FreeCalypso > hg > freecalypso-tools

annotate rvinterf/l1filter/rvif_rx.c @ 926:6a0aa8d36d06

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rvinterf backslash escape: introduce libprint The new helper function library named libprint is meant to replace the badly misnamed libg23, and will soon contain functions for printing all of the same kinds of GPF TST packets that are now handled in libg23. However, we are also moving safe_print_trace() from libasync to this new library, and changing it to emit our new backslash escape format.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 23 May 2023 03:47:46 +0000
parents ea458ee48691
children
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1 /*
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2 * This module implements message Rx from 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 <stdlib.h>
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8 #include <unistd.h>
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9 #include "localsock.h"
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10 #include "exitcodes.h"
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12 extern int sock;
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14 u_char rvi_msg[LOCALSOCK_MAX_MSG];
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15 int rvi_msg_len;
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16
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17 static int rx_state, rx_left;
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18 static u_char *rx_ptr;
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19
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20 void
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21 localsock_prep_for_length_rx()
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22 {
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23 rx_state = 0;
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24 rx_ptr = rvi_msg;
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25 rx_left = 2;
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26 }
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27
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28 static void
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29 prep_for_message_rx()
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30 {
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31 rx_state = 1;
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32 rx_ptr = rvi_msg;
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33 rx_left = rvi_msg_len;
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34 }
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35
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36 void
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37 process_msg_from_rvinterf()
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38 {
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39 switch (rvi_msg[0]) {
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40 case RVI2CLI_PKT_FROM_TARGET:
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41 process_pkt_from_target();
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42 return;
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43 case RVI2CLI_LOCAL_CMD_RESP:
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44 if (rvi_msg_len < 2)
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45 goto bad;
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46 if (rvi_msg[1] == '+')
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47 return;
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48 fprintf(stderr, "Error from rvinterf: %.*s\n", rvi_msg_len - 1,
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49 rvi_msg + 1);
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50 exit(ERROR_RVINTERF);
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51 default:
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52 bad:
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53 fprintf(stderr,
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54 "Error: unexpected message type %02X from rvinterf\n",
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55 rvi_msg[0]);
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56 exit(ERROR_RVINTERF);
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57 }
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58 }
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59
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60 void
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61 handle_rvinterf_input()
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62 {
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63 int cc;
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65 cc = read(sock, rx_ptr, rx_left);
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66 if (cc <= 0) {
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67 perror("read from rvinterf socket");
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68 exit(ERROR_RVINTERF);
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69 }
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70 rx_ptr += cc;
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71 rx_left -= cc;
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72 if (rx_left)
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73 return;
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74 /* got the thing, process it */
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75 if (rx_state) {
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76 process_msg_from_rvinterf();
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77 localsock_prep_for_length_rx();
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78 } else {
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79 rvi_msg_len = rvi_msg[0] << 8 | rvi_msg[1];
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80 if (rvi_msg_len < 1 || rvi_msg_len > LOCALSOCK_MAX_MSG) {
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81 fprintf(stderr,
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82 "Invalid length from rvinterf: %02X%02X\n",
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83 rvi_msg[0], rvi_msg[1]);
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84 exit(ERROR_RVINTERF);
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85 }
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86 prep_for_message_rx();
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87 }
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88 }