* Stephen Donnelly <support@endace.com>
*/
-#ifndef lint
-static const char rcsid[] _U_ =
- "@(#) $Header: /tcpdump/master/libpcap/pcap-dag.c,v 1.39 2008-04-14 20:40:58 guy Exp $ (LBL)";
-#endif
-
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "pcap-dag.h"
+/*
+ * DAG devices have names beginning with "dag", followed by a number
+ * from 0 to DAG_MAX_BOARDS, then optionally a colon and a stream number
+ * from 0 to DAG_STREAM_MAX.
+ */
+#ifndef DAG_MAX_BOARDS
+#define DAG_MAX_BOARDS 32
+#endif
+
#define ATM_CELL_SIZE 52
#define ATM_HDR_SIZE 4
unsigned short vci; /* VCI */
};
+/*
+ * Private data for capturing on DAG devices.
+ */
+struct pcap_dag {
+ struct pcap_stat stat;
+#ifdef HAVE_DAG_STREAMS_API
+ u_char *dag_mem_bottom; /* DAG card current memory bottom pointer */
+ u_char *dag_mem_top; /* DAG card current memory top pointer */
+#else /* HAVE_DAG_STREAMS_API */
+ void *dag_mem_base; /* DAG card memory base address */
+ u_int dag_mem_bottom; /* DAG card current memory bottom offset */
+ u_int dag_mem_top; /* DAG card current memory top offset */
+#endif /* HAVE_DAG_STREAMS_API */
+ int dag_fcs_bits; /* Number of checksum bits from link layer */
+ int dag_offset_flags; /* Flags to pass to dag_offset(). */
+ int dag_stream; /* DAG stream number */
+ int dag_timeout; /* timeout specified to pcap_open_live.
+ * Same as in linux above, introduce
+ * generally? */
+};
+
typedef struct pcap_dag_node {
struct pcap_dag_node *next;
pcap_t *p;
#define IS_BIGENDIAN() (*((unsigned char *)&endian_test_word))
-
-#ifdef DAG_ONLY
-/* This code is required when compiling for a DAG device only. */
-
-/* Replace dag function names with pcap equivalent. */
-#define dag_create pcap_create
-#define dag_platform_finddevs pcap_platform_finddevs
-#endif /* DAG_ONLY */
-
#define MAX_DAG_PACKET 65536
static unsigned char TempPkt[MAX_DAG_PACKET];
static void
dag_platform_cleanup(pcap_t *p)
{
-
+ struct pcap_dag *pd;
+
if (p != NULL) {
+ pd = p->priv;
#ifdef HAVE_DAG_STREAMS_API
- if(dag_stop_stream(p->fd, p->md.dag_stream) < 0)
+ if(dag_stop_stream(p->fd, pd->dag_stream) < 0)
fprintf(stderr,"dag_stop_stream: %s\n", strerror(errno));
- if(dag_detach_stream(p->fd, p->md.dag_stream) < 0)
+ if(dag_detach_stream(p->fd, pd->dag_stream) < 0)
fprintf(stderr,"dag_detach_stream: %s\n", strerror(errno));
#else
if(dag_stop(p->fd) < 0)
do {
/* sanity check we have enough bytes */
- if ( len <= (24 + (hdr_num * 8)) )
+ if ( len < (24 + (hdr_num * 8)) )
return hdr_num;
/* get the header type */
static int
dag_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
{
+ struct pcap_dag *pd = p->priv;
unsigned int processed = 0;
- int flags = p->md.dag_offset_flags;
+ int flags = pd->dag_offset_flags;
unsigned int nonblocking = flags & DAGF_NONBLOCK;
unsigned int num_ext_hdr = 0;
/* Get the next bufferful of packets (if necessary). */
- while (p->md.dag_mem_top - p->md.dag_mem_bottom < dag_record_size) {
+ while (pd->dag_mem_top - pd->dag_mem_bottom < dag_record_size) {
/*
* Has "pcap_breakloop()" been called?
* If non-block is specified it will return immediately. The user
* is then responsible for efficiency.
*/
- if ( NULL == (p->md.dag_mem_top = dag_advance_stream(p->fd, p->md.dag_stream, &(p->md.dag_mem_bottom))) ) {
+ if ( NULL == (pd->dag_mem_top = dag_advance_stream(p->fd, pd->dag_stream, &(pd->dag_mem_bottom))) ) {
return -1;
}
#else
/* dag_offset does not support timeouts */
- p->md.dag_mem_top = dag_offset(p->fd, &(p->md.dag_mem_bottom), flags);
+ pd->dag_mem_top = dag_offset(p->fd, &(pd->dag_mem_bottom), flags);
#endif /* HAVE_DAG_STREAMS_API */
- if (nonblocking && (p->md.dag_mem_top - p->md.dag_mem_bottom < dag_record_size))
+ if (nonblocking && (pd->dag_mem_top - pd->dag_mem_bottom < dag_record_size))
{
/* Pcap is configured to process only available packets, and there aren't any, return immediately. */
return 0;
}
if(!nonblocking &&
- p->md.dag_timeout &&
- (p->md.dag_mem_top - p->md.dag_mem_bottom < dag_record_size))
+ pd->dag_timeout &&
+ (pd->dag_mem_top - pd->dag_mem_bottom < dag_record_size))
{
/* Blocking mode, but timeout set and no data has arrived, return anyway.*/
return 0;
}
/* Process the packets. */
- while (p->md.dag_mem_top - p->md.dag_mem_bottom >= dag_record_size) {
+ while (pd->dag_mem_top - pd->dag_mem_bottom >= dag_record_size) {
unsigned short packet_len = 0;
int caplen = 0;
struct pcap_pkthdr pcap_header;
#ifdef HAVE_DAG_STREAMS_API
- dag_record_t *header = (dag_record_t *)(p->md.dag_mem_bottom);
+ dag_record_t *header = (dag_record_t *)(pd->dag_mem_bottom);
#else
- dag_record_t *header = (dag_record_t *)(p->md.dag_mem_base + p->md.dag_mem_bottom);
+ dag_record_t *header = (dag_record_t *)(pd->dag_mem_base + pd->dag_mem_bottom);
#endif /* HAVE_DAG_STREAMS_API */
u_char *dp = ((u_char *)header); /* + dag_record_size; */
strncpy(p->errbuf, "dag_read: record too small", PCAP_ERRBUF_SIZE);
return -1;
}
- p->md.dag_mem_bottom += rlen;
+ pd->dag_mem_bottom += rlen;
/* Count lost packets. */
switch((header->type & 0x7f)) {
default:
if (header->lctr) {
- if (p->md.stat.ps_drop > (UINT_MAX - ntohs(header->lctr))) {
- p->md.stat.ps_drop = UINT_MAX;
+ if (pd->stat.ps_drop > (UINT_MAX - ntohs(header->lctr))) {
+ pd->stat.ps_drop = UINT_MAX;
} else {
- p->md.stat.ps_drop += ntohs(header->lctr);
+ pd->stat.ps_drop += ntohs(header->lctr);
}
}
}
case TYPE_COLOR_ETH:
case TYPE_ETH:
packet_len = ntohs(header->wlen);
- packet_len -= (p->md.dag_fcs_bits >> 3);
+ packet_len -= (pd->dag_fcs_bits >> 3);
caplen = rlen - dag_record_size - 2;
if (caplen > packet_len) {
caplen = packet_len;
case TYPE_COLOR_HDLC_POS:
case TYPE_HDLC_POS:
packet_len = ntohs(header->wlen);
- packet_len -= (p->md.dag_fcs_bits >> 3);
+ packet_len -= (pd->dag_fcs_bits >> 3);
caplen = rlen - dag_record_size;
if (caplen > packet_len) {
caplen = packet_len;
case TYPE_COLOR_MC_HDLC_POS:
case TYPE_MC_HDLC:
packet_len = ntohs(header->wlen);
- packet_len -= (p->md.dag_fcs_bits >> 3);
+ packet_len -= (pd->dag_fcs_bits >> 3);
caplen = rlen - dag_record_size - 4;
if (caplen > packet_len) {
caplen = packet_len;
pcap_header.len = packet_len;
/* Count the packet. */
- p->md.stat.ps_recv++;
+ pd->stat.ps_recv++;
/* Call the user supplied callback function */
callback(user, &pcap_header, dp);
/* Only count packets that pass the filter, for consistency with standard Linux behaviour. */
processed++;
- if (processed == cnt && cnt > 0)
+ if (processed == cnt && !PACKET_COUNT_IS_UNLIMITED(cnt))
{
/* Reached the user-specified limit. */
return cnt;
*/
static int dag_activate(pcap_t* handle)
{
+ struct pcap_dag *handlep = handle->priv;
#if 0
char conf[30]; /* dag configure string */
#endif
}
/* Parse input name to get dag device and stream number if provided */
- if (dag_parse_name(device, newDev, strlen(device) + 16, &handle->md.dag_stream) < 0) {
+ if (dag_parse_name(device, newDev, strlen(device) + 16, &handlep->dag_stream) < 0) {
snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "dag_parse_name: %s\n", pcap_strerror(errno));
goto fail;
}
device = newDev;
- if (handle->md.dag_stream%2) {
+ if (handlep->dag_stream%2) {
snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "dag_parse_name: tx (even numbered) streams not supported for capture\n");
goto fail;
}
#ifdef HAVE_DAG_STREAMS_API
/* Open requested stream. Can fail if already locked or on error */
- if (dag_attach_stream(handle->fd, handle->md.dag_stream, 0, 0) < 0) {
+ if (dag_attach_stream(handle->fd, handlep->dag_stream, 0, 0) < 0) {
snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "dag_attach_stream: %s\n", pcap_strerror(errno));
goto failclose;
}
/* Set up default poll parameters for stream
* Can be overridden by pcap_set_nonblock()
*/
- if (dag_get_stream_poll(handle->fd, handle->md.dag_stream,
+ if (dag_get_stream_poll(handle->fd, handlep->dag_stream,
&mindata, &maxwait, &poll) < 0) {
snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "dag_get_stream_poll: %s\n", pcap_strerror(errno));
goto faildetach;
}
- /* Amount of data to collect in Bytes before calling callbacks.
- * Important for efficiency, but can introduce latency
- * at low packet rates if to_ms not set!
- */
- mindata = 65536;
+ if (handle->opt.immediate) {
+ /* Call callback immediately.
+ * XXX - is this the right way to handle this?
+ */
+ mindata = 0;
+ } else {
+ /* Amount of data to collect in Bytes before calling callbacks.
+ * Important for efficiency, but can introduce latency
+ * at low packet rates if to_ms not set!
+ */
+ mindata = 65536;
+ }
- /* Obey md.timeout (was to_ms) if supplied. This is a good idea!
+ /* Obey opt.timeout (was to_ms) if supplied. This is a good idea!
* Recommend 10-100ms. Calls will time out even if no data arrived.
*/
- maxwait.tv_sec = handle->md.timeout/1000;
- maxwait.tv_usec = (handle->md.timeout%1000) * 1000;
+ maxwait.tv_sec = handle->opt.timeout/1000;
+ maxwait.tv_usec = (handle->opt.timeout%1000) * 1000;
- if (dag_set_stream_poll(handle->fd, handle->md.dag_stream,
+ if (dag_set_stream_poll(handle->fd, handlep->dag_stream,
mindata, &maxwait, &poll) < 0) {
snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "dag_set_stream_poll: %s\n", pcap_strerror(errno));
goto faildetach;
}
#else
- if((handle->md.dag_mem_base = dag_mmap(handle->fd)) == MAP_FAILED) {
+ if((handlep->dag_mem_base = dag_mmap(handle->fd)) == MAP_FAILED) {
snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,"dag_mmap %s: %s\n", device, pcap_strerror(errno));
goto failclose;
}
#endif
#ifdef HAVE_DAG_STREAMS_API
- if(dag_start_stream(handle->fd, handle->md.dag_stream) < 0) {
+ if(dag_start_stream(handle->fd, handlep->dag_stream) < 0) {
snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "dag_start_stream %s: %s\n", device, pcap_strerror(errno));
goto faildetach;
}
* initialized to zero on startup, it won't give you
* a compiler warning if you make this mistake!
*/
- handle->md.dag_mem_bottom = 0;
- handle->md.dag_mem_top = 0;
+ handlep->dag_mem_bottom = 0;
+ handlep->dag_mem_top = 0;
/*
* Find out how many FCS bits we should strip.
daginf = dag_info(handle->fd);
if ((0x4200 == daginf->device_code) || (0x4230 == daginf->device_code)) {
/* DAG 4.2S and 4.23S already strip the FCS. Stripping the final word again truncates the packet. */
- handle->md.dag_fcs_bits = 0;
+ handlep->dag_fcs_bits = 0;
/* Note that no FCS will be supplied. */
handle->linktype_ext = LT_FCS_DATALINK_EXT(0);
/*
* Start out assuming it's 32 bits.
*/
- handle->md.dag_fcs_bits = 32;
+ handlep->dag_fcs_bits = 32;
/* Allow an environment variable to override. */
if ((s = getenv("ERF_FCS_BITS")) != NULL) {
if ((n = atoi(s)) == 0 || n == 16 || n == 32) {
- handle->md.dag_fcs_bits = n;
+ handlep->dag_fcs_bits = n;
} else {
snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
"pcap_activate %s: bad ERF_FCS_BITS value (%d) in environment\n", device, n);
if ((s = getenv("ERF_DONT_STRIP_FCS")) != NULL) {
/* Yes. Note the number of bytes that will be
supplied. */
- handle->linktype_ext = LT_FCS_DATALINK_EXT(handle->md.dag_fcs_bits/16);
+ handle->linktype_ext = LT_FCS_DATALINK_EXT(handlep->dag_fcs_bits/16);
/* And don't strip them. */
- handle->md.dag_fcs_bits = 0;
+ handlep->dag_fcs_bits = 0;
}
}
- handle->md.dag_timeout = handle->md.timeout;
+ handlep->dag_timeout = handle->opt.timeout;
handle->linktype = -1;
if (dag_get_datalink(handle) < 0)
handle->setnonblock_op = dag_setnonblock;
handle->stats_op = dag_stats;
handle->cleanup_op = dag_platform_cleanup;
- handle->md.stat.ps_drop = 0;
- handle->md.stat.ps_recv = 0;
- handle->md.stat.ps_ifdrop = 0;
+ handlep->stat.ps_drop = 0;
+ handlep->stat.ps_recv = 0;
+ handlep->stat.ps_ifdrop = 0;
return 0;
#ifdef HAVE_DAG_STREAMS_API
failstop:
- if (dag_stop_stream(handle->fd, handle->md.dag_stream) < 0) {
+ if (dag_stop_stream(handle->fd, handlep->dag_stream) < 0) {
fprintf(stderr,"dag_stop_stream: %s\n", strerror(errno));
}
faildetach:
- if (dag_detach_stream(handle->fd, handle->md.dag_stream) < 0)
+ if (dag_detach_stream(handle->fd, handlep->dag_stream) < 0)
fprintf(stderr,"dag_detach_stream: %s\n", strerror(errno));
#else
failstop:
return PCAP_ERROR;
}
-pcap_t *dag_create(const char *device, char *ebuf)
+pcap_t *dag_create(const char *device, char *ebuf, int *is_ours)
{
+ const char *cp;
+ char *cpend;
+ long devnum;
pcap_t *p;
+#ifdef HAVE_DAG_STREAMS_API
+ long stream = 0;
+#endif
+
+ /* Does this look like a DAG device? */
+ cp = strrchr(device, '/');
+ if (cp == NULL)
+ cp = device;
+ /* Does it begin with "dag"? */
+ if (strncmp(cp, "dag", 3) != 0) {
+ /* Nope, doesn't begin with "dag" */
+ *is_ours = 0;
+ return NULL;
+ }
+ /* Yes - is "dag" followed by a number from 0 to DAG_MAX_BOARDS-1 */
+ cp += 3;
+ devnum = strtol(cp, &cpend, 10);
+#ifdef HAVE_DAG_STREAMS_API
+ if (*cpend == ':') {
+ /* Followed by a stream number. */
+ stream = strtol(++cpend, &cpend, 10);
+ }
+#endif
+ if (cpend == cp || *cpend != '\0') {
+ /* Not followed by a number. */
+ *is_ours = 0;
+ return NULL;
+ }
+ if (devnum < 0 || devnum >= DAG_MAX_BOARDS) {
+ /* Followed by a non-valid number. */
+ *is_ours = 0;
+ return NULL;
+ }
+#ifdef HAVE_DAG_STREAMS_API
+ if (stream <0 || stream >= DAG_STREAM_MAX) {
+ /* Followed by a non-valid stream number. */
+ *is_ours = 0;
+ return NULL;
+ }
+#endif
+
+ /* OK, it's probably ours. */
+ *is_ours = 1;
- p = pcap_create_common(device, ebuf);
+ p = pcap_create_common(device, ebuf, sizeof (struct pcap_dag));
if (p == NULL)
return NULL;
static int
dag_stats(pcap_t *p, struct pcap_stat *ps) {
+ struct pcap_dag *pd = p->priv;
+
/* This needs to be filled out correctly. Hopefully a dagapi call will
provide all necessary information.
*/
- /*p->md.stat.ps_recv = 0;*/
- /*p->md.stat.ps_drop = 0;*/
+ /*pd->stat.ps_recv = 0;*/
+ /*pd->stat.ps_drop = 0;*/
- *ps = p->md.stat;
+ *ps = pd->stat;
return 0;
}
* open attempts will still be much less than the naive approach.
*/
int
-dag_platform_finddevs(pcap_if_t **devlistp, char *errbuf)
+dag_findalldevs(pcap_if_t **devlistp, char *errbuf)
{
char name[12]; /* XXX - pick a size */
int ret = 0;
int dagstream;
int dagfd;
- /* Try all the DAGs 0-31 */
- for (c = 0; c < 32; c++) {
+ /* Try all the DAGs 0-DAG_MAX_BOARDS */
+ for (c = 0; c < DAG_MAX_BOARDS; c++) {
snprintf(name, 12, "dag%d", c);
if (-1 == dag_parse_name(name, dagname, DAGNAME_BUFSIZE, &dagstream))
{
if (install_bpf_program(p, fp) < 0)
return -1;
- p->md.use_bpf = 0;
-
return (0);
}
static int
dag_setnonblock(pcap_t *p, int nonblock, char *errbuf)
{
+ struct pcap_dag *pd = p->priv;
+
/*
* Set non-blocking mode on the FD.
* XXX - is that necessary? If not, don't bother calling it,
* and have a "dag_getnonblock()" function that looks at
- * "p->md.dag_offset_flags".
+ * "pd->dag_offset_flags".
*/
if (pcap_setnonblock_fd(p, nonblock, errbuf) < 0)
return (-1);
struct timeval maxwait;
struct timeval poll;
- if (dag_get_stream_poll(p->fd, p->md.dag_stream,
+ if (dag_get_stream_poll(p->fd, pd->dag_stream,
&mindata, &maxwait, &poll) < 0) {
snprintf(errbuf, PCAP_ERRBUF_SIZE, "dag_get_stream_poll: %s\n", pcap_strerror(errno));
return -1;
else
mindata = 65536;
- if (dag_set_stream_poll(p->fd, p->md.dag_stream,
+ if (dag_set_stream_poll(p->fd, pd->dag_stream,
mindata, &maxwait, &poll) < 0) {
snprintf(errbuf, PCAP_ERRBUF_SIZE, "dag_set_stream_poll: %s\n", pcap_strerror(errno));
return -1;
}
#endif /* HAVE_DAG_STREAMS_API */
if (nonblock) {
- p->md.dag_offset_flags |= DAGF_NONBLOCK;
+ pd->dag_offset_flags |= DAGF_NONBLOCK;
} else {
- p->md.dag_offset_flags &= ~DAGF_NONBLOCK;
+ pd->dag_offset_flags &= ~DAGF_NONBLOCK;
}
return (0);
}
static int
dag_get_datalink(pcap_t *p)
{
+ struct pcap_dag *pd = p->priv;
int index=0, dlt_index=0;
uint8_t types[255];
#ifdef HAVE_DAG_GET_STREAM_ERF_TYPES
/* Get list of possible ERF types for this card */
- if (dag_get_stream_erf_types(p->fd, p->md.dag_stream, types, 255) < 0) {
+ if (dag_get_stream_erf_types(p->fd, pd->dag_stream, types, 255) < 0) {
snprintf(p->errbuf, sizeof(p->errbuf), "dag_get_stream_erf_types: %s", pcap_strerror(errno));
return (-1);
}
projects / platform / upstream / libpcap.git / blobdiff