/* $OpenBSD: tls13_error.c,v 1.1 2020/01/20 13:10:37 jsing Exp $ */
/*
 * Copyright (c) 2014,2019 Joel Sing <jsing@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <errno.h>

#include "tls13_internal.h"

void
tls13_error_clear(struct tls13_error *error)
{
        error->code = 0;
        error->subcode = 0;
        error->errnum = 0;
        error->file = NULL;
        error->line = 0;
        free(error->msg);
        error->msg = NULL;
}

static int
tls13_error_vset(struct tls13_error *error, int code, int subcode, int errnum,
    const char *file, int line, const char *fmt, va_list ap)
{
        char *errmsg = NULL;
        int rv = -1;

        tls13_error_clear(error);

        error->code = code;
        error->subcode = subcode;
        error->errnum = errnum;
        error->file = file;
        error->line = line;

        if (vasprintf(&errmsg, fmt, ap) == -1) {
                errmsg = NULL;
                goto err;
        }

        if (errnum == -1) {
                error->msg = errmsg;
                return 0;
        }

        if (asprintf(&error->msg, "%s: %s", errmsg, strerror(errnum)) == -1) {
                error->msg = NULL;
                goto err;
        }
        rv = 0;

 err:
        free(errmsg);

        return rv;
}

int
tls13_error_set(struct tls13_error *error, int code, int subcode,
    const char *file, int line, const char *fmt, ...)
{
        va_list ap;
        int errnum, rv;

        errnum = errno;

        va_start(ap, fmt);
        rv = tls13_error_vset(error, code, subcode, errnum, file, line, fmt, ap);
        va_end(ap);

        return (rv);
}

int
tls13_error_setx(struct tls13_error *error, int code, int subcode,
    const char *file, int line, const char *fmt, ...)
{
        va_list ap;
        int rv;

        va_start(ap, fmt);
        rv = tls13_error_vset(error, code, subcode, -1, file, line, fmt, ap);
        va_end(ap);

        return (rv);
}