linux網路程式設計多程序併發伺服器

伺服器端：

#include #include #include #include #include #include #include #include #define port 				1234

#define maxsize				1024
static int clientprocess(int connfd, struct sockaddr_in clientsock)
clientname[strlen(clientname)-1] = '\0';
printf("you got's a connection from %s, client name is %s\n",
inet_ntoa(clientsock.sin_addr), clientname);
while (1)
recvbuf[strlen(recvbuf)-1] = '\0';
printf("received client (%s) message :%s\n", clientname, recvbuf);
//將接收到的資訊加密返回給客戶端
for (i=0; i='a' && recvbuf[i]<='z') || (recvbuf[i]>='a' && recvbuf[i]<='z'))
}sendbuf[i] = recvbuf[i];
}		sendbuf[num-1] = '\0';
send(connfd, sendbuf, maxsize, 0);
}	close(connfd);
return 1;
}int main(int argc, char **argv)
int opt = so_reuseaddr;
setsockopt(listenfd, sol_socket, so_reuseaddr, &opt, sizeof opt);
bzero(&serversock, sizeof serversock);
serversock.sin_family = af_inet;
serversock.sin_port = htons(port);
serversock.sin_addr.s_addr = htonl(inaddr_any);
if (bind(listenfd, (struct sockaddr *)&serversock, sizeof serversock) < 0)
if (listen(listenfd, 5) < 0)
len = (socklen_t)(sizeof clientsock);
while (1)
//建立子程序處理客戶端的資訊
if ((pid = fork()) > 0)
else if (pid == 0)
else
}close(listenfd);
}

客戶端**：

#include #include #include #include #include #include #include #include #include #define port				1234

#define maxsize 				1024
static int clientprocess(file *fp, int connfd)
send(connfd, readline, maxsize, 0);
while (fgets(readline, maxsize, fp) != null)
send(connfd, readline, strlen(readline), 0);
num = recv(connfd, recvline, maxsize, 0);
if (num < 0)
recvline[num-1] = '\0';
printf("server message:%s\n", recvline);
}	return 1;
}int main(int argc, char **argv)
he = gethostbyname(argv[1]);
if (he == null)
sockfd = socket(af_inet, sock_stream, 0);
if (sockfd < 0)
bzero(&serversock, sizeof serversock);
serversock.sin_family = af_inet;
serversock.sin_port = htons(port);
serversock.sin_addr = *((struct in_addr *)he->h_addr);
if (connect(sockfd, (struct sockaddr *)&serversock, sizeof serversock) < 0)
clientprocess(stdin, sockfd);
close(sockfd);
return 1;
}

程式實現的功能很簡單，**寫的也比較通俗易懂，基本上沒什麼注釋！**在我自己的虛擬機器裡面除錯通過，編譯即可執行！

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