From 4fb18f31865f9766579d7221b040b1da9c98b561 Mon Sep 17 00:00:00 2001
From: "Nicolas \"Pixel\" Noble" <pixel@nobis-crew.org>
Date: Sat, 21 Dec 2013 23:49:52 -0800
Subject: WebSockets can now send frames.

---
 src/BWebSocket.cc | 96 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)

(limited to 'src/BWebSocket.cc')

diff --git a/src/BWebSocket.cc b/src/BWebSocket.cc
index 370b702..3e81e7d 100644
--- a/src/BWebSocket.cc
+++ b/src/BWebSocket.cc
@@ -5,11 +5,107 @@
 
 #define rotate(value) (((value) << 8) | ((value) >> 24))
 
+Balau::WebSocketFrame::WebSocketFrame(const uint8_t * data, size_t len, uint8_t opcode, bool doMask) {
+    m_len = len;
+    m_headerSize = 2;
+    if (m_len >= 126)   m_headerSize += 2;
+    if (m_len >= 65536) m_headerSize += 6;
+    if (doMask)         m_headerSize += 4;
+    m_data = (uint8_t *)malloc(m_len + m_headerSize);
+    uint8_t * maskPtr;
+
+    m_data[0] = 0x80 | opcode;
+    m_data[1] = doMask ? 0x80 : 0x00;
+    if (m_len < 125) {
+        m_data[1] |= m_len;
+        maskPtr = m_data + 2;
+    } else if (m_len < 65536) {
+        m_data[1] |= 126;
+        m_data[2] = m_len >> 8;
+        m_data[3] = m_len & 0xff;
+        maskPtr = m_data + 4;
+    } else {
+        m_data[1] |= 127;
+        uint8_t * lenPtr = maskPtr = m_data + 10;
+        size_t len = m_len;
+        *(--lenPtr) = len & 0xff; len >>= 8;
+        *(--lenPtr) = len & 0xff; len >>= 8;
+        *(--lenPtr) = len & 0xff; len >>= 8;
+        *(--lenPtr) = len & 0xff; len >>= 8;
+        *(--lenPtr) = len & 0xff; len >>= 8;
+        *(--lenPtr) = len & 0xff; len >>= 8;
+        *(--lenPtr) = len & 0xff; len >>= 8;
+        *(--lenPtr) = len & 0xff; len >>= 8;
+    }
+
+    if (doMask) {
+        uint32_t mask = m_mask;
+        for (int i = 0; i < 4; i++) {
+            *(maskPtr++) = mask >> 24;
+            mask <<= 8;
+        }
+    } else {
+        m_mask = 0;
+    }
+
+    if (data) memcpy(maskPtr, data, m_len);
+}
+
+uint8_t & Balau::WebSocketFrame::operator[](size_t idx) {
+    static uint8_t dummy = 0;
+    if (idx >= m_len) return dummy;
+    return m_data[idx + m_headerSize];
+}
+
+void Balau::WebSocketFrame::send(Balau::IO<Balau::Handle> socket) {
+    size_t totalLen = m_headerSize + m_len;
+
+    if (m_mask) {
+        for (int i = m_headerSize; i < totalLen; i++) {
+            m_data[i] ^= m_mask >> 24;
+            m_mask = rotate(m_mask);
+        }
+        m_mask = 0;
+    }
+
+    while (m_bytesSent < totalLen) {
+        ssize_t r = socket->write(m_data + m_bytesSent, totalLen - m_bytesSent);
+        if (r < 0)
+            m_bytesSent = totalLen;
+        else
+            m_bytesSent += r;
+    }
+}
+
+Balau::WebSocketWorker::~WebSocketWorker() {
+    free(m_payload);
+    delete m_sending;
+    while (!m_sendQueue.isEmpty())
+        delete m_sendQueue.pop();
+}
+
 void Balau::WebSocketWorker::Do() {
     uint8_t c;
 
+    waitFor(m_sendQueue.getEvent());
+    m_sendQueue.getEvent()->resetMaybe();
+
     try {
         while (!m_socket->isClosed()) {
+            for (;;) {
+                if (m_sending)
+                    m_sending->send(m_socket);
+
+                if (!m_sendQueue.isEmpty())
+                    m_sending = m_sendQueue.pop();
+                else
+                    break;
+                if (m_socket->isClosed()) return;
+            }
+
+            delete m_sending;
+            m_sending = NULL;
+
             switch (m_state) {
             case READ_H:
                 m_socket->read(&c, 1);
-- 
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