summaryrefslogtreecommitdiff
path: root/src/dev/tcp_iface.cc
diff options
context:
space:
mode:
Diffstat (limited to 'src/dev/tcp_iface.cc')
-rw-r--r--src/dev/tcp_iface.cc158
1 files changed, 158 insertions, 0 deletions
diff --git a/src/dev/tcp_iface.cc b/src/dev/tcp_iface.cc
new file mode 100644
index 000000000..f18486fa3
--- /dev/null
+++ b/src/dev/tcp_iface.cc
@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) 2015 ARM Limited
+ * All rights reserved
+ *
+ * The license below extends only to copyright in the software and shall
+ * not be construed as granting a license to any other intellectual
+ * property including but not limited to intellectual property relating
+ * to a hardware implementation of the functionality of the software
+ * licensed hereunder. You may use the software subject to the license
+ * terms below provided that you ensure that this notice is replicated
+ * unmodified and in its entirety in all distributions of the software,
+ * modified or unmodified, in source code or in binary form.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabor Dozsa
+ */
+
+/* @file
+ * TCP stream socket based interface class implementation for multi gem5 runs.
+ */
+
+#include "dev/tcp_iface.hh"
+
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <cerrno>
+#include <cstring>
+
+#include "base/types.hh"
+#include "debug/MultiEthernet.hh"
+
+// MSG_NOSIGNAL does not exists on OS X
+#if defined(__APPLE__) || defined(__MACH__)
+#ifndef MSG_NOSIGNAL
+#define MSG_NOSIGNAL SO_NOSIGPIPE
+#endif
+#endif
+
+using namespace std;
+
+vector<int> TCPIface::sockRegistry;
+
+TCPIface::TCPIface(string server_name, unsigned server_port,
+ unsigned multi_rank, Tick sync_start, Tick sync_repeat,
+ EventManager *em) :
+ MultiIface(multi_rank, sync_start, sync_repeat, em)
+{
+ struct addrinfo addr_hint, *addr_results;
+ int ret;
+
+ string port_str = to_string(server_port);
+
+ sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
+ panic_if(sock < 0, "socket() failed: %s", strerror(errno));
+
+ bzero(&addr_hint, sizeof(addr_hint));
+ addr_hint.ai_family = AF_INET;
+ addr_hint.ai_socktype = SOCK_STREAM;
+ addr_hint.ai_protocol = IPPROTO_TCP;
+
+ ret = getaddrinfo(server_name.c_str(), port_str.c_str(),
+ &addr_hint, &addr_results);
+ panic_if(ret < 0, "getaddrinf() failed: %s", strerror(errno));
+
+ DPRINTF(MultiEthernet, "Connecting to %s:%u\n",
+ server_name.c_str(), port_str.c_str());
+
+ ret = ::connect(sock, (struct sockaddr *)(addr_results->ai_addr),
+ addr_results->ai_addrlen);
+ panic_if(ret < 0, "connect() failed: %s", strerror(errno));
+
+ freeaddrinfo(addr_results);
+ // add our socket to the static registry
+ sockRegistry.push_back(sock);
+ // let the server know who we are
+ sendTCP(sock, &multi_rank, sizeof(multi_rank));
+}
+
+TCPIface::~TCPIface()
+{
+ int M5_VAR_USED ret;
+
+ ret = close(sock);
+ assert(ret == 0);
+}
+
+void
+TCPIface::sendTCP(int sock, void *buf, unsigned length)
+{
+ ssize_t ret;
+
+ ret = ::send(sock, buf, length, MSG_NOSIGNAL);
+ panic_if(ret < 0, "send() failed: %s", strerror(errno));
+ panic_if(ret != length, "send() failed");
+}
+
+bool
+TCPIface::recvTCP(int sock, void *buf, unsigned length)
+{
+ ssize_t ret;
+
+ ret = ::recv(sock, buf, length, MSG_WAITALL );
+ if (ret < 0) {
+ if (errno == ECONNRESET || errno == EPIPE)
+ inform("recv(): %s", strerror(errno));
+ else if (ret < 0)
+ panic("recv() failed: %s", strerror(errno));
+ } else if (ret == 0) {
+ inform("recv(): Connection closed");
+ } else if (ret != length)
+ panic("recv() failed");
+
+ return (ret == length);
+}
+
+void
+TCPIface::syncRaw(MultiHeaderPkt::MsgType sync_req, Tick sync_tick)
+{
+ /*
+ * Barrier is simply implemented by point-to-point messages to the server
+ * for now. This method is called by only one TCPIface object.
+ * The server will send back an 'ack' message when it gets the
+ * sync request from all clients.
+ */
+ MultiHeaderPkt::Header header_pkt;
+ header_pkt.msgType = sync_req;
+ header_pkt.sendTick = sync_tick;
+
+ for (auto s : sockRegistry)
+ sendTCP(s, (void *)&header_pkt, sizeof(header_pkt));
+}
+