--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/masqmail.h	Fri Sep 26 17:05:23 2008 +0200
@@ -0,0 +1,656 @@
+/*  MasqMail
+    Copyright (C) 1999-2001 Oliver Kurth
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+#include <config.h>
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <pwd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <time.h>
+#include <sys/time.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <syslog.h>
+#include <signal.h>
+#include <fcntl.h>
+
+#include <glib.h>
+
+#ifdef ENABLE_IDENT
+#include "libident/ident.h"
+#endif
+
+#include "lookup.h"
+
+typedef
+struct _interface
+{
+  gchar *address;
+  gint port;
+} interface;
+
+#define ADDR_FLAG_DELIVERED 0x01
+#define ADDR_FLAG_DEFERED 0x02
+#define ADDR_FLAG_FAILED 0x04
+#define ADDR_FLAG_LAST_ROUTE 0x40
+#define ADDR_FLAG_NOEXPAND 0x80
+
+typedef struct _address
+{
+  gchar *address;
+  gchar *local_part;
+  gchar *domain;
+  gint flags;
+  GList *children;
+  struct _address *parent;
+} address;
+
+#define addr_mark_delivered(addr) { addr->flags |= ADDR_FLAG_DELIVERED; }
+#define addr_unmark_delivered(addr) { addr->flags &= ~ADDR_FLAG_DELIVERED; }
+#define addr_is_delivered(addr) ((addr->flags & ADDR_FLAG_DELIVERED) != 0 )
+
+#define addr_mark_defered(addr) { addr->flags |= ADDR_FLAG_DEFERED; }
+#define addr_unmark_defered(addr) { addr->flags &= ~ADDR_FLAG_DEFERED; }
+#define addr_is_defered(addr) ((addr->flags & ADDR_FLAG_DEFERED) != 0 )
+
+#define addr_mark_failed(addr) { addr->flags |= ADDR_FLAG_FAILED; }
+#define addr_unmark_failed(addr) { addr->flags &= ~ADDR_FLAG_FAILED; }
+#define addr_is_failed(addr) ((addr->flags & ADDR_FLAG_FAILED) != 0 )
+
+typedef
+struct _connect_route
+{
+  gchar *name;
+  gchar *filename;
+
+  gchar *protocol;
+
+  gboolean is_local_net;
+  gboolean last_route;
+
+  GList *allowed_return_paths;
+  GList *not_allowed_return_paths;
+  GList *allowed_mail_locals;
+  GList *not_allowed_mail_locals;
+  GList *allowed_rcpt_domains;
+  GList *not_allowed_rcpt_domains;
+
+  interface *mail_host;
+  gchar *wrapper;
+  gboolean connect_error_fail;
+
+  gchar *helo_name;
+  gboolean do_correct_helo;
+  gboolean do_pipelining;
+
+  gchar *set_h_from_domain;
+  gchar *set_h_reply_to_domain;
+  gchar *set_return_path_domain;
+
+  GList *map_h_from_addresses;
+  GList *map_h_reply_to_addresses;
+  GList *map_h_mail_followup_to_addresses;
+  GList *map_return_path_addresses;
+
+  gboolean expand_h_sender_domain;
+  gboolean expand_h_sender_address;
+
+  GList *resolve_list;
+
+  gchar *auth_name;
+  gchar *auth_login;
+  gchar *auth_secret;
+
+  gchar *pop3_login;
+
+  gchar *pipe;
+  
+  gboolean pipe_fromline;
+  gboolean pipe_fromhack;
+} connect_route;
+
+typedef struct _get_conf
+{
+  gchar *protocol;
+  gchar *server_name;
+  guint server_port;
+  gchar *wrapper;
+  gchar *login_user;
+  gchar *login_pass;
+  address *address;
+  address *return_path;
+  gboolean do_keep;
+  gboolean do_uidl;
+  gboolean do_uidl_dele;
+  gint max_size;
+  gboolean max_size_delete;
+  gint max_count;
+
+  GList *resolve_list;
+
+} get_conf;
+
+typedef
+struct _masqmail_conf
+{
+  gint mail_uid;
+  gint mail_gid;
+
+  gint orig_uid;
+  gint orig_gid;
+
+  gboolean run_as_user;
+
+  gchar *mail_dir;
+  gchar *lock_dir;
+  gchar *spool_dir;
+  gchar *log_dir;
+
+  gint debug_level;
+  gboolean use_syslog;
+  guint log_max_pri;
+
+  gchar *host_name;
+  GList *local_hosts;
+  GList *local_addresses;
+  GList *not_local_addresses;
+  GList *local_nets;
+  GList *listen_addresses;
+
+  guint remote_port;
+
+  gboolean do_save_envelope_to;
+
+  gboolean defer_all;
+  gboolean do_relay;
+
+  GList *ident_trusted_nets;
+
+  gboolean do_queue;
+
+  gboolean do_verbose;
+
+  gchar *mbox_default;
+  GList *mbox_users;
+  GList *mda_users;
+  GList *maildir_users;
+
+  gchar *mda;
+  gboolean mda_fromline;
+  gboolean mda_fromhack;
+
+  gboolean pipe_fromline;
+  gboolean pipe_fromhack;
+
+  gchar *alias_file;
+  int (*alias_local_cmp)(const char *, const char *);
+
+  GList *local_net_routes;
+  GList *connect_routes; /* list of pairs which point to lists */
+
+  gchar *online_detect;
+  gchar *online_file;
+  gchar *online_pipe;
+  interface *mserver_iface;
+
+  GList *get_names;
+  GList *online_gets; /* list of pairs which point to lists */
+
+  gchar *errmsg_file;
+  gchar *warnmsg_file;
+  GList *warn_intervals;
+  gint max_defer_time;
+
+  gchar *log_user;
+} masqmail_conf;
+
+extern masqmail_conf conf;
+
+typedef
+struct _table_pair
+{
+  gchar *key;
+  gpointer *value;
+} table_pair;
+
+
+typedef
+enum _prot_id
+{
+  PROT_LOCAL = 0,
+  PROT_BSMTP,
+  PROT_SMTP,
+  PROT_ESMTP,
+  PROT_POP3,
+  PROT_APOP,
+  PROT_NUM
+}prot_id;
+
+extern gchar *prot_names[];
+
+typedef
+enum _header_id
+{
+  HEAD_FROM = 0,
+  HEAD_SENDER,
+  HEAD_TO,
+  HEAD_CC,
+  HEAD_BCC,
+  HEAD_DATE,
+  HEAD_MESSAGE_ID,
+  HEAD_REPLY_TO,
+  HEAD_SUBJECT,
+  HEAD_RETURN_PATH,
+  HEAD_ENVELOPE_TO,
+  HEAD_RECEIVED,
+  HEAD_NUM_IDS,
+  HEAD_STATUS,
+  HEAD_UNKNOWN = HEAD_NUM_IDS,
+  HEAD_NONE = -1,
+}header_id;
+
+typedef
+struct _header_name
+{
+  gchar *header;
+  header_id id;
+}header_name;
+
+typedef
+struct _header
+{
+  header_id id;
+  gchar *header;
+  gchar *value;
+}header;
+
+
+typedef
+struct _message
+{
+  gchar *uid;
+
+  gchar *received_host;
+  prot_id received_prot;
+  gchar *ident;
+  gint transfer_id; /* for multiple messages per transfer */
+
+  address *return_path;
+  GList *rcpt_list;
+  GList *non_rcpt_list;
+
+  GList *hdr_list;
+  GList *data_list;
+
+  gint data_size;
+  time_t received_time;
+  time_t warned_time;
+
+  gchar *full_sender_name;
+}message;
+
+typedef
+struct _msg_out
+{
+  message *msg;
+  
+  address *return_path;
+  GList *rcpt_list;
+
+  GList *hdr_list;
+  GList *xtra_hdr_list;
+}msg_out;
+
+typedef
+struct _msgout_perhost
+{
+  gchar *host;
+  GList *msgout_list;
+} msgout_perhost;
+
+/* flags for accept() */
+/*#define ACC_LOCAL      0x01 (we better use received_host == NULL) */
+#define ACC_HEAD_FROM_RCPT 0x01 /* create To: Header from rcpt_list (cmd line) */
+#define ACC_DEL_RCPTS      0x02 /* -t option, delete rcpts */
+#define ACC_DEL_BCC        0x04 /* -t option, delete Bcc header */
+#define ACC_RCPT_FROM_HEAD 0x08 /* -t option, get rcpts from headers */
+#define ACC_NODOT_TERM     0x10 /* a dot on a line itself does not end
+				   the message (-oi option) */
+#define ACC_NO_RECVD_HDR   0x20 /* do not create a Received: header */
+#define ACC_MAIL_FROM_HEAD 0x40 /* get return path from header */
+#define ACC_NODOT_RELAX    0x80 /* do not be picky if message ist not terminated by a dot on a line */
+#define ACC_SAVE_ENVELOPE_TO 0x0100 /* save an existent Envelope-to header as X-Orig-Envelope-to */
+
+#define DLVR_LOCAL 0x01
+#define DLVR_LAN 0x02
+#define DLVR_ONLINE 0x04
+#define DLVR_ALL (DLVR_LOCAL|DLVR_LAN|DLVR_ONLINE)
+
+/* transport flags */
+#define MSGSTR_FROMLINE 0x01
+#define MSGSTR_FROMHACK 0x02
+
+typedef
+enum _accept_error
+{
+  AERR_OK = 0,
+  AERR_TIMEOUT,
+  AERR_EOF,
+  AERR_OVERFLOW,
+  AERR_SYNTAX,
+  AERR_NOSPOOL,
+  AERR_NORCPT,
+  AERR_UNKNOWN
+}accept_error;
+
+#define BUF_LEN 1024
+#define MAX_ADDRESS 256
+#define MAX_DATALINE 4096
+
+typedef
+enum _smtp_cmd_id
+{
+  SMTP_HELO = 0,
+  SMTP_EHLO,
+  SMTP_MAIL_FROM,
+  SMTP_RCPT_TO,
+  SMTP_DATA,
+  SMTP_QUIT,
+  SMTP_RSET,
+  SMTP_NOOP,
+  SMTP_HELP,
+  SMTP_NUM_IDS,
+  SMTP_EOF = -1,
+  SMTP_ERROR = -2,
+} smtp_cmd_id;
+
+typedef
+struct _smtp_cmd
+{
+  smtp_cmd_id id;
+  gchar *cmd;
+} smtp_cmd;
+
+typedef
+struct _smtp_connection
+{
+  gchar *remote_host;
+
+  prot_id prot;
+  gint next_id;
+  
+  gboolean helo_seen;
+  gboolean from_seen;
+  gboolean rcpt_seen;
+
+  message *msg;
+}smtp_connection;
+
+/* alias.c*/
+gboolean addr_is_local(address *addr);
+GList *alias_expand(GList *alias_table, GList *rcpt_list, GList *non_rcpt_list);
+
+/* child.c */
+int child(const char *command);
+
+/* conf.c */
+void init_conf();
+gboolean read_conf(gchar *filename);
+connect_route *read_route(gchar *filename, gboolean is_local_net);
+GList *read_route_list(GList *rf_list, gboolean is_local_net);
+void destroy_route(connect_route *r);
+void destroy_route_list(GList *list);
+get_conf *read_get_conf(gchar *filename);
+void destroy_get_conf(get_conf *gc);
+connect_route *create_local_route();
+
+/* expand.c */
+GList *var_table_rcpt(GList *var_table, address *rcpt);
+GList *var_table_msg(GList *var_table, message *msg);
+GList *var_table_conf(GList *var_table);
+gint expand(GList *var_list, gchar *format, gchar *result, gint result_len);
+
+/* message.c */
+message *create_message(void);
+void destroy_message(message *msg);
+void destroy_msg_list(GList *msg_list);
+void msg_free_data(message *msg);
+gint msg_calc_size(message *msg, gboolean is_smtp);
+
+msg_out *create_msg_out(message *msg);
+msg_out *clone_msg_out(msg_out *msgout_orig);
+GList *create_msg_out_list(GList *msg_list);
+void destroy_msg_out(msg_out *msgout);
+void destroy_msg_out_list(GList *msgout_list);
+
+/* address.c */
+address *create_address(gchar *path, gboolean is_rfc821);
+address *create_address_qualified(gchar *path, gboolean is_rfc821,
+				  gchar *domain);
+address *create_address_pipe(gchar *path);
+void destroy_address(address *addr);
+address *copy_modify_address(const address *orig, gchar *l_part, gchar *dom);
+#define copy_address(addr) copy_modify_address(addr, NULL, NULL)
+gboolean addr_isequal(address *addr1, address *addr2);
+gboolean addr_isequal_parent(address *addr1, address *addr2);
+address *addr_find_ancestor(address *addr);
+gboolean addr_is_delivered_children(address *addr);
+gboolean addr_is_finished_children(address *addr);
+gchar *addr_string(address *addr);
+gint addr_match(address *addr1, address *addr2);
+
+/* accept.c */
+accept_error accept_message(FILE *in, message *msg,
+			    guint flags);
+accept_error accept_message_prepare(message *msg, guint flags);
+
+/* header.c */
+gchar *rec_timestamp();
+GList *find_header(GList *hdr_list, header_id id, gchar *hdr_str);
+void header_unfold(header *hdr);
+void header_fold(header *hdr);
+header *create_header(header_id id, gchar *fmt, ...);
+void destroy_header(header *hdr);
+header *copy_header(header *hdr);
+header *get_header(gchar *line);
+
+/* smtp_in.c */
+void smtp_in(FILE *in, FILE *out, gchar *remote_host, gchar *ident);
+
+/* listen.c */
+void listen_port(GList *addr_list, gint qival, char *argv[]);
+
+/* parse.c */
+gboolean split_address(const gchar *path, gchar **local_part, gchar **domain,
+		       gboolean is_rfc821);
+gboolean parse_address_rfc822(gchar *string,
+		       gchar **local_begin, gchar **local_end,
+		       gchar **domain_begin, gchar **domain_end,
+			      gchar **address_end);
+gboolean parse_address_rfc821(gchar *string,
+			      gchar **local_begin, gchar **local_end,
+			      gchar **domain_begin, gchar **domain_end,
+			      gchar **address_end);
+address *_create_address(gchar *string, gchar **end, gboolean is_rfc821);
+address *create_address_rfc821(gchar *string, gchar **end);
+address *create_address_rfc822(gchar *string, gchar **end);
+GList *addr_list_append_rfc822(GList *addr_list, gchar *string, gchar *domain);
+gboolean addr_isequal(address *addr1, address *addr2);
+
+/* connect.c */
+mxip_addr *connect_hostlist(int *psockfd, gchar *host, guint port,
+			  GList *addr_list);
+mxip_addr *connect_resolvelist(int *psockfd, gchar *host, guint port,
+			     GList *res_funcs);
+
+/* deliver.c */
+void msg_rcptlist_local(GList *rcpt_list, GList **, GList **);
+gboolean deliver_local(msg_out *msgout);
+gboolean deliver_msglist_host(connect_route *route, GList *msg_list, gchar *host, GList *res_list);
+gboolean deliver_route_msgout_list(connect_route *route, GList *msgout_list);
+gboolean deliver_route_msg_list(connect_route *route, GList *msgout_list);
+gboolean deliver_finish(msg_out *msgout);
+gboolean deliver_finish_list(GList *msgout_list);
+gboolean deliver_msg_list(GList *msg_list, guint flags);
+gboolean deliver(message *msg);
+
+/* fail_msg.c */
+gboolean fail_msg(message *msg, gchar *template,
+		  GList *failed_rcpts, gchar *err_fmt, va_list args);
+gboolean warn_msg(message *msg, gchar *template,
+		  GList *failed_rcpts, gchar *err_fmt, va_list args);
+
+/* get.c */
+gboolean get_from_file(gchar *fname);
+gboolean get_from_name(gchar *name);
+gboolean get_all(void);
+void get_online(void);
+void get_daemon(gint gival, char *argv[]);
+gboolean pop_before_smtp(gchar *fname);
+
+/* interface.c */
+gboolean init_sockaddr(struct sockaddr_in *name, interface *iface);
+int make_server_socket(interface *iface);
+
+/* local.c */
+gboolean append_file(message *msg, GList *hdr_list, gchar *user);
+gboolean maildir_out(message *msg, GList *hdr_list, gchar *user, guint flags);
+gboolean pipe_out(message *msg, GList *hdr_list, address *rcpt, gchar *cmd, guint flags);
+
+/* log.c */
+gchar *ext_strerror(int err);
+gboolean logopen(void);
+void logclose(void);
+void vlogwrite(int pri, const char *fmt, va_list args);
+void logwrite(int pri, const char *fmt, ...);
+void debugf(const char *fmt, ...);
+void vdebugf(const char *fmt, va_list args);
+void maillog(const char *fmt, ...);
+
+/* spool.c */
+gboolean spool_read_data(message *msg);
+gboolean spool_read_data(message *msg);
+message *msg_spool_read(gchar *uid, gboolean do_readdata);
+gboolean spool_write(message *msg, gboolean do_writedata);
+gboolean spool_lock(gchar *uid);
+gboolean spool_unlock(gchar *uid);
+gboolean spool_delete_all(message *msg);
+
+/* queue.c */
+GList *read_queue(gboolean do_readdata);
+gboolean queue_run(void);
+gboolean queue_run_online(void);
+void queue_list(void);
+gboolean queue_delete(gchar *uid);
+
+/* online.c */
+gchar *detect_online();
+void set_online_name(gchar *name);
+
+/* permissions.c */
+gboolean is_ingroup(uid_t uid, gid_t gid);
+void set_euidgid(gint uid, gint gid, uid_t *old_uid, gid_t *old_gid);
+void set_identity(uid_t old_uid, gchar *task_name);
+
+/* rewrite.c */
+gboolean set_address_header_domain(header *hdr, gchar *domain);
+gboolean map_address_header(header *hdr, GList *table);
+
+/* route.c */
+msgout_perhost *create_msgout_perhost(gchar *host);
+void destroy_msgout_perhost(msgout_perhost *mo_ph);
+void rewrite_headers(msg_out *msgout, connect_route *route);
+void rcptlist_with_one_of_hostlist(GList *rcpt_list, GList *host_list,
+				     GList **, GList **);
+void rcptlist_with_addr_is_local(GList *rcpt_list,
+				   GList **p_rcpt_list, GList **p_non_rcpt_list);
+gboolean route_strip_msgout(connect_route *route, msg_out *msgout);
+msg_out *route_prepare_msgout(connect_route *route, msg_out *msgout);
+GList *route_msgout_list(connect_route *route, GList *msgout_list);
+gboolean route_is_allowed_return_path(connect_route *route, address *ret_path);
+gboolean route_is_allowed_mail_local(connect_route *route, address *ret_path);
+void msg_rcptlist_route(connect_route *route, GList *rcpt_list,
+			GList **p_rcpt_list, GList **p_non_rcpt_list);
+
+/* tables.c */
+table_pair *create_pair(gchar *key, gpointer value);
+table_pair *create_pair_string(gchar *key, gpointer value);
+table_pair *parse_table_pair(gchar *line, char delim);
+gpointer *table_find_func(GList *table_list, gchar *key, int (*cmp_func)(const char *, const char *));
+gpointer *table_find(GList *table_list, gchar *key);
+gpointer *table_find_case(GList *table_list, gchar *key);
+gpointer *table_find_fnmatch(GList *table_list, gchar *key);
+GList *table_read(gchar *fname, gchar delim);
+void destroy_table(GList *table);
+
+/* timeival.c */
+gint time_interval(gchar *str, gint *pos);
+
+/* permissions.c */
+gboolean is_privileged_user(uid_t uid);
+
+/* other things */
+
+#define foreach(list, node)\
+for((node) = g_list_first(list);\
+    (node);\
+    (node) = g_list_next(node))
+
+#ifdef ENABLE_DEBUG
+#define DEBUG(level) if(level <= conf.debug_level)
+#else
+/* hopefully the compiler optmizes this away... */
+#define DEBUG(level) if(0)
+#endif
+
+#define LOG_VERBOSE 0x100
+
+#ifndef HAVE_GETLINE
+#define getline(buf, size, file) getdelim(buf, size, '\n', file)
+#endif
+
+#ifndef HAVE_FDATASYNC
+#define fdatasync(fd) fsync(fd)
+#endif
+
+#ifndef CONF_DIR
+#define CONF_DIR "/etc/masqmail"
+#endif
+
+#define CONF_FILE CONF_DIR"/masqmail.conf"
+
+#define PIDFILEDIR "/var/run/masqmail/"
+
+#ifndef va_copy
+#ifdef __va_copy
+#define va_copy(ap1, ap2) __va_copy(ap1, ap2)
+#else
+#define va_copy(ap1, ap2) G_VA_COPY(ap1, ap2)
+#endif
+#endif
+
+/* *BSD needs this: */
+extern char **environ;