/*
- * pcap-dag.c: Packet capture interface for Endace DAG card.
+ * pcap-dag.c: Packet capture interface for Emulex EndaceDAG cards.
*
* The functionality of this code attempts to mimic that of pcap-linux as much
* as possible. This code is compiled in several different ways depending on
* called as required from their pcap-linux/bpf equivalents.
*
* Authors: Richard Littin, Sean Irvine ({richard,sean}@reeltwo.com)
+ * Modifications: Jesper Peterson
+ * Koryn Grant
*/
-#ifndef lint
-static const char rcsid[] _U_ =
- "@(#) $Header: /tcpdump/master/libpcap/pcap-dag.c,v 1.20 2005-01-21 10:11:39 guy Exp $ (LBL)";
-#endif
-
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "dagnew.h"
#include "dagapi.h"
+#include "dagpci.h"
+
+#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
+
+
+#ifndef TYPE_AAL5
+#define TYPE_AAL5 4
+#endif
+
+#ifndef TYPE_MC_HDLC
+#define TYPE_MC_HDLC 5
+#endif
+
+#ifndef TYPE_MC_RAW
+#define TYPE_MC_RAW 6
+#endif
+
+#ifndef TYPE_MC_ATM
+#define TYPE_MC_ATM 7
+#endif
+
+#ifndef TYPE_MC_RAW_CHANNEL
+#define TYPE_MC_RAW_CHANNEL 8
+#endif
+
+#ifndef TYPE_MC_AAL5
+#define TYPE_MC_AAL5 9
+#endif
+
+#ifndef TYPE_COLOR_HDLC_POS
+#define TYPE_COLOR_HDLC_POS 10
+#endif
+
+#ifndef TYPE_COLOR_ETH
+#define TYPE_COLOR_ETH 11
+#endif
+
+#ifndef TYPE_MC_AAL2
+#define TYPE_MC_AAL2 12
+#endif
+
+#ifndef TYPE_IP_COUNTER
+#define TYPE_IP_COUNTER 13
+#endif
+
+#ifndef TYPE_TCP_FLOW_COUNTER
+#define TYPE_TCP_FLOW_COUNTER 14
+#endif
+
+#ifndef TYPE_DSM_COLOR_HDLC_POS
+#define TYPE_DSM_COLOR_HDLC_POS 15
+#endif
+
+#ifndef TYPE_DSM_COLOR_ETH
+#define TYPE_DSM_COLOR_ETH 16
+#endif
+
+#ifndef TYPE_COLOR_MC_HDLC_POS
+#define TYPE_COLOR_MC_HDLC_POS 17
+#endif
+
+#ifndef TYPE_AAL2
+#define TYPE_AAL2 18
+#endif
+
+#ifndef TYPE_COLOR_HASH_POS
+#define TYPE_COLOR_HASH_POS 19
+#endif
+
+#ifndef TYPE_COLOR_HASH_ETH
+#define TYPE_COLOR_HASH_ETH 20
+#endif
+
+#ifndef TYPE_INFINIBAND
+#define TYPE_INFINIBAND 21
+#endif
+
+#ifndef TYPE_IPV4
+#define TYPE_IPV4 22
+#endif
+
+#ifndef TYPE_IPV6
+#define TYPE_IPV6 23
+#endif
+
+#ifndef TYPE_RAW_LINK
+#define TYPE_RAW_LINK 24
+#endif
+
+#ifndef TYPE_INFINIBAND_LINK
+#define TYPE_INFINIBAND_LINK 25
+#endif
+
+#ifndef TYPE_PAD
+#define TYPE_PAD 48
+#endif
-#define MIN_DAG_SNAPLEN 12
-#define MAX_DAG_SNAPLEN 2040
#define ATM_CELL_SIZE 52
#define ATM_HDR_SIZE 4
+/*
+ * A header containing additional MTP information.
+ */
+#define MTP2_SENT_OFFSET 0 /* 1 byte */
+#define MTP2_ANNEX_A_USED_OFFSET 1 /* 1 byte */
+#define MTP2_LINK_NUMBER_OFFSET 2 /* 2 bytes */
+#define MTP2_HDR_LEN 4 /* length of the header */
+
+#define MTP2_ANNEX_A_NOT_USED 0
+#define MTP2_ANNEX_A_USED 1
+#define MTP2_ANNEX_A_USED_UNKNOWN 2
+
/* SunATM pseudo header */
struct sunatm_hdr {
unsigned char flags; /* destination and traffic type */
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))
-/*
- * Swap byte ordering of unsigned long long timestamp on a big endian
- * machine.
- */
-#define SWAP_TS(ull) ((ull & 0xff00000000000000LL) >> 56) | \
- ((ull & 0x00ff000000000000LL) >> 40) | \
- ((ull & 0x0000ff0000000000LL) >> 24) | \
- ((ull & 0x000000ff00000000LL) >> 8) | \
- ((ull & 0x00000000ff000000LL) << 8) | \
- ((ull & 0x0000000000ff0000LL) << 24) | \
- ((ull & 0x000000000000ff00LL) << 40) | \
- ((ull & 0x00000000000000ffLL) << 56)
-
-
-#ifdef DAG_ONLY
-/* This code is required when compiling for a DAG device only. */
-#include "pcap-dag.h"
+#define MAX_DAG_PACKET 65536
-/* Replace dag function names with pcap equivalent. */
-#define dag_open_live pcap_open_live
-#define dag_platform_finddevs pcap_platform_finddevs
-#endif /* DAG_ONLY */
+static unsigned char TempPkt[MAX_DAG_PACKET];
static int dag_setfilter(pcap_t *p, struct bpf_program *fp);
static int dag_stats(pcap_t *p, struct pcap_stat *ps);
*/
static void
-dag_platform_close(pcap_t *p)
+dag_platform_cleanup(pcap_t *p)
{
+ struct pcap_dag *pd = p->priv;
-#ifdef linux
- if (p != NULL && p->md.device != NULL) {
- if(dag_stop(p->fd) < 0)
- fprintf(stderr,"dag_stop %s: %s\n", p->md.device, strerror(errno));
- if(dag_close(p->fd) < 0)
- fprintf(stderr,"dag_close %s: %s\n", p->md.device, strerror(errno));
-
- free(p->md.device);
- }
+#ifdef HAVE_DAG_STREAMS_API
+ 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, pd->dag_stream) < 0)
+ fprintf(stderr,"dag_detach_stream: %s\n", strerror(errno));
#else
- if (p != NULL) {
- if(dag_stop(p->fd) < 0)
- fprintf(stderr,"dag_stop: %s\n", strerror(errno));
+ if(dag_stop(p->fd) < 0)
+ fprintf(stderr,"dag_stop: %s\n", strerror(errno));
+#endif /* HAVE_DAG_STREAMS_API */
+ if(p->fd != -1) {
if(dag_close(p->fd) < 0)
fprintf(stderr,"dag_close: %s\n", strerror(errno));
+ p->fd = -1;
}
-#endif
delete_pcap_dag(p);
+ pcap_cleanup_live_common(p);
/* Note: don't need to call close(p->fd) here as dag_close(p->fd) does this. */
}
{
while (pcap_dags != NULL) {
if (pcap_dags->pid == getpid()) {
- dag_platform_close(pcap_dags->p);
+ if (pcap_dags->p != NULL)
+ dag_platform_cleanup(pcap_dags->p);
} else {
delete_pcap_dag(pcap_dags->p);
}
return 0;
}
+static unsigned int
+dag_erf_ext_header_count(uint8_t * erf, size_t len)
+{
+ uint32_t hdr_num = 0;
+ uint8_t hdr_type;
+
+ /* basic sanity checks */
+ if ( erf == NULL )
+ return 0;
+ if ( len < 16 )
+ return 0;
+
+ /* check if we have any extension headers */
+ if ( (erf[8] & 0x80) == 0x00 )
+ return 0;
+
+ /* loop over the extension headers */
+ do {
+
+ /* sanity check we have enough bytes */
+ if ( len < (24 + (hdr_num * 8)) )
+ return hdr_num;
+
+ /* get the header type */
+ hdr_type = erf[(16 + (hdr_num * 8))];
+ hdr_num++;
+
+ } while ( hdr_type & 0x80 );
+
+ return hdr_num;
+}
+
/*
* Read at most max_packets from the capture stream and call the callback
* for each of them. Returns the number of packets handled, -1 if an
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;
+ unsigned int ticks_per_second;
- for (;;)
- {
- /* Get the next bufferful of packets (if necessary). */
- while (p->md.dag_mem_top - p->md.dag_mem_bottom < dag_record_size) {
-
+ /* Get the next bufferful of packets (if necessary). */
+ while (pd->dag_mem_top - pd->dag_mem_bottom < dag_record_size) {
+
+ /*
+ * Has "pcap_breakloop()" been called?
+ */
+ if (p->break_loop) {
/*
- * Has "pcap_breakloop()" been called?
+ * Yes - clear the flag that indicates that
+ * it has, and return -2 to indicate that
+ * we were told to break out of the loop.
*/
- if (p->break_loop) {
- /*
- * Yes - clear the flag that indicates that
- * it has, and return -2 to indicate that
- * we were told to break out of the loop.
- */
- p->break_loop = 0;
- return -2;
- }
+ p->break_loop = 0;
+ return -2;
+ }
- p->md.dag_mem_top = dag_offset(p->fd, &(p->md.dag_mem_bottom), flags);
- if (nonblocking && (p->md.dag_mem_top - p->md.dag_mem_bottom < dag_record_size))
- {
- /* Pcap is configured to process only available packets, and there aren't any. */
- return 0;
- }
+#ifdef HAVE_DAG_STREAMS_API
+ /* dag_advance_stream() will block (unless nonblock is called)
+ * until 64kB of data has accumulated.
+ * If to_ms is set, it will timeout before 64kB has accumulated.
+ * We wait for 64kB because processing a few packets at a time
+ * can cause problems at high packet rates (>200kpps) due
+ * to inefficiencies.
+ * This does mean if to_ms is not specified the capture may 'hang'
+ * for long periods if the data rate is extremely slow (<64kB/sec)
+ * If non-block is specified it will return immediately. The user
+ * is then responsible for efficiency.
+ */
+ 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 */
+ pd->dag_mem_top = dag_offset(p->fd, &(pd->dag_mem_bottom), flags);
+#endif /* HAVE_DAG_STREAMS_API */
+
+ 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 &&
+ 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) {
-
- unsigned short packet_len = 0;
- int caplen = 0;
- struct pcap_pkthdr pcap_header;
-
- dag_record_t *header = (dag_record_t *)(p->md.dag_mem_base + p->md.dag_mem_bottom);
- u_char *dp = ((u_char *)header) + dag_record_size;
- unsigned short rlen;
-
+
+ }
+
+ /* Process the packets. */
+ 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 *)(pd->dag_mem_bottom);
+#else
+ 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; */
+ unsigned short rlen;
+
+ /*
+ * Has "pcap_breakloop()" been called?
+ */
+ if (p->break_loop) {
/*
- * Has "pcap_breakloop()" been called?
+ * Yes - clear the flag that indicates that
+ * it has, and return -2 to indicate that
+ * we were told to break out of the loop.
*/
- if (p->break_loop) {
- /*
- * Yes - clear the flag that indicates that
- * it has, and return -2 to indicate that
- * we were told to break out of the loop.
- */
- p->break_loop = 0;
- return -2;
+ p->break_loop = 0;
+ return -2;
+ }
+
+ rlen = ntohs(header->rlen);
+ if (rlen < dag_record_size)
+ {
+ strncpy(p->errbuf, "dag_read: record too small", PCAP_ERRBUF_SIZE);
+ return -1;
+ }
+ pd->dag_mem_bottom += rlen;
+
+ /* Count lost packets. */
+ switch((header->type & 0x7f)) {
+ /* in these types the color value overwrites the lctr */
+ case TYPE_COLOR_HDLC_POS:
+ case TYPE_COLOR_ETH:
+ case TYPE_DSM_COLOR_HDLC_POS:
+ case TYPE_DSM_COLOR_ETH:
+ case TYPE_COLOR_MC_HDLC_POS:
+ case TYPE_COLOR_HASH_ETH:
+ case TYPE_COLOR_HASH_POS:
+ break;
+
+ default:
+ if (header->lctr) {
+ if (pd->stat.ps_drop > (UINT_MAX - ntohs(header->lctr))) {
+ pd->stat.ps_drop = UINT_MAX;
+ } else {
+ pd->stat.ps_drop += ntohs(header->lctr);
+ }
}
-
- rlen = ntohs(header->rlen);
- if (rlen < dag_record_size)
- {
- strncpy(p->errbuf, "dag_read: record too small", PCAP_ERRBUF_SIZE);
- return -1;
+ }
+
+ if ((header->type & 0x7f) == TYPE_PAD) {
+ continue;
+ }
+
+ num_ext_hdr = dag_erf_ext_header_count(dp, rlen);
+
+ /* ERF encapsulation */
+ /* The Extensible Record Format is not dropped for this kind of encapsulation,
+ * and will be handled as a pseudo header by the decoding application.
+ * The information carried in the ERF header and in the optional subheader (if present)
+ * could be merged with the libpcap information, to offer a better decoding.
+ * The packet length is
+ * o the length of the packet on the link (header->wlen),
+ * o plus the length of the ERF header (dag_record_size), as the length of the
+ * pseudo header will be adjusted during the decoding,
+ * o plus the length of the optional subheader (if present).
+ *
+ * The capture length is header.rlen and the byte stuffing for alignment will be dropped
+ * if the capture length is greater than the packet length.
+ */
+ if (p->linktype == DLT_ERF) {
+ packet_len = ntohs(header->wlen) + dag_record_size;
+ caplen = rlen;
+ switch ((header->type & 0x7f)) {
+ case TYPE_MC_AAL5:
+ case TYPE_MC_ATM:
+ case TYPE_MC_HDLC:
+ case TYPE_MC_RAW_CHANNEL:
+ case TYPE_MC_RAW:
+ case TYPE_MC_AAL2:
+ case TYPE_COLOR_MC_HDLC_POS:
+ packet_len += 4; /* MC header */
+ break;
+
+ case TYPE_COLOR_HASH_ETH:
+ case TYPE_DSM_COLOR_ETH:
+ case TYPE_COLOR_ETH:
+ case TYPE_ETH:
+ packet_len += 2; /* ETH header */
+ break;
+ } /* switch type */
+
+ /* Include ERF extension headers */
+ packet_len += (8 * num_ext_hdr);
+
+ if (caplen > packet_len) {
+ caplen = packet_len;
}
- p->md.dag_mem_bottom += rlen;
+ } else {
+ /* Other kind of encapsulation according to the header Type */
- switch(header->type) {
- case TYPE_AAL5:
+ /* Skip over generic ERF header */
+ dp += dag_record_size;
+ /* Skip over extension headers */
+ dp += 8 * num_ext_hdr;
+
+ switch((header->type & 0x7f)) {
case TYPE_ATM:
+ case TYPE_AAL5:
if (header->type == TYPE_AAL5) {
- packet_len = ntohs(header->wlen);
+ packet_len = ntohs(header->wlen);
caplen = rlen - dag_record_size;
- } else {
+ }
+ case TYPE_MC_ATM:
+ if (header->type == TYPE_MC_ATM) {
+ caplen = packet_len = ATM_CELL_SIZE;
+ dp+=4;
+ }
+ case TYPE_MC_AAL5:
+ if (header->type == TYPE_MC_AAL5) {
+ packet_len = ntohs(header->wlen);
+ caplen = rlen - dag_record_size - 4;
+ dp+=4;
+ }
+ /* Skip over extension headers */
+ caplen -= (8 * num_ext_hdr);
+
+ if (header->type == TYPE_ATM) {
caplen = packet_len = ATM_CELL_SIZE;
}
if (p->linktype == DLT_SUNATM) {
struct sunatm_hdr *sunatm = (struct sunatm_hdr *)dp;
unsigned long rawatm;
-
- rawatm = ntohl(*((unsigned long *)dp));
- sunatm->vci = htons((rawatm >> 4) & 0xffff);
+
+ rawatm = ntohl(*((unsigned long *)dp));
+ sunatm->vci = htons((rawatm >> 4) & 0xffff);
sunatm->vpi = (rawatm >> 20) & 0x00ff;
- sunatm->flags = ((header->flags.iface & 1) ? 0x80 : 0x00) |
+ sunatm->flags = ((header->flags.iface & 1) ? 0x80 : 0x00) |
((sunatm->vpi == 0 && sunatm->vci == htons(5)) ? 6 :
- ((sunatm->vpi == 0 && sunatm->vci == htons(16)) ? 5 :
- ((dp[ATM_HDR_SIZE] == 0xaa &&
- dp[ATM_HDR_SIZE+1] == 0xaa &&
- dp[ATM_HDR_SIZE+2] == 0x03) ? 2 : 1)));
+ ((sunatm->vpi == 0 && sunatm->vci == htons(16)) ? 5 :
+ ((dp[ATM_HDR_SIZE] == 0xaa &&
+ dp[ATM_HDR_SIZE+1] == 0xaa &&
+ dp[ATM_HDR_SIZE+2] == 0x03) ? 2 : 1)));
} else {
packet_len -= ATM_HDR_SIZE;
}
break;
+ case TYPE_COLOR_HASH_ETH:
+ case TYPE_DSM_COLOR_ETH:
+ case TYPE_COLOR_ETH:
case TYPE_ETH:
- packet_len = ntohs(header->wlen);
- packet_len -= (p->md.dag_fcs_bits >> 3);
+ packet_len = ntohs(header->wlen);
+ packet_len -= (pd->dag_fcs_bits >> 3);
caplen = rlen - dag_record_size - 2;
+ /* Skip over extension headers */
+ caplen -= (8 * num_ext_hdr);
if (caplen > packet_len) {
caplen = packet_len;
}
dp += 2;
break;
+ case TYPE_COLOR_HASH_POS:
+ case TYPE_DSM_COLOR_HDLC_POS:
+ case TYPE_COLOR_HDLC_POS:
case TYPE_HDLC_POS:
- packet_len = ntohs(header->wlen);
- packet_len -= (p->md.dag_fcs_bits >> 3);
+ packet_len = ntohs(header->wlen);
+ packet_len -= (pd->dag_fcs_bits >> 3);
caplen = rlen - dag_record_size;
+ /* Skip over extension headers */
+ caplen -= (8 * num_ext_hdr);
if (caplen > packet_len) {
caplen = packet_len;
}
break;
- }
-
- if (caplen > p->snapshot)
- caplen = p->snapshot;
- /* Count lost packets. */
- if (header->lctr) {
- if (p->md.stat.ps_drop > (UINT_MAX - ntohs(header->lctr))) {
- p->md.stat.ps_drop = UINT_MAX;
- } else {
- p->md.stat.ps_drop += ntohs(header->lctr);
+ case TYPE_COLOR_MC_HDLC_POS:
+ case TYPE_MC_HDLC:
+ packet_len = ntohs(header->wlen);
+ packet_len -= (pd->dag_fcs_bits >> 3);
+ caplen = rlen - dag_record_size - 4;
+ /* Skip over extension headers */
+ caplen -= (8 * num_ext_hdr);
+ if (caplen > packet_len) {
+ caplen = packet_len;
}
- }
-
- /* Run the packet filter if there is one. */
- if ((p->fcode.bf_insns == NULL) || bpf_filter(p->fcode.bf_insns, dp, packet_len, caplen)) {
-
- /* convert between timestamp formats */
- register unsigned long long ts;
-
- if (IS_BIGENDIAN()) {
- ts = SWAP_TS(header->ts);
- } else {
- ts = header->ts;
+ /* jump the MC_HDLC_HEADER */
+ dp += 4;
+#ifdef DLT_MTP2_WITH_PHDR
+ if (p->linktype == DLT_MTP2_WITH_PHDR) {
+ /* Add the MTP2 Pseudo Header */
+ caplen += MTP2_HDR_LEN;
+ packet_len += MTP2_HDR_LEN;
+
+ TempPkt[MTP2_SENT_OFFSET] = 0;
+ TempPkt[MTP2_ANNEX_A_USED_OFFSET] = MTP2_ANNEX_A_USED_UNKNOWN;
+ *(TempPkt+MTP2_LINK_NUMBER_OFFSET) = ((header->rec.mc_hdlc.mc_header>>16)&0x01);
+ *(TempPkt+MTP2_LINK_NUMBER_OFFSET+1) = ((header->rec.mc_hdlc.mc_header>>24)&0xff);
+ memcpy(TempPkt+MTP2_HDR_LEN, dp, caplen);
+ dp = TempPkt;
}
+#endif
+ break;
- pcap_header.ts.tv_sec = ts >> 32;
- ts = (ts & 0xffffffffULL) * 1000000;
- ts += 0x80000000; /* rounding */
- pcap_header.ts.tv_usec = ts >> 32;
- if (pcap_header.ts.tv_usec >= 1000000) {
- pcap_header.ts.tv_usec -= 1000000;
- pcap_header.ts.tv_sec++;
+ case TYPE_IPV4:
+ case TYPE_IPV6:
+ packet_len = ntohs(header->wlen);
+ caplen = rlen - dag_record_size;
+ /* Skip over extension headers */
+ caplen -= (8 * num_ext_hdr);
+ if (caplen > packet_len) {
+ caplen = packet_len;
}
+ break;
- /* Fill in our own header data */
- pcap_header.caplen = caplen;
- pcap_header.len = packet_len;
-
- /* Count the packet. */
- p->md.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)
- {
- /* Reached the user-specified limit. */
- return cnt;
- }
+ /* These types have no matching 'native' DLT, but can be used with DLT_ERF above */
+ case TYPE_MC_RAW:
+ case TYPE_MC_RAW_CHANNEL:
+ case TYPE_IP_COUNTER:
+ case TYPE_TCP_FLOW_COUNTER:
+ case TYPE_INFINIBAND:
+ case TYPE_RAW_LINK:
+ case TYPE_INFINIBAND_LINK:
+ default:
+ /* Unhandled ERF type.
+ * Ignore rather than generating error
+ */
+ continue;
+ } /* switch type */
+
+ } /* ERF encapsulation */
+
+ if (caplen > p->snapshot)
+ caplen = p->snapshot;
+
+ /* Run the packet filter if there is one. */
+ if ((p->fcode.bf_insns == NULL) || bpf_filter(p->fcode.bf_insns, dp, packet_len, caplen)) {
+
+ /* convert between timestamp formats */
+ register unsigned long long ts;
+
+ if (IS_BIGENDIAN()) {
+ ts = SWAPLL(header->ts);
+ } else {
+ ts = header->ts;
}
- }
- if (nonblocking || processed)
- {
- return processed;
+ switch (p->opt.tstamp_precision) {
+ case PCAP_TSTAMP_PRECISION_NANO:
+ ticks_per_second = 1000000000;
+ break;
+ case PCAP_TSTAMP_PRECISION_MICRO:
+ default:
+ ticks_per_second = 1000000;
+ break;
+
+ }
+ pcap_header.ts.tv_sec = ts >> 32;
+ ts = (ts & 0xffffffffULL) * ticks_per_second;
+ ts += 0x80000000; /* rounding */
+ pcap_header.ts.tv_usec = ts >> 32;
+ if (pcap_header.ts.tv_usec >= ticks_per_second) {
+ pcap_header.ts.tv_usec -= ticks_per_second;
+ pcap_header.ts.tv_sec++;
+ }
+
+ /* Fill in our own header data */
+ pcap_header.caplen = caplen;
+ pcap_header.len = packet_len;
+
+ /* Count the packet. */
+ 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 && !PACKET_COUNT_IS_UNLIMITED(cnt))
+ {
+ /* Reached the user-specified limit. */
+ return cnt;
+ }
}
}
-
+
return processed;
}
/*
* Get a handle for a live capture from the given DAG device. Passing a NULL
* device will result in a failure. The promisc flag is ignored because DAG
- * cards are always promiscuous. The to_ms parameter is also ignored as it is
- * not supported in hardware.
- *
+ * cards are always promiscuous. The to_ms parameter is used in setting the
+ * API polling parameters.
+ *
+ * snaplen is now also ignored, until we get per-stream slen support. Set
+ * slen with approprite DAG tool BEFORE pcap_activate().
+ *
* See also pcap(3).
*/
-pcap_t *
-dag_open_live(const char *device, int snaplen, int promisc, int to_ms, char *ebuf)
+static int dag_activate(pcap_t* handle)
{
+ struct pcap_dag *handlep = handle->priv;
+#if 0
char conf[30]; /* dag configure string */
- pcap_t *handle;
+#endif
char *s;
int n;
daginf_t* daginf;
-
+ char * newDev = NULL;
+ char * device = handle->opt.device;
+#ifdef HAVE_DAG_STREAMS_API
+ uint32_t mindata;
+ struct timeval maxwait;
+ struct timeval poll;
+#endif
+
if (device == NULL) {
- snprintf(ebuf, PCAP_ERRBUF_SIZE, "device is NULL: %s", pcap_strerror(errno));
- return NULL;
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "device is NULL: %s", pcap_strerror(errno));
+ return -1;
}
- /* Allocate a handle for this session. */
- handle = malloc(sizeof(*handle));
- if (handle == NULL) {
- snprintf(ebuf, PCAP_ERRBUF_SIZE, "malloc %s: %s", device, pcap_strerror(errno));
- return NULL;
- }
-
/* Initialize some components of the pcap structure. */
-
- memset(handle, 0, sizeof(*handle));
-
- if (strstr(device, "/dev") == NULL) {
- char * newDev = (char *)malloc(strlen(device) + 6);
- newDev[0] = '\0';
- strcat(newDev, "/dev/");
- strcat(newDev,device);
- device = newDev;
- } else {
- device = strdup(device);
+
+#ifdef HAVE_DAG_STREAMS_API
+ newDev = (char *)malloc(strlen(device) + 16);
+ if (newDev == NULL) {
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Can't allocate string for device name: %s", pcap_strerror(errno));
+ goto fail;
}
- if (device == NULL) {
- snprintf(ebuf, PCAP_ERRBUF_SIZE, "str_dup: %s\n", pcap_strerror(errno));
+ /* Parse input name to get dag device and stream number if provided */
+ if (dag_parse_name(device, newDev, strlen(device) + 16, &handlep->dag_stream) < 0) {
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "dag_parse_name: %s", pcap_strerror(errno));
goto fail;
}
+ device = newDev;
+
+ if (handlep->dag_stream%2) {
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "dag_parse_name: tx (even numbered) streams not supported for capture");
+ goto fail;
+ }
+#else
+ if (strncmp(device, "/dev/", 5) != 0) {
+ newDev = (char *)malloc(strlen(device) + 5);
+ if (newDev == NULL) {
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Can't allocate string for device name: %s", pcap_strerror(errno));
+ goto fail;
+ }
+ strcpy(newDev, "/dev/");
+ strcat(newDev, device);
+ device = newDev;
+ }
+#endif /* HAVE_DAG_STREAMS_API */
/* setup device parameters */
if((handle->fd = dag_open((char *)device)) < 0) {
- snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_open %s: %s", device, pcap_strerror(errno));
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "dag_open %s: %s", device, pcap_strerror(errno));
goto fail;
}
+#ifdef HAVE_DAG_STREAMS_API
+ /* Open requested stream. Can fail if already locked or on error */
+ if (dag_attach_stream(handle->fd, handlep->dag_stream, 0, 0) < 0) {
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "dag_attach_stream: %s", 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, handlep->dag_stream,
+ &mindata, &maxwait, &poll) < 0) {
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "dag_get_stream_poll: %s", pcap_strerror(errno));
+ goto faildetach;
+ }
+
+ 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 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->opt.timeout/1000;
+ maxwait.tv_usec = (handle->opt.timeout%1000) * 1000;
+
+ if (dag_set_stream_poll(handle->fd, handlep->dag_stream,
+ mindata, &maxwait, &poll) < 0) {
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "dag_set_stream_poll: %s", pcap_strerror(errno));
+ goto faildetach;
+ }
+
+#else
+ if((handlep->dag_mem_base = dag_mmap(handle->fd)) == MAP_FAILED) {
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,"dag_mmap %s: %s", device, pcap_strerror(errno));
+ goto failclose;
+ }
+
+#endif /* HAVE_DAG_STREAMS_API */
+
+ /* XXX Not calling dag_configure() to set slen; this is unsafe in
+ * multi-stream environments as the gpp config is global.
+ * Once the firmware provides 'per-stream slen' this can be supported
+ * again via the Config API without side-effects */
+#if 0
/* set the card snap length to the specified snaplen parameter */
- if (snaplen == 0 || snaplen > MAX_DAG_SNAPLEN) {
- snaplen = MAX_DAG_SNAPLEN;
+ /* This is a really bad idea, as different cards have different
+ * valid slen ranges. Should fix in Config API. */
+ if (handle->snapshot == 0 || handle->snapshot > MAX_DAG_SNAPLEN) {
+ handle->snapshot = MAX_DAG_SNAPLEN;
} else if (snaplen < MIN_DAG_SNAPLEN) {
- snaplen = MIN_DAG_SNAPLEN;
+ handle->snapshot = MIN_DAG_SNAPLEN;
}
/* snap len has to be a multiple of 4 */
- snprintf(conf, 30, "varlen slen=%d", (snaplen + 3) & ~3);
+ pcap_snprintf(conf, 30, "varlen slen=%d", (snaplen + 3) & ~3);
if(dag_configure(handle->fd, conf) < 0) {
- snprintf(ebuf, PCAP_ERRBUF_SIZE,"dag_configure %s: %s\n", device, pcap_strerror(errno));
- goto fail;
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,"dag_configure %s: %s", device, pcap_strerror(errno));
+ goto faildetach;
}
-
- if((handle->md.dag_mem_base = dag_mmap(handle->fd)) == MAP_FAILED) {
- snprintf(ebuf, PCAP_ERRBUF_SIZE,"dag_mmap %s: %s\n", device, pcap_strerror(errno));
- goto fail;
+#endif
+
+#ifdef HAVE_DAG_STREAMS_API
+ if(dag_start_stream(handle->fd, handlep->dag_stream) < 0) {
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "dag_start_stream %s: %s", device, pcap_strerror(errno));
+ goto faildetach;
}
-
+#else
if(dag_start(handle->fd) < 0) {
- snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_start %s: %s\n", device, pcap_strerror(errno));
- goto fail;
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "dag_start %s: %s", device, pcap_strerror(errno));
+ goto failclose;
}
+#endif /* HAVE_DAG_STREAMS_API */
/*
* Important! You have to ensure bottom is properly
* 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;
- handle->md.dag_fcs_bits = 32;
+ handlep->dag_mem_bottom = 0;
+ handlep->dag_mem_top = 0;
- /* Query the card first for special cases. */
+ /*
+ * Find out how many FCS bits we should strip.
+ * First, query the card to see if it strips the FCS.
+ */
daginf = dag_info(handle->fd);
- if ((0x4200 == daginf->device_code) || (0x4230 == daginf->device_code))
- {
+ 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;
- /* Then 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;
- } else {
- snprintf(ebuf, PCAP_ERRBUF_SIZE,
- "pcap_open_live %s: bad ERF_FCS_BITS value (%d) in environment\n", device, n);
- goto fail;
+ /* Note that no FCS will be supplied. */
+ handle->linktype_ext = LT_FCS_DATALINK_EXT(0);
+ } else {
+ /*
+ * Start out assuming it's 32 bits.
+ */
+ 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) {
+ handlep->dag_fcs_bits = n;
+ } else {
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
+ "pcap_activate %s: bad ERF_FCS_BITS value (%d) in environment", device, n);
+ goto failstop;
+ }
+ }
+
+ /*
+ * Did the user request that they not be stripped?
+ */
+ 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(handlep->dag_fcs_bits/16);
+
+ /* And don't strip them. */
+ handlep->dag_fcs_bits = 0;
}
}
- handle->snapshot = snaplen;
- /*handle->md.timeout = to_ms; */
+ handlep->dag_timeout = handle->opt.timeout;
handle->linktype = -1;
- if (dag_get_datalink(handle) < 0) {
- strcpy(ebuf, handle->errbuf);
- goto fail;
- }
-
+ if (dag_get_datalink(handle) < 0)
+ goto failstop;
+
handle->bufsize = 0;
if (new_pcap_dag(handle) < 0) {
- snprintf(ebuf, PCAP_ERRBUF_SIZE, "new_pcap_dag %s: %s\n", device, pcap_strerror(errno));
- goto fail;
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "new_pcap_dag %s: %s", device, pcap_strerror(errno));
+ goto failstop;
}
/*
- * "select()" and "poll()" don't (yet) work on DAG device descriptors.
+ * "select()" and "poll()" don't work on DAG device descriptors.
*/
handle->selectable_fd = -1;
-#ifdef linux
- handle->md.device = (char *)device;
-#else
- free((char *)device);
- device = NULL;
-#endif
+ if (newDev != NULL) {
+ free((char *)newDev);
+ }
handle->read_op = dag_read;
handle->inject_op = dag_inject;
handle->setfilter_op = dag_setfilter;
+ handle->setdirection_op = NULL; /* Not implemented.*/
handle->set_datalink_op = dag_set_datalink;
handle->getnonblock_op = pcap_getnonblock_fd;
handle->setnonblock_op = dag_setnonblock;
handle->stats_op = dag_stats;
- handle->close_op = dag_platform_close;
+ handle->cleanup_op = dag_platform_cleanup;
+ 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, handlep->dag_stream) < 0) {
+ fprintf(stderr,"dag_stop_stream: %s\n", strerror(errno));
+ }
- return handle;
+faildetach:
+ if (dag_detach_stream(handle->fd, handlep->dag_stream) < 0)
+ fprintf(stderr,"dag_detach_stream: %s\n", strerror(errno));
+#else
+failstop:
+ if (dag_stop(handle->fd) < 0)
+ fprintf(stderr,"dag_stop: %s\n", strerror(errno));
+#endif /* HAVE_DAG_STREAMS_API */
+
+failclose:
+ if (dag_close(handle->fd) < 0)
+ fprintf(stderr,"dag_close: %s\n", strerror(errno));
+ delete_pcap_dag(handle);
fail:
- if (device != NULL) {
- free((char *)device);
+ pcap_cleanup_live_common(handle);
+ if (newDev != NULL) {
+ free((char *)newDev);
}
- if (handle != NULL) {
- /*
- * Get rid of any link-layer type list we allocated.
- */
- if (handle->dlt_list != NULL) {
- free(handle->dlt_list);
- }
- free(handle);
+
+ return PCAP_ERROR;
+}
+
+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
- return NULL;
+ /* OK, it's probably ours. */
+ *is_ours = 1;
+
+ p = pcap_create_common(ebuf, sizeof (struct pcap_dag));
+ if (p == NULL)
+ return NULL;
+
+ p->activate_op = dag_activate;
+
+ /*
+ * We claim that we support microsecond and nanosecond time
+ * stamps.
+ *
+ * XXX Our native precision is 2^-32s, but libpcap doesn't support
+ * power of two precisions yet. We can convert to either MICRO or NANO.
+ */
+ p->tstamp_precision_count = 2;
+ p->tstamp_precision_list = malloc(2 * sizeof(u_int));
+ if (p->tstamp_precision_list == NULL) {
+ pcap_snprintf(ebuf, PCAP_ERRBUF_SIZE, "malloc: %s",
+ pcap_strerror(errno));
+ pcap_close(p);
+ return NULL;
+ }
+ p->tstamp_precision_list[0] = PCAP_TSTAMP_PRECISION_MICRO;
+ p->tstamp_precision_list[1] = PCAP_TSTAMP_PRECISION_NANO;
+ return p;
}
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;*/
-
- *ps = p->md.stat;
-
+ /*pd->stat.ps_recv = 0;*/
+ /*pd->stat.ps_drop = 0;*/
+
+ *ps = pd->stat;
+
return 0;
}
/*
- * Get from "/proc/dag" all interfaces listed there; if they're
- * already in the list of interfaces we have, that won't add another
- * instance, but if they're not, that'll add them.
- *
- * We don't bother getting any addresses for them.
+ * Previously we just generated a list of all possible names and let
+ * pcap_add_if() attempt to open each one, but with streams this adds up
+ * to 81 possibilities which is inefficient.
*
- * We also don't fail if we couldn't open "/proc/dag"; we just leave
- * the list of interfaces as is.
+ * Since we know more about the devices we can prune the tree here.
+ * pcap_add_if() will still retest each device but the total number of
+ * 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)
{
- FILE *proc_dag_f;
- char linebuf[512];
- int linenum;
- unsigned char *p;
- char name[512]; /* XXX - pick a size */
- char *q;
+ char name[12]; /* XXX - pick a size */
int ret = 0;
-
- /* Quick exit if /proc/dag not readable */
- proc_dag_f = fopen("/proc/dag", "r");
- if (proc_dag_f == NULL)
- {
- int i;
- char dev[16] = "dagx";
-
- for (i = '0'; ret == 0 && i <= '9'; i++) {
- dev[3] = i;
- if (pcap_add_if(devlistp, dev, 0, NULL, errbuf) == -1) {
+ int c;
+ char dagname[DAGNAME_BUFSIZE];
+ int dagstream;
+ int dagfd;
+ dag_card_inf_t *inf;
+ char *description;
+
+ /* Try all the DAGs 0-DAG_MAX_BOARDS */
+ for (c = 0; c < DAG_MAX_BOARDS; c++) {
+ pcap_snprintf(name, 12, "dag%d", c);
+ if (-1 == dag_parse_name(name, dagname, DAGNAME_BUFSIZE, &dagstream))
+ {
+ return -1;
+ }
+ description = NULL;
+ if ( (dagfd = dag_open(dagname)) >= 0 ) {
+ if ((inf = dag_pciinfo(dagfd)))
+ description = dag_device_name(inf->device_code, 1);
+ if (pcap_add_if(devlistp, name, 0, description, errbuf) == -1) {
/*
* Failure.
*/
ret = -1;
}
+#ifdef HAVE_DAG_STREAMS_API
+ {
+ int stream, rxstreams;
+ rxstreams = dag_rx_get_stream_count(dagfd);
+ for(stream=0;stream<DAG_STREAM_MAX;stream+=2) {
+ if (0 == dag_attach_stream(dagfd, stream, 0, 0)) {
+ dag_detach_stream(dagfd, stream);
+
+ pcap_snprintf(name, 10, "dag%d:%d", c, stream);
+ if (pcap_add_if(devlistp, name, 0, description, errbuf) == -1) {
+ /*
+ * Failure.
+ */
+ ret = -1;
+ }
+
+ rxstreams--;
+ if(rxstreams <= 0) {
+ break;
+ }
+ }
+ }
+ }
+#endif /* HAVE_DAG_STREAMS_API */
+ dag_close(dagfd);
}
- return (ret);
- }
-
- for (linenum = 1; fgets(linebuf, sizeof linebuf, proc_dag_f) != NULL; linenum++) {
-
- /*
- * Skip the first two lines - they're headers.
- */
- if (linenum <= 2)
- continue;
-
- p = &linebuf[0];
-
- if (*p == '\0' || *p == '\n' || *p != 'D')
- continue; /* not a Dag line */
-
- /*
- * Get the interface name.
- */
- q = &name[0];
- while (*p != '\0' && *p != ':') {
- if (*p != ' ')
- *q++ = tolower(*p++);
- else
- p++;
- }
- *q = '\0';
-
- /*
- * Add an entry for this interface, with no addresses.
- */
- p[strlen(p) - 1] = '\0'; /* get rid of \n */
- if (pcap_add_if(devlistp, name, 0, strdup(p + 2), errbuf) == -1) {
- /*
- * Failure.
- */
- ret = -1;
- break;
- }
- }
- if (ret != -1) {
- /*
- * Well, we didn't fail for any other reason; did we
- * fail due to an error reading the file?
- */
- if (ferror(proc_dag_f)) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "Error reading /proc/dag: %s",
- pcap_strerror(errno));
- ret = -1;
- }
}
-
- (void)fclose(proc_dag_f);
return (ret);
}
/* Make our private copy of the filter */
- if (install_bpf_program(p, fp) < 0) {
- snprintf(p->errbuf, sizeof(p->errbuf),
- "malloc: %s", pcap_strerror(errno));
+ 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);
+#ifdef HAVE_DAG_STREAMS_API
+ {
+ uint32_t mindata;
+ struct timeval maxwait;
+ struct timeval poll;
+
+ if (dag_get_stream_poll(p->fd, pd->dag_stream,
+ &mindata, &maxwait, &poll) < 0) {
+ pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, "dag_get_stream_poll: %s", pcap_strerror(errno));
+ return -1;
+ }
+ /* 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!
+ */
+ if(nonblock)
+ mindata = 0;
+ else
+ mindata = 65536;
+
+ if (dag_set_stream_poll(p->fd, pd->dag_stream,
+ mindata, &maxwait, &poll) < 0) {
+ pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, "dag_set_stream_poll: %s", 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)
{
- int daglinktype;
+ struct pcap_dag *pd = p->priv;
+ int index=0, dlt_index=0;
+ uint8_t types[255];
+
+ memset(types, 0, 255);
+
+ if (p->dlt_list == NULL && (p->dlt_list = malloc(255*sizeof(*(p->dlt_list)))) == NULL) {
+ (void)pcap_snprintf(p->errbuf, sizeof(p->errbuf), "malloc: %s", pcap_strerror(errno));
+ return (-1);
+ }
+
+ p->linktype = 0;
+
+#ifdef HAVE_DAG_GET_STREAM_ERF_TYPES
+ /* Get list of possible ERF types for this card */
+ if (dag_get_stream_erf_types(p->fd, pd->dag_stream, types, 255) < 0) {
+ pcap_snprintf(p->errbuf, sizeof(p->errbuf), "dag_get_stream_erf_types: %s", pcap_strerror(errno));
+ return (-1);
+ }
+
+ while (types[index]) {
- if (p->dlt_list == NULL && (p->dlt_list = malloc(2*sizeof(*(p->dlt_list)))) == NULL) {
- (void)snprintf(p->errbuf, sizeof(p->errbuf), "malloc: %s", pcap_strerror(errno));
+#elif defined HAVE_DAG_GET_ERF_TYPES
+ /* Get list of possible ERF types for this card */
+ if (dag_get_erf_types(p->fd, types, 255) < 0) {
+ pcap_snprintf(p->errbuf, sizeof(p->errbuf), "dag_get_erf_types: %s", pcap_strerror(errno));
return (-1);
}
+ while (types[index]) {
+#else
/* Check the type through a dagapi call. */
- daglinktype = dag_linktype(p->fd);
+ types[index] = dag_linktype(p->fd);
- switch(daglinktype) {
+ {
+#endif
+ switch((types[index] & 0x7f)) {
- case TYPE_HDLC_POS:
- if (p->dlt_list != NULL) {
- p->dlt_count = 2;
- p->dlt_list[0] = DLT_CHDLC;
- p->dlt_list[1] = DLT_PPP_SERIAL;
- }
- p->linktype = DLT_CHDLC;
- break;
+ case TYPE_HDLC_POS:
+ case TYPE_COLOR_HDLC_POS:
+ case TYPE_DSM_COLOR_HDLC_POS:
+ case TYPE_COLOR_HASH_POS:
- case TYPE_ETH:
- /*
- * This is (presumably) a real Ethernet capture; give it a
- * link-layer-type list with DLT_EN10MB and DLT_DOCSIS, so
- * that an application can let you choose it, in case you're
- * capturing DOCSIS traffic that a Cisco Cable Modem
- * Termination System is putting out onto an Ethernet (it
- * doesn't put an Ethernet header onto the wire, it puts raw
- * DOCSIS frames out on the wire inside the low-level
- * Ethernet framing).
- */
- if (p->dlt_list != NULL) {
- p->dlt_count = 2;
- p->dlt_list[0] = DLT_EN10MB;
- p->dlt_list[1] = DLT_DOCSIS;
- }
- p->linktype = DLT_EN10MB;
- break;
-
- case TYPE_AAL5:
- case TYPE_ATM:
- if (p->dlt_list != NULL) {
- p->dlt_count = 2;
- p->dlt_list[0] = DLT_ATM_RFC1483;
- p->dlt_list[1] = DLT_SUNATM;
- }
- p->linktype = DLT_ATM_RFC1483;
- break;
+ if (p->dlt_list != NULL) {
+ p->dlt_list[dlt_index++] = DLT_CHDLC;
+ p->dlt_list[dlt_index++] = DLT_PPP_SERIAL;
+ p->dlt_list[dlt_index++] = DLT_FRELAY;
+ }
+ if(!p->linktype)
+ p->linktype = DLT_CHDLC;
+ break;
+
+ case TYPE_ETH:
+ case TYPE_COLOR_ETH:
+ case TYPE_DSM_COLOR_ETH:
+ case TYPE_COLOR_HASH_ETH:
+ /*
+ * This is (presumably) a real Ethernet capture; give it a
+ * link-layer-type list with DLT_EN10MB and DLT_DOCSIS, so
+ * that an application can let you choose it, in case you're
+ * capturing DOCSIS traffic that a Cisco Cable Modem
+ * Termination System is putting out onto an Ethernet (it
+ * doesn't put an Ethernet header onto the wire, it puts raw
+ * DOCSIS frames out on the wire inside the low-level
+ * Ethernet framing).
+ */
+ if (p->dlt_list != NULL) {
+ p->dlt_list[dlt_index++] = DLT_EN10MB;
+ p->dlt_list[dlt_index++] = DLT_DOCSIS;
+ }
+ if(!p->linktype)
+ p->linktype = DLT_EN10MB;
+ break;
+ case TYPE_ATM:
+ case TYPE_AAL5:
+ case TYPE_MC_ATM:
+ case TYPE_MC_AAL5:
+ if (p->dlt_list != NULL) {
+ p->dlt_list[dlt_index++] = DLT_ATM_RFC1483;
+ p->dlt_list[dlt_index++] = DLT_SUNATM;
+ }
+ if(!p->linktype)
+ p->linktype = DLT_ATM_RFC1483;
+ break;
- case TYPE_LEGACY:
- p->linktype = DLT_NULL;
- break;
+ case TYPE_COLOR_MC_HDLC_POS:
+ case TYPE_MC_HDLC:
+ if (p->dlt_list != NULL) {
+ p->dlt_list[dlt_index++] = DLT_CHDLC;
+ p->dlt_list[dlt_index++] = DLT_PPP_SERIAL;
+ p->dlt_list[dlt_index++] = DLT_FRELAY;
+ p->dlt_list[dlt_index++] = DLT_MTP2;
+ p->dlt_list[dlt_index++] = DLT_MTP2_WITH_PHDR;
+ p->dlt_list[dlt_index++] = DLT_LAPD;
+ }
+ if(!p->linktype)
+ p->linktype = DLT_CHDLC;
+ break;
- default:
- snprintf(p->errbuf, sizeof(p->errbuf), "unknown DAG linktype %d\n", daglinktype);
- return (-1);
+ case TYPE_IPV4:
+ case TYPE_IPV6:
+ if(!p->linktype)
+ p->linktype = DLT_RAW;
+ break;
+ case TYPE_LEGACY:
+ case TYPE_MC_RAW:
+ case TYPE_MC_RAW_CHANNEL:
+ case TYPE_IP_COUNTER:
+ case TYPE_TCP_FLOW_COUNTER:
+ case TYPE_INFINIBAND:
+ case TYPE_RAW_LINK:
+ case TYPE_INFINIBAND_LINK:
+ default:
+ /* Libpcap cannot deal with these types yet */
+ /* Add no 'native' DLTs, but still covered by DLT_ERF */
+ break;
+
+ } /* switch */
+ index++;
}
+ p->dlt_list[dlt_index++] = DLT_ERF;
+
+ p->dlt_count = dlt_index;
+
+ if(!p->linktype)
+ p->linktype = DLT_ERF;
+
return p->linktype;
}
+
+#ifdef DAG_ONLY
+/*
+ * This libpcap build supports only DAG cards, not regular network
+ * interfaces.
+ */
+
+/*
+ * There are no regular interfaces, just DAG interfaces.
+ */
+int
+pcap_platform_finddevs(pcap_if_t **alldevsp, char *errbuf)
+{
+ *alldevsp = NULL;
+ return (0);
+}
+
+/*
+ * Attempts to open a regular interface fail.
+ */
+pcap_t *
+pcap_create_interface(const char *device, char *errbuf)
+{
+ pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "This version of libpcap only supports DAG cards");
+ return NULL;
+}
+#endif
projects / libpcap / blobdiff