isc_result_t
res_nupdate(res_state statp, ns_updrec *rrecp_in) {
ns_updrec *rrecp;
double answer[PACKETSZ / sizeof (double)];
double packet[2*PACKETSZ / sizeof (double)];
struct zonegrp *zptr, tgrp;
int nscount = 0;
unsigned n;
unsigned rval;
struct sockaddr_in nsaddrs[MAXNS];
ns_tsig_key *key;
void *zcookie = 0;
void *zcookp = &zcookie;
isc_result_t rcode;
again:
/* Make sure all the updates are in the same zone, and find out
what zone they are in. */
zptr = NULL;
for (rrecp = rrecp_in; rrecp; rrecp = ISC_LIST_NEXT(rrecp, r_link)) {
/* Find the origin for it if there is one. */
tgrp.z_class = rrecp->r_class;
rcode = res_findzonecut(statp, rrecp->r_dname, tgrp.z_class,
RES_EXHAUSTIVE,
tgrp.z_origin,
sizeof tgrp.z_origin,
tgrp.z_nsaddrs, MAXNS, &tgrp.z_nscount,
zcookp);
if (rcode != ISC_R_SUCCESS)
goto done;
if (tgrp.z_nscount <= 0) {
rcode = ISC_R_NOTZONE;
goto done;
}
/* Make a group for it if there isn't one. */
if (zptr == NULL) {
zptr = malloc(sizeof *zptr);
if (zptr == NULL) {
rcode = ISC_R_NOMEMORY;
goto done;
}
*zptr = tgrp;
zptr->z_flags = 0;
ISC_LIST_INIT(zptr->z_rrlist);
} else if (ns_samename(tgrp.z_origin, zptr->z_origin) == 0 ||
tgrp.z_class != zptr->z_class) {
/* Some of the records are in different zones. */
rcode = ISC_R_CROSSZONE;
goto done;
}
/* Thread this rrecp onto the zone group. */
ISC_LIST_APPEND(zptr->z_rrlist, rrecp, r_glink);
}
/* Construct zone section and prepend it. */
rrecp = res_mkupdrec(ns_s_zn, zptr->z_origin,
zptr->z_class, ns_t_soa, 0);
if (rrecp == NULL) {
rcode = ISC_R_UNEXPECTED;
goto done;
}
ISC_LIST_PREPEND(zptr->z_rrlist, rrecp, r_glink);
zptr->z_flags |= ZG_F_ZONESECTADDED;
/* Marshall the update message. */
n = sizeof packet;
rcode = res_nmkupdate(statp,
ISC_LIST_HEAD(zptr->z_rrlist), packet, &n);
if (rcode != ISC_R_SUCCESS)
goto done;
/* Temporarily replace the resolver's nameserver set. */
nscount = nscopy(nsaddrs, statp->nsaddr_list, statp->nscount);
statp->nscount = nsprom(statp->nsaddr_list,
zptr->z_nsaddrs, zptr->z_nscount);
/* Send the update and remember the result. */
key = (ns_tsig_key *)0;
rcode = find_tsig_key (&key, zptr->z_origin, zcookie);
if (rcode == ISC_R_SUCCESS) {
rcode = res_nsendsigned(statp, packet, n, key,
answer, sizeof answer, &rval);
tkey_free (&key);
} else if (rcode == ISC_R_NOTFOUND || rcode == ISC_R_KEY_UNKNOWN) {
rcode = res_nsend(statp, packet, n,
answer, sizeof answer, &rval);
}
if (rcode != ISC_R_SUCCESS)
goto undone;
rcode = ns_rcode_to_isc (((HEADER *)answer)->rcode);
if (zcookie && rcode == ISC_R_BADSIG) {
repudiate_zone (&zcookie);
}
undone:
/* Restore resolver's nameserver set. */
statp->nscount = nscopy(statp->nsaddr_list, nsaddrs, nscount);
nscount = 0;
done:
if (zptr) {
if ((zptr->z_flags & ZG_F_ZONESECTADDED) != 0)
res_freeupdrec(ISC_LIST_HEAD(zptr->z_rrlist));
free(zptr);
}
/* If the update failed because we used a cached zone and it
didn't work, try it again without the cached zone. */
if (zcookp && (rcode == ISC_R_NOTZONE || rcode == ISC_R_BADSIG)) {
zcookp = 0;
goto again;
}
if (zcookie)
forget_zone (&zcookie);
return rcode;
}
int
res_nupdate(res_state statp, ns_updrec *rrecp_in, ns_tsig_key *key) {
ns_updrec *rrecp;
u_char answer[PACKETSZ];
u_char *packet;
struct zonegrp *zptr, tgrp;
LIST(struct zonegrp) zgrps;
int nzones = 0, nscount = 0, n;
union res_sockaddr_union nsaddrs[MAXNS];
packet = malloc(NS_MAXMSG);
if (packet == NULL) {
DPRINTF(("malloc failed"));
return (0);
}
/* Thread all of the updates onto a list of groups. */
INIT_LIST(zgrps);
memset(&tgrp, 0, sizeof (tgrp));
for (rrecp = rrecp_in; rrecp;
rrecp = LINKED(rrecp, r_link) ? NEXT(rrecp, r_link) : NULL) {
int nscnt;
/* Find the origin for it if there is one. */
tgrp.z_class = rrecp->r_class;
nscnt = res_findzonecut2(statp, rrecp->r_dname, tgrp.z_class,
RES_EXHAUSTIVE, tgrp.z_origin,
sizeof tgrp.z_origin,
tgrp.z_nsaddrs, MAXNS);
if (nscnt <= 0) {
DPRINTF(("res_findzonecut failed (%d)", nscnt));
goto done;
}
tgrp.z_nscount = nscnt;
/* Find the group for it if there is one. */
for (zptr = HEAD(zgrps); zptr != NULL; zptr = NEXT(zptr, z_link))
if (ns_samename(tgrp.z_origin, zptr->z_origin) == 1 &&
tgrp.z_class == zptr->z_class)
break;
/* Make a group for it if there isn't one. */
if (zptr == NULL) {
zptr = malloc(sizeof *zptr);
if (zptr == NULL) {
DPRINTF(("malloc failed"));
goto done;
}
*zptr = tgrp;
zptr->z_flags = 0;
INIT_LINK(zptr, z_link);
INIT_LIST(zptr->z_rrlist);
APPEND(zgrps, zptr, z_link);
}
/* Thread this rrecp onto the right group. */
APPEND(zptr->z_rrlist, rrecp, r_glink);
}
for (zptr = HEAD(zgrps); zptr != NULL; zptr = NEXT(zptr, z_link)) {
/* Construct zone section and prepend it. */
rrecp = res_mkupdrec(ns_s_zn, zptr->z_origin,
zptr->z_class, ns_t_soa, 0);
if (rrecp == NULL) {
DPRINTF(("res_mkupdrec failed"));
goto done;
}
PREPEND(zptr->z_rrlist, rrecp, r_glink);
zptr->z_flags |= ZG_F_ZONESECTADDED;
/* Marshall the update message. */
n = res_nmkupdate(statp, HEAD(zptr->z_rrlist),
packet, NS_MAXMSG);
DPRINTF(("res_mkupdate -> %d", n));
if (n < 0)
goto done;
/* Temporarily replace the resolver's nameserver set. */
nscount = res_getservers(statp, nsaddrs, MAXNS);
res_setservers(statp, zptr->z_nsaddrs, zptr->z_nscount);
/* Send the update and remember the result. */
if (key != NULL)
n = res_nsendsigned(statp, packet, n, key,
answer, sizeof answer);
else
n = res_nsend(statp, packet, n, answer, sizeof answer);
if (n < 0) {
DPRINTF(("res_nsend: send error, n=%d (%s)\n",
n, strerror(errno)));
goto done;
}
if (((HEADER *)answer)->rcode == NOERROR)
nzones++;
/* Restore resolver's nameserver set. */
res_setservers(statp, nsaddrs, nscount);
nscount = 0;
}
done:
while (!EMPTY(zgrps)) {
zptr = HEAD(zgrps);
if ((zptr->z_flags & ZG_F_ZONESECTADDED) != 0)
res_freeupdrec(HEAD(zptr->z_rrlist));
UNLINK(zgrps, zptr, z_link);
free(zptr);
}
if (nscount != 0)
res_setservers(statp, nsaddrs, nscount);
free(packet);
return (nzones);
}