/* MMS Message structure definition, encoder and decoder and helper functions
 * 
 */
#include <time.h>
#include <ctype.h>
#include "mms_msg.h"
#include "mms_util.h"

struct MmsMsg {
     int message_type; 
     Octstr *msgId;
     List *headers; /* Of type HTTPHeader. */
     
     unsigned char ismultipart;
     union {
	  List *l;
	  Octstr *s;
     } body; /* list of MIMEEntity (for multipart), text otherwise.*/
};


#define SIZHINT 47

static void mm_destroy(MIMEEntity *mx);
static void pack_short_integer(Octstr *s, int ch)
{
     unsigned char c = ch|0x80;

     octstr_append_data(s, &c, 1);
}
#if 0
static void encode_uint(Octstr *os, unsigned int l)
{
     char xbuf[5];
     int i = 0; 
     
     do {
	  xbuf[i++] = l&0x7f;
	  l>>=7;
     } while (i < 5 && l);

     while (--i > 0) {
	  xbuf[i] |= 0x80;
	  octstr_append_data(os, &xbuf[i], 1);
     }

     octstr_append_data(os, &xbuf[0], 1);
}
#endif

int mms_validate_address(Octstr *s)
{

     int i = octstr_search_char(s, '/', 0);
     int l = octstr_len(s);
     
     if (octstr_search_char(s, '@', 0) > 0)
	  return 0;
     else if (i >= 0)	
	  if (octstr_case_search(s, octstr_imm("PLMN"), 0) + 4 == l ||
	      octstr_case_search(s, octstr_imm("IPv4"), 0) + 4 == l ||
	      octstr_case_search(s, octstr_imm("IPv6"), 0) + 4 == l)
	       return 0;
	  else
	       return -1;
     else
	  return -1;
     
}


static int decode_multipart(ParseContext *context, List *body)
{
     int i=0, n;

     n = parse_get_uintvar(context);
     
     for  (i = 0; i<n && parse_octets_left(context) > 0 ; i++) {
	  int dlen, hlen;
	  MIMEEntity *x = gw_malloc(sizeof *x);	 

	  Octstr *hs;
	  Octstr *content;
	  Octstr *content_type;

	  memset(x, 0,sizeof *x);

	  hlen = parse_get_uintvar(context);
	  dlen = parse_get_uintvar(context);
	  
	  parse_limit(context, hlen);



	  hs = parse_get_octets(context, parse_octets_left(context));
	  x->headers = wsp_headers_unpack(hs, 1);

	  octstr_destroy(hs);
	  
	  parse_skip_to_limit(context);
	  parse_pop_limit(context);
	  
	  content_type = http_header_value(x->headers, octstr_imm("Content-Type"));	  
	  content = parse_get_octets(context, dlen);

	  if (!content || !content_type) { 
	       int pleft = parse_octets_left(context);
	       warning(0, "Parse error reading mime body [hlen=%d, dlen=%d, left=%d]!",hlen,dlen, pleft);
	       mime_entity_destroy(x);
	       if (content_type) octstr_destroy(content_type);
	       return -1;
	  }
	  if (octstr_case_compare(content_type, 
				 octstr_imm("application/vnd.wap.multipart.related")) == 0 ||
	      octstr_case_compare(content_type, 
				 octstr_imm("application/vnd.wap.multipart.alternative")) == 0 ||
	      octstr_case_compare(content_type, 
				 octstr_imm("application/vnd.wap.multipart.mixed")) == 0) { /* Body is multipart. */
	       ParseContext *p = parse_context_create(content);
	       int res;
	       List *ml =  x->multiparts = list_create();
	       
	       res = decode_multipart(p, x->multiparts);
	       octstr_destroy(content);
	       parse_context_destroy(p);

	       if (res < 0) {
		    list_destroy(ml, (list_item_destructor_t *)mime_entity_destroy);
		    return -1;
	       }
	  } else 
	       x->body = content;
	  
	  octstr_destroy(content_type);

	  list_append(body, x);
     }
     return 0;         
}

static int encode_multipart(Octstr *os, List *body)
{
     int i=0, n;

     n = list_len(body);
     octstr_append_uintvar(os, n);

     while (i<n) {
	  Octstr *mhdr, *mbody = octstr_create("");
	  MIMEEntity *x = list_get(body, i);


	  mhdr = wsp_headers_pack(x->headers, 1, WSP_1_3);

	  if (x->multiparts && 
	      list_len(x->multiparts) > 0)  /* This is a multi-part, go down further. */
	       encode_multipart(mbody, x->multiparts);
	  else if (x->body)
	       octstr_append(mbody, x->body);
	  
	  octstr_append_uintvar(os, octstr_len(mhdr));
	  octstr_append_uintvar(os, octstr_len(mbody));

	  octstr_append(os, mhdr);
	  octstr_append(os, mbody);

	  octstr_destroy(mhdr);
	  octstr_destroy(mbody);

	  i++;
     }
     return 0;         
}

static int decode_msgbody(ParseContext *context, MmsMsg *msg)
{
     int res = 0;
     if (msg->ismultipart) {
	  msg->body.l = list_create();
	  res = decode_multipart(context, msg->body.l);
     } else 
	  msg->body.s = parse_get_rest(context);

     return res;     
}

static void encode_msgbody(Octstr *os, MmsMsg *msg)
{
     if (msg->ismultipart) 
	  encode_multipart(os, msg->body.l);    
     else
	  octstr_append(os, msg->body.s);
}

/* Decodes it and returns the value, which is a pointer into the string so be careful! */
static void mms_unpack_well_known_field(List *unpacked, int field_type,
					ParseContext *context, Octstr *xfrom)
{
     int val, ret;
     char *hname = NULL;

     Octstr *decoded = NULL;
     char *ch = NULL;

     ret = wsp_field_value(context, &val);

     if (parse_error(context)) {
	  warning(0, "Faulty header [code = %d], skipping remaining headers.", field_type);
	  parse_skip_to_limit(context);
	  return;
     }

     hname = mms_header_to_cstr(field_type);

     if (ret == WSP_FIELD_VALUE_NUL_STRING) 
	  decoded = parse_get_nul_string(context);
     
     switch (field_type) {
	  
     case MMS_HEADER_TO:
     case MMS_HEADER_CC:
     case MMS_HEADER_BCC:

	  if (ret == WSP_FIELD_VALUE_DATA) { /* expect charset text. */
	       long charset; /* Get it and ignore it. */
	       wsp_secondary_field_value(context, &charset);
	       decoded = parse_get_nul_string(context);
	  } else if (ret != WSP_FIELD_VALUE_NUL_STRING) {
	       warning(0, "Faulty header value for %s!\n", hname);
	       decoded = octstr_imm("");
	  }

	  if (mms_validate_address(decoded))
	       warning(0, "Faulty address [%s] format in field %s!", 
		       octstr_get_cstr(decoded), hname);
	  break;
     case MMS_HEADER_SUBJECT:
     case MMS_HEADER_RESPONSE_TEXT:
     case MMS_HEADER_RETRIEVE_TEXT:

	  if (ret == WSP_FIELD_VALUE_DATA) { /* encoded string, expect charset then text. */
	       long charset; /* Get it and ignore it. */
	       wsp_secondary_field_value(context, &charset);
	       decoded = parse_get_nul_string(context);
	  } else if (ret != WSP_FIELD_VALUE_NUL_STRING) {
	       warning(0, "Faulty header value for %s!\n", hname);
	       decoded = octstr_imm("");
	  }	  
	  break;
     case MMS_HEADER_TRANSACTION_ID:
     case MMS_HEADER_CONTENT_LOCATION:
     case MMS_HEADER_MESSAGE_ID:
     case MMS_HEADER_REPLY_CHARGING_ID:
	  if (ret != WSP_FIELD_VALUE_NUL_STRING)
	       warning(0, "Unexpected field value type %d for header %s\n",
		       ret, hname);
	  
	  break;	       
     case MMS_HEADER_MMS_VERSION:
	  if (ret == WSP_FIELD_VALUE_ENCODED)
	       decoded = wsp_unpack_version_value(val);
	  break;
	  /* integer/octet values */
     case MMS_HEADER_DELIVERY_REPORT:	 
     case MMS_HEADER_REPORT_ALLOWED:
     case MMS_HEADER_READ_REPORT:
	  ch = mms_reports_to_cstr(val);
	  break;
     case MMS_HEADER_MESSAGE_TYPE:
	  ch = mms_message_type_to_cstr(val);
	  break;
     case MMS_HEADER_PRIORITY:
	  ch = mms_priority_to_cstr(val);
	  break;
     case MMS_HEADER_READ_STATUS:
	  ch = mms_read_status_to_cstr(val);
	  break;	  
     case MMS_HEADER_REPLY_CHARGING:
	  ch = mms_reply_charging_to_cstr(val);
	  break;

     case MMS_HEADER_RESPONSE_STATUS:
	  ch = mms_response_status_to_cstr(val);
	  break;
     case MMS_HEADER_RETRIEVE_STATUS:
	  ch = mms_retrieve_status_to_cstr(val);
	  break;
     case MMS_HEADER_STATUS:
	  ch = mms_status_to_cstr(val);
	  break;
     case MMS_HEADER_SENDER_VISIBILITY:
	  ch = mms_visibility_to_cstr(val);
	  break;
     case MMS_HEADER_MESSAGE_CLASS: 	  
	  if (ret != WSP_FIELD_VALUE_NUL_STRING) 
	       ch = mms_message_class_to_cstr(val);	              
	  break;
	  
     case MMS_HEADER_DATE: /* Date values. */	       
	  parse_skip(context, -1); 
	  decoded = wsp_unpack_date_value(context);
	  break;	  

     case MMS_HEADER_MESSAGE_SIZE:
	  parse_skip(context, -1); 
	  decoded = wsp_unpack_integer_value(context);
	  break;
	  
     case MMS_HEADER_CONTENT_TYPE:
	  if (ret == WSP_FIELD_VALUE_ENCODED)
	       ch  = wsp_content_type_to_cstr(val);
	  else if (ret == WSP_FIELD_VALUE_DATA) 
	       decoded = wsp_unpack_accept_general_form(context);

	  break;
	  
     case MMS_HEADER_DELIVERY_TIME:
     case MMS_HEADER_EXPIRY:
     case MMS_HEADER_REPLY_CHARGING_DEADLINE:
	  
	  
	  if (ret != WSP_FIELD_VALUE_DATA) 
		    warning(0, "Error in value format, field %s!",
			    hname);
	  else {
	       int n = parse_get_char(context);
	       
	       if (n == 0x80) /* Absolute time */
		    decoded = wsp_unpack_date_value(context);
	       else if (n == 0x81) { /* Relative time. */			 
		    long l = 0;
		    time_t t = time(NULL);
		    Octstr *s = wsp_unpack_integer_value(context);
		    
		    octstr_parse_long(&l, s, 0, 10);
		    octstr_destroy(s);			 
		    
		    t += l;
		    decoded = date_format_http(t);			 
	       } else
		    decoded = date_format_http(time(NULL)); /* A default. */
	  }	       
	  break;
     case MMS_HEADER_FROM:
	       if (ret != WSP_FIELD_VALUE_DATA) 
		    warning(0, "Error in value format, field %s!",hname);
	       
	       else {	       
		    int n = parse_get_char(context);
		    
		    if (n == 0x80) { /* Address present. */
			 int val = 0;
			 int ret2 = wsp_field_value(context, &val);

			 if (ret2 == WSP_FIELD_VALUE_DATA) { /* expect charset text. */
			      long charset; /* Get it and ignore it. */
			      wsp_secondary_field_value(context, &charset);
			      decoded = parse_get_nul_string(context);
			      parse_skip_to_limit(context);
			      parse_pop_limit(context);
			 } else if (ret2 != WSP_FIELD_VALUE_NUL_STRING) {
			      warning(0, "Faulty header value for %s!\n", hname);
			      decoded = octstr_imm("");
			 } else 
			      decoded = parse_get_nul_string(context);
			 if (mms_validate_address(decoded))
			      warning(0, "Faulty address [%s] format in field %s!", 
				      octstr_get_cstr(decoded), hname);			 
		    } else /* Insert address. */
			 decoded = octstr_duplicate(xfrom);
	       }
	       break;
     case MMS_HEADER_PREVIOUSLY_SENT_BY:
     case MMS_HEADER_PREVIOUSLY_SENT_DATE:
	  if (ret != WSP_FIELD_VALUE_DATA) 
	       warning(0, "Error in value format, field %s!",hname);
	  else {
	       Octstr *t;
	       decoded = wsp_unpack_integer_value(context);
	       
	       if (field_type == MMS_HEADER_PREVIOUSLY_SENT_BY) { 		
		    int val = 0;
		    int ret2 = wsp_field_value(context, &val);
		    
		    if (ret2 == WSP_FIELD_VALUE_DATA) { /* expect charset text. */
			 long charset; /* Get it and ignore it. */
			 wsp_secondary_field_value(context, &charset);
			 t = parse_get_nul_string(context);
			 parse_skip_to_limit(context);
			 parse_pop_limit(context);
		    } else if (ret2 != WSP_FIELD_VALUE_NUL_STRING) {
			 warning(0, "Faulty header value for %s!\n", hname);
			 t = octstr_imm("");
		    } else 
			 t = parse_get_nul_string(context);
	      }  else
		    t = wsp_unpack_date_value(context);
	       
	       octstr_append(decoded, t);
	       octstr_destroy(t);
	  }
     break;     
     default:
	  warning(0, "MMS: Unknown header with code 0x%02x!", field_type);
     }

     if (ret == WSP_FIELD_VALUE_DATA) {
	  parse_skip_to_limit(context);
	  parse_pop_limit(context);
     }

     if (ch == NULL && decoded != NULL)
	  ch = octstr_get_cstr(decoded);
     
     if (ch == NULL)
	  goto value_error;
     
     if (!hname) {
	  warning(0, "Unknown header number 0x%02x.", field_type);
	  goto value_error;
     }
     
     http_header_add(unpacked, hname, ch);
     if (decoded) octstr_destroy(decoded);
     return;
     
 value_error:
     warning(0, "Skipping faulty header [code = %d, val=%d]!", field_type, val);
     octstr_destroy(decoded);     
}

static int decode_msgheaders(ParseContext *context, MmsMsg *msg, Octstr *from)
{
     int fcont = 1;

     gw_assert(msg->headers == NULL);
     msg->headers = list_create();

     mms_strings_init(); /* Just in case. */
     
     while (fcont && parse_octets_left(context) && 
	  !parse_error(context)) {
	  int byte = parse_get_char(context);

	  
	  if (byte >= 128)
	       mms_unpack_well_known_field(msg->headers, byte&0x7f, context, from);
	  else {
	       parse_skip(context, -1); /* Go back a bit. */
	       wsp_unpack_app_header(msg->headers, context);
	  }
	  if ((byte&0x7f) ==  MMS_HEADER_CONTENT_TYPE)
	       fcont = 0;
     }
     
     return 0;
}


static void mms_pack_well_known_field(Octstr *os, int field_type, Octstr *value)
{
     Octstr *encoded = octstr_create("");
     int ch = 0;
     unsigned char c;

     switch (field_type) {
	  
     case MMS_HEADER_TO:
     case MMS_HEADER_CC:
     case MMS_HEADER_BCC:
     case MMS_HEADER_SUBJECT:
     case MMS_HEADER_TRANSACTION_ID:
     case MMS_HEADER_CONTENT_LOCATION:
     case MMS_HEADER_MESSAGE_ID:
     case MMS_HEADER_REPLY_CHARGING_ID:
     case MMS_HEADER_RESPONSE_TEXT:
     case MMS_HEADER_RETRIEVE_TEXT:
	  wsp_pack_text(os, value);
	  break;	       
     case MMS_HEADER_MMS_VERSION:
	  wsp_pack_version_value(os, value);
	  break;
	  /* integer/octet values: Need to stream line this with better error-checking */
     case MMS_HEADER_DELIVERY_REPORT:	 
     case MMS_HEADER_REPORT_ALLOWED:
     case MMS_HEADER_READ_REPORT:
	  pack_short_integer(os, mms_string_to_reports(value));
	  break;
     case MMS_HEADER_MESSAGE_TYPE:
	   pack_short_integer(os, mms_string_to_message_type(value));
	  break;
     case MMS_HEADER_PRIORITY:
	  pack_short_integer(os, mms_string_to_priority(value));
	  break;
     case MMS_HEADER_READ_STATUS:
	  pack_short_integer(os, mms_string_to_read_status(value));
	  break;	  
     case MMS_HEADER_REPLY_CHARGING:
	  pack_short_integer(os, mms_string_to_reply_charging(value));
	  break;

     case MMS_HEADER_RESPONSE_STATUS:
	  pack_short_integer(os, mms_string_to_response_status(value));
	  break;
     case MMS_HEADER_RETRIEVE_STATUS:
	  pack_short_integer(os, mms_string_to_retrieve_status(value));
	  break;
     case MMS_HEADER_STATUS:
	  pack_short_integer(os, mms_string_to_status(value));
	  break;
     case MMS_HEADER_SENDER_VISIBILITY:
	  pack_short_integer(os, mms_string_to_visibility(value));
	  break;
     case MMS_HEADER_MESSAGE_CLASS: 	  
	  ch = mms_string_to_message_class(value);
	  if (ch < 0)
	       wsp_pack_text(os, value);
	  else
	       pack_short_integer(os, ch);
	  break;
	  
     case MMS_HEADER_DATE: /* Date values. */	       
	  wsp_pack_date(os, value);
	  break;	  

     case MMS_HEADER_MESSAGE_SIZE:
	  wsp_pack_integer_string(os, value);
	  break;
	  
     case MMS_HEADER_CONTENT_TYPE:
	  wsp_pack_content_type(os, value);
	  break;
	  
     case MMS_HEADER_DELIVERY_TIME:
     case MMS_HEADER_EXPIRY:
     case MMS_HEADER_REPLY_CHARGING_DEADLINE:

	  if (octstr_isnum(value) == 1) { 	       /* A delta value. */

	       long l;

	       sscanf(octstr_get_cstr(value), "%ld", &l);
	       c = 129;
	       octstr_append_char(encoded, c);
	       wsp_pack_long_integer(encoded, l);
	  } else {  /* Must be a date value .*/
	       c = 128;
	       octstr_append_char(encoded, c);	       
	       wsp_pack_date(encoded, value);
	  }

	  wsp_pack_value(os, encoded);

	  break;
     case MMS_HEADER_FROM:

	  if (octstr_compare(octstr_imm("#insert"), value) == 0) {
	       c = 129;
	       octstr_append_data(encoded, &c, 1);
	  } else {
	       c = 128;
	       octstr_append_data(encoded, &c, 1);
	       wsp_pack_text(encoded, value);
	  }
	  wsp_pack_value(os, encoded);
	  
	       break;
     case MMS_HEADER_PREVIOUSLY_SENT_BY:
     case MMS_HEADER_PREVIOUSLY_SENT_DATE:
     {
	  long i, l;
	  Octstr *s;
	  
	  i = octstr_parse_long(&l, value, 0, 10);

	  if (i <0) {
	       warning(0, "Bad counter indicator for field!");
	       i = 0;
	  }
	  
	  wsp_pack_integer_value(encoded, l);
	  s = octstr_copy(value, i, octstr_len(value));

	  if (field_type == MMS_HEADER_PREVIOUSLY_SENT_BY) 		
	       wsp_pack_text(encoded, s);
	  else
	      wsp_pack_date(encoded, s);
	       
	  octstr_destroy(s);
	  wsp_pack_value(os, encoded);
     }
     break;     
     default:
	  warning(0, "MMS: Unknown header with code 0x%02x!", field_type);
     }

     if (encoded) octstr_destroy(encoded);
     return;
}

static int encode_msgheaders(Octstr *os, MmsMsg *msg)
{
     int fcont = 1;
     List *hdrs = msg->headers;
     int i, l = list_len(hdrs), mtype;
     
     Octstr *msgtype = NULL, *transid = NULL, *version = NULL, *ctype;
     
     /* First ensure that top headers are in place. */

     version = http_header_value(hdrs, 
				 octstr_imm("X-Mms-MMS-Version"));
     transid = http_header_value(hdrs, 
				 octstr_imm("X-Mms-Transaction-Id"));
     msgtype = http_header_value(hdrs, 
				 octstr_imm("X-Mms-Message-Type"));
     
     ctype = http_header_value(hdrs, 
				 octstr_imm("Content-Type"));
     
     mtype = mms_string_to_message_type(msgtype);
     
     pack_short_integer(os, MMS_HEADER_MESSAGE_TYPE);
     pack_short_integer(os, mtype);
     octstr_destroy(msgtype);
     
     if (transid) {
	  pack_short_integer(os, MMS_HEADER_TRANSACTION_ID);
	  wsp_pack_text(os, transid);
	  octstr_destroy(transid);
     }
     pack_short_integer(os, MMS_HEADER_MMS_VERSION);
     wsp_pack_version_value(os, version);
     octstr_destroy(version);
     
     /* Now pack the rest. */
     for (i = 0; fcont && i < l; i++) {
	  Octstr *field = NULL, *value = NULL;	  
	  int htype;
	  
	  http_header_get(hdrs, i, &field, &value);

	  htype = mms_string_to_header(field);

	  if (htype == MMS_HEADER_MMS_VERSION ||
	      htype == MMS_HEADER_MESSAGE_TYPE ||
	      htype == MMS_HEADER_TRANSACTION_ID ||
	      htype == MMS_HEADER_CONTENT_TYPE)
	       goto loop1;

	  if (htype < 0)
	       wsp_pack_application_header(os, field, value);
	  else {
	       pack_short_integer(os, htype);
	       mms_pack_well_known_field(os, htype, value);	       
	  }
     loop1:
	  if (field) octstr_destroy(field);
	  if (value) octstr_destroy(value);
     }
     
     if (ctype) {
	  pack_short_integer(os, MMS_HEADER_CONTENT_TYPE);
	  wsp_pack_content_type(os, ctype);
	  octstr_destroy(ctype);
     } else if (mtype == MMS_MSGTYPE_SEND_REQ || 
		mtype == MMS_MSGTYPE_RETRIEVE_CONF)
	  warning(0, "MMS: Content type missing in encode_headers!");
     
     return 0;

}

/* Does basic fixups on a message. */
static int fixup_msg(MmsMsg *m, Octstr *from)
{
     if (!m)
	  return -1;

     if (m->message_type == MMS_MSGTYPE_SEND_REQ) {
	  Octstr *s = NULL;

	  /* Check for from. */
	  if (from && (s = http_header_value(m->headers, octstr_imm("From"))) == NULL) 
	       http_header_add(m->headers, "From", octstr_get_cstr(from));
	  else if (s)
	       octstr_destroy(s);
	  
	  /* Check for date. */
	  
	  if ((s = http_header_value(m->headers, octstr_imm("Date"))) == NULL) {
	       Octstr *t = date_format_http(time(NULL));
	       http_header_add(m->headers, "Date", octstr_get_cstr(t));
	       octstr_destroy(t);
	  } else
	       octstr_destroy(s);
	  
     }

     return 0;
}
MmsMsg *mms_frombinary(Octstr *msg, Octstr *from)
{
     int res = 0;
     MmsMsg _m = {0}, *m = NULL;
     ParseContext *p = parse_context_create(msg);
     
     Octstr *s;
     
     decode_msgheaders(p, &_m, from);

     if (_m.headers == NULL || 
	 list_len(_m.headers) == 0) 
	  goto done;
     
     /* Get the message type and also set flag for whether multipart.*/
     
     s = http_header_value(_m.headers, octstr_imm("Content-Type"));     
     if (s && 
	 octstr_search(s, octstr_imm("application/vnd.wap.multipart"), 0) == 0)
	  _m.ismultipart = 1;
     if (s) 
	  octstr_destroy(s);

     s = http_header_value(_m.headers, octstr_imm("X-Mms-Message-Type"));     
     if (s) {
	  _m.message_type = mms_string_to_message_type(s); 
	  octstr_destroy(s);
     } else {
	  if (_m.headers) http_destroy_headers(_m.headers);
	  goto done;	  
     }
     s = http_header_value(_m.headers, octstr_imm("Message-ID"));          
     _m.msgId = s;
 
     if ((res = decode_msgbody(p, &_m)) < 0) {
	  MmsMsg *msg = &_m;
	  if (msg->ismultipart && msg->body.l) 
	       list_destroy(msg->body.l, (list_item_destructor_t *)mm_destroy);     
	  else if (msg->body.s)
	       octstr_destroy(msg->body.s);
     }
	 
     m = gw_malloc(sizeof (*m));
     *m = _m;     
     
     fixup_msg(m, from);

     /* XXXX better error checking needed. */     
 done:
     parse_context_destroy(p);

     return m;
}

static void _x_mime_entity_dump(MIMEEntity *x, int level, int headers_only)
{
     int i, n, ism;
     
     ism = (x->multiparts && list_len(x->multiparts) > 0) ? 1 : 0;
     debug("part.dump", 0, "%sMultipart -> ", ism ? "" : "Not ");
     http_header_dump(x->headers);

     if (ism) 
	  for (i = 0, n = list_len(x->multiparts); i<n; i++)
	       _x_mime_entity_dump(list_get(x->multiparts, i), level+1, headers_only);
     else if (x->body && !headers_only)
	  octstr_dump(x->body, level);	       
}

void mms_msgdump(MmsMsg *m, int headers_only)
{
     int i, n;

     http_header_dump(m->headers);

     debug("mms.dump", 0, "Dumping MMS message body (%s) [%ld parts] --> ", 
	   m->ismultipart ? "mulitpart" : "not multipart", 
	   m->ismultipart ? list_len(m->body.l) : 0);

     if (m->ismultipart)        
       for (i = 0, n = list_len(m->body.l); i< n; i++) {
	 MIMEEntity *x = list_get(m->body.l, i);
	 debug("mms.dump", 0, "--->Message part: %d --->", i);
	 
	 _x_mime_entity_dump(x,0,headers_only);
       }
     else if (!headers_only) 
       octstr_dump(m->body.s, 0);
     
}

Octstr *mms_tobinary(MmsMsg *msg)
{
     Octstr *s = octstr_create("");

     encode_msgheaders(s, msg);
     
     if (msg->body.s)
	  encode_msgbody(s, msg);
     return s;
}

int mms_messagetype(MmsMsg *msg)
{
  return msg->message_type;
}


static void convert_mime_msg(MIMEEntity *m)
{
     int i, n;
     Octstr *content_type, *params;
     char *s = NULL;
     
     get_content_type(m->headers, &content_type, &params);
     
     if (content_type) {
	  if (octstr_str_compare(content_type, 
				 "application/vnd.wap.multipart.related") == 0)
	       s = "multipart/related";
	  else if (octstr_str_compare(content_type, 
				      "application/vnd.wap.multipart.alternative") == 0)
	       s = "multipart/alternative";
	  else if (octstr_str_compare(content_type, 
				      "application/vnd.wap.multipart.mixed") == 0)
	       s = "multipart/mixed";
	  octstr_destroy(content_type);
     }
     if (s) {
	  Octstr *value;
	  
	  value = (params && octstr_len(params) > 0) ? 
	    octstr_format("%s; %S", s, params) : octstr_create(s);
	  
	  http_header_remove_all(m->headers, "Content-Type");
	  http_header_add(m->headers, "Content-Type", octstr_get_cstr(value));
	  

	  octstr_destroy(value);
     }
     
     if (params)
	  octstr_destroy(params);
     if (m->multiparts)
	  for (i = 0, n = list_len(m->multiparts); i < n; i++) 	 
	       convert_mime_msg(list_get(m->multiparts, i));	       
     
}

static void unconvert_mime_msg(MIMEEntity *m)
{
     int i, n;
     Octstr *content_type, *params; 
     char *s = NULL;

     get_content_type(m->headers, &content_type, &params);

     if (content_type) {
	  if (octstr_case_compare(content_type, 
				 octstr_imm("multipart/related")) == 0)
	       s = "application/vnd.wap.multipart.related";
	  else if (octstr_case_compare(content_type, 
				      octstr_imm("multipart/alternative")) == 0)
	       s = "application/vnd.wap.multipart.alternative";
	  else if (octstr_case_compare(content_type, 
				      octstr_imm("multipart/mixed")) == 0)
	       s = "application/vnd.wap.multipart.mixed";
	  octstr_destroy(content_type);
     }
     if (s) {
	  Octstr *value;
	  if (params) {
	       List *h = get_value_parameters(params);
	       Octstr *ps;
	       http_header_remove_all(h,"boundary"); /* We  don't need the boundary param if it is there. */
	       ps = make_value_parameters(h);
	       
	       value = octstr_format("%s%s%S", s, 
				     (ps && octstr_len(ps) > 0) ? "; " : "", 
				     ps);
	       octstr_destroy(ps);
	       http_destroy_headers(h);
	  } else 
	       value =  octstr_create(s);
	  
	  http_header_remove_all(m->headers, "Content-Type");
	  http_header_add(m->headers, "Content-Type", octstr_get_cstr(value));

	  octstr_destroy(value);
     }
     
     if (params)
	  octstr_destroy(params);

     if (m->multiparts && list_len(m->multiparts) > 0)
	  for (i = 0, n = list_len(m->multiparts); i < n; i++) 	 
	       unconvert_mime_msg(list_get(m->multiparts, i));	       
     
}

static MIMEEntity *mime_entity_duplicate(MIMEEntity *m)
{
     MIMEEntity *mx = gw_malloc(sizeof *mx);     

     mx->headers = http_header_duplicate(m->headers);     
     if (m->multiparts && list_len(m->multiparts) > 0) {
	  int i, n;
	  mx->multiparts = list_create();
	  for (i = 0, n = list_len(m->multiparts); i < n; i++) {
	       MIMEEntity *x  = mime_entity_duplicate(list_get(m->multiparts, i));
	       list_append(mx->multiparts, x);
	  }
	  mx->body = NULL;
     } else {
	  mx->body = m->body ? octstr_duplicate(m->body) : NULL;	       
	  mx->multiparts = NULL;
     }
     mx->start = NULL;

     return mx;	       
}

MIMEEntity *mms_tomime(MmsMsg *msg)
{
     MIMEEntity *m = gw_malloc(sizeof *m);
     int i, n;
     
     memset(m, 0, sizeof *m);
     m->body = NULL;
     m->multiparts = NULL;
     m->start = NULL;
     m->headers = http_header_duplicate(msg->headers);
     
     if (!msg->ismultipart)
	  m->body = msg->body.s ? octstr_duplicate(msg->body.s) : NULL;
     else {
	  m->multiparts = list_create();
	  for (i = 0, n = list_len(msg->body.l); i < n; i++) {
	       MIMEEntity *mx = mime_entity_duplicate(list_get(msg->body.l, i));	       
	       list_append(m->multiparts, mx);
	  }	  
     }
     convert_mime_msg(m);

     return m;
}

MmsMsg *mms_frommime(MIMEEntity *mime)
{
     MmsMsg *m = gw_malloc(sizeof *m);
     Octstr *s;
     MIMEEntity *mx;
     
     memset(m, 0, sizeof *m);

     mx = mime_entity_duplicate(mime);
     unconvert_mime_msg(mx); /* Fix-up content type issues. */
     unpack_mimeheaders(mx);
     unbase64_mimeparts(mx);
     
     m->headers = mx->headers;
     
     if (mx->multiparts && list_len(mx->multiparts) > 0) {
	  m->ismultipart  = 1;	  
	  m->body.l = mx->multiparts;	  
     } else {
	  m->ismultipart  = 0;	  
	  m->body.s = mx->body ? mx->body : octstr_imm("");
     } 

     gw_free(mx); /* Because all its bits are used above. XXX not very clean! */
     /* Now check for important headers. If missing, put them in */
     m->msgId = http_header_value(m->headers, octstr_imm("Message-ID"));          
     
     /* Default type is send */
     if ((s = http_header_value(m->headers, octstr_imm("X-Mms-Message-Type"))) == NULL) {
	  http_header_add(m->headers, "X-Mms-Message-Type", 
			  mms_message_type_to_cstr(MMS_MSGTYPE_SEND_REQ));
	  m->message_type = MMS_MSGTYPE_SEND_REQ;
     } else {
	  m->message_type = mms_string_to_message_type(s);
	  if (m->message_type < 0) {
	       error(0, "Unknown message type: %s while parsing mime entity.", octstr_get_cstr(s));
	       octstr_destroy(s);
	       goto failed;
	  }
	  octstr_destroy(s);
     }

     if ((s = http_header_value(m->headers, octstr_imm("X-Mms-MMS-Version"))) == NULL)
	  http_header_add(m->headers, "X-Mms-MMS-Version", MMS_VERSION);
     else
	  octstr_destroy(s);    	
     
     /* Fix-up date string: Put it in GMT format, since it might not be. */
     if ((s = http_header_value(m->headers, octstr_imm("Date"))) != NULL) {
	  struct tm xtm, ytm, *tm;
	  time_t t = time(NULL), t2;
	  char buf[64], *p, *q;
	  
	  http_header_remove_all(m->headers, "Date");
	  localtime_r(&t, &xtm); /* Initialise it. */

	  strptime(octstr_get_cstr(s), "%a, %d %b %Y %T %z", &xtm); /* Parse date value with time zone. */

	  t2 = gw_mktime(&xtm); /* Convert to unix time... */
	  tm = gmtime_r(&t2, &ytm); /* Then convert to GM time. */
	  
	  if (!tm || asctime_r(tm, buf) == NULL) /* Then convert to ascii. If that fails...*/
	       ctime_r(&t, buf);                 /* .. just use current time. */
	  
	  /* Strip leading and trailing blanks. */
	  for (p = buf; *p && p < buf + sizeof buf; p++)
	    if (!isspace(*p))
	      break;
	  q = p + (strlen(p) - 1);
	  while (isspace(*q) && q > p)
	    *q-- = 0;
	  
	  http_header_add(m->headers, "Date", p);
	  octstr_destroy(s);
	  
       
     }
     /* XXXX Probably ought to handle some more headers here: 
      * Return-Receipt-To becomes Read request is yes
      * Disposition-Notification-To: becomes X-Mms-Delivery-Report = Yes
      */

     /* XXXX Also need to validate this message a bit better. */
     fixup_msg(m, octstr_imm("anon@unknown"));

     return m;

 failed:
     mms_destroy(m);
     return NULL;
}

static void mm_destroy(MIMEEntity *mx)
{
     http_destroy_headers(mx->headers);
     if (mx->body) 
	  octstr_destroy(mx->body);
     else if (mx->multiparts) 
	  list_destroy(mx->multiparts, (list_item_destructor_t *)mm_destroy);
     gw_free(mx);
}

void mms_destroy(MmsMsg *msg)
{

     if (msg->ismultipart) 
	  list_destroy(msg->body.l, (list_item_destructor_t *)mm_destroy);     
     else if (msg->body.s)
	  octstr_destroy(msg->body.s);
     http_destroy_headers(msg->headers);
     octstr_destroy(msg->msgId);
     gw_free(msg);
}

List *mms_message_headers(MmsMsg *msg)
{

     return http_header_duplicate(msg->headers);
}

MmsMsg *mms_deliveryreport(Octstr *msgid, Octstr *to, time_t date, Octstr *status)
{

     MmsMsg *m = gw_malloc(sizeof *m);
     Octstr *s;

          
     m->ismultipart = 0;
     m->headers = http_create_empty_headers();

     m->message_type = MMS_MSGTYPE_DELIVERY_IND;
     m->body.s = NULL;
     m->msgId = octstr_duplicate(msgid);
     
     /* Now append headers. */
     
     http_header_add(m->headers, "X-Mms-Message-Type", "m-delivery-ind");
     http_header_add(m->headers, "X-Mms-MMS-Version", MMS_VERSION);
     http_header_add(m->headers, "Message-ID", octstr_get_cstr(msgid));
     http_header_add(m->headers, "To", octstr_get_cstr(to));
     
     s = date_format_http(date);
     http_header_add(m->headers, "Date", octstr_get_cstr(s));
     
     http_header_add(m->headers, "X-Mms-Status", octstr_get_cstr(status));
     
     octstr_destroy(s);

     return m;
}

MmsMsg *mms_notification(MmsMsg *msg, unsigned int msize, Octstr *url, 
			 Octstr *transactionid, time_t expiryt)
{
     MmsMsg *m = gw_malloc(sizeof *m);
     char buf[10];

     time_t tnow = time(NULL);
     
     m->ismultipart = 0;
     m->msgId = NULL;
     m->body.s = NULL;
     m->headers = http_create_empty_headers();
     m->message_type = MMS_MSGTYPE_NOTIFICATION_IND;
     
     http_header_add(m->headers, "X-Mms-Message-Type", "m-notification-ind");
     http_header_add(m->headers, "X-Mms-Transaction-ID", 
		     octstr_get_cstr(transactionid));
     http_header_add(m->headers, "X-Mms-MMS-Version", MMS_VERSION);


#define HX(h,d) do {\
        Octstr *s = http_header_value(msg->headers, octstr_imm(#h)); \
        if (s) { \
          http_header_add(m->headers, #h, octstr_get_cstr(s)); \
          octstr_destroy(s); \
        } else if (d) \
          http_header_add(m->headers, #h, d); \
       } while(0)

     HX(From,NULL);
     HX(Subject,NULL);
     HX(X-Mms-Message-Class, "Personal");
#undef HX
     
     sprintf(buf, "%d", msize);
     http_header_add(m->headers, "X-Mms-Message-Size", buf);
     
#define LARGET 365*24*3600

     sprintf(buf, "%ld", expiryt ? expiryt - tnow : LARGET);
     http_header_add(m->headers, "X-Mms-Expiry", buf);


    /* No reply charge stuff for now. */     
    
     http_header_add(m->headers, "X-Mms-Content-Location", octstr_get_cstr(url));
     
     return m;
}

MmsMsg *mms_retrieveconf(MmsMsg *msg, Octstr *transactionid, 
			 char *err, char *errtxt, Octstr *opt_from)
{
     MmsMsg *m;


     if (msg) {
	  if (msg->message_type == MMS_MSGTYPE_RETRIEVE_CONF)
	       return msg; /* Unchanged. XXX should we copy it instead?!! */
	  
	  if (msg->message_type != MMS_MSGTYPE_SEND_REQ)
	       return NULL;
     }

     m  = gw_malloc(sizeof *m);
     m->msgId = msg ? octstr_duplicate(msg->msgId) : NULL;

     m->headers = http_create_empty_headers();
     m->message_type = MMS_MSGTYPE_RETRIEVE_CONF;
     
     http_header_add(m->headers, "X-Mms-Message-Type", "m-retrieve-conf");
     if (transactionid)
	  http_header_add(m->headers, "X-Mms-Transaction-ID", 
			  octstr_get_cstr(transactionid));
     http_header_add(m->headers, "X-Mms-MMS-Version", MMS_VERSION);

     if (!msg) {	  
	  Octstr *x = date_format_http(time(NULL));

	  m->ismultipart = 0;
	  
	  http_header_add(m->headers, "Date", octstr_get_cstr(x));
	  http_header_add(m->headers, "X-Mms-Retrieve-Status",err);
	  if (err) 
	       http_header_add(m->headers, "X-Mms-Retrieve-Text",err);
	  if (opt_from)
	       http_header_add(m->headers, "From", octstr_get_cstr(opt_from));
	  http_header_add(m->headers, "Content-Type", "text/plain");
	  
	  if (errtxt)
	       m->body.s = octstr_create(errtxt);
	  else
	       m->body.s = octstr_create(" ");

	  octstr_destroy(x);	  
     } else { /* Otherwise copy from message. */
	  List *h = mms_message_headers(msg);
	  int i, n;

#if 0	  /* Some phones do not like this header! */
	  http_header_add(m->headers, "X-Mms-Retrieve-Status", "Ok");
#endif

	  http_header_combine(h, m->headers);	  
	  http_destroy_headers(m->headers);
	  m->headers = h;
	  
	  m->ismultipart = msg->ismultipart;

	  if (!m->ismultipart)
	       m->body.s = octstr_duplicate(msg->body.s);
	  else 
	       /* Body is a list of MIMEEntities, so recreate it. */
	       
	       for (m->body.l = list_create(), i = 0, 
			 n = list_len(msg->body.l); 
		    i<n; i++) 
		    list_append(m->body.l, 
				mime_entity_duplicate(list_get(msg->body.l, i)));
     }
     return m;
}

int mms_remove_headers(MmsMsg *m, char *name)
{
     http_header_remove_all(m->headers, name);

     return 0;
}

MmsMsg *mms_sendconf(char *errstr, char *msgid, char *transid, int isforward)
{
     MmsMsg *m = gw_malloc(sizeof *m);

     
     m->ismultipart = 0;
     m->msgId = msgid ? octstr_create(msgid) : NULL;
     m->body.s = NULL;

     m->headers = http_create_empty_headers();

     if (!isforward) {
	  m->message_type = MMS_MSGTYPE_SEND_CONF;	  
	  http_header_add(m->headers, "X-Mms-Message-Type", "m-send-conf");
     } else {
	  m->message_type = MMS_MSGTYPE_FORWARD_CONF;	  
	  http_header_add(m->headers, "X-Mms-Message-Type", "m-forward-conf");
     }
     http_header_add(m->headers, "X-Mms-Transaction-ID", transid);
     http_header_add(m->headers, "X-Mms-MMS-Version", MMS_VERSION);
     
     http_header_add(m->headers, "X-Mms-Response-Status", errstr);
     
     if (msgid)
	  http_header_add(m->headers, "Message-ID", msgid);

     return m;
}


int mms_replace_header_value(MmsMsg *msg, char *hname, char *value)
{
     
     http_header_remove_all(msg->headers, hname);

     http_header_add(msg->headers, hname, value);
     return 0;
}

Octstr *mms_get_header_value(MmsMsg *msg, Octstr  *header)
{
     
     return http_header_value(msg->headers, header);
     
}


int mms_convert_readrec2readorig(MmsMsg *msg)
{
     if (msg->message_type != MMS_MSGTYPE_READ_REC_IND)
	  return -1;
     
     mms_replace_header_value(msg, "X-Mms-Message-Type", "m-read-orig-ind");
     msg->message_type = MMS_MSGTYPE_READ_ORIG_IND;
     return 0;
}