LXR dpdk/drivers/net/softnic/rte_eth_softnic

   1/* SPDX-License-Identifier: BSD-3-Clause
   2 * Copyright(c) 2010-2018 Intel Corporation
   3 */
   4
   5#include <netinet/in.h>
   6#ifdef RTE_EXEC_ENV_LINUX
   7#include <linux/if.h>
   8#include <linux/if_tun.h>
   9#endif
  10#include <sys/ioctl.h>
  11
  12#include <fcntl.h>
  13#include <stdio.h>
  14#include <stdlib.h>
  15#include <string.h>
  16#include <unistd.h>
  17
  18#include <rte_string_fns.h>
  19
  20#include "rte_eth_softnic_internals.h"
  21
  22#define TAP_DEV                                            "/dev/net/tun"
  23
  24int
  25softnic_tap_init(struct pmd_internals *p)
  26{
  27        TAILQ_INIT(&p->tap_list);
  28
  29        return 0;
  30}
  31
  32void
  33softnic_tap_free(struct pmd_internals *p)
  34{
  35        for ( ; ; ) {
  36                struct softnic_tap *tap;
  37
  38                tap = TAILQ_FIRST(&p->tap_list);
  39                if (tap == NULL)
  40                        break;
  41
  42                TAILQ_REMOVE(&p->tap_list, tap, node);
  43                free(tap);
  44        }
  45}
  46
  47struct softnic_tap *
  48softnic_tap_find(struct pmd_internals *p,
  49        const char *name)
  50{
  51        struct softnic_tap *tap;
  52
  53        if (name == NULL)
  54                return NULL;
  55
  56        TAILQ_FOREACH(tap, &p->tap_list, node)
  57                if (strcmp(tap->name, name) == 0)
  58                        return tap;
  59
  60        return NULL;
  61}
  62
  63#ifndef RTE_EXEC_ENV_LINUX
  64
  65struct softnic_tap *
  66softnic_tap_create(struct pmd_internals *p __rte_unused,
  67        const char *name __rte_unused)
  68{
  69        return NULL;
  70}
  71
  72#else
  73
  74struct softnic_tap *
  75softnic_tap_create(struct pmd_internals *p,
  76        const char *name)
  77{
  78        struct softnic_tap *tap;
  79        struct ifreq ifr;
  80        int fd, status;
  81
  82        /* Check input params */
  83        if (name == NULL ||
  84                softnic_tap_find(p, name))
  85                return NULL;
  86
  87        /* Resource create */
  88        fd = open(TAP_DEV, O_RDWR | O_NONBLOCK);
  89        if (fd < 0)
  90                return NULL;
  91
  92        memset(&ifr, 0, sizeof(ifr));
  93        ifr.ifr_flags = IFF_TAP | IFF_NO_PI; /* No packet information */
  94        strlcpy(ifr.ifr_name, name, IFNAMSIZ);
  95
  96        status = ioctl(fd, TUNSETIFF, (void *)&ifr);
  97        if (status < 0) {
  98                close(fd);
  99                return NULL;
 100        }
 101
 102        /* Node allocation */
 103        tap = calloc(1, sizeof(struct softnic_tap));
 104        if (tap == NULL) {
 105                close(fd);
 106                return NULL;
 107        }
 108        /* Node fill in */
 109        strlcpy(tap->name, name, sizeof(tap->name));
 110        tap->fd = fd;
 111
 112        /* Node add to list */
 113        TAILQ_INSERT_TAIL(&p->tap_list, tap, node);
 114
 115        return tap;
 116}
 117
 118#endif
 119