2 * Asterisk -- An open source telephony toolkit.
4 * Copyright (C) 1999 - 2005, Digium, Inc.
6 * Mark Spencer <markster@digium.com>
8 * Includes code and algorithms from the Zapata library.
10 * See http://www.asterisk.org for more information about
11 * the Asterisk project. Please do not directly contact
12 * any of the maintainers of this project for assistance;
13 * the project provides a web site, mailing lists and IRC
14 * channels for your use.
16 * This program is free software, distributed under the terms of
17 * the GNU General Public License Version 2. See the LICENSE file
18 * at the top of the source tree.
25 * \author Mark Spencer <markster@digium.com>
27 * \note this module is required by app_voicemail and app_getcpeid
28 * \todo Move app_getcpeid into this module
29 * \todo Create a core layer so that app_voicemail does not require
35 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
45 #include "asterisk/ulaw.h"
46 #include "asterisk/alaw.h"
47 #include "asterisk/callerid.h"
48 #include "asterisk/logger.h"
49 #include "asterisk/fskmodem.h"
50 #include "asterisk/channel.h"
51 #include "asterisk/adsi.h"
52 #include "asterisk/module.h"
53 #include "asterisk/config.h"
54 #include "asterisk/file.h"
56 #define DEFAULT_ADSI_MAX_RETRIES 3
58 #define ADSI_MAX_INTRO 20
59 #define ADSI_MAX_SPEED_DIAL 6
61 #define ADSI_FLAG_DATAMODE (1 << 8)
63 static int maxretries = DEFAULT_ADSI_MAX_RETRIES;
65 /* Asterisk ADSI button definitions */
66 #define ADSI_SPEED_DIAL 10 /* 10-15 are reserved for speed dial */
68 static char intro[ADSI_MAX_INTRO][20];
69 static int aligns[ADSI_MAX_INTRO];
71 static char speeddial[ADSI_MAX_SPEED_DIAL][3][20];
73 static int alignment = 0;
75 static int adsi_generate(unsigned char *buf, int msgtype, unsigned char *msg, int msglen, int msgnum, int last, int codec)
80 /* Initial carrier (imaginary) */
88 /* If first message, Send 150ms of MARK's */
90 for (x=0;x<150;x++) /* was 150 */
93 /* Put message type */
97 /* Put message length (plus one for the message number) */
101 /* Put message number */
105 /* Put actual message */
106 for (x=0;x<msglen;x++) {
111 /* Put 2's compliment of sum */
112 PUT_CLID(256-(sum & 0xff));
116 /* Put trailing marks */
125 static int adsi_careful_send(struct ast_channel *chan, unsigned char *buf, int len, int *remainder)
127 /* Sends carefully on a full duplex channel by using reading for
129 struct ast_frame *inf, outf;
132 /* Zero out our outgoing frame */
133 memset(&outf, 0, sizeof(outf));
135 if (remainder && *remainder) {
138 /* Send remainder if provided */
139 if (amt > *remainder)
142 *remainder = *remainder - amt;
143 outf.frametype = AST_FRAME_VOICE;
144 outf.subclass = AST_FORMAT_ULAW;
148 if (ast_write(chan, &outf)) {
149 ast_log(LOG_WARNING, "Failed to carefully write frame\n");
152 /* Update pointers and lengths */
159 /* If we don't get anything at all back in a second, forget
161 if (ast_waitfor(chan, 1000) < 1)
163 inf = ast_read(chan);
167 if (inf->frametype == AST_FRAME_VOICE) {
168 /* Read a voice frame */
169 if (inf->subclass != AST_FORMAT_ULAW) {
170 ast_log(LOG_WARNING, "Channel not in ulaw?\n");
173 /* Send no more than they sent us */
174 if (amt > inf->datalen)
177 *remainder = inf->datalen - amt;
178 outf.frametype = AST_FRAME_VOICE;
179 outf.subclass = AST_FORMAT_ULAW;
183 if (ast_write(chan, &outf)) {
184 ast_log(LOG_WARNING, "Failed to carefully write frame\n");
187 /* Update pointers and lengths */
196 static int __adsi_transmit_messages(struct ast_channel *chan, unsigned char **msg, int *msglen, int *msgtype)
198 /* msglen must be no more than 256 bits, each */
199 unsigned char buf[24000 * 5];
207 /* Wait up to 500 ms for initial ACK */
213 if (chan->adsicpe == AST_ADSI_UNAVAILABLE) {
214 /* Don't bother if we know they don't support ADSI */
219 while(retries < maxretries) {
220 if (!(chan->adsicpe & ADSI_FLAG_DATAMODE)) {
221 /* Generate CAS (no SAS) */
222 ast_gen_cas(buf, 0, 680, AST_FORMAT_ULAW);
225 if (adsi_careful_send(chan, buf, 680, NULL)) {
226 ast_log(LOG_WARNING, "Unable to send CAS\n");
228 /* Wait For DTMF result */
231 if (((res = ast_waitfor(chan, waittime)) < 1)) {
232 /* Didn't get back DTMF A in time */
233 ast_log(LOG_DEBUG, "No ADSI CPE detected (%d)\n", res);
235 chan->adsicpe = AST_ADSI_UNAVAILABLE;
242 ast_log(LOG_DEBUG, "Hangup in ADSI\n");
245 if (f->frametype == AST_FRAME_DTMF) {
246 if (f->subclass == 'A') {
247 /* Okay, this is an ADSI CPE. Note this for future reference, too */
249 chan->adsicpe = AST_ADSI_AVAILABLE;
252 if (f->subclass == 'D') {
253 ast_log(LOG_DEBUG, "Off-hook capable CPE only, not ADSI\n");
255 ast_log(LOG_WARNING, "Unknown ADSI response '%c'\n", f->subclass);
257 chan->adsicpe = AST_ADSI_UNAVAILABLE;
265 ast_log(LOG_DEBUG, "ADSI Compatible CPE Detected\n");
267 ast_log(LOG_DEBUG, "Already in data mode\n");
272 def= ast_channel_defer_dtmf(chan);
274 while((x < 6) && msg[x]) {
275 res = adsi_generate(buf + pos, msgtype[x], msg[x], msglen[x], x+1 - start, (x == 5) || !msg[x+1], AST_FORMAT_ULAW);
277 ast_log(LOG_WARNING, "Failed to generate ADSI message %d on channel %s\n", x + 1, chan->name);
280 ast_log(LOG_DEBUG, "Message %d, of %d input bytes, %d output bytes\n",
281 x + 1, msglen[x], res);
288 res = adsi_careful_send(chan, buf, pos, &rem);
290 ast_channel_undefer_dtmf(chan);
294 ast_log(LOG_DEBUG, "Sent total spill of %d bytes\n", pos);
296 memset(ack, 0, sizeof(ack));
297 /* Get real result */
298 res = ast_readstring(chan, ack, 2, 1000, 1000, "");
299 /* Check for hangup */
303 ast_log(LOG_DEBUG, "Acked up to message %d\n", atoi(ack + 1));
304 start += atoi(ack + 1);
309 ast_log(LOG_DEBUG, "Retransmitting (%d), from %d\n", retries, start + 1);
313 ast_log(LOG_WARNING, "Unexpected response to ack: %s (retry %d)\n", ack, retries);
316 if (retries >= maxretries) {
317 ast_log(LOG_WARNING, "Maximum ADSI Retries (%d) exceeded\n", maxretries);
325 int adsi_begin_download(struct ast_channel *chan, char *service, unsigned char *fdn, unsigned char *sec, int version)
328 unsigned char buf[256];
331 /* Setup the resident soft key stuff, a piece at a time */
332 /* Upload what scripts we can for voicemail ahead of time */
333 bytes += adsi_download_connect(buf + bytes, service, fdn, sec, version);
334 if (adsi_transmit_message_full(chan, buf, bytes, ADSI_MSG_DOWNLOAD, 0))
336 if (ast_readstring(chan, ack, 1, 10000, 10000, ""))
340 ast_log(LOG_DEBUG, "Download was denied by CPE\n");
344 int adsi_end_download(struct ast_channel *chan)
347 unsigned char buf[256];
349 /* Setup the resident soft key stuff, a piece at a time */
350 /* Upload what scripts we can for voicemail ahead of time */
351 bytes += adsi_download_disconnect(buf + bytes);
352 if (adsi_transmit_message_full(chan, buf, bytes, ADSI_MSG_DOWNLOAD, 0))
357 int adsi_transmit_message_full(struct ast_channel *chan, unsigned char *msg, int msglen, int msgtype, int dowait)
359 unsigned char *msgs[5] = { NULL, NULL, NULL, NULL, NULL };
365 int writeformat, readformat;
366 int waitforswitch = 0;
368 writeformat = chan->writeformat;
369 readformat = chan->readformat;
371 newdatamode = chan->adsicpe & ADSI_FLAG_DATAMODE;
373 for (x=0;x<msglen;x+=(msg[x+1]+2)) {
374 if (msg[x] == ADSI_SWITCH_TO_DATA) {
375 ast_log(LOG_DEBUG, "Switch to data is sent!\n");
377 newdatamode = ADSI_FLAG_DATAMODE;
380 if (msg[x] == ADSI_SWITCH_TO_VOICE) {
381 ast_log(LOG_DEBUG, "Switch to voice is sent!\n");
389 msgtypes[0] = msgtype;
392 ast_log(LOG_WARNING, "Can't send ADSI message of %d bytes, too large\n", msglen);
396 ast_stopstream(chan);
398 if (ast_set_write_format(chan, AST_FORMAT_ULAW)) {
399 ast_log(LOG_WARNING, "Unable to set write format to ULAW\n");
403 if (ast_set_read_format(chan, AST_FORMAT_ULAW)) {
404 ast_log(LOG_WARNING, "Unable to set read format to ULAW\n");
406 if (ast_set_write_format(chan, writeformat))
407 ast_log(LOG_WARNING, "Unable to restore write format to %d\n", writeformat);
411 res = __adsi_transmit_messages(chan, msgs, msglens, msgtypes);
414 ast_log(LOG_DEBUG, "Wait for switch is '%d'\n", waitforswitch);
415 while(waitforswitch-- && ((res = ast_waitfordigit(chan, 1000)) > 0)) { res = 0; ast_log(LOG_DEBUG, "Waiting for 'B'...\n"); }
419 chan->adsicpe = (chan->adsicpe & ~ADSI_FLAG_DATAMODE) | newdatamode;
422 ast_set_write_format(chan, writeformat);
424 ast_set_read_format(chan, readformat);
427 res = ast_safe_sleep(chan, 100 );
431 int adsi_transmit_message(struct ast_channel *chan, unsigned char *msg, int msglen, int msgtype)
433 return adsi_transmit_message_full(chan, msg, msglen, msgtype, 1);
436 static inline int ccopy(unsigned char *dst, const unsigned char *src, int max)
439 /* Carefully copy the requested data */
440 while ((x < max) && src[x] && (src[x] != 0xff)) {
447 int adsi_load_soft_key(unsigned char *buf, int key, const char *llabel, const char *slabel, const char *ret, int data)
451 /* Abort if invalid key specified */
452 if ((key < 2) || (key > 33))
454 buf[bytes++] = ADSI_LOAD_SOFTKEY;
455 /* Reserve for length */
460 /* Carefully copy long label */
461 bytes += ccopy(buf + bytes, (const unsigned char *)llabel, 18);
463 /* Place delimiter */
467 bytes += ccopy(buf + bytes, (const unsigned char *)slabel, 7);
470 /* If specified, copy return string */
472 /* Place delimiter */
475 buf[bytes++] = ADSI_SWITCH_TO_DATA2;
476 /* Carefully copy return string */
477 bytes += ccopy(buf + bytes, (const unsigned char *)ret, 20);
480 /* Replace parameter length */
486 int adsi_connect_session(unsigned char *buf, unsigned char *fdn, int ver)
492 buf[bytes++] = ADSI_CONNECT_SESSION;
494 /* Reserve space for length */
499 buf[bytes++] = fdn[x];
501 buf[bytes++] = ver & 0xff;
509 int adsi_download_connect(unsigned char *buf, char *service, unsigned char *fdn, unsigned char *sec, int ver)
515 buf[bytes++] = ADSI_DOWNLOAD_CONNECT;
517 /* Reserve space for length */
521 bytes+= ccopy(buf + bytes, (unsigned char *)service, 18);
527 buf[bytes++] = fdn[x];
530 buf[bytes++] = sec[x];
531 buf[bytes++] = ver & 0xff;
539 int adsi_disconnect_session(unsigned char *buf)
544 buf[bytes++] = ADSI_DISC_SESSION;
546 /* Reserve space for length */
554 int adsi_query_cpeid(unsigned char *buf)
557 buf[bytes++] = ADSI_QUERY_CPEID;
558 /* Reserve space for length */
564 int adsi_query_cpeinfo(unsigned char *buf)
567 buf[bytes++] = ADSI_QUERY_CONFIG;
568 /* Reserve space for length */
574 int adsi_read_encoded_dtmf(struct ast_channel *chan, unsigned char *buf, int maxlen)
578 unsigned char current = 0;
581 memset(buf, 0, sizeof(buf));
582 while(bytes <= maxlen) {
583 /* Wait up to a second for a digit */
584 res = ast_waitfordigit(chan, 1000);
591 /* Ignore anything other than a digit */
592 if ((res < '0') || (res > '9'))
599 buf[bytes++] = (res << 4) | current;
609 int adsi_get_cpeid(struct ast_channel *chan, unsigned char *cpeid, int voice)
611 unsigned char buf[256];
614 bytes += adsi_data_mode(buf);
615 adsi_transmit_message_full(chan, buf, bytes, ADSI_MSG_DISPLAY, 0);
618 bytes += adsi_query_cpeid(buf);
619 adsi_transmit_message_full(chan, buf, bytes, ADSI_MSG_DISPLAY, 0);
622 memset(buf, 0, sizeof(buf));
623 res = adsi_read_encoded_dtmf(chan, cpeid, 4);
625 ast_log(LOG_WARNING, "Got %d bytes back of encoded DTMF, expecting 4\n", res);
633 bytes += adsi_voice_mode(buf, 0);
634 adsi_transmit_message_full(chan, buf, bytes, ADSI_MSG_DISPLAY, 0);
635 /* Ignore the resulting DTMF B announcing it's in voice mode */
636 ast_waitfordigit(chan, 1000);
641 int adsi_get_cpeinfo(struct ast_channel *chan, int *width, int *height, int *buttons, int voice)
643 unsigned char buf[256];
646 bytes += adsi_data_mode(buf);
647 adsi_transmit_message_full(chan, buf, bytes, ADSI_MSG_DISPLAY, 0);
650 bytes += adsi_query_cpeinfo(buf);
651 adsi_transmit_message_full(chan, buf, bytes, ADSI_MSG_DISPLAY, 0);
654 memset(buf, 0, sizeof(buf));
655 res = ast_readstring(chan, (char *)buf, 2, 1000, 500, "");
658 if (strlen((char *)buf) != 2) {
659 ast_log(LOG_WARNING, "Got %d bytes of width, expecting 2\n", res);
665 *width = atoi((char *)buf);
667 memset(buf, 0, sizeof(buf));
669 res = ast_readstring(chan, (char *)buf, 2, 1000, 500, "");
672 if (strlen((char *)buf) != 2) {
673 ast_log(LOG_WARNING, "Got %d bytes of height, expecting 2\n", res);
679 *height= atoi((char *)buf);
682 memset(buf, 0, sizeof(buf));
684 res = ast_readstring(chan, (char *)buf, 1, 1000, 500, "");
687 if (strlen((char *)buf) != 1) {
688 ast_log(LOG_WARNING, "Got %d bytes of buttons, expecting 1\n", res);
694 *buttons = atoi((char *)buf);
698 bytes += adsi_voice_mode(buf, 0);
699 adsi_transmit_message_full(chan, buf, bytes, ADSI_MSG_DISPLAY, 0);
700 /* Ignore the resulting DTMF B announcing it's in voice mode */
701 ast_waitfordigit(chan, 1000);
706 int adsi_data_mode(unsigned char *buf)
711 buf[bytes++] = ADSI_SWITCH_TO_DATA;
713 /* Reserve space for length */
721 int adsi_clear_soft_keys(unsigned char *buf)
726 buf[bytes++] = ADSI_CLEAR_SOFTKEY;
728 /* Reserve space for length */
736 int adsi_clear_screen(unsigned char *buf)
741 buf[bytes++] = ADSI_CLEAR_SCREEN;
743 /* Reserve space for length */
751 int adsi_voice_mode(unsigned char *buf, int when)
756 buf[bytes++] = ADSI_SWITCH_TO_VOICE;
758 /* Reserve space for length */
761 buf[bytes++] = when & 0x7f;
768 int adsi_available(struct ast_channel *chan)
770 int cpe = chan->adsicpe & 0xff;
771 if ((cpe == AST_ADSI_AVAILABLE) ||
772 (cpe == AST_ADSI_UNKNOWN))
777 int adsi_download_disconnect(unsigned char *buf)
782 buf[bytes++] = ADSI_DOWNLOAD_DISC;
784 /* Reserve space for length */
792 int adsi_display(unsigned char *buf, int page, int line, int just, int wrap,
793 char *col1, char *col2)
797 /* Sanity check line number */
800 if (line > 4) return -1;
802 if (line > 33) return -1;
808 buf[bytes++] = ADSI_LOAD_VIRTUAL_DISP;
810 /* Reserve space for size */
813 /* Page and wrap indicator */
814 buf[bytes++] = ((page & 0x1) << 7) | ((wrap & 0x1) << 6) | (line & 0x3f);
817 buf[bytes++] = (just & 0x3) << 5;
819 /* Omit highlight mode definition */
823 bytes+= ccopy(buf + bytes, (unsigned char *)col1, 20);
828 /* Secondary column */
829 bytes += ccopy(buf + bytes, (unsigned char *)col2, 20);
838 int adsi_input_control(unsigned char *buf, int page, int line, int display, int format, int just)
843 if (line > 4) return -1;
845 if (line > 33) return -1;
851 buf[bytes++] = ADSI_INPUT_CONTROL;
853 buf[bytes++] = ((page & 1) << 7) | (line & 0x3f);
854 buf[bytes++] = ((display & 1) << 7) | ((just & 0x3) << 4) | (format & 0x7);
861 int adsi_input_format(unsigned char *buf, int num, int dir, int wrap, char *format1, char *format2)
865 if (!strlen((char *)format1))
868 buf[bytes++] = ADSI_INPUT_FORMAT;
870 buf[bytes++] = ((dir & 1) << 7) | ((wrap & 1) << 6) | (num & 0x7);
871 bytes += ccopy(buf + bytes, (unsigned char *)format1, 20);
873 if (format2 && strlen((char *)format2)) {
874 bytes += ccopy(buf + bytes, (unsigned char *)format2, 20);
880 int adsi_set_keys(unsigned char *buf, unsigned char *keys)
885 buf[bytes++] = ADSI_INIT_SOFTKEY_LINE;
888 /* Key definitions */
890 buf[bytes++] = (keys[x] & 0x3f) ? keys[x] : (keys[x] | 0x1);
895 int adsi_set_line(unsigned char *buf, int page, int line)
899 /* Sanity check line number */
902 if (line > 4) return -1;
904 if (line > 33) return -1;
910 buf[bytes++] = ADSI_LINE_CONTROL;
912 /* Reserve space for size */
916 buf[bytes++] = ((page & 0x1) << 7) | (line & 0x3f);
923 static int total = 0;
924 static int speeds = 0;
926 int adsi_channel_restore(struct ast_channel *chan)
928 unsigned char dsp[256];
931 unsigned char keyd[6];
933 memset(dsp, 0, sizeof(dsp));
935 /* Start with initial display setup */
937 bytes += adsi_set_line(dsp + bytes, ADSI_INFO_PAGE, 1);
939 /* Prepare key setup messages */
942 memset(keyd, 0, sizeof(keyd));
943 for (x=0;x<speeds;x++) {
944 keyd[x] = ADSI_SPEED_DIAL + x;
946 bytes += adsi_set_keys(dsp + bytes, keyd);
948 adsi_transmit_message_full(chan, dsp, bytes, ADSI_MSG_DISPLAY, 0);
953 int adsi_print(struct ast_channel *chan, char **lines, int *aligns, int voice)
955 unsigned char buf[4096];
959 for(x=0;lines[x];x++)
960 bytes += adsi_display(buf + bytes, ADSI_INFO_PAGE, x+1, aligns[x], 0, lines[x], "");
961 bytes += adsi_set_line(buf + bytes, ADSI_INFO_PAGE, 1);
963 bytes += adsi_voice_mode(buf + bytes, 0);
965 res = adsi_transmit_message_full(chan, buf, bytes, ADSI_MSG_DISPLAY, 0);
967 /* Ignore the resulting DTMF B announcing it's in voice mode */
968 ast_waitfordigit(chan, 1000);
973 int adsi_load_session(struct ast_channel *chan, unsigned char *app, int ver, int data)
975 unsigned char dsp[256];
980 memset(dsp, 0, sizeof(dsp));
982 /* Connect to session */
984 bytes += adsi_connect_session(dsp + bytes, app, ver);
987 bytes += adsi_data_mode(dsp + bytes);
989 /* Prepare key setup messages */
990 if (adsi_transmit_message_full(chan, dsp, bytes, ADSI_MSG_DISPLAY, 0))
993 res = ast_readstring(chan, resp, 1, 1200, 1200, "");
997 ast_log(LOG_DEBUG, "No response from CPE about version. Assuming not there.\n");
1000 if (!strcmp(resp, "B")) {
1001 ast_log(LOG_DEBUG, "CPE has script '%s' version %d already loaded\n", app, ver);
1003 } else if (!strcmp(resp, "A")) {
1004 ast_log(LOG_DEBUG, "CPE hasn't script '%s' version %d already loaded\n", app, ver);
1006 ast_log(LOG_WARNING, "Unexpected CPE response to script query: %s\n", resp);
1014 int adsi_unload_session(struct ast_channel *chan)
1016 unsigned char dsp[256];
1019 memset(dsp, 0, sizeof(dsp));
1021 /* Connect to session */
1023 bytes += adsi_disconnect_session(dsp + bytes);
1024 bytes += adsi_voice_mode(dsp + bytes, 0);
1026 /* Prepare key setup messages */
1027 if (adsi_transmit_message_full(chan, dsp, bytes, ADSI_MSG_DISPLAY, 0))
1032 static int str2align(char *s)
1034 if (!strncasecmp(s, "l", 1))
1035 return ADSI_JUST_LEFT;
1036 else if (!strncasecmp(s, "r", 1))
1037 return ADSI_JUST_RIGHT;
1038 else if (!strncasecmp(s, "i", 1))
1039 return ADSI_JUST_IND;
1041 return ADSI_JUST_CENT;
1044 static void init_state(void)
1048 for (x=0;x<ADSI_MAX_INTRO;x++)
1049 aligns[x] = ADSI_JUST_CENT;
1050 ast_copy_string(intro[0], "Welcome to the", sizeof(intro[0]));
1051 ast_copy_string(intro[1], "Asterisk", sizeof(intro[1]));
1052 ast_copy_string(intro[2], "Open Source PBX", sizeof(intro[2]));
1055 for (x=3;x<ADSI_MAX_INTRO;x++)
1057 memset(speeddial, 0, sizeof(speeddial));
1058 alignment = ADSI_JUST_CENT;
1061 static void adsi_load(void)
1064 struct ast_config *conf;
1065 struct ast_variable *v;
1068 conf = ast_config_load("adsi.conf");
1071 for (v = ast_variable_browse(conf, "intro"); v; v = v->next) {
1072 if (!strcasecmp(v->name, "alignment"))
1073 alignment = str2align(v->value);
1074 else if (!strcasecmp(v->name, "greeting")) {
1075 if (x < ADSI_MAX_INTRO) {
1076 aligns[x] = alignment;
1077 ast_copy_string(intro[x], v->value, sizeof(intro[x]));
1080 } else if (!strcasecmp(v->name, "maxretries")) {
1081 if (atoi(v->value) > 0)
1082 maxretries = atoi(v->value);
1088 for (v = ast_variable_browse(conf, "speeddial"); v; v = v->next) {
1089 char *stringp = v->value;
1090 name = strsep(&stringp, ",");
1091 sname = strsep(&stringp, ",");
1094 if (x < ADSI_MAX_SPEED_DIAL) {
1095 /* Up to 20 digits */
1096 ast_copy_string(speeddial[x][0], v->name, sizeof(speeddial[x][0]));
1097 strncpy(speeddial[x][1], name, 18);
1098 strncpy(speeddial[x][2], sname, 7);
1104 ast_config_destroy(conf);
1108 static int reload(void)
1114 static int load_module(void)
1120 static int unload_module(void)
1122 /* Can't unload this once we're loaded */
1126 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_GLOBAL_SYMBOLS, "ADSI Resource",
1127 .load = load_module,
1128 .unload = unload_module,