libnl  3.4.0
error.c
1 /*
2  * lib/error.c Error Handling
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation version 2.1
7  * of the License.
8  *
9  * Copyright (c) 2008 Thomas Graf <tgraf@suug.ch>
10  */
11 
12 #include <netlink-private/netlink.h>
13 #include <netlink/netlink.h>
14 
15 static const char *errmsg[NLE_MAX+1] = {
16 [NLE_SUCCESS] = "Success",
17 [NLE_FAILURE] = "Unspecific failure",
18 [NLE_INTR] = "Interrupted system call",
19 [NLE_BAD_SOCK] = "Bad socket",
20 [NLE_AGAIN] = "Try again",
21 [NLE_NOMEM] = "Out of memory",
22 [NLE_EXIST] = "Object exists",
23 [NLE_INVAL] = "Invalid input data or parameter",
24 [NLE_RANGE] = "Input data out of range",
25 [NLE_MSGSIZE] = "Message size not sufficient",
26 [NLE_OPNOTSUPP] = "Operation not supported",
27 [NLE_AF_NOSUPPORT] = "Address family not supported",
28 [NLE_OBJ_NOTFOUND] = "Object not found",
29 [NLE_NOATTR] = "Attribute not available",
30 [NLE_MISSING_ATTR] = "Missing attribute",
31 [NLE_AF_MISMATCH] = "Address family mismatch",
32 [NLE_SEQ_MISMATCH] = "Message sequence number mismatch",
33 [NLE_MSG_OVERFLOW] = "Kernel reported message overflow",
34 [NLE_MSG_TRUNC] = "Kernel reported truncated message",
35 [NLE_NOADDR] = "Invalid address for specified address family",
36 [NLE_SRCRT_NOSUPPORT] = "Source based routing not supported",
37 [NLE_MSG_TOOSHORT] = "Netlink message is too short",
38 [NLE_MSGTYPE_NOSUPPORT] = "Netlink message type is not supported",
39 [NLE_OBJ_MISMATCH] = "Object type does not match cache",
40 [NLE_NOCACHE] = "Unknown or invalid cache type",
41 [NLE_BUSY] = "Object busy",
42 [NLE_PROTO_MISMATCH] = "Protocol mismatch",
43 [NLE_NOACCESS] = "No Access",
44 [NLE_PERM] = "Operation not permitted",
45 [NLE_PKTLOC_FILE] = "Unable to open packet location file",
46 [NLE_PARSE_ERR] = "Unable to parse object",
47 [NLE_NODEV] = "No such device",
48 [NLE_IMMUTABLE] = "Immutable attribute",
49 [NLE_DUMP_INTR] = "Dump inconsistency detected, interrupted",
50 [NLE_ATTRSIZE] = "Attribute max length exceeded",
51 };
52 
53 /**
54  * Return error message for an error code
55  * @return error message
56  */
57 const char *nl_geterror(int error)
58 {
59  error = abs(error);
60 
61  if (error > NLE_MAX)
62  error = NLE_FAILURE;
63 
64  return errmsg[error];
65 }
66 
67 /**
68  * Print a libnl error message
69  * @arg s error message prefix
70  *
71  * Prints the error message of the call that failed last.
72  *
73  * If s is not NULL and *s is not a null byte the argument
74  * string is printed, followed by a colon and a blank. Then
75  * the error message and a new-line.
76  */
77 void nl_perror(int error, const char *s)
78 {
79  if (s && *s)
80  fprintf(stderr, "%s: %s\n", s, nl_geterror(error));
81  else
82  fprintf(stderr, "%s\n", nl_geterror(error));
83 }
84 
85 int nl_syserr2nlerr(int error)
86 {
87  error = abs(error);
88 
89  switch (error) {
90  case EBADF: return NLE_BAD_SOCK;
91  case EADDRINUSE: return NLE_EXIST;
92  case EEXIST: return NLE_EXIST;
93  case EADDRNOTAVAIL: return NLE_NOADDR;
94  case ESRCH: /* fall through */
95  case ENOENT: return NLE_OBJ_NOTFOUND;
96  case EINTR: return NLE_INTR;
97  case EAGAIN: return NLE_AGAIN;
98  case ENOTSOCK: return NLE_BAD_SOCK;
99  case ENOPROTOOPT: return NLE_INVAL;
100  case EFAULT: return NLE_INVAL;
101  case EACCES: return NLE_NOACCESS;
102  case EINVAL: return NLE_INVAL;
103  case ENOBUFS: return NLE_NOMEM;
104  case ENOMEM: return NLE_NOMEM;
105  case EAFNOSUPPORT: return NLE_AF_NOSUPPORT;
106  case EPROTONOSUPPORT: return NLE_PROTO_MISMATCH;
107  case EOPNOTSUPP: return NLE_OPNOTSUPP;
108  case EPERM: return NLE_PERM;
109  case EBUSY: return NLE_BUSY;
110  case ERANGE: return NLE_RANGE;
111  case ENODEV: return NLE_NODEV;
112  default: return NLE_FAILURE;
113  }
114 }
115 
116 /** @} */
117