1 /*****************************************************************************\
5 **---------------------------------------------------------------------------**
6 ** Copyright: Andreas Eversberg **
8 ** loopback interface functions **
10 \*****************************************************************************/
14 struct mISDNloop mISDNloop = { -1, 0 };
16 void mISDNloop_close(void)
18 if (mISDNloop.sock > -1)
19 close(mISDNloop.sock);
28 struct sockaddr_mISDN addr;
29 struct mISDN_devinfo devinfo;
33 if (mISDNloop.sock > -1)
36 PDEBUG(DEBUG_PORT, "Open external interface of loopback.\n");
38 /* check port counts */
39 ret = ioctl(mISDNsocket, IMGETCOUNT, &cnt);
41 fprintf(stderr, "Cannot get number of mISDN devices. (ioctl IMGETCOUNT failed ret=%d)\n", ret);
46 PERROR_RUNTIME("Found no card. Please be sure to load card drivers.\n");
49 mISDNloop.port = mISDN_getportbyname(mISDNsocket, cnt, options.loopback_ext);
50 if (mISDNloop.port < 0) {
51 PERROR_RUNTIME("Port name '%s' not found, did you load loopback interface?.\n", options.loopback_ext);
52 return mISDNloop.port;
56 devinfo.id = mISDNloop.port;
57 ret = ioctl(mISDNsocket, IMGETDEVINFO, &devinfo);
59 PERROR_RUNTIME("Cannot get device information for port %d. (ioctl IMGETDEVINFO failed ret=%d)\n", mISDNloop.port, ret);
62 if (devinfo.Dprotocols & (1 << ISDN_P_TE_S0)) {
65 if (devinfo.Dprotocols & (1 << ISDN_P_TE_E1)) {
69 PERROR_RUNTIME("loop port %d does not support TE PRI or TE BRI.\n", mISDNloop.port);
72 if ((mISDNloop.sock = socket(PF_ISDN, SOCK_DGRAM, (pri)?ISDN_P_TE_E1:ISDN_P_TE_S0)) < 0) {
73 PERROR_RUNTIME("loop port %d failed to open socket.\n", mISDNloop.port);
75 return mISDNloop.sock;
77 /* set nonblocking io */
78 if ((ret = ioctl(mISDNloop.sock, FIONBIO, &on)) < 0) {
79 PERROR_RUNTIME("loop port %d failed to set socket into nonblocking io.\n", mISDNloop.port);
83 /* bind socket to dchannel */
84 memset(&addr, 0, sizeof(addr));
85 addr.family = AF_ISDN;
86 addr.dev = mISDNloop.port;
88 if ((ret = bind(mISDNloop.sock, (struct sockaddr *)&addr, sizeof(addr))) < 0) {
89 PERROR_RUNTIME("loop port %d failed to bind socket. (name = %s errno=%d)\n", mISDNloop.port, options.loopback_ext, errno);
97 int loop_hunt_bchannel(class PmISDN *port, struct mISDNport *mISDNport)
101 char map[mISDNport->b_num];
102 struct interface *interface;
103 struct interface_port *ifport;
105 chan_trace_header(mISDNport, port, "CHANNEL SELECTION (setup)", DIRECTION_NONE);
106 add_trace("channel", "reserved", "%d", mISDNport->b_reserved);
107 if (mISDNport->b_reserved >= mISDNport->b_num) { // of out chan..
108 add_trace("conclusion", NULL, "all channels are reserved");
110 return(-34); // no channel
113 /* map all used ports of shared loopback interface */
114 memset(map, 0, sizeof(map));
115 interface = interface_first;
117 ifport = interface->ifport;
119 if (!strcmp(ifport->portname, options.loopback_lcr)) {
121 while(i < mISDNport->b_num) {
122 if (mISDNport->b_port[i])
127 ifport = ifport->next;
129 interface = interface->next;
135 while(i < mISDNport->b_num) {
137 channel = i+1+(i>=15);
143 add_trace("conclusion", NULL, "no channel available");
145 return(-6); // channel unacceptable
147 add_trace("conclusion", NULL, "channel available");
148 add_trace("connect", "channel", "%d", channel);