[people/ms/dma.git] / dma.h

/*
 * Copyright (c) 2008 The DragonFly Project.  All rights reserved.
 *
 * This code is derived from software contributed to The DragonFly Project
 * by Simon 'corecode' Schubert <corecode@fs.ei.tum.de> and
 * Matthias Schmidt <matthias@dragonflybsd.org>.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name of The DragonFly Project nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific, prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef DMA_H
#define DMA_H

#include <sys/types.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <arpa/nameser.h>
#include <arpa/inet.h>
#include <openssl/ssl.h>
#include <netdb.h>

#define VERSION	"DragonFly Mail Agent " DMA_VERSION

#define BUF_SIZE	2048
#define ERRMSG_SIZE	200
#define USERNAME_SIZE	50
#define MIN_RETRY	300		/* 5 minutes */
#define MAX_RETRY	(3*60*60)	/* retry at least every 3 hours */
#define MAX_TIMEOUT	(5*24*60*60)	/* give up after 5 days */
#ifndef PATH_MAX
#define PATH_MAX	1024		/* Max path len */
#endif
#define	SMTP_PORT	25		/* Default SMTP port */
#define CON_TIMEOUT	(5*60)		/* Connection timeout per RFC5321 */

#define STARTTLS	0x002		/* StartTLS support */
#define SECURETRANS	0x004		/* SSL/TLS in general */
#define NOSSL		0x008		/* Do not use SSL */
#define DEFER		0x010		/* Defer mails */
#define INSECURE	0x020		/* Allow plain login w/o encryption */
#define FULLBOUNCE	0x040		/* Bounce the full message */
#define TLS_OPP		0x080		/* Opportunistic STARTTLS */

#ifndef CONF_PATH
#define CONF_PATH	"/etc/dma/dma.conf"	/* Default path to dma.conf */
#endif

#ifndef LIBEXEC_PATH
#error Please define LIBEXEC_PATH
#endif

#define DMA_ROOT_USER	"mail"
#define DMA_GROUP	"mail"


struct stritem {
	SLIST_ENTRY(stritem) next;
	char *str;
};
SLIST_HEAD(strlist, stritem);

struct alias {
	LIST_ENTRY(alias) next;
	char *alias;
	struct strlist dests;
};
LIST_HEAD(aliases, alias);

struct qitem {
	LIST_ENTRY(qitem) next;
	const char *sender;
	char *addr;
	char *queuefn;
	char *mailfn;
	char *queueid;
	FILE *queuef;
	FILE *mailf;
	int remote;
};
LIST_HEAD(queueh, qitem);

struct queue {
	struct queueh queue;
	char *id;
	FILE *mailf;
	char *tmpf;
	const char *sender;
};

struct config {
	const char *smarthost;
	int port;
	const char *aliases;
	const char *spooldir;
	const char *authpath;
	const char *certfile;
	int features;
	const char *mailname;

	/* XXX does not belong into config */
	SSL *ssl;
};


struct authuser {
	SLIST_ENTRY(authuser) next;
	char *login;
	char *password;
	char *host;
};
SLIST_HEAD(authusers, authuser);


struct mx_hostentry {
	char		host[MAXDNAME];
	char		addr[INET6_ADDRSTRLEN];
	int		pref;
	struct addrinfo	ai;
	struct sockaddr_storage	sa;
};


/* global variables */
extern struct aliases aliases;
extern struct config config;
extern struct strlist tmpfs;
extern struct authusers authusers;
extern char username[USERNAME_SIZE];
extern uid_t useruid;
extern const char *logident_base;

extern char neterr[ERRMSG_SIZE];
extern char errmsg[ERRMSG_SIZE];

/* aliases_parse.y */
int yyparse(void);
extern FILE *yyin;

/* conf.c */
void trim_line(char *);
void parse_conf(const char *);
void parse_authfile(const char *);

/* crypto.c */
void hmac_md5(unsigned char *, int, unsigned char *, int, unsigned char *);
int smtp_auth_md5(int, char *, char *);
int smtp_init_crypto(int, int);

/* dns.c */
int dns_get_mx_list(const char *, int, struct mx_hostentry **, int);

/* net.c */
char *ssl_errstr(void);
int read_remote(int, int, char *);
ssize_t send_remote_command(int, const char*, ...);
int deliver_remote(struct qitem *);

/* base64.c */
int base64_encode(const void *, int, char **);
int base64_decode(const char *, void *);

/* dma.c */
int add_recp(struct queue *, const char *, int);
void run_queue(struct queue *);

/* spool.c */
int newspoolf(struct queue *);
int linkspool(struct queue *);
int load_queue(struct queue *);
void delqueue(struct qitem *);
int acquirespool(struct qitem *);
void dropspool(struct queue *, struct qitem *);

/* local.c */
int deliver_local(struct qitem *);

/* mail.c */
void bounce(struct qitem *, const char *);
int readmail(struct queue *, int, int);

/* util.c */
const char *hostname(void);
void setlogident(const char *, ...);
void errlog(int, const char *, ...);
void errlogx(int, const char *, ...);
void set_username(void);
void deltmp(void);
int do_timeout(int, int);
int open_locked(const char *, int, ...);
char *rfc822date(void);
int strprefixcmp(const char *, const char *);
void init_random(void);

#endif
Commit	Line	Data
	1	/*
	2	* Copyright (c) 2008 The DragonFly Project. All rights reserved.
	3	*
	4	* This code is derived from software contributed to The DragonFly Project
	5	* by Simon 'corecode' Schubert <corecode@fs.ei.tum.de> and
	6	* Matthias Schmidt <matthias@dragonflybsd.org>.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	*
	12	* 1. Redistributions of source code must retain the above copyright
	13	* notice, this list of conditions and the following disclaimer.
	14	* 2. Redistributions in binary form must reproduce the above copyright
	15	* notice, this list of conditions and the following disclaimer in
	16	* the documentation and/or other materials provided with the
	17	* distribution.
	18	* 3. Neither the name of The DragonFly Project nor the names of its
	19	* contributors may be used to endorse or promote products derived
	20	* from this software without specific, prior written permission.
	21	*
	22	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	23	* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	24	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
	25	* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	26	* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
	27	* INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
	28	* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	29	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
	30	* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	31	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
	32	* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	33	* SUCH DAMAGE.
	34	*/
	35
	36	#ifndef DMA_H
	37	#define DMA_H
	38
	39	#include <sys/types.h>
	40	#include <sys/queue.h>
	41	#include <sys/socket.h>
	42	#include <arpa/nameser.h>
	43	#include <arpa/inet.h>
	44	#include <openssl/ssl.h>
	45	#include <netdb.h>
	46
	47	#define VERSION "DragonFly Mail Agent " DMA_VERSION
	48
	49	#define BUF_SIZE 2048
	50	#define ERRMSG_SIZE 200
	51	#define USERNAME_SIZE 50
	52	#define MIN_RETRY 300 /* 5 minutes */
	53	#define MAX_RETRY (36060) /* retry at least every 3 hours */
	54	#define MAX_TIMEOUT (5246060) / give up after 5 days */
	55	#ifndef PATH_MAX
	56	#define PATH_MAX 1024 /* Max path len */
	57	#endif
	58	#define SMTP_PORT 25 /* Default SMTP port */
	59	#define CON_TIMEOUT (560) / Connection timeout per RFC5321 */
	60
	61	#define STARTTLS 0x002 /* StartTLS support */
	62	#define SECURETRANS 0x004 /* SSL/TLS in general */
	63	#define NOSSL 0x008 /* Do not use SSL */
	64	#define DEFER 0x010 /* Defer mails */
	65	#define INSECURE 0x020 /* Allow plain login w/o encryption */
	66	#define FULLBOUNCE 0x040 /* Bounce the full message */
	67	#define TLS_OPP 0x080 /* Opportunistic STARTTLS */
	68
	69	#ifndef CONF_PATH
	70	#define CONF_PATH "/etc/dma/dma.conf" /* Default path to dma.conf */
	71	#endif
	72
	73	#ifndef LIBEXEC_PATH
	74	#error Please define LIBEXEC_PATH
	75	#endif
	76
	77	#define DMA_ROOT_USER "mail"
	78	#define DMA_GROUP "mail"
	79
	80
	81	struct stritem {
	82	SLIST_ENTRY(stritem) next;
	83	char *str;
	84	};
	85	SLIST_HEAD(strlist, stritem);
	86
	87	struct alias {
	88	LIST_ENTRY(alias) next;
	89	char *alias;
	90	struct strlist dests;
	91	};
	92	LIST_HEAD(aliases, alias);
	93
	94	struct qitem {
	95	LIST_ENTRY(qitem) next;
	96	const char *sender;
	97	char *addr;
	98	char *queuefn;
	99	char *mailfn;
	100	char *queueid;
	101	FILE *queuef;
	102	FILE *mailf;
	103	int remote;
	104	};
	105	LIST_HEAD(queueh, qitem);
	106
	107	struct queue {
	108	struct queueh queue;
	109	char *id;
	110	FILE *mailf;
	111	char *tmpf;
	112	const char *sender;
	113	};
	114
	115	struct config {
	116	const char *smarthost;
	117	int port;
	118	const char *aliases;
	119	const char *spooldir;
	120	const char *authpath;
	121	const char *certfile;
	122	int features;
	123	const char *mailname;
	124
	125	/* XXX does not belong into config */
	126	SSL *ssl;
	127	};
	128
	129
	130	struct authuser {
	131	SLIST_ENTRY(authuser) next;
	132	char *login;
	133	char *password;
	134	char *host;
	135	};
	136	SLIST_HEAD(authusers, authuser);
	137
	138
	139	struct mx_hostentry {
	140	char host[MAXDNAME];
	141	char addr[INET6_ADDRSTRLEN];
	142	int pref;
	143	struct addrinfo ai;
	144	struct sockaddr_storage sa;
	145	};
	146
	147
	148	/* global variables */
	149	extern struct aliases aliases;
	150	extern struct config config;
	151	extern struct strlist tmpfs;
	152	extern struct authusers authusers;
	153	extern char username[USERNAME_SIZE];
	154	extern uid_t useruid;
	155	extern const char *logident_base;
	156
	157	extern char neterr[ERRMSG_SIZE];
	158	extern char errmsg[ERRMSG_SIZE];
	159
	160	/* aliases_parse.y */
	161	int yyparse(void);
	162	extern FILE *yyin;
	163
	164	/* conf.c */
	165	void trim_line(char *);
	166	void parse_conf(const char *);
	167	void parse_authfile(const char *);
	168
	169	/* crypto.c */
	170	void hmac_md5(unsigned char , int, unsigned char , int, unsigned char *);
	171	int smtp_auth_md5(int, char , char );
	172	int smtp_init_crypto(int, int);
	173
	174	/* dns.c */
	175	int dns_get_mx_list(const char , int, struct mx_hostentry *, int);
	176
	177	/* net.c */
	178	char *ssl_errstr(void);
	179	int read_remote(int, int, char *);
	180	ssize_t send_remote_command(int, const char*, ...);
	181	int deliver_remote(struct qitem *);
	182
	183	/* base64.c */
	184	int base64_encode(const void , int, char *);
	185	int base64_decode(const char , void );
	186
	187	/* dma.c */
	188	int add_recp(struct queue , const char , int);
	189	void run_queue(struct queue *);
	190
	191	/* spool.c */
	192	int newspoolf(struct queue *);
	193	int linkspool(struct queue *);
	194	int load_queue(struct queue *);
	195	void delqueue(struct qitem *);
	196	int acquirespool(struct qitem *);
	197	void dropspool(struct queue , struct qitem );
	198
	199	/* local.c */
	200	int deliver_local(struct qitem *);
	201
	202	/* mail.c */
	203	void bounce(struct qitem , const char );
	204	int readmail(struct queue *, int, int);
	205
	206	/* util.c */
	207	const char *hostname(void);
	208	void setlogident(const char *, ...);
	209	void errlog(int, const char *, ...);
	210	void errlogx(int, const char *, ...);
	211	void set_username(void);
	212	void deltmp(void);
	213	int do_timeout(int, int);
	214	int open_locked(const char *, int, ...);
	215	char *rfc822date(void);
	216	int strprefixcmp(const char , const char );
	217	void init_random(void);
	218
	219	#endif