/*
 * Copyright (c) 1987 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)herror.c    6.6 (Berkeley) 2/24/91";
#endif /* LIBC_SCCS and not lint */

#define _KERNEL
#include "ixnet.h"
#include <stdio.h>
#include <sys/uio.h>
#include <netdb.h>
#include <unistd.h>
#include <string.h>
#include <amitcp/socketbasetags.h>

char    *h_errlist[] = {
        "Error 0",
        "Unknown host",                         /* 1 HOST_NOT_FOUND */
        "Host name lookup failure",             /* 2 TRY_AGAIN */
        "Unknown server error",                 /* 3 NO_RECOVERY */
        "No address associated with name",      /* 4 NO_ADDRESS */
};
int     h_nerr = { sizeof(h_errlist)/sizeof(h_errlist[0]) };

/*
 * herror --
 *      print the error indicated by the h_errno value.
 */
void
herror(const char *s) {
    struct iovec iov[4];
    register struct ixnet *p = (struct ixnet *)u.u_ixnet;
    register struct iovec *v = iov;

    if (p->u_networkprotocol == IX_NETWORK_AMITCP) {
        char *err;

        struct TagItem list[] = {
	    {SBTM_GETREF(SBTC_HERRNOSTRPTR), (ULONG)&h_errno},
	    {TAG_END}
        };

        err = (char *)TCP_SocketBaseTagList(list);

        if (s) {
            fputs(s, stderr);
            fputs(": ", stderr);
        }
        fputs(err, stderr);
        fputc('\n', stderr);
        fflush(stderr);
        return;
    }

    if (s && *s) {
        v->iov_base = (char *)s;
        v->iov_len = strlen(s);
        v++;
        v->iov_base = ": ";
        v->iov_len = 2;
        v++;
    }
    v->iov_base = (u_int)h_errno < h_nerr ?
        h_errlist[h_errno] : "Unknown error";
    v->iov_len = strlen(v->iov_base);
    v++;
    v->iov_base = "\n";
    v->iov_len = 1;
    writev(STDERR_FILENO, iov, (v - iov) + 1);
}