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 #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, Error **errp)
 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 }