1 /* $FreeBSD$ */ 2 3 /* 4 * Copyright (C) 2012 by Darren Reed. 5 * 6 * See the IPFILTER.LICENCE file for details on licencing. 7 * 8 * $Id$ 9 */ 10 11 #include "ipf.h" 12 13 14 u_32_t buildopts(cp, op, len) 15 char *cp, *op; 16 int len; 17 { 18 struct ipopt_names *io; 19 u_32_t msk = 0; 20 char *s, *t; 21 int inc; 22 23 for (s = strtok(cp, ","); s; s = strtok(NULL, ",")) { 24 if ((t = strchr(s, '='))) 25 *t++ = '\0'; 26 else 27 t = ""; 28 for (io = ionames; io->on_name; io++) { 29 if (strcasecmp(s, io->on_name) || (msk & io->on_bit)) 30 continue; 31 if ((inc = addipopt(op, io, len, t))) { 32 op += inc; 33 len += inc; 34 } 35 msk |= io->on_bit; 36 break; 37 } 38 if (!io->on_name) { 39 fprintf(stderr, "unknown IP option name %s\n", s); 40 return 0; 41 } 42 } 43 while ((len & 3) != 3) { 44 *op++ = IPOPT_NOP; 45 len++; 46 } 47 *op++ = IPOPT_EOL; 48 len++; 49 return len; 50 } 51