mirror of https://github.com/dswd/vpncloud.git
28 lines
775 B
C
28 lines
775 B
C
// VpnCloud - Peer-to-Peer VPN
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// Copyright (C) 2015-2017 Dennis Schwerdel
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// This software is licensed under GPL-3 or newer (see LICENSE.md)
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#include <stdint.h>
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#include <net/if.h>
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#include <linux/if_tun.h>
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#include <string.h>
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#include <sys/ioctl.h>
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int32_t setup_device(int32_t fd, char *ifname, int32_t flags) {
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struct ifreq ifr;
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memset(&ifr, 0, sizeof(ifr));
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ifr.ifr_flags = flags;
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strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
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if (ioctl(fd, TUNSETIFF, (void *)&ifr) < 0) return 1;
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strncpy(ifname, ifr.ifr_name, IFNAMSIZ);
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return 0;
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}
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int32_t setup_tap_device(int32_t fd, char *ifname) {
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return setup_device(fd, ifname, IFF_TAP | IFF_NO_PI);
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}
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int32_t setup_tun_device(int32_t fd, char *ifname) {
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return setup_device(fd, ifname, IFF_TUN | IFF_NO_PI);
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}
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