File:  [Qemu by Fabrice Bellard] / qemu / net / tap-solaris.c
Revision 1.1.1.1 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 17:42:33 2018 UTC (2 years, 3 months ago) by root
Branches: qemu, MAIN
CVS tags: qemu0125, qemu0124, qemu0123, qemu0122, qemu0121, qemu0120, HEAD
qemu 0.12.0

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

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