vcs.maemo.org Git - monky/blob - src/mail.c

   1 /* Conky, a system monitor, based on torsmo
   2  *
   3  * Any original torsmo code is licensed under the BSD license
   4  *
   5  * All code written since the fork of torsmo is licensed under the GPL
   6  *
   7  * Please see COPYING for details
   8  *
   9  * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
  10  * Copyright (c) 2005-2008 Brenden Matthews, Philip Kovacs, et. al.
  11  *      (see AUTHORS)
  12  * All rights reserved.
  13  *
  14  * This program is free software: you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation, either version 3 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  25  *
  26  */
  27
  28 #include "config.h"
  29 #include "conky.h"
  30 #include "common.h"
  31 #include "logging.h"
  32 #include "mail.h"
  33
  34 #include <errno.h>
  35 #include <stdio.h>
  36 #include <string.h>
  37 #include <unistd.h>
  38 #include <netdb.h>
  39 #include <sys/socket.h>
  40 #include <sys/stat.h>
  41 #include <sys/time.h>
  42
  43 #include <dirent.h>
  44 #include <errno.h>
  45 #include <termios.h>
  46
  47 /* MAX() is defined by a header included from conky.h
  48  * maybe once this is not true anymore, so have an alternative
  49  * waiting to drop in.
  50  *
  51  * #define MAX(a, b)  ((a > b) ? a : b)
  52  */
  53
  54 char *current_mail_spool;
  55
  56 void update_mail_count(struct local_mail_s *mail)
  57 {
  58         struct stat st;
  59
  60         if (mail == NULL) {
  61                 return;
  62         }
  63
  64         /* TODO: use that fine file modification notify on Linux 2.4 */
  65
  66         /* don't check mail so often (9.5s is minimum interval) */
  67         if (current_update_time - mail->last_update < 9.5) {
  68                 return;
  69         } else {
  70                 mail->last_update = current_update_time;
  71         }
  72
  73         if (stat(mail->box, &st)) {
  74                 static int rep;
  75
  76                 if (!rep) {
  77                         ERR("can't stat %s: %s", mail->box, strerror(errno));
  78                         rep = 1;
  79                 }
  80                 return;
  81         }
  82 #if HAVE_DIRENT_H
  83         /* maildir format */
  84         if (S_ISDIR(st.st_mode)) {
  85                 DIR *dir;
  86                 char *dirname;
  87                 struct dirent *dirent;
  88
  89                 mail->mail_count = mail->new_mail_count = 0;
  90                 dirname = (char *) malloc(sizeof(char) * (strlen(mail->box) + 5));
  91                 if (!dirname) {
  92                         ERR("malloc");
  93                         return;
  94                 }
  95                 strcpy(dirname, mail->box);
  96                 strcat(dirname, "/");
  97                 /* checking the cur subdirectory */
  98                 strcat(dirname, "cur");
  99
 100                 dir = opendir(dirname);
 101                 if (!dir) {
 102                         ERR("cannot open directory");
 103                         free(dirname);
 104                         return;
 105                 }
 106                 dirent = readdir(dir);
 107                 while (dirent) {
 108                         /* . and .. are skipped */
 109                         if (dirent->d_name[0] != '.') {
 110                                 mail->mail_count++;
 111                         }
 112                         dirent = readdir(dir);
 113                 }
 114                 closedir(dir);
 115
 116                 dirname[strlen(dirname) - 3] = '\0';
 117                 strcat(dirname, "new");
 118
 119                 dir = opendir(dirname);
 120                 if (!dir) {
 121                         ERR("cannot open directory");
 122                         free(dirname);
 123                         return;
 124                 }
 125                 dirent = readdir(dir);
 126                 while (dirent) {
 127                         /* . and .. are skipped */
 128                         if (dirent->d_name[0] != '.') {
 129                                 mail->new_mail_count++;
 130                                 mail->mail_count++;
 131                         }
 132                         dirent = readdir(dir);
 133                 }
 134                 closedir(dir);
 135
 136                 free(dirname);
 137                 return;
 138         }
 139 #endif
 140         /* mbox format */
 141         if (st.st_mtime != mail->last_mtime) {
 142                 /* yippee, modification time has changed, let's read mail count! */
 143                 static int rep;
 144                 FILE *fp;
 145                 int reading_status = 0;
 146
 147                 /* could lock here but I don't think it's really worth it because
 148                  * this isn't going to write mail spool */
 149
 150                 mail->new_mail_count = mail->mail_count = 0;
 151
 152                 fp = open_file(mail->box, &rep);
 153                 if (!fp) {
 154                         return;
 155                 }
 156
 157                 /* NOTE: adds mail as new if there isn't Status-field at all */
 158
 159                 while (!feof(fp)) {
 160                         char buf[128];
 161
 162                         if (fgets(buf, 128, fp) == NULL) {
 163                                 break;
 164                         }
 165
 166                         if (strncmp(buf, "From ", 5) == 0) {
 167                                 /* ignore MAILER-DAEMON */
 168                                 if (strncmp(buf + 5, "MAILER-DAEMON ", 14) != 0) {
 169                                         mail->mail_count++;
 170
 171                                         if (reading_status) {
 172                                                 mail->new_mail_count++;
 173                                         } else {
 174                                                 reading_status = 1;
 175                                         }
 176                                 }
 177                         } else {
 178                                 if (reading_status
 179                                                 && strncmp(buf, "X-Mozilla-Status:", 17) == 0) {
 180                                         /* check that mail isn't already read */
 181                                         if (strchr(buf + 21, '0')) {
 182                                                 mail->new_mail_count++;
 183                                         }
 184
 185                                         reading_status = 0;
 186                                         continue;
 187                                 }
 188                                 if (reading_status && strncmp(buf, "Status:", 7) == 0) {
 189                                         /* check that mail isn't already read */
 190                                         if (strchr(buf + 7, 'R') == NULL) {
 191                                                 mail->new_mail_count++;
 192                                         }
 193
 194                                         reading_status = 0;
 195                                         continue;
 196                                 }
 197                         }
 198
 199                         /* skip until \n */
 200                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 201                                 fgets(buf, 128, fp);
 202                         }
 203                 }
 204
 205                 fclose(fp);
 206
 207                 if (reading_status) {
 208                         mail->new_mail_count++;
 209                 }
 210
 211                 mail->last_mtime = st.st_mtime;
 212         }
 213 }
 214
 215 #define MAXDATASIZE 1000
 216
 217 struct mail_s *parse_mail_args(char type, const char *arg)
 218 {
 219         struct mail_s *mail;
 220         char *tmp;
 221
 222         mail = malloc(sizeof(struct mail_s));
 223         memset(mail, 0, sizeof(struct mail_s));
 224
 225         if (sscanf(arg, "%128s %128s %128s", mail->host, mail->user, mail->pass)
 226                         != 3) {
 227                 if (type == POP3_TYPE) {
 228                         ERR("Scanning IMAP args failed");
 229                 } else if (type == IMAP_TYPE) {
 230                         ERR("Scanning POP3 args failed");
 231                 }
 232         }
 233         // see if password needs prompting
 234         if (mail->pass[0] == '*' && mail->pass[1] == '\0') {
 235                 int fp = fileno(stdin);
 236                 struct termios term;
 237
 238                 tcgetattr(fp, &term);
 239                 term.c_lflag &= ~ECHO;
 240                 tcsetattr(fp, TCSANOW, &term);
 241                 printf("Enter mailbox password (%s@%s): ", mail->user, mail->host);
 242                 scanf("%128s", mail->pass);
 243                 printf("\n");
 244                 term.c_lflag |= ECHO;
 245                 tcsetattr(fp, TCSANOW, &term);
 246         }
 247         // now we check for optional args
 248         tmp = strstr(arg, "-r ");
 249         if (tmp) {
 250                 tmp += 3;
 251                 sscanf(tmp, "%u", &mail->retries);
 252         } else {
 253                 mail->retries = 5;      // 5 retries after failure
 254         }
 255         tmp = strstr(arg, "-i ");
 256         if (tmp) {
 257                 tmp += 3;
 258                 sscanf(tmp, "%f", &mail->interval);
 259         } else {
 260                 mail->interval = 300;   // 5 minutes
 261         }
 262         tmp = strstr(arg, "-p ");
 263         if (tmp) {
 264                 tmp += 3;
 265                 sscanf(tmp, "%lu", &mail->port);
 266         } else {
 267                 if (type == POP3_TYPE) {
 268                         mail->port = 110;       // default pop3 port
 269                 } else if (type == IMAP_TYPE) {
 270                         mail->port = 143;       // default imap port
 271                 }
 272         }
 273         if (type == IMAP_TYPE) {
 274                 tmp = strstr(arg, "-f ");
 275                 if (tmp) {
 276                         tmp += 3;
 277                         sscanf(tmp, "%s", mail->folder);
 278                 } else {
 279                         strncpy(mail->folder, "INBOX", 128);    // default imap inbox
 280                 }
 281         }
 282         tmp = strstr(arg, "-e ");
 283         if (tmp) {
 284                 int len = 1024;
 285                 tmp += 3;
 286
 287                 if (tmp[0] == '\'') {
 288                         len = strstr(tmp + 1, "'") - tmp - 1;
 289                         if (len > 1024) {
 290                                 len = 1024;
 291                         }
 292                 }
 293                 strncpy(mail->command, tmp + 1, len);
 294         } else {
 295                 mail->command[0] = '\0';
 296         }
 297         mail->p_timed_thread = NULL;
 298         return mail;
 299 }
 300
 301 int imap_command(int sockfd, const char *command, char *response, const char *verify)
 302 {
 303         struct timeval timeout;
 304         fd_set fdset;
 305         int res, numbytes = 0;
 306         if (send(sockfd, command, strlen(command), 0) == -1) {
 307                 perror("send");
 308                 return -1;
 309         }
 310         timeout.tv_sec = 60;    // 60 second timeout i guess
 311         timeout.tv_usec = 0;
 312         FD_ZERO(&fdset);
 313         FD_SET(sockfd, &fdset);
 314         res = select(sockfd + 1, &fdset, NULL, NULL, &timeout);
 315         if (res > 0) {
 316                 if ((numbytes = recv(sockfd, response, MAXDATASIZE - 1, 0)) == -1) {
 317                         perror("recv");
 318                         return -1;
 319                 }
 320         }
 321         DBGP2("imap_command() received: %s", response);
 322         response[numbytes] = '\0';
 323         if (strstr(response, verify) == NULL) {
 324                 return -1;
 325         }
 326         return 0;
 327 }
 328
 329 int imap_check_status(char *recvbuf, struct mail_s *mail)
 330 {
 331         char *reply;
 332         reply = strstr(recvbuf, " (MESSAGES ");
 333         if (!reply || strlen(reply) < 2) {
 334                 return -1;
 335         }
 336         reply += 2;
 337         *strchr(reply, ')') = '\0';
 338         if (reply == NULL) {
 339                 ERR("Error parsing IMAP response: %s", recvbuf);
 340                 return -1;
 341         } else {
 342                 timed_thread_lock(mail->p_timed_thread);
 343                 sscanf(reply, "MESSAGES %lu UNSEEN %lu", &mail->messages,
 344                                 &mail->unseen);
 345                 timed_thread_unlock(mail->p_timed_thread);
 346         }
 347         return 0;
 348 }
 349
 350 void imap_unseen_command(struct mail_s *mail, unsigned long old_unseen, unsigned long old_messages)
 351 {
 352         if (strlen(mail->command) > 1 && (mail->unseen > old_unseen
 353                                 || (mail->messages > old_messages && mail->unseen > 0))) {
 354                 // new mail goodie
 355                 if (system(mail->command) == -1) {
 356                         perror("system()");
 357                 }
 358         }
 359 }
 360
 361 void *imap_thread(void *arg)
 362 {
 363         int sockfd, numbytes;
 364         char recvbuf[MAXDATASIZE];
 365         char sendbuf[MAXDATASIZE];
 366         unsigned int fail = 0;
 367         unsigned long old_unseen = ULONG_MAX;
 368         unsigned long old_messages = ULONG_MAX;
 369         struct stat stat_buf;
 370         struct hostent he, *he_res = 0;
 371         int he_errno;
 372         char hostbuff[2048];
 373         struct sockaddr_in their_addr;  // connector's address information
 374         struct mail_s *mail = (struct mail_s *)arg;
 375         int has_idle = 0;
 376         int threadfd = timed_thread_readfd(mail->p_timed_thread);
 377
 378 #ifdef HAVE_GETHOSTBYNAME_R
 379         if (gethostbyname_r(mail->host, &he, hostbuff, sizeof(hostbuff), &he_res, &he_errno)) { // get the host info
 380                 ERR("IMAP gethostbyname_r: %s", hstrerror(h_errno));
 381                 exit(1);
 382         }
 383 #else /* HAVE_GETHOSTBYNAME_R */
 384         if ((he_res = gethostbyname(mail->host)) == NULL) {     // get the host info
 385                 herror("gethostbyname");
 386                 exit(1);
 387         }
 388 #endif /* HAVE_GETHOSTBYNAME_R */
 389         while (fail < mail->retries) {
 390                 struct timeval timeout;
 391                 int res;
 392                 fd_set fdset;
 393
 394                 if (fail > 0) {
 395                         ERR("Trying IMAP connection again for %s@%s (try %u/%u)",
 396                                         mail->user, mail->host, fail + 1, mail->retries);
 397                 }
 398                 do {
 399                         if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
 400                                 perror("socket");
 401                                 fail++;
 402                                 break;
 403                         }
 404
 405                         // host byte order
 406                         their_addr.sin_family = AF_INET;
 407                         // short, network byte order
 408                         their_addr.sin_port = htons(mail->port);
 409                         their_addr.sin_addr = *((struct in_addr *) he_res->h_addr);
 410                         // zero the rest of the struct
 411                         memset(&(their_addr.sin_zero), '\0', 8);
 412
 413                         if (connect(sockfd, (struct sockaddr *) &their_addr,
 414                                                 sizeof(struct sockaddr)) == -1) {
 415                                 perror("connect");
 416                                 fail++;
 417                                 break;
 418                         }
 419
 420                         timeout.tv_sec = 60;    // 60 second timeout i guess
 421                         timeout.tv_usec = 0;
 422                         FD_ZERO(&fdset);
 423                         FD_SET(sockfd, &fdset);
 424                         res = select(sockfd + 1, &fdset, NULL, NULL, &timeout);
 425                         if (res > 0) {
 426                                 if ((numbytes = recv(sockfd, recvbuf, MAXDATASIZE - 1, 0)) == -1) {
 427                                         perror("recv");
 428                                         fail++;
 429                                         break;
 430                                 }
 431                         } else {
 432                                 ERR("IMAP connection failed: timeout");
 433                                 fail++;
 434                                 break;
 435                         }
 436                         recvbuf[numbytes] = '\0';
 437                         DBGP2("imap_thread() received: %s", recvbuf);
 438                         if (strstr(recvbuf, "* OK") != recvbuf) {
 439                                 ERR("IMAP connection failed, probably not an IMAP server");
 440                                 fail++;
 441                                 break;
 442                         }
 443                         strncpy(sendbuf, "a1 login ", MAXDATASIZE);
 444                         strncat(sendbuf, mail->user, MAXDATASIZE - strlen(sendbuf) - 1);
 445                         strncat(sendbuf, " ", MAXDATASIZE - strlen(sendbuf) - 1);
 446                         strncat(sendbuf, mail->pass, MAXDATASIZE - strlen(sendbuf) - 1);
 447                         strncat(sendbuf, "\r\n", MAXDATASIZE - strlen(sendbuf) - 1);
 448                         if (imap_command(sockfd, sendbuf, recvbuf, "a1 OK")) {
 449                                 fail++;
 450                                 break;
 451                         }
 452                         if (strstr(recvbuf, " IDLE ") != NULL) {
 453                                 has_idle = 1;
 454                         }
 455
 456                         strncpy(sendbuf, "a2 STATUS ", MAXDATASIZE);
 457                         strncat(sendbuf, mail->folder, MAXDATASIZE - strlen(sendbuf) - 1);
 458                         strncat(sendbuf, " (MESSAGES UNSEEN)\r\n",
 459                                         MAXDATASIZE - strlen(sendbuf) - 1);
 460                         if (imap_command(sockfd, sendbuf, recvbuf, "a2 OK")) {
 461                                 fail++;
 462                                 break;
 463                         }
 464
 465                         if (imap_check_status(recvbuf, mail)) {
 466                                 fail++;
 467                                 break;
 468                         }
 469                         imap_unseen_command(mail, old_unseen, old_messages);
 470                         fail = 0;
 471                         old_unseen = mail->unseen;
 472                         old_messages = mail->messages;
 473
 474                         if (has_idle) {
 475                                 strncpy(sendbuf, "a4 SELECT ", MAXDATASIZE);
 476                                 strncat(sendbuf, mail->folder, MAXDATASIZE - strlen(sendbuf) - 1);
 477                                 strncat(sendbuf, "\r\n", MAXDATASIZE - strlen(sendbuf) - 1);
 478                                 if (imap_command(sockfd, sendbuf, recvbuf, "a4 OK")) {
 479                                         fail++;
 480                                         break;
 481                                 }
 482
 483                                 strncpy(sendbuf, "a5 IDLE\r\n", MAXDATASIZE);
 484                                 if (imap_command(sockfd, sendbuf, recvbuf, "+ idling")) {
 485                                         fail++;
 486                                         break;
 487                                 }
 488                                 recvbuf[0] = '\0';
 489
 490                                 while (1) {
 491                                         /*
 492                                          * RFC 2177 says we have to re-idle every 29 minutes.
 493                                          * We'll do it every 20 minutes to be safe.
 494                                          */
 495                                         timeout.tv_sec = 1200;
 496                                         timeout.tv_usec = 0;
 497                                         FD_ZERO(&fdset);
 498                                         FD_SET(sockfd, &fdset);
 499                                         FD_SET(threadfd, &fdset);
 500                                         res = select(MAX(sockfd + 1, threadfd + 1), &fdset, NULL, NULL, NULL);
 501                                         if (timed_thread_test(mail->p_timed_thread, 1) || (res == -1 && errno == EINTR) || FD_ISSET(threadfd, &fdset)) {
 502                                                 if ((fstat(sockfd, &stat_buf) == 0) && S_ISSOCK(stat_buf.st_mode)) {
 503                                                         /* if a valid socket, close it */
 504                                                         close(sockfd);
 505                                                 }
 506                                                 timed_thread_exit(mail->p_timed_thread);
 507                                         } else if (res > 0) {
 508                                                 if ((numbytes = recv(sockfd, recvbuf, MAXDATASIZE - 1, 0)) == -1) {
 509                                                         perror("recv idling");
 510                                                         fail++;
 511                                                         break;
 512                                                 }
 513                                         } else {
 514                                                 break;
 515                                         }
 516                                         recvbuf[numbytes] = '\0';
 517                                         DBGP2("imap_thread() received: %s", recvbuf);
 518                                         if (strlen(recvbuf) > 2) {
 519                                                 unsigned long messages, recent;
 520                                                 char *buf = recvbuf;
 521                                                 buf = strstr(buf, "EXISTS");
 522                                                 while (buf && strlen(buf) > 1 && strstr(buf + 1, "EXISTS")) {
 523                                                         buf = strstr(buf + 1, "EXISTS");
 524                                                 }
 525                                                 if (buf) {
 526                                                         // back up until we reach '*'
 527                                                         while (buf >= recvbuf && buf[0] != '*') {
 528                                                                 buf--;
 529                                                         }
 530                                                         if (sscanf(buf, "* %lu EXISTS\r\n", &messages) == 1) {
 531                                                                 timed_thread_lock(mail->p_timed_thread);
 532                                                                 mail->messages = messages;
 533                                                                 timed_thread_unlock(mail->p_timed_thread);
 534                                                         }
 535                                                 }
 536                                                 buf = recvbuf;
 537                                                 buf = strstr(buf, "RECENT");
 538                                                 while (buf && strlen(buf) > 1 && strstr(buf + 1, "RECENT")) {
 539                                                         buf = strstr(buf + 1, "RECENT");
 540                                                 }
 541                                                 if (buf) {
 542                                                         // back up until we reach '*'
 543                                                         while (buf >= recvbuf && buf[0] != '*') {
 544                                                                 buf--;
 545                                                         }
 546                                                         if (sscanf(buf, "* %lu RECENT\r\n", &recent) != 1) {
 547                                                                 recent = 0;
 548                                                         }
 549                                                 }
 550                                                 /*
 551                                                  * check if we got a FETCH from server, recent was
 552                                                  * something other than 0, or we had a timeout
 553                                                  */
 554                                                 buf = recvbuf;
 555                                                 if (recent > 0 || (buf && strstr(buf, " FETCH ")) || timeout.tv_sec == 0) {
 556                                                         // re-check messages and unseen
 557                                                         if (imap_command(sockfd, "DONE\r\n", recvbuf, "a5 OK")) {
 558                                                                 fail++;
 559                                                                 break;
 560                                                         }
 561                                                         strncpy(sendbuf, "a2 STATUS ", MAXDATASIZE);
 562                                                         strncat(sendbuf, mail->folder, MAXDATASIZE - strlen(sendbuf) - 1);
 563                                                         strncat(sendbuf, " (MESSAGES UNSEEN)\r\n",
 564                                                                         MAXDATASIZE - strlen(sendbuf) - 1);
 565                                                         if (imap_command(sockfd, sendbuf, recvbuf, "a2 OK")) {
 566                                                                 fail++;
 567                                                                 break;
 568                                                         }
 569                                                         if (imap_check_status(recvbuf, mail)) {
 570                                                                 fail++;
 571                                                                 break;
 572                                                         }
 573                                                         strncpy(sendbuf, "a5 IDLE\r\n", MAXDATASIZE);
 574                                                         if (imap_command(sockfd, sendbuf, recvbuf, "+ idling")) {
 575                                                                 fail++;
 576                                                                 break;
 577                                                         }
 578                                                 }
 579                                                 /*
 580                                                  * check if we got a BYE from server
 581                                                  */
 582                                                 buf = recvbuf;
 583                                                 if (buf && strstr(buf, "* BYE")) {
 584                                                         // need to re-connect
 585                                                         break;
 586                                                 }
 587                                         }
 588                                         imap_unseen_command(mail, old_unseen, old_messages);
 589                                         fail = 0;
 590                                         old_unseen = mail->unseen;
 591                                         old_messages = mail->messages;
 592                                 }
 593                         } else {
 594                                 strncpy(sendbuf, "a3 logout\r\n", MAXDATASIZE);
 595                                 if (send(sockfd, sendbuf, strlen(sendbuf), 0) == -1) {
 596                                         perror("send a3");
 597                                         fail++;
 598                                         break;
 599                                 }
 600                                 timeout.tv_sec = 60;    // 60 second timeout i guess
 601                                 timeout.tv_usec = 0;
 602                                 FD_ZERO(&fdset);
 603                                 FD_SET(sockfd, &fdset);
 604                                 res = select(sockfd + 1, &fdset, NULL, NULL, &timeout);
 605                                 if (res > 0) {
 606                                         if ((numbytes = recv(sockfd, recvbuf, MAXDATASIZE - 1, 0)) == -1) {
 607                                                 perror("recv a3");
 608                                                 fail++;
 609                                                 break;
 610                                         }
 611                                 }
 612                                 recvbuf[numbytes] = '\0';
 613                                 DBGP2("imap_thread() received: %s", recvbuf);
 614                                 if (strstr(recvbuf, "a3 OK") == NULL) {
 615                                         ERR("IMAP logout failed: %s", recvbuf);
 616                                         fail++;
 617                                         break;
 618                                 }
 619                         }
 620                 } while (0);
 621                 if ((fstat(sockfd, &stat_buf) == 0) && S_ISSOCK(stat_buf.st_mode)) {
 622                         /* if a valid socket, close it */
 623                         close(sockfd);
 624                 }
 625                 if (timed_thread_test(mail->p_timed_thread, 0)) {
 626                         timed_thread_exit(mail->p_timed_thread);
 627                 }
 628         }
 629         mail->unseen = 0;
 630         mail->messages = 0;
 631         return 0;
 632 }
 633
 634 int pop3_command(int sockfd, const char *command, char *response, const char *verify)
 635 {
 636         struct timeval timeout;
 637         fd_set fdset;
 638         int res, numbytes = 0;
 639         if (send(sockfd, command, strlen(command), 0) == -1) {
 640                 perror("send");
 641                 return -1;
 642         }
 643         timeout.tv_sec = 60;    // 60 second timeout i guess
 644         timeout.tv_usec = 0;
 645         FD_ZERO(&fdset);
 646         FD_SET(sockfd, &fdset);
 647         res = select(sockfd + 1, &fdset, NULL, NULL, &timeout);
 648         if (res > 0) {
 649                 if ((numbytes = recv(sockfd, response, MAXDATASIZE - 1, 0)) == -1) {
 650                         perror("recv");
 651                         return -1;
 652                 }
 653         }
 654         DBGP2("pop3_command() received: %s", response);
 655         response[numbytes] = '\0';
 656         if (strstr(response, verify) == NULL) {
 657                 return -1;
 658         }
 659         return 0;
 660 }
 661
 662 void *pop3_thread(void *arg)
 663 {
 664         int sockfd, numbytes;
 665         char recvbuf[MAXDATASIZE];
 666         char sendbuf[MAXDATASIZE];
 667         char *reply;
 668         unsigned int fail = 0;
 669         unsigned long old_unseen = ULONG_MAX;
 670         struct stat stat_buf;
 671         struct hostent he, *he_res = 0;
 672         int he_errno;
 673         char hostbuff[2048];
 674         struct sockaddr_in their_addr;  // connector's address information
 675         struct mail_s *mail = (struct mail_s *)arg;
 676
 677 #ifdef HAVE_GETHOSTBYNAME_R
 678         if (gethostbyname_r(mail->host, &he, hostbuff, sizeof(hostbuff), &he_res, &he_errno)) { // get the host info
 679                 ERR("POP3 gethostbyname_r: %s", hstrerror(h_errno));
 680                 exit(1);
 681         }
 682 #else /* HAVE_GETHOSTBYNAME_R */
 683         if ((he_res = gethostbyname(mail->host)) == NULL) {     // get the host info
 684                 herror("gethostbyname");
 685                 exit(1);
 686         }
 687 #endif /* HAVE_GETHOSTBYNAME_R */
 688         while (fail < mail->retries) {
 689                 struct timeval timeout;
 690                 int res;
 691                 fd_set fdset;
 692
 693                 if (fail > 0) {
 694                         ERR("Trying POP3 connection again for %s@%s (try %u/%u)",
 695                                         mail->user, mail->host, fail + 1, mail->retries);
 696                 }
 697                 do {
 698                         if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
 699                                 perror("socket");
 700                                 fail++;
 701                                 break;
 702                         }
 703
 704                         // host byte order
 705                         their_addr.sin_family = AF_INET;
 706                         // short, network byte order
 707                         their_addr.sin_port = htons(mail->port);
 708                         their_addr.sin_addr = *((struct in_addr *) he_res->h_addr);
 709                         // zero the rest of the struct
 710                         memset(&(their_addr.sin_zero), '\0', 8);
 711
 712                         if (connect(sockfd, (struct sockaddr *) &their_addr,
 713                                                 sizeof(struct sockaddr)) == -1) {
 714                                 perror("connect");
 715                                 fail++;
 716                                 break;
 717                         }
 718
 719                         timeout.tv_sec = 60;    // 60 second timeout i guess
 720                         timeout.tv_usec = 0;
 721                         FD_ZERO(&fdset);
 722                         FD_SET(sockfd, &fdset);
 723                         res = select(sockfd + 1, &fdset, NULL, NULL, &timeout);
 724                         if (res > 0) {
 725                                 if ((numbytes = recv(sockfd, recvbuf, MAXDATASIZE - 1, 0)) == -1) {
 726                                         perror("recv");
 727                                         fail++;
 728                                         break;
 729                                 }
 730                         } else {
 731                                 ERR("POP3 connection failed: timeout\n");
 732                                 fail++;
 733                                 break;
 734                         }
 735                         DBGP2("pop3_thread received: %s", recvbuf);
 736                         recvbuf[numbytes] = '\0';
 737                         if (strstr(recvbuf, "+OK ") != recvbuf) {
 738                                 ERR("POP3 connection failed, probably not a POP3 server");
 739                                 fail++;
 740                                 break;
 741                         }
 742                         strncpy(sendbuf, "USER ", MAXDATASIZE);
 743                         strncat(sendbuf, mail->user, MAXDATASIZE - strlen(sendbuf) - 1);
 744                         strncat(sendbuf, "\r\n", MAXDATASIZE - strlen(sendbuf) - 1);
 745                         if (pop3_command(sockfd, sendbuf, recvbuf, "+OK ")) {
 746                                 fail++;
 747                                 break;
 748                         }
 749
 750                         strncpy(sendbuf, "PASS ", MAXDATASIZE);
 751                         strncat(sendbuf, mail->pass, MAXDATASIZE - strlen(sendbuf) - 1);
 752                         strncat(sendbuf, "\r\n", MAXDATASIZE - strlen(sendbuf) - 1);
 753                         if (pop3_command(sockfd, sendbuf, recvbuf, "+OK ")) {
 754                                 ERR("POP3 server login failed: %s", recvbuf);
 755                                 fail++;
 756                                 break;
 757                         }
 758
 759                         strncpy(sendbuf, "STAT\r\n", MAXDATASIZE);
 760                         if (pop3_command(sockfd, sendbuf, recvbuf, "+OK ")) {
 761                                 perror("send STAT");
 762                                 fail++;
 763                                 break;
 764                         }
 765
 766                         // now we get the data
 767                         reply = recvbuf + 4;
 768                         if (reply == NULL) {
 769                                 ERR("Error parsing POP3 response: %s", recvbuf);
 770                                 fail++;
 771                                 break;
 772                         } else {
 773                                 timed_thread_lock(mail->p_timed_thread);
 774                                 sscanf(reply, "%lu %lu", &mail->unseen, &mail->used);
 775                                 timed_thread_unlock(mail->p_timed_thread);
 776                         }
 777
 778                         strncpy(sendbuf, "QUIT\r\n", MAXDATASIZE);
 779                         if (pop3_command(sockfd, sendbuf, recvbuf, "+OK")) {
 780                                 ERR("POP3 logout failed: %s", recvbuf);
 781                                 fail++;
 782                                 break;
 783                         }
 784
 785                         if (strlen(mail->command) > 1 && mail->unseen > old_unseen) {
 786                                 // new mail goodie
 787                                 if (system(mail->command) == -1) {
 788                                         perror("system()");
 789                                 }
 790                         }
 791                         fail = 0;
 792                         old_unseen = mail->unseen;
 793                 } while (0);
 794                 if ((fstat(sockfd, &stat_buf) == 0) && S_ISSOCK(stat_buf.st_mode)) {
 795                         /* if a valid socket, close it */
 796                         close(sockfd);
 797                 }
 798                 if (timed_thread_test(mail->p_timed_thread, 0)) {
 799                         timed_thread_exit(mail->p_timed_thread);
 800                 }
 801         }
 802         mail->unseen = 0;
 803         mail->used = 0;
 804         return 0;
 805 }
 806