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client.c
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client.c
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/****************** CLIENT CODE ****************/
#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
unsigned int ffi_connect(void)
{
int sock;
struct sockaddr_in serverAddr;
socklen_t addr_size;
/*---- Create the socket. The three arguments are: ----*/
/* 1) Internet domain 2) Stream socket 3) Default protocol (TCP in this case) */
sock = socket(PF_INET, SOCK_STREAM, 0);
if(sock < 0)
{
exit(-1);
}
/*---- Configure settings of the server address struct ----*/
/* Address family = Internet */
serverAddr.sin_family = AF_INET;
/* Set port number, using htons function to use proper byte order */
serverAddr.sin_port = htons(7891);
/* Set IP address to localhost */
serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
/* Set all bits of the padding field to 0 */
memset(serverAddr.sin_zero, '\0', sizeof serverAddr.sin_zero);
/*---- Connect the socket to the server using the address struct ----*/
addr_size = sizeof serverAddr;
if(!connect(sock, (struct sockaddr *) &serverAddr, addr_size))
{
exit(-1);
}
return sock;
}
unsigned int ffi_recv(unsigned int sock, unsigned int count, char *buffer)
{
ssize_t ret;
/*---- Read the message from the server into the buffer ----*/
ret = recv(sock, buffer, count, 0);
if(ret == 0)
{
exit(0); // normal shutdown
}
if(ret < 0)
{
exit(-1);
}
return ret;
}
int main(){
int sock;
char buffer[1024];
sock = ffi_connect();
unsigned int n = ffi_recv(sock, sizeof(buffer), buffer);
/*---- Print the received message ----*/
printf("Data received(%d): %s", n, buffer);
return 0;
}