diff options
Diffstat (limited to 'mDNSResponder/Clients/dnsctl.c')
| -rw-r--r-- | mDNSResponder/Clients/dnsctl.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/mDNSResponder/Clients/dnsctl.c b/mDNSResponder/Clients/dnsctl.c new file mode 100644 index 00000000..f040e1fb --- /dev/null +++ b/mDNSResponder/Clients/dnsctl.c @@ -0,0 +1,177 @@ +/* -*- Mode: C; tab-width: 4 -*- + * + * Copyright (c) 2012 Apple Inc. All rights reserved. + * + * dnsctl.c + * Command-line tool using libdns_services.dylib + * + * To build only this tool, copy and paste the following on the command line: + * On Apple 64bit Platforms ONLY OSX/iOS: + * clang -Wall dnsctl.c /usr/lib/libdns_services.dylib -o dnsctl + * + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/time.h> +#include <net/if.h> // if_nametoindex() + +#include <dispatch/dispatch.h> +#include "dns_services.h" + +//************************************************************************************************************* +// Globals: +//************************************************************************************************************* + +static const char kFilePathSep = '/'; +static DNSXConnRef ClientRef = NULL; + +//************************************************************************************************************* +// Utility Funcs: +//************************************************************************************************************* + +static void printtimestamp(void) +{ + struct tm tm; + int ms; + static char date[16]; + static char new_date[16]; + struct timeval tv; + gettimeofday(&tv, NULL); + localtime_r((time_t*)&tv.tv_sec, &tm); + ms = tv.tv_usec/1000; + strftime(new_date, sizeof(new_date), "%a %d %b %Y", &tm); + //display date only if it has changed + if (strncmp(date, new_date, sizeof(new_date))) + { + printf("DATE: ---%s---\n", new_date); + strncpy(date, new_date, sizeof(date)); + } + printf("%2d:%02d:%02d.%03d ", tm.tm_hour, tm.tm_min, tm.tm_sec, ms); +} + +static void print_usage(const char *arg0) +{ + fprintf(stderr, "%s USAGE: \n", arg0); + fprintf(stderr, "%s -DP Enable DNS Proxy with Default Parameters \n", arg0); + fprintf(stderr, "%s -DP [-o <output interface>] [-i <input interface(s)>] Enable DNS Proxy \n", arg0); +} + +//************************************************************************************************************* +// CallBack Funcs: +//************************************************************************************************************* + +// DNSXEnableProxy Callback from the Daemon +static void dnsproxy_reply(DNSXConnRef connRef, DNSXErrorType errCode) +{ + (void) connRef; + printtimestamp(); + switch (errCode) + { + case kDNSX_NoError : printf(" SUCCESS \n"); break; + case kDNSX_DictError : printf(" DICT ERROR \n"); break; + case kDNSX_DaemonNotRunning : printf(" NO DAEMON \n"); + DNSXRefDeAlloc(ClientRef); break; + case kDNSX_Engaged : printf(" ENGAGED \n"); + DNSXRefDeAlloc(ClientRef); break; + case kDNSX_UnknownErr : + default : printf("UNKNOWN ERR \n"); + DNSXRefDeAlloc(ClientRef); break; + } + +} + +//************************************************************************************************************* + +int main(int argc, char **argv) +{ + DNSXErrorType err; + + // Default i/p intf is lo0 and o/p intf is primary interface + IfIndex Ipintfs[MaxInputIf] = {1, 0, 0, 0, 0}; + IfIndex Opintf = kDNSIfindexAny; + + // Extract program name from argv[0], which by convention contains the path to this executable + const char *a0 = strrchr(argv[0], kFilePathSep) + 1; + if (a0 == (const char *)1) + a0 = argv[0]; + + // Must run as root + if (0 != geteuid()) + { + fprintf(stderr, "%s MUST run as root!!\n", a0); + exit(-1); + } + if ((sizeof(argv) == 8)) + printf("dnsctl running in 64-bit mode\n"); + else if ((sizeof(argv) == 4)) + printf("dnsctl running in 32-bit mode\n"); + + // expects atleast one argument + if (argc < 2) + goto Usage; + + if ( !strcmp(argv[1], "-DP") || !strcmp(argv[1], "-dp") ) + { + if (argc == 2) + { + printtimestamp(); + printf("Proceeding to Enable DNSProxy on mDNSResponder with Default Parameters\n"); + dispatch_queue_t my_Q = dispatch_queue_create("com.apple.dnsctl.callback_queue", NULL); + err = DNSXEnableProxy(&ClientRef, kDNSProxyEnable, Ipintfs, Opintf, my_Q, dnsproxy_reply); + } + else if (argc > 2) + { + argc--; + argv++; + if (!strcmp(argv[1], "-o")) + { + Opintf = if_nametoindex(argv[2]); + if (!Opintf) + Opintf = atoi(argv[2]); + if (!Opintf) + { + fprintf(stderr, "Could not parse o/p interface [%s]: Passing default primary \n", argv[2]); + Opintf = kDNSIfindexAny; + } + argc -= 2; + argv += 2; + } + if (argc > 2 && !strcmp(argv[1], "-i")) + { + int i; + argc--; + argv++; + for (i = 0; i < MaxInputIf && argc > 1; i++) + { + Ipintfs[i] = if_nametoindex(argv[1]); + if (!Ipintfs[i]) + Ipintfs[i] = atoi(argv[1]); + if (!Ipintfs[i]) + { + fprintf(stderr, "Could not parse i/p interface [%s]: Passing default lo0 \n", argv[2]); + Ipintfs[i] = 1; + } + argc--; + argv++; + } + } + printtimestamp(); + printf("Proceeding to Enable DNSProxy on mDNSResponder \n"); + dispatch_queue_t my_Q = dispatch_queue_create("com.apple.dnsctl.callback_queue", NULL); + err = DNSXEnableProxy(&ClientRef, kDNSProxyEnable, Ipintfs, Opintf, my_Q, dnsproxy_reply); + } + } + else + { + goto Usage; + } + + dispatch_main(); + +Usage: + print_usage(a0); + return 0; +} + |