Added detection of tone_zone_sound structure name. Thanx to Janis for this
[lcr.git] / bchannel.c
index dbc11d7..5793795 100644 (file)
@@ -9,9 +9,6 @@
 **                                                                           **
 \*****************************************************************************/ 
 
-
-
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
-#ifdef SOCKET_MISDN
 #include <netinet/udp.h>
 #include <netinet/in.h>
 #include <netdb.h>
 #include <sys/socket.h>
-#include <pthread.h>
-#else
-#include "mISDNlib.h"
-#include <linux/mISDNif.h>
+#include <mISDN/mISDNif.h>
+
+#include <mISDN/mISDNcompat.h>
+int __af_isdn = MISDN_AF_ISDN;
+#include <mISDN/q931.h>
+
+#define HAVE_ATTRIBUTE_always_inline 1
+#define HAVE_ARPA_INET_H 1
+#define HAVE_TIMERSUB 1
+
+#include <asterisk/compiler.h>
+#include <asterisk/frame.h>
+
+/* Choose if you want to have chan_lcr for Asterisk 1.4.x or CallWeaver 1.2.x */
+/* #define LCR_FOR_CALLWEAVER */
+
+#ifdef LCR_FOR_CALLWEAVER
+#include <asterisk/phone_no_utils.h>
+#include <asterisk/logger.h>
+#include <asterisk/module.h>
+#include <asterisk/channel.h>
 #endif
+
+#include "extension.h"
+#include "message.h"
+#include "lcrsocket.h"
+#include "cause.h"
+#include "select.h"
 #include "bchannel.h"
+#include "chan_lcr.h"
+#include "callerid.h"
+#include "options.h"
+
 
 #ifndef ISDN_PID_L4_B_USER
 #define ISDN_PID_L4_B_USER 0x440000ff
 #endif
 
-#define PERROR(arg...) fprintf(stderr, ##arg)
-#define PDEBUG(arg...) while(0)
-
 pid_t  bchannel_pid;
 
 enum {
        BSTATE_IDLE,
        BSTATE_ACTIVATING,
        BSTATE_ACTIVE,
+       BSTATE_DEACTIVATING,
 };
 
-#ifdef SOCKET_MISDN
-int bchannel_socket = -1;
-
-int bchannel_initialize(void)
-{
-       /* try to open raw socket to check kernel */
-       bchannel_socket = socket(PF_ISDN, SOCK_RAW, ISDN_P_BASE);
-       if (bchannel_socket < 0)
-       {
-               PERROR("Cannot open mISDN due to %s. (Does your Kernel support socket based mISDN?)\n", strerror(errno));
-               return(-1);
-       }
-
-       mISDN_debug_init(global_debug, NULL, NULL, NULL);
-
-       bchannel_pid = get_pid();
-
-       /* init mlayer3 */
-       init_layer3(4); // buffer of 4
-
-       return(0);
-}
-
-void bchannel_deinitialize(void)
-{
-       cleanup_layer3();
-
-       mISDN_debug_close();
-
-       if (bchannel_socket > -1)
-               close(bchannel_socket);
-}
-#else
-int bchannel_entity = 0; /* used for udevice */
-int bchannel_device = -1; /* the device handler and port list */
+static void bchannel_send_queue(struct bchannel *bchannel);
 
 int bchannel_initialize(void)
 {
-       char debug_log[128];
-       unsigned char buff[1025];
-       iframe_t *frm = (iframe_t *)buff;
-       int ret;
-
-       /* open mISDNdevice if not already open */
-       if (bchannel_device < 0)
-       {
-               ret = mISDN_open();
-               if (ret < 0)
-               {
-                       PERROR("cannot open mISDN device ret=%d errno=%d (%s) Check for mISDN modules!\nAlso did you create \"/dev/mISDN\"? Do: \"mknod /dev/mISDN c 46 0\"\n", ret, errno, strerror(errno));
-                       return(-1);
-               }
-               bchannel_device = ret;
-               PDEBUG("mISDN device opened.\n");
-
-               /* create entity for layer 3 TE-mode */
-               mISDN_write_frame(bchannel_device, buff, 0, MGR_NEWENTITY | REQUEST, 0, 0, NULL, TIMEOUT_1SEC);
-               ret = mISDN_read_frame(bchannel_device, frm, sizeof(iframe_t), 0, MGR_NEWENTITY | CONFIRM, TIMEOUT_1SEC);
-               if (ret < (int)mISDN_HEADER_LEN)
-               {
-                       noentity:
-                       PERROR("Cannot request MGR_NEWENTITY from mISDN. Exitting due to software bug.");
-                       return(-1);
-               }
-               bchannel_entity = frm->dinfo & 0xffff;
-               if (!bchannel_entity)
-                       goto noentity;
-       }
-       return(0);
+       return 0;
 }
 
 void bchannel_deinitialize(void)
 {
-       unsigned char buff[1025];
-
-       if (bchannel_device >= 0)
-       {
-               /* free entity */
-               mISDN_write_frame(bchannel_device, buff, 0, MGR_DELENTITY | REQUEST, bchannel_entity, 0, NULL, TIMEOUT_1SEC);
-               /* close device */
-               mISDN_close(bchannel_device);
-               bchannel_device = -1;
-       }
 }
-#endif
 
 /*
  * send control information to the channel (dsp-module)
  */
-static void ph_control(unsigned long handle, unsigned long c1, unsigned long c2, char *trace_name, int trace_value)
+static void ph_control(int sock, unsigned int c1, unsigned int c2, char *trace_name, int trace_value, int b_mode)
 {
-#ifdef SOCKET_MISDN
        unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+sizeof(int)];
        struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
-       unsigned long *d = buffer+MISDN_HEADER_LEN;
+       unsigned int *d = (unsigned int *)(buffer+MISDN_HEADER_LEN);
        int ret;
 
+       if (b_mode != 0 && b_mode != 2)
+               return;
+
+       CDEBUG(NULL, NULL, "Sending PH_CONTROL %s %x,%x\n", trace_name, c1, c2);
        ctrl->prim = PH_CONTROL_REQ;
        ctrl->id = 0;
        *d++ = c1;
        *d++ = c2;
-       ret = sendto(handle, buffer, MISDN_HEADER_LEN+sizeof(int)*2, 0, NULL, 0);
-       if (!ret)
-               PERROR("Failed to send to socket %d\n", handle);
-#else
-       unsigned char buffer[mISDN_HEADER_LEN+sizeof(int)+sizeof(int)];
-       iframe_t *ctrl = (iframe_t *)buffer; 
-       unsigned long *d = (unsigned long *)&ctrl->data.p;
-
-       ctrl->prim = PH_CONTROL | REQUEST;
-       ctrl->addr = handle | FLG_MSG_DOWN;
-       ctrl->dinfo = 0;
-       ctrl->len = sizeof(int)*2;
-       *d++ = c1;
-       *d++ = c2;
-       mISDN_write(bchannel_device, ctrl, mISDN_HEADER_LEN+ctrl->len, TIMEOUT_1SEC);
-#endif
-#if 0
-       chan_trace_header(mISDNport, isdnport, "BCHANNEL control", DIRECTION_OUT);
-       if (c1 == CMX_CONF_JOIN)
-               add_trace(trace_name, NULL, "0x%08x", trace_value);
-       else
-               add_trace(trace_name, NULL, "%d", trace_value);
-       end_trace();
-#endif
+       ret = sendto(sock, buffer, MISDN_HEADER_LEN+sizeof(int)*2, 0, NULL, 0);
+       if (ret < 0)
+               CERROR(NULL, NULL, "Failed to send to socket %d\n", sock);
 }
 
-static void ph_control_block(unsigned long handle, unsigned long c1, void *c2, int c2_len, char *trace_name, int trace_value)
+static void ph_control_block(int sock, unsigned int c1, void *c2, int c2_len, char *trace_name, int trace_value, int b_mode)
 {
-#ifdef SOCKET_MISDN
        unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+c2_len];
        struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
-       unsigned long *d = buffer+MISDN_HEADER_LEN;
+       unsigned int *d = (unsigned int *)(buffer+MISDN_HEADER_LEN);
        int ret;
 
+       if (b_mode != 0 && b_mode != 2)
+               return;
+
+       CDEBUG(NULL, NULL, "Sending PH_CONTROL (block) %s %x\n", trace_name, c1);
        ctrl->prim = PH_CONTROL_REQ;
        ctrl->id = 0;
        *d++ = c1;
        memcpy(d, c2, c2_len);
-       ret = sendto(handle, buffer, MISDN_HEADER_LEN+sizeof(int)+c2_len, 0, NULL, 0);
-       if (!ret)
-               PERROR("Failed to send to socket %d\n", handle);
-#else
-       unsigned char buffer[mISDN_HEADER_LEN+sizeof(int)+c2_len];
-       iframe_t *ctrl = (iframe_t *)buffer;
-       unsigned long *d = (unsigned long *)&ctrl->data.p;
-
-       ctrl->prim = PH_CONTROL | REQUEST;
-       ctrl->addr = handle | FLG_MSG_DOWN;
-       ctrl->dinfo = 0;
-       ctrl->len = sizeof(int)+c2_len;
-       *d++ = c1;
-       memcpy(d, c2, c2_len);
-       mISDN_write(bchannel_device, ctrl, mISDN_HEADER_LEN+ctrl->len, TIMEOUT_1SEC);
-#endif
-#if 0
-       chan_trace_header(mISDNport, isdnport, "BCHANNEL control", DIRECTION_OUT);
-       add_trace(trace_name, NULL, "%d", trace_value);
-       end_trace();
-#endif
+       ret = sendto(sock, buffer, MISDN_HEADER_LEN+sizeof(int)+c2_len, 0, NULL, 0);
+       if (ret < 0)
+               CERROR(NULL, NULL, "Failed to send to socket %d\n", sock);
 }
 
+static int bchannel_handle(struct lcr_fd *fd, unsigned int what, void *instance, int index);
 
 /*
  * create stack
  */
-int bchannel_create(struct bchannel *channel)
+int bchannel_create(struct bchannel *bchannel, int mode, int queue)
 {
-       unsigned char buff[1024];
        int ret;
-#ifdef SOCKET_MISDN
-       unsigned long on = 1;
-       struct sockadd_mISDN addr;
-
-       if (channel->b_sock)
-       {
-               PERROR("Error: Socket already created for handle 0x%x\n", channel->handle);
-               return(0);
+       struct sockaddr_mISDN addr;
+
+       if (bchannel->b_sock > -1) {
+               CERROR(bchannel->call, NULL, "Socket already created for handle 0x%x\n", bchannel->handle);
+               return 0;
        }
 
        /* open socket */
-       channel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_L2DSP);
-       if (channel->b_sock < 0)
-       {
-               PERROR("Error: Failed to open bchannel-socket for handle 0x%x with mISDN-DSP layer. Did you load mISDNdsp.ko?\n", channel->handle);
-               return(0);
+       bchannel->b_mode = (mode & 3);
+       switch(bchannel->b_mode) {
+               case 0:
+               CDEBUG(bchannel->call, NULL, "Open DSP audio\n");
+               bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_L2DSP);
+               break;
+               case 1:
+               CDEBUG(bchannel->call, NULL, "Open audio\n");
+               bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_RAW);
+               break;
+               case 2:
+               CDEBUG(bchannel->call, NULL, "Open DSP HDLC\n");
+               bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_L2DSPHDLC);
+               break;
+               case 3:
+               CDEBUG(bchannel->call, NULL, "Open HDLC\n");
+               bchannel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_HDLC);
+               break;
        }
-       
-       /* set nonblocking io */
-       ret = ioctl(channel->b_sock, FIONBIO, &on);
-       if (ret < 0)
-       {
-               PERROR("Error: Failed to set bchannel-socket handle 0x%x into nonblocking IO\n", channel->handle);
-               close(channel->b_sock);
-               channel->b_sock = -1;
-               return(0);
+       if (bchannel->b_sock < 0) {
+               CERROR(bchannel->call, NULL, "Failed to open bchannel-socket for handle 0x%x with mISDN-DSP layer. Did you load mISDN_dsp.ko?\n", bchannel->handle);
+               return 0;
        }
 
+       /* register fd */
+       memset(&bchannel->lcr_fd, 0, sizeof(bchannel->lcr_fd));
+       bchannel->lcr_fd.fd = bchannel->b_sock;
+       register_fd(&bchannel->lcr_fd, LCR_FD_READ | LCR_FD_EXCEPT, bchannel_handle, bchannel, 0);
+
        /* bind socket to bchannel */
        addr.family = AF_ISDN;
-       addr.dev = (channel->handle>>8)-1;
-       addr.channel = channel->handle && 0xff;
-       ret = bind(channel->b_sock, (struct sockaddr *)&addr, sizeof(addr));
-       if (ret < 0)
-       {
-               PERROR("Error: Failed to bind bchannel-socket for handle 0x%x with mISDN-DSP layer. Did you load mISDNdsp.ko?\n", channel->handle);
-               close(channel->b_sock);
-               channel->b_sock = -1;
-               return(0);
-       }
-
-#if 0
-       chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL create socket", DIRECTION_OUT);
-       add_trace("channel", NULL, "%d", i+1+(i>=15));
-       add_trace("socket", NULL, "%d", mISDNport->b_socket[i]);
-       end_trace();
-#endif
-#else
-       layer_info_t li;
-       mISDN_pid_t pid;
-
-       if (channel->b_stid)
-       {
-               PERROR("Error: stack already created for address 0x%x\n", channel->b_stid);
-               return(0);
-       }
-
-       if (channel->b_addr)
-       {
-               PERROR("Error: stack already created for address 0x%x\n", channel->b_addr);
-               return(0);
-       }
-
-       /* create new layer */
-       PDEBUG("creating new layer for stid 0x%x.\n" , channel->handle);
-       memset(&li, 0, sizeof(li));
-       memset(&pid, 0, sizeof(pid));
-       li.object_id = -1;
-       li.extentions = 0;
-       li.st = channel->handle;
-       strcpy(li.name, "B L4");
-       li.pid.layermask = ISDN_LAYER((4));
-       li.pid.protocol[4] = ISDN_PID_L4_B_USER;
-       ret = mISDN_new_layer(bchannel_device, &li);
-       if (ret)
-       {
-               failed_new_layer:
-               PERROR("mISDN_new_layer() failed to add bchannel for stid 0x%x.\n", channel->handle);
-               goto failed;
-       }
-       if (!li.id)
-       {
-               goto failed_new_layer;
-       }
-       channel->b_stid = channel->handle;
-       channel->b_addr = li.id;
-       PDEBUG("new layer (b_addr=0x%x)\n", channel->b_addr);
-
-       /* create new stack */
-       pid.protocol[1] = ISDN_PID_L1_B_64TRANS;
-       pid.protocol[2] = ISDN_PID_L2_B_TRANS;
-       pid.protocol[3] = ISDN_PID_L3_B_DSP;
-       pid.protocol[4] = ISDN_PID_L4_B_USER;
-       pid.layermask = ISDN_LAYER((1)) | ISDN_LAYER((2)) | ISDN_LAYER((3)) | ISDN_LAYER((4));
-       ret = mISDN_set_stack(bchannel_device, channel->b_stid, &pid);
-       if (ret)
-       {
-               stack_error:
-               PERROR("mISDN_set_stack() failed (ret=%d) to add bchannel stid=0x%x\n", ret, channel->b_stid);
-               mISDN_write_frame(bchannel_device, buff, channel->b_addr, MGR_DELLAYER | REQUEST, 0, 0, NULL, TIMEOUT_1SEC);
-               goto failed;
+       addr.dev = (bchannel->handle>>8);
+       addr.channel = bchannel->handle & 0xff;
+       ret = bind(bchannel->b_sock, (struct sockaddr *)&addr, sizeof(addr));
+       if (ret < 0) {
+               CERROR(bchannel->call, NULL, "Failed to bind bchannel-socket for handle 0x%x with mISDN-DSP layer. (port %d, channel %d) Did you load mISDN_dsp.ko?\n", bchannel->handle, addr.dev, addr.channel);
+               unregister_fd(&bchannel->lcr_fd);
+               close(bchannel->b_sock);
+               bchannel->b_sock = -1;
+               return 0;
        }
-       ret = mISDN_get_setstack_ind(bchannel_device, channel->b_addr);
-       if (ret)
-               goto stack_error;
-
-       /* get layer id */
-       channel->b_addr = mISDN_get_layerid(bchannel_device, channel->b_stid, 4);
-       if (!channel->b_addr)
-               goto stack_error;
-#if 0
-       chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL create stack", DIRECTION_OUT);
-       add_trace("channel", NULL, "%d", i+1+(i>=15));
-       add_trace("stack", "id", "0x%08x", mISDNport->b_stid[i]);
-       add_trace("stack", "address", "0x%08x", mISDNport->b_addr[i]);
-       end_trace();
-#endif
-#endif
-
-       return(1);
 
-failed:
-       channel->b_stid = 0;
-       channel->b_addr = 0;
-       return(0);
+       /* queue */
+       if (bchannel->b_mode == 1 && queue) {
+               bchannel->nodsp_queue_out = 0;
+               bchannel->nodsp_queue_in = queue * 8;
+               if (bchannel->nodsp_queue_in > QUEUE_BUFFER_MAX-1)
+                       bchannel->nodsp_queue_in = QUEUE_BUFFER_MAX-1;
+               bchannel->nodsp_queue = bchannel->nodsp_queue_in; /* store initial load */
+               memset(&bchannel->nodsp_queue_buffer, (options.law=='a')?0x2a:0xff, QUEUE_BUFFER_SIZE);
+               bchannel->queue_sent = 0;
+       } else
+               bchannel->nodsp_queue = 0;
+                                                                                
+       return 1;
 }
 
 
 /*
  * activate / deactivate request
  */
-void bchannel_activate(struct bchannel *channel, int activate)
+void bchannel_activate(struct bchannel *bchannel, int activate)
 {
-#ifdef SOCKET_MISDN
        struct mISDNhead act;
        int ret;
 
-       act.prim = (activate)?DL_ESTABLISH_REQ:DL_RELEASE_REQ; 
-       act.id = 0;
-       ret = sendto(channel->b_sock, &act, MISDN_HEADER_LEN, 0, NULL, 0);
-       if (!ret)
-               PERROR("Failed to send to socket %d\n", channel->b_sock);
-#else
-       iframe_t act;
-
        /* activate bchannel */
-       act.prim = (activate?DL_ESTABLISH:DL_RELEASE) | REQUEST; 
-       act.addr = channel->b_addr | FLG_MSG_DOWN;
-       act.dinfo = 0;
-       act.len = 0;
-       mISDN_write(bchannel_device, &act, mISDN_HEADER_LEN+act.len, TIMEOUT_1SEC);
-#endif
+       CDEBUG(bchannel->call, NULL, "%sActivating B-channel.\n", activate?"":"De-");
+       switch(bchannel->b_mode) {
+               case 0:
+               case 2:
+               act.prim = (activate)?DL_ESTABLISH_REQ:DL_RELEASE_REQ; 
+               break;
+               case 1:
+               case 3:
+               act.prim = (activate)?PH_ACTIVATE_REQ:PH_DEACTIVATE_REQ; 
+               break;
+       }
+       act.id = 0;
+       ret = sendto(bchannel->b_sock, &act, MISDN_HEADER_LEN, 0, NULL, 0);
+       if (ret < 0)
+               CERROR(bchannel->call, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
 
-       channel->b_state = BSTATE_ACTIVATING;
-#if 0
-       /* trace */
-       chan_trace_header(mISDNport, mISDNport->b_port[i], activate?(char*)"BCHANNEL activate":(char*)"BCHANNEL deactivate", DIRECTION_OUT);
-       add_trace("channel", NULL, "%d", i+1+(i>=15));
-       end_trace();
-#endif
+       bchannel->b_state = (activate)?BSTATE_ACTIVATING:BSTATE_DEACTIVATING;
 }
 
 
 /*
  * set features
  */
-static void bchannel_activated(struct bchannel *channel)
+static void bchannel_activated(struct bchannel *bchannel)
 {
-#ifdef SOCKET_MISDN
-       int handle;
+       int sock;
 
-       handle = channel->b_sock;
-#else
-       unsigned long handle;
-
-       handle = channel->b_addr;
-#endif
+       sock = bchannel->b_sock;
 
        /* set dsp features */
-       if (channel->b_txdata)
-               ph_control(handle, (channel->b_txdata)?CMX_TXDATA_ON:CMX_TXDATA_OFF, 0, "DSP-TXDATA", channel->b_txdata);
-       if (channel->b_delay)
-               ph_control(handle, CMX_DELAY, channel->b_delay, "DSP-DELAY", channel->b_delay);
-       if (channel->b_tx_dejitter)
-               ph_control(handle, (channel->b_tx_dejitter)?CMX_TX_DEJITTER:CMX_TX_DEJ_OFF, 0, "DSP-DELAY", channel->b_tx_dejitter);
-       if (channel->b_tx_gain)
-               ph_control(handle, VOL_CHANGE_TX, channel->b_tx_gain, "DSP-TX_GAIN", channel->b_tx_gain);
-       if (channel->b_rx_gain)
-               ph_control(handle, VOL_CHANGE_RX, channel->b_rx_gain, "DSP-RX_GAIN", channel->b_rx_gain);
-       if (channel->b_pipeline[0])
-               ph_control_block(handle, PIPELINE_CFG, channel->b_pipeline, strlen(channel->b_pipeline)+1, "DSP-PIPELINE", 0);
-       if (channel->b_conf)
-               ph_control(handle, CMX_CONF_JOIN, channel->b_conf, "DSP-CONF", channel->b_conf);
-       if (channel->b_echo)
-               ph_control(handle, CMX_ECHO_ON, 0, "DSP-ECHO", 1);
-       if (channel->b_tone)
-               ph_control(handle, TONE_PATT_ON, channel->b_tone, "DSP-TONE", channel->b_tone);
-       if (channel->b_rxoff)
-               ph_control(handle, CMX_RECEIVE_OFF, 0, "DSP-RXOFF", 1);
-//     if (channel->b_txmix)
-//             ph_control(handle, CMX_MIX_ON, 0, "DSP-MIX", 1);
-       if (channel->b_dtmf)
-               ph_control(handle, DTMF_TONE_START, 0, "DSP-DTMF", 1);
-       if (channel->b_crypt_len)
-               ph_control_block(handle, BF_ENABLE_KEY, channel->b_crypt_key, channel->b_crypt_len, "DSP-CRYPT", channel->b_crypt_len);
-       if (channel->b_conf)
-               ph_control(handle, CMX_CONF_JOIN, channel->b_conf, "DSP-CONF", channel->b_conf);
-
-       channel->b_state = BSTATE_ACTIVE;
+       if (bchannel->b_txdata)
+               ph_control(sock, (bchannel->b_txdata)?DSP_TXDATA_ON:DSP_TXDATA_OFF, 0, "DSP-TXDATA", bchannel->b_txdata, bchannel->b_mode);
+       if (bchannel->b_delay && bchannel->b_mode == 0)
+               ph_control(sock, DSP_DELAY, bchannel->b_delay, "DSP-DELAY", bchannel->b_delay, bchannel->b_mode);
+       if (bchannel->b_tx_dejitter && bchannel->b_mode == 0)
+               ph_control(sock, (bchannel->b_tx_dejitter)?DSP_TX_DEJITTER:DSP_TX_DEJ_OFF, 0, "DSP-TX_DEJITTER", bchannel->b_tx_dejitter, bchannel->b_mode);
+       if (bchannel->b_tx_gain && bchannel->b_mode == 0)
+               ph_control(sock, DSP_VOL_CHANGE_TX, bchannel->b_tx_gain, "DSP-TX_GAIN", bchannel->b_tx_gain, bchannel->b_mode);
+       if (bchannel->b_rx_gain && bchannel->b_mode == 0)
+               ph_control(sock, DSP_VOL_CHANGE_RX, bchannel->b_rx_gain, "DSP-RX_GAIN", bchannel->b_rx_gain, bchannel->b_mode);
+       if (bchannel->b_pipeline[0] && bchannel->b_mode == 0)
+               ph_control_block(sock, DSP_PIPELINE_CFG, bchannel->b_pipeline, strlen(bchannel->b_pipeline)+1, "DSP-PIPELINE", 0, bchannel->b_mode);
+       if (bchannel->b_conf)
+               ph_control(sock, DSP_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf, bchannel->b_mode);
+       if (bchannel->b_echo)
+               ph_control(sock, DSP_ECHO_ON, 0, "DSP-ECHO", 1, bchannel->b_mode);
+       if (bchannel->b_tone && bchannel->b_mode == 0)
+               ph_control(sock, DSP_TONE_PATT_ON, bchannel->b_tone, "DSP-TONE", bchannel->b_tone, bchannel->b_mode);
+       if (bchannel->b_rxoff)
+               ph_control(sock, DSP_RECEIVE_OFF, 0, "DSP-RXOFF", 1, bchannel->b_mode);
+//     if (bchannel->b_txmix && bchannel->b_mode == 0)
+//             ph_control(sock, DSP_MIX_ON, 0, "DSP-MIX", 1, bchannel->b_mode);
+       if (bchannel->b_dtmf && bchannel->b_mode == 0)
+               ph_control(sock, DTMF_TONE_START, 0, "DSP-DTMF", 1, bchannel->b_mode);
+       if (bchannel->b_bf_len && bchannel->b_mode == 0)
+               ph_control_block(sock, DSP_BF_ENABLE_KEY, bchannel->b_bf_key, bchannel->b_bf_len, "DSP-CRYPT", bchannel->b_bf_len, bchannel->b_mode);
+       if (bchannel->b_conf)
+               ph_control(sock, DSP_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf, bchannel->b_mode);
+
+       bchannel->b_state = BSTATE_ACTIVE;
 }
 
 /*
  * destroy stack
  */
-static void bchannel_destroy(struct bchannel *channel)
+void bchannel_destroy(struct bchannel *bchannel)
 {
-#ifdef SOCKET_MISDN
-#if 0
-       chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL remove socket", DIRECTION_OUT);
-       add_trace("channel", NULL, "%d", i+1+(i>=15));
-       add_trace("socket", NULL, "%d", mISDNport->b_socket[i]);
-       end_trace();
-#endif
-       if (channel->b_sock > -1)
-       {
-               close(channel->b_sock);
-               channel->b_sock = -1;
-       }
-#else
-       unsigned char buff[1024];
-
-#if 0
-       chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL remove stack", DIRECTION_OUT);
-       add_trace("channel", NULL, "%d", i+1+(i>=15));
-       add_trace("stack", "id", "0x%08x", mISDNport->b_stid[i]);
-       add_trace("stack", "address", "0x%08x", mISDNport->b_addr[i]);
-       end_trace();
-#endif
-       /* remove our stack only if set */
-       if (channel->b_addr)
-       {
-               PDEBUG("free stack (b_addr=0x%x)\n", channel->b_addr);
-               mISDN_clear_stack(bchannel_device, channel->b_stid);
-               mISDN_write_frame(bchannel_device, buff, channel->b_addr | FLG_MSG_DOWN, MGR_DELLAYER | REQUEST, 0, 0, NULL, TIMEOUT_1SEC);
-               channel->b_stid = 0;
-               channel->b_addr = 0;
+       if (bchannel->b_sock > -1) {
+               unregister_fd(&bchannel->lcr_fd);
+               close(bchannel->b_sock);
+               bchannel->b_sock = -1;
        }
-#endif
-       channel->b_state = BSTATE_IDLE;
+       bchannel->b_state = BSTATE_IDLE;
 }
 
 
 /*
  * whenever we get audio data from bchannel, we process it here
  */
-static void bchannel_receive(struct bchannel *channel, unsigned long prim, unsigned long dinfo, unsigned char *data, int len)
+static void bchannel_receive(struct bchannel *bchannel, unsigned char *buffer, int len)
 {
-       unsigned long cont = *((unsigned long *)data);
-       unsigned char *data_temp;
-       unsigned long length_temp;
-       unsigned char *p;
-       int l;
-
-       if (prim == (PH_CONTROL | INDICATION))
-       {
-               if (len < 4)
-               {
-                       PERROR("SHORT READ OF PH_CONTROL INDICATION\n");
+       struct mISDNhead *hh = (struct mISDNhead *)buffer;
+       unsigned char *data = buffer + MISDN_HEADER_LEN;
+       unsigned int cont = *((unsigned int *)data);
+       unsigned char *d;
+       int i;
+       struct bchannel *remote_bchannel;
+       int ret;
+
+       if (hh->prim == PH_CONTROL_IND) {
+               /* non dsp -> ignore ph_control */
+               if (bchannel->b_mode == 1 || bchannel->b_mode == 3)
+                       return;
+               if (len < 4) {
+                       CERROR(bchannel->call, NULL, "SHORT READ OF PH_CONTROL INDICATION\n");
                        return;
                }
-               if ((cont&(~DTMF_TONE_MASK)) == DTMF_TONE_VAL)
-               {
-#if 0
-                       chan_trace_header(p_m_mISDNport, this, "BCHANNEL control", DIRECTION_IN);
-                       add_trace("DTMF", NULL, "%c", cont & DTMF_TONE_MASK);
-                       end_trace();
-#endif
-                       if (channel->rx_dtmf)
-                               channel->rx_dtmf(channel, cont & DTMF_TONE_MASK);
+               if ((cont&(~DTMF_TONE_MASK)) == DTMF_TONE_VAL) {
+                       if (bchannel->call)
+                               lcr_in_dtmf(bchannel->call, cont & DTMF_TONE_MASK);
                        return;
                }
-               switch(cont)
-               {
-                       case BF_REJECT:
-#if 0
-                       chan_trace_header(p_m_mISDNport, this, "BCHANNEL control", DIRECTION_IN);
-                       add_trace("DSP-CRYPT", NULL, "error");
-                       end_trace();
-#endif
+               switch(cont) {
+                       case DSP_BF_REJECT:
+                       CERROR(bchannel->call, NULL, "Blowfish crypt rejected.\n");
                        break;
 
-                       case BF_ACCEPT:
-#if 0
-                       chan_trace_header(p_m_mISDNport, this, "BCHANNEL control", DIRECTION_IN);
-                       add_trace("DSP-CRYPT", NULL, "ok");
-                       end_trace();
-#endif
+                       case DSP_BF_ACCEPT:
+                       CDEBUG(bchannel->call, NULL, "Blowfish crypt enabled.\n");
                        break;
 
                        default:
-#if 0
-                       chan_trace_header(p_m_mISDNport, this, "BCHANNEL control", DIRECTION_IN);
-                       add_trace("unknown", NULL, "0x%x", cont);
-                       end_trace();
-#else
-                       ;
-#endif
+                       CDEBUG(bchannel->call, NULL, "Unhandled bchannel control 0x%x.\n", cont);
                }
                return;
        }
-       if (prim == (PH_SIGNAL | INDICATION))
-       {
-               switch(dinfo)
-               {
-                       case CMX_TX_DATA:
-                       if (!channel->b_txdata)
-                       {
-                               /* if tx is off, it may happen that fifos send us pending informations, we just ignore them */
-                               PDEBUG("PmISDN(%s) ignoring tx data, because 'txdata' is turned off\n", p_name);
-                               return;
-                       }
-                       break;
-
-                       default:
-#if 0
-                       chan_trace_header(p_m_mISDNport, this, "BCHANNEL signal", DIRECTION_IN);
-                       add_trace("unknown", NULL, "0x%x", frm->dinfo);
-                       end_trace();
-#else
-                       ;
-#endif
+       if (hh->prim == PH_DATA_REQ) {
+               if (!bchannel->b_txdata) {
+                       /* if tx is off, it may happen that fifos send us pending informations, we just ignore them */
+                       CDEBUG(bchannel->call, NULL, "ignoring tx data, because 'txdata' is turned off\n");
+                       return;
                }
                return;
        }
-       if (prim != PH_DATA_IND && prim != DL_DATA_IND)
-       {
-               PERROR("Bchannel received unknown primitve: 0x%x\n", prim);
+       if (hh->prim != PH_DATA_IND && hh->prim != DL_DATA_IND) {
+               CERROR(bchannel->call, NULL, "Bchannel received unknown primitve: 0x%lx\n", hh->prim);
+               return;
+       }
+       /* if calls are bridged, but not via dsp (no b_conf), forward here */
+       if (!bchannel->b_conf
+        && bchannel->call
+        && bchannel->call->bridge_call
+        && bchannel->call->bridge_call->bchannel) {
+               remote_bchannel = bchannel->call->bridge_call->bchannel;
+#if 0
+               int i = 0;
+               char string[4096] = "";
+               while(i < len) {
+                       sprintf(string+strlen(string), " %02x", data[i]);
+                       i++;
+               }
+               CDEBUG(remote_bchannel->call, NULL, "Forwarding packet%s\n", string);
+#endif
+               hh->prim = PH_DATA_REQ;
+               hh->id = 0;
+               ret = sendto(remote_bchannel->b_sock, buffer, MISDN_HEADER_LEN+len, 0, NULL, 0);
+               if (ret < 0)
+                       CERROR(remote_bchannel->call, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
                return;
        }
        /* calls will not process any audio data unless
@@ -563,295 +362,354 @@ static void bchannel_receive(struct bchannel *channel, unsigned long prim, unsig
         */
 
        /* if rx is off, it may happen that fifos send us pending informations, we just ignore them */
-       if (channel->b_rxoff)
-       {
-               PDEBUG("PmISDN(%s) ignoring data, because rx is turned off\n", p_name);
+       if (bchannel->b_rxoff) {
+               CDEBUG(bchannel->call, NULL, "ignoring data, because rx is turned off\n");
+               return;
+       }
+
+       if (!bchannel->call) {
+               CDEBUG(bchannel->call, NULL, "ignoring data, because no call associated with bchannel\n");
+               return;
+       }
+       if (!bchannel->call->audiopath) {
+               /* return, because we have no audio from port */
+               return;
+       }
+
+       if (bchannel->call->pipe[1] < 0) {
+               /* nobody there */
                return;
        }
 
-       if (channel->rx_data)
-               channel->rx_data(channel, data, len);
+       /* if no hdlc */
+       if (bchannel->b_mode == 0 || bchannel->b_mode == 1) {
+               d = data;
+               for (i = 0; i < len; i++) {
+                       *d = flip_bits[*d];
+                       d++;
+               }
+       }
+
+       
+       len = write(bchannel->call->pipe[1], data, len);
+       if (len < 0)
+               goto errout;
+
+       return;
+ errout:
+       close(bchannel->call->pipe[1]);
+       bchannel->call->pipe[1] = -1;
+       CDEBUG(bchannel->call, NULL, "broken pipe on bchannel pipe\n");
 }
 
 
 /*
  * transmit data to bchannel
  */
-void bchannel_transmit(struct bchannel *channel, unsigned char *data, int len)
+void bchannel_transmit(struct bchannel *bchannel, unsigned char *data, int len)
 {
-       unsigned char buff[1025];
-       iframe_t *frm = (iframe_t *)buff;
+       unsigned char buff[1024 + MISDN_HEADER_LEN], *p = buff + MISDN_HEADER_LEN;
+       struct mISDNhead *frm = (struct mISDNhead *)buff;
+       int ret;
+       int i;
+       int space, in;
 
-       if (channel->b_state != BSTATE_ACTIVE)
+       if (bchannel->b_state != BSTATE_ACTIVE)
+               return;
+       if (len > 1024 || len < 1)
                return;
-#ifdef SOCKET_MISDN
-       frm->prim = DL_DATA_REQ;
+       if (data) {
+               switch(bchannel->b_mode) {
+               case 0:
+                       for (i = 0; i < len; i++)
+                               *p++ = flip_bits[*data++];
+                       frm->prim = DL_DATA_REQ;
+                       break;
+               case 1:
+                       for (i = 0; i < len; i++)
+                               *p++ = flip_bits[*data++];
+                       frm->prim = PH_DATA_REQ;
+                       break;
+               case 2:
+                       memcpy(p, data, len);
+                       frm->prim = DL_DATA_REQ;
+                       break;
+               case 3:
+                       memcpy(p, data, len);
+                       frm->prim = PH_DATA_REQ;
+                       break;
+               }
+       } else
+               memset(p, flip_bits[(options.law=='a')?0x2a:0xff], len);
        frm->id = 0;
-       ret = sendto(channel->b_sock, data, len, 0, NULL, 0);
-       if (!ret)
-               PERROR("Failed to send to socket %d\n", channel->b_sock);
-#else
-       frm->prim = DL_DATA | REQUEST; 
-       frm->addr = channel->b_addr | FLG_MSG_DOWN;
-       frm->dinfo = 0;
-       frm->len = len;
-       if (frm->len)
-               mISDN_write(bchannel_device, frm, mISDN_HEADER_LEN+frm->len, TIMEOUT_1SEC);
+#ifdef SEAMLESS_TEST
+       unsigned char test_tone[8] = {0x2a, 0x24, 0xb4, 0x24, 0x2a, 0x25, 0xb5, 0x25};
+       p = buff + MISDN_HEADER_LEN;
+       for (i = 0; i < len; i++)
+               *p++ = test_tone[(bchannel->test + i) & 7];
+       bchannel->test = (bchannel->test + len) & 7;
 #endif
+       if (bchannel->nodsp_queue) {
+               space = (bchannel->nodsp_queue_out - bchannel->nodsp_queue_in - 1) & (QUEUE_BUFFER_SIZE - 1);
+               if (len > space) {
+                       CERROR(bchannel->call, NULL, "Queue buffer overflow, space is %d, len is %d.\n", space, len);
+                       return;
+               }
+               p = buff + MISDN_HEADER_LEN;
+               in = bchannel->nodsp_queue_in;
+               for (i = 0; i < len; i++) {
+                       bchannel->nodsp_queue_buffer[in] = *p++;
+                       in = (in + 1) & (QUEUE_BUFFER_SIZE - 1);
+               }
+               bchannel->nodsp_queue_in = in;
+               if (bchannel->queue_sent == 0) /* if there is no pending data */
+                       bchannel_send_queue(bchannel);
+               return;
+       }
+       ret = sendto(bchannel->b_sock, buff, MISDN_HEADER_LEN+len, 0, NULL, 0);
+       if (ret < 0)
+               CERROR(bchannel->call, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
 }
 
 
 /*
- * join bchannel
+ * in case of a send queue, we send from that queue rather directly
  */
-void bchannel_join(struct bchannel *channel, unsigned short id)
+static void bchannel_send_queue(struct bchannel *bchannel)
 {
-#ifdef SOCKET_MISDN
-       int handle;
-
-       handle = channel->b_sock;
-#else
-       unsigned long handle;
+       unsigned char buff[1024 + MISDN_HEADER_LEN], *p = buff + MISDN_HEADER_LEN;
+       struct mISDNhead *frm = (struct mISDNhead *)buff;
+       int ret;
+       int i;
+       int len, out;
 
-       handle = channel->b_addr;
+       len = (bchannel->nodsp_queue_in - bchannel->nodsp_queue_out) & (QUEUE_BUFFER_SIZE - 1);
+       if (len == 0)
+               return; /* mISDN driver received all load */
+#if 0
+       printf("%4d:(%s|%s)\n", bchannel->nodsp_queue_out,
+               "----------------------------------------------------------------"+64-len/(8192/64),
+               "                                                                "+len/(8192/64));
 #endif
-       if (id)
-               channel->b_conf = (id<<16) + bchannel_pid;
+       if (len > 1024)
+               len = 1024;
+       frm->prim = PH_DATA_REQ;
+       frm->id = 0;
+       out = bchannel->nodsp_queue_out;
+       for (i = 0; i < len; i++) {
+               *p++ = bchannel->nodsp_queue_buffer[out];
+               out = (out + 1) & (QUEUE_BUFFER_SIZE - 1);
+       }
+       bchannel->nodsp_queue_out = out;
+       ret = sendto(bchannel->b_sock, buff, MISDN_HEADER_LEN+len, 0, NULL, 0);
+       if (ret < 0)
+               CERROR(bchannel->call, NULL, "Failed to send to socket %d\n", bchannel->b_sock);
        else
-               channel->b_conf = 0;
-       if (channel->b_state == BSTATE_ACTIVE)
-               ph_control(handle, CMX_CONF_JOIN, channel->b_conf, "DSP-CONF", channel->b_conf);
+               bchannel->queue_sent = 1;
 }
 
 
 /*
- * main loop for processing messages from mISDN
+ * join bchannel
  */
-#ifdef SOCKET_MISDN
-int bchannel_handle(void)
+void bchannel_join(struct bchannel *bchannel, unsigned short id)
 {
-       int ret, work = 0;
-       struct bchannel *channel;
-       int i;
-       char buffer[2048+MISDN_HEADER_LEN];
-       struct mISDNhead *hh = (struct mISDNhead *)buffer;
-
-       /* process all bchannels */
-       channel = bchannel_first;
-       while(channel)
-       {
-               /* handle message from bchannel */
-               if (channel->b_sock > -1)
-               {
-                       ret = recv(channel->b_sock, buffer, sizeof(buffer), 0);
-                       if (ret >= MISDN_HEADER_LEN)
-                       {
-                               work = 1;
-                               switch(hh->prim)
-                               {
-                                       /* we don't care about confirms, we use rx data to sync tx */
-                                       case PH_DATA_CONF:
-                                       case DL_DATA_CONF:
-                                       break;
-
-                                       /* we receive audio data, we respond to it AND we send tones */
-                                       case PH_DATA_IND:
-                                       case DL_DATA_IND:
-                                       case PH_SIGNAL_IND:
-                                       case PH_CONTROL | INDICATION:
-                                       bchannel_receive(channel, hh->prim, hh->dinfo, buffer+MISDN_HEADER_LEN, ret-MISDN_HEADER_LEN);
-                                       break;
-
-                                       case PH_ACTIVATE_IND:
-                                       case DL_ESTABLISH_IND:
-                                       case PH_ACTIVATE_CONF:
-                                       case DL_ESTABLISH_CONF:
-                                       PDEBUG("DL_ESTABLISH confirm: bchannel is now activated (socket %d).\n", channel->b_sock);
-                                       bchannel_activated(channel);
-                                       break;
-
-                                       case PH_DEACTIVATE_IND:
-                                       case DL_RELEASE_IND:
-                                       case PH_DEACTIVATE_CONF:
-                                       case DL_RELEASE_CONF:
-                                       PDEBUG("DL_RELEASE confirm: bchannel is now de-activated (socket %d).\n", channel->b_sock);
-//                                     bchannel_deactivated(channel);
-                                       break;
-
-                                       default:
-                                       PERROR("child message not handled: prim(0x%x) socket(%d) msg->len(%d)\n", hh->prim, channel->b_sock, msg->len);
-                               }
-                       } else
-                       {
-                               if (ret < 0 && errno != EWOULDBLOCK)
-                                       PERROR("Read from socket %d failed with return code %d\n", channel->b_sock, ret);
-                       }
-               }
-               channel = channel->next;
+       int sock;
+
+       sock = bchannel->b_sock;
+       if (id) {
+               bchannel->b_conf = (id<<16) + bchannel_pid;
+               bchannel->b_rxoff = 1;
+       } else {
+               bchannel->b_conf = 0;
+               bchannel->b_rxoff = 0;
+       }
+       if (bchannel->b_state == BSTATE_ACTIVE) {
+               ph_control(sock, DSP_RECEIVE_OFF, bchannel->b_rxoff, "DSP-RX_OFF", bchannel->b_conf, bchannel->b_mode);
+               ph_control(sock, DSP_CONF_JOIN, bchannel->b_conf, "DSP-CONF", bchannel->b_conf, bchannel->b_mode);
        }
+}
 
-       /* if we received at least one b-frame, we will return 1 */
-       return(work);
+
+/*
+ * dtmf bchannel
+ */
+void bchannel_dtmf(struct bchannel *bchannel, int on)
+{
+       int sock;
+
+       sock = bchannel->b_sock;
+       bchannel->b_dtmf = on;
+       if (bchannel->b_state == BSTATE_ACTIVE && bchannel->b_mode == 0)
+               ph_control(sock, on?DTMF_TONE_START:DTMF_TONE_STOP, 0, "DSP-DTMF", 1, bchannel->b_mode);
 }
-#else
-int bchannel_handle(void)
+
+
+/*
+ * blowfish bchannel
+ */
+void bchannel_blowfish(struct bchannel *bchannel, unsigned char *key, int len)
 {
-       int i;
-       struct bchannel *channel;
-       iframe_t *frm;
-       unsigned char buffer[2048];
-       struct mISDNhead *hh = (struct mISDNhead *)buffer;
-       int len;
+       int sock;
 
-       /* no device, no read */
-       if (bchannel_device < 0)
-               return(0);
+       sock = bchannel->b_sock;
+       memcpy(bchannel->b_bf_key, key, len);
+       bchannel->b_bf_len = len;
+       if (bchannel->b_state == BSTATE_ACTIVE)
+               ph_control_block(sock, DSP_BF_ENABLE_KEY, bchannel->b_bf_key, bchannel->b_bf_len, "DSP-CRYPT", bchannel->b_bf_len, bchannel->b_mode);
+}
 
-       /* get message from kernel */
-       len = mISDN_read(bchannel_device, buffer, sizeof(buffer), 0);
-       if (len < 0)
-       {
-               if (errno == EAGAIN)
-                       return(0);
-               PERROR("Failed to do mISDN_read()\n");
-               return(0);
-       }
-       if (!len)
-       {
-//             printf("%s: ERROR: mISDN_read() returns nothing\n");
-               return(0);
-       }
-       frm = (iframe_t *)buffer;
-
-       /* global prim */
-       switch(frm->prim)
-       {
-               case MGR_DELLAYER | CONFIRM:
-               case MGR_INITTIMER | CONFIRM:
-               case MGR_ADDTIMER | CONFIRM:
-               case MGR_DELTIMER | CONFIRM:
-               case MGR_REMOVETIMER | CONFIRM:
-               return(1);
-       }
 
-       /* find the mISDNport that belongs to the stack */
-       channel = bchannel_first;
-       while(channel)
-       {
-               if (frm->addr == channel->b_addr)
-                       break;
-               channel = channel->next;
-       } 
-       if (!channel)
-       {
-               PERROR("message belongs to no channel: prim(0x%x) addr(0x%x) msg->len(%d)\n", frm->prim, frm->addr, len);
-               goto out;
-       }
+/*
+ * pipeline bchannel
+ */
+void bchannel_pipeline(struct bchannel *bchannel, char *pipeline)
+{
+       int sock;
 
-       /* b-message */
-       switch(frm->prim)
-       {
-               /* we don't care about confirms, we use rx data to sync tx */
-               case PH_DATA | CONFIRM:
-               case DL_DATA | CONFIRM:
-               break;
+       sock = bchannel->b_sock;
+       strncpy(bchannel->b_pipeline, pipeline, sizeof(bchannel->b_pipeline)-1);
+       if (bchannel->b_state == BSTATE_ACTIVE)
+               ph_control_block(sock, DSP_PIPELINE_CFG, bchannel->b_pipeline, strlen(bchannel->b_pipeline)+1, "DSP-PIPELINE", 0, bchannel->b_mode);
+}
 
-               /* we receive audio data, we respond to it AND we send tones */
-               case PH_DATA | INDICATION:
-               case DL_DATA | INDICATION:
-               case PH_CONTROL | INDICATION:
-               case PH_SIGNAL | INDICATION:
-               bchannel_receive(channel, frm->prim, frm->dinfo, (unsigned char *)frm->data.p, frm->len);
-               break;
 
-               case PH_ACTIVATE | INDICATION:
-               case DL_ESTABLISH | INDICATION:
-               case PH_ACTIVATE | CONFIRM:
-               case DL_ESTABLISH | CONFIRM:
-               PDEBUG( "DL_ESTABLISH confirm: bchannel is now activated (address 0x%x).\n", frm->addr);
-               bchannel_activated(channel);
-               break;
+/*
+ * gain bchannel
+ */
+void bchannel_gain(struct bchannel *bchannel, int gain, int tx)
+{
+       int sock;
 
-               case PH_DEACTIVATE | INDICATION:
-               case DL_RELEASE | INDICATION:
-               case PH_DEACTIVATE | CONFIRM:
-               case DL_RELEASE | CONFIRM:
-               PDEBUG("DL_RELEASE confirm: bchannel is now de-activated (address 0x%x).\n", frm->addr);
-//             bchannel_deactivated(channel);
-               break;
+       sock = bchannel->b_sock;
+       if (tx)
+               bchannel->b_tx_gain = gain;
+       else
+               bchannel->b_rx_gain = gain;
+       if (bchannel->b_state == BSTATE_ACTIVE && bchannel->b_mode == 0)
+               ph_control(sock, (tx)?DSP_VOL_CHANGE_TX:DSP_VOL_CHANGE_RX, gain, (tx)?"DSP-TX_GAIN":"DSP-RX_GAIN", gain, bchannel->b_mode);
+}
+
+
+/*
+ * main loop for processing messages from mISDN
+ */
+static int bchannel_handle(struct lcr_fd *fd, unsigned int what, void *instance, int index)
+{
+       struct bchannel *bchannel = (struct bchannel *)instance;
+       int ret;
+       unsigned char buffer[2048+MISDN_HEADER_LEN];
+       struct mISDNhead *hh = (struct mISDNhead *)buffer;
 
-               default:
-               PERROR("message not handled: prim(0x%x) addr(0x%x) msg->len(%d)\n", frm->prim, frm->addr, len);
+       ret = recv(bchannel->b_sock, buffer, sizeof(buffer), 0);
+       if (ret >= (int)MISDN_HEADER_LEN) {
+               switch(hh->prim) {
+                       /* after a confim, we can send more from queue */
+                       case PH_DATA_CNF:
+                       if (bchannel->nodsp_queue) {
+                               bchannel->queue_sent = 0;
+                               bchannel_send_queue(bchannel);
+                       }
+                       break;
+
+                       /* we receive audio data, we respond to it AND we send tones */
+                       case PH_DATA_IND:
+                       case PH_DATA_REQ:
+                       case DL_DATA_IND:
+                       case PH_CONTROL_IND:
+                       bchannel_receive(bchannel, buffer, ret-MISDN_HEADER_LEN);
+                       break;
+
+                       case PH_ACTIVATE_IND:
+                       case DL_ESTABLISH_IND:
+                       case PH_ACTIVATE_CNF:
+                       case DL_ESTABLISH_CNF:
+                       CDEBUG(bchannel->call, NULL, "DL_ESTABLISH confirm: bchannel is now activated (socket %d).\n", bchannel->b_sock);
+                       bchannel_activated(bchannel);
+                       break;
+
+                       case PH_DEACTIVATE_IND:
+                       case DL_RELEASE_IND:
+                       case PH_DEACTIVATE_CNF:
+                       case DL_RELEASE_CNF:
+                       CDEBUG(bchannel->call, NULL, "DL_RELEASE confirm: bchannel is now de-activated (socket %d).\n", bchannel->b_sock);
+//                                     bchannel_deactivated(bchannel);
+                       break;
+
+                       default:
+                       CERROR(bchannel->call, NULL, "child message not handled: prim(0x%x) socket(%d) data len(%d)\n", hh->prim, bchannel->b_sock, ret - MISDN_HEADER_LEN);
+               }
+       } else {
+//             if (ret < 0 && errno != EWOULDBLOCK)
+               CERROR(bchannel->call, NULL, "Read from socket %d failed with return code %d\n", bchannel->b_sock, ret);
        }
 
-       out:
-       return(1);
+       /* if we received at least one b-frame, we will return 1 */
+       return 0;
 }
-#endif
 
 
 /*
  * bchannel channel handling
  */
 struct bchannel *bchannel_first = NULL;
-struct bchannel *find_bchannel_handle(unsigned long handle)
+struct bchannel *find_bchannel_handle(unsigned int handle)
 {
-       struct bchannel *channel = bchannel_first;
+       struct bchannel *bchannel = bchannel_first;
 
-       while(channel)
-       {
-               if (channel->handle == handle)
+       while(bchannel) {
+               if (bchannel->handle == handle)
                        break;
-               channel = channel->next;
+               bchannel = bchannel->next;
        }
-       return(channel);
+       return bchannel;
 }
 
-struct bchannel *find_bchannel_ref(unsigned long ref)
+#if 0
+struct bchannel *find_bchannel_ref(unsigned int ref)
 {
-       struct bchannel *channel = bchannel_first;
+       struct bchannel *bchannel = bchannel_first;
 
-       while(channel)
-       {
-               if (channel->ref == ref)
+       while(bchannel) {
+               if (bchannel->ref == ref)
                        break;
-               channel = channel->next;
+               bchannel = bchannel->next;
        }
-       return(channel);
+       return bchannel;
 }
+#endif
 
-struct bchannel *alloc_bchannel(unsigned long handle)
+struct bchannel *alloc_bchannel(unsigned int handle)
 {
-       struct bchannel **channelp = &bchannel_first;
+       struct bchannel **bchannelp = &bchannel_first;
 
-       while(*channelp)
-               channelp = &((*channelp)->next);
+       while(*bchannelp)
+               bchannelp = &((*bchannelp)->next);
 
-       *channelp = (struct bchannel *)malloc(sizeof(struct bchannel));
-       if (!*channelp)
-               return(NULL);
-       (*channelp)->handle = handle;
-       (*channelp)->b_state = BSTATE_IDLE;
+       *bchannelp = (struct bchannel *)calloc(1, sizeof(struct bchannel));
+       if (!*bchannelp)
+               return NULL;
+       (*bchannelp)->handle = handle;
+       (*bchannelp)->b_state = BSTATE_IDLE;
+       (*bchannelp)->b_sock = -1;
                
-       return(*channelp);
+       return *bchannelp;
 }
 
-void free_bchannel(struct bchannel *channel)
+void free_bchannel(struct bchannel *bchannel)
 {
        struct bchannel **temp = &bchannel_first;
 
-       while(*temp)
-       {
-               if (*temp == channel)
-               {
+       while(*temp) {
+               if (*temp == bchannel) {
                        *temp = (*temp)->next;
-#ifdef SOCKET_MISDN
-                       if (channel->b_sock > -1)
-#else
-                       if (channel->b_stid)
-#endif
-                               bchannel_destroy(channel);
-                       free(channel);
+                       if (bchannel->b_sock > -1)
+                               bchannel_destroy(bchannel);
+                       if (bchannel->call) {
+                               if (bchannel->call->bchannel)
+                                       bchannel->call->bchannel = NULL;
+                       }
+                       free(bchannel);
                        return;
                }
                temp = &((*temp)->next);