source/printing/notify.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 2.2
   4    printing backend routines
   5    Copyright (C) Tim Potter, 2002
   6    Copyright (C) Gerald Carter,         2002
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "printing.h"
  24
  25 static TALLOC_CTX *send_ctx;
  26
  27 static struct notify_queue {
  28         struct notify_queue *next, *prev;
  29         void *buf;
  30         size_t buflen;
  31 } *notify_queue_head = NULL;
  32
  33 /*******************************************************************
  34  Used to decide if we need a short select timeout.
  35 *******************************************************************/
  36
  37 BOOL print_notify_messages_pending(void)
  38 {
  39         return (notify_queue_head != NULL);
  40 }
  41
  42 /*******************************************************************
  43  Actually send the batched messages.
  44 *******************************************************************/
  45
  46 void print_notify_send_messages(void)
  47 {
  48         TDB_CONTEXT *tdb;
  49         char *buf;
  50         struct notify_queue *pq;
  51         size_t msg_count = 0, offset = 0;
  52
  53         if (!print_notify_messages_pending())
  54                 return;
  55
  56         if (!send_ctx)
  57                 return;
  58
  59         tdb = conn_tdb_ctx();
  60
  61         if (!tdb) {
  62                 DEBUG(3, ("Failed to open connections database in send_spoolss_notify2_msg\n"));
  63                 return;
  64         }
  65
  66         /* Count the space needed to send the messages. */
  67         for (pq = notify_queue_head; pq; pq = pq->next, msg_count++)
  68                 offset += (pq->buflen + 4);
  69
  70         offset += 4; /* For count. */
  71
  72         buf = talloc(send_ctx, offset);
  73         if (!buf) {
  74                 DEBUG(0,("print_notify_send_messages: Out of memory\n"));
  75                 talloc_destroy_pool(send_ctx);
  76                 return;
  77         }
  78
  79         offset = 0;
  80         SIVAL(buf,offset,msg_count);
  81         offset += 4;
  82         for (pq = notify_queue_head; pq; pq = pq->next) {
  83                 SIVAL(buf,offset,pq->buflen);
  84                 offset += 4;
  85                 memcpy(buf + offset, pq->buf, pq->buflen);
  86                 offset += pq->buflen;
  87         }
  88
  89         DEBUG(5, ("print_notify_send_messages: sending %d print notify message%s\n",
  90                   msg_count, msg_count != 1 ? "s" : ""));
  91
  92         message_send_all(tdb, MSG_PRINTER_NOTIFY2, buf, offset, False, NULL);
  93         talloc_destroy_pool(send_ctx);
  94         notify_queue_head = NULL;
  95 }
  96
  97 /*******************************************************************
  98  Batch up print notify messages.
  99 *******************************************************************/
 100
 101 static void send_spoolss_notify2_msg(struct spoolss_notify_msg *msg)
 102 {
 103         char *buf = NULL;
 104         size_t buflen = 0, len;
 105         struct notify_queue *pnqueue, *tmp_ptr;
 106
 107         /* Let's not waste any time with this */
 108
 109         if (lp_disable_spoolss())
 110                 return;
 111
 112         if (!send_ctx)
 113                 send_ctx = talloc_init_named("print notify queue");
 114
 115         if (!send_ctx)
 116                 goto fail;
 117
 118         /* Flatten data into a message */
 119
 120 again:
 121         len = 0;
 122
 123         /* Pack header */
 124
 125         len += tdb_pack(buf + len, buflen - len, "f", msg->printer);
 126
 127         len += tdb_pack(buf + len, buflen - len, "ddddd",
 128                         msg->type, msg->field, msg->id, msg->len, msg->flags);
 129
 130         /* Pack data */
 131
 132         if (msg->len == 0)
 133                 len += tdb_pack(buf + len, buflen - len, "dd",
 134                                 msg->notify.value[0], msg->notify.value[1]);
 135         else
 136                 len += tdb_pack(buf + len, buflen - len, "B",
 137                                 msg->len, msg->notify.data);
 138
 139         if (buflen != len) {
 140                 buf = talloc_realloc(send_ctx, buf, len);
 141                 if (!buf)
 142                         goto fail;
 143                 buflen = len;
 144                 goto again;
 145         }
 146
 147         /* Store the message on the pending queue. */
 148
 149         pnqueue = talloc(send_ctx, sizeof(*pnqueue));
 150         if (!pnqueue)
 151                 goto fail;
 152
 153         pnqueue->buf = buf;
 154         pnqueue->buflen = buflen;
 155
 156         DEBUG(5, ("send_spoolss_notify2_msg: appending message 0x%02x/0x%02x to notify_queue_head\n", msg->type, msg->field));
 157
 158         /* Note we add to the end of the list to ensure
 159          * the messages are sent in the order they were received. JRA.
 160          */
 161         DLIST_ADD_END(notify_queue_head, pnqueue, tmp_ptr);
 162
 163         return;
 164
 165   fail:
 166
 167         DEBUG(0,("send_spoolss_notify2_msg: Out of memory.\n"));
 168 }
 169
 170 static void send_notify_field_values(const char *printer_name, uint32 type,
 171                                      uint32 field, uint32 id, uint32 value1,
 172                                      uint32 value2, uint32 flags)
 173 {
 174         struct spoolss_notify_msg msg;
 175
 176         ZERO_STRUCT(msg);
 177
 178         fstrcpy(msg.printer, printer_name);
 179         msg.type = type;
 180         msg.field = field;
 181         msg.id = id;
 182         msg.notify.value[0] = value1;
 183         msg.notify.value[1] = value2;
 184         msg.flags = flags;
 185
 186         send_spoolss_notify2_msg(&msg);
 187 }
 188
 189 static void send_notify_field_buffer(const char *printer_name, uint32 type,
 190                                      uint32 field, uint32 id, uint32 len,
 191                                      char *buffer)
 192 {
 193         struct spoolss_notify_msg msg;
 194
 195         ZERO_STRUCT(msg);
 196
 197         fstrcpy(msg.printer, printer_name);
 198         msg.type = type;
 199         msg.field = field;
 200         msg.id = id;
 201         msg.len = len;
 202         msg.notify.data = buffer;
 203
 204         send_spoolss_notify2_msg(&msg);
 205 }
 206
 207 /* Send a message that the printer status has changed */
 208
 209 void notify_printer_status_byname(const char *printer_name, uint32 status)
 210 {
 211         /* Printer status stored in value1 */
 212
 213         send_notify_field_values(printer_name, PRINTER_NOTIFY_TYPE,
 214                                  PRINTER_NOTIFY_STATUS, 0,
 215                                  status, 0, 0);
 216 }
 217
 218 void notify_printer_status(int snum, uint32 status)
 219 {
 220         const char *printer_name = SERVICE(snum);
 221
 222         if (printer_name)
 223                 notify_printer_status_byname(printer_name, status);
 224 }
 225
 226 void notify_job_status_byname(const char *printer_name, uint32 jobid, uint32 status,
 227                               uint32 flags)
 228 {
 229         /* Job id stored in id field, status in value1 */
 230
 231         send_notify_field_values(printer_name, JOB_NOTIFY_TYPE,
 232                                  JOB_NOTIFY_STATUS, jobid,
 233                                  status, 0, flags);
 234 }
 235
 236 void notify_job_status(int snum, uint32 jobid, uint32 status)
 237 {
 238         const char *printer_name = SERVICE(snum);
 239
 240         notify_job_status_byname(printer_name, jobid, status, 0);
 241 }
 242
 243 void notify_job_total_bytes(int snum, uint32 jobid, uint32 size)
 244 {
 245         const char *printer_name = SERVICE(snum);
 246
 247         /* Job id stored in id field, status in value1 */
 248
 249         send_notify_field_values(printer_name, JOB_NOTIFY_TYPE,
 250                                  JOB_NOTIFY_TOTAL_BYTES, jobid,
 251                                  size, 0, 0);
 252 }
 253
 254 void notify_job_total_pages(int snum, uint32 jobid, uint32 pages)
 255 {
 256         const char *printer_name = SERVICE(snum);
 257
 258         /* Job id stored in id field, status in value1 */
 259
 260         send_notify_field_values(printer_name, JOB_NOTIFY_TYPE,
 261                                  JOB_NOTIFY_TOTAL_PAGES, jobid,
 262                                  pages, 0, 0);
 263 }
 264
 265 void notify_job_username(int snum, uint32 jobid, char *name)
 266 {
 267         const char *printer_name = SERVICE(snum);
 268
 269         send_notify_field_buffer(
 270                 printer_name, JOB_NOTIFY_TYPE, JOB_NOTIFY_USER_NAME,
 271                 jobid, strlen(name) + 1, name);
 272 }
 273
 274 void notify_job_name(int snum, uint32 jobid, char *name)
 275 {
 276         const char *printer_name = SERVICE(snum);
 277
 278         send_notify_field_buffer(
 279                 printer_name, JOB_NOTIFY_TYPE, JOB_NOTIFY_DOCUMENT,
 280                 jobid, strlen(name) + 1, name);
 281 }
 282
 283 void notify_job_submitted(int snum, uint32 jobid, time_t submitted)
 284 {
 285         const char *printer_name = SERVICE(snum);
 286
 287         send_notify_field_buffer(
 288                 printer_name, JOB_NOTIFY_TYPE, JOB_NOTIFY_SUBMITTED,
 289                 jobid, sizeof(submitted), (char *)&submitted);
 290 }
 291
 292 void notify_printer_driver(int snum, char *driver_name)
 293 {
 294         const char *printer_name = SERVICE(snum);
 295
 296         send_notify_field_buffer(
 297                 printer_name, PRINTER_NOTIFY_TYPE, PRINTER_NOTIFY_DRIVER_NAME,
 298                 snum, strlen(driver_name) + 1, driver_name);
 299 }
 300
 301 void notify_printer_comment(int snum, char *comment)
 302 {
 303         const char *printer_name = SERVICE(snum);
 304
 305         send_notify_field_buffer(
 306                 printer_name, PRINTER_NOTIFY_TYPE, PRINTER_NOTIFY_COMMENT,
 307                 snum, strlen(comment) + 1, comment);
 308 }
 309
 310 void notify_printer_sharename(int snum, char *share_name)
 311 {
 312         const char *printer_name = SERVICE(snum);
 313
 314         send_notify_field_buffer(
 315                 printer_name, PRINTER_NOTIFY_TYPE, PRINTER_NOTIFY_SHARE_NAME,
 316                 snum, strlen(share_name) + 1, share_name);
 317 }
 318
 319 void notify_printer_port(int snum, char *port_name)
 320 {
 321         const char *printer_name = SERVICE(snum);
 322
 323         send_notify_field_buffer(
 324                 printer_name, PRINTER_NOTIFY_TYPE, PRINTER_NOTIFY_PORT_NAME,
 325                 snum, strlen(port_name) + 1, port_name);
 326 }
 327
 328 void notify_printer_location(int snum, char *location)
 329 {
 330         const char *printer_name = SERVICE(snum);
 331
 332         send_notify_field_buffer(
 333                 printer_name, PRINTER_NOTIFY_TYPE, PRINTER_NOTIFY_LOCATION,
 334                 snum, strlen(location) + 1, location);
 335 }