1
2 /*
3 * Copyright (C) 2012 by Darren Reed.
4 *
5 * See the IPFILTER.LICENCE file for details on licencing.
6 *
7 * $Id$
8 */
9
10 #include "ipf.h"
11
12
13 int
addipopt(char * op,struct ipopt_names * io,int len,char * class)14 addipopt(char *op, struct ipopt_names *io, int len, char *class)
15 {
16 int olen = len;
17 struct in_addr ipadr;
18 u_short val;
19 u_char lvl;
20 char *s;
21
22 if ((len + io->on_siz) > 48) {
23 fprintf(stderr, "options too long\n");
24 return (0);
25 }
26 len += io->on_siz;
27 *op++ = io->on_value;
28 if (io->on_siz > 1) {
29 s = op;
30 *op++ = io->on_siz;
31 *op++ = IPOPT_MINOFF;
32
33 if (class) {
34 switch (io->on_value)
35 {
36 case IPOPT_SECURITY :
37 lvl = seclevel(class);
38 *(op - 1) = lvl;
39 break;
40 case IPOPT_RR :
41 case IPOPT_TS :
42 s[IPOPT_OLEN] = IPOPT_MINOFF - 1 + 4;
43 break;
44 case IPOPT_LSRR :
45 case IPOPT_SSRR :
46 ipadr.s_addr = inet_addr(class);
47 s[IPOPT_OLEN] = IPOPT_MINOFF - 1 + 4;
48 bcopy((char *)&ipadr, op, sizeof(ipadr));
49 break;
50 case IPOPT_SATID :
51 val = atoi(class);
52 bcopy((char *)&val, op, 2);
53 break;
54 }
55 }
56 }
57 if (opts & OPT_DEBUG)
58 fprintf(stderr, "bo: %s %d %#x: %d\n",
59 io->on_name, io->on_value, io->on_bit, len);
60 return (len - olen);
61 }
62