proxychains-ng/tests/test_v4_in_v6.c

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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
static void v4_to_v6(const struct in_addr *v4, struct in6_addr *v6) {
memset(v6, 0, sizeof(*v6));
v6->s6_addr[10]=0xff;
v6->s6_addr[11]=0xff;
memcpy(&v6->s6_addr[12], &v4->s_addr, 4);
}
int main(void) {
struct addrinfo *result;
struct addrinfo *res;
const struct addrinfo hints = { .ai_family = AF_INET };
int error, sock;
/* resolve the domain name into a list of addresses */
error = getaddrinfo("www.example.com", NULL, &hints, &result);
if (error != 0) {
fprintf(stderr, "error in getaddrinfo: %s\n", gai_strerror(error));
return EXIT_FAILURE;
}
if((sock=socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) {
perror("socket");
return EXIT_FAILURE;
}
struct sockaddr_in6 a = { .sin6_family = AF_INET6,
.sin6_port = htons(80) };
v4_to_v6(&((struct sockaddr_in *)result->ai_addr)->sin_addr, &a.sin6_addr);
freeaddrinfo(result);
if((error = connect(sock, (struct sockaddr *)&a, sizeof(a))) == -1) {
perror("connect");
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}