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#ifndef SOCKET_HELPERS_H
#define SOCKET_HELPERS_H
#include <string.h>
#if defined(__MINGW32__ ) && (!defined(__MINGW64_VERSION_MAJOR) || __MINGW64_VERSION_MAJOR < 4)
// Workaround for mingw-w64 < 4.0
#ifndef IPV6_V6ONLY
#define IPV6_V6ONLY 27
#endif
#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, IP::Type p_sock_type = IP::TYPE_ANY) {
memset(p_addr, 0, sizeof(struct sockaddr_storage));
ERR_FAIL_COND_V(p_ip==IP_Address(),0);
// IPv6 socket
if (p_sock_type == IP::TYPE_IPV6 || p_sock_type == IP::TYPE_ANY) {
// IPv6 only socket with IPv4 address
ERR_FAIL_COND_V(p_sock_type == IP::TYPE_IPV6 && p_ip.is_ipv4(),0);
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.get_ipv6(), 16);
return sizeof(sockaddr_in6);
} else { // IPv4 socket
// IPv4 socket with IPv6 address
ERR_FAIL_COND_V(!p_ip.is_ipv4(),0);
uint32_t ipv4 = *((uint32_t *)p_ip.get_ipv4());
struct sockaddr_in* addr4 = (struct sockaddr_in*)p_addr;
addr4->sin_family = AF_INET;
addr4->sin_port = htons(p_port); // short, network byte order
copymem(&addr4->sin_addr.s_addr, p_ip.get_ipv4(), 16);
return sizeof(sockaddr_in);
};
};
static size_t _set_listen_sockaddr(struct sockaddr_storage* p_addr, int p_port, IP::Type p_sock_type, const List<String> *p_accepted_hosts) {
memset(p_addr, 0, sizeof(struct sockaddr_storage));
if (p_sock_type == IP::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::Type p_type, int type, int protocol) {
ERR_FAIL_COND_V(p_type > IP::TYPE_ANY || p_type < IP::TYPE_NONE, ERR_INVALID_PARAMETER);
int family = p_type == IP::TYPE_IPV4 ? AF_INET : AF_INET6;
int sockfd = socket(family, type, protocol);
ERR_FAIL_COND_V( sockfd == -1, -1 );
if(family == AF_INET6) {
// Select IPv4 over IPv6 mapping
int opt = p_type != IP::TYPE_ANY;
if(setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY, (const char*)&opt, sizeof(opt)) != 0) {
WARN_PRINT("Unable to set/unset 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) {
struct sockaddr_in* addr4 = (struct sockaddr_in*)p_addr;
r_ip.set_ipv4((uint8_t *)&(addr4->sin_addr.s_addr));
r_port = ntohs(addr4->sin_port);
} else if (p_addr->ss_family == AF_INET6) {
struct sockaddr_in6* addr6 = (struct sockaddr_in6*)p_addr;
r_ip.set_ipv6(addr6->sin6_addr.s6_addr);
r_port = ntohs(addr6->sin6_port);
};
};
#endif
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