1 /* 2 * Copyright (C) 1993-2001 by Darren Reed. 3 * 4 * See the IPFILTER.LICENCE file for details on licencing. 5 * 6 * $Id: icmpcode.c,v 1.6 2001/06/09 17:09:24 darrenr Exp $ 7 */ 8 9 #include <ctype.h> 10 11 #include "ipf.h" 12 13 #ifndef MIN 14 # define MIN(a,b) ((a) > (b) ? (b) : (a)) 15 #endif 16 17 18 char *icmpcodes[MAX_ICMPCODE + 1] = { 19 "net-unr", "host-unr", "proto-unr", "port-unr", "needfrag", "srcfail", 20 "net-unk", "host-unk", "isolate", "net-prohib", "host-prohib", 21 "net-tos", "host-tos", "filter-prohib", "host-preced", "preced-cutoff", 22 NULL }; 23 24 /* 25 * Return the number for the associated ICMP unreachable code. 26 */ 27 int icmpcode(str) 28 char *str; 29 { 30 char *s; 31 int i, len; 32 33 if ((s = strrchr(str, ')'))) 34 *s = '\0'; 35 if (isdigit(*str)) { 36 if (!ratoi(str, &i, 0, 255)) 37 return -1; 38 else 39 return i; 40 } 41 len = strlen(str); 42 for (i = 0; icmpcodes[i]; i++) 43 if (!strncasecmp(str, icmpcodes[i], MIN(len, 44 strlen(icmpcodes[i])) )) 45 return i; 46 return -1; 47 } 48