static int ftp_init_transfer(void)
{
struct sockaddr_in sa;
unsigned char *a, *p;
unsigned char pac[6];
if(!ftp_connected())
goto err0;
if (!(ftp->data = sock_create())) {
goto err0;
}
sock_copy(ftp->data, ftp->ctrl);
if(ftp_is_passive()) {
if(ftp_pasv(pac) != 0) {
goto err1;
}
sock_getsockname(ftp->ctrl, &sa);
memcpy(&sa.sin_addr, pac, (size_t)4);
memcpy(&sa.sin_port, pac+4, (size_t)2);
if(sock_connect_addr(ftp->data, &sa) == -1)
goto err1;
} else {
sock_listen(ftp->data);
a = (unsigned char *)&ftp->data->local_addr.sin_addr;
p = (unsigned char *)&ftp->data->local_addr.sin_port;
ftp_set_tmp_verbosity(vbError);
ftp_cmd("PORT %d,%d,%d,%d,%d,%d",
a[0], a[1], a[2], a[3], p[0], p[1]);
if(ftp->code != ctComplete)
goto err1;
}
sock_throughput(ftp->data);
return 0;
err1:
sock_destroy(ftp->data);
err0:
return -1;
}
static int ftp_init_transfer(void)
{
if (!ftp_connected())
return -1;
if (!sock_dup(ftp->ctrl, &ftp->data))
return -1;
if (ftp_is_passive())
{
ftp_trace("Initializing passive connection.\n");
struct sockaddr_storage sa;
memcpy(&sa, sock_remote_addr(ftp->ctrl), sizeof(struct sockaddr_storage));
unsigned char pac[6] = { 0 };
unsigned short ipv6_port = { 0 };
if (!ftp_pasv(sa.ss_family != AF_INET, pac, &ipv6_port))
{
ftp_trace("PASV/EPSV failed.\n");
sock_destroy(ftp->data);
ftp->data = NULL;
return -1;
}
socklen_t len = sizeof(struct sockaddr_in);
if (sa.ss_family == AF_INET)
{
memcpy(&((struct sockaddr_in*)&sa)->sin_addr, pac, (size_t)4);
memcpy(&((struct sockaddr_in*)&sa)->sin_port, pac+4, (size_t)2);
}
#ifdef HAVE_IPV6
else if (sa.ss_family == AF_INET6)
{
((struct sockaddr_in6*)&sa)->sin6_port = htons(ipv6_port);
len = sizeof(struct sockaddr_in6);
}
#endif
else
{
ftp_trace("Do not know how to handle family %d.\n", sa.ss_family);
sock_destroy(ftp->data);
ftp->data = NULL;
return -1;
}
struct sockaddr_storage tmp;
memcpy(&tmp, sock_remote_addr(ftp->ctrl), sizeof(struct sockaddr_storage));
if (is_reserved((struct sockaddr*) &sa) ||
is_multicast((struct sockaddr*) &sa) ||
(is_private((struct sockaddr*) &sa) != is_private((struct sockaddr*) &tmp)) ||
(is_loopback((struct sockaddr*) &sa) != is_loopback((struct sockaddr*) &tmp)))
{
// Invalid address returned by PASV. Replace with address from control
// socket.
ftp_err(_("Address returned by PASV seems to be incorrect.\n"));
((struct sockaddr_in*)&sa)->sin_addr = ((struct sockaddr_in*)&tmp)->sin_addr;
}
if (!sock_connect_addr(ftp->data, (struct sockaddr*) &sa, len))
{
ftp_trace("Could not connect to address from PASV/EPSV.\n");
perror("connect()");
sock_destroy(ftp->data);
ftp->data = NULL;
return -1;
}
} else {
ftp_trace("Initializing active connection.\n");
const struct sockaddr* local = sock_local_addr(ftp->data);
sock_listen(ftp->data, local->sa_family);
if (local->sa_family == AF_INET)
{
struct sockaddr_in* tmp = (struct sockaddr_in*)local;
unsigned char* a = (unsigned char *)&tmp->sin_addr;
unsigned char* p = (unsigned char *)&tmp->sin_port;
ftp_set_tmp_verbosity(vbError);
ftp_cmd("PORT %d,%d,%d,%d,%d,%d",
a[0], a[1], a[2], a[3], p[0], p[1]);
}
#ifdef HAVE_IPV6
else if (local->sa_family == AF_INET6)
{
char* addr = printable_address(local);
ftp_set_tmp_verbosity(vbError);
ftp_cmd("EPRT |2|%s|%u|", addr, ntohs(((struct sockaddr_in6*)local)->sin6_port));
free(addr);
}
#endif
else
{
ftp_trace("Do not know how to handle family %d.\n", local->sa_family);
sock_destroy(ftp->data);
ftp->data = NULL;
return -1;
}
if(ftp->code != ctComplete)
{
ftp_trace("PORT/EPRT not successful\n");
sock_destroy(ftp->data);
ftp->data = NULL;
return -1;
}
}
sock_throughput(ftp->data);
return 0;
}
static int ftp_init_transfer(void)
{
struct sockaddr_storage sa;
unsigned char *a, *p;
if(!ftp_connected())
return -1;
if (!(ftp->data = sock_create())) {
return -1;
}
sock_copy(ftp->data, ftp->ctrl);
if (ftp_is_passive())
{
memcpy(&sa, sock_remote_addr(ftp->ctrl), sizeof(struct sockaddr_storage));
unsigned char pac[6];
unsigned short ipv6_port;
if (!ftp_pasv(sa.ss_family != AF_INET, pac, &ipv6_port))
goto err1;
socklen_t len = sizeof(struct sockaddr_in);
if (sa.ss_family == AF_INET)
{
memcpy(&((struct sockaddr_in*)&sa)->sin_addr, pac, (size_t)4);
memcpy(&((struct sockaddr_in*)&sa)->sin_port, pac+4, (size_t)2);
}
#ifdef HAVE_IPV6
else if (sa.ss_family == AF_INET6)
{
((struct sockaddr_in6*)&sa)->sin6_port = htons(ipv6_port);
len = sizeof(struct sockaddr_in6);
}
#endif
else
return -1;
struct sockaddr_storage tmp;
memcpy(&tmp, sock_remote_addr(ftp->ctrl), sizeof(struct sockaddr_storage));
if (is_reserved((struct sockaddr*) &sa) ||
is_multicast((struct sockaddr*) &sa) ||
(is_private((struct sockaddr*) &sa) != is_private((struct sockaddr*) &tmp)) ||
(is_loopback((struct sockaddr*) &sa) != is_loopback((struct sockaddr*) &tmp)))
{
// Invalid address returned by PASV. Replace with address from control
// socket.
ftp_err(_("Address returned by PASV seems to be incorrect.\n"));
((struct sockaddr_in*)&sa)->sin_addr = ((struct sockaddr_in*)&tmp)->sin_addr;
}
if (!sock_connect_addr(ftp->data, (struct sockaddr*) &sa, len))
{
perror("connect()");
goto err1;
}
} else {
const struct sockaddr* local = sock_local_addr(ftp->data);
sock_listen(ftp->data, local->sa_family);
if (local->sa_family == AF_INET)
{
struct sockaddr_in* tmp = (struct sockaddr_in*)local;
a = (unsigned char *)&tmp->sin_addr;
p = (unsigned char *)&tmp->sin_port;
ftp_set_tmp_verbosity(vbError);
ftp_cmd("PORT %d,%d,%d,%d,%d,%d",
a[0], a[1], a[2], a[3], p[0], p[1]);
}
#ifdef HAVE_IPV6
else if (local->sa_family == AF_INET6)
{
char* addr = printable_address(local);
ftp_set_tmp_verbosity(vbError);
ftp_cmd("EPRT |2|%s|%u", addr, ntohs(((struct sockaddr_in6*)local)->sin6_port));
free(addr);
}
#endif
else
goto err1;
if(ftp->code != ctComplete)
goto err1;
}
sock_throughput(ftp->data);
return 0;
err1:
sock_destroy(ftp->data);
ftp->data = 0;
return -1;
}
