static int endace_daq_initialize(const DAQ_Config_t * config, void **ctxt_ptr, char *errbuf, size_t len)
{
// Passive mode is all that is currently supported
if (config->mode != DAQ_MODE_PASSIVE)
{
snprintf(errbuf, len, "%s: Unsupported mode", __FUNCTION__);
return DAQ_ERROR;
}
// Setup the context
EndaceDAGCtx_t *ctx = calloc(1, sizeof(EndaceDAGCtx_t));
if (!ctx)
{
snprintf(errbuf, len, "%s: failed to allocate memory for the new Endace DAG context!", __FUNCTION__);
return DAQ_ERROR_NOMEM;
}
// Parse device information out for processing
if ( dag_parse_name(config->name, ctx->name, DAGNAME_BUFSIZE, &ctx->stream) < 0 )
{
snprintf(errbuf, len, "%s: invalid device specification!", __FUNCTION__);
return DAQ_ERROR;
}
ctx->state = DAQ_STATE_INITIALIZED;
ctx->snaplen = config->snaplen;
*ctxt_ptr = ctx;
return DAQ_SUCCESS;
}
/**
* \brief Initialize the ERF receiver thread, generate a single
* ErfDagThreadVar structure for each thread, this will
* contain a DAG file descriptor which is read when the
* thread executes.
*
* \param tv Thread variable to ThreadVars
* \param initdata Initial data to the interface passed from the user,
* this is processed by the user.
*
* We assume that we have only a single name for the DAG
* interface.
*
* \param data data pointer gets populated with
*
*/
TmEcode
ReceiveErfDagThreadInit(ThreadVars *tv, void *initdata, void **data)
{
SCEnter();
int stream_count = 0;
if (initdata == NULL) {
SCLogError(SC_ERR_INVALID_ARGUMENT, "Error: No DAG interface provided.");
SCReturnInt(TM_ECODE_FAILED);
}
ErfDagThreadVars *ewtn = SCMalloc(sizeof(ErfDagThreadVars));
if (unlikely(ewtn == NULL)) {
SCLogError(SC_ERR_MEM_ALLOC, "Failed to allocate memory for ERF DAG thread vars.");
exit(EXIT_FAILURE);
}
memset(ewtn, 0, sizeof(*ewtn));
/* dag_parse_name will return a DAG device name and stream number
* to open for this thread.
*/
if (dag_parse_name(initdata, ewtn->dagname, DAGNAME_BUFSIZE,
&ewtn->dagstream) < 0)
{
SCLogError(SC_ERR_INVALID_ARGUMENT,
"Failed to parse DAG interface: %s",
(char*)initdata);
SCFree(ewtn);
exit(EXIT_FAILURE);
}
SCLogInfo("Opening DAG: %s on stream: %d for processing",
ewtn->dagname, ewtn->dagstream);
if ((ewtn->dagfd = dag_open(ewtn->dagname)) < 0)
{
SCLogError(SC_ERR_ERF_DAG_OPEN_FAILED, "Failed to open DAG: %s",
ewtn->dagname);
SCFree(ewtn);
SCReturnInt(TM_ECODE_FAILED);
}
/* Check to make sure the card has enough available streams to
* support reading from the one specified.
*/
if ((stream_count = dag_rx_get_stream_count(ewtn->dagfd)) < 0)
{
SCLogError(SC_ERR_ERF_DAG_OPEN_FAILED,
"Failed to open stream: %d, DAG: %s, could not query stream count",
ewtn->dagstream, ewtn->dagname);
SCFree(ewtn);
SCReturnInt(TM_ECODE_FAILED);
}
/* Check to make sure we have enough rx streams to open the stream
* the user is asking for.
*/
if (ewtn->dagstream > stream_count*2)
{
SCLogError(SC_ERR_ERF_DAG_OPEN_FAILED,
"Failed to open stream: %d, DAG: %s, insufficient streams: %d",
ewtn->dagstream, ewtn->dagname, stream_count);
SCFree(ewtn);
SCReturnInt(TM_ECODE_FAILED);
}
/* If we are transmitting into a soft DAG card then set the stream
* to act in reverse mode.
*/
if (0 != (ewtn->dagstream & 0x01))
{
/* Setting reverse mode for using with soft dag from daemon side */
if(dag_set_mode(ewtn->dagfd, ewtn->dagstream, DAG_REVERSE_MODE)) {
SCLogError(SC_ERR_ERF_DAG_STREAM_OPEN_FAILED,
"Failed to set mode to DAG_REVERSE_MODE on stream: %d, DAG: %s",
ewtn->dagstream, ewtn->dagname);
SCFree(ewtn);
SCReturnInt(TM_ECODE_FAILED);
}
}
if (dag_attach_stream(ewtn->dagfd, ewtn->dagstream, 0, 0) < 0)
{
SCLogError(SC_ERR_ERF_DAG_STREAM_OPEN_FAILED,
"Failed to open DAG stream: %d, DAG: %s",
ewtn->dagstream, ewtn->dagname);
SCFree(ewtn);
SCReturnInt(TM_ECODE_FAILED);
}
if (dag_start_stream(ewtn->dagfd, ewtn->dagstream) < 0)
{
SCLogError(SC_ERR_ERF_DAG_STREAM_START_FAILED,
"Failed to start DAG stream: %d, DAG: %s",
ewtn->dagstream, ewtn->dagname);
SCFree(ewtn);
SCReturnInt(TM_ECODE_FAILED);
}
SCLogInfo("Attached and started stream: %d on DAG: %s",
ewtn->dagstream, ewtn->dagname);
/*
* Initialise DAG Polling parameters.
*/
timerclear(&ewtn->maxwait);
ewtn->maxwait.tv_usec = 20 * 1000; /* 20ms timeout */
timerclear(&ewtn->poll);
ewtn->poll.tv_usec = 1 * 1000; /* 1ms poll interval */
/* 32kB minimum data to return -- we still restrict the number of
* pkts that are processed to a maximum of dag_max_read_packets.
*/
if (dag_set_stream_poll(ewtn->dagfd, ewtn->dagstream, 32*1024, &(ewtn->maxwait), &(ewtn->poll)) < 0)
{
SCLogError(SC_ERR_ERF_DAG_STREAM_SET_FAILED,
"Failed to set poll parameters for stream: %d, DAG: %s",
ewtn->dagstream, ewtn->dagname);
SCFree(ewtn);
SCReturnInt(TM_ECODE_FAILED);
}
ewtn->packets = SCPerfTVRegisterCounter("capture.dag_packets",
tv, SC_PERF_TYPE_UINT64, "NULL");
ewtn->drops = SCPerfTVRegisterCounter("capture.dag_drops",
tv, SC_PERF_TYPE_UINT64, "NULL");
ewtn->tv = tv;
*data = (void *)ewtn;
SCLogInfo("Starting processing packets from stream: %d on DAG: %s",
ewtn->dagstream, ewtn->dagname);
SCReturnInt(TM_ECODE_OK);
}
int pfring_dag_open(pfring *ring) {
int i = 0;
pfring_dag *d = NULL;
uint32_t mindata;
struct timeval maxwait;
struct timeval poll;
daginf_t* info;
uint8_t stream_erf_types[MAX_CARD_ERF_TYPES];
uint8_t supported = 0;
ring->close = pfring_dag_close;
ring->stats = pfring_dag_stats;
ring->recv = pfring_dag_recv;
ring->set_poll_watermark = pfring_dag_set_poll_watermark;
ring->set_poll_duration = pfring_dag_set_poll_duration;
ring->set_direction = pfring_dag_set_direction;
ring->enable_ring = pfring_dag_enable_ring;
ring->priv_data = malloc(sizeof(pfring_dag));
if(ring->priv_data == NULL)
goto ret_error;
memset(ring->priv_data, 0, sizeof(pfring_dag));
d = ring->priv_data;
if(ring->caplen > MAX_CAPLEN)
ring->caplen = MAX_CAPLEN;
d->device_name = (char *) malloc(DAGNAME_BUFSIZE);
if (d->device_name == NULL) {
goto free_private;
}
if (dag_parse_name(ring->device_name, d->device_name, DAGNAME_BUFSIZE, &d->stream_num) < 0) {
fprintf(stderr,"Error: device name not recognized\n");
goto free_device_name;
}
if (d->stream_num % 2) {
fprintf(stderr,"Error: odd-numbered streams are TX streams\n");
goto free_device_name;
}
if((d->fd = dag_open((char *) d->device_name)) < 0) {
fprintf(stderr, "Error opening %s\n", d->device_name);
goto free_device_name;
}
if (dag_attach_stream(d->fd, d->stream_num, 0, 0) < 0) {
fprintf(stderr, "Error attaching to stream %d: is it already attached to another application?\n", d->stream_num);
goto dag_close;
}
if (dag_get_stream_poll(d->fd, d->stream_num, &mindata, &maxwait, &poll) < 0) {
fprintf(stderr, "Error getting poll info\n");
goto dag_detach;
}
ring->poll_duration = DEFAULT_POLL_DURATION;
mindata = DEFAULT_MIN_PKT_QUEUED * AVG_PACKET_SIZE; //min_pkt=128, avg=512 -> min_bytes=65536
maxwait.tv_sec = ring->poll_duration / 1000;
maxwait.tv_usec = (ring->poll_duration % 1000) * 1000;
if (dag_set_stream_poll(d->fd, d->stream_num, mindata, &maxwait, &poll) < 0) {
fprintf(stderr, "Error setting poll info\n");
goto dag_detach;
}
if(dag_start_stream(d->fd, d->stream_num) < 0) {
fprintf(stderr, "Error starting stream\n");
goto dag_detach;
}
d->bottom = NULL;
d->top = NULL;
d->strip_crc = 1;
info = dag_info(d->fd);
if (info->device_code == 0x4200 || info->device_code == 0x4230) //these cards already strip the CRC
d->strip_crc = 0;
memset(stream_erf_types, 0, MAX_CARD_ERF_TYPES);
if (dag_get_stream_erf_types(d->fd, d->stream_num, stream_erf_types, MAX_CARD_ERF_TYPES) < 0) {
fprintf(stderr, "Error getting stream type\n");
goto dag_stop;
}
while (stream_erf_types[i] && i<MAX_CARD_ERF_TYPES)
switch(stream_erf_types[i++] & 0x7f) {
case TYPE_ETH:
case TYPE_COLOR_ETH:
case TYPE_DSM_COLOR_ETH:
case TYPE_COLOR_HASH_ETH:
supported = 1;
break;
default:
break;
}
if (!supported){
fprintf(stderr, "Error: stream type not supported\n");
goto dag_stop;
}
return 0;
dag_stop:
dag_stop_stream(d->fd, d->stream_num);
dag_detach:
dag_detach_stream(d->fd, d->stream_num);
dag_close:
dag_close(ring->fd);
free_device_name:
free(d->device_name);
free_private:
free(ring->priv_data);
ret_error:
return -1;
}
int open_device(char *dagname_buf)
{
struct timeval maxwait;
struct timeval poll;
//daginf_t *daginfo;
//dagutil_set_progname("DAG_CAPD");
/* Set up default DAG device. */
#if 0
if (-1 == dag_parse_name(dagname_buf, dagname, DAGNAME_BUFSIZE, &dag_devnum)) {
log_print(LOGN_CRI, "%s: FAIL[dag_parse_name] [%s]", __FUNCTION__, strerror(errno));
exit(errno);
}
if((dag_fd = dag_open(dagname)) < 0) {
log_print(LOGN_CRI, "%s: FAIL[dag_open] [%s]", __FUNCTION__, strerror(errno));
exit(errno);
}
/* No option configured now.*/
buffer[0] = 0;
if(dag_configure(dag_fd, buffer) < 0) {
log_print(LOGN_CRI, "%s: FAIL[dag_configure] [%s]", __FUNCTION__, strerror(errno));
exit(errno);
}
if(dag_attach_stream(dag_fd, dag_devnum, 0, 0) < 0) {
log_print(LOGN_CRI, "%s: FAIL[dag_attach_stream] [%s]", __FUNCTION__, strerror(errno));
exit(errno);
}
if(dag_start_stream(dag_fd, dag_devnum) < 0) {
log_print(LOGN_CRI, "%s: FAIL[dag_start_stream] [%s]", __FUNCTION__, strerror(errno));
exit(errno);
}
/* Query the card first for special cases. */
daginfo = dag_info(dag_fd);
if ((0x4200 == daginfo->device_code) || (0x4230 == daginfo->device_code)) {
/* DAG 4.2S and 4.23S already strip the FCS. */
/* Stripping the final word again truncates the packet. */
/* (pcap-dag.c of libpcap) */
fcs_bits = 0;
}
log_print(LOGN_INFO, "DEVICE[%04x]: %s [FCS: %d]",
daginfo->device_code, dag_device_name(daginfo->device_code, 1), fcs_bits);
#endif
/*
* Initialise DAG Polling parameters.
*/
#if 0
timerclear(&maxwait);
maxwait.tv_usec = 100 * 1000; /* 100ms timeout */
timerclear(&poll);
poll.tv_usec = 10 * 1000; /* 10ms poll interval */
/* 32kB minimum data to return */
dag_set_stream_poll(dag_fd, dag_devnum, 32*ONE_KIBI, &maxwait, &poll);
#endif
#if 1
uint32_t mindata;
timerclear(&maxwait);
//maxwait.tv_usec = 100 * 1000; /* 100ms timeout */
timerclear(&poll);
//poll.tv_usec = 10 * 1000; /* 10ms poll interval */
//mindata = 32*1024;
mindata = 0;
/* 32kB minimum data to return */
//dag_set_stream_poll(dag_fd, dag_devnum, mindata, &maxwait, &poll);
#endif
log_print( LOGN_DEBUG, "dag_devnum:%d", dag_devnum );
return 0;
}