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error.c

/*
 * lib/error.c          Error Handling
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation version 2.1
 *    of the License.
 *
 * Copyright (c) 2008 Thomas Graf <tgraf@suug.ch>
 */

#include <netlink-local.h>
#include <netlink/netlink.h>

static const char *errmsg[NLE_MAX+1] = {
[NLE_SUCCESS]           = "Success",
[NLE_FAILURE]           = "Unspecific failure",
[NLE_INTR]        = "Interrupted system call",
[NLE_BAD_SOCK]          = "Bad socket",
[NLE_AGAIN]       = "Try again",
[NLE_NOMEM]       = "Out of memory",
[NLE_EXIST]       = "Object exists",
[NLE_INVAL]       = "Invalid input data or parameter",
[NLE_RANGE]       = "Input data out of range",
[NLE_MSGSIZE]           = "Message size not sufficient",
[NLE_OPNOTSUPP]         = "Operation not supported",
[NLE_AF_NOSUPPORT]      = "Address family not supported",
[NLE_OBJ_NOTFOUND]      = "Object not found",
[NLE_NOATTR]            = "Attribute not available",
[NLE_MISSING_ATTR]      = "Missing attribute",
[NLE_AF_MISMATCH] = "Address family mismatch",
[NLE_SEQ_MISMATCH]      = "Message sequence number mismatch",
[NLE_MSG_OVERFLOW]      = "Kernel reported message overflow",
[NLE_MSG_TRUNC]         = "Kernel reported truncated message",
[NLE_NOADDR]            = "Invalid address for specified address family",
[NLE_SRCRT_NOSUPPORT]   = "Source based routing not supported",
[NLE_MSG_TOOSHORT]      = "Netlink message is too short",
[NLE_MSGTYPE_NOSUPPORT] = "Netlink message type is not supported",
[NLE_OBJ_MISMATCH]      = "Object type does not match cache",
[NLE_NOCACHE]           = "Unknown or invalid cache type",
[NLE_BUSY]        = "Object busy",
[NLE_PROTO_MISMATCH]    = "Protocol mismatch",
[NLE_NOACCESS]          = "No Access",
[NLE_PERM]        = "Operation not permitted",
[NLE_PKTLOC_FILE] = "Unable to open packet location file",
};

/**
 * Return error message for an error code
 * @return error message
 */
const char *nl_geterror(int error)
{
      error = abs(error);

      if (error > NLE_MAX)
            error = NLE_FAILURE;

      return errmsg[error];
}

/**
 * Print a libnl error message
 * @arg s         error message prefix
 *
 * Prints the error message of the call that failed last.
 *
 * If s is not NULL and *s is not a null byte the argument
 * string is printed, followed by a colon and a blank. Then
 * the error message and a new-line.
 */
void nl_perror(int error, const char *s)
{
      if (s && *s)
            fprintf(stderr, "%s: %s\n", s, nl_geterror(error));
      else
            fprintf(stderr, "%s\n", nl_geterror(error));
}

int nl_syserr2nlerr(int error)
{
      error = abs(error);

      switch (error) {
      case EBADF:       return NLE_BAD_SOCK;
      case EADDRINUSE:  return NLE_EXIST;
      case EEXIST:            return NLE_EXIST;
      case EADDRNOTAVAIL:     return NLE_NOADDR;
      case ENOENT:            return NLE_OBJ_NOTFOUND;
      case EINTR:       return NLE_INTR;
      case EAGAIN:            return NLE_AGAIN;
      case ENOTSOCK:          return NLE_BAD_SOCK;
      case ENOPROTOOPT: return NLE_INVAL;
      case EFAULT:            return NLE_INVAL;
      case EACCES:            return NLE_NOACCESS;
      case EINVAL:            return NLE_INVAL;
      case ENOBUFS:           return NLE_NOMEM;
      case ENOMEM:            return NLE_NOMEM;
      case EAFNOSUPPORT:      return NLE_AF_NOSUPPORT;
      case EPROTONOSUPPORT:   return NLE_PROTO_MISMATCH;
      case EOPNOTSUPP:  return NLE_OPNOTSUPP;
      case EPERM:       return NLE_PERM;
      case EBUSY:       return NLE_BUSY;
      case ERANGE:            return NLE_RANGE;
      default:          return NLE_FAILURE;
      }
}

/** @} */


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