Linux Socket UDP对等通信

/*socket udo示例程序* 由于UDP是一种对等通信，是不区分服务器端和客户端的*/#include <sys/stat.h>#include <fcntl.h>#include <errno.h>#include <netdb.h>#include <sys/types.h>#include <sys/socket.h>#include <netinet/in.h>#include <arpa/inet.h>#include <stdio.h>#include <string.h>#include <stdlib.h>#include <unistd.h>#define SERVER_PORT 5555int main(){int peerSocket;struct sockaddr_in self_addr;struct sockaddr_in peer_addr;int peer_len = sizeof(peer_addr);int iDataNum;char recvbuf[200];char sendbuf[200];if((peerSocket = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {perror("socket");return 1;}bzero(&self_addr, sizeof(self_addr));self_addr.sin_family = AF_INET;self_addr.sin_port = htons(SERVER_PORT);self_addr.sin_addr.s_addr = inet_addr("127.0.0.1");if(bind(peerSocket, (struct sockaddr*)&self_addr, sizeof(self_addr)) < 0){perror("connect");return 1;}while(1){printf("Input your world:>");scanf("%s", sendbuf);printf("\n");sendto(peerSocket, sendbuf, strlen(sendbuf), 0, (struct sockaddr*)&self_addr, sizeof(self_addr));iDataNum = recvfrom(peerSocket, recvbuf, 1024, 0, (struct sockaddr*)&peer_addr, (socklen_t*)&peer_len);recvbuf[iDataNum] = '\0';printf("recv from %s\n", recvbuf);}return 0;}