#include "shm_socket.h"
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#include "hashtable.h"
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#include "logger_factory.h"
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#include <map>
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#include <cassert>
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#include "bus_error.h"
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static Logger *logger = LoggerFactory::getLogger();
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static void print_msg(char *head, shm_msg_t &msg) {
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// err_msg(0, "%s: key=%d, type=%d\n", head, msg.key, msg.type);
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}
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static pthread_once_t _once_ = PTHREAD_ONCE_INIT;
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static pthread_key_t _tmp_recv_socket_key_;
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static void *_server_run_msg_rev(void *_socket);
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static void *_client_run_msg_rev(void *_socket);
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static int _shm_close_dgram_socket(shm_socket_t *socket);
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static int _shm_close_stream_socket(shm_socket_t *socket, bool notifyRemote);
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static void _destrory_tmp_recv_socket_(void *tmp_socket);
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static void _create_tmp_recv_socket_key(void);
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// 检查key是否已经被使用，是返回0, 否返回1
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// static int _shm_socket_check_key(shm_socket_t *socket) {
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// void *tmp_ptr = mm_get_by_key(socket->key);
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// if (tmp_ptr!= NULL && tmp_ptr != (void *)1 && !socket->force_bind ) {
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// bus_errno = EBUS_KEY_INUSED;
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// logger->error("%s. key = %d ", bus_strerror(EBUS_KEY_INUSED), socket->key);
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// return 0;
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// }
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// return 1;
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// }
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// 检查key是否已经被使用， 未被使用则绑定key
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static int check_and_bind_queue(shm_socket_t * sockt) {
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hashtable_t *hashtable = mm_get_hashtable();
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hashtable_lock(hashtable);
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void *tmp_ptr = mm_get_by_key(sockt->key);
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if (tmp_ptr!= NULL && tmp_ptr != (void *)1 && !sockt->force_bind ) {
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hashtable_unlock(hashtable);
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return EBUS_KEY_INUSED;
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}
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sockt->queue = new SHMQueue<shm_msg_t>(sockt->key, 16);
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hashtable_unlock(hashtable);
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return 0;
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}
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SHMQueue<shm_msg_t> *_attach_remote_queue(int key);
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size_t shm_socket_remove_keys(int keys[], size_t length) {
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return SHMQueue<shm_msg_t>::remove_queues(keys, length);
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}
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shm_socket_t *shm_open_socket(shm_socket_type_t socket_type) {
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int s, type;
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pthread_mutexattr_t mtxAttr;
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logger->debug("shm_open_socket\n");
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shm_socket_t *socket = (shm_socket_t *)calloc(1, sizeof(shm_socket_t));
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socket->socket_type = socket_type;
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socket->key = 0;
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socket->force_bind = false;
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socket->dispatch_thread = 0;
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socket->status = SHM_CONN_CLOSED;
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s = pthread_mutexattr_init(&mtxAttr);
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if (s != 0)
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err_exit(s, "pthread_mutexattr_init");
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s = pthread_mutexattr_settype(&mtxAttr, PTHREAD_MUTEX_ERRORCHECK);
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if (s != 0)
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err_exit(s, "pthread_mutexattr_settype");
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s = pthread_mutex_init(&(socket->mutex), &mtxAttr);
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if (s != 0)
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err_exit(s, "pthread_mutex_init");
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s = pthread_mutexattr_destroy(&mtxAttr);
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if (s != 0)
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err_exit(s, "pthread_mutexattr_destroy");
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return socket;
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}
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int shm_close_socket(shm_socket_t *socket) {
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int ret, s;
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logger->debug("shm_close_socket\n");
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switch (socket->socket_type) {
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case SHM_SOCKET_STREAM:
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ret = _shm_close_stream_socket(socket, true);
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break;
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case SHM_SOCKET_DGRAM:
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ret = _shm_close_dgram_socket(socket);
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break;
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default:
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break;
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}
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s = pthread_mutex_destroy(&(socket->mutex) );
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if(s != 0) {
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err_exit(s, "shm_close_socket");
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}
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free(socket);
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return ret;
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}
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// int shm_close_socket(shm_socket_t *socket) {
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// // _destrory_tmp_recv_socket_((shm_socket_t *)pthread_getspecific(_tmp_recv_socket_key_));
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// return shm_close_socket(socket);;
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// }
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int shm_socket_bind(shm_socket_t *socket, int key) {
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socket->key = key;
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return 0;
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}
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int shm_socket_force_bind(shm_socket_t *socket, int key) {
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socket->force_bind = true;
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socket->key = key;
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return 0;
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}
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int shm_socket_get_key(shm_socket_t *sk){
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return sk->key;
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}
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int shm_listen(shm_socket_t *sockt) {
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int rv;
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if (sockt->socket_type != SHM_SOCKET_STREAM) {
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logger->error("can not invoke shm_listen method with a socket which is not a "
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"SHM_SOCKET_STREAM socket");
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exit(1);
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}
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int key;
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hashtable_t *hashtable = mm_get_hashtable();
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if (sockt->key == 0) {
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key = hashtable_alloc_key(hashtable);
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sockt->key = key;
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} else {
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rv = check_and_bind_queue(sockt);
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if(rv !=0 ) {
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return rv;
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}
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}
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sockt->queue = new SHMQueue<shm_msg_t>(sockt->key, 16);
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sockt->acceptQueue = new LockFreeQueue<shm_msg_t, DM_Allocator>(16);
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sockt->clientSocketMap = new std::map<int, shm_socket_t *>;
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sockt->status = SHM_CONN_LISTEN;
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pthread_create(&(sockt->dispatch_thread), NULL, _server_run_msg_rev,
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(void *)sockt);
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return 0;
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}
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/**
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* 接受客户端建立新连接的请求
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*
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*/
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shm_socket_t *shm_accept(shm_socket_t *sockt) {
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if (sockt->socket_type != SHM_SOCKET_STREAM) {
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logger->error("can not invoke shm_accept method with a socket which is not a "
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"SHM_SOCKET_STREAM socket");
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exit(1);
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}
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hashtable_t *hashtable = mm_get_hashtable();
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int client_key;
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shm_socket_t *client_socket;
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shm_msg_t src;
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if (sockt->acceptQueue->pop(src) == 0) {
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// print_msg("===accept:", src);
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client_key = src.key;
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// client_socket = (shm_socket_t *)malloc(sizeof(shm_socket_t));
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client_socket = shm_open_socket(sockt->socket_type);
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client_socket->key = sockt->key;
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// client_socket->queue= socket->queue;
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//初始化消息queue
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client_socket->messageQueue =
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new LockFreeQueue<shm_msg_t, DM_Allocator>(16);
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//连接到对方queue
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client_socket->remoteQueue = _attach_remote_queue(client_key);
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sockt->clientSocketMap->insert({client_key, client_socket});
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/*
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* shm_accept 用户执行的方法
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* 与_server_run_msg_rev在两个不同的限制工作,accept要保证在客户的发送消息之前完成资源的准备工作，以避免出现竞态问题
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*/
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//发送open_reply,回应客户端的connect请求
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struct timespec timeout = {1, 0};
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shm_msg_t msg;
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msg.key = sockt->key;
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msg.size = 0;
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msg.type = SHM_SOCKET_OPEN_REPLY;
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if (client_socket->remoteQueue->push(msg, &timeout, BUS_TIMEOUT_FLAG) == 0) {
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client_socket->status = SHM_CONN_ESTABLISHED;
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return client_socket;
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} else {
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logger->error( "shm_accept: 发送open_reply失败");
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return NULL;
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}
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} else {
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err_exit(errno, "shm_accept");
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}
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return NULL;
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}
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/**
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* @return 0成功. 其他值失败
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*/
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int shm_connect(shm_socket_t *sockt, int key) {
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int rv;
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if (sockt->socket_type != SHM_SOCKET_STREAM) {
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logger->error( "can not invoke shm_connect method with a socket which is not "
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"a SHM_SOCKET_STREAM socket");
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exit(1);
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}
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hashtable_t *hashtable = mm_get_hashtable();
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if (hashtable_get(hashtable, key) == NULL) {
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logger->error("shm_connect：connect at key %d failed!", key);
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return -1;
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}
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if (sockt->key == 0) {
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sockt->key = hashtable_alloc_key(hashtable);
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sockt->queue = new SHMQueue<shm_msg_t>(sockt->key, 16);
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} else {
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rv = check_and_bind_queue(sockt);
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if(rv != 0 ) {
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return rv;
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}
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}
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if ((sockt->remoteQueue = _attach_remote_queue(key)) == NULL) {
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logger->error("connect to %d failted", key);
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return -1;
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}
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sockt->messageQueue = new LockFreeQueue<shm_msg_t, DM_Allocator>(16);
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//发送open请求
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struct timespec timeout = {1, 0};
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shm_msg_t msg;
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msg.key = sockt->key;
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msg.size = 0;
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msg.type = SHM_SOCKET_OPEN;
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sockt->remoteQueue->push(msg, &timeout, BUS_TIMEOUT_FLAG);
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//接受open reply
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if (sockt->queue->pop(msg) == 0) {
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// 在这里server端已经准备好接受客户端发送请求了,完成与服务端的连接
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if (msg.type == SHM_SOCKET_OPEN_REPLY) {
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sockt->status = SHM_CONN_ESTABLISHED;
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pthread_create(&(sockt->dispatch_thread), NULL, _client_run_msg_rev,
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(void *)sockt);
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} else {
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logger->error( "shm_connect: 不匹配的应答信息!");
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exit(1);
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}
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} else {
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logger->error( "connect failted!");
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return -1;
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}
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return 0;
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}
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int shm_send(shm_socket_t *sockt, const void *buf, const int size) {
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if (sockt->socket_type != SHM_SOCKET_STREAM) {
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logger->error("shm_socket.shm_send: can not invoke shm_send method with a socket which is not a "
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"SHM_SOCKET_STREAM socket");
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exit(1);
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}
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hashtable_t *hashtable = mm_get_hashtable();
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if(sockt->remoteQueue == NULL) {
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err_msg(errno, "当前客户端无连接!");
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return -1;
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}
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shm_msg_t dest;
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dest.type = SHM_COMMON_MSG;
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dest.key = sockt->key;
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dest.size = size;
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dest.buf = mm_malloc(size);
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memcpy(dest.buf, buf, size);
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if (sockt->remoteQueue->push(dest) == 0) {
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return 0;
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} else {
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logger->error(errno, "connection has been closed!");
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return -1;
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}
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}
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int shm_recv(shm_socket_t *sockt, void **buf, int *size) {
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if (sockt->socket_type != SHM_SOCKET_STREAM) {
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logger->error( "shm_socket.shm_recv: can not invoke shm_recv method in a %d type socket which is "
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"not a SHM_SOCKET_STREAM socket ",
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sockt->socket_type);
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exit(1);
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}
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shm_msg_t src;
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if (sockt->messageQueue->pop(src) == 0) {
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void *_buf = malloc(src.size);
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memcpy(_buf, src.buf, src.size);
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*buf = _buf;
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*size = src.size;
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mm_free(src.buf);
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return 0;
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} else {
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return -1;
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}
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}
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// 短连接方式发送
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int shm_sendto(shm_socket_t *sockt, const void *buf, const int size,
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const int key, const struct timespec *timeout, const int flag) {
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int s;
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int rv;
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if (sockt->socket_type != SHM_SOCKET_DGRAM) {
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logger->error( "shm_socket.shm_sendto: Can't invoke shm_sendto method in a %d type socket which is "
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"not a SHM_SOCKET_DGRAM socket ",
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sockt->socket_type);
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exit(0);
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}
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hashtable_t *hashtable = mm_get_hashtable();
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if ((s = pthread_mutex_lock(&(sockt->mutex))) != 0)
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err_exit(s, "shm_sendto : pthread_mutex_lock");
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if (sockt->queue == NULL) {
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if (sockt->key == 0) {
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sockt->key = hashtable_alloc_key(hashtable);
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sockt->queue = new SHMQueue<shm_msg_t>(sockt->key, 16);
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} else {
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rv = check_and_bind_queue(sockt);
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if(rv !=0 ) {
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return rv;
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}
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}
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}
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if ((s = pthread_mutex_unlock(&(sockt->mutex))) != 0)
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err_exit(s, "shm_sendto : pthread_mutex_unlock");
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// There is some case where a sockt need to send to himeself, for example when bus server need to stop, he need to send himself
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// a top message.
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if (key == sockt->key) {
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logger->error( "can not send to your self!");
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return EBUS_SENDTO_SELF;
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}
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SHMQueue<shm_msg_t> *remoteQueue;
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if ((remoteQueue = _attach_remote_queue(key)) == NULL) {
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bus_errno = EBUS_CLOSED;
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logger->error("sendto key %d failed, %s", key, bus_strerror(bus_errno));
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return EBUS_CLOSED;
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}
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shm_msg_t dest;
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dest.type = SHM_COMMON_MSG;
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dest.key = sockt->key;
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dest.size = size;
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dest.buf = mm_malloc(size);
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memcpy(dest.buf, buf, size);
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rv = remoteQueue->push(dest, timeout, flag);
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if (rv == 0) {
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printf("%d sendto %d suc.\n", shm_socket_get_key(sockt), key);
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return 0;
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} else {
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mm_free(dest.buf);
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logger->debug("%d sendto key %d failed %s", shm_socket_get_key(sockt), key, bus_strerror(rv));
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return rv;
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}
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}
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// 短连接方式接受
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int shm_recvfrom(shm_socket_t *sokt, void **buf, int *size, int *key, const struct timespec *timeout, int flag) {
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int s;
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int rv;
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if (sokt->socket_type != SHM_SOCKET_DGRAM) {
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logger->error("shm_socket.shm_recvfrom: Can't invoke shm_recvfrom method in a %d type socket which "
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"is not a SHM_SOCKET_DGRAM socket ",
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sokt->socket_type);
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exit(1);
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}
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hashtable_t *hashtable = mm_get_hashtable();
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if ((s = pthread_mutex_lock(&(sokt->mutex))) != 0)
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err_exit(s, "shm_recvfrom : pthread_mutex_lock");
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if (sokt->queue == NULL) {
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if (sokt->key == 0) {
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sokt->key = hashtable_alloc_key(hashtable);
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sokt->queue = new SHMQueue<shm_msg_t>(sokt->key, 16);
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} else {
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rv = check_and_bind_queue(sokt);
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if(rv != 0 ) {
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return rv;
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}
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}
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}
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if ((s = pthread_mutex_unlock(&(sokt->mutex))) != 0)
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err_exit(s, "shm_recvfrom : pthread_mutex_unlock");
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shm_msg_t src;
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rv = sokt->queue->pop(src, timeout, flag);
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if (rv == 0) {
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if(buf != NULL) {
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void *_buf = malloc(src.size);
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memcpy(_buf, src.buf, src.size);
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*buf = _buf;
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}
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if(size != NULL)
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*size = src.size;
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if(key != NULL)
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*key = src.key;
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mm_free(src.buf);
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return 0;
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} else {
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logger->debug("shm_recvfrom failed %s", bus_strerror(rv));
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return rv;
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}
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}
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/* Free thread-specific data buffer */
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static void _destrory_tmp_recv_socket_(void *tmp_socket)
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{
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int rv;
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if(tmp_socket == NULL)
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return;
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logger->debug("%d destroy tmp socket\n", pthread_self());
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shm_close_socket((shm_socket_t *)tmp_socket);
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rv = pthread_setspecific(_tmp_recv_socket_key_, NULL);
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if ( rv != 0) {
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logger->error(rv, "shm_sendandrecv : pthread_setspecific");
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exit(1);
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}
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}
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/* One-time key creation function */
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static void _create_tmp_recv_socket_key(void)
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{
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int s;
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/* Allocate a unique thread-specific data key and save the address
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of the destructor for thread-specific data buffers */
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s = pthread_key_create(&_tmp_recv_socket_key_, _destrory_tmp_recv_socket_);
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//s = pthread_key_create(&_tmp_recv_socket_key_, NULL);
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if (s != 0) {
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logger->error(s, "pthread_key_create");
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abort(); /* dump core and terminate */
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exit(1);
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}
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}
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// use thread local
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int _shm_sendandrecv_thread_local(shm_socket_t *socket, const void *send_buf,
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const int send_size, const int send_key, void **recv_buf,
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int *recv_size, const struct timespec *timeout, int flags) {
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int recv_key;
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int rv;
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// 用thread local 保证每个线程用一个独占的socket接受对方返回的信息
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shm_socket_t *tmp_socket;
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if (socket->socket_type != SHM_SOCKET_DGRAM) {
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logger->error( "shm_socket.shm_sendandrecv: Can't invoke shm_sendandrecv method in a %d type socket "
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"which is not a SHM_SOCKET_DGRAM socket ",
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socket->socket_type);
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exit(1);
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}
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|
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rv = pthread_once(&_once_, _create_tmp_recv_socket_key);
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if (rv != 0) {
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logger->error(rv, "shm_sendandrecv pthread_once");
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exit(1);
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}
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tmp_socket = (shm_socket_t *)pthread_getspecific(_tmp_recv_socket_key_);
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if (tmp_socket == NULL)
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{
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/* If first call from this thread, allocate buffer for thread, and save its location */
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logger->debug("%ld create tmp socket\n", (long)pthread_self() );
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tmp_socket = shm_open_socket(SHM_SOCKET_DGRAM);
|
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rv = pthread_setspecific(_tmp_recv_socket_key_, tmp_socket);
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if ( rv != 0) {
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logger->error(rv, "shm_sendandrecv : pthread_setspecific");
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exit(1);
|
}
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}
|
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if ((rv = shm_sendto(tmp_socket, send_buf, send_size, send_key, timeout, flags)) == 0) {
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rv = shm_recvfrom(tmp_socket, recv_buf, recv_size, &recv_key, timeout, flags);
|
if(rv != 0) {
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printf("_shm_sendandrecv_thread_local : %s\n", bus_strerror(rv));
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}
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else if(rv == 0 ) {
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assert( send_key == recv_key);
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if(send_key != recv_key) {
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err_exit(0, "_shm_sendandrecv_thread_local: send key expect to equal to recv key! send key =%d , recv key=%d", send_key, recv_key);
|
}
|
|
}
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return rv;
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} else {
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return rv;
|
}
|
}
|
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int _shm_sendandrecv_alloc_new(shm_socket_t *sockt, const void *send_buf,
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const int send_size, const int send_key, void **recv_buf,
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int *recv_size, const struct timespec *timeout, int flags) {
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int recv_key;
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int rv;
|
|
// 用thread local 保证每个线程用一个独占的socket接受对方返回的信息
|
shm_socket_t *tmp_socket;
|
|
if (sockt->socket_type != SHM_SOCKET_DGRAM) {
|
logger->error( "shm_socket.shm_sendandrecv: Can't invoke shm_sendandrecv method in a %d type socket "
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"which is not a SHM_SOCKET_DGRAM socket ",
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sockt->socket_type);
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exit(1);
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}
|
|
/* If first call from this thread, allocate buffer for thread, and save its location */
|
// logger->debug("%d create tmp socket\n", pthread_self() );
|
tmp_socket = shm_open_socket(SHM_SOCKET_DGRAM);
|
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if ((rv = shm_sendto(tmp_socket, send_buf, send_size, send_key, timeout, flags)) == 0) {
|
rv = shm_recvfrom(tmp_socket, recv_buf, recv_size, &recv_key, timeout, flags);
|
printf("======%d use tmp_socket %d, send to %d, receive from %d\n", shm_socket_get_key(sockt), shm_socket_get_key(tmp_socket), send_key, recv_key);
|
|
if(rv != 0) {
|
printf("_shm_sendandrecv_alloc_new : %s\n", bus_strerror(rv));
|
}
|
else if(rv == 0 ) {
|
assert( send_key == recv_key);
|
if(send_key != recv_key) {
|
err_exit(0, "_shm_sendandrecv_alloc_new: send key expect to equal to recv key! send key =%d , recv key=%d", send_key, recv_key);
|
}
|
|
}
|
}
|
|
shm_close_socket(tmp_socket);
|
return rv;
|
|
}
|
|
int shm_sendandrecv(shm_socket_t *socket, const void *send_buf,
|
const int send_size, const int send_key, void **recv_buf,
|
int *recv_size, const struct timespec *timeout, int flags) {
|
|
return _shm_sendandrecv_alloc_new(socket, send_buf, send_size, send_key,recv_buf, recv_size, timeout, flags);
|
}
|
|
|
// ============================================================================================================
|
|
/**
|
* 绑定key到队列，但是并不会创建队列。如果没有对应指定key的队列提示错误并退出
|
*/
|
SHMQueue<shm_msg_t> *_attach_remote_queue(int key) {
|
|
hashtable_t *hashtable = mm_get_hashtable();
|
if (hashtable_get(hashtable, key) == NULL) {
|
//logger->error("shm_socket._remote_queue_attach：connet at key %d failed!", key);
|
return NULL;
|
}
|
|
SHMQueue<shm_msg_t> *queue = new SHMQueue<shm_msg_t>(key, 0);
|
return queue;
|
}
|
|
void _server_close_conn_to_client(shm_socket_t *socket, int key) {
|
shm_socket_t *client_socket;
|
std::map<int, shm_socket_t *>::iterator iter =
|
socket->clientSocketMap->find(key);
|
if (iter != socket->clientSocketMap->end()) {
|
client_socket = iter->second;
|
free((void *)client_socket);
|
socket->clientSocketMap->erase(iter);
|
}
|
}
|
|
/**
|
* server端各种类型消息（）在这里进程分拣
|
*/
|
void *_server_run_msg_rev(void *_socket) {
|
pthread_detach(pthread_self());
|
shm_socket_t *socket = (shm_socket_t *)_socket;
|
struct timespec timeout = {1, 0};
|
shm_msg_t src;
|
shm_socket_t *client_socket;
|
std::map<int, shm_socket_t *>::iterator iter;
|
|
while (socket->queue->pop(src) == 0) {
|
|
switch (src.type) {
|
case SHM_SOCKET_OPEN:
|
socket->acceptQueue->push(src, &timeout, BUS_TIMEOUT_FLAG);
|
break;
|
case SHM_SOCKET_CLOSE:
|
_server_close_conn_to_client(socket, src.key);
|
break;
|
case SHM_COMMON_MSG:
|
|
iter = socket->clientSocketMap->find(src.key);
|
if (iter != socket->clientSocketMap->end()) {
|
client_socket = iter->second;
|
// print_msg("_server_run_msg_rev push before", src);
|
client_socket->messageQueue->push(src, &timeout, BUS_TIMEOUT_FLAG);
|
// print_msg("_server_run_msg_rev push after", src);
|
}
|
|
break;
|
|
default:
|
logger->error("shm_socket._server_run_msg_rev: undefined message type.");
|
}
|
}
|
|
return NULL;
|
}
|
|
void _client_close_conn_to_server(shm_socket_t *socket) {
|
|
_shm_close_stream_socket(socket, false);
|
}
|
|
/**
|
* client端的各种类型消息（）在这里进程分拣
|
*/
|
void *_client_run_msg_rev(void *_socket) {
|
pthread_detach(pthread_self());
|
shm_socket_t *socket = (shm_socket_t *)_socket;
|
struct timespec timeout = {1, 0};
|
shm_msg_t src;
|
|
while (socket->queue->pop(src) == 0) {
|
switch (src.type) {
|
|
case SHM_SOCKET_CLOSE:
|
_client_close_conn_to_server(socket);
|
break;
|
case SHM_COMMON_MSG:
|
socket->messageQueue->push(src, &timeout, BUS_TIMEOUT_FLAG);
|
break;
|
default:
|
logger->error( "shm_socket._client_run_msg_rev: undefined message type.");
|
}
|
}
|
|
return NULL;
|
}
|
|
int _shm_close_stream_socket(shm_socket_t *socket, bool notifyRemote) {
|
socket->status = SHM_CONN_CLOSED;
|
//给对方发送一个关闭连接的消息
|
struct timespec timeout = {1, 0};
|
shm_msg_t close_msg;
|
|
close_msg.key = socket->key;
|
close_msg.size = 0;
|
close_msg.type = SHM_SOCKET_CLOSE;
|
if (notifyRemote && socket->remoteQueue != NULL) {
|
socket->remoteQueue->push(close_msg, &timeout, BUS_TIMEOUT_FLAG);
|
}
|
|
if (socket->queue != NULL) {
|
delete socket->queue;
|
socket->queue = NULL;
|
}
|
|
|
|
if (socket->messageQueue != NULL) {
|
delete socket->messageQueue;
|
socket->messageQueue = NULL;
|
}
|
|
if (socket->acceptQueue != NULL) {
|
delete socket->acceptQueue;
|
socket->acceptQueue = NULL;
|
}
|
|
if (socket->clientSocketMap != NULL) {
|
shm_socket_t *client_socket;
|
for (auto iter = socket->clientSocketMap->begin();
|
iter != socket->clientSocketMap->end(); iter++) {
|
client_socket = iter->second;
|
|
client_socket->remoteQueue->push(close_msg, &timeout, BUS_TIMEOUT_FLAG);
|
client_socket->remoteQueue = NULL;
|
|
delete client_socket->messageQueue;
|
client_socket->messageQueue = NULL;
|
free((void *)client_socket);
|
}
|
delete socket->clientSocketMap;
|
}
|
|
if (socket->dispatch_thread != 0)
|
pthread_cancel(socket->dispatch_thread);
|
|
|
return 0;
|
|
}
|
|
int _shm_close_dgram_socket(shm_socket_t *socket){
|
if(socket->queue != NULL) {
|
delete socket->queue;
|
socket->queue = NULL;
|
}
|
|
return 0;
|
}
|
|
|
