forked from Mirrorlandia_minetest/minetest
Socket-related cleanups
Improve error handling on Windows and reduce the size of the `Address` class
This commit is contained in:
sfan5
GitHub
parent
05573d6d8d
commit
0ea8df4d64
@ -1444,7 +1444,6 @@ bool Game::connectToServer(const GameStartData &start_data,
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connect_address.Resolve(start_data.address.c_str());
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if (connect_address.isZero()) { // i.e. INADDR_ANY, IN6ADDR_ANY
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//connect_address.Resolve("localhost");
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if (connect_address.isIPv6()) {
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IPv6AddressBytes addr_bytes;
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addr_bytes.bytes[15] = 1;
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@ -41,7 +41,9 @@ namespace fs
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* Windows *
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***********/
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#ifndef _WIN32_WINNT
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#define _WIN32_WINNT 0x0501
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#endif
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#include <windows.h>
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#include <shlwapi.h>
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#include <io.h>
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@ -87,38 +87,31 @@ Address::Address(const IPv6AddressBytes *ipv6_bytes, u16 port)
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setPort(port);
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}
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// Equality (address family, address and port must be equal)
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bool Address::operator==(const Address &address)
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// Equality (address family, IP and port must be equal)
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bool Address::operator==(const Address &other)
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{
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if (address.m_addr_family != m_addr_family || address.m_port != m_port)
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if (other.m_addr_family != m_addr_family || other.m_port != m_port)
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return false;
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if (m_addr_family == AF_INET) {
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return m_address.ipv4.sin_addr.s_addr ==
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address.m_address.ipv4.sin_addr.s_addr;
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return m_address.ipv4.s_addr == other.m_address.ipv4.s_addr;
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}
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if (m_addr_family == AF_INET6) {
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return memcmp(m_address.ipv6.sin6_addr.s6_addr,
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address.m_address.ipv6.sin6_addr.s6_addr, 16) == 0;
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return memcmp(m_address.ipv6.s6_addr,
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other.m_address.ipv6.s6_addr, 16) == 0;
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}
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return false;
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}
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bool Address::operator!=(const Address &address)
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{
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return !(*this == address);
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}
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void Address::Resolve(const char *name)
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{
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if (!name || name[0] == 0) {
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if (m_addr_family == AF_INET) {
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setAddress((u32)0);
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} else if (m_addr_family == AF_INET6) {
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setAddress((IPv6AddressBytes *)0);
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}
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if (m_addr_family == AF_INET)
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setAddress(static_cast<u32>(0));
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else if (m_addr_family == AF_INET6)
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setAddress(static_cast<IPv6AddressBytes*>(nullptr));
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return;
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}
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@ -126,9 +119,6 @@ void Address::Resolve(const char *name)
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memset(&hints, 0, sizeof(hints));
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// Setup hints
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hints.ai_socktype = 0;
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hints.ai_protocol = 0;
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hints.ai_flags = 0;
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if (g_settings->getBool("enable_ipv6")) {
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// AF_UNSPEC allows both IPv6 and IPv4 addresses to be returned
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hints.ai_family = AF_UNSPEC;
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@ -145,14 +135,13 @@ void Address::Resolve(const char *name)
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if (resolved->ai_family == AF_INET) {
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struct sockaddr_in *t = (struct sockaddr_in *)resolved->ai_addr;
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m_addr_family = AF_INET;
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m_address.ipv4 = *t;
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m_address.ipv4 = t->sin_addr;
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} else if (resolved->ai_family == AF_INET6) {
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struct sockaddr_in6 *t = (struct sockaddr_in6 *)resolved->ai_addr;
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m_addr_family = AF_INET6;
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m_address.ipv6 = *t;
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m_address.ipv6 = t->sin6_addr;
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} else {
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freeaddrinfo(resolved);
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throw ResolveError("");
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m_addr_family = 0;
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}
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freeaddrinfo(resolved);
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}
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@ -163,47 +152,37 @@ std::string Address::serializeString() const
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// windows XP doesnt have inet_ntop, maybe use better func
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#ifdef _WIN32
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if (m_addr_family == AF_INET) {
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u8 a, b, c, d;
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u32 addr;
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addr = ntohl(m_address.ipv4.sin_addr.s_addr);
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a = (addr & 0xFF000000) >> 24;
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b = (addr & 0x00FF0000) >> 16;
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c = (addr & 0x0000FF00) >> 8;
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d = (addr & 0x000000FF);
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return itos(a) + "." + itos(b) + "." + itos(c) + "." + itos(d);
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return inet_ntoa(m_address.ipv4);
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} else if (m_addr_family == AF_INET6) {
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std::ostringstream os;
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os << std::hex;
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for (int i = 0; i < 16; i += 2) {
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u16 section = (m_address.ipv6.sin6_addr.s6_addr[i] << 8) |
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(m_address.ipv6.sin6_addr.s6_addr[i + 1]);
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os << std::hex << section;
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u16 section = (m_address.ipv6.s6_addr[i] << 8) |
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(m_address.ipv6.s6_addr[i + 1]);
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os << section;
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if (i < 14)
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os << ":";
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}
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return os.str();
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} else
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return std::string("");
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} else {
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return "";
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}
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#else
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char str[INET6_ADDRSTRLEN];
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if (inet_ntop(m_addr_family,
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(m_addr_family == AF_INET)
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? (void *)&(m_address.ipv4.sin_addr)
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: (void *)&(m_address.ipv6.sin6_addr),
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str, INET6_ADDRSTRLEN) == NULL) {
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return std::string("");
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}
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return std::string(str);
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if (inet_ntop(m_addr_family, (void*) &m_address, str, sizeof(str)) == nullptr)
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return "";
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return str;
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#endif
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}
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struct sockaddr_in Address::getAddress() const
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struct in_addr Address::getAddress() const
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{
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return m_address.ipv4; // NOTE: NO PORT INCLUDED, use getPort()
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return m_address.ipv4;
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}
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struct sockaddr_in6 Address::getAddress6() const
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struct in6_addr Address::getAddress6() const
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{
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return m_address.ipv6; // NOTE: NO PORT INCLUDED, use getPort()
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return m_address.ipv6;
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}
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u16 Address::getPort() const
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@ -211,52 +190,39 @@ u16 Address::getPort() const
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return m_port;
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}
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int Address::getFamily() const
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{
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return m_addr_family;
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}
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bool Address::isIPv6() const
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{
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return m_addr_family == AF_INET6;
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}
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bool Address::isZero() const
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{
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if (m_addr_family == AF_INET) {
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return m_address.ipv4.sin_addr.s_addr == 0;
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return m_address.ipv4.s_addr == 0;
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}
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if (m_addr_family == AF_INET6) {
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static const char zero[16] = {0};
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return memcmp(m_address.ipv6.sin6_addr.s6_addr, zero, 16) == 0;
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return memcmp(m_address.ipv6.s6_addr, zero, 16) == 0;
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}
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return false;
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}
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void Address::setAddress(u32 address)
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{
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m_addr_family = AF_INET;
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m_address.ipv4.sin_family = AF_INET;
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m_address.ipv4.sin_addr.s_addr = htonl(address);
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m_address.ipv4.s_addr = htonl(address);
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}
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void Address::setAddress(u8 a, u8 b, u8 c, u8 d)
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{
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m_addr_family = AF_INET;
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m_address.ipv4.sin_family = AF_INET;
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u32 addr = htonl((a << 24) | (b << 16) | (c << 8) | d);
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m_address.ipv4.sin_addr.s_addr = addr;
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u32 addr = (a << 24) | (b << 16) | (c << 8) | d;
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setAddress(addr);
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}
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void Address::setAddress(const IPv6AddressBytes *ipv6_bytes)
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{
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m_addr_family = AF_INET6;
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m_address.ipv6.sin6_family = AF_INET6;
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if (ipv6_bytes)
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memcpy(m_address.ipv6.sin6_addr.s6_addr, ipv6_bytes->bytes, 16);
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memcpy(m_address.ipv6.s6_addr, ipv6_bytes->bytes, 16);
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else
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memset(m_address.ipv6.sin6_addr.s6_addr, 0, 16);
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memset(m_address.ipv6.s6_addr, 0, 16);
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}
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void Address::setPort(u16 port)
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@ -268,23 +234,26 @@ void Address::print(std::ostream *s) const
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{
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if (m_addr_family == AF_INET6)
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*s << "[" << serializeString() << "]:" << m_port;
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else
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else if (m_addr_family == AF_INET)
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*s << serializeString() << ":" << m_port;
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else
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*s << "(undefined)";
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}
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bool Address::isLocalhost() const
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{
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if (isIPv6()) {
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static const unsigned char localhost_bytes[] = {
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static const u8 localhost_bytes[] = {
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1};
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static const unsigned char mapped_ipv4_localhost[] = {
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static const u8 mapped_ipv4_localhost[] = {
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 0x7f, 0, 0, 0};
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auto addr = m_address.ipv6.sin6_addr.s6_addr;
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auto addr = m_address.ipv6.s6_addr;
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return memcmp(addr, localhost_bytes, 16) == 0 ||
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memcmp(addr, mapped_ipv4_localhost, 13) == 0;
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}
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return (m_address.ipv4.sin_addr.s_addr & 0xFF) == 0x7f;
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auto addr = ntohl(m_address.ipv4.s_addr);
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return (addr >> 24) == 0x7f;
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}
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@ -36,9 +36,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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#include "irrlichttypes.h"
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#include "networkexceptions.h"
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class IPv6AddressBytes
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struct IPv6AddressBytes
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{
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public:
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u8 bytes[16];
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IPv6AddressBytes() { memset(bytes, 0, 16); }
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};
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@ -50,30 +49,34 @@ public:
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Address(u32 address, u16 port);
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Address(u8 a, u8 b, u8 c, u8 d, u16 port);
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Address(const IPv6AddressBytes *ipv6_bytes, u16 port);
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bool operator==(const Address &address);
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bool operator!=(const Address &address);
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// Resolve() may throw ResolveError (address is unchanged in this case)
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void Resolve(const char *name);
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struct sockaddr_in getAddress() const;
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unsigned short getPort() const;
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void setAddress(u32 address);
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void setAddress(u8 a, u8 b, u8 c, u8 d);
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void setAddress(const IPv6AddressBytes *ipv6_bytes);
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struct sockaddr_in6 getAddress6() const;
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int getFamily() const;
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bool isIPv6() const;
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bool operator!=(const Address &address) { return !(*this == address); }
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struct in_addr getAddress() const;
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struct in6_addr getAddress6() const;
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u16 getPort() const;
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int getFamily() const { return m_addr_family; }
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bool isIPv6() const { return m_addr_family == AF_INET6; }
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bool isZero() const;
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void setPort(unsigned short port);
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void print(std::ostream *s) const;
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std::string serializeString() const;
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bool isLocalhost() const;
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// Resolve() may throw ResolveError (address is unchanged in this case)
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void Resolve(const char *name);
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void setAddress(u32 address);
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void setAddress(u8 a, u8 b, u8 c, u8 d);
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void setAddress(const IPv6AddressBytes *ipv6_bytes);
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void setPort(u16 port);
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private:
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unsigned int m_addr_family = 0;
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unsigned short m_addr_family = 0;
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union
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{
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struct sockaddr_in ipv4;
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struct sockaddr_in6 ipv6;
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struct in_addr ipv4;
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struct in6_addr ipv6;
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} m_address;
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u16 m_port = 0; // Port is separate from sockaddr structures
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};
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@ -23,14 +23,11 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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#include <iostream>
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#include <cstdlib>
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#include <cstring>
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#include <cerrno>
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#include <sstream>
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#include <iomanip>
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#include "util/string.h"
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#include "util/numeric.h"
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#include "constants.h"
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#include "debug.h"
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#include "settings.h"
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#include "log.h"
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#ifdef _WIN32
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@ -42,9 +39,10 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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#include <winsock2.h>
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#include <ws2tcpip.h>
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#define LAST_SOCKET_ERR() WSAGetLastError()
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typedef SOCKET socket_t;
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#define SOCKET_ERR_STR(e) itos(e)
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typedef int socklen_t;
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#else
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#include <cerrno>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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@ -53,7 +51,7 @@ typedef int socklen_t;
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#include <unistd.h>
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#include <arpa/inet.h>
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#define LAST_SOCKET_ERR() (errno)
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typedef int socket_t;
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#define SOCKET_ERR_STR(e) strerror(e)
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#endif
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// Set to true to enable verbose debug output
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@ -113,7 +111,7 @@ bool UDPSocket::init(bool ipv6, bool noExceptions)
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}
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throw SocketException(std::string("Failed to create socket: error ") +
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itos(LAST_SOCKET_ERR()));
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SOCKET_ERR_STR(LAST_SOCKET_ERR()));
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}
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setTimeoutMs(0);
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@ -153,40 +151,40 @@ void UDPSocket::Bind(Address addr)
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}
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if (addr.getFamily() != m_addr_family) {
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static const char *errmsg =
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const char *errmsg =
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"Socket and bind address families do not match";
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errorstream << "Bind failed: " << errmsg << std::endl;
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throw SocketException(errmsg);
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}
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int ret = 0;
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if (m_addr_family == AF_INET6) {
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struct sockaddr_in6 address;
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memset(&address, 0, sizeof(address));
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address = addr.getAddress6();
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address.sin6_family = AF_INET6;
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address.sin6_addr = addr.getAddress6();
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address.sin6_port = htons(addr.getPort());
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if (bind(m_handle, (const struct sockaddr *)&address,
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sizeof(struct sockaddr_in6)) < 0) {
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dstream << (int)m_handle << ": Bind failed: " << strerror(errno)
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<< std::endl;
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throw SocketException("Failed to bind socket");
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}
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ret = bind(m_handle, (const struct sockaddr *) &address,
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sizeof(struct sockaddr_in6));
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} else {
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struct sockaddr_in address;
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memset(&address, 0, sizeof(address));
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address = addr.getAddress();
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address.sin_family = AF_INET;
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address.sin_addr = addr.getAddress();
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address.sin_port = htons(addr.getPort());
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if (bind(m_handle, (const struct sockaddr *)&address,
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sizeof(struct sockaddr_in)) < 0) {
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dstream << (int)m_handle << ": Bind failed: " << strerror(errno)
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<< std::endl;
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throw SocketException("Failed to bind socket");
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}
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ret = bind(m_handle, (const struct sockaddr *) &address,
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sizeof(struct sockaddr_in));
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}
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if (ret < 0) {
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dstream << (int)m_handle << ": Bind failed: "
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<< SOCKET_ERR_STR(LAST_SOCKET_ERR()) << std::endl;
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throw SocketException("Failed to bind socket");
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}
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}
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@ -233,13 +231,19 @@ void UDPSocket::Send(const Address &destination, const void *data, int size)
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int sent;
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if (m_addr_family == AF_INET6) {
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struct sockaddr_in6 address = destination.getAddress6();
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struct sockaddr_in6 address = {0};
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address.sin6_family = AF_INET6;
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address.sin6_addr = destination.getAddress6();
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address.sin6_port = htons(destination.getPort());
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sent = sendto(m_handle, (const char *)data, size, 0,
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(struct sockaddr *)&address, sizeof(struct sockaddr_in6));
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} else {
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struct sockaddr_in address = destination.getAddress();
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struct sockaddr_in address = {0};
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address.sin_family = AF_INET;
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address.sin_addr = destination.getAddress();
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address.sin_port = htons(destination.getPort());
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sent = sendto(m_handle, (const char *)data, size, 0,
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(struct sockaddr *)&address, sizeof(struct sockaddr_in));
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}
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@ -267,9 +271,9 @@ int UDPSocket::Receive(Address &sender, void *data, int size)
|
||||
return -1;
|
||||
|
||||
u16 address_port = ntohs(address.sin6_port);
|
||||
IPv6AddressBytes bytes;
|
||||
memcpy(bytes.bytes, address.sin6_addr.s6_addr, 16);
|
||||
sender = Address(&bytes, address_port);
|
||||
const auto *bytes = reinterpret_cast<IPv6AddressBytes*>
|
||||
(address.sin6_addr.s6_addr);
|
||||
sender = Address(bytes, address_port);
|
||||
} else {
|
||||
struct sockaddr_in address;
|
||||
memset(&address, 0, sizeof(address));
|
||||
@ -341,7 +345,12 @@ bool UDPSocket::WaitData(int timeout_ms)
|
||||
if (result == 0)
|
||||
return false;
|
||||
|
||||
if (result < 0 && (errno == EINTR || errno == EBADF)) {
|
||||
int e = LAST_SOCKET_ERR();
|
||||
#ifdef _WIN32
|
||||
if (result < 0 && (e == WSAEINTR || e == WSAEBADF)) {
|
||||
#else
|
||||
if (result < 0 && (e == EINTR || e == EBADF)) {
|
||||
#endif
|
||||
// N.B. select() fails when sockets are destroyed on Connection's dtor
|
||||
// with EBADF. Instead of doing tricky synchronization, allow this
|
||||
// thread to exit but don't throw an exception.
|
||||
@ -349,18 +358,9 @@ bool UDPSocket::WaitData(int timeout_ms)
|
||||
}
|
||||
|
||||
if (result < 0) {
|
||||
dstream << m_handle << ": Select failed: " << strerror(errno)
|
||||
dstream << (int)m_handle << ": Select failed: " << SOCKET_ERR_STR(e)
|
||||
<< std::endl;
|
||||
|
||||
#ifdef _WIN32
|
||||
int e = WSAGetLastError();
|
||||
dstream << (int)m_handle << ": WSAGetLastError()=" << e << std::endl;
|
||||
if (e == 10004 /* WSAEINTR */ || e == 10009 /* WSAEBADF */) {
|
||||
infostream << "Ignoring WSAEINTR/WSAEBADF." << std::endl;
|
||||
return false;
|
||||
}
|
||||
#endif
|
||||
|
||||
throw SocketException("Select failed");
|
||||
} else if (!FD_ISSET(m_handle, &readset)) {
|
||||
// No data
|
||||
|
||||
@ -19,18 +19,6 @@ with this program; if not, write to the Free Software Foundation, Inc.,
|
||||
|
||||
#pragma once
|
||||
|
||||
#ifdef _WIN32
|
||||
#ifndef _WIN32_WINNT
|
||||
#define _WIN32_WINNT 0x0501
|
||||
#endif
|
||||
#include <windows.h>
|
||||
#include <winsock2.h>
|
||||
#include <ws2tcpip.h>
|
||||
#else
|
||||
#include <sys/socket.h>
|
||||
#include <netinet/in.h>
|
||||
#endif
|
||||
|
||||
#include <ostream>
|
||||
#include <cstring>
|
||||
#include "address.h"
|
||||
@ -53,8 +41,6 @@ public:
|
||||
|
||||
bool init(bool ipv6, bool noExceptions = false);
|
||||
|
||||
// void Close();
|
||||
// bool IsOpen();
|
||||
void Send(const Address &destination, const void *data, int size);
|
||||
// Returns -1 if there is no data
|
||||
int Receive(Address &sender, void *data, int size);
|
||||
|
||||
@ -507,8 +507,9 @@ void Server::start()
|
||||
<< " \\/ \\/ \\/ \\/ \\/ " << std::endl;
|
||||
actionstream << "World at [" << m_path_world << "]" << std::endl;
|
||||
actionstream << "Server for gameid=\"" << m_gamespec.id
|
||||
<< "\" listening on " << m_bind_addr.serializeString() << ":"
|
||||
<< m_bind_addr.getPort() << "." << std::endl;
|
||||
<< "\" listening on ";
|
||||
m_bind_addr.print(&actionstream);
|
||||
actionstream << "." << std::endl;
|
||||
}
|
||||
|
||||
void Server::stop()
|
||||
|
||||
@ -97,11 +97,11 @@ void TestSocket::testIPv4Socket()
|
||||
UASSERT(strncmp(sendbuffer, rcvbuffer, sizeof(sendbuffer)) == 0);
|
||||
|
||||
if (address != Address(0, 0, 0, 0, port)) {
|
||||
UASSERT(sender.getAddress().sin_addr.s_addr ==
|
||||
address.getAddress().sin_addr.s_addr);
|
||||
UASSERT(sender.getAddress().s_addr ==
|
||||
address.getAddress().s_addr);
|
||||
} else {
|
||||
UASSERT(sender.getAddress().sin_addr.s_addr ==
|
||||
Address(127, 0, 0, 1, 0).getAddress().sin_addr.s_addr);
|
||||
UASSERT(sender.getAddress().s_addr ==
|
||||
Address(127, 0, 0, 1, 0).getAddress().s_addr);
|
||||
}
|
||||
}
|
||||
|
||||
@ -128,7 +128,7 @@ void TestSocket::testIPv6Socket()
|
||||
|
||||
socket6.Bind(address6);
|
||||
|
||||
try {
|
||||
{
|
||||
socket6.Send(Address(&bytes, port), sendbuffer, sizeof(sendbuffer));
|
||||
|
||||
sleep_ms(50);
|
||||
@ -142,10 +142,8 @@ void TestSocket::testIPv6Socket()
|
||||
}
|
||||
//FIXME: This fails on some systems
|
||||
UASSERT(strncmp(sendbuffer, rcvbuffer, sizeof(sendbuffer)) == 0);
|
||||
UASSERT(memcmp(sender.getAddress6().sin6_addr.s6_addr,
|
||||
Address(&bytes, 0).getAddress6().sin6_addr.s6_addr, 16) == 0);
|
||||
} catch (SendFailedException &e) {
|
||||
errorstream << "IPv6 support enabled but not available!"
|
||||
<< std::endl;
|
||||
|
||||
UASSERT(memcmp(sender.getAddress6().s6_addr,
|
||||
Address(&bytes, 0).getAddress6().s6_addr, 16) == 0);
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user