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POCSAG: Fixed handling of loopback and scanning feature

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This commit is contained in:
Andreas Eversberg
2021-11-21 09:28:53 +01:00
parent dde4113e61
commit c2a01fb7dd
4 changed files with 73 additions and 19 deletions
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27
src/pocsag/main.c
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@@ -80,9 +80,13 @@ void print_help(const char *arg0)
printf(" Translate German spcial characters from/to UTF-8.\n");
printf(" -S --scan <from> <to>\n");
printf(" Scan through given IDs once (no repetition). This can be useful to find\n");
printf(" the RIC of a vintage receiver. Note that scanning all RICs from 0\n");
printf(" through 2097151 would take about 16.5 Hours at 1200 Baud and known sub\n");
printf(" RIC.\n");
printf(" the RIC of a vintage pager. Note that scanning all RICs from 0 through\n");
printf(" 2097151 would take about 16.5 Hours at 1200 Baud and known sub RIC.\n");
printf(" Use -F to select function of the pager. Short messages with 5 numeric\n");
printf(" or 2 alphanumeric characters are sent without increase in scanning\n");
printf(" time. The upper 5 digits of the RIC are sent as message, if numeric\n");
printf(" function was selected. The upper 3 digits of the RIC are sent as\n");
printf(" message (2 digits hexadecimal), if alphanumeric function was selected.\n");
printf("\n");
printf("File: %s\n", MSG_SEND);
printf(" Write \"<ric>,0,message\" to it to send a numerical message.\n");
@@ -179,7 +183,7 @@ static int handle_options(int short_option, int argi, char **argv)
return -EINVAL;
}
scan_to = atoi(argv[argi++]) + 1;
if (scan_to > 2097151) {
if (scan_to > 2097151 + 1) {
fprintf(stderr, "Given RIC to scan to is out of range!\n");
return -EINVAL;
}
@@ -251,6 +255,9 @@ int main(int argc, char *argv[])
int i;
double frequency;
/* pocsag does not use emphasis, so disable it */
uses_emphasis = 0;
/* init common tones */
init_besetzton();
@@ -292,13 +299,23 @@ int main(int argc, char *argv[])
num_device = 1; /* use default */
if (num_kanal != num_device) {
fprintf(stderr, "You need to specify as many sound devices as you have channels.\n");
exit(0);
goto fail;
}
/* TX is default */
if (!tx && !rx)
tx = 1;
/* TX & RX if loopback */
if (loopback)
tx = rx = 1;
/* no TX, no scanning */
if (!tx && scan_to > scan_from) {
fprintf(stderr, "You need to enable TX, in order to scan.\n");
goto fail;
}
/* create pipe for message sendy */
unlink(MSG_SEND);
rc = mkfifo(MSG_SEND, 0666);