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Added port range check, based on patch from Maxim Bourmistrov
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@ -495,10 +495,6 @@ main(int argc, char **argv)
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break;
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case 'p':
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port = atoi(optarg);
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if (port) {
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printf("ALERT! Other dns servers expect you to run on port 53.\n");
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printf("You must manually forward port 53 to port %d for things to work.\n", port);
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}
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break;
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case 'P':
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strncpy(password, optarg, sizeof(password));
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@ -547,6 +543,16 @@ main(int argc, char **argv)
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warnx("Bad MTU given.\n");
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usage();
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}
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if(port < 1 || port > 65535) {
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warnx("Bad port number given.\n");
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usage();
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}
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if (port != 53) {
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printf("ALERT! Other dns servers expect you to run on port 53.\n");
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printf("You must manually forward port 53 to port %d for things to work.\n", port);
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}
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if (listen_ip == INADDR_NONE) {
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warnx("Bad IP address to listen on.\n");
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