citadel/serv_listsub.c

   1 /*
   2  * $Id$
   3  *
   4  * This module handles self-service subscription/unsubscription to mail lists.
   5  *
   6  * Copyright (C) 2002 by Art Cancro and others.
   7  * This code is released under the terms of the GNU General Public License.
   8  *
   9  */
  10
  11 #include "sysdep.h"
  12 #include <stdlib.h>
  13 #include <unistd.h>
  14 #include <stdio.h>
  15 #include <fcntl.h>
  16 #include <ctype.h>
  17 #include <signal.h>
  18 #include <pwd.h>
  19 #include <errno.h>
  20 #include <sys/types.h>
  21 #include <dirent.h>
  22 #if TIME_WITH_SYS_TIME
  23 # include <sys/time.h>
  24 # include <time.h>
  25 #else
  26 # if HAVE_SYS_TIME_H
  27 #  include <sys/time.h>
  28 # else
  29 #  include <time.h>
  30 # endif
  31 #endif
  32
  33 #include <sys/wait.h>
  34 #include <string.h>
  35 #include <limits.h>
  36 #include "citadel.h"
  37 #include "server.h"
  38 #include "sysdep_decls.h"
  39 #include "citserver.h"
  40 #include "support.h"
  41 #include "config.h"
  42 #include "dynloader.h"
  43 #include "room_ops.h"
  44 #include "user_ops.h"
  45 #include "policy.h"
  46 #include "database.h"
  47 #include "msgbase.h"
  48 #include "tools.h"
  49 #include "internet_addressing.h"
  50 #include "serv_network.h"
  51 #include "clientsocket.h"
  52 #include "file_ops.h"
  53
  54 #ifndef HAVE_SNPRINTF
  55 #include "snprintf.h"
  56 #endif
  57
  58
  59 /*
  60  * Generate a randomizationalisticized token to use for authentication of
  61  * a subscribe or unsubscribe request.
  62  */
  63 void listsub_generate_token(char *buf) {
  64         char sourcebuf[SIZ];
  65         static int seq = 0;
  66
  67         /* Theo, please sit down and shut up.  This key doesn't have to be
  68          * tinfoil-hat secure, it just needs to be reasonably unguessable
  69          * and unique.
  70          */
  71         sprintf(sourcebuf, "%d%d%ld",
  72                 ++seq,
  73                 getpid(),
  74                 time(NULL)
  75         );
  76
  77         /* Convert it to base64 so it looks cool */
  78         encode_base64(buf, sourcebuf);
  79 }
  80
  81
  82 /*
  83  * Enter a subscription request
  84  */
  85 void do_subscribe(char *room, char *email, char *subtype) {
  86         struct quickroom qrbuf;
  87         FILE *ncfp;
  88         char filename[SIZ];
  89         char token[SIZ];
  90         char confirmation_request[SIZ];
  91
  92         if (getroom(&qrbuf, room) != 0) {
  93                 cprintf("%d There is no list called '%s'\n", ERROR, room);
  94                 return;
  95         }
  96
  97         listsub_generate_token(token);
  98
  99         begin_critical_section(S_NETCONFIGS);
 100         assoc_file_name(filename, sizeof filename, &qrbuf, "netconfigs");
 101         ncfp = fopen(filename, "a");
 102         if (ncfp != NULL) {
 103                 fprintf(ncfp, "subpending|%s|%s|%s|%ld\n",
 104                         email,
 105                         subtype,
 106                         token,
 107                         time(NULL)
 108                 );
 109                 fclose(ncfp);
 110         }
 111         end_critical_section(S_NETCONFIGS);
 112
 113         /* Generate and send the confirmation request */
 114
 115         snprintf(confirmation_request, sizeof confirmation_request,
 116                 "Someone (probably you) has submitted a request to subscribe\n"
 117                 "<%s> to the '%s' mailing list.\n\n"
 118                 "In order to confirm this subscription request, please\n"
 119                 "point your web browser at the following location:\n\n"
 120                 "http://FIXME.com:FIXME/blah?room=%s&token=%s\n\n"
 121                 "If this request has been submitted in error and you do not\n"
 122                 "wish to receive the '%s' mailing list, simply do nothing,\n"
 123                 "and you will not receive any further mailings.\n",
 124
 125                 email, qrbuf.QRname, qrbuf.QRname, token, qrbuf.QRname
 126         );
 127
 128         quickie_message(
 129                 "Citadel",
 130                 email,
 131                 qrbuf.QRname,
 132                 confirmation_request
 133         );
 134
 135         cprintf("%d Subscription entered; confirmation request sent\n", CIT_OK);
 136
 137 }
 138
 139
 140 /*
 141  * Confirm a subscribe/unsubscribe request.
 142  */
 143 void do_confirm(char *room, char *token) {
 144         struct quickroom qrbuf;
 145         FILE *ncfp;
 146         char filename[SIZ];
 147         char line_token[SIZ];
 148         long line_offset;
 149         int line_length;
 150         char buf[SIZ];
 151         char cmd[SIZ];
 152         char email[SIZ];
 153         char subtype[SIZ];
 154         int success = 0;
 155
 156         if (getroom(&qrbuf, room) != 0) {
 157                 cprintf("%d There is no list called '%s'\n", ERROR, room);
 158                 return;
 159         }
 160
 161         begin_critical_section(S_NETCONFIGS);
 162         assoc_file_name(filename, sizeof filename, &qrbuf, "netconfigs");
 163         ncfp = fopen(filename, "r+");
 164         if (ncfp != NULL) {
 165                 while (line_offset = ftell(ncfp),
 166                       (fgets(buf, sizeof buf, ncfp) != NULL) ) {
 167                         buf[strlen(buf)-1] = 0;
 168                         line_length = strlen(buf);
 169                         extract(cmd, buf, 0);
 170                         if (!strcasecmp(cmd, "subpending")) {
 171                                 extract(email, buf, 1);
 172                                 extract(subtype, buf, 2);
 173                                 extract(line_token, buf, 3);
 174                                 if (!strcasecmp(token, line_token)) {
 175                                         if (!strcasecmp(subtype, "digest")) {
 176                                                 strcpy(buf, "digestrecp|");
 177                                         }
 178                                         else {
 179                                                 strcpy(buf, "listrecp|");
 180                                         }
 181                                         strcat(buf, email);
 182                                         strcat(buf, "|");
 183                                         /* SLEAZY HACK: pad the line out so
 184                                          * it's the same length as the line
 185                                          * we're replacing.
 186                                          */
 187                                         while (strlen(buf) < line_length) {
 188                                                 strcat(buf, " ");
 189                                         }
 190                                         fseek(ncfp, line_offset, SEEK_SET);
 191                                         fprintf(ncfp, "%s\n", buf);
 192                                         ++success;
 193                                 }
 194                         }
 195                 }
 196                 fclose(ncfp);
 197         }
 198         end_critical_section(S_NETCONFIGS);
 199
 200         if (success) {
 201                 cprintf("%d %d operation(s) confirmed.\n", CIT_OK, success);
 202         }
 203         else {
 204                 cprintf("%d Invalid token.\n", ERROR);
 205         }
 206
 207 }
 208
 209
 210
 211 /*
 212  * process subscribe/unsubscribe requests and confirmations
 213  */
 214 void cmd_subs(char *cmdbuf) {
 215
 216         char opr[SIZ];
 217         char room[SIZ];
 218         char email[SIZ];
 219         char subtype[SIZ];
 220         char token[SIZ];
 221
 222         extract(opr, cmdbuf, 0);
 223         if (!strcasecmp(opr, "subscribe")) {
 224                 extract(subtype, cmdbuf, 3);
 225                 if ( (strcasecmp(subtype, "list"))
 226                    && (strcasecmp(subtype, "digest")) ) {
 227                         cprintf("%d Invalid subscription type.\n", ERROR);
 228                 }
 229                 else {
 230                         extract(room, cmdbuf, 1);
 231                         extract(email, cmdbuf, 2);
 232                         do_subscribe(room, email, subtype);
 233                 }
 234         }
 235         else if (!strcasecmp(opr, "unsubscribe")) {
 236                 cprintf("%d not yet implemented\n", ERROR);
 237         }
 238         else if (!strcasecmp(opr, "confirm")) {
 239                 extract(room, cmdbuf, 1);
 240                 extract(token, cmdbuf, 2);
 241                 do_confirm(room, token);
 242         }
 243         else {
 244                 cprintf("%d Invalid command\n", ERROR);
 245         }
 246 }
 247
 248
 249 /*
 250  * Module entry point
 251  */
 252 char *Dynamic_Module_Init(void)
 253 {
 254         CtdlRegisterProtoHook(cmd_subs, "SUBS", "List subscribe/unsubscribe");
 255         return "$Id$";
 256 }