1/*
2 * Copyright (c) 2015 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Gabor Dozsa
38 * Mohammad Alian
39 */
40
41/* @file
42 * TCP stream socket based interface class implementation for dist-gem5 runs.
43 */
44
45#include "dev/net/tcp_iface.hh"
46
47#include <arpa/inet.h>
48#include <netdb.h>
49#include <netinet/tcp.h>
50#include <sys/socket.h>
51#include <sys/types.h>
52#include <unistd.h>
53
54#include <cerrno>
55#include <cstring>
56#include <vector>
57
58#include "base/types.hh"
59#include "debug/DistEthernet.hh"
60#include "debug/DistEthernetCmd.hh"
61#include "sim/sim_exit.hh"
62
63#if defined(__FreeBSD__)
64#include <netinet/in.h>
65
66#endif
67
68// MSG_NOSIGNAL does not exists on OS X
69#if defined(__APPLE__) || defined(__MACH__)
70#ifndef MSG_NOSIGNAL
71#define MSG_NOSIGNAL SO_NOSIGPIPE
72#endif
73#endif
74
75using namespace std;
76
77std::vector<std::pair<TCPIface::NodeInfo, int> > TCPIface::nodes;
78vector<int> TCPIface::sockRegistry;
79int TCPIface::fdStatic = -1;
80bool TCPIface::anyListening = false;
81
82TCPIface::TCPIface(string server_name, unsigned server_port,
83 unsigned dist_rank, unsigned dist_size,
84 Tick sync_start, Tick sync_repeat,
85 EventManager *em, bool is_switch, int num_nodes) :
86 DistIface(dist_rank, dist_size, sync_start, sync_repeat, em,
87 is_switch, num_nodes), serverName(server_name),
88 serverPort(server_port), isSwitch(is_switch), listening(false)
89{
90 if (is_switch && isMaster) {
91 while (!listen(serverPort)) {
92 DPRINTF(DistEthernet, "TCPIface(listen): Can't bind port %d\n",
93 serverPort);
94 serverPort++;
95 }
96 inform("tcp_iface listening on port %d", serverPort);
97 // Now accept the first connection requests from each compute node and
98 // store the node info. The compute nodes will then wait for ack
99 // messages. Ack messages will be sent by initTransport() in the
100 // appropriate order to make sure that every compute node is always
101 // connected to the same switch port.
102 NodeInfo ni;
103 for (int i = 0; i < size; i++) {
104 accept();
105 DPRINTF(DistEthernet, "First connection, waiting for link info\n");
106 if (!recvTCP(sock, &ni, sizeof(ni)))
107 panic("Failed to receive link info");
108 nodes.push_back(make_pair(ni, sock));
109 }
110 }
111}
112
113bool
114TCPIface::listen(int port)
115{
116 if (listening)
117 panic("Socket already listening!");
118
119 struct sockaddr_in sockaddr;
120 int ret;
121
122 fdStatic = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
123 panic_if(fdStatic < 0, "socket() failed: %s", strerror(errno));
124
125 sockaddr.sin_family = PF_INET;
126 sockaddr.sin_addr.s_addr = INADDR_ANY;
127 sockaddr.sin_port = htons(port);
128 // finally clear sin_zero
129 memset(&sockaddr.sin_zero, 0, sizeof(sockaddr.sin_zero));
130 ret = ::bind(fdStatic, (struct sockaddr *)&sockaddr, sizeof (sockaddr));
131
132 if (ret != 0) {
133 if (ret == -1 && errno != EADDRINUSE)
134 panic("ListenSocket(listen): bind() failed!");
135 return false;
136 }
137
138 if (::listen(fdStatic, 24) == -1) {
139 if (errno != EADDRINUSE)
140 panic("ListenSocket(listen): listen() failed!");
141
142 return false;
143 }
144
145 listening = true;
146 anyListening = true;
147 return true;
148}
149
150void
151TCPIface::establishConnection()
152{
153 static unsigned cur_rank = 0;
154 static unsigned cur_id = 0;
155 NodeInfo ni;
156
157 if (isSwitch) {
158 if (cur_id == 0) { // first connection accepted in the ctor already
159 auto const &iface0 =
160 find_if(nodes.begin(), nodes.end(),
161 [](const pair<NodeInfo, int> &cn) -> bool {
162 return cn.first.rank == cur_rank;
163 });
164 assert(iface0 != nodes.end());
165 assert(iface0->first.distIfaceId == 0);
166 sock = iface0->second;
167 ni = iface0->first;
168 } else { // additional connections from the same compute node
169 accept();
170 DPRINTF(DistEthernet, "Next connection, waiting for link info\n");
171 if (!recvTCP(sock, &ni, sizeof(ni)))
172 panic("Failed to receive link info");
173 assert(ni.rank == cur_rank);
174 assert(ni.distIfaceId == cur_id);
175 }
176 inform("Link okay (iface:%d -> (node:%d, iface:%d))",
177 distIfaceId, ni.rank, ni.distIfaceId);
178 if (ni.distIfaceId < ni.distIfaceNum - 1) {
179 cur_id++;
180 } else {
181 cur_rank++;
182 cur_id = 0;
183 }
184 // send ack
185 ni.distIfaceId = distIfaceId;
186 ni.distIfaceNum = distIfaceNum;
187 sendTCP(sock, &ni, sizeof(ni));
188 } else { // this is not a switch
189 connect();
190 // send link info
191 ni.rank = rank;
192 ni.distIfaceId = distIfaceId;
193 ni.distIfaceNum = distIfaceNum;
194 sendTCP(sock, &ni, sizeof(ni));
195 DPRINTF(DistEthernet, "Connected, waiting for ack (distIfaceId:%d\n",
196 distIfaceId);
197 if (!recvTCP(sock, &ni, sizeof(ni)))
198 panic("Failed to receive ack");
199 assert(ni.rank == rank);
200 inform("Link okay (iface:%d -> switch iface:%d)", distIfaceId,
201 ni.distIfaceId);
202 }
203 sockRegistry.push_back(sock);
204}
205
206void
207TCPIface::accept()
208{
209 struct sockaddr_in sockaddr;
210 socklen_t slen = sizeof (sockaddr);
211 sock = ::accept(fdStatic, (struct sockaddr *)&sockaddr, &slen);
212 if (sock != -1) {
213 int i = 1;
214 if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (char *)&i,
215 sizeof(i)) < 0)
216 warn("ListenSocket(accept): setsockopt() TCP_NODELAY failed!");
217 }
218}
219
220void
221TCPIface::connect()
222{
223 struct addrinfo addr_hint, *addr_results;
224 int ret;
225
226 string port_str = to_string(serverPort);
227
228 sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
229 panic_if(sock < 0, "socket() failed: %s", strerror(errno));
230
231 int fl = 1;
232 if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (char *)&fl, sizeof(fl)) < 0)
233 warn("ConnectSocket(connect): setsockopt() TCP_NODELAY failed!");
234
235 bzero(&addr_hint, sizeof(addr_hint));
236 addr_hint.ai_family = AF_INET;
237 addr_hint.ai_socktype = SOCK_STREAM;
238 addr_hint.ai_protocol = IPPROTO_TCP;
239
240 ret = getaddrinfo(serverName.c_str(), port_str.c_str(),
241 &addr_hint, &addr_results);
242 panic_if(ret < 0, "getaddrinf() failed: %s", strerror(errno));
243
244 DPRINTF(DistEthernet, "Connecting to %s:%s\n",
245 serverName.c_str(), port_str.c_str());
246
247 ret = ::connect(sock, (struct sockaddr *)(addr_results->ai_addr),
248 addr_results->ai_addrlen);
249 panic_if(ret < 0, "connect() failed: %s", strerror(errno));
250
251 freeaddrinfo(addr_results);
252}
253
254TCPIface::~TCPIface()
255{
256 int M5_VAR_USED ret;
257
258 ret = close(sock);
259 assert(ret == 0);
260}
261
262void
263TCPIface::sendTCP(int sock, const void *buf, unsigned length)
264{
265 ssize_t ret;
266
267 ret = ::send(sock, buf, length, MSG_NOSIGNAL);
268 if (ret < 0) {
269 if (errno == ECONNRESET || errno == EPIPE) {
270 exitSimLoop("Message server closed connection, simulation "
271 "is exiting");
272 } else {
273 panic("send() failed: %s", strerror(errno));
274 }
275 }
276 panic_if(ret != length, "send() failed");
277}
278
279bool
280TCPIface::recvTCP(int sock, void *buf, unsigned length)
281{
282 ssize_t ret;
283
284 ret = ::recv(sock, buf, length, MSG_WAITALL );
285 if (ret < 0) {
286 if (errno == ECONNRESET || errno == EPIPE)
287 inform("recv(): %s", strerror(errno));
288 else if (ret < 0)
289 panic("recv() failed: %s", strerror(errno));
290 } else if (ret == 0) {
291 inform("recv(): Connection closed");
292 } else if (ret != length)
293 panic("recv() failed");
294
295 return (ret == length);
296}
297
298void
299TCPIface::sendPacket(const Header &header, const EthPacketPtr &packet)
300{
301 sendTCP(sock, &header, sizeof(header));
302 sendTCP(sock, packet->data, packet->length);
303}
304
305void
306TCPIface::sendCmd(const Header &header)
307{
308 DPRINTF(DistEthernetCmd, "TCPIface::sendCmd() type: %d\n",
309 static_cast<int>(header.msgType));
310 // Global commands (i.e. sync request) are always sent by the master
311 // DistIface. The transfer method is simply implemented as point-to-point
312 // messages for now
313 for (auto s: sockRegistry)
314 sendTCP(s, (void*)&header, sizeof(header));
315}
316
317bool
318TCPIface::recvHeader(Header &header)
319{
320 bool ret = recvTCP(sock, &header, sizeof(header));
321 DPRINTF(DistEthernetCmd, "TCPIface::recvHeader() type: %d ret: %d\n",
322 static_cast<int>(header.msgType), ret);
323 return ret;
324}
325
326void
327TCPIface::recvPacket(const Header &header, EthPacketPtr &packet)
328{
329 packet = make_shared<EthPacketData>(header.dataPacketLength);
330 bool ret = recvTCP(sock, packet->data, header.dataPacketLength);
331 panic_if(!ret, "Error while reading socket");
| 1/*
2 * Copyright (c) 2015 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Gabor Dozsa
38 * Mohammad Alian
39 */
40
41/* @file
42 * TCP stream socket based interface class implementation for dist-gem5 runs.
43 */
44
45#include "dev/net/tcp_iface.hh"
46
47#include <arpa/inet.h>
48#include <netdb.h>
49#include <netinet/tcp.h>
50#include <sys/socket.h>
51#include <sys/types.h>
52#include <unistd.h>
53
54#include <cerrno>
55#include <cstring>
56#include <vector>
57
58#include "base/types.hh"
59#include "debug/DistEthernet.hh"
60#include "debug/DistEthernetCmd.hh"
61#include "sim/sim_exit.hh"
62
63#if defined(__FreeBSD__)
64#include <netinet/in.h>
65
66#endif
67
68// MSG_NOSIGNAL does not exists on OS X
69#if defined(__APPLE__) || defined(__MACH__)
70#ifndef MSG_NOSIGNAL
71#define MSG_NOSIGNAL SO_NOSIGPIPE
72#endif
73#endif
74
75using namespace std;
76
77std::vector<std::pair<TCPIface::NodeInfo, int> > TCPIface::nodes;
78vector<int> TCPIface::sockRegistry;
79int TCPIface::fdStatic = -1;
80bool TCPIface::anyListening = false;
81
82TCPIface::TCPIface(string server_name, unsigned server_port,
83 unsigned dist_rank, unsigned dist_size,
84 Tick sync_start, Tick sync_repeat,
85 EventManager *em, bool is_switch, int num_nodes) :
86 DistIface(dist_rank, dist_size, sync_start, sync_repeat, em,
87 is_switch, num_nodes), serverName(server_name),
88 serverPort(server_port), isSwitch(is_switch), listening(false)
89{
90 if (is_switch && isMaster) {
91 while (!listen(serverPort)) {
92 DPRINTF(DistEthernet, "TCPIface(listen): Can't bind port %d\n",
93 serverPort);
94 serverPort++;
95 }
96 inform("tcp_iface listening on port %d", serverPort);
97 // Now accept the first connection requests from each compute node and
98 // store the node info. The compute nodes will then wait for ack
99 // messages. Ack messages will be sent by initTransport() in the
100 // appropriate order to make sure that every compute node is always
101 // connected to the same switch port.
102 NodeInfo ni;
103 for (int i = 0; i < size; i++) {
104 accept();
105 DPRINTF(DistEthernet, "First connection, waiting for link info\n");
106 if (!recvTCP(sock, &ni, sizeof(ni)))
107 panic("Failed to receive link info");
108 nodes.push_back(make_pair(ni, sock));
109 }
110 }
111}
112
113bool
114TCPIface::listen(int port)
115{
116 if (listening)
117 panic("Socket already listening!");
118
119 struct sockaddr_in sockaddr;
120 int ret;
121
122 fdStatic = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
123 panic_if(fdStatic < 0, "socket() failed: %s", strerror(errno));
124
125 sockaddr.sin_family = PF_INET;
126 sockaddr.sin_addr.s_addr = INADDR_ANY;
127 sockaddr.sin_port = htons(port);
128 // finally clear sin_zero
129 memset(&sockaddr.sin_zero, 0, sizeof(sockaddr.sin_zero));
130 ret = ::bind(fdStatic, (struct sockaddr *)&sockaddr, sizeof (sockaddr));
131
132 if (ret != 0) {
133 if (ret == -1 && errno != EADDRINUSE)
134 panic("ListenSocket(listen): bind() failed!");
135 return false;
136 }
137
138 if (::listen(fdStatic, 24) == -1) {
139 if (errno != EADDRINUSE)
140 panic("ListenSocket(listen): listen() failed!");
141
142 return false;
143 }
144
145 listening = true;
146 anyListening = true;
147 return true;
148}
149
150void
151TCPIface::establishConnection()
152{
153 static unsigned cur_rank = 0;
154 static unsigned cur_id = 0;
155 NodeInfo ni;
156
157 if (isSwitch) {
158 if (cur_id == 0) { // first connection accepted in the ctor already
159 auto const &iface0 =
160 find_if(nodes.begin(), nodes.end(),
161 [](const pair<NodeInfo, int> &cn) -> bool {
162 return cn.first.rank == cur_rank;
163 });
164 assert(iface0 != nodes.end());
165 assert(iface0->first.distIfaceId == 0);
166 sock = iface0->second;
167 ni = iface0->first;
168 } else { // additional connections from the same compute node
169 accept();
170 DPRINTF(DistEthernet, "Next connection, waiting for link info\n");
171 if (!recvTCP(sock, &ni, sizeof(ni)))
172 panic("Failed to receive link info");
173 assert(ni.rank == cur_rank);
174 assert(ni.distIfaceId == cur_id);
175 }
176 inform("Link okay (iface:%d -> (node:%d, iface:%d))",
177 distIfaceId, ni.rank, ni.distIfaceId);
178 if (ni.distIfaceId < ni.distIfaceNum - 1) {
179 cur_id++;
180 } else {
181 cur_rank++;
182 cur_id = 0;
183 }
184 // send ack
185 ni.distIfaceId = distIfaceId;
186 ni.distIfaceNum = distIfaceNum;
187 sendTCP(sock, &ni, sizeof(ni));
188 } else { // this is not a switch
189 connect();
190 // send link info
191 ni.rank = rank;
192 ni.distIfaceId = distIfaceId;
193 ni.distIfaceNum = distIfaceNum;
194 sendTCP(sock, &ni, sizeof(ni));
195 DPRINTF(DistEthernet, "Connected, waiting for ack (distIfaceId:%d\n",
196 distIfaceId);
197 if (!recvTCP(sock, &ni, sizeof(ni)))
198 panic("Failed to receive ack");
199 assert(ni.rank == rank);
200 inform("Link okay (iface:%d -> switch iface:%d)", distIfaceId,
201 ni.distIfaceId);
202 }
203 sockRegistry.push_back(sock);
204}
205
206void
207TCPIface::accept()
208{
209 struct sockaddr_in sockaddr;
210 socklen_t slen = sizeof (sockaddr);
211 sock = ::accept(fdStatic, (struct sockaddr *)&sockaddr, &slen);
212 if (sock != -1) {
213 int i = 1;
214 if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (char *)&i,
215 sizeof(i)) < 0)
216 warn("ListenSocket(accept): setsockopt() TCP_NODELAY failed!");
217 }
218}
219
220void
221TCPIface::connect()
222{
223 struct addrinfo addr_hint, *addr_results;
224 int ret;
225
226 string port_str = to_string(serverPort);
227
228 sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
229 panic_if(sock < 0, "socket() failed: %s", strerror(errno));
230
231 int fl = 1;
232 if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (char *)&fl, sizeof(fl)) < 0)
233 warn("ConnectSocket(connect): setsockopt() TCP_NODELAY failed!");
234
235 bzero(&addr_hint, sizeof(addr_hint));
236 addr_hint.ai_family = AF_INET;
237 addr_hint.ai_socktype = SOCK_STREAM;
238 addr_hint.ai_protocol = IPPROTO_TCP;
239
240 ret = getaddrinfo(serverName.c_str(), port_str.c_str(),
241 &addr_hint, &addr_results);
242 panic_if(ret < 0, "getaddrinf() failed: %s", strerror(errno));
243
244 DPRINTF(DistEthernet, "Connecting to %s:%s\n",
245 serverName.c_str(), port_str.c_str());
246
247 ret = ::connect(sock, (struct sockaddr *)(addr_results->ai_addr),
248 addr_results->ai_addrlen);
249 panic_if(ret < 0, "connect() failed: %s", strerror(errno));
250
251 freeaddrinfo(addr_results);
252}
253
254TCPIface::~TCPIface()
255{
256 int M5_VAR_USED ret;
257
258 ret = close(sock);
259 assert(ret == 0);
260}
261
262void
263TCPIface::sendTCP(int sock, const void *buf, unsigned length)
264{
265 ssize_t ret;
266
267 ret = ::send(sock, buf, length, MSG_NOSIGNAL);
268 if (ret < 0) {
269 if (errno == ECONNRESET || errno == EPIPE) {
270 exitSimLoop("Message server closed connection, simulation "
271 "is exiting");
272 } else {
273 panic("send() failed: %s", strerror(errno));
274 }
275 }
276 panic_if(ret != length, "send() failed");
277}
278
279bool
280TCPIface::recvTCP(int sock, void *buf, unsigned length)
281{
282 ssize_t ret;
283
284 ret = ::recv(sock, buf, length, MSG_WAITALL );
285 if (ret < 0) {
286 if (errno == ECONNRESET || errno == EPIPE)
287 inform("recv(): %s", strerror(errno));
288 else if (ret < 0)
289 panic("recv() failed: %s", strerror(errno));
290 } else if (ret == 0) {
291 inform("recv(): Connection closed");
292 } else if (ret != length)
293 panic("recv() failed");
294
295 return (ret == length);
296}
297
298void
299TCPIface::sendPacket(const Header &header, const EthPacketPtr &packet)
300{
301 sendTCP(sock, &header, sizeof(header));
302 sendTCP(sock, packet->data, packet->length);
303}
304
305void
306TCPIface::sendCmd(const Header &header)
307{
308 DPRINTF(DistEthernetCmd, "TCPIface::sendCmd() type: %d\n",
309 static_cast<int>(header.msgType));
310 // Global commands (i.e. sync request) are always sent by the master
311 // DistIface. The transfer method is simply implemented as point-to-point
312 // messages for now
313 for (auto s: sockRegistry)
314 sendTCP(s, (void*)&header, sizeof(header));
315}
316
317bool
318TCPIface::recvHeader(Header &header)
319{
320 bool ret = recvTCP(sock, &header, sizeof(header));
321 DPRINTF(DistEthernetCmd, "TCPIface::recvHeader() type: %d ret: %d\n",
322 static_cast<int>(header.msgType), ret);
323 return ret;
324}
325
326void
327TCPIface::recvPacket(const Header &header, EthPacketPtr &packet)
328{
329 packet = make_shared<EthPacketData>(header.dataPacketLength);
330 bool ret = recvTCP(sock, packet->data, header.dataPacketLength);
331 panic_if(!ret, "Error while reading socket");
|