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