static void udp_client_receive_callback(void *arg, struct udp_pcb *upcb,struct pbuf *p, const ip_addr_t *addr, u16_t port) { uint32_t i; /* 数据回传 */ udp_send(upcb, p);//回传设备本身 // udp_sendto(upcb, p, addr, port);// /***打印端口***/ printf("ip_server:%d...
void UDP_Receive(void *arg,struct udp_pcb *upcb,struct pbuf* p,struct ip_addr *addr,u16_t port) { struct ip_addr dAddr = *addr; u16 length; u8 buf[255]; if(p!=NULL) { //udp_sendto(upcb,p,&dAddr,port); //pbuf_free(p); Length =p->len; //这里取到的Length即为收到的...
udp_sendto_if填充udp的首部,计算校验和后,调用ip.c中的ip_output_if() ip_output_if填充ip的首部,计算校验和,调用netif->output(),而它在ethernetif_init()时,已经注册为etharp.c中的etharp_output(); etharp_output调用同一文件下的etharp_send_ip() etharp_send_ip填充ethhdr后,调用netif->linkoutput...
packet_size,bursts,delay):# Create a UDP socketsock=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)# Generate random payloadpayload=bytes(random.getrandbits(8)for_inrange(packet_size))try:whileTrue:for_inrange(bursts):# Send packetsock.sendto(payload, (target_ip,target_port))# Delay betwee...
(p->payload, msg, sizeof(msg));udp_sendto(upcb,p,&ip_BoatCast,60003);pbuf_free(p);...
socket(1, Sn_MR_UDP, local_port1, 0);//设置Socket1 /*如果是两个Socket本地端口号一样的应用,需用户自己判断远端端口号区分处理收到的数据*/ /*如果是两个独立的端口号那种就是正常两个Socket*/ sendto(0, buffff, sizeof(buffff), remote_ip, remote_port);//Socket0发送 sendto(0, buffff1...
udp_recv(udp_server_pcb,udp_demo_recv,NULL);//接收回调函数 } }6.添加组播发送函数 void multicast_send_data(unsigned char * data,unsigned short len) { struct pbuf *p = pbuf_alloc(PBUF_TRANSPORT,len, PBUF_RAM); memcpy(p->payload, data, len); udp_sendto(udp_server_pcb, p,(...
void udp_broadcast_send(void) { int sockfd; struct sockaddr_in broadcast_addr; char message[] = "Hello, UDP Broadcast!"; // 创建UDP套接字sockfd = socket(AF_INET, SOCK_DGRAM, 0); if (sockfd < 0) { // 错误处理,打印日志 return; ...
另一个是 UDP 的 echo 计数(udp_times),同样,我们在程序认为发送成功时才计数: staticvoidudp_echoserver_recv_callback(...) { if(ERR_OK==udp_sendto(upcb,p,addr,port))udp_times++; pbuf_free(p); } 1. 2. 3. 4. 5. 另外,我们在 low_level_output 的各个出错部分添加出错统计(output_...
err=udp_sendto(lwip_ntp_udp_pcb, send_pbuf, &sip, send_port); pbuf_free(send_pbuf); if (err!=0) break; } } return err; } //接收 void lwip_ntp_udp_rev(void *arg, struct udp_pcb *upcb, struct pbuf *p, struct ip_addr *addr, u16_t port) ...