added unbound to external deps

1 files changed, 438 insertions, 0 deletions

diff --git a/external/unbound/smallapp/unbound-control.c b/external/unbound/smallapp/unbound-control.c
new file mode 100644
index 000000000..9b78cef94
--- /dev/null
+++ b/external/unbound/smallapp/unbound-control.c
@@ -0,0 +1,438 @@
+/*
+ * checkconf/unbound-control.c - remote control utility for unbound.
+ *
+ * Copyright (c) 2008, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * \file
+ *
+ * The remote control utility contacts the unbound server over ssl and
+ * sends the command, receives the answer, and displays the result
+ * from the commandline.
+ */
+
+#include "config.h"
+#ifdef HAVE_GETOPT_H
+#include <getopt.h>
+#endif
+#ifdef HAVE_OPENSSL_SSL_H
+#include <openssl/ssl.h>
+#endif
+#ifdef HAVE_OPENSSL_ERR_H
+#include <openssl/err.h>
+#endif
+#ifdef HAVE_OPENSSL_RAND_H
+#include <openssl/rand.h>
+#endif
+#include "util/log.h"
+#include "util/config_file.h"
+#include "util/locks.h"
+#include "util/net_help.h"
+
+/** Give unbound-control usage, and exit (1). */
+static void
+usage()
+{
+	printf("Usage:	unbound-control [options] command\n");
+	printf("	Remote control utility for unbound server.\n");
+	printf("Options:\n");
+	printf("  -c file	config file, default is %s\n", CONFIGFILE);
+	printf("  -s ip[@port]	server address, if omitted config is used.\n");
+	printf("  -q		quiet (don't print anything if it works ok).\n");
+	printf("  -h		show this usage help.\n");
+	printf("Commands:\n");
+	printf("  start				start server; runs unbound(8)\n");
+	printf("  stop				stops the server\n");
+	printf("  reload			reloads the server\n");
+	printf("  				(this flushes data, stats, requestlist)\n");
+	printf("  stats				print statistics\n");
+	printf("  stats_noreset			peek at statistics\n");
+	printf("  status			display status of server\n");
+	printf("  verbosity <number>		change logging detail\n");
+	printf("  log_reopen			close and open the logfile\n");
+	printf("  local_zone <name> <type>	add new local zone\n");
+	printf("  local_zone_remove <name>	remove local zone and its contents\n");
+	printf("  local_data <RR data...>	add local data, for example\n");
+	printf("				local_data www.example.com A 192.0.2.1\n");
+	printf("  local_data_remove <name>	remove local RR data from name\n");
+	printf("  dump_cache			print cache to stdout\n");
+	printf("  load_cache			load cache from stdin\n");
+	printf("  lookup <name>			print nameservers for name\n");
+	printf("  flush <name>			flushes common types for name from cache\n");
+	printf("  				types:  A, AAAA, MX, PTR, NS,\n");
+	printf("					SOA, CNAME, DNAME, SRV, NAPTR\n");
+	printf("  flush_type <name> <type>	flush name, type from cache\n");
+	printf("  flush_zone <name>		flush everything at or under name\n");
+	printf("  				from rr and dnssec caches\n");
+	printf("  flush_bogus			flush all bogus data\n");
+	printf("  flush_negative		flush all negative data\n");
+	printf("  flush_stats 			flush statistics, make zero\n");
+	printf("  flush_requestlist 		drop queries that are worked on\n");
+	printf("  dump_requestlist		show what is worked on\n");
+	printf("  flush_infra [all | ip] 	remove ping, edns for one IP or all\n");
+	printf("  dump_infra			show ping and edns entries\n");
+	printf("  set_option opt: val		set option to value, no reload\n");
+	printf("  get_option opt		get option value\n");
+	printf("  list_stubs			list stub-zones and root hints in use\n");
+	printf("  list_forwards			list forward-zones in use\n");
+	printf("  list_local_zones		list local-zones in use\n");
+	printf("  list_local_data		list local-data RRs in use\n");
+	printf("  insecure_add zone 		add domain-insecure zone\n");
+	printf("  insecure_remove zone		remove domain-insecure zone\n");
+	printf("  forward_add [+i] zone addr..	add forward-zone with servers\n");
+	printf("  forward_remove [+i] zone	remove forward zone\n");
+	printf("  stub_add [+ip] zone addr..	add stub-zone with servers\n");
+	printf("  stub_remove [+i] zone		remove stub zone\n");
+	printf("		+i		also do dnssec insecure point\n");
+	printf("		+p		set stub to use priming\n");
+	printf("  forward [off | addr ...]	without arg show forward setup\n");
+	printf("				or off to turn off root forwarding\n");
+	printf("				or give list of ip addresses\n");
+	printf("Version %s\n", PACKAGE_VERSION);
+	printf("BSD licensed, see LICENSE in source package for details.\n");
+	printf("Report bugs to %s\n", PACKAGE_BUGREPORT);
+	exit(1);
+}
+
+/** exit with ssl error */
+static void ssl_err(const char* s)
+{
+	fprintf(stderr, "error: %s\n", s);
+	ERR_print_errors_fp(stderr);
+	exit(1);
+}
+
+/** setup SSL context */
+static SSL_CTX*
+setup_ctx(struct config_file* cfg)
+{
+	char* s_cert, *c_key, *c_cert;
+	SSL_CTX* ctx;
+
+	s_cert = fname_after_chroot(cfg->server_cert_file, cfg, 1);
+	c_key = fname_after_chroot(cfg->control_key_file, cfg, 1);
+	c_cert = fname_after_chroot(cfg->control_cert_file, cfg, 1);
+	if(!s_cert || !c_key || !c_cert)
+		fatal_exit("out of memory");
+        ctx = SSL_CTX_new(SSLv23_client_method());
+	if(!ctx)
+		ssl_err("could not allocate SSL_CTX pointer");
+        if(!(SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2))
+		ssl_err("could not set SSL_OP_NO_SSLv2");
+	if(!SSL_CTX_use_certificate_file(ctx,c_cert,SSL_FILETYPE_PEM) ||
+		!SSL_CTX_use_PrivateKey_file(ctx,c_key,SSL_FILETYPE_PEM)
+		|| !SSL_CTX_check_private_key(ctx))
+		ssl_err("Error setting up SSL_CTX client key and cert");
+	if (SSL_CTX_load_verify_locations(ctx, s_cert, NULL) != 1)
+		ssl_err("Error setting up SSL_CTX verify, server cert");
+	SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
+
+	free(s_cert);
+	free(c_key);
+	free(c_cert);
+	return ctx;
+}
+
+/** contact the server with TCP connect */
+static int
+contact_server(const char* svr, struct config_file* cfg, int statuscmd)
+{
+	struct sockaddr_storage addr;
+	socklen_t addrlen;
+	int fd;
+	/* use svr or the first config entry */
+	if(!svr) {
+		if(cfg->control_ifs)
+			svr = cfg->control_ifs->str;
+		else	svr = "127.0.0.1";
+		/* config 0 addr (everything), means ask localhost */
+		if(strcmp(svr, "0.0.0.0") == 0)
+			svr = "127.0.0.1";
+		else if(strcmp(svr, "::0") == 0 ||
+			strcmp(svr, "0::0") == 0 ||
+			strcmp(svr, "0::") == 0 ||
+			strcmp(svr, "::") == 0)
+			svr = "::1";
+	}
+	if(strchr(svr, '@')) {
+		if(!extstrtoaddr(svr, &addr, &addrlen))
+			fatal_exit("could not parse IP@port: %s", svr);
+	} else {
+		if(!ipstrtoaddr(svr, cfg->control_port, &addr, &addrlen))
+			fatal_exit("could not parse IP: %s", svr);
+	}
+	fd = socket(addr_is_ip6(&addr, addrlen)?AF_INET6:AF_INET, 
+		SOCK_STREAM, 0);
+	if(fd == -1) {
+#ifndef USE_WINSOCK
+		fatal_exit("socket: %s", strerror(errno));
+#else
+		fatal_exit("socket: %s", wsa_strerror(WSAGetLastError()));
+#endif
+	}
+	if(connect(fd, (struct sockaddr*)&addr, addrlen) < 0) {
+#ifndef USE_WINSOCK
+		log_err_addr("connect", strerror(errno), &addr, addrlen);
+		if(errno == ECONNREFUSED && statuscmd) {
+			printf("unbound is stopped\n");
+			exit(3);
+		}
+#else
+		log_err_addr("connect", wsa_strerror(WSAGetLastError()), &addr, addrlen);
+		if(WSAGetLastError() == WSAECONNREFUSED && statuscmd) {
+			printf("unbound is stopped\n");
+			exit(3);
+		}
+#endif
+		exit(1);
+	}
+	return fd;
+}
+
+/** setup SSL on the connection */
+static SSL*
+setup_ssl(SSL_CTX* ctx, int fd)
+{
+	SSL* ssl;
+	X509* x;
+	int r;
+
+	ssl = SSL_new(ctx);
+	if(!ssl)
+		ssl_err("could not SSL_new");
+	SSL_set_connect_state(ssl);
+	(void)SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY);
+	if(!SSL_set_fd(ssl, fd))
+		ssl_err("could not SSL_set_fd");
+	while(1) {
+		ERR_clear_error();
+		if( (r=SSL_do_handshake(ssl)) == 1)
+			break;
+		r = SSL_get_error(ssl, r);
+		if(r != SSL_ERROR_WANT_READ && r != SSL_ERROR_WANT_WRITE)
+			ssl_err("SSL handshake failed");
+		/* wants to be called again */
+	}
+
+	/* check authenticity of server */
+	if(SSL_get_verify_result(ssl) != X509_V_OK)
+		ssl_err("SSL verification failed");
+	x = SSL_get_peer_certificate(ssl);
+	if(!x)
+		ssl_err("Server presented no peer certificate");
+	X509_free(x);
+	return ssl;
+}
+
+/** send stdin to server */
+static void
+send_file(SSL* ssl, FILE* in, char* buf, size_t sz)
+{
+	while(fgets(buf, (int)sz, in)) {
+		if(SSL_write(ssl, buf, (int)strlen(buf)) <= 0)
+			ssl_err("could not SSL_write contents");
+	}
+}
+
+/** send command and display result */
+static int
+go_cmd(SSL* ssl, int quiet, int argc, char* argv[])
+{
+	char pre[10];
+	const char* space=" ";
+	const char* newline="\n";
+	int was_error = 0, first_line = 1;
+	int r, i;
+	char buf[1024];
+	snprintf(pre, sizeof(pre), "UBCT%d ", UNBOUND_CONTROL_VERSION);
+	if(SSL_write(ssl, pre, (int)strlen(pre)) <= 0)
+		ssl_err("could not SSL_write");
+	for(i=0; i<argc; i++) {
+		if(SSL_write(ssl, space, (int)strlen(space)) <= 0)
+			ssl_err("could not SSL_write");
+		if(SSL_write(ssl, argv[i], (int)strlen(argv[i])) <= 0)
+			ssl_err("could not SSL_write");
+	}
+	if(SSL_write(ssl, newline, (int)strlen(newline)) <= 0)
+		ssl_err("could not SSL_write");
+
+	if(argc == 1 && strcmp(argv[0], "load_cache") == 0) {
+		send_file(ssl, stdin, buf, sizeof(buf));
+	}
+
+	while(1) {
+		ERR_clear_error();
+		if((r = SSL_read(ssl, buf, (int)sizeof(buf)-1)) <= 0) {
+			if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) {
+				/* EOF */
+				break;
+			}
+			ssl_err("could not SSL_read");
+		}
+		buf[r] = 0;
+		if(first_line && strncmp(buf, "error", 5) == 0) {
+			printf("%s", buf);
+			was_error = 1;
+		} else if (!quiet)
+			printf("%s", buf);
+
+		first_line = 0;
+	}
+	return was_error;
+}
+
+/** go ahead and read config, contact server and perform command and display */
+static int
+go(const char* cfgfile, char* svr, int quiet, int argc, char* argv[])
+{
+	struct config_file* cfg;
+	int fd, ret;
+	SSL_CTX* ctx;
+	SSL* ssl;
+
+	/* read config */
+	if(!(cfg = config_create()))
+		fatal_exit("out of memory");
+	if(!config_read(cfg, cfgfile, NULL))
+		fatal_exit("could not read config file");
+	if(!cfg->remote_control_enable)
+		log_warn("control-enable is 'no' in the config file.");
+	ctx = setup_ctx(cfg);
+	
+	/* contact server */
+	fd = contact_server(svr, cfg, argc>0&&strcmp(argv[0],"status")==0);
+	ssl = setup_ssl(ctx, fd);
+	
+	/* send command */
+	ret = go_cmd(ssl, quiet, argc, argv);
+
+	SSL_free(ssl);
+#ifndef USE_WINSOCK
+	close(fd);
+#else
+	closesocket(fd);
+#endif
+	SSL_CTX_free(ctx);
+	config_delete(cfg);
+	return ret;
+}
+
+/** getopt global, in case header files fail to declare it. */
+extern int optind;
+/** getopt global, in case header files fail to declare it. */
+extern char* optarg;
+
+/** Main routine for unbound-control */
+int main(int argc, char* argv[])
+{
+	int c, ret;
+	int quiet = 0;
+	const char* cfgfile = CONFIGFILE;
+	char* svr = NULL;
+#ifdef USE_WINSOCK
+	int r;
+	WSADATA wsa_data;
+#endif
+#ifdef USE_THREAD_DEBUG
+	/* stop the file output from unbound-control, overwites the servers */
+	extern int check_locking_order;
+	check_locking_order = 0;
+#endif /* USE_THREAD_DEBUG */
+	log_ident_set("unbound-control");
+	log_init(NULL, 0, NULL);
+	checklock_start();
+#ifdef USE_WINSOCK
+	if((r = WSAStartup(MAKEWORD(2,2), &wsa_data)) != 0)
+		fatal_exit("WSAStartup failed: %s", wsa_strerror(r));
+	/* use registry config file in preference to compiletime location */
+	if(!(cfgfile=w_lookup_reg_str("Software\\Unbound", "ConfigFile")))
+		cfgfile = CONFIGFILE;
+#endif
+
+	ERR_load_crypto_strings();
+	ERR_load_SSL_strings();
+	OpenSSL_add_all_algorithms();
+	(void)SSL_library_init();
+
+	if(!RAND_status()) {
+                /* try to seed it */
+                unsigned char buf[256];
+                unsigned int seed=(unsigned)time(NULL) ^ (unsigned)getpid();
+		unsigned int v = seed;
+                size_t i;
+                for(i=0; i<256/sizeof(v); i++) {
+                        memmove(buf+i*sizeof(v), &v, sizeof(v));
+                        v = v*seed + (unsigned int)i;
+                }
+                RAND_seed(buf, 256);
+		log_warn("no entropy, seeding openssl PRNG with time\n");
+	}
+
+	/* parse the options */
+	while( (c=getopt(argc, argv, "c:s:qh")) != -1) {
+		switch(c) {
+		case 'c':
+			cfgfile = optarg;
+			break;
+		case 's':
+			svr = optarg;
+			break;
+		case 'q':
+			quiet = 1;
+			break;
+		case '?':
+		case 'h':
+		default:
+			usage();
+		}
+	}
+	argc -= optind;
+	argv += optind;
+	if(argc == 0)
+		usage();
+	if(argc >= 1 && strcmp(argv[0], "start")==0) {
+		if(execlp("unbound", "unbound", "-c", cfgfile, 
+			(char*)NULL) < 0) {
+			fatal_exit("could not exec unbound: %s",
+				strerror(errno));
+		}
+	}
+
+	ret = go(cfgfile, svr, quiet, argc, argv);
+
+#ifdef USE_WINSOCK
+        WSACleanup();
+#endif
+	checklock_stop();
+	return ret;
+}