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An UDP Server implementation in Swift
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// | |
// main.swift | |
// UDP Server example | |
// | |
// Created by Sebestyén Gábor on 2015. 09. 12.. | |
// | |
// Original source: http://www.cs.ucsb.edu/~almeroth/classes/W01.176B/hw2/examples/udp-server.c | |
import Foundation | |
// CONSTANTS | |
let INADDR_ANY : UInt32 = 0x00000000 | |
let sockfd = socket(AF_INET, SOCK_DGRAM, 0) | |
let servaddr_p = UnsafeMutablePointer<sockaddr_in>.alloc(sizeof(sockaddr_in)) | |
servaddr_p.memory = sockaddr_in( | |
sin_len: 0, | |
sin_family: UInt8(AF_INET), | |
sin_port: UInt16(32000).bigEndian, | |
sin_addr: in_addr(), | |
sin_zero: (0,0,0,0,0,0,0,0) | |
) | |
// bind socket | |
bind(sockfd, UnsafePointer<sockaddr>( servaddr_p ), UInt32( sizeof(sockaddr_in) ) ) | |
let mesg = UnsafeMutablePointer<CChar>.alloc(1000); | |
let cliaddr = UnsafeMutablePointer<sockaddr_in>.alloc( sizeof(sockaddr_in)) | |
let recvlen = UnsafeMutablePointer<socklen_t>.alloc(sizeof(socklen_t)) | |
while true { | |
let len = sizeof(sockaddr_in) | |
var n = recvfrom(sockfd, mesg, 1000, 0, UnsafeMutablePointer<sockaddr>(cliaddr) , recvlen) | |
sendto(sockfd,mesg,n,0, UnsafeMutablePointer<sockaddr>(cliaddr), UInt32(sizeof(sockaddr_in))) | |
print("-------------------------------------------------------") | |
mesg[n] = 0 | |
print("Received the following:") | |
if let str = String.fromCString(mesg) { | |
print(str) | |
} | |
print("-------------------------------------------------------") | |
} |
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