#include <lwip/sockets.h>
#define SENDER_PORT_NUM 6000
#define SENDER_IP_ADDR "192.136.23.20"
#define RECEIVER_PORT_NUM 6001
#define RECEIVER_IP_ADDR "192.136.23.21"
void main(void)
{
-
int socket_fd;
struct sockaddr_in sa;
int sent_data;
char recv_data_buffer[80];
/* Creates an TCP socket (SOCK_STREAM) with Internet Protocol
Family (PF_INET).
* Protocol family and Address family related. For example PF_INET
Protocol Family and AF_INET family are coupled.
*/
socket_fd = socket(PF_INET, SOCK_STREAM, 0);
if ( socket_fd < 0 )
{
-
printf("socket call failed");
exit(0);
}
memset(&sa, 0, sizeof(struct sockaddr_in));
sa.sin_family = AF_INET;
sa.sin_addr.s_addr = inet_addr(SENDER_IP_ADDR);
sa.sin_port = htons(SENDER_PORT_NUM);
/* Bind the TCP socket to the port SENDER_PORT_NUM and to the
current * machines IP address (Its defined by SENDER_IP_ADDR).
* Once bind is successful for UDP sockets application can
operate * on the socket descriptor for sending or receiving
data.
*/
if (bind(socket_fd, (struct sockaddr *)&sa, sizeof(struct sockaddr_in)) == -1)
{
printf("Bind to Port Number %d ,IP address %s failed\n",SENDER_PORT_NUM,SENDER_IP_ADDR);
close(socket_fd);
exit(1);
}
memset(&ra, 0, sizeof(struct sockaddr_in));
ra.sin_family = AF_INET;
ra.sin_addr.s_addr = inet_addr(RECEIVER_IP_ADDR);
ra.sin_port = htons(RECEIVER_PORT_NUM);
strcpy(data_buffer,"Hello World");
sent_data = send(socket_fd, data_buffer,sizeof("Hello World",0);
if(sent_data < 0)
{
-
printf("send failed\n");
close(socket_fd);
exit(2);
}
close(socket_fd);
}
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