需求：软件划分为用户客户端和主播服务端两个软件client.c和server.c 用户客户端负责：1.接收用户的昵称2.接收用户输入的信息，能够将信息发送给服务端3.接收服务端回复的数据信息,并完成显示主播服务端负责：1.对所有加入直播间的用户的IP地址和端口实现管理（加入、退出）2.当有新的客户端加入时,能够向所有客户端提示:"欢迎 XXX 用户进入直播间"3.当有客户端退出时,能够向所有客户端提示:"XXX 离开直播间"4.能够实现客户端聊天内容的转发,当某个客户端发送聊天信息时,能够将该信息转给除了该用户之外聊天室内所有其余客户端用户

head.h文件

#ifndef __HEAD_H__
#define __HEAD_H__#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <dirent.h>
#include <time.h>
#include <pwd.h>
#include <grp.h>
#include <pthread.h>
#include <semaphore.h>
#include <signal.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <sys/shm.h>
#include <sys/sem.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/ip.h>
#include <netinet/in.h>struct address
{int mark;struct sockaddr_in addr;
};struct msgbuf{int type;char name[32];char text[512];
};#define MSG_TYPE_START		100
#define MSG_TYPE_END		200
#define MSG_TYPE_CHAT		300
#define RECV_ADDR			"192.168.1.152"
#define RECV_PORT			50000#endif

client.c

#include "head.h"char name[32] = {0};
int sockfd = 0;
struct sockaddr_in recvaddr;
pthread_t tid_send;		//发线程
pthread_t tid_recv;		//收线程void *sendfun(void *arg)
{struct msgbuf sendmsg;	ssize_t nsize = 0;while (1){memset(&sendmsg, 0, sizeof(sendmsg));sendmsg.type = MSG_TYPE_CHAT;sprintf(sendmsg.name, "%s", name);gets(sendmsg.text);if (!strcmp(sendmsg.text, ".quit")){sendmsg.type = MSG_TYPE_END;}nsize = sendto(sockfd, &sendmsg, sizeof(sendmsg), 0, (struct sockaddr *)&recvaddr, sizeof(recvaddr));if (-1 == nsize){perror("fail to sendto");return NULL;}if (sendmsg.type == MSG_TYPE_END){break;}}pthread_cancel(tid_recv);return NULL;
}void *recvfun(void *arg)
{struct msgbuf recvmsg;ssize_t nsize = 0;while (1){memset(&recvmsg, 0, sizeof(recvmsg));nsize = recvfrom(sockfd, &recvmsg, sizeof(recvmsg), 0, NULL, NULL);if (-1 == nsize){perror("fail to recvfrom");return NULL;}if (recvmsg.type == MSG_TYPE_CHAT){printf("%s(%s:%d)>%s\n", recvmsg.name, RECV_ADDR, RECV_PORT, recvmsg.text);}else if (recvmsg.type == MSG_TYPE_END){break;}}pthread_cancel(tid_send);return NULL;
}int main(void)
{struct msgbuf sendmsg;ssize_t nsize = 0;recvaddr.sin_family = AF_INET;recvaddr.sin_port = htons(RECV_PORT);recvaddr.sin_addr.s_addr = inet_addr(RECV_ADDR);printf("请输入您的昵称:\n");gets(name);sockfd = socket(AF_INET, SOCK_DGRAM, 0);if (-1 == sockfd){perror("fail to socket");return -1;}memset(&sendmsg, 0, sizeof(sendmsg));sendmsg.type = MSG_TYPE_START;sprintf(sendmsg.name, "%s", name);nsize = sendto(sockfd, &sendmsg, sizeof(sendmsg), 0, (struct sockaddr *)&recvaddr, sizeof(recvaddr));if (-1 == nsize){perror("fail to sendto");return -1;}pthread_create(&tid_send, NULL, sendfun, NULL);pthread_create(&tid_recv, NULL, recvfun, NULL);pthread_join(tid_send, NULL);pthread_join(tid_recv, NULL);close(sockfd);return 0;
}

server.c

#include "head.h"struct address ClientIpList[100];int AddClientIp(struct sockaddr_in TmpAddr)
{int i = 0;for(i = 0;i < 100;++i){if(ClientIpList[i].mark == 0){ClientIpList[i].addr = TmpAddr;ClientIpList[i].mark = 1;break;}}return 0;
}
int DelClientIp(struct sockaddr_in TmpAddr)
{int i = 0;for(i = 0;i < 100;++i){if(0 == memcmp(&TmpAddr,&ClientIpList[i].addr,sizeof(TmpAddr))){ClientIpList[i].mark = 0;break;}}return 0;
}int BoardcastClientIp(int sockfd,struct sockaddr_in TmpAddr,struct msgbuf TmpMes)
{int i = 0;ssize_t nsize = 0;for(i = 0;i < 100;++i){if(ClientIpList[i].mark == 0){continue;}if(0 != memcmp(&TmpAddr,&ClientIpList[i].addr,sizeof(TmpAddr))){nsize = sendto(sockfd,&TmpMes,sizeof(TmpMes),0,(struct sockaddr *)&ClientIpList[i].addr,sizeof(ClientIpList[i].addr));if(-1 == nsize){continue;}}}return 0;
}int main(void)
{int sockfd = 0;int ret = 0;ssize_t nsize = 0;struct msgbuf recvmes;struct sockaddr_in recvaddr;struct sockaddr_in sendaddr;socklen_t addrlen = sizeof(sendaddr);recvaddr.sin_family = AF_INET;recvaddr.sin_port = htons(RECV_PORT);recvaddr.sin_addr.s_addr = INADDR_ANY;sockfd = socket(AF_INET, SOCK_DGRAM, 0);if (-1 == sockfd){perror("fail to socket");return -1;}ret = bind(sockfd, (struct sockaddr *)&recvaddr, sizeof(recvaddr));if (-1 == ret){perror("fail to bind");return -1;}memset(&ClientIpList,0,sizeof(ClientIpList));while (1){memset(&recvmes, 0, sizeof(recvmes));nsize = recvfrom(sockfd, &recvmes, sizeof(recvmes), 0,(struct sockaddr *)&sendaddr, &addrlen);if (-1 == nsize){perror("fail to recvfrom");return -1;}if(recvmes.type == MSG_TYPE_START){AddClientIp(sendaddr);recvmes.type = MSG_TYPE_CHAT;sprintf(recvmes.text,"%s",recvmes.name);}else if (recvmes.type == MSG_TYPE_END){DelClientIp(sendaddr);recvmes.type = MSG_TYPE_CHAT;sprintf(recvmes.text,"%s",recvmes.name);}if (recvmes.type == MSG_TYPE_CHAT){BoardcastClientIp(sockfd,sendaddr,recvmes);}}close(sockfd);return 0;
}

结果：