14c067f38SVincenzo Maffione /*-
2*4d846d26SWarner Losh * SPDX-License-Identifier: BSD-2-Clause
34c067f38SVincenzo Maffione *
44c067f38SVincenzo Maffione * Copyright (C) 2018 Universita` di Pisa
54c067f38SVincenzo Maffione * All rights reserved.
64c067f38SVincenzo Maffione *
74c067f38SVincenzo Maffione * Redistribution and use in source and binary forms, with or without
84c067f38SVincenzo Maffione * modification, are permitted provided that the following conditions
94c067f38SVincenzo Maffione * are met:
104c067f38SVincenzo Maffione *
114c067f38SVincenzo Maffione * 1. Redistributions of source code must retain the above copyright
124c067f38SVincenzo Maffione * notice, this list of conditions and the following disclaimer.
134c067f38SVincenzo Maffione * 2. Redistributions in binary form must reproduce the above copyright
144c067f38SVincenzo Maffione * notice, this list of conditions and the following disclaimer in the
154c067f38SVincenzo Maffione * documentation and/or other materials provided with the distribution.
164c067f38SVincenzo Maffione *
174c067f38SVincenzo Maffione * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
184c067f38SVincenzo Maffione * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
194c067f38SVincenzo Maffione * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
204c067f38SVincenzo Maffione * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
214c067f38SVincenzo Maffione * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
224c067f38SVincenzo Maffione * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
234c067f38SVincenzo Maffione * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
244c067f38SVincenzo Maffione * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
254c067f38SVincenzo Maffione * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
264c067f38SVincenzo Maffione * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
274c067f38SVincenzo Maffione * SUCH DAMAGE.
284c067f38SVincenzo Maffione */
294c067f38SVincenzo Maffione
305c4f8d80SVincenzo Maffione #include <sys/types.h>
315c4f8d80SVincenzo Maffione #include <sys/stat.h>
325c4f8d80SVincenzo Maffione #include <sys/ioctl.h>
335c4f8d80SVincenzo Maffione #include <sys/mman.h>
345c4f8d80SVincenzo Maffione #include <fcntl.h>
355c4f8d80SVincenzo Maffione #include <stdlib.h>
365c4f8d80SVincenzo Maffione #include <stdio.h>
375c4f8d80SVincenzo Maffione #include <stdarg.h>
385c4f8d80SVincenzo Maffione #include <string.h>
395c4f8d80SVincenzo Maffione #include <unistd.h>
405c4f8d80SVincenzo Maffione #include <errno.h>
415c4f8d80SVincenzo Maffione #include <net/netmap_user.h>
425c4f8d80SVincenzo Maffione #define LIBNETMAP_NOTHREADSAFE
435c4f8d80SVincenzo Maffione #include "libnetmap.h"
445c4f8d80SVincenzo Maffione
455c4f8d80SVincenzo Maffione static void
nmctx_default_error(struct nmctx * ctx,const char * errmsg)465c4f8d80SVincenzo Maffione nmctx_default_error(struct nmctx *ctx, const char *errmsg)
475c4f8d80SVincenzo Maffione {
48f8113f0aSVincenzo Maffione (void)ctx;
495c4f8d80SVincenzo Maffione fprintf(stderr, "%s\n", errmsg);
505c4f8d80SVincenzo Maffione }
515c4f8d80SVincenzo Maffione
525c4f8d80SVincenzo Maffione static void *
nmctx_default_malloc(struct nmctx * ctx,size_t sz)535c4f8d80SVincenzo Maffione nmctx_default_malloc(struct nmctx *ctx, size_t sz)
545c4f8d80SVincenzo Maffione {
555c4f8d80SVincenzo Maffione (void)ctx;
565c4f8d80SVincenzo Maffione return malloc(sz);
575c4f8d80SVincenzo Maffione }
585c4f8d80SVincenzo Maffione
595c4f8d80SVincenzo Maffione static void
nmctx_default_free(struct nmctx * ctx,void * p)605c4f8d80SVincenzo Maffione nmctx_default_free(struct nmctx *ctx, void *p)
615c4f8d80SVincenzo Maffione {
625c4f8d80SVincenzo Maffione (void)ctx;
635c4f8d80SVincenzo Maffione free(p);
645c4f8d80SVincenzo Maffione }
655c4f8d80SVincenzo Maffione
665c4f8d80SVincenzo Maffione static struct nmctx nmctx_global = {
675c4f8d80SVincenzo Maffione .verbose = 1,
685c4f8d80SVincenzo Maffione .error = nmctx_default_error,
695c4f8d80SVincenzo Maffione .malloc = nmctx_default_malloc,
705c4f8d80SVincenzo Maffione .free = nmctx_default_free,
715c4f8d80SVincenzo Maffione .lock = NULL,
725c4f8d80SVincenzo Maffione };
735c4f8d80SVincenzo Maffione
745c4f8d80SVincenzo Maffione static struct nmctx *nmctx_default = &nmctx_global;
755c4f8d80SVincenzo Maffione
765c4f8d80SVincenzo Maffione struct nmctx *
nmctx_get(void)775c4f8d80SVincenzo Maffione nmctx_get(void)
785c4f8d80SVincenzo Maffione {
795c4f8d80SVincenzo Maffione return nmctx_default;
805c4f8d80SVincenzo Maffione }
815c4f8d80SVincenzo Maffione
825c4f8d80SVincenzo Maffione struct nmctx *
nmctx_set_default(struct nmctx * ctx)835c4f8d80SVincenzo Maffione nmctx_set_default(struct nmctx *ctx)
845c4f8d80SVincenzo Maffione {
855c4f8d80SVincenzo Maffione struct nmctx *old = nmctx_default;
865c4f8d80SVincenzo Maffione nmctx_default = ctx;
875c4f8d80SVincenzo Maffione return old;
885c4f8d80SVincenzo Maffione }
895c4f8d80SVincenzo Maffione
905c4f8d80SVincenzo Maffione #define MAXERRMSG 1000
915c4f8d80SVincenzo Maffione void
nmctx_ferror(struct nmctx * ctx,const char * fmt,...)925c4f8d80SVincenzo Maffione nmctx_ferror(struct nmctx *ctx, const char *fmt, ...)
935c4f8d80SVincenzo Maffione {
945c4f8d80SVincenzo Maffione char errmsg[MAXERRMSG];
955c4f8d80SVincenzo Maffione va_list ap;
965c4f8d80SVincenzo Maffione int rv;
975c4f8d80SVincenzo Maffione
985c4f8d80SVincenzo Maffione if (!ctx->verbose)
995c4f8d80SVincenzo Maffione return;
1005c4f8d80SVincenzo Maffione
1015c4f8d80SVincenzo Maffione va_start(ap, fmt);
1025c4f8d80SVincenzo Maffione rv = vsnprintf(errmsg, MAXERRMSG, fmt, ap);
1035c4f8d80SVincenzo Maffione va_end(ap);
1045c4f8d80SVincenzo Maffione
1055c4f8d80SVincenzo Maffione if (rv > 0) {
1065c4f8d80SVincenzo Maffione if (rv < MAXERRMSG) {
1075c4f8d80SVincenzo Maffione ctx->error(ctx, errmsg);
1085c4f8d80SVincenzo Maffione } else {
1095c4f8d80SVincenzo Maffione ctx->error(ctx, "error message too long");
1105c4f8d80SVincenzo Maffione }
1115c4f8d80SVincenzo Maffione } else {
1125c4f8d80SVincenzo Maffione ctx->error(ctx, "internal error");
1135c4f8d80SVincenzo Maffione }
1145c4f8d80SVincenzo Maffione }
1155c4f8d80SVincenzo Maffione
1165c4f8d80SVincenzo Maffione void *
nmctx_malloc(struct nmctx * ctx,size_t sz)1175c4f8d80SVincenzo Maffione nmctx_malloc(struct nmctx *ctx, size_t sz)
1185c4f8d80SVincenzo Maffione {
1195c4f8d80SVincenzo Maffione return ctx->malloc(ctx, sz);
1205c4f8d80SVincenzo Maffione }
1215c4f8d80SVincenzo Maffione
1225c4f8d80SVincenzo Maffione void
nmctx_free(struct nmctx * ctx,void * p)1235c4f8d80SVincenzo Maffione nmctx_free(struct nmctx *ctx, void *p)
1245c4f8d80SVincenzo Maffione {
1255c4f8d80SVincenzo Maffione ctx->free(ctx, p);
1265c4f8d80SVincenzo Maffione }
1275c4f8d80SVincenzo Maffione
1285c4f8d80SVincenzo Maffione void
nmctx_lock(struct nmctx * ctx)1295c4f8d80SVincenzo Maffione nmctx_lock(struct nmctx *ctx)
1305c4f8d80SVincenzo Maffione {
1315c4f8d80SVincenzo Maffione if (ctx->lock != NULL)
1325c4f8d80SVincenzo Maffione ctx->lock(ctx, 1);
1335c4f8d80SVincenzo Maffione }
1345c4f8d80SVincenzo Maffione
1355c4f8d80SVincenzo Maffione void
nmctx_unlock(struct nmctx * ctx)1365c4f8d80SVincenzo Maffione nmctx_unlock(struct nmctx *ctx)
1375c4f8d80SVincenzo Maffione {
1385c4f8d80SVincenzo Maffione if (ctx->lock != NULL)
1395c4f8d80SVincenzo Maffione ctx->lock(ctx, 0);
1405c4f8d80SVincenzo Maffione }
141