Witam.
Mam taki kod:
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
void error(char *msg) {
perror(msg);
exit(0);
}
int main(int argc, char *argv[]) {
int sockfd, portno, n, rc;
struct sockaddr_in6 serv_addr;
struct hostent *server;
struct addrinfo hints, *res;
struct in6_addr serveraddr;
char buffer[256] = "This is a string from client!";
if (argc < 3) {
fprintf(stderr, "Usage: %s \n", argv[0]);
exit(0);
}
printf("\nIPv6 TCP Client Started...\n");
memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_NUMERICSERV;
hints.ai_family = AF_INET6;
hints.ai_socktype = SOCK_STREAM;
rc = getaddrinfo(argv[2],argv[1], &hints, &res);
if (rc != 0)
{
printf("\nHosta nie znaleziono --> %s\n", gai_strerror(rc));
if (rc == EAI_SYSTEM)
perror("\nNiepowodzenie getaddrinfo()");
} else {
printf("\n getaddrinfo [OK]");
}
sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (sockfd < 0)
{
perror("Niepowodzenie socket()");
} else {
printf("socket created [OK]");
}
//Sockets Layer Call: connect()
if (connect(sockfd, res->ai_addr,res->ai_addrlen) < 0) {
error("ERROR connecting");
} else {
printf("Connect OK");
}
close(sockfd);
return 0;
}
funkcja connect zwraca mi "invalid argument". Wie ktoś dlaczego ?
dzięki z góry.