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