Annotation of qemu/net/tap-solaris.c, revision 1.1.1.3

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"
1.1.1.2   root       26: #include "sysemu.h"
1.1       root       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>
1.1.1.3 ! root       41: #include "qemu-error.h"
1.1       root       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) {
1.1.1.2   root      190:             error_report("vnet_hdr=1 requested, but no kernel "
                    191:                          "support for IFF_VNET_HDR available");
1.1       root      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: 
1.1.1.3 ! root      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: 
1.1       root      224: void tap_fd_set_offload(int fd, int csum, int tso4,
                    225:                         int tso6, int ecn, int ufo)
                    226: {
                    227: }

unix.superglobalmegacorp.com