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The function getnameinfo() converts the internal binary representation of an IP address in the form of a pointer to a struct sockaddr into text strings consisting of the hostname or, if the address cannot be resolved into a name, a textual IP address representation, as well as the service port name or number. The function prototype is specified ...
For a Unix domain socket, the name is a /path/filename. For an Internet domain socket, the name is an IP address:Port number. In either case, the name is called an address. [3] Two processes may communicate with each other if each obtains a socket. The server process binds its socket to an address, opens a listen channel, and then continuously ...
bind() is typically used on the server side, and associates a socket with a socket address structure, i.e. a specified local IP address and a port number. listen() is used on the server side, and causes a bound TCP socket to enter listening state. connect() is used on the client side, and assigns a free local port number to a socket. In case of ...
An application can communicate with a remote process by exchanging data with TCP/IP by knowing the combination of protocol type, IP address, and port number. This combination is often known as a socket address. It is the network-facing access handle to the network socket.
The port numbers in the range from 0 to 1023 (0 to 2 10 − 1) are the well-known ports or system ports. [3] They are used by system processes that provide widely used types of network services. On Unix-like operating systems, a process must execute with superuser privileges to be able to bind a network socket to an IP address using one of the ...
The IP address/protocol/port number triple defines an association with a network socket. For publicly accessible services such as web and mail servers the port number is important. For example, port 443 connects through a socket to the web server software and port 465 to a mail server's SMTP daemon. [7]
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SOCKS version number, 0x04 for this version CMD command code: 0x01 = establish a TCP/IP stream connection; 0x02 = establish a TCP/IP port binding; DSTPORT 2-byte port number (in network byte order) DESTIP IPv4 Address, 4 bytes (in network byte order) ID the user ID string, variable length, null-terminated.