add test for simple socket syscalls

test/Makefile

@@ -4,7 +4,7 @@ PROJECT_DIR := $(realpath $(CUR_DIR)/../)
 # Dependencies: need to be compiled but not to run by any Makefile target
 TEST_DEPS := dev_null
 # Tests: need to be compiled and run by test-% target
-TESTS := empty argv hello_world malloc file getpid spawn pipe time truncate readdir mkdir link tls pthread
+TESTS := empty argv hello_world malloc file getpid spawn pipe time truncate readdir mkdir link tls pthread clone server
 # Benchmarks: need to be compiled and run by bench-% target
 BENCHES := spawn_and_exit_latency pipe_throughput
 

test/client/Makefile

@@ -0,0 +1,5 @@
+include ../test_common.mk
+
+EXTRA_C_FLAGS :=
+EXTRA_LINK_FLAGS :=
+BIN_ARGS :=

test/client/main.c

@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <spawn.h>
+
+int main(int argc, const char *argv[]) {
+	const int BUF_SIZE = 0x1000;
+	const char* message = "Hello world!";
+	int ret;
+
+	if (argc != 2) {
+		printf("usage: ./client <ipaddress>\n");
+		return -1;
+	}
+
+	int sockfd = socket(AF_INET, SOCK_STREAM, 0);
+	if (sockfd < 0) {
+		printf("create socket error: %s(errno: %d)\n", strerror(errno), errno);
+		return -1;
+	}
+
+	struct sockaddr_in servaddr;
+	memset(&servaddr, 0, sizeof(servaddr));
+	servaddr.sin_family = AF_INET;
+	servaddr.sin_port = htons(6666);
+
+	ret = inet_pton(AF_INET, argv[1], &servaddr.sin_addr);
+	if (ret <= 0) {
+		printf("inet_pton error for %s\n", argv[1]);
+		return -1;
+	}
+
+	ret = connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr));
+	if (ret < 0) {
+		printf("connect error: %s(errno: %d)\n", strerror(errno), errno);
+		return -1;
+	}
+
+	printf("send msg to server: %s\n", message);
+	ret = send(sockfd, message, strlen(message), 0);
+	if (ret < 0) {
+		printf("send msg error: %s(errno: %d)\n", strerror(errno), errno);
+		return -1;
+	}
+
+	close(sockfd);
+	return 0;
+}

test/server/Makefile

@@ -0,0 +1,5 @@
+include ../test_common.mk
+
+EXTRA_C_FLAGS :=
+EXTRA_LINK_FLAGS :=
+BIN_ARGS :=

test/server/main.c

@@ -0,0 +1,59 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <spawn.h>
+
+int main(int argc, const char *argv[]) {
+	const int BUF_SIZE = 0x1000;
+	int ret;
+
+	int listenfd = socket(AF_INET, SOCK_STREAM, 0);
+	if (listenfd < 0) {
+		printf("create socket error: %s(errno: %d)\n", strerror(errno), errno);
+		return -1;
+	}
+
+	struct sockaddr_in servaddr;
+	memset(&servaddr, 0, sizeof(servaddr));
+	servaddr.sin_family = AF_INET;
+	servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
+	servaddr.sin_port = htons(6666);
+
+	ret = bind(listenfd, (struct sockaddr *) &servaddr, sizeof(servaddr));
+	if (ret < 0) {
+		printf("bind socket error: %s(errno: %d)\n", strerror(errno), errno);
+		return -1;
+	}
+
+	ret = listen(listenfd, 10);
+	if (ret < 0) {
+		printf("listen socket error: %s(errno: %d)\n", strerror(errno), errno);
+		return -1;
+	}
+
+	int client_pid;
+	char* client_argv[] = {"client", "127.0.0.1"};
+	ret = posix_spawn(&client_pid, "client", NULL, NULL, client_argv, NULL);
+	if (ret < 0) {
+		printf("spawn client process error: %s(errno: %d)\n", strerror(errno), errno);
+		return -1;
+	}
+
+	printf("====== waiting for client's request ======\n");
+	int connect_fd = accept(listenfd, (struct sockaddr *) NULL, NULL);
+	if (connect_fd < 0) {
+		printf("accept socket error: %s(errno: %d)", strerror(errno), errno);
+		return -1;
+	}
+	char buff[BUF_SIZE];
+	int n = recv(connect_fd, buff, BUF_SIZE, 0);
+	buff[n] = '\0';
+	printf("recv msg from client: %s\n", buff);
+	close(connect_fd);
+
+	close(listenfd);
+}