/* $Id$ * $URL$ * * Plugin to check POP3 mail accounts * * Copyright (C) 2004 Javi Garcia Dominguez (aka Stolz) * Based on code from pop3check (C) 1999 http://sourceforge.net/projects/pop3check * Simon Liddington is the pop3check current maintainer. * The pop3check original author is Steven Radack . * * Copyright (C) 2004 The LCD4Linux Team * * This file is a pluging for LCD4Linux. * * LCD4Linux is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * LCD4Linux is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * */ #include "config.h" #include #include #include #include "debug.h" #include "plugin.h" #include "cfg.h" /*added */ #include #include /*#include */ #include #include /*#include */ #include #ifdef WITH_DMALLOC #include #endif /*POP 3 */ #define POPERR "-ERR" #define LOCKEDERR "-ERR account is locked by another session or for maintenance, try again." #define BUFSIZE 8192 #define POP3PORT 110 #define MAX_NUM_ACCOUNTS 3 struct check { int id; char *username; char *password; char *server; int port; int messages; struct check *next; }; /************************ PROTOTYPES ********************************/ /* list */ static struct check *check_node_alloc(void); static void check_node_add(struct check **head, struct check *new_check); static void check_destroy(struct check **head); /* pop3 */ static void pop3_check_messages(struct check *hi, int verbose); static void pop3_recv_crlf_terminated(int sockfd, char *buf, int size); /* socket */ static int tcp_connect(struct check *hi); /************************ GLOBAL ***********************************/ static char Section[] = "Plugin:POP3"; static struct check *head = NULL; /********************************************************************/ /************************ LIST ***********************************/ static struct check *check_node_alloc(void) { struct check *new_check; new_check = (struct check *) calloc(1, sizeof(struct check)); if (new_check == NULL) { error("[POP3] out of memory\n"); } return new_check; } static void check_node_add(struct check **head, struct check *new_check) { new_check->next = *head; *head = new_check; } static void check_destroy(struct check **head) { struct check *iter; while (*head) { iter = (*head)->next; free((*head)->username); free((*head)->password); free((*head)->server); free(*head); *head = iter; } *head = NULL; } /************************ POP3 ********************************/ static void pop3_check_messages(struct check *hi, int verbose) { char buf[BUFSIZE]; int sockfd; if ((sockfd = tcp_connect(hi)) < 0) { hi->messages = -1; return; } pop3_recv_crlf_terminated(sockfd, buf, sizeof(buf)); /* server greeting */ if (verbose) info("[POP3] %s -> %s\n", hi->server, buf); snprintf(buf, sizeof(buf), "USER %s\r\n", hi->username); write(sockfd, buf, strlen(buf)); buf[strlen(buf) - 1] = '\0'; if (verbose) info("[POP3] %s <- %s\n", hi->server, buf); pop3_recv_crlf_terminated(sockfd, buf, sizeof(buf)); /* response from USER command */ if (verbose) info("[POP3] %s -> %s\n", hi->server, buf); snprintf(buf, sizeof(buf), "PASS %s\r\n", hi->password); write(sockfd, buf, strlen(buf)); if (verbose) info("[POP3] %s <- PASS ???\n", hi->server); pop3_recv_crlf_terminated(sockfd, buf, sizeof(buf)); /* response from PASS command */ if (verbose) info("[POP3] %s -> %s\n", hi->server, buf); if (strncmp(buf, LOCKEDERR, strlen(LOCKEDERR)) == 0) { hi->messages = -2; close(sockfd); return; } if (strncmp(buf, POPERR, strlen(POPERR)) == 0) { error("[POP3] error logging into %s\n", hi->server); error("[POP3] server responded: %s\n", buf); hi->messages = -1; close(sockfd); return; } snprintf(buf, sizeof(buf), "STAT\r\n"); write(sockfd, buf, strlen(buf)); if (verbose) info("[POP3] %s <- STAT\n", hi->server); pop3_recv_crlf_terminated(sockfd, buf, sizeof(buf)); /* response from PASS command */ if (verbose) info("[POP3] %s -> %s\n", hi->server, buf); strtok(buf, " "); hi->messages = atoi(strtok(NULL, " ")); snprintf(buf, sizeof(buf), "QUIT\r\n"); write(sockfd, buf, strlen(buf)); if (verbose) info("[POP3] %s <- QUIT\n", hi->server); pop3_recv_crlf_terminated(sockfd, buf, sizeof(buf)); /* response from QUIT command */ if (verbose) info("[POP3] %s -> %s\n", hi->server, buf); close(sockfd); } static void pop3_recv_crlf_terminated(int sockfd, char *buf, int size) { /* receive one line server responses terminated with CRLF */ char *pos; int bytes = 0; memset(buf, 0, size); while ((pos = strstr(buf, "\r\n")) == NULL) bytes += read(sockfd, buf + bytes, size - bytes); *pos = '\0'; } /************************ SOCKET ********************************/ static int tcp_connect(struct check *hi) { struct sockaddr_in addr; struct hostent *he = gethostbyname(hi->server); int sockfd; if (hi == NULL) return -1; if (!he) { error("[POP3] Failed to lookup %s\n", hi->server); return (-1); } memset((char *) &addr, 0, sizeof(struct sockaddr_in)); addr.sin_family = AF_INET; memcpy(&(addr.sin_addr.s_addr), he->h_addr, he->h_length); addr.sin_port = htons(hi->port); if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { perror("socket()"); return (-1); } if (connect(sockfd, (struct sockaddr *) &addr, sizeof(struct sockaddr)) < 0) { perror("connect()"); close(sockfd); return (-1); } return (sockfd); } static int getConfig(void) { struct check *node = NULL; int i, n = 0; char *user = (char *) calloc(1, sizeof("user") + sizeof(int)); char *password = (char *) calloc(1, sizeof("password") + sizeof(int)); char *server = (char *) calloc(1, sizeof("server") + sizeof(int)); char *port = (char *) calloc(1, sizeof("port") + sizeof(int)); for (i = 1; i <= MAX_NUM_ACCOUNTS; i++) { char *x; sprintf(user, "user%d", i); sprintf(password, "password%d", i); sprintf(server, "server%d", i); sprintf(port, "port%d", i); x = cfg_get(Section, server, ""); if (*x == '\0') { info("[POP3] No '%s.%s' entry from %s, disabling POP3 account #%d", Section, server, cfg_source(), i); free(x); } else { node = check_node_alloc(); node->id = i; node->server = x; node->messages = 0; node->next = NULL; x = cfg_get(Section, user, ""); if (*x == '\0') { info("[POP3] No '%s.%s' entry from %s, disabling POP3 account #%d", Section, user, cfg_source(), i); free(x); } else { node->username = x; x = cfg_get(Section, password, ""); if (*x == '\0') { info("[POP3] No '%s.%s' entry from %s, disabling POP3 account #%d", Section, password, cfg_source(), i); free(x); } else { node->password = x; if (cfg_number(Section, port, POP3PORT, 1, 65536, &node->port) < 1) { info("[POP3] No '%s.%s' entry from %s, %d will be used for account #%d", Section, port, cfg_source(), POP3PORT, i); } check_node_add(&head, node); n++; } } } } return (n); } static int configure_pop3(void) { static int configured = 0; int n; if (configured != 0) return configured; n = getConfig(); /* by now, head should point to a list of all our accounts */ if (head) { info("[POP3] %d POP3 accounts have been succesfully defined", n); configured = 1; } else { configured = -1; } return configured; } static void my_POP3check(RESULT * result, RESULT * check) { double param = R2N(check); struct check *node = NULL; double value; if (configure_pop3() < 0) { value = -1; SetResult(&result, R_NUMBER, &value); return; } for (node = head; node; node = node->next) { if (node->id == param) break; } if (node == NULL) { /*Inexistent account */ value = -1; } else { pop3_check_messages(node, 0); value = (double) node->messages; } SetResult(&result, R_NUMBER, &value); } int plugin_init_pop3(void) { AddFunction("POP3check", 1, my_POP3check); return 0; } void plugin_exit_pop3(void) { check_destroy(&head); } 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327