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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 00:47:26 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 00:47:26 +0000 |
| commit | 96b619cc129afed52411b9fad3407037a1cb7207 (patch) | |
| tree | e453a74cc9ae39fbfcb3ac55a347e880413e4a06 /src/readconf.c | |
| parent | Initial commit. (diff) | |
| download | exim4-96b619cc129afed52411b9fad3407037a1cb7207.tar.xz exim4-96b619cc129afed52411b9fad3407037a1cb7207.zip | |
Adding upstream version 4.92.upstream/4.92upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
| -rw-r--r-- | src/readconf.c | 4548 |
1 files changed, 4548 insertions, 0 deletions
diff --git a/src/readconf.c b/src/readconf.c new file mode 100644 index 0000000..5742d10 --- /dev/null +++ b/src/readconf.c @@ -0,0 +1,4548 @@ +/************************************************* +* Exim - an Internet mail transport agent * +*************************************************/ + +/* Copyright (c) University of Cambridge 1995 - 2018 */ +/* See the file NOTICE for conditions of use and distribution. */ + +/* Functions for reading the configuration file, and for displaying +overall configuration values. Thanks to Brian Candler for the original +implementation of the conditional .ifdef etc. */ + +#include "exim.h" + +#ifdef MACRO_PREDEF +# include "macro_predef.h" +#endif + +#define READCONF_DEBUG if (FALSE) /* Change to TRUE to enable */ + + +static uschar * syslog_facility_str; +static void fn_smtp_receive_timeout(const uschar *, const uschar *); + +/************************************************* +* Main configuration options * +*************************************************/ + +/* The list of options that can be set in the main configuration file. This +must be in alphabetic order because it is searched by binary chop. */ + +static optionlist optionlist_config[] = { + { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set }, + { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set }, + { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set }, + { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set }, + { "accept_8bitmime", opt_bool, &accept_8bitmime }, + { "acl_not_smtp", opt_stringptr, &acl_not_smtp }, +#ifdef WITH_CONTENT_SCAN + { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime }, +#endif + { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start }, + { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth }, + { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect }, + { "acl_smtp_data", opt_stringptr, &acl_smtp_data }, +#ifndef DISABLE_PRDR + { "acl_smtp_data_prdr", opt_stringptr, &acl_smtp_data_prdr }, +#endif +#ifndef DISABLE_DKIM + { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim }, +#endif + { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn }, + { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn }, + { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo }, + { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail }, + { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth }, +#ifdef WITH_CONTENT_SCAN + { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime }, +#endif + { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit }, + { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata }, + { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit }, + { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt }, +#ifdef SUPPORT_TLS + { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls }, +#endif + { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy }, + { "add_environment", opt_stringptr, &add_environment }, + { "admin_groups", opt_gidlist, &admin_groups }, + { "allow_domain_literals", opt_bool, &allow_domain_literals }, + { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip }, + { "allow_utf8_domains", opt_bool, &allow_utf8_domains }, + { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts }, + { "auto_thaw", opt_time, &auto_thaw }, +#ifdef WITH_CONTENT_SCAN + { "av_scanner", opt_stringptr, &av_scanner }, +#endif + { "bi_command", opt_stringptr, &bi_command }, +#ifdef EXPERIMENTAL_BRIGHTMAIL + { "bmi_config_file", opt_stringptr, &bmi_config_file }, +#endif + { "bounce_message_file", opt_stringptr, &bounce_message_file }, + { "bounce_message_text", opt_stringptr, &bounce_message_text }, + { "bounce_return_body", opt_bool, &bounce_return_body }, + { "bounce_return_linesize_limit", opt_mkint, &bounce_return_linesize_limit }, + { "bounce_return_message", opt_bool, &bounce_return_message }, + { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit }, + { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication }, + { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire }, + { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire }, + { "callout_negative_expire", opt_time, &callout_cache_negative_expire }, + { "callout_positive_expire", opt_time, &callout_cache_positive_expire }, + { "callout_random_local_part",opt_stringptr, &callout_random_local_part }, + { "check_log_inodes", opt_int, &check_log_inodes }, + { "check_log_space", opt_Kint, &check_log_space }, + { "check_rfc2047_length", opt_bool, &check_rfc2047_length }, + { "check_spool_inodes", opt_int, &check_spool_inodes }, + { "check_spool_space", opt_Kint, &check_spool_space }, + { "chunking_advertise_hosts", opt_stringptr, &chunking_advertise_hosts }, + { "commandline_checks_require_admin", opt_bool,&commandline_checks_require_admin }, + { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port }, + { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port }, + { "daemon_startup_retries", opt_int, &daemon_startup_retries }, + { "daemon_startup_sleep", opt_time, &daemon_startup_sleep }, +#ifdef EXPERIMENTAL_DCC + { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header }, + { "dccifd_address", opt_stringptr, &dccifd_address }, + { "dccifd_options", opt_stringptr, &dccifd_options }, +#endif + { "debug_store", opt_bool, &debug_store }, + { "delay_warning", opt_timelist, &delay_warning }, + { "delay_warning_condition", opt_stringptr, &delay_warning_condition }, + { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege }, + { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max }, + { "delivery_date_remove", opt_bool, &delivery_date_remove }, +#ifdef ENABLE_DISABLE_FSYNC + { "disable_fsync", opt_bool, &disable_fsync }, +#endif + { "disable_ipv6", opt_bool, &disable_ipv6 }, +#ifndef DISABLE_DKIM + { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers }, +#endif +#ifdef EXPERIMENTAL_DMARC + { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender }, + { "dmarc_history_file", opt_stringptr, &dmarc_history_file }, + { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file }, +#endif + { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist }, + { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern }, + { "dns_cname_loops", opt_int, &dns_cname_loops }, + { "dns_csa_search_limit", opt_int, &dns_csa_search_limit }, + { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse }, + { "dns_dnssec_ok", opt_int, &dns_dnssec_ok }, + { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup }, + { "dns_retrans", opt_time, &dns_retrans }, + { "dns_retry", opt_int, &dns_retry }, + { "dns_trust_aa", opt_stringptr, &dns_trust_aa }, + { "dns_use_edns0", opt_int, &dns_use_edns0 }, + /* This option is now a no-op, retained for compatibility */ + { "drop_cr", opt_bool, &drop_cr }, +/*********************************************************/ + { "dsn_advertise_hosts", opt_stringptr, &dsn_advertise_hosts }, + { "dsn_from", opt_stringptr, &dsn_from }, + { "envelope_to_remove", opt_bool, &envelope_to_remove }, + { "errors_copy", opt_stringptr, &errors_copy }, + { "errors_reply_to", opt_stringptr, &errors_reply_to }, +#ifndef DISABLE_EVENT + { "event_action", opt_stringptr, &event_action }, +#endif + { "exim_group", opt_gid, &exim_gid }, + { "exim_path", opt_stringptr, &exim_path }, + { "exim_user", opt_uid, &exim_uid }, + { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces }, + { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments }, + { "finduser_retries", opt_int, &finduser_retries }, + { "freeze_tell", opt_stringptr, &freeze_tell }, + { "gecos_name", opt_stringptr, &gecos_name }, + { "gecos_pattern", opt_stringptr, &gecos_pattern }, +#ifdef SUPPORT_TLS + { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 }, + { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode }, +#endif + { "header_line_maxsize", opt_int, &header_line_maxsize }, + { "header_maxsize", opt_int, &header_maxsize }, + { "headers_charset", opt_stringptr, &headers_charset }, + { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts }, + { "helo_allow_chars", opt_stringptr, &helo_allow_chars }, + { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains }, + { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts }, + { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts }, + { "hold_domains", opt_stringptr, &hold_domains }, + { "host_lookup", opt_stringptr, &host_lookup }, + { "host_lookup_order", opt_stringptr, &host_lookup_order }, + { "host_reject_connection", opt_stringptr, &host_reject_connection }, + { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog }, +#ifdef SUPPORT_PROXY + { "hosts_proxy", opt_stringptr, &hosts_proxy }, +#endif + { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local }, +#ifdef LOOKUP_IBASE + { "ibase_servers", opt_stringptr, &ibase_servers }, +#endif + { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after }, + { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts }, + { "ignore_fromline_local", opt_bool, &ignore_fromline_local }, + { "keep_environment", opt_stringptr, &keep_environment }, + { "keep_malformed", opt_time, &keep_malformed }, +#ifdef LOOKUP_LDAP + { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir }, + { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file }, + { "ldap_cert_file", opt_stringptr, &eldap_cert_file }, + { "ldap_cert_key", opt_stringptr, &eldap_cert_key }, + { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite }, + { "ldap_default_servers", opt_stringptr, &eldap_default_servers }, + { "ldap_require_cert", opt_stringptr, &eldap_require_cert }, + { "ldap_start_tls", opt_bool, &eldap_start_tls }, + { "ldap_version", opt_int, &eldap_version }, +#endif + { "local_from_check", opt_bool, &local_from_check }, + { "local_from_prefix", opt_stringptr, &local_from_prefix }, + { "local_from_suffix", opt_stringptr, &local_from_suffix }, + { "local_interfaces", opt_stringptr, &local_interfaces }, +#ifdef HAVE_LOCAL_SCAN + { "local_scan_timeout", opt_time, &local_scan_timeout }, +#endif + { "local_sender_retain", opt_bool, &local_sender_retain }, + { "localhost_number", opt_stringptr, &host_number_string }, + { "log_file_path", opt_stringptr, &log_file_path }, + { "log_selector", opt_stringptr, &log_selector_string }, + { "log_timezone", opt_bool, &log_timezone }, + { "lookup_open_max", opt_int, &lookup_open_max }, + { "max_username_length", opt_int, &max_username_length }, + { "message_body_newlines", opt_bool, &message_body_newlines }, + { "message_body_visible", opt_mkint, &message_body_visible }, + { "message_id_header_domain", opt_stringptr, &message_id_domain }, + { "message_id_header_text", opt_stringptr, &message_id_text }, + { "message_logs", opt_bool, &message_logs }, + { "message_size_limit", opt_stringptr, &message_size_limit }, +#ifdef SUPPORT_MOVE_FROZEN_MESSAGES + { "move_frozen_messages", opt_bool, &move_frozen_messages }, +#endif + { "mua_wrapper", opt_bool, &mua_wrapper }, +#ifdef LOOKUP_MYSQL + { "mysql_servers", opt_stringptr, &mysql_servers }, +#endif + { "never_users", opt_uidlist, &never_users }, +#ifdef SUPPORT_TLS + { "openssl_options", opt_stringptr, &openssl_options }, +#endif +#ifdef LOOKUP_ORACLE + { "oracle_servers", opt_stringptr, &oracle_servers }, +#endif + { "percent_hack_domains", opt_stringptr, &percent_hack_domains }, +#ifdef EXIM_PERL + { "perl_at_start", opt_bool, &opt_perl_at_start }, + { "perl_startup", opt_stringptr, &opt_perl_startup }, + { "perl_taintmode", opt_bool, &opt_perl_taintmode }, +#endif +#ifdef LOOKUP_PGSQL + { "pgsql_servers", opt_stringptr, &pgsql_servers }, +#endif + { "pid_file_path", opt_stringptr, &pid_file_path }, + { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts }, +#ifdef EXPERIMENTAL_PIPE_CONNECT + { "pipelining_connect_advertise_hosts", opt_stringptr, + &pipe_connect_advertise_hosts }, +#endif +#ifndef DISABLE_PRDR + { "prdr_enable", opt_bool, &prdr_enable }, +#endif + { "preserve_message_logs", opt_bool, &preserve_message_logs }, + { "primary_hostname", opt_stringptr, &primary_hostname }, + { "print_topbitchars", opt_bool, &print_topbitchars }, + { "process_log_path", opt_stringptr, &process_log_path }, + { "prod_requires_admin", opt_bool, &prod_requires_admin }, + { "qualify_domain", opt_stringptr, &qualify_domain_sender }, + { "qualify_recipient", opt_stringptr, &qualify_domain_recipient }, + { "queue_domains", opt_stringptr, &queue_domains }, + { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin }, + { "queue_only", opt_bool, &queue_only }, + { "queue_only_file", opt_stringptr, &queue_only_file }, + { "queue_only_load", opt_fixed, &queue_only_load }, + { "queue_only_load_latch", opt_bool, &queue_only_load_latch }, + { "queue_only_override", opt_bool, &queue_only_override }, + { "queue_run_in_order", opt_bool, &queue_run_in_order }, + { "queue_run_max", opt_stringptr, &queue_run_max }, + { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains }, + { "receive_timeout", opt_time, &receive_timeout }, + { "received_header_text", opt_stringptr, &received_header_text }, + { "received_headers_max", opt_int, &received_headers_max }, + { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts }, + { "recipients_max", opt_int, &recipients_max }, + { "recipients_max_reject", opt_bool, &recipients_max_reject }, +#ifdef LOOKUP_REDIS + { "redis_servers", opt_stringptr, &redis_servers }, +#endif + { "remote_max_parallel", opt_int, &remote_max_parallel }, + { "remote_sort_domains", opt_stringptr, &remote_sort_domains }, + { "retry_data_expire", opt_time, &retry_data_expire }, + { "retry_interval_max", opt_time, &retry_interval_max }, + { "return_path_remove", opt_bool, &return_path_remove }, + { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit }, + { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts }, + { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout }, + { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts }, + { "slow_lookup_log", opt_int, &slow_lookup_log }, + { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive }, + { "smtp_accept_max", opt_int, &smtp_accept_max }, + { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail }, + { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts }, + { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection }, + { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host }, + { "smtp_accept_queue", opt_int, &smtp_accept_queue }, + { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection }, + { "smtp_accept_reserve", opt_int, &smtp_accept_reserve }, + { "smtp_active_hostname", opt_stringptr, &raw_active_hostname }, + { "smtp_banner", opt_stringptr, &smtp_banner }, + { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space }, + { "smtp_connect_backlog", opt_int, &smtp_connect_backlog }, + { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync }, + { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command }, + { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize }, + { "smtp_load_reserve", opt_fixed, &smtp_load_reserve }, + { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors }, + { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands }, + { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts }, + { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail }, + { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt }, + { "smtp_receive_timeout", opt_func, &fn_smtp_receive_timeout }, + { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts }, + { "smtp_return_error_details",opt_bool, &smtp_return_error_details }, +#ifdef SUPPORT_I18N + { "smtputf8_advertise_hosts", opt_stringptr, &smtputf8_advertise_hosts }, +#endif +#ifdef WITH_CONTENT_SCAN + { "spamd_address", opt_stringptr, &spamd_address }, +#endif +#ifdef SUPPORT_SPF + { "spf_guess", opt_stringptr, &spf_guess }, +#endif + { "split_spool_directory", opt_bool, &split_spool_directory }, + { "spool_directory", opt_stringptr, &spool_directory }, + { "spool_wireformat", opt_bool, &spool_wireformat }, +#ifdef LOOKUP_SQLITE + { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout }, +#endif +#ifdef EXPERIMENTAL_SRS + { "srs_config", opt_stringptr, &srs_config }, + { "srs_hashlength", opt_int, &srs_hashlength }, + { "srs_hashmin", opt_int, &srs_hashmin }, + { "srs_maxage", opt_int, &srs_maxage }, + { "srs_secrets", opt_stringptr, &srs_secrets }, + { "srs_usehash", opt_bool, &srs_usehash }, + { "srs_usetimestamp", opt_bool, &srs_usetimestamp }, +#endif + { "strict_acl_vars", opt_bool, &strict_acl_vars }, + { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets }, + { "strip_trailing_dot", opt_bool, &strip_trailing_dot }, + { "syslog_duplication", opt_bool, &syslog_duplication }, + { "syslog_facility", opt_stringptr, &syslog_facility_str }, + { "syslog_pid", opt_bool, &syslog_pid }, + { "syslog_processname", opt_stringptr, &syslog_processname }, + { "syslog_timestamp", opt_bool, &syslog_timestamp }, + { "system_filter", opt_stringptr, &system_filter }, + { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport }, + { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport }, + { "system_filter_group", opt_gid, &system_filter_gid }, + { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport }, + { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport }, + { "system_filter_user", opt_uid, &system_filter_uid }, + { "tcp_nodelay", opt_bool, &tcp_nodelay }, +#ifdef USE_TCP_WRAPPERS + { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name }, +#endif + { "timeout_frozen_after", opt_time, &timeout_frozen_after }, + { "timezone", opt_stringptr, &timezone_string }, + { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts }, +#ifdef SUPPORT_TLS +# ifdef EXPERIMENTAL_REQUIRETLS + { "tls_advertise_requiretls", opt_stringptr, &tls_advertise_requiretls }, +# endif + { "tls_certificate", opt_stringptr, &tls_certificate }, + { "tls_crl", opt_stringptr, &tls_crl }, + { "tls_dh_max_bits", opt_int, &tls_dh_max_bits }, + { "tls_dhparam", opt_stringptr, &tls_dhparam }, + { "tls_eccurve", opt_stringptr, &tls_eccurve }, +# ifndef DISABLE_OCSP + { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file }, +# endif + { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports }, + { "tls_privatekey", opt_stringptr, &tls_privatekey }, + { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp }, + { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers }, + { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts }, + { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates }, + { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts }, +#endif + { "trusted_groups", opt_gidlist, &trusted_groups }, + { "trusted_users", opt_uidlist, &trusted_users }, + { "unknown_login", opt_stringptr, &unknown_login }, + { "unknown_username", opt_stringptr, &unknown_username }, + { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender }, + { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern }, + { "uucp_from_sender", opt_stringptr, &uucp_from_sender }, + { "warn_message_file", opt_stringptr, &warn_message_file }, + { "write_rejectlog", opt_bool, &write_rejectlog } +}; + +#ifndef MACRO_PREDEF +static int optionlist_config_size = nelem(optionlist_config); +#endif + + +#ifdef MACRO_PREDEF + +static void fn_smtp_receive_timeout(const uschar * name, const uschar * str) {/*Dummy*/} + +void +options_main(void) +{ +options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN", NULL); +} + +void +options_auths(void) +{ +struct auth_info * ai; +uschar buf[64]; + +options_from_list(optionlist_auths, optionlist_auths_size, US"AUTHENTICATORS", NULL); + +for (ai = auths_available; ai->driver_name[0]; ai++) + { + spf(buf, sizeof(buf), US"_DRIVER_AUTHENTICATOR_%T", ai->driver_name); + builtin_macro_create(buf); + options_from_list(ai->options, (unsigned)*ai->options_count, US"AUTHENTICATOR", ai->driver_name); + } +} + +void +options_logging(void) +{ +bit_table * bp; +uschar buf[64]; + +for (bp = log_options; bp < log_options + log_options_count; bp++) + { + spf(buf, sizeof(buf), US"_LOG_%T", bp->name); + builtin_macro_create(buf); + } +} + + +#else /*!MACRO_PREDEF*/ + +extern char **environ; + +static void save_config_line(const uschar* line); +static void save_config_position(const uschar *file, int line); +static void print_config(BOOL admin, BOOL terse); + + +#define CSTATE_STACK_SIZE 10 + +const uschar *config_directory = NULL; + + +/* Structure for chain (stack) of .included files */ + +typedef struct config_file_item { + struct config_file_item *next; + const uschar *filename; + const uschar *directory; + FILE *file; + int lineno; +} config_file_item; + +/* Structure for chain of configuration lines (-bP config) */ + +typedef struct config_line_item { + struct config_line_item *next; + uschar *line; +} config_line_item; + +static config_line_item* config_lines; + +/* Structure of table of conditional words and their state transitions */ + +typedef struct cond_item { + uschar *name; + int namelen; + int action1; + int action2; + int pushpop; +} cond_item; + +/* Structure of table of syslog facility names and values */ + +typedef struct syslog_fac_item { + uschar *name; + int value; +} syslog_fac_item; + +/* constants */ +static const char * const hidden = "<value not displayable>"; + +/* Static variables */ + +static config_file_item *config_file_stack = NULL; /* For includes */ + +static uschar *syslog_facility_str = NULL; +static uschar next_section[24]; +static uschar time_buffer[24]; + +/* State variables for conditional loading (.ifdef / .else / .endif) */ + +static int cstate = 0; +static int cstate_stack_ptr = -1; +static int cstate_stack[CSTATE_STACK_SIZE]; + +/* Table of state transitions for handling conditional inclusions. There are +four possible state transitions: + + .ifdef true + .ifdef false + .elifdef true (or .else) + .elifdef false + +.endif just causes the previous cstate to be popped off the stack */ + +static int next_cstate[3][4] = + { + /* State 0: reading from file, or reading until next .else or .endif */ + { 0, 1, 2, 2 }, + /* State 1: condition failed, skipping until next .else or .endif */ + { 2, 2, 0, 1 }, + /* State 2: skipping until .endif */ + { 2, 2, 2, 2 }, + }; + +/* Table of conditionals and the states to set. For each name, there are four +values: the length of the name (to save computing it each time), the state to +set if a macro was found in the line, the state to set if a macro was not found +in the line, and a stack manipulation setting which is: + + -1 pull state value off the stack + 0 don't alter the stack + +1 push value onto stack, before setting new state +*/ + +static cond_item cond_list[] = { + { US"ifdef", 5, 0, 1, 1 }, + { US"ifndef", 6, 1, 0, 1 }, + { US"elifdef", 7, 2, 3, 0 }, + { US"elifndef", 8, 3, 2, 0 }, + { US"else", 4, 2, 2, 0 }, + { US"endif", 5, 0, 0, -1 } +}; + +static int cond_list_size = sizeof(cond_list)/sizeof(cond_item); + +/* Table of syslog facility names and their values */ + +static syslog_fac_item syslog_list[] = { + { US"mail", LOG_MAIL }, + { US"user", LOG_USER }, + { US"news", LOG_NEWS }, + { US"uucp", LOG_UUCP }, + { US"local0", LOG_LOCAL0 }, + { US"local1", LOG_LOCAL1 }, + { US"local2", LOG_LOCAL2 }, + { US"local3", LOG_LOCAL3 }, + { US"local4", LOG_LOCAL4 }, + { US"local5", LOG_LOCAL5 }, + { US"local6", LOG_LOCAL6 }, + { US"local7", LOG_LOCAL7 }, + { US"daemon", LOG_DAEMON } +}; + +static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item); + + + + +/************************************************* +* Find the name of an option * +*************************************************/ + +/* This function is to aid debugging. Various functions take arguments that are +pointer variables in the options table or in option tables for various drivers. +For debugging output, it is useful to be able to find the name of the option +which is currently being processed. This function finds it, if it exists, by +searching the table(s). + +Arguments: a value that is presumed to be in the table above +Returns: the option name, or an empty string +*/ + +uschar * +readconf_find_option(void *p) +{ +int i; +router_instance *r; +transport_instance *t; + +for (i = 0; i < nelem(optionlist_config); i++) + if (p == optionlist_config[i].value) return US optionlist_config[i].name; + +for (r = routers; r; r = r->next) + { + router_info *ri = r->info; + for (i = 0; i < *ri->options_count; i++) + { + if ((ri->options[i].type & opt_mask) != opt_stringptr) continue; + if (p == CS (r->options_block) + (long int)(ri->options[i].value)) + return US ri->options[i].name; + } + } + +for (t = transports; t; t = t->next) + { + transport_info *ti = t->info; + for (i = 0; i < *ti->options_count; i++) + { + optionlist * op = &ti->options[i]; + if ((op->type & opt_mask) != opt_stringptr) continue; + if (p == ( op->type & opt_public + ? CS t + : CS t->options_block + ) + + (long int)op->value) + return US op->name; + } + } + +return US""; +} + + + + +/************************************************* +* Deal with an assignment to a macro * +*************************************************/ + +/* We have a new definition; append to the list. + +Args: + name Name of the macro; will be copied + val Expansion result for the macro; will be copied +*/ + +macro_item * +macro_create(const uschar * name, const uschar * val, BOOL command_line) +{ +macro_item * m = store_get(sizeof(macro_item)); + +READCONF_DEBUG fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val); +m->next = NULL; +m->command_line = command_line; +m->namelen = Ustrlen(name); +m->replen = Ustrlen(val); +m->name = string_copy(name); +m->replacement = string_copy(val); +if (mlast) + mlast->next = m; +else + macros = m; +mlast = m; +if (!macros_user) + macros_user = m; +return m; +} + + +/* This function is called when a line that starts with an upper case letter is +encountered. The argument "line" should contain a complete logical line, and +start with the first letter of the macro name. The macro name and the +replacement text are extracted and stored. Redefinition of existing, +non-command line, macros is permitted using '==' instead of '='. + +Arguments: + s points to the start of the logical line + +Returns: FALSE iff fatal error +*/ + +BOOL +macro_read_assignment(uschar *s) +{ +uschar name[64]; +int namelen = 0; +BOOL redef = FALSE; +macro_item *m; + +while (isalnum(*s) || *s == '_') + { + if (namelen >= sizeof(name) - 1) + { + log_write(0, LOG_PANIC|LOG_CONFIG_IN, + "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1); + return FALSE; + } + name[namelen++] = *s++; + } +name[namelen] = 0; + +while (isspace(*s)) s++; +if (*s++ != '=') + { + log_write(0, LOG_PANIC|LOG_CONFIG_IN, "malformed macro definition"); + return FALSE; + } + +if (*s == '=') + { + redef = TRUE; + s++; + } +while (isspace(*s)) s++; + +/* If an existing macro of the same name was defined on the command line, we +just skip this definition. It's an error to attempt to redefine a macro without +redef set to TRUE, or to redefine a macro when it hasn't been defined earlier. +It is also an error to define a macro whose name begins with the name of a +previously defined macro. This is the requirement that make using a tree +for macros hard; we must check all macros for the substring. Perhaps a +sorted list, and a bsearch, would work? +Note: it is documented that the other way round works. */ + +for (m = macros; m; m = m->next) + { + if (Ustrcmp(m->name, name) == 0) + { + if (!m->command_line && !redef) + { + log_write(0, LOG_CONFIG|LOG_PANIC, "macro \"%s\" is already " + "defined (use \"==\" if you want to redefine it)", name); + return FALSE; + } + break; + } + + if (m->namelen < namelen && Ustrstr(name, m->name) != NULL) + { + log_write(0, LOG_CONFIG|LOG_PANIC, "\"%s\" cannot be defined as " + "a macro because previously defined macro \"%s\" is a substring", + name, m->name); + return FALSE; + } + + /* We cannot have this test, because it is documented that a substring + macro is permitted (there is even an example). + * + * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL) + * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as " + * "a macro because it is a substring of previously defined macro \"%s\"", + * name, m->name); + */ + } + +/* Check for an overriding command-line definition. */ + +if (m && m->command_line) return TRUE; + +/* Redefinition must refer to an existing macro. */ + +if (redef) + if (m) + { + m->replen = Ustrlen(s); + m->replacement = string_copy(s); + } + else + { + log_write(0, LOG_CONFIG|LOG_PANIC, "can't redefine an undefined macro " + "\"%s\"", name); + return FALSE; + } + +/* We have a new definition. */ +else + (void) macro_create(name, s, FALSE); +return TRUE; +} + + + + + +/* Process line for macros. The line is in big_buffer starting at offset len. +Expand big_buffer if needed. Handle definitions of new macros, and +macro expansions, rewriting the line in the buffer. + +Arguments: + len Offset in buffer of start of line + newlen Pointer to offset of end of line, updated on return + macro_found Pointer to return that a macro was expanded + +Return: pointer to first nonblank char in line +*/ + +uschar * +macros_expand(int len, int * newlen, BOOL * macro_found) +{ +uschar * ss = big_buffer + len; +uschar * s; +macro_item * m; + +/* Find the true start of the physical line - leading spaces are always +ignored. */ + +while (isspace(*ss)) ss++; + +/* Process the physical line for macros. If this is the start of the logical +line, skip over initial text at the start of the line if it starts with an +upper case character followed by a sequence of name characters and an equals +sign, because that is the definition of a new macro, and we don't do +replacement therein. */ + +s = ss; +if (len == 0 && isupper(*s)) + { + while (isalnum(*s) || *s == '_') s++; + while (isspace(*s)) s++; + if (*s != '=') s = ss; /* Not a macro definition */ + } + +/* Skip leading chars which cannot start a macro name, to avoid multiple +pointless rescans in Ustrstr calls. */ + +while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++; + +/* For each defined macro, scan the line (from after XXX= if present), +replacing all occurrences of the macro. */ + +*macro_found = FALSE; +if (*s) for (m = *s == '_' ? macros : macros_user; m; m = m->next) + { + uschar * p, *pp; + uschar * t; + + while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++; + if (!*s) break; + + t = s; + while ((p = Ustrstr(t, m->name)) != NULL) + { + int moveby; + + READCONF_DEBUG fprintf(stderr, "%s: matched '%s' in '%.*s'\n", __FUNCTION__, + m->name, (int) Ustrlen(ss)-1, ss); + /* Expand the buffer if necessary */ + + while (*newlen - m->namelen + m->replen + 1 > big_buffer_size) + { + int newsize = big_buffer_size + BIG_BUFFER_SIZE; + uschar *newbuffer = store_malloc(newsize); + memcpy(newbuffer, big_buffer, *newlen + 1); + p = newbuffer + (p - big_buffer); + s = newbuffer + (s - big_buffer); + ss = newbuffer + (ss - big_buffer); + t = newbuffer + (t - big_buffer); + big_buffer_size = newsize; + store_free(big_buffer); + big_buffer = newbuffer; + } + + /* Shuffle the remaining characters up or down in the buffer before + copying in the replacement text. Don't rescan the replacement for this + same macro. */ + + pp = p + m->namelen; + if ((moveby = m->replen - m->namelen) != 0) + { + memmove(p + m->replen, pp, (big_buffer + *newlen) - pp + 1); + *newlen += moveby; + } + Ustrncpy(p, m->replacement, m->replen); + t = p + m->replen; + while (*t && !isupper(*t) && !(*t == '_' && isupper(t[1]))) t++; + *macro_found = TRUE; + } + } + +/* An empty macro replacement at the start of a line could mean that ss no +longer points to the first non-blank character. */ + +while (isspace(*ss)) ss++; +return ss; +} + +/************************************************* +* Read configuration line * +*************************************************/ + +/* A logical line of text is read from the configuration file into the big +buffer, taking account of macros, .includes, and continuations. The size of +big_buffer is increased if necessary. The count of configuration lines is +maintained. Physical input lines starting with # (ignoring leading white space, +and after macro replacement) and empty logical lines are always ignored. +Leading and trailing spaces are removed. + +If we hit a line of the form "begin xxxx", the xxxx is placed in the +next_section vector, and the function returns NULL, indicating the end of a +configuration section. On end-of-file, NULL is returned with next_section +empty. + +Arguments: none + +Returns: a pointer to the first non-blank in the line, + or NULL if eof or end of section is reached +*/ + +static uschar * +get_config_line(void) +{ +int startoffset = 0; /* To first non-blank char in logical line */ +int len = 0; /* Of logical line so far */ +int newlen; +uschar *s, *ss; +BOOL macro_found; + +/* Loop for handling continuation lines, skipping comments, and dealing with +.include files. */ + +for (;;) + { + if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL) + { + if (config_file_stack != NULL) /* EOF inside .include */ + { + (void)fclose(config_file); + config_file = config_file_stack->file; + config_filename = config_file_stack->filename; + config_directory = config_file_stack->directory; + config_lineno = config_file_stack->lineno; + config_file_stack = config_file_stack->next; + if (config_lines) + save_config_position(config_filename, config_lineno); + continue; + } + + /* EOF at top level */ + + if (cstate_stack_ptr >= 0) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "Unexpected end of configuration file: .endif missing"); + + if (len != 0) break; /* EOF after continuation */ + next_section[0] = 0; /* EOF at start of logical line */ + return NULL; + } + + config_lineno++; + newlen = len + Ustrlen(big_buffer + len); + + if (config_lines && config_lineno == 1) + save_config_position(config_filename, config_lineno); + + /* Handle pathologically long physical lines - yes, it did happen - by + extending big_buffer at this point. The code also copes with very long + logical lines. */ + + while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n') + { + uschar *newbuffer; + big_buffer_size += BIG_BUFFER_SIZE; + newbuffer = store_malloc(big_buffer_size); + + /* This use of strcpy is OK because we know that the string in the old + buffer is shorter than the new buffer. */ + + Ustrcpy(newbuffer, big_buffer); + store_free(big_buffer); + big_buffer = newbuffer; + if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL) + break; + newlen += Ustrlen(big_buffer + newlen); + } + + ss = macros_expand(len, &newlen, ¯o_found); + + /* Check for comment lines - these are physical lines. */ + + if (*ss == '#') continue; + + /* Handle conditionals, which are also applied to physical lines. Conditions + are of the form ".ifdef ANYTEXT" and are treated as true if any macro + expansion occurred on the rest of the line. A preliminary test for the leading + '.' saves effort on most lines. */ + + if (*ss == '.') + { + int i; + + /* Search the list of conditional directives */ + + for (i = 0; i < cond_list_size; i++) + { + int n; + cond_item *c = cond_list+i; + if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue; + + /* The following character must be white space or end of string */ + + n = ss[1 + c->namelen]; + if (n != ' ' && n != 't' && n != '\n' && n != 0) break; + + /* .ifdef and .ifndef push the current state onto the stack, then set + a new one from the table. Stack overflow is an error */ + + if (c->pushpop > 0) + { + if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + ".%s nested too deeply", c->name); + cstate_stack[++cstate_stack_ptr] = cstate; + cstate = next_cstate[cstate][macro_found? c->action1 : c->action2]; + } + + /* For any of the others, stack underflow is an error. The next state + comes either from the stack (.endif) or from the table. */ + + else + { + if (cstate_stack_ptr < 0) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + ".%s without matching .ifdef", c->name); + cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] : + next_cstate[cstate][macro_found? c->action1 : c->action2]; + } + + /* Having dealt with a directive, break the loop */ + + break; + } + + /* If we have handled a conditional directive, continue with the next + physical line. Otherwise, fall through. */ + + if (i < cond_list_size) continue; + } + + /* If the conditional state is not 0 (actively using these lines), ignore + this input line. */ + + if (cstate != 0) continue; /* Conditional skip */ + + /* Handle .include lines - these are also physical lines. */ + + if (Ustrncmp(ss, ".include", 8) == 0 && + (isspace(ss[8]) || + (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18])))) + { + uschar *t; + int include_if_exists = isspace(ss[8])? 0 : 10; + config_file_item *save; + struct stat statbuf; + + ss += 9 + include_if_exists; + while (isspace(*ss)) ss++; + t = ss + Ustrlen(ss); + while (t > ss && isspace(t[-1])) t--; + if (*ss == '\"' && t[-1] == '\"') + { + ss++; + t--; + } + *t = 0; + + /* We allow relative file names. For security reasons currently + relative names not allowed with .include_if_exists. For .include_if_exists + we need to check the permissions/ownership of the containing folder */ + if (*ss != '/') + if (include_if_exists) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-" + "absolute path \"%s\"", ss); + else + { + gstring * g = string_append(NULL, 3, config_directory, "/", ss); + ss = string_from_gstring(g); + } + + if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue; + + if (config_lines) + save_config_position(config_filename, config_lineno); + save = store_get(sizeof(config_file_item)); + save->next = config_file_stack; + config_file_stack = save; + save->file = config_file; + save->filename = config_filename; + save->directory = config_directory; + save->lineno = config_lineno; + + if (!(config_file = Ufopen(ss, "rb"))) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included " + "configuration file %s", ss); + + config_filename = string_copy(ss); + config_directory = string_copyn(ss, CUstrrchr(ss, '/') - ss); + config_lineno = 0; + continue; + } + + /* If this is the start of the logical line, remember where the non-blank + data starts. Otherwise shuffle down continuation lines to remove leading + white space. */ + + if (len == 0) + startoffset = ss - big_buffer; + else + { + s = big_buffer + len; + if (ss > s) + { + memmove(s, ss, (newlen - len) - (ss - s) + 1); + newlen -= ss - s; + } + } + + /* Accept the new addition to the line. Remove trailing white space. */ + + len = newlen; + while (len > 0 && isspace(big_buffer[len-1])) len--; + big_buffer[len] = 0; + + /* We are done if the line does not end in backslash and contains some data. + Empty logical lines are ignored. For continuations, remove the backslash and + go round the loop to read the continuation line. */ + + if (len > 0) + { + if (big_buffer[len-1] != '\\') break; /* End of logical line */ + big_buffer[--len] = 0; /* Remove backslash */ + } + } /* Loop for reading multiple physical lines */ + +/* We now have a logical line. Test for the end of a configuration section (or, +more accurately, for the start of the next section). Place the name of the next +section in next_section, and return NULL. If the name given is longer than +next_section, truncate it. It will be unrecognized later, because all the known +section names do fit. Leave space for pluralizing. */ + +s = big_buffer + startoffset; /* First non-space character */ + +if (config_lines) + save_config_line(s); + +if (strncmpic(s, US"begin ", 6) == 0) + { + s += 6; + while (isspace(*s)) s++; + if (big_buffer + len - s > sizeof(next_section) - 2) + s[sizeof(next_section) - 2] = 0; + Ustrcpy(next_section, s); + return NULL; + } + +/* Return the first non-blank character. */ + +return s; +} + + + +/************************************************* +* Read a name * +*************************************************/ + +/* The yield is the pointer to the next uschar. Names longer than the +output space are silently truncated. This function is also used from acl.c when +parsing ACLs. + +Arguments: + name where to put the name + len length of name + s input pointer + +Returns: new input pointer +*/ + +uschar * +readconf_readname(uschar *name, int len, uschar *s) +{ +int p = 0; +while (isspace(*s)) s++; +if (isalpha(*s)) + { + while (isalnum(*s) || *s == '_') + { + if (p < len-1) name[p++] = *s; + s++; + } + } +name[p] = 0; +while (isspace(*s)) s++; +return s; +} + + + + +/************************************************* +* Read a time value * +*************************************************/ + +/* This function is also called from outside, to read argument +time values. The format of a time value is: + + [<n>w][<n>d][<n>h][<n>m][<n>s] + +as long as at least one is present. If a format error is encountered, +return a negative value. The value must be terminated by the given +terminator. + +Arguments: + s input pointer + terminator required terminating character + return_msec if TRUE, allow fractional seconds and return milliseconds + +Returns: the time value, or -1 on syntax error + value is seconds if return_msec is FALSE + value is milliseconds if return_msec is TRUE +*/ + +int +readconf_readtime(const uschar *s, int terminator, BOOL return_msec) +{ +int yield = 0; +for (;;) + { + int value, count; + double fraction; + + if (!isdigit(*s)) return -1; + (void)sscanf(CCS s, "%d%n", &value, &count); + s += count; + + switch (*s) + { + case 'w': value *= 7; + case 'd': value *= 24; + case 'h': value *= 60; + case 'm': value *= 60; + case 's': s++; + break; + + case '.': + if (!return_msec) return -1; + (void)sscanf(CCS s, "%lf%n", &fraction, &count); + s += count; + if (*s++ != 's') return -1; + yield += (int)(fraction * 1000.0); + break; + + default: return -1; + } + + if (return_msec) value *= 1000; + yield += value; + if (*s == terminator) return yield; + } +/* Control never reaches here. */ +} + + + +/************************************************* +* Read a fixed point value * +*************************************************/ + +/* The value is returned *1000 + +Arguments: + s input pointer + terminator required terminator + +Returns: the value, or -1 on error +*/ + +static int +readconf_readfixed(const uschar *s, int terminator) +{ +int yield = 0; +int value, count; +if (!isdigit(*s)) return -1; +(void)sscanf(CS s, "%d%n", &value, &count); +s += count; +yield = value * 1000; +if (*s == '.') + { + int m = 100; + while (isdigit((*(++s)))) + { + yield += (*s - '0') * m; + m /= 10; + } + } + +return (*s == terminator)? yield : (-1); +} + + + +/************************************************* +* Find option in list * +*************************************************/ + +/* The lists are always in order, so binary chop can be used. + +Arguments: + name the option name to search for + ol the first entry in the option list + last one more than the offset of the last entry in the option list + +Returns: pointer to an option entry, or NULL if not found +*/ + +static optionlist * +find_option(uschar *name, optionlist *ol, int last) +{ +int first = 0; +while (last > first) + { + int middle = (first + last)/2; + int c = Ustrcmp(name, ol[middle].name); + + if (c == 0) return ol + middle; + else if (c > 0) first = middle + 1; + else last = middle; + } +return NULL; +} + + + +/************************************************* +* Find a set flag in option list * +*************************************************/ + +/* Because some versions of Unix make no restrictions on the values of uids and +gids (even negative ones), we cannot represent "unset" by a special value. +There is therefore a separate boolean variable for each one indicating whether +a value is set or not. This function returns a pointer to the boolean, given +the original option name. It is a major disaster if the flag cannot be found. + +Arguments: + name the name of the uid or gid option + oltop points to the start of the relevant option list + last one more than the offset of the last item in the option list + data_block NULL when reading main options => data values in the option + list are absolute addresses; otherwise they are byte offsets + in data_block (used for driver options) + +Returns: a pointer to the boolean flag. +*/ + +static BOOL * +get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block) +{ +optionlist *ol; +uschar name2[64]; +sprintf(CS name2, "*set_%.50s", name); +ol = find_option(name2, oltop, last); +if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE, + "Exim internal error: missing set flag for %s", name); +return (data_block == NULL)? (BOOL *)(ol->value) : + (BOOL *)(US data_block + (long int)(ol->value)); +} + + + + +/************************************************* +* Output extra characters message and die * +*************************************************/ + +/* Called when an option line has junk on the end. Sometimes this is because +the sysadmin thinks comments are permitted. + +Arguments: + s points to the extra characters + t1..t3 strings to insert in the log message + +Returns: doesn't return; dies +*/ + +static void +extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3) +{ +uschar *comment = US""; +if (*s == '#') comment = US" (# is comment only at line start)"; +log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "extra characters follow %s%s%s%s", t1, t2, t3, comment); +} + + + +/************************************************* +* Read rewrite information * +*************************************************/ + +/* Each line of rewrite information contains: + +. A complete address in the form user@domain, possibly with + leading * for each part; or alternatively, a regex. + +. A replacement string (which will be expanded). + +. An optional sequence of one-letter flags, indicating which + headers etc. to apply this rule to. + +All this is decoded and placed into a control block. The OR of the flags is +maintained in a common word. + +Arguments: + p points to the string that makes up the rule + existflags points to the overall flag word + isglobal TRUE if reading global rewrite rules + +Returns: the control block for the parsed rule. +*/ + +static rewrite_rule * +readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal) +{ +rewrite_rule *next = store_get(sizeof(rewrite_rule)); + +next->next = NULL; +next->key = string_dequote(&p); + +while (isspace(*p)) p++; +if (*p == 0) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "missing rewrite replacement string"); + +next->flags = 0; +next->replacement = string_dequote(&p); + +while (*p != 0) switch (*p++) + { + case ' ': case '\t': break; + + case 'q': next->flags |= rewrite_quit; break; + case 'w': next->flags |= rewrite_whole; break; + + case 'h': next->flags |= rewrite_all_headers; break; + case 's': next->flags |= rewrite_sender; break; + case 'f': next->flags |= rewrite_from; break; + case 't': next->flags |= rewrite_to; break; + case 'c': next->flags |= rewrite_cc; break; + case 'b': next->flags |= rewrite_bcc; break; + case 'r': next->flags |= rewrite_replyto; break; + + case 'E': next->flags |= rewrite_all_envelope; break; + case 'F': next->flags |= rewrite_envfrom; break; + case 'T': next->flags |= rewrite_envto; break; + + case 'Q': next->flags |= rewrite_qualify; break; + case 'R': next->flags |= rewrite_repeat; break; + + case 'S': + next->flags |= rewrite_smtp; + if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "rewrite rule has the S flag but is not a regular expression"); + break; + + default: + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "unknown rewrite flag character '%c' " + "(could be missing quotes round replacement item)", p[-1]); + break; + } + +/* If no action flags are set, set all the "normal" rewrites. */ + +if ((next->flags & (rewrite_all | rewrite_smtp)) == 0) + next->flags |= isglobal? rewrite_all : rewrite_all_headers; + +/* Remember which exist, for optimization, and return the rule */ + +*existflags |= next->flags; +return next; +} + + + + +/************************************************* +* Read global rewrite information * +*************************************************/ + +/* Each line is a single rewrite rule; it is parsed into a control block +by readconf_one_rewrite(), and its flags are ORed into the global flag +word rewrite_existflags. */ + +void +readconf_rewrites(void) +{ +rewrite_rule **chain = &global_rewrite_rules; +uschar *p; + +while ((p = get_config_line()) != NULL) + { + rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE); + *chain = next; + chain = &(next->next); + } +} + + + +/************************************************* +* Read a string * +*************************************************/ + +/* Strings are read into the normal store pool. As long we aren't too +near the end of the current block, the string will just use what is necessary +on the top of the stacking pool, because string_cat() uses the extension +mechanism. + +Argument: + s the rest of the input line + name the option name (for errors) + +Returns: pointer to the string +*/ + +static uschar * +read_string(const uschar *s, const uschar *name) +{ +uschar *yield; +const uschar *ss; + +if (*s != '\"') return string_copy(s); + +ss = s; +yield = string_dequote(&s); + +if (s == ss+1 || s[-1] != '\"') + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "missing quote at end of string value for %s", name); + +if (*s != 0) extra_chars_error(s, US"string value for ", name, US""); + +return yield; +} + + +/************************************************* +* Custom-handler options * +*************************************************/ +static void +fn_smtp_receive_timeout(const uschar * name, const uschar * str) +{ +if (*str == '$') + smtp_receive_timeout_s = string_copy(str); +else + { + /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */ + smtp_receive_timeout = readconf_readtime(str, 0, FALSE); + if (smtp_receive_timeout < 0) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s", + name); + } +} + +/************************************************* +* Handle option line * +*************************************************/ + +/* This function is called from several places to process a line containing the +setting of an option. The first argument is the line to be decoded; it has been +checked not to be empty and not to start with '#'. Trailing newlines and white +space have been removed. The second argument is a pointer to the list of +variable names that are to be recognized, together with their types and +locations, and the third argument gives the number of entries in the list. + +The fourth argument is a pointer to a data block. If it is NULL, then the data +values in the options list are absolute addresses. Otherwise, they are byte +offsets in the data block. + +String option data may continue onto several lines; this function reads further +data from config_file if necessary. + +The yield of this function is normally zero. If a string continues onto +multiple lines, then the data value is permitted to be followed by a comma +or a semicolon (for use in drivers) and the yield is that character. + +Arguments: + buffer contains the configuration line to be handled + oltop points to the start of the relevant option list + last one more than the offset of the last item in the option list + data_block NULL when reading main options => data values in the option + list are absolute addresses; otherwise they are byte offsets + in data_block when they have opt_public set; otherwise + they are byte offsets in data_block->options_block. + unknown_txt format string to use in panic message for unknown option; + must contain %s for option name + if given as NULL, don't panic on unknown option + +Returns: TRUE if an option was read successfully, + FALSE false for an unknown option if unknown_txt == NULL, + otherwise panic and die on an unknown option +*/ + +static BOOL +readconf_handle_option(uschar *buffer, optionlist *oltop, int last, + void *data_block, uschar *unknown_txt) +{ +int ptr = 0; +int offset = 0; +int n, count, type, value; +int issecure = 0; +uid_t uid; +gid_t gid; +BOOL boolvalue = TRUE; +BOOL freesptr = TRUE; +optionlist *ol, *ol2; +struct passwd *pw; +void *reset_point; +int intbase = 0; +uschar *inttype = US""; +uschar *sptr; +uschar *s = buffer; +uschar **str_target; +uschar name[64]; +uschar name2[64]; + +/* There may be leading spaces; thereafter, we expect an option name starting +with a letter. */ + +while (isspace(*s)) s++; +if (!isalpha(*s)) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s); + +/* Read the name of the option, and skip any subsequent white space. If +it turns out that what we read was "hide", set the flag indicating that +this is a secure option, and loop to read the next word. */ + +for (n = 0; n < 2; n++) + { + while (isalnum(*s) || *s == '_') + { + if (ptr < sizeof(name)-1) name[ptr++] = *s; + s++; + } + name[ptr] = 0; + while (isspace(*s)) s++; + if (Ustrcmp(name, "hide") != 0) break; + issecure = opt_secure; + ptr = 0; + } + +/* Deal with "no_" or "not_" here for booleans */ + +if (Ustrncmp(name, "no_", 3) == 0) + { + boolvalue = FALSE; + offset = 3; + } + +if (Ustrncmp(name, "not_", 4) == 0) + { + boolvalue = FALSE; + offset = 4; + } + +/* Search the list for the given name. A non-existent name, or an option that +is set twice, is a disaster. */ + +if (!(ol = find_option(name + offset, oltop, last))) + { + if (unknown_txt == NULL) return FALSE; + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name); + } + +if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str))) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "\"%s\" option set for the second time", name); + +ol->type |= opt_set | issecure; +type = ol->type & opt_mask; + +/* Types with data values must be followed by '='; the "no[t]_" prefix +applies only to boolean values. */ + +if (type < opt_bool || type > opt_bool_last) + { + if (offset != 0) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "negation prefix applied to a non-boolean option"); + if (*s == 0) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "unexpected end of line (data missing) after %s", name); + if (*s != '=') + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name); + } + +/* If a boolean wasn't preceded by "no[t]_" it can be followed by = and +true/false/yes/no, or, in the case of opt_expand_bool, a general string that +ultimately expands to one of those values. */ + +else if (*s != 0 && (offset != 0 || *s != '=')) + extra_chars_error(s, US"boolean option ", name, US""); + +/* Skip white space after = */ + +if (*s == '=') while (isspace((*(++s)))); + +/* If there is a data block and the opt_public flag is not set, change +the data block pointer to the private options block. */ + +if (data_block != NULL && (ol->type & opt_public) == 0) + data_block = (void *)(((driver_instance *)data_block)->options_block); + +/* Now get the data according to the type. */ + +switch (type) + { + /* If a string value is not enclosed in quotes, it consists of + the rest of the current line, verbatim. Otherwise, string escapes + are processed. + + A transport is specified as a string, which is then looked up in the + list of transports. A search type is specified as one of a number of + known strings. + + A set or rewrite rules for a driver is specified as a string, which is + then parsed into a suitable chain of control blocks. + + Uids and gids are specified as strings which are then looked up in the + passwd file. Lists of uids and gids are similarly specified as colon- + separated strings. */ + + case opt_stringptr: + case opt_uid: + case opt_gid: + case opt_expand_uid: + case opt_expand_gid: + case opt_uidlist: + case opt_gidlist: + case opt_rewrite: + + reset_point = sptr = read_string(s, name); + + /* Having read a string, we now have several different ways of using it, + depending on the data type, so do another switch. If keeping the actual + string is not required (because it is interpreted), freesptr is set TRUE, + and at the end we reset the pool. */ + + switch (type) + { + /* If this was a string, set the variable to point to the new string, + and set the flag so its store isn't reclaimed. If it was a list of rewrite + rules, we still keep the string (for printing), and parse the rules into a + control block and flags word. */ + + case opt_stringptr: + str_target = data_block ? USS (US data_block + (long int)(ol->value)) + : USS (ol->value); + if (ol->type & opt_rep_con) + { + uschar * saved_condition; + /* We already have a condition, we're conducting a crude hack to let + multiple condition rules be chained together, despite storing them in + text form. */ + *str_target = string_copy_malloc( (saved_condition = *str_target) + ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}", + saved_condition, sptr) + : sptr); + /* TODO(pdp): there is a memory leak here and just below + when we set 3 or more conditions; I still don't + understand the store mechanism enough to know + what's the safe way to free content from an earlier store. + AFAICT, stores stack, so freeing an early stored item also stores + all data alloc'd after it. If we knew conditions were adjacent, + we could survive that, but we don't. So I *think* we need to take + another bit from opt_type to indicate "malloced"; this seems like + quite a hack, especially for this one case. It also means that + we can't ever reclaim the store from the *first* condition. + + Because we only do this once, near process start-up, I'm prepared to + let this slide for the time being, even though it rankles. */ + } + else if (ol->type & opt_rep_str) + { + uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':'; + int sep_i = -(int)sep_o; + const uschar * list = sptr; + uschar * s; + gstring * list_o = NULL; + + if (*str_target) + { + list_o = string_get(Ustrlen(*str_target) + Ustrlen(sptr)); + list_o = string_cat(list_o, *str_target); + } + + while ((s = string_nextinlist(&list, &sep_i, NULL, 0))) + list_o = string_append_listele(list_o, sep_o, s); + + if (list_o) + *str_target = string_copy_malloc(string_from_gstring(list_o)); + } + else + { + *str_target = sptr; + freesptr = FALSE; + } + break; + + case opt_rewrite: + if (data_block) + *USS (US data_block + (long int)(ol->value)) = sptr; + else + *USS (ol->value) = sptr; + freesptr = FALSE; + if (type == opt_rewrite) + { + int sep = 0; + int *flagptr; + uschar *p = sptr; + rewrite_rule **chain; + optionlist *ol3; + + sprintf(CS name2, "*%.50s_rules", name); + ol2 = find_option(name2, oltop, last); + sprintf(CS name2, "*%.50s_flags", name); + ol3 = find_option(name2, oltop, last); + + if (ol2 == NULL || ol3 == NULL) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "rewrite rules not available for driver"); + + if (data_block == NULL) + { + chain = (rewrite_rule **)(ol2->value); + flagptr = (int *)(ol3->value); + } + else + { + chain = (rewrite_rule **)(US data_block + (long int)(ol2->value)); + flagptr = (int *)(US data_block + (long int)(ol3->value)); + } + + while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE))) + { + rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE); + *chain = next; + chain = &(next->next); + } + + if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a " + "non-header rewrite - not allowed at transport time -"); + } + break; + + /* If it was an expanded uid, see if there is any expansion to be + done by checking for the presence of a $ character. If there is, save it + in the corresponding *expand_user option field. Otherwise, fall through + to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds + of data. */ + + case opt_expand_uid: + sprintf(CS name2, "*expand_%.50s", name); + ol2 = find_option(name2, oltop, last); + if (ol2 != NULL) + { + uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL; + + if (data_block == NULL) + *((uschar **)(ol2->value)) = ss; + else + *((uschar **)(US data_block + (long int)(ol2->value))) = ss; + + if (ss != NULL) + { + *(get_set_flag(name, oltop, last, data_block)) = FALSE; + freesptr = FALSE; + break; + } + } + + /* Look up a fixed uid, and also make use of the corresponding gid + if a passwd entry is returned and the gid has not been set. */ + + case opt_uid: + if (!route_finduser(sptr, &pw, &uid)) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr); + if (data_block == NULL) + *((uid_t *)(ol->value)) = uid; + else + *((uid_t *)(US data_block + (long int)(ol->value))) = uid; + + /* Set the flag indicating a fixed value is set */ + + *(get_set_flag(name, oltop, last, data_block)) = TRUE; + + /* Handle matching gid if we have a passwd entry: done by finding the + same name with terminating "user" changed to "group"; if not found, + ignore. Also ignore if the value is already set. */ + + if (pw == NULL) break; + Ustrcpy(name+Ustrlen(name)-4, "group"); + ol2 = find_option(name, oltop, last); + if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid || + (ol2->type & opt_mask) == opt_expand_gid)) + { + BOOL *set_flag = get_set_flag(name, oltop, last, data_block); + if (! *set_flag) + { + if (data_block == NULL) + *((gid_t *)(ol2->value)) = pw->pw_gid; + else + *((gid_t *)(US data_block + (long int)(ol2->value))) = pw->pw_gid; + *set_flag = TRUE; + } + } + break; + + /* If it was an expanded gid, see if there is any expansion to be + done by checking for the presence of a $ character. If there is, save it + in the corresponding *expand_user option field. Otherwise, fall through + to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds + of data. */ + + case opt_expand_gid: + sprintf(CS name2, "*expand_%.50s", name); + ol2 = find_option(name2, oltop, last); + if (ol2 != NULL) + { + uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL; + + if (data_block == NULL) + *((uschar **)(ol2->value)) = ss; + else + *((uschar **)(US data_block + (long int)(ol2->value))) = ss; + + if (ss != NULL) + { + *(get_set_flag(name, oltop, last, data_block)) = FALSE; + freesptr = FALSE; + break; + } + } + + /* Handle freestanding gid */ + + case opt_gid: + if (!route_findgroup(sptr, &gid)) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr); + if (data_block == NULL) + *((gid_t *)(ol->value)) = gid; + else + *((gid_t *)(US data_block + (long int)(ol->value))) = gid; + *(get_set_flag(name, oltop, last, data_block)) = TRUE; + break; + + /* If it was a uid list, look up each individual entry, and build + a vector of uids, with a count in the first element. Put the vector + in malloc store so we can free the string. (We are reading into + permanent store already.) */ + + case opt_uidlist: + { + int count = 1; + uid_t *list; + int ptr = 0; + const uschar *p; + const uschar *op = expand_string (sptr); + + if (op == NULL) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s", + name, expand_string_message); + + p = op; + if (*p != 0) count++; + while (*p != 0) if (*p++ == ':' && *p != 0) count++; + list = store_malloc(count*sizeof(uid_t)); + list[ptr++] = (uid_t)(count - 1); + + if (data_block == NULL) + *((uid_t **)(ol->value)) = list; + else + *((uid_t **)(US data_block + (long int)(ol->value))) = list; + + p = op; + while (count-- > 1) + { + int sep = 0; + (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE); + if (!route_finduser(big_buffer, NULL, &uid)) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", + big_buffer); + list[ptr++] = uid; + } + } + break; + + /* If it was a gid list, look up each individual entry, and build + a vector of gids, with a count in the first element. Put the vector + in malloc store so we can free the string. (We are reading into permanent + store already.) */ + + case opt_gidlist: + { + int count = 1; + gid_t *list; + int ptr = 0; + const uschar *p; + const uschar *op = expand_string (sptr); + + if (op == NULL) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s", + name, expand_string_message); + + p = op; + if (*p != 0) count++; + while (*p != 0) if (*p++ == ':' && *p != 0) count++; + list = store_malloc(count*sizeof(gid_t)); + list[ptr++] = (gid_t)(count - 1); + + if (data_block == NULL) + *((gid_t **)(ol->value)) = list; + else + *((gid_t **)(US data_block + (long int)(ol->value))) = list; + + p = op; + while (count-- > 1) + { + int sep = 0; + (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE); + if (!route_findgroup(big_buffer, &gid)) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", + big_buffer); + list[ptr++] = gid; + } + } + break; + } + + /* Release store if the value of the string doesn't need to be kept. */ + + if (freesptr) store_reset(reset_point); + break; + + /* Expanded boolean: if no characters follow, or if there are no dollar + characters, this is a fixed-valued boolean, and we fall through. Otherwise, + save the string for later expansion in the alternate place. */ + + case opt_expand_bool: + if (*s != 0 && Ustrchr(s, '$') != 0) + { + sprintf(CS name2, "*expand_%.50s", name); + ol2 = find_option(name2, oltop, last); + if (ol2 != NULL) + { + reset_point = sptr = read_string(s, name); + if (data_block == NULL) + *((uschar **)(ol2->value)) = sptr; + else + *((uschar **)(US data_block + (long int)(ol2->value))) = sptr; + freesptr = FALSE; + break; + } + } + /* Fall through */ + + /* Boolean: if no characters follow, the value is boolvalue. Otherwise + look for yes/not/true/false. Some booleans are stored in a single bit in + a single int. There's a special fudge for verify settings; without a suffix + they set both xx_sender and xx_recipient. The table points to the sender + value; search subsequently for the recipient. There's another special case: + opt_bool_set also notes when a boolean has been set. */ + + case opt_bool: + case opt_bit: + case opt_bool_verify: + case opt_bool_set: + if (*s != 0) + { + s = readconf_readname(name2, 64, s); + if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0) + boolvalue = TRUE; + else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0) + boolvalue = FALSE; + else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "\"%s\" is not a valid value for the \"%s\" option", name2, name); + if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2), + US"for boolean option ", name); + } + + /* Handle single-bit type. */ + + if (type == opt_bit) + { + int bit = 1 << ((ol->type >> 16) & 31); + int *ptr = (data_block == NULL)? + (int *)(ol->value) : + (int *)(US data_block + (long int)ol->value); + if (boolvalue) *ptr |= bit; else *ptr &= ~bit; + break; + } + + /* Handle full BOOL types */ + + if (data_block == NULL) + *((BOOL *)(ol->value)) = boolvalue; + else + *((BOOL *)(US data_block + (long int)(ol->value))) = boolvalue; + + /* Verify fudge */ + + if (type == opt_bool_verify) + { + sprintf(CS name2, "%.50s_recipient", name + offset); + ol2 = find_option(name2, oltop, last); + if (ol2 != NULL) + { + if (data_block == NULL) + *((BOOL *)(ol2->value)) = boolvalue; + else + *((BOOL *)(US data_block + (long int)(ol2->value))) = boolvalue; + } + } + + /* Note that opt_bool_set type is set, if there is somewhere to do so */ + + else if (type == opt_bool_set) + { + sprintf(CS name2, "*set_%.50s", name + offset); + ol2 = find_option(name2, oltop, last); + if (ol2 != NULL) + { + if (data_block == NULL) + *((BOOL *)(ol2->value)) = TRUE; + else + *((BOOL *)(US data_block + (long int)(ol2->value))) = TRUE; + } + } + break; + + /* Octal integer */ + + case opt_octint: + intbase = 8; + inttype = US"octal "; + + /* Integer: a simple(ish) case; allow octal and hex formats, and + suffixes K, M, G, and T. The different types affect output, not input. */ + + case opt_mkint: + case opt_int: + { + uschar *endptr; + long int lvalue; + + errno = 0; + lvalue = strtol(CS s, CSS &endptr, intbase); + + if (endptr == s) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s", + inttype, name); + + if (errno != ERANGE && *endptr) + { + uschar * mp = US"TtGgMmKk\0"; /* YyZzEePpTtGgMmKk */ + + if ((mp = Ustrchr(mp, *endptr))) + { + endptr++; + do + { + if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) + { + errno = ERANGE; + break; + } + lvalue *= 1024; + } + while (*(mp += 2)); + } + } + + if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "absolute value of integer \"%s\" is too large (overflow)", s); + + while (isspace(*endptr)) endptr++; + if (*endptr) + extra_chars_error(endptr, inttype, US"integer value for ", name); + + value = (int)lvalue; + } + + if (data_block) + *(int *)(US data_block + (long int)ol->value) = value; + else + *(int *)ol->value = value; + break; + + /* Integer held in K: again, allow formats and suffixes as above. */ + + case opt_Kint: + { + uschar *endptr; + errno = 0; + int_eximarith_t lvalue = strtol(CS s, CSS &endptr, intbase); + + if (endptr == s) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s", + inttype, name); + + if (errno != ERANGE && *endptr) + { + uschar * mp = US"ZzEePpTtGgMmKk\0"; /* YyZzEePpTtGgMmKk */ + + if ((mp = Ustrchr(mp, *endptr))) + { + endptr++; + while (*(mp += 2)) + { + if (lvalue > EXIM_ARITH_MAX/1024 || lvalue < EXIM_ARITH_MIN/1024) + { + errno = ERANGE; + break; + } + lvalue *= 1024; + } + } + else + lvalue = (lvalue + 512)/1024; + } + + if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "absolute value of integer \"%s\" is too large (overflow)", s); + + while (isspace(*endptr)) endptr++; + if (*endptr != 0) + extra_chars_error(endptr, inttype, US"integer value for ", name); + + if (data_block) + *(int_eximarith_t *)(US data_block + (long int)ol->value) = lvalue; + else + *(int_eximarith_t *)ol->value = lvalue; + break; + } + + /* Fixed-point number: held to 3 decimal places. */ + + case opt_fixed: + if (sscanf(CS s, "%d%n", &value, &count) != 1) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "fixed-point number expected for %s", name); + + if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "integer \"%s\" is too large (overflow)", s); + + value *= 1000; + + if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "integer \"%s\" is too large (overflow)", s); + + /* We get a coverity error here for using count, as it derived + from the tainted buffer pointed to by s, as parsed by sscanf(). + By the definition of sscanf we must be accessing between start + and end of s (assuming it is nul-terminated...) so ignore the error. */ + /* coverity[tainted_data] */ + if (s[count] == '.') + { + int d = 100; + while (isdigit(s[++count])) + { + value += (s[count] - '0') * d; + d /= 10; + } + } + + while (isspace(s[count])) count++; + + if (s[count] != 0) + extra_chars_error(s+count, US"fixed-point value for ", name, US""); + + if (data_block == NULL) + *((int *)(ol->value)) = value; + else + *((int *)(US data_block + (long int)(ol->value))) = value; + break; + + /* There's a special routine to read time values. */ + + case opt_time: + value = readconf_readtime(s, 0, FALSE); + if (value < 0) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s", + name); + if (data_block == NULL) + *((int *)(ol->value)) = value; + else + *((int *)(US data_block + (long int)(ol->value))) = value; + break; + + /* A time list is a list of colon-separated times, with the first + element holding the size of the list and the second the number of + entries used. */ + + case opt_timelist: + { + int count = 0; + int *list = (data_block == NULL)? + (int *)(ol->value) : + (int *)(US data_block + (long int)(ol->value)); + + if (*s != 0) for (count = 1; count <= list[0] - 2; count++) + { + int terminator = 0; + uschar *snext = Ustrchr(s, ':'); + if (snext != NULL) + { + uschar *ss = snext; + while (ss > s && isspace(ss[-1])) ss--; + terminator = *ss; + } + value = readconf_readtime(s, terminator, FALSE); + if (value < 0) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s", + name); + if (count > 1 && value <= list[count]) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "time value out of order for %s", name); + list[count+1] = value; + if (snext == NULL) break; + s = snext + 1; + while (isspace(*s)) s++; + } + + if (count > list[0] - 2) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s", + name); + if (count > 0 && list[2] == 0) count = 0; + list[1] = count; + break; + } + + case opt_func: + { + void (*fn)() = ol->value; + fn(name, s); + break; + } + } + +return TRUE; +} + + + +/************************************************* +* Print a time value * +*************************************************/ + +/* +Argument: a time value in seconds +Returns: pointer to a fixed buffer containing the time as a string, + in readconf_readtime() format +*/ + +uschar * +readconf_printtime(int t) +{ +int s, m, h, d, w; +uschar *p = time_buffer; + +if (t < 0) + { + *p++ = '-'; + t = -t; + } + +s = t % 60; +t /= 60; +m = t % 60; +t /= 60; +h = t % 24; +t /= 24; +d = t % 7; +w = t/7; + +if (w > 0) p += sprintf(CS p, "%dw", w); +if (d > 0) p += sprintf(CS p, "%dd", d); +if (h > 0) p += sprintf(CS p, "%dh", h); +if (m > 0) p += sprintf(CS p, "%dm", m); +if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s); + +return time_buffer; +} + + + +/************************************************* +* Print an individual option value * +*************************************************/ + +/* This is used by the -bP option, so prints to the standard output. +The entire options list is passed in as an argument, because some options come +in pairs - typically uid/gid settings, which can either be explicit numerical +values, or strings to be expanded later. If the numerical value is unset, +search for "*expand_<name>" to see if there is a string equivalent. + +Arguments: + ol option entry, or NULL for an unknown option + name option name + options_block NULL for main configuration options; otherwise points to + a driver block; if the option doesn't have opt_public + set, then options_block->options_block is where the item + resides. + oltop points to the option list in which ol exists + last one more than the offset of the last entry in optop + no_labels do not show "foo = " at the start. + +Returns: boolean success +*/ + +static BOOL +print_ol(optionlist *ol, uschar *name, void *options_block, + optionlist *oltop, int last, BOOL no_labels) +{ +struct passwd *pw; +struct group *gr; +optionlist *ol2; +void *value; +uid_t *uidlist; +gid_t *gidlist; +uschar *s; +uschar name2[64]; + +if (!ol) + { + printf("%s is not a known option\n", name); + return FALSE; + } + +/* Non-admin callers cannot see options that have been flagged secure by the +"hide" prefix. */ + +if (!f.admin_user && ol->type & opt_secure) + { + if (no_labels) + printf("%s\n", hidden); + else + printf("%s = %s\n", name, hidden); + return TRUE; + } + +/* Else show the value of the option */ + +value = ol->value; +if (options_block) + { + if (!(ol->type & opt_public)) + options_block = (void *)(((driver_instance *)options_block)->options_block); + value = (void *)(US options_block + (long int)value); + } + +switch(ol->type & opt_mask) + { + case opt_stringptr: + case opt_rewrite: /* Show the text value */ + s = *(USS value); + if (!no_labels) printf("%s = ", name); + printf("%s\n", s ? string_printing2(s, FALSE) : US""); + break; + + case opt_int: + if (!no_labels) printf("%s = ", name); + printf("%d\n", *((int *)value)); + break; + + case opt_mkint: + { + int x = *((int *)value); + if (x != 0 && (x & 1023) == 0) + { + int c = 'K'; + x >>= 10; + if ((x & 1023) == 0) + { + c = 'M'; + x >>= 10; + } + if (!no_labels) printf("%s = ", name); + printf("%d%c\n", x, c); + } + else + { + if (!no_labels) printf("%s = ", name); + printf("%d\n", x); + } + } + break; + + case opt_Kint: + { + int_eximarith_t x = *((int_eximarith_t *)value); + if (!no_labels) printf("%s = ", name); + if (x == 0) printf("0\n"); + else if ((x & ((1<<30)-1)) == 0) printf(PR_EXIM_ARITH "T\n", x >> 30); + else if ((x & ((1<<20)-1)) == 0) printf(PR_EXIM_ARITH "G\n", x >> 20); + else if ((x & ((1<<10)-1)) == 0) printf(PR_EXIM_ARITH "M\n", x >> 10); + else printf(PR_EXIM_ARITH "K\n", x); + } + break; + + case opt_octint: + if (!no_labels) printf("%s = ", name); + printf("%#o\n", *((int *)value)); + break; + + /* Can be negative only when "unset", in which case integer */ + + case opt_fixed: + { + int x = *((int *)value); + int f = x % 1000; + int d = 100; + if (x < 0) printf("%s =\n", name); else + { + if (!no_labels) printf("%s = ", name); + printf("%d.", x/1000); + do + { + printf("%d", f/d); + f %= d; + d /= 10; + } + while (f != 0); + printf("\n"); + } + } + break; + + /* If the numerical value is unset, try for the string value */ + + case opt_expand_uid: + if (! *get_set_flag(name, oltop, last, options_block)) + { + sprintf(CS name2, "*expand_%.50s", name); + if ((ol2 = find_option(name2, oltop, last))) + { + void *value2 = ol2->value; + if (options_block) + value2 = (void *)(US options_block + (long int)value2); + s = *(USS value2); + if (!no_labels) printf("%s = ", name); + printf("%s\n", s ? string_printing(s) : US""); + break; + } + } + + /* Else fall through */ + + case opt_uid: + if (!no_labels) printf("%s = ", name); + if (! *get_set_flag(name, oltop, last, options_block)) + printf("\n"); + else + if ((pw = getpwuid(*((uid_t *)value)))) + printf("%s\n", pw->pw_name); + else + printf("%ld\n", (long int)(*((uid_t *)value))); + break; + + /* If the numerical value is unset, try for the string value */ + + case opt_expand_gid: + if (! *get_set_flag(name, oltop, last, options_block)) + { + sprintf(CS name2, "*expand_%.50s", name); + if ( (ol2 = find_option(name2, oltop, last)) + && (ol2->type & opt_mask) == opt_stringptr) + { + void *value2 = ol2->value; + if (options_block) + value2 = (void *)(US options_block + (long int)value2); + s = *(USS value2); + if (!no_labels) printf("%s = ", name); + printf("%s\n", s ? string_printing(s) : US""); + break; + } + } + + /* Else fall through */ + + case opt_gid: + if (!no_labels) printf("%s = ", name); + if (! *get_set_flag(name, oltop, last, options_block)) + printf("\n"); + else + if ((gr = getgrgid(*((int *)value)))) + printf("%s\n", gr->gr_name); + else + printf("%ld\n", (long int)(*((int *)value))); + break; + + case opt_uidlist: + uidlist = *((uid_t **)value); + if (!no_labels) printf("%s =", name); + if (uidlist) + { + int i; + uschar sep = no_labels ? '\0' : ' '; + for (i = 1; i <= (int)(uidlist[0]); i++) + { + uschar *name = NULL; + if ((pw = getpwuid(uidlist[i]))) name = US pw->pw_name; + if (sep != '\0') printf("%c", sep); + if (name) printf("%s", name); + else printf("%ld", (long int)(uidlist[i])); + sep = ':'; + } + } + printf("\n"); + break; + + case opt_gidlist: + gidlist = *((gid_t **)value); + if (!no_labels) printf("%s =", name); + if (gidlist) + { + int i; + uschar sep = no_labels ? '\0' : ' '; + for (i = 1; i <= (int)(gidlist[0]); i++) + { + uschar *name = NULL; + if ((gr = getgrgid(gidlist[i]))) name = US gr->gr_name; + if (sep != '\0') printf("%c", sep); + if (name) printf("%s", name); + else printf("%ld", (long int)(gidlist[i])); + sep = ':'; + } + } + printf("\n"); + break; + + case opt_time: + if (!no_labels) printf("%s = ", name); + printf("%s\n", readconf_printtime(*((int *)value))); + break; + + case opt_timelist: + { + int i; + int *list = (int *)value; + if (!no_labels) printf("%s = ", name); + for (i = 0; i < list[1]; i++) + printf("%s%s", i == 0 ? "" : ":", readconf_printtime(list[i+2])); + printf("\n"); + } + break; + + case opt_bit: + printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))? + "" : "no_", name); + break; + + case opt_expand_bool: + sprintf(CS name2, "*expand_%.50s", name); + if ((ol2 = find_option(name2, oltop, last)) && ol2->value) + { + void *value2 = ol2->value; + if (options_block) + value2 = (void *)(US options_block + (long int)value2); + s = *(USS value2); + if (s) + { + if (!no_labels) printf("%s = ", name); + printf("%s\n", string_printing(s)); + break; + } + /* s == NULL => string not set; fall through */ + } + + /* Fall through */ + + case opt_bool: + case opt_bool_verify: + case opt_bool_set: + printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name); + break; + } +return TRUE; +} + + + +/************************************************* +* Print value from main configuration * +*************************************************/ + +/* This function, called as a result of encountering the -bP option, +causes the value of any main configuration variable to be output if the +second argument is NULL. There are some special values: + + all print all main configuration options + config_file print the name of the configuration file + (configure_file will still work, for backward + compatibility) + routers print the routers' configurations + transports print the transports' configuration + authenticators print the authenticators' configuration + macros print the macros' configuration + router_list print a list of router names + transport_list print a list of transport names + authenticator_list print a list of authentication mechanism names + macro_list print a list of macro names + +name print a named list item + local_scan print the local_scan options + config print the configuration as it is parsed + environment print the used execution environment + +If the second argument is not NULL, it must be one of "router", "transport", +"authenticator" or "macro" in which case the first argument identifies the +driver whose options are to be printed. + +Arguments: + name option name if type == NULL; else driver name + type NULL or driver type name, as described above + no_labels avoid the "foo = " at the start of an item + +Returns: Boolean success +*/ + +BOOL +readconf_print(uschar *name, uschar *type, BOOL no_labels) +{ +BOOL names_only = FALSE; +optionlist *ol; +optionlist *ol2 = NULL; +driver_instance *d = NULL; +macro_item *m; +int size = 0; + +if (!type) + { + if (*name == '+') + { + int i; + tree_node *t; + BOOL found = FALSE; + static uschar *types[] = { US"address", US"domain", US"host", + US"localpart" }; + static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor, + &hostlist_anchor, &localpartlist_anchor }; + + for (i = 0; i < 4; i++) + if ((t = tree_search(*(anchors[i]), name+1))) + { + found = TRUE; + if (no_labels) + printf("%s\n", ((namedlist_block *)(t->data.ptr))->string); + else + printf("%slist %s = %s\n", types[i], name+1, + ((namedlist_block *)(t->data.ptr))->string); + } + + if (!found) + printf("no address, domain, host, or local part list called \"%s\" " + "exists\n", name+1); + + return found; + } + + if ( Ustrcmp(name, "configure_file") == 0 + || Ustrcmp(name, "config_file") == 0) + { + printf("%s\n", CS config_main_filename); + return TRUE; + } + + if (Ustrcmp(name, "all") == 0) + { + for (ol = optionlist_config; + ol < optionlist_config + nelem(optionlist_config); ol++) + if (!(ol->type & opt_hidden)) + (void) print_ol(ol, US ol->name, NULL, + optionlist_config, nelem(optionlist_config), + no_labels); + return TRUE; + } + + if (Ustrcmp(name, "local_scan") == 0) + { +#ifndef LOCAL_SCAN_HAS_OPTIONS + printf("local_scan() options are not supported\n"); + return FALSE; +#else + for (ol = local_scan_options; + ol < local_scan_options + local_scan_options_count; ol++) + (void) print_ol(ol, US ol->name, NULL, local_scan_options, + local_scan_options_count, no_labels); + return TRUE; +#endif + } + + if (Ustrcmp(name, "config") == 0) + { + print_config(f.admin_user, no_labels); + return TRUE; + } + + if (Ustrcmp(name, "routers") == 0) + { + type = US"router"; + name = NULL; + } + else if (Ustrcmp(name, "transports") == 0) + { + type = US"transport"; + name = NULL; + } + else if (Ustrcmp(name, "authenticators") == 0) + { + type = US"authenticator"; + name = NULL; + } + else if (Ustrcmp(name, "macros") == 0) + { + type = US"macro"; + name = NULL; + } + else if (Ustrcmp(name, "router_list") == 0) + { + type = US"router"; + name = NULL; + names_only = TRUE; + } + else if (Ustrcmp(name, "transport_list") == 0) + { + type = US"transport"; + name = NULL; + names_only = TRUE; + } + else if (Ustrcmp(name, "authenticator_list") == 0) + { + type = US"authenticator"; + name = NULL; + names_only = TRUE; + } + else if (Ustrcmp(name, "macro_list") == 0) + { + type = US"macro"; + name = NULL; + names_only = TRUE; + } + else if (Ustrcmp(name, "environment") == 0) + { + if (environ) + { + uschar ** p; + for (p = USS environ; *p; p++) ; + qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer); + + for (p = USS environ; *p; p++) + { + uschar * q; + if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0'; + puts(CS *p); + } + } + return TRUE; + } + + else + return print_ol(find_option(name, + optionlist_config, nelem(optionlist_config)), + name, NULL, optionlist_config, nelem(optionlist_config), no_labels); + } + +/* Handle the options for a router or transport. Skip options that are flagged +as hidden. Some of these are options with names starting with '*', used for +internal alternative representations of other options (which the printing +function will sort out). Others are synonyms kept for backward compatibility. +*/ + +if (Ustrcmp(type, "router") == 0) + { + d = (driver_instance *)routers; + ol2 = optionlist_routers; + size = optionlist_routers_size; + } +else if (Ustrcmp(type, "transport") == 0) + { + d = (driver_instance *)transports; + ol2 = optionlist_transports; + size = optionlist_transports_size; + } +else if (Ustrcmp(type, "authenticator") == 0) + { + d = (driver_instance *)auths; + ol2 = optionlist_auths; + size = optionlist_auths_size; + } + +else if (Ustrcmp(type, "macro") == 0) + { + /* People store passwords in macros and they were previously not available + for printing. So we have an admin_users restriction. */ + if (!f.admin_user) + { + fprintf(stderr, "exim: permission denied\n"); + return FALSE; + } + for (m = macros; m; m = m->next) + if (!name || Ustrcmp(name, m->name) == 0) + { + if (names_only) + printf("%s\n", CS m->name); + else if (no_labels) + printf("%s\n", CS m->replacement); + else + printf("%s=%s\n", CS m->name, CS m->replacement); + if (name) + return TRUE; + } + if (!name) return TRUE; + + printf("%s %s not found\n", type, name); + return FALSE; + } + +if (names_only) + { + for (; d; d = d->next) printf("%s\n", CS d->name); + return TRUE; + } + +/* Either search for a given driver, or print all of them */ + +for (; d; d = d->next) + { + BOOL rc = FALSE; + if (!name) + printf("\n%s %s:\n", d->name, type); + else if (Ustrcmp(d->name, name) != 0) continue; + + for (ol = ol2; ol < ol2 + size; ol++) + if (!(ol->type & opt_hidden)) + rc |= print_ol(ol, US ol->name, d, ol2, size, no_labels); + + for (ol = d->info->options; + ol < d->info->options + *(d->info->options_count); ol++) + if (!(ol->type & opt_hidden)) + rc |= print_ol(ol, US ol->name, d, d->info->options, + *d->info->options_count, no_labels); + + if (name) return rc; + } +if (!name) return TRUE; + +printf("%s %s not found\n", type, name); +return FALSE; +} + + + +/************************************************* +* Read a named list item * +*************************************************/ + +/* This function reads a name and a list (i.e. string). The name is used to +save the list in a tree, sorted by its name. Each entry also has a number, +which can be used for caching tests, but if the string contains any expansion +items other than $key, the number is set negative to inhibit caching. This +mechanism is used for domain, host, and address lists that are referenced by +the "+name" syntax. + +Arguments: + anchorp points to the tree anchor + numberp points to the current number for this tree + max the maximum number permitted + s the text of the option line, starting immediately after the name + of the list type + tname the name of the list type, for messages + +Returns: nothing +*/ + +static void +read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s, + uschar *tname) +{ +BOOL forcecache = FALSE; +uschar *ss; +tree_node *t; +namedlist_block *nb = store_get(sizeof(namedlist_block)); + +if (Ustrncmp(s, "_cache", 6) == 0) + { + forcecache = TRUE; + s += 6; + } + +if (!isspace(*s)) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line"); + +if (*numberp >= max) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n", + tname, max); + +while (isspace(*s)) s++; +ss = s; +while (isalnum(*s) || *s == '_') s++; +t = store_get(sizeof(tree_node) + s-ss); +Ustrncpy(t->name, ss, s-ss); +t->name[s-ss] = 0; +while (isspace(*s)) s++; + +if (!tree_insertnode(anchorp, t)) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "duplicate name \"%s\" for a named %s", t->name, tname); + +t->data.ptr = nb; +nb->number = *numberp; +*numberp += 1; + +if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "missing '=' after \"%s\"", t->name); +while (isspace(*s)) s++; +nb->string = read_string(s, t->name); +nb->cache_data = NULL; + +/* Check the string for any expansions; if any are found, mark this list +uncacheable unless the user has explicited forced caching. */ + +if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1; +} + + + + +/************************************************* +* Unpick data for a rate limit * +*************************************************/ + +/* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four +separate values. + +Arguments: + s string, in the form t,b,f,l + where t is the threshold (integer) + b is the initial delay (time) + f is the multiplicative factor (fixed point) + k is the maximum time (time) + threshold where to store threshold + base where to store base in milliseconds + factor where to store factor in milliseconds + limit where to store limit + +Returns: nothing (panics on error) +*/ + +static void +unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor, + int *limit) +{ +uschar bstring[16], lstring[16]; + +if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring, + factor, lstring) == 4) + { + *base = readconf_readtime(bstring, 0, TRUE); + *limit = readconf_readtime(lstring, 0, TRUE); + if (*base >= 0 && *limit >= 0) return; + } +log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s); +} + + + + +/************************************************* +* Drop privs for checking TLS config * +*************************************************/ + +/* We want to validate TLS options during readconf, but do not want to be +root when we call into the TLS library, in case of library linkage errors +which cause segfaults; before this check, those were always done as the Exim +runtime user and it makes sense to continue with that. + +Assumes: tls_require_ciphers has been set, if it will be + exim_user has been set, if it will be + exim_group has been set, if it will be + +Returns: bool for "okay"; false will cause caller to immediately exit. +*/ + +#ifdef SUPPORT_TLS +static BOOL +tls_dropprivs_validate_require_cipher(BOOL nowarn) +{ +const uschar *errmsg; +pid_t pid; +int rc, status; +void (*oldsignal)(int); + +/* If TLS will never be used, no point checking ciphers */ + +if ( !tls_advertise_hosts + || !*tls_advertise_hosts + || Ustrcmp(tls_advertise_hosts, ":") == 0 + ) + return TRUE; +else if (!nowarn && !tls_certificate) + log_write(0, LOG_MAIN, + "Warning: No server certificate defined; will use a selfsigned one.\n" + " Suggested action: either install a certificate or change tls_advertise_hosts option"); + +oldsignal = signal(SIGCHLD, SIG_DFL); + +fflush(NULL); +if ((pid = fork()) < 0) + log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check"); + +if (pid == 0) + { + /* in some modes, will have dropped privilege already */ + if (!geteuid()) + exim_setugid(exim_uid, exim_gid, FALSE, + US"calling tls_validate_require_cipher"); + + if ((errmsg = tls_validate_require_cipher())) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG, + "tls_require_ciphers invalid: %s", errmsg); + fflush(NULL); + _exit(0); + } + +do { + rc = waitpid(pid, &status, 0); +} while (rc < 0 && errno == EINTR); + +DEBUG(D_tls) + debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n", + (int)pid, status); + +signal(SIGCHLD, oldsignal); + +return status == 0; +} +#endif /* SUPPORT_TLS */ + + + + +/************************************************* +* Read main configuration options * +*************************************************/ + +/* This function is the first to be called for configuration reading. It +opens the configuration file and reads general configuration settings until +it reaches the end of the configuration section. The file is then left open so +that the remaining configuration data can subsequently be read if needed for +this run of Exim. + +The configuration file must be owned either by root or exim, and be writeable +only by root or uid/gid exim. The values for Exim's uid and gid can be changed +in the config file, so the test is done on the compiled in values. A slight +anomaly, to be carefully documented. + +The name of the configuration file is taken from a list that is included in the +binary of Exim. It can be altered from the command line, but if that is done, +root privilege is immediately withdrawn unless the caller is root or exim. +The first file on the list that exists is used. + +For use on multiple systems that share file systems, first look for a +configuration file whose name has the current node name on the end. If that is +not found, try the generic name. For really contorted configurations, that run +multiple Exims with different uid settings, first try adding the effective uid +before the node name. These complications are going to waste resources on most +systems. Therefore they are available only when requested by compile-time +options. */ + +void +readconf_main(BOOL nowarn) +{ +int sep = 0; +struct stat statbuf; +uschar *s, *filename; +const uschar *list = config_main_filelist; + +/* Loop through the possible file names */ + +while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))) + { + + /* Cut out all the fancy processing unless specifically wanted */ + + #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID) + uschar *suffix = filename + Ustrlen(filename); + + /* Try for the node-specific file if a node name exists */ + + #ifdef CONFIGURE_FILE_USE_NODE + struct utsname uts; + if (uname(&uts) >= 0) + { + #ifdef CONFIGURE_FILE_USE_EUID + sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename); + config_file = Ufopen(filename, "rb"); + if (config_file == NULL) + #endif /* CONFIGURE_FILE_USE_EUID */ + { + sprintf(CS suffix, ".%.256s", uts.nodename); + config_file = Ufopen(filename, "rb"); + } + } + #endif /* CONFIGURE_FILE_USE_NODE */ + + /* Otherwise, try the generic name, possibly with the euid added */ + + #ifdef CONFIGURE_FILE_USE_EUID + if (config_file == NULL) + { + sprintf(CS suffix, ".%ld", (long int)original_euid); + config_file = Ufopen(filename, "rb"); + } + #endif /* CONFIGURE_FILE_USE_EUID */ + + /* Finally, try the unadorned name */ + + if (config_file == NULL) + { + *suffix = 0; + config_file = Ufopen(filename, "rb"); + } + #else /* if neither defined */ + + /* This is the common case when the fancy processing is not included. */ + + config_file = Ufopen(filename, "rb"); + #endif + + /* If the file does not exist, continue to try any others. For any other + error, break out (and die). */ + + if (config_file != NULL || errno != ENOENT) break; + } + +/* On success, save the name for verification; config_filename is used when +logging configuration errors (it changes for .included files) whereas +config_main_filename is the name shown by -bP. Failure to open a configuration +file is a serious disaster. */ + +if (config_file) + { + uschar *last_slash = Ustrrchr(filename, '/'); + config_filename = config_main_filename = string_copy(filename); + + /* The config_main_directory we need for the $config_dir expansion. + config_main_filename we need for $config_file expansion. + And config_dir is the directory of the current configuration, used for + relative .includes. We do need to know it's name, as we change our working + directory later. */ + + if (filename[0] == '/') + config_main_directory = last_slash == filename ? US"/" : string_copyn(filename, last_slash - filename); + else + { + /* relative configuration file name: working dir + / + basename(filename) */ + + uschar buf[PATH_MAX]; + gstring * g; + + if (os_getcwd(buf, PATH_MAX) == NULL) + { + perror("exim: getcwd"); + exit(EXIT_FAILURE); + } + g = string_cat(NULL, buf); + + /* If the dir does not end with a "/", append one */ + if (g->s[g->ptr-1] != '/') + g = string_catn(g, US"/", 1); + + /* If the config file contains a "/", extract the directory part */ + if (last_slash) + g = string_catn(g, filename, last_slash - filename); + + config_main_directory = string_from_gstring(g); + } + config_directory = config_main_directory; + } +else + { + if (filename == NULL) + log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): " + "%s", config_main_filelist); + else + log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno, + "configuration file %s", filename)); + } + +/* Now, once we found and opened our configuration file, we change the directory +to a safe place. Later we change to $spool_directory. */ + +if (Uchdir("/") < 0) + { + perror("exim: chdir `/': "); + exit(EXIT_FAILURE); + } + +/* Check the status of the file we have opened, if we have retained root +privileges and the file isn't /dev/null (which *should* be 0666). */ + +if (f.trusted_config && Ustrcmp(filename, US"/dev/null")) + { + if (fstat(fileno(config_file), &statbuf) != 0) + log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s", + big_buffer); + + if ((statbuf.st_uid != root_uid /* owner not root */ + #ifdef CONFIGURE_OWNER + && statbuf.st_uid != config_uid /* owner not the special one */ + #endif + ) || /* or */ + (statbuf.st_gid != root_gid /* group not root & */ + #ifdef CONFIGURE_GROUP + && statbuf.st_gid != config_gid /* group not the special one */ + #endif + && (statbuf.st_mode & 020) != 0) || /* group writeable */ + /* or */ + ((statbuf.st_mode & 2) != 0)) /* world writeable */ + + log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the " + "wrong owner, group, or mode", big_buffer); + } + +/* Process the main configuration settings. They all begin with a lower case +letter. If we see something starting with an upper case letter, it is taken as +a macro definition. */ + +while ((s = get_config_line())) + { + if (config_lineno == 1 && Ustrstr(s, "\xef\xbb\xbf") == s) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "found unexpected BOM (Byte Order Mark)"); + + if (isupper(s[0])) + { if (!macro_read_assignment(s)) exim_exit(EXIT_FAILURE, US""); } + + else if (Ustrncmp(s, "domainlist", 10) == 0) + read_named_list(&domainlist_anchor, &domainlist_count, + MAX_NAMED_LIST, s+10, US"domain list"); + + else if (Ustrncmp(s, "hostlist", 8) == 0) + read_named_list(&hostlist_anchor, &hostlist_count, + MAX_NAMED_LIST, s+8, US"host list"); + + else if (Ustrncmp(s, US"addresslist", 11) == 0) + read_named_list(&addresslist_anchor, &addresslist_count, + MAX_NAMED_LIST, s+11, US"address list"); + + else if (Ustrncmp(s, US"localpartlist", 13) == 0) + read_named_list(&localpartlist_anchor, &localpartlist_count, + MAX_NAMED_LIST, s+13, US"local part list"); + + else + (void) readconf_handle_option(s, optionlist_config, optionlist_config_size, + NULL, US"main option \"%s\" unknown"); + } + + +/* If local_sender_retain is set, local_from_check must be unset. */ + +if (local_sender_retain && local_from_check) + log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and " + "local_sender_retain are set; this combination is not allowed"); + +/* If the timezone string is empty, set it to NULL, implying no TZ variable +wanted. */ + +if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL; + +/* The max retry interval must not be greater than 24 hours. */ + +if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60; + +/* remote_max_parallel must be > 0 */ + +if (remote_max_parallel <= 0) remote_max_parallel = 1; + +/* Save the configured setting of freeze_tell, so we can re-instate it at the +start of a new SMTP message. */ + +freeze_tell_config = freeze_tell; + +/* The primary host name may be required for expansion of spool_directory +and log_file_path, so make sure it is set asap. It is obtained from uname(), +but if that yields an unqualified value, make a FQDN by using gethostbyname to +canonize it. Some people like upper case letters in their host names, so we +don't force the case. */ + +if (primary_hostname == NULL) + { + const uschar *hostname; + struct utsname uts; + if (uname(&uts) < 0) + log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name"); + hostname = US uts.nodename; + + if (Ustrchr(hostname, '.') == NULL) + { + int af = AF_INET; + struct hostent *hostdata; + + #if HAVE_IPV6 + if (!disable_ipv6 && (dns_ipv4_lookup == NULL || + match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL, + MCL_DOMAIN, TRUE, NULL) != OK)) + af = AF_INET6; + #else + af = AF_INET; + #endif + + for (;;) + { + #if HAVE_IPV6 + #if HAVE_GETIPNODEBYNAME + int error_num; + hostdata = getipnodebyname(CS hostname, af, 0, &error_num); + #else + hostdata = gethostbyname2(CS hostname, af); + #endif + #else + hostdata = gethostbyname(CS hostname); + #endif + + if (hostdata != NULL) + { + hostname = US hostdata->h_name; + break; + } + + if (af == AF_INET) break; + af = AF_INET; + } + } + + primary_hostname = string_copy(hostname); + } + +/* Set up default value for smtp_active_hostname */ + +smtp_active_hostname = primary_hostname; + +/* If spool_directory wasn't set in the build-time configuration, it must have +got set above. Of course, writing to the log may not work if log_file_path is +not set, but it will at least get to syslog or somewhere, with any luck. */ + +if (*spool_directory == 0) + log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot " + "proceed"); + +/* Expand the spool directory name; it may, for example, contain the primary +host name. Same comment about failure. */ + +s = expand_string(spool_directory); +if (s == NULL) + log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory " + "\"%s\": %s", spool_directory, expand_string_message); +spool_directory = s; + +/* Expand log_file_path, which must contain "%s" in any component that isn't +the null string or "syslog". It is also allowed to contain one instance of %D +or %M. However, it must NOT contain % followed by anything else. */ + +if (*log_file_path != 0) + { + const uschar *ss, *sss; + int sep = ':'; /* Fixed for log file path */ + s = expand_string(log_file_path); + if (s == NULL) + log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path " + "\"%s\": %s", log_file_path, expand_string_message); + + ss = s; + while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL) + { + uschar *t; + if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue; + t = Ustrstr(sss, "%s"); + if (t == NULL) + log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not " + "contain \"%%s\"", sss); + *t = 'X'; + t = Ustrchr(sss, '%'); + if (t != NULL) + { + if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL) + log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains " + "unexpected \"%%\" character", s); + } + } + + log_file_path = s; + } + +/* Interpret syslog_facility into an integer argument for 'ident' param to +openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the +leading "log_". */ + +if (syslog_facility_str) + { + int i; + uschar *s = syslog_facility_str; + + if ((Ustrlen(syslog_facility_str) >= 4) && + (strncmpic(syslog_facility_str, US"log_", 4) == 0)) + s += 4; + + for (i = 0; i < syslog_list_size; i++) + if (strcmpic(s, syslog_list[i].name) == 0) + { + syslog_facility = syslog_list[i].value; + break; + } + + if (i >= syslog_list_size) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG, + "failed to interpret syslog_facility \"%s\"", syslog_facility_str); + } + +/* Expand pid_file_path */ + +if (*pid_file_path != 0) + { + if (!(s = expand_string(pid_file_path))) + log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path " + "\"%s\": %s", pid_file_path, expand_string_message); + pid_file_path = s; + } + +/* Set default value of process_log_path */ + +if (!process_log_path || *process_log_path =='\0') + process_log_path = string_sprintf("%s/exim-process.info", spool_directory); + +/* Compile the regex for matching a UUCP-style "From_" line in an incoming +message. */ + +regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE); + +/* Unpick the SMTP rate limiting options, if set */ + +if (smtp_ratelimit_mail) + unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold, + &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit); + +if (smtp_ratelimit_rcpt) + unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold, + &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit); + +/* The qualify domains default to the primary host name */ + +if (!qualify_domain_sender) + qualify_domain_sender = primary_hostname; +if (!qualify_domain_recipient) + qualify_domain_recipient = qualify_domain_sender; + +/* Setting system_filter_user in the configuration sets the gid as well if a +name is given, but a numerical value does not. */ + +if (system_filter_uid_set && !system_filter_gid_set) + { + struct passwd *pw = getpwuid(system_filter_uid); + if (!pw) + log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld", + (long int)system_filter_uid); + system_filter_gid = pw->pw_gid; + system_filter_gid_set = TRUE; + } + +/* If the errors_reply_to field is set, check that it is syntactically valid +and ensure it contains a domain. */ + +if (errors_reply_to) + { + uschar *errmess; + int start, end, domain; + uschar *recipient = parse_extract_address(errors_reply_to, &errmess, + &start, &end, &domain, FALSE); + + if (!recipient) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG, + "error in errors_reply_to (%s): %s", errors_reply_to, errmess); + + if (domain == 0) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG, + "errors_reply_to (%s) does not contain a domain", errors_reply_to); + } + +/* If smtp_accept_queue or smtp_accept_max_per_host is set, then +smtp_accept_max must also be set. */ + +if (smtp_accept_max == 0 && + (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL)) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG, + "smtp_accept_max must be set if smtp_accept_queue or " + "smtp_accept_max_per_host is set"); + +/* Set up the host number if anything is specified. It is an expanded string +so that it can be computed from the host name, for example. We do this last +so as to ensure that everything else is set up before the expansion. */ + +if (host_number_string) + { + long int n; + uschar *end; + uschar *s = expand_string(host_number_string); + + if (!s) + log_write(0, LOG_MAIN|LOG_PANIC_DIE, + "failed to expand localhost_number \"%s\": %s", + host_number_string, expand_string_message); + n = Ustrtol(s, &end, 0); + while (isspace(*end)) end++; + if (*end != 0) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG, + "localhost_number value is not a number: %s", s); + if (n > LOCALHOST_MAX) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG, + "localhost_number is greater than the maximum allowed value (%d)", + LOCALHOST_MAX); + host_number = n; + } + +#ifdef SUPPORT_TLS +/* If tls_verify_hosts is set, tls_verify_certificates must also be set */ + +if ((tls_verify_hosts || tls_try_verify_hosts) && !tls_verify_certificates) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG, + "tls_%sverify_hosts is set, but tls_verify_certificates is not set", + tls_verify_hosts ? "" : "try_"); + +/* This also checks that the library linkage is working and we can call +routines in it, so call even if tls_require_ciphers is unset */ +if (!tls_dropprivs_validate_require_cipher(nowarn)) + exit(1); + +/* Magic number: at time of writing, 1024 has been the long-standing value +used by so many clients, and what Exim used to use always, that it makes +sense to just min-clamp this max-clamp at that. */ +if (tls_dh_max_bits < 1024) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG, + "tls_dh_max_bits is too small, must be at least 1024 for interop"); + +/* If openssl_options is set, validate it */ +if (openssl_options) + { +# ifdef USE_GNUTLS + log_write(0, LOG_PANIC_DIE|LOG_CONFIG, + "openssl_options is set but we're using GnuTLS"); +# else + long dummy; + if (!tls_openssl_options_parse(openssl_options, &dummy)) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG, + "openssl_options parse error: %s", openssl_options); +# endif + } +#endif /*SUPPORT_TLS*/ + +if (!nowarn && !keep_environment && environ && *environ) + log_write(0, LOG_MAIN, + "Warning: purging the environment.\n" + " Suggested action: use keep_environment."); +} + + + +/************************************************* +* Initialize one driver * +*************************************************/ + +/* This is called once the driver's generic options, if any, have been read. +We can now find the driver, set up defaults for the private options, and +unset any "set" bits in the private options table (which might have been +set by another incarnation of the same driver). + +Arguments: + d pointer to driver instance block, with generic + options filled in + drivers_available vector of available drivers + size_of_info size of each block in drivers_available + class class of driver, for error message + +Returns: pointer to the driver info block +*/ + +static driver_info * +init_driver(driver_instance *d, driver_info *drivers_available, + int size_of_info, uschar *class) +{ +driver_info *dd; + +for (dd = drivers_available; dd->driver_name[0] != 0; + dd = (driver_info *)((US dd) + size_of_info)) + { + if (Ustrcmp(d->driver_name, dd->driver_name) == 0) + { + int i; + int len = dd->options_len; + d->info = dd; + d->options_block = store_get(len); + memcpy(d->options_block, dd->options_block, len); + for (i = 0; i < *(dd->options_count); i++) + dd->options[i].type &= ~opt_set; + return dd; + } + } + +log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name); + +return NULL; /* never obeyed */ +} + + + + +/************************************************* +* Initialize driver list * +*************************************************/ + +/* This function is called for routers, transports, and authentication +mechanisms. It reads the data from the current point in the configuration file +up to the end of the section, and sets up a chain of instance blocks according +to the file's contents. The file will already have been opened by a call to +readconf_main, and must be left open for subsequent reading of further data. + +Any errors cause a panic crash. Note that the blocks with names driver_info and +driver_instance must map the first portions of all the _info and _instance +blocks for this shared code to work. + +Arguments: + class "router", "transport", or "authenticator" + anchor &routers, &transports, &auths + drivers_available available drivers + size_of_info size of each info block + instance_default points to default data for an instance + instance_size size of instance block + driver_optionlist generic option list + driver_optionlist_count count of generic option list + +Returns: nothing +*/ + +void +readconf_driver_init( + uschar *class, + driver_instance **anchor, + driver_info *drivers_available, + int size_of_info, + void *instance_default, + int instance_size, + optionlist *driver_optionlist, + int driver_optionlist_count) +{ +driver_instance **p = anchor; +driver_instance *d = NULL; +uschar *buffer; + +while ((buffer = get_config_line()) != NULL) + { + uschar name[64]; + uschar *s; + + /* Read the first name on the line and test for the start of a new driver. A + macro definition indicates the end of the previous driver. If this isn't the + start of a new driver, the line will be re-read. */ + + s = readconf_readname(name, sizeof(name), buffer); + + /* Handle macro definition, first finishing off the initialization of the + previous driver, if any. */ + + if (isupper(*name) && *s == '=') + { + if (d) + { + if (!d->driver_name) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG, + "no driver defined for %s \"%s\"", class, d->name); + (d->info->init)(d); + d = NULL; + } + if (!macro_read_assignment(buffer)) exim_exit(EXIT_FAILURE, US""); + continue; + } + + /* If the line starts with a name terminated by a colon, we are at the + start of the definition of a new driver. The rest of the line must be + blank. */ + + if (*s++ == ':') + { + int i; + + /* Finish off initializing the previous driver. */ + + if (d) + { + if (!d->driver_name) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG, + "no driver defined for %s \"%s\"", class, d->name); + (d->info->init)(d); + } + + /* Check that we haven't already got a driver of this name */ + + for (d = *anchor; d; d = d->next) + if (Ustrcmp(name, d->name) == 0) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG, + "there are two %ss called \"%s\"", class, name); + + /* Set up a new driver instance data block on the chain, with + its default values installed. */ + + d = store_get(instance_size); + memcpy(d, instance_default, instance_size); + *p = d; + p = &d->next; + d->name = string_copy(name); + + /* Clear out the "set" bits in the generic options */ + + for (i = 0; i < driver_optionlist_count; i++) + driver_optionlist[i].type &= ~opt_set; + + /* Check nothing more on this line, then do the next loop iteration. */ + + while (isspace(*s)) s++; + if (*s != 0) extra_chars_error(s, US"driver name ", name, US""); + continue; + } + + /* Not the start of a new driver. Give an error if we have not set up a + current driver yet. */ + + if (!d) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s name missing", class); + + /* First look to see if this is a generic option; if it is "driver", + initialize the driver. If is it not a generic option, we can look for a + private option provided that the driver has been previously set up. */ + + if (readconf_handle_option(buffer, driver_optionlist, + driver_optionlist_count, d, NULL)) + { + if (!d->info && d->driver_name) + init_driver(d, drivers_available, size_of_info, class); + } + + /* Handle private options - pass the generic block because some may + live therein. A flag with each option indicates if it is in the public + block. */ + + else if (d->info) + readconf_handle_option(buffer, d->info->options, + *(d->info->options_count), d, US"option \"%s\" unknown"); + + /* The option is not generic and the driver name has not yet been given. */ + + else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown " + "(\"driver\" must be specified before any private options)", name); + } + +/* Run the initialization function for the final driver. */ + +if (d) + { + if (!d->driver_name) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG, + "no driver defined for %s \"%s\"", class, d->name); + (d->info->init)(d); + } +} + + + +/************************************************* +* Check driver dependency * +*************************************************/ + +/* This function is passed a driver instance and a string. It checks whether +any of the string options for the driver contains the given string as an +expansion variable. + +Arguments: + d points to a driver instance block + s the string to search for + +Returns: TRUE if a dependency is found +*/ + +BOOL +readconf_depends(driver_instance *d, uschar *s) +{ +int count = *(d->info->options_count); +optionlist *ol; +uschar *ss; + +for (ol = d->info->options; ol < d->info->options + count; ol++) + { + void *options_block; + uschar *value; + int type = ol->type & opt_mask; + if (type != opt_stringptr) continue; + options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d; + value = *(uschar **)(US options_block + (long int)(ol->value)); + if (value != NULL && (ss = Ustrstr(value, s)) != NULL) + { + if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') || + isalnum(ss[Ustrlen(s)])) continue; + DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n", + d->name, ol->name, s); + return TRUE; + } + } + +DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s); +return FALSE; +} + + + + +/************************************************* +* Decode an error type for retries * +*************************************************/ + +/* This function is global because it is also called from the main +program when testing retry information. It decodes strings such as "quota_7d" +into numerical error codes. + +Arguments: + pp points to start of text + p points past end of text + basic_errno points to an int to receive the main error number + more_errno points to an int to receive the secondary error data + +Returns: NULL if decoded correctly; else points to error text +*/ + +uschar * +readconf_retry_error(const uschar *pp, const uschar *p, + int *basic_errno, int *more_errno) +{ +int len; +const uschar *q = pp; +while (q < p && *q != '_') q++; +len = q - pp; + +if (len == 5 && strncmpic(pp, US"quota", len) == 0) + { + *basic_errno = ERRNO_EXIMQUOTA; + if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0) + return US"bad time value"; + } + +else if (len == 7 && strncmpic(pp, US"refused", len) == 0) + { + *basic_errno = ECONNREFUSED; + if (q != p) + { + if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M'; + else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A'; + else return US"A or MX expected after \"refused\""; + } + } + +else if (len == 7 && strncmpic(pp, US"timeout", len) == 0) + { + *basic_errno = ETIMEDOUT; + if (q != p) + { + int i; + int xlen = p - q - 1; + const uschar *x = q + 1; + + static uschar *extras[] = + { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" }; + static int values[] = + { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' }; + + for (i = 0; i < nelem(extras); i++) + if (strncmpic(x, extras[i], xlen) == 0) + { + *more_errno = values[i]; + break; + } + + if (i >= nelem(extras)) + if (strncmpic(x, US"DNS", xlen) == 0) + log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer " + "available in retry rules (it has never worked) - treated as " + "\"timeout\""); + else + return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\""; + } + } + +else if (strncmpic(pp, US"mail_4", 6) == 0 || + strncmpic(pp, US"rcpt_4", 6) == 0 || + strncmpic(pp, US"data_4", 6) == 0) + { + BOOL bad = FALSE; + int x = 255; /* means "any 4xx code" */ + if (p != pp + 8) bad = TRUE; else + { + int a = pp[6], b = pp[7]; + if (isdigit(a)) + { + x = (a - '0') * 10; + if (isdigit(b)) x += b - '0'; + else if (b == 'x') x += 100; + else bad = TRUE; + } + else if (a != 'x' || b != 'x') bad = TRUE; + } + + if (bad) + return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where " + "x is literal and d is any digit", pp); + + *basic_errno = *pp == 'm' ? ERRNO_MAIL4XX : + *pp == 'r' ? ERRNO_RCPT4XX : ERRNO_DATA4XX; + *more_errno = x << 8; + } + +else if (len == 4 && strncmpic(pp, US"auth", len) == 0 && + strncmpic(q+1, US"failed", p-q-1) == 0) + *basic_errno = ERRNO_AUTHFAIL; + +else if (strncmpic(pp, US"lost_connection", p - pp) == 0) + *basic_errno = ERRNO_SMTPCLOSED; + +else if (strncmpic(pp, US"tls_required", p - pp) == 0) + *basic_errno = ERRNO_TLSREQUIRED; + +else if (strncmpic(pp, US"lookup", p - pp) == 0) + *basic_errno = ERRNO_UNKNOWNHOST; + +else if (len != 1 || Ustrncmp(pp, "*", 1) != 0) + return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp); + +return NULL; +} + + + + +/************************************************* +* Read retry information * +*************************************************/ + +/* Each line of retry information contains: + +. A domain name pattern or an address pattern; + +. An error name, possibly with additional data, or *; + +. An optional sequence of retry items, each consisting of an identifying + letter, a cutoff time, and optional parameters. + +All this is decoded and placed into a control block. */ + + +/* Subroutine to read an argument, preceded by a comma and terminated +by comma, semicolon, whitespace, or newline. The types are: 0 = time value, +1 = fixed point number (returned *1000). + +Arguments: + paddr pointer to pointer to current character; updated + type 0 => read a time; 1 => read a fixed point number + +Returns: time in seconds or fixed point number * 1000 +*/ + +static int +retry_arg(const uschar **paddr, int type) +{ +const uschar *p = *paddr; +const uschar *pp; + +if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected"); + +while (isspace(*p)) p++; +pp = p; +while (isalnum(*p) || (type == 1 && *p == '.')) p++; + +if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';') + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected"); + +*paddr = p; +switch (type) + { + case 0: return readconf_readtime(pp, *p, FALSE); + case 1: return readconf_readfixed(pp, *p); + } +return 0; /* Keep picky compilers happy */ +} + +/* The function proper */ + +void +readconf_retries(void) +{ +retry_config **chain = &retries; +retry_config *next; +const uschar *p; + +while ((p = get_config_line())) + { + retry_rule **rchain; + const uschar *pp; + uschar *error; + + next = store_get(sizeof(retry_config)); + next->next = NULL; + *chain = next; + chain = &(next->next); + next->basic_errno = next->more_errno = 0; + next->senders = NULL; + next->rules = NULL; + rchain = &(next->rules); + + next->pattern = string_dequote(&p); + while (isspace(*p)) p++; + pp = p; + while (mac_isgraph(*p)) p++; + if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "missing error type in retry rule"); + + /* Test error names for things we understand. */ + + if ((error = readconf_retry_error(pp, p, &next->basic_errno, + &next->more_errno))) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error); + + /* There may be an optional address list of senders to be used as another + constraint on the rule. This was added later, so the syntax is a bit of a + fudge. Anything that is not a retry rule starting "F," or "G," is treated as + an address list. */ + + while (isspace(*p)) p++; + if (Ustrncmp(p, "senders", 7) == 0) + { + p += 7; + while (isspace(*p)) p++; + if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "\"=\" expected after \"senders\" in retry rule"); + while (isspace(*p)) p++; + next->senders = string_dequote(&p); + } + + /* Now the retry rules. Keep the maximum timeout encountered. */ + + while (isspace(*p)) p++; + + while (*p != 0) + { + retry_rule *rule = store_get(sizeof(retry_rule)); + *rchain = rule; + rchain = &(rule->next); + rule->next = NULL; + rule->rule = toupper(*p++); + rule->timeout = retry_arg(&p, 0); + if (rule->timeout > retry_maximum_timeout) + retry_maximum_timeout = rule->timeout; + + switch (rule->rule) + { + case 'F': /* Fixed interval */ + rule->p1 = retry_arg(&p, 0); + break; + + case 'G': /* Geometrically increasing intervals */ + case 'H': /* Ditto, but with randomness */ + rule->p1 = retry_arg(&p, 0); + rule->p2 = retry_arg(&p, 1); + break; + + default: + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter"); + break; + } + + if (rule->timeout <= 0 || rule->p1 <= 0 || + (rule->rule != 'F' && rule->p2 < 1000)) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "bad parameters for retry rule"); + + while (isspace(*p)) p++; + if (*p == ';') + { + p++; + while (isspace(*p)) p++; + } + else if (*p != 0) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected"); + } + } +} + + + +/************************************************* +* Initialize authenticators * +*************************************************/ + +/* Read the authenticators section of the configuration file. + +Arguments: none +Returns: nothing +*/ + +static void +auths_init(void) +{ +auth_instance *au, *bu; +#ifdef EXPERIMENTAL_PIPE_CONNECT +int nauths = 0; +#endif + +readconf_driver_init(US"authenticator", + (driver_instance **)(&auths), /* chain anchor */ + (driver_info *)auths_available, /* available drivers */ + sizeof(auth_info), /* size of info block */ + &auth_defaults, /* default values for generic options */ + sizeof(auth_instance), /* size of instance block */ + optionlist_auths, /* generic options */ + optionlist_auths_size); + +for (au = auths; au; au = au->next) + { + if (!au->public_name) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for " + "the %s authenticator", au->name); + + for (bu = au->next; bu; bu = bu->next) + if (strcmpic(au->public_name, bu->public_name) == 0) + if ((au->client && bu->client) || (au->server && bu->server)) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators " + "(%s and %s) have the same public name (%s)", + au->client ? US"client" : US"server", au->name, bu->name, + au->public_name); +#ifdef EXPERIMENTAL_PIPE_CONNECT + nauths++; +#endif + } +#ifdef EXPERIMENTAL_PIPE_CONNECT +f.smtp_in_early_pipe_no_auth = nauths > 16; +#endif +} + + + + +/************************************************* +* Read ACL information * +*************************************************/ + +/* If this run of Exim is not doing something that involves receiving a +message, we can just skip over the ACL information. No need to parse it. + +First, we have a function for acl_read() to call back to get the next line. We +need to remember the line we passed, because at the end it will contain the +name of the next ACL. */ + +static uschar *acl_line; + +static uschar * +acl_callback(void) +{ +acl_line = get_config_line(); +return acl_line; +} + + +/* Now the main function: + +Arguments: none +Returns: nothing +*/ + +static void +readconf_acl(void) +{ +uschar *p; + +/* Read each ACL and add it into the tree. Macro (re)definitions are allowed +between ACLs. */ + +acl_line = get_config_line(); + +while(acl_line) + { + uschar name[64]; + tree_node *node; + uschar *error; + + p = readconf_readname(name, sizeof(name), acl_line); + if (isupper(*name) && *p == '=') + { + if (!macro_read_assignment(acl_line)) exim_exit(EXIT_FAILURE, US""); + acl_line = get_config_line(); + continue; + } + + if (*p != ':' || name[0] == 0) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name"); + + node = store_get(sizeof(tree_node) + Ustrlen(name)); + Ustrcpy(node->name, name); + if (!tree_insertnode(&acl_anchor, node)) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "there are two ACLs called \"%s\"", name); + + node->data.ptr = acl_read(acl_callback, &error); + + if (node->data.ptr == NULL && error != NULL) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error); + } +} + + + +/************************************************* +* Read configuration for local_scan() * +*************************************************/ + +/* This function is called after "begin local_scan" is encountered in the +configuration file. If the local_scan() function allows for configuration +options, we can process them. Otherwise, we expire in a panic. + +Arguments: none +Returns: nothing +*/ + +static void +local_scan_init(void) +{ +#ifndef LOCAL_SCAN_HAS_OPTIONS +log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: " + "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)"); +#else + +uschar *p; +while ((p = get_config_line())) + { + (void) readconf_handle_option(p, local_scan_options, local_scan_options_count, + NULL, US"local_scan option \"%s\" unknown"); + } +#endif +} + + + +/************************************************* +* Read rest of configuration (after main) * +*************************************************/ + +/* This function reads the rest of the runtime configuration, after the main +configuration. It is called only when actually needed. Each subsequent section +of the configuration starts with a line of the form + + begin name + +where the name is "routers", "transports", etc. A section is terminated by +hitting the next "begin" line, and the next name is left in next_section. +Because it may confuse people as to whether the names are singular or plural, +we add "s" if it's missing. There is always enough room in next_section for +this. This function is basically just a switch. + +Arguments: none +Returns: nothing +*/ + +static uschar *section_list[] = { + US"acls", + US"authenticators", + US"local_scans", + US"retrys", + US"rewrites", + US"routers", + US"transports"}; + +void +readconf_rest(void) +{ +int had = 0; + +while(next_section[0] != 0) + { + int bit; + int first = 0; + int last = nelem(section_list); + int mid = last/2; + int n = Ustrlen(next_section); + + if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s"); + + for (;;) + { + int c = strcmpic(next_section, section_list[mid]); + if (c == 0) break; + if (c > 0) first = mid + 1; else last = mid; + if (first >= last) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "\"%.*s\" is not a known configuration section name", n, next_section); + mid = (last + first)/2; + } + + bit = 1 << mid; + if (((had ^= bit) & bit) == 0) + log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, + "\"%.*s\" section is repeated in the configuration file", n, + next_section); + + switch(mid) + { + case 0: readconf_acl(); break; + case 1: auths_init(); break; + case 2: local_scan_init(); break; + case 3: readconf_retries(); break; + case 4: readconf_rewrites(); break; + case 5: route_init(); break; + case 6: transport_init(); break; + } + } + +(void)fclose(config_file); +} + +/* Init the storage for the pre-parsed config lines */ +void +readconf_save_config(const uschar *s) +{ +save_config_line(string_sprintf("# Exim Configuration (%s)", + f.running_in_test_harness ? US"X" : s)); +} + +static void +save_config_position(const uschar *file, int line) +{ +save_config_line(string_sprintf("# %d \"%s\"", line, file)); +} + +/* Append a pre-parsed logical line to the config lines store, +this operates on a global (static) list that holds all the pre-parsed +config lines, we do no further processing here, output formatting and +honouring of <hide> or macros will be done during output */ + +static void +save_config_line(const uschar* line) +{ +static config_line_item *current; +config_line_item *next; + +next = (config_line_item*) store_get(sizeof(config_line_item)); +next->line = string_copy(line); +next->next = NULL; + +if (!config_lines) config_lines = next; +else current->next = next; + +current = next; +} + +/* List the parsed config lines, care about nice formatting and +hide the <hide> values unless we're the admin user */ +void +print_config(BOOL admin, BOOL terse) +{ +config_line_item *i; +const int TS = terse ? 0 : 2; +int indent = 0; + +for (i = config_lines; i; i = i->next) + { + uschar *current; + uschar *p; + + /* skip over to the first non-space */ + for (current = i->line; *current && isspace(*current); ++current) + ; + + if (*current == '\0') + continue; + + /* Collapse runs of spaces. We stop this if we encounter one of the + * following characters: "'$, as this may indicate careful formatting */ + for (p = current; *p; ++p) + { + uschar *next; + if (!isspace(*p)) continue; + if (*p != ' ') *p = ' '; + + for (next = p; isspace(*next); ++next) + ; + + if (next - p > 1) + memmove(p+1, next, Ustrlen(next)+1); + + if (*next == '"' || *next == '\'' || *next == '$') + break; + } + + /* # lines */ + if (current[0] == '#') + puts(CCS current); + + /* begin lines are left aligned */ + else if (Ustrncmp(current, "begin", 5) == 0 && isspace(current[5])) + { + if (!terse) puts(""); + puts(CCS current); + indent = TS; + } + + /* router/acl/transport block names */ + else if (current[Ustrlen(current)-1] == ':' && !Ustrchr(current, '=')) + { + if (!terse) puts(""); + printf("%*s%s\n", TS, "", current); + indent = 2 * TS; + } + + /* hidden lines (all MACROS or lines prefixed with "hide") */ + else if ( !admin + && ( isupper(*current) + || Ustrncmp(current, "hide", 4) == 0 && isspace(current[4]) + ) + ) + { + if ((p = Ustrchr(current, '='))) + { + *p = '\0'; + printf("%*s%s= %s\n", indent, "", current, hidden); + } + /* e.g.: hide split_spool_directory */ + else + printf("%*s\n", indent, hidden); + } + + else + /* rest is public */ + printf("%*s%s\n", indent, "", current); + } +} + +#endif /*!MACRO_PREDEF*/ +/* vi: aw ai sw=2 +*/ +/* End of readconf.c */ |