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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 | /* * Callbacks for the FSM * * Copyright (C) 1996 Universidade de Lisboa * * Written by Pedro Roque Marques (roque@di.fc.ul.pt) * * This software may be used and distributed according to the terms of * the GNU General Public License, incorporated herein by reference. */ /* * Fix: 19981230 - Carlos Morgado <chbm@techie.com> * Port of Nelson Escravana's <nelson.escravana@usa.net> fix to CalledPN * NULL pointer dereference in cb_in_1 (originally fixed in 2.0) */ #include <linux/string.h> #include <linux/kernel.h> #include <linux/types.h> #include <linux/mm.h> #include <linux/skbuff.h> #include <asm/io.h> #include <linux/isdnif.h> #include "pcbit.h" #include "layer2.h" #include "edss1.h" #include "callbacks.h" #include "capi.h" ushort last_ref_num = 1; /* * send_conn_req * */ void cb_out_1(struct pcbit_dev *dev, struct pcbit_chan *chan, struct callb_data *cbdata) { struct sk_buff *skb; int len; ushort refnum; #ifdef DEBUG printk(KERN_DEBUG "Called Party Number: %s\n", cbdata->data.setup.CalledPN); #endif /* * hdr - kmalloc in capi_conn_req * - kfree when msg has been sent */ if ((len = capi_conn_req(cbdata->data.setup.CalledPN, &skb, chan->proto)) < 0) { printk("capi_conn_req failed\n"); return; } refnum = last_ref_num++ & 0x7fffU; chan->callref = 0; chan->layer2link = 0; chan->snum = 0; chan->s_refnum = refnum; pcbit_l2_write(dev, MSG_CONN_REQ, refnum, skb, len); } /* * rcv CONNECT * will go into ACTIVE state * send CONN_ACTIVE_RESP * send Select protocol request */ void cb_out_2(struct pcbit_dev *dev, struct pcbit_chan *chan, struct callb_data *data) { isdn_ctrl ictl; struct sk_buff *skb; int len; ushort refnum; if ((len = capi_conn_active_resp(chan, &skb)) < 0) { printk("capi_conn_active_req failed\n"); return; } refnum = last_ref_num++ & 0x7fffU; chan->s_refnum = refnum; pcbit_l2_write(dev, MSG_CONN_ACTV_RESP, refnum, skb, len); ictl.command = ISDN_STAT_DCONN; ictl.driver = dev->id; ictl.arg = chan->id; dev->dev_if->statcallb(&ictl); /* ACTIVE D-channel */ /* Select protocol */ if ((len = capi_select_proto_req(chan, &skb, 1 /*outgoing*/)) < 0) { printk("capi_select_proto_req failed\n"); return; } refnum = last_ref_num++ & 0x7fffU; chan->s_refnum = refnum; pcbit_l2_write(dev, MSG_SELP_REQ, refnum, skb, len); } /* * Incoming call received * inform user */ void cb_in_1(struct pcbit_dev *dev, struct pcbit_chan *chan, struct callb_data *cbdata) { isdn_ctrl ictl; unsigned short refnum; struct sk_buff *skb; int len; ictl.command = ISDN_STAT_ICALL; ictl.driver = dev->id; ictl.arg = chan->id; /* * ictl.num >= strlen() + strlen() + 5 */ if (cbdata->data.setup.CallingPN == NULL) { printk(KERN_DEBUG "NULL CallingPN to phone; using 0\n"); strcpy(ictl.parm.setup.phone, "0"); } else { strcpy(ictl.parm.setup.phone, cbdata->data.setup.CallingPN); } if (cbdata->data.setup.CalledPN == NULL) { printk(KERN_DEBUG "NULL CalledPN to eazmsn; using 0\n"); strcpy(ictl.parm.setup.eazmsn, "0"); } else { strcpy(ictl.parm.setup.eazmsn, cbdata->data.setup.CalledPN); } ictl.parm.setup.si1 = 7; ictl.parm.setup.si2 = 0; ictl.parm.setup.plan = 0; ictl.parm.setup.screen = 0; #ifdef DEBUG printk(KERN_DEBUG "statstr: %s\n", ictl.num); #endif dev->dev_if->statcallb(&ictl); if ((len = capi_conn_resp(chan, &skb)) < 0) { printk(KERN_DEBUG "capi_conn_resp failed\n"); return; } refnum = last_ref_num++ & 0x7fffU; chan->s_refnum = refnum; pcbit_l2_write(dev, MSG_CONN_RESP, refnum, skb, len); } /* * user has replied * open the channel * send CONNECT message CONNECT_ACTIVE_REQ in CAPI */ void cb_in_2(struct pcbit_dev *dev, struct pcbit_chan *chan, struct callb_data *data) { unsigned short refnum; struct sk_buff *skb; int len; if ((len = capi_conn_active_req(chan, &skb)) < 0) { printk(KERN_DEBUG "capi_conn_active_req failed\n"); return; } refnum = last_ref_num++ & 0x7fffU; chan->s_refnum = refnum; printk(KERN_DEBUG "sending MSG_CONN_ACTV_REQ\n"); pcbit_l2_write(dev, MSG_CONN_ACTV_REQ, refnum, skb, len); } /* * CONN_ACK arrived * start b-proto selection * */ void cb_in_3(struct pcbit_dev *dev, struct pcbit_chan *chan, struct callb_data *data) { unsigned short refnum; struct sk_buff *skb; int len; if ((len = capi_select_proto_req(chan, &skb, 0 /*incoming*/)) < 0) { printk("capi_select_proto_req failed\n"); return; } refnum = last_ref_num++ & 0x7fffU; chan->s_refnum = refnum; pcbit_l2_write(dev, MSG_SELP_REQ, refnum, skb, len); } /* * Received disconnect ind on active state * send disconnect resp * send msg to user */ void cb_disc_1(struct pcbit_dev *dev, struct pcbit_chan *chan, struct callb_data *data) { struct sk_buff *skb; int len; ushort refnum; isdn_ctrl ictl; if ((len = capi_disc_resp(chan, &skb)) < 0) { printk("capi_disc_resp failed\n"); return; } refnum = last_ref_num++ & 0x7fffU; chan->s_refnum = refnum; pcbit_l2_write(dev, MSG_DISC_RESP, refnum, skb, len); ictl.command = ISDN_STAT_BHUP; ictl.driver = dev->id; ictl.arg = chan->id; dev->dev_if->statcallb(&ictl); } /* * User HANGUP on active/call proceeding state * send disc.req */ void cb_disc_2(struct pcbit_dev *dev, struct pcbit_chan *chan, struct callb_data *data) { struct sk_buff *skb; int len; ushort refnum; if ((len = capi_disc_req(chan->callref, &skb, CAUSE_NORMAL)) < 0) { printk("capi_disc_req failed\n"); return; } refnum = last_ref_num++ & 0x7fffU; chan->s_refnum = refnum; pcbit_l2_write(dev, MSG_DISC_REQ, refnum, skb, len); } /* * Disc confirm received send BHUP * Problem: when the HL driver sends the disc req itself * LL receives BHUP */ void cb_disc_3(struct pcbit_dev *dev, struct pcbit_chan *chan, struct callb_data *data) { isdn_ctrl ictl; ictl.command = ISDN_STAT_BHUP; ictl.driver = dev->id; ictl.arg = chan->id; dev->dev_if->statcallb(&ictl); } void cb_notdone(struct pcbit_dev *dev, struct pcbit_chan *chan, struct callb_data *data) { } /* * send activate b-chan protocol */ void cb_selp_1(struct pcbit_dev *dev, struct pcbit_chan *chan, struct callb_data *data) { struct sk_buff *skb; int len; ushort refnum; if ((len = capi_activate_transp_req(chan, &skb)) < 0) { printk("capi_conn_activate_transp_req failed\n"); return; } refnum = last_ref_num++ & 0x7fffU; chan->s_refnum = refnum; pcbit_l2_write(dev, MSG_ACT_TRANSP_REQ, refnum, skb, len); } /* * Inform User that the B-channel is available */ void cb_open(struct pcbit_dev *dev, struct pcbit_chan *chan, struct callb_data *data) { isdn_ctrl ictl; ictl.command = ISDN_STAT_BCONN; ictl.driver = dev->id; ictl.arg = chan->id; dev->dev_if->statcallb(&ictl); } |