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annotate cmu200/session.c @ 34:99f753d4ccaf

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fc-cmu200d: check for errors on serial port write
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 23 May 2017 00:33:10 +0000
parents b552e8d86474
children
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bd62be88259d initial import of rfcal code and docs from freecalypso-tools repository
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1 /*
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2 * This module contains the code that handles a single local socket
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3 * connection session.
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4 */
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5
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6 #include <ctype.h>
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7 #include <stdio.h>
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8 #include <stdlib.h>
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9 #include <string.h>
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10 #include <strings.h>
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11
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12 extern int activesock;
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13
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14 #define MAX_FIELDS 10
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15
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16 char client_cmd[256], *client_cmd_fields[MAX_FIELDS+1];
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17 int client_cmd_nfields;
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18
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19 parse_cmd_into_fields()
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20 {
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21 char *cp;
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22
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23 client_cmd_nfields = 0;
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24 for (cp = client_cmd; ; ) {
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25 while (isspace(*cp))
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26 cp++;
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27 if (*cp == '\0')
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28 break;
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29 if (client_cmd_nfields >= MAX_FIELDS) {
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30 send_socket_response("-Command has too many fields\n");
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31 return(1);
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32 }
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33 client_cmd_fields[client_cmd_nfields++] = cp;
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34 while (*cp && !isspace(*cp))
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35 cp++;
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36 if (*cp)
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37 *cp++ = '\0';
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38 }
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39 client_cmd_fields[client_cmd_nfields] = 0;
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40 return(0);
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41 }
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42
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43 handle_command()
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44 {
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45 char readbuf[256];
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46 int cc, pos, rc;
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47
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48 for (pos = 0; ; ) {
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49 cc = read(activesock, readbuf, sizeof readbuf);
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50 if (cc <= 0) {
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51 printf("Client program closed connection\n");
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52 return(1);
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53 }
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54 if (pos + cc > sizeof client_cmd) {
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55 send_socket_response("-Command too long\n");
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56 return(1);
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57 }
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58 bcopy(readbuf, client_cmd + pos, cc);
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59 pos += cc;
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60 if (client_cmd[pos-1] == '\n')
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61 break;
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62 }
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63 client_cmd[pos-1] = '\0';
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64 printf("Client command: %s\n", client_cmd);
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65 rc = parse_cmd_into_fields();
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66 if (rc)
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67 return(0);
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68 if (!client_cmd_nfields) {
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69 send_socket_response("+Empty command OK\n");
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70 return(0);
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71 }
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72 return dispatch_client_command();
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73 }
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74
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75 handle_session()
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76 {
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77 int rc;
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78
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b552e8d86474 fc-cmu200d: started implementing operation modes
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79 cmu200_session_begin();
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80 send_socket_response("+CMU200 interface daemon ready\n");
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81 for (;;) {
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82 rc = handle_command();
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83 if (rc)
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84 break;
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85 }
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86 close(activesock);
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87 stop_signal_gen();
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88 }