xref: /csrg-svn/sys/netns/ns_error.h (revision 21484)
1 /*      ns_error.h     6.1     85/05/30     */
2 
3 /*
4  * Xerox NS error messages
5  */
6 
7 struct ns_errp {
8 	u_short		ns_err_num;		/* Error Number */
9 	u_short		ns_err_param;		/* Error Parameter */
10 	struct idp	ns_err_idp;		/* Initial segment of offending
11 						   packet */
12 	u_char		ns_err_lev2[12];	/* at least this much higher
13 						   level protocol */
14 };
15 struct  ns_epidp {
16 	struct idp ns_ep_idp;
17 	struct ns_errp ns_ep_errp;
18 };
19 
20 #define	NS_ERR_UNSPEC	0	/* Unspecified Error detected at dest. */
21 #define	NS_ERR_BADSUM	1	/* Bad Checksum detected at dest */
22 #define	NS_ERR_NOSOCK	2	/* Specified socket does not exist at dest*/
23 #define	NS_ERR_FULLUP	3	/* Dest. refuses packet due to resource lim.*/
24 #define	NS_ERR_UNSPEC_T	0x200	/* Unspec. Error occured before reaching dest*/
25 #define	NS_ERR_BADSUM_T	0x201	/* Bad Checksum detected in transit */
26 #define	NS_ERR_UNREACH_HOST	0x202	/* Dest cannot be reached from here*/
27 #define	NS_ERR_TOO_OLD	0x203	/* Packet x'd 15 routers without delivery*/
28 #define	NS_ERR_TOO_BIG	0x204	/* Packet too large to be forwarded through
29 				   some intermediate gateway.  The error
30 				   parameter field contains the max packet
31 				   size that can be accommodated */
32 #define NS_ERR_ATHOST	4
33 #define NS_ERR_ENROUTE	5
34 #define NS_ERR_MAX (NS_ERR_ATHOST + NS_ERR_ENROUTE + 1)
35 #define ns_err_x(c) (((c)&0x200) ? ((c) - 0x200 + NS_ERR_ATHOST) : c )
36 
37 /*
38  * Variables related to this implementation
39  * of the network systems error message protocol.
40  */
41 struct	ns_errstat {
42 /* statistics related to ns_err packets generated */
43 	int	ns_es_error;		/* # of calls to ns_error */
44 	int	ns_es_oldshort;		/* no error 'cuz old ip too short */
45 	int	ns_es_oldns_err;	/* no error 'cuz old was ns_err */
46 	int	ns_es_outhist[NS_ERR_MAX];
47 /* statistics related to input messages processed */
48 	int	ns_es_badcode;		/* ns_err_code out of range */
49 	int	ns_es_tooshort;		/* packet < IDP_MINLEN */
50 	int	ns_es_checksum;		/* bad checksum */
51 	int	ns_es_badlen;		/* calculated bound mismatch */
52 	int	ns_es_reflect;		/* number of responses */
53 	int	ns_es_inhist[NS_ERR_MAX];
54 };
55 
56 #ifdef KERNEL
57 struct	ns_errstat ns_errstat;
58 #endif
59