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 "qemu/osdep.h"
  26 #include "qapi/error.h"
  27 #include "tap_int.h"
  28 #include "qemu/ctype.h"
  29 #include "qemu/cutils.h"
  30
  31 #include <sys/ethernet.h>
  32 #include <sys/sockio.h>
  33 #include <netinet/arp.h>
  34 #include <netinet/in.h>
  35 #include <netinet/in_systm.h>
  36 #include <netinet/ip.h>
  37 #include <netinet/ip_icmp.h> // must come after ip.h
  38 #include <netinet/udp.h>
  39 #include <netinet/tcp.h>
  40 #include <net/if.h>
  41 #include <stropts.h>
  42 #include "qemu/error-report.h"
  43
  44 ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
  45 {
  46     struct strbuf sbuf;
  47     int f = 0;
  48
  49     sbuf.maxlen = maxlen;
  50     sbuf.buf = (char *)buf;
  51
  52     return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
  53 }
  54
  55 #define TUNNEWPPA       (('T'<<16) | 0x0001)
  56 /*
  57  * Allocate TAP device, returns opened fd.
  58  * Stores dev name in the first arg(must be large enough).
  59  */
  60 static int tap_alloc(char *dev, size_t dev_size, Error **errp)
  61 {
  62     /* FIXME leaks like a sieve on error paths */
  63     /* FIXME suspicious: many errors are reported, then ignored */
  64     int tap_fd, if_fd, ppa = -1;
  65     static int ip_fd = 0;
  66     char *ptr;
  67
  68     static int arp_fd = 0;
  69     int ip_muxid, arp_muxid;
  70     struct strioctl  strioc_if, strioc_ppa;
  71     int link_type = I_PLINK;
  72     struct lifreq ifr;
  73     char actual_name[32] = "";
  74
  75     memset(&ifr, 0x0, sizeof(ifr));
  76
  77     if( *dev ){
  78        ptr = dev;
  79        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
  80        ppa = atoi(ptr);
  81     }
  82
  83     /* Check if IP device was opened */
  84     if( ip_fd )
  85        close(ip_fd);
  86
  87     ip_fd = RETRY_ON_EINTR(open("/dev/udp", O_RDWR, 0));
  88     if (ip_fd < 0) {
  89         error_setg(errp, "Can't open /dev/ip (actually /dev/udp)");
  90         return -1;
  91     }
  92
  93     tap_fd = RETRY_ON_EINTR(open("/dev/tap", O_RDWR, 0));
  94     if (tap_fd < 0) {
  95         error_setg(errp, "Can't open /dev/tap");
  96         return -1;
  97     }
  98
  99     /* Assign a new PPA and get its unit number. */
 100     strioc_ppa.ic_cmd = TUNNEWPPA;
 101     strioc_ppa.ic_timout = 0;
 102     strioc_ppa.ic_len = sizeof(ppa);
 103     strioc_ppa.ic_dp = (char *)&ppa;
 104     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
 105         error_report("Can't assign new interface");
 106
 107     if_fd = RETRY_ON_EINTR(open("/dev/tap", O_RDWR, 0));
 108     if (if_fd < 0) {
 109         error_setg(errp, "Can't open /dev/tap (2)");
 110         return -1;
 111     }
 112     if(ioctl(if_fd, I_PUSH, "ip") < 0){
 113         error_setg(errp, "Can't push IP module");
 114         return -1;
 115     }
 116
 117     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
 118         error_report("Can't get flags");
 119
 120     snprintf (actual_name, 32, "tap%d", ppa);
 121     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 122
 123     ifr.lifr_ppa = ppa;
 124     /* Assign ppa according to the unit number returned by tun device */
 125
 126     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
 127         error_report("Can't set PPA %d", ppa);
 128     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
 129         error_report("Can't get flags");
 130     /* Push arp module to if_fd */
 131     if (ioctl (if_fd, I_PUSH, "arp") < 0)
 132         error_report("Can't push ARP module (2)");
 133
 134     /* Push arp module to ip_fd */
 135     if (ioctl (ip_fd, I_POP, NULL) < 0)
 136         error_report("I_POP failed");
 137     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
 138         error_report("Can't push ARP module (3)");
 139     /* Open arp_fd */
 140     arp_fd = RETRY_ON_EINTR(open("/dev/tap", O_RDWR, 0));
 141     if (arp_fd < 0)
 142         error_report("Can't open %s", "/dev/tap");
 143
 144     /* Set ifname to arp */
 145     strioc_if.ic_cmd = SIOCSLIFNAME;
 146     strioc_if.ic_timout = 0;
 147     strioc_if.ic_len = sizeof(ifr);
 148     strioc_if.ic_dp = (char *)&ifr;
 149     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
 150         error_report("Can't set ifname to arp");
 151     }
 152
 153     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
 154         error_setg(errp, "Can't link TAP device to IP");
 155         return -1;
 156     }
 157
 158     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
 159         error_report("Can't link TAP device to ARP");
 160
 161     close (if_fd);
 162
 163     memset(&ifr, 0x0, sizeof(ifr));
 164     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 165     ifr.lifr_ip_muxid  = ip_muxid;
 166     ifr.lifr_arp_muxid = arp_muxid;
 167
 168     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
 169     {
 170       ioctl (ip_fd, I_PUNLINK , arp_muxid);
 171       ioctl (ip_fd, I_PUNLINK, ip_muxid);
 172       error_report("Can't set multiplexor id");
 173     }
 174
 175     snprintf(dev, dev_size, "tap%d", ppa);
 176     return tap_fd;
 177 }
 178
 179 int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
 180              int vnet_hdr_required, int mq_required, Error **errp)
 181 {
 182     char  dev[10]="";
 183     int fd;
 184
 185     fd = tap_alloc(dev, sizeof(dev), errp);
 186     if (fd < 0) {
 187         return -1;
 188     }
 189     pstrcpy(ifname, ifname_size, dev);
 190     if (*vnet_hdr) {
 191         /* Solaris doesn't have IFF_VNET_HDR */
 192         *vnet_hdr = 0;
 193
 194         if (vnet_hdr_required && !*vnet_hdr) {
 195             error_setg(errp, "vnet_hdr=1 requested, but no kernel "
 196                        "support for IFF_VNET_HDR available");
 197             close(fd);
 198             return -1;
 199         }
 200     }
 201     g_unix_set_fd_nonblocking(fd, true, NULL);
 202     return fd;
 203 }
 204
 205 void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp)
 206 {
 207 }
 208
 209 int tap_probe_vnet_hdr(int fd, Error **errp)
 210 {
 211     return 0;
 212 }
 213
 214 int tap_probe_has_ufo(int fd)
 215 {
 216     return 0;
 217 }
 218
 219 int tap_probe_has_uso(int fd)
 220 {
 221     return 0;
 222 }
 223
 224 void tap_fd_set_vnet_hdr_len(int fd, int len)
 225 {
 226 }
 227
 228 int tap_fd_set_vnet_le(int fd, int is_le)
 229 {
 230     return -EINVAL;
 231 }
 232
 233 int tap_fd_set_vnet_be(int fd, int is_be)
 234 {
 235     return -EINVAL;
 236 }
 237
 238 void tap_fd_set_offload(int fd, int csum, int tso4,
 239                         int tso6, int ecn, int ufo, int uso4, int uso6)
 240 {
 241 }
 242
 243 int tap_fd_enable(int fd)
 244 {
 245     return -1;
 246 }
 247
 248 int tap_fd_disable(int fd)
 249 {
 250     return -1;
 251 }
 252
 253 int tap_fd_get_ifname(int fd, char *ifname)
 254 {
 255     return -1;
 256 }
 257
 258 int tap_fd_set_steering_ebpf(int fd, int prog_fd)
 259 {
 260     return -1;
 261 }