MMS协议解析.doc

_MMS协议解析MMS（Multimedia Messaging Service）就是我们俗称的彩信，它能提供比SMS（短信）更加丰富的信息，能提供包括图片、视频、声音、各种格式的文字等内容。目前的应用主要有以下几个方面： 便利性实用性娱乐性互动性个人化 端到端通信 自拍照片自编贺卡/图片 带有图片照片和语音片断等表达感情内容的增强型聊天 电子邮件附件在移动终端上的增强型应用 娱乐 手机铃声/屏保下载 节日贺卡明星贺卡 多媒体交友利用手机察看自己心仪的对象并通过信息向她表达心意 原创基地:利用多媒体短信传播自己的原创动漫和音乐 新闻/金融服务 体育比赛集锦和得分镜头视频剪辑 通过移动终端获取多媒体新闻和金融信息分析等 其他 定位业务 移动广告一、 数据流程MMS系统大致网络拓扑图如下：先介绍一下网络中的节点设备：MMS Client：MMS客户端，就是平常用的手机等移动设备；MMS Proxy Relay：MMS代理中继，用于转发MMS；MMS Server：MMS服务器，用于存储MMS，一般与MMS代理集成在一台设备上；Legacy Wireless Messaging Systems：传统的无线消息系统，比如SMS系统；Email Server：邮件服务器，Ineternet上的邮件服务器，比如139邮件服务器；Other MMS Systems：其他地方或其他运营商的MMS系统；MMS承载于WAP之上，在WAP1.x系统里采用WSP协议，在WAP2.0系统里采用HTTP协议，如下图所示：详细网络图如下：SGSNGGSNMSCISMGSMSGWAP GWMMS终端1MMS终端2SPE-mail ServerMMSCMMSCBSBS核心网IP网InternetMMS的发送接收实体包括如下几种方式：1、 终端同一系统内终端2、 终端不同系统内终端3、 终端Email server4、 终端SP我们以第一种情况进行MMS收发流程说明，大致有以下几步：1、 发送终端发送MMS到MMS代理；2、 MMS代理发送通知到接收终端；3、 接收终端发送提取MMS命令到MMS代理；4、 MMS代理返回MMS到接收终端；5、 MMS代理发送回执给发送终端，表示对方已收到MMS；其中第2步的通知是通过WAP PUSH实现的，目前中国移动实现的方式是通过SMS（短信）通知对方。二、 消息解析前面提到MMS可以通过wsp和http两种方式传输，无论哪种方式，其Content-Type都必须为application/vnd.wap.mms-message（0x3E）。MMS可以分为4类：发送、通知、提取、回执。每一类消息都包含消息头，有的还包含正文。如下：2.1 发送发送是指发送者发送MMS到MMS中心，包括两条消息：MMS发送请求、MMS发送确认。2.1.1 MMS发送请求MMS发送请求消息由发送者到MMS中心，包含消息头和正文，正文紧跟消息头。消息头包含内容如下：NameContentCommentsX-Mms -Message-TypeMessage-type-value =m-send-reqMandatory.Specifies the transaction type.X-Mms -Transactio n-IDTransaction-id-valueMandatory.A unique identifier for the message. This transaction ID identifies the M -Send.req and the corresponding reply only.X-Mms -MMS-VersionMMS-version-valueMandatory.The MMS version number. According to this specificatio n, the version is 1.0DateDate-valueOptional.Arrival time of the message at MMSProxy -Relay. MMS Proxy -Relaywill generate this field when not supplied by terminal.FromFrom-valueMandatory.Address of the message sender. This field MUST be present in a message delivered to a recipient. The sending client MUST send either its address or insert -an- address token. In case of token, the MMS Proxy -Relay MUST insert the correct address of the sender.ToTo-valueOptional1.Address of the recipient.CcCc-valueOptional1.Address of the recipient. Addressing is handled inChapter 8.Any number of address fields allowed.BccBcc-valueOptional1.Address of the recipient. Addressing is handled inChapter 8.Any number of address fields allowed.SubjectSubject-valueOptional.Subject of the message.X-Mms -Message-ClassMessage-class -valueOptional.Class of the message. Value Auto indicates a message that is automatically generated by the client. If the Message-Class is Auto, the originating terminal SHALL NOT request Delivery -Report or Read-Report.If field is not present, the receiver inteprets the message as personal.X-Mms -ExpiryExpiry -valueOptional, default: maximum.Length of time the message will be stored in MMSProxy -Relayor time to delete the message. The field has two formats, either absolute or interval.X-Mms -Delivery -TimeDelivery -time -valueOptional: default: immedia te.Time of desired delivery. Indicates the earliest possible delivery of the message to the recipient. The field has two formats, either absolute or interval.X-Mms -PriorityPriority-valueOptional. Default: Normal.Priority of the message for the recip ient.X-Mms -Sender- VisibilitySender-visibility-valueOptional. Default: show address/phone number of the sender to the recipient unless the sender has a secret number/address.Hide = dont show any address. Show = show even secret address.X-Mms -Delivery- ReportDelivery -report -valueOptional. Default determined when service is ordered. Specifies whether the user wants a delivery report from each recipient. When Message-Class is Auto, the field SHALL always be present and the value SHALL be No.X-Mms -Read-ReplyRead-reply -valueOptional.Specifies whether the user wants a read report from each recipient as a new message. When Message-Class is Auto, the field SHALL always be present and the value SHALL be No.Content-TypeContent-type-valueMandatory.The content type of the message.以上字段除了开头的Message-Type、Transaction-ID、MMS-Version和末尾的Content-Type之外，其他字段没有顺序要求，以下消息也是一样。2.1.2 MMS发送确认MMS发送确认由MMS中心到发送者，只包含消息头，没有正文。消息头格式如下：NameContentCommentsX-Mms -Message-TypeMessage-type-value = m- send -confMandatory.Identifies the message type.X-Mms -Transaction-IDTransaction-id-valueMandatory.This transaction ID identifies the M -Send.conf and the corresponding request only.X-Mms -MMS-VersionMMS-version-valueMandatory.The MMS version number. According to this specification, the version is 1.0X-Mms -Response-StatusResponse-status -valueMandatory.MMS specific status.X-Mms -Response-TextResponse-text -valueOptional.Description which qualifies the response status value.Message-IDMessage-ID-valueOptional.This is a unique reference assigned to message. This ID SHALL always be present when the MMS Proxy - Relayaccepted the message.The ID enables a client to match delivery reports with previously sent messages.2.2 通知通知是指MMS中心发送通知到接收者，包括两条消息：请求和响应。目前是通过SMS进行通知，Gb接口上不存在该类数据包，所以在这里不做分析。2.3 提取提取是指MMS接收者从MMS中心提取MMS的过程，包括三个步骤：提取请求、提取响应、响应确认。2.3.1 MMS提取请求MMS提取请求消息是由接收者到MMS中心，没有真正的消息头和正文，完全由WSP或HTTP的请求头实现，也就是WSP或HTTP一个普通的GET请求，其uri是通知消息里指定的地址。2.3.2 MMS提取响应MMS提取响应消息是由MMS中心到接收者，包括消息头和正文，消息头包含内容如下：NameContentCommentsX-Mms -Message-TypeMessage-type-value =m-retrieve-confMandatory.Specifies the message type.X-Mms -Transaction-IDTransaction-id-valueOptional.Identifies either the transaction that has been started by M-Notification without M -NotifResp or new transaction when deferred delivery was requested. The new transaction ID is optional.X-Mms -MMS-VersionMMS-version-valueMandatory.The MMS version number. According to this specification, the version is 1.0.Message-IDMessage-ID-valueOptional.This is an unique reference assigned to message. This ID SHALL always be present when the originator client requested a read reply.The ID enables a client to match read reports withpreviously sent messages.DateDate-valueMandatory.Sending date and time.FromFrom-valueOptional.Address of the sender. If hiding the address of the sender from the recipient is supported, the MMS Proxy -Relay will not add this field to a message header.ToTo-valueOptional.Address of the recipient. Any number of address fields allowed.CcCc-valueOptional.Address of the recipient. Any number of address fields allowed.SubjectSubject-valueOptional.Message subjectX-Mms -Message-ClassMessage-class -valueOptional.Message class. If field is not present, the receiver inteprets the message as personal.X-Mms -PriorityPriority-valueOptional. Default: NormalPriority of the message.X-Mms -Delivery - ReportDelivery -report -valueOptional. Default: No.Specifies whether the user wants a delivery report from each recipient.X-Mms -Read-ReplyRead-reply -valueOptional. Default: No.Specifies whether the user wants a read report from each recipient as a new message.Content-TypeContent-type-valueMandatory.The content type of the message.2.3.3 MMS提取响应确认MMS提取响应确认消息由接收者到MMS中心，包括消息头，不包含正文，消息头包含内容如下：NameContentCommentsX-Mms -Message-TypeMessage-type-value = m- acknowledge-indMandatory.Identifies the transaction type.X-Mms -Transaction-IDTransaction-id-valueMandatory.This is the transaction number that originates from immediately previous M -Retrieve operation.X-Mms -MMS-VersionMMS-version-valueMandatory.The MMS version number. According to this specification, the version is 1.0X-Mms -Report -AllowedReport -allowed-valueOptional. Default: Yes.Sending of delivery report allowed to the user.2.4 回执包括两种回执：提取回执和阅读回执，是可选的。2.4.1 MMS提取回执当接收者从MMS中心取得MMS后，MMS中心会向发送者发送提取回执。MMS提取回执消息只有消息头，没有正文。消息头格式如下：NameContentCommentsX-Mms -Message-TypeMessage-type-value = m- delivery -indMandatory.Identifies the PDU type.X-Mms -MMS-VersionMMS-version-valueMandatory.The MMS version number. According to this specification, the version is 1.0Message-IDMessage-ID-valueMandatory.Identifier of the message. From Send request, connects delivery report to sent message in MS.ToTo-valueMandatory.Needed for reporting in case of point-to-multipoint message.DateDate-valueMandatory.Date and time the message was handled (fetched, expired, etc.) by the recipient or MMSProxy -Relay.X-Mms -StatusStatus-valueMandatory.The status of the message.2.4.2 MMS阅读回执当接收者阅读完MMS后，MMS中心会向发送者发送提取回执。该回执是在发送者发送MMS时要求有阅读回执时才会产生，该消息格式不清楚，我们暂不做分析。2.5 字段说明以上消息头每一个字段都是KV结构，前面是字段名称，后面是字段值。字段名称是一个字节，对应编码如下：NameAssignedNumberValueBcc0x01用户地址，是以0结尾的字符串Cc0x02用户地址，是以0结尾的字符串Content-Location0x0 3Uri地址，是以0结尾的字符串Content-Type0x04与WSP的Content-Type一样Date0x054字节的长整形值，自1970 -01-01, 00:00:00 GMT到现在的秒数Delivery -Report0x06Yes：0x80，No：0x81Delivery -Time0x075字节，第一个字节代表时间类型，后4个字节是时间值，时间类型：绝对时间0x80，相对时间0x81Expiry0x085字节，第一个字节代表时间类型，后4个字节是时间值，时间类型：绝对时间0x80，相对时间0x81From0x09第一个字节代表地址类型，后面字符串代表地