1 /* 2 * Copyright (C) 1993-2001 by Darren Reed. 3 * 4 * See the IPFILTER.LICENCE file for details on licencing. 5 * 6 * $Id: ports.c,v 1.9 2002/01/28 06:50:47 darrenr Exp $ 7 */ 8 9 #include <ctype.h> 10 11 #include "ipf.h" 12 13 14 /* 15 * check for possible presence of the port fields in the line 16 */ 17 int ports(seg, proto, pp, cp, tp, linenum) 18 char ***seg; 19 char *proto; 20 u_short *pp; 21 int *cp; 22 u_short *tp; 23 int linenum; 24 { 25 int comp = -1; 26 27 if (!*seg || !**seg || !***seg) 28 return 0; 29 if (!strcasecmp(**seg, "port") && *(*seg + 1) && *(*seg + 2)) { 30 (*seg)++; 31 if (isalnum(***seg) && *(*seg + 2)) { 32 if (portnum(**seg, proto, pp, linenum) == 0) 33 return -1; 34 (*seg)++; 35 if (!strcmp(**seg, "<>")) 36 comp = FR_OUTRANGE; 37 else if (!strcmp(**seg, "><")) 38 comp = FR_INRANGE; 39 else { 40 fprintf(stderr, 41 "%d: unknown range operator (%s)\n", 42 linenum, **seg); 43 return -1; 44 } 45 (*seg)++; 46 if (**seg == NULL) { 47 fprintf(stderr, "%d: missing 2nd port value\n", 48 linenum); 49 return -1; 50 } 51 if (portnum(**seg, proto, tp, linenum) == 0) 52 return -1; 53 } else if (!strcmp(**seg, "=") || !strcasecmp(**seg, "eq")) 54 comp = FR_EQUAL; 55 else if (!strcmp(**seg, "!=") || !strcasecmp(**seg, "ne")) 56 comp = FR_NEQUAL; 57 else if (!strcmp(**seg, "<") || !strcasecmp(**seg, "lt")) 58 comp = FR_LESST; 59 else if (!strcmp(**seg, ">") || !strcasecmp(**seg, "gt")) 60 comp = FR_GREATERT; 61 else if (!strcmp(**seg, "<=") || !strcasecmp(**seg, "le")) 62 comp = FR_LESSTE; 63 else if (!strcmp(**seg, ">=") || !strcasecmp(**seg, "ge")) 64 comp = FR_GREATERTE; 65 else { 66 fprintf(stderr, "%d: unknown comparator (%s)\n", 67 linenum, **seg); 68 return -1; 69 } 70 if (comp != FR_OUTRANGE && comp != FR_INRANGE) { 71 (*seg)++; 72 if (portnum(**seg, proto, pp, linenum) == 0) 73 return -1; 74 } 75 *cp = comp; 76 (*seg)++; 77 } 78 return 0; 79 } 80