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 "net/tap.h"
  26 #include "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
  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)
  59 {
  60     int tap_fd, if_fd, ppa = -1;
  61     static int ip_fd = 0;
  62     char *ptr;
  63
  64     static int arp_fd = 0;
  65     int ip_muxid, arp_muxid;
  66     struct strioctl  strioc_if, strioc_ppa;
  67     int link_type = I_PLINK;;
  68     struct lifreq ifr;
  69     char actual_name[32] = "";
  70
  71     memset(&ifr, 0x0, sizeof(ifr));
  72
  73     if( *dev ){
  74        ptr = dev;
  75        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
  76        ppa = atoi(ptr);
  77     }
  78
  79     /* Check if IP device was opened */
  80     if( ip_fd )
  81        close(ip_fd);
  82
  83     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
  84     if (ip_fd < 0) {
  85        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
  86        return -1;
  87     }
  88
  89     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
  90     if (tap_fd < 0) {
  91        syslog(LOG_ERR, "Can't open /dev/tap");
  92        return -1;
  93     }
  94
  95     /* Assign a new PPA and get its unit number. */
  96     strioc_ppa.ic_cmd = TUNNEWPPA;
  97     strioc_ppa.ic_timout = 0;
  98     strioc_ppa.ic_len = sizeof(ppa);
  99     strioc_ppa.ic_dp = (char *)&ppa;
 100     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
 101        syslog (LOG_ERR, "Can't assign new interface");
 102
 103     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
 104     if (if_fd < 0) {
 105        syslog(LOG_ERR, "Can't open /dev/tap (2)");
 106        return -1;
 107     }
 108     if(ioctl(if_fd, I_PUSH, "ip") < 0){
 109        syslog(LOG_ERR, "Can't push IP module");
 110        return -1;
 111     }
 112
 113     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
 114         syslog(LOG_ERR, "Can't get flags\n");
 115
 116     snprintf (actual_name, 32, "tap%d", ppa);
 117     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 118
 119     ifr.lifr_ppa = ppa;
 120     /* Assign ppa according to the unit number returned by tun device */
 121
 122     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
 123         syslog (LOG_ERR, "Can't set PPA %d", ppa);
 124     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
 125         syslog (LOG_ERR, "Can't get flags\n");
 126     /* Push arp module to if_fd */
 127     if (ioctl (if_fd, I_PUSH, "arp") < 0)
 128         syslog (LOG_ERR, "Can't push ARP module (2)");
 129
 130     /* Push arp module to ip_fd */
 131     if (ioctl (ip_fd, I_POP, NULL) < 0)
 132         syslog (LOG_ERR, "I_POP failed\n");
 133     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
 134         syslog (LOG_ERR, "Can't push ARP module (3)\n");
 135     /* Open arp_fd */
 136     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
 137     if (arp_fd < 0)
 138        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
 139
 140     /* Set ifname to arp */
 141     strioc_if.ic_cmd = SIOCSLIFNAME;
 142     strioc_if.ic_timout = 0;
 143     strioc_if.ic_len = sizeof(ifr);
 144     strioc_if.ic_dp = (char *)&ifr;
 145     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
 146         syslog (LOG_ERR, "Can't set ifname to arp\n");
 147     }
 148
 149     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
 150        syslog(LOG_ERR, "Can't link TAP device to IP");
 151        return -1;
 152     }
 153
 154     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
 155         syslog (LOG_ERR, "Can't link TAP device to ARP");
 156
 157     close (if_fd);
 158
 159     memset(&ifr, 0x0, sizeof(ifr));
 160     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 161     ifr.lifr_ip_muxid  = ip_muxid;
 162     ifr.lifr_arp_muxid = arp_muxid;
 163
 164     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
 165     {
 166       ioctl (ip_fd, I_PUNLINK , arp_muxid);
 167       ioctl (ip_fd, I_PUNLINK, ip_muxid);
 168       syslog (LOG_ERR, "Can't set multiplexor id");
 169     }
 170
 171     snprintf(dev, dev_size, "tap%d", ppa);
 172     return tap_fd;
 173 }
 174
 175 int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required)
 176 {
 177     char  dev[10]="";
 178     int fd;
 179     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
 180        fprintf(stderr, "Cannot allocate TAP device\n");
 181        return -1;
 182     }
 183     pstrcpy(ifname, ifname_size, dev);
 184     if (*vnet_hdr) {
 185         /* Solaris doesn't have IFF_VNET_HDR */
 186         *vnet_hdr = 0;
 187
 188         if (vnet_hdr_required && !*vnet_hdr) {
 189             qemu_error("vnet_hdr=1 requested, but no kernel "
 190                        "support for IFF_VNET_HDR available");
 191             close(fd);
 192             return -1;
 193         }
 194     }
 195     fcntl(fd, F_SETFL, O_NONBLOCK);
 196     return fd;
 197 }
 198
 199 int tap_set_sndbuf(int fd, QemuOpts *opts)
 200 {
 201     return 0;
 202 }
 203
 204 int tap_probe_vnet_hdr(int fd)
 205 {
 206     return 0;
 207 }
 208
 209 int tap_probe_has_ufo(int fd)
 210 {
 211     return 0;
 212 }
 213
 214 void tap_fd_set_offload(int fd, int csum, int tso4,
 215                         int tso6, int ecn, int ufo)
 216 {
 217 }