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UDP sendto() function allows you to mention the destination...

<< Back to: [comp.unix.programmer] Unix-socket-faq for network programming

Question by santhosh
Submitted on 12/8/2003
Related FAQ: [comp.unix.programmer] Unix-socket-faq for network programming
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UDP sendto() function allows you to mention the destination ip and port to which you want to send data. But I wanted to specify the source port also.
for example,
I want to send some data to (a server)"192.168.14.56:5062" from the client using the port 5060.
(Data should go from the port 5060 of my system to the port 5062 of other system)



Answer by socket_newbie
Submitted on 2/13/2005
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Using TCP you could specify this information. UDP does not maintain the information of who is sending data.

 

Answer by Chunsheng Guo
Submitted on 3/16/2005
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When you call sendto(handler, IP_addr, buf, len), handler contains your local source address information.
Handler value is assigned when you open a sock and bind.

 

Answer by Isa Muqattash
Submitted on 11/24/2005
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You can simply append the source port number to the data sent within the packet, and then have the receiver extract this info

 

Answer by Adam
Submitted on 12/5/2005
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You need to bind() the socket with the source port address. Then use sendto() with the destination address.

 

Answer by Wolfgang Jia
Submitted on 1/3/2006
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Bind the socket to certain address and port before send any data. If you want to send and receive by the same port, use the receiving socket to send the data.

 

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