How LWIP configures multiple servers with different IPs to connect？ - server

Question

#define DEST_IP_ADDR0 192
#define DEST_IP_ADDR1 168
#define DEST_IP_ADDR2 0
#define DEST_IP_ADDR3 200
IP4_ADDR(&server_ip, DEST_IP_ADDR0,DEST_IP_ADDR1,DEST_IP_ADDR2,DEST_IP_ADDR3);
In the original code, only the static IP of the host can be successfully connected to 192.168.0.200. Now I want any host with different IPs to be able to connect. How to achieve it, or only open one IP segment, only the static IP is 192.168.0.0- The host of 192.168.0.255 can only connect, how to modify the code to achieve it?
This is the code of TCPclient.c
#include "lwip/netif.h"
#include "lwip/ip.h"
#include "lwip/tcp.h"
#include "lwip/init.h"
#include "netif/etharp.h"
#include "lwip/udp.h"
#include "lwip/pbuf.h"
#include <stdio.h>
#include <string.h>
#include "main.h"
#include "tcpclient.h"
#define DEST_IP_ADDR0 192
#define DEST_IP_ADDR1 168
#define DEST_IP_ADDR2 0
#define DEST_IP_ADDR3 200
#define DEST_PORT 5001
#define UDP_SERVER_PORT 5002
#define UDP_CLIENT_PORT 5002
#define LOCAL_PORT 5001
char str_rev[100];
static void client_err(void *arg, err_t err)
{
printf("wrong!!\r\n");
printf("try again!!\r\n");
printf("close connect\r\n");
printf("again init\r\n");
TCP_Client_Init();
}
static err_t client_send(void *arg, struct tcp_pcb *tpcb)
{
uint8_t send_buf[]= "c";
tcp_write(tpcb, send_buf, sizeof(send_buf), 1);
return ERR_OK;
}
static err_t client_recv(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err)
{
if (p != NULL)
{
tcp_recved(tpcb, p->tot_len);
memset(str_rev, 0 , strlen(str_rev));
memcpy(str_rev, p -> payload, p -> tot_len);
memset(p->payload, 0 , p->tot_len);
pbuf_free(p);
}
else if (err == ERR_OK)
{
printf("dis connect!\r\n");
tcp_close(tpcb);
TCP_Client_Init();
}
return ERR_OK;
}
static err_t client_connected(void *arg, struct tcp_pcb *pcb, err_t err)
{
printf("connected ok!\r\n");
tcp_poll(pcb,client_send,2);
tcp_recv(pcb,client_recv);
return ERR_OK;
}
void TCP_Client_Init(void)
{
struct tcp_pcb *client_pcb = NULL;
ip4_addr_t server_ip;
client_pcb = tcp_new();
IP4_ADDR(&server_ip, DEST_IP_ADDR0,DEST_IP_ADDR1,DEST_IP_ADDR2,DEST_IP_ADDR3);
printf("start connect!\r\n");
tcp_connect(client_pcb, &server_ip, TCP_CLIENT_PORT, client_connected);
ip_set_option(client_pcb, SOF_KEEPALIVE);
printf("tcp_connect ok\r\n");
tcp_err(client_pcb, client_err);
printf("yes err f\r\n");
}