FreeCalypso > hg > freecalypso-tools

annotate rvinterf/lowlevel/rvtdump.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 6f078c4a5506
children
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0
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Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * This program reads bytes from a serial port, parses them assuming
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3 * TI's RVT MUX format, and prints every decoded packet.
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4 */
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5
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6 #include <sys/types.h>
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parents:
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7 #include <sys/errno.h>
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parents:
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8 #include <stdio.h>
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parents:
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9 #include <stdlib.h>
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parents:
diff changeset
10 #include <unistd.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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11 #include <time.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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12 #include "../include/pktmux.h"
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parents:
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13
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parents:
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14 extern int target_fd;
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parents:
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15
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parents:
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16 extern u_char rxpkt[];
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parents:
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17 extern size_t rxpkt_len;
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parents:
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18
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parents:
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19 char *logfname;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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20 FILE *logF;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 time_t logtime;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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22 int background;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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23 int no_output; /* for output.c */
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parents:
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24
253
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25 static char *baudrate = "115200";
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26
222
7168f63fc3b8 rvinterf: implemented keepalive mechanism
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
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27 static char keepalive_msg[] =
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Mychaela Falconia <falcon@freecalypso.org>
parents: 0
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28 "Received keepalive query, unable to respond, please run rvinterf";
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29
0
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parents:
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30 main(argc, argv)
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31 char **argv;
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32 {
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Mychaela Falconia <falcon@freecalypso.org>
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33 extern char *optarg;
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34 extern int optind;
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Mychaela Falconia <falcon@freecalypso.org>
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35 int c;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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36 fd_set fds;
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37
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38 while ((c = getopt(argc, argv, "bB:d:l:")) != EOF)
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parents:
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39 switch (c) {
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40 case 'b':
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Mychaela Falconia <falcon@freecalypso.org>
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41 background++;
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Mychaela Falconia <falcon@freecalypso.org>
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42 no_output++; /* for output.c */
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43 continue;
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44 case 'B':
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45 baudrate = optarg;
0
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46 continue;
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parents:
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47 case 'd':
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48 target_fd = atoi(optarg);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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49 continue;
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parents:
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50 case 'l':
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51 logfname = optarg;
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parents:
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52 continue;
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parents:
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53 case '?':
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parents:
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54 default:
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55 usage: fprintf(stderr,
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56 "usage: %s [options] ttyport\n", argv[0]);
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57 exit(1);
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parents:
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58 }
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parents:
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59 if (background && !logfname) {
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60 fprintf(stderr, "%s: -b is meaningless without -l\n", argv[0]);
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61 exit(1);
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62 }
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Mychaela Falconia <falcon@freecalypso.org>
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63 if (target_fd <= 0) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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64 if (argc - optind != 1)
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parents:
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65 goto usage;
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66 open_serial_port(argv[optind]);
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67 set_fixed_baudrate(baudrate);
0
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parents:
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68 }
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parents:
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69
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parents:
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70 set_serial_nonblock(0);
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71 setlinebuf(stdout);
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parents:
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72 if (logfname) {
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parents:
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73 logF = fopen(logfname, "w");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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74 if (!logF) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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75 perror(logfname);
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76 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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77 }
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78 setlinebuf(logF);
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79 fprintf(logF, "*** Log of decoded RVT output ***\n");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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80 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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81 if (background) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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82 c = fork();
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parents:
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83 if (c < 0) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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84 perror("fork");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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85 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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86 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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87 if (c) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88 printf("rvtdump forked into background (pid %d)\n", c);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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89 exit(0);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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90 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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91 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 for (;;) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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93 FD_ZERO(&fds);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
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94 FD_SET(target_fd, &fds);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 c = select(target_fd+1, &fds, 0, 0, 0);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 time(&logtime);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 if (c < 0) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98 if (errno == EINTR)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99 continue;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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100 perror("select");
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
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101 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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102 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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103 if (FD_ISSET(target_fd, &fds))
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 process_serial_rx();
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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105 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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106 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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107
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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108 handle_rx_packet()
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109 {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
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110 switch (rxpkt[0]) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111 case RVT_RV_HEADER:
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112 if (rxpkt_len < 6)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
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113 goto unknown;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
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114 print_rv_trace();
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
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115 return;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 case RVT_L1_HEADER:
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 print_l1_trace();
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
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118 return;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 case RVT_L23_HEADER:
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 print_g23_trace();
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 return;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 case RVT_TM_HEADER:
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 print_tm_output_raw();
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 return;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 case RVT_AT_HEADER:
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 print_ati_output();
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 return;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 case RVT_EXTUI_HEADER:
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 if (rxpkt_len < 5 || !(rxpkt_len & 1))
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 goto unknown;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 report_extui_packet();
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 return;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 case RVT_TCH_HEADER:
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 print_tch_output_raw();
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 return;
222
7168f63fc3b8 rvinterf: implemented keepalive mechanism
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
136 case RVT_KEEPALIVE_HEADER:
7168f63fc3b8 rvinterf: implemented keepalive mechanism
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
137 if (rxpkt_len != 2 || rxpkt[1] != 'Q')
7168f63fc3b8 rvinterf: implemented keepalive mechanism
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
138 goto unknown;
7168f63fc3b8 rvinterf: implemented keepalive mechanism
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
139 output_line(keepalive_msg);
7168f63fc3b8 rvinterf: implemented keepalive mechanism
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
140 return;
0
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 case '*':
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 print_fc_lld_msg();
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 return;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 default:
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 unknown:
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 print_unknown_packet();
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 }