lib/ZRetSubs.c

   1 /* This file is part of the Project Athena Zephyr Notification System.
   2  * It contains source for the ZRetrieveSubscriptions and
   3  * ZRetrieveDefaultSubscriptions functions.
   4  *
   5  *      Created by:     Robert French
   6  *
   7  *      $Id: ZRetSubs.c,v 1.26 1999/01/22 23:19:23 ghudson Exp $
   8  *
   9  *      Copyright (c) 1987,1988,1991 by the Massachusetts Institute of Technology.
  10  *      For copying and distribution information, see the file
  11  *      "mit-copyright.h".
  12  */
  13
  14 #include <internal.h>
  15
  16 #ifndef lint
  17 static const char rcsid_ZRetrieveSubscriptions_c[] =
  18     "$Id: ZRetSubs.c,v 1.26 1999/01/22 23:19:23 ghudson Exp $";
  19 #endif
  20
  21 static Code_t Z_RetSubs ();
  22
  23 /* Need STDC definition when possible for unsigned short argument. */
  24 #ifdef __STDC__
  25 Code_t ZRetrieveSubscriptions(unsigned short port, int *nsubs)
  26 #else
  27 Code_t ZRetrieveSubscriptions(port,nsubs)
  28         unsigned short port;
  29         int *nsubs;
  30 #endif
  31 {
  32         int retval;
  33         ZNotice_t notice;
  34         char asciiport[50];
  35
  36         if (!port)                      /* use default port */
  37             port = __Zephyr_port;
  38
  39         retval = ZMakeAscii16(asciiport, sizeof(asciiport), ntohs(port));
  40         if (retval != ZERR_NONE)
  41                 return (retval);
  42
  43         (void) memset((char *)&notice, 0, sizeof(notice));
  44         notice.z_message = asciiport;
  45         notice.z_message_len = strlen(asciiport)+1;
  46         notice.z_opcode = CLIENT_GIMMESUBS;
  47
  48         return(Z_RetSubs(&notice, nsubs, ZAUTH));
  49 }
  50
  51 Code_t ZRetrieveDefaultSubscriptions(nsubs)
  52         int *nsubs;
  53 {
  54         ZNotice_t notice;
  55
  56         (void) memset((char *)&notice, 0, sizeof(notice));
  57         notice.z_message = (char *) 0;
  58         notice.z_message_len = 0;
  59         notice.z_opcode = CLIENT_GIMMEDEFS;
  60
  61         return(Z_RetSubs(&notice, nsubs, ZNOAUTH));
  62
  63 }
  64
  65 static Code_t Z_RetSubs(notice, nsubs, auth_routine)
  66         register ZNotice_t *notice;
  67         int *nsubs;
  68         Z_AuthProc auth_routine;
  69 {
  70         register int i;
  71         int retval,nrecv,gimmeack;
  72         ZNotice_t retnotice;
  73         char *ptr,*end,*ptr2;
  74         ZSubscription_t *list = __subscriptions_list;
  75
  76         retval = ZFlushSubscriptions();
  77
  78         if (retval != ZERR_NONE && retval != ZERR_NOSUBSCRIPTIONS)
  79                 return (retval);
  80
  81         if (ZGetFD() < 0)
  82                 if ((retval = ZOpenPort((u_short *)0)) != ZERR_NONE)
  83                         return (retval);
  84
  85         notice->z_kind = ACKED;
  86         notice->z_port = __Zephyr_port;
  87         notice->z_class = ZEPHYR_CTL_CLASS;
  88         notice->z_class_inst = ZEPHYR_CTL_CLIENT;
  89         notice->z_sender = 0;
  90         notice->z_recipient = "";
  91         notice->z_default_format = "";
  92
  93         if ((retval = ZSendNotice(notice,auth_routine)) != ZERR_NONE)
  94                 return (retval);
  95
  96         nrecv = 0;
  97         gimmeack = 0;
  98         list = (ZSubscription_t *) 0;
  99
 100         while (!nrecv || !gimmeack) {
 101                 retval = Z_WaitForNotice (&retnotice, ZCompareMultiUIDPred,
 102                                           &notice->z_multiuid, SRV_TIMEOUT);
 103                 if (retval == ZERR_NONOTICE)
 104                   return ETIMEDOUT;
 105                 else if (retval != ZERR_NONE)
 106                   return retval;
 107
 108                 if (retnotice.z_kind == SERVNAK) {
 109                         ZFreeNotice(&retnotice);
 110                         return (ZERR_SERVNAK);
 111                 }
 112                 /* non-matching protocol version numbers means the
 113                    server is probably an older version--must punt */
 114                 if (strcmp(notice->z_version,retnotice.z_version)) {
 115                         ZFreeNotice(&retnotice);
 116                         return(ZERR_VERS);
 117                 }
 118                 if (retnotice.z_kind == SERVACK &&
 119                     !strcmp(retnotice.z_opcode,notice->z_opcode)) {
 120                         ZFreeNotice(&retnotice);
 121                         gimmeack = 1;
 122                         continue;
 123                 }
 124
 125                 if (retnotice.z_kind != ACKED) {
 126                         ZFreeNotice(&retnotice);
 127                         return (ZERR_INTERNAL);
 128                 }
 129
 130                 nrecv++;
 131
 132                 end = retnotice.z_message+retnotice.z_message_len;
 133
 134                 __subscriptions_num = 0;
 135                 for (ptr=retnotice.z_message;ptr<end;ptr++)
 136                         if (!*ptr)
 137                                 __subscriptions_num++;
 138
 139                 __subscriptions_num = __subscriptions_num / 3;
 140
 141                 list = (ZSubscription_t *)
 142                     malloc(__subscriptions_num * sizeof(ZSubscription_t));
 143                 if (__subscriptions_num && !list) {
 144                         ZFreeNotice(&retnotice);
 145                         return (ENOMEM);
 146                 }
 147
 148                 ptr = retnotice.z_message;
 149                 for (i = 0; i < __subscriptions_num; i++) {
 150                         list[i].zsub_class = (char *)
 151                             malloc(strlen(ptr) + 1);
 152                         if (!list[i].zsub_class) {
 153                                 ZFreeNotice(&retnotice);
 154                                 return (ENOMEM);
 155                         }
 156                         strcpy(list[i].zsub_class, ptr);
 157                         ptr += strlen(ptr)+1;
 158                         list[i].zsub_classinst = (char *)
 159                             malloc(strlen(ptr) + 1);
 160                         if (!list[i].zsub_classinst) {
 161                                 ZFreeNotice(&retnotice);
 162                                 return (ENOMEM);
 163                         }
 164                         strcpy(list[i].zsub_classinst, ptr);
 165                         ptr += strlen(ptr)+1;
 166                         ptr2 = ptr;
 167                         list[i].zsub_recipient = (char *)
 168                             malloc(strlen(ptr2) + 2);
 169                         if (!list[i].zsub_recipient) {
 170                                 ZFreeNotice(&retnotice);
 171                                 return (ENOMEM);
 172                         }
 173                         if (*ptr2 == '@' || *ptr2 == 0) {
 174                                 *list[i].zsub_recipient = '*';
 175                                 strcpy(list[i].zsub_recipient + 1, ptr2);
 176                         } else {
 177                                 strcpy(list[i].zsub_recipient, ptr2);
 178                         }
 179                         ptr += strlen(ptr)+1;
 180                 }
 181                 ZFreeNotice(&retnotice);
 182         }
 183
 184         __subscriptions_list = list;
 185         __subscriptions_next = 0;
 186         *nsubs = __subscriptions_num;
 187
 188         return (ZERR_NONE);
 189 }