diff options
Diffstat (limited to 'contrib/bind/named/ns_ncache.c')
| -rw-r--r-- | contrib/bind/named/ns_ncache.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/contrib/bind/named/ns_ncache.c b/contrib/bind/named/ns_ncache.c deleted file mode 100644 index ccacf61..0000000 --- a/contrib/bind/named/ns_ncache.c +++ /dev/null @@ -1,183 +0,0 @@ -/************************************************************************** - * ns_ncache.c - * author: anant kumar - * last modification: March 17, 1993 - * - * implements negative caching - */ - -#include <sys/types.h> -#include <sys/param.h> -#include <sys/socket.h> -#include <sys/file.h> -#include <netinet/in.h> -#include <arpa/nameser.h> -#include <syslog.h> -#include <errno.h> -#include <stdio.h> -#include <resolv.h> - -#include "named.h" - -#ifdef NCACHE - -#define BOUNDS_CHECK(ptr, count) \ - do { \ - if ((ptr) + (count) > eom) { \ - return; \ - } \ - } while (0) - -void -cache_n_resp(msg, msglen) - u_char *msg; - int msglen; -{ - register struct databuf *dp; - HEADER *hp; - u_char *cp, *eom, *rdatap; - char dname[MAXDNAME]; - int n; - int type, class; -#ifdef VALIDATE - int Vcode; -#endif - int flags; - u_int dlen; - - nameserIncr(from_addr.sin_addr, nssRcvdNXD); - - hp = (HEADER *)msg; - cp = msg+HFIXEDSZ; - eom = msg + msglen; - - n = dn_expand(msg, eom, cp, dname, sizeof dname); - if (n < 0) { - dprintf(1, (ddt, "Query expand name failed:cache_n_resp\n")); - hp->rcode = FORMERR; - return; - } - cp += n; - BOUNDS_CHECK(cp, 2 * INT16SZ); - GETSHORT(type, cp); - GETSHORT(class, cp); - dprintf(1, (ddt, - "ncache: dname %s, type %d, class %d\n", - dname, type, class)); - -#ifdef VALIDATE - Vcode = validate(dname, dname, &from_addr, type, class, NULL, 0, - hp->rcode == NXDOMAIN ? NXDOMAIN : NOERROR_NODATA); - if (Vcode == INVALID || Vcode == VALID_NO_CACHE) { - /*Valid_no_cache should never occur but doesn't hurt to check*/ - return; - } -#endif -#ifdef RETURNSOA - if (hp->nscount) { - u_int32_t ttl; - u_int16_t atype; - u_char *tp = cp; - u_char *cp1; - u_char data[MAXDNAME*2 + INT32SZ*5]; - size_t len = sizeof data; - - /* we store NXDOMAIN as T_SOA regardless of the query type */ - if (hp->rcode == NXDOMAIN) - type = T_SOA; - - /* store their SOA record */ - n = dn_skipname(tp, eom); - if (n < 0) { - dprintf(3, (ddt, "ncache: form error\n")); - return; - } - tp += n; - BOUNDS_CHECK(tp, 3 * INT16SZ + INT32SZ); - GETSHORT(atype, tp); /* type */ - if (atype != T_SOA) { - dprintf(3, (ddt, - "ncache: type (%d) != T_SOA\n",atype)); - goto no_soa; - } - tp += INT16SZ; /* class */ - GETLONG(ttl, tp); /* ttl */ - GETSHORT(dlen, tp); /* dlen */ - BOUNDS_CHECK(tp, dlen); - rdatap = tp; - - /* origin */ - n = dn_expand(msg, eom, tp, (char*)data, len); - if (n < 0) { - dprintf(3, (ddt, "ncache: form error 2\n")); - return; - } - tp += n; - n = strlen((char*)data) + 1; - cp1 = data + n; - len -= n; - /* mail */ - n = dn_expand(msg, msg + msglen, tp, (char*)cp1, len); - if (n < 0) { - dprintf(3, (ddt, "ncache: form error 2\n")); - return; - } - tp += n; - n = strlen((char*)cp1) + 1; - cp1 += n; - len -= n; - n = 5 * INT32SZ; - BOUNDS_CHECK(tp, n); - bcopy(tp, cp1, n); - /* serial, refresh, retry, expire, min */ - cp1 += n; - len -= n; - tp += n; - if (tp != rdatap + dlen) { - dprintf(3, (ddt, "ncache: form error 2\n")); - return; - } - /* store the zone of the soa record */ - n = dn_expand(msg, msg + msglen, cp, (char*)cp1, len); - if (n < 0) { - dprintf(3, (ddt, "ncache: form error 2\n")); - return; - } - n = strlen((char*)cp1) + 1; - cp1 += n; - - dp = savedata(class, type, MIN(ttl, NTTL) + tt.tv_sec, data, - cp1 - data); - } else { - no_soa: -#endif - dp = savedata(class, type, NTTL + tt.tv_sec, NULL, 0); -#ifdef RETURNSOA - } -#endif - dp->d_zone = DB_Z_CACHE; - dp->d_cred = hp->aa ? DB_C_AUTH : DB_C_ANSWER; - dp->d_clev = 0; - if(hp->rcode == NXDOMAIN) { - dp->d_rcode = NXDOMAIN; - flags = DB_NODATA|DB_NOTAUTH|DB_NOHINTS; - } else { - dp->d_rcode = NOERROR_NODATA; - flags = DB_NOTAUTH|DB_NOHINTS; - } - - if ((n = db_update(dname, dp, dp, flags, hashtab)) != OK) { - dprintf(1, (ddt, - "db_update failed return value:%d, cache_n_resp()\n", - n)); - db_free(dp); - return; - } - dprintf(4, (ddt, - "ncache succeeded: [%s %s %s] rcode:%d ttl:%ld\n", - dname, p_type(type), p_class(class), - dp->d_rcode, (long)(dp->d_ttl-tt.tv_sec))); - return; -} - -#endif /*NCACHE*/ |
