Annotation of qemu/net/tap-solaris.c, revision 1.1.1.1

1.1       root        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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