Implement base Socket class

Fix derp in IPAddress::resolve

CMakeLists.txt

@@ -154,10 +154,12 @@ add_library(AthenaZelda EXCLUDE_FROM_ALL
 )
 
 add_library(AthenaNet
+    src/sockwrap.c
     src/Athena/Socket.cpp
     src/Athena/OAuth.cpp
     src/Athena/IPAddress.cpp
 
+    include/sockwrap.h
     include/Athena/Socket.hpp
     include/Athena/OAuth.hpp
     include/Athena/IPAddress.hpp)

include/Athena/Socket.hpp

@@ -1,15 +1,43 @@
 #ifndef SOCKET_HPP
 #define SOCKET_HPP
 
+#include "Athena/Global.hpp"
+#include "sockwrap.h"
+
 namespace Athena
 {
 namespace net
 {
+
 class Socket
 {
+    // Disable copying
 public:
+    enum Type
+    {
+        TCP,
+        UDP
+    };
+
+    explicit Socket(Type type = TCP);
+
+    virtual ~Socket() { close() ; }
+
+    void setBlocking(bool blocking);
+    bool isBlocking() const { return m_isBlocking; }
+protected:
+    sockhandle_t handle() { return m_handle; }
+    void create();
+    void close();
 private:
+    // Disable copying
+    Socket(const Socket&)=delete;
+    Socket& operator=(const Socket&)=delete;
+    Type         m_type;
+    sockhandle_t m_handle;
+    bool         m_isBlocking;
 };
+
 }
 }
 

include/sockwrap.h

@@ -0,0 +1,61 @@
+#ifndef SOCKWRAP_H
+#define SOCKWRAP_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#ifdef _WIN32
+#ifdef _WIN32_WINDOWS
+#undef _WIN32_WINDOWS
+#endif
+#ifdef _WIN32_WINNT
+#undef _WIN32_WINNT
+#endif
+#define _WIN32_WINDOWS 0x0501
+#define _WIN32_WINNT   0x0501
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#include <basetsd>
+
+typedef UINT_PTR sockhandle_t;
+typedef int      addrlen_t;
+#else
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <unistd.h>
+
+typedef int32_t   sockhandle_t;
+typedef socklen_t addrlen_t;
+#endif
+
+#define ANY_PORT 0
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// TODO: More granular errors
+typedef enum
+{
+    SS_Done,
+    SS_NotReady,
+    SS_Partial,
+    SS_Disconnected,
+    SS_Error
+} sockstatus_t;
+
+struct sockaddr_in sock_create_address(uint32_t address, uint16_t port);
+void sock_close_socket(sockhandle_t sock);
+void sock_set_blocking(sockhandle_t sock, bool block);
+sockstatus_t sock_error_status();
+sockhandle_t sock_invalid_socket();
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

src/Athena/IPAddress.cpp

@@ -1,25 +1,5 @@
 #include "Athena/IPAddress.hpp"
-
-#ifdef __unix__
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netinet/tcp.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-#include <unistd.h>
-#elif defined(_WIN32)
-#ifdef _WIN32_WINDOWS
-#undef _WIN32_WINDOWS
-#endif
-#ifdef _WIN32_WINNT
-#undef _WIN32_WINNT
-#endif
-#define _WIN32_WINDOWS 0x0501
-#define _WIN32_WINNT   0x0501
-#include <winsock2.h>
-#include <ws2tcpip.h>
-#endif
+#include "sockwrap.h" // To resolve local IP
 
 namespace Athena
 {
@@ -55,6 +35,35 @@ const std::string IPAddress::toString() const
     return inet_ntoa(address);
 }
 
+const atUint32 IPAddress::toInt() const
+{
+    return ntohl(m_address);
+}
+
+IPAddress IPAddress::localAddress()
+{
+    sockhandle_t sock = socket(PF_INET, SOCK_DGRAM, 0);
+    if (sock == sock_invalid_socket())
+        return IPAddress();
+
+    struct sockaddr_in address = sock_create_address(ntohl(INADDR_LOOPBACK), 9);
+    if (connect(sock, reinterpret_cast<sockaddr*>(&address), sizeof(struct sockaddr_in)) == -1)
+    {
+        sock_close_socket(sock);
+        return IPAddress();
+    }
+
+    addrlen_t size = sizeof(address);
+    if (getsockname(sock, reinterpret_cast<sockaddr*>(&address), &size) == -1)
+    {
+        sock_close_socket(sock);
+        return IPAddress();
+    }
+
+    sock_close_socket(sock);
+    return IPAddress(ntohl(address.sin_addr.s_addr));
+}
+
 void IPAddress::resolve(const std::string& address)
 {
     if (address == "0.0.0.0")
@@ -72,10 +81,11 @@ void IPAddress::resolve(const std::string& address)
         atUint32 ip = inet_addr(address.c_str());
         if (ip == INADDR_NONE)
         {
-            addrinfo hints = {0};
+            addrinfo hints;
+            memset(&hints, 0, sizeof(addrinfo));
             hints.ai_family = AF_INET;
             addrinfo* result = nullptr;
-            if (getaddrinfo(address.c_str(), NULL, &hints, &result))
+            if (getaddrinfo(address.c_str(), nullptr, &hints, &result) == 0)
             {
                 if (result)
                 {

src/Athena/Socket.cpp

@@ -1 +1,53 @@
 #include "Athena/Socket.hpp"
+
+namespace Athena
+{
+namespace net
+{
+
+Socket::Socket(Socket::Type type)
+    : m_type(type),
+      m_handle(sock_invalid_socket()),
+      m_isBlocking(true)
+{}
+
+void Socket::create()
+{
+    if (m_handle == sock_invalid_socket())
+    {
+        m_handle = socket(PF_INET, m_type == TCP ? SOCK_STREAM : SOCK_DGRAM, 0);
+        setBlocking(m_isBlocking);
+
+        int yes = 1;
+        if (m_type == TCP)
+        {
+            // Disable Nagle algorithm
+            if (setsockopt(m_handle, IPPROTO_TCP, TCP_NODELAY, &yes, sizeof(int)) == -1)
+                atWarning("Failed to set socket option \"TCP_NODELAY\", TCP packets will be buffered");
+
+#ifdef __APPLE__
+            if (setsockopt(m_handle, SOL_SOCKET, SO_NOSIGPIPE, &yes, sizeof(int)) == -1)
+                atWarning("Failed to set socket option \"SO_NOSIGPIPE\"");
+#endif
+        }
+        else
+        {
+            if (setsockopt(m_handle, SOL_SOCKET, SO_BROADCAST, &yes, sizeof(int)) == -1)
+                atWarning("Failed to enable broadcast on UDP socket");
+        }
+    }
+}
+
+void Socket::close()
+{
+    sock_close_socket(m_handle);
+    m_handle = sock_invalid_socket();
+}
+
+void Socket::setBlocking(bool blocking)
+{
+    sock_set_blocking(m_handle, blocking);
+}
+
+}
+}

src/sockwrap.c

@@ -0,0 +1,93 @@
+#include "sockwrap.h"
+
+#ifndef _WIN32
+#include <errno.h>
+#include <fcntl.h>
+#endif
+
+struct sockaddr_in sock_create_address(uint32_t address, uint16_t port)
+{
+    struct sockaddr_in addr = {0};
+    addr.sin_addr.s_addr = htonl(address);
+    addr.sin_family = AF_INET;
+    addr.sin_port = htons(port);
+
+#ifdef __APPLE__
+    addr.sin_len = sizeof(addr);
+#endif
+
+    return addr;
+}
+
+void sock_close_socket(sockhandle_t sock)
+{
+#ifdef _WIN32
+    closesocket(sock);
+#else
+    close(sock);
+#endif
+}
+
+void sock_set_blocking(sockhandle_t sock, bool block)
+{
+#ifdef _WIN32
+    u_long blocking = block ? 0 : 1;
+    ioctlsocket(sock, FIONBIO, &blocking);
+#else
+    int status = fcntl(sock, F_GETFL);
+    if (block)
+        status &= ~O_NONBLOCK;
+    else
+        status |= O_NONBLOCK;
+
+    fcntl(sock, F_SETFL, status);
+#endif
+}
+
+sockstatus_t sock_error_status()
+{
+#ifdef _WIN32
+    switch(WSAGetLastError())
+    {
+        case WSAEWOULDBLOCK:
+        case WSAEALREADY:
+            return SS_NotReady;
+        case WSAECONNABORTED:
+        case WSAECONNRESET:
+        case WSATIMEDOUT:
+        case WSAENETRESET:
+        case WSAENOTCONN:
+            return SS_Disconnected;
+        case WSAEISCONN:
+            return SS_Done;
+        default:
+            return SS_Error;
+    }
+#else
+    if (errno == EAGAIN || errno == EINPROGRESS)
+        return SS_NotReady;
+
+    switch(errno)
+    {
+        case EWOULDBLOCK: return SS_NotReady;
+        case ECONNABORTED:
+        case ECONNRESET:
+        case ETIMEDOUT:
+        case ENETRESET:
+        case ENOTCONN:
+        case EPIPE:
+            return SS_Disconnected;
+        default:
+            return SS_Error;
+    }
+#endif
+}
+
+sockhandle_t sock_invalid_socket()
+{
+#if _WIN32
+    return INVALID_SOCKET;
+#else
+    return -1;
+#endif
+}