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/* $OpenBSD: queue_backend.c,v 1.14 2011/11/15 23:06:39 gilles Exp $ */
/*
* Copyright (c) 2011 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/queue.h>
#include <sys/tree.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <ctype.h>
#include <event.h>
#include <imsg.h>
#include <libgen.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "smtpd.h"
#include "log.h"
static int envelope_validate(struct envelope *);
/* fsqueue backend */
int fsqueue_init(void);
int fsqueue_message(enum queue_kind, enum queue_op, u_int32_t *);
int fsqueue_envelope(enum queue_kind, enum queue_op , struct envelope *);
void *fsqueue_qwalk_new(enum queue_kind, u_int32_t);
int fsqueue_qwalk(void *, u_int64_t *);
void fsqueue_qwalk_close(void *);
struct queue_backend queue_backends[] = {
{ QT_FS,
fsqueue_init,
fsqueue_message,
fsqueue_envelope,
fsqueue_qwalk_new,
fsqueue_qwalk,
fsqueue_qwalk_close }
};
struct queue_backend *
queue_backend_lookup(enum queue_type type)
{
u_int8_t i;
for (i = 0; i < nitems(queue_backends); ++i)
if (queue_backends[i].type == type)
break;
if (i == nitems(queue_backends))
fatalx("invalid queue type");
return &queue_backends[i];
}
int
queue_message_create(enum queue_kind qkind, u_int32_t *msgid)
{
return env->sc_queue->message(qkind, QOP_CREATE, msgid);
}
int
queue_message_delete(enum queue_kind qkind, u_int32_t msgid)
{
return env->sc_queue->message(qkind, QOP_DELETE, &msgid);
}
int
queue_message_commit(enum queue_kind qkind, u_int32_t msgid)
{
return env->sc_queue->message(qkind, QOP_COMMIT, &msgid);
}
int
queue_message_purge(enum queue_kind qkind, u_int32_t msgid)
{
return env->sc_queue->message(qkind, QOP_PURGE, &msgid);
}
int
queue_message_corrupt(enum queue_kind qkind, u_int32_t msgid)
{
return env->sc_queue->message(qkind, QOP_CORRUPT, &msgid);
}
int
queue_message_fd_r(enum queue_kind qkind, u_int32_t msgid)
{
return env->sc_queue->message(qkind, QOP_FD_R, &msgid);
}
int
queue_message_fd_rw(enum queue_kind qkind, u_int32_t msgid)
{
return env->sc_queue->message(qkind, QOP_FD_RW, &msgid);
}
int
queue_envelope_create(enum queue_kind qkind, struct envelope *ep)
{
ep->id >>= 32;
return env->sc_queue->envelope(qkind, QOP_CREATE, ep);
}
int
queue_envelope_delete(enum queue_kind qkind, struct envelope *ep)
{
return env->sc_queue->envelope(qkind, QOP_DELETE, ep);
}
int
queue_envelope_load(enum queue_kind qkind, u_int64_t evpid, struct envelope *ep)
{
ep->id = evpid;
if (env->sc_queue->envelope(qkind, QOP_LOAD, ep))
return envelope_validate(ep);
return 0;
}
int
queue_envelope_update(enum queue_kind qkind, struct envelope *ep)
{
return env->sc_queue->envelope(qkind, QOP_UPDATE, ep);
}
void *
qwalk_new(enum queue_kind kind, u_int32_t msgid)
{
return env->sc_queue->qwalk_new(kind, msgid);
}
int
qwalk(void *hdl, u_int64_t *evpid)
{
return env->sc_queue->qwalk(hdl, evpid);
}
void
qwalk_close(void *hdl)
{
return env->sc_queue->qwalk_close(hdl);
}
u_int32_t
queue_generate_msgid(void)
{
u_int32_t msgid;
again:
msgid = arc4random_uniform(0xffffffff);
if (msgid == 0)
goto again;
return msgid;
}
u_int64_t
queue_generate_evpid(u_int32_t msgid)
{
u_int32_t rnd;
u_int64_t evpid;
again:
rnd = arc4random_uniform(0xffffffff);
if (rnd == 0)
goto again;
evpid = msgid;
evpid <<= 32;
evpid |= rnd;
return evpid;
}
/**/
static int
envelope_validate(struct envelope *ep)
{
if (ep->version != SMTPD_ENVELOPE_VERSION)
return 0;
if ((ep->id & 0xffffffff) == 0 ||
((ep->id >> 32) & 0xffffffff) == 0)
return 0;
if (ep->helo[0] == '\0')
return 0;
if (ep->hostname[0] == '\0')
return 0;
if (ep->errorline[0] != '\0') {
if (! isdigit(ep->errorline[0]) ||
! isdigit(ep->errorline[1]) ||
! isdigit(ep->errorline[2]) ||
ep->errorline[3] != ' ')
return 0;
}
return 1;
}
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