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1030 palkovsky 1 
#include <ipc.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <ns.h>
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#include <errno.h>
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static int service;
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int main(int argc, char **argv)
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{
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    ipc_call_t call;
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    ipc_callid_t callid;
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    ipcarg_t retval, arg1, arg2;
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    printf("Name service started.\n");
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    while (1) {
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        callid = ipc_wait_for_call(&call, 0);
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        printf("Received call from: %P..%Q\n", &call.taskid,call.taskid);
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        switch (IPC_GET_METHOD(call.data)) {
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        case IPC_M_CONNECTTOME:
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            printf("Somebody wants to connect with phoneid %d...accepting\n", IPC_GET_ARG3(call.data));
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            service = IPC_GET_ARG3(call.data);
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            retval = 0;
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            break;
1061 palkovsky 27 
        case IPC_M_CONNECTMETO:
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            printf("Somebody wants to connect to: %d\n",
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                   IPC_GET_ARG1(call.data));
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            retval = 0;
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            break;
1030 palkovsky 32 
        case NS_PING:
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            printf("Ping...%P %P\n", IPC_GET_ARG1(call.data),
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                   IPC_GET_ARG2(call.data));
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            retval = 0;
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            arg1 = 0xdead;
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            arg2 = 0xbeef;
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            break;
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        case NS_PING_SVC:
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            printf("Pinging service %d\n", service);
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            ipc_call_sync(service, NS_PING, 0xbeef, 0);
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            printf("Got pong\n");
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            break;
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        default:
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            printf("Unknown method: %d\n", IPC_GET_METHOD(call.data));
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            retval = ENOENT;
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            break;
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        }
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        ipc_answer(callid, retval, arg1, arg2);
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    }
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}