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/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
/* Copyright (c) University of Cambridge 1995 - 2018 */
/* Copyright (c) The Exim Maintainers 2020 */
/* See the file NOTICE for conditions of use and distribution. */
#define DELIVER_BUFFER_SIZE 4096
#define PENDING 256
#define PENDING_DEFER (PENDING + DEFER)
#define PENDING_OK (PENDING + OK)
/* Private structure for the private options and other private data. */
typedef struct {
uschar *hosts;
uschar *fallback_hosts;
host_item *hostlist;
host_item *fallback_hostlist;
uschar *authenticated_sender;
uschar *helo_data;
uschar *interface;
uschar *port;
uschar *protocol;
uschar *dscp;
uschar *serialize_hosts;
uschar *hosts_try_auth;
uschar *hosts_require_auth;
uschar *hosts_try_chunking;
#ifdef SUPPORT_DANE
uschar *hosts_try_dane;
uschar *hosts_require_dane;
uschar *dane_require_tls_ciphers;
#endif
uschar *hosts_try_fastopen;
#ifndef DISABLE_PRDR
uschar *hosts_try_prdr;
#endif
#ifndef DISABLE_OCSP
uschar *hosts_request_ocsp;
uschar *hosts_require_ocsp;
#endif
uschar *hosts_require_tls;
uschar *hosts_avoid_tls;
uschar *hosts_verify_avoid_tls;
uschar *hosts_avoid_pipelining;
#ifndef DISABLE_PIPE_CONNECT
uschar *hosts_pipe_connect;
#endif
uschar *hosts_avoid_esmtp;
#ifndef DISABLE_TLS
uschar *hosts_nopass_tls;
uschar *hosts_noproxy_tls;
#endif
int command_timeout;
int connect_timeout;
int data_timeout;
int final_timeout;
int size_addition;
int hosts_max_try;
int hosts_max_try_hardlimit;
BOOL address_retry_include_sender;
BOOL allow_localhost;
BOOL authenticated_sender_force;
BOOL gethostbyname;
BOOL dns_qualify_single;
BOOL dns_search_parents;
dnssec_domains dnssec;
BOOL delay_after_cutoff;
BOOL hosts_override;
BOOL hosts_randomize;
BOOL keepalive;
BOOL lmtp_ignore_quota;
uschar *expand_retry_include_ip_address;
BOOL retry_include_ip_address;
#ifdef SUPPORT_SOCKS
uschar *socks_proxy;
#endif
#ifndef DISABLE_TLS
uschar *tls_certificate;
uschar *tls_crl;
uschar *tls_privatekey;
uschar *tls_require_ciphers;
# ifdef EXPERIMENTAL_TLS_RESUME
uschar *tls_resumption_hosts;
# endif
const uschar *tls_sni;
uschar *tls_verify_certificates;
int tls_dh_min_bits;
BOOL tls_tempfail_tryclear;
uschar *tls_verify_hosts;
uschar *tls_try_verify_hosts;
uschar *tls_verify_cert_hostnames;
#endif
#ifdef SUPPORT_I18N
uschar *utf8_downconvert;
#endif
#ifndef DISABLE_DKIM
struct ob_dkim dkim;
#endif
#ifdef EXPERIMENTAL_ARC
uschar *arc_sign;
#endif
} smtp_transport_options_block;
#define SOB (smtp_transport_options_block *)
/* smtp connect context */
typedef struct {
uschar * from_addr;
address_item * addrlist;
smtp_connect_args conn_args;
int port;
BOOL verify:1;
BOOL lmtp:1;
BOOL smtps:1;
BOOL ok:1;
BOOL setting_up:1;
#ifndef DISABLE_PIPE_CONNECT
BOOL early_pipe_ok:1;
BOOL early_pipe_active:1;
#endif
BOOL esmtp:1;
BOOL esmtp_sent:1;
BOOL pipelining_used:1;
#ifndef DISABLE_PRDR
BOOL prdr_active:1;
#endif
#ifdef SUPPORT_I18N
BOOL utf8_needed:1;
#endif
BOOL dsn_all_lasthop:1;
#if !defined(DISABLE_TLS) && defined(SUPPORT_DANE)
BOOL dane_required:1;
#endif
#ifndef DISABLE_PIPE_CONNECT
BOOL pending_BANNER:1;
BOOL pending_EHLO:1;
#endif
BOOL pending_MAIL:1;
BOOL pending_BDAT:1;
BOOL RCPT_452:1;
BOOL good_RCPT:1;
BOOL completed_addr:1;
BOOL send_rset:1;
BOOL send_quit:1;
int max_rcpt;
int cmd_count;
unsigned peer_offered;
unsigned avoid_option;
uschar * igquotstr;
uschar * helo_data;
#ifdef EXPERIMENTAL_DSN_INFO
uschar * smtp_greeting;
uschar * helo_response;
#endif
#ifndef DISABLE_PIPE_CONNECT
ehlo_resp_precis ehlo_resp;
#endif
struct timeval delivery_start;
address_item * first_addr;
address_item * next_addr;
address_item * sync_addr;
client_conn_ctx cctx;
smtp_inblock inblock;
smtp_outblock outblock;
uschar buffer[DELIVER_BUFFER_SIZE];
uschar inbuffer[4096];
uschar outbuffer[4096];
} smtp_context;
extern int smtp_setup_conn(smtp_context *, BOOL);
extern int smtp_write_mail_and_rcpt_cmds(smtp_context *, int *);
extern int smtp_reap_early_pipe(smtp_context *, int *);
/* Data for reading the private options. */
extern optionlist smtp_transport_options[];
extern int smtp_transport_options_count;
/* Block containing default values. */
extern smtp_transport_options_block smtp_transport_option_defaults;
/* The main, init, and closedown entry points for the transport */
extern BOOL smtp_transport_entry(transport_instance *, address_item *);
extern void smtp_transport_init(transport_instance *);
extern void smtp_transport_closedown(transport_instance *);
#ifdef SUPPORT_SOCKS
extern int socks_sock_connect(host_item *, int, int, uschar *,
transport_instance *, int);
#endif
/* End of transports/smtp.h */
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