citadel/modules/pop3client/serv_pop3client.c

   1 /*
   2  * Consolidate mail from remote POP3 accounts.
   3  *
   4  * Copyright (c) 2007-2017 by the citadel.org team
   5  *
   6  * This program is open source software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as published
   8  * by the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <stdlib.h>
  18 #include <unistd.h>
  19 #include <stdio.h>
  20 #include <sysconfig.h>
  21
  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 <ctype.h>
  34 #include <string.h>
  35 #include <errno.h>
  36 #include <sys/types.h>
  37 #include <sys/stat.h>
  38 #include <libcitadel.h>
  39 #include <curl/curl.h>
  40 #include "citadel.h"
  41 #include "server.h"
  42 #include "citserver.h"
  43 #include "support.h"
  44 #include "config.h"
  45 #include "ctdl_module.h"
  46 #include "clientsocket.h"
  47 #include "msgbase.h"
  48 #include "internet_addressing.h"
  49 #include "database.h"
  50 #include "citadel_dirs.h"
  51
  52
  53 struct CitContext pop3_client_CC;
  54 static int doing_pop3client = 0;
  55
  56
  57 //      This is how we form a USETABLE record for pop3 client
  58 //
  59 //      StrBufPrintf(RecvMsg->CurrMsg->MsgUID,
  60 //                   "pop3/%s/%s:%s@%s",
  61 //                   ChrPtr(RecvMsg->RoomName),
  62 //                   ChrPtr(RecvMsg->CurrMsg->MsgUIDL),
  63 //                   RecvMsg->IO.ConnectMe->User,
  64 //                   RecvMsg->IO.ConnectMe->Host
  65 //      );
  66
  67
  68 /*
  69  * Process one mailbox.
  70  */
  71 void pop3client_one_mailbox(struct ctdlroom *qrbuf, const char *host, const char *user, const char *pass, int keep, long interval)
  72 {
  73         syslog(LOG_DEBUG, "\033[33mpop3client: room=<%s> host=<%s> user=<%s> pass=<%s> keep=<%d> interval=<%ld>\033[0m",
  74                 qrbuf->QRname, host, user, pass, keep, interval
  75         );
  76
  77         char url[SIZ];
  78         CURL *curl;
  79         CURLcode res = CURLE_OK;
  80         int is_pop3s = 0;
  81
  82         curl = curl_easy_init();
  83         if (!curl) {
  84                 return;
  85         }
  86
  87         curl_easy_setopt(curl, CURLOPT_USERNAME, user);
  88         curl_easy_setopt(curl, CURLOPT_PASSWORD, pass);
  89         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
  90         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
  91         curl_easy_setopt(curl, CURLOPT_TIMEOUT, 15);
  92         curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "UIDL");
  93
  94         /* Try POP3S (SSL encrypted) first */
  95         snprintf(url, sizeof url, "pop3s://%s", host);
  96         curl_easy_setopt(curl, CURLOPT_URL, url);
  97         res = curl_easy_perform(curl);
  98         if (res == CURLE_OK) {
  99                 is_pop3s = 1;
 100         } else {
 101                 syslog(LOG_DEBUG, "POP3S client failed: %s , trying POP3 next", curl_easy_strerror(res));
 102                 snprintf(url, sizeof url, "pop3://%s", host);                   // try unencrypted next
 103                 curl_easy_setopt(curl, CURLOPT_URL, url);
 104                 res = curl_easy_perform(curl);
 105         }
 106
 107         if (res != CURLE_OK) {
 108                 syslog(LOG_DEBUG, "pop3 client failed: %s", curl_easy_strerror(res));
 109                 curl_easy_cleanup(curl);
 110                 return;
 111         }
 112
 113         // FIXME finish this
 114
 115         curl_easy_cleanup(curl);
 116         return;
 117 }
 118
 119
 120 /*
 121  * Scan a room's netconfig to determine whether it requires POP3 aggregation
 122  */
 123 void pop3client_scan_room(struct ctdlroom *qrbuf, void *data, OneRoomNetCfg *OneRNCFG)
 124 {
 125         const RoomNetCfgLine *pLine;
 126
 127         if (server_shutting_down) return;
 128
 129         pLine = OneRNCFG->NetConfigs[pop3client];
 130
 131         while (pLine != NULL)
 132         {
 133                 pop3client_one_mailbox(qrbuf,
 134                         ChrPtr(pLine->Value[0]),
 135                         ChrPtr(pLine->Value[1]),
 136                         ChrPtr(pLine->Value[2]),
 137                         atoi(ChrPtr(pLine->Value[3])),
 138                         atol(ChrPtr(pLine->Value[4]))
 139                 );
 140                 pLine = pLine->next;
 141
 142         }
 143 }
 144
 145
 146 void pop3client_scan(void) {
 147         static time_t last_run = 0L;
 148         time_t fastest_scan;
 149
 150         become_session(&pop3_client_CC);
 151
 152         if (CtdlGetConfigLong("c_pop3_fastest") < CtdlGetConfigLong("c_pop3_fetch")) {
 153                 fastest_scan = CtdlGetConfigLong("c_pop3_fastest");
 154         }
 155         else {
 156                 fastest_scan = CtdlGetConfigLong("c_pop3_fetch");
 157         }
 158
 159         /*
 160          * Run POP3 aggregation no more frequently than once every n seconds
 161          */
 162         if ( (time(NULL) - last_run) < fastest_scan ) {
 163                 return;
 164         }
 165
 166         /*
 167          * This is a simple concurrency check to make sure only one pop3client
 168          * run is done at a time.  We could do this with a mutex, but since we
 169          * don't really require extremely fine granularity here, we'll do it
 170          * with a static variable instead.
 171          */
 172         if (doing_pop3client) return;
 173         doing_pop3client = 1;
 174
 175         syslog(LOG_DEBUG, "pop3client started");
 176         CtdlForEachNetCfgRoom(pop3client_scan_room, NULL);
 177         syslog(LOG_DEBUG, "pop3client ended");
 178         last_run = time(NULL);
 179         doing_pop3client = 0;
 180 }
 181
 182
 183 CTDL_MODULE_INIT(pop3client)
 184 {
 185         if (!threading)
 186         {
 187                 CtdlFillSystemContext(&pop3_client_CC, "POP3aggr");
 188                 CtdlREGISTERRoomCfgType(pop3client, ParseGeneric, 0, 5, SerializeGeneric, DeleteGenericCfgLine);
 189                 CtdlRegisterSessionHook(pop3client_scan, EVT_TIMER, PRIO_AGGR + 50);
 190         }
 191
 192         /* return our module id for the log */
 193         return "pop3client";
 194 }