1 files changed, 102 insertions, 0 deletions
diff --git a/examples/ip_pipeline/tap.c b/examples/ip_pipeline/tap.c
new file mode 100644
index 00000000..11e4ad20
--- /dev/null
+++ b/examples/ip_pipeline/tap.c
@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2018 Intel Corporation
+ */
+
+#include <netinet/in.h>
+#ifdef RTE_EXEC_ENV_LINUXAPP
+#include <linux/if.h>
+#include <linux/if_tun.h>
+#endif
+#include <sys/ioctl.h>
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <rte_string_fns.h>
+
+#include "tap.h"
+
+#define TAP_DEV                                            "/dev/net/tun"
+
+static struct tap_list tap_list;
+
+int
+tap_init(void)
+{
+	TAILQ_INIT(&tap_list);
+
+	return 0;
+}
+
+struct tap *
+tap_find(const char *name)
+{
+	struct tap *tap;
+
+	if (name == NULL)
+		return NULL;
+
+	TAILQ_FOREACH(tap, &tap_list, node)
+		if (strcmp(tap->name, name) == 0)
+			return tap;
+
+	return NULL;
+}
+
+#ifndef RTE_EXEC_ENV_LINUXAPP
+
+struct tap *
+tap_create(const char *name __rte_unused)
+{
+	return NULL;
+}
+
+#else
+
+struct tap *
+tap_create(const char *name)
+{
+	struct tap *tap;
+	struct ifreq ifr;
+	int fd, status;
+
+	/* Check input params */
+	if ((name == NULL) ||
+		tap_find(name))
+		return NULL;
+
+	/* Resource create */
+	fd = open(TAP_DEV, O_RDWR | O_NONBLOCK);
+	if (fd < 0)
+		return NULL;
+
+	memset(&ifr, 0, sizeof(ifr));
+	ifr.ifr_flags = IFF_TAP | IFF_NO_PI; /* No packet information */
+	snprintf(ifr.ifr_name, IFNAMSIZ, "%s", name);
+
+	status = ioctl(fd, TUNSETIFF, (void *) &ifr);
+	if (status < 0) {
+		close(fd);
+		return NULL;
+	}
+
+	/* Node allocation */
+	tap = calloc(1, sizeof(struct tap));
+	if (tap == NULL) {
+		close(fd);
+		return NULL;
+	}
+	/* Node fill in */
+	strlcpy(tap->name, name, sizeof(tap->name));
+	tap->fd = fd;
+
+	/* Node add to list */
+	TAILQ_INSERT_TAIL(&tap_list, tap, node);
+
+	return tap;
+}
+
+#endif