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/* $OpenBSD: config.c,v 1.12 2010/05/27 15:36:04 gilles Exp $ */
/*
* Copyright (c) 2008 Pierre-Yves Ritschard <pyr@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 <event.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "smtpd.h"
int is_peer(struct peer *, enum smtp_proc_type, u_int);
int
is_peer(struct peer *p, enum smtp_proc_type peer, u_int peercount)
{
u_int i;
for (i = 0; i < peercount; i++)
if (p[i].id == peer)
return (1);
return (0);
}
void
unconfigure(struct smtpd *env)
{
}
void
configure(struct smtpd *env)
{
}
void
purge_config(struct smtpd *env, u_int8_t what)
{
struct listener *l;
struct map *m;
struct rule *r;
struct ssl *s;
struct mapel *me;
if (what & PURGE_LISTENERS) {
while ((l = TAILQ_FIRST(env->sc_listeners)) != NULL) {
TAILQ_REMOVE(env->sc_listeners, l, entry);
free(l);
}
free(env->sc_listeners);
env->sc_listeners = NULL;
}
if (what & PURGE_MAPS) {
while ((m = TAILQ_FIRST(env->sc_maps)) != NULL) {
TAILQ_REMOVE(env->sc_maps, m, m_entry);
while ((me = TAILQ_FIRST(&m->m_contents))) {
TAILQ_REMOVE(&m->m_contents, me, me_entry);
free(me);
}
free(m);
}
free(env->sc_maps);
env->sc_maps = NULL;
}
if (what & PURGE_RULES) {
while ((r = TAILQ_FIRST(env->sc_rules)) != NULL) {
TAILQ_REMOVE(env->sc_rules, r, r_entry);
free(r);
}
free(env->sc_rules);
env->sc_rules = NULL;
}
if (what & PURGE_SSL) {
while ((s = SPLAY_ROOT(env->sc_ssl)) != NULL) {
SPLAY_REMOVE(ssltree, env->sc_ssl, s);
free(s->ssl_cert);
free(s->ssl_key);
free(s);
}
free(env->sc_ssl);
env->sc_ssl = NULL;
}
}
void
init_pipes(struct smtpd *env)
{
int i;
int j;
int count;
int sockpair[2];
for (i = 0; i < PROC_COUNT; i++)
for (j = 0; j < PROC_COUNT; j++) {
/*
* find out how many instances of this peer there are.
*/
if (i >= j || env->sc_instances[i] == 0||
env->sc_instances[j] == 0)
continue;
if (env->sc_instances[i] > 1 &&
env->sc_instances[j] > 1)
fatalx("N:N peering not supported");
count = env->sc_instances[i] * env->sc_instances[j];
if ((env->sc_pipes[i][j] =
calloc(count, sizeof(int))) == NULL ||
(env->sc_pipes[j][i] =
calloc(count, sizeof(int))) == NULL)
fatal(NULL);
while (--count >= 0) {
if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC,
sockpair) == -1)
fatal("socketpair");
env->sc_pipes[i][j][count] = sockpair[0];
env->sc_pipes[j][i][count] = sockpair[1];
session_socket_blockmode(
env->sc_pipes[i][j][count],
BM_NONBLOCK);
session_socket_blockmode(
env->sc_pipes[j][i][count],
BM_NONBLOCK);
}
}
}
void
config_pipes(struct smtpd *env, struct peer *p, u_int peercount)
{
u_int i;
u_int j;
int count;
/*
* close pipes
*/
for (i = 0; i < PROC_COUNT; i++) {
for (j = 0; j < PROC_COUNT; j++) {
if (i == j ||
env->sc_instances[i] == 0 ||
env->sc_instances[j] == 0)
continue;
for (count = 0;
count < env->sc_instances[i]*env->sc_instances[j];
count++) {
if (i == smtpd_process &&
is_peer(p, j, peercount) &&
count == env->sc_instance)
continue;
if (i == smtpd_process &&
is_peer(p, j, peercount) &&
env->sc_instances[i] == 1)
continue;
close(env->sc_pipes[i][j][count]);
env->sc_pipes[i][j][count] = -1;
}
}
}
}
void
config_peers(struct smtpd *env, struct peer *p, u_int peercount)
{
int count;
u_int src;
u_int dst;
u_int i;
/*
* listen on appropriate pipes
*/
for (i = 0; i < peercount; i++) {
src = smtpd_process;
dst = p[i].id;
if (dst == smtpd_process)
fatal("config_peers: cannot peer with oneself");
if ((env->sc_ievs[dst] = calloc(env->sc_instances[dst],
sizeof(struct imsgev))) == NULL)
fatal("config_peers");
for (count = 0; count < env->sc_instances[dst]; count++) {
imsg_init(&(env->sc_ievs[dst][count].ibuf),
env->sc_pipes[src][dst][count]);
env->sc_ievs[dst][count].handler = p[i].cb;
env->sc_ievs[dst][count].events = EV_READ;
env->sc_ievs[dst][count].proc = dst;
env->sc_ievs[dst][count].data = &env->sc_ievs[dst][count];
env->sc_ievs[dst][count].env = env;
event_set(&(env->sc_ievs[dst][count].ev),
env->sc_ievs[dst][count].ibuf.fd,
env->sc_ievs[dst][count].events,
env->sc_ievs[dst][count].handler,
env->sc_ievs[dst][count].data);
event_add(&(env->sc_ievs[dst][count].ev), NULL);
}
}
}
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