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Nayana BidariandgVisor bot
54bb03d239
This CL adds a test which verifies that the listening connections are restored correctly after checkpoint. The test checkpoints when the tcp server is in the listen state and verifies the read/write operations after the tcp server is restored. PiperOrigin-RevId: 684505213
88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
// Copyright 2024 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <errno.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <unistd.h>
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#define port 9000
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int main(int argc, char** argv) {
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int fd;
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if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
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perror("socket failed");
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exit(EXIT_FAILURE);
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}
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struct sockaddr_in addr;
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addr.sin_family = AF_INET;
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addr.sin_port = htons(port);
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addr.sin_addr.s_addr = INADDR_ANY;
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if (bind(fd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
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perror("bind failed");
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exit(EXIT_FAILURE);
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}
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if (listen(fd, 1) < 0) {
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perror("listen failed");
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exit(EXIT_FAILURE);
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}
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int addrlen = sizeof(addr);
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int conn;
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conn = accept(fd, (struct sockaddr*)&addr, (socklen_t*)&addrlen);
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if (conn < 0) {
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perror("accept failed");
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exit(EXIT_FAILURE);
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}
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close(conn);
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while (1) {
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conn = accept(fd, (struct sockaddr*)&addr, (socklen_t*)&addrlen);
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if (conn >= 0) {
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break;
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}
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if (errno != EINTR) {
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perror("accept failed");
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exit(EXIT_FAILURE);
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}
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}
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if (conn < 0) {
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perror("accept failed");
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exit(EXIT_FAILURE);
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}
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int n = 0;
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char send_buf[24] = "Hello!";
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n = write(conn, send_buf, strlen(send_buf));
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if (n < 0) {
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perror("ERROR writing to socket");
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exit(1);
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}
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char buffer[256];
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bzero(buffer, sizeof(buffer));
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n = read(conn, buffer, sizeof(buffer));
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if (n < 0) {
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perror("ERROR reading from socket");
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return n;
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}
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return 0;
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}
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