344 lines
10 KiB
C
344 lines
10 KiB
C
|
/*++
|
||
|
|
/* NAME
|
||
|
|
/* mail_params 3
|
||
|
|
/* SUMMARY
|
||
|
|
/* global mail configuration parameters
|
||
|
|
/* SYNOPSIS
|
||
|
|
/* #include <mail_params.h>
|
||
|
|
/*
|
||
|
|
/* char *var_myhostname;
|
||
|
|
/* char *var_mydomain;
|
||
|
|
/* char *var_myorigin;
|
||
|
|
/* char *var_mydest;
|
||
|
|
/* char *var_relayhost;
|
||
|
|
/* char *var_transit_origin;
|
||
|
|
/* char *var_transit_dest;
|
||
|
|
/* char *var_mail_name;
|
||
|
|
/* char *var_mail_owner;
|
||
|
|
/* uid_t var_owner_uid;
|
||
|
|
/* gid_t var_owner_gid;
|
||
|
|
/* char *var_default_privs;
|
||
|
|
/* uid_t var_default_uid;
|
||
|
|
/* gid_t var_default_gid;
|
||
|
|
/* char *var_config_dir;
|
||
|
|
/* char *var_program_dir;
|
||
|
|
/* char *var_daemon_dir;
|
||
|
|
/* char *var_command_dir;
|
||
|
|
/* char *var_queue_dir;
|
||
|
|
/* int var_use_limit;
|
||
|
|
/* int var_idle_limit;
|
||
|
|
/* int var_bundle_rcpt;
|
||
|
|
/* char *var_procname;
|
||
|
|
/* int var_pid;
|
||
|
|
/* int var_ipc_timeout;
|
||
|
|
/* char *var_pid_dir;
|
||
|
|
/* int var_dont_remove;
|
||
|
|
/* char *var_inet_interfaces;
|
||
|
|
/* char *var_mynetworks;
|
||
|
|
/* char *var_double_bounce_sender;
|
||
|
|
/* int var_line_limit;
|
||
|
|
/* char *var_alias_db_map;
|
||
|
|
/* int var_message_limit;
|
||
|
|
/* char *var_mail_version;
|
||
|
|
/* int var_ipc_idle_limit;
|
||
|
|
/* char *var_db_type;
|
||
|
|
/* char *var_hash_queue_names;
|
||
|
|
/* int var_hash_queue_depth;
|
||
|
|
/* int var_trigger_timeout;
|
||
|
|
/* char *var_rcpt_delim;
|
||
|
|
/* int var_fork_tries;
|
||
|
|
/* int var_fork_delay;
|
||
|
|
/* int var_flock_tries;
|
||
|
|
/* int var_flock_delay;
|
||
|
|
/* int var_flock_stale;
|
||
|
|
/* int var_mailtool_compat;
|
||
|
|
/* int var_disable_dns;
|
||
|
|
/* int var_soft_bounce;
|
||
|
|
/* time_t var_starttime;
|
||
|
|
/* int var_ownreq_special;
|
||
|
|
/* int var_daemon_timeout;
|
||
|
|
/*
|
||
|
|
/* void mail_params_init()
|
||
|
|
/* DESCRIPTION
|
||
|
|
/* This module (actually the associated include file) define the names
|
||
|
|
/* and defaults of all mail configuration parameters.
|
||
|
|
/*
|
||
|
|
/* mail_params_init() initializes the built-in parameters listed above.
|
||
|
|
/* These parameters are relied upon by library routines, so they are
|
||
|
|
/* initialized globally so as to avoid hard-to-find errors due to
|
||
|
|
/* missing initialization. This routine must be called early, at
|
||
|
|
/* least before entering a chroot jail.
|
||
|
|
/* DIAGNOSTICS
|
||
|
|
/* Fatal errors: out of memory; null system or domain name.
|
||
|
|
/* LICENSE
|
||
|
|
/* .ad
|
||
|
|
/* .fi
|
||
|
|
/* The Secure Mailer license must be distributed with this software.
|
||
|
|
/* AUTHOR(S)
|
||
|
|
/* Wietse Venema
|
||
|
|
/* IBM T.J. Watson Research
|
||
|
|
/* P.O. Box 704
|
||
|
|
/* Yorktown Heights, NY 10598, USA
|
||
|
|
/*--*/
|
||
|
|
|
||
|
|
/* System library. */
|
||
|
|
|
||
|
|
#include <sys_defs.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <pwd.h>
|
||
|
|
#include <time.h>
|
||
|
|
|
||
|
|
#ifdef STRCASECMP_IN_STRINGS_H
|
||
|
|
#include <strings.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Utility library. */
|
||
|
|
|
||
|
|
#include <msg.h>
|
||
|
|
#include <get_hostname.h>
|
||
|
|
#include <valid_hostname.h>
|
||
|
|
#include <stringops.h>
|
||
|
|
|
||
|
|
/* Global library. */
|
||
|
|
|
||
|
|
#include "mynetworks.h"
|
||
|
|
#include "mail_conf.h"
|
||
|
|
#include "mail_version.h"
|
||
|
|
#include "mail_params.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Special configuration variables.
|
||
|
|
*/
|
||
|
|
char *var_myhostname;
|
||
|
|
char *var_mydomain;
|
||
|
|
char *var_myorigin;
|
||
|
|
char *var_mydest;
|
||
|
|
char *var_relayhost;
|
||
|
|
char *var_transit_origin;
|
||
|
|
char *var_transit_dest;
|
||
|
|
char *var_mail_name;
|
||
|
|
char *var_mail_owner;
|
||
|
|
uid_t var_owner_uid;
|
||
|
|
gid_t var_owner_gid;
|
||
|
|
char *var_default_privs;
|
||
|
|
uid_t var_default_uid;
|
||
|
|
gid_t var_default_gid;
|
||
|
|
char *var_config_dir;
|
||
|
|
char *var_program_dir;
|
||
|
|
char *var_daemon_dir;
|
||
|
|
char *var_command_dir;
|
||
|
|
char *var_queue_dir;
|
||
|
|
int var_use_limit;
|
||
|
|
int var_idle_limit;
|
||
|
|
int var_bundle_rcpt;
|
||
|
|
char *var_procname;
|
||
|
|
int var_pid;
|
||
|
|
int var_ipc_timeout;
|
||
|
|
char *var_pid_dir;
|
||
|
|
int var_dont_remove;
|
||
|
|
char *var_inet_interfaces;
|
||
|
|
char *var_mynetworks;
|
||
|
|
char *var_double_bounce_sender;
|
||
|
|
int var_line_limit;
|
||
|
|
char *var_alias_db_map;
|
||
|
|
int var_message_limit;
|
||
|
|
char *var_mail_version;
|
||
|
|
int var_ipc_idle_limit;
|
||
|
|
char *var_db_type;
|
||
|
|
char *var_hash_queue_names;
|
||
|
|
int var_hash_queue_depth;
|
||
|
|
int var_trigger_timeout;
|
||
|
|
char *var_rcpt_delim;
|
||
|
|
int var_fork_tries;
|
||
|
|
int var_fork_delay;
|
||
|
|
int var_flock_tries;
|
||
|
|
int var_flock_delay;
|
||
|
|
int var_flock_stale;
|
||
|
|
int var_mailtool_compat;
|
||
|
|
int var_disable_dns;
|
||
|
|
int var_soft_bounce;
|
||
|
|
time_t var_starttime;
|
||
|
|
int var_ownreq_special;
|
||
|
|
int var_daemon_timeout;
|
||
|
|
|
||
|
|
/* check_myhostname - lookup hostname and validate */
|
||
|
|
|
||
|
|
static const char *check_myhostname(void)
|
||
|
|
{
|
||
|
|
static const char *name;
|
||
|
|
const char *dot;
|
||
|
|
const char *domain;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Use cached result.
|
||
|
|
*/
|
||
|
|
if (name)
|
||
|
|
return (name);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If the local machine name is not in FQDN form, try to append the
|
||
|
|
* contents of $mydomain.
|
||
|
|
*/
|
||
|
|
name = get_hostname();
|
||
|
|
if ((dot = strchr(name, '.')) == 0) {
|
||
|
|
if ((domain = mail_conf_lookup_eval(VAR_MYDOMAIN)) == 0)
|
||
|
|
msg_fatal("My hostname %s is not a fully qualified name - set %s or %s in %s/main.cf",
|
||
|
|
name, VAR_MYHOSTNAME, VAR_MYDOMAIN, var_config_dir);
|
||
|
|
name = concatenate(name, ".", domain, (char *) 0);
|
||
|
|
}
|
||
|
|
return (name);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* check_mydomainname - lookup domain name and validate */
|
||
|
|
|
||
|
|
static const char *check_mydomainname(void)
|
||
|
|
{
|
||
|
|
char *dot;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Use the hostname when it is not a FQDN ("foo"), or when the hostname
|
||
|
|
* actually is a domain name ("foo.com").
|
||
|
|
*/
|
||
|
|
if ((dot = strchr(var_myhostname, '.')) == 0 || strchr(dot + 1, '.') == 0)
|
||
|
|
return (var_myhostname);
|
||
|
|
return (dot + 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* check_default_privs - lookup default user attributes and validate */
|
||
|
|
|
||
|
|
static void check_default_privs(void)
|
||
|
|
{
|
||
|
|
struct passwd *pwd;
|
||
|
|
|
||
|
|
if ((pwd = getpwnam(var_default_privs)) == 0)
|
||
|
|
msg_fatal("unknown %s configuration parameter value: %s",
|
||
|
|
VAR_DEFAULT_PRIVS, var_default_privs);
|
||
|
|
if ((var_default_uid = pwd->pw_uid) == 0)
|
||
|
|
msg_fatal("%s: %s: privileged user is not allowed",
|
||
|
|
VAR_DEFAULT_PRIVS, var_default_privs);
|
||
|
|
if ((var_default_gid = pwd->pw_gid) == 0)
|
||
|
|
msg_fatal("%s: %s: privileged group is not allowed",
|
||
|
|
VAR_DEFAULT_PRIVS, var_default_privs);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* check_mail_owner - lookup owner user attributes and validate */
|
||
|
|
|
||
|
|
static void check_mail_owner(void)
|
||
|
|
{
|
||
|
|
struct passwd *pwd;
|
||
|
|
|
||
|
|
if ((pwd = getpwnam(var_mail_owner)) == 0)
|
||
|
|
msg_fatal("unknown %s configuration parameter value: %s",
|
||
|
|
VAR_MAIL_OWNER, var_mail_owner);
|
||
|
|
if ((var_owner_uid = pwd->pw_uid) == 0)
|
||
|
|
msg_fatal("%s: %s: privileged user is not allowed",
|
||
|
|
VAR_MAIL_OWNER, var_mail_owner);
|
||
|
|
if ((var_owner_gid = pwd->pw_gid) == 0)
|
||
|
|
msg_fatal("%s: %s: privileged group is not allowed",
|
||
|
|
VAR_DEFAULT_PRIVS, var_mail_owner);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* mail_params_init - configure built-in parameters */
|
||
|
|
|
||
|
|
void mail_params_init()
|
||
|
|
{
|
||
|
|
static CONFIG_STR_FN_TABLE function_str_defaults[] = {
|
||
|
|
VAR_MYHOSTNAME, check_myhostname, &var_myhostname, 1, 0,
|
||
|
|
VAR_MYDOMAIN, check_mydomainname, &var_mydomain, 1, 0,
|
||
|
|
0,
|
||
|
|
};
|
||
|
|
static CONFIG_STR_TABLE other_str_defaults[] = {
|
||
|
|
VAR_MAIL_NAME, DEF_MAIL_NAME, &var_mail_name, 1, 0,
|
||
|
|
VAR_MAIL_OWNER, DEF_MAIL_OWNER, &var_mail_owner, 1, 0,
|
||
|
|
VAR_MYDEST, DEF_MYDEST, &var_mydest, 0, 0,
|
||
|
|
VAR_MYORIGIN, DEF_MYORIGIN, &var_myorigin, 1, 0,
|
||
|
|
VAR_RELAYHOST, DEF_RELAYHOST, &var_relayhost, 0, 0,
|
||
|
|
VAR_PROGRAM_DIR, DEF_PROGRAM_DIR, &var_program_dir, 1, 0,
|
||
|
|
VAR_DAEMON_DIR, DEF_DAEMON_DIR, &var_daemon_dir, 1, 0,
|
||
|
|
VAR_COMMAND_DIR, DEF_COMMAND_DIR, &var_command_dir, 1, 0,
|
||
|
|
VAR_QUEUE_DIR, DEF_QUEUE_DIR, &var_queue_dir, 1, 0,
|
||
|
|
VAR_PID_DIR, DEF_PID_DIR, &var_pid_dir, 1, 0,
|
||
|
|
VAR_INET_INTERFACES, DEF_INET_INTERFACES, &var_inet_interfaces, 1, 0,
|
||
|
|
VAR_DOUBLE_BOUNCE, DEF_DOUBLE_BOUNCE, &var_double_bounce_sender, 1, 0,
|
||
|
|
VAR_DEFAULT_PRIVS, DEF_DEFAULT_PRIVS, &var_default_privs, 1, 0,
|
||
|
|
VAR_ALIAS_DB_MAP, DEF_ALIAS_DB_MAP, &var_alias_db_map, 1, 0,
|
||
|
|
VAR_MAIL_VERSION, DEF_MAIL_VERSION, &var_mail_version, 1, 0,
|
||
|
|
VAR_DB_TYPE, DEF_DB_TYPE, &var_db_type, 1, 0,
|
||
|
|
VAR_HASH_QUEUE_NAMES, DEF_HASH_QUEUE_NAMES, &var_hash_queue_names, 1, 0,
|
||
|
|
VAR_RCPT_DELIM, DEF_RCPT_DELIM, &var_rcpt_delim, 0, 1,
|
||
|
|
0,
|
||
|
|
};
|
||
|
|
static CONFIG_STR_FN_TABLE function_str_defaults_2[] = {
|
||
|
|
VAR_MYNETWORKS, mynetworks, &var_mynetworks, 1, 0,
|
||
|
|
0,
|
||
|
|
};
|
||
|
|
static CONFIG_INT_TABLE other_int_defaults[] = {
|
||
|
|
VAR_MAX_USE, DEF_MAX_USE, &var_use_limit, 1, 0,
|
||
|
|
VAR_MAX_IDLE, DEF_MAX_IDLE, &var_idle_limit, 1, 0,
|
||
|
|
VAR_IPC_TIMEOUT, DEF_IPC_TIMEOUT, &var_ipc_timeout, 1, 0,
|
||
|
|
VAR_DONT_REMOVE, DEF_DONT_REMOVE, &var_dont_remove, 0, 0,
|
||
|
|
VAR_LINE_LIMIT, DEF_LINE_LIMIT, &var_line_limit, 512, 0,
|
||
|
|
VAR_MESSAGE_LIMIT, DEF_MESSAGE_LIMIT, &var_message_limit, 0, 0,
|
||
|
|
VAR_IPC_IDLE, DEF_IPC_IDLE, &var_ipc_idle_limit, 1, 0,
|
||
|
|
VAR_HASH_QUEUE_DEPTH, DEF_HASH_QUEUE_DEPTH, &var_hash_queue_depth, 1, 0,
|
||
|
|
VAR_TRIGGER_TIMEOUT, DEF_TRIGGER_TIMEOUT, &var_trigger_timeout, 1, 0,
|
||
|
|
VAR_FORK_TRIES, DEF_FORK_TRIES, &var_fork_tries, 1, 0,
|
||
|
|
VAR_FORK_DELAY, DEF_FORK_DELAY, &var_fork_delay, 1, 0,
|
||
|
|
VAR_FLOCK_TRIES, DEF_FLOCK_TRIES, &var_flock_tries, 1, 0,
|
||
|
|
VAR_FLOCK_DELAY, DEF_FLOCK_DELAY, &var_flock_delay, 1, 0,
|
||
|
|
VAR_FLOCK_STALE, DEF_FLOCK_STALE, &var_flock_stale, 1, 0,
|
||
|
|
VAR_DAEMON_TIMEOUT, DEF_DAEMON_TIMEOUT, &var_daemon_timeout, 1, 0,
|
||
|
|
0,
|
||
|
|
};
|
||
|
|
static CONFIG_BOOL_TABLE bool_defaults[] = {
|
||
|
|
VAR_DISABLE_DNS, DEF_DISABLE_DNS, &var_disable_dns,
|
||
|
|
VAR_SOFT_BOUNCE, DEF_SOFT_BOUNCE, &var_soft_bounce,
|
||
|
|
VAR_OWNREQ_SPECIAL, DEF_OWNREQ_SPECIAL, &var_ownreq_special,
|
||
|
|
VAR_MAILTOOL_COMPAT, DEF_MAILTOOL_COMPAT, &var_mailtool_compat,
|
||
|
|
0,
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Variables whose defaults are determined at runtime. Some sites use
|
||
|
|
* short hostnames in the host table; some sites name their system after
|
||
|
|
* the domain.
|
||
|
|
*/
|
||
|
|
get_mail_conf_str_fn_table(function_str_defaults);
|
||
|
|
if (!valid_hostname(var_myhostname) || !valid_hostname(var_mydomain))
|
||
|
|
msg_fatal("host or domain name configuration error");
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Variables that are needed by almost every program.
|
||
|
|
*/
|
||
|
|
get_mail_conf_str_table(other_str_defaults);
|
||
|
|
get_mail_conf_int_table(other_int_defaults);
|
||
|
|
get_mail_conf_bool_table(bool_defaults);
|
||
|
|
check_default_privs();
|
||
|
|
check_mail_owner();
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Variables whose defaults are determined at runtime, after other
|
||
|
|
* variables have been set. This dependency is admittedly a bit tricky.
|
||
|
|
* XXX Perhaps we should just register variables, and let the evaluator
|
||
|
|
* figure out in what order to evaluate things.
|
||
|
|
*/
|
||
|
|
get_mail_conf_str_fn_table(function_str_defaults_2);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The PID variable cannot be set from the configuration file!!
|
||
|
|
*/
|
||
|
|
set_mail_conf_int(VAR_PID, var_pid = getpid());
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Neither can the start time variable. It isn't even visible.
|
||
|
|
*/
|
||
|
|
time(&var_starttime);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* I have seen this happen just too often.
|
||
|
|
*/
|
||
|
|
if (strcasecmp(var_myhostname, var_relayhost) == 0)
|
||
|
|
msg_fatal("myhostname == relayhost");
|
||
|
|
}
|