138 lines
3.5 KiB
C
138 lines
3.5 KiB
C
/* $NetBSD: opt.c,v 1.1.1.2 1997/03/27 15:13:58 darrenr Exp $ */
|
|
|
|
/*
|
|
* (C)opyright 1993,1994,1995 by Darren Reed.
|
|
*
|
|
* Redistribution and use in source and binary forms are permitted
|
|
* provided that this notice is preserved and due credit is given
|
|
* to the original author and the contributors.
|
|
*/
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <sys/time.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_systm.h>
|
|
#include <netinet/ip.h>
|
|
#include <netinet/ip_var.h>
|
|
#include <netinet/tcp.h>
|
|
#include <netinet/tcpip.h>
|
|
#include <net/if.h>
|
|
#include <netinet/ip_compat.h>
|
|
#include "ipf.h"
|
|
|
|
#if !defined(lint) && defined(LIBC_SCCS)
|
|
static char sccsid[] = "@(#)opt.c 1.8 4/10/96 (C) 1993-1995 Darren Reed";
|
|
static char rcsid[] = "$Id: opt.c,v 1.1.1.2 1997/03/27 15:13:58 darrenr Exp $";
|
|
#endif
|
|
|
|
extern int opts;
|
|
|
|
struct ipopt_names ionames[] ={
|
|
{ IPOPT_NOP, 0x000001, 1, "nop" },
|
|
{ IPOPT_RR, 0x000002, 7, "rr" }, /* 1 route */
|
|
{ IPOPT_ZSU, 0x000004, 3, "zsu" },
|
|
{ IPOPT_MTUP, 0x000008, 3, "mtup" },
|
|
{ IPOPT_MTUR, 0x000010, 3, "mtur" },
|
|
{ IPOPT_ENCODE, 0x000020, 3, "encode" },
|
|
{ IPOPT_TS, 0x000040, 8, "ts" }, /* 1 TS */
|
|
{ IPOPT_TR, 0x000080, 3, "tr" },
|
|
{ IPOPT_SECURITY,0x000100, 11, "sec" },
|
|
{ IPOPT_SECURITY,0x000100, 11, "sec-class" },
|
|
{ IPOPT_LSRR, 0x000200, 7, "lsrr" }, /* 1 route */
|
|
{ IPOPT_E_SEC, 0x000400, 3, "e-sec" },
|
|
{ IPOPT_CIPSO, 0x000800, 3, "cipso" },
|
|
{ IPOPT_SATID, 0x001000, 4, "satid" },
|
|
{ IPOPT_SSRR, 0x002000, 7, "ssrr" }, /* 1 route */
|
|
{ IPOPT_ADDEXT, 0x004000, 3, "addext" },
|
|
{ IPOPT_VISA, 0x008000, 3, "visa" },
|
|
{ IPOPT_IMITD, 0x010000, 3, "imitd" },
|
|
{ IPOPT_EIP, 0x020000, 3, "eip" },
|
|
{ IPOPT_FINN, 0x040000, 3, "finn" },
|
|
{ 0, 0, 0, (char *)NULL } /* must be last */
|
|
};
|
|
|
|
struct ipopt_names secclass[] = {
|
|
{ IPSO_CLASS_RES4, 0x01, 0, "reserv-4" },
|
|
{ IPSO_CLASS_TOPS, 0x02, 0, "topsecret" },
|
|
{ IPSO_CLASS_SECR, 0x04, 0, "secret" },
|
|
{ IPSO_CLASS_RES3, 0x08, 0, "reserv-3" },
|
|
{ IPSO_CLASS_CONF, 0x10, 0, "confid" },
|
|
{ IPSO_CLASS_UNCL, 0x20, 0, "unclass" },
|
|
{ IPSO_CLASS_RES2, 0x40, 0, "reserv-2" },
|
|
{ IPSO_CLASS_RES1, 0x80, 0, "reserv-1" },
|
|
{ 0, 0, 0, NULL } /* must be last */
|
|
};
|
|
|
|
static u_char seclevel __P((char *));
|
|
|
|
static u_char seclevel(slevel)
|
|
char *slevel;
|
|
{
|
|
struct ipopt_names *so;
|
|
|
|
for (so = secclass; so->on_name; so++)
|
|
if (!strcasecmp(slevel, so->on_name))
|
|
break;
|
|
|
|
if (!so->on_name) {
|
|
fprintf(stderr, "no such security level: %s\n", slevel);
|
|
return 0;
|
|
}
|
|
return (u_char)so->on_value;
|
|
}
|
|
|
|
|
|
u_long buildopts(cp, op)
|
|
char *cp, *op;
|
|
{
|
|
struct ipopt_names *io;
|
|
u_char lvl;
|
|
u_long msk = 0;
|
|
char *s, *t;
|
|
int len = 0;
|
|
|
|
for (s = strtok(cp, ","); s; s = strtok(NULL, ",")) {
|
|
if ((t = strchr(s, '=')))
|
|
*t++ = '\0';
|
|
for (io = ionames; io->on_name; io++) {
|
|
if (strcasecmp(s, io->on_name) || (msk & io->on_bit))
|
|
continue;
|
|
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) {
|
|
*op++ = io->on_siz;
|
|
*op++ = IPOPT_MINOFF;
|
|
|
|
if (t && !strcasecmp(s, "sec-class")) {
|
|
lvl = seclevel(t);
|
|
*(op - 1) = lvl;
|
|
}
|
|
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);
|
|
msk |= io->on_bit;
|
|
break;
|
|
}
|
|
if (!io->on_name) {
|
|
fprintf(stderr, "unknown IP option name %s\n", s);
|
|
return 0;
|
|
}
|
|
}
|
|
*op++ = IPOPT_EOL;
|
|
len++;
|
|
return len;
|
|
}
|