/*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 5555 int 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; }