SIGNIT_OBJ=$(addprefix $(BUILD),$(SIGNIT_SRC:.c=.o)) $(COMPAT_OBJ)
MEMSTATS_SRC=testcode/memstats.c checkconf/worker_cb.c $(COMMON_SRC)
MEMSTATS_OBJ=$(addprefix $(BUILD),$(MEMSTATS_SRC:.c=.o)) $(COMPAT_OBJ)
+LIBUNBOUND_SRC=$(patsubst $(srcdir)/%,%, \
+ $(wildcard $(srcdir)/libunbound/*.c) $(COMMON_SRC))
+LIBUNBOUND_OBJ=$(addprefix $(BUILD),$(LIBUNBOUND_SRC:.c=.o)) $(COMPAT_OBJ)
ALL_SRC=$(COMMON_SRC) $(UNITTEST_SRC) $(DAEMON_SRC) \
$(TESTBOUND_SRC) $(LOCKVERIFY_SRC) $(PKTVIEW_SRC) $(SIGNIT_SRC) \
- $(MEMSTATS_SRC) $(CHECKCONF_SRC)
+ $(MEMSTATS_SRC) $(CHECKCONF_SRC) $(LIBUNBOUND_SRC)
ALL_OBJ=$(addprefix $(BUILD),$(ALL_SRC:.c=.o) \
$(addprefix compat/,$(LIBOBJS))) $(COMPAT_OBJ)
COMPILE=$(LIBTOOL) --tag=CC --mode=compile $(CC) $(CPPFLAGS) $(CFLAGS)
LINK=$(LIBTOOL) --tag=CC --mode=link $(CC) $(staticexe) $(RUNTIME_PATH) $(CFLAGS) $(LDFLAGS)
-LINK_LIB=$(LIBTOOL) --tag=CC --mode=link $(CC) $(CFLAGS) $(LDFLAGS) -release $(VERSION)
+LINK_LIB=$(LIBTOOL) --tag=CC --mode=link $(CC) $(CFLAGS) $(LDFLAGS) $(staticexe) -release $(VERSION) -no-undefined
-.PHONY: clean realclean doc lint all install uninstall tests test download_ldns strip
+.PHONY: clean realclean doc lint all install uninstall tests test download_ldns strip lib
$(BUILD)%.o: $(srcdir)/%.c
$(INFO) Build $<
@if test ! -d $(dir $@); then $(INSTALL) -d $(patsubst %/,%,$(dir $@)); fi
$Q$(COMPILE) -c $< -o $@
-all: $(COMMON_OBJ) unbound unbound-checkconf
+all: $(COMMON_OBJ) unbound unbound-checkconf lib
tests: all unittest testbound lock-verify pktview signit memstats
test: tests
bash testcode/do-tests.sh
+lib: libunbound.la
+
+libunbound.la: $(LIBUNBOUND_OBJ)
+ $(INFO) Link $@
+ $Q$(LINK_LIB) --export-symbols $(srcdir)/libunbound/ubsyms.def -o $@ $(sort $(LIBUNBOUND_OBJ:.o=.lo)) -rpath $(libdir) $(RUNTIME_PATH)
+
ifeq ($(patsubst ldns-src%,ldns-src,$(ldnsdir)),ldns-src)
ldnslib=$(ldnsdir)/lib/libldns.a
$(ldnslib):
$(INSTALL) -d $(mandir)
$(INSTALL) -d $(mandir)/man8
$(INSTALL) -d $(mandir)/man5
+ $(INSTALL) -m 755 -d $(libdir)
$(LIBTOOL) --mode=install cp unbound $(bindir)/unbound
$(LIBTOOL) --mode=install cp unbound-checkconf $(bindir)/unbound-checkconf
$(INSTALL) -c -m 644 $(srcdir)/doc/unbound.8 $(mandir)/man8
$(INSTALL) -c -m 644 $(srcdir)/doc/unbound-checkconf.8 $(mandir)/man8
$(INSTALL) -c -m 644 $(srcdir)/doc/unbound.conf.5 $(mandir)/man5
if test ! -e $(configfile); then $(INSTALL) -d `dirname $(configfile)`; $(INSTALL) -c -m 644 $(srcdir)/doc/example.conf $(configfile); fi
+ $(LIBTOOL) --mode=install cp libunbound.la $(libdir)
+ $(LIBTOOL) --mode=finish $(libdir)
uninstall:
rm -f -- $(bindir)/unbound $(bindir)/unbound-checkconf
rm -f -- $(mandir)/man8/unbound.8 $(mandir)/man8/unbound-checkconf.8 $(mandir)/man5/unbound.conf.5
+ $(LIBTOOL) --mode=uninstall rm -f $(libdir)/libunbound.la
@echo
@echo "You still need to remove `dirname $(configfile)` , $(configfile) by hand"
--- /dev/null
+/*
+ * unbound.c - unbound validating resolver public API implementation
+ *
+ * Copyright (c) 2007, 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 REGENTS 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
+ *
+ * This file contains functions to resolve DNS queries and
+ * validate the answers. Synchonously and asynchronously.
+ *
+ */
+
+/* include the public api first, it should be able to stand alone */
+#include "libunbound/unbound.h"
+#include "config.h"
+#include "util/locks.h"
+#include "util/config_file.h"
+#include "util/alloc.h"
+
+/**
+ * The context structure
+ *
+ * Contains two pipes for async service
+ * qq : write queries to the async service pid/tid.
+ * rr : read results from the async service pid/tid.
+ */
+struct ub_val_ctx {
+ /** mutex on query write pipe */
+ lock_basic_t qqpipe_lock;
+ /** the query write pipe, [0] read from, [1] write on */
+ int qqpipe[2];
+ /** mutex on result read pipe */
+ lock_basic_t rrpipe_lock;
+ /** the result read pipe, [0] read from, [1] write on */
+ int rrpipe[2];
+
+ /** configuration options */
+ struct config_file* cfg;
+ /** do threading (instead of forking) */
+ int dothread;
+
+ /** shared caches, and so on */
+ struct alloc_cache superalloc;
+ /** module env master value */
+ struct module_env* env;
+ /** number of modules active, ids from 0 to num-1. */
+ int num_modules;
+ /** the module callbacks, array of num_modules length */
+ struct module_func_block** modfunc;
+ /** local authority zones */
+ struct local_zones* local_zones;
+
+ /** TODO list of outstanding queries */
+};
+
+/**
+ * The error constants
+ */
+enum ub_ctx_err {
+ /** no error */
+ UB_NOERROR = 0,
+ /** alloc failure */
+ UB_NOMEM,
+ /** socket operation */
+ UB_SOCKET,
+ /** syntax error */
+ UB_SYNTAX,
+ /** DNS service failed */
+ UB_SERVFAIL
+};
+
+
+struct ub_val_ctx*
+ub_val_ctx_create()
+{
+ struct ub_val_ctx* ctx = (struct ub_val_ctx*)calloc(1, sizeof(*ctx));
+ if(!ctx) {
+ errno = ENOMEM;
+ return NULL;
+ }
+ if(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx->qqpipe) == -1) {
+ free(ctx);
+ return NULL;
+ }
+ if(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx->rrpipe) == -1) {
+ int e = errno;
+ close(ctx->qqpipe[0]);
+ close(ctx->qqpipe[1]);
+ free(ctx);
+ errno = e;
+ return NULL;
+ }
+ lock_basic_init(&ctx->qqpipe_lock);
+ lock_basic_init(&ctx->rrpipe_lock);
+ ctx->cfg = config_create();
+ if(!ctx->cfg) {
+ ub_val_ctx_delete(ctx);
+ errno = ENOMEM;
+ return NULL;
+ }
+ return ctx;
+}
+
+void
+ub_val_ctx_delete(struct ub_val_ctx* ctx)
+{
+ if(!ctx) return;
+ lock_basic_destroy(&ctx->qqpipe_lock);
+ lock_basic_destroy(&ctx->rrpipe_lock);
+ close(ctx->qqpipe[0]);
+ close(ctx->qqpipe[1]);
+ close(ctx->rrpipe[0]);
+ close(ctx->rrpipe[1]);
+ config_delete(ctx->cfg);
+ free(ctx);
+}
+
+int
+ub_val_ctx_config(struct ub_val_ctx* ctx, char* fname)
+{
+ if(!config_read(ctx->cfg, fname)) {
+ return UB_SYNTAX;
+ }
+ return UB_NOERROR;
+}
+
+int
+ub_val_ctx_add_ta(struct ub_val_ctx* ctx, char* ta)
+{
+ char* dup = strdup(ta);
+ if(!dup) return UB_NOMEM;
+ if(!cfg_strlist_insert(&ctx->cfg->trust_anchor_list, dup)) {
+ free(dup);
+ return UB_NOMEM;
+ }
+ return UB_NOERROR;
+}
+
+int
+ub_val_ctx_trustedkeys(struct ub_val_ctx* ctx, char* fname)
+{
+ char* dup = strdup(fname);
+ if(!dup) return UB_NOMEM;
+ if(!cfg_strlist_insert(&ctx->cfg->trusted_keys_file_list, dup)) {
+ free(dup);
+ return UB_NOMEM;
+ }
+ return UB_NOERROR;
+}
+
+int
+ub_val_ctx_async(struct ub_val_ctx* ctx, int dothread)
+{
+ ctx->dothread = dothread;
+ return UB_NOERROR;
+}
+
+static int
+pollit(struct ub_val_ctx* ctx, struct timeval* t)
+{
+ fd_set r;
+ FD_ZERO(&r);
+ FD_SET(ctx->rrpipe[0], &r);
+ if(select(ctx->rrpipe[0]+1, &r, NULL, NULL, t) == -1) {
+ return 0;
+ }
+ errno = 0;
+ return FD_ISSET(ctx->rrpipe[0], &r);
+}
+
+int
+ub_val_ctx_poll(struct ub_val_ctx* ctx)
+{
+ struct timeval t;
+ memset(&t, 0, sizeof(t));
+ return pollit(ctx, &t);
+}
+
+int
+ub_val_ctx_wait(struct ub_val_ctx* ctx)
+{
+ /* TODO until no more queries outstanding */
+ while(1) {
+ (void)pollit(ctx, NULL);
+ ub_val_ctx_process(ctx);
+ }
+ return UB_NOERROR;
+}
+
+int
+ub_val_ctx_fd(struct ub_val_ctx* ctx)
+{
+ return ctx->rrpipe[0];
+}
+
+int
+ub_val_ctx_process(struct ub_val_ctx* ctx)
+{
+ return UB_NOERROR;
+}
+
+int
+ub_val_resolve(struct ub_val_ctx* ctx, char* name, int rrtype,
+ int rrclass, int* secure, int* data, struct ub_val_result** result)
+{
+ /* become a resolver thread for a bit */
+
+ return UB_NOERROR;
+}
+
+int
+ub_val_resolve_async(struct ub_val_ctx* ctx, char* name, int rrtype,
+ int rrclass, void* mydata, ub_val_callback_t callback, int* async_id)
+{
+ return UB_NOERROR;
+}
+
+int
+ub_val_cancel(struct ub_val_ctx* ctx, int async_id)
+{
+ return UB_NOERROR;
+}
+
+void
+ub_val_result_free(struct ub_val_result* result)
+{
+ char** p;
+ if(!result) return;
+ free(result->qname);
+ free(result->canonname);
+ for(p = result->data; *p; p++)
+ free(*p);
+ free(result->data);
+ free(result->len);
+ free(result);
+}
+
+const char*
+ub_val_strerror(int err)
+{
+ switch(err) {
+ case UB_NOERROR: return "no error";
+ case UB_NOMEM: return "out of memory";
+ case UB_SOCKET: return "socket io error";
+ case UB_SYNTAX: return "syntax error";
+ case UB_SERVFAIL: return "server failure";
+ default: return "unknown error";
+ }
+}
*
* This file contains functions to resolve DNS queries and
* validate the answers. Synchonously and asynchronously.
+ *
+ * Several ways to use this interface from an application wishing
+ * to perform (validated) DNS lookups.
+ *
+ * All start with
+ * ctx = ub_val_ctx_create();
+ * err = ub_val_ctx_add_ta(ctx, "...");
+ * err = ub_val_ctx_add_ta(ctx, "...");
+ * ... some lookups
+ * ... call ub_val_ctx_delete(ctx); when you want to stop.
+ *
+ * Application not threaded. Blocking.
+ * int err = ub_val_resolve(ctx, "www.example.com", ...
+ * if(err) fprintf(stderr, "lookup error: %s\n", ub_val_strerror(err));
+ * ... use the answer
+ *
+ * Application not threaded. Non-blocking ('asynchronous').
+ * err = ub_val_resolve_async(ctx, "www.example.com", ... my_callback);
+ * ... application resumes processing ...
+ * ... and when either ub_val_ctx_poll(ctx) is true
+ * ... or when the file descriptor ub_val_ctx_fd(ctx) is readable,
+ * ... or whenever, the app calls ...
+ * ub_val_ctx_process(ctx);
+ * ... if no result is ready, the app resumes processing above,
+ * ... or process() calls my_callback() with results.
+ *
+ * ... if the application has nothing more to do, wait for answer
+ * ub_val_ctx_wait(ctx);
+ *
+ * Application threaded. Blocking.
+ * Blocking, same as above. The current thread does the work.
+ * Multiple threads can use the *same context*, each does work and uses
+ * shared cache data from the context.
+ *
+ * Application threaded. Non-blocking ('asynchronous').
+ * err = ub_val_ctx_async(ctx, 1);
+ * ... same as async for non-threaded
+ * ... the callbacks are called in the thread that calls process(ctx)
+ *
+ * If not threading is compiled in, the above async example uses fork(2) to
+ * create a process to perform the work. The forked process exits when the
+ * calling process exits, or ctx_delete() is called.
+ * Otherwise, for asynchronous with threading, a worker thread is created.
+ *
+ * The blocking calls use shared ctx-cache when threaded. Thus
+ * ub_val_resolve() and ub_val_resolve_async() && ub_val_ctx_wait() are
+ * not the same. The first makes the current thread do the work, setting
+ * up buffers, etc, to perform its thing (but using shared cache data).
+ * The second calls another worker thread (or process) to perform the work.
+ * And no buffers need to be setup, but a context-switch happens.
*/
-#ifdef _UB_UNBOUND_H
+#ifndef _UB_UNBOUND_H
#define _UB_UNBOUND_H
+#include <stdlib.h>
/**
* The validation context is created to hold the resolver status,
* with ub_val_result_free().
*/
struct ub_val_result {
- /** a list of network order DNS rdata items, terminated with a
+ /** The original question, name text string. */
+ char* qname;
+ /** the type asked for */
+ int qtype;
+ /** the class asked for */
+ int qclass;
+
+ /**
+ * a list of network order DNS rdata items, terminated with a
* NULL pointer, so that data[0] is the first result entry,
- * data[1] the second, and the last entry is NULL. */
+ * data[1] the second, and the last entry is NULL.
+ * If there was no data, data[0] is NULL.
+ */
char** data;
- /** the length in bytes of the data items */
+
+ /** the length in bytes of the data items, len[i] for data[i] */
size_t* len;
+
+ /**
+ * canonical name for the result (the final cname).
+ * zero terminated string.
+ * May be NULL if no canonical name exists.
+ */
+ char* canonname;
+
+ /**
+ * If there was no data, and the domain did not exist, this is true.
+ * If it is false, and there was no data, then the domain name
+ * is purported to exist, but the requested data type is not available.
+ */
+ int nxdomain;
+
+ /**
+ * If the result was not secure (secure==0), and this result is due
+ * to a security failure, bogus is true.
+ * This means the data has been actively tampered with, signatures
+ * failed, expected signatures were not present, timestamps on
+ * signatures were out of date and so on.
+ *
+ * If !secure and !bogus, this can happen if the data is not secure
+ * because security is disabled for that domain name.
+ * This means the data is from a domain where data is not signed.
+ */
+ int bogus;
};
+/**
+ * Callback for results of async queries.
+ * The readable function definition looks like:
+ * void my_callback(void* my_arg, int err, int secure, int havedata,
+ * struct ub_val_result* result);
+ * It is called with
+ * my_arg: your pointer to a (struct of) data of your choice, or NULL.
+ * err: if 0 all is OK, otherwise an error occured and no results
+ * are forthcoming.
+ * secure: if true, the result is validated securely.
+ * havedata: if true, there was data, false if no data.
+ * result: pointer to more detailed result structure.
+ * This structure is allocated on the heap and needs to be
+ * freed with ub_val_result_free(result);
+ */
+typedef void (*ub_val_callback_t)(void*, int, int, int, struct ub_val_result*);
+
/**
* Create a resolving and validation context.
* @return a new context. default initialisation.
- * returns NULL on error (malloc failure).
+ * returns NULL on error.
*/
struct ub_val_ctx* ub_val_ctx_create();
/**
* Destroy a validation context and free all its resources.
+ * Outstanding async queries are killed and callbacks are not called for them.
* @param ctx: context to delete.
*/
void ub_val_ctx_delete(struct ub_val_ctx* ctx);
* The trust anchor is a string, on one line, that holds a valid DNSKEY or
* DS RR.
* @param ctx: context.
+ * At this time it is only possible to add trusted keys before the
+ * first resolve is done.
* @param ta: string, with zone-format RR on one line.
* <domainname> <TTL optional> <type> <class optional> <rdata contents>
* @return 0 if OK, else error.
* Add trust anchors to the given context.
* The trust anchor the name of a bind-style config file with trusted-keys{}.
* @param ctx: context.
+ * At this time it is only possible to add trusted keys before the
+ * first resolve is done.
* @param fname: filename of file with bind-style config entries with trust
* anchors.
* @return 0 if OK, else error.
int ub_val_ctx_trustedkeys(struct ub_val_ctx* ctx, char* fname);
/**
- * Set a context to be synchronous or asynchronous.
+ * Set a context behaviour for asynchronous action.
* @param ctx: context.
- * @param async: set false if it should be synchronous (waiting) or
- * true if it should be asynchronous (resolving and validating in the
- * background).
+ * @param dothread: if true, enables threading and a call to resolve_async()
+ * creates a thread to handle work in the background.
+ * If false, a process is forked to handle work in the background.
+ * Changes to this setting after async() calls have been made have
+ * no effect (delete and re-create the context to change).
* @return 0 if OK, else error.
*/
-int ub_val_ctx_async(struct ub_val_ctx* ctx, int async);
+int ub_val_ctx_async(struct ub_val_ctx* ctx, int dothread);
/**
* Poll a context to see if it has any new results
* Do not poll in a loop, instead extract the fd below to poll for readiness,
* and then check, or wait using the wait routine.
- * @param ctx: asynchronous context.
+ * @param ctx: context.
* @return: 0 if nothing to read, or nonzero if a result is available.
* If nonzero, call ctx_process() to get do any callbacks.
*/
/**
* Wait for a context to finish with results. Calls ctx_process() after
* the wait for you. After the wait, there are no more outstanding queries.
- * @param ctx: asynchronous context.
+ * @param ctx: context.
* @return: 0 if OK, else error.
*/
int ub_val_ctx_wait(struct ub_val_ctx* ctx);
* Get file descriptor. Wait for it to become readable, at this point
* answers are returned from the asynchronous validating resolver.
* Then call the ub_val_ctx_process to continue processing.
- * @param ctx: asynchronous context.
+ * This routine works immediately after context creation, the fd
+ * does not change.
+ * @param ctx: context.
* @return: -1 on error, or file descriptor to use select(2) with.
*/
int ub_val_ctx_fd(struct ub_val_ctx* ctx);
* Call this routine to continue processing results from the validating
* resolver (when the fd becomes readable).
* Will perform necessary callbacks.
- * @param ctx: context, asynchronous
+ * @param ctx: context
* @return: 0 if OK, else error.
*/
int ub_val_ctx_process(struct ub_val_ctx* ctx);
/**
* Perform resolution and validation of the target name.
* @param ctx: context.
- * @param name: domain name in text format (a string).
- * @param rrtype: type of RR in host order, 1 is A.
+ * @param name: domain name in text format (a zero terminated text string).
+ * @param rrtype: type of RR in host order, 1 is A (address).
* @param rrclass: class of RR in host order, 1 is IN (for internet).
* @param secure: returns true if the answer validated securely.
* false if not.
+ * It is possible to get a result with no data (data is false),
+ * and secure is true. This means that the non-existance of the data
+ * was cryptographically proven (with signatures).
* @param data: returns false if there was no data, or the domain did not exist,
* else true.
* @param result: the result data is returned in a newly allocated result
* @return 0 if OK, else error.
*/
int ub_val_resolve(struct ub_val_ctx* ctx, char* name, int rrtype,
- int rrclass, int* secure, int* data, struct ub_val_result** data);
+ int rrclass, int* secure, int* data, struct ub_val_result** result);
/**
* Perform resolution and validation of the target name.
* Asynchronous, after a while, the callback will be called with your
* data and the result + secure status.
- * @param ctx: context, asynchronous.
+ * @param ctx: context.
+ * If no thread or process has been created yet to perform the
+ * work in the background, it is created now.
* @param name: domain name in text format (a string).
* @param rrtype: type of RR in host order, 1 is A.
* @param rrclass: class of RR in host order, 1 is IN (for internet).
* and is passed on to the callback function.
* @param callback: this is called on completion of the resolution.
* It is called as:
- * void callback(void* mydata, int secure, int data,
+ * void callback(void* mydata, int err, int secure, int havedata,
* struct ub_val_result* result)
* with mydata, the same as passed here,
+ * with err is 0 when a result has been found.
* with secure true if the answer validated securely.
- * with data true if any data was found.
+ * with havedata true if any data was found.
* with result newly allocated result structure.
- * TODO return errors in async case.
+ *
+ * If an error happens during processing, your callback will be called
+ * with error set to a nonzero value (and secure=0, data=0, result=0).
+ * @param async_id: if you pass a non-NULL value, an identifier number is
+ * returned for the query as it is in progress. It can be used to
+ * cancel the query.
* @return 0 if OK, else error.
*/
int ub_val_resolve_async(struct ub_val_ctx* ctx, char* name, int rrtype,
- int rrclass, void* mydata, void (*callback)(void*, int, int,
- struct ub_val_result*));
+ int rrclass, void* mydata, ub_val_callback_t callback, int* async_id);
+
+/**
+ * Cancel an async query in progress.
+ * Its callback will not be called.
+ *
+ * @param ctx: context.
+ * @return 0 if OK, else error.
+ */
+int ub_val_cancel(struct ub_val_ctx* ctx, int async_id);
/* function to get dns result message in its entirety (a buf) */
/* convenience function to get A */
/* convenience to get PTR */
/* convenience to get 'addrinfo', A, AAAA, canonname */
-/* neat error; with errnumber to string conversion. the enum is hidden. */
+/**
+ * Free storage associated with a result structure.
+ * @param result: to free
+ */
+void ub_val_result_free(struct ub_val_result* result);
-/* more detail function. with lots of information */
+/**
+ * Convert error value to a human readable string.
+ * @param err: error code from one of the ub_val* functions.
+ * @return pointer to constant text string, zero terminated.
+ */
+const char* ub_val_strerror(int err);
#endif /* _UB_UNBOUND_H */
projects / thirdparty / unbound.git / commitdiff
