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 #include "qemu-error.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)
  60 {
  61     int tap_fd, if_fd, ppa = -1;
  62     static int ip_fd = 0;
  63     char *ptr;
  64
  65     static int arp_fd = 0;
  66     int ip_muxid, arp_muxid;
  67     struct strioctl  strioc_if, strioc_ppa;
  68     int link_type = I_PLINK;;
  69     struct lifreq ifr;
  70     char actual_name[32] = "";
  71
  72     memset(&ifr, 0x0, sizeof(ifr));
  73
  74     if( *dev ){
  75        ptr = dev;
  76        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
  77        ppa = atoi(ptr);
  78     }
  79
  80     /* Check if IP device was opened */
  81     if( ip_fd )
  82        close(ip_fd);
  83
  84     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
  85     if (ip_fd < 0) {
  86        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
  87        return -1;
  88     }
  89
  90     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
  91     if (tap_fd < 0) {
  92        syslog(LOG_ERR, "Can't open /dev/tap");
  93        return -1;
  94     }
  95
  96     /* Assign a new PPA and get its unit number. */
  97     strioc_ppa.ic_cmd = TUNNEWPPA;
  98     strioc_ppa.ic_timout = 0;
  99     strioc_ppa.ic_len = sizeof(ppa);
 100     strioc_ppa.ic_dp = (char *)&ppa;
 101     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
 102        syslog (LOG_ERR, "Can't assign new interface");
 103
 104     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
 105     if (if_fd < 0) {
 106        syslog(LOG_ERR, "Can't open /dev/tap (2)");
 107        return -1;
 108     }
 109     if(ioctl(if_fd, I_PUSH, "ip") < 0){
 110        syslog(LOG_ERR, "Can't push IP module");
 111        return -1;
 112     }
 113
 114     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
 115         syslog(LOG_ERR, "Can't get flags\n");
 116
 117     snprintf (actual_name, 32, "tap%d", ppa);
 118     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 119
 120     ifr.lifr_ppa = ppa;
 121     /* Assign ppa according to the unit number returned by tun device */
 122
 123     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
 124         syslog (LOG_ERR, "Can't set PPA %d", ppa);
 125     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
 126         syslog (LOG_ERR, "Can't get flags\n");
 127     /* Push arp module to if_fd */
 128     if (ioctl (if_fd, I_PUSH, "arp") < 0)
 129         syslog (LOG_ERR, "Can't push ARP module (2)");
 130
 131     /* Push arp module to ip_fd */
 132     if (ioctl (ip_fd, I_POP, NULL) < 0)
 133         syslog (LOG_ERR, "I_POP failed\n");
 134     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
 135         syslog (LOG_ERR, "Can't push ARP module (3)\n");
 136     /* Open arp_fd */
 137     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
 138     if (arp_fd < 0)
 139        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
 140
 141     /* Set ifname to arp */
 142     strioc_if.ic_cmd = SIOCSLIFNAME;
 143     strioc_if.ic_timout = 0;
 144     strioc_if.ic_len = sizeof(ifr);
 145     strioc_if.ic_dp = (char *)&ifr;
 146     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
 147         syslog (LOG_ERR, "Can't set ifname to arp\n");
 148     }
 149
 150     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
 151        syslog(LOG_ERR, "Can't link TAP device to IP");
 152        return -1;
 153     }
 154
 155     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
 156         syslog (LOG_ERR, "Can't link TAP device to ARP");
 157
 158     close (if_fd);
 159
 160     memset(&ifr, 0x0, sizeof(ifr));
 161     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 162     ifr.lifr_ip_muxid  = ip_muxid;
 163     ifr.lifr_arp_muxid = arp_muxid;
 164
 165     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
 166     {
 167       ioctl (ip_fd, I_PUNLINK , arp_muxid);
 168       ioctl (ip_fd, I_PUNLINK, ip_muxid);
 169       syslog (LOG_ERR, "Can't set multiplexor id");
 170     }
 171
 172     snprintf(dev, dev_size, "tap%d", ppa);
 173     return tap_fd;
 174 }
 175
 176 int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required)
 177 {
 178     char  dev[10]="";
 179     int fd;
 180     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
 181        fprintf(stderr, "Cannot allocate TAP device\n");
 182        return -1;
 183     }
 184     pstrcpy(ifname, ifname_size, dev);
 185     if (*vnet_hdr) {
 186         /* Solaris doesn't have IFF_VNET_HDR */
 187         *vnet_hdr = 0;
 188
 189         if (vnet_hdr_required && !*vnet_hdr) {
 190             error_report("vnet_hdr=1 requested, but no kernel "
 191                          "support for IFF_VNET_HDR available");
 192             close(fd);
 193             return -1;
 194         }
 195     }
 196     fcntl(fd, F_SETFL, O_NONBLOCK);
 197     return fd;
 198 }
 199
 200 int tap_set_sndbuf(int fd, QemuOpts *opts)
 201 {
 202     return 0;
 203 }
 204
 205 int tap_probe_vnet_hdr(int fd)
 206 {
 207     return 0;
 208 }
 209
 210 int tap_probe_has_ufo(int fd)
 211 {
 212     return 0;
 213 }
 214
 215 int tap_probe_vnet_hdr_len(int fd, int len)
 216 {
 217     return 0;
 218 }
 219
 220 void tap_fd_set_vnet_hdr_len(int fd, int len)
 221 {
 222 }
 223
 224 void tap_fd_set_offload(int fd, int csum, int tso4,
 225                         int tso6, int ecn, int ufo)
 226 {
 227 }