diff options
Diffstat (limited to 'libdvdcss/bsdi_ioctl.c')
| -rw-r--r-- | libdvdcss/bsdi_ioctl.c | 770 |
1 files changed, 770 insertions, 0 deletions
diff --git a/libdvdcss/bsdi_ioctl.c b/libdvdcss/bsdi_ioctl.c new file mode 100644 index 0000000000..ef4c56c30e --- /dev/null +++ b/libdvdcss/bsdi_ioctl.c @@ -0,0 +1,770 @@ +#include "config.h" + +/* + * Hacked version of the linux cdrom.c kernel module - everything except the + * DVD handling ripped out and the rest rewritten to use raw SCSI commands + * on BSD/OS 4.2 (but should work with earlier versions as well). +*/ + +#include <sys/types.h> +#include <stdlib.h> +#include <stdio.h> +#include <errno.h> +#include <unistd.h> +#include <sys/ioctl.h> +#include </sys/dev/scsi/scsi.h> +#include </sys/dev/scsi/scsi_ioctl.h> + +#include "bsdi_dvd.h" + +/* + * Now get rid of the override/intercept macro so we can call the real ioctl() + * routine! +*/ +#undef ioctl + +#define CMD_READ_10 0x28 +#define CMD_READ_TOC_PMA_ATIP 0x43 +#define CMD_READ_CD 0xbe +#define CMD_START_STOP_UNIT 0x1b + +#define CMD_SEND_KEY 0xa3 +#define CMD_REPORT_KEY 0xa4 +#define CMD_READ_DVD_STRUCTURE 0xad + +#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key)) +#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge)) + +/* Define the Cdrom Generic Command structure */ +typedef struct cgc + { + u_char cdb[12]; + u_char *buf; + int buflen; + int rw; + int timeout; + scsi_user_sense_t *sus; + } cgc_t; + +static int scsi_cmd(int, cgc_t *); +static int cdrom_ioctl(int, u_long, void *); +static int cdrom_tray_move(int, int); +static void cdrom_count_tracks(int, tracktype *); +static int dvd_ioctl(int, u_long, void *); +static int debug = 0; + +void dvd_cdrom_debug(int flag) + { + debug = flag; + } + +/* + * This is the published entry point. Actually applications should simply + * include <dvd.h> and not refer to this at all. +*/ +int dvd_cdrom_ioctl(int fd, unsigned long cmd, void *arg) + { + switch (cmd) + { + case DVD_AUTH: + case DVD_READ_STRUCT: + return(dvd_ioctl(fd, cmd, arg)); + case CDROMREADTOCHDR: + case CDROMREADTOCENTRY: + case CDROMEJECT: + case CDROMREADRAW: + case CDROMREADMODE1: + case CDROMREADMODE2: + case CDROMCLOSETRAY: + case CDROM_DRIVE_STATUS: + case CDROM_DISC_STATUS: + return(cdrom_ioctl(fd, cmd, arg)); + default: + return(ioctl(fd, cmd, arg)); + } + } + +static void setup_report_key(cgc_t *cgc, u_int agid, u_int type) + { + + cgc->cdb[0] = CMD_REPORT_KEY; + cgc->cdb[10] = type | (agid << 6); + switch (type) + { + case 0: + case 5: + case 8: + cgc->buflen = 8; + break; + case 1: + cgc->buflen = 16; + break; + case 2: + case 4: + cgc->buflen = 12; + break; + } + cgc->cdb[9] = cgc->buflen; + cgc->rw = SUC_READ;; + } + +static void setup_send_key(cgc_t *cgc, u_int agid, u_int type) + { + + cgc->cdb[0] = CMD_SEND_KEY; + cgc->cdb[10] = type | (agid << 6); + switch (type) + { + case 1: + cgc->buflen = 16; + break; + case 3: + cgc->buflen = 12; + break; + case 6: + cgc->buflen = 8; + break; + } + cgc->cdb[9] = cgc->buflen; + cgc->rw = SUC_WRITE; + } + +static void cgc_init(cgc_t *cgc, void *buf, int len, int type) + { + + memset(cgc, 0, sizeof (*cgc)); + if (buf) + memset(buf, 0, len); + cgc->buf = (u_char *)buf; + cgc->buflen = len; + cgc->rw = type; + cgc->timeout = 5; /* 5 second timeout */ + } + +static int dvd_do_auth(int fd, dvd_authinfo *ai) + { + int ret; + u_char buf[20]; + cgc_t cgc; + rpc_state_t rpc_state; + + memset(buf, 0, sizeof(buf)); + cgc_init(&cgc, buf, 0, SUC_READ); + + switch (ai->type) + { + case DVD_LU_SEND_AGID: /* LU data send */ + setup_report_key(&cgc, ai->lsa.agid, 0); + if (ret = scsi_cmd(fd, &cgc)) + return ret; + ai->lsa.agid = buf[7] >> 6; + break; + case DVD_LU_SEND_KEY1: + setup_report_key(&cgc, ai->lsk.agid, 2); + if (ret = scsi_cmd(fd, &cgc)) + return ret; + copy_key(ai->lsk.key, &buf[4]); + break; + case DVD_LU_SEND_CHALLENGE: + setup_report_key(&cgc, ai->lsc.agid, 1); + if (ret = scsi_cmd(fd, &cgc)) + return ret; + copy_chal(ai->lsc.chal, &buf[4]); + break; + case DVD_LU_SEND_TITLE_KEY: /* Post-auth key */ + setup_report_key(&cgc, ai->lstk.agid, 4); + cgc.cdb[5] = ai->lstk.lba; + cgc.cdb[4] = ai->lstk.lba >> 8; + cgc.cdb[3] = ai->lstk.lba >> 16; + cgc.cdb[2] = ai->lstk.lba >> 24; + if (ret = scsi_cmd(fd, &cgc)) + return ret; + ai->lstk.cpm = (buf[4] >> 7) & 1; + ai->lstk.cp_sec = (buf[4] >> 6) & 1; + ai->lstk.cgms = (buf[4] >> 4) & 3; + copy_key(ai->lstk.title_key, &buf[5]); + break; + case DVD_LU_SEND_ASF: + setup_report_key(&cgc, ai->lsasf.agid, 5); + if (ret = scsi_cmd(fd, &cgc)) + return ret; + ai->lsasf.asf = buf[7] & 1; + break; + case DVD_HOST_SEND_CHALLENGE: /* LU data receive (LU changes state) */ + setup_send_key(&cgc, ai->hsc.agid, 1); + buf[1] = 0xe; + copy_chal(&buf[4], ai->hsc.chal); + if (ret = scsi_cmd(fd, &cgc)) + return ret; + ai->type = DVD_LU_SEND_KEY1; + break; + case DVD_HOST_SEND_KEY2: + setup_send_key(&cgc, ai->hsk.agid, 3); + buf[1] = 0xa; + copy_key(&buf[4], ai->hsk.key); + if (ret = scsi_cmd(fd, &cgc)) + { + ai->type = DVD_AUTH_FAILURE; + return ret; + } + ai->type = DVD_AUTH_ESTABLISHED; + break; + case DVD_INVALIDATE_AGID: + setup_report_key(&cgc, ai->lsa.agid, 0x3f); + if (ret = scsi_cmd(fd, &cgc)) + return ret; + break; + case DVD_LU_SEND_RPC_STATE: /* Get region settings */ + setup_report_key(&cgc, 0, 8); + memset(&rpc_state, 0, sizeof(rpc_state_t)); + cgc.buf = (char *) &rpc_state; + if (ret = scsi_cmd(fd, &cgc)) + { + ai->lrpcs.type = 0; + ai->lrpcs.rpc_scheme = 0; + } + else + { + ai->lrpcs.type = rpc_state.type_code; + ai->lrpcs.vra = rpc_state.vra; + ai->lrpcs.ucca = rpc_state.ucca; + ai->lrpcs.region_mask = rpc_state.region_mask; + ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme; + } + break; + case DVD_HOST_SEND_RPC_STATE: /* Set region settings */ + setup_send_key(&cgc, 0, 6); + buf[1] = 6; + buf[4] = ai->hrpcs.pdrc; + if (ret = scsi_cmd(fd, &cgc)) + return ret; + break; + default: + return EINVAL; + } + return 0; + } + +static int dvd_read_physical(int fd, dvd_struct *s) + { + int ret, i; + u_char buf[4 + 4 * 20], *base; + struct dvd_layer *layer; + cgc_t cgc; + + cgc_init(&cgc, buf, sizeof(buf), SUC_READ); + cgc.cdb[0] = CMD_READ_DVD_STRUCTURE; + cgc.cdb[6] = s->physical.layer_num; + cgc.cdb[7] = s->type; + cgc.cdb[9] = cgc.buflen & 0xff; + + if (ret = scsi_cmd(fd, &cgc)) + return ret; + + base = &buf[4]; + layer = &s->physical.layer[0]; + + /* place the data... really ugly, but at least we won't have to + worry about endianess in userspace or here. */ + for (i = 0; i < 4; ++i, base += 20, ++layer) + { + memset(layer, 0, sizeof(*layer)); + layer->book_version = base[0] & 0xf; + layer->book_type = base[0] >> 4; + layer->min_rate = base[1] & 0xf; + layer->disc_size = base[1] >> 4; + layer->layer_type = base[2] & 0xf; + layer->track_path = (base[2] >> 4) & 1; + layer->nlayers = (base[2] >> 5) & 3; + layer->track_density = base[3] & 0xf; + layer->linear_density = base[3] >> 4; + layer->start_sector = base[5] << 16 | base[6] << 8 | base[7]; + layer->end_sector = base[9] << 16 | base[10] << 8 | base[11]; + layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15]; + layer->bca = base[16] >> 7; + } + return 0; + } + +static int dvd_read_copyright(int fd, dvd_struct *s) + { + int ret; + u_char buf[8]; + cgc_t cgc; + + cgc_init(&cgc, buf, sizeof(buf), SUC_READ); + cgc.cdb[0] = CMD_READ_DVD_STRUCTURE; + cgc.cdb[6] = s->copyright.layer_num; + cgc.cdb[7] = s->type; + cgc.cdb[8] = cgc.buflen >> 8; + cgc.cdb[9] = cgc.buflen & 0xff; + + if (ret = scsi_cmd(fd, &cgc)) + return ret; + s->copyright.cpst = buf[4]; + s->copyright.rmi = buf[5]; + return 0; + } + +static int dvd_read_disckey(int fd, dvd_struct *s) + { + int ret, size; + u_char *buf; + cgc_t cgc; + + size = sizeof(s->disckey.value) + 4; + + if ((buf = (u_char *) malloc(size)) == NULL) + return ENOMEM; + + cgc_init(&cgc, buf, size, SUC_READ); + cgc.cdb[0] = CMD_READ_DVD_STRUCTURE; + cgc.cdb[7] = s->type; + cgc.cdb[8] = size >> 8; + cgc.cdb[9] = size & 0xff; + cgc.cdb[10] = s->disckey.agid << 6; + + if (!(ret = scsi_cmd(fd, &cgc))) + memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value)); + free(buf); + return ret; + } + +static int dvd_read_bca(int fd, dvd_struct *s) + { + int ret; + u_char buf[4 + 188]; + cgc_t cgc; + + cgc_init(&cgc, buf, sizeof(buf), SUC_READ); + cgc.cdb[0] = CMD_READ_DVD_STRUCTURE; + cgc.cdb[7] = s->type; + cgc.cdb[9] = cgc.buflen = 0xff; + + if (ret = scsi_cmd(fd, &cgc)) + return ret; + s->bca.len = buf[0] << 8 | buf[1]; + if (s->bca.len < 12 || s->bca.len > 188) + return EIO; + memcpy(s->bca.value, &buf[4], s->bca.len); + return 0; + } + +static int dvd_read_manufact(int fd, dvd_struct *s) + { + int ret = 0, size; + u_char *buf; + cgc_t cgc; + + size = sizeof(s->manufact.value) + 4; + + if ((buf = (u_char *) malloc(size)) == NULL) + return ENOMEM; + + cgc_init(&cgc, buf, size, SUC_READ); + cgc.cdb[0] = CMD_READ_DVD_STRUCTURE; + cgc.cdb[7] = s->type; + cgc.cdb[8] = size >> 8; + cgc.cdb[9] = size & 0xff; + + if (ret = scsi_cmd(fd, &cgc)) + { + free(buf); + return ret; + } + s->manufact.len = buf[0] << 8 | buf[1]; + if (s->manufact.len < 0 || s->manufact.len > 2048) + ret = -EIO; + else + memcpy(s->manufact.value, &buf[4], s->manufact.len); + free(buf); + return ret; + } + +static int dvd_read_struct(int fd, dvd_struct *s) + { + switch (s->type) + { + case DVD_STRUCT_PHYSICAL: + return dvd_read_physical(fd, s); + case DVD_STRUCT_COPYRIGHT: + return dvd_read_copyright(fd, s); + case DVD_STRUCT_DISCKEY: + return dvd_read_disckey(fd, s); + case DVD_STRUCT_BCA: + return dvd_read_bca(fd, s); + case DVD_STRUCT_MANUFACT: + return dvd_read_manufact(fd, s); + default: + return EINVAL; + } + } + +static u_char scsi_cdblen[8] = {6, 10, 10, 12, 12, 12, 10, 10}; + +static int scsi_cmd(int fd, cgc_t *cgc) + { + int i, scsistatus, cdblen; + unsigned char *cp; + struct scsi_user_cdb suc; + + /* safety checks */ + if (cgc->rw != SUC_READ && cgc->rw != SUC_WRITE) + return(EINVAL); + + suc.suc_flags = cgc->rw; + cdblen = scsi_cdblen[(cgc->cdb[0] >> 5) & 7]; + suc.suc_cdblen = cdblen; + bcopy(cgc->cdb, suc.suc_cdb, cdblen); + suc.suc_data = cgc->buf; + suc.suc_datalen = cgc->buflen; + suc.suc_timeout = cgc->timeout; + if (ioctl(fd, SCSIRAWCDB, &suc) == -1) + return(errno); + scsistatus = suc.suc_sus.sus_status; + +/* + * If the device returns a scsi sense error and debugging is enabled print + * some hopefully useful information on stderr. +*/ + if (scsistatus && debug) + { + cp = suc.suc_sus.sus_sense; + fprintf(stderr,"scsistatus = %x cdb =", + scsistatus); + for (i = 0; i < cdblen; i++) + fprintf(stderr, " %x", cgc->cdb[i]); + fprintf(stderr, "\nsense ="); + for (i = 0; i < 16; i++) + fprintf(stderr, " %x", cp[i]); + fprintf(stderr, "\n"); + } + if (cgc->sus) + bcopy(&suc.suc_sus, cgc->sus, sizeof (struct scsi_user_sense)); + if (scsistatus) + return(EIO); /* generic i/o error for unsuccessful status */ + return(0); + } + +/* + * The entry point for the DVDioctls for BSD/OS. +*/ +static int dvd_ioctl(int fd, u_long cmd, void *arg) + { + int ret; + + switch (cmd) + { + case DVD_READ_STRUCT: + ret = dvd_read_struct(fd, (dvd_struct *)arg); + if (ret) + errno = ret; + return(ret ? -1 : 0); + case DVD_AUTH: + ret = dvd_do_auth(fd, (dvd_authinfo *)arg); + if (ret) + errno = ret; + return(ret ? -1 : 0); + default: + errno = EINVAL; + return(-1); + } + } + +/* + * The entry point for the CDROMioctls for BSD/OS +*/ +static int cdrom_read_block(int, cgc_t *, int, int, int, int); +static int cdrom_read_cd(int, cgc_t *, int, int, int ); + int cdrom_blocksize(int, int ); + +static inline +int msf_to_lba(char m, char s, char f) +{ + return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET; +} + +cdrom_ioctl(int fd, u_long cmd, void *arg) + { + int ret; + cgc_t cgc; + + switch (cmd) + { + case CDROMREADRAW: + case CDROMREADMODE1: + case CDROMREADMODE2: + { + struct cdrom_msf *msf; + int blocksize = 0, format = 0, lba; + + switch (cmd) + { + case CDROMREADRAW: + blocksize = CD_FRAMESIZE_RAW; + break; + case CDROMREADMODE1: + blocksize = CD_FRAMESIZE; + format = 2; + break; + case CDROMREADMODE2: + blocksize = CD_FRAMESIZE_RAW0; + break; + } + msf = (struct cdrom_msf *)arg; + lba = msf_to_lba(msf->cdmsf_min0,msf->cdmsf_sec0, + msf->cdmsf_frame0); + ret = EINVAL; + if (lba < 0) + break; + + cgc_init(&cgc, arg, blocksize, SUC_READ); + ret = cdrom_read_block(fd, &cgc, lba, 1, format, blocksize); + if (ret) + { +/* + * SCSI-II devices are not required to support CMD_READ_CD (which specifies + * the blocksize to read) so try switching the block size with a mode select, + * doing the normal read sector command and then changing the sector size back + * to 2048. + * + * If the program dies before changing the blocksize back sdopen() + * in the kernel will fail opens with a message that looks something like: + * + * "sr1: blksize 2336 not multiple of 512: cannot use" + * + * At that point the drive has to be power cycled (or reset in some other way). +*/ + if (ret = cdrom_blocksize(fd, blocksize)) + break; + ret = cdrom_read_cd(fd, &cgc, lba, blocksize, 1); + ret |= cdrom_blocksize(fd, 2048); + } + break; + } + case CDROMREADTOCHDR: + { + struct cdrom_tochdr *tochdr = (struct cdrom_tochdr *) arg; + u_char buffer[12]; + + cgc_init(&cgc, buffer, sizeof (buffer), SUC_READ); + cgc.cdb[0] = CMD_READ_TOC_PMA_ATIP; + cgc.cdb[1] = 0x2; /* MSF */ + cgc.cdb[8] = 12; /* LSB of length */ + + ret = scsi_cmd(fd, &cgc); + if (!ret) + { + tochdr->cdth_trk0 = buffer[2]; + tochdr->cdth_trk1 = buffer[3]; + } + break; + } + case CDROMREADTOCENTRY: + { + struct cdrom_tocentry *tocentry = (struct cdrom_tocentry *) arg; + u_char buffer[12]; + + cgc_init(&cgc, buffer, sizeof (buffer), SUC_READ); + cgc.cdb[0] = CMD_READ_TOC_PMA_ATIP; + cgc.cdb[1] = (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0; + cgc.cdb[6] = tocentry->cdte_track; + cgc.cdb[8] = 12; /* LSB of length */ + + ret = scsi_cmd(fd, &cgc); + if (ret) + break; + + tocentry->cdte_ctrl = buffer[5] & 0xf; + tocentry->cdte_adr = buffer[5] >> 4; + tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0; + if (tocentry->cdte_format == CDROM_MSF) + { + tocentry->cdte_addr.msf.minute = buffer[9]; + tocentry->cdte_addr.msf.second = buffer[10]; + tocentry->cdte_addr.msf.frame = buffer[11]; + } + else + tocentry->cdte_addr.lba = (((((buffer[8] << 8) + + buffer[9]) << 8) + + buffer[10]) << 8) + + buffer[11]; + break; + } + case CDROMEJECT: /* NO-OP for now */ + ret = cdrom_tray_move(fd, 1); + break; + case CDROMCLOSETRAY: + ret = cdrom_tray_move(fd, 0); + break; +/* + * This sucks but emulates the expected behaviour. Instead of the return + * value being the actual status a success/fail indicator should have been + * returned and the 3rd arg to the ioctl should have been an 'int *' to update + * with the actual status. Both the drive and disc status ioctl calls are + * similarily braindamaged. +*/ + case CDROM_DRIVE_STATUS: + return(CDS_NO_INFO); /* XXX */ + case CDROM_DISC_STATUS: + { + tracktype tracks; + int cnt; + + cdrom_count_tracks(fd, &tracks); + if (tracks.error) + return(tracks.error); + if (tracks.audio > 0) + { + cnt = tracks.data + tracks.cdi + tracks.xa; + if (cnt == 0) + return(CDS_AUDIO); + else + return(CDS_MIXED); + } + if (tracks.cdi) + return(CDS_XA_2_2); + if (tracks.xa) + return(CDS_XA_2_1); + if (tracks.data) + return(CDS_DATA_1); + return(CDS_NO_INFO); + } + } + errno = ret; + return(ret ? -1 : 0); + } + +static int cdrom_read_cd(int fd, cgc_t *cgc, int lba, int blocksize, int nblocks) + { + + memset(&cgc->cdb, 0, sizeof(cgc->cdb)); + cgc->cdb[0] = CMD_READ_10; + cgc->cdb[2] = (lba >> 24) & 0xff; + cgc->cdb[3] = (lba >> 16) & 0xff; + cgc->cdb[4] = (lba >> 8) & 0xff; + cgc->cdb[5] = lba & 0xff; + cgc->cdb[6] = (nblocks >> 16) & 0xff; + cgc->cdb[7] = (nblocks >> 8) & 0xff; + cgc->cdb[8] = nblocks & 0xff; + cgc->buflen = blocksize * nblocks; + return(scsi_cmd(fd, cgc)); + } + +static int cdrom_read_block(int fd, cgc_t *cgc, + int lba, int nblocks, int format, int blksize) + { + + memset(&cgc->cdb, 0, sizeof(cgc->cdb)); + cgc->cdb[0] = CMD_READ_CD; + /* expected sector size - cdda,mode1,etc. */ + cgc->cdb[1] = format << 2; + /* starting address */ + cgc->cdb[2] = (lba >> 24) & 0xff; + cgc->cdb[3] = (lba >> 16) & 0xff; + cgc->cdb[4] = (lba >> 8) & 0xff; + cgc->cdb[5] = lba & 0xff; + /* number of blocks */ + cgc->cdb[6] = (nblocks >> 16) & 0xff; + cgc->cdb[7] = (nblocks >> 8) & 0xff; + cgc->cdb[8] = nblocks & 0xff; + cgc->buflen = blksize * nblocks; + + /* set the header info returned */ + switch (blksize) + { + case CD_FRAMESIZE_RAW0: + cgc->cdb[9] = 0x58; + break; + case CD_FRAMESIZE_RAW1: + cgc->cdb[9] = 0x78; + break; + case CD_FRAMESIZE_RAW: + cgc->cdb[9] = 0xf8; + break; + default: + cgc->cdb[9] = 0x10; + } + return(scsi_cmd(fd, cgc)); + } + +static void cdrom_count_tracks(int fd, tracktype *tracks) + { + struct cdrom_tochdr header; + struct cdrom_tocentry entry; + int ret, i; + + memset(tracks, 0, sizeof (*tracks)); + ret = cdrom_ioctl(fd, CDROMREADTOCHDR, &header); +/* + * This whole business is a crock anyhow so we don't bother distinguishing + * between no media, drive not ready, etc and on any error just say we have + * no info. +*/ + if (ret) + { + tracks->error = CDS_NO_INFO; + return; + } + + entry.cdte_format = CDROM_MSF; + for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) + { + entry.cdte_track = i; + if (cdrom_ioctl(fd, CDROMREADTOCENTRY, &entry)) + { + tracks->error = CDS_NO_INFO; + return; + } + if (entry.cdte_ctrl & CDROM_DATA_TRACK) + { + if (entry.cdte_format == 0x10) + tracks->cdi++; + else if (entry.cdte_format == 0x20) + tracks->xa++; + else + tracks->data++; + } + else + tracks->audio++; + } + return; + } + +static int cdrom_tray_move(int fd, int flag) + { + cgc_t cgc; + + cgc_init(&cgc, NULL, 0, SUC_READ); + cgc.cdb[0] = CMD_START_STOP_UNIT; + cgc.cdb[1] = 1; /* immediate */ + cgc.cdb[4] = flag ? 0x2 : 0x3; /* eject : close */ + return(scsi_cmd(fd, &cgc)); + } + +/* + * Required when we need to use READ_10 to issue other than 2048 block + * reads + */ +int cdrom_blocksize(int fd, int size) + { + cgc_t cgc; + struct modesel_head mh; + + memset(&mh, 0, sizeof(mh)); + mh.block_desc_length = 0x08; + mh.block_length_med = (size >> 8) & 0xff; + mh.block_length_lo = size & 0xff; + + memset(&cgc, 0, sizeof(cgc)); + cgc.cdb[0] = 0x15; + cgc.cdb[1] = 1 << 4; + cgc.cdb[4] = 12; + cgc.buflen = sizeof(mh); + cgc.buf = (u_char *) &mh; + cgc.rw = SUC_WRITE; + mh.block_desc_length = 0x08; + mh.block_length_med = (size >> 8) & 0xff; + mh.block_length_lo = size & 0xff; + return(scsi_cmd(fd, &cgc)); + } |