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annotate rvinterf/tmsh/pktsort.c @ 272:9c34d938a645

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doc/RVTMUX: TMFFS protocol versions documented
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Fri, 07 Feb 2014 07:29:36 +0000
parents c146f38d2b5f
children 40b8557b9d04
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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 "etm.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
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19 void
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20 safe_print_trace(src, srclen, dest)
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21 u_char *src;
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22 char *dest;
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23 {
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24 int i, c;
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25 char *dp;
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26
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27 dp = dest;
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28 for (i = 0; i < srclen; i++) {
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29 c = src[i];
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30 if (c & 0x80) {
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31 *dp++ = 'M';
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32 *dp++ = '-';
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33 c &= 0x7F;
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34 }
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35 if (c < 0x20) {
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36 *dp++ = '^';
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37 *dp++ = c + '@';
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38 } else if (c == 0x7F) {
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39 *dp++ = '^';
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40 *dp++ = '?';
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41 } else
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42 *dp++ = c;
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43 }
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44 *dp = '\0';
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45 }
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46
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47 static void
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48 handle_useid_0()
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49 {
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50 char buf[MAX_PKT_FROM_TARGET*4];
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51
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52 if (strncmp(rvi_msg + 7, "RVT: Lost Message", 17))
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53 return;
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54 safe_print_trace(rvi_msg + 7, rvi_msg_len - 7, buf);
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55 async_msg_output(buf);
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56 }
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57
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58 static void
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59 print_etm_trace()
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60 {
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61 char buf[MAX_PKT_FROM_TARGET*4];
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62
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63 strcpy(buf, "ETM Tr: ");
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64 safe_print_trace(rvi_msg + 7, rvi_msg_len - 7, buf + 9);
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65 async_msg_output(buf);
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66 }
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67
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68 static void
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69 process_rvt()
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70 {
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71 u32 useid;
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72
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73 if (rvi_msg_len < 7) {
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74 tty_cleanup();
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75 fprintf(stderr, "Error: rvinterf sent us an invalid RVT msg\n");
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76 exit(1);
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77 }
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78 useid = rvi_msg[2] << 24 | rvi_msg[3] << 16 | rvi_msg[4] << 8
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79 | rvi_msg[5];
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80 switch (useid) {
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81 case 0:
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82 handle_useid_0();
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83 return;
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84 case ETM_USE_ID:
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85 print_etm_trace();
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86 return;
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87 default:
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88 tty_cleanup();
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89 fprintf(stderr, "unexpected fwd of USEID %08X from rvinterf\n",
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90 useid);
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91 exit(1);
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92 }
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93 }
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94
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95 void
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96 process_pkt_from_target()
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97 {
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98 switch (rvi_msg[1]) {
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99 case RVT_RV_HEADER:
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100 process_rvt();
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101 return;
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102 case RVT_TM_HEADER:
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103 etm_packet_rx();
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104 return;
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105 default:
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106 tty_cleanup();
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107 fprintf(stderr, "unexpected fwd of MUX %02X from rvinterf\n",
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108 rvi_msg[1]);
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109 exit(1);
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110 }
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111 }