diff options
Diffstat (limited to 'resolv/ns_name.c')
| -rw-r--r-- | resolv/ns_name.c | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/resolv/ns_name.c b/resolv/ns_name.c index 9f7ca4a..f1a84ad 100644 --- a/resolv/ns_name.c +++ b/resolv/ns_name.c @@ -31,9 +31,6 @@ /* Forward. */ -static int dn_find(const u_char *, const u_char *, - const u_char * const *, - const u_char * const *); static int labellen(const u_char *); /* Public. */ @@ -93,118 +90,6 @@ ns_name_ntol(const u_char *src, u_char *dst, size_t dstsiz) } /*% - * Pack domain name 'domain' into 'comp_dn'. - * - * return: - *\li Size of the compressed name, or -1. - * - * notes: - *\li 'dnptrs' is an array of pointers to previous compressed names. - *\li dnptrs[0] is a pointer to the beginning of the message. The array - * ends with NULL. - *\li 'lastdnptr' is a pointer to the end of the array pointed to - * by 'dnptrs'. - * - * Side effects: - *\li The list of pointers in dnptrs is updated for labels inserted into - * the message as we compress the name. If 'dnptr' is NULL, we don't - * try to compress names. If 'lastdnptr' is NULL, we don't update the - * list. - */ -int -ns_name_pack(const u_char *src, u_char *dst, int dstsiz, - const u_char **dnptrs, const u_char **lastdnptr) -{ - u_char *dstp; - const u_char **cpp, **lpp, *eob, *msg; - const u_char *srcp; - int n, l, first = 1; - - srcp = src; - dstp = dst; - eob = dstp + dstsiz; - lpp = cpp = NULL; - if (dnptrs != NULL) { - if ((msg = *dnptrs++) != NULL) { - for (cpp = dnptrs; *cpp != NULL; cpp++) - (void)NULL; - lpp = cpp; /*%< end of list to search */ - } - } else - msg = NULL; - - /* make sure the domain we are about to add is legal */ - l = 0; - do { - int l0; - - n = *srcp; - if ((n & NS_CMPRSFLGS) == NS_CMPRSFLGS) { - __set_errno (EMSGSIZE); - return (-1); - } - if ((l0 = labellen(srcp)) < 0) { - __set_errno (EINVAL); - return(-1); - } - l += l0 + 1; - if (l > MAXCDNAME) { - __set_errno (EMSGSIZE); - return (-1); - } - srcp += l0 + 1; - } while (n != 0); - - /* from here on we need to reset compression pointer array on error */ - srcp = src; - do { - /* Look to see if we can use pointers. */ - n = *srcp; - if (n != 0 && msg != NULL) { - l = dn_find(srcp, msg, (const u_char * const *)dnptrs, - (const u_char * const *)lpp); - if (l >= 0) { - if (dstp + 1 >= eob) { - goto cleanup; - } - *dstp++ = (l >> 8) | NS_CMPRSFLGS; - *dstp++ = l % 256; - return (dstp - dst); - } - /* Not found, save it. */ - if (lastdnptr != NULL && cpp < lastdnptr - 1 && - (dstp - msg) < 0x4000 && first) { - *cpp++ = dstp; - *cpp = NULL; - first = 0; - } - } - /* copy label to buffer */ - if ((n & NS_CMPRSFLGS) == NS_CMPRSFLGS) { - /* Should not happen. */ - goto cleanup; - } - n = labellen(srcp); - if (n + 1 > eob - dstp) { - goto cleanup; - } - memcpy(dstp, srcp, n + 1); - srcp += n + 1; - dstp += n + 1; - } while (n != 0); - - if (dstp > eob) { -cleanup: - if (msg != NULL) - *lpp = NULL; - __set_errno (EMSGSIZE); - return (-1); - } - return (dstp - dst); -} -libresolv_hidden_def (ns_name_pack) - -/*% * Compress a domain name into wire format, using compression pointers. * * return: @@ -250,85 +135,6 @@ ns_name_rollback(const u_char *src, const u_char **dnptrs, /* Private. */ -/*% - * Thinking in noninternationalized USASCII (per the DNS spec), - * convert this character to lower case if it's upper case. - */ -static int -mklower(int ch) { - if (ch >= 0x41 && ch <= 0x5A) - return (ch + 0x20); - return (ch); -} - -/*% - * Search for the counted-label name in an array of compressed names. - * - * return: - *\li offset from msg if found, or -1. - * - * notes: - *\li dnptrs is the pointer to the first name on the list, - *\li not the pointer to the start of the message. - */ -static int -dn_find(const u_char *domain, const u_char *msg, - const u_char * const *dnptrs, - const u_char * const *lastdnptr) -{ - const u_char *dn, *cp, *sp; - const u_char * const *cpp; - u_int n; - - for (cpp = dnptrs; cpp < lastdnptr; cpp++) { - sp = *cpp; - /* - * terminate search on: - * root label - * compression pointer - * unusable offset - */ - while (*sp != 0 && (*sp & NS_CMPRSFLGS) == 0 && - (sp - msg) < 0x4000) { - dn = domain; - cp = sp; - while ((n = *cp++) != 0) { - /* - * check for indirection - */ - switch (n & NS_CMPRSFLGS) { - case 0: /*%< normal case, n == len */ - n = labellen(cp - 1); /*%< XXX */ - if (n != *dn++) - goto next; - - for ((void)NULL; n > 0; n--) - if (mklower(*dn++) != - mklower(*cp++)) - goto next; - /* Is next root for both ? */ - if (*dn == '\0' && *cp == '\0') - return (sp - msg); - if (*dn) - continue; - goto next; - case NS_CMPRSFLGS: /*%< indirection */ - cp = msg + (((n & 0x3f) << 8) | *cp); - break; - - default: /*%< illegal type */ - __set_errno (EMSGSIZE); - return (-1); - } - } - next: ; - sp += *sp + 1; - } - } - __set_errno (ENOENT); - return (-1); -} - /* Return the length of the encoded label starting at LP, or -1 for compression references and extended label types. */ static int |