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Top Forums Programming Need help about read() and write() on TCP/IP Post 302471575 by Loic Domaigne on Saturday 13th of November 2010 11:34:11 PM
Old 11-14-2010
Dear Lixiao,

start studying and writing your 'hello world' client/server, see for instance Programming IP Sockets on Linux, Part One . Then apply your gained knowledges to solve your particular problem.

You must enter the (socket programming) Path yourself Smilie
This User Gave Thanks to Loic Domaigne For This Post:
 

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ns_requestauthorize(3aolserver) 			    AOLserver Built-In Commands 			   ns_requestauthorize(3aolserver)

__________________________________________________________________________________________________________________________________________________

NAME
ns_requestauthorize - commands SYNOPSIS
ns_requestauthorize option ?arg arg ...? _________________________________________________________________ DESCRIPTION
ns_requestauthorize method URL authuser authpassword ?ipaddr? Ask the server to check permissions using nsperm. This function does the same permission check that the AOLserver does before serving a URL. If the nsperm module is loaded, the algorithm is as follows. 1. If the authuser is "nsadmin", the password is correct, and the IP address of the client is allowed nsadmin access, then access is autho- rized. 2. Find the relevant permission record. If an exact match for the method and URL combination is not found, the end of the URL is pared down until a match is found. For example, if there is no match for `/products/cereals/raisin_bran.html,' then the server looks for a permis- sion record for the URL `/products/cereals.' If that permission record is specified as "Exact URL match is NOT required", then that per- mission record is used. By default, the server comes with a row that says GET on `/' is open to the world. If no relevant permission record is found, access is denied (forbidden). 1. If the authuser is in the "Allow Users" list, access is permitted. If the authuser is a member of a group in the "Allow Groups" list and not in the "Deny Users" list, access is permitted. 2. If the host is in the "Hosts to allow" list, access is permitted. If the host is in the "Hosts to deny" list, access is denied. 3. If the request does not come in with authorization data, access is denied. 4. The user and password are verified. If there is no password specified in the database, any password is accepted. 5. Otherwise, access is denied. Return Values: The following values can be returned by ns_requestauthorize. OK The user has permission to execute this URL and method. DENIED The user does not have permission to execute this URL and method. FORBIDDEN There is no possible user/password/IP Address combination that would give authorization. ERROR There was an error. SEE ALSO
ns_passwordcheck, ns_crypt KEYWORDS
AOLserver 4.0 ns_requestauthorize(3aolserver)
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