FreeCalypso > hg > freecalypso-tools

annotate rvinterf/asyncshell/pktsort.c @ 407:19e5a3e2f9c0

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fcup-settime: moved time() retrieval a little closer to the output A fundamental problem with all simple time transfer tools is that there is always some delay between the time retrieval on the source system and that transmitted time being set on the destination, and the resulting time on the destination system is off by that delay amount. This delay cannot be fully eliminated when working in a simple environment like ours, but we should make our best effort to minimize it. In the present case, moving the atinterf_init() call before the time() retrieval should make a teensy-tiny improvement.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 11 Aug 2018 21:52:17 +0000
parents bbc41034f14c
children 31a36b400cdf
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1 /*
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2 * Here we sort out incoming packets from the target relayed via rvinterf.
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3 */
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4
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5 #include <sys/types.h>
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6 #include <stdio.h>
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7 #include <string.h>
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8 #include <strings.h>
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9 #include <stdlib.h>
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10 #include "pktmux.h"
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11 #include "limits.h"
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12 #include "localsock.h"
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13 #include "localtypes.h"
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14 #include "exitcodes.h"
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15
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16 extern u_char rvi_msg[];
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17 extern int rvi_msg_len;
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18 extern int oneshot_mode;
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19
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20 static void
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21 process_rvt()
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22 {
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23 u32 useid;
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24
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25 if (rvi_msg_len < 7) {
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26 tty_cleanup();
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27 fprintf(stderr, "Error: rvinterf sent us an invalid RVT msg\n");
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28 exit(ERROR_RVINTERF);
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29 }
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30 useid = rvi_msg[2] << 24 | rvi_msg[3] << 16 | rvi_msg[4] << 8
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31 | rvi_msg[5];
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32 switch (useid) {
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33 case 0:
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34 handle_useid_0();
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35 return;
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36 default:
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37 tty_cleanup();
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38 fprintf(stderr, "unexpected fwd of USEID %08X from rvinterf\n",
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39 useid);
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40 exit(ERROR_RVINTERF);
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41 }
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42 }
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43
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44 static void
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45 gpf_packet_rx()
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46 {
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47 char fmtbuf[MAX_PKT_FROM_TARGET*8]; /* size it generously */
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48
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49 format_g23_packet(rvi_msg + 1, rvi_msg_len - 1, fmtbuf);
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50 async_msg_output(fmtbuf);
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51 }
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53 static void
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54 response_from_ati()
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55 {
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56 char buf[MAX_PKT_FROM_TARGET*4+2];
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57
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58 strcpy(buf, "ATI: ");
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59 safe_print_trace(rvi_msg + 2, rvi_msg_len - 2, buf + 5);
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60 async_msg_output(buf);
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61 if (oneshot_mode)
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62 oneshot_at_check_response();
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63 }
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64
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65 void
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66 process_pkt_from_target()
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67 {
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68 switch (rvi_msg[1]) {
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69 case RVT_RV_HEADER:
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70 process_rvt();
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71 return;
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72 case RVT_L23_HEADER:
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73 gpf_packet_rx();
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74 return;
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75 case RVT_AT_HEADER:
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76 response_from_ati();
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77 return;
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78 case RVT_TCH_HEADER:
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79 tch_packet_rx();
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80 return;
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81 default:
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82 tty_cleanup();
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83 fprintf(stderr, "unexpected fwd of MUX %02X from rvinterf\n",
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84 rvi_msg[1]);
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85 exit(ERROR_RVINTERF);
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86 }
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87 }