52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
|
|
|
|
#include "../basic.h"
|
|
|
|
int main(int argc, char **argv) {
|
|
int sockfd;
|
|
struct sockaddr_in servaddr;
|
|
|
|
if (argc != 3){
|
|
printf("usage: daytimecli <indirizzoIP> <porta> \n");
|
|
exit(0);
|
|
}
|
|
if( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0 ){
|
|
printf("socket error\n");
|
|
exit(0);
|
|
}
|
|
bzero(&servaddr, sizeof(servaddr));
|
|
servaddr.sin_family = AF_INET;
|
|
servaddr.sin_port = htons(atoi(argv[2])); /* server port */
|
|
|
|
if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0){
|
|
printf("inet_pton error for %s\n", argv[1]);
|
|
exit(0);
|
|
}
|
|
if (connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0){
|
|
printf("connect error\n");
|
|
exit(0);
|
|
}
|
|
|
|
struct sockaddr_in r_server_local_addr;
|
|
unsigned int r_server_local_addr_len = sizeof(r_server_local_addr);
|
|
|
|
char * socket_buffer = (char *) malloc (r_server_local_addr_len) ;
|
|
int ridden;
|
|
ridden = read (sockfd, socket_buffer,r_server_local_addr_len );
|
|
fprintf(stdout,"Ho letto %d\n bytes",ridden);
|
|
|
|
memcpy (&r_server_local_addr,socket_buffer, r_server_local_addr_len);
|
|
|
|
|
|
char buff[INET_ADDRSTRLEN];
|
|
short port;
|
|
|
|
inet_ntop(AF_INET, &(r_server_local_addr.sin_addr), buff, INET_ADDRSTRLEN);// get ip
|
|
port = ntohs(r_server_local_addr.sin_port);// get port
|
|
|
|
fprintf (stdout,"%s%c%hu\n",buff,':',port);
|
|
|
|
|
|
exit(0);
|
|
}
|