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我有一个在 Solaris 中运行的 RPC 服务器。我有一个在 Solaris 中运行良好的 RPC 客户端。
当我在 Ubuntu 中编译和运行相同的代码时，我正在进入Error decoding arguments服务器。

Solaris 使用 SunRPC (ONC RPC)。不知道如何找到 rpc 的版本。

Linux 和 Solaris 中可用的 RPC 有什么区别吗？
在 Solaris 和 Linux 中生成的 xdr 之间会不会有任何不匹配？

我应该如何发现问题？

注意：代码不能发布

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3 回答 3

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在与同一软件集成期间，我确实遇到了这个错误。Linux 版本确实产生了不好的请求。这种行为的原因是空 c 字符串的序列化。Glibc 版本的 SUN rpc 无法对其进行编码，xdr_string 返回零。但是您正在处理的样本将“pin”设置为 0。只需将“pin”替换为“”，或者在 xdr_string() 上创建一些包装器，样本就可以工作。

我的 PowerKey 示例补丁如下所示：

<       if (!xdr_string(xdrs, objp, PIN_SZ))
<               return (FALSE);
<       return (TRUE);
---
>     char *t = "";
>     return  xdr_string(xdrs, *objp? objp : &t , PIN_SZ);

但它当然可以变得更简单。一般来说，您应该修复生成代码的使用，在我的情况下，它是软件作者提供的示例源中的“pin”变量，必须在调用 xdr_string() 之前初始化。

于 2013-09-10T07:19:10.163 回答
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@twalberg, @cppcoder 你解决问题了吗？我有同样的问题，但如果有帮助，我可以发布我的代码。代码的某些部分是：

/* 现在分配一个 LoopListRequestStruct 并用请求数据填充它 */

llrs = malloc(sizeof(LoopListRequestStruct));

fill_llrs(llrs);

/* Now, make the client request to the bossServer   */

client_call_status = clnt_call(request_client, ModifyDhctState,
        (xdrproc_t)xdr_LoopListRequestStruct,
        (caddr_t)llrs, 
        (xdrproc_t)xdr_void,
        0,
        dummy_timeval
    );

无效填充_llrs（LoopListRequestStruct* llrs）{

Descriptor_Loop* dl = 0;
DhctState_d *dhct_state_ptr = 0;
PackageAuthorization_d *pkg_auth_ptr = 0; 

llrs->TRANS_NUM = 999999;   /* strictly arbitraty, use whatever you want */
                                                    /* the bossServer simply passes this back in */
                                                    /* in the response you use it to match       */
                                                    /* request/response if you want or you can   */
                                                    /* choose to ignore it if you want           */

/* now set the response program number, this is the program number of  */
/* transient program that was set up using the svc_reg_utils.[ch]      */
/* it is that program that the response will be sent to                */

llrs->responseProgramNum = response_program_number; 

/* now allocate some memory for the data structures that will actually */
/* carry the request data */

llrs->ARG_PTR = malloc(sizeof(LoopListRequestArgs));

dl = llrs->ARG_PTR->loopList.Loop_List_val;

/* we are using a single descriptor loop at a time, this should always */
/* be the case */

llrs->ARG_PTR->loopList.Loop_List_len = 1;
llrs->ARG_PTR->loopList.Loop_List_val = malloc(sizeof(Descriptor_Loop));

/* now allocate memory and set the size for the ModifyDhctConfiguration */
/* this transaction always has 3 descriptors, the DhctMacAddr_d, the    */
/* DhctState_d, and the PackageAuthorization_d                          */

dl = llrs->ARG_PTR->loopList.Loop_List_val;
dl->Descriptor_Loop_len = 2;
dl->Descriptor_Loop_val = 
    malloc((2 * sizeof(Resource_descriptor_union)));

/* now, populate each descriptor */
/* the order doesn't really matter I'm just doing it in the order I    */
/* always have done */

/* first the mac address descriptor */

dl->Descriptor_Loop_val->type = 
    dhct_mac_addr_type;

strcpy(
    dl->Descriptor_Loop_val[0].Resource_descriptor_union_u.dhctMacAddr.dhctMacAddr,
    dhct_mac_addr
);

/* second the dhct state descriptor */

dl->Descriptor_Loop_val[1].type = 
    dhct_state_type;

dhct_state_ptr =
    &(dl->Descriptor_Loop_val[1].Resource_descriptor_union_u.dhctState);

if(dis_enable)
    dhct_state_ptr->disEnableFlag = DIS_Enabled;
else
    dhct_state_ptr->disEnableFlag = DIS_Disabled;

if(dms_enable)
    dhct_state_ptr->dmsEnableFlag = DMS_Enabled;
else
    dhct_state_ptr->dmsEnableFlag = DMS_Disabled;

if(analog_enable)
    dhct_state_ptr->analogEnableFlag = AEF_Enabled;
else
    dhct_state_ptr->analogEnableFlag = AEF_Disabled;

if(ippv_enable)
    dhct_state_ptr->ippvEnableFlag = IEF_Enabled;
else
    dhct_state_ptr->ippvEnableFlag = IEF_Disabled;

dhct_state_ptr->creditLimit = credit_limit;
dhct_state_ptr->maxIppvEvents = max_ippv_events;

/* we don't currently use the powerkey pin, instead we use an      */
/* application layer pin for purchases and blocking so always turn */   
/* pinEnable off */

dhct_state_ptr->pinEnable = PE_Disabled;
dhct_state_ptr->pin = 0;


if(fast_refresh_enable)
    dhct_state_ptr->fastRefreshFlag = FRF_Enabled;
else
    dhct_state_ptr->fastRefreshFlag = FRF_Disabled;

dhct_state_ptr->locationX = location_x;
dhct_state_ptr->locationY = location_y;

}

于 2013-07-05T06:28:54.517 回答
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请注意，XDR 将处理字节序，但如果您使用特定于应用程序的不透明字段，如果您自己不处理字节序，解码将会中断。确保整数作为 XDR 整数发送

于 2018-01-06T14:10:12.897 回答