qdev: remove baked in notion of aliases (v2)
[qemu.git] / net / tap-solaris.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 "net/tap.h"
26 #include "sysemu.h"
27
28 #include <sys/stat.h>
29 #include <sys/ethernet.h>
30 #include <sys/sockio.h>
31 #include <netinet/arp.h>
32 #include <netinet/in.h>
33 #include <netinet/in_systm.h>
34 #include <netinet/ip.h>
35 #include <netinet/ip_icmp.h> // must come after ip.h
36 #include <netinet/udp.h>
37 #include <netinet/tcp.h>
38 #include <net/if.h>
39 #include <syslog.h>
40 #include <stropts.h>
41 #include "qemu-error.h"
42
43 ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
44 {
45 struct strbuf sbuf;
46 int f = 0;
47
48 sbuf.maxlen = maxlen;
49 sbuf.buf = (char *)buf;
50
51 return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
52 }
53
54 #define TUNNEWPPA (('T'<<16) | 0x0001)
55 /*
56 * Allocate TAP device, returns opened fd.
57 * Stores dev name in the first arg(must be large enough).
58 */
59 static int tap_alloc(char *dev, size_t dev_size)
60 {
61 int tap_fd, if_fd, ppa = -1;
62 static int ip_fd = 0;
63 char *ptr;
64
65 static int arp_fd = 0;
66 int ip_muxid, arp_muxid;
67 struct strioctl strioc_if, strioc_ppa;
68 int link_type = I_PLINK;
69 struct lifreq ifr;
70 char actual_name[32] = "";
71
72 memset(&ifr, 0x0, sizeof(ifr));
73
74 if( *dev ){
75 ptr = dev;
76 while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
77 ppa = atoi(ptr);
78 }
79
80 /* Check if IP device was opened */
81 if( ip_fd )
82 close(ip_fd);
83
84 TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
85 if (ip_fd < 0) {
86 syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
87 return -1;
88 }
89
90 TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
91 if (tap_fd < 0) {
92 syslog(LOG_ERR, "Can't open /dev/tap");
93 return -1;
94 }
95
96 /* Assign a new PPA and get its unit number. */
97 strioc_ppa.ic_cmd = TUNNEWPPA;
98 strioc_ppa.ic_timout = 0;
99 strioc_ppa.ic_len = sizeof(ppa);
100 strioc_ppa.ic_dp = (char *)&ppa;
101 if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
102 syslog (LOG_ERR, "Can't assign new interface");
103
104 TFR(if_fd = open("/dev/tap", O_RDWR, 0));
105 if (if_fd < 0) {
106 syslog(LOG_ERR, "Can't open /dev/tap (2)");
107 return -1;
108 }
109 if(ioctl(if_fd, I_PUSH, "ip") < 0){
110 syslog(LOG_ERR, "Can't push IP module");
111 return -1;
112 }
113
114 if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
115 syslog(LOG_ERR, "Can't get flags\n");
116
117 snprintf (actual_name, 32, "tap%d", ppa);
118 pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
119
120 ifr.lifr_ppa = ppa;
121 /* Assign ppa according to the unit number returned by tun device */
122
123 if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
124 syslog (LOG_ERR, "Can't set PPA %d", ppa);
125 if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
126 syslog (LOG_ERR, "Can't get flags\n");
127 /* Push arp module to if_fd */
128 if (ioctl (if_fd, I_PUSH, "arp") < 0)
129 syslog (LOG_ERR, "Can't push ARP module (2)");
130
131 /* Push arp module to ip_fd */
132 if (ioctl (ip_fd, I_POP, NULL) < 0)
133 syslog (LOG_ERR, "I_POP failed\n");
134 if (ioctl (ip_fd, I_PUSH, "arp") < 0)
135 syslog (LOG_ERR, "Can't push ARP module (3)\n");
136 /* Open arp_fd */
137 TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
138 if (arp_fd < 0)
139 syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
140
141 /* Set ifname to arp */
142 strioc_if.ic_cmd = SIOCSLIFNAME;
143 strioc_if.ic_timout = 0;
144 strioc_if.ic_len = sizeof(ifr);
145 strioc_if.ic_dp = (char *)&ifr;
146 if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
147 syslog (LOG_ERR, "Can't set ifname to arp\n");
148 }
149
150 if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
151 syslog(LOG_ERR, "Can't link TAP device to IP");
152 return -1;
153 }
154
155 if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
156 syslog (LOG_ERR, "Can't link TAP device to ARP");
157
158 close (if_fd);
159
160 memset(&ifr, 0x0, sizeof(ifr));
161 pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
162 ifr.lifr_ip_muxid = ip_muxid;
163 ifr.lifr_arp_muxid = arp_muxid;
164
165 if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
166 {
167 ioctl (ip_fd, I_PUNLINK , arp_muxid);
168 ioctl (ip_fd, I_PUNLINK, ip_muxid);
169 syslog (LOG_ERR, "Can't set multiplexor id");
170 }
171
172 snprintf(dev, dev_size, "tap%d", ppa);
173 return tap_fd;
174 }
175
176 int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required)
177 {
178 char dev[10]="";
179 int fd;
180 if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
181 fprintf(stderr, "Cannot allocate TAP device\n");
182 return -1;
183 }
184 pstrcpy(ifname, ifname_size, dev);
185 if (*vnet_hdr) {
186 /* Solaris doesn't have IFF_VNET_HDR */
187 *vnet_hdr = 0;
188
189 if (vnet_hdr_required && !*vnet_hdr) {
190 error_report("vnet_hdr=1 requested, but no kernel "
191 "support for IFF_VNET_HDR available");
192 close(fd);
193 return -1;
194 }
195 }
196 fcntl(fd, F_SETFL, O_NONBLOCK);
197 return fd;
198 }
199
200 int tap_set_sndbuf(int fd, QemuOpts *opts)
201 {
202 return 0;
203 }
204
205 int tap_probe_vnet_hdr(int fd)
206 {
207 return 0;
208 }
209
210 int tap_probe_has_ufo(int fd)
211 {
212 return 0;
213 }
214
215 int tap_probe_vnet_hdr_len(int fd, int len)
216 {
217 return 0;
218 }
219
220 void tap_fd_set_vnet_hdr_len(int fd, int len)
221 {
222 }
223
224 void tap_fd_set_offload(int fd, int csum, int tso4,
225 int tso6, int ecn, int ufo)
226 {
227 }