xref: /illumos-gate/usr/src/cmd/ipf/lib/common/addipopt.c (revision 7c478bd9)
1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate  * Copyright (C) 1993-2001 by Darren Reed.
3*7c478bd9Sstevel@tonic-gate  *
4*7c478bd9Sstevel@tonic-gate  * See the IPFILTER.LICENCE file for details on licencing.
5*7c478bd9Sstevel@tonic-gate  *
6*7c478bd9Sstevel@tonic-gate  * $Id: addipopt.c,v 1.7 2002/01/28 06:50:45 darrenr Exp $
7*7c478bd9Sstevel@tonic-gate  */
8*7c478bd9Sstevel@tonic-gate 
9*7c478bd9Sstevel@tonic-gate #include "ipf.h"
10*7c478bd9Sstevel@tonic-gate 
11*7c478bd9Sstevel@tonic-gate 
addipopt(op,io,len,class)12*7c478bd9Sstevel@tonic-gate int addipopt(op, io, len, class)
13*7c478bd9Sstevel@tonic-gate char *op;
14*7c478bd9Sstevel@tonic-gate struct ipopt_names *io;
15*7c478bd9Sstevel@tonic-gate int len;
16*7c478bd9Sstevel@tonic-gate char *class;
17*7c478bd9Sstevel@tonic-gate {
18*7c478bd9Sstevel@tonic-gate 	int olen = len;
19*7c478bd9Sstevel@tonic-gate 	struct in_addr ipadr;
20*7c478bd9Sstevel@tonic-gate 	u_short val;
21*7c478bd9Sstevel@tonic-gate 	u_char lvl;
22*7c478bd9Sstevel@tonic-gate 	char *s;
23*7c478bd9Sstevel@tonic-gate 
24*7c478bd9Sstevel@tonic-gate 	if ((len + io->on_siz) > 48) {
25*7c478bd9Sstevel@tonic-gate 		fprintf(stderr, "options too long\n");
26*7c478bd9Sstevel@tonic-gate 		return 0;
27*7c478bd9Sstevel@tonic-gate 	}
28*7c478bd9Sstevel@tonic-gate 	len += io->on_siz;
29*7c478bd9Sstevel@tonic-gate 	*op++ = io->on_value;
30*7c478bd9Sstevel@tonic-gate 	if (io->on_siz > 1) {
31*7c478bd9Sstevel@tonic-gate 		s = op;
32*7c478bd9Sstevel@tonic-gate 		*op++ = io->on_siz;
33*7c478bd9Sstevel@tonic-gate 		*op++ = IPOPT_MINOFF;
34*7c478bd9Sstevel@tonic-gate 
35*7c478bd9Sstevel@tonic-gate 		if (class) {
36*7c478bd9Sstevel@tonic-gate 			switch (io->on_value)
37*7c478bd9Sstevel@tonic-gate 			{
38*7c478bd9Sstevel@tonic-gate 			case IPOPT_SECURITY :
39*7c478bd9Sstevel@tonic-gate 				lvl = seclevel(class);
40*7c478bd9Sstevel@tonic-gate 				*(op - 1) = lvl;
41*7c478bd9Sstevel@tonic-gate 				break;
42*7c478bd9Sstevel@tonic-gate 			case IPOPT_LSRR :
43*7c478bd9Sstevel@tonic-gate 			case IPOPT_SSRR :
44*7c478bd9Sstevel@tonic-gate 				ipadr.s_addr = inet_addr(class);
45*7c478bd9Sstevel@tonic-gate 				s[IPOPT_OLEN] = IPOPT_MINOFF - 1 + 4;
46*7c478bd9Sstevel@tonic-gate 				bcopy((char *)&ipadr, op, sizeof(ipadr));
47*7c478bd9Sstevel@tonic-gate 				break;
48*7c478bd9Sstevel@tonic-gate 			case IPOPT_SATID :
49*7c478bd9Sstevel@tonic-gate 				val = atoi(class);
50*7c478bd9Sstevel@tonic-gate 				bcopy((char *)&val, op, 2);
51*7c478bd9Sstevel@tonic-gate 				break;
52*7c478bd9Sstevel@tonic-gate 			}
53*7c478bd9Sstevel@tonic-gate 		}
54*7c478bd9Sstevel@tonic-gate 
55*7c478bd9Sstevel@tonic-gate 		op += io->on_siz - 3;
56*7c478bd9Sstevel@tonic-gate 		if (len & 3) {
57*7c478bd9Sstevel@tonic-gate 			*op++ = IPOPT_NOP;
58*7c478bd9Sstevel@tonic-gate 			len++;
59*7c478bd9Sstevel@tonic-gate 		}
60*7c478bd9Sstevel@tonic-gate 	}
61*7c478bd9Sstevel@tonic-gate 	if (opts & OPT_DEBUG)
62*7c478bd9Sstevel@tonic-gate 		fprintf(stderr, "bo: %s %d %#x: %d\n",
63*7c478bd9Sstevel@tonic-gate 			io->on_name, io->on_value, io->on_bit, len);
64*7c478bd9Sstevel@tonic-gate 	return len - olen;
65*7c478bd9Sstevel@tonic-gate }
66