T1版本，缺少了Client ,因为不小心被我rm了找不回来。但幸亏我有T2版本

Server.c

+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+#include <sys/select.h>
+
+#define Max_clnt_cnt 100
+#define BUF_SIZE 1024
+
+int clnt_cnt = 0;
+socklen_t socklen_IPV4;
+int clnt_socks[Max_clnt_cnt];
+struct sockaddr_in clnt_adrs[Max_clnt_cnt];
+
+void error_handling(char *message);
+
+int main(int argc, char *argv[])
+{
+    int serv_sock;               //服务器socket
+    struct sockaddr_in serv_adr; //服务器地址
+
+    serv_sock = socket(AF_INET, SOCK_STREAM, 0); //IPPORT_TELNET
+    memset(&serv_adr, 0, sizeof(serv_adr));
+    serv_adr.sin_family = AF_INET;
+    //serv_adr.sin_addr.s_addr = htonl(INADDR_ANY);
+    //char ip[20];
+    //puts("Enter ServerIp:");
+    //scanf("%s", ip);
+    serv_adr.sin_addr.s_addr = inet_addr("100.2.169.8");
+    //serv_adr.sin_addr.s_addr = inet_addr(ip);
+    serv_adr.sin_port = htons(9190);
+
+    if (bind(serv_sock, (struct sockaddr *)&serv_adr, sizeof(serv_adr)) == -1)
+        error_handling("bind() error\n");
+    printf("bind Ok ServerIp %s \t%d\n", inet_ntoa(serv_adr.sin_addr), ntohs(serv_adr.sin_port));
+    if (listen(serv_sock, Max_clnt_cnt) == -1)
+        error_handling("listen() error\n");
+
+    //accept(serv_sock, NULL, 0);
+
+    fd_set reads;
+    fd_set cpy_reads;
+    int fd_max;
+    FD_ZERO(&reads);
+    fd_max = serv_sock;
+    FD_SET(serv_sock, &reads);
+
+    while (1)
+    {
+        /* SELECT 处理连接 */
+        cpy_reads = reads;
+        struct timeval time_out;
+        time_out.tv_sec = 1;
+        time_out.tv_usec = 0;
+        int ret = select(fd_max + 1, &cpy_reads, NULL, NULL, &time_out);
+        if (ret == -1)
+            error_handling("select() error\n");
+        else if (ret == 0)
+            continue;
+        else
+        {
+            for (int i = 0; i < fd_max + 1; i++)
+            {
+                if (FD_ISSET(i, &cpy_reads))
+                {
+                    if (i == serv_sock)
+                    {
+                        struct sockaddr_in tmp_cln_adr;
+                        int tongxunsock = accept(serv_sock, (struct sockaddr *)&tmp_cln_adr, &socklen_IPV4);
+                        clnt_adrs[++clnt_cnt] = tmp_cln_adr;
+                        FD_SET(tongxunsock, &reads);
+                        if (fd_max < tongxunsock)
+                            fd_max = tongxunsock;
+                        printf("connected client :%d\t %s %d\n", tongxunsock, inet_ntoa(tmp_cln_adr.sin_addr), ntohs(tmp_cln_adr.sin_port));
+                    }
+                    else
+                    {
+                        sleep(1); //睡1秒确保一次性收取所有信息
+                        char buf[BUF_SIZE];
+                        int str_len;
+                        memset(buf, 0, BUF_SIZE);
+                        str_len = read(i, buf, BUF_SIZE); //TODO 数据太长，要接受完再发送
+                        if (str_len == 0)
+                        {
+                            printf("client:%d 断开连接\n", i);
+                            FD_CLR(i, &reads);
+                            close(i);
+                        }
+                        else
+                        {
+                            for (int j = serv_sock + 1; j < fd_max + 1; j++)
+                            {
+                                if (j != i)
+                                {
+                                    write(j, buf, strlen(buf));
+                                    printf("返回数据给client:%d-->%s", j, buf);
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+    close(serv_sock);
+
+    return 0;
+}
+
+void error_handling(char *message)
+{
+    printf("%s", message);
+    exit(0);
+}
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