110 lines
3.4 KiB
C++
110 lines
3.4 KiB
C++
#ifndef SOCKET_HELPERS_H
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#define SOCKET_HELPERS_H
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#include <string.h>
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#ifdef WINDOWS_ENABLED
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// Workaround mingw missing flags!
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#ifndef IPV6_V6ONLY
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#define IPV6_V6ONLY 27
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#endif
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#endif
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// helpers for sockaddr -> IP_Address and back, should work for posix and winsock. All implementations should use this
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static size_t _set_sockaddr(struct sockaddr_storage* p_addr, const IP_Address& p_ip, int p_port, IP_Address::AddrType p_sock_type = IP_Address::TYPE_ANY) {
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memset(p_addr, 0, sizeof(struct sockaddr_storage));
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// Dual stack (ANY) or matching ip type is required
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ERR_FAIL_COND_V(p_sock_type != IP_Address::TYPE_ANY && p_sock_type != p_ip.type,0);
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// IPv6 socket
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if (p_sock_type == IP_Address::TYPE_IPV6 || p_sock_type == IP_Address::TYPE_ANY) {
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struct sockaddr_in6* addr6 = (struct sockaddr_in6*)p_addr;
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addr6->sin6_family = AF_INET6;
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addr6->sin6_port = htons(p_port);
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if(p_ip.type == IP_Address::TYPE_IPV4) {
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// Remapping needed
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uint16_t base[8] = {0x0, 0x0, 0x0, 0x0, 0x0, 0xffff, p_ip.field16[0], p_ip.field16[1]};
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copymem(&addr6->sin6_addr.s6_addr, base, 16);
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} else {
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copymem(&addr6->sin6_addr.s6_addr, p_ip.field8, 16);
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}
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return sizeof(sockaddr_in6);
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} else { // IPv4 socket
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struct sockaddr_in* addr4 = (struct sockaddr_in*)p_addr;
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addr4->sin_family = AF_INET; // host byte order
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addr4->sin_port = htons(p_port); // short, network byte order
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addr4->sin_addr = *((struct in_addr*)&p_ip.field32[0]);
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return sizeof(sockaddr_in);
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};
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};
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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) {
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memset(p_addr, 0, sizeof(struct sockaddr_storage));
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if (p_address_type == IP_Address::TYPE_IPV4) {
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struct sockaddr_in* addr4 = (struct sockaddr_in*)p_addr;
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addr4->sin_family = AF_INET;
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addr4->sin_port = htons(p_port);
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addr4->sin_addr.s_addr = INADDR_ANY; // TODO: use accepted hosts list
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return sizeof(sockaddr_in);
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} else {
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struct sockaddr_in6* addr6 = (struct sockaddr_in6*)p_addr;
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addr6->sin6_family = AF_INET6;
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addr6->sin6_port = htons(p_port);
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addr6->sin6_addr = in6addr_any; // TODO: use accepted hosts list
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return sizeof(sockaddr_in6);
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};
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};
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static int _socket_create(IP_Address::AddrType p_type, int type, int protocol) {
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ERR_FAIL_COND_V(p_type > IP_Address::TYPE_ANY || p_type < IP_Address::TYPE_NONE, ERR_INVALID_PARAMETER);
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int family = p_type == IP_Address::TYPE_IPV4 ? AF_INET : AF_INET6;
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int sockfd = socket(family, type, protocol);
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ERR_FAIL_COND_V( sockfd == -1, -1 );
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if(family == AF_INET6) {
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// Select IPv4 over IPv6 mapping
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int opt = p_type != IP_Address::TYPE_ANY;
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if(setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY, (const char*)&opt, sizeof(opt)) != 0) {
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WARN_PRINT("Unable to set/unset IPv4 address mapping over IPv6");
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}
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}
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return sockfd;
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}
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static void _set_ip_addr_port(IP_Address& r_ip, int& r_port, struct sockaddr_storage* p_addr) {
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if (p_addr->ss_family == AF_INET) {
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r_ip.type = IP_Address::TYPE_IPV4;
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struct sockaddr_in* addr4 = (struct sockaddr_in*)p_addr;
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r_ip.field32[0] = (uint32_t)addr4->sin_addr.s_addr;
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r_port = ntohs(addr4->sin_port);
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} else if (p_addr->ss_family == AF_INET6) {
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r_ip.type = IP_Address::TYPE_IPV6;
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struct sockaddr_in6* addr6 = (struct sockaddr_in6*)p_addr;
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copymem(&r_ip.field8, addr6->sin6_addr.s6_addr, 16);
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r_port = ntohs(addr6->sin6_port);
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};
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};
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#endif
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