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