* modules/access/dvb: Partial EN 50 221 implementation. This activates

   native support for CAM modules (without using an external program).
   When used in conjunction with --programs, it also allows to descramble
   several services with one professional CAM.

modules/access/dvb/Modules.am

 SOURCES_dvb = \
 	access.c \
 	linux_dvb.c \
+	en50221.c \
 	dvb.h \
 	$(NULL)

modules/access/dvb/access.c

@@ -58,9 +58,6 @@ static void Close( vlc_object_t *p_this );
 #define DEVICE_TEXT N_("Device number to use on adapter")
 #define DEVICE_LONGTEXT ""
 
-#define CAM_TEXT N_("Use CAM")
-#define CAM_LONGTEXT ""
-
 #define FREQ_TEXT N_("Transponder/multiplex frequency")
 #define FREQ_LONGTEXT N_("In kHz for DVB-S or Hz for DVB-C/T")
 
@@ -131,7 +128,6 @@ vlc_module_begin();
                  VLC_FALSE );
     add_integer( "dvb-device", 0, NULL, DEVICE_TEXT, DEVICE_LONGTEXT,
                  VLC_TRUE );
-    add_bool( "dvb-cam", 0, NULL, CAM_TEXT, CAM_LONGTEXT, VLC_FALSE );
     add_integer( "dvb-frequency", 11954000, NULL, FREQ_TEXT, FREQ_LONGTEXT,
                  VLC_FALSE );
     add_integer( "dvb-inversion", 2, NULL, INVERSION_TEXT, INVERSION_LONGTEXT,
@@ -190,7 +186,7 @@ vlc_module_end();
 static block_t *Block( access_t * );
 static int Control( access_t *, int, va_list );
 
-#define SATELLITE_READ_ONCE 3
+#define DVB_READ_ONCE 3
 #define TS_PACKET_SIZE 188
 
 static void FilterUnset( access_t *, int i_max );
@@ -274,13 +270,7 @@ static int Open( vlc_object_t *p_this )
         FilterSet( p_access, 0x0, OTHER_TYPE );
     }
 
-    p_sys->b_cam = var_GetBool( p_access, "dvb-cam" );
-    if ( p_sys->b_cam )
-    {
-        msg_Dbg( p_access, "initing CAM..." );
-        if ( E_(CAMOpen)( p_access ) < 0 )
-            p_sys->b_cam = VLC_FALSE;
-    }
+    E_(CAMOpen)( p_access );
 
     return VLC_SUCCESS;
 }
@@ -297,8 +287,6 @@ static void Close( vlc_object_t *p_this )
 
     E_(DVRClose)( p_access );
     E_(FrontendClose)( p_access );
-
-    if ( p_sys->b_cam )
     E_(CAMClose)( p_access );
 
     free( p_sys );
@@ -310,10 +298,13 @@ static void Close( vlc_object_t *p_this )
 static block_t *Block( access_t *p_access )
 {
     access_sys_t *p_sys = p_access->p_sys;
+    block_t *p_block;
+
+    for ( ; ; )
+    {
         struct timeval timeout;
         fd_set fds;
         int i_ret;
-    block_t *p_block;
 
         /* Initialize file descriptor set */
         FD_ZERO( &fds );
@@ -324,17 +315,13 @@ static block_t *Block( access_t *p_access )
         timeout.tv_usec = 500000;
 
         /* Find if some data is available */
-    while( (i_ret = select( p_sys->i_handle + 1, &fds, NULL, NULL, &timeout )) == 0 ||
-           (i_ret < 0 && errno == EINTR) )
-    {
-        FD_ZERO( &fds );
-        FD_SET( p_sys->i_handle, &fds );
-        timeout.tv_sec = 0;
-        timeout.tv_usec = 500000;
+        i_ret = select( p_sys->i_handle + 1, &fds, NULL, NULL, &timeout );
 
-        if( p_access->b_die )
+        if ( p_access->b_die )
             return NULL;
-    }
+
+        if ( i_ret < 0 && errno == EINTR )
+            continue;
 
         if ( i_ret < 0 )
         {
@@ -342,8 +329,21 @@ static block_t *Block( access_t *p_access )
             return NULL;
         }
 
-    p_block = block_New( p_access, SATELLITE_READ_ONCE * TS_PACKET_SIZE );
-    if( ( p_block->i_buffer = read( p_sys->i_handle, p_block->p_buffer, SATELLITE_READ_ONCE * TS_PACKET_SIZE ) ) <= 0 )
+        if ( p_sys->i_ca_handle && mdate() > p_sys->i_ca_next_event )
+        {
+            E_(CAMPoll)( p_access );
+            p_sys->i_ca_next_event = mdate() + p_sys->i_ca_timeout;
+        }
+
+        if ( FD_ISSET( p_sys->i_handle, &fds ) )
+        {
+            break;
+        }
+    }
+
+    p_block = block_New( p_access, DVB_READ_ONCE * TS_PACKET_SIZE );
+    if( ( p_block->i_buffer = read( p_sys->i_handle, p_block->p_buffer,
+                                    DVB_READ_ONCE * TS_PACKET_SIZE ) ) <= 0 )
     {
         msg_Err( p_access, "read failed (%s)", strerror(errno) );
         block_Release( p_block );
@@ -376,7 +376,7 @@ static int Control( access_t *p_access, int i_query, va_list args )
         /* */
         case ACCESS_GET_MTU:
             pi_int = (int*)va_arg( args, int * );
-            *pi_int = SATELLITE_READ_ONCE * TS_PACKET_SIZE;
+            *pi_int = DVB_READ_ONCE * TS_PACKET_SIZE;
             break;
 
         case ACCESS_GET_PTS_DELAY:
@@ -405,26 +405,16 @@ static int Control( access_t *p_access, int i_query, va_list args )
             break;
 
         case ACCESS_SET_PRIVATE_ID_CA:
-            if ( p_sys->b_cam )
         {
-                int i_program;
-                uint16_t i_vpid, i_apid1, i_apid2, i_apid3;
-                uint8_t i_cad_length;
-                uint8_t *p_cad;
-
-                i_program = (int)va_arg( args, int );
-                i_vpid = (int16_t)va_arg( args, int );
-                i_apid1 = (uint16_t)va_arg( args, int );
-                i_apid2 = (uint16_t)va_arg( args, int );
-                i_apid3 = (uint16_t)va_arg( args, int );
-                i_cad_length = (uint8_t)va_arg( args, int );
-                p_cad = (uint8_t *)va_arg( args, uint8_t * );
-
-                E_(CAMSet)( p_access, i_program, i_vpid, i_apid1, i_apid2,
-                            i_apid3, i_cad_length, p_cad );
-            }
-            break;
+            uint8_t **pp_capmts;
+            int i_nb_capmts;
 
+            pp_capmts = (uint8_t **)va_arg( args, uint8_t ** );
+            i_nb_capmts = (int)va_arg( args, int );
+
+            E_(CAMSet)( p_access, pp_capmts, i_nb_capmts );
+            break;
+        }
         default:
             msg_Warn( p_access, "unimplemented query in control" );
             return VLC_EGENERIC;
@@ -509,7 +499,6 @@ static void VarInit( access_t *p_access )
     /* */
     var_Create( p_access, "dvb-adapter", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
     var_Create( p_access, "dvb-device", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
-    var_Create( p_access, "dvb-cam", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
     var_Create( p_access, "dvb-frequency", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
     var_Create( p_access, "dvb-inversion", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
     var_Create( p_access, "dvb-probe", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
@@ -575,7 +564,6 @@ static int ParseMRL( access_t *p_access )
     {
         GET_OPTION_INT("adapter")
         else GET_OPTION_INT("device")
-        else GET_OPTION_BOOL("cam")
         else GET_OPTION_INT("frequency")
         else GET_OPTION_INT("inversion")
         else GET_OPTION_BOOL("probe")

modules/access/dvb/dvb.h

@@ -30,6 +30,7 @@
 #define DMX      "/dev/dvb/adapter%d/demux%d"
 #define FRONTEND "/dev/dvb/adapter%d/frontend%d"
 #define DVR      "/dev/dvb/adapter%d/dvr%d"
+#define CA       "/dev/dvb/adapter%d/ca%d"
 
 /*****************************************************************************
  * Local structures
@@ -43,7 +44,19 @@ typedef struct
 
 typedef struct frontend_t frontend_t;
 
-#define MAX_DEMUX 24
+typedef struct
+{
+    int i_slot;
+    int i_resource_id;
+    void (* pf_handle)( access_t *, int, uint8_t *, int );
+    void (* pf_close)( access_t *, int );
+    void (* pf_manage)( access_t *, int );
+    void *p_sys;
+} en50221_session_t;
+
+#define MAX_DEMUX 48
+#define MAX_CI_SLOTS 16
+#define MAX_SESSIONS 32
 
 struct access_sys_t
 {
@@ -51,8 +64,16 @@ struct access_sys_t
     demux_handle_t p_demux_handles[MAX_DEMUX];
     frontend_t *p_frontend;
     vlc_bool_t b_budget_mode;
-    vlc_bool_t b_cam;
-    int i_cam_handle;
+
+    /* CA management */
+    int i_ca_handle;
+    int i_nb_slots;
+    vlc_bool_t pb_active_slot[MAX_CI_SLOTS];
+    vlc_bool_t pb_tc_has_data[MAX_CI_SLOTS];
+    en50221_session_t p_sessions[MAX_SESSIONS];
+    mtime_t i_ca_timeout, i_ca_next_event;
+    uint8_t **pp_capmts;
+    int i_nb_capmts;
 };
 
 #define VIDEO0_TYPE     1
@@ -77,6 +98,12 @@ int  E_(DVROpen)( access_t * );
 void E_(DVRClose)( access_t * );
 
 int  E_(CAMOpen)( access_t * );
-int  E_(CAMSet)( access_t *, uint16_t, uint16_t, uint16_t, uint16_t, uint16_t,
-		 uint16_t, uint8_t * );
+int  E_(CAMPoll)( access_t * );
+int  E_(CAMSet)( access_t *, uint8_t **, int );
 void E_(CAMClose)( access_t * );
+
+int E_(en50221_Init)( access_t * );
+int E_(en50221_Poll)( access_t * );
+int E_(en50221_SetCAPMT)( access_t *, uint8_t **, int );
+void E_(en50221_End)( access_t * );
+

modules/access/dvb/linux_dvb.c

 /*****************************************************************************
- * dvb.c : functions to control a DVB card under Linux with v4l2
+ * linux_dvb.c : functions to control a DVB card under Linux with v4l2
  *****************************************************************************
  * Copyright (C) 1998-2004 VideoLAN
  *
@@ -42,13 +42,12 @@
 #include <linux/dvb/version.h>
 #include <linux/dvb/dmx.h>
 #include <linux/dvb/frontend.h>
-
-#include <linux/errno.h>
+#include <linux/dvb/ca.h>
 
 #include "dvb.h"
-#include "network.h"
 
 #define DMX_BUFFER_SIZE (1024 * 1024)
+#define CA_MAX_STATE_RETRY 5
 
 /*
  * Frontends
@@ -1108,60 +1107,121 @@ void E_(DVRClose)( access_t * p_access )
 
 /*
  * CAM device
- *
- * This uses the external cam_set program from libdvb-0.5.4
  */
 
 /*****************************************************************************
  * CAMOpen :
  *****************************************************************************/
-int E_(CAMOpen)( access_t * p_access )
+int E_(CAMOpen)( access_t *p_access )
 {
     access_sys_t *p_sys = p_access->p_sys;
+    char ca[128];
+    int i_adapter, i_device, i_slot, i_active_slots = 0;
+    ca_caps_t caps;
+
+    i_adapter = var_GetInteger( p_access, "dvb-adapter" );
+    i_device = var_GetInteger( p_access, "dvb-device" );
+
+    if( snprintf( ca, sizeof(ca), CA, i_adapter, i_device ) >= (int)sizeof(ca) )
+    {
+        msg_Err( p_access, "snprintf() truncated string for CA" );
+        ca[sizeof(ca) - 1] = '\0';
+    }
 
-    p_sys->i_cam_handle = net_OpenTCP( p_access, "localhost", 4711 );
-    if ( p_sys->i_cam_handle < 0 )
+    msg_Dbg( p_access, "Opening device %s", ca );
+    if( (p_sys->i_ca_handle = open(ca, O_RDWR | O_NONBLOCK)) < 0 )
     {
-        return -VLC_EGENERIC;
+        msg_Err( p_access, "CAMInit: opening device failed (%s)",
+                 strerror(errno) );
+        return VLC_EGENERIC;
+    }
+
+    if ( ioctl( p_sys->i_ca_handle, CA_GET_CAP, &caps ) != 0
+          || caps.slot_num == 0 || caps.slot_type != CA_CI_LINK )
+    {
+        msg_Err( p_access, "CAMInit: no compatible CAM module" );
+        close( p_sys->i_ca_handle );
+        p_sys->i_ca_handle = 0;
+        return VLC_EGENERIC;
+    }
+
+    p_sys->i_nb_slots = caps.slot_num;
+    memset( p_sys->pb_active_slot, 0, sizeof(vlc_bool_t) * MAX_CI_SLOTS );
+
+    for ( i_slot = 0; i_slot < p_sys->i_nb_slots; i_slot++ )
+    {
+        ca_slot_info_t sinfo;
+        int i;
+
+        if ( ioctl( p_sys->i_ca_handle, CA_RESET, 1 << i_slot) != 0 )
+        {
+            msg_Err( p_access, "CAMInit: couldn't reset slot %d", i_slot );
+            continue;
+        }
+
+        for ( i = 0; i < CA_MAX_STATE_RETRY; i++ )
+        {
+            msleep(100000);
+
+            sinfo.num = i_slot;
+            if ( ioctl( p_sys->i_ca_handle, CA_GET_SLOT_INFO, &sinfo ) != 0 )
+            {
+                msg_Err( p_access, "CAMInit: couldn't get info on slot %d",
+                         i_slot );
+                continue;
+            }
+
+            if ( sinfo.flags & CA_CI_MODULE_READY )
+            {
+                p_sys->pb_active_slot[i_slot] = VLC_TRUE;
+            }
+        }
+    }
+
+    i_active_slots = E_(en50221_Init)( p_access );
+
+    msg_Dbg( p_access, "CAMInit: found a CI handler with %d slots, %d active",
+             p_sys->i_nb_slots, i_active_slots );
+
+    if ( !i_active_slots )
+    {
+        close( p_sys->i_ca_handle );
+        p_sys->i_ca_handle = 0;
+        return VLC_EGENERIC;
     }
 
     return VLC_SUCCESS;
 }
 
 /*****************************************************************************
- * CAMSet :
+ * CAMPoll :
  *****************************************************************************/
-int E_(CAMSet)( access_t * p_access, uint16_t i_program, uint16_t i_vpid,
-                uint16_t i_apid1, uint16_t i_apid2, uint16_t i_apid3,
-                uint16_t i_cad_length, uint8_t *p_cad )
+int E_(CAMPoll)( access_t * p_access )
 {
     access_sys_t *p_sys = p_access->p_sys;
-    uint8_t p_str[12];
-
-    memcpy( p_str, &i_program, 2 );
-    memcpy( p_str + 2, &i_vpid, 2 );
-    memcpy( p_str + 4, &i_apid1, 2 );
-    memcpy( p_str + 6, &i_apid2, 2 );
-    memcpy( p_str + 8, &i_apid3, 2 );
-    memcpy( p_str + 10, &i_cad_length, 2 );
 
-    if ( net_Write( p_access, p_sys->i_cam_handle, p_str, 12 ) != 12 )
+    if ( p_sys->i_ca_handle == 0 )
     {
-        msg_Err( p_access, "write 1 failed (%s)", strerror(errno) );
-        return -VLC_EGENERIC;
+        return VLC_EGENERIC;
     }
 
-    if ( i_cad_length )
-    {
-        if ( net_Write( p_access, p_sys->i_cam_handle, p_cad, i_cad_length )
-              != i_cad_length )
+    return E_(en50221_Poll)( p_access );
+}
+
+/*****************************************************************************
+ * CAMSet :
+ *****************************************************************************/
+int E_(CAMSet)( access_t * p_access, uint8_t **pp_capmts, int i_nb_capmts )
+{
+    access_sys_t *p_sys = p_access->p_sys;
+
+    if ( p_sys->i_ca_handle == 0 )
     {
-            msg_Err( p_access, "write 2 failed (%s) %d", strerror(errno),
-                     i_cad_length );
-            return -VLC_EGENERIC;
-        }
+        return VLC_EGENERIC;
     }
 
+    E_(en50221_SetCAPMT)( p_access, pp_capmts, i_nb_capmts );
+
     return VLC_SUCCESS;
 }
 
@@ -1172,9 +1232,11 @@ void E_(CAMClose)( access_t * p_access )
 {
     access_sys_t *p_sys = p_access->p_sys;
 
-    if ( p_sys->i_cam_handle )
+    E_(en50221_End)( p_access );
+
+    if ( p_sys->i_ca_handle )
     {
-        close( p_sys->i_cam_handle );
+        close( p_sys->i_ca_handle );
     }
 }