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linuxstudy

socket

socket_test.cpp

socket_test.cpp 6.25 KB

/**-------------------------------------------------------
 * 测试在同一个sock fd上, 连续多次调用bind, listen.
 * 验证找一个可用端口号, 以及出错处是在socket, bind, or listen
 */

#include <unistd.h>
#include <errno.h>
#include <sys/types.h> /* See NOTES */
#include <sys/socket.h>
#include <stdio.h>
#include <arpa/inet.h>

using namespace std;

typedef sockaddr SA;

int socket_create(const char* ip, const int port)
{
	if (ip == NULL || port < 0) {
		return -1;
	}

/* create socket */
	int sock = socket(AF_INET, SOCK_STREAM, 0);
	if (sock < 0) {
		perror("socket error");
		return -1;
	}

/* set sock option SO_REUSEADDR for re-bind when calling socket failed */
	int op = 1;
	setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &op, sizeof(op));

struct sockaddr_in local;
	local.sin_family = AF_INET;
	local.sin_port = htons(static_cast<uint16_t>(port));
	local.sin_addr.s_addr = inet_addr(ip);

if (bind(sock, reinterpret_cast<SA*>(&local), sizeof(local)) < 0) {
		perror("bind error");
		return -1;
	}

if (listen(sock, 10) < 0) {
		perror("listen error");
		return -1;
	}

return sock;
}

int test_bindTwoTimes(const char* ip, const int port)
{
	if (ip == NULL || port < 0) {
		return -1;
	}

/* create socket */
	int sock = socket(AF_INET, SOCK_STREAM, 0);
	if (sock < 0) {
		perror("socket error");
		return -1;
	}

/* set sock option SO_REUSEADDR for re-bind when calling socket failed */
	int op = 1;
	setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &op, sizeof(op));

struct sockaddr_in local;
	local.sin_family = AF_INET;
	local.sin_port = htons(static_cast<uint16_t>(port));
	local.sin_addr.s_addr = inet_addr(ip);

if (bind(sock, reinterpret_cast<SA*>(&local), sizeof(local)) < 0) { /* first time */
		perror("bind1 error");
		return -1;
	}

if (bind(sock, reinterpret_cast<SA*>(&local), sizeof(local)) < 0) { /* second time */
		perror("bind2 error");
		return -1;
	}

if (listen(sock, 10) < 0) {
		perror("bind error");
		return -1;
	}

return sock;
}

int test_listenTwoTimes(const char* ip, const int port)
{
	if (ip == NULL || port < 0) {
		return -1;
	}

/* create socket */
	int sock = socket(AF_INET, SOCK_STREAM, 0);
	if (sock < 0) {
		perror("socket error");
		return -1;
	}

/* set sock option SO_REUSEADDR for re-bind when calling socket failed */
	int op = 1;
	setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &op, sizeof(op));

struct sockaddr_in local;
	local.sin_family = AF_INET;
	local.sin_port = htons(static_cast<uint16_t>(port));
	local.sin_addr.s_addr = inet_addr(ip);

if (bind(sock, reinterpret_cast<SA*>(&local), sizeof(local)) < 0) {
		perror("bind error");
		return -1;
	}

if (listen(sock, 10) < 0) {
		perror("listen1 error");
		return -1;
	}

if (listen(sock, 10) < 0) {
		perror("listen2 error");
		return -1;
	}

return sock;
}

int main()
{
	printf("Test on different socket fd\n");
	{
		printf("Test Case: background\n");
		const char* ip = "0.0.0.0";
		int port = 1025; /* 使用well-known端口号(0~1023)需要root权限*/
		int sockfd = socket_create(ip, port);
		if (sockfd >= 0) {
			printf("Success to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		else {
			printf("Fail to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}

close(sockfd);
	}

{
		printf("Test Case1: bind two times on same sockfd\n");
		const char* ip = "0.0.0.0";
		int port = 1025;
		int sockfd = test_bindTwoTimes(ip, port);
		if (sockfd >= 0) {
			printf("Success to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		else {
			printf("Fail to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		close(sockfd);
	}

{
		printf("Test Case2: bind two times on same sockfd\n");
		const char* ip = "0.0.0.0";
		int port = 65536;
		int sockfd = test_bindTwoTimes(ip, port);
		if (sockfd >= 0) {
			printf("Success to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		else {
			printf("Fail to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		close(sockfd);
	}

{
		printf("Test Case1: listen two times on same sockfd\n");
		const char* ip = "0.0.0.0";
		int port = 1025;
		int sockfd = test_listenTwoTimes(ip, port);
		if (sockfd >= 0) {
			printf("Success to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		else {
			printf("Fail to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		close(sockfd);
	}

{
		printf("Test Case2: listen two times on same sockfd\n");
		const char* ip = "0.0.0.0";
		int port = 65536;
		int sockfd = test_listenTwoTimes(ip, port);
		if (sockfd >= 0) {
			printf("Success to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		else {
			printf("Fail to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		close(sockfd);
	}

///////////////////
	printf("\nTest on same socket fd\n");
	{
		printf("Test Case: background\n");
		const char* ip = "0.0.0.0";
		int port = 1025; /* 使用well-known端口号(0~1023)需要root权限*/
		int sockfd = socket_create(ip, port);
		if (sockfd >= 0) {
			printf("Success to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		else {
			printf("Fail to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
	}

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fortunely 提交于 2022年06月12日 11:31 +08:00 . (Feat)添加socket模块:用于常用socket网络编程的学习、汇总;

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/**-------------------------------------------------------
 * 测试在同一个sock fd上, 连续多次调用bind, listen.
 * 验证找一个可用端口号, 以及出错处是在socket, bind, or listen
 */

#include <unistd.h>
#include <errno.h>
#include <sys/types.h> /* See NOTES */
#include <sys/socket.h>
#include <stdio.h>
#include <arpa/inet.h>

using namespace std;

typedef sockaddr SA;

int socket_create(const char* ip, const int port)
{
	if (ip == NULL || port < 0) {
		return -1;
	}

	/* create socket */
	int sock = socket(AF_INET, SOCK_STREAM, 0);
	if (sock < 0) {
		perror("socket error");
		return -1;
	}

	/* set sock option SO_REUSEADDR for re-bind when calling socket failed */
	int op = 1;
	setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &op, sizeof(op));

	struct sockaddr_in local;
	local.sin_family = AF_INET;
	local.sin_port = htons(static_cast<uint16_t>(port));
	local.sin_addr.s_addr = inet_addr(ip);

	if (bind(sock, reinterpret_cast<SA*>(&local), sizeof(local)) < 0) {
		perror("bind error");
		return -1;
	}

	if (listen(sock, 10) < 0) {
		perror("listen error");
		return -1;
	}

	return sock;
}

int test_bindTwoTimes(const char* ip, const int port)
{
	if (ip == NULL || port < 0) {
		return -1;
	}

	/* create socket */
	int sock = socket(AF_INET, SOCK_STREAM, 0);
	if (sock < 0) {
		perror("socket error");
		return -1;
	}

	/* set sock option SO_REUSEADDR for re-bind when calling socket failed */
	int op = 1;
	setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &op, sizeof(op));

	struct sockaddr_in local;
	local.sin_family = AF_INET;
	local.sin_port = htons(static_cast<uint16_t>(port));
	local.sin_addr.s_addr = inet_addr(ip);

	if (bind(sock, reinterpret_cast<SA*>(&local), sizeof(local)) < 0) { /* first time */
		perror("bind1 error");
		return -1;
	}

	if (bind(sock, reinterpret_cast<SA*>(&local), sizeof(local)) < 0) { /* second time */
		perror("bind2 error");
		return -1;
	}

	if (listen(sock, 10) < 0) {
		perror("bind error");
		return -1;
	}

	return sock;
}

int test_listenTwoTimes(const char* ip, const int port)
{
	if (ip == NULL || port < 0) {
		return -1;
	}

	/* create socket */
	int sock = socket(AF_INET, SOCK_STREAM, 0);
	if (sock < 0) {
		perror("socket error");
		return -1;
	}

	/* set sock option SO_REUSEADDR for re-bind when calling socket failed */
	int op = 1;
	setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &op, sizeof(op));

	struct sockaddr_in local;
	local.sin_family = AF_INET;
	local.sin_port = htons(static_cast<uint16_t>(port));
	local.sin_addr.s_addr = inet_addr(ip);

	if (bind(sock, reinterpret_cast<SA*>(&local), sizeof(local)) < 0) {
		perror("bind error");
		return -1;
	}

	if (listen(sock, 10) < 0) {
		perror("listen1 error");
		return -1;
	}

	if (listen(sock, 10) < 0) {
		perror("listen2 error");
		return -1;
	}

	return sock;
}

int main()
{
	printf("Test on different socket fd\n");
	{
		printf("Test Case: background\n");
		const char* ip = "0.0.0.0";
		int port = 1025; /* 使用well-known端口号(0~1023)需要root权限*/
		int sockfd = socket_create(ip, port);
		if (sockfd >= 0) {
			printf("Success to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		else {
			printf("Fail to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}

		close(sockfd);
	}

	{
		printf("Test Case1: bind two times on same sockfd\n");
		const char* ip = "0.0.0.0";
		int port = 1025;
		int sockfd = test_bindTwoTimes(ip, port);
		if (sockfd >= 0) {
			printf("Success to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		else {
			printf("Fail to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		close(sockfd);
	}

	{
		printf("Test Case2: bind two times on same sockfd\n");
		const char* ip = "0.0.0.0";
		int port = 65536;
		int sockfd = test_bindTwoTimes(ip, port);
		if (sockfd >= 0) {
			printf("Success to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		else {
			printf("Fail to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		close(sockfd);
	}

	{
		printf("Test Case1: listen two times on same sockfd\n");
		const char* ip = "0.0.0.0";
		int port = 1025;
		int sockfd = test_listenTwoTimes(ip, port);
		if (sockfd >= 0) {
			printf("Success to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		else {
			printf("Fail to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		close(sockfd);
	}

	{
		printf("Test Case2: listen two times on same sockfd\n");
		const char* ip = "0.0.0.0";
		int port = 65536;
		int sockfd = test_listenTwoTimes(ip, port);
		if (sockfd >= 0) {
			printf("Success to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		else {
			printf("Fail to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		close(sockfd);
	}


	///////////////////
	printf("\nTest on same socket fd\n");
	{
		printf("Test Case: background\n");
		const char* ip = "0.0.0.0";
		int port = 1025; /* 使用well-known端口号(0~1023)需要root权限*/
		int sockfd = socket_create(ip, port);
		if (sockfd >= 0) {
			printf("Success to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		else {
			printf("Fail to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
	}

	{
		printf("Test Case1: bind two times on same sockfd\n");
		const char* ip = "0.0.0.0";
		int port = 1025;
		int sockfd = test_bindTwoTimes(ip, port);
		if (sockfd >= 0) {
			printf("Success to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		else {
			printf("Fail to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
	}

	{
		printf("Test Case2: bind two times on same sockfd\n");
		const char* ip = "0.0.0.0";
		int port = 65536;
		int sockfd = test_bindTwoTimes(ip, port);
		if (sockfd >= 0) {
			printf("Success to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		else {
			printf("Fail to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
	}

	{
		printf("Test Case1: listen two times on same sockfd\n");
		const char* ip = "0.0.0.0";
		int port = 1025;
		int sockfd = test_listenTwoTimes(ip, port);
		if (sockfd >= 0) {
			printf("Success to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		else {
			printf("Fail to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
	}

	{
		printf("Test Case2: listen two times on same sockfd\n");
		const char* ip = "0.0.0.0";
		int port = 65536;
		int sockfd = test_listenTwoTimes(ip, port);
		if (sockfd >= 0) {
			printf("Success to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
		else {
			printf("Fail to create sockfd %d on %s:%d\n", sockfd, ip, port);
		}
	}
	return 0;
}