static gboolean k12_seek_read(wtap *wth, gint64 seek_off, wtap_rec *rec, Buffer *buf, int *err, gchar **err_info) {
k12_t *k12 = (k12_t *)wth->priv;
guint8* buffer;
gint len;
gboolean status;
K12_DBG(5,("k12_seek_read: ENTER"));
if ( file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1) {
K12_DBG(5,("k12_seek_read: SEEK ERROR"));
return FALSE;
}
len = get_record(k12, wth->random_fh, seek_off, TRUE, err, err_info);
if (len < 0) {
K12_DBG(5,("k12_seek_read: READ ERROR"));
return FALSE;
} else if (len < K12_RECORD_SRC_ID + 4) {
/* Record not large enough to contain a src ID */
K12_DBG(5,("k12_seek_read: SHORT READ"));
*err = WTAP_ERR_SHORT_READ;
return FALSE;
}
buffer = k12->rand_read_buff;
status = process_packet_data(rec, buf, buffer, (guint)len, k12, err, err_info);
K12_DBG(5,("k12_seek_read: DONE OK"));
return status;
}
static gboolean k12_read(wtap *wth, int *err, gchar **err_info, gint64 *data_offset) {
k12_t *k12 = (k12_t *)wth->priv;
k12_src_desc_t* src_desc;
guint8* buffer;
gint64 offset;
gint len;
guint32 type;
guint32 src_id;
offset = file_tell(wth->fh);
/* ignore the record if it isn't a packet */
do {
K12_DBG(5,("k12_read: offset=%i",offset));
*data_offset = offset;
len = get_record(k12, wth->fh, offset, FALSE, err, err_info);
if (len < 0) {
/* read error */
return FALSE;
} else if (len == 0) {
/* EOF */
*err = 0;
return FALSE;
} else if (len < K12_RECORD_SRC_ID + 4) {
/* Record not large enough to contain a src ID */
*err = WTAP_ERR_BAD_FILE;
*err_info = g_strdup_printf("data record length %d too short", len);
return FALSE;
}
buffer = k12->seq_read_buff;
type = pntoh32(buffer + K12_RECORD_TYPE);
src_id = pntoh32(buffer + K12_RECORD_SRC_ID);
if ( ! (src_desc = (k12_src_desc_t*)g_hash_table_lookup(k12->src_by_id,GUINT_TO_POINTER(src_id))) ) {
/*
* Some records from K15 files have a port ID of an undeclared
* interface which happens to be the only one with the first byte changed.
* It is still unknown how to recognize when this happens.
* If the lookup of the interface record fails we'll mask it
* and retry.
*/
src_desc = (k12_src_desc_t*)g_hash_table_lookup(k12->src_by_id,GUINT_TO_POINTER(src_id&K12_RECORD_SRC_ID_MASK));
}
K12_DBG(5,("k12_read: record type=%x src_id=%x",type,src_id));
offset += len;
} while ( ((type & K12_MASK_PACKET) != K12_REC_PACKET && (type & K12_MASK_PACKET) != K12_REC_D0020) || !src_id || !src_desc );
process_packet_data(&wth->phdr, wth->frame_buffer, buffer, len, k12);
return TRUE;
}
