f8113f0a65
The companion libnetmap changes for the "offsets" kernel support added
in a6d768d845. This includes code to parse the "@offset=NNN"
option that can be appended to the port name by any nmport_* application.
Example:
# pkt-gen -i 'netmap:em0@offset=16'
143 lines
3.1 KiB
C
143 lines
3.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (C) 2018 Universita` di Pisa
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <net/netmap_user.h>
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#define LIBNETMAP_NOTHREADSAFE
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#include "libnetmap.h"
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static void
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nmctx_default_error(struct nmctx *ctx, const char *errmsg)
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{
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(void)ctx;
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fprintf(stderr, "%s\n", errmsg);
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}
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static void *
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nmctx_default_malloc(struct nmctx *ctx, size_t sz)
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{
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(void)ctx;
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return malloc(sz);
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}
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static void
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nmctx_default_free(struct nmctx *ctx, void *p)
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{
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(void)ctx;
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free(p);
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}
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static struct nmctx nmctx_global = {
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.verbose = 1,
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.error = nmctx_default_error,
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.malloc = nmctx_default_malloc,
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.free = nmctx_default_free,
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.lock = NULL,
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};
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static struct nmctx *nmctx_default = &nmctx_global;
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struct nmctx *
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nmctx_get(void)
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{
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return nmctx_default;
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}
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struct nmctx *
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nmctx_set_default(struct nmctx *ctx)
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{
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struct nmctx *old = nmctx_default;
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nmctx_default = ctx;
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return old;
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}
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#define MAXERRMSG 1000
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void
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nmctx_ferror(struct nmctx *ctx, const char *fmt, ...)
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{
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char errmsg[MAXERRMSG];
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va_list ap;
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int rv;
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if (!ctx->verbose)
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return;
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va_start(ap, fmt);
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rv = vsnprintf(errmsg, MAXERRMSG, fmt, ap);
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va_end(ap);
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if (rv > 0) {
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if (rv < MAXERRMSG) {
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ctx->error(ctx, errmsg);
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} else {
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ctx->error(ctx, "error message too long");
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}
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} else {
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ctx->error(ctx, "internal error");
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}
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}
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void *
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nmctx_malloc(struct nmctx *ctx, size_t sz)
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{
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return ctx->malloc(ctx, sz);
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}
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void
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nmctx_free(struct nmctx *ctx, void *p)
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{
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ctx->free(ctx, p);
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}
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void
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nmctx_lock(struct nmctx *ctx)
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{
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if (ctx->lock != NULL)
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ctx->lock(ctx, 1);
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}
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void
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nmctx_unlock(struct nmctx *ctx)
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{
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if (ctx->lock != NULL)
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ctx->lock(ctx, 0);
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}
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