bin/tests/rbt_test.c

	rbt_test.c revision 1adfd0a9119434de35e1a6b6ddc65b28dd608308
/*
 * Copyright (C) 1999  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 */

#include <config.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include <isc/boolean.h>

#include <dns/rbt.h>
#include <dns/fixedname.h>

char *progname;
isc_mem_t *mctx;

#define DNSNAMELEN 255

static dns_name_t *
create_name(char *s) {
    int length;
    isc_result_t result;
    isc_buffer_t source, target;
    static dns_name_t *name;

    if (s == NULL || *s == '\0') {
        printf("missing name argument\n");
        return (NULL);
    }

    length = strlen(s);

    isc_buffer_init(&source, s, length, ISC_BUFFERTYPE_TEXT);
    isc_buffer_add(&source, length);

    /*
     * It isn't really necessary in this program to create individual
     * memory spaces for each name structure and its associate character
     * string.  It is done in this program to provide a relatively
     * easy way to test the callback from dns_rbt_deletename that is
     * supposed to free the data associated with a node.
     *
     * The buffer for the actual name will immediately follow the
     * name structure.
     */
    name = isc_mem_get(mctx, sizeof(*name) + DNSNAMELEN);
    if (name == NULL) {
        printf("out of memory!\n");
        return (NULL);
    }

    dns_name_init(name, NULL);
    isc_buffer_init(&target, name + 1, DNSNAMELEN, ISC_BUFFERTYPE_BINARY);

    result = dns_name_fromtext(name, &source, dns_rootname,
                   ISC_FALSE, &target);

    if (result != DNS_R_SUCCESS) {
        printf("dns_name_fromtext(%s) failed: %s\n",
               s, dns_result_totext(result));
        return (NULL);
    }

    return (name);
}

static void
delete_name(void *data, void *arg) {
    dns_name_t *name;

    (void)arg;
    name = data;
    isc_mem_put(mctx, data, sizeof(dns_name_t) + DNSNAMELEN);
}

static void
print_name(dns_name_t *name) {
    isc_buffer_t target;
    char *buffer[256];

    isc_buffer_init(&target, buffer, sizeof(buffer), ISC_BUFFERTYPE_TEXT);

    /*
     * ISC_FALSE means absolute names have the final dot added.
     */
    dns_name_totext(name, ISC_FALSE, &target);

    printf("%.*s", (int)target.used, (char *)target.base);
}

static void
iterate(dns_rbt_t *rbt, isc_boolean_t forward) {
    dns_name_t *foundname, *origin;
    dns_rbtnodechain_t chain;
    dns_fixedname_t fixedfoundname, fixedorigin;
    dns_result_t result;
    dns_result_t (*move)(dns_rbtnodechain_t *chain, dns_name_t *name,
                 dns_name_t *origin);

    dns_rbtnodechain_init(&chain, mctx);

    dns_fixedname_init(&fixedfoundname);
    dns_fixedname_init(&fixedorigin);
    foundname = dns_fixedname_name(&fixedfoundname);
    origin    = dns_fixedname_name(&fixedorigin);

    if (forward) {
        printf("iterating forward\n" );
        move = dns_rbtnodechain_next;

        result = dns_rbtnodechain_first(&chain, rbt, foundname, origin);

    } else {
        printf("iterating backward\n" );
        move = dns_rbtnodechain_prev;

        result = dns_rbtnodechain_last(&chain, rbt, foundname, origin);

    }

    if (result != DNS_R_SUCCESS && result != DNS_R_NEWORIGIN)
        printf("start not found!\n");

    else {
        while (1) {
            if (result == DNS_R_NEWORIGIN) {
                printf("  new origin: ");
                print_name(origin);
                printf("\n");
            }

            if (result == DNS_R_SUCCESS ||
                result == DNS_R_NEWORIGIN) {
                print_name(foundname);
                printf("\n");

            } else {
                if (result != DNS_R_NOMORE)
                       printf("UNEXEPCTED ITERATION ERROR: %s",
                          dns_result_totext(result));
                break;
            }

            result = move(&chain, foundname, origin);
        }
    }
}


#define CMDCHECK(s) (strncasecmp(command, (s), length) == 0)
#define PRINTERR(r) if (r != DNS_R_SUCCESS) \
                printf("... %s\n", dns_result_totext(r));

void
main (int argc, char **argv) {
    char *command, *arg, *whitespace, buffer[1024];
    dns_name_t *name, *foundname;
    dns_fixedname_t fixedname;
    dns_rbt_t *rbt;
    int length, ch;
    isc_boolean_t show_final_mem = ISC_FALSE;
    isc_result_t result;
    void *data;

    progname = strrchr(*argv, '/');
    if (progname != NULL)
        progname++;
    else
        progname = *argv;

    while ((ch = getopt(argc, argv, "m")) != -1) {
        switch (ch) {
        case 'm':
            show_final_mem = ISC_TRUE;
            break;
        }
    }

    argc -= optind;
    argv += optind;

    if (argc > 1) {
        printf("Usage: %s [-m]\n", progname);
        exit(1);
    }

    setbuf(stdout, NULL);

    result = isc_mem_create(0, 0, &mctx);
    if (result != ISC_R_SUCCESS) {
        printf("isc_mem_create: %s: exiting\n",
               dns_result_totext(result));
        exit(1);
    }

    result = dns_rbt_create(mctx, delete_name, NULL, &rbt);
    if (result != DNS_R_SUCCESS) {
        printf("dns_rbt_create: %s: exiting\n",
               dns_result_totext(result));
        exit(1);
    }

    whitespace = " \t";

    while (fgets(buffer, sizeof(buffer), stdin) != NULL) {
        length = strlen(buffer);

        if (buffer[length - 1] != '\n') {
            printf("line to long (%d max), ignored\n",
                   sizeof(buffer) - 2);
            continue;
        }

        buffer[length - 1] = '\0';

        command = buffer + strspn(buffer, whitespace);
        arg = strpbrk(command, whitespace);
        if (arg != NULL) {
            *arg++ = '\0';
            arg += strspn(arg, whitespace);
        }

        length = strlen(command);
        if (*command != '\0') {
            if (CMDCHECK("add")) {
                name = create_name(arg);
                if (name != NULL) {
                    printf("adding name %s\n", arg);
                    result = dns_rbt_addname(rbt,
                                 name, name);
                    PRINTERR(result);
                }

            } else if (CMDCHECK("delete")) {
                name = create_name(arg);
                if (name != NULL) {
                    printf("deleting name %s\n", arg);
                    result = dns_rbt_deletename(rbt, name,
                                    ISC_FALSE);
                    PRINTERR(result);
                    delete_name(name, NULL);
                }

            } else if (CMDCHECK("nuke")) {
                name = create_name(arg);
                if (name != NULL) {
                    printf("deleting name %s\n", arg);
                    result = dns_rbt_deletename(rbt, name,
                                    ISC_TRUE);
                    PRINTERR(result);
                    delete_name(name, NULL);
                }

            } else if (CMDCHECK("search")) {
                name = create_name(arg);
                if (name != NULL) {
                    printf("searching for name %s ... ",
                           arg);

                    dns_fixedname_init(&fixedname);
                    foundname =
                        dns_fixedname_name(&fixedname);
                    data = NULL;

                    result = dns_rbt_findname(rbt, name,
                                  foundname,
                                  &data);
                    switch (result) {
                    case DNS_R_SUCCESS:
                        printf("found exact: ");
                        print_name(data);
                        putchar('\n');
                        break;
                    case DNS_R_PARTIALMATCH:
                        printf("found parent: ");
                        print_name(data);
                        printf("\n\t(foundname: ");
                        print_name(foundname);
                        printf(")\n");

                        break;
                    case DNS_R_NOTFOUND:
                        printf("NOT FOUND!\n");
                        break;
                    case DNS_R_NOMEMORY:
                        printf("OUT OF MEMORY!\n");
                        break;
                    default:
                        printf("UNEXPECTED RESULT\n");
                    }

                    delete_name(name, NULL);
                }

            } else if (CMDCHECK("forward")) {
                iterate(rbt, ISC_TRUE);

            } else if (CMDCHECK("backward")) {
                iterate(rbt, ISC_FALSE);

            } else if (CMDCHECK("print")) {
                if (arg == NULL || *arg == '\0')
                    dns_rbt_printall(rbt);
                else
                    printf("usage: print\n");

            } else if (CMDCHECK("quit")) {
                if (arg == NULL || *arg == '\0')
                    break;
                else
                    printf("usage: quit\n");
            } else {
                printf("a(dd) NAME, d(elete) NAME, "
                       "s(earch) NAME, p(rint), or q(uit)\n");

            }
        }

    }

    dns_rbt_destroy(&rbt);

    if (show_final_mem)
        isc_mem_stats(mctx, stderr);

    exit(0);
}