862 lines
22 KiB
C
862 lines
22 KiB
C
/*****************************************************************************\
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** **
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** Linux Call Router **
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** **
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**---------------------------------------------------------------------------**
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** Copyright: Andreas Eversberg **
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** **
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** mISDN channel handlin for remote application **
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** **
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\*****************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <poll.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#ifdef SOCKET_MISDN
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#include <netinet/udp.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include <sys/socket.h>
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#include <pthread.h>
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#else
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#include "mISDNlib.h"
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#include <linux/mISDNif.h>
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#endif
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#include "bchannel.h"
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#ifndef ISDN_PID_L4_B_USER
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#define ISDN_PID_L4_B_USER 0x440000ff
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#endif
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#define PERROR(arg...) fprintf(stderr, ##arg)
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#define PDEBUG(arg...) while(0)
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pid_t bchannel_pid;
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enum {
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BSTATE_IDLE,
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BSTATE_ACTIVATING,
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BSTATE_ACTIVE,
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};
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#ifdef SOCKET_MISDN
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int bchannel_socket = -1;
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int bchannel_initialize(void)
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{
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/* try to open raw socket to check kernel */
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bchannel_socket = socket(PF_ISDN, SOCK_RAW, ISDN_P_BASE);
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if (bchannel_socket < 0)
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{
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PERROR("Cannot open mISDN due to %s. (Does your Kernel support socket based mISDN?)\n", strerror(errno));
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return(-1);
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}
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mISDN_debug_init(global_debug, NULL, NULL, NULL);
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bchannel_pid = get_pid();
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/* init mlayer3 */
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init_layer3(4); // buffer of 4
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return(0);
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}
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void bchannel_deinitialize(void)
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{
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cleanup_layer3();
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mISDN_debug_close();
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if (bchannel_socket > -1)
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close(bchannel_socket);
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}
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#else
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int bchannel_entity = 0; /* used for udevice */
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int bchannel_device = -1; /* the device handler and port list */
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int bchannel_initialize(void)
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{
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char debug_log[128];
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unsigned char buff[1025];
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iframe_t *frm = (iframe_t *)buff;
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int ret;
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/* open mISDNdevice if not already open */
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if (bchannel_device < 0)
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{
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ret = mISDN_open();
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if (ret < 0)
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{
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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));
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return(-1);
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}
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bchannel_device = ret;
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PDEBUG("mISDN device opened.\n");
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/* create entity for layer 3 TE-mode */
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mISDN_write_frame(bchannel_device, buff, 0, MGR_NEWENTITY | REQUEST, 0, 0, NULL, TIMEOUT_1SEC);
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ret = mISDN_read_frame(bchannel_device, frm, sizeof(iframe_t), 0, MGR_NEWENTITY | CONFIRM, TIMEOUT_1SEC);
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if (ret < (int)mISDN_HEADER_LEN)
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{
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noentity:
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PERROR("Cannot request MGR_NEWENTITY from mISDN. Exitting due to software bug.");
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return(-1);
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}
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bchannel_entity = frm->dinfo & 0xffff;
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if (!bchannel_entity)
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goto noentity;
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}
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return(0);
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}
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void bchannel_deinitialize(void)
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{
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unsigned char buff[1025];
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if (bchannel_device >= 0)
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{
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/* free entity */
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mISDN_write_frame(bchannel_device, buff, 0, MGR_DELENTITY | REQUEST, bchannel_entity, 0, NULL, TIMEOUT_1SEC);
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/* close device */
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mISDN_close(bchannel_device);
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bchannel_device = -1;
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}
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}
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#endif
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/*
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* send control information to the channel (dsp-module)
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*/
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static void ph_control(unsigned long handle, unsigned long c1, unsigned long c2, char *trace_name, int trace_value)
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{
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#ifdef SOCKET_MISDN
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unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+sizeof(int)];
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struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
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unsigned long *d = buffer+MISDN_HEADER_LEN;
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int ret;
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ctrl->prim = PH_CONTROL_REQ;
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ctrl->id = 0;
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*d++ = c1;
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*d++ = c2;
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ret = sendto(handle, buffer, MISDN_HEADER_LEN+sizeof(int)*2, 0, NULL, 0);
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if (!ret)
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PERROR("Failed to send to socket %d\n", handle);
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#else
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unsigned char buffer[mISDN_HEADER_LEN+sizeof(int)+sizeof(int)];
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iframe_t *ctrl = (iframe_t *)buffer;
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unsigned long *d = (unsigned long *)&ctrl->data.p;
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ctrl->prim = PH_CONTROL | REQUEST;
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ctrl->addr = handle | FLG_MSG_DOWN;
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ctrl->dinfo = 0;
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ctrl->len = sizeof(int)*2;
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*d++ = c1;
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*d++ = c2;
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mISDN_write(bchannel_device, ctrl, mISDN_HEADER_LEN+ctrl->len, TIMEOUT_1SEC);
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#endif
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#if 0
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chan_trace_header(mISDNport, isdnport, "BCHANNEL control", DIRECTION_OUT);
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if (c1 == CMX_CONF_JOIN)
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add_trace(trace_name, NULL, "0x%08x", trace_value);
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else
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add_trace(trace_name, NULL, "%d", trace_value);
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end_trace();
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#endif
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}
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static void ph_control_block(unsigned long handle, unsigned long c1, void *c2, int c2_len, char *trace_name, int trace_value)
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{
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#ifdef SOCKET_MISDN
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unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+c2_len];
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struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
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unsigned long *d = buffer+MISDN_HEADER_LEN;
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int ret;
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ctrl->prim = PH_CONTROL_REQ;
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ctrl->id = 0;
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*d++ = c1;
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memcpy(d, c2, c2_len);
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ret = sendto(handle, buffer, MISDN_HEADER_LEN+sizeof(int)+c2_len, 0, NULL, 0);
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if (!ret)
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PERROR("Failed to send to socket %d\n", handle);
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#else
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unsigned char buffer[mISDN_HEADER_LEN+sizeof(int)+c2_len];
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iframe_t *ctrl = (iframe_t *)buffer;
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unsigned long *d = (unsigned long *)&ctrl->data.p;
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ctrl->prim = PH_CONTROL | REQUEST;
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ctrl->addr = handle | FLG_MSG_DOWN;
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ctrl->dinfo = 0;
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ctrl->len = sizeof(int)+c2_len;
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*d++ = c1;
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memcpy(d, c2, c2_len);
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mISDN_write(bchannel_device, ctrl, mISDN_HEADER_LEN+ctrl->len, TIMEOUT_1SEC);
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#endif
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#if 0
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chan_trace_header(mISDNport, isdnport, "BCHANNEL control", DIRECTION_OUT);
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add_trace(trace_name, NULL, "%d", trace_value);
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end_trace();
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#endif
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}
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/*
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* create stack
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*/
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int bchannel_create(struct bchannel *channel)
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{
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unsigned char buff[1024];
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int ret;
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#ifdef SOCKET_MISDN
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unsigned long on = 1;
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struct sockadd_mISDN addr;
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if (channel->b_sock)
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{
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PERROR("Error: Socket already created for handle 0x%x\n", channel->handle);
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return(0);
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}
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/* open socket */
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channel->b_sock = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_B_L2DSP);
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if (channel->b_sock < 0)
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{
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PERROR("Error: Failed to open bchannel-socket for handle 0x%x with mISDN-DSP layer. Did you load mISDNdsp.ko?\n", channel->handle);
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return(0);
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}
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/* set nonblocking io */
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ret = ioctl(channel->b_sock, FIONBIO, &on);
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if (ret < 0)
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{
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PERROR("Error: Failed to set bchannel-socket handle 0x%x into nonblocking IO\n", channel->handle);
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close(channel->b_sock);
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channel->b_sock = -1;
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return(0);
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}
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/* bind socket to bchannel */
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addr.family = AF_ISDN;
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addr.dev = (channel->handle>>8)-1;
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addr.channel = channel->handle && 0xff;
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ret = bind(channel->b_sock, (struct sockaddr *)&addr, sizeof(addr));
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if (ret < 0)
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{
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PERROR("Error: Failed to bind bchannel-socket for handle 0x%x with mISDN-DSP layer. Did you load mISDNdsp.ko?\n", channel->handle);
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close(channel->b_sock);
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channel->b_sock = -1;
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return(0);
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}
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#if 0
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chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL create socket", DIRECTION_OUT);
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add_trace("channel", NULL, "%d", i+1+(i>=15));
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add_trace("socket", NULL, "%d", mISDNport->b_socket[i]);
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end_trace();
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#endif
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#else
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layer_info_t li;
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mISDN_pid_t pid;
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if (channel->b_stid)
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{
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PERROR("Error: stack already created for address 0x%x\n", channel->b_stid);
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return(0);
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}
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if (channel->b_addr)
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{
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PERROR("Error: stack already created for address 0x%x\n", channel->b_addr);
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return(0);
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}
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/* create new layer */
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PDEBUG("creating new layer for stid 0x%x.\n" , channel->handle);
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memset(&li, 0, sizeof(li));
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memset(&pid, 0, sizeof(pid));
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li.object_id = -1;
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li.extentions = 0;
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li.st = channel->handle;
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strcpy(li.name, "B L4");
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li.pid.layermask = ISDN_LAYER((4));
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li.pid.protocol[4] = ISDN_PID_L4_B_USER;
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ret = mISDN_new_layer(bchannel_device, &li);
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if (ret)
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{
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failed_new_layer:
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PERROR("mISDN_new_layer() failed to add bchannel for stid 0x%x.\n", channel->handle);
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goto failed;
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}
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if (!li.id)
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{
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goto failed_new_layer;
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}
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channel->b_stid = channel->handle;
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channel->b_addr = li.id;
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PDEBUG("new layer (b_addr=0x%x)\n", channel->b_addr);
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/* create new stack */
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pid.protocol[1] = ISDN_PID_L1_B_64TRANS;
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pid.protocol[2] = ISDN_PID_L2_B_TRANS;
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pid.protocol[3] = ISDN_PID_L3_B_DSP;
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pid.protocol[4] = ISDN_PID_L4_B_USER;
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pid.layermask = ISDN_LAYER((1)) | ISDN_LAYER((2)) | ISDN_LAYER((3)) | ISDN_LAYER((4));
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ret = mISDN_set_stack(bchannel_device, channel->b_stid, &pid);
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if (ret)
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{
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stack_error:
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PERROR("mISDN_set_stack() failed (ret=%d) to add bchannel stid=0x%x\n", ret, channel->b_stid);
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mISDN_write_frame(bchannel_device, buff, channel->b_addr, MGR_DELLAYER | REQUEST, 0, 0, NULL, TIMEOUT_1SEC);
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goto failed;
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}
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ret = mISDN_get_setstack_ind(bchannel_device, channel->b_addr);
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if (ret)
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goto stack_error;
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/* get layer id */
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channel->b_addr = mISDN_get_layerid(bchannel_device, channel->b_stid, 4);
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if (!channel->b_addr)
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goto stack_error;
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#if 0
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chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL create stack", DIRECTION_OUT);
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add_trace("channel", NULL, "%d", i+1+(i>=15));
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add_trace("stack", "id", "0x%08x", mISDNport->b_stid[i]);
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add_trace("stack", "address", "0x%08x", mISDNport->b_addr[i]);
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end_trace();
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#endif
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#endif
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return(1);
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failed:
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channel->b_stid = 0;
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channel->b_addr = 0;
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return(0);
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}
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/*
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* activate / deactivate request
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*/
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void bchannel_activate(struct bchannel *channel, int activate)
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{
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#ifdef SOCKET_MISDN
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struct mISDNhead act;
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int ret;
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act.prim = (activate)?DL_ESTABLISH_REQ:DL_RELEASE_REQ;
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act.id = 0;
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ret = sendto(channel->b_sock, &act, MISDN_HEADER_LEN, 0, NULL, 0);
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if (!ret)
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PERROR("Failed to send to socket %d\n", channel->b_sock);
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#else
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iframe_t act;
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/* activate bchannel */
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act.prim = (activate?DL_ESTABLISH:DL_RELEASE) | REQUEST;
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act.addr = channel->b_addr | FLG_MSG_DOWN;
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act.dinfo = 0;
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act.len = 0;
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mISDN_write(bchannel_device, &act, mISDN_HEADER_LEN+act.len, TIMEOUT_1SEC);
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#endif
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channel->b_state = BSTATE_ACTIVATING;
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#if 0
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/* trace */
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chan_trace_header(mISDNport, mISDNport->b_port[i], activate?(char*)"BCHANNEL activate":(char*)"BCHANNEL deactivate", DIRECTION_OUT);
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add_trace("channel", NULL, "%d", i+1+(i>=15));
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end_trace();
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#endif
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}
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/*
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* set features
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*/
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static void bchannel_activated(struct bchannel *channel)
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{
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#ifdef SOCKET_MISDN
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int handle;
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handle = channel->b_sock;
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#else
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unsigned long handle;
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handle = channel->b_addr;
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#endif
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/* set dsp features */
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if (channel->b_txdata)
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ph_control(handle, (channel->b_txdata)?CMX_TXDATA_ON:CMX_TXDATA_OFF, 0, "DSP-TXDATA", channel->b_txdata);
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if (channel->b_delay)
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ph_control(handle, CMX_DELAY, channel->b_delay, "DSP-DELAY", channel->b_delay);
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if (channel->b_tx_dejitter)
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ph_control(handle, (channel->b_tx_dejitter)?CMX_TX_DEJITTER:CMX_TX_DEJ_OFF, 0, "DSP-DELAY", channel->b_tx_dejitter);
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if (channel->b_tx_gain)
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ph_control(handle, VOL_CHANGE_TX, channel->b_tx_gain, "DSP-TX_GAIN", channel->b_tx_gain);
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if (channel->b_rx_gain)
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ph_control(handle, VOL_CHANGE_RX, channel->b_rx_gain, "DSP-RX_GAIN", channel->b_rx_gain);
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if (channel->b_pipeline[0])
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ph_control_block(handle, PIPELINE_CFG, channel->b_pipeline, strlen(channel->b_pipeline)+1, "DSP-PIPELINE", 0);
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if (channel->b_conf)
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ph_control(handle, CMX_CONF_JOIN, channel->b_conf, "DSP-CONF", channel->b_conf);
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if (channel->b_echo)
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ph_control(handle, CMX_ECHO_ON, 0, "DSP-ECHO", 1);
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if (channel->b_tone)
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ph_control(handle, TONE_PATT_ON, channel->b_tone, "DSP-TONE", channel->b_tone);
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if (channel->b_rxoff)
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ph_control(handle, CMX_RECEIVE_OFF, 0, "DSP-RXOFF", 1);
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// if (channel->b_txmix)
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// ph_control(handle, CMX_MIX_ON, 0, "DSP-MIX", 1);
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if (channel->b_dtmf)
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ph_control(handle, DTMF_TONE_START, 0, "DSP-DTMF", 1);
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if (channel->b_crypt_len)
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ph_control_block(handle, BF_ENABLE_KEY, channel->b_crypt_key, channel->b_crypt_len, "DSP-CRYPT", channel->b_crypt_len);
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if (channel->b_conf)
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ph_control(handle, CMX_CONF_JOIN, channel->b_conf, "DSP-CONF", channel->b_conf);
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channel->b_state = BSTATE_ACTIVE;
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}
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/*
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* destroy stack
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*/
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static void bchannel_destroy(struct bchannel *channel)
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{
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#ifdef SOCKET_MISDN
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#if 0
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chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL remove socket", DIRECTION_OUT);
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add_trace("channel", NULL, "%d", i+1+(i>=15));
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add_trace("socket", NULL, "%d", mISDNport->b_socket[i]);
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end_trace();
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#endif
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if (channel->b_sock > -1)
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{
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close(channel->b_sock);
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channel->b_sock = -1;
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}
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#else
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unsigned char buff[1024];
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#if 0
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chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL remove stack", DIRECTION_OUT);
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add_trace("channel", NULL, "%d", i+1+(i>=15));
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add_trace("stack", "id", "0x%08x", mISDNport->b_stid[i]);
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add_trace("stack", "address", "0x%08x", mISDNport->b_addr[i]);
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end_trace();
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#endif
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/* remove our stack only if set */
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if (channel->b_addr)
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{
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PDEBUG("free stack (b_addr=0x%x)\n", channel->b_addr);
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mISDN_clear_stack(bchannel_device, channel->b_stid);
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mISDN_write_frame(bchannel_device, buff, channel->b_addr | FLG_MSG_DOWN, MGR_DELLAYER | REQUEST, 0, 0, NULL, TIMEOUT_1SEC);
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channel->b_stid = 0;
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channel->b_addr = 0;
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}
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#endif
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channel->b_state = BSTATE_IDLE;
|
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}
|
|
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
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");
|
|
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);
|
|
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
|
|
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
|
|
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
|
|
}
|
|
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
|
|
}
|
|
return;
|
|
}
|
|
if (prim != PH_DATA_IND && prim != DL_DATA_IND)
|
|
{
|
|
PERROR("Bchannel received unknown primitve: 0x%x\n", prim);
|
|
return;
|
|
}
|
|
/* calls will not process any audio data unless
|
|
* the call is connected OR interface features audio during call setup.
|
|
*/
|
|
|
|
/* 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);
|
|
return;
|
|
}
|
|
|
|
if (channel->rx_data)
|
|
channel->rx_data(channel, data, len);
|
|
}
|
|
|
|
|
|
/*
|
|
* transmit data to bchannel
|
|
*/
|
|
void bchannel_transmit(struct bchannel *channel, unsigned char *data, int len)
|
|
{
|
|
unsigned char buff[1025];
|
|
iframe_t *frm = (iframe_t *)buff;
|
|
|
|
if (channel->b_state != BSTATE_ACTIVE)
|
|
return;
|
|
#ifdef SOCKET_MISDN
|
|
frm->prim = DL_DATA_REQ;
|
|
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);
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* join bchannel
|
|
*/
|
|
void bchannel_join(struct bchannel *channel, unsigned short id)
|
|
{
|
|
#ifdef SOCKET_MISDN
|
|
int handle;
|
|
|
|
handle = channel->b_sock;
|
|
#else
|
|
unsigned long handle;
|
|
|
|
handle = channel->b_addr;
|
|
#endif
|
|
if (id)
|
|
channel->b_conf = (id<<16) + bchannel_pid;
|
|
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);
|
|
}
|
|
|
|
|
|
/*
|
|
* main loop for processing messages from mISDN
|
|
*/
|
|
#ifdef SOCKET_MISDN
|
|
int bchannel_handle(void)
|
|
{
|
|
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;
|
|
}
|
|
|
|
/* if we received at least one b-frame, we will return 1 */
|
|
return(work);
|
|
}
|
|
#else
|
|
int bchannel_handle(void)
|
|
{
|
|
int i;
|
|
struct bchannel *channel;
|
|
iframe_t *frm;
|
|
unsigned char buffer[2048];
|
|
struct mISDNhead *hh = (struct mISDNhead *)buffer;
|
|
int len;
|
|
|
|
/* no device, no read */
|
|
if (bchannel_device < 0)
|
|
return(0);
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* 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;
|
|
|
|
/* 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;
|
|
|
|
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;
|
|
|
|
default:
|
|
PERROR("message not handled: prim(0x%x) addr(0x%x) msg->len(%d)\n", frm->prim, frm->addr, len);
|
|
}
|
|
|
|
out:
|
|
return(1);
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* bchannel channel handling
|
|
*/
|
|
struct bchannel *bchannel_first = NULL;
|
|
struct bchannel *find_bchannel_handle(unsigned long handle)
|
|
{
|
|
struct bchannel *channel = bchannel_first;
|
|
|
|
while(channel)
|
|
{
|
|
if (channel->handle == handle)
|
|
break;
|
|
channel = channel->next;
|
|
}
|
|
return(channel);
|
|
}
|
|
|
|
struct bchannel *find_bchannel_ref(unsigned long ref)
|
|
{
|
|
struct bchannel *channel = bchannel_first;
|
|
|
|
while(channel)
|
|
{
|
|
if (channel->ref == ref)
|
|
break;
|
|
channel = channel->next;
|
|
}
|
|
return(channel);
|
|
}
|
|
|
|
struct bchannel *alloc_bchannel(unsigned long handle)
|
|
{
|
|
struct bchannel **channelp = &bchannel_first;
|
|
|
|
while(*channelp)
|
|
channelp = &((*channelp)->next);
|
|
|
|
*channelp = (struct bchannel *)malloc(sizeof(struct bchannel));
|
|
if (!*channelp)
|
|
return(NULL);
|
|
(*channelp)->handle = handle;
|
|
(*channelp)->b_state = BSTATE_IDLE;
|
|
|
|
return(*channelp);
|
|
}
|
|
|
|
void free_bchannel(struct bchannel *channel)
|
|
{
|
|
struct bchannel **temp = &bchannel_first;
|
|
|
|
while(*temp)
|
|
{
|
|
if (*temp == channel)
|
|
{
|
|
*temp = (*temp)->next;
|
|
#ifdef SOCKET_MISDN
|
|
if (channel->b_sock > -1)
|
|
#else
|
|
if (channel->b_stid)
|
|
#endif
|
|
bchannel_destroy(channel);
|
|
free(channel);
|
|
return;
|
|
}
|
|
temp = &((*temp)->next);
|
|
}
|
|
}
|
|
|
|
|