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libipc-old/examples/simple-tcp-client.c

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#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include "../src/ipc.h"
#include "../src/utils.h"
/**
* tcp connection to localhost port argv[1]
* message 1: pong
* message 2: echo with libipc format
*
* [messagetype | len | usertype | payload ]
* 1 B | 4 B | 1 B | ]
*/
int connection (char *ipstr, int port)
{
int sockfd;
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SECURE_DECLARATION (struct sockaddr_in, server);
socklen_t addrlen;
// socket factory
T_PERROR_Q (((sockfd = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1), "socket creation", EXIT_FAILURE);
// init remote addr structure and other params
server.sin_family = AF_INET;
server.sin_port = htons (port);
addrlen = sizeof (struct sockaddr_in);
// get addr from command line and convert it
T_PERROR_Q ((inet_pton (AF_INET, ipstr, &server.sin_addr) <= 0), "inet_pton", EXIT_FAILURE);
printf ("Trying to connect to the remote host\n");
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T_PERROR_Q ((connect (sockfd, (struct sockaddr *)&server, addrlen) == -1), "connection", EXIT_FAILURE);
printf ("Connection OK\n");
return sockfd;
}
void send_receive (int sockfd)
{
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SECURE_BUFFER_DECLARATION (unsigned char, buf, BUFSIZ);
int paylen;
// first, send service name "pong"
// send string
T_PERROR_Q ((send (sockfd, "pong", 4, 0) == -1), "sending a message", EXIT_FAILURE);
printf ("message 'pong' sent\n");
T_PERROR_Q (((paylen = recv (sockfd, buf, BUFSIZ, 0)) <= 0), "cannot connect to networkd", EXIT_FAILURE);
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print_hexa ("should be 'OK'", buf, paylen);
memset (buf, 0, BUFSIZ);
// 2 | 6 | 0 | "coucou"
// 1 B | 4 B | 1 | 6 B
ipc_message_raw_serialize ((char *)buf, MSG_TYPE_DATA, 42, "coucou", 6);
printf("\n");
print_hexa ("message to send", buf, 12);
printf("\n");
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// sleep (1);
T_PERROR_Q ((send (sockfd, buf, 12, 0) == -1), "sending a message", EXIT_FAILURE);
printf ("message 'coucou' sent\n");
memset (buf, 0, BUFSIZ);
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// receiving a message
T_PERROR_Q (((paylen = recv (sockfd, buf, BUFSIZ, 0)) < 0), "receiving a message", EXIT_FAILURE);
printf("\n");
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if (paylen == 0) {
fprintf (stderr, "error: disconnection from the server\n");
exit (EXIT_FAILURE);
}
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print_hexa ("RECEIVED MESSAGE", buf, paylen);
}
int main (int argc, char *argv[])
{
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char *ipstr = "127.0.0.1";
int port = 9000;
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if (argc == 2) {
port = atoi (argv[1]);
} else if (argc == 3) {
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ipstr = argv[1];
port = atoi (argv[2]);
}
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int sockfd = connection (ipstr, port);
send_receive (sockfd);
printf ("\nDisconnection\n");
// close the socket
close (sockfd);
return EXIT_SUCCESS;
}