Mark McLoughlin | e7e9232 | 2009-10-22 17:49:08 +0100 | [diff] [blame] | 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 | |
Paolo Bonzini | 1422e32 | 2012-10-24 08:43:34 +0200 | [diff] [blame] | 25 | #include "tap_int.h" |
Alexander Graf | 71f4eff | 2009-10-30 22:27:00 +0100 | [diff] [blame] | 26 | #include "qemu-common.h" |
Paolo Bonzini | 9c17d61 | 2012-12-17 18:20:04 +0100 | [diff] [blame^] | 27 | #include "sysemu/sysemu.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 28 | #include "qemu/error-report.h" |
Mark McLoughlin | e7e9232 | 2009-10-22 17:49:08 +0100 | [diff] [blame] | 29 | |
| 30 | #ifdef __NetBSD__ |
Manuel Bouyer | 45c245b | 2011-08-07 09:48:59 +0000 | [diff] [blame] | 31 | #include <sys/ioctl.h> |
| 32 | #include <net/if.h> |
Mark McLoughlin | e7e9232 | 2009-10-22 17:49:08 +0100 | [diff] [blame] | 33 | #include <net/if_tap.h> |
| 34 | #endif |
| 35 | |
Mark McLoughlin | e7e9232 | 2009-10-22 17:49:08 +0100 | [diff] [blame] | 36 | int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required) |
| 37 | { |
| 38 | int fd; |
Manuel Bouyer | 45c245b | 2011-08-07 09:48:59 +0000 | [diff] [blame] | 39 | #ifdef TAPGIFNAME |
| 40 | struct ifreq ifr; |
| 41 | #else |
Mark McLoughlin | e7e9232 | 2009-10-22 17:49:08 +0100 | [diff] [blame] | 42 | char *dev; |
| 43 | struct stat s; |
Manuel Bouyer | 45c245b | 2011-08-07 09:48:59 +0000 | [diff] [blame] | 44 | #endif |
Mark McLoughlin | e7e9232 | 2009-10-22 17:49:08 +0100 | [diff] [blame] | 45 | |
Brad | 5f66864 | 2010-12-20 21:23:15 -0500 | [diff] [blame] | 46 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) |
| 47 | /* if no ifname is given, always start the search from tap0/tun0. */ |
Juergen Lock | 2f859a3 | 2009-11-20 23:31:55 +0100 | [diff] [blame] | 48 | int i; |
| 49 | char dname[100]; |
| 50 | |
| 51 | for (i = 0; i < 10; i++) { |
| 52 | if (*ifname) { |
| 53 | snprintf(dname, sizeof dname, "/dev/%s", ifname); |
| 54 | } else { |
Brad | 5f66864 | 2010-12-20 21:23:15 -0500 | [diff] [blame] | 55 | #if defined(__OpenBSD__) |
| 56 | snprintf(dname, sizeof dname, "/dev/tun%d", i); |
| 57 | #else |
Juergen Lock | 2f859a3 | 2009-11-20 23:31:55 +0100 | [diff] [blame] | 58 | snprintf(dname, sizeof dname, "/dev/tap%d", i); |
Brad | 5f66864 | 2010-12-20 21:23:15 -0500 | [diff] [blame] | 59 | #endif |
Juergen Lock | 2f859a3 | 2009-11-20 23:31:55 +0100 | [diff] [blame] | 60 | } |
| 61 | TFR(fd = open(dname, O_RDWR)); |
| 62 | if (fd >= 0) { |
| 63 | break; |
| 64 | } |
| 65 | else if (errno == ENXIO || errno == ENOENT) { |
| 66 | break; |
| 67 | } |
| 68 | if (*ifname) { |
| 69 | break; |
| 70 | } |
| 71 | } |
| 72 | if (fd < 0) { |
Markus Armbruster | 1ecda02 | 2010-02-18 17:25:24 +0100 | [diff] [blame] | 73 | error_report("warning: could not open %s (%s): no virtual network emulation", |
| 74 | dname, strerror(errno)); |
Juergen Lock | 2f859a3 | 2009-11-20 23:31:55 +0100 | [diff] [blame] | 75 | return -1; |
| 76 | } |
| 77 | #else |
Mark McLoughlin | e7e9232 | 2009-10-22 17:49:08 +0100 | [diff] [blame] | 78 | TFR(fd = open("/dev/tap", O_RDWR)); |
| 79 | if (fd < 0) { |
Manuel Bouyer | 45c245b | 2011-08-07 09:48:59 +0000 | [diff] [blame] | 80 | fprintf(stderr, |
| 81 | "warning: could not open /dev/tap: no virtual network emulation: %s\n", |
| 82 | strerror(errno)); |
Mark McLoughlin | e7e9232 | 2009-10-22 17:49:08 +0100 | [diff] [blame] | 83 | return -1; |
| 84 | } |
Juergen Lock | 2f859a3 | 2009-11-20 23:31:55 +0100 | [diff] [blame] | 85 | #endif |
Mark McLoughlin | e7e9232 | 2009-10-22 17:49:08 +0100 | [diff] [blame] | 86 | |
Manuel Bouyer | 45c245b | 2011-08-07 09:48:59 +0000 | [diff] [blame] | 87 | #ifdef TAPGIFNAME |
| 88 | if (ioctl(fd, TAPGIFNAME, (void *)&ifr) < 0) { |
| 89 | fprintf(stderr, "warning: could not get tap name: %s\n", |
| 90 | strerror(errno)); |
| 91 | return -1; |
| 92 | } |
| 93 | pstrcpy(ifname, ifname_size, ifr.ifr_name); |
| 94 | #else |
| 95 | if (fstat(fd, &s) < 0) { |
| 96 | fprintf(stderr, |
| 97 | "warning: could not stat /dev/tap: no virtual network emulation: %s\n", |
| 98 | strerror(errno)); |
| 99 | return -1; |
| 100 | } |
Mark McLoughlin | e7e9232 | 2009-10-22 17:49:08 +0100 | [diff] [blame] | 101 | dev = devname(s.st_rdev, S_IFCHR); |
| 102 | pstrcpy(ifname, ifname_size, dev); |
Manuel Bouyer | 45c245b | 2011-08-07 09:48:59 +0000 | [diff] [blame] | 103 | #endif |
Mark McLoughlin | e7e9232 | 2009-10-22 17:49:08 +0100 | [diff] [blame] | 104 | |
Juergen Lock | 39ca4c0 | 2009-11-20 23:19:53 +0100 | [diff] [blame] | 105 | if (*vnet_hdr) { |
| 106 | /* BSD doesn't have IFF_VNET_HDR */ |
| 107 | *vnet_hdr = 0; |
| 108 | |
| 109 | if (vnet_hdr_required && !*vnet_hdr) { |
Markus Armbruster | 1ecda02 | 2010-02-18 17:25:24 +0100 | [diff] [blame] | 110 | error_report("vnet_hdr=1 requested, but no kernel " |
| 111 | "support for IFF_VNET_HDR available"); |
Juergen Lock | 39ca4c0 | 2009-11-20 23:19:53 +0100 | [diff] [blame] | 112 | close(fd); |
| 113 | return -1; |
| 114 | } |
| 115 | } |
Mark McLoughlin | e7e9232 | 2009-10-22 17:49:08 +0100 | [diff] [blame] | 116 | fcntl(fd, F_SETFL, O_NONBLOCK); |
| 117 | return fd; |
| 118 | } |
Mark McLoughlin | 15ac913 | 2009-10-22 17:49:13 +0100 | [diff] [blame] | 119 | |
Laszlo Ersek | 08c573a | 2012-07-17 16:17:19 +0200 | [diff] [blame] | 120 | int tap_set_sndbuf(int fd, const NetdevTapOptions *tap) |
Mark McLoughlin | 15ac913 | 2009-10-22 17:49:13 +0100 | [diff] [blame] | 121 | { |
| 122 | return 0; |
| 123 | } |
Mark McLoughlin | dc69004 | 2009-10-22 17:49:14 +0100 | [diff] [blame] | 124 | |
| 125 | int tap_probe_vnet_hdr(int fd) |
| 126 | { |
| 127 | return 0; |
| 128 | } |
Mark McLoughlin | 1faac1f | 2009-10-22 17:49:15 +0100 | [diff] [blame] | 129 | |
Mark McLoughlin | 9c28271 | 2009-10-22 17:49:16 +0100 | [diff] [blame] | 130 | int tap_probe_has_ufo(int fd) |
| 131 | { |
| 132 | return 0; |
| 133 | } |
| 134 | |
Michael S. Tsirkin | 445d892 | 2010-07-16 11:16:06 +0300 | [diff] [blame] | 135 | int tap_probe_vnet_hdr_len(int fd, int len) |
| 136 | { |
| 137 | return 0; |
| 138 | } |
| 139 | |
| 140 | void tap_fd_set_vnet_hdr_len(int fd, int len) |
| 141 | { |
| 142 | } |
| 143 | |
Mark McLoughlin | 1faac1f | 2009-10-22 17:49:15 +0100 | [diff] [blame] | 144 | void tap_fd_set_offload(int fd, int csum, int tso4, |
| 145 | int tso6, int ecn, int ufo) |
| 146 | { |
| 147 | } |