@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。部分代码是：
/* 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
);
void fill_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;
}