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/* $FreeBSD$ */
/*
* Copyright (C) 1993-2001 by Darren Reed.
*
* See the IPFILTER.LICENCE file for details on licencing.
*
* Id: addipopt.c,v 1.7 2002/01/28 06:50:45 darrenr Exp
*/
#include "ipf.h"
int addipopt(op, io, len, class)
char *op;
struct ipopt_names *io;
int len;
char *class;
{
int olen = len;
struct in_addr ipadr;
u_short val;
u_char lvl;
char *s;
if ((len + io->on_siz) > 48) {
fprintf(stderr, "options too long\n");
return 0;
}
len += io->on_siz;
*op++ = io->on_value;
if (io->on_siz > 1) {
s = op;
*op++ = io->on_siz;
*op++ = IPOPT_MINOFF;
if (class) {
switch (io->on_value)
{
case IPOPT_SECURITY :
lvl = seclevel(class);
*(op - 1) = lvl;
break;
case IPOPT_LSRR :
case IPOPT_SSRR :
ipadr.s_addr = inet_addr(class);
s[IPOPT_OLEN] = IPOPT_MINOFF - 1 + 4;
bcopy((char *)&ipadr, op, sizeof(ipadr));
break;
case IPOPT_SATID :
val = atoi(class);
bcopy((char *)&val, op, 2);
break;
}
}
op += io->on_siz - 3;
if (len & 3) {
*op++ = IPOPT_NOP;
len++;
}
}
if (opts & OPT_DEBUG)
fprintf(stderr, "bo: %s %d %#x: %d\n",
io->on_name, io->on_value, io->on_bit, len);
return len - olen;
}
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