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#ifndef SOCKET_HELPERS_H
#define SOCKET_HELPERS_H
#include <string.h>
#ifdef WINDOWS_ENABLED
// Workaround mingw missing flags!
#ifndef IPV6_V6ONLY
#define IPV6_V6ONLY 27
#endif
#endif
#ifdef UWP_ENABLED
#define in6addr_any IN6ADDR_ANY_INIT
#endif
// helpers for sockaddr -> IP_Address and back, should work for posix and winsock. All implementations should use this
static size_t _set_sockaddr(struct sockaddr_storage* p_addr, const IP_Address& p_ip, int p_port) {
memset(p_addr, 0, sizeof(struct sockaddr_storage));
if (p_ip.type == IP_Address::TYPE_IPV6) {
struct sockaddr_in6* addr6 = (struct sockaddr_in6*)p_addr;
addr6->sin6_family = AF_INET6;
addr6->sin6_port = htons(p_port);
copymem(&addr6->sin6_addr.s6_addr, p_ip.field8, 16);
return sizeof(sockaddr_in6);
} else {
struct sockaddr_in* addr4 = (struct sockaddr_in*)p_addr;
addr4->sin_family = AF_INET; // host byte order
addr4->sin_port = htons(p_port); // short, network byte order
addr4->sin_addr = *((struct in_addr*)&p_ip.field32[0]);
return sizeof(sockaddr_in);
};
};
static size_t _set_listen_sockaddr(struct sockaddr_storage* p_addr, int p_port, IP_Address::AddrType p_address_type, const List<String> *p_accepted_hosts) {
memset(p_addr, 0, sizeof(struct sockaddr_storage));
if (p_address_type == IP_Address::TYPE_IPV4) {
struct sockaddr_in* addr4 = (struct sockaddr_in*)p_addr;
addr4->sin_family = AF_INET;
addr4->sin_port = htons(p_port);
addr4->sin_addr.s_addr = INADDR_ANY; // TODO: use accepted hosts list
return sizeof(sockaddr_in);
} else {
struct sockaddr_in6* addr6 = (struct sockaddr_in6*)p_addr;
addr6->sin6_family = AF_INET6;
addr6->sin6_port = htons(p_port);
addr6->sin6_addr = in6addr_any; // TODO: use accepted hosts list
return sizeof(sockaddr_in6);
};
};
static int _socket_create(IP_Address::AddrType p_type, int type, int protocol) {
ERR_FAIL_COND_V(p_type > IP_Address::TYPE_ANY || p_type < IP_Address::TYPE_NONE, ERR_INVALID_PARAMETER);
int family = p_type == IP_Address::TYPE_IPV4 ? AF_INET : AF_INET6;
int sockfd = socket(family, type, protocol);
ERR_FAIL_COND_V( sockfd == -1, -1 );
if(family == AF_INET6) {
// Ensure IPv4 over IPv6 is enabled
int no = 0;
if(setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY, (const char*)&no, sizeof(no)) != 0) {
WARN_PRINT("Unable to set IPv4 address mapping over IPv6");
}
}
return sockfd;
}
static void _set_ip_addr_port(IP_Address& r_ip, int& r_port, struct sockaddr_storage* p_addr) {
if (p_addr->ss_family == AF_INET) {
r_ip.type = IP_Address::TYPE_IPV4;
struct sockaddr_in* addr4 = (struct sockaddr_in*)p_addr;
r_ip.field32[0] = (uint32_t)addr4->sin_addr.s_addr;
r_port = ntohs(addr4->sin_port);
} else if (p_addr->ss_family == AF_INET6) {
r_ip.type = IP_Address::TYPE_IPV6;
struct sockaddr_in6* addr6 = (struct sockaddr_in6*)p_addr;
copymem(&addr6->sin6_addr.s6_addr, r_ip.field8, 16);
r_port = ntohs(addr6->sin6_port);
};
};
#endif
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