#include <stdio.h>
|
#include <errno.h>
|
#include <string.h>
|
#include <unistd.h>
|
#include <sys/types.h>
|
#include <sys/socket.h>
|
#include <arpa/inet.h>
|
#include <stdlib.h>
|
#include <getopt.h>
|
|
#define MSG_STR "Hello LingYun IoT Studio\n"
|
|
void print_usage(char *progname)
|
{
|
printf("%s usage: \n", progname);
|
printf("-i(--ipaddr): sepcify server IP address\n");
|
printf("-p(--port): sepcify server port.\n");
|
printf("-h(--Help): print this help information.\n");
|
|
return ;
|
}
|
|
int main(int argc, char **argv)
|
{
|
int sockfd = -1;
|
int rv = -1;
|
struct sockaddr_in servaddr;
|
char *servip = NULL;
|
int port = 0;
|
char buf[1024];
|
int ch;
|
struct option opts[] = {
|
{"ipaddr", required_argument, NULL, 'i'},
|
{"port", required_argument, NULL, 'p'},
|
{"help", no_argument, NULL, 'h'},
|
{NULL, 0, NULL, 0}
|
};
|
|
while( (ch=getopt_long(argc, argv, "i:p:h", opts, NULL)) != -1 )
|
{
|
switch(ch)
|
{
|
case 'i':
|
servip=optarg;
|
break;
|
|
case 'p':
|
port=atoi(optarg);
|
break;
|
|
case 'h':
|
print_usage(argv[0]);
|
return 0;
|
}
|
|
}
|
|
if( !servip || !port )
|
{
|
print_usage(argv[0]);
|
return 0;
|
}
|
|
|
sockfd=socket(AF_INET, SOCK_STREAM, 0);
|
if(sockfd < 0)
|
{
|
printf("Create socket failure: %s\n", strerror(errno));
|
return -1;
|
}
|
printf("Create socket[%d] successfully!\n", sockfd);
|
|
memset(&servaddr, 0, sizeof(servaddr));
|
servaddr.sin_family=AF_INET;
|
servaddr.sin_port = htons(port);
|
inet_aton(servip, &servaddr.sin_addr);
|
rv=connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr));
|
if(rv < 0)
|
{
|
printf("Connect to server[%s:%d] failure: %s\n",
|
servip, port, strerror(errno));
|
return -2;
|
}
|
|
printf("Connect to server[%s:%d] successfully!\n", servip, port);
|
|
while(1)
|
{
|
rv=write(sockfd, MSG_STR, strlen(MSG_STR));
|
if(rv < 0)
|
{
|
printf("Write to server by sockfd[%d] failure: %s\n",
|
sockfd, strerror(errno));
|
break;
|
}
|
|
memset(buf, 0, sizeof(buf));
|
rv=read(sockfd, buf, sizeof(buf));
|
if( rv < 0)
|
{
|
printf("Read data from server by sockfd[%d] failure: %s\n",
|
sockfd, strerror(errno));
|
break;
|
}
|
else if( rv == 0)
|
{
|
printf("Socket[%d] get disconnected\n", sockfd);
|
break;
|
}
|
else if( rv > 0 )
|
{
|
printf("Read %d bytes data from Server: %s\n",
|
rv, buf);
|
}
|
}
|
|
|
close(sockfd);
|
}
|
