UB-E02 Technical Reference Guide
4.2.2 For Linux
The program is a sample of printing “EPSON
/* TCP00 programming sample for LINUX
*HOW TO BUILD
*cc ltcp.c
*/
#include <stdio.h> #include <netdb.h>
int main(int argc, char* argv[])
{
int sock;
struct sockaddr_in addr;
if (argc != 2) {
printf("usage: ltcp <ip address>\n"); exit(1);
}
/* create socket */
sock = socket(AF_INET, SOCK_STREAM, 0); if (sock < 0) {
perror("socket()");
exit(1);
}
/* initialize the parameter */ memset(&addr, 0, sizeof(addr)); addr.sin_family = AF_INET; addr.sin_port = htons(9100); addr.sin_addr.s_addr = inet_addr(argv[1]);
/* connect */
if (connect(sock, (struct sockaddr*)&addr, sizeof(addr)) < 0) { perror("connect()");
}
printf("connected\n");
/* send data */
send(sock, "EPSON\n", 6, 0);
/* close socket */ close(sock);
return 0;
}
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