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-rw-r--r--plugin_pop3.c346
1 files changed, 346 insertions, 0 deletions
diff --git a/plugin_pop3.c b/plugin_pop3.c
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+/* $Id: plugin_pop3.c 728 2007-01-14 11:14:38Z michael $
+ * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/plugin_pop3.c $
+ *
+ * Plugin to check POP3 mail accounts
+ *
+ * Copyright (C) 2004 Javi Garcia Dominguez (aka Stolz) <javi@gsmlandia.com>
+ * Based on code from pop3check (C) 1999 http://sourceforge.net/projects/pop3check
+ * Simon Liddington <squidly@users.sourceforge.net> is the pop3check current maintainer.
+ * The pop3check original author is Steven Radack <steve@lconn.net>.
+ *
+ * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
+ *
+ * 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 <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include "debug.h"
+#include "plugin.h"
+#include "cfg.h"
+
+/*added */
+#include <sys/socket.h>
+#include <sys/types.h>
+/*#include <netinet/in.h> */
+#include <netdb.h>
+#include <unistd.h>
+/*#include <pwd.h> */
+#include <stdio.h>
+
+#ifdef WITH_DMALLOC
+#include <dmalloc.h>
+#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);
+}
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