145 lines
3.8 KiB
C
145 lines
3.8 KiB
C
#include "lwip.h"
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#include "lwip/init.h"
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#include "lwip/netif.h"
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#include "lwip/opt.h"
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#include "lwip/mem.h"
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#include "lwip/memp.h"
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#include "lwip/udp.h"
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#include "lwip/timeouts.h"
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#include "netif/etharp.h"
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#define UDP_RX_BUFFER_SIZE 128
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void Error_Handler(void);
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struct udp_pcb *upcb;
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ip_addr_t remote_ip;
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const uint16_t remote_port = 5678;
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struct netif gnetif;
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ip4_addr_t ipaddr;
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ip4_addr_t netmask;
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ip4_addr_t gw;
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uint8_t IP_ADDRESS[4];
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uint8_t NETMASK_ADDRESS[4];
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uint8_t GATEWAY_ADDRESS[4];
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static char udp_receive_buffer[UDP_RX_BUFFER_SIZE];
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void udp_receive_callback(void *arg, struct udp_pcb *upcb, struct pbuf *p, const ip_addr_t *addr, u16_t port);
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void udp_receive_callback(void *arg, struct udp_pcb *upcb, struct pbuf *p, const ip_addr_t *addr, u16_t port) {
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strncpy(udp_receive_buffer,p->payload,p->len);
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udp_receive_buffer[p->len]=0;
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// printf("Test\r\n");
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printf("%s\r\n", udp_receive_buffer);
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pbuf_free(p);
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GPIO_ToggleBits(GPIOD, GPIO_Pin_0);
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}
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void udpServer_init(void)
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{
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ip_addr_t local_ip;
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uint16_t local_port = 1234;
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uint16_t remote_port = 5678;
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err_t err;
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upcb = udp_new();
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if(upcb != NULL) {
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IP_ADDR4(&local_ip, 192, 168, 1, 66);
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err = udp_bind(upcb, &local_ip, local_port);
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if (err == ERR_OK) {
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// printf("UDP bind\r\n");
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}
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// IP4_ADDR(&remote_ip, 192, 168, 1, 111);
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// err= udp_connect(upcb, &remote_ip, remote_port);
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if (err == ERR_OK) {
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// printf("UDP connect\r\n");
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udp_recv(upcb, udp_receive_callback, NULL);
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}
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}
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else
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{
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udp_remove(upcb);
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}
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}
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void udp_send_data(const char *data, u16_t len)
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{
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struct pbuf *p;
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err_t err;
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p = pbuf_alloc(PBUF_TRANSPORT, len, PBUF_RAM);
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if (p != NULL)
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{
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memcpy(p->payload, data, len);
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err = udp_sendto(upcb, p, &remote_ip, remote_port);
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pbuf_free(p);
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if (err != ERR_OK)
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{
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}
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}
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}
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void lwipInit(void)
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{
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IP_ADDRESS[0] = 192;
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IP_ADDRESS[1] = 168;
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IP_ADDRESS[2] = 1;
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IP_ADDRESS[3] = 66;
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NETMASK_ADDRESS[0] = 255;
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NETMASK_ADDRESS[1] = 255;
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NETMASK_ADDRESS[2] = 0;
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NETMASK_ADDRESS[3] = 0;
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GATEWAY_ADDRESS[0] = 0;
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GATEWAY_ADDRESS[1] = 0;
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GATEWAY_ADDRESS[2] = 0;
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GATEWAY_ADDRESS[3] = 0;
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/* Initilialize the LwIP stack without RTOS */
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lwip_init();
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IP4_ADDR(&ipaddr, IP_ADDRESS[0], IP_ADDRESS[1], IP_ADDRESS[2], IP_ADDRESS[3]);
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IP4_ADDR(&netmask, NETMASK_ADDRESS[0], NETMASK_ADDRESS[1] , NETMASK_ADDRESS[2], NETMASK_ADDRESS[3]);
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IP4_ADDR(&gw, GATEWAY_ADDRESS[0], GATEWAY_ADDRESS[1], GATEWAY_ADDRESS[2], GATEWAY_ADDRESS[3]);
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/* add the network interface (IPv4/IPv6) without RTOS */
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netif_add(&gnetif, &ipaddr, &netmask, &gw, NULL, ðernetif_init, ðernet_input);
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/* Registers the default network interface */
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netif_set_default(&gnetif);
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if (netif_is_link_up(&gnetif))
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{
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/* When the netif is fully configured this function must be called */
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netif_set_up(&gnetif);
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}
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else
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{
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/* When the netif link is down this function must be called */
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netif_set_down(&gnetif);
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}
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}
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/**
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* ----------------------------------------------------------------------
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* Function given to help user to continue LwIP Initialization
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* Up to user to complete or change this function ...
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* Up to user to call this function in main.c in while (1) of main(void)
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*-----------------------------------------------------------------------
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* Read a received packet from the Ethernet buffers
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* Send it to the lwIP stack for handling
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* Handle timeouts if LWIP_TIMERS is set and without RTOS
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* Handle the llink status if LWIP_NETIF_LINK_CALLBACK is set and without RTOS
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*/
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void lwipProcess(void)
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{
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ethernetif_input(&gnetif);
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sys_check_timeouts();
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}
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