static void fetch_broadcast_info(uint16_t port)
{
broadcast_count = 0;
IP_ADAPTER_INFO *pAdapterInfo = malloc(sizeof(pAdapterInfo));
unsigned long ulOutBufLen = sizeof(pAdapterInfo);
if (pAdapterInfo == NULL) {
return;
}
if (GetAdaptersInfo(pAdapterInfo, &ulOutBufLen) == ERROR_BUFFER_OVERFLOW) {
free(pAdapterInfo);
pAdapterInfo = malloc(ulOutBufLen);
if (pAdapterInfo == NULL) {
return;
}
}
int ret;
if ((ret = GetAdaptersInfo(pAdapterInfo, &ulOutBufLen)) == NO_ERROR) {
IP_ADAPTER_INFO *pAdapter = pAdapterInfo;
while (pAdapter) {
IP gateway = {0}, subnet_mask = {0};
if (addr_parse_ip(pAdapter->IpAddressList.IpMask.String, &subnet_mask)
&& addr_parse_ip(pAdapter->GatewayList.IpAddress.String, &gateway)) {
if (gateway.family == AF_INET && subnet_mask.family == AF_INET) {
IP_Port *ip_port = &broadcast_ip_port[broadcast_count];
ip_port->ip.family = AF_INET;
uint32_t gateway_ip = ntohl(gateway.ip4.uint32), subnet_ip = ntohl(subnet_mask.ip4.uint32);
uint32_t broadcast_ip = gateway_ip + ~subnet_ip - 1;
ip_port->ip.ip4.uint32 = htonl(broadcast_ip);
ip_port->port = port;
broadcast_count++;
if (broadcast_count >= MAX_INTERFACES) {
return;
}
}
}
pAdapter = pAdapter->Next;
}
}
if (pAdapterInfo) {
free(pAdapterInfo);
}
}
/* Like tox_bootstrap_from_address but for TCP relays only.
*
* return 0 on failure.
* return 1 on success.
*/
int tox_add_tcp_relay(Tox *tox, const char *address, uint16_t port, const uint8_t *public_key)
{
Messenger *m = tox;
IP_Port ip_port, ip_port_v4;
if (!addr_parse_ip(address, &ip_port.ip)) {
if (m->options.udp_disabled) /* Disable DNS when udp is disabled. */
return 0;
IP *ip_extra = NULL;
ip_init(&ip_port.ip, m->options.ipv6enabled);
if (m->options.ipv6enabled) {
/* setup for getting BOTH: an IPv6 AND an IPv4 address */
ip_port.ip.family = AF_UNSPEC;
ip_reset(&ip_port_v4.ip);
ip_extra = &ip_port_v4.ip;
}
if (!addr_resolve(address, &ip_port.ip, ip_extra))
return 0;
}
ip_port.port = htons(port);
add_tcp_relay(m->net_crypto, ip_port, public_key);
onion_add_path_node(m->onion_c, ip_port, public_key); //TODO: move this
return 1;
}
/*
* addr_resolve_or_parse_ip
* resolves string into an IP address
*
* address: a hostname (or something parseable to an IP address)
* to: to.family MUST be initialized, either set to a specific IP version
* (AF_INET/AF_INET6) or to the unspecified AF_UNSPEC (= 0), if both
* IP versions are acceptable
* extra can be NULL and is only set in special circumstances, see returns
*
* returns in *tro a matching address (IPv6 or IPv4)
* returns in *extra, if not NULL, an IPv4 address, if to->family was AF_UNSPEC
* returns 1 on success
* returns 0 on failure
*/
int addr_resolve_or_parse_ip(const char *address, IP *to, IP *extra)
{
if (!addr_resolve(address, to, extra))
if (!addr_parse_ip(address, to))
return 0;
return 1;
};
static void fetch_broadcast_info(uint16_t port)
{
IP_ADAPTER_INFO *pAdapterInfo = (IP_ADAPTER_INFO *)malloc(sizeof(IP_ADAPTER_INFO));
unsigned long ulOutBufLen = sizeof(IP_ADAPTER_INFO);
if (pAdapterInfo == nullptr) {
return;
}
if (GetAdaptersInfo(pAdapterInfo, &ulOutBufLen) == ERROR_BUFFER_OVERFLOW) {
free(pAdapterInfo);
pAdapterInfo = (IP_ADAPTER_INFO *)malloc(ulOutBufLen);
if (pAdapterInfo == nullptr) {
return;
}
}
/* We copy these to the static variables broadcast_* only at the end of fetch_broadcast_info().
* The intention is to ensure that even if multiple threads enter fetch_broadcast_info() concurrently, only valid
* interfaces will be set to be broadcast to.
* */
int count = 0;
IP_Port ip_ports[MAX_INTERFACES];
int ret;
if ((ret = GetAdaptersInfo(pAdapterInfo, &ulOutBufLen)) == NO_ERROR) {
IP_ADAPTER_INFO *pAdapter = pAdapterInfo;
while (pAdapter) {
IP gateway = {0}, subnet_mask = {0};
if (addr_parse_ip(pAdapter->IpAddressList.IpMask.String, &subnet_mask)
&& addr_parse_ip(pAdapter->GatewayList.IpAddress.String, &gateway)) {
if (gateway.family == TOX_AF_INET && subnet_mask.family == TOX_AF_INET) {
IP_Port *ip_port = &ip_ports[count];
ip_port->ip.family = TOX_AF_INET;
uint32_t gateway_ip = net_ntohl(gateway.ip.v4.uint32), subnet_ip = net_ntohl(subnet_mask.ip.v4.uint32);
uint32_t broadcast_ip = gateway_ip + ~subnet_ip - 1;
ip_port->ip.ip.v4.uint32 = net_htonl(broadcast_ip);
ip_port->port = port;
count++;
if (count >= MAX_INTERFACES) {
break;
}
}
}
pAdapter = pAdapter->Next;
}
}
if (pAdapterInfo) {
free(pAdapterInfo);
}
broadcast_count = count;
for (uint32_t i = 0; i < count; i++) {
broadcast_ip_ports[i] = ip_ports[i];
}
}