计算机网络-网络程序设计.docx

广州大学学生实验报告开课学院及实验室：计算机科学与工程实验室2014年12月13日学院计算机科学与教育软件学院年级/专业/班姓名学号实验课程名称计算机网络实验成绩实验项目名称网络程序设计指导老师熊伟1、 程序演示使用苹果编程语言实现程序效果，模拟器运行结果如下：启动后画面单击C机单击C后单击D，显示结果单击A后单击C，显示结果2、 程序设计思路根据网桥转发规则，我首先设计了PC类，代表主机。Bridege类，代表网桥，实例方法包括一些数据帧转发，登记移除转发表等。Framing类，代表数据帧，包括一些属性：目的地址，源地址等。由于算法并不复杂，而且基于ios平台的开发本来就比较熟手，开发过程并没遇到什么困难。3、 程序流程图3、 程序源代码由于篇幅有限，就不粘贴过多的代码。所有源代码压缩至附件上传。下面仅显示部分代码。Network类，构建UI画面，并负责协调处理PC，Bridge直接数据的传递。/ Network.m/ BridgeTransfer/ Created by Jeans on 12/14/14./ Copyright (c) 2014 Jeans. All rights reserved./#import "Network.h"#import "ShapeView.h"#import "Bridge.h"#import "PC.h"#define AppSize UIScreen mainScreen.applicationFrame.size#define HorizontalSpacing 35#define VerticalSpacing 80#define kAnimationDuring 2interface Network()<PCDelegate>property (strong, nonatomic) PC *A;property (strong, nonatomic) PC *B;property (strong, nonatomic) PC *C;property (strong, nonatomic) PC *D;property (strong, nonatomic) Bridge *B1;property (strong, nonatomic) ShapeView *pathShapeView;property (strong, nonatomic) ShapeView *backgroundShapeView;property (strong, nonatomic) UILabel *resultLabel;endimplementation Network- (id)initWithFrame:(CGRect)frame if (self = super initWithFrame:frame)/ self.backgroundColor = UIColor grayColor; /添加对象 CGPoint pcPoint = CGPointMake(HorizontalSpacing, VerticalSpacing); self.A = self NewPCByOrigin:pcPoint; self.A.name = "A" pcPoint.x += HorizontalSpacing + self.A.frame.size.width; self bringSubviewToFront:self.A; self.B = self NewPCByOrigin:pcPoint; self.B.name = "B" pcPoint.x += HorizontalSpacing + self.B.frame.size.width; self.B1 = self NewBridgeByOrigin:CGPointMake(pcPoint.x, 10); pcPoint.x += HorizontalSpacing + self.B1.frame.size.width; self.B1.port1PCs = self.A,self.B; self.C = self NewPCByOrigin:pcPoint; self.C.name = "C" pcPoint.x += HorizontalSpacing + self.C.frame.size.width; self.D = self NewPCByOrigin:pcPoint; self.D.name = "D" pcPoint.x += HorizontalSpacing + self.D.frame.size.width; self.B1.port2PCs = self.C,self.D; /绘制背景线 CGFloat y = self.B1.frame.origin.y + self.B1.frame.size.height - 10; UIBezierPath *path = UIBezierPath bezierPath; path moveToPoint:CGPointMake(10, y); path addArcWithCenter:CGPointMake(10, y) radius:4.0 startAngle:0 endAngle:2*M_PI clockwise:YES; CGPoint p = CGPointMake(self.B1.frame.origin.x, y); path addLineToPoint:p; p.x += self.B1.frame.size.width; path moveToPoint:p; p.x = self.frame.size.width - 10; path addLineToPoint:p; path addArcWithCenter:p radius:4.0 startAngle:0 endAngle:2*M_PI clockwise:YES; p.x = self.A.frame.origin.x+self.A.frame.size.width/2; path moveToPoint:p; path addLineToPoint:CGPointMake(p.x, VerticalSpacing); p.x = self.B.frame.origin.x+self.B.frame.size.width/2; path moveToPoint:p; path addLineToPoint:CGPointMake(p.x, VerticalSpacing); p.x = self.C.frame.origin.x+self.C.frame.size.width/2; path moveToPoint:p; path addLineToPoint:CGPointMake(p.x, VerticalSpacing); p.x = self.D.frame.origin.x+self.D.frame.size.width/2; path moveToPoint:p; path addLineToPoint:CGPointMake(p.x, VerticalSpacing); self.backgroundShapeView.shapeLayer.path = path.CGPath; self drawLineAnimation:self.backgroundShapeView.shapeLayer; return self;- (PC*)NewPCByOrigin:(CGPoint)aOrigin PC *pc = (PC*)NSBundle mainBundleloadNibNamed:"PC" owner:self options:nillastObject; pc.frame = CGRectMake(aOrigin.x, aOrigin.y, pc.frame.size.width, pc.frame.size.height); pc.delegate = self; self addSubview:pc; return pc;- (Bridge*)NewBridgeByOrigin:(CGPoint)aOrigin Bridge *bri = (Bridge*)NSBundle mainBundleloadNibNamed:"Bridge" owner:self options:nillastObject; bri.frame = CGRectMake(aOrigin.x, aOrigin.y, bri.frame.size.width, bri.frame.size.height); self addSubview:bri; return bri;- (ShapeView*)backgroundShapeView if (!_backgroundShapeView) _backgroundShapeView = ShapeView allocinit; _backgroundShapeView.shapeLayer.fillColor = nil; _backgroundShapeView.shapeLayer.strokeColor = UIColor colorWithRed:0 green:0 blue:0 alpha:1.CGColor; _backgroundShapeView.shapeLayer.lineWidth = 1; _backgroundShapeView.shapeLayer.frame = self.bounds; _backgroundShapeView.shapeLayer addSublayer:self.A.layer; _backgroundShapeView.shapeLayer addSublayer:self.B.layer; _backgroundShapeView.shapeLayer addSublayer:self.C.layer; _backgroundShapeView.shapeLayer addSublayer:self.D.layer; self.layer addSublayer:_backgroundShapeView.shapeLayer; return _backgroundShapeView;- (UILabel*)resultLabel if (!_resultLabel) _resultLabel = UILabel allocinitWithFrame:CGRectMake(self.B1.frame.origin.x+self.B1.frame.size.width/2 - 250,200,500,50); _resultLabel.textAlignment = NSTextAlignmentCenter; _resultLabel.backgroundColor = UIColor clearColor; self.backgroundShapeView.shapeLayer addSublayer:_resultLabel.layer; return _resultLabel;#pragma mark - 画线-(void)drawLineAnimation:(CALayer*)layer CABasicAnimation *bas = CABasicAnimation animationWithKeyPath:"strokeEnd" bas.duration = kAnimationDuring; bas.delegate = self; bas.fromValue = 0.0; bas.toValue = 1.0; layer addAnimation:bas forKey:"key"#pragma mark - PC Delegate- (void)PCPressed:(PC *)aPC self.resultLabel.text = self.B1 addOrRemovePC:aPC;endBridge类，网桥类，根据网桥转发规则实现转发功能，并输出对应文字提示。/ Bridge.m/ BridgeTransfer/ Created by Jeans on 12/14/14./ Copyright (c) 2014 Jeans. All rights reserved./#import "Bridge.h"#import "PC.h"interface Bridge()property (strong, nonatomic) NSMutableArray *currentPCs;endimplementation Bridge- (id)initWithCoder:(NSCoder *)aDecoder if (self = super initWithCoder:aDecoder) self customInit; return self;- (id)initWithFrame:(CGRect)frame if (self = super initWithFrame:frame) self customInit; return self;- (void)customInit - (NSMutableArray*)currentPCs if (!_currentPCs) _currentPCs = NSMutableArray allocinit; return _currentPCs;- (NSString*)addOrRemovePC:(PC *)aPC NSString *string = nil; if (self.currentPCs containsObject:aPC) self.currentPCs removeObject:aPC; else self.currentPCs addObject:aPC; string = NSString stringWithFormat:"%->",aPC.name; if (self.currentPCs.count = 2) PC *p1 = self.currentPCs0; PC *p2 = self.currentPCs1; /转发 string = NSString stringWithFormat:"%->% ",p1.name,p2.name; if (self.port1PCs containsObject:p1 && self.port1PCs containsObject:p2) string = string stringByAppendingFormat:"两机同在网段1，不用转发" else if (self.port2PCs containsObject:p1 && self.port2PCs containsObject:p2) string = string stringByAppendingFormat:"两机同在网段2，不用转发" else if (self.port1PCs containsObject:p1) string = string stringByAppendingFormat:"网段1:% 发往 网段2:% 成功",p1.name,p2.name; else string = string stringByAppendingFormat:"网段2:% 发往 网段1:% 成功",p1.name,p2.name; self.currentPCs removeAllObjects; return string;end第14页