Net Module Documentation

The net module provides functionalities for network communication, including DNS lookup, TCP and UDP address resolution, and various methods for establishing network connections.

Functions

dnslookup(host)

Performs a DNS lookup for the given host.

• host: The hostname to lookup.

Returns an array of IP addresses associated with the given host.

resolve_tcp_addr(network, address)

Resolves a TCP address.

• network: Network type (e.g., "tcp", "tcp4", "tcp6").
• address: The address to resolve.

Returns a string representation of the resolved TCP address.

resolve_udp_addr(network, address)

Resolves a UDP address.

• network: Network type (e.g., "udp", "udp4", "udp6").
• address: The address to resolve.

Returns a string representation of the resolved UDP address.

dial(network, address)

Establishes a generic network connection.

• network: Network type (e.g., "tcp", "udp").
• address: The address to connect to.

Returns a connection object with methods for interaction.

dialtcp(network, address)

Establishes a TCP network connection.

• network: Network type (e.g., "tcp", "tcp4", "tcp6").
• address: The address to connect to.

Returns a connection object with methods for interaction.

Connection Object Methods

close()

Closes the network connection.

read(buffer)

Reads data from the connection into the buffer.

• buffer: The buffer to read data into.

Returns the number of bytes read.

write(buffer)

Writes data from the buffer to the connection.

• buffer: The buffer containing data to write.

Returns the number of bytes written.

local_addr()

Returns the local address of the connection.

remote_addr()

Returns the remote address of the connection.

set_deadline(t)

Sets the read and write deadlines for the connection.

• t: The deadline time.

set_readdeadline(t)

Sets the read deadline for the connection.

• t: The read deadline time.

set_writedeadline(t)

Sets the write deadline for the connection.

• t: The write deadline time.

Example Usage

import "net"

// DNS Lookup
addresses := net.dnslookup("example.com")
println(addresses)

// Resolve TCP Address
tcp_addr := net.resolve_tcp_addr("tcp", "example.com:80")
println(tcp_addr)

// Resolve UDP Address
udp_addr := net.resolve_udp_addr("udp", "example.com:80")
println(udp_addr)

// Dial a TCP Connection
conn := net.dialtcp("tcp", "example.com:80")
if !is_error(conn) {
    println("Connected to: ", conn.remote_addr())

    // Write to the connection
    msg := bytes("GET / HTTP/1.1\r\nHost: example.com\r\n\r\n")
    n := conn.write(msg)
    println("Bytes written: ", n)

    // Read from the connection
    buf := bytes(1024)
    n = conn.read(buf)
    println("Response: ", string(buf[:n]))

    // Close the connection
    conn.close()
}