meillo@0: /* pop3_in.c, Copyright (C) 2000 by Oliver Kurth,
meillo@0:  *
meillo@0:  * This program is free software; you can redistribute it and/or modify
meillo@0:  * it under the terms of the GNU General Public License as published by
meillo@0:  * the Free Software Foundation; either version 2 of the License, or
meillo@0:  * (at your option) any later version.
meillo@10:  *
meillo@0:  * This program is distributed in the hope that it will be useful,
meillo@0:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@0:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
meillo@0:  * GNU General Public License for more details.
meillo@0:  *
meillo@0:  * You should have received a copy of the GNU General Public License
meillo@0:  * along with this program; if not, write to the Free Software
meillo@0:  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
meillo@0:  */
meillo@0: 
meillo@0: /* see RFC 1725 */
meillo@0: 
meillo@0: #include "masqmail.h"
meillo@0: #include "pop3_in.h"
meillo@0: #include "readsock.h"
meillo@0: 
meillo@0: #include <sys/wait.h>
meillo@0: #include <sys/stat.h>
meillo@0: 
meillo@0: #ifdef USE_LIB_CRYPTO
meillo@0: #include <openssl/md5.h>
meillo@0: #else
meillo@0: #include "md5/global.h"
meillo@0: #include "md5/md5.h"
meillo@0: #endif
meillo@0: 
meillo@0: #ifdef ENABLE_POP3
meillo@0: 
meillo@0: /* experimental feature */
meillo@0: #define DO_WRITE_UIDL_EARLY 1
meillo@0: 
meillo@10: static gchar*
meillo@10: MD5String(char *string)
meillo@0: {
meillo@10: 	MD5_CTX context;
meillo@10: 	unsigned char digest[16];
meillo@10: 	char str_digest[33];
meillo@10: 	int i;
meillo@0: 
meillo@0: #ifdef USE_LIB_CRYPTO
meillo@10: 	MD5(string, strlen(string), digest);
meillo@0: #else
meillo@10: 	MD5Init(&context);
meillo@10: 	MD5Update(&context, string, strlen(string));
meillo@10: 	MD5Final(digest, &context);
meillo@0: #endif
meillo@10: 	for (i = 0; i < 16; i++)
meillo@10: 		sprintf(str_digest + 2 * i, "%02x", digest[i]);
meillo@0: 
meillo@10: 	return g_strdup(str_digest);
meillo@0: }
meillo@0: 
meillo@10: static pop3_base*
meillo@10: create_pop3base(gint sock, guint flags)
meillo@0: {
meillo@10: 	gint dup_sock;
meillo@0: 
meillo@10: 	pop3_base *popb = (pop3_base *) g_malloc(sizeof(pop3_base));
meillo@10: 	if (popb) {
meillo@10: 		memset(popb, 0, sizeof(pop3_base));
meillo@0: 
meillo@10: 		popb->error = pop3_ok;
meillo@0: 
meillo@10: 		popb->buffer = (gchar *) g_malloc(POP3_BUF_LEN);
meillo@0: 
meillo@10: 		dup_sock = dup(sock);
meillo@10: 		popb->out = fdopen(sock, "w");
meillo@10: 		popb->in = fdopen(dup_sock, "r");
meillo@10: 
meillo@10: 		popb->flags = flags;
meillo@10: 	}
meillo@10: 	return popb;
meillo@0: }
meillo@0: 
meillo@10: static void
meillo@10: pop3_printf(FILE * out, gchar * fmt, ...)
meillo@0: {
meillo@10: 	va_list args;
meillo@10: 	va_start(args, fmt);
meillo@0: 
meillo@10: 	DEBUG(4) {
meillo@10: 		gchar buf[256];
meillo@10: 		va_list args_copy;
meillo@0: 
meillo@10: 		va_copy(args_copy, args);
meillo@10: 		vsnprintf(buf, 255, fmt, args_copy);
meillo@10: 		va_end(args_copy);
meillo@0: 
meillo@10: 		debugf(">>>%s", buf);
meillo@10: 	}
meillo@0: 
meillo@10: 	vfprintf(out, fmt, args);
meillo@10: 	fflush(out);
meillo@0: 
meillo@10: 	va_end(args);
meillo@0: }
meillo@0: 
meillo@10: static gboolean
meillo@10: find_uid(pop3_base * popb, gchar * str)
meillo@0: {
meillo@10: 	GList *node, *node_next;
meillo@0: 
meillo@10: 	for (node = popb->list_uid_old; node; node = node_next) {
meillo@10: 		gchar *uid = (gchar *) (node->data);
meillo@10: 		node_next = node->next;
meillo@10: 		if (strcmp(uid, str) == 0) {
meillo@0: #if 1
meillo@10: 			popb->list_uid_old = g_list_remove_link(popb->list_uid_old, node);
meillo@10: 			g_list_free_1(node);
meillo@10: 			g_free(uid);
meillo@0: #endif
meillo@10: 			return TRUE;
meillo@10: 		}
meillo@10: 	}
meillo@10: 	return FALSE;
meillo@0: }
meillo@0: 
meillo@10: static gboolean
meillo@10: write_uidl(pop3_base * popb, gchar * user)
meillo@0: {
meillo@10: 	gboolean ok = FALSE;
meillo@10: 	GList *node;
meillo@10: 	gchar *filename = g_strdup_printf("%s/popuidl/%s@%s", conf.spool_dir, user, popb->remote_host);
meillo@10: 	gchar *tmpname = g_strdup_printf("%s.tmp", filename);
meillo@10: 	FILE *fptr = fopen(tmpname, "wt");
meillo@0: 
meillo@10: 	if (fptr) {
meillo@10: 		foreach(popb->drop_list, node) {
meillo@10: 			msg_info *info = (msg_info *) (node->data);
meillo@10: 			if (info->is_fetched || info->is_in_uidl)
meillo@10: 				fprintf(fptr, "%s\n", info->uid);
meillo@10: 		}
meillo@10: 		fclose(fptr);
meillo@10: 		ok = (rename(tmpname, filename) != -1);
meillo@10: 	}
meillo@10: 
meillo@10: 	g_free(tmpname);
meillo@10: 	g_free(filename);
meillo@10: 	return ok;
meillo@0: }
meillo@0: 
meillo@10: static gboolean
meillo@10: read_uidl_fname(pop3_base * popb, gchar * filename)
meillo@0: {
meillo@10: 	gboolean ok = FALSE;
meillo@10: 	FILE *fptr = fopen(filename, "rt");
meillo@10: 	gchar buf[256];
meillo@0: 
meillo@10: 	if (fptr) {
meillo@10: 		popb->list_uid_old = NULL;
meillo@10: 		while (fgets(buf, 255, fptr)) {
meillo@10: 			if (buf[strlen(buf) - 1] == '\n') {
meillo@10: 				g_strchomp(buf);
meillo@10: 				popb->list_uid_old = g_list_append(popb->list_uid_old, g_strdup(buf));
meillo@10: 			} else {
meillo@10: 				logwrite(LOG_ALERT, "broken uid: %s\n", buf);
meillo@10: 				break;
meillo@10: 			}
meillo@10: 		}
meillo@10: 		fclose(fptr);
meillo@10: 		ok = TRUE;
meillo@10: 	} else
meillo@10: 		logwrite(LOG_ALERT, "opening of %s failed: %s", filename, strerror(errno));
meillo@10: 	return ok;
meillo@0: }
meillo@0: 
meillo@10: static gboolean
meillo@10: read_uidl(pop3_base * popb, gchar * user)
meillo@0: {
meillo@10: 	gboolean ok = FALSE;
meillo@10: 	struct stat statbuf;
meillo@10: 	gchar *filename = g_strdup_printf("%s/popuidl/%s@%s", conf.spool_dir, user, popb->remote_host);
meillo@0: 
meillo@10: 	if (stat(filename, &statbuf) == 0) {
meillo@10: 		ok = read_uidl_fname(popb, filename);
meillo@10: 		if (ok) {
meillo@10: 			GList *drop_node;
meillo@10: 			foreach(popb->drop_list, drop_node) {
meillo@10: 				msg_info *info = (msg_info *) (drop_node->data);
meillo@10: 				if (find_uid(popb, info->uid)) {
meillo@10: 					DEBUG(5) debugf("msg with uid '%s' already known\n", info->uid);
meillo@10: 					info->is_in_uidl = TRUE;
meillo@10: 					popb->uidl_known_cnt++;
meillo@10: 				} else
meillo@10: 					DEBUG(5) debugf("msg with uid '%s' not known\n", info->uid);
meillo@10: 			}
meillo@10: 		}
meillo@10: 	} else {
meillo@10: 		logwrite(LOG_DEBUG, "no uidl file '%s' found\n", filename);
meillo@10: 		ok = TRUE;
meillo@10: 	}
meillo@0: 
meillo@10: 	g_free(filename);
meillo@10: 	return ok;  /* return code is irrelevant, do not check... */
meillo@0: }
meillo@0: 
meillo@10: static gboolean
meillo@10: read_response(pop3_base * popb, int timeout)
meillo@0: {
meillo@10: 	gint len;
meillo@0: 
meillo@10: 	len = read_sockline(popb->in, popb->buffer, POP3_BUF_LEN, timeout, READSOCKL_CHUG);
meillo@0: 
meillo@10: 	if (len == -3) {
meillo@10: 		popb->error = pop3_timeout;
meillo@10: 		return FALSE;
meillo@10: 	} else if (len == -2) {
meillo@10: 		popb->error = pop3_syntax;
meillo@10: 		return FALSE;
meillo@10: 	} else if (len == -1) {
meillo@10: 		popb->error = pop3_eof;
meillo@10: 		return FALSE;
meillo@10: 	}
meillo@10: 
meillo@10: 	return TRUE;
meillo@0: }
meillo@0: 
meillo@10: static gboolean
meillo@10: check_response(pop3_base * popb)
meillo@0: {
meillo@10: 	char c = popb->buffer[0];
meillo@0: 
meillo@10: 	if (c == '+') {
meillo@10: 		popb->error = pop3_ok;
meillo@10: 		return TRUE;
meillo@10: 	} else if (c == '-')
meillo@10: 		popb->error = pop3_fail;
meillo@10: 	else
meillo@10: 		popb->error = pop3_syntax;
meillo@10: 	return FALSE;
meillo@0: }
meillo@0: 
meillo@10: static gboolean
meillo@10: strtoi(gchar * p, gchar ** pend, gint * val)
meillo@0: {
meillo@10: 	gchar buf[12];
meillo@10: 	gint i = 0;
meillo@0: 
meillo@10: 	while (*p && isspace(*p))
meillo@10: 		p++;
meillo@10: 	if (*p) {
meillo@10: 		while ((i < 11) && isdigit(*p))
meillo@10: 			buf[i++] = *(p++);
meillo@10: 		buf[i] = 0;
meillo@10: 		*val = atoi(buf);
meillo@10: 		*pend = p;
meillo@10: 		return TRUE;
meillo@10: 	}
meillo@10: 	return FALSE;
meillo@0: }
meillo@0: 
meillo@10: static gboolean
meillo@10: check_response_int_int(pop3_base * popb, gint * arg0, gint * arg1)
meillo@0: {
meillo@10: 	if (check_response(popb)) {
meillo@10: 		gchar *p = &(popb->buffer[3]);
meillo@10: 		gchar *pe;
meillo@0: 
meillo@10: 		if (strtoi(p, &pe, arg0)) {
meillo@10: 			DEBUG(5) debugf("arg0 = %d\n", *arg0);
meillo@10: 			p = pe;
meillo@10: 			if (strtoi(p, &pe, arg1))
meillo@10: 				DEBUG(5) debugf("arg1 = %d\n", *arg1);
meillo@10: 			return TRUE;
meillo@10: 		}
meillo@10: 		popb->error = pop3_syntax;
meillo@10: 	}
meillo@10: 	return FALSE;
meillo@0: }
meillo@0: 
meillo@10: static gboolean
meillo@10: get_drop_listing(pop3_base * popb)
meillo@0: {
meillo@10: 	gchar buf[64];
meillo@0: 
meillo@10: 	DEBUG(5) debugf("get_drop_listing() entered\n");
meillo@0: 
meillo@10: 	while (1) {
meillo@10: 		gint len = read_sockline(popb->in, buf, 64, POP3_CMD_TIMEOUT, READSOCKL_CHUG);
meillo@10: 		if (len > 0) {
meillo@10: 			if (buf[0] == '.')
meillo@10: 				return TRUE;
meillo@10: 			else {
meillo@10: 				gint number, msg_size;
meillo@10: 				gchar *p = buf, *pe;
meillo@10: 				if (strtoi(p, &pe, &number)) {
meillo@10: 					p = pe;
meillo@10: 					if (strtoi(p, &pe, &msg_size)) {
meillo@10: 						msg_info *info = g_malloc(sizeof(msg_info));
meillo@10: 						info->number = number;
meillo@10: 						info->size = msg_size;
meillo@0: 
meillo@10: 						DEBUG(5) debugf ("get_drop_listing(), number = %d, msg_size = %d\n", number, msg_size);
meillo@0: 
meillo@10: 						info->uid = NULL;
meillo@10: 						info->is_fetched = FALSE;
meillo@10: 						info->is_in_uidl = FALSE;
meillo@10: 						popb->drop_list = g_list_append(popb->drop_list, info);
meillo@10: 					} else {
meillo@10: 						popb->error = pop3_syntax;
meillo@10: 						break;
meillo@10: 					}
meillo@10: 				} else {
meillo@10: 					popb->error = pop3_syntax;
meillo@10: 					break;
meillo@10: 				}
meillo@10: 			}
meillo@10: 		} else {
meillo@10: 			popb->error = (len == -1) ? pop3_eof : pop3_timeout;
meillo@10: 			return FALSE;
meillo@10: 		}
meillo@0: 	}
meillo@10: 	return FALSE;
meillo@0: }
meillo@0: 
meillo@10: static gboolean
meillo@10: get_uid_listing(pop3_base * popb)
meillo@0: {
meillo@10: 	gchar buf[64];
meillo@0: 
meillo@10: 	while (1) {
meillo@10: 		gint len = read_sockline(popb->in, buf, 64, POP3_CMD_TIMEOUT, READSOCKL_CHUG);
meillo@10: 		if (len > 0) {
meillo@10: 			if (buf[0] == '.')
meillo@10: 				return TRUE;
meillo@10: 			else {
meillo@10: 				gint number;
meillo@10: 				gchar *p = buf, *pe;
meillo@10: 				if (strtoi(p, &pe, &number)) {
meillo@10: 					msg_info *info = NULL;
meillo@10: 					GList *drop_node;
meillo@0: 
meillo@10: 					p = pe;
meillo@10: 					while (*p && isspace(*p))
meillo@10: 						p++;
meillo@0: 
meillo@10: 					foreach(popb->drop_list, drop_node) {
meillo@10: 						msg_info *curr_info = (msg_info *) (drop_node->data);
meillo@10: 						if (curr_info->number == number) {
meillo@10: 							info = curr_info;
meillo@10: 							break;
meillo@10: 						}
meillo@10: 					}
meillo@10: 					if (info) {
meillo@10: 						info->uid = g_strdup(p);
meillo@10: 						g_strchomp(info->uid);
meillo@10: 					}
meillo@0: 
meillo@10: 				} else {
meillo@10: 					popb->error = pop3_syntax;
meillo@10: 					break;
meillo@10: 				}
meillo@10: 			}
meillo@10: 		}
meillo@0: 	}
meillo@10: 	return FALSE;
meillo@0: }
meillo@0: 
meillo@10: static gboolean
meillo@10: check_init_response(pop3_base * popb)
meillo@0: {
meillo@10: 	if (check_response(popb)) {
meillo@10: 		gchar buf[256];
meillo@10: 		gchar *p = popb->buffer;
meillo@10: 		gint i = 0;
meillo@10: 		if (*p) {
meillo@10: 			while (*p && (*p != '<'))
meillo@10: 				p++;
meillo@10: 			while (*p && (*p != '>') && (i < 254))
meillo@10: 				buf[i++] = *(p++);
meillo@10: 			buf[i++] = '>';
meillo@10: 			buf[i] = 0;
meillo@0: 
meillo@10: 			popb->timestamp = g_strdup(buf);
meillo@0: 
meillo@10: 			return TRUE;
meillo@10: 		}
meillo@10: 	}
meillo@10: 	return FALSE;
meillo@0: }
meillo@0: 
meillo@10: void
meillo@10: pop3_in_close(pop3_base * popb)
meillo@0: {
meillo@10: 	GList *node;
meillo@0: 
meillo@10: 	fclose(popb->in);
meillo@10: 	fclose(popb->out);
meillo@0: 
meillo@10: 	close(popb->sock);
meillo@0: 
meillo@10: 	foreach(popb->list_uid_old, node) {
meillo@10: 		gchar *uid = (gchar *) (node->data);
meillo@10: 		g_free(uid);
meillo@10: 	}
meillo@10: 	g_list_free(popb->list_uid_old);
meillo@0: 
meillo@10: 	foreach(popb->drop_list, node) {
meillo@10: 		msg_info *info = (msg_info *) (node->data);
meillo@10: 		if (info->uid)
meillo@10: 			g_free(info->uid);
meillo@10: 		g_free(info);
meillo@10: 	}
meillo@10: 	g_list_free(popb->drop_list);
meillo@0: 
meillo@10: 	if (popb->buffer)
meillo@10: 		g_free(popb->buffer);
meillo@10: 	if (popb->timestamp)
meillo@10: 		g_free(popb->timestamp);
meillo@0: }
meillo@0: 
meillo@10: pop3_base*
meillo@10: pop3_in_open(gchar * host, gint port, GList * resolve_list, guint flags)
meillo@0: {
meillo@10: 	pop3_base *popb;
meillo@10: 	gint sock;
meillo@10: 	mxip_addr *addr;
meillo@0: 
meillo@10: 	DEBUG(5) debugf("pop3_in_open entered, host = %s\n", host);
meillo@0: 
meillo@10: 	if ((addr = connect_resolvelist(&sock, host, port, resolve_list))) {
meillo@10: 		/* create structure to hold status data: */
meillo@10: 		popb = create_pop3base(sock, flags);
meillo@10: 		popb->remote_host = addr->name;
meillo@0: 
meillo@10: 		DEBUG(5) {
meillo@10: 			struct sockaddr_in name;
meillo@10: 			int len;
meillo@10: 			getsockname(sock, (struct sockaddr *) (&name), &len);
meillo@10: 			debugf("socket: name.sin_addr = %s\n", inet_ntoa(name.sin_addr));
meillo@10: 		}
meillo@10: 		return popb;
meillo@10: 	}
meillo@10: 	return NULL;
meillo@0: }
meillo@0: 
meillo@10: pop3_base*
meillo@10: pop3_in_open_child(gchar * cmd, guint flags)
meillo@0: {
meillo@10: 	pop3_base *popb;
meillo@10: 	gint sock;
meillo@0: 
meillo@10: 	DEBUG(5) debugf("pop3_in_open_child entered, cmd = %s\n", cmd);
meillo@0: 
meillo@10: 	sock = child(cmd);
meillo@0: 
meillo@10: 	if (sock > 0) {
meillo@0: 
meillo@10: 		popb = create_pop3base(sock, flags);
meillo@10: 		popb->remote_host = NULL;
meillo@0: 
meillo@10: 		return popb;
meillo@10: 	}
meillo@10: 	logwrite(LOG_ALERT, "child failed (sock = %d): %s\n", sock, strerror(errno));
meillo@0: 
meillo@10: 	return NULL;
meillo@0: }
meillo@0: 
meillo@10: gboolean
meillo@10: pop3_in_init(pop3_base * popb)
meillo@0: {
meillo@10: 	gboolean ok;
meillo@0: 
meillo@10: 	if ((ok = read_response(popb, POP3_INITIAL_TIMEOUT))) {
meillo@10: 		ok = check_init_response(popb);
meillo@10: 	}
meillo@10: 	if (!ok)
meillo@10: 		/* pop3_in_log_failure(popb, NULL); */
meillo@10: 		logwrite(LOG_ALERT, "pop3 failed\n");
meillo@10: 	return ok;
meillo@0: }
meillo@0: 
meillo@10: gboolean
meillo@10: pop3_in_login(pop3_base * popb, gchar * user, gchar * pass)
meillo@0: {
meillo@10: 	if (popb->flags & POP3_FLAG_APOP) {
meillo@0: 
meillo@10: 		gchar *string = g_strdup_printf("%s%s", popb->timestamp, pass);
meillo@10: 		gchar *digest = MD5String(string);
meillo@10: 		pop3_printf(popb->out, "APOP %s %s\r\n", user, digest);
meillo@10: 		g_free(string);
meillo@10: 		g_free(digest);
meillo@10: 		if (read_response(popb, POP3_CMD_TIMEOUT)) {
meillo@10: 			if (check_response(popb))
meillo@10: 				return TRUE;
meillo@10: 			else
meillo@10: 				popb->error = pop3_login_failure;
meillo@10: 		}
meillo@0: 
meillo@10: 	} else {
meillo@0: 
meillo@10: 		pop3_printf(popb->out, "USER %s\r\n", user);
meillo@10: 		if (read_response(popb, POP3_CMD_TIMEOUT)) {
meillo@10: 			if (check_response(popb)) {
meillo@10: 				pop3_printf(popb->out, "PASS %s\r\n", pass);
meillo@10: 				if (read_response(popb, POP3_CMD_TIMEOUT)) {
meillo@10: 					if (check_response(popb))
meillo@10: 						return TRUE;
meillo@10: 					else
meillo@10: 						popb->error = pop3_login_failure;
meillo@10: 				}
meillo@10: 			} else {
meillo@10: 				popb->error = pop3_login_failure;
meillo@10: 			}
meillo@10: 		}
meillo@0: 	}
meillo@10: 	return FALSE;
meillo@0: }
meillo@0: 
meillo@10: gboolean
meillo@10: pop3_in_stat(pop3_base * popb)
meillo@0: {
meillo@10: 	pop3_printf(popb->out, "STAT\r\n");
meillo@10: 	if (read_response(popb, POP3_CMD_TIMEOUT)) {
meillo@10: 		gint msg_cnt, mbox_size;
meillo@10: 		if (check_response_int_int(popb, &msg_cnt, &mbox_size)) {
meillo@10: 			popb->msg_cnt = msg_cnt;
meillo@10: 			popb->mbox_size = mbox_size;
meillo@0: 
meillo@10: 			return TRUE;
meillo@10: 		}
meillo@10: 	}
meillo@10: 	return FALSE;
meillo@0: }
meillo@0: 
meillo@10: gboolean
meillo@10: pop3_in_list(pop3_base * popb)
meillo@0: {
meillo@10: 	pop3_printf(popb->out, "LIST\r\n");
meillo@10: 	if (read_response(popb, POP3_CMD_TIMEOUT)) {
meillo@10: 		if (get_drop_listing(popb)) {
meillo@10: 			return TRUE;
meillo@10: 		}
meillo@10: 	}
meillo@10: 	return FALSE;
meillo@0: }
meillo@0: 
meillo@10: gboolean
meillo@10: pop3_in_dele(pop3_base * popb, gint number)
meillo@0: {
meillo@10: 	pop3_printf(popb->out, "DELE %d\r\n", number);
meillo@10: 	if (read_response(popb, POP3_CMD_TIMEOUT)) {
meillo@10: 		return TRUE;
meillo@10: 	}
meillo@10: 	return FALSE;
meillo@0: }
meillo@0: 
meillo@10: message*
meillo@10: pop3_in_retr(pop3_base * popb, gint number, address * rcpt)
meillo@0: {
meillo@10: 	accept_error err;
meillo@0: 
meillo@10: 	pop3_printf(popb->out, "RETR %d\r\n", number);
meillo@10: 	if (read_response(popb, POP3_CMD_TIMEOUT)) {
meillo@10: 		message *msg = create_message();
meillo@10: 		msg->received_host = popb->remote_host;
meillo@10: 		msg->received_prot = (popb->flags & POP3_FLAG_APOP) ? PROT_APOP : PROT_POP3;
meillo@10: 		msg->transfer_id = (popb->next_id)++;
meillo@10: 		msg->rcpt_list = g_list_append(NULL, copy_address(rcpt));
meillo@0: 
meillo@10: 		if ((err = accept_message(popb->in, msg, ACC_MAIL_FROM_HEAD
meillo@10: 		    | (conf.do_save_envelope_to ? ACC_SAVE_ENVELOPE_TO : 0)))
meillo@10: 		    == AERR_OK)
meillo@10: 			return msg;
meillo@0: 
meillo@10: 		destroy_message(msg);
meillo@10: 	}
meillo@10: 	return NULL;
meillo@0: }
meillo@0: 
meillo@10: gboolean
meillo@10: pop3_in_uidl(pop3_base * popb)
meillo@0: {
meillo@10: 	pop3_printf(popb->out, "UIDL\r\n");
meillo@10: 	if (read_response(popb, POP3_CMD_TIMEOUT)) {
meillo@10: 		if (get_uid_listing(popb)) {
meillo@10: 			return TRUE;
meillo@10: 		}
meillo@10: 	}
meillo@10: 	return FALSE;
meillo@10: }
meillo@0: 
meillo@10: gboolean
meillo@10: pop3_in_quit(pop3_base * popb)
meillo@10: {
meillo@10: 	pop3_printf(popb->out, "QUIT\r\n");
meillo@0: 
meillo@10: 	DEBUG(4) debugf("QUIT\n");
meillo@10: 
meillo@10: 	signal(SIGALRM, SIG_DFL);
meillo@10: 
meillo@10: 	return TRUE;
meillo@0: }
meillo@0: 
meillo@0: /* Send a DELE command for each message in (the old) uid listing.
meillo@0:    This is to prevent mail from to be kept on server, if a previous
meillo@0:    transaction was interupted. */
meillo@10: gboolean
meillo@10: pop3_in_uidl_dele(pop3_base * popb)
meillo@0: {
meillo@10: 	GList *drop_node;
meillo@0: 
meillo@10: 	foreach(popb->drop_list, drop_node) {
meillo@10: 		msg_info *info = (msg_info *) (drop_node->data);
meillo@10: 		/* if(find_uid(popb, info->uid)){ */
meillo@10: 		if (info->is_in_uidl) {
meillo@10: 			if (!pop3_in_dele(popb, info->number))
meillo@10: 				return FALSE;
meillo@10: 			/* TODO: it probably makes sense to also delete this uid from the listing */
meillo@10: 		}
meillo@10: 	}
meillo@10: 	return TRUE;
meillo@0: }
meillo@0: 
meillo@10: gboolean
meillo@10: pop3_get(pop3_base * popb, gchar * user, gchar * pass, address * rcpt, address * return_path, gint max_count, gint max_size, gboolean max_size_delete)
meillo@0: {
meillo@10: 	gboolean ok = FALSE;
meillo@10: 	gint num_children = 0;
meillo@0: 
meillo@10: 	DEBUG(5) debugf("rcpt = %s@%s\n", rcpt->local_part, rcpt->domain);
meillo@0: 
meillo@10: 	signal(SIGCHLD, SIG_DFL);
meillo@0: 
meillo@10: 	if (pop3_in_init(popb)) {
meillo@10: 		if (pop3_in_login(popb, user, pass)) {
meillo@10: 			if (pop3_in_stat(popb)) {
meillo@10: 				if (popb->msg_cnt > 0) {
meillo@0: 
meillo@10: 					logwrite(LOG_NOTICE | LOG_VERBOSE, "%d message(s) for user %s at %s\n", popb->msg_cnt, user, popb->remote_host);
meillo@0: 
meillo@10: 					if (pop3_in_list(popb)) {
meillo@10: 						gboolean do_get = !(popb->flags & POP3_FLAG_UIDL);
meillo@10: 						if (!do_get)
meillo@10: 							do_get = pop3_in_uidl(popb);
meillo@10: 						if (do_get) {
meillo@10: 							gint count = 0;
meillo@10: 							GList *drop_node;
meillo@0: 
meillo@10: 							if (popb->flags & POP3_FLAG_UIDL) {
meillo@10: 								read_uidl(popb, user);
meillo@10: 								logwrite(LOG_VERBOSE | LOG_NOTICE, "%d message(s) already in uidl.\n", popb->uidl_known_cnt);
meillo@10: 							}
meillo@10: 							if ((popb->flags & POP3_FLAG_UIDL) && (popb->flags & POP3_FLAG_UIDL_DELE))
meillo@10: 								pop3_in_uidl_dele(popb);
meillo@0: 
meillo@10: 							foreach(popb->drop_list, drop_node) {
meillo@0: 
meillo@10: 								msg_info *info = (msg_info *) (drop_node->data);
meillo@10: 								gboolean do_get_this = !(popb->flags & POP3_FLAG_UIDL);
meillo@10: 								/* if(!do_get_this) do_get_this = !find_uid(popb, info->uid); */
meillo@10: 								if (!do_get_this)
meillo@10: 									do_get_this = !(info->is_in_uidl);
meillo@10: 								if (do_get_this) {
meillo@0: 
meillo@10: 									if ((info->size < max_size) || (max_size == 0)) {
meillo@10: 										message *msg;
meillo@0: 
meillo@10: 										logwrite(LOG_VERBOSE | LOG_NOTICE, "receiving message %d\n", info->number);
meillo@10: 										msg = pop3_in_retr(popb, info->number, rcpt);
meillo@10: 
meillo@10: 										if (msg) {
meillo@10: 											if (return_path)
meillo@10: 												msg->return_path = copy_address(return_path);
meillo@10: 											if (spool_write(msg, TRUE)) {
meillo@10: 												pid_t pid;
meillo@10: 												logwrite(LOG_NOTICE, "%s <= %s host=%s with %s\n", msg->uid,
meillo@10: 												         addr_string(msg->return_path), popb->remote_host,
meillo@10: 												         (popb->flags & POP3_FLAG_APOP) ? prot_names [PROT_APOP] : prot_names [PROT_POP3]);
meillo@10: 												info->is_fetched = TRUE;
meillo@10: 												count++;
meillo@0: #if DO_WRITE_UIDL_EARLY
meillo@10: 												if (popb->flags & POP3_FLAG_UIDL)
meillo@10: 													write_uidl(popb, user);
meillo@0: #endif
meillo@10: 												if (!conf.do_queue) {
meillo@0: 
meillo@10: 													/* wait for child processes. If there are too many, we wait blocking, before we fork another one */
meillo@10: 													while (num_children > 0) {
meillo@10: 														int status, options = WNOHANG;
meillo@10: 														pid_t pid;
meillo@0: 
meillo@10: 														if (num_children >= POP3_MAX_CHILDREN) {
meillo@10: 															logwrite(LOG_NOTICE, "too many children - waiting\n");
meillo@10: 															options = 0;
meillo@10: 														}
meillo@10: 														if ((pid = waitpid(0, &status, options)) > 0) {
meillo@10: 															num_children--;
meillo@10: 															if (WEXITSTATUS(status) != EXIT_SUCCESS)
meillo@10: 																logwrite(LOG_WARNING, "delivery process with pid %d returned %d\n", pid, WEXITSTATUS (status));
meillo@10: 															if (WIFSIGNALED(status))
meillo@10: 																logwrite(LOG_WARNING, "delivery process with pid %d got signal: %d\n", pid, WTERMSIG (status));
meillo@10: 														} else if (pid < 0) {
meillo@10: 															logwrite(LOG_WARNING, "wait got error: %s\n", strerror(errno));
meillo@10: 														}
meillo@10: 													}
meillo@0: 
meillo@10: 													if ((pid = fork()) == 0) {
meillo@10: 														deliver(msg);
meillo@10: 														_exit(EXIT_SUCCESS);
meillo@10: 													} else if (pid < 0) {
meillo@10: 														logwrite(LOG_ALERT | LOG_VERBOSE, "could not fork for delivery, id = %s: %s\n", msg->uid, strerror(errno));
meillo@10: 													} else
meillo@10: 														num_children++;
meillo@10: 												} else {
meillo@10: 													DEBUG(1) debugf("queuing forced by configuration or option.\n");
meillo@10: 												}
meillo@10: 												if (popb->flags & POP3_FLAG_DELETE)
meillo@10: 													pop3_in_dele(popb, info->number);
meillo@0: 
meillo@10: 												destroy_message(msg);
meillo@10: 											}	/* if(spool_write(msg, TRUE)) */
meillo@10: 										} else {
meillo@10: 											logwrite(LOG_ALERT, "retrieving of message %d failed: %d\n", info->number, popb->error);
meillo@10: 										}
meillo@10: 									} /* if((info->size > max_size) ... */
meillo@10: 									else {
meillo@10: 										logwrite(LOG_NOTICE | LOG_VERBOSE, "size of message #%d (%d) > max_size (%d)\n", info->number, info->size, max_size);
meillo@10: 										if (max_size_delete)
meillo@10: 											if (popb->flags & POP3_FLAG_DELETE)
meillo@10: 												pop3_in_dele(popb, info->number);
meillo@10: 									}
meillo@10: 								} /* if(do_get_this) ... */
meillo@10: 								else {
meillo@10: 									if (popb->flags & POP3_FLAG_UIDL) {
meillo@10: 										info->is_fetched = TRUE;  /* obsolete? */
meillo@10: 										logwrite(LOG_VERBOSE, "message %d already known\n", info->number);
meillo@10: 										DEBUG(1) debugf("message %d (uid = %s) not fetched\n", info->number, info->uid);
meillo@0: #if 0
meillo@0: #if DO_WRITE_UIDL_EARLY
meillo@10: 										write_uidl(popb, user);  /* obsolete? */
meillo@0: #endif
meillo@0: #endif
meillo@10: 									}
meillo@10: 								}
meillo@10: 								if ((max_count != 0) && (count >= max_count))
meillo@10: 									break;
meillo@10: 							}	/* foreach() */
meillo@0: #if DO_WRITE_UIDL_EARLY
meillo@0: #else
meillo@10: 							if (popb->flags & POP3_FLAG_UIDL)
meillo@10: 								write_uidl(popb, user);
meillo@0: #endif
meillo@10: 						}  /* if(pop3_in_uidl(popb) ... */
meillo@10: 					}  /* if(pop3_in_list(popb)) */
meillo@10: 				}  /* if(popb->msg_cnt > 0) */
meillo@10: 				else {
meillo@10: 					logwrite(LOG_NOTICE | LOG_VERBOSE, "no messages for user %s at %s\n", user, popb->remote_host);
meillo@10: 				}
meillo@10: 				ok = TRUE;
meillo@10: 			}
meillo@10: 			pop3_in_quit(popb);
meillo@10: 		} else {
meillo@10: 			logwrite(LOG_ALERT | LOG_VERBOSE, "pop3 login failed for user %s, host = %s\n", user, popb->remote_host);
meillo@10: 		}
meillo@0: 	}
meillo@10: 	if (!ok) {
meillo@10: 		logwrite(LOG_ALERT | LOG_VERBOSE, "pop3 failed, error = %d\n", popb->error);
meillo@10: 	}
meillo@0: 
meillo@10: 	while (num_children > 0) {
meillo@10: 		int status;
meillo@10: 		pid_t pid;
meillo@10: 		if ((pid = wait(&status)) > 0) {
meillo@10: 			num_children--;
meillo@10: 			if (WEXITSTATUS(status) != EXIT_SUCCESS)
meillo@10: 				logwrite(LOG_WARNING, "delivery process with pid %d returned %d\n", pid, WEXITSTATUS(status));
meillo@10: 			if (WIFSIGNALED(status))
meillo@10: 				logwrite(LOG_WARNING, "delivery process with pid %d got signal: %d\n", pid, WTERMSIG(status));
meillo@10: 		} else {
meillo@10: 			logwrite(LOG_WARNING, "wait got error: %s\n", strerror(errno));
meillo@10: 		}
meillo@10: 	}
meillo@0: 
meillo@10: 	return ok;
meillo@0: }
meillo@0: 
meillo@0: /* function just to log into a pop server,
meillo@0:    for pop_before_smtp (or is it smtp_after_pop?)
meillo@0: */
meillo@0: 
meillo@10: gboolean
meillo@10: pop3_login(gchar * host, gint port, GList * resolve_list, gchar * user, gchar * pass, guint flags)
meillo@0: {
meillo@10: 	gboolean ok = FALSE;
meillo@10: 	pop3_base *popb;
meillo@0: 
meillo@10: 	signal(SIGCHLD, SIG_IGN);
meillo@0: 
meillo@10: 	if ((popb = pop3_in_open(host, port, resolve_list, flags))) {
meillo@10: 		if (pop3_in_init(popb)) {
meillo@10: 			if (pop3_in_login(popb, user, pass))
meillo@10: 				ok = TRUE;
meillo@10: 			else
meillo@10: 				logwrite(LOG_ALERT | LOG_VERBOSE, "pop3 login failed for user %s, host = %s\n", user, host);
meillo@10: 		}
meillo@10: 		pop3_in_close(popb);
meillo@10: 	}
meillo@10: 	return ok;
meillo@0: }
meillo@0: 
meillo@0: #endif