void* dag_legacy_capture(void* ptr){
struct CI* CI = (struct CI*)ptr;
struct dag_context cap;
capture_init(CI, &cap.base);
logmsg(verbose, CAPTURE, "CI[%d] initializing capture on %s using DAGv1 (memory at %p).\n", CI->id, cap.base.iface, &datamem[CI->id]);
if ( !setup_device(CI) ){
/* error already show */
return NULL;
}
cap.fd = CI->sd;
cap.buffer = dag_mmap(CI->sd);
cap.top = 0;
cap.bottom = 0;
/* setup callbacks */
cap.base.init = (init_callback)dagcapture_init;
cap.base.destroy = (destroy_callback)dagcapture_destroy;
cap.base.read_packet = (read_packet_callback)legacy_read_packet;
/* start capture */
capture_loop(CI, (struct capture_context*)&cap);
return NULL;
}
/* Initialises a DAG input trace */
static int dag_init_input(libtrace_t *libtrace) {
struct stat buf;
char *dag_dev_name = NULL;
char *scan = NULL;
/* Since DAG 2.5 has been changed to support a slightly different URI
* format, it's probably a good idea to deal with URIs specified in
* such a fashion even if we just end up ignoring the stream number */
if ((scan = strchr(libtrace->uridata,',')) == NULL) {
dag_dev_name = strdup(libtrace->uridata);
} else {
dag_dev_name = (char *)strndup(libtrace->uridata,
(size_t)(scan - libtrace->uridata));
}
/* Make sure a DAG device with the right name exists */
if (stat(dag_dev_name, &buf) == -1) {
trace_set_err(libtrace,errno,"stat(%s)",dag_dev_name);
free(dag_dev_name);
return -1;
}
dag_init_format_data(libtrace);
if (S_ISCHR(buf.st_mode)) {
/* DEVICE */
if((FORMAT_DATA->fd = dag_open(dag_dev_name)) < 0) {
trace_set_err(libtrace,errno,"Cannot open DAG %s",
dag_dev_name);
free(dag_dev_name);
return -1;
}
/* Memory-map ourselves a pointer to the DAG memory hole */
if((FORMAT_DATA->buf = (void *)dag_mmap(FORMAT_DATA->fd)) == MAP_FAILED) {
trace_set_err(libtrace,errno,"Cannot mmap DAG %s",
dag_dev_name);
free(dag_dev_name);
return -1;
}
} else {
trace_set_err(libtrace,errno,"Not a valid dag device: %s",
dag_dev_name);
free(dag_dev_name);
return -1;
}
free(dag_dev_name);
return 0;
}
