dir.gif){kind=icon}
Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / hping2|
Return to display_ipopt.c CVS log | Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / hping2 |
1.1 misho 1: /*
2: * Copyright (c) 1989 The Regents of the University of California.
3: * All rights reserved.
4: *
5: * This code is derived from software contributed to Berkeley by
6: * Mike Muuss.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #include <stdio.h>
38: #include <string.h>
39: #include <sys/types.h>
40: #include <sys/socket.h>
41: #include <netinet/in.h>
42: #include <arpa/inet.h>
43:
44: #include "hping2.h"
45: #include "globals.h"
46:
47: /* ripped from ping */
48:
49: void display_ipopt(char* buf)
50: {
51: int i,j;
52: unsigned long l;
53: static int old_rrlen;
54: static char old_rr[MAX_IPOPTLEN];
55: unsigned char* cp;
56: int hlen;
57: struct myiphdr *ip;
58: struct in_addr in;
59:
60:
61: ip = (struct myiphdr *)buf;
62: hlen = ip->ihl * 4;
63:
64: cp = (u_char *)buf + sizeof(struct myiphdr);
65:
66: for (; hlen > (int)sizeof(struct myiphdr); --hlen, ++cp)
67: switch (*cp) {
68: case IPOPT_EOL:
69: hlen = 0;
70: break;
71: case IPOPT_LSRR:
72: (void)printf("LSRR: ");
73: hlen -= 2;
74: j = *++cp;
75: ++cp;
76: if (j > IPOPT_MINOFF)
77: for (;;) {
78: l = *++cp;
79: l = (l<<8) + *++cp;
80: l = (l<<8) + *++cp;
81: l = (l<<8) + *++cp;
82: in.s_addr=htonl(l);
83: printf("\t%s",inet_ntoa(in));
84: hlen -= 4;
85: j -= 4;
86: if (j <= IPOPT_MINOFF)
87: break;
88: (void)putchar('\n');
89: }
90: break;
91: case IPOPT_RR:
92: j = *++cp; /* get length */
93: i = *++cp; /* and pointer */
94: hlen -= 2;
95: if (i > j)
96: i = j;
97: i -= IPOPT_MINOFF;
98: if (i <= 0)
99: continue;
100: if (i == old_rrlen
101: && cp == (u_char *)buf + sizeof(struct myiphdr) + 2
102: && !memcmp((char *)cp, old_rr, i)) {
103: (void)printf("\t(same route)\n");
104: i = ((i + 3) / 4) * 4;
105: hlen -= i;
106: cp += i;
107: break;
108: }
109: old_rrlen = i;
110: memcpy(old_rr, cp, i);
111: (void)printf("RR: ");
112: for (;;) {
113: l = *++cp;
114: l = (l<<8) + *++cp;
115: l = (l<<8) + *++cp;
116: l = (l<<8) + *++cp;
117: in.s_addr=htonl(l);
118: printf("\t%s",inet_ntoa(in));
119: hlen -= 4;
120: i -= 4;
121: if (i <= 0)
122: break;
123: (void)putchar('\n');
124: }
125: putchar('\n');
126:
127: break;
128: case IPOPT_NOP:
129: (void)printf("NOP\n");
130: break;
131: default:
132: (void)printf("unknown option %x\n", *cp);
133: break;
134: }
135:
136: }