/* Parses a record. */
static gboolean
read_eyesdn_rec(FILE_T fh, struct wtap_pkthdr *phdr, Buffer *buf, int *err,
gchar **err_info)
{
union wtap_pseudo_header *pseudo_header = &phdr->pseudo_header;
guint8 hdr[EYESDN_HDR_LENGTH];
time_t secs;
int usecs;
int pkt_len;
guint8 channel, direction;
int bytes_read;
guint8 *pd;
/* Our file pointer should be at the summary information header
* for a packet. Read in that header and extract the useful
* information.
*/
if (esc_read(hdr, EYESDN_HDR_LENGTH, fh) != EYESDN_HDR_LENGTH) {
*err = file_error(fh, err_info);
if (*err == 0)
*err = WTAP_ERR_SHORT_READ;
return FALSE;
}
/* extract information from header */
usecs = pntoh24(&hdr[0]);
#ifdef TV64BITS
secs = hdr[3];
#else
secs = 0;
#endif
secs = (secs << 8) | hdr[4];
secs = (secs << 8) | hdr[5];
secs = (secs << 8) | hdr[6];
secs = (secs << 8) | hdr[7];
channel = hdr[8];
direction = hdr[9];
pkt_len = pntoh16(&hdr[10]);
switch(direction >> 1) {
default:
case EYESDN_ENCAP_ISDN: /* ISDN */
pseudo_header->isdn.uton = direction & 1;
pseudo_header->isdn.channel = channel;
if(channel) { /* bearer channels */
phdr->pkt_encap = WTAP_ENCAP_ISDN; /* recognises PPP */
pseudo_header->isdn.uton=!pseudo_header->isdn.uton; /* bug */
} else { /* D channel */
phdr->pkt_encap = WTAP_ENCAP_ISDN;
}
break;
case EYESDN_ENCAP_MSG: /* Layer 1 message */
phdr->pkt_encap = WTAP_ENCAP_LAYER1_EVENT;
pseudo_header->l1event.uton = (direction & 1);
break;
case EYESDN_ENCAP_LAPB: /* X.25 via LAPB */
phdr->pkt_encap = WTAP_ENCAP_LAPB;
pseudo_header->x25.flags = (direction & 1) ? 0 : 0x80;
break;
case EYESDN_ENCAP_ATM: { /* ATM cells */
#define CELL_LEN 53
unsigned char cell[CELL_LEN];
gint64 cur_off;
if(pkt_len != CELL_LEN) {
*err = WTAP_ERR_BAD_FILE;
*err_info = g_strdup_printf(
"eyesdn: ATM cell has a length != 53 (%u)",
pkt_len);
return FALSE;
}
cur_off = file_tell(fh);
if (esc_read(cell, CELL_LEN, fh) != CELL_LEN) {
*err = file_error(fh, err_info);
if (*err == 0)
*err = WTAP_ERR_SHORT_READ;
return FALSE;
}
if (file_seek(fh, cur_off, SEEK_SET, err) == -1)
return FALSE;
phdr->pkt_encap = WTAP_ENCAP_ATM_PDUS_UNTRUNCATED;
pseudo_header->atm.flags=ATM_RAW_CELL;
pseudo_header->atm.aal=AAL_UNKNOWN;
pseudo_header->atm.type=TRAF_UMTS_FP;
pseudo_header->atm.subtype=TRAF_ST_UNKNOWN;
pseudo_header->atm.vpi=((cell[0]&0xf)<<4) + (cell[0]&0xf);
pseudo_header->atm.vci=((cell[0]&0xf)<<4) + cell[0]; /* from cell */
pseudo_header->atm.channel=direction & 1;
}
break;
case EYESDN_ENCAP_MTP2: /* SS7 frames */
pseudo_header->mtp2.sent = direction & 1;
pseudo_header->mtp2.annex_a_used = MTP2_ANNEX_A_USED_UNKNOWN;
pseudo_header->mtp2.link_number = channel;
phdr->pkt_encap = WTAP_ENCAP_MTP2_WITH_PHDR;
break;
case EYESDN_ENCAP_DPNSS: /* DPNSS */
pseudo_header->isdn.uton = direction & 1;
pseudo_header->isdn.channel = channel;
phdr->pkt_encap = WTAP_ENCAP_DPNSS;
break;
case EYESDN_ENCAP_DASS2: /* DASS2 frames */
pseudo_header->isdn.uton = direction & 1;
pseudo_header->isdn.channel = channel;
phdr->pkt_encap = WTAP_ENCAP_DPNSS;
break;
case EYESDN_ENCAP_BACNET: /* BACNET async over HDLC frames */
pseudo_header->isdn.uton = direction & 1;
pseudo_header->isdn.channel = channel;
phdr->pkt_encap = WTAP_ENCAP_BACNET_MS_TP_WITH_PHDR;
break;
case EYESDN_ENCAP_V5_EF: /* V5EF */
pseudo_header->isdn.uton = direction & 1;
pseudo_header->isdn.channel = channel;
phdr->pkt_encap = WTAP_ENCAP_V5_EF;
break;
}
if(pkt_len > EYESDN_MAX_PACKET_LEN) {
*err = WTAP_ERR_BAD_FILE;
*err_info = g_strdup_printf("eyesdn: File has %u-byte packet, bigger than maximum of %u",
pkt_len, EYESDN_MAX_PACKET_LEN);
return FALSE;
}
phdr->presence_flags = WTAP_HAS_TS;
phdr->ts.secs = secs;
phdr->ts.nsecs = usecs * 1000;
phdr->caplen = pkt_len;
phdr->len = pkt_len;
/* Make sure we have enough room for the packet */
buffer_assure_space(buf, EYESDN_MAX_PACKET_LEN);
errno = WTAP_ERR_CANT_READ;
pd = buffer_start_ptr(buf);
bytes_read = esc_read(pd, pkt_len, fh);
if (bytes_read != pkt_len) {
if (bytes_read == -2) {
*err = file_error(fh, err_info);
if (*err == 0)
*err = WTAP_ERR_SHORT_READ;
} else if (bytes_read == -1) {
*err = WTAP_ERR_BAD_FILE;
*err_info = g_strdup("eyesdn: No flag character seen in frame");
} else
*err = WTAP_ERR_SHORT_READ;
return FALSE;
}
return TRUE;
}
uint32_t Tvbuff::tvb_get_ntoh24(tvbuff_t *tvb,int offset)
{
const uint8_t *ptr;
ptr = ensure_contiguous(tvb,offset,3);
return pntoh24(ptr);
}
