1*f3ac6781SToomas Soome /*
2*f3ac6781SToomas Soome * Copyright (C) 1993-2001 by Darren Reed.
3*f3ac6781SToomas Soome *
4*f3ac6781SToomas Soome * See the IPFILTER.LICENCE file for details on licencing.
5*f3ac6781SToomas Soome *
6*f3ac6781SToomas Soome * $Id: addipopt.c,v 1.7 2002/01/28 06:50:45 darrenr Exp $
7*f3ac6781SToomas Soome */
8*f3ac6781SToomas Soome
9*f3ac6781SToomas Soome #include "ipf.h"
10*f3ac6781SToomas Soome
11*f3ac6781SToomas Soome
addipopt(op,io,len,class)12*f3ac6781SToomas Soome int addipopt(op, io, len, class)
13*f3ac6781SToomas Soome char *op;
14*f3ac6781SToomas Soome struct ipopt_names *io;
15*f3ac6781SToomas Soome int len;
16*f3ac6781SToomas Soome char *class;
17*f3ac6781SToomas Soome {
18*f3ac6781SToomas Soome int olen = len;
19*f3ac6781SToomas Soome struct in_addr ipadr;
20*f3ac6781SToomas Soome u_short val;
21*f3ac6781SToomas Soome u_char lvl;
22*f3ac6781SToomas Soome char *s;
23*f3ac6781SToomas Soome
24*f3ac6781SToomas Soome if ((len + io->on_siz) > 48) {
25*f3ac6781SToomas Soome fprintf(stderr, "options too long\n");
26*f3ac6781SToomas Soome return 0;
27*f3ac6781SToomas Soome }
28*f3ac6781SToomas Soome len += io->on_siz;
29*f3ac6781SToomas Soome *op++ = io->on_value;
30*f3ac6781SToomas Soome if (io->on_siz > 1) {
31*f3ac6781SToomas Soome s = op;
32*f3ac6781SToomas Soome *op++ = io->on_siz;
33*f3ac6781SToomas Soome *op++ = IPOPT_MINOFF;
34*f3ac6781SToomas Soome
35*f3ac6781SToomas Soome if (class) {
36*f3ac6781SToomas Soome switch (io->on_value)
37*f3ac6781SToomas Soome {
38*f3ac6781SToomas Soome case IPOPT_SECURITY :
39*f3ac6781SToomas Soome lvl = seclevel(class);
40*f3ac6781SToomas Soome *(op - 1) = lvl;
41*f3ac6781SToomas Soome break;
42*f3ac6781SToomas Soome case IPOPT_LSRR :
43*f3ac6781SToomas Soome case IPOPT_SSRR :
44*f3ac6781SToomas Soome ipadr.s_addr = inet_addr(class);
45*f3ac6781SToomas Soome s[IPOPT_OLEN] = IPOPT_MINOFF - 1 + 4;
46*f3ac6781SToomas Soome bcopy((char *)&ipadr, op, sizeof(ipadr));
47*f3ac6781SToomas Soome break;
48*f3ac6781SToomas Soome case IPOPT_SATID :
49*f3ac6781SToomas Soome val = atoi(class);
50*f3ac6781SToomas Soome bcopy((char *)&val, op, 2);
51*f3ac6781SToomas Soome break;
52*f3ac6781SToomas Soome }
53*f3ac6781SToomas Soome }
54*f3ac6781SToomas Soome
55*f3ac6781SToomas Soome op += io->on_siz - 3;
56*f3ac6781SToomas Soome if (len & 3) {
57*f3ac6781SToomas Soome *op++ = IPOPT_NOP;
58*f3ac6781SToomas Soome len++;
59*f3ac6781SToomas Soome }
60*f3ac6781SToomas Soome }
61*f3ac6781SToomas Soome if (opts & OPT_DEBUG)
62*f3ac6781SToomas Soome fprintf(stderr, "bo: %s %d %#x: %d\n",
63*f3ac6781SToomas Soome io->on_name, io->on_value, io->on_bit, len);
64*f3ac6781SToomas Soome return len - olen;
65*f3ac6781SToomas Soome }
66