2 * Consolidate mail from remote POP3 accounts.
4 * Copyright (c) 2007-2019 by the citadel.org team
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.
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.
20 #include <sysconfig.h>
22 #if TIME_WITH_SYS_TIME
23 # include <sys/time.h>
27 # include <sys/time.h>
36 #include <sys/types.h>
38 #include <libcitadel.h>
39 #include <curl/curl.h>
42 #include "citserver.h"
45 #include "ctdl_module.h"
46 #include "clientsocket.h"
48 #include "internet_addressing.h"
50 #include "citadel_dirs.h"
52 struct p3cq { // module-local queue of pop3 client work that needs processing
62 static int doing_pop3client = 0;
63 struct p3cq *p3cq = NULL;
66 * Process one mailbox.
68 void pop3client_one_mailbox(char *room, const char *host, const char *user, const char *pass, int keep, long interval)
70 syslog(LOG_DEBUG, "pop3client: room=<%s> host=<%s> user=<%s> keep=<%d> interval=<%ld>", room, host, user, keep, interval);
74 CURLcode res = CURLE_OK;
79 curl = curl_easy_init();
86 curl_easy_setopt(curl, CURLOPT_USERNAME, user);
87 curl_easy_setopt(curl, CURLOPT_PASSWORD, pass);
88 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
89 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
90 curl_easy_setopt(curl, CURLOPT_TIMEOUT, 15);
91 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback); // What to do with downloaded data
92 curl_easy_setopt(curl, CURLOPT_WRITEDATA, Uidls); // Give it our StrBuf to work with
93 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "UIDL");
95 /* Try POP3S (SSL encrypted) first */
96 snprintf(url, sizeof url, "pop3s://%s", host);
97 curl_easy_setopt(curl, CURLOPT_URL, url);
98 res = curl_easy_perform(curl);
99 if (res == CURLE_OK) {
101 syslog(LOG_DEBUG, "pop3client: POP3S connection 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);
105 res = curl_easy_perform(curl);
108 if (res != CURLE_OK) {
109 syslog(LOG_DEBUG, "pop3client: POP3 connection failed: %s", curl_easy_strerror(res));
110 curl_easy_cleanup(curl);
115 // If we got this far, a connection was established, we know whether it's pop3s or pop3, and UIDL is supported.
116 // Now go through the UIDL list and look for messages.
118 int num_msgs = num_tokens(ChrPtr(Uidls), '\n');
119 syslog(LOG_DEBUG, "pop3client: there are %d messages", num_msgs);
120 for (i=0; i<num_msgs; ++i) {
122 extract_token(oneuidl, ChrPtr(Uidls), i, '\n', sizeof oneuidl);
123 if (strlen(oneuidl) > 2) {
124 if (oneuidl[strlen(oneuidl)-1] == '\r') {
125 oneuidl[strlen(oneuidl)-1] = 0;
127 int this_msg = atoi(oneuidl);
128 char *c = strchr(oneuidl, ' ');
129 if (c) strcpy(oneuidl, ++c);
131 // Make up the Use Table record so we can check if we've already seen this message.
132 StrBuf *UT = NewStrBuf();
133 StrBufPrintf(UT, "pop3/%s/%s:%s@%s", room, oneuidl, user, host);
134 int already_seen = CheckIfAlreadySeen(UT);
137 // Only fetch the message if we haven't seen it before.
138 if (already_seen == 0) {
139 StrBuf *TheMsg = NewStrBuf();
140 snprintf(cmd, sizeof cmd, "RETR %d", this_msg);
141 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, cmd);
142 curl_easy_setopt(curl, CURLOPT_WRITEDATA, TheMsg);
143 res = curl_easy_perform(curl);
144 if (res == CURLE_OK) {
145 struct CtdlMessage *msg = convert_internet_message_buf(&TheMsg);
146 CtdlSubmitMsg(msg, NULL, room, 0);
153 // Unless the configuration says to keep the message on the server, delete it.
155 snprintf(cmd, sizeof cmd, "DELE %d", this_msg);
156 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, cmd);
157 res = curl_easy_perform(curl);
161 syslog(LOG_DEBUG, "pop3client: %s has already been retrieved", oneuidl);
166 curl_easy_cleanup(curl);
173 * Scan a room's netconfig to determine whether it requires POP3 aggregation
175 void pop3client_scan_room(struct ctdlroom *qrbuf, void *data, OneRoomNetCfg *OneRNCFG)
177 const RoomNetCfgLine *pLine;
178 struct p3cq *pptr = NULL;
180 if (server_shutting_down) return;
182 pLine = OneRNCFG->NetConfigs[pop3client];
184 while (pLine != NULL)
186 pptr = malloc(sizeof(struct p3cq));
189 pptr->room = strdup(qrbuf->QRname);
190 pptr->host = strdup(ChrPtr(pLine->Value[0]));
191 pptr->user = strdup(ChrPtr(pLine->Value[1]));
192 pptr->pass = strdup(ChrPtr(pLine->Value[2]));
193 pptr->keep = atoi(ChrPtr(pLine->Value[3]));
194 pptr->interval = atol(ChrPtr(pLine->Value[4]));
201 void pop3client_scan(void) {
202 static time_t last_run = 0L;
204 struct p3cq *pptr = NULL;
206 if (CtdlGetConfigLong("c_pop3_fastest") < CtdlGetConfigLong("c_pop3_fetch")) {
207 fastest_scan = CtdlGetConfigLong("c_pop3_fastest");
210 fastest_scan = CtdlGetConfigLong("c_pop3_fetch");
214 * Run POP3 aggregation no more frequently than once every n seconds
216 if ( (time(NULL) - last_run) < fastest_scan ) {
221 * This is a simple concurrency check to make sure only one pop3client
222 * run is done at a time. We could do this with a mutex, but since we
223 * don't really require extremely fine granularity here, we'll do it
224 * with a static variable instead.
226 if (doing_pop3client) return;
227 doing_pop3client = 1;
229 syslog(LOG_DEBUG, "pop3client: scan started");
230 CtdlForEachNetCfgRoom(pop3client_scan_room, NULL);
233 * We have to queue and process in separate phases, otherwise we leave a cursor open
235 syslog(LOG_DEBUG, "pop3client: processing started");
236 while (p3cq != NULL) {
240 pop3client_one_mailbox(pptr->room, pptr->host, pptr->user, pptr->pass, pptr->keep, pptr->interval);
249 syslog(LOG_DEBUG, "pop3client: ended");
250 last_run = time(NULL);
251 doing_pop3client = 0;
255 CTDL_MODULE_INIT(pop3client)
259 CtdlREGISTERRoomCfgType(pop3client, ParseGeneric, 0, 5, SerializeGeneric, DeleteGenericCfgLine);
260 CtdlRegisterSessionHook(pop3client_scan, EVT_TIMER, PRIO_AGGR + 50);
263 /* return our module id for the log */