ipmsg.html

linux程序学习里面全是一些关于linux方面的源代码

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<br>
&nbsp; &nbsp; (Encrypted message transmission) IPMSG_ENCRYPTOPT is used in<br>
&nbsp; &nbsp; IPMSG_SENDMSG. At the first part of extension, input the value which<br>
&nbsp; &nbsp; is 'or' resoult from Convination of public key and common key type .<br>
&nbsp; &nbsp; Then use common key which encrypt with public key devide by ':'.<br>
&nbsp; &nbsp; Then input message which is eccrypted by public key devide by ':'.<br>
&nbsp; &nbsp; If both supports IPMSG_SIGN_XXX, then add ':' and signeture.<br>
<br>
&nbsp; &nbsp; Also, In the method of encode padding, PKCS#1ECB key is used for RSA,<br>
&nbsp; &nbsp; PKCS#5 CBC common key is used for RC2/blowfish.<br>
<br>
&nbsp; &nbsp; Also, The Packet related to Entry manifestation the capability of<br>
&nbsp; &nbsp; ecryption support using IPMSG_ENCRYPTOPT<br>
<br>
&nbsp;&nbsp;4) Extension with file attachment(Available from version-9 )<br>
<br>
&nbsp; &nbsp; An IPMSG_SENDMSG command with an IPMSG_FILEATTACHOPT flag for<br>
&nbsp; &nbsp; File transfer (download permission)notification sends a message<br>
&nbsp; &nbsp; with attachment.<br>
&nbsp; &nbsp; Input '\0' after the message and attachment file data.<br>
&nbsp; &nbsp;<br>
<br>
&nbsp; &nbsp; fileID:filename:size:mtime:fileattr[:extend-attr=val1<br>
&nbsp; &nbsp; [,val2...][:extend-attr2=...]]:\a:fileID...<br>
&nbsp; &nbsp; (size, mtime, and fileattr describe hex format.<br>
&nbsp; &nbsp;&nbsp; &nbsp;If a filename contains ':', please replace with "::".)<br>
<br>
&nbsp; &nbsp; When Receive Message downloads an attachment file, an IPMSG_GETFILEDATA<br>
&nbsp; &nbsp; command requests a data transmission packet to the TCP port that is the same number<br>
&nbsp; &nbsp; as the UDP sending port number. Input packetID:fileID: offset to the extended area.<br>
&nbsp; &nbsp; (Use all hex format.)<br>
&nbsp; &nbsp; File Transfer side receives the request. After recognizing that it's a correct request,<br>
&nbsp; &nbsp; then send the specified data (no format)<br>
<br>
&nbsp; &nbsp; When the data receiving side downloads a hierarchical attachment file,<br>
&nbsp; &nbsp; use an IPMSG_GETDIRFILES command and input a packetID:fileID<br>
&nbsp; &nbsp; to the extended area and send a data transmission request packet.<br>
&nbsp; &nbsp; (all hex format)<br>
<br>
&nbsp; &nbsp; Data sending side sends the following hierarchical data format.<br>
&nbsp; &nbsp; header-size:filename:file-size:fileattr[:extend-attr=val1<br>
&nbsp; &nbsp; [,val2...][:extend-attr2=...]]:contents-data<br>
&nbsp; &nbsp; Next headersize: Next filename...<br>
&nbsp; &nbsp; (All hex format except for filename and contetns-data)<br>
<br>
&nbsp; &nbsp; header-size is from the beginning of header-size to the delimiter ':'<br>
&nbsp; &nbsp; that is before contents-data. extend-attr can be omitted and used multiple<br>
&nbsp; &nbsp; extended attributes. Use '=' for data input.<br>
<br>
&nbsp; &nbsp; When fileattr is IPMSG_FILE_DIR, IPMsg recognizes that it is automatically<br>
&nbsp; &nbsp; in the directory, the next file data is after the directory.<br>
<br>
&nbsp; &nbsp; When fileattr is IPMSG_FILE_RETPARENT, IMPsg recognizes that it returns<br>
&nbsp; &nbsp; to the parent directory. In this case, File name is always "." and the attribute<br>
&nbsp; &nbsp; value is the current directory data.<br>
<br>
&nbsp; &nbsp; Sending process starts from the attachment directly and returns the<br>
&nbsp; &nbsp; IPMSG_FILE_RETPARENT command to the attachment directory.<br>
<br>
&nbsp; &nbsp; Add an IPMSG_FILEATTACHOPT flag for an Entry packet to support the<br>
&nbsp; &nbsp; attachment file.<br>
<br>
&nbsp;&nbsp;5) Other commands<br>
<br>
&nbsp; &nbsp; When acquiring different versions, send an IPMSG_GETINFO command.<br>
&nbsp; &nbsp; Receiving side sends the version information character string to<br>
&nbsp; &nbsp; extended area.<br>
<br>
&nbsp; &nbsp; Send an IPMSG_GETABSENCEINFO command for acquiring an absence message.<br>
&nbsp; &nbsp; Receiving side sends an IPMSG_SENDABSENCEINFO back if the status is absence mode.<br>
&nbsp; &nbsp; If the status is not absence mode, a character string "Not absence mode" will be sent back.<br>
<br>
&nbsp;&nbsp;6) Confirmation/Retry<br>
<br>
&nbsp; &nbsp; If a confirmation packet for IPMSG_SENDMSG or IPMSG_RECVMSG is not delivered<br>
&nbsp; &nbsp; within a specified time, then it will be sent again.<br>
&nbsp; &nbsp; A number of retry actions or interval period is depended on the current condition.<br>
<br>
<br>
4. Other<br>
<br>
&nbsp;&nbsp;1) Linefeed<br>
<br>
&nbsp; &nbsp; Linefeed characters in Send Message is standardized with UNIX type ('0x0a').<br>
&nbsp; &nbsp; Please change if needed.<br>
<br>
&nbsp;&nbsp;2) Delimiter ':'<br>
<br>
&nbsp; &nbsp; ':' is used as a delimiter. You can't use this delimiter for user name<br>
&nbsp; &nbsp; and host name.<br>
&nbsp; &nbsp; If the use/host names contain a ':', please replace with another sign,<br>
&nbsp; &nbsp; for an example ';'.<br>
&nbsp; &nbsp; Although using this delimiter isn't problem as yet, I may create an<br>
&nbsp; &nbsp; escape sequence.<br>
&nbsp; &nbsp;<br>
<br>
&nbsp;&nbsp;3) Kanji codes<br>
<br>
&nbsp; &nbsp; SJIS<br>
<br>
<br>
5. Contact e-mail address<br>
<br>
&nbsp; &nbsp; E-Mail <a href="mailto:[e-mail]">[e-mail]</a><br>
<br>
<br>
Note<br>
&nbsp; &nbsp; See ipmsg.h for command codes.<br>
&nbsp; &nbsp; Please e-mail me your comments and suggestions.[/quote]<br>
		
		
		
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<font color="#000066">&nbsp;发表于： 2007-12-27，修改于： 2007-12-27 09:12&nbsp;已浏览663次，有评论0条</font>
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