linux 下用c语言编写的聊天室程序,服务器和客户端.doc

/* * server.c * * Created on: 2012-6-15 * Author: root */ #include stdio.h #include stdlib.h #include pthread.h #include string.h #include unistd.h #include sys/socket.h #include sys/types.h #include error.h #includenetinet/in.h #define PORT 7999 #define MAX_NUM 3 //client连接最大个数 #define MAX_CLIENT 15 #define MAX_SIZE 1024 pthread_rwlock_t idx_lock, wait_lock; //client 信息 typedef struct _client { int sockfd; char name[20]; pthread_t pid; int flg; } c_client; c_client client[MAX_CLIENT];//定义client; //等待的client struct _client_ { int sockfd; char name[20]; pthread_t pid; struct _client_ *next; }; typedef struct _client_ c_client_c; c_client_c *head = NULL; c_client_c *temp_c1 = NULL, *temp_c2 = NULL;//等待的 //初始化client信息 void init_client() { int i = 0; for (i = 0; i MAX_CLIENT; i++) { client[i].sockfd = -1; memset(client[i].name, 0, 20); client[i].pid = -1; client[i].flg = -1; } } //查找结构体数组中sockfd为-1的下标值 int find_fd(c_client *client) { int i = 0; while (i MAX_NUM) { // printf(====%d\n,client[i].sockfd); if (client[i].sockfd == -1) return i; i++; } return -1; } //判断登录格式 int logform(char *buf) { char *p = strstr(buf, LOGIN\r\n); int n = strlen(buf); char *q = p + n - 4; if (p != NULL p + 7 != q strcmp(q, \r\n\r\n) == 0) return 1; else return 0; } int cmpname(char *buf, c_client *p_client) { int i = 0; char *p = strtok(buf + 7, \r\n\r\n); while (client[i].sockfd != -1 client[i].sockfd != p_client-sockfd i MAX_NUM) { if (strcmp(client[i].name, p) == 0) return 0; i++; } return 1; } //SHOW void showuser(c_client *p_client) { int i = 0; char buf[1024] = { 0 }; strcpy(buf, 200\r\n); for (i = 0; i MAX_NUM; i++) { if (client[i].sockfd != -1) { sprintf(buf + strlen(buf), %s\r\n, client[i].name); } } sprintf(buf + strlen(buf), \r\n); send(p_client-sockfd, buf, strlen(buf), 0); } //ALL void sendto_all(c_client *p_client, char *buf) { int i = 0; char sendbuf[1024] = { 0 }; sprintf(sendbuf, AFROM