New upstream version 18.05

[deb_dpdk.git] / examples / ip_pipeline / tap.c

diff --git a/examples/ip_pipeline/tap.c b/examples/ip_pipeline/tap.c
new file mode 100644 (file)
index 0000000..11e4ad2
--- /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