metalsvm/newlib/examples/client.c

/* derived form http://www.cs.put.poznan.pl/csobaniec/examples/sockets/client-tcp-simple.c */

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>

#define QUIT	0
#define S2C	1
#define MAX_BUF 100
#define N	10

int main(int argc, char* argv[])
{
	int i, cmd;
	int sockd;
	int count;
	struct sockaddr_in serv_name;
	char buf[MAX_BUF];
	int status;

	if (argc < 3)
	{
		fprintf(stderr, "Usage: %s ip_address port_number\n", argv[0]);
		exit(1);
	}
	/* create a socket */
	sockd = socket(AF_INET, SOCK_STREAM, 0);
	if (sockd == -1)
	{
		perror("Socket creation");
		exit(1);
	}

	memset(&serv_name, 0x00, sizeof(serv_name));
	/* server address */ 
	serv_name.sin_family = AF_INET;
	inet_aton(argv[1], &serv_name.sin_addr);
	serv_name.sin_port = htons(atoi(argv[2]));

	/* connect to the server */
	status = connect(sockd, (struct sockaddr*)&serv_name, sizeof(serv_name));
	if (status == -1)
	{
		perror("Connection error");
		exit(1);
	}

	for(i=0, cmd=S2C; i<N; i++) {
		// request new message
		write(sockd, &cmd, sizeof(int));

		// dump current value of i
		snprintf(buf, MAX_BUF, "%d. ", i);
		write(1, buf, strlen(buf));

		// read new message and dump the incoming message on the screen
		count = read(sockd, buf, MAX_BUF);
		write(1, buf, count);
	}
	cmd = QUIT;
	write(sockd, &cmd, sizeof(int));

	close(sockd);

	printf("Leave client...\n");

	return 0;
}