/* $NetBSD: addipopt.c,v 1.2 2012/07/22 14:27:36 darrenr Exp $ */ /* * Copyright (C) 2012 by Darren Reed. * * See the IPFILTER.LICENCE file for details on licencing. * * Id: addipopt.c,v 1.1.1.2 2012/07/22 13:44:38 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_RR : case IPOPT_TS : s[IPOPT_OLEN] = IPOPT_MINOFF - 1 + 4; 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; } } } 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; }