xref: /openbmc/qemu/net/tap-solaris.c (revision 3588185b)
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 "sysemu/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-report.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, const NetdevTapOptions *tap)
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 }
228