#include "shm_mod_socket.h"
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#include "bus_server_socket.h"
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static Logger *logger = LoggerFactory::getLogger();
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size_t ShmModSocket::remove_keys(int keys[], size_t length) {
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BusServerSocket::remove_subscripters(keys, length);
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return shm_socket_remove_keys(keys, length);
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}
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ShmModSocket::ShmModSocket() {
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shm_socket = shm_open_socket(SHM_SOCKET_DGRAM);
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bus_set = new std::set<int>;
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}
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ShmModSocket::~ShmModSocket() {
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// logger->debug("Close ShmModSocket...\n");
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struct timespec timeout = {1, 0};
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if(bus_set != NULL) {
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for(auto bus_iter = bus_set->begin(); bus_iter != bus_set->end(); bus_iter++) {
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desub(NULL, 0, *bus_iter, &timeout, BUS_TIMEOUT_FLAG);
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}
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delete bus_set;
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}
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shm_close_socket(shm_socket);
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}
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int ShmModSocket::bind(int key) {
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return shm_socket_bind(shm_socket, key);
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}
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/**
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* 强制绑定端口到socket, 适用于程序非正常关闭的情况下，重启程序绑定原来还没释放的key
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* @return 0 成功， 其他值 失败的错误码
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*/
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int ShmModSocket::force_bind(int key) {
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return shm_socket_force_bind(shm_socket, key);
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}
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/**
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* 发送信息
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* @key 发送给谁
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* @return 0 成功， 其他值 失败的错误码
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*/
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int ShmModSocket::sendto(const void *buf, const int size, const int key, const struct timespec *timeout, int flag) {
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int rv = shm_sendto(shm_socket, buf, size, key, timeout, flag);
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if(rv == 0) {
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logger->debug("ShmModSocket::sendto: %d sendto %d success.\n", get_key(), key);
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return 0;
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}
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logger->debug("ShmModSocket::sendto : %d sendto %d failed %s", get_key(), key, bus_strerror(rv));
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return rv;
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}
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/**
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* 接收信息
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* @key 从谁哪里收到的信息
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* @return 0 成功， 其他值 失败的错误码
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*/
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int ShmModSocket::recvfrom( void **buf, int *size, int *key, const struct timespec *timeout, int flag) {
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int rv = shm_recvfrom(shm_socket, buf, size, key, timeout, flag);
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if(rv == 0) {
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logger->debug("ShmModSocket::recvfrom: %d recvfrom %d success.\n", get_key(), *key);
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return 0;
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}
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logger->debug("ShmModSocket::recvfrom: socket %d recvfrom failed %s", get_key(), bus_strerror(rv));
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return rv;
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}
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/**
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* 发送请求信息并等待接收应答
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* @key 发送给谁
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* @return 0 成功， 其他值 失败的错误码
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*/
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int ShmModSocket::sendandrecv(const void *send_buf, const int send_size, const int send_key,
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void **recv_buf, int *recv_size, const struct timespec *timeout, int flag){
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return shm_sendandrecv(shm_socket, send_buf, send_size, send_key, recv_buf, recv_size, timeout, flag);
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}
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// 超时返回。 @sec 秒 ， @nsec 纳秒
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int ShmModSocket::sendandrecv_unsafe(const void *send_buf, const int send_size, const int send_key,
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void **recv_buf, int *recv_size, const struct timespec *timeout, int flag){
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return shm_sendandrecv_unsafe(shm_socket, send_buf, send_size, send_key, recv_buf, recv_size, timeout, flag);
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}
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/**
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* 订阅指定主题
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* @topic 主题
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* @size 主题长度
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* @key 总线端口
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*/
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int ShmModSocket::sub(char *topic, int topic_size, int key,
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const struct timespec *timeout, int flags) {
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int ret;
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bus_head_t head = {};
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memcpy(head.action, "sub", sizeof(head.action));
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head.topic_size = topic_size = strlen(topic) + 1;
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head.content_size = 0;
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void *buf;
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int size = get_bus_sendbuf(head, topic, topic_size, NULL, 0, &buf);
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if(size > 0) {
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ret = shm_sendto(shm_socket, buf, size, key, timeout, flags);
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free(buf);
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if(ret == 0) {
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bus_set->insert(key);
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}
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return ret;
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} else {
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return -1;
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}
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}
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/**
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* 取消订阅指定主题
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* @topic 主题
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* @size 主题长度
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* @key 总线端口
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*/
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int ShmModSocket::desub(char *topic, int topic_size, int key, const struct timespec *timeout, int flags) {
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// char buf[8192];
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int ret;
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if(topic == NULL) {
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topic = "";
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}
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// snprintf(buf, 8192, "%sdesub%s%s%s%s", ACTION_LIDENTIFIER, ACTION_RIDENTIFIER, TOPIC_LIDENTIFIER, topic, TOPIC_RIDENTIFIER);
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// return shm_sendto(shm_socket, buf, strlen(buf) + 1, key, timeout, flags);
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bus_head_t head = {};
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memcpy(head.action, "desub", sizeof(head.action));
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head.topic_size = topic_size = strlen(topic) + 1;
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head.content_size = 0;
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void *buf;
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int size = get_bus_sendbuf(head, topic, topic_size, NULL, 0, &buf);
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if(size > 0) {
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ret = shm_sendto(shm_socket, buf, size, key, timeout, flags);
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free(buf);
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if(ret == 0) {
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return 0;
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} else {
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logger->error("ShmModSocket::_desub_ key %d failed, %s", key, bus_strerror(ret));
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return ret;
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}
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} else {
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return -1;
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}
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}
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/**
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* 发布主题
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* @topic 主题
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* @content 主题内容
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* @key 总线端口
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*/
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int ShmModSocket::pub(char *topic, int topic_size, void *content, int content_size, int key, const struct timespec *timeout, int flags) {
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int ret;
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bus_head_t head = {};
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memcpy(head.action, "pub", sizeof(head.action));
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head.topic_size = topic_size = strlen(topic) + 1;
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head.content_size = content_size;
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void *buf;
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int size = get_bus_sendbuf(head, topic, topic_size, content, content_size, &buf);
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if(size > 0) {
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ret = shm_sendto(shm_socket, buf, size, key, timeout, flags);
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free(buf);
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return ret;
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} else {
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return -1;
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}
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}
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/**
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* 获取soket key
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*/
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int ShmModSocket::get_key(){
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return shm_socket->key;
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}
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// =============================================================================
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int ShmModSocket::get_bus_sendbuf(bus_head_t &request_head,
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void *topic_buf, int topic_size, void *content_buf, int content_size, void **retbuf) {
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int buf_size;
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char *buf;
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int max_buf_size;
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if((buf = (char *) malloc(MAXBUF)) == NULL) {
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LoggerFactory::getLogger()->error(errno, "ShmModSocket::get_bus_sendbuf malloc");
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exit(1);
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} else {
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max_buf_size = MAXBUF;
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}
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buf_size = BUS_HEAD_SIZE + content_size + topic_size ;
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if(max_buf_size < buf_size) {
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if((buf = (char *) realloc(buf, buf_size)) == NULL) {
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LoggerFactory::getLogger()->error(errno, "ShmModSocket::get_bus_sendbuf realloc buf");
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exit(1);
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} else {
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max_buf_size = buf_size;
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}
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}
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memcpy(buf, ShmModSocket::encode_bus_head(request_head), BUS_HEAD_SIZE);
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if(topic_size != 0 )
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memcpy(buf + BUS_HEAD_SIZE, topic_buf, topic_size);
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if(content_size != 0)
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memcpy(buf + BUS_HEAD_SIZE + topic_size, content_buf, content_size);
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*retbuf = buf;
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return buf_size;
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}
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/**
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char action[];
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uint32_t topic_size;
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uint32_t content_size;
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*/
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void * ShmModSocket::encode_bus_head(bus_head_t & head) {
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void * headbs = malloc(BUS_HEAD_SIZE);
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char *tmp_ptr = (char *)headbs;
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memcpy(tmp_ptr, head.action, sizeof(head.action));
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tmp_ptr += sizeof(head.action);
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PUT(tmp_ptr, htonl(head.topic_size));
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tmp_ptr += 4;
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PUT(tmp_ptr, htonl(head.content_size));
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return headbs;
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}
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bus_head_t ShmModSocket::decode_bus_head(void *headbs) {
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char *tmp_ptr = (char *)headbs;
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bus_head_t head;
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memcpy(head.action, tmp_ptr, sizeof(head.action));
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tmp_ptr += sizeof(head.action);
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head.topic_size = ntohl(GET(tmp_ptr));
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tmp_ptr += 4;
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head.content_size = ntohl(GET(tmp_ptr));
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return head;
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}
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