2

server-exp2/togglest_pre.c

@@ -0,0 +1,100 @@
+#include "common.h"
+#include "taskline.h"
+
+#define NTHREADS  4
+#define SBUFSIZE   16
+
+void toggle(int conn_sock,int hit);
+void *handle_request(void *vargp);
+
+task_line_t tlp;                    /* task pool: shared buffer of connected descriptors */
+
+int main(int argc, char **argv) 
+{
+    int listen_sock, conn_sock, port,i; 
+    struct sockaddr_in clientaddr; 
+    struct hostent *hp;
+    char *haddrp;
+    int hit;
+    task_t item;               //连接客户信息：socket和客户编号
+    int nth[NTHREADS];
+    
+    socklen_t clientlen=sizeof(struct sockaddr_in);
+
+    pthread_t tid; 
+
+    if (argc != 2) {
+	    fprintf(stderr, "usage: %s <port>\n", argv[0]);
+	    exit(1);
+    }
+    
+    listen_sock = open_listen_sock(port);
+    if( listen_sock==-1) {
+    	printf("端口号%d繁忙\n",port);
+    	exit(1);
+    }
+    
+    
+    port = atoi(argv[1]);
+    task_line_init(&tlp, SBUFSIZE);
+    
+    listen_sock = open_listen_sock(port);
+    if( listen_sock==-1) {
+    	printf("端口号%d繁忙\n",port);
+    	exit(1);
+    }
+    
+    for (i = 0; i < NTHREADS; i++)  {     /* Create worker threads */
+            nth[i]=i;
+	    pthread_create(&tid, NULL, handle_request, (void *)&nth[i]);
+    }
+
+    for (hit=1; ; hit++) { 
+	    item.conn_sock = accept(listen_sock, (SA *) &clientaddr, &clientlen);
+	    item.hit=hit;
+	    
+           /* determine the domain name and IP address of the client */
+	    hp = gethostbyaddr((const char *)&clientaddr.sin_addr.s_addr, 
+			   sizeof(clientaddr.sin_addr.s_addr), AF_INET);
+	    haddrp = inet_ntoa(clientaddr.sin_addr);
+	    printf("server connected to %s (%s)\n", hp->h_name, haddrp);
+
+	    task_insert(&tlp, item);  /* Insert conn_sock in task pool */
+    }
+}
+
+void *handle_request(void *vargp) 
+{
+    int tid=*(int*) vargp;
+    task_t  item;
+    pthread_detach(pthread_self()); 
+    
+    while (1) { 
+	    item=task_remove(&tlp);   /* Remove a task from task line */
+	    
+	    printf("线程%d服务第%d个客户通信开始\n",tid,item.hit);
+	    
+	    toggle(item.conn_sock,item.hit);            /* Serve client */	   	    
+	    close(item.conn_sock);
+	    
+	    printf("线程%d服务第%d个客户通信结束\n",tid,item.hit);
+    }
+}
+
+void toggle(int conn_sock,int hit) 
+{
+    size_t n; int i,no=0;
+    char buf[MAXLINE]; 
+
+    while((n =recv(conn_sock, buf, MAXLINE,0))> 0) {
+	printf("toggle服务器收到第%d个客户第%d个消息,长度为%d字节\n", hit,++no,(int)n);
+
+        for(i=0; i<n; i++)
+            if(isupper(buf[i])) 
+                buf[i]=tolower(buf[i]);
+            else if(islower(buf[i]))
+                buf[i]=toupper(buf[i]);
+               
+	send (conn_sock, buf, n, 0);
+    }
+}