* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) University of Cambridge 1995 - 2012 */
+/* Copyright (c) The Exim Maintainers 2020 - 2022 */
+/* Copyright (c) University of Cambridge 1995 - 2018 */
/* See the file NOTICE for conditions of use and distribution. */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#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 *serialize_hosts;
- uschar *hosts_try_auth;
- uschar *hosts_require_auth;
- uschar *hosts_require_tls;
- uschar *hosts_avoid_tls;
- uschar *hosts_avoid_pipelining;
- uschar *hosts_avoid_esmtp;
- uschar *hosts_nopass_tls;
- 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;
- BOOL delay_after_cutoff;
- BOOL hosts_override;
- BOOL hosts_randomize;
- BOOL keepalive;
- BOOL lmtp_ignore_quota;
- BOOL retry_include_ip_address;
- #ifdef SUPPORT_TLS
- uschar *tls_certificate;
- uschar *tls_crl;
- uschar *tls_privatekey;
- uschar *tls_require_ciphers;
- uschar *gnutls_require_kx;
- uschar *gnutls_require_mac;
- uschar *gnutls_require_proto;
- uschar *tls_sni;
- uschar *tls_verify_certificates;
- int tls_dh_min_bits;
- BOOL tls_tempfail_tryclear;
- #endif
- #ifndef DISABLE_DKIM
- uschar *dkim_domain;
- uschar *dkim_private_key;
- uschar *dkim_selector;
- uschar *dkim_canon;
- uschar *dkim_sign_headers;
- uschar *dkim_strict;
- #endif
+ 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 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 */
git://git.exim.org / exim.git / blobdiff