diff options
Diffstat (limited to 'contrib/bind/doc/notes/db_names.c')
| -rw-r--r-- | contrib/bind/doc/notes/db_names.c | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/contrib/bind/doc/notes/db_names.c b/contrib/bind/doc/notes/db_names.c deleted file mode 100644 index 0b4e62c..0000000 --- a/contrib/bind/doc/notes/db_names.c +++ /dev/null @@ -1,184 +0,0 @@ -/* - * Copyright (c) 1996,1999 by 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 <sys/types.h> -#include <sys/param.h> -#include <netinet/in.h> -#include <arpa/nameser.h> - -#include <ctype.h> -#include <errno.h> -#include <resolv.h> -#include <stdio.h> - -#include "named.h" -#include "tree.h" - -struct node { - struct node *parent; /* NULL for "."'s node. */ - tree *children; /* Nodes using us as parent. */ - /*void *userdata;*/ /* For future use. */ - char name[sizeof(void*)]; /* Open array. */ -}; - -static struct node rootNode; - -static int -nodeCompare(t1, t2) - const tree_t t1, t2; -{ - const char *n1 = ((struct node *)t1)->name + sizeof(u_char), - *n2 = ((struct node *)t2)->name + sizeof(u_char); - - return (strcasecmp(n1, n2)); -} - -/* void * - * db_findname(const char *name, int storeflag) - * find or store a presentation format domain name. - * returns: - * NULL if an error occurred (check errno) - * else, node's unique, opaque address. - */ -void * -db_findname(name, storeflag) - const char *name; - int storeflag; -{ - struct node *node, *tnode; - const char *tname; - size_t len; - int ch; - - /* The root domain has its own static node. */ - if (name[0] == '\0') - return (&rootNode); - - /* Locate the end of the first label. */ - for (tname = name; (ch = *tname) != '\0'; tname++) { - /* Is this the end of the first label? */ - if (ch == '.') - break; - /* Is it an escaped character? */ - if (ch == '\\') { - ch = *++tname; - if (ch == '\0') - break; - } - } - - /* Make sure the label's length will fit in our length byte. */ - len = tname - name; - if (len > 255) { - errno = ENAMETOOLONG; - return (NULL); - } - - /* If nothing but unescaped dots after this, elide them. */ - while (ch == '.') - ch = *tname++; - - /* - * Make a new node since the comparison function needs it - * and we may yet end up adding it to our parent's tree. - * - * Note that by recursing for tnode->parent, we might be - * creating our parents and grandparents and so on. - */ - tnode = (struct node *)malloc(sizeof(struct node) - sizeof(void *) - + sizeof(u_char) + len + sizeof(char)); - tnode->parent = db_findname(tname); - tnode->children = NULL; - *((u_char *)tnode->name) = (u_char)len; - memcpy(tnode->name + sizeof(u_char), name, len); - tnode->name[sizeof(u_char) + len] = '\0'; - - /* If our first label isn't in our parent's tree, put it there. */ - node = tree_srch(&tnode->parent->children, nodeCompare, (tree_t)tnode); - if (node == NULL) - if (storeflag) - if (tree_add(&tnode->parent->children, nodeCompare, - (tree_t)tnode, NULL)) - node = tnode, tnode = NULL; - else - errno = ENOMEM; - else - errno = ENOENT; - - /* Get rid of tnode if we didn't consume it. */ - if (tnode != NULL) - free(tnode); - - /* Return the (possibly new) node, or NULL, as appropriate. */ - return (node); -} - -/* int - * db_getname(void *node, char *name, size_t size) - * given a node's unique, opaque address, format its name. - * returns: - * -1 = error occurred, check errno - * 0 = success - */ -int -db_getname(vnode, name, size) - const void *vnode; - char *name; - size_t size; -{ - const struct node *node = vnode; - - while (node != NULL) { - size_t len = (size_t)node->name[0]; - - if (size < len + 1) - goto too_long; - memcpy(name, node->name + sizeof(u_char), len); - name += len; - *name++ = '.'; - size -= len + sizeof(char); - node = node->parent; - } - - if (size < sizeof(char)) { - too_long: - errno = ENAMETOOLONG; - return (-1); - } - *name = '\0'; - return (0); -} - -/* - * char * - * db_makename(void *node) - * given a node's unique, opaque address, format and return its name. - * returns: - * pointer to the name or NULL on errors (check errno). - * notes: - * returns pointer to a static buffer, be careful how you call it. - */ -char * -db_makename(vnode) - void *vnode; -{ - static char name[MAXDNAME*2]; - - if (db_getname(vnode, name, sizeof name) < 0) - return (NULL); - return (name); -} |
