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|
/* $OpenBSD: smtpd.h,v 1.434 2013/11/18 12:24:26 eric Exp $ */
/*
* Copyright (c) 2008 Gilles Chehade <gilles@poolp.org>
* Copyright (c) 2008 Pierre-Yves Ritschard <pyr@openbsd.org>
* Copyright (c) 2012 Eric Faurot <eric@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef nitems
#define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
#endif
#include "smtpd-defines.h"
#include "smtpd-api.h"
#include "ioev.h"
#include "iobuf.h"
#define CONF_FILE "/etc/mail/smtpd.conf"
#define MAILNAME_FILE "/etc/mail/mailname"
#define CA_FILE "/etc/ssl/cert.pem"
#define PROC_COUNT 10
#define MAX_HOPS_COUNT 100
#define DEFAULT_MAX_BODY_SIZE (35*1024*1024)
#define MAX_TAG_SIZE 32
#define MAX_FILTER_NAME 32
#define EXPAND_BUFFER 1024
#define SMTPD_QUEUE_EXPIRY (4 * 24 * 60 * 60)
#define SMTPD_USER "_smtpd"
#define SMTPD_QUEUE_USER "_smtpq"
#define SMTPD_SOCKET "/var/run/smtpd.sock"
#ifndef SMTPD_NAME
#define SMTPD_NAME "OpenSMTPD"
#endif
#define SMTPD_VERSION "5.4"
#define SMTPD_BANNER "220 %s ESMTP %s"
#define SMTPD_SESSION_TIMEOUT 300
#define SMTPD_BACKLOG 5
#define PATH_SMTPCTL "/usr/sbin/smtpctl"
#define PATH_CHROOT "/var/empty"
#define PATH_SPOOL "/var/spool/smtpd"
#define PATH_OFFLINE "/offline"
#define PATH_PURGE "/purge"
#define PATH_TEMPORARY "/temporary"
#define PATH_FILTERS "/usr/libexec/smtpd"
#define PATH_TABLES "/usr/libexec/smtpd"
#define F_STARTTLS 0x01
#define F_SMTPS 0x02
#define F_TLS_OPTIONAL 0x04
#define F_SSL (F_STARTTLS | F_SMTPS)
#define F_AUTH 0x08
#define F_BACKUP 0x10 /* XXX - MUST BE SYNC-ED WITH RELAY_BACKUP */
#define F_STARTTLS_REQUIRE 0x20
#define F_AUTH_REQUIRE 0x40
#define F_LMTP 0x80
#define F_MASK_SOURCE 0x100
#define F_TLS_VERIFY 0x200
/* must match F_* for mta */
#define RELAY_STARTTLS 0x01
#define RELAY_SMTPS 0x02
#define RELAY_TLS_OPTIONAL 0x04
#define RELAY_SSL (RELAY_STARTTLS | RELAY_SMTPS)
#define RELAY_AUTH 0x08
#define RELAY_BACKUP 0x10 /* XXX - MUST BE SYNC-ED WITH F_BACKUP */
#define RELAY_MX 0x20
#define RELAY_LMTP 0x80
#define RELAY_TLS_VERIFY 0x200
struct userinfo {
char username[SMTPD_MAXLOGNAME];
char directory[SMTPD_MAXPATHLEN];
uid_t uid;
gid_t gid;
};
struct netaddr {
struct sockaddr_storage ss;
int bits;
};
struct relayhost {
uint16_t flags;
char hostname[SMTPD_MAXHOSTNAMELEN];
uint16_t port;
char cert[SMTPD_MAXPATHLEN];
char authtable[SMTPD_MAXPATHLEN];
char authlabel[SMTPD_MAXPATHLEN];
char sourcetable[SMTPD_MAXPATHLEN];
char heloname[SMTPD_MAXHOSTNAMELEN];
char helotable[SMTPD_MAXPATHLEN];
};
struct credentials {
char username[SMTPD_MAXLINESIZE];
char password[SMTPD_MAXLINESIZE];
};
struct destination {
char name[SMTPD_MAXHOSTNAMELEN];
};
struct source {
struct sockaddr_storage addr;
};
struct addrname {
struct sockaddr_storage addr;
char name[SMTPD_MAXHOSTNAMELEN];
};
union lookup {
struct expand *expand;
struct credentials creds;
struct netaddr netaddr;
struct source source;
struct destination domain;
struct userinfo userinfo;
struct mailaddr mailaddr;
struct addrname addrname;
};
/*
* Bump IMSG_VERSION whenever a change is made to enum imsg_type.
* This will ensure that we can never use a wrong version of smtpctl with smtpd.
*/
#define IMSG_VERSION 7
enum imsg_type {
IMSG_NONE,
IMSG_CTL_OK, /* answer to smtpctl requests */
IMSG_CTL_FAIL,
IMSG_CTL_SHUTDOWN,
IMSG_CTL_VERBOSE,
IMSG_CTL_PAUSE_EVP,
IMSG_CTL_PAUSE_MDA,
IMSG_CTL_PAUSE_MTA,
IMSG_CTL_PAUSE_SMTP,
IMSG_CTL_RESUME_EVP,
IMSG_CTL_RESUME_MDA,
IMSG_CTL_RESUME_MTA,
IMSG_CTL_RESUME_SMTP,
IMSG_CTL_RESUME_ROUTE,
IMSG_CTL_LIST_MESSAGES,
IMSG_CTL_LIST_ENVELOPES,
IMSG_CTL_REMOVE,
IMSG_CTL_SCHEDULE,
IMSG_CTL_TRACE,
IMSG_CTL_UNTRACE,
IMSG_CTL_PROFILE,
IMSG_CTL_UNPROFILE,
IMSG_CTL_MTA_SHOW_HOSTS,
IMSG_CTL_MTA_SHOW_RELAYS,
IMSG_CTL_MTA_SHOW_ROUTES,
IMSG_CTL_MTA_SHOW_HOSTSTATS,
IMSG_CONF_START,
IMSG_CONF_SSL,
IMSG_CONF_LISTENER,
IMSG_CONF_TABLE,
IMSG_CONF_TABLE_CONTENT,
IMSG_CONF_RULE,
IMSG_CONF_RULE_SOURCE,
IMSG_CONF_RULE_SENDER,
IMSG_CONF_RULE_DESTINATION,
IMSG_CONF_RULE_RECIPIENT,
IMSG_CONF_RULE_MAPPING,
IMSG_CONF_RULE_USERS,
IMSG_CONF_FILTER,
IMSG_CONF_END,
IMSG_LKA_UPDATE_TABLE,
IMSG_LKA_EXPAND_RCPT,
IMSG_LKA_SECRET,
IMSG_LKA_SOURCE,
IMSG_LKA_HELO,
IMSG_LKA_USERINFO,
IMSG_LKA_AUTHENTICATE,
IMSG_LKA_SSL_INIT,
IMSG_LKA_SSL_VERIFY_CERT,
IMSG_LKA_SSL_VERIFY_CHAIN,
IMSG_LKA_SSL_VERIFY,
IMSG_DELIVERY_OK,
IMSG_DELIVERY_TEMPFAIL,
IMSG_DELIVERY_PERMFAIL,
IMSG_DELIVERY_LOOP,
IMSG_DELIVERY_HOLD,
IMSG_DELIVERY_RELEASE,
IMSG_BOUNCE_INJECT,
IMSG_MDA_DELIVER,
IMSG_MDA_DONE,
IMSG_MFA_REQ_CONNECT,
IMSG_MFA_REQ_HELO,
IMSG_MFA_REQ_MAIL,
IMSG_MFA_REQ_RCPT,
IMSG_MFA_REQ_DATA,
IMSG_MFA_REQ_EOM,
IMSG_MFA_EVENT_RSET,
IMSG_MFA_EVENT_COMMIT,
IMSG_MFA_EVENT_ROLLBACK,
IMSG_MFA_EVENT_DISCONNECT,
IMSG_MFA_SMTP_RESPONSE,
IMSG_MTA_TRANSFER,
IMSG_MTA_SCHEDULE,
IMSG_QUEUE_CREATE_MESSAGE,
IMSG_QUEUE_SUBMIT_ENVELOPE,
IMSG_QUEUE_COMMIT_ENVELOPES,
IMSG_QUEUE_REMOVE_MESSAGE,
IMSG_QUEUE_COMMIT_MESSAGE,
IMSG_QUEUE_MESSAGE_FD,
IMSG_QUEUE_MESSAGE_FILE,
IMSG_QUEUE_REMOVE,
IMSG_QUEUE_EXPIRE,
IMSG_QUEUE_BOUNCE,
IMSG_PARENT_FORWARD_OPEN,
IMSG_PARENT_FORK_MDA,
IMSG_PARENT_KILL_MDA,
IMSG_SMTP_ENQUEUE_FD,
IMSG_DNS_HOST,
IMSG_DNS_HOST_END,
IMSG_DNS_PTR,
IMSG_DNS_MX,
IMSG_DNS_MX_PREFERENCE,
IMSG_STAT_INCREMENT,
IMSG_STAT_DECREMENT,
IMSG_STAT_SET,
IMSG_DIGEST,
IMSG_STATS,
IMSG_STATS_GET,
};
enum blockmodes {
BM_NORMAL,
BM_NONBLOCK
};
enum smtp_proc_type {
PROC_PARENT = 0,
PROC_SMTP,
PROC_MFA,
PROC_LKA,
PROC_QUEUE,
PROC_MDA,
PROC_MTA,
PROC_CONTROL,
PROC_SCHEDULER,
PROC_FILTER,
PROC_CLIENT,
};
enum table_type {
T_NONE = 0,
T_DYNAMIC = 0x01, /* table with external source */
T_LIST = 0x02, /* table holding a list */
T_HASH = 0x04, /* table holding a hash table */
};
struct table {
char t_name[SMTPD_MAXLINESIZE];
enum table_type t_type;
char t_config[SMTPD_MAXPATHLEN];
struct dict t_dict;
void *t_handle;
struct table_backend *t_backend;
void *t_iter;
};
struct table_backend {
const unsigned int services;
int (*config)(struct table *);
void *(*open)(struct table *);
int (*update)(struct table *);
void (*close)(void *);
int (*lookup)(void *, const char *, enum table_service, union lookup *);
int (*fetch)(void *, enum table_service, union lookup *);
};
enum dest_type {
DEST_DOM,
DEST_VDOM
};
enum action_type {
A_NONE,
A_RELAY,
A_RELAYVIA,
A_MAILDIR,
A_MBOX,
A_FILENAME,
A_MDA,
A_LMTP
};
enum decision {
R_REJECT,
R_ACCEPT
};
struct rule {
TAILQ_ENTRY(rule) r_entry;
enum decision r_decision;
uint8_t r_nottag;
char r_tag[MAX_TAG_SIZE];
uint8_t r_notsources;
struct table *r_sources;
uint8_t r_notsenders;
struct table *r_senders;
uint8_t r_notrecipients;
struct table *r_recipients;
uint8_t r_notdestination;
enum dest_type r_desttype;
struct table *r_destination;
enum action_type r_action;
union rule_dest {
char buffer[EXPAND_BUFFER];
struct relayhost relayhost;
} r_value;
struct mailaddr *r_as;
struct table *r_mapping;
struct table *r_userbase;
time_t r_qexpire;
uint8_t r_forwardonly;
};
struct delivery_mda {
enum action_type method;
char usertable[SMTPD_MAXPATHLEN];
char username[SMTPD_MAXLOGNAME];
char buffer[EXPAND_BUFFER];
};
struct delivery_mta {
struct relayhost relay;
};
enum bounce_type {
B_ERROR,
B_WARNING,
};
struct delivery_bounce {
enum bounce_type type;
time_t delay;
time_t expire;
};
enum expand_type {
EXPAND_INVALID,
EXPAND_USERNAME,
EXPAND_FILENAME,
EXPAND_FILTER,
EXPAND_INCLUDE,
EXPAND_ADDRESS,
EXPAND_ERROR
};
struct expandnode {
RB_ENTRY(expandnode) entry;
TAILQ_ENTRY(expandnode) tq_entry;
enum expand_type type;
int sameuser;
int alias;
struct rule *rule;
struct expandnode *parent;
unsigned int depth;
struct table *mapping;
struct table *userbase;
union {
/*
* user field handles both expansion user and system user
* so we MUST make it large enough to fit a mailaddr user
*/
char user[SMTPD_MAXLOCALPARTSIZE];
char buffer[EXPAND_BUFFER];
struct mailaddr mailaddr;
} u;
};
struct expand {
RB_HEAD(expandtree, expandnode) tree;
TAILQ_HEAD(xnodes, expandnode) *queue;
int alias;
size_t nb_nodes;
struct rule *rule;
struct expandnode *parent;
};
#define SMTPD_ENVELOPE_VERSION 2
struct envelope {
TAILQ_ENTRY(envelope) entry;
char tag[MAX_TAG_SIZE];
uint32_t version;
uint64_t id;
enum envelope_flags flags;
char smtpname[SMTPD_MAXHOSTNAMELEN];
char helo[SMTPD_MAXHOSTNAMELEN];
char hostname[SMTPD_MAXHOSTNAMELEN];
char errorline[SMTPD_MAXLINESIZE];
struct sockaddr_storage ss;
struct mailaddr sender;
struct mailaddr rcpt;
struct mailaddr dest;
enum delivery_type type;
union {
struct delivery_mda mda;
struct delivery_mta mta;
struct delivery_bounce bounce;
} agent;
uint16_t retry;
time_t creation;
time_t expire;
time_t lasttry;
time_t nexttry;
time_t lastbounce;
};
struct listener {
uint16_t flags;
int fd;
struct sockaddr_storage ss;
in_port_t port;
struct timeval timeout;
struct event ev;
char ssl_cert_name[SMTPD_MAXPATHLEN];
struct ssl *ssl;
void *ssl_ctx;
char tag[MAX_TAG_SIZE];
char authtable[SMTPD_MAXLINESIZE];
char hostname[SMTPD_MAXHOSTNAMELEN];
char hostnametable[SMTPD_MAXPATHLEN];
TAILQ_ENTRY(listener) entry;
};
struct smtpd {
char sc_conffile[SMTPD_MAXPATHLEN];
size_t sc_maxsize;
#define SMTPD_OPT_VERBOSE 0x00000001
#define SMTPD_OPT_NOACTION 0x00000002
uint32_t sc_opts;
#define SMTPD_CONFIGURING 0x00000001
#define SMTPD_EXITING 0x00000002
#define SMTPD_MDA_PAUSED 0x00000004
#define SMTPD_MTA_PAUSED 0x00000008
#define SMTPD_SMTP_PAUSED 0x00000010
#define SMTPD_MDA_BUSY 0x00000020
#define SMTPD_MTA_BUSY 0x00000040
#define SMTPD_BOUNCE_BUSY 0x00000080
#define SMTPD_SMTP_DISABLED 0x00000100
uint32_t sc_flags;
#define QUEUE_COMPRESSION 0x00000001
#define QUEUE_ENCRYPTION 0x00000002
#define QUEUE_EVPCACHE 0x00000004
uint32_t sc_queue_flags;
char *sc_queue_key;
size_t sc_queue_evpcache_size;
int sc_qexpire;
#define MAX_BOUNCE_WARN 4
time_t sc_bounce_warn[MAX_BOUNCE_WARN];
char sc_hostname[SMTPD_MAXHOSTNAMELEN];
struct stat_backend *sc_stat;
struct compress_backend *sc_comp;
time_t sc_uptime;
TAILQ_HEAD(listenerlist, listener) *sc_listeners;
TAILQ_HEAD(rulelist, rule) *sc_rules, *sc_rules_reload;
struct dict *sc_ssl_dict;
struct dict *sc_tables_dict; /* keyed lookup */
struct dict *sc_limits_dict;
struct dict sc_filters;
uint32_t filtermask;
};
#define TRACE_DEBUG 0x0001
#define TRACE_IMSG 0x0002
#define TRACE_IO 0x0004
#define TRACE_SMTP 0x0008
#define TRACE_MFA 0x0010
#define TRACE_MTA 0x0020
#define TRACE_BOUNCE 0x0040
#define TRACE_SCHEDULER 0x0080
#define TRACE_LOOKUP 0x0100
#define TRACE_STAT 0x0200
#define TRACE_RULES 0x0400
#define TRACE_MPROC 0x0800
#define TRACE_EXPAND 0x1000
#define TRACE_TABLES 0x2000
#define TRACE_QUEUE 0x4000
#define PROFILE_TOSTAT 0x0001
#define PROFILE_IMSG 0x0002
#define PROFILE_QUEUE 0x0004
struct forward_req {
uint64_t id;
uint8_t status;
char user[SMTPD_MAXLOGNAME];
uid_t uid;
gid_t gid;
char directory[SMTPD_MAXPATHLEN];
};
struct deliver {
char to[SMTPD_MAXPATHLEN];
char from[SMTPD_MAXPATHLEN];
char user[SMTPD_MAXLOGNAME];
short mode;
struct userinfo userinfo;
};
#define MAX_FILTER_PER_CHAIN 16
struct filter {
int chain;
int done;
char name[MAX_FILTER_NAME];
char path[SMTPD_MAXPATHLEN];
char filters[MAX_FILTER_NAME][MAX_FILTER_PER_CHAIN];
};
struct mta_host {
SPLAY_ENTRY(mta_host) entry;
struct sockaddr *sa;
char *ptrname;
int refcount;
size_t nconn;
time_t lastconn;
time_t lastptrquery;
#define HOST_IGNORE 0x01
int flags;
};
struct mta_mx {
TAILQ_ENTRY(mta_mx) entry;
struct mta_host *host;
int preference;
};
struct mta_domain {
SPLAY_ENTRY(mta_domain) entry;
char *name;
int flags;
TAILQ_HEAD(, mta_mx) mxs;
int mxstatus;
int refcount;
size_t nconn;
time_t lastconn;
time_t lastmxquery;
};
struct mta_source {
SPLAY_ENTRY(mta_source) entry;
struct sockaddr *sa;
int refcount;
size_t nconn;
time_t lastconn;
};
struct mta_connector {
struct mta_source *source;
struct mta_relay *relay;
#define CONNECTOR_ERROR_FAMILY 0x0001
#define CONNECTOR_ERROR_SOURCE 0x0002
#define CONNECTOR_ERROR_MX 0x0004
#define CONNECTOR_ERROR_ROUTE_NET 0x0008
#define CONNECTOR_ERROR_ROUTE_SMTP 0x0010
#define CONNECTOR_ERROR_ROUTE 0x0018
#define CONNECTOR_ERROR 0x00ff
#define CONNECTOR_LIMIT_HOST 0x0100
#define CONNECTOR_LIMIT_ROUTE 0x0200
#define CONNECTOR_LIMIT_SOURCE 0x0400
#define CONNECTOR_LIMIT_RELAY 0x0800
#define CONNECTOR_LIMIT_CONN 0x1000
#define CONNECTOR_LIMIT_DOMAIN 0x2000
#define CONNECTOR_LIMIT 0xff00
#define CONNECTOR_NEW 0x10000
#define CONNECTOR_WAIT 0x20000
int flags;
int refcount;
size_t nconn;
time_t lastconn;
};
struct mta_route {
SPLAY_ENTRY(mta_route) entry;
uint64_t id;
struct mta_source *src;
struct mta_host *dst;
#define ROUTE_NEW 0x01
#define ROUTE_RUNQ 0x02
#define ROUTE_KEEPALIVE 0x04
#define ROUTE_DISABLED 0xf0
#define ROUTE_DISABLED_NET 0x10
#define ROUTE_DISABLED_SMTP 0x20
int flags;
int nerror;
int penalty;
int refcount;
size_t nconn;
time_t lastconn;
time_t lastdisc;
time_t lastpenalty;
};
struct mta_limits {
size_t maxconn_per_host;
size_t maxconn_per_route;
size_t maxconn_per_source;
size_t maxconn_per_connector;
size_t maxconn_per_relay;
size_t maxconn_per_domain;
time_t conndelay_host;
time_t conndelay_route;
time_t conndelay_source;
time_t conndelay_connector;
time_t conndelay_relay;
time_t conndelay_domain;
time_t discdelay_route;
size_t max_mail_per_session;
time_t sessdelay_transaction;
time_t sessdelay_keepalive;
int family;
int task_hiwat;
int task_lowat;
int task_release;
};
struct mta_relay {
SPLAY_ENTRY(mta_relay) entry;
uint64_t id;
struct mta_domain *domain;
struct mta_limits *limits;
int flags;
char *backupname;
int backuppref;
char *sourcetable;
uint16_t port;
char *cert;
char *authtable;
char *authlabel;
char *helotable;
char *heloname;
char *secret;
int state;
size_t ntask;
TAILQ_HEAD(, mta_task) tasks;
struct tree connectors;
size_t sourceloop;
time_t lastsource;
time_t nextsource;
int fail;
char *failstr;
#define RELAY_WAIT_MX 0x01
#define RELAY_WAIT_PREFERENCE 0x02
#define RELAY_WAIT_SECRET 0x04
#define RELAY_WAIT_LIMITS 0x08
#define RELAY_WAIT_SOURCE 0x10
#define RELAY_WAIT_CONNECTOR 0x20
#define RELAY_WAITMASK 0x3f
int status;
int refcount;
size_t nconn;
size_t nconn_ready;
time_t lastconn;
};
struct mta_envelope {
TAILQ_ENTRY(mta_envelope) entry;
uint64_t id;
uint64_t session;
time_t creation;
char *dest;
char *rcpt;
struct mta_task *task;
int delivery;
};
struct mta_task {
TAILQ_ENTRY(mta_task) entry;
struct mta_relay *relay;
uint32_t msgid;
TAILQ_HEAD(, mta_envelope) envelopes;
char *sender;
};
struct passwd;
struct queue_backend {
int (*init)(struct passwd *, int);
};
struct compress_backend {
size_t (*compress_chunk)(void *, size_t, void *, size_t);
size_t (*uncompress_chunk)(void *, size_t, void *, size_t);
int (*compress_file)(FILE *, FILE *);
int (*uncompress_file)(FILE *, FILE *);
};
/* auth structures */
enum auth_type {
AUTH_BSD,
AUTH_PWD,
};
struct auth_backend {
int (*authenticate)(char *, char *);
};
/* delivery_backend */
struct delivery_backend {
int allow_root;
void (*open)(struct deliver *);
};
struct scheduler_backend {
int (*init)(void);
int (*insert)(struct scheduler_info *);
size_t (*commit)(uint32_t);
size_t (*rollback)(uint32_t);
int (*update)(struct scheduler_info *);
int (*delete)(uint64_t);
int (*hold)(uint64_t, uint64_t);
int (*release)(uint64_t, int);
int (*batch)(int, struct scheduler_batch *);
size_t (*messages)(uint32_t, uint32_t *, size_t);
size_t (*envelopes)(uint64_t, struct evpstate *, size_t);
int (*schedule)(uint64_t);
int (*remove)(uint64_t);
int (*suspend)(uint64_t);
int (*resume)(uint64_t);
};
enum stat_type {
STAT_COUNTER,
STAT_TIMESTAMP,
STAT_TIMEVAL,
STAT_TIMESPEC,
};
struct stat_value {
enum stat_type type;
union stat_v {
size_t counter;
time_t timestamp;
struct timeval tv;
struct timespec ts;
} u;
};
#define STAT_KEY_SIZE 1024
struct stat_kv {
void *iter;
char key[STAT_KEY_SIZE];
struct stat_value val;
};
struct stat_backend {
void (*init)(void);
void (*close)(void);
void (*increment)(const char *, size_t);
void (*decrement)(const char *, size_t);
void (*set)(const char *, const struct stat_value *);
int (*iter)(void **, char **, struct stat_value *);
};
struct stat_digest {
time_t startup;
time_t timestamp;
size_t clt_connect;
size_t clt_disconnect;
size_t evp_enqueued;
size_t evp_dequeued;
size_t evp_expired;
size_t evp_removed;
size_t evp_bounce;
size_t dlv_ok;
size_t dlv_permfail;
size_t dlv_tempfail;
size_t dlv_loop;
};
struct mproc {
pid_t pid;
char *name;
int proc;
void (*handler)(struct mproc *, struct imsg *);
struct imsgbuf imsgbuf;
char *m_buf;
size_t m_alloc;
size_t m_pos;
uint32_t m_type;
uint32_t m_peerid;
pid_t m_pid;
int m_fd;
int enable;
short events;
struct event ev;
void *data;
off_t msg_in;
off_t msg_out;
off_t bytes_in;
off_t bytes_out;
size_t bytes_queued;
size_t bytes_queued_max;
};
struct msg {
const uint8_t *pos;
const uint8_t *end;
};
extern enum smtp_proc_type smtpd_process;
extern int verbose;
extern int profiling;
extern struct mproc *p_control;
extern struct mproc *p_parent;
extern struct mproc *p_lka;
extern struct mproc *p_mda;
extern struct mproc *p_mfa;
extern struct mproc *p_mta;
extern struct mproc *p_queue;
extern struct mproc *p_scheduler;
extern struct mproc *p_smtp;
extern struct smtpd *env;
extern void (*imsg_callback)(struct mproc *, struct imsg *);
struct imsgproc {
pid_t pid;
struct event ev;
struct imsgbuf *ibuf;
char *path;
char *name;
void (*cb)(struct imsg *, void *);
void *cb_arg;
};
/* inter-process structures */
struct bounce_req_msg {
uint64_t evpid;
time_t timestamp;
struct delivery_bounce bounce;
};
enum mfa_resp_status {
MFA_OK,
MFA_FAIL,
MFA_CLOSE,
};
enum dns_error {
DNS_OK = 0,
DNS_RETRY,
DNS_EINVAL,
DNS_ENONAME,
DNS_ENOTFOUND,
};
enum lka_resp_status {
LKA_OK,
LKA_TEMPFAIL,
LKA_PERMFAIL
};
enum ca_resp_status {
CA_OK,
CA_FAIL
};
struct ca_cert_req_msg {
uint64_t reqid;
char name[SMTPD_MAXPATHLEN];
};
struct ca_cert_resp_msg {
uint64_t reqid;
enum ca_resp_status status;
char *cert;
off_t cert_len;
char *key;
off_t key_len;
};
struct ca_vrfy_req_msg {
uint64_t reqid;
char pkiname[SMTPD_MAXHOSTNAMELEN];
unsigned char *cert;
off_t cert_len;
size_t n_chain;
size_t chain_offset;
unsigned char **chain_cert;
off_t *chain_cert_len;
};
struct ca_vrfy_resp_msg {
uint64_t reqid;
enum ca_resp_status status;
};
/* aliases.c */
int aliases_get(struct expand *, const char *);
int aliases_virtual_check(struct table *, const struct mailaddr *);
int aliases_virtual_get(struct expand *, const struct mailaddr *);
int alias_parse(struct expandnode *, const char *);
/* auth.c */
struct auth_backend *auth_backend_lookup(enum auth_type);
/* bounce.c */
void bounce_add(uint64_t);
void bounce_fd(int);
/* ca.c */
int ca_X509_verify(void *, void *, const char *, const char *, const char **);
/* compress_backend.c */
struct compress_backend *compress_backend_lookup(const char *);
size_t compress_chunk(void *, size_t, void *, size_t);
size_t uncompress_chunk(void *, size_t, void *, size_t);
int compress_file(FILE *, FILE *);
int uncompress_file(FILE *, FILE *);
/* config.c */
#define PURGE_LISTENERS 0x01
#define PURGE_TABLES 0x02
#define PURGE_RULES 0x04
#define PURGE_SSL 0x08
#define PURGE_EVERYTHING 0xff
void purge_config(uint8_t);
void init_pipes(void);
void config_process(enum smtp_proc_type);
void config_peer(enum smtp_proc_type);
void config_done(void);
/* control.c */
pid_t control(void);
int control_create_socket(void);
/* crypto.c */
int crypto_setup(const char *, size_t);
int crypto_encrypt_file(FILE *, FILE *);
int crypto_decrypt_file(FILE *, FILE *);
size_t crypto_encrypt_buffer(const char *, size_t, char *, size_t);
size_t crypto_decrypt_buffer(const char *, size_t, char *, size_t);
/* delivery.c */
struct delivery_backend *delivery_backend_lookup(enum action_type);
/* dns.c */
void dns_query_host(uint64_t, const char *);
void dns_query_ptr(uint64_t, const struct sockaddr *);
void dns_query_mx(uint64_t, const char *);
void dns_query_mx_preference(uint64_t, const char *, const char *);
void dns_imsg(struct mproc *, struct imsg *);
/* enqueue.c */
int enqueue(int, char **);
/* envelope.c */
void envelope_set_errormsg(struct envelope *, char *, ...);
int envelope_load_buffer(struct envelope *, const char *, size_t);
int envelope_dump_buffer(const struct envelope *, char *, size_t);
/* expand.c */
int expand_cmp(struct expandnode *, struct expandnode *);
void expand_insert(struct expand *, struct expandnode *);
struct expandnode *expand_lookup(struct expand *, struct expandnode *);
void expand_clear(struct expand *);
void expand_free(struct expand *);
int expand_line(struct expand *, const char *, int);
int expand_to_text(struct expand *, char *, size_t);
RB_PROTOTYPE(expandtree, expandnode, nodes, expand_cmp);
/* forward.c */
int forwards_get(int, struct expand *);
/* imsgproc.c */
void imsgproc_init(void);
struct imsgproc *imsgproc_fork(const char *, const char *,
void (*)(struct imsg *, void *), void *);
void imsgproc_set_read(struct imsgproc *);
void imsgproc_set_write(struct imsgproc *);
void imsgproc_set_read_write(struct imsgproc *);
void imsgproc_reset_callback(struct imsgproc *, void (*)(struct imsg *, void *), void *);
/* limit.c */
void limit_mta_set_defaults(struct mta_limits *);
int limit_mta_set(struct mta_limits *, const char*, int64_t);
/* lka.c */
pid_t lka(void);
/* lka_session.c */
void lka_session(uint64_t, struct envelope *);
void lka_session_forward_reply(struct forward_req *, int);
/* log.c */
void vlog(int, const char *, va_list);
/* mda.c */
pid_t mda(void);
/* mfa.c */
pid_t mfa(void);
void mfa_ready(void);
/* mfa_session.c */
void mfa_filter_prepare(void);
void mfa_filter_init(void);
void mfa_filter_connect(uint64_t, const struct sockaddr *,
const struct sockaddr *, const char *);
void mfa_filter_mailaddr(uint64_t, int, const struct mailaddr *);
void mfa_filter_line(uint64_t, int, const char *);
void mfa_filter_eom(uint64_t, int, size_t);
void mfa_filter(uint64_t, int);
void mfa_filter_event(uint64_t, int);
void mfa_build_fd_chain(uint64_t, int);
/* mproc.c */
int mproc_fork(struct mproc *, const char*, const char *);
void mproc_init(struct mproc *, int);
void mproc_clear(struct mproc *);
void mproc_enable(struct mproc *);
void mproc_disable(struct mproc *);
void m_compose(struct mproc *, uint32_t, uint32_t, pid_t, int, void *, size_t);
void m_composev(struct mproc *, uint32_t, uint32_t, pid_t, int,
const struct iovec *, int);
void m_forward(struct mproc *, struct imsg *);
void m_create(struct mproc *, uint32_t, uint32_t, pid_t, int);
void m_add(struct mproc *, const void *, size_t);
void m_add_int(struct mproc *, int);
void m_add_u32(struct mproc *, uint32_t);
void m_add_time(struct mproc *, time_t);
void m_add_string(struct mproc *, const char *);
void m_add_data(struct mproc *, const void *, size_t);
void m_add_evpid(struct mproc *, uint64_t);
void m_add_msgid(struct mproc *, uint32_t);
void m_add_id(struct mproc *, uint64_t);
void m_add_sockaddr(struct mproc *, const struct sockaddr *);
void m_add_mailaddr(struct mproc *, const struct mailaddr *);
void m_add_envelope(struct mproc *, const struct envelope *);
void m_close(struct mproc *);
void m_msg(struct msg *, struct imsg *);
int m_is_eom(struct msg *);
void m_end(struct msg *);
void m_get_int(struct msg *, int *);
void m_get_u32(struct msg *, uint32_t *);
void m_get_time(struct msg *, time_t *);
void m_get_string(struct msg *, const char **);
void m_get_data(struct msg *, const void **, size_t *);
void m_get_evpid(struct msg *, uint64_t *);
void m_get_msgid(struct msg *, uint32_t *);
void m_get_id(struct msg *, uint64_t *);
void m_get_sockaddr(struct msg *, struct sockaddr *);
void m_get_mailaddr(struct msg *, struct mailaddr *);
void m_get_envelope(struct msg *, struct envelope *);
/* mta.c */
pid_t mta(void);
void mta_route_ok(struct mta_relay *, struct mta_route *);
void mta_route_error(struct mta_relay *, struct mta_route *);
void mta_route_down(struct mta_relay *, struct mta_route *);
void mta_route_collect(struct mta_relay *, struct mta_route *);
void mta_source_error(struct mta_relay *, struct mta_route *, const char *);
void mta_delivery_log(struct mta_envelope *, const char *, const char *, int, const char *);
void mta_delivery_notify(struct mta_envelope *, int, const char *, uint32_t);
void mta_delivery(struct mta_envelope *, const char *, const char *, int, const char *, uint32_t);
struct mta_task *mta_route_next_task(struct mta_relay *, struct mta_route *);
const char *mta_host_to_text(struct mta_host *);
const char *mta_relay_to_text(struct mta_relay *);
/* mta_session.c */
void mta_session(struct mta_relay *, struct mta_route *);
void mta_session_imsg(struct mproc *, struct imsg *);
/* parse.y */
int parse_config(struct smtpd *, const char *, int);
int cmdline_symset(char *);
/* queue.c */
pid_t queue(void);
void queue_ok(uint64_t);
void queue_tempfail(uint64_t, uint32_t, const char *);
void queue_permfail(uint64_t, const char *);
void queue_loop(uint64_t);
void queue_flow_control(void);
/* queue_backend.c */
uint32_t queue_generate_msgid(void);
uint64_t queue_generate_evpid(uint32_t);
int queue_init(const char *, int);
int queue_message_create(uint32_t *);
int queue_message_delete(uint32_t);
int queue_message_commit(uint32_t);
int queue_message_fd_r(uint32_t);
int queue_message_fd_rw(uint32_t);
int queue_message_corrupt(uint32_t);
int queue_envelope_create(struct envelope *);
int queue_envelope_delete(uint64_t);
int queue_envelope_load(uint64_t, struct envelope *);
int queue_envelope_update(struct envelope *);
int queue_envelope_walk(struct envelope *);
/* ruleset.c */
struct rule *ruleset_match(const struct envelope *);
/* scheduler.c */
pid_t scheduler(void);
/* scheduler_bakend.c */
struct scheduler_backend *scheduler_backend_lookup(const char *);
void scheduler_info(struct scheduler_info *, struct envelope *, uint32_t);
time_t scheduler_compute_schedule(struct scheduler_info *);
/* smtp.c */
pid_t smtp(void);
void smtp_collect(void);
/* smtp_session.c */
int smtp_session(struct listener *, int, const struct sockaddr_storage *,
const char *);
void smtp_session_imsg(struct mproc *, struct imsg *);
/* smtpd.c */
void imsg_dispatch(struct mproc *, struct imsg *);
void post_fork(int);
const char *proc_name(enum smtp_proc_type);
const char *proc_title(enum smtp_proc_type);
const char *imsg_to_str(int);
/* ssl_smtpd.c */
void *ssl_mta_init(char *, off_t, char *, off_t);
void *ssl_smtp_init(void *, char *, off_t, char *, off_t);
/* stat_backend.c */
struct stat_backend *stat_backend_lookup(const char *);
void stat_increment(const char *, size_t);
void stat_decrement(const char *, size_t);
void stat_set(const char *, const struct stat_value *);
struct stat_value *stat_counter(size_t);
struct stat_value *stat_timestamp(time_t);
struct stat_value *stat_timeval(struct timeval *);
struct stat_value *stat_timespec(struct timespec *);
/* table.c */
struct table *table_find(const char *, const char *);
struct table *table_create(const char *, const char *, const char *,
const char *);
int table_config(struct table *);
int table_open(struct table *);
int table_update(struct table *);
void table_close(struct table *);
int table_check_use(struct table *, uint32_t, uint32_t);
int table_check_type(struct table *, uint32_t);
int table_check_service(struct table *, uint32_t);
int table_lookup(struct table *, const char *, enum table_service,
union lookup *);
int table_fetch(struct table *, enum table_service, union lookup *);
void table_destroy(struct table *);
void table_add(struct table *, const char *, const char *);
void table_delete(struct table *, const char *);
int table_domain_match(const char *, const char *);
int table_netaddr_match(const char *, const char *);
int table_mailaddr_match(const char *, const char *);
void table_open_all(void);
void table_dump_all(void);
void table_close_all(void);
const void *table_get(struct table *, const char *);
int table_parse_lookup(enum table_service, const char *, const char *,
union lookup *);
/* to.c */
int email_to_mailaddr(struct mailaddr *, char *);
int text_to_netaddr(struct netaddr *, const char *);
int text_to_mailaddr(struct mailaddr *, const char *);
int text_to_relayhost(struct relayhost *, const char *);
int text_to_userinfo(struct userinfo *, const char *);
int text_to_credentials(struct credentials *, const char *);
int text_to_expandnode(struct expandnode *, const char *);
uint64_t text_to_evpid(const char *);
uint32_t text_to_msgid(const char *);
const char *sa_to_text(const struct sockaddr *);
const char *ss_to_text(const struct sockaddr_storage *);
const char *time_to_text(time_t);
const char *duration_to_text(time_t);
const char *relayhost_to_text(const struct relayhost *);
const char *rule_to_text(struct rule *);
const char *sockaddr_to_text(struct sockaddr *);
const char *mailaddr_to_text(const struct mailaddr *);
const char *expandnode_to_text(struct expandnode *);
/* util.c */
typedef struct arglist arglist;
struct arglist {
char **list;
uint num;
uint nalloc;
};
void addargs(arglist *, char *, ...)
__attribute__((format(printf, 2, 3)));
int bsnprintf(char *, size_t, const char *, ...)
__attribute__((format (printf, 3, 4)));
int mkdirs(char *, mode_t);
int safe_fclose(FILE *);
int hostname_match(const char *, const char *);
int valid_localpart(const char *);
int valid_domainpart(const char *);
int secure_file(int, char *, char *, uid_t, int);
int lowercase(char *, const char *, size_t);
void xlowercase(char *, const char *, size_t);
int uppercase(char *, const char *, size_t);
uint64_t generate_uid(void);
void fdlimit(double);
int availdesc(void);
int ckdir(const char *, mode_t, uid_t, gid_t, int);
int rmtree(char *, int);
int mvpurge(char *, char *);
int mktmpfile(void);
const char *parse_smtp_response(char *, size_t, char **, int *);
void *xmalloc(size_t, const char *);
void *xcalloc(size_t, size_t, const char *);
char *xstrdup(const char *, const char *);
void *xmemdup(const void *, size_t, const char *);
char *strip(char *);
void iobuf_xinit(struct iobuf *, size_t, size_t, const char *);
void iobuf_xfqueue(struct iobuf *, const char *, const char *, ...);
void log_envelope(const struct envelope *, const char *, const char *,
const char *);
void session_socket_blockmode(int, enum blockmodes);
void session_socket_no_linger(int);
int session_socket_error(int);
int getmailname(char *, size_t);
/* waitq.c */
int waitq_wait(void *, void (*)(void *, void *, void *), void *);
void waitq_run(void *, void *);
/* runq.c */
struct runq;
int runq_init(struct runq **, void (*)(struct runq *, void *));
int runq_schedule(struct runq *, time_t, void (*)(struct runq *, void *), void *);
int runq_delay(struct runq *, unsigned int, void (*)(struct runq *, void *), void *);
int runq_cancel(struct runq *, void (*)(struct runq *, void *), void *);
int runq_pending(struct runq *, void (*)(struct runq *, void *), void *, time_t *);
int runq_next(struct runq *, void (**)(struct runq *, void *), void **, time_t *);
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