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Added port range check, based on patch from Maxim Bourmistrov

This commit is contained in:
Maxim Bourmistrov 2008-01-07 22:18:27 +00:00 committed by Erik Ekman
parent 7565a2d554
commit ccdee286ad
1 changed files with 10 additions and 4 deletions
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14
src/iodined.c
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@ -495,10 +495,6 @@ main(int argc, char **argv)
break; break;
case 'p': case 'p':
port = atoi(optarg); port = atoi(optarg);
if (port) {
printf("ALERT! Other dns servers expect you to run on port 53.\n");
printf("You must manually forward port 53 to port %d for things to work.\n", port);
}
break; break;
case 'P': case 'P':
strncpy(password, optarg, sizeof(password)); strncpy(password, optarg, sizeof(password));
@ -547,6 +543,16 @@ main(int argc, char **argv)
warnx("Bad MTU given.\n"); warnx("Bad MTU given.\n");
usage(); usage();
} }
if(port < 1 || port > 65535) {
warnx("Bad port number given.\n");
usage();
}
if (port != 53) {
printf("ALERT! Other dns servers expect you to run on port 53.\n");
printf("You must manually forward port 53 to port %d for things to work.\n", port);
}
if (listen_ip == INADDR_NONE) { if (listen_ip == INADDR_NONE) {
warnx("Bad IP address to listen on.\n"); warnx("Bad IP address to listen on.\n");