diff options
| -rw-r--r-- | ChangeLog | 13 | ||||
| -rw-r--r-- | NEWS | 5 | ||||
| -rw-r--r-- | resolv/ns_name.c | 256 | ||||
| -rw-r--r-- | resolv/nss_dns/dns-host.c | 14 | ||||
| -rw-r--r-- | resolv/res_debug.c | 1 | ||||
| -rw-r--r-- | resolv/res_init.c | 1 | ||||
| -rw-r--r-- | resolv/resolv.h | 2 |
7 files changed, 26 insertions, 266 deletions
@@ -1,5 +1,18 @@ 2016-10-07 Florian Weimer <fweimer@redhat.com> + [BZ #20629] + resolv: Remove RES_USEBSTRING and its implementation. + * resolv/resolv.h (RES_USEBSTRING): Remove. + * resolv/ns_name.c (NS_TYPE_ELT, DNS_LABELTYPE_BITSTRING) + (digitvalue, encode_bitstring, decode_bitstring): Remove. + (ns_name_ntop, ns_name_pton, ns_name_unpack, ns_name_skip) + (labellen): Remove extended label types support. + * resolv/res_debug.c (p_option): Remove RES_USEBSTRING handling. + * resolv/res_init.c (res_setoptions): Likewise. + * resolv/nss_dns/dns-host.c (_nss_dns_gethostbyaddr2_r): Likewise. + +2016-10-07 Florian Weimer <fweimer@redhat.com> + resolv: Remove RES_NOIP6DOTINT and its implementation. * resolv/resolv.h (RES_DEFAULT): Remove RES_NOIP6DOTINT. (RES_NOIP6DOTINT): Remove. @@ -64,6 +64,11 @@ Version 2.25 “no-ip6-dotint” had already been the default, and support for the “ip6-dotint” option was removed from the Internet in 2006. +* The "ip6-bytestring" resolver option and the corresponding RES_NOIP6DOTINT + flag from <resolv.h> have been removed. The option relied on a + backwards-incompatible DNS extension which was never deployed on the + Internet. + * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG defined in the <resolv.h> header file have been deprecated. They were already unimplemented. diff --git a/resolv/ns_name.c b/resolv/ns_name.c index 65e7fc8079..0d76fe53a6 100644 --- a/resolv/ns_name.c +++ b/resolv/ns_name.c @@ -29,32 +29,10 @@ # define SPRINTF(x) ((size_t)sprintf x) -#define NS_TYPE_ELT 0x40 /*%< EDNS0 extended label type */ -#define DNS_LABELTYPE_BITSTRING 0x41 - /* Data. */ static const char digits[] = "0123456789"; -static const char digitvalue[256] = { - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /*16*/ - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /*32*/ - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /*48*/ - 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1, /*64*/ - -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, /*80*/ - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /*96*/ - -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, /*112*/ - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /*128*/ - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /*256*/ -}; - /* Forward. */ static int special(int); @@ -62,12 +40,7 @@ static int printable(int); static int dn_find(const u_char *, const u_char *, const u_char * const *, const u_char * const *); -static int encode_bitstring(const char **, const char *, - unsigned char **, unsigned char **, - unsigned const char *); static int labellen(const u_char *); -static int decode_bitstring(const unsigned char **, - char *, const char *); /* Public. */ @@ -115,22 +88,6 @@ ns_name_ntop(const u_char *src, char *dst, size_t dstsiz) __set_errno (EMSGSIZE); return (-1); } - if ((n & NS_CMPRSFLGS) == NS_TYPE_ELT) { - int m; - - if (n != DNS_LABELTYPE_BITSTRING) { - /* XXX: labellen should reject this case */ - __set_errno (EINVAL); - return(-1); - } - if ((m = decode_bitstring(&cp, dn, eom)) < 0) - { - __set_errno (EMSGSIZE); - return(-1); - } - dn += m; - continue; - } for ((void)NULL; l > 0; l--) { c = *cp++; if (special(c)) { @@ -192,7 +149,7 @@ int ns_name_pton(const char *src, u_char *dst, size_t dstsiz) { u_char *label, *bp, *eom; - int c, n, escaped, e = 0; + int c, n, escaped; char *cp; escaped = 0; @@ -202,28 +159,7 @@ ns_name_pton(const char *src, u_char *dst, size_t dstsiz) while ((c = *src++) != 0) { if (escaped) { - if (c == '[') { /*%< start a bit string label */ - if ((cp = strchr(src, ']')) == NULL) { - __set_errno (EINVAL); - return(-1); - } - if ((e = encode_bitstring(&src, cp + 2, - &label, &bp, eom)) - != 0) { - __set_errno (e); - return(-1); - } - escaped = 0; - label = bp++; - if ((c = *src++) == 0) - goto done; - else if (c != '.') { - __set_errno (EINVAL); - return(-1); - } - continue; - } - else if ((cp = strchr(digits, c)) != NULL) { + if ((cp = strchr(digits, c)) != NULL) { n = (cp - digits) * 100; if ((c = *src++) == 0 || (cp = strchr(digits, c)) == NULL) { @@ -291,7 +227,6 @@ ns_name_pton(const char *src, u_char *dst, size_t dstsiz) __set_errno (EMSGSIZE); return (-1); } - done: if (label >= eom) { __set_errno (EMSGSIZE); return (-1); @@ -394,7 +329,6 @@ ns_name_unpack(const u_char *msg, const u_char *eom, const u_char *src, /* Check for indirection. */ switch (n & NS_CMPRSFLGS) { case 0: - case NS_TYPE_ELT: /* Limit checks. */ if ((l = labellen(srcp - 1)) < 0) { __set_errno (EMSGSIZE); @@ -639,7 +573,6 @@ ns_name_skip(const u_char **ptrptr, const u_char *eom) { const u_char *cp; u_int n; - int l; cp = *ptrptr; while (cp < eom && (n = *cp++) != 0) { @@ -648,13 +581,6 @@ ns_name_skip(const u_char **ptrptr, const u_char *eom) case 0: /*%< normal case, n == len */ cp += n; continue; - case NS_TYPE_ELT: /*%< EDNS0 extended label */ - if ((l = labellen(cp - 1)) < 0) { - __set_errno (EMSGSIZE); - return(-1); - } - cp += l; - continue; case NS_CMPRSFLGS: /*%< indirection */ cp++; break; @@ -791,180 +717,14 @@ dn_find(const u_char *domain, const u_char *msg, return (-1); } +/* Return the length of the encoded label starting at LP, or -1 for + compression references and extended label types. */ static int -decode_bitstring(const unsigned char **cpp, char *dn, const char *eom) +labellen (const unsigned char *lp) { - const unsigned char *cp = *cpp; - char *beg = dn, tc; - int b, blen, plen, i; - - if ((blen = (*cp & 0xff)) == 0) - blen = 256; - plen = (blen + 3) / 4; - plen += sizeof("\\[x/]") + (blen > 99 ? 3 : (blen > 9) ? 2 : 1); - if (dn + plen >= eom) - return(-1); - - cp++; - i = SPRINTF((dn, "\\[x")); - if (i < 0) - return (-1); - dn += i; - for (b = blen; b > 7; b -= 8, cp++) { - i = SPRINTF((dn, "%02x", *cp & 0xff)); - if (i < 0) - return (-1); - dn += i; - } - if (b > 4) { - tc = *cp++; - i = SPRINTF((dn, "%02x", tc & (0xff << (8 - b)))); - if (i < 0) - return (-1); - dn += i; - } else if (b > 0) { - tc = *cp++; - i = SPRINTF((dn, "%1x", - ((tc >> 4) & 0x0f) & (0x0f << (4 - b)))); - if (i < 0) - return (-1); - dn += i; - } - i = SPRINTF((dn, "/%d]", blen)); - if (i < 0) - return (-1); - dn += i; - - *cpp = cp; - return(dn - beg); -} - -static int -encode_bitstring(const char **bp, const char *end, unsigned char **labelp, - unsigned char ** dst, unsigned const char *eom) -{ - int afterslash = 0; - const char *cp = *bp; - unsigned char *tp; - char c; - const char *beg_blen; - char *end_blen = NULL; - int value = 0, count = 0, tbcount = 0, blen = 0; - - beg_blen = end_blen = NULL; - - /* a bitstring must contain at least 2 characters */ - if (end - cp < 2) - return(EINVAL); - - /* XXX: currently, only hex strings are supported */ - if (*cp++ != 'x') - return(EINVAL); - if (!isxdigit((*cp) & 0xff)) /*%< reject '\[x/BLEN]' */ - return(EINVAL); - - for (tp = *dst + 1; cp < end && tp < eom; cp++) { - switch((c = *cp)) { - case ']': /*%< end of the bitstring */ - if (afterslash) { - if (beg_blen == NULL) - return(EINVAL); - blen = (int)strtol(beg_blen, &end_blen, 10); - if (*end_blen != ']') - return(EINVAL); - } - if (count) - *tp++ = ((value << 4) & 0xff); - cp++; /*%< skip ']' */ - goto done; - case '/': - afterslash = 1; - break; - default: - if (afterslash) { - if (!isdigit(c&0xff)) - return(EINVAL); - if (beg_blen == NULL) { - - if (c == '0') { - /* blen never begings with 0 */ - return(EINVAL); - } - beg_blen = cp; - } - } else { - if (!isxdigit(c&0xff)) - return(EINVAL); - value <<= 4; - value += digitvalue[(int)c]; - count += 4; - tbcount += 4; - if (tbcount > 256) - return(EINVAL); - if (count == 8) { - *tp++ = value; - count = 0; - } - } - break; - } - } - done: - if (cp >= end || tp >= eom) - return(EMSGSIZE); - - /* - * bit length validation: - * If a <length> is present, the number of digits in the <bit-data> - * MUST be just sufficient to contain the number of bits specified - * by the <length>. If there are insignificant bits in a final - * hexadecimal or octal digit, they MUST be zero. - * RFC2673, Section 3.2. - */ - if (blen > 0) { - int traillen; - - if (((blen + 3) & ~3) != tbcount) - return(EINVAL); - traillen = tbcount - blen; /*%< between 0 and 3 */ - if (((value << (8 - traillen)) & 0xff) != 0) - return(EINVAL); - } - else - blen = tbcount; - if (blen == 256) - blen = 0; - - /* encode the type and the significant bit fields */ - **labelp = DNS_LABELTYPE_BITSTRING; - **dst = blen; - - *bp = cp; - *dst = tp; - - return(0); -} - -static int -labellen(const u_char *lp) -{ - int bitlen; - u_char l = *lp; - - if ((l & NS_CMPRSFLGS) == NS_CMPRSFLGS) { - /* should be avoided by the caller */ - return(-1); - } - - if ((l & NS_CMPRSFLGS) == NS_TYPE_ELT) { - if (l == DNS_LABELTYPE_BITSTRING) { - if ((bitlen = *(lp + 1)) == 0) - bitlen = 256; - return((bitlen + 7 ) / 8 + 1); - } - return(-1); /*%< unknwon ELT */ - } - return(l); + if (*lp <= 63) + return *lp; + return -1; } /*! \file */ diff --git a/resolv/nss_dns/dns-host.c b/resolv/nss_dns/dns-host.c index b6245adb5f..c1333b816b 100644 --- a/resolv/nss_dns/dns-host.c +++ b/resolv/nss_dns/dns-host.c @@ -464,19 +464,6 @@ _nss_dns_gethostbyaddr2_r (const void *addr, socklen_t len, int af, (uaddr[2] & 0xff), (uaddr[1] & 0xff), (uaddr[0] & 0xff)); break; case AF_INET6: - /* Only lookup with the byte string format if the user wants it. */ - if (__glibc_unlikely (_res.options & RES_USEBSTRING)) - { - qp = stpcpy (qbuf, "\\[x"); - for (n = 0; n < IN6ADDRSZ; ++n) - qp += sprintf (qp, "%02hhx", uaddr[n]); - strcpy (qp, "].ip6.arpa"); - n = __libc_res_nquery (&_res, qbuf, C_IN, T_PTR, - host_buffer.buf->buf, 1024, &host_buffer.ptr, - NULL, NULL, NULL, NULL); - if (n >= 0) - goto got_it_already; - } qp = qbuf; for (n = IN6ADDRSZ - 1; n >= 0; n--) { @@ -504,7 +491,6 @@ _nss_dns_gethostbyaddr2_r (const void *addr, socklen_t len, int af, return errno == ECONNREFUSED ? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND; } - got_it_already: status = getanswer_r (host_buffer.buf, n, qbuf, T_PTR, result, buffer, buflen, errnop, h_errnop, 0 /* XXX */, ttlp, NULL); if (host_buffer.buf != orig_host_buffer) diff --git a/resolv/res_debug.c b/resolv/res_debug.c index 04046464dc..2cbb61ce6a 100644 --- a/resolv/res_debug.c +++ b/resolv/res_debug.c @@ -558,7 +558,6 @@ p_option(u_long option) { case RES_USE_INET6: return "inet6"; case RES_ROTATE: return "rotate"; case RES_BLAST: return "blast"; - case RES_USEBSTRING: return "ip6-bytestring"; case RES_USE_EDNS0: return "edns0"; case RES_SNGLKUP: return "single-request"; case RES_SNGLKUPREOP: return "single-request-reopen"; diff --git a/resolv/res_init.c b/resolv/res_init.c index 12afb9ea0a..b29c0d4ee5 100644 --- a/resolv/res_init.c +++ b/resolv/res_init.c @@ -438,7 +438,6 @@ res_setoptions(res_state statp, const char *options, const char *source) { } options[] = { #define STRnLEN(str) str, sizeof (str) - 1 { STRnLEN ("inet6"), 0, RES_USE_INET6 }, - { STRnLEN ("ip6-bytestring"), 0, RES_USEBSTRING }, { STRnLEN ("rotate"), 0, RES_ROTATE }, { STRnLEN ("edns0"), 0, RES_USE_EDNS0 }, { STRnLEN ("single-request-reopen"), 0, RES_SNGLKUPREOP }, diff --git a/resolv/resolv.h b/resolv/resolv.h index 11a7fed660..1062903699 100644 --- a/resolv/resolv.h +++ b/resolv/resolv.h @@ -197,8 +197,6 @@ struct res_sym { #define RES_KEEPTSIG \ __glibc_macro_warning ("RES_KEEPTSIG is deprecated") 0x00010000 #define RES_BLAST 0x00020000 /* blast all recursive servers */ -#define RES_USEBSTRING 0x00040000 /* IPv6 reverse lookup with byte - strings */ #define RES_USE_EDNS0 0x00100000 /* Use EDNS0. */ #define RES_SNGLKUP 0x00200000 /* one outstanding request at a time */ #define RES_SNGLKUPREOP 0x00400000 /* -"-, but open new socket for each |