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Commit | Line | Data |
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e7e92325 MM |
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 | ||
1422e32d | 25 | #include "tap_int.h" |
71f4effc | 26 | #include "qemu-common.h" |
9c17d615 | 27 | #include "sysemu/sysemu.h" |
1de7afc9 | 28 | #include "qemu/error-report.h" |
e7e92325 MM |
29 | |
30 | #ifdef __NetBSD__ | |
45c245bf MB |
31 | #include <sys/ioctl.h> |
32 | #include <net/if.h> | |
e7e92325 MM |
33 | #include <net/if_tap.h> |
34 | #endif | |
35 | ||
e7e92325 MM |
36 | int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required) |
37 | { | |
38 | int fd; | |
45c245bf MB |
39 | #ifdef TAPGIFNAME |
40 | struct ifreq ifr; | |
41 | #else | |
e7e92325 MM |
42 | char *dev; |
43 | struct stat s; | |
45c245bf | 44 | #endif |
e7e92325 | 45 | |
5f668643 B |
46 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) |
47 | /* if no ifname is given, always start the search from tap0/tun0. */ | |
2f859a3c JL |
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 { | |
5f668643 B |
55 | #if defined(__OpenBSD__) |
56 | snprintf(dname, sizeof dname, "/dev/tun%d", i); | |
57 | #else | |
2f859a3c | 58 | snprintf(dname, sizeof dname, "/dev/tap%d", i); |
5f668643 | 59 | #endif |
2f859a3c JL |
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) { | |
1ecda02b MA |
73 | error_report("warning: could not open %s (%s): no virtual network emulation", |
74 | dname, strerror(errno)); | |
2f859a3c JL |
75 | return -1; |
76 | } | |
77 | #else | |
e7e92325 MM |
78 | TFR(fd = open("/dev/tap", O_RDWR)); |
79 | if (fd < 0) { | |
45c245bf MB |
80 | fprintf(stderr, |
81 | "warning: could not open /dev/tap: no virtual network emulation: %s\n", | |
82 | strerror(errno)); | |
e7e92325 MM |
83 | return -1; |
84 | } | |
2f859a3c | 85 | #endif |
e7e92325 | 86 | |
45c245bf MB |
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 | } | |
e7e92325 MM |
101 | dev = devname(s.st_rdev, S_IFCHR); |
102 | pstrcpy(ifname, ifname_size, dev); | |
45c245bf | 103 | #endif |
e7e92325 | 104 | |
39ca4c08 JL |
105 | if (*vnet_hdr) { |
106 | /* BSD doesn't have IFF_VNET_HDR */ | |
107 | *vnet_hdr = 0; | |
108 | ||
109 | if (vnet_hdr_required && !*vnet_hdr) { | |
1ecda02b MA |
110 | error_report("vnet_hdr=1 requested, but no kernel " |
111 | "support for IFF_VNET_HDR available"); | |
39ca4c08 JL |
112 | close(fd); |
113 | return -1; | |
114 | } | |
115 | } | |
e7e92325 MM |
116 | fcntl(fd, F_SETFL, O_NONBLOCK); |
117 | return fd; | |
118 | } | |
15ac913b | 119 | |
08c573a8 | 120 | int tap_set_sndbuf(int fd, const NetdevTapOptions *tap) |
15ac913b MM |
121 | { |
122 | return 0; | |
123 | } | |
dc69004c MM |
124 | |
125 | int tap_probe_vnet_hdr(int fd) | |
126 | { | |
127 | return 0; | |
128 | } | |
1faac1f7 | 129 | |
9c282718 MM |
130 | int tap_probe_has_ufo(int fd) |
131 | { | |
132 | return 0; | |
133 | } | |
134 | ||
445d892f MT |
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 | ||
1faac1f7 MM |
144 | void tap_fd_set_offload(int fd, int csum, int tso4, |
145 | int tso6, int ecn, int ufo) | |
146 | { | |
147 | } |