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我是 protobuf 的新手

当我通过 recv 端的套接字通信发送 protobuf 变量时,我试图显示 protobuf 的字符串变量,我在这个剩余的数据类型中得到了分段,而不是字符串,它们工作正常,但字符串变量的情况下我得到分段我怎么能过来在 Protobuf 字符串数据类型分段错误中,除了我们有任何其他数据类型用于存储字符串数据类型。

我用字符串变量名创建了一个 proto_socket.proto 我正在用 protoc compiler() 编译 proto_socket.proto它创建两个文件protoc proto_socket.proto --c_out <path>两个文件proto_socket.pb-c.hproto_socket.pb-c.c通过使用这些文件,我创建了一个proto_server.cproto_client.c. 并编译它。但是在两个程序运行时,我在 recv 端发送了一个 protobuf 变量,由于试图显示字符串变量,它给出了分段错误。

proto_socket.proto

syntax="proto2";
message messages{
   optional int32 age=1;
   optional int32 year=2;
   optional string name=3;
}

为 .proto 生成的结构

struct  _Messages
{
   ProtobufCMessage base;
   protobuf_c_boolean has_age;
   int32_t age;
   protobuf_c_boolean has_year;
   int32_t year;
   char *name;
};

proto_client.c

 void *clientThread(void *arg)
 {
   Messages t_message;
  //while(1)
  {
  int32_t s32_send_status;
  t_message.age =70;
  t_message.year=2018;
  t_message.name="anu";

    s32_send_status=send(gs32_clientSocket ,(unsigned char *)
            (&t_message),sizeof(t_message) ,0);
    if(s32_send_status>0){
        printf("data send to server.\n");
    }
    else{
        printf("failed to send data to server\n");
    }
    /*gs32_valread=read( gs32_clientSocket , gars32_buffer , 1024);
    if(gs32_valread==0){
        printf("connection loss\n");
        exit(1);
    }
    else if(gs32_valread<0){
        printf("error:read\n");
        exit(1);
    }
    else{
        printf("server replay:%s\n",gars32_buffer);
    }*/
}
sleep(2);
return NULL;
}

proto_server.c

void *socketThread(void *arg)
{

Messages t_message;

//while(1)
{
    gs32_valread = read( gs32_new_socket,(unsigned char *)
            (&t_message), 1024);
    if(gs32_valread==0){
         printf("disconnected\n");
         exit(1);
    }
    else if(gs32_valread<0){
         printf("error\n");
         exit(1);
    }
    else{
        printf("age=%d\n",t_message.age );
        printf("year=%d\n",t_message.year);
        gs32_birth_year=(t_message.year)-(t_message.age);
        printf("birth year=%d\n",gs32_birth_year);
        printf("name=%s\n",t_message.name);
    }
    sleep(1);
    close(gs32_new_socket);
}
return NULL;
}

结果,

age=70
year=2018
birth year=1948
Segmentation fault (core dumped)
4

0 回答 0