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/* $OpenBSD: store.c,v 1.9 2009/01/01 16:15:47 jacekm Exp $ */
/*
* Copyright (c) 2008 Gilles Chehade <gilles@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/tree.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <event.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "smtpd.h"
int file_copy(FILE *, FILE *, size_t);
int file_append(FILE *, FILE *);
int
file_copy(FILE *dest, FILE *src, size_t len)
{
char buffer[8192];
size_t rlen;
for (; len;) {
rlen = len < sizeof(buffer) ? len : sizeof(buffer);
if (fread(buffer, 1, rlen, src) != rlen)
return 0;
if (fwrite(buffer, 1, rlen, dest) != rlen)
return 0;
len -= rlen;
}
return 1;
}
int
file_append(FILE *dest, FILE *src)
{
struct stat sb;
size_t srcsz;
if (fstat(fileno(src), &sb) == -1)
return 0;
srcsz = sb.st_size;
if (! file_copy(dest, src, srcsz))
return 0;
return 1;
}
int
store_write_header(struct batch *batchp, struct message *messagep, FILE *fp)
{
time_t tm;
char timebuf[26]; /* current time */
char ctimebuf[26]; /* creation time */
void *p;
char addrbuf[INET6_ADDRSTRLEN];
tm = time(NULL);
ctime_r(&tm, timebuf);
timebuf[strcspn(timebuf, "\n")] = '\0';
tm = time(&messagep->creation);
ctime_r(&tm, ctimebuf);
ctimebuf[strcspn(ctimebuf, "\n")] = '\0';
if (messagep->session_ss.ss_family == PF_INET) {
struct sockaddr_in *ssin = (struct sockaddr_in *)&messagep->session_ss;
p = &ssin->sin_addr.s_addr;
}
if (messagep->session_ss.ss_family == PF_INET6) {
struct sockaddr_in6 *ssin6 = (struct sockaddr_in6 *)&messagep->session_ss;
p = &ssin6->sin6_addr.s6_addr;
}
bzero(addrbuf, sizeof (addrbuf));
inet_ntop(messagep->session_ss.ss_family, p, addrbuf, sizeof (addrbuf));
if (batchp->type & T_DAEMON_BATCH) {
if (fprintf(fp, "From %s@%s %s\n", "MAILER-DAEMON",
batchp->env->sc_hostname, timebuf) == -1) {
return 0;
}
if (fprintf(fp, "Received: from %s (%s [%s%s])\n"
"\tby %s with ESMTP id %s\n"
"\tfor <%s@%s>; %s\n\n",
messagep->session_helo, messagep->session_hostname,
messagep->session_ss.ss_family == PF_INET ? "" : "IPv6:", addrbuf,
batchp->env->sc_hostname, messagep->message_id,
messagep->sender.user, messagep->sender.domain, ctimebuf) == -1) {
return 0;
}
return 1;
}
if (fprintf(fp, "From %s@%s %s\n"
"Received: from %s (%s [%s%s])\n"
"\tby %s with ESMTP id %s\n"
"\tfor <%s@%s>; %s\n",
messagep->sender.user, messagep->sender.domain, timebuf,
messagep->session_helo, messagep->session_hostname,
messagep->session_ss.ss_family == PF_INET ? "" : "IPv6:", addrbuf,
batchp->env->sc_hostname, batchp->message_id,
messagep->recipient.user, messagep->recipient.domain, ctimebuf) == -1) {
return 0;
}
return 1;
}
int
store_write_daemon(struct batch *batchp, struct message *messagep)
{
u_int32_t i;
struct message *recipient;
FILE *mboxfp;
FILE *messagefp;
mboxfp = fdopen(messagep->mboxfd, "a");
if (mboxfp == NULL)
return 0;
messagefp = fdopen(messagep->messagefd, "r");
if (messagefp == NULL)
goto bad;
if (! store_write_header(batchp, messagep, mboxfp))
goto bad;
if (fprintf(mboxfp, "Hi !\n\n"
"This is the MAILER-DAEMON, please DO NOT REPLY to this e-mail it is\n"
"just a notification to let you know that an error has occurred.\n\n") == -1)
goto bad;
if ((batchp->status & S_BATCH_PERMFAILURE) && fprintf(mboxfp,
"You ran into a PERMANENT FAILURE, which means that the e-mail can't\n"
"be delivered to the remote host no matter how much I try.\n\n"
"Diagnostic:\n"
"%s\n\n", batchp->errorline) == -1)
goto bad;
if ((batchp->status & S_BATCH_TEMPFAILURE) && fprintf(mboxfp,
"You ran into a TEMPORARY FAILURE, which means that the e-mail can't\n"
"be delivered right now, but could be deliverable at a later time. I\n"
"will attempt until it succeeds for the next four days, then let you\n"
"know if it didn't work out.\n\n"
"Diagnostic:\n"
"%s\n\n", batchp->errorline) == -1)
goto bad;
if (! (batchp->status & S_BATCH_TEMPFAILURE)) {
/* First list the temporary failures */
i = 0;
TAILQ_FOREACH(recipient, &batchp->messages, entry) {
if (recipient->status & S_MESSAGE_TEMPFAILURE) {
if (i == 0) {
if (fprintf(mboxfp,
"The following recipients caused a temporary failure:\n") == -1)
goto bad;
++i;
}
if (fprintf(mboxfp,
"\t<%s@%s>:\n%s\n\n", recipient->recipient.user, recipient->recipient.domain,
recipient->session_errorline) == -1)
goto bad;
}
}
/* Then list the permanent failures */
i = 0;
TAILQ_FOREACH(recipient, &batchp->messages, entry) {
if (recipient->status & S_MESSAGE_PERMFAILURE) {
if (i == 0) {
if (fprintf(mboxfp,
"The following recipients caused a permanent failure:\n") == -1)
goto bad;
++i;
}
if (fprintf(mboxfp,
"\t<%s@%s>:\n%s\n\n", recipient->recipient.user, recipient->recipient.domain,
recipient->session_errorline) == -1)
goto bad;
}
}
}
if (fprintf(mboxfp, "Below is a copy of the original message:\n\n") == -1)
goto bad;
if (! file_append(mboxfp, messagefp))
goto bad;
if (fprintf(mboxfp, "\n") == -1)
goto bad;
fflush(mboxfp);
fsync(fileno(mboxfp));
fclose(mboxfp);
fclose(messagefp);
return 1;
bad:
if (mboxfp != NULL)
fclose(mboxfp);
if (messagefp != NULL)
fclose(messagefp);
return 0;
}
int
store_write_message(struct batch *batchp, struct message *messagep)
{
FILE *mboxfp;
FILE *messagefp;
mboxfp = fdopen(messagep->mboxfd, "a");
if (mboxfp == NULL)
return 0;
messagefp = fdopen(messagep->messagefd, "r");
if (messagefp == NULL)
goto bad;
if (! store_write_header(batchp, messagep, mboxfp))
goto bad;
if (! file_append(mboxfp, messagefp))
goto bad;
if (fprintf(mboxfp, "\n") == -1)
goto bad;
fflush(mboxfp);
fsync(fileno(mboxfp));
fclose(mboxfp);
fclose(messagefp);
return 1;
bad:
if (mboxfp != NULL)
fclose(mboxfp);
if (messagefp != NULL)
fclose(messagefp);
return 0;
}
int
store_message(struct batch *batchp, struct message *messagep,
int (*writer)(struct batch *, struct message *))
{
struct stat sb;
if (fstat(messagep->mboxfd, &sb) == -1)
return 0;
if (! writer(batchp, messagep)) {
if (S_ISREG(sb.st_mode)) {
ftruncate(messagep->mboxfd, sb.st_size);
return 0;
}
return 0;
}
return 1;
}
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