LibCore: Move GIODevice hierarchy from LibGUI to LibCore.

LibCore/CSocket.cpp

@@ -0,0 +1,93 @@
+#include <LibCore/CSocket.h>
+#include <LibCore/CNotifier.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <netdb.h>
+#include <errno.h>
+
+CSocket::CSocket(Type type, CObject* parent)
+    : CIODevice(parent)
+    , m_type(type)
+{
+}
+
+CSocket::~CSocket()
+{
+}
+
+bool CSocket::connect(const String& hostname, int port)
+{
+    auto* hostent = gethostbyname(hostname.characters());
+    if (!hostent) {
+        dbgprintf("CSocket::connect: Unable to resolve '%s'\n", hostname.characters());
+        return false;
+    }
+
+    IPv4Address host_address((const byte*)hostent->h_addr_list[0]);
+    dbgprintf("CSocket::connect: Resolved '%s' to %s\n", hostname.characters(), host_address.to_string().characters());
+    return connect(host_address, port);
+}
+
+bool CSocket::connect(const CSocketAddress& address, int port)
+{
+    ASSERT(!is_connected());
+    ASSERT(address.type() == CSocketAddress::Type::IPv4);
+    ASSERT(port > 0 && port <= 65535);
+
+    struct sockaddr_in addr;
+    memset(&addr, 0, sizeof(addr));
+    auto ipv4_address = address.ipv4_address();
+    memcpy(&addr.sin_addr.s_addr, &ipv4_address, sizeof(IPv4Address));
+    addr.sin_family = AF_INET;
+    addr.sin_port = htons(port);
+
+    m_destination_address = address;
+    m_destination_port = port;
+
+    printf("Connecting to %s...", address.to_string().characters());
+    fflush(stdout);
+    int rc = ::connect(fd(), (struct sockaddr*)&addr, sizeof(addr));
+    if (rc < 0) {
+        if (errno == EINPROGRESS) {
+            printf("in progress.\n");
+            m_notifier = make<CNotifier>(fd(), CNotifier::Event::Write);
+            m_notifier->on_ready_to_write = [this] {
+                printf("%s{%p} connected!\n", class_name(), this);
+                m_connected = true;
+                m_notifier->set_event_mask(CNotifier::Event::None);
+                if (on_connected)
+                    on_connected();
+            };
+            return true;
+        }
+        perror("connect");
+        exit(1);
+    }
+    printf("ok!\n");
+    m_connected = true;
+    return true;
+}
+
+ByteBuffer CSocket::receive(int max_size)
+{
+    auto buffer = read(max_size);
+    if (eof()) {
+        dbgprintf("CSocket{%p}: Connection appears to have closed in receive().\n", this);
+        m_connected = false;
+    }
+    return buffer;
+}
+
+bool CSocket::send(const ByteBuffer& data)
+{
+    int nsent = ::send(fd(), data.pointer(), data.size(), 0);
+    if (nsent < 0) {
+        set_error(nsent);
+        return false;
+    }
+    ASSERT(nsent == data.size());
+    return true;
+}