/**
* Prints the ``port'' followed by host address ``ha'' to ``dst''. The string
* written to ``dst'' is always NUL-terminated unless ``size'' is zero. If
* ``size'' is too small, the string will be truncated.
*
* @param dst the destination buffer; may be NULL iff ``size'' is zero.
* @param port the port number.
* @param ha the host address.
* @param size the size of ``dst'' in bytes.
*
* @return The length of the resulting string assuming ``size'' is sufficient.
*/
size_t
host_port_addr_to_string_buf(uint16 port, const host_addr_t ha,
char *dst, size_t size)
{
char port_buf[UINT32_DEC_BUFLEN];
char host_buf[HOST_ADDR_BUFLEN];
size_t n;
uint32_to_string_buf(port, port_buf, sizeof port_buf);
host_addr_to_string_buf(ha, host_buf, sizeof host_buf);
switch (host_addr_net(ha)) {
case NET_TYPE_IPV6:
n = concat_strings(dst, size, port_buf, ":[", host_buf, "]",
(void *) 0);
break;
case NET_TYPE_IPV4:
n = concat_strings(dst, size, port_buf, ":", host_buf, (void *) 0);
break;
default:
n = g_strlcpy(dst, host_buf, size);
}
return n;
}
/**
* Same as host_addr_to_string(), but in another static buffer.
*/
const char *
host_addr_to_string2(const host_addr_t ha)
{
static char buf[HOST_ADDR_BUFLEN];
size_t n;
n = host_addr_to_string_buf(ha, buf, sizeof buf);
g_assert(n < sizeof buf);
return buf;
}
/**
* Same as host_addr_to_string(), but in another static buffer.
*/
const char *
host_addr_to_string2(const host_addr_t ha)
{
buf_t *b = buf_private(G_STRFUNC, HOST_ADDR_BUFLEN);
char *p = buf_data(b);
size_t len, n = buf_size(b);
len = host_addr_to_string_buf(ha, p, n);
g_assert(len < n);
return p;
}
/**
* Add a port forwarding (*:ext_port -> addr:port) [IP or PPP connection].
*
* @param usd the UPnP service to contact
* @param proto mapping protocol
* @param ext_port the mapped external port for which we want the mapping
* @param int_addr the internal client address
* @param int_port the internal port for which we want the mapping
* @param desc comment description
* @param lease lease duration (0 = permanent)
* @param cb callback to invoke when reply is available
* @param arg additional callback argument
*
* @return UPnP request handle if the SOAP RPC was initiated, NULL otherwise
* (in which case callbacks will never be called).
*/
upnp_ctrl_t *
upnp_ctrl_AddPortMapping(const upnp_service_t *usd,
enum upnp_map_proto proto, guint16 ext_port,
host_addr_t int_addr, guint16 int_port,
const char *desc, time_delta_t lease,
upnp_ctrl_cb_t cb, void *arg)
{
nv_pair_t *argv[8];
char ext_port_buf[UINT16_DEC_BUFLEN];
char int_port_buf[UINT16_DEC_BUFLEN];
char int_addr_buf[HOST_ADDR_BUFLEN];
char lease_buf[UINT32_DEC_BUFLEN];
const char *protocol;
const char *description;
g_assert(lease >= 0);
g_assert(lease <= MAX_INT_VAL(gint32));
g_assert(ext_port != 0);
g_assert(int_port != 0);
int32_to_string_buf(ext_port, ext_port_buf, sizeof ext_port_buf);
int32_to_string_buf(int_port, int_port_buf, sizeof int_port_buf);
host_addr_to_string_buf(int_addr, int_addr_buf, sizeof int_addr_buf);
protocol = upnp_map_proto_to_string(proto);
int32_to_string_buf(lease, lease_buf, sizeof lease_buf);
description = str_smsg("%s (%s)", desc, protocol);
argv[0] = nv_pair_make_static_str(ARG_REMOTE_HOST, EMPTY); /* Wildcard */
argv[1] = nv_pair_make_static_str(ARG_EXTERNAL_PORT, ext_port_buf);
argv[2] = nv_pair_make_static_str(ARG_PROTOCOL, protocol);
argv[3] = nv_pair_make_static_str(ARG_INTERNAL_PORT, int_port_buf);
argv[4] = nv_pair_make_static_str(ARG_INTERNAL_CLIENT, int_addr_buf);
argv[5] = nv_pair_make_static_str(ARG_ENABLED, ONE); /* Enable! */
argv[6] = nv_pair_make_static_str(ARG_PORTMAP_DESC, description);
argv[7] = nv_pair_make_static_str(ARG_LEASE_DURATION, lease_buf);
/*
* TODO: when talking to a v2 WANIPConnection service, we can use
* the AddAnyPortMapping() call. This will require that GTKG maintains
* knowledge about the remote port so that it can advertise that remote
* port instead of the local listening port.
*
* Attempts must be made to get the same external port for both TCP and UDP,
* or this will create problems to servents assuming that they will always
* be identical (like GTKG does when it uses the TCP listening port of
* a remote host to send a push-proxy request via UDP)..
* --RAM, 2011-01-18
*/
return upnp_ctrl_launch(usd, "AddPortMapping",
argv, G_N_ELEMENTS(argv), cb, arg,
NULL);
}
/**
* Resolves an IP address to a hostname per DNS.
*
* @param ha The host address to resolve.
* @return On success, the hostname is returned. Otherwise, NULL is
* returned. The resulting string points to a static buffer.
*/
const char *
host_addr_to_name(host_addr_t addr)
{
socket_addr_t sa;
if (host_addr_can_convert(addr, NET_TYPE_IPV4)) {
(void) host_addr_convert(addr, &addr, NET_TYPE_IPV4);
}
if (0 == socket_addr_set(&sa, addr, 0)) {
return NULL;
}
#ifdef HAS_GETNAMEINFO
{
static char host[1025];
int error;
error = getnameinfo(socket_addr_get_const_sockaddr(&sa),
socket_addr_get_len(&sa), host, sizeof host, NULL, 0, 0);
if (error) {
char buf[HOST_ADDR_BUFLEN];
host_addr_to_string_buf(addr, buf, sizeof buf);
g_message("getnameinfo() failed for \"%s\": %s",
buf, gai_strerror(error));
return NULL;
}
return host;
}
#else /* !HAS_GETNAMEINFO */
{
const struct hostent *he;
socklen_t len = 0;
const char *ptr = NULL;
switch (host_addr_net(addr)) {
case NET_TYPE_IPV4:
ptr = cast_to_gchar_ptr(&sa.inet4.sin_addr);
len = sizeof sa.inet4.sin_addr;
break;
case NET_TYPE_IPV6:
#ifdef HAS_IPV6
ptr = cast_to_gchar_ptr(&sa.inet6.sin6_addr);
len = sizeof sa.inet6.sin6_addr;
break;
#endif /* HAS_IPV6 */
case NET_TYPE_LOCAL:
case NET_TYPE_NONE:
return NULL;
}
g_return_val_if_fail(ptr, NULL);
g_return_val_if_fail(0 != len, NULL);
he = gethostbyaddr(ptr, len, socket_addr_get_family(&sa));
if (!he) {
char buf[HOST_ADDR_BUFLEN];
host_addr_to_string_buf(addr, buf, sizeof buf);
gethostbyname_error(buf);
return NULL;
}
return he->h_name;
}
#endif /* HAS_GETNAMEINFO */
}
