Initial import of Widevine Common Encryption DRM engine

Builds libwvmdrmengine.so, which is loaded by the new
MediaDrm APIs to support playback of Widevine/CENC
protected content.

Change-Id: I6f57dd37083dfd96c402cb9dd137c7d74edc8f1c

libwvdrmengine/cdm/core/test/http_socket.cpp

@@ -0,0 +1,192 @@
+// Copyright 2013 Google Inc. All Rights Reserved.
+
+#include "http_socket.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <netdb.h>
+#include <string.h>
+#include <sys/socket.h>
+
+#include "log.h"
+namespace wvcdm {
+
+HttpSocket::HttpSocket() : socket_fd_(-1), timeout_enabled_(false) {}
+
+HttpSocket::~HttpSocket()
+{
+    CloseSocket();
+}
+
+void HttpSocket::CloseSocket()
+{
+  if (socket_fd_ != -1) {
+      close(socket_fd_);
+      socket_fd_ = -1;
+  }
+}
+
+// Extracts the domain name and resource path from the input url parameter.
+// The results are put in domain_name and resource_path respectively.
+// The format of the url can begin with <protocol/scheme>:://domain server/...
+// or dowmain server/resource_path
+void HttpSocket::GetDomainNameAndPathFromUrl(const std::string& url,
+                                             std::string& domain_name,
+                                             std::string& resource_path) {
+  domain_name.clear();
+  resource_path.clear();
+
+  size_t start = url.find("//");
+  size_t end = url.npos;
+  if (start != url.npos) {
+    end = url.find("/", start + 2);
+    if (end != url.npos) {
+      domain_name.assign(url, start + 2, end - start - 2);
+      resource_path.assign(url, end + 1, url.npos);
+    } else {
+      domain_name.assign(url, start + 2, url.npos);
+    }
+  } else {
+    // no scheme/protocol in url
+    end = url.find("/");
+    if (end != url.npos) {
+      domain_name.assign(url, 0, end);
+      resource_path.assign(url, end + 1, url.npos);
+    } else {
+      domain_name.assign(url);
+    }
+  }
+  // strips port number if present, e.g. https://www.domain.com:8888/...
+  end = domain_name.find(":");
+  if (end != domain_name.npos) {
+    domain_name.erase(end);
+  }
+}
+
+bool HttpSocket::Connect(const char* url, const std::string& port, bool enable_timeout)
+{
+  GetDomainNameAndPathFromUrl(url, domain_name_, resource_path_);
+
+  socket_fd_ = socket(AF_INET, SOCK_STREAM, 0);
+  if (socket_fd_ < 0) {
+    LOGE("cannot open socket %d", errno);
+    return false;
+  }
+
+  int reuse = 1;
+  if (setsockopt(socket_fd_, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) == -1) {
+    CloseSocket();
+    LOGE("setsockopt error %d", errno);
+    return false;
+  }
+
+  struct addrinfo hints;
+  memset(&hints, 0, sizeof(hints));
+  hints.ai_family   = AF_INET;
+  hints.ai_socktype = SOCK_STREAM;
+  struct addrinfo* addr_info = NULL;
+  bool status = true;
+  int ret = getaddrinfo(domain_name_.c_str(), port.c_str(), &hints, &addr_info);
+  if (ret != 0) {
+    CloseSocket();
+    LOGE("getaddrinfo failed with %d", ret);
+    status = false;
+  } else {
+    if (connect(socket_fd_, addr_info->ai_addr, addr_info->ai_addrlen) == -1) {
+      CloseSocket();
+      LOGE("cannot connect socket to %s, error=%d", domain_name_.c_str(), errno);
+      status = false;
+    }
+  }
+  timeout_enabled_ = enable_timeout;
+  if (addr_info != NULL) {
+    freeaddrinfo(addr_info);
+  }
+  return status;
+}
+
+int HttpSocket::Read(char* data, int len) {
+  return(Read(data, len, 0));
+}
+
+// makes non-blocking mode only during read, it supports timeout for read
+// returns -1 for error, number of bytes read for success
+int HttpSocket::Read(char* data, int len, int timeout_in_ms)
+{
+  bool use_timeout = (timeout_enabled_ && (timeout_in_ms > 0));
+  int original_flags = 0;
+  if (use_timeout) {
+    original_flags = fcntl(socket_fd_, F_GETFL, 0);
+    if (original_flags == -1) {
+      LOGE("fcntl error %d", errno);
+      return -1;
+    }
+    if (fcntl(socket_fd_, F_SETFL, original_flags | O_NONBLOCK) == -1) {
+      LOGE("fcntl error %d", errno);
+      return -1;
+    }
+  }
+
+  int total_read = 0;
+  int read = 0;
+  int to_read = len;
+  while (to_read > 0) {
+    if (use_timeout) {
+      fd_set read_fds;
+      struct timeval tv;
+      tv.tv_sec = timeout_in_ms / 1000;
+      tv.tv_usec =  (timeout_in_ms % 1000) * 1000;
+      FD_ZERO(&read_fds);
+      FD_SET(socket_fd_, &read_fds);
+      if (select(socket_fd_ + 1, &read_fds, NULL, NULL, &tv) == -1) {
+        LOGE("select failed");
+        break;
+      }
+      if (!FD_ISSET(socket_fd_, &read_fds)) {
+        LOGE("socket read timeout");
+        break;
+      }
+    }
+
+    read = recv(socket_fd_, data, to_read, 0);
+    if (read > 0) {
+      to_read -= read;
+      data += read;
+      total_read += read;
+    } else if (read == 0) {
+      // in blocking mode, zero read mean's peer closed.
+      // in non-blocking mode, select said that there is data. so it should not happen
+      break;
+    } else {
+      LOGE("recv returned %d, error = %d", read, errno);
+      break;
+    }
+  }
+
+  if (use_timeout) {
+    fcntl(socket_fd_, F_SETFL, original_flags); // now blocking again
+  }
+  return total_read;
+}
+
+int HttpSocket::Write(const char* data, int len)
+{
+  int total_sent = 0;
+  int sent = 0;
+  int to_send = len;
+  while (to_send > 0) {
+    sent = send(socket_fd_, data, to_send, 0);
+    if (sent > 0) {
+      to_send -= sent;
+      data += sent;
+      total_sent += sent;
+    } else if (sent == 0) {
+      usleep(10); // retry later
+    } else {
+      LOGE("send returned error %d", errno);
+    }
+  }
+  return total_sent;
+}
+
+} // namespace wvcdm