+++ /dev/null
---- a/dns.c
-+++ b/dns.c
-@@ -880,6 +880,507 @@ void restell(char *s)
- fputs("\r",stderr);
- }
-
-+#ifdef __UCLIBC__
-+
-+static const char digits[] = "0123456789";
-+#define __set_errno(e) (errno = (e))
-+
-+#define NS_PUT16(s, cp) do { \
-+ register u_int16_t t_s = (u_int16_t)(s); \
-+ register u_char *t_cp = (u_char *)(cp); \
-+ *t_cp++ = t_s >> 8; \
-+ *t_cp = t_s; \
-+ (cp) += NS_INT16SZ; \
-+} while (0)
-+
-+
-+
-+#define NS_PUT32(l, cp) do { \
-+ register u_int32_t t_l = (u_int32_t)(l); \
-+ register u_char *t_cp = (u_char *)(cp); \
-+ *t_cp++ = t_l >> 24; \
-+ *t_cp++ = t_l >> 16; \
-+ *t_cp++ = t_l >> 8; \
-+ *t_cp = t_l; \
-+ (cp) += NS_INT32SZ; \
-+} while (0)
-+
-+
-+void
-+ns_put16(u_int src, u_char *dst) {
-+ NS_PUT16(src, dst);
-+}
-+
-+void
-+ns_put32(u_long src, u_char *dst) {
-+ NS_PUT32(src, dst);
-+}
-+
-+void __putshort(u_int16_t src, u_char *dst) { ns_put16(src, dst); }
-+void __putlong(u_int32_t src, u_char *dst) { ns_put32(src, dst); }
-+
-+int
-+mklower(int ch) {
-+ if (ch >= 0x41 && ch <= 0x5A)
-+ return (ch + 0x20);
-+ return (ch);
-+}
-+
-+
-+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 */
-+ 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);
-+}
-+
-+
-+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 {
-+ n = *srcp;
-+ if ((n & NS_CMPRSFLGS) != 0 && n != 0x41) {
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ if (n == 0x41)
-+ n = *++srcp / 8;
-+ l += n + 1;
-+ if (l > MAXCDNAME) {
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ srcp += n + 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 && n != 0x41 && 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) != 0 && n != 0x41) { /* Should not happen. */
-+ goto cleanup;
-+ }
-+ if (n == 0x41) {
-+ n = *++srcp / 8;
-+ if (dstp + 1 >= eob)
-+ goto cleanup;
-+ *dstp++ = 0x41;
-+ }
-+ if (dstp + 1 + n >= eob) {
-+ 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);
-+}
-+
-+
-+int
-+ns_name_pton(const char *src, u_char *dst, size_t dstsiz) {
-+ u_char *label, *bp, *eom;
-+ int c, n, escaped;
-+ char *cp;
-+
-+ escaped = 0;
-+ bp = dst;
-+ eom = dst + dstsiz;
-+ label = bp++;
-+
-+ while ((c = *src++) != 0) {
-+ if (escaped) {
-+ if ((cp = strchr(digits, c)) != NULL) {
-+ n = (cp - digits) * 100;
-+ if ((c = *src++) == 0 ||
-+ (cp = strchr(digits, c)) == NULL) {
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ n += (cp - digits) * 10;
-+ if ((c = *src++) == 0 ||
-+ (cp = strchr(digits, c)) == NULL) {
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ n += (cp - digits);
-+ if (n > 255) {
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ c = n;
-+ } else if (c == '[' && label == bp - 1 && *src == 'x') {
-+ /* Theoretically we would have to handle \[o
-+ as well but we do not since we do not need
-+ it internally. */
-+ *label = 0x41;
-+ label = bp++;
-+ ++src;
-+ while (isxdigit (*src)) {
-+ n = *src > '9' ? *src - 'a' + 10 : *src - '0';
-+ ++src;
-+ if (! isxdigit(*src)) {
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ n <<= 4;
-+ n += *src > '9' ? *src - 'a' + 10 : *src - '0';
-+ if (bp + 1 >= eom) {
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ *bp++ = n;
-+ ++src;
-+ }
-+ *label = (bp - label - 1) * 8;
-+ if (*src++ != ']' || *src++ != '.') {
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ escaped = 0;
-+ label = bp++;
-+ if (bp >= eom) {
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ continue;
-+ }
-+ escaped = 0;
-+ } else if (c == '\\') {
-+ escaped = 1;
-+ continue;
-+ } else if (c == '.') {
-+ c = (bp - label - 1);
-+ if ((c & NS_CMPRSFLGS) != 0) { /* Label too big. */
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ if (label >= eom) {
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ *label = c;
-+ /* Fully qualified ? */
-+ if (*src == '\0') {
-+ if (c != 0) {
-+ if (bp >= eom) {
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ *bp++ = '\0';
-+ }
-+ if ((bp - dst) > MAXCDNAME) {
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ return (1);
-+ }
-+ if (c == 0 || *src == '.') {
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ label = bp++;
-+ continue;
-+ }
-+ if (bp >= eom) {
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ *bp++ = (u_char)c;
-+ }
-+ c = (bp - label - 1);
-+ if ((c & NS_CMPRSFLGS) != 0) { /* Label too big. */
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ if (label >= eom) {
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ *label = c;
-+ if (c != 0) {
-+ if (bp >= eom) {
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ *bp++ = 0;
-+ }
-+ if ((bp - dst) > MAXCDNAME) { /* src too big */
-+ __set_errno (EMSGSIZE);
-+ return (-1);
-+ }
-+ return (0);
-+}
-+
-+
-+
-+int
-+ns_name_compress(const char *src, u_char *dst, size_t dstsiz,
-+ const u_char **dnptrs, const u_char **lastdnptr)
-+{
-+ u_char tmp[NS_MAXCDNAME];
-+
-+ if (ns_name_pton(src, tmp, sizeof tmp) == -1)
-+ return (-1);
-+ return (ns_name_pack(tmp, dst, dstsiz, dnptrs, lastdnptr));
-+}
-+
-+
-+int
-+dn_comp(const char *src, u_char *dst, int dstsiz,
-+ u_char **dnptrs, u_char **lastdnptr)
-+{
-+ return (ns_name_compress(src, dst, (size_t)dstsiz,
-+ (const u_char **)dnptrs,
-+ (const u_char **)lastdnptr));
-+}
-+
-+
-+
-+
-+int
-+res_nmkquery(res_state statp,
-+ int op, /* opcode of query */
-+ const char *dname, /* domain name */
-+ int class, int type, /* class and type of query */
-+ const u_char *data, /* resource record data */
-+ int datalen, /* length of data */
-+ const u_char *newrr_in, /* new rr for modify or append */
-+ u_char *buf, /* buffer to put query */
-+ int buflen) /* size of buffer */
-+{
-+ register HEADER *hp;
-+ register u_char *cp;
-+ register int n;
-+ u_char *dnptrs[20], **dpp, **lastdnptr;
-+
-+#ifdef DEBUG
-+ if (statp->options & RES_DEBUG)
-+ printf(";; res_nmkquery(%s, %s, %s, %s)\n",
-+ _res_opcodes[op], dname, p_class(class), p_type(type));
-+#endif
-+ /*
-+ * Initialize header fields.
-+ */
-+ if ((buf == NULL) || (buflen < HFIXEDSZ))
-+ return (-1);
-+ memset(buf, 0, HFIXEDSZ);
-+ hp = (HEADER *) buf;
-+ /* We randomize the IDs every time. The old code just
-+ incremented by one after the initial randomization which
-+ still predictable if the application does multiple
-+ requests. */
-+#if 0
-+ hp->id = htons(++statp->id);
-+#else
-+ hp->id = htons(statp->id);
-+ int randombits;
-+ do
-+ {
-+#ifdef RANDOM_BITS
-+ RANDOM_BITS (randombits);
-+#else
-+ struct timeval tv;
-+ gettimeofday (&tv, NULL);
-+ randombits = (tv.tv_sec << 8) ^ tv.tv_usec;
-+#endif
-+ }
-+ while ((randombits & 0xffff) == 0);
-+ statp->id = (statp->id + randombits) & 0xffff;
-+#endif
-+ hp->opcode = op;
-+ hp->rd = (statp->options & RES_RECURSE) != 0;
-+ hp->rcode = NOERROR;
-+ cp = buf + HFIXEDSZ;
-+ buflen -= HFIXEDSZ;
-+ dpp = dnptrs;
-+ *dpp++ = buf;
-+ *dpp++ = NULL;
-+ lastdnptr = dnptrs + sizeof dnptrs / sizeof dnptrs[0];
-+ /*
-+ * perform opcode specific processing
-+ */
-+ switch (op) {
-+ case QUERY: /*FALLTHROUGH*/
-+ case NS_NOTIFY_OP:
-+ if ((buflen -= QFIXEDSZ) < 0)
-+ return (-1);
-+ if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0)
-+ return (-1);
-+ cp += n;
-+ buflen -= n;
-+ __putshort(type, cp);
-+ cp += INT16SZ;
-+ __putshort(class, cp);
-+ cp += INT16SZ;
-+ hp->qdcount = htons(1);
-+ if (op == QUERY || data == NULL)
-+ break;
-+ /*
-+ * Make an additional record for completion domain.
-+ */
-+ buflen -= RRFIXEDSZ;
-+ n = dn_comp((char *)data, cp, buflen, dnptrs, lastdnptr);
-+ if (n < 0)
-+ return (-1);
-+ cp += n;
-+ buflen -= n;
-+ __putshort(T_NULL, cp);
-+ cp += INT16SZ;
-+ __putshort(class, cp);
-+ cp += INT16SZ;
-+ __putlong(0, cp);
-+ cp += INT32SZ;
-+ __putshort(0, cp);
-+ cp += INT16SZ;
-+ hp->arcount = htons(1);
-+ break;
-+
-+ case IQUERY:
-+ /*
-+ * Initialize answer section
-+ */
-+ if (buflen < 1 + RRFIXEDSZ + datalen)
-+ return (-1);
-+ *cp++ = '\0'; /* no domain name */
-+ __putshort(type, cp);
-+ cp += INT16SZ;
-+ __putshort(class, cp);
-+ cp += INT16SZ;
-+ __putlong(0, cp);
-+ cp += INT32SZ;
-+ __putshort(datalen, cp);
-+ cp += INT16SZ;
-+ if (datalen) {
-+ memcpy(cp, data, datalen);
-+ cp += datalen;
-+ }
-+ hp->ancount = htons(1);
-+ break;
-+
-+ default:
-+ return (-1);
-+ }
-+ return (cp - buf);
-+}
-+
-+int
-+res_mkquery(int op, /* opcode of query */
-+ const char *dname, /* domain name */
-+ int class, int type, /* class and type of query */
-+ const u_char *data, /* resource record data */
-+ int datalen, /* length of data */
-+ const u_char *newrr_in, /* new rr for modify or append */
-+ u_char *buf, /* buffer to put query */
-+ int buflen) /* size of buffer */
-+{
-+ return (res_nmkquery(&_res, op, dname, class, type,
-+ data, datalen,
-+ newrr_in, buf, buflen));
-+}
-+
-+#endif
-
- void dorequest(char *s,int type,word id)
- {
projects / openwrt / svn-archive / archive.git / commitdiff