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/* Copyright (c) 2002-2018 Dovecot authors, see the included COPYING file */
#include "lmtp-common.h"
#include "ioloop.h"
#include "path-util.h"
#include "restrict-access.h"
#include "anvil-client.h"
#include "master-service.h"
#include "master-service-settings.h"
#include "master-interface.h"
#include "mail-deliver.h"
#include "mail-storage-service.h"
#include "smtp-submit-settings.h"
#include "lda-settings.h"
#include <unistd.h>
#define DNS_CLIENT_SOCKET_PATH "dns-client"
#define LMTP_MASTER_FIRST_LISTEN_FD 3
#define IS_STANDALONE() \
(getenv(MASTER_IS_PARENT_ENV) == NULL)
struct smtp_server *lmtp_server = NULL;
char *dns_client_socket_path, *base_dir;
struct mail_storage_service_ctx *storage_service;
struct anvil_client *anvil;
lmtp_client_created_func_t *hook_client_created = NULL;
struct event_category event_category_lmtp = {
.name = "lmtp",
};
lmtp_client_created_func_t *
lmtp_client_created_hook_set(lmtp_client_created_func_t *new_hook)
{
lmtp_client_created_func_t *old_hook = hook_client_created;
hook_client_created = new_hook;
return old_hook;
}
void lmtp_anvil_init(void)
{
if (anvil == NULL) {
const char *path = t_strdup_printf("%s/anvil", base_dir);
anvil = anvil_client_init(path, NULL, 0);
}
}
static void client_connected(struct master_service_connection *conn)
{
master_service_client_connection_accept(conn);
(void)client_create(conn->fd, conn->fd, conn);
}
static void drop_privileges(void)
{
struct restrict_access_settings set;
const char *error;
/* by default we don't drop any privileges, but keep running as root. */
restrict_access_get_env(&set);
/* open config connection before dropping privileges */
struct master_service_settings_input input;
struct master_service_settings_output output;
i_zero(&input);
input.module = "lmtp";
input.service = "lmtp";
if (master_service_settings_read(master_service,
&input, &output, &error) < 0)
i_fatal("Error reading configuration: %s", error);
restrict_access_by_env(RESTRICT_ACCESS_FLAG_ALLOW_ROOT, NULL);
}
static void main_init(void)
{
struct master_service_connection conn;
struct smtp_server_settings lmtp_set;
i_zero(&lmtp_set);
lmtp_set.protocol = SMTP_PROTOCOL_LMTP;
lmtp_set.auth_optional = TRUE;
lmtp_set.rcpt_domain_optional = TRUE;
lmtp_set.mail_path_allow_broken = TRUE;
lmtp_set.reason_code_module = "lmtp";
lmtp_server = smtp_server_init(&lmtp_set);
if (IS_STANDALONE()) {
i_zero(&conn);
(void)client_create(STDIN_FILENO, STDOUT_FILENO, &conn);
}
const char *error, *tmp_socket_path;
if (t_abspath(DNS_CLIENT_SOCKET_PATH, &tmp_socket_path, &error) < 0) {
i_fatal("t_abspath(%s) failed: %s", DNS_CLIENT_SOCKET_PATH, error);
}
dns_client_socket_path = i_strdup(tmp_socket_path);
mail_deliver_hooks_init();
}
static void main_deinit(void)
{
clients_destroy();
if (anvil != NULL)
anvil_client_deinit(&anvil);
i_free(dns_client_socket_path);
i_free(base_dir);
smtp_server_deinit(&lmtp_server);
}
int main(int argc, char *argv[])
{
const struct setting_parser_info *set_roots[] = {
&smtp_submit_setting_parser_info,
&lda_setting_parser_info,
&lmtp_setting_parser_info,
NULL
};
enum master_service_flags service_flags =
MASTER_SERVICE_FLAG_HAVE_STARTTLS;
enum mail_storage_service_flags storage_service_flags =
MAIL_STORAGE_SERVICE_FLAG_USERDB_LOOKUP |
MAIL_STORAGE_SERVICE_FLAG_TEMP_PRIV_DROP |
MAIL_STORAGE_SERVICE_FLAG_NO_IDLE_TIMEOUT;
const char *tmp_base_dir;
int c;
if (IS_STANDALONE()) {
service_flags |= MASTER_SERVICE_FLAG_STANDALONE |
MASTER_SERVICE_FLAG_STD_CLIENT;
} else {
service_flags |= MASTER_SERVICE_FLAG_KEEP_CONFIG_OPEN ;
}
master_service = master_service_init("lmtp", service_flags,
&argc, &argv, "D");
while ((c = master_getopt(master_service)) > 0) {
switch (c) {
case 'D':
storage_service_flags |=
MAIL_STORAGE_SERVICE_FLAG_ENABLE_CORE_DUMPS;
break;
default:
return FATAL_DEFAULT;
}
}
const char *error;
if (t_get_working_dir(&tmp_base_dir, &error) < 0)
i_fatal("Could not get working directory: %s", error);
base_dir = i_strdup(tmp_base_dir);
drop_privileges();
master_service_init_log_with_pid(master_service);
storage_service = mail_storage_service_init(master_service, set_roots,
storage_service_flags);
restrict_access_allow_coredumps(TRUE);
main_init();
master_service_init_finish(master_service);
master_service_run(master_service, client_connected);
main_deinit();
mail_storage_service_deinit(&storage_service);
master_service_deinit(&master_service);
return 0;
}
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