完成了第 7 章 优雅的断开套接字的连接

ch07/file_server.c

@@ -0,0 +1,68 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+
+#define BUF_SIZE 30
+void error_handling(char *message);
+
+int main(int argc, char *argv[])
+{
+    int serv_sd, clnt_sd;
+    FILE *fp;
+    char buf[BUF_SIZE];
+    int read_cnt;
+
+    struct sockaddr_in serv_adr, clnt_adr;
+    socklen_t clnt_adr_sz;
+
+    if (argc != 2)
+    {
+        printf("Usage : %s <port>\n", argv[0]);
+        exit(1);
+    }
+    fp = fopen("file_server.c", "rb");
+    serv_sd = socket(PF_INET, SOCK_STREAM, 0);
+
+    memset(&serv_adr, 0, sizeof(serv_adr));
+    serv_adr.sin_family = AF_INET;
+    serv_adr.sin_addr.s_addr = htonl(INADDR_ANY);
+    serv_adr.sin_port = htons(atoi(argv[1]));
+
+    bind(serv_sd, (struct sockaddr *)&serv_adr, sizeof(serv_adr));
+    listen(serv_sd, 5);
+
+    clnt_adr_sz = sizeof(clnt_adr);
+    clnt_sd = accept(serv_sd, (struct sockaddr *)&clnt_adr, &clnt_adr_sz);
+
+    while (1)
+    {
+        //从文件流中读取数据，buffer为接收数据的地址，size为一个单元的大小，count为单元个数，stream为文件流
+        //返回实际读取的单元个数
+        read_cnt = fread((void *)buf, 1, BUF_SIZE, fp);
+        if (read_cnt < BUF_SIZE)
+        {
+            write(clnt_sd, buf, read_cnt);
+            break;
+        }
+        write(clnt_sd, buf, BUF_SIZE);
+    }
+
+    shutdown(clnt_sd, SHUT_WR);
+    read(clnt_sd, buf, BUF_SIZE);
+    printf("Message from client: %s \n", buf);
+
+    fclose(fp);
+    close(clnt_sd);
+    close(serv_sd);
+    return 0;
+}
+
+void error_handling(char *message)
+{
+    fputs(message, stderr);
+    fputc('\n', stderr);
+    exit(1);
+}