1 /* 2 * QEMU System Emulator 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 #include "net/tap.h" 26 #incude "qemu-common.h" 27 28 #ifdef __NetBSD__ 29 #include <net/if_tap.h> 30 #endif 31 32 #if defined(__FreeBSD__) || defined(__DragonFly__) 33 #include <libutil.h> 34 #else 35 #include <util.h> 36 #endif 37 #elif defined (__GLIBC__) && defined (__FreeBSD_kernel__) 38 #include <freebsd/stdlib.h> 39 40 #if defined(__OpenBSD__) 41 #include <util.h> 42 #endif 43 44 int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required) 45 { 46 int fd; 47 char *dev; 48 struct stat s; 49 50 TFR(fd = open("/dev/tap", O_RDWR)); 51 if (fd < 0) { 52 fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n"); 53 return -1; 54 } 55 56 fstat(fd, &s); 57 dev = devname(s.st_rdev, S_IFCHR); 58 pstrcpy(ifname, ifname_size, dev); 59 60 fcntl(fd, F_SETFL, O_NONBLOCK); 61 return fd; 62 } 63 64 int tap_set_sndbuf(int fd, QemuOpts *opts) 65 { 66 return 0; 67 } 68