使用uip1.0协议栈中的uip_close()主动断开客户端连接没反应，也就是客户端收不到断开消息，我的断开处理是在
uip_len = enc28j60_packet_receive(uip_buf, UIP_BUFSIZE );
if (uip_len > 0)
{
if(DATABUF->type == htons(UIP_ETHTYPE_IP))
{
uip_arp_ipin();
uip_input();
if(uip_len > 0)
{
uip_arp_out();
enc28j60_packet_send(uip_buf, uip_len);
}
}
else if(DATABUF->type == htons(UIP_ETHTYPE_ARP))
{
uip_arp_arpin();
if(uip_len > 0)
enc28j60_packet_send(uip_buf, uip_len);
}
}
else
{
//在这里处理断开连接,加了心跳的断开处理，但是断开没任何反应客户端仍然可以发送数据及UIP可以收取数据，希望大家能帮下忙解决，在这先谢谢大家。
}
*********************************************/ #include <avr/io.h> #include "ip_arp_udp.h" #include "enc28j60.h" #include "timeout.h" #include "avr_compat.h" #include "net.h" #include "stdlib.h" // please modify the following two lines. mac and ip have to be unique // in your local area network. You can not have the same numbers in // two devices: static uint8_t mymac[6] = {0x13,0x33,0x37,0x71,0x77,0x20}; static uint8_t myip[4] = {192,168,1,10}; static uint16_t myport =1200; // listen port for udp // how did I get the mac addr? Translate the first 3 numbers into ascii is: TUX #define BUTTON_PORT PORTD #define BUTTON_PIN PIND #define BUTTON_BIT PD2 #define BUFFER_SIZE 250 static uint8_t buf[BUFFER_SIZE+1]; int main(void){ uint16_t plen; uint8_t i=0; uint8_t payloadlen=0; char message[100]={'/','e','l','l','o',0,0,0,',',0,0}; // set the clock speed to 8MHz // set the clock prescaler. First write CLKPCE to enable setting of clock the // next four instructions. CLKPR=(1<<CLKPCE); CLKPR=0; // 8 MHZ /* enable PB0, reset as output */ DDRB|= (1<<DDB0); /* set output to gnd, reset the ethernet chip */ PORTB &= ~(1<<PB0); delay_ms(20); /* set output to Vcc, reset inactive */ PORTB|= (1<<PB0); delay_ms(100); // LED /* enable PB1, LED as output */ DDRB|= (1<<DDB1); /* set output to Vcc, LED off */ PORTB|= (1<<PB1); //Enable pullup on pin D PORTD|= (1<<PD0); /*initialize enc28j60*/ enc28j60Init(mymac); delay_ms(20); /* Magjack leds configuration, see enc28j60 datasheet, page 11 */ // LEDB=yellow LEDA=green // // 0x476 is PHLCON LEDA=links status, LEDB=receive/transmit // enc28j60PhyWrite(PHLCON,0b0000 0100 0111 01 10); enc28j60PhyWrite(PHLCON,0x476); delay_ms(20); /* set output to GND, red LED on */ PORTB &= ~(1<<PB1); i=1; //init the ethernet/ip layer: init_ip_arp_udp(mymac,myip); while(1){ // get the next new packet: plen = enc28j60PacketReceive(BUFFER_SIZE, buf); /*plen will be unequal to zero if there is a valid * packet (without crc error) */ if(plen==0){ continue; } // arp is broadcast if unknown but a host may also // verify the mac address by sending it to // a unicast address. if(eth_type_is_arp_and_my_ip(buf,plen)){ make_arp_answer_from_request(buf,plen); continue; } // check if ip packets (icmp or udp) are for us: if(eth_type_is_ip_and_my_ip(buf,plen)==0){ continue; } if (i){ /* set output to Vcc, LED off */ PORTB|= (1<<PB1); i=0; }else{ /* set output to GND, LED on */ PORTB &= ~(1<<PB1); i=1; } if(buf[IP_PROTO_P]==IP_PROTO_ICMP_V && buf[ICMP_TYPE_P]==ICMP_TYPE_ECHOREQUEST_V){ // a ping packet, let's send pong make_echo_reply_from_request(buf,plen); continue; } if (buf[IP_PROTO_P]==IP_PROTO_UDP_V){ payloadlen=buf[UDP_LEN_L_P]-UDP_HEADER_LEN; if (buf[UDP_DATA_P]=='t' && payloadlen==12){ //itoa(buf,message,10); while(1){ if (bit_is_clear(PIND,PD0)){ make_udp_reply_from_request(buf,message,16,myport); delay_ms(50); while(bit_is_clear(PIND,PD0)) { } delay_ms(50); } } } } } return (0); }
由客户端主动连接，通信，断开都正常。
但是，UIP的服务端有时候不进入某些消息回调。
我经常有碰到，连接中断消息、连接断开消息、通信ACK消息。有接收不到的
只能在应用层上再做一个处理。