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