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/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
/* Copyright (c) The Exim Maintainers 2020 - 2022 */
/* Copyright (c) University of Cambridge 1995 - 2018 */
/* 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)
#ifndef DISABLE_TLS
/* Flags structure for validity of TLS configuration */
typedef struct {
BOOL conn_certs:1; /* certificates etc. loaded */
BOOL cabundle:1; /* CA certificates loaded */
BOOL crl:1; /* CRL loaded */
BOOL pri_string:1; /* cipher priority-string cache loaded */
BOOL dh:1; /* Diffie-Helman params loaded */
BOOL ecdh:1; /* EC Diffie-Helman params loaded */
BOOL ca_rdn_emulate:1; /* do not advertise usable-cert list */
BOOL ocsp_hook:1; /* need hshake callback on session */
void * libdata0; /* library-dependent preloaded data */
void * libdata1; /* library-dependent preloaded data */
} exim_tlslib_state;
#endif
/* 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_alpn;
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;
int message_linelength_limit;
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_alpn;
uschar *tls_certificate;
uschar *tls_crl;
uschar *tls_privatekey;
uschar *tls_require_ciphers;
# ifndef DISABLE_TLS_RESUME
uschar *host_name_extract;
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
#ifndef DISABLE_TLS
exim_tlslib_state tls_preload;
#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;
#ifdef EXPERIMENTAL_ESMTP_LIMITS
BOOL single_rcpt_domain:1;
#endif
BOOL completed_addr:1;
BOOL send_rset:1;
BOOL send_quit:1;
BOOL send_tlsclose:1;
unsigned peer_offered;
#ifdef EXPERIMENTAL_ESMTP_LIMITS
unsigned peer_limit_mail;
unsigned peer_limit_rcpt;
unsigned peer_limit_rcptdom;
#endif
unsigned max_mail;
int max_rcpt;
int cmd_count;
unsigned avoid_option;
uschar * igquotstr;
uschar * helo_data;
#ifdef EXPERIMENTAL_DSN_INFO
uschar * smtp_greeting;
uschar * helo_response;
#endif
#ifndef DISABLE_PIPE_CONNECT
/* Info about the EHLO response stored to / retrieved from cache. When
operating early-pipe, we use the cached values. For each of plaintext and
crypted we store bitmaps for ESMTP features and AUTH methods. If the LIMITS
extension is built and usable them at least one of the limits values cached
is nonzero, and we use the values to constrain the connection. */
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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