C++ parse_contact函数代码示例

/*! \brief
 * Parse the whole message and bodies of all header fields
 * that will be needed by registrar
 */
int parse_message_for_register(struct sip_msg* _m) {
	struct hdr_field* ptr;

	if (parse_headers(_m, HDR_EOH_F, 0) == -1) {
		rerrno = R_PARSE;
		LM_ERR("failed to parse headers\n");
		return -1;
	}

	if (!_m->to) {
		rerrno = R_TO_MISS;
		LM_ERR("To not found\n");
		return -2;
	}

	if (!_m->callid) {
		rerrno = R_CID_MISS;
		LM_ERR("Call-ID not found\n");
		return -3;
	}

	if (!_m->cseq) {
		rerrno = R_CS_MISS;
		LM_ERR("CSeq not found\n");
		return -4;
	}

	if (_m->expires && !_m->expires->parsed
			&& (parse_expires(_m->expires) < 0)) {
		rerrno = R_PARSE_EXP;
		LM_ERR("failed to parse expires body\n");
		return -5;
	}

	if (_m->contact) {
		ptr = _m->contact;
		while (ptr) {
			if (ptr->type == HDR_CONTACT_T) {
				if (!ptr->parsed && (parse_contact(ptr) < 0)) {
					rerrno = R_PARSE_CONT;
					LM_ERR("failed to parse Contact body\n");
					return -6;
				}
			}
			ptr = ptr->next;
		}
	}

	return 0;
}

/*
 * Parse the whole message and bodies of all header fields
 * that will be needed by registrar
 */
int parse_message(struct sip_msg* _m)
{
	struct hdr_field* ptr;
	
	if (parse_headers(_m, HDR_EOH_F, 0) == -1) {
		rerrno = R_PARSE;
		LOG(L_ERR, "parse_message(): Error while parsing headers\n");
		return -1;
	}
	
	if (!_m->to) {
		rerrno = R_TO_MISS;
		LOG(L_ERR, "parse_message(): To not found\n");
		return -2;
	}

	if (!_m->callid) {
		rerrno = R_CID_MISS;
		LOG(L_ERR, "parse_message(): Call-ID not found\n");
		return -3;
	}

	if (!_m->cseq) {
		rerrno = R_CS_MISS;
		LOG(L_ERR, "parse_message(): CSeq not found\n");
		return -4;
	}

	if (_m->expires && !_m->expires->parsed && (parse_expires(_m->expires) < 0)) {
		rerrno = R_PARSE_EXP;
		LOG(L_ERR, "parse_message(): Error while parsing expires body\n");
		return -5;
	}
	
	if (_m->contact) {
		ptr = _m->contact;
		while(ptr) {
			if (ptr->type == HDR_CONTACT_T) {
				if (!ptr->parsed && (parse_contact(ptr) < 0)) {
					rerrno = R_PARSE_CONT;
					LOG(L_ERR, "parse_message(): Error while parsing Contact body\n");
					return -6;
				}
			}
			ptr = ptr->next;
		}
	}
	
	return 0;
}

    int
sca_get_msg_contact_uri( sip_msg_t *msg, str *contact_uri )
{
    contact_body_t	*contact_body;

    assert( msg != NULL );
    assert( contact_uri != NULL );

    if ( SCA_HEADER_EMPTY( msg->contact )) {
	LM_DBG( "Empty Contact header" );
	contact_uri->s = NULL;
	contact_uri->len = 0;

	return( 0 );
    }

    if ( parse_contact( msg->contact ) < 0 ) {
	LM_ERR( "Failed to parse Contact header: %.*s",
		STR_FMT( &msg->contact->body ));
	return( -1 );
    }
    if (( contact_body = (contact_body_t *)msg->contact->parsed ) == NULL ) {
	LM_ERR( "Invalid Contact header: %.*s", STR_FMT( &msg->contact->body ));
	return( -1 );
    }
    if ( contact_body->star ) {
	LM_ERR( "Invalid Contact header: SCA Contact must not be \"*\"" );
	return( -1 );
    }
    if ( contact_body->contacts == NULL ) {
	LM_ERR( "Invalid Contact header: parser found no contacts" );
	return( -1 );
    }
    if ( contact_body->contacts->next ) {
	LM_ERR( "Invalid Contact header: Contact may only contain one URI" );
	return( -1 );
    }

    contact_uri->s = contact_body->contacts->uri.s;
    contact_uri->len = contact_body->contacts->uri.len;

    return( 1 );
}

/**
 * Extract URI from the Contact header field
 * @param _m - the SIP message
 * @param uri - URI to fill
 * @param _c - contact to fill
 * @returns 0 on success, -1 on error
 */
static inline int get_contact_uri(struct sip_msg* _m, struct sip_uri *uri, contact_t** _c)
{

	if ((parse_headers(_m, HDR_CONTACT_F, 0) == -1) || !_m->contact)
		return -1;
	if (!_m->contact->parsed && parse_contact(_m->contact) < 0) {
		LOG(L_ERR, "get_contact_uri: Error while parsing Contact body\n");
		return -1;
	}
	*_c = ((contact_body_t*)_m->contact->parsed)->contacts;
	if (*_c == NULL) {
		LOG(L_DBG, "get_contact_uri: Error while parsing Contact body or star contact\n");
		return -1;
	}
	if (parse_uri((*_c)->uri.s, (*_c)->uri.len, uri) < 0 || uri->host.len <= 0) {
		LOG(L_ERR, "get_contact_uri: Error while parsing Contact URI\n");
		return -1;
	}
	return 0;
}

static inline void get_routing_info(struct sip_msg *msg, int is_req,
							unsigned int *skip_rrs, str *contact, str *rr_set)
{
	/* extract the contact address */
	if (!msg->contact&&(parse_headers(msg,HDR_CONTACT_F,0)<0||!msg->contact)){
		//LM_ERR("bad sip message or missing Contact hdr\n");
		contact->s = NULL;
		contact->len = 0;
	} else {
		if ( parse_contact(msg->contact)<0 ||
		((contact_body_t *)msg->contact->parsed)->contacts==NULL ||
		((contact_body_t *)msg->contact->parsed)->contacts->next!=NULL ) {
			LM_ERR("bad Contact HDR\n");
			contact->s = NULL;
			contact->len = 0;
		} else {
			*contact = ((contact_body_t *)msg->contact->parsed)->contacts->uri;
		}
	}

	/* extract the RR parts - parse all headers as we can have multiple 
	   RR headers in the same message */
	if( parse_headers(msg,HDR_EOH_F,0)<0 ){
		LM_ERR("failed to parse record route header\n");
		rr_set->s = 0;
		rr_set->len = 0;
	} else {
		if(msg->record_route){
			if( print_rr_body(msg->record_route, rr_set, !is_req,
								skip_rrs) != 0 ){
				LM_ERR("failed to print route records \n");
				rr_set->s = 0;
				rr_set->len = 0;
			}
		} else {
			rr_set->s = 0;
			rr_set->len = 0;
		}
	}
}

/*
 * Extract URI from the Contact header field
 */
int
get_contact_uri(struct sip_msg* _m, struct sip_uri *uri, contact_t** _c)
{

        if ((parse_headers(_m, HDR_CONTACT_F, 0) == -1) || !_m->contact)
                return -1;
        if (!_m->contact->parsed && parse_contact(_m->contact) < 0) {
                LM_ERR("failed to parse Contact body\n");
                return -1;
        }
        *_c = ((contact_body_t*)_m->contact->parsed)->contacts;
        if (*_c == NULL)
                /* no contacts found */
                return -1;

        if (parse_uri((*_c)->uri.s, (*_c)->uri.len, uri) < 0 || uri->host.len <= 0) {
                LM_ERR("failed to parse Contact URI [%.*s]\n",
                        (*_c)->uri.len, ((*_c)->uri.s)?(*_c)->uri.s:"");
                return -1;
        }
        return 0;
}

/*
 * Parse Contact header field body and extract URI
 * Does not parse headers !
 */
static inline int get_contact_uri(struct sip_msg* msg, str* uri)
{
	contact_t* c;

	uri->len = 0;
	if (!msg->contact) return 1;

	if (parse_contact(msg->contact) < 0) {
		LM_ERR("error while parsing Contact body\n");
		return -1;
	}

	c = ((contact_body_t*)msg->contact->parsed)->contacts;

	if (!c) {
		LM_ERR("empty body or * contact\n");
		return -2;
	}

	*uri = c->uri;
	return 0;
}

//#define DEBUG
int
encode_contact (struct sip_msg *msg, char *encoding_prefix,char *public_ip)
{

	contact_body_t *cb;
	contact_t *c;
	str uri;
	str newUri;
	int res;
	char separator;



	/*
	 * I have a list of contacts in contact->parsed which is of type contact_body_t 
	 * inside i have a contact->parsed->contact which is the head of the list of contacts
	 * inside it is a 
	 * str uri;
	 * struct contact *next;
	 * I just have to visit each uri and encode each uri according to a scheme
	 */
	
	if ((msg->contact == NULL)&&((parse_headers(msg,HDR_CONTACT_F,0) == -1) ||
				(msg->contact == NULL) ))
		{
		LM_ERR("no Contact header present\n");
		return -1;
		}


	separator = DEFAULT_SEPARATOR[0];
	if (contact_flds_separator != NULL)
		if (strlen(contact_flds_separator)>=1)
			separator = contact_flds_separator[0];

	if (msg->contact->parsed == NULL)	parse_contact (msg->contact);
	if (msg->contact->parsed != NULL)
	{
		cb = (contact_body_t *) msg->contact->parsed;
		c = cb->contacts;
		/* we visit each contact */
		if (c != NULL)
		{
			uri = c->uri;
			res = encode_uri (uri, encoding_prefix, public_ip,separator, &newUri);
			
			if (res != 0)
				{
				LM_ERR("failed encoding contact.Code %d\n", res);
#ifdef STRICT_CHECK
				return res;
#endif
				}
			else
				if (patch (msg, uri.s, uri.len, newUri.s, newUri.len) < 0)
				{
					LM_ERR("lumping failed in mangling port \n");
					return -2;
				}
			
			/* encoding next contacts too?*/
#ifdef ENCODE_ALL_CONTACTS
			while (c->next != NULL)
			{
				c = c->next;
				uri = c->uri;
				
				res = encode_uri (uri, encoding_prefix,public_ip,separator,&newUri);
				if (res != 0)
					{
					LM_ERR("failed encode_uri.Code %d\n",res);
#ifdef STRICT_CHECK
				return res;
#endif
					}
				else
				if (patch (msg, uri.s, uri.len, newUri.s, newUri.len)< 0)
				{
					LM_ERR("lumping failed in mangling port \n");
					return -3;
				}
			} /* while */
#endif /* ENCODE_ALL_CONTACTS */
		} /* if c != NULL */

	} /* end if */
	else /* after parsing still NULL */
		{
			LM_ERR("unable to parse Contact header\n");
			return -4;
		}
	return 1;
}

int
decode_contact_header (struct sip_msg *msg,char *unused1,char *unused2)
{

	contact_body_t *cb;
	contact_t *c;
	str uri;
	str newUri;
	char separator;
	int res;
	
	
#ifdef DEBUG
	str* ruri;
	fprintf (stdout,"---START--------DECODE CONTACT HEADER-----------------\n");
#endif

	if ((msg->contact == NULL)&&((parse_headers(msg,HDR_CONTACT_F,0) == -1) ||
				(msg->contact== NULL) ))
		{
		LM_ERR("no Contact header present\n");
		return -1;
		}

	separator = DEFAULT_SEPARATOR[0];
	if (contact_flds_separator != NULL)
		if (strlen(contact_flds_separator)>=1)
			separator = contact_flds_separator[0];

#ifdef DEBUG
	fprintf (stdout,"Using separator %c\n",separator);
	ruri = GET_RURI(msg);
	fprintf (stdout,"[len = %d]New uri is->%.*s\n",
			ruri->len,ruri->len,ruri->s);
	ruri = &msg->first_line.u.request.uri;
	fprintf (stdout, "INITIAL.s=[%.*s]\n", ruri->len, ruri->s);
#endif
		
	if (msg->contact->parsed == NULL) parse_contact (msg->contact);
	if (msg->contact->parsed != NULL)
	{
		cb = (contact_body_t *) msg->contact->parsed;
		c = cb->contacts;
		// we visit each contact 
	 if (c != NULL)
	  {
		uri = c->uri;

		res = decode_uri (uri, separator, &newUri);
#ifdef DEBUG
		fprintf (stdout, "newuri.s=[%.*s]\n", newUri.len, newUri.s);
#endif
		if (res != 0)
		{
			LM_ERR("failed decoding contact.Code %d\n", res);
#ifdef STRICT_CHECK
				return res;
#endif
		}
		else
		if (patch (msg, uri.s, uri.len, newUri.s, newUri.len) < 0)
		{
			LM_ERR("lumping failed in mangling port \n");
			return -2;
		}

#ifdef DECODE_ALL_CONTACTS
		while (c->next != NULL)
		{
			c = c->next;
			uri = c->uri;

			res = decode_uri (uri, separator, &newUri);
			if (res != 0)
				{
				LM_ERR("failed decoding contact.Code %d\n",res);
#ifdef STRICT_CHECK
				return res;
#endif
				}
			else
			if (patch (msg, uri.s, uri.len, newUri.s, newUri.len) < 0)
			{
				LM_ERR("lumping failed in mangling port \n");
				return -3;
			}
		} // end while 
#endif
	   } // if c!= NULL 
	} // end if 
	else // after parsing still NULL 
		{
			LM_ERR("unable to parse Contact header\n");
			return -4;
		}
#ifdef DEBUG
	fprintf (stdout,"---END--------DECODE CONTACT HEADER-----------------\n");fflush(stdout);
#endif
	return 1;
}

//.........这里部分代码省略.........

			if(hentity->desired_expires== 0)
				subs.expires= -1;
			else
			if(hentity->desired_expires< (int)time(NULL))
				subs.expires= 0;
			else
				subs.expires= hentity->desired_expires- (int)time(NULL)+ 3;

			subs.flag= INSERT_TYPE;
			subs.source_flag= flag;
			subs.event= hentity->event;
			subs.id= hentity->id;
			subs.outbound_proxy= hentity->outbound_proxy;
			subs.extra_headers= &hentity->extra_headers;
			subs.cb_param= hentity->cb_param;

			if(send_subscribe(&subs)< 0)
			{
				LM_ERR("when trying to send SUBSCRIBE\n");
				goto done;
			}
		}
		goto done;
	}
	/*if a 2XX reply handle the two cases- an existing dialog and a new one*/

	/* extract the contact */
	if(msg->contact== NULL || msg->contact->body.s== NULL)
	{
		LM_ERR("no contact header found");
		goto error;
	}
	if( parse_contact(msg->contact) <0 )
	{
		LM_ERR(" cannot parse contact header\n");
		goto error;
	}

	if(msg->contact->parsed == NULL)
	{
		LM_ERR("cannot parse contact header\n");
		goto error;
	}
	contact = ((contact_body_t* )msg->contact->parsed)->contacts->uri;

	if(!initial_request)
	{
		/* do not delete the dialog - allow Notifies to be recognized as
		 * inside a known dialog */
	        if (lexpire == 0)
	                lexpire = 5;

		LM_DBG("*** Update expires\n");
		update_htable(hentity->hash_index, hentity->local_index, lexpire, NULL, &contact);
		goto done;
	}

	/* if a new dialog -> insert */
	if(lexpire== 0)
	{
		LM_DBG("expires= 0: no not insert\n");
		goto done;
	}

	if( msg->cseq==NULL || msg->cseq->body.s==NULL)

int dlg_replace_contact(struct sip_msg* msg, struct dlg_cell* dlg)
{
	struct lump* lump, *crt, *prev_crt =0, *a, *foo;
	int offset;
	int len,n;
	char *prefix=NULL,*suffix=NULL,*p,*p_init,*ct_username=NULL;
	int prefix_len,suffix_len,ct_username_len=0;
	struct sip_uri ctu;
	str contact;

	if(!msg->contact)
	{
		if(parse_headers(msg, HDR_CONTACT_F, 0)< 0)
		{
			LM_ERR("Failed to parse headers\n");
			return -1;
		}
		if(!msg->contact)
			return 0;
	}

	prefix_len = 5; /* <sip: */

	if (dlg->flags & DLG_FLAG_TOPH_KEEP_USER) {
		if ( parse_contact(msg->contact)<0 ||
			((contact_body_t *)msg->contact->parsed)->contacts==NULL ||
			((contact_body_t *)msg->contact->parsed)->contacts->next!=NULL ) {
				LM_ERR("bad Contact HDR\n");
		} else {
			contact = ((contact_body_t *)msg->contact->parsed)->contacts->uri;
			if(parse_uri(contact.s, contact.len, &ctu) < 0) {
				LM_ERR("Bad Contact URI\n");
			} else {
				ct_username = ctu.user.s;
				ct_username_len = ctu.user.len;
				LM_DBG("Trying to propagate username [%.*s]\n",ct_username_len,
									ct_username);
				if (ct_username_len > 0)
					prefix_len += 1 + /* @ */ + ct_username_len;
			}
		}
	}

	prefix = pkg_malloc(prefix_len);
	if (!prefix) {
		LM_ERR("no more pkg\n");
		goto error;
	}

	suffix_len = RR_DLG_PARAM_SIZE+1; /* > */
	suffix = pkg_malloc(suffix_len);
	if (!suffix) {
		LM_ERR("no more pkg\n");
		goto error;
	}

	memcpy(prefix,"<sip:",prefix_len);
	if (dlg->flags & DLG_FLAG_TOPH_KEEP_USER && ct_username_len > 0) {
		memcpy(prefix+5,ct_username,ct_username_len);
		prefix[prefix_len-1] = '@';
	}

	p_init = p = suffix;
	*p++ = ';';
	memcpy(p,rr_param.s,rr_param.len);
	p+=rr_param.len;
	*p++ = '=';

	n = RR_DLG_PARAM_SIZE - (p-p_init);
	if (int2reverse_hex( &p, &n, dlg->h_entry)==-1)
		return -1;

	*(p++) = DLG_SEPARATOR;

	n = RR_DLG_PARAM_SIZE - (p-p_init);
	if (int2reverse_hex( &p, &n, dlg->h_id)==-1)
		return -1;

	*p++ = '>';
	suffix_len = p - p_init;

	offset = msg->contact->body.s - msg->buf;
	len = msg->contact->body.len;

	for (crt = msg->add_rm;crt;) {
		if (crt->type == HDR_CONTACT_T && crt->op == LUMP_DEL &&
				crt->u.offset >= offset && crt->u.offset <= offset + len) {
			lump = crt;
			crt = crt->next;
			a=lump->before;
			while(a) {
				LM_DBG("before [%p], op=%d\n", a, a->op);
				if(a->op == LUMP_ADD)
					LM_DBG("value= %.*s\n", a->len, a->u.value);
				foo=a; a=a->before;
				if (!(foo->flags&(LUMPFLAG_DUPED|LUMPFLAG_SHMEM)))
					free_lump(foo);
				if (!(foo->flags&LUMPFLAG_SHMEM))
					pkg_free(foo);
			}
//.........这里部分代码省略.........

void reg_tm_cback(struct cell *t, int type, struct tmcb_params *ps)
{
	struct sip_msg *msg;
	reg_tm_cb_t *cb_param;
	int statuscode = 0;
	unsigned int exp = 0;
	reg_record_t *rec;
	struct hdr_field *c_ptr, *head_contact;
	struct uac_credential crd;
	contact_t *contact;
	struct authenticate_body *auth = NULL;
	static struct authenticate_nc_cnonce auth_nc_cnonce;
	HASHHEX response;
	str *new_hdr;
	time_t now;

	if(ps==NULL || ps->rpl==NULL) {
		LM_ERR("wrong ps parameter\n");
		return;
	}
	if(ps->param==NULL || *ps->param==NULL) {
		LM_ERR("null callback parameter\n");
		return;
	}
	cb_param = (reg_tm_cb_t *)*ps->param;
	if(cb_param->uac == NULL) {
		LM_ERR("null record\n");
		return;
	}
	statuscode = ps->code;
	now = time(0);
	LM_DBG("tm [%p] notification cb for %s [%d] reply at [%d]\n",
			t, (ps->rpl==FAKED_REPLY)?"FAKED_REPLY":"", statuscode, (unsigned int)now);

	if(statuscode<200) return;

	lock_get(&reg_htable[cb_param->hash_index].lock);
	rec = reg_htable[cb_param->hash_index].first;
	while(rec) {
		if (rec==cb_param->uac) {
			break;
		}
		rec = rec->next;
	}
	if(!rec) {
		LM_ERR("record [%p] not found on hash index [%d]\n",
		cb_param->uac, cb_param->hash_index);
		lock_release(&reg_htable[cb_param->hash_index].lock);
		return;
	}
	reg_print_record(rec);

	switch(statuscode) {
	case 200:
		msg = ps->rpl;
		if(msg==FAKED_REPLY) {
			LM_ERR("FAKED_REPLY\n");
			goto done;
		}
		if (parse_headers(msg, HDR_EOH_F, 0) == -1) {
			LM_ERR("failed to parse headers\n");
			goto done;
		}
		if (msg->contact) {
			c_ptr = msg->contact;
			while(c_ptr) {
				if (c_ptr->type == HDR_CONTACT_T) {
					if (!c_ptr->parsed && (parse_contact(c_ptr)<0)) {
						LM_ERR("failed to parse Contact body\n");
						goto done;
					}
				}
				c_ptr = c_ptr->next;
			}
		} else {
			LM_ERR("No contact header in received 200ok\n");
			goto done;
		}
		head_contact = msg->contact;
		contact = ((contact_body_t*)msg->contact->parsed)->contacts;
		while (contact) {
			/* Check for binding */
			if (contact->uri.len==rec->contact_uri.len &&
				strncmp(contact->uri.s,rec->contact_uri.s,contact->uri.len)==0){
				if (contact->expires && contact->expires->body.len) {
					if (str2int(&contact->expires->body, &exp)<0) {
						LM_ERR("Unable to extract expires from [%.*s]"
							" for binding [%.*s]\n",
							contact->expires->body.len,
							contact->expires->body.s,
							contact->uri.len, contact->uri.s);
					} else {
						rec->expires = exp;
					}
				}
				break;
			}
					
			/* get the next contact */
			if (contact->next == NULL) {
//.........这里部分代码省略.........

static int l_siplua_getContact(lua_State *L)
{
  struct sipapi_object *o;
  struct hdr_field *_p;
  contact_t *_c;
  int n = 1;
  int found_hf_no_star = 0;
  int found_hf_star = 0;
  int expires;

  o = luaL_checkudata(L, 1, "siplua.api");
  if (!o->msg->contact)
    {
      lua_pushnil(L);
      return 1;
    }
  lua_newtable(L);
  _p = o->msg->contact;
  for (_p = o->msg->contact; _p; _p = _p->next)
    {
/*       siplua_log(L_DBG, "l_siplua_getContact _p/%p", _p); */
      if (_p->type == HDR_CONTACT_T)
	{
	  if (parse_contact(_p) < 0)
	    {
	      return luaL_error(L, "failed to parse Contact body");
	    }
	  if (((contact_body_t *)_p->parsed)->star)
	    {
	      lua_pushinteger(L, n++);
	      lua_newtable(L);
	      lua_pushstring(L, "star");
	      lua_pushboolean(L, 1);
	      lua_rawset(L, -3);
	      lua_pushstring(L, "name");
	      lua_pushstring(L, "*");
	      lua_rawset(L, -3);
	      lua_pushstring(L, "uri");
	      lua_pushstring(L, "*");
	      lua_rawset(L, -3);
	      lua_rawset(L, -3);
	      found_hf_star = 1;
	    }
	  for (_c = ((contact_body_t *)_p->parsed)->contacts; _c; _c = _c->next)
	    {
/* 	  siplua_log(L_DBG, "l_siplua_getContact _c/%p", _c); */
	      if (!_c)
		break;
	      lua_pushinteger(L, n++);
	      lua_newtable(L);
	      lua_pushstring(L, "name");
	      lua_pushlstring(L, _c->name.s, _c->name.len);
	      lua_rawset(L, -3);
	      lua_pushstring(L, "uri");
	      lua_pushlstring(L, _c->uri.s, _c->uri.len);
	      lua_rawset(L, -3);
/* 	      siplua_log(L_DBG, "contact q/%p expires/%p", _c->q, _c->expires); */
	      if (_c->q)
		{
		  lua_pushstring(L, "q");
		  lua_pushlstring(L, _c->q->body.s, _c->q->body.len);
		  lua_pushnumber(L, lua_tonumber(L, -1));
		  lua_remove(L, -2);
		  lua_rawset(L, -3);
		}
	      if (_c->expires)
		{
		  lua_pushstring(L, "expires");
		  lua_pushlstring(L, _c->expires->body.s, _c->expires->body.len);
		  lua_pushnumber(L, lua_tonumber(L, -1));
		  lua_remove(L, -2);
		  lua_rawset(L, -3);
		}
	      lua_rawset(L, -3);
	      found_hf_no_star = 1;
	    }
	}
    }
  if (found_hf_star)
    {
      if (found_hf_no_star)
	{
	  lua_remove(L, -1);
	  lua_pushnil(L);
	  siplua_log(L_DBG, "l_siplua_getContact Found Contact HF with both star and no star.");
	}
      else
	{
/* 	  siplua_log(L_DBG, "BEFORE"); */
	  expires = sipapi_getExpires(o->msg);
/* 	  siplua_log(L_DBG, "AFTER"); */
	  if (expires != 0 && expires != -1)
	    {
	      lua_remove(L, -1);
	      lua_pushnil(L);
	      siplua_log(L_DBG, "l_siplua_getContact Found Contact HF star with unvalid expires.");
	    }
	}
    }
/*   siplua_log(L_DBG, "l_siplua_getContact returned."); */
//.........这里部分代码省略.........

/* returns : -1 - error
 *            0 - ok, but no contact added
 *            n - ok and n contacts added
 */
static int shmcontact2dset(struct sip_msg *req, struct sip_msg *sh_rpl,
								long max, struct acc_param *reason, unsigned int bflags)
{
	static struct sip_msg  dup_rpl;
	static contact_t *scontacts[MAX_CONTACTS_PER_REPLY];
	static qvalue_t  sqvalues[MAX_CONTACTS_PER_REPLY];
	struct hdr_field *hdr;
	struct hdr_field *contact_hdr;
	contact_t        *contacts;
	int n,i;
	int added;
	int dup;
	int ret;

	/* dup can be:
	 *    0 - sh reply but nothing duplicated 
	 *    1 - sh reply but only contact body parsed
	 *    2 - sh reply and contact header and body parsed
	 *    3 - private reply
	 */
	dup = 0; /* sh_rpl not duplicated */
	ret = 0; /* success and no contact added */
	contact_hdr = 0;

	if (sh_rpl==0 || sh_rpl==FAKED_REPLY)
		return 0;

	if (sh_rpl->contact==0) {
		/* contact header is not parsed */
		if ( sh_rpl->msg_flags&FL_SHM_CLONE ) {
			/* duplicate the reply into private memory to be able 
			 * to parse it and afterwards to free the parsed mems */
			memcpy( &dup_rpl, sh_rpl, sizeof(struct sip_msg) );
			dup = 2;
			/* ok -> force the parsing of contact header */
			if ( parse_headers( &dup_rpl, HDR_EOH_F, 0)<0 ) {
				LM_ERR("dup_rpl parse failed\n");
				ret = -1;
				goto restore;
			}
			if (dup_rpl.contact==0) {
				LM_DBG("contact hdr not found in dup_rpl\n");
				goto restore;
			}
			contact_hdr = dup_rpl.contact;
		} else {
			dup = 3;
			/* force the parsing of contact header */
			if ( parse_headers( sh_rpl, HDR_EOH_F, 0)<0 ) {
				LM_ERR("sh_rpl parse failed\n");
				ret = -1;
				goto restore;
			}
			if (sh_rpl->contact==0) {
				LM_DBG("contact hdr not found in sh_rpl\n");
				goto restore;
			}
			contact_hdr = sh_rpl->contact;
		}
	} else {
		contact_hdr = sh_rpl->contact;
	}

	/* parse the body of contact headers */
	hdr = contact_hdr;
	while(hdr) {
		if (hdr->type == HDR_CONTACT_T) {
			if (hdr->parsed==0) {
				if(parse_contact(hdr) < 0) {
					LM_ERR("failed to parse Contact body\n");
					ret = -1;
					goto restore;
				}
				if (dup==0)
					dup = 1;
				}
		}
		hdr = hdr->next;
	}

	/* we have the contact header and its body parsed -> sort the contacts
	 * based on the q value */
	contacts = ((contact_body_t*)contact_hdr->parsed)->contacts;
	if (contacts==0) {
		LM_DBG("contact hdr has no contacts\n");
		goto restore;
	}
	n = sort_contacts(contact_hdr, scontacts, sqvalues);
	if (n==0) {
		LM_DBG("no contacts left after filtering\n");
		goto restore;
	}

	i=0;

	/* more branches than requested in the parameter
//.........这里部分代码省略.........

/*
 * This function encodes an arbitrary header into a chunk of bytes,
 * ready to be sent to the Application Server.
 *
 * The header codes start with this encoded-bytes:
 * 2: SIP-MSG-START based pointer to the header (including header name)
 * 2: length of the header
 * 1: length of the header name
 */
int encode_header(struct sip_msg *sipmsg,struct hdr_field *hdr,unsigned char *payload,int paylen)
{
   int len=0;
   unsigned int integer,*methods=0;
   char *hdrstart,*tmp;
   unsigned short int ptr;
   struct to_body *tobody=0;
   struct via_body *viabody=0;
   struct cseq_body *cseqbody=0;
   char *msg,*myerror;
   int mlen;

   msg=sipmsg->buf;
   mlen=sipmsg->len;
   hdrstart = hdr->name.s;
   if(hdrstart-msg<0){
      LM_ERR("header(%.*s) does not belong to sip_msg(hdrstart<msg)\n",
			  hdr->name.len,hdr->name.s);
      return -1;
   }
   ptr=htons((short int)(hdrstart-msg));
   if((hdrstart-msg)>mlen){
      LM_ERR("out of the sip_msg bounds (%d>%d)\n",ntohs(ptr),mlen);
      return -1;
   }
   if(hdr->len>(1<<16)){
      LM_ERR("length of header too long\n");
      return -1;
   }
   memcpy(payload,&ptr,2);
   ptr=htons((short int)(hdr->len));
   memcpy(payload+HEADER_LEN_IDX,&ptr,2);
   payload[HEADER_NAME_LEN_IDX]=(unsigned char)hdr->name.len;
   switch(hdr->type){
      case HDR_FROM_T:
      case HDR_TO_T:
      case HDR_REFER_TO_T:
      case HDR_RPID_T:
	 if(!hdr->parsed){
	    if((tobody=pkg_malloc(sizeof(struct to_body)))==0){
	       myerror="Out of memory !!\n";
	       goto error;
	    }
	    parse_to(hdr->body.s,hdr->body.s+hdr->body.len+1,tobody);
	    if (tobody->error == PARSE_ERROR) {
	       myerror="bad (REFER,TO,FROM,RPID) header\n";
	       pkg_free(tobody);
	       return 5;
	       goto error;
	    }
	    hdr->parsed=(struct to_body*)tobody;
	 }else
	    tobody=(struct to_body*)hdr->parsed;
	 if((len=encode_to_body(hdr->name.s,hdr->len,tobody,payload+5))<0){
	    myerror="parsing from or to header\n";
	    goto error;
	 }else{
	    return 5+len;
	 }
	 break;
      case HDR_CONTACT_T:
	 if(!hdr->parsed)
	    if(parse_contact(hdr)<0){
	       myerror="parsing contact\n";
	       goto error;
	    }
	 if((len=encode_contact_body(hdr->name.s,hdr->len,(contact_body_t*)hdr->parsed,payload+5))<0){
	    myerror="encoding contact header\n";
	    goto error;
	 }else{
	    return 5+len;
	 }
	 break;
      case HDR_ROUTE_T:
      case HDR_RECORDROUTE_T:
	 if(!hdr->parsed)
	    if(parse_rr(hdr)<0){
	       myerror="encoding route or recordroute\n";
	       goto error;
	    }
	 if((len=encode_route_body(hdr->name.s,hdr->len,(rr_t*)hdr->parsed,payload+5))<0){
	    myerror="encoding route or recordroute header\n";
	    goto error;
	 }else{
	    return 5+len;
	 }
	 break;
      case HDR_CONTENTLENGTH_T:
	 if(!hdr->parsed){
	    tmp=parse_content_length(hdr->body.s,hdr->body.s+hdr->body.len+1,(int*)&integer);
	    if (tmp==0){
//.........这里部分代码省略.........