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Implement compression pointer rollback.

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dns_compress_backout() -> dns_compress_rollback()
This commit is contained in:
Mark Andrews
1999-05-03 03:07:16 +00:00
parent 1b9d5f3925
commit c1e7aff941
5 changed files with 72 additions and 13 deletions
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12
lib/dns/rdataset.c
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@@ -319,7 +319,8 @@ dns_rdataset_towire(dns_rdataset_t *rdataset,
st = *target;
result = dns_name_towire(owner_name, cctx, target);
if (result != DNS_R_SUCCESS) {
dns_compress_backout(cctx, st.used);
dns_compress_rollback(cctx, st.used);
*countp += count;
*target = st;
return (result);
}
@@ -329,7 +330,8 @@ dns_rdataset_towire(dns_rdataset_t *rdataset,
+ 2; /* XXX 2 for rdata len */
isc_buffer_available(target, &r);
if (r.length < headlen) {
dns_compress_backout(cctx, st.used);
dns_compress_rollback(cctx, st.used);
*countp += count;
*target = st;
return (DNS_R_NOSPACE);
}
@@ -351,14 +353,16 @@ dns_rdataset_towire(dns_rdataset_t *rdataset,
result = dns_compress_localinit(cctx, owner_name,
target);
if (result != DNS_R_SUCCESS) {
dns_compress_backout(cctx, st.used);
dns_compress_rollback(cctx, st.used);
*countp += count;
*target = st;
return (result);
}
result = dns_rdata_towire(&rdata, cctx, target);
dns_compress_localinvalidate(cctx);
if (result != DNS_R_SUCCESS) {
dns_compress_backout(cctx, st.used);
dns_compress_rollback(cctx, st.used);
*countp += count;
*target = st;
return (result);
}