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/* $OpenBSD: config.c,v 1.32 2015/01/16 06:40:20 deraadt 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/socket.h>
#include <sys/resource.h>
#include <event.h>
#include <imsg.h>
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <string.h>
#include <unistd.h>
#include <openssl/ssl.h>
#include "smtpd.h"
#include "log.h"
#include "ssl.h"
extern int profiling;
static int pipes[PROC_COUNT][PROC_COUNT];
void
purge_config(uint8_t what)
{
struct listener *l;
struct table *t;
struct rule *r;
struct pki *p;
const char *k;
void *iter_dict;
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_TABLES) {
while (dict_root(env->sc_tables_dict, NULL, (void **)&t))
table_destroy(t);
free(env->sc_tables_dict);
env->sc_tables_dict = 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_PKI) {
while (dict_poproot(env->sc_pki_dict, (void **)&p)) {
explicit_bzero(p->pki_cert, p->pki_cert_len);
free(p->pki_cert);
if (p->pki_key) {
explicit_bzero(p->pki_key, p->pki_key_len);
free(p->pki_key);
}
if (p->pki_pkey)
EVP_PKEY_free(p->pki_pkey);
free(p);
}
free(env->sc_pki_dict);
env->sc_pki_dict = NULL;
} else if (what & PURGE_PKI_KEYS) {
iter_dict = NULL;
while (dict_iter(env->sc_pki_dict, &iter_dict, &k,
(void **)&p)) {
explicit_bzero(p->pki_cert, p->pki_cert_len);
free(p->pki_cert);
p->pki_cert = NULL;
if (p->pki_key) {
explicit_bzero(p->pki_key, p->pki_key_len);
free(p->pki_key);
p->pki_key = NULL;
}
if (p->pki_pkey)
EVP_PKEY_free(p->pki_pkey);
p->pki_pkey = NULL;
}
}
}
void
init_pipes(void)
{
int i, j, sockpair[2];
for (i = 0; i < PROC_COUNT; i++)
for (j = i + 1; j < PROC_COUNT; j++) {
if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC,
sockpair) == -1)
fatal("socketpair");
pipes[i][j] = sockpair[0];
pipes[j][i] = sockpair[1];
session_socket_blockmode(pipes[i][j], BM_NONBLOCK);
session_socket_blockmode(pipes[j][i], BM_NONBLOCK);
}
}
void
config_process(enum smtp_proc_type proc)
{
struct rlimit rl;
smtpd_process = proc;
setproctitle("%s", proc_title(proc));
if (getrlimit(RLIMIT_NOFILE, &rl) == -1)
fatal("fdlimit: getrlimit");
rl.rlim_cur = rl.rlim_max;
if (setrlimit(RLIMIT_NOFILE, &rl) == -1)
fatal("fdlimit: setrlimit");
}
void
config_peer(enum smtp_proc_type proc)
{
struct mproc *p;
if (proc == smtpd_process)
fatal("config_peers: cannot peer with oneself");
p = xcalloc(1, sizeof *p, "config_peer");
p->proc = proc;
p->name = xstrdup(proc_name(proc), "config_peer");
p->handler = imsg_dispatch;
mproc_init(p, pipes[smtpd_process][proc]);
mproc_enable(p);
pipes[smtpd_process][proc] = -1;
if (proc == PROC_CONTROL)
p_control = p;
else if (proc == PROC_LKA)
p_lka = p;
else if (proc == PROC_PARENT)
p_parent = p;
else if (proc == PROC_QUEUE)
p_queue = p;
else if (proc == PROC_SCHEDULER)
p_scheduler = p;
else if (proc == PROC_PONY)
p_pony = p;
else if (proc == PROC_CA)
p_ca = p;
else
fatalx("bad peer");
}
static void process_stat_event(int, short, void *);
void
config_done(void)
{
static struct event ev;
struct timeval tv;
unsigned int i, j;
for (i = 0; i < PROC_COUNT; i++) {
for (j = 0; j < PROC_COUNT; j++) {
if (i == j || pipes[i][j] == -1)
continue;
close(pipes[i][j]);
pipes[i][j] = -1;
}
}
if (smtpd_process == PROC_CONTROL)
return;
if (!(profiling & PROFILE_BUFFERS))
return;
evtimer_set(&ev, process_stat_event, &ev);
tv.tv_sec = 0;
tv.tv_usec = 0;
evtimer_add(&ev, &tv);
}
static void
process_stat(struct mproc *p)
{
char buf[1024];
struct stat_value value;
if (p == NULL)
return;
value.type = STAT_COUNTER;
(void)snprintf(buf, sizeof buf, "buffer.%s.%s",
proc_name(smtpd_process),
proc_name(p->proc));
value.u.counter = p->bytes_queued_max;
p->bytes_queued_max = p->bytes_queued;
stat_set(buf, &value);
}
static void
process_stat_event(int fd, short ev, void *arg)
{
struct event *e = arg;
struct timeval tv;
process_stat(p_control);
process_stat(p_lka);
process_stat(p_parent);
process_stat(p_queue);
process_stat(p_scheduler);
process_stat(p_pony);
process_stat(p_ca);
tv.tv_sec = 1;
tv.tv_usec = 0;
evtimer_add(e, &tv);
}
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