src/lynq/lib/liblynq-at-extension/lynq_at.cpp

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include <log/log.h>
#include <pthread.h>
#include <errno.h>
#include "liblog/lynq_deflog.h"
#include "include/lib_at/lynq_at.h"

#define LYNQ_AT_SERVICE_PORT 8087
#define OUT_MAX_SIZE 1024
#define USER_LOG_TAG "LYNQ_AT"
#define AT_EXTERSION_SOCKET_NAME "/dev/socket/lynq_atsvc_socket_1"
#define LINE __LINE__
#define FUNC __FUNCTION__
static pthread_mutex_t s_startupMutex = PTHREAD_MUTEX_INITIALIZER;
typedef enum
{
    A_SUCCESS = 0,
    A_ERROR = -1
}LYNQ_AT_E;

/*lei add : maybe sento/revc error*/
int result = A_SUCCESS;
/*lei add : maybe sento/revc error*/
int sockfd = 0;
char *output = NULL;
char buffer_at[OUT_MAX_SIZE] = {0};
struct sockaddr_in addr_serv;
struct sockaddr_un addr_server;


socklen_t len;
LYNQ_AT_CALLBACK tmp = NULL;
bool connect_state = false;
#define SOCKET_ZERO   0
#define SOCKET_SUCC   1
#define SOCKET_FAIL  -1

/**
 * @brief Catch exceptions and free malloc's memory
 * 
 * @param signum Type:[IN] signal
 */
static void signal_handler(int signum)
{
    switch(signum)
    {
         case SIGABRT:
            LYDBGLOG("recv SIGABRT\n");
            break;
         case SIGBUS:
            LYDBGLOG("recv SIGBUS\n");
            break;
         case SIGFPE:
            LYDBGLOG("recv SIGFPE\n");
            break;
         case SIGILL:
            LYDBGLOG("recv SIGILL\n");
            break;
         case SIGSEGV:
            LYDBGLOG("recv SIGSEGV\n");
            break;
         default:
            LYDBGLOG("recv unknown signal\n");
            break;
    }
    if(NULL != output)
    {
        free(output);
        output = NULL;
    }
}


int socket_local_client (char* name) {
    //struct sockaddr_un server;
    //int fd = 0;
    LYINFLOG("[%d][%s] enter",LINE,FUNC);
    sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
    if (sockfd < 0)
    {
        LYDBGLOG("Can't open stream socket (%s)", name);
        return -1;
    }
    addr_server.sun_family = AF_UNIX;
    memset(addr_server.sun_path, '\0', sizeof(addr_server.sun_path));
    strncpy(addr_server.sun_path, name, sizeof(addr_server.sun_path) - 1);
    if (connect(sockfd, (struct sockaddr *) &addr_server, sizeof(struct sockaddr_un)) < 0)
    {
        close(sockfd);
        LYDBGLOG("Can't connect to server side, path: %s, %s", name, strerror(errno));
        return -1;
    }
    LYINFLOG("[%d][%s] connect %s success",LINE,FUNC,name);
    return sockfd;
}
bool send_msg_to_service(int fd,char *msg,int size)
{
    LYDBGLOG("[%d][%s] enter",LINE,FUNC);
    if (fd < 0)
    {
        LYDBGLOG("fd invalid when send to atci service. errno = %d", errno);
        return false;
    }
    if(NULL == msg)
    {
        LYDBGLOG("atcmd is null.");
        return false;
    }
    int sendLen = send(fd, msg, size, 0);
    if (sendLen != size)
    {
        LYDBGLOG("lose data when send to atci service. errno = %d", errno);
        return false;
    }
    LYDBGLOG("client send to app demo: %s", msg);
    return true;
}

int atsvc_cmd_recv(int fd, char *buf, int len)
{
    LYINFLOG("[%d][%s] enter",LINE,FUNC);
    int ret = 0;
    // fd_set rfds;
    // //FD_CLR(fd, &rfds);
    // FD_SET(fd, &rfds);
    // ret = select(fd + 1, &rfds, NULL, NULL, NULL);
    // if (ret <= 0)
    // {
    //     LYDBGLOG("acti_cmd_recv client select error, ret=%d, error=%s(%d),fd=%d", ret,strerror(errno), errno, fd);
    //     return SOCKET_FAIL;
    // }
    // if (FD_ISSET(fd, &rfds))
    // {
        LYDBGLOG("[%d][%s] recv before",LINE,FUNC);
        ret = recv(fd, buf, len, 0);
        LYDBGLOG("[%d][%s] recv after",LINE,FUNC);
        if (ret < 0)
        {
            LYDBGLOG("acti_cmd_recv client select error, ret=%d, error=%s(%d),fd=%d", ret,strerror(errno), errno, fd);
            return SOCKET_FAIL;
        }
        else if(ret == 0)
        {
            LYDBGLOG("acti_cmd_recv client recv error, ret=%d, error=%s(%d),fd=%d", ret,strerror(errno), errno, fd);
            return SOCKET_ZERO;
    }
    // else
    // {
    //   //buf[ret] = '\0';
    // }
//   }
  return SOCKET_SUCC;
}
/**
 * @brief send third cmd to service and receive input,then send output to service
 * 
 * @param parm 
 * @return void* 
 */
void *thread_recv(void *parm)
{
    //signal(SIGPIPE, signal_handler);
    //signal(SIGABRT, signal_handler);
    //signal(SIGBUS, signal_handler);
    //signal(SIGFPE, signal_handler);
    //signal(SIGILL, signal_handler);
    //signal(SIGSEGV, signal_handler);
    LYINFLOG("[%d][%s] enter",LINE,FUNC);
    int recv = 0;
    int send = 0;
    char at_cmd[100] = {0};
    int fd = -1;
    int ret = 0;
    fd = socket_local_client(AT_EXTERSION_SOCKET_NAME);
    if(fd <= 0)
    {
        LYDBGLOG("socket_local_client  fail\n");
        connect_state = false;
        pthread_mutex_unlock(&s_startupMutex);
        return NULL;
    }
    int len_buf = strlen(buffer_at);
    if(!send_msg_to_service(fd,buffer_at,len_buf))
    {
        LYDBGLOG("send_msg_to_service  fail\n");
        connect_state = false;
        pthread_mutex_unlock(&s_startupMutex);
        return NULL;
    }
    connect_state = true;
    pthread_mutex_unlock(&s_startupMutex);
    char *input = NULL;
    output = (char *)malloc(sizeof(char)*OUT_MAX_SIZE);
    if(NULL == output)
    {
        LYDBGLOG("thread_recv malloc fail\n");
        return NULL;
    }
    TryNewLink:
    if(connect_state == false)
    {
        if (connect(fd, (struct sockaddr *) &addr_server, sizeof(struct sockaddr_un)) < 0)
        {
            close(fd);
            LYDBGLOG("Can't connect to server side, path: %s, errno:%d", AT_EXTERSION_SOCKET_NAME, errno);
            return NULL;
        }
        connect_state = true;
    }
    while (1)
    {
        /*receive at cmd*/
        memset(at_cmd, 0, sizeof(at_cmd));
        ret = atsvc_cmd_recv(fd, at_cmd,sizeof(at_cmd));
        if (ret < 0)
        {
            LYDBGLOG("[%d][%s]receive CMD error",LINE,FUNC);
            continue;
        }
        else if(ret == SOCKET_ZERO)
        {
            ALOGE("maybe client socket closed 1. retry new link!");
            connect_state = false;
            goto TryNewLink;
        }
        input = at_cmd;
        //begin deal with callback
        tmp(input, output, OUT_MAX_SIZE);
        LYDBGLOG("lynq_reg_third_at send output to service\n");
        if(!send_msg_to_service(fd,output, strlen(output)))
        {
            LYDBGLOG("thread_recv send fail\n");
            continue;
        }
    }
    free(output);
    output = NULL;
    if(fd != 0)
    {
        close(fd);
    }
    return NULL;
}

/**
 * @brief Threads are created to communicate with the server
 * 
 * @return int 
 */
int lynq_connect_service_start(void)
{
    LYINFLOG("[%d][%s] enter",LINE,FUNC);
    pthread_t lynq_at_tid = -1;
    int rt = pthread_create(&lynq_at_tid, NULL, thread_recv, NULL);
    pthread_mutex_lock(&s_startupMutex);
    LYINFLOG("[%d][%s] pthread mutex unlock",LINE,FUNC);
    LYINFLOG(",rt:%d,connect state:%d\n",rt,connect_state);
    if((connect_state != true) && rt < 0)
    {
        LYERRLOG("connect fail,rt:%d,connect state:%d\n",rt,connect_state);
        return -1;
    }
    return 0;
}

/**
 * @brief Type:[IN] send third at cmd to service
 * @param ext_at Type:[IN] input at cmd
 * @param callback Type:[IN]
 * @return int 
 */
int lynq_reg_third_at(const char *ext_at, LYNQ_AT_CALLBACK callback)
{
    if(NULL == ext_at || NULL == callback)
    {
        return A_ERROR;
    }
    memcpy(buffer_at, ext_at, strlen(ext_at));
    tmp = callback;
    LYLOGSET(LOG_DEBUG);
    LYLOGEINIT(USER_LOG_TAG);
    LYDBGLOG("lynq_reg_third_at start\n");
    int ret = lynq_connect_service_start();
    
    if(ret != 0)
    {
        LYDBGLOG("lynq_connect_service_start start failed\n");
        return A_ERROR;
    }
    LYDBGLOG("lynq_connect_service_start success ret:%d\n",ret);
    return A_SUCCESS;
}