meillo@367: /*
meillo@367: **  MasqMail
meillo@367: **  Copyright (C) 1999-2001 Oliver Kurth
meillo@367: **  Copyright (C) 2010 markus schnalke <meillo@marmaro.de>
meillo@367: **
meillo@367: **  This program is free software; you can redistribute it and/or modify
meillo@367: **  it under the terms of the GNU General Public License as published by
meillo@367: **  the Free Software Foundation; either version 2 of the License, or
meillo@367: **  (at your option) any later version.
meillo@367: **
meillo@367: **  This program is distributed in the hope that it will be useful,
meillo@367: **  but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@367: **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
meillo@367: **  GNU General Public License for more details.
meillo@367: **
meillo@367: **  You should have received a copy of the GNU General Public License
meillo@367: **  along with this program; if not, write to the Free Software
meillo@367: **  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
meillo@0: */
meillo@0: 
meillo@0: #include "masqmail.h"
meillo@0: #include "readsock.h"
meillo@0: 
meillo@299: /* must match PROT_* in masqmail.h */
meillo@10: gchar *prot_names[] = {
meillo@10: 	"local",
meillo@299: 	"SMTP",
meillo@299: 	"ESMTP",
meillo@10: 	"(unknown)"  /* should not happen, but better than crashing. */
meillo@0: };
meillo@0: 
meillo@10: static gchar*
meillo@366: string_base62(gchar *res, guint value, gchar len)
meillo@0: {
meillo@388: 	static gchar base62_chars[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
meillo@388: 			"abcdefghijklmnopqrstuvwxyz";
meillo@10: 	gchar *p = res + len;
meillo@14: 	*p = '\0';
meillo@10: 	while (p > res) {
meillo@10: 		*(--p) = base62_chars[value % 62];
meillo@10: 		value /= 62;
meillo@10: 	}
meillo@10: 	return res;
meillo@0: }
meillo@0: 
meillo@367: /*
meillo@367: **  accept message from anywhere.
meillo@367: **  A message from local is indicated by msg->recieved_host == NULL
meillo@367: **
meillo@367: **  The -t option: With the ACC_RCPT_FROM_HEAD flag the addrs found found
meillo@367: **  in To/Cc/Bcc headers are added to the recipient list.
meillo@0: */
meillo@10: accept_error
meillo@366: accept_message_stream(FILE *in, message *msg, guint flags)
meillo@0: {
meillo@10: 	gchar *line, *line1;
meillo@10: 	int line_size = MAX_DATALINE;
meillo@10: 	gboolean in_headers = TRUE;
meillo@10: 	header *hdr = NULL;
meillo@10: 	gint line_cnt = 0, data_size = 0;
meillo@0: 
meillo@10: 	line = g_malloc(line_size);
meillo@388: 	*line = '\0';
meillo@0: 
meillo@388: 	while (1) {
meillo@388: 		int len = read_sockline1(in, &line, &line_size, 5 * 60,
meillo@388: 				READSOCKL_CVT_CRLF);
meillo@10: 		line1 = line;
meillo@0: 
meillo@388: 		if ((*line == '.') && (!(flags & ACC_DOT_IGNORE))) {
meillo@10: 			if (line[1] == '\n') {
meillo@10: 				g_free(line);
meillo@10: 				break;
meillo@10: 			}
meillo@10: 			line1++;
meillo@10: 		}
meillo@10: 
meillo@388: 		if (len==-1 && (flags & (ACC_DOT_IGNORE | ACC_NODOT_RELAX))) {
meillo@388: 			/* at EOF but last line was not terminated by CR */
meillo@388: 			/* some MUAs allow unterminated lines */
meillo@270: 			gint len1 = strlen(line1);
meillo@388: 			if (len1 > 0 && line1[len1-1] != '\n') {
meillo@388: 				line1[len1] = '\n';
meillo@388: 				line1[len1+1] = '\0';
meillo@388: 				msg->data_list = g_list_prepend(msg->data_list,
meillo@388: 						g_strdup(line1));
meillo@388: 				data_size += strlen(line1);
meillo@388: 				line_cnt++;
meillo@270: 			}
meillo@270: 			break;
meillo@270: 
meillo@270: 		} else if (len == -1) {
meillo@270: 			g_free(line);
meillo@270: 			return AERR_EOF;
meillo@270: 
meillo@270: 		} else if (len == -2) {
meillo@270: 			/* should not happen any more */
meillo@270: 			g_free(line);
meillo@270: 			return AERR_OVERFLOW;
meillo@270: 
meillo@270: 		} else if (len == -3) {
meillo@270: 			g_free(line);
meillo@270: 			return AERR_TIMEOUT;
meillo@270: 
meillo@270: 		} else if (len <= 0) {
meillo@270: 			/* does not happen */
meillo@270: 			g_free(line);
meillo@270: 			DEBUG(5) debugf("read_sockline returned %d\n", len);
meillo@270: 			return AERR_UNKNOWN;
meillo@270: 
meillo@270: 		}
meillo@270: 
meillo@270: 		if (in_headers) {
meillo@270: 			/* some pop servers send the 'From ' line, skip it: */
meillo@388: 			if (!msg->hdr_list && strncmp(line1, "From ", 5)==0) {
meillo@270: 				continue;
meillo@270: 			}
meillo@270: 
meillo@388: 			if (*line1 == ' ' || *line1 == '\t') {
meillo@270: 				/* continuation of 'folded' header: */
meillo@270: 				if (hdr) {
meillo@366: 					char *cp;
meillo@388: 					cp = g_strconcat(hdr->header, line1,
meillo@388: 							NULL);
meillo@388: 					hdr->value = cp + (hdr->value -
meillo@388: 							hdr->header);
meillo@323: 					free(hdr->header);
meillo@323: 					hdr->header = cp;
meillo@270: 				}
meillo@388: 			} else if (*line1 == '\n') {
meillo@270: 				/* an empty line marks end of headers */
meillo@270: 				in_headers = FALSE;
meillo@388: 
meillo@388: 			} else if ((hdr = get_header(line1))) {
meillo@388: 				/* another header */
meillo@388: 				msg->hdr_list = g_list_append(msg->hdr_list, hdr);
meillo@10: 			} else {
meillo@388: 				/*
meillo@388: 				**  Should be another header but none was
meillo@388: 				**  recognized, so this seems to be the first
meillo@388: 				**  data line of a broken mailer which does
meillo@388: 				**  not add an empty line after the headers.
meillo@388: 				*/
meillo@388: 				in_headers = FALSE;
meillo@388: 				msg->data_list = g_list_prepend(msg->data_list,
meillo@388: 						g_strdup(line1));
meillo@10: 			}
meillo@10: 		} else {
meillo@270: 			/* message body */
meillo@388: 			msg->data_list = g_list_prepend(msg->data_list,
meillo@388: 					g_strdup(line1));
meillo@270: 			data_size += strlen(line1);
meillo@270: 			line_cnt++;
meillo@270: 		}
meillo@10: 
meillo@120: 		if (conf.max_msg_size && (data_size > conf.max_msg_size)) {
meillo@117: 			DEBUG(4) debugf("accept_message_stream(): "
meillo@117: 					"received %d bytes (conf.max_msg_size=%d)\n",
meillo@117: 			                data_size, conf.max_msg_size);
meillo@117: 			return AERR_SIZE;
meillo@117: 		}
meillo@0: 	}
meillo@388: 	DEBUG(4) debugf("received %d lines of data (%d bytes)\n",
meillo@388: 			line_cnt, data_size);
meillo@270: 
meillo@270: 	if (!msg->data_list) {
meillo@388: 		/* make sure data list is not NULL */
meillo@10: 		msg->data_list = g_list_append(NULL, g_strdup(""));
meillo@270: 	}
meillo@270: 	msg->data_list = g_list_reverse(msg->data_list);
meillo@0: 
meillo@388: 	/* we have succesfully received the mail data */
meillo@0: 
meillo@10: 	msg->data_size = data_size;
meillo@10: 	msg->received_time = time(NULL);
meillo@0: 
meillo@10: 	return AERR_OK;
meillo@0: }
meillo@0: 
meillo@388: static void
meillo@388: ensure_return_path(message *msg)
meillo@388: {
meillo@388: 	GList *hdr_list;
meillo@388: 	header *hdr;
meillo@388: 	gchar *addr;
meillo@388: 
meillo@388: 	if (msg->return_path) {
meillo@388: 		return;
meillo@388: 	}
meillo@388: 
meillo@388: 	DEBUG(3) debugf("return_path == NULL\n");
meillo@388: 
meillo@388: 	hdr_list = find_header(msg->hdr_list, HEAD_SENDER, NULL);
meillo@388: 	if (!hdr_list) {
meillo@388: 		hdr_list = find_header(msg->hdr_list, HEAD_FROM, NULL);
meillo@388: 	}
meillo@388: 	if (hdr_list) {
meillo@388: 		hdr = (header *) (g_list_first(hdr_list)->data);
meillo@388: 
meillo@388: 		DEBUG(5) debugf("hdr->value = '%s'\n", hdr->value);
meillo@388: 
meillo@388: 		addr = g_strdup(hdr->value);
meillo@388: 		g_strchomp(addr);
meillo@388: 		msg->return_path = create_address_qualified(addr,
meillo@388: 				FALSE, msg->received_host);
meillo@388: 		if (msg->return_path) {
meillo@388: 			DEBUG(3) debugf("setting return_path to %s\n",
meillo@388: 					addr_string(msg->return_path));
meillo@388: 			msg->hdr_list = g_list_append(msg->hdr_list,
meillo@388: 					create_header(HEAD_UNKNOWN,
meillo@388: 					"X-Warning: return path set from %s "
meillo@388: 					"address\n",
meillo@388: 					(hdr->id == HEAD_SENDER) ?
meillo@388: 					"Sender:" : "From:"));
meillo@388: 		}
meillo@388: 		g_free(addr);
meillo@388: 	}
meillo@388: 	if (!msg->return_path) {
meillo@388: 		/* no Sender: or From: or create_address_qualified failed */
meillo@388: 		msg->return_path = create_address_qualified("postmaster",
meillo@388: 				TRUE, conf.host_name);
meillo@388: 		DEBUG(3) debugf("setting return_path to %s\n",
meillo@388: 				addr_string(msg->return_path));
meillo@388: 		msg->hdr_list = g_list_append(msg->hdr_list,
meillo@388: 				create_header(HEAD_UNKNOWN,
meillo@388: 				"X-Warning: real return path is unknown\n"));
meillo@388: 	}
meillo@388: }
meillo@388: 
meillo@388: static accept_error
meillo@388: scan_headers(message *msg, guint flags)
meillo@388: {
meillo@388: 	gboolean has_id = FALSE;
meillo@388: 	gboolean has_date = FALSE;
meillo@388: 	gboolean has_sender = FALSE;
meillo@388: 	gboolean has_from = FALSE;
meillo@388: 	gboolean has_to_or_cc = FALSE;
meillo@388: 	GList *hdr_node, *hdr_node_next;
meillo@388: 	header *hdr;
meillo@388: 
meillo@388: 	for (hdr_node = g_list_first(msg->hdr_list); hdr_node;
meillo@388: 			hdr_node = hdr_node_next) {
meillo@388: 		hdr_node_next = g_list_next(hdr_node);
meillo@388: 		hdr = ((header *) (hdr_node->data));
meillo@388: 		DEBUG(5) debugf("scanning headers: %s", hdr->header);
meillo@388: 		switch (hdr->id) {
meillo@388: 		case HEAD_MESSAGE_ID:
meillo@388: 			has_id = TRUE;
meillo@388: 			break;
meillo@388: 		case HEAD_DATE:
meillo@388: 			has_date = TRUE;
meillo@388: 			break;
meillo@388: 		case HEAD_FROM:
meillo@388: 			has_from = TRUE;
meillo@388: 			break;
meillo@388: 		case HEAD_SENDER:
meillo@388: 			has_sender = TRUE;
meillo@388: 			break;
meillo@388: 		case HEAD_TO:
meillo@388: 		case HEAD_CC:
meillo@388: 			has_to_or_cc = TRUE;
meillo@388: 			/* fall through */
meillo@388: 		case HEAD_BCC:
meillo@388: 			if (flags & ACC_RCPT_FROM_HEAD) {
meillo@388: 				/* -t option (see comment above) */
meillo@388: 				DEBUG(5) debugf("hdr->value = %s\n",
meillo@388: 						hdr->value);
meillo@388: 				if (hdr->value) {
meillo@388: 					msg->rcpt_list = addr_list_append_rfc822(msg->rcpt_list, hdr->value, conf.host_name);
meillo@388: 				}
meillo@388: 			}
meillo@388: 			if (hdr->id == HEAD_BCC) {
meillo@388: 				DEBUG(3) debugf("removing 'Bcc' header\n");
meillo@388: 				msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);
meillo@388: 				g_list_free_1(hdr_node);
meillo@388: 				destroy_header(hdr);
meillo@388: 			}
meillo@388: 			break;
meillo@388: 		case HEAD_ENVELOPE_TO:
meillo@388: 			if (flags & ACC_SAVE_ENVELOPE_TO) {
meillo@388: 				DEBUG(3) debugf("creating 'X-Orig-Envelope-To' header\n");
meillo@388: 				msg->hdr_list = g_list_prepend(msg->hdr_list,
meillo@388: 						create_header(HEAD_UNKNOWN,
meillo@388: 						"X-Orig-Envelope-To: %s",
meillo@388: 						hdr->value));
meillo@388: 			}
meillo@388: 			DEBUG(3) debugf("removing 'Envelope-To' header\n");
meillo@388: 			msg->hdr_list = g_list_remove_link(msg->hdr_list,
meillo@388: 					hdr_node);
meillo@388: 			g_list_free_1(hdr_node);
meillo@388: 			destroy_header(hdr);
meillo@388: 			break;
meillo@388: 		case HEAD_RETURN_PATH:
meillo@388: 			if (flags & ACC_MAIL_FROM_HEAD) {
meillo@388: 				/* usually POP3 accept */
meillo@388: 				msg->return_path = create_address_qualified(hdr->value, TRUE, msg->received_host);
meillo@388: 				DEBUG(3) debugf("setting return_path to %s\n",
meillo@388: 						addr_string(msg->return_path));
meillo@388: 			}
meillo@388: 			DEBUG(3) debugf("removing 'Return-Path' header\n");
meillo@388: 			msg->hdr_list = g_list_remove_link(msg->hdr_list,
meillo@388: 					hdr_node);
meillo@388: 			g_list_free_1(hdr_node);
meillo@388: 			destroy_header(hdr);
meillo@388: 			break;
meillo@388: 		default:
meillo@388: 			break;  /* make compiler happy */
meillo@388: 		}
meillo@388: 	}
meillo@388: 
meillo@388: 	/*
meillo@388: 	**  TODO: do we still need this as we don't fetch
meillo@388: 	**        mail anymore?
meillo@388: 	**  This can happen for pop3 accept only and if no
meillo@388: 	**  Return-Path: header was given
meillo@388: 	*/
meillo@388: 	ensure_return_path(msg);
meillo@388: 
meillo@388: 	/* here we should have our recipients, fail if not: */
meillo@388: 	if (!msg->rcpt_list) {
meillo@388: 		logwrite(LOG_WARNING, "no recipients found in message\n");
meillo@388: 		return AERR_NORCPT;
meillo@388: 	}
meillo@388: 
meillo@388: 	if (!has_sender && !has_from) {
meillo@388: 		DEBUG(3) debugf("adding 'From:' header\n");
meillo@388: 		if (msg->full_sender_name) {
meillo@388: 			msg->hdr_list = g_list_append(msg->hdr_list,
meillo@388: 					create_header(HEAD_FROM,
meillo@388: 					"From: \"%s\" <%s@%s>\n",
meillo@388: 					msg->full_sender_name,
meillo@388: 					msg->return_path->local_part,
meillo@388: 					msg->return_path->domain));
meillo@388: 		} else {
meillo@388: 			msg->hdr_list = g_list_append(msg->hdr_list,
meillo@388: 					create_header(HEAD_FROM,
meillo@388: 					"From: <%s@%s>\n",
meillo@388: 					msg->return_path->local_part,
meillo@388: 					msg->return_path->domain));
meillo@388: 		}
meillo@388: 	}
meillo@388: 	if (!has_to_or_cc) {
meillo@388: 		DEBUG(3) debugf("no To: or Cc: header, hence adding "
meillo@388: 				"`To: undisclosed recipients:;'\n");
meillo@388: 		msg->hdr_list = g_list_append(msg->hdr_list,
meillo@388: 				create_header(HEAD_TO,
meillo@388: 				"To: undisclosed-recipients:;\n"));
meillo@388: 	}
meillo@388: 	if (!has_date) {
meillo@388: 		DEBUG(3) debugf("adding 'Date:' header\n");
meillo@388: 		msg->hdr_list = g_list_append(msg->hdr_list,
meillo@388: 				create_header(HEAD_DATE, "Date: %s\n",
meillo@388: 				rec_timestamp()));
meillo@388: 	}
meillo@388: 	if (!has_id) {
meillo@388: 		DEBUG(3) debugf("adding 'Message-ID:' header\n");
meillo@388: 		msg->hdr_list = g_list_append(msg->hdr_list,
meillo@388: 				create_header(HEAD_MESSAGE_ID,
meillo@388: 				"Message-ID: <%s@%s>\n",
meillo@388: 				msg->uid, conf.host_name));
meillo@388: 	}
meillo@388: 
meillo@388: 	return AERR_OK;
meillo@388: }
meillo@388: 
meillo@388: static void
meillo@388: add_received_hdr(message *msg)
meillo@388: {
meillo@388: 	gchar *for_string = NULL;
meillo@388: 	header *hdr = NULL;
meillo@388: 	address *addr;
meillo@388: 
meillo@388: 	DEBUG(3) debugf("adding 'Received:' header\n");
meillo@388: 	if (g_list_length(msg->rcpt_list) == 1) {
meillo@388: 		/* The `for' part only if exactly one rcpt is present */
meillo@388: 		addr = (address *) (g_list_first(msg->rcpt_list)->data);
meillo@388: 		for_string = g_strdup_printf("\n\tfor %s", addr_string(addr));
meillo@388: 	}
meillo@388: 	if (!msg->received_host) {
meillo@388: 		/* received locally */
meillo@388: 		hdr = create_header(HEAD_RECEIVED,
meillo@388: 				"Received: by %s (%s %s, from userid %d)\n"
meillo@388: 				"\tid %s%s; %s\n",
meillo@388: 				conf.host_name, PACKAGE, VERSION, geteuid(),
meillo@388: 				msg->uid,
meillo@388: 				for_string ? for_string : "", rec_timestamp());
meillo@388: 	} else {
meillo@388: 		/* received from remote */
meillo@388: 		DEBUG(5) debugf("adding 'Received:' header (5)\n");
meillo@388: 		hdr = create_header(HEAD_RECEIVED,
meillo@388: 				"Received: from %s\n"
meillo@388: 				"\tby %s with %s (%s %s)\n"
meillo@388: 				"\tid %s%s; %s\n",
meillo@388: 				msg->received_host, conf.host_name,
meillo@388: 				prot_names[msg->received_prot], PACKAGE,
meillo@388: 				VERSION, msg->uid,
meillo@388: 				for_string ? for_string : "", rec_timestamp());
meillo@388: 	}
meillo@388: 	msg->hdr_list = g_list_prepend(msg->hdr_list, hdr);
meillo@388: 	if (for_string) {
meillo@388: 		g_free(for_string);
meillo@388: 	}
meillo@388: }
meillo@388: 
meillo@10: accept_error
meillo@366: accept_message_prepare(message *msg, guint flags)
meillo@0: {
meillo@10: 	DEBUG(5) debugf("accept_message_prepare()\n");
meillo@0: 
meillo@388: 	/* generate unique message id */
meillo@10: 	msg->uid = g_malloc(14);
meillo@388: 	string_base62(msg->uid, time(NULL), 6);
meillo@10: 	msg->uid[6] = '-';
meillo@298: 	string_base62(msg->uid + 7, getpid(), 3);
meillo@10: 	msg->uid[10] = '-';
meillo@298: 	string_base62(msg->uid + 11, msg->transfer_id, 2);
meillo@298: 	msg->uid[13] = '\0';
meillo@0: 
meillo@298: 	/* if local, get password entry and set return path if missing */
meillo@298: 	if (!msg->received_host) {
meillo@388: 		struct passwd *passwd = NULL;
meillo@388: 
meillo@10: 		passwd = g_memdup(getpwuid(geteuid()), sizeof(struct passwd));
meillo@10: 		msg->ident = g_strdup(passwd->pw_name);
meillo@298: 		if (!msg->return_path) {
meillo@388: 			gchar *path = g_strdup_printf("<%s@%s>",
meillo@388: 					passwd->pw_name, conf.host_name);
meillo@388: 			DEBUG(3) debugf("setting return_path for local "
meillo@388: 					"accept: %s\n", path);
meillo@298: 			msg->return_path = create_address(path, TRUE);
meillo@298: 			g_free(path);
meillo@298: 		}
meillo@10: 	}
meillo@0: 
meillo@388: 	if (scan_headers(msg, flags) == AERR_NORCPT) {
meillo@388: 		return AERR_NORCPT;
meillo@0: 	}
meillo@10: 
meillo@388: 	/* after the hdrs are scanned because we need to know the rcpts */
meillo@388: 	add_received_hdr(msg);
meillo@0: 
meillo@10: 	return AERR_OK;
meillo@0: }
meillo@0: 
meillo@10: accept_error
meillo@366: accept_message(FILE *in, message *msg, guint flags)
meillo@0: {
meillo@10: 	accept_error err;
meillo@0: 
meillo@10: 	err = accept_message_stream(in, msg, flags);
meillo@270: 	if (err == AERR_OK) {
meillo@10: 		err = accept_message_prepare(msg, flags);
meillo@270: 	}
meillo@0: 
meillo@10: 	return err;
meillo@0: }