1 files changed, 354 insertions, 0 deletions

diff --git a/lib/libpcap/libpcap/pcap-septel.c b/lib/libpcap/libpcap/pcap-septel.c
new file mode 100644
index 0000000..24cb47b
--- /dev/null
+++ b/lib/libpcap/libpcap/pcap-septel.c
@@ -0,0 +1,354 @@
+/*
+ * pcap-septel.c: Packet capture interface for Intel/Septel card.
+ *
+ * Authors: Gilbert HOYEK (gil_hoyek@hotmail.com), Elias M. KHOURY
+ * (+961 3 485243)
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <sys/param.h>
+
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include "pcap-int.h"
+
+#include <ctype.h>
+#include <netinet/in.h>
+#include <sys/mman.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <msg.h>
+#include <ss7_inc.h>
+#include <sysgct.h>
+#include <pack.h>
+#include <system.h>
+
+#include "pcap-septel.h"
+
+static int septel_setfilter(pcap_t *p, struct bpf_program *fp);
+static int septel_stats(pcap_t *p, struct pcap_stat *ps);
+static int septel_getnonblock(pcap_t *p);
+static int septel_setnonblock(pcap_t *p, int nonblock);
+
+/*
+ * Private data for capturing on Septel devices.
+ */
+struct pcap_septel {
+	struct pcap_stat stat;
+}
+
+/*
+ *  Read at most max_packets from the capture queue and call the callback
+ *  for each of them. Returns the number of packets handled, -1 if an
+ *  error occured, or -2 if we were told to break out of the loop.
+ */
+static int septel_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user) {
+
+  struct pcap_septel *ps = p->priv;
+  HDR *h;
+  MSG *m;
+  int processed = 0 ;
+  int t = 0 ;
+
+  /* identifier for the message queue of the module(upe) from which we are capturing
+   * packets.These IDs are defined in system.txt . By default it is set to 0x2d
+   * so change it to 0xdd for technical reason and therefore the module id for upe becomes:
+   * LOCAL        0xdd           * upe - Example user part task */
+  unsigned int id = 0xdd;
+
+  /* process the packets */
+  do  {
+
+    unsigned short packet_len = 0;
+    int caplen = 0;
+    int counter = 0;
+    struct pcap_pkthdr   pcap_header;
+    u_char *dp ;
+
+    /*
+     * Has "pcap_breakloop()" been called?
+     */
+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;
+    }
+
+    /*repeat until a packet is read
+     *a NULL message means :
+     * when no packet is in queue or all packets in queue already read */
+    do  {
+      /* receive packet in non-blocking mode
+       * GCT_grab is defined in the septel library software */
+      h = GCT_grab(id);
+
+      m = (MSG*)h;
+      /* a couter is added here to avoid an infinite loop
+       * that will cause our capture program GUI to freeze while waiting
+       * for a packet*/
+      counter++ ;
+
+    }
+    while  ((m == NULL)&& (counter< 100)) ;
+
+    if (m != NULL) {
+
+      t = h->type ;
+
+      /* catch only messages with type = 0xcf00 or 0x8f01 corrsponding to ss7 messages*/
+      /* XXX = why not use API_MSG_TX_REQ for 0xcf00 and API_MSG_RX_IND
+       * for 0x8f01? */
+      if ((t != 0xcf00) && (t != 0x8f01)) {
+        relm(h);
+        goto loop ;
+      }
+
+      /* XXX - is API_MSG_RX_IND for an MTP2 or MTP3 message? */
+      dp = get_param(m);/* get pointer to MSG parameter area (m->param) */
+      packet_len = m->len;
+      caplen =  p->snapshot ;
+
+
+      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)) {
+
+
+        /*  get a time stamp , consisting of :
+         *
+         *  pcap_header.ts.tv_sec:
+         *  ----------------------
+         *   a UNIX format time-in-seconds when he packet was captured,
+         *   i.e. the number of seconds since Epoch time (January 1,1970, 00:00:00 GMT)
+         *
+         *  pcap_header.ts.tv_usec :
+         *  ------------------------
+         *   the number of microseconds since that second
+         *   when the packet was captured
+         */
+
+        (void)gettimeofday(&pcap_header.ts, NULL);
+
+        /* Fill in our own header data */
+        pcap_header.caplen = caplen;
+        pcap_header.len = packet_len;
+
+        /* Count the packet. */
+        ps->stat.ps_recv++;
+
+        /* Call the user supplied callback function */
+        callback(user, &pcap_header, dp);
+
+        processed++ ;
+
+      }
+      /* after being processed the packet must be
+       *released in order to receive another one */
+      relm(h);
+    }else
+      processed++;
+
+  }
+  while (processed < cnt) ;
+
+  return processed ;
+}
+
+
+static int
+septel_inject(pcap_t *handle, const void *buf _U_, size_t size _U_)
+{
+  pcap_strlcpy(handle->errbuf, "Sending packets isn't supported on Septel cards",
+          PCAP_ERRBUF_SIZE);
+  return (-1);
+}
+
+/*
+ *  Activate a handle for a live capture from the given Septel device.  Always pass a NULL device
+ *  The promisc flag is ignored because Septel cards have built-in tracing.
+ *  The timeout is also ignored as it is not supported in hardware.
+ *
+ *  See also pcap(3).
+ */
+static pcap_t *septel_activate(pcap_t* handle) {
+  /* Initialize some components of the pcap structure. */
+  handle->linktype = DLT_MTP2;
+
+  /*
+   * Turn a negative snapshot value (invalid), a snapshot value of
+   * 0 (unspecified), or a value bigger than the normal maximum
+   * value, into the maximum allowed value.
+   *
+   * If some application really *needs* a bigger snapshot
+   * length, we should just increase MAXIMUM_SNAPLEN.
+   */
+  if (handle->snapshot <= 0 || handle->snapshot > MAXIMUM_SNAPLEN)
+    handle->snapshot = MAXIMUM_SNAPLEN;
+
+  handle->bufsize = 0;
+
+  /*
+   * "select()" and "poll()" don't work on Septel queues
+   */
+  handle->selectable_fd = -1;
+
+  handle->read_op = septel_read;
+  handle->inject_op = septel_inject;
+  handle->setfilter_op = septel_setfilter;
+  handle->set_datalink_op = NULL; /* can't change data link type */
+  handle->getnonblock_op = septel_getnonblock;
+  handle->setnonblock_op = septel_setnonblock;
+  handle->stats_op = septel_stats;
+
+  return 0;
+}
+
+pcap_t *septel_create(const char *device, char *ebuf, int *is_ours) {
+	const char *cp;
+	pcap_t *p;
+
+	/* Does this look like the Septel device? */
+	cp = strrchr(device, '/');
+	if (cp == NULL)
+		cp = device;
+	if (strcmp(cp, "septel") != 0) {
+		/* Nope, it's not "septel" */
+		*is_ours = 0;
+		return NULL;
+	}
+
+	/* OK, it's probably ours. */
+	*is_ours = 1;
+
+	p = pcap_create_common(ebuf, sizeof (struct pcap_septel));
+	if (p == NULL)
+		return NULL;
+
+	p->activate_op = septel_activate;
+	/*
+	 * Set these up front, so that, even if our client tries
+	 * to set non-blocking mode before we're activated, or
+	 * query the state of non-blocking mode, they get an error,
+	 * rather than having the non-blocking mode option set
+	 * for use later.
+	 */
+	p->getnonblock_op = septel_getnonblock;
+	p->setnonblock_op = septel_setnonblock;
+	return p;
+}
+
+static int septel_stats(pcap_t *p, struct pcap_stat *ps) {
+  struct pcap_septel *handlep = p->priv;
+  /*handlep->stat.ps_recv = 0;*/
+  /*handlep->stat.ps_drop = 0;*/
+
+  *ps = handlep->stat;
+
+  return 0;
+}
+
+
+int
+septel_findalldevs(pcap_if_list_t *devlistp, char *errbuf)
+{
+  /*
+   * XXX - do the notions of "up", "running", or "connected" apply here?
+   */
+  if (add_dev(devlistp,"septel",0,"Intel/Septel device",errbuf) == NULL)
+    return -1;
+  return 0;
+}
+
+
+/*
+ * Installs the given bpf filter program in the given pcap structure.  There is
+ * no attempt to store the filter in kernel memory as that is not supported
+ * with Septel cards.
+ */
+static int septel_setfilter(pcap_t *p, struct bpf_program *fp) {
+  if (!p)
+    return -1;
+  if (!fp) {
+    strncpy(p->errbuf, "setfilter: No filter specified",
+	    sizeof(p->errbuf));
+    return -1;
+  }
+
+  /* Make our private copy of the filter */
+
+  if (install_bpf_program(p, fp) < 0)
+    return -1;
+
+  return (0);
+}
+
+/*
+ * We don't support non-blocking mode.  I'm not sure what we'd
+ * do to support it and, given that we don't support select()/
+ * poll()/epoll_wait()/kevent() etc., it probably doesn't
+ * matter.
+ */
+static int
+septel_getnonblock(pcap_t *p)
+{
+  fprintf(p->errbuf, PCAP_ERRBUF_SIZE, "Non-blocking mode not supported on Septel devices");
+  return (-1);
+}
+
+static int
+septel_setnonblock(pcap_t *p, int nonblock _U_)
+{
+  fprintf(p->errbuf, PCAP_ERRBUF_SIZE, "Non-blocking mode not supported on Septel devices");
+  return (-1);
+}
+
+#ifdef SEPTEL_ONLY
+/*
+ * This libpcap build supports only Septel cards, not regular network
+ * interfaces.
+ */
+
+/*
+ * There are no regular interfaces, just Septel interfaces.
+ */
+int
+pcap_platform_finddevs(pcap_if_list_t *devlistp, char *errbuf)
+{
+  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 Septel cards");
+  return (NULL);
+}
+
+/*
+ * Libpcap version string.
+ */
+const char *
+pcap_lib_version(void)
+{
+  return (PCAP_VERSION_STRING " (Septel-only)");
+}
+#endif