xref: /openbmc/qemu/net/tap-solaris.c (revision 7acafcfa) 
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 "qemu/osdep.h"
26 #include "qapi/error.h"
27 #include "tap_int.h"
28 #include "qemu/ctype.h"
29 #include "qemu/cutils.h"
30 #include "qemu-common.h"
31 
32 #include <sys/ethernet.h>
33 #include <sys/sockio.h>
34 #include <netinet/arp.h>
35 #include <netinet/in.h>
36 #include <netinet/in_systm.h>
37 #include <netinet/ip.h>
38 #include <netinet/ip_icmp.h> // must come after ip.h
39 #include <netinet/udp.h>
40 #include <netinet/tcp.h>
41 #include <net/if.h>
42 #include <stropts.h>
43 #include "qemu/error-report.h"
44 
45 ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
46 {
47     struct strbuf sbuf;
48     int f = 0;
49 
50     sbuf.maxlen = maxlen;
51     sbuf.buf = (char *)buf;
52 
53     return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
54 }
55 
56 #define TUNNEWPPA       (('T'<<16) | 0x0001)
57 /*
58  * Allocate TAP device, returns opened fd.
59  * Stores dev name in the first arg(must be large enough).
60  */
61 static int tap_alloc(char *dev, size_t dev_size, Error **errp)
62 {
63     /* FIXME leaks like a sieve on error paths */
64     /* FIXME suspicious: many errors are reported, then ignored */
65     int tap_fd, if_fd, ppa = -1;
66     static int ip_fd = 0;
67     char *ptr;
68 
69     static int arp_fd = 0;
70     int ip_muxid, arp_muxid;
71     struct strioctl  strioc_if, strioc_ppa;
72     int link_type = I_PLINK;
73     struct lifreq ifr;
74     char actual_name[32] = "";
75 
76     memset(&ifr, 0x0, sizeof(ifr));
77 
78     if( *dev ){
79        ptr = dev;
80        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
81        ppa = atoi(ptr);
82     }
83 
84     /* Check if IP device was opened */
85     if( ip_fd )
86        close(ip_fd);
87 
88     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
89     if (ip_fd < 0) {
90         error_setg(errp, "Can't open /dev/ip (actually /dev/udp)");
91         return -1;
92     }
93 
94     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
95     if (tap_fd < 0) {
96         error_setg(errp, "Can't open /dev/tap");
97         return -1;
98     }
99 
100     /* Assign a new PPA and get its unit number. */
101     strioc_ppa.ic_cmd = TUNNEWPPA;
102     strioc_ppa.ic_timout = 0;
103     strioc_ppa.ic_len = sizeof(ppa);
104     strioc_ppa.ic_dp = (char *)&ppa;
105     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
106         error_report("Can't assign new interface");
107 
108     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
109     if (if_fd < 0) {
110         error_setg(errp, "Can't open /dev/tap (2)");
111         return -1;
112     }
113     if(ioctl(if_fd, I_PUSH, "ip") < 0){
114         error_setg(errp, "Can't push IP module");
115         return -1;
116     }
117 
118     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
119         error_report("Can't get flags");
120 
121     snprintf (actual_name, 32, "tap%d", ppa);
122     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
123 
124     ifr.lifr_ppa = ppa;
125     /* Assign ppa according to the unit number returned by tun device */
126 
127     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
128         error_report("Can't set PPA %d", ppa);
129     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
130         error_report("Can't get flags");
131     /* Push arp module to if_fd */
132     if (ioctl (if_fd, I_PUSH, "arp") < 0)
133         error_report("Can't push ARP module (2)");
134 
135     /* Push arp module to ip_fd */
136     if (ioctl (ip_fd, I_POP, NULL) < 0)
137         error_report("I_POP failed");
138     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
139         error_report("Can't push ARP module (3)");
140     /* Open arp_fd */
141     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
142     if (arp_fd < 0)
143         error_report("Can't open %s", "/dev/tap");
144 
145     /* Set ifname to arp */
146     strioc_if.ic_cmd = SIOCSLIFNAME;
147     strioc_if.ic_timout = 0;
148     strioc_if.ic_len = sizeof(ifr);
149     strioc_if.ic_dp = (char *)&ifr;
150     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
151         error_report("Can't set ifname to arp");
152     }
153 
154     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
155         error_setg(errp, "Can't link TAP device to IP");
156         return -1;
157     }
158 
159     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
160         error_report("Can't link TAP device to ARP");
161 
162     close (if_fd);
163 
164     memset(&ifr, 0x0, sizeof(ifr));
165     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
166     ifr.lifr_ip_muxid  = ip_muxid;
167     ifr.lifr_arp_muxid = arp_muxid;
168 
169     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
170     {
171       ioctl (ip_fd, I_PUNLINK , arp_muxid);
172       ioctl (ip_fd, I_PUNLINK, ip_muxid);
173       error_report("Can't set multiplexor id");
174     }
175 
176     snprintf(dev, dev_size, "tap%d", ppa);
177     return tap_fd;
178 }
179 
180 int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
181              int vnet_hdr_required, int mq_required, Error **errp)
182 {
183     char  dev[10]="";
184     int fd;
185 
186     fd = tap_alloc(dev, sizeof(dev), errp);
187     if (fd < 0) {
188         return -1;
189     }
190     pstrcpy(ifname, ifname_size, dev);
191     if (*vnet_hdr) {
192         /* Solaris doesn't have IFF_VNET_HDR */
193         *vnet_hdr = 0;
194 
195         if (vnet_hdr_required && !*vnet_hdr) {
196             error_setg(errp, "vnet_hdr=1 requested, but no kernel "
197                        "support for IFF_VNET_HDR available");
198             close(fd);
199             return -1;
200         }
201     }
202     fcntl(fd, F_SETFL, O_NONBLOCK);
203     return fd;
204 }
205 
206 void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp)
207 {
208 }
209 
210 int tap_probe_vnet_hdr(int fd)
211 {
212     return 0;
213 }
214 
215 int tap_probe_has_ufo(int fd)
216 {
217     return 0;
218 }
219 
220 int tap_probe_vnet_hdr_len(int fd, int len)
221 {
222     return 0;
223 }
224 
225 void tap_fd_set_vnet_hdr_len(int fd, int len)
226 {
227 }
228 
229 int tap_fd_set_vnet_le(int fd, int is_le)
230 {
231     return -EINVAL;
232 }
233 
234 int tap_fd_set_vnet_be(int fd, int is_be)
235 {
236     return -EINVAL;
237 }
238 
239 void tap_fd_set_offload(int fd, int csum, int tso4,
240                         int tso6, int ecn, int ufo)
241 {
242 }
243 
244 int tap_fd_enable(int fd)
245 {
246     return -1;
247 }
248 
249 int tap_fd_disable(int fd)
250 {
251     return -1;
252 }
253 
254 int tap_fd_get_ifname(int fd, char *ifname)
255 {
256     return -1;
257 }
258