1 /* 2 * Copyright (c) 1984, 1985 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 * 6 * @(#)ns_error.h 6.3 (Berkeley) 02/03/86 7 */ 8 9 /* 10 * Xerox NS error messages 11 */ 12 13 struct ns_errp { 14 u_short ns_err_num; /* Error Number */ 15 u_short ns_err_param; /* Error Parameter */ 16 struct idp ns_err_idp; /* Initial segment of offending 17 packet */ 18 u_char ns_err_lev2[12]; /* at least this much higher 19 level protocol */ 20 }; 21 struct ns_epidp { 22 struct idp ns_ep_idp; 23 struct ns_errp ns_ep_errp; 24 }; 25 26 #define NS_ERR_UNSPEC 0 /* Unspecified Error detected at dest. */ 27 #define NS_ERR_BADSUM 1 /* Bad Checksum detected at dest */ 28 #define NS_ERR_NOSOCK 2 /* Specified socket does not exist at dest*/ 29 #define NS_ERR_FULLUP 3 /* Dest. refuses packet due to resource lim.*/ 30 #define NS_ERR_UNSPEC_T 0x200 /* Unspec. Error occured before reaching dest*/ 31 #define NS_ERR_BADSUM_T 0x201 /* Bad Checksum detected in transit */ 32 #define NS_ERR_UNREACH_HOST 0x202 /* Dest cannot be reached from here*/ 33 #define NS_ERR_TOO_OLD 0x203 /* Packet x'd 15 routers without delivery*/ 34 #define NS_ERR_TOO_BIG 0x204 /* Packet too large to be forwarded through 35 some intermediate gateway. The error 36 parameter field contains the max packet 37 size that can be accommodated */ 38 #define NS_ERR_ATHOST 4 39 #define NS_ERR_ENROUTE 5 40 #define NS_ERR_MAX (NS_ERR_ATHOST + NS_ERR_ENROUTE + 1) 41 #define ns_err_x(c) (((c)&0x200) ? ((c) - 0x200 + NS_ERR_ATHOST) : c ) 42 43 /* 44 * Variables related to this implementation 45 * of the network systems error message protocol. 46 */ 47 struct ns_errstat { 48 /* statistics related to ns_err packets generated */ 49 int ns_es_error; /* # of calls to ns_error */ 50 int ns_es_oldshort; /* no error 'cuz old ip too short */ 51 int ns_es_oldns_err; /* no error 'cuz old was ns_err */ 52 int ns_es_outhist[NS_ERR_MAX]; 53 /* statistics related to input messages processed */ 54 int ns_es_badcode; /* ns_err_code out of range */ 55 int ns_es_tooshort; /* packet < IDP_MINLEN */ 56 int ns_es_checksum; /* bad checksum */ 57 int ns_es_badlen; /* calculated bound mismatch */ 58 int ns_es_reflect; /* number of responses */ 59 int ns_es_inhist[NS_ERR_MAX]; 60 }; 61 62 #ifdef KERNEL 63 struct ns_errstat ns_errstat; 64 #endif 65