/*
 * Mbuni - Open  Source MMS Gateway 
 * 
 * Misc. functions
 * 
 * Copyright (C) 2003 - 2005, Digital Solutions Ltd. - http://www.dsmagic.com
 *
 * Paul Bagyenda <bagyenda@dsmagic.com>
 * 
 * This program is free software, distributed under the terms of
 * the GNU General Public License, with a few exceptions granted (see LICENSE)
 */ 
#ifndef __MMS_UTIL__INCLUDED__
#define __MMS_UTIL__INCLUDED__

#include "gwlib/gwlib.h"
#include "gwlib/mime.h"

#include "config.h"
#include "mms_strings.h"
#include "mms_msg.h"
#include "mms_billing.h"
#include "mms_resolve.h"
#include "mms_detokenize.h"
#include "mms_mmbox.h"

/* Send errors */
#define MMS_SEND_OK 0
#define MMS_SEND_ERROR_TRANSIENT -1
#define MMS_SEND_ERROR_FATAL -2

#define SEND_ERROR_STR(e) ((e) == MMS_SEND_OK ? "Sent" : (e) == MMS_SEND_ERROR_TRANSIENT ? "Retry later" : "Failed")
/* Useful headers. */
#define XMSISDN_HEADER  "X-WAP-Network-Client-MSISDN"
#define XIP_HEADER  "X-WAP-Network-Client-Address"
#define MM_NAME "DS_MM"

typedef struct MmsProxyRelay {
     Octstr *host;
     Octstr *name;  
     Octstr *allowed_prefix;
     Octstr  *denied_prefix;
} MmsProxyRelay;

typedef struct MmsBoxSettings {
     Octstr *system_user;
     Octstr *name, *hostname, *host_alias;
     List *local_domains;
     Octstr *unified_prefix, *local_prefix;
     Octstr *sendmail;
     Octstr *global_queuedir, *mm1_queuedir, *mm4_queuedir;
     Octstr *mmbox_rootdir;
     
     Octstr *ua_profile_cache_dir;
     
     long maxthreads;
     long maxsendattempts;
     long default_msgexpiry;
     double queue_interval;
     long send_back_off;
     
     long port;

     Octstr *allow_ip;
     Octstr *deny_ip;

     Octstr *email2mmsrelay_prefixes; 
     Octstr *sendsms_url;
#if 0
     Octstr *sendsms_user, *sendsms_pass, *sendsms_globalsender;
#endif
     Octstr *billing_params;

     MmsBillingFuncStruct *mms_billfuncs; /* Link to billing funcs. */
     void *mms_bill_module_data;

     Octstr *resolver_params;
     MmsResolverFuncStruct *mms_resolvefuncs; /* Link to resolver funcs. */
     void *mms_resolver_module_data;

     Octstr *detokenizer_params;
     MmsDetokenizerFuncStruct *mms_detokenizefuncs; /* Link to detokenizer funcs. */
     void *mms_detokenizer_module_data;

     int allow_ip_type;

     int optimize_notification_size;
     
     Octstr *prov_notify;
     Octstr *prov_notify_arg;
     Octstr *prov_getstatus;
     int notify_unprovisioned;
     Octstr *mms_notify_txt;
     Octstr *mms_notify_unprov_txt;
     Octstr *mms_toolarge;
     Octstr *mmbox_host; /* XXX need to remove this. */

     Octstr *mms_email_txt;
     Octstr *mms_email_html;
     Octstr *wap_gw_msisdn_header;
     Octstr *wap_gw_ip_header;
} MmsBoxSettings;

/* Global variables and shared code used by all modules. */


extern char *mms_hostname;  /* Our hostname. */
#define MMSC_VERSION VERSION
#define MMS_NAME PACKAGE

/* Message location flags: Used to distinguish fetch-urls */
enum mms_loc_t {MMS_LOC_MMBOX = 1, MMS_LOC_MQUEUE=2};

/* Returns mmsbox settings. */
MmsBoxSettings *mms_load_mmsbox_settings(Cfg *cfg);


/* Returns list of MmsProxyRelay */
extern List *mms_proxy_relays(Cfg *cfg);

extern Octstr *mms_makefetchurl(char *qf, Octstr *token, int loc,
				MmsBoxSettings *settings);

extern Octstr *mms_maketransid(char *qf, Octstr *mmscname);

extern Octstr *mms_getqf_fromtransid(Octstr *transid);

extern int mms_decodefetchurl(Octstr *fetch_url, 
			      Octstr **qf, Octstr **token, int *loc);

Octstr *mms_find_sender_msisdn(Octstr **send_url, List *request_hdrs, Octstr *msisdn_header, MmsDetokenizerFuncStruct *detokenizerfuncs);
Octstr *mms_find_sender_ip(List *request_hdrs, Octstr *ip_header, Octstr *ip, int *isv6);

extern Octstr *mms_isodate(time_t t);
void mms_lib_init(void);

/* get content type while stripping params. If any param is null, fails. */
int get_content_type(List *hdrs, Octstr **type, Octstr **params);

/* Takes a header value, returns the value proper and any parameters... */
int split_header_value(Octstr *value, Octstr **base_value, Octstr **params);
/* Returns a list of parameters as http_headers given the semi-comma delimited string.*/
List  *get_value_parameters(Octstr *params);

Octstr *make_value_parameters(List *params);

/* Where value is comma-separated, make separate header items. */
void unpack_mimeheaders(MIMEEntity *m);

/* Where element has base64 encoding, decode. */
void unbase64_mimeparts(MIMEEntity *m);

/* Where element contains binary data, encode it base64. */
void base64_mimeparts(MIMEEntity *m);

void notify_prov_server(char *cmd, char *from, char *event, char *arg);
int mms_ind_send(Octstr *prov_cmd, Octstr *to);


/* Send this message to email recipient: Returns 0 on success 1 or 2 on profile error 
 * (negate to get right one), -ve on some other error
 */
int mms_sendtoemail(Octstr *from, Octstr *to, 
		    Octstr *subject, Octstr *msgid,
		    MmsMsg *msg, int dlr, Octstr **error,
		    char *sendmail_cmd, Octstr *myhostname, 
		    int trans_msg,
		    int trans_smil, char *txt, char *html, int append_hostname);

/* log to access log. */
void mms_log(char *logmsg, Octstr *from, List *to, 
	     int msize, Octstr *msgid,
	     Octstr *acct,
	     Octstr *viaproxy,
	     char *interface, 
	     Octstr *ua, Octstr *mmboxloc);

void mms_log2(char *logmsg, Octstr *from, Octstr *to, 
	      int msize, Octstr *msgid,
	      Octstr *acct,
	      Octstr *viaproxy,
	      char *interface, 
	      Octstr *ua, Octstr *mmboxloc);

/*
 * lockfile: tries to lock a file, returns 0 if success, errno (which could be +ve) otherwise.
 * we use flock()
 */
int mm_lockfile(int fd, char *fname, int shouldblock);

#endif