FreeCalypso > hg > freecalypso-tools

annotate rvinterf/lowlevel/packetrx.c @ 964:a96cb97b66a2

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ringtools/imy: fix duplicate definition of tdma_durations[] The bug was reported by Vadim Yanitskiy <fixeria@osmocom.org>, although the present fix is slightly different from the contributed patch: because main.c doesn't need this tdma_durations[] array at all, let's simply remove the reference to this array from main.c rather than turn it into an extern. I no longer remember my original thought flow that resulted (by mistake) in tdma_durations[] being multiply defined in main.c and durations.c. My intent might have been to define all globals in main.c and have the reference in durations.c be an extern - and I missed that extern - but without clear memory, I have no certainty. In any case, having this data array defined in the same module that fills it (durations.c) is sensible, so let's make it the new way.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 31 Aug 2023 19:38:18 +0000
parents e7502631a0f9
children
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1 /*
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2 * This module handles the lowest level of serial packet Rx
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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 <stdlib.h>
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8 #include <unistd.h>
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9 #include "../include/pktmux.h"
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10 #include "../include/limits.h"
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11
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12 extern int target_fd;
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13
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14 u_char rxpkt[MAX_PKT_FROM_TARGET];
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15 size_t rxpkt_len;
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16
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17 static int in_pkt, dle_state, toobig;
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18
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19 static void
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20 process_inbyte(inb)
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21 {
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22 char errbuf[128];
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23
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24 if (!in_pkt) {
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25 if (inb != STX || dle_state) {
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26 rxpkt_len++;
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27 dle_state = (inb == DLE);
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28 return;
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29 }
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30 if (rxpkt_len) {
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31 sprintf(errbuf,
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32 "Warning: Rx %u byte%s outside of a packet",
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33 (unsigned)rxpkt_len, rxpkt_len != 1 ? "s" : "");
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34 output_line(errbuf);
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35 rxpkt_len = 0;
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36 }
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37 in_pkt = 1;
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38 toobig = 0;
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39 return;
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40 }
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41 if (dle_state) {
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42 dle_state = 0;
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43 if (inb != STX && inb != DLE) {
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44 sprintf(errbuf,
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45 "Rx framing error: %02X after DLE", inb);
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46 output_line(errbuf);
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47 in_pkt = 0;
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48 rxpkt_len = 0;
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49 return;
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50 }
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51 goto data;
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52 }
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53 if (inb == DLE) {
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54 dle_state = 1;
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55 return;
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56 } else if (inb == STX) {
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57 if (!rxpkt_len)
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58 return;
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59 in_pkt = 0;
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60 handle_rx_packet();
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61 rxpkt_len = 0;
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62 return;
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63 }
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64 data: if (rxpkt_len >= MAX_PKT_FROM_TARGET) {
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65 if (!toobig) {
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66 output_line("Error: Rx packet too big!");
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67 toobig = 1;
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68 }
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69 return;
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70 }
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71 rxpkt[rxpkt_len++] = inb;
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72 }
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73
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74 void
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75 process_serial_rx()
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76 {
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77 u_char rdbuf[512];
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78 int cc, i;
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79
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80 cc = read(target_fd, rdbuf, sizeof rdbuf);
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81 if (cc <= 0) {
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82 perror("Error/EOF reading from target");
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83 exit(1);
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84 }
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85 for (i = 0; i < cc; i++)
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86 process_inbyte(rdbuf[i]);
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87 }