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|
/* $OpenBSD: smtpd.h,v 1.182 2010/04/27 10:17:53 gilles Exp $ */
/*
* Copyright (c) 2008 Gilles Chehade <gilles@openbsd.org>
* Copyright (c) 2008 Pierre-Yves Ritschard <pyr@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.
*/
#include <imsg.h>
#ifndef nitems
#define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
#endif
#define IMSG_SIZE_CHECK(p) do { \
if (IMSG_DATA_SIZE(&imsg) != sizeof(*p)) \
fatalx("bad length imsg received"); \
} while (0)
#define IMSG_DATA_SIZE(imsg) ((imsg)->hdr.len - IMSG_HEADER_SIZE)
#define CONF_FILE "/etc/mail/smtpd.conf"
#define MAX_LISTEN 16
#define PROC_COUNT 9
#define MAX_NAME_SIZE 64
#define MAX_HOPS_COUNT 100
/* sizes include the tailing '\0' */
#define MAX_LINE_SIZE 1024
#define MAX_LOCALPART_SIZE 128
#define MAX_DOMAINPART_SIZE MAXHOSTNAMELEN
#define MAX_ID_SIZE 64
#define MAX_TAG_SIZE 32
/* return and forward path size */
#define MAX_PATH_SIZE 256
#define SMTPD_QUEUE_INTERVAL (15 * 60)
#define SMTPD_QUEUE_MAXINTERVAL (4 * 60 * 60)
#define SMTPD_QUEUE_EXPIRY (4 * 24 * 60 * 60)
#define SMTPD_USER "_smtpd"
#define SMTPD_SOCKET "/var/run/smtpd.sock"
#define SMTPD_BANNER "220 %s ESMTP OpenSMTPD"
#define SMTPD_SESSION_TIMEOUT 300
#define SMTPD_BACKLOG 5
#define PATH_MAILLOCAL "/usr/libexec/mail.local"
#define PATH_SMTPCTL "/usr/sbin/smtpctl"
#define DIRHASH_BUCKETS 4096
#define PATH_SPOOL "/var/spool/smtpd"
#define PATH_ENQUEUE "/enqueue"
#define PATH_INCOMING "/incoming"
#define PATH_QUEUE "/queue"
#define PATH_PURGE "/purge"
#define PATH_MESSAGE "/message"
#define PATH_ENVELOPES "/envelopes"
#define PATH_RUNQUEUE "/runqueue"
#define PATH_OFFLINE "/offline"
#define PATH_BOUNCE "/bounce"
/* number of MX records to lookup */
#define MAX_MX_COUNT 10
/* max response delay under flood conditions */
#define MAX_RESPONSE_DELAY 60
/* how many responses per state are undelayed */
#define FAST_RESPONSES 2
/* max len of any smtp line */
#define SMTP_LINE_MAX 16384
#define F_STARTTLS 0x01
#define F_SMTPS 0x02
#define F_AUTH 0x04
#define F_SSL (F_SMTPS|F_STARTTLS)
#define F_SCERT 0x01
#define F_CCERT 0x02
#define ADVERTISE_TLS(s) \
((s)->s_l->flags & F_STARTTLS && !((s)->s_flags & F_SECURE))
#define ADVERTISE_AUTH(s) \
((s)->s_l->flags & F_AUTH && (s)->s_flags & F_SECURE && \
!((s)->s_flags & F_AUTHENTICATED))
struct netaddr {
struct sockaddr_storage ss;
int bits;
};
struct relayhost {
u_int8_t flags;
char hostname[MAXHOSTNAMELEN];
u_int16_t port;
char cert[PATH_MAX];
};
enum imsg_type {
IMSG_NONE,
IMSG_CTL_OK, /* answer to smtpctl requests */
IMSG_CTL_FAIL,
IMSG_CTL_SHUTDOWN,
IMSG_CTL_VERBOSE,
IMSG_CONF_START,
IMSG_CONF_SSL,
IMSG_CONF_SSL_CERT,
IMSG_CONF_SSL_KEY,
IMSG_CONF_LISTENER,
IMSG_CONF_MAP,
IMSG_CONF_MAP_CONTENT,
IMSG_CONF_RULE,
IMSG_CONF_RULE_SOURCE,
IMSG_CONF_CONDITION,
IMSG_CONF_OPTION,
IMSG_CONF_END,
IMSG_CONF_RELOAD,
IMSG_LKA_MAIL,
IMSG_LKA_RCPT,
IMSG_LKA_SECRET,
IMSG_LKA_RULEMATCH,
IMSG_MDA_SESS_NEW,
IMSG_MDA_DONE,
IMSG_MFA_RCPT,
IMSG_MFA_MAIL,
IMSG_QUEUE_CREATE_MESSAGE,
IMSG_QUEUE_SUBMIT_ENVELOPE,
IMSG_QUEUE_COMMIT_ENVELOPES,
IMSG_QUEUE_REMOVE_MESSAGE,
IMSG_QUEUE_COMMIT_MESSAGE,
IMSG_QUEUE_TEMPFAIL,
IMSG_QUEUE_STATS,
IMSG_QUEUE_PAUSE_LOCAL,
IMSG_QUEUE_PAUSE_OUTGOING,
IMSG_QUEUE_RESUME_LOCAL,
IMSG_QUEUE_RESUME_OUTGOING,
IMSG_QUEUE_REMOVE_SUBMISSION,
IMSG_QUEUE_MESSAGE_UPDATE,
IMSG_QUEUE_MESSAGE_FD,
IMSG_QUEUE_MESSAGE_FILE,
IMSG_QUEUE_SCHEDULE,
IMSG_QUEUE_REMOVE,
IMSG_BATCH_CREATE,
IMSG_BATCH_APPEND,
IMSG_BATCH_CLOSE,
IMSG_BATCH_DONE,
IMSG_PARENT_ENQUEUE_OFFLINE,
IMSG_PARENT_FORWARD_OPEN,
IMSG_PARENT_FORK_MDA,
IMSG_PARENT_STATS,
IMSG_PARENT_AUTHENTICATE,
IMSG_PARENT_SEND_CONFIG,
IMSG_SMTP_STATS,
IMSG_STATS,
IMSG_SMTP_ENQUEUE,
IMSG_SMTP_PAUSE,
IMSG_SMTP_RESUME,
IMSG_DNS_A,
IMSG_DNS_A_END,
IMSG_DNS_MX,
IMSG_DNS_PTR
};
enum blockmodes {
BM_NORMAL,
BM_NONBLOCK
};
struct imsgev {
struct imsgbuf ibuf;
void (*handler)(int, short, void *);
struct event ev;
void *data;
struct smtpd *env;
int proc;
short events;
};
struct ctl_conn {
TAILQ_ENTRY(ctl_conn) entry;
u_int8_t flags;
#define CTL_CONN_NOTIFY 0x01
struct imsgev iev;
};
TAILQ_HEAD(ctl_connlist, ctl_conn);
typedef u_int32_t objid_t;
struct ctl_id {
objid_t id;
char name[MAX_NAME_SIZE];
};
enum smtp_proc_type {
PROC_PARENT = 0,
PROC_SMTP,
PROC_MFA,
PROC_LKA,
PROC_QUEUE,
PROC_MDA,
PROC_MTA,
PROC_CONTROL,
PROC_RUNNER,
} smtpd_process;
struct peer {
enum smtp_proc_type id;
void (*cb)(int, short, void *);
};
enum map_type {
T_SINGLE,
T_LIST,
T_HASH
};
enum map_src {
S_NONE,
S_DYN,
S_DNS,
S_PLAIN,
S_DB,
S_EXT
};
enum map_kind {
K_NONE,
K_ALIAS,
K_VIRTUAL,
K_SECRET
};
enum mapel_type {
ME_STRING,
ME_NET,
ME_NETMASK
};
struct mapel {
TAILQ_ENTRY(mapel) me_entry;
union mapel_data {
char med_string[MAX_LINE_SIZE];
struct netaddr med_addr;
} me_key;
union mapel_data me_val;
};
struct map {
TAILQ_ENTRY(map) m_entry;
#define F_USED 0x01
#define F_DYNAMIC 0x02
u_int8_t m_flags;
char m_name[MAX_LINE_SIZE];
objid_t m_id;
enum map_type m_type;
enum mapel_type m_eltype;
enum map_src m_src;
char m_config[MAXPATHLEN];
TAILQ_HEAD(mapel_list, mapel) m_contents;
};
struct map_backend {
enum map_src source;
void *(*open)(char *);
void (*close)(void *);
char *(*get)(void *, char *, size_t *);
int (*put)(void *, char *, char *);
};
struct map_parser {
enum map_kind kind;
void *(*extract)(char *, char *, size_t);
};
enum cond_type {
C_ALL,
C_NET,
C_DOM,
C_VDOM
};
struct cond {
TAILQ_ENTRY(cond) c_entry;
objid_t c_map;
enum cond_type c_type;
};
enum opt_type {
O_RWUSER, /* rewrite user */
O_RWDOMAIN, /* rewrite domain */
};
struct opt {
TAILQ_ENTRY(opt) o_entry;
enum opt_type o_type;
};
enum action_type {
A_INVALID,
A_RELAY,
A_RELAYVIA,
A_MAILDIR,
A_MBOX,
A_FILENAME,
A_EXT
};
#define IS_MAILBOX(x) ((x).rule.r_action == A_MAILDIR || (x).rule.r_action == A_MBOX || (x).rule.r_action == A_FILENAME)
#define IS_RELAY(x) ((x).rule.r_action == A_RELAY || (x).rule.r_action == A_RELAYVIA)
#define IS_EXT(x) ((x).rule.r_action == A_EXT)
struct rule {
TAILQ_ENTRY(rule) r_entry;
char r_tag[MAX_TAG_SIZE];
int r_accept;
struct map *r_sources;
TAILQ_HEAD(condlist, cond) r_conditions;
enum action_type r_action;
union rule_dest {
char path[MAXPATHLEN];
struct relayhost relayhost;
#define MAXCOMMANDLEN 256
char command[MAXCOMMANDLEN];
} r_value;
TAILQ_HEAD(optlist, opt) r_options;
char *r_user;
objid_t r_amap;
};
enum path_flags {
F_PATH_ALIAS = 0x1,
F_PATH_VIRTUAL = 0x2,
F_PATH_EXPANDED = 0x4,
F_PATH_NOFORWARD = 0x8,
F_PATH_FORWARDED = 0x10,
F_PATH_ACCOUNT = 0x20,
F_PATH_AUTHENTICATED = 0x40,
F_PATH_RELAY = 0x80,
};
struct mailaddr {
char user[MAX_LOCALPART_SIZE];
char domain[MAX_DOMAINPART_SIZE];
};
union path_data {
char username[MAXLOGNAME];
char filename[MAXPATHLEN];
char filter[MAXPATHLEN];
struct mailaddr mailaddr;
};
struct path {
TAILQ_ENTRY(path) entry;
struct rule rule;
struct cond *cond;
enum path_flags flags;
u_int8_t forwardcnt;
char user[MAX_LOCALPART_SIZE];
char domain[MAX_DOMAINPART_SIZE];
char pw_name[MAXLOGNAME];
union path_data u;
};
TAILQ_HEAD(deliverylist, path);
enum expand_type {
EXPAND_INVALID,
EXPAND_USERNAME,
EXPAND_FILENAME,
EXPAND_FILTER,
EXPAND_INCLUDE,
EXPAND_ADDRESS
};
enum expand_flags {
F_EXPAND_NONE,
F_EXPAND_DONE
};
struct expandnode {
RB_ENTRY(expandnode) entry;
size_t refcnt;
enum expand_flags flags;
enum expand_type type;
union path_data u;
};
RB_HEAD(expandtree, expandnode);
enum message_type {
T_MDA_MESSAGE = 0x1,
T_MTA_MESSAGE = 0x2,
T_BOUNCE_MESSAGE = 0x4
};
enum message_status {
S_MESSAGE_PERMFAILURE = 0x2,
S_MESSAGE_TEMPFAILURE = 0x4,
S_MESSAGE_REJECTED = 0x8,
S_MESSAGE_ACCEPTED = 0x10,
S_MESSAGE_RETRY = 0x20,
S_MESSAGE_EDNS = 0x40,
S_MESSAGE_ECONNECT = 0x80
};
enum message_flags {
F_MESSAGE_RESOLVED = 0x1,
F_MESSAGE_SCHEDULED = 0x2,
F_MESSAGE_PROCESSING = 0x4,
F_MESSAGE_AUTHENTICATED = 0x8,
F_MESSAGE_ENQUEUED = 0x10,
F_MESSAGE_FORCESCHEDULE = 0x20,
F_MESSAGE_BOUNCE = 0x40
};
struct message {
TAILQ_ENTRY(message) entry;
enum message_type type;
u_int64_t id;
u_int64_t session_id;
u_int64_t batch_id;
char tag[MAX_TAG_SIZE];
char message_id[MAX_ID_SIZE];
char message_uid[MAX_ID_SIZE];
char session_helo[MAXHOSTNAMELEN];
char session_hostname[MAXHOSTNAMELEN];
char session_errorline[MAX_LINE_SIZE];
struct sockaddr_storage session_ss;
struct path session_rcpt;
struct path sender;
struct path recipient;
time_t creation;
time_t lasttry;
u_int8_t retry;
enum message_flags flags;
enum message_status status;
};
enum batch_type {
T_MDA_BATCH = 0x1,
T_MTA_BATCH = 0x2,
T_BOUNCE_BATCH = 0x4
};
struct batch {
SPLAY_ENTRY(batch) b_nodes;
u_int64_t id;
enum batch_type type;
struct rule rule;
struct smtpd *env;
char message_id[MAX_ID_SIZE];
char hostname[MAXHOSTNAMELEN];
TAILQ_HEAD(, message) messages;
};
enum child_type {
CHILD_INVALID,
CHILD_DAEMON,
CHILD_MDA,
CHILD_ENQUEUE_OFFLINE
};
struct child {
SPLAY_ENTRY(child) entry;
pid_t pid;
enum child_type type;
enum smtp_proc_type title;
int mda_out;
u_int32_t mda_id;
};
enum session_state {
S_INVALID = 0,
S_INIT,
S_GREETED,
S_TLS,
S_AUTH_INIT,
S_AUTH_USERNAME,
S_AUTH_PASSWORD,
S_AUTH_FINALIZE,
S_HELO,
S_MAIL_MFA,
S_MAIL_QUEUE,
S_MAIL,
S_RCPT_MFA,
S_RCPT,
S_DATA,
S_DATA_QUEUE,
S_DATACONTENT,
S_DONE,
S_QUIT
};
#define STATE_COUNT 18
struct ssl {
SPLAY_ENTRY(ssl) ssl_nodes;
char ssl_name[PATH_MAX];
char *ssl_cert;
off_t ssl_cert_len;
char *ssl_key;
off_t ssl_key_len;
u_int8_t flags;
};
struct listener {
u_int8_t flags;
int fd;
struct sockaddr_storage ss;
in_port_t port;
struct timeval timeout;
struct event ev;
struct smtpd *env;
char ssl_cert_name[PATH_MAX];
struct ssl *ssl;
void *ssl_ctx;
char tag[MAX_TAG_SIZE];
TAILQ_ENTRY(listener) entry;
};
struct auth {
u_int64_t id;
char user[MAXLOGNAME];
char pass[MAX_LINE_SIZE];
int success;
};
enum session_flags {
F_EHLO = 0x1,
F_QUIT = 0x2,
F_8BITMIME = 0x4,
F_SECURE = 0x8,
F_AUTHENTICATED = 0x10,
F_PEERHASTLS = 0x20,
F_PEERHASAUTH = 0x40,
F_WRITEONLY = 0x80
};
struct session {
SPLAY_ENTRY(session) s_nodes;
u_int64_t s_id;
enum session_flags s_flags;
enum session_state s_state;
int s_fd;
struct sockaddr_storage s_ss;
char s_hostname[MAXHOSTNAMELEN];
struct event s_ev;
struct bufferevent *s_bev;
struct listener *s_l;
struct smtpd *s_env;
void *s_ssl;
u_char *s_buf;
int s_buflen;
struct timeval s_tv;
struct message s_msg;
short s_nresp[STATE_COUNT];
size_t rcptcount;
long s_datalen;
struct auth s_auth;
struct batch *batch;
FILE *datafp;
int mboxfd;
int messagefd;
};
struct smtpd {
char sc_conffile[MAXPATHLEN];
size_t sc_maxsize;
#define SMTPD_OPT_VERBOSE 0x00000001
#define SMTPD_OPT_NOACTION 0x00000002
u_int32_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
u_int32_t sc_flags;
struct timeval sc_qintval;
u_int32_t sc_maxconn;
struct event sc_ev;
int *sc_pipes[PROC_COUNT]
[PROC_COUNT];
struct imsgev *sc_ievs[PROC_COUNT];
int sc_instances[PROC_COUNT];
int sc_instance;
char *sc_title[PROC_COUNT];
struct passwd *sc_pw;
char sc_hostname[MAXHOSTNAMELEN];
TAILQ_HEAD(listenerlist, listener) *sc_listeners;
TAILQ_HEAD(maplist, map) *sc_maps, *sc_maps_reload;
TAILQ_HEAD(rulelist, rule) *sc_rules, *sc_rules_reload;
SPLAY_HEAD(sessiontree, session) sc_sessions;
SPLAY_HEAD(msgtree, message) sc_messages;
SPLAY_HEAD(ssltree, ssl) *sc_ssl;
SPLAY_HEAD(batchtree, batch) batch_queue;
SPLAY_HEAD(childtree, child) children;
SPLAY_HEAD(lkatree, lkasession) lka_sessions;
SPLAY_HEAD(mtatree, mta_session) mta_sessions;
LIST_HEAD(mdalist, mda_session) mda_sessions;
struct stats *stats;
};
struct s_parent {
time_t start;
};
struct s_queue {
size_t inserts_local;
size_t inserts_remote;
};
struct s_runner {
size_t active;
size_t bounces_active;
size_t bounces;
};
struct s_session {
size_t sessions;
size_t sessions_active;
size_t smtps;
size_t smtps_active;
size_t starttls;
size_t starttls_active;
size_t read_error;
size_t read_timeout;
size_t read_eof;
size_t write_error;
size_t write_timeout;
size_t write_eof;
size_t toofast;
size_t tempfail;
size_t linetoolong;
size_t delays;
};
struct s_mda {
size_t sessions;
size_t sessions_active;
};
struct s_control {
size_t sessions;
size_t sessions_active;
};
struct stats {
struct s_parent parent;
struct s_queue queue;
struct s_runner runner;
struct s_session mta;
struct s_mda mda;
struct s_session smtp;
struct s_control control;
};
struct sched {
int fd;
char mid[MAX_ID_SIZE];
int ret;
};
struct remove {
int fd;
char mid[MAX_ID_SIZE];
int ret;
};
struct reload {
int fd;
int ret;
};
struct submit_status {
u_int64_t id;
int code;
union submit_path {
struct path path;
char msgid[MAX_ID_SIZE];
char errormsg[MAX_LINE_SIZE];
} u;
enum message_flags flags;
struct sockaddr_storage ss;
struct message msg;
};
struct forward_req {
u_int64_t id;
u_int8_t status;
char pw_name[MAXLOGNAME];
};
struct dns {
u_int64_t id;
char host[MAXHOSTNAMELEN];
int port;
int error;
struct sockaddr_storage ss;
struct smtpd *env;
struct dns *next;
};
struct secret {
u_int64_t id;
char host[MAXHOSTNAMELEN];
char secret[MAX_LINE_SIZE];
};
struct mda_session {
LIST_ENTRY(mda_session) entry;
struct message msg;
struct msgbuf w;
struct event ev;
u_int32_t id;
FILE *datafp;
};
struct deliver {
char to[PATH_MAX];
char user[MAXLOGNAME];
short mode;
};
struct rulematch {
u_int64_t id;
struct submit_status ss;
};
enum lkasession_flags {
F_ERROR = 0x1
};
struct lkasession {
SPLAY_ENTRY(lkasession) nodes;
u_int64_t id;
struct path path;
struct deliverylist deliverylist;
struct expandtree expandtree;
u_int8_t iterations;
u_int32_t pending;
enum lkasession_flags flags;
struct message message;
struct submit_status ss;
};
enum mta_state {
MTA_INVALID_STATE,
MTA_INIT,
MTA_SECRET,
MTA_DATA,
MTA_MX,
MTA_CONNECT,
MTA_PTR,
MTA_PROTOCOL,
MTA_DONE
};
/* mta session flags */
#define MTA_FORCE_ANYSSL 0x1
#define MTA_FORCE_SMTPS 0x2
#define MTA_ALLOW_PLAIN 0x4
#define MTA_USE_AUTH 0x8
struct mta_relay {
TAILQ_ENTRY(mta_relay) entry;
struct sockaddr_storage sa;
char fqdn[MAXHOSTNAMELEN];
int used;
};
struct mta_session {
SPLAY_ENTRY(mta_session) entry;
u_int64_t id;
struct smtpd *env;
enum mta_state state;
char *host;
int port;
int flags;
TAILQ_HEAD(,message) recipients;
TAILQ_HEAD(,mta_relay) relays;
char *secret;
int fd;
int datafd;
struct event ev;
char *cert;
void *pcb;
};
/* maps return structures */
struct map_secret {
char username[MAX_LINE_SIZE];
char password[MAX_LINE_SIZE];
};
struct map_alias {
size_t nbnodes;
struct expandtree expandtree;
};
struct map_virtual {
size_t nbnodes;
struct expandtree expandtree;
};
extern void (*imsg_callback)(struct smtpd *, struct imsgev *, struct imsg *);
/* aliases.c */
int aliases_exist(struct smtpd *, objid_t, char *);
int aliases_get(struct smtpd *, objid_t, struct expandtree *, char *);
int aliases_vdomain_exists(struct smtpd *, objid_t, char *);
int aliases_virtual_exist(struct smtpd *, objid_t, struct path *);
int aliases_virtual_get(struct smtpd *, objid_t, struct expandtree *, struct path *);
int alias_parse(struct expandnode *, char *);
/* authenticate.c */
int authenticate_user(char *, char *);
/* bounce.c */
int bounce_session(struct smtpd *, int, struct message *);
int bounce_session_switch(struct smtpd *, FILE *, enum session_state *, char *,
struct message *);
/* log.c */
void log_init(int);
void log_verbose(int);
void log_warn(const char *, ...)
__attribute__ ((format (printf, 1, 2)));
void log_warnx(const char *, ...)
__attribute__ ((format (printf, 1, 2)));
void log_info(const char *, ...)
__attribute__ ((format (printf, 1, 2)));
void log_debug(const char *, ...)
__attribute__ ((format (printf, 1, 2)));
__dead void fatal(const char *);
__dead void fatalx(const char *);
/* dns.c */
void dns_query_a(struct smtpd *, char *, int, u_int64_t);
void dns_query_mx(struct smtpd *, char *, int, u_int64_t);
void dns_query_ptr(struct smtpd *, struct sockaddr_storage *,
u_int64_t);
void dns_async(struct smtpd *, struct imsgev *, int,
struct dns *);
/* expand.c */
int expand_cmp(struct expandnode *, struct expandnode *);
void expandtree_increment_node(struct expandtree *, struct expandnode *);
void expandtree_decrement_node(struct expandtree *, struct expandnode *);
void expandtree_remove_node(struct expandtree *, struct expandnode *);
struct expandnode *expandtree_lookup(struct expandtree *, struct expandnode *);
void expandtree_free_nodes(struct expandtree *);
RB_PROTOTYPE(expandtree, expandnode, nodes, expand_cmp);
/* forward.c */
int forwards_get(int, struct expandtree *);
/* smtpd.c */
int child_cmp(struct child *, struct child *);
SPLAY_PROTOTYPE(childtree, child, entry, child_cmp);
void imsg_event_add(struct imsgev *);
int imsg_compose_event(struct imsgev *, u_int16_t, u_int32_t, pid_t,
int, void *, u_int16_t);
void imsg_dispatch(int, short, void *);
/* lka.c */
pid_t lka(struct smtpd *);
int lkasession_cmp(struct lkasession *, struct lkasession *);
SPLAY_PROTOTYPE(lkatree, lkasession, nodes, lkasession_cmp);
/* mfa.c */
pid_t mfa(struct smtpd *);
int msg_cmp(struct message *, struct message *);
/* queue.c */
pid_t queue(struct smtpd *);
int queue_load_envelope(struct message *, char *);
int queue_update_envelope(struct message *);
int queue_remove_envelope(struct message *);
void queue_submit_envelope(struct smtpd *, struct message *);
void queue_commit_envelopes(struct smtpd *, struct message*);
int batch_cmp(struct batch *, struct batch *);
struct batch *batch_by_id(struct smtpd *, u_int64_t);
u_int16_t queue_hash(char *);
/* queue_shared.c */
int queue_create_layout_message(char *, char *);
void queue_delete_layout_message(char *, char *);
int queue_record_layout_envelope(char *, struct message *);
int queue_remove_layout_envelope(char *, struct message *);
int queue_commit_layout_message(char *, struct message *);
int queue_open_layout_messagefile(char *, struct message *);
int enqueue_create_layout(char *);
void enqueue_delete_message(char *);
int enqueue_record_envelope(struct message *);
int enqueue_remove_envelope(struct message *);
int enqueue_commit_message(struct message *);
int enqueue_open_messagefile(struct message *);
int bounce_create_layout(char *, struct message *);
void bounce_delete_message(char *);
int bounce_record_envelope(struct message *);
int bounce_remove_envelope(struct message *);
int bounce_commit_message(struct message *);
int bounce_record_message(struct message *);
int queue_create_incoming_layout(char *);
void queue_delete_incoming_message(char *);
int queue_record_incoming_envelope(struct message *);
int queue_remove_incoming_envelope(struct message *);
int queue_commit_incoming_message(struct message *);
int queue_open_incoming_message_file(struct message *);
int queue_open_message_file(char *msgid);
void queue_message_update(struct message *);
void queue_delete_message(char *);
struct qwalk *qwalk_new(char *);
int qwalk(struct qwalk *, char *);
void qwalk_close(struct qwalk *);
void show_queue(char *, int);
u_int16_t queue_hash(char *);
/* map.c */
void *map_lookup(struct smtpd *, objid_t, char *, enum map_kind);
/* mda.c */
pid_t mda(struct smtpd *);
/* mta.c */
pid_t mta(struct smtpd *);
int mta_session_cmp(struct mta_session *, struct mta_session *);
SPLAY_PROTOTYPE(mtatree, mta_session, entry, mta_session_cmp);
/* control.c */
pid_t control(struct smtpd *);
void session_socket_blockmode(int, enum blockmodes);
void session_socket_no_linger(int);
int session_socket_error(int);
/* enqueue.c */
int enqueue(int, char **);
int enqueue_offline(int, char **);
/* runner.c */
pid_t runner(struct smtpd *);
void message_reset_flags(struct message *);
SPLAY_PROTOTYPE(batchtree, batch, b_nodes, batch_cmp);
/* smtp.c */
pid_t smtp(struct smtpd *);
void smtp_resume(struct smtpd *);
/* smtp_session.c */
void session_init(struct listener *, struct session *);
int session_cmp(struct session *, struct session *);
void session_pickup(struct session *, struct submit_status *);
void session_destroy(struct session *);
void session_respond(struct session *, char *, ...)
__attribute__ ((format (printf, 2, 3)));
void session_bufferevent_new(struct session *);
SPLAY_PROTOTYPE(sessiontree, session, s_nodes, session_cmp);
/* config.c */
#define PURGE_LISTENERS 0x01
#define PURGE_MAPS 0x02
#define PURGE_RULES 0x04
#define PURGE_SSL 0x08
#define PURGE_EVERYTHING 0xff
void purge_config(struct smtpd *, u_int8_t);
void unconfigure(struct smtpd *);
void configure(struct smtpd *);
void init_pipes(struct smtpd *);
void config_pipes(struct smtpd *, struct peer *, u_int);
void config_peers(struct smtpd *, struct peer *, u_int);
/* parse.y */
int parse_config(struct smtpd *, const char *, int);
int cmdline_symset(char *);
/* ssl.c */
void ssl_init(void);
void ssl_transaction(struct session *);
void ssl_session_init(struct session *);
void ssl_session_destroy(struct session *);
int ssl_load_certfile(struct smtpd *, const char *, u_int8_t);
void ssl_setup(struct smtpd *, struct listener *);
int ssl_cmp(struct ssl *, struct ssl *);
SPLAY_PROTOTYPE(ssltree, ssl, ssl_nodes, ssl_cmp);
/* ssl_privsep.c */
int ssl_ctx_use_private_key(void *, char *, off_t);
int ssl_ctx_use_certificate_chain(void *, char *, off_t);
/* map.c */
struct map *map_find(struct smtpd *, objid_t);
struct map *map_findbyname(struct smtpd *, const char *);
/* util.c */
typedef struct arglist arglist;
struct arglist {
char **list;
u_int num;
u_int nalloc;
};
void addargs(arglist *, char *, ...)
__attribute__((format(printf, 2, 3)));
int bsnprintf(char *, size_t, const char *, ...)
__attribute__ ((format (printf, 3, 4)));
int safe_fclose(FILE *);
int hostname_match(char *, char *);
int recipient_to_path(struct path *, char *);
int valid_localpart(char *);
int valid_domainpart(char *);
char *ss_to_text(struct sockaddr_storage *);
int valid_message_id(char *);
int valid_message_uid(char *);
char *time_to_text(time_t);
int secure_file(int, char *, struct passwd *, int);
void lowercase(char *, char *, size_t);
void message_set_errormsg(struct message *, char *, ...);
char *message_get_errormsg(struct message *);
void sa_set_port(struct sockaddr *, int);
struct path *path_dup(struct path *);
u_int64_t generate_uid(void);
void fdlimit(double);
int availdesc(void);
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