* New -Z option to build an MRTG file of the TS stream.

Makefile

@@ -10,7 +10,7 @@ CFLAGS += -I/usr/src/kernel/linux-2.6.29.1/include
 LDLIBS += -lrt
 LDLIBS_DVBLAST += -lpthread
 
-OBJ_DVBLAST = dvblast.o util.o dvb.o udp.o asi.o demux.o output.o en50221.o comm.o
+OBJ_DVBLAST = dvblast.o util.o dvb.o udp.o asi.o demux.o output.o en50221.o comm.o mrtg-cnt.o
 OBJ_DVBLASTCTL = util.o dvblastctl.o
 
 PREFIX ?= /usr/local

NEWS

@@ -15,6 +15,8 @@ Changes between 1.2 and 2.0:
   * Output all PMTs with -w, all ESs (even unknown) for a program with -z
   * Add support for ECM and EMM packets pass-through
   * Fix diseqc command with high-band tranponders
+  * Add basic support for ATSC
+  * Add support for MRTG statistics
 
 Changes between 1.1 and 1.2:
 ----------------------------

dvblast.c

@@ -49,6 +49,8 @@
 #include <bitstream/dvb/si.h>
 #include <bitstream/ietf/rtp.h>
 
+#include "mrtg-cnt.h"
+
 /*****************************************************************************
  * Local declarations
  *****************************************************************************/
@@ -107,6 +109,9 @@ static mtime_t i_latency_global = DEFAULT_OUTPUT_LATENCY;
 static mtime_t i_retention_global = DEFAULT_MAX_RETENTION;
 static int i_ttl_global = 64;
 
+/* TPS Input log filename */
+char * psz_mrtg_file = NULL;
+
 void (*pf_Open)( void ) = NULL;
 block_t * (*pf_Read)( mtime_t i_poll_timeout ) = NULL;
 void (*pf_Reset)( void ) = NULL;
@@ -461,6 +466,7 @@ void usage()
     msg_Raw( NULL, "  -Q --quit-timeout     when locked, quit after this delay (in ms), or after the first lock timeout" );
     msg_Raw( NULL, "  -r --remote-socket <remote socket>" );
     msg_Raw( NULL, "  -V --version          only display the version" );
+    msg_Raw( NULL, "  -Z --mrtg-file <file>   Log input packets and errors into mrtg-file" );
     exit(1);
 }
 
@@ -531,10 +537,11 @@ int main( int i_argc, char **pp_argv )
         { "quiet",           no_argument,       NULL, 'q' },
         { "help",            no_argument,       NULL, 'h' },
         { "version",         no_argument,       NULL, 'V' },
+        { "mrtg-file",       required_argument, NULL, 'Z' },
         { 0, 0, 0, 0 }
     };
 
-    while ( (c = getopt_long(i_argc, pp_argv, "q::c:r:t:o:i:a:n:f:F:R:s:S:v:pb:I:m:P:K:G:H:X:O:uwUTL:E:d:D:A:lzCWYeM:N:j:J:x:Q:hV", long_options, NULL)) != -1 )
+    while ( (c = getopt_long(i_argc, pp_argv, "q::c:r:t:o:i:a:n:f:F:R:s:S:v:pb:I:m:P:K:G:H:X:O:uwUTL:E:d:D:A:lzCWYeM:N:j:J:x:Q:hVZ:", long_options, NULL)) != -1 )
     {
         switch ( c )
         {
@@ -789,6 +796,10 @@ int main( int i_argc, char **pp_argv )
             exit(0);
             break;
 
+        case 'Z':
+            psz_mrtg_file = optarg;
+            break;
+
         case 'h':
         default:
             usage();
@@ -804,7 +815,8 @@ int main( int i_argc, char **pp_argv )
         DisplayVersion();
 
     msg_Warn( NULL, "restarting" );
-    switch (i_print_type) {
+    switch (i_print_type) 
+    {
         case PRINT_XML:
             printf("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
             printf("<TS>\n");
@@ -894,6 +906,9 @@ int main( int i_argc, char **pp_argv )
 
     demux_Open();
  
+    // init the mrtg logfile
+    mrtgInit(psz_mrtg_file);
+
     if ( i_priority > 0 )
     {
         memset( &param, 0, sizeof(struct sched_param) );
@@ -924,7 +939,8 @@ int main( int i_argc, char **pp_argv )
 
         if ( i_quit_timeout && i_quit_timeout <= i_wallclock )
         {
-            switch (i_print_type) {
+            switch (i_print_type) 
+            {
             case PRINT_XML:
                 printf("</TS>\n");
                 break;
@@ -936,12 +952,16 @@ int main( int i_argc, char **pp_argv )
 
         p_ts = pf_Read( i_poll_timeout );
         if ( p_ts != NULL ) 
+        {
+	    mrtgAnalyse(p_ts);
             demux_Run( p_ts );
+        }
         i_poll_timeout = output_Send();
         if ( i_poll_timeout == -1 || i_poll_timeout > MAX_POLL_TIMEOUT )
             i_poll_timeout = MAX_POLL_TIMEOUT;
     }
 
+    mrtgClose();
     if ( b_enable_syslog )
         msg_Disconnect();
     return EXIT_SUCCESS;

mrtg-cnt.c

+/*****************************************************************************
+ * mrtg-cnt.c Handle dvb TS packets and count them for MRTG
+ *****************************************************************************
+ * Copyright Tripleplay service 2004,2005,2011
+ *
+ * Author:  Andy Lindsay <a.lindsay@tripleplay-services.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+/*  vim: set shiftwidth=4 tabstop=4 expandtab autoindent : */
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <sys/types.h>
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/time.h>
+
+#include "dvblast.h"
+
+// File handle
+static FILE *mrtg_fh = NULL;
+
+// Counts
+static long long l_mrtg_packets = 0;            // Packets received
+static long long l_mrtg_seq_err_packets = 0;    // Out of sequence packets received
+static long long l_mrtg_error_packets = 0;      // Packets received with the error flag set
+static long long l_mrtg_scram_packets = 0;      // Scrambled Packets received
+
+// Reporting timer
+#if defined( WIN32 )
+static LARGE_INTEGER mrtg_time;
+static LARGE_INTEGER mrtg_inc;
+#else
+static struct timeval mrtg_time = { 0, 0 };
+#endif
+
+// Define the dump period in seconds
+#define MRTG_INTERVAL   10
+
+// Pid sequence numbers
+#define PIDS    0x2000
+static signed char i_pid_seq[PIDS];
+
+// Report the mrtg counters: bytes received, error packets & sequence errors
+static void dumpCounts()
+{
+    unsigned int multiplier = 1;        //MRTG_INTERVAL;
+    if(mrtg_fh) {
+        rewind(mrtg_fh);
+        fprintf(mrtg_fh, "%lld %lld %lld %lld\n",
+                l_mrtg_packets * 188 * multiplier,
+                l_mrtg_error_packets * multiplier,
+                l_mrtg_seq_err_packets * multiplier,
+                l_mrtg_scram_packets * multiplier);
+        fflush(mrtg_fh);
+    }
+}
+
+// analyse the input block counting packets and errors
+// The input is a pointer to a block_t structure, which might be a linked list
+// of blocks. Each block has one TS packet.
+int mrtgAnalyse(block_t * p_ts)
+{
+    unsigned int i_pid;
+    block_t *p_block = p_ts;
+    
+    while (p_block != NULL) {
+        uint8_t *ts_packet = p_block->p_ts;
+
+        char i_seq, i_last_seq;
+        l_mrtg_packets++;
+
+        if (ts_packet[0] != 0x47) {
+            l_mrtg_error_packets++;
+            p_block = p_block->p_next;
+            continue;
+        }
+
+        if (ts_packet[1] & 0x80) {
+            l_mrtg_error_packets++;
+            p_block = p_block->p_next;
+            continue;
+        }
+
+        i_pid = (ts_packet[1] & 0x1f) << 8 | ts_packet[2];
+
+        // Just count null packets - don't check the sequence numbering
+        if (i_pid == 0x1fff) {
+            p_block = p_block->p_next;
+            continue;
+        }
+
+        if (ts_packet[3] & 0xc0) {
+            l_mrtg_scram_packets++;
+        }
+        // Check the sequence numbering
+        i_seq = ts_packet[3] & 0xf;
+        i_last_seq = i_pid_seq[i_pid];
+
+        if (i_last_seq == -1) {
+            // First packet - ignore the sequence
+        } else if (ts_packet[3] & 0x10) {
+            // Packet contains payload - sequence should be up by one
+            if (i_seq != ((i_last_seq + 1) & 0x0f)) {
+                l_mrtg_seq_err_packets++;
+            }
+        } else {
+            // Packet contains no payload - sequence should be unchanged
+            if (i_seq != i_last_seq) {
+                l_mrtg_seq_err_packets++;
+            }
+        }
+        i_pid_seq[i_pid] = i_seq;
+
+        // Look at next block
+        p_block = p_block->p_next;
+    }
+
+    // All blocks processed. See if we need to dump the stats
+    struct timeval now;
+    gettimeofday(&now, NULL);
+    if (timercmp(&now, &mrtg_time, >)) {
+        // Time to report the mrtg counters
+        dumpCounts();
+
+        // Set the timer for next time
+        //
+        // Normally we add the interval to the previous time so that if one
+        // dump is a bit late, the next one still occurs at the correct time.
+        // However, if there is a long gap (e.g. because the channel has
+        // stopped for some time), then just rebase the timing to the current
+        // time.  I've chosen MRTG_INTERVAL as the long gap - this is arbitary
+        if ((now.tv_sec - mrtg_time.tv_sec) > MRTG_INTERVAL) {
+            msg_Dbg(NULL, "Dump is %d seconds late - reset timing\n",
+                    (int) (now.tv_sec - mrtg_time.tv_sec));
+            mrtg_time = now;
+        }
+        mrtg_time.tv_sec += MRTG_INTERVAL;
+    }
+
+    return 0;
+}
+
+int mrtgInit(char *mrtg_file)
+{
+
+    /* Open MRTG file */
+    msg_Dbg(NULL, "Opening mrtg file %s.\n", mrtg_file);
+    if ((mrtg_fh = fopen(mrtg_file, "wb")) == NULL) {
+        msg_Err(NULL, "unable to open mrtg file");
+        return -1;
+    }
+    // Initialise the file
+    fprintf(mrtg_fh, "0 0 0 0\n");
+    fflush(mrtg_fh);
+
+    // Initialise the sequence numbering
+    memset(&i_pid_seq[0], -1, sizeof(signed char) * PIDS);
+
+    // Set the reporting timer
+    gettimeofday(&mrtg_time, NULL);
+    mrtg_time.tv_sec += MRTG_INTERVAL;
+
+    return 0;
+}
+
+void mrtgClose()
+{
+    // This is only for testing when using filetest.
+    if (mrtg_fh) {
+        dumpCounts();
+        fclose(mrtg_fh);
+        mrtg_fh = NULL;
+    }
+}

mrtg-cnt.h

+/*****************************************************************************
+ * mrtg-cnt.h
+ *****************************************************************************
+ * Copyright Tripleplay service 2004,2005,2011
+ *
+ * Author:  Andy Lindsay <a.lindsay@tripleplay-services.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+/*  vim: set shiftwidth=4 tabstop=4 expandtab autoindent : */
+
+#ifndef MRTG_CNT_H
+#define MRTG_CNT_H
+
+int mrtgInit(char *mrtg_file);
+void mrtgClose();
+int mrtgAnalyse(block_t * p_ts);
+
+#endif