mips: Set the CP0.Config3.DSP and CP0.Config3.DSP2P bits
[qemu.git] / net / tap-bsd.c
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 "tap_int.h"
26 #include "qemu-common.h"
27 #include "sysemu/sysemu.h"
28 #include "qemu/error-report.h"
29
30 #if defined(__NetBSD__) || defined(__FreeBSD__)
31 #include <sys/ioctl.h>
32 #include <net/if.h>
33 #include <net/if_tap.h>
34 #endif
35
36 #ifndef __FreeBSD__
37 int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
38 int vnet_hdr_required, int mq_required)
39 {
40 int fd;
41 #ifdef TAPGIFNAME
42 struct ifreq ifr;
43 #else
44 char *dev;
45 struct stat s;
46 #endif
47
48 /* if no ifname is given, always start the search from tap0/tun0. */
49 int i;
50 char dname[100];
51
52 for (i = 0; i < 10; i++) {
53 if (*ifname) {
54 snprintf(dname, sizeof dname, "/dev/%s", ifname);
55 } else {
56 #if defined(__OpenBSD__)
57 snprintf(dname, sizeof dname, "/dev/tun%d", i);
58 #else
59 snprintf(dname, sizeof dname, "/dev/tap%d", i);
60 #endif
61 }
62 TFR(fd = open(dname, O_RDWR));
63 if (fd >= 0) {
64 break;
65 }
66 else if (errno == ENXIO || errno == ENOENT) {
67 break;
68 }
69 if (*ifname) {
70 break;
71 }
72 }
73 if (fd < 0) {
74 error_report("warning: could not open %s (%s): no virtual network emulation",
75 dname, strerror(errno));
76 return -1;
77 }
78
79 #ifdef TAPGIFNAME
80 if (ioctl(fd, TAPGIFNAME, (void *)&ifr) < 0) {
81 fprintf(stderr, "warning: could not get tap name: %s\n",
82 strerror(errno));
83 return -1;
84 }
85 pstrcpy(ifname, ifname_size, ifr.ifr_name);
86 #else
87 if (fstat(fd, &s) < 0) {
88 fprintf(stderr,
89 "warning: could not stat /dev/tap: no virtual network emulation: %s\n",
90 strerror(errno));
91 return -1;
92 }
93 dev = devname(s.st_rdev, S_IFCHR);
94 pstrcpy(ifname, ifname_size, dev);
95 #endif
96
97 if (*vnet_hdr) {
98 /* BSD doesn't have IFF_VNET_HDR */
99 *vnet_hdr = 0;
100
101 if (vnet_hdr_required && !*vnet_hdr) {
102 error_report("vnet_hdr=1 requested, but no kernel "
103 "support for IFF_VNET_HDR available");
104 close(fd);
105 return -1;
106 }
107 }
108 fcntl(fd, F_SETFL, O_NONBLOCK);
109 return fd;
110 }
111
112 #else /* __FreeBSD__ */
113
114 #define PATH_NET_TAP "/dev/tap"
115
116 int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
117 int vnet_hdr_required, int mq_required)
118 {
119 int fd, s, ret;
120 struct ifreq ifr;
121
122 TFR(fd = open(PATH_NET_TAP, O_RDWR));
123 if (fd < 0) {
124 error_report("could not open %s: %s", PATH_NET_TAP, strerror(errno));
125 return -1;
126 }
127
128 memset(&ifr, 0, sizeof(ifr));
129
130 ret = ioctl(fd, TAPGIFNAME, (void *)&ifr);
131 if (ret < 0) {
132 error_report("could not get tap interface name");
133 goto error;
134 }
135
136 if (ifname[0] != '\0') {
137 /* User requested the interface to have a specific name */
138 s = socket(AF_LOCAL, SOCK_DGRAM, 0);
139 if (s < 0) {
140 error_report("could not open socket to set interface name");
141 goto error;
142 }
143 ifr.ifr_data = ifname;
144 ret = ioctl(s, SIOCSIFNAME, (void *)&ifr);
145 close(s);
146 if (ret < 0) {
147 error_report("could not set tap interface name");
148 goto error;
149 }
150 } else {
151 pstrcpy(ifname, ifname_size, ifr.ifr_name);
152 }
153
154 if (*vnet_hdr) {
155 /* BSD doesn't have IFF_VNET_HDR */
156 *vnet_hdr = 0;
157
158 if (vnet_hdr_required && !*vnet_hdr) {
159 error_report("vnet_hdr=1 requested, but no kernel "
160 "support for IFF_VNET_HDR available");
161 goto error;
162 }
163 }
164 if (mq_required) {
165 error_report("mq_required requested, but not kernel support"
166 "for IFF_MULTI_QUEUE available");
167 goto error;
168 }
169
170 fcntl(fd, F_SETFL, O_NONBLOCK);
171 return fd;
172
173 error:
174 close(fd);
175 return -1;
176 }
177 #endif /* __FreeBSD__ */
178
179 int tap_set_sndbuf(int fd, const NetdevTapOptions *tap)
180 {
181 return 0;
182 }
183
184 int tap_probe_vnet_hdr(int fd)
185 {
186 return 0;
187 }
188
189 int tap_probe_has_ufo(int fd)
190 {
191 return 0;
192 }
193
194 int tap_probe_vnet_hdr_len(int fd, int len)
195 {
196 return 0;
197 }
198
199 void tap_fd_set_vnet_hdr_len(int fd, int len)
200 {
201 }
202
203 void tap_fd_set_offload(int fd, int csum, int tso4,
204 int tso6, int ecn, int ufo)
205 {
206 }
207
208 int tap_fd_enable(int fd)
209 {
210 return -1;
211 }
212
213 int tap_fd_disable(int fd)
214 {
215 return -1;
216 }
217
218 int tap_fd_get_ifname(int fd, char *ifname)
219 {
220 return -1;
221 }