* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) University of Cambridge 1995 - 2014 */
+/* Copyright (c) University of Cambridge 1995 - 2018 */
+/* Copyright (c) The Exim Maintainers 2020 - 2021 */
/* See the file NOTICE for conditions of use and distribution. */
struct transport_info;
struct router_info;
+/* Growable-string */
+typedef struct gstring {
+ int size; /* Current capacity of string memory */
+ int ptr; /* Offset at which to append further chars */
+ uschar * s; /* The string memory */
+} gstring;
+
/* Structure for remembering macros for the configuration file */
typedef struct macro_item {
- struct macro_item *next;
- BOOL command_line;
- uschar *replacement;
- uschar name[1];
+ struct macro_item * next;
+ BOOL command_line;
+ unsigned namelen;
+ unsigned replen;
+ const uschar * name;
+ const uschar * replacement;
} macro_item;
/* Structure for bit tables for debugging and logging */
typedef struct bit_table {
uschar *name;
- unsigned int bit;
+ int bit;
} bit_table;
/* Block for holding a uid and gid, possibly unset, and an initgroups flag. */
BOOL initgroups;
} ugid_block;
+typedef enum { CHUNKING_NOT_OFFERED = -1,
+ CHUNKING_OFFERED,
+ CHUNKING_ACTIVE,
+ CHUNKING_LAST} chunking_state_t;
+
+typedef enum { TFO_NOT_USED = 0,
+ TFO_ATTEMPTED_NODATA,
+ TFO_ATTEMPTED_DATA,
+ TFO_USED_NODATA,
+ TFO_USED_DATA } tfo_state_t;
+
/* Structure for holding information about a host for use mainly by routers,
but also used when checking lists of hosts and when transporting. Looking up
host addresses is done using this structure. */
typedef struct host_item {
struct host_item *next;
- uschar *name; /* Host name */
- uschar *address; /* IP address in text form */
- int port; /* port value in host order (if SRV lookup) */
- int mx; /* MX value if found via MX records */
- int sort_key; /* MX*1000 plus random "fraction" */
- int status; /* Usable, unusable, or unknown */
- int why; /* Why host is unusable */
- int last_try; /* Time of last try if known */
+ const uschar *name; /* Host name */
+#ifndef DISABLE_TLS
+ const uschar *certname; /* Name used for certificate checks */
+#endif
+ const uschar *address; /* IP address in text form */
+ int port; /* port value in host order (if SRV lookup) */
+ int mx; /* MX value if found via MX records */
+ int sort_key; /* MX*1000 plus random "fraction" */
+ int status; /* Usable, unusable, or unknown */
+ int why; /* Why host is unusable */
+ int last_try; /* Time of last try if known */
dnssec_status_t dnssec;
} host_item;
uschar *name; /* Instance name */
struct driver_info *info; /* Points to info for this driver */
void *options_block; /* Pointer to private options */
+
uschar *driver_name; /* All start with this generic option */
+ const uschar *srcfile; /* and config source info for errors */
+ int srcline;
} driver_instance;
typedef struct driver_info {
uschar *driver_name; /* Name of driver */
+
optionlist *options; /* Table of private options names */
int *options_count; /* -> Number of entries in table */
void *options_block; /* Points to default private block */
struct transport_info *info; /* Info for this driver */
void *options_block; /* Pointer to private options */
uschar *driver_name; /* Must be first */
+ const uschar *srcfile;
+ int srcline;
+
int (*setup)( /* Setup entry point */
struct transport_instance *,
struct address_item *,
uschar *remove_headers; /* Remove these headers */
uschar *return_path; /* Overriding (rewriting) return path */
uschar *debug_string; /* Debugging output */
+ uschar *max_parallel; /* Number of concurrent instances */
uschar *message_size_limit; /* Biggest message this transport handles */
uschar *headers_rewrite; /* Rules for rewriting headers */
rewrite_rule *rewrite_rules; /* Parsed rewriting rules */
BOOL log_fail_output;
BOOL log_defer_output;
BOOL retry_use_local_part; /* Defaults true for local, false for remote */
-#ifdef EXPERIMENTAL_EVENT
+#ifndef DISABLE_EVENT
uschar *event_action; /* String to expand on notable events */
#endif
} transport_instance;
} transport_info;
+/* smtp transport datachunk callback */
+
+#define tc_reap_prev BIT(0) /* Flags: reap previous SMTP cmd responses */
+#define tc_chunk_last BIT(1) /* annotate chunk SMTP cmd as LAST */
+
+struct transport_context;
+typedef int (*tpt_chunk_cmd_cb)(struct transport_context *, unsigned, unsigned);
+
+/* Structure for information about a delivery-in-progress */
+
+typedef struct transport_context {
+ union { /* discriminated by option topt_output_string */
+ int fd; /* file descriptor to write message to */
+ gstring * msg; /* allocated string with written message */
+ } u;
+ transport_instance * tblock; /* transport */
+ struct address_item * addr;
+ uschar * check_string; /* string replacement */
+ uschar * escape_string;
+ int options; /* output processing topt_* */
+
+ /* items below only used with option topt_use_bdat */
+ tpt_chunk_cmd_cb chunk_cb; /* per-datachunk callback */
+ void * smtp_context;
+} transport_ctx;
+
+
+
+typedef struct {
+ uschar *request;
+ uschar *require;
+} dnssec_domains;
/* Structure for holding information about the configured routers. */
struct router_info *info;
void *options_block; /* Pointer to private options */
uschar *driver_name; /* Must be first */
+ const uschar *srcfile;
+ int srcline;
uschar *address_data; /* Arbitrary data */
#ifdef EXPERIMENTAL_BRIGHTMAIL
BOOL retry_use_local_part; /* Just what it says */
BOOL same_domain_copy_routing; /* TRUE => copy routing for same domain */
BOOL self_rewrite; /* TRUE to rewrite headers if making local */
+ uschar *set; /* Variable = value to set; list */
BOOL suffix_optional; /* As it says */
BOOL verify_only; /* Skip this router if not verifying */
BOOL verify_recipient; /* Use this router when verifying a recipient*/
transport_instance *transport; /* Transport block (when found) */
struct router_instance *pass_router; /* Actual router for passed address */
struct router_instance *redirect_router; /* Actual router for generated address */
+
+ dnssec_domains dnssec;
} router_instance;
struct auth_info *info; /* Pointer to driver info block */
void *options_block; /* Pointer to private options */
uschar *driver_name; /* Must be first */
+ const uschar *srcfile;
+ int srcline;
+
uschar *advertise_condition; /* Are we going to advertise this?*/
uschar *client_condition; /* Should the client try this? */
uschar *public_name; /* Advertised name */
uschar *); /* rest of AUTH command */
int (*clientcode)( /* client function */
struct auth_instance *,
- struct smtp_inblock *, /* socket and input buffer */
- struct smtp_outblock *, /* socket and output buffer */
+ void *, /* smtp conn, with socket, output and input buffers */
int, /* command timeout */
uschar *, /* buffer for reading response */
int); /* sizeof buffer */
- void (*version_report)( /* diagnostic version reporting */
- FILE *); /* I/O stream to print to */
+ gstring * (*version_report)( /* diagnostic version reporting */
+ gstring *); /* string to append to */
+ void (*macros_create)(void); /* feature-macro creation */
} auth_info;
int port;
BOOL v6_include_v4; /* Used in the daemon */
uschar address[46];
+ uschar * log; /* portion of "listening on" log line */
} ip_address_item;
/* Structure for chaining together arbitrary strings. */
uschar *errors_address; /* where to send errors (NULL => sender) */
header_line *extra_headers; /* additional headers */
uschar *remove_headers; /* list of those to remove */
+ void *variables; /* router-vasriables */
- #ifdef EXPERIMENTAL_SRS
- uschar *srs_sender; /* Change return path when delivering */
- #endif
-} address_item_propagated;
-
-/* Bits for the flags field below */
-
-#define af_allow_file 0x00000001 /* allow file in generated address */
-#define af_allow_pipe 0x00000002 /* allow pipe in generated address */
-#define af_allow_reply 0x00000004 /* allow autoreply in generated address */
-#define af_dr_retry_exists 0x00000008 /* router retry record exists */
-#define af_expand_pipe 0x00000010 /* expand pipe arguments */
-#define af_file 0x00000020 /* file delivery; always with pfr */
-#define af_gid_set 0x00000040 /* gid field is set */
-#define af_home_expanded 0x00000080 /* home_dir is already expanded */
-#define af_ignore_error 0x00000100 /* ignore delivery error */
-#define af_initgroups 0x00000200 /* use initgroups() for local transporting */
-#define af_local_host_removed 0x00000400 /* local host was backup */
-#define af_lt_retry_exists 0x00000800 /* local transport retry exists */
-#define af_pfr 0x00001000 /* pipe or file or reply delivery */
-#define af_retry_skipped 0x00002000 /* true if retry caused some skipping */
-#define af_retry_timedout 0x00004000 /* true if retry timed out */
-#define af_uid_set 0x00008000 /* uid field is set */
-#define af_hide_child 0x00010000 /* hide child in bounce/defer msgs */
-#define af_sverify_told 0x00020000 /* sender verify failure notified */
-#define af_verify_pmfail 0x00040000 /* verify failure was postmaster callout */
-#define af_verify_nsfail 0x00080000 /* verify failure was null sender callout */
-#define af_homonym 0x00100000 /* an ancestor has same address */
-#define af_verify_routed 0x00200000 /* for cached sender verify: routed OK */
-#define af_verify_callout 0x00400000 /* for cached sender verify: callout was specified */
-#define af_include_affixes 0x00800000 /* delivered with affixes in RCPT */
-#define af_cert_verified 0x01000000 /* delivered with verified TLS cert */
-#define af_pass_message 0x02000000 /* pass message in bounces */
-#define af_bad_reply 0x04000000 /* filter could not generate autoreply */
-#ifndef DISABLE_PRDR
-# define af_prdr_used 0x08000000 /* delivery used SMTP PRDR */
+ BOOL ignore_error:1; /* ignore delivery error */
+#ifdef SUPPORT_I18N
+ BOOL utf8_msg:1; /* requires SMTPUTF8 processing */
+ BOOL utf8_downcvt:1; /* mandatory downconvert on delivery */
+ BOOL utf8_downcvt_maybe:1; /* optional downconvert on delivery */
#endif
-#define af_force_command 0x10000000 /* force_command in pipe transport */
-#ifdef EXPERIMENTAL_DANE
-# define af_dane_verified 0x20000000 /* TLS cert verify done with DANE */
-#endif
-
-/* These flags must be propagated when a child is created */
+} address_item_propagated;
-#define af_propagate (af_ignore_error)
/* The main address structure. Note that fields that are to be copied to
generated addresses should be put in the address_item_propagated structure (see
uschar *lc_local_part; /* lowercased local part */
uschar *local_part; /* points to cc or lc version */
uschar *prefix; /* stripped prefix of local part */
+ uschar *prefix_v; /* variable part of above */
uschar *suffix; /* stripped suffix of local part */
- uschar *domain; /* working domain (lower cased) */
+ uschar *suffix_v; /* variable part of above */
+ const uschar *domain; /* working domain (lower cased) */
uschar *address_retry_key; /* retry key including full address */
uschar *domain_retry_key; /* retry key for domain only */
uschar *self_hostname; /* after self=pass */
uschar *shadow_message; /* info about shadow transporting */
- #ifdef SUPPORT_TLS
+#ifndef DISABLE_TLS
+ const uschar *tlsver; /* version used for transport */
uschar *cipher; /* Cipher used for transport */
void *ourcert; /* Certificate offered to peer, binary */
void *peercert; /* Certificate from peer, binary */
uschar *peerdn; /* DN of server's certificate */
int ocsp; /* OCSP status of peer cert */
- #endif
+#endif
+
+#ifdef EXPERIMENTAL_DSN_INFO
+ const uschar *smtp_greeting; /* peer self-identification */
+ const uschar *helo_response; /* peer message */
+#endif
uschar *authenticator; /* auth driver name used by transport */
uschar *auth_id; /* auth "login" name used by transport */
uid_t uid; /* uid for transporting */
gid_t gid; /* gid for transporting */
- unsigned int flags; /* a row of bits, defined above */
+ /* flags */
+ struct {
+ BOOL af_allow_file:1; /* allow file in generated address */
+ BOOL af_allow_pipe:1; /* allow pipe in generated address */
+ BOOL af_allow_reply:1; /* allow autoreply in generated address */
+ BOOL af_dr_retry_exists:1; /* router retry record exists */
+ BOOL af_expand_pipe:1; /* expand pipe arguments */
+ BOOL af_file:1; /* file delivery; always with pfr */
+ BOOL af_gid_set:1; /* gid field is set */
+ BOOL af_home_expanded:1; /* home_dir is already expanded */
+ BOOL af_initgroups:1; /* use initgroups() for local transporting */
+ BOOL af_local_host_removed:1; /* local host was backup */
+ BOOL af_lt_retry_exists:1; /* local transport retry exists */
+ BOOL af_pfr:1; /* pipe or file or reply delivery */
+ BOOL af_retry_skipped:1; /* true if retry caused some skipping */
+ BOOL af_retry_timedout:1; /* true if retry timed out */
+ BOOL af_uid_set:1; /* uid field is set */
+ BOOL af_hide_child:1; /* hide child in bounce/defer msgs */
+ BOOL af_sverify_told:1; /* sender verify failure notified */
+ BOOL af_verify_pmfail:1; /* verify failure was postmaster callout */
+ BOOL af_verify_nsfail:1; /* verify failure was null sender callout */
+ BOOL af_homonym:1; /* an ancestor has same address */
+ BOOL af_verify_routed:1; /* for cached sender verify: routed OK */
+ BOOL af_verify_callout:1; /* for cached sender verify: callout was specified */
+ BOOL af_include_affixes:1; /* delivered with affixes in RCPT */
+ BOOL af_new_conn:1; /* delivered on an fresh TCP conn */
+ BOOL af_cont_conn:1; /* delivered (with new MAIL cmd) on an existing TCP conn */
+ BOOL af_cert_verified:1; /* delivered with verified TLS cert */
+ BOOL af_pass_message:1; /* pass message in bounces */
+ BOOL af_bad_reply:1; /* filter could not generate autoreply */
+ BOOL af_tcp_fastopen_conn:1; /* delivery connection used TCP Fast Open */
+ BOOL af_tcp_fastopen:1; /* delivery usefully used TCP Fast Open */
+ BOOL af_tcp_fastopen_data:1; /* delivery sent SMTP commands on TCP Fast Open */
+ BOOL af_pipelining:1; /* delivery used (traditional) pipelining */
+#ifndef DISABLE_PIPE_CONNECT
+ BOOL af_early_pipe:1; /* delivery used connect-time pipelining */
+#endif
+#ifndef DISABLE_PRDR
+ BOOL af_prdr_used:1; /* delivery used SMTP PRDR */
+#endif
+ BOOL af_chunking_used:1; /* delivery used SMTP CHUNKING */
+ BOOL af_force_command:1; /* force_command in pipe transport */
+#ifdef SUPPORT_DANE
+ BOOL af_dane_verified:1; /* TLS cert verify done with DANE */
+#endif
+#ifdef SUPPORT_I18N
+ BOOL af_utf8_downcvt:1; /* downconvert was done for delivery */
+#endif
+#ifndef DISABLE_TLS_RESUME
+ BOOL af_tls_resume:1; /* TLS used a resumed session */
+#endif
+ } flags;
+
unsigned int domain_cache[(MAX_NAMED_LIST * 2)/32];
unsigned int localpart_cache[(MAX_NAMED_LIST * 2)/32];
int mode; /* mode for local transporting to a file */
+ int basic_errno; /* status after failure */
int more_errno; /* additional error information */
- /* (may need to hold a timestamp) */
+ struct timeval delivery_time; /* time taken to do delivery/attempt */
- short int basic_errno; /* status after failure */
- short int child_count; /* number of child addresses */
+ unsigned short child_count; /* number of child addresses */
short int return_file; /* fileno of return data file */
short int special_action; /* ( used when when deferred or failed */
/* ( also */
/* ( also */
/* ( contains verify rc in sender verify cache */
short int transport_return; /* result of delivery attempt */
- address_item_propagated p; /* fields that are propagated to children */
+ address_item_propagated prop; /* fields that are propagated to children */
} address_item;
/* The table of header names consists of items of this type */
typedef struct error_block {
struct error_block *next;
- uschar *text1;
+ const uschar *text1;
uschar *text2;
} error_block;
uschar name[1]; /* node name - variable length */
} tree_node;
+/* Structure for holding time-limited data such as DNS returns.
+We use this rather than extending tree_node to avoid wasting
+space for most tree use (variables...) at the cost of complexity
+for the lookups cache.
+We also store any options used for the lookup. */
+
+typedef struct expiring_data {
+ time_t expiry; /* if nonzero, data invalid after this time */
+ const uschar * opts; /* options, or NULL */
+ union
+ {
+ void * ptr; /* pointer to data */
+ int val; /* or integer data */
+ } data;
+} expiring_data;
+
/* Structure for holding the handle and the cached last lookup for searches.
This block is pointed to by the tree entry for the file. The file can get
closed if too many are opened at once. There is a LRU chain for deciding which
uncompressed, but the data pointer is into the raw data. */
typedef struct {
- uschar name[DNS_MAXNAME]; /* domain name */
- int type; /* record type */
- int size; /* size of data */
- uschar *data; /* pointer to data */
+ uschar name[DNS_MAXNAME]; /* domain name */
+ int type; /* record type */
+ unsigned short ttl; /* time-to-live, seconds */
+ int size; /* size of data */
+ const uschar *data; /* pointer to data */
} dns_record;
-/* Structure for holding the result of a DNS query. */
+/* Structure for holding the result of a DNS query. A touch over
+64k big, so take care to release as soon as possible. */
typedef struct {
int answerlen; /* length of the answer */
- uschar answer[MAXPACKET]; /* the answer itself */
+ uschar answer[NS_MAXMSG]; /* the answer itself */
} dns_answer;
/* Structure for holding the intermediate data while scanning a DNS answer
block. */
typedef struct {
- int rrcount; /* count of RRs in the answer */
- uschar *aptr; /* pointer in the answer while scanning */
- dns_record srr; /* data from current record in scan */
+ int rrcount; /* count of RRs in the answer */
+ const uschar *aptr; /* pointer in the answer while scanning */
+ dns_record srr; /* data from current record in scan */
} dns_scan;
/* Structure for holding a chain of IP addresses that are extracted from
typedef struct sha1 {
unsigned int H[5];
unsigned int length;
- }
-sha1;
+} sha1;
+
+/* Information for making an smtp connection */
+typedef struct {
+ transport_instance * tblock;
+ void * ob; /* smtp_transport_options_block * */
+ host_item * host;
+ int host_af;
+ uschar * interface;
+
+#ifdef SUPPORT_DANE
+ BOOL dane:1; /* connection must do dane */
+ dns_answer tlsa_dnsa; /* strictly, this should use tainted mem */
+#endif
+} smtp_connect_args;
+
+/* A client-initiated connection. If TLS, the second element is non-NULL */
+typedef struct {
+ int sock;
+ void * tls_ctx;
+} client_conn_ctx;
+
/* Structure used to hold incoming packets of SMTP responses for a specific
socket. The packets which may contain multiple lines (and in some cases,
multiple responses). */
typedef struct smtp_inblock {
- int sock; /* the socket */
+ client_conn_ctx * cctx; /* the connection */
int buffersize; /* the size of the buffer */
uschar *ptr; /* current position in the buffer */
uschar *ptrend; /* end of data in the buffer */
is in use. */
typedef struct smtp_outblock {
- int sock; /* the socket */
+ client_conn_ctx * cctx; /* the connection */
int cmd_count; /* count of buffered commands */
int buffersize; /* the size of the buffer */
BOOL authenticating; /* TRUE when authenticating */
uschar *ptr; /* current position in the buffer */
uschar *buffer; /* the buffer itself */
+
+ smtp_connect_args * conn_args; /* to make connection, if not yet made */
} smtp_outblock;
/* Structure to hold information about the source of redirection information */
/* Structure for passing arguments to check_host() */
typedef struct check_host_block {
- uschar *host_name;
- uschar *host_address;
- uschar *host_ipv4;
+ const uschar *host_name;
+ const uschar *host_address;
+ const uschar *host_ipv4;
BOOL negative;
} check_host_block;
/* Structure for holding data for an entry in a named list */
typedef struct namedlist_block {
- uschar *string; /* the list string */
- namedlist_cacheblock *cache_data; /* cached domain_data or localpart_data */
- int number; /* the number of the list for caching */
+ const uschar *string; /* the list string */
+ namedlist_cacheblock *cache_data; /* cached domain_data or localpart_data */
+ short number; /* the number of the list for caching */
+ BOOL hide; /* -bP does not display value */
} namedlist_block;
/* Structures for Access Control Lists */
typedef struct acl_condition_block {
- struct acl_condition_block *next;
- uschar *arg;
- int type;
+ struct acl_condition_block * next;
+ uschar * arg;
+ int type;
union {
- BOOL negated;
- uschar *varname;
+ BOOL negated;
+ uschar * varname;
} u;
} acl_condition_block;
typedef struct acl_block {
- struct acl_block *next;
- acl_condition_block *condition;
- int verb;
+ struct acl_block * next;
+ acl_condition_block * condition;
+ int verb;
+ int srcline;
+ const uschar * srcfile;
} acl_block;
+/* smtp transport calc outbound_ip */
+typedef BOOL (*oicf) (uschar *message_id, void *data);
+
+/* DKIM information for transport */
+struct ob_dkim {
+ uschar *dkim_domain;
+ uschar *dkim_identity;
+ uschar *dkim_private_key;
+ uschar *dkim_selector;
+ uschar *dkim_canon;
+ uschar *dkim_sign_headers;
+ uschar *dkim_strict;
+ uschar *dkim_hash;
+ uschar *dkim_timestamps;
+ BOOL dot_stuffed;
+ BOOL force_bodyhash;
+#ifdef EXPERIMENTAL_ARC
+ uschar *arc_signspec;
+#endif
+};
+
/* End of structs.h */
git://git.exim.org / exim.git / blobdiff