GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/smtpd/smtpd/../forward.c Lines: 0 29 0.0 %
Date: 2017-11-13 Branches: 0 16 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: forward.c,v 1.39 2015/12/28 22:08:30 jung Exp $	*/
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/*
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 * Copyright (c) 2008 Gilles Chehade <gilles@poolp.org>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/tree.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <ctype.h>
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#include <event.h>
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#include <imsg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <util.h>
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#include <unistd.h>
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#include <limits.h>
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#include "smtpd.h"
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#include "log.h"
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#define	MAX_FORWARD_SIZE	(4 * 1024)
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#define	MAX_EXPAND_NODES	(100)
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int
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forwards_get(int fd, struct expand *expand)
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{
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	FILE	       *fp = NULL;
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	char	       *line = NULL;
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	size_t		len;
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	size_t		lineno;
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	size_t		save;
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	int		ret;
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	struct stat	sb;
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	ret = -1;
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	if (fstat(fd, &sb) == -1)
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		goto end;
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	/* if it's empty just pretend that no expansion took place */
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	if (sb.st_size == 0) {
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		log_info("info: forward file is empty");
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		ret = 0;
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		goto end;
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	}
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	/* over MAX_FORWARD_SIZE, temporarily fail */
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	if (sb.st_size >= MAX_FORWARD_SIZE) {
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		log_info("info: forward file exceeds max size");
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		goto end;
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	}
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	if ((fp = fdopen(fd, "r")) == NULL) {
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		log_warn("warn: fdopen failure in forwards_get()");
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		goto end;
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	}
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	lineno = 0;
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	save = expand->nb_nodes;
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	while ((line = fparseln(fp, &len, &lineno, NULL, 0)) != NULL) {
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		if (!expand_line(expand, line, 0)) {
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			log_info("info: parse error in forward file");
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			goto end;
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		}
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		if (expand->nb_nodes > MAX_EXPAND_NODES) {
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			log_info("info: forward file expanded too many nodes");
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			goto end;
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		}
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		free(line);
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	}
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	ret = expand->nb_nodes > save ? 1 : 0;
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end:
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	free(line);
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	if (fp)
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		fclose(fp);
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	else
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		close(fd);
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	return ret;
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}